Use new control socket of babeld to get routes

demo/demo

@@ -161,7 +161,8 @@ if 1:
         " -set_serial 0x120010db80042 -days %u" % CA_DAYS, shell=True)
     db_path = 'registry/registry.db'
     registry.screen('../re6st-registry @registry/re6st-registry.conf --db %s'
-        ' --mailhost %s -v%u' % (db_path, os.path.abspath('mbox'), VERBOSE))
+        ' --mailhost %s -v%u --control-socket registry/babeld.socket'
+        % (db_path, os.path.abspath('mbox'), VERBOSE))
     registry_url = 'http://%s/' % REGISTRY
     registry.Popen(('python', '-c', """if 1:
         import socket, time
@@ -194,8 +195,9 @@ if 1:
             p.communicate(str(token[0]))
             os.remove(dh_path)
             os.remove(folder + '/ca.crt')
-        node.screen('../re6stnet @%s/re6stnet.conf -v%u --registry %s %s'
-                    % (folder, VERBOSE, registry, args))
+        node.screen('../re6stnet @%s/re6stnet.conf -v%u --registry %s'
+                    ' --control-socket %s/babeld.socket'
+                    ' %s' % (folder, VERBOSE, registry, folder, args))
     re6stnet(registry, 'registry', '--ip ' + REGISTRY, registry='http://localhost/')
     re6stnet(machine1, 'm1', '-I%s' % m1_if_0.name)
     re6stnet(machine2, 'm2', '--remote-gateway 10.1.1.1', prefix_len=80)

re6st-registry

@@ -3,7 +3,7 @@ import httplib, logging, socket
 from BaseHTTPServer import BaseHTTPRequestHandler
 from SocketServer import ThreadingTCPServer
 from urlparse import parse_qsl
-from re6st import registry, utils
+from re6st import ctl, registry, utils
 
 # To generate server ca and key with serial for 2001:db8:42::/48
 #  openssl req -nodes -new -x509 -key ca.key -set_serial 0x120010db80042 -days 3650 -out ca.crt
@@ -80,6 +80,9 @@ def main():
     _('--anonymous-prefix-length', type=int,
             help="Length of allocated anonymous prefixes."
                  " If 0 or unset, registration by email is required")
+    _('--control-socket', metavar='CTL_SOCK', default=ctl.SOCK_PATH,
+        help="Socket path to use for communication between re6stnet and babeld"
+             " (option -R of Babel).")
     _('-l', '--logfile', default='/var/log/re6stnet/registry.log',
             help="Path to logging file.")
     _('-v', '--verbose', default=1, type=int,

