1 files changed, 272 insertions, 0 deletions
diff --git a/include/uapi/linux/if_packet.h b/include/uapi/linux/if_packet.h
new file mode 100644
index 0000000..f379929
--- /dev/null
+++ b/include/uapi/linux/if_packet.h
@@ -0,0 +1,272 @@
+#ifndef __LINUX_IF_PACKET_H
+#define __LINUX_IF_PACKET_H
+
+#include <linux/types.h>
+
+struct sockaddr_pkt {
+	unsigned short spkt_family;
+	unsigned char spkt_device[14];
+	__be16 spkt_protocol;
+};
+
+struct sockaddr_ll {
+	unsigned short	sll_family;
+	__be16		sll_protocol;
+	int		sll_ifindex;
+	unsigned short	sll_hatype;
+	unsigned char	sll_pkttype;
+	unsigned char	sll_halen;
+	unsigned char	sll_addr[8];
+};
+
+/* Packet types */
+
+#define PACKET_HOST		0		/* To us		*/
+#define PACKET_BROADCAST	1		/* To all		*/
+#define PACKET_MULTICAST	2		/* To group		*/
+#define PACKET_OTHERHOST	3		/* To someone else 	*/
+#define PACKET_OUTGOING		4		/* Outgoing of any type */
+/* These ones are invisible by user level */
+#define PACKET_LOOPBACK		5		/* MC/BRD frame looped back */
+#define PACKET_FASTROUTE	6		/* Fastrouted frame	*/
+
+/* Packet socket options */
+
+#define PACKET_ADD_MEMBERSHIP		1
+#define PACKET_DROP_MEMBERSHIP		2
+#define PACKET_RECV_OUTPUT		3
+/* Value 4 is still used by obsolete turbo-packet. */
+#define PACKET_RX_RING			5
+#define PACKET_STATISTICS		6
+#define PACKET_COPY_THRESH		7
+#define PACKET_AUXDATA			8
+#define PACKET_ORIGDEV			9
+#define PACKET_VERSION			10
+#define PACKET_HDRLEN			11
+#define PACKET_RESERVE			12
+#define PACKET_TX_RING			13
+#define PACKET_LOSS			14
+#define PACKET_VNET_HDR			15
+#define PACKET_TX_TIMESTAMP		16
+#define PACKET_TIMESTAMP		17
+#define PACKET_FANOUT			18
+
+#define PACKET_FANOUT_HASH		0
+#define PACKET_FANOUT_LB		1
+#define PACKET_FANOUT_CPU		2
+#define PACKET_FANOUT_FLAG_DEFRAG	0x8000
+
+struct tpacket_stats {
+	unsigned int	tp_packets;
+	unsigned int	tp_drops;
+};
+
+struct tpacket_stats_v3 {
+	unsigned int	tp_packets;
+	unsigned int	tp_drops;
+	unsigned int	tp_freeze_q_cnt;
+};
+
+union tpacket_stats_u {
+	struct tpacket_stats stats1;
+	struct tpacket_stats_v3 stats3;
+};
+
+struct tpacket_auxdata {
+	__u32		tp_status;
+	__u32		tp_len;
+	__u32		tp_snaplen;
+	__u16		tp_mac;
+	__u16		tp_net;
+	__u16		tp_vlan_tci;
+	__u16		tp_padding;
+};
+
+/* Rx ring - header status */
+#define TP_STATUS_KERNEL	0x0
+#define TP_STATUS_USER		0x1
+#define TP_STATUS_COPY		0x2
+#define TP_STATUS_LOSING	0x4
+#define TP_STATUS_CSUMNOTREADY	0x8
+#define TP_STATUS_VLAN_VALID   0x10 /* auxdata has valid tp_vlan_tci */
+#define TP_STATUS_BLK_TMO	0x20
+
+/* Tx ring - header status */
+#define TP_STATUS_AVAILABLE	0x0
+#define TP_STATUS_SEND_REQUEST	0x1
+#define TP_STATUS_SENDING	0x2
+#define TP_STATUS_WRONG_FORMAT	0x4
+
+/* Rx ring - feature request bits */
+#define TP_FT_REQ_FILL_RXHASH	0x1
+
+struct tpacket_hdr {
+	unsigned long	tp_status;
+	unsigned int	tp_len;
+	unsigned int	tp_snaplen;
+	unsigned short	tp_mac;
+	unsigned short	tp_net;
+	unsigned int	tp_sec;
+	unsigned int	tp_usec;
+};
+
+#define TPACKET_ALIGNMENT	16
+#define TPACKET_ALIGN(x)	(((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
+#define TPACKET_HDRLEN		(TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
+
+struct tpacket2_hdr {
+	__u32		tp_status;
+	__u32		tp_len;
+	__u32		tp_snaplen;
+	__u16		tp_mac;
+	__u16		tp_net;
+	__u32		tp_sec;
+	__u32		tp_nsec;
+	__u16		tp_vlan_tci;
+	__u16		tp_padding;
+};
+
+struct tpacket_hdr_variant1 {
+	__u32	tp_rxhash;
+	__u32	tp_vlan_tci;
+};
+
+struct tpacket3_hdr {
+	__u32		tp_next_offset;
+	__u32		tp_sec;
+	__u32		tp_nsec;
+	__u32		tp_snaplen;
+	__u32		tp_len;
+	__u32		tp_status;
+	__u16		tp_mac;
+	__u16		tp_net;
+	/* pkt_hdr variants */
+	union {
+		struct tpacket_hdr_variant1 hv1;
+	};
+};
+
+struct tpacket_bd_ts {
+	unsigned int ts_sec;
+	union {
+		unsigned int ts_usec;
+		unsigned int ts_nsec;
+	};
+};
+
+struct tpacket_hdr_v1 {
+	__u32	block_status;
+	__u32	num_pkts;
+	__u32	offset_to_first_pkt;
+
+	/* Number of valid bytes (including padding)
+	 * blk_len <= tp_block_size
+	 */
+	__u32	blk_len;
+
+	/*
+	 * Quite a few uses of sequence number:
+	 * 1. Make sure cache flush etc worked.
