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// Copyright (C) 2011-2016 Internet Systems Consortium, Inc. ("ISC")
//
// 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 <asiolink/io_address.h>
#include <dhcp/option4_addrlst.h>
#include <exceptions/exceptions.h>
#include <util/io_utilities.h>
#include <iomanip>
#include <sstream>
#include <arpa/inet.h>
#include <stdint.h>
#include <string.h>
using namespace std;
using namespace isc::util;
using namespace isc::asiolink;
namespace isc {
namespace dhcp {
Option4AddrLst::Option4AddrLst(uint8_t type)
:Option(V4, type) {
}
Option4AddrLst::Option4AddrLst(uint8_t type, const AddressContainer& addrs)
:Option(V4, type) {
setAddresses(addrs);
// don't set addrs_ directly. setAddresses() will do additional checks.
}
Option4AddrLst::Option4AddrLst(uint8_t type, OptionBufferConstIter first,
OptionBufferConstIter last)
:Option(V4, type) {
if ( (distance(first, last) % V4ADDRESS_LEN) ) {
isc_throw(OutOfRange, "DHCPv4 Option4AddrLst " << type_
<< " has invalid length=" << distance(first, last)
<< ", must be divisible by 4.");
}
while (first != last) {
const uint8_t* ptr = &(*first);
addAddress(IOAddress(readUint32(ptr, distance(first, last))));
first += V4ADDRESS_LEN;
}
}
Option4AddrLst::Option4AddrLst(uint8_t type, const IOAddress& addr)
:Option(V4, type) {
setAddress(addr);
}
OptionPtr
Option4AddrLst::clone() const {
return (cloneInternal<Option4AddrLst>());
}
void
Option4AddrLst::pack(isc::util::OutputBuffer& buf) const {
if (addrs_.size() * V4ADDRESS_LEN > 255) {
isc_throw(OutOfRange, "DHCPv4 Option4AddrLst " << type_ << " is too big."
<< "At most 255 bytes are supported.");
/// TODO Larger options can be stored as separate instances
/// of DHCPv4 options. Clients MUST concatenate them.
/// Fortunately, there are no such large options used today.
}
buf.writeUint8(type_);
buf.writeUint8(len() - getHeaderLen());
AddressContainer::const_iterator addr = addrs_.begin();
while (addr != addrs_.end()) {
buf.writeUint32(addr->toUint32());
++addr;
}
}
void Option4AddrLst::setAddress(const isc::asiolink::IOAddress& addr) {
if (!addr.isV4()) {
isc_throw(BadValue, "Can't store non-IPv4 address in "
<< "Option4AddrLst option");
}
addrs_.clear();
addAddress(addr);
}
void Option4AddrLst::setAddresses(const AddressContainer& addrs) {
// Do not copy it as a whole. addAddress() does sanity checks.
// i.e. throw if someone tries to set IPv6 address.
addrs_.clear();
for (AddressContainer::const_iterator addr = addrs.begin();
addr != addrs.end(); ++addr) {
addAddress(*addr);
}
}
void Option4AddrLst::addAddress(const isc::asiolink::IOAddress& addr) {
if (!addr.isV4()) {
isc_throw(BadValue, "Can't store non-IPv4 address in "
<< "Option4AddrLst option");
}
addrs_.push_back(addr);
}
uint16_t Option4AddrLst::len() const {
// Returns length of the complete option (option header + data length)
return (getHeaderLen() + addrs_.size() * V4ADDRESS_LEN);
}
std::string Option4AddrLst::toText(int indent) const {
std::stringstream output;
output << headerToText(indent) << ":";
for (AddressContainer::const_iterator addr = addrs_.begin();
addr != addrs_.end(); ++addr) {
output << " " << (*addr);
}
return (output.str());
}
} // end of isc::dhcp namespace
} // end of isc namespace
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