re6st/ctl.py

+import logging, socket, struct
+from collections import namedtuple
+from . import utils
+
+SOCK_PATH = '/var/run/re6st-babeld.sock'
+
+uint16 = struct.Struct("!H")
+header = struct.Struct("!HI")
+
+class Struct(object):
+
+    def __init__(self, format, *args):
+        if args:
+            t = namedtuple(*args)
+        if isinstance(format, str):
+            s = struct.Struct("!" + format)
+            def encode(buffer, value):
+                buffer += s.pack(*value)
+            def decode(buffer, offset=0):
+                return offset + s.size, t(*s.unpack_from(buffer, offset))
+        else:
+            def encode(buffer, value):
+                for f, value in zip(format, value):
+                    f.encode(buffer, value)
+            def decode(buffer, offset=0):
+                r = []
+                for f in format:
+                    offset, x = f.decode(buffer, offset)
+                    r.append(x)
+                return offset, t(*r)
+        self.encode = encode
+        self.decode = decode
+
+class Array(object):
+
+    def __init__(self, item):
+        self._item = item
+
+    def encode(self, buffer, value):
+        buffer += uint16.pack(len(value))
+        encode = self._item.encode
+        for value in value:
+            encode(buffer, value)
+
+    def decode(self, buffer, offset=0):
+        r = []
+        o = offset + 2
+        decode = self._item.decode
+        for i in xrange(*uint16.unpack_from(buffer, offset)):
+            o, x = decode(buffer, o)
+            r.append(x)
+        return o, r
+
+class String(object):
+
+    @staticmethod
+    def encode(buffer, value):
+        buffer += value + "\0"
+
+    @staticmethod
+    def decode(buffer, offset=0):
+        i = buffer.index("\0", offset)
+        return i + 1, buffer[offset:i]
+
+
+class Buffer(object):
+
+    def __init__(self):
+        self._buf = bytearray()
+        self._r = self._w = 0
+
+
+    def __iadd__(self, value):
+        self._buf += value
+        return self
+
+    def __len__(self):
+        return len(self._buf)
+
+    def _seek(self, r):
+        n = len(self._buf)
+        if r < n:
+            self._r = r
+        else:
+            self._w -= n
+            del self._buf[:]
+            self._r = 0
+
+    # reading
+
+    @property
+    def ready(self):
+        return self._w <= len(self._buf)
+
+    def want(self, n):
+        self._w = self._r + n
+
+    def unpack_from(self, struct):
+        r = self._r
+        value = struct.unpack_from(self._buf, r)
+        self._seek(r + struct.size)
+        return value
+
+    def decode(self, decode):
+        r, value = decode(self._buf, self._r)
+        self._seek(r)
+        return value
+
+    try: # BBB: Python < 2.7.4 (http://bugs.python.org/issue10212)
+        uint16.unpack_from(bytearray(uint16.size))
+    except TypeError:
+        def unpack_from(self, struct):
+            r = self._r
+            x = r + struct.size
+            value = struct.unpack(buffer(self._buf)[r:x])
+            self._seek(x)
+            return value
+        def decode(self, decode):
+            r = self._r
+            size, value = decode(buffer(self._buf)[r:])
+            self._seek(r + size)
+            return value
+
+    # writing
+
+    def send(self, socket, *args):
+        r = self._r
+        self._seek(r + socket.send(self._buf[r:], *args))
+
+    def pack_into(self, struct, offset, *args):
+        struct.pack_into(self._buf, offset, *args)
+
+
+class Packet(object):
+
+    response_dict = {}
+
+    def __new__(cls, id, request, response=None):
+        if response:
+            cls.response_dict[id] = response.decode
+        if request:
+            def packet(*args):
+                self = object.__new__(cls)
+                self.id = id
+                self.args = args
+                self.request = request
+                return self
+            return packet
+
+    def write(self, buffer):
+        logging.trace('send %s%r', self.__class__.__name__,
+                                   (self.id,) + self.args)
+        offset = len(buffer)
+        buffer += '\0' * header.size
+        r = self.request
+        if isinstance(r, Struct):
+            r.encode(buffer, self.args)
+        else:
+            r.encode(buffer, *self.args)
+        buffer.pack_into(header, offset, self.id,
+                         len(buffer) - header.size - offset)
+
+
+Dump = Packet(1,
+  Struct("B"),
+  Struct((
+    Array(Struct((Struct("I", "index", "index"), String), "interface", "index name")),
+    Array(Struct("16sIHHHHHiHH", "neighbour", "address ifindex reach rxcost txcost rtt rttcost channel if_up")),
+    Array(Struct("16sBH", "xroute", "prefix plen metric")),
+    Array(Struct("16sBHHH8siiI16s16sB", "route", "prefix plen metric smoothed_metric refmetric id seqno age ifindex neigh_address nexthop flags")),
+    ), "dump", "interfaces neighbours xroutes routes"))
+
+
+class Babel(object):
+
+    _decode = None
+
+    def __init__(self, socket_path, handler, network):
+        self.network = network
+        self.write_buffer = Buffer()
+        self.read_buffer = Buffer()
+        self.read_buffer.want(header.size)
+        self.handler = handler
+        s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+        def select(*args):
+            try:
+                s.connect(socket_path)
+            except socket.error:
+                return
+            s.send("\1")
+            s.setblocking(0)
+            del self.request_dump, self.select
+            self.socket = s
+            return self.select(*args)
+        self.select = select
+        self.request_dump = lambda: self.handle_dump((), (), (), ())
+
+    def send(self, packet):
+        packet.write(self.write_buffer)
+
+    def select(self, r, w, t):
+        s = self.socket
+        r[s] = self._read
+        if self.write_buffer:
+            w[s] = self._write
+
+    def _read(self):
+        d = self.socket.recv(65536)
+        if not d:
+            raise RuntimeError("connection to babeld closed")
+        b = self.read_buffer
+        b += d
+        while b.ready:
+            if self._decode:
+                packet = b.decode(self._decode)
+                self._decode = None
+                b.want(header.size)
+                name = packet.__class__.__name__
+                logging.trace('recv %r', packet)
+                try:
+                    h = getattr(self, "handle_" + name)
+                except AttributeError:
+                    h = getattr(self.handler, "babel_" + name)
+                h(*packet)
+            else:
+                packet_type, size = b.unpack_from(header)
+                self._decode = Packet.response_dict[packet_type]
+                b.want(size)
+
+    def _write(self):
+        self.write_buffer.send(self.socket)
+
+    def request_dump(self):
+        self.send(Dump(11)) # interfaces + neighbours + installed routes
+
+    def handle_dump(self, interfaces, neighbours, xroutes, routes):
+        # neighbours = {neigh_prefix: (neighbour, {dst_prefix: route})}
+        n = dict(((n.address, n.ifindex), (n, {})) for n in neighbours)
+        unidentified = set(n)
+        self.neighbours = neighbours = {}
+        a = len(self.network)
+        for route in routes:
+            assert route.flags & 1, route # installed
+            assert route.neigh_address == route.nexthop, route
+            address = route.neigh_address, route.ifindex
+            neigh_routes = n[address]
+            ip = utils.binFromRawIp(route.prefix)
+            if ip[:a] == self.network:
+                prefix = ip[a:route.plen]
+                if prefix and not route.refmetric:
+                    neighbours[prefix] = neigh_routes
+                    unidentified.remove(address)
+            else:
+                prefix = None
+            neigh_routes[1][prefix] = route
+        if unidentified:
+            routes = {}
+            for address in unidentified:
+                routes.update(n[address][1])
+            if routes:
+                neighbours[None] = None, routes
+                logging.trace("Routes via unidentified neighbours. %r",
+                              neighbours)
+        self.interfaces = dict((i.index, name) for i, name in interfaces)
+        self.handler.babel_dump()

