NetlinkListener.cpp revision ec16b9d47cacb0d873ee0ff80c919f49215c0005
1168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat/* 2168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat * Copyright (C) 2008 The Android Open Source Project 3168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat * 4168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat * Licensed under the Apache License, Version 2.0 (the "License"); 5168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat * you may not use this file except in compliance with the License. 6168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat * You may obtain a copy of the License at 7168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat * 8168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat * http://www.apache.org/licenses/LICENSE-2.0 9168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat * 10168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat * Unless required by applicable law or agreed to in writing, software 11168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat * distributed under the License is distributed on an "AS IS" BASIS, 12168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat * See the License for the specific language governing permissions and 14168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat * limitations under the License. 15168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat */ 16168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat#include <errno.h> 17168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat 18168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat#include <sys/types.h> 19168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat#include <sys/socket.h> 206bc08280108d020edfceff039f3955eebdc1e45cNick Kralevich#include <linux/netlink.h> 213d40729054803fae1c4d4bb5ac7554665a132b26San Mehat#include <string.h> 22168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat 23168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat#define LOG_TAG "NetlinkListener" 24168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat#include <cutils/log.h> 25531312e491079b7d62612fa35b64e8398f1b3283Nick Kralevich#include <cutils/uevent.h> 26168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat 27168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat#include <sysutils/NetlinkListener.h> 28168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat#include <sysutils/NetlinkEvent.h> 29168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat 30ec16b9d47cacb0d873ee0ff80c919f49215c0005Mike J. ChenNetlinkListener::NetlinkListener(int socket, int format) : 31168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat SocketListener(socket, false) { 32ec16b9d47cacb0d873ee0ff80c919f49215c0005Mike J. Chen mFormat = format; 33168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat} 34168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat 35fa644ffe944c01a9b00f8d7676d58394fabee285San Mehatbool NetlinkListener::onDataAvailable(SocketClient *cli) 36168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat{ 37fa644ffe944c01a9b00f8d7676d58394fabee285San Mehat int socket = cli->getSocket(); 386bc08280108d020edfceff039f3955eebdc1e45cNick Kralevich ssize_t count; 39168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat 4057de8b8f27f887ca8084671df777a4ac199ba647Nick Kralevich count = TEMP_FAILURE_RETRY(uevent_kernel_multicast_recv(socket, mBuffer, sizeof(mBuffer))); 41b59539d395218299f4b4288a26403fedb3d8124cDavid 'Digit' Turner if (count < 0) { 426bc08280108d020edfceff039f3955eebdc1e45cNick Kralevich SLOGE("recvmsg failed (%s)", strerror(errno)); 436bc08280108d020edfceff039f3955eebdc1e45cNick Kralevich return false; 446bc08280108d020edfceff039f3955eebdc1e45cNick Kralevich } 456bc08280108d020edfceff039f3955eebdc1e45cNick Kralevich 46168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat NetlinkEvent *evt = new NetlinkEvent(); 47ec16b9d47cacb0d873ee0ff80c919f49215c0005Mike J. Chen int err = evt->decode(mBuffer, count, mFormat); 48ec16b9d47cacb0d873ee0ff80c919f49215c0005Mike J. Chen 49ec16b9d47cacb0d873ee0ff80c919f49215c0005Mike J. Chen if (!err) { 507e8529a8b528fd30586aa037f15a31b29582c537San Mehat SLOGE("Error decoding NetlinkEvent"); 51ec16b9d47cacb0d873ee0ff80c919f49215c0005Mike J. Chen } else { 52ec16b9d47cacb0d873ee0ff80c919f49215c0005Mike J. Chen onEvent(evt); 53168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat } 54168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat 55168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat delete evt; 56168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat return true; 57168415b822cae1f8b54ef09c41c11a9b97b87f40San Mehat} 58