# HG changeset patch
# User Kim Alvefur <zash@zash.se>
# Date 1660785992 -7200
# Node ID d5f322dd424b497ed6f0e1cfa729524377fba780
# Parent  214a679823e881b1d0e067125515a664a19c6c52
mod_s2s: Add event where resolver for s2sout can be tweaked

Could be used to implement custom connection methods (c.f. mod_onions)
without needing to duplicate the rest of route_to_new_session().

Adds a feature to enable detection since it can be difficult to detect
support for an event otherwise.

diff -r 214a679823e8 -r d5f322dd424b core/features.lua
--- a/core/features.lua	Mon May 01 15:10:32 2023 +0200
+++ b/core/features.lua	Thu Aug 18 03:26:32 2022 +0200
@@ -4,5 +4,7 @@
 	available = set.new{
 		-- mod_bookmarks bundled
 		"mod_bookmarks";
+
+		"s2sout-pre-connect-event";
 	};
 };
diff -r 214a679823e8 -r d5f322dd424b plugins/mod_s2s.lua
--- a/plugins/mod_s2s.lua	Mon May 01 15:10:32 2023 +0200
+++ b/plugins/mod_s2s.lua	Thu Aug 18 03:26:32 2022 +0200
@@ -230,6 +230,10 @@
 			resolver;
 		});
 	end
+
+	local pre_event = { session = host_session; resolver = resolver };
+	module:context(from_host):fire_event("s2sout-pre-connect", pre_event);
+	resolver = pre_event.resolver;
 	connect(resolver, listener, nil, { session = host_session });
 	m_initiated_connections:with_labels(from_host):add(1)
 	return true;