tcp_debug.c revision 1541 
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 */
35
36#ifdef TCPDEBUG
37/* load symbolic names */
38#define PRUREQUESTS
39#define TCPSTATES
40#define	TCPTIMERS
41#define	TANAMES
42#endif
43
44#include <sys/param.h>
45#include <sys/systm.h>
46#include <sys/mbuf.h>
47#include <sys/socket.h>
48#include <sys/socketvar.h>
49#include <sys/protosw.h>
50#include <sys/errno.h>
51
52#include <net/route.h>
53#include <net/if.h>
54
55#include <netinet/in.h>
56#include <netinet/in_systm.h>
57#include <netinet/ip.h>
58#include <netinet/in_pcb.h>
59#include <netinet/ip_var.h>
60#include <netinet/tcp.h>
61#include <netinet/tcp_fsm.h>
62#include <netinet/tcp_seq.h>
63#include <netinet/tcp_timer.h>
64#include <netinet/tcp_var.h>
65#include <netinet/tcpip.h>
66#include <netinet/tcp_debug.h>
67
68#ifdef TCPDEBUG
69int	tcpconsdebug = 0;
70#endif
71/*
72 * Tcp debug routines
73 */
74void
75tcp_trace(act, ostate, tp, ti, req)
76	short act, ostate;
77	struct tcpcb *tp;
78	struct tcpiphdr *ti;
79	int req;
80{
81	tcp_seq seq, ack;
82	int len, flags;
83	struct tcp_debug *td = &tcp_debug[tcp_debx++];
84
85	if (tcp_debx == TCP_NDEBUG)
86		tcp_debx = 0;
87	td->td_time = iptime();
88	td->td_act = act;
89	td->td_ostate = ostate;
90	td->td_tcb = (caddr_t)tp;
91	if (tp)
92		td->td_cb = *tp;
93	else
94		bzero((caddr_t)&td->td_cb, sizeof (*tp));
95	if (ti)
96		td->td_ti = *ti;
97	else
98		bzero((caddr_t)&td->td_ti, sizeof (*ti));
99	td->td_req = req;
100#ifdef TCPDEBUG
101	if (tcpconsdebug == 0)
102		return;
103	if (tp)
104		printf("%x %s:", tp, tcpstates[ostate]);
105	else
106		printf("???????? ");
107	printf("%s ", tanames[act]);
108	switch (act) {
109
110	case TA_INPUT:
111	case TA_OUTPUT:
112	case TA_DROP:
113		if (ti == 0)
114			break;
115		seq = ti->ti_seq;
116		ack = ti->ti_ack;
117		len = ti->ti_len;
118		if (act == TA_OUTPUT) {
119			seq = ntohl(seq);
120			ack = ntohl(ack);
121			len = ntohs((u_short)len);
122		}
123		if (act == TA_OUTPUT)
124			len -= sizeof (struct tcphdr);
125		if (len)
126			printf("[%x..%x)", seq, seq+len);
127		else
128			printf("%x", seq);
129		printf("@%x, urp=%x", ack, ti->ti_urp);
130		flags = ti->ti_flags;
131		if (flags) {
132#ifndef lint
133			char *cp = "<";
134#define pf(f) { if (ti->ti_flags&TH_/**/f) { printf("%s%s", cp, "f"); cp = ","; } }
135			pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG);
136#endif
137			printf(">");
138		}
139		break;
140
141	case TA_USER:
142		printf("%s", prurequests[req&0xff]);
143		if ((req & 0xff) == PRU_SLOWTIMO)
144			printf("<%s>", tcptimers[req>>8]);
145		break;
146	}
147	if (tp)
148		printf(" -> %s", tcpstates[tp->t_state]);
149	/* print out internal state of tp !?! */
150	printf("\n");
151	if (tp == 0)
152		return;
153	printf("\trcv_(nxt,wnd,up) (%x,%x,%x) snd_(una,nxt,max) (%x,%x,%x)\n",
154	    tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt,
155	    tp->snd_max);
156	printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%x)\n",
157	    tp->snd_wl1, tp->snd_wl2, tp->snd_wnd);
158#endif /* TCPDEBUG */
159}
160