1 /* $NetBSD: tcp_debug.c,v 1.32 2018/05/03 07:13:48 maxv Exp $ */
2
3 /*
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * 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. Neither the name of the project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 /*
33 * Copyright (c) 1982, 1986, 1993
34 * The Regents of the University of California. All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 3. Neither the name of the University nor the names of its contributors
45 * may be used to endorse or promote products derived from this software
46 * without specific prior written permission.
47 *
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 * SUCH DAMAGE.
59 *
60 * @(#)tcp_debug.c 8.1 (Berkeley) 6/10/93
61 */
62
63 #include <sys/cdefs.h>
64 __KERNEL_RCSID(0, "$NetBSD: tcp_debug.c,v 1.32 2018/05/03 07:13:48 maxv Exp $");
65
66 #ifdef _KERNEL_OPT
67 #include "opt_inet.h"
68 #include "opt_tcp_debug.h"
69 #endif
70
71 /* load symbolic names */
72 #define PRUREQUESTS
73 #define TCPSTATES
74 #define TCPTIMERS
75 #define TANAMES
76
77 #include <sys/param.h>
78 #include <sys/systm.h>
79 #include <sys/mbuf.h>
80 #include <sys/socket.h>
81 #include <sys/socketvar.h>
82 #include <sys/protosw.h>
83 #include <sys/errno.h>
84
85 #include <net/if.h>
86
87 #include <netinet/in.h>
88 #include <netinet/in_systm.h>
89 #include <netinet/ip.h>
90 #include <netinet/in_pcb.h>
91 #include <netinet/ip_var.h>
92
93 #ifdef INET6
94 #include <netinet/ip6.h>
95 #endif
96
97 #include <netinet/tcp.h>
98 #include <netinet/tcp_fsm.h>
99 #include <netinet/tcp_seq.h>
100 #include <netinet/tcp_timer.h>
101 #include <netinet/tcp_var.h>
102 #include <netinet/tcp_debug.h>
103
104 struct tcp_debug tcp_debug[TCP_NDEBUG];
105 int tcp_debx;
106 int tcpconsdebug = 0;
107 /*
108 * Tcp debug routines
109 */
110 void
tcp_trace(short act,short ostate,struct tcpcb * tp,struct mbuf * m,int req)111 tcp_trace(short act, short ostate, struct tcpcb *tp, struct mbuf *m, int req)
112 {
113 tcp_seq seq, ack;
114 int len, flags;
115 struct tcphdr *th;
116 struct tcp_debug *td = &tcp_debug[tcp_debx++];
117
118 if (tcp_debx == TCP_NDEBUG)
119 tcp_debx = 0;
120 td->td_time = iptime();
121 td->td_act = act;
122 td->td_ostate = ostate;
123 td->td_tcb = (void *)tp;
124 if (tp)
125 td->td_cb = *tp;
126 else
127 memset((void *)&td->td_cb, 0, sizeof (*tp));
128 td->td_family = tp->t_family;
129 memset((void *)&td->td_ti, 0, sizeof (td->td_ti));
130 #ifdef INET6
131 memset((void *)&td->td_ti6, 0, sizeof (td->td_ti6));
132 #endif
133 th = NULL;
134 if (m) {
135 struct ip *ip;
136 ip = mtod(m, struct ip *);
137 switch (ip->ip_v) {
138 case 4:
139 if (m->m_len < sizeof(td->td_ti))
140 break;
141 memcpy(&td->td_ti, mtod(m, void *), sizeof(td->td_ti));
142 th = (struct tcphdr *)((char *)&td->td_ti +
143 sizeof(struct ip));
144 break;
145 #ifdef INET6
146 case 6:
147 if (m->m_len < sizeof(td->td_ti6))
148 break;
149 memcpy(&td->td_ti6, mtod(m, void *),
150 sizeof(td->td_ti6));
151 th = (struct tcphdr *)((char *)&td->td_ti6 +
152 sizeof(struct ip6_hdr));
153 break;
154 #endif
155 }
156 }
157 td->td_req = req;
158 if (tcpconsdebug == 0)
159 return;
160 if (tp)
161 printf("%p %s:", tp, tcpstates[ostate]);
162 else
163 printf("???????? ");
164 printf("%s ", tanames[act]);
165 switch (act) {
166
167 case TA_INPUT:
168 case TA_OUTPUT:
169 case TA_DROP:
170 if (th == 0)
171 break;
172 seq = th->th_seq;
173 ack = th->th_ack;
174 len = m->m_pkthdr.len;
175 if (act == TA_OUTPUT) {
176 seq = ntohl(seq);
177 ack = ntohl(ack);
178 len = ntohs((u_int16_t)len);
179 }
180 if (act == TA_OUTPUT)
181 len -= sizeof (struct tcphdr);
182 if (len)
183 printf("[%x..%x)", seq, seq+len);
184 else
185 printf("%x", seq);
186 printf("@%x, urp=%x", ack, th->th_urp);
187 flags = th->th_flags;
188 if (flags) {
189 #ifndef lint
190 const char *cp = "<";
191 #define pf(f) { if (th->th_flags&__CONCAT(TH_,f)) { \
192 printf("%s%s", cp, "f"); cp = ","; } }
193 pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG);
194 #endif
195 printf(">");
196 }
197 break;
198
199 case TA_USER:
200 printf("%s", prurequests[req&0xff]);
201 if ((req & 0xff) == PRU_SLOWTIMO)
202 printf("<%s>", tcptimers[req>>8]);
203 break;
204 }
205 if (tp)
206 printf(" -> %s", tcpstates[tp->t_state]);
207 /* print out internal state of tp !?! */
208 printf("\n");
209 if (tp == 0)
210 return;
211 printf("\trcv_(nxt,wnd,up) (%x,%lx,%x) snd_(una,nxt,max) (%x,%x,%x)\n",
212 tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt,
213 tp->snd_max);
214 printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%lx)\n",
215 tp->snd_wl1, tp->snd_wl2, tp->snd_wnd);
216 }
217