84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
/*
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* Copyright 2006-2012 Haiku, Inc. All Rights Reserved.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef NETINET_TCP_H
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#define NETINET_TCP_H
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#include <endian.h>
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#include <stdint.h>
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struct tcphdr {
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uint16_t th_sport; /* source port */
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uint16_t th_dport; /* destination port */
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uint32_t th_seq;
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uint32_t th_ack;
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#if BIG_ENDIAN
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uint8_t th_off : 4; /* data offset */
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uint8_t th_x2 : 4; /* unused */
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#else
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uint8_t th_x2 : 4;
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uint8_t th_off : 4;
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#endif
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uint8_t th_flags;
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uint16_t th_win;
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uint16_t th_sum;
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uint16_t th_urp; /* end of urgent data offset */
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} _PACKED;
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#if 0
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#define TH_FIN 0x01
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#define TH_SYN 0x02
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#define TH_RST 0x04
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#define TH_PUSH 0x08
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#define TH_ACK 0x10
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#define TH_URG 0x20
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#define TH_ECE 0x40
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#define TH_CWR 0x80
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#define TCPOPT_EOL 0
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#define TCPOPT_NOP 1
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#define TCPOPT_MAXSEG 2
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#define TCPOPT_WINDOW 3
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#define TCPOPT_SACK_PERMITTED 4
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#define TCPOPT_SACK 5
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#define TCPOPT_TIMESTAMP 8
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#define TCPOPT_SIGNATURE 19
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#define MAX_TCPOPTLEN 40
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/* absolute maximum TCP options length */
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#define TCPOLEN_MAXSEG 4
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#define TCPOLEN_WINDOW 3
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#define TCPOLEN_SACK 8
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#define TCPOLEN_SACK_PERMITTED 2
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#define TCPOLEN_TIMESTAMP 10
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#define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP + 2)
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/* see RFC 1323, appendix A */
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#define TCPOLEN_SIGNATURE 18
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#define TCPOPT_TSTAMP_HDR \
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(TCPOPT_NOP << 24 | TCPOPT_NOP << 16 | TCPOPT_TIMESTAMP << 8 | TCPOLEN_TIMESTAMP)
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#define TCP_MSS 536
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#define TCP_MAXWIN 65535
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#define TCP_MAX_WINSHIFT 14
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#endif
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/* options that can be set using setsockopt() and level IPPROTO_TCP */
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#define TCP_NODELAY 0x01
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/* don't delay sending smaller packets */
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#define TCP_MAXSEG 0x02
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/* set maximum segment size */
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#define TCP_NOPUSH 0x04
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/* don't use TH_PUSH */
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#define TCP_NOOPT 0x08
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/* don't use any TCP options */
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#endif /* NETINET_TCP_H */
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