RepoMirrors/haproxy
1
0
Fork 0
mirror of http://git.haproxy.org/git/haproxy.git/ synced 2025-01-31 10:31:46 +00:00
Code Issues Packages Projects Releases Wiki Activity

MINOR: lua: Add a function to get a filter attached to a channel class

Browse Source 
For now, there is no support for filters written in lua. So this function,
if called, will always return NULL. But when it will be called in a filter
context, it will return the filter structure attached to a channel
class. This function is also responsible to set the offset of data that may
be processed and the length of these data. When called outside a filter
context (so from an action), the offset is the input data position and the
length is the input data length. From a filter, the offset and the length of
data that may be filtered are retrieved the filter context.
This commit is contained in:
Christopher Faulet 2020-02-25 15:21:02 +01:00
parent 69c581a092
commit 9f55a5012e
1 changed files with 35 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
src/hlua.c
View File

@ -196,6 +196,8 @@ lua_State *hlua_init_state(int thread_id);
*/
static lua_State *hlua_states[MAX_THREADS + 1];
#define HLUA_FLT_CTX_FL_PAYLOAD 0x00000001
struct hlua_reg_filter {
char *name;
int flt_ref[MAX_THREADS + 1];
@ -219,6 +221,8 @@ struct hlua_flt_ctx {
DECLARE_STATIC_POOL(pool_head_hlua_flt_ctx, "hlua_flt_ctx", sizeof(struct hlua_flt_ctx));
static int hlua_filter_from_payload(struct filter *filter);
/* This is the chained list of struct hlua_flt referenced
* for haproxy filters. It is used for a post-initialisation control.
*/
@ -3000,6 +3004,30 @@ static int hlua_channel_new(lua_State *L, struct channel *channel)
return 1;
}
/* Helper function returning a filter attached to a channel at the position <ud>
* in the stack, filling the current offset and length of the filter. If no
* filter is attached, NULL is returned and <offet> and <len> are not
* initialized.
*/
static __maybe_unused struct filter *hlua_channel_filter(lua_State *L, int ud, struct channel *chn, size_t *offset, size_t *len)
{
struct filter *filter = NULL;
if (lua_getfield(L, ud, "__filter") == LUA_TLIGHTUSERDATA) {
struct hlua_flt_ctx *flt_ctx;
filter = lua_touserdata (L, -1);
flt_ctx = filter->ctx;
if (hlua_filter_from_payload(filter)) {
*offset = flt_ctx->cur_off[CHN_IDX(chn)];
*len = flt_ctx->cur_len[CHN_IDX(chn)];
}
}
lua_pop(L, 1);
return filter;
}
/* Copies <len> bytes of data present in the channel's buffer, starting at the
* offset <offset>, and put it in a LUA string variable. It is the caller
* responsibility to ensure <len> and <offset> are valid. It always return the
@ -8812,6 +8840,13 @@ static void hlua_filter_delete(struct stream *s, struct filter *filter)
filter->ctx = NULL;
}
static int hlua_filter_from_payload(struct filter *filter)
{
struct hlua_flt_ctx *flt_ctx = filter->ctx;
return (flt_ctx && !!(flt_ctx->flags & HLUA_FLT_CTX_FL_PAYLOAD));
}
static int hlua_filter_parse_fct(char **args, int *cur_arg, struct proxy *px,
struct flt_conf *fconf, char **err, void *private)
{