[hippotat] / server

#!/usr/bin/python3

from hippotat import *

import os

import twisted.internet
from twisted.web.server import NOT_DONE_YET

#import twisted.web.server import Site
#from twisted.web.resource import Resource

import syslog

clients = { }

#---------- "router" ----------

def route(packet, saddr, daddr):
  print('TRACE ', saddr, daddr, packet)
  try: dclient = clients[daddr]
  except KeyError: dclient = None
  if dclient is not None:
    dclient.queue_outbound(packet)
  elif daddr == c.server or daddr not in c.network:
    print('TRACE INBOUND ', saddr, daddr, packet)
    queue_inbound(packet)
  elif daddr == relay:
    log_discard(packet, saddr, daddr, 'relay')
  else:
    log_discard(packet, 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(self.max_queue_time)

    if ip in clients:
      raise ValueError('multiple client cfg sections for %s' % ip)
    clients[ip] = self

  def process_arriving_data(self, 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, saddr, daddr)

  def _req_cancel(self, request):
    request.finish()

  def _req_error(self, err, request):
    self._req_cancel(request)

  def queue_outbound(self, packet):
    self._pq.append(packet)
    self._check_outbound()

  def http_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):
    while True:
      try: request = self._rq[0]
      except IndexError: request = None
      if request and request.finished:
        self._rq.popleft()
        continue

      if not self._pq.nonempty():
        # no packets, oh well
        continue

      if request is None:
        # no request
        break

      # 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()
      # round again, looking for more to do

    while len(self._rq) > self.target_requests_outstanding:
      request = self._rq.popleft()
      request.finish()

class IphttpResource(twisted.web.resource.Resource):
  isLeaf = True
  def render_POST(self, request):
    # find client, update config, etc.
    metadata = request.args['m']
    (ci_s, pw, tro) = metadata.split(b'\n')[0:3]
    ci = ipaddr(ci_s)
    cl = clients[ci]
    if pw != cl.pw: raise ValueError('bad password')

    if pw != cl.target_requests_outstanding:
      raise ...

    try: d = request.args['d']
    except KeyError: d = ''

    cl.process_arriving_data(d)
    cl.new_request(request)

  def render_GET(self, 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))

#---------- config and setup ----------
        
def process_cfg():
  process_cfg_common_always()
  process_cfg_server()
  process_cfg_network()

  try:
    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)

  process_cfg_ipif('server',
                   (('local','server'),
                    ('peer', 'relay'),
                    ('rnets','network')))

