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526aed219f
haproxy/src/hlua.c
Willy Tarreau 526aed219f Revert "BUILD: lua: silence some compiler warnings about potential null derefs" 
This reverts commit f1ffb39b61.

It breaks Lua causing some timeouts. Removing the __unreachable() statement
from WILL_LJMP() fixes it. It's very strange and unclear whether it's an
issue with WILL_LJMP() not fullfilling its promise of not returning, if
the code emitted with __unreachable() gets broken, or anything else. Let's
revert this for now.
2018-10-16 17:32:55 +02:00

8169 lines
226 KiB
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/*
* Lua unsafe core engine
*
* Copyright 2015-2016 Thierry Fournier <tfournier@arpalert.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
#include <ctype.h>
#include <limits.h>
#include <setjmp.h>
#include <lauxlib.h>
#include <lua.h>
#include <lualib.h>
#if !defined(LUA_VERSION_NUM) || LUA_VERSION_NUM < 503
#error "Requires Lua 5.3 or later."
#endif
#include <ebpttree.h>
#include <common/cfgparse.h>
#include <common/xref.h>
#include <common/hathreads.h>
#include <types/cli.h>
#include <types/hlua.h>
#include <types/proxy.h>
#include <types/stats.h>
#include <proto/arg.h>
#include <proto/applet.h>
#include <proto/channel.h>
#include <proto/cli.h>
#include <proto/connection.h>
#include <proto/stats.h>
#include <proto/hdr_idx.h>
#include <proto/hlua.h>
#include <proto/hlua_fcn.h>
#include <proto/http_fetch.h>
#include <proto/http_rules.h>
#include <proto/map.h>
#include <proto/obj_type.h>
#include <proto/queue.h>
#include <proto/pattern.h>
#include <proto/payload.h>
#include <proto/proto_http.h>
#include <proto/sample.h>
#include <proto/server.h>
#include <proto/session.h>
#include <proto/stream.h>
#include <proto/stream_interface.h>
#include <proto/task.h>
#include <proto/tcp_rules.h>
#include <proto/vars.h>
/* Lua uses longjmp to perform yield or throwing errors. This
* macro is used only for identifying the function that can
* not return because a longjmp is executed.
* __LJMP marks a prototype of hlua file that can use longjmp.
* WILL_LJMP() marks an lua function that will use longjmp.
* MAY_LJMP() marks an lua function that may use longjmp.
*/
#define __LJMP
#define WILL_LJMP(func) func
#define MAY_LJMP(func) func
/* This couple of function executes securely some Lua calls outside of
* the lua runtime environment. Each Lua call can return a longjmp
* if it encounter a memory error.
*
* Lua documentation extract:
*
* If an error happens outside any protected environment, Lua calls
* a panic function (see lua_atpanic) and then calls abort, thus
* exiting the host application. Your panic function can avoid this
* exit by never returning (e.g., doing a long jump to your own
* recovery point outside Lua).
*
* The panic function runs as if it were a message handler (see
* §2.3); in particular, the error message is at the top of the
* stack. However, there is no guarantee about stack space. To push
* anything on the stack, the panic function must first check the
* available space (see §4.2).
*
* We must check all the Lua entry point. This includes:
* - The include/proto/hlua.h exported functions
* - the task wrapper function
* - The action wrapper function
* - The converters wrapper function
* - The sample-fetch wrapper functions
*
* It is tolerated that the initilisation function returns an abort.
* Before each Lua abort, an error message is writed on stderr.
*
* The macro SET_SAFE_LJMP initialise the longjmp. The Macro
* RESET_SAFE_LJMP reset the longjmp. These function must be macro
* because they must be exists in the program stack when the longjmp
* is called.
*
* Note that the Lua processing is not really thread safe. It provides
* heavy system which consists to add our own lock function in the Lua
* code and recompile the library. This system will probably not accepted
* by maintainers of various distribs.
*
* Our main excution point of the Lua is the function lua_resume(). A
* quick looking on the Lua sources displays a lua_lock() a the start
* of function and a lua_unlock() at the end of the function. So I
* conclude that the Lua thread safe mode just perform a mutex around
* all execution. So I prefer to do this in the HAProxy code, it will be
* easier for distro maintainers.
*
* Note that the HAProxy lua functions rounded by the macro SET_SAFE_LJMP
* and RESET_SAFE_LJMP manipulates the Lua stack, so it will be careful
* to set mutex around these functions.
*/
__decl_hathreads(HA_SPINLOCK_T hlua_global_lock);
THREAD_LOCAL jmp_buf safe_ljmp_env;
static int hlua_panic_safe(lua_State *L) { return 0; }
static int hlua_panic_ljmp(lua_State *L) { longjmp(safe_ljmp_env, 1); }
#define SET_SAFE_LJMP(__L) \
({ \
int ret; \
HA_SPIN_LOCK(LUA_LOCK, &hlua_global_lock); \
if (setjmp(safe_ljmp_env) != 0) { \
lua_atpanic(__L, hlua_panic_safe); \
ret = 0; \
HA_SPIN_UNLOCK(LUA_LOCK, &hlua_global_lock); \
} else { \
lua_atpanic(__L, hlua_panic_ljmp); \
ret = 1; \
} \
ret; \
})
/* If we are the last function catching Lua errors, we
* must reset the panic function.
*/
#define RESET_SAFE_LJMP(__L) \
do { \
lua_atpanic(__L, hlua_panic_safe); \
HA_SPIN_UNLOCK(LUA_LOCK, &hlua_global_lock); \
} while(0)
/* Applet status flags */
#define APPLET_DONE 0x01 /* applet processing is done. */
#define APPLET_100C 0x02 /* 100 continue expected. */
#define APPLET_HDR_SENT 0x04 /* Response header sent. */
#define APPLET_CHUNKED 0x08 /* Use transfer encoding chunked. */
#define APPLET_LAST_CHK 0x10 /* Last chunk sent. */
#define APPLET_HTTP11 0x20 /* Last chunk sent. */
/* The main Lua execution context. */
struct hlua gL;
/* This is the memory pool containing struct lua for applets
* (including cli).
*/
struct pool_head *pool_head_hlua;
/* Used for Socket connection. */
static struct proxy socket_proxy;
static struct server socket_tcp;
#ifdef USE_OPENSSL
static struct server socket_ssl;
#endif
/* List head of the function called at the initialisation time. */
struct list hlua_init_functions = LIST_HEAD_INIT(hlua_init_functions);
/* The following variables contains the reference of the different
* Lua classes. These references are useful for identify metadata
* associated with an object.
*/
static int class_txn_ref;
static int class_socket_ref;
static int class_channel_ref;
static int class_fetches_ref;
static int class_converters_ref;
static int class_http_ref;
static int class_map_ref;
static int class_applet_tcp_ref;
static int class_applet_http_ref;
/* Global Lua execution timeout. By default Lua, execution linked
* with stream (actions, sample-fetches and converters) have a
* short timeout. Lua linked with tasks doesn't have a timeout
* because a task may remain alive during all the haproxy execution.
*/
static unsigned int hlua_timeout_session = 4000; /* session timeout. */
static unsigned int hlua_timeout_task = TICK_ETERNITY; /* task timeout. */
static unsigned int hlua_timeout_applet = 4000; /* applet timeout. */
/* Interrupts the Lua processing each "hlua_nb_instruction" instructions.
* it is used for preventing infinite loops.
*
* I test the scheer with an infinite loop containing one incrementation
* and one test. I run this loop between 10 seconds, I raise a ceil of
* 710M loops from one interrupt each 9000 instructions, so I fix the value
* to one interrupt each 10 000 instructions.
*
* configured | Number of
* instructions | loops executed
* between two | in milions
* forced yields |
* ---------------+---------------
* 10 | 160
* 500 | 670
* 1000 | 680
* 5000 | 700
* 7000 | 700
* 8000 | 700
* 9000 | 710 <- ceil
* 10000 | 710
* 100000 | 710
* 1000000 | 710
*
*/
static unsigned int hlua_nb_instruction = 10000;
/* Descriptor for the memory allocation state. If limit is not null, it will
* be enforced on any memory allocation.
*/
struct hlua_mem_allocator {
size_t allocated;
size_t limit;
};
static struct hlua_mem_allocator hlua_global_allocator;
static const char error_500[] =
"HTTP/1.0 500 Internal Server Error\r\n"
"Cache-Control: no-cache\r\n"
"Connection: close\r\n"
"Content-Type: text/html\r\n"
"\r\n"
"<html><body><h1>500 Internal Server Error</h1>\nAn internal server error occured.\n</body></html>\n";
/* These functions converts types between HAProxy internal args or
* sample and LUA types. Another function permits to check if the
* LUA stack contains arguments according with an required ARG_T
* format.
*/
static int hlua_arg2lua(lua_State *L, const struct arg *arg);
static int hlua_lua2arg(lua_State *L, int ud, struct arg *arg);
__LJMP static int hlua_lua2arg_check(lua_State *L, int first, struct arg *argp,
uint64_t mask, struct proxy *p);
static int hlua_smp2lua(lua_State *L, struct sample *smp);
static int hlua_smp2lua_str(lua_State *L, struct sample *smp);
static int hlua_lua2smp(lua_State *L, int ud, struct sample *smp);
__LJMP static int hlua_http_get_headers(lua_State *L, struct hlua_txn *htxn, struct http_msg *msg);
#define SEND_ERR(__be, __fmt, __args...) \
do { \
send_log(__be, LOG_ERR, __fmt, ## __args); \
if (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) \
ha_alert(__fmt, ## __args); \
} while (0)
/* Used to check an Lua function type in the stack. It creates and
* returns a reference of the function. This function throws an
* error if the rgument is not a "function".
*/
__LJMP unsigned int hlua_checkfunction(lua_State *L, int argno)
{
if (!lua_isfunction(L, argno)) {
const char *msg = lua_pushfstring(L, "function expected, got %s", luaL_typename(L, argno));
WILL_LJMP(luaL_argerror(L, argno, msg));
}
lua_pushvalue(L, argno);
return luaL_ref(L, LUA_REGISTRYINDEX);
}
/* Return the string that is of the top of the stack. */
const char *hlua_get_top_error_string(lua_State *L)
{
if (lua_gettop(L) < 1)
return "unknown error";
if (lua_type(L, -1) != LUA_TSTRING)
return "unknown error";
return lua_tostring(L, -1);
}
__LJMP static const char *hlua_traceback(lua_State *L)
{
lua_Debug ar;
int level = 0;
struct buffer *msg = get_trash_chunk();
int filled = 0;
while (lua_getstack(L, level++, &ar)) {
/* Add separator */
if (filled)
chunk_appendf(msg, ", ");
filled = 1;
/* Fill fields:
* 'S': fills in the fields source, short_src, linedefined, lastlinedefined, and what;
* 'l': fills in the field currentline;
* 'n': fills in the field name and namewhat;
* 't': fills in the field istailcall;
*/
lua_getinfo(L, "Slnt", &ar);
/* Append code localisation */
if (ar.currentline > 0)
chunk_appendf(msg, "%s:%d ", ar.short_src, ar.currentline);
else
chunk_appendf(msg, "%s ", ar.short_src);
/*
* Get function name
*
* if namewhat is no empty, name is defined.
* what contains "Lua" for Lua function, "C" for C function,
* or "main" for main code.
*/
if (*ar.namewhat != '\0' && ar.name != NULL) /* is there a name from code? */
chunk_appendf(msg, "%s '%s'", ar.namewhat, ar.name); /* use it */
else if (*ar.what == 'm') /* "main", the code is not executed in a function */
chunk_appendf(msg, "main chunk");
else if (*ar.what != 'C') /* for Lua functions, use <file:line> */
chunk_appendf(msg, "C function line %d", ar.linedefined);
else /* nothing left... */
chunk_appendf(msg, "?");
/* Display tailed call */
if (ar.istailcall)
chunk_appendf(msg, " ...");
}
return msg->area;
}
/* This function check the number of arguments available in the
* stack. If the number of arguments available is not the same
* then <nb> an error is throwed.
*/
__LJMP static inline void check_args(lua_State *L, int nb, char *fcn)
{
if (lua_gettop(L) == nb)
return;
WILL_LJMP(luaL_error(L, "'%s' needs %d arguments", fcn, nb));
}
/* This function pushes an error string prefixed by the file name
* and the line number where the error is encountered.
*/
static int hlua_pusherror(lua_State *L, const char *fmt, ...)
{
va_list argp;
va_start(argp, fmt);
luaL_where(L, 1);
lua_pushvfstring(L, fmt, argp);
va_end(argp);
lua_concat(L, 2);
return 1;
}
/* This functions is used with sample fetch and converters. It
* converts the HAProxy configuration argument in a lua stack
* values.
*
* It takes an array of "arg", and each entry of the array is
* converted and pushed in the LUA stack.
*/
static int hlua_arg2lua(lua_State *L, const struct arg *arg)
{
switch (arg->type) {
case ARGT_SINT:
case ARGT_TIME:
case ARGT_SIZE:
lua_pushinteger(L, arg->data.sint);
break;
case ARGT_STR:
lua_pushlstring(L, arg->data.str.area, arg->data.str.data);
break;
case ARGT_IPV4:
case ARGT_IPV6:
case ARGT_MSK4:
case ARGT_MSK6:
case ARGT_FE:
case ARGT_BE:
case ARGT_TAB:
case ARGT_SRV:
case ARGT_USR:
case ARGT_MAP:
default:
lua_pushnil(L);
break;
}
return 1;
}
/* This function take one entrie in an LUA stack at the index "ud",
* and try to convert it in an HAProxy argument entry. This is useful
* with sample fetch wrappers. The input arguments are gived to the
* lua wrapper and converted as arg list by thi function.
*/
static int hlua_lua2arg(lua_State *L, int ud, struct arg *arg)
{
switch (lua_type(L, ud)) {
case LUA_TNUMBER:
case LUA_TBOOLEAN:
arg->type = ARGT_SINT;
arg->data.sint = lua_tointeger(L, ud);
break;
case LUA_TSTRING:
arg->type = ARGT_STR;
arg->data.str.area = (char *)lua_tolstring(L, ud, (size_t *)&arg->data.str.data);
break;
case LUA_TUSERDATA:
case LUA_TNIL:
case LUA_TTABLE:
case LUA_TFUNCTION:
case LUA_TTHREAD:
case LUA_TLIGHTUSERDATA:
arg->type = ARGT_SINT;
arg->data.sint = 0;
break;
}
return 1;
}
/* the following functions are used to convert a struct sample
* in Lua type. This useful to convert the return of the
* fetchs or converters.
*/
static int hlua_smp2lua(lua_State *L, struct sample *smp)
{
switch (smp->data.type) {
case SMP_T_SINT:
case SMP_T_BOOL:
lua_pushinteger(L, smp->data.u.sint);
break;
case SMP_T_BIN:
case SMP_T_STR:
lua_pushlstring(L, smp->data.u.str.area, smp->data.u.str.data);
break;
case SMP_T_METH:
switch (smp->data.u.meth.meth) {
case HTTP_METH_OPTIONS: lua_pushstring(L, "OPTIONS"); break;
case HTTP_METH_GET: lua_pushstring(L, "GET"); break;
case HTTP_METH_HEAD: lua_pushstring(L, "HEAD"); break;
case HTTP_METH_POST: lua_pushstring(L, "POST"); break;
case HTTP_METH_PUT: lua_pushstring(L, "PUT"); break;
case HTTP_METH_DELETE: lua_pushstring(L, "DELETE"); break;
case HTTP_METH_TRACE: lua_pushstring(L, "TRACE"); break;
case HTTP_METH_CONNECT: lua_pushstring(L, "CONNECT"); break;
case HTTP_METH_OTHER:
lua_pushlstring(L, smp->data.u.meth.str.area, smp->data.u.meth.str.data);
break;
default:
lua_pushnil(L);
break;
}
break;
case SMP_T_IPV4:
case SMP_T_IPV6:
case SMP_T_ADDR: /* This type is never used to qualify a sample. */
if (sample_casts[smp->data.type][SMP_T_STR] &&
sample_casts[smp->data.type][SMP_T_STR](smp))
lua_pushlstring(L, smp->data.u.str.area, smp->data.u.str.data);
else
lua_pushnil(L);
break;
default:
lua_pushnil(L);
break;
}
return 1;
}
/* the following functions are used to convert a struct sample
* in Lua strings. This is useful to convert the return of the
* fetchs or converters.
*/
static int hlua_smp2lua_str(lua_State *L, struct sample *smp)
{
switch (smp->data.type) {
case SMP_T_BIN:
case SMP_T_STR:
lua_pushlstring(L, smp->data.u.str.area, smp->data.u.str.data);
break;
case SMP_T_METH:
switch (smp->data.u.meth.meth) {
case HTTP_METH_OPTIONS: lua_pushstring(L, "OPTIONS"); break;
case HTTP_METH_GET: lua_pushstring(L, "GET"); break;
case HTTP_METH_HEAD: lua_pushstring(L, "HEAD"); break;
case HTTP_METH_POST: lua_pushstring(L, "POST"); break;
case HTTP_METH_PUT: lua_pushstring(L, "PUT"); break;
case HTTP_METH_DELETE: lua_pushstring(L, "DELETE"); break;
case HTTP_METH_TRACE: lua_pushstring(L, "TRACE"); break;
case HTTP_METH_CONNECT: lua_pushstring(L, "CONNECT"); break;
case HTTP_METH_OTHER:
lua_pushlstring(L, smp->data.u.meth.str.area, smp->data.u.meth.str.data);
break;
default:
lua_pushstring(L, "");
break;
}
break;
case SMP_T_SINT:
case SMP_T_BOOL:
case SMP_T_IPV4:
case SMP_T_IPV6:
case SMP_T_ADDR: /* This type is never used to qualify a sample. */
if (sample_casts[smp->data.type][SMP_T_STR] &&
sample_casts[smp->data.type][SMP_T_STR](smp))
lua_pushlstring(L, smp->data.u.str.area, smp->data.u.str.data);
else
lua_pushstring(L, "");
break;
default:
lua_pushstring(L, "");
break;
}
return 1;
}
/* the following functions are used to convert an Lua type in a
* struct sample. This is useful to provide data from a converter
* to the LUA code.
*/
static int hlua_lua2smp(lua_State *L, int ud, struct sample *smp)
{
switch (lua_type(L, ud)) {
case LUA_TNUMBER:
smp->data.type = SMP_T_SINT;
smp->data.u.sint = lua_tointeger(L, ud);
break;
case LUA_TBOOLEAN:
smp->data.type = SMP_T_BOOL;
smp->data.u.sint = lua_toboolean(L, ud);
break;
case LUA_TSTRING:
smp->data.type = SMP_T_STR;
smp->flags |= SMP_F_CONST;
smp->data.u.str.area = (char *)lua_tolstring(L, ud, (size_t *)&smp->data.u.str.data);
break;
case LUA_TUSERDATA:
case LUA_TNIL:
case LUA_TTABLE:
case LUA_TFUNCTION:
case LUA_TTHREAD:
case LUA_TLIGHTUSERDATA:
case LUA_TNONE:
default:
smp->data.type = SMP_T_BOOL;
smp->data.u.sint = 0;
break;
}
return 1;
}
/* This function check the "argp" builded by another conversion function
* is in accord with the expected argp defined by the "mask". The fucntion
* returns true or false. It can be adjust the types if there compatibles.
*
* This function assumes thant the argp argument contains ARGM_NBARGS + 1
* entries.
*/
__LJMP int hlua_lua2arg_check(lua_State *L, int first, struct arg *argp,
uint64_t mask, struct proxy *p)
{
int min_arg;
int idx;
struct proxy *px;
char *sname, *pname;
idx = 0;
min_arg = ARGM(mask);
mask >>= ARGM_BITS;
while (1) {
/* Check oversize. */
if (idx >= ARGM_NBARGS && argp[idx].type != ARGT_STOP) {
WILL_LJMP(luaL_argerror(L, first + idx, "Malformed argument mask"));
}
/* Check for mandatory arguments. */
if (argp[idx].type == ARGT_STOP) {
if (idx < min_arg) {
/* If miss other argument than the first one, we return an error. */
if (idx > 0)
WILL_LJMP(luaL_argerror(L, first + idx, "Mandatory argument expected"));
/* If first argument have a certain type, some default values
* may be used. See the function smp_resolve_args().
*/
switch (mask & ARGT_MASK) {
case ARGT_FE:
if (!(p->cap & PR_CAP_FE))
WILL_LJMP(luaL_argerror(L, first + idx, "Mandatory argument expected"));
argp[idx].data.prx = p;
argp[idx].type = ARGT_FE;
argp[idx+1].type = ARGT_STOP;
break;
case ARGT_BE:
if (!(p->cap & PR_CAP_BE))
WILL_LJMP(luaL_argerror(L, first + idx, "Mandatory argument expected"));
argp[idx].data.prx = p;
argp[idx].type = ARGT_BE;
argp[idx+1].type = ARGT_STOP;
break;
case ARGT_TAB:
argp[idx].data.prx = p;
argp[idx].type = ARGT_TAB;
argp[idx+1].type = ARGT_STOP;
break;
default:
WILL_LJMP(luaL_argerror(L, first + idx, "Mandatory argument expected"));
break;
}
}
return 0;
}
/* Check for exceed the number of requiered argument. */
if ((mask & ARGT_MASK) == ARGT_STOP &&
argp[idx].type != ARGT_STOP) {
WILL_LJMP(luaL_argerror(L, first + idx, "Last argument expected"));
}
if ((mask & ARGT_MASK) == ARGT_STOP &&
argp[idx].type == ARGT_STOP) {
return 0;
}
/* Convert some argument types. */
switch (mask & ARGT_MASK) {
case ARGT_SINT:
if (argp[idx].type != ARGT_SINT)
WILL_LJMP(luaL_argerror(L, first + idx, "integer expected"));
argp[idx].type = ARGT_SINT;
break;
case ARGT_TIME:
if (argp[idx].type != ARGT_SINT)
WILL_LJMP(luaL_argerror(L, first + idx, "integer expected"));
argp[idx].type = ARGT_TIME;
break;
case ARGT_SIZE:
if (argp[idx].type != ARGT_SINT)
WILL_LJMP(luaL_argerror(L, first + idx, "integer expected"));
argp[idx].type = ARGT_SIZE;
break;
case ARGT_FE:
if (argp[idx].type != ARGT_STR)
WILL_LJMP(luaL_argerror(L, first + idx, "string expected"));
memcpy(trash.area, argp[idx].data.str.area,
argp[idx].data.str.data);
trash.area[argp[idx].data.str.data] = 0;
argp[idx].data.prx = proxy_fe_by_name(trash.area);
if (!argp[idx].data.prx)
WILL_LJMP(luaL_argerror(L, first + idx, "frontend doesn't exist"));
argp[idx].type = ARGT_FE;
break;
case ARGT_BE:
if (argp[idx].type != ARGT_STR)
WILL_LJMP(luaL_argerror(L, first + idx, "string expected"));
memcpy(trash.area, argp[idx].data.str.area,
argp[idx].data.str.data);
trash.area[argp[idx].data.str.data] = 0;
argp[idx].data.prx = proxy_be_by_name(trash.area);
if (!argp[idx].data.prx)
WILL_LJMP(luaL_argerror(L, first + idx, "backend doesn't exist"));
argp[idx].type = ARGT_BE;
break;
case ARGT_TAB:
if (argp[idx].type != ARGT_STR)
WILL_LJMP(luaL_argerror(L, first + idx, "string expected"));
memcpy(trash.area, argp[idx].data.str.area,
argp[idx].data.str.data);
trash.area[argp[idx].data.str.data] = 0;
argp[idx].data.prx = proxy_tbl_by_name(trash.area);
if (!argp[idx].data.prx)
WILL_LJMP(luaL_argerror(L, first + idx, "table doesn't exist"));
argp[idx].type = ARGT_TAB;
break;
case ARGT_SRV:
if (argp[idx].type != ARGT_STR)
WILL_LJMP(luaL_argerror(L, first + idx, "string expected"));
memcpy(trash.area, argp[idx].data.str.area,
argp[idx].data.str.data);
trash.area[argp[idx].data.str.data] = 0;
sname = strrchr(trash.area, '/');
if (sname) {
*sname++ = '\0';
pname = trash.area;
px = proxy_be_by_name(pname);
if (!px)
WILL_LJMP(luaL_argerror(L, first + idx, "backend doesn't exist"));
}
else {
sname = trash.area;
px = p;
}
argp[idx].data.srv = findserver(px, sname);
if (!argp[idx].data.srv)
WILL_LJMP(luaL_argerror(L, first + idx, "server doesn't exist"));
argp[idx].type = ARGT_SRV;
break;
case ARGT_IPV4:
memcpy(trash.area, argp[idx].data.str.area,
argp[idx].data.str.data);
trash.area[argp[idx].data.str.data] = 0;
if (inet_pton(AF_INET, trash.area, &argp[idx].data.ipv4))
WILL_LJMP(luaL_argerror(L, first + idx, "invalid IPv4 address"));
argp[idx].type = ARGT_IPV4;
break;
case ARGT_MSK4:
memcpy(trash.area, argp[idx].data.str.area,
argp[idx].data.str.data);
trash.area[argp[idx].data.str.data] = 0;
if (!str2mask(trash.area, &argp[idx].data.ipv4))
WILL_LJMP(luaL_argerror(L, first + idx, "invalid IPv4 mask"));
argp[idx].type = ARGT_MSK4;
break;
case ARGT_IPV6:
memcpy(trash.area, argp[idx].data.str.area,
argp[idx].data.str.data);
trash.area[argp[idx].data.str.data] = 0;
if (inet_pton(AF_INET6, trash.area, &argp[idx].data.ipv6))
WILL_LJMP(luaL_argerror(L, first + idx, "invalid IPv6 address"));
argp[idx].type = ARGT_IPV6;
break;
case ARGT_MSK6:
memcpy(trash.area, argp[idx].data.str.area,
argp[idx].data.str.data);
trash.area[argp[idx].data.str.data] = 0;
if (!str2mask6(trash.area, &argp[idx].data.ipv6))
WILL_LJMP(luaL_argerror(L, first + idx, "invalid IPv6 mask"));
argp[idx].type = ARGT_MSK6;
break;
case ARGT_MAP:
case ARGT_REG:
case ARGT_USR:
WILL_LJMP(luaL_argerror(L, first + idx, "type not yet supported"));
break;
}
/* Check for type of argument. */
if ((mask & ARGT_MASK) != argp[idx].type) {
const char *msg = lua_pushfstring(L, "'%s' expected, got '%s'",
arg_type_names[(mask & ARGT_MASK)],
arg_type_names[argp[idx].type & ARGT_MASK]);
WILL_LJMP(luaL_argerror(L, first + idx, msg));
}
/* Next argument. */
mask >>= ARGT_BITS;
idx++;
}
}
/*
* The following functions are used to make correspondance between the the
* executed lua pointer and the "struct hlua *" that contain the context.
*
* - hlua_gethlua : return the hlua context associated with an lua_State.
* - hlua_sethlua : create the association between hlua context and lua_state.
*/
static inline struct hlua *hlua_gethlua(lua_State *L)
{
struct hlua **hlua = lua_getextraspace(L);
return *hlua;
}
static inline void hlua_sethlua(struct hlua *hlua)
{
struct hlua **hlua_store = lua_getextraspace(hlua->T);
*hlua_store = hlua;
}
/* This function is used to send logs. It try to send on screen (stderr)
* and on the default syslog server.
*/
static inline void hlua_sendlog(struct proxy *px, int level, const char *msg)
{
struct tm tm;
char *p;
/* Cleanup the log message. */
p = trash.area;
for (; *msg != '\0'; msg++, p++) {
if (p >= trash.area + trash.size - 1) {
/* Break the message if exceed the buffer size. */
*(p-4) = ' ';
*(p-3) = '.';
*(p-2) = '.';
*(p-1) = '.';
break;
}
if (isprint(*msg))
*p = *msg;
else
*p = '.';
}
*p = '\0';
send_log(px, level, "%s\n", trash.area);
if (!(global.mode & MODE_QUIET) || (global.mode & (MODE_VERBOSE | MODE_STARTING))) {
get_localtime(date.tv_sec, &tm);
fprintf(stderr, "[%s] %03d/%02d%02d%02d (%d) : %s\n",
log_levels[level], tm.tm_yday, tm.tm_hour, tm.tm_min, tm.tm_sec,
(int)getpid(), trash.area);
fflush(stderr);
}
}
/* This function just ensure that the yield will be always
* returned with a timeout and permit to set some flags
*/
__LJMP void hlua_yieldk(lua_State *L, int nresults, int ctx,
lua_KFunction k, int timeout, unsigned int flags)
{
struct hlua *hlua = hlua_gethlua(L);
/* Set the wake timeout. If timeout is required, we set
* the expiration time.
*/
hlua->wake_time = timeout;
hlua->flags |= flags;
/* Process the yield. */
WILL_LJMP(lua_yieldk(L, nresults, ctx, k));
}
/* This function initialises the Lua environment stored in the stream.
* It must be called at the start of the stream. This function creates
* an LUA coroutine. It can not be use to crete the main LUA context.
*
* This function is particular. it initialises a new Lua thread. If the
* initialisation fails (example: out of memory error), the lua function
* throws an error (longjmp).
*
* This function manipulates two Lua stack: the main and the thread. Only
* the main stack can fail. The thread is not manipulated. This function
* MUST NOT manipulate the created thread stack state, because is not
* proctected agains error throwed by the thread stack.
*/
int hlua_ctx_init(struct hlua *lua, struct task *task)
{
if (!SET_SAFE_LJMP(gL.T)) {
lua->Tref = LUA_REFNIL;
return 0;
}
lua->Mref = LUA_REFNIL;
lua->flags = 0;
LIST_INIT(&lua->com);
lua->T = lua_newthread(gL.T);
if (!lua->T) {
lua->Tref = LUA_REFNIL;
RESET_SAFE_LJMP(gL.T);
return 0;
}
hlua_sethlua(lua);
lua->Tref = luaL_ref(gL.T, LUA_REGISTRYINDEX);
lua->task = task;
RESET_SAFE_LJMP(gL.T);
return 1;
}
/* Used to destroy the Lua coroutine when the attached stream or task
* is destroyed. The destroy also the memory context. The struct "lua"
* is not freed.
*/
void hlua_ctx_destroy(struct hlua *lua)
{
if (!lua)
return;
if (!lua->T)
goto end;
/* Purge all the pending signals. */
notification_purge(&lua->com);
if (!SET_SAFE_LJMP(lua->T))
return;
luaL_unref(lua->T, LUA_REGISTRYINDEX, lua->Mref);
RESET_SAFE_LJMP(lua->T);
if (!SET_SAFE_LJMP(gL.T))
return;
luaL_unref(gL.T, LUA_REGISTRYINDEX, lua->Tref);
RESET_SAFE_LJMP(gL.T);
/* Forces a garbage collecting process. If the Lua program is finished
* without error, we run the GC on the thread pointer. Its freed all
* the unused memory.
* If the thread is finnish with an error or is currently yielded,
* it seems that the GC applied on the thread doesn't clean anything,
* so e run the GC on the main thread.
* NOTE: maybe this action locks all the Lua threads untiml the en of
* the garbage collection.
*/
if (lua->flags & HLUA_MUST_GC) {
if (!SET_SAFE_LJMP(gL.T))
return;
lua_gc(gL.T, LUA_GCCOLLECT, 0);
RESET_SAFE_LJMP(gL.T);
}
lua->T = NULL;
end:
pool_free(pool_head_hlua, lua);
}
/* This function is used to restore the Lua context when a coroutine
* fails. This function copy the common memory between old coroutine
* and the new coroutine. The old coroutine is destroyed, and its
* replaced by the new coroutine.
* If the flag "keep_msg" is set, the last entry of the old is assumed
* as string error message and it is copied in the new stack.
*/
static int hlua_ctx_renew(struct hlua *lua, int keep_msg)
{
lua_State *T;
int new_ref;
/* Renew the main LUA stack doesn't have sense. */
if (lua == &gL)
return 0;
/* New Lua coroutine. */
T = lua_newthread(gL.T);
if (!T)
return 0;
/* Copy last error message. */
if (keep_msg)
lua_xmove(lua->T, T, 1);
/* Copy data between the coroutines. */
lua_rawgeti(lua->T, LUA_REGISTRYINDEX, lua->Mref);
lua_xmove(lua->T, T, 1);
new_ref = luaL_ref(T, LUA_REGISTRYINDEX); /* Valur poped. */
/* Destroy old data. */
luaL_unref(lua->T, LUA_REGISTRYINDEX, lua->Mref);
/* The thread is garbage collected by Lua. */
luaL_unref(gL.T, LUA_REGISTRYINDEX, lua->Tref);
/* Fill the struct with the new coroutine values. */
lua->Mref = new_ref;
lua->T = T;
lua->Tref = luaL_ref(gL.T, LUA_REGISTRYINDEX);
/* Set context. */
hlua_sethlua(lua);
return 1;
}
void hlua_hook(lua_State *L, lua_Debug *ar)
{
struct hlua *hlua = hlua_gethlua(L);
/* Lua cannot yield when its returning from a function,
* so, we can fix the interrupt hook to 1 instruction,
* expecting that the function is finnished.
