osip_port.c

libosip2-3.0.3最新版本

/*
  The oSIP library implements the Session Initiation Protocol (SIP -rfc3261-)
  Copyright (C) 2001,2002,2003,2004,2005,2006,2007 Aymeric MOIZARD [e-mail]
  
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.
  
  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.
  
  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#ifdef _WIN32_WCE
#define _INC_TIME               /* for wce.h */
#include <windows.h>
#endif


#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>

#include <osipparser2/osip_port.h>

#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif

#ifdef HAVE_CTYPE_H
#include <ctype.h>
#endif

#if defined(__PALMOS__) && (__PALMOS__ < 0x06000000)
#	include <TimeMgr.h>
#	include <SysUtils.h>
#	include <SystemMgr.h>
#	include <StringMgr.h>
#else
#	include <time.h>
#endif

#if defined(__VXWORKS_OS__)
#include <selectLib.h>

/* needed for snprintf replacement */
#include <vxWorks.h>
#include <fioLib.h>
#include <string.h>

#elif defined(__PALMOS__)
#	if __PALMOS__ >= 0x06000000
#		include <sys/time.h>
#		include <SysThread.h>
#	endif
#elif (!defined(WIN32) && !defined(_WIN32_WCE))
#include <sys/time.h>
#elif defined(WIN32)
#include <windows.h>
#ifdef WIN32_USE_CRYPTO
#include <Wincrypt.h>
#endif
#endif

#if defined (__rtems__)
#include <rtems.h>
#endif 

#if defined (HAVE_SYS_UNISTD_H)
#  include <sys/unistd.h>
#endif

#if defined (HAVE_UNISTD_H)
#  include <unistd.h>
#endif

#if defined (HAVE_SYSLOG_H) && !defined(__arc__)
#  include <syslog.h>
#endif

#if defined (HAVE_SYS_SELECT_H)
#  include <sys/select.h>
#endif

#ifdef HAVE_PTH_PTHREAD_H
#include <pthread.h>
#endif

#if defined(__arc__)
#define HAVE_LRAND48
#endif

FILE *logfile = NULL;
int tracing_table[END_TRACE_LEVEL];
static int use_syslog = 0;
static osip_trace_func_t *trace_func = 0;

static unsigned int random_seed_set = 0;

#ifndef MINISIZE
#if !defined(WIN32) && !defined(_WIN32_WCE)
osip_malloc_func_t *osip_malloc_func = 0;
osip_realloc_func_t *osip_realloc_func = 0;
osip_free_func_t *osip_free_func = 0;
#endif
#endif

#ifndef WIN32_USE_CRYPTO
unsigned int
osip_build_random_number ()
#else
static unsigned int
osip_fallback_random_number ()
#endif
{
  if (!random_seed_set)
    {
      unsigned int ticks;

#ifdef __PALMOS__
#	if __PALMOS__ < 0x06000000
      SysRandom ((Int32) TimGetTicks ());
#	else
      struct timeval tv;

      gettimeofday (&tv, NULL);
      srand (tv.tv_usec);
      ticks = tv.tv_sec + tv.tv_usec;
#	endif
#elif defined(WIN32)
      LARGE_INTEGER lCount;

      QueryPerformanceCounter (&lCount);
      ticks = lCount.LowPart + lCount.HighPart;
#elif defined(_WIN32_WCE)
      ticks = GetTickCount ();
#elif defined(__PSOS__)
#elif defined(__rtems__)
        rtems_clock_get( RTEMS_CLOCK_GET_TICKS_SINCE_BOOT, &ticks);
#elif defined(__VXWORKS_OS__)
      struct timespec tp;

      clock_gettime (CLOCK_REALTIME, &tp);
      ticks = tp.tv_sec + tp.tv_nsec;
#else
      struct timeval tv;
      int fd;

      gettimeofday (&tv, NULL);
      ticks = tv.tv_sec + tv.tv_usec;
      fd = open ("/dev/urandom", O_RDONLY);
      if (fd > 0)
        {
          unsigned int r;
          int i;

          for (i = 0; i < 512; i++)
            {
              read (fd, &r, sizeof (r));
              ticks += r;
            }
          close (fd);
        }
#endif

