[svn-commits] tilghman: trunk r129804 - in /trunk: ./ channels/chan_iax2.c
SVN commits to the Digium repositories
svn-commits at lists.digium.com
Thu Jul 10 17:06:07 CDT 2008
Author: tilghman
Date: Thu Jul 10 17:06:07 2008
New Revision: 129804
URL: http://svn.digium.com/view/asterisk?view=rev&rev=129804
Log:
Merged revisions 129803 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.4
........
r129803 | tilghman | 2008-07-10 16:57:05 -0500 (Thu, 10 Jul 2008) | 8 lines
Correctly deal with duplicate NEW frames (due to retransmission). Also, fixup
the destination call number matching to be more strict and reliable.
(closes issue #12963)
Reported by: jpgrayson
Patches:
chan_iax2_dup_new_fix3.patch uploaded by jpgrayson (license 492)
Tested by: jpgrayson, Corydon76
........
Modified:
trunk/ (props changed)
trunk/channels/chan_iax2.c
Propchange: trunk/
------------------------------------------------------------------------------
Binary property 'branch-1.4-merged' - no diff available.
Modified: trunk/channels/chan_iax2.c
URL: http://svn.digium.com/view/asterisk/trunk/channels/chan_iax2.c?view=diff&rev=129804&r1=129803&r2=129804
==============================================================================
--- trunk/channels/chan_iax2.c (original)
+++ trunk/channels/chan_iax2.c Thu Jul 10 17:06:07 2008
@@ -1496,13 +1496,13 @@
#define NEW_ALLOW 1
#define NEW_FORCE 2
-static int match(struct sockaddr_in *sin, unsigned short callno, unsigned short dcallno, const struct chan_iax2_pvt *cur, int check_dcallno)
+static int match(struct sockaddr_in *sin, unsigned short callno, unsigned short dcallno, const struct chan_iax2_pvt *cur)
{
if ((cur->addr.sin_addr.s_addr == sin->sin_addr.s_addr) &&
(cur->addr.sin_port == sin->sin_port)) {
/* This is the main host */
if ( (cur->peercallno == 0 || cur->peercallno == callno) &&
- (check_dcallno ? dcallno == cur->callno : 1) ) {
+ (dcallno == 0 || cur->callno == dcallno) ) {
/* That's us. Be sure we keep track of the peer call number */
return 1;
}
@@ -1620,7 +1620,7 @@
/*
* \note Calling this function while holding another pvt lock can cause a deadlock.
*/
-static int __find_callno(unsigned short callno, unsigned short dcallno, struct sockaddr_in *sin, int new, int sockfd, int return_locked, int check_dcallno)
+static int __find_callno(unsigned short callno, unsigned short dcallno, struct sockaddr_in *sin, int new, int sockfd, int return_locked)
{
int res = 0;
int x;
@@ -1633,8 +1633,6 @@
struct chan_iax2_pvt tmp_pvt = {
.callno = dcallno,
.peercallno = callno,
- /* hack!! */
- .frames_received = check_dcallno,
};
memcpy(&tmp_pvt.addr, sin, sizeof(tmp_pvt.addr));
@@ -1652,7 +1650,7 @@
/* This will occur on the first response to a message that we initiated,
* such as a PING. */
- if (callno && dcallno && iaxs[dcallno] && !iaxs[dcallno]->peercallno && match(sin, callno, dcallno, iaxs[dcallno], check_dcallno)) {
+ if (callno && dcallno && iaxs[dcallno] && !iaxs[dcallno]->peercallno && match(sin, callno, dcallno, iaxs[dcallno])) {
iaxs[dcallno]->peercallno = callno;
res = dcallno;
store_by_peercallno(iaxs[dcallno]);
@@ -1675,7 +1673,7 @@
ast_mutex_lock(&iaxsl[x]);
if (iaxs[x]) {
/* Look for an exact match */
- if (match(sin, callno, dcallno, iaxs[x], check_dcallno)) {
+ if (match(sin, callno, dcallno, iaxs[x])) {
res = x;
}
}
@@ -1686,7 +1684,7 @@
ast_mutex_lock(&iaxsl[x]);
if (iaxs[x]) {
/* Look for an exact match */
- if (match(sin, callno, dcallno, iaxs[x], check_dcallno)) {
+ if (match(sin, callno, dcallno, iaxs[x])) {
res = x;
}
}
@@ -1770,14 +1768,14 @@
return res;
}
-static int find_callno(unsigned short callno, unsigned short dcallno, struct sockaddr_in *sin, int new, int sockfd, int full_frame) {
-
- return __find_callno(callno, dcallno, sin, new, sockfd, 0, full_frame);
-}
-
-static int find_callno_locked(unsigned short callno, unsigned short dcallno, struct sockaddr_in *sin, int new, int sockfd, int full_frame) {
-
- return __find_callno(callno, dcallno, sin, new, sockfd, 1, full_frame);
+static int find_callno(unsigned short callno, unsigned short dcallno, struct sockaddr_in *sin, int new, int sockfd) {
+
+ return __find_callno(callno, dcallno, sin, new, sockfd, 0);
+}
+
+static int find_callno_locked(unsigned short callno, unsigned short dcallno, struct sockaddr_in *sin, int new, int sockfd) {
+
+ return __find_callno(callno, dcallno, sin, new, sockfd, 1);
}
/*!
