[PATCH 4/4] resolv: fix rotate option

[Andreas Schwab]

Siddhesh Poyarekar <siddhesh@redhat.com> writes:

> On Fri, Jun 13, 2014 at 05:32:13PM +0200, Aurelien Jarno wrote:
>> The rotate option doesn't work correctly, and only send the query to the
>> same server (the second in the list). The rotation code in itself is not
>> broken, but the nsaddrs structure is reinitialized each time at the
>> beginning of __libc_res_nsend unless RES_STAYOPEN is enabled.
>> 
>> This is due to a call to __res_iclose from the end of __libc_res_nsend
>> when answers from the name server have been received. This function
>> closes all the sockets, but doesn't free the addresses (it can do that,
>> but in that case the second argument is false).
>> 
>> This patch change the code of __res_iclose to clear
>> statp->_u._ext.nsinit only when the addresses are actually freed.
>> 
>> 2014-06-13  Aurelien Jarno  <aurelien@aurel32.net>
>> 
>> 	* resolv/res_init.c (__res_iclose): Only clear nsinit if the
>> 	addresses have been freed.
>
> Looks good to me

This is broken.  It means that __libc_res_nsend no longer reinitializes
its cached copy of the name servers.

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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