Move tcpdump-3.9/ to tcpdump/. No need for a versioned dir.
[dragonfly.git] / contrib / tcpdump / print-bfd.c
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c8cf0f94
PA
1/*
2 * Redistribution and use in source and binary forms, with or without
3 * modification, are permitted provided that: (1) source code
4 * distributions retain the above copyright notice and this paragraph
5 * in its entirety, and (2) distributions including binary code include
6 * the above copyright notice and this paragraph in its entirety in
7 * the documentation or other materials provided with the distribution.
8 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
9 * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
10 * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
11 * FOR A PARTICULAR PURPOSE.
12 *
13 * Original code by Hannes Gredler (hannes@juniper.net)
14 */
15
16#ifndef lint
17static const char rcsid[] _U_ =
18 "@(#) $Header: /tcpdump/master/tcpdump/print-bfd.c,v 1.5.2.5 2006/02/02 06:36:37 hannes Exp $";
19#endif
20
21#ifdef HAVE_CONFIG_H
22#include "config.h"
23#endif
24
25#include <tcpdump-stdinc.h>
26
27#include <stdio.h>
28#include <stdlib.h>
29
30#include "interface.h"
31#include "extract.h"
32#include "addrtoname.h"
33
34#include "udp.h"
35
36/*
37 * Control packet, BFDv0, draft-katz-ward-bfd-01.txt
38 *
39 * 0 1 2 3
40 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
41 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
42 * |Vers | Diag |H|D|P|F| Rsvd | Detect Mult | Length |
43 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
44 * | My Discriminator |
45 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
46 * | Your Discriminator |
47 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
48 * | Desired Min TX Interval |
49 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
50 * | Required Min RX Interval |
51 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
52 * | Required Min Echo RX Interval |
53 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
54 */
55
56/*
57 * Control packet, BFDv1, draft-ietf-bfd-base-02.txt
58 *
59 * 0 1 2 3
60 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
61 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
62 * |Vers | Diag |Sta|P|F|C|A|D|R| Detect Mult | Length |
63 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
64 * | My Discriminator |
65 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
66 * | Your Discriminator |
67 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
68 * | Desired Min TX Interval |
69 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
70 * | Required Min RX Interval |
71 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
72 * | Required Min Echo RX Interval |
73 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
74 */
75
76struct bfd_header_t {
77 u_int8_t version_diag;
78 u_int8_t flags;
79 u_int8_t detect_time_multiplier;
80 u_int8_t length;
81 u_int8_t my_discriminator[4];
82 u_int8_t your_discriminator[4];
83 u_int8_t desired_min_tx_interval[4];
84 u_int8_t required_min_rx_interval[4];
85 u_int8_t required_min_echo_interval[4];
86};
87
88/*
89 * An optional Authentication Header may be present
90 *
91 * 0 1 2 3
92 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
93 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
94 * | Auth Type | Auth Len | Authentication Data... |
95 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
96 */
97
98struct bfd_auth_header_t {
99 u_int8_t auth_type;
100 u_int8_t auth_len;
101 u_int8_t auth_data;
102};
103
104static const struct tok bfd_v1_authentication_values[] = {
105 { 0, "Reserved" },
106 { 1, "Simple Password" },
107 { 2, "Keyed MD5" },
108 { 3, "Meticulous Keyed MD5" },
109 { 4, "Keyed SHA1" },
110 { 5, "Meticulous Keyed SHA1" },
111 { 0, NULL }
112};
113
114#define BFD_EXTRACT_VERSION(x) (((x)&0xe0)>>5)
115#define BFD_EXTRACT_DIAG(x) ((x)&0x1f)
116
117static const struct tok bfd_port_values[] = {
118 { BFD_CONTROL_PORT, "Control" },
119 { BFD_ECHO_PORT, "Echo" },
120 { 0, NULL }
121};
122
123
124static const struct tok bfd_diag_values[] = {
125 { 0, "No Diagnostic" },
126 { 1, "Control Detection Time Expired" },
127 { 2, "Echo Function Failed" },
128 { 3, "Neighbor Signaled Session Down" },
129 { 4, "Forwarding Plane Reset" },
130 { 5, "Path Down" },
131 { 6, "Concatenated Path Down" },
132 { 7, "Administratively Down" },
133 { 8, "Reverse Concatenated Path Down" },
134 { 0, NULL }
135};
136
137static const struct tok bfd_v0_flag_values[] = {
138 { 0x80, "I Hear You" },
139 { 0x40, "Demand" },
140 { 0x20, "Poll" },
141 { 0x10, "Final" },
142 { 0x08, "Reserved" },
143 { 0x04, "Reserved" },
144 { 0x02, "Reserved" },
145 { 0x01, "Reserved" },
146 { 0, NULL }
147};
148
149#define BFD_FLAG_AUTH 0x04
