7ae931ce9c
In some cases you might want to use a specific address/interface when connecting to a server instead of the default one. With the global parameter 'local_address' it can now be specified which address to use.
1059 lines
29 KiB
C
1059 lines
29 KiB
C
/*
|
|
* Copyright (c) 2016 MariaDB Corporation Ab
|
|
*
|
|
* Use of this software is governed by the Business Source License included
|
|
* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
|
|
*
|
|
* Change Date: 2019-07-01
|
|
*
|
|
* On the date above, in accordance with the Business Source License, use
|
|
* of this software will be governed by version 2 or later of the General
|
|
* Public License.
|
|
*/
|
|
|
|
/**
|
|
* @file utils.c - General utility functions
|
|
*
|
|
* @verbatim
|
|
* Revision History
|
|
*
|
|
* Date Who Description
|
|
* 10-06-2013 Massimiliano Pinto Initial implementation
|
|
* 12-06-2013 Massimiliano Pinto Read function trought
|
|
* the gwbuff strategy
|
|
* 13-06-2013 Massimiliano Pinto MaxScale local authentication
|
|
* basics
|
|
* 02-09-2014 Martin Brampton Replaced C++ comments by C comments
|
|
*
|
|
* @endverbatim
|
|
*/
|
|
|
|
#include <maxscale/utils.h>
|
|
|
|
#include <fcntl.h>
|
|
#include <netdb.h>
|
|
#include <regex.h>
|
|
#include <arpa/inet.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
#include <netinet/tcp.h>
|
|
#include <openssl/sha.h>
|
|
|
|
#include <maxscale/alloc.h>
|
|
#include <maxscale/config.h>
|
|
#include <maxscale/dcb.h>
|
|
#include <maxscale/log_manager.h>
|
|
#include <maxscale/limits.h>
|
|
#include <maxscale/pcre2.h>
|
|
#include <maxscale/poll.h>
|
|
#include <maxscale/random_jkiss.h>
|
|
#include <maxscale/secrets.h>
|
|
#include <maxscale/session.h>
|
|
|
|
#if !defined(PATH_MAX)
|
|
# if defined(__USE_POSIX)
|
|
# define PATH_MAX _POSIX_PATH_MAX
|
|
# else
|
|
# define PATH_MAX 256
|
|
# endif
|
|
#endif
|
|
|
|
#define MAX_ERROR_MSG PATH_MAX
|
|
|
|
/* used in the hex2bin function */
|
|
#define char_val(X) (X >= '0' && X <= '9' ? X-'0' : \
|
|
X >= 'A' && X <= 'Z' ? X-'A'+10 : \
|
|
X >= 'a' && X <= 'z' ? X-'a'+10 : \
|
|
'\177')
|
|
|
|
/* used in the bin2hex function */
|
|
char hex_upper[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
|
|
char hex_lower[] = "0123456789abcdefghijklmnopqrstuvwxyz";
|
|
|
|
/**
|
|
* Check if the provided pathname is POSIX-compliant. The valid characters
|
|
* are [a-z A-Z 0-9._-].
|
|
* @param path A null-terminated string
|
|
* @return true if it is a POSIX-compliant pathname, otherwise false
|
|
*/
|
|
bool is_valid_posix_path(char* path)
|
|
{
|
|
char* ptr = path;
|
|
while (*ptr != '\0')
|
|
{
|
|
if (isalnum(*ptr) || *ptr == '/' || *ptr == '.' || *ptr == '-' || *ptr == '_')
|
|
{
|
|
ptr++;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/*****************************************
|
|
* backend read event triggered by EPOLLIN
|
|
*****************************************/
|
|
|
|
int setnonblocking(int fd)
|
|
{
|
|
int fl;
|
|
|
|
if ((fl = fcntl(fd, F_GETFL, 0)) == -1)
|
|
{
|
|
char errbuf[MXS_STRERROR_BUFLEN];
|
|
MXS_ERROR("Can't GET fcntl for %i, errno = %d, %s.",
|
|
fd,
|
|
errno,
|
|
strerror_r(errno, errbuf, sizeof(errbuf)));
|
|
return 1;
|
|
}
|
|
|
|
if (fcntl(fd, F_SETFL, fl | O_NONBLOCK) == -1)
|
|
{
|
|
char errbuf[MXS_STRERROR_BUFLEN];
|
|
MXS_ERROR("Can't SET fcntl for %i, errno = %d, %s",
|
|
fd,
|
|
errno,
|
|
strerror_r(errno, errbuf, sizeof(errbuf)));
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
char *gw_strend(register const char *s)
|
|
{
|
|
while (*s++)
|
|
{
|
|
;
|
|
}
|
|
return (char*) (s - 1);
|
|
}
|
|
|
|
/*****************************************
|
|
* generate a random char
|
|
*****************************************/
|
|
static char gw_randomchar()
|
|
{
|
|
return (char)((random_jkiss() % 78) + 30);
|
|
}
|
|
|
|
/*****************************************
|
|
* generate a random string
|
|
* output must be pre allocated
|
|
*****************************************/
|
|
int gw_generate_random_str(char *output, int len)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < len; ++i )
|
|
{
|
|
output[i] = gw_randomchar();
|
|
}
|
|
|
|
output[len] = '\0';
