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 } 222