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haproxy/src/standard.c
Willy Tarreau 3ca1a883f9 MINOR: tools: add new round_2dig() function to round integers 
This function rounds down an integer to the closest value having only
2 significant digits.
2015-01-15 19:02:27 +01:00

2674 lines
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/*
* General purpose functions.
*
* Copyright 2000-2010 Willy Tarreau <w@1wt.eu>
*
* 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 <netdb.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <common/chunk.h>
#include <common/config.h>
#include <common/standard.h>
#include <types/global.h>
#include <eb32tree.h>
/* enough to store NB_ITOA_STR integers of :
* 2^64-1 = 18446744073709551615 or
* -2^63 = -9223372036854775808
*
* The HTML version needs room for adding the 25 characters
* '<span class="rls"></span>' around digits at positions 3N+1 in order
* to add spacing at up to 6 positions : 18 446 744 073 709 551 615
*/
char itoa_str[NB_ITOA_STR][171];
int itoa_idx = 0; /* index of next itoa_str to use */
/* sometimes we'll need to quote strings (eg: in stats), and we don't expect
* to quote strings larger than a max configuration line.
*/
char quoted_str[NB_QSTR][QSTR_SIZE + 1];
int quoted_idx = 0;
/*
* unsigned long long ASCII representation
*
* return the last char '\0' or NULL if no enough
* space in dst
*/
char *ulltoa(unsigned long long n, char *dst, size_t size)
{
int i = 0;
char *res;
switch(n) {
case 1ULL ... 9ULL:
i = 0;
break;
case 10ULL ... 99ULL:
i = 1;
break;
case 100ULL ... 999ULL:
i = 2;
break;
case 1000ULL ... 9999ULL:
i = 3;
break;
case 10000ULL ... 99999ULL:
i = 4;
break;
case 100000ULL ... 999999ULL:
i = 5;
break;
case 1000000ULL ... 9999999ULL:
i = 6;
break;
case 10000000ULL ... 99999999ULL:
i = 7;
break;
case 100000000ULL ... 999999999ULL:
i = 8;
break;
case 1000000000ULL ... 9999999999ULL:
i = 9;
break;
case 10000000000ULL ... 99999999999ULL:
i = 10;
break;
case 100000000000ULL ... 999999999999ULL:
i = 11;
break;
case 1000000000000ULL ... 9999999999999ULL:
i = 12;
break;
case 10000000000000ULL ... 99999999999999ULL:
i = 13;
break;
case 100000000000000ULL ... 999999999999999ULL:
i = 14;
break;
case 1000000000000000ULL ... 9999999999999999ULL:
i = 15;
break;
case 10000000000000000ULL ... 99999999999999999ULL:
i = 16;
break;
case 100000000000000000ULL ... 999999999999999999ULL:
i = 17;
break;
case 1000000000000000000ULL ... 9999999999999999999ULL:
i = 18;
break;
case 10000000000000000000ULL ... ULLONG_MAX:
i = 19;
break;
}
if (i + 2 > size) // (i + 1) + '\0'
return NULL; // too long
res = dst + i + 1;
*res = '\0';
for (; i >= 0; i--) {
dst[i] = n % 10ULL + '0';
n /= 10ULL;
}
return res;
}
/*
* unsigned long ASCII representation
*
* return the last char '\0' or NULL if no enough
* space in dst
*/
char *ultoa_o(unsigned long n, char *dst, size_t size)
{
int i = 0;
char *res;
switch (n) {
case 0U ... 9UL:
i = 0;
break;
case 10U ... 99UL:
i = 1;
break;
case 100U ... 999UL:
i = 2;
break;
case 1000U ... 9999UL:
i = 3;
break;
case 10000U ... 99999UL:
i = 4;
break;
case 100000U ... 999999UL:
i = 5;
break;
case 1000000U ... 9999999UL:
i = 6;
break;
case 10000000U ... 99999999UL:
i = 7;
break;
case 100000000U ... 999999999UL:
i = 8;
break;
#if __WORDSIZE == 32
case 1000000000ULL ... ULONG_MAX:
i = 9;
break;
#elif __WORDSIZE == 64
case 1000000000ULL ... 9999999999UL:
i = 9;
break;
case 10000000000ULL ... 99999999999UL:
i = 10;
break;
case 100000000000ULL ... 999999999999UL:
i = 11;
break;
case 1000000000000ULL ... 9999999999999UL:
i = 12;
break;
case 10000000000000ULL ... 99999999999999UL:
i = 13;
break;
case 100000000000000ULL ... 999999999999999UL:
i = 14;
break;
case 1000000000000000ULL ... 9999999999999999UL:
i = 15;
break;
case 10000000000000000ULL ... 99999999999999999UL:
i = 16;
break;
case 100000000000000000ULL ... 999999999999999999UL:
i = 17;
break;
case 1000000000000000000ULL ... 9999999999999999999UL:
i = 18;
break;
case 10000000000000000000ULL ... ULONG_MAX:
i = 19;
break;
#endif
}
if (i + 2 > size) // (i + 1) + '\0'
return NULL; // too long
res = dst + i + 1;
*res = '\0';
for (; i >= 0; i--) {
dst[i] = n % 10U + '0';
n /= 10U;
}
return res;
}
/*
* signed long ASCII representation
*
* return the last char '\0' or NULL if no enough
* space in dst
*/
char *ltoa_o(long int n, char *dst, size_t size)
{
char *pos = dst;
if (n < 0) {
if (size < 3)
return NULL; // min size is '-' + digit + '\0' but another test in ultoa
*pos = '-';
pos++;
dst = ultoa_o(-n, pos, size - 1);
} else {
dst = ultoa_o(n, dst, size);
}
return dst;
}
/*
* signed long long ASCII representation
*
* return the last char '\0' or NULL if no enough
* space in dst
*/
char *lltoa(long long n, char *dst, size_t size)
{
char *pos = dst;
if (n < 0) {
if (size < 3)
return NULL; // min size is '-' + digit + '\0' but another test in ulltoa
*pos = '-';
pos++;
dst = ulltoa(-n, pos, size - 1);
} else {
dst = ulltoa(n, dst, size);
}
return dst;
}
/*
* write a ascii representation of a unsigned into dst,
* return a pointer to the last character
* Pad the ascii representation with '0', using size.
*/
char *utoa_pad(unsigned int n, char *dst, size_t size)
{
int i = 0;
char *ret;
switch(n) {
case 0U ... 9U:
i = 0;
break;
case 10U ... 99U:
i = 1;
break;
case 100U ... 999U:
i = 2;
break;
case 1000U ... 9999U:
i = 3;
break;
case 10000U ... 99999U:
i = 4;
break;
case 100000U ... 999999U:
i = 5;
break;
case 1000000U ... 9999999U:
i = 6;
break;
case 10000000U ... 99999999U:
i = 7;
break;
case 100000000U ... 999999999U:
i = 8;
break;
case 1000000000U ... 4294967295U:
i = 9;
break;
}
if (i + 2 > size) // (i + 1) + '\0'
return NULL; // too long
if (i < size)
i = size - 2; // padding - '\0'
ret = dst + i + 1;
*ret = '\0';
for (; i >= 0; i--) {
dst[i] = n % 10U + '0';
n /= 10U;
}
return ret;
}
/*
* copies at most <size-1> chars from <src> to <dst>. Last char is always
* set to 0, unless <size> is 0. The number of chars copied is returned
* (excluding the terminating zero).
* This code has been optimized for size and speed : on x86, it's 45 bytes
* long, uses only registers, and consumes only 4 cycles per char.
*/
int strlcpy2(char *dst, const char *src, int size)
{
char *orig = dst;
if (size) {
while (--size && (*dst = *src)) {
src++; dst++;
}
*dst = 0;
}
return dst - orig;
}
/*
* This function simply returns a locally allocated string containing
* the ascii representation for number 'n' in decimal.
*/
char *ultoa_r(unsigned long n, char *buffer, int size)
{
char *pos;
pos = buffer + size - 1;
*pos-- = '\0';
do {
*pos-- = '0' + n % 10;
n /= 10;
} while (n && pos >= buffer);
return pos + 1;
}
/*
* This function simply returns a locally allocated string containing
* the ascii representation for number 'n' in decimal, formatted for
* HTML output with tags to create visual grouping by 3 digits. The
* output needs to support at least 171 characters.
