[asterisk-commits] mmichelson: branch mmichelson/transfer r388309 - in /team/mmichelson/transfer...
SVN commits to the Asterisk project
asterisk-commits at lists.digium.com
Fri May 10 09:40:19 CDT 2013
Author: mmichelson
Date: Fri May 10 09:40:16 2013
New Revision: 388309
URL: http://svnview.digium.com/svn/asterisk?view=rev&rev=388309
Log:
This merges blind transfer support of chan_sip into the main transfer branch.
Review https://reviewboard.asterisk.org/r/2495
(closes issue ASTERISK-21519)
reported by Matt Jordan
Modified:
team/mmichelson/transfer/ (props changed)
team/mmichelson/transfer/channels/chan_sip.c
Propchange: team/mmichelson/transfer/
------------------------------------------------------------------------------
--- automerge-propname (original)
+++ automerge-propname Fri May 10 09:40:16 2013
@@ -1,1 +1,1 @@
-transfer-integrated
+sip_transfer-integrated
Propchange: team/mmichelson/transfer/
------------------------------------------------------------------------------
sip_transfer-integrated = /team/mmichelson/transfer:1-388307
Modified: team/mmichelson/transfer/channels/chan_sip.c
URL: http://svnview.digium.com/svn/asterisk/team/mmichelson/transfer/channels/chan_sip.c?view=diff&rev=388309&r1=388308&r2=388309
==============================================================================
--- team/mmichelson/transfer/channels/chan_sip.c (original)
+++ team/mmichelson/transfer/channels/chan_sip.c Fri May 10 09:40:16 2013
@@ -295,6 +295,7 @@
#include "sip/include/security_events.h"
#include "asterisk/sip_api.h"
#include "asterisk/app.h"
+#include "asterisk/bridging.h"
#include "asterisk/stasis_endpoints.h"
/*** DOCUMENTATION
@@ -1202,8 +1203,6 @@
struct sip_request *req, const char *uri);
static struct sip_pvt *get_sip_pvt_byid_locked(const char *callid, const char *totag, const char *fromtag);
static void check_pendings(struct sip_pvt *p);
-static void *sip_park_thread(void *stuff);
-static int sip_park(struct ast_channel *chan1, struct ast_channel *chan2, struct sip_request *req, uint32_t seqno, const char *park_exten, const char *park_context);
static void *sip_pickup_thread(void *stuff);
static int sip_pickup(struct ast_channel *chan);
@@ -24430,160 +24429,6 @@
}
}
-
-/*! \brief Park SIP call support function
- Starts in a new thread, then parks the call
- XXX Should we add a wait period after streaming audio and before hangup?? Sometimes the
- audio can't be heard before hangup
-*/
-static void *sip_park_thread(void *stuff)
-{
- struct ast_channel *transferee, *transferer; /* Chan1: The transferee, Chan2: The transferer */
- struct sip_dual *d;
- int ext;
- int res;
-
- d = stuff;
- transferee = d->chan1;
- transferer = d->chan2;
-
- ast_debug(4, "SIP Park: Transferer channel %s, Transferee %s\n", ast_channel_name(transferer), ast_channel_name(transferee));
-
- res = ast_park_call_exten(transferee, transferer, d->park_exten, d->park_context, 0, &ext);
-
- sip_pvt_lock(ast_channel_tech_pvt(transferer));
-#ifdef WHEN_WE_KNOW_THAT_THE_CLIENT_SUPPORTS_MESSAGE
- if (res) {
- destroy_msg_headers(ast_channel_tech_pvt(transferer));
- ast_string_field_set(ast_channel_tech_pvt(transferer), msg_body, "Unable to park call.");
- transmit_message(ast_channel_tech_pvt(transferer), 0, 0);
- } else {
- /* Then tell the transferer what happened */
- destroy_msg_headers(ast_channel_tech_pvt(transferer));
- sprintf(buf, "Call parked on extension '%d'.", ext);
