tdlight/td/telegram/net/DcOptions.h
2021-09-12 22:39:52 +03:00

253 lines
7.0 KiB
C++

//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2021
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#pragma once
#include "td/mtproto/ProxySecret.h"
#include "td/telegram/net/DcId.h"
#include "td/telegram/telegram_api.h"
#include "td/utils/common.h"
#include "td/utils/format.h"
#include "td/utils/logging.h"
#include "td/utils/port/IPAddress.h"
#include "td/utils/Slice.h"
#include "td/utils/StringBuilder.h"
#include "td/utils/tl_helpers.h"
namespace td {
class DcOption {
// do not forget to update PrintFlags
enum Flags : int32 { IPv6 = 1, MediaOnly = 2, ObfuscatedTcpOnly = 4, Cdn = 8, Static = 16, HasSecret = 32 };
int32 flags_ = 0;
DcId dc_id_;
IPAddress ip_address_;
mtproto::ProxySecret secret_;
struct PrintFlags {
int32 flags;
};
public:
DcOption() = default;
DcOption(DcId dc_id, const IPAddress &ip_address)
: flags_(ip_address.is_ipv4() ? 0 : IPv6), dc_id_(dc_id), ip_address_(ip_address) {
}
explicit DcOption(const telegram_api::dcOption &option) {
auto ip = option.ip_address_;
auto port = option.port_;
flags_ = 0;
if (!DcId::is_valid(option.id_)) {
dc_id_ = DcId::invalid();
return;
}
if (option.cdn_) {
dc_id_ = DcId::external(option.id_);
flags_ |= Flags::Cdn;
} else {
dc_id_ = DcId::internal(option.id_);
}
if (option.ipv6_) {
flags_ |= Flags::IPv6;
}
if (option.media_only_) {
flags_ |= Flags::MediaOnly;
}
if (option.tcpo_only_) {
flags_ |= Flags::ObfuscatedTcpOnly;
}
if (option.static_) {
flags_ |= Flags::Static;
}
if (!option.secret_.empty()) {
flags_ |= Flags::HasSecret;
auto r_secret = mtproto::ProxySecret::from_binary(option.secret_.as_slice());
if (r_secret.is_error()) {
return;
}
secret_ = r_secret.move_as_ok();
}
init_ip_address(ip, port);
}
DcOption(DcId new_dc_id, const telegram_api::IpPort &ip_port_ref) {
switch (ip_port_ref.get_id()) {
case telegram_api::ipPort::ID: {
auto &ip_port = static_cast<const telegram_api::ipPort &>(ip_port_ref);
init_ip_address(IPAddress::ipv4_to_str(static_cast<uint32>(ip_port.ipv4_)), ip_port.port_);
break;
}
case telegram_api::ipPortSecret::ID: {
auto &ip_port = static_cast<const telegram_api::ipPortSecret &>(ip_port_ref);
auto r_secret = mtproto::ProxySecret::from_binary(ip_port.secret_.as_slice());
if (r_secret.is_error()) {
return;
}
flags_ |= Flags::HasSecret;
secret_ = r_secret.move_as_ok();
init_ip_address(IPAddress::ipv4_to_str(static_cast<uint32>(ip_port.ipv4_)), ip_port.port_);
break;
}
default:
UNREACHABLE();
}
flags_ |= Flags::ObfuscatedTcpOnly;
dc_id_ = new_dc_id;
}
DcId get_dc_id() const {
return dc_id_;
}
const IPAddress &get_ip_address() const {
return ip_address_;
}
bool is_ipv6() const {
return (flags_ & Flags::IPv6) != 0;
}
bool is_media_only() const {
return (flags_ & Flags::MediaOnly) != 0;
}
bool is_obfuscated_tcp_only() const {
return (flags_ & Flags::ObfuscatedTcpOnly) != 0;
}
bool is_static() const {
return (flags_ & Flags::Static) != 0;
}
bool is_valid() const {
return ip_address_.is_valid() && dc_id_.is_exact();
}
const mtproto::ProxySecret &get_secret() const {
return secret_;
}
template <class StorerT>
