From hugh.waite@acision.com Thu May  1 19:54:55 2014
From: "Waite, Hugh" <hugh.waite@acision.com>
To: sr-dev@lists.kamailio.org
Subject: [sr-dev] Forcing TCP connection reuse doesn't use the failure_route
 when the connection has gone.
Date: Thu, 01 May 2014 19:54:15 +0200
Message-ID:
 <A125E59206A9104F81AB3874E34FEF792B520BC3B4@cz-nag-mbx01.intinfra.com>
MIME-Version: 1.0
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I have an edge-proxy which accepts TCP connections from clients. When I know =
that the clients are behind NATs (for example), I use the set_forward_no_conn=
ect() function to force connection reuse and avoid timeouts. In the case wher=
e the connection has already gone, the system sends a "477 Unfortunately erro=
r on sending to next hop occurred (477/TM)" response back to the registrar.
These connections are using outbound, so I would like to convert this into a =
"430 Flow Failed" response to the registrar, but the 477 response doesn't see=
m to trigger the onreply_route or failure_route.
Is there a way of trapping and handling this failure? If not, do we need more=
 flexibility in handling this particular tcp_send error (or other similar one=
s)? Other systems may wish to try additional destinations from the failure ro=
ute.
Snippets of my cfg and logs are below. The con_reuse flag is checked in tcp_s=
end at tcp_main.c:1846

Regards,
Hugh

route[RELAY] {
xlog("L_INFO", "$rm: route[RELAY]\n");
                loose_route();
                $var(lr_ret) =3D $rc;
                if ($var(lr_ret) =3D=3D 2) {
                        xlog("L_INFO", "$rm:  loose route with outbound\n");
                        t_on_failure("FAIL_OUTBOUND");
                        set_forward_no_connect();
                        if (t_relay() < 0) {
                                xlog("L_WARN", "$rm:  loose route with outbou=
nd failed\n");
                                sl_send_reply("500", "Something bad happened"=
);
                        }
                        exit;
                }
                . . .
}

May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: Routing logic st=
arts here
May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: route[REQINIT]
May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: route[INITIAL_RE=
QUEST]
May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: route[RECORD_ROU=
TE]
May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: route[RELAY]
May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE:  loose route wit=
h outbound
May  1 17:01:08 kamailio-cep[28226]: ERROR: tm [../../forward.h:219]: msg_sen=
d(): msg_send: ERROR: tcp_send failed
May  1 17:01:08 kamailio-cep[28226]: ERROR: tm [t_fwd.c:1609]: t_send_branch(=
): ERROR: t_send_branch: sending request on branch 0 failed
May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: ACK: Routing logic start=
s here
May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: ACK: route[REQINIT]

________________________________
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--===============1281783772==--


From miconda@gmail.com Mon May  5 18:18:19 2014
From: Daniel-Constantin Mierla <miconda@gmail.com>
To: sr-dev@lists.kamailio.org
Subject: Re: [sr-dev] Forcing TCP connection reuse doesn't use the
 failure_route when the connection has gone.
Date: Mon, 05 May 2014 18:18:11 +0200
Message-ID: <5367B9C3.8030602@gmail.com>
In-Reply-To:
 <A125E59206A9104F81AB3874E34FEF792B520BC3B4@cz-nag-mbx01.intinfra.com>
MIME-Version: 1.0
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--===============1257421552==
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Hello,

there are two ways:

- handle the response code for t_relay() together with setting the flag 
for not sending responses internally
- set 
http://kamailio.org/docs/modules/stable/modules/tm.html#tm.p.failure_exec_mode

