""" TCP server that communicates with terminals """
-from getopt import getopt
from logging import getLogger
-from logging.handlers import SysLogHandler
-from socket import socket, AF_INET, SOCK_STREAM, SOL_SOCKET, SO_REUSEADDR
+from os import umask
+from socket import socket, AF_INET6, SOCK_STREAM, SOL_SOCKET, SO_REUSEADDR
from time import time
from struct import pack
import zmq
from . import common
-from .gps303proto import HIBERNATION, LOGIN, parse_message, proto_of_message
+from .gps303proto import (
+ HIBERNATION,
+ LOGIN,
+ inline_response,
+ parse_message,
+ proto_of_message,
+)
+from .zmsg import Bcast, Resp
log = getLogger("gps303/collector")
-class Bcast:
- """Zmq message to broadcast what was received from the terminal"""
-
- def __init__(self, imei, msg):
- self.as_bytes = (
- pack("B", proto_of_message(msg))
- + ("0000000000000000" if imei is None else imei).encode()
- + msg
- )
-
-
-class Resp:
- """Zmq message received from a third party to send to the terminal"""
-
- def __init__(self, *args, **kwargs):
- if not kwargs and len(args) == 1 and isinstance(args[0], bytes):
- self.imei = msg[:16].decode()
- self.payload = msg[16:]
- elif len(args) == 0:
- self.imei = kwargs["imei"]
- self.payload = kwargs["payload"]
-
-
class Client:
"""Connected socket to the terminal plus buffer and metadata"""
log.debug("Closing fd %d (IMEI %s)", self.sock.fileno(), self.imei)
self.sock.close()
self.buffer = b""
- self.imei = None
def recv(self):
"""Read from the socket and parse complete messages"""
log.info(
"LOGIN from fd %d (IMEI %s)", self.sock.fileno(), self.imei
)
- msgs.append(packet)
+ msgs.append((when, self.addr, packet))
return msgs
def send(self, buffer):
def add(self, clntsock, clntaddr):
fd = clntsock.fileno()
+ log.info("Start serving fd %d from %s", fd, clntaddr)
self.by_fd[fd] = Client(clntsock, clntaddr)
return fd
if msgs is None:
return None
result = []
- for msg in msgs:
- if proto_of_message(msg) == LOGIN.PROTO: # Could do blindly...
+ for when, peeraddr, packet in msgs:
+ if proto_of_message(packet) == LOGIN.PROTO: # Could do blindly...
self.by_imei[clnt.imei] = clnt
- result.append((clnt.imei, msg))
+ result.append((clnt.imei, when, peeraddr, packet))
+ log.debug(
+ "Received from %s (IMEI %s): %s",
+ peeraddr,
+ clnt.imei,
+ packet.hex(),
+ )
return result
def response(self, resp):
if resp.imei in self.by_imei:
- self.by_imei[resp.imei].send(resp.payload)
+ self.by_imei[resp.imei].send(resp.packet)
+ else:
+ log.info("Not connected (IMEI %s)", resp.imei)
def runserver(conf):
zctx = zmq.Context()
zpub = zctx.socket(zmq.PUB)
+ zpull = zctx.socket(zmq.PULL)
+ oldmask = umask(0o117)
zpub.bind(conf.get("collector", "publishurl"))
- zsub = zctx.socket(zmq.SUB)
- zsub.connect(conf.get("collector", "listenurl"))
- tcpl = socket(AF_INET, SOCK_STREAM)
+ zpull.bind(conf.get("collector", "listenurl"))
+ umask(oldmask)
+ tcpl = socket(AF_INET6, SOCK_STREAM)
tcpl.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
tcpl.bind(("", conf.getint("collector", "port")))
tcpl.listen(5)
tcpfd = tcpl.fileno()
poller = zmq.Poller()
- poller.register(zsub, flags=zmq.POLLIN)
+ poller.register(zpull, flags=zmq.POLLIN)
poller.register(tcpfd, flags=zmq.POLLIN)
clients = Clients()
try:
tosend = []
topoll = []
tostop = []
- events = poller.poll(10)
+ events = poller.poll(1000)
for sk, fl in events:
- if sk is zsub:
+ if sk is zpull:
while True:
try:
- msg = zsub.recv(zmq.NOBLOCK)
- tosend.append(Resp(msg))
+ msg = zpull.recv(zmq.NOBLOCK)
+ zmsg = Resp(msg)
+ zpub.send(
+ Bcast(
+ is_incoming=False,
+ proto=proto_of_message(zmsg.packet),
+ imei=zmsg.imei,
+ packet=zmsg.packet,
+ ).packed
+ )
+ tosend.append(zmsg)
except zmq.Again:
break
elif sk == tcpfd:
clntsock, clntaddr = tcpl.accept()
topoll.append((clntsock, clntaddr))
- else:
- for imei, msg in clients.recv(sk):
- zpub.send(Bcast(imei, msg).as_bytes)
- if (
- msg is None
- or proto_of_message(msg) == HIBERNATION.PROTO
- ):
- log.debug(
- "HIBERNATION from fd %d (IMEI %s)", sk, imei
+ elif fl & zmq.POLLIN:
+ received = clients.recv(sk)
+ if received is None:
+ log.debug(
+ "Terminal gone from fd %d (IMEI %s)", sk, imei
+ )
+ tostop.append(sk)
+ else:
+ for imei, when, peeraddr, packet in received:
+ proto = proto_of_message(packet)
+ zpub.send(
+ Bcast(
+ proto=proto,
+ imei=imei,
+ when=when,
+ peeraddr=peeraddr,
+ packet=packet,
+ ).packed
)
- tostop.append(sk)
- elif proto_of_message(msg) == LOGIN.PROTO:
- clients.response(Resp(imei=imei, payload=LOGIN.response()))
+ if proto == HIBERNATION.PROTO:
+ log.debug(
+ "HIBERNATION from fd %d (IMEI %s)",
+ sk,
+ imei,
+ )
+ tostop.append(sk)
+ respmsg = inline_response(packet)
+ if respmsg is not None:
+ clients.response(
+ Resp(imei=imei, packet=respmsg)
+ )
+ else:
+ log.debug("Stray event: %s on socket %s", fl, sk)
# poll queue consumed, make changes now
for fd in tostop:
poller.unregister(fd)
clients.stop(fd)
for zmsg in tosend:
+ log.debug("Sending to the client: %s", zmsg)
clients.response(zmsg)
for clntsock, clntaddr in topoll:
fd = clients.add(clntsock, clntaddr)
- poller.register(fd)
+ poller.register(fd, flags=zmq.POLLIN)
except KeyboardInterrupt:
pass
projects / loctrkd.git / blobdiff