slirp: Only start packet expiration for delayed ones

The expiration timeout must only affect packets that are queued due to
pending ARP resolutions. The old version broke ping e.g.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/slirp.c b/slirp.c
index 98c94ec..9779666 100644
--- a/slirp.c
+++ b/slirp.c
@@ -735,6 +735,9 @@ int if_encap(Slirp *slirp, struct mbuf *ifm)
             slirp->client_ipaddr = iph->ip_dst;
             slirp_output(slirp->opaque, arp_req, sizeof(arp_req));
             ifm->arp_requested = true;
+
+            /* Expire request and drop outgoing packet after 1 second */
+            ifm->expiration_date = qemu_get_clock_ns(rt_clock) + 1000000000ULL;
         }
         return 0;
     } else {