tests/hwsim/wpasupplicant.py

   1 # Python class for controlling wpa_supplicant
   2 # Copyright (c) 2013-2014, Jouni Malinen <j@w1.fi>
   3 #
   4 # This software may be distributed under the terms of the BSD license.
   5 # See README for more details.
   6
   7 import os
   8 import time
   9 import logging
  10 import re
  11 import subprocess
  12 import wpaspy
  13
  14 logger = logging.getLogger()
  15 wpas_ctrl = '/var/run/wpa_supplicant'
  16
  17 class WpaSupplicant:
  18     def __init__(self, ifname=None, global_iface=None):
  19         self.group_ifname = None
  20         if ifname:
  21             self.set_ifname(ifname)
  22         else:
  23             self.ifname = None
  24
  25         self.global_iface = global_iface
  26         if global_iface:
  27             self.global_ctrl = wpaspy.Ctrl(global_iface)
  28             self.global_mon = wpaspy.Ctrl(global_iface)
  29             self.global_mon.attach()
  30
  31     def set_ifname(self, ifname):
  32         self.ifname = ifname
  33         self.ctrl = wpaspy.Ctrl(os.path.join(wpas_ctrl, ifname))
  34         self.mon = wpaspy.Ctrl(os.path.join(wpas_ctrl, ifname))
  35         self.mon.attach()
  36
  37     def remove_ifname(self):
  38         if self.ifname:
  39             self.mon.detach()
  40             self.mon = None
  41             self.ctrl = None
  42             self.ifname = None
  43
  44     def interface_add(self, ifname, driver="nl80211", drv_params=None):
  45         try:
  46             groups = subprocess.check_output(["id"])
  47             group = "admin" if "(admin)" in groups else "adm"
  48         except Exception, e:
  49             group = "admin"
  50         cmd = "INTERFACE_ADD " + ifname + "\t\t" + driver + "\tDIR=/var/run/wpa_supplicant GROUP=" + group
  51         if drv_params:
  52             cmd = cmd + '\t' + drv_params
  53         if "FAIL" in self.global_request(cmd):
  54             raise Exception("Failed to add a dynamic wpa_supplicant interface")
  55         self.set_ifname(ifname)
  56
  57     def interface_remove(self, ifname):
  58         self.remove_ifname()
  59         self.global_request("INTERFACE_REMOVE " + ifname)
  60
  61     def request(self, cmd):
  62         logger.debug(self.ifname + ": CTRL: " + cmd)
  63         return self.ctrl.request(cmd)
  64
  65     def global_request(self, cmd):
  66         if self.global_iface is None:
  67             self.request(cmd)
  68         else:
  69             ifname = self.ifname or self.global_iface
  70             logger.debug(ifname + ": CTRL: " + cmd)
  71             return self.global_ctrl.request(cmd)
  72
  73     def group_request(self, cmd):
  74         if self.group_ifname and self.group_ifname != self.ifname:
  75             logger.debug(self.group_ifname + ": CTRL: " + cmd)
  76             gctrl = wpaspy.Ctrl(os.path.join(wpas_ctrl, self.group_ifname))
  77             return gctrl.request(cmd)
  78         return self.request(cmd)
  79
  80     def ping(self):
  81         return "PONG" in self.request("PING")
  82
  83     def reset(self):
  84         res = self.request("FLUSH")
  85         if not "OK" in res:
  86             logger.info("FLUSH to " + self.ifname + " failed: " + res)
  87         self.request("WPS_ER_STOP")
  88         self.request("SET external_sim 0")
  89         self.request("SET hessid 00:00:00:00:00:00")
  90         self.request("SET access_network_type 15")
  91         self.request("SET p2p_add_cli_chan 0")
  92         self.request("SET p2p_no_go_freq ")
  93         self.request("SET p2p_pref_chan ")
  94         self.request("SET p2p_no_group_iface 1")
  95         self.request("SET p2p_go_intent 7")
  96         self.group_ifname = None
  97         self.dump_monitor()
  98
  99         iter = 0
 100         while iter < 60:
 101             state = self.get_driver_status_field("scan_state")
 102             if "SCAN_STARTED" in state or "SCAN_REQUESTED" in state:
 103                 logger.info(self.ifname + ": Waiting for scan operation to complete before continuing")
 104                 time.sleep(1)
 105             else:
 106                 break
 107             iter = iter + 1
 108         if iter == 60:
 109             logger.error(self.ifname + ": Driver scan state did not clear")
 110             print "Trying to clear cfg80211/mac80211 scan state"
 111             try:
