125 lines
3.1 KiB
C++
125 lines
3.1 KiB
C++
/*
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* Copyright (C) 2003-2015 The Music Player Daemon Project
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* http://www.musicpd.org
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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 2 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "ToString.hxx"
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#include "SocketAddress.hxx"
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#include <algorithm>
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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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#include <assert.h>
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#include <string.h>
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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)
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{
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const size_t 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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sockaddr_to_string(SocketAddress address)
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{
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#ifdef HAVE_UN
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if (address.GetFamily() == AF_UNIX)
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/* return path of UNIX domain sockets */
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return LocalAddressToString(*(const sockaddr_un *)address.GetAddress(),
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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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const struct sockaddr_in6 *a6 = (const struct sockaddr_in6 *)
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address.GetAddress();
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struct sockaddr_in a4;
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#endif
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int ret;
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char host[NI_MAXHOST], serv[NI_MAXSERV];
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#if defined(HAVE_IPV6) && defined(IN6_IS_ADDR_V4MAPPED)
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if (address.GetFamily() == AF_INET6 &&
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IN6_IS_ADDR_V4MAPPED(&a6->sin6_addr)) {
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/* convert "::ffff:127.0.0.1" to "127.0.0.1" */
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memset(&a4, 0, sizeof(a4));
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a4.sin_family = AF_INET;
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memcpy(&a4.sin_addr, ((const char *)&a6->sin6_addr) + 12,
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sizeof(a4.sin_addr));
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a4.sin_port = a6->sin6_port;
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address = { (const struct sockaddr *)&a4, sizeof(a4) };
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}
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#endif
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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 (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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