tcpdump.tproj/print-tftp.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996
  26  *      The Regents of the University of California.  All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that: (1) source code distributions
  30  * retain the above copyright notice and this paragraph in its entirety, (2)
  31  * distributions including binary code include the above copyright notice and
  32  * this paragraph in its entirety in the documentation or other materials
  33  * provided with the distribution, and (3) all advertising materials mentioning
  34  * features or use of this software display the following acknowledgement:
  35  * ``This product includes software developed by the University of California,
  36  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  37  * the University nor the names of its contributors may be used to endorse
  38  * or promote products derived from this software without specific prior
  39  * written permission.
  40  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  41  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  42  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  43  *
  44  * Format and print trivial file transfer protocol packets.
  45  */
  46
  47 #ifndef lint
  48 static const char rcsid[] =
  49     "@(#) $Header: /cvs/Darwin/Commands/NeXT/network_cmds/tcpdump.tproj/print-tftp.c,v 1.1.1.1 1999/05/02 03:58:34 wsanchez Exp $ (LBL)";
  50 #endif
  51
  52 #include <sys/param.h>
  53 #include <sys/time.h>
  54
  55 #include <netinet/in.h>
  56
  57 #include <arpa/tftp.h>
  58
  59 #include <ctype.h>
  60 #include <stdio.h>
  61 #include <string.h>
  62
  63 #include "interface.h"
  64 #include "addrtoname.h"
  65
  66 /* op code to string mapping */
  67 static struct tok op2str[] = {
  68         { RRQ,          "RRQ" },        /* read request */
  69         { WRQ,          "WRQ" },        /* write request */
  70         { DATA,         "DATA" },       /* data packet */
  71         { ACK,          "ACK" },        /* acknowledgement */
  72         { ERROR,        "ERROR" },      /* error code */
  73         { 0,            NULL }
  74 };
  75
  76 /* error code to string mapping */
  77 static struct tok err2str[] = {
  78         { EUNDEF,       "EUNDEF" },     /* not defined */
  79         { ENOTFOUND,    "ENOTFOUND" },  /* file not found */
  80         { EACCESS,      "EACCESS" },    /* access violation */
  81         { ENOSPACE,     "ENOSPACE" },   /* disk full or allocation exceeded */
  82         { EBADOP,       "EBADOP" },     /* illegal TFTP operation */
  83         { EBADID,       "EBADID" },     /* unknown transfer ID */
  84         { EEXISTS,      "EEXISTS" },    /* file already exists */
  85         { ENOUSER,      "ENOUSER" },    /* no such user */
  86         { 0,            NULL }
  87 };
  88
  89 /*
  90  * Print trivial file transfer program requests
  91  */
  92 void
  93 tftp_print(register const u_char *bp, u_int length)
  94 {
  95         register const struct tftphdr *tp;
  96         register const char *cp;
  97         register const u_char *p;
  98         register int opcode, i;
  99         static char tstr[] = " [|tftp]";
 100
 101         tp = (const struct tftphdr *)bp;
 102
 103         /* Print length */
 104         printf(" %d", length);
 105
 106         /* Print tftp request type */
 107         TCHECK(tp->th_opcode);
 108         opcode = ntohs(tp->th_opcode);
 109         cp = tok2str(op2str, "tftp-#%d", opcode);
 110         printf(" %s", cp);
 111         /* Bail if bogus opcode */
 112         if (*cp == 't')
 113                 return;
 114
 115         switch (opcode) {
 116
 117         case RRQ:
 118         case WRQ:
 119                 /*
 120                  * XXX Not all arpa/tftp.h's specify th_stuff as any
 121                  * array; use address of th_block instead
 122                  */
 123 #ifdef notdef
 124                 p = (u_char *)tp->th_stuff;
 125 #else
 126                 p = (u_char *)&tp->th_block;
 127 #endif
 128                 fputs(" \"", stdout);
 129                 i = fn_print(p, snapend);
 130                 putchar('"');
 131                 if (i)
 132                         goto trunc;
 133                 break;
 134
 135         case ACK:
 136         case DATA:
 137                 TCHECK(tp->th_block);
 138                 printf(" block %d", ntohs(tp->th_block));
 139                 break;
 140
 141         case ERROR:
 142                 /* Print error code string */
 143                 TCHECK(tp->th_code);
 144                 printf(" %s ", tok2str(err2str, "tftp-err-#%d \"",
 145                                        ntohs(tp->th_code)));
 146                 /* Print error message string */
 147                 i = fn_print((const u_char *)tp->th_data, snapend);
 148                 putchar('"');
 149                 if (i)
 150                         goto trunc;
 151                 break;
 152
 153         default:
 154                 /* We shouldn't get here */
 155                 printf("(unknown #%d)", opcode);
 156                 break;
 157         }
 158         return;
 159 trunc:
 160         fputs(tstr, stdout);
 161         return;
 162 }