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Make ARP replies at least 64 bytes long

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IEEE 802.3 standard requires Ethernet frames to be at least 64 bytes long.
If it is not the case, they will be considered as runt frames, and may be ignored by netcard and/or OS

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
This commit is contained in:
Hervé Poussineau 2010-09-15 22:33:26 +02:00 committed by Edgar E. Iglesias
parent 0d491754d0
commit dbf3c4b4ba
1 changed files with 2 additions and 1 deletions
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3
slirp/slirp.c
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@ -599,7 +599,7 @@ static void arp_input(Slirp *slirp, const uint8_t *pkt, int pkt_len)
{
struct ethhdr *eh = (struct ethhdr *)pkt;
struct arphdr *ah = (struct arphdr *)(pkt + ETH_HLEN);
uint8_t arp_reply[ETH_HLEN + sizeof(struct arphdr)];
uint8_t arp_reply[max(ETH_HLEN + sizeof(struct arphdr), 64)];
struct ethhdr *reh = (struct ethhdr *)arp_reply;
struct arphdr *rah = (struct arphdr *)(arp_reply + ETH_HLEN);
int ar_op;
@ -619,6 +619,7 @@ static void arp_input(Slirp *slirp, const uint8_t *pkt, int pkt_len)
}
return;
arp_ok:
memset(arp_reply, 0, sizeof(arp_reply));
/* XXX: make an ARP request to have the client address */
memcpy(slirp->client_ethaddr, eh->h_source, ETH_ALEN);