freebsd-nq/contrib/tcpdump/print-tftp.c

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/*
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* Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* Format and print trivial file transfer protocol packets.
*/
#ifndef lint
static const char rcsid[] _U_ =
Update tcpdump to 4.1.1. Changes: Thu. April 1, 2010. guy@alum.mit.edu. Summary for 4.1.1 tcpdump release Fix build on systems with PF, such as FreeBSD and OpenBSD. Don't blow up if a zero-length link-layer address is passed to linkaddr_string(). Thu. March 11, 2010. ken@netfunctional.ca/guy@alum.mit.edu. Summary for 4.1.0 tcpdump release Fix printing of MAC addresses for VLAN frames with a length field Add some additional bounds checks and use the EXTRACT_ macros more Add a -b flag to print the AS number in BGP packets in ASDOT notation rather than ASPLAIN notation Add ICMPv6 RFC 5006 support Decode the access flags in NFS access requests Handle the new DLT_ for memory-mapped USB captures on Linux Make the default snapshot (-s) the maximum Print name of device (when -L is used) Support for OpenSolaris (and SXCE build 125 and later) Print new TCP flags Add support for RPL DIO Add support for TCP User Timeout (UTO) Add support for non-standard Ethertypes used by 3com PPPoE gear Add support for 802.11n and 802.11s Add support for Transparent Ethernet Bridge ethertype in GRE Add 4 byte AS support for BGP printer Add support for the MDT SAFI 66 BG printer Add basic IPv6 support to print-olsr Add USB printer Add printer for ForCES Handle frames with an FCS Handle 802.11n Control Wrapper, Block Acq Req and Block Ack frames Fix TCP sequence number printing Report 802.2 packets as 802.2 instead of 802.3 Don't include -L/usr/lib in LDFLAGS On x86_64 Linux, look in lib64 directory too Lots of code clean ups Autoconf clean ups Update testcases to make output changes Fix compiling with/out smi (--with{,out}-smi) Fix compiling without IPv6 support (--disable-ipv6)
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"@(#) $Header: /tcpdump/master/tcpdump/print-tftp.c,v 1.39 2008-04-11 16:47:38 gianluca Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tcpdump-stdinc.h>
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#ifdef SEGSIZE
#undef SEGSIZE /* SINIX sucks */
#endif
#include <stdio.h>
#include <string.h>
#include "interface.h"
#include "addrtoname.h"
#include "extract.h"
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#include "tftp.h"
/* op code to string mapping */
static struct tok op2str[] = {
{ RRQ, "RRQ" }, /* read request */
{ WRQ, "WRQ" }, /* write request */
{ DATA, "DATA" }, /* data packet */
{ ACK, "ACK" }, /* acknowledgement */
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{ TFTP_ERROR, "ERROR" }, /* error code */
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{ OACK, "OACK" }, /* option acknowledgement */
{ 0, NULL }
};
/* error code to string mapping */
static struct tok err2str[] = {
{ EUNDEF, "EUNDEF" }, /* not defined */
{ ENOTFOUND, "ENOTFOUND" }, /* file not found */
{ EACCESS, "EACCESS" }, /* access violation */
{ ENOSPACE, "ENOSPACE" }, /* disk full or allocation exceeded */
{ EBADOP, "EBADOP" }, /* illegal TFTP operation */
{ EBADID, "EBADID" }, /* unknown transfer ID */
{ EEXISTS, "EEXISTS" }, /* file already exists */
{ ENOUSER, "ENOUSER" }, /* no such user */
{ 0, NULL }
};
/*
* Print trivial file transfer program requests
*/
void
tftp_print(register const u_char *bp, u_int length)
{
register const struct tftphdr *tp;
register const char *cp;
register const u_char *p;
register int opcode, i;
static char tstr[] = " [|tftp]";
tp = (const struct tftphdr *)bp;
/* Print length */
printf(" %d", length);
/* Print tftp request type */
TCHECK(tp->th_opcode);
opcode = EXTRACT_16BITS(&tp->th_opcode);
cp = tok2str(op2str, "tftp-#%d", opcode);
printf(" %s", cp);
/* Bail if bogus opcode */
if (*cp == 't')
return;
switch (opcode) {
case RRQ:
case WRQ:
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case OACK:
/*
* XXX Not all arpa/tftp.h's specify th_stuff as any
* array; use address of th_block instead
*/
#ifdef notdef
p = (u_char *)tp->th_stuff;
#else
p = (u_char *)&tp->th_block;
#endif
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putchar(' ');
/* Print filename or first option */
if (opcode != OACK)
putchar('"');
i = fn_print(p, snapend);
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if (opcode != OACK)
putchar('"');
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/* Print the mode (RRQ and WRQ only) and any options */
while ((p = (const u_char *)strchr((const char *)p, '\0')) != NULL) {
if (length <= (u_int)(p - (const u_char *)&tp->th_block))
break;
p++;
if (*p != '\0') {
putchar(' ');
fn_print(p, snapend);
}
}
if (i)
goto trunc;
break;
case ACK:
case DATA:
TCHECK(tp->th_block);
printf(" block %d", EXTRACT_16BITS(&tp->th_block));
break;
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case TFTP_ERROR:
/* Print error code string */
TCHECK(tp->th_code);
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printf(" %s \"", tok2str(err2str, "tftp-err-#%d \"",
EXTRACT_16BITS(&tp->th_code)));
/* Print error message string */
i = fn_print((const u_char *)tp->th_data, snapend);
putchar('"');
if (i)
goto trunc;
break;
default:
/* We shouldn't get here */
printf("(unknown #%d)", opcode);
break;
}
return;
trunc:
fputs(tstr, stdout);
return;
}