Merged revisions 331868 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/10 ................ r331868 | dvossel | 2011-08-15 10:14:13 -0500 (Mon, 15 Aug 2011) | 12 lines Merged revisions 331867 via svnmerge from https://origsvn.digium.com/svn/asterisk/branches/1.8 ........ r331867 | dvossel | 2011-08-15 10:12:16 -0500 (Mon, 15 Aug 2011) | 6 lines Fixes locking inversion issues present in the handling of the sip REFER method. (closes issue ASTERISK-18082) Reported by: James Van Vleet ........ ................ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@331869 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
parent
6b7e997df2
commit
30b2f36c72
1 changed files with 149 additions and 92 deletions
|
@ -23274,15 +23274,26 @@ static int local_attended_transfer(struct sip_pvt *transferer, struct sip_dual *
|
||||||
*/
|
*/
|
||||||
static int handle_request_refer(struct sip_pvt *p, struct sip_request *req, int debug, int seqno, int *nounlock)
|
static int handle_request_refer(struct sip_pvt *p, struct sip_request *req, int debug, int seqno, int *nounlock)
|
||||||
{
|
{
|
||||||
struct sip_dual current; /* Chan1: Call between asterisk and transferer */
|
/*!
|
||||||
/* Chan2: Call between asterisk and transferee */
|
* Chan1: Call between asterisk and transferer
|
||||||
|
* Chan2: Call between asterisk and transferee
|
||||||
|
*/
|
||||||
|
struct sip_dual current = { 0, };
|
||||||
|
struct ast_channel *chans[2] = { 0, };
|
||||||
|
char *refer_to = NULL;
|
||||||
|
char *refer_to_domain = NULL;
|
||||||
|
char *refer_to_context = NULL;
|
||||||
|
char *referred_by = NULL;
|
||||||
|
char *callid = NULL;
|
||||||
|
int localtransfer = 0;
|
||||||
|
int attendedtransfer = 0;
|
||||||
int res = 0;
|
int res = 0;
|
||||||
struct ast_channel *chans[2];
|
|
||||||
current.req.data = NULL;
|
|
||||||
|
|
||||||
if (req->debug)
|
if (req->debug) {
|
||||||
ast_verbose("Call %s got a SIP call transfer from %s: (REFER)!\n", p->callid, ast_test_flag(&p->flags[0], SIP_OUTGOING) ? "callee" : "caller");
|
ast_verbose("Call %s got a SIP call transfer from %s: (REFER)!\n",
|
||||||
|
p->callid,
|
||||||
|
ast_test_flag(&p->flags[0], SIP_OUTGOING) ? "callee" : "caller");
|
||||||
|
}
|
||||||
|
|
||||||
if (!p->owner) {
|
if (!p->owner) {
|
||||||
/* This is a REFER outside of an existing SIP dialog */
|
/* This is a REFER outside of an existing SIP dialog */
|
||||||
|
@ -23294,31 +23305,34 @@ static int handle_request_refer(struct sip_pvt *p, struct sip_request *req, int
|
||||||
sip_alreadygone(p);
|
sip_alreadygone(p);
|
||||||
pvt_set_needdestroy(p, "outside of dialog");
|
pvt_set_needdestroy(p, "outside of dialog");
|
||||||
}
|
}
|
||||||
return 0;
|
res = 0;
|
||||||
|
goto handle_refer_cleanup;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
/* Check if transfer is allowed from this device */
|
/* Check if transfer is allowed from this device */
|
||||||
if (p->allowtransfer == TRANSFER_CLOSED ) {
|
if (p->allowtransfer == TRANSFER_CLOSED ) {
|
||||||
/* Transfer not allowed, decline */
|
/* Transfer not allowed, decline */
|
||||||
transmit_response(p, "603 Declined (policy)", req);
|
transmit_response(p, "603 Declined (policy)", req);
|
||||||
append_history(p, "Xfer", "Refer failed. Allowtransfer == closed.");
|
append_history(p, "Xfer", "Refer failed. Allowtransfer == closed.");
|
||||||
/* Do not destroy SIP session */
|
/* Do not destroy SIP session */
|
||||||
return 0;
|
res = 0;
