upload android base code part6
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232
android/system/netd/server/NetlinkHandler.cpp
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232
android/system/netd/server/NetlinkHandler.cpp
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/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#define LOG_TAG "Netd"
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#include <cutils/log.h>
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#include <netutils/ifc.h>
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#include <sysutils/NetlinkEvent.h>
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#include "NetlinkHandler.h"
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#include "NetlinkManager.h"
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#include "ResponseCode.h"
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#include "SockDiag.h"
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static const char *kUpdated = "updated";
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static const char *kRemoved = "removed";
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namespace android {
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namespace net {
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NetlinkHandler::NetlinkHandler(NetlinkManager *nm, int listenerSocket,
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int format) :
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NetlinkListener(listenerSocket, format) {
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mNm = nm;
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}
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NetlinkHandler::~NetlinkHandler() {
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}
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int NetlinkHandler::start() {
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return this->startListener();
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}
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int NetlinkHandler::stop() {
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return this->stopListener();
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}
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void NetlinkHandler::onEvent(NetlinkEvent *evt) {
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const char *subsys = evt->getSubsystem();
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if (!subsys) {
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ALOGW("No subsystem found in netlink event");
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return;
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}
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if (!strcmp(subsys, "net")) {
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NetlinkEvent::Action action = evt->getAction();
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const char *iface = evt->findParam("INTERFACE");
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if (action == NetlinkEvent::Action::kAdd) {
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notifyInterfaceAdded(iface);
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} else if (action == NetlinkEvent::Action::kRemove) {
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notifyInterfaceRemoved(iface);
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} else if (action == NetlinkEvent::Action::kChange) {
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evt->dump();
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notifyInterfaceChanged("nana", true);
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} else if (action == NetlinkEvent::Action::kLinkUp) {
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notifyInterfaceLinkChanged(iface, true);
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} else if (action == NetlinkEvent::Action::kLinkDown) {
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notifyInterfaceLinkChanged(iface, false);
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} else if (action == NetlinkEvent::Action::kAddressUpdated ||
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action == NetlinkEvent::Action::kAddressRemoved) {
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const char *address = evt->findParam("ADDRESS");
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const char *flags = evt->findParam("FLAGS");
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const char *scope = evt->findParam("SCOPE");
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if (action == NetlinkEvent::Action::kAddressRemoved && iface && address) {
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// Note: if this interface was deleted, iface is "" and we don't notify.
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SockDiag sd;
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if (sd.open()) {
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char addrstr[INET6_ADDRSTRLEN];
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strncpy(addrstr, address, sizeof(addrstr));
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char *slash = strchr(addrstr, '/');
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if (slash) {
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*slash = '\0';
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}
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int ret = sd.destroySockets(addrstr);
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if (ret < 0) {
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ALOGE("Error destroying sockets: %s", strerror(ret));
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}
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} else {
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ALOGE("Error opening NETLINK_SOCK_DIAG socket: %s", strerror(errno));
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}
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}
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if (iface && iface[0] && address && flags && scope) {
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notifyAddressChanged(action, address, iface, flags, scope);
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}
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} else if (action == NetlinkEvent::Action::kRdnss) {
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const char *lifetime = evt->findParam("LIFETIME");
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const char *servers = evt->findParam("SERVERS");
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if (lifetime && servers) {
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notifyInterfaceDnsServers(iface, lifetime, servers);
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}
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} else if (action == NetlinkEvent::Action::kRouteUpdated ||
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action == NetlinkEvent::Action::kRouteRemoved) {
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const char *route = evt->findParam("ROUTE");
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const char *gateway = evt->findParam("GATEWAY");
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const char *iface = evt->findParam("INTERFACE");
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if (route && (gateway || iface)) {
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notifyRouteChange(action, route, gateway, iface);
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}
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}
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} else if (!strcmp(subsys, "qlog") || !strcmp(subsys, "xt_quota2")) {
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const char *alertName = evt->findParam("ALERT_NAME");
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const char *iface = evt->findParam("INTERFACE");
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notifyQuotaLimitReached(alertName, iface);
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} else if (!strcmp(subsys, "strict")) {