 112                 cmd = ["sudo", "ifconfig", self.ifname, "down"]
 113                 subprocess.call(cmd)
 114             except subprocess.CalledProcessError, e:
 115                 logger.info("ifconfig failed: " + str(e.returncode))
 116                 logger.info(e.output)
 117             try:
 118                 cmd = ["sudo", "ifconfig", self.ifname, "up"]
 119                 subprocess.call(cmd)
 120             except subprocess.CalledProcessError, e:
 121                 logger.info("ifconfig failed: " + str(e.returncode))
 122                 logger.info(e.output)
 123         if iter > 0:
 124             # The ongoing scan could have discovered BSSes or P2P peers
 125             logger.info("Run FLUSH again since scan was in progress")
 126             self.request("FLUSH")
 127             self.dump_monitor()
 128
 129         if not self.ping():
 130             logger.info("No PING response from " + self.ifname + " after reset")
 131
 132     def add_network(self):
 133         id = self.request("ADD_NETWORK")
 134         if "FAIL" in id:
 135             raise Exception("ADD_NETWORK failed")
 136         return int(id)
 137
 138     def remove_network(self, id):
 139         id = self.request("REMOVE_NETWORK " + str(id))
 140         if "FAIL" in id:
 141             raise Exception("REMOVE_NETWORK failed")
 142         return None
 143
 144     def get_network(self, id, field):
 145         res = self.request("GET_NETWORK " + str(id) + " " + field)
 146         if res == "FAIL\n":
 147             return None
 148         return res
 149
 150     def set_network(self, id, field, value):
 151         res = self.request("SET_NETWORK " + str(id) + " " + field + " " + value)
 152         if "FAIL" in res:
 153             raise Exception("SET_NETWORK failed")
 154         return None
 155
 156     def set_network_quoted(self, id, field, value):
 157         res = self.request("SET_NETWORK " + str(id) + " " + field + ' "' + value + '"')
 158         if "FAIL" in res:
 159             raise Exception("SET_NETWORK failed")
 160         return None
 161
 162     def list_networks(self):
 163         res = self.request("LIST_NETWORKS")
 164         lines = res.splitlines()
 165         networks = []
 166         for l in lines:
 167             if "network id" in l:
 168                 continue
 169             [id,ssid,bssid,flags] = l.split('\t')
 170             network = {}
 171             network['id'] = id
 172             network['ssid'] = ssid
 173             network['bssid'] = bssid
 174             network['flags'] = flags
 175             networks.append(network)
 176         return networks
 177
 178     def hs20_enable(self):
 179         self.request("SET interworking 1")
 180         self.request("SET hs20 1")
 181
 182     def add_cred(self):
 183         id = self.request("ADD_CRED")
 184         if "FAIL" in id:
 185             raise Exception("ADD_CRED failed")
 186         return int(id)
 187
 188     def remove_cred(self, id):
 189         id = self.request("REMOVE_CRED " + str(id))
 190         if "FAIL" in id:
 191             raise Exception("REMOVE_CRED failed")
 192         return None
 193
 194     def set_cred(self, id, field, value):
 195         res = self.request("SET_CRED " + str(id) + " " + field + " " + value)
 196         if "FAIL" in res:
 197             raise Exception("SET_CRED failed")
 198         return None
 199
 200     def set_cred_quoted(self, id, field, value):
 201         res = self.request("SET_CRED " + str(id) + " " + field + ' "' + value + '"')
 202         if "FAIL" in res:
 203             raise Exception("SET_CRED failed")
 204         return None
 205
 206     def add_cred_values(self, params):
 207         id = self.add_cred()
 208
 209         quoted = [ "realm", "username", "password", "domain", "imsi",
 210                    "excluded_ssid", "milenage", "ca_cert", "client_cert",
 211                    "private_key" ]
 212         for field in quoted:
 213             if field in params:
 214                 self.set_cred_quoted(id, field, params[field])
 215
 216         not_quoted = [ "eap", "roaming_consortium",
 217                        "required_roaming_consortium" ]
 218         for field in not_quoted:
 219             if field in params:
 220                 self.set_cred(id, field, params[field])
 221
 222         return id;
