Thieu Le | e41a72d | 2012-02-06 20:46:51 +0000 | [diff] [blame] | 1 | // Copyright (c) 2012 The Chromium OS Authors. All rights reserved. |
mukesh agrawal | b54601c | 2011-06-07 17:39:22 -0700 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
Chris Masone | 092df3e | 2011-08-22 09:41:39 -0700 | [diff] [blame] | 5 | #include "shill/wifi_endpoint.h" |
| 6 | |
Paul Stewart | 72b2fdc | 2012-06-02 08:58:51 -0700 | [diff] [blame] | 7 | #include <algorithm> |
| 8 | |
Chris Masone | 092df3e | 2011-08-22 09:41:39 -0700 | [diff] [blame] | 9 | #include <base/logging.h> |
Eric Shienbrood | 3e20a23 | 2012-02-16 11:35:56 -0500 | [diff] [blame] | 10 | #include <base/stl_util.h> |
mukesh agrawal | b54601c | 2011-06-07 17:39:22 -0700 | [diff] [blame] | 11 | #include <base/stringprintf.h> |
| 12 | #include <base/string_number_conversions.h> |
mukesh agrawal | 6e27777 | 2011-09-29 15:04:23 -0700 | [diff] [blame] | 13 | #include <base/string_util.h> |
Chris Masone | 092df3e | 2011-08-22 09:41:39 -0700 | [diff] [blame] | 14 | #include <chromeos/dbus/service_constants.h> |
mukesh agrawal | b54601c | 2011-06-07 17:39:22 -0700 | [diff] [blame] | 15 | |
Thieu Le | 1df7f4e | 2012-02-10 15:21:45 -0800 | [diff] [blame] | 16 | #include "shill/ieee80211.h" |
mukesh agrawal | b20776f | 2012-02-10 16:00:36 -0800 | [diff] [blame] | 17 | #include "shill/proxy_factory.h" |
Ben Chan | fad4a0b | 2012-04-18 15:49:59 -0700 | [diff] [blame] | 18 | #include "shill/scope_logger.h" |
mukesh agrawal | b20776f | 2012-02-10 16:00:36 -0800 | [diff] [blame] | 19 | #include "shill/supplicant_bss_proxy_interface.h" |
mukesh agrawal | 16bc1b8 | 2012-02-09 18:38:26 -0800 | [diff] [blame] | 20 | #include "shill/wifi.h" |
mukesh agrawal | b20776f | 2012-02-10 16:00:36 -0800 | [diff] [blame] | 21 | #include "shill/wifi_endpoint.h" |
mukesh agrawal | 6e27777 | 2011-09-29 15:04:23 -0700 | [diff] [blame] | 22 | #include "shill/wpa_supplicant.h" |
| 23 | |
| 24 | using std::map; |
| 25 | using std::set; |
mukesh agrawal | b54601c | 2011-06-07 17:39:22 -0700 | [diff] [blame] | 26 | using std::string; |
mukesh agrawal | 6e27777 | 2011-09-29 15:04:23 -0700 | [diff] [blame] | 27 | using std::vector; |
mukesh agrawal | b54601c | 2011-06-07 17:39:22 -0700 | [diff] [blame] | 28 | |
| 29 | namespace shill { |
| 30 | |
mukesh agrawal | b20776f | 2012-02-10 16:00:36 -0800 | [diff] [blame] | 31 | WiFiEndpoint::WiFiEndpoint(ProxyFactory *proxy_factory, |
| 32 | const WiFiRefPtr &device, |
| 33 | const string &rpc_id, |
| 34 | const map<string, ::DBus::Variant> &properties) |
| 35 | : frequency_(0), |
| 36 | proxy_factory_(proxy_factory), |
| 37 | device_(device), |
| 38 | rpc_id_(rpc_id) { |
mukesh agrawal | b54601c | 2011-06-07 17:39:22 -0700 | [diff] [blame] | 39 | // XXX will segfault on missing properties |
| 40 | ssid_ = |
