diff mbox

[PULL,4/4] slirp: handle deferred ECONNREFUSED on non-blocking TCP sockets

Message ID 1460018068-7909-5-git-send-email-samuel.thibault@ens-lyon.org (mailing list archive)
State New, archived
Headers show

Commit Message

Samuel Thibault April 7, 2016, 8:34 a.m. UTC 
From: Steven Luo <steven+qemu@steven676.net>

slirp currently only handles ECONNREFUSED in the case where connect()
returns immediately with that error; since we use non-blocking sockets,
most of the time we won't receive the error until we later try to read
from the socket.  Ensure that we deliver the appropriate RST to the
guest in this case.

Signed-off-by: Steven Luo <steven+qemu@steven676.net>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
---
 slirp/socket.c    | 2 +-
 slirp/tcp_input.c | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/slirp/socket.c b/slirp/socket.c
index 0d67b12..bd97b2d 100644
--- a/slirp/socket.c
+++ b/slirp/socket.c
@@ -188,7 +188,7 @@  soread(struct socket *so)
 			DEBUG_MISC((dfd, " --- soread() disconnected, nn = %d, errno = %d-%s\n", nn, errno,strerror(errno)));
 			sofcantrcvmore(so);
 
-			if (err == ECONNRESET
+			if (err == ECONNRESET || err == ECONNREFUSED
 			    || err == ENOTCONN || err == EPIPE) {
 				tcp_drop(sototcpcb(so), err);
 			} else {
diff --git a/slirp/tcp_input.c b/slirp/tcp_input.c
index 1fcca30..5433e7f 100644
--- a/slirp/tcp_input.c
+++ b/slirp/tcp_input.c
@@ -725,6 +725,12 @@  findso:
 	    so->so_ti = ti;
 	    tp->t_timer[TCPT_KEEP] = TCPTV_KEEP_INIT;
 	    tp->t_state = TCPS_SYN_RECEIVED;
+	    /*
+	     * Initialize receive sequence numbers now so that we can send a
+	     * valid RST if the remote end rejects our connection.
+	     */
+	    tp->irs = ti->ti_seq;
+	    tcp_rcvseqinit(tp);
 	    tcp_template(tp);
 	  }
 	  return;