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-rw-r--r--print-mpcp.c259
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diff --git a/print-mpcp.c b/print-mpcp.c
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+/*
+ * Copyright (c) 1998-2006 The TCPDUMP project
+ *
+ * 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)
+ */
+
+/* \summary: IEEE 802.3ah Multi-Point Control Protocol (MPCP) printer */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <netdissect-stdinc.h>
+
+#include "netdissect.h"
+#include "extract.h"
+
+#define MPCP_TIMESTAMP_LEN 4
+#define MPCP_TIMESTAMP_DURATION_LEN 2
+
+struct mpcp_common_header_t {
+ uint8_t opcode[2];
+ uint8_t timestamp[MPCP_TIMESTAMP_LEN];
+};
+
+#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_REG_REQ, "Register Request" },
+ { MPCP_OPCODE_REG, "Register" },
+ { MPCP_OPCODE_REG_ACK, "Register ACK" },
+ { 0, NULL}
+};
+
+#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" },
+ { 0x20, "Force Grant #2" },
+ { 0x40, "Force Grant #3" },
+ { 0x80, "Force Grant #4" },
+ { 0, NULL}
+};
+
+struct mpcp_grant_t {
+ uint8_t starttime[MPCP_TIMESTAMP_LEN];
+ uint8_t duration[MPCP_TIMESTAMP_DURATION_LEN];
+};
+
+struct mpcp_reg_req_t {
+ uint8_t flags;
+ uint8_t pending_grants;
+};
+
+
+static const struct tok mpcp_reg_req_flag_values[] = {
+ { 1, "Register" },
+ { 3, "De-Register" },
+ { 0, NULL}
+};
+
+struct mpcp_reg_t {
+ uint8_t assigned_port[2];
+ uint8_t flags;
+ uint8_t sync_time[MPCP_TIMESTAMP_DURATION_LEN];
+ uint8_t echoed_pending_grants;
+};
+
+static const struct tok mpcp_reg_flag_values[] = {
+ { 1, "Re-Register" },
+ { 2, "De-Register" },
+ { 3, "ACK" },
+ { 4, "NACK" },
+ { 0, NULL}
+};
+
+#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 {
+ uint8_t flags;
+ uint8_t echoed_assigned_port[2];
+ uint8_t echoed_sync_time[MPCP_TIMESTAMP_DURATION_LEN];
+};
+
+static const struct tok mpcp_reg_ack_flag_values[] = {
+ { 0, "NACK" },
+ { 1, "ACK" },
+ { 0, NULL}
+};
+
+void
+mpcp_print(netdissect_options *ndo, register const u_char *pptr, register u_int length)
+{
+ union {
+ const struct mpcp_common_header_t *common_header;
+ const struct mpcp_grant_t *grant;
+ const struct mpcp_reg_req_t *reg_req;
+ const struct mpcp_reg_t *reg;
+ const struct mpcp_reg_ack_t *reg_ack;
+ } mpcp;
+
+
+ const u_char *tptr;
+ uint16_t opcode;
+ uint8_t grant_numbers, grant;
+ uint8_t queue_sets, queue_set, report_bitmap, report;
+
+ tptr=pptr;
+ mpcp.common_header = (const struct mpcp_common_header_t *)pptr;
+
+ ND_TCHECK2(*tptr, sizeof(const struct mpcp_common_header_t));
+ opcode = EXTRACT_16BITS(mpcp.common_header->opcode);
+ ND_PRINT((ndo, "MPCP, Opcode %s", tok2str(mpcp_opcode_values, "Unknown (%u)", opcode)));
+ if (opcode != MPCP_OPCODE_PAUSE) {
+ ND_PRINT((ndo, ", Timestamp %u ticks", EXTRACT_32BITS(mpcp.common_header->timestamp)));
+ }
+ ND_PRINT((ndo, ", length %u", length));
+
+ if (!ndo->ndo_vflag)
+ return;
+
+ tptr += sizeof(const struct mpcp_common_header_t);
