tcp_debug.c revision 56801
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 56801 2000-01-29 11:49:07Z shin $ 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/systm.h> 55#include <sys/protosw.h> 56#include <sys/socket.h> 57 58#include <netinet/in.h> 59#include <netinet/in_systm.h> 60#include <netinet/ip.h> 61#ifdef INET6 62#include <netinet6/ip6.h> 63#endif 64#include <netinet/ip_var.h> 65#include <netinet/tcp.h> 66#include <netinet/tcp_fsm.h> 67#include <netinet/tcp_timer.h> 68#include <netinet/tcp_var.h> 69#include <netinet/tcpip.h> 70#include <netinet/tcp_debug.h> 71 72#ifdef TCPDEBUG 73static int tcpconsdebug = 0; 74#endif 75 76static struct tcp_debug tcp_debug[TCP_NDEBUG]; 77static int tcp_debx; 78 79/* 80 * Tcp debug routines 81 */ 82void 83tcp_trace(act, ostate, tp, ipgen, th, req) 84 short act, ostate; 85 struct tcpcb *tp; 86 void *ipgen; 87 struct tcphdr *th; 88 int req; 89{ 90#ifdef INET6 91 int isipv6; 92#endif /* INET6 */ 93 tcp_seq seq, ack; 94 int len, flags; 95 struct tcp_debug *td = &tcp_debug[tcp_debx++]; 96 97#ifdef INET6 98 isipv6 = (ipgen != NULL && ((struct ip *)ipgen)->ip_v == 6) ? 1 : 0; 99#endif /* INET6 */ 100 td->td_family = 101#ifdef INET6 102 (isipv6 != 0) ? AF_INET6 : 103#endif 104 AF_INET; 105 if (tcp_debx == TCP_NDEBUG) 106 tcp_debx = 0; 107 td->td_time = iptime(); 108 td->td_act = act; 109 td->td_ostate = ostate; 110 td->td_tcb = (caddr_t)tp; 111 if (tp) 112 td->td_cb = *tp; 113 else 114 bzero((caddr_t)&td->td_cb, sizeof (*tp)); 115 if (ipgen) { 116 switch (td->td_family) { 117 case AF_INET: 118 bcopy((caddr_t)ipgen, (caddr_t)&td->td_ti.ti_i, 119 sizeof(td->td_ti.ti_i)); 120 bzero((caddr_t)td->td_ip6buf, sizeof(td->td_ip6buf)); 121 break; 122#ifdef INET6 123 case AF_INET6: 124 bcopy((caddr_t)ipgen, (caddr_t)td->td_ip6buf, 125 sizeof(td->td_ip6buf)); 126 bzero((caddr_t)&td->td_ti.ti_i, 127 sizeof(td->td_ti.ti_i)); 128 break; 129#endif 130 default: 131 bzero((caddr_t)td->td_ip6buf, sizeof(td->td_ip6buf)); 132 bzero((caddr_t)&td->td_ti.ti_i, 133 sizeof(td->td_ti.ti_i)); 134 break; 135 } 136 } else { 137 bzero((caddr_t)&td->td_ti.ti_i, sizeof(td->td_ti.ti_i)); 138 bzero((caddr_t)td->td_ip6buf, sizeof(td->td_ip6buf)); 139 } 140 if (th) { 141 switch (td->td_family) { 142 case AF_INET: 143 td->td_ti.ti_t = *th; 144 bzero((caddr_t)&td->td_ti6.th, sizeof(td->td_ti6.th)); 145 break; 146#ifdef INET6 147 case AF_INET6: 148 td->td_ti6.th = *th; 149 bzero((caddr_t)&td->td_ti.ti_t, 150 sizeof(td->td_ti.ti_t)); 151 break; 152#endif 153 default: 154 bzero((caddr_t)&td->td_ti.ti_t, 155 sizeof(td->td_ti.ti_t)); 156 bzero((caddr_t)&td->td_ti6.th, sizeof(td->td_ti6.th)); 157 break; 158 } 159 } else { 160 bzero((caddr_t)&td->td_ti.ti_t, sizeof(td->td_ti.ti_t)); 161 bzero((caddr_t)&td->td_ti6.th, sizeof(td->td_ti6.th)); 162 } 163 td->td_req = req; 164#ifdef TCPDEBUG 165 if (tcpconsdebug == 0) 166 return; 167 if (tp) 168 printf("%p %s:", tp, tcpstates[ostate]); 169 else 170 printf("???????? "); 171 printf("%s ", tanames[act]); 172 switch (act) { 173 174 case TA_INPUT: 175 case TA_OUTPUT: 176 case TA_DROP: 177 if (ipgen == NULL || th == NULL) 178 break; 179 seq = th->th_seq; 180 ack = th->th_ack; 181 len = 182#ifdef INET6 183 isipv6 ? ((struct ip6_hdr *)ipgen)->ip6_plen : 184#endif 185 ((struct ip *)ipgen)->ip_len; 186 if (act == TA_OUTPUT) { 187 seq = ntohl(seq); 188 ack = ntohl(ack); 189 len = ntohs((u_short)len); 190 } 191 if (act == TA_OUTPUT) 192 len -= sizeof (struct tcphdr); 193 if (len) 194 printf("[%x..%x)", seq, seq+len); 195 else 196 printf("%x", seq); 197 printf("@%x, urp=%x", ack, th->th_urp); 198 flags = th->th_flags; 199 if (flags) { 200 char *cp = "<"; 201#define pf(f) { \ 202 if (th->th_flags & TH_##f) { \ 203 printf("%s%s", cp, #f); \ 204 cp = ","; \ 205 } \ 206} 207 pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG); 208 printf(">"); 209 } 210 break; 211 212 case TA_USER: 213 printf("%s", prurequests[req&0xff]); 214 if ((req & 0xff) == PRU_SLOWTIMO) 215 printf("<%s>", tcptimers[req>>8]); 216 break; 217 } 218 if (tp) 219 printf(" -> %s", tcpstates[tp->t_state]); 220 /* print out internal state of tp !?! */ 221 printf("\n"); 222 if (tp == 0) 223 return; 224 printf( 225 "\trcv_(nxt,wnd,up) (%lx,%lx,%lx) snd_(una,nxt,max) (%lx,%lx,%lx)\n", 226 (u_long)tp->rcv_nxt, tp->rcv_wnd, (u_long)tp->rcv_up, 227 (u_long)tp->snd_una, (u_long)tp->snd_nxt, (u_long)tp->snd_max); 228 printf("\tsnd_(wl1,wl2,wnd) (%lx,%lx,%lx)\n", 229 (u_long)tp->snd_wl1, (u_long)tp->snd_wl2, tp->snd_wnd); 230#endif /* TCPDEBUG */ 231} 232