| # Copyright (c) 2010 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| import logging, re, time |
| from autotest_lib.client.common_lib import error |
| from autotest_lib.server import site_linux_system |
| |
| def isLinuxRouter(router): |
| router_uname = router.run('uname').stdout |
| return re.search('Linux', router_uname) |
| |
| class LinuxRouter(site_linux_system.LinuxSystem): |
| """ |
| Linux/mac80211-style WiFi Router support for WiFiTest class. |
| |
| This class implements test methods/steps that communicate with a |
| router implemented with Linux/mac80211. The router must |
| be pre-configured to enable ssh access and have a mac80211-based |
| wireless device. We also assume hostapd 0.7.x and iw are present |
| and any necessary modules are pre-loaded. |
| """ |
| |
| |
| def __init__(self, host, params, defssid): |
| site_linux_system.LinuxSystem.__init__(self, host, params, "router") |
| self._remove_interfaces() |
| |
| # Router host. |
| self.router = host |
| |
| self.cmd_hostapd = self.__must_be_installed(host, |
| params.get("cmd_hostapd", "/usr/sbin/hostapd")) |
| self.cmd_hostapd_cli = \ |
| params.get("cmd_hostapd_cli", "/usr/sbin/hostapd_cli") |
| self.dhcpd_conf = "/tmp/dhcpd.conf" |
| self.dhcpd_leases = "/tmp/dhcpd.leases" |
| |
| # hostapd configuration persists throughout the test, subsequent |
| # 'config' commands only modify it. |
| self.defssid = defssid |
| self.hostapd = { |
| 'configured': False, |
| 'file': "/tmp/hostapd-test.conf", |
| 'log': "/tmp/hostapd-test.log", |
| 'log_count': 0, |
| 'driver': "nl80211", |
| 'conf': { |
| 'ssid': defssid, |
| 'hw_mode': 'g', |
| 'ctrl_interface': '/tmp/hostapd-test.control', |
| 'logger_syslog': '-1', |
| 'logger_syslog_level': '0' |
| } |
| } |
| self.station = { |
| 'configured': False, |
| 'conf': { |
| 'ssid': defssid, |
| }, |
| } |
| self.default_interface = None |
| self.local_servers = [] |
| self.force_local_server = "force_local_server" in params |
| self.dhcp_low = 1 |
| self.dhcp_high = 128 |
| |
| # Kill hostapd if already running. |
| self.kill_hostapd() |
| |
| # Place us in the US by default |
| self.router.run("%s reg set US" % self.cmd_iw) |
| |
| def __must_be_installed(self, host, cmd): |
| if not self.__is_installed(host, cmd): |
| raise error.TestFail('Unable to find %s on %s' % (cmd, host.ip)) |
| return cmd |
| |
| def __is_installed(self, host, filename): |
| result = host.run("ls %s" % filename, ignore_status=True) |
| m = re.search(filename, result.stdout) |
| return m is not None |
| |
| |
| def create(self, params): |
| """ Create a wifi device of the specified type """ |
| # |
| # AP mode is handled entirely by hostapd so we only |
| # have to setup others (mapping the bsd type to what |
| # iw wants) |
| # |
| # map from bsd types to iw types |
| self.apmode = params['type'] in ("ap", "hostap") |
| if not self.apmode: |
| self.station['type'] = params['type'] |
| self.phytype = { |
| "sta" : "managed", |
| "monitor" : "monitor", |
| "adhoc" : "adhoc", |
| "ibss" : "ibss", |
| "ap" : "managed", # NB: handled by hostapd |
| "hostap" : "managed", # NB: handled by hostapd |
| "mesh" : "mesh", |
| "wds" : "wds", |
| }[params['type']] |
| |
| |
| def destroy(self, params): |
| """ Destroy a previously created device """ |
| # For linux, this is the same as deconfig. |
| self.deconfig(params) |
| |
| def has_local_server(self): |
| return bool(self.local_servers) |
| |
| def cleanup(self, params): |
| """ Clean up any resources in use """ |
| # For linux, this is a no-op |
| pass |
| |
| def kill_hostapd(self): |
| """ |
| Kills the hostapd process. Makes sure hostapd exits before |
| continuing since it sets the interface back to station mode in its |
| cleanup path. If we start another instance of hostapd before the |
