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 * $FreeBSD$
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
67 static int tcpconsdebug = 0;
68 #endif
69
70 static struct tcp_debug tcp_debug[TCP_NDEBUG];
71 static int tcp_debx;
72
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("%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 }
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