|
||||||
|
goto handle_refer_cleanup;
|
||||||
}
|
}
|
||||||
|
|
||||||
if (!req->ignore && ast_test_flag(&p->flags[0], SIP_GOTREFER)) {
|
if (!req->ignore && ast_test_flag(&p->flags[0], SIP_GOTREFER)) {
|
||||||
/* Already have a pending REFER */
|
/* Already have a pending REFER */
|
||||||
transmit_response(p, "491 Request pending", req);
|
transmit_response(p, "491 Request pending", req);
|
||||||
append_history(p, "Xfer", "Refer failed. Request pending.");
|
append_history(p, "Xfer", "Refer failed. Request pending.");
|
||||||
return 0;
|
res = 0;
|
||||||
|
goto handle_refer_cleanup;
|
||||||
}
|
}
|
||||||
|
|
||||||
/* Allocate memory for call transfer data */
|
/* Allocate memory for call transfer data */
|
||||||
if (!p->refer && !sip_refer_allocate(p)) {
|
if (!p->refer && !sip_refer_allocate(p)) {
|
||||||
transmit_response(p, "500 Internal Server Error", req);
|
transmit_response(p, "500 Internal Server Error", req);
|
||||||
append_history(p, "Xfer", "Refer failed. Memory allocation error.");
|
append_history(p, "Xfer", "Refer failed. Memory allocation error.");
|
||||||
return -3;
|
res = -3;
|
||||||
|
goto handle_refer_cleanup;
|
||||||
}
|
}
|
||||||
|
|
||||||
res = get_refer_info(p, req); /* Extract headers */
|
res = get_refer_info(p, req); /* Extract headers */
|
||||||
|
@ -23330,14 +23344,16 @@ static int handle_request_refer(struct sip_pvt *p, struct sip_request *req, int
|
||||||
case -2: /* Syntax error */
|
case -2: /* Syntax error */
|
||||||
transmit_response(p, "400 Bad Request (Refer-to missing)", req);
|
transmit_response(p, "400 Bad Request (Refer-to missing)", req);
|
||||||
append_history(p, "Xfer", "Refer failed. Refer-to missing.");
|
append_history(p, "Xfer", "Refer failed. Refer-to missing.");
|
||||||
if (req->debug)
|
if (req->debug) {
|
||||||
ast_debug(1, "SIP transfer to black hole can't be handled (no refer-to: )\n");
|
ast_debug(1, "SIP transfer to black hole can't be handled (no refer-to: )\n");
|
||||||
|
}
|
||||||
break;
|
break;
|
||||||
case -3:
|
case -3:
|
||||||
transmit_response(p, "603 Declined (Non sip: uri)", req);
|
transmit_response(p, "603 Declined (Non sip: uri)", req);
|
||||||
append_history(p, "Xfer", "Refer failed. Non SIP uri");
|
append_history(p, "Xfer", "Refer failed. Non SIP uri");
|
||||||
if (req->debug)
|
if (req->debug) {
|
||||||
ast_debug(1, "SIP transfer to non-SIP uri denied\n");
|
ast_debug(1, "SIP transfer to non-SIP uri denied\n");
|
||||||
|
}
|
||||||
break;
|
break;
|
||||||
default:
|
default:
|
||||||
/* Refer-to extension not found, fake a failed transfer */
|
/* Refer-to extension not found, fake a failed transfer */
|
||||||
|
@ -23345,30 +23361,36 @@ static int handle_request_refer(struct sip_pvt *p, struct sip_request *req, int
|
||||||
append_history(p, "Xfer", "Refer failed. Bad extension.");
|
append_history(p, "Xfer", "Refer failed. Bad extension.");
|
||||||
transmit_notify_with_sipfrag(p, seqno, "404 Not found", TRUE);
|
transmit_notify_with_sipfrag(p, seqno, "404 Not found", TRUE);
|
||||||
ast_clear_flag(&p->flags[0], SIP_GOTREFER);
|
ast_clear_flag(&p->flags[0], SIP_GOTREFER);
|
||||||
if (req->debug)
|
if (req->debug) {
|
||||||
ast_debug(1, "SIP transfer to bad extension: %s\n", p->refer->refer_to);
|
ast_debug(1, "SIP transfer to bad extension: %s\n", p->refer->refer_to);
|
||||||
|
}
|
||||||
break;
|
break;
|
||||||
}
|
}
|
||||||
return 0;
|
res = 0;
|
||||||
|
goto handle_refer_cleanup;
|
