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 #include <stdlib.h>
17 #include <string.h>
18
19 #define LOG_TAG "NetlinkEvent"
20 #include <cutils/log.h>
21
22 #include <sysutils/NetlinkEvent.h>
23
24 const int NetlinkEvent::NlActionUnknown = 0;
25 const int NetlinkEvent::NlActionAdd = 1;
26 const int NetlinkEvent::NlActionRemove = 2;
27 const int NetlinkEvent::NlActionChange = 3;
28
NetlinkEvent()29 NetlinkEvent::NetlinkEvent() {
30 mAction = NlActionUnknown;
31 memset(mParams, 0, sizeof(mParams));
32 mPath = NULL;
33 mSubsystem = NULL;
34 }
35
~NetlinkEvent()36 NetlinkEvent::~NetlinkEvent() {
37 int i;
38 if (mPath)
39 free(mPath);
40 if (mSubsystem)
41 free(mSubsystem);
42 for (i = 0; i < NL_PARAMS_MAX; i++) {
43 if (!mParams[i])
44 break;
45 free(mParams[i]);
46 }
47 }
48
dump()49 void NetlinkEvent::dump() {
50 int i;
51
52 for (i = 0; i < NL_PARAMS_MAX; i++) {
53 if (!mParams[i])
54 break;
55 SLOGD("NL param '%s'\n", mParams[i]);
56 }
57 }
58
decode(char * buffer,int size)59 bool NetlinkEvent::decode(char *buffer, int size) {
60 char *s = buffer;
61 char *end;
62 int param_idx = 0;
63 int i;
64 int first = 1;
65
66 end = s + size;
67 while (s < end) {
68 if (first) {
69 char *p;
70 for (p = s; *p != '@'; p++);
71 p++;
72 mPath = strdup(p);
73 first = 0;
74 } else {
75 if (!strncmp(s, "ACTION=", strlen("ACTION="))) {
76 char *a = s + strlen("ACTION=");
77 if (!strcmp(a, "add"))
78 mAction = NlActionAdd;
79 else if (!strcmp(a, "remove"))
80 mAction = NlActionRemove;
81 else if (!strcmp(a, "change"))
82 mAction = NlActionChange;
83 } else if (!strncmp(s, "SEQNUM=", strlen("SEQNUM=")))
84 mSeq = atoi(s + strlen("SEQNUM="));
85 else if (!strncmp(s, "SUBSYSTEM=", strlen("SUBSYSTEM=")))
86 mSubsystem = strdup(s + strlen("SUBSYSTEM="));
87 else
88 mParams[param_idx++] = strdup(s);
89 }
90 s+= strlen(s) + 1;
91 }
92 return true;
93 }
94
findParam(const char * paramName)95 const char *NetlinkEvent::findParam(const char *paramName) {
96 int i;
97
98 for (i = 0; i < NL_PARAMS_MAX; i++) {
99 if (!mParams[i])
100 break;
101 if (!strncmp(mParams[i], paramName, strlen(paramName)))
102 return &mParams[i][strlen(paramName) + 1];
103 }
104
105 SLOGE("NetlinkEvent::FindParam(): Parameter '%s' not found", paramName);
106 return NULL;
107 }
108