tcp_debug.c revision 101233
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: head/sys/netinet/tcp_debug.c 101233 2002-08-02 18:08:14Z rwatson $ 35 */ 36 37#include "opt_inet.h" 38#include "opt_inet6.h" 39#include "opt_tcpdebug.h" 40 41#ifndef INET 42#error The option TCPDEBUG requires option INET. 43#endif 44 45#ifdef TCPDEBUG 46/* load symbolic names */ 47#define PRUREQUESTS 48#define TCPSTATES 49#define TCPTIMERS 50#define TANAMES 51#endif 52 53#include <sys/param.h> 54#include <sys/mac.h> 55#include <sys/systm.h> 56#include <sys/protosw.h> 57#include <sys/socket.h> 58 59#include <netinet/in.h> 60#include <netinet/in_systm.h> 61#include <netinet/ip.h> 62#ifdef INET6 63#include <netinet/ip6.h> 64#endif 65#include <netinet/ip_var.h> 66#include <netinet/tcp.h> 67#include <netinet/tcp_fsm.h> 68#include <netinet/tcp_timer.h> 69#include <netinet/tcp_var.h> 70#include <netinet/tcpip.h> 71#include <netinet/tcp_debug.h> 72 73#ifdef TCPDEBUG 74static int tcpconsdebug = 0; 75#endif 76 77static struct tcp_debug tcp_debug[TCP_NDEBUG]; 78static int tcp_debx; 79 80/* 81 * Tcp debug routines 82 */ 83void 84tcp_trace(act, ostate, tp, ipgen, th, req) 85 short act, ostate; 86 struct tcpcb *tp; 87 void *ipgen; 88 struct tcphdr *th; 89 int req; 90{ 91#ifdef INET6 92 int isipv6; 93#endif /* INET6 */ 94 tcp_seq seq, ack; 95 int len, flags; 96 struct tcp_debug *td = &tcp_debug[tcp_debx++]; 97 98#ifdef INET6 99 isipv6 = (ipgen != NULL && ((struct ip *)ipgen)->ip_v == 6) ? 1 : 0; 100#endif /* INET6 */ 101 td->td_family = 102#ifdef INET6 103 (isipv6 != 0) ? AF_INET6 : 104#endif 105 AF_INET; 106 if (tcp_debx == TCP_NDEBUG) 107 tcp_debx = 0; 108 td->td_time = iptime(); 109 td->td_act = act; 110 td->td_ostate = ostate; 111 td->td_tcb = (caddr_t)tp; 112 if (tp) 113 td->td_cb = *tp; 114 else 115 bzero((caddr_t)&td->td_cb, sizeof (*tp)); 116 if (ipgen) { 117 switch (td->td_family) { 118 case AF_INET: 119 bcopy((caddr_t)ipgen, (caddr_t)&td->td_ti.ti_i, 120 sizeof(td->td_ti.ti_i)); 121 bzero((caddr_t)td->td_ip6buf, sizeof(td->td_ip6buf)); 122 break; 123#ifdef INET6 124 case AF_INET6: 125 bcopy((caddr_t)ipgen, (caddr_t)td->td_ip6buf, 126 sizeof(td->td_ip6buf)); 127 bzero((caddr_t)&td->td_ti.ti_i, 128 sizeof(td->td_ti.ti_i)); 129 break; 130#endif 131 default: 132 bzero((caddr_t)td->td_ip6buf, sizeof(td->td_ip6buf)); 133 bzero((caddr_t)&td->td_ti.ti_i, 134 sizeof(td->td_ti.ti_i)); 135 break; 136 } 137 } else { 138 bzero((caddr_t)&td->td_ti.ti_i, sizeof(td->td_ti.ti_i)); 139 bzero((caddr_t)td->td_ip6buf, sizeof(td->td_ip6buf)); 140 } 141 if (th) { 142 switch (td->td_family) { 143 case AF_INET: 144 td->td_ti.ti_t = *th; 145 bzero((caddr_t)&td->td_ti6.th, sizeof(td->td_ti6.th)); 146 break; 147#ifdef INET6 148 case AF_INET6: 149 td->td_ti6.th = *th; 150 bzero((caddr_t)&td->td_ti.ti_t, 151 sizeof(td->td_ti.ti_t)); 152 break; 153#endif 154 default: 155 bzero((caddr_t)&td->td_ti.ti_t, 156 sizeof(td->td_ti.ti_t)); 157 bzero((caddr_t)&td->td_ti6.th, sizeof(td->td_ti6.th)); 158 break; 159 } 160 } else { 161 bzero((caddr_t)&td->td_ti.ti_t, sizeof(td->td_ti.ti_t)); 162 bzero((caddr_t)&td->td_ti6.th, sizeof(td->td_ti6.th)); 163 } 164 td->td_req = req; 165#ifdef TCPDEBUG 166 if (tcpconsdebug == 0) 167 return; 168 if (tp) 169 printf("%p %s:", tp, tcpstates[ostate]); 170 else 171 printf("???????? "); 172 printf("%s ", tanames[act]); 173 switch (act) { 174 175 case TA_INPUT: 176 case TA_OUTPUT: 177 case TA_DROP: 178 if (ipgen == NULL || th == NULL) 179 break; 180 seq = th->th_seq; 181 ack = th->th_ack; 182 len = 183#ifdef INET6 184 isipv6 ? ((struct ip6_hdr *)ipgen)->ip6_plen : 185#endif 186 ((struct ip *)ipgen)->ip_len; 187 if (act == TA_OUTPUT) { 188 seq = ntohl(seq); 189 ack = ntohl(ack); 190 len = ntohs((u_short)len); 191 } 192 if (act == TA_OUTPUT) 193 len -= sizeof (struct tcphdr); 194 if (len) 195 printf("[%x..%x)", seq, seq+len); 196 else 197 printf("%x", seq); 198 printf("@%x, urp=%x", ack, th->th_urp); 199 flags = th->th_flags; 200 if (flags) { 201 char *cp = "<"; 202#define pf(f) { \ 203 if (th->th_flags & TH_##f) { \ 204 printf("%s%s", cp, #f); \ 205 cp = ","; \ 206 } \ 207} 208 pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG); 209 printf(">"); 210 } 211 break; 212 213 case TA_USER: 214 printf("%s", prurequests[req&0xff]); 215 if ((req & 0xff) == PRU_SLOWTIMO) 216 printf("<%s>", tcptimers[req>>8]); 217 break; 218 } 219 if (tp) 220 printf(" -> %s", tcpstates[tp->t_state]); 221 /* print out internal state of tp !?! */ 222 printf("\n"); 223 if (tp == 0) 224 return; 225 printf( 226 "\trcv_(nxt,wnd,up) (%lx,%lx,%lx) snd_(una,nxt,max) (%lx,%lx,%lx)\n", 227 (u_long)tp->rcv_nxt, tp->rcv_wnd, (u_long)tp->rcv_up, 228 (u_long)tp->snd_una, (u_long)tp->snd_nxt, (u_long)tp->snd_max); 229 printf("\tsnd_(wl1,wl2,wnd) (%lx,%lx,%lx)\n", 230 (u_long)tp->snd_wl1, (u_long)tp->snd_wl2, tp->snd_wnd); 231#endif /* TCPDEBUG */ 232} 233