#ifdef HAVE_LRAND48
      srand48 (ticks);
#else
      srand (ticks);
#endif
      random_seed_set = 1;
    }
#ifdef HAVE_LRAND48
  {
    int val = lrand48();
    if (val==0)
      {
	unsigned int ticks;
	struct timeval tv;
	gettimeofday (&tv, NULL);
	ticks = tv.tv_sec + tv.tv_usec;
	srand48 (ticks);
	return lrand48 ();
      }

    return val;
  }
#else
  return rand ();
#endif
}

#ifdef WIN32_USE_CRYPTO

unsigned int
osip_build_random_number ()
{
  HCRYPTPROV crypto;
  BOOL err;
  unsigned int num;

  err =
    CryptAcquireContext (&crypto, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT);
  if (err)
    {
      err = CryptGenRandom (crypto, sizeof (num), (BYTE *) & num);
      CryptReleaseContext (crypto, 0);
    }
  if (!err)
    {
      num = osip_fallback_random_number ();
    }
  return num;
}

#endif

#if defined(__linux)
#include <limits.h>
#endif


char *
osip_strncpy (char *dest, const char *src, size_t length)
{
  strncpy (dest, src, length);
  dest[length] = '\0';
  return dest;
}

#undef osip_strdup

char *
osip_strdup (const char *ch)
{
  char *copy;
  size_t length;

  if (ch == NULL)
    return NULL;
  length = strlen (ch);
  copy = (char *) osip_malloc (length + 1);
  osip_strncpy (copy, ch, length);
  return copy;
}

#ifndef MINISIZE
int
osip_atoi (const char *number)
{
#if defined(__linux) || defined(HAVE_STRTOL)
  int i;

  if (number == NULL)
    return -1;
  i = strtol (number, (char **) NULL, 10);
  if (i == LONG_MIN || i == LONG_MAX)
    return -1;
  return i;
#endif

  return atoi (number);
}

#endif

/* append string_osip_to_append to string at position cur
   size is the current allocated size of the element
*/
char *
__osip_sdp_append_string (char *string, size_t size, char *cur,
                          char *string_osip_to_append)
{
  size_t length = strlen (string_osip_to_append);

  if (cur - string + length > size)
    {
      size_t length2;

      length2 = cur - string;
      string = osip_realloc (string, size + length + 10);
      cur = string + length2;   /* the initial allocation may have changed! */
    }
  osip_strncpy (cur, string_osip_to_append, length);
  return cur + strlen (cur);
}

void
osip_usleep (int useconds)
{
#if defined(__PALMOS__) && (__PALMOS__ >= 0x06000000)
  /* This bit will work for the Protein API, but not the Palm 68K API */
  nsecs_t nanoseconds = useconds * 1000;

  SysThreadDelay (nanoseconds, P_ABSOLUTE_TIMEOUT);
#elif defined(__PALMOS__) && (__PALMOS__ < 0x06000000)
  UInt32 stoptime = TimGetTicks () + (useconds / 1000000) * SysTicksPerSecond ();

  while (stoptime > TimGetTicks ())
    /* I wish there was some type of yield function here */
    ;
#elif defined(WIN32)
  Sleep (useconds / 1000);
#elif defined(__rtems__)
    rtems_task_wake_after( RTEMS_MICROSECONDS_TO_TICKS(useconds) );
#elif defined(__arc__)
  struct timespec req;
  struct timespec rem;
  req.tv_sec = (int) useconds / 1000000;
  req.tv_nsec = (int) (useconds % 1000000)*1000;
  nanosleep (&req, &rem);
#else
  struct timeval delay;
  int sec;

  sec = (int) useconds / 1000000;
  if (sec > 0)
    {
      delay.tv_sec = sec;
      delay.tv_usec = 0;
  } else
    {
      delay.tv_sec = 0;
      delay.tv_usec = useconds;
    }
  select (0, 0, 0, 0, &delay);
#endif
}

char *
osip_strdup_without_quote (const char *ch)
{
  char *copy = (char *) osip_malloc (strlen (ch) + 1);