- ast_string_field_set(ast_channel_tech_pvt(transferer), msg_body, buf);
- transmit_message(ast_channel_tech_pvt(transferer), 0, 0);
- }
-#endif
-
- /* Any way back to the current call??? */
- /* Transmit response to the REFER request */
- if (!res) {
- /* Transfer succeeded */
- append_history(ast_channel_tech_pvt(transferer), "SIPpark", "Parked call on %d", ext);
- transmit_notify_with_sipfrag(ast_channel_tech_pvt(transferer), d->seqno, "200 OK", TRUE);
- sip_pvt_unlock(ast_channel_tech_pvt(transferer));
- ast_channel_hangupcause_set(transferer, AST_CAUSE_NORMAL_CLEARING);
- ast_hangup(transferer); /* This will cause a BYE */
- ast_debug(1, "SIP Call parked on extension '%d'\n", ext);
- } else {
- transmit_notify_with_sipfrag(ast_channel_tech_pvt(transferer), d->seqno, "503 Service Unavailable", TRUE);
- append_history(ast_channel_tech_pvt(transferer), "SIPpark", "Parking failed\n");
- sip_pvt_unlock(ast_channel_tech_pvt(transferer));
- ast_debug(1, "SIP Call parked failed \n");
- /* Do not hangup call */
- }
- deinit_req(&d->req);
- ast_free(d->park_exten);
- ast_free(d->park_context);
- ast_free(d);
- return NULL;
-}
-
-/*! DO NOT hold any locks while calling sip_park */
-static int sip_park(struct ast_channel *chan1, struct ast_channel *chan2, struct sip_request *req, uint32_t seqno, const char *park_exten, const char *park_context)
-{
- struct sip_dual *d;
- struct ast_channel *transferee, *transferer;
- pthread_t th;
-
- transferee = ast_channel_alloc(0, AST_STATE_DOWN, 0, 0, ast_channel_accountcode(chan1), ast_channel_exten(chan1), ast_channel_context(chan1), ast_channel_linkedid(chan1), ast_channel_amaflags(chan1), "Parking/%s", ast_channel_name(chan1));
- transferer = ast_channel_alloc(0, AST_STATE_DOWN, 0, 0, ast_channel_accountcode(chan2), ast_channel_exten(chan2), ast_channel_context(chan2), ast_channel_linkedid(chan2), ast_channel_amaflags(chan2), "SIPPeer/%s", ast_channel_name(chan2));
- d = ast_calloc(1, sizeof(*d));
- if (!transferee || !transferer || !d) {
- if (transferee) {
- ast_hangup(transferee);
- }
- if (transferer) {
- ast_hangup(transferer);
- }
- ast_free(d);
- return -1;
- }
- d->park_exten = ast_strdup(park_exten);
- d->park_context = ast_strdup(park_context);
- if (!d->park_exten || !d->park_context) {
- ast_hangup(transferee);
- ast_hangup(transferer);
- ast_free(d->park_exten);
- ast_free(d->park_context);
- ast_free(d);
- return -1;
- }
-
- /* Make formats okay */
- ast_format_copy(ast_channel_readformat(transferee), ast_channel_readformat(chan1));
- ast_format_copy(ast_channel_writeformat(transferee), ast_channel_writeformat(chan1));
-
- /* Prepare for taking over the channel */
- if (ast_channel_masquerade(transferee, chan1)) {
- ast_hangup(transferee);
- ast_hangup(transferer);
- ast_free(d->park_exten);
- ast_free(d->park_context);
- ast_free(d);
- return -1;
- }
-
- /* Setup the extensions and such */
- ast_channel_context_set(transferee, ast_channel_context(chan1));
- ast_channel_exten_set(transferee, ast_channel_exten(chan1));
- ast_channel_priority_set(transferee, ast_channel_priority(chan1));
-
- ast_do_masquerade(transferee);
-
- /* We make a clone of the peer channel too, so we can play
- back the announcement */
-
- /* Make formats okay */
- ast_format_copy(ast_channel_readformat(transferer), ast_channel_readformat(chan2));
- ast_format_copy(ast_channel_writeformat(transferer), ast_channel_writeformat(chan2));
