Merged revisions 204243,204246 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.4 ........ r204243 | mmichelson | 2009-06-29 16:23:43 -0500 (Mon, 29 Jun 2009) | 22 lines Fix a problem where chan_sip would ignore "old" but valid responses. chan_sip has had a problem for quite a long time that would manifest when Asterisk would send multiple SIP responses on the same dialog before receiving a response. The problem occurred because chan_sip only kept track of the highest outgoing sequence number used on the dialog. If Asterisk sent two requests out, and a response arrived for the first request sent, then Asterisk would ignore the response. The result was that Asterisk would continue retransmitting the requests and ignoring the responses until the maximum number of retransmissions had been reached. The fix here is to rearrange the code a bit so that instead of simply comparing the sequence number of the response to our latest outgoing sequence number, we walk our list of outstanding packets and determine if there is a match. If there is, we continue. If not, then we ignore the response. In doing this, I found a few completely useless variables that I have now removed. (closes issue #11231) Reported by: flefoll Review: https://reviewboard.asterisk.org/r/298 ........ r204246 | mmichelson | 2009-06-29 16:37:05 -0500 (Mon, 29 Jun 2009) | 3 lines Fix build oops. ........ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@204247 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Mark Michelson
parent
e840307ad1
commit
200f1dc19e
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@ -1751,7 +1751,6 @@ struct sip_pvt {
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ast_group_t callgroup; /*!< Call group */
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ast_group_t pickupgroup; /*!< Pickup group */
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int lastinvite; /*!< Last Cseq of invite */
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int lastnoninvite; /*!< Last Cseq of non-invite */
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struct ast_flags flags[2]; /*!< SIP_ flags */
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/* boolean flags that don't belong in flags */
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@ -2403,7 +2402,7 @@ static struct sip_pvt *sip_destroy(struct sip_pvt *p);
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static void *dialog_unlink_all(struct sip_pvt *dialog, int lockowner, int lockdialoglist);
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static void *registry_unref(struct sip_registry *reg, char *tag);
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static void __sip_destroy(struct sip_pvt *p, int lockowner, int lockdialoglist);
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static void __sip_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod);
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static int __sip_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod);
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static void __sip_pretend_ack(struct sip_pvt *p);
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static int __sip_semi_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod);
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static int auto_congest(const void *arg);
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@ -3891,10 +3890,11 @@ static int sip_cancel_destroy(struct sip_pvt *p)
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/*! \brief Acknowledges receipt of a packet and stops retransmission
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* called with p locked*/
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static void __sip_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod)
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static int __sip_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod)
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{
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struct sip_pkt *cur, *prev = NULL;
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const char *msg = "Not Found"; /* used only for debugging */
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int res = FALSE;
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/* If we have an outbound proxy for this dialog, then delete it now since
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the rest of the requests in this dialog needs to follow the routing.
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@ -3909,6 +3909,7 @@ static void __sip_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod)
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if (cur->seqno != seqno || cur->is_resp != resp)
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continue;
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if (cur->is_resp || cur->method == sipmethod) {
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res = TRUE;
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msg = "Found";
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if (!resp && (seqno == p->pendinginvite)) {
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ast_debug(1, "Acked pending invite %d\n", p->pendinginvite);
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@ -3949,6 +3950,7 @@ static void __sip_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod)
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}
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ast_debug(1, "Stopping retransmission on '%s' of %s %d: Match %s\n",
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p->callid, resp ? "Response" : "Request", seqno, msg);
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return res;
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}
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/*! \brief Pretend to ack all packets
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@ -3973,7 +3975,7 @@ static void __sip_pretend_ack(struct sip_pvt *p)
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static int __sip_semi_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod)
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{
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struct sip_pkt *cur;
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int res = -1;
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int res = FALSE;
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for (cur = p->packets; cur; cur = cur->next) {
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if (cur->seqno == seqno && cur->is_resp == resp &&
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@ -3984,7 +3986,7 @@ static int __sip_semi_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod)
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ast_debug(4, "*** SIP TIMER: Cancelling retransmission #%d - %s (got response)\n", cur->retransid, sip_methods[sipmethod].text);
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}
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AST_SCHED_DEL(sched, cur->retransid);
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res = 0;
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res = TRUE;
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break;
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}
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}
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@ -11215,8 +11217,6 @@ static int transmit_notify_with_sipfrag(struct sip_pvt *p, int cseq, char *messa
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if (!p->initreq.headers)
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initialize_initreq(p, &req);
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p->lastnoninvite = p->ocseq;
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return send_request(p, &req, XMIT_RELIABLE, p->ocseq);
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}
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@ -18535,6 +18535,7 @@ static void handle_response(struct sip_pvt *p, int resp, const char *rest, struc
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struct ast_channel *owner;
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int sipmethod;
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int res = 1;
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int ack_res;
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const char *c = get_header(req, "Cseq");
