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(7) for descriptions of the following attributes:


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

SEE ALSO

sdp_parse(3COMMPUTIL), libcommputil(3LIB), attributes(7)

October 12, 2007
SDP_FIND_ATTRIBUTE(3COMMPUTIL)