Moved pjsua framework to pjsua-lib

git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@238 74dad513-b988-da41-8d7b-12977e46ad98

6 files changed, 4287 insertions, 0 deletions

diff --git a/pjsip/src/pjsua-lib/getopt.c b/pjsip/src/pjsua-lib/getopt.c
new file mode 100644
index 00000000..5f39edda
--- /dev/null
+++ b/pjsip/src/pjsua-lib/getopt.c
@@ -0,0 +1,751 @@
+/* $Id$ */
+/* 
+ * Copyright (C) 2003-2006 Benny Prijono <benny@prijono.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+
+/* 
+ * getopt entry points
+ *
+ * modified by Mike Borella <mike_borella@mw.3com.com>
+ *
+ * $Id$
+ */
+
+#include <pjsua-lib/getopt.h>
+#include <pj/string.h>
+
+/* Internal only.  Users should not call this directly.  */
+static
+int _getopt_internal (int argc, char *const *argv,
+		      const char *shortopts,
+		      const struct option *longopts, int *longind,
+		      int long_only);
+
+/* getopt_long and getopt_long_only entry points for GNU getopt.
+   Copyright (C) 1987,88,89,90,91,92,93,94,96,97 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+
+/* Comment out all this code if we are using the GNU C Library, and are not
+   actually compiling the library itself.  This code is part of the GNU C
+   Library, but also included in many other GNU distributions.  Compiling
+   and linking in this code is a waste when using the GNU C library
+   (especially if it is a shared library).  Rather than having every GNU
+   program understand `configure --with-gnu-libc' and omit the object files,
+   it is simpler to just do this in the source for each such file.  */
+
+#   define GETOPT_INTERFACE_VERSION 2
+
+
+int
+getopt_long (int argc, char *const *argv, const char *options, 
+	     const struct option *long_options, int *opt_index)
+{
+  return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
+}
+
+/* Like getopt_long, but '-' as well as '--' can indicate a long option.
+   If an option that starts with '-' (not '--') doesn't match a long option,
+   but does match a short option, it is parsed as a short option
+   instead.  */
+ 
+int
+getopt (int argc, char * const * argv, const char * optstring)
+{
+  return _getopt_internal (argc, argv, optstring,
+			   (const struct option *) 0,
+			   (int *) 0,
+			   0);
+}
+
+
+#define _(msgid)	(msgid)
+
+/* This version of `getopt' appears to the caller like standard Unix `getopt'
+   but it behaves differently for the user, since it allows the user
+   to intersperse the options with the other arguments.
+
+   As `getopt' works, it permutes the elements of ARGV so that,
+   when it is done, all the options precede everything else.  Thus
+   all application programs are extended to handle flexible argument order.
+
+   Setting the environment variable POSIXLY_CORRECT disables permutation.
+   Then the behavior is completely standard.
+
+   GNU application programs can use a third alternative mode in which
+   they can distinguish the relative order of options and other arguments.  */
+
+/* For communication from `getopt' to the caller.
+   When `getopt' finds an option that takes an argument,
+   the argument value is returned here.
+   Also, when `ordering' is RETURN_IN_ORDER,
+   each non-option ARGV-element is returned here.  */
+
+char *optarg = NULL;
+
+/* Index in ARGV of the next element to be scanned.
+   This is used for communication to and from the caller
+   and for communication between successive calls to `getopt'.
+
+   On entry to `getopt', zero means this is the first call; initialize.
+
+   When `getopt' returns -1, this is the index of the first of the
+   non-option elements that the caller should itself scan.
+
+   Otherwise, `optind' communicates from one call to the next
+   how much of ARGV has been scanned so far.  */
+
+/* 1003.2 says this must be 1 before any call.  */
+int optind = 1;
+
+/* Formerly, initialization of getopt depended on optind==0, which
+   causes problems with re-calling getopt as programs generally don't
+   know that. */
+
+int __getopt_initialized = 0;
+
+/* The next char to be scanned in the option-element
+   in which the last option character we returned was found.
+   This allows us to pick up the scan where we left off.
+
+   If this is zero, or a null string, it means resume the scan
+   by advancing to the next ARGV-element.  */
+
+static char *nextchar;
+
+/* Set to an option character which was unrecognized.
+   This must be initialized on some systems to avoid linking in the
+   system's own getopt implementation.  */
+
+int optopt = '?';
+
+/* Describe how to deal with options that follow non-option ARGV-elements.
+
+   If the caller did not specify anything,
+   the default is REQUIRE_ORDER if the environment variable
+   POSIXLY_CORRECT is defined, PERMUTE otherwise.
+
+   REQUIRE_ORDER means don't recognize them as options;
+   stop option processing when the first non-option is seen.
+   This is what Unix does.
+   This mode of operation is selected by either setting the environment
+   variable POSIXLY_CORRECT, or using `+' as the first character
+   of the list of option characters.
+
+   PERMUTE is the default.  We permute the contents of ARGV as we scan,
+   so that eventually all the non-options are at the end.  This allows options
+   to be given in any order, even with programs that were not written to
+   expect this.
+
+   RETURN_IN_ORDER is an option available to programs that were written
+   to expect options and other ARGV-elements in any order and that care about
+   the ordering of the two.  We describe each non-option ARGV-element
+   as if it were the argument of an option with character code 1.
+   Using `-' as the first character of the list of option characters
+   selects this mode of operation.
+
+   The special argument `--' forces an end of option-scanning regardless
+   of the value of `ordering'.  In the case of RETURN_IN_ORDER, only
+   `--' can cause `getopt' to return -1 with `optind' != ARGC.  */
+
+static enum
+{
+  REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
+} ordering;
+
+/* Value of POSIXLY_CORRECT environment variable.  */
+static char *posixly_correct;
+
+static char *
+my_index (const char *str, int chr)
+{
+  while (*str)
+    {
+      if (*str == chr)
+	return (char *) str;
+      str++;
+    }
+  return 0;
+}
+
+
+/* Handle permutation of arguments.  */
+
+/* Describe the part of ARGV that contains non-options that have
+   been skipped.  `first_nonopt' is the index in ARGV of the first of them;
+   `last_nonopt' is the index after the last of them.  */
+
+static int first_nonopt;
+static int last_nonopt;
+
+#   define SWAP_FLAGS(ch1, ch2)
+
+/* Exchange two adjacent subsequences of ARGV.
+   One subsequence is elements [first_nonopt,last_nonopt)
+   which contains all the non-options that have been skipped so far.
+   The other is elements [last_nonopt,optind), which contains all
+   the options processed since those non-options were skipped.
+
+   `first_nonopt' and `last_nonopt' are relocated so that they describe
+   the new indices of the non-options in ARGV after they are moved.  */
+
+static void
+exchange (char **argv)
+{
+  int bottom = first_nonopt;
+  int middle = last_nonopt;
+  int top = optind;
+  char *tem;
+
+  /* Exchange the shorter segment with the far end of the longer segment.
+     That puts the shorter segment into the right place.
+     It leaves the longer segment in the right place overall,
+     but it consists of two parts that need to be swapped next.  */
+
+  while (top > middle && middle > bottom)
+    {
+      if (top - middle > middle - bottom)
+	{
+	  /* Bottom segment is the short one.  */
+	  int len = middle - bottom;
+	  register int i;
+
+	  /* Swap it with the top part of the top segment.  */
+	  for (i = 0; i < len; i++)
+	    {
+	      tem = argv[bottom + i];
+	      argv[bottom + i] = argv[top - (middle - bottom) + i];
+	      argv[top - (middle - bottom) + i] = tem;
+	      SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
+	    }
+	  /* Exclude the moved bottom segment from further swapping.  */
+	  top -= len;
+	}
+      else
+	{
+	  /* Top segment is the short one.  */
+	  int len = top - middle;
+	  register int i;
+
+	  /* Swap it with the bottom part of the bottom segment.  */
+	  for (i = 0; i < len; i++)
+	    {
+	      tem = argv[bottom + i];
+	      argv[bottom + i] = argv[middle + i];
+	      argv[middle + i] = tem;
+	      SWAP_FLAGS (bottom + i, middle + i);
+	    }
+	  /* Exclude the moved top segment from further swapping.  */
+	  bottom += len;
+	}
+    }
+
+  /* Update records for the slots the non-options now occupy.  */
+
+  first_nonopt += (optind - last_nonopt);
+  last_nonopt = optind;
+}
+
+/* Initialize the internal data when the first call is made.  */
+
+static const char *_getopt_initialize (int argc, char *const *argv, 
+				       const char *optstring)
+{
+    PJ_UNUSED_ARG(argc);
+    PJ_UNUSED_ARG(argv);
+
+  /* Start processing options with ARGV-element 1 (since ARGV-element 0
+     is the program name); the sequence of previously skipped
+     non-option ARGV-elements is empty.  */
+
+  first_nonopt = last_nonopt = optind;
+
+  nextchar = NULL;
+
+  //posixly_correct = getenv ("POSIXLY_CORRECT");
+  posixly_correct = NULL;
+
+  /* Determine how to handle the ordering of options and nonoptions.  */
+
+  if (optstring[0] == '-')
+    {
+      ordering = RETURN_IN_ORDER;
+      ++optstring;
+    }
+  else if (optstring[0] == '+')
+    {
+      ordering = REQUIRE_ORDER;
+      ++optstring;
+    }
+  else if (posixly_correct != NULL)
+    ordering = REQUIRE_ORDER;
+  else
+    ordering = PERMUTE;
+
+  return optstring;
+}
+
+/* Scan elements of ARGV (whose length is ARGC) for option characters
+   given in OPTSTRING.
+
+   If an element of ARGV starts with '-', and is not exactly "-" or "--",
+   then it is an option element.  The characters of this element
+   (aside from the initial '-') are option characters.  If `getopt'
+   is called repeatedly, it returns successively each of the option characters
+   from each of the option elements.
+
+   If `getopt' finds another option character, it returns that character,
+   updating `optind' and `nextchar' so that the next call to `getopt' can
+   resume the scan with the following option character or ARGV-element.
+
+   If there are no more option characters, `getopt' returns -1.
+   Then `optind' is the index in ARGV of the first ARGV-element
+   that is not an option.  (The ARGV-elements have been permuted
+   so that those that are not options now come last.)
+
+   OPTSTRING is a string containing the legitimate option characters.
+   If an option character is seen that is not listed in OPTSTRING,
+   return '?' after printing an error message.  If you set `opterr' to
+   zero, the error message is suppressed but we still return '?'.
+
+   If a char in OPTSTRING is followed by a colon, that means it wants an arg,
+   so the following text in the same ARGV-element, or the text of the following
+   ARGV-element, is returned in `optarg'.  Two colons mean an option that
+   wants an optional arg; if there is text in the current ARGV-element,
+   it is returned in `optarg', otherwise `optarg' is set to zero.
+
+   If OPTSTRING starts with `-' or `+', it requests different methods of
+   handling the non-option ARGV-elements.
+   See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
+
+   Long-named options begin with `--' instead of `-'.
+   Their names may be abbreviated as long as the abbreviation is unique
+   or is an exact match for some defined option.  If they have an
+   argument, it follows the option name in the same ARGV-element, separated
+   from the option name by a `=', or else the in next ARGV-element.
+   When `getopt' finds a long-named option, it returns 0 if that option's
+   `flag' field is nonzero, the value of the option's `val' field
+   if the `flag' field is zero.
+
+   The elements of ARGV aren't really const, because we permute them.
+   But we pretend they're const in the prototype to be compatible
+   with other systems.
+
+   LONGOPTS is a vector of `struct option' terminated by an
+   element containing a name which is zero.
+
+   LONGIND returns the index in LONGOPT of the long-named option found.
+   It is only valid when a long-named option has been found by the most
+   recent call.
+
+   If LONG_ONLY is nonzero, '-' as well as '--' can introduce
+   long-named options.  */
+
+static int
+_getopt_internal (int argc, char *const *argv, const char *optstring, 
+		  const struct option *longopts, int *longind, 
+		  int long_only)
+{
+  optarg = NULL;
+
+  if (optind == 0 || !__getopt_initialized)
+    {
+      if (optind == 0)
+	optind = 1;	/* Don't scan ARGV[0], the program name.  */
+      optstring = _getopt_initialize (argc, argv, optstring);
+      __getopt_initialized = 1;
+    }
+
+  /* Test whether ARGV[optind] points to a non-option argument.
+     Either it does not have option syntax, or there is an environment flag
+     from the shell indicating it is not an option.  The later information
+     is only used when the used in the GNU libc.  */
+#define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
+
+  if (nextchar == NULL || *nextchar == '\0')
+    {
+      /* Advance to the next ARGV-element.  */
+
+      /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
+	 moved back by the user (who may also have changed the arguments).  */
+      if (last_nonopt > optind)
+	last_nonopt = optind;
+      if (first_nonopt > optind)
+	first_nonopt = optind;
+
+      if (ordering == PERMUTE)
+	{
+	  /* If we have just processed some options following some non-options,
+	     exchange them so that the options come first.  */
+
+	  if (first_nonopt != last_nonopt && last_nonopt != optind)
+	    exchange ((char **) argv);
+	  else if (last_nonopt != optind)
+	    first_nonopt = optind;
+
+	  /* Skip any additional non-options
+	     and extend the range of non-options previously skipped.  */
+
+	  while (optind < argc && NONOPTION_P)
+	    optind++;
+	  last_nonopt = optind;
+	}
+
+      /* The special ARGV-element `--' means premature end of options.
+	 Skip it like a null option,
+	 then exchange with previous non-options as if it were an option,
+	 then skip everything else like a non-option.  */
+
+      if (optind != argc && !pj_ansi_strcmp(argv[optind], "--"))
+	{
+	  optind++;
+
+	  if (first_nonopt != last_nonopt && last_nonopt != optind)
+	    exchange ((char **) argv);
+	  else if (first_nonopt == last_nonopt)
+	    first_nonopt = optind;
+	  last_nonopt = argc;
+
+	  optind = argc;
+	}
+
+      /* If we have done all the ARGV-elements, stop the scan
+	 and back over any non-options that we skipped and permuted.  */
+
+      if (optind == argc)
+	{
+	  /* Set the next-arg-index to point at the non-options
+	     that we previously skipped, so the caller will digest them.  */
+	  if (first_nonopt != last_nonopt)
+	    optind = first_nonopt;
+	  return -1;
+	}
+
+      /* If we have come to a non-option and did not permute it,
+	 either stop the scan or describe it to the caller and pass it by.  */
+
+      if (NONOPTION_P)
+	{
+	  if (ordering == REQUIRE_ORDER)
+	    return -1;
+	  optarg = argv[optind++];
+	  return 1;
+	}
+
+      /* We have found another option-ARGV-element.
+	 Skip the initial punctuation.  */
+
+      nextchar = (argv[optind] + 1
+		  + (longopts != NULL && argv[optind][1] == '-'));
+    }
+
+  /* Decode the current option-ARGV-element.  */
+
+  /* Check whether the ARGV-element is a long option.
+
+     If long_only and the ARGV-element has the form "-f", where f is
+     a valid short option, don't consider it an abbreviated form of
+     a long option that starts with f.  Otherwise there would be no
+     way to give the -f short option.
+
+     On the other hand, if there's a long option "fubar" and
+     the ARGV-element is "-fu", do consider that an abbreviation of
+     the long option, just like "--fu", and not "-f" with arg "u".
+
+     This distinction seems to be the most useful approach.  */
+
+  if (longopts != NULL
+      && (argv[optind][1] == '-'
+	  || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
+    {
+      char *nameend;
+      const struct option *p;
+      const struct option *pfound = NULL;
+      int exact = 0;
+      int ambig = 0;
+      int indfound = -1;
+      int option_index;
+
+      for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
+	/* Do nothing.  */ ;
+
+      /* Test all long options for either exact match
+	 or abbreviated matches.  */
+      for (p = longopts, option_index = 0; p->name; p++, option_index++)
+	if (!strncmp (p->name, nextchar, nameend - nextchar))
+	  {
+	    if ((unsigned int) (nameend - nextchar)
+		== (unsigned int) strlen (p->name))
+	      {
+		/* Exact match found.  */
+		pfound = p;
+		indfound = option_index;
+		exact = 1;
+		break;
+	      }
+	    else if (pfound == NULL)
+	      {
+		/* First nonexact match found.  */
+		pfound = p;
+		indfound = option_index;
+	      }
+	    else
+	      /* Second or later nonexact match found.  */
+	      ambig = 1;
+	  }
+
+      if (ambig && !exact)
+	{
+	  nextchar += strlen (nextchar);
+	  optind++;
+	  optopt = 0;
+	  return '?';
+	}
+
+      if (pfound != NULL)
+	{
+	  option_index = indfound;
+	  optind++;
+	  if (*nameend)
+	    {
+	      /* Don't test has_arg with >, because some C compilers don't
+		 allow it to be used on enums.  */
+	      if (pfound->has_arg)
+		optarg = nameend + 1;
+	      else
+		{
+		  nextchar += strlen (nextchar);
+
+		  optopt = pfound->val;
+		  return '?';
+		}
+	    }
+	  else if (pfound->has_arg == 1)
+	    {
+	      if (optind < argc)
+		optarg = argv[optind++];
+	      else
+		{
+		  nextchar += strlen (nextchar);
+		  optopt = pfound->val;
+		  return optstring[0] == ':' ? ':' : '?';
+		}
+	    }
+	  nextchar += strlen (nextchar);
+	  if (longind != NULL)
+	    *longind = option_index;
+	  if (pfound->flag)
+	    {
+	      *(pfound->flag) = pfound->val;
+	      return 0;
+	    }
+	  return pfound->val;
+	}
+
+      /* Can't find it as a long option.  If this is not getopt_long_only,
+	 or the option starts with '--' or is not a valid short
+	 option, then it's an error.
