[Bug 2601] New: StreamLocalBindUnlink not working

[bugzilla-daemon at bugzilla.mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=2601

            Bug ID: 2601
           Summary: StreamLocalBindUnlink not working
           Product: Portable OpenSSH
           Version: 7.2p1
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: ssh
          Assignee: unassigned-bugs at mindrot.org
          Reporter: harald at redhat.com

StreamLocalBindUnlink is advertised as an option for the client
program.
Following the codepath, it ends up as an option for the server program.

Server process receives in serverloop.c:1409
"streamlocal-forward at openssh.com"

receives fwd.listen_path

calls channel_setup_remote_fwd_listener(&fwd, NULL, &options.fwd_opts)

channels.c:
channel_setup_local_fwd_listener ->
channel_setup_fwd_listener_streamlocal

channel_setup_fwd_listener_streamlocal(int type, struct Forward *fwd,
    struct ForwardOptions *fwd_opts)

calls unix_listener(fwd->listen_path, SSH_LISTEN_BACKLOG,
        fwd_opts->streamlocal_bind_unlink)

fwd_opts->streamlocal_bind_unlink is set in servconf.c and thus a
server option.

To fix this, not only the fwd.listen_path would have to be transmitted,
but also the bind_unlink flag, which would probably need a new type of
message, like "streamlocal-forward-unbind at openssh.com"

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