initial checkin

Check in contents of upstream 1.4.2 tarball, exclude generated files.

9 files changed, 3701 insertions, 0 deletions

diff --git a/src/sdp/Makefile.am b/src/sdp/Makefile.am
new file mode 100644
index 0000000..ea3340c
--- /dev/null
+++ b/src/sdp/Makefile.am
@@ -0,0 +1,27 @@
+AM_CPPFLAGS = \
+	-Wall \
+	-I$(top_srcdir)/src\
+	$(XML2_CFLAGS)
+
+AM_YFLAGS = -p yysdp -d
+AM_LFLAGS = -Pyysdp -olex.yy.c -i
+
+# This target is only for testing the parser in isolation
+# noinst_PROGRAMS = sdpparse
+
+# sdpparse_SOURCES = main.cpp
+
+# sdpparse_LDADD = $(top_builddir)/src/util.o\
+# 	$(top_builddir)/src/sdp/libsdpparser.a\
+# 	$(top_builddir)/src/parser/sip_body.o
+
+noinst_LIBRARIES = libsdpparser.a
+
+
+libsdpparser_a_SOURCES =\
+        sdp.cpp\
+        sdp_parse_ctrl.cpp\
+	sdp_parser.yxx\
+	sdp_scanner.lxx\
+        sdp.h\
+        sdp_parse_ctrl.h
diff --git a/src/sdp/sdp.cpp b/src/sdp/sdp.cpp
new file mode 100644
index 0000000..7d5de3b
--- /dev/null
+++ b/src/sdp/sdp.cpp
@@ -0,0 +1,806 @@
+/*
+    Copyright (C) 2005-2009  Michel de Boer <michel@twinklephone.com>
+
+    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 <algorithm>
+#include <assert.h>
+#include <cstdlib>
+#include <iostream>
+#include "protocol.h"
+#include "sdp_parse_ctrl.h"
+#include "sdp.h"
+#include "util.h"
+#include "parser/hdr_warning.h"
+#include "parser/parameter.h"
+#include "audits/memman.h"
+
+using namespace std;
+
+string sdp_ntwk_type2str(t_sdp_ntwk_type n) {
+	switch(n) {
+	case SDP_NTWK_NULL:	return "NULL";
+	case SDP_NTWK_IN:	return "IN";
+	default:
+		assert(false);
+	}
+}
+
+t_sdp_ntwk_type str2sdp_ntwk_type(string s) {
+	if (s == "IN") return SDP_NTWK_IN;
+
+	throw (t_sdp_syntax_error("unknown network type: " + s));
+}
+
+string sdp_addr_type2str(t_sdp_addr_type a) {
+	switch(a) {
+	case SDP_ADDR_NULL:	return "NULL";
+	case SDP_ADDR_IP4:	return "IP4";
+	case SDP_ADDR_IP6:	return "IP6";
+	default:
+		assert(false);
+	}
+}
+
+t_sdp_addr_type str2sdp_addr_type(string s) {
+	if (s == "IP4") return SDP_ADDR_IP4;
+	if (s == "IP6") return SDP_ADDR_IP6;
+
+	throw (t_sdp_syntax_error("unknown address type: " + s));
+}
+
+string sdp_transport2str(t_sdp_transport t) {
+	switch(t) {
+	case SDP_TRANS_RTP:	return "RTP/AVP";
+	case SDP_TRANS_UDP:	return "udp";
+	default:
+		assert(false);
+	}
+}
+
+t_sdp_transport str2sdp_transport(string s) {
+	if (s == "RTP/AVP") return SDP_TRANS_RTP;
+	if (s == "udp") return SDP_TRANS_UDP;
+
+	// Other transports are not recognized and are mapped to other.
+	return SDP_TRANS_OTHER;
+}
+
+t_sdp_media_type str2sdp_media_type(string s) {
+	if (s == "audio") return SDP_AUDIO;
+	if (s == "video") return SDP_VIDEO;
+	return SDP_OTHER;
+}
+
+string sdp_media_type2str(t_sdp_media_type m) {
+	switch(m) {
+	case SDP_AUDIO:		return "audio";
+	case SDP_VIDEO:		return "video";
+	default:
+		assert(false);
+	}
+}
+
+string get_rtpmap(unsigned format, t_audio_codec codec) {
+	string rtpmap;
+	
+	rtpmap = int2str(format);
+	rtpmap += ' ';
+
+	switch(codec) {
+	case CODEC_G711_ULAW:
+		rtpmap += SDP_RTPMAP_G711_ULAW;
+		break;
+	case CODEC_G711_ALAW:
+		rtpmap += SDP_RTPMAP_G711_ALAW;
+		break;
+	case CODEC_GSM:
+		rtpmap += SDP_RTPMAP_GSM;
+		break;
+	case CODEC_SPEEX_NB:
+		rtpmap += SDP_RTPMAP_SPEEX_NB;
+		break;
+	case CODEC_SPEEX_WB:
+		rtpmap += SDP_RTPMAP_SPEEX_WB;
+		break;
+	case CODEC_SPEEX_UWB:
+		rtpmap += SDP_RTPMAP_SPEEX_UWB;
+		break;
+	case CODEC_ILBC:
+		rtpmap += SDP_RTPMAP_ILBC;
+		break;
+	case CODEC_G726_16:
+		rtpmap += SDP_RTPMAP_G726_16;
+		break;
+	case CODEC_G726_24:
+		rtpmap += SDP_RTPMAP_G726_24;
+		break;
+	case CODEC_G726_32:
+		rtpmap += SDP_RTPMAP_G726_32;
+		break;
+	case CODEC_G726_40:
+		rtpmap += SDP_RTPMAP_G726_40;
+		break;
+	case CODEC_TELEPHONE_EVENT:
+		rtpmap += SDP_RTPMAP_TELEPHONE_EV;
+		break;
+	default:
+		assert(false);
+	}
+
+	return rtpmap;
+}
+
+string sdp_media_direction2str(t_sdp_media_direction d) {
+	switch(d) {
+	case SDP_INACTIVE:	return "inactive";
+	case SDP_SENDONLY:	return "sendonly";
+	case SDP_RECVONLY:	return "recvonly";
+	case SDP_SENDRECV:	return "sendrecv";
+	default:
+		assert(false);
+	}
+}
+
+///////////////////////////////////
+// class t_sdp_origin
+///////////////////////////////////
+
+t_sdp_origin::t_sdp_origin() {
+	network_type = SDP_NTWK_NULL;
+	address_type = SDP_ADDR_NULL;
+}
+
+t_sdp_origin::t_sdp_origin(string _username, string _session_id,
+		           string _session_version, string _address) :
+		username(_username),
+		session_id(_session_id),
+		session_version(_session_version),
+		address(_address)
+{
+	network_type = SDP_NTWK_IN;
+	address_type = SDP_ADDR_IP4;
+}
+
+string t_sdp_origin::encode(void) const {
+	string s;
+
+	s = "o=";
+	s += username;
+	s += ' ' + session_id;
+	s += ' ' + session_version;
+	s += ' ' + sdp_ntwk_type2str(network_type);
+	s += ' ' + sdp_addr_type2str(address_type);
+	s += ' ' + address;
+	s += CRLF;
+
+	return s;
+}
+
+
+///////////////////////////////////
+// class t_sdp_connection
+///////////////////////////////////
+
+t_sdp_connection::t_sdp_connection() {
+	network_type = SDP_NTWK_NULL;
+}
+
+t_sdp_connection::t_sdp_connection(string _address) :
+		address(_address)
+{
+	network_type = SDP_NTWK_IN;
+	address_type = SDP_ADDR_IP4;
+}
+
+string t_sdp_connection::encode(void) const {
+	string s;
+
+	s = "c=";
+	s += sdp_ntwk_type2str(network_type);
+	s += ' ' + sdp_addr_type2str(address_type);
+	s += ' ' + address;
+	s += CRLF;
+
+	return s;
+}
+
+
+///////////////////////////////////
+// class t_sdp_attr
+///////////////////////////////////
+
+t_sdp_attr::t_sdp_attr(string _name) {
+	name = _name;
+}
+
+t_sdp_attr::t_sdp_attr(string _name, string _value) {
+	name = _name;
+	value = _value;
+}
+
+string t_sdp_attr::encode(void) const {
+	string s;
+
+	s = "a=";
+	s += name;
+
+	if (value != "") {
+		s += ':' + value;
+	}
+	
+	s += CRLF;
+
+	return s;
+}
+
+
+///////////////////////////////////
+// class t_sdp_media
+///////////////////////////////////
+
+t_sdp_media::t_sdp_media() {
+	port = 0;
+	format_dtmf = 0;
+}
+
+t_sdp_media::t_sdp_media(t_sdp_media_type _media_type,
+			 unsigned short _port, const list<t_audio_codec> &_formats,
+			 unsigned short _format_dtmf,
+			 const map<t_audio_codec, unsigned short> &ac2format)
+{
+	media_type = sdp_media_type2str(_media_type);
+	port = _port;
+	transport = sdp_transport2str(SDP_TRANS_RTP);
+	format_dtmf = _format_dtmf;
+
+	for (list<t_audio_codec>::const_iterator i = _formats.begin();
+	     i != _formats.end(); i++)
+	{
+		map<t_audio_codec, unsigned short>::const_iterator it;
+		it = ac2format.find(*i);
+		assert(it != ac2format.end());
+		add_format(it->second, *i);
+	}
+
+	if (format_dtmf > 0) {
+		add_format(format_dtmf, CODEC_TELEPHONE_EVENT);
+	}
+}
+
+string t_sdp_media::encode(void) const {
+	string s;
+
+	s = "m=";
+	s += media_type;
+	s += ' ' + int2str(port);
+	s += ' ' + transport;
+
+	// Encode media formats. Note that only one of the format lists
+	// will be populated depending on the media type.
+	
+	// Numeric formats.
+	for (list<unsigned short>::const_iterator i = formats.begin();
+	     i != formats.end(); ++i)
+	{
+		s += ' ' + int2str(*i);
+	}
+	
+	// Alpha numeric formats.
+	for (list<string>::const_iterator i = alpha_num_formats.begin();
+	     i != alpha_num_formats.end(); ++i)
+	{
+		s += ' ' + *i;
+	}
+
+	s += CRLF;
+
+	// Connection information.
+	if (connection.network_type != SDP_NTWK_NULL) {
+		s += connection.encode();
+	}
+
+	// Attributes.
+	for (list<t_sdp_attr>::const_iterator i = attributes.begin();
+	     i != attributes.end(); ++i)
+	{
+		s += i->encode();
+	}
+
+	return s;
+}
+
+void t_sdp_media::add_format(unsigned short f, t_audio_codec codec) {
+	formats.push_back(f);
+
+	// RFC 3264 5.1
+	// All media descriptions SHOULD contain an rtpmap
+	string rtpmap = get_rtpmap(f, codec);
+	attributes.push_back(t_sdp_attr("rtpmap", rtpmap));
+
+	// RFC 2833 3.9
+	// Add fmtp parameter
+	if (format_dtmf > 0 && f == format_dtmf) {
+		string fmtp = int2str(f);
+		fmtp += ' ';
+		fmtp += "0-15";
+		attributes.push_back(t_sdp_attr("fmtp", fmtp));
+	}
+}
+
+t_sdp_attr *t_sdp_media::get_attribute(const string &name) {
+	for (list<t_sdp_attr>::iterator i = attributes.begin();
+	     i != attributes.end(); i++)
+	{
+		if (cmp_nocase(i->name, name) == 0) return &(*i);
+	}
+
+	// Attribute does not exist
+	return NULL;
+}
+
+list<t_sdp_attr *> t_sdp_media::get_attributes(const string &name) {
+	list<t_sdp_attr *> l;
+
+	for (list<t_sdp_attr>::iterator i = attributes.begin();
+	     i != attributes.end(); i++)
+	{
+		if (cmp_nocase(i->name, name) == 0) l.push_back(&(*i));
+	}
+
+	return l;
+}
+
+t_sdp_media_direction t_sdp_media::get_direction(void) const {
+	t_sdp_attr *a;
+
+	t_sdp_media *self = const_cast<t_sdp_media *>(this);
+
+	a = self->get_attribute("inactive");
+	if (a) return SDP_INACTIVE;
+
+	a = self->get_attribute("sendonly");
+	if (a) return SDP_SENDONLY;
+
+	a = self->get_attribute("recvonly");
+	if (a) return SDP_RECVONLY;
+
+	return SDP_SENDRECV;
+}
+
+t_sdp_media_type t_sdp_media::get_media_type(void) const {
+	return str2sdp_media_type(media_type);
+}
+
+t_sdp_transport t_sdp_media::get_transport(void) const {
+	return str2sdp_transport(transport);
+}
+
+///////////////////////////////////
+// class t_sdp
+///////////////////////////////////
+
+t_sdp::t_sdp() : t_sip_body(), version(0) 
+{}
+
+t_sdp::t_sdp(const string &user, const string &sess_id, const string &sess_version, 
+	     const string &user_host, const string &media_host, unsigned short media_port,
+	     const list<t_audio_codec> &formats, unsigned short format_dtmf,
+	     const map<t_audio_codec, unsigned short> &ac2format) :
+	     	t_sip_body(),
+	     	version(0),
+		origin(user, sess_id, sess_version, user_host),
+		connection(media_host)
+{
+	media.push_back(t_sdp_media(SDP_AUDIO, media_port, formats, format_dtmf,
+				ac2format));
+}
+
+t_sdp::t_sdp(const string &user, const string &sess_id, const string &sess_version, 
+		const string &user_host, const string &media_host) :
+			t_sip_body(),
+			version(0),
+			origin(user, sess_id, sess_version, user_host),
+			connection(media_host)
+{}
+
+void t_sdp::add_media(const t_sdp_media &m) {
+	media.push_back(m);
+}
+
+string t_sdp::encode(void) const {
+	string s;
+
+	s = "v=" + int2str(version) + CRLF;
+	s += origin.encode();
+
+	if (session_name == "") {
+		// RFC 3264 5
+		// Session name may no be empty. Recommende is '-'
+		s += "s=-";
+		s += CRLF;
+	} else {
+		s += "s=" + session_name + CRLF;
+	}
+
+	if (connection.network_type != SDP_NTWK_NULL) {
+		s += connection.encode();
+	}
+
+	// RFC 3264 5
+	// Time parameter should be 0 0
+	s += "t=0 0";
+	s += CRLF;
+
+	for (list<t_sdp_attr>::const_iterator i = attributes.begin();
+	     i != attributes.end(); i++)
+	{
+		s += i->encode();
+	}
+
+	for (list<t_sdp_media>::const_iterator i = media.begin();
+	     i != media.end(); i++)
+	{
+		s += i->encode();
+	}
+
+	return s;
+}
+
+t_sip_body *t_sdp::copy(void) const {
+	t_sdp *s = new t_sdp(*this);
+	MEMMAN_NEW(s);
+	return s;
+}
+
+t_body_type t_sdp::get_type(void) const {
+	return BODY_SDP;
+}
+
+t_media t_sdp::get_media(void) const {
+	return t_media("application", "sdp");
+}
+
+bool t_sdp::is_supported(int &warn_code, string &warn_text) const {
+	warn_text = "";
+
+	if (version != 0) {
+		warn_code = W_399_MISCELLANEOUS;
+		warn_text = "SDP version ";
+		warn_text += int2str(version);
+		warn_text += " not supported";
+		return false;
+	}
+
+	const t_sdp_media *m = get_first_media(SDP_AUDIO);
+
+	// Connection information must be present at the session level
+	// and/or the media level
+	if (connection.network_type == SDP_NTWK_NULL) {
+		if (m == NULL || m->connection.network_type == SDP_NTWK_NULL) {
+			warn_code = W_399_MISCELLANEOUS;
+			warn_text = "c-line missing";
+			return false;
+		}
+	} else {
+		// Only Internet is supported
+		if (connection.network_type != SDP_NTWK_IN) {
+			warn_code = W_300_INCOMPATIBLE_NWK_PROT;
+			return false;
+		}
+
+		// Only IPv4 is supported
+		if (connection.address_type != SDP_ADDR_IP4) {
+			warn_code = W_301_INCOMPATIBLE_ADDR_FORMAT;
+			return false;
+		}
+	}
+	
+	// There must be at least 1 audio stream with a non-zero port value
+	if (m == NULL && !media.empty()) {
+		warn_code = W_304_MEDIA_TYPE_NOT_AVAILABLE;
+		warn_text = "Valid media stream for audio is missing";
+		return false;
+	}
+	
+	// RFC 3264 5, RFC 3725 flow IV
+	// There may be 0 media streams
+	if (media.empty()) {
+		return true;
+	}
+
+	// Check connection information on media level
+	if (m->connection.network_type != SDP_NTWK_NULL &&
+	    m->connection.address_type != SDP_ADDR_IP4) {
+		warn_code = W_301_INCOMPATIBLE_ADDR_FORMAT;
+		return false;
+	}
+
+	if (m->get_transport() != SDP_TRANS_RTP) {
+		warn_code = W_302_INCOMPATIBLE_TRANS_PROT;
+		return false;
+	}
+
+	t_sdp_media *m2 = const_cast<t_sdp_media *>(m);
+	const t_sdp_attr *a = m2->get_attribute("ptime");
+	if (a) {
+		unsigned short p = atoi(a->value.c_str());
+		if (p < MIN_PTIME) {
+			warn_code = W_306_ATTRIBUTE_NOT_UNDERSTOOD;
+			warn_text = "Attribute 'ptime' too small. must be >= ";
+			warn_text += int2str(MIN_PTIME);
+			return false;
+		}
+
+		if (p > MAX_PTIME) {
+			warn_code = W_306_ATTRIBUTE_NOT_UNDERSTOOD;
+			warn_text = "Attribute 'ptime' too big. must be <= ";
+			warn_text += int2str(MAX_PTIME);
+			return false;
+		}
+
+	}
+
+	return true;
+}
+
+string t_sdp::get_rtp_host(t_sdp_media_type media_type) const {
+	const t_sdp_media *m = get_first_media(media_type);
+	assert(m != NULL);
+
+	// If the media line has its own connection information, then
+	// take the host information from there.
