socket_util: move sockaddr_to_string() to resolver.c

1 files changed, 83 insertions, 0 deletions

diff --git a/src/resolver.c b/src/resolver.c
new file mode 100644
index 00000000..81099b2a
--- /dev/null
+++ b/src/resolver.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2003-2011 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "resolver.h"
+
+#ifndef G_OS_WIN32
+#include <sys/socket.h>
+#include <netdb.h>
+#else /* G_OS_WIN32 */
+#define WINVER 0x0501
+#include <ws2tcpip.h>
+#include <winsock.h>
+#endif /* G_OS_WIN32 */
+
+#ifdef HAVE_IPV6
+#include <string.h>
+#endif
+
+char *
+sockaddr_to_string(const struct sockaddr *sa, size_t length, GError **error)
+{
+#if defined(HAVE_IPV6) && defined(IN6_IS_ADDR_V4MAPPED)
+	const struct sockaddr_in6 *a6 = (const struct sockaddr_in6 *)sa;
+	struct sockaddr_in a4;
+#endif
+	int ret;
+	char host[NI_MAXHOST], serv[NI_MAXSERV];
+
+#if defined(HAVE_IPV6) && defined(IN6_IS_ADDR_V4MAPPED)
+	if (sa->sa_family == AF_INET6 &&
+	    IN6_IS_ADDR_V4MAPPED(&a6->sin6_addr)) {
+		/* convert "::ffff:127.0.0.1" to "127.0.0.1" */
+
+		memset(&a4, 0, sizeof(a4));
+		a4.sin_family = AF_INET;
+		memcpy(&a4.sin_addr, ((const char *)&a6->sin6_addr) + 12,
+		       sizeof(a4.sin_addr));
+		a4.sin_port = a6->sin6_port;
+
+		sa = (const struct sockaddr *)&a4;
+		length = sizeof(a4);
+	}
+#endif
+
+	ret = getnameinfo(sa, length, host, sizeof(host), serv, sizeof(serv),
+			  NI_NUMERICHOST|NI_NUMERICSERV);
+	if (ret != 0) {
+		g_set_error(error, g_quark_from_static_string("netdb"), ret,
+			    "%s", gai_strerror(ret));
+		return NULL;
+	}
+
+#ifdef HAVE_UN
+	if (sa->sa_family == AF_UNIX)
+		/* "serv" contains corrupt information with unix
+		   sockets */
+		return g_strdup(host);
+#endif
+
+#ifdef HAVE_IPV6
+	if (strchr(host, ':') != NULL)
+		return g_strconcat("[", host, "]:", serv, NULL);
+#endif
+
+	return g_strconcat(host, ":", serv, NULL);
+}