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-rw-r--r--debian/patches/keepalive-extensions.patch134
1 files changed, 134 insertions, 0 deletions
diff --git a/debian/patches/keepalive-extensions.patch b/debian/patches/keepalive-extensions.patch
new file mode 100644
index 000000000..fc052ea73
--- /dev/null
+++ b/debian/patches/keepalive-extensions.patch
@@ -0,0 +1,134 @@
1From 2c0a1fef2aaf16c5b97694139239797f0ea33d27 Mon Sep 17 00:00:00 2001
2From: Richard Kettlewell <rjk@greenend.org.uk>
3Date: Sun, 9 Feb 2014 16:09:52 +0000
4Subject: Various keepalive extensions
5
6Add compatibility aliases for ProtocolKeepAlives and SetupTimeOut, supported
7in previous versions of Debian's OpenSSH package but since superseded by
8ServerAliveInterval. (We're probably stuck with this bit for
9compatibility.)
10
11In batch mode, default ServerAliveInterval to five minutes.
12
13Adjust documentation to match and to give some more advice on use of
14keepalives.
15
16Author: Ian Jackson <ian@chiark.greenend.org.uk>
17Author: Matthew Vernon <matthew@debian.org>
18Author: Colin Watson <cjwatson@debian.org>
19Last-Update: 2018-08-24
20
21Patch-Name: keepalive-extensions.patch
22---
23 readconf.c | 14 ++++++++++++--
24 ssh_config.5 | 21 +++++++++++++++++++--
25 sshd_config.5 | 3 +++
26 3 files changed, 34 insertions(+), 4 deletions(-)
27
28diff --git a/readconf.c b/readconf.c
29index 6e26ba32d..3fd0fe7b7 100644
30--- a/readconf.c
31+++ b/readconf.c
32@@ -175,6 +175,7 @@ typedef enum {
33 oStreamLocalBindMask, oStreamLocalBindUnlink, oRevokedHostKeys,
34 oFingerprintHash, oUpdateHostkeys, oHostbasedKeyTypes,
35 oPubkeyAcceptedKeyTypes, oProxyJump,
36+ oProtocolKeepAlives, oSetupTimeOut,
37 oIgnore, oIgnoredUnknownOption, oDeprecated, oUnsupported
38 } OpCodes;
39
40@@ -321,6 +322,8 @@ static struct {
41 { "pubkeyacceptedkeytypes", oPubkeyAcceptedKeyTypes },
42 { "ignoreunknown", oIgnoreUnknown },
43 { "proxyjump", oProxyJump },
44+ { "protocolkeepalives", oProtocolKeepAlives },
45+ { "setuptimeout", oSetupTimeOut },
46
47 { NULL, oBadOption }
48 };
49@@ -1401,6 +1404,8 @@ parse_keytypes:
50 goto parse_flag;
51
52 case oServerAliveInterval:
53+ case oProtocolKeepAlives: /* Debian-specific compatibility alias */
54+ case oSetupTimeOut: /* Debian-specific compatibility alias */
55 intptr = &options->server_alive_interval;
56 goto parse_time;
57
58@@ -2075,8 +2080,13 @@ fill_default_options(Options * options)
59 options->rekey_interval = 0;
60 if (options->verify_host_key_dns == -1)
61 options->verify_host_key_dns = 0;
62- if (options->server_alive_interval == -1)
63- options->server_alive_interval = 0;
64+ if (options->server_alive_interval == -1) {
65+ /* in batch mode, default is 5mins */
66+ if (options->batch_mode == 1)
67+ options->server_alive_interval = 300;
68+ else
69+ options->server_alive_interval = 0;
70+ }
71 if (options->server_alive_count_max == -1)
72 options->server_alive_count_max = 3;
73 if (options->control_master == -1)
74diff --git a/ssh_config.5 b/ssh_config.5
75index 5b99921b4..86ada128e 100644
76--- a/ssh_config.5
77+++ b/ssh_config.5
78@@ -247,8 +247,12 @@ Valid arguments are
79 If set to
80 .Cm yes ,
81 passphrase/password querying will be disabled.
82+In addition, the
83+.Cm ServerAliveInterval
84+option will be set to 300 seconds by default (Debian-specific).
85 This option is useful in scripts and other batch jobs where no user
86-is present to supply the password.
87+is present to supply the password,
88+and where it is desirable to detect a broken network swiftly.
89 The argument must be
90 .Cm yes
91 or
92@@ -1463,7 +1467,14 @@ from the server,
93 will send a message through the encrypted
94 channel to request a response from the server.
95 The default
96-is 0, indicating that these messages will not be sent to the server.
97+is 0, indicating that these messages will not be sent to the server,
98+or 300 if the
99+.Cm BatchMode
100+option is set (Debian-specific).
101+.Cm ProtocolKeepAlives
102+and
103+.Cm SetupTimeOut
104+are Debian-specific compatibility aliases for this option.
105 .It Cm SetEnv
106 Directly specify one or more environment variables and their contents to
107 be sent to the server.
108@@ -1543,6 +1554,12 @@ Specifies whether the system should send TCP keepalive messages to the
109 other side.
110 If they are sent, death of the connection or crash of one
111 of the machines will be properly noticed.
112+This option only uses TCP keepalives (as opposed to using ssh level
113+keepalives), so takes a long time to notice when the connection dies.
114+As such, you probably want
115+the
116+.Cm ServerAliveInterval
117+option as well.
118 However, this means that
119 connections will die if the route is down temporarily, and some people
120 find it annoying.
121diff --git a/sshd_config.5 b/sshd_config.5
122index a0ac717c7..0fbbccbde 100644
123--- a/sshd_config.5
124+++ b/sshd_config.5
125@@ -1566,6 +1566,9 @@ This avoids infinitely hanging sessions.
126 .Pp
127 To disable TCP keepalive messages, the value should be set to
128 .Cm no .
129+.Pp
130+This option was formerly called
131+.Cm KeepAlive .
132 .It Cm TrustedUserCAKeys
133 Specifies a file containing public keys of certificate authorities that are
134 trusted to sign user certificates for authentication, or