From denys.pozniak@gmail.com Thu Dec  8 10:28:39 2022
From: Denys Pozniak <denys.pozniak@gmail.com>
To: sr-users@lists.kamailio.org
Subject: [SR-Users] Outgoing SIP/TLS connection error (msg_send_buffer():
 tcp_send failed)
Date: Thu, 08 Dec 2022 11:28:07 +0200
Message-ID:
 <CA+x3AxqiVkgOQ=uSFezHicUOjco4GLba4-x6aFejJ5yUVcyPOQ@mail.gmail.com>
MIME-Version: 1.0
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Hello!

We use trunk with Twilio through a SIP/TLS.
They establish incoming calls from random ports, like:
(Twilio)3.3.3.3:54321 --> (Kamailio)2.2.2.2:5061

In case of sending in-dialog requests to them, Kamailio should establish an
outgoing connection to the dst port 5061 (as per Route), like:
(Kamailio)2.2.2.2 --> (Twilio)3.3.3.3:5061

But as per tcpdump traces and logs, Kamailio does not even try to establish
an outgoing connection to Twilio.
There should be no problems with routes and the network on that server, as
regular telnet to Twilio shows that 5061 is open.

What could be the reason and how to debug?

*Script:*
onsend_route {
        xlog("L_ERR","[$cfg(route)]*RELAY ONSEND* $rm / $du / $fs / $fsn /
[$ci]\n");
}

*Syslog:*
DEBUG <core> [core/resolve.c:1259]: srv_sip_resolvehost(): 3.3.3.3:5061
proto=3
DEBUG <core> [core/resolve.c:1371]: srv_sip_resolvehost(): returning
0x55acd63a63c0 (3.3.3.3:5061 proto=3)
ERROR <script>: [DEFAULT_SEND]*RELAY ONSEND* REFER /
sip:3.3.3.3:5061;transport=tls
/ tls:10.1.1.1:5061 / sip_wan_tls / [123]
DEBUG tm [../../core/forward.h:277]: msg_send_buffer(): sending to:
3.3.3.3:5061, force_socket=4, send_sock=0x7f090049b8e8
DEBUG tm [../../core/forward.h:292]: msg_send_buffer(): tcp_send failed
DEBUG tm [t_fwd.c:1568]: t_send_branch(): send to 3.3.3.3:5061 (3) failed
WARNING: tm [t_fwd.c:1588]: t_send_branch(): sending request on branch 0
failed
DEBUG tm [t_funcs.c:335]: t_relay_to(): t_forward_nonack returned error -1
(-477)
DEBUG tm [t_funcs.c:353]: t_relay_to(): -477 error reply generation delayed
DEBUG sl [sl_funcs.c:558]: sl_run_callbacks(): execute callback for event
type 1

*Software:*
- Kamailio is listening on (+udp, +tcp):
  tls: 10.1.1.1:5061 name sip_wan_tls advertise 2.2.2.2:5061

- OS is Debian 11.5

- # kamailio -v
 version: kamailio 5.6.2 (x86_64/linux)
 flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS,
DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC,
F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT,
USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLOCKLIST,
HAVE_RESOLV_RES,  TLS_PTHREAD_MUTEX_SHARED
ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024,
BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
 id: unknown
compiled with gcc 10.2.1

- # dpkg -l | grep ssl
 ii  libssl1.1:amd64                     1.1.1n-0+deb11u3
amd64        Secure Sockets Layer toolkit - shared libraries
 ii  openssl                             1.1.1n-0+deb11u3
amd64        Secure Sockets Layer toolkit - cryptographic utility


-- 

BR,
Denys Pozniak



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From miconda@gmail.com Thu Dec  8 11:23:30 2022
From: Daniel-Constantin Mierla <miconda@gmail.com>
To: sr-users@lists.kamailio.org
Subject: Re: [SR-Users] Outgoing SIP/TLS connection error (msg_send_buffer():
 tcp_send failed)
Date: Thu, 08 Dec 2022 11:23:26 +0100
Message-ID: <c432a3d9-0df1-9895-9008-9107d6d1b952@gmail.com>
In-Reply-To:
 <CA+x3AxqiVkgOQ=uSFezHicUOjco4GLba4-x6aFejJ5yUVcyPOQ@mail.gmail.com>
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Hello,

check to see if the set_forward_no_connect() is used.

