From 074598778d5afa8497745894ce7eba490d2b89f2 Mon Sep 17 00:00:00 2001
From: Stefano <stefano.scafiti96@gmail.com>
Date: Wed, 9 Mar 2022 21:26:49 +0100
Subject: [PATCH] Add handler for 410 response, notifying invalid cap commands

---
 client/handlers.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/client/handlers.go b/client/handlers.go
index ede773d..f612fe9 100644
--- a/client/handlers.go
+++ b/client/handlers.go
@@ -20,6 +20,7 @@ var intHandlers = map[string]HandlerFunc{
 	NICK:     (*Conn).h_NICK,
 	PING:     (*Conn).h_PING,
 	CAP:      (*Conn).h_CAP,
+	"410":    (*Conn).h_410,
 }
 
 // set up the ircv3 capabilities supported by this client which will be requested by default to the server.
@@ -151,6 +152,11 @@ func (c *capSet) Size() int {
 	return len(c.caps)
 }
 
+// This handler is triggered when an invalid cap command is received by the server.
+func (conn *Conn) h_410(line *Line) {
+	logging.Warn("Invalid cap subcommand: ", line.Args[1])
+}
+
 // Handler for capability negotiation commands.
 // Note that even if multiple CAP_END commands may be sent to the server during negotiation,
 // only the first will be considered.