[Serusers] Fw: turning 30x blind forward to INVITE

[Marian Dumitru]

errata: t_reply() replaced with t_relay();

Best regards
Marian

Marian Dumitru wrote:
> Hi Antanas,
> 
> have you added a failure_route like this ? :
> 
> failure_route[x] {
>     if (t_check_status("3[0-9][0-9]")) {
>         log(1, "3xx reply received !\n");
>         get_redirects("*");
>         t_relay();
>     };
> }
> 
> Best regards,
> Marian
> 
> Antanas Masevicius wrote:
> 
>> Hello Marian,
>>
>> tried to use this module, but ser always forwarded 302 back to calling 
>> side.
>> Ser himself,  never generated INVITE instead of calling client. Does
>> uac_redirect module should really generate INVITE by replying to 302 
>> itself?
>> Now, it just forwards 302 message to calling client.
>>
>> Antanas
>>
>> ----- Original Message ----- From: "Marian Dumitru" 
>> <marian.dumitru at voice-sistem.ro>
>> To: "Antanas Masevicius" <admin at ntt.lt>
>> Sent: Friday, August 12, 2005 2:29 PM
>> Subject: Re: [Serusers] Fw: turning 30x blind forward to INVITE
>>
>>
>>
>>> Hi Antanas,
>>>
>>> you may try the uac_redirect module from the OpenSER - it will serve
>>> your purpose - see
>>> http://www.openser.org/docs/modules/0.10.x/uac_redirect.html
>>>
>>> Best regards,
>>> Marian
>>>
>>> Antanas Masevicius wrote:
>>>
>>>> Hello,
>>>>
>>>>
>>>> this topic was last discussed here:
>>>> http://lists.iptel.org/pipermail/serusers/2005-May/019551.html
>>>>
>>>> last few days i was trying to apply juha's move() function with almost
>>>> no success to 0.9.3 stable branch.
>>>>
>>>> i added such code to my ser.cfg:
>>>>
>>>> onreply_route[1] {
>>>>        xlog("L_NOTICE", "Reply status %rs: Reason %rr\n");
>>>>        if (t_check_status("30[12]")) {
>>>>                xlog("L_NOTICE", "We got a 30[12]!!!!!\n");
>>>>                t_move();  # custom function by juha
>>>>                #t_reply();
>>>>        };
>>>> }
>>>> and modified move() code like this:
>>>>
>>>> inline static int move(struct sip_msg* _m, char *_foo, char *_bar)
>>>> {
>>>>        //struct sip_msg* reply;
>>>>        regmatch_t pmatch[2];
>>>>        struct hdr_field hf;
>>>>        contact_t* first;
>>>>        regex_t contact_re;
>>>>
>>>>        // What is it? didn't find anywere.
>>>>        //reply = _m->final_reply;
>>>>        // MOD HERE
>>>>        if (!_m) {
>>>>                LOG(L_ERR, "move(): No reply found\n");
>>>>                return -1;
>>>>        }
>>>>
>>>>
>>>>        LOG(L_ERR, "move(): unparsed part of reply: %s\n",
>>
>>
>> _m->unparsed);
>>
>>>>        // FIXME: where to put this? initialisation?
>>>>        // MOD HERE
>>>>        regcomp(&contact_re, "^Contact:(.*)$",
>>
>>
>> REG_EXTENDED|REG_NEWLINE);
>>
>>>>        if ( ( regexec(&contact_re, _m->unparsed, 2, &(pmatch[0]), 0) !=
>>>> 0) || (pmatch[1].rm_so == -1)) {
>>>>                LOG(L_ERR, "move(): No Contact header found\n");
>>>>                return -1;
>>>>        }
>>>>
>>>>        hf.type = HDR_CONTACT;
>>>>        hf.name.len = 0;
>>>>        hf.body.len = pmatch[1].rm_eo - pmatch[1].rm_so - 1;
>>>>        hf.body.s = &(_m->unparsed[pmatch[1].rm_so]);
>>>>        hf.len = hf.body.len + 2;
>>>>        hf.parsed = NULL;
>>>>        hf.next = NULL;
>>>>
>>>>        // this prints out redirected contact
>>>>        LOG(L_ERR, "hf.body: '%.*s'\n", hf.body.len, hf.body.s);
>>>>
>>>>        if (parse_contact(&hf) < 0) {
>>>>                LOG(L_ERR, "move(): Error while parsing Contact\n");
>>>>                goto failure;
>>>>        }
>>>>
>>>>        if (((contact_body_t*)hf.parsed)->star == 1) {
>>>>                LOG(L_ERR, "move(): Contact is *\n");
>>>>                goto failure;
>>>>        }
>>>>        first = ((contact_body_t*)hf.parsed)->contacts;
>>>>        if (first) {
>>>>                // MOD HERE
>>>>                if (append_branch(_m, first->uri.s, first->uri.len, 0,
>>>> 0, Q_UNSPECIFIED) == 1) {
>>>>                        goto success;
>>>>                } else {
>>>>                        LOG(L_ERR, "move(): Appending branch failed\n");
>>>>                }
>>>>        } else {
>>>>                LOG(L_ERR, "move(): No contacts in Contact header\n");
>>>>        }
>>>>
>>>> failure:
>>>>        if (hf.parsed) {
>>>>                free_contact((contact_body_t**)(&(hf.parsed)));
>>>>        }
>>>>        return -1;
>>>>
>>>> success:
>>>>        free_contact((contact_body_t**)(&(hf.parsed)));
>>>>        return 1;
>>>> }
>>>>
>>>> it seems that t_move succeeds(), contact gets parsed and 
>>>> append_branch()
>>
>>
>>
>>>> gets execuded. But then, nothing happens. 302 is replied back to call
>>>> originator. It is function build_res_buf_from_sip_res is called() which
>>>> builds 302 message back to call originator..
>>>> It seems that after getting contact from 302 message, INVITE sould be
>>>> generatated somehow. I suspect that i am passing wrong message to
>>>> append_branch, but i didn't found how to access INVITE from tm module
>>>> while in onreply_route[].
>>>>
>>>> Can anybody with deeper ser knowledge help?
>>>>
>>>>
>>>> Antanas
>