libmpdclient: added resolver library

The resolver library provides unified access to all resolvers
(getaddrinfo(), gethostbyname(), Unix domain sockets).  Like
getaddrinfo(), it can return more than one address for a host name.
This fixes bug 1517 (http://www.musicpd.org/mantis/view.php?id=1517).

1 files changed, 56 insertions, 0 deletions

diff --git a/src/resolver.h b/src/resolver.h
new file mode 100644
index 000000000..6a79dc4cb
--- /dev/null
+++ b/src/resolver.h
@@ -0,0 +1,56 @@
+/* libmpdclient
+   (c) 2008 Max Kellermann <max@duempel.org>
+   This project's homepage is: http://www.musicpd.org
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+
+   - Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+
+   - Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+
+   - Neither the name of the Music Player Daemon nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
+   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef LIBMPDCLIENT_RESOLVER_H
+#define LIBMPDCLIENT_RESOLVER_H
+
+#include <stddef.h>
+
+struct resolver;
+
+struct resolver_address {
+	int family;
+	int protocol;
+	size_t addrlen;
+	const struct sockaddr *addr;
+};
+
+struct resolver *
+resolver_new(const char *host, int port);
+
+void
+resolver_free(struct resolver *resolver);
+
+const struct resolver_address *
+resolver_next(struct resolver *resolver);
+
+#endif