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phunix/external/bsd/tcpdump/dist/print-bfd.c
David van Moolenbroek b636d99d91 Import NetBSD tcpdump(8) 
For now, printing of Sun RPC requests is disabled because we do not
yet have the RPC header files.  This should affect basically noone,
as we do not have any RPC-based programs yet, for the same reason.

Change-Id: Ie7818faaaacdc104d8b2c37a68866b4ce18247d6
2017-03-21 22:00:21 +00:00

288 lines
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/*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code
* distributions retain the above copyright notice and this paragraph
* in its entirety, and (2) distributions including binary code include
* the above copyright notice and this paragraph in its entirety in
* the documentation or other materials provided with the distribution.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND
* WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
* LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE.
*
* Original code by Hannes Gredler (hannes@juniper.net)
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: print-bfd.c,v 1.4 2014/11/20 03:05:03 christos Exp $");
#endif
#define NETDISSECT_REWORKED
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tcpdump-stdinc.h>
#include "interface.h"
#include "extract.h"
#include "udp.h"
/*
* Control packet, BFDv0, draft-katz-ward-bfd-01.txt
*
* 0 1 2 3
* 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* |Vers | Diag |H|D|P|F| Rsvd | Detect Mult | Length |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | My Discriminator |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Your Discriminator |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Desired Min TX Interval |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Required Min RX Interval |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Required Min Echo RX Interval |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
/*
* Control packet, BFDv1, draft-ietf-bfd-base-02.txt
*
* 0 1 2 3
* 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* |Vers | Diag |Sta|P|F|C|A|D|R| Detect Mult | Length |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | My Discriminator |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Your Discriminator |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Desired Min TX Interval |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Required Min RX Interval |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Required Min Echo RX Interval |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
struct bfd_header_t {
uint8_t version_diag;
uint8_t flags;
uint8_t detect_time_multiplier;
uint8_t length;
uint8_t my_discriminator[4];
uint8_t your_discriminator[4];
uint8_t desired_min_tx_interval[4];
uint8_t required_min_rx_interval[4];
uint8_t required_min_echo_interval[4];
};
/*
* An optional Authentication Header may be present
*
* 0 1 2 3
* 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Auth Type | Auth Len | Authentication Data... |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
struct bfd_auth_header_t {
uint8_t auth_type;
uint8_t auth_len;
uint8_t auth_data;
};
static const struct tok bfd_v1_authentication_values[] = {
{ 0, "Reserved" },
{ 1, "Simple Password" },
{ 2, "Keyed MD5" },
{ 3, "Meticulous Keyed MD5" },
{ 4, "Keyed SHA1" },
{ 5, "Meticulous Keyed SHA1" },
{ 0, NULL }
};
#define BFD_EXTRACT_VERSION(x) (((x)&0xe0)>>5)
#define BFD_EXTRACT_DIAG(x) ((x)&0x1f)
static const struct tok bfd_port_values[] = {
{ BFD_CONTROL_PORT, "Control" },
{ BFD_ECHO_PORT, "Echo" },
{ 0, NULL }
};
static const struct tok bfd_diag_values[] = {
{ 0, "No Diagnostic" },
{ 1, "Control Detection Time Expired" },
{ 2, "Echo Function Failed" },
{ 3, "Neighbor Signaled Session Down" },
{ 4, "Forwarding Plane Reset" },
{ 5, "Path Down" },
{ 6, "Concatenated Path Down" },
{ 7, "Administratively Down" },
{ 8, "Reverse Concatenated Path Down" },
{ 0, NULL }
};
static const struct tok bfd_v0_flag_values[] = {
{ 0x80, "I Hear You" },
{ 0x40, "Demand" },
{ 0x20, "Poll" },
{ 0x10, "Final" },
{ 0x08, "Reserved" },
{ 0x04, "Reserved" },
{ 0x02, "Reserved" },
{ 0x01, "Reserved" },
{ 0, NULL }
};
#define BFD_FLAG_AUTH 0x04
static const struct tok bfd_v1_flag_values[] = {
{ 0x20, "Poll" },
{ 0x10, "Final" },
{ 0x08, "Control Plane Independent" },
{ BFD_FLAG_AUTH, "Authentication Present" },
{ 0x02, "Demand" },
{ 0x01, "Reserved" },
{ 0, NULL }
};