mukesh agrawal | 6e27777 | 2011-09-29 15:04:23 -0700 | [diff] [blame] | 41 | properties.find(wpa_supplicant::kBSSPropertySSID)->second. |
mukesh agrawal | b54601c | 2011-06-07 17:39:22 -0700 | [diff] [blame] | 42 | operator std::vector<uint8_t>(); |
| 43 | bssid_ = |
mukesh agrawal | 6e27777 | 2011-09-29 15:04:23 -0700 | [diff] [blame] | 44 | properties.find(wpa_supplicant::kBSSPropertyBSSID)->second. |
mukesh agrawal | b54601c | 2011-06-07 17:39:22 -0700 | [diff] [blame] | 45 | operator std::vector<uint8_t>(); |
| 46 | signal_strength_ = |
mukesh agrawal | 1590839 | 2011-11-16 18:29:25 +0000 | [diff] [blame] | 47 | properties.find(wpa_supplicant::kBSSPropertySignal)->second. |
| 48 | reader().get_int16(); |
Thieu Le | e41a72d | 2012-02-06 20:46:51 +0000 | [diff] [blame] | 49 | map<string, ::DBus::Variant>::const_iterator it = |
| 50 | properties.find(wpa_supplicant::kBSSPropertyFrequency); |
| 51 | if (it != properties.end()) |
| 52 | frequency_ = it->second.reader().get_uint16(); |
Paul Stewart | 72b2fdc | 2012-06-02 08:58:51 -0700 | [diff] [blame] | 53 | |
| 54 | Metrics::WiFiNetworkPhyMode phy_mode = Metrics::kWiFiNetworkPhyModeUndef; |
| 55 | if (!ParseIEs(properties, &phy_mode, &vendor_information_)) { |
| 56 | phy_mode = DeterminePhyModeFromFrequency(properties, frequency_); |
| 57 | } |
| 58 | physical_mode_ = phy_mode; |
| 59 | |
Chris Masone | 092df3e | 2011-08-22 09:41:39 -0700 | [diff] [blame] | 60 | network_mode_ = ParseMode( |
mukesh agrawal | 6e27777 | 2011-09-29 15:04:23 -0700 | [diff] [blame] | 61 | properties.find(wpa_supplicant::kBSSPropertyMode)->second); |
| 62 | security_mode_ = ParseSecurity(properties); |
mukesh agrawal | b54601c | 2011-06-07 17:39:22 -0700 | [diff] [blame] | 63 | |
Chris Masone | 092df3e | 2011-08-22 09:41:39 -0700 | [diff] [blame] | 64 | if (network_mode_.empty()) { |
mukesh agrawal | b54601c | 2011-06-07 17:39:22 -0700 | [diff] [blame] | 65 | // XXX log error? |
| 66 | } |
| 67 | |
| 68 | ssid_string_ = string(ssid_.begin(), ssid_.end()); |
mukesh agrawal | 16bc1b8 | 2012-02-09 18:38:26 -0800 | [diff] [blame] | 69 | WiFi::SanitizeSSID(&ssid_string_); |
mukesh agrawal | b54601c | 2011-06-07 17:39:22 -0700 | [diff] [blame] | 70 | ssid_hex_ = base::HexEncode(&(*ssid_.begin()), ssid_.size()); |
| 71 | bssid_string_ = StringPrintf("%02x:%02x:%02x:%02x:%02x:%02x", |
| 72 | bssid_[0], bssid_[1], bssid_[2], |
| 73 | bssid_[3], bssid_[4], bssid_[5]); |
| 74 | bssid_hex_ = base::HexEncode(&(*bssid_.begin()), bssid_.size()); |
| 75 | } |
| 76 | |
| 77 | WiFiEndpoint::~WiFiEndpoint() {} |
| 78 | |
mukesh agrawal | b20776f | 2012-02-10 16:00:36 -0800 | [diff] [blame] | 79 | void WiFiEndpoint::Start() { |
| 80 | supplicant_bss_proxy_.reset( |
| 81 | proxy_factory_->CreateSupplicantBSSProxy( |
| 82 | this, rpc_id_, wpa_supplicant::kDBusAddr)); |
| 83 | } |
| 84 | |
| 85 | void WiFiEndpoint::PropertiesChanged( |