Cheers,
Daniel

On 01/05/14 19:54, Waite, Hugh wrote:
>
> I have an edge-proxy which accepts TCP connections from clients. When 
> I know that the clients are behind NATs (for example), I use the 
> set_forward_no_connect() function to force connection reuse and avoid 
> timeouts. In the case where the connection has already gone, the 
> system sends a “477 Unfortunately error on sending to next hop 
> occurred (477/TM)” response back to the registrar.
>
> These connections are using outbound, so I would like to convert this 
> into a “430 Flow Failed” response to the registrar, but the 477 
> response doesn’t seem to trigger the onreply_route or failure_route.
>
> Is there a way of trapping and handling this failure? If not, do we 
> need more flexibility in handling this particular tcp_send error (or 
> other similar ones)? Other systems may wish to try additional 
> destinations from the failure route.
>
> Snippets of my cfg and logs are below. The con_reuse flag is checked 
> in tcp_send at tcp_main.c:1846
>
> Regards,
>
> Hugh
>
> route[RELAY] {
>
> xlog("L_INFO", "$rm: route[RELAY]\n");
>
>                 loose_route();
>
>                 $var(lr_ret) = $rc;
>
>                 if ($var(lr_ret) == 2) {
>
>                         xlog("L_INFO", "$rm:  loose route with 
> outbound\n");
>
> t_on_failure("FAIL_OUTBOUND");
>
> set_forward_no_connect();
>
>                         if (t_relay() < 0) {
>
>        xlog("L_WARN", "$rm:  loose route with outbound failed\n");
>
> sl_send_reply("500", "Something bad happened");
>
>                         }
>
>                         exit;
>
>                 }
>
>                 . . .
>
> }
>
> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: Routing 
> logic starts here
>
> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: 
> route[REQINIT]
>
> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: 
> route[INITIAL_REQUEST]
>
> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: 
> route[RECORD_ROUTE]
>
> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: route[RELAY]
>
> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE:  loose 
> route with outbound
>
> May  1 17:01:08 kamailio-cep[28226]: ERROR: tm [../../forward.h:219]: 
> msg_send(): msg_send: ERROR: tcp_send failed
>
> May  1 17:01:08 kamailio-cep[28226]: ERROR: tm [t_fwd.c:1609]: 
> t_send_branch(): ERROR: t_send_branch: sending request on branch 0 failed
>
> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: ACK: Routing 
> logic starts here
>
> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: ACK: route[REQINIT]
>
>
> ------------------------------------------------------------------------
> This e-mail and any attachment is for authorised use by the intended 
> recipient(s) only. It may contain proprietary material, confidential 
> information and/or be subject to legal privilege. It should not be 
> copied, disclosed to, retained or used by, any other party. If you are 
> not an intended recipient then please promptly delete this e-mail and 
> any attachment and all copies and inform the sender. Thank you for 
> understanding.
>
>
>
> _______________________________________________
> sr-dev mailing list
> sr-dev(a)lists.sip-router.org
> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev

-- 
Daniel-Constantin Mierla - http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda




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--===============1257421552==--


From oej@edvina.net Tue May  6 09:02:07 2014
From: "Olle E. Johansson" <oej@edvina.net>
To: sr-dev@lists.kamailio.org
Subject: Re: [sr-dev] Forcing TCP connection reuse doesn't use the
	failure_route when the connection has gone.
Date: Tue, 06 May 2014 09:02:05 +0200
Message-ID: <0B9657AC-66B4-4558-885E-13BBF806AD60@edvina.net>
In-Reply-To: <5367B9C3.8030602@gmail.com>
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="===============1211825128=="

--===============1211825128==
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: quoted-printable


On 05 May 2014, at 18:18, Daniel-Constantin Mierla <miconda(a)gmail.com> wrot=
e:

> Hello,
>=20
> there are two ways:
>=20
> - handle the response code for t_relay() together with setting the flag for=
 not sending responses internally
t_relay() doesn't seem to accept any flags. Can you please expand on this opt=
ion, since I'm missing
something important here.


[...]

>> If not, do we need more flexibility in handling this particular tcp_send e=
rror (or other similar ones)? Other systems may wish to try additional destin=
ations from the failure route.
We need to discuss how to manage persistent connections in a better way. This=
 applies both to TCP and TCP+TLS.

