source: rtems/cpukit/libnetworking/netinet/tcp_debug.c @ b25b88e7

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

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "opt_tcpdebug.h"

#ifdef TCPDEBUG
/* load symbolic names */
#define PRUREQUESTS
#define TCPSTATES
#define TCPTIMERS
#define TANAMES
#endif

#include <sys/param.h>
#include <rtems/bsd/sys/queue.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <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(short act, short 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 */
}