[asterisk-bugs] [JIRA] (ASTERISK-27434) [patch] chan_sip/ICE: Square brackets around IPv6 addresses.

[Asterisk Team (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-27434?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=240177#comment-240177 ] 

Asterisk Team commented on ASTERISK-27434:
------------------------------------------

Thanks for creating a report! The issue has entered the triage process. That means the issue will wait in this status until a Bug Marshal has an opportunity to review the issue. Once the issue has been reviewed you will receive comments regarding the next steps towards resolution.

A good first step is for you to review the [Asterisk Issue Guidelines|https://wiki.asterisk.org/wiki/display/AST/Asterisk+Issue+Guidelines] if you haven't already. The guidelines detail what is expected from an Asterisk issue report.

Then, if you are submitting a patch, please review the [Patch Contribution Process|https://wiki.asterisk.org/wiki/display/AST/Patch+Contribution+Process].

> [patch] chan_sip/ICE: Square brackets around IPv6 addresses.
> ------------------------------------------------------------
>
>                 Key: ASTERISK-27434
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-27434
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_sip/IPv6
>    Affects Versions: 13.18.2, 15.1.2
>            Reporter: Alexander Traud
>
> Very similar to ASTERISK-26256, IPv6 addresses in the ICE candidates should not be represented with square brackets around them.
> *Steps to reproduce*
> # channel driver _chan_sip_
> # configuration file _sip.conf_ enabled for IPv6: {{bindaddr=::}}
> # configuration file _sip.conf_ enabled for ICE: {{icesupport=yes}}
> # call an extension on this Asterisk server, trace with Wireshark
> *Expected results*
> The answer to the SIP-INVITE contains an SDP media session with ICE candidates, like:
> {{a=candidate:1 1 UDP 2130706431 2001:470:e0d4::ee 8998 typ host}}
> *Actual results*
> The answer to the SIP-INVITE contains an SDP media session with ICE candidates, like:
> {{a=candidate:1 1 UDP 2130706431 \[2001:470:e0d4::ee\] 8998 typ host}}
> *Notes*
> The IP address and the port are separated through a space and not through a colon. Therefore, no brackets are required. Although every implementation should cope with that (see [RFC 5952|http://tools.ietf.org/html/rfc5952#section-6]), according to [RFC 5245 section 15.1|http://tools.ietf.org/html/rfc5245#section-15.1], no brackets are defined at that place:
> {code}
> connection-address = multicast-address / unicast-address
>    unicast-address = IP4-address / IP6-address / FQDN / extn-addr
>        IP6-address = hexpart [ ":" IP4-address ]
>            hexpart = hexseq / hexseq "::" [ hexseq ] / "::" [ hexseq ]
>             hexseq = hex4 *( ":" hex4)
>               hex4 = 1*4HEXDIG
> {code}



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