diff options
Diffstat (limited to 'drivers/net/wireless/bcmdhd/include/proto/bcmtcp.h')
| -rw-r--r-- | drivers/net/wireless/bcmdhd/include/proto/bcmtcp.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/drivers/net/wireless/bcmdhd/include/proto/bcmtcp.h b/drivers/net/wireless/bcmdhd/include/proto/bcmtcp.h new file mode 100644 index 00000000..09cf2404 --- /dev/null +++ b/drivers/net/wireless/bcmdhd/include/proto/bcmtcp.h @@ -0,0 +1,72 @@ +/* + * Fundamental constants relating to TCP Protocol + * + * $Copyright Open Broadcom Corporation$ + * + * $Id: bcmtcp.h 458522 2014-02-27 02:26:15Z $ + */ + +#ifndef _bcmtcp_h_ +#define _bcmtcp_h_ + +#ifndef _TYPEDEFS_H_ +#include <typedefs.h> +#endif + +/* This marks the start of a packed structure section. */ +#include <packed_section_start.h> + + +#define TCP_SRC_PORT_OFFSET 0 /* TCP source port offset */ +#define TCP_DEST_PORT_OFFSET 2 /* TCP dest port offset */ +#define TCP_SEQ_NUM_OFFSET 4 /* TCP sequence number offset */ +#define TCP_ACK_NUM_OFFSET 8 /* TCP acknowledgement number offset */ +#define TCP_HLEN_OFFSET 12 /* HLEN and reserved bits offset */ +#define TCP_FLAGS_OFFSET 13 /* FLAGS and reserved bits offset */ +#define TCP_CHKSUM_OFFSET 16 /* TCP body checksum offset */ + +#define TCP_PORT_LEN 2 /* TCP port field length */ + +/* 8bit TCP flag field */ +#define TCP_FLAG_URG 0x20 +#define TCP_FLAG_ACK 0x10 +#define TCP_FLAG_PSH 0x08 +#define TCP_FLAG_RST 0x04 +#define TCP_FLAG_SYN 0x02 +#define TCP_FLAG_FIN 0x01 + +#define TCP_HLEN_MASK 0xf000 +#define TCP_HLEN_SHIFT 12 + +/* These fields are stored in network order */ +BWL_PRE_PACKED_STRUCT struct bcmtcp_hdr +{ + uint16 src_port; /* Source Port Address */ + uint16 dst_port; /* Destination Port Address */ + uint32 seq_num; /* TCP Sequence Number */ + uint32 ack_num; /* TCP Sequence Number */ + uint16 hdrlen_rsvd_flags; /* Header length, reserved bits and flags */ + uint16 tcpwin; /* TCP window */ + uint16 chksum; /* Segment checksum with pseudoheader */ + uint16 urg_ptr; /* Points to seq-num of byte following urg data */ +} BWL_POST_PACKED_STRUCT; + +#define TCP_MIN_HEADER_LEN 20 + +#define TCP_HDRLEN_MASK 0xf0 +#define TCP_HDRLEN_SHIFT 4 +#define TCP_HDRLEN(hdrlen) (((hdrlen) & TCP_HDRLEN_MASK) >> TCP_HDRLEN_SHIFT) + +#define TCP_FLAGS_MASK 0x1f +#define TCP_FLAGS(hdrlen) ((hdrlen) & TCP_FLAGS_MASK) + +/* This marks the end of a packed structure section. */ +#include <packed_section_end.h> + +/* To address round up by 32bit. */ +#define IS_TCPSEQ_GE(a, b) ((a - b) < NBITVAL(31)) /* a >= b */ +#define IS_TCPSEQ_LE(a, b) ((b - a) < NBITVAL(31)) /* a =< b */ +#define IS_TCPSEQ_GT(a, b) !IS_TCPSEQ_LE(a, b) /* a > b */ +#define IS_TCPSEQ_LT(a, b) !IS_TCPSEQ_GE(a, b) /* a < b */ + +#endif /* #ifndef _bcmtcp_h_ */ |