source3/modules/vfs_smb_traffic_analyzer.c

   1 /*
   2  * traffic-analyzer VFS module. Measure the smb traffic users create
   3  * on the net.
   4  *
   5  * Copyright (C) Holger Hetterich, 2008-2010
   6  * Copyright (C) Jeremy Allison, 2008
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include "includes.h"
  23 #include "../lib/crypto/crypto.h"
  24 #include "vfs_smb_traffic_analyzer.h"
  25 #include "../libcli/security/dom_sid.h"
  26 #include "secrets.h"
  27 #include "../librpc/gen_ndr/ndr_netlogon.h"
  28
  29 /* abstraction for the send_over_network function */
  30 enum sock_type {INTERNET_SOCKET = 0, UNIX_DOMAIN_SOCKET};
  31
  32 #define LOCAL_PATHNAME "/var/tmp/stadsocket"
  33
  34 static int vfs_smb_traffic_analyzer_debug_level = DBGC_VFS;
  35
  36 static enum sock_type smb_traffic_analyzer_connMode(vfs_handle_struct *handle)
  37 {
  38         connection_struct *conn = handle->conn;
  39         const char *Mode;
  40         Mode=lp_parm_const_string(SNUM(conn), "smb_traffic_analyzer","mode", \
  41                         "internet_socket");
  42         if (strstr(Mode,"unix_domain_socket")) {
  43                 return UNIX_DOMAIN_SOCKET;
  44         } else {
  45                 return INTERNET_SOCKET;
  46         }
  47 }
  48
  49
  50 /* Connect to an internet socket */
  51 static int smb_traffic_analyzer_connect_inet_socket(vfs_handle_struct *handle,
  52                                         const char *name, uint16_t port)
  53 {
  54         /* Create a streaming Socket */
  55         int sockfd = -1;
  56         struct addrinfo hints;
  57         struct addrinfo *ailist = NULL;
  58         struct addrinfo *res = NULL;
  59         int ret;
  60
  61         ZERO_STRUCT(hints);
  62         /* By default make sure it supports TCP. */
  63         hints.ai_socktype = SOCK_STREAM;
  64         hints.ai_flags = AI_ADDRCONFIG;
  65
  66         ret = getaddrinfo(name,
  67                         NULL,
  68                         &hints,
  69                         &ailist);
  70
  71         if (ret) {
  72                 DEBUG(3,("smb_traffic_analyzer_connect_inet_socket: "
  73                         "getaddrinfo failed for name %s [%s]\n",
  74                         name,
  75                         gai_strerror(ret) ));
  76                 return -1;
  77         }
  78
  79         DEBUG(3,("smb_traffic_analyzer: Internet socket mode. Hostname: %s,"
  80                 "Port: %i\n", name, port));
  81
  82         for (res = ailist; res; res = res->ai_next) {
  83                 struct sockaddr_storage ss;
  84                 NTSTATUS status;
  85
  86                 if (!res->ai_addr || res->ai_addrlen == 0) {
  87                         continue;
  88                 }
  89
  90                 ZERO_STRUCT(ss);
  91                 memcpy(&ss, res->ai_addr, res->ai_addrlen);
  92
  93                 status = open_socket_out(&ss, port, 10000, &sockfd);
  94                 if (NT_STATUS_IS_OK(status)) {
  95                         break;
  96                 }
  97         }
  98
  99         if (ailist) {
 100                 freeaddrinfo(ailist);
 101         }
 102
 103         if (sockfd == -1) {
 104                 DEBUG(1, ("smb_traffic_analyzer: unable to create "
 105                         "socket, error is %s",
 106                         strerror(errno)));
 107                 return -1;