+	 Otherwise interpret it as a short option.  */
+      if (!long_only || argv[optind][1] == '-'
+	  || my_index (optstring, *nextchar) == NULL)
+	{
+	  nextchar = (char *) "";
+	  optind++;
+	  optopt = 0;
+	  return '?';
+	}
+    }
+
+  /* Look at and handle the next short option-character.  */
+
+  {
+    char c = *nextchar++;
+    char *temp = my_index (optstring, c);
+
+    /* Increment `optind' when we start to process its last character.  */
+    if (*nextchar == '\0')
+      ++optind;
+
+    if (temp == NULL || c == ':')
+      {
+	optopt = c;
+	return '?';
+      }
+    /* Convenience. Treat POSIX -W foo same as long option --foo */
+    if (temp[0] == 'W' && temp[1] == ';')
+      {
+	char *nameend;
+	const struct option *p;
+	const struct option *pfound = NULL;
+	int exact = 0;
+	int ambig = 0;
+	int indfound = 0;
+	int option_index;
+
+	/* This is an option that requires an argument.  */
+	if (*nextchar != '\0')
+	  {
+	    optarg = nextchar;
+	    /* If we end this ARGV-element by taking the rest as an arg,
+	       we must advance to the next element now.  */
+	    optind++;
+	  }
+	else if (optind == argc)
+	  {
+	    optopt = c;
+	    if (optstring[0] == ':')
+	      c = ':';
+	    else
+	      c = '?';
+	    return c;
+	  }
+	else
+	  /* We already incremented `optind' once;
+	     increment it again when taking next ARGV-elt as argument.  */
+	  optarg = argv[optind++];
+
+	/* optarg is now the argument, see if it's in the
+	   table of longopts.  */
+
+	for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
+	  /* Do nothing.  */ ;
+
+	/* Test all long options for either exact match
+	   or abbreviated matches.  */
+	for (p = longopts, option_index = 0; p->name; p++, option_index++)
+	  if (!strncmp (p->name, nextchar, nameend - nextchar))
+	    {
+	      if ((unsigned int) (nameend - nextchar) == strlen (p->name))
+		{
+		  /* Exact match found.  */
+		  pfound = p;
+		  indfound = option_index;
+		  exact = 1;
+		  break;
+		}
+	      else if (pfound == NULL)
+		{
+		  /* First nonexact match found.  */
+		  pfound = p;
+		  indfound = option_index;
+		}
+	      else
+		/* Second or later nonexact match found.  */
+		ambig = 1;
+	    }
+	if (ambig && !exact)
+	  {
+	    nextchar += strlen (nextchar);
+	    optind++;
+	    return '?';
+	  }
+	if (pfound != NULL)
+	  {
+	    option_index = indfound;
+	    if (*nameend)
+	      {
+		/* Don't test has_arg with >, because some C compilers don't
+		   allow it to be used on enums.  */
+		if (pfound->has_arg)
+		  optarg = nameend + 1;
+		else
+		  {
+		    nextchar += strlen (nextchar);
+		    return '?';
+		  }
+	      }
+	    else if (pfound->has_arg == 1)
+	      {
+		if (optind < argc)
+		  optarg = argv[optind++];
+		else
+		  {
+		    nextchar += strlen (nextchar);
+		    return optstring[0] == ':' ? ':' : '?';
+		  }
+	      }
+	    nextchar += strlen (nextchar);
+	    if (longind != NULL)
+	      *longind = option_index;
+	    if (pfound->flag)
+	      {
+		*(pfound->flag) = pfound->val;
+		return 0;
+	      }
+	    return pfound->val;
+	  }
+	  nextchar = NULL;
+	  return 'W';	/* Let the application handle it.   */
+      }
+    if (temp[1] == ':')
+      {
+	if (temp[2] == ':')
+	  {
+	    /* This is an option that accepts an argument optionally.  */
+	    if (*nextchar != '\0')
+	      {
+		optarg = nextchar;
+		optind++;
+	      }
+	    else
+	      optarg = NULL;
+	    nextchar = NULL;
+	  }
+	else
+	  {
+	    /* This is an option that requires an argument.  */
+	    if (*nextchar != '\0')
+	      {
+		optarg = nextchar;
+		/* If we end this ARGV-element by taking the rest as an arg,
+		   we must advance to the next element now.  */
+		optind++;
+	      }
+	    else if (optind == argc)
+	      {
+		optopt = c;
+		if (optstring[0] == ':')
+		  c = ':';
+		else
+		  c = '?';
+	      }
+	    else
+	      /* We already incremented `optind' once;
+		 increment it again when taking next ARGV-elt as argument.  */
+	      optarg = argv[optind++];
+	    nextchar = NULL;
+	  }
+      }
+    return c;
+  }
+}
+
diff --git a/pjsip/src/pjsua-lib/pjsua_call.c b/pjsip/src/pjsua-lib/pjsua_call.c
new file mode 100644
index 00000000..157b2bb1
--- /dev/null
+++ b/pjsip/src/pjsua-lib/pjsua_call.c
@@ -0,0 +1,1090 @@
+/* $Id$ */
+/* 
+ * Copyright (C) 2003-2006 Benny Prijono <benny@prijono.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+#include <pjsua-lib/pjsua.h>
+#include <pj/log.h>
+
+
+/*
+ * pjsua_inv.c
+ *
+ * Invite session specific functionalities.
+ */
+
+#define THIS_FILE   "pjsua_inv.c"
+
+
+/**
+ * Make outgoing call.
+ */
+pj_status_t pjsua_make_call(int acc_index,
+			    const char *cstr_dest_uri,
+			    int *p_call_index)
+{
+    pj_str_t dest_uri;
+    pjsip_dialog *dlg;
+    pjmedia_sdp_session *offer;
+    pjsip_inv_session *inv;
+    int call_index = -1;
+    pjsip_tx_data *tdata;
+    pj_status_t status;
+
+    /* Convert cstr_dest_uri to dest_uri */
+    
+    dest_uri = pj_str((char*)cstr_dest_uri);
+
+    /* Find free call slot. */
+    for (call_index=0; call_index<pjsua.max_calls; ++call_index) {
+	if (pjsua.calls[call_index].inv == NULL)
+	    break;
+    }
+
+    if (call_index == pjsua.max_calls) {
+	PJ_LOG(3,(THIS_FILE, "Error: too many calls!"));
+	return PJ_ETOOMANY;
+    }
+
+    /* Create outgoing dialog: */
+
+    status = pjsip_dlg_create_uac( pjsip_ua_instance(), 
+				   &pjsua.acc[acc_index].local_uri,
+				   &pjsua.acc[acc_index].contact_uri, 
+				   &dest_uri, &dest_uri,
+				   &dlg);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Dialog creation failed", status);
+	return status;
+    }
+
+    /* Get media capability from media endpoint: */
+
+    status = pjmedia_endpt_create_sdp( pjsua.med_endpt, dlg->pool, 1, 
+				       &pjsua.calls[call_index].skinfo, 
+				       &offer);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "pjmedia unable to create SDP", status);
+	goto on_error;
+    }
+
+    /* Create the INVITE session: */
+
+    status = pjsip_inv_create_uac( dlg, offer, 0, &inv);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Invite session creation failed", status);
+	goto on_error;
+    }
+
+
+    /* Create and associate our data in the session. */
+
+    pjsua.calls[call_index].inv = inv;
+
+    dlg->mod_data[pjsua.mod.id] = &pjsua.calls[call_index];
+    inv->mod_data[pjsua.mod.id] = &pjsua.calls[call_index];
+
+
+    /* Set dialog Route-Set: */
+
+    if (!pj_list_empty(&pjsua.acc[acc_index].route_set))
+	pjsip_dlg_set_route_set(dlg, &pjsua.acc[acc_index].route_set);
+
+
+    /* Set credentials: */
+
+    pjsip_auth_clt_set_credentials( &dlg->auth_sess, pjsua.cred_count, 
+				    pjsua.cred_info);
+
+
+    /* Create initial INVITE: */
+
+    status = pjsip_inv_invite(inv, &tdata);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to create initial INVITE request", 
+		     status);
+	goto on_error;
+    }
+
+
+    /* Send initial INVITE: */
+
+    status = pjsip_inv_send_msg(inv, tdata, NULL);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to send initial INVITE request", 
+		     status);
+	goto on_error;
+    }
+
+
+    /* Done. */
+
+    ++pjsua.call_cnt;
+
+    if (p_call_index)
+	*p_call_index = call_index;
+
+    return PJ_SUCCESS;
+
+
+on_error:
+    PJ_TODO(DESTROY_DIALOG_ON_FAIL);
+    if (call_index != -1) {
+	pjsua.calls[call_index].inv = NULL;
+    }
+    return status;
+}
+
+
+/**
+ * Handle incoming INVITE request.
+ */
+pj_bool_t pjsua_call_on_incoming(pjsip_rx_data *rdata)
+{
+    pjsip_dialog *dlg = pjsip_rdata_get_dlg(rdata);
+    pjsip_transaction *tsx = pjsip_rdata_get_tsx(rdata);
+    pjsip_msg *msg = rdata->msg_info.msg;
+    pjsip_tx_data *response = NULL;
+    unsigned options = 0;
+    pjsip_inv_session *inv;
+    int acc_index;
+    int call_index = -1;
+    pjmedia_sdp_session *answer;
+    pj_status_t status;
+
+    /* Don't want to handle anything but INVITE */
+    if (msg->line.req.method.id != PJSIP_INVITE_METHOD)
+	return PJ_FALSE;
+
+    /* Don't want to handle anything that's already associated with
+     * existing dialog or transaction.
+     */
+    if (dlg || tsx)
+	return PJ_FALSE;
+
+
+    /* Verify that we can handle the request. */
+    status = pjsip_inv_verify_request(rdata, &options, NULL, NULL,
+				      pjsua.endpt, &response);
+    if (status != PJ_SUCCESS) {
+
+	/*
+	 * No we can't handle the incoming INVITE request.
+	 */
+
+	if (response) {
+	    pjsip_response_addr res_addr;
+
+	    pjsip_get_response_addr(response->pool, rdata, &res_addr);
+	    pjsip_endpt_send_response(pjsua.endpt, &res_addr, response, 
+				      NULL, NULL);
+
+	} else {
+
+	    /* Respond with 500 (Internal Server Error) */
+	    pjsip_endpt_respond_stateless(pjsua.endpt, rdata, 500, NULL,
+					  NULL, NULL);
+	}
+
+	return PJ_TRUE;
+    } 
+
+
+    /*
+     * Yes we can handle the incoming INVITE request.
+     */
+
+    /* Find free call slot. */
+    for (call_index=0; call_index < pjsua.max_calls; ++call_index) {
+	if (pjsua.calls[call_index].inv == NULL)
+	    break;
+    }
+
+    if (call_index == PJSUA_MAX_CALLS) {
+	pjsip_endpt_respond_stateless(pjsua.endpt, rdata, 
+				      PJSIP_SC_BUSY_HERE, NULL,
+				      NULL, NULL);
+	return PJ_TRUE;
+    }
+
+
+    /* Get media capability from media endpoint: */
+
+    status = pjmedia_endpt_create_sdp( pjsua.med_endpt, rdata->tp_info.pool, 1,
+				       &pjsua.calls[call_index].skinfo, 
+				       &answer );
+    if (status != PJ_SUCCESS) {
+	pjsip_endpt_respond_stateless(pjsua.endpt, rdata, 500, NULL,
+				      NULL, NULL);
+
+	return PJ_TRUE;
+    }
+
+    /* TODO: 
+     *
+     * Get which account is most likely to be associated with this incoming
+     * call. We need the account to find which contact URI to put for
+     * the call.
+     */
+    acc_index = 0;
+
+    /* Create dialog: */
+
+    status = pjsip_dlg_create_uas( pjsip_ua_instance(), rdata,
+				   &pjsua.acc[acc_index].contact_uri, 
+				   &dlg);
+    if (status != PJ_SUCCESS) {
+	pjsip_endpt_respond_stateless(pjsua.endpt, rdata, 500, NULL,
+				      NULL, NULL);
+
+	return PJ_TRUE;
+    }
+
+
+    /* Create invite session: */
+
+    status = pjsip_inv_create_uas( dlg, rdata, answer, 0, &inv);
+    if (status != PJ_SUCCESS) {
+
+	pjsip_dlg_respond(dlg, rdata, 500, NULL);
+
+	// TODO: Need to delete dialog
+	return PJ_TRUE;
+    }
+
+
+    /* Create and attach pjsua data to the dialog: */
+
+    pjsua.calls[call_index].inv = inv;
+
+    dlg->mod_data[pjsua.mod.id] = &pjsua.calls[call_index];
+    inv->mod_data[pjsua.mod.id] = &pjsua.calls[call_index];
+
+
+    /* Must answer with some response to initial INVITE.
+     * If auto-answer flag is set, send 200 straight away, otherwise send 100.
+     */
+    
+    status = pjsip_inv_initial_answer(inv, rdata, 
+				      (pjsua.auto_answer ? 200 : 100), 
+				      NULL, NULL, &response);
+    if (status != PJ_SUCCESS) {
+	
+	pjsua_perror(THIS_FILE, "Unable to create 100 response", status);
+
+	pjsip_dlg_respond(dlg, rdata, 500, NULL);
+
+	// TODO: Need to delete dialog
+
+    } else {
+	status = pjsip_inv_send_msg(inv, response, NULL);
+	if (status != PJ_SUCCESS)
+	    pjsua_perror(THIS_FILE, "Unable to send 100 response", status);
+    }
+
+    if (pjsua.auto_answer < 200) {
+	PJ_LOG(3,(THIS_FILE,
+		  "\nIncoming call!!\n"
+		  "From: %.*s\n"
+		  "To:   %.*s\n"
+		  "(press 'a' to answer, 'h' to decline)",
+		  (int)dlg->remote.info_str.slen,
+		  dlg->remote.info_str.ptr,
+		  (int)dlg->local.info_str.slen,
+		  dlg->local.info_str.ptr));
+    } else {
+	PJ_LOG(3,(THIS_FILE,
+		  "Call From:%.*s To:%.*s was answered with %d (%s)",
+		  (int)dlg->remote.info_str.slen,
+		  dlg->remote.info_str.ptr,
+		  (int)dlg->local.info_str.slen,
+		  dlg->local.info_str.ptr,
+		  pjsua.auto_answer,
+		  pjsip_get_status_text(pjsua.auto_answer)->ptr ));
+    }
+
+    ++pjsua.call_cnt;
+
+    /* This INVITE request has been handled. */
+    return PJ_TRUE;
+}
+
+
+/*
+ * This callback receives notification from invite session when the
+ * session state has changed.
+ */
+static void pjsua_call_on_state_changed(pjsip_inv_session *inv, 
+					pjsip_event *e)
+{
+    pjsua_call *call = inv->dlg->mod_data[pjsua.mod.id];
+
+    /* If this is an outgoing INVITE that was created because of
+     * REFER/transfer, send NOTIFY to transferer.
+     */
+    if (call && call->xfer_sub && e->type==PJSIP_EVENT_TSX_STATE)  {
+	int st_code = -1;
+	pjsip_evsub_state ev_state = PJSIP_EVSUB_STATE_ACTIVE;
+	
+
+	switch (call->inv->state) {
+	case PJSIP_INV_STATE_NULL:
+	case PJSIP_INV_STATE_CALLING:
+	    /* Do nothing */
+	    break;
+
+	case PJSIP_INV_STATE_EARLY:
+	case PJSIP_INV_STATE_CONNECTING:
+	    st_code = e->body.tsx_state.tsx->status_code;
+	    ev_state = PJSIP_EVSUB_STATE_ACTIVE;
+	    break;
+
+	case PJSIP_INV_STATE_CONFIRMED:
+	    /* When state is confirmed, send the final 200/OK and terminate
+	     * subscription.
+	     */
+	    st_code = e->body.tsx_state.tsx->status_code;
+	    ev_state = PJSIP_EVSUB_STATE_TERMINATED;
+	    break;
+
+	case PJSIP_INV_STATE_DISCONNECTED:
+	    st_code = e->body.tsx_state.tsx->status_code;
+	    ev_state = PJSIP_EVSUB_STATE_TERMINATED;
+	    break;
+	}
+
+	if (st_code != -1) {
+	    pjsip_tx_data *tdata;
+	    pj_status_t status;
+
+	    status = pjsip_xfer_notify( call->xfer_sub,
+					ev_state, st_code,
+					NULL, &tdata);
+	    if (status != PJ_SUCCESS) {
+		pjsua_perror(THIS_FILE, "Unable to create NOTIFY", status);
+	    } else {
+		status = pjsip_xfer_send_request(call->xfer_sub, tdata);
+		if (status != PJ_SUCCESS) {
+		    pjsua_perror(THIS_FILE, "Unable to send NOTIFY", status);
+		}
+	    }
+	}
+    }
+
+
+    pjsua_ui_inv_on_state_changed(call->index, e);
+
+    /* call->inv may be NULL now */
+
+    /* Destroy media session when invite session is disconnected. */
+    if (inv->state == PJSIP_INV_STATE_DISCONNECTED) {
+
+	pj_assert(call != NULL);
+
+	if (call && call->session) {
+	    pjmedia_conf_remove_port(pjsua.mconf, call->conf_slot);
+	    pjmedia_session_destroy(call->session);
+	    call->session = NULL;
+
+	    PJ_LOG(3,(THIS_FILE,"Media session is destroyed"));
+	}
+
+	call->inv = NULL;
+	--pjsua.call_cnt;
+    }
+}
+
+
+/*
+ * Callback called by event framework when the xfer subscription state
+ * has changed.