 223
 224     def select_network(self, id):
 225         id = self.request("SELECT_NETWORK " + str(id))
 226         if "FAIL" in id:
 227             raise Exception("SELECT_NETWORK failed")
 228         return None
 229
 230     def connect_network(self, id, timeout=10):
 231         self.dump_monitor()
 232         self.select_network(id)
 233         ev = self.wait_event(["CTRL-EVENT-CONNECTED"], timeout=timeout)
 234         if ev is None:
 235             raise Exception("Association with the AP timed out")
 236         self.dump_monitor()
 237
 238     def get_status(self):
 239         res = self.request("STATUS")
 240         lines = res.splitlines()
 241         vals = dict()
 242         for l in lines:
 243             try:
 244                 [name,value] = l.split('=', 1)
 245                 vals[name] = value
 246             except ValueError, e:
 247                 logger.info(self.ifname + ": Ignore unexpected STATUS line: " + l)
 248         return vals
 249
 250     def get_status_field(self, field):
 251         vals = self.get_status()
 252         if field in vals:
 253             return vals[field]
 254         return None
 255
 256     def get_group_status(self):
 257         res = self.group_request("STATUS")
 258         lines = res.splitlines()
 259         vals = dict()
 260         for l in lines:
 261             [name,value] = l.split('=', 1)
 262             vals[name] = value
 263         return vals
 264
 265     def get_group_status_field(self, field):
 266         vals = self.get_group_status()
 267         if field in vals:
 268             return vals[field]
 269         return None
 270
 271     def get_driver_status(self):
 272         res = self.request("STATUS-DRIVER")
 273         lines = res.splitlines()
 274         vals = dict()
 275         for l in lines:
 276             [name,value] = l.split('=', 1)
 277             vals[name] = value
 278         return vals
 279
 280     def get_driver_status_field(self, field):
 281         vals = self.get_driver_status()
 282         if field in vals:
 283             return vals[field]
 284         return None
 285
 286     def p2p_dev_addr(self):
 287         return self.get_status_field("p2p_device_address")
 288
 289     def p2p_interface_addr(self):
 290         return self.get_group_status_field("address")
 291
 292     def p2p_listen(self):
 293         return self.global_request("P2P_LISTEN")
 294
 295     def p2p_find(self, social=False, dev_id=None, dev_type=None):
 296         cmd = "P2P_FIND"
 297         if social:
 298             cmd = cmd + " type=social"
 299         if dev_id:
 300             cmd = cmd + " dev_id=" + dev_id
 301         if dev_type:
 302             cmd = cmd + " dev_type=" + dev_type
 303         return self.global_request(cmd)
 304
 305     def p2p_stop_find(self):
 306         return self.global_request("P2P_STOP_FIND")
 307
 308     def wps_read_pin(self):
 309         #TODO: make this random
 310         self.pin = "12345670"
 311         return self.pin
 312
 313     def peer_known(self, peer, full=True):
 314         res = self.global_request("P2P_PEER " + peer)
 315         if peer.lower() not in res.lower():
 316             return False
 317         if not full:
 318             return True
 319         return "[PROBE_REQ_ONLY]" not in res
 320
 321     def discover_peer(self, peer, full=True, timeout=15, social=True, force_find=False):
 322         logger.info(self.ifname + ": Trying to discover peer " + peer)
 323         if not force_find and self.peer_known(peer, full):
 324             return True
 325         self.p2p_find(social)
 326         count = 0
 327         while count < timeout:
 328             time.sleep(1)
 329             count = count + 1
 330             if self.peer_known(peer, full):
 331                 return True
 332         return False
 333
 334     def get_peer(self, peer):
 335         res = self.global_request("P2P_PEER " + peer)
 336         if peer.lower() not in res.lower():
 337             raise Exception("Peer information not available")
 338         lines = res.splitlines()
 339         vals = dict()
 340         for l in lines:
 341             if '=' in l:
 342                 [name,value] = l.split('=', 1)
 343                 vals[name] = value
 344         return vals
 345
 346     def group_form_result(self, ev, expect_failure=False, go_neg_res=None):
