From 902e92ceedba96d3241fa8ff701c061cd53a197d Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Thu, 9 Oct 2014 20:11:16 +0200 Subject: ebtables-compat: use ebtables_command_state in bootstrap code And introduce fake ebt_entry. This gets the code in sync in other existing compat tools. This will likely allow to consolidate common infrastructure. This code is still quite experimental. Signed-off-by: Pablo Neira Ayuso --- iptables/nft-bridge.h | 98 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 98 insertions(+) create mode 100644 iptables/nft-bridge.h (limited to 'iptables/nft-bridge.h') diff --git a/iptables/nft-bridge.h b/iptables/nft-bridge.h new file mode 100644 index 00000000..1e3f0a16 --- /dev/null +++ b/iptables/nft-bridge.h @@ -0,0 +1,98 @@ +#ifndef _NFT_BRIDGE_H_ +#define _NFT_BRIDGE_H_ + +#include +//#include +#include + +/* We use replace->flags, so we can't use the following values: + * 0x01 == OPT_COMMAND, 0x02 == OPT_TABLE, 0x100 == OPT_ZERO */ +#define LIST_N 0x04 +#define LIST_C 0x08 +#define LIST_X 0x10 +#define LIST_MAC2 0x20 + +/* Be backwards compatible, so don't use '+' in kernel */ +#define IF_WILDCARD 1 + +extern unsigned char eb_mac_type_unicast[ETH_ALEN]; +extern unsigned char eb_msk_type_unicast[ETH_ALEN]; +extern unsigned char eb_mac_type_multicast[ETH_ALEN]; +extern unsigned char eb_msk_type_multicast[ETH_ALEN]; +extern unsigned char eb_mac_type_broadcast[ETH_ALEN]; +extern unsigned char eb_msk_type_broadcast[ETH_ALEN]; +extern unsigned char eb_mac_type_bridge_group[ETH_ALEN]; +extern unsigned char eb_msk_type_bridge_group[ETH_ALEN]; + +int ebt_get_mac_and_mask(const char *from, unsigned char *to, unsigned char *mask); + +/* From: include/linux/netfilter_bridge/ebtables.h + * + * Adapted for the need of the ebtables-compat. + */ + +#define EBT_TABLE_MAXNAMELEN 32 +#define EBT_CHAIN_MAXNAMELEN EBT_TABLE_MAXNAMELEN +#define EBT_FUNCTION_MAXNAMELEN EBT_TABLE_MAXNAMELEN + +/* verdicts >0 are "branches" */ +#define EBT_ACCEPT -1 +#define EBT_DROP -2 +#define EBT_CONTINUE -3 +#define EBT_RETURN -4 +#define NUM_STANDARD_TARGETS 4 + +#define EBT_ENTRY_OR_ENTRIES 0x01 +/* these are the normal masks */ +#define EBT_NOPROTO 0x02 +#define EBT_802_3 0x04 +#define EBT_SOURCEMAC 0x08 +#define EBT_DESTMAC 0x10 +#define EBT_F_MASK (EBT_NOPROTO | EBT_802_3 | EBT_SOURCEMAC | EBT_DESTMAC \ + | EBT_ENTRY_OR_ENTRIES) + +#define EBT_IPROTO 0x01 +#define EBT_IIN 0x02 +#define EBT_IOUT 0x04 +#define EBT_ISOURCE 0x8 +#define EBT_IDEST 0x10 +#define EBT_ILOGICALIN 0x20 +#define EBT_ILOGICALOUT 0x40 +#define EBT_INV_MASK (EBT_IPROTO | EBT_IIN | EBT_IOUT | EBT_ILOGICALIN \ + | EBT_ILOGICALOUT | EBT_ISOURCE | EBT_IDEST) + +/* Fake ebt_entry */ +struct ebt_entry { + /* this needs to be the first field */ + unsigned int bitmask; + unsigned int invflags; + uint16_t ethproto; + /* the physical in-dev */ + char in[IFNAMSIZ]; + /* the logical in-dev */ + char logical_in[IFNAMSIZ]; + /* the physical out-dev */ + char out[IFNAMSIZ]; + /* the logical out-dev */ + char logical_out[IFNAMSIZ]; + unsigned char sourcemac[ETH_ALEN]; + unsigned char sourcemsk[ETH_ALEN]; + unsigned char destmac[ETH_ALEN]; + unsigned char destmsk[ETH_ALEN]; + + unsigned char in_mask[IFNAMSIZ]; + unsigned char out_mask[IFNAMSIZ]; +}; + +struct ebtables_command_state { + struct ebt_entry fw; + struct xtables_target *target; + struct xtables_rule_match *matches; + const char *jumpto; + struct xt_counters counters; +}; + +void nft_rule_to_ebtables_command_state(struct nft_rule *r, + struct ebtables_command_state *cs); + +#endif -- cgit v1.2.3