| 86 | const map<string, ::DBus::Variant> &properties) { |
Darin Petkov | 3abc3be | 2012-06-27 10:48:23 +0200 | [diff] [blame] | 87 | SLOG(WiFi, 2) << __func__; |
mukesh agrawal | b20776f | 2012-02-10 16:00:36 -0800 | [diff] [blame] | 88 | map<string, ::DBus::Variant>::const_iterator properties_it = |
| 89 | properties.find(wpa_supplicant::kBSSPropertySignal); |
| 90 | if (properties_it != properties.end()) { |
| 91 | signal_strength_ = properties_it->second.reader().get_int16(); |
Ben Chan | fad4a0b | 2012-04-18 15:49:59 -0700 | [diff] [blame] | 92 | SLOG(WiFi, 2) << "WiFiEndpoint " << bssid_string_ << " signal is now " |
| 93 | << signal_strength_; |
mukesh agrawal | b20776f | 2012-02-10 16:00:36 -0800 | [diff] [blame] | 94 | device_->NotifyEndpointChanged(*this); |
| 95 | } |
| 96 | } |
| 97 | |
Paul Stewart | 72b2fdc | 2012-06-02 08:58:51 -0700 | [diff] [blame] | 98 | |
| 99 | map<string, string> WiFiEndpoint::GetVendorInformation() const { |
| 100 | map<string, string> vendor_information; |
| 101 | if (!vendor_information_.wps_manufacturer.empty()) { |
| 102 | vendor_information[kVendorWPSManufacturerProperty] = |
| 103 | vendor_information_.wps_manufacturer; |
| 104 | } |
| 105 | if (!vendor_information_.wps_model_name.empty()) { |
| 106 | vendor_information[kVendorWPSModelNameProperty] = |
| 107 | vendor_information_.wps_model_name; |
| 108 | } |
| 109 | if (!vendor_information_.wps_model_number.empty()) { |
| 110 | vendor_information[kVendorWPSModelNumberProperty] = |
| 111 | vendor_information_.wps_model_number; |
| 112 | } |
| 113 | if (!vendor_information_.wps_device_name.empty()) { |
| 114 | vendor_information[kVendorWPSDeviceNameProperty] = |
| 115 | vendor_information_.wps_device_name; |
| 116 | } |
| 117 | if (!vendor_information_.oui_list.empty()) { |
| 118 | vector<string> oui_list; |
| 119 | set<uint32_t>::const_iterator it; |
| 120 | for (it = vendor_information_.oui_list.begin(); |
| 121 | it != vendor_information_.oui_list.end(); |
| 122 | ++it) { |
| 123 | oui_list.push_back( |
| 124 | StringPrintf("%02x-%02x-%02x", |
| 125 | *it >> 16, (*it >> 8) & 0xff, *it & 0xff)); |
| 126 | } |
| 127 | vendor_information[kVendorOUIListProperty] = |
| 128 | JoinString(oui_list, ' '); |
| 129 | } |
| 130 | return vendor_information; |
| 131 | } |
| 132 | |
Chris Masone | 092df3e | 2011-08-22 09:41:39 -0700 | [diff] [blame] | 133 | // static |
Paul Stewart | 72b2fdc | 2012-06-02 08:58:51 -0700 | [diff] [blame] | 134 | uint32_t WiFiEndpoint::ModeStringToUint(const string &mode_string) { |
Chris Masone | 092df3e | 2011-08-22 09:41:39 -0700 | [diff] [blame] | 135 | if (mode_string == flimflam::kModeManaged) |
mukesh agrawal | 6e27777 | 2011-09-29 15:04:23 -0700 | [diff] [blame] | 136 | return wpa_supplicant::kNetworkModeInfrastructureInt; |
Chris Masone | 092df3e | 2011-08-22 09:41:39 -0700 | [diff] [blame] | 137 | else if (mode_string == flimflam::kModeAdhoc) |
