1 files changed, 90 insertions, 0 deletions
diff --git a/regress/sys/netinet6/srcaddr/srcaddr.c b/regress/sys/netinet6/srcaddr/srcaddr.c
new file mode 100644
index 00000000000..909645ae835
--- /dev/null
+++ b/regress/sys/netinet6/srcaddr/srcaddr.c
@@ -0,0 +1,90 @@
+/*	$OpenBSD: srcaddr.c,v 1.1 2020/04/13 03:09:29 pamela Exp $	*/
+
+/*
+ * Copyright (c) 2020 Pamela Mosiejczuk <pamela@openbsd.org>
+ * Copyright (c) 2020 Florian Obser <florian@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <err.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+__dead void	usage(void);
+
+/* given an IPv6 destination address, return the source address selected */
+int
+main(int argc, char *argv[])
+{
+	struct addrinfo		 hints, *res;
+	struct sockaddr_storage	 ss;
+	socklen_t		 len;
+	int			 ch, error, s;
+	char			*target, src[NI_MAXHOST];
+
+	while ((ch = getopt(argc, argv, "")) != -1) {
+		switch (ch) {
+		default:
+			usage();
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+	if (argc != 1)
+		usage();
+
+	target = *argv;
+
+	memset(&hints, 0, sizeof(hints));
+	hints.ai_flags = AI_NUMERICHOST | AI_NUMERICSERV;
+	hints.ai_family = AF_INET6;
+	hints.ai_socktype = SOCK_DGRAM;
+
+	if ((error = getaddrinfo(target, "8888", &hints, &res)))
+		errx(1, "%s", gai_strerror(error));
+
+	s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
+	if (s == -1)
+		err(1, "socket");
+
+	if (connect(s, res->ai_addr, res->ai_addrlen) == -1)
+		err(1, "connect");
+	freeaddrinfo(res);
+
+	len = sizeof(ss);
+	if (getsockname(s, (struct sockaddr *)&ss, &len) == -1)
+		err(1, "getsockname");
+
+	if ((error = getnameinfo((struct sockaddr *)&ss, ss.ss_len, src,
+	    sizeof(src), NULL, 0, NI_NUMERICHOST | NI_NUMERICSERV)))
+		errx(1, "%s", gai_strerror(error));
+
+	printf("%s\n", src);
+
+	return (0);
+}
+
+__dead void
+usage(void)
+{
+	fprintf(stderr, "usage: srcaddr destination\n");
+	exit (1);
+}