+	if (m->connection.network_type == SDP_NTWK_IN) {
+		return m->connection.address;
+	}
+
+	// The host information must be in the session connection info
+	assert(connection.network_type == SDP_NTWK_IN);
+	return connection.address;
+}
+
+unsigned short t_sdp::get_rtp_port(t_sdp_media_type media_type) const {
+	const t_sdp_media *m = get_first_media(media_type);
+	assert(m != NULL);
+
+	return m->port;
+}
+
+list<unsigned short> t_sdp::get_codecs(t_sdp_media_type media_type) const {
+	const t_sdp_media *m = get_first_media(media_type);
+	assert(m != NULL);
+
+	return m->formats;
+}
+
+string t_sdp::get_codec_description(t_sdp_media_type media_type,
+		unsigned short codec) const
+{
+	t_sdp_media *m = const_cast<t_sdp_media *>(get_first_media(media_type));
+	assert(m != NULL);
+
+	const list<t_sdp_attr *> attrs = m->get_attributes("rtpmap");
+	if (attrs.empty()) return "";
+
+	for (list<t_sdp_attr *>::const_iterator i = attrs.begin();
+	     i != attrs.end(); i++)
+	{
+		vector<string> l = split_ws((*i)->value);
+		if (atoi(l.front().c_str()) == codec) {
+			return l.back();
+		}
+	}
+
+	return "";
+}
+
+t_audio_codec t_sdp::get_rtpmap_codec(const string &rtpmap) const {
+	if (rtpmap.empty()) return CODEC_NULL;
+	
+	vector<string> rtpmap_elems = split(rtpmap, '/');
+	if (rtpmap_elems.size() < 2) {
+		// RFC 2327	
+		// The rtpmap should at least contain the encoding name
+		// and sample rate
+		return CODEC_UNSUPPORTED;
+	}
+		
+	string codec_name = trim(rtpmap_elems[0]);
+	int sample_rate = atoi(trim(rtpmap_elems[1]).c_str());
+	
+	if (cmp_nocase(codec_name, SDP_AC_NAME_G711_ULAW) == 0 && sample_rate == 8000) {
+		return CODEC_G711_ULAW;
+	} else if (cmp_nocase(codec_name, SDP_AC_NAME_G711_ALAW) == 0 && sample_rate == 8000) {
+		return CODEC_G711_ALAW;
+	} else if (cmp_nocase(codec_name, SDP_AC_NAME_GSM) == 0 && sample_rate == 8000) {
+		return CODEC_GSM;
+	} else if (cmp_nocase(codec_name, SDP_AC_NAME_SPEEX) == 0 && sample_rate == 8000) {
+		return CODEC_SPEEX_NB;
+	} else if (cmp_nocase(codec_name, SDP_AC_NAME_SPEEX) == 0 && sample_rate == 16000) {
+		return CODEC_SPEEX_WB;
+	} else if (cmp_nocase(codec_name, SDP_AC_NAME_SPEEX) == 0 && sample_rate == 32000) {
+		return CODEC_SPEEX_UWB;
+	} else if (cmp_nocase(codec_name, SDP_AC_NAME_ILBC) == 0 && sample_rate == 8000) {
+		return CODEC_ILBC;
+	} else if (cmp_nocase(codec_name, SDP_AC_NAME_G726_16) == 0 && sample_rate == 8000) {
+		return CODEC_G726_16;
+	} else if (cmp_nocase(codec_name, SDP_AC_NAME_G726_24) == 0 && sample_rate == 8000) {
+		return CODEC_G726_24;
+	} else if (cmp_nocase(codec_name, SDP_AC_NAME_G726_32) == 0 && sample_rate == 8000) {
+		return CODEC_G726_32;
+	} else if (cmp_nocase(codec_name, SDP_AC_NAME_G726_40) == 0 && sample_rate == 8000) {
+		return CODEC_G726_40;
+	} else if (cmp_nocase(codec_name, SDP_AC_NAME_TELEPHONE_EV) == 0) {
+		return CODEC_TELEPHONE_EVENT;
+	}
+	
+	return CODEC_UNSUPPORTED;
+}
+
+t_audio_codec t_sdp::get_codec(t_sdp_media_type media_type,
+		unsigned short codec) const
+{
+	string rtpmap = get_codec_description(media_type, codec);
+	
+	// If there is no rtpmap description then use the static
+	// payload definition as defined by RFC 3551
+	if (rtpmap.empty()) {
+		switch(codec) {
+		case SDP_FORMAT_G711_ULAW:
+			return CODEC_G711_ULAW;
+		case SDP_FORMAT_G711_ALAW:
+			return CODEC_G711_ALAW;
+		case SDP_FORMAT_GSM:
+			return CODEC_GSM;
+		default:
+			return CODEC_UNSUPPORTED;
+		}
+	}
+	
+	// Use the rtpmap description to map the payload number
+	// to a codec
+	return get_rtpmap_codec(rtpmap);
+}
+
+t_sdp_media_direction t_sdp::get_direction(t_sdp_media_type media_type) const {
+	const t_sdp_media *m = get_first_media(media_type);
+	assert(m != NULL);
+
+	return m->get_direction();
+}
+
+string t_sdp::get_fmtp(t_sdp_media_type media_type, unsigned short codec) const {
+	t_sdp_media *m = const_cast<t_sdp_media *>(get_first_media(media_type));
+	assert(m != NULL);
+
+	const list<t_sdp_attr *> attrs = m->get_attributes("fmtp");
+	if (attrs.empty()) return "";
+
+	for (list<t_sdp_attr *>::const_iterator i = attrs.begin();
+	     i != attrs.end(); i++)
+	{
+		vector<string> l = split_ws((*i)->value);
+		if (atoi(l.front().c_str()) == codec) {
+			return l.back();
+		}
+	}
+
+	return "";
+}
+
+int t_sdp::get_fmtp_int_param(t_sdp_media_type media_type, unsigned short codec,
+			const string param) const
+{
+	string fmtp = get_fmtp(media_type, codec);
+	if (fmtp.empty()) return -1;
+	
+	int value;
+	list<t_parameter> l = str2param_list(fmtp);
+	list<t_parameter>::const_iterator it = find(l.begin(), l.end(), t_parameter(param, ""));
+	if (it != l.end()) {
+		value = atoi(it->value.c_str());
+	} else {
+		value = -1;
+	}
+	
+	return value;
+}
+
+unsigned short t_sdp::get_ptime(t_sdp_media_type media_type) const {
+	t_sdp_media *m = const_cast<t_sdp_media *>(get_first_media(media_type));
+	assert(m != NULL);
+
+	const t_sdp_attr *a = m->get_attribute("ptime");
+	if (!a) return 0;
+	return atoi(a->value.c_str());
+}
+
+bool t_sdp::get_zrtp_support(t_sdp_media_type media_type) const {
+	t_sdp_media *m = const_cast<t_sdp_media *>(get_first_media(media_type));
+	assert(m != NULL);
+	
+	const t_sdp_attr *a = m->get_attribute("zrtp");
+	if (!a) return false;
+	return true;
+}
+
+void t_sdp::set_ptime(t_sdp_media_type media_type, unsigned short ptime) {
+	t_sdp_media *m = const_cast<t_sdp_media *>(get_first_media(media_type));
+	assert(m != NULL);
+
+	t_sdp_attr a("ptime", int2str(ptime));
+	m->attributes.push_back(a);
+}
+
+void t_sdp::set_direction(t_sdp_media_type media_type, t_sdp_media_direction direction) {
+	t_sdp_media *m = const_cast<t_sdp_media *>(get_first_media(media_type));
+	assert(m != NULL);
+
+	t_sdp_attr a(sdp_media_direction2str(direction));
+	m->attributes.push_back(a);
+}
+
+void t_sdp::set_fmtp(t_sdp_media_type media_type, unsigned short codec, const string &fmtp) {
+	t_sdp_media *m = const_cast<t_sdp_media *>(get_first_media(media_type));
+	assert(m != NULL);
+	
+	string s = int2str(codec);
+	s += ' ';
+	s += fmtp;
+	t_sdp_attr a("fmtp", s);
+	m->attributes.push_back(a);
+}
+
+void t_sdp::set_fmtp_int_param(t_sdp_media_type media_type, unsigned short codec,
+			const string &param, int value)
+{
+	string fmtp(param);
+	fmtp += '=';
+	fmtp += int2str(value);
+	set_fmtp(media_type, codec, fmtp);
+}
+
+void t_sdp::set_zrtp_support(t_sdp_media_type media_type) {
+	t_sdp_media *m = const_cast<t_sdp_media *>(get_first_media(media_type));
+	assert(m != NULL);
+	
+	t_sdp_attr a("zrtp");
+	m->attributes.push_back(a);
+}
+
+const t_sdp_media *t_sdp::get_first_media(t_sdp_media_type media_type) const {
+	for (list<t_sdp_media>::const_iterator i = media.begin();
+	     i != media.end(); i++)
+	{
+		if (i->get_media_type() == media_type && i->port != 0) {
+			return &(*i);
+		}
+	}
+
+	return NULL;
+}
+
+bool t_sdp::local_ip_check(void) const {
+	if (origin.address == AUTO_IP4_ADDRESS) return false;
+	
+	if (connection.address == AUTO_IP4_ADDRESS) return false;
+	
+	for (list<t_sdp_media>::const_iterator it = media.begin(); it != media.end(); ++it) {
+		if (it->connection.address == AUTO_IP4_ADDRESS) return false;
+	}
+	
+	return true;
+}
diff --git a/src/sdp/sdp.h b/src/sdp/sdp.h
new file mode 100644
index 0000000..92edebe
--- /dev/null
+++ b/src/sdp/sdp.h
@@ -0,0 +1,295 @@
+/*
+    Copyright (C) 2005-2009  Michel de Boer <michel@twinklephone.com>
+
+    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
+*/
+
+// Session description
+
+#ifndef _H_SDP
+#define _H_SDP
+
+#include <list>
+#include <map>
+#include <string>
+#include "audio/audio_codecs.h"
+#include "parser/sip_body.h"
+
+/** User name to be put in o= line of SDP */
+#define SDP_O_USER		"twinkle"
+
+// Audio codec formats
+#define SDP_FORMAT_G711_ULAW	0
+#define SDP_FORMAT_GSM		3
+#define SDP_FORMAT_G711_ALAW	8
+
+// rtpmap values
+#define SDP_RTPMAP_G711_ULAW	"PCMU/8000"
+#define SDP_RTPMAP_GSM		"GSM/8000"
+#define SDP_RTPMAP_G711_ALAW	"PCMA/8000"
+#define SDP_RTPMAP_SPEEX_NB	"speex/8000"
+#define SDP_RTPMAP_SPEEX_WB	"speex/16000"
+#define SDP_RTPMAP_SPEEX_UWB	"speex/32000"
+#define SDP_RTPMAP_ILBC		"iLBC/8000"
+#define SDP_RTPMAP_G726_16	"G726-16/8000"
+#define SDP_RTPMAP_G726_24	"G726-24/8000"
+#define SDP_RTPMAP_G726_32	"G726-32/8000"
+#define SDP_RTPMAP_G726_40	"G726-40/8000"
+#define SDP_RTPMAP_TELEPHONE_EV	"telephone-event/8000"
+
+// Audio codec names
+#define SDP_AC_NAME_G711_ULAW		"PCMU"
+#define SDP_AC_NAME_G711_ALAW		"PCMA"
+#define SDP_AC_NAME_GSM			"GSM"
+#define SDP_AC_NAME_SPEEX		"speex"
+#define SDP_AC_NAME_ILBC		"iLBC"
+#define SDP_AC_NAME_G726_16		"G726-16"
+#define SDP_AC_NAME_G726_24		"G726-24"
+#define SDP_AC_NAME_G726_32		"G726-32"
+#define SDP_AC_NAME_G726_40		"G726-40"
+#define SDP_AC_NAME_TELEPHONE_EV	"telephone-event"
+
+// Check on fmtp parameter values
+#define VALID_ILBC_MODE(mode) ((mode) == 20 || (mode == 30))
+
+using namespace std;
+
+enum t_sdp_ntwk_type {
+	SDP_NTWK_NULL,
+	SDP_NTWK_IN
+};
+
+string sdp_ntwk_type2str(t_sdp_ntwk_type n);
+t_sdp_ntwk_type str2sdp_ntwk_type(string s);
+
+
+enum t_sdp_addr_type {
+	SDP_ADDR_NULL,
+	SDP_ADDR_IP4,
+	SDP_ADDR_IP6
+};
+
+string sdp_addr_type2str(t_sdp_addr_type a);
+t_sdp_addr_type str2sdp_addr_type(string s);
+
+
+/** Transport protocol */
+enum t_sdp_transport {
+	SDP_TRANS_RTP,		/**< RTP/AVP */
+	SDP_TRANS_UDP,		/**< UDP */
+	SDP_TRANS_OTHER		/**< Another protocol not yet supported */
+};
+
+string sdp_transport2str(t_sdp_transport t);
+t_sdp_transport str2sdp_transport(string s);
+
+
+enum t_sdp_media_direction {
+	SDP_INACTIVE,
+	SDP_SENDONLY,
+	SDP_RECVONLY,
+	SDP_SENDRECV
+};
+
+string sdp_media_direction2str(t_sdp_media_direction d);
+
+
+enum t_sdp_media_type {
+	SDP_AUDIO,
+	SDP_VIDEO,
+	SDP_OTHER
+};
+
+t_sdp_media_type str2sdp_media_type(string s);
+string sdp_media_type2str(t_sdp_media_type m);
+
+
+class t_sdp_origin {
+public:
+	string			username;
+	string			session_id;
+	string			session_version;
+	t_sdp_ntwk_type		network_type;
+	t_sdp_addr_type		address_type;
+	string			address;
+
+	t_sdp_origin();
+	t_sdp_origin(string _username, string _session_id,
+		     string _session_version, string _address);
+
+	string encode(void) const;
+};
+
+class t_sdp_connection {
+public:
+	t_sdp_ntwk_type		network_type;
+	t_sdp_addr_type		address_type;
+	string			address;
+
+	t_sdp_connection();
+	t_sdp_connection(string _address);
+	string encode(void) const;
+};
+
+class t_sdp_attr {
+public:
+	string			name;
+	string			value;
+
+	t_sdp_attr(string _name);
+	t_sdp_attr(string _name, string _value);
+	string encode(void) const;
+};
+
+/** 
+ * Media definition.