 108         }
 109
 110         return sockfd;
 111 }
 112
 113 /* Connect to a unix domain socket */
 114 static int smb_traffic_analyzer_connect_unix_socket(vfs_handle_struct *handle,
 115                                                 const char *name)
 116 {
 117         /* Create the socket to stad */
 118         int len, sock;
 119         struct sockaddr_un remote;
 120
 121         DEBUG(7, ("smb_traffic_analyzer_connect_unix_socket: "
 122                         "Unix domain socket mode. Using %s\n",
 123                         name ));
 124
 125         if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
 126                 DEBUG(1, ("smb_traffic_analyzer_connect_unix_socket: "
 127                         "Couldn't create socket, "
 128                         "make sure stad is running!\n"));
 129                 return -1;
 130         }
 131         remote.sun_family = AF_UNIX;
 132         strlcpy(remote.sun_path, name,
 133                     sizeof(remote.sun_path));
 134         len=strlen(remote.sun_path) + sizeof(remote.sun_family);
 135         if (connect(sock, (struct sockaddr *)&remote, len) == -1 ) {
 136                 DEBUG(1, ("smb_traffic_analyzer_connect_unix_socket: "
 137                         "Could not connect to "
 138                         "socket, make sure\nstad is running!\n"));
 139                 close(sock);
 140                 return -1;
 141         }
 142         return sock;
 143 }
 144
 145 /* Private data allowing shared connection sockets. */
 146 struct refcounted_sock {
 147         struct refcounted_sock *next, *prev;
 148         char *name;
 149         uint16_t port;
 150         int sock;
 151         unsigned int ref_count;
 152 };
 153
 154
 155 /**
 156  * Encryption of a data block with AES
 157  * TALLOC_CTX *ctx      Talloc context to work on
 158  * const char *akey     128bit key for the encryption
 159  * const char *str      Data buffer to encrypt, \0 terminated
 160  * int *len             Will be set to the length of the
 161  *                      resulting data block
 162  * The caller has to take care for the memory
 163  * allocated on the context.
 164  */
 165 static char *smb_traffic_analyzer_encrypt( TALLOC_CTX *ctx,
 166         const char *akey, const char *str, size_t *len)
 167 {
 168         int s1,s2,h,d;
 169         AES_KEY key;
 170         unsigned char filler[17]= "................";
 171         char *output;
 172         unsigned char crypted[18];
 173         if (akey == NULL) return NULL;
 174         samba_AES_set_encrypt_key((unsigned char *) akey, 128, &key);
 175         s1 = strlen(str) / 16;
 176         s2 = strlen(str) % 16;
 177         for (h = 0; h < s2; h++) *(filler+h)=*(str+(s1*16)+h);
 178         DEBUG(10, ("smb_traffic_analyzer_send_data_socket: created %s"
 179                 " as filling block.\n", filler));
 180         output = talloc_array(ctx, char, (s1*16)+17 );
 181         d=0;
 182         for (h = 0; h < s1; h++) {
 183                 samba_AES_encrypt((unsigned char *) str+(16*h), crypted, &key);
 184                 for (d = 0; d<16; d++) output[d+(16*h)]=crypted[d];
 185         }
 186         samba_AES_encrypt( (unsigned char *) str+(16*h), filler, &key );
 187         for (d = 0;d < 16; d++) output[d+(16*h)]=*(filler+d);
 188         *len = (s1*16)+16;
 189         return output;
 190 }
 191
 192 /**
 193  * Create a v2 header.
