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 <errno.h>
17
18 #include <sys/types.h>
19 #include <sys/socket.h>
20 #include <linux/netlink.h>
21 #include <string.h>
22
23 #define LOG_TAG "NetlinkListener"
24 #include <cutils/log.h>
25 #include <cutils/uevent.h>
26
27 #include <sysutils/NetlinkEvent.h>
28
29 #if 1
30 /* temporary version until we can get Motorola to update their
31 * ril.so. Their prebuilt ril.so is using this private class
32 * so changing the NetlinkListener() constructor breaks their ril.
33 */
NetlinkListener(int socket)34 NetlinkListener::NetlinkListener(int socket) :
35 SocketListener(socket, false) {
36 mFormat = NETLINK_FORMAT_ASCII;
37 }
38 #endif
39
NetlinkListener(int socket,int format)40 NetlinkListener::NetlinkListener(int socket, int format) :
41 SocketListener(socket, false), mFormat(format) {
42 }
43
onDataAvailable(SocketClient * cli)44 bool NetlinkListener::onDataAvailable(SocketClient *cli)
45 {
46 int socket = cli->getSocket();
47 ssize_t count;
48 uid_t uid = -1;
49
50 count = TEMP_FAILURE_RETRY(uevent_kernel_multicast_uid_recv(
51 socket, mBuffer, sizeof(mBuffer), &uid));
52 if (count < 0) {
53 if (uid > 0)
54 LOG_EVENT_INT(65537, uid);
55 SLOGE("recvmsg failed (%s)", strerror(errno));
56 return false;
57 }
58
59 NetlinkEvent *evt = new NetlinkEvent();
60 if (evt->decode(mBuffer, count, mFormat)) {
61 onEvent(evt);
62 } else if (mFormat != NETLINK_FORMAT_BINARY) {
63 // Don't complain if parseBinaryNetlinkMessage returns false. That can
64 // just mean that the buffer contained no messages we're interested in.
65 SLOGE("Error decoding NetlinkEvent");
66 }
67
68 delete evt;
69 return true;
70 }
71