mukesh agrawal | 6e27777 | 2011-09-29 15:04:23 -0700 | [diff] [blame] | 138 | return wpa_supplicant::kNetworkModeAdHocInt; |
Chris Masone | 092df3e | 2011-08-22 09:41:39 -0700 | [diff] [blame] | 139 | else |
| 140 | NOTIMPLEMENTED() << "Shill dos not support " << mode_string |
| 141 | << " mode at this time."; |
| 142 | return 0; |
| 143 | } |
| 144 | |
mukesh agrawal | 6e27777 | 2011-09-29 15:04:23 -0700 | [diff] [blame] | 145 | const vector<uint8_t> &WiFiEndpoint::ssid() const { |
mukesh agrawal | b54601c | 2011-06-07 17:39:22 -0700 | [diff] [blame] | 146 | return ssid_; |
| 147 | } |
| 148 | |
| 149 | const string &WiFiEndpoint::ssid_string() const { |
| 150 | return ssid_string_; |
| 151 | } |
| 152 | |
| 153 | const string &WiFiEndpoint::ssid_hex() const { |
| 154 | return ssid_hex_; |
| 155 | } |
| 156 | |
| 157 | const string &WiFiEndpoint::bssid_string() const { |
| 158 | return bssid_string_; |
| 159 | } |
| 160 | |
| 161 | const string &WiFiEndpoint::bssid_hex() const { |
| 162 | return bssid_hex_; |
| 163 | } |
| 164 | |
| 165 | int16_t WiFiEndpoint::signal_strength() const { |
| 166 | return signal_strength_; |
| 167 | } |
| 168 | |
Thieu Le | e41a72d | 2012-02-06 20:46:51 +0000 | [diff] [blame] | 169 | uint16 WiFiEndpoint::frequency() const { |
| 170 | return frequency_; |
| 171 | } |
| 172 | |
Thieu Le | 1df7f4e | 2012-02-10 15:21:45 -0800 | [diff] [blame] | 173 | uint16 WiFiEndpoint::physical_mode() const { |
| 174 | return physical_mode_; |
| 175 | } |
| 176 | |
Chris Masone | 092df3e | 2011-08-22 09:41:39 -0700 | [diff] [blame] | 177 | const string &WiFiEndpoint::network_mode() const { |
mukesh agrawal | 6e27777 | 2011-09-29 15:04:23 -0700 | [diff] [blame] | 178 | return network_mode_; |
| 179 | } |
| 180 | |
| 181 | const string &WiFiEndpoint::security_mode() const { |
| 182 | return security_mode_; |
mukesh agrawal | b54601c | 2011-06-07 17:39:22 -0700 | [diff] [blame] | 183 | } |
| 184 | |
Chris Masone | 092df3e | 2011-08-22 09:41:39 -0700 | [diff] [blame] | 185 | // static |
mukesh agrawal | b20776f | 2012-02-10 16:00:36 -0800 | [diff] [blame] | 186 | WiFiEndpoint *WiFiEndpoint::MakeOpenEndpoint(ProxyFactory *proxy_factory, |
| 187 | const WiFiRefPtr &wifi, |
| 188 | const string &ssid, |
mukesh agrawal | e1d90e9 | 2012-02-15 17:36:08 -0800 | [diff] [blame] | 189 | const string &bssid, |
| 190 | uint16 frequency, |
| 191 | int16 signal_dbm) { |
mukesh agrawal | 8a3188d | 2011-12-01 20:56:44 +0000 | [diff] [blame] | 192 | map <string, ::DBus::Variant> args; |
| 193 | ::DBus::MessageIter writer; |
| 194 | |
| 195 | writer = args[wpa_supplicant::kBSSPropertySSID].writer(); |
| 196 | writer << vector<uint8_t>(ssid.begin(), ssid.end()); |
| 197 | |
| 198 | string bssid_nosep; |
| 199 | RemoveChars(bssid, ":", &bssid_nosep); |
| 200 | vector<uint8_t> bssid_bytes; |