*/
if (lua_gethookmask(L) & LUA_MASKRET) {
lua_sethook(hlua->T, hlua_hook, LUA_MASKCOUNT, 1);
return;
}
/* restore the interrupt condition. */
lua_sethook(hlua->T, hlua_hook, LUA_MASKCOUNT, hlua_nb_instruction);
/* If we interrupt the Lua processing in yieldable state, we yield.
* If the state is not yieldable, trying yield causes an error.
*/
if (lua_isyieldable(L))
WILL_LJMP(hlua_yieldk(L, 0, 0, NULL, TICK_ETERNITY, HLUA_CTRLYIELD));
/* If we cannot yield, update the clock and check the timeout. */
tv_update_date(0, 1);
hlua->run_time += now_ms - hlua->start_time;
if (hlua->max_time && hlua->run_time >= hlua->max_time) {
lua_pushfstring(L, "execution timeout");
WILL_LJMP(lua_error(L));
}
/* Update the start time. */
hlua->start_time = now_ms;
/* Try to interrupt the process at the end of the current
* unyieldable function.
*/
lua_sethook(hlua->T, hlua_hook, LUA_MASKRET|LUA_MASKCOUNT, hlua_nb_instruction);
}
/* This function start or resumes the Lua stack execution. If the flag
* "yield_allowed" if no set and the LUA stack execution returns a yield
* The function return an error.
*
* The function can returns 4 values:
* - HLUA_E_OK : The execution is terminated without any errors.
* - HLUA_E_AGAIN : The execution must continue at the next associated
* task wakeup.
* - HLUA_E_ERRMSG : An error has occured, an error message is set in
* the top of the stack.
* - HLUA_E_ERR : An error has occured without error message.
*
* If an error occured, the stack is renewed and it is ready to run new
* LUA code.
*/
static enum hlua_exec hlua_ctx_resume(struct hlua *lua, int yield_allowed)
{
int ret;
const char *msg;
const char *trace;
/* Initialise run time counter. */
if (!HLUA_IS_RUNNING(lua))
lua->run_time = 0;
/* Lock the whole Lua execution. This lock must be before the
* label "resume_execution".
*/
HA_SPIN_LOCK(LUA_LOCK, &hlua_global_lock);
resume_execution:
/* This hook interrupts the Lua processing each 'hlua_nb_instruction'
* instructions. it is used for preventing infinite loops.
*/
lua_sethook(lua->T, hlua_hook, LUA_MASKCOUNT, hlua_nb_instruction);
/* Remove all flags except the running flags. */
HLUA_SET_RUN(lua);
HLUA_CLR_CTRLYIELD(lua);
HLUA_CLR_WAKERESWR(lua);
HLUA_CLR_WAKEREQWR(lua);
/* Update the start time. */
lua->start_time = now_ms;
/* Call the function. */
ret = lua_resume(lua->T, gL.T, lua->nargs);
switch (ret) {
case LUA_OK:
ret = HLUA_E_OK;
break;
case LUA_YIELD:
/* Check if the execution timeout is expired. It it is the case, we
* break the Lua execution.
*/
tv_update_date(0, 1);
lua->run_time += now_ms - lua->start_time;
if (lua->max_time && lua->run_time > lua->max_time) {
lua_settop(lua->T, 0); /* Empty the stack. */
ret = HLUA_E_ETMOUT;
break;
}
/* Process the forced yield. if the general yield is not allowed or
* if no task were associated this the current Lua execution
* coroutine, we resume the execution. Else we want to return in the
* scheduler and we want to be waked up again, to continue the
* current Lua execution. So we schedule our own task.
*/
if (HLUA_IS_CTRLYIELDING(lua)) {
if (!yield_allowed || !lua->task)
goto resume_execution;
task_wakeup(lua->task, TASK_WOKEN_MSG);
}
if (!yield_allowed) {
lua_settop(lua->T, 0); /* Empty the stack. */
ret = HLUA_E_YIELD;
break;
}
ret = HLUA_E_AGAIN;
break;
case LUA_ERRRUN:
/* Special exit case. The traditionnal exit is returned as an error
* because the errors ares the only one mean to return immediately
* from and lua execution.
*/
if (lua->flags & HLUA_EXIT) {
ret = HLUA_E_OK;
hlua_ctx_renew(lua, 0);
break;
}
lua->wake_time = TICK_ETERNITY;
if (!lua_checkstack(lua->T, 1)) {
ret = HLUA_E_ERR;
break;
}
msg = lua_tostring(lua->T, -1);
lua_settop(lua->T, 0); /* Empty the stack. */
lua_pop(lua->T, 1);
trace = hlua_traceback(lua->T);
if (msg)
lua_pushfstring(lua->T, "runtime error: %s from %s", msg, trace);
else
lua_pushfstring(lua->T, "unknown runtime error from %s", trace);
ret = HLUA_E_ERRMSG;
break;
case LUA_ERRMEM:
lua->wake_time = TICK_ETERNITY;
lua_settop(lua->T, 0); /* Empty the stack. */
ret = HLUA_E_NOMEM;
break;
case LUA_ERRERR:
lua->wake_time = TICK_ETERNITY;
if (!lua_checkstack(lua->T, 1)) {
ret = HLUA_E_ERR;
break;
}
msg = lua_tostring(lua->T, -1);
lua_settop(lua->T, 0); /* Empty the stack. */
lua_pop(lua->T, 1);
if (msg)
lua_pushfstring(lua->T, "message handler error: %s", msg);
else
lua_pushfstring(lua->T, "message handler error");
ret = HLUA_E_ERRMSG;
break;
default:
lua->wake_time = TICK_ETERNITY;
lua_settop(lua->T, 0); /* Empty the stack. */
ret = HLUA_E_ERR;
break;
}
/* This GC permits to destroy some object when a Lua timeout strikes. */
if (lua->flags & HLUA_MUST_GC &&
ret != HLUA_E_AGAIN)
lua_gc(lua->T, LUA_GCCOLLECT, 0);
switch (ret) {
case HLUA_E_AGAIN:
break;
case HLUA_E_ERRMSG:
notification_purge(&lua->com);
hlua_ctx_renew(lua, 1);
HLUA_CLR_RUN(lua);
break;
case HLUA_E_ETMOUT:
case HLUA_E_NOMEM:
case HLUA_E_YIELD:
case HLUA_E_ERR:
HLUA_CLR_RUN(lua);
notification_purge(&lua->com);
hlua_ctx_renew(lua, 0);
break;
case HLUA_E_OK:
HLUA_CLR_RUN(lua);
notification_purge(&lua->com);
break;
}
/* This is the main exit point, remove the Lua lock. */
HA_SPIN_UNLOCK(LUA_LOCK, &hlua_global_lock);
return ret;
}
/* This function exit the current code. */
__LJMP static int hlua_done(lua_State *L)
{
struct hlua *hlua = hlua_gethlua(L);
hlua->flags |= HLUA_EXIT;
WILL_LJMP(lua_error(L));
return 0;
}
/* This function is an LUA binding. It provides a function
* for deleting ACL from a referenced ACL file.
*/
__LJMP static int hlua_del_acl(lua_State *L)
{
const char *name;
const char *key;
struct pat_ref *ref;
MAY_LJMP(check_args(L, 2, "del_acl"));
name = MAY_LJMP(luaL_checkstring(L, 1));
key = MAY_LJMP(luaL_checkstring(L, 2));
ref = pat_ref_lookup(name);
if (!ref)
WILL_LJMP(luaL_error(L, "'del_acl': unknown acl file '%s'", name));
pat_ref_delete(ref, key);
return 0;
}
/* This function is an LUA binding. It provides a function
* for deleting map entry from a referenced map file.
*/
static int hlua_del_map(lua_State *L)
{
const char *name;
const char *key;
struct pat_ref *ref;
MAY_LJMP(check_args(L, 2, "del_map"));
name = MAY_LJMP(luaL_checkstring(L, 1));
key = MAY_LJMP(luaL_checkstring(L, 2));
ref = pat_ref_lookup(name);
if (!ref)
WILL_LJMP(luaL_error(L, "'del_map': unknown acl file '%s'", name));
pat_ref_delete(ref, key);
return 0;
}
/* This function is an LUA binding. It provides a function
* for adding ACL pattern from a referenced ACL file.
*/
static int hlua_add_acl(lua_State *L)
{
const char *name;
const char *key;
struct pat_ref *ref;
MAY_LJMP(check_args(L, 2, "add_acl"));
name = MAY_LJMP(luaL_checkstring(L, 1));
key = MAY_LJMP(luaL_checkstring(L, 2));
ref = pat_ref_lookup(name);
if (!ref)
WILL_LJMP(luaL_error(L, "'add_acl': unknown acl file '%s'", name));
if (pat_ref_find_elt(ref, key) == NULL)
pat_ref_add(ref, key, NULL, NULL);
return 0;
}
/* This function is an LUA binding. It provides a function
* for setting map pattern and sample from a referenced map
* file.
*/
static int hlua_set_map(lua_State *L)
{
const char *name;
const char *key;
const char *value;
struct pat_ref *ref;
MAY_LJMP(check_args(L, 3, "set_map"));
name = MAY_LJMP(luaL_checkstring(L, 1));
key = MAY_LJMP(luaL_checkstring(L, 2));
value = MAY_LJMP(luaL_checkstring(L, 3));
ref = pat_ref_lookup(name);
if (!ref)
WILL_LJMP(luaL_error(L, "'set_map': unknown map file '%s'", name));
if (pat_ref_find_elt(ref, key) != NULL)
pat_ref_set(ref, key, value, NULL);
else
pat_ref_add(ref, key, value, NULL);
return 0;
}
/* A class is a lot of memory that contain data. This data can be a table,
* an integer or user data. This data is associated with a metatable. This
* metatable have an original version registred in the global context with
* the name of the object (_G[<name>] = <metable> ).
*
* A metable is a table that modify the standard behavior of a standard
* access to the associated data. The entries of this new metatable are
* defined as is:
*
* http://lua-users.org/wiki/MetatableEvents
*
* __index
*
* we access an absent field in a table, the result is nil. This is
* true, but it is not the whole truth. Actually, such access triggers
* the interpreter to look for an __index metamethod: If there is no
* such method, as usually happens, then the access results in nil;
* otherwise, the metamethod will provide the result.
*
* Control 'prototype' inheritance. When accessing "myTable[key]" and
* the key does not appear in the table, but the metatable has an __index
* property:
*
* - if the value is a function, the function is called, passing in the
* table and the key; the return value of that function is returned as
* the result.
*
* - if the value is another table, the value of the key in that table is
* asked for and returned (and if it doesn't exist in that table, but that
* table's metatable has an __index property, then it continues on up)
*
* - Use "rawget(myTable,key)" to skip this metamethod.
*
* http://www.lua.org/pil/13.4.1.html
*
* __newindex
*
* Like __index, but control property assignment.
*
* __mode - Control weak references. A string value with one or both
* of the characters 'k' and 'v' which specifies that the the
* keys and/or values in the table are weak references.
*
* __call - Treat a table like a function. When a table is followed by
* parenthesis such as "myTable( 'foo' )" and the metatable has
* a __call key pointing to a function, that function is invoked
* (passing any specified arguments) and the return value is
* returned.
*
* __metatable - Hide the metatable. When "getmetatable( myTable )" is
* called, if the metatable for myTable has a __metatable
* key, the value of that key is returned instead of the
* actual metatable.
*
* __tostring - Control string representation. When the builtin
* "tostring( myTable )" function is called, if the metatable
* for myTable has a __tostring property set to a function,
* that function is invoked (passing myTable to it) and the
* return value is used as the string representation.
*
* __len - Control table length. When the table length is requested using
* the length operator ( '#' ), if the metatable for myTable has
* a __len key pointing to a function, that function is invoked
* (passing myTable to it) and the return value used as the value
* of "#myTable".
*
* __gc - Userdata finalizer code. When userdata is set to be garbage
* collected, if the metatable has a __gc field pointing to a
* function, that function is first invoked, passing the userdata
* to it. The __gc metamethod is not called for tables.
* (See http://lua-users.org/lists/lua-l/2006-11/msg00508.html)
*
* Special metamethods for redefining standard operators:
* http://www.lua.org/pil/13.1.html
*
* __add "+"
* __sub "-"
* __mul "*"
* __div "/"
* __unm "!"
* __pow "^"
* __concat ".."
*
* Special methods for redfining standar relations
* http://www.lua.org/pil/13.2.html
*
* __eq "=="
* __lt "<"
* __le "<="
*/
/*
*
*
* Class Map
*
*
*/
/* Returns a struct hlua_map if the stack entry "ud" is
* a class session, otherwise it throws an error.
*/
__LJMP static struct map_descriptor *hlua_checkmap(lua_State *L, int ud)
{
return MAY_LJMP(hlua_checkudata(L, ud, class_map_ref));
}
/* This function is the map constructor. It don't need
* the class Map object. It creates and return a new Map
* object. It must be called only during "body" or "init"
* context because it process some filesystem accesses.
*/
__LJMP static int hlua_map_new(struct lua_State *L)
{
const char *fn;
int match = PAT_MATCH_STR;
struct sample_conv conv;
const char *file = "";
int line = 0;
lua_Debug ar;
char *err = NULL;
struct arg args[2];
if (lua_gettop(L) < 1 || lua_gettop(L) > 2)
WILL_LJMP(luaL_error(L, "'new' needs at least 1 argument."));
fn = MAY_LJMP(luaL_checkstring(L, 1));
if (lua_gettop(L) >= 2) {
match = MAY_LJMP(luaL_checkinteger(L, 2));
if (match < 0 || match >= PAT_MATCH_NUM)
WILL_LJMP(luaL_error(L, "'new' needs a valid match method."));
}
/* Get Lua filename and line number. */
if (lua_getstack(L, 1, &ar)) { /* check function at level */
lua_getinfo(L, "Sl", &ar); /* get info about it */
if (ar.currentline > 0) { /* is there info? */
file = ar.short_src;
line = ar.currentline;
}
}
/* fill fake sample_conv struct. */
conv.kw = ""; /* unused. */
conv.process = NULL; /* unused. */
conv.arg_mask = 0; /* unused. */
conv.val_args = NULL; /* unused. */
conv.out_type = SMP_T_STR;
conv.private = (void *)(long)match;
switch (match) {
case PAT_MATCH_STR: conv.in_type = SMP_T_STR; break;
case PAT_MATCH_BEG: conv.in_type = SMP_T_STR; break;
case PAT_MATCH_SUB: conv.in_type = SMP_T_STR; break;
case PAT_MATCH_DIR: conv.in_type = SMP_T_STR; break;
case PAT_MATCH_DOM: conv.in_type = SMP_T_STR; break;
case PAT_MATCH_END: conv.in_type = SMP_T_STR; break;
case PAT_MATCH_REG: conv.in_type = SMP_T_STR; break;
case PAT_MATCH_INT: conv.in_type = SMP_T_SINT; break;
case PAT_MATCH_IP: conv.in_type = SMP_T_ADDR; break;
default:
WILL_LJMP(luaL_error(L, "'new' doesn't support this match mode."));
}
/* fill fake args. */
args[0].type = ARGT_STR;
args[0].data.str.area = (char *)fn;
args[1].type = ARGT_STOP;
/* load the map. */
if (!sample_load_map(args, &conv, file, line, &err)) {
/* error case: we cant use luaL_error because we must
* free the err variable.
*/
luaL_where(L, 1);
lua_pushfstring(L, "'new': %s.", err);
lua_concat(L, 2);
free(err);
WILL_LJMP(lua_error(L));
}
/* create the lua object. */
lua_newtable(L);
lua_pushlightuserdata(L, args[0].data.map);
lua_rawseti(L, -2, 0);
/* Pop a class Map metatable and affect it to the userdata. */
lua_rawgeti(L, LUA_REGISTRYINDEX, class_map_ref);
lua_setmetatable(L, -2);
return 1;
}
__LJMP static inline int _hlua_map_lookup(struct lua_State *L, int str)
{
struct map_descriptor *desc;
struct pattern *pat;
struct sample smp;
MAY_LJMP(check_args(L, 2, "lookup"));
desc = MAY_LJMP(hlua_checkmap(L, 1));
if (desc->pat.expect_type == SMP_T_SINT) {
smp.data.type = SMP_T_SINT;
smp.data.u.sint = MAY_LJMP(luaL_checkinteger(L, 2));
}
else {
smp.data.type = SMP_T_STR;
smp.flags = SMP_F_CONST;
smp.data.u.str.area = (char *)MAY_LJMP(luaL_checklstring(L, 2, (size_t *)&smp.data.u.str.data));
}
pat = pattern_exec_match(&desc->pat, &smp, 1);
if (!pat || !pat->data) {
if (str)
lua_pushstring(L, "");
else
lua_pushnil(L);
return 1;
}
/* The Lua pattern must return a string, so we can't check the returned type */
lua_pushlstring(L, pat->data->u.str.area, pat->data->u.str.data);
return 1;
}
__LJMP static int hlua_map_lookup(struct lua_State *L)
{
return _hlua_map_lookup(L, 0);
}
__LJMP static int hlua_map_slookup(struct lua_State *L)
{
return _hlua_map_lookup(L, 1);
}
/*
*
*
* Class Socket
*
*
*/
__LJMP static struct hlua_socket *hlua_checksocket(lua_State *L, int ud)
{
return MAY_LJMP(hlua_checkudata(L, ud, class_socket_ref));
}
/* This function is the handler called for each I/O on the established
* connection. It is used for notify space avalaible to send or data
* received.
*/
static void hlua_socket_handler(struct appctx *appctx)
{
struct stream_interface *si = appctx->owner;
struct connection *c = cs_conn(objt_cs(si_opposite(si)->end));
if (appctx->ctx.hlua_cosocket.die) {
si_shutw(si);
si_shutr(si);
si_ic(si)->flags |= CF_READ_NULL;
notification_wake(&appctx->ctx.hlua_cosocket.wake_on_read);
notification_wake(&appctx->ctx.hlua_cosocket.wake_on_write);
stream_shutdown(si_strm(si), SF_ERR_KILLED);
}
/* If the connection object is not avalaible, close all the
* streams and wakeup everithing waiting for.
*/
if (!c) {
si_shutw(si);
si_shutr(si);
si_ic(si)->flags |= CF_READ_NULL;
notification_wake(&appctx->ctx.hlua_cosocket.wake_on_read);
notification_wake(&appctx->ctx.hlua_cosocket.wake_on_write);
return;
}
/* If we cant write, wakeup the pending write signals. */
if (channel_output_closed(si_ic(si)))
notification_wake(&appctx->ctx.hlua_cosocket.wake_on_write);
/* If we cant read, wakeup the pending read signals. */
if (channel_input_closed(si_oc(si)))
notification_wake(&appctx->ctx.hlua_cosocket.wake_on_read);
/* if the connection is not estabkished, inform the stream that we want
* to be notified whenever the connection completes.
*/
if (!(c->flags & CO_FL_CONNECTED)) {
si_applet_cant_get(si);
si_applet_cant_put(si);
return;
}
/* This function is called after the connect. */
appctx->ctx.hlua_cosocket.connected = 1;
/* Wake the tasks which wants to write if the buffer have avalaible space. */
if (channel_may_recv(si_ic(si)))
notification_wake(&appctx->ctx.hlua_cosocket.wake_on_write);
/* Wake the tasks which wants to read if the buffer contains data. */
if (!channel_is_empty(si_oc(si)))
notification_wake(&appctx->ctx.hlua_cosocket.wake_on_read);
/* Some data were injected in the buffer, notify the stream
* interface.
*/
if (!channel_is_empty(si_ic(si)))
stream_int_update(si);
/* If write notifications are registered, we considers we want
* to write, so we set the flag cant put
*/
if (notification_registered(&appctx->ctx.hlua_cosocket.wake_on_write))
si_applet_cant_put(si);
}
/* This function is called when the "struct stream" is destroyed.
* Remove the link from the object to this stream.
* Wake all the pending signals.
*/
static void hlua_socket_release(struct appctx *appctx)
{
struct xref *peer;
/* Remove my link in the original object. */
peer = xref_get_peer_and_lock(&appctx->ctx.hlua_cosocket.xref);
if (peer)
xref_disconnect(&appctx->ctx.hlua_cosocket.xref, peer);
/* Wake all the task waiting for me. */
notification_wake(&appctx->ctx.hlua_cosocket.wake_on_read);
notification_wake(&appctx->ctx.hlua_cosocket.wake_on_write);
}
/* If the garbage collectio of the object is launch, nobody
* uses this object. If the stream does not exists, just quit.
* Send the shutdown signal to the stream. In some cases,
* pending signal can rest in the read and write lists. destroy
* it.
*/
__LJMP static int hlua_socket_gc(lua_State *L)
{
struct hlua_socket *socket;
struct appctx *appctx;
struct xref *peer;
MAY_LJMP(check_args(L, 1, "__gc"));
socket = MAY_LJMP(hlua_checksocket(L, 1));
peer = xref_get_peer_and_lock(&socket->xref);
if (!peer)
return 0;
appctx = container_of(peer, struct appctx, ctx.hlua_cosocket.xref);
/* Set the flag which destroy the session. */
appctx->ctx.hlua_cosocket.die = 1;
appctx_wakeup(appctx);
/* Remove all reference between the Lua stack and the coroutine stream. */
xref_disconnect(&socket->xref, peer);
return 0;
}
/* The close function send shutdown signal and break the
* links between the stream and the object.
*/
__LJMP static int hlua_socket_close_helper(lua_State *L)
{
struct hlua_socket *socket;
struct appctx *appctx;
struct xref *peer;
socket = MAY_LJMP(hlua_checksocket(L, 1));
/* Check if we run on the same thread than the xreator thread.
* We cannot access to the socket if the thread is different.
*/
if (socket->tid != tid)
WILL_LJMP(luaL_error(L, "connect: cannot use socket on other thread"));
peer = xref_get_peer_and_lock(&socket->xref);
if (!peer)
return 0;
appctx = container_of(peer, struct appctx, ctx.hlua_cosocket.xref);
/* Set the flag which destroy the session. */
appctx->ctx.hlua_cosocket.die = 1;
appctx_wakeup(appctx);
/* Remove all reference between the Lua stack and the coroutine stream. */
xref_disconnect(&socket->xref, peer);
return 0;
}
/* The close function calls close_helper.
*/
__LJMP static int hlua_socket_close(lua_State *L)
{
MAY_LJMP(check_args(L, 1, "close"));
return hlua_socket_close_helper(L);
}
/* This Lua function assumes that the stack contain three parameters.
* 1 - USERDATA containing a struct socket
* 2 - INTEGER with values of the macro defined below
* If the integer is -1, we must read at most one line.
* If the integer is -2, we ust read all the data until the
* end of the stream.
* If the integer is positive value, we must read a number of
* bytes corresponding to this value.
*/
#define HLSR_READ_LINE (-1)
#define HLSR_READ_ALL (-2)
__LJMP static int hlua_socket_receive_yield(struct lua_State *L, int status, lua_KContext ctx)
{
struct hlua_socket *socket = MAY_LJMP(hlua_checksocket(L, 1));
int wanted = lua_tointeger(L, 2);
struct hlua *hlua = hlua_gethlua(L);
struct appctx *appctx;
size_t len;
int nblk;
const char *blk1;
size_t len1;
const char *blk2;
size_t len2;
int skip_at_end = 0;
struct channel *oc;
struct stream_interface *si;
struct stream *s;
struct xref *peer;
int missing_bytes;
/* Check if this lua stack is schedulable. */
if (!hlua || !hlua->task)
WILL_LJMP(luaL_error(L, "The 'receive' function is only allowed in "
"'frontend', 'backend' or 'task'"));
/* Check if we run on the same thread than the xreator thread.
* We cannot access to the socket if the thread is different.
*/
if (socket->tid != tid)
WILL_LJMP(luaL_error(L, "connect: cannot use socket on other thread"));
/* check for connection break. If some data where read, return it. */
peer = xref_get_peer_and_lock(&socket->xref);
if (!peer)
goto no_peer;
appctx = container_of(peer, struct appctx, ctx.hlua_cosocket.xref);
si = appctx->owner;
s = si_strm(si);
oc = &s->res;
if (wanted == HLSR_READ_LINE) {
/* Read line. */
nblk = co_getline_nc(oc, &blk1, &len1, &blk2, &len2);
if (nblk < 0) /* Connection close. */
goto connection_closed;
if (nblk == 0) /* No data avalaible. */
goto connection_empty;
/* remove final \r\n. */
if (nblk == 1) {
if (blk1[len1-1] == '\n') {
len1--;
skip_at_end++;
if (blk1[len1-1] == '\r') {
len1--;
skip_at_end++;
}
}
}
else {
if (blk2[len2-1] == '\n') {
len2--;
skip_at_end++;
if (blk2[len2-1] == '\r') {
len2--;
skip_at_end++;
}
}
}
}
else if (wanted == HLSR_READ_ALL) {
/* Read all the available data. */
nblk = co_getblk_nc(oc, &blk1, &len1, &blk2, &len2);
if (nblk < 0) /* Connection close. */
goto connection_closed;
if (nblk == 0) /* No data avalaible. */
goto connection_empty;
}
else {
/* Read a block of data. */
nblk = co_getblk_nc(oc, &blk1, &len1, &blk2, &len2);
if (nblk < 0) /* Connection close. */
goto connection_closed;
if (nblk == 0) /* No data avalaible. */
goto connection_empty;
missing_bytes = wanted - socket->b.n;
if (len1 > missing_bytes) {
nblk = 1;
len1 = missing_bytes;
} if (nblk == 2 && len1 + len2 > missing_bytes)
len2 = missing_bytes - len1;
}
len = len1;
luaL_addlstring(&socket->b, blk1, len1);
if (nblk == 2) {
len += len2;
luaL_addlstring(&socket->b, blk2, len2);
}
/* Consume data. */
co_skip(oc, len + skip_at_end);
/* Don't wait anything. */
appctx_wakeup(appctx);
/* If the pattern reclaim to read all the data
* in the connection, got out.
*/
if (wanted == HLSR_READ_ALL)
goto connection_empty;
else if (wanted >= 0 && socket->b.n < wanted)
goto connection_empty;
/* Return result. */
luaL_pushresult(&socket->b);
xref_unlock(&socket->xref, peer);
return 1;
connection_closed:
xref_unlock(&socket->xref, peer);
no_peer:
/* If the buffer containds data. */
if (socket->b.n > 0) {
luaL_pushresult(&socket->b);
return 1;
}
lua_pushnil(L);
lua_pushstring(L, "connection closed.");
return 2;
connection_empty:
if (!notification_new(&hlua->com, &appctx->ctx.hlua_cosocket.wake_on_read, hlua->task)) {
xref_unlock(&socket->xref, peer);
WILL_LJMP(luaL_error(L, "out of memory"));
}
xref_unlock(&socket->xref, peer);
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_socket_receive_yield, TICK_ETERNITY, 0));
return 0;
}
/* This Lua function gets two parameters. The first one can be string
* or a number. If the string is "*l", the user requires one line. If
* the string is "*a", the user requires all the contents of the stream.
* If the value is a number, the user require a number of bytes equal
* to the value. The default value is "*l" (a line).
*
* This parameter with a variable type is converted in integer. This
* integer takes this values:
* -1 : read a line
* -2 : read all the stream
* >0 : amount of bytes.
*
* The second parameter is optional. It contains a string that must be
* concatenated with the read data.
*/
__LJMP static int hlua_socket_receive(struct lua_State *L)
{
int wanted = HLSR_READ_LINE;
const char *pattern;
int type;
char *error;
size_t len;
struct hlua_socket *socket;
if (lua_gettop(L) < 1 || lua_gettop(L) > 3)
WILL_LJMP(luaL_error(L, "The 'receive' function requires between 1 and 3 arguments."));
socket = MAY_LJMP(hlua_checksocket(L, 1));
/* Check if we run on the same thread than the xreator thread.
* We cannot access to the socket if the thread is different.
*/
if (socket->tid != tid)
WILL_LJMP(luaL_error(L, "connect: cannot use socket on other thread"));
/* check for pattern. */
if (lua_gettop(L) >= 2) {
type = lua_type(L, 2);
if (type == LUA_TSTRING) {
pattern = lua_tostring(L, 2);
if (strcmp(pattern, "*a") == 0)
wanted = HLSR_READ_ALL;
else if (strcmp(pattern, "*l") == 0)
wanted = HLSR_READ_LINE;
else {
wanted = strtoll(pattern, &error, 10);
if (*error != '\0')
WILL_LJMP(luaL_error(L, "Unsupported pattern."));
}
}
else if (type == LUA_TNUMBER) {
wanted = lua_tointeger(L, 2);
if (wanted < 0)
WILL_LJMP(luaL_error(L, "Unsupported size."));
}
}
/* Set pattern. */
lua_pushinteger(L, wanted);
/* Check if we would replace the top by itself. */
if (lua_gettop(L) != 2)
lua_replace(L, 2);
/* init buffer, and fill it with prefix. */
luaL_buffinit(L, &socket->b);
/* Check prefix. */
if (lua_gettop(L) >= 3) {
if (lua_type(L, 3) != LUA_TSTRING)
WILL_LJMP(luaL_error(L, "Expect a 'string' for the prefix"));
pattern = lua_tolstring(L, 3, &len);
luaL_addlstring(&socket->b, pattern, len);
}
return __LJMP(hlua_socket_receive_yield(L, 0, 0));
}
/* Write the Lua input string in the output buffer.
* This function returns a yield if no space is available.
*/
static int hlua_socket_write_yield(struct lua_State *L,int status, lua_KContext ctx)
{
struct hlua_socket *socket;
struct hlua *hlua = hlua_gethlua(L);
struct appctx *appctx;
size_t buf_len;
const char *buf;
int len;
int send_len;
int sent;
struct xref *peer;
struct stream_interface *si;
struct stream *s;
/* Check if this lua stack is schedulable. */
if (!hlua || !hlua->task)
WILL_LJMP(luaL_error(L, "The 'write' function is only allowed in "
"'frontend', 'backend' or 'task'"));
/* Get object */
socket = MAY_LJMP(hlua_checksocket(L, 1));
buf = MAY_LJMP(luaL_checklstring(L, 2, &buf_len));
sent = MAY_LJMP(luaL_checkinteger(L, 3));
/* Check if we run on the same thread than the xreator thread.
* We cannot access to the socket if the thread is different.
*/
if (socket->tid != tid)
WILL_LJMP(luaL_error(L, "connect: cannot use socket on other thread"));
/* check for connection break. If some data where read, return it. */
peer = xref_get_peer_and_lock(&socket->xref);
if (!peer) {
lua_pushinteger(L, -1);
return 1;
}
appctx = container_of(peer, struct appctx, ctx.hlua_cosocket.xref);
si = appctx->owner;
s = si_strm(si);
/* Check for connection close. */
if (channel_output_closed(&s->req)) {
xref_unlock(&socket->xref, peer);
lua_pushinteger(L, -1);
return 1;
}
/* Update the input buffer data. */
buf += sent;
send_len = buf_len - sent;
/* All the data are sent. */
if (sent >= buf_len) {
xref_unlock(&socket->xref, peer);
return 1; /* Implicitly return the length sent. */
}
/* Check if the buffer is avalaible because HAProxy doesn't allocate
* the request buffer if its not required.
*/
if (s->req.buf.size == 0) {
if (!channel_alloc_buffer(&s->req, &appctx->buffer_wait))
goto hlua_socket_write_yield_return;
}
/* Check for avalaible space. */
len = b_room(&s->req.buf);
if (len <= 0) {
goto hlua_socket_write_yield_return;
}
/* send data */
if (len < send_len)
send_len = len;
len = ci_putblk(&s->req, buf, send_len);
/* "Not enough space" (-1), "Buffer too little to contain
* the data" (-2) are not expected because the available length
* is tested.
* Other unknown error are also not expected.
