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 ALOGW("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 } else if (!strcmp(subsys, "qlog")) {
73 const char *alertName = evt->findParam("ALERT_NAME");
74 const char *iface = evt->findParam("INTERFACE");
75 notifyQuotaLimitReached(alertName, iface);
76
77 } else if (!strcmp(subsys, "xt_idletimer")) {
78 int action = evt->getAction();
79 const char *label = evt->findParam("LABEL");
80 const char *state = evt->findParam("STATE");
81 // if no LABEL, use INTERFACE instead
82 if (label == NULL) {
83 label = evt->findParam("INTERFACE");
84 }
85 if (state)
86 notifyInterfaceClassActivity(label, !strcmp("active", state));
87
88 #if !LOG_NDEBUG
89 } else if (strcmp(subsys, "platform") && strcmp(subsys, "backlight")) {
90 /* It is not a VSYNC or a backlight event */
91 ALOGV("unexpected event from subsystem %s", subsys);
92 #endif
93 }
94 }
95
notifyInterfaceAdded(const char * name)96 void NetlinkHandler::notifyInterfaceAdded(const char *name) {
97 char msg[255];
98 snprintf(msg, sizeof(msg), "Iface added %s", name);
99
100 mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange,
101 msg, false);
102 }
103
notifyInterfaceRemoved(const char * name)104 void NetlinkHandler::notifyInterfaceRemoved(const char *name) {
105 char msg[255];
106 snprintf(msg, sizeof(msg), "Iface removed %s", name);
107
108 mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange,
109 msg, false);
110 }
111
notifyInterfaceChanged(const char * name,bool isUp)112 void NetlinkHandler::notifyInterfaceChanged(const char *name, bool isUp) {
113 char msg[255];
114 snprintf(msg, sizeof(msg), "Iface changed %s %s", name,
115 (isUp ? "up" : "down"));
116
117 mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange,
118 msg, false);
119 }
120
notifyInterfaceLinkChanged(const char * name,bool isUp)121 void NetlinkHandler::notifyInterfaceLinkChanged(const char *name, bool isUp) {
122 char msg[255];
123 snprintf(msg, sizeof(msg), "Iface linkstate %s %s", name,
124 (isUp ? "up" : "down"));
125
126 mNm->getBroadcaster()->sendBroadcast(ResponseCode::InterfaceChange,
127 msg, false);
128 }
129
notifyQuotaLimitReached(const char * name,const char * iface)130 void NetlinkHandler::notifyQuotaLimitReached(const char *name, const char *iface) {
131 char msg[255];
132 snprintf(msg, sizeof(msg), "limit alert %s %s", name, iface);
133
134 mNm->getBroadcaster()->sendBroadcast(ResponseCode::BandwidthControl,
135 msg, false);
136 }
137
notifyInterfaceClassActivity(const char * name,bool isActive)138 void NetlinkHandler::notifyInterfaceClassActivity(const char *name,
139 bool isActive) {
140 char msg[255];
141
142 snprintf(msg, sizeof(msg), "IfaceClass %s %s",
143 isActive ? "active" : "idle", name);
144 ALOGV("Broadcasting interface activity msg: %s", msg);
145 mNm->getBroadcaster()->sendBroadcast(
146 ResponseCode::InterfaceClassActivity, msg, false);
147 }
148