FreeRTOS/Common/ethernet/lwIP/netif/ppp/vjbsdhdr.h

   1 #ifndef VJBSDHDR_H
   2 #define VJBSDHDR_H
   3
   4 #include "lwip/tcp.h"
   5
   6
   7 /*
   8  * Structure of an internet header, naked of options.
   9  *
  10  * We declare ip_len and ip_off to be short, rather than u_short
  11  * pragmatically since otherwise unsigned comparisons can result
  12  * against negative integers quite easily, and fail in subtle ways.
  13  */
  14 PACK_STRUCT_BEGIN
  15 struct ip
  16 {
  17 #if defined(NO_CHAR_BITFIELDS)
  18         u_char ip_hl_v; /* bug in GCC for mips means the bitfield stuff will sometimes break - so we use a char for both and get round it with macro's instead... */
  19 #else
  20 #if BYTE_ORDER == LITTLE_ENDIAN
  21         unsigned ip_hl:4,                               /* header length */
  22                 ip_v:4;                                         /* version */
  23 #elif BYTE_ORDER == BIG_ENDIAN
  24         unsigned ip_v:4,                                        /* version */
  25                 ip_hl:4;                                        /* header length */
  26 #else
  27         COMPLAIN - NO BYTE ORDER SELECTED!
  28 #endif
  29 #endif
  30         u_char  ip_tos;                                 /* type of service */
  31         u_short ip_len;                                 /* total length */
  32         u_short ip_id;                                  /* identification */
  33         u_short ip_off;                                 /* fragment offset field */
  34 #define IP_DF 0x4000                            /* dont fragment flag */
  35 #define IP_MF 0x2000                            /* more fragments flag */
  36 #define IP_OFFMASK 0x1fff                       /* mask for fragmenting bits */
  37         u_char  ip_ttl;                                 /* time to live */
  38         u_char  ip_p;                                   /* protocol */
  39         u_short ip_sum;                                 /* checksum */
  40         struct  in_addr ip_src,ip_dst;  /* source and dest address */
  41 };
  42 PACK_STRUCT_END
  43
  44 typedef u32_t tcp_seq;
  45
  46 /*
  47  * TCP header.
  48  * Per RFC 793, September, 1981.
  49  */
  50 PACK_STRUCT_BEGIN
  51 struct tcphdr
  52 {
  53         u_short th_sport;               /* source port */
  54         u_short th_dport;               /* destination port */
  55         tcp_seq th_seq;                 /* sequence number */
  56         tcp_seq th_ack;                 /* acknowledgement number */
  57 #if defined(NO_CHAR_BITFIELDS)
  58         u_char th_x2_off;
  59 #else
  60 #if BYTE_ORDER == LITTLE_ENDIAN
  61         unsigned        th_x2:4,                /* (unused) */
  62                         th_off:4;               /* data offset */
  63 #endif
  64 #if BYTE_ORDER == BIG_ENDIAN
  65         unsigned        th_off:4,               /* data offset */
  66                         th_x2:4;                /* (unused) */
  67 #endif
  68 #endif
  69         u_char  th_flags;
  70         u_short th_win;                 /* window */
  71         u_short th_sum;                 /* checksum */
  72         u_short th_urp;                 /* urgent pointer */
  73 };
  74 PACK_STRUCT_END
  75
  76 #endif /* VJBSDHDR_H */