*/
const char *ulltoh_r(unsigned long long n, char *buffer, int size)
{
char *start;
int digit = 0;
start = buffer + size;
*--start = '\0';
do {
if (digit == 3 && start >= buffer + 7)
memcpy(start -= 7, "</span>", 7);
if (start >= buffer + 1) {
*--start = '0' + n % 10;
n /= 10;
}
if (digit == 3 && start >= buffer + 18)
memcpy(start -= 18, "<span class=\"rls\">", 18);
if (digit++ == 3)
digit = 1;
} while (n && start > buffer);
return start;
}
/*
* This function simply returns a locally allocated string containing the ascii
* representation for number 'n' in decimal, unless n is 0 in which case it
* returns the alternate string (or an empty string if the alternate string is
* NULL). It use is intended for limits reported in reports, where it's
* desirable not to display anything if there is no limit. Warning! it shares
* the same vector as ultoa_r().
*/
const char *limit_r(unsigned long n, char *buffer, int size, const char *alt)
{
return (n) ? ultoa_r(n, buffer, size) : (alt ? alt : "");
}
/* returns a locally allocated string containing the quoted encoding of the
* input string. The output may be truncated to QSTR_SIZE chars, but it is
* guaranteed that the string will always be properly terminated. Quotes are
* encoded by doubling them as is commonly done in CSV files. QSTR_SIZE must
* always be at least 4 chars.
*/
const char *qstr(const char *str)
{
char *ret = quoted_str[quoted_idx];
char *p, *end;
if (++quoted_idx >= NB_QSTR)
quoted_idx = 0;
p = ret;
end = ret + QSTR_SIZE;
*p++ = '"';
/* always keep 3 chars to support passing "" and the ending " */
while (*str && p < end - 3) {
if (*str == '"') {
*p++ = '"';
*p++ = '"';
}
else
*p++ = *str;
str++;
}
*p++ = '"';
return ret;
}
/*
* Returns non-zero if character <s> is a hex digit (0-9, a-f, A-F), else zero.
*
* It looks like this one would be a good candidate for inlining, but this is
* not interesting because it around 35 bytes long and often called multiple
* times within the same function.
*/
int ishex(char s)
{
s -= '0';
if ((unsigned char)s <= 9)
return 1;
s -= 'A' - '0';
if ((unsigned char)s <= 5)
return 1;
s -= 'a' - 'A';
if ((unsigned char)s <= 5)
return 1;
return 0;
}
/* rounds <i> down to the closest value having max 2 digits */
unsigned int round_2dig(unsigned int i)
{
unsigned int mul = 1;
while (i >= 100) {
i /= 10;
mul *= 10;
}
return i * mul;
}
/*
* Checks <name> for invalid characters. Valid chars are [A-Za-z0-9_:.-]. If an
* invalid character is found, a pointer to it is returned. If everything is
* fine, NULL is returned.
*/
const char *invalid_char(const char *name)
{
if (!*name)
return name;
while (*name) {
if (!isalnum((int)(unsigned char)*name) && *name != '.' && *name != ':' &&
*name != '_' && *name != '-')
return name;
name++;
}
return NULL;
}
/*
* Checks <domainname> for invalid characters. Valid chars are [A-Za-z0-9_.-].
* If an invalid character is found, a pointer to it is returned.
* If everything is fine, NULL is returned.
*/
const char *invalid_domainchar(const char *name) {
if (!*name)
return name;
while (*name) {
if (!isalnum((int)(unsigned char)*name) && *name != '.' &&
*name != '_' && *name != '-')
return name;
name++;
}
return NULL;
}
/*
* converts <str> to a struct sockaddr_storage* provided by the caller. The
* caller must have zeroed <sa> first, and may have set sa->ss_family to force
* parse a specific address format. If the ss_family is 0 or AF_UNSPEC, then
* the function tries to guess the address family from the syntax. If the
* family is forced and the format doesn't match, an error is returned. The
* string is assumed to contain only an address, no port. The address can be a
* dotted IPv4 address, an IPv6 address, a host name, or empty or "*" to
* indicate INADDR_ANY. NULL is returned if the host part cannot be resolved.
* The return address will only have the address family and the address set,
* all other fields remain zero. The string is not supposed to be modified.
* The IPv6 '::' address is IN6ADDR_ANY.
*/
static struct sockaddr_storage *str2ip(const char *str, struct sockaddr_storage *sa)
{
struct hostent *he;
/* Any IPv6 address */
if (str[0] == ':' && str[1] == ':' && !str[2]) {
if (!sa->ss_family || sa->ss_family == AF_UNSPEC)
sa->ss_family = AF_INET6;
else if (sa->ss_family != AF_INET6)
goto fail;
return sa;
}
/* Any address for the family, defaults to IPv4 */
if (!str[0] || (str[0] == '*' && !str[1])) {
if (!sa->ss_family || sa->ss_family == AF_UNSPEC)
sa->ss_family = AF_INET;
return sa;
}
/* check for IPv6 first */
if ((!sa->ss_family || sa->ss_family == AF_UNSPEC || sa->ss_family == AF_INET6) &&
inet_pton(AF_INET6, str, &((struct sockaddr_in6 *)sa)->sin6_addr)) {
sa->ss_family = AF_INET6;
return sa;
}
/* then check for IPv4 */
if ((!sa->ss_family || sa->ss_family == AF_UNSPEC || sa->ss_family == AF_INET) &&
inet_pton(AF_INET, str, &((struct sockaddr_in *)sa)->sin_addr)) {
sa->ss_family = AF_INET;
return sa;
}
#ifdef USE_GETADDRINFO
if (global.tune.options & GTUNE_USE_GAI) {
struct addrinfo hints, *result;
memset(&result, 0, sizeof(result));
memset(&hints, 0, sizeof(hints));
hints.ai_family = sa->ss_family ? sa->ss_family : AF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_flags = AI_PASSIVE;
hints.ai_protocol = 0;
if (getaddrinfo(str, NULL, &hints, &result) == 0) {
if (!sa->ss_family || sa->ss_family == AF_UNSPEC)
sa->ss_family = result->ai_family;
else if (sa->ss_family != result->ai_family)
goto fail;
switch (result->ai_family) {
case AF_INET:
memcpy((struct sockaddr_in *)sa, result->ai_addr, result->ai_addrlen);
return sa;
case AF_INET6:
memcpy((struct sockaddr_in6 *)sa, result->ai_addr, result->ai_addrlen);
return sa;
}
}
if (result)
freeaddrinfo(result);
}
#endif
/* try to resolve an IPv4/IPv6 hostname */
he = gethostbyname(str);
if (he) {
if (!sa->ss_family || sa->ss_family == AF_UNSPEC)
sa->ss_family = he->h_addrtype;
else if (sa->ss_family != he->h_addrtype)
goto fail;
switch (sa->ss_family) {
case AF_INET:
((struct sockaddr_in *)sa)->sin_addr = *(struct in_addr *) *(he->h_addr_list);
return sa;
case AF_INET6:
((struct sockaddr_in6 *)sa)->sin6_addr = *(struct in6_addr *) *(he->h_addr_list);
return sa;
}
}
/* unsupported address family */
fail:
return NULL;
}
/*
* Converts <str> to a locally allocated struct sockaddr_storage *, and a port
* range or offset consisting in two integers that the caller will have to
* check to find the relevant input format. The following format are supported :
*
* String format | address | port | low | high
* addr | <addr> | 0 | 0 | 0
* addr: | <addr> | 0 | 0 | 0
* addr:port | <addr> | <port> | <port> | <port>
* addr:pl-ph | <addr> | <pl> | <pl> | <ph>
* addr:+port | <addr> | <port> | 0 | <port>
* addr:-port | <addr> |-<port> | <port> | 0
*
* The detection of a port range or increment by the caller is made by
* comparing <low> and <high>. If both are equal, then port 0 means no port
* was specified. The caller may pass NULL for <low> and <high> if it is not
* interested in retrieving port ranges.
*
* Note that <addr> above may also be :
* - empty ("") => family will be AF_INET and address will be INADDR_ANY
* - "*" => family will be AF_INET and address will be INADDR_ANY
* - "::" => family will be AF_INET6 and address will be IN6ADDR_ANY
* - a host name => family and address will depend on host name resolving.
*
* A prefix may be passed in before the address above to force the family :
* - "ipv4@" => force address to resolve as IPv4 and fail if not possible.
* - "ipv6@" => force address to resolve as IPv6 and fail if not possible.
* - "unix@" => force address to be a path to a UNIX socket even if the
* path does not start with a '/'
* - 'abns@' -> force address to belong to the abstract namespace (Linux
* only). These sockets are just like Unix sockets but without
* the need for an underlying file system. The address is a
* string. Technically it's like a Unix socket with a zero in
* the first byte of the address.
* - "fd@" => an integer must follow, and is a file descriptor number.
*
* Also note that in order to avoid any ambiguity with IPv6 addresses, the ':'
* is mandatory after the IP address even when no port is specified. NULL is
* returned if the address cannot be parsed. The <low> and <high> ports are
* always initialized if non-null, even for non-IP families.
*
* If <pfx> is non-null, it is used as a string prefix before any path-based
* address (typically the path to a unix socket).
