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Fix up some T38 state change issues.

Browse Source 
(closes issue #11630)
Reported by: dimas
Patches:
      v2-sip-t38state.patch uploaded by dimas (license 88)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@100671 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Joshua Colp
2008-01-28 20:40:08 +00:00
parent 212db7a0d7
commit a1eeabcd41
1 changed files with 30 additions and 18 deletions
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48
channels/chan_sip.c
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@@ -1662,6 +1662,12 @@ static struct ast_config *notify_types; /*!< The list of manual NOTIFY types we
(head) = (element)->next; \
} while (0)
enum t38_action_flag {
SDP_T38_NONE = 0, /*!< Do not modify T38 information at all */
SDP_T38_INITIATE, /*!< Remote side has requested T38 with us */
SDP_T38_ACCEPT, /*!< Remote side accepted our T38 request */
};
/*---------------------------- Forward declarations of functions in chan_sip.c */
/*! \note This is added to help splitting up chan_sip.c into several files
in coming releases */
@@ -1753,7 +1759,7 @@ static void try_suggested_sip_codec(struct sip_pvt *p);
static const char* get_sdp_iterate(int* start, struct sip_request *req, const char *name);
static const char *get_sdp(struct sip_request *req, const char *name);
static int find_sdp(struct sip_request *req);
static int process_sdp(struct sip_pvt *p, struct sip_request *req);
static int process_sdp(struct sip_pvt *p, struct sip_request *req, int t38action);
static void add_codec_to_sdp(const struct sip_pvt *p, int codec, int sample_rate,
struct ast_str **m_buf, struct ast_str **a_buf,
int debug, int *min_packet_size);
@@ -6075,7 +6081,7 @@ static int find_sdp(struct sip_request *req)
Return 0 on success, a negative value on errors.
Must be called after find_sdp().
*/
static int process_sdp(struct sip_pvt *p, struct sip_request *req)
static int process_sdp(struct sip_pvt *p, struct sip_request *req, int t38action)
{
const char *m; /* SDP media offer */
const char *c;
@@ -6292,14 +6298,6 @@ static int process_sdp(struct sip_pvt *p, struct sip_request *req)
ast_verbose("Got T.38 offer in SDP in dialog %s\n", p->callid);
udptlportno = x;
numberofmediastreams++;
if (p->owner && p->lastinvite) {
p->t38.state = T38_PEER_REINVITE; /* T38 Offered in re-invite from remote party */
ast_debug(2, "T38 state changed to %d on channel %s\n", p->t38.state, p->owner ? p->owner->name : "<none>" );
} else {
p->t38.state = T38_PEER_DIRECT; /* T38 Offered directly from peer in first invite */
ast_debug(2, "T38 state changed to %d on channel %s\n", p->t38.state, p->owner ? p->owner->name : "<none>");
}
} else
ast_log(LOG_WARNING, "Unsupported SDP media type in offer: %s\n", m);
if (numberofports > 1)
@@ -6608,11 +6606,25 @@ static int process_sdp(struct sip_pvt *p, struct sip_request *req)
p->t38.capability,
p->t38.peercapability,
p->t38.jointcapability);
/* Remote party offers T38, we need to update state */
if (t38action == SDP_T38_ACCEPT) {
if (p->t38.state == T38_LOCAL_DIRECT || p->t38.state == T38_LOCAL_REINVITE)
p->t38.state = T38_ENABLED;
} else if (t38action == SDP_T38_INITIATE) {
if (p->owner && p->lastinvite) {
p->t38.state = T38_PEER_REINVITE; /* T38 Offered in re-invite from remote party */
} else {
p->t38.state = T38_PEER_DIRECT; /* T38 Offered directly from peer in first invite */
}
}
} else {
p->t38.state = T38_DISABLED;
ast_debug(3, "T38 state changed to %d on channel %s\n", p->t38.state, p->owner ? p->owner->name : "<none>");
}
ast_debug(3, "T38 state changed to %d on channel %s\n", p->t38.state, p->owner ? p->owner->name : "<none>");
/* Now gather all of the codecs that we are asked for: */
ast_rtp_get_current_formats(newaudiortp, &peercapability, &peernoncodeccapability);
ast_rtp_get_current_formats(newvideortp, &vpeercapability, &vpeernoncodeccapability);
@@ -14278,7 +14290,7 @@ static void handle_response_invite(struct sip_pvt *p, int resp, char *rest, stru
if (find_sdp(req)) {
if (p->invitestate != INV_CANCELLED)
p->invitestate = INV_EARLY_MEDIA;
res = process_sdp(p, req);
res = process_sdp(p, req, SDP_T38_NONE);
if (!req->ignore && p->owner) {
/* Queue a progress frame only if we have SDP in 180 or 182 */
ast_queue_control(p->owner, AST_CONTROL_PROGRESS);
@@ -14294,7 +14306,7 @@ static void handle_response_invite(struct sip_pvt *p, int resp, char *rest, stru
if (find_sdp(req)) {
if (p->invitestate != INV_CANCELLED)
p->invitestate = INV_EARLY_MEDIA;
res = process_sdp(p, req);
res = process_sdp(p, req, SDP_T38_NONE);
if (!req->ignore && p->owner) {
/* Queue a progress frame */
ast_queue_control(p->owner, AST_CONTROL_PROGRESS);
@@ -14308,7 +14320,7 @@ static void handle_response_invite(struct sip_pvt *p, int resp, char *rest, stru
ast_log(LOG_WARNING, "Unable to cancel SIP destruction. Expect bad things.\n");
p->authtries = 0;
if (find_sdp(req)) {
if ((res = process_sdp(p, req)) && !req->ignore)
if ((res = process_sdp(p, req, SDP_T38_ACCEPT)) && !req->ignore)
if (!reinvite)
/* This 200 OK's SDP is not acceptable, so we need to ack, then hangup */
/* For re-invites, we try to recover */
@@ -15114,7 +15126,7 @@ static void handle_response(struct sip_pvt *p, int resp, char *rest, struct sip_
if (!req->ignore && sip_cancel_destroy(p))
ast_log(LOG_WARNING, "Unable to cancel SIP destruction. Expect bad things.\n");
if (find_sdp(req))
process_sdp(p, req);
process_sdp(p, req, SDP_T38_NONE);
if (p->owner) {
/* Queue a progress frame */
ast_queue_control(p->owner, AST_CONTROL_PROGRESS);
@@ -16045,7 +16057,7 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
ast_clear_flag(&p->flags[0], SIP_OUTGOING); /* This is now an inbound dialog */
/* Handle SDP here if we already have an owner */
if (find_sdp(req)) {
if (process_sdp(p, req)) {
if (process_sdp(p, req, SDP_T38_INITIATE)) {
transmit_response(p, "488 Not acceptable here", req);
if (!p->lastinvite)
sip_scheddestroy(p, DEFAULT_TRANS_TIMEOUT);
@@ -16086,7 +16098,7 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
/* We have a succesful authentication, process the SDP portion if there is one */
if (find_sdp(req)) {
if (process_sdp(p, req)) {
if (process_sdp(p, req, SDP_T38_INITIATE)) {
/* Unacceptable codecs */
transmit_response_reliable(p, "488 Not acceptable here", req);
p->invitestate = INV_COMPLETED;
@@ -17712,7 +17724,7 @@ static int handle_incoming(struct sip_pvt *p, struct sip_request *req, struct so
p->pendinginvite = 0;
__sip_ack(p, seqno, 1 /* response */, 0);
if (find_sdp(req)) {
if (process_sdp(p, req))
if (process_sdp(p, req, SDP_T38_NONE))
return -1;
}
check_pendings(p);