NetlinkHandler.cpp revision 98f65d32b1530b4da6050e38d52f955710577efb
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 } 71 72 } else if (!strcmp(subsys, "qlog")) { 73 const char *alertName = evt->findParam("ALERT_NAME"); 74 const char *iface = evt->findParam("INTERFACE"); 75 notifyQuotaLimitReached(alertName, iface); 76 77 } else if (!strcmp(subsys, "xt_idletimer")) { 78 int action = evt->getAction(); 79 const char *label = evt->findParam("LABEL"); 80 const char *state = evt->findParam("STATE"); 81 // if no LABEL, use INTERFACE instead 82 if (label == NULL) { 83 label = evt->findParam("INTERFACE"); 84 } 85 if (state) 86 notifyInterfaceClassActivity(label, !strcmp("active", state)); 87 88#if !LOG_NDEBUG 89 } else if (strcmp(subsys, "platform") && strcmp(subsys, "backlight")) { 90 /* It is not a VSYNC or a backlight event */ 91 ALOGV("unexpected event from subsystem %s", subsys); 92#endif 93 } 94} 95 96void NetlinkHandler::notifyInterfaceAdded(const char *name) { 97 char msg[255]; 98 snprintf(msg, sizeof(msg), "Iface added %s", name); 99 100 mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange, 101 msg, false); 102} 103 104void NetlinkHandler::notifyInterfaceRemoved(const char *name) { 105 char msg[255]; 106 snprintf(msg, sizeof(msg), "Iface removed %s", name); 107 108 mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange, 109 msg, false); 110} 111 112void NetlinkHandler::notifyInterfaceChanged(const char *name, bool isUp) { 113 char msg[255]; 114 snprintf(msg, sizeof(msg), "Iface changed %s %s", name, 115 (isUp ? "up" : "down")); 116 117 mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange, 118 msg, false); 119} 120 121void NetlinkHandler::notifyInterfaceLinkChanged(const char *name, bool isUp) { 122 char msg[255]; 123 snprintf(msg, sizeof(msg), "Iface linkstate %s %s", name, 124 (isUp ? "up" : "down")); 125 126 mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange, 127 msg, false); 128} 129 130void NetlinkHandler::notifyQuotaLimitReached(const char *name, const char *iface) { 131 char msg[255]; 132 snprintf(msg, sizeof(msg), "limit alert %s %s", name, iface); 133 134 mNm->getBroadcaster()->sendBroadcast(ResponseCode::BandwidthControl, 135 msg, false); 136} 137 138void NetlinkHandler::notifyInterfaceClassActivity(const char *name, 139 bool isActive) { 140 char msg[255]; 141 142 snprintf(msg, sizeof(msg), "Iface %s %s", name, 143 isActive ? "active" : "idle"); 144 ALOGV("Broadcasting interface activity msg: %s", msg); 145 mNm->getBroadcaster()->sendBroadcast( 146 isActive ? ResponseCode::InterfaceClassActive 147 : ResponseCode::InterfaceClassIdle, 148 msg, false); 149} 150