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slirp: handle deferred ECONNREFUSED on non-blocking TCP sockets

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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>
This commit is contained in:
Steven Luo 2016-04-06 22:04:55 -07:00 committed by Samuel Thibault
parent 27d92ebc5e
commit 6625d83a6e
2 changed files with 7 additions and 1 deletions
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2
slirp/socket.c
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@ -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 {

6
slirp/tcp_input.c
View File

@ -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;