SDP_FIND_ATTRIBUTE(3COMMPUTIL)
Communication Protocol Parser Utilities Library Functions


NAME


sdp_find_attribute - find the attribute from the attribute list

SYNOPSIS


cc [ flag...] file... -lcommputil [ library...]
#include <sdp.h>

sdp_attr_t *sdp_find_attribute(sdp_attr_t *attr, const char *name);


DESCRIPTION


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.

RETURN VALUES


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.

EXAMPLES


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 */


ATTRIBUTES


See attributes(5) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Committed |
+--------------------+-----------------+
|MT-Level | Safe |
+--------------------+-----------------+

SEE ALSO


libcommputil(3LIB), sdp_parse(3COMMPUTIL), attributes(5)


October 12, 2007 SDP_FIND_ATTRIBUTE(3COMMPUTIL)