Cheers,
Daniel

On 08.12.22 10:28, Denys Pozniak wrote:
> Hello!
>
> We use trunk with Twilio through a SIP/TLS.
> They establish incoming calls from random ports, like:
> (Twilio)3.3.3.3:54321 <http://3.3.3.3:54321> -->
> (Kamailio)2.2.2.2:5061 <http://2.2.2.2:5061>
>
> In case of sending in-dialog requests to them, Kamailio should
> establish an outgoing connection to the dst port 5061 (as per Route),
> like:
> (Kamailio)2.2.2.2 --> (Twilio)3.3.3.3:5061 <http://3.3.3.3:5061>
>
> But as per tcpdump traces and logs, Kamailio does not even try to
> establish an outgoing connection to Twilio.
> There should be no problems with routes and the network on that
> server, as regular telnet to Twilio shows that 5061 is open.
>
> What could be the reason and=C2=A0how to debug?
>
> _Script:_
> onsend_route {
> =C2=A0 =C2=A0 =C2=A0 =C2=A0 xlog("L_ERR","[$cfg(route)]*RELAY ONSEND* $rm /=
 $du / $fs /
> $fsn / [$ci]\n");
> }
>
> _Syslog:_
> DEBUG <core> [core/resolve.c:1259]: srv_sip_resolvehost():
> 3.3.3.3:5061 <http://3.3.3.3:5061> proto=3D3
> DEBUG <core> [core/resolve.c:1371]: srv_sip_resolvehost(): returning
> 0x55acd63a63c0 (3.3.3.3:5061 <http://3.3.3.3:5061> proto=3D3)
> ERROR <script>: [DEFAULT_SEND]*RELAY ONSEND* REFER /
> sip:3.3.3.3:5061;transport=3Dtls / tls:10.1.1.1:5061
> <http://10.1.1.1:5061> / sip_wan_tls / [123]
> DEBUG tm [../../core/forward.h:277]: msg_send_buffer(): sending to:
> 3.3.3.3:5061 <http://3.3.3.3:5061>, force_socket=3D4,
> send_sock=3D0x7f090049b8e8
> DEBUG tm [../../core/forward.h:292]: msg_send_buffer(): tcp_send failed
> DEBUG tm [t_fwd.c:1568]: t_send_branch(): send to 3.3.3.3:5061
> <http://3.3.3.3:5061> (3) failed
> WARNING: tm [t_fwd.c:1588]: t_send_branch(): sending request on branch
> 0 failed
> DEBUG tm [t_funcs.c:335]: t_relay_to(): t_forward_nonack returned
> error -1 (-477)
> DEBUG tm [t_funcs.c:353]: t_relay_to(): -477 error reply generation
> delayed
> DEBUG sl [sl_funcs.c:558]: sl_run_callbacks(): execute callback for
> event type 1
>
> _Software:_
> - Kamailio is listening on (+udp, +tcp):
> =C2=A0 tls: 10.1.1.1:5061 <http://10.1.1.1:5061> name sip_wan_tls advertise
> 2.2.2.2:5061 <http://2.2.2.2:5061>
>
> - OS is Debian 11.5
>
> - # kamailio -v
> =C2=A0version: kamailio 5.6.2 (x86_64/linux)
> =C2=A0flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS,
> DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC,
> F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX,
> FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR,
> USE_DST_BLOCKLIST, HAVE_RESOLV_RES,=C2=A0 TLS_PTHREAD_MUTEX_SHARED
> ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE
> 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB=C2=A0
> poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
> =C2=A0id: unknown
> compiled with gcc 10.2.1
>
> - # dpkg -l | grep ssl
> =C2=A0ii =C2=A0libssl1.1:amd64 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 1.1.1n-0+deb11u3 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0
> =C2=A0 amd64 =C2=A0 =C2=A0 =C2=A0 =C2=A0Secure Sockets Layer toolkit - shar=
ed libraries
> =C2=A0ii =C2=A0openssl =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 1.1.1n-0+deb11u3 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0
> =C2=A0 amd64 =C2=A0 =C2=A0 =C2=A0 =C2=A0Secure Sockets Layer toolkit - cryp=
tographic utility
>
>
> --=20
>
> BR,
> Denys Pozniak
>
>
>
> __________________________________________________________
> Kamailio - Users Mailing List - Non Commercial Discussions
> sr-users(a)lists.kamailio.org
> Important: keep the mailing list in the recipients, do not reply only to th=
e sender!
> Edit mailing list options or unsubscribe:
> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

--=20
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda



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From denys.pozniak@gmail.com Thu Dec  8 11:34:22 2022
From: Denys Pozniak <denys.pozniak@gmail.com>
To: sr-users@lists.kamailio.org
Subject: Re: [SR-Users] Outgoing SIP/TLS connection error (msg_send_buffer():
 tcp_send failed)
Date: Thu, 08 Dec 2022 12:33:52 +0200
Message-ID:
 <CA+x3Axq2mFT4XmF8_XiC7KHxtA+29erUQsCHHBLoWrAC9zqw-w@mail.gmail.com>
In-Reply-To: <c432a3d9-0df1-9895-9008-9107d6d1b952@gmail.com>
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="===============1459070214=="

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Thanks!!!
Yeah, *set_forward_no_connect()* was in the script ...

