Hi Daniel.
After some try to configure kamailio 4.4.3 to act as SPI TLS client
for Cisco SIP TLS gateways I have found one issue.
If I do client configuration for tls
[client:10.1.23.19:5061]
verify_certificate = yes
ca_list = /etc/kamailio/CAs/ca1.pem
[client:10.1.23.29:5061]
verify_certificate = yes
ca_list = /etc/kamailio/CAs/ca2.pem
[client:default]
verify_certificate = no
require_certificate = no
Kamailo always do default profile selection (I do configuration
without server_name or server_id, with it kamailio works fine but
there are some troubles to make selection of this parameters from
config script, I need additional checks and queries)
after some research in tls module source code I have added some debug
information in file tls_server.c:
if (c->flags & F_CONN_PASSIVE) {
state=S_TLS_ACCEPTING;
dom = tls_lookup_cfg(cfg, TLS_DOMAIN_SRV,
&c->rcv.dst_ip, c->rcv.dst_port, 0, 0);
} else {
state=S_TLS_CONNECTING;
sname = tls_get_connect_server_name();
srvid = tls_get_connect_server_id();
// -------------------------------------------------------------
DBG("Entered client config loockup (c->rcv.dst_port
%d)\n", c->rcv.dst_port);
DBG("Entered client config loockup (&c->rcv.dst_ip
%s)\n", ip_addr2a(&c->rcv.dst_ip));
DBG("Entered client config loockup (c->rcv.src_port
%d)\n", c->rcv.src_port);
DBG("Entered client config loockup (&c->rcv.src_ip
%s)\n", ip_addr2a(&c->rcv.src_ip));
// -------------------------------------------------------------
dom = tls_lookup_cfg(cfg, TLS_DOMAIN_CLI,
&c->rcv.dst_ip,
c->rcv.dst_port, sname, srvid);
}
After making
Oct 26 09:23:56 sip1 /usr/sbin/kamailio[20712]: DEBUG: <core>
[parser/msg_parser.c:597]: parse_msg(): method: <INVITE>
Oct 26 09:23:56 sip1 /usr/sbin/kamailio[20712]: DEBUG: <core>
[parser/msg_parser.c:599]: parse_msg(): uri:
<sip:9098@10.1.23.19:5061;transport=TLS>
Oct 26 09:23:56 sip1 /usr/sbin/kamailio[20712]: DEBUG: <core>
[parser/msg_parser.c:601]: parse_msg(): version: <SIP/2.0>
I see
Oct 26 09:23:56 sip1 /usr/sbin/kamailio[20712]: DEBUG: <core>
[ip_addr.c:229]: print_ip(): tcpconn_new: new tcp connection:
10.1.23.19
Oct 26 09:23:56 sip1 /usr/sbin/kamailio[20712]: DEBUG: <core>
[tcp_main.c:985]: tcpconn_new(): on port 5061, type 3
Oct 26 09:23:56 sip1 /usr/sbin/kamailio[20712]: DEBUG: <core>
[tcp_main.c:1295]: tcpconn_add(): hashes: 1394:0:0, 1
Oct 26 09:23:56 sip1 /usr/sbin/kamailio[20712]: DEBUG: tls
[tls_server.c:197]: tls_complete_init(): completing tls connection
initialization
Oct 26 09:23:56 sip1 /usr/sbin/kamailio[20712]: DEBUG: tls
[tls_server.c:160]: tls_get_connect_server_name(): xavp with outbound
server name not found
Oct 26 09:23:56 sip1 /usr/sbin/kamailio[20712]: DEBUG: tls
[tls_server.c:140]: tls_get_connect_server_id(): xavp with outbound
server id not found
Oct 26 09:23:56 sip1 /usr/sbin/kamailio[20712]: DEBUG: tls
[tls_server.c:219]: tls_complete_init(): Entered client config loockup
(c->rcv.dst_port 40123)
Oct 26 09:23:56 sip1 /usr/sbin/kamailio[20712]: DEBUG: tls
[tls_server.c:220]: tls_complete_init(): Entered client config loockup
(&c->rcv.dst_ip 10.1.23.23)
Oct 26 09:23:56 sip1 /usr/sbin/kamailio[20712]: DEBUG: tls
[tls_server.c:221]: tls_complete_init(): Entered client config loockup
(c->rcv.src_port 5061)
Oct 26 09:23:56 sip1 /usr/sbin/kamailio[20712]: DEBUG: tls
[tls_server.c:222]: tls_complete_init(): Entered client config loockup
(&c->rcv.src_ip 10.1.23.19)
Where:
&c->rcv.dst_ip 10.1.23.23 - it is my local kamailio tls socket ip
address to make tls connect from
c->rcv.dst_port 40123 - it is my local kamailio tls socket port
&c->rcv.src_ip 10.1.23.19 - ip of my TLS device to make tls connection to
c->rcv.src_port 5061 - port of my TLS device to make tls connection to
so if I change line
dom = tls_lookup_cfg(cfg, TLS_DOMAIN_CLI,
&c->rcv.dst_ip,
c->rcv.dst_port, sname, srvid);
to
dom = tls_lookup_cfg(cfg, TLS_DOMAIN_CLI,
&c->rcv.src_ip,
c->rcv.src_port, sname, srvid);
I got correct client domain selection
Oct 26 09:33:56 sip1 /usr/sbin/kamailio[20712]: DEBUG: tls
[tls_server.c:233]: tls_complete_init(): Using initial TLS domain
TLSc<10.1.23.19:5061> (dom 0x7fd2eefa3d68 ctx 0x7fd2ef7e70a8 sn [])
Oct 26 09:33:56 sip1 /usr/sbin/kamailio[20712]: DEBUG: tls
[tls_domain.c:703]: sr_ssl_ctx_info_callback(): SSL handshake started
Can you look at this code?
Thank you in advance.
--
Best regards,
Sergey Basov e-mail: sergey.v.ba...@gmail.com
tel: (+38067) 403-62-54
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