'\" te
.\" Copyright (c) 2007, Sun Microsystems Inc. All Rights Reserved.
.TH sdp_find_attribute 3COMMPUTIL "12 Oct 2007" "SunOS 5.11" "Communication Protocol Parser Utilities Library Functions"
.SH NAME
sdp_find_attribute \- find the attribute from the attribute list
.SH SYNOPSIS
.LP
.nf
\fBcc\fR [ \fIflag\fR...] \fIfile\fR... -\fBlcommputil\fR [ \fIlibrary\fR...]
#include <sdp.h>

\fBsdp_attr_t *\fR\fBsdp_find_attribute\fR(\fBsdp_attr_t *\fR\fIattr\fR, \fBconst char *\fR\fIname\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBsdp_find_attribute()\fR function searches the attribute list \fIattr\fR for the specified attribute \fIname\fR. If the attribute is found it returns the pointer to that attribute. Otherwise it returns \fINULL\fR.
.SH RETURN VALUES
.sp
.LP
The \fBsdp_find_attribute()\fR function returns the attribute (\fBsdp_attr_t *\fR) on success and \fINULL\fR when the search fails or when mandatory input parameters are \fINULL\fR.
.SH EXAMPLES
.LP
\fBExample 1 \fRAn (incomplete) SDP description that contains one media section: audio.
.sp
.in +2
.nf
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 */
.fi
.in -2

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
Interface StabilityCommitted
_
MT-LevelSafe
.TE

.SH SEE ALSO
.sp
.LP
\fBlibcommputil\fR(3LIB), \fBsdp_parse\fR(3COMMPUTIL), \fBattributes\fR(5)