diff options
| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2019-05-22 22:06:16 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2019-05-24 21:14:30 +0200 |
| commit | 4b0f2a712b5792d2842d89fe68d4230e0eb05c7e (patch) | |
| tree | 954a866715d95529e65f39c3ff90920973186ac1 /src/proto.c | |
| parent | eeda228c2d1719f5b6276b40ad14a5b3c3e88536 (diff) | |
src: support for arp sender and target ethernet and IPv4 addresses
# nft add table arp x
# nft add chain arp x y { type filter hook input priority 0\; }
# nft add rule arp x y arp saddr ip 192.168.2.1 counter
Testing this:
# ip neigh flush dev eth0
# ping 8.8.8.8
# nft list ruleset
table arp x {
chain y {
type filter hook input priority filter; policy accept;
arp saddr ip 192.168.2.1 counter packets 1 bytes 46
}
}
You can also specify hardware sender address, eg.
# nft add rule arp x y arp saddr ether aa:bb:cc:aa:bb:cc drop counter
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'src/proto.c')
| -rw-r--r-- | src/proto.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/src/proto.c b/src/proto.c index f68fb684..67e86f20 100644 --- a/src/proto.c +++ b/src/proto.c @@ -874,23 +874,29 @@ const struct datatype arpop_type = { }; #define ARPHDR_TYPE(__name, __type, __member) \ - HDR_TYPE(__name, __type, struct arphdr, __member) + HDR_TYPE(__name, __type, struct arp_hdr, __member) #define ARPHDR_FIELD(__name, __member) \ - HDR_FIELD(__name, struct arphdr, __member) + HDR_FIELD(__name, struct arp_hdr, __member) const struct proto_desc proto_arp = { .name = "arp", .base = PROTO_BASE_NETWORK_HDR, .templates = { - [ARPHDR_HRD] = ARPHDR_FIELD("htype", ar_hrd), - [ARPHDR_PRO] = ARPHDR_TYPE("ptype", ðertype_type, ar_pro), - [ARPHDR_HLN] = ARPHDR_FIELD("hlen", ar_hln), - [ARPHDR_PLN] = ARPHDR_FIELD("plen", ar_pln), - [ARPHDR_OP] = ARPHDR_TYPE("operation", &arpop_type, ar_op), + [ARPHDR_HRD] = ARPHDR_FIELD("htype", htype), + [ARPHDR_PRO] = ARPHDR_TYPE("ptype", ðertype_type, ptype), + [ARPHDR_HLN] = ARPHDR_FIELD("hlen", hlen), + [ARPHDR_PLN] = ARPHDR_FIELD("plen", plen), + [ARPHDR_OP] = ARPHDR_TYPE("operation", &arpop_type, oper), + [ARPHDR_SADDR_ETHER] = ARPHDR_TYPE("saddr ether", ðeraddr_type, sha), + [ARPHDR_DADDR_ETHER] = ARPHDR_TYPE("daddr ether", ðeraddr_type, tha), + [ARPHDR_SADDR_IP] = ARPHDR_TYPE("saddr ip", &ipaddr_type, spa), + [ARPHDR_DADDR_IP] = ARPHDR_TYPE("daddr ip", &ipaddr_type, tpa), }, .format = { .filter = (1 << ARPHDR_HRD) | (1 << ARPHDR_PRO) | - (1 << ARPHDR_HLN) | (1 << ARPHDR_PLN), + (1 << ARPHDR_HLN) | (1 << ARPHDR_PLN) | + (1 << ARPHDR_SADDR_ETHER) | (1 << ARPHDR_DADDR_ETHER) | + (1 << ARPHDR_SADDR_IP) | (1 << ARPHDR_DADDR_IP), }, }; |