  /* remove leading and trailing " */
  if ((*ch == '\"'))
    {
      osip_strncpy (copy, ch + 1, strlen (ch + 1));
      osip_strncpy (copy + strlen (copy) - 1, "\0", 1);
  } else
    osip_strncpy (copy, ch, strlen (ch));
  return copy;
}

int
osip_tolower (char *word)
{
#if defined(HAVE_CTYPE_H) && !defined (_WIN32_WCE)

  for (; *word; word++)
    *word = (char) tolower (*word);
#else
  size_t i;
  size_t len = strlen (word);

  for (i = 0; i <= len - 1; i++)
    {
      if ('A' <= word[i] && word[i] <= 'Z')
        word[i] = word[i] + 32;
    }
#endif
  return 0;
}

#ifndef MINISIZE
int
osip_strcasecmp (const char *s1, const char *s2)
{
#if defined(__VXWORKS_OS__) || defined( __PSOS__)
  while ((*s1 != '\0') && (tolower (*s1) == tolower (*s2)))
    {
      s1++;
      s2++;
    }
  return (tolower (*s1) - tolower (*s2));
#elif defined(__PALMOS__) && (__PALMOS__ < 0x06000000)
  return StrCaselessCompare (s1, s2);
#elif defined(__PALMOS__) || (!defined WIN32 && !defined _WIN32_WCE)
  return strcasecmp (s1, s2);
#else
  return _stricmp (s1, s2);
#endif
}

int
osip_strncasecmp (const char *s1, const char *s2, size_t len)
{
#if defined(__VXWORKS_OS__) || defined( __PSOS__)
  if (len == 0)
    return 0;
  while ((len > 0) && (tolower (*s1) == tolower (*s2)))
    {
      len--;
      if ((len == 0) || (*s1 == '\0') || (*s2 == '\0'))
        break;
      s1++;
      s2++;
    }
  return tolower (*s1) - tolower (*s2);
#elif defined(__PALMOS__) && (__PALMOS__ < 0x06000000)
  return StrNCaselessCompare (s1, s2, len);
#elif defined(__PALMOS__) || (!defined WIN32 && !defined _WIN32_WCE)
  return strncasecmp (s1, s2, len);
#else
  return _strnicmp (s1, s2, len);
#endif
}
#endif

/* remove SPACE before and after the content */
int
osip_clrspace (char *word)
{
  char *pbeg;
  char *pend;
  size_t len;

  if (word == NULL)
    return -1;
  if (*word == '\0')
    return 0;
  len = strlen (word);

  pbeg = word;
  while ((' ' == *pbeg) || ('\r' == *pbeg) || ('\n' == *pbeg) || ('\t' == *pbeg))
    pbeg++;

  pend = word + len - 1;
  while ((' ' == *pend) || ('\r' == *pend) || ('\n' == *pend) || ('\t' == *pend))
    {
      pend--;
      if (pend < pbeg)
        {
          *word = '\0';
          return 0;
        }
    }

  /* Add terminating NULL only if we've cleared room for it */
  if (pend + 1 <= word + (len - 1))
    pend[1] = '\0';

  if (pbeg != word)
    memmove (word, pbeg, pend - pbeg + 2);

  return 0;
}

/* __osip_set_next_token:
   dest is the place where the value will be allocated
   buf is the string where the value is searched
   end_separator is the character that MUST be found at the end of the value
   next is the final location of the separator + 1

   the element MUST be found before any "\r" "\n" "\0" and
   end_separator

   return -1 on error
   return 1 on success
*/
int
__osip_set_next_token (char **dest, char *buf, int end_separator, char **next)
{
  char *sep;                    /* separator */

