1 /* $NetBSD: tcp_debug.c,v 1.25 2007/03/04 06:03:21 christos 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. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)tcp_debug.c 8.1 (Berkeley) 6/10/93 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: tcp_debug.c,v 1.25 2007/03/04 06:03:21 christos Exp $"); 65 66 #include "opt_inet.h" 67 #include "opt_tcp_debug.h" 68 69 /* load symbolic names */ 70 #define PRUREQUESTS 71 #define TCPSTATES 72 #define TCPTIMERS 73 #define TANAMES 74 75 #include <sys/param.h> 76 #include <sys/systm.h> 77 #include <sys/mbuf.h> 78 #include <sys/socket.h> 79 #include <sys/socketvar.h> 80 #include <sys/protosw.h> 81 #include <sys/errno.h> 82 83 #include <net/route.h> 84 #include <net/if.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 92 #ifdef INET6 93 #ifndef INET 94 #include <netinet/in.h> 95 #endif 96 #include <netinet/ip6.h> 97 #endif 98 99 #include <netinet/tcp.h> 100 #include <netinet/tcp_fsm.h> 101 #include <netinet/tcp_seq.h> 102 #include <netinet/tcp_timer.h> 103 #include <netinet/tcp_var.h> 104 #include <netinet/tcpip.h> 105 #include <netinet/tcp_debug.h> 106 107 struct tcp_debug tcp_debug[TCP_NDEBUG]; 108 int tcp_debx; 109 int tcpconsdebug = 0; 110 /* 111 * Tcp debug routines 112 */ 113 void 114 tcp_trace(short act, short ostate, struct tcpcb *tp, struct mbuf *m, int req) 115 { 116 tcp_seq seq, ack; 117 int len, flags; 118 struct tcphdr *th; 119 struct tcp_debug *td = &tcp_debug[tcp_debx++]; 120 121 if (tcp_debx == TCP_NDEBUG) 122 tcp_debx = 0; 123 td->td_time = iptime(); 124 td->td_act = act; 125 td->td_ostate = ostate; 126 td->td_tcb = (void *)tp; 127 if (tp) 128 td->td_cb = *tp; 129 else 130 bzero((void *)&td->td_cb, sizeof (*tp)); 131 td->td_family = tp->t_family; 132 bzero((void *)&td->td_ti, sizeof (td->td_ti)); 133 #ifdef INET6 134 bzero((void *)&td->td_ti6, sizeof (td->td_ti6)); 135 #endif 136 th = NULL; 137 if (m) { 138 struct ip *ip; 139 ip = mtod(m, struct ip *); 140 switch (ip->ip_v) { 141 case 4: 142 if (m->m_len < sizeof(td->td_ti)) 143 break; 144 bcopy(mtod(m, void *), &td->td_ti, sizeof(td->td_ti)); 145 th = (struct tcphdr *)((char *)&td->td_ti + 146 sizeof(struct ip)); 147 break; 148 #ifdef INET6 149 case 6: 150 if (m->m_len < sizeof(td->td_ti6)) 151 break; 152 bcopy(mtod(m, void *), &td->td_ti6, 153 sizeof(td->td_ti6)); 154 th = (struct tcphdr *)((char *)&td->td_ti6 + 155 sizeof(struct ip6_hdr)); 156 break; 157 #endif 158 } 159 } 160 td->td_req = req; 161 if (tcpconsdebug == 0) 162 return; 163 if (tp) 164 printf("%p %s:", tp, tcpstates[ostate]); 165 else 166 printf("???????? "); 167 printf("%s ", tanames[act]); 168 switch (act) { 169 170 case TA_INPUT: 171 case TA_OUTPUT: 172 case TA_DROP: 173 if (th == 0) 174 break; 175 seq = th->th_seq; 176 ack = th->th_ack; 177 len = m->m_pkthdr.len; 178 if (act == TA_OUTPUT) { 179 seq = ntohl(seq); 180 ack = ntohl(ack); 181 len = ntohs((u_int16_t)len); 182 } 183 if (act == TA_OUTPUT) 184 len -= sizeof (struct tcphdr); 185 if (len) 186 printf("[%x..%x)", seq, seq+len); 187 else 188 printf("%x", seq); 189 printf("@%x, urp=%x", ack, th->th_urp); 190 flags = th->th_flags; 191 if (flags) { 192 #ifndef lint 193 const char *cp = "<"; 194 #define pf(f) { if (th->th_flags&__CONCAT(TH_,f)) { \ 195 printf("%s%s", cp, "f"); cp = ","; } } 196 pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG); 197 #endif 198 printf(">"); 199 } 200 break; 201 202 case TA_USER: 203 printf("%s", prurequests[req&0xff]); 204 if ((req & 0xff) == PRU_SLOWTIMO) 205 printf("<%s>", tcptimers[req>>8]); 206 break; 207 } 208 if (tp) 209 printf(" -> %s", tcpstates[tp->t_state]); 210 /* print out internal state of tp !?! */ 211 printf("\n"); 212 if (tp == 0) 213 return; 214 printf("\trcv_(nxt,wnd,up) (%x,%lx,%x) snd_(una,nxt,max) (%x,%x,%x)\n", 215 tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt, 216 tp->snd_max); 217 printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%lx)\n", 218 tp->snd_wl1, tp->snd_wl2, tp->snd_wnd); 219 } 220