SIP_SENDMSG(3SIP)SIP_SENDMSG(3SIP)NAMEsip_sendmsg - send an outbound SIP message to the SIP stack for pro‐
cessing
SYNOPSIS
cc [ flag ... ] file ... -lsip [ library ... ]
#include <sip.h>
int sip_sendmsg(sip_conn_object_t obj, sip_msg_t sip_msg,
sip_dialog_t dialog, uint32_t flags);
DESCRIPTION
The sip_sendmsg() function is used to send an outbound SIP message
sip_msg to the SIP stack on its way to the peer. The connection object
for the SIP message is passed as obj. The caller also provides the dia‐
log associated with the message, if one exists. The value of flags is
the result of ORing the following, as required:
SIP_SEND_STATEFUL
Send the request or response statefully. This
results in the stack creating and maintaining a
transaction for this request/response. If this
flag is not set transactions are not created for
the request/response.
SIP_DIALOG_ON_FORK
When this flag is set, the stack may create mul‐
tiple dialogs for a dialog completing response.
This may result due to forking of the dialog cre‐
ating request. If this flag is not set, the first
response to a dialog creating request creates a
dialog, but subsequent ones do not. It is only
meaningful if the stack is configured to maintain
dialogs.
RETURN VALUES
The sip_sendmsg() function returns 0 on success and the appropriate
error on failure.
The value of errno is not changed by these calls in the event of an
error.
ERRORS
The sip_sendmsg() function can return one of the following errors on
failure:
EINVAL
If a message is being statefully sent and the branchid in the
VIA header does not conform to RFC 3261 or when accessing
CSEQ header while creating a transaction.
ENOENT
If a message is being statefully sent, error getting the CSEQ
header while creating a transaction.
EPROTO
If a message is being statefully sent, error getting the CSEQ
value while creating a transaction.
ENOMEM
If the message is being statefully sent, error allocating
memory for creating or adding a transaction or during trans‐
action related processing.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌────────────────────┬─────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────┼─────────────────┤
│Interface Stability │ Committed │
├────────────────────┼─────────────────┤
│MT-Level │ MT-Safe │
└────────────────────┴─────────────────┘
SEE ALSOlibsip(3LIB)
Jan 25, 2007 SIP_SENDMSG(3SIP)
