148 lines
3.9 KiB
C++
148 lines
3.9 KiB
C++
/*
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* Copyright 2011-2021 Max Kellermann <max.kellermann@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "ToString.hxx"
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#include "Features.hxx"
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#include "SocketAddress.hxx"
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#include "IPv4Address.hxx"
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#include <algorithm>
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#include <cassert>
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#include <cstring>
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#ifdef _WIN32
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#include <ws2tcpip.h>
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#else
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#include <netdb.h>
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#ifdef HAVE_TCP
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#include <netinet/in.h>
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#endif
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#endif
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#ifdef HAVE_UN
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#include <sys/un.h>
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#endif
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#ifdef HAVE_UN
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static std::string
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LocalAddressToString(const struct sockaddr_un &s_un, size_t size) noexcept
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{
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const auto prefix_size = (size_t)
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((struct sockaddr_un *)nullptr)->sun_path;
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assert(size >= prefix_size);
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size_t result_length = size - prefix_size;
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/* remove the trailing null terminator */
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if (result_length > 0 && s_un.sun_path[result_length - 1] == 0)
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--result_length;
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if (result_length == 0)
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return "local";
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std::string result(s_un.sun_path, result_length);
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/* replace all null bytes with '@'; this also handles abstract
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addresses (Linux specific) */
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std::replace(result.begin(), result.end(), '\0', '@');
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return result;
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}
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#endif
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std::string
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ToString(SocketAddress address) noexcept
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{
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#ifdef HAVE_UN
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if (address.GetFamily() == AF_LOCAL)
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/* return path of local socket */
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return LocalAddressToString(address.CastTo<struct sockaddr_un>(),
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address.GetSize());
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#endif
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#if defined(HAVE_IPV6) && defined(IN6_IS_ADDR_V4MAPPED)
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IPv4Address ipv4_buffer;
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if (address.IsV4Mapped())
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address = ipv4_buffer = address.UnmapV4();
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#endif
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char host[NI_MAXHOST], serv[NI_MAXSERV];
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int ret = getnameinfo(address.GetAddress(), address.GetSize(),
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host, sizeof(host), serv, sizeof(serv),
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NI_NUMERICHOST|NI_NUMERICSERV);
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if (ret != 0)
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return "unknown";
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#ifdef HAVE_IPV6
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if (std::strchr(host, ':') != nullptr) {
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std::string result("[");
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result.append(host);
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result.append("]:");
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result.append(serv);
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return result;
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}
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#endif
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std::string result(host);
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result.push_back(':');
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result.append(serv);
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return result;
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}
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std::string
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HostToString(SocketAddress address) noexcept
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{
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if (address.IsNull())
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return "null";
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#ifdef HAVE_UN
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if (address.GetFamily() == AF_LOCAL)
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/* return path of local socket */
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return LocalAddressToString(address.CastTo<struct sockaddr_un>(),
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address.GetSize());
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#endif
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#if defined(HAVE_IPV6) && defined(IN6_IS_ADDR_V4MAPPED)
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IPv4Address ipv4_buffer;
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if (address.IsV4Mapped())
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address = ipv4_buffer = address.UnmapV4();
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#endif
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char host[NI_MAXHOST], serv[NI_MAXSERV];
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int ret = getnameinfo(address.GetAddress(), address.GetSize(),
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host, sizeof(host), serv, sizeof(serv),
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NI_NUMERICHOST|NI_NUMERICSERV);
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if (ret != 0)
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return "unknown";
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return host;
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}
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