=D1=87=D1=82, 8 =D0=B4=D0=B5=D0=BA. 2022 =D0=B3. =D0=B2 12:23, Daniel-Constan=
tin Mierla <miconda(a)gmail.com>:

> Hello,
>
> check to see if the set_forward_no_connect() is used.
>
> Cheers,
> Daniel
> On 08.12.22 10:28, Denys Pozniak wrote:
>
> Hello!
>
> We use trunk with Twilio through a SIP/TLS.
> They establish incoming calls from random ports, like:
> (Twilio)3.3.3.3:54321 --> (Kamailio)2.2.2.2:5061
>
> In case of sending in-dialog requests to them, Kamailio should establish
> an outgoing connection to the dst port 5061 (as per Route), like:
> (Kamailio)2.2.2.2 --> (Twilio)3.3.3.3:5061
>
> But as per tcpdump traces and logs, Kamailio does not even try to
> establish an outgoing connection to Twilio.
> There should be no problems with routes and the network on that server, as
> regular telnet to Twilio shows that 5061 is open.
>
> What could be the reason and how to debug?
>
> *Script:*
> onsend_route {
>         xlog("L_ERR","[$cfg(route)]*RELAY ONSEND* $rm / $du / $fs / $fsn /
> [$ci]\n");
> }
>
> *Syslog:*
> DEBUG <core> [core/resolve.c:1259]: srv_sip_resolvehost(): 3.3.3.3:5061
> proto=3D3
> DEBUG <core> [core/resolve.c:1371]: srv_sip_resolvehost(): returning
> 0x55acd63a63c0 (3.3.3.3:5061 proto=3D3)
> ERROR <script>: [DEFAULT_SEND]*RELAY ONSEND* REFER /
> sip:3.3.3.3:5061;transport=3Dtls / tls:10.1.1.1:5061 / sip_wan_tls / [123]
> DEBUG tm [../../core/forward.h:277]: msg_send_buffer(): sending to:
> 3.3.3.3:5061, force_socket=3D4, send_sock=3D0x7f090049b8e8
> DEBUG tm [../../core/forward.h:292]: msg_send_buffer(): tcp_send failed
> DEBUG tm [t_fwd.c:1568]: t_send_branch(): send to 3.3.3.3:5061 (3) failed
> WARNING: tm [t_fwd.c:1588]: t_send_branch(): sending request on branch 0
> failed
> DEBUG tm [t_funcs.c:335]: t_relay_to(): t_forward_nonack returned error -1
> (-477)
> DEBUG tm [t_funcs.c:353]: t_relay_to(): -477 error reply generation delayed
> DEBUG sl [sl_funcs.c:558]: sl_run_callbacks(): execute callback for event
> type 1
>
> *Software:*
> - Kamailio is listening on (+udp, +tcp):
>   tls: 10.1.1.1:5061 name sip_wan_tls advertise 2.2.2.2:5061
>
> - OS is Debian 11.5
>
> - # kamailio -v
>  version: kamailio 5.6.2 (x86_64/linux)
>  flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS,
> DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC,
> F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT,
> USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLOCKLIST,
> HAVE_RESOLV_RES,  TLS_PTHREAD_MUTEX_SHARED
> ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024,
> BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
> poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
>  id: unknown
> compiled with gcc 10.2.1
>
> - # dpkg -l | grep ssl
>  ii  libssl1.1:amd64                     1.1.1n-0+deb11u3
> amd64        Secure Sockets Layer toolkit - shared libraries
>  ii  openssl                             1.1.1n-0+deb11u3
> amd64        Secure Sockets Layer toolkit - cryptographic utility
>
>
> --
>
> BR,
> Denys Pozniak
>
>
>
> __________________________________________________________
> Kamailio - Users Mailing List - Non Commercial Discussionssr-users(a)lists.=
kamailio.org
> Important: keep the mailing list in the recipients, do not reply only to th=
e sender!
> Edit mailing list options or unsubscribe:https://lists.kamailio.org/cgi-bin=
/mailman/listinfo/sr-users
>
> --
> Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- www.li=
nkedin.com/in/miconda
>
> __________________________________________________________
> Kamailio - Users Mailing List - Non Commercial Discussions
> sr-users(a)lists.kamailio.org
> Important: keep the mailing list in the recipients, do not reply only to
> the sender!
> Edit mailing list options or unsubscribe:
> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>


--=20

BR,
Denys Pozniak



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--===============1459070214==--