+ * The data from an m= line and associated a= lines.
+ */
+class t_sdp_media {
+private:
+	/** Dynamic payload type for DTMF */
+	unsigned short		format_dtmf;
+
+public:
+	/** The media type, e.g. audio, video */
+	string			media_type;
+	
+	/** Port to receive media */
+	unsigned short		port;
+	
+	/** Transport protocol, e.g. RTP/AVP */
+	string			transport;
+	
+	/** 
+	 * @name Media formats 
+	 * Depending on the media type, formats are in numeric format or
+	 * alpha numeric format. Only one of the following formats will
+	 * be populated.
+	 */
+	//@{
+	/** Media formats in numeric form, i.e. audio codecs */
+	list<unsigned short>	formats;
+	
+	/** Media formats in alpha numeric form. */
+	list<string>		alpha_num_formats;
+	//@}
+	
+	/** Optional connection information if not specified on global level. */
+	t_sdp_connection	connection;
+	
+	/** Attributes (a= lines) */
+	list <t_sdp_attr>	attributes;
+
+	t_sdp_media();
+	t_sdp_media(t_sdp_media_type _media_type,
+		    unsigned short _port, const list<t_audio_codec> &_formats,
+	            unsigned short _format_dtmf, 
+	            const map<t_audio_codec, unsigned short> &ac2format);
+
+	string encode(void) const;
+	void add_format(unsigned short f, t_audio_codec codec);
+	t_sdp_attr *get_attribute(const string &name);
+	list<t_sdp_attr *>get_attributes(const string &name);
+	t_sdp_media_direction get_direction(void) const;
+	t_sdp_media_type get_media_type(void) const;
+	t_sdp_transport get_transport(void) const;
+};
+
+class t_sdp : public t_sip_body {
+public:
+	unsigned short		version;
+	t_sdp_origin		origin;
+	string			session_name;
+	t_sdp_connection	connection;
+	list<t_sdp_attr>	attributes;
+	list<t_sdp_media>	media;
+
+	t_sdp();
+
+	// Create SDP with a single audio media stream
+	t_sdp(const string &user, const string &sess_id, const string &sess_version, 
+	      const string &user_host, const string &media_host, unsigned short media_port,
+	      const list<t_audio_codec> &formats, unsigned short format_dtmf,
+	      const map<t_audio_codec, unsigned short> &ac2format);
+
+	// Create SDP without media streams
+	t_sdp(const string &user, const string &sess_id, const string &sess_version, 
+		const string &user_host, const string &media_host);
+
+	// Add media stream
+	void add_media(const t_sdp_media &m);
+
+	string encode(void) const;
+	t_sip_body *copy(void) const;
+	t_body_type get_type(void) const;
+	t_media get_media(void) const;
+
+	// Return true if the current SDP is supported:
+	// version is 0
+	// 1 audio stream RTP
+	// IN IP4 addressing
+	// connection at session level only
+	// If false is returned, then a warning code and text is returned.
+	bool is_supported(int &warn_code, string &warn_text) const;
+
+	// Get/set codec/rtp info for first media stream having a non-zero
+	// value for the port of the given media type
+	string get_rtp_host(t_sdp_media_type media_type) const;
+	unsigned short get_rtp_port(t_sdp_media_type media_type) const;
+	list<unsigned short> get_codecs(t_sdp_media_type media_type) const;
+
+	// Get codec description from rtpmap
+	string get_codec_description(t_sdp_media_type media_type,
+			unsigned short codec) const;
+	t_audio_codec get_rtpmap_codec(const string &rtpmap) const;
+	t_audio_codec get_codec(t_sdp_media_type media_type,
+			unsigned short codec) const;
+	t_sdp_media_direction get_direction(t_sdp_media_type media_type) const;
+	
+	// Get ftmp attribute
+	string get_fmtp(t_sdp_media_type media_type, unsigned short codec) const;
+	
+	// Get a specific parameter from fmtp, assuming the fmtp string is a list
+	// of paramter=value strings separated by semi-colons
+	// Returns -1 on failure
+	int get_fmtp_int_param(t_sdp_media_type media_type, unsigned short codec,
+			const string param) const;
+
+	// Get ptime. Returns 0 if ptime is not present
+	unsigned short get_ptime(t_sdp_media_type media_type) const;
+	
+	bool get_zrtp_support(t_sdp_media_type media_type) const;
+	
+	void set_ptime(t_sdp_media_type media_type, unsigned short ptime);
+	void set_direction(t_sdp_media_type media_type, t_sdp_media_direction direction);
+	void set_fmtp(t_sdp_media_type media_type, unsigned short codec, const string &fmtp);
+	void set_fmtp_int_param(t_sdp_media_type media_type, unsigned short codec,
+			const string &param, int value);
+	void set_zrtp_support(t_sdp_media_type media_type);
+
+	// Returns a pointer to the first media stream in the list of media
+	// streams having a non-zero port value for the give media type.
+	// Returns NULL if no such media stream can be found.
+	const t_sdp_media *get_first_media(t_sdp_media_type media_type) const;
+	
+	/**
+	 * Check if all local IP address are correctly filled in. This
+	 * check is an integrity check to help debugging the auto IP
+	 * discover feature.
+	 */
+	virtual bool local_ip_check(void) const;
+};
+
+#endif
diff --git a/src/sdp/sdp_parse_ctrl.cpp b/src/sdp/sdp_parse_ctrl.cpp
new file mode 100644
index 0000000..44d0886
--- /dev/null
+++ b/src/sdp/sdp_parse_ctrl.cpp
@@ -0,0 +1,70 @@
+/*
+    Copyright (C) 2005-2009  Michel de Boer <michel@twinklephone.com>
+
+    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 "sdp_parse_ctrl.h"
+#include "audits/memman.h"
+
+// Interface to Bison
+extern int yysdpparse(void);
+
+// Interface to Flex
+struct yy_buffer_state;
+extern struct yy_buffer_state *yysdp_scan_string(const char *);
+extern void yysdp_delete_buffer(struct yy_buffer_state *);
+
+t_mutex t_sdp_parser::mtx_parser;
+t_sdp_parser::t_context t_sdp_parser::context = t_sdp_parser::X_INITIAL;
+t_sdp *t_sdp_parser::sdp = NULL;
+
+t_sdp *t_sdp_parser::parse(const string &s) {
+	int ret;
+	struct yy_buffer_state *b;
+	
+	t_mutex_guard guard(mtx_parser);
+	
+	sdp = new t_sdp();
+	MEMMAN_NEW(sdp);
+	
+	// The SDP body should end with a CRLF. Some implementations
+	// do not send this last CRLF. Allow this deviation by adding
+	// the last CRLF if it is missing.
+	char last_char = s.at(s.size()-1);
+	if (last_char == '\n' || last_char == '\r') {
+		// The SDP parser allows \r, \r\n and \n as CRLF
+		b = yysdp_scan_string(s.c_str());
+	} else {
+		// Last CRLF is missing.
+		b = yysdp_scan_string((s + "\r\n").c_str());
+	}
+	
+	ret = yysdpparse();
+	yysdp_delete_buffer(b);
+
+	if (ret != 0) {
+		MEMMAN_DELETE(sdp);
+		delete sdp;
+		sdp = NULL;
+		throw ret;
+	}
+
+	return sdp;
+}
+
+t_sdp_syntax_error::t_sdp_syntax_error(const string &e) {
+	error = e;
+}
diff --git a/src/sdp/sdp_parse_ctrl.h b/src/sdp/sdp_parse_ctrl.h
new file mode 100644
index 0000000..aff1481
--- /dev/null
+++ b/src/sdp/sdp_parse_ctrl.h
@@ -0,0 +1,63 @@
+/*
+    Copyright (C) 2005-2009  Michel de Boer <michel@twinklephone.com>
+
+    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
+*/
+
+// Parser control
+
+#ifndef _SDP_PARSE_CTRL_H
+#define _SDP_PARSE_CTRL_H
+
+#include "sdp.h"
+#include "threads/mutex.h"
+
+#define SDP		t_sdp_parser::sdp
+
+#define CTX_INITIAL	(t_sdp_parser::context = t_sdp_parser::X_INITIAL)
+#define CTX_SAFE	(t_sdp_parser::context = t_sdp_parser::X_SAFE)
+#define CTX_NUM		(t_sdp_parser::context = t_sdp_parser::X_NUM)
+#define CTX_LINE	(t_sdp_parser::context = t_sdp_parser::X_LINE)
+
+// The t_sdp_parser controls the direction of the scanner/parser
+// process and it stores the results from the parser.
+class t_sdp_parser {
+private:
+	/** Mutex to synchronize parse operations */
+	static t_mutex	mtx_parser;
+public:
+enum t_context {
+	X_INITIAL,	// Initial context
+	X_SAFE,		// Safe context
+	X_NUM,		// Number context
+	X_LINE,		// Whole line context
+};
+
+	static t_context	context;   // Scan context
+	static t_sdp		*sdp;      // SDP that has been parsed
+
+	// Parse string s. Throw int exception when parsing fails.
+	static t_sdp *parse(const string &s);
+
+};
+
+// Error that can be thrown as exception
+class t_sdp_syntax_error {
+public:
+	string error;
+	t_sdp_syntax_error(const string &e);
+};
+
+#endif
diff --git a/src/sdp/sdp_parser.h b/src/sdp/sdp_parser.h
new file mode 100644
index 0000000..40c0bb8
--- /dev/null
+++ b/src/sdp/sdp_parser.h
@@ -0,0 +1,98 @@
+/* A Bison parser, made by GNU Bison 2.3.  */
+
+/* Skeleton interface for Bison's Yacc-like parsers in C
+
+   Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006
+   Free Software Foundation, Inc.
+
+   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, 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., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.  */
+
+/* As a special exception, you may create a larger work that contains
+   part or all of the Bison parser skeleton and distribute that work
+   under terms of your choice, so long as that work isn't itself a
+   parser generator using the skeleton or a modified version thereof
+   as a parser skeleton.  Alternatively, if you modify or redistribute
+   the parser skeleton itself, you may (at your option) remove this
+   special exception, which will cause the skeleton and the resulting
+   Bison output files to be licensed under the GNU General Public
+   License without this special exception.
+
+   This special exception was added by the Free Software Foundation in
+   version 2.2 of Bison.  */
+
+/* Tokens.  */
+#ifndef YYTOKENTYPE
+# define YYTOKENTYPE
+   /* Put the tokens into the symbol table, so that GDB and other debuggers
+      know about them.  */
+   enum yytokentype {
+     T_NUM = 258,
+     T_TOKEN = 259,
+     T_SAFE = 260,
+     T_LINE = 261,
+     T_CRLF = 262,
+     T_LINE_VERSION = 263,
+     T_LINE_ORIGIN = 264,
+     T_LINE_SESSION_NAME = 265,
+     T_LINE_CONNECTION = 266,
+     T_LINE_ATTRIBUTE = 267,
+     T_LINE_MEDIA = 268,
+     T_LINE_UNKNOWN = 269,
+     T_NULL = 270
+   };
+#endif
+/* Tokens.  */
+#define T_NUM 258
+#define T_TOKEN 259
+#define T_SAFE 260
+#define T_LINE 261
+#define T_CRLF 262
+#define T_LINE_VERSION 263
+#define T_LINE_ORIGIN 264
+#define T_LINE_SESSION_NAME 265
+#define T_LINE_CONNECTION 266
+#define T_LINE_ATTRIBUTE 267
+#define T_LINE_MEDIA 268
+#define T_LINE_UNKNOWN 269
+#define T_NULL 270
+
+
+
+
+#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
+typedef union YYSTYPE
+#line 50 "sdp_parser.yxx"
+{
+	int			yysdpt_int;
+	string			*yysdpt_str;
+	t_sdp_ntwk_type		yysdpt_ntwk_type;
+	t_sdp_addr_type		yysdpt_addr_type;
+	t_sdp_connection	*yysdpt_connection;
+	list<t_sdp_attr>	*yysdpt_attributes;
+	t_sdp_attr		*yysdpt_attribute;
+	t_sdp_media		*yysdpt_media;
+	list<string>		*yysdpt_token_list;
+}
+/* Line 1529 of yacc.c.  */
+#line 91 "sdp_parser.h"
+	YYSTYPE;
+# define yystype YYSTYPE /* obsolescent; will be withdrawn */
+# define YYSTYPE_IS_DECLARED 1
+# define YYSTYPE_IS_TRIVIAL 1
+#endif
+
+extern YYSTYPE yysdplval;
+
diff --git a/src/sdp/sdp_parser.yxx b/src/sdp/sdp_parser.yxx
new file mode 100644
index 0000000..5926f09
--- /dev/null
+++ b/src/sdp/sdp_parser.yxx
@@ -0,0 +1,294 @@
+/*
+    Copyright (C) 2005-2009  Michel de Boer <michel@twinklephone.com>
+
+    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 <algorithm>
+#include <cstdio>
+#include <string>
+#include "sdp_parse_ctrl.h"
+#include "sdp.h"
+#include "util.h"
+#include "audits/memman.h"
+
+using namespace std;
+
+extern int yysdplex(void);
+void yysdperror(const char *s);
+%}
+
+// The %debug option causes a problem with the %destructor options later on.
+// The bison compilor generates undefined symbols:
+//
+//   parser.y: In function `void yysymprint(FILE*, int, yystype)':
+//   parser.y:0: error: `null' undeclared (first use this function)
+//
+// So if you need to debug, then outcomment the %destructor first. This will
+// do no harm to your debugging, it only will cause memory leaks during
+// error handling.
+//
+// %debug
+
+
+%expect 2
+/* See below for the expected shift/reduce conflicts. */
+
+%union {
+	int			yysdpt_int;
+	string			*yysdpt_str;
+	t_sdp_ntwk_type		yysdpt_ntwk_type;
+	t_sdp_addr_type		yysdpt_addr_type;
+	t_sdp_connection	*yysdpt_connection;
+	list<t_sdp_attr>	*yysdpt_attributes;
+	t_sdp_attr		*yysdpt_attribute;
+	t_sdp_media		*yysdpt_media;
+	list<string>		*yysdpt_token_list;
+}
+
+%token <yysdpt_int>	T_NUM
+%token <yysdpt_str>	T_TOKEN
+%token <yysdpt_str>	T_SAFE
+%token <yysdpt_str>	T_LINE
+
+%token			T_CRLF
+
+%token			T_LINE_VERSION
+%token			T_LINE_ORIGIN
+%token			T_LINE_SESSION_NAME
+%token			T_LINE_CONNECTION
+%token			T_LINE_ATTRIBUTE
+%token			T_LINE_MEDIA
+%token			T_LINE_UNKNOWN
+
+// The token T_NULL is never returned by the scanner.