/O


>> Snippets of my cfg and logs are below. The con_reuse flag is checked in tc=
p_send at tcp_main.c:1846
>> =20
>> Regards,
>> Hugh
>> =20
>> route[RELAY] {
>> xlog("L_INFO", "$rm: route[RELAY]\n");
>>                 loose_route();
>>                 $var(lr_ret) =3D $rc;
>>                 if ($var(lr_ret) =3D=3D 2) {
>>                         xlog("L_INFO", "$rm:  loose route with outbound\n"=
);
>>                         t_on_failure("FAIL_OUTBOUND");
>>                         set_forward_no_connect();
>>                         if (t_relay() < 0) {
>>                                 xlog("L_WARN", "$rm:  loose route with out=
bound failed\n");
>>                                 sl_send_reply("500", "Something bad happen=
ed");
>>                         }
>>                         exit;
>>                 }
>>                 . . .
>> }
>> =20
>> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: Routing logic=
 starts here
>> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: route[REQINIT]
>> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: route[INITIAL=
_REQUEST]
>> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: route[RECORD_=
ROUTE]
>> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: route[RELAY]
>> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE:  loose route =
with outbound
>> May  1 17:01:08 kamailio-cep[28226]: ERROR: tm [../../forward.h:219]: msg_=
send(): msg_send: ERROR: tcp_send failed
>> May  1 17:01:08 kamailio-cep[28226]: ERROR: tm [t_fwd.c:1609]: t_send_bran=
ch(): ERROR: t_send_branch: sending request on branch 0 failed
>> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: ACK: Routing logic st=
arts here
>> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: ACK: route[REQINIT]
>>=20
>> This e-mail and any attachment is for authorised use by the intended recip=
ient(s) only. It may contain proprietary material, confidential information a=
nd/or be subject to legal privilege. It should not be copied, disclosed to, r=
etained or used by, any other party. If you are not an intended recipient the=
n please promptly delete this e-mail and any attachment and all copies and in=
form the sender. Thank you for understanding.
>>=20
>>=20
>>=20
>> _______________________________________________
>> sr-dev mailing list
>> sr-dev(a)lists.sip-router.org
>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev
>=20
> --=20
> Daniel-Constantin Mierla - http://www.asipto.com
> http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
> _______________________________________________
> sr-dev mailing list
> sr-dev(a)lists.sip-router.org
> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev




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--===============1211825128==--


From miconda@gmail.com Tue May  6 10:17:09 2014
From: Daniel-Constantin Mierla <miconda@gmail.com>
To: sr-dev@lists.kamailio.org
Subject: Re: [sr-dev] Forcing TCP connection reuse doesn't use the
 failure_route when the connection has gone.
Date: Tue, 06 May 2014 10:17:01 +0200
Message-ID: <53689A7D.6040907@gmail.com>
In-Reply-To: <0B9657AC-66B4-4558-885E-13BBF806AD60@edvina.net>
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="===============0989676690=="

--===============0989676690==
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit


On 06/05/14 09:02, Olle E. Johansson wrote:
>
> On 05 May 2014, at 18:18, Daniel-Constantin Mierla <miconda(a)gmail.com 
> <mailto:miconda(a)gmail.com>> wrote:
>
>> Hello,
>>
>> there are two ways:
>>
>> - handle the response code for t_relay() together with setting the 
>> flag for not sending responses internally
> t_relay() doesn't seem to accept any flags. Can you please expand on 
> this option, since I'm missing
> something important here.

t_relay_to() has the flags:
- http://kamailio.org/docs/modules/stable/modules/tm.html#tm.f.t_relay_to

