git.sur5r.net Git - freertos/blob - FreeRTOS/Demo/lwIP_MCF5235_GCC/lwip/src/netif/ppp/vjbsdhdr.h

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