 347         if expect_failure:
 348             if "P2P-GROUP-STARTED" in ev:
 349                 raise Exception("Group formation succeeded when expecting failure")
 350             exp = r'<.>(P2P-GO-NEG-FAILURE) status=([0-9]*)'
 351             s = re.split(exp, ev)
 352             if len(s) < 3:
 353                 return None
 354             res = {}
 355             res['result'] = 'go-neg-failed'
 356             res['status'] = int(s[2])
 357             return res
 358
 359         if "P2P-GROUP-STARTED" not in ev:
 360             raise Exception("No P2P-GROUP-STARTED event seen")
 361
 362         exp = r'<.>(P2P-GROUP-STARTED) ([^ ]*) ([^ ]*) ssid="(.*)" freq=([0-9]*) ((?:psk=.*)|(?:passphrase=".*")) go_dev_addr=([0-9a-f:]*) ip_addr=([0-9.]*) ip_mask=([0-9.]*) go_ip_addr=([0-9.]*)'
 363         s = re.split(exp, ev)
 364         if len(s) < 11:
 365             exp = r'<.>(P2P-GROUP-STARTED) ([^ ]*) ([^ ]*) ssid="(.*)" freq=([0-9]*) ((?:psk=.*)|(?:passphrase=".*")) go_dev_addr=([0-9a-f:]*)'
 366             s = re.split(exp, ev)
 367             if len(s) < 8:
 368                 raise Exception("Could not parse P2P-GROUP-STARTED")
 369         res = {}
 370         res['result'] = 'success'
 371         res['ifname'] = s[2]
 372         self.group_ifname = s[2]
 373         res['role'] = s[3]
 374         res['ssid'] = s[4]
 375         res['freq'] = s[5]
 376         if "[PERSISTENT]" in ev:
 377             res['persistent'] = True
 378         else:
 379             res['persistent'] = False
 380         p = re.match(r'psk=([0-9a-f]*)', s[6])
 381         if p:
 382             res['psk'] = p.group(1)
 383         p = re.match(r'passphrase="(.*)"', s[6])
 384         if p:
 385             res['passphrase'] = p.group(1)
 386         res['go_dev_addr'] = s[7]
 387
 388         if len(s) > 8 and len(s[8]) > 0:
 389             res['ip_addr'] = s[8]
 390         if len(s) > 9:
 391             res['ip_mask'] = s[9]
 392         if len(s) > 10:
 393             res['go_ip_addr'] = s[10]
 394
 395         if go_neg_res:
 396             exp = r'<.>(P2P-GO-NEG-SUCCESS) role=(GO|client) freq=([0-9]*)'
 397             s = re.split(exp, go_neg_res)
 398             if len(s) < 4:
 399                 raise Exception("Could not parse P2P-GO-NEG-SUCCESS")
 400             res['go_neg_role'] = s[2]
 401             res['go_neg_freq'] = s[3]
 402
 403         return res
 404
 405     def p2p_go_neg_auth(self, peer, pin, method, go_intent=None, persistent=False, freq=None):
 406         if not self.discover_peer(peer):
 407             raise Exception("Peer " + peer + " not found")
 408         self.dump_monitor()
 409         cmd = "P2P_CONNECT " + peer + " " + pin + " " + method + " auth"
 410         if go_intent:
 411             cmd = cmd + ' go_intent=' + str(go_intent)
 412         if freq:
 413             cmd = cmd + ' freq=' + str(freq)
 414         if persistent:
 415             cmd = cmd + " persistent"
 416         if "OK" in self.global_request(cmd):
 417             return None
 418         raise Exception("P2P_CONNECT (auth) failed")
 419
 420     def p2p_go_neg_auth_result(self, timeout=1, expect_failure=False):
 421         go_neg_res = None
 422         ev = self.wait_global_event(["P2P-GO-NEG-SUCCESS",
 423                                      "P2P-GO-NEG-FAILURE"], timeout);
 424         if ev is None:
 425             if expect_failure:
 426                 return None
 427             raise Exception("Group formation timed out")
 428         if "P2P-GO-NEG-SUCCESS" in ev:
 429             go_neg_res = ev
 430             ev = self.wait_global_event(["P2P-GROUP-STARTED"], timeout);
 431             if ev is None:
 432                 if expect_failure:
 433                     return None
 434                 raise Exception("Group formation timed out")
 435         self.dump_monitor()
 436         return self.group_form_result(ev, expect_failure, go_neg_res)
 437
 438     def p2p_go_neg_init(self, peer, pin, method, timeout=0, go_intent=None, expect_failure=False, persistent=False, freq=None):
 439         if not self.discover_peer(peer):
 440             raise Exception("Peer " + peer + " not found")
 441         self.dump_monitor()
 442         if pin:
 443             cmd = "P2P_CONNECT " + peer + " " + pin + " " + method
 444         else:
 445             cmd = "P2P_CONNECT " + peer + " " + method
