tcp_debug.c

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    1 /*      $OpenBSD: tcp_debug.c,v 1.30 2022/02/22 01:15:02 guenther Exp $ */
    2 /*      $NetBSD: tcp_debug.c,v 1.10 1996/02/13 23:43:36 christos Exp $  */
    3 
    4 /*
    5  * Copyright (c) 1982, 1986, 1993
    6  *      The Regents of the University of California.  All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. Neither the name of the University nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  *      @(#)COPYRIGHT   1.1 (NRL) 17 January 1995
   33  *
   34  * NRL grants permission for redistribution and use in source and binary
   35  * forms, with or without modification, of the software and documentation
   36  * created at NRL provided that the following conditions are met:
   37  *
   38  * 1. Redistributions of source code must retain the above copyright
   39  *    notice, this list of conditions and the following disclaimer.
   40  * 2. Redistributions in binary form must reproduce the above copyright
   41  *    notice, this list of conditions and the following disclaimer in the
   42  *    documentation and/or other materials provided with the distribution.
   43  * 3. All advertising materials mentioning features or use of this software
   44  *    must display the following acknowledgements:
   45  *      This product includes software developed by the University of
   46  *      California, Berkeley and its contributors.
   47  *      This product includes software developed at the Information
   48  *      Technology Division, US Naval Research Laboratory.
   49  * 4. Neither the name of the NRL nor the names of its contributors
   50  *    may be used to endorse or promote products derived from this software
   51  *    without specific prior written permission.
   52  *
   53  * THE SOFTWARE PROVIDED BY NRL IS PROVIDED BY NRL AND CONTRIBUTORS ``AS
   54  * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   55  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
   56  * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL NRL OR
   57  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   58  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   59  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   60  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   61  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   62  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   63  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   64  *
   65  * The views and conclusions contained in the software and documentation
   66  * are those of the authors and should not be interpreted as representing
   67  * official policies, either expressed or implied, of the US Naval
   68  * Research Laboratory (NRL).
   69  */
   70 
   71 #ifdef TCPDEBUG
   72 /* load symbolic names */
   73 #define PRUREQUESTS
   74 #define TCPSTATES
   75 #define TCPTIMERS
   76 #define TANAMES
   77 #endif
   78 
   79 #include <sys/param.h>
   80 #include <sys/systm.h>
   81 #include <sys/mbuf.h>
   82 #include <sys/socket.h>
   83 
   84 #include <net/route.h>
   85 
   86 #include <netinet/in.h>
   87 #include <netinet/in_systm.h>
   88 #include <netinet/ip.h>
   89 #include <netinet/in_pcb.h>
   90 #include <netinet/ip_var.h>
   91 #include <netinet/tcp.h>
   92 #include <netinet/tcp_timer.h>
   93 #include <netinet/tcp_var.h>
   94 #include <netinet/tcp_debug.h>
   95 #include <netinet/tcp_fsm.h>
   96 
   97 #ifdef INET6
   98 #include <netinet/ip6.h>
   99 #endif /* INET6 */
  100 
  101 #ifdef TCPDEBUG
  102 int     tcpconsdebug = 0;
  103 #endif
  104 
  105 struct  tcp_debug tcp_debug[TCP_NDEBUG];
  106 int     tcp_debx;
  107 
  108 /*
  109  * Tcp debug routines
  110  */
  111 void
  112 tcp_trace(short act, short ostate, struct tcpcb *tp, struct tcpcb *otp,
  113     caddr_t headers, int req, int len)
  114 {
  115 #ifdef TCPDEBUG
  116         tcp_seq seq, ack;
  117         int flags;
  118 #endif
  119         int pf = PF_UNSPEC;
  120         struct tcp_debug *td = &tcp_debug[tcp_debx++];
  121         struct tcpiphdr *ti = (struct tcpiphdr *)headers;
  122         struct tcpipv6hdr *ti6 = (struct tcpipv6hdr *)headers;
  123         struct tcphdr *th;