+%token			T_NULL
+
+%destructor { MEMMAN_DELETE($$); delete $$; }	T_TOKEN
+%destructor { MEMMAN_DELETE($$); delete $$; }	T_SAFE
+%destructor { MEMMAN_DELETE($$); delete $$; }	T_LINE
+
+%type <yysdpt_addr_type>	address_type
+%type <yysdpt_connection>	connection
+%type <yysdpt_ntwk_type>	network_type
+%type <yysdpt_attributes>	attributes
+%type <yysdpt_attribute>	attribute
+%type <yysdpt_attribute>	attribute2
+%type <yysdpt_media>		media
+%type <yysdpt_str>		transport
+%type <yysdpt_token_list>	formats
+
+%destructor { MEMMAN_DELETE($$); delete $$; }	connection
+%destructor { MEMMAN_DELETE($$); delete $$; }	attributes
+%destructor { MEMMAN_DELETE($$); delete $$; }	attribute
+%destructor { MEMMAN_DELETE($$); delete $$; }	attribute2
+%destructor { MEMMAN_DELETE($$); delete $$; }	media
+%destructor { MEMMAN_DELETE($$); delete $$; }	transport
+%destructor { MEMMAN_DELETE($$); delete $$; }	formats
+
+%%
+
+/* The unknown_lines cause an expected shift/reduce conflict */
+sdp_body:	  version
+		  origin
+		  session_name
+		  unknown_lines
+		  sess_connection
+		  unknown_lines
+		  sess_attributes
+		  media_list {
+		  	/* Parsing stops here. Remaining text is
+			 * not parsed.
+			 */
+		  	YYACCEPT; }
+		| error T_NULL {
+			/* KLUDGE to avoid memory leak in bison.
+			 * See the SIP parser for an explanation.
+			 */
+			YYABORT;
+		}
+;
+
+version:	  T_LINE_VERSION { CTX_NUM; } T_NUM { CTX_INITIAL; }
+		  T_CRLF {
+			SDP->version = $3; }
+;
+
+origin:		  T_LINE_ORIGIN { CTX_SAFE; } T_SAFE { CTX_INITIAL; }
+		  T_TOKEN T_TOKEN network_type address_type T_TOKEN T_CRLF {
+			SDP->origin.username = *$3;
+			SDP->origin.session_id = *$5;
+			SDP->origin.session_version = *$6;
+			SDP->origin.network_type = $7;
+			SDP->origin.address_type = $8;
+			SDP->origin.address = *$9;
+			MEMMAN_DELETE($3); delete $3;
+			MEMMAN_DELETE($5); delete $5;
+			MEMMAN_DELETE($6); delete $6;
+			MEMMAN_DELETE($9); delete $9; }
+;
+
+network_type:	  T_TOKEN { try {
+				$$ = str2sdp_ntwk_type(*$1);
+				MEMMAN_DELETE($1); delete $1;
+			    }
+			    catch (t_sdp_syntax_error) {
+			    	// Invalid network type.
+				// Set network type to NULL. This way the message
+				// will not be discarded and the error can be
+				// handled on the SIP level (error response or
+				// call tear down).
+			    	MEMMAN_DELETE($1); delete $1;
+				$$ = SDP_NTWK_NULL;
+			    } }
+;
+
+address_type:	  T_TOKEN { try {
+				$$ = str2sdp_addr_type(*$1);
+				MEMMAN_DELETE($1); delete $1;
+			    }
+			    catch (t_sdp_syntax_error) {
+			    	// Invalid address type
+			    	MEMMAN_DELETE($1); delete $1;
+				$$ = SDP_ADDR_NULL;
+			    } }
+;
+
+session_name:	  T_LINE_SESSION_NAME { CTX_LINE; } T_LINE
+		  { CTX_INITIAL; } T_CRLF {
+			SDP->session_name = *$3;
+			MEMMAN_DELETE($3); delete $3; }
+;
+
+sess_connection:  connection {
+			SDP->connection = *$1;
+			MEMMAN_DELETE($1); delete $1; }
+;
+
+connection:	  /* empty */	{ $$ = new t_sdp_connection(); MEMMAN_NEW($$); }
+		| T_LINE_CONNECTION network_type address_type T_TOKEN
+		  T_CRLF {
+			$$ = new t_sdp_connection();
+			MEMMAN_NEW($$);
+			$$->network_type = $2;
+			$$->address_type = $3;
+			$$->address = *$4;
+			MEMMAN_DELETE($4); delete $4; }
+;
+
+sess_attributes:  attributes {
+			SDP->attributes = *$1;
+			MEMMAN_DELETE($1); delete $1; }
+;
+
+attributes:	  /* emtpy */	{ $$ = new list<t_sdp_attr>; MEMMAN_NEW($$); }
+		| attributes attribute {
+			$$->push_back(*$2);
+			MEMMAN_DELETE($2); delete $2; }
+;
+
+attribute:	  T_LINE_ATTRIBUTE attribute2 T_CRLF {
+			$$ = $2; }
+;
+
+attribute2:	  T_TOKEN {
+			$$ = new t_sdp_attr(*$1);
+			MEMMAN_NEW($$);
+			MEMMAN_DELETE($1); delete $1; }
+		| T_TOKEN ':' { CTX_LINE; } T_LINE { CTX_INITIAL; } {
+			$$ = new t_sdp_attr(*$1, *$4);
+			MEMMAN_NEW($$);
+			MEMMAN_DELETE($1); delete $1;
+			MEMMAN_DELETE($4); delete $4; }
+;
+
+media_list:	  /* empty */
+		| media_list media {
+			SDP->media.push_back(*$2);
+			MEMMAN_DELETE($2); delete $2; }
+;
+
+/* The unknown_lines cause an expected shift/reduce conflict */
+media:		  T_LINE_MEDIA T_TOKEN { CTX_NUM; } T_NUM { CTX_INITIAL; }
+		  transport formats T_CRLF unknown_lines connection
+		  unknown_lines attributes {
+		  	$$ = new t_sdp_media();
+			MEMMAN_NEW($$);
+			
+			if ($4 > 65535) YYERROR;
+			
+			$$->media_type = tolower(*$2);
+			$$->port = $4;
+			$$->transport = *$6;
+			
+			/* The format depends on the media type */
+			switch($$->get_media_type()) {
+			case SDP_AUDIO:
+			case SDP_VIDEO:
+				/* Numeric format */
+				for (list<string>::const_iterator it = $7->begin(); it != $7->end(); ++it) {
+					if (is_number(*it)) $$->formats.push_back(atoi(it->c_str()));
+				}
+				
+				break;
+			default:
+				/* Alpha numeric format */
+				$$->alpha_num_formats = *$7;
+			}
+			
+			$$->connection = *$10;
+			$$->attributes = *$12;
+			MEMMAN_DELETE($2); delete $2;
+			MEMMAN_DELETE($6); delete $6;
+			MEMMAN_DELETE($7); delete $7;
+			MEMMAN_DELETE($10); delete $10;
+			MEMMAN_DELETE($12); delete $12; }
+;
+
+transport:	  T_TOKEN { 
+			$$ = $1; }
+		| T_TOKEN '/' T_TOKEN {
+			$$ = new string(*$1 + '/' + *$3); 
+			MEMMAN_NEW($$);
+			MEMMAN_DELETE($1); delete $1; 
+			MEMMAN_DELETE($3); delete $3; }
+
+// For RTP/AVP a format is a number. For other transport protocols,
+// non-numerical formats are possible.
+formats:	  /* empty */	{ $$ = new list<string>; MEMMAN_NEW($$); }
+		| formats T_TOKEN {
+			$$->push_back(*$2);
+			MEMMAN_DELETE($2);
+			delete $2; }
+;
+
+/* Skip unknown lines */
+unknown_lines:	  /* empty */
+		| unknown_lines unknown_line
+;
+
+unknown_line:	  T_LINE_UNKNOWN { CTX_LINE; } T_LINE { CTX_INITIAL; }
+		  T_CRLF {
+		  	MEMMAN_DELETE($3); delete $3; }
+;
+
+%%
+
+void
+yysdperror (const char *s)  /* Called by yysdpparse on error */
+{
+  // printf ("%s\n", s);
+}
diff --git a/src/sdp/sdp_scanner.cxx b/src/sdp/sdp_scanner.cxx
new file mode 100644
index 0000000..c8f1202
--- /dev/null
+++ b/src/sdp/sdp_scanner.cxx
@@ -0,0 +1,1953 @@
+#line 2 "sdp_scanner.cxx"
+
+#line 4 "sdp_scanner.cxx"
+
+#define  YY_INT_ALIGNED short int
+
+/* A lexical scanner generated by flex */
+
+#define FLEX_SCANNER
+#define YY_FLEX_MAJOR_VERSION 2
+#define YY_FLEX_MINOR_VERSION 5
+#define YY_FLEX_SUBMINOR_VERSION 33
+#if YY_FLEX_SUBMINOR_VERSION > 0
+#define FLEX_BETA
+#endif
+
+/* First, we deal with  platform-specific or compiler-specific issues. */
+
+/* begin standard C headers. */
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <stdlib.h>
+
+/* end standard C headers. */
+
+/* flex integer type definitions */
+
+#ifndef FLEXINT_H
+#define FLEXINT_H
+
+/* C99 systems have <inttypes.h>. Non-C99 systems may or may not. */
+
+#if __STDC_VERSION__ >= 199901L
+
+/* C99 says to define __STDC_LIMIT_MACROS before including stdint.h,
+ * if you want the limit (max/min) macros for int types. 
+ */
+#ifndef __STDC_LIMIT_MACROS
+#define __STDC_LIMIT_MACROS 1
+#endif
+
+#include <inttypes.h>
+typedef int8_t flex_int8_t;
+typedef uint8_t flex_uint8_t;
+typedef int16_t flex_int16_t;
+typedef uint16_t flex_uint16_t;
+typedef int32_t flex_int32_t;
+typedef uint32_t flex_uint32_t;
+#else
+typedef signed char flex_int8_t;
+typedef short int flex_int16_t;
+typedef int flex_int32_t;
+typedef unsigned char flex_uint8_t; 
+typedef unsigned short int flex_uint16_t;
+typedef unsigned int flex_uint32_t;
+#endif /* ! C99 */
+
+/* Limits of integral types. */
+#ifndef INT8_MIN
+#define INT8_MIN               (-128)
+#endif
+#ifndef INT16_MIN
+#define INT16_MIN              (-32767-1)
+#endif
+#ifndef INT32_MIN
+#define INT32_MIN              (-2147483647-1)
+#endif
+#ifndef INT8_MAX
+#define INT8_MAX               (127)
+#endif
+#ifndef INT16_MAX
+#define INT16_MAX              (32767)
+#endif
+#ifndef INT32_MAX
+#define INT32_MAX              (2147483647)
+#endif
+#ifndef UINT8_MAX
+#define UINT8_MAX              (255U)
+#endif
+#ifndef UINT16_MAX
+#define UINT16_MAX             (65535U)
+#endif
+#ifndef UINT32_MAX
+#define UINT32_MAX             (4294967295U)
+#endif
+
+#endif /* ! FLEXINT_H */
+
+#ifdef __cplusplus
+
+/* The "const" storage-class-modifier is valid. */
+#define YY_USE_CONST
+
+#else	/* ! __cplusplus */
+
+#if __STDC__
+
+#define YY_USE_CONST
+
+#endif	/* __STDC__ */
+#endif	/* ! __cplusplus */
+
+#ifdef YY_USE_CONST
+#define yyconst const
+#else
+#define yyconst
+#endif
+
+/* Returned upon end-of-file. */
+#define YY_NULL 0
+
+/* Promotes a possibly negative, possibly signed char to an unsigned
+ * integer for use as an array index.  If the signed char is negative,
+ * we want to instead treat it as an 8-bit unsigned char, hence the
+ * double cast.
+ */
+#define YY_SC_TO_UI(c) ((unsigned int) (unsigned char) c)
+
+/* Enter a start condition.  This macro really ought to take a parameter,
+ * but we do it the disgusting crufty way forced on us by the ()-less
+ * definition of BEGIN.
+ */
+#define BEGIN (yy_start) = 1 + 2 *
+
+/* Translate the current start state into a value that can be later handed
+ * to BEGIN to return to the state.  The YYSTATE alias is for lex
+ * compatibility.
+ */
+#define YY_START (((yy_start) - 1) / 2)
+#define YYSTATE YY_START
+
+/* Action number for EOF rule of a given start state. */
+#define YY_STATE_EOF(state) (YY_END_OF_BUFFER + state + 1)
+
+/* Special action meaning "start processing a new file". */
+#define YY_NEW_FILE yysdprestart(yysdpin  )
+
+#define YY_END_OF_BUFFER_CHAR 0
+
+/* Size of default input buffer. */
+#ifndef YY_BUF_SIZE
+#define YY_BUF_SIZE 16384
+#endif
+
+/* The state buf must be large enough to hold one state per character in the main buffer.
+ */
+#define YY_STATE_BUF_SIZE   ((YY_BUF_SIZE + 2) * sizeof(yy_state_type))
+
+#ifndef YY_TYPEDEF_YY_BUFFER_STATE
+#define YY_TYPEDEF_YY_BUFFER_STATE
+typedef struct yy_buffer_state *YY_BUFFER_STATE;
+#endif
+
+extern int yysdpleng;
+
+extern FILE *yysdpin, *yysdpout;
+
+#define EOB_ACT_CONTINUE_SCAN 0
+#define EOB_ACT_END_OF_FILE 1
+#define EOB_ACT_LAST_MATCH 2
+
+    #define YY_LESS_LINENO(n)
+    
+/* Return all but the first "n" matched characters back to the input stream. */
+#define yyless(n) \
+	do \
+		{ \
+		/* Undo effects of setting up yysdptext. */ \
+        int yyless_macro_arg = (n); \
+        YY_LESS_LINENO(yyless_macro_arg);\
+		*yy_cp = (yy_hold_char); \
+		YY_RESTORE_YY_MORE_OFFSET \
+		(yy_c_buf_p) = yy_cp = yy_bp + yyless_macro_arg - YY_MORE_ADJ; \
+		YY_DO_BEFORE_ACTION; /* set up yysdptext again */ \
+		} \
+	while ( 0 )
+
+#define unput(c) yyunput( c, (yytext_ptr)  )
+
+/* The following is because we cannot portably get our hands on size_t
+ * (without autoconf's help, which isn't available because we want
+ * flex-generated scanners to compile on their own).
+ */
+
+#ifndef YY_TYPEDEF_YY_SIZE_T
+#define YY_TYPEDEF_YY_SIZE_T
+typedef unsigned int yy_size_t;
+#endif
+
+#ifndef YY_STRUCT_YY_BUFFER_STATE
+#define YY_STRUCT_YY_BUFFER_STATE
+struct yy_buffer_state
+	{
+	FILE *yy_input_file;
+
+	char *yy_ch_buf;		/* input buffer */
+	char *yy_buf_pos;		/* current position in input buffer */
+
+	/* Size of input buffer in bytes, not including room for EOB
+	 * characters.
+	 */
+	yy_size_t yy_buf_size;
+
+	/* Number of characters read into yy_ch_buf, not including EOB
+	 * characters.
+	 */
+	int yy_n_chars;
+
+	/* Whether we "own" the buffer - i.e., we know we created it,
+	 * and can realloc() it to grow it, and should free() it to
+	 * delete it.
+	 */
+	int yy_is_our_buffer;
+
+	/* Whether this is an "interactive" input source; if so, and
+	 * if we're using stdio for input, then we want to use getc()
+	 * instead of fread(), to make sure we stop fetching input after
+	 * each newline.
+	 */
+	int yy_is_interactive;
+
+	/* Whether we're considered to be at the beginning of a line.
+	 * If so, '^' rules will be active on the next match, otherwise
+	 * not.