*
* When a file descriptor is passed, its value is put into the s_addr part of
* the address when cast to sockaddr_in and the address family is AF_UNSPEC.
*/
struct sockaddr_storage *str2sa_range(const char *str, int *low, int *high, char **err, const char *pfx)
{
static struct sockaddr_storage ss;
struct sockaddr_storage *ret = NULL;
char *back, *str2;
char *port1, *port2;
int portl, porth, porta;
int abstract = 0;
portl = porth = porta = 0;
str2 = back = env_expand(strdup(str));
if (str2 == NULL) {
memprintf(err, "out of memory in '%s'\n", __FUNCTION__);
goto out;
}
memset(&ss, 0, sizeof(ss));
if (strncmp(str2, "unix@", 5) == 0) {
str2 += 5;
abstract = 0;
ss.ss_family = AF_UNIX;
}
else if (strncmp(str2, "abns@", 5) == 0) {
str2 += 5;
abstract = 1;
ss.ss_family = AF_UNIX;
}
else if (strncmp(str2, "ipv4@", 5) == 0) {
str2 += 5;
ss.ss_family = AF_INET;
}
else if (strncmp(str2, "ipv6@", 5) == 0) {
str2 += 5;
ss.ss_family = AF_INET6;
}
else if (*str2 == '/') {
ss.ss_family = AF_UNIX;
}
else
ss.ss_family = AF_UNSPEC;
if (ss.ss_family == AF_UNSPEC && strncmp(str2, "fd@", 3) == 0) {
char *endptr;
str2 += 3;
((struct sockaddr_in *)&ss)->sin_addr.s_addr = strtol(str2, &endptr, 10);
if (!*str2 || *endptr) {
memprintf(err, "file descriptor '%s' is not a valid integer in '%s'\n", str2, str);
goto out;
}
/* we return AF_UNSPEC if we use a file descriptor number */
ss.ss_family = AF_UNSPEC;
}
else if (ss.ss_family == AF_UNIX) {
int prefix_path_len;
int max_path_len;
int adr_len;
/* complete unix socket path name during startup or soft-restart is
* <unix_bind_prefix><path>.<pid>.<bak|tmp>
*/
prefix_path_len = (pfx && !abstract) ? strlen(pfx) : 0;
max_path_len = (sizeof(((struct sockaddr_un *)&ss)->sun_path) - 1) -
(prefix_path_len ? prefix_path_len + 1 + 5 + 1 + 3 : 0);
adr_len = strlen(str2);
if (adr_len > max_path_len) {
memprintf(err, "socket path '%s' too long (max %d)\n", str, max_path_len);
goto out;
}
/* when abstract==1, we skip the first zero and copy all bytes except the trailing zero */
memset(((struct sockaddr_un *)&ss)->sun_path, 0, sizeof(((struct sockaddr_un *)&ss)->sun_path));
if (prefix_path_len)
memcpy(((struct sockaddr_un *)&ss)->sun_path, pfx, prefix_path_len);
memcpy(((struct sockaddr_un *)&ss)->sun_path + prefix_path_len + abstract, str2, adr_len + 1 - abstract);
}
else { /* IPv4 and IPv6 */
port1 = strrchr(str2, ':');
if (port1)
*port1++ = '\0';
else
port1 = "";
if (str2ip(str2, &ss) == NULL) {
memprintf(err, "invalid address: '%s' in '%s'\n", str2, str);
goto out;
}
if (isdigit((int)(unsigned char)*port1)) { /* single port or range */
port2 = strchr(port1, '-');
if (port2)
*port2++ = '\0';
else
port2 = port1;
portl = atoi(port1);
porth = atoi(port2);
porta = portl;
}
else if (*port1 == '-') { /* negative offset */
portl = atoi(port1 + 1);
porta = -portl;
}
else if (*port1 == '+') { /* positive offset */
porth = atoi(port1 + 1);
porta = porth;
}
else if (*port1) { /* other any unexpected char */
memprintf(err, "invalid character '%c' in port number '%s' in '%s'\n", *port1, port1, str);
goto out;
}
set_host_port(&ss, porta);
}
ret = &ss;
out:
if (low)
*low = portl;
if (high)
*high = porth;
free(back);
return ret;
}
/* converts <str> to a struct in_addr containing a network mask. It can be
* passed in dotted form (255.255.255.0) or in CIDR form (24). It returns 1
* if the conversion succeeds otherwise non-zero.
*/
int str2mask(const char *str, struct in_addr *mask)
{
if (strchr(str, '.') != NULL) { /* dotted notation */
if (!inet_pton(AF_INET, str, mask))
return 0;
}
else { /* mask length */
char *err;
unsigned long len = strtol(str, &err, 10);
if (!*str || (err && *err) || (unsigned)len > 32)
return 0;
if (len)
mask->s_addr = htonl(~0UL << (32 - len));
else
mask->s_addr = 0;
}
return 1;
}
/* convert <cidr> to struct in_addr <mask>. It returns 1 if the conversion
* succeeds otherwise zero.
*/
int cidr2dotted(int cidr, struct in_addr *mask) {
if (cidr < 0 || cidr > 32)
return 0;
mask->s_addr = cidr ? htonl(~0UL << (32 - cidr)) : 0;
return 1;
}
/*
* converts <str> to two struct in_addr* which must be pre-allocated.
* The format is "addr[/mask]", where "addr" cannot be empty, and mask
* is optionnal and either in the dotted or CIDR notation.
* Note: "addr" can also be a hostname. Returns 1 if OK, 0 if error.
*/
int str2net(const char *str, int resolve, struct in_addr *addr, struct in_addr *mask)
{
__label__ out_free, out_err;
char *c, *s;
int ret_val;
s = strdup(str);
if (!s)
return 0;
memset(mask, 0, sizeof(*mask));
memset(addr, 0, sizeof(*addr));
if ((c = strrchr(s, '/')) != NULL) {
*c++ = '\0';
/* c points to the mask */
if (!str2mask(c, mask))
goto out_err;
}
else {
mask->s_addr = ~0U;
}
if (!inet_pton(AF_INET, s, addr)) {
struct hostent *he;
if (!resolve)
goto out_err;
if ((he = gethostbyname(s)) == NULL) {
goto out_err;
}
else
*addr = *(struct in_addr *) *(he->h_addr_list);
}
ret_val = 1;
out_free:
free(s);
return ret_val;
out_err:
ret_val = 0;
goto out_free;
}
/*
* converts <str> to two struct in6_addr* which must be pre-allocated.
* The format is "addr[/mask]", where "addr" cannot be empty, and mask
* is an optionnal number of bits (128 being the default).
* Returns 1 if OK, 0 if error.
*/
int str62net(const char *str, struct in6_addr *addr, unsigned char *mask)
{
char *c, *s;
int ret_val = 0;
char *err;
unsigned long len = 128;
s = strdup(str);
if (!s)
return 0;
memset(mask, 0, sizeof(*mask));
memset(addr, 0, sizeof(*addr));
if ((c = strrchr(s, '/')) != NULL) {
*c++ = '\0'; /* c points to the mask */
if (!*c)
goto out_free;
len = strtoul(c, &err, 10);
if ((err && *err) || (unsigned)len > 128)
goto out_free;
}
*mask = len; /* OK we have a valid mask in <len> */
if (!inet_pton(AF_INET6, s, addr))
goto out_free;
ret_val = 1;
out_free:
free(s);
return ret_val;
}
/*
* Parse IPv4 address found in url.
*/
int url2ipv4(const char *addr, struct in_addr *dst)
{
int saw_digit, octets, ch;
u_char tmp[4], *tp;
const char *cp = addr;
saw_digit = 0;
octets = 0;
*(tp = tmp) = 0;
while (*addr) {
unsigned char digit = (ch = *addr++) - '0';
if (digit > 9 && ch != '.')
break;
if (digit <= 9) {
u_int new = *tp * 10 + digit;
if (new > 255)
return 0;
*tp = new;
if (!saw_digit) {
if (++octets > 4)
return 0;
saw_digit = 1;
}
} else if (ch == '.' && saw_digit) {
if (octets == 4)
return 0;
*++tp = 0;
saw_digit = 0;
} else
return 0;
}
if (octets < 4)
return 0;
memcpy(&dst->s_addr, tmp, 4);
return addr-cp-1;
}
/*
* Resolve destination server from URL. Convert <str> to a sockaddr_storage.
* <out> contain the code of the dectected scheme, the start and length of
* the hostname. Actually only http and https are supported. <out> can be NULL.
* This function returns the consumed length. It is useful if you parse complete
* url like http://host:port/path, because the consumed length corresponds to
* the first character of the path. If the conversion fails, it returns -1.
*
* This function tries to resolve the DNS name if haproxy is in starting mode.
