net/arp: account for ARP delay, avoid duplicate packets on timeout

eth_rx() in the main reception loop may trigger sending a packet which
is already timed out (or will immediately) upon reception of an ARP reply.
As long as the ARP reply is pending, the timeout handler of a packet
should be postponed.
Happens on TFTP with bad network (e.g. WLAN).

Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/arp.h b/net/arp.h
index 43c6296..a288d61 100644
--- a/net/arp.h
+++ b/net/arp.h
@@ -25,7 +25,7 @@ void arp_init(void);
 void arp_request(void);
 void arp_raw_request(struct in_addr source_ip, const uchar *targetEther,
 	struct in_addr target_ip);
-void arp_timeout_check(void);
+int arp_timeout_check(void);
 void arp_receive(struct ethernet_hdr *et, struct ip_udp_hdr *ip, int len);
 
 #endif /* __ARP_H__ */