+ */
+static void xfer_on_evsub_state( pjsip_evsub *sub, pjsip_event *event)
+{
+    
+    PJ_UNUSED_ARG(event);
+
+    /*
+     * We're only interested when subscription is terminated, to 
+     * clear the xfer_sub member of the inv_data.
+     */
+    if (pjsip_evsub_get_state(sub) == PJSIP_EVSUB_STATE_TERMINATED) {
+	pjsua_call *call;
+
+	call = pjsip_evsub_get_mod_data(sub, pjsua.mod.id);
+	if (!call)
+	    return;
+
+	pjsip_evsub_set_mod_data(sub, pjsua.mod.id, NULL);
+	call->xfer_sub = NULL;
+
+	PJ_LOG(3,(THIS_FILE, "Xfer subscription terminated"));
+    }
+}
+
+
+/*
+ * Follow transfer (REFER) request.
+ */
+static void on_call_transfered( pjsip_inv_session *inv,
+			        pjsip_rx_data *rdata )
+{
+    pj_status_t status;
+    pjsip_tx_data *tdata;
+    pjsua_call *existing_call;
+    int new_call;
+    const pj_str_t str_refer_to = { "Refer-To", 8};
+    pjsip_generic_string_hdr *refer_to;
+    char *uri;
+    struct pjsip_evsub_user xfer_cb;
+    pjsip_evsub *sub;
+
+    existing_call = inv->dlg->mod_data[pjsua.mod.id];
+
+    /* Find the Refer-To header */
+    refer_to = (pjsip_generic_string_hdr*)
+	pjsip_msg_find_hdr_by_name(rdata->msg_info.msg, &str_refer_to, NULL);
+
+    if (refer_to == NULL) {
+	/* Invalid Request.
+	 * No Refer-To header!
+	 */
+	PJ_LOG(4,(THIS_FILE, "Received REFER without Refer-To header!"));
+	pjsip_dlg_respond( inv->dlg, rdata, 400, NULL);
+	return;
+    }
+
+    PJ_LOG(3,(THIS_FILE, "Call to %.*s is being transfered to %.*s",
+	      (int)inv->dlg->remote.info_str.slen,
+	      inv->dlg->remote.info_str.ptr,
+	      (int)refer_to->hvalue.slen, 
+	      refer_to->hvalue.ptr));
+
+    /* Init callback */
+    pj_memset(&xfer_cb, 0, sizeof(xfer_cb));
+    xfer_cb.on_evsub_state = &xfer_on_evsub_state;
+
+    /* Create transferee event subscription */
+    status = pjsip_xfer_create_uas( inv->dlg, &xfer_cb, rdata, &sub);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to create xfer uas", status);
+	pjsip_dlg_respond( inv->dlg, rdata, 500, NULL);
+	return;
+    }
+
+    /* Accept the REFER request, send 200 (OK). */
+    pjsip_xfer_accept(sub, rdata, 200, NULL);
+
+    /* Create initial NOTIFY request */
+    status = pjsip_xfer_notify( sub, PJSIP_EVSUB_STATE_ACTIVE,
+				100, NULL, &tdata);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to create NOTIFY to REFER", status);
+	return;
+    }
+
+    /* Send initial NOTIFY request */
+    status = pjsip_xfer_send_request( sub, tdata);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to send NOTIFY to REFER", status);
+	return;
+    }
+
+    /* We're cheating here.
+     * We need to get a null terminated string from a pj_str_t.
+     * So grab the pointer from the hvalue and NULL terminate it, knowing
+     * that the NULL position will be occupied by a newline. 
+     */
+    uri = refer_to->hvalue.ptr;
+    uri[refer_to->hvalue.slen] = '\0';
+
+    /* Now make the outgoing call. */
+    status = pjsua_make_call(existing_call->acc_index, uri, &new_call);
+    if (status != PJ_SUCCESS) {
+
+	/* Notify xferer about the error */
+	status = pjsip_xfer_notify(sub, PJSIP_EVSUB_STATE_TERMINATED,
+				   500, NULL, &tdata);
+	if (status != PJ_SUCCESS) {
+	    pjsua_perror(THIS_FILE, "Unable to create NOTIFY to REFER", 
+			  status);
+	    return;
+	}
+	status = pjsip_xfer_send_request(sub, tdata);
+	if (status != PJ_SUCCESS) {
+	    pjsua_perror(THIS_FILE, "Unable to send NOTIFY to REFER", 
+			  status);
+	    return;
+	}
+	return;
+    }
+
+    /* Put the server subscription in inv_data.
+     * Subsequent state changed in pjsua_inv_on_state_changed() will be
+     * reported back to the server subscription.
+     */
+    pjsua.calls[new_call].xfer_sub = sub;
+
+    /* Put the invite_data in the subscription. */
+    pjsip_evsub_set_mod_data(sub, pjsua.mod.id, &pjsua.calls[new_call]);
+}
+
+
+/*
+ * This callback is called when transaction state has changed in INVITE
+ * session. We use this to trap incoming REFER request.
+ */
+static void pjsua_call_on_tsx_state_changed(pjsip_inv_session *inv,
+					    pjsip_transaction *tsx,
+					    pjsip_event *e)
+{
+    pjsua_call *call = inv->dlg->mod_data[pjsua.mod.id];
+
+    if (tsx->role==PJSIP_ROLE_UAS &&
+	tsx->state==PJSIP_TSX_STATE_TRYING &&
+	pjsip_method_cmp(&tsx->method, &pjsip_refer_method)==0)
+    {
+	/*
+	 * Incoming REFER request.
+	 */
+	on_call_transfered(call->inv, e->body.tsx_state.src.rdata);
+    }
+}
+
+
+/*
+ * This callback is called by invite session framework when UAC session
+ * has forked.
+ */
+static void pjsua_call_on_forked( pjsip_inv_session *inv, 
+				  pjsip_event *e)
+{
+    PJ_UNUSED_ARG(inv);
+    PJ_UNUSED_ARG(e);
+
+    PJ_TODO(HANDLE_FORKED_DIALOG);
+}
+
+
+/*
+ * Create inactive SDP for call hold.
+ */
+static pj_status_t create_inactive_sdp(pjsua_call *call,
+				       pjmedia_sdp_session **p_answer)
+{
+    pj_status_t status;
+    pjmedia_sdp_conn *conn;
+    pjmedia_sdp_attr *attr;
+    pjmedia_sdp_session *sdp;
+
+    /* Create new offer */
+    status = pjmedia_endpt_create_sdp(pjsua.med_endpt, pjsua.pool, 1,
+				      &call->skinfo, &sdp);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to create local SDP", status);
+	return status;
+    }
+
+    /* Get SDP media connection line */
+    conn = sdp->media[0]->conn;
+    if (!conn)
+	conn = sdp->conn;
+
+    /* Modify address */
+    conn->addr = pj_str("0.0.0.0");
+
+    /* Remove existing directions attributes */
+    pjmedia_sdp_media_remove_all_attr(sdp->media[0], "sendrecv");
+    pjmedia_sdp_media_remove_all_attr(sdp->media[0], "sendonly");
+    pjmedia_sdp_media_remove_all_attr(sdp->media[0], "recvonly");
+    pjmedia_sdp_media_remove_all_attr(sdp->media[0], "inactive");
+
+    /* Add inactive attribute */
+    attr = pjmedia_sdp_attr_create(pjsua.pool, "inactive", NULL);
+    pjmedia_sdp_media_add_attr(sdp->media[0], attr);
+
+    *p_answer = sdp;
+
+    return status;
+}
+
+/*
+ * Called when session received new offer.
+ */
+static void pjsua_call_on_rx_offer(pjsip_inv_session *inv,
+				   const pjmedia_sdp_session *offer)
+{
+    pjsua_call *call;
+    pjmedia_sdp_conn *conn;
+    pjmedia_sdp_session *answer;
+    pj_bool_t is_remote_active;
+    pj_status_t status;
+
+    call = inv->dlg->mod_data[pjsua.mod.id];
+
+    /*
+     * See if remote is offering active media (i.e. not on-hold)
+     */
+    is_remote_active = PJ_TRUE;
+
+    conn = offer->media[0]->conn;
+    if (!conn)
+	conn = offer->conn;
+
+    if (pj_strcmp2(&conn->addr, "0.0.0.0")==0 ||
+	pj_strcmp2(&conn->addr, "0")==0)
+    {
+	is_remote_active = PJ_FALSE;
+
+    } 
+    else if (pjmedia_sdp_media_find_attr2(offer->media[0], "inactive", NULL))
+    {
+	is_remote_active = PJ_FALSE;
+    }
+
+    PJ_LOG(4,(THIS_FILE, "Received SDP offer, remote media is %s",
+	      (is_remote_active ? "active" : "inactive")));
+
+    /* Supply candidate answer */
+    if (is_remote_active) {
+	status = pjmedia_endpt_create_sdp( pjsua.med_endpt, call->inv->pool, 1,
+					   &call->skinfo, &answer);
+    } else {
+	status = create_inactive_sdp( call, &answer );
+    }
+
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to create local SDP", status);
+	return;
+    }
+
+    status = pjsip_inv_set_sdp_answer(call->inv, answer);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to set answer", status);
+	return;
+    }
+
+}
+
+
+/*
+ * Callback to be called when SDP offer/answer negotiation has just completed
+ * in the session. This function will start/update media if negotiation
+ * has succeeded.
+ */
+static void pjsua_call_on_media_update(pjsip_inv_session *inv,
+				       pj_status_t status)
+{
+    pjsua_call *call;
+    const pjmedia_sdp_session *local_sdp;
+    const pjmedia_sdp_session *remote_sdp;
+    pjmedia_port *media_port;
+    pj_str_t port_name;
+    char tmp[PJSIP_MAX_URL_SIZE];
+
+    call = inv->dlg->mod_data[pjsua.mod.id];
+
+    if (status != PJ_SUCCESS) {
+
+	pjsua_perror(THIS_FILE, "SDP negotiation has failed", status);
+	return;
+
+    }
+
+    /* Destroy existing media session, if any. */
+
+    if (call && call->session) {
+	pjmedia_conf_remove_port(pjsua.mconf, call->conf_slot);
+	pjmedia_session_destroy(call->session);
+	call->session = NULL;
+    }
+
+    /* Get local and remote SDP */
+
+    status = pjmedia_sdp_neg_get_active_local(call->inv->neg, &local_sdp);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, 
+		     "Unable to retrieve currently active local SDP", 
+		     status);
+	return;
+    }
+
+
+    status = pjmedia_sdp_neg_get_active_remote(call->inv->neg, &remote_sdp);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, 
+		     "Unable to retrieve currently active remote SDP", 
+		     status);
+	return;
+    }
+
+    /* Create new media session. 
+     * The media session is active immediately.
+     */
+    if (pjsua.null_audio)
+	return;
+    
+    status = pjmedia_session_create( pjsua.med_endpt, 1, 
+				     &call->skinfo,
+				     local_sdp, remote_sdp, 
+				     call,
+				     &call->session );
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to create media session", 
+		     status);
+	return;
+    }
+
+
+    /* Get the port interface of the first stream in the session.
+     * We need the port interface to add to the conference bridge.
+     */
+    pjmedia_session_get_port(call->session, 0, &media_port);
+
+
+    /*
+     * Add the call to conference bridge.
+     */
+    port_name.ptr = tmp;
+    port_name.slen = pjsip_uri_print(PJSIP_URI_IN_REQ_URI,
+				     call->inv->dlg->remote.info->uri,
+				     tmp, sizeof(tmp));
+    if (port_name.slen < 1) {
+	port_name = pj_str("call");
+    }
+    status = pjmedia_conf_add_port( pjsua.mconf, call->inv->pool,
+				    media_port, 
+				    &port_name,
+				    &call->conf_slot);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to create conference slot", 
+		     status);
+	pjmedia_session_destroy(call->session);
+	call->session = NULL;
+	return;
+    }
+
+    /* If auto-play is configured, connect the call to the file player 
+     * port 
+     */
+    if (pjsua.auto_play && pjsua.wav_file && 
+	call->inv->role == PJSIP_ROLE_UAS) 
+    {
+
+	pjmedia_conf_connect_port( pjsua.mconf, pjsua.wav_slot, 
+				   call->conf_slot);
+
+    } else if (pjsua.auto_loop && call->inv->role == PJSIP_ROLE_UAS) {
+
+	pjmedia_conf_connect_port( pjsua.mconf, call->conf_slot, 
+				   call->conf_slot);
+
+    } else if (pjsua.auto_conf) {
+
+	int i;
+
+	pjmedia_conf_connect_port( pjsua.mconf, 0, call->conf_slot);
+	pjmedia_conf_connect_port( pjsua.mconf, call->conf_slot, 0);
+
+	for (i=0; i < pjsua.max_calls; ++i) {
+
+	    if (!pjsua.calls[i].session)
+		continue;
+
+	    pjmedia_conf_connect_port( pjsua.mconf, call->conf_slot, 
+				       pjsua.calls[i].conf_slot);
+	    pjmedia_conf_connect_port( pjsua.mconf, pjsua.calls[i].conf_slot,
+				       call->conf_slot);
+	}
+
+    } else {
+
+	/* Connect new call to the sound device port (port zero) in the
+	 * main conference bridge.
+	 */
+	pjmedia_conf_connect_port( pjsua.mconf, 0, call->conf_slot);
+	pjmedia_conf_connect_port( pjsua.mconf, call->conf_slot, 0);
+    }
+
+
+    /* Done. */
+    {
+	struct pjmedia_session_info sess_info;
+	char info[80];
+	int info_len = 0;
+	unsigned i;
+
+	pjmedia_session_get_info(call->session, &sess_info);
+	for (i=0; i<sess_info.stream_cnt; ++i) {
+	    int len;
+	    const char *dir;
+	    pjmedia_stream_info *strm_info = &sess_info.stream_info[i];
+
+	    switch (strm_info->dir) {
+	    case PJMEDIA_DIR_NONE:
+		dir = "inactive";
+		break;
+	    case PJMEDIA_DIR_ENCODING:
+		dir = "sendonly";
+		break;
+	    case PJMEDIA_DIR_DECODING:
+		dir = "recvonly";
+		break;
+	    case PJMEDIA_DIR_ENCODING_DECODING:
+		dir = "sendrecv";
+		break;
+	    default:
+		dir = "unknown";
+		break;
+	    }
+	    len = pj_ansi_sprintf( info+info_len,
+				   ", stream #%d: %.*s (%s)", i,
+				   (int)strm_info->fmt.encoding_name.slen,
+				   (int)strm_info->fmt.encoding_name.ptr,
+				   dir);
+	    if (len > 0)
+		info_len += len;
+	}
+	PJ_LOG(3,(THIS_FILE,"Media started%s", info));
+    }
+}
+
+
+/*
+ * Hangup call.
+ */
+void pjsua_call_hangup(int call_index, int code)
+{
+    pjsua_call *call;
+    pj_status_t status;
+    pjsip_tx_data *tdata;
+
+
+    call = &pjsua.calls[call_index];
+
+    if (!call->inv) {
+	PJ_LOG(3,(THIS_FILE,"Call has been disconnected"));
+	return;
+    }
+
+    status = pjsip_inv_end_session(call->inv, code, NULL, &tdata);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, 
+		     "Failed to create end session message", 
+		     status);
+	return;
+    }
+
+    /* pjsip_inv_end_session may return PJ_SUCCESS with NULL 
+     * as p_tdata when INVITE transaction has not been answered
+     * with any provisional responses.
+     */
+    if (tdata == NULL)
+	return;
+
+    status = pjsip_inv_send_msg(call->inv, tdata, NULL);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, 
+		     "Failed to send end session message", 
+		     status);
+	return;
+    }
+}
+
+
+/*
+ * Put call on-Hold.
+ */
+void pjsua_call_set_hold(int call_index)
+{
+    pjmedia_sdp_session *sdp;
+    pjsua_call *call;
+    pjsip_tx_data *tdata;
+    pj_status_t status;
+
+    call = &pjsua.calls[call_index];
+    
+    if (!call->inv) {
+	PJ_LOG(3,(THIS_FILE,"Call has been disconnected"));
+	return;
+    }
+
+    if (call->inv->state != PJSIP_INV_STATE_CONFIRMED) {
+	PJ_LOG(3,(THIS_FILE, "Can not hold call that is not confirmed"));
+	return;
+    }
+
+    status = create_inactive_sdp(call, &sdp);
+    if (status != PJ_SUCCESS)
+	return;
+
+    /* Send re-INVITE with new offer */
+    status = pjsip_inv_reinvite( call->inv, NULL, sdp, &tdata);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to create re-INVITE", status);
+	return;
+    }
+
+    status = pjsip_inv_send_msg( call->inv, tdata, NULL);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to send re-INVITE", status);
+	return;
+    }
+}
+
+
+/*
+ * re-INVITE.
