From c4d1135bf4d321dbed6ab3a94f87029e87f22a5d Mon Sep 17 00:00:00 2001
From: Runxi Yu <me@runxiyu.org>
Date: Sun, 8 Dec 2024 10:58:12 +0800
Subject: USER: Don't allow reregistration

---
 cmd_user.go | 10 +++++++---
 numerics.go |  1 +
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/cmd_user.go b/cmd_user.go
index 99d9027..3db56c7 100644
--- a/cmd_user.go
+++ b/cmd_user.go
@@ -13,10 +13,14 @@ func handleClientUser(msg RMsg, client *Client) bool {
 		client.Send(MakeMsg(self, ERR_NEEDMOREPARAMS, "USER", "Not enough parameters"))
 		return true
 	}
-	client.Ident = "~" + msg.Params[0]
-	client.Gecos = msg.Params[3]
-	if client.State == ClientStatePreRegistration {
+	switch (client.State) {
+	case ClientStatePreRegistration:
+		client.Ident = "~" + msg.Params[0]
+		client.Gecos = msg.Params[3]
 		client.checkRegistration()
+	case ClientStateRegistered:
+		client.Send(MakeMsg(self, ERR_ALREADYREGISTERED, client.Nick, "You may not reregister"))
+	case ClientStateRemote:
 	}
 	return true
 }
diff --git a/numerics.go b/numerics.go
index c8a351b..8877306 100644
--- a/numerics.go
+++ b/numerics.go
@@ -9,4 +9,5 @@ const (
 	ERR_INPUTTOOLONG   = "417"
 	ERR_NEEDMOREPARAMS = "461"
 	ERR_NICKNAMEINUSE  = "433"
+	ERR_ALREADYREGISTERED = "462"
 )
-- 
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