2 * Copyright (c) 1998-2006 The TCPDUMP project
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that: (1) source code
6 * distributions retain the above copyright notice and this paragraph
7 * in its entirety, and (2) distributions including binary code include
8 * the above copyright notice and this paragraph in its entirety in
9 * the documentation or other materials provided with the distribution.
10 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
11 * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
12 * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
13 * FOR A PARTICULAR PURPOSE.
15 * Original code by Hannes Gredler (hannes@gredler.at)
18 /* \summary: IEEE 802.3ah Multi-Point Control Protocol (MPCP) printer */
24 #include "netdissect-stdinc.h"
26 #include "netdissect.h"
29 struct mpcp_common_header_t {
31 nd_uint32_t timestamp;
34 #define MPCP_OPCODE_PAUSE 0x0001
35 #define MPCP_OPCODE_GATE 0x0002
36 #define MPCP_OPCODE_REPORT 0x0003
37 #define MPCP_OPCODE_REG_REQ 0x0004
38 #define MPCP_OPCODE_REG 0x0005
39 #define MPCP_OPCODE_REG_ACK 0x0006
41 static const struct tok mpcp_opcode_values[] = {
42 { MPCP_OPCODE_PAUSE, "Pause" },
43 { MPCP_OPCODE_GATE, "Gate" },
44 { MPCP_OPCODE_REPORT, "Report" },
45 { MPCP_OPCODE_REG_REQ, "Register Request" },
46 { MPCP_OPCODE_REG, "Register" },
47 { MPCP_OPCODE_REG_ACK, "Register ACK" },
51 #define MPCP_GRANT_NUMBER_LEN 1
52 #define MPCP_GRANT_NUMBER_MASK 0x7
53 static const struct tok mpcp_grant_flag_values[] = {
54 { 0x08, "Discovery" },
55 { 0x10, "Force Grant #1" },
56 { 0x20, "Force Grant #2" },
57 { 0x40, "Force Grant #3" },
58 { 0x80, "Force Grant #4" },
63 nd_uint32_t starttime;
67 struct mpcp_reg_req_t {
69 nd_uint8_t pending_grants;
73 static const struct tok mpcp_reg_req_flag_values[] = {
80 nd_uint16_t assigned_port;
82 nd_uint16_t sync_time;
83 nd_uint8_t echoed_pending_grants;
86 static const struct tok mpcp_reg_flag_values[] = {
94 #define MPCP_REPORT_QUEUESETS_LEN 1
95 #define MPCP_REPORT_REPORTBITMAP_LEN 1
96 static const struct tok mpcp_report_bitmap_values[] = {
108 struct mpcp_reg_ack_t {
110 nd_uint16_t echoed_assigned_port;
111 nd_uint16_t echoed_sync_time;
114 static const struct tok mpcp_reg_ack_flag_values[] = {
121 mpcp_print(netdissect_options *ndo, const u_char *pptr, u_int length)
123 const struct mpcp_common_header_t *mpcp_common_header;
124 const struct mpcp_reg_req_t *mpcp_reg_req;
125 const struct mpcp_reg_t *mpcp_reg;
126 const struct mpcp_reg_ack_t *mpcp_reg_ack;
132 uint8_t grant_numbers, grant;
133 uint8_t queue_sets, queue_set, report_bitmap, report;
135 ndo->ndo_protocol = "mpcp";
137 mpcp_common_header = (const struct mpcp_common_header_t *)pptr;
139 opcode = GET_BE_U_2(mpcp_common_header->opcode);
140 timestamp = GET_BE_U_4(mpcp_common_header->timestamp);
141 ND_PRINT("MPCP, Opcode %s", tok2str(mpcp_opcode_values, "Unknown (%u)", opcode));
142 if (opcode != MPCP_OPCODE_PAUSE) {
143 ND_PRINT(", Timestamp %u ticks", timestamp);
145 ND_PRINT(", length %u", length);
150 tptr += sizeof(struct mpcp_common_header_t);
153 case MPCP_OPCODE_PAUSE:
156 case MPCP_OPCODE_GATE:
157 grant_numbers = GET_U_1(tptr) & MPCP_GRANT_NUMBER_MASK;
158 ND_PRINT("\n\tGrant Numbers %u, Flags [ %s ]",
160 bittok2str(mpcp_grant_flag_values,
162 GET_U_1(tptr) & ~MPCP_GRANT_NUMBER_MASK));
165 for (grant = 1; grant <= grant_numbers; grant++) {
166 const struct mpcp_grant_t *mpcp_grant = (const struct mpcp_grant_t *)tptr;
167 ND_PRINT("\n\tGrant #%u, Start-Time %u ticks, duration %u ticks",
169 GET_BE_U_4(mpcp_grant->starttime),
170 GET_BE_U_2(mpcp_grant->duration));
171 tptr += sizeof(struct mpcp_grant_t);
174 ND_PRINT("\n\tSync-Time %u ticks", GET_BE_U_2(tptr));
178 case MPCP_OPCODE_REPORT:
179 queue_sets = GET_U_1(tptr);
180 tptr+=MPCP_REPORT_QUEUESETS_LEN;
181 ND_PRINT("\n\tTotal Queue-Sets %u", queue_sets);
183 for (queue_set = 1; queue_set < queue_sets; queue_set++) {
184 report_bitmap = GET_U_1(tptr);
185 ND_PRINT("\n\t Queue-Set #%u, Report-Bitmap [ %s ]",
187 bittok2str(mpcp_report_bitmap_values, "Unknown", report_bitmap));
191 while (report_bitmap != 0) {
192 if (report_bitmap & 1) {
193 ND_PRINT("\n\t Q%u Report, Duration %u ticks",
199 report_bitmap = report_bitmap >> 1;
204 case MPCP_OPCODE_REG_REQ:
205 mpcp_reg_req = (const struct mpcp_reg_req_t *)tptr;
206 ND_PRINT("\n\tFlags [ %s ], Pending-Grants %u",
207 bittok2str(mpcp_reg_req_flag_values, "Reserved", GET_U_1(mpcp_reg_req->flags)),
208 GET_U_1(mpcp_reg_req->pending_grants));
211 case MPCP_OPCODE_REG:
212 mpcp_reg = (const struct mpcp_reg_t *)tptr;
213 ND_PRINT("\n\tAssigned-Port %u, Flags [ %s ]"
214 "\n\tSync-Time %u ticks, Echoed-Pending-Grants %u",
215 GET_BE_U_2(mpcp_reg->assigned_port),
216 bittok2str(mpcp_reg_flag_values, "Reserved", GET_U_1(mpcp_reg->flags)),
217 GET_BE_U_2(mpcp_reg->sync_time),
218 GET_U_1(mpcp_reg->echoed_pending_grants));
221 case MPCP_OPCODE_REG_ACK:
222 mpcp_reg_ack = (const struct mpcp_reg_ack_t *)tptr;
223 ND_PRINT("\n\tEchoed-Assigned-Port %u, Flags [ %s ]"
224 "\n\tEchoed-Sync-Time %u ticks",
225 GET_BE_U_2(mpcp_reg_ack->echoed_assigned_port),
226 bittok2str(mpcp_reg_ack_flag_values, "Reserved", GET_U_1(mpcp_reg_ack->flags)),
227 GET_BE_U_2(mpcp_reg_ack->echoed_sync_time));
231 /* unknown opcode - hexdump for now */
232 print_unknown_data(ndo,pptr, "\n\t", length);