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
NetlinkHandler(NetlinkManager * nm,int listenerSocket,int format)31 NetlinkHandler::NetlinkHandler(NetlinkManager *nm, int listenerSocket,
32 int format) :
33 NetlinkListener(listenerSocket, format) {
34 mNm = nm;
35 }
36
~NetlinkHandler()37 NetlinkHandler::~NetlinkHandler() {
38 }
39
start()40 int NetlinkHandler::start() {
41 return this->startListener();
42 }
43
stop()44 int NetlinkHandler::stop() {
45 return this->stopListener();
46 }
47
onEvent(NetlinkEvent * evt)48 void 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 } else if (!strcmp(subsys, "qlog")) {
72 const char *alertName = evt->findParam("ALERT_NAME");
73 const char *iface = evt->findParam("INTERFACE");
74 notifyQuotaLimitReached(alertName, iface);
75 }
76
77 }
78
notifyInterfaceAdded(const char * name)79 void NetlinkHandler::notifyInterfaceAdded(const char *name) {
80 char msg[255];
81 snprintf(msg, sizeof(msg), "Iface added %s", name);
82
83 mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange,
84 msg, false);
85 }
86
notifyInterfaceRemoved(const char * name)87 void NetlinkHandler::notifyInterfaceRemoved(const char *name) {
88 char msg[255];
89 snprintf(msg, sizeof(msg), "Iface removed %s", name);
90
91 mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange,
92 msg, false);
93 }
94
notifyInterfaceChanged(const char * name,bool isUp)95 void NetlinkHandler::notifyInterfaceChanged(const char *name, bool isUp) {
96 char msg[255];
97 snprintf(msg, sizeof(msg), "Iface changed %s %s", name,
98 (isUp ? "up" : "down"));
99
100 mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange,
101 msg, false);
102 }
103
notifyInterfaceLinkChanged(const char * name,bool isUp)104 void NetlinkHandler::notifyInterfaceLinkChanged(const char *name, bool isUp) {
105 char msg[255];
106 snprintf(msg, sizeof(msg), "Iface linkstate %s %s", name,
107 (isUp ? "up" : "down"));
108
109 mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange,
110 msg, false);
111 }
112
notifyQuotaLimitReached(const char * name,const char * iface)113 void NetlinkHandler::notifyQuotaLimitReached(const char *name, const char *iface) {
114 char msg[255];
115 snprintf(msg, sizeof(msg), "limit alert %s %s", name, iface);
116
117 mNm->getBroadcaster()->sendBroadcast(ResponseCode::BandwidthControl,
118 msg, false);
119 }
120