 446         if go_intent:
 447             cmd = cmd + ' go_intent=' + str(go_intent)
 448         if freq:
 449             cmd = cmd + ' freq=' + str(freq)
 450         if persistent:
 451             cmd = cmd + " persistent"
 452         if "OK" in self.global_request(cmd):
 453             if timeout == 0:
 454                 self.dump_monitor()
 455                 return None
 456             go_neg_res = None
 457             ev = self.wait_global_event(["P2P-GO-NEG-SUCCESS",
 458                                          "P2P-GO-NEG-FAILURE"], timeout)
 459             if ev is None:
 460                 if expect_failure:
 461                     return None
 462                 raise Exception("Group formation timed out")
 463             if "P2P-GO-NEG-SUCCESS" in ev:
 464                 go_neg_res = ev
 465                 ev = self.wait_global_event(["P2P-GROUP-STARTED"], timeout)
 466                 if ev is None:
 467                     if expect_failure:
 468                         return None
 469                     raise Exception("Group formation timed out")
 470             self.dump_monitor()
 471             return self.group_form_result(ev, expect_failure, go_neg_res)
 472         raise Exception("P2P_CONNECT failed")
 473
 474     def wait_event(self, events, timeout=10):
 475         start = os.times()[4]
 476         while True:
 477             while self.mon.pending():
 478                 ev = self.mon.recv()
 479                 logger.debug(self.ifname + ": " + ev)
 480                 for event in events:
 481                     if event in ev:
 482                         return ev
 483             now = os.times()[4]
 484             remaining = start + timeout - now
 485             if remaining <= 0:
 486                 break
 487             if not self.mon.pending(timeout=remaining):
 488                 break
 489         return None
 490
 491     def wait_global_event(self, events, timeout):
 492         if self.global_iface is None:
 493             self.wait_event(events, timeout)
 494         else:
 495             start = os.times()[4]
 496             while True:
 497                 while self.global_mon.pending():
 498                     ev = self.global_mon.recv()
 499                     logger.debug(self.ifname + "(global): " + ev)
 500                     for event in events:
 501                         if event in ev:
 502                             return ev
 503                 now = os.times()[4]
 504                 remaining = start + timeout - now
 505                 if remaining <= 0:
 506                     break
 507                 if not self.global_mon.pending(timeout=remaining):
 508                     break
 509         return None
 510
 511     def wait_go_ending_session(self):
 512         ev = self.wait_event(["P2P-GROUP-REMOVED"], timeout=3)
 513         if ev is None:
 514             raise Exception("Group removal event timed out")
 515         if "reason=GO_ENDING_SESSION" not in ev:
 516             raise Exception("Unexpected group removal reason")
 517
 518     def dump_monitor(self):
 519         while self.mon.pending():
 520             ev = self.mon.recv()
 521             logger.debug(self.ifname + ": " + ev)
 522         while self.global_mon.pending():
 523             ev = self.global_mon.recv()
 524             logger.debug(self.ifname + "(global): " + ev)
 525
 526     def remove_group(self, ifname=None):
 527         if ifname is None:
 528             ifname = self.group_ifname if self.group_ifname else self.ifname
 529         if "OK" not in self.global_request("P2P_GROUP_REMOVE " + ifname):
 530             raise Exception("Group could not be removed")
 531         self.group_ifname = None
 532
 533     def p2p_start_go(self, persistent=None, freq=None):
 534         self.dump_monitor()
 535         cmd = "P2P_GROUP_ADD"
 536         if persistent is None:
 537             pass
 538         elif persistent is True:
 539             cmd = cmd + " persistent"
 540         else:
 541             cmd = cmd + " persistent=" + str(persistent)
 542         if freq:
 543             cmd = cmd + " freq=" + str(freq)
 544         if "OK" in self.global_request(cmd):
 545             ev = self.wait_global_event(["P2P-GROUP-STARTED"], timeout=5)
 546             if ev is None:
 547                 raise Exception("GO start up timed out")
