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.
13 * Original code by Hannes Gredler (hannes@juniper.net)
17 static const char rcsid[] _U_ =
18 "@(#) $Header: /tcpdump/master/tcpdump/print-bfd.c,v 1.10 2006-02-02 06:35:52 hannes Exp $";
25 #include <tcpdump-stdinc.h>
30 #include "interface.h"
32 #include "addrtoname.h"
37 * Control packet, BFDv0, draft-katz-ward-bfd-01.txt
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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
57 * Control packet, BFDv1, draft-ietf-bfd-base-02.txt
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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
77 u_int8_t version_diag;
79 u_int8_t detect_time_multiplier;
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];
89 * An optional Authentication Header may be present
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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
98 struct bfd_auth_header_t {
104 static const struct tok bfd_v1_authentication_values[] = {
106 { 1, "Simple Password" },
108 { 3, "Meticulous Keyed MD5" },
110 { 5, "Meticulous Keyed SHA1" },
114 #define BFD_EXTRACT_VERSION(x) (((x)&0xe0)>>5)
115 #define BFD_EXTRACT_DIAG(x) ((x)&0x1f)
117 static const struct tok bfd_port_values[] = {
118 { BFD_CONTROL_PORT, "Control" },
119 { BFD_ECHO_PORT, "Echo" },
124 static 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" },
131 { 6, "Concatenated Path Down" },
132 { 7, "Administratively Down" },
133 { 8, "Reverse Concatenated Path Down" },
137 static const struct tok bfd_v0_flag_values[] = {
138 { 0x80, "I Hear You" },
142 { 0x08, "Reserved" },
143 { 0x04, "Reserved" },
144 { 0x02, "Reserved" },
145 { 0x01, "Reserved" },
149 #define BFD_FLAG_AUTH 0x04
151 static const struct tok bfd_v1_flag_values[] = {
154 { 0x08, "Control Plane Independent" },
155 { BFD_FLAG_AUTH, "Authentication Present" },
157 { 0x01, "Reserved" },
161 static const struct tok bfd_v1_state_values[] = {
170 bfd_print(register const u_char *pptr, register u_int len, register u_int port)
172 const struct bfd_header_t *bfd_header;
173 const struct bfd_auth_header_t *bfd_auth_header;
174 u_int8_t version = 0;
176 bfd_header = (const struct bfd_header_t *)pptr;
177 if (port == BFD_CONTROL_PORT) {
179 version = BFD_EXTRACT_VERSION(bfd_header->version_diag);
180 } else if (port == BFD_ECHO_PORT) {
181 /* Echo is BFD v1 only */
184 switch ((port << 8) | version) {
187 case (BFD_CONTROL_PORT << 8):
190 printf("BFDv%u, %s, Flags: [%s], length: %u",
192 tok2str(bfd_port_values, "unknown (%u)", port),
193 bittok2str(bfd_v0_flag_values, "none", bfd_header->flags),
198 printf("BFDv%u, length: %u\n\t%s, Flags: [%s], Diagnostic: %s (0x%02x)",
201 tok2str(bfd_port_values, "unknown (%u)", port),
202 bittok2str(bfd_v0_flag_values, "none", bfd_header->flags),
203 tok2str(bfd_diag_values,"unknown",BFD_EXTRACT_DIAG(bfd_header->version_diag)),
204 BFD_EXTRACT_DIAG(bfd_header->version_diag));
206 printf("\n\tDetection Timer Multiplier: %u (%u ms Detection time), BFD Length: %u",
207 bfd_header->detect_time_multiplier,
208 bfd_header->detect_time_multiplier * EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000,
212 printf("\n\tMy Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->my_discriminator));
213 printf(", Your Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->your_discriminator));
214 printf("\n\t Desired min Tx Interval: %4u ms", EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000);
215 printf("\n\t Required min Rx Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_rx_interval)/1000);
216 printf("\n\t Required min Echo Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_echo_interval)/1000);
220 case (BFD_CONTROL_PORT << 8 | 1):
223 printf("BFDv%u, %s, State %s, Flags: [%s], length: %u",
225 tok2str(bfd_port_values, "unknown (%u)", port),
226 tok2str(bfd_v1_state_values, "unknown (%u)", (bfd_header->flags & 0xc0) >> 6),
227 bittok2str(bfd_v1_flag_values, "none", bfd_header->flags & 0x3f),
232 printf("BFDv%u, length: %u\n\t%s, State %s, Flags: [%s], Diagnostic: %s (0x%02x)",
235 tok2str(bfd_port_values, "unknown (%u)", port),
236 tok2str(bfd_v1_state_values, "unknown (%u)", (bfd_header->flags & 0xc0) >> 6),
237 bittok2str(bfd_v1_flag_values, "none", bfd_header->flags & 0x3f),
238 tok2str(bfd_diag_values,"unknown",BFD_EXTRACT_DIAG(bfd_header->version_diag)),
239 BFD_EXTRACT_DIAG(bfd_header->version_diag));
241 printf("\n\tDetection Timer Multiplier: %u (%u ms Detection time), BFD Length: %u",
242 bfd_header->detect_time_multiplier,
243 bfd_header->detect_time_multiplier * EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000,
247 printf("\n\tMy Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->my_discriminator));
248 printf(", Your Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->your_discriminator));
249 printf("\n\t Desired min Tx Interval: %4u ms", EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000);
250 printf("\n\t Required min Rx Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_rx_interval)/1000);
251 printf("\n\t Required min Echo Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_echo_interval)/1000);
253 if (bfd_header->flags & BFD_FLAG_AUTH) {
254 pptr += sizeof (const struct bfd_header_t);
255 bfd_auth_header = (const struct bfd_auth_header_t *)pptr;
256 TCHECK2(*bfd_auth_header, sizeof(const struct bfd_auth_header_t));
257 printf("\n\t%s (%u) Authentication, length %u present",
258 tok2str(bfd_v1_authentication_values,"Unknown",bfd_auth_header->auth_type),
259 bfd_auth_header->auth_type,
260 bfd_auth_header->auth_len);
265 case (BFD_ECHO_PORT << 8): /* not yet supported - fall through */
267 case (BFD_ECHO_PORT << 8 | 1):
270 printf("BFD, %s, length: %u",
271 tok2str(bfd_port_values, "unknown (%u)", port),
274 if(!print_unknown_data(pptr,"\n\t",len))