epan/dissectors/packet-gearman.c

   1 /* packet-gearman.c
   2  * Routines for Gearman protocol packet disassembly
   3  * By Flier Lu <flier.lu@gmail.com>
   4  * Copyright 2010 Flier Lu
   5  *
   6  * Gearman Protocol
   7  * ----------------
   8  * http://gearman.org/index.php?id=protocol
   9  *
  10  * Wireshark - Network traffic analyzer
  11  * By Gerald Combs <gerald@wireshark.org>
  12  * Copyright 1998 Gerald Combs
  13  *
  14  * This program is free software; you can redistribute it and/or
  15  * modify it under the terms of the GNU General Public License
  16  * as published by the Free Software Foundation; either version 2
  17  * of the License, or (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  27  */
  28
  29 #include "config.h"
  30
  31 #include <epan/packet.h>
  32 #include <epan/prefs.h>
  33 #include <epan/expert.h>
  34 #include "packet-tcp.h"
  35
  36 void proto_register_gearman(void);
  37 void proto_reg_handoff_gearman(void);
  38
  39 static int proto_gearman = -1;
  40
  41 static int hf_gearman_mgr_cmd = -1;
  42 static int hf_gearman_magic_code = -1;
  43 static int hf_gearman_pkt_type = -1;
  44 static int hf_gearman_data_size = -1;
  45 static int hf_gearman_data_content = -1;
  46 static int hf_gearman_option_name = -1;
  47 static int hf_gearman_func_name = -1;
  48 static int hf_gearman_func_namez = -1;
  49 static int hf_gearman_client_id = -1;
  50 static int hf_gearman_uniq_id = -1;
  51 static int hf_gearman_argument = -1;
  52 static int hf_gearman_job_handle = -1;
  53 static int hf_gearman_job_handlez = -1;
  54 static int hf_gearman_complete_numerator = -1;
  55 static int hf_gearman_complete_denominator = -1;
  56 static int hf_gearman_submit_job_sched_minute = -1;
  57 static int hf_gearman_submit_job_sched_hour = -1;
  58 static int hf_gearman_submit_job_sched_day_of_month = -1;
  59 static int hf_gearman_submit_job_sched_month = -1;
  60 static int hf_gearman_submit_job_sched_day_of_week = -1;
  61 static int hf_gearman_submit_job_epoch_time = -1;
  62 static int hf_gearman_result = -1;
  63 static int hf_gearman_known_status = -1;
  64 static int hf_gearman_running_status = -1;
  65 static int hf_gearman_echo_text = -1;
  66 static int hf_gearman_err_code = -1;
  67 static int hf_gearman_err_text = -1;
  68
  69 static gint ett_gearman = -1;
  70 static gint ett_gearman_command = -1;
  71 static gint ett_gearman_content = -1;
  72
  73 static expert_field ei_gearman_pkt_type_unknown = EI_INIT;
  74
  75 static gboolean gearman_desegment  = TRUE;
  76
  77 static const int GEARMAN_COMMAND_HEADER_SIZE = 12;
  78 static const int GEARMAN_PORT = 4730;
  79 static const gchar *GEARMAN_MAGIC_CODE_REQUEST = "\0REQ";
  80 static const gchar *GEARMAN_MAGIC_CODE_RESPONSE = "\0RES";
  81
  82 static const gchar *GEARMAN_MGR_CMDS[] = {
  83   "workers",
  84   "status",
  85   "maxqueue",
  86   "shutdown",
  87   "version"
  88 };
  89
  90 static const int GEARMAN_MGR_CMDS_COUNT = sizeof(GEARMAN_MGR_CMDS)/sizeof(GEARMAN_MGR_CMDS[0]);
  91
  92 typedef enum
  93 {
  94   GEARMAN_COMMAND_TEXT,
  95   GEARMAN_COMMAND_CAN_DO,              /* W->J: FUNC */
  96   GEARMAN_COMMAND_CANT_DO,             /* W->J: FUNC */
  97   GEARMAN_COMMAND_RESET_ABILITIES,     /* W->J: -- */
  98   GEARMAN_COMMAND_PRE_SLEEP,           /* W->J: -- */
  99   GEARMAN_COMMAND_UNUSED,
 100   GEARMAN_COMMAND_NOOP,                /* J->W: -- */
