/* This file is part of FreeSDP Copyright (C) 2001,2002,2003 Federico Montesino Pouzols FreeSDP 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 Benjamin Zores, (C) 2006 added support in parser for the a=control: lines. added support in parser for the a=range: lines. */ /** * @file parser.h * @ingroup parser * @short Specific public header for parsing module. **/ #ifndef FSDP_PARSER_H #define FSDP_PARSER_H #include "common.h" BEGIN_C_DECLS /** * @defgroup parser FreeSDP Parsing Module * * SDP descriptions parsing routines. * @{ **/ /** * Parse a SDP description in description, extracting the * session properties into dsc. These properties can be * obtained individually later using the fsdp_get_xxxx * functions. * * @param description a multimedia session description formatted in * SDP. * @param dsc pointer that is updated to point to a fsdp_description_t * object. This fsdp_description_t object should have been previously * allocated using fsdp_description_new(); to free it, * fsdp_description_delete() should be used. * * @return FSDPE_OK when parsing completes successfully. Otherwise, * another error code is returned. **/ fsdp_error_t fsdp_parse (const char *description, fsdp_description_t * dsc); /** * Get the SDP protocol version of the description. * * @return SDP protocol version number. **/ unsigned int fsdp_get_version (const fsdp_description_t * dsc); /** * Get the username provided by the originator of the session. * * @param dsc SDP description object. * @return username of the session owner **/ const char *fsdp_get_owner_username (const fsdp_description_t * dsc); /** * Get the id for the session described in dsc. * * @param dsc SDP description object. * @return id string for this session. **/ const char *fsdp_get_session_id (const fsdp_description_t * dsc); /** * Get the announcement version for the session description in * dsc. * * @param dsc SDP description object. * @return announcement version string for this description. **/ const char *fsdp_get_announcement_version (const fsdp_description_t * dsc); /** * Get the the type of network the owner of the session described in * dsc is based on. * * @param dsc SDP description object. * @return network type for the owner of this session. **/ fsdp_network_type_t fsdp_get_owner_network_type (const fsdp_description_t * dsc); /** * Get the the type of address the owner of the session described in * dsc is based on. * * @param dsc SDP description object. * @return network address type for the owner of this session. **/ fsdp_address_type_t fsdp_get_owner_address_type (const fsdp_description_t * dsc); /** * Get the network address of the owner of the session described in * dsc. * * @param dsc SDP description object. * @return network address for the owner this session. **/ const char *fsdp_get_owner_address (const fsdp_description_t * dsc); /** * Get the name of the session described in dsc. * * @param dsc SDP description object. * @return name of this session. **/ const char *fsdp_get_name (const fsdp_description_t * dsc); /** * Get the information about the session provided in the description * dsc. * * @param dsc SDP description object. * @return information of this session. **/ const char *fsdp_get_information (const fsdp_description_t * dsc); /** * Get an URI about the session provided in the description * dsc. * * @param dsc SDP description object. * @return string containing an URI about the session. NULL if the * session uri is missing. **/ const char *fsdp_get_uri (const fsdp_description_t * dsc); /** * Get the number of emails specified for the session in the description * dsc. * * @param dsc SDP description object. * @return number of emails. **/ unsigned int fsdp_get_emails_count (const fsdp_description_t * dsc); /** * Get the n-th email specified for the session in the description * dsc. * * @param dsc SDP description object. * @param index number of URI. Note that this index follows the * traditional C convention: from 0 to fsdp_get_emails_count() - 1. * @return string containing an email about the session. NULL if there * is no such index. **/ const char *fsdp_get_email (const fsdp_description_t * dsc, unsigned int index); /** * Get the number of phones specified for the session in the description * dsc. * * @param dsc SDP description object. * @return number of emails. **/ unsigned int fsdp_get_phones_count (const fsdp_description_t * dsc); /** * Get the n-th phone specified for the