| #!/usr/bin/python |
| # Copyright 2014 Google Inc. All Rights Reserved. |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| # |
| # pylint:disable=invalid-name |
| """Wifi channel selection and roaming daemon.""" |
| |
| import collections |
| import errno |
| import gc |
| import json |
| import os |
| import os.path |
| import random |
| import re |
| import select |
| import signal |
| import socket |
| import string |
| import struct |
| import subprocess |
| import sys |
| import time |
| import autochannel |
| import clientinfo |
| import helpers |
| import log |
| import options |
| import wgdata |
| |
| try: |
| import monotime # pylint: disable=unused-import,g-import-not-at-top |
| except ImportError: |
| pass |
| try: |
| _gettime = time.monotonic |
| except AttributeError: |
| _gettime = time.time |
| |
| optspec = """ |
| waveguide [options...] |
| -- |
| high-power This high-powered AP takes priority over low-powered ones |
| tv-box The AP is a TV Box; other TV Boxes should avoid it |
| fake= Create a fake instance with the given MAC address |
| initial-scans= Number of immediate full channel scans at startup [1] |
| scan-interval= Seconds between full channel scan cycles (0 to disable) [0] |
| tx-interval= Seconds between state transmits (0 to disable) [15] |
| autochan-interval= Seconds between autochannel decisions (0 to disable) [300] |
| print-interval= Seconds between state printouts to log (0 to disable) [16] |
| D,debug Increase debug output level |
| status-dir= Directory to store status information [/tmp/waveguide] |
| watch-pid= Shut down if the given process pid disappears |
| auto-disable-threshold= Shut down if >= RSSI received from other AP [-30] |
| localhost Reject packets not from local IP address (for testing) |
| """ |
| |
| opt = None |
| |
| # TODO(apenwarr): not sure what's the right multicast address to use. |
| # MCAST_ADDRESS = '224.0.0.2' # "all routers" address |
| MCAST_ADDRESS = '239.255.0.1' # "administratively scoped" RFC2365 subnet |
| MCAST_PORT = 4442 |
| AP_LIST_FILE = [''] |
| PEER_AP_LIST_FILE = [''] |
| WIFIBLASTER_DIR = '/tmp/wifi/wifiblaster' |
| WIFIBLASTER_BIN = 'wifiblaster' |
| MACADDR_REGEX = r'([0-9a-fA-F]{2}:){5}[0-9a-fA-F]{2}' |
| IW_TIMEOUT_SECS = 15 |
| |
| _gettime_rand = random.randint(0, 1000000) |
| |
| |
| def gettime(): |
| # using gettime_rand means two local instances will have desynced |
| # local timers, which will show problems better in unit tests. The |
| # monotonic timestamp should never leak out of a given instance. |
| return _gettime() + _gettime_rand |
| |
| # Do not assign consensus_key directly; call UpdateConsensus() instead. |
| consensus_key = None |
| consensus_start = None |
| |
| |
| def BandForFreq(freq): |
| if freq / 100 == 24: |
| return '2.4' |
| elif freq / 1000 == 5: |
| return '5' |
| else: |
| raise ValueError('Frequency %d is not in any known band', freq) |
| |
| |
| def UpdateConsensus(new_uptime_ms, new_consensus_key): |
| """Update the consensus key based on received multicast packets.""" |
| global consensus_key, consensus_start |
| new_consensus_start = gettime() - new_uptime_ms / 1000.0 |
| if (consensus_start is None or (new_consensus_start < consensus_start and |
| consensus_key != new_consensus_key)): |
| consensus_key = new_consensus_key |
| consensus_start = new_consensus_start |
| |
| key_file = os.path.join(opt.status_dir, 'consensus_key') |
| helpers.WriteFileAtomic(key_file, consensus_key) |
| return True |
| |
| return False |
| |
| |
| freq_to_chan = {} # a mapping from wifi frequencies (MHz) to channel no. |
| chan_to_freq = {} # a mapping from channel no. to wifi frequency (MHz) |
| |
| |
| def TouchAliveFile(): |
| alive_file = os.path.join(opt.status_dir, 'alive') |
| with open(alive_file, 'a'): |
| os.utime(alive_file, None) |
| |
| |
| class MulticastSocket(object): |
| """A simple class for wrapping multicast send/receive activities.""" |
| |
| def __init__(self, hostport): |
| self.host, self.port = hostport |
| |
| # A multicast receiver needs to be bound to the right port and have |
| # IP_ADD_MEMBERSHIP, but it doesn't care about the remote address. |
| self.rsock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) |
| self.rsock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) |
| if hasattr(socket, 'SO_REUSEPORT'): # needed for MacOS |
| try: |
| self.rsock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1) |
| except socket.error as e: |
| if e.errno == errno.ENOPROTOOPT: |
| # some kernels don't support this even if python does |
| pass |
| else: |
| raise |
| self.rsock.bind(('', self.port)) |
| mreq = struct.pack('4sl', socket.inet_pton(socket.AF_INET, self.host), |
| socket.INADDR_ANY) |
| self.rsock.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq) |
| |
| # A multicast transmitter has an arbitrary local address but the remote |
| # address needs to be the multicast address:port. |
| self.wsock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) |
| self.wsock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, 2) |
| self.wsock.connect((self.host, self.port)) |
| self.wsock.shutdown(socket.SHUT_RD) |
| |
| def Send(self, data): |
| return self.wsock.send(data) |
| |
| def Recv(self): |
| return self.rsock.recvfrom(65536) |
| |
| |
| # TODO(apenwarr): write an async version of this. |
| # ...so that we can run several commands (eg. scan on multiple interfaces) |
| # in parallel while still processing packets. Preparation for that is |
| # why we use a callback instead of a simple return value. |
| def RunProc(callback, args, *xargs, **kwargs): |
| """Run the process in args and pass the results to callback. |
| |
| Adds a timeout to any 'iw' commands. See b/18996821. |
