--- /dev/null
+/*
+ * 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.
+ * 3. 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
+ * tcp.h,v 1.3 1994/08/21 05:27:34 paul Exp
+ */
+
+#ifndef _TCP_H_
+#define _TCP_H_
+
+typedef uint32_t tcp_seq;
+
+#define PR_SLOWHZ 2 /* 2 slow timeouts per second (approx) */
+#define PR_FASTHZ 5 /* 5 fast timeouts per second (not important) */
+
+#define TCP_SNDSPACE 8192
+#define TCP_RCVSPACE 8192
+
+/*
+ * TCP header.
+ * Per RFC 793, September, 1981.
+ */
+#define tcphdr slirp_tcphdr
+struct tcphdr {
+ uint16_t th_sport; /* source port */
+ uint16_t th_dport; /* destination port */
+ tcp_seq th_seq; /* sequence number */
+ tcp_seq th_ack; /* acknowledgement number */
+#ifdef HOST_WORDS_BIGENDIAN
+ uint8_t th_off:4, /* data offset */
+ th_x2:4; /* (unused) */
+#else
+ uint8_t th_x2:4, /* (unused) */
+ th_off:4; /* data offset */
+#endif
+ uint8_t th_flags;
+ uint16_t th_win; /* window */
+ uint16_t th_sum; /* checksum */
+ uint16_t th_urp; /* urgent pointer */
+};
+
+#include "tcp_var.h"
+
+#ifndef TH_FIN
+#define TH_FIN 0x01
+#define TH_SYN 0x02
+#define TH_RST 0x04
+#define TH_PUSH 0x08
+#define TH_ACK 0x10
+#define TH_URG 0x20
+#endif
+
+#ifndef TCPOPT_EOL
+#define TCPOPT_EOL 0
+#define TCPOPT_NOP 1
+#define TCPOPT_MAXSEG 2
+#define TCPOPT_WINDOW 3
+#define TCPOPT_SACK_PERMITTED 4 /* Experimental */
+#define TCPOPT_SACK 5 /* Experimental */
+#define TCPOPT_TIMESTAMP 8
+
+#define TCPOPT_TSTAMP_HDR \
+ (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
+#endif
+
+#ifndef TCPOLEN_MAXSEG
+#define TCPOLEN_MAXSEG 4
+#define TCPOLEN_WINDOW 3
+#define TCPOLEN_SACK_PERMITTED 2
+#define TCPOLEN_TIMESTAMP 10
+#define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */
+#endif
+
+/*
+ * Default maximum segment size for TCP.
+ * With an IP MSS of 576, this is 536,
+ * but 512 is probably more convenient.
+ * This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)).
+ *
+ * We make this 1460 because we only care about Ethernet in the qemu context.
+ */
+#undef TCP_MSS
+#define TCP_MSS 1460
+
+#undef TCP_MAXWIN
+#define TCP_MAXWIN 65535 /* largest value for (unscaled) window */
+
+#undef TCP_MAX_WINSHIFT
+#define TCP_MAX_WINSHIFT 14 /* maximum window shift */
+
+/*
+ * User-settable options (used with setsockopt).
+ *
+ * We don't use the system headers on unix because we have conflicting
+ * local structures. We can't avoid the system definitions on Windows,
+ * so we undefine them.
+ */
+#undef TCP_NODELAY
+#define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */
+#undef TCP_MAXSEG
+
+/*
+ * TCP FSM state definitions.
+ * Per RFC793, September, 1981.
+ */
+
+#define TCP_NSTATES 11
+
+#define TCPS_CLOSED 0 /* closed */
+#define TCPS_LISTEN 1 /* listening for connection */
+#define TCPS_SYN_SENT 2 /* active, have sent syn */
+#define TCPS_SYN_RECEIVED 3 /* have send and received syn */
+/* states < TCPS_ESTABLISHED are those where connections not established */
+#define TCPS_ESTABLISHED 4 /* established */
+#define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */
+/* states > TCPS_CLOSE_WAIT are those where user has closed */
+#define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */
+#define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */
+#define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */
+/* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
+#define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */
+#define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */
+
+#define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED)
+#define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED)
+#define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT)
+
+/*
+ * TCP sequence numbers are 32 bit integers operated
+ * on with modular arithmetic. These macros can be
+ * used to compare such integers.
+ */
+#define SEQ_LT(a,b) ((int)((a)-(b)) < 0)
+#define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0)
+#define SEQ_GT(a,b) ((int)((a)-(b)) > 0)
+#define SEQ_GEQ(a,b) ((int)((a)-(b)) >= 0)
+
+/*
+ * Macros to initialize tcp sequence numbers for
+ * send and receive from initial send and receive
+ * sequence numbers.
+ */
+#define tcp_rcvseqinit(tp) \
+ (tp)->rcv_adv = (tp)->rcv_nxt = (tp)->irs + 1
+
+#define tcp_sendseqinit(tp) \
+ (tp)->snd_una = (tp)->snd_nxt = (tp)->snd_max = (tp)->snd_up = (tp)->iss
+
+#define TCP_ISSINCR (125*1024) /* increment for tcp_iss each second */
+
+#endif
Code Review / kvmfornfv.git / blobdiff