[Asterisk-Users] Using a DNS name for externip in sip.conf

[Ian Hailey]

Hello Dennis,

I also wanted to know this and from having a quick look at the 
chan_sip.c I can see that the name is resolved only at startup when the 
sip.conf is read.

        } else if (!strcasecmp(v->name, "externip")) {
            if (!(hp = ast_gethostbyname(v->value, &ahp)))
                ast_log(LOG_WARNING, "Invalid address for externip 
keyword: %s\n", v->value);
            else
                memcpy(&externip.sin_addr, hp->h_addr, 
sizeof(externip.sin_addr));

I will modify my chan_sip.c to re-resolve the name every time a 
registration timeout occurs (defined by defaultexpirey). It would be 
nice if they could add it to the normal release. If this works then I 
will post the code changes somewhere (don't know how to do that yet).

Ian Hailey.

Dennis Cartier wrote:

>Does anyone know if the 'externip=' in sip.conf is resolved just once
>at startup or on an on going basis? I would like to use a DNS name
>through one of the dynamic DNS providers, but if the DNS updates, and
>asterisk continues using the old resolved value, this could get
>tricky.
>
>Thanks,
>
>Dennis
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