| |
| Args: |
| callback: The callback which receives the error code, stdout, and stderr of |
| the called process. |
| args: The args specifying the process to call. |
| *xargs: Arguments passed through to Popen. |
| **kwargs: Keyword arguments passed through to Popen. |
| """ |
| is_iw = args[0] == 'iw' |
| if is_iw: |
| kwargs['preexec_fn'] = os.setsid |
| p = subprocess.Popen(args, *xargs, |
| stdout=subprocess.PIPE, |
| stderr=subprocess.PIPE, **kwargs) |
| if is_iw: |
| signal.signal(signal.SIGALRM, lambda s, f: os.killpg(p.pid, signal.SIGKILL)) |
| signal.alarm(IW_TIMEOUT_SECS) |
| |
| stdout, stderr = p.communicate() |
| errcode = p.wait() |
| if is_iw: |
| signal.alarm(0) |
| callback(errcode, stdout, stderr) |
| |
| |
| def WriteFileIfMissing(filename, content): |
| if not os.path.exists(filename): |
| helpers.WriteFileAtomic(filename, content) |
| |
| |
| class WlanManager(object): |
| """A class representing one wifi interface on the local host. |
| |
| Args: |
| phyname (str): name of the phy, like phy0 |
| vdevname (str): name of the vdev, like wlan0 or wlan1_portal |
| high_power (bool): advertise the AP as high power |
| tv_box (bool): advertise the AP as a TV box |
| wifiblaster_controller(:obj:`WifiblasterController`): a shared |
| WifiblasterController to probe associating STAs |
| primary (bool): True if the primary AP on a radio, False otherwise. |
| If False, defers most functionality to the WlanManager for the primary AP |
| and logs associated stations only. |
| """ |
| |
| def __init__(self, phyname, vdevname, high_power, tv_box, |
| wifiblaster_controller, primary=True): |
| self.phyname = phyname |
| self.vdevname = vdevname |
| self.mac = '\0\0\0\0\0\0' |
| self.ssid = '' |
| self.flags = 0 |
| self.allowed_freqs = set() |
| if high_power: |
| self.flags |= wgdata.ApFlags.HighPower |
| if tv_box: |
| self.flags |= wgdata.ApFlags.TvBox |
| self.bss_list = {} |
| self.channel_survey_list = {} |
| self.assoc_list = {} |
| self.arp_list = {} |
| self.peer_list = {} |
| self.starttime = gettime() |
| self.mcast = MulticastSocket((MCAST_ADDRESS, MCAST_PORT)) |
| self.did_initial_scan = False |
| self.next_scan_time = None |
| self.scan_idx = -1 |
| self.last_survey = {} |
| self.self_signals = {} |
| self.ap_signals = {} |
| self.auto_disabled = None |
| self.autochan_2g = self.autochan_5g = self.autochan_free = 0 |
| self.wifiblaster_controller = wifiblaster_controller |
| self.primary = primary |
| helpers.Unlink(self.Filename('disabled')) |
| |
| def Filename(self, suffix): |
| return os.path.join(opt.status_dir, '%s.%s' % (self.vdevname, suffix)) |
| |
| def _LogPrefix(self): |
| return '%s(%s): ' % (self.vdevname, helpers.DecodeMAC(self.mac)) |
| |
| def Log(self, s, *args): |
| log.Log(self._LogPrefix() + s, *args) |
| |
| def Debug(self, s, *args): |
| log.Debug(self._LogPrefix() + s, *args) |
| |
| def Debug2(self, s, *args): |
| log.Debug2(self._LogPrefix() + s, *args) |
| |
| # TODO(apenwarr): when we have async subprocs, add those here |
| def GetReadFds(self): |
| if self.primary: |
| return [self.mcast.rsock] |
| else: |
| return [] |
| |
| def NextTimeout(self): |
| return self.next_scan_time |
| |
| def ReadReady(self): |
| """Call this when select.select() returns true on GetReadFds().""" |
| data, hostport = self.mcast.Recv() |
| if opt.localhost and hostport[0] != self.mcast.wsock.getsockname()[0]: |
| self.Debug('ignored packet not from localhost: %r', hostport) |
| return 0 |
| try: |
| p = wgdata.DecodePacket(data) |
| except wgdata.DecodeError as e: |
| self.Debug('recv: from %r: %s', hostport, e) |
| return 0 |
| else: |
| self.Debug('recv: from %r uptime=%d key=%r', hostport, p.me.uptime_ms, |
| p.me.consensus_key[:4]) |
| # the waveguide that has been running the longest gets to win the contest |
| # for what anonymization key to use. This prevents disruption in case |
| # devices come and go. |
| # TODO(apenwarr): make sure this doesn't accidentally undo key rotations. |
| # ...once we even do key rotations. |
| if UpdateConsensus(p.me.uptime_ms, p.me.consensus_key): |
| self.Log('new key: phy=%r vdev=%r mac=%r', self.phyname, self.vdevname, |
| helpers.DecodeMAC(self.mac)) |
| if p.me.mac == self.mac: |
| self.Debug('ignoring packet from self') |
| return 0 |
| if p.me.consensus_key != consensus_key: |
| self.Debug('ignoring peer due to key mismatch') |
| return 0 |
| if p.me.mac not in self.peer_list: |
| self.Log('added a peer: %s', helpers.DecodeMAC(p.me.mac)) |
| self.peer_list[p.me.mac] = p |
| self.MaybeAutoDisable() |
| return 1 |
| |
| def GetState(self): |
| """Return a wgdata.State() for this object.""" |
| me = wgdata.Me(now=time.time(), |
| uptime_ms=(gettime() - self.starttime) * 1000, |
| consensus_key=consensus_key, |
| mac=self.mac, |
| flags=self.flags) |
| seen_bss_list = self.bss_list.values() |
| channel_survey_list = self.channel_survey_list.values() |
| assoc_list = self.assoc_list.values() |
| arp_list = self.arp_list.values() |
| return wgdata.State(me=me, |
| seen_bss=seen_bss_list, |
| channel_survey=channel_survey_list, |
| assoc=assoc_list, |
| arp=arp_list) |
| |
| def SendUpdate(self): |
| """Constructs and sends a waveguide packet on the multicast interface.""" |
| state = self.GetState() |
| p = wgdata.EncodePacket(state) |
| self.Debug2('sending: %r', state) |
| self.Debug('sent %s: %r bytes', self.vdevname, self.mcast.Send(p)) |
| |
| def DoScans(self): |
| """Calls programs and reads files to obtain the current wifi status.""" |
| now = gettime() |
| if not self.did_initial_scan: |
| log.Log('startup on %s (initial_scans=%d).', self.vdevname, |
| opt.initial_scans) |
| self._ReadArpTable() |
| RunProc(callback=self._PhyResults, |
