NetlinkHandler.cpp revision a583f8be6126d3116311e96c6fd8bafcbaf2b431 
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        LOGW("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}
73
74void NetlinkHandler::notifyInterfaceAdded(const char *name) {
75    char msg[255];
76    snprintf(msg, sizeof(msg), "Iface added %s", name);
77
78    mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange,
79            msg, false);
80}
81
82void NetlinkHandler::notifyInterfaceRemoved(const char *name) {
83    char msg[255];
84    snprintf(msg, sizeof(msg), "Iface removed %s", name);
85
86    mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange,
87            msg, false);
88}
89
90void NetlinkHandler::notifyInterfaceChanged(const char *name, bool isUp) {
91    char msg[255];
92    snprintf(msg, sizeof(msg), "Iface changed %s %s", name,
93             (isUp ? "up" : "down"));
94
95    mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange,
96            msg, false);
97}
98
99void NetlinkHandler::notifyInterfaceLinkChanged(const char *name, bool isUp) {
100    char msg[255];
101    snprintf(msg, sizeof(msg), "Iface linkstate %s %s", name,
102             (isUp ? "up" : "down"));
103
104    mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange,
105            msg, false);
106}
107