154 lines
4.1 KiB
C
154 lines
4.1 KiB
C
/*
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* Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Format and print trivial file transfer protocol packets.
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*/
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#ifndef lint
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static const char rcsid[] _U_ =
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"@(#) $Header: /tcpdump/master/tcpdump/print-tftp.c,v 1.39 2008-04-11 16:47:38 gianluca Exp $ (LBL)";
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#endif
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <tcpdump-stdinc.h>
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#ifdef SEGSIZE
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#undef SEGSIZE /* SINIX sucks */
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#endif
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#include <stdio.h>
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#include <string.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "extract.h"
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#include "tftp.h"
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/* op code to string mapping */
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static struct tok op2str[] = {
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{ RRQ, "RRQ" }, /* read request */
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{ WRQ, "WRQ" }, /* write request */
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{ DATA, "DATA" }, /* data packet */
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{ ACK, "ACK" }, /* acknowledgement */
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{ TFTP_ERROR, "ERROR" }, /* error code */
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{ OACK, "OACK" }, /* option acknowledgement */
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{ 0, NULL }
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};
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/* error code to string mapping */
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static struct tok err2str[] = {
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{ EUNDEF, "EUNDEF" }, /* not defined */
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{ ENOTFOUND, "ENOTFOUND" }, /* file not found */
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{ EACCESS, "EACCESS" }, /* access violation */
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{ ENOSPACE, "ENOSPACE" }, /* disk full or allocation exceeded */
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{ EBADOP, "EBADOP" }, /* illegal TFTP operation */
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{ EBADID, "EBADID" }, /* unknown transfer ID */
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{ EEXISTS, "EEXISTS" }, /* file already exists */
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{ ENOUSER, "ENOUSER" }, /* no such user */
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{ 0, NULL }
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};
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/*
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* Print trivial file transfer program requests
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*/
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void
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tftp_print(register const u_char *bp, u_int length)
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{
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register const struct tftphdr *tp;
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register const char *cp;
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register const u_char *p;
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register int opcode, i;
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static char tstr[] = " [|tftp]";
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tp = (const struct tftphdr *)bp;
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/* Print length */
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printf(" %d", length);
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/* Print tftp request type */
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TCHECK(tp->th_opcode);
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opcode = EXTRACT_16BITS(&tp->th_opcode);
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cp = tok2str(op2str, "tftp-#%d", opcode);
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printf(" %s", cp);
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/* Bail if bogus opcode */
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if (*cp == 't')
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return;
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switch (opcode) {
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case RRQ:
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case WRQ:
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case OACK:
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p = (u_char *)tp->th_stuff;
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putchar(' ');
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/* Print filename or first option */
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if (opcode != OACK)
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putchar('"');
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i = fn_print(p, snapend);
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if (opcode != OACK)
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putchar('"');
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/* Print the mode (RRQ and WRQ only) and any options */
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while ((p = (const u_char *)strchr((const char *)p, '\0')) != NULL) {
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if (length <= (u_int)(p - (const u_char *)&tp->th_block))
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break;
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p++;
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if (*p != '\0') {
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putchar(' ');
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fn_print(p, snapend);
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}
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}
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if (i)
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goto trunc;
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break;
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case ACK:
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case DATA:
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TCHECK(tp->th_block);
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printf(" block %d", EXTRACT_16BITS(&tp->th_block));
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break;
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case TFTP_ERROR:
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/* Print error code string */
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TCHECK(tp->th_code);
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printf(" %s \"", tok2str(err2str, "tftp-err-#%d \"",
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EXTRACT_16BITS(&tp->th_code)));
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/* Print error message string */
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i = fn_print((const u_char *)tp->th_data, snapend);
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putchar('"');
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if (i)
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goto trunc;
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break;
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default:
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/* We shouldn't get here */
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printf("(unknown #%d)", opcode);
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break;
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}
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return;
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trunc:
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fputs(tstr, stdout);
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return;
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}
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