FreeRTOS/Common/ethernet/lwIP_132/src/netif/ppp/vjbsdhdr.h

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