- ast_channel_parkinglot_set(transferer, ast_channel_parkinglot(chan2));
-
- /* Prepare for taking over the channel */
- if (ast_channel_masquerade(transferer, chan2)) {
- ast_hangup(transferer);
- ast_free(d->park_exten);
- ast_free(d->park_context);
- ast_free(d);
- return -1;
- }
-
- /* Setup the extensions and such */
- ast_channel_context_set(transferer, ast_channel_context(chan2));
- ast_channel_exten_set(transferer, ast_channel_exten(chan2));
- ast_channel_priority_set(transferer, ast_channel_priority(chan2));
-
- ast_do_masquerade(transferer);
-
- /* Save original request for followup */
- copy_request(&d->req, req);
- d->chan1 = transferee; /* Transferee */
- d->chan2 = transferer; /* Transferer */
- d->seqno = seqno;
- if (ast_pthread_create_detached_background(&th, NULL, sip_park_thread, d) < 0) {
- /* Could not start thread */
- deinit_req(&d->req);
- ast_free(d->park_exten);
- ast_free(d->park_context);
- ast_free(d); /* We don't need it anymore. If thread is created, d will be free'd
- by sip_park_thread() */
- return -1;
- }
- return 0;
-}
-
-
/*! \brief SIP pickup support function
* Starts in a new thread, then pickup the call
*/
@@ -26173,6 +26018,10 @@
*
* If this function is successful, only the transferer pvt lock will remain on return. Setting nounlock indicates
* to handle_request_do() that the pvt's owner it locked does not require an unlock.
+ */
+
+/* XXX XXX XXX XXX XXX XXX
+ * This function is COMPLETELY broken at the moment. It *will* crash if called
*/
static int local_attended_transfer(struct sip_pvt *transferer, struct sip_dual *current, struct sip_request *req, uint32_t seqno, int *nounlock)
{
@@ -26374,6 +26223,44 @@
return 1;
}
+/*!
+ * Data to set on a channel that runs dialplan
+ * at the completion of a blind transfer
+ */
+struct blind_transfer_cb_data {
+ /*! Contents of the REFER's Referred-by header */
+ const char *referred_by;
+ /*! Domain of the URI in the REFER's Refer-To header */
+ const char *domain;
+ /*! Contents of what to place in a Replaces header of an INVITE */
+ const char *replaces;
+ /*! Redirecting information to set on the channel */
+ struct ast_party_redirecting redirecting;
+ /*! Parts of the redirecting structure that are to be updated */
+ struct ast_set_party_redirecting update_redirecting;
+};
+
+/*!
+ * \internal
+ * \brief Callback called on new outbound channel during blind transfer
+ *
+ * We use this opportunity to populate the channel with data from the REFER
+ * so that, if necessary, we can include proper information on any new INVITE
+ * we may send out.
+ *
+ * \param chan The new outbound channel
+ * \user_data A blind_transfer_cb_data struct
+ */
+static void blind_transfer_cb(struct ast_channel *chan, void *user_data)
+{
+ struct blind_transfer_cb_data *cb_data = user_data;
+
+ pbx_builtin_setvar_helper(chan, "SIPTRANSFER", "yes");
+ pbx_builtin_setvar_helper(chan, "SIPTRANSFER_REFERER", cb_data->referred_by);
+ pbx_builtin_setvar_helper(chan, "SIPTRANSFER_REPLACES", cb_data->replaces);
+ pbx_builtin_setvar_helper(chan, "SIPDOMAIN", cb_data->domain);
+ ast_channel_update_redirecting(chan, &cb_data->redirecting, &cb_data->update_redirecting);
+}
/*! \brief Handle incoming REFER request */
/*! \page SIP_REFER SIP transfer Support (REFER)
@@ -26440,22 +26327,13 @@
*/
static int handle_request_refer(struct sip_pvt *p, struct sip_request *req, uint32_t seqno, int *nounlock)
{
- /*!