 194  * TALLLOC_CTX *ctx             Talloc context to work on
 195  * const char *state_flags      State flag string
 196  * int len                      length of the data block
 197  */
 198 static char *smb_traffic_analyzer_create_header( TALLOC_CTX *ctx,
 199         const char *state_flags, size_t data_len)
 200 {
 201         char *header = talloc_asprintf( ctx, "V2.%s%017u",
 202                                         state_flags, (unsigned int) data_len);
 203         DEBUG(10, ("smb_traffic_analyzer_send_data_socket: created Header:\n"));
 204         dump_data(10, (uint8_t *)header, strlen(header));
 205         return header;
 206 }
 207
 208
 209 /**
 210  * Actually send header and data over the network
 211  * char *header         Header data
 212  * char *data           Data Block
 213  * int dlength          Length of data block
 214  * int socket
 215  */
 216 static void smb_traffic_analyzer_write_data( char *header, char *data,
 217                         int dlength, int _socket)
 218 {
 219                 int len = strlen(header);
 220                 if (write_data( _socket, header, len) != len) {
 221                         DEBUG(1, ("smb_traffic_analyzer_send_data_socket: "
 222                                                 "error sending the header"
 223                                                 " over the socket!\n"));
 224                 }
 225                 DEBUG(10,("smb_traffic_analyzer_write_data: sending data:\n"));
 226                 dump_data( 10, (uint8_t *)data, dlength);
 227
 228                 if (write_data( _socket, data, dlength) != dlength) {
 229                         DEBUG(1, ("smb_traffic_analyzer_write_data: "
 230                                 "error sending crypted data to socket!\n"));
 231                 }
 232 }
 233
 234
 235 /*
 236  * Anonymize a string if required.
 237  * TALLOC_CTX *ctx                      The talloc context to work on
 238  * const char *str                      The string to anonymize
 239  * vfs_handle_struct *handle            The handle struct to work on
 240  *
 241  * Returns a newly allocated string, either the anonymized one,
 242  * or a copy of const char *str. The caller has to take care for
 243  * freeing the allocated memory.
 244  */
 245 static char *smb_traffic_analyzer_anonymize( TALLOC_CTX *ctx,
 246                                         const char *str,
 247                                         vfs_handle_struct *handle )
 248 {
 249         const char *total_anonymization;
 250         const char *anon_prefix;
 251         char *output;
 252         total_anonymization=lp_parm_const_string(SNUM(handle->conn),
 253                                         "smb_traffic_analyzer",
 254                                         "total_anonymization", NULL);
 255
 256         anon_prefix=lp_parm_const_string(SNUM(handle->conn),
 257                                         "smb_traffic_analyzer",
 258                                         "anonymize_prefix", NULL );
 259         if (anon_prefix != NULL) {
 260                 if (total_anonymization != NULL) {
 261                         output = talloc_asprintf(ctx, "%s",
 262                                         anon_prefix);
 263                 } else {
 264                 output = talloc_asprintf(ctx, "%s%i", anon_prefix,
 265                                                 str_checksum(str));
 266                 }
 267         } else {
 268                 output = talloc_asprintf(ctx, "%s", str);
 269         }
 270
 271         return output;
 272 }
 273
 274
 275 /**
 276  * The marshalling function for protocol v2.
 277  * TALLOC_CTX *ctx              Talloc context to work on
 278  * struct tm *tm                tm struct for the timestamp
 279  * int seconds                  milliseconds of the timestamp
 280  * vfs_handle_struct *handle    vfs_handle_struct
 281  * char *username               Name of the user
 282  * int vfs_operation            VFS operation identifier
 283  * int count                    Number of the common data blocks
 284  * [...] variable args          data blocks taken from the individual
 285  *                              VFS data structures
 286  *
 287  * Returns the complete data block to send. The caller has to
 288  * take care for freeing the allocated buffer.
