6/sys/netinet/tcp_debug.c

   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  * 4. 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  * $FreeBSD$
  31  */
  32
  33 #include "opt_inet.h"
  34 #include "opt_inet6.h"
  35 #include "opt_tcpdebug.h"
  36
  37 #ifndef INET
  38 #error The option TCPDEBUG requires option INET.
  39 #endif
  40
  41 #ifdef TCPDEBUG
  42 /* load symbolic names */
  43 #define PRUREQUESTS
  44 #define TCPSTATES
  45 #define TCPTIMERS
  46 #define TANAMES
  47 #endif
  48
  49 #include <sys/param.h>
  50 #include <sys/systm.h>
  51 #include <sys/mbuf.h>
  52 #include <sys/protosw.h>
  53 #include <sys/socket.h>
  54
  55 #include <netinet/in.h>
  56 #include <netinet/in_systm.h>
  57 #include <netinet/ip.h>
  58 #ifdef INET6
  59 #include <netinet/ip6.h>
  60 #endif
  61 #include <netinet/ip_var.h>
  62 #include <netinet/tcp.h>
  63 #include <netinet/tcp_fsm.h>
  64 #include <netinet/tcp_timer.h>
  65 #include <netinet/tcp_var.h>
  66 #include <netinet/tcpip.h>
  67 #include <netinet/tcp_debug.h>
  68
  69 #ifdef TCPDEBUG
  70 static int      tcpconsdebug = 0;
  71 #endif
  72
  73 static struct tcp_debug tcp_debug[TCP_NDEBUG];
  74 static int      tcp_debx;
  75
  76 /*
  77  * Tcp debug routines
  78  */
  79 void
  80 tcp_trace(act, ostate, tp, ipgen, th, req)
  81         short act, ostate;
  82         struct tcpcb *tp;
  83         void *ipgen;
  84         struct tcphdr *th;
  85         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((caddr_t)&td->td_cb, sizeof (*tp));
 112         if (ipgen) {
 113                 switch (td->td_family) {
 114                 case AF_INET:
 115                         bcopy((caddr_t)ipgen, (caddr_t)&td->td_ti.ti_i,
 116                               sizeof(td->td_ti.ti_i));
 117                         bzero((caddr_t)td->td_ip6buf, sizeof(td->td_ip6buf));
 118                         break;
 119 #ifdef INET6
 120                 case AF_INET6:
 121                         bcopy((caddr_t)ipgen, (caddr_t)td->td_ip6buf,
 122                               sizeof(td->td_ip6buf));
 123                         bzero((caddr_t)&td->td_ti.ti_i,
 124                               sizeof(td->td_ti.ti_i));
 125                         break;
 126 #endif
 127                 default:
 128                         bzero((caddr_t)td->td_ip6buf, sizeof(td->td_ip6buf));
 129                         bzero((caddr_t)&td->td_ti.ti_i,
 130                               sizeof(td->td_ti.ti_i));
 131                         break;
 132                 }
 133         } else {
 134                 bzero((caddr_t)&td->td_ti.ti_i, sizeof(td->td_ti.ti_i));
 135                 bzero((caddr_t)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((caddr_t)&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((caddr_t)&td->td_ti.ti_t,
 147                               sizeof(td->td_ti.ti_t));
 148                         break;
 149 #endif
 150                 default:
 151                         bzero((caddr_t)&td->td_ti.ti_t,
 152                               sizeof(td->td_ti.ti_t));
 153                         bzero((caddr_t)&td->td_ti6.th, sizeof(td->td_ti6.th));
 154                         break;
 155                 }
 156         } else {
 157                 bzero((caddr_t)&td->td_ti.ti_t, sizeof(td->td_ti.ti_t));
 158                 bzero((caddr_t)&td->td_ti6.th, sizeof(td->td_ti6.th));
 159         }
 160         td->td_req = req;
 161 #ifdef TCPDEBUG
 162         if (tcpconsdebug == 0)
 163                 return;
 164         if (tp)
 165                 printf("%p %s:", tp, tcpstates[ostate]);
 166         else
 167                 printf("???????? ");
 168         printf("%s ", tanames[act]);
 169         switch (act) {
 170
 171         case TA_INPUT:
 172         case TA_OUTPUT:
 173         case TA_DROP:
 174                 if (ipgen == NULL || th == NULL)
 175                         break;
 176                 seq = th->th_seq;
 177                 ack = th->th_ack;
 178                 len =
 179 #ifdef INET6
 180                         isipv6 ? ((struct ip6_hdr *)ipgen)->ip6_plen :
 181 #endif
 182                         ((struct ip *)ipgen)->ip_len;
 183                 if (act == TA_OUTPUT) {
 184                         seq = ntohl(seq);
 185                         ack = ntohl(ack);
 186                         len = ntohs((u_short)len);
 187                 }
 188                 if (act == TA_OUTPUT)
 189                         len -= sizeof (struct tcphdr);
 190                 if (len)
 191                         printf("[%x..%x)", seq, seq+len);
 192                 else
 193                         printf("%x", seq);
 194                 printf("@%x, urp=%x", ack, th->th_urp);
 195                 flags = th->th_flags;
 196                 if (flags) {
 197                         char *cp = "<";
 198 #define pf(f) {                                 \
 199         if (th->th_flags & TH_##f) {            \
 200                 printf("%s%s", cp, #f);         \
 201                 cp = ",";                       \
 202         }                                       \
 203 }
 204                         pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG);
 205                         printf(">");
 206                 }
 207                 break;
 208
 209         case TA_USER:
 210                 printf("%s", prurequests[req&0xff]);
 211                 if ((req & 0xff) == PRU_SLOWTIMO)
 212                         printf("<%s>", tcptimers[req>>8]);
 213                 break;
 214         }
 215         if (tp)
 216                 printf(" -> %s", tcpstates[tp->t_state]);
 217         /* print out internal state of tp !?! */
 218         printf("\n");
 219         if (tp == 0)
 220                 return;
 221         printf(
 222         "\trcv_(nxt,wnd,up) (%lx,%lx,%lx) snd_(una,nxt,max) (%lx,%lx,%lx)\n",
 223             (u_long)tp->rcv_nxt, tp->rcv_wnd, (u_long)tp->rcv_up,
 224             (u_long)tp->snd_una, (u_long)tp->snd_nxt, (u_long)tp->snd_max);
 225         printf("\tsnd_(wl1,wl2,wnd) (%lx,%lx,%lx)\n",
 226             (u_long)tp->snd_wl1, (u_long)tp->snd_wl2, tp->snd_wnd);
 227 #endif /* TCPDEBUG */
 228 }