From e2bc6f4153813cc570ae814c8ddb74628009b488 Mon Sep 17 00:00:00 2001 From: Michal Kubecek Date: Mon, 13 Apr 2015 09:21:39 +0200 Subject: initial checkin Check in contents of upstream 1.4.2 tarball, exclude generated files. --- src/sdp/Makefile.am | 27 + src/sdp/sdp.cpp | 806 ++++++++++++++++++ src/sdp/sdp.h | 295 +++++++ src/sdp/sdp_parse_ctrl.cpp | 70 ++ src/sdp/sdp_parse_ctrl.h | 63 ++ src/sdp/sdp_parser.h | 98 +++ src/sdp/sdp_parser.yxx | 294 +++++++ src/sdp/sdp_scanner.cxx | 1953 ++++++++++++++++++++++++++++++++++++++++++++ src/sdp/sdp_scanner.lxx | 95 +++ 9 files changed, 3701 insertions(+) create mode 100644 src/sdp/Makefile.am create mode 100644 src/sdp/sdp.cpp create mode 100644 src/sdp/sdp.h create mode 100644 src/sdp/sdp_parse_ctrl.cpp create mode 100644 src/sdp/sdp_parse_ctrl.h create mode 100644 src/sdp/sdp_parser.h create mode 100644 src/sdp/sdp_parser.yxx create mode 100644 src/sdp/sdp_scanner.cxx create mode 100644 src/sdp/sdp_scanner.lxx (limited to 'src/sdp') 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 + + 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 +#include +#include +#include +#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 &_formats, + unsigned short _format_dtmf, + const map &ac2format) +{ + media_type = sdp_media_type2str(_media_type); + port = _port; + transport = sdp_transport2str(SDP_TRANS_RTP); + format_dtmf = _format_dtmf; + + for (list::const_iterator i = _formats.begin(); + i != _formats.end(); i++) + { + map::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::const_iterator i = formats.begin(); + i != formats.end(); ++i) + { + s += ' ' + int2str(*i); + } + + // Alpha numeric formats. + for (list::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::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::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_media::get_attributes(const string &name) { + list l; + + for (list::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(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 &formats, unsigned short format_dtmf, + const map &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::const_iterator i = attributes.begin(); + i != attributes.end(); i++) + { + s += i->encode(); + } + + for (list::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(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 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(get_first_media(media_type)); + assert(m != NULL); + + const list attrs = m->get_attributes("rtpmap"); + if (attrs.empty()) return ""; + + for (list::const_iterator i = attrs.begin(); + i != attrs.end(); i++) + { + vector 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 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(get_first_media(media_type)); + assert(m != NULL); + + const list attrs = m->get_attributes("fmtp"); + if (attrs.empty()) return ""; + + for (list::const_iterator i = attrs.begin(); + i != attrs.end(); i++) + { + vector 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 l = str2param_list(fmtp); + list::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(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(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(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(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(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 ¶m, 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(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::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::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 + + 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 +#include +#include +#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 formats; + + /** Media formats in alpha numeric form. */ + list alpha_num_formats; + //@} + + /** Optional connection information if not specified on global level. */ + t_sdp_connection connection; + + /** Attributes (a= lines) */ + list attributes; + + t_sdp_media(); + t_sdp_media(t_sdp_media_type _media_type, + unsigned short _port, const list &_formats, + unsigned short _format_dtmf, + const map &ac2format); + + string encode(void) const; + void add_format(unsigned short f, t_audio_codec codec); + t_sdp_attr *get_attribute(const string &name); + listget_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 attributes; + list 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 &formats, unsigned short format_dtmf, + const map &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 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 ¶m, 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 + + 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 + + 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 *yysdpt_attributes; + t_sdp_attr *yysdpt_attribute; + t_sdp_media *yysdpt_media; + list *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 + + 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 +#include +#include +#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 *yysdpt_attributes; + t_sdp_attr *yysdpt_attribute; + t_sdp_media *yysdpt_media; + list *yysdpt_token_list; +} + +%token T_NUM +%token T_TOKEN +%token T_SAFE +%token 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 address_type +%type connection +%type network_type +%type attributes +%type attribute +%type attribute2 +%type media +%type transport +%type 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; 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($$->get_media_type()) { + case SDP_AUDIO: + case SDP_VIDEO: + /* Numeric format */ + for (list::const_iterator it = $7->begin(); it != $7->end(); ++it) { + if (is_number(*it)) $$->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 */ { $$ = new list; MEMMAN_NEW($$); } + | 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 +#include +#include +#include + +/* end standard C headers. */ + +/* flex integer type definitions */ + +#ifndef FLEXINT_H +#define FLEXINT_H + +/* C99 systems have . 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 +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 + + 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 +#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 +#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 + + 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 +#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 */ +{DIGIT}+ { yysdplval.yysdpt_int = atoi(yysdptext); + return T_NUM; } +[[:blank:]] /* Skip white space */ +. { return yysdptext[0]; } +\r\n { return T_CRLF; } +\n { return T_CRLF; } + + /* Safe */ +{SAFE_SYM}+ { yysdplval.yysdpt_str = new string(yysdptext); + MEMMAN_NEW(yysdplval.yysdpt_str); + return T_SAFE; } +[[:blank:]] /* Skip white space */ +. { return yysdptext[0]; } +\r\n { return T_CRLF; } +\n { return T_CRLF; } + + /* Get all text till end of line */ +[^\r\n]+ { yysdplval.yysdpt_str = new string(yysdptext); + MEMMAN_NEW(yysdplval.yysdpt_str); + return T_LINE; } +\r\n { return T_CRLF; } +\n { return T_CRLF; } +\r { return T_CRLF; } -- cgit v1.2.3