int sip_rewrite_to(osip_message_t* osip_msg, char* host, char* username)
{
osip_to_t* from = osip_message_get_to(osip_msg);
if (NULL != from)
{
osip_uri_t* uri = osip_to_get_url(from);
if (NULL != uri)
{
sip_rewrite_osip_uri(uri, host, username);
return RC_OK;
}
}
return RC_ERR;
}
/* code (entry point) */
static int plugin_regex_process(sip_ticket_t *ticket) {
int sts=STS_SUCCESS;
osip_uri_t *req_url;
osip_uri_t *to_url;
osip_generic_param_t *r=NULL;
/* plugin loaded and not configured, return with success */
if (plugin_cfg.regex_pattern.used==0) return STS_SUCCESS;
if (plugin_cfg.regex_replace.used==0) return STS_SUCCESS;
DEBUGC(DBCLASS_PLUGIN,"plugin entered");
req_url=osip_message_get_uri(ticket->sipmsg);
to_url=osip_to_get_url(ticket->sipmsg);
/* only outgoing direction is handled */
sip_find_direction(ticket, NULL);
if (ticket->direction != DIR_OUTGOING)
return STS_SUCCESS;
/* only INVITE and ACK are handled */
if (!MSG_IS_INVITE(ticket->sipmsg) && !MSG_IS_ACK(ticket->sipmsg))
return STS_SUCCESS;
/* expire old cache entries */
expire_redirected_cache(&redirected_cache);
/* REQ URI with username must exist, prefix string must exist */
if (!req_url || !req_url->username)
return STS_SUCCESS; /* ignore */
/* Loop avoidance:
* If this INVITE has already been redirected by a prior 302
* moved response a "REDIRECTED_TAG" parameter should be present in the
* URI.
* Hopefully all UAs (Clients) do honor RFC3261 and copy the
* *full* URI form the contact header into the new request header
* upon a 3xx response.
*/
if (req_url) {
osip_uri_param_get_byname(&(req_url->url_params), REDIRECTED_TAG, &r);
if (r && r->gvalue && strcmp(r->gvalue,REDIRECTED_VAL)== 0) {
DEBUGC(DBCLASS_PLUGIN,"Packet has already been processed (ReqURI)");
return STS_SUCCESS;
}
}
if (to_url) {
osip_uri_param_get_byname(&(to_url->url_params), REDIRECTED_TAG, &r);
if (r && r->gvalue && strcmp(r->gvalue,REDIRECTED_VAL)== 0) {
DEBUGC(DBCLASS_PLUGIN,"Packet has already been processed (ToURI)");
return STS_SUCCESS;
}
}
/*
* The SIP message is to be processed
*/
/* outgoing INVITE request */
if (MSG_IS_INVITE(ticket->sipmsg)) {
DEBUGC(DBCLASS_PLUGIN,"processing INVITE");
sts=plugin_regex_redirect(ticket);
}
/* outgoing ACK request: is result of a local 3xx answer (moved...)
*
* Only consume that particular ACK that belongs to a sent 302 answer,
* nothing else. Otherwise the ACK from the redirected call will get
* consumed as well and causes the call to be aborted (timeout).
* We keep a cache with Call-Ids of such "302 moved" dialogs.
* Only consume such ACKs that are part of such a dialog.
*/
else if (MSG_IS_ACK(ticket->sipmsg)) {
if (is_in_redirected_cache(&redirected_cache, ticket) == STS_TRUE) {
DEBUGC(DBCLASS_PLUGIN,"processing ACK (consume it)");
sts=STS_SIP_SENT; /* eat up the ACK that was directed to myself */
}
}
return sts;
}