+ */
+void pjsua_call_reinvite(int call_index)
+{
+    pjmedia_sdp_session *sdp;
+    pjsip_tx_data *tdata;
+    pjsua_call *call;
+    pj_status_t status;
+
+    call = &pjsua.calls[call_index];
+
+    if (!call->inv) {
+	PJ_LOG(3,(THIS_FILE,"Call has been disconnected"));
+	return;
+    }
+
+
+    if (call->inv->state != PJSIP_INV_STATE_CONFIRMED) {
+	PJ_LOG(3,(THIS_FILE, "Can not re-INVITE call that is not confirmed"));
+	return;
+    }
+
+    /* Create SDP */
+    status = pjmedia_endpt_create_sdp( pjsua.med_endpt, call->inv->pool, 1,
+				       &call->skinfo, &sdp);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to get SDP from media endpoint", 
+		     status);
+	return;
+    }
+
+    /* Send re-INVITE with new offer */
+    status = pjsip_inv_reinvite( call->inv, NULL, sdp, &tdata);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to create re-INVITE", status);
+	return;
+    }
+
+    status = pjsip_inv_send_msg( call->inv, tdata, NULL);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to send re-INVITE", status);
+	return;
+    }
+}
+
+
+/*
+ * Transfer call.
+ */
+void pjsua_call_xfer(int call_index, const char *dest)
+{
+    pjsip_evsub *sub;
+    pjsip_tx_data *tdata;
+    pjsua_call *call;
+    pj_str_t tmp;
+    pj_status_t status;
+
+    
+    call = &pjsua.calls[call_index];
+
+    if (!call->inv) {
+	PJ_LOG(3,(THIS_FILE,"Call has been disconnected"));
+	return;
+    }
+   
+    /* Create xfer client subscription.
+     * We're not interested in knowing the transfer result, so we
+     * put NULL as the callback.
+     */
+    status = pjsip_xfer_create_uac(call->inv->dlg, NULL, &sub);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to create xfer", status);
+	return;
+    }
+
+    /*
+     * Create REFER request.
+     */
+    status = pjsip_xfer_initiate(sub, pj_cstr(&tmp, dest), &tdata);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to create REFER request", status);
+	return;
+    }
+
+    /* Send. */
+    status = pjsip_xfer_send_request(sub, tdata);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to send REFER request", status);
+	return;
+    }
+
+    /* For simplicity (that's what this program is intended to be!), 
+     * leave the original invite session as it is. More advanced application
+     * may want to hold the INVITE, or terminate the invite, or whatever.
+     */
+}
+
+
+/*
+ * Terminate all calls.
+ */
+void pjsua_inv_shutdown()
+{
+    int i;
+
+    for (i=0; i<pjsua.max_calls; ++i) {
+	pjsip_tx_data *tdata;
+	pjsua_call *call;
+
+	if (pjsua.calls[i].inv == NULL)
+	    continue;
+
+	call = &pjsua.calls[i];
+
+	if (pjsip_inv_end_session(call->inv, 410, NULL, &tdata)==0) {
+	    if (tdata)
+		pjsip_inv_send_msg(call->inv, tdata, NULL);
+	}
+    }
+}
+
+
+pj_status_t pjsua_call_init(void)
+{
+    /* Initialize invite session callback. */
+    pjsip_inv_callback inv_cb;
+    pj_status_t status;
+
+    pj_memset(&inv_cb, 0, sizeof(inv_cb));
+    inv_cb.on_state_changed = &pjsua_call_on_state_changed;
+    inv_cb.on_new_session = &pjsua_call_on_forked;
+    inv_cb.on_media_update = &pjsua_call_on_media_update;
+    inv_cb.on_rx_offer = &pjsua_call_on_rx_offer;
+    inv_cb.on_tsx_state_changed = &pjsua_call_on_tsx_state_changed;
+
+
+    /* Initialize invite session module: */
+    status = pjsip_inv_usage_init(pjsua.endpt, &pjsua.mod, &inv_cb);
+    
+    return status;
+}
diff --git a/pjsip/src/pjsua-lib/pjsua_core.c b/pjsip/src/pjsua-lib/pjsua_core.c
new file mode 100644
index 00000000..b09a7c59
--- /dev/null
+++ b/pjsip/src/pjsua-lib/pjsua_core.c
@@ -0,0 +1,910 @@
+/* $Id$ */
+/* 
+ * Copyright (C) 2003-2006 Benny Prijono <benny@prijono.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+#include <pjsua-lib/pjsua.h>
+
+/*
+ * pjsua_core.c
+ *
+ * Core application functionalities.
+ */
+
+#define THIS_FILE   "pjsua_core.c"
+
+
+/* 
+ * Global variable.
+ */
+struct pjsua pjsua;
+
+
+/* 
+ * Default local URI, if none is specified in cmd-line 
+ */
+#define PJSUA_LOCAL_URI	    "<sip:user@127.0.0.1>"
+
+
+
+/*
+ * Init default application parameters.
+ */
+void pjsua_default(void)
+{
+    unsigned i;
+
+
+    /* Normally need another thread for console application, because main 
+     * thread will be blocked in fgets().
+     */
+    pjsua.thread_cnt = 1;
+
+
+    /* Default transport settings: */
+    pjsua.sip_port = 5060;
+
+
+    /* Default logging settings: */
+    pjsua.log_level = 5;
+    pjsua.app_log_level = 4;
+    pjsua.log_decor = PJ_LOG_HAS_SENDER | PJ_LOG_HAS_TIME | 
+		      PJ_LOG_HAS_MICRO_SEC | PJ_LOG_HAS_NEWLINE;
+
+
+    /* Default: do not use STUN: */
+    pjsua.stun_port1 = pjsua.stun_port2 = 0;
+
+    /* Init accounts: */
+    pjsua.acc_cnt = 1;
+    for (i=0; i<PJ_ARRAY_SIZE(pjsua.acc); ++i) {
+	pjsua.acc[i].index = i;
+	pjsua.acc[i].local_uri = pj_str(PJSUA_LOCAL_URI);
+	pjsua.acc[i].reg_timeout = 55;
+	pj_list_init(&pjsua.acc[i].route_set);
+	pj_list_init(&pjsua.acc[i].pres_srv_list);
+    }
+
+    /* Init call array: */
+    for (i=0; i<PJ_ARRAY_SIZE(pjsua.calls); ++i)
+	pjsua.calls[i].index = i;
+
+    /* Default max nb of calls. */
+    pjsua.max_calls = 4;
+
+    /* Init server presence subscription list: */
+    
+
+}
+
+
+
+/*
+ * Handler for receiving incoming requests.
+ *
+ * This handler serves multiple purposes:
+ *  - it receives requests outside dialogs.
+ *  - it receives requests inside dialogs, when the requests are
+ *    unhandled by other dialog usages. Example of these
+ *    requests are: MESSAGE.
+ */
+static pj_bool_t mod_pjsua_on_rx_request(pjsip_rx_data *rdata)
+{
+
+    if (rdata->msg_info.msg->line.req.method.id == PJSIP_INVITE_METHOD) {
+
+	return pjsua_call_on_incoming(rdata);
+    }
+
+    return PJ_FALSE;
+}
+
+
+/*
+ * Handler for receiving incoming responses.
+ *
+ * This handler serves multiple purposes:
+ *  - it receives strayed responses (i.e. outside any dialog and
+ *    outside any transactions).
+ *  - it receives responses coming to a transaction, when pjsua
+ *    module is set as transaction user for the transaction.
+ *  - it receives responses inside a dialog, when these responses
+ *    are unhandled by other dialog usages.
+ */
+static pj_bool_t mod_pjsua_on_rx_response(pjsip_rx_data *rdata)
+{
+    PJ_UNUSED_ARG(rdata);
+    return PJ_FALSE;
+}
+
+
+/* 
+ * Initialize sockets and optionally get the public address via STUN. 
+ */
+static pj_status_t init_sockets(pj_bool_t sip,
+				pjmedia_sock_info *skinfo)
+{
+    enum { 
+	RTP_START_PORT = 4000,
+	RTP_RANDOM_START = 2,
+	RTP_RETRY = 100
+    };
+    enum {
+	SIP_SOCK,
+	RTP_SOCK,
+	RTCP_SOCK,
+    };
+    int i;
+    static pj_uint16_t rtp_port = RTP_START_PORT;
+    pj_sock_t sock[3];
+    pj_sockaddr_in mapped_addr[3];
+    pj_status_t status = PJ_SUCCESS;
+
+    for (i=0; i<3; ++i)
+	sock[i] = PJ_INVALID_SOCKET;
+
+    /* Create and bind SIP UDP socket. */
+    status = pj_sock_socket(PJ_AF_INET, PJ_SOCK_DGRAM, 0, &sock[SIP_SOCK]);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "socket() error", status);
+	goto on_error;
+    }
+
+    if (sip) {
+	status = pj_sock_bind_in(sock[SIP_SOCK], 0, pjsua.sip_port);
+	if (status != PJ_SUCCESS) {
+	    pjsua_perror(THIS_FILE, "bind() error", status);
+	    goto on_error;
+	}
+    } else {
+	status = pj_sock_bind_in(sock[SIP_SOCK], 0, 0);
+	if (status != PJ_SUCCESS) {
+	    pjsua_perror(THIS_FILE, "bind() error", status);
+	    goto on_error;
+	}
+    }
+
+
+    /* Loop retry to bind RTP and RTCP sockets. */
+    for (i=0; i<RTP_RETRY; ++i, rtp_port += 2) {
+
+	/* Create and bind RTP socket. */
+	status = pj_sock_socket(PJ_AF_INET, PJ_SOCK_DGRAM, 0, &sock[RTP_SOCK]);
+	if (status != PJ_SUCCESS) {
+	    pjsua_perror(THIS_FILE, "socket() error", status);
+	    goto on_error;
+	}
+
+	status = pj_sock_bind_in(sock[RTP_SOCK], 0, rtp_port);
+	if (status != PJ_SUCCESS) {
+	    pj_sock_close(sock[RTP_SOCK]); 
+	    sock[RTP_SOCK] = PJ_INVALID_SOCKET;
+	    continue;
+	}
+
+	/* Create and bind RTCP socket. */
+	status = pj_sock_socket(PJ_AF_INET, PJ_SOCK_DGRAM, 0, &sock[RTCP_SOCK]);
+	if (status != PJ_SUCCESS) {
+	    pjsua_perror(THIS_FILE, "socket() error", status);
+	    goto on_error;
+	}
+
+	status = pj_sock_bind_in(sock[RTCP_SOCK], 0, (pj_uint16_t)(rtp_port+1));
+	if (status != PJ_SUCCESS) {
+	    pj_sock_close(sock[RTP_SOCK]); 
+	    sock[RTP_SOCK] = PJ_INVALID_SOCKET;
+
+	    pj_sock_close(sock[RTCP_SOCK]); 
+	    sock[RTCP_SOCK] = PJ_INVALID_SOCKET;
+	    continue;
+	}
+
+	/*
+	 * If we're configured to use STUN, then find out the mapped address,
+	 * and make sure that the mapped RTCP port is adjacent with the RTP.
+	 */
+	if (pjsua.stun_port1 == 0) {
+	    const pj_str_t *hostname;
+	    pj_sockaddr_in addr;
+
+	    /* Get local IP address. */
+	    hostname = pj_gethostname();
+
+	    pj_memset( &addr, 0, sizeof(addr));
+	    addr.sin_family = PJ_AF_INET;
+	    status = pj_sockaddr_in_set_str_addr( &addr, hostname);
+	    if (status != PJ_SUCCESS) {
+		pjsua_perror(THIS_FILE, "Unresolvable local hostname", 
+			     status);
+		goto on_error;
+	    }
+
+	    for (i=0; i<3; ++i)
+		pj_memcpy(&mapped_addr[i], &addr, sizeof(addr));
+
+	    if (sip) {
+		mapped_addr[SIP_SOCK].sin_port = 
+		    pj_htons((pj_uint16_t)pjsua.sip_port);
+	    }
+	    mapped_addr[RTP_SOCK].sin_port=pj_htons((pj_uint16_t)rtp_port);
+	    mapped_addr[RTCP_SOCK].sin_port=pj_htons((pj_uint16_t)(rtp_port+1));
+	    break;
+
+	} else {
+	    status=pj_stun_get_mapped_addr(&pjsua.cp.factory, 3, sock,
+					   &pjsua.stun_srv1, pjsua.stun_port1,
+					   &pjsua.stun_srv2, pjsua.stun_port2,
+					   mapped_addr);
+	    if (status != PJ_SUCCESS) {
+		pjsua_perror(THIS_FILE, "STUN error", status);
+		goto on_error;
+	    }
+
+	    if (pj_ntohs(mapped_addr[2].sin_port) == 
+		pj_ntohs(mapped_addr[1].sin_port)+1)
+	    {
+		break;
+	    }
+
+	    pj_sock_close(sock[RTP_SOCK]); 
+	    sock[RTP_SOCK] = PJ_INVALID_SOCKET;
+
+	    pj_sock_close(sock[RTCP_SOCK]); 
+	    sock[RTCP_SOCK] = PJ_INVALID_SOCKET;
+	}
+    }
+
+    if (sock[RTP_SOCK] == PJ_INVALID_SOCKET) {
+	PJ_LOG(1,(THIS_FILE, 
+		  "Unable to find appropriate RTP/RTCP ports combination"));
+	goto on_error;
+    }
+
+    if (sip) {
+	pjsua.sip_sock = sock[SIP_SOCK];
+	pj_memcpy(&pjsua.sip_sock_name, 
+		  &mapped_addr[SIP_SOCK], 
+		  sizeof(pj_sockaddr_in));
+    } else {
+	pj_sock_close(sock[0]);
+    }
+
+    skinfo->rtp_sock = sock[RTP_SOCK];
+    pj_memcpy(&skinfo->rtp_addr_name, 
+	      &mapped_addr[RTP_SOCK], sizeof(pj_sockaddr_in));
+
+    skinfo->rtcp_sock = sock[RTCP_SOCK];
+    pj_memcpy(&skinfo->rtcp_addr_name, 
+	      &mapped_addr[RTCP_SOCK], sizeof(pj_sockaddr_in));
+
+    if (sip) {
+	PJ_LOG(4,(THIS_FILE, "SIP UDP socket reachable at %s:%d",
+		  pj_inet_ntoa(pjsua.sip_sock_name.sin_addr), 
+		  pj_ntohs(pjsua.sip_sock_name.sin_port)));
+    }
+    PJ_LOG(4,(THIS_FILE, "RTP socket reachable at %s:%d",
+	      pj_inet_ntoa(skinfo->rtp_addr_name.sin_addr), 
+	      pj_ntohs(skinfo->rtp_addr_name.sin_port)));
+    PJ_LOG(4,(THIS_FILE, "RTCP UDP socket reachable at %s:%d",
+	      pj_inet_ntoa(skinfo->rtcp_addr_name.sin_addr), 
+	      pj_ntohs(skinfo->rtcp_addr_name.sin_port)));
+
+    rtp_port += 2;
+    return PJ_SUCCESS;
+
+on_error:
+    for (i=0; i<3; ++i) {
+	if (sip && i==0)
+	    continue;
+	if (sock[i] != PJ_INVALID_SOCKET)
+	    pj_sock_close(sock[i]);
+    }
+    return status;
+}
+
+
+
+/* 
+ * Initialize stack. 
+ */
+static pj_status_t init_stack(void)
+{
+    pj_status_t status;
+
+    /* Create global endpoint: */
+
+    {
+	const pj_str_t *hostname;
+	const char *endpt_name;
+
+	/* Endpoint MUST be assigned a globally unique name.
+	 * The name will be used as the hostname in Warning header.
+	 */
+
+	/* For this implementation, we'll use hostname for simplicity */
+	hostname = pj_gethostname();
+	endpt_name = hostname->ptr;
+
+	/* Create the endpoint: */
+
+	status = pjsip_endpt_create(&pjsua.cp.factory, endpt_name, 
+				    &pjsua.endpt);
+	if (status != PJ_SUCCESS) {
+	    pjsua_perror(THIS_FILE, "Unable to create SIP endpoint", status);
+	    return status;
+	}
+    }
+
+
+    /* Initialize transaction layer: */
+
+    status = pjsip_tsx_layer_init_module(pjsua.endpt);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Transaction layer initialization error", 
+		     status);
+	goto on_error;
+    }
+
+    /* Initialize UA layer module: */
+
+    status = pjsip_ua_init_module( pjsua.endpt, NULL );
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "UA layer initialization error", status);
+	goto on_error;
+    }
+
+    /* Initialize and register pjsua's application module: */
+
+    {
+	pjsip_module my_mod = 
+	{
+	NULL, NULL,		    /* prev, next.			*/
+	{ "mod-pjsua", 9 },	    /* Name.				*/
+	-1,			    /* Id				*/
+	PJSIP_MOD_PRIORITY_APPLICATION,	/* Priority			*/
+	NULL,			    /* load()				*/
+	NULL,			    /* start()				*/
+	NULL,			    /* stop()				*/
+	NULL,			    /* unload()				*/
+	&mod_pjsua_on_rx_request,   /* on_rx_request()			*/
+	&mod_pjsua_on_rx_response,  /* on_rx_response()			*/
+	NULL,			    /* on_tx_request.			*/
+	NULL,			    /* on_tx_response()			*/
+	NULL,			    /* on_tsx_state()			*/
+	};
+
+	pjsua.mod = my_mod;
+
+	status = pjsip_endpt_register_module(pjsua.endpt, &pjsua.mod);
+	if (status != PJ_SUCCESS) {
+	    pjsua_perror(THIS_FILE, "Unable to register pjsua module", 
+			 status);
+	    goto on_error;
+	}
+    }
+
+    /* Initialize invite session module: */
+
+    status = pjsua_call_init();
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Invite usage initialization error", 
+		     status);
+	goto on_error;
+    }
+
+    /* Done */
+
+    return PJ_SUCCESS;
+
+
+on_error:
+    pjsip_endpt_destroy(pjsua.endpt);
+    pjsua.endpt = NULL;
+    return status;
+}
+
+
+static int PJ_THREAD_FUNC pjsua_poll(void *arg)
+{
+    PJ_UNUSED_ARG(arg);
+
+    do {
+	pj_time_val timeout = { 0, 10 };
+	pjsip_endpt_handle_events (pjsua.endpt, &timeout);
+    } while (!pjsua.quit_flag);
+
+    return 0;
+}
+
+/*
+ * Initialize pjsua application.
