<!--
-->
### Description
The 200OK reply to SUBSCRIBE on IPv6 has the Contact header
wrong formatted, it's appear as:
Contact: <sip:2222:0:0:0:0:0:0:55:4060;transport=udp>
instead of
Contact: <sip:[2222:0:0:0:0:0:0:55]:4060;transport=udp>
<!--
Explain what you did, what you expected to happen, and what actually happened.
-->
### Troubleshooting
#### Reproduction
<!--
If the issue can be reproduced, describe how it can be done.
-->
#### Debugging Data
<!--
-->
```
(paste your debugging data here)
```
#### Log Messages
<!--
Check the syslog file and if there are relevant log messages printed by
Kamailio, add them next, or attach to issue, or provide a link to download them
(e.g., to a pastebin site).
-->
```
(paste your log messages here)
```
#### SIP Traffic
UBSCRIBE sip:+393498786...@ims.mnc021.mcc292.3gppnetwork.org SIP/2.0
Via: SIP/2.0/UDP [2221::5]:4060;branch=z9hG4bK-5-0-95675325205398405120;rport
From:
<sip:+393498786...@ims.mnc021.mcc292.3gppnetwork.org>;tag=5-0-63373794482729304064
To: <sip:+393498786...@ims.mnc021.mcc292.3gppnetwork.org>
Call-ID: callid-5-0-cnt-2-23363871231378927616
Contact: <sip:+393498786882@[2221::5]:4060>;expires=80
Max-Forwards: 70
User-Agent: SIPv3 UeSIM LTE - vtrunk_C
Allow: INVITE,ACK,BYE,CANCEL,NOTIFY,MESSAGE,OPTIONS,PRACK,UPDATE,REFER
Expires: 80
Proxy-Authorization: Digest
username="+393498786...@ims.mnc021.mcc292.3gppnetwork.org",
realm="ims.mnc021.mcc292.3gppnetwork.org",
algorithm=MD5,
nonce="WIIsT1iCKyMEfQy/SmMqSl2b4P4n2vR7",
uri="sip:ims.mnc021.mcc292.3gppnetwork.org",
response="4e39c2ab34e4009dca083e4cbd2acebc",
cnonce="59159616548176674082335766872064",
qop=auth,
nc=00000001
Event: presence.winfo
Allow-Events: reg, presence, presence.winfo
Privacy: none
Accept: application/watcherinfo+xml
CSeq: 76585 SUBSCRIBE
Organization: Sent by UAC Transaction Layer
Content-Length: 0
SIP/2.0 200 OK
Via: SIP/2.0/UDP
[2221::5]:4060;branch=z9hG4bK-5-0-95675325205398405120;rport=4060;received=2221:0:0:0:0:0:0:5
From:
<sip:+393498786...@ims.mnc021.mcc292.3gppnetwork.org>;tag=5-0-63373794482729304064
To:
<sip:+393498786...@ims.mnc021.mcc292.3gppnetwork.org>;tag=be7ce37c4413768ae7f9747982106912-651e
Call-ID: callid-5-0-cnt-2-23363871231378927616
CSeq: 76585 SUBSCRIBE
Expires: 80
Contact: <sip:2222:0:0:0:0:0:0:55:4060;transport=udp>
Server: kamailio (4.4.5 (x86_64/linux))
Content-Length: 0
Warning: 392 [2222:0:0:0:0:0:0:55]:4060 "Noisy feedback tells: pid=27504
req_src_ip=2221:0:0:0:0:0:0:5 req_src_port=4060
in_uri=sip:+393498786...@ims.mnc021.mcc292.3gppnetwork.org
out_uri=sip:+393498786...@ims.mnc021.mcc292.3gppnetwork.org via_cnt==1"
<!--
If the issue is exposed by processing specific SIP messages, grab them with
ngrep or save in a pcap file, then add them next, or attach to issue, or
provide a link to download them (e.g., to a pastebin site).
-->
```
(paste your sip traffic here)
```
### Possible Solutions
<!--
If you found a solution or workaround for the issue, describe it. Ideally,
provide a pull request with a fix.
-->
### Additional Information
* **Kamailio Version** - output of `kamailio -v`
version: kamailio 4.4.5 (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 with gcc 4.9.2
```
(paste your output here)
```
* **Operating System**:
Distributor ID: Debian
Description: Debian GNU/Linux 8.7 (jessie)
Release: 8.7
Codename: jessie
<!--
Details about the operating system, the type: Linux (e.g.,: Debian 8.4, Ubuntu
16.04, CentOS 7.1, ...), MacOS, xBSD, Solaris, ...;
Kernel details (output of `uname -a`)
-->
```
(paste your output here)
```
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Reply to this email directly or view it on GitHub:
https://github.com/kamailio/kamailio/issues/943
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