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// Copyright (c) 2018-2023, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "parse.h"
#include "net/tor_address.h"
#include "net/i2p_address.h"
#include "string_tools.h"
#include "string_tools_lexical.h"
namespace net
{
void get_network_address_host_and_port(const std::string& address, std::string& host, std::string& port)
{
// If IPv6 address format with port "[addr:addr:addr:...:addr]:port"
if (address.find(']') != std::string::npos)
{
host = address.substr(1, address.rfind(']') - 1);
if ((host.size() + 2) < address.size())
{
port = address.substr(address.rfind(':') + 1);
}
}
// Else if IPv6 address format without port e.g. "addr:addr:addr:...:addr"
else if (std::count(address.begin(), address.end(), ':') >= 2)
{
host = address;
}
// Else IPv4, Tor, I2P address or hostname
else
{
host = address.substr(0, address.rfind(':'));
if (host.size() < address.size())
{
port = address.substr(host.size() + 1);
}
}
}
expect<epee::net_utils::network_address>
get_network_address(const boost::string_ref address, const std::uint16_t default_port)
{
std::string host_str = "";
std::string port_str = "";
bool ipv6 = false;
get_network_address_host_and_port(std::string(address), host_str, port_str);
boost::string_ref host_str_ref(host_str);
boost::string_ref port_str_ref(port_str);
if (host_str.empty())
return make_error_code(net::error::invalid_host);
if (host_str_ref.ends_with(".onion"))
return tor_address::make(address, default_port);
if (host_str_ref.ends_with(".i2p"))
return i2p_address::make(address);
boost::system::error_code ec;
boost::asio::ip::address_v6 v6 = boost::asio::ip::address_v6::from_string(host_str, ec);
ipv6 = !ec;
std::uint16_t port = default_port;
if (port_str.size())
{
if (!epee::string_tools::get_xtype_from_string(port, port_str))
return make_error_code(net::error::invalid_port);
}
if (ipv6)
{
return {epee::net_utils::ipv6_network_address{v6, port}};
}
else
{
std::uint32_t ip = 0;
if (epee::string_tools::get_ip_int32_from_string(ip, host_str))
return {epee::net_utils::ipv4_network_address{ip, port}};
}
return make_error_code(net::error::unsupported_address);
}
expect<epee::net_utils::ipv4_network_subnet>
get_ipv4_subnet_address(const boost::string_ref address, bool allow_implicit_32)
{
uint32_t mask = 32;
const boost::string_ref::size_type slash = address.find_first_of('/');
if (slash != boost::string_ref::npos)
{
if (!epee::string_tools::get_xtype_from_string(mask, std::string{address.substr(slash + 1)}))
return make_error_code(net::error::invalid_mask);
if (mask > 32)
return make_error_code(net::error::invalid_mask);
}
else if (!allow_implicit_32)
return make_error_code(net::error::invalid_mask);
std::uint32_t ip = 0;
boost::string_ref S(address.data(), slash != boost::string_ref::npos ? slash : address.size());
if (!epee::string_tools::get_ip_int32_from_string(ip, std::string(S)))
return make_error_code(net::error::invalid_host);
return {epee::net_utils::ipv4_network_subnet{ip, (uint8_t)mask}};
}
expect<boost::asio::ip::tcp::endpoint> get_tcp_endpoint(const boost::string_ref address)
{
uint16_t port = 0;
expect<epee::net_utils::network_address> parsed = get_network_address(address, port);
if (!parsed)
{
return parsed.error();
}
boost::asio::ip::tcp::endpoint result;
switch (parsed->get_type_id())
{
case epee::net_utils::ipv4_network_address::get_type_id():
{
const auto &ipv4 = parsed->as<epee::net_utils::ipv4_network_address>();
result = boost::asio::ip::tcp::endpoint(boost::asio::ip::address_v4(SWAP32BE(ipv4.ip())), ipv4.port());
break;
}
case epee::net_utils::ipv6_network_address::get_type_id():
{
const auto &ipv6 = parsed->as<epee::net_utils::ipv6_network_address>();
result = boost::asio::ip::tcp::endpoint(ipv6.ip(), ipv6.port());
break;
}
default:
return make_error_code(net::error::unsupported_address);
}
if (result.port() == 0)
{
return make_error_code(net::error::invalid_port);
}
return result;
}
}
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