re6st/plib.py

@@ -62,7 +62,7 @@ def client(iface, address_list, encrypt, *args, **kw):
 
 
 def router(subnet, hello_interval, table, log_path, state_path, pidfile,
-           tunnel_interfaces, *args, **kw):
+           tunnel_interfaces, control_socket, *args, **kw):
     s = utils.ipFromBin(subnet)
     n = len(subnet)
     cmd = ['babeld',
@@ -80,6 +80,8 @@ def router(subnet, hello_interval, table, log_path, state_path, pidfile,
         cmd += '-t%u' % table, '-T%u' % table
     else:
         cmd[-2:-2] = '-C', 'redistribute ip ::/0 eq 0'
+    if control_socket:
+        cmd += '-R', '%s' % control_socket
     for iface in tunnel_interfaces:
         cmd += '-C', 'interface %s legacy-rxcost 5120' % iface
     cmd += args

re6st/registry.py

@@ -18,15 +18,16 @@ Authenticated communication:
   - the last one that was really used by the client (!hello)
   - the one of the last handshake (hello)
 """
-import base64, hmac, hashlib, httplib, inspect, logging, mailbox, os, random
-import select, smtplib, socket, sqlite3, string, struct, sys, threading, time
+import base64, hmac, hashlib, httplib, inspect, logging
+import mailbox, os, random, select, smtplib, socket, sqlite3
+import string, struct, sys, threading, time, weakref
 from collections import deque
 from datetime import datetime
 from BaseHTTPServer import HTTPServer, BaseHTTPRequestHandler
 from email.mime.text import MIMEText
 from OpenSSL import crypto
 from urllib import splittype, splithost, splitport, urlencode
-from . import tunnel, utils
+from . import ctl, tunnel, utils
 
