sys/netinet/tcp_debug.c

   1 /*      $NetBSD: tcp_debug.c,v 1.27 2009/03/18 17:06:52 cegger 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 1.27 2009/03/18 17:06:52 cegger Exp $");
  65
  66 #include "opt_inet.h"
  67 #include "opt_tcp_debug.h"
  68
  69 /* load symbolic names */
  70 #define PRUREQUESTS
  71 #define TCPSTATES
  72 #define TCPTIMERS
  73 #define TANAMES
  74
  75 #include <sys/param.h>
  76 #include <sys/systm.h>
  77 #include <sys/mbuf.h>
  78 #include <sys/socket.h>
  79 #include <sys/socketvar.h>
  80 #include <sys/protosw.h>
  81 #include <sys/errno.h>
  82
  83 #include <net/route.h>
  84 #include <net/if.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
  92 #ifdef INET6
  93 #ifndef INET
  94 #include <netinet/in.h>
  95 #endif
  96 #include <netinet/ip6.h>
  97 #endif
  98
  99 #include <netinet/tcp.h>
 100 #include <netinet/tcp_fsm.h>
 101 #include <netinet/tcp_seq.h>
 102 #include <netinet/tcp_timer.h>
 103 #include <netinet/tcp_var.h>
 104 #include <netinet/tcpip.h>
 105 #include <netinet/tcp_debug.h>
 106
 107 struct  tcp_debug tcp_debug[TCP_NDEBUG];
 108 int     tcp_debx;
 109 int     tcpconsdebug = 0;
 110 /*
 111  * Tcp debug routines
 112  */
 113 void
 114 tcp_trace(short act, short ostate, struct tcpcb *tp, struct mbuf *m, int req)
 115 {
 116         tcp_seq seq, ack;
 117         int len, flags;
 118         struct tcphdr *th;
 119         struct tcp_debug *td = &tcp_debug[tcp_debx++];
 120
 121         if (tcp_debx == TCP_NDEBUG)
 122                 tcp_debx = 0;
 123         td->td_time = iptime();
 124         td->td_act = act;
 125         td->td_ostate = ostate;
 126         td->td_tcb = (void *)tp;
 127         if (tp)
 128                 td->td_cb = *tp;
 129         else
 130                 memset((void *)&td->td_cb, 0, sizeof (*tp));
 131         td->td_family = tp->t_family;
 132         memset((void *)&td->td_ti, 0, sizeof (td->td_ti));
 133 #ifdef INET6
 134         memset((void *)&td->td_ti6, 0, sizeof (td->td_ti6));
 135 #endif
 136         th = NULL;
 137         if (m) {
 138                 struct ip *ip;
 139                 ip = mtod(m, struct ip *);
 140                 switch (ip->ip_v) {
 141                 case 4:
 142                         if (m->m_len < sizeof(td->td_ti))
 143                                 break;
 144                         memcpy(&td->td_ti, mtod(m, void *), sizeof(td->td_ti));
 145                         th = (struct tcphdr *)((char *)&td->td_ti +
 146                             sizeof(struct ip));
 147                         break;
 148 #ifdef INET6
 149                 case 6:
 150                         if (m->m_len < sizeof(td->td_ti6))
 151                                 break;
 152                         memcpy(&td->td_ti6, mtod(m, void *),
 153                                 sizeof(td->td_ti6));
 154                         th = (struct tcphdr *)((char *)&td->td_ti6 +
 155                             sizeof(struct ip6_hdr));
 156                         break;
 157 #endif
 158                 }
 159         }
 160         td->td_req = req;
 161         if (tcpconsdebug == 0)
 162                 return;
 163         if (tp)
 164                 printf("%p %s:", tp, tcpstates[ostate]);
 165         else
 166                 printf("???????? ");
 167         printf("%s ", tanames[act]);
 168         switch (act) {
 169
 170         case TA_INPUT:
 171         case TA_OUTPUT:
 172         case TA_DROP:
 173                 if (th == 0)
 174                         break;
 175                 seq = th->th_seq;
 176                 ack = th->th_ack;
 177                 len = m->m_pkthdr.len;
 178                 if (act == TA_OUTPUT) {
 179                         seq = ntohl(seq);
 180                         ack = ntohl(ack);
 181                         len = ntohs((u_int16_t)len);
 182                 }
 183                 if (act == TA_OUTPUT)
 184                         len -= sizeof (struct tcphdr);
 185                 if (len)
 186                         printf("[%x..%x)", seq, seq+len);
 187                 else
 188                         printf("%x", seq);
 189                 printf("@%x, urp=%x", ack, th->th_urp);
 190                 flags = th->th_flags;
 191                 if (flags) {
 192 #ifndef lint
 193                         const char *cp = "<";
 194 #define pf(f) { if (th->th_flags&__CONCAT(TH_,f)) { \
 195         printf("%s%s", cp, "f"); cp = ","; } }
 196                         pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG);
 197 #endif
 198                         printf(">");
 199                 }
 200                 break;
 201
 202         case TA_USER:
 203                 printf("%s", prurequests[req&0xff]);
 204                 if ((req & 0xff) == PRU_SLOWTIMO)
 205                         printf("<%s>", tcptimers[req>>8]);
 206                 break;
 207         }
 208         if (tp)
 209                 printf(" -> %s", tcpstates[tp->t_state]);
 210         /* print out internal state of tp !?! */
 211         printf("\n");
 212         if (tp == 0)
 213                 return;
 214         printf("\trcv_(nxt,wnd,up) (%x,%lx,%x) snd_(una,nxt,max) (%x,%x,%x)\n",
 215             tp->rcv_nxt, tp->rcv_wnd, tp->rcv_up, tp->snd_una, tp->snd_nxt,
 216             tp->snd_max);
 217         printf("\tsnd_(wl1,wl2,wnd) (%x,%x,%lx)\n",
 218             tp->snd_wl1, tp->snd_wl2, tp->snd_wnd);
 219 }