From a39a538d80f088ceec40b09a241a92cab5ab721c Mon Sep 17 00:00:00 2001
From: sfan5 <sfan5@live.de>
Date: Mon, 5 Nov 2018 17:49:02 +0100
Subject: [PATCH] [serverup] simplify

---
 serverup.py | 107 +++++++++++++++++++++-------------------------------
 1 file changed, 43 insertions(+), 64 deletions(-)

diff --git a/serverup.py b/serverup.py
index 02cad8f..8b2e29d 100755
--- a/serverup.py
+++ b/serverup.py
@@ -1,79 +1,58 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 """
 serverup.py - Minetest server ping module
-Copyright 2014, sfan5
+Copyright 2018, sfan5
 Licensed under GNU General Public License v2.0
 """
+import socket
+import time
 
-import socket, time
+def check(address, port):
+    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+    sock.settimeout(2.0)
+    try:
+        buf = b"\x4f\x45\x74\x03\x00\x00\x00\x01"
+        sock.sendto(buf, (address, port))
+        start = time.time()
+        data = sock.recv(1024)
+        if not data:
+            return
+        end = time.time()
+        peer_id = data[12:14]
+        buf = b"\x4f\x45\x74\x03" + peer_id + b"\x00\x00\x03"
+        sock.sendto(buf, (address, port))
+        sock.close()
+        return (end - start)
+    except (socket.gaierror, socket.error):
+        return
 
 def serverup(phenny, input):
     arg = input.group(2)
     if not arg:
-        return phenny.reply("give me an address (and port if you want)")
-    if not '.' in arg:
-        return phenny.reply("invalid address")
-    if ':' in arg:
-        return phenny.reply("use 'example.org 1337' instead of 'example.org:1337'")
+        return phenny.reply("give me an address and port (optional)")
+
+    arg = arg.replace(":", " ")
     if ' ' in arg:
-        address = arg.split(' ')[0]
-        port = arg.split(' ')[1]
-        if '-' in port or ',' in port:
-            ports = []
-            ports_ = port.split(',')
-            for p in ports_:
-                if '-' in p:
-                    if len(p.split('-')) != 2:
-                        return phenny.reply("invalid port list")
-                    else:
-                        try:
-                            a = int(p.split('-')[0])
-                        except:
-                            return phenny.reply("invalid port: %s" % p.split('-')[0])
-                        try:
-                            b = int(p.split('-')[1]) + 1
-                        except:
-                            return phenny.reply("invalid port: %s" % p.split('-')[1])
-                        for i in range(a, b):
-                            ports.append(i)
-                else:
-                    try:
-                        ports.append(int(p))
-                    except:
-                        return phenny.reply("invalid port: %s" % p)
-        else:
-            try:
-                ports = [int(port)]
-            except:
-                return phenny.reply("invalid port: %s" % port)
+        address, port = arg.split(' ')
+        try:
+            port = int(port)
+        except ValueError:
+            return phenny.reply("invalid port")
     else:
         address = arg
-        ports = [30000]
-    if len(ports) != 1 and input.sender.startswith('#') and not (input.admin or input.owner):
-        return phenny.reply("to check multiple ports please use private chat")
-    if len(ports) > 6 and not (input.admin or input.owner): # owner and admins of the bot can bypass the limit
-        return phenny.reply("ow, too many ports!")
-    for port in ports:
-        repres = address + ':' + str(port)
-        try:
-            sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
-            sock.settimeout(2.5)
-            buf = b"\x4f\x45\x74\x03\x00\x00\x00\x01"
-            sock.sendto(buf, (address, port))
-            start = time.time()
-            data, addr = sock.recvfrom(1000)
-            if data:
-                end = time.time()
-                peer_id = data[12:14]
-                buf = b"\x4f\x45\x74\x03" + peer_id + b"\x00\x00\x03"
-                sock.sendto(buf, (address, port))
-                sock.close()
-                t = (end - start) * 1000
-                phenny.say("%s is up (%dms)" % (repres,t))
-            else:
-                phenny.say("%s seems to be down " % repres)
-        except:
-            phenny.say("%s seems to be down " % repres)
+        port = 30000
+
+    if '.' not in address:
+        return phenny.reply("invalid address")
+    if port < 1024 and port >= 2**16:
+        return phenny.reply("invalid port")
+
+    desc = "%s:%d" % (address, port)
+    result = check(address, port)
+    if result is None:
+        phenny.say("%s seems to be down" % desc)
+    else:
+        phenny.say("%s is up (%dms)" % (desc, result*1000))
 
 serverup.commands = ['up']