session in the description * dsc. * * @param dsc SDP description object. * @param index number of URI. Note that this index follows the * traditional C convention: from 0 to fsdp_get_phones_count() - 1. * @return string containing a phone about the session. NULL if there * is no such index. **/ const char *fsdp_get_phone (const fsdp_description_t * dsc, unsigned int index); /** * Get the the global type of network of the multimedia session * connection. * * @param dsc SDP description object. * @return global network type for this * connection. FSDP_NETWORK_TYPE_UNDEFINED if no global network * address type is included in the description. **/ fsdp_network_type_t fsdp_get_global_conn_network_type (const fsdp_description_t * dsc); /** * Get the the global type of network address of the multimedia * session connection. * * @param dsc SDP description object. * @return global network address type for this connection. * FSDP_ADDRESS_TYPE_UNDEFINED if no global network address type is * included in the description. **/ fsdp_address_type_t fsdp_get_global_conn_address_type (const fsdp_description_t * dsc); /** * Get the the global address of the multimedia session connection. * * @param dsc SDP description object. * @return global address for this connection. **/ const char *fsdp_get_global_conn_address (const fsdp_description_t * dsc); unsigned int fsdp_get_global_conn_address_ttl (const fsdp_description_t * dsc); unsigned int fsdp_get_global_conn_address_count (const fsdp_description_t * dsc); /** * Get the number of bandwidth modifiers specified for this session. * * @param dsc SDP description object. * @return number of bandwidth modifiers. **/ unsigned int fsdp_get_bw_modifier_count (const fsdp_description_t * dsc); /** * Get the bandwidth modifier type for the session. * * @param dsc SDP description object. * @param index number of bandwidth modifier. * * @return global bandwidth modifier type. * @retval FSDP_BW_MOD_TYPE_UNDEFINED if no global bandwith modifier * type is defined or invalid index. * @retval FSDP_BW_MOD_TYPE_UNKNOWN if an unknown bandwith modifier is * specified or an invalid index is provided. In this case * fsdp_get_bw_modifer_type_unknown() can be called to get the * modifier as a character string. **/ fsdp_bw_modifier_type_t fsdp_get_bw_modifier_type (const fsdp_description_t * dsc, unsigned int index); /** * Get the textual bandwidth modifier type when it is unknown. * * @param dsc SDP description object. * @param index number of bandwidth modifier. * * @return global bandwidth modifier type. * @retval empty string if the provided bandwidth type is not unknown, * the provided index is invalid or or there was a parse error. **/ const char *fsdp_get_bw_modifier_type_unknown (const fsdp_description_t * dsc, unsigned int index); /** * Get the value for the bandwidth modifier. * * @param dsc SDP description object. * @param index number of bandwidth modifier. * @return global bandwidth value. * @retval 0 if no bandwidth is specified for this session or an * invalid index has been provided. **/ unsigned long int fsdp_get_bw_value (const fsdp_description_t * dsc, unsigned int index); /** * Get the number of time periods specified for this session * * @param dsc SDP description object. * @return number of time periods **/ unsigned long int fsdp_get_period_count (const fsdp_description_t * dsc); /** * Get the start time for the period selected by index. * * @param dsc SDP description object. * @param index number of time period. Note that this index follows the * traditional C convention: from 0 to fsdp_get_period_count() - 1. * @return start time * @retval 0 if an invalid index is provided. **/ time_t fsdp_get_period_start (const fsdp_description_t * dsc, unsigned int index); /** * Get the stop time for the period selected by index. * * @param dsc SDP description object. * @param index number of time period. Note that this index follows the * traditional C convention: from 0 to fsdp_get_period_count() - 1. * @return stop time * @retval 0 if an invalid index is provided. **/ time_t fsdp_get_period_stop (const fsdp_description_t * dsc, unsigned int index); /** * Get the number of repeats for the period selected by index. * * @param dsc SDP description object. * @param index number of the period. Note that this index follows the * traditional C convention: from 0 to fsdp_get_period_count() - 1. * @return number of repeats * @retval 0 if an invalid index is