JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 1998-2006 The TCPDUMP project |
| 3 | * |
| 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. |
| 14 | * |
| 15 | * support for the IEEE MPCP protocol as per 802.3ah |
| 16 | * |
| 17 | * Original code by Hannes Gredler (hannes@juniper.net) |
| 18 | */ |
| 19 | |
| 20 | #ifndef lint |
| 21 | static const char rcsid[] _U_ = |
| 22 | "@(#) $Header: /tcpdump/master/tcpdump/print-mpcp.c,v 1.2 2006-02-10 17:24:55 hannes Exp $"; |
| 23 | #endif |
| 24 | |
| 25 | #ifdef HAVE_CONFIG_H |
| 26 | #include "config.h" |
| 27 | #endif |
| 28 | |
| 29 | #include <tcpdump-stdinc.h> |
| 30 | |
| 31 | #include <stdio.h> |
| 32 | #include <stdlib.h> |
| 33 | #include <string.h> |
| 34 | |
| 35 | #include "interface.h" |
| 36 | #include "extract.h" |
| 37 | #include "addrtoname.h" |
| 38 | #include "ether.h" |
| 39 | |
| 40 | #define MPCP_TIMESTAMP_LEN 4 |
| 41 | #define MPCP_TIMESTAMP_DURATION_LEN 2 |
| 42 | |
| 43 | struct mpcp_common_header_t { |
| 44 | u_int8_t opcode[2]; |
| 45 | u_int8_t timestamp[MPCP_TIMESTAMP_LEN]; |
| 46 | }; |
| 47 | |
| 48 | #define MPCP_OPCODE_PAUSE 0x0001 |
| 49 | #define MPCP_OPCODE_GATE 0x0002 |
| 50 | #define MPCP_OPCODE_REPORT 0x0003 |
| 51 | #define MPCP_OPCODE_REG_REQ 0x0004 |
| 52 | #define MPCP_OPCODE_REG 0x0005 |
| 53 | #define MPCP_OPCODE_REG_ACK 0x0006 |
| 54 | |
| 55 | static const struct tok mpcp_opcode_values[] = { |
| 56 | { MPCP_OPCODE_PAUSE, "Pause" }, |
| 57 | { MPCP_OPCODE_GATE, "Gate" }, |
| 58 | { MPCP_OPCODE_REPORT, "Report" }, |
| 59 | { MPCP_OPCODE_REG_REQ, "Register Request" }, |
| 60 | { MPCP_OPCODE_REG, "Register" }, |
| 61 | { MPCP_OPCODE_REG_ACK, "Register ACK" }, |
| 62 | { 0, NULL} |
| 63 | }; |
| 64 | |
| 65 | #define MPCP_GRANT_NUMBER_LEN 1 |
| 66 | #define MPCP_GRANT_NUMBER_MASK 0x7 |
| 67 | static const struct tok mpcp_grant_flag_values[] = { |
| 68 | { 0x08, "Discovery" }, |
| 69 | { 0x10, "Force Grant #1" }, |
| 70 | { 0x20, "Force Grant #2" }, |
| 71 | { 0x40, "Force Grant #3" }, |
| 72 | { 0x80, "Force Grant #4" }, |
| 73 | { 0, NULL} |
| 74 | }; |
| 75 | |
| 76 | struct mpcp_grant_t { |
| 77 | u_int8_t starttime[MPCP_TIMESTAMP_LEN]; |
| 78 | u_int8_t duration[MPCP_TIMESTAMP_DURATION_LEN]; |
| 79 | }; |
| 80 | |
| 81 | struct mpcp_reg_req_t { |
| 82 | u_int8_t flags; |
| 83 | u_int8_t pending_grants; |
| 84 | }; |
| 85 | |
| 86 | |
| 87 | static const struct tok mpcp_reg_req_flag_values[] = { |
| 88 | { 1, "Register" }, |
| 89 | { 3, "De-Register" }, |
| 90 | { 0, NULL} |
| 91 | }; |
| 92 | |
| 93 | struct mpcp_reg_t { |
| 94 | u_int8_t assigned_port[2]; |
| 95 | u_int8_t flags; |
| 96 | u_int8_t sync_time[MPCP_TIMESTAMP_DURATION_LEN]; |
| 97 | u_int8_t echoed_pending_grants; |
| 98 | }; |
| 99 | |
| 100 | static const struct tok mpcp_reg_flag_values[] = { |
| 101 | { 1, "Re-Register" }, |
| 102 | { 2, "De-Register" }, |
| 103 | { 3, "ACK" }, |
| 104 | { 4, "NACK" }, |
| 105 | { 0, NULL} |
| 106 | }; |
