diff options
Diffstat (limited to 'iptables/nft-arp.c')
| -rw-r--r-- | iptables/nft-arp.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/iptables/nft-arp.c b/iptables/nft-arp.c index d670cbe6..edf17952 100644 --- a/iptables/nft-arp.c +++ b/iptables/nft-arp.c @@ -214,7 +214,7 @@ static void nft_arp_parse_payload(struct nft_xt_ctx *ctx, struct arpt_entry *fw = &cs->arp; struct in_addr addr; uint16_t ar_hrd, ar_pro, ar_op; - uint8_t ar_hln; + uint8_t ar_hln, ar_pln; bool inv; switch (reg->payload.offset) { @@ -246,6 +246,11 @@ static void nft_arp_parse_payload(struct nft_xt_ctx *ctx, if (inv) fw->arp.invflags |= IPT_INV_ARPOP; break; + case offsetof(struct arphdr, ar_pln): + get_cmp_data(e, &ar_pln, sizeof(ar_pln), &inv); + if (ar_pln != 4 || inv) + ctx->errmsg = "unexpected ARP protocol length match"; + break; default: if (reg->payload.offset == sizeof(struct arphdr)) { if (nft_arp_parse_devaddr(reg, e, &fw->arp.src_devaddr)) |