+	 */
+	int yy_at_bol;
+
+    int yy_bs_lineno; /**< The line count. */
+    int yy_bs_column; /**< The column count. */
+    
+	/* Whether to try to fill the input buffer when we reach the
+	 * end of it.
+	 */
+	int yy_fill_buffer;
+
+	int yy_buffer_status;
+
+#define YY_BUFFER_NEW 0
+#define YY_BUFFER_NORMAL 1
+	/* When an EOF's been seen but there's still some text to process
+	 * then we mark the buffer as YY_EOF_PENDING, to indicate that we
+	 * shouldn't try reading from the input source any more.  We might
+	 * still have a bunch of tokens to match, though, because of
+	 * possible backing-up.
+	 *
+	 * When we actually see the EOF, we change the status to "new"
+	 * (via yysdprestart()), so that the user can continue scanning by
+	 * just pointing yysdpin at a new input file.
+	 */
+#define YY_BUFFER_EOF_PENDING 2
+
+	};
+#endif /* !YY_STRUCT_YY_BUFFER_STATE */
+
+/* Stack of input buffers. */
+static size_t yy_buffer_stack_top = 0; /**< index of top of stack. */
+static size_t yy_buffer_stack_max = 0; /**< capacity of stack. */
+static YY_BUFFER_STATE * yy_buffer_stack = 0; /**< Stack as an array. */
+
+/* We provide macros for accessing buffer states in case in the
+ * future we want to put the buffer states in a more general
+ * "scanner state".
+ *
+ * Returns the top of the stack, or NULL.
+ */
+#define YY_CURRENT_BUFFER ( (yy_buffer_stack) \
+                          ? (yy_buffer_stack)[(yy_buffer_stack_top)] \
+                          : NULL)
+
+/* Same as previous macro, but useful when we know that the buffer stack is not
+ * NULL or when we need an lvalue. For internal use only.
+ */
+#define YY_CURRENT_BUFFER_LVALUE (yy_buffer_stack)[(yy_buffer_stack_top)]
+
+/* yy_hold_char holds the character lost when yysdptext is formed. */
+static char yy_hold_char;
+static int yy_n_chars;		/* number of characters read into yy_ch_buf */
+int yysdpleng;
+
+/* Points to current character in buffer. */
+static char *yy_c_buf_p = (char *) 0;
+static int yy_init = 0;		/* whether we need to initialize */
+static int yy_start = 0;	/* start state number */
+
+/* Flag which is used to allow yysdpwrap()'s to do buffer switches
+ * instead of setting up a fresh yysdpin.  A bit of a hack ...
+ */
+static int yy_did_buffer_switch_on_eof;
+
+void yysdprestart (FILE *input_file  );
+void yysdp_switch_to_buffer (YY_BUFFER_STATE new_buffer  );
+YY_BUFFER_STATE yysdp_create_buffer (FILE *file,int size  );
+void yysdp_delete_buffer (YY_BUFFER_STATE b  );
+void yysdp_flush_buffer (YY_BUFFER_STATE b  );
+void yysdppush_buffer_state (YY_BUFFER_STATE new_buffer  );
+void yysdppop_buffer_state (void );
+
+static void yysdpensure_buffer_stack (void );
+static void yysdp_load_buffer_state (void );
+static void yysdp_init_buffer (YY_BUFFER_STATE b,FILE *file  );
+
+#define YY_FLUSH_BUFFER yysdp_flush_buffer(YY_CURRENT_BUFFER )
+
+YY_BUFFER_STATE yysdp_scan_buffer (char *base,yy_size_t size  );
+YY_BUFFER_STATE yysdp_scan_string (yyconst char *yy_str  );
+YY_BUFFER_STATE yysdp_scan_bytes (yyconst char *bytes,int len  );
+
+void *yysdpalloc (yy_size_t  );
+void *yysdprealloc (void *,yy_size_t  );
+void yysdpfree (void *  );
+
+#define yy_new_buffer yysdp_create_buffer
+
+#define yy_set_interactive(is_interactive) \
+	{ \
+	if ( ! YY_CURRENT_BUFFER ){ \
+        yysdpensure_buffer_stack (); \
+		YY_CURRENT_BUFFER_LVALUE =    \
+            yysdp_create_buffer(yysdpin,YY_BUF_SIZE ); \
+	} \
+	YY_CURRENT_BUFFER_LVALUE->yy_is_interactive = is_interactive; \
+	}
+
+#define yy_set_bol(at_bol) \
+	{ \
+	if ( ! YY_CURRENT_BUFFER ){\
+        yysdpensure_buffer_stack (); \
+		YY_CURRENT_BUFFER_LVALUE =    \
+            yysdp_create_buffer(yysdpin,YY_BUF_SIZE ); \
+	} \
+	YY_CURRENT_BUFFER_LVALUE->yy_at_bol = at_bol; \
+	}
+
+#define YY_AT_BOL() (YY_CURRENT_BUFFER_LVALUE->yy_at_bol)
+
+#define yysdpwrap(n) 1
+#define YY_SKIP_YYWRAP
+
+typedef unsigned char YY_CHAR;
+
+FILE *yysdpin = (FILE *) 0, *yysdpout = (FILE *) 0;
+
+typedef int yy_state_type;
+
+extern int yysdplineno;
+extern char *yysdptext;
+#define yytext_ptr yysdptext
+
+static yy_state_type yy_get_previous_state (void );
+static yy_state_type yy_try_NUL_trans (yy_state_type current_state  );
+static int yy_get_next_buffer (void );
+static void yy_fatal_error (yyconst char msg[]  );
+
+/* Done after the current pattern has been matched and before the
+ * corresponding action - sets up yysdptext.
+ */
+#define YY_DO_BEFORE_ACTION \
+	(yytext_ptr) = yy_bp; \
+	yysdpleng = (size_t) (yy_cp - yy_bp); \
+	(yy_hold_char) = *yy_cp; \
+	*yy_cp = '\0'; \
+	(yy_c_buf_p) = yy_cp;
+
+#define YY_NUM_RULES 27
+#define YY_END_OF_BUFFER 28
+/* This struct is not used in this scanner,
+   but its presence is necessary. */
+struct yy_trans_info
+	{
+	flex_int32_t yy_verify;
+	flex_int32_t yy_nxt;
+	};
+static yyconst flex_int16_t yy_accept[51] =
+    {   0,
+        0,    0,    0,    0,    0,    0,    0,    0,   28,   12,
+       11,   10,   12,    8,    8,    8,    8,    8,    8,    8,
+        8,   15,   14,   17,   15,   13,   23,   25,   26,   20,
+       19,   22,   20,   18,    9,    8,    5,    7,    4,    6,
+        2,    3,    1,   16,   13,   23,   24,   21,   18,    0
+    } ;
+
+static yyconst flex_int32_t yy_ec[256] =
+    {   0,
+        1,    1,    1,    1,    1,    1,    1,    1,    2,    3,
+        1,    1,    4,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    2,    5,    6,    6,    6,    5,    6,    7,    1,
+        1,    7,    7,    1,    7,    7,    6,    8,    8,    8,
+        8,    8,    8,    8,    8,    8,    8,    6,    6,    1,
+        9,    1,    6,    6,   10,   11,   12,   11,   11,   11,
+       11,   11,   11,   11,   11,   11,   13,   11,   14,   11,
+       11,   11,   15,   11,   11,   16,   11,   11,   11,   11,
+        6,    1,    6,    6,    7,    6,   10,   11,   12,   11,
+
+       11,   11,   11,   11,   11,   11,   11,   11,   13,   11,
+       14,   11,   11,   11,   15,   11,   11,   16,   11,   11,
+       11,   11,    6,    6,    6,    7,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
+        1,    1,    1,    1,    1
+    } ;
+
+static yyconst flex_int32_t yy_meta[17] =
+    {   0,
+        1,    1,    2,    2,    3,    4,    5,    5,    4,    5,
+        5,    5,    5,    5,    5,    5
+    } ;
+
+static yyconst flex_int16_t yy_base[58] =
+    {   0,
+        0,    9,   24,   31,    4,   26,   39,   44,   87,   88,
+       88,   88,   83,    0,   76,   75,   74,   73,   72,   71,
+       65,   88,   88,   88,   68,   30,    0,   88,   34,   88,
+       88,   88,   33,    0,   88,    0,   88,   88,   88,   88,
+       88,   88,   88,   88,   23,    0,   88,   88,    0,   88,
+       49,   54,   59,   64,   67,   72,   74
+    } ;
+
+static yyconst flex_int16_t yy_def[58] =
+    {   0,
+       51,   50,   52,   52,   53,   53,   54,   54,   50,   50,
+       50,   50,   50,   55,   55,   55,   55,   55,   55,   55,
+       55,   50,   50,   50,   50,   50,   56,   50,   50,   50,
+       50,   50,   50,   57,   50,   55,   50,   50,   50,   50,
+       50,   50,   50,   50,   50,   56,   50,   50,   57,    0,
+       50,   50,   50,   50,   50,   50,   50
+    } ;
+
+static yyconst flex_int16_t yy_nxt[105] =
+    {   0,
+       10,   11,   12,   13,   50,   10,   28,   29,   10,   10,
+       11,   12,   13,   14,   10,   14,   14,   10,   15,   16,
+       17,   18,   19,   20,   21,   23,   24,   25,   28,   29,
+       45,   26,   23,   24,   25,   48,   47,   45,   26,   30,
+       31,   32,   33,   30,   30,   31,   32,   33,   30,   14,
+       14,   14,   14,   14,   22,   22,   22,   22,   22,   27,
+       27,   27,   27,   27,   34,   34,   34,   34,   34,   36,
+       44,   36,   46,   43,   46,   46,   46,   49,   49,   42,
+       41,   40,   39,   38,   37,   35,   50,    9,   50,   50,
+       50,   50,   50,   50,   50,   50,   50,   50,   50,   50,
+
+       50,   50,   50,   50
+    } ;
+
+static yyconst flex_int16_t yy_chk[105] =
+    {   0,
+        1,    1,    1,    1,    0,    1,    5,    5,    1,    2,
+        2,    2,    2,    2,    2,    2,    2,    2,    2,    2,
+        2,    2,    2,    2,    2,    3,    3,    3,    6,    6,
+       45,    3,    4,    4,    4,   33,   29,   26,    4,    7,
+        7,    7,    7,    7,    8,    8,    8,    8,    8,   51,
+       51,   51,   51,   51,   52,   52,   52,   52,   52,   53,
+       53,   53,   53,   53,   54,   54,   54,   54,   54,   55,
+       25,   55,   56,   21,   56,   56,   56,   57,   57,   20,
+       19,   18,   17,   16,   15,   13,    9,   50,   50,   50,
+       50,   50,   50,   50,   50,   50,   50,   50,   50,   50,
+
+       50,   50,   50,   50
+    } ;
+
+static yy_state_type yy_last_accepting_state;
+static char *yy_last_accepting_cpos;
+
+extern int yysdp_flex_debug;
+int yysdp_flex_debug = 0;
+
+/* The intent behind this definition is that it'll catch
+ * any uses of REJECT which flex missed.
+ */
+#define REJECT reject_used_but_not_detected
+#define yymore() yymore_used_but_not_detected
+#define YY_MORE_ADJ 0
+#define YY_RESTORE_YY_MORE_OFFSET
+char *yysdptext;
+#line 1 "sdp_scanner.lxx"
+/*
+    Copyright (C) 2005-2009  Michel de Boer <michel@twinklephone.com>
+
+    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
+*/
+#line 20 "sdp_scanner.lxx"
+#include <string>
+#include "sdp_parse_ctrl.h"
+#include "sdp_parser.h"
+#include "audits/memman.h"
+
+using namespace std;
+
+
+
+#line 516 "sdp_scanner.cxx"
+
+#define INITIAL 0
+#define C_NUM 1
+#define C_LINE 2
+#define C_SAFE 3
+
+#ifndef YY_NO_UNISTD_H
+/* Special case for "unistd.h", since it is non-ANSI. We include it way
+ * down here because we want the user's section 1 to have been scanned first.
+ * The user has a chance to override it with an option.
+ */
+#include <unistd.h>
+#endif
+
+#ifndef YY_EXTRA_TYPE
+#define YY_EXTRA_TYPE void *
+#endif
+
+static int yy_init_globals (void );
+
+/* Macros after this point can all be overridden by user definitions in
+ * section 1.
+ */
+
+#ifndef YY_SKIP_YYWRAP
+#ifdef __cplusplus
+extern "C" int yysdpwrap (void );
+#else
+extern int yysdpwrap (void );
+#endif
+#endif
+
+    static void yyunput (int c,char *buf_ptr  );
+    
+#ifndef yytext_ptr
+static void yy_flex_strncpy (char *,yyconst char *,int );
+#endif
+
+#ifdef YY_NEED_STRLEN
+static int yy_flex_strlen (yyconst char * );
+#endif
+
+#ifndef YY_NO_INPUT
+
+#ifdef __cplusplus
+static int yyinput (void );
+#else
+static int input (void );
+#endif
+
+#endif
+
+        static int yy_start_stack_ptr = 0;
+        static int yy_start_stack_depth = 0;
+        static int *yy_start_stack = NULL;
+    
+    static void yy_push_state (int new_state );
+    
+    static void yy_pop_state (void );
+    
+    static int yy_top_state (void );
+    
+/* Amount of stuff to slurp up with each read. */
+#ifndef YY_READ_BUF_SIZE
+#define YY_READ_BUF_SIZE 8192
+#endif
+
+/* Copy whatever the last rule matched to the standard output. */
+#ifndef ECHO
+/* This used to be an fputs(), but since the string might contain NUL's,
+ * we now use fwrite().
+ */
+#define ECHO (void) fwrite( yysdptext, yysdpleng, 1, yysdpout )
+#endif
+
+/* Gets input and stuffs it into "buf".  number of characters read, or YY_NULL,
+ * is returned in "result".
+ */
+#ifndef YY_INPUT
+#define YY_INPUT(buf,result,max_size) \
+	if ( YY_CURRENT_BUFFER_LVALUE->yy_is_interactive ) \
+		{ \
+		int c = '*'; \
+		size_t n; \
+		for ( n = 0; n < max_size && \
+			     (c = getc( yysdpin )) != EOF && c != '\n'; ++n ) \
+			buf[n] = (char) c; \
+		if ( c == '\n' ) \
+			buf[n++] = (char) c; \
+		if ( c == EOF && ferror( yysdpin ) ) \
+			YY_FATAL_ERROR( "input in flex scanner failed" ); \
+		result = n; \
+		} \
+	else \
+		{ \
+		errno=0; \
+		while ( (result = fread(buf, 1, max_size, yysdpin))==0 && ferror(yysdpin)) \
+			{ \
+			if( errno != EINTR) \
+				{ \
+				YY_FATAL_ERROR( "input in flex scanner failed" ); \
+				break; \
+				} \
+			errno=0; \
+			clearerr(yysdpin); \
+			} \
+		}\
+\
+
+#endif
+
+/* No semi-colon after return; correct usage is to write "yyterminate();" -
+ * we don't want an extra ';' after the "return" because that will cause
+ * some compilers to complain about unreachable statements.
+ */
+#ifndef yyterminate
+#define yyterminate() return YY_NULL
+#endif
+
+/* Number of entries by which start-condition stack grows. */
+#ifndef YY_START_STACK_INCR
+#define YY_START_STACK_INCR 25
+#endif
+
+/* Report a fatal error. */
+#ifndef YY_FATAL_ERROR
+#define YY_FATAL_ERROR(msg) yy_fatal_error( msg )
+#endif
+
+/* end tables serialization structures and prototypes */
+
+/* Default declaration of generated scanner - a define so the user can
+ * easily add parameters.
