-#!/usr/bin/python2
+#!/usr/bin/python3
-from twisted.web.server import Site
-from twisted.web.resource import Resource
+from hippotat import *
+
+import os
+
+import twisted.internet
from twisted.web.server import NOT_DONE_YET
-from twisted.internet import reactor
-import ConfigParser
+#import twisted.web.server import Site
+#from twisted.web.resource import Resource
+
+import syslog
-import cgi
+import traceback
clients = { }
-def ipaddress(input):
+#---------- "router" ----------
+
+def route(packet, iface, saddr, daddr):
+ def lt(dest):
+ log_debug(DBG.ROUTE, 'route: %s -> %s: %s' % (saddr,daddr,dest), d=packet)
+ try: dclient = clients[daddr]
+ except KeyError: dclient = None
+ if dclient is not None:
+ lt('client')
+ dclient.queue_outbound(packet)
+ elif daddr == c.server or daddr not in c.network:
+ lt('inbound')
+ queue_inbound(packet)
+ elif daddr == relay:
+ lt('discard relay')
+ log_discard(packet, iface, saddr, daddr, 'relay')
+ else:
+ lt('discard no-client')
+ log_discard(packet, iface, saddr, daddr, 'no-client')
+
+#---------- client ----------
+
+class Client():
+ def __init__(self, ip, cs, pw):
+ # instance data members
+ self._ip = ip
+ self._cs = cs
+ self.pw = pw
+ self._rq = collections.deque() # requests
+ # self._pq = PacketQueue(...)
+ # plus from config:
+ # .max_batch_down
+ # .max_queue_time
+ # .max_request_time
+ # .target_requests_outstanding
+
+ if ip not in c.network:
+ raise ValueError('client %s not in network' % ip)
+
+ for k in ('max_batch_down','max_queue_time','max_request_time',
+ 'target_requests_outstanding'):
+ req = cfg.getint(cs, k)
+ limit = cfg.getint('limits',k)
+ self.__dict__[k] = min(req, limit)
+
+ self._pq = PacketQueue(ip, self.max_queue_time)
+
+ if ip in clients:
+ raise ValueError('multiple client cfg sections for %s' % ip)
+ clients[ip] = self
+
+ self._log(DBG.INIT, 'new')
+
+ def _log(self, dflag, msg, **kwargs):
+ log_debug(dflag, ('client %s: ' % self._ip)+msg, **kwargs)
+
+ def process_arriving_data(self, d):
+ self._log(DBG.FLOW, 'req data', d=d)
+ for packet in slip.decode(d):
+ (saddr, daddr) = packet_addrs(packet)
+ if saddr != self._ip:
+ raise ValueError('wrong source address %s' % saddr)
+ route(packet, self._ip, saddr, daddr)
+
+ def _req_cancel(self, request):
+ self._log(DBG.HTTPCTRL, 'cancel', idof=request)
+ request.finish()
+
+ def _req_error(self, err, request):
+ self._log(DBG.HTTPCTRL, 'error %s' % err, idof=request)
+ self._req_cancel(request)
+
+ def queue_outbound(self, packet):
+ self._pq.append(packet)
+ self._check_outbound()
+
+ def new_request(self, request):
+ request.setHeader('Content-Type','application/octet-stream')
+ reactor.callLater(self.max_request_time, self._req_cancel, request)
+ request.notifyFinish().addErrback(self._req_error, request)
+ self._rq.append(request)
+ self._check_outbound()
+
+ def _check_outbound(self):
+ log_debug(DBG.HTTPCTRL, 'CHKO')
+ while True:
+ try: request = self._rq[0]
+ except IndexError: request = None
+ if request and request.finished:
+ self._log(DBG.HTTP_CTRL, 'CHKO req finished, discard', idof=request)
+ self._rq.popleft()
+ continue
+
+ if not self._pq.nonempty():
+ # no packets, oh well
+ self._log(DBG.HTTP_CTRL, 'CHKO no packets, OUT-DONE', idof=request)
+ break
+
+ if request is None:
+ # no request
+ self._log(DBG.HTTP_CTRL, 'CHKO no request, OUT-DONE', idof=request)
+ break
+
+ self._log(DBG.HTTP_CTRL, 'CHKO processing', idof=request)
+ # request, and also some non-expired packets
+ self._pq.process((lambda: request.sentLength),
+ request.write,
+ self.max_batch_down)
+
+ assert(request.sentLength)
+ self._rq.popleft()
+ request.finish()
+ self._log(DBG.HTTP, 'complete', idof=request)
+ # round again, looking for more to do
+
+ while len(self._rq) > self.target_requests_outstanding:
+ request = self._rq.popleft()
+ self._log(DBG.HTTP, 'CHKO above target, returning empty', idof=request)
+ request.finish()
+
+def process_request(request, desca):
+ # find client, update config, etc.
