[sr-dev] [kamailio/kamailio] core:server_id is not sufficient enough to store the one that is generated for the ipv6 socket (#1322)

[Surendra Tiwari]

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### Description
i want to give decimal value of ip address to the server_id but when i am converting the ipv6 address to decimal then its bigger then integer range.so here in kamailio, we need to update every place where ever we are using server id by int64.we need to also make changes to database also by changing the server_id field type.

### Troubleshooting

#### Reproduction
issue can be reproduced by following steps: 
first get the server_id by converting the ipv6 ip address to decimal so whenever any endpoint register it will store the -1 into database as integer range is reached to limit.

#### Debugging Data

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#### Log Messages

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#### SIP Traffic

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### Possible Solutions

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### Additional Information

  * **Kamailio Version** - output of `kamailio -v`

```
version: kamailio 5.0.4 (x86_64/linux) 
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, 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
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, 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 on 13:58:01 Nov 20 2017 with unknown

```

* **Operating System**:

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Kernel details (output of `uname -a`)
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```
root at ip-172-31-0-35:~# uname -a
Linux ip-172-31-0-35 4.4.0-1022-aws #31-Ubuntu SMP Tue Jun 27 11:27:55 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
```


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