 101   GEARMAN_COMMAND_SUBMIT_JOB,          /* C->J: FUNC[0]UNIQ[0]ARGS */
 102   GEARMAN_COMMAND_JOB_CREATED,         /* J->C: HANDLE  */
 103   GEARMAN_COMMAND_GRAB_JOB,            /* W->J: --  */
 104   GEARMAN_COMMAND_NO_JOB,              /* J->W: -- */
 105   GEARMAN_COMMAND_JOB_ASSIGN,          /* J->W: HANDLE[0]FUNC[0]ARG  */
 106   GEARMAN_COMMAND_WORK_STATUS,         /* W->J/C: HANDLE[0]NUMERATOR[0]DENOMINATOR */
 107   GEARMAN_COMMAND_WORK_COMPLETE,       /* W->J/C: HANDLE[0]RES */
 108   GEARMAN_COMMAND_WORK_FAIL,           /* W->J/C: HANDLE */
 109   GEARMAN_COMMAND_GET_STATUS,          /* C->J: HANDLE */
 110   GEARMAN_COMMAND_ECHO_REQ,            /* ?->J: TEXT */
 111   GEARMAN_COMMAND_ECHO_RES,            /* J->?: TEXT */
 112   GEARMAN_COMMAND_SUBMIT_JOB_BG,       /* C->J: FUNC[0]UNIQ[0]ARGS  */
 113   GEARMAN_COMMAND_ERROR,               /* J->?: ERRCODE[0]ERR_TEXT */
 114   GEARMAN_COMMAND_STATUS_RES,          /* C->J: HANDLE[0]KNOWN[0]RUNNING[0]NUM[0]DENOM */
 115   GEARMAN_COMMAND_SUBMIT_JOB_HIGH,     /* C->J: FUNC[0]UNIQ[0]ARGS  */
 116   GEARMAN_COMMAND_SET_CLIENT_ID,       /* W->J: [RANDOM_STRING_NO_WHITESPACE] */
 117   GEARMAN_COMMAND_CAN_DO_TIMEOUT,      /* W->J: FUNC[0]TIMEOUT */
 118   GEARMAN_COMMAND_ALL_YOURS,
 119   GEARMAN_COMMAND_WORK_EXCEPTION,
 120   GEARMAN_COMMAND_OPTION_REQ,
 121   GEARMAN_COMMAND_OPTION_RES,
 122   GEARMAN_COMMAND_WORK_DATA,
 123   GEARMAN_COMMAND_WORK_WARNING,
 124   GEARMAN_COMMAND_GRAB_JOB_UNIQ,
 125   GEARMAN_COMMAND_JOB_ASSIGN_UNIQ,
 126   GEARMAN_COMMAND_SUBMIT_JOB_HIGH_BG,
 127   GEARMAN_COMMAND_SUBMIT_JOB_LOW,
 128   GEARMAN_COMMAND_SUBMIT_JOB_LOW_BG,
 129   GEARMAN_COMMAND_SUBMIT_JOB_SCHED,
 130   GEARMAN_COMMAND_SUBMIT_JOB_EPOCH,
 131   GEARMAN_COMMAND_MAX /* Always add new commands before this. */
 132 } gearman_command_t;
 133
 134 static const value_string gearman_command_names[] = {
 135   { GEARMAN_COMMAND_TEXT,               "TEXT" },
 136   { GEARMAN_COMMAND_CAN_DO,             "CAN_DO" },             /* W->J: FUNC */
 137   { GEARMAN_COMMAND_CANT_DO,            "CANT_DO" },            /* W->J: FUNC */
 138   { GEARMAN_COMMAND_RESET_ABILITIES,    "RESET_ABILITIES" },    /* W->J: -- */
 139   { GEARMAN_COMMAND_PRE_SLEEP,          "PRE_SLEEP" },          /* W->J: -- */
 140   { GEARMAN_COMMAND_UNUSED,             "UNUSED" },
 141   { GEARMAN_COMMAND_NOOP,               "NOOP" },               /* J->W: -- */
 142   { GEARMAN_COMMAND_SUBMIT_JOB,         "SUBMIT_JOB" },         /* C->J: FUNC[0]UNIQ[0]ARGS */
 143   { GEARMAN_COMMAND_JOB_CREATED,        "JOB_CREATED" },        /* J->C: HANDLE  */
 144   { GEARMAN_COMMAND_GRAB_JOB,           "GRAB_JOB" },           /* W->J: --  */
 145   { GEARMAN_COMMAND_NO_JOB,             "NO_JOB" },             /* J->W: -- */
 146   { GEARMAN_COMMAND_JOB_ASSIGN,         "JOB_ASSIGN" },         /* J->W: HANDLE[0]FUNC[0]ARG  */
 147   { GEARMAN_COMMAND_WORK_STATUS,        "WORK_STATUS" },        /* W->J/C: HANDLE[0]NUMERATOR[0]DENOMINATOR */
 148   { GEARMAN_COMMAND_WORK_COMPLETE,      "WORK_COMPLETE" },      /* W->J/C: HANDLE[0]RES */
 149   { GEARMAN_COMMAND_WORK_FAIL,          "WORK_FAIL" },          /* W->J/C: HANDLE */
 150   { GEARMAN_COMMAND_GET_STATUS,         "GET_STATUS" },         /* C->J: HANDLE */
 151   { GEARMAN_COMMAND_ECHO_REQ,           "ECHO_REQ" },           /* ?->J: TEXT */
 152   { GEARMAN_COMMAND_ECHO_RES,           "ECHO_RES" },           /* J->?: TEXT */
