[SR-Users-ES] Kamailio como SBC

Mie Abr 15 13:08:57 CEST 2020

Hola y bienvenido,

Aparentemente tienes que agregar un RR con un FQDN.

En la lista en inglés se ha hablado mucho de ese tema. Mira en los archives.

Un saludo

On Wed, 15 Apr 2020 at 10:23, sip user <sipuser404 en gmail.com> wrote:

> Hola buenos días... soy nuevo en esta lista y estaba empezzando a meterme
> con Kamailio, principalmente para configurarlo como SBC contra Teams, en
> este caso.
>
> Pero no consigo que me funcione. Si lanzo una llamadas desde el Teams, en
> el Kamailio veo:
>
> 1.- En syslog:
>
> Apr 15 11:11:41 vps793907 kamailio[23122]: 13(23167) DEBUG: <core>
> [ip_addr.c:243]: print_ip(): tcpconn_new: new tcp connection: 52.114.7.24
> Apr 15 11:11:41 vps793907 kamailio[23122]: 13(23167) DEBUG: <core>
> [tcp_main.c:1073]: tcpconn_new(): tcpconn_new: on port 4160, type 3
> Apr 15 11:11:41 vps793907 kamailio[23122]: 13(23167) DEBUG: <core>
> [tcp_main.c:1382]: tcpconn_add(): tcpconn_add: hashes: 171:1857:1187, 30
> Apr 15 11:11:41 vps793907 kamailio[23122]: 13(23167) DEBUG: <core>
> [io_wait.h:388]: io_watch_add(): DBG: io_watch_add(0xa1f240, 23, 2,
> 0x7f90f2438f80), fd_no=17
> Apr 15 11:11:41 vps793907 kamailio[23122]: 13(23167) DEBUG: <core>
> [io_wait.h:610]: io_watch_del(): DBG: io_watch_del (0xa1f240, 23, -1, 0x0)
> fd_no=18 called
> Apr 15 11:11:41 vps793907 kamailio[23122]: 13(23167) DEBUG: <core>
> [tcp_main.c:4219]: handle_tcpconn_ev(): tcp: DBG: sending to child, events 1
> Apr 15 11:11:41 vps793907 kamailio[23122]: 13(23167) DEBUG: <core>
> [tcp_main.c:3902]: send2child(): selected tcp worker 1 10(23159) for
> activity on [tls:SBC_IP:5061], 0x7f90f2438f80
> Apr 15 11:11:41 vps793907 kamailio[23122]: 10(23159) DEBUG: <core>
> [tcp_read.c:1507]: handle_io(): received n=8 con=0x7f90f2438f80, fd=9
> Apr 15 11:11:41 vps793907 kamailio[23122]: 10(23159) DEBUG: tls
> [tls_server.c:184]: tls_complete_init(): Using TLS domain TLSs<default>
> Apr 15 11:11:41 vps793907 kamailio[23122]: 10(23159) DEBUG: tls
> [tls_domain.c:700]: sr_ssl_ctx_info_callback(): SSL handshake started
> Apr 15 11:11:41 vps793907 kamailio[23122]: 10(23159) DEBUG: <core>
> [tcp_main.c:2516]: tcpconn_do_send(): tcp_send: sending...
> Apr 15 11:11:41 vps793907 kamailio[23122]: 10(23159) DEBUG: <core>
> [tcp_main.c:2550]: tcpconn_do_send(): tcp_send: after real write: c=
> 0x7f90f2438f80 n=1468 fd=9
> Apr 15 11:11:41 vps793907 kamailio[23122]: 10(23159) DEBUG: <core>
> [tcp_main.c:2551]: tcpconn_do_send(): tcp_send: buf=
> Apr 15 11:11:41 vps793907 kamailio[23122]: #026#003#003
> Apr 15 11:11:41 vps793907 kamailio[23122]: 10(23159) DEBUG: <core>
> [io_wait.h:388]: io_watch_add(): DBG: io_watch_add(0x9c1700, 9, 2,
> 0x7f90f2438f80), fd_no=1
> Apr 15 11:11:42 vps793907 kamailio[23122]: 10(23159) DEBUG: <core>
> [tcp_read.c:296]: tcp_read_data(): EOF on 0x7f90f2438f80, FD 9
> Apr 15 11:11:42 vps793907 kamailio[23122]: 10(23159) DEBUG: <core>
> [tcp_read.c:1291]: tcp_read_req(): tcp_read_req: EOF
> Apr 15 11:11:42 vps793907 kamailio[23122]: 10(23159) DEBUG: <core>
> [io_wait.h:610]: io_watch_del(): DBG: io_watch_del (0x9c1700, 9, -1, 0x10)
> fd_no=2 called
> Apr 15 11:11:42 vps793907 kamailio[23122]: 10(23159) DEBUG: <core>
> [tcp_read.c:1434]: release_tcpconn(): releasing con 0x7f90f2438f80, state
> -1, fd=9, id=30
> Apr 15 11:11:42 vps793907 kamailio[23122]: 10(23159) DEBUG: <core>
> [tcp_read.c:1435]: release_tcpconn():  extra_data 0x7f90f2432b40
> Apr 15 11:11:42 vps793907 kamailio[23122]: 13(23167) DEBUG: <core>
> [tcp_main.c:3331]: handle_tcp_child(): handle_tcp_child: reader response=
> 7f90f2438f80, -1 from 1
> Apr 15 11:11:42 vps793907 kamailio[23122]: 13(23167) DEBUG: tls
> [tls_server.c:604]: tls_h_close(): Closing SSL connection 0x7f90f2432b40
>
> 2.- Con un TCPDUMP:
>
> 11:13:09.311797 IP SBC_IP .1024 > SBC_IP .eu.sip-tls: Flags [S], seq
> 261244614, win 64240, options [mss 1440,nop,wscale 8,nop,nop,sackOK],