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************
|
|
* hex string to binary data
|
|
* output must be pre allocated
|
|
*****************************************/
|
|
int gw_hex2bin(uint8_t *out, const char *in, unsigned int len)
|
|
{
|
|
const char *in_end = in + len;
|
|
|
|
if (len == 0 || in == NULL)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
while (in < in_end)
|
|
{
|
|
register unsigned char b1 = char_val(*in);
|
|
uint8_t b2 = 0;
|
|
in++;
|
|
b2 = (b1 << 4) | char_val(*in);
|
|
*out++ = b2;
|
|
|
|
in++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************
|
|
* binary data to hex string
|
|
* output must be pre allocated
|
|
*****************************************/
|
|
char *gw_bin2hex(char *out, const uint8_t *in, unsigned int len)
|
|
{
|
|
const uint8_t *in_end = in + len;
|
|
if (len == 0 || in == NULL)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
for (; in != in_end; ++in)
|
|
{
|
|
*out++ = hex_upper[((uint8_t) * in) >> 4];
|
|
*out++ = hex_upper[((uint8_t) * in) & 0x0F];
|
|
}
|
|
*out = '\0';
|
|
|
|
return out;
|
|
}
|
|
|
|
/****************************************************
|
|
* fill a preallocated buffer with XOR(str1, str2)
|
|
* XOR between 2 equal len strings
|
|
* note that XOR(str1, XOR(str1 CONCAT str2)) == str2
|
|
* and that XOR(str1, str2) == XOR(str2, str1)
|
|
*****************************************************/
|
|
void gw_str_xor(uint8_t *output, const uint8_t *input1, const uint8_t *input2, unsigned int len)
|
|
{
|
|
const uint8_t *input1_end = NULL;
|
|
input1_end = input1 + len;
|
|
|
|
while (input1 < input1_end)
|
|
{
|
|
*output++ = *input1++ ^ *input2++;
|
|
}
|
|
}
|
|
|
|
/**********************************************************
|
|
* fill a 20 bytes preallocated with SHA1 digest (160 bits)
|
|
* for one input on in_len bytes
|
|
**********************************************************/
|
|
void gw_sha1_str(const uint8_t *in, int in_len, uint8_t *out)
|
|
{
|
|
unsigned char hash[SHA_DIGEST_LENGTH];
|
|
|
|
SHA1(in, in_len, hash);
|
|
memcpy(out, hash, SHA_DIGEST_LENGTH);
|
|
}
|
|
|
|
/********************************************************
|
|
* fill 20 bytes preallocated with SHA1 digest (160 bits)
|
|
* for two inputs, in_len and in2_len bytes
|
|
********************************************************/
|
|
void gw_sha1_2_str(const uint8_t *in, int in_len, const uint8_t *in2, int in2_len, uint8_t *out)
|
|
{
|
|
SHA_CTX context;
|
|
unsigned char hash[SHA_DIGEST_LENGTH];
|
|
|
|
SHA1_Init(&context);
|
|
SHA1_Update(&context, in, in_len);
|
|
SHA1_Update(&context, in2, in2_len);
|
|
SHA1_Final(hash, &context);
|
|
|
|
memcpy(out, hash, SHA_DIGEST_LENGTH);
|
|
}
|
|
|
|
|
|
/**
|
|
* node Gets errno corresponding to latest socket error
|
|
*
|
|
* Parameters:
|
|
* @param fd - in, use
|
|
* socket to examine
|
|
*
|
|
* @return errno
|
|
*
|
|
*
|
|
*/
|
|
int gw_getsockerrno(int fd)
|
|
{
|
|
int eno = 0;
|
|
socklen_t elen = sizeof(eno);
|
|
|
|
if (fd <= 0)
|
|
{
|
|
goto return_eno;
|
|
}
|
|
|
|
if (getsockopt(fd, SOL_SOCKET, SO_ERROR, (void *)&eno, &elen) != 0)
|
|
{
|
|
eno = 0;
|
|
}
|
|
|
|
return_eno:
|
|
return eno;
|
|
}
|
|
|
|
/**
|
|
* Create a HEX(SHA1(SHA1(password)))
|
|
*
|
|
* @param password The password to encrypt
|
|
* @return The new allocated encrypted password, that the caller must free
|
|
*
|
|
*/
|
|
char *create_hex_sha1_sha1_passwd(char *passwd)
|
|
{
|
|
uint8_t hash1[SHA_DIGEST_LENGTH] = "";
|
|
uint8_t hash2[SHA_DIGEST_LENGTH] = "";
|
|
char *hexpasswd = NULL;
|
|
|
|
if ((hexpasswd = (char *)MXS_CALLOC(SHA_DIGEST_LENGTH * 2 + 1, 1)) == NULL)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
/* hash1 is SHA1(real_password) */
|
|
gw_sha1_str((uint8_t *)passwd, strlen(passwd), hash1);
|
|
|
|
/* hash2 is the SHA1(input data), where input_data = SHA1(real_password) */
|
|
gw_sha1_str(hash1, SHA_DIGEST_LENGTH, hash2);
|
|
|
|
/* dbpass is the HEX form of SHA1(SHA1(real_password)) */
|
|
gw_bin2hex(hexpasswd, hash2, SHA_DIGEST_LENGTH);
|
|
|
|
return hexpasswd;
|
|
}
|
|
|
|
/**
|
|
* Remove duplicate and trailing forward slashes from a path.