| 201 | base::HexStringToBytes(bssid_nosep, &bssid_bytes); |
| 202 | writer = args[wpa_supplicant::kBSSPropertyBSSID].writer(); |
| 203 | writer << bssid_bytes; |
| 204 | |
mukesh agrawal | e1d90e9 | 2012-02-15 17:36:08 -0800 | [diff] [blame] | 205 | args[wpa_supplicant::kBSSPropertySignal].writer().append_int16(signal_dbm); |
| 206 | args[wpa_supplicant::kBSSPropertyFrequency].writer().append_uint16(frequency); |
mukesh agrawal | 8a3188d | 2011-12-01 20:56:44 +0000 | [diff] [blame] | 207 | args[wpa_supplicant::kBSSPropertyMode].writer().append_string( |
| 208 | wpa_supplicant::kNetworkModeInfrastructure); |
| 209 | // We indicate this is an open BSS by leaving out all security properties. |
| 210 | |
mukesh agrawal | b20776f | 2012-02-10 16:00:36 -0800 | [diff] [blame] | 211 | return new WiFiEndpoint( |
| 212 | proxy_factory, wifi, bssid, args); // |bssid| fakes an RPC ID |
mukesh agrawal | 8a3188d | 2011-12-01 20:56:44 +0000 | [diff] [blame] | 213 | } |
| 214 | |
| 215 | // static |
mukesh agrawal | 6e27777 | 2011-09-29 15:04:23 -0700 | [diff] [blame] | 216 | const char *WiFiEndpoint::ParseMode(const string &mode_string) { |
| 217 | if (mode_string == wpa_supplicant::kNetworkModeInfrastructure) { |
Chris Masone | 092df3e | 2011-08-22 09:41:39 -0700 | [diff] [blame] | 218 | return flimflam::kModeManaged; |
mukesh agrawal | 6e27777 | 2011-09-29 15:04:23 -0700 | [diff] [blame] | 219 | } else if (mode_string == wpa_supplicant::kNetworkModeAdHoc) { |
Chris Masone | 092df3e | 2011-08-22 09:41:39 -0700 | [diff] [blame] | 220 | return flimflam::kModeAdhoc; |
mukesh agrawal | 6e27777 | 2011-09-29 15:04:23 -0700 | [diff] [blame] | 221 | } else if (mode_string == wpa_supplicant::kNetworkModeAccessPoint) { |
Chris Masone | 092df3e | 2011-08-22 09:41:39 -0700 | [diff] [blame] | 222 | NOTREACHED() << "Shill does not support AP mode at this time."; |
| 223 | return NULL; |
mukesh agrawal | b54601c | 2011-06-07 17:39:22 -0700 | [diff] [blame] | 224 | } else { |
Chris Masone | 092df3e | 2011-08-22 09:41:39 -0700 | [diff] [blame] | 225 | NOTREACHED() << "Unknown WiFi endpoint mode!"; |
| 226 | return NULL; |
mukesh agrawal | b54601c | 2011-06-07 17:39:22 -0700 | [diff] [blame] | 227 | } |
| 228 | } |
| 229 | |
mukesh agrawal | 6e27777 | 2011-09-29 15:04:23 -0700 | [diff] [blame] | 230 | // static |
| 231 | const char *WiFiEndpoint::ParseSecurity( |
| 232 | const map<string, ::DBus::Variant> &properties) { |
| 233 | set<KeyManagement> rsn_key_management_methods; |
| 234 | if (ContainsKey(properties, wpa_supplicant::kPropertyRSN)) { |
| 235 | // TODO(quiche): check type before casting |
| 236 | const map<string, ::DBus::Variant> rsn_properties( |
| 237 | properties.find(wpa_supplicant::kPropertyRSN)->second. |
| 238 | operator map<string, ::DBus::Variant>()); |
| 239 | ParseKeyManagementMethods(rsn_properties, &rsn_key_management_methods); |
