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