| args=['iw', 'phy', self.phyname, 'info']) |
| RunProc(callback=self._DevResults, |
| args=['iw', 'dev', self.vdevname, 'info']) |
| # channel scan more than once in case we miss hearing a beacon |
| for _ in range(opt.initial_scans): |
| if self.flags & wgdata.ApFlags.Can2G: |
| band = '2.4' |
| elif self.flags & wgdata.ApFlags.Can5G: |
| band = '5' |
| |
| RunProc( |
| callback=self._ScanResults, |
| args=['wifi', 'scan', '-b', band, '--scan-ap-force', |
| '--scan-passive']) |
| self.UpdateStationInfo() |
| self.next_scan_time = now |
| self.did_initial_scan = True |
| elif not self.allowed_freqs: |
| self.Log('%s: no allowed frequencies.', self.vdevname) |
| elif self.next_scan_time and now > self.next_scan_time: |
| self.scan_idx = (self.scan_idx + 1) % len(self.allowed_freqs) |
| scan_freq = list(sorted(self.allowed_freqs))[self.scan_idx] |
| self.Log('scanning %d MHz (%d/%d)', scan_freq, self.scan_idx + 1, |
| len(self.allowed_freqs)) |
| RunProc(callback=self._ScanResults, |
| args=['wifi', 'scan', '-b', BandForFreq(scan_freq), |
| '--scan-freq', str(scan_freq), '--scan-ap-force', |
| '--scan-passive']) |
| chan_interval = opt.scan_interval / len(self.allowed_freqs) |
| # Randomly fiddle with the timing to avoid permanent alignment with |
| # other nodes also doing scans. If we're perfectly aligned with |
| # another node, they might never see us in their periodic scan. |
| chan_interval = random.uniform(chan_interval * 0.5, chan_interval * 1.5) |
| self.next_scan_time += chan_interval |
| if not self.scan_idx: |
| log.WriteEventFile('%s.scanned' % self.vdevname) |
| if not opt.scan_interval: |
| self.next_scan_time = None |
| |
| def UpdateStationInfo(self): |
| # These change in the background, not as the result of a scan |
| if self.primary: |
| RunProc(callback=self._SurveyResults, |
| args=['iw', 'dev', self.vdevname, 'survey', 'dump']) |
| |
| RunProc(callback=self._AssocResults, |
| args=['iw', 'dev', self.vdevname, 'station', 'dump']) |
| |
| def WriteApListFile(self): |
| """Write out a file of known APs.""" |
| ap_list = [] |
| for peer in self.peer_list.itervalues(): |
| if peer.me.mac not in self.bss_list: |
| continue |
| bssid = helpers.DecodeMAC(peer.me.mac) |
| b = self.bss_list[peer.me.mac] |
| txt = 'bssid:%s|freq:%d|cap:0x%x|phy:%d|reg:%s|rssi:%s|last_seen:%d' |
| s = txt % (bssid, b.freq, b.cap, b.phy, b.reg, b.rssi, b.last_seen) |
| ap_list.append(s) |
| content = '\n'.join(ap_list) |
| if AP_LIST_FILE[0]: |
| filename = AP_LIST_FILE[0] + '.' + self.vdevname |
| helpers.WriteFileAtomic(filename, content) |
| |
| def WritePeerApInfoFile(self, peer_data): |
| """Writes files containing signal strength information. |
| |
| The files contain other access points' data about their peers; |
| these are named PeerAPs.{interface}. |
| |
| Args: |
| peer_data: address about each MAC. |
| """ |
| peer_ap_list = [] |
| for peer_mac_addr in peer_data: |
| for b in peer_data[peer_mac_addr]: |
| peer_ap = helpers.DecodeMAC(b.mac) |
| txt = ('peer:%s|bssid:%s|freq:%d|cap:0x%x|phy:%d|reg:%s|rssi:%s' |
| '|last_seen:%d|flags:0x%x') |
| if all(c in string.printable for c in b.reg): |
| reg = b.reg |
| else: |
| reg = '' |
| s = txt % (peer_mac_addr, peer_ap, b.freq, b.cap, b.phy, reg, b.rssi, |
| b.last_seen, b.flags) |
| peer_ap_list.append(s) |
| content = '\n'.join(peer_ap_list) |
| if PEER_AP_LIST_FILE[0]: |
| filename = PEER_AP_LIST_FILE[0] + '.' + self.vdevname |
| helpers.WriteFileAtomic(filename, content) |
| |
| def WriteJsonSignals(self): |
| """Writes set of files containing JSON formatted signal data. |
| |
| The files are about the signal strength of other access points |
| as seen by this access point (ap_signals) and the signal strength |
| of this access point as seen by other access points (self_signals). |
| These two files are in the signals_json directory. |
| """ |
| signal_dir = os.path.join(opt.status_dir, 'signals_json') |
| self_signals_file = os.path.join(signal_dir, 'self_signals') |
| ap_signals_file = os.path.join(signal_dir, 'ap_signals') |
| try: |
| os.makedirs(signal_dir) |
| except OSError as e: |
| if e.errno != errno.EEXIST: |
| raise |
| if self.self_signals: |
| helpers.WriteFileAtomic(self_signals_file, json.dumps(self.self_signals)) |
| if self.ap_signals: |
| helpers.WriteFileAtomic(ap_signals_file, json.dumps(self.ap_signals)) |
| |
| def ShouldAutoDisable(self): |
| """Returns MAC address of high-powered peer if we should auto disable.""" |
| if self.flags & wgdata.ApFlags.HighPower: |
| self.Debug('high-powered AP: never auto-disable') |
| return None |
| for peer in sorted(self.peer_list.values(), key=lambda p: p.me.mac): |
| self.Debug('considering auto disable: peer=%s', |
| helpers.DecodeMAC(peer.me.mac)) |
| if peer.me.mac not in self.bss_list: |
| self.Debug('--> peer no match') |
| else: |
| bss = self.bss_list[peer.me.mac] |
| peer_age_secs = time.time() - peer.me.now |
| scan_age_secs = time.time() - bss.last_seen |
| peer_power = peer.me.flags & wgdata.ApFlags.HighPower |
| # TODO(apenwarr): overlap should consider only our *current* band. |
| # This isn't too important right away since high powered APs |
| # are on all bands simultaneously anyway. |
| overlap = self.flags & peer.me.flags & wgdata.ApFlags.Can_Mask |
| self.Debug('--> peer matches! p_age=%.3f s_age=%.3f power=0x%x ' |
| 'band_overlap=0x%02x', peer_age_secs, scan_age_secs, |
| peer_power, overlap) |
| if bss.rssi <= opt.auto_disable_threshold: |
| self.Debug('--> peer is far away, keep going.') |
| elif not peer_power: |
| self.Debug('--> peer is not high-power, keep going.') |
| elif not overlap: |
| self.Debug('--> peer does not overlap our band, keep going.') |
| elif (peer_age_secs > opt.tx_interval * 4 or |
