1 /* $OpenBSD: tcp_debug.c,v 1.24 2017/05/18 11:38:07 mpi 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, caddr_t headers, 114 int req, int len) 115 { 116 #ifdef TCPDEBUG 117 tcp_seq seq, ack; 118 int flags; 119 #endif 120 struct tcp_debug *td = &tcp_debug[tcp_debx++]; 121 struct tcpiphdr *ti = (struct tcpiphdr *)headers; 122 struct tcphdr *th; 123 #ifdef INET6 124 struct tcpipv6hdr *ti6 = (struct tcpipv6hdr *)ti; 125 #endif 126 127 if (tcp_debx == TCP_NDEBUG) 128 tcp_debx = 0; 129 td->td_time = iptime(); 130 td->td_act = act; 131 td->td_ostate = ostate; 132 td->td_tcb = (caddr_t)tp; 133 if (tp) 134 td->td_cb = *tp; 135 else 136 bzero((caddr_t)&td->td_cb, sizeof (*tp)); 137 switch (tp->pf) { 138 #ifdef INET6 139 case PF_INET6: 140 if (ti6) { 141 th = &ti6->ti6_t; 142 td->td_ti6 = *ti6; 143 td->td_ti6.ti6_plen = len; 144 } else 145 bzero(&td->td_ti6, sizeof(struct tcpipv6hdr)); 146 break; 147 #endif /* INET6 */ 148 case PF_INET: 149 if (ti) { 150 th = &ti->ti_t; 151 td->td_ti = *ti; 152 td->td_ti.ti_len = len; 153 } else 154 bzero(&td->td_ti, sizeof(struct tcpiphdr)); 155 break; 156 default: 157 return; 158 } 159 160 td->td_req = req; 161 #ifdef TCPDEBUG 162 if (tcpconsdebug == 0) 163 return; 164 if (tp) 165 printf("%x %s:", tp, tcpstates[ostate]); 166 else 167 printf("???????? "); 168 printf("%s ", tanames[act]); 169 switch (act) { 170 171 case TA_INPUT: 172 case TA_OUTPUT: 173 case TA_DROP: 174 if (ti == 0) 175 break; 176 seq = th->th_seq; 177 ack = th->th_ack; 178 if (act == TA_OUTPUT) { 179 seq = ntohl(seq); 180 ack = ntohl(ack); 181 } 182 if (len) 183 printf("[%x..%x)", seq, seq+len); 184 else 185 printf("%x", seq); 186 printf("@%x, urp=%x", ack, th->th_urp); 187 flags = th->th_flags; 188 if (flags) { 189 char *cp = "<"; 190 #define pf(f) { if (th->th_flags&TH_##f) { printf("%s%s", cp, "f"); cp = ","; } } 191 pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG); 192 printf(">"); 193 } 194 break; 195 196 case TA_USER: 197 printf("%s", prurequests[req&0xff]); 198 if ((req & 0xff) == PRU_SLOWTIMO) 199 printf("<%s>", tcptimers[req>>8]); 200 break; 201 } 202 if (tp) 203 printf(" -> %s", tcpstates[tp->t_state]); 204 /* print out internal state of tp !?! */ 205 printf("\n"); 206 if (tp == 0) 207 return; 208 printf("\trcv_(nxt,wnd,up) (%x,%x,%x) snd_(una,nxt,max) (%x,%x,%x)\n", 209 tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt, 210 tp->snd_max); 211 printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%x)\n", 212 tp->snd_wl1, tp->snd_wl2, tp->snd_wnd); 213 #endif /* TCPDEBUG */ 214 } 215