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 000000000000..f3799295d231
--- /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