 289  */
 290 static char *smb_traffic_analyzer_create_string( TALLOC_CTX *ctx,
 291         struct tm *tm, int seconds, vfs_handle_struct *handle, \
 292         char *username, int vfs_operation, int count, ... )
 293 {
 294
 295         va_list ap;
 296         char *arg = NULL;
 297         int len;
 298         char *common_data_count_str = NULL;
 299         char *timestr = NULL;
 300         char *sidstr = NULL;
 301         char *usersid = NULL;
 302         char *buf = NULL;
 303         char *vfs_operation_str = NULL;
 304         const char *service_name = lp_const_servicename(handle->conn->params->service);
 305
 306         /*
 307          * first create the data that is transfered with any VFS op
 308          * These are, in the following order:
 309          *(0) number of data to come [6 in v2.0]
 310          * 1.vfs_operation identifier
 311          * 2.username
 312          * 3.user-SID
 313          * 4.affected share
 314          * 5.domain
 315          * 6.timestamp
 316          */
 317
 318         /*
 319          * number of common data blocks to come,
 320          * this is a #define in vfs_smb_traffic_anaylzer.h,
 321          * it's length is known at compile time
 322          */
 323         common_data_count_str = talloc_strdup( ctx, SMBTA_COMMON_DATA_COUNT);
 324         /* vfs operation identifier */
 325         vfs_operation_str = talloc_asprintf( common_data_count_str, "%i",
 326                                                         vfs_operation);
 327         /*
 328          * Handle anonymization. In protocol v2, we have to anonymize
 329          * both the SID and the username. The name is already
 330          * anonymized if needed, by the calling function.
 331          */
 332         usersid = dom_sid_string( common_data_count_str,
 333                 &handle->conn->server_info->ptok->sids[0]);
 334
 335         sidstr = smb_traffic_analyzer_anonymize(
 336                 common_data_count_str,
 337                 usersid,
 338                 handle);
 339
 340         /* time stamp */
 341         timestr = talloc_asprintf( common_data_count_str, \
 342                 "%04d-%02d-%02d %02d:%02d:%02d.%03d", \
 343                 tm->tm_year+1900, \
 344                 tm->tm_mon+1, \
 345                 tm->tm_mday, \
 346                 tm->tm_hour, \
 347                 tm->tm_min, \
 348                 tm->tm_sec, \
 349                 (int)seconds);
 350         len = strlen( timestr );
 351
 352         /* create the string of common data */
 353         buf = talloc_asprintf(ctx,
 354                 "%s%04u%s%04u%s%04u%s%04u%s%04u%s%04u%s",
 355                 common_data_count_str,
 356                 (unsigned int) strlen(vfs_operation_str),
 357                 vfs_operation_str,
 358                 (unsigned int) strlen(username),
 359                 username,
 360                 (unsigned int) strlen(sidstr),
 361                 sidstr,
 362                 (unsigned int) strlen(service_name),
 363                 service_name,
 364                 (unsigned int)
 365                 strlen(handle->conn->server_info->info3->base.domain.string),
 366                 handle->conn->server_info->info3->base.domain.string,
 367                 (unsigned int) strlen(timestr),
 368                 timestr);
 369
 370         talloc_free(common_data_count_str);
 371
 372         /* data blocks depending on the VFS function */
 373         va_start( ap, count );
 374         while ( count-- ) {
 375                 arg = va_arg( ap, char * );
 376                 /*
 377                  *  protocol v2 sends a four byte string
 378                  * as a header to each block, including
 379                  * the numbers of bytes to come in the
 380                  * next string.
 381                  */
 382                 len = strlen( arg );
 383                 buf = talloc_asprintf_append( buf, "%04u%s", len, arg);
 384         }
 385         va_end( ap );
 386         return buf;
 387 }
 388
 389 static void smb_traffic_analyzer_send_data(vfs_handle_struct *handle,
 390                                         void *data,
 391                                         enum vfs_id vfs_operation )
 392 {
 393         struct refcounted_sock *rf_sock = NULL;
 394         struct timeval tv;
 395         time_t tv_sec;
 396         struct tm *tm = NULL;
 397         int seconds;
 398         char *str = NULL;
 399         char *username = NULL;
 400         char *header = NULL;
 401         const char *protocol_version = NULL;
 402         bool Write = false;
 403         size_t len;
 404         size_t size;
 405         char *akey, *output;
 406
 407         /*
 408          * The state flags are part of the header
 409          * and are descripted in the protocol description
 410          * in vfs_smb_traffic_analyzer.h. They begin at byte
 411          * 03 of the header.
