From e95946831f8ef53d29590735a2df661385edb008 Mon Sep 17 00:00:00 2001 From: "Matthias P. Braendli" Date: Mon, 6 Aug 2018 10:35:22 +0200 Subject: Replace boost by the standalone asio library --- lib/asio/ip/impl/network_v4.ipp | 216 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 216 insertions(+) create mode 100644 lib/asio/ip/impl/network_v4.ipp (limited to 'lib/asio/ip/impl/network_v4.ipp') diff --git a/lib/asio/ip/impl/network_v4.ipp b/lib/asio/ip/impl/network_v4.ipp new file mode 100644 index 0000000..4b27887 --- /dev/null +++ b/lib/asio/ip/impl/network_v4.ipp @@ -0,0 +1,216 @@ +// +// ip/impl/network_v4.ipp +// ~~~~~~~~~~~~~~~~~~~~~~ +// +// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com) +// Copyright (c) 2014 Oliver Kowalke (oliver dot kowalke at gmail dot com) +// +// 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) +// + +#ifndef ASIO_IP_IMPL_NETWORK_V4_IPP +#define ASIO_IP_IMPL_NETWORK_V4_IPP + +#if defined(_MSC_VER) && (_MSC_VER >= 1200) +# pragma once +#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) + +#include "asio/detail/config.hpp" +#include +#include +#include +#include +#include "asio/error.hpp" +#include "asio/detail/throw_error.hpp" +#include "asio/detail/throw_exception.hpp" +#include "asio/ip/network_v4.hpp" + +#include "asio/detail/push_options.hpp" + +namespace asio { +namespace ip { + +network_v4::network_v4(const address_v4& addr, unsigned short prefix_len) + : address_(addr), + prefix_length_(prefix_len) +{ + if (prefix_len > 32) + { + std::out_of_range ex("prefix length too large"); + asio::detail::throw_exception(ex); + } +} + +network_v4::network_v4(const address_v4& addr, const address_v4& mask) + : address_(addr), + prefix_length_(0) +{ + address_v4::bytes_type mask_bytes = mask.to_bytes(); + bool finished = false; + for (std::size_t i = 0; i < mask_bytes.size(); ++i) + { + if (finished) + { + if (mask_bytes[i]) + { + std::invalid_argument ex("non-contiguous netmask"); + asio::detail::throw_exception(ex); + } + continue; + } + else + { + switch (mask_bytes[i]) + { + case 255: + prefix_length_ += 8; + break; + case 254: // prefix_length_ += 7 + prefix_length_ += 1; + case 252: // prefix_length_ += 6 + prefix_length_ += 1; + case 248: // prefix_length_ += 5 + prefix_length_ += 1; + case 240: // prefix_length_ += 4 + prefix_length_ += 1; + case 224: // prefix_length_ += 3 + prefix_length_ += 1; + case 192: // prefix_length_ += 2 + prefix_length_ += 1; + case 128: // prefix_length_ += 1 + prefix_length_ += 1; + case 0: // nbits += 0 + finished = true; + break; + default: + std::out_of_range ex("non-contiguous netmask"); + asio::detail::throw_exception(ex); + } + } + } +} + +address_v4 network_v4::netmask() const ASIO_NOEXCEPT +{ + uint32_t nmbits = 0xffffffff; + if (prefix_length_ == 0) + nmbits = 0; + else + nmbits = nmbits << (32 - prefix_length_); + return address_v4(nmbits); +} + +address_v4_range network_v4::hosts() const ASIO_NOEXCEPT +{ + return is_host() + ? address_v4_range(address_, address_v4(address_.to_uint() + 1)) + : address_v4_range(address_v4(network().to_uint() + 1), broadcast()); +} + +bool network_v4::is_subnet_of(const network_v4& other) const +{ + if (other.prefix_length_ >= prefix_length_) + return false; // Only real subsets are allowed. + const network_v4 me(address_, other.prefix_length_); + return other.canonical() == me.canonical(); +} + +std::string network_v4::to_string() const +{ + asio::error_code ec; + std::string addr = to_string(ec); + asio::detail::throw_error(ec); + return addr; +} + +std::string network_v4::to_string(asio::error_code& ec) const +{ + using namespace std; // For sprintf. + ec = asio::error_code(); + char prefix_len[16]; +#if defined(ASIO_HAS_SECURE_RTL) + sprintf_s(prefix_len, sizeof(prefix_len), "/%u", prefix_length_); +#else // defined(ASIO_HAS_SECURE_RTL) + sprintf(prefix_len, "/%u", prefix_length_); +#endif // defined(ASIO_HAS_SECURE_RTL) + return address_.to_string() + prefix_len; +} + +network_v4 make_network_v4(const char* str) +{ + return make_network_v4(std::string(str)); +} + +network_v4 make_network_v4(const char* str, asio::error_code& ec) +{ + return make_network_v4(std::string(str), ec); +} + +network_v4 make_network_v4(const std::string& str) +{ + asio::error_code ec; + network_v4 net = make_network_v4(str, ec); + asio::detail::throw_error(ec); + return net; +} + +network_v4 make_network_v4(const std::string& str, + asio::error_code& ec) +{ + std::string::size_type pos = str.find_first_of("/"); + + if (pos == std::string::npos) + { + ec = asio::error::invalid_argument; + return network_v4(); + } + + if (pos == str.size() - 1) + { + ec = asio::error::invalid_argument; + return network_v4(); + } + + std::string::size_type end = str.find_first_not_of("0123456789", pos + 1); + if (end != std::string::npos) + { + ec = asio::error::invalid_argument; + return network_v4(); + } + + const address_v4 addr = make_address_v4(str.substr(0, pos), ec); + if (ec) + return network_v4(); + + const int prefix_len = std::atoi(str.substr(pos + 1).c_str()); + if (prefix_len < 0 || prefix_len > 32) + { + ec = asio::error::invalid_argument; + return network_v4(); + } + + return network_v4(addr, static_cast(prefix_len)); +} + +#if defined(ASIO_HAS_STRING_VIEW) + +network_v4 make_network_v4(string_view str) +{ + return make_network_v4(static_cast(str)); +} + +network_v4 make_network_v4(string_view str, + asio::error_code& ec) +{ + return make_network_v4(static_cast(str), ec); +} + +#endif // defined(ASIO_HAS_STRING_VIEW) + +} // namespace ip +} // namespace asio + +#include "asio/detail/pop_options.hpp" + +#endif // ASIO_IP_IMPL_NETWORK_V4_IPP -- cgit v1.2.3