+ metadata = request.args[b'm'][0]
+ metadata = metadata.split(b'\r\n')
+ (ci_s, pw, tro) = metadata[0:3]
+ desca['m[0,2]'] = [ci_s, tro]
+ ci_s = ci_s.decode('utf-8')
+ tro = int(tro)
+ desca['tro']= tro
+ ci = ipaddr(ci_s)
+ desca['ci'] = ci
+ cl = clients[ci]
+ if pw != cl.pw: raise ValueError('bad password')
+ desca['pwok']=True
+
+ if tro != cl.target_requests_outstanding:
+ raise ValueError('tro must be %d' % cl.target_requests_outstanding)
+
try:
- r = IPv4Address(input)
- except AddressValueError:
- r = IPv6Address(input)
- return r
+ d = request.args[b'd']
+ desca['d'] = d
+ except KeyError: d = ''
+
+ cl.process_arriving_data(d)
+ cl.new_request(request)
-def ipnetwork(input):
+def log_http(desca, msg):
try:
- r = IPv4Network(input)
- except NetworkValueError:
- r = IPv6Network(input)
- return r
+ d = desca['d']
+ del desca['d']
+ except KeyError:
+ d = None
+ log_debug(DBG.HTTP, msg + repr(desca), d=d)
+
+class IphttpResource(twisted.web.resource.Resource):
+ isLeaf = True
+ def render_POST(self, request):
+ log_debug(DBG.HTTP_FULL,
+ 'req recv: ' + repr(request) + ' ' + repr(request.args),
+ idof=id(request))
+ desca = {'d': None}
+ try: process_request(request, desca)
+ except Exception as e:
+ emsg = traceback.format_exc()
+ log_http(desca, 'EXCEPTION ' + emsg)
+ request.setHeader('Content-Type','text/plain; charset="utf-8"')
+ request.setResponseCode(400)
+ return (emsg + ' # ' + repr(desca) + '\r\n').encode('utf-8')
+ log_http(desca, '... [%s]' % id(request))
+ return NOT_DONE_YET
+ def render_GET(self, request):
+ log_debug(DBG.HTTP, 'GET request')
+ return b'<html><body>hippotat</body></html>'
+
+def start_http():
+ resource = IphttpResource()
+ site = twisted.web.server.Site(resource)
+ for sa in c.saddrs:
+ ep = sa.make_endpoint()
+ crash_on_defer(ep.listen(site))
+ log_debug(DBG.INIT, 'listening on %s' % sa)
+
+#---------- config and setup ----------
+
def process_cfg():
- global network
- global ourself
+ process_cfg_common_always()
+ process_cfg_server()
+ process_cfg_network()
- network = ipnetwork(cfg.get('virtual','network')
try:
- ourself = cfg.get('virtual','server')
- except ConfigParser.NoOptionError:
- ourself = network.hosts().next()
+ c.relay = cfg.get('virtual','relay')
+ except NoOptionError:
+ for search in c.network.hosts():
+ if search == c.server: continue
+ c.relay = search
+ break
-
+ process_cfg_saddrs()
+ process_cfg_clients(Client)
-class Client():
- def __init__(ip):
- # instance data members
- # ._ip
- self._ip = IPv4Address(ip)
- clients
+ process_cfg_ipif('server',
+ (('local','server'),
+ ('peer', 'relay'),
+ ('rnets','network')))
-class FormPage(Resource):
- def render_POST(self, request):
+common_startup()
+process_cfg()
+start_ipif(c.ipif_command, route)
+start_http()
+common_run()
~ian / hippotat.git / blobdiff