|
|
* @param path Path to clean up
|
|
*/
|
|
bool clean_up_pathname(char *path)
|
|
{
|
|
char *data = path;
|
|
size_t len = strlen(path);
|
|
|
|
if (len > PATH_MAX)
|
|
{
|
|
MXS_ERROR("Pathname too long: %s", path);
|
|
return false;
|
|
}
|
|
|
|
while (*data != '\0')
|
|
{
|
|
if (*data == '/')
|
|
{
|
|
if (*(data + 1) == '/')
|
|
{
|
|
memmove(data, data + 1, len);
|
|
len--;
|
|
}
|
|
else if (*(data + 1) == '\0' && data != path)
|
|
{
|
|
*data = '\0';
|
|
}
|
|
else
|
|
{
|
|
data++;
|
|
len--;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
data++;
|
|
len--;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief Internal helper function for mkdir_all()
|
|
*
|
|
* @param path Path to create
|
|
* @param mask Bitmask to use
|
|
* @return True if directory exists or it was successfully created, false on error
|
|
*/
|
|
static bool mkdir_all_internal(char *path, mode_t mask)
|
|
{
|
|
bool rval = false;
|
|
|
|
if (mkdir(path, mask) == -1 && errno != EEXIST)
|
|
{
|
|
if (errno == ENOENT)
|
|
{
|
|
/** Try to create the parent directory */
|
|
char *ndir = strrchr(path, '/');
|
|
if (ndir)
|
|
{
|
|
*ndir = '\0';
|
|
if (mkdir_all_internal(path, mask))
|
|
{
|
|
/** Creation of the parent directory was successful, try to
|
|
* create the directory again */
|
|
*ndir = '/';
|
|
if (mkdir(path, mask) == 0)
|
|
{
|
|
rval = true;
|
|
}
|
|
else
|
|
{
|
|
char err[MXS_STRERROR_BUFLEN];
|
|
MXS_ERROR("Failed to create directory '%s': %d, %s",
|
|
path, errno, strerror_r(errno, err, sizeof(err)));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
char err[MXS_STRERROR_BUFLEN];
|
|
MXS_ERROR("Failed to create directory '%s': %d, %s",
|
|
path, errno, strerror_r(errno, err, sizeof(err)));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
rval = true;
|
|
}
|
|
|
|
return rval;
|
|
}
|
|
|
|
/**
|
|
* @brief Create a directory and any parent directories that do not exist
|
|
*
|
|
*
|
|
* @param path Path to create
|
|
* @param mask Bitmask to use
|
|
* @return True if directory exists or it was successfully created, false on error
|
|
*/
|
|
bool mxs_mkdir_all(const char *path, int mask)
|
|
{
|
|
char local_path[strlen(path) + 1];
|
|
strcpy(local_path, path);
|
|
|
|
if (local_path[sizeof(local_path) - 2] == '/')
|
|
{
|
|
local_path[sizeof(local_path) - 2] = '\0';
|
|
}
|
|
|
|
return mkdir_all_internal(local_path, (mode_t)mask);
|
|
}
|
|
|
|
char* trim_leading(char* str)
|
|
{
|
|
char* ptr = str;
|
|
|
|
while (isspace(*ptr))
|
|
{
|
|
ptr++;
|
|
}
|
|
|
|
if (ptr != str)
|
|
{
|
|
memmove(str, ptr, strlen(ptr) + 1);
|
|
}
|
|
|
|
return str;
|
|
}
|
|
|
|
char* trim_trailing(char* str)
|
|
{
|
|
char* ptr = strchr(str, '\0') - 1;
|
|
|
|
while (ptr > str && isspace(*ptr))