* So, this function may be used during the configuration parsing.
*/
int url2sa(const char *url, int ulen, struct sockaddr_storage *addr, struct split_url *out)
{
const char *curr = url, *cp = url;
const char *end;
int ret, url_code = 0;
unsigned long long int http_code = 0;
int default_port;
struct hostent *he;
char *p;
/* Firstly, try to find :// pattern */
while (curr < url+ulen && url_code != 0x3a2f2f) {
url_code = ((url_code & 0xffff) << 8);
url_code += (unsigned char)*curr++;
}
/* Secondly, if :// pattern is found, verify parsed stuff
* before pattern is matching our http pattern.
* If so parse ip address and port in uri.
*
* WARNING: Current code doesn't support dynamic async dns resolver.
*/
if (url_code != 0x3a2f2f)
return -1;
/* Copy scheme, and utrn to lower case. */
while (cp < curr - 3)
http_code = (http_code << 8) + *cp++;
http_code |= 0x2020202020202020ULL; /* Turn everything to lower case */
/* HTTP or HTTPS url matching */
if (http_code == 0x2020202068747470ULL) {
default_port = 80;
if (out)
out->scheme = SCH_HTTP;
}
else if (http_code == 0x2020206874747073ULL) {
default_port = 443;
if (out)
out->scheme = SCH_HTTPS;
}
else
return -1;
/* If the next char is '[', the host address is IPv6. */
if (*curr == '[') {
curr++;
/* Check trash size */
if (trash.size < ulen)
return -1;
/* Look for ']' and copy the address in a trash buffer. */
p = trash.str;
for (end = curr;
end < url + ulen && *end != ']';
end++, p++)
*p = *end;
if (*end != ']')
return -1;
*p = '\0';
/* Update out. */
if (out) {
out->host = curr;
out->host_len = end - curr;
}
/* Try IPv6 decoding. */
if (!inet_pton(AF_INET6, trash.str, &((struct sockaddr_in6 *)addr)->sin6_addr))
return -1;
end++;
/* Decode port. */
if (*end == ':') {
end++;
default_port = read_uint(&end, url + ulen);
}
((struct sockaddr_in6 *)addr)->sin6_port = htons(default_port);
((struct sockaddr_in6 *)addr)->sin6_family = AF_INET6;
return end - url;
}
else {
/* We are looking for IP address. If you want to parse and
* resolve hostname found in url, you can use str2sa_range(), but
* be warned this can slow down global daemon performances
* while handling lagging dns responses.
*/
ret = url2ipv4(curr, &((struct sockaddr_in *)addr)->sin_addr);
if (ret) {
/* Update out. */
if (out) {
out->host = curr;
out->host_len = ret;
}
curr += ret;
/* Decode port. */
if (*curr == ':') {
curr++;
default_port = read_uint(&curr, url + ulen);
}
((struct sockaddr_in *)addr)->sin_port = htons(default_port);
/* Set family. */
((struct sockaddr_in *)addr)->sin_family = AF_INET;
return curr - url;
}
else if (global.mode & MODE_STARTING) {
/* The IPv4 and IPv6 decoding fails, maybe the url contain name. Try to execute
* synchronous DNS request only if HAProxy is in the start state.
*/
/* look for : or / or end */
for (end = curr;
end < url + ulen && *end != '/' && *end != ':';
end++);
memcpy(trash.str, curr, end - curr);
trash.str[end - curr] = '\0';
/* try to resolve an IPv4/IPv6 hostname */
he = gethostbyname(trash.str);
if (!he)
return -1;
/* Update out. */
if (out) {
out->host = curr;
out->host_len = end - curr;
}
/* Decode port. */
if (*end == ':') {
end++;
default_port = read_uint(&end, url + ulen);
}
/* Copy IP address, set port and family. */
switch (he->h_addrtype) {
case AF_INET:
((struct sockaddr_in *)addr)->sin_addr = *(struct in_addr *) *(he->h_addr_list);
((struct sockaddr_in *)addr)->sin_port = htons(default_port);
((struct sockaddr_in *)addr)->sin_family = AF_INET;
return end - url;
case AF_INET6:
((struct sockaddr_in6 *)addr)->sin6_addr = *(struct in6_addr *) *(he->h_addr_list);
((struct sockaddr_in6 *)addr)->sin6_port = htons(default_port);
((struct sockaddr_in6 *)addr)->sin6_family = AF_INET6;
return end - url;
}
}
}
return -1;
}
/* Tries to convert a sockaddr_storage address to text form. Upon success, the
* address family is returned so that it's easy for the caller to adapt to the
* output format. Zero is returned if the address family is not supported. -1
* is returned upon error, with errno set. AF_INET, AF_INET6 and AF_UNIX are
* supported.
*/
int addr_to_str(struct sockaddr_storage *addr, char *str, int size)
{
void *ptr;
if (size < 5)
return 0;
*str = '\0';
switch (addr->ss_family) {
case AF_INET:
ptr = &((struct sockaddr_in *)addr)->sin_addr;
break;
case AF_INET6:
ptr = &((struct sockaddr_in6 *)addr)->sin6_addr;
break;
case AF_UNIX:
memcpy(str, "unix", 5);
return addr->ss_family;
default:
return 0;
}
if (inet_ntop(addr->ss_family, ptr, str, size))
return addr->ss_family;
/* failed */
return -1;
}
/* Tries to convert a sockaddr_storage port to text form. Upon success, the
* address family is returned so that it's easy for the caller to adapt to the
* output format. Zero is returned if the address family is not supported. -1
* is returned upon error, with errno set. AF_INET, AF_INET6 and AF_UNIX are
* supported.
*/
int port_to_str(struct sockaddr_storage *addr, char *str, int size)
{
uint16_t port;
if (size < 5)
return 0;
*str = '\0';
switch (addr->ss_family) {
case AF_INET:
port = ((struct sockaddr_in *)addr)->sin_port;
break;
case AF_INET6:
port = ((struct sockaddr_in6 *)addr)->sin6_port;
break;
case AF_UNIX:
memcpy(str, "unix", 5);
return addr->ss_family;
default:
return 0;
}
snprintf(str, size, "%u", ntohs(port));
return addr->ss_family;
}
/* will try to encode the string <string> replacing all characters tagged in
* <map> with the hexadecimal representation of their ASCII-code (2 digits)
* prefixed by <escape>, and will store the result between <start> (included)
* and <stop> (excluded), and will always terminate the string with a '\0'
* before <stop>. The position of the '\0' is returned if the conversion
* completes. If bytes are missing between <start> and <stop>, then the
* conversion will be incomplete and truncated. If <stop> <= <start>, the '\0'
* cannot even be stored so we return <start> without writing the 0.
* The input string must also be zero-terminated.
*/
const char hextab[16] = "0123456789ABCDEF";
char *encode_string(char *start, char *stop,
const char escape, const fd_set *map,
const char *string)
{
if (start < stop) {
stop--; /* reserve one byte for the final '\0' */
while (start < stop && *string != '\0') {
if (!FD_ISSET((unsigned char)(*string), map))
*start++ = *string;
else {
if (start + 3 >= stop)
break;
*start++ = escape;
*start++ = hextab[(*string >> 4) & 15];
*start++ = hextab[*string & 15];
}
string++;
}
*start = '\0';
}
return start;
}
/*
* Same behavior as encode_string() above, except that it encodes chunk
* <chunk> instead of a string.
*/
char *encode_chunk(char *start, char *stop,
const char escape, const fd_set *map,
const struct chunk *chunk)
{
char *str = chunk->str;
char *end = chunk->str + chunk->len;
if (start < stop) {
stop--; /* reserve one byte for the final '\0' */
while (start < stop && str < end) {
if (!FD_ISSET((unsigned char)(*str), map))
*start++ = *str;
else {
if (start + 3 >= stop)
break;
*start++ = escape;
*start++ = hextab[(*str >> 4) & 15];
*start++ = hextab[*str & 15];
}
str++;
}
*start = '\0';
}
return start;
}
/* Decode an URL-encoded string in-place. The resulting string might
* be shorter. If some forbidden characters are found, the conversion is
* aborted, the string is truncated before the issue and a negative value is
* returned, otherwise the operation returns the length of the decoded string.
*/
int url_decode(char *string)
{
char *in, *out;
int ret = -1;
in = string;
out = string;
while (*in) {
switch (*in) {
case '+' :
*out++ = ' ';
break;
case '%' :
if (!ishex(in[1]) || !ishex(in[2]))
goto end;
*out++ = (hex2i(in[1]) << 4) + hex2i(in[2]);
in += 2;
break;
default:
*out++ = *in;
break;
}
in++;
}
ret = out - string; /* success */
end:
*out = 0;
return ret;
}
unsigned int str2ui(const char *s)
{
return __str2ui(s);
}
unsigned int str2uic(const char *s)
{
return __str2uic(s);
}
unsigned int strl2ui(const char *s, int len)
{
return __strl2ui(s, len);
}
unsigned int strl2uic(const char *s, int len)
{
return __strl2uic(s, len);
}
unsigned int read_uint(const char **s, const char *end)
{
return __read_uint(s, end);
}
/* This one is 7 times faster than strtol() on athlon with checks.
