1 files changed, 74 insertions, 0 deletions

diff --git a/debian/patches/ssh1-keepalive.patch b/debian/patches/ssh1-keepalive.patch
new file mode 100644
index 000000000..60537323a
--- /dev/null
+++ b/debian/patches/ssh1-keepalive.patch
@@ -0,0 +1,74 @@
+From 789d58ed3df120c7b80d07fb2d259c216194a29c Mon Sep 17 00:00:00 2001
+From: Colin Watson <cjwatson@debian.org>
+Date: Sun, 9 Feb 2014 16:09:51 +0000
+Subject: Partial server keep-alive implementation for SSH1
+
+Bug: https://bugzilla.mindrot.org/show_bug.cgi?id=1712
+Last-Update: 2013-09-14
+
+Patch-Name: ssh1-keepalive.patch
+---
+ clientloop.c |   25 +++++++++++++++----------
+ ssh_config.5 |    5 ++++-
+ 2 files changed, 19 insertions(+), 11 deletions(-)
+
+diff --git a/clientloop.c b/clientloop.c
+index 6d8cd7d..73a800c 100644
+--- a/clientloop.c
++++ b/clientloop.c
+@@ -563,16 +563,21 @@ client_global_request_reply(int type, u_int32_t seq, void *ctxt)
+ static void
+ server_alive_check(void)
+ {
+-       if (packet_inc_alive_timeouts() > options.server_alive_count_max) {
+-               logit("Timeout, server %s not responding.", host);
+-               cleanup_exit(255);
++       if (compat20) {
++               if (packet_inc_alive_timeouts() > options.server_alive_count_max) {
++                       logit("Timeout, server %s not responding.", host);
++                       cleanup_exit(255);
++               }
++               packet_start(SSH2_MSG_GLOBAL_REQUEST);
++               packet_put_cstring("keepalive@openssh.com");
++               packet_put_char(1);     /* boolean: want reply */
++               packet_send();
++               /* Insert an empty placeholder to maintain ordering */
++               client_register_global_confirm(NULL, NULL);
++       } else {
++               packet_send_ignore(0);
++               packet_send();
+        }
+-       packet_start(SSH2_MSG_GLOBAL_REQUEST);
+-       packet_put_cstring("keepalive@openssh.com");
+-       packet_put_char(1);     /* boolean: want reply */
+-       packet_send();
+-       /* Insert an empty placeholder to maintain ordering */
+-       client_register_global_confirm(NULL, NULL);
+ }
+ 
+ /*
+@@ -634,7 +639,7 @@ client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp,
+         */
+ 
+        timeout_secs = INT_MAX; /* we use INT_MAX to mean no timeout */
+-       if (options.server_alive_interval > 0 && compat20) {
++       if (options.server_alive_interval > 0) {
+                timeout_secs = options.server_alive_interval;
+                server_alive_time = now + options.server_alive_interval;
+        }
+diff --git a/ssh_config.5 b/ssh_config.5
+index e7accd6..473971e 100644
+--- a/ssh_config.5
++++ b/ssh_config.5
+@@ -1294,7 +1294,10 @@ If, for example,
+ .Cm ServerAliveCountMax
+ is left at the default, if the server becomes unresponsive,
+ ssh will disconnect after approximately 45 seconds.
+-This option applies to protocol version 2 only.
++This option applies to protocol version 2 only; in protocol version
++1 there is no mechanism to request a response from the server to the
++server alive messages, so disconnection is the responsibility of the TCP
++stack.
+ .It Cm ServerAliveInterval
+ Sets a timeout interval in seconds after which if no data has been received
+ from the server,