 412          */
 413         char state_flags[9] = "000000\0";
 414
 415         SMB_VFS_HANDLE_GET_DATA(handle, rf_sock, struct refcounted_sock, return);
 416
 417         if (rf_sock == NULL || rf_sock->sock == -1) {
 418                 DEBUG(1, ("smb_traffic_analyzer_send_data: socket is "
 419                         "closed\n"));
 420                 return;
 421         }
 422
 423         GetTimeOfDay(&tv);
 424         tv_sec = tv.tv_sec;
 425         tm = localtime(&tv_sec);
 426         if (!tm) {
 427                 return;
 428         }
 429         seconds=(float) (tv.tv_usec / 1000);
 430
 431         /*
 432          * Check if anonymization is required, and if yes do this only for
 433          * the username here, needed vor protocol version 1. In v2 we
 434          * additionally anonymize the SID, which is done in it's marshalling
 435          * function.
 436          */
 437         username = smb_traffic_analyzer_anonymize( talloc_tos(),
 438                         handle->conn->server_info->sanitized_username,
 439                         handle);
 440
 441         if (!username) {
 442                 return;
 443         }
 444
 445         protocol_version = lp_parm_const_string(SNUM(handle->conn),
 446                                         "smb_traffic_analyzer",
 447                                         "protocol_version", NULL );
 448
 449
 450         if ( protocol_version == NULL || strcmp( protocol_version,"V1") == 0) {
 451
 452                 struct rw_data *s_data = (struct rw_data *) data;
 453
 454                 /*
 455                  * in case of protocol v1, ignore any vfs operations
 456                  * except read,pread,write,pwrite, and set the "Write"
 457                  * bool accordingly, send data and return.
 458                  */
 459                 if ( vfs_operation > vfs_id_pwrite ) return;
 460
 461                 if ( vfs_operation <= vfs_id_pread ) Write=false;
 462                         else Write=true;
 463
 464                 str = talloc_asprintf(talloc_tos(),
 465                         "V1,%u,\"%s\",\"%s\",\"%c\",\"%s\",\"%s\","
 466                         "\"%04d-%02d-%02d %02d:%02d:%02d.%03d\"\n",
 467                         (unsigned int) s_data->len,
 468                         username,
 469                         handle->conn->server_info->info3->base.domain.string,
 470                         Write ? 'W' : 'R',
 471                         handle->conn->connectpath,
 472                         s_data->filename,
 473                         tm->tm_year+1900,
 474                         tm->tm_mon+1,
 475                         tm->tm_mday,
 476                         tm->tm_hour,
 477                         tm->tm_min,
 478                         tm->tm_sec,
 479                         (int)seconds);
 480                 len = strlen(str);
 481                 if (write_data(rf_sock->sock, str, len) != len) {
 482                         DEBUG(1, ("smb_traffic_analyzer_send_data_socket: "
 483                         "error sending V1 protocol data to socket!\n"));
 484                 return;
 485                 }
 486
 487         } else if ( strcmp( protocol_version, "V2") == 0) {
 488
 489                 switch( vfs_operation ) {
 490                 case vfs_id_open: ;
 491                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 492                                 tm, seconds, handle, username, vfs_id_open,
 493                                 3, ((struct open_data *) data)->filename,
 494                                 talloc_asprintf( talloc_tos(), "%u",
 495                                 ((struct open_data *) data)->mode),
 496                                 talloc_asprintf( talloc_tos(), "%u",
 497                                 ((struct open_data *) data)->result));
 498                         break;
 499                 case vfs_id_close: ;
 500                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 501                                 tm, seconds, handle, username, vfs_id_close,
 502                                 2, ((struct close_data *) data)->filename,
 503                                 talloc_asprintf( talloc_tos(), "%u",
