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Ensure the session ID can't be 0.

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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@104704 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Tilghman Lesher
2008-02-27 18:15:10 +00:00
parent 451ee5b1d4
commit 11550c7be6
1 changed files with 6 additions and 1 deletions
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7
main/manager.c
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@@ -2660,7 +2660,12 @@ static char *generic_http_callback(int format, struct sockaddr_in *requestor, co
ast_mutex_init(&s->__lock);
ast_mutex_lock(&s->__lock);
s->inuse = 1;
s->managerid = rand() ^ (unsigned long) s;
/*!\note There is approximately a 1 in 1.8E19 chance that the following
* calculation will produce 0, which is an invalid ID, but due to the
* properties of the rand() function (and the constantcy of s), that
* won't happen twice in a row.
*/
while ((s->managerid = rand() ^ (unsigned long) s) == 0);
AST_LIST_LOCK(&sessions);
AST_LIST_INSERT_HEAD(&sessions, s, list);
/* Hook into the last spot in the event queue */