![Al Viro](/assets/img/avatar_default.png)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
70 lines
1.3 KiB
C
70 lines
1.3 KiB
C
#ifndef __LINUX_BRIDGE_EBT_802_3_H
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#define __LINUX_BRIDGE_EBT_802_3_H
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#define EBT_802_3_SAP 0x01
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#define EBT_802_3_TYPE 0x02
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#define EBT_802_3_MATCH "802_3"
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/*
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* If frame has DSAP/SSAP value 0xaa you must check the SNAP type
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* to discover what kind of packet we're carrying.
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*/
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#define CHECK_TYPE 0xaa
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/*
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* Control field may be one or two bytes. If the first byte has
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* the value 0x03 then the entire length is one byte, otherwise it is two.
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* One byte controls are used in Unnumbered Information frames.
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* Two byte controls are used in Numbered Information frames.
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*/
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#define IS_UI 0x03
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#define EBT_802_3_MASK (EBT_802_3_SAP | EBT_802_3_TYPE | EBT_802_3)
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/* ui has one byte ctrl, ni has two */
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struct hdr_ui {
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uint8_t dsap;
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uint8_t ssap;
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uint8_t ctrl;
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uint8_t orig[3];
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__be16 type;
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};
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struct hdr_ni {
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uint8_t dsap;
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uint8_t ssap;
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__be16 ctrl;
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uint8_t orig[3];
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__be16 type;
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};
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struct ebt_802_3_hdr {
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uint8_t daddr[6];
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uint8_t saddr[6];
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__be16 len;
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union {
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struct hdr_ui ui;
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struct hdr_ni ni;
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} llc;
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};
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#ifdef __KERNEL__
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#include <linux/skbuff.h>
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static inline struct ebt_802_3_hdr *ebt_802_3_hdr(const struct sk_buff *skb)
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{
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return (struct ebt_802_3_hdr *)skb->mac.raw;
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}
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#endif
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struct ebt_802_3_info
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{
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uint8_t sap;
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__be16 type;
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uint8_t bitmask;
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uint8_t invflags;
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};
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#endif
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