1/* 2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* 29 * Copyright (c) 1982, 1986, 1993 30 * The Regents of the University of California. All rights reserved. 31 * 32 * Redistribution and use in source and binary forms, with or without 33 * modification, are permitted provided that the following conditions 34 * are met: 35 * 1. Redistributions of source code must retain the above copyright 36 * notice, this list of conditions and the following disclaimer. 37 * 2. Redistributions in binary form must reproduce the above copyright 38 * notice, this list of conditions and the following disclaimer in the 39 * documentation and/or other materials provided with the distribution. 40 * 3. All advertising materials mentioning features or use of this software 41 * must display the following acknowledgement: 42 * This product includes software developed by the University of 43 * California, Berkeley and its contributors. 44 * 4. 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 * $FreeBSD: src/sys/netinet/tcp_debug.c,v 1.16.2.1 2000/07/15 07:14:31 kris Exp $ 62 */ 63 64 65#ifndef INET 66#error The option TCPDEBUG requires option INET. 67#endif 68 69#if TCPDEBUG 70/* load symbolic names */ 71#define PRUREQUESTS 72#define TCPSTATES 73#define TCPTIMERS 74#define TANAMES 75#endif 76 77#include <sys/param.h> 78#include <sys/systm.h> 79#include <sys/protosw.h> 80#include <sys/sysctl.h> 81#include <sys/socket.h> 82 83#include <netinet/in.h> 84#include <netinet/in_systm.h> 85#include <netinet/ip.h> 86#if INET6 87#include <netinet/ip6.h> 88#endif 89#include <netinet/ip_var.h> 90#include <netinet/tcp.h> 91#include <netinet/tcp_fsm.h> 92#include <netinet/tcp_timer.h> 93#include <netinet/tcp_var.h> 94#include <netinet/tcpip.h> 95#include <netinet/tcp_debug.h> 96 97#if TCPDEBUG 98__private_extern__ int tcpconsdebug = 0; 99SYSCTL_INT(_net_inet_tcp, OID_AUTO, tcpconsdebug, CTLFLAG_RW | CTLFLAG_LOCKED, 100 &tcpconsdebug, 0, "Turn tcp debugging on or off"); 101#endif 102 103static struct tcp_debug tcp_debug[TCP_NDEBUG]; 104static int tcp_debx; 105 106/* 107 * Tcp debug routines 108 */ 109void 110tcp_trace(act, ostate, tp, ipgen, th, req) 111 short act, ostate; 112 struct tcpcb *tp; 113 void *ipgen; 114 struct tcphdr *th; 115 int req; 116{ 117#if INET6 118 int isipv6; 119#endif /* INET6 */ 120 tcp_seq seq, ack; 121 int len, flags; 122 struct tcp_debug *td = &tcp_debug[tcp_debx++]; 123 124#if INET6 125 isipv6 = (ipgen != NULL && ((struct ip *)ipgen)->ip_v == 6) ? 