* It returns the value of the number composed of all valid digits read,
* and can process negative numbers too.
*/
int strl2ic(const char *s, int len)
{
int i = 0;
int j, k;
if (len > 0) {
if (*s != '-') {
/* positive number */
while (len-- > 0) {
j = (*s++) - '0';
k = i * 10;
if (j > 9)
break;
i = k + j;
}
} else {
/* negative number */
s++;
while (--len > 0) {
j = (*s++) - '0';
k = i * 10;
if (j > 9)
break;
i = k - j;
}
}
}
return i;
}
/* This function reads exactly <len> chars from <s> and converts them to a
* signed integer which it stores into <ret>. It accurately detects any error
* (truncated string, invalid chars, overflows). It is meant to be used in
* applications designed for hostile environments. It returns zero when the
* number has successfully been converted, non-zero otherwise. When an error
* is returned, the <ret> value is left untouched. It is yet 5 to 40 times
* faster than strtol().
*/
int strl2irc(const char *s, int len, int *ret)
{
int i = 0;
int j;
if (!len)
return 1;
if (*s != '-') {
/* positive number */
while (len-- > 0) {
j = (*s++) - '0';
if (j > 9) return 1; /* invalid char */
if (i > INT_MAX / 10) return 1; /* check for multiply overflow */
i = i * 10;
if (i + j < i) return 1; /* check for addition overflow */
i = i + j;
}
} else {
/* negative number */
s++;
while (--len > 0) {
j = (*s++) - '0';
if (j > 9) return 1; /* invalid char */
if (i < INT_MIN / 10) return 1; /* check for multiply overflow */
i = i * 10;
if (i - j > i) return 1; /* check for subtract overflow */
i = i - j;
}
}
*ret = i;
return 0;
}
/* This function reads exactly <len> chars from <s> and converts them to a
* signed integer which it stores into <ret>. It accurately detects any error
* (truncated string, invalid chars, overflows). It is meant to be used in
* applications designed for hostile environments. It returns zero when the
* number has successfully been converted, non-zero otherwise. When an error
* is returned, the <ret> value is left untouched. It is about 3 times slower
* than str2irc().
*/
int strl2llrc(const char *s, int len, long long *ret)
{
long long i = 0;
int j;
if (!len)
return 1;
if (*s != '-') {
/* positive number */
while (len-- > 0) {
j = (*s++) - '0';
if (j > 9) return 1; /* invalid char */
if (i > LLONG_MAX / 10LL) return 1; /* check for multiply overflow */
i = i * 10LL;
if (i + j < i) return 1; /* check for addition overflow */
i = i + j;
}
} else {
/* negative number */
s++;
while (--len > 0) {
j = (*s++) - '0';
if (j > 9) return 1; /* invalid char */
if (i < LLONG_MIN / 10LL) return 1; /* check for multiply overflow */
i = i * 10LL;
if (i - j > i) return 1; /* check for subtract overflow */
i = i - j;
}
}
*ret = i;
return 0;
}
/* This function is used with pat_parse_dotted_ver(). It converts a string
* composed by two number separated by a dot. Each part must contain in 16 bits
* because internally they will be represented as a 32-bit quantity stored in
* a 64-bit integer. It returns zero when the number has successfully been
* converted, non-zero otherwise. When an error is returned, the <ret> value
* is left untouched.
*
* "1.3" -> 0x0000000000010003
* "65535.65535" -> 0x00000000ffffffff
*/
int strl2llrc_dotted(const char *text, int len, long long *ret)
{
const char *end = &text[len];
const char *p;
long long major, minor;
/* Look for dot. */
for (p = text; p < end; p++)
if (*p == '.')
break;
/* Convert major. */
if (strl2llrc(text, p - text, &major) != 0)
return 1;
/* Check major. */
if (major >= 65536)
return 1;
/* Convert minor. */
minor = 0;
if (p < end)
if (strl2llrc(p + 1, end - (p + 1), &minor) != 0)
return 1;
/* Check minor. */
if (minor >= 65536)
return 1;
/* Compose value. */
*ret = (major << 16) | (minor & 0xffff);
return 0;
}
/* This function parses a time value optionally followed by a unit suffix among
* "d", "h", "m", "s", "ms" or "us". It converts the value into the unit
* expected by the caller. The computation does its best to avoid overflows.
* The value is returned in <ret> if everything is fine, and a NULL is returned
* by the function. In case of error, a pointer to the error is returned and
* <ret> is left untouched. Values are automatically rounded up when needed.
*/
const char *parse_time_err(const char *text, unsigned *ret, unsigned unit_flags)
{
unsigned imult, idiv;
unsigned omult, odiv;
unsigned value;
omult = odiv = 1;
switch (unit_flags & TIME_UNIT_MASK) {
case TIME_UNIT_US: omult = 1000000; break;
case TIME_UNIT_MS: omult = 1000; break;
case TIME_UNIT_S: break;
case TIME_UNIT_MIN: odiv = 60; break;
case TIME_UNIT_HOUR: odiv = 3600; break;
case TIME_UNIT_DAY: odiv = 86400; break;
default: break;
}
value = 0;
while (1) {
unsigned int j;
j = *text - '0';
if (j > 9)
break;
text++;
value *= 10;
value += j;
}
imult = idiv = 1;
switch (*text) {
case '\0': /* no unit = default unit */
imult = omult = idiv = odiv = 1;
break;
case 's': /* second = unscaled unit */
break;
case 'u': /* microsecond : "us" */
if (text[1] == 's') {
idiv = 1000000;
text++;
}
break;
case 'm': /* millisecond : "ms" or minute: "m" */
if (text[1] == 's') {
idiv = 1000;
text++;
} else
imult = 60;
break;
case 'h': /* hour : "h" */
imult = 3600;
break;
case 'd': /* day : "d" */
imult = 86400;
break;
default:
return text;
break;
}
if (omult % idiv == 0) { omult /= idiv; idiv = 1; }
if (idiv % omult == 0) { idiv /= omult; omult = 1; }
if (imult % odiv == 0) { imult /= odiv; odiv = 1; }
if (odiv % imult == 0) { odiv /= imult; imult = 1; }
value = (value * (imult * omult) + (idiv * odiv - 1)) / (idiv * odiv);
*ret = value;
return NULL;
}
/* this function converts the string starting at <text> to an unsigned int
* stored in <ret>. If an error is detected, the pointer to the unexpected
* character is returned. If the conversio is succesful, NULL is returned.
*/
const char *parse_size_err(const char *text, unsigned *ret) {
unsigned value = 0;
while (1) {
unsigned int j;
j = *text - '0';
if (j > 9)
break;
if (value > ~0U / 10)
return text;
value *= 10;
if (value > (value + j))
return text;
value += j;
text++;
}
switch (*text) {
case '\0':
break;
case 'K':
case 'k':
if (value > ~0U >> 10)
return text;
value = value << 10;
break;
case 'M':
case 'm':
if (value > ~0U >> 20)
return text;
value = value << 20;
break;
case 'G':
case 'g':
if (value > ~0U >> 30)
return text;
value = value << 30;
break;
default:
return text;
}
*ret = value;
return NULL;
}
/*
* Parse binary string written in hexadecimal (source) and store the decoded
* result into binstr and set binstrlen to the lengh of binstr. Memory for
* binstr is allocated by the function. In case of error, returns 0 with an
* error message in err. In succes case, it returns the consumed length.