| previous instance exits, the interface station mode will overwrite the |
| ap mode. |
| """ |
| self.router.run("pkill hostapd >/dev/null 2>&1 && " |
| "while pgrep hostapd &> /dev/null; do sleep 1; done", |
| timeout=30, |
| ignore_status=True) |
| |
| def hostap_config(self, params): |
| """ Configure the AP per test requirements """ |
| |
| # keep parameter modifications local-only |
| orig_params = params |
| params = params.copy() |
| |
| multi_interface = 'multi_interface' in params |
| if multi_interface: |
| # remove non-hostapd config item from params |
| params.pop('multi_interface') |
| elif self.hostapd['configured'] or self.station['configured']: |
| self.deconfig({}) |
| |
| local_server = params.pop('local_server', False) |
| |
| # Construct the hostapd.conf file and start hostapd. |
| conf = self.hostapd['conf'] |
| # default RTS and frag threshold to ``off'' |
| conf['rts_threshold'] = '2347' |
| conf['fragm_threshold'] = '2346' |
| |
| tx_power_params = {} |
| htcaps = set() |
| |
| conf['driver'] = params.get('hostapd_driver', |
| self.hostapd['driver']) |
| |
| for k, v in params.iteritems(): |
| if k == 'ssid': |
| conf['ssid'] = v |
| elif k == 'ssid_suffix': |
| conf['ssid'] = self.defssid[:(32-len(v))] + v |
| elif k == 'channel': |
| freq = int(v) |
| self.hostapd['frequency'] = freq |
| |
| # 2.4GHz |
| if freq <= 2484: |
| # Make sure hw_mode is set |
| if conf.get('hw_mode') == 'a': |
| conf['hw_mode'] = 'g' |
| |
| # Freq = 5 * chan + 2407, except channel 14 |
| if freq == 2484: |
| conf['channel'] = 14 |
| else: |
| conf['channel'] = (freq - 2407) / 5 |
| # 5GHz |
| else: |
| # Make sure hw_mode is set |
| conf['hw_mode'] = 'a' |
| # Freq = 5 * chan + 4000 |
| if freq < 5000: |
| conf['channel'] = (freq - 4000) / 5 |
| # Freq = 5 * chan + 5000 |
| else: |
| conf['channel'] = (freq - 5000) / 5 |
| |
| elif k == 'country': |
| conf['country_code'] = v |
| elif k == 'dotd': |
| conf['ieee80211d'] = 1 |
| elif k == '-dotd': |
| conf['ieee80211d'] = 0 |
| elif k == 'mode': |
| if v == '11a': |
| conf['hw_mode'] = 'a' |
| elif v == '11g': |
| conf['hw_mode'] = 'g' |
| elif v == '11b': |
| conf['hw_mode'] = 'b' |
| elif v == '11n': |
| conf['ieee80211n'] = 1 |
| elif k == 'bintval': |
| conf['beacon_int'] = v |
| elif k == 'dtimperiod': |
| conf['dtim_period'] = v |
| elif k == 'rtsthreshold': |
| conf['rts_threshold'] = v |
| elif k == 'fragthreshold': |
| conf['fragm_threshold'] = v |
| elif k == 'shortpreamble': |
| conf['preamble'] = 1 |
| elif k == 'authmode': |
| if v == "open": |
| conf['auth_algs'] = 1 |
| elif v == "shared": |
| conf['auth_algs'] = 2 |
| elif k == 'hidessid': |
| conf['ignore_broadcast_ssid'] = 1 |
| elif k == 'wme': |
| conf['wmm_enabled'] = 1 |
| elif k == '-wme': |
| conf['wmm_enabled'] = 0 |
| elif k == 'deftxkey': |
| conf['wep_default_key'] = v |
| elif k == 'ht20': |
| htcaps.add('') # NB: ensure 802.11n setup below |
| conf['wmm_enabled'] = 1 |
| elif k == 'ht40': |
| htcaps.add('[HT40-]') |
| htcaps.add('[HT40+]') |
| conf['wmm_enabled'] = 1 |
| elif k in ('ht40+', 'ht40-'): |
| htcaps.add('[%s]' % k.upper()) |
| conf['wmm_enabled'] = 1 |
| elif k == 'shortgi': |
| htcaps.add('[SHORT-GI-20]') |
| htcaps.add('[SHORT-GI-40]') |
| elif k == 'pureg': |
| pass # TODO(sleffler) need hostapd support |
| elif k == 'puren': |
| pass # TODO(sleffler) need hostapd support |
| elif k == 'protmode': |
| pass # TODO(sleffler) need hostapd support |
| elif k == 'ht': |
| htcaps.add('') # NB: ensure 802.11n setup below |
| elif k == 'htprotmode': |
| pass # TODO(sleffler) need hostapd support |
| elif k == 'rifs': |
| pass # TODO(sleffler) need hostapd support |
| elif k == 'wepmode': |
| pass # NB: meaningless for hostapd; ignore |
| elif k == '-ampdu': |
| pass # TODO(sleffler) need hostapd support |
| elif k == 'txpower': |