+ * This will initialize all libraries, create endpoint instance, and register
+ * pjsip modules.
+ */
+pj_status_t pjsua_init(void)
+{
+    pj_status_t status;
+
+    /* Init PJLIB logging: */
+
+    pj_log_set_level(pjsua.log_level);
+    pj_log_set_decor(pjsua.log_decor);
+
+
+    /* Init PJLIB: */
+
+    status = pj_init();
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "pj_init() error", status);
+	return status;
+    }
+
+    /* Init PJLIB-UTIL: */
+
+    status = pjlib_util_init();
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "pjlib_util_init() error", status);
+	return status;
+    }
+
+    /* Init memory pool: */
+
+    /* Init caching pool. */
+    pj_caching_pool_init(&pjsua.cp, &pj_pool_factory_default_policy, 0);
+
+    /* Create memory pool for application. */
+    pjsua.pool = pj_pool_create(&pjsua.cp.factory, "pjsua", 4000, 4000, NULL);
+
+
+    /* Init PJSIP : */
+
+    status = init_stack();
+    if (status != PJ_SUCCESS) {
+	pj_caching_pool_destroy(&pjsua.cp);
+	pjsua_perror(THIS_FILE, "Stack initialization has returned error", 
+		     status);
+	return status;
+    }
+
+
+    /* Init core SIMPLE module : */
+
+    pjsip_evsub_init_module(pjsua.endpt);
+
+    /* Init presence module: */
+
+    pjsip_pres_init_module( pjsua.endpt, pjsip_evsub_instance());
+
+    /* Init xfer/REFER module */
+
+    pjsip_xfer_init_module( pjsua.endpt );
+
+    /* Init pjsua presence handler: */
+
+    pjsua_pres_init();
+
+
+    /* Init media endpoint: */
+
+    status = pjmedia_endpt_create(&pjsua.cp.factory, &pjsua.med_endpt);
+    if (status != PJ_SUCCESS) {
+	pj_caching_pool_destroy(&pjsua.cp);
+	pjsua_perror(THIS_FILE, 
+		     "Media stack initialization has returned error", 
+		     status);
+	return status;
+    }
+
+    /* Init conference bridge. */
+
+    status = pjmedia_conf_create(pjsua.pool, 
+				 pjsua.max_calls+PJSUA_CONF_MORE_PORTS, 
+				 8000, 160, 16, &pjsua.mconf);
+    if (status != PJ_SUCCESS) {
+	pj_caching_pool_destroy(&pjsua.cp);
+	pjsua_perror(THIS_FILE, 
+		     "Media stack initialization has returned error", 
+		     status);
+	return status;
+    }
+
+    /* Init pjmedia-codecs: */
+
+    status = pjmedia_codec_init(pjsua.med_endpt);
+    if (status != PJ_SUCCESS) {
+	pj_caching_pool_destroy(&pjsua.cp);
+	pjsua_perror(THIS_FILE, 
+		     "Media codec initialization has returned error", 
+		     status);
+	return status;
+    }
+
+
+    /* Done. */
+    return PJ_SUCCESS;
+}
+
+
+/*
+ * Find account for incoming request.
+ */
+int pjsua_find_account_for_incoming(pjsip_rx_data *rdata)
+{
+    pjsip_uri *uri;
+    pjsip_sip_uri *sip_uri;
+    int acc_index;
+
+    uri = rdata->msg_info.to->uri;
+
+    /* Just return account #0 if To URI is not SIP: */
+    if (!PJSIP_URI_SCHEME_IS_SIP(uri) && 
+	!PJSIP_URI_SCHEME_IS_SIPS(uri)) 
+    {
+	return 0;
+    }
+
+
+    sip_uri = (pjsip_sip_uri*)pjsip_uri_get_uri(uri);
+
+    /* Find account which has matching username and domain. */
+    for (acc_index=0; acc_index < pjsua.acc_cnt; ++acc_index) {
+
+	pjsua_acc *acc = &pjsua.acc[acc_index];
+
+	if (pj_stricmp(&acc->user_part, &sip_uri->user)==0 &&
+	    pj_stricmp(&acc->host_part, &sip_uri->host)==0) 
+	{
+	    /* Match ! */
+	    return acc_index;
+	}
+    }
+
+    /* No matching, try match domain part only. */
+    for (acc_index=0; acc_index < pjsua.acc_cnt; ++acc_index) {
+
+	pjsua_acc *acc = &pjsua.acc[acc_index];
+
+	if (pj_stricmp(&acc->host_part, &sip_uri->host)==0) {
+	    /* Match ! */
+	    return acc_index;
+	}
+    }
+
+    /* Still no match, just return account #0 */
+    return 0;
+}
+
+
+/*
+ * Find account for outgoing request.
+ */
+int pjsua_find_account_for_outgoing(const pj_str_t *url)
+{
+    PJ_UNUSED_ARG(url);
+
+    /* Just use account #0 */
+    return 0;
+}
+
+
+/*
+ * Start pjsua stack.
+ * This will start the registration process, if registration is configured.
+ */
+pj_status_t pjsua_start(void)
+{
+    int i;  /* Must be signed */
+    pjsip_transport *udp_transport;
+    pj_status_t status = PJ_SUCCESS;
+
+    /* Create WAV file player if required: */
+
+    if (pjsua.wav_file) {
+	pjmedia_port *port;
+	pj_str_t port_name;
+
+	/* Create the file player port. */
+	status = pjmedia_file_player_port_create( pjsua.pool, pjsua.wav_file,
+						  0, -1, NULL, &port);
+	if (status != PJ_SUCCESS) {
+	    pjsua_perror(THIS_FILE, 
+			 "Error playing media file", 
+			 status);
+	    return status;
+	}
+
+	/* Add port to conference bridge: */
+	status = pjmedia_conf_add_port(pjsua.mconf, pjsua.pool, port, 
+				       pj_cstr(&port_name, pjsua.wav_file),
+				       &pjsua.wav_slot);
+	if (status != PJ_SUCCESS) {
+	    pjsua_perror(THIS_FILE, 
+			 "Unable to add file player to conference bridge", 
+			 status);
+	    return status;
+	}
+    }
+
+
+    /* Init sockets (STUN etc): */
+    for (i=0; i<(int)pjsua.max_calls; ++i) {
+	status = init_sockets(i==0, &pjsua.calls[i].skinfo);
+	if (status != PJ_SUCCESS) {
+	    pjsua_perror(THIS_FILE, "init_sockets() has returned error", 
+			 status);
+	    --i;
+	    if (i >= 0)
+		pj_sock_close(pjsua.sip_sock);
+	    while (i >= 0) {
+		pj_sock_close(pjsua.calls[i].skinfo.rtp_sock);
+		pj_sock_close(pjsua.calls[i].skinfo.rtcp_sock);
+	    }
+	    return status;
+	}
+    }
+
+    /* Add UDP transport: */
+
+    {
+	/* Init the published name for the transport.
+         * Depending whether STUN is used, this may be the STUN mapped
+	 * address, or socket's bound address.
+	 */
+	pjsip_host_port addr_name;
+
+	addr_name.host.ptr = pj_inet_ntoa(pjsua.sip_sock_name.sin_addr);
+	addr_name.host.slen = pj_ansi_strlen(addr_name.host.ptr);
+	addr_name.port = pj_ntohs(pjsua.sip_sock_name.sin_port);
+
+	/* Create UDP transport from previously created UDP socket: */
+
+	status = pjsip_udp_transport_attach( pjsua.endpt, pjsua.sip_sock,
+					     &addr_name, 1, 
+					     &udp_transport);
+	if (status != PJ_SUCCESS) {
+	    pjsua_perror(THIS_FILE, "Unable to start UDP transport", 
+			 status);
+	    return status;
+	}
+    }
+
+    /* Initialize Contact URI, if one is not specified: */
+    for (i=0; i<pjsua.acc_cnt; ++i) {
+
+	pjsip_uri *uri;
+	pjsip_sip_uri *sip_uri;
+
+	/* Need to parse local_uri to get the elements: */
+
+	uri = pjsip_parse_uri(pjsua.pool, pjsua.acc[i].local_uri.ptr,
+			      pjsua.acc[i].local_uri.slen, 0);
+	if (uri == NULL) {
+	    pjsua_perror(THIS_FILE, "Invalid local URI", 
+			 PJSIP_EINVALIDURI);
+	    return PJSIP_EINVALIDURI;
+	}
+
+	/* Local URI MUST be a SIP or SIPS: */
+
+	if (!PJSIP_URI_SCHEME_IS_SIP(uri) && 
+	    !PJSIP_URI_SCHEME_IS_SIPS(uri)) 
+	{
+	    pjsua_perror(THIS_FILE, "Invalid local URI", 
+			 PJSIP_EINVALIDSCHEME);
+	    return PJSIP_EINVALIDSCHEME;
+	}
+
+
+	/* Get the SIP URI object: */
+
+	sip_uri = (pjsip_sip_uri*) pjsip_uri_get_uri(uri);
+
+	pjsua.acc[i].user_part = sip_uri->user;
+	pjsua.acc[i].host_part = sip_uri->host;
+
+	if (pjsua.acc[i].contact_uri.slen == 0 && 
+	    pjsua.acc[i].local_uri.slen) 
+	{
+	    char contact[128];
+	    int len;
+
+	    /* The local Contact is the username@ip-addr, where
+	     *  - username is taken from the local URI,
+	     *  - ip-addr in UDP transport's address name (which may have been
+	     *    resolved from STUN.
+	     */
+	    
+	    /* Build temporary contact string. */
+
+	    if (sip_uri->user.slen) {
+
+		/* With the user part. */
+		len = pj_snprintf(contact, sizeof(contact),
+				  "<sip:%.*s@%.*s:%d>",
+				  (int)sip_uri->user.slen,
+				  sip_uri->user.ptr,
+				  (int)udp_transport->local_name.host.slen,
+				  udp_transport->local_name.host.ptr,
+				  udp_transport->local_name.port);
+	    } else {
+
+		/* Without user part */
+
+		len = pj_snprintf(contact, sizeof(contact),
+				  "<sip:%.*s:%d>",
+				  (int)udp_transport->local_name.host.slen,
+				  udp_transport->local_name.host.ptr,
+				  udp_transport->local_name.port);
+	    }
+
+	    if (len < 1 || len >= sizeof(contact)) {
+		pjsua_perror(THIS_FILE, "Invalid Contact", PJSIP_EURITOOLONG);
+		return PJSIP_EURITOOLONG;
+	    }
+
+	    /* Duplicate Contact uri. */
+
+	    pj_strdup2(pjsua.pool, &pjsua.acc[i].contact_uri, contact);
+
+	}
+    }
+
+    /* If outbound_proxy is specified, put it in the route_set: */
+
+    if (pjsua.outbound_proxy.slen) {
+
+	pjsip_route_hdr *route;
+	const pj_str_t hname = { "Route", 5 };
+	int parsed_len;
+
+	route = pjsip_parse_hdr( pjsua.pool, &hname, 
+				 pjsua.outbound_proxy.ptr, 
+				 pjsua.outbound_proxy.slen,
+				   &parsed_len);
+	if (route == NULL) {
+	    pjsua_perror(THIS_FILE, "Invalid outbound proxy URL", 
+			 PJSIP_EINVALIDURI);
+	    return PJSIP_EINVALIDURI;
+	}
+
+	for (i=0; i<pjsua.acc_cnt; ++i) {
+	    pj_list_push_front(&pjsua.acc[i].route_set, route);
+	}
+    }
+
+
+    /* Create worker thread(s), if required: */
+
+    for (i=0; i<pjsua.thread_cnt; ++i) {
+	status = pj_thread_create( pjsua.pool, "pjsua", &pjsua_poll,
+				   NULL, 0, 0, &pjsua.threads[i]);
+	if (status != PJ_SUCCESS) {
+	    pjsua.quit_flag = 1;
+	    for (--i; i>=0; --i) {
+		pj_thread_join(pjsua.threads[i]);
+		pj_thread_destroy(pjsua.threads[i]);
+	    }
+	    return status;
+	}
+    }
+
+    /* Start registration: */
+
+    /* Create client registration session: */
+    for (i=0; i<pjsua.acc_cnt; ++i) {
+	status = pjsua_regc_init(i);
+	if (status != PJ_SUCCESS)
+	    return status;
+
+	/* Perform registration, if required. */
+	if (pjsua.acc[i].regc) {
+	    pjsua_regc_update(i, 1);
+	}
+    }
+
+
+    /* Find account for outgoing preence subscription */
+    for (i=0; i<pjsua.buddy_cnt; ++i) {
+	pjsua.buddies[i].acc_index = 
+	    pjsua_find_account_for_outgoing(&pjsua.buddies[i].uri);
+    }
+
+
+    PJ_LOG(3,(THIS_FILE, "PJSUA version %s started", PJ_VERSION));
+    return PJ_SUCCESS;
+}
+
+
+/* Sleep with polling */
+static void busy_sleep(unsigned msec)
+{
+    pj_time_val timeout, now;
+
+    pj_gettimeofday(&timeout);
+    timeout.msec += msec;
+    pj_time_val_normalize(&timeout);
+
+    do {
+	pjsua_poll(NULL);
+	pj_gettimeofday(&now);
+    } while (PJ_TIME_VAL_LT(now, timeout));
+}
+
+/*
+ * Destroy pjsua.
+ */
+pj_status_t pjsua_destroy(void)
+{
+    int i;
+
+    /* Signal threads to quit: */
+    pjsua.quit_flag = 1;
+
+    /* Terminate all calls. */
+    pjsua_inv_shutdown();
+
+    /* Terminate all presence subscriptions. */
+    pjsua_pres_shutdown();
+
+    /* Unregister, if required: */
+    for (i=0; i<pjsua.acc_cnt; ++i) {
+	if (pjsua.acc[i].regc) {
+	    pjsua_regc_update(i, 0);
+	}
+    }
+
+    /* Wait worker threads to quit: */
+    for (i=0; i<pjsua.thread_cnt; ++i) {
+	
+	if (pjsua.threads[i]) {
+	    pj_thread_join(pjsua.threads[i]);
+	    pj_thread_destroy(pjsua.threads[i]);
+	    pjsua.threads[i] = NULL;
+	}
+    }
+
+
+    /* Wait for some time to allow unregistration to complete: */
+    PJ_LOG(4,(THIS_FILE, "Shutting down..."));
+    busy_sleep(1000);
+
+    /* Destroy conference bridge. */
+    if (pjsua.mconf)
+	pjmedia_conf_destroy(pjsua.mconf);
+
+    /* Shutdown pjmedia-codec: */
+    pjmedia_codec_deinit();
+
+    /* Destroy sound framework: 
+     * (this should be done in pjmedia_shutdown())
+     */
+    pj_snd_deinit();
+
+    /* Destroy endpoint. */
+
+    pjsip_endpt_destroy(pjsua.endpt);
+    pjsua.endpt = NULL;
+
+    /* Destroy caching pool. */
+
+    pj_caching_pool_destroy(&pjsua.cp);
+
+
+    /* Done. */
+
+    return PJ_SUCCESS;
+}
+
diff --git a/pjsip/src/pjsua-lib/pjsua_opt.c b/pjsip/src/pjsua-lib/pjsua_opt.c
new file mode 100644
index 00000000..bdd1a421
--- /dev/null
+++ b/pjsip/src/pjsua-lib/pjsua_opt.c
@@ -0,0 +1,865 @@
+/* $Id$ */
+/* 
+ * Copyright (C) 2003-2006 Benny Prijono <benny@prijono.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+#include <pjsua-lib/pjsua.h>
+#include <pjsua-lib/getopt.h>
+
+#define THIS_FILE   "pjsua_opt.c"
+
+
+const char *pjsua_inv_state_names[] =
+{
+    "NULL      ",
+    "CALLING   ",
+    "INCOMING  ",
+    "EARLY     ",
+    "CONNECTING",
+    "CONFIRMED ",
+    "DISCONNCTD",
+    "TERMINATED",
+};
+
+
+
+/* Show usage */
+static void usage(void)
+{
+    puts("Usage:");
+    puts("  pjsua [options]");
+    puts("");
+    puts("General options:");
+    puts("  --help              Display this help screen");
+    puts("  --version           Display version info");
+    puts("");
+    puts("Logging options:");
+    puts("  --config-file=file  Read the config/arguments from file.");
+    puts("  --log-file=fname    Log to filename (default stderr)");
+    puts("  --log-level=N       Set log max level to N (0(none) to 6(trace))");
+    puts("  --app-log-level=N   Set log max level for stdout display to N");
+    puts("");
+    puts("SIP Account options:");
+    puts("  --id=url            Set the URL of local ID (used in From header)");
+    puts("  --contact=url       Override the Contact information");
+    puts("  --proxy=url         Set the URL of proxy server");
+    puts("");
+    puts("SIP Account Registration Options:");
+    puts("  --registrar=url     Set the URL of registrar server");
+    puts("  --reg-timeout=secs  Set registration interval to secs (default 3600)");
+    puts("");
+    puts("SIP Account Control:");
+    puts("  --next-account      Add more account");
+    puts("");
+    puts("Authentication options:");
+    puts("  --realm=string      Set realm");
+    puts("  --username=string   Set authentication username");
+    puts("  --password=string   Set authentication password");
+    puts("  --next-cred         Add more credential");
+    puts("");
+    puts("Transport Options:");
+    puts("  --local-port=port        Set TCP/UDP port");
+    puts("  --outbound=url           Set the URL of outbound proxy server");
+    puts("  --use-stun1=host[:port]");
+    puts("  --use-stun2=host[:port]  Resolve local IP with the specified STUN servers");
+    puts("");
+    puts("Media Options:");
+    puts("  --null-audio        Use NULL audio device");
+    puts("  --play-file=file    Play WAV file in conference bridge");
+    puts("  --auto-play         Automatically play the file (to incoming calls only)");
+    puts("  --auto-loop         Automatically loop incoming RTP to outgoing RTP");
+    puts("  --auto-conf         Automatically put incoming calls to conference");
+    puts("");
+    puts("Buddy List (can be more than one):");
+    puts("  --add-buddy url     Add the specified URL to the buddy list.");
+    puts("");
+    puts("User Agent options:");
+    puts("  --auto-answer=code  Automatically answer incoming calls with code (e.g. 200)");
+    puts("  --max-calls=N       Maximum number of concurrent calls (default:4, max:255)");
+    puts("");
+    fflush(stdout);
+}
+
+
+
+/*
+ * Verify that valid SIP url is given.
