tcp_debug.c

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    1 /*      $NetBSD: tcp_debug.c,v 1.19 2003/08/07 16:33:15 agc Exp $       */
    2 
    3 /*
    4  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the project nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  */
   31 
   32 /*
   33  * Copyright (c) 1982, 1986, 1993
   34  *      The Regents of the University of California.  All rights reserved.
   35  *
   36  * Redistribution and use in source and binary forms, with or without
   37  * modification, are permitted provided that the following conditions
   38  * are met:
   39  * 1. Redistributions of source code must retain the above copyright
   40  *    notice, this list of conditions and the following disclaimer.
   41  * 2. Redistributions in binary form must reproduce the above copyright
   42  *    notice, this list of conditions and the following disclaimer in the
   43  *    documentation and/or other materials provided with the distribution.
   44  * 3. Neither the name of the University nor the names of its contributors
   45  *    may be used to endorse or promote products derived from this software
   46  *    without specific prior written permission.
   47  *
   48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   58  * SUCH DAMAGE.
   59  *
   60  *      @(#)tcp_debug.c 8.1 (Berkeley) 6/10/93
   61  */
   62 
   63 #include <sys/cdefs.h>
   64 __KERNEL_RCSID(0, "$NetBSD: tcp_debug.c,v 1.19 2003/08/07 16:33:15 agc Exp $");
   65 
   66 #include "opt_inet.h"
   67 #include "opt_tcp_debug.h"
   68 
   69 #ifdef TCP_DEBUG
   70 /* load symbolic names */
   71 #define PRUREQUESTS
   72 #define TCPSTATES
   73 #define TCPTIMERS
   74 #define TANAMES
   75 
   76 #include <sys/param.h>
   77 #include <sys/systm.h>
   78 #include <sys/mbuf.h>
   79 #include <sys/socket.h>
   80 #include <sys/socketvar.h>
   81 #include <sys/protosw.h>
   82 #include <sys/errno.h>
   83 
   84 #include <net/route.h>
   85 #include <net/if.h>
   86 
   87 #include <netinet/in.h>
   88 #include <netinet/in_systm.h>
   89 #include <netinet/ip.h>
   90 #include <netinet/in_pcb.h>
   91 #include <netinet/ip_var.h>
   92 
   93 #ifdef INET6
   94 #ifndef INET
   95 #include <netinet/in.h>
   96 #endif
   97 #include <netinet/ip6.h>
   98 #endif
   99 
  100 #include <netinet/tcp.h>
  101 #include <netinet/tcp_fsm.h>
  102 #include <netinet/tcp_seq.h>
  103 #include <netinet/tcp_timer.h>
  104 #include <netinet/tcp_var.h>
  105 #include <netinet/tcpip.h>
  106 #include <netinet/tcp_debug.h>
  107 
  108 struct  tcp_debug tcp_debug[TCP_NDEBUG];
  109 int     tcp_debx;
  110 int     tcpconsdebug = 0;
  111 /*
  112  * Tcp debug routines
  113  */
  114 void
  115 tcp_trace(act, ostate, tp, m, req)
  116         short act, ostate;
  117         struct tcpcb *tp;
  118         struct mbuf *m;
  119         int req;
  120 {
  121         tcp_seq seq, ack;
  122         int len, flags;
  123         struct tcphdr *th;
  124         struct tcp_debug *td = &tcp_debug[tcp_debx++];
  125 
  126         if (tcp_debx == TCP_NDEBUG)
  127                 tcp_debx = 0;
  128         td->td_time = iptime();
  129         td->td_act = act;
  130         td->td_ostate = ostate;
  131         td->td_tcb = (caddr_t)tp;
  132         if (tp)
  133                 td->td_cb = *tp;
  134         else
  135                 bzero((caddr_t)&td->td_cb, sizeof (*tp));
  136         td->td_family = tp->t_family;
  137         bzero((caddr_t)&td->td_ti, sizeof (td->td_ti));
  138 #ifdef INET6
  139         bzero((caddr_t)&td->td_ti6, sizeof (td->td_ti6));
  140 #endif
  141         th = NULL;
  142         if (m) {
  143                 struct ip *ip;
  144                 ip = mtod(m, struct ip *);
  145                 switch (ip->ip_v) {
  146                 case 4:
  147                         if (m->m_len < sizeof(td->td_ti))
  148                                 break;
  149                         bcopy(mtod(m, caddr_t), &td->td_ti, sizeof(td->td_ti));
  150                         th = (struct tcphdr *)((caddr_t)&td->td_ti + sizeof(struct ip));
  151                         break;
  152 #ifdef INET6
  153                 case 6:
  154                         if (m->m_len < sizeof(td->td_ti6))
  155                                 break;
  156                         bcopy(mtod(m, caddr_t), &td->td_ti6,
  157                                 sizeof(td->td_ti6));
  158                         th = (struct tcphdr *)((caddr_t)&td->td_ti6 + sizeof(struct ip6_hdr));
  159                         break;
  160 #endif
  161                 }
  162         }
  163         td->td_req = req;
  164         if (tcpconsdebug == 0)
  165                 return;
  166         if (tp)
  167                 printf("%p %s:", tp, tcpstates[ostate]);
  168         else
  169                 printf("???????? ");
  170         printf("%s ", tanames[act]);
  171         switch (act) {
  172 
  173         case TA_INPUT:
  174         case TA_OUTPUT:
  175         case TA_DROP:
  176                 if (th == 0)
  177                         break;
  178                 seq = th->th_seq;
  179                 ack = th->th_ack;
  180                 len = m->m_pkthdr.len;
  181                 if (act == TA_OUTPUT) {
  182                         seq = ntohl(seq);
  183                         ack = ntohl(ack);
  184                         len = ntohs((u_int16_t)len);
  185                 }
  186                 if (act == TA_OUTPUT)
  187                         len -= sizeof (struct tcphdr);
  188                 if (len)
  189                         printf("[%x..%x)", seq, seq+len);
  190                 else
  191                         printf("%x", seq);
  192                 printf("@%x, urp=%x", ack, th->th_urp);
  193                 flags = th->th_flags;
  194                 if (flags) {
  195 #ifndef lint
  196                         char *cp = "<";
  197 #define pf(f) { if (th->th_flags&__CONCAT(TH_,f)) { printf("%s%s", cp, "f"); cp = ","; } }
  198                         pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG);
  199 #endif
  200                         printf(">");
  201                 }
  202                 break;
  203 
  204         case TA_USER:
  205                 printf("%s", prurequests[req&0xff]);
  206                 if ((req & 0xff) == PRU_SLOWTIMO)
  207                         printf("<%s>", tcptimers[req>>8]);
  208                 break;
  209         }
  210         if (tp)
  211                 printf(" -> %s", tcpstates[tp->t_state]);
  212         /* print out internal state of tp !?! */
  213         printf("\n");
  214         if (tp == 0)
  215                 return;
  216         printf("\trcv_(nxt,wnd,up) (%x,%lx,%x) snd_(una,nxt,max) (%x,%x,%x)\n",
  217             tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt,
  218             tp->snd_max);
  219         printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%lx)\n",
  220             tp->snd_wl1, tp->snd_wl2, tp->snd_wnd);
  221 }
  222 #endif /* TCP_DEBUG */

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

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