 504                                 ((struct close_data *) data)->result));
 505                         break;
 506                 case vfs_id_mkdir: ;
 507                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 508                                 tm, seconds, handle, username, vfs_id_mkdir, \
 509                                 3, ((struct mkdir_data *) data)->path, \
 510                                 talloc_asprintf( talloc_tos(), "%u", \
 511                                 ((struct mkdir_data *) data)->mode), \
 512                                 talloc_asprintf( talloc_tos(), "%u", \
 513                                 ((struct mkdir_data *) data)->result ));
 514                         break;
 515                 case vfs_id_rmdir: ;
 516                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 517                                 tm, seconds, handle, username, vfs_id_rmdir,
 518                                 2, ((struct rmdir_data *) data)->path, \
 519                                 talloc_asprintf( talloc_tos(), "%u", \
 520                                 ((struct rmdir_data *) data)->result ));
 521                         break;
 522                 case vfs_id_rename: ;
 523                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 524                                 tm, seconds, handle, username, vfs_id_rename,
 525                                 3, ((struct rename_data *) data)->src, \
 526                                 ((struct rename_data *) data)->dst,
 527                                 talloc_asprintf(talloc_tos(), "%u", \
 528                                 ((struct rename_data *) data)->result));
 529                         break;
 530                 case vfs_id_chdir: ;
 531                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 532                                 tm, seconds, handle, username, vfs_id_chdir,
 533                                 2, ((struct chdir_data *) data)->path, \
 534                                 talloc_asprintf(talloc_tos(), "%u", \
 535                                 ((struct chdir_data *) data)->result));
 536                         break;
 537
 538                 case vfs_id_write:
 539                 case vfs_id_pwrite:
 540                 case vfs_id_read:
 541                 case vfs_id_pread: ;
 542                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 543                                 tm, seconds, handle, username, vfs_operation,
 544                                 2, ((struct rw_data *) data)->filename, \
 545                                 talloc_asprintf(talloc_tos(), "%u", \
 546                                 (unsigned int)
 547                                         ((struct rw_data *) data)->len));
 548                         break;
 549                 default:
 550                         DEBUG(1, ("smb_traffic_analyzer: error! "
 551                                 "wrong VFS operation id detected!\n"));
 552                         return;
 553                 }
 554
 555         } else {
 556                 DEBUG(1, ("smb_traffic_analyzer_send_data_socket: "
 557                         "error, unkown protocol given!\n"));
 558                 return;
 559         }
 560
 561         if (!str) {
 562                 DEBUG(1, ("smb_traffic_analyzer_send_data: "
 563                         "unable to create string to send!\n"));
 564                 return;
 565         }
 566
 567
 568         /*
 569          * If configured, optain the key and run AES encryption
 570          * over the data.
 571          */
 572         become_root();
 573         akey = (char *) secrets_fetch("smb_traffic_analyzer_key", &size);
 574         unbecome_root();
 575         if ( akey != NULL ) {
 576                 state_flags[2] = 'E';
 577                 DEBUG(10, ("smb_traffic_analyzer_send_data_socket: a key was"
 578                         " found, encrypting data!\n"));
 579                 output = smb_traffic_analyzer_encrypt( talloc_tos(),
 580                                                 akey, str, &len);
 581                 header = smb_traffic_analyzer_create_header( talloc_tos(),