- * 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;
- struct ast_party_redirecting redirecting;
- struct ast_set_party_redirecting update_redirecting;
+ struct blind_transfer_cb_data cb_data;
+ enum ast_transfer_result transfer_res;
+ RAII_VAR(struct ast_channel *, transferer, NULL, ao2_cleanup);
+ RAII_VAR(struct ast_str *, replaces_str, NULL, ast_free_ptr);
if (req->debug) {
ast_verbose("Call %s got a SIP call transfer from %s: (REFER)!\n",
@@ -26473,8 +26351,7 @@
sip_alreadygone(p);
pvt_set_needdestroy(p, "outside of dialog");
}
- res = 0;
- goto handle_refer_cleanup;
+ return 0;
}
/* Check if transfer is allowed from this device */
@@ -26483,24 +26360,21 @@
transmit_response(p, "603 Declined (policy)", req);
append_history(p, "Xfer", "Refer failed. Allowtransfer == closed.");
/* Do not destroy SIP session */
- res = 0;
- goto handle_refer_cleanup;
+ return 0;
}
if (!req->ignore && ast_test_flag(&p->flags[0], SIP_GOTREFER)) {
/* Already have a pending REFER */
transmit_response(p, "491 Request pending", req);
append_history(p, "Xfer", "Refer failed. Request pending.");
- res = 0;
- goto handle_refer_cleanup;
+ return 0;
}
/* Allocate memory for call transfer data */
if (!p->refer && !sip_refer_alloc(p)) {
transmit_response(p, "500 Internal Server Error", req);
append_history(p, "Xfer", "Refer failed. Memory allocation error.");
- res = -3;
- goto handle_refer_cleanup;
+ return -3;
}
res = get_refer_info(p, req); /* Extract headers */
@@ -26534,9 +26408,9 @@
}
break;
}
- res = 0;
- goto handle_refer_cleanup;
- }
+ return 0;
+ }
+
if (ast_strlen_zero(p->context)) {
ast_string_field_set(p, context, sip_cfg.default_context);
}
@@ -26557,70 +26431,16 @@
/* Is this a repeat of a current request? Ignore it */
/* Don't know what else to do right now. */
if (req->ignore) {
- goto handle_refer_cleanup;
- }
-
- /* If this is a blind transfer, we have the following
- channels to work with:
- - chan1, chan2: The current call between transferer and transferee (2 channels)
- - target_channel: A new call from the transferee to the target (1 channel)
- We need to stay tuned to what happens in order to be able
- to bring back the call to the transferer */
-
- /* If this is a attended transfer, we should have all call legs within reach:
- - chan1, chan2: The call between the transferer and transferee (2 channels)
- - target_channel, targetcall_pvt: The call between the transferer and the target (2 channels)
- We want to bridge chan2 with targetcall_pvt!
-
- The replaces call id in the refer message points
- to the call leg between Asterisk and the transferer.
- So we need to connect the target and the transferee channel
- and hangup the two other channels silently
-
- If the target is non-local, the call ID could be on a remote
- machine and we need to send an INVITE with replaces to the
- target. We basically handle this as a blind transfer
- and let the sip_call function catch that we need replaces
- header in the INVITE.
