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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsWindowsDHCPClient.h"
#include <vector>
#include "DHCPUtils.h"
#include "nsNetCID.h"
#include "nsString.h"
#include "mozilla/Logging.h"
#include "mozilla/Components.h"
namespace mozilla {
namespace toolkit {
namespace system {
namespace windowsDHCPClient {
LazyLogModule gDhcpLog("windowsDHCPClient");
#undef LOG
#define LOG(args) MOZ_LOG(gDhcpLog, LogLevel::Debug, args)
#define MOZ_MAX_DHCP_OPTION_LENGTH \
255 // this is the maximum option length in DHCP V4 and 6
NS_IMPL_ISUPPORTS(nsWindowsDHCPClient, nsIDHCPClient)
NS_IMETHODIMP
nsWindowsDHCPClient::GetOption(uint8_t aOption, nsACString& aRetVal) {
nsCString networkAdapterName;
nsresult rv;
rv = GetActiveDHCPNetworkAdapterName(networkAdapterName, mNetworkFunctions);
if (rv != NS_OK) {
LOG(
("Failed to get network adapter name in nsWindowsDHCPClient::GetOption "
"due to error %d",
uint32_t(rv)));
return rv;
}
uint32_t sizeOptionValue = MOZ_MAX_DHCP_OPTION_LENGTH;
std::vector<char> optionValue;
bool retryingAfterLossOfSignificantData = false;
do {
optionValue.resize(sizeOptionValue);
rv = RetrieveOption(networkAdapterName, aOption, optionValue,
&sizeOptionValue, mNetworkFunctions);
if (rv == NS_ERROR_LOSS_OF_SIGNIFICANT_DATA) {
LOG((
"In nsWindowsDHCPClient::GetOption, DHCP Option %d required %d bytes",
aOption, sizeOptionValue));
if (retryingAfterLossOfSignificantData) {
break;
}
retryingAfterLossOfSignificantData = true;
}
} while (rv == NS_ERROR_LOSS_OF_SIGNIFICANT_DATA);
if (rv != NS_OK) {
LOG(
("Failed to get DHCP Option %d nsWindowsDHCPClient::GetOption due to "
"error %d",
aOption, uint32_t(rv)));
return rv;
}
aRetVal.Assign(optionValue.data(), sizeOptionValue);
return NS_OK;
}
} // namespace windowsDHCPClient
} // namespace system
} // namespace toolkit
} // namespace mozilla
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