1 /* $OpenBSD: tcp_debug.c,v 1.29 2019/04/05 14:42:06 bluhm 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 87 #include <netinet/in.h> 88 #include <netinet/in_systm.h> 89 #include <netinet/ip.h> 90 #include <netinet/in_pcb.h> 91 #include <netinet/ip_var.h> 92 #include <netinet/tcp.h> 93 #include <netinet/tcp_timer.h> 94 #include <netinet/tcp_var.h> 95 #include <netinet/tcp_debug.h> 96 #include <netinet/tcp_fsm.h> 97 98 #ifdef INET6 99 #include <netinet/ip6.h> 100 #endif /* INET6 */ 101 102 #ifdef TCPDEBUG 103 int tcpconsdebug = 0; 104 #endif 105 106 struct tcp_debug tcp_debug[TCP_NDEBUG]; 107 int tcp_debx; 108 109 /* 110 * Tcp debug routines 111 */ 112 void 113 tcp_trace(short act, short ostate, struct tcpcb *tp, struct tcpcb *otp, 114 caddr_t headers, int req, int len) 115 { 116 #ifdef TCPDEBUG 117 tcp_seq seq, ack; 118 int flags; 119 #endif 120 int pf = PF_UNSPEC; 121 struct tcp_debug *td = &tcp_debug[tcp_debx++]; 122 struct tcpiphdr *ti = (struct tcpiphdr *)headers; 123 struct tcpipv6hdr *ti6 = (struct tcpipv6hdr *)headers; 124 struct tcphdr *th; 125 126 if (tcp_debx == TCP_NDEBUG) 127 tcp_debx = 0; 128 td->td_time = iptime(); 129 td->td_act = act; 130 td->td_ostate = ostate; 131 td->td_tcb = (caddr_t)otp; 132 if (tp) { 133 pf = tp->pf; 134 td->td_cb = *tp; 135 } else 136 bzero((caddr_t)&td->td_cb, sizeof (*tp)); 137 138 bzero(&td->td_ti6, sizeof(struct tcpipv6hdr)); 139 bzero(&td->td_ti, sizeof(struct tcpiphdr)); 140 if (headers) { 141 /* The address family may be in tcpcb or ip header. */ 142 if (pf == PF_UNSPEC) { 143 switch (ti6->ti6_i.ip6_vfc & IPV6_VERSION_MASK) { 144 #ifdef INET6 145 case IPV6_VERSION: 146 pf = PF_INET6; 147 break; 148 #endif /* INET6 */ 149 case IPVERSION: 150 pf = PF_INET; 151 break; 152 } 153 } 154 switch (pf) { 155 #ifdef INET6 156 case PF_INET6: 157 th = &ti6->ti6_t; 158 td->td_ti6 = *ti6; 159 td->td_ti6.ti6_plen = len; 160 break; 161 #endif /* INET6 */ 162 case PF_INET: 163 th = &ti->ti_t; 164 td->td_ti = *ti; 165 td->td_ti.ti_len = len; 166 break; 167 default: 168 headers = NULL; 169 break; 170 } 171 } 172 173 td->td_req = req; 174 #ifdef TCPDEBUG 175 if (tcpconsdebug == 0) 176 return; 177 if (otp) 178 printf("%p %s:", otp, tcpstates[ostate]); 179 else 180 printf("???????? "); 181 printf("%s ", tanames[act]); 182 switch (act) { 183 184 case TA_INPUT: 185 case TA_OUTPUT: 186 case TA_DROP: 187 if (headers == NULL) 188 break; 189 seq = th->th_seq; 190 ack = th->th_ack; 191 if (act == TA_OUTPUT) { 192 seq = ntohl(seq); 193 ack = ntohl(ack); 194 } 195 if (len) 196 printf("[%x..%x)", seq, seq+len); 197 else 198 printf("%x", seq); 199 printf("@%x, urp=%x", ack, th->th_urp); 200 flags = th->th_flags; 201 if (flags) { 202 char *cp = "<"; 203 #define pf(f) { if (th->th_flags&TH_##f) { printf("%s%s", cp, #f); cp = ","; } } 204 pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG); 205 printf(">"); 206 } 207 break; 208 209 case TA_USER: 210 printf("%s", prurequests[req]); 211 break; 212 213 case TA_TIMER: 214 printf("%s", tcptimers[req]); 215 break; 216 } 217 if (tp) 218 printf(" -> %s", tcpstates[tp->t_state]); 219 /* print out internal state of tp !?! */ 220 printf("\n"); 221 if (tp == NULL) 222 return; 223 printf("\trcv_(nxt,wnd,up) (%x,%lx,%x) snd_(una,nxt,max) (%x,%x,%x)\n", 224 tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt, 225 tp->snd_max); 226 printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%lx)\n", 227 tp->snd_wl1, tp->snd_wl2, tp->snd_wnd); 228 #endif /* TCPDEBUG */ 229 } 230