|
|
{
|
|
ptr--;
|
|
}
|
|
|
|
if (isspace(*(ptr + 1)))
|
|
{
|
|
*(ptr + 1) = '\0';
|
|
}
|
|
|
|
return str;
|
|
}
|
|
|
|
char* trim(char *str)
|
|
{
|
|
return trim_leading(trim_trailing(str));
|
|
}
|
|
|
|
/**
|
|
* Replace all whitespace with spaces and squeeze repeating whitespace characters
|
|
*
|
|
* @param str String to squeeze
|
|
* @return Squeezed string
|
|
*/
|
|
char* squeeze_whitespace(char* str)
|
|
{
|
|
char* store = str;
|
|
char* ptr = str;
|
|
|
|
/** Remove leading whitespace */
|
|
while (isspace(*ptr) && *ptr != '\0')
|
|
{
|
|
ptr++;
|
|
}
|
|
|
|
/** Squeeze all repeating whitespace */
|
|
while (*ptr != '\0')
|
|
{
|
|
while (isspace(*ptr) && isspace(*(ptr + 1)))
|
|
{
|
|
ptr++;
|
|
}
|
|
|
|
if (isspace(*ptr))
|
|
{
|
|
*store++ = ' ';
|
|
ptr++;
|
|
}
|
|
else
|
|
{
|
|
*store++ = *ptr++;
|
|
}
|
|
}
|
|
|
|
*store = '\0';
|
|
|
|
/** Remove trailing whitespace */
|
|
while (store > str && isspace(*(store - 1)))
|
|
{
|
|
store--;
|
|
*store = '\0';
|
|
}
|
|
|
|
return str;
|
|
}
|
|
|
|
/**
|
|
* Strip escape characters from a character string.
|
|
* @param String to parse.
|
|
* @return True if parsing was successful, false on errors.
|
|
*/
|
|
bool
|
|
strip_escape_chars(char* val)
|
|
{
|
|
int cur, end;
|
|
|
|
if (val == NULL)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
end = strlen(val) + 1;
|
|
cur = 0;
|
|
|
|
while (cur < end)
|
|
{
|
|
if (val[cur] == '\\')
|
|
{
|
|
memmove(val + cur, val + cur + 1, end - cur - 1);
|
|
end--;
|
|
}
|
|
cur++;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
#define BUFFER_GROWTH_RATE 2.0
|
|
static pcre2_code* remove_comments_re = NULL;
|
|
static const PCRE2_SPTR remove_comments_pattern = (PCRE2_SPTR)
|
|
"(?:`[^`]*`\\K)|"
|
|
"(\\/[*](?!(M?!)).*?[*]\\/)|"
|
|
"((?:#.*|--[[:space:]].*)(\\n|\\r\\n|$))";
|
|
|
|
/**
|
|
* Remove SQL comments from the end of a string
|
|
*
|
|
* The inline executable comments are not removed due to the fact that they can
|
|
* alter the behavior of the query.
|
|
* @param src Pointer to the string to modify.
|
|
* @param srcsize Pointer to a size_t variable which holds the length of the string to
|
|
* be modified.
|
|
* @param dest The address of the pointer where the result will be stored. If the
|
|
* value pointed by this parameter is NULL, new memory will be allocated as needed.
|
|
* @param Pointer to a size_t variable where the size of the result string is stored.
|
|
* @return Pointer to new modified string or NULL if memory allocation failed.
|
|
* If NULL is returned and the value pointed by @c dest was not NULL, no new
|
|
* memory will be allocated, the memory pointed by @dest will be freed and the
|
|
* contents of @c dest and @c destsize will be invalid.
