X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/0860434f38178598fff25ede38436ff55ffedce5..refs/heads/coverity_scan:/print-mpcp.c diff --git a/print-mpcp.c b/print-mpcp.c index 97b5d66d..519f41b1 100644 --- a/print-mpcp.c +++ b/print-mpcp.c @@ -12,54 +12,42 @@ * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE. * - * support for the IEEE MPCP protocol as per 802.3ah - * - * Original code by Hannes Gredler (hannes@juniper.net) + * Original code by Hannes Gredler (hannes@gredler.at) */ -#ifndef lint -static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/tcpdump/print-mpcp.c,v 1.1 2006-02-10 04:52:25 hannes Exp $"; -#endif - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif +/* \summary: IEEE 802.3ah Multi-Point Control Protocol (MPCP) printer */ -#include +#include -#include -#include -#include +#include "netdissect-stdinc.h" -#include "interface.h" +#include "netdissect.h" #include "extract.h" -#include "addrtoname.h" -#include "ether.h" struct mpcp_common_header_t { - u_int8_t opcode[2]; - u_int8_t timestamp[4]; + nd_uint16_t opcode; + nd_uint32_t timestamp; }; -#define MPCP_OPCODE_PAUSE 0x0001 -#define MPCP_OPCODE_GATE 0x0002 -#define MPCP_OPCODE_REPORT 0x0003 -#define MPCP_OPCODE_REGISTER_REQ 0x0004 -#define MPCP_OPCODE_REGISTER 0x0005 -#define MPCP_OPCODE_REGISTER_ACK 0x0006 +#define MPCP_OPCODE_PAUSE 0x0001 +#define MPCP_OPCODE_GATE 0x0002 +#define MPCP_OPCODE_REPORT 0x0003 +#define MPCP_OPCODE_REG_REQ 0x0004 +#define MPCP_OPCODE_REG 0x0005 +#define MPCP_OPCODE_REG_ACK 0x0006 static const struct tok mpcp_opcode_values[] = { { MPCP_OPCODE_PAUSE, "Pause" }, { MPCP_OPCODE_GATE, "Gate" }, { MPCP_OPCODE_REPORT, "Report" }, - { MPCP_OPCODE_REGISTER_REQ, "Register Request" }, - { MPCP_OPCODE_REGISTER, "Register" }, - { MPCP_OPCODE_REGISTER_ACK, "Register ACK" }, + { MPCP_OPCODE_REG_REQ, "Register Request" }, + { MPCP_OPCODE_REG, "Register" }, + { MPCP_OPCODE_REG_ACK, "Register ACK" }, { 0, NULL} }; -#define MPCP_GRANT_NUMBER_MASK 0x7 +#define MPCP_GRANT_NUMBER_LEN 1 +#define MPCP_GRANT_NUMBER_MASK 0x7 static const struct tok mpcp_grant_flag_values[] = { { 0x08, "Discovery" }, { 0x10, "Force Grant #1" }, @@ -70,17 +58,30 @@ static const struct tok mpcp_grant_flag_values[] = { }; struct mpcp_grant_t { - u_int8_t starttime[4]; - u_int8_t length[2]; + nd_uint32_t starttime; + nd_uint16_t duration; +}; + +struct mpcp_reg_req_t { + nd_uint8_t flags; + nd_uint8_t pending_grants; }; -static const struct tok mpcp_register_req_flag_values[] = { + +static const struct tok mpcp_reg_req_flag_values[] = { { 1, "Register" }, { 3, "De-Register" }, { 0, NULL} }; -static const struct tok mpcp_register_flag_values[] = { +struct mpcp_reg_t { + nd_uint16_t assigned_port; + nd_uint8_t flags; + nd_uint16_t sync_time; + nd_uint8_t echoed_pending_grants; +}; + +static const struct tok mpcp_reg_flag_values[] = { { 1, "Re-Register" }, { 2, "De-Register" }, { 3, "ACK" }, @@ -88,77 +89,145 @@ static const struct tok mpcp_register_flag_values[] = { { 0, NULL} }; -static const struct tok mpcp_register_ack_flag_values[] = { +#define MPCP_REPORT_QUEUESETS_LEN 1 +#define MPCP_REPORT_REPORTBITMAP_LEN 1 +static const struct tok mpcp_report_bitmap_values[] = { + { 0x01, "Q0" }, + { 0x02, "Q1" }, + { 0x04, "Q2" }, + { 0x08, "Q3" }, + { 0x10, "Q4" }, + { 0x20, "Q5" }, + { 0x40, "Q6" }, + { 0x80, "Q7" }, + { 0, NULL} +}; + +struct mpcp_reg_ack_t { + nd_uint8_t flags; + nd_uint16_t echoed_assigned_port; + nd_uint16_t echoed_sync_time; +}; + +static const struct tok mpcp_reg_ack_flag_values[] = { { 0, "NACK" }, { 1, "ACK" }, { 0, NULL} }; void -mpcp_print(register const u_char *pptr, register u_int length) { - - union { - const struct mpcp_common_header_t *common_header; - const struct mpcp_grant_t *grant; - } mpcp; +mpcp_print(netdissect_options *ndo, const u_char *pptr, u_int length) +{ + const struct mpcp_common_header_t *mpcp_common_header; + const struct mpcp_reg_req_t *mpcp_reg_req; + const struct mpcp_reg_t *mpcp_reg; + const struct mpcp_reg_ack_t *mpcp_reg_ack; const u_char *tptr; - u_int16_t