From b7548b12a6b2b4abf4d057192c353147e0abba08 Mon Sep 17 00:00:00 2001 From: "djm@openbsd.org" Date: Mon, 23 Oct 2017 05:08:00 +0000 Subject: upstream commit Expose devices allocated for tun/tap forwarding. At the client, the device may be obtained from a new %T expansion for LocalCommand. At the server, the allocated devices will be listed in a SSH_TUNNEL variable exposed to the environment of any user sessions started after the tunnel forwarding was established. ok markus Upstream-ID: e61e53f8ae80566e9ddc0d67a5df5bdf2f3c9f9e --- clientloop.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) (limited to 'clientloop.c') diff --git a/clientloop.c b/clientloop.c index 791d336e..46ede4f0 100644 --- a/clientloop.c +++ b/clientloop.c @@ -1,4 +1,4 @@ -/* $OpenBSD: clientloop.c,v 1.305 2017/09/19 04:24:22 djm Exp $ */ +/* $OpenBSD: clientloop.c,v 1.306 2017/10/23 05:08:00 djm Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -1601,12 +1601,13 @@ client_request_agent(struct ssh *ssh, const char *request_type, int rchan) return c; } -int +char * client_request_tun_fwd(struct ssh *ssh, int tun_mode, int local_tun, int remote_tun) { Channel *c; int fd; + char *ifname = NULL; if (tun_mode == SSH_TUNMODE_NO) return 0; @@ -1614,10 +1615,11 @@ client_request_tun_fwd(struct ssh *ssh, int tun_mode, debug("Requesting tun unit %d in mode %d", local_tun, tun_mode); /* Open local tunnel device */ - if ((fd = tun_open(local_tun, tun_mode)) == -1) { + if ((fd = tun_open(local_tun, tun_mode, &ifname)) == -1) { error("Tunnel device open failed."); - return -1; + return NULL; } + debug("Tunnel forwarding using interface %s", ifname); c = channel_new(ssh, "tun", SSH_CHANNEL_OPENING, fd, fd, -1, CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, "tun", 1); @@ -1638,7 +1640,7 @@ client_request_tun_fwd(struct ssh *ssh, int tun_mode, packet_put_int(remote_tun); packet_send(); - return 0; + return ifname; } /* XXXX move to generic input handler */ -- cgit v1.2.3