+ */
+#ifndef YY_DECL
+#define YY_DECL_IS_OURS 1
+
+extern int yysdplex (void);
+
+#define YY_DECL int yysdplex (void)
+#endif /* !YY_DECL */
+
+/* Code executed at the beginning of each rule, after yysdptext and yysdpleng
+ * have been set up.
+ */
+#ifndef YY_USER_ACTION
+#define YY_USER_ACTION
+#endif
+
+/* Code executed at the end of each rule. */
+#ifndef YY_BREAK
+#define YY_BREAK break;
+#endif
+
+#define YY_RULE_SETUP \
+	if ( yysdpleng > 0 ) \
+		YY_CURRENT_BUFFER_LVALUE->yy_at_bol = \
+				(yysdptext[yysdpleng - 1] == '\n'); \
+	YY_USER_ACTION
+
+/** The main scanner function which does all the work.
+ */
+YY_DECL
+{
+	register yy_state_type yy_current_state;
+	register char *yy_cp, *yy_bp;
+	register int yy_act;
+    
+#line 41 "sdp_scanner.lxx"
+
+	switch (t_sdp_parser::context) {
+	case t_sdp_parser::X_NUM:	BEGIN(C_NUM); break;
+	case t_sdp_parser::X_LINE:	BEGIN(C_LINE); break;
+	case t_sdp_parser::X_SAFE:	BEGIN(C_SAFE); break;
+	default:			BEGIN(INITIAL);
+	}
+
+	/* SDP lines */
+#line 695 "sdp_scanner.cxx"
+
+	if ( !(yy_init) )
+		{
+		(yy_init) = 1;
+
+#ifdef YY_USER_INIT
+		YY_USER_INIT;
+#endif
+
+		if ( ! (yy_start) )
+			(yy_start) = 1;	/* first start state */
+
+		if ( ! yysdpin )
+			yysdpin = stdin;
+
+		if ( ! yysdpout )
+			yysdpout = stdout;
+
+		if ( ! YY_CURRENT_BUFFER ) {
+			yysdpensure_buffer_stack ();
+			YY_CURRENT_BUFFER_LVALUE =
+				yysdp_create_buffer(yysdpin,YY_BUF_SIZE );
+		}
+
+		yysdp_load_buffer_state( );
+		}
+
+	while ( 1 )		/* loops until end-of-file is reached */
+		{
+		yy_cp = (yy_c_buf_p);
+
+		/* Support of yysdptext. */
+		*yy_cp = (yy_hold_char);
+
+		/* yy_bp points to the position in yy_ch_buf of the start of
+		 * the current run.
+		 */
+		yy_bp = yy_cp;
+
+		yy_current_state = (yy_start);
+		yy_current_state += YY_AT_BOL();
+yy_match:
+		do
+			{
+			register YY_CHAR yy_c = yy_ec[YY_SC_TO_UI(*yy_cp)];
+			if ( yy_accept[yy_current_state] )
+				{
+				(yy_last_accepting_state) = yy_current_state;
+				(yy_last_accepting_cpos) = yy_cp;
+				}
+			while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
+				{
+				yy_current_state = (int) yy_def[yy_current_state];
+				if ( yy_current_state >= 51 )
+					yy_c = yy_meta[(unsigned int) yy_c];
+				}
+			yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
+			++yy_cp;
+			}
+		while ( yy_base[yy_current_state] != 88 );
+
+yy_find_action:
+		yy_act = yy_accept[yy_current_state];
+		if ( yy_act == 0 )
+			{ /* have to back up */
+			yy_cp = (yy_last_accepting_cpos);
+			yy_current_state = (yy_last_accepting_state);
+			yy_act = yy_accept[yy_current_state];
+			}
+
+		YY_DO_BEFORE_ACTION;
+
+do_action:	/* This label is used only to access EOF actions. */
+
+		switch ( yy_act )
+	{ /* beginning of action switch */
+			case 0: /* must back up */
+			/* undo the effects of YY_DO_BEFORE_ACTION */
+			*yy_cp = (yy_hold_char);
+			yy_cp = (yy_last_accepting_cpos);
+			yy_current_state = (yy_last_accepting_state);
+			goto yy_find_action;
+
+case 1:
+YY_RULE_SETUP
+#line 50 "sdp_scanner.lxx"
+{ return T_LINE_VERSION; }
+	YY_BREAK
+case 2:
+YY_RULE_SETUP
+#line 51 "sdp_scanner.lxx"
+{ return T_LINE_ORIGIN; }
+	YY_BREAK
+case 3:
+YY_RULE_SETUP
+#line 52 "sdp_scanner.lxx"
+{ return T_LINE_SESSION_NAME; }
+	YY_BREAK
+case 4:
+YY_RULE_SETUP
+#line 53 "sdp_scanner.lxx"
+{ return T_LINE_CONNECTION; }
+	YY_BREAK
+case 5:
+YY_RULE_SETUP
+#line 54 "sdp_scanner.lxx"
+{ return T_LINE_ATTRIBUTE; }
+	YY_BREAK
+case 6:
+YY_RULE_SETUP
+#line 55 "sdp_scanner.lxx"
+{ return T_LINE_MEDIA; }
+	YY_BREAK
+case 7:
+YY_RULE_SETUP
+#line 56 "sdp_scanner.lxx"
+{ return T_LINE_UNKNOWN; }
+	YY_BREAK
+/* Token as define in RFC 3261 */
+case 8:
+YY_RULE_SETUP
+#line 59 "sdp_scanner.lxx"
+{ yysdplval.yysdpt_str = new string(yysdptext);
+		  MEMMAN_NEW(yysdplval.yysdpt_str);
+		  return T_TOKEN; }
+	YY_BREAK
+/* End of line */
+case 9:
+/* rule 9 can match eol */
+YY_RULE_SETUP
+#line 64 "sdp_scanner.lxx"
+{ return T_CRLF; }
+	YY_BREAK
+case 10:
+/* rule 10 can match eol */
+YY_RULE_SETUP
+#line 65 "sdp_scanner.lxx"
+{ return T_CRLF; }
+	YY_BREAK
+case 11:
+YY_RULE_SETUP
+#line 67 "sdp_scanner.lxx"
+/* Skip white space */
+	YY_BREAK
+/* Single character token */
+case 12:
+YY_RULE_SETUP
+#line 70 "sdp_scanner.lxx"
+{ return yysdptext[0]; }
+	YY_BREAK
+/* Number */
+case 13:
+YY_RULE_SETUP
+#line 73 "sdp_scanner.lxx"
+{ yysdplval.yysdpt_int = atoi(yysdptext);
+			  return T_NUM; }
+	YY_BREAK
+case 14:
+YY_RULE_SETUP
+#line 75 "sdp_scanner.lxx"
+/* Skip white space */
+	YY_BREAK
+case 15:
+YY_RULE_SETUP
+#line 76 "sdp_scanner.lxx"
+{ return yysdptext[0]; }
+	YY_BREAK
+case 16:
+/* rule 16 can match eol */
+YY_RULE_SETUP
+#line 77 "sdp_scanner.lxx"
+{ return T_CRLF; }
+	YY_BREAK
+case 17:
+/* rule 17 can match eol */
+YY_RULE_SETUP
+#line 78 "sdp_scanner.lxx"
+{ return T_CRLF; }
+	YY_BREAK
+/* Safe */
+case 18:
+YY_RULE_SETUP
+#line 81 "sdp_scanner.lxx"
+{ yysdplval.yysdpt_str = new string(yysdptext);
+			  MEMMAN_NEW(yysdplval.yysdpt_str);
+			  return T_SAFE; }
+	YY_BREAK
+case 19:
+YY_RULE_SETUP
+#line 84 "sdp_scanner.lxx"
+/* Skip white space */
+	YY_BREAK
+case 20:
+YY_RULE_SETUP
+#line 85 "sdp_scanner.lxx"
+{ return yysdptext[0]; }
+	YY_BREAK
+case 21:
+/* rule 21 can match eol */
+YY_RULE_SETUP
+#line 86 "sdp_scanner.lxx"
+{ return T_CRLF; }
+	YY_BREAK
+case 22:
+/* rule 22 can match eol */
+YY_RULE_SETUP
+#line 87 "sdp_scanner.lxx"
+{ return T_CRLF; }
+	YY_BREAK
+/* Get all text till end of line */
+case 23:
+YY_RULE_SETUP
+#line 90 "sdp_scanner.lxx"
+{ yysdplval.yysdpt_str = new string(yysdptext);
+			  MEMMAN_NEW(yysdplval.yysdpt_str);
+			  return T_LINE; }
+	YY_BREAK
+case 24:
+/* rule 24 can match eol */
+YY_RULE_SETUP
+#line 93 "sdp_scanner.lxx"
+{ return T_CRLF; }
+	YY_BREAK
+case 25:
+/* rule 25 can match eol */
+YY_RULE_SETUP
+#line 94 "sdp_scanner.lxx"
+{ return T_CRLF; }
+	YY_BREAK
+case 26:
+YY_RULE_SETUP
+#line 95 "sdp_scanner.lxx"
+{ return T_CRLF; }
+	YY_BREAK
+case 27:
+YY_RULE_SETUP
+#line 96 "sdp_scanner.lxx"
+ECHO;
+	YY_BREAK
+#line 935 "sdp_scanner.cxx"
+case YY_STATE_EOF(INITIAL):
+case YY_STATE_EOF(C_NUM):
+case YY_STATE_EOF(C_LINE):
+case YY_STATE_EOF(C_SAFE):
+	yyterminate();
+
+	case YY_END_OF_BUFFER:
+		{
+		/* Amount of text matched not including the EOB char. */
+		int yy_amount_of_matched_text = (int) (yy_cp - (yytext_ptr)) - 1;
+
+		/* Undo the effects of YY_DO_BEFORE_ACTION. */
+		*yy_cp = (yy_hold_char);
+		YY_RESTORE_YY_MORE_OFFSET
+
+		if ( YY_CURRENT_BUFFER_LVALUE->yy_buffer_status == YY_BUFFER_NEW )
+			{
+			/* We're scanning a new file or input source.  It's
+			 * possible that this happened because the user
+			 * just pointed yysdpin at a new source and called
+			 * yysdplex().  If so, then we have to assure
+			 * consistency between YY_CURRENT_BUFFER and our
+			 * globals.  Here is the right place to do so, because
+			 * this is the first action (other than possibly a
+			 * back-up) that will match for the new input source.
+			 */
+			(yy_n_chars) = YY_CURRENT_BUFFER_LVALUE->yy_n_chars;
+			YY_CURRENT_BUFFER_LVALUE->yy_input_file = yysdpin;
+			YY_CURRENT_BUFFER_LVALUE->yy_buffer_status = YY_BUFFER_NORMAL;
+			}
+
+		/* Note that here we test for yy_c_buf_p "<=" to the position
+		 * of the first EOB in the buffer, since yy_c_buf_p will
+		 * already have been incremented past the NUL character
+		 * (since all states make transitions on EOB to the
+		 * end-of-buffer state).  Contrast this with the test
+		 * in input().
+		 */
+		if ( (yy_c_buf_p) <= &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)] )
+			{ /* This was really a NUL. */
+			yy_state_type yy_next_state;
+
+			(yy_c_buf_p) = (yytext_ptr) + yy_amount_of_matched_text;
+
+			yy_current_state = yy_get_previous_state(  );
+
+			/* Okay, we're now positioned to make the NUL
+			 * transition.  We couldn't have
+			 * yy_get_previous_state() go ahead and do it
+			 * for us because it doesn't know how to deal
+			 * with the possibility of jamming (and we don't
+			 * want to build jamming into it because then it
+			 * will run more slowly).
+			 */
+
+			yy_next_state = yy_try_NUL_trans( yy_current_state );
+
+			yy_bp = (yytext_ptr) + YY_MORE_ADJ;
+
+			if ( yy_next_state )
+				{
+				/* Consume the NUL. */
+				yy_cp = ++(yy_c_buf_p);
+				yy_current_state = yy_next_state;
+				goto yy_match;
+				}
+
+			else
+				{
+				yy_cp = (yy_c_buf_p);
+				goto yy_find_action;
+				}
+			}
+
+		else switch ( yy_get_next_buffer(  ) )
+			{
+			case EOB_ACT_END_OF_FILE:
+				{
+				(yy_did_buffer_switch_on_eof) = 0;
+
+				if ( yysdpwrap( ) )
+					{
+					/* Note: because we've taken care in
+					 * yy_get_next_buffer() to have set up
+					 * yysdptext, we can now set up
+					 * yy_c_buf_p so that if some total
+					 * hoser (like flex itself) wants to
+					 * call the scanner after we return the
+					 * YY_NULL, it'll still work - another
+					 * YY_NULL will get returned.
+					 */
+					(yy_c_buf_p) = (yytext_ptr) + YY_MORE_ADJ;
+
+					yy_act = YY_STATE_EOF(YY_START);
+					goto do_action;
+					}
+
+				else
+					{
+					if ( ! (yy_did_buffer_switch_on_eof) )
+						YY_NEW_FILE;
+					}
+				break;
+				}
+
+			case EOB_ACT_CONTINUE_SCAN:
+				(yy_c_buf_p) =
+					(yytext_ptr) + yy_amount_of_matched_text;
+
+				yy_current_state = yy_get_previous_state(  );
+
+				yy_cp = (yy_c_buf_p);
+				yy_bp = (yytext_ptr) + YY_MORE_ADJ;
+				goto yy_match;
+
+			case EOB_ACT_LAST_MATCH:
+				(yy_c_buf_p) =
+				&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)];
+
+				yy_current_state = yy_get_previous_state(  );
+
+				yy_cp = (yy_c_buf_p);
+				yy_bp = (yytext_ptr) + YY_MORE_ADJ;
+				goto yy_find_action;
+			}
+		break;
+		}
+
+	default:
+		YY_FATAL_ERROR(
+			"fatal flex scanner internal error--no action found" );
+	} /* end of action switch */
+		} /* end of scanning one token */
+} /* end of yysdplex */
+
+/* yy_get_next_buffer - try to read in a new buffer
+ *
+ * Returns a code representing an action:
+ *	EOB_ACT_LAST_MATCH -
+ *	EOB_ACT_CONTINUE_SCAN - continue scanning from current position
+ *	EOB_ACT_END_OF_FILE - end of file
+ */
+static int yy_get_next_buffer (void)
+{
+    	register char *dest = YY_CURRENT_BUFFER_LVALUE->yy_ch_buf;
+	register char *source = (yytext_ptr);
+	register int number_to_move, i;
+	int ret_val;
+
+	if ( (yy_c_buf_p) > &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars) + 1] )
+		YY_FATAL_ERROR(
+		"fatal flex scanner internal error--end of buffer missed" );
+
+	if ( YY_CURRENT_BUFFER_LVALUE->yy_fill_buffer == 0 )
+		{ /* Don't try to fill the buffer, so this is an EOF. */
+		if ( (yy_c_buf_p) - (yytext_ptr) - YY_MORE_ADJ == 1 )
+			{
+			/* We matched a single character, the EOB, so
+			 * treat this as a final EOF.
+			 */
+			return EOB_ACT_END_OF_FILE;
+			}
+
+		else
+			{
+			/* We matched some text prior to the EOB, first
+			 * process it.
