50 lines
1.0 KiB
C
50 lines
1.0 KiB
C
/*
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server/ip/gen/tcp_hdr.h
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*/
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#ifndef __SERVER__IP__GEN__TCP_HDR_H__
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#define __SERVER__IP__GEN__TCP_HDR_H__
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typedef struct tcp_hdr
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{
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tcpport_t th_srcport;
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tcpport_t th_dstport;
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u32_t th_seq_nr;
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u32_t th_ack_nr;
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u8_t th_data_off;
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u8_t th_flags;
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u16_t th_window;
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u16_t th_chksum;
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u16_t th_urgptr;
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} tcp_hdr_t;
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#define TH_DO_MASK 0xf0
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#define TH_FLAGS_MASK 0x3f
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#define THF_FIN 0x1
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#define THF_SYN 0x2
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#define THF_RST 0x4
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#define THF_PSH 0x8
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#define THF_ACK 0x10
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#define THF_URG 0x20
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typedef struct tcp_hdropt
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{
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int tho_opt_siz;
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u8_t tho_data[TCP_MAX_HDR_SIZE-TCP_MIN_HDR_SIZE];
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} tcp_hdropt_t;
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#define TCP_OPT_EOL 0
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#define TCP_OPT_NOP 1
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#define TCP_OPT_MSS 2
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#define TCP_OPT_WSOPT 3 /* RFC-1323, window scale option */
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#define TCP_OPT_SACKOK 4 /* RFC-2018, SACK permitted */
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#define TCP_OPT_TS 8 /* RFC-1323, Timestamps option */
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#define TCP_OPT_CCNEW 12 /* RFC-1644, new connection count */
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#endif /* __SERVER__IP__GEN__TCP_HDR_H__ */
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/*
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* $PchId: tcp_hdr.h,v 1.4 2002/06/10 07:12:22 philip Exp $
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*/
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