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tcp_debug.c revision 1.7 
      1 /*
      2  * Copyright (c) 1982, 1986, 1993
      3  *	The Regents of the University of California.  All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  *
     33  *	from: @(#)tcp_debug.c	8.1 (Berkeley) 6/10/93
     34  *	$Id: tcp_debug.c,v 1.7 1994/05/13 06:06:34 mycroft Exp $
     35  */
     36 
     37 #ifdef TCPDEBUG
     38 /* load symbolic names */
     39 #define	PRUREQUESTS
     40 #define	TCPSTATES
     41 #define	TCPTIMERS
     42 #define	TANAMES
     43 #endif
     44 
     45 #include <sys/param.h>
     46 #include <sys/systm.h>
     47 #include <sys/mbuf.h>
     48 #include <sys/socket.h>
     49 #include <sys/socketvar.h>
     50 #include <sys/protosw.h>
     51 #include <sys/errno.h>
     52 
     53 #include <net/route.h>
     54 #include <net/if.h>
     55 
     56 #include <netinet/in.h>
     57 #include <netinet/in_systm.h>
     58 #include <netinet/ip.h>
     59 #include <netinet/in_pcb.h>
     60 #include <netinet/ip_var.h>
     61 #include <netinet/tcp.h>
     62 #include <netinet/tcp_fsm.h>
     63 #include <netinet/tcp_seq.h>
     64 #include <netinet/tcp_timer.h>
     65 #include <netinet/tcp_var.h>
     66 #include <netinet/tcpip.h>
     67 #include <netinet/tcp_debug.h>
     68 
     69 #ifdef TCPDEBUG
     70 int	tcpconsdebug = 0;
     71 #endif
     72 /*
     73  * Tcp debug routines
     74  */
     75 void
     76 tcp_trace(act, ostate, tp, ti, req)
     77 	short act, ostate;
     78 	struct tcpcb *tp;
     79 	struct tcpiphdr *ti;
     80 	int req;
     81 {
     82 	tcp_seq seq, ack;
     83 	int len, flags;
     84 	struct tcp_debug *td = &tcp_debug[tcp_debx++];
     85 
     86 	if (tcp_debx == TCP_NDEBUG)
     87 		tcp_debx = 0;
     88 	td->td_time = iptime();
     89 	td->td_act = act;
     90 	td->td_ostate = ostate;
     91 	td->td_tcb = (caddr_t)tp;
     92 	if (tp)
     93 		td->td_cb = *tp;
     94 	else
     95 		bzero((caddr_t)&td->td_cb, sizeof (*tp));
     96 	if (ti)
     97 		td->td_ti = *ti;
     98 	else
     99 		bzero((caddr_t)&td->td_ti, sizeof (*ti));
    100 	td->td_req = req;
    101 #ifdef TCPDEBUG
    102 	if (tcpconsdebug == 0)
    103 		return;
    104 	if (tp)
    105 		printf("%x %s:", tp, tcpstates[ostate]);
    106 	else
    107 		printf("???????? ");
    108 	printf("%s ", tanames[act]);
    109 	switch (act) {
    110 
    111 	case TA_INPUT:
    112 	case TA_OUTPUT:
    113 	case TA_DROP:
    114 		if (ti == 0)
    115 			break;
    116 		seq = ti->ti_seq;
    117 		ack = ti->ti_ack;
    118 		len = ti->ti_len;
    119 		if (act == TA_OUTPUT) {
    120 			seq = ntohl(seq);
    121 			ack = ntohl(ack);
    122 			len = ntohs((u_short)len);
    123 		}
    124 		if (act == TA_OUTPUT)
    125 			len -= sizeof (struct tcphdr);
    126 		if (len)
    127 			printf("[%x..%x)", seq, seq+len);
    128 		else
    129 			printf("%x", seq);
    130 		printf("@%x, urp=%x", ack, ti->ti_urp);
    131 		flags = ti->ti_flags;
    132 		if (flags) {
    133 #ifndef lint
    134 			char *cp = "<";
    135 #define pf(f) { if (ti->ti_flags&TH_/**/f) { printf("%s%s", cp, "f"); cp = ","; } }
    136 			pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG);
    137 #endif
    138 			printf(">");
    139 		}
    140 		break;
    141 
    142 	case TA_USER:
    143 		printf("%s", prurequests[req&0xff]);
    144 		if ((req & 0xff) == PRU_SLOWTIMO)
    145 			printf("<%s>", tcptimers[req>>8]);
    146 		break;
    147 	}
    148 	if (tp)
    149 		printf(" -> %s", tcpstates[tp->t_state]);
    150 	/* print out internal state of tp !?! */
    151 	printf("\n");
    152 	if (tp == 0)
    153 		return;
    154 	printf("\trcv_(nxt,wnd,up) (%x,%x,%x) snd_(una,nxt,max) (%x,%x,%x)\n",
    155 	    tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt,
    156 	    tp->snd_max);
    157 	printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%x)\n",
    158 	    tp->snd_wl1, tp->snd_wl2, tp->snd_wnd);
    159 #endif /* TCPDEBUG */
    160 }
    161