- */
+ return 0;
+ }
/* Get the transferer's channel */
- chans[0] = current.chan1 = p->owner;
-
- /* Find the other part of the bridge (2) - transferee */
- chans[1] = current.chan2 = ast_bridged_channel(current.chan1);
-
- ast_channel_ref(current.chan1);
- if (current.chan2) {
- ast_channel_ref(current.chan2);
- }
+ transferer = ast_channel_ref(p->owner);
if (sipdebug) {
- ast_debug(3, "SIP %s transfer: Transferer channel %s, transferee channel %s\n",
+ ast_debug(3, "SIP %s transfer: Transferer channel %s\n",
p->refer->attendedtransfer ? "attended" : "blind",
- ast_channel_name(current.chan1),
- current.chan2 ? ast_channel_name(current.chan2) : "<none>");
- }
-
- if (!current.chan2 && !p->refer->attendedtransfer) {
- /* No bridged channel, propably IVR or echo or similar... */
- /* Guess we should masquerade or something here */
- /* Until we figure it out, refuse transfer of such calls */
- if (sipdebug) {
- ast_debug(3, "Refused SIP transfer on non-bridged channel.\n");
- }
- p->refer->status = REFER_FAILED;
- append_history(p, "Xfer", "Refer failed. Non-bridged channel.");
- transmit_response(p, "603 Declined", req);
- res = -1;
- goto handle_refer_cleanup;
- }
-
- if (current.chan2) {
- if (sipdebug) {
- ast_debug(4, "Got SIP transfer, applying to bridged peer '%s'\n", ast_channel_name(current.chan2));
- }
- ast_queue_control(current.chan1, AST_CONTROL_UNHOLD);
+ ast_channel_name(transferer));
}
ast_set_flag(&p->flags[0], SIP_GOTREFER);
@@ -26631,8 +26451,9 @@
/* Attended transfer: Find all call legs and bridge transferee with target*/
if (p->refer->attendedtransfer) {
/* both p and p->owner _MUST_ be locked while calling local_attended_transfer */
- if ((res = local_attended_transfer(p, ¤t, req, seqno, nounlock))) {
- goto handle_refer_cleanup; /* We're done with the transfer */
+ if ((res = local_attended_transfer(p, NULL, req, seqno, nounlock))) {
+ ast_clear_flag(&p->flags[0], SIP_GOTREFER);
+ return res;
}
/* Fall through for remote transfers that we did not find locally */
if (sipdebug) {
@@ -26643,210 +26464,74 @@
/* Copy data we can not safely access after letting the pvt lock go. */
refer_to = ast_strdupa(p->refer->refer_to);
- refer_to_domain = ast_strdupa(p->refer->refer_to_domain);
refer_to_context = ast_strdupa(p->refer->refer_to_context);
- referred_by = ast_strdupa(p->refer->referred_by);
- callid = ast_strdupa(p->callid);
- localtransfer = p->refer->localtransfer;
- attendedtransfer = p->refer->attendedtransfer;
+
+ ast_party_redirecting_init(&cb_data.redirecting);
+ memset(&cb_data.update_redirecting, 0, sizeof(cb_data.update_redirecting));
+ change_redirecting_information(p, req, &cb_data.redirecting, &cb_data.update_redirecting, 0);
+
+ cb_data.domain = ast_strdupa(p->refer->refer_to_domain);
+ cb_data.referred_by = ast_strdupa(p->refer->referred_by);
+
+ if (!ast_strlen_zero(p->refer->replaces_callid)) {
+ replaces_str = ast_str_create(128);
+ if (!replaces_str) {
+ ast_log(LOG_NOTICE, "Unable to create Replaces string for remote attended transfer. Transfer failed\n");
+ ast_clear_flag(&p->flags[0], SIP_GOTREFER);
+ ast_party_redirecting_free(&cb_data.redirecting);
+ return -1;
+ }
+ ast_str_append(&replaces_str, 0, "%s%s%s%s%s", p->refer->replaces_callid,
+ !ast_strlen_zero(p->refer->replaces_callid_totag) ? ";to-tag=" : "",
+ S_OR(p->refer->replaces_callid_totag, ""),
+ !ast_strlen_zero(p->refer->replaces_callid_fromtag) ? ";from-tag=" : "",
+ S_OR(p->refer->replaces_callid_fromtag, ""));
+ cb_data.replaces = ast_str_buffer(replaces_str);
+ } else {
+ cb_data.replaces = NULL;
+ }
if (!*nounlock) {
ast_channel_unlock(p->owner);
*nounlock = 1;
}
+
sip_pvt_unlock(p);
-
- /* Parking a call. DO NOT hold any locks while calling ast_parking_ext_valid() */
- if (localtransfer && ast_parking_ext_valid(refer_to, current.chan1, refer_to_context)) {
- sip_pvt_lock(p);
- ast_clear_flag(&p->flags[0], SIP_GOTREFER);
- p->refer->status = REFER_200OK;
- append_history(p, "Xfer", "REFER to call parking.");
- sip_pvt_unlock(p);
-
- ast_manager_event_multichan(EVENT_FLAG_CALL, "Transfer", 2, chans,
- "TransferMethod: SIP\r\n"
- "TransferType: Blind\r\n"
- "Channel: %s\r\n"
- "Uniqueid: %s\r\n"
- "SIP-Callid: %s\r\n"
- "TargetChannel: %s\r\n"
- "TargetUniqueid: %s\r\n"
- "TransferExten: %s\r\n"
- "Transfer2Parking: Yes\r\n",
- ast_channel_name(current.chan1),
- ast_channel_uniqueid(current.chan1),
- callid,
- ast_channel_name(current.chan2),
- ast_channel_uniqueid(current.chan2),
- refer_to);
-
- if (sipdebug) {
- ast_debug(4, "SIP transfer to parking: trying to park %s. Parked by %s\n", ast_channel_name(current.chan2), ast_channel_name(current.chan1));
- }
-
- /* DO NOT hold any locks while calling sip_park */
- if (sip_park(current.chan2, current.chan1, req, seqno, refer_to, refer_to_context)) {
- 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.