| tx_power_params['power'] = v |
| else: |
| conf[k] = v |
| |
| # Aggregate ht_capab. |
| if htcaps: |
| conf['ieee80211n'] = 1 |
| conf['ht_capab'] = ''.join(htcaps) |
| |
| # Figure out the correct interface. |
| conf['interface'] = self._get_wlanif(self.hostapd['frequency'], |
| self.phytype, |
| mode=conf.get('hw_mode', 'b')) |
| |
| # Generate hostapd.conf. |
| self._pre_config_hook(conf) |
| self.router.run("cat <<EOF >%s\n%s\nEOF\n" % |
| (self.hostapd['file'], '\n'.join( |
| "%s=%s" % kv for kv in conf.iteritems()))) |
| |
| self._pre_start_hook(orig_params) |
| |
| # Run hostapd. |
| logging.info("Starting hostapd...") |
| |
| self.router.run("%s -dd %s &> %s &" % |
| (self.cmd_hostapd, self.hostapd['file'], self.hostapd['log'])) |
| |
| if not multi_interface: |
| self.default_interface = conf['interface'] |
| |
| # Configure transmit power |
| tx_power_params['interface'] = conf['interface'] |
| self.set_txpower(tx_power_params) |
| |
| if self.force_local_server or local_server is not False: |
| self.start_local_server(conf['interface']) |
| |
| self._post_start_hook(orig_params) |
| |
| logging.info("AP configured.") |
| self.hostapd['configured'] = True |
| |
| @staticmethod |
| def ip_addr(netblock, idx): |
| """ |
| Simple IPv4 calculator. Takes host address in "IP/bits" notation |
| and returns netmask, broadcast address as well as integer offsets |
| into the address range. |
| """ |
| addr_str,bits = netblock.split('/') |
| addr = map(int, addr_str.split('.')) |
| mask_bits = (-1 << (32-int(bits))) & 0xffffffff |
| mask = [(mask_bits >> s) & 0xff for s in range(24, -1, -8)] |
| if idx == 'local': |
| return addr_str |
| elif idx == 'netmask': |
| return '.'.join(map(str, mask)) |
| elif idx == 'broadcast': |
| offset = [m ^ 0xff for m in mask] |
| else: |
| offset = [(idx >> s) & 0xff for s in range(24, -1, -8)] |
| return '.'.join(map(str, [(a & m) + o |
| for a, m, o in zip(addr, mask, offset)])) |
| |
| |
| def station_config(self, params): |
| # keep parameter modifications local-only |
| orig_params = params |
| params = params.copy() |
| |
| if 'multi_interface' in params: |
| raise NotImplementedError("station with multi_interface") |
| |
| if self.station['type'] != 'ibss': |
| raise NotImplementedError("non-ibss station") |
| |
| if self.station['configured'] or self.hostapd['configured']: |
| self.deconfig({}) |
| |
| local_server = params.pop('local_server', False) |
| mode = None |
| conf = self.station['conf'] |
| for k, v in params.iteritems(): |
| if k == 'ssid_suffix': |
| conf['ssid'] = self.defssid + v |
| elif k == 'channel': |
| freq = int(v) |
| if freq > 2484: |
| mode = 'a' |
| elif k == 'mode': |
| if v == '11a': |
| mode = 'a' |
| else: |
| conf[k] = v |
| |
| interface = self._get_wlanif(freq, self.phytype, mode) |
| |
| # Run interface configuration commands |
| for k, v in conf.iteritems(): |
| if k != 'ssid': |
| self.router.run("%s dev %s set %s %s" % |
| (self.cmd_iw, interface, k, v)) |
| |
| # Connect the station |
| self.router.run("%s link set %s up" % (self.cmd_ip, interface)) |
| self.router.run("%s dev %s ibss join %s %d" % |
| (self.cmd_iw, interface, conf['ssid'], freq)) |
| |
| if self.force_local_server or local_server is not False: |
| self.start_local_server(interface) |
| |
| self.station['configured'] = True |
| self.station['interface'] = interface |
| |
| |
| def start_local_server(self, interface): |
| logging.info("Starting up local server...") |
| |
| if len(self.local_servers) >= 256: |
| raise error.TestFail('Exhausted available local servers') |
| |
| netblock = '%d.%d.%d.%d/24' % \ |
| (192, 168, len(self.local_servers), 254) |
| |
| params = {} |
| params['netblock'] = netblock |
| params['subnet'] = self.ip_addr(netblock, 0) |
| params['netmask'] = self.ip_addr(netblock, 'netmask') |