void store(StorerT &storer) const {
storer.store_int(flags_);
storer.store_int(dc_id_.get_raw_id());
CHECK(ip_address_.is_valid());
storer.store_string(ip_address_.get_ip_str());
storer.store_int(ip_address_.get_port());
if ((flags_ & Flags::HasSecret) != 0) {
td::store(secret_.get_raw_secret(), storer);
}
}
template <class ParserT>
void parse(ParserT &parser) {
flags_ = parser.fetch_int();
auto raw_dc_id = parser.fetch_int();
if (!DcId::is_valid(raw_dc_id)) {
LOG(ERROR) << "Have invalid DC ID " << raw_dc_id;
dc_id_ = DcId::invalid();
} else {
if ((flags_ & Flags::Cdn) != 0) {
dc_id_ = DcId::external(raw_dc_id);
} else {
dc_id_ = DcId::internal(raw_dc_id);
}
}
auto ip = parser.template fetch_string<std::string>();
auto port = parser.fetch_int();
init_ip_address(ip, port);
if ((flags_ & Flags::HasSecret) != 0) {
secret_ = mtproto::ProxySecret::from_raw(parser.template fetch_string<Slice>());
}
}
friend bool operator==(const DcOption &lhs, const DcOption &rhs);
friend StringBuilder &operator<<(StringBuilder &sb, const PrintFlags &flags);
friend StringBuilder &operator<<(StringBuilder &sb, const DcOption &dc_option);
private:
void init_ip_address(CSlice ip, int32 port) {
if (is_ipv6()) {
ip_address_.init_ipv6_port(ip, port).ignore();
} else {
ip_address_.init_ipv4_port(ip, port).ignore();
}
}
};
inline bool operator==(const DcOption &lhs, const DcOption &rhs) {
return lhs.dc_id_ == rhs.dc_id_ && lhs.ip_address_ == rhs.ip_address_ && lhs.flags_ == rhs.flags_ &&
lhs.secret_ == rhs.secret_;
}
inline StringBuilder &operator<<(StringBuilder &sb, const DcOption::PrintFlags &flags) {
if ((flags.flags & DcOption::Flags::ObfuscatedTcpOnly) != 0) {
sb << "(ObfuscatedTcpOnly)";
}
if ((flags.flags & DcOption::Flags::MediaOnly) != 0) {
sb << "(MediaOnly)";
}
if ((flags.flags & DcOption::Flags::IPv6) != 0) {
sb << "(IPv6)";
}
if ((flags.flags & DcOption::Flags::Cdn) != 0) {
sb << "(Cdn)";
}
if ((flags.flags & DcOption::Flags::Static) != 0) {
sb << "(Static)";
}
if ((flags.flags & DcOption::Flags::HasSecret) != 0) {
sb << "(HasSecret)";
}
return sb;
}
inline StringBuilder &operator<<(StringBuilder &sb, const DcOption &dc_option) {
return sb << tag("DcOption", format::concat(dc_option.dc_id_, tag("ip", dc_option.ip_address_.get_ip_str()),
tag("port", dc_option.ip_address_.get_port()),
tag("secret_len", dc_option.get_secret().get_raw_secret().size()),
tag("flags", DcOption::PrintFlags{dc_option.flags_})));
}
class DcOptions {
public:
DcOptions() = default;
explicit DcOptions(const std::vector<tl_object_ptr<telegram_api::dcOption>> &server_dc_options) {
for (auto &dc_option : server_dc_options) {
DcOption option(*dc_option);
if (option.is_valid()) {
dc_options.push_back(std::move(option));
}
}
}
template <class StorerT>
void store(StorerT &storer) const {
::td::store(dc_options, storer);
}
template <class ParserT>
void parse(ParserT &parser) {
::td::parse(dc_options, parser);
}
std::vector<DcOption> dc_options;
};
inline StringBuilder &operator<<(StringBuilder &sb, const DcOptions &dc_options) {
return sb << "DcOptions" << format::as_array(dc_options.dc_options);
}
} // namespace td