*/
int parse_binary(const char *source, char **binstr, int *binstrlen, char **err)
{
int len;
const char *p = source;
int i,j;
int alloc;
len = strlen(source);
if (len % 2) {
memprintf(err, "an even number of hex digit is expected");
return 0;
}
len = len >> 1;
if (!*binstr) {
*binstr = calloc(len, sizeof(char));
if (!*binstr) {
memprintf(err, "out of memory while loading string pattern");
return 0;
}
alloc = 1;
}
else {
if (*binstrlen < len) {
memprintf(err, "no space avalaible in the buffer. expect %d, provides %d",
len, *binstrlen);
return 0;
}
alloc = 0;
}
*binstrlen = len;
i = j = 0;
while (j < len) {
if (!ishex(p[i++]))
goto bad_input;
if (!ishex(p[i++]))
goto bad_input;
(*binstr)[j++] = (hex2i(p[i-2]) << 4) + hex2i(p[i-1]);
}
return len << 1;
bad_input:
memprintf(err, "an hex digit is expected (found '%c')", p[i-1]);
if (alloc)
free(binstr);
return 0;
}
/* copies at most <n> characters from <src> and always terminates with '\0' */
char *my_strndup(const char *src, int n)
{
int len = 0;
char *ret;
while (len < n && src[len])
len++;
ret = (char *)malloc(len + 1);
if (!ret)
return ret;
memcpy(ret, src, len);
ret[len] = '\0';
return ret;
}
/*
* search needle in haystack
* returns the pointer if found, returns NULL otherwise
*/
const void *my_memmem(const void *haystack, size_t haystacklen, const void *needle, size_t needlelen)
{
const void *c = NULL;
unsigned char f;
if ((haystack == NULL) || (needle == NULL) || (haystacklen < needlelen))
return NULL;
f = *(char *)needle;
c = haystack;
while ((c = memchr(c, f, haystacklen - (c - haystack))) != NULL) {
if ((haystacklen - (c - haystack)) < needlelen)
return NULL;
if (memcmp(c, needle, needlelen) == 0)
return c;
++c;
}
return NULL;
}
/* This function returns the first unused key greater than or equal to <key> in
* ID tree <root>. Zero is returned if no place is found.
*/
unsigned int get_next_id(struct eb_root *root, unsigned int key)
{
struct eb32_node *used;
do {
used = eb32_lookup_ge(root, key);
if (!used || used->key > key)
return key; /* key is available */
key++;
} while (key);
return key;
}
/* This function compares a sample word possibly followed by blanks to another
* clean word. The compare is case-insensitive. 1 is returned if both are equal,
* otherwise zero. This intends to be used when checking HTTP headers for some
* values. Note that it validates a word followed only by blanks but does not
* validate a word followed by blanks then other chars.
*/
int word_match(const char *sample, int slen, const char *word, int wlen)
{
if (slen < wlen)
return 0;
while (wlen) {
char c = *sample ^ *word;
if (c && c != ('A' ^ 'a'))
return 0;
sample++;
word++;
slen--;
wlen--;
}
while (slen) {
if (*sample != ' ' && *sample != '\t')
return 0;
sample++;
slen--;
}
return 1;
}
/* Converts any text-formatted IPv4 address to a host-order IPv4 address. It
* is particularly fast because it avoids expensive operations such as
* multiplies, which are optimized away at the end. It requires a properly
* formated address though (3 points).
*/
unsigned int inetaddr_host(const char *text)
{
const unsigned int ascii_zero = ('0' << 24) | ('0' << 16) | ('0' << 8) | '0';
register unsigned int dig100, dig10, dig1;
int s;
const char *p, *d;
dig1 = dig10 = dig100 = ascii_zero;
s = 24;
p = text;
while (1) {
if (((unsigned)(*p - '0')) <= 9) {
p++;
continue;
}
/* here, we have a complete byte between <text> and <p> (exclusive) */
if (p == text)
goto end;
d = p - 1;
dig1 |= (unsigned int)(*d << s);
if (d == text)
goto end;
d--;
dig10 |= (unsigned int)(*d << s);
if (d == text)
goto end;
d--;
dig100 |= (unsigned int)(*d << s);
end:
if (!s || *p != '.')
break;
s -= 8;
text = ++p;
}
dig100 -= ascii_zero;
dig10 -= ascii_zero;
dig1 -= ascii_zero;
return ((dig100 * 10) + dig10) * 10 + dig1;
}
/*
* Idem except the first unparsed character has to be passed in <stop>.
*/
unsigned int inetaddr_host_lim(const char *text, const char *stop)
{
const unsigned int ascii_zero = ('0' << 24) | ('0' << 16) | ('0' << 8) | '0';
register unsigned int dig100, dig10, dig1;
int s;
const char *p, *d;
dig1 = dig10 = dig100 = ascii_zero;
s = 24;
p = text;
while (1) {
if (((unsigned)(*p - '0')) <= 9 && p < stop) {
p++;
continue;
}
/* here, we have a complete byte between <text> and <p> (exclusive) */
if (p == text)
goto end;
d = p - 1;
dig1 |= (unsigned int)(*d << s);
if (d == text)
goto end;
d--;
dig10 |= (unsigned int)(*d << s);
if (d == text)
goto end;
d--;
dig100 |= (unsigned int)(*d << s);
end:
if (!s || p == stop || *p != '.')
break;
s -= 8;
text = ++p;
}
dig100 -= ascii_zero;
dig10 -= ascii_zero;
dig1 -= ascii_zero;
return ((dig100 * 10) + dig10) * 10 + dig1;
}
/*
* Idem except the pointer to first unparsed byte is returned into <ret> which
* must not be NULL.
*/
unsigned int inetaddr_host_lim_ret(char *text, char *stop, char **ret)
{
const unsigned int ascii_zero = ('0' << 24) | ('0' << 16) | ('0' << 8) | '0';
register unsigned int dig100, dig10, dig1;
int s;
char *p, *d;
dig1 = dig10 = dig100 = ascii_zero;
s = 24;
p = text;
while (1) {
if (((unsigned)(*p - '0')) <= 9 && p < stop) {
p++;
continue;
}
/* here, we have a complete byte between <text> and <p> (exclusive) */
if (p == text)
goto end;
d = p - 1;
dig1 |= (unsigned int)(*d << s);
if (d == text)
goto end;
d--;
dig10 |= (unsigned int)(*d << s);
if (d == text)
goto end;
d--;
dig100 |= (unsigned int)(*d << s);
end:
if (!s || p == stop || *p != '.')
break;
s -= 8;
text = ++p;
}
*ret = p;
dig100 -= ascii_zero;
dig10 -= ascii_zero;
dig1 -= ascii_zero;
return ((dig100 * 10) + dig10) * 10 + dig1;
}
/* Convert a fixed-length string to an IP address. Returns 0 in case of error,
* or the number of chars read in case of success. Maybe this could be replaced
* by one of the functions above. Also, apparently this function does not support
* hosts above 255 and requires exactly 4 octets.
* The destination is only modified on success.
*/
int buf2ip(const char *buf, size_t len, struct in_addr *dst)
{
const char *addr;
int saw_digit, octets, ch;
u_char tmp[4], *tp;
const char *cp = buf;
saw_digit = 0;
octets = 0;
*(tp = tmp) = 0;
for (addr = buf; addr - buf < len; addr++) {
unsigned char digit = (ch = *addr) - '0';
if (digit > 9 && ch != '.')
break;
if (digit <= 9) {
u_int new = *tp * 10 + digit;
if (new > 255)
return 0;
*tp = new;
if (!saw_digit) {
if (++octets > 4)
return 0;
saw_digit = 1;
}
} else if (ch == '.' && saw_digit) {
if (octets == 4)
return 0;
*++tp = 0;
saw_digit = 0;
} else
return 0;
}
if (octets < 4)
return 0;
memcpy(&dst->s_addr, tmp, 4);
return addr - cp;
}
/* This function converts the string in <buf> of the len <len> to
* struct in6_addr <dst> which must be allocated by the caller.
* This function returns 1 in success case, otherwise zero.
* The destination is only modified on success.
*/
int buf2ip6(const char *buf, size_t len, struct in6_addr *dst)
{
char null_term_ip6[INET6_ADDRSTRLEN + 1];
struct in6_addr out;
if (len > INET6_ADDRSTRLEN)
return 0;
memcpy(null_term_ip6, buf, len);
null_term_ip6[len] = '\0';
if (!inet_pton(AF_INET6, null_term_ip6, &out))
return 0;
*dst = out;
return 1;
}
/* To be used to quote config arg positions. Returns the short string at <ptr>
* surrounded by simple quotes if <ptr> is valid and non-empty, or "end of line"
* if ptr is NULL or empty. The string is locally allocated.
*/
const char *quote_arg(const char *ptr)
{
static char val[32];
int i;
if (!ptr || !*ptr)
return "end of line";
val[0] = '\'';
for (i = 1; i < sizeof(val) - 2 && *ptr; i++)
val[i] = *ptr++;
val[i++] = '\'';
val[i] = '\0';
return val;
}
/* returns an operator among STD_OP_* for string <str> or < 0 if unknown */
int get_std_op(const char *str)
{
int ret = -1;
if (*str == 'e' && str[1] == 'q')
ret = STD_OP_EQ;
else if (*str == 'n' && str[1] == 'e')
ret = STD_OP_NE;
else if (*str == 'l') {
if (str[1] == 'e') ret = STD_OP_LE;
else if (str[1] == 't') ret = STD_OP_LT;
}
else if (*str == 'g') {
if (str[1] == 'e') ret = STD_OP_GE;
else if (str[1] == 't') ret = STD_OP_GT;
}
if (ret == -1 || str[2] != '\0')
return -1;
return ret;
}
/* hash a 32-bit integer to another 32-bit integer */
unsigned int full_hash(unsigned int a)
{
return __full_hash(a);
}
/* Return non-zero if IPv4 address is part of the network,
* otherwise zero.