static const struct tok bfd_v1_state_values[] = {
{ 0, "AdminDown" },
{ 1, "Down" },
{ 2, "Init" },
{ 3, "Up" },
{ 0, NULL }
};
void
bfd_print(netdissect_options *ndo, register const u_char *pptr,
register u_int len, register u_int port)
{
const struct bfd_header_t *bfd_header;
const struct bfd_auth_header_t *bfd_auth_header;
uint8_t version = 0;
bfd_header = (const struct bfd_header_t *)pptr;
if (port == BFD_CONTROL_PORT) {
ND_TCHECK(*bfd_header);
version = BFD_EXTRACT_VERSION(bfd_header->version_diag);
} else if (port == BFD_ECHO_PORT) {
/* Echo is BFD v1 only */
version = 1;
}
switch ((port << 8) | version) {
/* BFDv0 */
case (BFD_CONTROL_PORT << 8):
if (ndo->ndo_vflag < 1)
{
ND_PRINT((ndo, "BFDv%u, %s, Flags: [%s], length: %u",
version,
tok2str(bfd_port_values, "unknown (%u)", port),
bittok2str(bfd_v0_flag_values, "none", bfd_header->flags),
len));
return;
}
ND_PRINT((ndo, "BFDv%u, length: %u\n\t%s, Flags: [%s], Diagnostic: %s (0x%02x)",
version,
len,
tok2str(bfd_port_values, "unknown (%u)", port),
bittok2str(bfd_v0_flag_values, "none", bfd_header->flags),
tok2str(bfd_diag_values,"unknown",BFD_EXTRACT_DIAG(bfd_header->version_diag)),
BFD_EXTRACT_DIAG(bfd_header->version_diag)));
ND_PRINT((ndo, "\n\tDetection Timer Multiplier: %u (%u ms Detection time), BFD Length: %u",
bfd_header->detect_time_multiplier,
bfd_header->detect_time_multiplier * EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000,
bfd_header->length));
ND_PRINT((ndo, "\n\tMy Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->my_discriminator)));
ND_PRINT((ndo, ", Your Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->your_discriminator)));
ND_PRINT((ndo, "\n\t Desired min Tx Interval: %4u ms", EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000));
ND_PRINT((ndo, "\n\t Required min Rx Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_rx_interval)/1000));
ND_PRINT((ndo, "\n\t Required min Echo Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_echo_interval)/1000));
break;
/* BFDv1 */
case (BFD_CONTROL_PORT << 8 | 1):
if (ndo->ndo_vflag < 1)
{
ND_PRINT((ndo, "BFDv%u, %s, State %s, Flags: [%s], length: %u",
version,
tok2str(bfd_port_values, "unknown (%u)", port),
tok2str(bfd_v1_state_values, "unknown (%u)", (bfd_header->flags & 0xc0) >> 6),
bittok2str(bfd_v1_flag_values, "none", bfd_header->flags & 0x3f),
len));
return;
}
ND_PRINT((ndo, "BFDv%u, length: %u\n\t%s, State %s, Flags: [%s], Diagnostic: %s (0x%02x)",
version,
len,
tok2str(bfd_port_values, "unknown (%u)", port),
tok2str(bfd_v1_state_values, "unknown (%u)", (bfd_header->flags & 0xc0) >> 6),
bittok2str(bfd_v1_flag_values, "none", bfd_header->flags & 0x3f),
tok2str(bfd_diag_values,"unknown",BFD_EXTRACT_DIAG(bfd_header->version_diag)),
BFD_EXTRACT_DIAG(bfd_header->version_diag)));
ND_PRINT((ndo, "\n\tDetection Timer Multiplier: %u (%u ms Detection time), BFD Length: %u",
bfd_header->detect_time_multiplier,
bfd_header->detect_time_multiplier * EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000,
bfd_header->length));
ND_PRINT((ndo, "\n\tMy Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->my_discriminator)));
ND_PRINT((ndo, ", Your Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->your_discriminator)));
ND_PRINT((ndo, "\n\t Desired min Tx Interval: %4u ms", EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000));
ND_PRINT((ndo, "\n\t Required min Rx Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_rx_interval)/1000));
ND_PRINT((ndo, "\n\t Required min Echo Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_echo_interval)/1000));
if (bfd_header->flags & BFD_FLAG_AUTH) {
pptr += sizeof (const struct bfd_header_t);
bfd_auth_header = (const struct bfd_auth_header_t *)pptr;
ND_TCHECK2(*bfd_auth_header, sizeof(const struct bfd_auth_header_t));
ND_PRINT((ndo, "\n\t%s (%u) Authentication, length %u present",
tok2str(bfd_v1_authentication_values,"Unknown",bfd_auth_header->auth_type),
bfd_auth_header->auth_type,
bfd_auth_header->auth_len));
}
break;
/* BFDv0 */
case (BFD_ECHO_PORT << 8): /* not yet supported - fall through */
/* BFDv1 */
case (BFD_ECHO_PORT << 8 | 1):
default:
ND_PRINT((ndo, "BFD, %s, length: %u",
tok2str(bfd_port_values, "unknown (%u)", port),
len));
if (ndo->ndo_vflag >= 1) {
if(!print_unknown_data(ndo, pptr,"\n\t",len))
return;
}
break;
}
return;
trunc:
ND_PRINT((ndo, "[|BFD]"));
}
/*
* Local Variables:
* c-style: whitesmith
* c-basic-offset: 8
* End:
*/
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