provided. **/ unsigned int fsdp_get_period_repeats_count (const fsdp_description_t * dsc, unsigned int index); /** * Get the interval time of the repeat selected by rindex for the * period selected by index. * * @param dsc SDP description object. * @param index number of time period. Note that this index follows the * traditional C convention: from 0 to fsdp_get_period_count() - 1. * @param rindex number of repeat * @return interval time * @retval 0 if an invalid index is provided. **/ unsigned long int fsdp_get_period_repeat_interval (const fsdp_description_t * dsc, unsigned int index, unsigned int rindex); /** * Get the duration of the repeat selected by rindex for the period * selected by index. * * @param dsc SDP description object. * @param index number of time period. Note that this index follows the * traditional C convention: from 0 to fsdp_get_period_count() - 1. * @param rindex number of repeat * @return duration * @retval 0 if an invalid index is provided. **/ unsigned long int fsdp_get_period_repeat_duration (const fsdp_description_t * dsc, unsigned int index, unsigned int rindex); /** * Get the offsets of the repeat selected by rindex for the period * selected by index. * * @param dsc SDP description object. * @param index number of time period. Note that this index follows the * traditional C convention: from 0 to fsdp_get_period_count() - 1. * @param rindex number of repeat * @return array of offsets * @retval NULL if an invalid index is provided. **/ const unsigned long int *fsdp_get_period_repeat_offsets (const fsdp_description_t * dsc, unsigned int index, unsigned int rindex); /** * Get the encryption method defined for this session. * * @param dsc SDP description object. * @return encryption method. FSDP_ENCRYPTION_METHOD_UNDEFINED if no * encryption method is specified. **/ fsdp_encryption_method_t fsdp_get_encryption_method (const fsdp_description_t * dsc); /** * Get the encryption key or a URI pointing to the encryption key for * this session. * * @param dsc SDP description object. * @return encryption key unless FSDP_ENCRYPTION_METHOD_URI is * specified, in which case a URI pointing to the key is returned. If * the global encryption method is undefined, NULL is returned. **/ const char *fsdp_get_encryption_content (const fsdp_description_t * dsc); /** * Get timezone adjustments. * * @param dsc SDP description object. * @return string with list of timezone adjustments * @retval NULL if no timezone adjustment list was specified or there * was a parse error. **/ const char *fsdp_get_timezone_adj (const fsdp_description_t * dsc); /** * **/ unsigned int fsdp_get_unidentified_attribute_count (const fsdp_description_t * dsc); /** * **/ const char *fsdp_get_unidentified_attribute (const fsdp_description_t * dsc, unsigned int index); /** * **/ unsigned int fsdp_get_media_rtpmap_count (const fsdp_media_description_t * mdsc); /** * **/ const char *fsdp_get_media_rtpmap_payload_type (const fsdp_media_description_t * mdsc, unsigned int index); /** * **/ const char *fsdp_get_media_rtpmap_encoding_name (const fsdp_media_description_t * mdsc, unsigned int index); /** * **/ unsigned int fsdp_get_media_rtpmap_clock_rate (const fsdp_media_description_t * mdsc, unsigned int index); /** * **/ const char *fsdp_get_media_rtpmap_encoding_parameters (const fsdp_description_t * mdsc, unsigned int index); /** * Get the value of the session attribute specified in * att. This function works for all the session * attributes whose value is a character string. These attributes are * defined in the session_string_attribute_t enumerated type. * * @param dsc SDP description object. * @param att attribute to get. * * @return value of the attribute att. * @retval NULL if the attribute was not specified or there was a * parse error or an invalid att is given. **/ const char *fsdp_get_str_att (const fsdp_description_t * dsc, fsdp_session_str_att_t att); /** * **/ unsigned int fsdp_get_sdplang_count (const fsdp_description_t * dsc); /** * **/ const char *fsdp_get_sdplang (const fsdp_description_t * dsc, unsigned int index); /** * Get the mode of the conference, specified with attributes sendrecv, * sendonly, recvonly and inactive. * * @param dsc SDP description object. * @return send/rec conference mode. * @retval FSDP_SENDRECV_UNDEFINED if conference mode not provided. **/ fsdp_sendrecv_mode_t fsdp_get_sendrecv_mode (const fsdp_description_t * dsc); /** * Get the type of