 582                                                 state_flags, len);
 583
 584                 DEBUG(10, ("smb_traffic_analyzer_send_data_socket:"
 585                         " header created for crypted data: %s\n", header));
 586                 smb_traffic_analyzer_write_data(header, output, len,
 587                                                         rf_sock->sock);
 588                 return;
 589
 590         }
 591
 592         len = strlen(str);
 593         header = smb_traffic_analyzer_create_header( talloc_tos(),
 594                                 state_flags, len);
 595         smb_traffic_analyzer_write_data(header, str, strlen(str),
 596                                 rf_sock->sock);
 597
 598 }
 599
 600 static struct refcounted_sock *sock_list;
 601
 602 static void smb_traffic_analyzer_free_data(void **pptr)
 603 {
 604         struct refcounted_sock *rf_sock = *(struct refcounted_sock **)pptr;
 605         if (rf_sock == NULL) {
 606                 return;
 607         }
 608         rf_sock->ref_count--;
 609         if (rf_sock->ref_count != 0) {
 610                 return;
 611         }
 612         if (rf_sock->sock != -1) {
 613                 close(rf_sock->sock);
 614         }
 615         DLIST_REMOVE(sock_list, rf_sock);
 616         TALLOC_FREE(rf_sock);
 617 }
 618
 619 static int smb_traffic_analyzer_connect(struct vfs_handle_struct *handle,
 620                          const char *service,
 621                          const char *user)
 622 {
 623         connection_struct *conn = handle->conn;
 624         enum sock_type st = smb_traffic_analyzer_connMode(handle);
 625         struct refcounted_sock *rf_sock = NULL;
 626         const char *name = (st == UNIX_DOMAIN_SOCKET) ? LOCAL_PATHNAME :
 627                                 lp_parm_const_string(SNUM(conn),
 628                                         "smb_traffic_analyzer",
 629                                 "host", "localhost");
 630         uint16_t port = (st == UNIX_DOMAIN_SOCKET) ? 0 :
 631                                 atoi( lp_parm_const_string(SNUM(conn),
 632                                 "smb_traffic_analyzer", "port", "9430"));
 633         int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
 634
 635         if (ret < 0) {
 636                 return ret;
 637         }
 638
 639         /* Are we already connected ? */
 640         for (rf_sock = sock_list; rf_sock; rf_sock = rf_sock->next) {
 641                 if (port == rf_sock->port &&
 642                                 (strcmp(name, rf_sock->name) == 0)) {
 643                         break;
 644                 }
 645         }
 646
 647         /* If we're connected already, just increase the
 648          * reference count. */
 649         if (rf_sock) {
 650                 rf_sock->ref_count++;
 651         } else {
 652                 /* New connection. */
 653                 rf_sock = TALLOC_ZERO_P(NULL, struct refcounted_sock);
 654                 if (rf_sock == NULL) {
 655                         SMB_VFS_NEXT_DISCONNECT(handle);
 656                         errno = ENOMEM;
 657                         return -1;
 658                 }
 659                 rf_sock->name = talloc_strdup(rf_sock, name);
 660                 if (rf_sock->name == NULL) {
 661                         SMB_VFS_NEXT_DISCONNECT(handle);
 662                         TALLOC_FREE(rf_sock);
 663                         errno = ENOMEM;
 664                         return -1;
 665                 }
 666                 rf_sock->port = port;
 667                 rf_sock->ref_count = 1;
 668
 669                 if (st == UNIX_DOMAIN_SOCKET) {
 670                         rf_sock->sock = smb_traffic_analyzer_connect_unix_socket(handle,
 671                                                         name);
 672                 } else {
 673
 674                         rf_sock->sock = smb_traffic_analyzer_connect_inet_socket(handle,
 675                                                         name,
 676                                                         port);
 677                 }
 678                 if (rf_sock->sock == -1) {
