Annotation of sys/netinet/tcp_debug.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: tcp_debug.c,v 1.20 2004/09/24 15:02:43 markus Exp $ */
2: /* $NetBSD: tcp_debug.c,v 1.10 1996/02/13 23:43:36 christos Exp $ */
3:
4: /*
5: * Copyright (c) 1982, 1986, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the University nor the names of its contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: *
32: * @(#)COPYRIGHT 1.1 (NRL) 17 January 1995
33: *
34: * NRL grants permission for redistribution and use in source and binary
35: * forms, with or without modification, of the software and documentation
36: * created at NRL provided that the following conditions are met:
37: *
38: * 1. Redistributions of source code must retain the above copyright
39: * notice, this list of conditions and the following disclaimer.
40: * 2. Redistributions in binary form must reproduce the above copyright
41: * notice, this list of conditions and the following disclaimer in the
42: * documentation and/or other materials provided with the distribution.
43: * 3. All advertising materials mentioning features or use of this software
44: * must display the following acknowledgements:
45: * This product includes software developed by the University of
46: * California, Berkeley and its contributors.
47: * This product includes software developed at the Information
48: * Technology Division, US Naval Research Laboratory.
49: * 4. Neither the name of the NRL nor the names of its contributors
50: * may be used to endorse or promote products derived from this software
51: * without specific prior written permission.
52: *
53: * THE SOFTWARE PROVIDED BY NRL IS PROVIDED BY NRL AND CONTRIBUTORS ``AS
54: * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
55: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
56: * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NRL OR
57: * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
58: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
59: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
60: * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
61: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
62: * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
63: * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
64: *
65: * The views and conclusions contained in the software and documentation
66: * are those of the authors and should not be interpreted as representing
67: * official policies, either expressed or implied, of the US Naval
68: * Research Laboratory (NRL).
69: */
70:
71: #ifdef TCPDEBUG
72: /* load symbolic names */
73: #define PRUREQUESTS
74: #define TCPSTATES
75: #define TCPTIMERS
76: #define TANAMES
77: #endif
78:
79: #include <sys/param.h>
80: #include <sys/systm.h>
81: #include <sys/mbuf.h>
82: #include <sys/socket.h>
83: #include <sys/protosw.h>
84:
85: #include <net/route.h>
86: #include <net/if.h>
87:
88: #include <netinet/in.h>
89: #include <netinet/in_systm.h>
90: #include <netinet/ip.h>
91: #include <netinet/in_pcb.h>
92: #include <netinet/ip_var.h>
93: #include <netinet/tcp.h>
94: #include <netinet/tcp_timer.h>
95: #include <netinet/tcp_var.h>
96: #include <netinet/tcpip.h>
97: #include <netinet/tcp_debug.h>
98: #include <netinet/tcp_fsm.h>
99:
100: #ifdef INET6
101: #ifndef INET
102: #include <netinet/in.h>
103: #endif
104: #include <netinet/ip6.h>
105: #endif /* INET6 */
106:
107: #ifdef TCPDEBUG
108: int tcpconsdebug = 0;
109: #endif
110:
111: struct tcp_debug tcp_debug[TCP_NDEBUG];
112: int tcp_debx;
113:
114: /*
115: * Tcp debug routines
116: */
117: void
118: tcp_trace(short act, short ostate, struct tcpcb *tp, caddr_t headers,
119: int req, int len)
120: {
121: #ifdef TCPDEBUG
122: tcp_seq seq, ack;
123: int flags;
124: #endif
125: struct tcp_debug *td = &tcp_debug[tcp_debx++];
126: struct tcpiphdr *ti = (struct tcpiphdr *)headers;
127: struct tcphdr *th;
128: #ifdef INET6
129: struct tcpipv6hdr *ti6 = (struct tcpipv6hdr *)ti;
130: #endif
131:
132: if (tcp_debx == TCP_NDEBUG)
133: tcp_debx = 0;
134: td->td_time = iptime();
135: td->td_act = act;
136: td->td_ostate = ostate;
137: td->td_tcb = (caddr_t)tp;
138: if (tp)
139: td->td_cb = *tp;
140: else
141: bzero((caddr_t)&td->td_cb, sizeof (*tp));
142: switch (tp->pf) {
143: #ifdef INET6
144: case PF_INET6:
145: if (ti6) {
146: th = &ti6->ti6_t;
147: td->td_ti6 = *ti6;
148: td->td_ti6.ti6_plen = len;
149: } else
150: bzero(&td->td_ti6, sizeof(struct tcpipv6hdr));
151: break;
152: #endif /* INET6 */
153: case PF_INET:
154: if (ti) {
155: th = &ti->ti_t;
156: td->td_ti = *ti;
157: td->td_ti.ti_len = len;
158: } else
159: bzero(&td->td_ti, sizeof(struct tcpiphdr));
160: break;
161: default:
162: return;
163: }
164:
165: td->td_req = req;
166: #ifdef TCPDEBUG
167: if (tcpconsdebug == 0)
168: return;
169: if (tp)
170: printf("%x %s:", tp, tcpstates[ostate]);
171: else
172: printf("???????? ");
173: printf("%s ", tanames[act]);
174: switch (act) {
175:
176: case TA_INPUT:
177: case TA_OUTPUT:
178: case TA_DROP:
179: if (ti == 0)
180: break;
181: seq = th->th_seq;
182: ack = th->th_ack;
183: if (act == TA_OUTPUT) {
184: seq = ntohl(seq);
185: ack = ntohl(ack);
186: }
187: if (len)
188: printf("[%x..%x)", seq, seq+len);
189: else
190: printf("%x", seq);
191: printf("@%x, urp=%x", ack, th->th_urp);
192: flags = th->th_flags;
193: if (flags) {
194: #ifndef lint
195: char *cp = "<";
196: #define pf(f) { if (th->th_flags&TH_##f) { printf("%s%s", cp, "f"); cp = ","; } }
197: pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG);
198: #endif
199: printf(">");
200: }
201: break;
202:
203: case TA_USER:
204: printf("%s", prurequests[req&0xff]);
205: if ((req & 0xff) == PRU_SLOWTIMO)
206: printf("<%s>", tcptimers[req>>8]);
207: break;
208: }
209: if (tp)
210: printf(" -> %s", tcpstates[tp->t_state]);
211: /* print out internal state of tp !?! */
212: printf("\n");
213: if (tp == 0)
214: return;
215: printf("\trcv_(nxt,wnd,up) (%x,%x,%x) snd_(una,nxt,max) (%x,%x,%x)\n",
216: tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt,
217: tp->snd_max);
218: printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%x)\n",
219: tp->snd_wl1, tp->snd_wl2, tp->snd_wnd);
220: #endif /* TCPDEBUG */
221: }
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