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/*

 * 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. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *      This product includes software developed by the University of

 *      California, Berkeley and its contributors.

 * 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_debug.c 8.1 (Berkeley) 6/10/93

 * $Id: tcp_debug.c,v 1.2 2001-09-27 12:01:56 chris Exp $

 */

#include "opt_tcpdebug.h"

#ifdef TCPDEBUG

/* load symbolic names */

#define PRUREQUESTS

#define TCPSTATES

#define TCPTIMERS

#define TANAMES

#endif

#include <sys/param.h>

#include <sys/queue.h>

#include <sys/systm.h>

#include <sys/mbuf.h>

#include <sys/socket.h>

#include <sys/socketvar.h>

#include <sys/protosw.h>

#include <sys/errno.h>

#include <net/route.h>

#include <net/if.h>

#include <netinet/in.h>

#include <netinet/in_systm.h>

#include <netinet/ip.h>

#include <netinet/in_pcb.h>

#include <netinet/ip_var.h>

#include <netinet/tcp.h>

#include <netinet/tcp_fsm.h>

#include <netinet/tcp_seq.h>

#include <netinet/tcp_timer.h>

#include <netinet/tcp_var.h>

#include <netinet/tcpip.h>

#include <netinet/tcp_debug.h>

#ifdef TCPDEBUG

static int      tcpconsdebug = 0; /* set to 1 to enable prints */

#endif

static struct tcp_debug tcp_debug[TCP_NDEBUG];

static int      tcp_debx;

/*

 * Tcp debug routines

 */

void

tcp_trace(act, ostate, tp, ti, req)

        short act, ostate;

        struct tcpcb *tp;

        struct tcpiphdr *ti;

        int req;

{

#ifdef TCPDEBUG

        tcp_seq seq, ack;

        int len, flags;

#endif

        struct tcp_debug *td = &tcp_debug[tcp_debx++];

        if (tcp_debx == TCP_NDEBUG)

                tcp_debx = 0;

        td->td_time = iptime();

        td->td_act = act;

        td->td_ostate = ostate;

        td->td_tcb = (caddr_t)tp;

        if (tp)

                td->td_cb = *tp;

        else

                bzero((caddr_t)&td->td_cb, sizeof (*tp));

        if (ti)

                td->td_ti = *ti;

        else

                bzero((caddr_t)&td->td_ti, sizeof (*ti));

        td->td_req = req;

#ifdef TCPDEBUG

        if (tcpconsdebug == 0)

                return;

        if (tp)

                printf("%p %s:", tp, tcpstates[ostate]);

        else

                printf("???????? ");

        printf("%s ", tanames[act]);

        switch (act) {

        case TA_INPUT:

        case TA_OUTPUT:

        case TA_DROP:

                if (ti == 0)

                        break;

                seq = ti->ti_seq;

                ack = ti->ti_ack;

                len = ti->ti_len;

                if (act == TA_OUTPUT) {

                        seq = ntohl(seq);

                        ack = ntohl(ack);

                        len = ntohs((u_short)len);

                }

                if (act == TA_OUTPUT)

                        len -= sizeof (struct tcphdr);

                if (len)

                        printf("[%x..%x)", seq, seq+len);

                else

                        printf("%x", seq);

                printf("@%x, urp=%x", ack, ti->ti_urp);

                flags = ti->ti_flags;

                if (flags) {

                        char *cp = "<";

#define pf(f) {                                 \

        if (ti->ti_flags & TH_##f) {            \

                printf("%s%s", cp, #f);         \

                cp = ",";                       \

        }                                       \

}

                        pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG);

                        printf(">");

                }

                break;

        case TA_USER:

                printf("%s", prurequests[req&0xff]);

                if ((req & 0xff) == PRU_SLOWTIMO)

                        printf("<%s>", tcptimers[req>>8]);

                break;

        }

        if (tp)

                printf(" -> %s", tcpstates[tp->t_state]);

        /* print out internal state of tp !?! */

        printf("\n");

        if (tp == 0)

                return;

        printf("\trcv_(nxt,wnd,up) (%x,%x,%x) snd_(una,nxt,max) (%x,%x,%x)\n",

            tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt,

            tp->snd_max);

        printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%x)\n",

            tp->snd_wl1, tp->snd_wl2, tp->snd_wnd);

#endif /* TCPDEBUG */

}