  *next = NULL;

  sep = buf;
  while ((*sep != end_separator) && (*sep != '\0') && (*sep != '\r')
         && (*sep != '\n'))
    sep++;
  if ((*sep == '\r') || (*sep == '\n'))
    {                           /* we should continue normally only if this is the separator asked! */
      if (*sep != end_separator)
        return -1;
    }
  if (*sep == '\0')
    return -1;                  /* value must not end with this separator! */
  if (sep == buf)
    return -1;                  /* empty value (or several space!) */

  *dest = osip_malloc (sep - (buf) + 1);
  osip_strncpy (*dest, buf, sep - buf);

  *next = sep + 1;              /* return the position right after the separator */
  return 0;
}

#if 0
/*  not yet done!!! :-)
 */
int
__osip_set_next_token_better (char **dest, char *buf, int end_separator,
                              int *forbidden_tab[], int size_tab, char **next)
{
  char *sep;                    /* separator */

  *next = NULL;

  sep = buf;
  while ((*sep != end_separator) && (*sep != '\0') && (*sep != '\r')
         && (*sep != '\n'))
    sep++;
  if ((*sep == '\r') && (*sep == '\n'))
    {                           /* we should continue normally only if this is the separator asked! */
      if (*sep != end_separator)
        return -1;
    }
  if (*sep == '\0')
    return -1;                  /* value must not end with this separator! */
  if (sep == buf)
    return -1;                  /* empty value (or several space!) */

  *dest = osip_malloc (sep - (buf) + 1);
  osip_strncpy (*dest, buf, sep - buf);

  *next = sep + 1;              /* return the position right after the separator */
  return 1;
}
#endif

/* in quoted-string, many characters can be escaped...   */
/* __osip_quote_find returns the next quote that is not escaped */
char *
__osip_quote_find (const char *qstring)
{
  char *quote;

  quote = strchr (qstring, '"');
  if (quote == qstring)         /* the first char matches and is not escaped... */
    return quote;

  if (quote == NULL)
    return NULL;                /* no quote at all... */

  /* this is now the nasty cases where '"' is escaped
     '" jonathan ros \\\""'
     |                  |
     '" jonathan ros \\"'
     |                |
     '" jonathan ros \""'
     |                |
     we must count the number of preceeding '\' */
  {
    int i = 1;

    for (;;)
      {
        if (0 == strncmp (quote - i, "\\", 1))
          i++;
        else
          {
            if (i % 2 == 1)     /* the '"' was not escaped */
              return quote;

            /* else continue with the next '"' */
            quote = strchr (quote + 1, '"');
            if (quote == NULL)
              return NULL;
            i = 1;
          }
        if (quote - i == qstring - 1)
          /* example: "\"john"  */
          /* example: "\\"jack" */
          {
            /* special case where the string start with '\' */
            if (*qstring == '\\')
              i++;              /* an escape char was not counted */
            if (i % 2 == 0)     /* the '"' was not escaped */
              return quote;
            else
              {                 /* else continue with the next '"' */
                qstring = quote + 1;    /* reset qstring because
                                           (*quote+1) may be also == to '\\' */
                quote = strchr (quote + 1, '"');
                if (quote == NULL)
                  return NULL;
                i = 1;
              }

          }
      }
    return NULL;
  }
}

char *
osip_enquote (const char *s)
{
  char *rtn;
  char *t;

  t = rtn = osip_malloc (strlen (s) * 2 + 3);
  *t++ = '"';
  for (; *s != '\0'; s++)
    {
      switch (*s)
        {
          case '"':
          case '\\':
          case 0x7f:
            *t++ = '\\';
            *t++ = *s;
            break;
          case '\n':
          case '\r':
            *t++ = ' ';
            break;