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comment and slightly restructure handle_request() in the part that handles

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responses, so that there is a common exit point.
Mark two places where probably we could return -1 instead of 0 to report
an error to the caller.
(change triggered by investigations on how the 'SIP_PKT_IGNORE' field was used).

nothing to backport from this commit



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@76371 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Luigi Rizzo
2007-07-22 19:08:37 +00:00
parent 88f18dc9d7
commit db12b404fc
1 changed files with 18 additions and 10 deletions
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28
channels/chan_sip.c
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@@ -15700,26 +15700,34 @@ static int handle_request(struct sip_pvt *p, struct sip_request *req, struct soc
/* Find out SIP method for incoming request */
if (req->method == SIP_RESPONSE) { /* Response to our request */
/* When we get here, we know this is a SIP dialog where we've sent
a request and have a response, or at least get a response
within an existing dialog */
/* Response to our request -- Do some sanity checks */
* a request and have a response, or at least get a response
* within an existing dialog. Do some sanity checks, then
* possibly process the request. In all cases, there function
* terminates at the end of this block
*/
int ret = 0;
if (p->ocseq < seqno) {
ast_debug(1, "Ignoring out of order response %d (expecting %d)\n", seqno, p->ocseq);
return -1;
ret = -1;
} else if (p->ocseq != seqno) {
/* ignore means "don't do anything with it" but still have to
respond appropriately */
* respond appropriately.
* But in this case this is a response already, so we really
* have nothing to do with this message, and even setting the
* ignore flag is pointless.
*/
req->ignore = 1;
append_history(p, "Ignore", "Ignoring this retransmit\n");
} else if (e) {
e = ast_skip_blanks(e);
if (sscanf(e, "%d %n", &respid, &len) != 1) {
ast_log(LOG_WARNING, "Invalid response: '%s'\n", e);
} else {
if (respid <= 0) {
ast_log(LOG_WARNING, "Invalid SIP response code: '%d'\n", respid);
return 0;
}
/* XXX maybe should do ret = -1; */
} else if (respid <= 0) {
ast_log(LOG_WARNING, "Invalid SIP response code: '%d'\n", respid);
/* XXX maybe should do ret = -1; */
} else { /* finally, something worth processing */
/* More SIP ridiculousness, we have to ignore bogus contacts in 100 etc responses */
if ((respid == 200) || ((respid >= 300) && (respid <= 399)))
extract_uri(p, req);