- * 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) {
- ast_debug(3, "chan1->name: %s\n", ast_channel_name(current.chan1));
- pbx_builtin_setvar_helper(current.chan1, "BLINDTRANSFER", ast_channel_name(current.chan2));
- }
-
- if (current.chan2) {
- pbx_builtin_setvar_helper(current.chan2, "BLINDTRANSFER", ast_channel_name(current.chan1));
- pbx_builtin_setvar_helper(current.chan2, "SIPDOMAIN", refer_to_domain);
- pbx_builtin_setvar_helper(current.chan2, "SIPTRANSFER", "yes");
- /* One for the new channel */
- pbx_builtin_setvar_helper(current.chan2, "_SIPTRANSFER", "yes");
- /* Attended transfer to remote host, prepare headers for the INVITE */
- if (!ast_strlen_zero(referred_by)) {
- pbx_builtin_setvar_helper(current.chan2, "_SIPTRANSFER_REFERER", referred_by);
- }
-
- /* When a call is transferred to voicemail from a Digium phone, there may be
- * a Diversion header present in the REFER with an appropriate reason parameter
- * set. We need to update the redirecting information appropriately.
- */
- ast_channel_lock(p->owner);
- sip_pvt_lock(p);
- ast_party_redirecting_init(&redirecting);
- memset(&update_redirecting, 0, sizeof(update_redirecting));
- change_redirecting_information(p, req, &redirecting, &update_redirecting, FALSE);
-
- /* Do not hold the pvt lock during a call that causes an indicate or an async_goto.
- * Those functions lock channels which will invalidate locking order if the pvt lock
- * is held.*/
- sip_pvt_unlock(p);
- ast_channel_unlock(p->owner);
- ast_channel_update_redirecting(current.chan2, &redirecting, &update_redirecting);
- ast_party_redirecting_free(&redirecting);
- }
-
+ transfer_res = ast_bridge_transfer_blind(transferer, refer_to, refer_to_context, blind_transfer_cb, &cb_data);
sip_pvt_lock(p);
- /* Generate a Replaces string to be used in the INVITE during attended transfer */
- if (!ast_strlen_zero(p->refer->replaces_callid)) {
- char tempheader[SIPBUFSIZE];
- 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,
- p->refer->replaces_callid_fromtag ? ";from-tag=" : "",
- p->refer->replaces_callid_fromtag);
-
- if (current.chan2) {
- sip_pvt_unlock(p);
- pbx_builtin_setvar_helper(current.chan2, "_SIPTRANSFER_REPLACES", tempheader);
- sip_pvt_lock(p);
- }
- }
-
- /* Connect the call */
-
- /* FAKE ringing if not attended transfer */
- if (!p->refer->attendedtransfer) {
- transmit_notify_with_sipfrag(p, seqno, "180 Ringing", FALSE);
- }
-
- /* For blind transfer, this will lead to a new call */
- /* For attended transfer to remote host, this will lead to
- a new SIP call with a replaces header, if the dial plan allows it
- */
- if (!current.chan2) {
- /* We have no bridge, so we're talking with Asterisk somehow */
- /* We need to masquerade this call */
- /* What to do to fix this situation:
- * Set up the new call in a new channel
- * Let the new channel masq into this channel
- Please add that code here :-)
- */
+
+ switch (transfer_res) {
+ case AST_BRIDGE_TRANSFER_INVALID:
+ res = -1;
