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 17 #include <stdio.h> 18 #include <errno.h> 19 20 #include <sys/socket.h> 21 #include <sys/select.h> 22 #include <sys/time.h> 23 #include <sys/types.h> 24 #include <sys/un.h> 25 26 #include <linux/netlink.h> 27 28 #define LOG_TAG "Vold" 29 30 #include <cutils/log.h> 31 32 #include "NetlinkManager.h" 33 #include "NetlinkHandler.h" 34 35 NetlinkManager *NetlinkManager::sInstance = NULL; 36 37 NetlinkManager *NetlinkManager::Instance() { 38 if (!sInstance) 39 sInstance = new NetlinkManager(); 40 return sInstance; 41 } 42 43 NetlinkManager::NetlinkManager() { 44 mBroadcaster = NULL; 45 } 46 47 NetlinkManager::~NetlinkManager() { 48 } 49 50 int NetlinkManager::start() { 51 struct sockaddr_nl nladdr; 52 int sz = 64 * 1024; 53 int on = 1; 54 55 memset(&nladdr, 0, sizeof(nladdr)); 56 nladdr.nl_family = AF_NETLINK; 57 nladdr.nl_pid = getpid(); 58 nladdr.nl_groups = 0xffffffff; 59 60 if ((mSock = socket(PF_NETLINK, 61 SOCK_DGRAM,NETLINK_KOBJECT_UEVENT)) < 0) { 62 SLOGE("Unable to create uevent socket: %s", strerror(errno)); 63 return -1; 64 } 65 66 if (setsockopt(mSock, SOL_SOCKET, SO_RCVBUFFORCE, &sz, sizeof(sz)) < 0) { 67 SLOGE("Unable to set uevent socket SO_RCVBUFFORCE option: %s", strerror(errno)); 68 goto out; 69 } 70 71 if (setsockopt(mSock, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on)) < 0) { 72 SLOGE("Unable to set uevent socket SO_PASSCRED option: %s", strerror(errno)); 73 goto out; 74 } 75 76 if (bind(mSock, (struct sockaddr *) &nladdr, sizeof(nladdr)) < 0) { 77 SLOGE("Unable to bind uevent socket: %s", strerror(errno)); 78 goto out; 79 } 80 81 mHandler = new NetlinkHandler(mSock); 82 if (mHandler->start()) { 83 SLOGE("Unable to start NetlinkHandler: %s", strerror(errno)); 84 goto out; 85 } 86 87 return 0; 88 89 out: 90 close(mSock); 91 return -1; 92 } 93 94 int NetlinkManager::stop() { 95 int status = 0; 96 97 if (mHandler->stop()) { 98 SLOGE("Unable to stop NetlinkHandler: %s", strerror(errno)); 99 status = -1; 100 } 101 delete mHandler; 102 mHandler = NULL; 103 104 close(mSock); 105 mSock = -1; 106 107 return status; 108 } 109
