关于之前在这提问路由表相关问题的后续结果

问题回顾

之前一直想着把后续写下的，事情太多给搞忘了，这几天有几个人加我 QQ 问我有没解决，我才想起来

以下是我这边经过修改可以达到预期效果的方法，仅供参考！ 思路是：先保证系统多个网卡能同时获取到 IP ，然后设置路由表分配什么流量走什么网卡

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当以太网连接后 Wi-Fi 仍可连 frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiStateMachine.java

private void setScanResults() { ... if (getCurrentState() == mRoamingState || getCurrentState() == mObtainingIpState || getCurrentState() == mScanModeState || getCurrentState() == mDisconnectingState || (getCurrentState() == mConnectedState && !mWifiConfigStore.enableAutoJoinWhenAssociated) || linkDebouncing || state == SupplicantState.ASSOCIATING || state == SupplicantState.AUTHENTICATING || state == SupplicantState.FOUR_WAY_HANDSHAKE || state == SupplicantState.GROUP_HANDSHAKE || (/* keep autojoin enabled if user has manually selected a wifi network, so as to make sure we reliably remain connected to this network */ mCOnnectionRequests== 0 && selection == null)) { // Dont attempt auto-joining again while we are already attempting to join // and/or obtaining Ip address attemptAutoJoin = false; } //add by a_bin for blzn network if(SystemProperties.getBoolean("ro.zwqx.blzn_network",false)){ attemptAutoJoin = true; } ... } 

连接高优先级的网络，低优先级的不断开 frameworks/base/services/core/java/com/android/server/ConnectivityService.java

private void teardownUnneededNetwork(NetworkAgentInfo nai) { //add by a_bin for blzn network if(SystemProperties.getBoolean("ro.zwqx.blzn_network",false)){ return; } } 

最后就是路由表的设置了,这里需要 root 权限 frameworks/base/services/core/java/com/android/server/ConnectivityService.java

private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp){ ... if(networkAgent.linkProperties.getInterfaceName().equals("wlan0")){ java.lang.Process pro = Runtime.getRuntime().exec("su"); DataOutputStream outputStream = new DataOutputStream(pro.getOutputStream()); outputStream.writeBytes("ip route flush table 3\n"); outputStream.writeBytes("ip route add dev wlan0 table 3\n"); outputStream.writeBytes("ip rule add to 10.1.0.0/16 table 3\n"); outputStream.writeBytes("ip route flush cache\n"); outputStream.writeBytes("exit\n"); outputStream.flush(); outputStream.close(); pro.waitFor(); }else if(networkAgent.linkProperties.getInterfaceName().equals("eth0")){ java.lang.Process pro = Runtime.getRuntime().exec("su"); DataOutputStream outputStream = new DataOutputStream(pro.getOutputStream()); outputStream.writeBytes("ip route flush table 1\n"); outputStream.writeBytes("ip route add dev eth0 table 1\n"); outputStream.writeBytes("ip rule add to 192.168.0.0/16 table 1\n"); outputStream.writeBytes("ip route flush cache\n"); outputStream.writeBytes("exit\n"); outputStream.flush(); outputStream.close(); pro.waitFor(); ok::updateLinkProperties()"); } ... }