 HMAC_HEADER = "Re6stHMAC"
 RENEW_PERIOD = 30 * 86400
@@ -88,11 +89,21 @@ class RegistryServer(object):
         logging.info("Network: %s/%u", utils.ipFromBin(self.network),
                                        len(self.network))
         self.email = self.ca.get_subject().emailAddress
+
+        self.peers_lock = threading.Lock()
+        l = threading.Lock()
+        l.acquire()
+        self.wait_dump = l.acquire
+        self.babel_dump = l.release
+        self.ctl = ctl.Babel(config.control_socket,
+            weakref.proxy(self), self.network)
+
         self.onTimeout()
 
     def select(self, r, w, t):
         if self.timeout:
             t.append((self.timeout, self.onTimeout))
+        self.ctl.select(r, w, t)
 
     def onTimeout(self):
         # XXX: Because we use threads to process requests, the statements
@@ -306,10 +317,16 @@ class RegistryServer(object):
 
     @rpc
     def getBootstrapPeer(self, cn):
-        with self.lock:
+        with self.peers_lock:
             age, peers = self.peers
             if age < time.time() or not peers:
-                peers = [x[1] for x in utils.iterRoutes(self.network)]
+                self.ctl.request_dump()
+                self.wait_dump()
+                peers = [prefix
+                    for neigh_routes in self.ctl.neighbours.itervalues()
+                    for prefix in neigh_routes[1]
+                    if prefix]
+                peers.append(self.prefix)
                 random.shuffle(peers)
                 self.peers = time.time() + 60, peers
             peer = peers.pop()
@@ -318,6 +335,7 @@ class RegistryServer(object):
                 # so don't bother looping over above code
                 # (in case 'peers' is empty).
                 peer = self.prefix
+        with self.lock:
             address = utils.ipFromBin(self.network + peer), tunnel.PORT
             self.sock.sendto('\2', address)
             start = time.time()

re6st/tunnel.py

-import logging, os, random, socket, subprocess, time
+import logging, os, random, socket, subprocess, time, weakref
 from collections import defaultdict, deque
-from . import plib, utils, version
+from . import ctl, plib, utils, version
 
 PORT = 326
 
@@ -39,7 +39,7 @@ class MultiGatewayManager(dict):
 
 class Connection(object):
 
-    _retry = routes = 0
+    _retry = 0
     time = float('inf')
 
     def __init__(self, tunnel_manager, address_list, iface, prefix):
@@ -104,10 +104,11 @@ class Connection(object):
 
 class TunnelManager(object):
 
-    def __init__(self, peer_db, openvpn_args, timeout,
+    def __init__(self, control_socket, peer_db, openvpn_args, timeout,
                 refresh, client_count, iface_list, network, prefix,
                 address, ip_changed, encrypt, remote_gateway, disable_proto,
                 neighbour_list=()):
+        self.ctl = ctl.Babel(control_socket, weakref.proxy(self), network)
         self.encrypt = encrypt
         self.ovpn_args = openvpn_args
         self.peer_db = peer_db
@@ -117,7 +118,7 @@ class TunnelManager(object):
         self._read_pipe = os.fdopen(r)
         self._connecting = set()
         self._connection_dict = {}
-        self._disconnected = None
+        self._disconnected = 0
         self._distant_peers = []
         self._iface_to_prefix = {}
         self._refresh_time = refresh
@@ -189,28 +190,33 @@ class TunnelManager(object):
     def select(self, r, w, t):
         r[self._read_pipe] = self.handleTunnelEvent
         r[self.sock] = self.handlePeerEvent
+        if self._next_refresh:
             t.append((self._next_refresh, self.refresh))
+        self.ctl.select(r, w, t)
 
