Module: sip-router Branch: master Commit: ea6338ea145a393f147ea31739a4d7580c6e11da URL: http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commit;h=ea6338ea...
Author: Daniel-Constantin Mierla miconda@gmail.com Committer: Daniel-Constantin Mierla miconda@gmail.com Date: Wed Dec 21 15:15:25 2011 +0100
sdpops: added sdp_remove_media(type)
- remove the media streams matching the type - e.g., sdp_remove_media("video");
---
modules/sdpops/sdpops_mod.c | 104 +++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 104 insertions(+), 0 deletions(-)
diff --git a/modules/sdpops/sdpops_mod.c b/modules/sdpops/sdpops_mod.c index 2dc8aaa..be2e840 100644 --- a/modules/sdpops/sdpops_mod.c +++ b/modules/sdpops/sdpops_mod.c @@ -46,6 +46,7 @@ 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_with_codecs_by_id(sip_msg_t* msg, char* codec, char *bar); static int w_sdp_with_codecs_by_name(sip_msg_t* msg, char* codec, char *bar); +static int w_sdp_remove_media(sip_msg_t* msg, char* media, char *bar); static int w_sdp_print(sip_msg_t* msg, char* level, char *bar);
static int mod_init(void); @@ -65,6 +66,8 @@ static cmd_export_t cmds[] = { 2, fixup_spve_spve, 0, ANY_ROUTE}, {"sdp_with_media", (cmd_function)w_sdp_with_media, 1, fixup_spve_null, 0, ANY_ROUTE}, + {"sdp_remove_media", (cmd_function)w_sdp_remove_media, + 1, fixup_spve_null, 0, ANY_ROUTE}, {"sdp_with_codecs_by_id", (cmd_function)w_sdp_with_codecs_by_id, 1, fixup_spve_null, 0, ANY_ROUTE}, {"sdp_with_codecs_by_name", (cmd_function)w_sdp_with_codecs_by_name, @@ -659,6 +662,107 @@ static int w_sdp_with_media(sip_msg_t* msg, char* media, char *bar) }
/** + * @brief remove streams matching the m='media' + * @return -1 - error; 0 - not found; >=1 - found + */ +static int sdp_remove_media(sip_msg_t *msg, str *media) +{ + 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; + sdp_stream_cell_t* nxt_stream; + int ret = 0; + char *dstart = NULL; + int dlen = 0; + struct lump *anchor; + + if(parse_sdp(msg) < 0) { + LM_ERR("Unable to parse sdp\n"); + return -1; + } + + LM_DBG("attempting to search for media type: [%.*s]\n", + media->len, media->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 - media [%.*s]\n", + sdp_stream_num, sdp_session_num, + sdp_stream->media.len, sdp_stream->media.s); + if(media->len==sdp_stream->media.len + && strncasecmp(sdp_stream->media.s, media->s, + media->len)==0) + { + /* found - remove */ + LM_DBG("removing media stream: %.*s", media->len, media->s); + nxt_stream = get_sdp_stream(msg, sdp_session_num, + sdp_stream_num+1); + /* skip back 'm=' */ + dstart = sdp_stream->media.s - 2; + if(!nxt_stream) { + /* delete to end of sdp */ + dlen = (int)(sdp->text.s + sdp->text.len - dstart); + } else { + /* delete to start of next stream */ + dlen = (int)(nxt_stream->media.s - 2 - dstart); + } + anchor = del_lump(msg, dstart - msg->buf, dlen, 0); + if (anchor == NULL) { + LM_ERR("failed to remove media type [%.*s]\n", + media->len, media->s); + return -1; + } + + ret++; + } + sdp_stream_num++; + } + sdp_session_num++; + } + + return ret; +} + + +/** + * + */ +static int w_sdp_remove_media(sip_msg_t* msg, char* media, char *bar) +{ + str lmedia = {0, 0}; + + if(media==0) + { + LM_ERR("invalid parameters\n"); + return -1; + } + + if(fixup_get_svalue(msg, (gparam_p)media, &lmedia)!=0) + { + LM_ERR("unable to get the media value\n"); + return -1; + } + + if(sdp_remove_media(msg, &lmedia)<=0) + return -1; + return 1; +} + + +/** * */ int sdp_with_codecs_by_id(sip_msg_t* msg, str* codecs)
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Daniel-Constantin Mierla