1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include <fcntl.h>
30 #include <arpa/tftp.h>
31 #include "snoop.h"
32
33 extern char *dlc_header;
34 char *tftperror();
35 char *show_type();
36
37 int
interpret_tftp(int flags,struct tftphdr * tftp,int fraglen)38 interpret_tftp(int flags, struct tftphdr *tftp, int fraglen)
39 {
40 char *name, *mode;
41 extern int src_port, dst_port;
42 int blocksize = fraglen - 4;
43
44 switch (ntohs(tftp->th_opcode)) {
45 case RRQ:
46 case WRQ:
47 add_transient(src_port, interpret_tftp);
48 break;
49 case ERROR:
50 del_transient(src_port);
51 break;
52 }
53
54 if (flags & F_SUM) {
55 switch (ntohs(tftp->th_opcode)) {
56 case RRQ:
57 name = (char *)&tftp->th_stuff;
58 mode = name + (strlen(name) + 1);
59 (void) sprintf(get_sum_line(),
60 "TFTP Read \"%s\" (%s)", name, mode);
61 break;
62 case WRQ:
63 name = (char *)&tftp->th_stuff;
64 mode = name + (strlen(name) + 1);
65 (void) sprintf(get_sum_line(),
66 "TFTP Write \"%s\" (%s)", name, mode);
67 break;
68 case DATA:
69 (void) sprintf(get_sum_line(),
70 "TFTP Data block %d (%d bytes)%s",
71 ntohs(tftp->th_block),
72 blocksize,
73 blocksize < 512 ? " (last block)":"");
74 break;
75 case ACK:
76 (void) sprintf(get_sum_line(),
77 "TFTP Ack block %d",
78 ntohs(tftp->th_block));
79 break;
80 case ERROR:
81 (void) sprintf(get_sum_line(),
82 "TFTP Error: %s",
83 tftperror(ntohs(tftp->th_code)));
84 break;
85 }
86 }
87
88 if (flags & F_DTAIL) {
89
90 show_header("TFTP: ", "Trivial File Transfer Protocol", fraglen);
91 show_space();
92 (void) sprintf(get_line((char *)(uintptr_t)tftp->th_opcode -
93 dlc_header, 2),
94 "Opcode = %d (%s)",
95 ntohs(tftp->th_opcode),
96 show_type(ntohs(tftp->th_opcode)));
97
98 switch (ntohs(tftp->th_opcode)) {
99 case RRQ:
100 case WRQ:
101 name = (char *)&tftp->th_stuff;
102 mode = name + (strlen(name) + 1);
103 (void) sprintf(
104 get_line(name - dlc_header, strlen(name) + 1),
105 "File name = \"%s\"",
106 name);
107 (void) sprintf(
108 get_line(mode - dlc_header, strlen(mode) + 1),
109 "Transfer mode = %s",
110 mode);
111 break;
112
113 case DATA:
114 (void) sprintf(
115 get_line((char *)(uintptr_t)tftp->th_block -
116 dlc_header, 2), "Data block = %d%s",
117 ntohs(tftp->th_block),
118 blocksize < 512 ? " (last block)":"");
119 (void) sprintf(get_line((char *)(uintptr_t)tftp->th_data -
120 dlc_header, blocksize),
121 "[ %d bytes of data ]",
122 blocksize);
123 break;
124
125 case ACK:
126 (void) sprintf(get_line((char *)(uintptr_t)tftp->th_block -
127 dlc_header, 2), "Acknowledge block = %d",
128 ntohs(tftp->th_block));
129 break;
130
131 case ERROR:
132 (void) sprintf(get_line((char *)(uintptr_t)tftp->th_code -
133 dlc_header, 2), "Error = %d (%s)",
134 ntohs(tftp->th_code),
135 tftperror(ntohs(tftp->th_code)));
136 (void) sprintf(get_line((char *)(uintptr_t)tftp->th_data -
137 dlc_header, strlen(tftp->th_data) + 1),
138 "Error string = \"%s\"", tftp->th_data);
139 }
140 }
141
142 return (fraglen);
143 }
144
145 char *
show_type(t)146 show_type(t)
147 int t;
148 {
149 switch (t) {
150 case RRQ: return ("read request");
151 case WRQ: return ("write request");
152 case DATA: return ("data packet");
153 case ACK: return ("acknowledgement");
154 case ERROR: return ("error");
155 }
156 return ("?");
157 }
158
159 char *
tftperror(code)160 tftperror(code)
161 unsigned short code;
162 {
163 static char buf[128];
164
165 switch (code) {
166 case EUNDEF: return ("not defined");
167 case ENOTFOUND: return ("file not found");
168 case EACCESS: return ("access violation");
169 case ENOSPACE: return ("disk full or allocation exceeded");
170 case EBADOP: return ("illegal TFTP operation");
171 case EBADID: return ("unknown transfer ID");
172 case EEXISTS: return ("file already exists");
173 case ENOUSER: return ("no such user");
174 }
175 (void) sprintf(buf, "%d", code);
176
177 return (buf);
178 }
179