||||||
}
|
}
|
||||||
if (ast_strlen_zero(p->context))
|
if (ast_strlen_zero(p->context)) {
|
||||||
ast_string_field_set(p, context, sip_cfg.default_context);
|
ast_string_field_set(p, context, sip_cfg.default_context);
|
||||||
|
}
|
||||||
|
|
||||||
/* If we do not support SIP domains, all transfers are local */
|
/* If we do not support SIP domains, all transfers are local */
|
||||||
if (sip_cfg.allow_external_domains && check_sip_domain(p->refer->refer_to_domain, NULL, 0)) {
|
if (sip_cfg.allow_external_domains && check_sip_domain(p->refer->refer_to_domain, NULL, 0)) {
|
||||||
p->refer->localtransfer = 1;
|
p->refer->localtransfer = 1;
|
||||||
if (sipdebug)
|
if (sipdebug) {
|
||||||
ast_debug(3, "This SIP transfer is local : %s\n", p->refer->refer_to_domain);
|
ast_debug(3, "This SIP transfer is local : %s\n", p->refer->refer_to_domain);
|
||||||
|
}
|
||||||
} else if (AST_LIST_EMPTY(&domain_list) || check_sip_domain(p->refer->refer_to_domain, NULL, 0)) {
|
} else if (AST_LIST_EMPTY(&domain_list) || check_sip_domain(p->refer->refer_to_domain, NULL, 0)) {
|
||||||
/* This PBX doesn't bother with SIP domains or domain is local, so this transfer is local */
|
/* This PBX doesn't bother with SIP domains or domain is local, so this transfer is local */
|
||||||
p->refer->localtransfer = 1;
|
p->refer->localtransfer = 1;
|
||||||
} else if (sipdebug)
|
} else if (sipdebug) {
|
||||||
ast_debug(3, "This SIP transfer is to a remote SIP extension (remote domain %s)\n", p->refer->refer_to_domain);
|
ast_debug(3, "This SIP transfer is to a remote SIP extension (remote domain %s)\n", p->refer->refer_to_domain);
|
||||||
|
}
|
||||||
|
|
||||||
/* Is this a repeat of a current request? Ignore it */
|
/* Is this a repeat of a current request? Ignore it */
|
||||||
/* Don't know what else to do right now. */
|
/* Don't know what else to do right now. */
|
||||||
if (req->ignore)
|
if (req->ignore) {
|
||||||
return res;
|
goto handle_refer_cleanup;
|
||||||
|
}
|
||||||
|
|
||||||
/* If this is a blind transfer, we have the following
|
/* If this is a blind transfer, we have the following
|
||||||
channels to work with:
|
channels to work with:
|
||||||
|
@ -23394,32 +23416,42 @@ static int handle_request_refer(struct sip_pvt *p, struct sip_request *req, int
|
||||||
header in the INVITE.
|
header in the INVITE.
|
||||||
*/
|
*/
|
||||||
|
|
||||||
|
|
||||||
/* Get the transferer's channel */
|
/* Get the transferer's channel */
|
||||||
chans[0] = current.chan1 = p->owner;
|
chans[0] = current.chan1 = p->owner;
|
||||||
|
|
||||||
/* Find the other part of the bridge (2) - transferee */
|
/* Find the other part of the bridge (2) - transferee */
|
||||||
chans[1] = current.chan2 = ast_bridged_channel(current.chan1);
|
chans[1] = current.chan2 = ast_bridged_channel(current.chan1);
|
||||||
|
|
||||||
if (sipdebug)
|
ast_channel_ref(current.chan1);
|
||||||
ast_debug(3, "SIP %s transfer: Transferer channel %s, transferee channel %s\n", p->refer->attendedtransfer ? "attended" : "blind", current.chan1->name, current.chan2 ? current.chan2->name : "<none>");
|
if (current.chan2) {
|
||||||
|
ast_channel_ref(current.chan2);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (sipdebug) {
|
||||||
|
ast_debug(3, "SIP %s transfer: Transferer channel %s, transferee channel %s\n",
|
||||||
|
p->refer->attendedtransfer ? "attended" : "blind",
|
||||||
|
current.chan1->name,
|
||||||
|
current.chan2 ? current.chan2->name : "<none>");