 153   { GEARMAN_COMMAND_SUBMIT_JOB_BG,      "SUBMIT_JOB_BG" },      /* C->J: FUNC[0]UNIQ[0]ARGS  */
 154   { GEARMAN_COMMAND_ERROR,              "ERROR" },              /* J->?: ERRCODE[0]ERR_TEXT */
 155   { GEARMAN_COMMAND_STATUS_RES,         "STATUS_RES" },         /* C->J: HANDLE[0]KNOWN[0]RUNNING[0]NUM[0]DENOM */
 156   { GEARMAN_COMMAND_SUBMIT_JOB_HIGH,    "SUBMIT_JOB_HIGH" },    /* C->J: FUNC[0]UNIQ[0]ARGS  */
 157   { GEARMAN_COMMAND_SET_CLIENT_ID,      "SET_CLIENT_ID" },      /* W->J: [RANDOM_STRING_NO_WHITESPACE] */
 158   { GEARMAN_COMMAND_CAN_DO_TIMEOUT,     "CAN_DO_TIMEOUT" },     /* W->J: FUNC[0]TIMEOUT */
 159   { GEARMAN_COMMAND_ALL_YOURS,          "ALL_YOURS" },
 160   { GEARMAN_COMMAND_WORK_EXCEPTION,     "WORK_EXCEPTION" },
 161   { GEARMAN_COMMAND_OPTION_REQ,         "OPTION_REQ" },
 162   { GEARMAN_COMMAND_OPTION_RES,         "OPTION_RES" },
 163   { GEARMAN_COMMAND_WORK_DATA,          "WORK_DATA" },
 164   { GEARMAN_COMMAND_WORK_WARNING,       "WORK_WARNING" },
 165   { GEARMAN_COMMAND_GRAB_JOB_UNIQ,      "GRAB_JOB_UNIQ" },
 166   { GEARMAN_COMMAND_JOB_ASSIGN_UNIQ,    "JOB_ASSIGN_UNIQ" },
 167   { GEARMAN_COMMAND_SUBMIT_JOB_HIGH_BG, "SUBMIT_JOB_HIGH_BG" },
 168   { GEARMAN_COMMAND_SUBMIT_JOB_LOW,     "SUBMIT_JOB_LOW" },
 169   { GEARMAN_COMMAND_SUBMIT_JOB_LOW_BG,  "SUBMIT_JOB_LOW_BG" },
 170   { GEARMAN_COMMAND_SUBMIT_JOB_SCHED,   "SUBMIT_JOB_SCHED" },
 171   { GEARMAN_COMMAND_SUBMIT_JOB_EPOCH,   "SUBMIT_JOB_EPOCH" },
 172   { 0, NULL}
 173 };
 174
 175 static guint
 176 get_gearman_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset)
 177 {
 178     return tvb_get_ntohl(tvb, offset+8)+GEARMAN_COMMAND_HEADER_SIZE;
 179 }
 180
 181 static int
 182 dissect_binary_packet(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
 183 {
 184   gint offset, start_offset;
 185   char *magic_code;
 186   guint32 type, size;
 187   guint len;
 188   proto_item *content_item = NULL;
 189   proto_tree *content_tree = NULL;
 190
 191   col_set_str(pinfo->cinfo, COL_PROTOCOL, "Gearman");
 192   col_clear(pinfo->cinfo,COL_INFO);
 193
 194   magic_code = tvb_get_string_enc(wmem_packet_scope(), tvb, 1, 3, ENC_ASCII);
 195   type = tvb_get_ntohl(tvb, 4);
 196   size = tvb_get_ntohl(tvb, 8);
 197
 198   col_append_sep_fstr(pinfo->cinfo, COL_INFO, " , ", "[%s] ", magic_code);
 199
 200   col_append_fstr(pinfo->cinfo, COL_INFO, "%s(%d) LEN=%d",
 201       val_to_str(type, gearman_command_names, "Unknown (0x%08x)"), type, size);
 202
 203   if (tree) {
 204     proto_item *ti;
 205     proto_tree *command_tree, *gearman_tree;
 206     ti = proto_tree_add_item(tree, proto_gearman, tvb, 0, -1, ENC_NA);
 207     gearman_tree = proto_item_add_subtree(ti, ett_gearman);
 208
 209     ti = proto_tree_add_text(gearman_tree, tvb, 0, GEARMAN_COMMAND_HEADER_SIZE+size,
 210                              "[%s] %s(%d) LEN=%d", magic_code, val_to_str(type, gearman_command_names, "Unknown (0x%08x)"), type, size);
 211     command_tree = proto_item_add_subtree(ti, ett_gearman_command);
 212
 213     proto_tree_add_string(command_tree, hf_gearman_magic_code, tvb, 0, 4, magic_code);
 214     proto_tree_add_item(command_tree, hf_gearman_pkt_type, tvb, 4, 4, ENC_BIG_ENDIAN);
 215     proto_tree_add_item(command_tree, hf_gearman_data_size, tvb, 8, 4, ENC_BIG_ENDIAN);
 216
 217     content_item = proto_tree_add_item(command_tree, hf_gearman_data_content, tvb, GEARMAN_COMMAND_HEADER_SIZE, size, ENC_ASCII|ENC_NA);
