[asterisk-users] Using SIP with NAT (technical code question)

[Bob Chiodini]

It looks to me that if the test clause is false then 
ast_gethostbyname is called.  Presumably not needed when NAT is enabled.

Bob...

jezzzz . wrote:
> In chan_sip.c, line 5876 (Asterisk-1.2.13), the
> function parse_ok_contact returns whether the host
> that requested an invite is a valid or invalid host.
>
> In line 5925 the following clause is tested:
>
> if (!(ast_test_flag(pvt, SIP_NAT) & SIP_NAT_ROUTE))
>     hp = ast_gethostbyname(n, &ahp);
>
> If this clause is true then Asterisk will attempt to
> retrieve the IP address by using the hostname provided
> in the invite.
>
> My question is, is this test always going to be true
> if a user (who receives the invite) uses NAT? (this is
> set up in sip.conf as nat=yes) Is there a reason why
> this was set up only for NAT? 
>
> Thanks,
>
> Jez
>
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