The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netinet/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  * 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: releng/6.4/sys/netinet/tcp_debug.c 139823 2005-01-07 01:45:51Z imp $
   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 }

Cache object: aacb38dfe44b68f56ebdb87e50d80763


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