  124 
  125         if (tcp_debx == TCP_NDEBUG)
  126                 tcp_debx = 0;
  127         td->td_time = iptime();
  128         td->td_act = act;
  129         td->td_ostate = ostate;
  130         td->td_tcb = (caddr_t)otp;
  131         if (tp) {
  132                 pf = tp->pf;
  133                 td->td_cb = *tp;
  134         } else
  135                 bzero((caddr_t)&td->td_cb, sizeof (*tp));
  136 
  137         bzero(&td->td_ti6, sizeof(struct tcpipv6hdr));
  138         bzero(&td->td_ti, sizeof(struct tcpiphdr));
  139         if (headers) {
  140                 /* The address family may be in tcpcb or ip header. */
  141                 if (pf == PF_UNSPEC) {
  142                         switch (ti6->ti6_i.ip6_vfc & IPV6_VERSION_MASK) {
  143 #ifdef INET6
  144                         case IPV6_VERSION:
  145                                 pf = PF_INET6;
  146                                 break;
  147 #endif /* INET6 */
  148                         case IPVERSION:
  149                                 pf = PF_INET;
  150                                 break;
  151                         }
  152                 }
  153                 switch (pf) {
  154 #ifdef INET6
  155                 case PF_INET6:
  156                         th = &ti6->ti6_t;
  157                         td->td_ti6 = *ti6;
  158                         td->td_ti6.ti6_plen = len;
  159                         break;
  160 #endif /* INET6 */
  161                 case PF_INET:
  162                         th = &ti->ti_t;
  163                         td->td_ti = *ti;
  164                         td->td_ti.ti_len = len;
  165                         break;
  166                 default:
  167                         headers = NULL;
  168                         break;
  169                 }
  170         }
  171 
  172         td->td_req = req;
  173 #ifdef TCPDEBUG
  174         if (tcpconsdebug == 0)
  175                 return;
  176         if (otp)
  177                 printf("%p %s:", otp, tcpstates[ostate]);
  178         else
  179                 printf("???????? ");
  180         printf("%s ", tanames[act]);
  181         switch (act) {
  182 
  183         case TA_INPUT:
  184         case TA_OUTPUT:
  185         case TA_DROP:
  186                 if (headers == NULL)
  187                         break;
  188                 seq = th->th_seq;
  189                 ack = th->th_ack;
  190                 if (act == TA_OUTPUT) {
  191                         seq = ntohl(seq);
  192                         ack = ntohl(ack);
  193                 }
  194                 if (len)
  195                         printf("[%x..%x)", seq, seq+len);
  196                 else
  197                         printf("%x", seq);
  198                 printf("@%x, urp=%x", ack, th->th_urp);
  199                 flags = th->th_flags;
  200                 if (flags) {
  201                         char *cp = "<";
  202 #define pf(f) { if (th->th_flags&TH_##f) { printf("%s%s", cp, #f); cp = ","; } }
  203                         pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG);
  204                         printf(">");
  205                 }
  206                 break;
  207 
  208         case TA_USER:
  209                 printf("%s", prurequests[req]);
  210                 break;
  211 
  212         case TA_TIMER:
  213                 printf("%s", tcptimers[req]);
  214                 break;
  215         }
  216         if (tp)
  217                 printf(" -> %s", tcpstates[tp->t_state]);
  218         /* print out internal state of tp !?! */
  219         printf("\n");
  220         if (tp == NULL)
  221                 return;
  222         printf("\trcv_(nxt,wnd,up) (%x,%lx,%x) snd_(una,nxt,max) (%x,%x,%x)\n",
  223             tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt,
  224             tp->snd_max);
  225         printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%lx)\n",
  226             tp->snd_wl1, tp->snd_wl2, tp->snd_wnd);
  227 #endif /* TCPDEBUG */
  228 }

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

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sys/netinet/tcp_debug.c