140 lines
3.6 KiB
C++
140 lines
3.6 KiB
C++
/*
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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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#include <stdio.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <pthread.h>
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#define LOG_TAG "DhcpClient"
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#include <cutils/log.h>
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#include <cutils/properties.h>
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#include <sysutils/ServiceManager.h>
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#include <netutils/ifc.h>
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#include <netutils/dhcp.h>
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#include "DhcpClient.h"
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#include "DhcpState.h"
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#include "DhcpListener.h"
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#include "IDhcpEventHandlers.h"
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#include "Controller.h"
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DhcpClient::DhcpClient(IDhcpEventHandlers *handlers) :
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mState(DhcpState::INIT), mHandlers(handlers) {
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mServiceManager = new ServiceManager();
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mListener = NULL;
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mListenerSocket = NULL;
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mController = NULL;
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mDoArpProbe = false;
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pthread_mutex_init(&mLock, NULL);
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}
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DhcpClient::~DhcpClient() {
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delete mServiceManager;
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if (mListener)
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delete mListener;
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}
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int DhcpClient::start(Controller *c) {
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ALOGD("Starting DHCP service (arp probe = %d)", mDoArpProbe);
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char svc[PROPERTY_VALUE_MAX];
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snprintf(svc,
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sizeof(svc),
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"dhcpcd:%s%s",
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(!mDoArpProbe ? "-A " : ""),
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c->getBoundInterface());
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pthread_mutex_lock(&mLock);
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if (mController) {
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pthread_mutex_unlock(&mLock);
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errno = EBUSY;
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return -1;
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}
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mController = c;
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sockaddr_in addr;
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if ((mListenerSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
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ALOGE("Failed to create DHCP listener socket");
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pthread_mutex_unlock(&mLock);
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return -1;
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}
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memset(&addr, 0, sizeof(addr));
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addr.sin_family = AF_INET;
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addr.sin_addr.s_addr = inet_addr("127.0.0.1");
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addr.sin_port = htons(DhcpClient::STATUS_MONITOR_PORT);
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if (bind(mListenerSocket, (struct sockaddr *) &addr, sizeof(addr))) {
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ALOGE("Failed to bind DHCP listener socket");
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close(mListenerSocket);
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mListenerSocket = -1;
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pthread_mutex_unlock(&mLock);
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return -1;
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}
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if (mServiceManager->start(svc)) {
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ALOGE("Failed to start dhcp service");
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pthread_mutex_unlock(&mLock);
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return -1;
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}
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mListener = new DhcpListener(mController, mListenerSocket, mHandlers);
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if (mListener->startListener()) {
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ALOGE("Failed to start listener");
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#if 0
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mServiceManager->stop("dhcpcd");
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return -1;
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#endif
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delete mListener;
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mListener = NULL;
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pthread_mutex_unlock(&mLock);
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}
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pthread_mutex_unlock(&mLock);
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return 0;
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}
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int DhcpClient::stop() {
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pthread_mutex_lock(&mLock);
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if (!mController) {
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pthread_mutex_unlock(&mLock);
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return 0;
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}
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if (mListener) {
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mListener->stopListener();
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delete mListener;
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mListener = NULL;
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}
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close(mListenerSocket);
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if (mServiceManager->stop("dhcpcd")) {
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ALOGW("Failed to stop DHCP service (%s)", strerror(errno));
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// XXX: Kill it the hard way.. but its gotta go!
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}
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mController = NULL;
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pthread_mutex_unlock(&mLock);
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return 0;
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}
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void DhcpClient::setDoArpProbe(bool probe) {
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mDoArpProbe = probe;
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}
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