mirror of
https://github.com/savoirfairelinux/opendht.git
synced 2026-11-08 12:28:42 +00:00
465 lines
14 KiB
C++
465 lines
14 KiB
C++
/*
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* Copyright (C) 2014-2016 Savoir-faire Linux Inc.
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* Author(s) : Adrien Béraud <adrien.beraud@savoirfairelinux.com>
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* Simon Désaulniers <sim.desaulniers@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "value.h"
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#include "default_types.h"
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#include "securedht.h" // print certificate ID
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namespace dht {
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const std::string Query::QUERY_PARSE_ERROR {"Error parsing query."};
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std::ostream& operator<< (std::ostream& s, const Value& v)
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{
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s << "Value[id:" << std::hex << v.id << std::dec << " ";
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if (v.isEncrypted())
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s << "encrypted ";
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else if (v.isSigned()) {
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s << "signed (v" << v.seq << ") ";
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if (v.recipient != InfoHash())
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s << "decrypted ";
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}
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if (not v.isEncrypted()) {
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if (v.type == IpServiceAnnouncement::TYPE.id) {
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s << IpServiceAnnouncement(v.data);
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} else if (v.type == CERTIFICATE_TYPE.id) {
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s << "Certificate";
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try {
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InfoHash h = crypto::Certificate(v.data).getPublicKey().getId();
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s << " with ID " << h;
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} catch (const std::exception& e) {
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s << " (invalid)";
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}
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} else {
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s << "Data (type: " << v.type << " ): ";
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s << std::hex;
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for (size_t i=0; i<v.data.size(); i++)
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s << std::setfill('0') << std::setw(2) << (unsigned)v.data[i] << " ";
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s << std::dec;
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}
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}
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s << "]";
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return s;
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}
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const ValueType ValueType::USER_DATA = {0, "User Data"};
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bool
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ValueType::DEFAULT_STORE_POLICY(InfoHash, std::shared_ptr<Value>& v, InfoHash, const sockaddr*, socklen_t)
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{
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return v->data.size() <= MAX_VALUE_SIZE;
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}
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msgpack::object*
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findMapValue(const msgpack::object& map, const std::string& key) {
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if (map.type != msgpack::type::MAP) throw msgpack::type_error();
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for (unsigned i = 0; i < map.via.map.size; i++) {
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auto& o = map.via.map.ptr[i];
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if(o.key.type != msgpack::type::STR)
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continue;
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if (o.key.as<std::string>() == key) {
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return &o.val;
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}
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}
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return nullptr;
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}
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size_t
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Value::size() const
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{
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return cypher.size() + data.size() + signature.size() + user_type.size();
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}
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void
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Value::msgpack_unpack(msgpack::object o)
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{
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if (o.type != msgpack::type::MAP) throw msgpack::type_error();
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if (o.via.map.size < 2) throw msgpack::type_error();
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if (auto rid = findMapValue(o, "id")) {
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id = rid->as<Id>();
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} else
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throw msgpack::type_error();
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if (auto rdat = findMapValue(o, "dat")) {
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msgpack_unpack_body(*rdat);
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} else
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throw msgpack::type_error();
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}
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void
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Value::msgpack_unpack_body(const msgpack::object& o)
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{
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owner = {};
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recipient = {};
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cypher.clear();
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signature.clear();
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data.clear();
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type = 0;
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if (o.type == msgpack::type::BIN) {
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auto dat = o.as<std::vector<char>>();
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cypher = {dat.begin(), dat.end()};
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} else {
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if (o.type != msgpack::type::MAP)
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throw msgpack::type_error();
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auto rbody = findMapValue(o, "body");
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if (not rbody)
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throw msgpack::type_error();
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if (auto rdata = findMapValue(*rbody, "data")) {
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data = unpackBlob(*rdata);
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} else
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throw msgpack::type_error();
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if (auto rtype = findMapValue(*rbody, "type")) {
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type = rtype->as<ValueType::Id>();
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} else
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throw msgpack::type_error();
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if (auto rutype = findMapValue(*rbody, "utype")) {
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user_type = rutype->as<std::string>();
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}
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if (auto rowner = findMapValue(*rbody, "owner")) {
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if (auto rseq = findMapValue(*rbody, "seq"))
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seq = rseq->as<decltype(seq)>();
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else
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throw msgpack::type_error();
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crypto::PublicKey new_owner;
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new_owner.msgpack_unpack(*rowner);
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owner = std::make_shared<const crypto::PublicKey>(std::move(new_owner));
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if (auto rrecipient = findMapValue(*rbody, "to")) {
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recipient = rrecipient->as<InfoHash>();
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}
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if (auto rsig = findMapValue(o, "sig")) {
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signature = unpackBlob(*rsig);
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} else
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throw msgpack::type_error();
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}
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}
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}
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bool
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FieldValue::operator==(const FieldValue& vfd) const
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{
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if (field != vfd.field)
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return false;
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switch (field) {
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case Value::Field::Id:
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case Value::Field::ValueType:
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return intValue == vfd.intValue;
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case Value::Field::OwnerPk:
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return hashValue == vfd.hashValue;
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case Value::Field::UserType:
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return blobValue == vfd.blobValue;
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case Value::Field::None:
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return true;
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default:
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return false;
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}
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}
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Value::Filter
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FieldValue::getLocalFilter() const
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{
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switch (field) {
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case Value::Field::Id:
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return Value::IdFilter(intValue);
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case Value::Field::ValueType:
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return Value::TypeFilter(intValue);
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case Value::Field::OwnerPk:
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return Value::ownerFilter(hashValue);
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case Value::Field::UserType:
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return Value::userTypeFilter(std::string {blobValue.begin(), blobValue.end()});
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default:
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return Value::AllFilter();
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}
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}
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FieldValueIndex::FieldValueIndex(const Value& v, Select s)
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{
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auto selection = s.getSelection();
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if (not selection.empty()) {
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std::transform(selection.begin(), selection.end(), std::inserter(index, index.end()),
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[](const std::set<Value::Field>::value_type& f) {
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return std::make_pair(f, FieldValue {});
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});
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} else {
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index.clear();
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for (size_t f = 1 ; f < 5 ; ++f)
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index[static_cast<Value::Field>(f)] = {};
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}
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for (const auto& fvp : index) {
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const auto& f = fvp.first;
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switch (f) {
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case Value::Field::Id:
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index[f] = {f, v.id};
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break;
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case Value::Field::ValueType:
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index[f] = {f, v.type};
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break;
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case Value::Field::OwnerPk:
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index[f] = {f, v.owner ? v.owner->getId() : InfoHash() };
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break;
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case Value::Field::UserType:
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index[f] = {f, Blob {v.user_type.begin(), v.user_type.end()}};
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break;
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default:
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break;
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}
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}
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}
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bool FieldValueIndex::containedIn(const FieldValueIndex& other) const {
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if (index.size() > other.index.size())
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return false;
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for (const auto& field : index) {
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auto other_field = other.index.find(field.first);
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if (other_field == other.index.end())
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return false;
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}
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return true;
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}
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std::ostream& operator<<(std::ostream& os, const FieldValueIndex& fvi) {
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os << "Index[";
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for (auto v = fvi.index.begin(); v != fvi.index.end(); ++v) {
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switch (v->first) {
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case Value::Field::Id:
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os << "Id:" << std::hex << v->second.getInt();
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break;
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case Value::Field::ValueType:
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os << "ValueType:" << v->second.getInt();
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break;
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case Value::Field::OwnerPk:
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os << "Owner:" << v->second.getHash().toString();
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break;
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case Value::Field::UserType: {
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auto ut = v->second.getBlob();
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os << "UserType:" << std::string(ut.begin(), ut.end());
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break;
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}
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default:
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break;
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}
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os << (std::next(v) != fvi.index.end() ? "," : "");
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}
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return os << "]";
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}
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void
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FieldValueIndex::msgpack_unpack_fields(const std::set<Value::Field>& fields, const msgpack::object& o, unsigned offset)
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{
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index.clear();
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unsigned j = 0;
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for (const auto& field : fields) {
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auto& field_value = o.via.array.ptr[offset+(j++)];
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switch (field) {
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case Value::Field::Id:
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case Value::Field::ValueType:
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index[field] = FieldValue(field, field_value.as<uint64_t>());
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break;
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case Value::Field::OwnerPk:
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index[field] = FieldValue(field, field_value.as<InfoHash>());
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break;
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case Value::Field::UserType:
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index[field] = FieldValue(field, field_value.as<Blob>());
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break;
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default:
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throw msgpack::type_error();
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}
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}
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}
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void trim_str(std::string& str) {
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auto first = std::min(str.size(), str.find_first_not_of(" "));
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auto last = std::min(str.size(), str.find_last_not_of(" "));
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str = str.substr(first, last - first + 1);
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}
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Select::Select(const std::string& q_str) {
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std::istringstream q_iss {q_str};
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std::string token {};
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q_iss >> token;
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if (token == "SELECT" or token == "select") {
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q_iss >> token;
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std::istringstream fields {token};
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while (std::getline(fields, token, ',')) {
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trim_str(token);
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if (token == "id")
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field(Value::Field::Id);
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else if (token == "value_type")
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field(Value::Field::ValueType);