|
|
*/
|
|
char* remove_mysql_comments(const char** src, const size_t* srcsize, char** dest, size_t* destsize)
|
|
{
|
|
static const PCRE2_SPTR replace = (PCRE2_SPTR) "";
|
|
pcre2_match_data* mdata;
|
|
char* output = *dest;
|
|
size_t orig_len = *srcsize;
|
|
size_t len = output ? *destsize : orig_len;
|
|
if (orig_len > 0)
|
|
{
|
|
if ((output || (output = (char*) malloc(len * sizeof (char)))) &&
|
|
(mdata = pcre2_match_data_create_from_pattern(remove_comments_re, NULL)))
|
|
{
|
|
size_t len_tmp = len;
|
|
while (pcre2_substitute(remove_comments_re, (PCRE2_SPTR) * src, orig_len, 0,
|
|
PCRE2_SUBSTITUTE_GLOBAL, mdata, NULL,
|
|
replace, PCRE2_ZERO_TERMINATED,
|
|
(PCRE2_UCHAR8*) output, &len_tmp) == PCRE2_ERROR_NOMEMORY)
|
|
{
|
|
len_tmp = (size_t) (len * BUFFER_GROWTH_RATE + 1);
|
|
char* tmp = (char*) realloc(output, len_tmp);
|
|
if (tmp == NULL)
|
|
{
|
|
free(output);
|
|
output = NULL;
|
|
break;
|
|
}
|
|
output = tmp;
|
|
len = len_tmp;
|
|
}
|
|
pcre2_match_data_free(mdata);
|
|
}
|
|
else
|
|
{
|
|
free(output);
|
|
output = NULL;
|
|
}
|
|
}
|
|
else if (output == NULL)
|
|
{
|
|
output = strdup(*src);
|
|
}
|
|
|
|
if (output)
|
|
{
|
|
*destsize = strlen(output);
|
|
*dest = output;
|
|
}
|
|
|
|
return output;
|
|
}
|
|
|
|
static pcre2_code* replace_values_re = NULL;
|
|
static const PCRE2_SPTR replace_values_pattern = (PCRE2_SPTR) "(?i)([-=,+*/([:space:]]|\\b|[@])"
|
|
"(?:[0-9.-]+|(?<=[@])[a-z_0-9]+)([-=,+*/)[:space:];]|$)";
|
|
|
|
/**
|
|
* Replace literal numbers and user variables with a question mark.
|
|
* @param src Pointer to the string to modify.
|
|
* @param srcsize Pointer to a size_t variable which holds the length of the string to
|
|
* be modified.
|
|
* @param dest The address of the pointer where the result will be stored. If the
|
|
* value pointed by this parameter is NULL, new memory will be allocated as needed.
|
|
* @param Pointer to a size_t variable where the size of the result string is stored.
|
|
* @return Pointer to new modified string or NULL if memory allocation failed.
|
|
* If NULL is returned and the value pointed by @c dest was not NULL, no new
|
|
* memory will be allocated, the memory pointed by @dest will be freed and the
|
|
* contents of @c dest and @c destsize will be invalid.
|
|
*/
|
|
char* replace_values(const char** src, const size_t* srcsize, char** dest, size_t* destsize)
|
|
{
|
|
static const PCRE2_SPTR replace = (PCRE2_SPTR) "$1?$2";
|
|
pcre2_match_data* mdata;
|
|
char* output = *dest;
|
|
size_t orig_len = *srcsize;
|
|
size_t len = output ? *destsize : orig_len;
|
|
|
|
if (orig_len > 0)
|
|
{
|
|
if ((output || (output = (char*) malloc(len * sizeof (char)))) &&
|
|
(mdata = pcre2_match_data_create_from_pattern(replace_values_re, NULL)))
|
|
{
|
|
size_t len_tmp = len;
|
|
while (pcre2_substitute(replace_values_re, (PCRE2_SPTR) * src, orig_len, 0,
|
|
PCRE2_SUBSTITUTE_GLOBAL, mdata, NULL,
|
|
replace, PCRE2_ZERO_TERMINATED,
|
|
(PCRE2_UCHAR8*) output, &len_tmp) == PCRE2_ERROR_NOMEMORY)
|
|
{
|
|
len_tmp = (size_t) (len * BUFFER_GROWTH_RATE + 1);
|
|
char* tmp = (char*) realloc(output, len_tmp);
|
|
if (tmp == NULL)
|
|
{
|
|
free(output);
|
|
output = NULL;
|
|
break;
|
|
}
|
|
output = tmp;
|
|
len = len_tmp;
|
|
}
|
|
pcre2_match_data_free(mdata);
|
|
}
|
|
else
|
|
{
|
|
free(output);
|
|
output = NULL;
|
|
}
|
|
}
|
|
else if (output == NULL)
|
|
{
|
|
output = strdup(*src);
|
|
}
|
|
|
|
if (output)
|
|
{
|
|
*destsize = strlen(output);
|
|
*dest = output;
|
|
}
|
|
|
|
return output;
|
|
}
|
|
|
|
/**
|
|
* Find the given needle - user-provided literal - and replace it with
|
|
* replacement string. Separate user-provided literals from matching table names
|
|
* etc. by searching only substrings preceded by non-letter and non-number.