 548             self.dump_monitor()
 549             return self.group_form_result(ev)
 550         raise Exception("P2P_GROUP_ADD failed")
 551
 552     def p2p_go_authorize_client(self, pin):
 553         cmd = "WPS_PIN any " + pin
 554         if "FAIL" in self.group_request(cmd):
 555             raise Exception("Failed to authorize client connection on GO")
 556         return None
 557
 558     def p2p_go_authorize_client_pbc(self):
 559         cmd = "WPS_PBC"
 560         if "FAIL" in self.group_request(cmd):
 561             raise Exception("Failed to authorize client connection on GO")
 562         return None
 563
 564     def p2p_connect_group(self, go_addr, pin, timeout=0, social=False):
 565         self.dump_monitor()
 566         if not self.discover_peer(go_addr, social=social):
 567             raise Exception("GO " + go_addr + " not found")
 568         self.dump_monitor()
 569         cmd = "P2P_CONNECT " + go_addr + " " + pin + " join"
 570         if "OK" in self.global_request(cmd):
 571             if timeout == 0:
 572                 self.dump_monitor()
 573                 return None
 574             ev = self.wait_global_event(["P2P-GROUP-STARTED"], timeout)
 575             if ev is None:
 576                 raise Exception("Joining the group timed out")
 577             self.dump_monitor()
 578             return self.group_form_result(ev)
 579         raise Exception("P2P_CONNECT(join) failed")
 580
 581     def tdls_setup(self, peer):
 582         cmd = "TDLS_SETUP " + peer
 583         if "FAIL" in self.group_request(cmd):
 584             raise Exception("Failed to request TDLS setup")
 585         return None
 586
 587     def tdls_teardown(self, peer):
 588         cmd = "TDLS_TEARDOWN " + peer
 589         if "FAIL" in self.group_request(cmd):
 590             raise Exception("Failed to request TDLS teardown")
 591         return None
 592
 593     def connect(self, ssid=None, ssid2=None, **kwargs):
 594         logger.info("Connect STA " + self.ifname + " to AP")
 595         id = self.add_network()
 596         if ssid:
 597             self.set_network_quoted(id, "ssid", ssid)
 598         elif ssid2:
 599             self.set_network(id, "ssid", ssid2)
 600
 601         quoted = [ "psk", "identity", "anonymous_identity", "password",
 602                    "ca_cert", "client_cert", "private_key",
 603                    "private_key_passwd", "ca_cert2", "client_cert2",
 604                    "private_key2", "phase1", "phase2", "domain_suffix_match",
 605                    "altsubject_match", "subject_match", "pac_file", "dh_file" ]
 606         for field in quoted:
 607             if field in kwargs and kwargs[field]:
 608                 self.set_network_quoted(id, field, kwargs[field])
 609
 610         not_quoted = [ "proto", "key_mgmt", "ieee80211w", "pairwise",
 611                        "group", "wep_key0", "scan_freq", "eap",
 612                        "eapol_flags", "fragment_size", "scan_ssid", "auth_alg" ]
 613         for field in not_quoted:
 614             if field in kwargs and kwargs[field]:
 615                 self.set_network(id, field, kwargs[field])
 616
 617         if "raw_psk" in kwargs and kwargs['raw_psk']:
 618             self.set_network(id, "psk", kwargs['raw_psk'])
 619         if "password_hex" in kwargs and kwargs['password_hex']:
 620             self.set_network(id, "password", kwargs['password_hex'])
 621         if "peerkey" in kwargs and kwargs['peerkey']:
 622             self.set_network(id, "peerkey", "1")
 623         if "okc" in kwargs and kwargs['okc']:
 624             self.set_network(id, "proactive_key_caching", "1")
 625         if "ocsp" in kwargs and kwargs['ocsp']:
 626             self.set_network(id, "ocsp", str(kwargs['ocsp']))
 627         if "only_add_network" in kwargs and kwargs['only_add_network']:
 628             return id
 629         if "wait_connect" not in kwargs or kwargs['wait_connect']:
 630             if "eap" in kwargs:
 631                 self.connect_network(id, timeout=20)
 632             else:
 633                 self.connect_network(id)
 634         else:
 635             self.dump_monitor()
 636             self.select_network(id)
 637         return id
 638
 639     def scan(self, type=None, freq=None, no_wait=False):
 640         if type:
 641             cmd = "SCAN TYPE=" + type
