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Merged revisions 104704 via svnmerge from

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https://origsvn.digium.com/svn/asterisk/branches/1.4

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r104704 | tilghman | 2008-02-27 12:15:10 -0600 (Wed, 27 Feb 2008) | 2 lines

Ensure the session ID can't be 0.

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@104705 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Tilghman Lesher
2008-02-27 18:20:35 +00:00
parent b21b5f5574
commit 133a18478c
1 changed files with 6 additions and 1 deletions
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7
main/manager.c
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@@ -3443,7 +3443,12 @@ static struct ast_str *generic_http_callback(enum output_format format,
ast_mutex_init(&s->__lock);
ast_mutex_lock(&s->__lock);
s->inuse = 1;
s->managerid = (rand() ^ (unsigned long) s) | 1; /* make sure it is non-zero */
/*!\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);
s->last_ev = grab_last();
AST_LIST_LOCK(&sessions);
AST_LIST_INSERT_HEAD(&sessions, s, list);