 218     content_tree = proto_item_add_subtree(content_item, ett_gearman_content);
 219
 220     }
 221   offset = GEARMAN_COMMAND_HEADER_SIZE;
 222
 223   switch(type)
 224   {
 225   case GEARMAN_COMMAND_ECHO_REQ:
 226   case GEARMAN_COMMAND_ECHO_RES:
 227     if (!tree) break;
 228     proto_tree_add_item(content_tree, hf_gearman_echo_text, tvb,
 229                offset, size, ENC_NA|ENC_ASCII);
 230     break;
 231
 232   case GEARMAN_COMMAND_ERROR:
 233     if (!tree) break;
 234     len = tvb_strsize(tvb, offset);
 235     proto_tree_add_item(content_tree, hf_gearman_err_code, tvb, offset, len, ENC_NA|ENC_ASCII);
 236     proto_tree_add_item(content_tree, hf_gearman_err_text, tvb, offset+len, size-len, ENC_NA|ENC_ASCII);
 237     break;
 238
 239   case GEARMAN_COMMAND_JOB_CREATED:
 240   case GEARMAN_COMMAND_WORK_FAIL:
 241     if (!tree) break;
 242     proto_tree_add_item(content_tree, hf_gearman_job_handle, tvb,
 243                offset, size, ENC_NA|ENC_ASCII);
 244     break;
 245
 246   case GEARMAN_COMMAND_STATUS_RES:
 247     if (!tree) break;
 248     start_offset = offset;
 249     len = tvb_strsize(tvb, start_offset);
 250     proto_tree_add_item(content_tree, hf_gearman_job_handlez, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 251
 252     start_offset += len;
 253     len = tvb_strsize(tvb, start_offset);
 254     proto_tree_add_item(content_tree, hf_gearman_known_status, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 255
 256     start_offset += len;
 257     len = tvb_strsize(tvb, start_offset);
 258     proto_tree_add_item(content_tree, hf_gearman_running_status, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 259
 260     start_offset += len;
 261     len = tvb_strsize(tvb, start_offset);
 262     proto_tree_add_item(content_tree, hf_gearman_complete_numerator, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 263
 264     proto_tree_add_item(content_tree, hf_gearman_complete_denominator, tvb, start_offset+len, size-start_offset+GEARMAN_COMMAND_HEADER_SIZE, ENC_NA|ENC_ASCII);
 265         break;
 266
 267   case GEARMAN_COMMAND_OPTION_REQ:
 268   case GEARMAN_COMMAND_OPTION_RES:
 269     if (!tree) break;
 270     proto_tree_add_item(content_tree, hf_gearman_option_name, tvb,
 271                offset, size, ENC_NA|ENC_ASCII);
 272     break;
 273
 274   case GEARMAN_COMMAND_SUBMIT_JOB:
 275   case GEARMAN_COMMAND_SUBMIT_JOB_BG:
 276   case GEARMAN_COMMAND_SUBMIT_JOB_HIGH:
 277   case GEARMAN_COMMAND_SUBMIT_JOB_HIGH_BG:
 278   case GEARMAN_COMMAND_SUBMIT_JOB_LOW:
 279   case GEARMAN_COMMAND_SUBMIT_JOB_LOW_BG:
 280     if (!tree) break;
 281     start_offset = offset;
 282     len = tvb_strsize(tvb, start_offset);
 283     proto_tree_add_item(content_tree, hf_gearman_func_name, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 284
 285     start_offset += len;
 286     len = tvb_strsize(tvb, start_offset);
 287     proto_tree_add_item(content_tree, hf_gearman_uniq_id, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 288
 289     proto_tree_add_item(content_tree, hf_gearman_argument, tvb, start_offset+len, size-start_offset+GEARMAN_COMMAND_HEADER_SIZE, ENC_NA|ENC_ASCII);
 290     break;
 291
 292   case GEARMAN_COMMAND_SUBMIT_JOB_SCHED:
 293     if (!tree) break;
 294     start_offset = offset;
 295     len = tvb_strsize(tvb, start_offset);
 296     proto_tree_add_item(content_tree, hf_gearman_func_name, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 297