+
+ switch (opcode) {
+ case MPCP_OPCODE_PAUSE:
+ break;
+
+ case MPCP_OPCODE_GATE:
+ ND_TCHECK2(*tptr, MPCP_GRANT_NUMBER_LEN);
+ grant_numbers = *tptr & MPCP_GRANT_NUMBER_MASK;
+ ND_PRINT((ndo, "\n\tGrant Numbers %u, Flags [ %s ]",
+ grant_numbers,
+ bittok2str(mpcp_grant_flag_values,
+ "?",
+ *tptr &~ MPCP_GRANT_NUMBER_MASK)));
+ tptr++;
+
+ for (grant = 1; grant <= grant_numbers; grant++) {
+ ND_TCHECK2(*tptr, sizeof(const struct mpcp_grant_t));
+ mpcp.grant = (const struct mpcp_grant_t *)tptr;
+ ND_PRINT((ndo, "\n\tGrant #%u, Start-Time %u ticks, duration %u ticks",
+ grant,
+ EXTRACT_32BITS(mpcp.grant->starttime),
+ EXTRACT_16BITS(mpcp.grant->duration)));
+ tptr += sizeof(const struct mpcp_grant_t);
+ }
+
+ ND_TCHECK2(*tptr, MPCP_TIMESTAMP_DURATION_LEN);
+ ND_PRINT((ndo, "\n\tSync-Time %u ticks", EXTRACT_16BITS(tptr)));
+ break;
+
+
+ case MPCP_OPCODE_REPORT:
+ ND_TCHECK2(*tptr, MPCP_REPORT_QUEUESETS_LEN);
+ queue_sets = *tptr;
+ tptr+=MPCP_REPORT_QUEUESETS_LEN;
+ ND_PRINT((ndo, "\n\tTotal Queue-Sets %u", queue_sets));
+
+ for (queue_set = 1; queue_set < queue_sets; queue_set++) {
+ ND_TCHECK2(*tptr, MPCP_REPORT_REPORTBITMAP_LEN);
+ report_bitmap = *(tptr);
+ ND_PRINT((ndo, "\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_TCHECK2(*tptr, MPCP_TIMESTAMP_DURATION_LEN);
+ ND_PRINT((ndo, "\n\t Q%u Report, Duration %u ticks",
+ report,
+ EXTRACT_16BITS(tptr)));
+ tptr+=MPCP_TIMESTAMP_DURATION_LEN;
+ }
+ report++;
+ report_bitmap = report_bitmap >> 1;
+ }
+ }
+ break;
+
+ case MPCP_OPCODE_REG_REQ:
+ ND_TCHECK2(*tptr, sizeof(const struct mpcp_reg_req_t));
+ mpcp.reg_req = (const struct mpcp_reg_req_t *)tptr;
+ ND_PRINT((ndo, "\n\tFlags [ %s ], Pending-Grants %u",
+ bittok2str(mpcp_reg_req_flag_values, "Reserved", mpcp.reg_req->flags),
+ mpcp.reg_req->pending_grants));
+ break;
+
+ case MPCP_OPCODE_REG:
+ ND_TCHECK2(*tptr, sizeof(const struct mpcp_reg_t));
+ mpcp.reg = (const struct mpcp_reg_t *)tptr;
+ ND_PRINT((ndo, "\n\tAssigned-Port %u, Flags [ %s ]" \
+ "\n\tSync-Time %u ticks, Echoed-Pending-Grants %u",
+ EXTRACT_16BITS(mpcp.reg->assigned_port),
+ bittok2str(mpcp_reg_flag_values, "Reserved", mpcp.reg->flags),
+ EXTRACT_16BITS(mpcp.reg->sync_time),
+ mpcp.reg->echoed_pending_grants));
+ break;
+
+ case MPCP_OPCODE_REG_ACK:
+ ND_TCHECK2(*tptr, sizeof(const struct mpcp_reg_ack_t));
+ mpcp.reg_ack = (const struct mpcp_reg_ack_t *)tptr;
+ ND_PRINT((ndo, "\n\tEchoed-Assigned-Port %u, Flags [ %s ]" \
+ "\n\tEchoed-Sync-Time %u ticks",
+ EXTRACT_16BITS(mpcp.reg_ack->echoed_assigned_port),
+ bittok2str(mpcp_reg_ack_flag_values, "Reserved", mpcp.reg_ack->flags),
+ EXTRACT_16BITS(mpcp.reg_ack->echoed_sync_time)));
+ break;
+
+ default:
+ /* unknown opcode - hexdump for now */
+ print_unknown_data(ndo,pptr, "\n\t", length);
+ break;
+ }
+
+ return;
+
+trunc:
+ ND_PRINT((ndo, "\n\t[|MPCP]"));
+}
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 8
+ * End:
+ */
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