tcp_debug.c revision 38373 
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 *	@(#)tcp_debug.c	8.1 (Berkeley) 6/10/93
34 * $Id: tcp_debug.c,v 1.12 1998/01/08 23:41:53 eivind Exp $
35 */
36
37#include "opt_inet.h"
38#include "opt_tcpdebug.h"
39
40#ifndef INET
41#error The option TCPDEBUG requires option INET.
42#endif
43
44#ifdef TCPDEBUG
45/* load symbolic names */
46#define PRUREQUESTS
47#define TCPSTATES
48#define	TCPTIMERS
49#define	TANAMES
50#endif
51
52#include <sys/param.h>
53#include <sys/systm.h>
54#include <sys/protosw.h>
55
56#include <netinet/in.h>
57#include <netinet/in_systm.h>
58#include <netinet/ip_var.h>
59#include <netinet/tcp.h>
60#include <netinet/tcp_fsm.h>
61#include <netinet/tcp_timer.h>
62#include <netinet/tcp_var.h>
63#include <netinet/tcpip.h>
64#include <netinet/tcp_debug.h>
65
66#ifdef TCPDEBUG
67static int	tcpconsdebug = 0;
68#endif
69
70static struct tcp_debug tcp_debug[TCP_NDEBUG];
71static int	tcp_debx;
72
73/*
74 * Tcp debug routines
75 */
76void
77tcp_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("%p %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_short)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			char *cp = "<";
135#define pf(f) {					\
136	if (ti->ti_flags & TH_##f) {		\
137		printf("%s%s", cp, #f);		\
138		cp = ",";			\
139	}					\
140}
141			pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG);
142			printf(">");
143		}
144		break;
145
146	case TA_USER:
147		printf("%s", prurequests[req&0xff]);
148		if ((req & 0xff) == PRU_SLOWTIMO)
149			printf("<%s>", tcptimers[req>>8]);
150		break;
151	}
152	if (tp)
153		printf(" -> %s", tcpstates[tp->t_state]);
154	/* print out internal state of tp !?! */
155	printf("\n");
156	if (tp == 0)
157		return;
158	printf(
159	"\trcv_(nxt,wnd,up) (%lx,%lx,%lx) snd_(una,nxt,max) (%lx,%lx,%lx)\n",
160	    (u_long)tp->rcv_nxt, tp->rcv_wnd, (u_long)tp->rcv_up,
161	    (u_long)tp->snd_una, (u_long)tp->snd_nxt, (u_long)tp->snd_max);
162	printf("\tsnd_(wl1,wl2,wnd) (%lx,%lx,%lx)\n",
163	    (u_long)tp->snd_wl1, (u_long)tp->snd_wl2, tp->snd_wnd);
164#endif /* TCPDEBUG */
165}
166