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/* GCC 4.2 complains if I try to cast c as a char * when passing it to ast_skip_nonblanks, so make a copy of it */
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char *c_copy = ast_strdupa(c);
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@ -18552,10 +18553,16 @@ static void handle_response(struct sip_pvt *p, int resp, const char *rest, struc
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owner->hangupcause = hangup_sip2cause(resp);
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/* Acknowledge whatever it is destined for */
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if ((resp >= 100) && (resp <= 199))
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__sip_semi_ack(p, seqno, 0, sipmethod);
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else
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__sip_ack(p, seqno, 0, sipmethod);
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if ((resp >= 100) && (resp <= 199)) {
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ack_res = __sip_semi_ack(p, seqno, 0, sipmethod);
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} else {
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ack_res = __sip_ack(p, seqno, 0, sipmethod);
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}
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if (ack_res == FALSE) {
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append_history(p, "Ignore", "Ignoring this retransmit\n");
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return;
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}
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/* If this is a NOTIFY for a subscription clear the flag that indicates that we have a NOTIFY pending */
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if (!p->owner && sipmethod == SIP_NOTIFY && p->pendinginvite)
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@ -21938,7 +21945,7 @@ static int handle_incoming(struct sip_pvt *p, struct sip_request *req, struct so
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/* Get the command XXX */
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cmd = REQ_OFFSET_TO_STR(req, rlPart1);
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e = REQ_OFFSET_TO_STR(req, rlPart2);
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e = ast_skip_blanks(REQ_OFFSET_TO_STR(req, rlPart2));
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/* Save useragent of the client */
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useragent = get_header(req, "User-Agent");
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@ -21947,40 +21954,32 @@ static int handle_incoming(struct sip_pvt *p, struct sip_request *req, struct so
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/* Find out SIP method for incoming request */
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if (req->method == SIP_RESPONSE) { /* Response to our request */
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/* When we get here, we know this is a SIP dialog where we've sent
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* a request and have a response, or at least get a response
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* within an existing dialog. Do some sanity checks, then
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* possibly process the request. In all cases, there function
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* terminates at the end of this block
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/* ignore means "don't do anything with it" but still have to
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* respond appropriately.
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* But in this case this is a response already, so we really
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* have nothing to do with this message, and even setting the
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* ignore flag is pointless.
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*/
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int ret = 0;
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if (p->ocseq < seqno && p->lastinvite != seqno && p->lastnoninvite != seqno) {
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ast_debug(1, "Ignoring out of order response %d (expecting %d)\n", seqno, p->ocseq);
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ret = -1;
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} else if (p->ocseq != seqno && p->lastinvite != seqno && p->lastnoninvite != seqno) {
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/* ignore means "don't do anything with it" but still have to
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* respond appropriately.
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* But in this case this is a response already, so we really
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* have nothing to do with this message, and even setting the
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* ignore flag is pointless.
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*/
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req->ignore = 1;
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append_history(p, "Ignore", "Ignoring this retransmit\n");
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} else if (e) {
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e = ast_skip_blanks(e);
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if (sscanf(e, "%d %n", &respid, &len) != 1) {
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ast_log(LOG_WARNING, "Invalid response: '%s'\n", e);
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/* XXX maybe should do ret = -1; */
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} else if (respid <= 0) {
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ast_log(LOG_WARNING, "Invalid SIP response code: '%d'\n", respid);
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/* XXX maybe should do ret = -1; */
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} else { /* finally, something worth processing */
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/* More SIP ridiculousness, we have to ignore bogus contacts in 100 etc responses */
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if ((respid == 200) || ((respid >= 300) && (respid <= 399)))
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extract_uri(p, req);
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handle_response(p, respid, e + len, req, seqno);
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if (ast_strlen_zero(e)) {
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return 0;
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}
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if (sscanf(e, "%d %n", &respid, &len) != 1) {
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ast_log(LOG_WARNING, "Invalid response: '%s'\n", e);
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return 0;
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}
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if (respid <= 0) {
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ast_log(LOG_WARNING, "Invalid SIP response code: '%d'\n", respid);
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return 0;
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}
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if (p->ocseq && (p->ocseq < seqno)) {
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if (option_debug)
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ast_log(LOG_DEBUG, "Ignoring out of order response %d (expecting %d)\n", seqno, p->ocseq);
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return -1;
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} else {
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if ((respid == 200) || ((respid >= 300) && (respid <= 399))) {
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extract_uri(p, req);
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}
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handle_response(p, respid, e + len, req, seqno);
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}
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return 0;
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}
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