diff options
Diffstat (limited to 'contrib/tcpdump/print-bfd.c')
| -rw-r--r-- | contrib/tcpdump/print-bfd.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-bfd.c b/contrib/tcpdump/print-bfd.c new file mode 100644 index 0000000..2c6aec4 --- /dev/null +++ b/contrib/tcpdump/print-bfd.c @@ -0,0 +1,160 @@ +/* + * 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) + */ + +#ifndef lint +static const char rcsid[] _U_ = + "@(#) $Header: /tcpdump/master/tcpdump/print-bfd.c,v 1.3.2.2 2003/11/16 08:51:12 guy Exp $"; +#endif + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <tcpdump-stdinc.h> + +#include <stdio.h> +#include <stdlib.h> + +#include "interface.h" +#include "extract.h" +#include "addrtoname.h" + +#include "udp.h" + +/* + * Control packet, 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 | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + */ + +struct bfd_header_t { + u_int8_t version_diag; + u_int8_t flags; + u_int8_t detect_time_multiplier; + u_int8_t length; + u_int8_t my_discriminator[4]; + u_int8_t your_discriminator[4]; + u_int8_t desired_min_tx_interval[4]; + u_int8_t required_min_rx_interval[4]; + u_int8_t required_min_echo_interval[4]; +}; + +#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" }, + { 0, NULL } +}; + +static const struct tok bfd_flag_values[] = { + { 0x80, "I Hear You" }, + { 0x40, "Demand" }, + { 0x20, "Poll" }, + { 0x10, "Final" }, + { 0x08, "Reserved" }, + { 0x04, "Reserved" }, + { 0x02, "Reserved" }, + { 0x01, "Reserved" }, + { 0, NULL } +}; + +void +bfd_print(register const u_char *pptr, register u_int len, register u_int port) +{ + const struct bfd_header_t *bfd_header; + + bfd_header = (const struct bfd_header_t *)pptr; + TCHECK(*bfd_header); + + switch (port) { + + case BFD_CONTROL_PORT: + if (vflag < 1 ) + { + printf("BFDv%u, %s, Flags: [%s], length: %u", + BFD_EXTRACT_VERSION(bfd_header->version_diag), + tok2str(bfd_port_values, "unknown (%u)", port), + bittok2str(bfd_flag_values, "none", bfd_header->flags), + len); + return; + } + + printf("BFDv%u, length: %u\n\t%s, Flags: [%s], Diagnostic: %s (0x%02x)", + BFD_EXTRACT_VERSION(bfd_header->version_diag), + len, + tok2str(bfd_port_values, "unknown (%u)", port), + bittok2str(bfd_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)); + + printf("\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); + + + printf("\n\tMy Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->my_discriminator)); + printf(", Your Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->your_discriminator)); + printf("\n\t Desired min Tx Interval: %4u ms", EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000); + printf("\n\t Required min Rx Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_rx_interval)/1000); + printf("\n\t Required min Echo Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_echo_interval)/1000); + break; + + case BFD_ECHO_PORT: /* not yet supported - fall through */ + + default: + printf("BFD, %s, length: %u", + tok2str(bfd_port_values, "unknown (%u)", port), + len); + if (vflag >= 1) { + if(!print_unknown_data(pptr,"\n\t",len)) + return; + } + break; + } + return; + +trunc: + printf("[|BFD]"); +} |
