'\" te
.\"  Copyright (c) 2007, Sun Microsystems, Inc.  All Rights Reserved
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.TH SIP_GET_TRANS 3SIP "Jan 25, 2007"
.SH NAME
sip_get_trans \- lookup a transaction
.SH SYNOPSIS
.LP
.nf
\fBcc\fR [ \fIflag\fR ... ] \fIfile\fR ... \fB-lsip\fR [ \fIlibrary\fR ... ]
#include <sip.h>

\fBconst struct sip_xaction *\fR\fIsip_get_trans\fR(\fBsip_msg_t\fR \fIsip_msg\fR, \fBint\fR \fIwhich\fR,
     \fBint *\fR\fIerror\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBsip_get_trans()\fR transaction for the SIP message \fIsip_msg\fR. A
transaction is not freed if there are any references on it.
.sp
.LP
The transaction type should be specified as one of the following:
.br
.in +2
\fBSIP_CLIENT_TRANSACTON\fR - lookup a client transaction
.in -2
.br
.in +2
\fBSIP_SERVER_TRANSACTON\fR - lookup a server transaction
.in -2
.sp
.LP
The \fBsip_get_trans()\fR function matches a transaction to a message as
specified in RFC 3261, sections 17.1.3 and 17.2.3. The \fBsip_get_trans()\fR
function holds a reference to the returned transaction. The caller must release
this reference after use.
.SH RETURN VALUES
.sp
.LP
The \fBsip_get_trans()\fR function returns the required value on success or
\fINULL\fR on failure.
.sp
.LP
The value of \fBerrno\fR is not changed by these calls in the event of an
error.
.SH ERRORS
.sp
.LP
On success, the value of the location pointed to by \fIerror\fR is set to
\fB0\fR.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Committed
_
MT-Level	MT-Safe
.TE

.SH SEE ALSO
.sp
.LP
.BR libsip (3LIB)