 298     start_offset += len;
 299     len = tvb_strsize(tvb, start_offset);
 300     proto_tree_add_item(content_tree, hf_gearman_uniq_id, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 301
 302     start_offset += len;
 303     len = tvb_strsize(tvb, start_offset);
 304     proto_tree_add_item(content_tree, hf_gearman_submit_job_sched_minute, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 305
 306     start_offset += len;
 307     len = tvb_strsize(tvb, start_offset);
 308     proto_tree_add_item(content_tree, hf_gearman_submit_job_sched_hour, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 309
 310     start_offset += len;
 311     len = tvb_strsize(tvb, start_offset);
 312     proto_tree_add_item(content_tree, hf_gearman_submit_job_sched_day_of_month, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 313
 314     start_offset += len;
 315     len = tvb_strsize(tvb, start_offset);
 316     proto_tree_add_item(content_tree, hf_gearman_submit_job_sched_month, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 317
 318     start_offset += len;
 319     len = tvb_strsize(tvb, start_offset);
 320     proto_tree_add_item(content_tree, hf_gearman_submit_job_sched_day_of_week, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 321
 322     proto_tree_add_item(content_tree, hf_gearman_argument, tvb, start_offset+len, size-start_offset+GEARMAN_COMMAND_HEADER_SIZE, ENC_NA|ENC_ASCII);
 323     break;
 324
 325   case GEARMAN_COMMAND_SUBMIT_JOB_EPOCH:
 326     if (!tree) break;
 327     start_offset = offset;
 328     len = tvb_strsize(tvb, start_offset);
 329     proto_tree_add_item(content_tree, hf_gearman_func_name, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 330
 331     start_offset += len;
 332     len = tvb_strsize(tvb, start_offset);
 333     proto_tree_add_item(content_tree, hf_gearman_uniq_id, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 334
 335     start_offset += len;
 336     len = tvb_strsize(tvb, start_offset);
 337     proto_tree_add_item(content_tree, hf_gearman_submit_job_epoch_time, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 338
 339     proto_tree_add_item(content_tree, hf_gearman_argument, tvb, start_offset+len, size-start_offset+GEARMAN_COMMAND_HEADER_SIZE, ENC_NA|ENC_ASCII);
 340     break;
 341
 342   case GEARMAN_COMMAND_JOB_ASSIGN:
 343     start_offset = offset;
 344     len = tvb_strsize(tvb, start_offset);
 345     proto_tree_add_item(content_tree, hf_gearman_job_handlez, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 346
 347     start_offset += len;
 348     len = tvb_strsize(tvb, start_offset);
 349     proto_tree_add_item(content_tree, hf_gearman_func_namez, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 350
 351     proto_tree_add_item(content_tree, hf_gearman_argument, tvb, start_offset+len, size-start_offset+GEARMAN_COMMAND_HEADER_SIZE, ENC_NA|ENC_ASCII);
 352     break;
 353
 354   case GEARMAN_COMMAND_JOB_ASSIGN_UNIQ:
 355     start_offset = offset;
 356     len = tvb_strsize(tvb, start_offset);
 357     proto_tree_add_item(content_tree, hf_gearman_job_handlez, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 358
 359     start_offset += len;
 360     len = tvb_strsize(tvb, start_offset);
 361     proto_tree_add_item(content_tree, hf_gearman_func_namez, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 362
 363     start_offset += len;