*/
if (len <= 0) {
if (len == -1)
s->req.flags |= CF_WAKE_WRITE;
MAY_LJMP(hlua_socket_close_helper(L));
lua_pop(L, 1);
lua_pushinteger(L, -1);
xref_unlock(&socket->xref, peer);
return 1;
}
/* update buffers. */
appctx_wakeup(appctx);
s->req.rex = TICK_ETERNITY;
s->res.wex = TICK_ETERNITY;
/* Update length sent. */
lua_pop(L, 1);
lua_pushinteger(L, sent + len);
/* All the data buffer is sent ? */
if (sent + len >= buf_len) {
xref_unlock(&socket->xref, peer);
return 1;
}
hlua_socket_write_yield_return:
if (!notification_new(&hlua->com, &appctx->ctx.hlua_cosocket.wake_on_write, hlua->task)) {
xref_unlock(&socket->xref, peer);
WILL_LJMP(luaL_error(L, "out of memory"));
}
xref_unlock(&socket->xref, peer);
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_socket_write_yield, TICK_ETERNITY, 0));
return 0;
}
/* This function initiate the send of data. It just check the input
* parameters and push an integer in the Lua stack that contain the
* amount of data writed in the buffer. This is used by the function
* "hlua_socket_write_yield" that can yield.
*
* The Lua function gets between 3 and 4 parameters. The first one is
* the associated object. The second is a string buffer. The third is
* a facultative integer that represents where is the buffer position
* of the start of the data that can send. The first byte is the
* position "1". The default value is "1". The fourth argument is a
* facultative integer that represents where is the buffer position
* of the end of the data that can send. The default is the last byte.
*/
static int hlua_socket_send(struct lua_State *L)
{
int i;
int j;
const char *buf;
size_t buf_len;
/* Check number of arguments. */
if (lua_gettop(L) < 2 || lua_gettop(L) > 4)
WILL_LJMP(luaL_error(L, "'send' needs between 2 and 4 arguments"));
/* Get the string. */
buf = MAY_LJMP(luaL_checklstring(L, 2, &buf_len));
/* Get and check j. */
if (lua_gettop(L) == 4) {
j = MAY_LJMP(luaL_checkinteger(L, 4));
if (j < 0)
j = buf_len + j + 1;
if (j > buf_len)
j = buf_len + 1;
lua_pop(L, 1);
}
else
j = buf_len;
/* Get and check i. */
if (lua_gettop(L) == 3) {
i = MAY_LJMP(luaL_checkinteger(L, 3));
if (i < 0)
i = buf_len + i + 1;
if (i > buf_len)
i = buf_len + 1;
lua_pop(L, 1);
} else
i = 1;
/* Check bth i and j. */
if (i > j) {
lua_pushinteger(L, 0);
return 1;
}
if (i == 0 && j == 0) {
lua_pushinteger(L, 0);
return 1;
}
if (i == 0)
i = 1;
if (j == 0)
j = 1;
/* Pop the string. */
lua_pop(L, 1);
/* Update the buffer length. */
buf += i - 1;
buf_len = j - i + 1;
lua_pushlstring(L, buf, buf_len);
/* This unsigned is used to remember the amount of sent data. */
lua_pushinteger(L, 0);
return MAY_LJMP(hlua_socket_write_yield(L, 0, 0));
}
#define SOCKET_INFO_MAX_LEN sizeof("[0000:0000:0000:0000:0000:0000:0000:0000]:12345")
__LJMP static inline int hlua_socket_info(struct lua_State *L, struct sockaddr_storage *addr)
{
static char buffer[SOCKET_INFO_MAX_LEN];
int ret;
int len;
char *p;
ret = addr_to_str(addr, buffer+1, SOCKET_INFO_MAX_LEN-1);
if (ret <= 0) {
lua_pushnil(L);
return 1;
}
if (ret == AF_UNIX) {
lua_pushstring(L, buffer+1);
return 1;
}
else if (ret == AF_INET6) {
buffer[0] = '[';
len = strlen(buffer);
buffer[len] = ']';
len++;
buffer[len] = ':';
len++;
p = buffer;
}
else if (ret == AF_INET) {
p = buffer + 1;
len = strlen(p);
p[len] = ':';
len++;
}
else {
lua_pushnil(L);
return 1;
}
if (port_to_str(addr, p + len, SOCKET_INFO_MAX_LEN-1 - len) <= 0) {
lua_pushnil(L);
return 1;
}
lua_pushstring(L, p);
return 1;
}
/* Returns information about the peer of the connection. */
__LJMP static int hlua_socket_getpeername(struct lua_State *L)
{
struct hlua_socket *socket;
struct connection *conn;
struct xref *peer;
struct appctx *appctx;
struct stream_interface *si;
struct stream *s;
int ret;
MAY_LJMP(check_args(L, 1, "getpeername"));
socket = MAY_LJMP(hlua_checksocket(L, 1));
/* Check if we run on the same thread than the xreator thread.
* We cannot access to the socket if the thread is different.
*/
if (socket->tid != tid)
WILL_LJMP(luaL_error(L, "connect: cannot use socket on other thread"));
/* check for connection break. If some data where read, return it. */
peer = xref_get_peer_and_lock(&socket->xref);
if (!peer) {
lua_pushnil(L);
return 1;
}
appctx = container_of(peer, struct appctx, ctx.hlua_cosocket.xref);
si = appctx->owner;
s = si_strm(si);
conn = cs_conn(objt_cs(s->si[1].end));
if (!conn) {
xref_unlock(&socket->xref, peer);
lua_pushnil(L);
return 1;
}
conn_get_to_addr(conn);
if (!(conn->flags & CO_FL_ADDR_TO_SET)) {
xref_unlock(&socket->xref, peer);
lua_pushnil(L);
return 1;
}
ret = MAY_LJMP(hlua_socket_info(L, &conn->addr.to));
xref_unlock(&socket->xref, peer);
return ret;
}
/* Returns information about my connection side. */
static int hlua_socket_getsockname(struct lua_State *L)
{
struct hlua_socket *socket;
struct connection *conn;
struct appctx *appctx;
struct xref *peer;
struct stream_interface *si;
struct stream *s;
int ret;
MAY_LJMP(check_args(L, 1, "getsockname"));
socket = MAY_LJMP(hlua_checksocket(L, 1));
/* Check if we run on the same thread than the xreator thread.
* We cannot access to the socket if the thread is different.
*/
if (socket->tid != tid)
WILL_LJMP(luaL_error(L, "connect: cannot use socket on other thread"));
/* check for connection break. If some data where read, return it. */
peer = xref_get_peer_and_lock(&socket->xref);
if (!peer) {
lua_pushnil(L);
return 1;
}
appctx = container_of(peer, struct appctx, ctx.hlua_cosocket.xref);
si = appctx->owner;
s = si_strm(si);
conn = cs_conn(objt_cs(s->si[1].end));
if (!conn) {
xref_unlock(&socket->xref, peer);
lua_pushnil(L);
return 1;
}
conn_get_from_addr(conn);
if (!(conn->flags & CO_FL_ADDR_FROM_SET)) {
xref_unlock(&socket->xref, peer);
lua_pushnil(L);
return 1;
}
ret = hlua_socket_info(L, &conn->addr.from);
xref_unlock(&socket->xref, peer);
return ret;
}
/* This struct define the applet. */
static struct applet update_applet = {
.obj_type = OBJ_TYPE_APPLET,
.name = "<LUA_TCP>",
.fct = hlua_socket_handler,
.release = hlua_socket_release,
};
__LJMP static int hlua_socket_connect_yield(struct lua_State *L, int status, lua_KContext ctx)
{
struct hlua_socket *socket = MAY_LJMP(hlua_checksocket(L, 1));
struct hlua *hlua = hlua_gethlua(L);
struct xref *peer;
struct appctx *appctx;
struct stream_interface *si;
struct stream *s;
/* Check if we run on the same thread than the xreator thread.
* We cannot access to the socket if the thread is different.
*/
if (socket->tid != tid)
WILL_LJMP(luaL_error(L, "connect: cannot use socket on other thread"));
/* check for connection break. If some data where read, return it. */
peer = xref_get_peer_and_lock(&socket->xref);
if (!peer) {
lua_pushnil(L);
lua_pushstring(L, "Can't connect");
return 2;
}
appctx = container_of(peer, struct appctx, ctx.hlua_cosocket.xref);
si = appctx->owner;
s = si_strm(si);
/* Check if we run on the same thread than the xreator thread.
* We cannot access to the socket if the thread is different.
*/
if (socket->tid != tid) {
xref_unlock(&socket->xref, peer);
WILL_LJMP(luaL_error(L, "connect: cannot use socket on other thread"));
}
/* Check for connection close. */
if (!hlua || channel_output_closed(&s->req)) {
xref_unlock(&socket->xref, peer);
lua_pushnil(L);
lua_pushstring(L, "Can't connect");
return 2;
}
appctx = objt_appctx(s->si[0].end);
/* Check for connection established. */
if (appctx->ctx.hlua_cosocket.connected) {
xref_unlock(&socket->xref, peer);
lua_pushinteger(L, 1);
return 1;
}
if (!notification_new(&hlua->com, &appctx->ctx.hlua_cosocket.wake_on_write, hlua->task)) {
xref_unlock(&socket->xref, peer);
WILL_LJMP(luaL_error(L, "out of memory error"));
}
xref_unlock(&socket->xref, peer);
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_socket_connect_yield, TICK_ETERNITY, 0));
return 0;
}
/* This function fail or initite the connection. */
__LJMP static int hlua_socket_connect(struct lua_State *L)
{
struct hlua_socket *socket;
int port = -1;
const char *ip;
struct connection *conn;
struct hlua *hlua;
struct appctx *appctx;
int low, high;
struct sockaddr_storage *addr;
struct xref *peer;
struct stream_interface *si;
struct stream *s;
if (lua_gettop(L) < 2)
WILL_LJMP(luaL_error(L, "connect: need at least 2 arguments"));
/* Get args. */
socket = MAY_LJMP(hlua_checksocket(L, 1));
/* Check if we run on the same thread than the xreator thread.
* We cannot access to the socket if the thread is different.
*/
if (socket->tid != tid)
WILL_LJMP(luaL_error(L, "connect: cannot use socket on other thread"));
ip = MAY_LJMP(luaL_checkstring(L, 2));
if (lua_gettop(L) >= 3) {
luaL_Buffer b;
port = MAY_LJMP(luaL_checkinteger(L, 3));
/* Force the ip to end with a colon, to support IPv6 addresses
* that are not enclosed within square brackets.
*/
if (port > 0) {
luaL_buffinit(L, &b);
luaL_addstring(&b, ip);
luaL_addchar(&b, ':');
luaL_pushresult(&b);
ip = lua_tolstring(L, lua_gettop(L), NULL);
}
}
/* check for connection break. If some data where read, return it. */
peer = xref_get_peer_and_lock(&socket->xref);
if (!peer) {
lua_pushnil(L);
return 1;
}
appctx = container_of(peer, struct appctx, ctx.hlua_cosocket.xref);
si = appctx->owner;
s = si_strm(si);
/* Initialise connection. */
conn = cs_conn(si_alloc_cs(&s->si[1], NULL));
if (!conn) {
xref_unlock(&socket->xref, peer);
WILL_LJMP(luaL_error(L, "connect: internal error"));
}
/* needed for the connection not to be closed */
conn->target = s->target;
/* Parse ip address. */
addr = str2sa_range(ip, NULL, &low, &high, NULL, NULL, NULL, 0);
if (!addr) {
xref_unlock(&socket->xref, peer);
WILL_LJMP(luaL_error(L, "connect: cannot parse destination address '%s'", ip));
}
if (low != high) {
xref_unlock(&socket->xref, peer);
WILL_LJMP(luaL_error(L, "connect: port ranges not supported : address '%s'", ip));
}
memcpy(&conn->addr.to, addr, sizeof(struct sockaddr_storage));
/* Set port. */
if (low == 0) {
if (conn->addr.to.ss_family == AF_INET) {
if (port == -1) {
xref_unlock(&socket->xref, peer);
WILL_LJMP(luaL_error(L, "connect: port missing"));
}
((struct sockaddr_in *)&conn->addr.to)->sin_port = htons(port);
} else if (conn->addr.to.ss_family == AF_INET6) {
if (port == -1) {
xref_unlock(&socket->xref, peer);
WILL_LJMP(luaL_error(L, "connect: port missing"));
}
((struct sockaddr_in6 *)&conn->addr.to)->sin6_port = htons(port);
}
}
hlua = hlua_gethlua(L);
appctx = objt_appctx(s->si[0].end);
/* inform the stream that we want to be notified whenever the
* connection completes.
*/
si_applet_cant_get(&s->si[0]);
si_applet_cant_put(&s->si[0]);
appctx_wakeup(appctx);
hlua->flags |= HLUA_MUST_GC;
if (!notification_new(&hlua->com, &appctx->ctx.hlua_cosocket.wake_on_write, hlua->task)) {
xref_unlock(&socket->xref, peer);
WILL_LJMP(luaL_error(L, "out of memory"));
}
xref_unlock(&socket->xref, peer);
task_wakeup(s->task, TASK_WOKEN_INIT);
/* Return yield waiting for connection. */
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_socket_connect_yield, TICK_ETERNITY, 0));
return 0;
}
#ifdef USE_OPENSSL
__LJMP static int hlua_socket_connect_ssl(struct lua_State *L)
{
struct hlua_socket *socket;
struct xref *peer;
struct appctx *appctx;
struct stream_interface *si;
struct stream *s;
MAY_LJMP(check_args(L, 3, "connect_ssl"));
socket = MAY_LJMP(hlua_checksocket(L, 1));
/* check for connection break. If some data where read, return it. */
peer = xref_get_peer_and_lock(&socket->xref);
if (!peer) {
lua_pushnil(L);
return 1;
}
appctx = container_of(peer, struct appctx, ctx.hlua_cosocket.xref);
si = appctx->owner;
s = si_strm(si);
s->target = &socket_ssl.obj_type;
xref_unlock(&socket->xref, peer);
return MAY_LJMP(hlua_socket_connect(L));
}
#endif
__LJMP static int hlua_socket_setoption(struct lua_State *L)
{
return 0;
}
__LJMP static int hlua_socket_settimeout(struct lua_State *L)
{
struct hlua_socket *socket;
int tmout;
double dtmout;
struct xref *peer;
struct appctx *appctx;
struct stream_interface *si;
struct stream *s;
MAY_LJMP(check_args(L, 2, "settimeout"));
socket = MAY_LJMP(hlua_checksocket(L, 1));
/* convert the timeout to millis */
dtmout = MAY_LJMP(luaL_checknumber(L, 2)) * 1000;
/* Check for negative values */
if (dtmout < 0)
WILL_LJMP(luaL_error(L, "settimeout: cannot set negatives values"));
if (dtmout > INT_MAX) /* overflow check */
WILL_LJMP(luaL_error(L, "settimeout: cannot set values larger than %d ms", INT_MAX));
tmout = MS_TO_TICKS((int)dtmout);
if (tmout == 0)
tmout++; /* very small timeouts are adjusted to a minium of 1ms */
/* Check if we run on the same thread than the xreator thread.
* We cannot access to the socket if the thread is different.
*/
if (socket->tid != tid)
WILL_LJMP(luaL_error(L, "connect: cannot use socket on other thread"));
/* check for connection break. If some data were read, return it. */
peer = xref_get_peer_and_lock(&socket->xref);
if (!peer) {
hlua_pusherror(L, "socket: not yet initialised, you can't set timeouts.");
WILL_LJMP(lua_error(L));
return 0;
}
appctx = container_of(peer, struct appctx, ctx.hlua_cosocket.xref);
si = appctx->owner;
s = si_strm(si);
s->sess->fe->timeout.connect = tmout;
s->req.rto = tmout;
s->req.wto = tmout;
s->res.rto = tmout;
s->res.wto = tmout;
s->req.rex = tick_add_ifset(now_ms, tmout);
s->req.wex = tick_add_ifset(now_ms, tmout);
s->res.rex = tick_add_ifset(now_ms, tmout);
s->res.wex = tick_add_ifset(now_ms, tmout);
s->task->expire = tick_add_ifset(now_ms, tmout);
task_queue(s->task);
xref_unlock(&socket->xref, peer);
lua_pushinteger(L, 1);
return 1;
}
__LJMP static int hlua_socket_new(lua_State *L)
{
struct hlua_socket *socket;
struct appctx *appctx;
struct session *sess;
struct stream *strm;
/* Check stack size. */
if (!lua_checkstack(L, 3)) {
hlua_pusherror(L, "socket: full stack");
goto out_fail_conf;
}
/* Create the object: obj[0] = userdata. */
lua_newtable(L);
socket = MAY_LJMP(lua_newuserdata(L, sizeof(*socket)));
lua_rawseti(L, -2, 0);
memset(socket, 0, sizeof(*socket));
socket->tid = tid;
/* Check if the various memory pools are intialized. */
if (!pool_head_stream || !pool_head_buffer) {
hlua_pusherror(L, "socket: uninitialized pools.");
goto out_fail_conf;
}
/* Pop a class stream metatable and affect it to the userdata. */
lua_rawgeti(L, LUA_REGISTRYINDEX, class_socket_ref);
lua_setmetatable(L, -2);
/* Create the applet context */
appctx = appctx_new(&update_applet, tid_bit);
if (!appctx) {
hlua_pusherror(L, "socket: out of memory");
goto out_fail_conf;
}
appctx->ctx.hlua_cosocket.connected = 0;
appctx->ctx.hlua_cosocket.die = 0;
LIST_INIT(&appctx->ctx.hlua_cosocket.wake_on_write);
LIST_INIT(&appctx->ctx.hlua_cosocket.wake_on_read);
/* Now create a session, task and stream for this applet */
sess = session_new(&socket_proxy, NULL, &appctx->obj_type);
if (!sess) {
hlua_pusherror(L, "socket: out of memory");
goto out_fail_sess;
}
strm = stream_new(sess, &appctx->obj_type);
if (!strm) {
hlua_pusherror(L, "socket: out of memory");
goto out_fail_stream;
}
/* Initialise cross reference between stream and Lua socket object. */
xref_create(&socket->xref, &appctx->ctx.hlua_cosocket.xref);
/* Configure "right" stream interface. this "si" is used to connect
* and retrieve data from the server. The connection is initialized
* with the "struct server".
*/
si_set_state(&strm->si[1], SI_ST_ASS);
/* Force destination server. */
strm->flags |= SF_DIRECT | SF_ASSIGNED | SF_ADDR_SET | SF_BE_ASSIGNED;
strm->target = &socket_tcp.obj_type;
return 1;
out_fail_stream:
session_free(sess);
out_fail_sess:
appctx_free(appctx);
out_fail_conf:
WILL_LJMP(lua_error(L));
return 0;
}
/*
*
*
* Class Channel
*
*
*/
/* The state between the channel data and the HTTP parser state can be
* unconsistent, so reset the parser and call it again. Warning, this
* action not revalidate the request and not send a 400 if the modified
* resuest is not valid.
*
* This function never fails. The direction is set using dir, which equals
* either SMP_OPT_DIR_REQ or SMP_OPT_DIR_RES.
*/
static void hlua_resynchonize_proto(struct stream *stream, int dir)
{
/* Protocol HTTP. */
if (stream->be->mode == PR_MODE_HTTP) {
if (dir == SMP_OPT_DIR_REQ)
http_txn_reset_req(stream->txn);
else if (dir == SMP_OPT_DIR_RES)
http_txn_reset_res(stream->txn);
if (stream->txn->hdr_idx.v)
hdr_idx_init(&stream->txn->hdr_idx);
if (dir == SMP_OPT_DIR_REQ)
http_msg_analyzer(&stream->txn->req, &stream->txn->hdr_idx);
else if (dir == SMP_OPT_DIR_RES)
http_msg_analyzer(&stream->txn->rsp, &stream->txn->hdr_idx);
}
}
/* This function is called before the Lua execution. It stores
* the differents parsers state before executing some Lua code.
*/
static inline void consistency_set(struct stream *stream, int opt, struct hlua_consistency *c)
{
c->mode = stream->be->mode;
switch (c->mode) {
case PR_MODE_HTTP:
c->data.http.dir = opt & SMP_OPT_DIR;
if (c->data.http.dir == SMP_OPT_DIR_REQ)
c->data.http.state = stream->txn->req.msg_state;
else
c->data.http.state = stream->txn->rsp.msg_state;
break;
default:
break;
}
}
/* This function is called after the Lua execution. it
* returns true if the parser state is consistent, otherwise,
* it return false.
*
* In HTTP mode, the parser state must be in the same state
* or greater when we exit the function. Even if we do a
* control yield. This prevent to break the HTTP message
* from the Lua code.
*/
static inline int consistency_check(struct stream *stream, int opt, struct hlua_consistency *c)
{
if (c->mode != stream->be->mode)
return 0;
switch (c->mode) {
case PR_MODE_HTTP:
if (c->data.http.dir != (opt & SMP_OPT_DIR))
return 0;
if (c->data.http.dir == SMP_OPT_DIR_REQ)
return stream->txn->req.msg_state >= c->data.http.state;
else
return stream->txn->rsp.msg_state >= c->data.http.state;
default:
return 1;
}
return 1;
}
/* Returns the struct hlua_channel join to the class channel in the
* stack entry "ud" or throws an argument error.
*/
__LJMP static struct channel *hlua_checkchannel(lua_State *L, int ud)
{
return MAY_LJMP(hlua_checkudata(L, ud, class_channel_ref));
}
/* Pushes the channel onto the top of the stack. If the stask does not have a
* free slots, the function fails and returns 0;
*/
static int hlua_channel_new(lua_State *L, struct channel *channel)
{
/* Check stack size. */
if (!lua_checkstack(L, 3))
return 0;
lua_newtable(L);
lua_pushlightuserdata(L, channel);
lua_rawseti(L, -2, 0);
/* Pop a class sesison metatable and affect it to the userdata. */
lua_rawgeti(L, LUA_REGISTRYINDEX, class_channel_ref);
lua_setmetatable(L, -2);
return 1;
}
/* Duplicate all the data present in the input channel and put it
* in a string LUA variables. Returns -1 and push a nil value in
* the stack if the channel is closed and all the data are consumed,
* returns 0 if no data are available, otherwise it returns the length
* of the builded string.
*/
static inline int _hlua_channel_dup(struct channel *chn, lua_State *L)
{
char *blk1;
char *blk2;
size_t len1;
size_t len2;
int ret;
luaL_Buffer b;
ret = ci_getblk_nc(chn, &blk1, &len1, &blk2, &len2);
if (unlikely(ret == 0))
return 0;
if (unlikely(ret < 0)) {
lua_pushnil(L);
return -1;
}
luaL_buffinit(L, &b);
luaL_addlstring(&b, blk1, len1);
if (unlikely(ret == 2))
luaL_addlstring(&b, blk2, len2);
luaL_pushresult(&b);
if (unlikely(ret == 2))
return len1 + len2;
return len1;
}
/* "_hlua_channel_dup" wrapper. If no data are available, it returns
* a yield. This function keep the data in the buffer.
*/
__LJMP static int hlua_channel_dup_yield(lua_State *L, int status, lua_KContext ctx)
{
struct channel *chn;
chn = MAY_LJMP(hlua_checkchannel(L, 1));
if (_hlua_channel_dup(chn, L) == 0)
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_channel_dup_yield, TICK_ETERNITY, 0));
return 1;
}
/* Check arguments for the function "hlua_channel_dup_yield". */
__LJMP static int hlua_channel_dup(lua_State *L)
{
MAY_LJMP(check_args(L, 1, "dup"));
MAY_LJMP(hlua_checkchannel(L, 1));
return MAY_LJMP(hlua_channel_dup_yield(L, 0, 0));
}
/* "_hlua_channel_dup" wrapper. If no data are available, it returns
* a yield. This function consumes the data in the buffer. It returns
* a string containing the data or a nil pointer if no data are available
* and the channel is closed.
*/
__LJMP static int hlua_channel_get_yield(lua_State *L, int status, lua_KContext ctx)
{
struct channel *chn;
int ret;
chn = MAY_LJMP(hlua_checkchannel(L, 1));
ret = _hlua_channel_dup(chn, L);
if (unlikely(ret == 0))
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_channel_get_yield, TICK_ETERNITY, 0));
if (unlikely(ret == -1))
return 1;
b_sub(&chn->buf, ret);
hlua_resynchonize_proto(chn_strm(chn), !!(chn->flags & CF_ISRESP));
return 1;
}
/* Check arguments for the fucntion "hlua_channel_get_yield". */
__LJMP static int hlua_channel_get(lua_State *L)
{
MAY_LJMP(check_args(L, 1, "get"));
MAY_LJMP(hlua_checkchannel(L, 1));
return MAY_LJMP(hlua_channel_get_yield(L, 0, 0));
}
/* This functions consumes and returns one line. If the channel is closed,
* and the last data does not contains a final '\n', the data are returned
* without the final '\n'. When no more data are avalaible, it returns nil
* value.
*/
__LJMP static int hlua_channel_getline_yield(lua_State *L, int status, lua_KContext ctx)
{
char *blk1;
char *blk2;
size_t len1;
size_t len2;
size_t len;
struct channel *chn;
int ret;
luaL_Buffer b;
chn = MAY_LJMP(hlua_checkchannel(L, 1));
ret = ci_getline_nc(chn, &blk1, &len1, &blk2, &len2);
if (ret == 0)
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_channel_getline_yield, TICK_ETERNITY, 0));
if (ret == -1) {
lua_pushnil(L);
return 1;
}
luaL_buffinit(L, &b);
luaL_addlstring(&b, blk1, len1);
len = len1;
if (unlikely(ret == 2)) {
luaL_addlstring(&b, blk2, len2);
len += len2;
}
luaL_pushresult(&b);
b_rep_blk(&chn->buf, ci_head(chn), ci_head(chn) + len, NULL, 0);
hlua_resynchonize_proto(chn_strm(chn), !!(chn->flags & CF_ISRESP));
return 1;
}
/* Check arguments for the fucntion "hlua_channel_getline_yield". */
__LJMP static int hlua_channel_getline(lua_State *L)
{
MAY_LJMP(check_args(L, 1, "getline"));
MAY_LJMP(hlua_checkchannel(L, 1));
return MAY_LJMP(hlua_channel_getline_yield(L, 0, 0));
}
/* This function takes a string as input, and append it at the
* input side of channel. If the data is too big, but a space
* is probably available after sending some data, the function
* yield. If the data is bigger than the buffer, or if the
* channel is closed, it returns -1. otherwise, it returns the
* amount of data writed.
*/
__LJMP static int hlua_channel_append_yield(lua_State *L, int status, lua_KContext ctx)
{
struct channel *chn = MAY_LJMP(hlua_checkchannel(L, 1));
size_t len;
const char *str = MAY_LJMP(luaL_checklstring(L, 2, &len));
int l = MAY_LJMP(luaL_checkinteger(L, 3));
int ret;
int max;
/* Check if the buffer is avalaible because HAProxy doesn't allocate
* the request buffer if its not required.
*/
if (chn->buf.size == 0) {
si_applet_cant_put(chn_prod(chn));
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_channel_append_yield, TICK_ETERNITY, 0));
}
max = channel_recv_limit(chn) - b_data(&chn->buf);
if (max > len - l)
max = len - l;
ret = ci_putblk(chn, str + l, max);
if (ret == -2 || ret == -3) {
lua_pushinteger(L, -1);
return 1;
}
if (ret == -1) {
chn->flags |= CF_WAKE_WRITE;
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_channel_append_yield, TICK_ETERNITY, 0));
}
l += ret;
lua_pop(L, 1);
lua_pushinteger(L, l);
hlua_resynchonize_proto(chn_strm(chn), !!(chn->flags & CF_ISRESP));
max = channel_recv_limit(chn) - b_data(&chn->buf);
if (max == 0 && co_data(chn) == 0) {
/* There are no space avalaible, and the output buffer is empty.
* in this case, we cannot add more data, so we cannot yield,
* we return the amount of copyied data.
*/
return 1;
}
if (l < len)
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_channel_append_yield, TICK_ETERNITY, 0));
return 1;
}
/* just a wrapper of "hlua_channel_append_yield". It returns the length
* of the writed string, or -1 if the channel is closed or if the
* buffer size is too little for the data.
*/
__LJMP static int hlua_channel_append(lua_State *L)
{
size_t len;
MAY_LJMP(check_args(L, 2, "append"));
MAY_LJMP(hlua_checkchannel(L, 1));
MAY_LJMP(luaL_checklstring(L, 2, &len));
MAY_LJMP(luaL_checkinteger(L, 3));
lua_pushinteger(L, 0);
return MAY_LJMP(hlua_channel_append_yield(L, 0, 0));
}
/* just a wrapper of "hlua_channel_append_yield". This wrapper starts
* his process by cleaning the buffer. The result is a replacement
* of the current data. It returns the length of the writed string,
* or -1 if the channel is closed or if the buffer size is too
* little for the data.
*/
__LJMP static int hlua_channel_set(lua_State *L)
{
struct channel *chn;
MAY_LJMP(check_args(L, 2, "set"));
chn = MAY_LJMP(hlua_checkchannel(L, 1));
lua_pushinteger(L, 0);
b_set_data(&chn->buf, co_data(chn));
return MAY_LJMP(hlua_channel_append_yield(L, 0, 0));
}
/* Append data in the output side of the buffer. This data is immediatly
* sent. The fcuntion returns the ammount of data writed. If the buffer
* cannot contains the data, the function yield. The function returns -1
* if the channel is closed.
*/
__LJMP static int hlua_channel_send_yield(lua_State *L, int status, lua_KContext ctx)
{
struct channel *chn = MAY_LJMP(hlua_checkchannel(L, 1));
size_t len;
const char *str = MAY_LJMP(luaL_checklstring(L, 2, &len));
int l = MAY_LJMP(luaL_checkinteger(L, 3));
int max;
struct hlua *hlua = hlua_gethlua(L);
if (unlikely(channel_output_closed(chn))) {
lua_pushinteger(L, -1);
return 1;
}
/* Check if the buffer is avalaible because HAProxy doesn't allocate
* the request buffer if its not required.
*/
if (chn->buf.size == 0) {
si_applet_cant_put(chn_prod(chn));
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_channel_send_yield, TICK_ETERNITY, 0));
}
/* the writed data will be immediatly sent, so we can check
* the avalaible space without taking in account the reserve.
* The reserve is guaranted for the processing of incoming
* data, because the buffer will be flushed.
*/
max = b_room(&chn->buf);
/* If there are no space avalaible, and the output buffer is empty.
* in this case, we cannot add more data, so we cannot yield,
* we return the amount of copyied data.
*/
if (max == 0 && co_data(chn) == 0)
return 1;
/* Adjust the real required length. */
if (max > len - l)
max = len - l;
/* The buffer avalaible size may be not contiguous. This test
* detects a non contiguous buffer and realign it.
*/
if (ci_space_for_replace(chn) < max)
channel_slow_realign(chn, trash.area);
/* Copy input data in the buffer. */
max = b_rep_blk(&chn->buf, ci_head(chn), ci_head(chn), str + l, max);
/* buffer replace considers that the input part is filled.
* so, I must forward these new data in the output part.
*/
c_adv(chn, max);
l += max;
lua_pop(L, 1);
lua_pushinteger(L, l);
/* If there are no space avalaible, and the output buffer is empty.
* in this case, we cannot add more data, so we cannot yield,
* we return the amount of copyied data.
*/
max = b_room(&chn->buf);
if (max == 0 && co_data(chn) == 0)
return 1;
if (l < len) {
/* If we are waiting for space in the response buffer, we
* must set the flag WAKERESWR. This flag required the task
* wake up if any activity is detected on the response buffer.
*/
if (chn->flags & CF_ISRESP)
HLUA_SET_WAKERESWR(hlua);
else
HLUA_SET_WAKEREQWR(hlua);
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_channel_send_yield, TICK_ETERNITY, 0));
}
return 1;
}
/* Just a wraper of "_hlua_channel_send". This wrapper permits
* yield the LUA process, and resume it without checking the
* input arguments.
*/
__LJMP static int hlua_channel_send(lua_State *L)
{
MAY_LJMP(check_args(L, 2, "send"));
lua_pushinteger(L, 0);
return MAY_LJMP(hlua_channel_send_yield(L, 0, 0));
}
/* This function forward and amount of butes. The data pass from
* the input side of the buffer to the output side, and can be
* forwarded. This function never fails.
*
* The Lua function takes an amount of bytes to be forwarded in
* imput. It returns the number of bytes forwarded.
