1 /* 2 * Copyright (c) 1982, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)tcp_debug.c 8.1 (Berkeley) 6/10/93 34 * $FreeBSD: src/sys/netinet/tcp_debug.c,v 1.16.2.1 2000/07/15 07:14:31 kris Exp $ 35 * $DragonFly: src/sys/netinet/tcp_debug.c,v 1.5 2006/01/14 11:33:50 swildner Exp $ 36 */ 37 38 #include "opt_inet.h" 39 #include "opt_inet6.h" 40 #include "opt_tcpdebug.h" 41 42 #ifndef INET 43 #error The option TCPDEBUG requires option INET. 44 #endif 45 46 #ifdef TCPDEBUG 47 /* load symbolic names */ 48 #define PRUREQUESTS 49 #define TCPSTATES 50 #define TCPTIMERS 51 #define TANAMES 52 #endif 53 54 #include <sys/param.h> 55 #include <sys/systm.h> 56 #include <sys/protosw.h> 57 #include <sys/socket.h> 58 59 #include <netinet/in.h> 60 #include <netinet/in_systm.h> 61 #include <netinet/ip.h> 62 #ifdef INET6 63 #include <netinet/ip6.h> 64 #endif 65 #include <netinet/ip_var.h> 66 #include <netinet/tcp.h> 67 #include <netinet/tcp_fsm.h> 68 #include <netinet/tcp_timer.h> 69 #include <netinet/tcp_var.h> 70 #include <netinet/tcpip.h> 71 #include <netinet/tcp_debug.h> 72 73 #ifdef TCPDEBUG 74 static int tcpconsdebug = 0; 75 #endif 76 77 static struct tcp_debug tcp_debug[TCP_NDEBUG]; 78 static int tcp_debx; 79 80 /* 81 * Tcp debug routines 82 */ 83 void 84 tcp_trace(short act, short ostate, struct tcpcb *tp, void *ipgen, 85 struct tcphdr *th, int req) 86 { 87 #ifdef INET6 88 int isipv6; 89 #endif /* INET6 */ 90 tcp_seq seq, ack; 91 int len, flags; 92 struct tcp_debug *td = &tcp_debug[tcp_debx++]; 93 94 #ifdef INET6 95 isipv6 = (ipgen != NULL && ((struct ip *)ipgen)->ip_v == 6) ? 1 : 0; 96 #endif /* INET6 */ 97 td->td_family = 98 #ifdef INET6 99 (isipv6 != 0) ? AF_INET6 : 100 #endif 101 AF_INET; 102 if (tcp_debx == TCP_NDEBUG) 103 tcp_debx = 0; 104 td->td_time = iptime(); 105 td->td_act = act; 106 td->td_ostate = ostate; 107 td->td_tcb = (caddr_t)tp; 108 if (tp) 109 td->td_cb = *tp; 110 else 111 bzero(&td->td_cb, sizeof *tp); 112 if (ipgen) { 113 switch (td->td_family) { 114 case AF_INET: 115 bcopy(ipgen, &td->td_ti.ti_i, sizeof(td->td_ti.ti_i)); 116 bzero(td->td_ip6buf, sizeof td->td_ip6buf); 117 break; 118 #ifdef INET6 119 case AF_INET6: 120 bcopy(ipgen, td->td_ip6buf, sizeof td->td_ip6buf); 121 bzero(&td->td_ti.ti_i, sizeof td->td_ti.ti_i); 122 break; 123 #endif 124 default: 125 bzero(td->td_ip6buf, sizeof td->td_ip6buf); 126 bzero(&td->td_ti.ti_i, sizeof td->td_ti.ti_i); 127 break; 128 } 129 } else { 130 bzero(&td->td_ti.ti_i, sizeof td->td_ti.ti_i); 131 bzero(td->td_ip6buf, sizeof td->td_ip6buf); 132 } 133 if (th) { 134 switch (td->td_family) { 135 case AF_INET: 136 td->td_ti.ti_t = *th; 137 bzero(&td->td_ti6.th, sizeof td->td_ti6.th); 138 break; 139 #ifdef INET6 140 case AF_INET6: 141 td->td_ti6.th = *th; 142 bzero(&td->td_ti.ti_t, sizeof td->td_ti.ti_t); 143 break; 144 #endif 145 default: 146 bzero(&td->td_ti.ti_t, sizeof td->td_ti.ti_t); 147 bzero(&td->td_ti6.th, sizeof td->td_ti6.th); 148 break; 149 } 150 } else { 151 bzero(&td->td_ti.ti_t, sizeof td->td_ti.ti_t); 152 bzero(&td->td_ti6.th, sizeof td->td_ti6.th); 153 } 154 td->td_req = req; 155 #ifdef TCPDEBUG 156 if (tcpconsdebug == 0) 157 return; 158 if (tp) 159 printf("%p %s:", tp, tcpstates[ostate]); 160 else 161 printf("???????? "); 162 printf("%s ", tanames[act]); 163 switch (act) { 164 165 case TA_INPUT: 166 case TA_OUTPUT: 167 case TA_DROP: 168 if (ipgen == NULL || th == NULL) 169 break; 170 seq = th->th_seq; 171 ack = th->th_ack; 172 len = 173 #ifdef INET6 174 isipv6 ? ((struct ip6_hdr *)ipgen)->ip6_plen : 175 #endif 176 ((struct ip *)ipgen)->ip_len; 177 if (act == TA_OUTPUT) { 178 seq = ntohl(seq); 179 ack = ntohl(ack); 180 len = ntohs((u_short)len); 181 } 182 if (act == TA_OUTPUT) 183 len -= sizeof(struct tcphdr); 184 if (len) 185 printf("[%x..%x)", seq, seq+len); 186 else 187 printf("%x", seq); 188 printf("@%x, urp=%x", ack, th->th_urp); 189 flags = th->th_flags; 190 if (flags) { 191 char *cp = "<"; 192 #define pf(f) { \ 193 if (th->th_flags & TH_##f) { \ 194 printf("%s%s", cp, #f); \ 195 cp = ","; \ 196 } \ 197 } 198 pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG); 199 printf(">"); 200 } 201 break; 202 203 case TA_USER: 204 printf("%s", prurequests[req&0xff]); 205 if ((req & 0xff) == PRU_SLOWTIMO) 206 printf("<%s>", tcptimers[req>>8]); 207 break; 208 } 209 if (tp) 210 printf(" -> %s", tcpstates[tp->t_state]); 211 /* print out internal state of tp !?! */ 212 printf("\n"); 213 if (tp == 0) 214 return; 215 printf( 216 "\trcv_(nxt,wnd,up) (%lx,%lx,%lx) snd_(una,nxt,max) (%lx,%lx,%lx)\n", 217 (u_long)tp->rcv_nxt, tp->rcv_wnd, (u_long)tp->rcv_up, 218 (u_long)tp->snd_una, (u_long)tp->snd_nxt, (u_long)tp->snd_max); 219 printf("\tsnd_(wl1,wl2,wnd) (%lx,%lx,%lx)\n", 220 (u_long)tp->snd_wl1, (u_long)tp->snd_wl2, tp->snd_wnd); 221 #endif /* TCPDEBUG */ 222 } 223