150
151static const struct tok bfd_v1_flag_values[] = {
152 { 0x20, "Poll" },
153 { 0x10, "Final" },
154 { 0x08, "Control Plane Independent" },
155 { BFD_FLAG_AUTH, "Authentication Present" },
156 { 0x02, "Demand" },
157 { 0x01, "Reserved" },
158 { 0, NULL }
159};
160
161static const struct tok bfd_v1_state_values[] = {
162 { 0, "AdminDown" },
163 { 1, "Down" },
164 { 2, "Init" },
165 { 3, "Up" },
166 { 0, NULL }
167};
168
169void
170bfd_print(register const u_char *pptr, register u_int len, register u_int port)
171{
172 const struct bfd_header_t *bfd_header;
173 const struct bfd_auth_header_t *bfd_auth_header;
174 u_int8_t version;
175
176 bfd_header = (const struct bfd_header_t *)pptr;
177 TCHECK(*bfd_header);
178 version = BFD_EXTRACT_VERSION(bfd_header->version_diag);
179
180 switch (port << 8 | version) {
181
182 /* BFDv0 */
183 case (BFD_CONTROL_PORT << 8):
184 if (vflag < 1 )
185 {
186 printf("BFDv%u, %s, Flags: [%s], length: %u",
187 version,
188 tok2str(bfd_port_values, "unknown (%u)", port),
189 bittok2str(bfd_v0_flag_values, "none", bfd_header->flags),
190 len);
191 return;
192 }
193
194 printf("BFDv%u, length: %u\n\t%s, Flags: [%s], Diagnostic: %s (0x%02x)",
195 version,
196 len,
197 tok2str(bfd_port_values, "unknown (%u)", port),
198 bittok2str(bfd_v0_flag_values, "none", bfd_header->flags),
199 tok2str(bfd_diag_values,"unknown",BFD_EXTRACT_DIAG(bfd_header->version_diag)),
200 BFD_EXTRACT_DIAG(bfd_header->version_diag));
201
202 printf("\n\tDetection Timer Multiplier: %u (%u ms Detection time), BFD Length: %u",
203 bfd_header->detect_time_multiplier,
204 bfd_header->detect_time_multiplier * EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000,
205 bfd_header->length);
206
207
208 printf("\n\tMy Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->my_discriminator));
209 printf(", Your Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->your_discriminator));
210 printf("\n\t Desired min Tx Interval: %4u ms", EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000);
211 printf("\n\t Required min Rx Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_rx_interval)/1000);
212 printf("\n\t Required min Echo Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_echo_interval)/1000);
213 break;
214
215 /* BFDv1 */
216 case (BFD_CONTROL_PORT << 8 | 1):
217 if (vflag < 1 )
218 {
219 printf("BFDv%u, %s, State %s, Flags: [%s], length: %u",
220 version,
221 tok2str(bfd_port_values, "unknown (%u)", port),
222 tok2str(bfd_v1_state_values, "unknown (%u)", (bfd_header->flags & 0xc0) >> 6),
223 bittok2str(bfd_v1_flag_values, "none", bfd_header->flags & 0x3f),
224 len);
225 return;
226 }
227
228 printf("BFDv%u, length: %u\n\t%s, State %s, Flags: [%s], Diagnostic: %s (0x%02x)",
229 version,
230 len,
231 tok2str(bfd_port_values, "unknown (%u)", port),
232 tok2str(bfd_v1_state_values, "unknown (%u)", (bfd_header->flags & 0xc0) >> 6),
233 bittok2str(bfd_v1_flag_values, "none", bfd_header->flags & 0x3f),
234 tok2str(bfd_diag_values,"unknown",BFD_EXTRACT_DIAG(bfd_header->version_diag)),
235 BFD_EXTRACT_DIAG(bfd_header->version_diag));
236
237 printf("\n\tDetection Timer Multiplier: %u (%u ms Detection time), BFD Length: %u",
238 bfd_header->detect_time_multiplier,
239 bfd_header->detect_time_multiplier * EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000,
240 bfd_header->length);
241
242
243 printf("\n\tMy Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->my_discriminator));
244 printf(", Your Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->your_discriminator));
245 printf("\n\t Desired min Tx Interval: %4u ms", EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000);
246 printf("\n\t Required min Rx Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_rx_interval)/1000);
247 printf("\n\t Required min Echo Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_echo_interval)/1000);
248
249 if (bfd_header->flags & BFD_FLAG_AUTH) {
250 pptr += sizeof (const struct bfd_header_t);
251 bfd_auth_header = (const struct bfd_auth_header_t *)pptr;
252 TCHECK2(*bfd_auth_header, sizeof(const struct bfd_auth_header_t));
253 printf("\n\t%s (%u) Authentication, length %u present",
254 tok2str(bfd_v1_authentication_values,"Unknown",bfd_auth_header->auth_type),
255 bfd_auth_header->auth_type,
256 bfd_auth_header->auth_len);
257 }
258 break;
259
260 /* BFDv0 */
261 case (BFD_ECHO_PORT << 8): /* not yet supported - fall through */
262 /* BFDv1 */
263 case (BFD_ECHO_PORT << 8 | 1):
264
265 default:
266 printf("BFD, %s, length: %u",
267 tok2str(bfd_port_values, "unknown (%u)", port),
268 len);
269 if (vflag >= 1) {
270 if(!print_unknown_data(pptr,"\n\t",len))
271 return;
272 }
273 break;
274 }
275 return;
276
277trunc:
278 printf("[|BFD]");
279}