| (opt.scan_interval and scan_age_secs > opt.scan_interval * 4)): |
| self.Debug('--> peer is too old, keep going.') |
| else: |
| self.Debug('--> peer overwhelms us, shut down.') |
| return peer.me.mac |
| return None |
| |
| def MaybeAutoDisable(self): |
| """Writes/removes the auto-disable file based on ShouldAutoDisable().""" |
| ad = self.ShouldAutoDisable() |
| if ad and self.auto_disabled != ad: |
| self.Log('auto-disabling because of %s', helpers.DecodeMAC(ad)) |
| helpers.WriteFileAtomic(self.Filename('disabled'), helpers.DecodeMAC(ad)) |
| elif self.auto_disabled and not ad: |
| self.Log('auto-enabling because %s disappeared', |
| helpers.DecodeMAC(self.auto_disabled)) |
| helpers.Unlink(self.Filename('disabled')) |
| self.auto_disabled = ad |
| |
| def _ChooseChannel(self, state, candidates, hysteresis_freq): |
| """Recommend a wifi channel for a particular set of constraints.""" |
| spreading = helpers.Experiment('WifiPrimarySpreading') |
| combos = autochannel.LegalCombos(self.allowed_freqs, candidates) |
| use_active_time = helpers.Experiment('WifiUseActiveTime') |
| cc = autochannel.SoloChooseChannel(state, |
| candidates=combos, |
| use_primary_spreading=spreading, |
| use_active_time=use_active_time, |
| hysteresis_freq=hysteresis_freq) |
| self.Log('%s', cc) |
| return cc.primary_freq |
| |
| def ChooseChannel(self): |
| """Recommend a wifi channel for this device.""" |
| freqs = list(sorted(self.allowed_freqs)) |
| self.Log('Freqs: %s', ' '.join(str(f) for f in freqs)) |
| |
| apc = '' |
| for freq in freqs: |
| apc += '%s ' % len([bss for bss in self.bss_list.values() |
| if bss.freq == freq]) |
| self.Log('APcounts: %s', apc) |
| busy = '' |
| |
| for freq in freqs: |
| cs = self.channel_survey_list.get(freq, None) |
| if cs: |
| frac = cs.busy_ms * 100 / (cs.observed_ms + 1) |
| busy += '%s%d ' % ( |
| ('*' |
| if cs.observed_ms < autochannel.AIRTIME_THRESHOLD_MS else ''), frac |
| ) |
| else: |
| busy += '*0 ' |
| self.Log('Busy%%: %s', busy) |
| |
| state = self.GetState() |
| |
| candidates_free = [] |
| if self.flags & wgdata.ApFlags.Can2G: |
| if helpers.Experiment('WifiChannelsLimited2G'): |
| candidates2g = autochannel.C_24MAIN |
| else: |
| candidates2g = autochannel.C_24ANY |
| candidates_free += candidates2g |
| self.autochan_2g = self._ChooseChannel( |
| state, candidates2g, self.autochan_2g) |
| WriteFileIfMissing(self.Filename('autochan_2g.init'), |
| str(self.autochan_2g)) |
| helpers.WriteFileAtomic(self.Filename('autochan_2g'), |
| str(self.autochan_2g)) |
| if self.flags & wgdata.ApFlags.Can5G: |
| candidates5g = [] |
| if helpers.Experiment('WifiLowIsHigh'): |
| # WifiLowIsHigh means to treat low-powered channels as part of the |
| # high-powered category. Newer FCC rules allow high power |
| # transmission on the previously low-powered channels, but not all |
| # devices support it. |
| candidates5g += autochannel.C_5LOW + autochannel.C_5HIGH |
| elif opt.high_power: |
| candidates5g += autochannel.C_5HIGH |
| else: |
| candidates5g += autochannel.C_5LOW |
| if helpers.Experiment('WifiUseDFS'): |
| candidates5g += autochannel.C_5DFS |
| candidates_free += candidates5g |
| self.autochan_5g = self._ChooseChannel( |
| state, candidates5g, self.autochan_5g) |
| WriteFileIfMissing(self.Filename('autochan_5g.init'), |
| str(self.autochan_5g)) |
| helpers.WriteFileAtomic(self.Filename('autochan_5g'), |
| str(self.autochan_5g)) |
| self.autochan_free = self._ChooseChannel( |
| state, candidates_free, self.autochan_free) |
| WriteFileIfMissing(self.Filename('autochan_free.init'), |
| str(self.autochan_free)) |
| helpers.WriteFileAtomic(self.Filename('autochan_free'), |
| str(self.autochan_free)) |
| self.Log('Recommended freqs: %d %d -> %d', self.autochan_2g, |
| self.autochan_5g, self.autochan_free) |
| log.WriteEventFile('autochan_done') |
| |
| def _ReadArpTable(self): |
| """Reads the kernel's ARP entries.""" |
| now = time.time() |
| try: |
| f = open('/proc/net/arp', 'r', 64 * 1024) |
| except IOError as e: |
| self.Log('arp table missing: %s', e) |
| return |
| data = f.read(64 * 1024) |
| lines = data.split('\n')[1:] # skip header line |
| for line in lines: |
| g = re.match(r'(\d+\.\d+\.\d+\.\d+)\s+.*\s+' |
| r'(([0-9a-fA-F]{2}:){5}[0-9a-fA-F]{2})', line) |
| if g: |
| ip = helpers.EncodeIP(g.group(1)) |
| mac = helpers.EncodeMAC(g.group(2)) |
| self.arp_list[mac] = wgdata.ARP(ip=ip, mac=mac, last_seen=now) |
| self.Debug('arp %r', self.arp_list[mac]) |
| |
| def _PhyResults(self, errcode, stdout, stderr): |
| """Callback for 'iw phy xxx info' results.""" |
| self.Debug('phy %r err:%r stdout:%r stderr:%r', self.phyname, errcode, |
| stdout[:70], stderr) |
| if errcode: return |
| for line in stdout.split('\n'): |
| line = line.strip() |
| g = re.match(r'\* (\d+) MHz \[(\d+)\] \((.*)\)', line) |
| if g: |
| freq = int(g.group(1)) |
| chan = int(g.group(2)) |
| disabled = (g.group(3) == 'disabled') |
| self.Debug('phy freq=%d chan=%d disabled=%d', freq, chan, disabled) |
| if not disabled: |
| band = BandForFreq(freq) |
| if band == '2.4': |
| self.flags |= wgdata.ApFlags.Can2G |
| elif band == '5': |
| self.flags |= wgdata.ApFlags.Can5G |
| self.allowed_freqs.add(freq) |
| freq_to_chan[freq] = chan |
| chan_to_freq[chan] = freq |
| |
| def _DevResults(self, errcode, stdout, stderr): |
| """Callback for 'iw dev xxx info' results.""" |
| self.Debug('dev err:%r stdout:%r stderr:%r', errcode, stdout[:70], stderr) |
| if errcode: return |
| for line in stdout.split('\n'): |
| line = line.strip() |
| g = re.match(r'addr (([0-9a-fA-F]{2}:){5}[0-9a-fA-F]{2})', line) |
| if g: |
| self.mac = helpers.EncodeMAC(g.group(1)) |
| continue |
| g = re.match(r'ssid (.*)', line) |
| if g: |
