[Bug 248579] accept(2): IPv4 connections fail (IPv6 connections succeed) with dual IPv4/IPv6 TCP servers

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Wed Aug 12 21:45:20 UTC 2020


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248579

Richard Scheffenegger <rscheff at freebsd.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rscheff at freebsd.org

--- Comment #5 from Richard Scheffenegger <rscheff at freebsd.org> ---
Just validated the suggestion from tuexen@:

freebsd ~]# ./foo
Trying Family=28, Socktype=1, Protocol=6
Connection from (28) ::1
Connection from (28) ::ffff:127.0.0.1

freebsd ~]# nc -6 ::1 5000
Hello
^C
freebsd ~]# nc -4 127.0.0.1 5000
Hello
^C

freebsd ~]# netstat -na
Active Internet connections (including servers)
Proto Recv-Q Send-Q Local Address          Foreign Address        (state)
:
:
tcp46      0      0 *.5000                 *.*                    LISTEN
:
:


=> works as designed (different defaults than Linux). Shall this bug be
retired?

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