| 240 | } |
| 241 | |
| 242 | set<KeyManagement> wpa_key_management_methods; |
| 243 | if (ContainsKey(properties, wpa_supplicant::kPropertyWPA)) { |
mukesh agrawal | 165e614 | 2011-11-22 02:22:56 +0000 | [diff] [blame] | 244 | // TODO(quiche): check type before casting |
mukesh agrawal | 6e27777 | 2011-09-29 15:04:23 -0700 | [diff] [blame] | 245 | const map<string, ::DBus::Variant> rsn_properties( |
| 246 | properties.find(wpa_supplicant::kPropertyWPA)->second. |
| 247 | operator map<string, ::DBus::Variant>()); |
| 248 | ParseKeyManagementMethods(rsn_properties, &wpa_key_management_methods); |
| 249 | } |
| 250 | |
| 251 | bool wep_privacy = false; |
| 252 | if (ContainsKey(properties, wpa_supplicant::kPropertyPrivacy)) { |
| 253 | wep_privacy = properties.find(wpa_supplicant::kPropertyPrivacy)->second. |
| 254 | reader().get_bool(); |
| 255 | } |
| 256 | |
| 257 | if (ContainsKey(rsn_key_management_methods, kKeyManagement802_1x) || |
| 258 | ContainsKey(wpa_key_management_methods, kKeyManagement802_1x)) { |
| 259 | return flimflam::kSecurity8021x; |
| 260 | } else if (ContainsKey(rsn_key_management_methods, kKeyManagementPSK)) { |
| 261 | return flimflam::kSecurityRsn; |
| 262 | } else if (ContainsKey(wpa_key_management_methods, kKeyManagementPSK)) { |
| 263 | return flimflam::kSecurityWpa; |
| 264 | } else if (wep_privacy) { |
| 265 | return flimflam::kSecurityWep; |
| 266 | } else { |
| 267 | return flimflam::kSecurityNone; |
| 268 | } |
| 269 | } |
| 270 | |
| 271 | // static |
| 272 | void WiFiEndpoint::ParseKeyManagementMethods( |
| 273 | const map<string, ::DBus::Variant> &security_method_properties, |
| 274 | set<KeyManagement> *key_management_methods) { |
| 275 | if (!ContainsKey(security_method_properties, |
| 276 | wpa_supplicant::kSecurityMethodPropertyKeyManagement)) { |
| 277 | return; |
| 278 | } |
| 279 | |
| 280 | // TODO(quiche): check type before cast |
| 281 | const vector<string> key_management_vec = |
| 282 | security_method_properties. |
| 283 | find(wpa_supplicant::kSecurityMethodPropertyKeyManagement)->second. |
| 284 | operator vector<string>(); |
| 285 | for (vector<string>::const_iterator it = key_management_vec.begin(); |
| 286 | it != key_management_vec.end(); |
| 287 | ++it) { |
| 288 | if (EndsWith(*it, wpa_supplicant::kKeyManagementMethodSuffixEAP, true)) { |
| 289 | key_management_methods->insert(kKeyManagement802_1x); |
| 290 | } else if ( |
| 291 | EndsWith(*it, wpa_supplicant::kKeyManagementMethodSuffixPSK, true)) { |
| 292 | key_management_methods->insert(kKeyManagementPSK); |
| 293 | } |
| 294 | } |
| 295 | } |
| 296 | |
Thieu Le | 1df7f4e | 2012-02-10 15:21:45 -0800 | [diff] [blame] | 297 | // static |
Paul Stewart | 72b2fdc | 2012-06-02 08:58:51 -0700 | [diff] [blame] | 298 | Metrics::WiFiNetworkPhyMode WiFiEndpoint::DeterminePhyModeFromFrequency( |
