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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <pthread.h>
#define LOG_TAG "DhcpClient"
#include <cutils/log.h>
#include <cutils/properties.h>
#include <sysutils/ServiceManager.h>
#include <netutils/ifc.h>
#include <netutils/dhcp.h>
#include "DhcpClient.h"
#include "DhcpState.h"
#include "DhcpListener.h"
#include "IDhcpEventHandlers.h"
#include "Controller.h"
DhcpClient::DhcpClient(IDhcpEventHandlers *handlers) :
mState(DhcpState::INIT), mHandlers(handlers) {
mServiceManager = new ServiceManager();
mListener = NULL;
mListenerSocket = NULL;
mController = NULL;
mDoArpProbe = false;
pthread_mutex_init(&mLock, NULL);
}
DhcpClient::~DhcpClient() {
delete mServiceManager;
if (mListener)
delete mListener;
}
int DhcpClient::start(Controller *c) {
LOGD("Starting DHCP service (arp probe = %d)", mDoArpProbe);
char svc[PROPERTY_VALUE_MAX];
snprintf(svc,
sizeof(svc),
"dhcpcd:%s%s",
(!mDoArpProbe ? "-A " : ""),
c->getBoundInterface());
pthread_mutex_lock(&mLock);
if (mController) {
pthread_mutex_unlock(&mLock);
errno = EBUSY;
return -1;
}
mController = c;
sockaddr_in addr;
if ((mListenerSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
LOGE("Failed to create DHCP listener socket");
pthread_mutex_unlock(&mLock);
return -1;
}
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = inet_addr("127.0.0.1");
addr.sin_port = htons(DhcpClient::STATUS_MONITOR_PORT);
if (bind(mListenerSocket, (struct sockaddr *) &addr, sizeof(addr))) {
LOGE("Failed to bind DHCP listener socket");
close(mListenerSocket);
mListenerSocket = -1;
pthread_mutex_unlock(&mLock);
return -1;
}
if (mServiceManager->start(svc)) {
LOGE("Failed to start dhcp service");
pthread_mutex_unlock(&mLock);
return -1;
}
mListener = new DhcpListener(mController, mListenerSocket, mHandlers);
if (mListener->startListener()) {
LOGE("Failed to start listener");
#if 0
mServiceManager->stop("dhcpcd");
return -1;
#endif
delete mListener;
mListener = NULL;
pthread_mutex_unlock(&mLock);
}
pthread_mutex_unlock(&mLock);
return 0;
}
int DhcpClient::stop() {
pthread_mutex_lock(&mLock);
if (!mController) {
pthread_mutex_unlock(&mLock);
return 0;
}
if (mListener) {
mListener->stopListener();
delete mListener;
mListener = NULL;
}
close(mListenerSocket);
if (mServiceManager->stop("dhcpcd")) {
LOGW("Failed to stop DHCP service (%s)", strerror(errno));
// XXX: Kill it the hard way.. but its gotta go!
}
mController = NULL;
pthread_mutex_unlock(&mLock);
return 0;
}
void DhcpClient::setDoArpProbe(bool probe) {
mDoArpProbe = probe;
}
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