|
||||||
|
}
|
||||||
|
|
||||||
if (!current.chan2 && !p->refer->attendedtransfer) {
|
if (!current.chan2 && !p->refer->attendedtransfer) {
|
||||||
/* No bridged channel, propably IVR or echo or similar... */
|
/* No bridged channel, propably IVR or echo or similar... */
|
||||||
/* Guess we should masquerade or something here */
|
/* Guess we should masquerade or something here */
|
||||||
/* Until we figure it out, refuse transfer of such calls */
|
/* Until we figure it out, refuse transfer of such calls */
|
||||||
if (sipdebug)
|
if (sipdebug) {
|
||||||
ast_debug(3, "Refused SIP transfer on non-bridged channel.\n");
|
ast_debug(3, "Refused SIP transfer on non-bridged channel.\n");
|
||||||
|
}
|
||||||
p->refer->status = REFER_FAILED;
|
p->refer->status = REFER_FAILED;
|
||||||
append_history(p, "Xfer", "Refer failed. Non-bridged channel.");
|
append_history(p, "Xfer", "Refer failed. Non-bridged channel.");
|
||||||
transmit_response(p, "603 Declined", req);
|
transmit_response(p, "603 Declined", req);
|
||||||
return -1;
|
res = -1;
|
||||||
|
goto handle_refer_cleanup;
|
||||||
}
|
}
|
||||||
|
|
||||||
if (current.chan2) {
|
if (current.chan2) {
|
||||||
if (sipdebug)
|
if (sipdebug) {
|
||||||
ast_debug(4, "Got SIP transfer, applying to bridged peer '%s'\n", current.chan2->name);
|
ast_debug(4, "Got SIP transfer, applying to bridged peer '%s'\n", current.chan2->name);
|
||||||
|
}
|
||||||
ast_queue_control(current.chan1, AST_CONTROL_UNHOLD);
|
ast_queue_control(current.chan1, AST_CONTROL_UNHOLD);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -23430,32 +23462,42 @@ static int handle_request_refer(struct sip_pvt *p, struct sip_request *req, int
|
||||||
|
|
||||||
/* Attended transfer: Find all call legs and bridge transferee with target*/
|
/* Attended transfer: Find all call legs and bridge transferee with target*/
|
||||||
if (p->refer->attendedtransfer) {
|
if (p->refer->attendedtransfer) {
|
||||||
if ((res = local_attended_transfer(p, ¤t, req, seqno, nounlock)))
|
/* both p and p->owner _MUST_ be locked while calling local_attended_transfer */
|
||||||
return res; /* We're done with the transfer */
|
if ((res = local_attended_transfer(p, ¤t, req, seqno, nounlock))) {
|
||||||
|
goto handle_refer_cleanup; /* We're done with the transfer */
|
||||||
|
}
|
||||||
/* Fall through for remote transfers that we did not find locally */
|
/* Fall through for remote transfers that we did not find locally */
|
||||||
if (sipdebug)
|
if (sipdebug) {
|
||||||
ast_debug(4, "SIP attended transfer: Still not our call - generating INVITE with replaces\n");
|
ast_debug(4, "SIP attended transfer: Still not our call - generating INVITE with replaces\n");
|
||||||
|
}
|
||||||
/* Fallthrough if we can't find the call leg internally */
|
/* Fallthrough if we can't find the call leg internally */
|
||||||
}
|
}
|
||||||
|
|
||||||
/* Must release lock now, because it will not longer
|
/* Copy data we can not safely access after letting the pvt lock go. */
|
||||||
be accessible after the transfer! */
|
refer_to = ast_strdupa(p->refer->refer_to);
|
||||||
*nounlock = 1;
|
refer_to_domain = ast_strdupa(p->refer->refer_to_domain);
|
||||||
/*
|
refer_to_context = ast_strdupa(p->refer->refer_to_context);
|
||||||
* Increase ref count so that we can delay channel destruction until after
|
referred_by = ast_strdupa(p->refer->referred_by);
|
||||||
* we get a chance to fire off some events.