*/
__LJMP static int hlua_channel_forward_yield(lua_State *L, int status, lua_KContext ctx)
{
struct channel *chn;
int len;
int l;
int max;
struct hlua *hlua = hlua_gethlua(L);
chn = MAY_LJMP(hlua_checkchannel(L, 1));
len = MAY_LJMP(luaL_checkinteger(L, 2));
l = MAY_LJMP(luaL_checkinteger(L, -1));
max = len - l;
if (max > ci_data(chn))
max = ci_data(chn);
channel_forward(chn, max);
l += max;
lua_pop(L, 1);
lua_pushinteger(L, l);
/* Check if it miss bytes to forward. */
if (l < len) {
/* The the input channel or the output channel are closed, we
* must return the amount of data forwarded.
*/
if (channel_input_closed(chn) || channel_output_closed(chn))
return 1;
/* If we are waiting for space data in the response buffer, we
* must set the flag WAKERESWR. This flag required the task
* wake up if any activity is detected on the response buffer.
*/
if (chn->flags & CF_ISRESP)
HLUA_SET_WAKERESWR(hlua);
else
HLUA_SET_WAKEREQWR(hlua);
/* Otherwise, we can yield waiting for new data in the inpout side. */
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_channel_forward_yield, TICK_ETERNITY, 0));
}
return 1;
}
/* Just check the input and prepare the stack for the previous
* function "hlua_channel_forward_yield"
*/
__LJMP static int hlua_channel_forward(lua_State *L)
{
MAY_LJMP(check_args(L, 2, "forward"));
MAY_LJMP(hlua_checkchannel(L, 1));
MAY_LJMP(luaL_checkinteger(L, 2));
lua_pushinteger(L, 0);
return MAY_LJMP(hlua_channel_forward_yield(L, 0, 0));
}
/* Just returns the number of bytes available in the input
* side of the buffer. This function never fails.
*/
__LJMP static int hlua_channel_get_in_len(lua_State *L)
{
struct channel *chn;
MAY_LJMP(check_args(L, 1, "get_in_len"));
chn = MAY_LJMP(hlua_checkchannel(L, 1));
lua_pushinteger(L, ci_data(chn));
return 1;
}
/* Returns true if the channel is full. */
__LJMP static int hlua_channel_is_full(lua_State *L)
{
struct channel *chn;
int rem;
MAY_LJMP(check_args(L, 1, "is_full"));
chn = MAY_LJMP(hlua_checkchannel(L, 1));
rem = b_room(&chn->buf);
rem -= global.tune.maxrewrite; /* Rewrite reserved size */
lua_pushboolean(L, rem <= 0);
return 1;
}
/* Just returns the number of bytes available in the output
* side of the buffer. This function never fails.
*/
__LJMP static int hlua_channel_get_out_len(lua_State *L)
{
struct channel *chn;
MAY_LJMP(check_args(L, 1, "get_out_len"));
chn = MAY_LJMP(hlua_checkchannel(L, 1));
lua_pushinteger(L, co_data(chn));
return 1;
}
/*
*
*
* Class Fetches
*
*
*/
/* Returns a struct hlua_session if the stack entry "ud" is
* a class stream, otherwise it throws an error.
*/
__LJMP static struct hlua_smp *hlua_checkfetches(lua_State *L, int ud)
{
return MAY_LJMP(hlua_checkudata(L, ud, class_fetches_ref));
}
/* This function creates and push in the stack a fetch object according
* with a current TXN.
*/
static int hlua_fetches_new(lua_State *L, struct hlua_txn *txn, unsigned int flags)
{
struct hlua_smp *hsmp;
/* Check stack size. */
if (!lua_checkstack(L, 3))
return 0;
/* Create the object: obj[0] = userdata.
* Note that the base of the Fetches object is the
* transaction object.
*/
lua_newtable(L);
hsmp = lua_newuserdata(L, sizeof(*hsmp));
lua_rawseti(L, -2, 0);
hsmp->s = txn->s;
hsmp->p = txn->p;
hsmp->dir = txn->dir;
hsmp->flags = flags;
/* Pop a class sesison metatable and affect it to the userdata. */
lua_rawgeti(L, LUA_REGISTRYINDEX, class_fetches_ref);
lua_setmetatable(L, -2);
return 1;
}
/* This function is an LUA binding. It is called with each sample-fetch.
* It uses closure argument to store the associated sample-fetch. It
* returns only one argument or throws an error. An error is thrown
* only if an error is encountered during the argument parsing. If
* the "sample-fetch" function fails, nil is returned.
*/
__LJMP static int hlua_run_sample_fetch(lua_State *L)
{
struct hlua_smp *hsmp;
struct sample_fetch *f;
struct arg args[ARGM_NBARGS + 1] = {{0}};
int i;
struct sample smp;
/* Get closure arguments. */
f = lua_touserdata(L, lua_upvalueindex(1));
/* Get traditionnal arguments. */
hsmp = MAY_LJMP(hlua_checkfetches(L, 1));
/* Check execution authorization. */
if (f->use & SMP_USE_HTTP_ANY &&
!(hsmp->flags & HLUA_F_MAY_USE_HTTP)) {
lua_pushfstring(L, "the sample-fetch '%s' needs an HTTP parser which "
"is not available in Lua services", f->kw);
WILL_LJMP(lua_error(L));
}
/* Get extra arguments. */
for (i = 0; i < lua_gettop(L) - 1; i++) {
if (i >= ARGM_NBARGS)
break;
hlua_lua2arg(L, i + 2, &args[i]);
}
args[i].type = ARGT_STOP;
args[i].data.str.area = NULL;
/* Check arguments. */
MAY_LJMP(hlua_lua2arg_check(L, 2, args, f->arg_mask, hsmp->p));
/* Run the special args checker. */
if (f->val_args && !f->val_args(args, NULL)) {
lua_pushfstring(L, "error in arguments");
WILL_LJMP(lua_error(L));
}
/* Initialise the sample. */
memset(&smp, 0, sizeof(smp));
/* Run the sample fetch process. */
smp_set_owner(&smp, hsmp->p, hsmp->s->sess, hsmp->s, hsmp->dir & SMP_OPT_DIR);
if (!f->process(args, &smp, f->kw, f->private)) {
if (hsmp->flags & HLUA_F_AS_STRING)
lua_pushstring(L, "");
else
lua_pushnil(L);
return 1;
}
/* Convert the returned sample in lua value. */
if (hsmp->flags & HLUA_F_AS_STRING)
hlua_smp2lua_str(L, &smp);
else
hlua_smp2lua(L, &smp);
return 1;
}
/*
*
*
* Class Converters
*
*
*/
/* Returns a struct hlua_session if the stack entry "ud" is
* a class stream, otherwise it throws an error.
*/
__LJMP static struct hlua_smp *hlua_checkconverters(lua_State *L, int ud)
{
return MAY_LJMP(hlua_checkudata(L, ud, class_converters_ref));
}
/* This function creates and push in the stack a Converters object
* according with a current TXN.
*/
static int hlua_converters_new(lua_State *L, struct hlua_txn *txn, unsigned int flags)
{
struct hlua_smp *hsmp;
/* Check stack size. */
if (!lua_checkstack(L, 3))
return 0;
/* Create the object: obj[0] = userdata.
* Note that the base of the Converters object is the
* same than the TXN object.
*/
lua_newtable(L);
hsmp = lua_newuserdata(L, sizeof(*hsmp));
lua_rawseti(L, -2, 0);
hsmp->s = txn->s;
hsmp->p = txn->p;
hsmp->dir = txn->dir;
hsmp->flags = flags;
/* Pop a class stream metatable and affect it to the table. */
lua_rawgeti(L, LUA_REGISTRYINDEX, class_converters_ref);
lua_setmetatable(L, -2);
return 1;
}
/* This function is an LUA binding. It is called with each converter.
* It uses closure argument to store the associated converter. It
* returns only one argument or throws an error. An error is thrown
* only if an error is encountered during the argument parsing. If
* the converter function function fails, nil is returned.
*/
__LJMP static int hlua_run_sample_conv(lua_State *L)
{
struct hlua_smp *hsmp;
struct sample_conv *conv;
struct arg args[ARGM_NBARGS + 1] = {{0}};
int i;
struct sample smp;
/* Get closure arguments. */
conv = lua_touserdata(L, lua_upvalueindex(1));
/* Get traditionnal arguments. */
hsmp = MAY_LJMP(hlua_checkconverters(L, 1));
/* Get extra arguments. */
for (i = 0; i < lua_gettop(L) - 2; i++) {
if (i >= ARGM_NBARGS)
break;
hlua_lua2arg(L, i + 3, &args[i]);
}
args[i].type = ARGT_STOP;
args[i].data.str.area = NULL;
/* Check arguments. */
MAY_LJMP(hlua_lua2arg_check(L, 3, args, conv->arg_mask, hsmp->p));
/* Run the special args checker. */
if (conv->val_args && !conv->val_args(args, conv, "", 0, NULL)) {
hlua_pusherror(L, "error in arguments");
WILL_LJMP(lua_error(L));
}
/* Initialise the sample. */
if (!hlua_lua2smp(L, 2, &smp)) {
hlua_pusherror(L, "error in the input argument");
WILL_LJMP(lua_error(L));
}
smp_set_owner(&smp, hsmp->p, hsmp->s->sess, hsmp->s, hsmp->dir & SMP_OPT_DIR);
/* Apply expected cast. */
if (!sample_casts[smp.data.type][conv->in_type]) {
hlua_pusherror(L, "invalid input argument: cannot cast '%s' to '%s'",
smp_to_type[smp.data.type], smp_to_type[conv->in_type]);
WILL_LJMP(lua_error(L));
}
if (sample_casts[smp.data.type][conv->in_type] != c_none &&
!sample_casts[smp.data.type][conv->in_type](&smp)) {
hlua_pusherror(L, "error during the input argument casting");
WILL_LJMP(lua_error(L));
}
/* Run the sample conversion process. */
if (!conv->process(args, &smp, conv->private)) {
if (hsmp->flags & HLUA_F_AS_STRING)
lua_pushstring(L, "");
else
lua_pushnil(L);
return 1;
}
/* Convert the returned sample in lua value. */
if (hsmp->flags & HLUA_F_AS_STRING)
hlua_smp2lua_str(L, &smp);
else
hlua_smp2lua(L, &smp);
return 1;
}
/*
*
*
* Class AppletTCP
*
*
*/
/* Returns a struct hlua_txn if the stack entry "ud" is
* a class stream, otherwise it throws an error.
*/
__LJMP static struct hlua_appctx *hlua_checkapplet_tcp(lua_State *L, int ud)
{
return MAY_LJMP(hlua_checkudata(L, ud, class_applet_tcp_ref));
}
/* This function creates and push in the stack an Applet object
* according with a current TXN.
*/
static int hlua_applet_tcp_new(lua_State *L, struct appctx *ctx)
{
struct hlua_appctx *appctx;
struct stream_interface *si = ctx->owner;
struct stream *s = si_strm(si);
struct proxy *p = s->be;
/* Check stack size. */
if (!lua_checkstack(L, 3))
return 0;
/* Create the object: obj[0] = userdata.
* Note that the base of the Converters object is the
* same than the TXN object.
*/
lua_newtable(L);
appctx = lua_newuserdata(L, sizeof(*appctx));
lua_rawseti(L, -2, 0);
appctx->appctx = ctx;
appctx->htxn.s = s;
appctx->htxn.p = p;
/* Create the "f" field that contains a list of fetches. */
lua_pushstring(L, "f");
if (!hlua_fetches_new(L, &appctx->htxn, 0))
return 0;
lua_settable(L, -3);
/* Create the "sf" field that contains a list of stringsafe fetches. */
lua_pushstring(L, "sf");
if (!hlua_fetches_new(L, &appctx->htxn, HLUA_F_AS_STRING))
return 0;
lua_settable(L, -3);
/* Create the "c" field that contains a list of converters. */
lua_pushstring(L, "c");
if (!hlua_converters_new(L, &appctx->htxn, 0))
return 0;
lua_settable(L, -3);
/* Create the "sc" field that contains a list of stringsafe converters. */
lua_pushstring(L, "sc");
if (!hlua_converters_new(L, &appctx->htxn, HLUA_F_AS_STRING))
return 0;
lua_settable(L, -3);
/* Pop a class stream metatable and affect it to the table. */
lua_rawgeti(L, LUA_REGISTRYINDEX, class_applet_tcp_ref);
lua_setmetatable(L, -2);
return 1;
}
__LJMP static int hlua_applet_tcp_set_var(lua_State *L)
{
struct hlua_appctx *appctx;
struct stream *s;
const char *name;
size_t len;
struct sample smp;
MAY_LJMP(check_args(L, 3, "set_var"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
appctx = MAY_LJMP(hlua_checkapplet_tcp(L, 1));
name = MAY_LJMP(luaL_checklstring(L, 2, &len));
s = appctx->htxn.s;
/* Converts the third argument in a sample. */
hlua_lua2smp(L, 3, &smp);
/* Store the sample in a variable. */
smp_set_owner(&smp, s->be, s->sess, s, 0);
vars_set_by_name(name, len, &smp);
return 0;
}
__LJMP static int hlua_applet_tcp_unset_var(lua_State *L)
{
struct hlua_appctx *appctx;
struct stream *s;
const char *name;
size_t len;
struct sample smp;
MAY_LJMP(check_args(L, 2, "unset_var"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
appctx = MAY_LJMP(hlua_checkapplet_tcp(L, 1));
name = MAY_LJMP(luaL_checklstring(L, 2, &len));
s = appctx->htxn.s;
/* Unset the variable. */
smp_set_owner(&smp, s->be, s->sess, s, 0);
vars_unset_by_name(name, len, &smp);
return 0;
}
__LJMP static int hlua_applet_tcp_get_var(lua_State *L)
{
struct hlua_appctx *appctx;
struct stream *s;
const char *name;
size_t len;
struct sample smp;
MAY_LJMP(check_args(L, 2, "get_var"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
appctx = MAY_LJMP(hlua_checkapplet_tcp(L, 1));
name = MAY_LJMP(luaL_checklstring(L, 2, &len));
s = appctx->htxn.s;
smp_set_owner(&smp, s->be, s->sess, s, 0);
if (!vars_get_by_name(name, len, &smp)) {
lua_pushnil(L);
return 1;
}
return hlua_smp2lua(L, &smp);
}
__LJMP static int hlua_applet_tcp_set_priv(lua_State *L)
{
struct hlua_appctx *appctx = MAY_LJMP(hlua_checkapplet_tcp(L, 1));
struct stream *s = appctx->htxn.s;
struct hlua *hlua;
/* Note that this hlua struct is from the session and not from the applet. */
if (!s->hlua)
return 0;
hlua = s->hlua;
MAY_LJMP(check_args(L, 2, "set_priv"));
/* Remove previous value. */
luaL_unref(L, LUA_REGISTRYINDEX, hlua->Mref);
/* Get and store new value. */
lua_pushvalue(L, 2); /* Copy the element 2 at the top of the stack. */
hlua->Mref = luaL_ref(L, LUA_REGISTRYINDEX); /* pop the previously pushed value. */
return 0;
}
__LJMP static int hlua_applet_tcp_get_priv(lua_State *L)
{
struct hlua_appctx *appctx = MAY_LJMP(hlua_checkapplet_tcp(L, 1));
struct stream *s = appctx->htxn.s;
struct hlua *hlua;
/* Note that this hlua struct is from the session and not from the applet. */
if (!s->hlua) {
lua_pushnil(L);
return 1;
}
hlua = s->hlua;
/* Push configuration index in the stack. */
lua_rawgeti(L, LUA_REGISTRYINDEX, hlua->Mref);
return 1;
}
/* If expected data not yet available, it returns a yield. This function
* consumes the data in the buffer. It returns a string containing the
* data. This string can be empty.
*/
__LJMP static int hlua_applet_tcp_getline_yield(lua_State *L, int status, lua_KContext ctx)
{
struct hlua_appctx *appctx = MAY_LJMP(hlua_checkapplet_tcp(L, 1));
struct stream_interface *si = appctx->appctx->owner;
int ret;
const char *blk1;
size_t len1;
const char *blk2;
size_t len2;
/* Read the maximum amount of data avalaible. */
ret = co_getline_nc(si_oc(si), &blk1, &len1, &blk2, &len2);
/* Data not yet avalaible. return yield. */
if (ret == 0) {
si_applet_cant_get(si);
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_tcp_getline_yield, TICK_ETERNITY, 0));
}
/* End of data: commit the total strings and return. */
if (ret < 0) {
luaL_pushresult(&appctx->b);
return 1;
}
/* Ensure that the block 2 length is usable. */
if (ret == 1)
len2 = 0;
/* dont check the max length read and dont check. */
luaL_addlstring(&appctx->b, blk1, len1);
luaL_addlstring(&appctx->b, blk2, len2);
/* Consume input channel output buffer data. */
co_skip(si_oc(si), len1 + len2);
luaL_pushresult(&appctx->b);
return 1;
}
/* Check arguments for the fucntion "hlua_channel_get_yield". */
__LJMP static int hlua_applet_tcp_getline(lua_State *L)
{
struct hlua_appctx *appctx = MAY_LJMP(hlua_checkapplet_tcp(L, 1));
/* Initialise the string catenation. */
luaL_buffinit(L, &appctx->b);
return MAY_LJMP(hlua_applet_tcp_getline_yield(L, 0, 0));
}
/* If expected data not yet available, it returns a yield. This function
* consumes the data in the buffer. It returns a string containing the
* data. This string can be empty.
*/
__LJMP static int hlua_applet_tcp_recv_yield(lua_State *L, int status, lua_KContext ctx)
{
struct hlua_appctx *appctx = MAY_LJMP(hlua_checkapplet_tcp(L, 1));
struct stream_interface *si = appctx->appctx->owner;
size_t len = MAY_LJMP(luaL_checkinteger(L, 2));
int ret;
const char *blk1;
size_t len1;
const char *blk2;
size_t len2;
/* Read the maximum amount of data avalaible. */
ret = co_getblk_nc(si_oc(si), &blk1, &len1, &blk2, &len2);
/* Data not yet avalaible. return yield. */
if (ret == 0) {
si_applet_cant_get(si);
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_tcp_recv_yield, TICK_ETERNITY, 0));
}
/* End of data: commit the total strings and return. */
if (ret < 0) {
luaL_pushresult(&appctx->b);
return 1;
}
/* Ensure that the block 2 length is usable. */
if (ret == 1)
len2 = 0;
if (len == -1) {
/* If len == -1, catenate all the data avalaile and
* yield because we want to get all the data until
* the end of data stream.
*/
luaL_addlstring(&appctx->b, blk1, len1);
luaL_addlstring(&appctx->b, blk2, len2);
co_skip(si_oc(si), len1 + len2);
si_applet_cant_get(si);
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_tcp_recv_yield, TICK_ETERNITY, 0));
} else {
/* Copy the fisrt block caping to the length required. */
if (len1 > len)
len1 = len;
luaL_addlstring(&appctx->b, blk1, len1);
len -= len1;
/* Copy the second block. */
if (len2 > len)
len2 = len;
luaL_addlstring(&appctx->b, blk2, len2);
len -= len2;
/* Consume input channel output buffer data. */
co_skip(si_oc(si), len1 + len2);
/* If we are no other data avalaible, yield waiting for new data. */
if (len > 0) {
lua_pushinteger(L, len);
lua_replace(L, 2);
si_applet_cant_get(si);
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_tcp_recv_yield, TICK_ETERNITY, 0));
}
/* return the result. */
luaL_pushresult(&appctx->b);
return 1;
}
/* we never executes this */
hlua_pusherror(L, "Lua: internal error");
WILL_LJMP(lua_error(L));
return 0;
}
/* Check arguments for the fucntion "hlua_channel_get_yield". */
__LJMP static int hlua_applet_tcp_recv(lua_State *L)
{
struct hlua_appctx *appctx = MAY_LJMP(hlua_checkapplet_tcp(L, 1));
int len = -1;
if (lua_gettop(L) > 2)
WILL_LJMP(luaL_error(L, "The 'recv' function requires between 1 and 2 arguments."));
if (lua_gettop(L) >= 2) {
len = MAY_LJMP(luaL_checkinteger(L, 2));
lua_pop(L, 1);
}
/* Confirm or set the required length */
lua_pushinteger(L, len);
/* Initialise the string catenation. */
luaL_buffinit(L, &appctx->b);
return MAY_LJMP(hlua_applet_tcp_recv_yield(L, 0, 0));
}
/* Append data in the output side of the buffer. This data is immediatly
* sent. The fcuntion returns the ammount of data writed. If the buffer
* cannot contains the data, the function yield. The function returns -1
* if the channel is closed.
*/
__LJMP static int hlua_applet_tcp_send_yield(lua_State *L, int status, lua_KContext ctx)
{
size_t len;
struct hlua_appctx *appctx = MAY_LJMP(hlua_checkapplet_tcp(L, 1));
const char *str = MAY_LJMP(luaL_checklstring(L, 2, &len));
int l = MAY_LJMP(luaL_checkinteger(L, 3));
struct stream_interface *si = appctx->appctx->owner;
struct channel *chn = si_ic(si);
int max;
/* Get the max amount of data which can write as input in the channel. */
max = channel_recv_max(chn);
if (max > (len - l))
max = len - l;
/* Copy data. */
ci_putblk(chn, str + l, max);
/* update counters. */
l += max;
lua_pop(L, 1);
lua_pushinteger(L, l);
/* If some data is not send, declares the situation to the
* applet, and returns a yield.
*/
if (l < len) {
si_applet_cant_put(si);
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_tcp_send_yield, TICK_ETERNITY, 0));
}
return 1;
}
/* Just a wraper of "hlua_applet_tcp_send_yield". This wrapper permits
* yield the LUA process, and resume it without checking the
* input arguments.
*/
__LJMP static int hlua_applet_tcp_send(lua_State *L)
{
MAY_LJMP(check_args(L, 2, "send"));
lua_pushinteger(L, 0);
return MAY_LJMP(hlua_applet_tcp_send_yield(L, 0, 0));
}
/*
*
*
* Class AppletHTTP
*
*
*/
/* Returns a struct hlua_txn if the stack entry "ud" is
* a class stream, otherwise it throws an error.
*/
__LJMP static struct hlua_appctx *hlua_checkapplet_http(lua_State *L, int ud)
{
return MAY_LJMP(hlua_checkudata(L, ud, class_applet_http_ref));
}
/* This function creates and push in the stack an Applet object
* according with a current TXN.
*/
static int hlua_applet_http_new(lua_State *L, struct appctx *ctx)
{
struct hlua_appctx *appctx;
struct hlua_txn htxn;
struct stream_interface *si = ctx->owner;
struct stream *s = si_strm(si);
struct proxy *px = s->be;
struct http_txn *txn = s->txn;
const char *path;
const char *end;
const char *p;
/* Check stack size. */
if (!lua_checkstack(L, 3))
return 0;
/* Create the object: obj[0] = userdata.
* Note that the base of the Converters object is the
* same than the TXN object.
*/
lua_newtable(L);
appctx = lua_newuserdata(L, sizeof(*appctx));
lua_rawseti(L, -2, 0);
appctx->appctx = ctx;
appctx->appctx->ctx.hlua_apphttp.status = 200; /* Default status code returned. */
appctx->appctx->ctx.hlua_apphttp.reason = NULL; /* Use default reason based on status */
appctx->htxn.s = s;
appctx->htxn.p = px;
/* Create the "f" field that contains a list of fetches. */
lua_pushstring(L, "f");
if (!hlua_fetches_new(L, &appctx->htxn, 0))
return 0;
lua_settable(L, -3);
/* Create the "sf" field that contains a list of stringsafe fetches. */
lua_pushstring(L, "sf");
if (!hlua_fetches_new(L, &appctx->htxn, HLUA_F_AS_STRING))
return 0;
lua_settable(L, -3);
/* Create the "c" field that contains a list of converters. */
lua_pushstring(L, "c");
if (!hlua_converters_new(L, &appctx->htxn, 0))
return 0;
lua_settable(L, -3);
/* Create the "sc" field that contains a list of stringsafe converters. */
lua_pushstring(L, "sc");
if (!hlua_converters_new(L, &appctx->htxn, HLUA_F_AS_STRING))
return 0;
lua_settable(L, -3);
/* Stores the request method. */
lua_pushstring(L, "method");
lua_pushlstring(L, ci_head(txn->req.chn), txn->req.sl.rq.m_l);
lua_settable(L, -3);
/* Stores the http version. */
lua_pushstring(L, "version");
lua_pushlstring(L, ci_head(txn->req.chn) + txn->req.sl.rq.v, txn->req.sl.rq.v_l);
lua_settable(L, -3);
/* creates an array of headers. hlua_http_get_headers() crates and push
* the array on the top of the stack.
*/
lua_pushstring(L, "headers");
htxn.s = s;
htxn.p = px;
htxn.dir = SMP_OPT_DIR_REQ;
if (!hlua_http_get_headers(L, &htxn, &htxn.s->txn->req))
return 0;
lua_settable(L, -3);
/* Get path and qs */
path = http_txn_get_path(txn);
if (path) {
end = ci_head(txn->req.chn) + txn->req.sl.rq.u + txn->req.sl.rq.u_l;
p = path;
while (p < end && *p != '?')
p++;
/* Stores the request path. */
lua_pushstring(L, "path");
lua_pushlstring(L, path, p - path);
lua_settable(L, -3);
/* Stores the query string. */
lua_pushstring(L, "qs");
if (*p == '?')
p++;
lua_pushlstring(L, p, end - p);
lua_settable(L, -3);
}
/* Stores the request path. */
lua_pushstring(L, "length");
lua_pushinteger(L, txn->req.body_len);
lua_settable(L, -3);
/* Create an array of HTTP request headers. */
lua_pushstring(L, "headers");
MAY_LJMP(hlua_http_get_headers(L, &appctx->htxn, &appctx->htxn.s->txn->req));
lua_settable(L, -3);
/* Create an empty array of HTTP request headers. */
lua_pushstring(L, "response");
lua_newtable(L);
lua_settable(L, -3);
/* Pop a class stream metatable and affect it to the table. */
lua_rawgeti(L, LUA_REGISTRYINDEX, class_applet_http_ref);
lua_setmetatable(L, -2);
return 1;
}
__LJMP static int hlua_applet_http_set_var(lua_State *L)
{
struct hlua_appctx *appctx;
struct stream *s;
const char *name;
size_t len;
struct sample smp;
MAY_LJMP(check_args(L, 3, "set_var"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
appctx = MAY_LJMP(hlua_checkapplet_http(L, 1));
name = MAY_LJMP(luaL_checklstring(L, 2, &len));
s = appctx->htxn.s;
/* Converts the third argument in a sample. */
hlua_lua2smp(L, 3, &smp);
/* Store the sample in a variable. */
smp_set_owner(&smp, s->be, s->sess, s, 0);
vars_set_by_name(name, len, &smp);
return 0;
}
__LJMP static int hlua_applet_http_unset_var(lua_State *L)
{
struct hlua_appctx *appctx;
struct stream *s;
const char *name;
size_t len;
struct sample smp;
MAY_LJMP(check_args(L, 2, "unset_var"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
appctx = MAY_LJMP(hlua_checkapplet_http(L, 1));
name = MAY_LJMP(luaL_checklstring(L, 2, &len));
s = appctx->htxn.s;
/* Unset the variable. */
smp_set_owner(&smp, s->be, s->sess, s, 0);
vars_unset_by_name(name, len, &smp);
return 0;
}
__LJMP static int hlua_applet_http_get_var(lua_State *L)
{
struct hlua_appctx *appctx;
struct stream *s;
const char *name;
size_t len;
struct sample smp;
MAY_LJMP(check_args(L, 2, "get_var"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
appctx = MAY_LJMP(hlua_checkapplet_http(L, 1));
name = MAY_LJMP(luaL_checklstring(L, 2, &len));
s = appctx->htxn.s;
smp_set_owner(&smp, s->be, s->sess, s, 0);
if (!vars_get_by_name(name, len, &smp)) {
lua_pushnil(L);
return 1;
}
return hlua_smp2lua(L, &smp);
}
__LJMP static int hlua_applet_http_set_priv(lua_State *L)
{
struct hlua_appctx *appctx = MAY_LJMP(hlua_checkapplet_http(L, 1));
struct stream *s = appctx->htxn.s;
struct hlua *hlua;
/* Note that this hlua struct is from the session and not from the applet. */
if (!s->hlua)
return 0;
hlua = s->hlua;
MAY_LJMP(check_args(L, 2, "set_priv"));
/* Remove previous value. */
luaL_unref(L, LUA_REGISTRYINDEX, hlua->Mref);
/* Get and store new value. */
lua_pushvalue(L, 2); /* Copy the element 2 at the top of the stack. */
hlua->Mref = luaL_ref(L, LUA_REGISTRYINDEX); /* pop the previously pushed value. */
return 0;
}
__LJMP static int hlua_applet_http_get_priv(lua_State *L)
{
struct hlua_appctx *appctx = MAY_LJMP(hlua_checkapplet_http(L, 1));
struct stream *s = appctx->htxn.s;
struct hlua *hlua;
/* Note that this hlua struct is from the session and not from the applet. */
if (!s->hlua) {
lua_pushnil(L);
return 1;
}
hlua = s->hlua;
/* Push configuration index in the stack. */
lua_rawgeti(L, LUA_REGISTRYINDEX, hlua->Mref);
return 1;
}
/* If expected data not yet available, it returns a yield. This function
* consumes the data in the buffer. It returns a string containing the
* data. This string can be empty.
*/
__LJMP static int hlua_applet_http_getline_yield(lua_State *L, int status, lua_KContext ctx)
{
struct hlua_appctx *appctx = MAY_LJMP(hlua_checkapplet_http(L, 1));
struct stream_interface *si = appctx->appctx->owner;
struct channel *chn = si_ic(si);
int ret;
const char *blk1;
size_t len1;
const char *blk2;
size_t len2;
/* Maybe we cant send a 100-continue ? */
if (appctx->appctx->ctx.hlua_apphttp.flags & APPLET_100C) {
ret = ci_putblk(chn, HTTP_100.ptr, HTTP_100.len);
/* if ret == -2 or -3 the channel closed or the message si too
* big for the buffers. We cant send anything. So, we ignoring
* the error, considers that the 100-continue is sent, and try
* to receive.
* If ret is -1, we dont have room in the buffer, so we yield.
*/
if (ret == -1) {
si_applet_cant_put(si);
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_http_getline_yield, TICK_ETERNITY, 0));
}
appctx->appctx->ctx.hlua_apphttp.flags &= ~APPLET_100C;
}
/* Check for the end of the data. */
if (appctx->appctx->ctx.hlua_apphttp.left_bytes <= 0) {
luaL_pushresult(&appctx->b);
return 1;
}
/* Read the maximum amount of data avalaible. */
ret = co_getline_nc(si_oc(si), &blk1, &len1, &blk2, &len2);
/* Data not yet avalaible. return yield. */
if (ret == 0) {
si_applet_cant_get(si);
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_http_getline_yield, TICK_ETERNITY, 0));
}
/* End of data: commit the total strings and return. */
if (ret < 0) {
luaL_pushresult(&appctx->b);
return 1;
}
/* Ensure that the block 2 length is usable. */
if (ret == 1)
len2 = 0;
/* Copy the fisrt block caping to the length required. */
if (len1 > appctx->appctx->ctx.hlua_apphttp.left_bytes)
len1 = appctx->appctx->ctx.hlua_apphttp.left_bytes;
luaL_addlstring(&appctx->b, blk1, len1);
appctx->appctx->ctx.hlua_apphttp.left_bytes -= len1;
/* Copy the second block. */
if (len2 > appctx->appctx->ctx.hlua_apphttp.left_bytes)
len2 = appctx->appctx->ctx.hlua_apphttp.left_bytes;
luaL_addlstring(&appctx->b, blk2, len2);
appctx->appctx->ctx.hlua_apphttp.left_bytes -= len2;
/* Consume input channel output buffer data. */
co_skip(si_oc(si), len1 + len2);
luaL_pushresult(&appctx->b);
return 1;
}
/* Check arguments for the fucntion "hlua_channel_get_yield". */
__LJMP static int hlua_applet_http_getline(lua_State *L)
{
struct hlua_appctx *appctx = MAY_LJMP(hlua_checkapplet_http(L, 1));
/* Initialise the string catenation. */
luaL_buffinit(L, &appctx->b);
return MAY_LJMP(hlua_applet_http_getline_yield(L, 0, 0));
}
/* If expected data not yet available, it returns a yield. This function
* consumes the data in the buffer. It returns a string containing the
* data. This string can be empty.
