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 <errno.h>
20
21 #define LOG_TAG "Netd"
22
23 #include <cutils/log.h>
24
25 #include <sysutils/NetlinkEvent.h>
26 #include "NetlinkHandler.h"
27 #include "NetlinkManager.h"
28 #include "ResponseCode.h"
29
NetlinkHandler(NetlinkManager * nm,int listenerSocket)30 NetlinkHandler::NetlinkHandler(NetlinkManager *nm, int listenerSocket) :
31 NetlinkListener(listenerSocket) {
32 mNm = nm;
33 }
34
~NetlinkHandler()35 NetlinkHandler::~NetlinkHandler() {
36 }
37
start()38 int NetlinkHandler::start() {
39 return this->startListener();
40 }
41
stop()42 int NetlinkHandler::stop() {
43 return this->stopListener();
44 }
45
onEvent(NetlinkEvent * evt)46 void NetlinkHandler::onEvent(NetlinkEvent *evt) {
47 const char *subsys = evt->getSubsystem();
48 if (!subsys) {
49 LOGW("No subsystem found in netlink event");
50 return;
51 }
52 if (!strcmp(subsys, "net")) {
53 int action = evt->getAction();
54 if (action == evt->NlActionAdd) {
55 const char *iface = evt->findParam("INTERFACE");
56 notifyInterfaceAdded(iface);
57 } else if (action == evt->NlActionRemove) {
58 const char *iface = evt->findParam("INTERFACE");
59 notifyInterfaceRemoved(iface);
60 } else if (action == evt->NlActionChange) {
61 evt->dump();
62 const char *iface = evt->findParam("INTERFACE");
63 notifyInterfaceChanged("nana", true);
64 }
65 }
66 }
67
notifyInterfaceAdded(const char * name)68 void NetlinkHandler::notifyInterfaceAdded(const char *name) {
69 char msg[255];
70 snprintf(msg, sizeof(msg), "Iface added %s", name);
71
72 mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange,
73 msg, false);
74 }
75
notifyInterfaceRemoved(const char * name)76 void NetlinkHandler::notifyInterfaceRemoved(const char *name) {
77 char msg[255];
78 snprintf(msg, sizeof(msg), "Iface removed %s", name);
79
80 mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange,
81 msg, false);
82 }
83
notifyInterfaceChanged(const char * name,bool isUp)84 void NetlinkHandler::notifyInterfaceChanged(const char *name, bool isUp) {
85 char msg[255];
86 snprintf(msg, sizeof(msg), "Iface is %s %s", (isUp ? "up" : "down"), name);
87
88 mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange,
89 msg, false);
90 }
91