2 * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
21 * Format and print trivial file transfer protocol packets.
25 static const char rcsid[] _U_ =
26 "@(#) $Header: /tcpdump/master/tcpdump/print-tftp.c,v 1.37.2.1 2007/09/14 01:03:12 guy Exp $ (LBL)";
33 #include <tcpdump-stdinc.h>
36 #undef SEGSIZE /* SINIX sucks */
42 #include "interface.h"
43 #include "addrtoname.h"
47 /* op code to string mapping */
48 static struct tok op2str[] = {
49 { RRQ, "RRQ" }, /* read request */
50 { WRQ, "WRQ" }, /* write request */
51 { DATA, "DATA" }, /* data packet */
52 { ACK, "ACK" }, /* acknowledgement */
53 { ERROR, "ERROR" }, /* error code */
54 { OACK, "OACK" }, /* option acknowledgement */
58 /* error code to string mapping */
59 static struct tok err2str[] = {
60 { EUNDEF, "EUNDEF" }, /* not defined */
61 { ENOTFOUND, "ENOTFOUND" }, /* file not found */
62 { EACCESS, "EACCESS" }, /* access violation */
63 { ENOSPACE, "ENOSPACE" }, /* disk full or allocation exceeded */
64 { EBADOP, "EBADOP" }, /* illegal TFTP operation */
65 { EBADID, "EBADID" }, /* unknown transfer ID */
66 { EEXISTS, "EEXISTS" }, /* file already exists */
67 { ENOUSER, "ENOUSER" }, /* no such user */
72 * Print trivial file transfer program requests
75 tftp_print(register const u_char *bp, u_int length)
77 register const struct tftphdr *tp;
78 register const char *cp;
79 register const u_char *p;
80 register int opcode, i;
81 static char tstr[] = " [|tftp]";
83 tp = (const struct tftphdr *)bp;
86 printf(" %d", length);
88 /* Print tftp request type */
89 TCHECK(tp->th_opcode);
90 opcode = EXTRACT_16BITS(&tp->th_opcode);
91 cp = tok2str(op2str, "tftp-#%d", opcode);
93 /* Bail if bogus opcode */
103 * XXX Not all arpa/tftp.h's specify th_stuff as any
104 * array; use address of th_block instead
107 p = (u_char *)tp->th_stuff;
109 p = (u_char *)&tp->th_block;
112 /* Print filename or first option */
115 i = fn_print(p, snapend);
119 /* Print the mode (RRQ and WRQ only) and any options */
120 while ((p = (const u_char *)strchr((const char *)p, '\0')) != NULL) {
121 if (length <= (u_int)(p - (const u_char *)&tp->th_block))
126 fn_print(p, snapend);
136 TCHECK(tp->th_block);
137 printf(" block %d", EXTRACT_16BITS(&tp->th_block));
141 /* Print error code string */
143 printf(" %s \"", tok2str(err2str, "tftp-err-#%d \"",
144 EXTRACT_16BITS(&tp->th_code)));
145 /* Print error message string */
146 i = fn_print((const u_char *)tp->th_data, snapend);
153 /* We shouldn't get here */
154 printf("(unknown #%d)", opcode);