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#!/usr/bin/env python3
import time
# Time to live for caching. 0 to disable caching
CACHE_TTL = 15
sourcequery = [
50, # HL Opposing Force
240, # CS:S
320, # HL2 DM
440, # TF2
550, # L4D2
630, # AlienSwarm
730, # CS:GO
4000, # Garrys Mod
107410, # ARMA III
# 221100, # DayZ
252490, # Rust
282440, # Quake Live
328070, # Reflex
346110, # ARK: Survival Evolved
]
sourcequeryinc = [107410, 346110] # ARMA III # ARK: Survival Evolved
import json
import socket
import struct
from SteamAPI import SteamAPI
if CACHE_TTL > 0:
from Caching import Caching
class QueryServer:
def QueryServer(ip, port, gameid):
"""Query a supported server.
Args:
ip: IP of the gameserver
port: Port of the gameserver
gameid: Steam gameid of running game
Returns:
dict() with parsed server values"""
port = int(port)
gameid = int(gameid)
if CACHE_TTL > 0:
cache = Caching.readCache(
"server", "%s-%s-%s" % (str(gameid), ip, str(port)), CACHE_TTL
)
if cache:
return json.loads(cache)
socket.setdefaulttimeout(5)
if int(gameid) in sourcequery:
print("Querying server...")
try:
serverdata = QueryServer._querySourceServer(ip, port, gameid)
if CACHE_TTL > 0:
serialized = json.dumps(serverdata)
Caching.writeCache(
"server", "%s-%s-%s" % (str(gameid), ip, str(port)), serialized
)
except Exception:
return None
return serverdata
return None
def _querySourceServer(ip, port, gameid):
"""Query servers using the source query protocol.
Some servers listen for these queries on an higher port."""
if gameid in sourcequeryinc:
port += 1
starttime = time.time()
conn = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
message = None
try:
# \x54 A2S_INFO
# \x55 A2S_PLAYER
# \x56 A2S_RULES
# \x56 A2S_RULES
conn.connect((ip, port))
# Fetch A2S_INFO
conn.sendall(b"\xFF\xFF\xFF\xFF\x54" + b"Source Engine Query" + b"\x00")
message = conn.recv(4096)
if message[4] == 0x41:
# If server responds with challenge, return it back
conn.sendall(b"\xFF\xFF\xFF\xFF\x54" + b"Source Engine Query" + b"\x00" + message[5:])
message = conn.recv(4096)
# Request Player Info
conn.sendall(b"\xFF\xFF\xFF\xFF\x55\xFF\xFF\xFF\xFF")
challenge = conn.recv(1024)
# Answer challenge / retrieve player info
conn.sendall(b"\xFF\xFF\xFF\xFF\x55" + challenge[5:])
playerdata = conn.recv(8192)
except Exception as e:
print("Exception in SourceQuery connection:", e)
if not message:
return None
finally:
conn.close()
data = {}
latency = time.time() - starttime
data["latency"] = int(latency * 1000)
# [0]-[3] -> 4*\xFF == Package not split
# Otherwise we need to stitch them together
assert message[0:4] == b'\xFF\xFF\xFF\xFF'
data["header"] = chr(message[4])
data["protocol"] = chr(message[5])
message = message[6:]
# Servername
nullterm = message.index(b"\0")
data["name"] = message[:nullterm]
message = message[nullterm + 1 :]
# Mapname
nullterm = message.index(b"\0")
data["map"] = message[:nullterm]
message = message[nullterm + 1 :]
# Folder
nullterm = message.index(b"\0")
data["folder"] = message[:nullterm]
message = message[nullterm + 1 :]
# Game
nullterm = message.index(b"\0")
data["game"] = message[:nullterm]
message = message[nullterm + 1 :]
data["gameid"] = (message[1] << 8) + message[0]
data["players"] = message[2]
data["playersmax"] = message[3]
data["bots"] = message[4]
data["servertype"] = chr(message[5]) # dedicated/local/proxy(tv)
data["enviroment"] = chr(message[6]) # windows/linux/mac
data["visibility"] = message[7] # 0public 1private
data["vac"] = message[8]
message = message[9:]
# Game
nullterm = message.index(b"\0")
data["gameversion"] = message[:nullterm]
message = message[nullterm + 1 :]
extradataflag = message[0]
message = message[1:]
if extradataflag & 0x80:
data["port"] = (message[1] << 8) + message[0]
message = message[2:]
if extradataflag & 0x10:
data["steamid"] = (
(message[7] << 56)
+ (message[6] << 48)
+ (message[5] << 40)
+ (message[4] << 32)
+ (message[3] << 24)
+ (message[2] << 16)
+ (message[1] << 8)
+ (message[0])
)
message = message[8:]
if extradataflag & 0x40:
data["sourcetvport"] = (message[1] << 8) + message[0]
message = message[2:]
nullterm = message.index(b"\0")
data["sourcetvname"] = message[:nullterm]
message = message[nullterm + 1 :]
if extradataflag & 0x20:
nullterm = message.index(b"\0")
data["keywords"] = message[:nullterm]
message = message[nullterm + 1 :]
if extradataflag & 0x01:
data["sgameid"] = (
(message[7] << 56)
+ (message[6] << 48)
+ (message[5] << 40)
+ (message[4] << 32)
+ (message[3] << 24)
+ (message[2] << 16)
+ (message[1] << 8)
+ (message[0])
)
message = message[8:]
if playerdata and playerdata[4] == ord("D"):
players = []
data["player_info"] = players
number = playerdata[5]
playerdata = playerdata[6:]
index = 0
while index < number and playerdata:
player = dict()
player["index"] = playerdata[0]
nullterm = playerdata.index(b"\0", 1)
player_name = playerdata[1:nullterm]
player["name"] = player_name.decode("utf-8", errors="replace")
playerdata = playerdata[nullterm + 1 :]
playerscore = int(struct.unpack("i", playerdata[0:4])[0])
player["score"] = playerscore
playerdata = playerdata[4:]
duration = int(struct.unpack("f", playerdata[0:4])[0])
player["duration"] = duration
playerdata = playerdata[4:]
players.append(player)
index += 1
# Everything is type bytes, so convert things to utf8?
for key, value in data.items():
if isinstance(value, bytes):
try:
value = value.decode("utf-8", errors="replace")
data[key] = value
except UnicodeDecodeError:
data[key] = "UTF8 Error"
pass
return data
if __name__ == "__main__":
# TODO(andre): Maybe run our tests here?
print("This is a module.")
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