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Merged revisions 141809 via svnmerge from

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https://origsvn.digium.com/svn/asterisk/branches/1.4

........
r141809 | mmichelson | 2008-09-08 16:10:10 -0500 (Mon, 08 Sep 2008) | 14 lines

Fix pedantic mode of chan_sip to only check the
remote tag of an endpoint once a dialog has
been confirmed. Up until that point, it is possible
and legal for the far-end to send provisional
responses with a different To: tag each time. With
this patch applied, these provisional messages
will not cause a matching problem.

(closes issue #11536)
Reported by: ibc
Patches:
      11536v2.patch uploaded by putnopvut (license 60)


........


git-svn-id: http://svn.digium.com/svn/asterisk/trunk@141810 f38db490-d61c-443f-a65b-d21fe96a405b
This commit is contained in:
mmichelson 2008-09-08 21:18:49 +00:00
parent a79fa30656
commit 6e27b7b1a7
1 changed files with 45 additions and 2 deletions
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47
channels/chan_sip.c
View file

@ -1035,6 +1035,7 @@ struct sip_auth {
#define SIP_PAGE2_RTAUTOCLEAR (1 << 2) /*!< GP: Should we clean memory from peers after expiry? */
/* Space for addition of other realtime flags in the future */
#define SIP_PAGE2_STATECHANGEQUEUE (1 << 9) /*!< D: Unsent state pending change exists */
#define SIP_PAGE2_DIALOG_ESTABLISHED (1 << 29) /*!< 29: Has a dialog been established? */
#define SIP_PAGE2_VIDEOSUPPORT (1 << 14) /*!< DP: Video supported if offered? */
#define SIP_PAGE2_TEXTSUPPORT (1 << 15) /*!< GDP: Global text enable */
@ -5147,9 +5148,11 @@ static int sip_answer(struct ast_channel *ast)
if (p->t38.state == T38_PEER_DIRECT) {
change_t38_state(p, T38_ENABLED);
res = transmit_response_with_t38_sdp(p, "200 OK", &p->initreq, XMIT_CRITICAL);
ast_set_flag(&p->flags[1], SIP_PAGE2_DIALOG_ESTABLISHED);
} else {
ast_rtp_new_source(p->rtp);
res = transmit_response_with_sdp(p, "200 OK", &p->initreq, XMIT_CRITICAL, FALSE);
ast_set_flag(&p->flags[1], SIP_PAGE2_DIALOG_ESTABLISHED);
}
}
sip_pvt_unlock(p);
@ -6230,6 +6233,7 @@ static struct sip_pvt *find_call(struct sip_request *req, struct sockaddr_in *si
}
}
<<<<<<< .working
restartsearch:
if (!pedanticsipchecking) {
struct sip_pvt tmp_dialog = {
@ -6249,6 +6253,35 @@ restartsearch:
ao2_unlock(dialogs);
usleep(1);
goto restartsearch;
=======
ast_mutex_lock(&iflock);
for (p = iflist; p; p = p->next) {
/* In pedantic, we do not want packets with bad syntax to be connected to a PVT */
int found = FALSE;
if (ast_strlen_zero(p->callid))
continue;
if (req->method == SIP_REGISTER)
found = (!strcmp(p->callid, callid));
else {
found = !strcmp(p->callid, callid);
if (pedanticsipchecking && found) {
found = ast_strlen_zero(tag) || ast_strlen_zero(p->theirtag) || !ast_test_flag(&p->flags[1], SIP_PAGE2_DIALOG_ESTABLISHED) || !strcmp(p->theirtag, tag);
}
}
if (option_debug > 4)
ast_log(LOG_DEBUG, "= %s Their Call ID: %s Their Tag %s Our tag: %s\n", found ? "Found" : "No match", p->callid, p->theirtag, p->tag);
/* If we get a new request within an existing to-tag - check the to tag as well */
if (pedanticsipchecking && found && req->method != SIP_RESPONSE) { /* SIP Request */
if (p->tag[0] == '\0' && totag[0]) {
/* We have no to tag, but they have. Wrong dialog */
found = FALSE;
