File 1449-ssh-alive-small-fixes.patch of Package erlang

From ce7728f97d41a8c816279ebe0243e5d62253088e Mon Sep 17 00:00:00 2001
From: Alexandre Rodrigues <alexandrejbr@live.com>
Date: Fri, 24 Oct 2025 16:24:45 +0200
Subject: [PATCH 19/20] ssh: alive small fixes

---
 lib/ssh/doc/guides/hardening.md | 5 +++++
 lib/ssh/src/ssh.hrl             | 9 +++++----
 lib/ssh/src/ssh_options.erl     | 4 ++--
 3 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/lib/ssh/doc/guides/hardening.md b/lib/ssh/doc/guides/hardening.md
index 6af69745b1..4122819469 100644
--- a/lib/ssh/doc/guides/hardening.md
+++ b/lib/ssh/doc/guides/hardening.md
@@ -91,6 +91,11 @@ increase the resilence. The options to use are:
   the connection. The timeout is started when the authentication phase is
   completed. It defaults to infinity.
 
+- **[alive](`t:ssh:alive_common_option/0`)** -
+  Sets the interval and the maximum number of alive messages that may be sent without
+  receiving any message back. Alive messages are typically used to detect that a connection
+  became unresponsive.
+
 A figure clarifies when a timeout is started and when it triggers:
 
 ![SSH server timeouts](assets/ssh_timeouts.jpg "SSH server timeouts")
diff --git a/lib/ssh/src/ssh.hrl b/lib/ssh/src/ssh.hrl
index 414e666cad..5f010ceebc 100644
--- a/lib/ssh/src/ssh.hrl
+++ b/lib/ssh/src/ssh.hrl
@@ -546,13 +546,14 @@ protocol).
 -type fd_common_option() :: {fd, gen_tcp:socket()} .
 
 -doc """
-This option is used to configure the alive messages. Alive messages are sent through the encrypted
-channel and are typically used to detect that a connection became unresponsive.
+This option is used to configure the alive messages. Alive messages are sent
+through the encrypted channel and are typically used to detect that a
+connection became unresponsive.
 
-The `count_max` sets the maximum number
+`count_max` sets the maximum number
 of alive messages which may be sent without receiving any messages back
 from the peer. If this threshold is reached the connection will be terminated.
-The second value of the tuple sets the timeout interval, in seconds, after which, if no data
+`interval` sets a timeout interval, in milliseconds, after which, if no data
 has been received from the peer, a message to request a response from the peer is sent.
 
 The default is `#{count_max => 3, interval => infinity}`, which means that alive
diff --git a/lib/ssh/src/ssh_options.erl b/lib/ssh/src/ssh_options.erl
index 902ab0fd7c..d0d73a2f04 100644
--- a/lib/ssh/src/ssh_options.erl
+++ b/lib/ssh/src/ssh_options.erl
@@ -862,9 +862,9 @@ default(common) ->
 
       alive =>
           #{default => #{count_max => 3, interval => infinity},
-            chk => fun(#{count_max := Count, interval := IntervalSeconds}) ->
+            chk => fun(#{count_max := Count, interval := Interval}) ->
                            check_pos_integer(Count) andalso
-                               check_timeout(IntervalSeconds)
+                               check_timeout(Interval)
                    end,
             class => user_option
            },
-- 
2.51.0