3 Jun
2021
3 Jun
'21
6:56 p.m.
### Description
Thank you for implementing #2413, I'm looking forward to use it.
I was trying it on a dev system. It works fine when the same TLS client needs to be
selected for ALL connections.
Having issue with it when connection expected to alternate between multiple configured TLS
clients.
When configured as bellow and event_route alternates between connections (like in logs
bellow) connection is always using TLSc with one of the server-ids, e.g.
"domain-02".
It looks like it's a race between setting server id in event_route and a
"thread" that starts TLS client. In my observations only one TLS client is
used.
Expecting: each outbound connection use TLSc as it was set by
tls_set_connect_server_id().
```
event_route[tm:local-request] {
if (is_method("OPTIONS")) {
$var(contact) = "Contact: <sip:" + $fd +
":5061;transport=tls>\r\n";
append_hf("$var(contact)");
if ($fd == "domain-01") {
tls_set_connect_server_id("domain-01");
xlog("L_INFO",
"ID=$ci|tls_set_connect_server_id(domain-01)\n");
} else if ($fd == "domain-02") {
tls_set_connect_server_id("domain-02");
xlog("L_INFO",
"ID=$ci|tls_set_connect_server_id(domain-02)\n");
}
}
}
```
Dispatcher configured as:
```
loadmodule "dispatcher.so"
modparam("dispatcher", "list_file",
"/etc/kamailio/dispatcher.list")
modparam("dispatcher", "ds_probing_mode", 1)
modparam("dispatcher", "ds_ping_interval", 60)
```
With records like:
```
1 sip:sip1.host.com;transport=tls 0 1
socket=tls:111.222.233.11:5061;ping_from=sip:my-domain-01.com
1 sip:sip2.host.com;transport=tls 0 2
socket=tls:111.222.233.12:5061;ping_from=sip:my-domain-01.com
1 sip:sip3.host.com;transport=tls 0 3
socket=tls:111.222.233.13:5061;ping_from=sip:my-domain-01.com
2 sip:sip1.host.com;transport=tls 0 1
socket=tls:111.222.233.21:5061;ping_from=sip:my-domain-02.com
2 sip:sip2.host.com;transport=tls 0 2
socket=tls:111.222.233.22:5061;ping_from=sip:my-domain-02.com
2 sip:sip3.host.com;transport=tls 0 3
socket=tls:111.222.233.23:5061;ping_from=sip:my-domain-02.com
```
#### Log Messages
```
Jun 3 11:57:44 INFO: <script>:
ID=4eadda397f10fcb1-948(a)1.2.3.4|tls_set_connect_server_id(domain-02)
Jun 3 11:57:44 INFO: <script>:
ID=4eadda397f10fcb2-948(a)1.2.3.4|tls_set_connect_server_id(domain-01)
Jun 3 11:57:44 INFO: <script>:
ID=4eadda397f10fcb3-948(a)1.2.3.4|tls_set_connect_server_id(domain-02)
Jun 3 11:57:44 INFO: <script>:
ID=4eadda397f10fcb4-948(a)1.2.3.4|tls_set_connect_server_id(domain-01)
Jun 3 11:57:44 INFO: <script>:
ID=4eadda397f10fcb5-948(a)1.2.3.4|tls_set_connect_server_id(domain-02)
Jun 3 11:57:44 INFO: <script>:
ID=4eadda397f10fcb6-948(a)1.2.3.4|tls_set_connect_server_id(domain-01)
```
### Additional Information
* **Kamailio Version** - output of `kamailio -v`
```
version: kamailio 5.5.0 (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 7.5.0
```
* **Operating System**:
```
Linux dev03 4.15.0-143-generic #147-Ubuntu SMP Wed Apr 14 16:10:11 UTC 2021 x86_64 x86_64
x86_64 GNU/Linux
Ubuntu 18.04.5 LTS
```
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