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 #include <string.h> 20 21 #include <sys/socket.h> 22 #include <sys/select.h> 23 #include <sys/time.h> 24 #include <sys/types.h> 25 #include <sys/un.h> 26 27 #include <linux/netlink.h> 28 29 #define LOG_TAG "Vold" 30 31 #include <cutils/log.h> 32 33 #include "NetlinkManager.h" 34 #include "NetlinkHandler.h" 35 36 NetlinkManager *NetlinkManager::sInstance = NULL; 37 38 NetlinkManager *NetlinkManager::Instance() { 39 if (!sInstance) 40 sInstance = new NetlinkManager(); 41 return sInstance; 42 } 43 44 NetlinkManager::NetlinkManager() { 45 mBroadcaster = NULL; 46 } 47 48 NetlinkManager::~NetlinkManager() { 49 } 50 51 int NetlinkManager::start() { 52 struct sockaddr_nl nladdr; 53 int sz = 64 * 1024; 54 int on = 1; 55 56 memset(&nladdr, 0, sizeof(nladdr)); 57 nladdr.nl_family = AF_NETLINK; 58 nladdr.nl_pid = getpid(); 59 nladdr.nl_groups = 0xffffffff; 60 61 if ((mSock = socket(PF_NETLINK, SOCK_DGRAM | SOCK_CLOEXEC, 62 NETLINK_KOBJECT_UEVENT)) < 0) { 63 SLOGE("Unable to create uevent socket: %s", strerror(errno)); 64 return -1; 65 } 66 67 if (setsockopt(mSock, SOL_SOCKET, SO_RCVBUFFORCE, &sz, sizeof(sz)) < 0) { 68 SLOGE("Unable to set uevent socket SO_RCVBUFFORCE option: %s", strerror(errno)); 69 goto out; 70 } 71 72 if (setsockopt(mSock, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on)) < 0) { 73 SLOGE("Unable to set uevent socket SO_PASSCRED option: %s", strerror(errno)); 74 goto out; 75 } 76 77 if (bind(mSock, (struct sockaddr *) &nladdr, sizeof(nladdr)) < 0) { 78 SLOGE("Unable to bind uevent socket: %s", strerror(errno)); 79 goto out; 80 } 81 82 mHandler = new NetlinkHandler(mSock); 83 if (mHandler->start()) { 84 SLOGE("Unable to start NetlinkHandler: %s", strerror(errno)); 85 goto out; 86 } 87 88 return 0; 89 90 out: 91 close(mSock); 92 return -1; 93 } 94 95 int NetlinkManager::stop() { 96 int status = 0; 97 98 if (mHandler->stop()) { 99 SLOGE("Unable to stop NetlinkHandler: %s", strerror(errno)); 100 status = -1; 101 } 102 delete mHandler; 103 mHandler = NULL; 104 105 close(mSock); 106 mSock = -1; 107 108 return status; 109 } 110
