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IAX2: Transfer Reject: Lock bridgecallno before touching it, refactor

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1). When touching the bridgecallno, we need to lock it.

2). Remove magic number '0' and replace with TRANSFER_NONE.

3). Exit early if no bridgecallno.

4). Reduce indentation.

Reported by: alecdavis
Tested by: alecdavis
alecdavis (license 585)

Review https://reviewboard.asterisk.org/r/2613/
........

Merged revisions 391333 from http://svn.asterisk.org/svn/asterisk/branches/1.8


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@391334 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Alec L Davis
2013-06-11 08:10:12 +00:00
parent 4a99d74105
commit a90ad16e55
1 changed files with 19 additions and 6 deletions
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channels/chan_iax2.c
+19 -6
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@@ -11509,15 +11509,28 @@ immediatedial:
}
break;
case IAX_COMMAND_TXREJ:
iaxs[fr->callno]->transferring = 0;
ast_verb(3, "Channel '%s' unable to transfer\n", iaxs[fr->callno]->owner ? ast_channel_name(iaxs[fr->callno]->owner) : "<Unknown>");
memset(&iaxs[fr->callno]->transfer, 0, sizeof(iaxs[fr->callno]->transfer));
if (iaxs[fr->callno]->bridgecallno) {
if (iaxs[iaxs[fr->callno]->bridgecallno]->transferring) {
iaxs[iaxs[fr->callno]->bridgecallno]->transferring = 0;
send_command(iaxs[iaxs[fr->callno]->bridgecallno], AST_FRAME_IAX, IAX_COMMAND_TXREJ, 0, NULL, 0, -1);
while (ast_mutex_trylock(&iaxsl[iaxs[fr->callno]->bridgecallno])) {
DEADLOCK_AVOIDANCE(&iaxsl[fr->callno]);
}
if (!iaxs[fr->callno]) {
break;
}
}
iaxs[fr->callno]->transferring = TRANSFER_NONE;
ast_verb(3, "Channel '%s' unable to transfer\n", iaxs[fr->callno]->owner ? ast_channel_name(iaxs[fr->callno]->owner) : "<Unknown>");
memset(&iaxs[fr->callno]->transfer, 0, sizeof(iaxs[fr->callno]->transfer));
if (!iaxs[fr->callno]->bridgecallno) {
break;
}
if (iaxs[iaxs[fr->callno]->bridgecallno]->transferring) {
iaxs[iaxs[fr->callno]->bridgecallno]->transferring = TRANSFER_NONE;
send_command(iaxs[iaxs[fr->callno]->bridgecallno], AST_FRAME_IAX, IAX_COMMAND_TXREJ, 0, NULL, 0, -1);
}
ast_mutex_unlock(&iaxsl[iaxs[fr->callno]->bridgecallno]);
break;
case IAX_COMMAND_TXREADY:
if (iaxs[fr->callno]->bridgecallno) {