Thieu Le | 1df7f4e | 2012-02-10 15:21:45 -0800 | [diff] [blame] | 299 | const map<string, ::DBus::Variant> &properties, uint16 frequency) { |
| 300 | uint32_t max_rate = 0; |
| 301 | map<string, ::DBus::Variant>::const_iterator it = |
| 302 | properties.find(wpa_supplicant::kBSSPropertyRates); |
| 303 | if (it != properties.end()) { |
| 304 | vector<uint32_t> rates = it->second.operator vector<uint32_t>(); |
| 305 | if (rates.size() > 0) |
| 306 | max_rate = rates[0]; // Rates are sorted in descending order |
| 307 | } |
| 308 | |
| 309 | Metrics::WiFiNetworkPhyMode phy_mode = Metrics::kWiFiNetworkPhyModeUndef; |
Thieu Le | 1df7f4e | 2012-02-10 15:21:45 -0800 | [diff] [blame] | 310 | if (frequency < 3000) { |
| 311 | // 2.4GHz legacy, check for tx rate for 11b-only |
| 312 | // (note 22M is valid) |
| 313 | if (max_rate < 24000000) |
| 314 | phy_mode = Metrics::kWiFiNetworkPhyMode11b; |
| 315 | else |
| 316 | phy_mode = Metrics::kWiFiNetworkPhyMode11g; |
| 317 | } else { |
| 318 | phy_mode = Metrics::kWiFiNetworkPhyMode11a; |
| 319 | } |
| 320 | |
| 321 | return phy_mode; |
| 322 | } |
| 323 | |
| 324 | // static |
Paul Stewart | 72b2fdc | 2012-06-02 08:58:51 -0700 | [diff] [blame] | 325 | bool WiFiEndpoint::ParseIEs( |
| 326 | const map<string, ::DBus::Variant> &properties, |
| 327 | Metrics::WiFiNetworkPhyMode *phy_mode, |
| 328 | VendorInformation *vendor_information) { |
| 329 | |
| 330 | map<string, ::DBus::Variant>::const_iterator ies_property = |
| 331 | properties.find(wpa_supplicant::kBSSPropertyIEs); |
| 332 | if (ies_property == properties.end()) { |
| 333 | SLOG(WiFi, 2) << __func__ << ": No IE property in BSS."; |
| 334 | return false; |
Thieu Le | 1df7f4e | 2012-02-10 15:21:45 -0800 | [diff] [blame] | 335 | } |
| 336 | |
Paul Stewart | 72b2fdc | 2012-06-02 08:58:51 -0700 | [diff] [blame] | 337 | vector<uint8_t> ies = ies_property->second.operator vector<uint8_t>(); |
| 338 | |
| 339 | |
| 340 | // Format of an information element: |
| 341 | // 1 1 1 - 252 |
| 342 | // +------+--------+----------------+ |
| 343 | // | Type | Length | Data | |
| 344 | // +------+--------+----------------+ |
| 345 | *phy_mode = Metrics::kWiFiNetworkPhyModeUndef; |
| 346 | bool found_ht = false; |
| 347 | bool found_erp = false; |
| 348 | int ie_len = 0; |
| 349 | vector<uint8_t>::iterator it; |
| 350 | for (it = ies.begin(); |
| 351 | std::distance(it, ies.end()) > 1; // Ensure Length field is within PDU. |
| 352 | it += ie_len) { |
| 353 | ie_len = 2 + *(it + 1); |
| 354 | if (std::distance(it, ies.end()) < ie_len) { |
| 355 | LOG(ERROR) << __func__ << ": IE extends past containing PDU."; |
| 356 | break; |
| 357 | } |
| 358 | switch (*it) { |
| 359 | case IEEE_80211::kElemIdErp: |
| 360 | if (!found_ht) { |
| 361 | *phy_mode = Metrics::kWiFiNetworkPhyMode11g; |
| 362 | } |
| 363 | found_erp = true; |
| 364 | break; |