common_startup()
process_cfg()
start_ipif(c.ipif_command, route)
start_http()
common_run()
Commit	Line	Data
094ee3a2	1	#!/usr/bin/python3
3fba9787	2
37ab4cdc	3	from hippotat import *
aa663282	4
e2d41dc1 IJ	5	import os
e2d41dc1 IJ	6
e2d41dc1	7	import twisted.internet
e2d41dc1	8	from twisted.web.server import NOT_DONE_YET
e2d41dc1	9
5da7763e IJ	10	#import twisted.web.server import Site
5da7763e IJ	11	#from twisted.web.resource import Resource
3fba9787	12
c4b6d990 IJ	13	import syslog
c4b6d990 IJ	14
b0cfbfce	15	clients = { }
3fba9787	16
5da7763e IJ	17	#---------- "router" ----------
5da7763e IJ	18
ec0c4d95 IJ	19	def route(packet, saddr, daddr):
ec0c4d95 IJ	20	print('TRACE ', saddr, daddr, packet)
84e763c7	21	try: dclient = clients[daddr]
5da7763e IJ	22	except KeyError: dclient = None
	23	if dclient is not None:
	24	dclient.queue_outbound(packet)
88487243	25	elif daddr == c.server or daddr not in c.network:
ec0c4d95	26	print('TRACE INBOUND ', saddr, daddr, packet)
5da7763e	27	queue_inbound(packet)
e2d41dc1	28	elif daddr == relay:
5da7763e IJ	29	log_discard(packet, saddr, daddr, 'relay')
	30	else:
	31	log_discard(packet, saddr, daddr, 'no client')
	32
5da7763e	33	#---------- client ----------
c4b6d990	34
ec88b1f1	35	class Client():
88487243	36	def __init__(self, ip, cs, pw):
ec88b1f1 IJ	37	# instance data members
	38	self._ip = ip
	39	self._cs = cs
88487243	40	self.pw = pw
0ac316c8	41	self._rq = collections.deque() # requests
650a3251	42	# self._pq = PacketQueue(...)
c4b6d990 IJ	43	# plus from config:
	44	# .max_batch_down
	45	# .max_queue_time
	46	# .max_request_time
650a3251	47	# .target_requests_outstanding
88487243 IJ	48
	49	if ip not in c.network:
	50	raise ValueError('client %s not in network' % ip)
	51
650a3251 IJ	52	for k in ('max_batch_down','max_queue_time','max_request_time',
650a3251 IJ	53	'target_requests_outstanding'):
ec88b1f1	54	req = cfg.getint(cs, k)
094ee3a2	55	limit = cfg.getint('limits',k)
c4b6d990	56	self.__dict__[k] = min(req, limit)
ca732796	57
650a3251	58	self._pq = PacketQueue(self.max_queue_time)
c4b6d990	59
88487243 IJ	60	if ip in clients:
	61	raise ValueError('multiple client cfg sections for %s' % ip)
	62	clients[ip] = self
	63
	64	def process_arriving_data(self, d):
	65	for packet in slip.decode(d):
	66	(saddr, daddr) = packet_addrs(packet)
	67	if saddr != self._ip:
	68	raise ValueError('wrong source address %s' % saddr)
	69	route(packet, saddr, daddr)
	70
	71	def _req_cancel(self, request):
	72	request.finish()
	73
	74	def _req_error(self, err, request):
	75	self._req_cancel(request)
	76
	77	def queue_outbound(self, packet):
	78	self._pq.append(packet)
ca732796	79	self._check_outbound()
88487243 IJ	80
	81	def http_request(self, request):
	82	request.setHeader('Content-Type','application/octet-stream')
	83	reactor.callLater(self.max_request_time, self._req_cancel, request)
	84	request.notifyFinish().addErrback(self._req_error, request)
	85	self._rq.append(request)
	86	self._check_outbound()
	87
	88	def _check_outbound(self):
	89	while True:
	90	try: request = self._rq[0]
	91	except IndexError: request = None
	92	if request and request.finished:
	93	self._rq.popleft()
	94	continue
	95
	96	if not self._pq.nonempty():
	97	# no packets, oh well
	98	continue
	99
	100	if request is None:
	101	# no request
	102	break
	103
	104	# request, and also some non-expired packets
7b07f0b5 IJ	105	self._pq.process((lambda: request.sentLength),
	106	request.write,
	107	self.max_batch_down)
0ac316c8	108
88487243	109	assert(request.sentLength)
84e763c7	110	self._rq.popleft()
88487243 IJ	111	request.finish()
88487243 IJ	112	# round again, looking for more to do
0ac316c8	113
88487243 IJ	114	while len(self._rq) > self.target_requests_outstanding:
	115	request = self._rq.popleft()
	116	request.finish()
650a3251	117
5da7763e	118	class IphttpResource(twisted.web.resource.Resource):
c1e4910b	119	isLeaf = True
5da7763e IJ	120	def render_POST(self, request):
5da7763e IJ	121	# find client, update config, etc.
1672ded0 IJ	122	metadata = request.args['m']
1672ded0 IJ	123	(ci_s, pw, tro) = metadata.split(b'\n')[0:3]
1321ad5f	124	ci = ipaddr(ci_s)
1672ded0 IJ	125	cl = clients[ci]
	126	if pw != cl.pw: raise ValueError('bad password')
	127
	128	if pw != cl.target_requests_outstanding:
	129	raise ...
5da7763e IJ	130
	131	try: d = request.args['d']
	132	except KeyError: d = ''
	133
1672ded0 IJ	134	cl.process_arriving_data(d)
1672ded0 IJ	135	cl.new_request(request)
5da7763e	136
8e279651	137	def render_GET(self, request):
040ff511	138	return b'<html><body>hippotat</body></html>'
8e279651	139
5da7763e IJ	140	def start_http():
5da7763e IJ	141	resource = IphttpResource()
b11c6e7a	142	site = twisted.web.server.Site(resource)
88487243 IJ	143	for sa in c.saddrs:
88487243 IJ	144	ep = sa.make_endpoint()
b11c6e7a	145	crash_on_defer(ep.listen(site))
5da7763e IJ	146
	147	#---------- config and setup ----------
	148
3fba9787	149	def process_cfg():
87a7c0c7	150	process_cfg_common_always()
88487243 IJ	151	process_cfg_server()
88487243 IJ	152	process_cfg_network()
e75e9c17 IJ	153
e75e9c17 IJ	154	try:
87a7c0c7	155	c.relay = cfg.get('virtual','relay')
e2d41dc1	156	except NoOptionError:
87a7c0c7	157	for search in c.network.hosts():
88487243	158	if search == c.server: continue
87a7c0c7	159	c.relay = search
e75e9c17	160	break
3fba9787	161
88487243 IJ	162	process_cfg_saddrs()
	163	process_cfg_clients(Client)
	164
	165	process_cfg_ipif('server',
	166	(('local','server'),
034284c3	167	('peer', 'relay'),
88487243	168	('rnets','network')))
5bae5ba3	169
1321ad5f	170	common_startup()
87a7c0c7 IJ	171	process_cfg()
	172	start_ipif(c.ipif_command, route)
	173	start_http()
ae7c7784	174	common_run()