[asterisk-dev] [Code Review] 3343: res_pjsip: Enable DNS support.

[Sean Bright]

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Ship it!


Ship It!

- Sean Bright


On March 17, 2014, 1:15 p.m., Joshua Colp wrote:
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> https://reviewboard.asterisk.org/r/3343/
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> (Updated March 17, 2014, 1:15 p.m.)
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> Review request for Asterisk Developers.
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> Bugs: ASTERISK-23435
>     https://issues.asterisk.org/jira/browse/ASTERISK-23435
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> Repository: Asterisk
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> Description
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> This change adds a configuration option for setting nameservers to be used by the PJSIP DNS client. If this option is not set then the system nameservers are retrieved and used instead.
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> This also allows the nameservers to be changed by doing a reload.
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> In case others are wondering as Olle was:
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> PJLIB-Util (part of pjproject) provides a DNS client which can optionally (but is highly suggested) to be used with PJSIP. It provides asynchronous DNS, SRV lookups, multiple record support, etc. Right now this isn't enabled so we are simply doing A/AAAA record lookups. The reason it's not enabled is that explicit nameservers *must* be provided to it when enabling it. It will not use the system ones by itself. The change up on reviewboard enables it by default using the system nameservers it finds, but with the ability to override or completely disable it if a user wants. The reason I also provide reload functionality is that people in #asterisk-dev expressed a concern that users may change nameservers but don't want to restart Asterisk, which is understandable. 
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> Diffs
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>   /branches/12/res/res_pjsip/include/res_pjsip_private.h 410470 
>   /branches/12/res/res_pjsip/config_system.c 410470 
>   /branches/12/res/res_pjsip/config_global.c 410470 
>   /branches/12/res/res_pjsip.c 410470 
>   /branches/12/main/dns.c 410470 
>   /branches/12/include/asterisk/dns.h 410470 
>   /branches/12/CHANGES 410470 
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> Diff: https://reviewboard.asterisk.org/r/3343/diff/
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> Testing
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> Explicitly set nameservers and confirmed they were used by PJSIP. Disabled it and confirmed that the DNS client was disabled. Set to auto (explicitly and by default) and confirmed that the system nameservers were used.
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> Thanks,
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> Joshua Colp
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