p->refer->status = REFER_FAILED;
transmit_notify_with_sipfrag(p, seqno, "503 Service Unavailable (can't handle one-legged xfers)", TRUE);
- ast_clear_flag(&p->flags[0], SIP_GOTREFER);
append_history(p, "Xfer", "Refer failed (only bridged calls).");
+ break;
+ case AST_BRIDGE_TRANSFER_NOT_PERMITTED:
res = -1;
- goto handle_refer_cleanup;
- }
- ast_set_flag(&p->flags[0], SIP_DEFER_BYE_ON_TRANSFER); /* Delay hangup */
-
- sip_pvt_unlock(p);
-
- /* 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
- * 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);
-
- if (!res) {
- ast_manager_event_multichan(EVENT_FLAG_CALL, "Transfer", 2, chans,
- "TransferMethod: SIP\r\n"
- "TransferType: Blind\r\n"
- "Channel: %s\r\n"
- "Uniqueid: %s\r\n"
- "SIP-Callid: %s\r\n"
- "TargetChannel: %s\r\n"
- "TargetUniqueid: %s\r\n"
- "TransferExten: %s\r\n"
- "TransferContext: %s\r\n",
- ast_channel_name(current.chan1),
- ast_channel_uniqueid(current.chan1),
- callid,
- ast_channel_name(current.chan2),
- ast_channel_uniqueid(current.chan2),
- refer_to,
- refer_to_context);
- /* Success - we have a new channel */
- ast_debug(3, "%s transfer succeeded. Telling transferer.\n", attendedtransfer? "Attended" : "Blind");
-
- /* 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_channel_unlock(current.chan1);
-
- sip_pvt_lock(p);
- transmit_notify_with_sipfrag(p, seqno, "200 Ok", TRUE);
- if (p->refer->localtransfer) {
- p->refer->status = REFER_200OK;
- }
- if (p->owner) {
- ast_channel_hangupcause_set(p->owner, AST_CAUSE_NORMAL_CLEARING);
- }
+ p->refer->status = REFER_FAILED;
+ transmit_notify_with_sipfrag(p, seqno, "403 Forbidden", TRUE);
+ append_history(p, "Xfer", "Refer failed (bridge does not permit transfers)");
+ break;
+ case AST_BRIDGE_TRANSFER_FAIL:
+ res = -1;
+ p->refer->status = REFER_FAILED;
+ transmit_notify_with_sipfrag(p, seqno, "500 Internal Server Error", TRUE);
+ append_history(p, "Xfer", "Refer failed (internal error)");
+ break;
+ case AST_BRIDGE_TRANSFER_SUCCESS:
+ res = 0;
+ p->refer->status = REFER_200OK;
+ transmit_notify_with_sipfrag(p, seqno, "200 OK", TRUE);
+ ast_set_flag(&p->flags[0], SIP_DEFER_BYE_ON_TRANSFER);
append_history(p, "Xfer", "Refer succeeded.");
- ast_clear_flag(&p->flags[0], SIP_GOTREFER);
- /* Do not hangup call, the other side do that when we say 200 OK */
- /* We could possibly implement a timer here, auto congestion */
- res = 0;
- } else {
- sip_pvt_lock(p);
- 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");
- append_history(p, "Xfer", "Refer failed.");
- /* Failure of some kind */
- p->refer->status = REFER_FAILED;
- transmit_notify_with_sipfrag(p, seqno, "503 Service Unavailable", TRUE);
- ast_clear_flag(&p->flags[0], SIP_GOTREFER);
- res = -1;
- }
-
-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 */
+ break;
+ default:
+ break;
+ }
+
+ ast_clear_flag(&p->flags[0], SIP_GOTREFER);
+ ast_party_redirecting_free(&cb_data.redirecting);
return res;
}
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