contrib/tcpdump/print-aoe.c

   1 /*
   2  * Copyright (c) 2014 The TCPDUMP project
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  15  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  16  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  17  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  18  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  20  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  21  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  22  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  24  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  25  * POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 /* \summary: ATA over Ethernet (AoE) protocol printer */
  29
  30 /* specification: http://brantleycoilecompany.com/AoEr11.pdf */
  31
  32 #ifdef HAVE_CONFIG_H
  33 #include "config.h"
  34 #endif
  35
  36 #include <netdissect-stdinc.h>
  37
  38 #include "netdissect.h"
  39 #include "extract.h"
  40 #include "addrtoname.h"
  41 #include "ether.h"
  42
  43 static const char tstr[] = " [|aoe]";
  44
  45 #define AOE_V1 1
  46 #define ATA_SECTOR_SIZE 512
  47
  48 #define AOEV1_CMD_ISSUE_ATA_COMMAND        0
  49 #define AOEV1_CMD_QUERY_CONFIG_INFORMATION 1
  50 #define AOEV1_CMD_MAC_MASK_LIST            2
  51 #define AOEV1_CMD_RESERVE_RELEASE          3
  52
  53 static const struct tok cmdcode_str[] = {
  54         { AOEV1_CMD_ISSUE_ATA_COMMAND,        "Issue ATA Command"        },
  55         { AOEV1_CMD_QUERY_CONFIG_INFORMATION, "Query Config Information" },
  56         { AOEV1_CMD_MAC_MASK_LIST,            "MAC Mask List"            },
  57         { AOEV1_CMD_RESERVE_RELEASE,          "Reserve/Release"          },
  58         { 0, NULL }
  59 };
  60
  61 #define AOEV1_COMMON_HDR_LEN    10U /* up to but w/o Arg                */
  62 #define AOEV1_ISSUE_ARG_LEN     12U /* up to but w/o Data               */
  63 #define AOEV1_QUERY_ARG_LEN      8U /* up to but w/o Config String      */
  64 #define AOEV1_MAC_ARG_LEN        4U /* up to but w/o Directive 0        */
  65 #define AOEV1_RESERVE_ARG_LEN    2U /* up to but w/o Ethernet address 0 */
  66 #define AOEV1_MAX_CONFSTR_LEN 1024U
  67
  68 #define AOEV1_FLAG_R 0x08
  69 #define AOEV1_FLAG_E 0x04
  70
  71 static const struct tok aoev1_flag_str[] = {
  72         { AOEV1_FLAG_R, "Response" },
  73         { AOEV1_FLAG_E, "Error"    },
  74         { 0x02,         "MBZ-0x02" },
  75         { 0x01,         "MBZ-0x01" },
  76         { 0, NULL }
  77 };
  78
  79 static const struct tok aoev1_errcode_str[] = {
  80         { 1, "Unrecognized command code" },
  81         { 2, "Bad argument parameter"    },
  82         { 3, "Device unavailable"        },
  83         { 4, "Config string present"     },
  84         { 5, "Unsupported version"       },
  85         { 6, "Target is reserved"        },
  86         { 0, NULL }
  87 };
  88
  89 #define AOEV1_AFLAG_E 0x40
  90 #define AOEV1_AFLAG_D 0x10
  91 #define AOEV1_AFLAG_A 0x02
  92 #define AOEV1_AFLAG_W 0x01
  93
  94 static const struct tok aoev1_aflag_str[] = {
  95         { 0x08,          "MBZ-0x08" },
  96         { AOEV1_AFLAG_E, "Ext48"    },
  97         { 0x06,          "MBZ-0x06" },
  98         { AOEV1_AFLAG_D, "Device"   },
  99         { 0x04,          "MBZ-0x04" },
 100         { 0x03,          "MBZ-0x03" },
 101         { AOEV1_AFLAG_A, "Async"    },
 102         { AOEV1_AFLAG_W, "Write"    },
 103         { 0, NULL }
 104 };
 105
 106 static const struct tok aoev1_ccmd_str[] = {
 107         { 0, "read config string"        },
 108         { 1, "test config string"        },
 109         { 2, "test config string prefix" },