*/
__LJMP static int hlua_applet_http_recv_yield(lua_State *L, int status, lua_KContext ctx)
{
struct hlua_appctx *appctx = MAY_LJMP(hlua_checkapplet_http(L, 1));
struct stream_interface *si = appctx->appctx->owner;
int len = MAY_LJMP(luaL_checkinteger(L, 2));
struct channel *chn = si_ic(si);
int ret;
const char *blk1;
size_t len1;
const char *blk2;
size_t len2;
/* Maybe we cant send a 100-continue ? */
if (appctx->appctx->ctx.hlua_apphttp.flags & APPLET_100C) {
ret = ci_putblk(chn, HTTP_100.ptr, HTTP_100.len);
/* if ret == -2 or -3 the channel closed or the message si too
* big for the buffers. We cant send anything. So, we ignoring
* the error, considers that the 100-continue is sent, and try
* to receive.
* If ret is -1, we dont have room in the buffer, so we yield.
*/
if (ret == -1) {
si_applet_cant_put(si);
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_http_recv_yield, TICK_ETERNITY, 0));
}
appctx->appctx->ctx.hlua_apphttp.flags &= ~APPLET_100C;
}
/* Read the maximum amount of data avalaible. */
ret = co_getblk_nc(si_oc(si), &blk1, &len1, &blk2, &len2);
/* Data not yet avalaible. return yield. */
if (ret == 0) {
si_applet_cant_get(si);
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_http_recv_yield, TICK_ETERNITY, 0));
}
/* End of data: commit the total strings and return. */
if (ret < 0) {
luaL_pushresult(&appctx->b);
return 1;
}
/* Ensure that the block 2 length is usable. */
if (ret == 1)
len2 = 0;
/* Copy the fisrt block caping to the length required. */
if (len1 > len)
len1 = len;
luaL_addlstring(&appctx->b, blk1, len1);
len -= len1;
/* Copy the second block. */
if (len2 > len)
len2 = len;
luaL_addlstring(&appctx->b, blk2, len2);
len -= len2;
/* Consume input channel output buffer data. */
co_skip(si_oc(si), len1 + len2);
if (appctx->appctx->ctx.hlua_apphttp.left_bytes != -1)
appctx->appctx->ctx.hlua_apphttp.left_bytes -= len;
/* If we are no other data avalaible, yield waiting for new data. */
if (len > 0) {
lua_pushinteger(L, len);
lua_replace(L, 2);
si_applet_cant_get(si);
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_http_recv_yield, TICK_ETERNITY, 0));
}
/* return the result. */
luaL_pushresult(&appctx->b);
return 1;
}
/* Check arguments for the fucntion "hlua_channel_get_yield". */
__LJMP static int hlua_applet_http_recv(lua_State *L)
{
struct hlua_appctx *appctx = MAY_LJMP(hlua_checkapplet_http(L, 1));
int len = -1;
/* Check arguments. */
if (lua_gettop(L) > 2)
WILL_LJMP(luaL_error(L, "The 'recv' function requires between 1 and 2 arguments."));
if (lua_gettop(L) >= 2) {
len = MAY_LJMP(luaL_checkinteger(L, 2));
lua_pop(L, 1);
}
/* Check the required length */
if (len == -1 || len > appctx->appctx->ctx.hlua_apphttp.left_bytes)
len = appctx->appctx->ctx.hlua_apphttp.left_bytes;
lua_pushinteger(L, len);
/* Initialise the string catenation. */
luaL_buffinit(L, &appctx->b);
return MAY_LJMP(hlua_applet_http_recv_yield(L, 0, 0));
}
/* Append data in the output side of the buffer. This data is immediatly
* sent. The fcuntion returns the ammount of data writed. If the buffer
* cannot contains the data, the function yield. The function returns -1
* if the channel is closed.
*/
__LJMP static int hlua_applet_http_send_yield(lua_State *L, int status, lua_KContext ctx)
{
size_t len;
struct hlua_appctx *appctx = MAY_LJMP(hlua_checkapplet_http(L, 1));
const char *str = MAY_LJMP(luaL_checklstring(L, 2, &len));
int l = MAY_LJMP(luaL_checkinteger(L, 3));
struct stream_interface *si = appctx->appctx->owner;
struct channel *chn = si_ic(si);
int max;
/* Get the max amount of data which can write as input in the channel. */
max = channel_recv_max(chn);
if (max > (len - l))
max = len - l;
/* Copy data. */
ci_putblk(chn, str + l, max);
/* update counters. */
l += max;
lua_pop(L, 1);
lua_pushinteger(L, l);
/* If some data is not send, declares the situation to the
* applet, and returns a yield.
*/
if (l < len) {
si_applet_cant_put(si);
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_http_send_yield, TICK_ETERNITY, 0));
}
return 1;
}
/* Just a wraper of "hlua_applet_send_yield". This wrapper permits
* yield the LUA process, and resume it without checking the
* input arguments.
*/
__LJMP static int hlua_applet_http_send(lua_State *L)
{
struct hlua_appctx *appctx = MAY_LJMP(hlua_checkapplet_http(L, 1));
size_t len;
char hex[10];
MAY_LJMP(luaL_checklstring(L, 2, &len));
/* If transfer encoding chunked is selected, we surround the data
* by chunk data.
*/
if (appctx->appctx->ctx.hlua_apphttp.flags & APPLET_CHUNKED) {
snprintf(hex, 9, "%x", (unsigned int)len);
lua_pushfstring(L, "%s\r\n", hex);
lua_insert(L, 2); /* swap the last 2 entries. */
lua_pushstring(L, "\r\n");
lua_concat(L, 3);
}
/* This interger is used for followinf the amount of data sent. */
lua_pushinteger(L, 0);
/* We want to send some data. Headers must be sent. */
if (!(appctx->appctx->ctx.hlua_apphttp.flags & APPLET_HDR_SENT)) {
hlua_pusherror(L, "Lua: 'send' you must call start_response() before sending data.");
WILL_LJMP(lua_error(L));
}
return MAY_LJMP(hlua_applet_http_send_yield(L, 0, 0));
}
__LJMP static int hlua_applet_http_addheader(lua_State *L)
{
const char *name;
int ret;
MAY_LJMP(hlua_checkapplet_http(L, 1));
name = MAY_LJMP(luaL_checkstring(L, 2));
MAY_LJMP(luaL_checkstring(L, 3));
/* Push in the stack the "response" entry. */
ret = lua_getfield(L, 1, "response");
if (ret != LUA_TTABLE) {
hlua_pusherror(L, "Lua: 'add_header' internal error: AppletHTTP['response'] "
"is expected as an array. %s found", lua_typename(L, ret));
WILL_LJMP(lua_error(L));
}
/* check if the header is already registered if it is not
* the case, register it.
*/
ret = lua_getfield(L, -1, name);
if (ret == LUA_TNIL) {
/* Entry not found. */
lua_pop(L, 1); /* remove the nil. The "response" table is the top of the stack. */
/* Insert the new header name in the array in the top of the stack.
* It left the new array in the top of the stack.
*/
lua_newtable(L);
lua_pushvalue(L, 2);
lua_pushvalue(L, -2);
lua_settable(L, -4);
} else if (ret != LUA_TTABLE) {
/* corruption error. */
hlua_pusherror(L, "Lua: 'add_header' internal error: AppletHTTP['response']['%s'] "
"is expected as an array. %s found", name, lua_typename(L, ret));
WILL_LJMP(lua_error(L));
}
/* Now the top od thestack is an array of values. We push
* the header value as new entry.
*/
lua_pushvalue(L, 3);
ret = lua_rawlen(L, -2);
lua_rawseti(L, -2, ret + 1);
lua_pushboolean(L, 1);
return 1;
}
__LJMP static int hlua_applet_http_status(lua_State *L)
{
struct hlua_appctx *appctx = MAY_LJMP(hlua_checkapplet_http(L, 1));
int status = MAY_LJMP(luaL_checkinteger(L, 2));
const char *reason = MAY_LJMP(luaL_optlstring(L, 3, NULL, NULL));
if (status < 100 || status > 599) {
lua_pushboolean(L, 0);
return 1;
}
appctx->appctx->ctx.hlua_apphttp.status = status;
appctx->appctx->ctx.hlua_apphttp.reason = reason;
lua_pushboolean(L, 1);
return 1;
}
/* We will build the status line and the headers of the HTTP response.
* We will try send at once if its not possible, we give back the hand
* waiting for more room.
*/
__LJMP static int hlua_applet_http_start_response_yield(lua_State *L, int status, lua_KContext ctx)
{
struct hlua_appctx *appctx = MAY_LJMP(hlua_checkapplet_http(L, 1));
struct stream_interface *si = appctx->appctx->owner;
struct channel *chn = si_ic(si);
int ret;
size_t len;
const char *msg;
/* Get the message as the first argument on the stack. */
msg = MAY_LJMP(luaL_checklstring(L, 2, &len));
/* Send the message at once. */
ret = ci_putblk(chn, msg, len);
/* if ret == -2 or -3 the channel closed or the message si too
* big for the buffers.
*/
if (ret == -2 || ret == -3) {
hlua_pusherror(L, "Lua: 'start_response': response header block too big");
WILL_LJMP(lua_error(L));
}
/* If ret is -1, we dont have room in the buffer, so we yield. */
if (ret == -1) {
si_applet_cant_put(si);
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_applet_http_start_response_yield, TICK_ETERNITY, 0));
}
/* Headers sent, set the flag. */
appctx->appctx->ctx.hlua_apphttp.flags |= APPLET_HDR_SENT;
return 0;
}
__LJMP static int hlua_applet_http_start_response(lua_State *L)
{
struct buffer *tmp = get_trash_chunk();
struct hlua_appctx *appctx = MAY_LJMP(hlua_checkapplet_http(L, 1));
const char *name;
size_t name_len;
const char *value;
size_t value_len;
int id;
long long hdr_contentlength = -1;
int hdr_chunked = 0;
const char *reason = appctx->appctx->ctx.hlua_apphttp.reason;
if (reason == NULL)
reason = http_get_reason(appctx->appctx->ctx.hlua_apphttp.status);
/* Use the same http version than the request. */
chunk_appendf(tmp, "HTTP/1.%c %d %s\r\n",
appctx->appctx->ctx.hlua_apphttp.flags & APPLET_HTTP11 ? '1' : '0',
appctx->appctx->ctx.hlua_apphttp.status,
reason);
/* Get the array associated to the field "response" in the object AppletHTTP. */
lua_pushvalue(L, 0);
if (lua_getfield(L, 1, "response") != LUA_TTABLE) {
hlua_pusherror(L, "Lua applet http '%s': AppletHTTP['response'] missing.\n",
appctx->appctx->rule->arg.hlua_rule->fcn.name);
WILL_LJMP(lua_error(L));
}
/* Browse the list of headers. */
lua_pushnil(L);
while(lua_next(L, -2) != 0) {
/* We expect a string as -2. */
if (lua_type(L, -2) != LUA_TSTRING) {
hlua_pusherror(L, "Lua applet http '%s': AppletHTTP['response'][] element must be a string. got %s.\n",
appctx->appctx->rule->arg.hlua_rule->fcn.name,
lua_typename(L, lua_type(L, -2)));
WILL_LJMP(lua_error(L));
}
name = lua_tolstring(L, -2, &name_len);
/* We expect an array as -1. */
if (lua_type(L, -1) != LUA_TTABLE) {
hlua_pusherror(L, "Lua applet http '%s': AppletHTTP['response']['%s'] element must be an table. got %s.\n",
appctx->appctx->rule->arg.hlua_rule->fcn.name,
name,
lua_typename(L, lua_type(L, -1)));
WILL_LJMP(lua_error(L));
}
/* Browse the table who is on the top of the stack. */
lua_pushnil(L);
while(lua_next(L, -2) != 0) {
/* We expect a number as -2. */
if (lua_type(L, -2) != LUA_TNUMBER) {
hlua_pusherror(L, "Lua applet http '%s': AppletHTTP['response']['%s'][] element must be a number. got %s.\n",
appctx->appctx->rule->arg.hlua_rule->fcn.name,
name,
lua_typename(L, lua_type(L, -2)));
WILL_LJMP(lua_error(L));
}
id = lua_tointeger(L, -2);
/* We expect a string as -2. */
if (lua_type(L, -1) != LUA_TSTRING) {
hlua_pusherror(L, "Lua applet http '%s': AppletHTTP['response']['%s'][%d] element must be a string. got %s.\n",
appctx->appctx->rule->arg.hlua_rule->fcn.name,
name, id,
lua_typename(L, lua_type(L, -1)));
WILL_LJMP(lua_error(L));
}
value = lua_tolstring(L, -1, &value_len);
/* Catenate a new header. */
if (tmp->data + name_len + 2 + value_len + 2 < tmp->size) {
memcpy(tmp->area + tmp->data, name, name_len);
tmp->data += name_len;
tmp->area[tmp->data++] = ':';
tmp->area[tmp->data++] = ' ';
memcpy(tmp->area + tmp->data, value,
value_len);
tmp->data += value_len;
tmp->area[tmp->data++] = '\r';
tmp->area[tmp->data++] = '\n';
}
/* Protocol checks. */
/* Copy the header content length. The length conversion
* is done without control. If it contains a bad value,
* the content-length remains negative so that we can
* switch to either chunked encoding or close.
*/
if (name_len == 14 && strcasecmp("content-length", name) == 0)
strl2llrc(value, strlen(value), &hdr_contentlength);
/* Check if the client annouces a transfer-encoding chunked it self. */
if (name_len == 17 && value_len == 7 &&
strcasecmp("transfer-encoding", name) == 0 &&
strcasecmp("chunked", value) == 0)
hdr_chunked = 1;
/* Remove the array from the stack, and get next element with a remaining string. */
lua_pop(L, 1);
}
/* Remove the array from the stack, and get next element with a remaining string. */
lua_pop(L, 1);
}
/* If we dont have a content-length set, and the HTTP version is 1.1
* and the status code implies the presence of a message body, we must
* announce a transfer encoding chunked. This is required by haproxy
* for the keepalive compliance. If the applet annouces a transfer-encoding
* chunked itslef, don't do anything.
*/
if (hdr_contentlength < 0 && hdr_chunked == 0 &&
(appctx->appctx->ctx.hlua_apphttp.flags & APPLET_HTTP11) &&
appctx->appctx->ctx.hlua_apphttp.status >= 200 &&
appctx->appctx->ctx.hlua_apphttp.status != 204 &&
appctx->appctx->ctx.hlua_apphttp.status != 304) {
chunk_appendf(tmp, "Transfer-encoding: chunked\r\n");
appctx->appctx->ctx.hlua_apphttp.flags |= APPLET_CHUNKED;
}
/* Finalize headers. */
chunk_appendf(tmp, "\r\n");
/* Remove the last entry and the array of headers */
lua_pop(L, 2);
/* Push the headers block. */
lua_pushlstring(L, tmp->area, tmp->data);
return MAY_LJMP(hlua_applet_http_start_response_yield(L, 0, 0));
}
/*
*
*
* Class HTTP
*
*
*/
/* Returns a struct hlua_txn if the stack entry "ud" is
* a class stream, otherwise it throws an error.
*/
__LJMP static struct hlua_txn *hlua_checkhttp(lua_State *L, int ud)
{
return MAY_LJMP(hlua_checkudata(L, ud, class_http_ref));
}
/* This function creates and push in the stack a HTTP object
* according with a current TXN.
*/
static int hlua_http_new(lua_State *L, struct hlua_txn *txn)
{
struct hlua_txn *htxn;
/* Check stack size. */
if (!lua_checkstack(L, 3))
return 0;
/* Create the object: obj[0] = userdata.
* Note that the base of the Converters object is the
* same than the TXN object.
*/
lua_newtable(L);
htxn = lua_newuserdata(L, sizeof(*htxn));
lua_rawseti(L, -2, 0);
htxn->s = txn->s;
htxn->p = txn->p;
/* Pop a class stream metatable and affect it to the table. */
lua_rawgeti(L, LUA_REGISTRYINDEX, class_http_ref);
lua_setmetatable(L, -2);
return 1;
}
/* This function creates ans returns an array of HTTP headers.
* This function does not fails. It is used as wrapper with the
* 2 following functions.
*/
__LJMP static int hlua_http_get_headers(lua_State *L, struct hlua_txn *htxn, struct http_msg *msg)
{
const char *cur_ptr, *cur_next, *p;
int old_idx, cur_idx;
struct hdr_idx_elem *cur_hdr;
const char *hn, *hv;
int hnl, hvl;
int type;
const char *in;
char *out;
int len;
/* Create the table. */
lua_newtable(L);
if (!htxn->s->txn)
return 1;
/* Check if a valid response is parsed */
if (unlikely(msg->msg_state < HTTP_MSG_BODY))
return 1;
/* Build array of headers. */
old_idx = 0;
cur_next = ci_head(msg->chn) + hdr_idx_first_pos(&htxn->s->txn->hdr_idx);
while (1) {
cur_idx = htxn->s->txn->hdr_idx.v[old_idx].next;
if (!cur_idx)
break;
old_idx = cur_idx;
cur_hdr = &htxn->s->txn->hdr_idx.v[cur_idx];
cur_ptr = cur_next;
cur_next = cur_ptr + cur_hdr->len + cur_hdr->cr + 1;
/* Now we have one full header at cur_ptr of len cur_hdr->len,
* and the next header starts at cur_next. We'll check
* this header in the list as well as against the default
* rule.
*/
/* look for ': *'. */
hn = cur_ptr;
for (p = cur_ptr; p < cur_ptr + cur_hdr->len && *p != ':'; p++);
if (p >= cur_ptr+cur_hdr->len)
continue;
hnl = p - hn;
p++;
while (p < cur_ptr+cur_hdr->len && ( *p == ' ' || *p == '\t' ))
p++;
if (p >= cur_ptr+cur_hdr->len)
continue;
hv = p;
hvl = cur_ptr+cur_hdr->len-p;
/* Lowercase the key. Don't check the size of trash, it have
* the size of one buffer and the input data contains in one
* buffer.
*/
out = trash.area;
for (in=hn; in<hn+hnl; in++, out++)
*out = tolower(*in);
*out = '\0';
/* Check for existing entry:
* assume that the table is on the top of the stack, and
* push the key in the stack, the function lua_gettable()
* perform the lookup.
*/
lua_pushlstring(L, trash.area, hnl);
lua_gettable(L, -2);
type = lua_type(L, -1);
switch (type) {
case LUA_TNIL:
/* Table not found, create it. */
lua_pop(L, 1); /* remove the nil value. */
lua_pushlstring(L, trash.area, hnl); /* push the header name as key. */
lua_newtable(L); /* create and push empty table. */
lua_pushlstring(L, hv, hvl); /* push header value. */
lua_rawseti(L, -2, 0); /* index header value (pop it). */
lua_rawset(L, -3); /* index new table with header name (pop the values). */
break;
case LUA_TTABLE:
/* Entry found: push the value in the table. */
len = lua_rawlen(L, -1);
lua_pushlstring(L, hv, hvl); /* push header value. */
lua_rawseti(L, -2, len+1); /* index header value (pop it). */
lua_pop(L, 1); /* remove the table (it is stored in the main table). */
break;
default:
/* Other cases are errors. */
hlua_pusherror(L, "internal error during the parsing of headers.");
WILL_LJMP(lua_error(L));
}
}
return 1;
}
__LJMP static int hlua_http_req_get_headers(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 1, "req_get_headers"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
return hlua_http_get_headers(L, htxn, &htxn->s->txn->req);
}
__LJMP static int hlua_http_res_get_headers(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 1, "res_get_headers"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
return hlua_http_get_headers(L, htxn, &htxn->s->txn->rsp);
}
/* This function replace full header, or just a value in
* the request or in the response. It is a wrapper fir the
* 4 following functions.
*/
__LJMP static inline int hlua_http_rep_hdr(lua_State *L, struct hlua_txn *htxn,
struct http_msg *msg, int action)
{
size_t name_len;
const char *name = MAY_LJMP(luaL_checklstring(L, 2, &name_len));
const char *reg = MAY_LJMP(luaL_checkstring(L, 3));
const char *value = MAY_LJMP(luaL_checkstring(L, 4));
struct my_regex re;
/* Check if a valid response is parsed */
if (unlikely(msg->msg_state < HTTP_MSG_BODY))
return 0;
if (!regex_comp(reg, &re, 1, 1, NULL))
WILL_LJMP(luaL_argerror(L, 3, "invalid regex"));
http_transform_header_str(htxn->s, msg, name, name_len, value, &re, action);
regex_free(&re);
return 0;
}
__LJMP static int hlua_http_req_rep_hdr(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 4, "req_rep_hdr"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
return MAY_LJMP(hlua_http_rep_hdr(L, htxn, &htxn->s->txn->req, ACT_HTTP_REPLACE_HDR));
}
__LJMP static int hlua_http_res_rep_hdr(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 4, "res_rep_hdr"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
return MAY_LJMP(hlua_http_rep_hdr(L, htxn, &htxn->s->txn->rsp, ACT_HTTP_REPLACE_HDR));
}
__LJMP static int hlua_http_req_rep_val(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 4, "req_rep_hdr"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
return MAY_LJMP(hlua_http_rep_hdr(L, htxn, &htxn->s->txn->req, ACT_HTTP_REPLACE_VAL));
}
__LJMP static int hlua_http_res_rep_val(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 4, "res_rep_val"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
return MAY_LJMP(hlua_http_rep_hdr(L, htxn, &htxn->s->txn->rsp, ACT_HTTP_REPLACE_VAL));
}
/* This function deletes all the occurences of an header.
* It is a wrapper for the 2 following functions.
*/
__LJMP static inline int hlua_http_del_hdr(lua_State *L, struct hlua_txn *htxn, struct http_msg *msg)
{
size_t len;
const char *name = MAY_LJMP(luaL_checklstring(L, 2, &len));
struct hdr_ctx ctx;
struct http_txn *txn = htxn->s->txn;
/* Check if a valid response is parsed */
if (unlikely(msg->msg_state < HTTP_MSG_BODY))
return 0;
ctx.idx = 0;
while (http_find_header2(name, len, ci_head(msg->chn), &txn->hdr_idx, &ctx))
http_remove_header2(msg, &txn->hdr_idx, &ctx);
return 0;
}
__LJMP static int hlua_http_req_del_hdr(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 2, "req_del_hdr"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
return hlua_http_del_hdr(L, htxn, &htxn->s->txn->req);
}
__LJMP static int hlua_http_res_del_hdr(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 2, "req_del_hdr"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
return hlua_http_del_hdr(L, htxn, &htxn->s->txn->rsp);
}
/* This function adds an header. It is a wrapper used by
* the 2 following functions.
*/
__LJMP static inline int hlua_http_add_hdr(lua_State *L, struct hlua_txn *htxn, struct http_msg *msg)
{
size_t name_len;
const char *name = MAY_LJMP(luaL_checklstring(L, 2, &name_len));
size_t value_len;
const char *value = MAY_LJMP(luaL_checklstring(L, 3, &value_len));
char *p;
/* Check if a valid message is parsed */
if (unlikely(msg->msg_state < HTTP_MSG_BODY))
return 0;
/* Check length. */
trash.data = value_len + name_len + 2;
if (trash.data > trash.size)
return 0;
/* Creates the header string. */
p = trash.area;
memcpy(p, name, name_len);
p += name_len;
*p = ':';
p++;
*p = ' ';
p++;
memcpy(p, value, value_len);
lua_pushboolean(L, http_header_add_tail2(msg, &htxn->s->txn->hdr_idx,
trash.area, trash.data) != 0);
return 0;
}
__LJMP static int hlua_http_req_add_hdr(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 3, "req_add_hdr"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
return hlua_http_add_hdr(L, htxn, &htxn->s->txn->req);
}
__LJMP static int hlua_http_res_add_hdr(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 3, "res_add_hdr"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
return hlua_http_add_hdr(L, htxn, &htxn->s->txn->rsp);
}
static int hlua_http_req_set_hdr(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 3, "req_set_hdr"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
hlua_http_del_hdr(L, htxn, &htxn->s->txn->req);
return hlua_http_add_hdr(L, htxn, &htxn->s->txn->req);
}
static int hlua_http_res_set_hdr(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 3, "res_set_hdr"));
htxn = MAY_LJMP(hlua_checkhttp(L, 1));
hlua_http_del_hdr(L, htxn, &htxn->s->txn->rsp);
return hlua_http_add_hdr(L, htxn, &htxn->s->txn->rsp);
}
/* This function set the method. */
static int hlua_http_req_set_meth(lua_State *L)
{
struct hlua_txn *htxn = MAY_LJMP(hlua_checkhttp(L, 1));
size_t name_len;
const char *name = MAY_LJMP(luaL_checklstring(L, 2, &name_len));
/* Check if a valid request is parsed */
if (unlikely(htxn->s->txn->req.msg_state < HTTP_MSG_BODY)) {
lua_pushboolean(L, 0);
return 1;
}
lua_pushboolean(L, http_replace_req_line(0, name, name_len, htxn->p, htxn->s) != -1);
return 1;
}
/* This function set the method. */
static int hlua_http_req_set_path(lua_State *L)
{
struct hlua_txn *htxn = MAY_LJMP(hlua_checkhttp(L, 1));
size_t name_len;
const char *name = MAY_LJMP(luaL_checklstring(L, 2, &name_len));
/* Check if a valid request is parsed */
if (unlikely(htxn->s->txn->req.msg_state < HTTP_MSG_BODY)) {
lua_pushboolean(L, 0);
return 1;
}
lua_pushboolean(L, http_replace_req_line(1, name, name_len, htxn->p, htxn->s) != -1);
return 1;
}
/* This function set the query-string. */
static int hlua_http_req_set_query(lua_State *L)
{
struct hlua_txn *htxn = MAY_LJMP(hlua_checkhttp(L, 1));
size_t name_len;
const char *name = MAY_LJMP(luaL_checklstring(L, 2, &name_len));
/* Check if a valid request is parsed */
if (unlikely(htxn->s->txn->req.msg_state < HTTP_MSG_BODY)) {
lua_pushboolean(L, 0);
return 1;
}
/* Check length. */
if (name_len > trash.size - 1) {
lua_pushboolean(L, 0);
return 1;
}
/* Add the mark question as prefix. */
chunk_reset(&trash);
trash.area[trash.data++] = '?';
memcpy(trash.area + trash.data, name, name_len);
trash.data += name_len;
lua_pushboolean(L,
http_replace_req_line(2, trash.area, trash.data, htxn->p, htxn->s) != -1);
return 1;
}
/* This function set the uri. */
static int hlua_http_req_set_uri(lua_State *L)
{
struct hlua_txn *htxn = MAY_LJMP(hlua_checkhttp(L, 1));
size_t name_len;
const char *name = MAY_LJMP(luaL_checklstring(L, 2, &name_len));
/* Check if a valid request is parsed */
if (unlikely(htxn->s->txn->req.msg_state < HTTP_MSG_BODY)) {
lua_pushboolean(L, 0);
return 1;
}
lua_pushboolean(L, http_replace_req_line(3, name, name_len, htxn->p, htxn->s) != -1);
return 1;
}
/* This function set the response code & optionally reason. */
static int hlua_http_res_set_status(lua_State *L)
{
struct hlua_txn *htxn = MAY_LJMP(hlua_checkhttp(L, 1));
unsigned int code = MAY_LJMP(luaL_checkinteger(L, 2));
const char *reason = MAY_LJMP(luaL_optlstring(L, 3, NULL, NULL));
/* Check if a valid response is parsed */
if (unlikely(htxn->s->txn->rsp.msg_state < HTTP_MSG_BODY))
return 0;
http_set_status(code, reason, htxn->s);
return 0;
}
/*
*
*
* Class TXN
*
*
*/
/* Returns a struct hlua_session if the stack entry "ud" is
* a class stream, otherwise it throws an error.
*/
__LJMP static struct hlua_txn *hlua_checktxn(lua_State *L, int ud)
{
return MAY_LJMP(hlua_checkudata(L, ud, class_txn_ref));
}
__LJMP static int hlua_set_var(lua_State *L)
{
struct hlua_txn *htxn;
const char *name;
size_t len;
struct sample smp;
MAY_LJMP(check_args(L, 3, "set_var"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
htxn = MAY_LJMP(hlua_checktxn(L, 1));
name = MAY_LJMP(luaL_checklstring(L, 2, &len));
/* Converts the third argument in a sample. */
hlua_lua2smp(L, 3, &smp);
/* Store the sample in a variable. */
smp_set_owner(&smp, htxn->p, htxn->s->sess, htxn->s, htxn->dir & SMP_OPT_DIR);
vars_set_by_name(name, len, &smp);
return 0;
}
__LJMP static int hlua_unset_var(lua_State *L)
{
struct hlua_txn *htxn;
const char *name;
size_t len;
struct sample smp;
MAY_LJMP(check_args(L, 2, "unset_var"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
htxn = MAY_LJMP(hlua_checktxn(L, 1));
name = MAY_LJMP(luaL_checklstring(L, 2, &len));
/* Unset the variable. */
smp_set_owner(&smp, htxn->p, htxn->s->sess, htxn->s, htxn->dir & SMP_OPT_DIR);
vars_unset_by_name(name, len, &smp);
return 0;
}
__LJMP static int hlua_get_var(lua_State *L)
{
struct hlua_txn *htxn;
const char *name;
size_t len;
struct sample smp;
MAY_LJMP(check_args(L, 2, "get_var"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
htxn = MAY_LJMP(hlua_checktxn(L, 1));
name = MAY_LJMP(luaL_checklstring(L, 2, &len));
smp_set_owner(&smp, htxn->p, htxn->s->sess, htxn->s, htxn->dir & SMP_OPT_DIR);
if (!vars_get_by_name(name, len, &smp)) {
lua_pushnil(L);
return 1;
}
return hlua_smp2lua(L, &smp);
}
__LJMP static int hlua_set_priv(lua_State *L)
{
struct hlua *hlua;
MAY_LJMP(check_args(L, 2, "set_priv"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
MAY_LJMP(hlua_checktxn(L, 1));
hlua = hlua_gethlua(L);
/* Remove previous value. */
luaL_unref(L, LUA_REGISTRYINDEX, hlua->Mref);
/* Get and store new value. */
lua_pushvalue(L, 2); /* Copy the element 2 at the top of the stack. */
hlua->Mref = luaL_ref(L, LUA_REGISTRYINDEX); /* pop the previously pushed value. */
return 0;
}
__LJMP static int hlua_get_priv(lua_State *L)
{
struct hlua *hlua;
MAY_LJMP(check_args(L, 1, "get_priv"));
/* It is useles to retrieve the stream, but this function
* runs only in a stream context.
*/
MAY_LJMP(hlua_checktxn(L, 1));
hlua = hlua_gethlua(L);
/* Push configuration index in the stack. */
lua_rawgeti(L, LUA_REGISTRYINDEX, hlua->Mref);
return 1;
}
/* Create stack entry containing a class TXN. This function
* return 0 if the stack does not contains free slots,
* otherwise it returns 1.
*/
static int hlua_txn_new(lua_State *L, struct stream *s, struct proxy *p, int dir, int flags)
{
struct hlua_txn *htxn;
/* Check stack size. */
if (!lua_checkstack(L, 3))
return 0;
/* NOTE: The allocation never fails. The failure
* throw an error, and the function never returns.
* if the throw is not avalaible, the process is aborted.