|
callid = ast_strdupa(p->callid);
|
||||||
*/
|
localtransfer = p->refer->localtransfer;
|
||||||
ast_channel_ref(current.chan1);
|
attendedtransfer = p->refer->attendedtransfer;
|
||||||
|
if (!*nounlock) {
|
||||||
|
ast_channel_unlock(p->owner);
|
||||||
|
*nounlock = 1;
|
||||||
|
}
|
||||||
sip_pvt_unlock(p);
|
sip_pvt_unlock(p);
|
||||||
ast_channel_unlock(current.chan1);
|
|
||||||
|
|
||||||
/* Parking a call */
|
/* Parking a call. DO NOT hold any locks while calling ast_parking_ext_valid() */
|
||||||
if (p->refer->localtransfer && ast_parking_ext_valid(p->refer->refer_to, p->owner, p->owner->context)) {
|
if (localtransfer && ast_parking_ext_valid(refer_to, current.chan1, current.chan1->context)) {
|
||||||
sip_pvt_lock(p);
|
|
||||||
copy_request(¤t.req, req);
|
copy_request(¤t.req, req);
|
||||||
|
|
||||||
|
sip_pvt_lock(p);
|
||||||
ast_clear_flag(&p->flags[0], SIP_GOTREFER);
|
ast_clear_flag(&p->flags[0], SIP_GOTREFER);
|
||||||
p->refer->status = REFER_200OK;
|
p->refer->status = REFER_200OK;
|
||||||
append_history(p, "Xfer", "REFER to call parking.");
|
append_history(p, "Xfer", "REFER to call parking.");
|
||||||
|
sip_pvt_unlock(p);
|
||||||
|
|
||||||
ast_manager_event_multichan(EVENT_FLAG_CALL, "Transfer", 2, chans,
|
ast_manager_event_multichan(EVENT_FLAG_CALL, "Transfer", 2, chans,
|
||||||
"TransferMethod: SIP\r\n"
|
"TransferMethod: SIP\r\n"
|
||||||
"TransferType: Blind\r\n"
|
"TransferType: Blind\r\n"
|
||||||
|
@ -23468,54 +23510,68 @@ static int handle_request_refer(struct sip_pvt *p, struct sip_request *req, int
|
||||||
"Transfer2Parking: Yes\r\n",
|
"Transfer2Parking: Yes\r\n",
|
||||||
current.chan1->name,
|
current.chan1->name,
|
||||||
current.chan1->uniqueid,
|
current.chan1->uniqueid,
|
||||||
p->callid,
|
callid,
|
||||||
current.chan2->name,
|
current.chan2->name,
|
||||||
current.chan2->uniqueid,
|
current.chan2->uniqueid,
|
||||||
p->refer->refer_to);
|
refer_to);
|
||||||
if (sipdebug)
|
|
||||||
|
if (sipdebug) {
|
||||||
ast_debug(4, "SIP transfer to parking: trying to park %s. Parked by %s\n", current.chan2->name, current.chan1->name);
|
ast_debug(4, "SIP transfer to parking: trying to park %s. Parked by %s\n", current.chan2->name, current.chan1->name);
|
||||||
if (sip_park(current.chan2, current.chan1, req, seqno, p->refer->refer_to)) {
|
|
||||||
transmit_notify_with_sipfrag(p, seqno, "500 Internal Server Error", TRUE);
|
|
||||||
}
|
}
|
||||||
ast_channel_unref(current.chan1);
|
|
||||||
return res;
|
/* DO NOT hold any locks while calling sip_park */
|
||||||
|
if (sip_park(current.chan2, current.chan1, req, seqno, refer_to)) {
|
||||||
|
sip_pvt_lock(p);
|
||||||
|
transmit_notify_with_sipfrag(p, seqno, "500 Internal Server Error", TRUE);
|
||||||
|
} else {
|
||||||
|
sip_pvt_lock(p);
|
||||||
|
}
|
||||||
|
goto handle_refer_cleanup;
|
||||||
}
|
}
|
||||||
|
|
||||||
/* Blind transfers and remote attended xfers */
|
/* Blind transfers and remote attended xfers.
