[sr-dev] [kamailio/kamailio] Force_send_socket doesn't work in kemi framework. (#2829)

[Zhan Bazarov]

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### Description


Hello, I didn't find force_send_socket function in kemi, so, I've tried to execute it like this:
KSR.x.modf("force_send_socket", "udp:10.199.240.166:5099")
and it doesn't work for me and I'm getting this error in output:



#### Log Messages

```
 2(23767) ERROR: {1 21 INVITE mPXgy6eqY2} app_python [python_support.c:154]: python_handle_exception(): apy_exec: ksr_branch_manage((null)): Unhandled exception in the Python code:
RuntimeError: self is NULL
 2(23767) ERROR: {1 21 INVITE MwD6tWSuw6} app_python [python_support.c:154]: python_handle_exception(): apy_exec: ksr_branch_manage((null)): Unhandled exception in the Python code:
```

### Possible Solutions

When I comment this code - I don't have this error.


### Additional Information

```
version: kamailio 5.4.5 (x86_64/linux) c46342
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_BLACKLIST, 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: c46342
compiled on 12:05:00 Jul 23 2021 with gcc 7.5.0
```


Is there any way how to use force_send_socket mechanism in kemi? 

Thank you!

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