| params['dhcp_range'] = ' '.join( |
| (self.ip_addr(netblock, self.dhcp_low), |
| self.ip_addr(netblock, self.dhcp_high))) |
| params['interface'] = interface |
| |
| params['ip_params'] = ("%s broadcast %s dev %s" % |
| (netblock, |
| self.ip_addr(netblock, 'broadcast'), |
| interface)) |
| self.local_servers.append(params) |
| |
| self.router.run("%s addr flush %s" % |
| (self.cmd_ip, interface)) |
| self.router.run("%s addr add %s" % |
| (self.cmd_ip, params['ip_params'])) |
| self.router.run("%s link set %s up" % |
| (self.cmd_ip, interface)) |
| self.start_dhcp_server() |
| |
| def start_dhcp_server(self): |
| dhcp_conf = '\n'.join(map( |
| lambda server_conf: \ |
| "subnet %(subnet)s netmask %(netmask)s {\n" \ |
| " range %(dhcp_range)s;\n" \ |
| "}" % server_conf, |
| self.local_servers)) |
| self.router.run("cat <<EOF >%s\n%s\nEOF\n" % |
| (self.dhcpd_conf, |
| '\n'.join(('ddns-update-style none;', dhcp_conf)))) |
| self.router.run("touch %s" % self.dhcpd_leases) |
| |
| self.router.run("pkill dhcpd >/dev/null 2>&1", ignore_status=True) |
| self.router.run("%s -q -cf %s -lf %s" % |
| (self.cmd_dhcpd, self.dhcpd_conf, self.dhcpd_leases)) |
| |
| |
| def config(self, params): |
| if self.apmode: |
| self.hostap_config(params) |
| else: |
| self.station_config(params) |
| |
| |
| def get_wifi_ip(self, ap_num): |
| if self.local_servers: |
| return self.ip_addr(self.local_servers[ap_num]['netblock'], |
| 'local') |
| else: |
| raise error.TestFail("No IP address assigned") |
| |
| |
| def deconfig(self, params): |
| """ De-configure the AP (will also bring wlan down) """ |
| |
| if not self.hostapd['configured'] and not self.station['configured']: |
| return |
| |
| # Taking down hostapd takes wlan0 and mon.wlan0 down. |
| if self.hostapd['configured']: |
| if 'silent' in params: |
| # Deconfigure without notifying DUT. Remove the monitor |
| # interface hostapd uses to send beacon and DEAUTH packets |
| self._remove_interfaces() |
| |
| self.kill_hostapd() |
| # self.router.run("rm -f %s" % self.hostapd['file']) |
| self.router.get_file(self.hostapd['log'], |
| 'debug/hostapd_router_%d.log' % |
| self.hostapd['log_count']) |
| self.hostapd['log_count'] += 1 |
| if self.station['configured']: |
| if self.station['type'] == 'ibss': |
| self.router.run("%s dev %s ibss leave" % |
| (self.cmd_iw, self.station['interface'])) |
| else: |
| self.router.run("%s dev %s disconnect" % |
| (self.cmd_iw, self.station['interface'])) |
| self.router.run("%s link set %s down" % (self.cmd_ip, |
| self.station['interface'])) |
| |
| if self.local_servers: |
| self.router.run("pkill dhcpd >/dev/null 2>&1", |
| ignore_status=True) |
| for server in self.local_servers: |
| self.router.run("%s addr del %s" % |
| (self.cmd_ip, server['ip_params'])) |
| self.local_servers = [] |
| |
| self.hostapd['configured'] = False |
| self.station['configured'] = False |
| |
| |
| def get_ssid(self): |
| return self.hostapd['conf']['ssid'] |
| |
| |
| def set_txpower(self, params): |
| self.router.run("%s dev %s set txpower %s" % |
| (self.cmd_iw, params.get('interface', |
| self.default_interface), |
| params.get('power', 'auto'))) |
| |
| |
| def deauth(self, params): |
| self.router.run('%s -p%s deauthenticate %s' % |
| (self.cmd_hostapd_cli, |
| self.hostapd['conf']['ctrl_interface'], |
| params['client'])) |
| |
| |
| def _pre_config_hook(self, config): |
| """ |
| Hook for subclasses. Run after gathering configuration parameters, |
| but before writing parameters to config file. |
| """ |
| pass |
| |
| |
| def _pre_start_hook(self, params): |
| """ |
| Hook for subclasses. Run after generating hostapd config file, but |
| before starting hostapd. |
| """ |
| pass |
| |
| |
| def _post_start_hook(self, params): |
| """Hook for subclasses. Run after starting hostapd.""" |
| pass |
