NetlinkListener.cpp revision 17260b14682d4fe59dad3de2de8c9370e6ba9a71
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16#include <errno.h> 17 18#include <sys/types.h> 19#include <sys/socket.h> 20#include <linux/netlink.h> 21#include <string.h> 22 23#define LOG_TAG "NetlinkListener" 24#include <cutils/log.h> 25#include <cutils/uevent.h> 26 27#include <sysutils/NetlinkEvent.h> 28 29NetlinkListener::NetlinkListener(int socket, int format) : 30 SocketListener(socket, false), mFormat(format) { 31} 32 33bool NetlinkListener::onDataAvailable(SocketClient *cli) 34{ 35 int socket = cli->getSocket(); 36 ssize_t count; 37 38 count = TEMP_FAILURE_RETRY(uevent_kernel_multicast_recv(socket, mBuffer, sizeof(mBuffer))); 39 if (count < 0) { 40 SLOGE("recvmsg failed (%s)", strerror(errno)); 41 return false; 42 } 43 44 NetlinkEvent *evt = new NetlinkEvent(); 45 if (!evt->decode(mBuffer, count, mFormat)) { 46 SLOGE("Error decoding NetlinkEvent"); 47 } else { 48 onEvent(evt); 49 } 50 51 delete evt; 52 return true; 53} 54