| self.ssid = g.group(1) |
| |
| def _ScanResults(self, errcode, stdout, stderr): |
| """Callback for 'iw scan' results.""" |
| self.Debug('scan err:%r stdout:%r stderr:%r', errcode, stdout[:70], stderr) |
| if errcode: return |
| now = time.time() |
| mac = freq = rssi = last_seen = None |
| reg = '' |
| flags = cap = phy = 0 |
| |
| def AddEntry(): |
| if mac: |
| is_ours = False # TODO(apenwarr): calc from received waveguide packets |
| bss = wgdata.BSS(is_ours=is_ours, |
| freq=freq, |
| mac=mac, |
| rssi=rssi, |
| flags=flags, |
| last_seen=last_seen, |
| cap=cap, |
| phy=phy, |
| reg=reg) |
| if mac not in self.bss_list: |
| self.Debug('Added: %r', bss) |
| self.bss_list[mac] = bss |
| |
| for line in stdout.split('\n'): |
| line = line.strip() |
| g = re.match(r'BSS (([0-9a-fA-F]{2}:){5}[0-9a-fA-F]{2})', line) |
| if g: |
| AddEntry() |
| mac = freq = rssi = last_seen = None |
| reg = '' |
| flags = cap = phy = 0 |
| mac = helpers.EncodeMAC(g.group(1)) |
| g = re.match(r'freq: (\d+)', line) |
| if g: |
| freq = int(g.group(1)) |
| g = re.match(r'signal: ([-\d.]+) dBm', line) |
| if g: |
| rssi = float(g.group(1)) |
| g = re.match(r'last seen: (\d+) ms ago', line) |
| if g: |
| last_seen = now - float(g.group(1)) / 1000 |
| g = re.match(r'capability: .* \((\S+)\)', line) |
| if g: |
| cap = int(g.group(1), 0) |
| g = re.match(r'HT capabilities:', line) |
| if g: |
| phy = max(phy, 7) # dot11_phy_type_ht = 7 |
| g = re.match(r'VHT capabilities:', line) |
| if g: |
| phy = max(phy, 8) # dot11_phy_type_vht = 8 |
| g = re.match(r'Country: (\S\S) ', line) |
| if g: |
| reg = str(g.group(1)) |
| AddEntry() |
| self.MaybeAutoDisable() |
| self.WriteApListFile() |
| |
| def _SurveyResults(self, errcode, stdout, stderr): |
| """Callback for 'iw survey dump' results.""" |
| self.Debug('survey err:%r stdout:%r stderr:%r', errcode, stdout[:70], |
| stderr) |
| if errcode: return |
| freq = None |
| noise = active_ms = busy_ms = rx_ms = tx_ms = 0 |
| |
| def AddEntry(): |
| if freq: |
| # TODO(apenwarr): ath9k: rx_ms includes all airtime, not just ours. |
| # tx_ms is only time *we* were transmitting, so it doesn't count |
| # toward the busy level of the channel for decision making |
| # purposes. We'd also like to forget time spent receiving from |
| # our stations, but rx_ms includes that *plus* all time spent |
| # receiving packets from anyone, unfortunately. I don't know |
| # the difference between rx_ms and busy_ms, but they seem to differ |
| # only by a small percentage usually. |
| # TODO(apenwarr): ath10k: busy_ms is missing entirely. |
| # And it looks like active_ms is filled with what should be |
| # busy_ms, which means we have no idea what fraction of time it |
| # was active. The code below will treat all channels as 0. |
| real_busy_ms = busy_ms - tx_ms |
| if real_busy_ms < 0: real_busy_ms = 0 |
| current = (active_ms, busy_ms, rx_ms, tx_ms) |
| if current != self.last_survey.get(freq, None): |
| oldch = self.channel_survey_list.get(freq, None) |
| # 'iw survey dump' results are single readings, which we want to |
| # accumulate over time. |
| # |
| # TODO(apenwarr): change iw to only clear counters when asked. |
| # Right now it zeroes one channel of data whenever you rescan |
| # that one channel, which leaves us to do this error-prone |
| # accumulation by hand later. |
| # |
| # The current channel will be active for >100ms, and other channels |
| # will be ~50-100ms (because they record only the most recent |
| # offchannel event). So we add a margin of safety, and accumulate |
| # for values <250ms, but *replace* for values >250ms. |
| if oldch and active_ms < 250: |
| old_observed, old_busy = oldch.observed_ms, oldch.busy_ms |
| else: |
| old_observed, old_busy = 0, 0 |
| ch = wgdata.Channel(freq=freq, |
| noise_dbm=noise, |
| observed_ms=old_observed + active_ms, |
| busy_ms=old_busy + real_busy_ms) |
| if freq not in self.channel_survey_list: |
| self.Debug('Added: %r', ch) |
| self.channel_survey_list[freq] = ch |
| # TODO(apenwarr): persist the survey results across reboots? |
| # The channel usage stats are probably most useful over a long |
| # time period. On the other hand, if the device reboots, maybe |
| # the environment will be different when it comes back. |
| self.last_survey[freq] = current |
| |
| for line in stdout.split('\n'): |
| line = line.strip() |
| g = re.match(r'Survey data from', line) |
| if g: |
| AddEntry() |
| freq = None |
| noise = active_ms = busy_ms = rx_ms = tx_ms = 0 |
| g = re.match(r'frequency:\s+(\d+) MHz', line) |
| if g: |
| freq = int(g.group(1)) |
| g = re.match(r'noise:\s+([-.\d]+) dBm', line) |
| if g: |
| noise = float(g.group(1)) |
| g = re.match(r'channel active time:\s+([-\d.]+) ms', line) |
| if g: |
| active_ms = float(g.group(1)) |
| g = re.match(r'channel busy time:\s+([-\d.]+) ms', line) |
| if g: |
| busy_ms = float(g.group(1)) |
| g = re.match(r'channel receive time:\s+([-\d.]+) ms', line) |
| if g: |
| rx_ms = float(g.group(1)) |
| g = re.match(r'channel transmit time:\s+([-\d.]+) ms', line) |
| if g: |
| tx_ms = float(g.group(1)) |
| AddEntry() |
| |
| def _AssocResults(self, errcode, stdout, stderr): |
| """Callback for 'iw station dump' results.""" |
| self.Debug('assoc err:%r stdout:%r stderr:%r', errcode, stdout[:70], stderr) |
| if errcode: return |
| now = time.time() |
| assoc_list = {} |
| mac = None |
| rssi = 0 |
| last_seen = now |
| can5G = None |
| |
| def AddEntry(): |
| if mac: |
| a = wgdata.Assoc(mac=mac, rssi=rssi, last_seen=last_seen, can5G=can5G) |
| if mac not in self.assoc_list: |
| self.Debug('Added: %r', a) |
| self.wifiblaster_controller.MeasureOnAssociation(self.vdevname, mac) |
| assoc_list[mac] = a |
| |
| for line in stdout.split('\n'): |
