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 <stdlib.h> 19#include <string.h> 20#include <errno.h> 21 22#define LOG_TAG "Netd" 23 24#include <cutils/log.h> 25 26#include <sysutils/NetlinkEvent.h> 27#include "NetlinkHandler.h" 28#include "NetlinkManager.h" 29#include "ResponseCode.h" 30 31NetlinkHandler::NetlinkHandler(NetlinkManager *nm, int listenerSocket, 32 int format) : 33 NetlinkListener(listenerSocket, format) { 34 mNm = nm; 35} 36 37NetlinkHandler::~NetlinkHandler() { 38} 39 40int NetlinkHandler::start() { 41 return this->startListener(); 42} 43 44int NetlinkHandler::stop() { 45 return this->stopListener(); 46} 47 48void NetlinkHandler::onEvent(NetlinkEvent *evt) { 49 const char *subsys = evt->getSubsystem(); 50 if (!subsys) { 51 ALOGW("No subsystem found in netlink event"); 52 return; 53 } 54 55 if (!strcmp(subsys, "net")) { 56 int action = evt->getAction(); 57 const char *iface = evt->findParam("INTERFACE"); 58 59 if (action == evt->NlActionAdd) { 60 notifyInterfaceAdded(iface); 61 } else if (action == evt->NlActionRemove) { 62 notifyInterfaceRemoved(iface); 63 } else if (action == evt->NlActionChange) { 64 evt->dump(); 65 notifyInterfaceChanged("nana", true); 66 } else if (action == evt->NlActionLinkUp) { 67 notifyInterfaceLinkChanged(iface, true); 68 } else if (action == evt->NlActionLinkDown) { 69 notifyInterfaceLinkChanged(iface, false); 70 } else if (action == evt->NlActionAddressUpdated || 71 action == evt->NlActionAddressRemoved) { 72 const char *address = evt->findParam("ADDRESS"); 73 const char *flags = evt->findParam("FLAGS"); 74 const char *scope = evt->findParam("SCOPE"); 75 if (iface && flags && scope) { 76 notifyAddressChanged(action, address, iface, flags, scope); 77 } 78 } 79 80 } else if (!strcmp(subsys, "qlog")) { 81 const char *alertName = evt->findParam("ALERT_NAME"); 82 const char *iface = evt->findParam("INTERFACE"); 83 notifyQuotaLimitReached(alertName, iface); 84 85 } else if (!strcmp(subsys, "xt_idletimer")) { 86 int action = evt->getAction(); 87 const char *label = evt->findParam("LABEL"); 88 const char *state = evt->findParam("STATE"); 89 // if no LABEL, use INTERFACE instead 90 if (label == NULL) { 91 label = evt->findParam("INTERFACE"); 92 } 93 if (state) 94 notifyInterfaceClassActivity(label, !strcmp("active", state)); 95 96#if !LOG_NDEBUG 97 } else if (strcmp(subsys, "platform") && strcmp(subsys, "backlight")) { 98 /* It is not a VSYNC or a backlight event */ 99 ALOGV("unexpected event from subsystem %s", subsys); 100#endif 101 } 102} 103 104void NetlinkHandler::notifyInterfaceAdded(const char *name) { 105 char msg[255]; 106 snprintf(msg, sizeof(msg), "Iface added %s", name); 107 108 mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange, 109 msg, false); 110} 111 112void NetlinkHandler::notifyInterfaceRemoved(const char *name) { 113 char msg[255]; 114 snprintf(msg, sizeof(msg), "Iface removed %s", name); 115 116 mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange, 117 msg, false); 118} 119 120void NetlinkHandler::notifyInterfaceChanged(const char *name, bool isUp) { 121 char msg[255]; 122 snprintf(msg, sizeof(msg), "Iface changed %s %s", name, 123 (isUp ? "up" : "down")); 124 125 mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange, 126 msg, false); 127} 128 129void NetlinkHandler::notifyInterfaceLinkChanged(const char *name, bool isUp) { 130 char msg[255]; 131 snprintf(msg, sizeof(msg), "Iface linkstate %s %s", name, 132 (isUp ? "up" : "down")); 133 134 mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange, 135 msg, false); 136} 137 138void NetlinkHandler::notifyQuotaLimitReached(const char *name, const char *iface) { 139 char msg[255]; 140 snprintf(msg, sizeof(msg), "limit alert %s %s", name, iface); 141 142 mNm->getBroadcaster()->sendBroadcast(ResponseCode::BandwidthControl, 143 msg, false); 144} 145 146void NetlinkHandler::notifyInterfaceClassActivity(const char *name, 147 bool isActive) { 148 char msg[255]; 149 150 snprintf(msg, sizeof(msg), "IfaceClass %s %s", 151 isActive ? "active" : "idle", name); 152 ALOGV("Broadcasting interface activity msg: %s", msg); 153 mNm->getBroadcaster()->sendBroadcast( 154 ResponseCode::InterfaceClassActivity, msg, false); 155} 156 157void NetlinkHandler::notifyAddressChanged(int action, const char *addr, 158 const char *iface, const char *flags, 159 const char *scope) { 160 char msg[255]; 161 snprintf(msg, sizeof(msg), "Address %s %s %s %s %s", 162 (action == NetlinkEvent::NlActionAddressUpdated) ? 163 "updated" : "removed", addr, iface, flags, scope); 164 165 mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceAddressChange, 166 msg, false); 167} 168