+			 */
+			return EOB_ACT_LAST_MATCH;
+			}
+		}
+
+	/* Try to read more data. */
+
+	/* First move last chars to start of buffer. */
+	number_to_move = (int) ((yy_c_buf_p) - (yytext_ptr)) - 1;
+
+	for ( i = 0; i < number_to_move; ++i )
+		*(dest++) = *(source++);
+
+	if ( YY_CURRENT_BUFFER_LVALUE->yy_buffer_status == YY_BUFFER_EOF_PENDING )
+		/* don't do the read, it's not guaranteed to return an EOF,
+		 * just force an EOF
+		 */
+		YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars) = 0;
+
+	else
+		{
+			int num_to_read =
+			YY_CURRENT_BUFFER_LVALUE->yy_buf_size - number_to_move - 1;
+
+		while ( num_to_read <= 0 )
+			{ /* Not enough room in the buffer - grow it. */
+
+			/* just a shorter name for the current buffer */
+			YY_BUFFER_STATE b = YY_CURRENT_BUFFER;
+
+			int yy_c_buf_p_offset =
+				(int) ((yy_c_buf_p) - b->yy_ch_buf);
+
+			if ( b->yy_is_our_buffer )
+				{
+				int new_size = b->yy_buf_size * 2;
+
+				if ( new_size <= 0 )
+					b->yy_buf_size += b->yy_buf_size / 8;
+				else
+					b->yy_buf_size *= 2;
+
+				b->yy_ch_buf = (char *)
+					/* Include room in for 2 EOB chars. */
+					yysdprealloc((void *) b->yy_ch_buf,b->yy_buf_size + 2  );
+				}
+			else
+				/* Can't grow it, we don't own it. */
+				b->yy_ch_buf = 0;
+
+			if ( ! b->yy_ch_buf )
+				YY_FATAL_ERROR(
+				"fatal error - scanner input buffer overflow" );
+
+			(yy_c_buf_p) = &b->yy_ch_buf[yy_c_buf_p_offset];
+
+			num_to_read = YY_CURRENT_BUFFER_LVALUE->yy_buf_size -
+						number_to_move - 1;
+
+			}
+
+		if ( num_to_read > YY_READ_BUF_SIZE )
+			num_to_read = YY_READ_BUF_SIZE;
+
+		/* Read in more data. */
+		YY_INPUT( (&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[number_to_move]),
+			(yy_n_chars), num_to_read );
+
+		YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars);
+		}
+
+	if ( (yy_n_chars) == 0 )
+		{
+		if ( number_to_move == YY_MORE_ADJ )
+			{
+			ret_val = EOB_ACT_END_OF_FILE;
+			yysdprestart(yysdpin  );
+			}
+
+		else
+			{
+			ret_val = EOB_ACT_LAST_MATCH;
+			YY_CURRENT_BUFFER_LVALUE->yy_buffer_status =
+				YY_BUFFER_EOF_PENDING;
+			}
+		}
+
+	else
+		ret_val = EOB_ACT_CONTINUE_SCAN;
+
+	(yy_n_chars) += number_to_move;
+	YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)] = YY_END_OF_BUFFER_CHAR;
+	YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars) + 1] = YY_END_OF_BUFFER_CHAR;
+
+	(yytext_ptr) = &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[0];
+
+	return ret_val;
+}
+
+/* yy_get_previous_state - get the state just before the EOB char was reached */
+
+    static yy_state_type yy_get_previous_state (void)
+{
+	register yy_state_type yy_current_state;
+	register char *yy_cp;
+    
+	yy_current_state = (yy_start);
+	yy_current_state += YY_AT_BOL();
+
+	for ( yy_cp = (yytext_ptr) + YY_MORE_ADJ; yy_cp < (yy_c_buf_p); ++yy_cp )
+		{
+		register YY_CHAR yy_c = (*yy_cp ? yy_ec[YY_SC_TO_UI(*yy_cp)] : 1);
+		if ( yy_accept[yy_current_state] )
+			{
+			(yy_last_accepting_state) = yy_current_state;
+			(yy_last_accepting_cpos) = yy_cp;
+			}
+		while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
+			{
+			yy_current_state = (int) yy_def[yy_current_state];
+			if ( yy_current_state >= 51 )
+				yy_c = yy_meta[(unsigned int) yy_c];
+			}
+		yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
+		}
+
+	return yy_current_state;
+}
+
+/* yy_try_NUL_trans - try to make a transition on the NUL character
+ *
+ * synopsis
+ *	next_state = yy_try_NUL_trans( current_state );
+ */
+    static yy_state_type yy_try_NUL_trans  (yy_state_type yy_current_state )
+{
+	register int yy_is_jam;
+    	register char *yy_cp = (yy_c_buf_p);
+
+	register YY_CHAR yy_c = 1;
+	if ( yy_accept[yy_current_state] )
+		{
+		(yy_last_accepting_state) = yy_current_state;
+		(yy_last_accepting_cpos) = yy_cp;
+		}
+	while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
+		{
+		yy_current_state = (int) yy_def[yy_current_state];
+		if ( yy_current_state >= 51 )
+			yy_c = yy_meta[(unsigned int) yy_c];
+		}
+	yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
+	yy_is_jam = (yy_current_state == 50);
+
+	return yy_is_jam ? 0 : yy_current_state;
+}
+
+    static void yyunput (int c, register char * yy_bp )
+{
+	register char *yy_cp;
+    
+    yy_cp = (yy_c_buf_p);
+
+	/* undo effects of setting up yysdptext */
+	*yy_cp = (yy_hold_char);
+
+	if ( yy_cp < YY_CURRENT_BUFFER_LVALUE->yy_ch_buf + 2 )
+		{ /* need to shift things up to make room */
+		/* +2 for EOB chars. */
+		register int number_to_move = (yy_n_chars) + 2;
+		register char *dest = &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[
+					YY_CURRENT_BUFFER_LVALUE->yy_buf_size + 2];
+		register char *source =
+				&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[number_to_move];
+
+		while ( source > YY_CURRENT_BUFFER_LVALUE->yy_ch_buf )
+			*--dest = *--source;
+
+		yy_cp += (int) (dest - source);
+		yy_bp += (int) (dest - source);
+		YY_CURRENT_BUFFER_LVALUE->yy_n_chars =
+			(yy_n_chars) = YY_CURRENT_BUFFER_LVALUE->yy_buf_size;
+
+		if ( yy_cp < YY_CURRENT_BUFFER_LVALUE->yy_ch_buf + 2 )
+			YY_FATAL_ERROR( "flex scanner push-back overflow" );
+		}
+
+	*--yy_cp = (char) c;
+
+	(yytext_ptr) = yy_bp;
+	(yy_hold_char) = *yy_cp;
+	(yy_c_buf_p) = yy_cp;
+}
+
+#ifndef YY_NO_INPUT
+#ifdef __cplusplus
+    static int yyinput (void)
+#else
+    static int input  (void)
+#endif
+
+{
+	int c;
+    
+	*(yy_c_buf_p) = (yy_hold_char);
+
+	if ( *(yy_c_buf_p) == YY_END_OF_BUFFER_CHAR )
+		{
+		/* yy_c_buf_p now points to the character we want to return.
+		 * If this occurs *before* the EOB characters, then it's a
+		 * valid NUL; if not, then we've hit the end of the buffer.
+		 */
+		if ( (yy_c_buf_p) < &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)] )
+			/* This was really a NUL. */
+			*(yy_c_buf_p) = '\0';
+
+		else
+			{ /* need more input */
+			int offset = (yy_c_buf_p) - (yytext_ptr);
+			++(yy_c_buf_p);
+
+			switch ( yy_get_next_buffer(  ) )
+				{
+				case EOB_ACT_LAST_MATCH:
+					/* This happens because yy_g_n_b()
+					 * sees that we've accumulated a
+					 * token and flags that we need to
+					 * try matching the token before
+					 * proceeding.  But for input(),
+					 * there's no matching to consider.
+					 * So convert the EOB_ACT_LAST_MATCH
+					 * to EOB_ACT_END_OF_FILE.
+					 */
+
+					/* Reset buffer status. */
+					yysdprestart(yysdpin );
+
+					/*FALLTHROUGH*/
+
+				case EOB_ACT_END_OF_FILE:
+					{
+					if ( yysdpwrap( ) )
+						return EOF;
+
+					if ( ! (yy_did_buffer_switch_on_eof) )
+						YY_NEW_FILE;
+#ifdef __cplusplus
+					return yyinput();
+#else
+					return input();
+#endif
+					}
+
+				case EOB_ACT_CONTINUE_SCAN:
+					(yy_c_buf_p) = (yytext_ptr) + offset;
+					break;
+				}
+			}
+		}
+
+	c = *(unsigned char *) (yy_c_buf_p);	/* cast for 8-bit char's */
+	*(yy_c_buf_p) = '\0';	/* preserve yysdptext */
+	(yy_hold_char) = *++(yy_c_buf_p);
+
+	YY_CURRENT_BUFFER_LVALUE->yy_at_bol = (c == '\n');
+
+	return c;
+}
+#endif	/* ifndef YY_NO_INPUT */
+
+/** Immediately switch to a different input stream.
+ * @param input_file A readable stream.
+ * 
+ * @note This function does not reset the start condition to @c INITIAL .
+ */
+    void yysdprestart  (FILE * input_file )
+{
+    
+	if ( ! YY_CURRENT_BUFFER ){
+        yysdpensure_buffer_stack ();
+		YY_CURRENT_BUFFER_LVALUE =
+            yysdp_create_buffer(yysdpin,YY_BUF_SIZE );
+	}
+
+	yysdp_init_buffer(YY_CURRENT_BUFFER,input_file );
+	yysdp_load_buffer_state( );
+}
+
+/** Switch to a different input buffer.
+ * @param new_buffer The new input buffer.
+ * 
+ */
+    void yysdp_switch_to_buffer  (YY_BUFFER_STATE  new_buffer )
+{
+    
+	/* TODO. We should be able to replace this entire function body
+	 * with
+	 *		yysdppop_buffer_state();
+	 *		yysdppush_buffer_state(new_buffer);
+     */
+	yysdpensure_buffer_stack ();
+	if ( YY_CURRENT_BUFFER == new_buffer )
+		return;
+
+	if ( YY_CURRENT_BUFFER )
+		{
+		/* Flush out information for old buffer. */
+		*(yy_c_buf_p) = (yy_hold_char);
+		YY_CURRENT_BUFFER_LVALUE->yy_buf_pos = (yy_c_buf_p);
+		YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars);
+		}
+
+	YY_CURRENT_BUFFER_LVALUE = new_buffer;
+	yysdp_load_buffer_state( );
+
+	/* We don't actually know whether we did this switch during
+	 * EOF (yysdpwrap()) processing, but the only time this flag
+	 * is looked at is after yysdpwrap() is called, so it's safe
+	 * to go ahead and always set it.
+	 */
+	(yy_did_buffer_switch_on_eof) = 1;
+}
+
+static void yysdp_load_buffer_state  (void)
+{
+    	(yy_n_chars) = YY_CURRENT_BUFFER_LVALUE->yy_n_chars;
+	(yytext_ptr) = (yy_c_buf_p) = YY_CURRENT_BUFFER_LVALUE->yy_buf_pos;
+	yysdpin = YY_CURRENT_BUFFER_LVALUE->yy_input_file;
+	(yy_hold_char) = *(yy_c_buf_p);
+}
+
+/** Allocate and initialize an input buffer state.
+ * @param file A readable stream.
+ * @param size The character buffer size in bytes. When in doubt, use @c YY_BUF_SIZE.
+ * 
+ * @return the allocated buffer state.
+ */
+    YY_BUFFER_STATE yysdp_create_buffer  (FILE * file, int  size )
+{
+	YY_BUFFER_STATE b;
+    
+	b = (YY_BUFFER_STATE) yysdpalloc(sizeof( struct yy_buffer_state )  );
+	if ( ! b )
+		YY_FATAL_ERROR( "out of dynamic memory in yysdp_create_buffer()" );
+
+	b->yy_buf_size = size;
+
+	/* yy_ch_buf has to be 2 characters longer than the size given because
+	 * we need to put in 2 end-of-buffer characters.
+	 */
+	b->yy_ch_buf = (char *) yysdpalloc(b->yy_buf_size + 2  );
+	if ( ! b->yy_ch_buf )
+		YY_FATAL_ERROR( "out of dynamic memory in yysdp_create_buffer()" );
+
+	b->yy_is_our_buffer = 1;
+
+	yysdp_init_buffer(b,file );
+
+	return b;
+}
+
+/** Destroy the buffer.
+ * @param b a buffer created with yysdp_create_buffer()
+ * 
+ */
+    void yysdp_delete_buffer (YY_BUFFER_STATE  b )
+{
+    
+	if ( ! b )
+		return;
+
+	if ( b == YY_CURRENT_BUFFER ) /* Not sure if we should pop here. */
+		YY_CURRENT_BUFFER_LVALUE = (YY_BUFFER_STATE) 0;
+
+	if ( b->yy_is_our_buffer )
+		yysdpfree((void *) b->yy_ch_buf  );
+
+	yysdpfree((void *) b  );
+}
+
+#ifndef __cplusplus
+extern int isatty (int );
+#endif /* __cplusplus */
+    
+/* Initializes or reinitializes a buffer.
+ * This function is sometimes called more than once on the same buffer,
+ * such as during a yysdprestart() or at EOF.
+ */
+    static void yysdp_init_buffer  (YY_BUFFER_STATE  b, FILE * file )
+
+{
+	int oerrno = errno;
+    
+	yysdp_flush_buffer(b );
+
+	b->yy_input_file = file;
+	b->yy_fill_buffer = 1;
+
+    /* If b is the current buffer, then yysdp_init_buffer was _probably_
+     * called from yysdprestart() or through yy_get_next_buffer.
+     * In that case, we don't want to reset the lineno or column.
+     */
+    if (b != YY_CURRENT_BUFFER){
+        b->yy_bs_lineno = 1;
+        b->yy_bs_column = 0;
+    }
+
+        b->yy_is_interactive = file ? (isatty( fileno(file) ) > 0) : 0;
+    
+	errno = oerrno;
+}
+
+/** Discard all buffered characters. On the next scan, YY_INPUT will be called.
+ * @param b the buffer state to be flushed, usually @c YY_CURRENT_BUFFER.
+ * 
+ */
+    void yysdp_flush_buffer (YY_BUFFER_STATE  b )
+{
+    	if ( ! b )
+		return;
+
+	b->yy_n_chars = 0;
+
+	/* We always need two end-of-buffer characters.  The first causes
+	 * a transition to the end-of-buffer state.  The second causes
+	 * a jam in that state.
+	 */
+	b->yy_ch_buf[0] = YY_END_OF_BUFFER_CHAR;
+	b->yy_ch_buf[1] = YY_END_OF_BUFFER_CHAR;
+
+	b->yy_buf_pos = &b->yy_ch_buf[0];
+
+	b->yy_at_bol = 1;
+	b->yy_buffer_status = YY_BUFFER_NEW;
+
+	if ( b == YY_CURRENT_BUFFER )
+		yysdp_load_buffer_state( );
+}
+
+/** Pushes the new state onto the stack. The new state becomes
+ *  the current state. This function will allocate the stack
+ *  if necessary.
+ *  @param new_buffer The new state.
+ *  
+ */
+void yysdppush_buffer_state (YY_BUFFER_STATE new_buffer )
+{
+    	if (new_buffer == NULL)
+		return;
+
+	yysdpensure_buffer_stack();
+
+	/* This block is copied from yysdp_switch_to_buffer. */
+	if ( YY_CURRENT_BUFFER )
+		{
+		/* Flush out information for old buffer. */
+		*(yy_c_buf_p) = (yy_hold_char);
+		YY_CURRENT_BUFFER_LVALUE->yy_buf_pos = (yy_c_buf_p);
+		YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars);
+		}
+
+	/* Only push if top exists. Otherwise, replace top. */
+	if (YY_CURRENT_BUFFER)
+		(yy_buffer_stack_top)++;
+	YY_CURRENT_BUFFER_LVALUE = new_buffer;
+
+	/* copied from yysdp_switch_to_buffer. */
+	yysdp_load_buffer_state( );
+	(yy_did_buffer_switch_on_eof) = 1;
+}
+
+/** Removes and deletes the top of the stack, if present.
+ *  The next element becomes the new top.