|
|
*
|
|
* @param haystack Plain text query string, not to be freed
|
|
* @param needle Substring to be searched, not to be freed
|
|
* @param replacement Replacement text, not to be freed
|
|
*
|
|
* @return newly allocated string where needle is replaced
|
|
*/
|
|
char* replace_literal(char* haystack, const char* needle, const char* replacement)
|
|
{
|
|
const char* prefix = "[ ='\",\\(]"; /*< ' ','=','(',''',''"',',' are allowed before needle */
|
|
const char* suffix = "([^[:alnum:]]|$)"; /*< alpha-num chars aren't allowed after the needle */
|
|
char* search_re;
|
|
char* newstr;
|
|
regex_t re;
|
|
regmatch_t match;
|
|
int rc;
|
|
size_t rlen = strlen(replacement);
|
|
size_t nlen = strlen(needle);
|
|
size_t hlen = strlen(haystack);
|
|
|
|
search_re = (char *) malloc(strlen(prefix) + nlen + strlen(suffix) + 1);
|
|
|
|
if (search_re == NULL)
|
|
{
|
|
char errbuf[MXS_STRERROR_BUFLEN];
|
|
fprintf(stderr, "Regex memory allocation failed : %s\n",
|
|
strerror_r(errno, errbuf, sizeof (errbuf)));
|
|
newstr = haystack;
|
|
goto retblock;
|
|
}
|
|
|
|
sprintf(search_re, "%s%s%s", prefix, needle, suffix);
|
|
/** Allocate memory for new string +1 for terminating byte */
|
|
newstr = (char *) malloc(hlen - nlen + rlen + 1);
|
|
|
|
if (newstr == NULL)
|
|
{
|
|
char errbuf[MXS_STRERROR_BUFLEN];
|
|
fprintf(stderr, "Regex memory allocation failed : %s\n",
|
|
strerror_r(errno, errbuf, sizeof (errbuf)));
|
|
free(search_re);
|
|
free(newstr);
|
|
newstr = haystack;
|
|
goto retblock;
|
|
}
|
|
|
|
rc = regcomp(&re, search_re, REG_EXTENDED | REG_ICASE);
|
|
ss_info_dassert(rc == 0, "Regex check");
|
|
|
|
if (rc != 0)
|
|
{
|
|
char error_message[MAX_ERROR_MSG];
|
|
regerror(rc, &re, error_message, MAX_ERROR_MSG);
|
|
fprintf(stderr, "Regex error compiling '%s': %s\n",
|
|
search_re, error_message);
|
|
free(search_re);
|
|
free(newstr);
|
|
newstr = haystack;
|
|
goto retblock;
|
|
}
|
|
rc = regexec(&re, haystack, 1, &match, 0);
|
|
|
|
if (rc != 0)
|
|
{
|
|
free(search_re);
|
|
free(newstr);
|
|
regfree(&re);
|
|
newstr = haystack;
|
|
goto retblock;
|
|
}
|
|
memcpy(newstr, haystack, match.rm_so + 1);
|
|
memcpy(newstr + match.rm_so + 1, replacement, rlen);
|
|
/** +1 is terminating byte */
|
|
memcpy(newstr + match.rm_so + 1 + rlen, haystack + match.rm_so + 1 + nlen,
|
|
hlen - (match.rm_so + 1) - nlen + 1);
|
|
|
|
regfree(&re);
|
|
free(haystack);
|
|
free(search_re);
|
|
retblock:
|
|
return newstr;
|
|
}
|
|
|
|
static pcre2_code* replace_quoted_re = NULL;
|
|
static const PCRE2_SPTR replace_quoted_pattern = (PCRE2_SPTR)
|
|
"(?>[^'\"]*)(?|(?:\"\\K(?:(?:(?<=\\\\)\")|[^\"])*(\"))|(?:'\\K(?:(?:(?<=\\\\)')|[^'])*(')))";
|
|
|
|
/**
|
|
* Replace contents of single or double quoted strings with question marks.
|
|
* @param src Pointer to the string to modify.
|
|
* @param srcsize Pointer to a size_t variable which holds the length of the string to
|
|
* be modified.
|
|
* @param dest The address of the pointer where the result will be stored. If the
|
|
* value pointed by this parameter is NULL, new memory will be allocated as needed.
|
|
* @param Pointer to a size_t variable where the size of the result string is stored.
|
|
* @return Pointer to new modified string or NULL if memory allocation failed.
|
|
* If NULL is returned and the value pointed by @c dest was not NULL, no new
|
|
* memory will be allocated, the memory pointed by @dest will be freed and the
|
|
* contents of @c dest and @c destsize will be invalid.