 642         else:
 643             cmd = "SCAN"
 644         if freq:
 645             cmd = cmd + " freq=" + freq
 646         if not no_wait:
 647             self.dump_monitor()
 648         if not "OK" in self.request(cmd):
 649             raise Exception("Failed to trigger scan")
 650         if no_wait:
 651             return
 652         ev = self.wait_event(["CTRL-EVENT-SCAN-RESULTS"], 15)
 653         if ev is None:
 654             raise Exception("Scan timed out")
 655
 656     def roam(self, bssid):
 657         self.dump_monitor()
 658         self.request("ROAM " + bssid)
 659         ev = self.wait_event(["CTRL-EVENT-CONNECTED"], timeout=10)
 660         if ev is None:
 661             raise Exception("Roaming with the AP timed out")
 662         self.dump_monitor()
 663
 664     def roam_over_ds(self, bssid):
 665         self.dump_monitor()
 666         self.request("FT_DS " + bssid)
 667         ev = self.wait_event(["CTRL-EVENT-CONNECTED"], timeout=10)
 668         if ev is None:
 669             raise Exception("Roaming with the AP timed out")
 670         self.dump_monitor()
 671
 672     def wps_reg(self, bssid, pin, new_ssid=None, key_mgmt=None, cipher=None,
 673                 new_passphrase=None, no_wait=False):
 674         self.dump_monitor()
 675         if new_ssid:
 676             self.request("WPS_REG " + bssid + " " + pin + " " +
 677                          new_ssid.encode("hex") + " " + key_mgmt + " " +
 678                          cipher + " " + new_passphrase.encode("hex"))
 679             if no_wait:
 680                 return
 681             ev = self.wait_event(["WPS-SUCCESS"], timeout=15)
 682         else:
 683             self.request("WPS_REG " + bssid + " " + pin)
 684             if no_wait:
 685                 return
 686             ev = self.wait_event(["WPS-CRED-RECEIVED"], timeout=15)
 687             if ev is None:
 688                 raise Exception("WPS cred timed out")
 689             ev = self.wait_event(["WPS-FAIL"], timeout=15)
 690         if ev is None:
 691             raise Exception("WPS timed out")
 692         ev = self.wait_event(["CTRL-EVENT-CONNECTED"], timeout=15)
 693         if ev is None:
 694             raise Exception("Association with the AP timed out")
 695
 696     def relog(self):
 697         self.request("RELOG")
 698
 699     def wait_completed(self, timeout=10):
 700         for i in range(0, timeout * 2):
 701             if self.get_status_field("wpa_state") == "COMPLETED":
 702                 return
 703             time.sleep(0.5)
 704         raise Exception("Timeout while waiting for COMPLETED state")
 705
 706     def get_capability(self, field):
 707         res = self.request("GET_CAPABILITY " + field)
 708         if "FAIL" in res:
 709             return None
 710         return res.split(' ')
 711
 712     def get_bss(self, bssid):
 713         res = self.request("BSS " + bssid)
 714         lines = res.splitlines()
 715         vals = dict()
 716         for l in lines:
 717             [name,value] = l.split('=', 1)
 718             vals[name] = value
 719         return vals
 720
 721     def get_pmksa(self, bssid):
 722         res = self.request("PMKSA")
 723         lines = res.splitlines()
 724         for l in lines:
 725             if bssid not in l:
 726                 continue
 727             vals = dict()
 728             [index,aa,pmkid,expiration,opportunistic] = l.split(' ')
 729             vals['index'] = index
 730             vals['pmkid'] = pmkid
 731             vals['expiration'] = expiration
 732             vals['opportunistic'] = opportunistic
 733             return vals
 734         return None
 735
 736     def get_sta(self, addr, info=None, next=False):
 737         cmd = "STA-NEXT " if next else "STA "
 738         if addr is None:
 739             res = self.request("STA-FIRST")
 740         elif info:
 741             res = self.request(cmd + addr + " " + info)
 742         else:
 743             res = self.request(cmd + addr)
 744         lines = res.splitlines()
 745         vals = dict()
 746         first = True
 747         for l in lines:
 748             if first:
 749                 vals['addr'] = l
 750                 first = False
 751             else:
 752                 [name,value] = l.split('=', 1)
 753                 vals[name] = value
 754         return vals