| 365 | case IEEE_80211::kElemIdHTCap: |
| 366 | case IEEE_80211::kElemIdHTInfo: |
| 367 | *phy_mode = Metrics::kWiFiNetworkPhyMode11n; |
| 368 | found_ht = true; |
| 369 | break; |
| 370 | case IEEE_80211::kElemIdVendor: |
| 371 | ParseVendorIE(it + 2, it + ie_len, vendor_information); |
| 372 | break; |
| 373 | } |
| 374 | } |
| 375 | return found_ht || found_erp; |
| 376 | } |
| 377 | |
| 378 | // static |
| 379 | void WiFiEndpoint::ParseVendorIE(vector<uint8_t>::const_iterator ie, |
| 380 | vector<uint8_t>::const_iterator end, |
| 381 | VendorInformation *vendor_information) { |
| 382 | // Format of an vendor-specific information element (with type |
| 383 | // and length field for the IE removed by the caller): |
| 384 | // 3 1 1 - 248 |
| 385 | // +------------+----------+----------------+ |
| 386 | // | OUI | OUI Type | Data | |
| 387 | // +------------+----------+----------------+ |
| 388 | |
| 389 | if (std::distance(ie, end) < 4) { |
| 390 | LOG(ERROR) << __func__ << ": no room in IE for OUI and type field."; |
| 391 | return; |
| 392 | } |
| 393 | uint32_t oui = (*ie << 16) | (*(ie + 1) << 8) | *(ie + 2); |
| 394 | uint8_t oui_type = *(ie + 3); |
| 395 | ie += 4; |
| 396 | |
| 397 | if (oui == IEEE_80211::kOUIVendorMicrosoft && |
| 398 | oui_type == IEEE_80211::kOUIMicrosoftWPS) { |
| 399 | // Format of a WPS data element: |
| 400 | // 2 2 |
| 401 | // +------+--------+----------------+ |
| 402 | // | Type | Length | Data | |
| 403 | // +------+--------+----------------+ |
| 404 | while (std::distance(ie, end) >= 4) { |
| 405 | int element_type = (*ie << 8) | *(ie + 1); |
| 406 | int element_length = (*(ie + 2) << 8) | *(ie + 3); |
| 407 | ie += 4; |
| 408 | if (std::distance(ie, end) < element_length) { |
| 409 | LOG(ERROR) << __func__ << ": WPS element extends past containing PDU."; |
| 410 | break; |
| 411 | } |
| 412 | string s(ie, ie + element_length); |
| 413 | if (IsStringASCII(s)) { |
| 414 | switch (element_type) { |
| 415 | case IEEE_80211::kWPSElementManufacturer: |
| 416 | vendor_information->wps_manufacturer = s; |
| 417 | break; |
| 418 | case IEEE_80211::kWPSElementModelName: |
| 419 | vendor_information->wps_model_name = s; |
| 420 | break; |
| 421 | case IEEE_80211::kWPSElementModelNumber: |
| 422 | vendor_information->wps_model_number = s; |
| 423 | break; |
| 424 | case IEEE_80211::kWPSElementDeviceName: |
| 425 | vendor_information->wps_device_name = s; |
| 426 | break; |
| 427 | } |
| 428 | } |
| 429 | ie += element_length; |
| 430 | } |
| 431 | } else if (oui != IEEE_80211::kOUIVendorEpigram && |
| 432 | oui != IEEE_80211::kOUIVendorMicrosoft) { |
| 433 | vendor_information->oui_list.insert(oui); |
| 434 | } |
Thieu Le | 1df7f4e | 2012-02-10 15:21:45 -0800 | [diff] [blame] | 435 | } |
| 436 | |
mukesh agrawal | b54601c | 2011-06-07 17:39:22 -0700 | [diff] [blame] | 437 | } // namespace shill |