| line = line.strip() |
| g = re.match(r'Station (([0-9a-fA-F]{2}:){5}[0-9a-fA-F]{2})', line) |
| if g: |
| AddEntry() |
| unencoded_mac = g.group(1) |
| mac = helpers.EncodeMAC(unencoded_mac) |
| rssi = 0 |
| last_seen = now |
| can5G = self._AssocCan5G(unencoded_mac) |
| g = re.match(r'inactive time:\s+([-.\d]+) ms', line) |
| if g: |
| last_seen = now - float(g.group(1)) / 1000 |
| g = re.match(r'signal:\s+([-.\d]+) .*dBm', line) |
| if g: |
| rssi = float(g.group(1)) |
| AddEntry() |
| self.assoc_list = assoc_list |
| |
| def _AssocCan5G(self, mac): |
| """Check whether a station supports 5GHz. |
| |
| Args: |
| mac: The (unencoded) MAC address of the station. |
| |
| Returns: |
| Whether the associated station supports 5GHz. |
| """ |
| # If the station is associated with a 5GHz-only radio, then it supports |
| # 5Ghz. |
| if not self.flags & wgdata.ApFlags.Can2G: |
| return True |
| |
| # If the station is associated with the 2.4GHz radio, check to see whether |
| # hostapd determined it was 5GHz-capable (i.e. bandsteering failed). See |
| # hostap/src/ap/steering.h for details on the filename format, and /bin/wifi |
| # for the location of the file. |
| mac = ''.join(mac.split(':')) |
| if os.path.exists('/tmp/wifi/steering/2.4/%s.2' % mac): |
| return True |
| |
| # If the station is associated with the 2.4GHz radio and bandsteering wasn't |
| # attempted, the station only supports 2.4GHz. |
| return False |
| |
| |
| def CreateManagers(managers, high_power, tv_box, wifiblaster_controller): |
| """Create WlanManager() objects, one per wifi interface.""" |
| |
| def ParseDevList(errcode, stdout, stderr): |
| """Callback for 'iw dev' results.""" |
| if errcode: |
| raise Exception('failed (%d) getting wifi dev list: %r' % |
| (errcode, stderr)) |
| phy = dev = devtype = None |
| phy_devs = collections.defaultdict(list) |
| |
| def AddEntry(): |
| if phy and dev: |
| if devtype == 'AP': |
| phy_devs[phy].append(dev) |
| else: |
| log.Debug('Skipping dev %r because type %r != AP', dev, devtype) |
| |
| for line in stdout.split('\n'): |
| line = line.strip() |
| g = re.match(r'phy#(\d+)', line) |
| if g: |
| # A new phy |
| AddEntry() |
| phy = 'phy%s' % g.group(1) |
| dev = devtype = None |
| g = re.match(r'Interface ([_a-zA-Z0-9.]+)', line) |
| if g: |
| # A new interface inside this phy |
| AddEntry() |
| dev = g.group(1) |
| devtype = None |
| g = re.match(r'type (\w+)', line) |
| if g: |
| devtype = g.group(1) |
| AddEntry() |
| |
| existing_devs = dict((m.vdevname, m) for m in managers) |
| new_devs = set() |
| |
| for phy, devs in phy_devs.items(): |
| new_devs.update(devs) |
| |
| # We only want one full-fledged vdev per PHY. Special-purpose vdevs are |
| # probably the same name with an extension, so treat the vdev with the |
| # shortest name as the full-fledged one. |
| devs.sort(key=lambda dev: (len(dev), dev)) |
| for i, dev in enumerate(devs): |
| primary = i == 0 |
| if dev not in existing_devs: |
| log.Debug('Creating wlan manager for (%r, %r)', phy, dev) |
| managers.append( |
| WlanManager(phy, dev, high_power=high_power, tv_box=tv_box, |
| wifiblaster_controller=wifiblaster_controller, |
| primary=primary)) |
| |
| for dev, m in existing_devs.iteritems(): |
| if dev not in new_devs: |
| log.Log('Forgetting interface %r.', dev) |
| managers.remove(m) |
| |
| RunProc(callback=ParseDevList, args=['iw', 'dev']) |
| |
| |
| class WifiblasterController(object): |
| """WiFi performance measurement using wifiblaster. |
| |
| There are two modes: automated and triggered. |
| |
| In automated mode, WifiblasterController measures random clients at random |
| times as governed by a Poisson process with rate = 1 / interval. Thus, |
| measurements are distributed uniformly over time, and every point in time is |
| equally likely to be measured. The average number of measurements in any given |
| window of W seconds is W / interval. |
| |
| In triggered mode, WifiblasterController immediately measures the requested |
| client. |
| |
| WifiblasterController reads parameters from files: |
| |
| - Scheduling parameters |
| |
| wifiblaster.enable Enable WiFi performance measurement. |
| wifiblaster.interval Average time between automated measurements in |
| seconds, or 0 to disable automated measurements. |
| wifiblaster.measureall Unix time at which to measure all clients, or 0 |
| to disable measureall requests. |
| wifiblaster.onassociation Enable WiFi performance measurement after clients |
| associate. |
| |
| - Measurement parameters |
| |
| wifiblaster.duration Measurement duration in seconds. |
| wifiblaster.fraction Number of samples per measurement. |
| wifiblaster.size Packet size in bytes. |
| """ |
| |
| def __init__(self, managers, basedir): |
| """Initializes WifiblasterController.""" |
| self._managers = managers |
| self._basedir = basedir |
| self._interval = 0 # Disabled. |
| self._next_measurement_time = float('inf') |
| self._last_measureall_time = 0 |
| self._next_timeout = 0 |
| |
| def _ReadParameter(self, name, typecast): |
| """Returns a parameter value read from a file.""" |
| try: |
| s = open(os.path.join(self._basedir, 'wifiblaster.%s' % name)).read() |
| except IOError: |
| return None |
| try: |
| return typecast(s) |
| except ValueError: |
| return None |
| |
| def _GetParameters(self): |
| """Reads and returns all parameters if valid, or Nones.""" |
| duration = self._ReadParameter('duration', float) |
| enable = self._ReadParameter('enable', self._StrToBool) |
| fraction = self._ReadParameter('fraction', int) |
| interval = self._ReadParameter('interval', float) |
| measureall = self._ReadParameter('measureall', float) |
| onassociation = self._ReadParameter('onassociation', self._StrToBool) |