} else if (totag[0]) { /* Both have tags, compare them */
if (strcmp(totag, p->tag)) {
found = FALSE; /* This is not our packet */
}
>>>>>>> .merge-right.r141809
}
ao2_unlock(dialogs);
return p;
@ -15360,6 +15393,7 @@ static void handle_response_invite(struct sip_pvt *p, int resp, char *rest, stru
/* If I understand this right, the branch is different for a non-200 ACK only */
p->invitestate = INV_TERMINATED;
ast_set_flag(&p->flags[1], SIP_PAGE2_DIALOG_ESTABLISHED);
xmitres = transmit_request(p, SIP_ACK, seqno, XMIT_UNRELIABLE, TRUE);
check_pendings(p);
break;
@ -15890,8 +15924,12 @@ static void handle_response(struct sip_pvt *p, int resp, char *rest, struct sip_
handle_response_notify(p, resp, rest, req, seqno);
} else if (sipmethod == SIP_REGISTER)
res = handle_response_register(p, resp, rest, req, seqno);
else if (sipmethod == SIP_BYE) /* Ok, we're ready to go */
else if (sipmethod == SIP_BYE) { /* Ok, we're ready to go */
p->needdestroy = 1;
ast_clear_flag(&p->flags[1], SIP_PAGE2_DIALOG_ESTABLISHED);
} else if (sipmethod == SIP_SUBSCRIBE) {
ast_set_flag(&p->flags[1], SIP_PAGE2_DIALOG_ESTABLISHED);
}
break;
case 202: /* Transfer accepted */
if (sipmethod == SIP_REFER)
@ -17680,6 +17718,7 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
}
} else {
/* The other side is already setup for T.38 most likely so we need to acknowledge this too */
ast_set_flag(&p->flags[1], SIP_PAGE2_DIALOG_ESTABLISHED);
transmit_response_with_t38_sdp(p, "200 OK", req, XMIT_CRITICAL);
change_t38_state(p, T38_ENABLED);
}
@ -17693,6 +17732,7 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
}
} else {
/* we are not bridged in a call */
ast_set_flag(&p->flags[1], SIP_PAGE2_DIALOG_ESTABLISHED);
transmit_response_with_t38_sdp(p, "200 OK", req, XMIT_CRITICAL);
change_t38_state(p, T38_ENABLED);
}
@ -17719,6 +17759,7 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
/* Respond to normal re-invite */
if (sendok) {
/* If this is not a re-invite or something to ignore - it's critical */
ast_set_flag(&p->flags[1], SIP_PAGE2_DIALOG_ESTABLISHED);
transmit_response_with_sdp(p, "200 OK", req, (reinvite ? XMIT_RELIABLE : (req->ignore ? XMIT_UNRELIABLE : XMIT_CRITICAL)), p->session_modify == TRUE ? FALSE:TRUE);
}
}
@ -18451,6 +18492,7 @@ static int handle_request_bye(struct sip_pvt *p, struct sip_request *req)
sip_scheddestroy(p, DEFAULT_TRANS_TIMEOUT);
ast_debug(3, "Received bye, no owner, selfdestruct soon.\n");
}
ast_clear_flag(&p->flags[1], SIP_PAGE2_DIALOG_ESTABLISHED);
transmit_response(p, "200 OK", req);
return 1;
@ -18733,6 +18775,7 @@ static int handle_request_subscribe(struct sip_pvt *p, struct sip_request *req,
sip_scheddestroy(p, (p->expiry + 10) * 1000); /* Set timer for destruction of call at expiration */
if (p->subscribed == MWI_NOTIFICATION) {
ast_set_flag(&p->flags[1], SIP_PAGE2_DIALOG_ESTABLISHED);
transmit_response(p, "200 OK", req);
if (p->relatedpeer) { /* Send first notification */
ao2_lock(p->relatedpeer); /* was WRLOCK */
@ -18749,7 +18792,7 @@ static int handle_request_subscribe(struct sip_pvt *p, struct sip_request *req,
p->needdestroy = 1;
return 0;
}
ast_set_flag(&p->flags[1], SIP_PAGE2_DIALOG_ESTABLISHED);
transmit_response(p, "200 OK", req);
transmit_state_notify(p, firststate, 1, FALSE); /* Send first notification */
append_history(p, "Subscribestatus", "%s", ast_extension_state2str(firststate));