*/
/* Create the object: obj[0] = userdata. */
lua_newtable(L);
htxn = lua_newuserdata(L, sizeof(*htxn));
lua_rawseti(L, -2, 0);
htxn->s = s;
htxn->p = p;
htxn->dir = dir;
htxn->flags = flags;
/* Create the "f" field that contains a list of fetches. */
lua_pushstring(L, "f");
if (!hlua_fetches_new(L, htxn, HLUA_F_MAY_USE_HTTP))
return 0;
lua_rawset(L, -3);
/* Create the "sf" field that contains a list of stringsafe fetches. */
lua_pushstring(L, "sf");
if (!hlua_fetches_new(L, htxn, HLUA_F_MAY_USE_HTTP | HLUA_F_AS_STRING))
return 0;
lua_rawset(L, -3);
/* Create the "c" field that contains a list of converters. */
lua_pushstring(L, "c");
if (!hlua_converters_new(L, htxn, 0))
return 0;
lua_rawset(L, -3);
/* Create the "sc" field that contains a list of stringsafe converters. */
lua_pushstring(L, "sc");
if (!hlua_converters_new(L, htxn, HLUA_F_AS_STRING))
return 0;
lua_rawset(L, -3);
/* Create the "req" field that contains the request channel object. */
lua_pushstring(L, "req");
if (!hlua_channel_new(L, &s->req))
return 0;
lua_rawset(L, -3);
/* Create the "res" field that contains the response channel object. */
lua_pushstring(L, "res");
if (!hlua_channel_new(L, &s->res))
return 0;
lua_rawset(L, -3);
/* Creates the HTTP object is the current proxy allows http. */
lua_pushstring(L, "http");
if (p->mode == PR_MODE_HTTP) {
if (!hlua_http_new(L, htxn))
return 0;
}
else
lua_pushnil(L);
lua_rawset(L, -3);
/* Pop a class sesison metatable and affect it to the userdata. */
lua_rawgeti(L, LUA_REGISTRYINDEX, class_txn_ref);
lua_setmetatable(L, -2);
return 1;
}
__LJMP static int hlua_txn_deflog(lua_State *L)
{
const char *msg;
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 2, "deflog"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
msg = MAY_LJMP(luaL_checkstring(L, 2));
hlua_sendlog(htxn->s->be, htxn->s->logs.level, msg);
return 0;
}
__LJMP static int hlua_txn_log(lua_State *L)
{
int level;
const char *msg;
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 3, "log"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
level = MAY_LJMP(luaL_checkinteger(L, 2));
msg = MAY_LJMP(luaL_checkstring(L, 3));
if (level < 0 || level >= NB_LOG_LEVELS)
WILL_LJMP(luaL_argerror(L, 1, "Invalid loglevel."));
hlua_sendlog(htxn->s->be, level, msg);
return 0;
}
__LJMP static int hlua_txn_log_debug(lua_State *L)
{
const char *msg;
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 2, "Debug"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
msg = MAY_LJMP(luaL_checkstring(L, 2));
hlua_sendlog(htxn->s->be, LOG_DEBUG, msg);
return 0;
}
__LJMP static int hlua_txn_log_info(lua_State *L)
{
const char *msg;
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 2, "Info"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
msg = MAY_LJMP(luaL_checkstring(L, 2));
hlua_sendlog(htxn->s->be, LOG_INFO, msg);
return 0;
}
__LJMP static int hlua_txn_log_warning(lua_State *L)
{
const char *msg;
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 2, "Warning"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
msg = MAY_LJMP(luaL_checkstring(L, 2));
hlua_sendlog(htxn->s->be, LOG_WARNING, msg);
return 0;
}
__LJMP static int hlua_txn_log_alert(lua_State *L)
{
const char *msg;
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 2, "Alert"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
msg = MAY_LJMP(luaL_checkstring(L, 2));
hlua_sendlog(htxn->s->be, LOG_ALERT, msg);
return 0;
}
__LJMP static int hlua_txn_set_loglevel(lua_State *L)
{
struct hlua_txn *htxn;
int ll;
MAY_LJMP(check_args(L, 2, "set_loglevel"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
ll = MAY_LJMP(luaL_checkinteger(L, 2));
if (ll < 0 || ll > 7)
WILL_LJMP(luaL_argerror(L, 2, "Bad log level. It must be between 0 and 7"));
htxn->s->logs.level = ll;
return 0;
}
__LJMP static int hlua_txn_set_tos(lua_State *L)
{
struct hlua_txn *htxn;
struct connection *cli_conn;
int tos;
MAY_LJMP(check_args(L, 2, "set_tos"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
tos = MAY_LJMP(luaL_checkinteger(L, 2));
if ((cli_conn = objt_conn(htxn->s->sess->origin)) && conn_ctrl_ready(cli_conn))
inet_set_tos(cli_conn->handle.fd, &cli_conn->addr.from, tos);
return 0;
}
__LJMP static int hlua_txn_set_mark(lua_State *L)
{
#ifdef SO_MARK
struct hlua_txn *htxn;
struct connection *cli_conn;
int mark;
MAY_LJMP(check_args(L, 2, "set_mark"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
mark = MAY_LJMP(luaL_checkinteger(L, 2));
if ((cli_conn = objt_conn(htxn->s->sess->origin)) && conn_ctrl_ready(cli_conn))
setsockopt(cli_conn->handle.fd, SOL_SOCKET, SO_MARK, &mark, sizeof(mark));
#endif
return 0;
}
__LJMP static int hlua_txn_set_priority_class(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 2, "set_priority_class"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
htxn->s->priority_class = queue_limit_class(MAY_LJMP(luaL_checkinteger(L, 2)));
return 0;
}
__LJMP static int hlua_txn_set_priority_offset(lua_State *L)
{
struct hlua_txn *htxn;
MAY_LJMP(check_args(L, 2, "set_priority_offset"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
htxn->s->priority_offset = queue_limit_offset(MAY_LJMP(luaL_checkinteger(L, 2)));
return 0;
}
/* This function is an Lua binding that send pending data
* to the client, and close the stream interface.
*/
__LJMP static int hlua_txn_done(lua_State *L)
{
struct hlua_txn *htxn;
struct hlua *hlua;
struct channel *ic, *oc;
MAY_LJMP(check_args(L, 1, "close"));
htxn = MAY_LJMP(hlua_checktxn(L, 1));
hlua = hlua_gethlua(L);
/* If the flags NOTERM is set, we cannot terminate the http
* session, so we just end the execution of the current
* lua code.
*/
if (htxn->flags & HLUA_TXN_NOTERM) {
WILL_LJMP(hlua_done(L));
return 0;
}
ic = &htxn->s->req;
oc = &htxn->s->res;
if (htxn->s->txn) {
/* HTTP mode, let's stay in sync with the stream */
b_del(&ic->buf, htxn->s->txn->req.sov);
htxn->s->txn->req.next -= htxn->s->txn->req.sov;
htxn->s->txn->req.sov = 0;
ic->analysers &= AN_REQ_HTTP_XFER_BODY;
oc->analysers = AN_RES_HTTP_XFER_BODY;
htxn->s->txn->req.msg_state = HTTP_MSG_CLOSED;
htxn->s->txn->rsp.msg_state = HTTP_MSG_DONE;
/* Note that if we want to support keep-alive, we need
* to bypass the close/shutr_now calls below, but that
* may only be done if the HTTP request was already
* processed and the connection header is known (ie
* not during TCP rules).
*/
}
channel_auto_read(ic);
channel_abort(ic);
channel_auto_close(ic);
channel_erase(ic);
oc->wex = tick_add_ifset(now_ms, oc->wto);
channel_auto_read(oc);
channel_auto_close(oc);
channel_shutr_now(oc);
ic->analysers = 0;
hlua->flags |= HLUA_STOP;
WILL_LJMP(hlua_done(L));
return 0;
}
__LJMP static int hlua_log(lua_State *L)
{
int level;
const char *msg;
MAY_LJMP(check_args(L, 2, "log"));
level = MAY_LJMP(luaL_checkinteger(L, 1));
msg = MAY_LJMP(luaL_checkstring(L, 2));
if (level < 0 || level >= NB_LOG_LEVELS)
WILL_LJMP(luaL_argerror(L, 1, "Invalid loglevel."));
hlua_sendlog(NULL, level, msg);
return 0;
}
__LJMP static int hlua_log_debug(lua_State *L)
{
const char *msg;
MAY_LJMP(check_args(L, 1, "debug"));
msg = MAY_LJMP(luaL_checkstring(L, 1));
hlua_sendlog(NULL, LOG_DEBUG, msg);
return 0;
}
__LJMP static int hlua_log_info(lua_State *L)
{
const char *msg;
MAY_LJMP(check_args(L, 1, "info"));
msg = MAY_LJMP(luaL_checkstring(L, 1));
hlua_sendlog(NULL, LOG_INFO, msg);
return 0;
}
__LJMP static int hlua_log_warning(lua_State *L)
{
const char *msg;
MAY_LJMP(check_args(L, 1, "warning"));
msg = MAY_LJMP(luaL_checkstring(L, 1));
hlua_sendlog(NULL, LOG_WARNING, msg);
return 0;
}
__LJMP static int hlua_log_alert(lua_State *L)
{
const char *msg;
MAY_LJMP(check_args(L, 1, "alert"));
msg = MAY_LJMP(luaL_checkstring(L, 1));
hlua_sendlog(NULL, LOG_ALERT, msg);
return 0;
}
__LJMP static int hlua_sleep_yield(lua_State *L, int status, lua_KContext ctx)
{
int wakeup_ms = lua_tointeger(L, -1);
if (now_ms < wakeup_ms)
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_sleep_yield, wakeup_ms, 0));
return 0;
}
__LJMP static int hlua_sleep(lua_State *L)
{
unsigned int delay;
unsigned int wakeup_ms;
MAY_LJMP(check_args(L, 1, "sleep"));
delay = MAY_LJMP(luaL_checkinteger(L, 1)) * 1000;
wakeup_ms = tick_add(now_ms, delay);
lua_pushinteger(L, wakeup_ms);
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_sleep_yield, wakeup_ms, 0));
return 0;
}
__LJMP static int hlua_msleep(lua_State *L)
{
unsigned int delay;
unsigned int wakeup_ms;
MAY_LJMP(check_args(L, 1, "msleep"));
delay = MAY_LJMP(luaL_checkinteger(L, 1));
wakeup_ms = tick_add(now_ms, delay);
lua_pushinteger(L, wakeup_ms);
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_sleep_yield, wakeup_ms, 0));
return 0;
}
/* This functionis an LUA binding. it permits to give back
* the hand at the HAProxy scheduler. It is used when the
* LUA processing consumes a lot of time.
*/
__LJMP static int hlua_yield_yield(lua_State *L, int status, lua_KContext ctx)
{
return 0;
}
__LJMP static int hlua_yield(lua_State *L)
{
WILL_LJMP(hlua_yieldk(L, 0, 0, hlua_yield_yield, TICK_ETERNITY, HLUA_CTRLYIELD));
return 0;
}
/* This function change the nice of the currently executed
* task. It is used set low or high priority at the current
* task.
*/
__LJMP static int hlua_set_nice(lua_State *L)
{
struct hlua *hlua;
int nice;
MAY_LJMP(check_args(L, 1, "set_nice"));
hlua = hlua_gethlua(L);
nice = MAY_LJMP(luaL_checkinteger(L, 1));
/* If he task is not set, I'm in a start mode. */
if (!hlua || !hlua->task)
return 0;
if (nice < -1024)
nice = -1024;
else if (nice > 1024)
nice = 1024;
hlua->task->nice = nice;
return 0;
}
/* This function is used as a calback of a task. It is called by the
* HAProxy task subsystem when the task is awaked. The LUA runtime can
* return an E_AGAIN signal, the emmiter of this signal must set a
* signal to wake the task.
*
* Task wrapper are longjmp safe because the only one Lua code
* executed is the safe hlua_ctx_resume();
*/
static struct task *hlua_process_task(struct task *task, void *context, unsigned short state)
{
struct hlua *hlua = context;
enum hlua_exec status;
if (task->thread_mask == MAX_THREADS_MASK)
task_set_affinity(task, tid_bit);
/* If it is the first call to the task, we must initialize the
* execution timeouts.
*/
if (!HLUA_IS_RUNNING(hlua))
hlua->max_time = hlua_timeout_task;
/* Execute the Lua code. */
status = hlua_ctx_resume(hlua, 1);
switch (status) {
/* finished or yield */
case HLUA_E_OK:
hlua_ctx_destroy(hlua);
task_delete(task);
task_free(task);
task = NULL;
break;
case HLUA_E_AGAIN: /* co process or timeout wake me later. */
notification_gc(&hlua->com);
task->expire = hlua->wake_time;
break;
/* finished with error. */
case HLUA_E_ERRMSG:
SEND_ERR(NULL, "Lua task: %s.\n", lua_tostring(hlua->T, -1));
hlua_ctx_destroy(hlua);
task_delete(task);
task_free(task);
task = NULL;
break;
case HLUA_E_ERR:
default:
SEND_ERR(NULL, "Lua task: unknown error.\n");
hlua_ctx_destroy(hlua);
task_delete(task);
task_free(task);
task = NULL;
break;
}
return task;
}
/* This function is an LUA binding that register LUA function to be
* executed after the HAProxy configuration parsing and before the
* HAProxy scheduler starts. This function expect only one LUA
* argument that is a function. This function returns nothing, but
* throws if an error is encountered.
*/
__LJMP static int hlua_register_init(lua_State *L)
{
struct hlua_init_function *init;
int ref;
MAY_LJMP(check_args(L, 1, "register_init"));
ref = MAY_LJMP(hlua_checkfunction(L, 1));
init = calloc(1, sizeof(*init));
if (!init)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
init->function_ref = ref;
LIST_ADDQ(&hlua_init_functions, &init->l);
return 0;
}
/* This functio is an LUA binding. It permits to register a task
* executed in parallel of the main HAroxy activity. The task is
* created and it is set in the HAProxy scheduler. It can be called
* from the "init" section, "post init" or during the runtime.
*
* Lua prototype:
*
* <none> core.register_task(<function>)
*/
static int hlua_register_task(lua_State *L)
{
struct hlua *hlua;
struct task *task;
int ref;
MAY_LJMP(check_args(L, 1, "register_task"));
ref = MAY_LJMP(hlua_checkfunction(L, 1));
hlua = pool_alloc(pool_head_hlua);
if (!hlua)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
task = task_new(MAX_THREADS_MASK);
task->context = hlua;
task->process = hlua_process_task;
if (!hlua_ctx_init(hlua, task))
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
/* Restore the function in the stack. */
lua_rawgeti(hlua->T, LUA_REGISTRYINDEX, ref);
hlua->nargs = 0;
/* Schedule task. */
task_schedule(task, now_ms);
return 0;
}
/* Wrapper called by HAProxy to execute an LUA converter. This wrapper
* doesn't allow "yield" functions because the HAProxy engine cannot
* resume converters.
*/
static int hlua_sample_conv_wrapper(const struct arg *arg_p, struct sample *smp, void *private)
{
struct hlua_function *fcn = private;
struct stream *stream = smp->strm;
const char *error;
if (!stream)
return 0;
/* In the execution wrappers linked with a stream, the
* Lua context can be not initialized. This behavior
* permits to save performances because a systematic
* Lua initialization cause 5% performances loss.
*/
if (!stream->hlua) {
stream->hlua = pool_alloc(pool_head_hlua);
if (!stream->hlua) {
SEND_ERR(stream->be, "Lua converter '%s': can't initialize Lua context.\n", fcn->name);
return 0;
}
if (!hlua_ctx_init(stream->hlua, stream->task)) {
SEND_ERR(stream->be, "Lua converter '%s': can't initialize Lua context.\n", fcn->name);
return 0;
}
}
/* If it is the first run, initialize the data for the call. */
if (!HLUA_IS_RUNNING(stream->hlua)) {
/* The following Lua calls can fail. */
if (!SET_SAFE_LJMP(stream->hlua->T)) {
if (lua_type(stream->hlua->T, -1) == LUA_TSTRING)
error = lua_tostring(stream->hlua->T, -1);
else
error = "critical error";
SEND_ERR(stream->be, "Lua converter '%s': %s.\n", fcn->name, error);
return 0;
}
/* Check stack available size. */
if (!lua_checkstack(stream->hlua->T, 1)) {
SEND_ERR(stream->be, "Lua converter '%s': full stack.\n", fcn->name);
RESET_SAFE_LJMP(stream->hlua->T);
return 0;
}
/* Restore the function in the stack. */
lua_rawgeti(stream->hlua->T, LUA_REGISTRYINDEX, fcn->function_ref);
/* convert input sample and pust-it in the stack. */
if (!lua_checkstack(stream->hlua->T, 1)) {
SEND_ERR(stream->be, "Lua converter '%s': full stack.\n", fcn->name);
RESET_SAFE_LJMP(stream->hlua->T);
return 0;
}
hlua_smp2lua(stream->hlua->T, smp);
stream->hlua->nargs = 1;
/* push keywords in the stack. */
if (arg_p) {
for (; arg_p->type != ARGT_STOP; arg_p++) {
if (!lua_checkstack(stream->hlua->T, 1)) {
SEND_ERR(stream->be, "Lua converter '%s': full stack.\n", fcn->name);
RESET_SAFE_LJMP(stream->hlua->T);
return 0;
}
hlua_arg2lua(stream->hlua->T, arg_p);
stream->hlua->nargs++;
}
}
/* We must initialize the execution timeouts. */
stream->hlua->max_time = hlua_timeout_session;
/* At this point the execution is safe. */
RESET_SAFE_LJMP(stream->hlua->T);
}
/* Execute the function. */
switch (hlua_ctx_resume(stream->hlua, 0)) {
/* finished. */
case HLUA_E_OK:
/* If the stack is empty, the function fails. */
if (lua_gettop(stream->hlua->T) <= 0)
return 0;
/* Convert the returned value in sample. */
hlua_lua2smp(stream->hlua->T, -1, smp);
lua_pop(stream->hlua->T, 1);
return 1;
/* yield. */
case HLUA_E_AGAIN:
SEND_ERR(stream->be, "Lua converter '%s': cannot use yielded functions.\n", fcn->name);
return 0;
/* finished with error. */
case HLUA_E_ERRMSG:
/* Display log. */
SEND_ERR(stream->be, "Lua converter '%s': %s.\n",
fcn->name, lua_tostring(stream->hlua->T, -1));
lua_pop(stream->hlua->T, 1);
return 0;
case HLUA_E_ETMOUT:
SEND_ERR(stream->be, "Lua converter '%s': execution timeout.\n", fcn->name);
return 0;
case HLUA_E_NOMEM:
SEND_ERR(stream->be, "Lua converter '%s': out of memory error.\n", fcn->name);
return 0;
case HLUA_E_YIELD:
SEND_ERR(stream->be, "Lua converter '%s': yield functions like core.tcp() or core.sleep() are not allowed.\n", fcn->name);
return 0;
case HLUA_E_ERR:
/* Display log. */
SEND_ERR(stream->be, "Lua converter '%s' returns an unknown error.\n", fcn->name);
default:
return 0;
}
}
/* Wrapper called by HAProxy to execute a sample-fetch. this wrapper
* doesn't allow "yield" functions because the HAProxy engine cannot
* resume sample-fetches. This function will be called by the sample
* fetch engine to call lua-based fetch operations.
*/
static int hlua_sample_fetch_wrapper(const struct arg *arg_p, struct sample *smp,
const char *kw, void *private)
{
struct hlua_function *fcn = private;
struct stream *stream = smp->strm;
const char *error;
const struct buffer msg = { };
if (!stream)
return 0;
/* In the execution wrappers linked with a stream, the
* Lua context can be not initialized. This behavior
* permits to save performances because a systematic
* Lua initialization cause 5% performances loss.
*/
if (!stream->hlua) {
stream->hlua = pool_alloc(pool_head_hlua);
if (!stream->hlua) {
SEND_ERR(stream->be, "Lua sample-fetch '%s': can't initialize Lua context.\n", fcn->name);
return 0;
}
if (!hlua_ctx_init(stream->hlua, stream->task)) {
SEND_ERR(stream->be, "Lua sample-fetch '%s': can't initialize Lua context.\n", fcn->name);
return 0;
}
}
consistency_set(stream, smp->opt, &stream->hlua->cons);
/* If it is the first run, initialize the data for the call. */
if (!HLUA_IS_RUNNING(stream->hlua)) {
/* The following Lua calls can fail. */
if (!SET_SAFE_LJMP(stream->hlua->T)) {
if (lua_type(stream->hlua->T, -1) == LUA_TSTRING)
error = lua_tostring(stream->hlua->T, -1);
else
error = "critical error";
SEND_ERR(smp->px, "Lua sample-fetch '%s': %s.\n", fcn->name, error);
return 0;
}
/* Check stack available size. */
if (!lua_checkstack(stream->hlua->T, 2)) {
SEND_ERR(smp->px, "Lua sample-fetch '%s': full stack.\n", fcn->name);
RESET_SAFE_LJMP(stream->hlua->T);
return 0;
}
/* Restore the function in the stack. */
lua_rawgeti(stream->hlua->T, LUA_REGISTRYINDEX, fcn->function_ref);
/* push arguments in the stack. */
if (!hlua_txn_new(stream->hlua->T, stream, smp->px, smp->opt & SMP_OPT_DIR,
HLUA_TXN_NOTERM)) {
SEND_ERR(smp->px, "Lua sample-fetch '%s': full stack.\n", fcn->name);
RESET_SAFE_LJMP(stream->hlua->T);
return 0;
}
stream->hlua->nargs = 1;
/* push keywords in the stack. */
for (; arg_p && arg_p->type != ARGT_STOP; arg_p++) {
/* Check stack available size. */
if (!lua_checkstack(stream->hlua->T, 1)) {
SEND_ERR(smp->px, "Lua sample-fetch '%s': full stack.\n", fcn->name);
RESET_SAFE_LJMP(stream->hlua->T);
return 0;
}
hlua_arg2lua(stream->hlua->T, arg_p);
stream->hlua->nargs++;
}
/* We must initialize the execution timeouts. */
stream->hlua->max_time = hlua_timeout_session;
/* At this point the execution is safe. */
RESET_SAFE_LJMP(stream->hlua->T);
}
/* Execute the function. */
switch (hlua_ctx_resume(stream->hlua, 0)) {
/* finished. */
case HLUA_E_OK:
if (!consistency_check(stream, smp->opt, &stream->hlua->cons)) {
stream_int_retnclose(&stream->si[0], &msg);
return 0;
}
/* If the stack is empty, the function fails. */
if (lua_gettop(stream->hlua->T) <= 0)
return 0;
/* Convert the returned value in sample. */
hlua_lua2smp(stream->hlua->T, -1, smp);
lua_pop(stream->hlua->T, 1);
/* Set the end of execution flag. */
smp->flags &= ~SMP_F_MAY_CHANGE;
return 1;
/* yield. */
case HLUA_E_AGAIN:
if (!consistency_check(stream, smp->opt, &stream->hlua->cons))
stream_int_retnclose(&stream->si[0], &msg);
SEND_ERR(smp->px, "Lua sample-fetch '%s': cannot use yielded functions.\n", fcn->name);
return 0;
/* finished with error. */
case HLUA_E_ERRMSG:
if (!consistency_check(stream, smp->opt, &stream->hlua->cons))
stream_int_retnclose(&stream->si[0], &msg);
/* Display log. */
SEND_ERR(smp->px, "Lua sample-fetch '%s': %s.\n",
fcn->name, lua_tostring(stream->hlua->T, -1));
lua_pop(stream->hlua->T, 1);
return 0;
case HLUA_E_ETMOUT:
if (!consistency_check(stream, smp->opt, &stream->hlua->cons))
stream_int_retnclose(&stream->si[0], &msg);
SEND_ERR(smp->px, "Lua sample-fetch '%s': execution timeout.\n", fcn->name);
return 0;
case HLUA_E_NOMEM:
if (!consistency_check(stream, smp->opt, &stream->hlua->cons))
stream_int_retnclose(&stream->si[0], &msg);
SEND_ERR(smp->px, "Lua sample-fetch '%s': out of memory error.\n", fcn->name);
return 0;
case HLUA_E_YIELD:
if (!consistency_check(stream, smp->opt, &stream->hlua->cons))
stream_int_retnclose(&stream->si[0], &msg);
SEND_ERR(smp->px, "Lua sample-fetch '%s': yield not allowed.\n", fcn->name);
return 0;
case HLUA_E_ERR:
if (!consistency_check(stream, smp->opt, &stream->hlua->cons))
stream_int_retnclose(&stream->si[0], &msg);
/* Display log. */
SEND_ERR(smp->px, "Lua sample-fetch '%s' returns an unknown error.\n", fcn->name);
default:
return 0;
}
}
/* This function is an LUA binding used for registering
* "sample-conv" functions. It expects a converter name used
* in the haproxy configuration file, and an LUA function.
*/
__LJMP static int hlua_register_converters(lua_State *L)
{
struct sample_conv_kw_list *sck;
const char *name;
int ref;
int len;
struct hlua_function *fcn;
MAY_LJMP(check_args(L, 2, "register_converters"));
/* First argument : converter name. */
name = MAY_LJMP(luaL_checkstring(L, 1));
/* Second argument : lua function. */
ref = MAY_LJMP(hlua_checkfunction(L, 2));
/* Allocate and fill the sample fetch keyword struct. */
sck = calloc(1, sizeof(*sck) + sizeof(struct sample_conv) * 2);
if (!sck)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
fcn = calloc(1, sizeof(*fcn));
if (!fcn)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
/* Fill fcn. */
fcn->name = strdup(name);
if (!fcn->name)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
fcn->function_ref = ref;
/* List head */
sck->list.n = sck->list.p = NULL;
/* converter keyword. */
len = strlen("lua.") + strlen(name) + 1;
sck->kw[0].kw = calloc(1, len);
if (!sck->kw[0].kw)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
snprintf((char *)sck->kw[0].kw, len, "lua.%s", name);
sck->kw[0].process = hlua_sample_conv_wrapper;
sck->kw[0].arg_mask = ARG12(0,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR);
sck->kw[0].val_args = NULL;
sck->kw[0].in_type = SMP_T_STR;
sck->kw[0].out_type = SMP_T_STR;
sck->kw[0].private = fcn;
/* Register this new converter */
sample_register_convs(sck);
return 0;
}
/* This fucntion is an LUA binding used for registering
* "sample-fetch" functions. It expects a converter name used
* in the haproxy configuration file, and an LUA function.
*/
__LJMP static int hlua_register_fetches(lua_State *L)
{
const char *name;
int ref;
int len;
struct sample_fetch_kw_list *sfk;
struct hlua_function *fcn;
MAY_LJMP(check_args(L, 2, "register_fetches"));
/* First argument : sample-fetch name. */
name = MAY_LJMP(luaL_checkstring(L, 1));
/* Second argument : lua function. */
ref = MAY_LJMP(hlua_checkfunction(L, 2));
/* Allocate and fill the sample fetch keyword struct. */
sfk = calloc(1, sizeof(*sfk) + sizeof(struct sample_fetch) * 2);
if (!sfk)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
fcn = calloc(1, sizeof(*fcn));
if (!fcn)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
/* Fill fcn. */
fcn->name = strdup(name);
if (!fcn->name)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
fcn->function_ref = ref;
/* List head */
sfk->list.n = sfk->list.p = NULL;
/* sample-fetch keyword. */
len = strlen("lua.") + strlen(name) + 1;
sfk->kw[0].kw = calloc(1, len);
if (!sfk->kw[0].kw)
return luaL_error(L, "Lua out of memory error.");
snprintf((char *)sfk->kw[0].kw, len, "lua.%s", name);
sfk->kw[0].process = hlua_sample_fetch_wrapper;
sfk->kw[0].arg_mask = ARG12(0,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR);
sfk->kw[0].val_args = NULL;
sfk->kw[0].out_type = SMP_T_STR;
sfk->kw[0].use = SMP_USE_HTTP_ANY;
sfk->kw[0].val = 0;
sfk->kw[0].private = fcn;
/* Register this new fetch. */
sample_register_fetches(sfk);
return 0;
}
/* This function is a wrapper to execute each LUA function declared
* as an action wrapper during the initialisation period. This function
* return ACT_RET_CONT if the processing is finished (with or without
* error) and return ACT_RET_YIELD if the function must be called again
* because the LUA returns a yield.
*/
static enum act_return hlua_action(struct act_rule *rule, struct proxy *px,
struct session *sess, struct stream *s, int flags)
{
char **arg;
unsigned int analyzer;
int dir;
const char *error;
const struct buffer msg = { };
switch (rule->from) {
case ACT_F_TCP_REQ_CNT: analyzer = AN_REQ_INSPECT_FE ; dir = SMP_OPT_DIR_REQ; break;
case ACT_F_TCP_RES_CNT: analyzer = AN_RES_INSPECT ; dir = SMP_OPT_DIR_RES; break;
case ACT_F_HTTP_REQ: analyzer = AN_REQ_HTTP_PROCESS_FE; dir = SMP_OPT_DIR_REQ; break;
case ACT_F_HTTP_RES: analyzer = AN_RES_HTTP_PROCESS_BE; dir = SMP_OPT_DIR_RES; break;
default:
SEND_ERR(px, "Lua: internal error while execute action.\n");
return ACT_RET_CONT;
}
/* In the execution wrappers linked with a stream, the
* Lua context can be not initialized. This behavior
* permits to save performances because a systematic
* Lua initialization cause 5% performances loss.
*/
if (!s->hlua) {
s->hlua = pool_alloc(pool_head_hlua);
if (!s->hlua) {
SEND_ERR(px, "Lua action '%s': can't initialize Lua context.\n",
rule->arg.hlua_rule->fcn.name);
return ACT_RET_CONT;
}
if (!hlua_ctx_init(s->hlua, s->task)) {
SEND_ERR(px, "Lua action '%s': can't initialize Lua context.\n",
rule->arg.hlua_rule->fcn.name);
return ACT_RET_CONT;
}
}
consistency_set(s, dir, &s->hlua->cons);
/* If it is the first run, initialize the data for the call. */
if (!HLUA_IS_RUNNING(s->hlua)) {
/* The following Lua calls can fail. */
if (!SET_SAFE_LJMP(s->hlua->T)) {
if (lua_type(s->hlua->T, -1) == LUA_TSTRING)
error = lua_tostring(s->hlua->T, -1);
else
error = "critical error";
SEND_ERR(px, "Lua function '%s': %s.\n",
rule->arg.hlua_rule->fcn.name, error);
return ACT_RET_CONT;
}
/* Check stack available size. */
if (!lua_checkstack(s->hlua->T, 1)) {
SEND_ERR(px, "Lua function '%s': full stack.\n",
rule->arg.hlua_rule->fcn.name);
RESET_SAFE_LJMP(s->hlua->T);
return ACT_RET_CONT;
}
/* Restore the function in the stack. */
lua_rawgeti(s->hlua->T, LUA_REGISTRYINDEX, rule->arg.hlua_rule->fcn.function_ref);
/* Create and and push object stream in the stack. */
if (!hlua_txn_new(s->hlua->T, s, px, dir, 0)) {
SEND_ERR(px, "Lua function '%s': full stack.\n",
rule->arg.hlua_rule->fcn.name);
RESET_SAFE_LJMP(s->hlua->T);
return ACT_RET_CONT;
}
s->hlua->nargs = 1;
/* push keywords in the stack. */
for (arg = rule->arg.hlua_rule->args; arg && *arg; arg++) {
if (!lua_checkstack(s->hlua->T, 1)) {
SEND_ERR(px, "Lua function '%s': full stack.\n",
rule->arg.hlua_rule->fcn.name);
RESET_SAFE_LJMP(s->hlua->T);
return ACT_RET_CONT;
}
lua_pushstring(s->hlua->T, *arg);
s->hlua->nargs++;
}
/* Now the execution is safe. */
RESET_SAFE_LJMP(s->hlua->T);
/* We must initialize the execution timeouts. */
s->hlua->max_time = hlua_timeout_session;
}
/* Execute the function. */
switch (hlua_ctx_resume(s->hlua, !(flags & ACT_FLAG_FINAL))) {
/* finished. */
case HLUA_E_OK:
if (!consistency_check(s, dir, &s->hlua->cons)) {
stream_int_retnclose(&s->si[0], &msg);
return ACT_RET_ERR;
}
if (s->hlua->flags & HLUA_STOP)
return ACT_RET_STOP;
return ACT_RET_CONT;
/* yield. */
case HLUA_E_AGAIN:
/* Set timeout in the required channel. */
if (s->hlua->wake_time != TICK_ETERNITY) {
if (analyzer & (AN_REQ_INSPECT_FE|AN_REQ_HTTP_PROCESS_FE))
s->req.analyse_exp = s->hlua->wake_time;
else if (analyzer & (AN_RES_INSPECT|AN_RES_HTTP_PROCESS_BE))
s->res.analyse_exp = s->hlua->wake_time;
}
/* Some actions can be wake up when a "write" event
* is detected on a response channel. This is useful
* only for actions targetted on the requests.