|
||||||
|
* Locks should not be held while calling pbx_builtin_setvar_helper. This function
|
||||||
|
* locks the channel being passed into it.*/
|
||||||
if (current.chan1 && current.chan2) {
|
if (current.chan1 && current.chan2) {
|
||||||
ast_debug(3, "chan1->name: %s\n", current.chan1->name);
|
ast_debug(3, "chan1->name: %s\n", current.chan1->name);
|
||||||
pbx_builtin_setvar_helper(current.chan1, "BLINDTRANSFER", current.chan2->name);
|
pbx_builtin_setvar_helper(current.chan1, "BLINDTRANSFER", current.chan2->name);
|
||||||
}
|
}
|
||||||
|
|
||||||
sip_pvt_lock(p);
|
|
||||||
|
|
||||||
if (current.chan2) {
|
if (current.chan2) {
|
||||||
pbx_builtin_setvar_helper(current.chan2, "BLINDTRANSFER", current.chan1->name);
|
pbx_builtin_setvar_helper(current.chan2, "BLINDTRANSFER", current.chan1->name);
|
||||||
pbx_builtin_setvar_helper(current.chan2, "SIPDOMAIN", p->refer->refer_to_domain);
|
pbx_builtin_setvar_helper(current.chan2, "SIPDOMAIN", refer_to_domain);
|
||||||
pbx_builtin_setvar_helper(current.chan2, "SIPTRANSFER", "yes");
|
pbx_builtin_setvar_helper(current.chan2, "SIPTRANSFER", "yes");
|
||||||
/* One for the new channel */
|
/* One for the new channel */
|
||||||
pbx_builtin_setvar_helper(current.chan2, "_SIPTRANSFER", "yes");
|
pbx_builtin_setvar_helper(current.chan2, "_SIPTRANSFER", "yes");
|
||||||
/* Attended transfer to remote host, prepare headers for the INVITE */
|
/* Attended transfer to remote host, prepare headers for the INVITE */
|
||||||
if (p->refer->referred_by)
|
if (!ast_strlen_zero(referred_by)) {
|
||||||
pbx_builtin_setvar_helper(current.chan2, "_SIPTRANSFER_REFERER", p->refer->referred_by);
|
pbx_builtin_setvar_helper(current.chan2, "_SIPTRANSFER_REFERER", referred_by);
|
||||||
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
sip_pvt_lock(p);
|
||||||
/* Generate a Replaces string to be used in the INVITE during attended transfer */
|
/* Generate a Replaces string to be used in the INVITE during attended transfer */
|
||||||
if (!ast_strlen_zero(p->refer->replaces_callid)) {
|
if (!ast_strlen_zero(p->refer->replaces_callid)) {
|
||||||
char tempheader[SIPBUFSIZE];
|
char tempheader[SIPBUFSIZE];
|
||||||
snprintf(tempheader, sizeof(tempheader), "%s%s%s%s%s", p->refer->replaces_callid,
|
snprintf(tempheader, sizeof(tempheader), "%s%s%s%s%s", p->refer->replaces_callid,
|
||||||
p->refer->replaces_callid_totag ? ";to-tag=" : "",
|
p->refer->replaces_callid_totag ? ";to-tag=" : "",
|
||||||
p->refer->replaces_callid_totag,
|
p->refer->replaces_callid_totag,
|
||||||
p->refer->replaces_callid_fromtag ? ";from-tag=" : "",
|
p->refer->replaces_callid_fromtag ? ";from-tag=" : "",
|
||||||
p->refer->replaces_callid_fromtag);
|
p->refer->replaces_callid_fromtag);
|
||||||
if (current.chan2)
|
|
||||||
|
if (current.chan2) {
|
||||||
|
sip_pvt_unlock(p);
|
||||||
pbx_builtin_setvar_helper(current.chan2, "_SIPTRANSFER_REPLACES", tempheader);
|
pbx_builtin_setvar_helper(current.chan2, "_SIPTRANSFER_REPLACES", tempheader);
|
||||||
|
sip_pvt_lock(p);
|
||||||
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
/* Connect the call */
|
/* Connect the call */
|
||||||
|
|
||||||
/* FAKE ringing if not attended transfer */
|
/* FAKE ringing if not attended transfer */
|
||||||
if (!p->refer->attendedtransfer)
|
if (!p->refer->attendedtransfer) {
|
||||||
transmit_notify_with_sipfrag(p, seqno, "183 Ringing", FALSE);
|