     def refresh(self):
         logging.debug('Checking tunnels...')
         self._cleanDeads()
+        if self._next_tunnel_refresh < time.time() or \
+           self._makeNewTunnels(False):
+            self._next_refresh = None
+            self.ctl.request_dump() # calls babel_dump immediately at startup
+        else:
+            self._next_refresh = time.time() + 5
+
+    def babel_dump(self):
         remove = self._next_tunnel_refresh < time.time()
         if remove:
-            self._countRoutes()
             self._removeSomeTunnels()
             self.resetTunnelRefresh()
             self.peer_db.log()
-        self._makeNewTunnels(remove)
-        # XXX: Commented code is an attempt to clean up unused interfaces but
-        #      it is too aggressive. Sometimes _makeNewTunnels only asks address
-        #      (and the tunnel is created when we have an answer), so when the
-        #      maximum number of tunnels is reached, taps are recreated all the
-        #      time.
-        #      Also, babeld does not leave ipv6 membership for deleted taps,
+        self._makeNewTunnels(True)
+        # XXX: Commented code is an attempt to clean up unused interfaces
+        #      but babeld does not leave ipv6 membership for deleted taps,
         #      causing a memory leak in the kernel (capped by sysctl
         #      net.core.optmem_max), and after some time, new neighbours fail
         #      to see each other.
-        #if remove and self._free_iface_list:
+        #if remove and len(self._connecting) < len(self._free_iface_list):
         #    self._tuntap(self._free_iface_list.pop())
         self._next_refresh = time.time() + 5
 
@@ -220,7 +226,13 @@ class TunnelManager(object):
                 self._kill(prefix)
 
     def _tunnelScore(self, prefix):
-        n = self._connection_dict[prefix].routes
+        n = 0
+        try:
+            for x in self.ctl.neighbours[prefix][1]:
+                if x:
+                    n += 1
+        except KeyError:
+            pass
         return (prefix in self._neighbour_set, n) if n else ()
 
     def _removeSomeTunnels(self):
@@ -244,7 +256,6 @@ class TunnelManager(object):
                       int(prefix, 2), len(prefix))
 
     def _makeTunnel(self, prefix, address):
-        assert len(self._connection_dict) < self._client_count, (prefix, self.__dict__)
         if prefix in self._served or prefix in self._connection_dict:
             return False
         assert prefix != self._prefix, self.__dict__
@@ -264,40 +275,56 @@ class TunnelManager(object):
         c.open()
         return True
 
-    def _makeNewTunnels(self, route_counted):
+    def _makeNewTunnels(self, route_dumped):
         count = self._client_count - len(self._connection_dict)
         if not count:
             return
-        assert count >= 0
         # CAVEAT: Forget any peer that didn't reply to our previous address
         #         request, either because latency is too high or some packet
         #         was lost. However, this means that some time should pass
         #         before calling _makeNewTunnels again.
         self._connecting.clear()
         distant_peers = self._distant_peers
-        if len(distant_peers) < count and not route_counted:
-            self._countRoutes()
-        disconnected = self._disconnected
-        if disconnected is not None:
-            logging.info("No route to registry (%u neighbours, %u distant"
-                         " peers)", len(disconnected), len(distant_peers))
-            # We aren't the registry node and we have no tunnel to or from it,
-            # so it looks like we are not connected to the network, and our
-            # neighbours are in the same situation.
-            self._disconnected = None
-            disconnected = set(disconnected).union(distant_peers)
-            if disconnected:
-                # We do have neighbours that are probably also disconnected,
+        if len(distant_peers) < count or 0 < self._disconnected < time.time():
+            if not route_dumped:
+                return True
+            logging.debug('Analyze routes ...')
+            neighbours = self.ctl.neighbours
+            # Collect all nodes known by Babel
+            peers = set(prefix
+                for neigh_routes in neighbours.itervalues()
+                for prefix in neigh_routes[1]
+                if prefix)
+            # Keep only distant peers.
+            distant_peers[:] = peers.difference(neighbours)
+            # Check whether we're connected to the network.
+            registry = self.peer_db.registry_prefix
+            if (registry == self._prefix or registry in peers
+                                         or registry in self._connection_dict
+                                         or registry in self._served):
+                self._disconnected = 0
+            # Do not bootstrap too often, especially if we are several
+            # nodes to try.
+            elif self._disconnected < time.time():
+                logging.info("No route to registry (%u peers, %u distant)",
+                             len(peers), len(distant_peers))
+                self._disconnected = time.time() + self.timeout * (
+                    1 + random.randint(0, len(peers)))
+                distant_peers = None
+                if peers:
+                    # We aren't the only disconnected node
                     # so force rebootstrapping.
                     peer = self.peer_db.getBootstrapPeer()
                     if not peer:
                         # Registry dead ? Assume we're connected after all.
-                    disconnected = None
-                elif peer[0] not in disconnected:
-                    # Got a node that will probably help us rejoining the
-                    # network, so connect to it.
+                        distant_peers = self._distant_peers
+                    elif peer[0] not in peers:
+                        # Got a node that will probably help us rejoining
+                        # the network, so connect to it.
                         count -= self._makeTunnel(*peer)
-        if disconnected is None:
+                        if not count:
+                            return
+        if distant_peers:
             # Normal operation. Choose peers to connect to by looking at the
             # routing table.
             neighbour_set = self._neighbour_set.intersection(distant_peers)
@@ -306,36 +333,31 @@ class TunnelManager(object):
                     peer = neighbour_set.pop()
                     i = distant_peers.index(peer)
                 else:
-                    i = random.randrange(0, len(distant_peers))
+                    i = random.randrange(len(distant_peers))
                     peer = distant_peers[i]
                 distant_peers[i] = distant_peers[-1]
                 del distant_peers[-1]
                 address = self.peer_db.getAddress(peer)
                 if address:
                     count -= self._makeTunnel(peer, address)
-                else:
-                    ip = utils.ipFromBin(self._network + peer)
-                    try:
-                        self.sock.sendto('\2', (ip, PORT))
-                    except socket.error, e:
-                        logging.info('Failed to query %s (%s)', ip, e)
+                elif self.sendto(peer, '\2'):
                     self._connecting.add(peer)
                     count -= 1
-        elif count:
+        elif distant_peers is None:
             # No route/tunnel to registry, which usually happens when starting
             # up. Select peers from cache for which we have no route.
             new = 0
             bootstrap = True
             for peer, address in self.peer_db.getPeerList():
-                if peer not in disconnected:
-                    logging.info("Try to bootstrap using peer %u/%u",
-                                 int(peer, 2), len(peer))
+                if peer not in peers:
                     bootstrap = False
                     if self._makeTunnel(peer, address):
                         new += 1
                         if new == count:
                             return
-            if not (new or disconnected):
+            # The following condition on 'peers' is the same as above,
+            # when we asked the registry for a node to bootstrap.
+            if not (new or peers):
                 if bootstrap:
                     # Startup without any good address in the cache.
                     peer = self.peer_db.getBootstrapPeer()
@@ -347,41 +369,6 @@ class TunnelManager(object):
                     if self._makeTunnel(*peer):
                         break
 