+ */
+pj_status_t pjsua_verify_sip_url(const char *c_url)
+{
+    pjsip_uri *p;
+    pj_pool_t *pool;
+    char *url;
+    int len = (c_url ? pj_ansi_strlen(c_url) : 0);
+
+    if (!len) return -1;
+
+    pool = pj_pool_create(&pjsua.cp.factory, "check%p", 1024, 0, NULL);
+    if (!pool) return -1;
+
+    url = pj_pool_alloc(pool, len+1);
+    pj_ansi_strcpy(url, c_url);
+
+    p = pjsip_parse_uri(pool, url, len, 0);
+    if (!p || pj_stricmp2(pjsip_uri_get_scheme(p), "sip") != 0)
+	p = NULL;
+
+    pj_pool_release(pool);
+    return p ? 0 : -1;
+}
+
+
+/*
+ * Read command arguments from config file.
+ */
+static int read_config_file(pj_pool_t *pool, const char *filename, 
+			    int *app_argc, char ***app_argv)
+{
+    int i;
+    FILE *fhnd;
+    char line[200];
+    int argc = 0;
+    char **argv;
+    enum { MAX_ARGS = 64 };
+
+    /* Allocate MAX_ARGS+1 (argv needs to be terminated with NULL argument) */
+    argv = pj_pool_calloc(pool, MAX_ARGS+1, sizeof(char*));
+    argv[argc++] = *app_argv[0];
+
+    /* Open config file. */
+    fhnd = fopen(filename, "rt");
+    if (!fhnd) {
+	printf("Unable to open config file %s\n", filename);
+	fflush(stdout);
+	return -1;
+    }
+
+    /* Scan tokens in the file. */
+    while (argc < MAX_ARGS && !feof(fhnd)) {
+	char *token, *p = line;
+
+	if (fgets(line, sizeof(line), fhnd) == NULL) break;
+
+	for (token = strtok(p, " \t\r\n"); argc < MAX_ARGS; 
+	     token = strtok(NULL, " \t\r\n"))
+	{
+	    int token_len;
+	    
+	    if (!token) break;
+	    if (*token == '#') break;
+
+	    token_len = strlen(token);
+	    if (!token_len)
+		continue;
+	    argv[argc] = pj_pool_alloc(pool, token_len+1);
+	    pj_memcpy(argv[argc], token, token_len+1);
+	    ++argc;
+	}
+    }
+
+    /* Copy arguments from command line */
+    for (i=1; i<*app_argc && argc < MAX_ARGS; ++i)
+	argv[argc++] = (*app_argv)[i];
+
+    if (argc == MAX_ARGS && (i!=*app_argc || !feof(fhnd))) {
+	printf("Too many arguments specified in cmd line/config file\n");
+	fflush(stdout);
+	fclose(fhnd);
+	return -1;
+    }
+
+    fclose(fhnd);
+
+    /* Assign the new command line back to the original command line. */
+    *app_argc = argc;
+    *app_argv = argv;
+    return 0;
+
+}
+
+static int my_atoi(const char *cs)
+{
+    pj_str_t s;
+    return pj_strtoul(pj_cstr(&s, cs));
+}
+
+
+/* Parse arguments. */
+pj_status_t pjsua_parse_args(int argc, char *argv[])
+{
+    int c;
+    int option_index;
+    enum { OPT_CONFIG_FILE, OPT_LOG_FILE, OPT_LOG_LEVEL, OPT_APP_LOG_LEVEL, 
+	   OPT_HELP, OPT_VERSION, OPT_NULL_AUDIO,
+	   OPT_LOCAL_PORT, OPT_PROXY, OPT_OUTBOUND_PROXY, OPT_REGISTRAR,
+	   OPT_REG_TIMEOUT, OPT_ID, OPT_CONTACT, 
+	   OPT_REALM, OPT_USERNAME, OPT_PASSWORD,
+	   OPT_USE_STUN1, OPT_USE_STUN2, 
+	   OPT_ADD_BUDDY, OPT_OFFER_X_MS_MSG, OPT_NO_PRESENCE,
+	   OPT_AUTO_ANSWER, OPT_AUTO_HANGUP, OPT_AUTO_PLAY, OPT_AUTO_LOOP,
+	   OPT_AUTO_CONF,
+	   OPT_PLAY_FILE,
+	   OPT_NEXT_ACCOUNT, OPT_NEXT_CRED, OPT_MAX_CALLS,
+    };
+    struct option long_options[] = {
+	{ "config-file",1, 0, OPT_CONFIG_FILE},
+	{ "log-file",	1, 0, OPT_LOG_FILE},
+	{ "log-level",	1, 0, OPT_LOG_LEVEL},
+	{ "app-log-level",1,0,OPT_APP_LOG_LEVEL},
+	{ "help",	0, 0, OPT_HELP},
+	{ "version",	0, 0, OPT_VERSION},
+	{ "null-audio", 0, 0, OPT_NULL_AUDIO},
+	{ "local-port", 1, 0, OPT_LOCAL_PORT},
+	{ "proxy",	1, 0, OPT_PROXY},
+	{ "outbound",	1, 0, OPT_OUTBOUND_PROXY},
+	{ "registrar",	1, 0, OPT_REGISTRAR},
+	{ "reg-timeout",1, 0, OPT_REG_TIMEOUT},
+	{ "id",		1, 0, OPT_ID},
+	{ "contact",	1, 0, OPT_CONTACT},
+	{ "realm",	1, 0, OPT_REALM},
+	{ "username",	1, 0, OPT_USERNAME},
+	{ "password",	1, 0, OPT_PASSWORD},
+	{ "use-stun1",  1, 0, OPT_USE_STUN1},
+	{ "use-stun2",  1, 0, OPT_USE_STUN2},
+	{ "add-buddy",  1, 0, OPT_ADD_BUDDY},
+	{ "offer-x-ms-msg",0,0,OPT_OFFER_X_MS_MSG},
+	{ "no-presence", 0, 0, OPT_NO_PRESENCE},
+	{ "auto-answer",1, 0, OPT_AUTO_ANSWER},
+	{ "auto-hangup",1, 0, OPT_AUTO_HANGUP},
+	{ "auto-play",  0, 0, OPT_AUTO_PLAY},
+	{ "auto-loop",  0, 0, OPT_AUTO_LOOP},
+	{ "auto-conf",  0, 0, OPT_AUTO_CONF},
+	{ "play-file",  1, 0, OPT_PLAY_FILE},
+	{ "next-account",0,0, OPT_NEXT_ACCOUNT},
+	{ "next-cred",	0, 0, OPT_NEXT_CRED},
+	{ "max-calls",	1, 0, OPT_MAX_CALLS},
+	{ NULL, 0, 0, 0}
+    };
+    pj_status_t status;
+    pjsua_acc *cur_acc;
+    pjsip_cred_info *cur_cred;
+    char *config_file = NULL;
+
+    /* Run getopt once to see if user specifies config file to read. */
+    while ((c=getopt_long(argc, argv, "", long_options, &option_index)) != -1) {
+	switch (c) {
+	case OPT_CONFIG_FILE:
+	    config_file = optarg;
+	    break;
+	}
+	if (config_file)
+	    break;
+    }
+
+    if (config_file) {
+	status = read_config_file(pjsua.pool, config_file, &argc, &argv);
+	if (status != 0)
+	    return status;
+    }
+
+
+    cur_acc = &pjsua.acc[0];
+    cur_cred = &pjsua.cred_info[0];
+
+
+    /* Reinitialize and re-run getopt again, possibly with new arguments
+     * read from config file.
+     */
+    optind = 0;
+    while ((c=getopt_long(argc, argv, "", long_options, &option_index)) != -1) {
+	char *p;
+	pj_str_t tmp;
+	long lval;
+
+	switch (c) {
+
+	case OPT_LOG_FILE:
+	    pjsua.log_filename = optarg;
+	    break;
+
+	case OPT_LOG_LEVEL:
+	    c = pj_strtoul(pj_cstr(&tmp, optarg));
+	    if (c < 0 || c > 6) {
+		printf("Error: expecting integer value 0-6 for --log-level\n");
+		return PJ_EINVAL;
+	    }
+	    pj_log_set_level( c );
+	    break;
+
+	case OPT_APP_LOG_LEVEL:
+	    pjsua.app_log_level = pj_strtoul(pj_cstr(&tmp, optarg));
+	    if (pjsua.app_log_level < 0 || pjsua.app_log_level > 6) {
+		printf("Error: expecting integer value 0-6 for --app-log-level\n");
+		return PJ_EINVAL;
+	    }
+	    break;
+
+	case OPT_HELP:
+	    usage();
+	    return PJ_EINVAL;
+
+	case OPT_VERSION:   /* version */
+	    pj_dump_config();
+	    return PJ_EINVAL;
+
+	case OPT_NULL_AUDIO:
+	    pjsua.null_audio = 1;
+	    break;
+
+	case OPT_LOCAL_PORT:   /* local-port */
+	    lval = pj_strtoul(pj_cstr(&tmp, optarg));
+	    if (lval < 1 || lval > 65535) {
+		printf("Error: expecting integer value for --local-port\n");
+		return PJ_EINVAL;
+	    }
+	    pjsua.sip_port = (pj_uint16_t)lval;
+	    break;
+
+	case OPT_PROXY:   /* proxy */
+	    if (pjsua_verify_sip_url(optarg) != 0) {
+		printf("Error: invalid SIP URL '%s' in proxy argument\n", optarg);
+		return PJ_EINVAL;
+	    }
+	    cur_acc->proxy = pj_str(optarg);
+	    break;
+
+	case OPT_OUTBOUND_PROXY:   /* outbound proxy */
+	    if (pjsua_verify_sip_url(optarg) != 0) {
+		printf("Error: invalid SIP URL '%s' in outbound proxy argument\n", optarg);
+		return PJ_EINVAL;
+	    }
+	    pjsua.outbound_proxy = pj_str(optarg);
+	    break;
+
+	case OPT_REGISTRAR:   /* registrar */
+	    if (pjsua_verify_sip_url(optarg) != 0) {
+		printf("Error: invalid SIP URL '%s' in registrar argument\n", optarg);
+		return PJ_EINVAL;
+	    }
+	    cur_acc->reg_uri = pj_str(optarg);
+	    break;
+
+	case OPT_REG_TIMEOUT:   /* reg-timeout */
+	    cur_acc->reg_timeout = pj_strtoul(pj_cstr(&tmp,optarg));
+	    if (cur_acc->reg_timeout < 1 || cur_acc->reg_timeout > 3600) {
+		printf("Error: invalid value for --reg-timeout (expecting 1-3600)\n");
+		return PJ_EINVAL;
+	    }
+	    break;
+
+	case OPT_ID:   /* id */
+	    if (pjsua_verify_sip_url(optarg) != 0) {
+		printf("Error: invalid SIP URL '%s' in local id argument\n", optarg);
+		return PJ_EINVAL;
+	    }
+	    cur_acc->local_uri = pj_str(optarg);
+	    break;
+
+	case OPT_CONTACT:   /* contact */
+	    if (pjsua_verify_sip_url(optarg) != 0) {
+		printf("Error: invalid SIP URL '%s' in contact argument\n", optarg);
+		return PJ_EINVAL;
+	    }
+	    cur_acc->contact_uri = pj_str(optarg);
+	    break;
+
+	case OPT_NEXT_ACCOUNT: /* Add more account. */
+	    pjsua.acc_cnt++;
+	    cur_acc = &pjsua.acc[pjsua.acc_cnt - 1];
+	    break;
+
+	case OPT_USERNAME:   /* Default authentication user */
+	    if (pjsua.cred_count==0) pjsua.cred_count=1;
+	    cur_cred->username = pj_str(optarg);
+	    break;
+
+	case OPT_REALM:	    /* Default authentication realm. */
+	    if (pjsua.cred_count==0) pjsua.cred_count=1;
+	    cur_cred->realm = pj_str(optarg);
+	    break;
+
+	case OPT_PASSWORD:   /* authentication password */
+	    if (pjsua.cred_count==0) pjsua.cred_count=1;
+	    cur_cred->data_type = 0;
+	    cur_cred->data = pj_str(optarg);
+	    break;
+
+	case OPT_NEXT_CRED: /* Next credential */
+	    pjsua.cred_count++;
+	    cur_cred = &pjsua.cred_info[pjsua.cred_count - 1];
+	    break;
+
+	case OPT_USE_STUN1:   /* STUN server 1 */
+	    p = pj_ansi_strchr(optarg, ':');
+	    if (p) {
+		*p = '\0';
+		pjsua.stun_srv1 = pj_str(optarg);
+		pjsua.stun_port1 = pj_strtoul(pj_cstr(&tmp, p+1));
+		if (pjsua.stun_port1 < 1 || pjsua.stun_port1 > 65535) {
+		    printf("Error: expecting port number with option --use-stun1\n");
+		    return PJ_EINVAL;
+		}
+	    } else {
+		pjsua.stun_port1 = 3478;
+		pjsua.stun_srv1 = pj_str(optarg);
+	    }
+	    break;
+
+	case OPT_USE_STUN2:   /* STUN server 2 */
+	    p = pj_ansi_strchr(optarg, ':');
+	    if (p) {
+		*p = '\0';
+		pjsua.stun_srv2 = pj_str(optarg);
+		pjsua.stun_port2 = pj_strtoul(pj_cstr(&tmp,p+1));
+		if (pjsua.stun_port2 < 1 || pjsua.stun_port2 > 65535) {
+		    printf("Error: expecting port number with option --use-stun2\n");
+		    return PJ_EINVAL;
+		}
+	    } else {
+		pjsua.stun_port2 = 3478;
+		pjsua.stun_srv2 = pj_str(optarg);
+	    }
+	    break;
+
+	case OPT_ADD_BUDDY: /* Add to buddy list. */
+	    if (pjsua_verify_sip_url(optarg) != 0) {
+		printf("Error: invalid URL '%s' in --add-buddy option\n", optarg);
+		return -1;
+	    }
+	    if (pjsua.buddy_cnt == PJSUA_MAX_BUDDIES) {
+		printf("Error: too many buddies in buddy list.\n");
+		return -1;
+	    }
+	    pjsua.buddies[pjsua.buddy_cnt++].uri = pj_str(optarg);
+	    break;
+
+	case OPT_AUTO_PLAY:
+	    pjsua.auto_play = 1;
+	    break;
+
+	case OPT_AUTO_LOOP:
+	    pjsua.auto_loop = 1;
+	    break;
+
+	case OPT_AUTO_CONF:
+	    pjsua.auto_conf = 1;
+	    break;
+
+	case OPT_PLAY_FILE:
+	    pjsua.wav_file = optarg;
+	    break;
+
+	case OPT_AUTO_ANSWER:
+	    pjsua.auto_answer = my_atoi(optarg);
+	    if (pjsua.auto_answer < 100 || pjsua.auto_answer > 699) {
+		puts("Error: invalid code in --auto-answer (expecting 100-699");
+		return -1;
+	    }
+	    break;
+
+	case OPT_MAX_CALLS:
+	    pjsua.max_calls = my_atoi(optarg);
+	    if (pjsua.max_calls < 1 || pjsua.max_calls > 255) {
+		puts("Too many calls for max-calls (1-255)");
+		return -1;
+	    }
+	    break;
+	}
+    }
+
+    if (optind != argc) {
+	printf("Error: unknown options %s\n", argv[optind]);
+	return PJ_EINVAL;
+    }
+
+    return PJ_SUCCESS;
+}
+
+
+
+static void print_call(const char *title,
+		       int call_index, 
+		       char *buf, pj_size_t size)
+{
+    int len;
+    pjsip_inv_session *inv = pjsua.calls[call_index].inv;
+    pjsip_dialog *dlg = inv->dlg;
+    char userinfo[128];
+
+    /* Dump invite sesion info. */
+
+    len = pjsip_hdr_print_on(dlg->remote.info, userinfo, sizeof(userinfo));
+    if (len < 1)
+	pj_ansi_strcpy(userinfo, "<--uri too long-->");
+    else
+	userinfo[len] = '\0';
+    
+    len = pj_snprintf(buf, size, "%s[%s] %s",
+		      title,
+		      pjsua_inv_state_names[inv->state],
+		      userinfo);
+    if (len < 1 || len >= (int)size) {
+	pj_ansi_strcpy(buf, "<--uri too long-->");
+	len = 18;
+    } else
+	buf[len] = '\0';
+}
+
+static void dump_media_session(pjmedia_session *session)
+{
+    unsigned i;
+    pjmedia_session_info info;
+
+    pjmedia_session_get_info(session, &info);
+
+    for (i=0; i<info.stream_cnt; ++i) {
+	pjmedia_stream_stat strm_stat;
+	const char *rem_addr;
+	int rem_port;
+	const char *dir;
+
+	pjmedia_session_get_stream_stat(session, i, &strm_stat);
+	rem_addr = pj_inet_ntoa(info.stream_info[i].rem_addr.sin_addr);
+	rem_port = pj_ntohs(info.stream_info[i].rem_addr.sin_port);
+
+	if (info.stream_info[i].dir == PJMEDIA_DIR_ENCODING)
+	    dir = "sendonly";
+	else if (info.stream_info[i].dir == PJMEDIA_DIR_DECODING)
+	    dir = "recvonly";
+	else if (info.stream_info[i].dir == PJMEDIA_DIR_ENCODING_DECODING)
+	    dir = "sendrecv";
+	else
+	    dir = "inactive";
+
+	
+	PJ_LOG(3,(THIS_FILE, 
+		  "%s[Media strm#%d] %.*s, %s, peer=%s:%d",
+		  "               ",
+		  i,
+		  info.stream_info[i].fmt.encoding_name.slen,
+		  info.stream_info[i].fmt.encoding_name.ptr,
+		  dir,
+		  rem_addr, rem_port));
+	PJ_LOG(3,(THIS_FILE, 
+		  "%s tx {pkt=%u, bytes=%u} rx {pkt=%u, bytes=%u}",
+		  "                             ",
+		  strm_stat.enc.pkt, strm_stat.enc.bytes,
+		  strm_stat.dec.pkt, strm_stat.dec.bytes));
+
+    }
+}
+
+/*
+ * Dump application states.