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else if (token == "owner_pk")
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field(Value::Field::OwnerPk);
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else if (token == "user_type")
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field(Value::Field::UserType);
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}
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}
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}
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Where::Where(const std::string& q_str) {
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std::istringstream q_iss {q_str};
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std::string token {};
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q_iss >> token;
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if (token == "WHERE" or token == "where") {
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std::getline(q_iss, token);
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std::istringstream restrictions {token};
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while (std::getline(restrictions, token, ',')) {
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trim_str(token);
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std::istringstream eq_ss {token};
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std::string field_str, value_str;
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std::getline(eq_ss, field_str, '=');
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trim_str(field_str);
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std::getline(eq_ss, value_str, '=');
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trim_str(value_str);
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if (not value_str.empty()) {
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uint64_t v = 0;
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std::string s {};
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std::istringstream convert {value_str};
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convert >> v;
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if (convert.failbit and value_str.size() > 1 and value_str[0] == '\"' and value_str[value_str.size()-1] == '\"')
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s = value_str.substr(1, value_str.size()-2);
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else
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s = value_str;
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if (field_str == "id")
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id(v);
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else if (field_str == "value_type")
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valueType(v);
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else if (field_str == "owner_pk")
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owner(InfoHash(s));
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else if (field_str == "user_type")
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userType(s);
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else
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throw std::invalid_argument(Query::QUERY_PARSE_ERROR + " (WHERE) wrong token near: " + field_str);
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}
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}
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}
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}
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void
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Query::msgpack_unpack(const msgpack::object& o)
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{
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if (o.type != msgpack::type::MAP)
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throw msgpack::type_error();
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auto rfilters = findMapValue(o, "w"); /* unpacking filters */
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if (rfilters)
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where.msgpack_unpack(*rfilters);
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else
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throw msgpack::type_error();
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auto rfield_selector = findMapValue(o, "s"); /* unpacking field selectors */
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if (rfield_selector)
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select.msgpack_unpack(*rfield_selector);
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else
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throw msgpack::type_error();
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}
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template <typename T>
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bool subset(std::vector<T> fds, std::vector<T> qfds)
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{
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for (auto& fd : fds) {
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auto correspondance = std::find_if(qfds.begin(), qfds.end(), [&fd](T& _vfd) { return fd == _vfd; });
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if (correspondance == qfds.end())
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return false;
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}
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return true;
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}
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bool Select::isSatisfiedBy(const Select& os) const {
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/* empty, means all values are selected. */
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if (fieldSelection_.empty() and not os.fieldSelection_.empty())
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return false;
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else
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return subset(fieldSelection_, os.fieldSelection_);
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}
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bool Where::isSatisfiedBy(const Where& ow) const {
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return subset(ow.filters_, filters_);
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}
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bool Query::isSatisfiedBy(const Query& q) const {
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return where.isSatisfiedBy(q.where) and select.isSatisfiedBy(q.select);
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}
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std::ostream& operator<<(std::ostream& s, const dht::Select& select) {
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s << "SELECT " << (select.fieldSelection_.empty() ? "*" : "");
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for (auto fs = select.fieldSelection_.begin() ; fs != select.fieldSelection_.end() ; ++fs) {
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switch (fs->getField()) {
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case Value::Field::Id:
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s << "id";
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break;
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case Value::Field::ValueType:
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s << "value_type";
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break;
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case Value::Field::UserType:
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s << "user_type";
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break;
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case Value::Field::OwnerPk:
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s << "owner_public_key";
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break;
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default:
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break;
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}
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s << (std::next(fs) != select.fieldSelection_.end() ? "," : "");
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}
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return s;
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}
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std::ostream& operator<<(std::ostream& s, const dht::Where& where) {
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if (not where.filters_.empty()) {
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s << "WHERE ";
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for (auto f = where.filters_.begin() ; f != where.filters_.end() ; ++f) {
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switch (f->getField()) {
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case Value::Field::Id:
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s << "id=" << f->getInt();
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break;
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case Value::Field::ValueType:
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s << "value_type=" << f->getInt();
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break;
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case Value::Field::OwnerPk:
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s << "owner_pk_hash=" << f->getHash().toString();
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break;
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case Value::Field::UserType: {
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auto b = f->getBlob();
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s << "user_type=" << std::string {b.begin(), b.end()};
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break;
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}
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default:
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break;
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}
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s << (std::next(f) != where.filters_.end() ? "," : "");
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}
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}
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return s;
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}
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}
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