transmit_notify_with_sipfrag(p, seqno, "183 Ringing", FALSE);
|
||||||
|
}
|
||||||
|
|
||||||
/* For blind transfer, this will lead to a new call */
|
/* For blind transfer, this will lead to a new call */
|
||||||
/* For attended transfer to remote host, this will lead to
|
/* For attended transfer to remote host, this will lead to
|
||||||
|
@ -23533,26 +23589,20 @@ static int handle_request_refer(struct sip_pvt *p, struct sip_request *req, int
|
||||||
transmit_notify_with_sipfrag(p, seqno, "503 Service Unavailable (can't handle one-legged xfers)", TRUE);
|
transmit_notify_with_sipfrag(p, seqno, "503 Service Unavailable (can't handle one-legged xfers)", TRUE);
|
||||||
ast_clear_flag(&p->flags[0], SIP_GOTREFER);
|
ast_clear_flag(&p->flags[0], SIP_GOTREFER);
|
||||||
append_history(p, "Xfer", "Refer failed (only bridged calls).");
|
append_history(p, "Xfer", "Refer failed (only bridged calls).");
|
||||||
ast_channel_unref(current.chan1);
|
res = -1;
|
||||||
return -1;
|
goto handle_refer_cleanup;
|
||||||
}
|
}
|
||||||
ast_set_flag(&p->flags[0], SIP_DEFER_BYE_ON_TRANSFER); /* Delay hangup */
|
ast_set_flag(&p->flags[0], SIP_DEFER_BYE_ON_TRANSFER); /* Delay hangup */
|
||||||
|
|
||||||
{
|
/* Do not hold the pvt lock during the indicate and async_goto. Those functions
|
||||||
char *refer_to_context = ast_strdupa(p->refer->refer_to_context);
|
* lock channels which will invalidate locking order if the pvt lock is held.*/
|
||||||
char *refer_to = ast_strdupa(p->refer->refer_to);
|
/* For blind transfers, move the call to the new extensions. For attended transfers on multiple
|
||||||
|
* servers - generate an INVITE with Replaces. Either way, let the dial plan decided
|
||||||
/* Do not hold the pvt lock during the indicate and async_goto. Those functions
|
* indicate before masquerade so the indication actually makes it to the real channel
|
||||||
* lock channels which will invalidate locking order if the pvt lock is held.*/
|
* when using local channels with MOH passthru */
|
||||||
ao2_unlock(p);
|
sip_pvt_unlock(p);
|
||||||
/* For blind transfers, move the call to the new extensions. For attended transfers on multiple
|
ast_indicate(current.chan2, AST_CONTROL_UNHOLD);
|
||||||
* servers - generate an INVITE with Replaces. Either way, let the dial plan decided */
|
res = ast_async_goto(current.chan2, refer_to_context, refer_to, 1);
|
||||||
/* indicate before masquerade so the indication actually makes it to the real channel
|
|
||||||
*when using local channels with MOH passthru */
|
|
||||||
ast_indicate(current.chan2, AST_CONTROL_UNHOLD);
|
|
||||||
res = ast_async_goto(current.chan2, refer_to_context, refer_to, 1);
|
|
||||||
ao2_lock(p);
|
|
||||||
}
|
|
||||||
|
|
||||||
if (!res) {
|
if (!res) {
|
||||||
ast_manager_event_multichan(EVENT_FLAG_CALL, "Transfer", 2, chans,
|
ast_manager_event_multichan(EVENT_FLAG_CALL, "Transfer", 2, chans,
|
||||||
|
@ -23567,34 +23617,34 @@ static int handle_request_refer(struct sip_pvt *p, struct sip_request *req, int
|
||||||
"TransferContext: %s\r\n",
|
"TransferContext: %s\r\n",
|
||||||
current.chan1->name,
|
current.chan1->name,
|
||||||
current.chan1->uniqueid,
|
current.chan1->uniqueid,
|
||||||
p->callid,
|
callid,
|
||||||
current.chan2->name,
|
current.chan2->name,
|
||||||
current.chan2->uniqueid,
|
current.chan2->uniqueid,
|
||||||
p->refer->refer_to, p->refer->refer_to_context);
|
refer_to,
|
||||||
|