+ *  
+ */
+void yysdppop_buffer_state (void)
+{
+    	if (!YY_CURRENT_BUFFER)
+		return;
+
+	yysdp_delete_buffer(YY_CURRENT_BUFFER );
+	YY_CURRENT_BUFFER_LVALUE = NULL;
+	if ((yy_buffer_stack_top) > 0)
+		--(yy_buffer_stack_top);
+
+	if (YY_CURRENT_BUFFER) {
+		yysdp_load_buffer_state( );
+		(yy_did_buffer_switch_on_eof) = 1;
+	}
+}
+
+/* Allocates the stack if it does not exist.
+ *  Guarantees space for at least one push.
+ */
+static void yysdpensure_buffer_stack (void)
+{
+	int num_to_alloc;
+    
+	if (!(yy_buffer_stack)) {
+
+		/* First allocation is just for 2 elements, since we don't know if this
+		 * scanner will even need a stack. We use 2 instead of 1 to avoid an
+		 * immediate realloc on the next call.
+         */
+		num_to_alloc = 1;
+		(yy_buffer_stack) = (struct yy_buffer_state**)yysdpalloc
+								(num_to_alloc * sizeof(struct yy_buffer_state*)
+								);
+		
+		memset((yy_buffer_stack), 0, num_to_alloc * sizeof(struct yy_buffer_state*));
+				
+		(yy_buffer_stack_max) = num_to_alloc;
+		(yy_buffer_stack_top) = 0;
+		return;
+	}
+
+	if ((yy_buffer_stack_top) >= ((yy_buffer_stack_max)) - 1){
+
+		/* Increase the buffer to prepare for a possible push. */
+		int grow_size = 8 /* arbitrary grow size */;
+
+		num_to_alloc = (yy_buffer_stack_max) + grow_size;
+		(yy_buffer_stack) = (struct yy_buffer_state**)yysdprealloc
+								((yy_buffer_stack),
+								num_to_alloc * sizeof(struct yy_buffer_state*)
+								);
+
+		/* zero only the new slots.*/
+		memset((yy_buffer_stack) + (yy_buffer_stack_max), 0, grow_size * sizeof(struct yy_buffer_state*));
+		(yy_buffer_stack_max) = num_to_alloc;
+	}
+}
+
+/** Setup the input buffer state to scan directly from a user-specified character buffer.
+ * @param base the character buffer
+ * @param size the size in bytes of the character buffer
+ * 
+ * @return the newly allocated buffer state object. 
+ */
+YY_BUFFER_STATE yysdp_scan_buffer  (char * base, yy_size_t  size )
+{
+	YY_BUFFER_STATE b;
+    
+	if ( size < 2 ||
+	     base[size-2] != YY_END_OF_BUFFER_CHAR ||
+	     base[size-1] != YY_END_OF_BUFFER_CHAR )
+		/* They forgot to leave room for the EOB's. */
+		return 0;
+
+	b = (YY_BUFFER_STATE) yysdpalloc(sizeof( struct yy_buffer_state )  );
+	if ( ! b )
+		YY_FATAL_ERROR( "out of dynamic memory in yysdp_scan_buffer()" );
+
+	b->yy_buf_size = size - 2;	/* "- 2" to take care of EOB's */
+	b->yy_buf_pos = b->yy_ch_buf = base;
+	b->yy_is_our_buffer = 0;
+	b->yy_input_file = 0;
+	b->yy_n_chars = b->yy_buf_size;
+	b->yy_is_interactive = 0;
+	b->yy_at_bol = 1;
+	b->yy_fill_buffer = 0;
+	b->yy_buffer_status = YY_BUFFER_NEW;
+
+	yysdp_switch_to_buffer(b  );
+
+	return b;
+}
+
+/** Setup the input buffer state to scan a string. The next call to yysdplex() will
+ * scan from a @e copy of @a str.
+ * @param str a NUL-terminated string to scan
+ * 
+ * @return the newly allocated buffer state object.
+ * @note If you want to scan bytes that may contain NUL values, then use
+ *       yysdp_scan_bytes() instead.
+ */
+YY_BUFFER_STATE yysdp_scan_string (yyconst char * yystr )
+{
+    
+	return yysdp_scan_bytes(yystr,strlen(yystr) );
+}
+
+/** Setup the input buffer state to scan the given bytes. The next call to yysdplex() will
+ * scan from a @e copy of @a bytes.
+ * @param bytes the byte buffer to scan
+ * @param len the number of bytes in the buffer pointed to by @a bytes.
+ * 
+ * @return the newly allocated buffer state object.
+ */
+YY_BUFFER_STATE yysdp_scan_bytes  (yyconst char * yybytes, int  _yybytes_len )
+{
+	YY_BUFFER_STATE b;
+	char *buf;
+	yy_size_t n;
+	int i;
+    
+	/* Get memory for full buffer, including space for trailing EOB's. */
+	n = _yybytes_len + 2;
+	buf = (char *) yysdpalloc(n  );
+	if ( ! buf )
+		YY_FATAL_ERROR( "out of dynamic memory in yysdp_scan_bytes()" );
+
+	for ( i = 0; i < _yybytes_len; ++i )
+		buf[i] = yybytes[i];
+
+	buf[_yybytes_len] = buf[_yybytes_len+1] = YY_END_OF_BUFFER_CHAR;
+
+	b = yysdp_scan_buffer(buf,n );
+	if ( ! b )
+		YY_FATAL_ERROR( "bad buffer in yysdp_scan_bytes()" );
+
+	/* It's okay to grow etc. this buffer, and we should throw it
+	 * away when we're done.
+	 */
+	b->yy_is_our_buffer = 1;
+
+	return b;
+}
+
+    static void yy_push_state (int  new_state )
+{
+    	if ( (yy_start_stack_ptr) >= (yy_start_stack_depth) )
+		{
+		yy_size_t new_size;
+
+		(yy_start_stack_depth) += YY_START_STACK_INCR;
+		new_size = (yy_start_stack_depth) * sizeof( int );
+
+		if ( ! (yy_start_stack) )
+			(yy_start_stack) = (int *) yysdpalloc(new_size  );
+
+		else
+			(yy_start_stack) = (int *) yysdprealloc((void *) (yy_start_stack),new_size  );
+
+		if ( ! (yy_start_stack) )
+			YY_FATAL_ERROR(
+			"out of memory expanding start-condition stack" );
+		}
+
+	(yy_start_stack)[(yy_start_stack_ptr)++] = YY_START;
+
+	BEGIN(new_state);
+}
+
+    static void yy_pop_state  (void)
+{
+    	if ( --(yy_start_stack_ptr) < 0 )
+		YY_FATAL_ERROR( "start-condition stack underflow" );
+
+	BEGIN((yy_start_stack)[(yy_start_stack_ptr)]);
+}
+
+    static int yy_top_state  (void)
+{
+    	return (yy_start_stack)[(yy_start_stack_ptr) - 1];
+}
+
+#ifndef YY_EXIT_FAILURE
+#define YY_EXIT_FAILURE 2
+#endif
+
+static void yy_fatal_error (yyconst char* msg )
+{
+    	(void) fprintf( stderr, "%s\n", msg );
+	exit( YY_EXIT_FAILURE );
+}
+
+/* Redefine yyless() so it works in section 3 code. */
+
+#undef yyless
+#define yyless(n) \
+	do \
+		{ \
+		/* Undo effects of setting up yysdptext. */ \
+        int yyless_macro_arg = (n); \
+        YY_LESS_LINENO(yyless_macro_arg);\
+		yysdptext[yysdpleng] = (yy_hold_char); \
+		(yy_c_buf_p) = yysdptext + yyless_macro_arg; \
+		(yy_hold_char) = *(yy_c_buf_p); \
+		*(yy_c_buf_p) = '\0'; \
+		yysdpleng = yyless_macro_arg; \
+		} \
+	while ( 0 )
+
+/* Accessor  methods (get/set functions) to struct members. */
+
+/** Get the input stream.
+ * 
+ */
+FILE *yysdpget_in  (void)
+{
+        return yysdpin;
+}
+
+/** Get the output stream.
+ * 
+ */
+FILE *yysdpget_out  (void)
+{
+        return yysdpout;
+}
+
+/** Get the length of the current token.
+ * 
+ */
+int yysdpget_leng  (void)
+{
+        return yysdpleng;
+}
+
+/** Get the current token.
+ * 
+ */
+
+char *yysdpget_text  (void)
+{
+        return yysdptext;
+}
+
+/** Set the input stream. This does not discard the current
+ * input buffer.
+ * @param in_str A readable stream.
+ * 
+ * @see yysdp_switch_to_buffer
+ */
+void yysdpset_in (FILE *  in_str )
+{
+        yysdpin = in_str ;
+}
+
+void yysdpset_out (FILE *  out_str )
+{
+        yysdpout = out_str ;
+}
+
+int yysdpget_debug  (void)
+{
+        return yysdp_flex_debug;
+}
+
+void yysdpset_debug (int  bdebug )
+{
+        yysdp_flex_debug = bdebug ;
+}
+
+static int yy_init_globals (void)
+{
+        /* Initialization is the same as for the non-reentrant scanner.
+     * This function is called from yysdplex_destroy(), so don't allocate here.
+     */
+
+    (yy_buffer_stack) = 0;
+    (yy_buffer_stack_top) = 0;
+    (yy_buffer_stack_max) = 0;
+    (yy_c_buf_p) = (char *) 0;
+    (yy_init) = 0;
+    (yy_start) = 0;
+
+    (yy_start_stack_ptr) = 0;
+    (yy_start_stack_depth) = 0;
+    (yy_start_stack) =  NULL;
+
+/* Defined in main.c */
+#ifdef YY_STDINIT
+    yysdpin = stdin;
+    yysdpout = stdout;
+#else
+    yysdpin = (FILE *) 0;
+    yysdpout = (FILE *) 0;
+#endif
+
+    /* For future reference: Set errno on error, since we are called by
+     * yysdplex_init()
+     */
+    return 0;
+}
+
+/* yysdplex_destroy is for both reentrant and non-reentrant scanners. */
+int yysdplex_destroy  (void)
+{
+    
+    /* Pop the buffer stack, destroying each element. */
+	while(YY_CURRENT_BUFFER){
+		yysdp_delete_buffer(YY_CURRENT_BUFFER  );
+		YY_CURRENT_BUFFER_LVALUE = NULL;
+		yysdppop_buffer_state();
+	}
+
+	/* Destroy the stack itself. */
+	yysdpfree((yy_buffer_stack) );
+	(yy_buffer_stack) = NULL;
+
+    /* Destroy the start condition stack. */
+        yysdpfree((yy_start_stack)  );
+        (yy_start_stack) = NULL;
+
+    /* Reset the globals. This is important in a non-reentrant scanner so the next time
+     * yysdplex() is called, initialization will occur. */
+    yy_init_globals( );
+
+    return 0;
+}
+
+/*
+ * Internal utility routines.
+ */
+
+#ifndef yytext_ptr
+static void yy_flex_strncpy (char* s1, yyconst char * s2, int n )
+{
+	register int i;
+	for ( i = 0; i < n; ++i )
+		s1[i] = s2[i];
+}
+#endif
+
+#ifdef YY_NEED_STRLEN
+static int yy_flex_strlen (yyconst char * s )
+{
+	register int n;
+	for ( n = 0; s[n]; ++n )
+		;
+
+	return n;
+}
+#endif
+
+void *yysdpalloc (yy_size_t  size )
+{
+	return (void *) malloc( size );
+}
+
+void *yysdprealloc  (void * ptr, yy_size_t  size )
+{
+	/* The cast to (char *) in the following accommodates both
+	 * implementations that use char* generic pointers, and those
+	 * that use void* generic pointers.  It works with the latter
+	 * because both ANSI C and C++ allow castless assignment from
+	 * any pointer type to void*, and deal with argument conversions
+	 * as though doing an assignment.
+	 */
+	return (void *) realloc( (char *) ptr, size );
+}
+
+void yysdpfree (void * ptr )
+{
+	free( (char *) ptr );	/* see yysdprealloc() for (char *) cast */
+}
+
+#define YYTABLES_NAME "yytables"
+
+#line 96 "sdp_scanner.lxx"
diff --git a/src/sdp/sdp_scanner.lxx b/src/sdp/sdp_scanner.lxx
new file mode 100644
index 0000000..5ea9ac3
--- /dev/null
+++ b/src/sdp/sdp_scanner.lxx
@@ -0,0 +1,95 @@
+/*
+    Copyright (C) 2005-2009  Michel de Boer <michel@twinklephone.com>
+
+    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 <string>
+#include "sdp_parse_ctrl.h"
+#include "sdp_parser.h"
+#include "audits/memman.h"
+
+using namespace std;
+%}
+
+%option noyywrap
+%option stack
+
+DIGIT		[0-9]
+ALPHA		[a-zA-Z]
+ALNUM		[a-zA-Z0-9]
+TOKEN_SYM	[[:alnum:]\-\.!%\*_\+\'~]
+SAFE_SYM	[[:alnum:]'`\-\.\/:\?\"#\$&\*;=@\[\]\^_\{|\}\+~\"]
+
+%x C_NUM
+%x C_LINE
+%x C_SAFE
+
+%%
+	switch (t_sdp_parser::context) {
+	case t_sdp_parser::X_NUM:	BEGIN(C_NUM); break;
+	case t_sdp_parser::X_LINE:	BEGIN(C_LINE); break;
+	case t_sdp_parser::X_SAFE:	BEGIN(C_SAFE); break;
+	default:			BEGIN(INITIAL);
+	}
+
+	/* SDP lines */
+^v=		{ return T_LINE_VERSION; }
+^o=		{ return T_LINE_ORIGIN; }
+^s=		{ return T_LINE_SESSION_NAME; }
+^c=		{ return T_LINE_CONNECTION; }
+^a=		{ return T_LINE_ATTRIBUTE; }
+^m=		{ return T_LINE_MEDIA; }
+^{ALPHA}=	{ return T_LINE_UNKNOWN; }
+
+	/* Token as define in RFC 3261 */
+{TOKEN_SYM}+ 	{ yysdplval.yysdpt_str = new string(yysdptext);
+		  MEMMAN_NEW(yysdplval.yysdpt_str);
+		  return T_TOKEN; }
+
+	/* End of line */
+\r\n		{ return T_CRLF; }
+\n		{ return T_CRLF; }
+
+[[:blank:]]	/* Skip white space */
+
+	/* Single character token */
+.		{ return yysdptext[0]; }
+
+	/* Number */
+<C_NUM>{DIGIT}+		{ yysdplval.yysdpt_int = atoi(yysdptext);
+			  return T_NUM; }
+<C_NUM>[[:blank:]]	/* Skip white space */
+<C_NUM>.		{ return yysdptext[0]; }
+<C_NUM>\r\n		{ return T_CRLF; }
+<C_NUM>\n		{ return T_CRLF; }
+
+	/* Safe */
+<C_SAFE>{SAFE_SYM}+	{ yysdplval.yysdpt_str = new string(yysdptext);
+			  MEMMAN_NEW(yysdplval.yysdpt_str);
+			  return T_SAFE; }
+<C_SAFE>[[:blank:]]	/* Skip white space */
+<C_SAFE>.		{ return yysdptext[0]; }
+<C_SAFE>\r\n		{ return T_CRLF; }
+<C_SAFE>\n		{ return T_CRLF; }
+
+	/* Get all text till end of line */
+<C_LINE>[^\r\n]+	{ yysdplval.yysdpt_str = new string(yysdptext);
+			  MEMMAN_NEW(yysdplval.yysdpt_str);
+			  return T_LINE; }
+<C_LINE>\r\n		{ return T_CRLF; }
+<C_LINE>\n		{ return T_CRLF; }
+<C_LINE>\r		{ return T_CRLF; }