[sr-dev] git:master: sdpops: added functions to keep in SDP only a set of codecs

Module: sip-router Branch: master Commit: 9ed8d781d8ac8a0fba808d2f62162f267a065ec4 URL: http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commit;h=9ed8d78… Author: Daniel-Constantin Mierla &lt;miconda(a)gmail.com&gt; Committer: Daniel-Constantin Mierla &lt;miconda(a)gmail.com&gt; Date: Fri Aug 19 14:41:43 2011 +0200 sdpops: added functions to keep in SDP only a set of codecs - sdp_keep_codecs_by_id(idlist) - keep in SDP only the codecs that are also in idlist, parameter being a list of codec integer IDs - sdp_keep_codecs_by_name(list) - keep in SDP only the codecs that are also in list, parameter being a list of codec names --- modules/sdpops/sdpops_mod.c | 183 +++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 183 insertions(+), 0 deletions(-) diff --git a/modules/sdpops/sdpops_mod.c b/modules/sdpops/sdpops_mod.c index 9e47a0c..29ee993 100644 --- a/modules/sdpops/sdpops_mod.c +++ b/modules/sdpops/sdpops_mod.c @@ -41,6 +41,8 @@ MODULE_VERSION static int w_sdp_remove_codecs_by_id(sip_msg_t* msg, char* codecs, char *bar); static int w_sdp_remove_codecs_by_name(sip_msg_t* msg, char* codecs, char *bar); +static int w_sdp_keep_codecs_by_id(sip_msg_t* msg, char* codecs, char *bar); +static int w_sdp_keep_codecs_by_name(sip_msg_t* msg, char* codecs, char *bar); static int w_sdp_with_media(sip_msg_t* msg, char* media, char *bar); static int w_sdp_print(sip_msg_t* msg, char* level, char *bar); @@ -51,6 +53,10 @@ static cmd_export_t cmds[] = { 1, fixup_spve_null, 0, ANY_ROUTE}, {"sdp_remove_codecs_by_name", (cmd_function)w_sdp_remove_codecs_by_name, 1, fixup_spve_null, 0, ANY_ROUTE}, + {"sdp_keep_codecs_by_id", (cmd_function)w_sdp_keep_codecs_by_id, + 1, fixup_spve_null, 0, ANY_ROUTE}, + {"sdp_keep_codecs_by_name", (cmd_function)w_sdp_keep_codecs_by_name, + 1, fixup_spve_null, 0, ANY_ROUTE}, {"sdp_with_media", (cmd_function)w_sdp_with_media, 1, fixup_spve_null, 0, ANY_ROUTE}, {"sdp_print", (cmd_function)w_sdp_print, @@ -169,6 +175,42 @@ int sdp_remove_str_codec_id_attrs(sip_msg_t* msg, /** * */ +int sdp_codec_in_str(str *allcodecs, str* codec) +{ + int i; + int cmp; + + if(allcodecs==NULL || codec==NULL + || allcodecs->len<=0 || codec->len<=0) + return 0; + + cmp = 1; + for(i=0; i<allcodecs->len; i++) { + if(cmp==1) { + if(codec->len <= allcodecs->len-i) { + if(strncmp(&allcodecs->s[i], codec->s, codec->len)==0) { + if(&allcodecs->s[i+codec->len] + == &allcodecs->s[allcodecs->len] + || allcodecs->s[i+codec->len] == ' ') { + /* match */ + return 1; + } + } + } + } + if(allcodecs->s[i]==' ') + cmp = 1; + else + cmp = 0; + } + + return 0; +} + + +/** + * + */ int sdp_remove_str_codec_id(sip_msg_t* msg, str *allcodecs, str* rmcodec) { int i; @@ -321,6 +363,7 @@ int sdp_remove_codecs_by_name(sip_msg_t* msg, str* codecs) return 0; } + /** * */ @@ -345,6 +388,140 @@ static int w_sdp_remove_codecs_by_name(sip_msg_t* msg, char* codecs, char* bar) return 1; } +/** + * + */ +int sdp_keep_codecs_by_id(sip_msg_t* msg, str* codecs) +{ + sdp_info_t *sdp = NULL; + int sdp_session_num; + int sdp_stream_num; + sdp_session_cell_t* sdp_session; + sdp_stream_cell_t* sdp_stream; + str sdp_codecs; + str tmp_codecs; + str rm_codec; + + if(parse_sdp(msg) < 0) { + LM_ERR("Unable to parse sdp\n"); + return -1; + } + + LM_ERR("attempting to remove codecs from sdp: [%.