lwip/src/netif/ppp/vjbsdhdr.h

#ifndef VJBSDHDR_H
#define VJBSDHDR_H

#include "lwip/tcp.h"

/*
 * Structure of an internet header, naked of options.
 *
 * We declare ip_len and ip_off to be short, rather than u_short
 * pragmatically since otherwise unsigned comparisons can result
 * against negative integers quite easily, and fail in subtle ways.
 */
PACK_STRUCT_BEGIN
struct ip
{
#if defined(NO_CHAR_BITFIELDS)
  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... */
#else
#if BYTE_ORDER == LITTLE_ENDIAN
  unsigned ip_hl:4,              /* header length */
           ip_v :4;              /* version */
#elif BYTE_ORDER == BIG_ENDIAN
  unsigned ip_v :4,              /* version */
           ip_hl:4;              /* header length */
#else
  COMPLAIN - NO BYTE ORDER SELECTED!
#endif
#endif
  u_char  ip_tos;                /* type of service */
  u_short ip_len;                /* total length */
  u_short ip_id;                 /* identification */
  u_short ip_off;                /* fragment offset field */
#define  IP_DF 0x4000            /* dont fragment flag */
#define  IP_MF 0x2000            /* more fragments flag */
#define  IP_OFFMASK 0x1fff       /* mask for fragmenting bits */
  u_char  ip_ttl;                /* time to live */
  u_char  ip_p;                  /* protocol */
  u_short ip_sum;                /* checksum */
  struct  in_addr ip_src,ip_dst; /* source and dest address */
};
PACK_STRUCT_END

typedef u32_t tcp_seq;

/*
 * TCP header.
 * Per RFC 793, September, 1981.
 */
PACK_STRUCT_BEGIN
struct tcphdr
{
  u_short  th_sport;    /* source port */
  u_short  th_dport;    /* destination port */
  tcp_seq  th_seq;      /* sequence number */
  tcp_seq  th_ack;      /* acknowledgement number */
#if defined(NO_CHAR_BITFIELDS)
  u_char   th_x2_off;
#else
#if BYTE_ORDER == LITTLE_ENDIAN
  unsigned th_x2 :4,    /* (unused) */
           th_off:4;    /* data offset */
#endif
#if BYTE_ORDER == BIG_ENDIAN
  unsigned th_off:4,    /* data offset */
           th_x2 :4;    /* (unused) */
#endif
#endif
  u_char   th_flags;
  u_short  th_win;      /* window */
  u_short  th_sum;      /* checksum */
  u_short  th_urp;      /* urgent pointer */
};
PACK_STRUCT_END

#endif /* VJBSDHDR_H */
Commit	Line	Data
	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 */