[Bug 280119] dhclient: Ignore SIP servers dhcp option defined in RFC 3361

From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 04 Jul 2024 01:19:25 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=280119

            Bug ID: 280119
           Summary: dhclient: Ignore SIP servers dhcp option defined in
                    RFC 3361
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: bugs@FreeBSD.org
          Reporter: naito.yuichiro@gmail.com

Created attachment 251854
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=251854&action=edit
ignore_SIP_servers_dhcp_option.patch

My router NSD-G1000T made by SONY sends SIP servers DHCP option (120)
in the DHCP response and dhclient(8) warns a message 'unknown dhcp option value
0x78'.
It's annoying to me.

The SIP servers DHCP option isn't needed to handle anything.
The attached patch shuts up the warning message.

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