-    def _countRoutes(self):
-        logging.debug('Starting to count the routes on each interface...')
-        del self._distant_peers[:]
-        for conn in self._connection_dict.itervalues():
-            conn.routes = 0
-        other = []
-        for iface, prefix in utils.iterRoutes(self._network, self._prefix):
-            assert iface != 'lo', (iface, prefix)
-            nexthop = self._iface_to_prefix.get(iface)
-            if nexthop:
-                self._connection_dict[nexthop].routes += 1
-            if prefix in self._served or prefix in self._connection_dict:
-                continue
-            if iface in self._iface_list:
-                other.append(prefix)
-            else:
-                self._distant_peers.append(prefix)
-        registry = self.peer_db.registry_prefix
-        if registry == self._prefix or any(registry in x for x in (
-              self._distant_peers, other, self._served, self._connection_dict)):
-            self._disconnected = None
-            # XXX: When there is no new peer to connect when looking at routes
-            #      coming from tunnels, we'd like to consider those discovered
-            #      from the LAN. However, we don't want to create tunnels to
-            #      nodes of the LAN so do nothing until we find a way to get
-            #      some information from Babel.
-            #if not self._distant_peers:
-            #    self._distant_peers = other
-        else:
-            self._disconnected = other
-        logging.debug("Routes counted: %u distant peers",
-                      len(self._distant_peers))
-        for c in self._connection_dict.itervalues():
-            logging.trace('- %s: %s', c.iface, c.routes)
-
     def killAll(self):
         for prefix in self._connection_dict.keys():
             self._kill(prefix)
@@ -431,6 +418,14 @@ class TunnelManager(object):
             if address:
                 self._address[family] = utils.dump_address(address)
 
