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-rw-r--r--net/rarp.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/net/rarp.c b/net/rarp.c
index da50961..a715c2c 100644
--- a/net/rarp.c
+++ b/net/rarp.c
@@ -88,11 +88,13 @@ void RarpRequest(void)
{
uchar *pkt;
struct arp_hdr *rarp;
+ int eth_hdr_size;
printf("RARP broadcast %d\n", ++RarpTry);
pkt = NetTxPacket;
- pkt += NetSetEther(pkt, NetBcastAddr, PROT_RARP);
+ eth_hdr_size = NetSetEther(pkt, NetBcastAddr, PROT_RARP);
+ pkt += eth_hdr_size;
rarp = (struct arp_hdr *)pkt;
@@ -108,7 +110,7 @@ void RarpRequest(void)
/* dest IP addr set to broadcast */
memset(&rarp->ar_data[16], 0xff, 4);
- NetSendPacket(NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
+ NetSendPacket(NetTxPacket, eth_hdr_size + ARP_HDR_SIZE);
NetSetTimeout(TIMEOUT, RarpTimeout);
}