 110         { 3, "set config string"         },
 111         { 4, "force set config string"   },
 112         { 0, NULL }
 113 };
 114
 115 static const struct tok aoev1_mcmd_str[] = {
 116         { 0, "Read Mac Mask List" },
 117         { 1, "Edit Mac Mask List" },
 118         { 0, NULL }
 119 };
 120
 121 static const struct tok aoev1_merror_str[] = {
 122         { 1, "Unspecified Error"  },
 123         { 2, "Bad DCmd directive" },
 124         { 3, "Mask list full"     },
 125         { 0, NULL }
 126 };
 127
 128 static const struct tok aoev1_dcmd_str[] = {
 129         { 0, "No Directive"                      },
 130         { 1, "Add mac address to mask list"      },
 131         { 2, "Delete mac address from mask list" },
 132         { 0, NULL }
 133 };
 134
 135 static const struct tok aoev1_rcmd_str[] = {
 136         { 0, "Read reserve list"      },
 137         { 1, "Set reserve list"       },
 138         { 2, "Force set reserve list" },
 139         { 0, NULL }
 140 };
 141
 142 static void
 143 aoev1_issue_print(netdissect_options *ndo,
 144                   const u_char *cp, const u_int len)
 145 {
 146         const u_char *ep = cp + len;
 147
 148         if (len < AOEV1_ISSUE_ARG_LEN)
 149                 goto invalid;
 150         /* AFlags */
 151         ND_TCHECK2(*cp, 1);
 152         ND_PRINT((ndo, "\n\tAFlags: [%s]", bittok2str(aoev1_aflag_str, "none", *cp)));
 153         cp += 1;
 154         /* Err/Feature */
 155         ND_TCHECK2(*cp, 1);
 156         ND_PRINT((ndo, ", Err/Feature: %u", *cp));
 157         cp += 1;
 158         /* Sector Count (not correlated with the length) */
 159         ND_TCHECK2(*cp, 1);
 160         ND_PRINT((ndo, ", Sector Count: %u", *cp));
 161         cp += 1;
 162         /* Cmd/Status */
 163         ND_TCHECK2(*cp, 1);
 164         ND_PRINT((ndo, ", Cmd/Status: %u", *cp));
 165         cp += 1;
 166         /* lba0 */
 167         ND_TCHECK2(*cp, 1);
 168         ND_PRINT((ndo, "\n\tlba0: %u", *cp));
 169         cp += 1;
 170         /* lba1 */
 171         ND_TCHECK2(*cp, 1);
 172         ND_PRINT((ndo, ", lba1: %u", *cp));
 173         cp += 1;
 174         /* lba2 */
 175         ND_TCHECK2(*cp, 1);
 176         ND_PRINT((ndo, ", lba2: %u", *cp));
 177         cp += 1;
 178         /* lba3 */
 179         ND_TCHECK2(*cp, 1);
 180         ND_PRINT((ndo, ", lba3: %u", *cp));
 181         cp += 1;
 182         /* lba4 */
 183         ND_TCHECK2(*cp, 1);
 184         ND_PRINT((ndo, ", lba4: %u", *cp));
 185         cp += 1;
 186         /* lba5 */
 187         ND_TCHECK2(*cp, 1);
 188         ND_PRINT((ndo, ", lba5: %u", *cp));
 189         cp += 1;
 190         /* Reserved */
 191         ND_TCHECK2(*cp, 2);
 192         cp += 2;
 193         /* Data */
 194         if (len > AOEV1_ISSUE_ARG_LEN)
 195                 ND_PRINT((ndo, "\n\tData: %u bytes", len - AOEV1_ISSUE_ARG_LEN));
 196         return;
 197
 198 invalid:
 199         ND_PRINT((ndo, "%s", istr));
 200         ND_TCHECK2(*cp, ep - cp);
 201         return;
 202 trunc:
 203         ND_PRINT((ndo, "%s", tstr));
 204 }
 205
 206 static void
 207 aoev1_query_print(netdissect_options *ndo,
 208                   const u_char *cp, const u_int len)
 209 {
 210         const u_char *ep = cp + len;
 211         uint16_t cslen;
 212
 213         if (len < AOEV1_QUERY_ARG_LEN)
 214                 goto invalid;
 215         /* Buffer Count */
 216         ND_TCHECK2(*cp, 2);
 217         ND_PRINT((ndo, "\n\tBuffer Count: %u", EXTRACT_16BITS(cp)));
 218         cp += 2;
 219         /* Firmware Version */
 220         ND_TCHECK2(*cp, 2);
 221         ND_PRINT((ndo, ", Firmware Version: %u", EXTRACT_16BITS(cp)));