1 : 0; 126#endif /* INET6 */ 127 td->td_family = 128#if INET6 129 (isipv6 != 0) ? AF_INET6 : 130#endif 131 AF_INET; 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 if (ipgen) { 143 switch (td->td_family) { 144 case AF_INET: 145 bcopy((caddr_t)ipgen, (caddr_t)&td->td_ti.ti_i, 146 sizeof(td->td_ti.ti_i)); 147 bzero((caddr_t)td->td_ip6buf, sizeof(td->td_ip6buf)); 148 break; 149#if INET6 150 case AF_INET6: 151 bcopy((caddr_t)ipgen, (caddr_t)td->td_ip6buf, 152 sizeof(td->td_ip6buf)); 153 bzero((caddr_t)&td->td_ti.ti_i, 154 sizeof(td->td_ti.ti_i)); 155 break; 156#endif 157 default: 158 bzero((caddr_t)td->td_ip6buf, sizeof(td->td_ip6buf)); 159 bzero((caddr_t)&td->td_ti.ti_i, 160 sizeof(td->td_ti.ti_i)); 161 break; 162 } 163 } else { 164 bzero((caddr_t)&td->td_ti.ti_i, sizeof(td->td_ti.ti_i)); 165 bzero((caddr_t)td->td_ip6buf, sizeof(td->td_ip6buf)); 166 } 167 if (th) { 168 switch (td->td_family) { 169 case AF_INET: 170 td->td_ti.ti_t = *th; 171 bzero((caddr_t)&td->td_ti6.th, sizeof(td->td_ti6.th)); 172 break; 173#if INET6 174 case AF_INET6: 175 td->td_ti6.th = *th; 176 bzero((caddr_t)&td->td_ti.ti_t, 177 sizeof(td->td_ti.ti_t)); 178 break; 179#endif 180 default: 181 bzero((caddr_t)&td->td_ti.ti_t, 182 sizeof(td->td_ti.ti_t)); 183 bzero((caddr_t)&td->td_ti6.th, sizeof(td->td_ti6.th)); 184 break; 185 } 186 } else { 187 bzero((caddr_t)&td->td_ti.ti_t, sizeof(td->td_ti.ti_t)); 188 bzero((caddr_t)&td->td_ti6.th, sizeof(td->td_ti6.th)); 189 } 190 td->td_req = req; 191#if TCPDEBUG 192 if (tcpconsdebug == 0) 193 return; 194 if (tp) 195 printf("%x %s:", tp, tcpstates[ostate]); 196 else 197 printf("???????? "); 198 printf("%s ", tanames[act]); 199 switch (act) { 200 201 case TA_INPUT: 202 case TA_OUTPUT: 203 case TA_DROP: 204 if (ipgen == NULL || th == NULL) 205 break; 206 seq = th->th_seq; 207 ack = th->th_ack; 208 len = 209#if INET6 210 isipv6 ? ((struct ip6_hdr *)ipgen)->ip6_plen : 211#endif 212 ((struct ip *)ipgen)->ip_len; 213 if (act == TA_OUTPUT) { 214 seq = ntohl(seq); 215 ack = ntohl(ack); 216 len = ntohs((u_short)len); 217 } 218 if (act == TA_OUTPUT) 219 len -= sizeof (struct tcphdr); 220 if (len) 221 printf("[%x..%x)", seq, seq+len); 222 else 223 printf("%x", seq); 224 printf("@%x, urp=%x", ack, th->th_urp); 225 flags = th->th_flags; 226 if (flags) { 227 char *cp = "<"; 228#define pf(f) { \ 229 if (th->th_flags & TH_##f) { \ 230 printf("%s%s", cp, #f); \ 231 cp = ","; \ 232 } \ 233} 234 pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG); 235 printf(">"); 236 } 237 break; 238 239 case TA_USER: 240 printf("%s", prurequests[req&0xff]); 241 if ((req & 0xff) == PRU_SLOWTIMO) 242 printf("<%s>", tcptimers[req>>8]); 243 break; 244 } 245 if (tp) 246 printf(" -> %s", tcpstates[tp->t_state]); 247 /* print out internal state of tp !?! */ 248 printf("\n"); 249 if (tp == 0) 250 return; 251 printf( 252 "\trcv_(nxt,wnd,up) (%lx,%lx,%lx) snd_(una,nxt,max) (%lx,%lx,%lx)\n", 253 (uint32_t)tp->rcv_nxt, tp->rcv_wnd, (uint32_t)tp->rcv_up, 254 (uint32_t)tp->snd_una, (uint32_t)tp->snd_nxt, (uint32_t)tp->snd_max); 255 printf("\tsnd_(wl1,wl2,wnd) (%lx,%lx,%lx)\n", 256 (uint32_t)tp->snd_wl1, (uint32_t)tp->snd_wl2, tp->snd_wnd); 257#endif /* TCPDEBUG */ 258} 259