| size = self._ReadParameter('size', int) |
| if (duration > 0 and enable and fraction > 0 and interval >= 0 |
| and measureall >= 0 and size > 0): |
| return (duration, fraction, interval, measureall, onassociation, size) |
| return (None, None, None, None, None, None) |
| |
| def _SaveResult(self, line): |
| """Save wifiblaster result to the status file for that client.""" |
| g = re.search(MACADDR_REGEX, line) |
| if g: |
| helpers.WriteFileAtomic(os.path.join(WIFIBLASTER_DIR, g.group()), |
| '%d %s' % (time.time(), line)) |
| |
| def _HandleResults(self, errcode, stdout, stderr): |
| """Callback for 'wifiblaster' results.""" |
| log.Debug('wifiblaster err:%r stdout:%r stderr:%r', errcode, stdout[:70], |
| stderr) |
| for line in stdout.splitlines(): |
| log.Log('wifiblaster: %s' % line) |
| self._SaveResult(line) |
| |
| def _StrToBool(self, s): |
| """Returns True if a string expresses a true value.""" |
| return s.rstrip().lower() in ('true', '1') |
| |
| def _GetAllClients(self): |
| """Returns all associated clients.""" |
| return [(manager.vdevname, assoc.mac) |
| for manager in self._managers for assoc in manager.GetState().assoc] |
| |
| def NextTimeout(self): |
| """Returns the time of the next event.""" |
| return self._next_timeout |
| |
| def NextMeasurement(self): |
| """Return the time of the next measurement event.""" |
| return self._next_measurement_time |
| |
| def Measure(self, interface, client, duration, fraction, size): |
| """Measures the performance of a client.""" |
| RunProc(callback=self._HandleResults, |
| args=[WIFIBLASTER_BIN, '-i', interface, '-d', str(duration), |
| '-f', str(fraction), '-s', str(size), |
| helpers.DecodeMAC(client)]) |
| |
| def MeasureOnAssociation(self, interface, client): |
| """Measures the performance of a client after association.""" |
| (duration, fraction, _, _, onassociation, size) = self._GetParameters() |
| if onassociation: |
| self.Measure(interface, client, duration, fraction, size) |
| |
| def Poll(self, now): |
| """Polls the state machine.""" |
| |
| def Disable(): |
| self._interval = 0 |
| self._next_measurement_time = float('inf') |
| |
| def StartMeasurementTimer(interval): |
| self._interval = interval |
| # Inter-arrival times in a Poisson process are exponentially distributed. |
| # The timebase slip prevents a burst of measurements in case we fall |
| # behind. |
| self._next_measurement_time = now + random.expovariate(1.0 / interval) |
| |
| # Read parameters. |
| (duration, fraction, interval, measureall, _, size) = self._GetParameters() |
| |
| # Handle automated mode. |
| if interval > 0: |
| if self._interval != interval: |
| # Enable or change interval. |
| StartMeasurementTimer(interval) |
| elif now >= self._next_measurement_time: |
| # Measure a random client. |
| StartMeasurementTimer(interval) |
| try: |
| (interface, client) = random.choice(self._GetAllClients()) |
| except IndexError: |
| pass |
| else: |
| self.Measure(interface, client, duration, fraction, size) |
| else: |
| Disable() |
| |
| # Handle measureall request. |
| if time.time() >= measureall and measureall > self._last_measureall_time: |
| self._last_measureall_time = measureall |
| for (interface, client) in self._GetAllClients(): |
| self.Measure(interface, client, duration, fraction, size) |
| |
| # Poll again in at most one second. This allows parameter changes (e.g. a |
| # measureall request or a long interval to a short interval) to take effect |
| # sooner than the next scheduled measurement. |
| self._next_timeout = min(now + 1, self._next_measurement_time) |
| |
| |
| def do_ssids_match(managers): |
| """Check whether the same primary interface name is used on both PHYs. |
| |
| Assumes the primary interface is the shortest one, since secondary interface |
| names probably use the primary as a prefix. |
| |
| Args: |
| managers: A list of WlanManagers. |
| |
| Returns: |
| Returns true iff the same primary interface name is used on both PHYs. |
| """ |
| phy_ssids = {} |
| for m in managers: |
| if (m.ssid and (m.phyname not in phy_ssids or |
| len(m.ssid) < len(phy_ssids[m.phyname]))): |
| phy_ssids[m.phyname] = m.ssid |
| |
| ssids = phy_ssids.values() |
| return len(ssids) == 2 and ssids[0] == ssids[1] |
| |
| |
| def main(): |
| gc.set_debug(gc.DEBUG_STATS | |
| gc.DEBUG_COLLECTABLE | |
| gc.DEBUG_UNCOLLECTABLE | |
| gc.DEBUG_INSTANCES | |
| gc.DEBUG_OBJECTS) |
| |
| global opt |
| o = options.Options(optspec) |
| opt, flags, unused_extra = o.parse(sys.argv[1:]) |
| if helpers.Experiment('WifiUseActiveTime'): |
| opt.initial_scans = max(opt.initial_scans, 5) |
| opt.scan_interval = float(opt.scan_interval) |
| opt.tx_interval = float(opt.tx_interval) |
| opt.autochan_interval = float(opt.autochan_interval) |
| opt.print_interval = float(opt.print_interval) |
| if opt.watch_pid and opt.watch_pid <= 1: |
| o.fatal('--watch-pid must be empty or > 1') |
| log.LOGLEVEL = opt.debug |
| log.STATUS_DIR = opt.status_dir |
| |
| try: |
| os.makedirs(opt.status_dir) |
| except OSError as e: |
| if e.errno != errno.EEXIST: |
| raise |
| |
| try: |
| os.makedirs(WIFIBLASTER_DIR) |
| except OSError as e: |
| if e.errno != errno.EEXIST: |
| raise |
| |
| AP_LIST_FILE[0] = os.path.join(opt.status_dir, 'APs') |
| PEER_AP_LIST_FILE[0] = os.path.join(opt.status_dir, 'PeerAPs') |
| |
| # Seed the consensus key with random data. |
| UpdateConsensus(0, os.urandom(16)) |
| managers = [] |
| wifiblaster_controller = WifiblasterController(managers, opt.status_dir) |
| if opt.fake: |
| for k, fakemac in flags: |
| if k == '--fake': |
| # Name the fake phy/mac devices after the fake MAC address, but |
| # skip the first bit of the MAC to make it less obnoxiously long. |