+    def sendto(self, peer, msg):
+        ip = utils.ipFromBin(self._network + peer)
+        try:
+            return self.sock.sendto(msg, (ip, PORT))
+        except socket.error, e:
+            logging.info('Failed to send message to %s/%s (%s)',
+                         int(peer, 2), len(peer), e)
+
     def _sendto(self, to, msg):
         try:
             return self.sock.sendto(msg, to[:2])

re6st/utils.py

@@ -190,7 +190,10 @@ def makedirs(path):
             raise
 
 def binFromIp(ip):
-    ip1, ip2 = struct.unpack('>QQ', socket.inet_pton(socket.AF_INET6, ip))
+    return binFromRawIp(socket.inet_pton(socket.AF_INET6, ip))
+
+def binFromRawIp(ip):
+    ip1, ip2 = struct.unpack('>QQ', ip)
     return bin(ip1)[2:].rjust(64, '0') + bin(ip2)[2:].rjust(64, '0')
 
 
@@ -229,33 +232,6 @@ def binFromSubnet(subnet):
     p, l = subnet.split('/')
     return bin(int(p))[2:].rjust(int(l), '0')
 
-if 1:
-    def _iterRoutes():
-        with open('/proc/net/ipv6_route') as f:
-            routing_table = f.read()
-        for line in routing_table.splitlines():
-            line = line.split()
-            iface = line[-1]
-            if 0 < int(line[5], 16) < 1 << 31: # positive metric
-                yield (iface, bin(int(line[0], 16))[2:].rjust(128, '0'),
-                              int(line[1], 16))
-
-_iterRoutes.__doc__ = """Iterates over all routes
-
-    Amongst all returned routes starting with re6st prefix:
-    - one is the local one with our prefix
-    - any route with null prefix will be ignored
-    - other are reachable routes installed by babeld
-    """
-
-def iterRoutes(network, exclude_prefix=None):
-    a = len(network)
-    for iface, ip, prefix_len in _iterRoutes():
-        if ip[:a] == network:
-            prefix = ip[a:prefix_len]
-            if prefix and prefix != exclude_prefix:
-                yield iface, prefix
-
 def decrypt(key_path, data):
     p = Popen(('openssl', 'rsautl', '-decrypt', '-inkey', key_path),
               stdin=subprocess.PIPE, stdout=subprocess.PIPE)

re6stnet

@@ -3,7 +3,7 @@ import atexit, errno, logging, os, signal, socket
 import sqlite3, subprocess, sys, time, threading
 from collections import deque
 from OpenSSL import crypto
-from re6st import db, plib, tunnel, utils, version
+from re6st import ctl, db, plib, tunnel, utils, version
 from re6st.registry import RegistryClient, RENEW_PERIOD
 from re6st.utils import exit
 
@@ -60,6 +60,9 @@ def getConfig():
     _('--babel-pidfile', metavar='PID', default='/var/run/re6st-babeld.pid',
         help="Specify a file to write our process id to"
              " (option -I of Babel).")
+    _('--control-socket', metavar='CTL_SOCK', default=ctl.SOCK_PATH,
+        help="Socket path to use for communication between re6stnet and babeld"
+             " (option -R of Babel).")
     _('--hello', type=int, default=15,
         help="Hello interval in seconds, for both wired and wireless"
              " connections. OpenVPN ping-exit option is set to 4 times the"
@@ -303,8 +306,8 @@ def main():
             required('registry')
             peer_db = db.PeerDB(db_path, registry, config.key, network, prefix)
             cleanup.append(lambda: peer_db.cacheMinimize(config.client_count))
-            tunnel_manager = tunnel.TunnelManager(peer_db,
-                config.openvpn_args, timeout, config.tunnel_refresh,
+            tunnel_manager = tunnel.TunnelManager(config.control_socket,
+                peer_db, config.openvpn_args, timeout, config.tunnel_refresh,
                 config.client_count, config.iface_list, network, prefix,
                 address, ip_changed, config.encrypt, remote_gateway,
                 config.disable_proto, config.neighbour)
@@ -405,6 +408,7 @@ def main():
                 os.path.join(config.log, 'babeld.log'),
                 os.path.join(config.state, 'babeld.state'),
                 config.babel_pidfile, tunnel_interfaces,
+                config.control_socket,
                 *config.babel_args).stop)
             if config.up:
                 exit.release()