From b4da3ef8feab36653ac005d14d1ee3e3cc531301 Mon Sep 17 00:00:00 2001
From: Les De Ridder <les@lesderid.net>
Date: Mon, 24 Apr 2017 06:57:21 +0200
Subject: [PATCH] Implement KILL

---
 source/ircd/connection.d | 39 +++++++++++++++++++++++++++++++++++++++
 source/ircd/server.d     | 14 ++++++++++++++
 2 files changed, 53 insertions(+)

diff --git a/source/ircd/connection.d b/source/ircd/connection.d
index 29d5554..971b422 100644
--- a/source/ircd/connection.d
+++ b/source/ircd/connection.d
@@ -72,6 +72,11 @@ class Connection
 		_connection.write(messageString ~ "\r\n");
 	}
 
+	void closeConnection()
+	{
+		_connection.close();
+	}
+
 	//sends the message to all clients who have a channel in common with this client
 	void sendToPeers(Message message)
 	{
@@ -190,6 +195,9 @@ class Connection
 				case "WHOIS":
 					onWhois(message);
 					break;
+				case "KILL":
+					onKill(message);
+					break;
 				default:
 					writeln("unknown command '", message.command, "'");
 					send(Message(_server.name, "421", [nick, message.command, "Unknown command"]));
@@ -690,6 +698,32 @@ class Connection
 		send(Message(_server.name, "318", [nick, mask, "End of WHOIS list"], true));
 	}
 
+	void onKill(Message message)
+	{
+		if(!isOperator)
+		{
+			sendErrNoPrivileges();
+			return;
+		}
+
+		if(message.parameters.length < 2)
+		{
+			sendErrNeedMoreParams(message.command);
+			return;
+		}
+
+		auto nick = message.parameters[0];
+		if(!_server.canFindConnectionByNick(nick))
+		{
+			sendErrNoSuchNick(nick);
+			return;
+		}
+
+		auto comment = message.parameters[1];
+
+		_server.kill(this, nick, comment);
+	}
+
 	void sendWhoReply(string channel, Connection user, uint hopCount)
 	{
 		auto flags = user.modes.canFind('a') ? "G" : "H";
@@ -755,6 +789,11 @@ class Connection
 		send(Message(_server.name, "461", [nick, command, "Not enough parameters"], true));
 	}
 
+	void sendErrNoPrivileges()
+	{
+		send(Message(_server.name, "481", [nick, "Permission Denied- You're not an IRC operator"], true));
+	}
+
 	void sendErrChanopPrivsNeeded(string channel)
 	{
 		send(Message(_server.name, "482", [nick, channel, "You're not channel operator"], true));
diff --git a/source/ircd/server.d b/source/ircd/server.d
index 9498d4b..db7c584 100644
--- a/source/ircd/server.d
+++ b/source/ircd/server.d
@@ -383,6 +383,20 @@ class Server
 		connection.send(Message(name, "319", [connection.nick, user.nick, userChannels], true));
 	}
 
+	void kill(Connection killer, string nick, string comment)
+	{
+		auto user = findConnectionByNick(nick)[0];
+
+		user.send(Message(killer.mask, "KILL", [nick, comment], true));
+
+		//TODO: Find out if any RFC specifies a QUIT message
+		quit(user, "Killed by " ~ killer.nick ~ " (" ~ comment ~ ")");
+
+		//TODO: Find out if what we have to send here
+		user.send(Message(null, "ERROR", ["Closing Link: Killed by " ~ killer.nick ~ " (" ~ comment ~ ")"], true));
+		user.closeConnection();
+	}
+
 	void listen(ushort port = 6667)
 	{
 		listenTCP(port, &acceptConnection);