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Diffstat (limited to 'cpukit/libnetworking/netinet/tcp.h')
| -rw-r--r-- | cpukit/libnetworking/netinet/tcp.h | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/cpukit/libnetworking/netinet/tcp.h b/cpukit/libnetworking/netinet/tcp.h new file mode 100644 index 0000000000..9bd4a1454c --- /dev/null +++ b/cpukit/libnetworking/netinet/tcp.h @@ -0,0 +1,140 @@ +/* + * Copyright (c) 1982, 1986, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)tcp.h 8.1 (Berkeley) 6/10/93 + * $FreeBSD: src/sys/netinet/tcp.h,v 1.30 2005/01/07 01:45:45 imp Exp $ + */ + +/* + * $Id$ + */ + +#ifndef _NETINET_TCP_H_ +#define _NETINET_TCP_H_ + +#include <rtems/bsd/sys/cdefs.h> + +#if __BSD_VISIBLE + +typedef u_int32_t tcp_seq; + +#define tcp6_seq tcp_seq /* for KAME src sync over BSD*'s */ +#define tcp6hdr tcphdr /* for KAME src sync over BSD*'s */ + +typedef u_long tcp_cc; /* connection count per rfc1644 */ + +/* + * TCP header. + * Per RFC 793, September, 1981. + */ +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 BYTE_ORDER == LITTLE_ENDIAN + u_int th_x2:4, /* (unused) */ + th_off:4; /* data offset */ +#endif +#if BYTE_ORDER == BIG_ENDIAN + u_int th_off:4, /* data offset */ + th_x2:4; /* (unused) */ +#endif + u_char th_flags; +#define TH_FIN 0x01 +#define TH_SYN 0x02 +#define TH_RST 0x04 +#define TH_PUSH 0x08 +#define TH_ACK 0x10 +#define TH_URG 0x20 +#define TH_ECE 0x40 +#define TH_CWR 0x80 +#define TH_FLAGS (TH_FIN|TH_SYN|TH_RST|TH_ACK|TH_URG|TH_ECE|TH_CWR) + + u_short th_win; /* window */ + u_short th_sum; /* checksum */ + u_short th_urp; /* urgent pointer */ +}; + +#define TCPOPT_EOL 0L +#define TCPOPT_NOP 1L +#define TCPOPT_MAXSEG 2L +#define TCPOLEN_MAXSEG 4L +#define TCPOPT_WINDOW 3L +#define TCPOLEN_WINDOW 3L +#define TCPOPT_SACK_PERMITTED 4L /* Experimental */ +#define TCPOLEN_SACK_PERMITTED 2L +#define TCPOPT_SACK 5L /* Experimental */ +#define TCPOPT_TIMESTAMP 8L +#define TCPOLEN_TIMESTAMP 10L +#define TCPOLEN_TSTAMP_APPA (uint32_t)(TCPOLEN_TIMESTAMP+2) /* appendix A */ +#define TCPOPT_TSTAMP_HDR \ + (uint32_t)(((uint32_t)TCPOPT_NOP<<24)| \ + ((uint32_t)TCPOPT_NOP<<16)| \ + ((uint32_t)TCPOPT_TIMESTAMP<<8)| \ + ((uint32_t)TCPOLEN_TIMESTAMP)) + +#define TCPOPT_CC 11 /* CC options: RFC-1644 */ +#define TCPOPT_CCNEW 12 +#define TCPOPT_CCECHO 13 +#define TCPOLEN_CC 6 +#define TCPOLEN_CC_APPA (TCPOLEN_CC+2) +#define TCPOPT_CC_HDR(ccopt) \ + (TCPOPT_NOP<<24|TCPOPT_NOP<<16|(ccopt)<<8|TCPOLEN_CC) + +/* + * Default maximum segment size for TCP. + * With an IP MTU of 576, this is 536, + * but 512 is probably more convenient. + * This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)). + */ +#define TCP_MSS 512 + +#define TCP_MAXWIN 65535 /* largest value for (unscaled) window */ +#define TTCP_CLIENT_SND_WND 4096 /* dflt send window for T/TCP client */ + +#define TCP_MAX_WINSHIFT 14 /* maximum window shift */ + +#define TCP_MAXHLEN (0xf<<2) /* max length of header in bytes */ +#define TCP_MAXOLEN (TCP_MAXHLEN - sizeof(struct tcphdr)) + /* max space left for options */ +#endif /* __BSD_VISIBLE */ + +/* + * User-settable options (used with setsockopt). + */ +#define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */ +#if __BSD_VISIBLE +#define TCP_MAXSEG 0x02 /* set maximum segment size */ +#define TCP_NOPUSH 0x04 /* don't push last block of write */ +#define TCP_NOOPT 0x08 /* don't use TCP options */ +#define TCP_MD5SIG 0x10 /* use MD5 digests (RFC2385) */ +#define TCP_INFO 0x20 /* retrieve tcp_info structure */ +#endif + +#endif /* !_NETINET_TCP_H_ */ |