161 lines
5.7 KiB
C
161 lines
5.7 KiB
C
/*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code
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* distributions retain the above copyright notice and this paragraph
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* in its entirety, and (2) distributions including binary code include
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* the above copyright notice and this paragraph in its entirety in
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* the documentation or other materials provided with the distribution.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND
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* WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
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* LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE.
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*
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* Original code by Hannes Gredler (hannes@juniper.net)
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*/
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#ifndef lint
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static const char rcsid[] _U_ =
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"@(#) $Header: /tcpdump/master/tcpdump/print-bfd.c,v 1.3.2.2 2003/11/16 08:51:12 guy Exp $";
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#endif
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <tcpdump-stdinc.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "interface.h"
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#include "extract.h"
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#include "addrtoname.h"
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#include "udp.h"
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/*
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* Control packet, draft-katz-ward-bfd-01.txt
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*
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* 0 1 2 3
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* 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
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* |Vers | Diag |H|D|P|F| Rsvd | Detect Mult | Length |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | My Discriminator |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Your Discriminator |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Desired Min TX Interval |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Required Min RX Interval |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Required Min Echo RX Interval |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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struct bfd_header_t {
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u_int8_t version_diag;
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u_int8_t flags;
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u_int8_t detect_time_multiplier;
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u_int8_t length;
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u_int8_t my_discriminator[4];
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u_int8_t your_discriminator[4];
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u_int8_t desired_min_tx_interval[4];
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u_int8_t required_min_rx_interval[4];
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u_int8_t required_min_echo_interval[4];
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};
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#define BFD_EXTRACT_VERSION(x) (((x)&0xe0)>>5)
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#define BFD_EXTRACT_DIAG(x) ((x)&0x1f)
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static const struct tok bfd_port_values[] = {
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{ BFD_CONTROL_PORT, "Control" },
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{ BFD_ECHO_PORT, "Echo" },
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{ 0, NULL }
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};
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static const struct tok bfd_diag_values[] = {
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{ 0, "No Diagnostic" },
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{ 1, "Control Detection Time Expired" },
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{ 2, "Echo Function Failed" },
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{ 3, "Neighbor Signaled Session Down" },
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{ 4, "Forwarding Plane Reset" },
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{ 5, "Path Down" },
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{ 6, "Concatenated Path Down" },
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{ 7, "Administratively Down" },
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{ 0, NULL }
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};
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static const struct tok bfd_flag_values[] = {
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{ 0x80, "I Hear You" },
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{ 0x40, "Demand" },
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{ 0x20, "Poll" },
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{ 0x10, "Final" },
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{ 0x08, "Reserved" },
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{ 0x04, "Reserved" },
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{ 0x02, "Reserved" },
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{ 0x01, "Reserved" },
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{ 0, NULL }
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};
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void
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bfd_print(register const u_char *pptr, register u_int len, register u_int port)
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{
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const struct bfd_header_t *bfd_header;
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bfd_header = (const struct bfd_header_t *)pptr;
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TCHECK(*bfd_header);
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switch (port) {
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case BFD_CONTROL_PORT:
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if (vflag < 1 )
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{
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printf("BFDv%u, %s, Flags: [%s], length: %u",
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BFD_EXTRACT_VERSION(bfd_header->version_diag),
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tok2str(bfd_port_values, "unknown (%u)", port),
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bittok2str(bfd_flag_values, "none", bfd_header->flags),
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len);
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return;
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}
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printf("BFDv%u, length: %u\n\t%s, Flags: [%s], Diagnostic: %s (0x%02x)",
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BFD_EXTRACT_VERSION(bfd_header->version_diag),
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len,
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tok2str(bfd_port_values, "unknown (%u)", port),
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bittok2str(bfd_flag_values, "none", bfd_header->flags),
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tok2str(bfd_diag_values,"unknown",BFD_EXTRACT_DIAG(bfd_header->version_diag)),
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BFD_EXTRACT_DIAG(bfd_header->version_diag));
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printf("\n\tDetection Timer Multiplier: %u (%u ms Detection time), BFD Length: %u",
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bfd_header->detect_time_multiplier,
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bfd_header->detect_time_multiplier * EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000,
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bfd_header->length);
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printf("\n\tMy Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->my_discriminator));
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printf(", Your Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->your_discriminator));
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printf("\n\t Desired min Tx Interval: %4u ms", EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000);
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printf("\n\t Required min Rx Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_rx_interval)/1000);
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printf("\n\t Required min Echo Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_echo_interval)/1000);
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break;
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case BFD_ECHO_PORT: /* not yet supported - fall through */
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default:
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printf("BFD, %s, length: %u",
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tok2str(bfd_port_values, "unknown (%u)", port),
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len);
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if (vflag >= 1) {
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if(!print_unknown_data(pptr,"\n\t",len))
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return;
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}
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break;
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}
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return;
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trunc:
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printf("[|BFD]");
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}
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