From: Stefano Brivio sbrivio@redhat.com
[ Upstream commit 1b4a75108d5bc153daf965d334e77e8e94534f96 ]
In commit 8cc4ccf58379 ("ipset: Allow matching on destination MAC address for mac and ipmac sets"), ipset.git commit 1543514c46a7, I added to the KADT functions for sets matching on MAC addreses the copy of source or destination MAC address depending on the configured match.
This was done correctly for hash:mac, but for hash:ip,mac and bitmap:ip,mac, copying and pasting the same code block presents an obvious problem: in these two set types, the MAC address is the second dimension, not the first one, and we are actually selecting the MAC address depending on whether the first dimension (IP address) specifies source or destination.
Fix this by checking for the IPSET_DIM_TWO_SRC flag in option flags.
This way, mixing source and destination matches for the two dimensions of ip,mac set types works as expected. With this setup:
ip netns add A ip link add veth1 type veth peer name veth2 netns A ip addr add 192.0.2.1/24 dev veth1 ip -net A addr add 192.0.2.2/24 dev veth2 ip link set veth1 up ip -net A link set veth2 up
dst=$(ip netns exec A cat /sys/class/net/veth2/address)
ip netns exec A ipset create test_bitmap bitmap:ip,mac range 192.0.0.0/16 ip netns exec A ipset add test_bitmap 192.0.2.1,${dst} ip netns exec A iptables -A INPUT -m set ! --match-set test_bitmap src,dst -j DROP
ip netns exec A ipset create test_hash hash:ip,mac ip netns exec A ipset add test_hash 192.0.2.1,${dst} ip netns exec A iptables -A INPUT -m set ! --match-set test_hash src,dst -j DROP
ipset correctly matches a test packet:
# ping -c1 192.0.2.2 >/dev/null # echo $? 0
Reported-by: Chen Yi yiche@redhat.com Fixes: 8cc4ccf58379 ("ipset: Allow matching on destination MAC address for mac and ipmac sets") Signed-off-by: Stefano Brivio sbrivio@redhat.com Signed-off-by: Jozsef Kadlecsik kadlec@netfilter.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/netfilter/ipset/ip_set_bitmap_ipmac.c | 2 +- net/netfilter/ipset/ip_set_hash_ipmac.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/netfilter/ipset/ip_set_bitmap_ipmac.c b/net/netfilter/ipset/ip_set_bitmap_ipmac.c index b73c37b3a791f..cfe7b556775f1 100644 --- a/net/netfilter/ipset/ip_set_bitmap_ipmac.c +++ b/net/netfilter/ipset/ip_set_bitmap_ipmac.c @@ -227,7 +227,7 @@ bitmap_ipmac_kadt(struct ip_set *set, const struct sk_buff *skb,
e.id = ip_to_id(map, ip);
- if (opt->flags & IPSET_DIM_ONE_SRC) + if (opt->flags & IPSET_DIM_TWO_SRC) ether_addr_copy(e.ether, eth_hdr(skb)->h_source); else ether_addr_copy(e.ether, eth_hdr(skb)->h_dest); diff --git a/net/netfilter/ipset/ip_set_hash_ipmac.c b/net/netfilter/ipset/ip_set_hash_ipmac.c index eb14434083203..24d8f4df4230c 100644 --- a/net/netfilter/ipset/ip_set_hash_ipmac.c +++ b/net/netfilter/ipset/ip_set_hash_ipmac.c @@ -93,7 +93,7 @@ hash_ipmac4_kadt(struct ip_set *set, const struct sk_buff *skb, (skb_mac_header(skb) + ETH_HLEN) > skb->data) return -EINVAL;
- if (opt->flags & IPSET_DIM_ONE_SRC) + if (opt->flags & IPSET_DIM_TWO_SRC) ether_addr_copy(e.ether, eth_hdr(skb)->h_source); else ether_addr_copy(e.ether, eth_hdr(skb)->h_dest);