| 107 | |
| 108 | #define MPCP_REPORT_QUEUESETS_LEN 1 |
| 109 | #define MPCP_REPORT_REPORTBITMAP_LEN 1 |
| 110 | static const struct tok mpcp_report_bitmap_values[] = { |
| 111 | { 0x01, "Q0" }, |
| 112 | { 0x02, "Q1" }, |
| 113 | { 0x04, "Q2" }, |
| 114 | { 0x08, "Q3" }, |
| 115 | { 0x10, "Q4" }, |
| 116 | { 0x20, "Q5" }, |
| 117 | { 0x40, "Q6" }, |
| 118 | { 0x80, "Q7" }, |
| 119 | { 0, NULL} |
| 120 | }; |
| 121 | |
| 122 | struct mpcp_reg_ack_t { |
| 123 | u_int8_t flags; |
| 124 | u_int8_t echoed_assigned_port[2]; |
| 125 | u_int8_t echoed_sync_time[MPCP_TIMESTAMP_DURATION_LEN]; |
| 126 | }; |
| 127 | |
| 128 | static const struct tok mpcp_reg_ack_flag_values[] = { |
| 129 | { 0, "NACK" }, |
| 130 | { 1, "ACK" }, |
| 131 | { 0, NULL} |
| 132 | }; |
| 133 | |
| 134 | void |
| 135 | mpcp_print(register const u_char *pptr, register u_int length) { |
| 136 | |
| 137 | union { |
| 138 | const struct mpcp_common_header_t *common_header; |
| 139 | const struct mpcp_grant_t *grant; |
| 140 | const struct mpcp_reg_req_t *reg_req; |
| 141 | const struct mpcp_reg_t *reg; |
| 142 | const struct mpcp_reg_ack_t *reg_ack; |
| 143 | } mpcp; |
| 144 | |
| 145 | |
| 146 | const u_char *tptr; |
| 147 | u_int16_t opcode; |
| 148 | u_int8_t grant_numbers, grant; |
| 149 | u_int8_t queue_sets, queue_set, report_bitmap, report; |
| 150 | |
| 151 | tptr=pptr; |
| 152 | mpcp.common_header = (const struct mpcp_common_header_t *)pptr; |
| 153 | |
| 154 | if (!TTEST2(*tptr, sizeof(const struct mpcp_common_header_t))) |
| 155 | goto trunc; |
| 156 | opcode = EXTRACT_16BITS(mpcp.common_header->opcode); |
| 157 | printf("MPCP, Opcode %s", tok2str(mpcp_opcode_values, "Unknown (%u)", opcode)); |
| 158 | if (opcode != MPCP_OPCODE_PAUSE) { |
| 159 | printf(", Timestamp %u ticks", EXTRACT_32BITS(mpcp.common_header->timestamp)); |
| 160 | } |
| 161 | printf(", length %u", length); |
| 162 | |
| 163 | if (!vflag) |
| 164 | return; |
| 165 | |
| 166 | tptr += sizeof(const struct mpcp_common_header_t); |
| 167 | |
| 168 | switch (opcode) { |
| 169 | case MPCP_OPCODE_PAUSE: |
| 170 | break; |
| 171 | |
| 172 | case MPCP_OPCODE_GATE: |
| 173 | if (!TTEST2(*tptr, MPCP_GRANT_NUMBER_LEN)) |
| 174 | goto trunc; |
| 175 | grant_numbers = *tptr & MPCP_GRANT_NUMBER_MASK; |
| 176 | printf("\n\tGrant Numbers %u, Flags [ %s ]", |
| 177 | grant_numbers, |
| 178 | bittok2str(mpcp_grant_flag_values, |
| 179 | "?", |
| 180 | *tptr &~ MPCP_GRANT_NUMBER_MASK)); |
| 181 | tptr++; |
| 182 | |
| 183 | for (grant = 1; grant <= grant_numbers; grant++) { |
| 184 | if (!TTEST2(*tptr, sizeof(const struct mpcp_grant_t))) |
| 185 | goto trunc; |
| 186 | mpcp.grant = (const struct mpcp_grant_t *)tptr; |
| 187 | printf("\n\tGrant #%u, Start-Time %u ticks, duration %u ticks", |
| 188 | grant, |
| 189 | EXTRACT_32BITS(mpcp.grant->starttime), |
| 190 | EXTRACT_16BITS(mpcp.grant->duration)); |
| 191 | tptr += sizeof(const struct mpcp_grant_t); |
| 192 | } |
| 193 | |