*/
if (HLUA_IS_WAKERESWR(s->hlua)) {
s->res.flags |= CF_WAKE_WRITE;
if ((analyzer & (AN_REQ_INSPECT_FE|AN_REQ_HTTP_PROCESS_FE)))
s->res.analysers |= analyzer;
}
if (HLUA_IS_WAKEREQWR(s->hlua))
s->req.flags |= CF_WAKE_WRITE;
/* We can quit the fcuntion without consistency check
* because HAProxy is not able to manipulate data, it
* is only allowed to call me again. */
return ACT_RET_YIELD;
/* finished with error. */
case HLUA_E_ERRMSG:
if (!consistency_check(s, dir, &s->hlua->cons)) {
stream_int_retnclose(&s->si[0], &msg);
return ACT_RET_ERR;
}
/* Display log. */
SEND_ERR(px, "Lua function '%s': %s.\n",
rule->arg.hlua_rule->fcn.name, lua_tostring(s->hlua->T, -1));
lua_pop(s->hlua->T, 1);
return ACT_RET_CONT;
case HLUA_E_ETMOUT:
if (!consistency_check(s, dir, &s->hlua->cons)) {
stream_int_retnclose(&s->si[0], &msg);
return ACT_RET_ERR;
}
SEND_ERR(px, "Lua function '%s': execution timeout.\n", rule->arg.hlua_rule->fcn.name);
return 0;
case HLUA_E_NOMEM:
if (!consistency_check(s, dir, &s->hlua->cons)) {
stream_int_retnclose(&s->si[0], &msg);
return ACT_RET_ERR;
}
SEND_ERR(px, "Lua function '%s': out of memory error.\n", rule->arg.hlua_rule->fcn.name);
return 0;
case HLUA_E_YIELD:
if (!consistency_check(s, dir, &s->hlua->cons)) {
stream_int_retnclose(&s->si[0], &msg);
return ACT_RET_ERR;
}
SEND_ERR(px, "Lua function '%s': aborting Lua processing on expired timeout.\n",
rule->arg.hlua_rule->fcn.name);
return 0;
case HLUA_E_ERR:
if (!consistency_check(s, dir, &s->hlua->cons)) {
stream_int_retnclose(&s->si[0], &msg);
return ACT_RET_ERR;
}
/* Display log. */
SEND_ERR(px, "Lua function '%s' return an unknown error.\n",
rule->arg.hlua_rule->fcn.name);
default:
return ACT_RET_CONT;
}
}
struct task *hlua_applet_wakeup(struct task *t, void *context, unsigned short state)
{
struct appctx *ctx = context;
struct stream_interface *si = ctx->owner;
/* If the applet is wake up without any expected work, the sheduler
* remove it from the run queue. This flag indicate that the applet
* is waiting for write. If the buffer is full, the main processing
* will send some data and after call the applet, otherwise it call
* the applet ASAP.
*/
si_applet_cant_put(si);
appctx_wakeup(ctx);
t->expire = TICK_ETERNITY;
return t;
}
static int hlua_applet_tcp_init(struct appctx *ctx, struct proxy *px, struct stream *strm)
{
struct stream_interface *si = ctx->owner;
struct hlua *hlua;
struct task *task;
char **arg;
const char *error;
hlua = pool_alloc(pool_head_hlua);
if (!hlua) {
SEND_ERR(px, "Lua applet tcp '%s': out of memory.\n",
ctx->rule->arg.hlua_rule->fcn.name);
return 0;
}
HLUA_INIT(hlua);
ctx->ctx.hlua_apptcp.hlua = hlua;
ctx->ctx.hlua_apptcp.flags = 0;
/* Create task used by signal to wakeup applets. */
task = task_new(tid_bit);
if (!task) {
SEND_ERR(px, "Lua applet tcp '%s': out of memory.\n",
ctx->rule->arg.hlua_rule->fcn.name);
return 0;
}
task->nice = 0;
task->context = ctx;
task->process = hlua_applet_wakeup;
ctx->ctx.hlua_apptcp.task = task;
/* In the execution wrappers linked with a stream, the
* Lua context can be not initialized. This behavior
* permits to save performances because a systematic
* Lua initialization cause 5% performances loss.
*/
if (!hlua_ctx_init(hlua, task)) {
SEND_ERR(px, "Lua applet tcp '%s': can't initialize Lua context.\n",
ctx->rule->arg.hlua_rule->fcn.name);
return 0;
}
/* Set timeout according with the applet configuration. */
hlua->max_time = ctx->applet->timeout;
/* The following Lua calls can fail. */
if (!SET_SAFE_LJMP(hlua->T)) {
if (lua_type(hlua->T, -1) == LUA_TSTRING)
error = lua_tostring(hlua->T, -1);
else
error = "critical error";
SEND_ERR(px, "Lua applet tcp '%s': %s.\n",
ctx->rule->arg.hlua_rule->fcn.name, error);
return 0;
}
/* Check stack available size. */
if (!lua_checkstack(hlua->T, 1)) {
SEND_ERR(px, "Lua applet tcp '%s': full stack.\n",
ctx->rule->arg.hlua_rule->fcn.name);
RESET_SAFE_LJMP(hlua->T);
return 0;
}
/* Restore the function in the stack. */
lua_rawgeti(hlua->T, LUA_REGISTRYINDEX, ctx->rule->arg.hlua_rule->fcn.function_ref);
/* Create and and push object stream in the stack. */
if (!hlua_applet_tcp_new(hlua->T, ctx)) {
SEND_ERR(px, "Lua applet tcp '%s': full stack.\n",
ctx->rule->arg.hlua_rule->fcn.name);
RESET_SAFE_LJMP(hlua->T);
return 0;
}
hlua->nargs = 1;
/* push keywords in the stack. */
for (arg = ctx->rule->arg.hlua_rule->args; arg && *arg; arg++) {
if (!lua_checkstack(hlua->T, 1)) {
SEND_ERR(px, "Lua applet tcp '%s': full stack.\n",
ctx->rule->arg.hlua_rule->fcn.name);
RESET_SAFE_LJMP(hlua->T);
return 0;
}
lua_pushstring(hlua->T, *arg);
hlua->nargs++;
}
RESET_SAFE_LJMP(hlua->T);
/* Wakeup the applet ASAP. */
si_applet_cant_get(si);
si_applet_cant_put(si);
return 1;
}
static void hlua_applet_tcp_fct(struct appctx *ctx)
{
struct stream_interface *si = ctx->owner;
struct stream *strm = si_strm(si);
struct channel *res = si_ic(si);
struct act_rule *rule = ctx->rule;
struct proxy *px = strm->be;
struct hlua *hlua = ctx->ctx.hlua_apptcp.hlua;
/* The applet execution is already done. */
if (ctx->ctx.hlua_apptcp.flags & APPLET_DONE) {
/* eat the whole request */
co_skip(si_oc(si), co_data(si_oc(si)));
return;
}
/* If the stream is disconnect or closed, ldo nothing. */
if (unlikely(si->state == SI_ST_DIS || si->state == SI_ST_CLO))
return;
/* Execute the function. */
switch (hlua_ctx_resume(hlua, 1)) {
/* finished. */
case HLUA_E_OK:
ctx->ctx.hlua_apptcp.flags |= APPLET_DONE;
/* eat the whole request */
co_skip(si_oc(si), co_data(si_oc(si)));
res->flags |= CF_READ_NULL;
si_shutr(si);
return;
/* yield. */
case HLUA_E_AGAIN:
if (hlua->wake_time != TICK_ETERNITY)
task_schedule(ctx->ctx.hlua_apptcp.task, hlua->wake_time);
return;
/* finished with error. */
case HLUA_E_ERRMSG:
/* Display log. */
SEND_ERR(px, "Lua applet tcp '%s': %s.\n",
rule->arg.hlua_rule->fcn.name, lua_tostring(hlua->T, -1));
lua_pop(hlua->T, 1);
goto error;
case HLUA_E_ETMOUT:
SEND_ERR(px, "Lua applet tcp '%s': execution timeout.\n",
rule->arg.hlua_rule->fcn.name);
goto error;
case HLUA_E_NOMEM:
SEND_ERR(px, "Lua applet tcp '%s': out of memory error.\n",
rule->arg.hlua_rule->fcn.name);
goto error;
case HLUA_E_YIELD: /* unexpected */
SEND_ERR(px, "Lua applet tcp '%s': yield not allowed.\n",
rule->arg.hlua_rule->fcn.name);
goto error;
case HLUA_E_ERR:
/* Display log. */
SEND_ERR(px, "Lua applet tcp '%s' return an unknown error.\n",
rule->arg.hlua_rule->fcn.name);
goto error;
default:
goto error;
}
error:
/* For all other cases, just close the stream. */
si_shutw(si);
si_shutr(si);
ctx->ctx.hlua_apptcp.flags |= APPLET_DONE;
}
static void hlua_applet_tcp_release(struct appctx *ctx)
{
task_delete(ctx->ctx.hlua_apptcp.task);
task_free(ctx->ctx.hlua_apptcp.task);
ctx->ctx.hlua_apptcp.task = NULL;
hlua_ctx_destroy(ctx->ctx.hlua_apptcp.hlua);
ctx->ctx.hlua_apptcp.hlua = NULL;
}
/* The function returns 1 if the initialisation is complete, 0 if
* an errors occurs and -1 if more data are required for initializing
* the applet.
*/
static int hlua_applet_http_init(struct appctx *ctx, struct proxy *px, struct stream *strm)
{
struct stream_interface *si = ctx->owner;
struct channel *req = si_oc(si);
struct http_msg *msg;
struct http_txn *txn;
struct hlua *hlua;
char **arg;
struct hdr_ctx hdr;
struct task *task;
struct sample smp; /* just used for a valid call to smp_prefetch_http. */
const char *error;
/* Wait for a full HTTP request. */
if (!smp_prefetch_http(px, strm, 0, NULL, &smp, 0)) {
if (smp.flags & SMP_F_MAY_CHANGE)
return -1;
return 0;
}
txn = strm->txn;
msg = &txn->req;
/* We want two things in HTTP mode :
* - enforce server-close mode if we were in keep-alive, so that the
* applet is released after each response ;
* - enable request body transfer to the applet in order to resync
* with the response body.
*/
if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL)
txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_SCL;
hlua = pool_alloc(pool_head_hlua);
if (!hlua) {
SEND_ERR(px, "Lua applet http '%s': out of memory.\n",
ctx->rule->arg.hlua_rule->fcn.name);
return 0;
}
HLUA_INIT(hlua);
ctx->ctx.hlua_apphttp.hlua = hlua;
ctx->ctx.hlua_apphttp.left_bytes = -1;
ctx->ctx.hlua_apphttp.flags = 0;
if (txn->req.flags & HTTP_MSGF_VER_11)
ctx->ctx.hlua_apphttp.flags |= APPLET_HTTP11;
/* Create task used by signal to wakeup applets. */
task = task_new(tid_bit);
if (!task) {
SEND_ERR(px, "Lua applet http '%s': out of memory.\n",
ctx->rule->arg.hlua_rule->fcn.name);
return 0;
}
task->nice = 0;
task->context = ctx;
task->process = hlua_applet_wakeup;
ctx->ctx.hlua_apphttp.task = task;
/* In the execution wrappers linked with a stream, the
* Lua context can be not initialized. This behavior
* permits to save performances because a systematic
* Lua initialization cause 5% performances loss.
*/
if (!hlua_ctx_init(hlua, task)) {
SEND_ERR(px, "Lua applet http '%s': can't initialize Lua context.\n",
ctx->rule->arg.hlua_rule->fcn.name);
return 0;
}
/* Set timeout according with the applet configuration. */
hlua->max_time = ctx->applet->timeout;
/* The following Lua calls can fail. */
if (!SET_SAFE_LJMP(hlua->T)) {
if (lua_type(hlua->T, -1) == LUA_TSTRING)
error = lua_tostring(hlua->T, -1);
else
error = "critical error";
SEND_ERR(px, "Lua applet http '%s': %s.\n",
ctx->rule->arg.hlua_rule->fcn.name, error);
return 0;
}
/* Check stack available size. */
if (!lua_checkstack(hlua->T, 1)) {
SEND_ERR(px, "Lua applet http '%s': full stack.\n",
ctx->rule->arg.hlua_rule->fcn.name);
RESET_SAFE_LJMP(hlua->T);
return 0;
}
/* Restore the function in the stack. */
lua_rawgeti(hlua->T, LUA_REGISTRYINDEX, ctx->rule->arg.hlua_rule->fcn.function_ref);
/* Create and and push object stream in the stack. */
if (!hlua_applet_http_new(hlua->T, ctx)) {
SEND_ERR(px, "Lua applet http '%s': full stack.\n",
ctx->rule->arg.hlua_rule->fcn.name);
RESET_SAFE_LJMP(hlua->T);
return 0;
}
hlua->nargs = 1;
/* Look for a 100-continue expected. */
if (msg->flags & HTTP_MSGF_VER_11) {
hdr.idx = 0;
if (http_find_header2("Expect", 6, ci_head(req), &txn->hdr_idx, &hdr) &&
unlikely(hdr.vlen == 12 && strncasecmp(hdr.line+hdr.val, "100-continue", 12) == 0))
ctx->ctx.hlua_apphttp.flags |= APPLET_100C;
}
/* push keywords in the stack. */
for (arg = ctx->rule->arg.hlua_rule->args; arg && *arg; arg++) {
if (!lua_checkstack(hlua->T, 1)) {
SEND_ERR(px, "Lua applet http '%s': full stack.\n",
ctx->rule->arg.hlua_rule->fcn.name);
RESET_SAFE_LJMP(hlua->T);
return 0;
}
lua_pushstring(hlua->T, *arg);
hlua->nargs++;
}
RESET_SAFE_LJMP(hlua->T);
/* Wakeup the applet when data is ready for read. */
si_applet_cant_get(si);
return 1;
}
static void hlua_applet_http_fct(struct appctx *ctx)
{
struct stream_interface *si = ctx->owner;
struct stream *strm = si_strm(si);
struct channel *res = si_ic(si);
struct act_rule *rule = ctx->rule;
struct proxy *px = strm->be;
struct hlua *hlua = ctx->ctx.hlua_apphttp.hlua;
const char *blk1;
size_t len1;
const char *blk2;
size_t len2;
int ret;
/* If the stream is disconnect or closed, ldo nothing. */
if (unlikely(si->state == SI_ST_DIS || si->state == SI_ST_CLO))
return;
/* Set the currently running flag. */
if (!HLUA_IS_RUNNING(hlua) &&
!(ctx->ctx.hlua_apphttp.flags & APPLET_DONE)) {
/* Wait for full HTTP analysys. */
if (unlikely(strm->txn->req.msg_state < HTTP_MSG_BODY)) {
si_applet_cant_get(si);
return;
}
/* Store the max amount of bytes that we can read. */
ctx->ctx.hlua_apphttp.left_bytes = strm->txn->req.body_len;
/* We need to flush the request header. This left the body
* for the Lua.
*/
/* Read the maximum amount of data avalaible. */
ret = co_getblk_nc(si_oc(si), &blk1, &len1, &blk2, &len2);
if (ret == -1)
return;
/* No data available, ask for more data. */
if (ret == 1)
len2 = 0;
if (ret == 0)
len1 = 0;
if (len1 + len2 < strm->txn->req.eoh + strm->txn->req.eol) {
si_applet_cant_get(si);
return;
}
/* skip the requests bytes. */
co_skip(si_oc(si), strm->txn->req.eoh + strm->txn->req.eol);
}
/* Executes The applet if it is not done. */
if (!(ctx->ctx.hlua_apphttp.flags & APPLET_DONE)) {
/* Execute the function. */
switch (hlua_ctx_resume(hlua, 1)) {
/* finished. */
case HLUA_E_OK:
ctx->ctx.hlua_apphttp.flags |= APPLET_DONE;
break;
/* yield. */
case HLUA_E_AGAIN:
if (hlua->wake_time != TICK_ETERNITY)
task_schedule(ctx->ctx.hlua_apphttp.task, hlua->wake_time);
return;
/* finished with error. */
case HLUA_E_ERRMSG:
/* Display log. */
SEND_ERR(px, "Lua applet http '%s': %s.\n",
rule->arg.hlua_rule->fcn.name, lua_tostring(hlua->T, -1));
lua_pop(hlua->T, 1);
goto error;
case HLUA_E_ETMOUT:
SEND_ERR(px, "Lua applet http '%s': execution timeout.\n",
rule->arg.hlua_rule->fcn.name);
goto error;
case HLUA_E_NOMEM:
SEND_ERR(px, "Lua applet http '%s': out of memory error.\n",
rule->arg.hlua_rule->fcn.name);
goto error;
case HLUA_E_YIELD: /* unexpected */
SEND_ERR(px, "Lua applet http '%s': yield not allowed.\n",
rule->arg.hlua_rule->fcn.name);
goto error;
case HLUA_E_ERR:
/* Display log. */
SEND_ERR(px, "Lua applet http '%s' return an unknown error.\n",
rule->arg.hlua_rule->fcn.name);
goto error;
default:
goto error;
}
}
if (ctx->ctx.hlua_apphttp.flags & APPLET_DONE) {
/* We must send the final chunk. */
if (ctx->ctx.hlua_apphttp.flags & APPLET_CHUNKED &&
!(ctx->ctx.hlua_apphttp.flags & APPLET_LAST_CHK)) {
/* sent last chunk at once. */
ret = ci_putblk(res, "0\r\n\r\n", 5);
/* critical error. */
if (ret == -2 || ret == -3) {
SEND_ERR(px, "Lua applet http '%s'cannont send last chunk.\n",
rule->arg.hlua_rule->fcn.name);
goto error;
}
/* no enough space error. */
if (ret == -1) {
si_applet_cant_put(si);
return;
}
/* set the last chunk sent. */
ctx->ctx.hlua_apphttp.flags |= APPLET_LAST_CHK;
}
/* close the connection. */
/* status */
strm->txn->status = ctx->ctx.hlua_apphttp.status;
/* eat the whole request */
co_skip(si_oc(si), co_data(si_oc(si)));
res->flags |= CF_READ_NULL;
si_shutr(si);
return;
}
error:
/* If we are in HTTP mode, and we are not send any
* data, return a 500 server error in best effort:
* if there are no room avalaible in the buffer,
* just close the connection.
*/
ci_putblk(res, error_500, strlen(error_500));
if (!(strm->flags & SF_ERR_MASK))
strm->flags |= SF_ERR_RESOURCE;
si_shutw(si);
si_shutr(si);
ctx->ctx.hlua_apphttp.flags |= APPLET_DONE;
}
static void hlua_applet_http_release(struct appctx *ctx)
{
task_delete(ctx->ctx.hlua_apphttp.task);
task_free(ctx->ctx.hlua_apphttp.task);
ctx->ctx.hlua_apphttp.task = NULL;
hlua_ctx_destroy(ctx->ctx.hlua_apphttp.hlua);
ctx->ctx.hlua_apphttp.hlua = NULL;
}
/* global {tcp|http}-request parser. Return ACT_RET_PRS_OK in
* succes case, else return ACT_RET_PRS_ERR.
*
* This function can fail with an abort() due to an Lua critical error.
* We are in the configuration parsing process of HAProxy, this abort() is
* tolerated.
*/
static enum act_parse_ret action_register_lua(const char **args, int *cur_arg, struct proxy *px,
struct act_rule *rule, char **err)
{
struct hlua_function *fcn = rule->kw->private;
int i;
/* Memory for the rule. */
rule->arg.hlua_rule = calloc(1, sizeof(*rule->arg.hlua_rule));
if (!rule->arg.hlua_rule) {
memprintf(err, "out of memory error");
return ACT_RET_PRS_ERR;
}
/* Memory for arguments. */
rule->arg.hlua_rule->args = calloc(fcn->nargs + 1, sizeof(char *));
if (!rule->arg.hlua_rule->args) {
memprintf(err, "out of memory error");
return ACT_RET_PRS_ERR;
}
/* Reference the Lua function and store the reference. */
rule->arg.hlua_rule->fcn = *fcn;
/* Expect some arguments */
for (i = 0; i < fcn->nargs; i++) {
if (*args[i+1] == '\0') {
memprintf(err, "expect %d arguments", fcn->nargs);
return ACT_RET_PRS_ERR;
}
rule->arg.hlua_rule->args[i] = strdup(args[i + 1]);
if (!rule->arg.hlua_rule->args[i]) {
memprintf(err, "out of memory error");
return ACT_RET_PRS_ERR;
}
(*cur_arg)++;
}
rule->arg.hlua_rule->args[i] = NULL;
rule->action = ACT_CUSTOM;
rule->action_ptr = hlua_action;
return ACT_RET_PRS_OK;
}
static enum act_parse_ret action_register_service_http(const char **args, int *cur_arg, struct proxy *px,
struct act_rule *rule, char **err)
{
struct hlua_function *fcn = rule->kw->private;
/* HTTP applets are forbidden in tcp-request rules.
* HTTP applet request requires everything initilized by
* "http_process_request" (analyzer flag AN_REQ_HTTP_INNER).
* The applet will be immediately initilized, but its before
* the call of this analyzer.
*/
if (rule->from != ACT_F_HTTP_REQ) {
memprintf(err, "HTTP applets are forbidden from 'tcp-request' rulesets");
return ACT_RET_PRS_ERR;
}
/* Memory for the rule. */
rule->arg.hlua_rule = calloc(1, sizeof(*rule->arg.hlua_rule));
if (!rule->arg.hlua_rule) {
memprintf(err, "out of memory error");
return ACT_RET_PRS_ERR;
}
/* Reference the Lua function and store the reference. */
rule->arg.hlua_rule->fcn = *fcn;
/* TODO: later accept arguments. */
rule->arg.hlua_rule->args = NULL;
/* Add applet pointer in the rule. */
rule->applet.obj_type = OBJ_TYPE_APPLET;
rule->applet.name = fcn->name;
rule->applet.init = hlua_applet_http_init;
rule->applet.fct = hlua_applet_http_fct;
rule->applet.release = hlua_applet_http_release;
rule->applet.timeout = hlua_timeout_applet;
return ACT_RET_PRS_OK;
}
/* This function is an LUA binding used for registering
* "sample-conv" functions. It expects a converter name used
* in the haproxy configuration file, and an LUA function.
*/
__LJMP static int hlua_register_action(lua_State *L)
{
struct action_kw_list *akl;
const char *name;
int ref;
int len;
struct hlua_function *fcn;
int nargs;
/* Initialise the number of expected arguments at 0. */
nargs = 0;
if (lua_gettop(L) < 3 || lua_gettop(L) > 4)
WILL_LJMP(luaL_error(L, "'register_action' needs between 3 and 4 arguments"));
/* First argument : converter name. */
name = MAY_LJMP(luaL_checkstring(L, 1));
/* Second argument : environment. */
if (lua_type(L, 2) != LUA_TTABLE)
WILL_LJMP(luaL_error(L, "register_action: second argument must be a table of strings"));
/* Third argument : lua function. */
ref = MAY_LJMP(hlua_checkfunction(L, 3));
/* Fouth argument : number of mandatories arguments expected on the configuration line. */
if (lua_gettop(L) >= 4)
nargs = MAY_LJMP(luaL_checkinteger(L, 4));
/* browse the second argulent as an array. */
lua_pushnil(L);
while (lua_next(L, 2) != 0) {
if (lua_type(L, -1) != LUA_TSTRING)
WILL_LJMP(luaL_error(L, "register_action: second argument must be a table of strings"));
/* Check required environment. Only accepted "http" or "tcp". */
/* Allocate and fill the sample fetch keyword struct. */
akl = calloc(1, sizeof(*akl) + sizeof(struct action_kw) * 2);
if (!akl)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
fcn = calloc(1, sizeof(*fcn));
if (!fcn)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
/* Fill fcn. */
fcn->name = strdup(name);
if (!fcn->name)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
fcn->function_ref = ref;
/* Set the expected number od arguments. */
fcn->nargs = nargs;
/* List head */
akl->list.n = akl->list.p = NULL;
/* action keyword. */
len = strlen("lua.") + strlen(name) + 1;
akl->kw[0].kw = calloc(1, len);
if (!akl->kw[0].kw)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
snprintf((char *)akl->kw[0].kw, len, "lua.%s", name);
akl->kw[0].match_pfx = 0;
akl->kw[0].private = fcn;
akl->kw[0].parse = action_register_lua;
/* select the action registering point. */
if (strcmp(lua_tostring(L, -1), "tcp-req") == 0)
tcp_req_cont_keywords_register(akl);
else if (strcmp(lua_tostring(L, -1), "tcp-res") == 0)
tcp_res_cont_keywords_register(akl);
else if (strcmp(lua_tostring(L, -1), "http-req") == 0)
http_req_keywords_register(akl);
else if (strcmp(lua_tostring(L, -1), "http-res") == 0)
http_res_keywords_register(akl);
else
WILL_LJMP(luaL_error(L, "Lua action environment '%s' is unknown. "
"'tcp-req', 'tcp-res', 'http-req' or 'http-res' "
"are expected.", lua_tostring(L, -1)));
/* pop the environment string. */
lua_pop(L, 1);
}
return ACT_RET_PRS_OK;
}
static enum act_parse_ret action_register_service_tcp(const char **args, int *cur_arg, struct proxy *px,
struct act_rule *rule, char **err)
{
struct hlua_function *fcn = rule->kw->private;
/* Memory for the rule. */
rule->arg.hlua_rule = calloc(1, sizeof(*rule->arg.hlua_rule));
if (!rule->arg.hlua_rule) {
memprintf(err, "out of memory error");
return ACT_RET_PRS_ERR;
}
/* Reference the Lua function and store the reference. */
rule->arg.hlua_rule->fcn = *fcn;
/* TODO: later accept arguments. */
rule->arg.hlua_rule->args = NULL;
/* Add applet pointer in the rule. */
rule->applet.obj_type = OBJ_TYPE_APPLET;
rule->applet.name = fcn->name;
rule->applet.init = hlua_applet_tcp_init;
rule->applet.fct = hlua_applet_tcp_fct;
rule->applet.release = hlua_applet_tcp_release;
rule->applet.timeout = hlua_timeout_applet;
return 0;
}
/* This function is an LUA binding used for registering
* "sample-conv" functions. It expects a converter name used
* in the haproxy configuration file, and an LUA function.
*/
__LJMP static int hlua_register_service(lua_State *L)
{
struct action_kw_list *akl;
const char *name;
const char *env;
int ref;
int len;
struct hlua_function *fcn;
MAY_LJMP(check_args(L, 3, "register_service"));
/* First argument : converter name. */
name = MAY_LJMP(luaL_checkstring(L, 1));
/* Second argument : environment. */
env = MAY_LJMP(luaL_checkstring(L, 2));
/* Third argument : lua function. */
ref = MAY_LJMP(hlua_checkfunction(L, 3));
/* Allocate and fill the sample fetch keyword struct. */
akl = calloc(1, sizeof(*akl) + sizeof(struct action_kw) * 2);
if (!akl)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
fcn = calloc(1, sizeof(*fcn));
if (!fcn)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
/* Fill fcn. */
len = strlen("<lua.>") + strlen(name) + 1;
fcn->name = calloc(1, len);
if (!fcn->name)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
snprintf((char *)fcn->name, len, "<lua.%s>", name);
fcn->function_ref = ref;
/* List head */
akl->list.n = akl->list.p = NULL;
/* converter keyword. */
len = strlen("lua.") + strlen(name) + 1;
akl->kw[0].kw = calloc(1, len);
if (!akl->kw[0].kw)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
snprintf((char *)akl->kw[0].kw, len, "lua.%s", name);
/* Check required environment. Only accepted "http" or "tcp". */
if (strcmp(env, "tcp") == 0)
akl->kw[0].parse = action_register_service_tcp;
else if (strcmp(env, "http") == 0)
akl->kw[0].parse = action_register_service_http;
else
WILL_LJMP(luaL_error(L, "Lua service environment '%s' is unknown. "
"'tcp' or 'http' are expected.", env));
akl->kw[0].match_pfx = 0;
akl->kw[0].private = fcn;
/* End of array. */
memset(&akl->kw[1], 0, sizeof(*akl->kw));
/* Register this new converter */
service_keywords_register(akl);
return 0;
}
/* This function initialises Lua cli handler. It copies the
* arguments in the Lua stack and create channel IO objects.
*/
static int hlua_cli_parse_fct(char **args, char *payload, struct appctx *appctx, void *private)
{
struct hlua *hlua;
struct hlua_function *fcn;
int i;
const char *error;
fcn = private;
appctx->ctx.hlua_cli.fcn = private;
hlua = pool_alloc(pool_head_hlua);
if (!hlua) {
SEND_ERR(NULL, "Lua cli '%s': out of memory.\n", fcn->name);
return 1;
}
HLUA_INIT(hlua);
appctx->ctx.hlua_cli.hlua = hlua;
/* Create task used by signal to wakeup applets.
* We use the same wakeup fonction than the Lua applet_tcp and
* applet_http. It is absolutely compatible.
*/
appctx->ctx.hlua_cli.task = task_new(tid_bit);
if (!appctx->ctx.hlua_cli.task) {
SEND_ERR(NULL, "Lua cli '%s': out of memory.\n", fcn->name);
goto error;
}
appctx->ctx.hlua_cli.task->nice = 0;
appctx->ctx.hlua_cli.task->context = appctx;
appctx->ctx.hlua_cli.task->process = hlua_applet_wakeup;
/* Initialises the Lua context */
if (!hlua_ctx_init(hlua, appctx->ctx.hlua_cli.task)) {
SEND_ERR(NULL, "Lua cli '%s': can't initialize Lua context.\n", fcn->name);
goto error;
}
/* The following Lua calls can fail. */
if (!SET_SAFE_LJMP(hlua->T)) {
if (lua_type(hlua->T, -1) == LUA_TSTRING)
error = lua_tostring(hlua->T, -1);
else
error = "critical error";
SEND_ERR(NULL, "Lua cli '%s': %s.\n", fcn->name, error);
goto error;
}
/* Check stack available size. */
if (!lua_checkstack(hlua->T, 2)) {
SEND_ERR(NULL, "Lua cli '%s': full stack.\n", fcn->name);
goto error;
}
/* Restore the function in the stack. */
lua_rawgeti(hlua->T, LUA_REGISTRYINDEX, fcn->function_ref);
/* Once the arguments parsed, the CLI is like an AppletTCP,
* so push AppletTCP in the stack.
*/
if (!hlua_applet_tcp_new(hlua->T, appctx)) {
SEND_ERR(NULL, "Lua cli '%s': full stack.\n", fcn->name);
goto error;
}
hlua->nargs = 1;
/* push keywords in the stack. */
for (i = 0; *args[i]; i++) {
/* Check stack available size. */
if (!lua_checkstack(hlua->T, 1)) {
SEND_ERR(NULL, "Lua cli '%s': full stack.\n", fcn->name);
goto error;
}
lua_pushstring(hlua->T, args[i]);
hlua->nargs++;
}
/* We must initialize the execution timeouts. */
hlua->max_time = hlua_timeout_session;
/* At this point the execution is safe. */
RESET_SAFE_LJMP(hlua->T);
/* It's ok */
return 0;
/* It's not ok. */
error:
RESET_SAFE_LJMP(hlua->T);
hlua_ctx_destroy(hlua);
appctx->ctx.hlua_cli.hlua = NULL;
return 1;
}
static int hlua_cli_io_handler_fct(struct appctx *appctx)
{
struct hlua *hlua;
struct stream_interface *si;
struct hlua_function *fcn;
hlua = appctx->ctx.hlua_cli.hlua;
si = appctx->owner;
fcn = appctx->ctx.hlua_cli.fcn;
/* If the stream is disconnect or closed, ldo nothing. */
if (unlikely(si->state == SI_ST_DIS || si->state == SI_ST_CLO))
return 1;
/* Execute the function. */
switch (hlua_ctx_resume(hlua, 1)) {
/* finished. */
case HLUA_E_OK:
return 1;
/* yield. */
case HLUA_E_AGAIN:
/* We want write. */
if (HLUA_IS_WAKERESWR(hlua))
si_applet_cant_put(si);
/* Set the timeout. */
if (hlua->wake_time != TICK_ETERNITY)
task_schedule(hlua->task, hlua->wake_time);
return 0;
/* finished with error. */
case HLUA_E_ERRMSG:
/* Display log. */
SEND_ERR(NULL, "Lua cli '%s': %s.\n",
fcn->name, lua_tostring(hlua->T, -1));
lua_pop(hlua->T, 1);
return 1;
case HLUA_E_ETMOUT:
SEND_ERR(NULL, "Lua converter '%s': execution timeout.\n",
fcn->name);
return 1;
case HLUA_E_NOMEM:
SEND_ERR(NULL, "Lua converter '%s': out of memory error.\n",
fcn->name);
return 1;
case HLUA_E_YIELD: /* unexpected */
SEND_ERR(NULL, "Lua converter '%s': yield not allowed.\n",
fcn->name);
return 1;
case HLUA_E_ERR:
/* Display log. */
SEND_ERR(NULL, "Lua cli '%s' return an unknown error.\n",
fcn->name);
return 1;
default:
return 1;
}
return 1;
}
static void hlua_cli_io_release_fct(struct appctx *appctx)
{
hlua_ctx_destroy(appctx->ctx.hlua_cli.hlua);
appctx->ctx.hlua_cli.hlua = NULL;
}
/* This function is an LUA binding used for registering
* new keywords in the cli. It expects a list of keywords
* which are the "path". It is limited to 5 keywords. A
* description of the command, a function to be executed
* for the parsing and a function for io handlers.
