diff options
Diffstat (limited to 'include/linux/netfilter_bridge/ebt_802_3.h')
-rw-r--r-- | include/linux/netfilter_bridge/ebt_802_3.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/include/linux/netfilter_bridge/ebt_802_3.h b/include/linux/netfilter_bridge/ebt_802_3.h new file mode 100644 index 00000000000..b9f712c14a0 --- /dev/null +++ b/include/linux/netfilter_bridge/ebt_802_3.h @@ -0,0 +1,69 @@ +#ifndef __LINUX_BRIDGE_EBT_802_3_H +#define __LINUX_BRIDGE_EBT_802_3_H + +#define EBT_802_3_SAP 0x01 +#define EBT_802_3_TYPE 0x02 + +#define EBT_802_3_MATCH "802_3" + +/* + * If frame has DSAP/SSAP value 0xaa you must check the SNAP type + * to discover what kind of packet we're carrying. + */ +#define CHECK_TYPE 0xaa + +/* + * Control field may be one or two bytes. If the first byte has + * the value 0x03 then the entire length is one byte, otherwise it is two. + * One byte controls are used in Unnumbered Information frames. + * Two byte controls are used in Numbered Information frames. + */ +#define IS_UI 0x03 + +#define EBT_802_3_MASK (EBT_802_3_SAP | EBT_802_3_TYPE | EBT_802_3) + +/* ui has one byte ctrl, ni has two */ +struct hdr_ui { + uint8_t dsap; + uint8_t ssap; + uint8_t ctrl; + uint8_t orig[3]; + uint16_t type; +}; + +struct hdr_ni { + uint8_t dsap; + uint8_t ssap; + uint16_t ctrl; + uint8_t orig[3]; + uint16_t type; +}; + +struct ebt_802_3_hdr { + uint8_t daddr[6]; + uint8_t saddr[6]; + uint16_t len; + union { + struct hdr_ui ui; + struct hdr_ni ni; + } llc; +}; + +#ifdef __KERNEL__ +#include <linux/skbuff.h> + +static inline struct ebt_802_3_hdr *ebt_802_3_hdr(const struct sk_buff *skb) +{ + return (struct ebt_802_3_hdr *)skb->mac.raw; +} +#endif + +struct ebt_802_3_info +{ + uint8_t sap; + uint16_t type; + uint8_t bitmask; + uint8_t invflags; +}; + +#endif |