| 194 | if (!TTEST2(*tptr, MPCP_TIMESTAMP_DURATION_LEN)) |
| 195 | goto trunc; |
| 196 | printf("\n\tSync-Time %u ticks", EXTRACT_16BITS(tptr)); |
| 197 | break; |
| 198 | |
| 199 | |
| 200 | case MPCP_OPCODE_REPORT: |
| 201 | if (!TTEST2(*tptr, MPCP_REPORT_QUEUESETS_LEN)) |
| 202 | goto trunc; |
| 203 | queue_sets = *tptr; |
| 204 | tptr+=MPCP_REPORT_QUEUESETS_LEN; |
| 205 | printf("\n\tTotal Queue-Sets %u", queue_sets); |
| 206 | |
| 207 | for (queue_set = 1; queue_set < queue_sets; queue_set++) { |
| 208 | if (!TTEST2(*tptr, MPCP_REPORT_REPORTBITMAP_LEN)) |
| 209 | goto trunc; |
| 210 | report_bitmap = *(tptr); |
| 211 | printf("\n\t Queue-Set #%u, Report-Bitmap [ %s ]", |
| 212 | queue_sets, |
| 213 | bittok2str(mpcp_report_bitmap_values, "Unknown", report_bitmap)); |
| 214 | tptr++; |
| 215 | |
| 216 | report=1; |
| 217 | while (report_bitmap != 0) { |
| 218 | if (report_bitmap & 1) { |
| 219 | if (!TTEST2(*tptr, MPCP_TIMESTAMP_DURATION_LEN)) |
| 220 | goto trunc; |
| 221 | printf("\n\t Q%u Report, Duration %u ticks", |
| 222 | report, |
| 223 | EXTRACT_16BITS(tptr)); |
| 224 | tptr+=MPCP_TIMESTAMP_DURATION_LEN; |
| 225 | } |
| 226 | report++; |
| 227 | report_bitmap = report_bitmap >> 1; |
| 228 | } |
| 229 | } |
| 230 | break; |
| 231 | |
| 232 | case MPCP_OPCODE_REG_REQ: |
| 233 | if (!TTEST2(*tptr, sizeof(const struct mpcp_reg_req_t))) |
| 234 | goto trunc; |
| 235 | mpcp.reg_req = (const struct mpcp_reg_req_t *)tptr; |
| 236 | printf("\n\tFlags [ %s ], Pending-Grants %u", |
| 237 | bittok2str(mpcp_reg_req_flag_values, "Reserved", mpcp.reg_req->flags), |
| 238 | mpcp.reg_req->pending_grants); |
| 239 | break; |
| 240 | |
| 241 | case MPCP_OPCODE_REG: |
| 242 | if (!TTEST2(*tptr, sizeof(const struct mpcp_reg_t))) |
| 243 | goto trunc; |
| 244 | mpcp.reg = (const struct mpcp_reg_t *)tptr; |
| 245 | printf("\n\tAssigned-Port %u, Flags [ %s ]" \ |
| 246 | "\n\tSync-Time %u ticks, Echoed-Pending-Grants %u", |
| 247 | EXTRACT_16BITS(mpcp.reg->assigned_port), |
| 248 | bittok2str(mpcp_reg_flag_values, "Reserved", mpcp.reg->flags), |
| 249 | EXTRACT_16BITS(mpcp.reg->sync_time), |
| 250 | mpcp.reg->echoed_pending_grants); |
| 251 | break; |
| 252 | |
| 253 | case MPCP_OPCODE_REG_ACK: |
| 254 | if (!TTEST2(*tptr, sizeof(const struct mpcp_reg_ack_t))) |
| 255 | goto trunc; |
| 256 | mpcp.reg_ack = (const struct mpcp_reg_ack_t *)tptr; |
| 257 | printf("\n\tEchoed-Assigned-Port %u, Flags [ %s ]" \ |
| 258 | "\n\tEchoed-Sync-Time %u ticks", |
| 259 | EXTRACT_16BITS(mpcp.reg_ack->echoed_assigned_port), |
| 260 | bittok2str(mpcp_reg_ack_flag_values, "Reserved", mpcp.reg_ack->flags), |
| 261 | EXTRACT_16BITS(mpcp.reg_ack->echoed_sync_time)); |
| 262 | break; |
| 263 | |
| 264 | default: |
| 265 | /* unknown opcode - hexdump for now */ |
| 266 | print_unknown_data(pptr, "\n\t", length); |
| 267 | break; |
| 268 | } |
| 269 | |
| 270 | return; |
| 271 | |
| 272 | trunc: |
| 273 | printf("\n\t[|MPCP]"); |
| 274 | } |