@@ -7825,7 +7823,7 @@
/* Stop if we don't have enough data */
if (len > packet_len)
break;
- fr->callno = find_callno_locked(callno & ~IAX_FLAG_FULL, 0, sin, NEW_PREVENT, sockfd, 0);
+ fr->callno = find_callno_locked(callno & ~IAX_FLAG_FULL, 0, sin, NEW_PREVENT, sockfd);
if (!fr->callno)
continue;
@@ -8008,7 +8006,7 @@
}
/* This is a video frame, get call number */
- fr->callno = find_callno(ntohs(vh->callno) & ~0x8000, dcallno, &sin, new, fd, 0);
+ fr->callno = find_callno(ntohs(vh->callno) & ~0x8000, dcallno, &sin, new, fd);
minivid = 1;
} else if ((meta->zeros == 0) && !(ntohs(meta->metacmd) & 0x8000))
return socket_process_meta(res, meta, &sin, fd, fr);
@@ -8023,14 +8021,37 @@
return 1;
}
- /* Get the destination call number */
- dcallno = ntohs(fh->dcallno) & ~IAX_FLAG_RETRANS;
/* Retrieve the type and subclass */
f.frametype = fh->type;
if (f.frametype == AST_FRAME_VIDEO) {
f.subclass = uncompress_subclass(fh->csub & ~0x40) | ((fh->csub >> 6) & 0x1);
} else {
f.subclass = uncompress_subclass(fh->csub);
+ }
+
+ /*
+ * We enforce accurate destination call numbers for all full frames except
+ * NEW, LAGRQ, and PING commands. For these, we leave dcallno set to 0 to
+ * avoid having find_callno() use it when matching against existing calls.
+ *
+ * For NEW commands, the destination call is always ignored. See section
+ * 6.2.2 of the iax2 RFC.
+ *
+ * For LAGRQ and PING commands, this is because older versions of Asterisk
+ * schedule these commands to get sent very quickly, and they will sometimes
+ * be sent before they receive the first frame from the other side. When
+ * that happens, it doesn't contain the destination call number. However,
+ * not checking it for these frames is safe.
+ *
+ * Discussed in the following thread:
+ * http://lists.digium.com/pipermail/asterisk-dev/2008-May/033217.html
+ */
+ if (f.frametype != AST_FRAME_IAX ||
+ (f.subclass != IAX_COMMAND_NEW &&
+ f.subclass != IAX_COMMAND_PING &&
+ f.subclass != IAX_COMMAND_LAGRQ)) {
+ /* Get the destination call number */
+ dcallno = ntohs(fh->dcallno) & ~IAX_FLAG_RETRANS;
}
if ((f.frametype == AST_FRAME_IAX) && ((f.subclass == IAX_COMMAND_NEW) || (f.subclass == IAX_COMMAND_REGREQ) ||
(f.subclass == IAX_COMMAND_POKE) || (f.subclass == IAX_COMMAND_FWDOWNL) ||
@@ -8043,25 +8064,7 @@
}
if (!fr->callno) {
- int check_dcallno = 0;
-
- /*
- * We enforce accurate destination call numbers for all full frames except
- * LAGRQ and PING commands. This is because older versions of Asterisk
- * schedule these commands to get sent very quickly, and they will sometimes
- * be sent before they receive the first frame from the other side. When
- * that happens, it doesn't contain the destination call number. However,
- * not checking it for these frames is safe.
