Android中的AP扫描结果，通过WifiNative的JNI调用，实际调用wpa_supplicant的相应命令，并返回字符串给JNI方法，下面是对该字符串的解析函数：
WIFI添加一个网络配置，返回生成的网络ID
认证类型管理类：
Java代码
- private static final Pattern scanResultPattern = Pattern.compile("\t+");
- /**
- * Parse the scan result line passed to us by wpa_supplicant (helper).
- * @param line the line to parse
- * @return the {@link ScanResult} object
- */
- private ScanResult parseScanResult(String line) {
- ScanResult scanResult = null;
- if (line != null) {
- /*
- * Cache implementation (LinkedHashMap) is not synchronized, thus,
- * must synchronized here!
- */
- synchronized (mScanResultCache) {
- String[] result = scanResultPattern.split(line);
- if (3 <= result.length && result.length <= 5) {
- String bssid = result[0];
- // bssid | frequency | level | flags | ssid
- int frequency;
- int level;
- try {
- frequency = Integer.parseInt(result[1]);
- level = Integer.parseInt(result[2]);
- /* some implementations avoid negative values by adding 256
- * so we need to adjust for that here.
- */
- if (level > 0) level -= 256;
- } catch (NumberFormatException e) {
- frequency = 0;
- level = 0;
- }
- /*
- * The formatting of the results returned by
- * wpa_supplicant is intended to make the fields
- * line up nicely when printed,
- * not to make them easy to parse. So we have to
- * apply some heuristics to figure out which field
- * is the SSID and which field is the flags.
- */
- String ssid;
- String flags;
- if (result.length == 4) {
- if (result[3].charAt(0) == '[') {
- flags = result[3];
- ssid = "";
- } else {
- flags = "";
- ssid = result[3];
- }
- } else if (result.length == 5) {
- flags = result[3];
- ssid = result[4];
- } else {
- // Here, we must have 3 fields: no flags and ssid
- // set
- flags = "";
- ssid = "";
- }
- // bssid + ssid is the hash key
- String key = bssid + ssid;
- scanResult = mScanResultCache.get(key);
- if (scanResult != null) {
- scanResult.level = level;
- scanResult.SSID = ssid;
- scanResult.capabilities = flags;
- scanResult.frequency = frequency;
- } else {
- // Do not add scan results that have no SSID set
- if (0 < ssid.trim().length()) {
- scanResult =
- new ScanResult(
- ssid, bssid, flags, level, frequency);
- mScanResultCache.put(key, scanResult);
- }
- }
- } else {
- Slog.w(TAG, "Misformatted scan result text with " +
- result.length + " fields: " + line);
- }
- }
- }
- return scanResult;
- }
WIFI添加一个网络配置，返回生成的网络ID
Java代码
- /**
- * see {@link android.net.wifi.WifiManager#addOrUpdateNetwork(WifiConfiguration)}
- * @return the supplicant-assigned identifier for the new or updated
- * network if the operation succeeds, or {@code -1} if it fails
- */
- public int addOrUpdateNetwork(WifiConfiguration config) {
- enforceChangePermission();
- /*
- * If the supplied networkId is -1, we create a new empty
- * network configuration. Otherwise, the networkId should
- * refer to an existing configuration.
- */
- int netId = config.networkId;
- boolean newNetwork = netId == -1;
- boolean doReconfig = false;
- // networkId of -1 means we want to create a new network
- synchronized (mWifiStateTracker) {
- if (newNetwork) {
- netId = mWifiStateTracker.addNetwork();
- if (netId < 0) {
- if (DBG) {
- Slog.d(TAG, "Failed to add a network!");
- }
- return -1;
- }
- doReconfig = true;
- }
- mNeedReconfig = mNeedReconfig || doReconfig;
- }
- setVariables: {
- /*
- * Note that if a networkId for a non-existent network
- * was supplied, then the first setNetworkVariable()
- * will fail, so we don't bother to make a separate check
- * for the validity of the ID up front.
