Move tcpdump-3.9/ to tcpdump/. No need for a versioned dir.
[dragonfly.git] / contrib / tcpdump / print-tftp.c
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1/*
2 * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
4 *
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
16 * written permission.
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.
20 *
21 * Format and print trivial file transfer protocol packets.
22 */
23
24#ifndef lint
25static const char rcsid[] _U_ =
825e8fa1 26 "@(#) $Header: /tcpdump/master/tcpdump/print-tftp.c,v 1.37.2.1 2007/09/14 01:03:12 guy Exp $ (LBL)";
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27#endif
28
29#ifdef HAVE_CONFIG_H
30#include "config.h"
31#endif
32
33#include <tcpdump-stdinc.h>
34
35#ifdef SEGSIZE
36#undef SEGSIZE /* SINIX sucks */
37#endif
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38
39#include <stdio.h>
40#include <string.h>
41
42#include "interface.h"
43#include "addrtoname.h"
44#include "extract.h"
825e8fa1 45#include "tftp.h"
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46
47/* op code to string mapping */
48static 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 */
825e8fa1 54 { OACK, "OACK" }, /* option acknowledgement */
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55 { 0, NULL }
56};
57
58/* error code to string mapping */
59static 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 */
68 { 0, NULL }
69};
70
71/*
72 * Print trivial file transfer program requests
73 */
74void
75tftp_print(register const u_char *bp, u_int length)
76{
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]";
82
83 tp = (const struct tftphdr *)bp;
84
85 /* Print length */
86 printf(" %d", length);
87
88 /* Print tftp request type */
89 TCHECK(tp->th_opcode);
90 opcode = EXTRACT_16BITS(&tp->th_opcode);
91 cp = tok2str(op2str, "tftp-#%d", opcode);
92 printf(" %s", cp);
93 /* Bail if bogus opcode */
94 if (*cp == 't')
95 return;
96
97 switch (opcode) {
98
99 case RRQ:
100 case WRQ:
825e8fa1 101 case OACK:
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102 /*
103 * XXX Not all arpa/tftp.h's specify th_stuff as any
104 * array; use address of th_block instead
105 */
106#ifdef notdef
107 p = (u_char *)tp->th_stuff;
108#else
109 p = (u_char *)&tp->th_block;
110#endif
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111 putchar(' ');
112 /* Print filename or first option */
113 if (opcode != OACK)
114 putchar('"');
c8cf0f94 115 i = fn_print(p, snapend);
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116 if (opcode != OACK)
117 putchar('"');
c8cf0f94 118
825e8fa1 119 /* Print the mode (RRQ and WRQ only) and any options */
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120 while ((p = (const u_char *)strchr((const char *)p, '\0')) != NULL) {
121 if (length <= (u_int)(p - (const u_char *)&tp->th_block))
122 break;
123 p++;
124 if (*p != '\0') {
125 putchar(' ');
126 fn_print(p, snapend);
127 }
128 }
129
130 if (i)
131 goto trunc;
132 break;
133
134 case ACK:
135 case DATA:
136 TCHECK(tp->th_block);
137 printf(" block %d", EXTRACT_16BITS(&tp->th_block));
138 break;
139
140 case ERROR:
141 /* Print error code string */
142 TCHECK(tp->th_code);
825e8fa1 143 printf(" %s \"", tok2str(err2str, "tftp-err-#%d \"",
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144 EXTRACT_16BITS(&tp->th_code)));
145 /* Print error message string */
146 i = fn_print((const u_char *)tp->th_data, snapend);
147 putchar('"');
148 if (i)
149 goto trunc;
150 break;
151
152 default:
153 /* We shouldn't get here */
154 printf("(unknown #%d)", opcode);
155 break;
156 }
157 return;
158trunc:
159 fputs(tstr, stdout);
160 return;
161}