+ */
+void pjsua_dump(void)
+{
+    char buf[128];
+    unsigned old_decor;
+
+    PJ_LOG(3,(THIS_FILE, "Start dumping application states:"));
+
+    old_decor = pj_log_get_decor();
+    pj_log_set_decor(old_decor & (PJ_LOG_HAS_NEWLINE | PJ_LOG_HAS_CR));
+
+    pjsip_endpt_dump(pjsua.endpt, 1);
+    pjmedia_endpt_dump(pjsua.med_endpt);
+    pjsip_tsx_layer_dump();
+    pjsip_ua_dump();
+
+
+    /* Dump all invite sessions: */
+    PJ_LOG(3,(THIS_FILE, "Dumping invite sessions:"));
+
+    if (pjsua.call_cnt == 0) {
+
+	PJ_LOG(3,(THIS_FILE, "  - no sessions -"));
+
+    } else {
+	int i;
+
+	for (i=0; i<pjsua.max_calls; ++i) {
+
+	    if (pjsua.calls[i].inv == NULL)
+		continue;
+
+	    print_call("  ", i, buf, sizeof(buf));
+	    PJ_LOG(3,(THIS_FILE, "%s", buf));
+
+	    if (pjsua.calls[i].session)
+		dump_media_session(pjsua.calls[i].session);
+	}
+    }
+
+    /* Dump presence status */
+    pjsua_pres_dump();
+
+    pj_log_set_decor(old_decor);
+    PJ_LOG(3,(THIS_FILE, "Dump complete"));
+}
+
+
+/*
+ * Load settings.
+ */
+pj_status_t pjsua_load_settings(const char *filename)
+{
+    int argc = 3;
+    char *argv[4] = { "pjsua", "--config-file", NULL, NULL};
+
+    argv[3] = (char*)filename;
+    return pjsua_parse_args(argc, argv);
+}
+
+
+/*
+ * Save account settings
+ */
+static void save_account_settings(int acc_index, pj_str_t *result)
+{
+    char line[128];
+    pjsua_acc *acc = &pjsua.acc[acc_index];
+
+    
+    pj_ansi_sprintf(line, "#\n# Account %d:\n#\n", acc_index);
+    pj_strcat2(result, line);
+
+
+    /* Identity */
+    if (acc->local_uri.slen) {
+	pj_ansi_sprintf(line, "--id %.*s\n", 
+			(int)acc->local_uri.slen, 
+			acc->local_uri.ptr);
+	pj_strcat2(result, line);
+    }
+
+    /* Registrar server */
+    if (acc->reg_uri.slen) {
+	pj_ansi_sprintf(line, "--registrar %.*s\n",
+			      (int)acc->reg_uri.slen,
+			      acc->reg_uri.ptr);
+	pj_strcat2(result, line);
+
+	pj_ansi_sprintf(line, "--reg-timeout %u\n",
+			      acc->reg_timeout);
+	pj_strcat2(result, line);
+    }
+
+
+    /* Proxy */
+    if (acc->proxy.slen) {
+	pj_ansi_sprintf(line, "--proxy %.*s\n",
+			      (int)acc->proxy.slen,
+			      acc->proxy.ptr);
+	pj_strcat2(result, line);
+    }
+}
+
+
+
+/*
+ * Dump settings.
+ */
+int pjsua_dump_settings(char *buf, pj_size_t max)
+{
+    int acc_index;
+    int i;
+    pj_str_t cfg;
+    char line[128];
+
+    cfg.ptr = buf;
+    cfg.slen = 0;
+
+
+    /* Logging. */
+    pj_strcat2(&cfg, "#\n# Logging options:\n#\n");
+    pj_ansi_sprintf(line, "--log-level %d\n",
+		    pjsua.log_level);
+    pj_strcat2(&cfg, line);
+
+    pj_ansi_sprintf(line, "--app-log-level %d\n",
+		    pjsua.app_log_level);
+    pj_strcat2(&cfg, line);
+
+    if (pjsua.log_filename) {
+	pj_ansi_sprintf(line, "--log-file %s\n",
+			pjsua.log_filename);
+	pj_strcat2(&cfg, line);
+    }
+
+
+    /* Save account settings. */
+    for (acc_index=0; acc_index < pjsua.acc_cnt; ++acc_index) {
+	
+	save_account_settings(acc_index, &cfg);
+
+	if (acc_index < pjsua.acc_cnt-1)
+	    pj_strcat2(&cfg, "--next-account\n");
+    }
+
+    /* Credentials. */
+    for (i=0; i<pjsua.cred_count; ++i) {
+
+	pj_ansi_sprintf(line, "#\n# Credential %d:\n#\n", i);
+	pj_strcat2(&cfg, line);
+
+	if (pjsua.cred_info[i].realm.slen) {
+	    pj_ansi_sprintf(line, "--realm %.*s\n",
+				  (int)pjsua.cred_info[i].realm.slen,
+				  pjsua.cred_info[i].realm.ptr);
+	    pj_strcat2(&cfg, line);
+	}
+
+	pj_ansi_sprintf(line, "--username %.*s\n",
+			      (int)pjsua.cred_info[i].username.slen,
+			      pjsua.cred_info[i].username.ptr);
+	pj_strcat2(&cfg, line);
+
+	pj_ansi_sprintf(line, "--password %.*s\n",
+			      (int)pjsua.cred_info[i].data.slen,
+			      pjsua.cred_info[i].data.ptr);
+	pj_strcat2(&cfg, line);
+
+	if (i < pjsua.cred_count-1)
+	    pj_strcat2(&cfg, "--next-cred\n");
+    }
+
+
+    pj_strcat2(&cfg, "#\n# Network settings:\n#\n");
+
+    /* Outbound proxy */
+    if (pjsua.outbound_proxy.slen) {
+	pj_ansi_sprintf(line, "--outbound %.*s\n",
+			      (int)pjsua.outbound_proxy.slen,
+			      pjsua.outbound_proxy.ptr);
+	pj_strcat2(&cfg, line);
+    }
+
+
+    /* Transport. */
+    pj_ansi_sprintf(line, "--local-port %d\n", pjsua.sip_port);
+    pj_strcat2(&cfg, line);
+
+
+    /* STUN */
+    if (pjsua.stun_port1) {
+	pj_ansi_sprintf(line, "--use-stun1 %.*s:%d\n",
+			(int)pjsua.stun_srv1.slen, 
+			pjsua.stun_srv1.ptr, 
+			pjsua.stun_port1);
+	pj_strcat2(&cfg, line);
+    }
+
+    if (pjsua.stun_port2) {
+	pj_ansi_sprintf(line, "--use-stun2 %.*s:%d\n",
+			(int)pjsua.stun_srv2.slen, 
+			pjsua.stun_srv2.ptr, 
+			pjsua.stun_port2);
+	pj_strcat2(&cfg, line);
+    }
+
+
+    pj_strcat2(&cfg, "#\n# Media settings:\n#\n");
+
+
+    /* Media */
+    if (pjsua.null_audio)
+	pj_strcat2(&cfg, "--null-audio\n");
+    if (pjsua.auto_play)
+	pj_strcat2(&cfg, "--auto-play\n");
+    if (pjsua.auto_loop)
+	pj_strcat2(&cfg, "--auto-loop\n");
+    if (pjsua.auto_conf)
+	pj_strcat2(&cfg, "--auto-conf\n");
+    if (pjsua.wav_file) {
+	pj_ansi_sprintf(line, "--play-file %s\n",
+			pjsua.wav_file);
+	pj_strcat2(&cfg, line);
+    }
+
+
+    pj_strcat2(&cfg, "#\n# User agent:\n#\n");
+
+    /* Auto-answer. */
+    if (pjsua.auto_answer != 0) {
+	pj_ansi_sprintf(line, "--auto-answer %d\n",
+			pjsua.auto_answer);
+	pj_strcat2(&cfg, line);
+    }
+
+    /* Max calls. */
+    pj_ansi_sprintf(line, "--max-calls %d\n",
+		    pjsua.max_calls);
+    pj_strcat2(&cfg, line);
+
+
+    pj_strcat2(&cfg, "#\n# Buddies:\n#\n");
+
+    /* Add buddies. */
+    for (i=0; i<pjsua.buddy_cnt; ++i) {
+	pj_ansi_sprintf(line, "--add-buddy %.*s\n",
+			      (int)pjsua.buddies[i].uri.slen,
+			      pjsua.buddies[i].uri.ptr);
+	pj_strcat2(&cfg, line);
+    }
+
+
+    *(cfg.ptr + cfg.slen) = '\0';
+    return cfg.slen;
+}
+
+/*
+ * Save settings.
+ */
+pj_status_t pjsua_save_settings(const char *filename)
+{
+    pj_str_t cfg;
+    pj_pool_t *pool;
+    FILE *fhnd;
+
+    /* Create pool for temporary buffer. */
+    pool = pj_pool_create(&pjsua.cp.factory, "settings", 4000, 0, NULL);
+    if (!pool)
+	return PJ_ENOMEM;
+
+
+    cfg.ptr = pj_pool_alloc(pool, 3800);
+    if (!cfg.ptr) {
+	pj_pool_release(pool);
+	return PJ_EBUG;
+    }
+
+
+    cfg.slen = pjsua_dump_settings(cfg.ptr, 3800);
+    if (cfg.slen < 1) {
+	pj_pool_release(pool);
+	return PJ_ENOMEM;
+    }
+
+
+    /* Write to file. */
+    fhnd = fopen(filename, "wt");
+    if (!fhnd) {
+	pj_pool_release(pool);
+	return pj_get_os_error();
+    }
+
+    fwrite(cfg.ptr, cfg.slen, 1, fhnd);
+    fclose(fhnd);
+
+    pj_pool_release(pool);
+    return PJ_SUCCESS;
+}
diff --git a/pjsip/src/pjsua-lib/pjsua_pres.c b/pjsip/src/pjsua-lib/pjsua_pres.c
new file mode 100644
index 00000000..9f307c6c
--- /dev/null
+++ b/pjsip/src/pjsua-lib/pjsua_pres.c
@@ -0,0 +1,504 @@
+/* $Id$ */
+/* 
+ * Copyright (C) 2003-2006 Benny Prijono <benny@prijono.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+#include <pjsua-lib/pjsua.h>
+
+/*
+ * pjsua_pres.c
+ *
+ * Presence related stuffs.
+ */
+
+#define THIS_FILE   "pjsua_pres.c"
+
+
+
+/* **************************************************************************
+ * THE FOLLOWING PART HANDLES SERVER SUBSCRIPTION
+ * **************************************************************************
+ */
+
+/* Proto */
+static pj_bool_t pres_on_rx_request(pjsip_rx_data *rdata);
+
+/* The module instance. */
+static pjsip_module mod_pjsua_pres = 
+{
+    NULL, NULL,				/* prev, next.		*/
+    { "mod-pjsua-pres", 14 },		/* Name.		*/
+    -1,					/* Id			*/
+    PJSIP_MOD_PRIORITY_APPLICATION,	/* Priority	        */
+    NULL,				/* load()		*/
+    NULL,				/* start()		*/
+    NULL,				/* stop()		*/
+    NULL,				/* unload()		*/
+    &pres_on_rx_request,		/* on_rx_request()	*/
+    NULL,				/* on_rx_response()	*/
+    NULL,				/* on_tx_request.	*/
+    NULL,				/* on_tx_response()	*/
+    NULL,				/* on_tsx_state()	*/
+
+};
+
+
+/* Callback called when *server* subscription state has changed. */
+static void pres_evsub_on_srv_state( pjsip_evsub *sub, pjsip_event *event)
+{
+    pjsua_srv_pres *uapres = pjsip_evsub_get_mod_data(sub, pjsua.mod.id);
+
+    PJ_UNUSED_ARG(event);
+
+    if (uapres) {
+	PJ_LOG(3,(THIS_FILE, "Server subscription to %s is %s",
+		  uapres->remote, pjsip_evsub_get_state_name(sub)));
+
+	if (pjsip_evsub_get_state(sub) == PJSIP_EVSUB_STATE_TERMINATED) {
+	    pjsip_evsub_set_mod_data(sub, pjsua.mod.id, NULL);
+	    pj_list_erase(uapres);
+	}
+    }
+}
+
+/* This is called when request is received. 
+ * We need to check for incoming SUBSCRIBE request.
+ */
+static pj_bool_t pres_on_rx_request(pjsip_rx_data *rdata)
+{
+    int acc_index;
+    pjsip_method *req_method = &rdata->msg_info.msg->line.req.method;
+    pjsua_srv_pres *uapres;
+    pjsip_evsub *sub;
+    pjsip_evsub_user pres_cb;
+    pjsip_tx_data *tdata;
+    pjsip_pres_status pres_status;
+    pjsip_dialog *dlg;
+    pj_status_t status;
+
+    if (pjsip_method_cmp(req_method, &pjsip_subscribe_method) != 0)
+	return PJ_FALSE;
+
+    /* Incoming SUBSCRIBE: */
+
+    /* Find which account for the incoming request. */
+    acc_index = pjsua_find_account_for_incoming(rdata);
+
+    /* Create UAS dialog: */
+    status = pjsip_dlg_create_uas( pjsip_ua_instance(), rdata, 
+				   &pjsua.acc[acc_index].contact_uri, 
+				   &dlg);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, 
+		     "Unable to create UAS dialog for subscription", 
+		     status);
+	return PJ_FALSE;
+    }
+
+    /* Init callback: */
+    pj_memset(&pres_cb, 0, sizeof(pres_cb));
+    pres_cb.on_evsub_state = &pres_evsub_on_srv_state;
+
+    /* Create server presence subscription: */
+    status = pjsip_pres_create_uas( dlg, &pres_cb, rdata, &sub);
+    if (status != PJ_SUCCESS) {
+	PJ_TODO(DESTROY_DIALOG);
+	pjsua_perror(THIS_FILE, "Unable to create server subscription", 
+		     status);
+	return PJ_FALSE;
+    }
+
+    /* Attach our data to the subscription: */
+    uapres = pj_pool_alloc(dlg->pool, sizeof(pjsua_srv_pres));
+    uapres->sub = sub;
+    uapres->remote = pj_pool_alloc(dlg->pool, PJSIP_MAX_URL_SIZE);
+    status = pjsip_uri_print(PJSIP_URI_IN_REQ_URI, dlg->remote.info->uri,
+			     uapres->remote, PJSIP_MAX_URL_SIZE);
+    if (status < 1)
+	pj_ansi_strcpy(uapres->remote, "<-- url is too long-->");
+    else
+	uapres->remote[status] = '\0';
+
+    pjsip_evsub_set_mod_data(sub, pjsua.mod.id, uapres);
+
+    /* Add server subscription to the list: */
+    pj_list_push_back(&pjsua.acc[acc_index].pres_srv_list, uapres);
+
+
+    /* Create and send 200 (OK) to the SUBSCRIBE request: */
+    status = pjsip_pres_accept(sub, rdata, 200, NULL);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to accept presence subscription", 
+		     status);
+	pj_list_erase(uapres);
+	return PJ_FALSE;
+    }
+
+
+    /* Set our online status: */
+    pj_memset(&pres_status, 0, sizeof(pres_status));
+    pres_status.info_cnt = 1;
+    pres_status.info[0].basic_open = pjsua.acc[acc_index].online_status;
+    //Both pjsua.local_uri and pjsua.contact_uri are enclosed in "<" and ">"
+    //causing XML parsing to fail.