 222         cp += 2;
 223         /* Sector Count */
 224         ND_TCHECK2(*cp, 1);
 225         ND_PRINT((ndo, ", Sector Count: %u", *cp));
 226         cp += 1;
 227         /* AoE/CCmd */
 228         ND_TCHECK2(*cp, 1);
 229         ND_PRINT((ndo, ", AoE: %u, CCmd: %s", (*cp & 0xF0) >> 4,
 230                   tok2str(aoev1_ccmd_str, "Unknown (0x02x)", *cp & 0x0F)));
 231         cp += 1;
 232         /* Config String Length */
 233         ND_TCHECK2(*cp, 2);
 234         cslen = EXTRACT_16BITS(cp);
 235         cp += 2;
 236         if (cslen > AOEV1_MAX_CONFSTR_LEN || AOEV1_QUERY_ARG_LEN + cslen > len)
 237                 goto invalid;
 238         /* Config String */
 239         ND_TCHECK2(*cp, cslen);
 240         if (cslen) {
 241                 ND_PRINT((ndo, "\n\tConfig String (length %u): ", cslen));
 242                 if (fn_printn(ndo, cp, cslen, ndo->ndo_snapend))
 243                         goto trunc;
 244         }
 245         return;
 246
 247 invalid:
 248         ND_PRINT((ndo, "%s", istr));
 249         ND_TCHECK2(*cp, ep - cp);
 250         return;
 251 trunc:
 252         ND_PRINT((ndo, "%s", tstr));
 253 }
 254
 255 static void
 256 aoev1_mac_print(netdissect_options *ndo,
 257                 const u_char *cp, const u_int len)
 258 {
 259         const u_char *ep = cp + len;
 260         uint8_t dircount, i;
 261
 262         if (len < AOEV1_MAC_ARG_LEN)
 263                 goto invalid;
 264         /* Reserved */
 265         ND_TCHECK2(*cp, 1);
 266         cp += 1;
 267         /* MCmd */
 268         ND_TCHECK2(*cp, 1);
 269         ND_PRINT((ndo, "\n\tMCmd: %s", tok2str(aoev1_mcmd_str, "Unknown (0x%02x)", *cp)));
 270         cp += 1;
 271         /* MError */
 272         ND_TCHECK2(*cp, 1);
 273         ND_PRINT((ndo, ", MError: %s", tok2str(aoev1_merror_str, "Unknown (0x%02x)", *cp)));
 274         cp += 1;
 275         /* Dir Count */
 276         ND_TCHECK2(*cp, 1);
 277         dircount = *cp;
 278         cp += 1;
 279         ND_PRINT((ndo, ", Dir Count: %u", dircount));
 280         if (AOEV1_MAC_ARG_LEN + dircount * 8 > len)
 281                 goto invalid;
 282         /* directives */
 283         for (i = 0; i < dircount; i++) {
 284                 /* Reserved */
 285                 ND_TCHECK2(*cp, 1);
 286                 cp += 1;
 287                 /* DCmd */
 288                 ND_TCHECK2(*cp, 1);
 289                 ND_PRINT((ndo, "\n\t DCmd: %s", tok2str(aoev1_dcmd_str, "Unknown (0x%02x)", *cp)));
 290                 cp += 1;
 291                 /* Ethernet Address */
 292                 ND_TCHECK2(*cp, ETHER_ADDR_LEN);
 293                 ND_PRINT((ndo, ", Ethernet Address: %s", etheraddr_string(ndo, cp)));
 294                 cp += ETHER_ADDR_LEN;
 295         }
 296         return;
 297
 298 invalid:
 299         ND_PRINT((ndo, "%s", istr));
 300         ND_TCHECK2(*cp, ep - cp);
 301         return;
 302 trunc:
 303         ND_PRINT((ndo, "%s", tstr));
 304 }
 305
 306 static void
 307 aoev1_reserve_print(netdissect_options *ndo,
 308                     const u_char *cp, const u_int len)
 309 {
 310         const u_char *ep = cp + len;
 311         uint8_t nmacs, i;
 312
 313         if (len < AOEV1_RESERVE_ARG_LEN || (len - AOEV1_RESERVE_ARG_LEN) % ETHER_ADDR_LEN)
 314                 goto invalid;
 315         /* RCmd */
 316         ND_TCHECK2(*cp, 1);
 317         ND_PRINT((ndo, "\n\tRCmd: %s", tok2str(aoev1_rcmd_str, "Unknown (0x%02x)", *cp)));
 318         cp += 1;
 319         /* NMacs (correlated with the length) */
 320         ND_TCHECK2(*cp, 1);
 321         nmacs = *cp;
 322         cp += 1;
 323         ND_PRINT((ndo, ", NMacs: %u", nmacs));
