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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [Common/] [ethernet/] [lwIP_132/] [src/] [netif/] [ppp/] [vjbsdhdr.h] - Blame information for rev 606

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Line No. Rev Author Line
1 606 jeremybenn
#ifndef VJBSDHDR_H
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#define VJBSDHDR_H
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#include "lwip/tcp.h"
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/*
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 * Structure of an internet header, naked of options.
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 *
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 * We declare ip_len and ip_off to be short, rather than u_short
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 * pragmatically since otherwise unsigned comparisons can result
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 * against negative integers quite easily, and fail in subtle ways.
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 */
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PACK_STRUCT_BEGIN
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struct ip
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{
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#if defined(NO_CHAR_BITFIELDS)
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  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... */
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#else
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#if BYTE_ORDER == LITTLE_ENDIAN
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  unsigned ip_hl:4,              /* header length */
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           ip_v :4;              /* version */
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#elif BYTE_ORDER == BIG_ENDIAN 
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  unsigned ip_v :4,              /* version */
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           ip_hl:4;              /* header length */
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#else
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  COMPLAIN - NO BYTE ORDER SELECTED!
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#endif
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#endif
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  u_char  ip_tos;                /* type of service */
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  u_short ip_len;                /* total length */
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  u_short ip_id;                 /* identification */
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  u_short ip_off;                /* fragment offset field */
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#define  IP_DF 0x4000            /* dont fragment flag */
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#define  IP_MF 0x2000            /* more fragments flag */
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#define  IP_OFFMASK 0x1fff       /* mask for fragmenting bits */
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  u_char  ip_ttl;                /* time to live */
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  u_char  ip_p;                  /* protocol */
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  u_short ip_sum;                /* checksum */
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  struct  in_addr ip_src,ip_dst; /* source and dest address */
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};
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PACK_STRUCT_END
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typedef u32_t tcp_seq;
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/*
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 * TCP header.
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 * Per RFC 793, September, 1981.
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 */
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PACK_STRUCT_BEGIN
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struct tcphdr
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{
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  u_short  th_sport;    /* source port */
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  u_short  th_dport;    /* destination port */
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  tcp_seq  th_seq;      /* sequence number */
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  tcp_seq  th_ack;      /* acknowledgement number */
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#if defined(NO_CHAR_BITFIELDS)
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  u_char   th_x2_off;
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#else
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#if BYTE_ORDER == LITTLE_ENDIAN
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  unsigned th_x2 :4,    /* (unused) */
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           th_off:4;    /* data offset */
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#endif
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#if BYTE_ORDER == BIG_ENDIAN 
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  unsigned th_off:4,    /* data offset */
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           th_x2 :4;    /* (unused) */
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#endif
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#endif
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  u_char   th_flags;
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  u_short  th_win;      /* window */
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  u_short  th_sum;      /* checksum */
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  u_short  th_urp;      /* urgent pointer */
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};
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PACK_STRUCT_END
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#endif /* VJBSDHDR_H */

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