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const char *uid = evt->findParam("UID");
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const char *hex = evt->findParam("HEX");
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notifyStrictCleartext(uid, hex);
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} else if (!strcmp(subsys, "xt_idletimer")) {
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const char *label = evt->findParam("INTERFACE");
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const char *state = evt->findParam("STATE");
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const char *timestamp = evt->findParam("TIME_NS");
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const char *uid = evt->findParam("UID");
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if (state)
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notifyInterfaceClassActivity(label, !strcmp("active", state),
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timestamp, uid);
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#if !LOG_NDEBUG
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} else if (strcmp(subsys, "platform") && strcmp(subsys, "backlight")) {
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/* It is not a VSYNC or a backlight event */
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ALOGV("unexpected event from subsystem %s", subsys);
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#endif
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}
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}
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void NetlinkHandler::notify(int code, const char *format, ...) {
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char *msg;
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va_list args;
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va_start(args, format);
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if (vasprintf(&msg, format, args) >= 0) {
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mNm->getBroadcaster()->sendBroadcast(code, msg, false);
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free(msg);
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} else {
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SLOGE("Failed to send notification: vasprintf: %s", strerror(errno));
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}
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va_end(args);
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}
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void NetlinkHandler::notifyInterfaceAdded(const char *name) {
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notify(ResponseCode::InterfaceChange, "Iface added %s", name);
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}
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void NetlinkHandler::notifyInterfaceRemoved(const char *name) {
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notify(ResponseCode::InterfaceChange, "Iface removed %s", name);
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}
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void NetlinkHandler::notifyInterfaceChanged(const char *name, bool isUp) {
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notify(ResponseCode::InterfaceChange,
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"Iface changed %s %s", name, (isUp ? "up" : "down"));
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}
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void NetlinkHandler::notifyInterfaceLinkChanged(const char *name, bool isUp) {
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notify(ResponseCode::InterfaceChange,
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"Iface linkstate %s %s", name, (isUp ? "up" : "down"));
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}
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void NetlinkHandler::notifyQuotaLimitReached(const char *name, const char *iface) {
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notify(ResponseCode::BandwidthControl, "limit alert %s %s", name, iface);
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}
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void NetlinkHandler::notifyInterfaceClassActivity(const char *name,
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bool isActive,
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const char *timestamp,
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const char *uid) {
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if (timestamp == NULL)
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notify(ResponseCode::InterfaceClassActivity,
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"IfaceClass %s %s", isActive ? "active" : "idle", name);
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else if (uid != NULL && isActive)
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notify(ResponseCode::InterfaceClassActivity,
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"IfaceClass active %s %s %s", name, timestamp, uid);
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else
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notify(ResponseCode::InterfaceClassActivity,
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"IfaceClass %s %s %s", isActive ? "active" : "idle", name, timestamp);
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}
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void NetlinkHandler::notifyAddressChanged(NetlinkEvent::Action action, const char *addr,
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const char *iface, const char *flags,
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const char *scope) {
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notify(ResponseCode::InterfaceAddressChange,
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"Address %s %s %s %s %s",
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(action == NetlinkEvent::Action::kAddressUpdated) ? kUpdated : kRemoved,
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addr, iface, flags, scope);
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}
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void NetlinkHandler::notifyInterfaceDnsServers(const char *iface,
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const char *lifetime,
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const char *servers) {
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notify(ResponseCode::InterfaceDnsInfo, "DnsInfo servers %s %s %s",
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iface, lifetime, servers);
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}
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void NetlinkHandler::notifyRouteChange(NetlinkEvent::Action action, const char *route,
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const char *gateway, const char *iface) {
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notify(ResponseCode::RouteChange,
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"Route %s %s%s%s%s%s",
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(action == NetlinkEvent::Action::kRouteUpdated) ? kUpdated : kRemoved,
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route,
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(gateway && *gateway) ? " via " : "",
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gateway,
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(iface && *iface) ? " dev " : "",
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iface);
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}
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void NetlinkHandler::notifyStrictCleartext(const char* uid, const char* hex) {
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notify(ResponseCode::StrictCleartext, "%s %s", uid, hex);
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}
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} // namespace net
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} // namespace android
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