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