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 1.4 2005/01/06 17:54:35 hsu 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(act, ostate, tp, ipgen, th, req) 85 short act, ostate; 86 struct tcpcb *tp; 87 void *ipgen; 88 struct tcphdr *th; 89 int req; 90 { 91 #ifdef INET6 92 int isipv6; 93 #endif /* INET6 */ 94 tcp_seq seq, ack; 95 int len, flags; 96 struct tcp_debug *td = &tcp_debug[tcp_debx++]; 97 98 #ifdef INET6 99 isipv6 = (ipgen != NULL && ((struct ip *)ipgen)->ip_v == 6) ? 1 : 0; 100 #endif /* INET6 */ 101 td->td_family = 102 #ifdef INET6 103 (isipv6 != 0) ? AF_INET6 : 104 #endif 105 AF_INET; 106 if (tcp_debx == TCP_NDEBUG) 107 tcp_debx = 0; 108 td->td_time = iptime(); 109 td->td_act = act; 110 td->td_ostate = ostate; 111 td->td_tcb = (caddr_t)tp; 112 if (tp) 113 td->td_cb = *tp; 114 else 115 bzero(&td->td_cb, sizeof *tp); 116 if (ipgen) { 117 switch (td->td_family) { 118 case AF_INET: 119 bcopy(ipgen, &td->td_ti.ti_i, sizeof(td->td_ti.ti_i)); 120 bzero(td->td_ip6buf, sizeof td->td_ip6buf); 121 break; 122 #ifdef INET6 123 case AF_INET6: 124 bcopy(ipgen, td->td_ip6buf, sizeof td->td_ip6buf); 125 bzero(&td->td_ti.ti_i, sizeof td->td_ti.ti_i); 126 break; 127 #endif 128 default: 129 bzero(td->td_ip6buf, sizeof td->td_ip6buf); 130 bzero(&td->td_ti.ti_i, sizeof td->td_ti.ti_i); 131 break; 132 } 133 } else { 134 bzero(&td->td_ti.ti_i, sizeof td->td_ti.ti_i); 135 bzero(td->td_ip6buf, sizeof td->td_ip6buf); 136 } 137 if (th) { 138 switch (td->td_family) { 139 case AF_INET: 140 td->td_ti.ti_t = *th; 141 bzero(&td->td_ti6.th, sizeof td->td_ti6.th); 142 break; 143 #ifdef INET6 144 case AF_INET6: 145 td->td_ti6.th = *th; 146 bzero(&td->td_ti.ti_t, sizeof td->td_ti.ti_t); 147 break; 148 #endif 149 default: 150 bzero(&td->td_ti.ti_t, sizeof td->td_ti.ti_t); 151 bzero(&td->td_ti6.th, sizeof td->td_ti6.th); 152 break; 153 } 154 } else { 155 bzero(&td->td_ti.ti_t, sizeof td->td_ti.ti_t); 156 bzero(&td->td_ti6.th, sizeof td->td_ti6.th); 157 } 158 td->td_req = req; 159 #ifdef TCPDEBUG 160 if (tcpconsdebug == 0) 161 return; 162 if (tp) 163 printf("%p %s:", tp, tcpstates[ostate]); 164 else 165 printf("???????? "); 166 printf("%s ", tanames[act]); 167 switch (act) { 168 169 case TA_INPUT: 170 case TA_OUTPUT: 171 case TA_DROP: 172 if (ipgen == NULL || th == NULL) 173 break; 174 seq = th->th_seq; 175 ack = th->th_ack; 176 len = 177 #ifdef INET6 178 isipv6 ? ((struct ip6_hdr *)ipgen)->ip6_plen : 179 #endif 180 ((struct ip *)ipgen)->ip_len; 181 if (act == TA_OUTPUT) { 182 seq = ntohl(seq); 183 ack = ntohl(ack); 184 len = ntohs((u_short)len); 185 } 186 if (act == TA_OUTPUT) 187 len -= sizeof(struct tcphdr); 188 if (len) 189 printf("[%x..%x)", seq, seq+len); 190 else 191 printf("%x", seq); 192 printf("@%x, urp=%x", ack, th->th_urp); 193 flags = th->th_flags; 194 if (flags) { 195 char *cp = "<"; 196 #define pf(f) { \ 197 if (th->th_flags & TH_##f) { \ 198 printf("%s%s", cp, #f); \ 199 cp = ","; \ 200 } \ 201 } 202 pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG); 203 printf(">"); 204 } 205 break; 206 207 case TA_USER: 208 printf("%s", prurequests[req&0xff]); 209 if ((req & 0xff) == PRU_SLOWTIMO) 210 printf("<%s>", tcptimers[req>>8]); 211 break; 212 } 213 if (tp) 214 printf(" -> %s", tcpstates[tp->t_state]); 215 /* print out internal state of tp !?! */ 216 printf("\n"); 217 if (tp == 0) 218 return; 219 printf( 220 "\trcv_(nxt,wnd,up) (%lx,%lx,%lx) snd_(una,nxt,max) (%lx,%lx,%lx)\n", 221 (u_long)tp->rcv_nxt, tp->rcv_wnd, (u_long)tp->rcv_up, 222 (u_long)tp->snd_una, (u_long)tp->snd_nxt, (u_long)tp->snd_max); 223 printf("\tsnd_(wl1,wl2,wnd) (%lx,%lx,%lx)\n", 224 (u_long)tp->snd_wl1, (u_long)tp->snd_wl2, tp->snd_wnd); 225 #endif /* TCPDEBUG */ 226 } 227