Cheers,
Daniel

>
>
> [...]
>
>>> If not, do we need more flexibility in handling this particular 
>>> tcp_send error (or other similar ones)? Other systems may wish to 
>>> try additional destinations from the failure route.
> We need to discuss how to manage persistent connections in a better 
> way. This applies both to TCP and TCP+TLS.
>
> /O
>
>
>>> Snippets of my cfg and logs are below. The con_reuse flag is checked 
>>> in tcp_send at tcp_main.c:1846
>>> Regards,
>>> Hugh
>>> route[RELAY] {
>>> xlog("L_INFO", "$rm: route[RELAY]\n");
>>> loose_route();
>>> $var(lr_ret) = $rc;
>>> if ($var(lr_ret) == 2) {
>>> xlog("L_INFO", "$rm:  loose route with outbound\n");
>>> t_on_failure("FAIL_OUTBOUND");
>>> set_forward_no_connect();
>>> if (t_relay() < 0) {
>>>        xlog("L_WARN", "$rm:  loose route with outbound failed\n");
>>> sl_send_reply("500", "Something bad happened");
>>> }
>>> exit;
>>> }
>>> . . .
>>> }
>>> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: Routing 
>>> logic starts here
>>> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: 
>>> route[REQINIT]
>>> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: 
>>> route[INITIAL_REQUEST]
>>> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: 
>>> route[RECORD_ROUTE]
>>> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: 
>>> route[RELAY]
>>> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: INVITE: loose 
>>> route with outbound
>>> May  1 17:01:08 kamailio-cep[28226]: ERROR: tm 
>>> [../../forward.h:219]: msg_send(): msg_send: ERROR: tcp_send failed
>>> May  1 17:01:08 kamailio-cep[28226]: ERROR: tm [t_fwd.c:1609]: 
>>> t_send_branch(): ERROR: t_send_branch: sending request on branch 0 
>>> failed
>>> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: ACK: Routing 
>>> logic starts here
>>> May  1 17:01:08 kamailio-cep[28226]: INFO: <script>: ACK: route[REQINIT]
>>>
>>> ------------------------------------------------------------------------
>>> This e-mail and any attachment is for authorised use by the intended 
>>> recipient(s) only. It may contain proprietary material, confidential 
>>> information and/or be subject to legal privilege. It should not be 
>>> copied, disclosed to, retained or used by, any other party. If you 
>>> are not an intended recipient then please promptly delete this 
>>> e-mail and any attachment and all copies and inform the sender. 
>>> Thank you for understanding.
>>>
>>>
>>>
>>> _______________________________________________
>>> sr-dev mailing list
>>> sr-dev(a)lists.sip-router.org
>>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev
>>
>> -- 
>> Daniel-Constantin Mierla -http://www.asipto.com
>> http://twitter.com/#!/miconda  -http://www.linkedin.com/in/miconda
>> _______________________________________________
>> sr-dev mailing list
>> sr-dev(a)lists.sip-router.org <mailto:sr-dev(a)lists.sip-router.org>
>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev
>

-- 
Daniel-Constantin Mierla - http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda




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--===============0989676690==--


From oej@edvina.net Tue May  6 10:20:22 2014
From: "Olle E. Johansson" <oej@edvina.net>
To: sr-dev@lists.kamailio.org
Subject: Re: [sr-dev] Forcing TCP connection reuse doesn't use the
	failure_route when the connection has gone.
Date: Tue, 06 May 2014 10:20:21 +0200
Message-ID: <7CE7A552-17A4-4DCE-BF10-9DDD0E17DBF4@edvina.net>
In-Reply-To: <53689A7D.6040907@gmail.com>
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="===============1851460403=="

--===============1851460403==
Content-Type: text/plain; charset="utf-8"
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On 06 May 2014, at 10:17, Daniel-Constantin Mierla <miconda(a)gmail.com> wrot=
e:

>=20
> On 06/05/14 09:02, Olle E. Johansson wrote:
>>=20
>> On 05 May 2014, at 18:18, Daniel-Constantin Mierla <miconda(a)gmail.com> w=
rote:
>>=20
>>> Hello,
>>>=20
>>> there are two ways:
>>>=20
>>> - handle the response code for t_relay() together with setting the flag f=
or not sending responses internally
>> t_relay() doesn't seem to accept any flags. Can you please expand on this =
option, since I'm missing
>> something important here.
>=20
> t_relay_to() has the flags:
> - http://kamailio.org/docs/modules/stable/modules/tm.html#tm.f.t_relay_to

And the documentation is missing the return codes...=20

Thanks!
/O




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