cc [ flag...] file... -lcommputil [ library...] #include <sdp.h> sdp_attr_t *sdp_find_attribute(sdp_attr_t *attr, const char *name);
The sdp_find_attribute() function searches the attribute list attr for the specified attribute name. If the attribute is found it returns the pointer to that attribute. Otherwise it returns NULL.
The sdp_find_attribute() function returns the attribute (sdp_attr_t *) on success and NULL when the search fails or when mandatory input parameters are NULL.
Example 1 An (incomplete) SDP description that contains one media section: audio.
m=audio 49170 RTP/AVP 0 8
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=sendonly
a=ptime:10000
a=maxptime:20000
/*
* Assuming that above description is parsed using sdp_parse and that
* the parsed structure is in "session" sdp_session_t structure.
*/
sdp_attr_t *ptime;
sdp_attr_t *max_ptime;
sdp_media_t *media = session->s_media;
if ((ptime = sdp_find_attribute(media->m_attr, "ptime")) == NULL)
/* ptime attribute not present */
else if((max_ptime = sdp_find_attribute(media->m_attr,
"maxptime")) == NULL)
/* max_ptime attribute not present */
See attributes(5) for descriptions of the following attributes:
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libcommputil(3LIB), sdp_parse(3COMMPUTIL), attributes(5)