/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "NetlinkListener"
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#include <errno.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <linux/netlink.h> /* out of order because must follow sys/socket.h */
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#include <cutils/uevent.h>
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#include <log/log.h>
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#include <sysutils/NetlinkEvent.h>
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#if 1
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/* temporary version until we can get Motorola to update their
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* ril.so. Their prebuilt ril.so is using this private class
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* so changing the NetlinkListener() constructor breaks their ril.
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*/
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NetlinkListener::NetlinkListener(int socket) :
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SocketListener(socket, false) {
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mFormat = NETLINK_FORMAT_ASCII;
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}
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#endif
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NetlinkListener::NetlinkListener(int socket, int format) :
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SocketListener(socket, false), mFormat(format) {
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}
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bool NetlinkListener::onDataAvailable(SocketClient *cli)
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{
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int socket = cli->getSocket();
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ssize_t count;
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uid_t uid = -1;
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bool require_group = true;
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if (mFormat == NETLINK_FORMAT_BINARY_UNICAST) {
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require_group = false;
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}
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count = TEMP_FAILURE_RETRY(uevent_kernel_recv(socket,
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mBuffer, sizeof(mBuffer), require_group, &uid));
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if (count < 0) {
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SLOGE("recvmsg failed (%s)", strerror(errno));
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return false;
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}
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NetlinkEvent *evt = new NetlinkEvent();
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if (evt->decode(mBuffer, count, mFormat)) {
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onEvent(evt);
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} else if (mFormat != NETLINK_FORMAT_BINARY) {
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// Don't complain if parseBinaryNetlinkMessage returns false. That can
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// just mean that the buffer contained no messages we're interested in.
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SLOGE("Error decoding NetlinkEvent");
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}
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delete evt;
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return true;
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}
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