*/
__LJMP static int hlua_register_cli(lua_State *L)
{
struct cli_kw_list *cli_kws;
const char *message;
int ref_io;
int len;
struct hlua_function *fcn;
int index;
int i;
MAY_LJMP(check_args(L, 3, "register_cli"));
/* First argument : an array of maximum 5 keywords. */
if (!lua_istable(L, 1))
WILL_LJMP(luaL_argerror(L, 1, "1st argument must be a table"));
/* Second argument : string with contextual message. */
message = MAY_LJMP(luaL_checkstring(L, 2));
/* Third and fourth argument : lua function. */
ref_io = MAY_LJMP(hlua_checkfunction(L, 3));
/* Allocate and fill the sample fetch keyword struct. */
cli_kws = calloc(1, sizeof(*cli_kws) + sizeof(struct cli_kw) * 2);
if (!cli_kws)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
fcn = calloc(1, sizeof(*fcn));
if (!fcn)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
/* Fill path. */
index = 0;
lua_pushnil(L);
while(lua_next(L, 1) != 0) {
if (index >= 5)
WILL_LJMP(luaL_argerror(L, 1, "1st argument must be a table with a maximum of 5 entries"));
if (lua_type(L, -1) != LUA_TSTRING)
WILL_LJMP(luaL_argerror(L, 1, "1st argument must be a table filled with strings"));
cli_kws->kw[0].str_kw[index] = strdup(lua_tostring(L, -1));
if (!cli_kws->kw[0].str_kw[index])
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
index++;
lua_pop(L, 1);
}
/* Copy help message. */
cli_kws->kw[0].usage = strdup(message);
if (!cli_kws->kw[0].usage)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
/* Fill fcn io handler. */
len = strlen("<lua.cli>") + 1;
for (i = 0; i < index; i++)
len += strlen(cli_kws->kw[0].str_kw[i]) + 1;
fcn->name = calloc(1, len);
if (!fcn->name)
WILL_LJMP(luaL_error(L, "Lua out of memory error."));
strncat((char *)fcn->name, "<lua.cli", len);
for (i = 0; i < index; i++) {
strncat((char *)fcn->name, ".", len);
strncat((char *)fcn->name, cli_kws->kw[0].str_kw[i], len);
}
strncat((char *)fcn->name, ">", len);
fcn->function_ref = ref_io;
/* Fill last entries. */
cli_kws->kw[0].private = fcn;
cli_kws->kw[0].parse = hlua_cli_parse_fct;
cli_kws->kw[0].io_handler = hlua_cli_io_handler_fct;
cli_kws->kw[0].io_release = hlua_cli_io_release_fct;
/* Register this new converter */
cli_register_kw(cli_kws);
return 0;
}
static int hlua_read_timeout(char **args, int section_type, struct proxy *curpx,
struct proxy *defpx, const char *file, int line,
char **err, unsigned int *timeout)
{
const char *error;
error = parse_time_err(args[1], timeout, TIME_UNIT_MS);
if (error && *error != '\0') {
memprintf(err, "%s: invalid timeout", args[0]);
return -1;
}
return 0;
}
static int hlua_session_timeout(char **args, int section_type, struct proxy *curpx,
struct proxy *defpx, const char *file, int line,
char **err)
{
return hlua_read_timeout(args, section_type, curpx, defpx,
file, line, err, &hlua_timeout_session);
}
static int hlua_task_timeout(char **args, int section_type, struct proxy *curpx,
struct proxy *defpx, const char *file, int line,
char **err)
{
return hlua_read_timeout(args, section_type, curpx, defpx,
file, line, err, &hlua_timeout_task);
}
static int hlua_applet_timeout(char **args, int section_type, struct proxy *curpx,
struct proxy *defpx, const char *file, int line,
char **err)
{
return hlua_read_timeout(args, section_type, curpx, defpx,
file, line, err, &hlua_timeout_applet);
}
static int hlua_forced_yield(char **args, int section_type, struct proxy *curpx,
struct proxy *defpx, const char *file, int line,
char **err)
{
char *error;
hlua_nb_instruction = strtoll(args[1], &error, 10);
if (*error != '\0') {
memprintf(err, "%s: invalid number", args[0]);
return -1;
}
return 0;
}
static int hlua_parse_maxmem(char **args, int section_type, struct proxy *curpx,
struct proxy *defpx, const char *file, int line,
char **err)
{
char *error;
if (*(args[1]) == 0) {
memprintf(err, "'%s' expects an integer argument (Lua memory size in MB).\n", args[0]);
return -1;
}
hlua_global_allocator.limit = strtoll(args[1], &error, 10) * 1024L * 1024L;
if (*error != '\0') {
memprintf(err, "%s: invalid number %s (error at '%c')", args[0], args[1], *error);
return -1;
}
return 0;
}
/* This function is called by the main configuration key "lua-load". It loads and
* execute an lua file during the parsing of the HAProxy configuration file. It is
* the main lua entry point.
*
* This funtion runs with the HAProxy keywords API. It returns -1 if an error is
* occured, otherwise it returns 0.
*
* In some error case, LUA set an error message in top of the stack. This function
* returns this error message in the HAProxy logs and pop it from the stack.
*
* This function can fail with an abort() due to an Lua critical error.
* We are in the configuration parsing process of HAProxy, this abort() is
* tolerated.
*/
static int hlua_load(char **args, int section_type, struct proxy *curpx,
struct proxy *defpx, const char *file, int line,
char **err)
{
int error;
/* Just load and compile the file. */
error = luaL_loadfile(gL.T, args[1]);
if (error) {
memprintf(err, "error in Lua file '%s': %s", args[1], lua_tostring(gL.T, -1));
lua_pop(gL.T, 1);
return -1;
}
/* If no syntax error where detected, execute the code. */
error = lua_pcall(gL.T, 0, LUA_MULTRET, 0);
switch (error) {
case LUA_OK:
break;
case LUA_ERRRUN:
memprintf(err, "Lua runtime error: %s\n", lua_tostring(gL.T, -1));
lua_pop(gL.T, 1);
return -1;
case LUA_ERRMEM:
memprintf(err, "Lua out of memory error.n");
return -1;
case LUA_ERRERR:
memprintf(err, "Lua message handler error: %s\n", lua_tostring(gL.T, -1));
lua_pop(gL.T, 1);
return -1;
case LUA_ERRGCMM:
memprintf(err, "Lua garbage collector error: %s\n", lua_tostring(gL.T, -1));
lua_pop(gL.T, 1);
return -1;
default:
memprintf(err, "Lua unknonwn error: %s\n", lua_tostring(gL.T, -1));
lua_pop(gL.T, 1);
return -1;
}
return 0;
}
/* configuration keywords declaration */
static struct cfg_kw_list cfg_kws = {{ },{
{ CFG_GLOBAL, "lua-load", hlua_load },
{ CFG_GLOBAL, "tune.lua.session-timeout", hlua_session_timeout },
{ CFG_GLOBAL, "tune.lua.task-timeout", hlua_task_timeout },
{ CFG_GLOBAL, "tune.lua.service-timeout", hlua_applet_timeout },
{ CFG_GLOBAL, "tune.lua.forced-yield", hlua_forced_yield },
{ CFG_GLOBAL, "tune.lua.maxmem", hlua_parse_maxmem },
{ 0, NULL, NULL },
}};
/* This function can fail with an abort() due to an Lua critical error.
* We are in the initialisation process of HAProxy, this abort() is
* tolerated.
*/
int hlua_post_init()
{
struct hlua_init_function *init;
const char *msg;
enum hlua_exec ret;
const char *error;
/* Call post initialisation function in safe environement. */
if (!SET_SAFE_LJMP(gL.T)) {
if (lua_type(gL.T, -1) == LUA_TSTRING)
error = lua_tostring(gL.T, -1);
else
error = "critical error";
fprintf(stderr, "Lua post-init: %s.\n", error);
exit(1);
}
#if USE_OPENSSL
/* Initialize SSL server. */
if (socket_ssl.xprt->prepare_srv) {
int saved_used_backed = global.ssl_used_backend;
// don't affect maxconn automatic computation
socket_ssl.xprt->prepare_srv(&socket_ssl);
global.ssl_used_backend = saved_used_backed;
}
#endif
hlua_fcn_post_init(gL.T);
RESET_SAFE_LJMP(gL.T);
list_for_each_entry(init, &hlua_init_functions, l) {
lua_rawgeti(gL.T, LUA_REGISTRYINDEX, init->function_ref);
ret = hlua_ctx_resume(&gL, 0);
switch (ret) {
case HLUA_E_OK:
lua_pop(gL.T, -1);
return 1;
case HLUA_E_AGAIN:
ha_alert("Lua init: yield not allowed.\n");
return 0;
case HLUA_E_ERRMSG:
msg = lua_tostring(gL.T, -1);
ha_alert("lua init: %s.\n", msg);
return 0;
case HLUA_E_ERR:
default:
ha_alert("Lua init: unknown runtime error.\n");
return 0;
}
}
return 1;
}
/* The memory allocator used by the Lua stack. <ud> is a pointer to the
* allocator's context. <ptr> is the pointer to alloc/free/realloc. <osize>
* is the previously allocated size or the kind of object in case of a new
* allocation. <nsize> is the requested new size.
*/
static void *hlua_alloc(void *ud, void *ptr, size_t osize, size_t nsize)
{
struct hlua_mem_allocator *zone = ud;
if (nsize == 0) {
/* it's a free */
if (ptr)
zone->allocated -= osize;
free(ptr);
return NULL;
}
if (!ptr) {
/* it's a new allocation */
if (zone->limit && zone->allocated + nsize > zone->limit)
return NULL;
ptr = malloc(nsize);
if (ptr)
zone->allocated += nsize;
return ptr;
}
/* it's a realloc */
if (zone->limit && zone->allocated + nsize - osize > zone->limit)
return NULL;
ptr = realloc(ptr, nsize);
if (ptr)
zone->allocated += nsize - osize;
return ptr;
}
/* Ithis function can fail with an abort() due to an Lua critical error.
* We are in the initialisation process of HAProxy, this abort() is
* tolerated.
*/
void hlua_init(void)
{
int i;
int idx;
struct sample_fetch *sf;
struct sample_conv *sc;
char *p;
const char *error_msg;
#ifdef USE_OPENSSL
struct srv_kw *kw;
int tmp_error;
char *error;
char *args[] = { /* SSL client configuration. */
"ssl",
"verify",
"none",
NULL
};
#endif
HA_SPIN_INIT(&hlua_global_lock);
/* Initialise struct hlua and com signals pool */
pool_head_hlua = create_pool("hlua", sizeof(struct hlua), MEM_F_SHARED);
/* Register configuration keywords. */
cfg_register_keywords(&cfg_kws);
/* Init main lua stack. */
gL.Mref = LUA_REFNIL;
gL.flags = 0;
LIST_INIT(&gL.com);
gL.T = lua_newstate(hlua_alloc, &hlua_global_allocator);
hlua_sethlua(&gL);
gL.Tref = LUA_REFNIL;
gL.task = NULL;
/* From this point, until the end of the initialisation fucntion,
* the Lua function can fail with an abort. We are in the initialisation
* process of HAProxy, this abort() is tolerated.
*/
/* Initialise lua. */
luaL_openlibs(gL.T);
/* Set safe environment for the initialisation. */
if (!SET_SAFE_LJMP(gL.T)) {
if (lua_type(gL.T, -1) == LUA_TSTRING)
error_msg = lua_tostring(gL.T, -1);
else
error_msg = "critical error";
fprintf(stderr, "Lua init: %s.\n", error_msg);
exit(1);
}
/*
*
* Create "core" object.
*
*/
/* This table entry is the object "core" base. */
lua_newtable(gL.T);
/* Push the loglevel constants. */
for (i = 0; i < NB_LOG_LEVELS; i++)
hlua_class_const_int(gL.T, log_levels[i], i);
/* Register special functions. */
hlua_class_function(gL.T, "register_init", hlua_register_init);
hlua_class_function(gL.T, "register_task", hlua_register_task);
hlua_class_function(gL.T, "register_fetches", hlua_register_fetches);
hlua_class_function(gL.T, "register_converters", hlua_register_converters);
hlua_class_function(gL.T, "register_action", hlua_register_action);
hlua_class_function(gL.T, "register_service", hlua_register_service);
hlua_class_function(gL.T, "register_cli", hlua_register_cli);
hlua_class_function(gL.T, "yield", hlua_yield);
hlua_class_function(gL.T, "set_nice", hlua_set_nice);
hlua_class_function(gL.T, "sleep", hlua_sleep);
hlua_class_function(gL.T, "msleep", hlua_msleep);
hlua_class_function(gL.T, "add_acl", hlua_add_acl);
hlua_class_function(gL.T, "del_acl", hlua_del_acl);
hlua_class_function(gL.T, "set_map", hlua_set_map);
hlua_class_function(gL.T, "del_map", hlua_del_map);
hlua_class_function(gL.T, "tcp", hlua_socket_new);
hlua_class_function(gL.T, "log", hlua_log);
hlua_class_function(gL.T, "Debug", hlua_log_debug);
hlua_class_function(gL.T, "Info", hlua_log_info);
hlua_class_function(gL.T, "Warning", hlua_log_warning);
hlua_class_function(gL.T, "Alert", hlua_log_alert);
hlua_class_function(gL.T, "done", hlua_done);
hlua_fcn_reg_core_fcn(gL.T);
lua_setglobal(gL.T, "core");
/*
*
* Register class Map
*
*/
/* This table entry is the object "Map" base. */
lua_newtable(gL.T);
/* register pattern types. */
for (i=0; i<PAT_MATCH_NUM; i++)
hlua_class_const_int(gL.T, pat_match_names[i], i);
for (i=0; i<PAT_MATCH_NUM; i++) {
snprintf(trash.area, trash.size, "_%s", pat_match_names[i]);
hlua_class_const_int(gL.T, trash.area, i);
}
/* register constructor. */
hlua_class_function(gL.T, "new", hlua_map_new);
/* Create and fill the metatable. */
lua_newtable(gL.T);
/* Create and fille the __index entry. */
lua_pushstring(gL.T, "__index");
lua_newtable(gL.T);
/* Register . */
hlua_class_function(gL.T, "lookup", hlua_map_lookup);
hlua_class_function(gL.T, "slookup", hlua_map_slookup);
lua_rawset(gL.T, -3);
/* Register previous table in the registry with reference and named entry.
* The function hlua_register_metatable() pops the stack, so we
* previously create a copy of the table.
*/
lua_pushvalue(gL.T, -1); /* Copy the -1 entry and push it on the stack. */
class_map_ref = hlua_register_metatable(gL.T, CLASS_MAP);
/* Assign the metatable to the mai Map object. */
lua_setmetatable(gL.T, -2);
/* Set a name to the table. */
lua_setglobal(gL.T, "Map");
/*
*
* Register class Channel
*
*/
/* Create and fill the metatable. */
lua_newtable(gL.T);
/* Create and fille the __index entry. */
lua_pushstring(gL.T, "__index");
lua_newtable(gL.T);
/* Register . */
hlua_class_function(gL.T, "get", hlua_channel_get);
hlua_class_function(gL.T, "dup", hlua_channel_dup);
hlua_class_function(gL.T, "getline", hlua_channel_getline);
hlua_class_function(gL.T, "set", hlua_channel_set);
hlua_class_function(gL.T, "append", hlua_channel_append);
hlua_class_function(gL.T, "send", hlua_channel_send);
hlua_class_function(gL.T, "forward", hlua_channel_forward);
hlua_class_function(gL.T, "get_in_len", hlua_channel_get_in_len);
hlua_class_function(gL.T, "get_out_len", hlua_channel_get_out_len);
hlua_class_function(gL.T, "is_full", hlua_channel_is_full);
lua_rawset(gL.T, -3);
/* Register previous table in the registry with reference and named entry. */
class_channel_ref = hlua_register_metatable(gL.T, CLASS_CHANNEL);
/*
*
* Register class Fetches
*
*/
/* Create and fill the metatable. */
lua_newtable(gL.T);
/* Create and fille the __index entry. */
lua_pushstring(gL.T, "__index");
lua_newtable(gL.T);
/* Browse existing fetches and create the associated
* object method.
*/
sf = NULL;
while ((sf = sample_fetch_getnext(sf, &idx)) != NULL) {
/* Dont register the keywork if the arguments check function are
* not safe during the runtime.
*/
if ((sf->val_args != NULL) &&
(sf->val_args != val_payload_lv) &&
(sf->val_args != val_hdr))
continue;
/* gL.Tua doesn't support '.' and '-' in the function names, replace it
* by an underscore.
*/
strncpy(trash.area, sf->kw, trash.size);
trash.area[trash.size - 1] = '\0';
for (p = trash.area; *p; p++)
if (*p == '.' || *p == '-' || *p == '+')
*p = '_';
/* Register the function. */
lua_pushstring(gL.T, trash.area);
lua_pushlightuserdata(gL.T, sf);
lua_pushcclosure(gL.T, hlua_run_sample_fetch, 1);
lua_rawset(gL.T, -3);
}
lua_rawset(gL.T, -3);
/* Register previous table in the registry with reference and named entry. */
class_fetches_ref = hlua_register_metatable(gL.T, CLASS_FETCHES);
/*
*
* Register class Converters
*
*/
/* Create and fill the metatable. */
lua_newtable(gL.T);
/* Create and fill the __index entry. */
lua_pushstring(gL.T, "__index");
lua_newtable(gL.T);
/* Browse existing converters and create the associated
* object method.
*/
sc = NULL;
while ((sc = sample_conv_getnext(sc, &idx)) != NULL) {
/* Dont register the keywork if the arguments check function are
* not safe during the runtime.
*/
if (sc->val_args != NULL)
continue;
/* gL.Tua doesn't support '.' and '-' in the function names, replace it
* by an underscore.
*/
strncpy(trash.area, sc->kw, trash.size);
trash.area[trash.size - 1] = '\0';
for (p = trash.area; *p; p++)
if (*p == '.' || *p == '-' || *p == '+')
*p = '_';
/* Register the function. */
lua_pushstring(gL.T, trash.area);
lua_pushlightuserdata(gL.T, sc);
lua_pushcclosure(gL.T, hlua_run_sample_conv, 1);
lua_rawset(gL.T, -3);
}
lua_rawset(gL.T, -3);
/* Register previous table in the registry with reference and named entry. */
class_converters_ref = hlua_register_metatable(gL.T, CLASS_CONVERTERS);
/*
*
* Register class HTTP
*
*/
/* Create and fill the metatable. */
lua_newtable(gL.T);
/* Create and fille the __index entry. */
lua_pushstring(gL.T, "__index");
lua_newtable(gL.T);
/* Register Lua functions. */
hlua_class_function(gL.T, "req_get_headers",hlua_http_req_get_headers);
hlua_class_function(gL.T, "req_del_header", hlua_http_req_del_hdr);
hlua_class_function(gL.T, "req_rep_header", hlua_http_req_rep_hdr);
hlua_class_function(gL.T, "req_rep_value", hlua_http_req_rep_val);
hlua_class_function(gL.T, "req_add_header", hlua_http_req_add_hdr);
hlua_class_function(gL.T, "req_set_header", hlua_http_req_set_hdr);
hlua_class_function(gL.T, "req_set_method", hlua_http_req_set_meth);
hlua_class_function(gL.T, "req_set_path", hlua_http_req_set_path);
hlua_class_function(gL.T, "req_set_query", hlua_http_req_set_query);
hlua_class_function(gL.T, "req_set_uri", hlua_http_req_set_uri);
hlua_class_function(gL.T, "res_get_headers",hlua_http_res_get_headers);
hlua_class_function(gL.T, "res_del_header", hlua_http_res_del_hdr);
hlua_class_function(gL.T, "res_rep_header", hlua_http_res_rep_hdr);
hlua_class_function(gL.T, "res_rep_value", hlua_http_res_rep_val);
hlua_class_function(gL.T, "res_add_header", hlua_http_res_add_hdr);
hlua_class_function(gL.T, "res_set_header", hlua_http_res_set_hdr);
hlua_class_function(gL.T, "res_set_status", hlua_http_res_set_status);
lua_rawset(gL.T, -3);
/* Register previous table in the registry with reference and named entry. */
class_http_ref = hlua_register_metatable(gL.T, CLASS_HTTP);
/*
*
* Register class AppletTCP
*
*/
/* Create and fill the metatable. */
lua_newtable(gL.T);
/* Create and fille the __index entry. */
lua_pushstring(gL.T, "__index");
lua_newtable(gL.T);
/* Register Lua functions. */
hlua_class_function(gL.T, "getline", hlua_applet_tcp_getline);
hlua_class_function(gL.T, "receive", hlua_applet_tcp_recv);
hlua_class_function(gL.T, "send", hlua_applet_tcp_send);
hlua_class_function(gL.T, "set_priv", hlua_applet_tcp_set_priv);
hlua_class_function(gL.T, "get_priv", hlua_applet_tcp_get_priv);
hlua_class_function(gL.T, "set_var", hlua_applet_tcp_set_var);
hlua_class_function(gL.T, "unset_var", hlua_applet_tcp_unset_var);
hlua_class_function(gL.T, "get_var", hlua_applet_tcp_get_var);
lua_settable(gL.T, -3);
/* Register previous table in the registry with reference and named entry. */
class_applet_tcp_ref = hlua_register_metatable(gL.T, CLASS_APPLET_TCP);
/*
*
* Register class AppletHTTP
*
*/
/* Create and fill the metatable. */
lua_newtable(gL.T);
/* Create and fille the __index entry. */
lua_pushstring(gL.T, "__index");
lua_newtable(gL.T);
/* Register Lua functions. */
hlua_class_function(gL.T, "set_priv", hlua_applet_http_set_priv);
hlua_class_function(gL.T, "get_priv", hlua_applet_http_get_priv);
hlua_class_function(gL.T, "set_var", hlua_applet_http_set_var);
hlua_class_function(gL.T, "unset_var", hlua_applet_http_unset_var);
hlua_class_function(gL.T, "get_var", hlua_applet_http_get_var);
hlua_class_function(gL.T, "getline", hlua_applet_http_getline);
hlua_class_function(gL.T, "receive", hlua_applet_http_recv);
hlua_class_function(gL.T, "send", hlua_applet_http_send);
hlua_class_function(gL.T, "add_header", hlua_applet_http_addheader);
hlua_class_function(gL.T, "set_status", hlua_applet_http_status);
hlua_class_function(gL.T, "start_response", hlua_applet_http_start_response);
lua_settable(gL.T, -3);
/* Register previous table in the registry with reference and named entry. */
class_applet_http_ref = hlua_register_metatable(gL.T, CLASS_APPLET_HTTP);
/*
*
* Register class TXN
*
*/
/* Create and fill the metatable. */
lua_newtable(gL.T);
/* Create and fille the __index entry. */
lua_pushstring(gL.T, "__index");
lua_newtable(gL.T);
/* Register Lua functions. */
hlua_class_function(gL.T, "set_priv", hlua_set_priv);
hlua_class_function(gL.T, "get_priv", hlua_get_priv);
hlua_class_function(gL.T, "set_var", hlua_set_var);
hlua_class_function(gL.T, "unset_var", hlua_unset_var);
hlua_class_function(gL.T, "get_var", hlua_get_var);
hlua_class_function(gL.T, "done", hlua_txn_done);
hlua_class_function(gL.T, "set_loglevel", hlua_txn_set_loglevel);
hlua_class_function(gL.T, "set_tos", hlua_txn_set_tos);
hlua_class_function(gL.T, "set_mark", hlua_txn_set_mark);
hlua_class_function(gL.T, "set_priority_class", hlua_txn_set_priority_class);
hlua_class_function(gL.T, "set_priority_offset", hlua_txn_set_priority_offset);
hlua_class_function(gL.T, "deflog", hlua_txn_deflog);
hlua_class_function(gL.T, "log", hlua_txn_log);
hlua_class_function(gL.T, "Debug", hlua_txn_log_debug);
hlua_class_function(gL.T, "Info", hlua_txn_log_info);
hlua_class_function(gL.T, "Warning", hlua_txn_log_warning);
hlua_class_function(gL.T, "Alert", hlua_txn_log_alert);
lua_rawset(gL.T, -3);
/* Register previous table in the registry with reference and named entry. */
class_txn_ref = hlua_register_metatable(gL.T, CLASS_TXN);
/*
*
* Register class Socket
*
*/
/* Create and fill the metatable. */
lua_newtable(gL.T);
/* Create and fille the __index entry. */
lua_pushstring(gL.T, "__index");
lua_newtable(gL.T);
#ifdef USE_OPENSSL
hlua_class_function(gL.T, "connect_ssl", hlua_socket_connect_ssl);
#endif
hlua_class_function(gL.T, "connect", hlua_socket_connect);
hlua_class_function(gL.T, "send", hlua_socket_send);
hlua_class_function(gL.T, "receive", hlua_socket_receive);
hlua_class_function(gL.T, "close", hlua_socket_close);
hlua_class_function(gL.T, "getpeername", hlua_socket_getpeername);
hlua_class_function(gL.T, "getsockname", hlua_socket_getsockname);
hlua_class_function(gL.T, "setoption", hlua_socket_setoption);
hlua_class_function(gL.T, "settimeout", hlua_socket_settimeout);
lua_rawset(gL.T, -3); /* Push the last 2 entries in the table at index -3 */
/* Register the garbage collector entry. */
lua_pushstring(gL.T, "__gc");
lua_pushcclosure(gL.T, hlua_socket_gc, 0);
lua_rawset(gL.T, -3); /* Push the last 2 entries in the table at index -3 */
/* Register previous table in the registry with reference and named entry. */
class_socket_ref = hlua_register_metatable(gL.T, CLASS_SOCKET);
/* Proxy and server configuration initialisation. */
memset(&socket_proxy, 0, sizeof(socket_proxy));
init_new_proxy(&socket_proxy);
socket_proxy.parent = NULL;
socket_proxy.last_change = now.tv_sec;
socket_proxy.id = "LUA-SOCKET";
socket_proxy.cap = PR_CAP_FE | PR_CAP_BE;
socket_proxy.maxconn = 0;
socket_proxy.accept = NULL;
socket_proxy.options2 |= PR_O2_INDEPSTR;
socket_proxy.srv = NULL;
socket_proxy.conn_retries = 0;
socket_proxy.timeout.connect = 5000; /* By default the timeout connection is 5s. */
/* Init TCP server: unchanged parameters */
memset(&socket_tcp, 0, sizeof(socket_tcp));
socket_tcp.next = NULL;
socket_tcp.proxy = &socket_proxy;
socket_tcp.obj_type = OBJ_TYPE_SERVER;
LIST_INIT(&socket_tcp.actconns);
socket_tcp.pendconns = EB_ROOT;
socket_tcp.priv_conns = NULL;
socket_tcp.idle_conns = NULL;
socket_tcp.safe_conns = NULL;
socket_tcp.next_state = SRV_ST_RUNNING; /* early server setup */
socket_tcp.last_change = 0;
socket_tcp.id = "LUA-TCP-CONN";
socket_tcp.check.state &= ~CHK_ST_ENABLED; /* Disable health checks. */
socket_tcp.agent.state &= ~CHK_ST_ENABLED; /* Disable health checks. */
socket_tcp.pp_opts = 0; /* Remove proxy protocol. */
/* XXX: Copy default parameter from default server,
* but the default server is not initialized.
*/
socket_tcp.maxqueue = socket_proxy.defsrv.maxqueue;
socket_tcp.minconn = socket_proxy.defsrv.minconn;
socket_tcp.maxconn = socket_proxy.defsrv.maxconn;
socket_tcp.slowstart = socket_proxy.defsrv.slowstart;
socket_tcp.onerror = socket_proxy.defsrv.onerror;
socket_tcp.onmarkeddown = socket_proxy.defsrv.onmarkeddown;
socket_tcp.onmarkedup = socket_proxy.defsrv.onmarkedup;
socket_tcp.consecutive_errors_limit = socket_proxy.defsrv.consecutive_errors_limit;
socket_tcp.uweight = socket_proxy.defsrv.iweight;
socket_tcp.iweight = socket_proxy.defsrv.iweight;
socket_tcp.check.status = HCHK_STATUS_INI;
socket_tcp.check.rise = socket_proxy.defsrv.check.rise;
socket_tcp.check.fall = socket_proxy.defsrv.check.fall;
socket_tcp.check.health = socket_tcp.check.rise; /* socket, but will fall down at first failure */
socket_tcp.check.server = &socket_tcp;
socket_tcp.agent.status = HCHK_STATUS_INI;
socket_tcp.agent.rise = socket_proxy.defsrv.agent.rise;
socket_tcp.agent.fall = socket_proxy.defsrv.agent.fall;
socket_tcp.agent.health = socket_tcp.agent.rise; /* socket, but will fall down at first failure */
socket_tcp.agent.server = &socket_tcp;
socket_tcp.xprt = xprt_get(XPRT_RAW);
#ifdef USE_OPENSSL
/* Init TCP server: unchanged parameters */
memset(&socket_ssl, 0, sizeof(socket_ssl));
socket_ssl.next = NULL;
socket_ssl.proxy = &socket_proxy;
socket_ssl.obj_type = OBJ_TYPE_SERVER;
LIST_INIT(&socket_ssl.actconns);
socket_ssl.pendconns = EB_ROOT;
socket_tcp.priv_conns = NULL;
socket_tcp.idle_conns = NULL;
socket_tcp.safe_conns = NULL;
socket_ssl.next_state = SRV_ST_RUNNING; /* early server setup */
socket_ssl.last_change = 0;
socket_ssl.id = "LUA-SSL-CONN";
socket_ssl.check.state &= ~CHK_ST_ENABLED; /* Disable health checks. */
socket_ssl.agent.state &= ~CHK_ST_ENABLED; /* Disable health checks. */
socket_ssl.pp_opts = 0; /* Remove proxy protocol. */
/* XXX: Copy default parameter from default server,
* but the default server is not initialized.
*/
socket_ssl.maxqueue = socket_proxy.defsrv.maxqueue;
socket_ssl.minconn = socket_proxy.defsrv.minconn;
socket_ssl.maxconn = socket_proxy.defsrv.maxconn;
socket_ssl.slowstart = socket_proxy.defsrv.slowstart;
socket_ssl.onerror = socket_proxy.defsrv.onerror;
socket_ssl.onmarkeddown = socket_proxy.defsrv.onmarkeddown;
socket_ssl.onmarkedup = socket_proxy.defsrv.onmarkedup;
socket_ssl.consecutive_errors_limit = socket_proxy.defsrv.consecutive_errors_limit;
socket_ssl.uweight = socket_proxy.defsrv.iweight;
socket_ssl.iweight = socket_proxy.defsrv.iweight;
socket_ssl.check.status = HCHK_STATUS_INI;
socket_ssl.check.rise = socket_proxy.defsrv.check.rise;
socket_ssl.check.fall = socket_proxy.defsrv.check.fall;
socket_ssl.check.health = socket_ssl.check.rise; /* socket, but will fall down at first failure */
socket_ssl.check.server = &socket_ssl;
socket_ssl.agent.status = HCHK_STATUS_INI;
socket_ssl.agent.rise = socket_proxy.defsrv.agent.rise;
socket_ssl.agent.fall = socket_proxy.defsrv.agent.fall;
socket_ssl.agent.health = socket_ssl.agent.rise; /* socket, but will fall down at first failure */
socket_ssl.agent.server = &socket_ssl;
socket_ssl.use_ssl = 1;
socket_ssl.xprt = xprt_get(XPRT_SSL);
for (idx = 0; args[idx] != NULL; idx++) {
if ((kw = srv_find_kw(args[idx])) != NULL) { /* Maybe it's registered server keyword */
/*
*
* If the keyword is not known, we can search in the registered
* server keywords. This is usefull to configure special SSL
* features like client certificates and ssl_verify.
*
*/
tmp_error = kw->parse(args, &idx, &socket_proxy, &socket_ssl, &error);
if (tmp_error != 0) {
fprintf(stderr, "INTERNAL ERROR: %s\n", error);
abort(); /* This must be never arrives because the command line
not editable by the user. */
}
idx += kw->skip;
}
}
#endif
RESET_SAFE_LJMP(gL.T);
}
__attribute__((constructor))
static void __hlua_init(void)
{
char *ptr = NULL;
memprintf(&ptr, "Built with Lua version : %s", LUA_RELEASE);
hap_register_build_opts(ptr, 1);
}
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