opcode; - u_int8_t grant_numbers, grant; + uint16_t opcode; + uint32_t timestamp; + uint8_t grant_numbers, grant; + uint8_t queue_sets, queue_set, report_bitmap, report; + ndo->ndo_protocol = "mpcp"; tptr=pptr; - mpcp.common_header = (const struct mpcp_common_header_t *)pptr; - TCHECK(*mpcp.common_header); + mpcp_common_header = (const struct mpcp_common_header_t *)pptr; - opcode = EXTRACT_16BITS(mpcp.common_header->opcode); - - printf("MPCP, Opcode %s", tok2str(mpcp_opcode_values, "Unknown (%u)", opcode)); + opcode = GET_BE_U_2(mpcp_common_header->opcode); + timestamp = GET_BE_U_4(mpcp_common_header->timestamp); + ND_PRINT("MPCP, Opcode %s", tok2str(mpcp_opcode_values, "Unknown (%u)", opcode)); if (opcode != MPCP_OPCODE_PAUSE) { - printf(", Timestamp %u", EXTRACT_32BITS(mpcp.common_header->timestamp)); + ND_PRINT(", Timestamp %u ticks", timestamp); } - printf(", length %u", length); + ND_PRINT(", length %u", length); - if (!vflag) + if (!ndo->ndo_vflag) return; - tptr += sizeof(const struct mpcp_common_header_t); + tptr += sizeof(struct mpcp_common_header_t); switch (opcode) { case MPCP_OPCODE_PAUSE: break; case MPCP_OPCODE_GATE: - grant_numbers = *tptr & MPCP_GRANT_NUMBER_MASK; - printf("\n\tGrant Numbers %u, Flags [ %s ]", + grant_numbers = GET_U_1(tptr) & MPCP_GRANT_NUMBER_MASK; + ND_PRINT("\n\tGrant Numbers %u, Flags [ %s ]", grant_numbers, bittok2str(mpcp_grant_flag_values, "?", - *tptr &~ MPCP_GRANT_NUMBER_MASK)); + GET_U_1(tptr) & ~MPCP_GRANT_NUMBER_MASK)); tptr++; for (grant = 1; grant <= grant_numbers; grant++) { - mpcp.grant = (const struct mpcp_grant_t *)tptr; - printf("\n\tGrant #%u, Start-Time %u, length %u", + const struct mpcp_grant_t *mpcp_grant = (const struct mpcp_grant_t *)tptr; + ND_PRINT("\n\tGrant #%u, Start-Time %u ticks, duration %u ticks", grant, - EXTRACT_32BITS(mpcp.grant->starttime), - EXTRACT_16BITS(mpcp.grant->length)); - tptr += sizeof(const struct mpcp_grant_t); + GET_BE_U_4(mpcp_grant->starttime), + GET_BE_U_2(mpcp_grant->duration)); + tptr += sizeof(struct mpcp_grant_t); } - printf("\n\tSync-Time %u", EXTRACT_16BITS(tptr)); + ND_PRINT("\n\tSync-Time %u ticks", GET_BE_U_2(tptr)); break; - /* FIXME */ + case MPCP_OPCODE_REPORT: - case MPCP_OPCODE_REGISTER_REQ: - case MPCP_OPCODE_REGISTER: - case MPCP_OPCODE_REGISTER_ACK: + queue_sets = GET_U_1(tptr); + tptr+=MPCP_REPORT_QUEUESETS_LEN; + ND_PRINT("\n\tTotal Queue-Sets %u", queue_sets); + + for (queue_set = 1; queue_set < queue_sets; queue_set++) { + report_bitmap = GET_U_1(tptr); + ND_PRINT("\n\t Queue-Set #%u, Report-Bitmap [ %s ]", + queue_sets, + bittok2str(mpcp_report_bitmap_values, "Unknown", report_bitmap)); + tptr++; + + report=1; + while (report_bitmap != 0) { + if (report_bitmap & 1) { + ND_PRINT("\n\t Q%u Report, Duration %u ticks", + report, + GET_BE_U_2(tptr)); + tptr += 2; + } + report++; + report_bitmap = report_bitmap >> 1; + } + } + break; + + case MPCP_OPCODE_REG_REQ: + mpcp_reg_req = (const struct mpcp_reg_req_t *)tptr; + ND_PRINT("\n\tFlags [ %s ], Pending-Grants %u", + bittok2str(mpcp_reg_req_flag_values, "Reserved", GET_U_1(mpcp_reg_req->flags)), + GET_U_1(mpcp_reg_req->pending_grants)); + break; + + case MPCP_OPCODE_REG: + mpcp_reg = (const struct mpcp_reg_t *)tptr; + ND_PRINT("\n\tAssigned-Port %u, Flags [ %s ]" + "\n\tSync-Time %u ticks, Echoed-Pending-Grants %u", + GET_BE_U_2(mpcp_reg->assigned_port), + bittok2str(mpcp_reg_flag_values, "Reserved", GET_U_1(mpcp_reg->flags)), + GET_BE_U_2(mpcp_reg->sync_time), + GET_U_1(mpcp_reg->echoed_pending_grants)); + break; + + case MPCP_OPCODE_REG_ACK: + mpcp_reg_ack = (const struct mpcp_reg_ack_t *)tptr; + ND_PRINT("\n\tEchoed-Assigned-Port %u, Flags [ %s ]" + "\n\tEchoed-Sync-Time %u ticks", + GET_BE_U_2(mpcp_reg_ack->echoed_assigned_port), + bittok2str(mpcp_reg_ack_flag_values, "Reserved", GET_U_1(mpcp_reg_ack->flags)), + GET_BE_U_2(mpcp_reg_ack->echoed_sync_time)); + break; + default: + /* unknown opcode - hexdump for now */ + print_unknown_data(ndo,pptr, "\n\t", length); break; } - - return; -trunc: - printf("\n\t[|MPCP]"); }