From 62f1207437863bbd1046cf9034be7f67e4ef8880 Mon Sep 17 00:00:00 2001
From: Simon Ser <contact@emersion.fr>
Date: Fri, 22 Jan 2021 12:00:02 +0100
Subject: [PATCH] Forward ISUPPORT NETWORK token

---
 downstream.go | 8 ++++++--
 upstream.go   | 3 +++
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/downstream.go b/downstream.go
index 551d6ac..4bc59fb 100644
--- a/downstream.go
+++ b/downstream.go
@@ -879,6 +879,10 @@ func (dc *downstreamConn) welcome() error {
 		fmt.Sprintf("CHATHISTORY=%v", dc.srv.HistoryLimit),
 	}
 
+	if uc := dc.upstream(); uc != nil && uc.networkName != "" {
+		isupport = append(isupport, fmt.Sprintf("NETWORK=%v", uc.networkName))
+	}
+
 	dc.SendMessage(&irc.Message{
 		Prefix:  dc.srv.prefix(),
 		Command: irc.RPL_WELCOME,
@@ -901,9 +905,9 @@ func (dc *downstreamConn) welcome() error {
 	})
 	// TODO: other RPL_ISUPPORT tokens
 	dc.SendMessage(&irc.Message{
-		Prefix: dc.srv.prefix(),
+		Prefix:  dc.srv.prefix(),
 		Command: irc.RPL_ISUPPORT,
-		Params: append(append([]string{dc.nick}, isupport...), "are supported"),
+		Params:  append(append([]string{dc.nick}, isupport...), "are supported"),
 	})
 	dc.SendMessage(&irc.Message{
 		Prefix:  dc.srv.prefix(),
diff --git a/upstream.go b/upstream.go
index 41e5ab8..dc6ef5b 100644
--- a/upstream.go
+++ b/upstream.go
@@ -78,6 +78,7 @@ type upstreamConn struct {
 	user    *user
 
 	serverName            string
+	networkName           string
 	availableUserModes    string
 	availableChannelModes map[byte]channelModeType
 	availableChannelTypes string
@@ -670,6 +671,8 @@ func (uc *upstreamConn) handleMessage(msg *irc.Message) error {
 						}
 						uc.availableMemberships = memberships
 					}
+				case "NETWORK":
+					uc.networkName = value
 				}
 			} else {
 				// TODO: handle ISUPPORT negations