netfilter: ebtables: add support for matching IGMP type

We already have ICMPv6 type/code matches (which can be used to distinguish different types of MLD packets). Add support for IPv4 IGMP matches in the same way.

Matthias Schiffer committed 8 years ago

Commit 78d9f4d1 parent 5adc1662 files · +20 −3Browse files

Showing the changes to include/uapi/linux (1 of 2 files). Show all

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include/uapi/linux/netfilter_bridge/ebt_ip.h+3−1

@@ -25,8 +25,9 @@ · 24 unmodified lines
25	25	#define EBT_IP_SPORT 0x10
26	26	#define EBT_IP_DPORT 0x20
27	27	#define EBT_IP_ICMP 0x40
	28	+#define EBT_IP_IGMP 0x80
28	29	#define EBT_IP_MASK (EBT_IP_SOURCE \| EBT_IP_DEST \| EBT_IP_TOS \| EBT_IP_PROTO \|\
29		− EBT_IP_SPORT \| EBT_IP_DPORT \| EBT_IP_ICMP)
	30	+ EBT_IP_SPORT \| EBT_IP_DPORT \| EBT_IP_ICMP \| EBT_IP_IGMP)
30	31	#define EBT_IP_MATCH "ip"
31	32
32	33	/* the same values are used for the invflags */
@@ -42,6 +43,7 @@ struct ebt_ip_info { · 9 unmodified lines
42	43	union {
43	44	__u16 sport[2];
44	45	__u8 icmp_type[2];
	46	+ __u8 igmp_type[2];
45	47	};
46	48	union {
47	49	__u16 dport[2];