1 /* $NetBSD: tcp_debug.c,v 1.17 2001/11/13 00:32:40 lukem Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1986, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)tcp_debug.c 8.1 (Berkeley) 6/10/93 65 */ 66 67 #include <sys/cdefs.h> 68 __KERNEL_RCSID(0, "$NetBSD: tcp_debug.c,v 1.17 2001/11/13 00:32:40 lukem Exp $"); 69 70 #include "opt_inet.h" 71 #include "opt_tcp_debug.h" 72 73 #ifdef TCP_DEBUG 74 /* load symbolic names */ 75 #define PRUREQUESTS 76 #define TCPSTATES 77 #define TCPTIMERS 78 #define TANAMES 79 80 #include <sys/param.h> 81 #include <sys/systm.h> 82 #include <sys/mbuf.h> 83 #include <sys/socket.h> 84 #include <sys/socketvar.h> 85 #include <sys/protosw.h> 86 #include <sys/errno.h> 87 88 #include <net/route.h> 89 #include <net/if.h> 90 91 #include <netinet/in.h> 92 #include <netinet/in_systm.h> 93 #include <netinet/ip.h> 94 #include <netinet/in_pcb.h> 95 #include <netinet/ip_var.h> 96 97 #ifdef INET6 98 #ifndef INET 99 #include <netinet/in.h> 100 #endif 101 #include <netinet/ip6.h> 102 #endif 103 104 #include <netinet/tcp.h> 105 #include <netinet/tcp_fsm.h> 106 #include <netinet/tcp_seq.h> 107 #include <netinet/tcp_timer.h> 108 #include <netinet/tcp_var.h> 109 #include <netinet/tcpip.h> 110 #include <netinet/tcp_debug.h> 111 112 struct tcp_debug tcp_debug[TCP_NDEBUG]; 113 int tcp_debx; 114 int tcpconsdebug = 0; 115 /* 116 * Tcp debug routines 117 */ 118 void 119 tcp_trace(act, ostate, tp, m, req) 120 short act, ostate; 121 struct tcpcb *tp; 122 struct mbuf *m; 123 int req; 124 { 125 tcp_seq seq, ack; 126 int len, flags; 127 struct tcphdr *th; 128 struct tcp_debug *td = &tcp_debug[tcp_debx++]; 129 130 if (tcp_debx == TCP_NDEBUG) 131 tcp_debx = 0; 132 td->td_time = iptime(); 133 td->td_act = act; 134 td->td_ostate = ostate; 135 td->td_tcb = (caddr_t)tp; 136 if (tp) 137 td->td_cb = *tp; 138 else 139 bzero((caddr_t)&td->td_cb, sizeof (*tp)); 140 td->td_family = tp->t_family; 141 bzero((caddr_t)&td->td_ti, sizeof (td->td_ti)); 142 #ifdef INET6 143 bzero((caddr_t)&td->td_ti6, sizeof (td->td_ti6)); 144 #endif 145 th = NULL; 146 if (m) { 147 struct ip *ip; 148 ip = mtod(m, struct ip *); 149 switch (ip->ip_v) { 150 case 4: 151 if (m->m_len < sizeof(td->td_ti)) 152 break; 153 bcopy(mtod(m, caddr_t), &td->td_ti, sizeof(td->td_ti)); 154 th = (struct tcphdr *)((caddr_t)&td->td_ti + sizeof(struct ip)); 155 break; 156 #ifdef INET6 157 case 6: 158 if (m->m_len < sizeof(td->td_ti6)) 159 break; 160 bcopy(mtod(m, caddr_t), &td->td_ti6, 161 sizeof(td->td_ti6)); 162 th = (struct tcphdr *)((caddr_t)&td->td_ti6 + sizeof(struct ip6_hdr)); 163 break; 164 #endif 165 } 166 } 167 td->td_req = req; 168 if (tcpconsdebug == 0) 169 return; 170 if (tp) 171 printf("%p %s:", tp, tcpstates[ostate]); 172 else 173 printf("???????? "); 174 printf("%s ", tanames[act]); 175 switch (act) { 176 177 case TA_INPUT: 178 case TA_OUTPUT: 179 case TA_DROP: 180 if (th == 0) 181 break; 182 seq = th->th_seq; 183 ack = th->th_ack; 184 len = m->m_pkthdr.len; 185 if (act == TA_OUTPUT) { 186 seq = ntohl(seq); 187 ack = ntohl(ack); 188 len = ntohs((u_int16_t)len); 189 } 190 if (act == TA_OUTPUT) 191 len -= sizeof (struct tcphdr); 192 if (len) 193 printf("[%x..%x)", seq, seq+len); 194 else 195 printf("%x", seq); 196 printf("@%x, urp=%x", ack, th->th_urp); 197 flags = th->th_flags; 198 if (flags) { 199 #ifndef lint 200 char *cp = "<"; 201 #define pf(f) { if (th->th_flags&__CONCAT(TH_,f)) { printf("%s%s", cp, "f"); cp = ","; } } 202 pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG); 203 #endif 204 printf(">"); 205 } 206 break; 207 208 case TA_USER: 209 printf("%s", prurequests[req&0xff]); 210 if ((req & 0xff) == PRU_SLOWTIMO) 211 printf("<%s>", tcptimers[req>>8]); 212 break; 213 } 214 if (tp) 215 printf(" -> %s", tcpstates[tp->t_state]); 216 /* print out internal state of tp !?! */ 217 printf("\n"); 218 if (tp == 0) 219 return; 220 printf("\trcv_(nxt,wnd,up) (%x,%lx,%x) snd_(una,nxt,max) (%x,%x,%x)\n", 221 tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt, 222 tp->snd_max); 223 printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%lx)\n", 224 tp->snd_wl1, tp->snd_wl2, tp->snd_wnd); 225 } 226 #endif /* TCP_DEBUG */ 227