conference, such as broadcast, meeting, moderated, * test or H332. * * @param dsc SDP description object. * @return conference type. * @retval FSDP_SESSION_TYPE_UNDEFINED if conference type not provided. **/ fsdp_session_type_t fsdp_get_session_type (const fsdp_description_t * dsc); /** * **/ unsigned int fsdp_get_media_count (const fsdp_description_t * dsc); /** * **/ const fsdp_media_description_t *fsdp_get_media (const fsdp_description_t * dsc, unsigned int index); /** * **/ fsdp_media_t fsdp_get_media_type (const fsdp_media_description_t * dsc); /** * **/ unsigned int fsdp_get_media_port (const fsdp_media_description_t * dsc); unsigned int fsdp_get_media_port_count (const fsdp_media_description_t * dsc); /** * **/ fsdp_transport_protocol_t fsdp_get_media_transport_protocol (const fsdp_media_description_t * dsc); /** * **/ const char *fsdp_get_media_formats (const fsdp_media_description_t * dsc); /** * **/ unsigned int fsdp_get_media_formats_count (const fsdp_media_description_t * dsc); /** * **/ const char *fsdp_get_media_format (const fsdp_media_description_t * dsc, unsigned int index); /** * **/ const char *fsdp_get_media_title (const fsdp_media_description_t * dsc); /** * **/ fsdp_network_type_t fsdp_get_media_network_type (const fsdp_media_description_t * dsc); /** * **/ fsdp_address_type_t fsdp_get_media_address_type (const fsdp_media_description_t * dsc); /** * **/ const char *fsdp_get_media_address (const fsdp_media_description_t * dsc); unsigned int fsdp_get_media_address_ttl (const fsdp_media_description_t * mdsc); unsigned int fsdp_get_media_address_count (const fsdp_media_description_t * mdsc); /** * **/ fsdp_bw_modifier_type_t fsdp_get_media_bw_modifier_type (const fsdp_media_description_t * dsc, unsigned int index); /** * **/ const char *fsdp_get_media_bw_modifier_type_unknown (const fsdp_media_description_t * dsc, unsigned int index); /** * **/ unsigned long int fsdp_get_media_bw_value (const fsdp_media_description_t * dsc, unsigned int index); /** * **/ fsdp_encryption_method_t fsdp_get_media_encryption_method (const fsdp_media_description_t * dsc); /** * **/ const char *fsdp_get_media_encryption_content (const fsdp_media_description_t * dsc); /** * **/ unsigned int fsdp_get_media_ptime (const fsdp_media_description_t * dsc); /** * **/ unsigned int fsdp_get_media_maxptime (const fsdp_media_description_t * dsc); /** * **/ unsigned int fsdp_get_media_fmtp_count (const fsdp_media_description_t * mdsc); /** * **/ const char *fsdp_get_media_fmtp (const fsdp_media_description_t * mdsc, unsigned int index); /** * **/ unsigned int fsdp_get_media_sdplang_count (const fsdp_media_description_t * dsc); /** * **/ const char *fsdp_get_media_sdplang (const fsdp_media_description_t * dsc, unsigned int index); /** * **/ unsigned int fsdp_get_media_lang_count (const fsdp_media_description_t * dsc); /** * **/ const char *fsdp_get_media_lang (const fsdp_media_description_t * dsc, unsigned int index); unsigned int fsdp_get_control_count (const fsdp_description_t * dsc); const char *fsdp_get_control (const fsdp_description_t * dsc, unsigned int index); const char *fsdp_get_range (const fsdp_description_t * dsc); unsigned int fsdp_get_media_control_count (const fsdp_media_description_t * mdsc); char *fsdp_get_media_control (const fsdp_media_description_t * mdsc, unsigned int index); char *fsdp_get_media_range (const fsdp_media_description_t * mdsc); /** * **/ fsdp_orient_t fsdp_get_media_orient (const fsdp_media_description_t * dsc); /** * **/ fsdp_sendrecv_mode_t fsdp_get_media_sendrecv (const fsdp_media_description_t * dsc); /** * **/ float fsdp_get_media_framerate (const fsdp_media_description_t * dsc); /** * **/ unsigned int fsdp_get_media_quality (const fsdp_media_description_t * dsc); /** * **/ unsigned int fsdp_get_media_rtcp_port (const fsdp_media_description_t * dsc); /** * **/ fsdp_network_type_t fsdp_get_media_rtcp_network_type (const fsdp_media_description_t * dsc); /** * **/ fsdp_address_type_t fsdp_get_media_rtcp_address_type (const fsdp_media_description_t * dsc); /** * **/ const char *fsdp_get_media_rtcp_address (const fsdp_media_description_t * dsc); /** * **/ unsigned int fsdp_get_media_unidentified_attribute_count (const fsdp_media_description_t * mdsc); /** * **/ const char *fsdp_get_media_unidentified_attribute (const fsdp_media_description_t * mdsc, unsigned int index); /** @} *//* closes parser group */ END_C_DECLS #endif /* FSDP_PARSER_H */