Re: [Linphone-developers] incoming call, audio, behind NAT

[Simon Morlat]

Thanks for reporting this bug. I could see that while I was on vacation, 
Aymeric found it and wrote a patch very similar to yours. Normally this bug 
will be solved in next release.

Le Samedi 26 Mars 2005 18:55, Rick Sewill a écrit :
> With linphone 1.0.x (1.0.0 or 1.0.1),
> I can't seem to get audio for incoming calls.
>
> The way I test this is to go to www.freeworlddialup.com
> where I have an account,
> Select an option to "Call Me" listed in the Quick Start Guide.
>
> I am behind NAT.  The NAT device does not understand the SIP protocol.
>
> The ethernet sniff showed sdp_context_generate_template()
> in coreapi/sdphandler.c was putting in my local (192.168.x.x)
> IP address when sending the SIP/2.0 200 OK message.
>
> I tried the following patch.
> After this patch, I could hear the automated voice say,
> "Welcome to Freeworld Dialup...."
>
> I do not understand the code well enough to know if the following
> patch is correct, or if there is a better patch that should be done.
>
> ===== BEGIN PATCH to linphone 1.0.1 =====
> diff -Naur orig-linphone-1.0.1/coreapi/sdphandler.c
> linphone-1.0.1/coreapi/sdphandler.c
> --- orig-linphone-1.0.1/coreapi/sdphandler.c 2005-03-07
> 08:50:36.000000000 -0600
> +++ linphone-1.0.1/coreapi/sdphandler.c 2005-03-26 10:42:47.012711392
> -0600
> @@ -256,6 +256,19 @@
>    ctx->remote=remote;
>    tmp=sdp_message_o_addr_get(remote);
>    eXosip_get_localip_for(tmp,&ctx->localip);
> +
> +     if( eXosip_is_public_address(tmp))
> +     {
> +             char *firewall_address;
> +
> +             firewall_address = eXosip_get_firewallip();
> +                              if (firewall_address != NULL)
> +                                 {
> +                                             free(ctx->localip);
> +
> ctx->localip = osip_strdup(firewall_address);
> +            }
> +            }
> +
>       answer = sdp_context_generate_template (ctx);
>
>       /* for each m= line */
> diff -Naur orig-linphone-1.0.1/exosip/eXosip.c
> linphone-1.0.1/exosip/eXosip.c
> --- orig-linphone-1.0.1/exosip/eXosip.c       2005-02-22 11:30:10.000000000
> -0600
> +++ linphone-1.0.1/exosip/eXosip.c    2005-03-26 02:13:42.000000000
> -0600
> @@ -56,6 +56,15 @@
>
>  eXosip_t eXosip;
>
> +char *eXosip_get_firewallip(void)
> +{
> +     if (eXosip.j_firewall_ip[0]!='\0')
> +     {
> +             return eXosip.j_firewall_ip;
> +             }
> +             return NULL;
> +}
> +
>  void eXosip_set_firewallip(const char *firewall_address)
>  {
>       if (firewall_address==NULL) return;
> ===== END PATCH to linphone 1.0.1 =====