> length 0
> 11:13:09.311898 IP  SBC_IP .eu.sip-tls > 52.114.76.76.1024: Flags [S.],
> seq 812357247, ack 261244615, win 29200, options [mss
> 1460,nop,nop,sackOK,nop,wscale 7], length 0
> 11:13:09.340358 IP 52.114.76.76.1024 >  SBC_IP .eu.sip-tls: Flags [.], ack
> 1, win 2053, length 0
> 11:13:09.340560 IP 52.114.76.76.1024 > SBC_IP .eu.sip-tls: Flags [P.], seq
> 1:187, ack 1, win 2053, length 186
> 11:13:09.340578 IP SBC_IP .eu.sip-tls > 52.114.76.76.1024: Flags [.], ack
> 187, win 237, length 0
> 11:13:09.341361 IP SBC_IP .eu.sip-tls > 52.114.76.76.1024: Flags [P.], seq
> 1:1469, ack 187, win 237, length 1468
> 11:13:09.369606 IP 52.114.76.76.1024 > SBC_IP .eu.sip-tls: Flags [.], ack
> 1469, win 2053, length 0
> 11:13:12.451498 IP 52.114.7.24.1216 > SBC_IP .eu.sip-tls: Flags [S], seq
> 309084204, win 64240, options [mss 1440,nop,wscale 8,nop,nop,sackOK],
> length 0
> 11:13:12.451587 IP SBC_IP .eu.sip-tls > 52.114.7.24.1216: Flags [S.], seq
> 3275066862, ack 309084205, win 29200, options [mss
> 1460,nop,nop,sackOK,nop,wscale 7], length 0
> 11:13:12.707119 IP 52.114.7.24.1216 > SBC_IP .eu.sip-tls: Flags [.], ack
> 1, win 2053, length 0
> 11:13:12.707311 IP 52.114.7.24.1216 > SBC_IP .eu.sip-tls: Flags [P.], seq
> 1:187, ack 1, win 2053, length 186
> 11:13:12.707345 IP SBC_IP .eu.sip-tls > 52.114.7.24.1216: Flags [.], ack
> 187, win 237, length 0
> 11:13:12.708273 IP SBC_IP .eu.sip-tls > 52.114.7.24.1216: Flags [P.], seq
> 1:1469, ack 187, win 237, length 1468
> 11:13:12.965101 IP 52.114.7.24.1216 > SBC_IP .eu.sip-tls: Flags [.], ack
> 1469, win 2053, length 0
> 11:13:12.965156 IP 52.114.7.24.1216 > SBC_IP .eu.sip-tls: Flags [F.], seq
> 187, ack 1469, win 2053, length 0
> 11:13:12.965688 IP SBC_IP .eu.sip-tls > 52.114.7.24.1216: Flags [F.], seq
> 1469, ack 188, win 237, length 0
> 11:13:13.220871 IP 52.114.7.24.1216 > SBC_IP .eu.sip-tls: Flags [.], ack
> 1470, win 2053, length 0
>
> No consigo "recibir" nada.
>
> Tengo generados los certificados y configurados en el tls.cfg del Kamailio:
>
> [server:default]
> method = TLSv1.2
> verify_certificate = no
> require_certificate = no
> private_key = /etc/letsencrypt/ssl/cert.key
> certificate = /etc/letsencrypt/ssl/cert.crt
> ca_list = /etc/letsencrypt/ssl/ca.crt
>
> Dentro del propio Kamailio tengo configurado para que devuelva un 200
> KeepAlive al Teams cuando recibe un OPTIONS:
>
> event_route[tm:local-request] {
>
>         if(is_method("OPTIONS") && $ru =~ "pstnhub.microsoft.com") {
>                append_hf("Contact: <sip: SBC_DNS
> :5061;transport=tls>\r\n");
>         }
>         xlog("L_INFO", "Sent out tm request: $mb\n");
> }
>
> Y he midificado el record_route por este nuevo:
>
> record_route_preset(" SBC_DNS :5061;transport=tls", " SBC_IP :5061");
>
> He creado una dispatcher.list:
>
> # setid(integer) destination(sip uri) flags (integer, optional),
> priority(int,opt), attrs (str,optional)
> 1:1:sip:sip.pstnhub.microsoft.com;transport=tls 0 3 socket=tls: SBC_IP
> :5061;ping_from= sip:SBC_DNS
> 2:1:sip:sip2.pstnhub.microsoft.com;transport=tls 0 2 socket=tls: SBC_IP
> :5061;ping_from=sip: SBC_DNS
> 3:1:sip:sip3.pstnhub.microsoft.com;transport=tls 0 1 socket=tls: SBC_IP
> :5061;ping_from=sip: SBC_DNS
> 4:1:sip:sip-all.pstnhub.microsoft.com;transport=tls 0 1 socket=tls:
> SBC_IP :5061;ping_from=sip: SBC_DNS
>
> Creo, que uno de los problemas es que no mando bien el OPTIONS hacia el
> Teams, ya que este en su panel, me indica que el SBC está INACTIVO.
>
> No se si podrías ayudarme a enderezar un poco esto....
>
> Muchas gracias por todo..
>
> Un saludo
> _______________________________________________
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> sr-users-es en lists.kamailio.org
> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users-es
>
-- 
Regards,

David Villasmil
email: david.villasmil.work en gmail.com
phone: +34669448337
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