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tcp_debug.c revision 1.9 
      1 /*	$NetBSD: tcp_debug.c,v 1.9 1995/04/13 06:36:32 cgd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1982, 1986, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  *	@(#)tcp_debug.c	8.1 (Berkeley) 6/10/93
     36  */
     37 
     38 #ifdef TCPDEBUG
     39 /* load symbolic names */
     40 #define	PRUREQUESTS
     41 #define	TCPSTATES
     42 #define	TCPTIMERS
     43 #define	TANAMES
     44 #endif
     45 
     46 #include <sys/param.h>
     47 #include <sys/systm.h>
     48 #include <sys/mbuf.h>
     49 #include <sys/socket.h>
     50 #include <sys/socketvar.h>
     51 #include <sys/protosw.h>
     52 #include <sys/errno.h>
     53 
     54 #include <net/route.h>
     55 #include <net/if.h>
     56 
     57 #include <netinet/in.h>
     58 #include <netinet/in_systm.h>
     59 #include <netinet/ip.h>
     60 #include <netinet/in_pcb.h>
     61 #include <netinet/ip_var.h>
     62 #include <netinet/tcp.h>
     63 #include <netinet/tcp_fsm.h>
     64 #include <netinet/tcp_seq.h>
     65 #include <netinet/tcp_timer.h>
     66 #include <netinet/tcp_var.h>
     67 #include <netinet/tcpip.h>
     68 #include <netinet/tcp_debug.h>
     69 
     70 #ifdef TCPDEBUG
     71 int	tcpconsdebug = 0;
     72 #endif
     73 /*
     74  * Tcp debug routines
     75  */
     76 void
     77 tcp_trace(act, ostate, tp, ti, req)
     78 	short act, ostate;
     79 	struct tcpcb *tp;
     80 	struct tcpiphdr *ti;
     81 	int req;
     82 {
     83 	tcp_seq seq, ack;
     84 	int len, flags;
     85 	struct tcp_debug *td = &tcp_debug[tcp_debx++];
     86 
     87 	if (tcp_debx == TCP_NDEBUG)
     88 		tcp_debx = 0;
     89 	td->td_time = iptime();
     90 	td->td_act = act;
     91 	td->td_ostate = ostate;
     92 	td->td_tcb = (caddr_t)tp;
     93 	if (tp)
     94 		td->td_cb = *tp;
     95 	else
     96 		bzero((caddr_t)&td->td_cb, sizeof (*tp));
     97 	if (ti)
     98 		td->td_ti = *ti;
     99 	else
    100 		bzero((caddr_t)&td->td_ti, sizeof (*ti));
    101 	td->td_req = req;
    102 #ifdef TCPDEBUG
    103 	if (tcpconsdebug == 0)
    104 		return;
    105 	if (tp)
    106 		printf("%x %s:", tp, tcpstates[ostate]);
    107 	else
    108 		printf("???????? ");
    109 	printf("%s ", tanames[act]);
    110 	switch (act) {
    111 
    112 	case TA_INPUT:
    113 	case TA_OUTPUT:
    114 	case TA_DROP:
    115 		if (ti == 0)
    116 			break;
    117 		seq = ti->ti_seq;
    118 		ack = ti->ti_ack;
    119 		len = ti->ti_len;
    120 		if (act == TA_OUTPUT) {
    121 			seq = ntohl(seq);
    122 			ack = ntohl(ack);
    123 			len = ntohs((u_int16_t)len);
    124 		}
    125 		if (act == TA_OUTPUT)
    126 			len -= sizeof (struct tcphdr);
    127 		if (len)
    128 			printf("[%x..%x)", seq, seq+len);
    129 		else
    130 			printf("%x", seq);
    131 		printf("@%x, urp=%x", ack, ti->ti_urp);
    132 		flags = ti->ti_flags;
    133 		if (flags) {
    134 #ifndef lint
    135 			char *cp = "<";
    136 #define pf(f) { if (ti->ti_flags&TH_/**/f) { printf("%s%s", cp, "f"); cp = ","; } }
    137 			pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG);
    138 #endif
    139 			printf(">");
    140 		}
    141 		break;
    142 
    143 	case TA_USER:
    144 		printf("%s", prurequests[req&0xff]);
    145 		if ((req & 0xff) == PRU_SLOWTIMO)
    146 			printf("<%s>", tcptimers[req>>8]);
    147 		break;
    148 	}
    149 	if (tp)
    150 		printf(" -> %s", tcpstates[tp->t_state]);
    151 	/* print out internal state of tp !?! */
    152 	printf("\n");
    153 	if (tp == 0)
    154 		return;
    155 	printf("\trcv_(nxt,wnd,up) (%x,%x,%x) snd_(una,nxt,max) (%x,%x,%x)\n",
    156 	    tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt,
    157 	    tp->snd_max);
    158 	printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%x)\n",
    159 	    tp->snd_wl1, tp->snd_wl2, tp->snd_wnd);
    160 #endif /* TCPDEBUG */
    161 }
    162