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 1.6 2006/12/22 23:57:52 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 <net/netmsg.h> 60 61 #include <netinet/in.h> 62 #include <netinet/in_systm.h> 63 #include <netinet/ip.h> 64 #ifdef INET6 65 #include <netinet/ip6.h> 66 #endif 67 #include <netinet/ip_var.h> 68 #include <netinet/tcp.h> 69 #include <netinet/tcp_fsm.h> 70 #include <netinet/tcp_timer.h> 71 #include <netinet/tcp_var.h> 72 #include <netinet/tcpip.h> 73 #include <netinet/tcp_debug.h> 74 75 #ifdef TCPDEBUG 76 static int tcpconsdebug = 0; 77 #endif 78 79 static struct tcp_debug tcp_debug[TCP_NDEBUG]; 80 static int tcp_debx; 81 82 /* 83 * Tcp debug routines 84 */ 85 void 86 tcp_trace(short act, short ostate, struct tcpcb *tp, void *ipgen, 87 struct tcphdr *th, int req) 88 { 89 #ifdef INET6 90 int isipv6; 91 #endif /* INET6 */ 92 tcp_seq seq, ack; 93 int len, flags; 94 struct tcp_debug *td = &tcp_debug[tcp_debx++]; 95 96 #ifdef INET6 97 isipv6 = (ipgen != NULL && ((struct ip *)ipgen)->ip_v == 6) ? 1 : 0; 98 #endif /* INET6 */ 99 td->td_family = 100 #ifdef INET6 101 (isipv6 != 0) ? AF_INET6 : 102 #endif 103 AF_INET; 104 if (tcp_debx == TCP_NDEBUG) 105 tcp_debx = 0; 106 td->td_time = iptime(); 107 td->td_act = act; 108 td->td_ostate = ostate; 109 td->td_tcb = (caddr_t)tp; 110 if (tp) 111 td->td_cb = *tp; 112 else 113 bzero(&td->td_cb, sizeof *tp); 114 if (ipgen) { 115 switch (td->td_family) { 116 case AF_INET: 117 bcopy(ipgen, &td->td_ti.ti_i, sizeof(td->td_ti.ti_i)); 118 bzero(td->td_ip6buf, sizeof td->td_ip6buf); 119 break; 120 #ifdef INET6 121 case AF_INET6: 122 bcopy(ipgen, td->td_ip6buf, sizeof td->td_ip6buf); 123 bzero(&td->td_ti.ti_i, sizeof td->td_ti.ti_i); 124 break; 125 #endif 126 default: 127 bzero(td->td_ip6buf, sizeof td->td_ip6buf); 128 bzero(&td->td_ti.ti_i, sizeof td->td_ti.ti_i); 129 break; 130 } 131 } else { 132 bzero(&td->td_ti.ti_i, sizeof td->td_ti.ti_i); 133 bzero(td->td_ip6buf, sizeof td->td_ip6buf); 134 } 135 if (th) { 136 switch (td->td_family) { 137 case AF_INET: 138 td->td_ti.ti_t = *th; 139 bzero(&td->td_ti6.th, sizeof td->td_ti6.th); 140 break; 141 #ifdef INET6 142 case AF_INET6: 143 td->td_ti6.th = *th; 144 bzero(&td->td_ti.ti_t, sizeof td->td_ti.ti_t); 145 break; 146 #endif 147 default: 148 bzero(&td->td_ti.ti_t, sizeof td->td_ti.ti_t); 149 bzero(&td->td_ti6.th, sizeof td->td_ti6.th); 150 break; 151 } 152 } else { 153 bzero(&td->td_ti.ti_t, sizeof td->td_ti.ti_t); 154 bzero(&td->td_ti6.th, sizeof td->td_ti6.th); 155 } 156 td->td_req = req; 157 #ifdef TCPDEBUG 158 if (tcpconsdebug == 0) 159 return; 160 if (tp) 161 kprintf("%p %s:", tp, tcpstates[ostate]); 162 else 163 kprintf("???????? "); 164 kprintf("%s ", tanames[act]); 165 switch (act) { 166 167 case TA_INPUT: 168 case TA_OUTPUT: 169 case TA_DROP: 170 if (ipgen == NULL || th == NULL) 171 break; 172 seq = th->th_seq; 173 ack = th->th_ack; 174 len = 175 #ifdef INET6 176 isipv6 ? ((struct ip6_hdr *)ipgen)->ip6_plen : 177 #endif 178 ((struct ip *)ipgen)->ip_len; 179 if (act == TA_OUTPUT) { 180 seq = ntohl(seq); 181 ack = ntohl(ack); 182 len = ntohs((u_short)len); 183 } 184 if (act == TA_OUTPUT) 185 len -= sizeof(struct tcphdr); 186 if (len) 187 kprintf("[%x..%x)", seq, seq+len); 188 else 189 kprintf("%x", seq); 190 kprintf("@%x, urp=%x", ack, th->th_urp); 191 flags = th->th_flags; 192 if (flags) { 193 char *cp = "<"; 194 #define pf(f) { \ 195 if (th->th_flags & TH_##f) { \ 196 kprintf("%s%s", cp, #f); \ 197 cp = ","; \ 198 } \ 199 } 200 pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG); 201 kprintf(">"); 202 } 203 break; 204 205 case TA_USER: 206 kprintf("%s", prurequests[req&0xff]); 207 if ((req & 0xff) == PRU_SLOWTIMO) 208 kprintf("<%s>", tcptimers[req>>8]); 209 break; 210 } 211 if (tp) 212 kprintf(" -> %s", tcpstates[tp->t_state]); 213 /* print out internal state of tp !?! */ 214 kprintf("\n"); 215 if (tp == 0) 216 return; 217 kprintf( 218 "\trcv_(nxt,wnd,up) (%lx,%lx,%lx) snd_(una,nxt,max) (%lx,%lx,%lx)\n", 219 (u_long)tp->rcv_nxt, tp->rcv_wnd, (u_long)tp->rcv_up, 220 (u_long)tp->snd_una, (u_long)tp->snd_nxt, (u_long)tp->snd_max); 221 kprintf("\tsnd_(wl1,wl2,wnd) (%lx,%lx,%lx)\n", 222 (u_long)tp->snd_wl1, (u_long)tp->snd_wl2, tp->snd_wnd); 223 #endif /* TCPDEBUG */ 224 } 225