|
|
*/
|
|
char* replace_quoted(const char** src, const size_t* srcsize, char** dest, size_t* destsize)
|
|
{
|
|
static const PCRE2_SPTR replace = (PCRE2_SPTR) "?$1";
|
|
pcre2_match_data* mdata;
|
|
char* output = *dest;
|
|
size_t orig_len = *srcsize;
|
|
size_t len = output ? *destsize : orig_len;
|
|
|
|
if (orig_len > 0)
|
|
{
|
|
if ((output || (output = (char*) malloc(len * sizeof (char)))) &&
|
|
(mdata = pcre2_match_data_create_from_pattern(replace_quoted_re, NULL)))
|
|
{
|
|
size_t len_tmp = len;
|
|
while (pcre2_substitute(replace_quoted_re, (PCRE2_SPTR) * src, orig_len, 0,
|
|
PCRE2_SUBSTITUTE_GLOBAL, mdata, NULL,
|
|
replace, PCRE2_ZERO_TERMINATED,
|
|
(PCRE2_UCHAR8*) output, &len_tmp) == PCRE2_ERROR_NOMEMORY)
|
|
{
|
|
len_tmp = (size_t) (len * BUFFER_GROWTH_RATE + 1);
|
|
char* tmp = (char*) realloc(output, len_tmp);
|
|
if (tmp == NULL)
|
|
{
|
|
free(output);
|
|
output = NULL;
|
|
break;
|
|
}
|
|
output = tmp;
|
|
len = len_tmp;
|
|
}
|
|
pcre2_match_data_free(mdata);
|
|
}
|
|
else
|
|
{
|
|
free(output);
|
|
output = NULL;
|
|
}
|
|
}
|
|
else if (output == NULL)
|
|
{
|
|
output = strdup(*src);
|
|
}
|
|
|
|
if (output)
|
|
{
|
|
*destsize = strlen(output);
|
|
*dest = output;
|
|
}
|
|
else
|
|
{
|
|
*dest = NULL;
|
|
}
|
|
|
|
return output;
|
|
}
|
|
|
|
/**
|
|
* Initialize the utils library
|
|
*
|
|
* This function initializes structures used in various functions.
|
|
* @return true on success, false on error
|
|
*/
|
|
bool utils_init()
|
|
{
|
|
bool rval = true;
|
|
|
|
PCRE2_SIZE erroffset;
|
|
int errcode;
|
|
|
|
ss_info_dassert(remove_comments_re == NULL, "utils_init called multiple times");
|
|
remove_comments_re = pcre2_compile(remove_comments_pattern, PCRE2_ZERO_TERMINATED, 0, &errcode,
|
|
&erroffset, NULL);
|
|
if (remove_comments_re == NULL)
|
|
{
|
|
rval = false;
|
|
}
|
|
|
|
ss_info_dassert(replace_quoted_re == NULL, "utils_init called multiple times");
|
|
replace_quoted_re = pcre2_compile(replace_quoted_pattern, PCRE2_ZERO_TERMINATED, 0, &errcode,
|
|
&erroffset, NULL);
|
|
if (replace_quoted_re == NULL)
|
|
{
|
|
rval = false;
|
|
}
|
|
|
|
ss_info_dassert(replace_values_re == NULL, "utils_init called multiple times");
|
|
replace_values_re = pcre2_compile(replace_values_pattern, PCRE2_ZERO_TERMINATED, 0, &errcode,
|
|
&erroffset, NULL);
|
|
if (replace_values_re == NULL)
|
|
{
|
|
rval = false;
|
|
}
|
|
|
|
return rval;
|
|
}
|
|
|
|
/**
|
|
* Close the utils library. This should be the last call to this library.
|
|
*/
|
|
void utils_end()
|
|
{
|
|
pcre2_code_free(remove_comments_re);
|
|
remove_comments_re = NULL;
|
|
pcre2_code_free(replace_quoted_re);
|
|
replace_quoted_re = NULL;
|
|
pcre2_code_free(replace_values_re);
|
|
replace_values_re = NULL;
|
|
}
|
|
|
|
SPINLOCK tmplock = SPINLOCK_INIT;
|
|
|
|
static bool configure_network_socket(int so)
|
|
{
|
|
int sndbufsize = MXS_BACKEND_SO_SNDBUF;
|
|
int rcvbufsize = MXS_BACKEND_SO_RCVBUF;
|
|
int one = 1;
|
|
|
|
if (setsockopt(so, SOL_SOCKET, SO_SNDBUF, &sndbufsize, sizeof(sndbufsize)) != 0 ||
|
|
setsockopt(so, SOL_SOCKET, SO_RCVBUF, &rcvbufsize, sizeof(rcvbufsize)) != 0 ||
|
|
setsockopt(so, IPPROTO_TCP, TCP_NODELAY, &one, sizeof(one)) != 0)
|
|
{
|
|
MXS_ERROR("Failed to set socket option: %d, %s.", errno, mxs_strerror(errno));
|
|
return false;
|
|
}
|
|
|
|
return setnonblocking(so) == 0;
|
|
}
|
|
|
|
static bool configure_listener_socket(int so)
|
|
{
|
|
int one = 1;
|
|
|
|
