LCOM1920-T02G10

/*

server/ip/gen/tcp_hdr.h

*/

#ifndef __SERVER__IP__GEN__TCP_HDR_H__

#define __SERVER__IP__GEN__TCP_HDR_H__

typedef struct tcp_hdr

{

        tcpport_t th_srcport;

        tcpport_t th_dstport;

        u32_t th_seq_nr;

        u32_t th_ack_nr;

        u8_t th_data_off;

        u8_t th_flags;

        u16_t th_window;

        u16_t th_chksum;

        u16_t th_urgptr;

} tcp_hdr_t;

#define TH_DO_MASK        0xf0

#define TH_FLAGS_MASK        0x3f

#define THF_FIN                0x1

#define THF_SYN                0x2

#define THF_RST                0x4

#define THF_PSH                0x8

#define THF_ACK                0x10

#define THF_URG                0x20

typedef struct tcp_hdropt

{

        int tho_opt_siz;

        u8_t tho_data[TCP_MAX_HDR_SIZE-TCP_MIN_HDR_SIZE];

} tcp_hdropt_t;

#define TCP_OPT_EOL         0

#define TCP_OPT_NOP         1

#define TCP_OPT_MSS         2

#define TCP_OPT_WSOPT         3        /* RFC-1323, window scale option */

#define TCP_OPT_SACKOK         4        /* RFC-2018, SACK permitted */

#define TCP_OPT_TS         8        /* RFC-1323, Timestamps option */

#define TCP_OPT_CCNEW        12        /* RFC-1644, new connection count */

#endif /* __SERVER__IP__GEN__TCP_HDR_H__ */

/*

 * $PchId: tcp_hdr.h,v 1.4 2002/06/10 07:12:22 philip Exp $

 */