From 02e7a6514e63ceca680fade40797280aef1bf55f Mon Sep 17 00:00:00 2001
From: Mark Johnston <markj@FreeBSD.org>
Date: Mon, 3 May 2021 12:42:54 -0400
Subject: [PATCH] bhyve: Set SO_REUSEADDR on the gdb stub socket

Reviewed by:	jhb
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D30037
---
 usr.sbin/bhyve/gdb.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/usr.sbin/bhyve/gdb.c b/usr.sbin/bhyve/gdb.c
index 5df10467cd62..219d192b7c9a 100644
--- a/usr.sbin/bhyve/gdb.c
+++ b/usr.sbin/bhyve/gdb.c
@@ -1821,7 +1821,7 @@ void
 init_gdb(struct vmctx *_ctx, int sport, bool wait)
 {
 	struct sockaddr_in sin;
-	int error, flags, s;
+	int error, flags, optval, s;
 
 	debug("==> starting on %d, %swaiting\n", sport, wait ? "" : "not ");
 
@@ -1837,6 +1837,9 @@ init_gdb(struct vmctx *_ctx, int sport, bool wait)
 	if (s < 0)
 		err(1, "gdb socket create");
 
+	optval = 1;
+	(void)setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
+
 	sin.sin_len = sizeof(sin);
 	sin.sin_family = AF_INET;
 	sin.sin_addr.s_addr = htonl(INADDR_ANY);