if (setsockopt(so, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) != 0 ||
|
|
setsockopt(so, IPPROTO_TCP, TCP_NODELAY, &one, sizeof(one)) != 0)
|
|
{
|
|
MXS_ERROR("Failed to set socket option: %d, %s.", errno, mxs_strerror(errno));
|
|
return false;
|
|
}
|
|
|
|
return setnonblocking(so) == 0;
|
|
}
|
|
|
|
static void set_port(struct sockaddr_storage *addr, uint16_t port)
|
|
{
|
|
if (addr->ss_family == AF_INET)
|
|
{
|
|
struct sockaddr_in *ip = (struct sockaddr_in*)addr;
|
|
ip->sin_port = htons(port);
|
|
}
|
|
else if (addr->ss_family == AF_INET6)
|
|
{
|
|
struct sockaddr_in6 *ip = (struct sockaddr_in6*)addr;
|
|
ip->sin6_port = htons(port);
|
|
}
|
|
else
|
|
{
|
|
MXS_ERROR("Unknown address family: %d", (int)addr->ss_family);
|
|
ss_dassert(false);
|
|
}
|
|
}
|
|
|
|
int open_network_socket(enum mxs_socket_type type, struct sockaddr_storage *addr, const char *host, uint16_t port)
|
|
{
|
|
ss_dassert(type == MXS_SOCKET_NETWORK || type == MXS_SOCKET_LISTENER);
|
|
#ifdef __USE_POSIX
|
|
struct addrinfo *ai = NULL, hint = {};
|
|
int so = 0, rc = 0;
|
|
hint.ai_socktype = SOCK_STREAM;
|
|
hint.ai_family = AF_UNSPEC;
|
|
hint.ai_flags = AI_ALL;
|
|
|
|
if ((rc = getaddrinfo(host, NULL, &hint, &ai)) != 0)
|
|
{
|
|
MXS_ERROR("Failed to obtain address for host %s: %s", host, gai_strerror(rc));
|
|
return -1;
|
|
}
|
|
|
|
/* Take the first one */
|
|
if (ai)
|
|
{
|
|
if ((so = socket(ai->ai_family, SOCK_STREAM, 0)) == -1)
|
|
{
|
|
MXS_ERROR("Socket creation failed: %d, %s.", errno, mxs_strerror(errno));
|
|
}
|
|
else
|
|
{
|
|
memcpy(addr, ai->ai_addr, ai->ai_addrlen);
|
|
set_port(addr, port);
|
|
|
|
freeaddrinfo(ai);
|
|
|
|
if ((type == MXS_SOCKET_NETWORK && !configure_network_socket(so)) ||
|
|
(type == MXS_SOCKET_LISTENER && !configure_listener_socket(so)))
|
|
{
|
|
close(so);
|
|
so = -1;
|
|
}
|
|
else if (type == MXS_SOCKET_NETWORK)
|
|
{
|
|
MXS_CONFIG* config = config_get_global_options();
|
|
|
|
if (config->local_address)
|
|
{
|
|
if ((rc = getaddrinfo(config->local_address, NULL, &hint, &ai)) == 0)
|
|
{
|
|
struct sockaddr_storage local_address = {};
|
|
|
|
memcpy(&local_address, ai->ai_addr, ai->ai_addrlen);
|
|
freeaddrinfo(ai);
|
|
|
|
if (bind(so, (struct sockaddr*)&local_address, sizeof(local_address)) == 0)
|
|
{
|
|
MXS_INFO("Bound connecting socket to \"%s\".", config->local_address);
|
|
}
|
|
else
|
|
{
|
|
MXS_ERROR("Could not bind connecting socket to local address \"%s\", "
|
|
"connecting to server using default local address: %s",
|
|
config->local_address, mxs_strerror(errno));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
MXS_ERROR("Could not get address information for local address \"%s\", "
|
|
"connecting to server using default local address: %s",
|
|
config->local_address, mxs_strerror(errno));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#else
|
|
#error Only the POSIX networking interface is supported
|
|
#endif
|
|
|
|
return so;
|
|
}
|
|
|
|
/**
|
|
* Return the number of processors available.
|
|
* @return Number of processors or 1 if the required definition of _SC_NPROCESSORS_CONF
|
|
* is not found
|
|
*/
|
|
long get_processor_count()
|
|
{
|
|
long processors = 1;
|
|
#ifdef _SC_NPROCESSORS_ONLN
|
|
if ((processors = sysconf(_SC_NPROCESSORS_ONLN)) <= 0)
|
|
{
|
|
MXS_WARNING("Unable to establish the number of available cores. Defaulting to 1.");
|
|
processors = 1;
|
|
}
|
|
#else
|
|
#error _SC_NPROCESSORS_ONLN not available.
|
|
#endif
|
|
return processors;
|
|
}
|