X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/49b23c5a9b0198bb382dcf43c458d46fcf2fa809..6c8ef0eb86a39c277d1a43802dd8ea01b51cfb2a:/print-bfd.c?ds=sidebyside diff --git a/print-bfd.c b/print-bfd.c index ad0a4065..0e766ca3 100644 --- a/print-bfd.c +++ b/print-bfd.c @@ -10,12 +10,15 @@ * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE. * - * Original code by Hannes Gredler (hannes@juniper.net) + * Original code by Hannes Gredler (hannes@gredler.at) */ /* \summary: Bidirectional Forwarding Detection (BFD) printer */ -/* specification: RFC 5880 (for version 1) and RFC 5881 */ +/* + * specification: draft-ietf-bfd-base-01 for version 0, + * RFC 5880 for version 1, and RFC 5881 + */ #ifdef HAVE_CONFIG_H #include "config.h" @@ -29,12 +32,12 @@ #include "udp.h" /* - * Control packet, BFDv0, draft-katz-ward-bfd-01.txt + * Control packet, BFDv0, draft-ietf-bfd-base-01 * * 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 | + * |Vers | Diag |H|D|P|F|C|A|Rsv| Detect Mult | Length | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | My Discriminator | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ @@ -126,12 +129,6 @@ enum auth_length { #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" }, @@ -145,20 +142,20 @@ static const struct tok bfd_diag_values[] = { { 0, NULL } }; +#define BFD_FLAG_AUTH 0x04 + static const struct tok bfd_v0_flag_values[] = { { 0x80, "I Hear You" }, { 0x40, "Demand" }, { 0x20, "Poll" }, { 0x10, "Final" }, - { 0x08, "Reserved" }, - { 0x04, "Reserved" }, + { 0x08, "Control Plane Independent" }, + { BFD_FLAG_AUTH, "Authentication Present" }, { 0x02, "Reserved" }, { 0x01, "Reserved" }, { 0, NULL } }; -#define BFD_FLAG_AUTH 0x04 - static const struct tok bfd_v1_flag_values[] = { { 0x20, "Poll" }, { 0x10, "Final" }, @@ -292,106 +289,124 @@ 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; - uint8_t version = 0; - - bfd_header = (const struct bfd_header_t *)pptr; if (port == BFD_CONTROL_PORT) { + /* + * Control packet. + */ + const struct bfd_header_t *bfd_header; + uint8_t version_diag; + uint8_t version = 0; + uint8_t flags; + + bfd_header = (const struct bfd_header_t *)pptr; 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) { + version_diag = bfd_header->version_diag; + version = BFD_EXTRACT_VERSION(version_diag); + flags = bfd_header->flags; + + switch (version) { + + /* BFDv0 */ + case 0: + if (ndo->ndo_vflag < 1) + { + ND_PRINT((ndo, "BFDv0, Control, Flags: [%s], length: %u", + bittok2str(bfd_v0_flag_values, "none", flags), + len)); + return; + } + + ND_PRINT((ndo, "BFDv0, length: %u\n\tControl, Flags: [%s], Diagnostic: %s (0x%02x)", + len, + bittok2str(bfd_v0_flag_values, "none", flags), + tok2str(bfd_diag_values,"unknown",BFD_EXTRACT_DIAG(version_diag)), + BFD_EXTRACT_DIAG(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)); - /* 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", + 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 (flags & BFD_FLAG_AUTH) { + if (auth_print(ndo, pptr)) + goto trunc; + } + break; + + /* BFDv1 */ + case 1: + if (ndo->ndo_vflag < 1) + { + ND_PRINT((ndo, "BFDv1, Control, State %s, Flags: [%s], length: %u", + tok2str(bfd_v1_state_values, "unknown (%u)", (flags & 0xc0) >> 6), + bittok2str(bfd_v1_flag_values, "none", flags & 0x3f), + len)); + return; + } + + ND_PRINT((ndo, "BFDv1, length: %u\n\tControl, State %s, Flags: [%s], Diagnostic: %s (0x%02x)", + len, + tok2str(bfd_v1_state_values, "unknown (%u)", (flags & 0xc0) >> 6), + bittok2str(bfd_v1_flag_values, "none", flags & 0x3f), + tok2str(bfd_diag_values,"unknown",BFD_EXTRACT_DIAG(version_diag)), + BFD_EXTRACT_DIAG(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 (flags & BFD_FLAG_AUTH) { + if (auth_print(ndo, pptr)) + goto trunc; + } + break; + + default: + ND_PRINT((ndo, "BFDv%u, Control, 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; + if (ndo->ndo_vflag >= 1) { + if(!print_unknown_data(ndo, pptr,"\n\t",len)) + return; + } + break; } - - 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) { - if (auth_print(ndo, pptr)) - goto trunc; + } else if (port == BFD_ECHO_PORT) { + /* + * Echo packet. + */ + ND_PRINT((ndo, "BFD, Echo, length: %u", + len)); + if (ndo->ndo_vflag >= 1) { + if(!print_unknown_data(ndo, pptr,"\n\t",len)) + return; } - 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), + } else { + /* + * Unknown packet type. + */ + ND_PRINT((ndo, "BFD, unknown (%u), length: %u", + port, len)); if (ndo->ndo_vflag >= 1) { if(!print_unknown_data(ndo, pptr,"\n\t",len)) return; } - break; } return;