bsd/netinet/tcp_debug.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright (c) 1982, 1986, 1993
  24  *      The Regents of the University of California.  All rights reserved.
  25  *
  26  * Redistribution and use in source and binary forms, with or without
  27  * modification, are permitted provided that the following conditions
  28  * are met:
  29  * 1. Redistributions of source code must retain the above copyright
  30  *    notice, this list of conditions and the following disclaimer.
  31  * 2. Redistributions in binary form must reproduce the above copyright
  32  *    notice, this list of conditions and the following disclaimer in the
  33  *    documentation and/or other materials provided with the distribution.
  34  * 3. All advertising materials mentioning features or use of this software
  35  *    must display the following acknowledgement:
  36  *      This product includes software developed by the University of
  37  *      California, Berkeley and its contributors.
  38  * 4. Neither the name of the University nor the names of its contributors
  39  *    may be used to endorse or promote products derived from this software
  40  *    without specific prior written permission.
  41  *
  42  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  43  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  44  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  45  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  46  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  47  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  48  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  49  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  50  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  51  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  52  * SUCH DAMAGE.
  53  *
  54  *      @(#)tcp_debug.c 8.1 (Berkeley) 6/10/93
  55  */
  56
  57 #if ISFB31
  58 #include "opt_inet.h"
  59 #include "opt_tcpdebug.h"
  60 #endif
  61
  62 #ifndef INET
  63 #error The option TCPDEBUG requires option INET.
  64 #endif
  65
  66 #if TCPDEBUG
  67 /* load symbolic names */
  68 #define PRUREQUESTS
  69 #define TCPSTATES
  70 #define TCPTIMERS
  71 #define TANAMES
  72 #endif
  73
  74 #include <sys/param.h>
  75 #include <sys/systm.h>
  76 #include <sys/protosw.h>
  77
  78 #include <netinet/in.h>
  79 #include <netinet/in_systm.h>
  80 #include <netinet/ip.h>
  81 #include <netinet/ip6.h>
  82 #include <netinet/ip_var.h>
  83 #include <netinet/tcp.h>
  84 #include <netinet/tcp_fsm.h>
  85 #include <netinet/tcp_timer.h>
  86 #include <netinet/tcp_var.h>
  87 #include <netinet/tcpip.h>
  88 #include <netinet/tcp_debug.h>
  89
  90 #if TCPDEBUG
  91 static int      tcpconsdebug = 0;
  92 #endif
  93
  94 static struct tcp_debug tcp_debug[TCP_NDEBUG];
  95 static int      tcp_debx;
  96
  97 /*
  98  * Tcp debug routines
  99  */
 100 void
 101 tcp_trace(act, ostate, tp, ip, th, req)
 102         short act, ostate;
 103         struct tcpcb *tp;
 104 #if INET6
 105         void *ip;
 106 #else
 107         struct ip *ip;
 108 #endif
 109         struct tcphdr *th;
 110         int req;
 111 {
 112 #if INET6
 113         int isipv6 = (ip != NULL && ((struct ip *)ip)->ip_v == 6) ? 1 : 0;
 114 #endif /* INET6 */
 115         tcp_seq seq, ack;
 116         int len, flags;
 117         struct tcp_debug *td = &tcp_debug[tcp_debx++];
 118
 119         if (tcp_debx == TCP_NDEBUG)
 120                 tcp_debx = 0;
 121         td->td_time = iptime();
 122         td->td_act = act;
 123         td->td_ostate = ostate;
 124         td->td_tcb = (caddr_t)tp;
 125         if (tp)
 126                 td->td_cb = *tp;
 127         else
 128                 bzero((caddr_t)&td->td_cb, sizeof (*tp));
 129         if (ip) {
 130 #if INET6
 131                 if (isipv6)
 132                         td->td_ip6 = *(struct ip6_hdr *)ip;
 133                 else
 134                         td->td_ip = *(struct ip *)ip;
 135 #else /* INET6 */
 136                 td->td_ip = *ip;
 137 #endif /* INET6 */
 138         } else
 139 #if INET6
 140                 bzero((caddr_t)&td->_td_ipx, sizeof (td->_td_ipx));
 141 #else /* INET6 */
 142                 bzero((caddr_t)&td->td_ip, sizeof (*ip));
 143 #endif /* INET6 */
 144         if (th)
 145                 td->td_th = *th;
 146
 147         td->td_req = req;
 148 #if TCPDEBUG
 149         if (tcpconsdebug == 0)
 150                 return;
 151         if (tp)
 152                 printf("%p %s:", tp, tcpstates[ostate]);
 153         else
 154                 printf("???????? ");
 155         printf("%s ", tanames[act]);
 156         switch (act) {
 157
 158         case TA_INPUT:
 159         case TA_OUTPUT:
 160         case TA_DROP:
 161                 if (ip == 0)
 162                         break;
 163 #if INET6
 164                 if (isipv6) {
 165                         len = ((struct ip6_hdr *)ip)->ip6_plen;
 166                 } else {
 167                         len = ((struct ip *)ip)->ip_len;
 168                 }
 169 #else /* INET6 */
 170                 len = ip->ip_len;
 171 #endif /* INET6 */
 172                 seq = th->th_seq;
 173                 ack = th->th_ack;
 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                         printf("[%x..%x)", seq, seq+len);
 183                 else
 184                         printf("%x", seq);
 185                 printf("@%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                 printf("%s%s", cp, #f);         \
 192                 cp = ",";                       \
 193         }                                       \
 194 }
 195                         pf(SYN); pf(ACK); pf(FIN); pf(RST); pf(PUSH); pf(URG);
 196                         printf(">");
 197                 }
 198                 break;
 199
 200         case TA_USER:
 201                 printf("%s", prurequests[req&0xff]);
 202                 if ((req & 0xff) == PRU_SLOWTIMO)
 203                         printf("<%s>", tcptimers[req>>8]);
 204                 break;
 205         }
 206         if (tp)
 207                 printf(" -> %s", tcpstates[tp->t_state]);
 208         /* print out internal state of tp !?! */
 209         printf("\n");
 210         if (tp == 0)
 211                 return;
 212         printf(
 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         printf("\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 }