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  * 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  */
  36
  37 #include "opt_inet.h"
  38 #include "opt_inet6.h"
  39 #include "opt_tcpdebug.h"
  40
  41 #ifndef INET
  42 #error The option TCPDEBUG requires option INET.
  43 #endif
  44
  45 #ifdef TCPDEBUG
  46 /* load symbolic names */
  47 #define PRUREQUESTS
  48 #define TCPSTATES
  49 #define TCPTIMERS
  50 #define TANAMES
  51 #endif
  52
  53 #include <sys/param.h>
  54 #include <sys/systm.h>
  55 #include <sys/protosw.h>
  56 #include <sys/socket.h>
  57
  58 #include <netinet/in.h>
  59 #include <netinet/in_systm.h>
  60 #include <netinet/ip.h>
  61 #ifdef INET6
  62 #include <netinet/ip6.h>
  63 #endif
  64 #include <netinet/ip_var.h>
  65 #include <netinet/tcp.h>
  66 #include <netinet/tcp_fsm.h>
  67 #include <netinet/tcp_timer.h>
  68 #include <netinet/tcp_var.h>
  69 #include <netinet/tcpip.h>
  70 #include <netinet/tcp_debug.h>
  71
  72 #ifdef TCPDEBUG
  73 static int      tcpconsdebug = 0;
  74 #endif
  75
  76 static struct tcp_debug tcp_debug[TCP_NDEBUG];
  77 static int      tcp_debx;
  78
  79 /*
  80  * Tcp debug routines
  81  */
  82 void
  83 tcp_trace(act, ostate, tp, ipgen, th, req)
  84         short act, ostate;
  85         struct tcpcb *tp;
  86         void *ipgen;
  87         struct tcphdr *th;
  88         int req;
  89 {
  90 #ifdef INET6
  91         int isipv6;
  92 #endif /* INET6 */
  93         tcp_seq seq, ack;
  94         int len, flags;
  95         struct tcp_debug *td = &tcp_debug[tcp_debx++];
  96
  97 #ifdef INET6
  98         isipv6 = (ipgen != NULL && ((struct ip *)ipgen)->ip_v == 6) ? 1 : 0;
  99 #endif /* INET6 */
 100         td->td_family =
 101 #ifdef INET6
 102                 (isipv6 != 0) ? AF_INET6 :
 103 #endif
 104                 AF_INET;
 105         if (tcp_debx == TCP_NDEBUG)
 106                 tcp_debx = 0;
 107         td->td_time = iptime();
 108         td->td_act = act;
 109         td->td_ostate = ostate;
 110         td->td_tcb = (caddr_t)tp;
 111         if (tp)
 112                 td->td_cb = *tp;
 113         else
 114                 bzero((caddr_t)&td->td_cb, sizeof (*tp));
 115         if (ipgen) {
 116                 switch (td->td_family) {
 117                 case AF_INET:
 118                         bcopy((caddr_t)ipgen, (caddr_t)&td->td_ti.ti_i,
 119                               sizeof(td->td_ti.ti_i));
 120                         bzero((caddr_t)td->td_ip6buf, sizeof(td->td_ip6buf));
 121                         break;
 122 #ifdef INET6
 123                 case AF_INET6:
 124                         bcopy((caddr_t)ipgen, (caddr_t)td->td_ip6buf,
 125                               sizeof(td->td_ip6buf));
 126                         bzero((caddr_t)&td->td_ti.ti_i,
 127                               sizeof(td->td_ti.ti_i));
 128                         break;
 129 #endif
 130                 default:
 131                         bzero((caddr_t)td->td_ip6buf, sizeof(td->td_ip6buf));
 132                         bzero((caddr_t)&td->td_ti.ti_i,
 133                               sizeof(td->td_ti.ti_i));
 134                         break;
 135                 }
 136         } else {
 137                 bzero((caddr_t)&td->td_ti.ti_i, sizeof(td->td_ti.ti_i));
 138                 bzero((caddr_t)td->td_ip6buf, sizeof(td->td_ip6buf));
 139         }
 140         if (th) {
 141                 switch (td->td_family) {
 142                 case AF_INET:
 143                         td->td_ti.ti_t = *th;
 144                         bzero((caddr_t)&td->td_ti6.th, sizeof(td->td_ti6.th));
