1 files changed, 73 insertions, 0 deletions
diff --git a/lib/samples/sample-gai.c b/lib/samples/sample-gai.c
new file mode 100644
index 0000000..8b56ab9
--- /dev/null
+++ b/lib/samples/sample-gai.c
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+
+#include <config.h>
+
+#include <isc/net.h>
+#include <isc/print.h>
+
+#include <irs/netdb.h>
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+static void
+do_gai(int family, char *hostname) {
+	struct addrinfo hints, *res, *res0;
+	int error;
+	char namebuf[1024], addrbuf[1024], servbuf[1024];
+
+	memset(&hints, 0, sizeof(hints));
+	hints.ai_family = family;
+	hints.ai_socktype = SOCK_STREAM;
+	hints.ai_flags = AI_CANONNAME;
+	error = getaddrinfo(hostname, "http", &hints, &res0);
+	if (error) {
+		fprintf(stderr, "getaddrinfo failed for %s,family=%d: %s\n",
+			hostname, family, gai_strerror(error));
+		return;
+	}
+
+	for (res = res0; res; res = res->ai_next) {
+		error = getnameinfo(res->ai_addr,
+				    (socklen_t)res->ai_addrlen,
+				    addrbuf, sizeof(addrbuf),
+				    NULL, 0, NI_NUMERICHOST);
+		if (error == 0)
+			error = getnameinfo(res->ai_addr,
+					    (socklen_t)res->ai_addrlen,
+					    namebuf, sizeof(namebuf),
+					    servbuf, sizeof(servbuf), 0);
+		if (error != 0) {
+			fprintf(stderr, "getnameinfo failed: %s\n",
+				gai_strerror(error));
+		} else {
+			printf("%s(%s/%s)=%s:%s\n", hostname,
+			       res->ai_canonname, addrbuf, namebuf, servbuf);
+		}
+	}
+
+	freeaddrinfo(res0);
+}
+
+int
+main(int argc, char *argv[]) {
+	if (argc < 2)
+		exit(1);
+
+	do_gai(AF_INET, argv[1]);
+	do_gai(AF_INET6, argv[1]);
+	do_gai(AF_UNSPEC, argv[1]);
+
+	return (0);
+}