| | 1 | #!/usr/bin/python3 |
| | 2 | |
| | 3 | from hippotat import * |
| | 4 | |
| | 5 | import os |
| | 6 | |
| | 7 | import twisted.internet |
| | 8 | from twisted.web.server import NOT_DONE_YET |
| | 9 | |
| | 10 | #import twisted.web.server import Site |
| | 11 | #from twisted.web.resource import Resource |
| | 12 | |
| | 13 | import syslog |
| | 14 | |
| | 15 | clients = { } |
| | 16 | |
| | 17 | #---------- "router" ---------- |
| | 18 | |
| | 19 | def route(packet, saddr, daddr): |
| | 20 | print('TRACE ', saddr, daddr, packet) |
| | 21 | try: client = clients[daddr] |
| | 22 | except KeyError: dclient = None |
| | 23 | if dclient is not None: |
| | 24 | dclient.queue_outbound(packet) |
| | 25 | elif daddr == c.server or daddr not in c.network: |
| | 26 | print('TRACE INBOUND ', saddr, daddr, packet) |
| | 27 | queue_inbound(packet) |
| | 28 | elif daddr == relay: |
| | 29 | log_discard(packet, saddr, daddr, 'relay') |
| | 30 | else: |
| | 31 | log_discard(packet, saddr, daddr, 'no client') |
| | 32 | |
| | 33 | #---------- client ---------- |
| | 34 | |
| | 35 | class Client(): |
| | 36 | def __init__(self, ip, cs, pw): |
| | 37 | # instance data members |
| | 38 | self._ip = ip |
| | 39 | self._cs = cs |
| | 40 | self.pw = pw |
| | 41 | self._rq = collections.deque() # requests |
| | 42 | # self._pq = PacketQueue(...) |
| | 43 | # plus from config: |
| | 44 | # .max_batch_down |
| | 45 | # .max_queue_time |
| | 46 | # .max_request_time |
| | 47 | # .target_requests_outstanding |
| | 48 | |
| | 49 | if ip not in c.network: |
| | 50 | raise ValueError('client %s not in network' % ip) |
| | 51 | |
| | 52 | for k in ('max_batch_down','max_queue_time','max_request_time', |
| | 53 | 'target_requests_outstanding'): |
| | 54 | req = cfg.getint(cs, k) |
| | 55 | limit = cfg.getint('limits',k) |
| | 56 | self.__dict__[k] = min(req, limit) |
| | 57 | |
| | 58 | self._pq = PacketQueue(self.max_queue_time) |
| | 59 | |
| | 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) |
| | 79 | self._check_outbound() |
| | 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 |
| | 105 | while True: |
| | 106 | packet = self.pq.popleft() |
| | 107 | if packet is None: break |
| | 108 | |
| | 109 | encoded = slip.encode(packet) |
| | 110 | |
| | 111 | if request.sentLength > 0: |
| | 112 | if (request.sentLength + len(slip.delimiter) |
| | 113 | + len(encoded) > self.max_batch_down): |
| | 114 | break |
| | 115 | request.write(slip.delimiter) |
| | 116 | |
| | 117 | request.write(encoded) |
| | 118 | self._pq.popLeft() |
| | 119 | |
| | 120 | assert(request.sentLength) |
| | 121 | self._rq.popLeft() |
| | 122 | request.finish() |
| | 123 | # round again, looking for more to do |
| | 124 | |
| | 125 | while len(self._rq) > self.target_requests_outstanding: |
| | 126 | request = self._rq.popleft() |
| | 127 | request.finish() |
| | 128 | |
| | 129 | class IphttpResource(twisted.web.resource.Resource): |
| | 130 | isLeaf = True |
| | 131 | def render_POST(self, request): |
| | 132 | # find client, update config, etc. |
| | 133 | metadata = request.args['m'] |
| | 134 | (ci_s, pw, tro) = metadata.split(b'\n')[0:3] |
| | 135 | ci = ipaddr(ci_s) |
| | 136 | cl = clients[ci] |
| | 137 | if pw != cl.pw: raise ValueError('bad password') |
| | 138 | |
| | 139 | if pw != cl.target_requests_outstanding: |
| | 140 | raise ... |
| | 141 | |
| | 142 | try: d = request.args['d'] |
| | 143 | except KeyError: d = '' |
| | 144 | |
| | 145 | cl.process_arriving_data(d) |
| | 146 | cl.new_request(request) |
| | 147 | |
| | 148 | def render_GET(self, request): |
| | 149 | return b'<html><body>hippotat</body></html>' |
| | 150 | |
| | 151 | def start_http(): |
| | 152 | resource = IphttpResource() |
| | 153 | site = twisted.web.server.Site(resource) |
| | 154 | for sa in c.saddrs: |
| | 155 | ep = sa.make_endpoint() |
| | 156 | crash_on_defer(ep.listen(site)) |
| | 157 | |
| | 158 | #---------- config and setup ---------- |
| | 159 | |
| | 160 | def process_cfg(): |
| | 161 | process_cfg_common_always() |
| | 162 | process_cfg_server() |
| | 163 | process_cfg_network() |
| | 164 | |
| | 165 | try: |
| | 166 | c.relay = cfg.get('virtual','relay') |
| | 167 | except NoOptionError: |
| | 168 | for search in c.network.hosts(): |
| | 169 | if search == c.server: continue |
| | 170 | c.relay = search |
| | 171 | break |
| | 172 | |
| | 173 | process_cfg_saddrs() |
| | 174 | process_cfg_clients(Client) |
| | 175 | |
| | 176 | process_cfg_ipif('server', |
| | 177 | (('local','server'), |
| | 178 | ('peer', 'relay'), |
| | 179 | ('rnets','network'))) |
| | 180 | |
| | 181 | common_startup() |
| | 182 | process_cfg() |
| | 183 | start_ipif(c.ipif_command, route) |
| | 184 | start_http() |
| | 185 | common_run() |
~mdw / hippotat / blame_incremental