143 lines
3.6 KiB
C
143 lines
3.6 KiB
C
/*
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* Copyright (C) 2003-2011 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 "resolver.h"
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#include "glib_compat.h"
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#ifndef G_OS_WIN32
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#include <sys/socket.h>
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#include <netdb.h>
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#else /* G_OS_WIN32 */
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#define WINVER 0x0501
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#include <ws2tcpip.h>
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#include <winsock.h>
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#endif /* G_OS_WIN32 */
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#include <string.h>
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char *
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sockaddr_to_string(const struct sockaddr *sa, size_t length, GError **error)
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{
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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 *)sa;
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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 (sa->sa_family == 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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sa = (const struct sockaddr *)&a4;
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length = sizeof(a4);
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}
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#endif
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ret = getnameinfo(sa, length, 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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g_set_error(error, g_quark_from_static_string("netdb"), ret,
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"%s", gai_strerror(ret));
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return NULL;
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}
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#ifdef HAVE_UN
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if (sa->sa_family == AF_UNIX)
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/* "serv" contains corrupt information with unix
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sockets */
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return g_strdup(host);
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#endif
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#ifdef HAVE_IPV6
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if (strchr(host, ':') != NULL)
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return g_strconcat("[", host, "]:", serv, NULL);
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#endif
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return g_strconcat(host, ":", serv, NULL);
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}
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struct addrinfo *
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resolve_host_port(const char *host_port, unsigned default_port,
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int flags, int socktype,
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GError **error_r)
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{
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char *p = g_strdup(host_port);
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const char *host = p, *port = NULL;
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if (host_port[0] == '[') {
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/* IPv6 needs enclosing square braces, to
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differentiate between IP colons and the port
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separator */
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char *q = strchr(p + 1, ']');
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if (q != NULL && q[1] == ':' && q[2] != 0) {
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*q = 0;
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++host;
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port = q + 2;
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}
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}
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if (port == NULL) {
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/* port is after the colon, but only if it's the only
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colon (don't split IPv6 addresses) */
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char *q = strchr(p, ':');
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if (q != NULL && q[1] != 0 && strchr(q + 1, ':') == NULL) {
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*q = 0;
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port = q + 1;
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}
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}
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char buffer[32];
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if (port == NULL && default_port != 0) {
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g_snprintf(buffer, sizeof(buffer), "%u", default_port);
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port = buffer;
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}
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if ((flags & AI_PASSIVE) != 0 && strcmp(host, "*") == 0)
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host = NULL;
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const struct addrinfo hints = {
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.ai_flags = flags,
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.ai_family = AF_UNSPEC,
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.ai_socktype = socktype,
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};
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struct addrinfo *ai;
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int ret = getaddrinfo(host, port, &hints, &ai);
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g_free(p);
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if (ret != 0) {
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g_set_error(error_r, resolver_quark(), ret,
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"Failed to look up '%s': %s",
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host_port, gai_strerror(ret));
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return NULL;
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}
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return ai;
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}
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