[asterisk-bugs] [Asterisk 0015540]: [patch] chan_sip behaves like crazy if there is not route to destination

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=15540 
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Reported By:                nmav
Assigned To:                
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Project:                    Asterisk
Issue ID:                   15540
Category:                   Channels/chan_sip/Registration
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
Asterisk Version:           1.4.25.1 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2009-07-21 03:55 CDT
Last Modified:              2009-09-04 02:03 CDT
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Summary:                    [patch] chan_sip behaves like crazy if there is not
route to destination
Description: 
If the host asterisk is running has no routes to the registration server I
get continuous messages like below. In addition after ten minutes the
machine crashes due to no memory available (asterisk takes it all).

[Apr  1 04:10:39] WARNING[916]: chan_sip.c:1804 __sip_xmit: sip_xmit of
0x15cb44
 (len 403) to 192.168.240.34:5060 returned -2: Unknown error 101
[Apr  1 04:10:39] NOTICE[916]: chan_sip.c:8144 sip_reg_timeout:    --
Registrati
on for 'nmav2 at 192.168.240.34' timed out, trying again (Attempt
https://issues.asterisk.org/view.php?id=622)
[Apr  1 04:10:39] WARNING[916]: acl.c:548 ast_ouraddrfor: Cannot connect
REGISTER attempt 623 to nmav2 at 192.168.240.34
[Apr  1 04:10:39] WARNING[916]: chan_sip.c:1804 __sip_xmit: sip_xmit of
0x8f9f4c
 (len 403) to 192.168.240.34:5060 returned -2: Unknown error 101
[Apr  1 04:10:39] NOTICE[916]: chan_sip.c:8144 sip_reg_timeout:    --
Registrati
on for 'nmav1 at 192.168.240.34' timed out, trying again (Attempt
https://issues.asterisk.org/view.php?id=614)
[Apr  1 04:10:39] WARNING[916]: acl.c:548 ast_ouraddrfor: Cannot connect
REGISTER attempt 615 to nmav1 at 192.168.240.34


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---------------------------------------------------------------------- 
 (0110208) oej (manager) - 2009-09-04 02:03
 https://issues.asterisk.org/view.php?id=15540#c110208 
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On OS/X the man page of sendto only defines -1 as a return value
"RETURN VALUES
     Upon successful completion, the number of bytes which were sent is
returned.  Otherwise, -1 is returned and the global variable errno is set
to
     indicate the error.

On centos 5.2:
"RETURN VALUE
       On success, these calls return the number of characters sent.  On
error, -1 is returned, and errno is set appropriately."

On FreeBSD 7:
"RETURN VALUES
     The call returns the number of characters sent, or -1 if an error
     occurred."


So where does a -2 come from? 

Issue History 
Date Modified    Username       Field                    Change               
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2009-09-04 02:03 oej            Note Added: 0110208                          
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