- */
- if (config.SSID != null &&
- !mWifiStateTracker.setNetworkVariable(
- netId,
- WifiConfiguration.ssidVarName,
- config.SSID)) {
- if (DBG) {
- Slog.d(TAG, "failed to set SSID: "+config.SSID);
- }
- break setVariables;
- }
- if (config.BSSID != null &&
- !mWifiStateTracker.setNetworkVariable(
- netId,
- WifiConfiguration.bssidVarName,
- config.BSSID)) {
- if (DBG) {
- Slog.d(TAG, "failed to set BSSID: "+config.BSSID);
- }
- break setVariables;
- }
- String allowedKeyManagementString =
- makeString(config.allowedKeyManagement, WifiConfiguration.KeyMgmt.strings);
- if (config.allowedKeyManagement.cardinality() != 0 &&
- !mWifiStateTracker.setNetworkVariable(
- netId,
- WifiConfiguration.KeyMgmt.varName,
- allowedKeyManagementString)) {
- if (DBG) {
- Slog.d(TAG, "failed to set key_mgmt: "+
- allowedKeyManagementString);
- }
- break setVariables;
- }
- String allowedProtocolsString =
- makeString(config.allowedProtocols, WifiConfiguration.Protocol.strings);
- if (config.allowedProtocols.cardinality() != 0 &&
- !mWifiStateTracker.setNetworkVariable(
- netId,
- WifiConfiguration.Protocol.varName,
- allowedProtocolsString)) {
- if (DBG) {
- Slog.d(TAG, "failed to set proto: "+
- allowedProtocolsString);
- }
- break setVariables;
- }
- String allowedAuthAlgorithmsString =
- makeString(config.allowedAuthAlgorithms, WifiConfiguration.AuthAlgorithm.strings);
- if (config.allowedAuthAlgorithms.cardinality() != 0 &&
- !mWifiStateTracker.setNetworkVariable(
- netId,
- WifiConfiguration.AuthAlgorithm.varName,
- allowedAuthAlgorithmsString)) {
- if (DBG) {
- Slog.d(TAG, "failed to set auth_alg: "+
- allowedAuthAlgorithmsString);
- }
- break setVariables;
- }
- String allowedPairwiseCiphersString =
- makeString(config.allowedPairwiseCiphers, WifiConfiguration.PairwiseCipher.strings);
- if (config.allowedPairwiseCiphers.cardinality() != 0 &&
- !mWifiStateTracker.setNetworkVariable(
- netId,
- WifiConfiguration.PairwiseCipher.varName,
- allowedPairwiseCiphersString)) {
- if (DBG) {
- Slog.d(TAG, "failed to set pairwise: "+
- allowedPairwiseCiphersString);
- }
- break setVariables;
- }
- String allowedGroupCiphersString =
- makeString(config.allowedGroupCiphers, WifiConfiguration.GroupCipher.strings);
- if (config.allowedGroupCiphers.cardinality() != 0 &&
- !mWifiStateTracker.setNetworkVariable(
- netId,
- WifiConfiguration.GroupCipher.varName,
- allowedGroupCiphersString)) {
- if (DBG) {
- Slog.d(TAG, "failed to set group: "+
- allowedGroupCiphersString);
- }
- break setVariables;
- }
- // Prevent client screw-up by passing in a WifiConfiguration we gave it
- // by preventing "*" as a key.
- if (config.preSharedKey != null && !config.preSharedKey.equals("*") &&
- !mWifiStateTracker.setNetworkVariable(
- netId,
- WifiConfiguration.pskVarName,
- config.preSharedKey)) {
- if (DBG) {
- Slog.d(TAG, "failed to set psk: "+config.preSharedKey);
- }
- break setVariables;
- }
- boolean hasSetKey = false;
- if (config.wepKeys != null) {
- for (int i = 0; i < config.wepKeys.length; i++) {
- // Prevent client screw-up by passing in a WifiConfiguration we gave it
- // by preventing "*" as a key.
- if (config.wepKeys[i] != null && !config.wepKeys[i].equals("*")) {
- if (!mWifiStateTracker.setNetworkVariable(
- netId,
- WifiConfiguration.wepKeyVarNames[i],
- config.wepKeys[i])) {
- if (DBG) {
- Slog.d(TAG,
- "failed to set wep_key"+i+": " +
- config.wepKeys[i]);
- }
- break setVariables;
- }
- hasSetKey = true;
- }
- }
- }
- if (hasSetKey) {
- if (!mWifiStateTracker.setNetworkVariable(
- netId,
- WifiConfiguration.wepTxKeyIdxVarName,
- Integer.toString(config.wepTxKeyIndex))) {
- if (DBG) {
- Slog.d(TAG,
- "failed to set wep_tx_keyidx: "+
- config.wepTxKeyIndex);
- }
- break setVariables;
- }
- }
- if (!mWifiStateTracker.setNetworkVariable(
- netId,
- WifiConfiguration.priorityVarName,
- Integer.toString(config.priority))) {
- if (DBG) {
- Slog.d(TAG, config.SSID + ": failed to set priority: "
- +config.priority);
- }
- break setVariables;
- }
- if (config.hiddenSSID && !mWifiStateTracker.setNetworkVariable(
- netId,
- WifiConfiguration.hiddenSSIDVarName,
- Integer.toString(config.hiddenSSID ? 1 : 0))) {
- if (DBG) {
- Slog.d(TAG, config.SSID + ": failed to set hiddenSSID: "+
- config.hiddenSSID);
- }
- break setVariables;
- }
- for (WifiConfiguration.EnterpriseField field
- : config.enterpriseFields) {
- String varName = field.varName();
- String value = field.value();
- if (value != null) {
- if (field != config.eap) {
- value = (value.length() == 0) ? "NULL" : convertToQuotedString(value);
- }
- if (!mWifiStateTracker.setNetworkVariable(
- netId,
- varName,
- value)) {
- if (DBG) {
- Slog.d(TAG, config.SSID + ": failed to set " + varName +
- ": " + value);
- }
- break setVariables;
- }
- }
- }
- return netId;
- }
认证类型管理类：
Java代码
- /**
- * Recognized key management schemes.
- */
- public static class KeyMgmt {
- private KeyMgmt() { }
- /** WPA is not used; plaintext or static WEP could be used. */
- public static final int NONE = 0;
- /** WPA pre-shared key (requires {@code preSharedKey} to be specified). */
- public static final int WPA_PSK = 1;
- /** WPA using EAP authentication. Generally used with an external authentication server. */
- public static final int WPA_EAP = 2;
- /** IEEE 802.1X using EAP authentication and (optionally) dynamically
- * generated WEP keys. */
- public static final int IEEE8021X = 3;
- public static final String varName = "key_mgmt";
- public static final String[] strings = { "NONE", "WPA_PSK", "WPA_EAP", "IEEE8021X" };
- }
