proxy_setting_note.txt

/*
* Android(6.0.1) proxy setting codes
* codes in 'frameworks/base/wifi'
 */

/*
* Android app 仅系统应用可修改wifi的proxy设置(WifiManager通过Binder将配置信息发送给WifiService处理)
* proxy由服务WifiService管理,WifiService修改proxy设置时仅更改在内存中管理的各wifi proxy信息列表
* ,以及将配置信息保存在 /data/misc/wifi/ipconfig.txt
 */


WifiConfigStore.addOrUpdateNetworkNative
	WifiConfigStore.writeIpAndProxyConfigurationsOnChange
		WifiConfigStore.writeIpAndProxyConfigurations
			IpConfigStore.writeIpAndProxyConfigurations
				IpConfigStore.writeConfig


//class IpConfigStore


public void writeIpAndProxyConfigurations(String filePath,
                                              final SparseArray<IpConfiguration> networks) {
        mWriter.write(filePath, new DelayedDiskWrite.Writer() {
            public void onWriteCalled(DataOutputStream out) throws IOException{
                out.writeInt(IPCONFIG_FILE_VERSION);//2
                for(int i = 0; i < networks.size(); i++) {
                    writeConfig(out, networks.keyAt(i), networks.valueAt(i));
                }
            }
        });
    }


 private boolean writeConfig(DataOutputStream out, int configKey,
                                IpConfiguration config) throws IOException {
        boolean written = false;

        try {
            switch (config.ipAssignment) {
                case STATIC:
                    out.writeUTF(IP_ASSIGNMENT_KEY);
                    out.writeUTF(config.ipAssignment.toString());
                    StaticIpConfiguration staticIpConfiguration = config.staticIpConfiguration;
                    if (staticIpConfiguration != null) {
                        if (staticIpConfiguration.ipAddress != null) {
                            LinkAddress ipAddress = staticIpConfiguration.ipAddress;
                            out.writeUTF(LINK_ADDRESS_KEY);
                            out.writeUTF(ipAddress.getAddress().getHostAddress());
                            out.writeInt(ipAddress.getPrefixLength());
                        }
                        if (staticIpConfiguration.gateway != null) {
                            out.writeUTF(GATEWAY_KEY);
                            out.writeInt(0);  // Default route.
                            out.writeInt(1);  // Have a gateway.
                            out.writeUTF(staticIpConfiguration.gateway.getHostAddress());
                        }
                        for (InetAddress inetAddr : staticIpConfiguration.dnsServers) {
                            out.writeUTF(DNS_KEY);
                            out.writeUTF(inetAddr.getHostAddress());
                        }
                    }
                    written = true;
                    break;
                case DHCP:
                    out.writeUTF(IP_ASSIGNMENT_KEY);
                    out.writeUTF(config.ipAssignment.toString());
                    written = true;
                    break;
                case UNASSIGNED:
                /* Ignore */
                    break;
                default:
                    loge("Ignore invalid ip assignment while writing");
                    break;
            }

            switch (config.proxySettings) {
                case STATIC:
                    ProxyInfo proxyProperties = config.httpProxy;
                    String exclusionList = proxyProperties.getExclusionListAsString();
                    out.writeUTF(PROXY_SETTINGS_KEY);
                    out.writeUTF(config.proxySettings.toString());
                    out.writeUTF(PROXY_HOST_KEY);
                    out.writeUTF(proxyProperties.getHost());
                    out.writeUTF(PROXY_PORT_KEY);
                    out.writeInt(proxyProperties.getPort());
                    if (exclusionList != null) {
                        out.writeUTF(EXCLUSION_LIST_KEY);
                        out.writeUTF(exclusionList);
                    }
                    written = true;
                    break;
                case PAC:
                    ProxyInfo proxyPacProperties = config.httpProxy;
                    out.writeUTF(PROXY_SETTINGS_KEY);
                    out.writeUTF(config.proxySettings.toString());
                    out.writeUTF(PROXY_PAC_FILE);
                    out.writeUTF(proxyPacProperties.getPacFileUrl().toString());
                    written = true;
                    break;
                case NONE:
                    out.writeUTF(PROXY_SETTINGS_KEY);
                    out.writeUTF(config.proxySettings.toString());
                    written = true;
                    break;
                case UNASSIGNED:
                    /* Ignore */
                        break;
                    default:
                        loge("Ignore invalid proxy settings while writing");
                        break;
            }

            if (written) {
                out.writeUTF(ID_KEY);
                out.writeInt(configKey);
            }
        } catch (NullPointerException e) {
            loge("Failure in writing " + config + e);
        }
        out.writeUTF(EOS);

        return written;
    }