*/
int in_net_ipv4(struct in_addr *addr, struct in_addr *mask, struct in_addr *net)
{
return((addr->s_addr & mask->s_addr) == (net->s_addr & mask->s_addr));
}
/* Return non-zero if IPv6 address is part of the network,
* otherwise zero.
*/
int in_net_ipv6(struct in6_addr *addr, struct in6_addr *mask, struct in6_addr *net)
{
int i;
for (i = 0; i < sizeof(struct in6_addr) / sizeof(int); i++)
if (((((int *)addr)[i] & ((int *)mask)[i])) !=
(((int *)net)[i] & ((int *)mask)[i]))
return 0;
return 1;
}
/* RFC 4291 prefix */
const char rfc4291_pfx[] = { 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0xFF, 0xFF };
/* Map IPv4 adress on IPv6 address, as specified in RFC 3513.
* Input and output may overlap.
*/
void v4tov6(struct in6_addr *sin6_addr, struct in_addr *sin_addr)
{
struct in_addr tmp_addr;
tmp_addr.s_addr = sin_addr->s_addr;
memcpy(sin6_addr->s6_addr, rfc4291_pfx, sizeof(rfc4291_pfx));
memcpy(sin6_addr->s6_addr+12, &tmp_addr.s_addr, 4);
}
/* Map IPv6 adress on IPv4 address, as specified in RFC 3513.
* Return true if conversion is possible and false otherwise.
*/
int v6tov4(struct in_addr *sin_addr, struct in6_addr *sin6_addr)
{
if (memcmp(sin6_addr->s6_addr, rfc4291_pfx, sizeof(rfc4291_pfx)) == 0) {
memcpy(&(sin_addr->s_addr), &(sin6_addr->s6_addr[12]),
sizeof(struct in_addr));
return 1;
}
return 0;
}
char *human_time(int t, short hz_div) {
static char rv[sizeof("24855d23h")+1]; // longest of "23h59m" and "59m59s"
char *p = rv;
char *end = rv + sizeof(rv);
int cnt=2; // print two numbers
if (unlikely(t < 0 || hz_div <= 0)) {
snprintf(p, end - p, "?");
return rv;
}
if (unlikely(hz_div > 1))
t /= hz_div;
if (t >= DAY) {
p += snprintf(p, end - p, "%dd", t / DAY);
cnt--;
}
if (cnt && t % DAY / HOUR) {
p += snprintf(p, end - p, "%dh", t % DAY / HOUR);
cnt--;
}
if (cnt && t % HOUR / MINUTE) {
p += snprintf(p, end - p, "%dm", t % HOUR / MINUTE);
cnt--;
}
if ((cnt && t % MINUTE) || !t) // also display '0s'
p += snprintf(p, end - p, "%ds", t % MINUTE / SEC);
return rv;
}
const char *monthname[12] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
/* date2str_log: write a date in the format :
* sprintf(str, "%02d/%s/%04d:%02d:%02d:%02d.%03d",
* tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
* tm.tm_hour, tm.tm_min, tm.tm_sec, (int)date.tv_usec/1000);
*
* without using sprintf. return a pointer to the last char written (\0) or
* NULL if there isn't enough space.
*/
char *date2str_log(char *dst, struct tm *tm, struct timeval *date, size_t size)
{
if (size < 25) /* the size is fixed: 24 chars + \0 */
return NULL;
dst = utoa_pad((unsigned int)tm->tm_mday, dst, 3); // day
*dst++ = '/';
memcpy(dst, monthname[tm->tm_mon], 3); // month
dst += 3;
*dst++ = '/';
dst = utoa_pad((unsigned int)tm->tm_year+1900, dst, 5); // year
*dst++ = ':';
dst = utoa_pad((unsigned int)tm->tm_hour, dst, 3); // hour
*dst++ = ':';
dst = utoa_pad((unsigned int)tm->tm_min, dst, 3); // minutes
*dst++ = ':';
dst = utoa_pad((unsigned int)tm->tm_sec, dst, 3); // secondes
*dst++ = '.';
utoa_pad((unsigned int)(date->tv_usec/1000), dst, 4); // millisecondes
dst += 3; // only the 3 first digits
*dst = '\0';
return dst;
}
/* gmt2str_log: write a date in the format :
* "%02d/%s/%04d:%02d:%02d:%02d +0000" without using snprintf
* return a pointer to the last char written (\0) or
* NULL if there isn't enough space.
*/
char *gmt2str_log(char *dst, struct tm *tm, size_t size)
{
if (size < 27) /* the size is fixed: 26 chars + \0 */
return NULL;
dst = utoa_pad((unsigned int)tm->tm_mday, dst, 3); // day
*dst++ = '/';
memcpy(dst, monthname[tm->tm_mon], 3); // month
dst += 3;
*dst++ = '/';
dst = utoa_pad((unsigned int)tm->tm_year+1900, dst, 5); // year
*dst++ = ':';
dst = utoa_pad((unsigned int)tm->tm_hour, dst, 3); // hour
*dst++ = ':';
dst = utoa_pad((unsigned int)tm->tm_min, dst, 3); // minutes
*dst++ = ':';
dst = utoa_pad((unsigned int)tm->tm_sec, dst, 3); // secondes
*dst++ = ' ';
*dst++ = '+';
*dst++ = '0';
*dst++ = '0';
*dst++ = '0';
*dst++ = '0';
*dst = '\0';
return dst;
}
/* localdate2str_log: write a date in the format :
* "%02d/%s/%04d:%02d:%02d:%02d +0000(local timezone)" without using snprintf
* * return a pointer to the last char written (\0) or
* * NULL if there isn't enough space.
*/
char *localdate2str_log(char *dst, struct tm *tm, size_t size)
{
if (size < 27) /* the size is fixed: 26 chars + \0 */
return NULL;
dst = utoa_pad((unsigned int)tm->tm_mday, dst, 3); // day
*dst++ = '/';
memcpy(dst, monthname[tm->tm_mon], 3); // month
dst += 3;
*dst++ = '/';
dst = utoa_pad((unsigned int)tm->tm_year+1900, dst, 5); // year
*dst++ = ':';
dst = utoa_pad((unsigned int)tm->tm_hour, dst, 3); // hour
*dst++ = ':';
dst = utoa_pad((unsigned int)tm->tm_min, dst, 3); // minutes
*dst++ = ':';
dst = utoa_pad((unsigned int)tm->tm_sec, dst, 3); // secondes
*dst++ = ' ';
memcpy(dst, localtimezone, 5); // timezone
dst += 5;
*dst = '\0';
return dst;
}
/* Dynamically allocates a string of the proper length to hold the formatted
* output. NULL is returned on error. The caller is responsible for freeing the
* memory area using free(). The resulting string is returned in <out> if the
* pointer is not NULL. A previous version of <out> might be used to build the
* new string, and it will be freed before returning if it is not NULL, which
* makes it possible to build complex strings from iterative calls without
* having to care about freeing intermediate values, as in the example below :
*
* memprintf(&err, "invalid argument: '%s'", arg);
* ...
* memprintf(&err, "parser said : <%s>\n", *err);
* ...
* free(*err);
*
* This means that <err> must be initialized to NULL before first invocation.
* The return value also holds the allocated string, which eases error checking
* and immediate consumption. If the output pointer is not used, NULL must be
* passed instead and it will be ignored. The returned message will then also
* be NULL so that the caller does not have to bother with freeing anything.
*
* It is also convenient to use it without any free except the last one :
* err = NULL;
* if (!fct1(err)) report(*err);
* if (!fct2(err)) report(*err);
* if (!fct3(err)) report(*err);
* free(*err);
*/
char *memprintf(char **out, const char *format, ...)
{
va_list args;
char *ret = NULL;
int allocated = 0;
int needed = 0;
if (!out)
return NULL;
do {
/* vsnprintf() will return the required length even when the
* target buffer is NULL. We do this in a loop just in case
* intermediate evaluations get wrong.
*/
va_start(args, format);
needed = vsnprintf(ret, allocated, format, args);
va_end(args);
if (needed < allocated) {
/* Note: on Solaris 8, the first iteration always
* returns -1 if allocated is zero, so we force a
* retry.
*/
if (!allocated)
needed = 0;
else
break;
}
allocated = needed + 1;
ret = realloc(ret, allocated);
} while (ret);
if (needed < 0) {
/* an error was encountered */
free(ret);
ret = NULL;
}
if (out) {
free(*out);
*out = ret;
}
return ret;
}
/* Used to add <level> spaces before each line of <out>, unless there is only one line.
