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Ticket 831: Quick/initial patch for automatic transport switching (to TCP) when a SIP request size is larger than 1300 and is about to send via UDP. 

git-svn-id: https://svn.pjsip.org/repos/pjproject/branches/projects/sipit24@2703 74dad513-b988-da41-8d7b-12977e46ad98
This commit is contained in:
Nanang Izzuddin 2009-05-17 15:59:31 +00:00
parent 9372e496ff
commit f46451ae6d
1 changed files with 34 additions and 0 deletions
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34
pjsip/src/pjsip/sip_util.c
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@ -1181,6 +1181,40 @@ stateless_send_resolver_callback( pj_status_t status,
/* Copy server addresses */
pj_memcpy( &stateless_data->addr, addr, sizeof(pjsip_server_addresses));
/* RFC 3261 section 18.1.1:
* If a request is within 200 bytes of the path MTU, or if it is larger
* than 1300 bytes and the path MTU is unknown, the request MUST be sent
* using an RFC 2914 [43] congestion controlled transport protocol, such
* as TCP.
*/
if (stateless_data->tdata->msg->type == PJSIP_REQUEST_MSG &&
addr->count > 0 &&
addr->entry[0].type == PJSIP_TRANSPORT_UDP)
{
char buf[1500];
int len;
/* Check if request message is larger than 1300 bytes. */
len = pjsip_msg_print(stateless_data->tdata->msg, buf, 1300);
if (len < 0) {
int i;
int count = stateless_data->addr.count;
/* Insert "TCP version" of resolved UDP addresses at the
* beginning.
*/
if (count * 2 > PJSIP_MAX_RESOLVED_ADDRESSES)
count = PJSIP_MAX_RESOLVED_ADDRESSES / 2;
for (i = 0; i < count; ++i) {
pj_memcpy(&stateless_data->addr.entry[i+count],
&stateless_data->addr.entry[i],
sizeof(stateless_data->addr.entry[0]));
stateless_data->addr.entry[i].type = PJSIP_TRANSPORT_TCP;
}
stateless_data->addr.count = count * 2;
}
}
/* Process the addresses. */
stateless_send_transport_cb( stateless_data, stateless_data->tdata,
-PJ_EPENDING);