From: Sepherosa Ziehau <sephe@dragonflybsd.org>
Date: Tue, 17 Nov 2015 06:51:00 +0000 (+0800)
Subject: udp: Wakeup callers sleeping on failed to connect socket.
X-Git-Tag: v4.5.0~59
X-Git-Url: https://gitweb.dragonflybsd.org/dragonfly.git/commitdiff_plain/1b40a5cfd8b6eee2522ca6337e9309c178cf9f4e

udp: Wakeup callers sleeping on failed to connect socket.
---

diff --git a/sys/netinet/udp_usrreq.c b/sys/netinet/udp_usrreq.c
index 3d1b97777a..bbc96b7caf 100644
--- a/sys/netinet/udp_usrreq.c
+++ b/sys/netinet/udp_usrreq.c
@@ -1592,7 +1592,18 @@ out:
 		lwkt_rele(td);
 	if (error && (msg->connect.nm_flags & PRUC_ASYNC)) {
 		so->so_error = error;
-		soclrstate(so, SS_ISCONNECTED);		/* XXX */
+		soclrstate(so, SS_ISCONNECTED);
+		/*
+		 * Wake up callers blocked on this socket to make sure
+		 * that they can see this error.
+		 *
+		 * NOTE:
+		 * sodisconnected() can't be used here, which bricks
+		 * sending and receiving.
+		 */
+		wakeup(&so->so_timeo);
+		sowwakeup(so);
+		sorwakeup(so);
 	}
 	if (error && inp != NULL && inp->inp_lport != 0 &&
 	    (inp->inp_flags & INP_WILDCARD) == 0) {