* The input argument is automatically freed and reassigned. The result will have to be
* freed by the caller. It also supports being passed a NULL which results in the same
* output.
* Example of use :
* parse(cmd, &err); (callee: memprintf(&err, ...))
* fprintf(stderr, "Parser said: %s\n", indent_error(&err));
* free(err);
*/
char *indent_msg(char **out, int level)
{
char *ret, *in, *p;
int needed = 0;
int lf = 0;
int lastlf = 0;
int len;
if (!out || !*out)
return NULL;
in = *out - 1;
while ((in = strchr(in + 1, '\n')) != NULL) {
lastlf = in - *out;
lf++;
}
if (!lf) /* single line, no LF, return it as-is */
return *out;
len = strlen(*out);
if (lf == 1 && lastlf == len - 1) {
/* single line, LF at end, strip it and return as-is */
(*out)[lastlf] = 0;
return *out;
}
/* OK now we have at least one LF, we need to process the whole string
* as a multi-line string. What we'll do :
* - prefix with an LF if there is none
* - add <level> spaces before each line
* This means at most ( 1 + level + (len-lf) + lf*<1+level) ) =
* 1 + level + len + lf * level = 1 + level * (lf + 1) + len.
*/
needed = 1 + level * (lf + 1) + len + 1;
p = ret = malloc(needed);
in = *out;
/* skip initial LFs */
while (*in == '\n')
in++;
/* copy each line, prefixed with LF and <level> spaces, and without the trailing LF */
while (*in) {
*p++ = '\n';
memset(p, ' ', level);
p += level;
do {
*p++ = *in++;
} while (*in && *in != '\n');
if (*in)
in++;
}
*p = 0;
free(*out);
*out = ret;
return ret;
}
/* Convert occurrences of environment variables in the input string to their
* corresponding value. A variable is identified as a series of alphanumeric
* characters or underscores following a '$' sign. The <in> string must be
* free()able. NULL returns NULL. The resulting string might be reallocated if
* some expansion is made. Variable names may also be enclosed into braces if
* needed (eg: to concatenate alphanum characters).
*/
char *env_expand(char *in)
{
char *txt_beg;
char *out;
char *txt_end;
char *var_beg;
char *var_end;
char *value;
char *next;
int out_len;
int val_len;
if (!in)
return in;
value = out = NULL;
out_len = 0;
txt_beg = in;
do {
/* look for next '$' sign in <in> */
for (txt_end = txt_beg; *txt_end && *txt_end != '$'; txt_end++);
if (!*txt_end && !out) /* end and no expansion performed */
return in;
val_len = 0;
next = txt_end;
if (*txt_end == '$') {
char save;
var_beg = txt_end + 1;
if (*var_beg == '{')
var_beg++;
var_end = var_beg;
while (isalnum((int)(unsigned char)*var_end) || *var_end == '_') {
var_end++;
}
next = var_end;
if (*var_end == '}' && (var_beg > txt_end + 1))
next++;
/* get value of the variable name at this location */
save = *var_end;
*var_end = '\0';
value = getenv(var_beg);
*var_end = save;
val_len = value ? strlen(value) : 0;
}
out = realloc(out, out_len + (txt_end - txt_beg) + val_len + 1);
if (txt_end > txt_beg) {
memcpy(out + out_len, txt_beg, txt_end - txt_beg);
out_len += txt_end - txt_beg;
}
if (val_len) {
memcpy(out + out_len, value, val_len);
out_len += val_len;
}
out[out_len] = 0;
txt_beg = next;
} while (*txt_beg);
/* here we know that <out> was allocated and that we don't need <in> anymore */
free(in);
return out;
}
/* same as strstr() but case-insensitive and with limit length */
const char *strnistr(const char *str1, int len_str1, const char *str2, int len_str2)
{
char *pptr, *sptr, *start;
unsigned int slen, plen;
unsigned int tmp1, tmp2;
if (str1 == NULL || len_str1 == 0) // search pattern into an empty string => search is not found
return NULL;
if (str2 == NULL || len_str2 == 0) // pattern is empty => every str1 match
return str1;
if (len_str1 < len_str2) // pattern is longer than string => search is not found
return NULL;
for (tmp1 = 0, start = (char *)str1, pptr = (char *)str2, slen = len_str1, plen = len_str2; slen >= plen; start++, slen--) {
while (toupper(*start) != toupper(*str2)) {
start++;
slen--;
tmp1++;
if (tmp1 >= len_str1)
return NULL;
/* if pattern longer than string */
if (slen < plen)
return NULL;
}
sptr = start;
pptr = (char *)str2;
tmp2 = 0;
while (toupper(*sptr) == toupper(*pptr)) {
sptr++;
pptr++;
tmp2++;
if (*pptr == '\0' || tmp2 == len_str2) /* end of pattern found */
return start;
if (*sptr == '\0' || tmp2 == len_str1) /* end of string found and the pattern is not fully found */
return NULL;
}
}
return NULL;
}
/* This function read the next valid utf8 char.
* <s> is the byte srray to be decode, <len> is its length.
* The function returns decoded char encoded like this:
* The 4 msb are the return code (UTF8_CODE_*), the 4 lsb
* are the length read. The decoded character is stored in <c>.
*/
unsigned char utf8_next(const char *s, int len, unsigned int *c)
{
const unsigned char *p = (unsigned char *)s;
int dec;
unsigned char code = UTF8_CODE_OK;
if (len < 1)
return UTF8_CODE_OK;
/* Check the type of UTF8 sequence
*
* 0... .... 0x00 <= x <= 0x7f : 1 byte: ascii char
* 10.. .... 0x80 <= x <= 0xbf : invalid sequence
* 110. .... 0xc0 <= x <= 0xdf : 2 bytes
* 1110 .... 0xe0 <= x <= 0xef : 3 bytes
* 1111 0... 0xf0 <= x <= 0xf7 : 4 bytes
* 1111 10.. 0xf8 <= x <= 0xfb : 5 bytes
* 1111 110. 0xfc <= x <= 0xfd : 6 bytes
* 1111 111. 0xfe <= x <= 0xff : invalid sequence
*/
switch (*p) {
case 0x00 ... 0x7f:
*c = *p;
return UTF8_CODE_OK | 1;
case 0x80 ... 0xbf:
*c = *p;
return UTF8_CODE_BADSEQ | 1;
case 0xc0 ... 0xdf:
if (len < 2) {
*c = *p;
return UTF8_CODE_BADSEQ | 1;
}
*c = *p & 0x1f;
dec = 1;
break;
case 0xe0 ... 0xef:
if (len < 3) {
*c = *p;
return UTF8_CODE_BADSEQ | 1;
}
*c = *p & 0x0f;
dec = 2;
break;
case 0xf0 ... 0xf7:
if (len < 4) {
*c = *p;
return UTF8_CODE_BADSEQ | 1;
}
*c = *p & 0x07;
dec = 3;
break;
case 0xf8 ... 0xfb:
if (len < 5) {
*c = *p;
return UTF8_CODE_BADSEQ | 1;
}
*c = *p & 0x03;
dec = 4;
break;
case 0xfc ... 0xfd:
if (len < 6) {
*c = *p;
return UTF8_CODE_BADSEQ | 1;
}
*c = *p & 0x01;
dec = 5;
break;
case 0xfe ... 0xff:
default:
*c = *p;
return UTF8_CODE_BADSEQ | 1;
}
p++;
while (dec > 0) {
/* need 0x10 for the 2 first bits */
if ( ( *p & 0xc0 ) != 0x80 )
return UTF8_CODE_BADSEQ | ((p-(unsigned char *)s)&0xffff);
/* add data at char */
*c = ( *c << 6 ) | ( *p & 0x3f );
dec--;
p++;
}
/* Check ovelong encoding.
* 1 byte : 5 + 6 : 11 : 0x80 ... 0x7ff
* 2 bytes : 4 + 6 + 6 : 16 : 0x800 ... 0xffff
* 3 bytes : 3 + 6 + 6 + 6 : 21 : 0x10000 ... 0x1fffff
*/
if ((*c >= 0x00 && *c <= 0x7f && (p-(unsigned char *)s) > 1) ||
(*c >= 0x80 && *c <= 0x7ff && (p-(unsigned char *)s) > 2) ||
(*c >= 0x800 && *c <= 0xffff && (p-(unsigned char *)s) > 3) ||
(*c >= 0x10000 && *c <= 0x1fffff && (p-(unsigned char *)s) > 4))
code |= UTF8_CODE_OVERLONG;
/* Check invalid UTF8 range. */
if ((*c >= 0xd800 && *c <= 0xdfff) ||
(*c >= 0xfffe && *c <= 0xffff))
code |= UTF8_CODE_INVRANGE;
return code | ((p-(unsigned char *)s)&0x0f);
}
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/
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