refer_to_context);
|
||||||
/* Success - we have a new channel */
|
/* Success - we have a new channel */
|
||||||
ast_debug(3, "%s transfer succeeded. Telling transferer.\n", p->refer->attendedtransfer? "Attended" : "Blind");
|
ast_debug(3, "%s transfer succeeded. Telling transferer.\n", attendedtransfer? "Attended" : "Blind");
|
||||||
|
|
||||||
while (ast_channel_trylock(current.chan1)) {
|
|
||||||
sip_pvt_unlock(p);
|
|
||||||
sched_yield();
|
|
||||||
sip_pvt_lock(p);
|
|
||||||
}
|
|
||||||
|
|
||||||
/* XXX - what to we put in CEL 'extra' for attended transfers to external systems? NULL for now */
|
/* XXX - what to we put in CEL 'extra' for attended transfers to external systems? NULL for now */
|
||||||
|
ast_channel_lock(current.chan1);
|
||||||
ast_cel_report_event(current.chan1, p->refer->attendedtransfer? AST_CEL_ATTENDEDTRANSFER : AST_CEL_BLINDTRANSFER, NULL, p->refer->attendedtransfer ? NULL : p->refer->refer_to, current.chan2);
|
ast_cel_report_event(current.chan1, p->refer->attendedtransfer? AST_CEL_ATTENDEDTRANSFER : AST_CEL_BLINDTRANSFER, NULL, p->refer->attendedtransfer ? NULL : p->refer->refer_to, current.chan2);
|
||||||
ast_channel_unlock(current.chan1);
|
ast_channel_unlock(current.chan1);
|
||||||
|
|
||||||
|
sip_pvt_lock(p);
|
||||||
transmit_notify_with_sipfrag(p, seqno, "200 Ok", TRUE);
|
transmit_notify_with_sipfrag(p, seqno, "200 Ok", TRUE);
|
||||||
if (p->refer->localtransfer)
|
if (p->refer->localtransfer) {
|
||||||
p->refer->status = REFER_200OK;
|
p->refer->status = REFER_200OK;
|
||||||
if (p->owner)
|
}
|
||||||
|
if (p->owner) {
|
||||||
p->owner->hangupcause = AST_CAUSE_NORMAL_CLEARING;
|
p->owner->hangupcause = AST_CAUSE_NORMAL_CLEARING;
|
||||||
|
}
|
||||||
append_history(p, "Xfer", "Refer succeeded.");
|
append_history(p, "Xfer", "Refer succeeded.");
|
||||||
ast_clear_flag(&p->flags[0], SIP_GOTREFER);
|
ast_clear_flag(&p->flags[0], SIP_GOTREFER);
|
||||||
/* Do not hangup call, the other side do that when we say 200 OK */
|
/* Do not hangup call, the other side do that when we say 200 OK */
|
||||||
/* We could possibly implement a timer here, auto congestion */
|
/* We could possibly implement a timer here, auto congestion */
|
||||||
res = 0;
|
res = 0;
|
||||||
} else {
|
} else {
|
||||||
|
sip_pvt_lock(p);
|
||||||
ast_clear_flag(&p->flags[0], SIP_DEFER_BYE_ON_TRANSFER); /* Don't delay hangup */
|
ast_clear_flag(&p->flags[0], SIP_DEFER_BYE_ON_TRANSFER); /* Don't delay hangup */
|
||||||
ast_debug(3, "%s transfer failed. Resuming original call.\n", p->refer->attendedtransfer? "Attended" : "Blind");
|
ast_debug(3, "%s transfer failed. Resuming original call.\n", p->refer->attendedtransfer? "Attended" : "Blind");
|
||||||
append_history(p, "Xfer", "Refer failed.");
|
append_history(p, "Xfer", "Refer failed.");
|
||||||
|
@ -23605,8 +23655,15 @@ static int handle_request_refer(struct sip_pvt *p, struct sip_request *req, int
|
||||||
res = -1;
|
res = -1;
|
||||||
}
|
}
|
||||||
|
|
||||||
ast_channel_unref(current.chan1);
|
handle_refer_cleanup:
|
||||||
|
if (current.chan1) {
|
||||||
|
ast_channel_unref(current.chan1);
|
||||||
|
}
|
||||||
|
if (current.chan2) {
|
||||||
|
ast_channel_unref(current.chan2);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Make sure we exit with the pvt locked */
|
||||||
return res;
|
return res;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
Loading…
Reference in a new issue