*s]\n", + codecs->len, codecs->s); + + sdp = (sdp_info_t*)msg->body; + + sdp_session_num = 0; + for(;;) + { + sdp_session = get_sdp_session(msg, sdp_session_num); + if(!sdp_session) break; + sdp_stream_num = 0; + for(;;) + { + sdp_stream = get_sdp_stream(msg, sdp_session_num, sdp_stream_num); + if(!sdp_stream) break; + + LM_DBG("stream %d of %d - payloads [%.*s]\n", + sdp_stream_num, sdp_session_num, + sdp_stream->payloads.len, sdp_stream->payloads.s); + sdp_codecs = sdp_stream->payloads; + tmp_codecs = sdp_stream->payloads; + while(str_find_token(&tmp_codecs, &rm_codec, ' ')==0 + && rm_codec.len>0) + { + tmp_codecs.len -=(int)(&rm_codec.s[rm_codec.len]-tmp_codecs.s); + tmp_codecs.s = rm_codec.s + rm_codec.len; + + if(sdp_codec_in_str(codecs, &rm_codec)==0) { + LM_DBG("codecs [%.*s] - remove [%.*s]\n", + sdp_codecs.len, sdp_codecs.s, + rm_codec.len, rm_codec.s); + sdp_remove_str_codec_id(msg, &sdp_codecs, &rm_codec); + sdp_remove_str_codec_id_attrs(msg, sdp_stream, &rm_codec); + } + } + sdp_stream_num++; + } + sdp_session_num++; + } + + return 0; +} + +/** + * + */ +static int w_sdp_keep_codecs_by_id(sip_msg_t* msg, char* codecs, char* bar) +{ + str lcodecs = {0, 0}; + + if(codecs==0) + { + LM_ERR("invalid parameters\n"); + return -1; + } + + if(fixup_get_svalue(msg, (gparam_p)codecs, &lcodecs)!=0) + { + LM_ERR("unable to get the list of codecs\n"); + return -1; + } + + if(sdp_keep_codecs_by_id(msg, &lcodecs)<0) + return -1; + return 1; +} + +/** + * + */ +int sdp_keep_codecs_by_name(sip_msg_t* msg, str* codecs) +{ + str idslist; + + if(parse_sdp(msg) < 0) { + LM_ERR("Unable to parse sdp\n"); + return -1; + } + + LM_ERR("attempting to keep codecs in sdp: [%.*s]\n", + codecs->len, codecs->s); + + if(sdpops_build_ids_list(codecs, &idslist)<0) + return -1; + + if(sdp_keep_codecs_by_id(msg, &idslist)<0) + return -1; + + return 0; + +} + +/** + * + */ +static int w_sdp_keep_codecs_by_name(sip_msg_t* msg, char* codecs, char* bar) +{ + str lcodecs = {0, 0}; + + if(codecs==0) + { + LM_ERR("invalid parameters\n"); + return -1; + } + + if(fixup_get_svalue(msg, (gparam_p)codecs, &lcodecs)!=0) + { + LM_ERR("unable to get the list of codecs\n"); + return -1; + } + + if(sdp_keep_codecs_by_name(msg, &lcodecs)<0) + return -1; + return 1; +} /** * @brief check 'media' matches the value of any 'm=value ...' lines @@ -419,6 +596,9 @@ static int w_sdp_with_media(sip_msg_t* msg, char* media, char *bar) } +/** + * + */ static int w_sdp_print(sip_msg_t* msg, char* level, char *bar) { sdp_info_t *sdp = NULL; @@ -441,6 +621,9 @@ static int w_sdp_print(sip_msg_t* msg, char* level, char *bar) return 1; } +/** + * + */ int bind_sdpops(struct sdpops_binds *sob){ if (sob == NULL) { LM_WARN("bind_sdpops: Cannot load sdpops API into a NULL pointer\n");