This adds a patch to dropbear, that mimic the "ExitOnForwardFailure" of
OpenSSH. This is the easiest way i've found to implement this, just 2 lines
of code that close the connection if the forward fails. Without this dropbear
will never returns and will hang for ever.
Signed-off-by: Christian Gagneraud <ch...@techworks.ie>
--- /dev/null
+++ b/package/dropbear/patches/600-crude-exit-on-tcp-forward-failure.patch
@@ -0,0 +1,18 @@
+--- a/cli-tcpfwd.c
++++ b/cli-tcpfwd.c
+@@ -79,6 +79,7 @@ void setup_localtcp() {
+ fwd->listenport,
+ fwd->connectaddr,
+ fwd->connectport);
++ dropbear_close("Local TCP forward request failure");
+ }
+ }
+ TRACE(("leave setup_localtcp"))
+@@ -180,6 +181,7 @@ void cli_recv_msg_request_failure() {
+ if (!fwd->have_reply) {
+ fwd->have_reply = 1;
+ dropbear_log(LOG_WARNING, "Remote TCP forward request
failed (port %d -> %s:%d)", fwd->listenport, fwd->connectaddr,
fwd->connectport);
++ dropbear_close("Remote TCP forward request failure");
+ return;
+ }
+ }
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