+	 *    Well, one can argue - why not use the increasing ts below?
+	 *    But look at 2. below first.
+	 * 2. When you pass around blocks to other user space decoders,
+	 *    you can see which blk[s] is[are] outstanding etc.
+	 * 3. Validate kernel code.
+	 */
+	__aligned_u64	seq_num;
+
+	/*
+	 * ts_last_pkt:
+	 *
+	 * Case 1.	Block has 'N'(N >=1) packets and TMO'd(timed out)
+	 *		ts_last_pkt == 'time-stamp of last packet' and NOT the
+	 *		time when the timer fired and the block was closed.
+	 *		By providing the ts of the last packet we can absolutely
+	 *		guarantee that time-stamp wise, the first packet in the
+	 *		next block will never precede the last packet of the
+	 *		previous block.
+	 * Case 2.	Block has zero packets and TMO'd
+	 *		ts_last_pkt = time when the timer fired and the block
+	 *		was closed.
+	 * Case 3.	Block has 'N' packets and NO TMO.
+	 *		ts_last_pkt = time-stamp of the last pkt in the block.
+	 *
+	 * ts_first_pkt:
+	 *		Is always the time-stamp when the block was opened.
+	 *		Case a)	ZERO packets
+	 *			No packets to deal with but atleast you know the
+	 *			time-interval of this block.
+	 *		Case b) Non-zero packets
+	 *			Use the ts of the first packet in the block.
+	 *
+	 */
+	struct tpacket_bd_ts	ts_first_pkt, ts_last_pkt;
+};
+
+union tpacket_bd_header_u {
+	struct tpacket_hdr_v1 bh1;
+};
+
+struct tpacket_block_desc {
+	__u32 version;
+	__u32 offset_to_priv;
+	union tpacket_bd_header_u hdr;
+};
+
+#define TPACKET2_HDRLEN		(TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll))
+#define TPACKET3_HDRLEN		(TPACKET_ALIGN(sizeof(struct tpacket3_hdr)) + sizeof(struct sockaddr_ll))
+
+enum tpacket_versions {
+	TPACKET_V1,
+	TPACKET_V2,
+	TPACKET_V3
+};
+
+/*
+   Frame structure:
+
+   - Start. Frame must be aligned to TPACKET_ALIGNMENT=16
+   - struct tpacket_hdr
+   - pad to TPACKET_ALIGNMENT=16
+   - struct sockaddr_ll
+   - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
+   - Start+tp_mac: [ Optional MAC header ]
+   - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
+   - Pad to align to TPACKET_ALIGNMENT=16
+ */
+
+struct tpacket_req {
+	unsigned int	tp_block_size;	/* Minimal size of contiguous block */
+	unsigned int	tp_block_nr;	/* Number of blocks */
+	unsigned int	tp_frame_size;	/* Size of frame */
+	unsigned int	tp_frame_nr;	/* Total number of frames */
+};
+
+struct tpacket_req3 {
+	unsigned int	tp_block_size;	/* Minimal size of contiguous block */
+	unsigned int	tp_block_nr;	/* Number of blocks */
+	unsigned int	tp_frame_size;	/* Size of frame */
+	unsigned int	tp_frame_nr;	/* Total number of frames */
+	unsigned int	tp_retire_blk_tov; /* timeout in msecs */
+	unsigned int	tp_sizeof_priv; /* offset to private data area */
+	unsigned int	tp_feature_req_word;
+};
+
+union tpacket_req_u {
+	struct tpacket_req	req;
+	struct tpacket_req3	req3;
+};
+
+struct packet_mreq {
+	int		mr_ifindex;
+	unsigned short	mr_type;
+	unsigned short	mr_alen;
+	unsigned char	mr_address[8];
+};
+
+#define PACKET_MR_MULTICAST	0
+#define PACKET_MR_PROMISC	1
+#define PACKET_MR_ALLMULTI	2
+#define PACKET_MR_UNICAST	3
+
+#endif