+    //pres_status.info[0].contact = pjsua.local_uri;
+
+    pjsip_pres_set_status(sub, &pres_status);
+
+    /* Create and send the first NOTIFY to active subscription: */
+    status = pjsip_pres_notify( sub, PJSIP_EVSUB_STATE_ACTIVE, NULL,
+			        NULL, &tdata);
+    if (status == PJ_SUCCESS)
+	status = pjsip_pres_send_request( sub, tdata);
+
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to create/send NOTIFY", 
+		     status);
+	pj_list_erase(uapres);
+	return PJ_FALSE;
+    }
+
+
+    /* Done: */
+
+    return PJ_TRUE;
+}
+
+
+/* Refresh subscription (e.g. when our online status has changed) */
+static void refresh_server_subscription(int acc_index)
+{
+    pjsua_srv_pres *uapres;
+
+    uapres = pjsua.acc[acc_index].pres_srv_list.next;
+
+    while (uapres != &pjsua.acc[acc_index].pres_srv_list) {
+	
+	pjsip_pres_status pres_status;
+	pjsip_tx_data *tdata;
+
+	pjsip_pres_get_status(uapres->sub, &pres_status);
+	if (pres_status.info[0].basic_open != pjsua.acc[acc_index].online_status) {
+	    pres_status.info[0].basic_open = pjsua.acc[acc_index].online_status;
+	    pjsip_pres_set_status(uapres->sub, &pres_status);
+
+	    if (pjsua.quit_flag) {
+		pj_str_t reason = { "noresource", 10 };
+		if (pjsip_pres_notify(uapres->sub, 
+				      PJSIP_EVSUB_STATE_TERMINATED, NULL,
+				      &reason, &tdata)==PJ_SUCCESS)
+		{
+		    pjsip_pres_send_request(uapres->sub, tdata);
+		}
+	    } else {
+		if (pjsip_pres_current_notify(uapres->sub, &tdata)==PJ_SUCCESS)
+		    pjsip_pres_send_request(uapres->sub, tdata);
+	    }
+	}
+
+	uapres = uapres->next;
+    }
+}
+
+
+
+/* **************************************************************************
+ * THE FOLLOWING PART HANDLES CLIENT SUBSCRIPTION
+ * **************************************************************************
+ */
+
+/* Callback called when *client* subscription state has changed. */
+static void pjsua_evsub_on_state( pjsip_evsub *sub, pjsip_event *event)
+{
+    pjsua_buddy *buddy;
+
+    PJ_UNUSED_ARG(event);
+
+    buddy = pjsip_evsub_get_mod_data(sub, pjsua.mod.id);
+    if (buddy) {
+	PJ_LOG(3,(THIS_FILE, 
+		  "Presence subscription to %s is %s",
+		  buddy->uri.ptr, 
+		  pjsip_evsub_get_state_name(sub)));
+
+	if (pjsip_evsub_get_state(sub) == PJSIP_EVSUB_STATE_TERMINATED) {
+	    buddy->sub = NULL;
+	    buddy->status.info_cnt = 0;
+	    pjsip_evsub_set_mod_data(sub, pjsua.mod.id, NULL);
+	}
+    }
+}
+
+/* Callback called when we receive NOTIFY */
+static void pjsua_evsub_on_rx_notify(pjsip_evsub *sub, 
+				     pjsip_rx_data *rdata,
+				     int *p_st_code,
+				     pj_str_t **p_st_text,
+				     pjsip_hdr *res_hdr,
+				     pjsip_msg_body **p_body)
+{
+    pjsua_buddy *buddy;
+
+    buddy = pjsip_evsub_get_mod_data(sub, pjsua.mod.id);
+    if (buddy) {
+	/* Update our info. */
+	pjsip_pres_get_status(sub, &buddy->status);
+
+	if (buddy->status.info_cnt) {
+	    PJ_LOG(3,(THIS_FILE, "%s is %s",
+		      buddy->uri.ptr,
+		      (buddy->status.info[0].basic_open?"online":"offline")));
+	} else {
+	    PJ_LOG(3,(THIS_FILE, "No presence info for %s",
+		      buddy->uri.ptr));
+	}
+    }
+
+    /* The default is to send 200 response to NOTIFY.
+     * Just leave it there..
+     */
+    PJ_UNUSED_ARG(rdata);
+    PJ_UNUSED_ARG(p_st_code);
+    PJ_UNUSED_ARG(p_st_text);
+    PJ_UNUSED_ARG(res_hdr);
+    PJ_UNUSED_ARG(p_body);
+}
+
+
+/* Event subscription callback. */
+static pjsip_evsub_user pres_callback = 
+{
+    &pjsua_evsub_on_state,  
+
+    NULL,   /* on_tsx_state: don't care about transaction state. */
+
+    NULL,   /* on_rx_refresh: don't care about SUBSCRIBE refresh, unless 
+	     * we want to authenticate 
+	     */
+
+    &pjsua_evsub_on_rx_notify,
+
+    NULL,   /* on_client_refresh: Use default behaviour, which is to 
+	     * refresh client subscription. */
+
+    NULL,   /* on_server_timeout: Use default behaviour, which is to send 
+	     * NOTIFY to terminate. 
+	     */
+};
+
+
+/* It does what it says.. */
+static void subscribe_buddy_presence(unsigned index)
+{
+    int acc_index;
+    pjsip_dialog *dlg;
+    pjsip_tx_data *tdata;
+    pj_status_t status;
+
+    acc_index = pjsua.buddies[index].acc_index;
+
+    status = pjsip_dlg_create_uac( pjsip_ua_instance(), 
+				   &pjsua.acc[acc_index].local_uri,
+				   &pjsua.acc[acc_index].contact_uri,
+				   &pjsua.buddies[index].uri,
+				   NULL, &dlg);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to create dialog", 
+		     status);
+	return;
+    }
+
+    status = pjsip_pres_create_uac( dlg, &pres_callback, 
+				    &pjsua.buddies[index].sub);
+    if (status != PJ_SUCCESS) {
+	pjsua.buddies[index].sub = NULL;
+	pjsua_perror(THIS_FILE, "Unable to create presence client", 
+		     status);
+	return;
+    }
+
+    pjsip_evsub_set_mod_data(pjsua.buddies[index].sub, pjsua.mod.id,
+			     &pjsua.buddies[index]);
+
+    status = pjsip_pres_initiate(pjsua.buddies[index].sub, -1, &tdata);
+    if (status != PJ_SUCCESS) {
+	pjsua.buddies[index].sub = NULL;
+	pjsua_perror(THIS_FILE, "Unable to create initial SUBSCRIBE", 
+		     status);
+	return;
+    }
+
+    status = pjsip_pres_send_request(pjsua.buddies[index].sub, tdata);
+    if (status != PJ_SUCCESS) {
+	pjsua.buddies[index].sub = NULL;
+	pjsua_perror(THIS_FILE, "Unable to send initial SUBSCRIBE", 
+		     status);
+	return;
+    }
+
+    PJ_TODO(DESTROY_DIALOG_ON_ERROR);
+}
+
+
+/* It does what it says... */
+static void unsubscribe_buddy_presence(unsigned index)
+{
+    pjsip_tx_data *tdata;
+    pj_status_t status;
+
+    if (pjsua.buddies[index].sub == NULL)
+	return;
+
+    if (pjsip_evsub_get_state(pjsua.buddies[index].sub) == 
+	PJSIP_EVSUB_STATE_TERMINATED)
+    {
+	pjsua.buddies[index].sub = NULL;
+	return;
+    }
+
+    status = pjsip_pres_initiate( pjsua.buddies[index].sub, 0, &tdata);
+    if (status == PJ_SUCCESS)
+	status = pjsip_pres_send_request( pjsua.buddies[index].sub, tdata );
+
+    if (status == PJ_SUCCESS) {
+
+	//pjsip_evsub_set_mod_data(pjsua.buddies[index].sub, pjsua.mod.id,
+	//				 NULL);
+	//pjsua.buddies[index].sub = NULL;
+
+    } else {
+	pjsua_perror(THIS_FILE, "Unable to unsubscribe presence", 
+		     status);
+    }
+}
+
+
+/* It does what it says.. */
+static void refresh_client_subscription(void)
+{
+    int i;
+
+    for (i=0; i<pjsua.buddy_cnt; ++i) {
+
+	if (pjsua.buddies[i].monitor && !pjsua.buddies[i].sub) {
+	    subscribe_buddy_presence(i);
+
+	} else if (!pjsua.buddies[i].monitor && pjsua.buddies[i].sub) {
+	    unsubscribe_buddy_presence(i);
+
+	}
+    }
+}
+
+
+/*
+ * Init presence
+ */
+pj_status_t pjsua_pres_init()
+{
+    pj_status_t status;
+
+    status = pjsip_endpt_register_module( pjsua.endpt, &mod_pjsua_pres);
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to register pjsua presence module", 
+		     status);
+    }
+
+    return status;
+}
+
+/*
+ * Refresh presence
+ */
+void pjsua_pres_refresh(int acc_index)
+{
+    refresh_client_subscription();
+    refresh_server_subscription(acc_index);
+}
+
+
+/*
+ * Shutdown presence.
+ */
+void pjsua_pres_shutdown(void)
+{
+    int acc_index;
+    int i;
+
+    for (acc_index=0; acc_index<pjsua.acc_cnt; ++acc_index) {
+	pjsua.acc[acc_index].online_status = 0;
+    }
+
+    for (i=0; i<pjsua.buddy_cnt; ++i) {
+	pjsua.buddies[i].monitor = 0;
+    }
+
+    for (acc_index=0; acc_index<pjsua.acc_cnt; ++acc_index) {
+	pjsua_pres_refresh(acc_index);
+    }
+}
+
+/*
+ * Dump presence status.
+ */
+void pjsua_pres_dump(void)
+{
+    int acc_index;
+    int i;
+
+    PJ_LOG(3,(THIS_FILE, "Dumping pjsua server subscriptions:"));
+    for (acc_index=0; acc_index < pjsua.acc_cnt; ++acc_index) {
+
+	PJ_LOG(3,(THIS_FILE, "  %.*s",
+		  (int)pjsua.acc[acc_index].local_uri.slen,
+		  pjsua.acc[acc_index].local_uri.ptr));
+
+	if (pj_list_empty(&pjsua.acc[acc_index].pres_srv_list)) {
+	    PJ_LOG(3,(THIS_FILE, "  - none - "));
+	} else {
+	    struct pjsua_srv_pres *uapres;
+
+	    uapres = pjsua.acc[acc_index].pres_srv_list.next;
+	    while (uapres != &pjsua.acc[acc_index].pres_srv_list) {
+	    
+		PJ_LOG(3,(THIS_FILE, "    %10s %s",
+			  pjsip_evsub_get_state_name(uapres->sub),
+			  uapres->remote));
+
+		uapres = uapres->next;
+	    }
+	}
+    }
+
+    PJ_LOG(3,(THIS_FILE, "Dumping pjsua client subscriptions:"));
+    if (pjsua.buddy_cnt == 0) {
+	PJ_LOG(3,(THIS_FILE, "  - no buddy list - "));
+    } else {
+	for (i=0; i<pjsua.buddy_cnt; ++i) {
+
+	    if (pjsua.buddies[i].sub) {
+		PJ_LOG(3,(THIS_FILE, "  %10s %s",
+			  pjsip_evsub_get_state_name(pjsua.buddies[i].sub),
+			  pjsua.buddies[i].uri.ptr));
+	    } else {
+		PJ_LOG(3,(THIS_FILE, "  %10s %s",
+			  "(null)",
+			  pjsua.buddies[i].uri.ptr));
+	    }
+	}
+    }
+}
+
diff --git a/pjsip/src/pjsua-lib/pjsua_reg.c b/pjsip/src/pjsua-lib/pjsua_reg.c
new file mode 100644
index 00000000..e18f7cc8
--- /dev/null
+++ b/pjsip/src/pjsua-lib/pjsua_reg.c
@@ -0,0 +1,167 @@
+/* $Id$ */
+/* 
+ * Copyright (C) 2003-2006 Benny Prijono <benny@prijono.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+#include <pjsua-lib/pjsua.h>
+
+
+/*
+ * pjsua_reg.c
+ *
+ * Client registration handler.
+ */
+
+#define THIS_FILE   "pjsua_reg.c"
+
+
+/*
+ * This callback is called by pjsip_regc when outgoing register
+ * request has completed.
+ */
+static void regc_cb(struct pjsip_regc_cbparam *param)
+{
+
+    pjsua_acc *acc = param->token;
+
+    /*
+     * Print registration status.
+     */
+    if (param->status!=PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "SIP registration error", 
+		     param->status);
+	pjsip_regc_destroy(acc->regc);
+	acc->regc = NULL;
+	
+    } else if (param->code < 0 || param->code >= 300) {
+	PJ_LOG(2, (THIS_FILE, "SIP registration failed, status=%d (%s)", 
+		   param->code, 
+		   pjsip_get_status_text(param->code)->ptr));
+	pjsip_regc_destroy(acc->regc);
+	acc->regc = NULL;
+
+    } else if (PJSIP_IS_STATUS_IN_CLASS(param->code, 200)) {
+
+	if (param->expiration < 1) {
+	    pjsip_regc_destroy(acc->regc);
+	    acc->regc = NULL;
+	    PJ_LOG(3,(THIS_FILE, "%s: unregistration success",
+		      acc->local_uri.ptr));
+	} else {
+	    PJ_LOG(3, (THIS_FILE, 
+		       "%s: registration success, status=%d (%s), "
+		       "will re-register in %d seconds", 
+		       acc->local_uri.ptr,
+		       param->code,
+		       pjsip_get_status_text(param->code)->ptr,
+		       param->expiration));
+	}
+
+    } else {
+	PJ_LOG(4, (THIS_FILE, "SIP registration updated status=%d", param->code));
+    }
+
+    acc->reg_last_err = param->status;
+    acc->reg_last_code = param->code;
+
+    pjsua_ui_regc_on_state_changed(acc->index);
+}
+
+
+/*
+ * Update registration. If renew is false, then unregistration will be performed.
+ */
+void pjsua_regc_update(int acc_index, pj_bool_t renew)
+{
+    pj_status_t status;
+    pjsip_tx_data *tdata;
+
+    if (renew) {
+	if (pjsua.acc[acc_index].regc == NULL) {
+	    status = pjsua_regc_init(acc_index);
+	    if (status != PJ_SUCCESS) {
+		pjsua_perror(THIS_FILE, "Unable to create registration", 
+			     status);
+		return;
+	    }
+	}
+	status = pjsip_regc_register(pjsua.acc[acc_index].regc, 1, &tdata);
+    } else {
+	if (pjsua.acc[acc_index].regc == NULL) {
+	    PJ_LOG(3,(THIS_FILE, "Currently not registered"));
+	    return;
+	}
+	status = pjsip_regc_unregister(pjsua.acc[acc_index].regc, &tdata);
+    }
+
+    if (status == PJ_SUCCESS)
+	status = pjsip_regc_send( pjsua.acc[acc_index].regc, tdata );
+
+    if (status != PJ_SUCCESS) {
+	pjsua_perror(THIS_FILE, "Unable to create/send REGISTER", 
+		     status);
+    } else {
+	PJ_LOG(3,(THIS_FILE, "%s sent",
+	         (renew? "Registration" : "Unregistration")));
+    }
+}
+
+/*
+ * Initialize client registration.
+ */
+pj_status_t pjsua_regc_init(int acc_index)
+{
+    pj_status_t status;
+
+    /* initialize SIP registration if registrar is configured */
+    if (pjsua.acc[acc_index].reg_uri.slen) {
+
+	status = pjsip_regc_create( pjsua.endpt, 
+				    &pjsua.acc[acc_index], 
+				    &regc_cb, 
+				    &pjsua.acc[acc_index].regc);
+
+	if (status != PJ_SUCCESS) {
+	    pjsua_perror(THIS_FILE, "Unable to create client registration", 
+			 status);
+	    return status;
+	}
+
+
+	status = pjsip_regc_init( pjsua.acc[acc_index].regc, 
+				  &pjsua.acc[acc_index].reg_uri, 
+				  &pjsua.acc[acc_index].local_uri, 
+				  &pjsua.acc[acc_index].local_uri,
+				  1, &pjsua.acc[acc_index].contact_uri, 
+				  pjsua.acc[acc_index].reg_timeout);
+	if (status != PJ_SUCCESS) {
+	    pjsua_perror(THIS_FILE, 
+			 "Client registration initialization error", 
+			 status);
+	    return status;
+	}
+
+	pjsip_regc_set_credentials( pjsua.acc[acc_index].regc, 
+				    pjsua.cred_count, 
+				    pjsua.cred_info );
+
+	pjsip_regc_set_route_set( pjsua.acc[acc_index].regc, 
+				  &pjsua.acc[acc_index].route_set );
+    }
+
+    return PJ_SUCCESS;
+}
+