NetlinkHandler.cpp revision 19fb0c4e5ec6a10473666a2d45267fbc8305ba85 
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                NetlinkListener(listenerSocket) {
33    mNm = nm;
34}
35
36NetlinkHandler::~NetlinkHandler() {
37}
38
39int NetlinkHandler::start() {
40    return this->startListener();
41}
42
43int NetlinkHandler::stop() {
44    return this->stopListener();
45}
46
47void NetlinkHandler::onEvent(NetlinkEvent *evt) {
48    const char *subsys = evt->getSubsystem();
49    if (!subsys) {
50        LOGW("No subsystem found in netlink event");
51        return;
52    }
53    if (!strcmp(subsys, "net")) {
54        int action = evt->getAction();
55        if (action == evt->NlActionAdd) {
56            const char *iface = evt->findParam("INTERFACE");
57            notifyInterfaceAdded(iface);
58        } else if (action == evt->NlActionRemove) {
59            const char *iface = evt->findParam("INTERFACE");
60            notifyInterfaceRemoved(iface);
61        } else if (action == evt->NlActionChange) {
62            evt->dump();
63            const char *iface = evt->findParam("INTERFACE");
64            notifyInterfaceChanged("nana", true);
65        }
66    }
67}
68
69void NetlinkHandler::notifyInterfaceAdded(const char *name) {
70    char msg[255];
71    snprintf(msg, sizeof(msg), "Iface added %s", name);
72
73    mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange,
74            msg, false);
75}
76
77void NetlinkHandler::notifyInterfaceRemoved(const char *name) {
78    char msg[255];
79    snprintf(msg, sizeof(msg), "Iface removed %s", name);
80
81    mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange,
82            msg, false);
83}
84
85void NetlinkHandler::notifyInterfaceChanged(const char *name, bool isUp) {
86    char msg[255];
87    snprintf(msg, sizeof(msg), "Iface is %s %s", (isUp ? "up" : "down"), name);
88
89    mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange,
90            msg, false);
91}
92