tcp_debug.c

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

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FreeBSD/Linux Kernel Cross Reference sys/netinet/tcp_debug.c

FreeBSD/Linux Kernel Cross Reference
sys/netinet/tcp_debug.c