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Send all responses to an INVITE reliably, so that we retransmit if we don't get an ACK and

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also fail if we don't get the very same precious ACK. Based on patch by tsearle, with
my own additions.

(closes issue #12951)

Reported by: tsearle
Patches: 
      busy_retransmit.patch uploaded by tsearle (license 373)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@126516 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Olle Johansson
2008-06-30 12:50:55 +00:00
parent 31a9e3085d
commit af5c8fedce
1 changed files with 11 additions and 11 deletions
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channels/chan_sip.c
+11 -11
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@@ -3924,7 +3924,7 @@ static int sip_indicate(struct ast_channel *ast, int condition, const void *data
break;
case AST_CONTROL_BUSY:
if (ast->_state != AST_STATE_UP) {
transmit_response(p, "486 Busy Here", &p->initreq);
transmit_response_reliable(p, "486 Busy Here", &p->initreq);
p->invitestate = INV_COMPLETED;
sip_alreadygone(p);
ast_softhangup_nolock(ast, AST_SOFTHANGUP_DEV);
@@ -3934,7 +3934,7 @@ static int sip_indicate(struct ast_channel *ast, int condition, const void *data
break;
case AST_CONTROL_CONGESTION:
if (ast->_state != AST_STATE_UP) {
transmit_response(p, "503 Service Unavailable", &p->initreq);
transmit_response_reliable(p, "503 Service Unavailable", &p->initreq);
p->invitestate = INV_COMPLETED;
sip_alreadygone(p);
ast_softhangup_nolock(ast, AST_SOFTHANGUP_DEV);
@@ -13815,7 +13815,7 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
being able to call yourself */
/* If pedantic is on, we need to check the tags. If they're different, this is
in fact a forked call through a SIP proxy somewhere. */
transmit_response(p, "482 Loop Detected", req);
transmit_response_reliable(p, "482 Loop Detected", req);
p->invitestate = INV_COMPLETED;
sip_scheddestroy(p, DEFAULT_TRANS_TIMEOUT);
return 0;
@@ -13823,7 +13823,7 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
if (!ast_test_flag(req, SIP_PKT_IGNORE) && p->pendinginvite) {
/* We already have a pending invite. Sorry. You are on hold. */
transmit_response(p, "491 Request Pending", req);
transmit_response_reliable(p, "491 Request Pending", req);
if (option_debug)
ast_log(LOG_DEBUG, "Got INVITE on call where we already have pending INVITE, deferring that - %s\n", p->callid);
/* Don't destroy dialog here */
@@ -13842,7 +13842,7 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
if (p->owner) {
if (option_debug > 2)
ast_log(LOG_DEBUG, "INVITE w Replaces on existing call? Refusing action. [%s]\n", p->callid);
transmit_response(p, "400 Bad request", req); /* The best way to not not accept the transfer */
transmit_response_reliable(p, "400 Bad request", req); /* The best way to not not accept the transfer */
/* Do not destroy existing call */
return -1;
}
@@ -13854,7 +13854,7 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
ast_uri_decode(replace_id);
if (!p->refer && !sip_refer_allocate(p)) {
transmit_response(p, "500 Server Internal Error", req);
transmit_response_reliable(p, "500 Server Internal Error", req);
append_history(p, "Xfer", "INVITE/Replace Failed. Out of memory.");
sip_scheddestroy(p, DEFAULT_TRANS_TIMEOUT);
p->invitestate = INV_COMPLETED;
@@ -13892,7 +13892,7 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
*/
if ((p->refer->refer_call = get_sip_pvt_byid_locked(replace_id, totag, fromtag)) == NULL) {
ast_log(LOG_NOTICE, "Supervised transfer attempted to replace non-existent call id (%s)!\n", replace_id);
transmit_response(p, "481 Call Leg Does Not Exist (Replaces)", req);
transmit_response_reliable(p, "481 Call Leg Does Not Exist (Replaces)", req);
error = 1;
}
@@ -13905,7 +13905,7 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
if (p->refer->refer_call == p) {
ast_log(LOG_NOTICE, "INVITE with replaces into it's own call id (%s == %s)!\n", replace_id, p->callid);
p->refer->refer_call = NULL;
transmit_response(p, "400 Bad request", req); /* The best way to not not accept the transfer */
transmit_response_reliable(p, "400 Bad request", req); /* The best way to not not accept the transfer */
error = 1;
}
@@ -13913,13 +13913,13 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
/* Oops, someting wrong anyway, no owner, no call */
ast_log(LOG_NOTICE, "Supervised transfer attempted to replace non-existing call id (%s)!\n", replace_id);
/* Check for better return code */
transmit_response(p, "481 Call Leg Does Not Exist (Replace)", req);
transmit_response_reliable(p, "481 Call Leg Does Not Exist (Replace)", req);
error = 1;
}
if (!error && p->refer->refer_call->owner->_state != AST_STATE_RINGING && p->refer->refer_call->owner->_state != AST_STATE_RING && p->refer->refer_call->owner->_state != AST_STATE_UP ) {
ast_log(LOG_NOTICE, "Supervised transfer attempted to replace non-ringing or active call id (%s)!\n", replace_id);
transmit_response(p, "603 Declined (Replaces)", req);
transmit_response_reliable(p, "603 Declined (Replaces)", req);
error = 1;
}
@@ -13961,7 +13961,7 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
/* Handle SDP here if we already have an owner */
if (find_sdp(req)) {
if (process_sdp(p, req)) {
transmit_response(p, "488 Not acceptable here", req);
transmit_response_reliable(p, "488 Not acceptable here", req);
if (!p->lastinvite)
sip_scheddestroy(p, DEFAULT_TRANS_TIMEOUT);
return -1;