 364     len = tvb_strsize(tvb, start_offset);
 365     proto_tree_add_item(content_tree, hf_gearman_uniq_id, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 366
 367     proto_tree_add_item(content_tree, hf_gearman_argument, tvb, start_offset+len, size-start_offset+GEARMAN_COMMAND_HEADER_SIZE, ENC_NA|ENC_ASCII);
 368     break;
 369
 370   case GEARMAN_COMMAND_CAN_DO:
 371   case GEARMAN_COMMAND_CANT_DO:
 372     if (!tree) break;
 373     proto_tree_add_item(content_tree, hf_gearman_func_name, tvb,
 374                offset, size, ENC_NA|ENC_ASCII);
 375     break;
 376
 377   case GEARMAN_COMMAND_CAN_DO_TIMEOUT:
 378     if (!tree) break;
 379     proto_tree_add_item(content_tree, hf_gearman_func_name, tvb,
 380                offset, tvb_strsize(tvb, offset), ENC_NA|ENC_ASCII);
 381     break;
 382
 383   case GEARMAN_COMMAND_WORK_DATA:
 384   case GEARMAN_COMMAND_WORK_WARNING:
 385   case GEARMAN_COMMAND_WORK_COMPLETE:
 386   case GEARMAN_COMMAND_WORK_EXCEPTION:
 387     if (!tree) break;
 388     len = tvb_strsize(tvb, offset);
 389     proto_tree_add_item(content_tree, hf_gearman_job_handlez, tvb, offset, len, ENC_NA|ENC_ASCII);
 390     proto_tree_add_item(content_tree, hf_gearman_result, tvb, offset+len, size-len, ENC_NA|ENC_ASCII);
 391     break;
 392
 393   case GEARMAN_COMMAND_WORK_STATUS:
 394     if (!tree) break;
 395     start_offset = offset;
 396     len = tvb_strsize(tvb, start_offset);
 397     proto_tree_add_item(content_tree, hf_gearman_job_handlez, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 398
 399     start_offset += len;
 400     len = tvb_strsize(tvb, start_offset);
 401     proto_tree_add_item(content_tree, hf_gearman_complete_numerator, tvb, start_offset, len, ENC_NA|ENC_ASCII);
 402
 403     proto_tree_add_item(content_tree, hf_gearman_complete_denominator, tvb, start_offset+len, size-start_offset+GEARMAN_COMMAND_HEADER_SIZE, ENC_NA|ENC_ASCII);
 404     break;
 405
 406   case GEARMAN_COMMAND_SET_CLIENT_ID:
 407     if (!tree) break;
 408     proto_tree_add_item(content_tree, hf_gearman_client_id, tvb,
 409                offset, size, ENC_NA|ENC_ASCII);
 410     break;
 411
 412   default:
 413     if (size > 0)
 414       expert_add_info(pinfo, content_item, &ei_gearman_pkt_type_unknown);
 415   }
 416
 417   col_set_fence(pinfo->cinfo, COL_INFO);
 418   return tvb_length(tvb);
 419 }
 420
 421 static void
 422 dissect_management_packet(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 423 {
 424   int i, type = 0, cmdlen, linelen, offset = 0, next_offset = 0;
 425   proto_item *ti;
 426   proto_tree *gearman_tree;
 427
 428   col_set_str(pinfo->cinfo, COL_PROTOCOL, "Gearman");
 429   col_clear(pinfo->cinfo, COL_INFO);
 430
 431   ti = proto_tree_add_item(tree, proto_gearman, tvb, 0, -1, ENC_NA);
 432   gearman_tree = proto_item_add_subtree(ti, ett_gearman);
 433
 434   while ((linelen = tvb_find_line_end(tvb, offset, -1, &next_offset, FALSE)) > 0)
 435   {
 436     for (i=0; i<GEARMAN_MGR_CMDS_COUNT; i++)
 437     {
 438       /* the array is a const and clearly none of the elements are longer than
 439        * MAX_SIGNED_INT so this is a safe cast */
 440       cmdlen = (int)strlen(GEARMAN_MGR_CMDS[i]);
 441
 442       if (cmdlen == linelen && 0 == tvb_strneql(tvb, offset, GEARMAN_MGR_CMDS[i], cmdlen))
 443       {
 444         proto_tree_add_item(gearman_tree, hf_gearman_mgr_cmd, tvb, offset, cmdlen, ENC_ASCII|ENC_NA);
