From 09d5b1385cd3e5e9997bfc817d3f75043d40f85a Mon Sep 17 00:00:00 2001
From: Curt Hash <chash@cfl-superfund.lanl.gov>
Date: Tue, 9 Feb 2010 16:27:46 -0700
Subject: [PATCH] pointsd now using tcp connections .. not tested

---
 ctf/pointsd.py | 96 +++++++++++++++++++++++++++++++-------------------
 1 file changed, 60 insertions(+), 36 deletions(-)

diff --git a/ctf/pointsd.py b/ctf/pointsd.py
index f557ab5..d084bc4 100755
--- a/ctf/pointsd.py
+++ b/ctf/pointsd.py
@@ -9,48 +9,72 @@ from . import config
 
 house = config.get('global', 'house_team')
 
-class MyHandler(asyncore.dispatcher):
-    def __init__(self, port=6667):
-        asyncore.dispatcher.__init__(self)
-        self.create_socket(socket.AF_INET, socket.SOCK_DGRAM)
-        self.bind(('', port))
-        self.store = points.Storage(fix=True)
-        self.acked = set()
-        self.outq = []
+class PointsServer(asyncore.dispatcher):
+	''' Receive connections from client and passes them off to handler. '''
 
-    def writable(self):
-        return bool(self.outq)
+	def __init__(self, port=6667):
+		asyncore.dispatcher.__init__(self)
+		self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
+		self.bind(('', port))
+		self.listen(5)
+		self.acked = set()
+		self.outq = []
 
-    def handle_write(self):
-        dgram, peer = self.outq.pop(0)
-        self.socket.sendto(dgram, peer)
+	def handle_accept(self):
+		''' Accept a connection from a client and pass it to the handler. '''
+		sock, addr = self.accept()
+		clientip = addr[0]
+		ClientHandler(sock, clientip)
 
-    def handle_read(self):
-        now = int(time.time())
-        dgram, peer = self.socket.recvfrom(4096)
-        try:
-            id, when, cat, team, score = points.decode_request(dgram)
-        except ValueError as e:
-            return self.respond(peer, now, str(e))
-        team = team or house
+class ClientHandler(asyncore.dispatcher):
+	''' Handles talking to clients. '''
 
-        # Replays can happen legitimately.
-        if not ((peer, id) in self.acked):
-            if not (now - 2 < when <= now):
-                return self.respond(peer, id, 'Your clock is off')
-            self.store.add((when, cat, team, score))
-            self.acked.add((peer, id))
+	def __init__(self, sock, clientip):
+		asyncore.dispatcher.__init__(self, sock=sock)
+		self.clientip = clientip
+		self.store = points.Storage(fix=True)
+		self.acked = set()
+		self.outq = []
 
-        self.respond(peer, id, 'OK')
+	def writable(self):
+		''' If there is data in the queue, the socket is made writable. '''
+		return bool(self.outq)
+	
+	def handle_write(self):
+		''' Pop data from the queue and send it to the client. '''
+		resp = self.outq.pop(0)
+		self.send(resp)
 
-    def respond(self, peer, id, txt):
-        resp = points.encode_response(id, txt)
-        self.outq.append((resp, peer))
+		# conversation over
+		self.close()
+	
+	def handle_read(self):
+		''' Receive data from the client. '''
+		now = int(time.time())
+		data = self.recv(4096)
 
+		# decode their message
+		try:
+			id, when, cat, team, score = points.decode_request(data)
+		except ValueError as e:
+			return self.respond(now, str(e))
+		team = team or house
 
-def start():
-    return MyHandler()
+		# do points and send ACK
+		if not ((self.clientip, id) in self.acked):
+			if not (now - 2 < when <= now):
+				return self.respond(id, 'Your clock is off')
+			self.store.add((when, cat, team, score))
+			self.acked.add((self.clientip, id))
+
+		self.respond(id, 'OK')
+	
+	def respond(self, id, txt):
+		''' Queue responses to the client. '''
+		resp = points.encode_response(id, txt)
+		self.outq.append(resp)
+
+if __name__ == '__main__':
+	server = PointsServer()
+	asyncore.loop()
 
-if __name__ == "__main__":
-    h = start()
-    asyncore.loop()