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/*
* This file is part of PowerDNS or dnsdist.
* Copyright -- PowerDNS.COM B.V. and its contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* In addition, for the avoidance of any doubt, permission is granted to
* link this program with OpenSSL and to (re)distribute the binaries
* produced as the result of such linking.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "svc-records.hh"
#include "misc.hh"
#include "base64.hh"
const std::map<std::string, SvcParam::SvcParamKey> SvcParam::SvcParams = {
{"mandatory", SvcParam::SvcParamKey::mandatory},
{"alpn", SvcParam::SvcParamKey::alpn},
{"no-default-alpn", SvcParam::SvcParamKey::no_default_alpn},
{"port", SvcParam::SvcParamKey::port},
{"ipv4hint", SvcParam::SvcParamKey::ipv4hint},
{"ech", SvcParam::SvcParamKey::ech},
{"ipv6hint", SvcParam::SvcParamKey::ipv6hint}
};
SvcParam::SvcParamKey SvcParam::keyFromString(const std::string& k) {
bool ignored;
return SvcParam::keyFromString(k, ignored);
}
SvcParam::SvcParamKey SvcParam::keyFromString(const std::string& k, bool &generic) {
auto it = SvcParams.find(k);
if (it != SvcParams.end()) {
generic = false;
return it->second;
}
if (k.substr(0, 3) == "key") {
try {
generic = true;
return SvcParam::SvcParamKey(pdns::checked_stoi<uint16_t>(k.substr(3)));
}
catch (...) {
}
}
throw std::invalid_argument("SvcParam '" + k + "' is not recognized or in keyNNNN format");
}
std::string SvcParam::keyToString(const SvcParam::SvcParamKey& k) {
auto ret = std::find_if(SvcParams.begin(), SvcParams.end(), [&](const std::pair<std::string, SvcParam::SvcParamKey>& e) { return e.second == k; });
if (ret != SvcParams.end()) {
return ret->first;
}
return "key" + std::to_string(k);
}
SvcParam::SvcParam(const SvcParamKey &key) {
d_key = key;
if (d_key != SvcParamKey::no_default_alpn) {
throw std::invalid_argument("can not create non-empty SvcParam for key '" + keyToString(key) + "'");
}
}
SvcParam::SvcParam(const SvcParamKey &key, const std::string &value) {
d_key = key;
if (d_key != SvcParamKey::ech && d_key < 7) {
throw std::invalid_argument("can not create SvcParam for " + keyToString(key) + " with a string value");
}
if (d_key == SvcParamKey::ech) {
std::string d;
// TODO check Base64 decode
d_ech = value;
return;
}
d_value = value;
}
SvcParam::SvcParam(const SvcParamKey &key, std::vector<std::string> &&value) {
d_key = key;
if (d_key != SvcParamKey::alpn) {
throw std::invalid_argument("can not create SvcParam for " + keyToString(key) + " with a string-set value");
}
if (d_key == SvcParamKey::alpn) {
d_alpn = std::move(value);
}
}
SvcParam::SvcParam(const SvcParamKey &key, std::set<std::string> &&value) {
d_key = key;
if (d_key != SvcParamKey::mandatory) {
throw std::invalid_argument("can not create SvcParam for " + keyToString(key) + " with a string-set value");
}
if (d_key == SvcParamKey::mandatory) {
for (auto const &v: value) {
d_mandatory.insert(keyFromString(v));
}
}
}
SvcParam::SvcParam(const SvcParamKey &key, std::set<SvcParam::SvcParamKey> &&value) {
d_key = key;
if (d_key != SvcParamKey::mandatory) {
throw std::invalid_argument("can not create SvcParam for " + keyToString(key) + " with a SvcParamKey-set value");
}
d_mandatory = std::move(value);
}
SvcParam::SvcParam(const SvcParamKey &key, std::vector<ComboAddress> &&value) {
d_key = key;
if (d_key != SvcParamKey::ipv6hint && d_key != SvcParamKey::ipv4hint) {
throw std::invalid_argument("can not create SvcParam for " + keyToString(key) + " with an IP address value");
}
for (auto const &addr : value) {
if (d_key == SvcParam::ipv6hint && !addr.isIPv6()) {
throw std::invalid_argument("non-IPv6 address ('" + addr.toString() + "') passed for " + keyToString(key));
}
if (d_key == SvcParam::ipv4hint && !addr.isIPv4()) {
throw std::invalid_argument("non-IPv4 address ('" + addr.toString() + "') passed for " + keyToString(key));
}
}
d_ipHints = std::move(value);
}
SvcParam::SvcParam(const SvcParamKey &key, const uint16_t value) {
d_key = key;
if (d_key != SvcParamKey::port) {
throw std::invalid_argument("can not create SvcParam for " + keyToString(key) + " with an port value");
}
d_port = value;
}
//! This ensures an std::set<SvcParam> will be sorted by key (section 2.2 mandates this for wire format)
bool SvcParam::operator<(const SvcParam& other) const {
return this->d_key < other.getKey();
}
const std::vector<ComboAddress>& SvcParam::getIPHints() const {
if (d_key != SvcParamKey::ipv6hint && d_key != SvcParamKey::ipv4hint) {
throw std::invalid_argument("getIPHints called for non-IP address key '" + keyToString(d_key) + "'");
}
return d_ipHints;
}
uint16_t SvcParam::getPort() const {
if (d_key != SvcParam::port) {
throw std::invalid_argument("getPort called for non-port key '" + keyToString(d_key) + "'");
}
return d_port;
}
const std::vector<std::string>& SvcParam::getALPN() const {
if (d_key != SvcParam::alpn) {
throw std::invalid_argument("getALPN called for non-alpn key '" + keyToString(d_key) + "'");
}
return d_alpn;
}
const std::set<SvcParam::SvcParamKey>& SvcParam::getMandatory() const {
if (d_key != SvcParam::mandatory) {
throw std::invalid_argument("getMandatory called for non-mandatory key '" + keyToString(d_key) + "'");
}
return d_mandatory;
}
const std::string& SvcParam::getECH() const {
if (d_key != SvcParam::ech) {
throw std::invalid_argument("getECH called for non-ech key '" + keyToString(d_key) + "'");
}
return d_ech;
}
const std::string& SvcParam::getValue() const {
if (d_key < 7) {
throw std::invalid_argument("getValue called for non-single value key '" + keyToString(d_key) + "'");
}
return d_value;
}
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