minix/include/net/gen/tcp_hdr.h

   1 /*
   2 server/ip/gen/tcp_hdr.h
   3 */
   4
   5 #ifndef __SERVER__IP__GEN__TCP_HDR_H__
   6 #define __SERVER__IP__GEN__TCP_HDR_H__
   7
   8 typedef struct tcp_hdr
   9 {
  10         tcpport_t th_srcport;
  11         tcpport_t th_dstport;
  12         u32_t th_seq_nr;
  13         u32_t th_ack_nr;
  14         u8_t th_data_off;
  15         u8_t th_flags;
  16         u16_t th_window;
  17         u16_t th_chksum;
  18         u16_t th_urgptr;
  19 } tcp_hdr_t;
  20
  21 #define TH_DO_MASK      0xf0
  22
  23 #define TH_FLAGS_MASK   0x3f
  24 #define THF_FIN         0x1
  25 #define THF_SYN         0x2
  26 #define THF_RST         0x4
  27 #define THF_PSH         0x8
  28 #define THF_ACK         0x10
  29 #define THF_URG         0x20
  30
  31 typedef struct tcp_hdropt
  32 {
  33         int tho_opt_siz;
  34         u8_t tho_data[TCP_MAX_HDR_SIZE-TCP_MIN_HDR_SIZE];
  35 } tcp_hdropt_t;
  36
  37 #define TCP_OPT_EOL      0
  38 #define TCP_OPT_NOP      1
  39 #define TCP_OPT_MSS      2
  40 #define TCP_OPT_WSOPT    3      /* RFC-1323, window scale option */
  41 #define TCP_OPT_SACKOK   4      /* RFC-2018, SACK permitted */
  42 #define TCP_OPT_TS       8      /* RFC-1323, Timestamps option */
  43 #define TCP_OPT_CCNEW   12      /* RFC-1644, new connection count */
  44
  45 #endif /* __SERVER__IP__GEN__TCP_HDR_H__ */
  46
  47 /*
  48  * $PchId: tcp_hdr.h,v 1.4 2002/06/10 07:12:22 philip Exp $
  49  */