- *
- * Discussed in the following thread:
- * http://lists.digium.com/pipermail/asterisk-dev/2008-May/033217.html
- */
-
- if (ntohs(mh->callno) & IAX_FLAG_FULL) {
- check_dcallno = f.frametype == AST_FRAME_IAX ? (f.subclass != IAX_COMMAND_PING && f.subclass != IAX_COMMAND_LAGRQ) : 1;
- }
-
- fr->callno = find_callno(ntohs(mh->callno) & ~IAX_FLAG_FULL, dcallno, &sin, new, fd, check_dcallno);
+ fr->callno = find_callno(ntohs(mh->callno) & ~IAX_FLAG_FULL, dcallno, &sin, new, fd);
}
if (fr->callno > 0)
@@ -8148,6 +8151,7 @@
if (
((f.subclass != IAX_COMMAND_ACK) &&
(f.subclass != IAX_COMMAND_INVAL) &&
+ (f.subclass != IAX_COMMAND_NEW) && /* for duplicate/retrans NEW frames */
(f.subclass != IAX_COMMAND_TXCNT) &&
(f.subclass != IAX_COMMAND_TXREADY) && /* for attended transfer */
(f.subclass != IAX_COMMAND_TXREL) && /* for attended transfer */
@@ -9721,7 +9725,7 @@
if (!reg->callno) {
ast_debug(3, "Allocate call number\n");
- reg->callno = find_callno_locked(0, 0, ®->addr, NEW_FORCE, defaultsockfd, 0);
+ reg->callno = find_callno_locked(0, 0, ®->addr, NEW_FORCE, defaultsockfd);
if (reg->callno < 1) {
ast_log(LOG_WARNING, "Unable to create call for registration\n");
return -1;
@@ -9772,7 +9776,7 @@
memset(&ied, 0, sizeof(ied));
iax_ie_append_raw(&ied, IAX_IE_PROVISIONING, provdata.buf, provdata.pos);
- callno = find_callno_locked(0, 0, &sin, NEW_FORCE, cai.sockfd, 0);
+ callno = find_callno_locked(0, 0, &sin, NEW_FORCE, cai.sockfd);
if (!callno)
return -1;
@@ -9933,7 +9937,7 @@
}
if (heldcall)
ast_mutex_unlock(&iaxsl[heldcall]);
- callno = peer->callno = find_callno(0, 0, &peer->addr, NEW_FORCE, peer->sockfd, 0);
+ callno = peer->callno = find_callno(0, 0, &peer->addr, NEW_FORCE, peer->sockfd);
if (heldcall)
ast_mutex_lock(&iaxsl[heldcall]);
if (peer->callno < 1) {
@@ -10016,7 +10020,7 @@
if (pds.port)
sin.sin_port = htons(atoi(pds.port));
- callno = find_callno_locked(0, 0, &sin, NEW_FORCE, cai.sockfd, 0);
+ callno = find_callno_locked(0, 0, &sin, NEW_FORCE, cai.sockfd);
if (callno < 1) {
ast_log(LOG_WARNING, "Unable to create call\n");
*cause = AST_CAUSE_CONGESTION;
@@ -11380,7 +11384,7 @@
ast_debug(1, "peer: %s, username: %s, password: %s, context: %s\n",
pds.peer, pds.username, pds.password, pds.context);
- callno = find_callno_locked(0, 0, &sin, NEW_FORCE, cai.sockfd, 0);
+ callno = find_callno_locked(0, 0, &sin, NEW_FORCE, cai.sockfd);
if (callno < 1) {
ast_log(LOG_WARNING, "Unable to create call\n");
return -1;
@@ -12104,11 +12108,7 @@
{
struct chan_iax2_pvt *pvt = obj, *pvt2 = arg;
- /* The frames_received field is used to hold whether we're matching
- * against a full frame or not ... */
-
- return match(&pvt2->addr, pvt2->peercallno, pvt2->callno, pvt,
- pvt2->frames_received) ? CMP_MATCH : 0;
+ return match(&pvt2->addr, pvt2->peercallno, pvt2->callno, pvt) ? CMP_MATCH : 0;
}
/*! \brief Load IAX2 module, load configuraiton ---*/
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