1 /* $OpenBSD: tcp_debug.c,v 1.30 2022/02/22 01:15:02 guenther 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 84 #include <net/route.h> 85 86 #include <netinet/in.h> 87 #include <netinet/in_systm.h> 88 #include <netinet/ip.h> 89 #include <netinet/in_pcb.h> 90 #include <netinet/ip_var.h> 91 #include <netinet/tcp.h> 92 #include <netinet/tcp_timer.h> 93 #include <netinet/tcp_var.h> 94 #include <netinet/tcp_debug.h> 95 #include <netinet/tcp_fsm.h> 96 97 #ifdef INET6 98 #include <netinet/ip6.h> 99 #endif /* INET6 */ 100 101 #ifdef TCPDEBUG 102 int tcpconsdebug = 0; 103 #endif 104 105 struct tcp_debug tcp_debug[TCP_NDEBUG]; 106 int tcp_debx; 107 108 /* 109 * Tcp debug routines 110 */ 111 void 112 tcp_trace(short act, short ostate, struct tcpcb *tp, struct tcpcb *otp, 113 caddr_t headers, int req, int len) 114 { 115 #ifdef TCPDEBUG 116 tcp_seq seq, ack; 117 int flags; 118 #endif 119 int pf = PF_UNSPEC; 120 struct tcp_debug *td = &tcp_debug[tcp_debx++]; 121 struct tcpiphdr *ti = (struct tcpiphdr *)headers; 122 struct tcpipv6hdr *ti6 = (struct tcpipv6hdr *)headers; 123 struct tcphdr *th; 124 125 if (tcp_debx == TCP_NDEBUG) 126 tcp_debx = 0; 127 td->td_time = iptime(); 128 td->td_act = act; 129 td->td_ostate = ostate; 130 td->td_tcb = (caddr_t)otp; 131 if (tp) { 132 pf = tp->pf; 133 td->td_cb = *tp; 134 } else 135 bzero((caddr_t)&td->td_cb, sizeof (*tp)); 136 137 bzero(&td->td_ti6, sizeof(struct tcpipv6hdr)); 138 bzero(&td->td_ti, sizeof(struct tcpiphdr)); 139 if (headers) { 140 /* The address family may be in tcpcb or ip header. */ 141 if (pf == PF_UNSPEC) { 142 switch (ti6->ti6_i.ip6_vfc & IPV6_VERSION_MASK) { 143 #ifdef INET6 144 case IPV6_VERSION: 145 pf = PF_INET6; 146 break; 147 #endif /* INET6 */ 148 case IPVERSION: 149 pf = PF_INET; 150 break; 151 } 152 } 153 switch (pf) { 154 #ifdef INET6 155 case PF_INET6: 156 th = &ti6->ti6_t; 157 td->td_ti6 = *ti6; 158 td->td_ti6.ti6_plen = len; 159 break; 160 #endif /* INET6 */ 161 case PF_INET: 162 th = &ti->ti_t; 163 td->td_ti = *ti; 164 td->td_ti.ti_len = len; 165 break; 166 default: 167 headers = NULL; 168 break; 169 } 170 } 171 172 td->td_req = req; 173 #ifdef TCPDEBUG 174 if (tcpconsdebug == 0) 175 return; 176 if (otp) 177 printf("%p %s:", otp, tcpstates[ostate]); 178 else 179 printf("???????? "); 180 printf("%s ", tanames[act]); 181 switch (act) { 182 183 case TA_INPUT: 184 case TA_OUTPUT: 185 case TA_DROP: 186 if (headers == NULL) 187 break; 188 seq = th->th_seq; 189 ack = th->th_ack; 190 if (act == TA_OUTPUT) { 191 seq = ntohl(seq); 192 ack = ntohl(ack); 193 } 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) { if (th->th_flags&TH_##f) { printf("%s%s", cp, #f); cp = ","; } } 203 pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG); 204 printf(">"); 205 } 206 break; 207 208 case TA_USER: 209 printf("%s", prurequests[req]); 210 break; 211 212 case TA_TIMER: 213 printf("%s", tcptimers[req]); 214 break; 215 } 216 if (tp) 217 printf(" -> %s", tcpstates[tp->t_state]); 218 /* print out internal state of tp !?! */ 219 printf("\n"); 220 if (tp == NULL) 221 return; 222 printf("\trcv_(nxt,wnd,up) (%x,%lx,%x) snd_(una,nxt,max) (%x,%x,%x)\n", 223 tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt, 224 tp->snd_max); 225 printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%lx)\n", 226 tp->snd_wl1, tp->snd_wl2, tp->snd_wnd); 227 #endif /* TCPDEBUG */ 228 } 229