[Bug 255388] [PATCH] Do not forward datagrams original from 169.254.0.0/16

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=255388

            Bug ID: 255388
           Summary: [PATCH] Do not forward datagrams original from
                    169.254.0.0/16
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: zlei.huang at gmail.com

Created attachment 224415
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=224415&action=edit
Patch for ip_input.c

The current implement of ip_input() reject packets destined for 169.254.0.0/16,
but not those original from 169.254.0.0/16 link-local addresses.

Initial commit
https://cgit.freebsd.org/src/commit/sys/netinet/ip_input.c?id=f8429ca2e1fa36f5c35a764438475415272eff2e
.

See RFC 3927 section 2.7.

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