 145                         break;
 146 #ifdef INET6
 147                 case AF_INET6:
 148                         td->td_ti6.th = *th;
 149                         bzero((caddr_t)&td->td_ti.ti_t,
 150                               sizeof(td->td_ti.ti_t));
 151                         break;
 152 #endif
 153                 default:
 154                         bzero((caddr_t)&td->td_ti.ti_t,
 155                               sizeof(td->td_ti.ti_t));
 156                         bzero((caddr_t)&td->td_ti6.th, sizeof(td->td_ti6.th));
 157                         break;
 158                 }
 159         } else {
 160                 bzero((caddr_t)&td->td_ti.ti_t, sizeof(td->td_ti.ti_t));
 161                 bzero((caddr_t)&td->td_ti6.th, sizeof(td->td_ti6.th));
 162         }
 163         td->td_req = req;
 164 #ifdef TCPDEBUG
 165         if (tcpconsdebug == 0)
 166                 return;
 167         if (tp)
 168                 printf("%p %s:", tp, tcpstates[ostate]);
 169         else
 170                 printf("???????? ");
 171         printf("%s ", tanames[act]);
 172         switch (act) {
 173
 174         case TA_INPUT:
 175         case TA_OUTPUT:
 176         case TA_DROP:
 177                 if (ipgen == NULL || th == NULL)
 178                         break;
 179                 seq = th->th_seq;
 180                 ack = th->th_ack;
 181                 len =
 182 #ifdef INET6
 183                         isipv6 ? ((struct ip6_hdr *)ipgen)->ip6_plen :
 184 #endif
 185                         ((struct ip *)ipgen)->ip_len;
 186                 if (act == TA_OUTPUT) {
 187                         seq = ntohl(seq);
 188                         ack = ntohl(ack);
 189                         len = ntohs((u_short)len);
 190                 }
 191                 if (act == TA_OUTPUT)
 192                         len -= sizeof (struct tcphdr);
 193                 if (len)
 194                         printf("[%x..%x)", seq, seq+len);
 195                 else
 196                         printf("%x", seq);
 197                 printf("@%x, urp=%x", ack, th->th_urp);
 198                 flags = th->th_flags;
 199                 if (flags) {
 200                         char *cp = "<";
 201 #define pf(f) {                                 \
 202         if (th->th_flags & TH_##f) {            \
 203                 printf("%s%s", cp, #f);         \
 204                 cp = ",";                       \
 205         }                                       \
 206 }
 207                         pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG);
 208                         printf(">");
 209                 }
 210                 break;
 211
 212         case TA_USER:
 213                 printf("%s", prurequests[req&0xff]);
 214                 if ((req & 0xff) == PRU_SLOWTIMO)
 215                         printf("<%s>", tcptimers[req>>8]);
 216                 break;
 217         }
 218         if (tp)
 219                 printf(" -> %s", tcpstates[tp->t_state]);
 220         /* print out internal state of tp !?! */
 221         printf("\n");
 222         if (tp == 0)
 223                 return;
 224         printf(
 225         "\trcv_(nxt,wnd,up) (%lx,%lx,%lx) snd_(una,nxt,max) (%lx,%lx,%lx)\n",
 226             (u_long)tp->rcv_nxt, tp->rcv_wnd, (u_long)tp->rcv_up,
 227             (u_long)tp->snd_una, (u_long)tp->snd_nxt, (u_long)tp->snd_max);
 228         printf("\tsnd_(wl1,wl2,wnd) (%lx,%lx,%lx)\n",
 229             (u_long)tp->snd_wl1, (u_long)tp->snd_wl2, tp->snd_wnd);
 230 #endif /* TCPDEBUG */
 231 }