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// Copyright (C) 2012-2019 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 <config.h>
#include <dhcp/duid.h>
#include <exceptions/exceptions.h>
#include <util/io_utilities.h>
#include <util/strutil.h>
#include <iomanip>
#include <cctype>
#include <sstream>
#include <vector>
#include <stdint.h>
namespace isc {
namespace dhcp {
DUID::DUID(const std::vector<uint8_t>& duid) {
if (duid.size() > MAX_DUID_LEN) {
isc_throw(isc::BadValue, "DUID size is " << duid.size()
<< " bytes, exceeds maximum of " << MAX_DUID_LEN);
}
if (duid.empty()) {
isc_throw(isc::BadValue, "Empty DUIDs are not allowed");
}
duid_ = duid;
}
DUID::DUID(const uint8_t* data, size_t len) {
if (len > MAX_DUID_LEN) {
isc_throw(isc::BadValue, "DUID size is " << len
<< " bytes, exceeds maximum of " << MAX_DUID_LEN);
}
if (len == 0) {
isc_throw(isc::BadValue, "Empty DUIDs/Client-ids not allowed");
}
duid_ = std::vector<uint8_t>(data, data + len);
}
const std::vector<uint8_t>& DUID::getDuid() const {
return (duid_);
}
DUID::DUIDType DUID::getType() const {
if (duid_.size() < 2) {
return (DUID_UNKNOWN);
}
uint16_t type = (duid_[0] << 8) + duid_[1];
if (type < DUID_MAX) {
return (static_cast<DUID::DUIDType>(type));
} else {
return (DUID_UNKNOWN);
}
}
DUID
DUID::fromText(const std::string& text) {
std::vector<uint8_t> binary;
util::str::decodeFormattedHexString(text, binary);
return (DUID(binary));
}
const DUID&
DUID::EMPTY() {
static std::vector<uint8_t> empty_duid(1,0);
static DUID empty(empty_duid);
return (empty);
}
std::string DUID::toText() const {
std::stringstream tmp;
tmp << std::hex;
bool delim = false;
for (std::vector<uint8_t>::const_iterator it = duid_.begin();
it != duid_.end(); ++it) {
if (delim) {
tmp << ":";
}
tmp << std::setw(2) << std::setfill('0') << static_cast<unsigned int>(*it);
delim = true;
}
return (tmp.str());
}
bool DUID::operator==(const DUID& other) const {
return (this->duid_ == other.duid_);
}
bool DUID::operator!=(const DUID& other) const {
return (this->duid_ != other.duid_);
}
// Constructor based on vector<uint8_t>
ClientId::ClientId(const std::vector<uint8_t>& clientid)
: DUID(clientid) {
if (clientid.size() < MIN_CLIENT_ID_LEN) {
isc_throw(isc::BadValue, "client-id is too short (" << clientid.size()
<< "), at least 2 is required");
}
}
// Constructor based on C-style data
ClientId::ClientId(const uint8_t *clientid, size_t len)
: DUID(clientid, len) {
if (len < MIN_CLIENT_ID_LEN) {
isc_throw(isc::BadValue, "client-id is too short (" << len
<< "), at least 2 is required");
}
}
// Returns a copy of client-id data
const std::vector<uint8_t>& ClientId::getClientId() const {
return (duid_);
}
// Returns the Client ID in text form
std::string ClientId::toText() const {
// As DUID is a private base class of ClientId, we can't access
// its public toText() method through inheritance: instead we
// need the interface of a ClientId::toText() that calls the
// equivalent method in the base class.
return (DUID::toText());
}
ClientIdPtr
ClientId::fromText(const std::string& text) {
std::vector<uint8_t> binary;
util::str::decodeFormattedHexString(text, binary);
return (ClientIdPtr(new ClientId(binary)));
}
// Compares two client-ids
bool ClientId::operator==(const ClientId& other) const {
return (this->duid_ == other.duid_);
}
// Compares two client-ids
bool ClientId::operator!=(const ClientId& other) const {
return (this->duid_ != other.duid_);
}
}; // end of isc::dhcp namespace
}; // end of isc namespace
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