| # The remainder should generally be enough to uniquely identify |
| # them. |
| wlm = WlanManager(phyname='phy-%s' % fakemac[12:], |
| vdevname='wlan-%s' % fakemac[12:], |
| high_power=opt.high_power, |
| tv_box=opt.tv_box, |
| wifiblaster_controller=wifiblaster_controller) |
| wlm.mac = helpers.EncodeMAC(fakemac) |
| managers.append(wlm) |
| else: |
| # The list of managers is also refreshed occasionally in the main loop |
| CreateManagers(managers, high_power=opt.high_power, tv_box=opt.tv_box, |
| wifiblaster_controller=wifiblaster_controller) |
| if not managers: |
| raise Exception('no wifi AP-mode devices found. Try --fake.') |
| |
| last_sent = last_autochan = last_print = 0 |
| while 1: |
| TouchAliveFile() |
| if opt.watch_pid > 1: |
| try: |
| os.kill(opt.watch_pid, 0) |
| except OSError as e: |
| if e.errno == errno.ESRCH: |
| log.Log('watch-pid %r died; shutting down', opt.watch_pid) |
| break |
| else: |
| raise |
| # else process is still alive, continue |
| rfds = [] |
| for m in managers: |
| rfds.extend(m.GetReadFds()) |
| timeouts = [m.NextTimeout() for m in managers] |
| if opt.tx_interval: |
| timeouts.append(last_sent + opt.tx_interval) |
| if opt.autochan_interval: |
| timeouts.append(last_autochan + opt.autochan_interval) |
| if opt.print_interval: |
| timeouts.append(last_print + opt.print_interval) |
| timeouts.append(wifiblaster_controller.NextTimeout()) |
| timeout = min(filter(None, timeouts)) |
| log.Debug2('now=%f timeout=%f timeouts=%r', gettime(), timeout, timeouts) |
| if timeout: timeout -= gettime() |
| if timeout < 0: timeout = 0 |
| if timeout is None and opt.watch_pid: timeout = 5.0 |
| gotpackets = 0 |
| for _ in xrange(64): |
| r, _, _ = select.select(rfds, [], [], timeout) |
| if not r: |
| log.WriteEventFile('nopackets') |
| break |
| timeout = 0 |
| for i in r: |
| for m in managers: |
| if i in m.GetReadFds(): |
| gotpackets += m.ReadReady() |
| if gotpackets: |
| log.WriteEventFile('gotpacket') |
| now = gettime() |
| # TODO(apenwarr): how often should we really transmit? |
| # Also, consider sending out an update (almost) immediately when a new |
| # node joins, so it can learn about the other nodes as quickly as |
| # possible. But if we do that, we need to rate limit it somehow. |
| for m in managers: |
| if m.primary: |
| m.DoScans() |
| |
| if ((opt.tx_interval and now - last_sent > opt.tx_interval) or ( |
| opt.autochan_interval and now - last_autochan > opt.autochan_interval)): |
| if not opt.fake: |
| CreateManagers(managers, high_power=opt.high_power, tv_box=opt.tv_box, |
| wifiblaster_controller=wifiblaster_controller) |
| for m in managers: |
| m.UpdateStationInfo() |
| if opt.tx_interval and now - last_sent > opt.tx_interval: |
| last_sent = now |
| for m in managers: |
| if m.primary: |
| m.SendUpdate() |
| log.WriteEventFile('sentpacket') |
| if opt.autochan_interval and now - last_autochan > opt.autochan_interval: |
| last_autochan = now |
| for m in managers: |
| if m.primary: |
| m.ChooseChannel() |
| |
| if opt.print_interval and now - last_print > opt.print_interval: |
| last_print = now |
| selfmacs = set() |
| peers = {} |
| peer_data = {} |
| seen_peers = {} |
| self_signals = {} |
| bss_signal = {} |
| # Get all peers from all interfaces; remove duplicates. |
| for m in managers: |
| selfmacs.add(m.mac) |
| for peermac, p in m.peer_list.iteritems(): |
| peers[peermac] = m, p |
| if p.me.mac not in m.bss_list: |
| continue |
| b = m.bss_list[p.me.mac] |
| m.ap_signals[helpers.DecodeMAC(p.me.mac)] = b.rssi |
| for m, p in peers.values(): |
| seen_bss_peers = [bss for bss in p.seen_bss if bss.mac in peers] |
| if p.me.mac in selfmacs: continue |
| for i, b in enumerate(seen_bss_peers): |
| # `iw scan` can't see flags set in Waveguide. |
| # Join flags set in Waveguide with the results of the `iw scan`. |
| _, waveguide_peer = peers.get(b.mac) |
| if waveguide_peer: |
| # pylint:disable=protected-access |
| seen_bss_peers[i] = b._replace(flags=waveguide_peer.me.flags) |
| if b.mac in selfmacs: |
| bss_signal[helpers.DecodeMAC(p.me.mac)] = b.rssi |
| |
| seen_peers[helpers.DecodeMAC(p.me.mac)] = seen_bss_peers |
| self_signals[m.mac] = bss_signal |
| peer_data[m.mac] = seen_peers |
| log.Log('%s: APs=%-4d peer-APs=%s stations=%s', |
| helpers.DecodeMAC(p.me.mac), len(p.seen_bss), |
| ','.join('%s(%d)' % (helpers.DecodeMAC(i.mac), i.rssi) |
| for i in sorted(seen_bss_peers, |
| key=lambda i: -i.rssi)), |
| ','.join('%s(%d)' % (helpers.DecodeMAC(i.mac), i.rssi) |
| for i in sorted(p.assoc, |
| key=lambda i: -i.rssi))) |
| |
| for m in managers: |
| if m.mac in self_signals: |
| m.self_signals = self_signals[m.mac] |
| m.WritePeerApInfoFile(peer_data[m.mac]) |
| m.WriteJsonSignals() |
| # Log STA information. Only log station band capabilities if there we can |
| # determine it, i.e. if there are APs on both bands with the same SSID. |
| log_sta_band_capabilities = do_ssids_match(managers) |
| can2G_count = can5G_count = 0 |
| for m in managers: |
| for assoc in m.assoc_list.itervalues(): |
| station = helpers.DecodeMAC(assoc.mac) |
| if log_sta_band_capabilities: |
| if assoc.can5G: |
| can5G_count += 1 |
| capability = '5' |
| else: |
| can2G_count += 1 |
| capability = '2.4' |
| m.Log('Connected station %s supports %s GHz', station, capability) |
| species = clientinfo.taxonomize(station) |
| if species: |
| m.Log('Connected station %s taxonomy: %s', station, species) |
| if log_sta_band_capabilities: |
| log.Log('Connected stations: total %d, 5 GHz %d, 2.4 GHz %d', |
| can5G_count + can2G_count, can5G_count, can2G_count) |
| |
| wifiblaster_controller.Poll(now) |
| if not r: |
| log.WriteEventFile('ready') |
| |
| |
| if __name__ == '__main__': |
| main() |