 324         if (AOEV1_RESERVE_ARG_LEN + nmacs * ETHER_ADDR_LEN != len)
 325                 goto invalid;
 326         /* addresses */
 327         for (i = 0; i < nmacs; i++) {
 328                 ND_PRINT((ndo, "\n\tEthernet Address %u: %s", i, etheraddr_string(ndo, cp)));
 329                 cp += ETHER_ADDR_LEN;
 330         }
 331         return;
 332
 333 invalid:
 334         ND_PRINT((ndo, "%s", istr));
 335         ND_TCHECK2(*cp, ep - cp);
 336         return;
 337 trunc:
 338         ND_PRINT((ndo, "%s", tstr));
 339 }
 340
 341 /* cp points to the Ver/Flags octet */
 342 static void
 343 aoev1_print(netdissect_options *ndo,
 344             const u_char *cp, const u_int len)
 345 {
 346         const u_char *ep = cp + len;
 347         uint8_t flags, command;
 348         void (*cmd_decoder)(netdissect_options *, const u_char *, const u_int);
 349
 350         if (len < AOEV1_COMMON_HDR_LEN)
 351                 goto invalid;
 352         /* Flags */
 353         flags = *cp & 0x0F;
 354         ND_PRINT((ndo, ", Flags: [%s]", bittok2str(aoev1_flag_str, "none", flags)));
 355         cp += 1;
 356         if (! ndo->ndo_vflag)
 357                 return;
 358         /* Error */
 359         ND_TCHECK2(*cp, 1);
 360         if (flags & AOEV1_FLAG_E)
 361                 ND_PRINT((ndo, "\n\tError: %s", tok2str(aoev1_errcode_str, "Invalid (%u)", *cp)));
 362         cp += 1;
 363         /* Major */
 364         ND_TCHECK2(*cp, 2);
 365         ND_PRINT((ndo, "\n\tMajor: 0x%04x", EXTRACT_16BITS(cp)));
 366         cp += 2;
 367         /* Minor */
 368         ND_TCHECK2(*cp, 1);
 369         ND_PRINT((ndo, ", Minor: 0x%02x", *cp));
 370         cp += 1;
 371         /* Command */
 372         ND_TCHECK2(*cp, 1);
 373         command = *cp;
 374         cp += 1;
 375         ND_PRINT((ndo, ", Command: %s", tok2str(cmdcode_str, "Unknown (0x%02x)", command)));
 376         /* Tag */
 377         ND_TCHECK2(*cp, 4);
 378         ND_PRINT((ndo, ", Tag: 0x%08x", EXTRACT_32BITS(cp)));
 379         cp += 4;
 380         /* Arg */
 381         cmd_decoder =
 382                 command == AOEV1_CMD_ISSUE_ATA_COMMAND        ? aoev1_issue_print :
 383                 command == AOEV1_CMD_QUERY_CONFIG_INFORMATION ? aoev1_query_print :
 384                 command == AOEV1_CMD_MAC_MASK_LIST            ? aoev1_mac_print :
 385                 command == AOEV1_CMD_RESERVE_RELEASE          ? aoev1_reserve_print :
 386                 NULL;
 387         if (cmd_decoder != NULL)
 388                 cmd_decoder(ndo, cp, len - AOEV1_COMMON_HDR_LEN);
 389         return;
 390
 391 invalid:
 392         ND_PRINT((ndo, "%s", istr));
 393         ND_TCHECK2(*cp, ep - cp);
 394         return;
 395 trunc:
 396         ND_PRINT((ndo, "%s", tstr));
 397 }
 398
 399 void
 400 aoe_print(netdissect_options *ndo,
 401           const u_char *cp, const u_int len)
 402 {
 403         const u_char *ep = cp + len;
 404         uint8_t ver;
 405
 406         ND_PRINT((ndo, "AoE length %u", len));
 407
 408         if (len < 1)
 409                 goto invalid;
 410         /* Ver/Flags */
 411         ND_TCHECK2(*cp, 1);
 412         ver = (*cp & 0xF0) >> 4;
 413         /* Don't advance cp yet: low order 4 bits are version-specific. */
 414         ND_PRINT((ndo, ", Ver %u", ver));
 415
 416         switch (ver) {
 417                 case AOE_V1:
 418                         aoev1_print(ndo, cp, len);
 419                         break;
 420         }
 421         return;
 422
 423 invalid:
 424         ND_PRINT((ndo, "%s", istr));
 425         ND_TCHECK2(*cp, ep - cp);
 426         return;
 427 trunc:
 428         ND_PRINT((ndo, "%s", tstr));
 429 }
 430