1f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat/* 2f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * Copyright (C) 2008 The Android Open Source Project 3f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * 4f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * Licensed under the Apache License, Version 2.0 (the "License"); 5f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * you may not use this file except in compliance with the License. 6f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * You may obtain a copy of the License at 7f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * 8f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * http://www.apache.org/licenses/LICENSE-2.0 9f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * 10f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * Unless required by applicable law or agreed to in writing, software 11f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * distributed under the License is distributed on an "AS IS" BASIS, 12f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * See the License for the specific language governing permissions and 14f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat * limitations under the License. 15f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat */ 16f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 17f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat#include <stdio.h> 18f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat#include <errno.h> 19f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 20f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat#include <sys/socket.h> 21f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat#include <sys/select.h> 22f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat#include <sys/time.h> 23f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat#include <sys/types.h> 24f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat#include <sys/un.h> 25f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 26f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat#include <linux/netlink.h> 27f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 28f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat#define LOG_TAG "Vold" 29f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 30f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat#include <cutils/log.h> 31f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 32f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat#include "NetlinkManager.h" 33f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat#include "NetlinkHandler.h" 34f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 35f1b736bc5605e92e917ab27f5abf3ba839be2270San MehatNetlinkManager *NetlinkManager::sInstance = NULL; 36f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 37f1b736bc5605e92e917ab27f5abf3ba839be2270San MehatNetlinkManager *NetlinkManager::Instance() { 38f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat if (!sInstance) 39f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat sInstance = new NetlinkManager(); 40f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat return sInstance; 41f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat} 42f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 43f1b736bc5605e92e917ab27f5abf3ba839be2270San MehatNetlinkManager::NetlinkManager() { 44f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat mBroadcaster = NULL; 45f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat} 46f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 47f1b736bc5605e92e917ab27f5abf3ba839be2270San MehatNetlinkManager::~NetlinkManager() { 48f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat} 49f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 50f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehatint NetlinkManager::start() { 51f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat struct sockaddr_nl nladdr; 52f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat int sz = 64 * 1024; 53c51920c82463b240e2be0430849837d6fdc5352eNick Kralevich int on = 1; 54f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 55f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat memset(&nladdr, 0, sizeof(nladdr)); 56f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat nladdr.nl_family = AF_NETLINK; 57f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat nladdr.nl_pid = getpid(); 58f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat nladdr.nl_groups = 0xffffffff; 59f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 60f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat if ((mSock = socket(PF_NETLINK, 61f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat SOCK_DGRAM,NETLINK_KOBJECT_UEVENT)) < 0) { 6297ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Unable to create uevent socket: %s", strerror(errno)); 63f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat return -1; 64f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat } 65f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 66f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat if (setsockopt(mSock, SOL_SOCKET, SO_RCVBUFFORCE, &sz, sizeof(sz)) < 0) { 67c51920c82463b240e2be0430849837d6fdc5352eNick Kralevich SLOGE("Unable to set uevent socket SO_RECBUFFORCE option: %s", strerror(errno)); 68c51920c82463b240e2be0430849837d6fdc5352eNick Kralevich return -1; 69c51920c82463b240e2be0430849837d6fdc5352eNick Kralevich } 70c51920c82463b240e2be0430849837d6fdc5352eNick Kralevich 71c51920c82463b240e2be0430849837d6fdc5352eNick Kralevich if (setsockopt(mSock, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on)) < 0) { 72c51920c82463b240e2be0430849837d6fdc5352eNick Kralevich SLOGE("Unable to set uevent socket SO_PASSCRED option: %s", strerror(errno)); 73f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat return -1; 74f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat } 75f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 76f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat if (bind(mSock, (struct sockaddr *) &nladdr, sizeof(nladdr)) < 0) { 7797ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Unable to bind uevent socket: %s", strerror(errno)); 78f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat return -1; 79f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat } 80f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 81f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat mHandler = new NetlinkHandler(mSock); 82f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat if (mHandler->start()) { 8397ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Unable to start NetlinkHandler: %s", strerror(errno)); 84f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat return -1; 85f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat } 86f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat return 0; 87f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat} 88f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 89f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehatint NetlinkManager::stop() { 90f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat if (mHandler->stop()) { 9197ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Unable to stop NetlinkHandler: %s", strerror(errno)); 92f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat return -1; 93f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat } 94f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat delete mHandler; 95f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat mHandler = NULL; 96f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 97f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat close(mSock); 98f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat mSock = -1; 99f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat 100f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat return 0; 101f1b736bc5605e92e917ab27f5abf3ba839be2270San Mehat} 102