 445         col_add_fstr(pinfo->cinfo, COL_INFO, "[MGR] %s", tvb_get_string_enc(wmem_packet_scope(), tvb, offset, linelen, ENC_ASCII));
 446         type = 1;
 447         break;
 448       }
 449     }
 450
 451     if (GEARMAN_MGR_CMDS_COUNT == i)
 452     {
 453       proto_tree_add_format_text(gearman_tree, tvb, offset, next_offset - offset);
 454
 455       if (type == 0)
 456       {
 457         col_add_fstr(pinfo->cinfo, COL_INFO, "[MGR] %s", tvb_get_string_enc(wmem_packet_scope(), tvb, offset, linelen, ENC_ASCII));
 458         type = -1;
 459       }
 460       else
 461       {
 462         col_append_sep_fstr(pinfo->cinfo, COL_INFO, ",", "%s", tvb_get_string_enc(wmem_packet_scope(), tvb, offset, linelen, ENC_ASCII));
 463       }
 464     }
 465
 466     offset = next_offset;
 467   }
 468 }
 469
 470 static int
 471 dissect_gearman(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
 472 {
 473   if ((0 == tvb_memeql(tvb, 0, GEARMAN_MAGIC_CODE_REQUEST, 4)) ||
 474       (0 == tvb_memeql(tvb, 0, GEARMAN_MAGIC_CODE_RESPONSE, 4)))
 475   {
 476     tcp_dissect_pdus(tvb, pinfo, tree, gearman_desegment, GEARMAN_COMMAND_HEADER_SIZE, get_gearman_pdu_len, dissect_binary_packet, data);
 477   }
 478   else
 479   {
 480     dissect_management_packet(tvb, pinfo, tree);
 481   }
 482
 483   return tvb_length(tvb);
 484 }
 485
 486 void
 487 proto_register_gearman(void)
 488 {
 489   static hf_register_info hf[] = {
 490     { &hf_gearman_mgr_cmd, { "Management Command", "gearman.mgr_cmd", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
 491     { &hf_gearman_magic_code, { "Magic Code", "gearman.magic_code", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
 492     { &hf_gearman_pkt_type, { "Packet Type", "gearman.pkt_type", FT_UINT32, BASE_DEC_HEX, VALS(gearman_command_names), 0x0, NULL, HFILL} },
 493     { &hf_gearman_data_size, { "Data Length", "gearman.data_size", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL} },
 494     { &hf_gearman_data_content, { "Data Content", "gearman.data_content", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 495     { &hf_gearman_option_name, { "Option Name", "gearman.opt.name", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 496     { &hf_gearman_func_name, { "Function Name", "gearman.func.name", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 497     { &hf_gearman_func_namez, { "Function Name", "gearman.func.name", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 498     { &hf_gearman_client_id, { "Client ID", "gearman.client_id", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 499     { &hf_gearman_uniq_id, { "Unique ID", "gearman.uniq_id", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 500     { &hf_gearman_argument, { "Function Argument", "gearman.func.arg", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 501     { &hf_gearman_job_handle, { "Job Handle", "gearman.job.handle", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 502     { &hf_gearman_job_handlez, { "Job Handle", "gearman.job.handle", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 503     { &hf_gearman_complete_numerator, { "Complete Numerator", "gearman.numerator", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 504     { &hf_gearman_complete_denominator, { "Complete Denominator", "gearman.denominator", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 505     { &hf_gearman_submit_job_sched_minute, { "Minute", "gearman.submit_job_sched.minute", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 506     { &hf_gearman_submit_job_sched_hour, { "Hour", "gearman.submit_job_sched.hour", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 507     { &hf_gearman_submit_job_sched_day_of_month, { "Day of Month", "gearman.submit_job_sched.day_of_month", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 508     { &hf_gearman_submit_job_sched_month, { "Month", "gearman.submit_job_sched.month", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 509     { &hf_gearman_submit_job_sched_day_of_week, { "Day of Week", "gearman.submit_job_sched.day_of_week", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 510     { &hf_gearman_submit_job_epoch_time, { "Epoch Time", "gearman.submit_job.epoch_time", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 511     { &hf_gearman_result, { "Function Result", "gearman.func.result", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 512     { &hf_gearman_known_status, { "Known job", "gearman.job.known", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 513     { &hf_gearman_running_status, { "Running Job", "gearman.job.running", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 514     { &hf_gearman_echo_text, { "Echo Text", "gearman.echo_text", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 515     { &hf_gearman_err_code, { "Error Code", "gearman.err.code", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL} },
 516     { &hf_gearman_err_text, { "Error Text", "gearman.err.text", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL} }
 517   };
 518
 519   /* Setup protocol subtree array */
 520   static gint *ett[] = {
 521     &ett_gearman,
 522     &ett_gearman_command,
 523     &ett_gearman_content
 524   };
 525
 526   static ei_register_info ei[] = {
 527      { &ei_gearman_pkt_type_unknown, { "gearman.pkt_type.unknown", PI_PROTOCOL, PI_WARN, "Unknown command", EXPFILL }},
 528   };
 529
 530   module_t *gearman_module;
 531   expert_module_t* expert_gearman;
 532
 533   proto_gearman = proto_register_protocol("Gearman Protocol", "Gearman", "gearman");
 534
 535   proto_register_field_array(proto_gearman, hf, array_length(hf));
 536   proto_register_subtree_array(ett, array_length(ett));
 537   expert_gearman = expert_register_protocol(proto_gearman);
 538   expert_register_field_array(expert_gearman, ei, array_length(ei));
 539
 540   gearman_module = prefs_register_protocol(proto_gearman, NULL);
 541   prefs_register_bool_preference(gearman_module, "desegment",
 542                                   "Desegment all Gearman messages spanning multiple TCP segments",
 543                                   "Whether the Gearman dissector should desegment all messages spanning multiple TCP segments",
 544                                   &gearman_desegment);
 545
 546 }
 547
 548 void
 549 proto_reg_handoff_gearman(void)
 550 {
 551   dissector_handle_t gearman_handle;
 552
 553   gearman_handle = new_create_dissector_handle(dissect_gearman, proto_gearman);
 554   dissector_add_uint("tcp.port", GEARMAN_PORT, gearman_handle);
 555 }
 556
 557 /*
 558  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 559  *
 560  * Local variables:
 561  * c-basic-offset: 2
 562  * tab-width: 8
 563  * indent-tabs-mode: nil
 564  * End:
 565  *
 566  * vi: set shiftwidth=2 tabstop=8 expandtab:
 567  * :indentSize=2:tabSize=8:noTabs=true:
 568  */