 679                         SMB_VFS_NEXT_DISCONNECT(handle);
 680                         TALLOC_FREE(rf_sock);
 681                         return -1;
 682                 }
 683                 DLIST_ADD(sock_list, rf_sock);
 684         }
 685
 686         /* Store the private data. */
 687         SMB_VFS_HANDLE_SET_DATA(handle, rf_sock, smb_traffic_analyzer_free_data,
 688                                 struct refcounted_sock, return -1);
 689         return 0;
 690 }
 691
 692 /* VFS Functions */
 693 static int smb_traffic_analyzer_chdir(vfs_handle_struct *handle, \
 694                         const char *path)
 695 {
 696         struct chdir_data s_data;
 697         s_data.result = SMB_VFS_NEXT_CHDIR(handle, path);
 698         s_data.path = path;
 699         DEBUG(10, ("smb_traffic_analyzer_chdir: CHDIR: %s\n", path));
 700         smb_traffic_analyzer_send_data(handle, &s_data, vfs_id_chdir);
 701         return s_data.result;
 702 }
 703
 704 static int smb_traffic_analyzer_rename(vfs_handle_struct *handle, \
 705                 const struct smb_filename *smb_fname_src,
 706                 const struct smb_filename *smb_fname_dst)
 707 {
 708         struct rename_data s_data;
 709         s_data.result = SMB_VFS_NEXT_RENAME(handle, smb_fname_src, \
 710                 smb_fname_dst);
 711         s_data.src = smb_fname_src->base_name;
 712         s_data.dst = smb_fname_dst->base_name;
 713         DEBUG(10, ("smb_traffic_analyzer_rename: RENAME: %s / %s\n",
 714                 smb_fname_src->base_name,
 715                 smb_fname_dst->base_name));
 716         smb_traffic_analyzer_send_data(handle, &s_data, vfs_id_rename);
 717         return s_data.result;
 718 }
 719
 720 static int smb_traffic_analyzer_rmdir(vfs_handle_struct *handle, \
 721                         const char *path)
 722 {
 723         struct rmdir_data s_data;
 724         s_data.result = SMB_VFS_NEXT_RMDIR(handle, path);
 725         s_data.path = path;
 726         DEBUG(10, ("smb_traffic_analyzer_rmdir: RMDIR: %s\n", path));
 727         smb_traffic_analyzer_send_data(handle, &s_data, vfs_id_rmdir);
 728         return s_data.result;
 729 }
 730
 731 static int smb_traffic_analyzer_mkdir(vfs_handle_struct *handle, \
 732                         const char *path, mode_t mode)
 733 {
 734         struct mkdir_data s_data;
 735         s_data.result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
 736         s_data.path = path;
 737         s_data.mode = mode;
 738         DEBUG(10, ("smb_traffic_analyzer_mkdir: MKDIR: %s\n", path));
 739         smb_traffic_analyzer_send_data(handle,
 740                         &s_data,
 741                         vfs_id_mkdir);
 742         return s_data.result;
 743 }
 744
 745 static ssize_t smb_traffic_analyzer_read(vfs_handle_struct *handle, \
 746                                 files_struct *fsp, void *data, size_t n)
 747 {
 748         struct rw_data s_data;
 749
 750         s_data.len = SMB_VFS_NEXT_READ(handle, fsp, data, n);
 751         s_data.filename = fsp->fsp_name->base_name;
 752         DEBUG(10, ("smb_traffic_analyzer_read: READ: %s\n", fsp_str_dbg(fsp)));
 753
 754         smb_traffic_analyzer_send_data(handle,
 755                         &s_data,
 756                         vfs_id_read);
 757         return s_data.len;
 758 }
 759
 760
 761 static ssize_t smb_traffic_analyzer_pread(vfs_handle_struct *handle, \
 762                 files_struct *fsp, void *data, size_t n, SMB_OFF_T offset)
 763 {
 764         struct rw_data s_data;
 765
 766         s_data.len = SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
 767         s_data.filename = fsp->fsp_name->base_name;
 768         DEBUG(10, ("smb_traffic_analyzer_pread: PREAD: %s\n",
 769                    fsp_str_dbg(fsp)));
 770
 771         smb_traffic_analyzer_send_data(handle,
 772                         &s_data,
 773                         vfs_id_pread);
 774
 775         return s_data.len;
 776 }
 777
 778 static ssize_t smb_traffic_analyzer_write(vfs_handle_struct *handle, \
 779                         files_struct *fsp, const void *data, size_t n)
 780 {
 781         struct rw_data s_data;
 782
 783         s_data.len = SMB_VFS_NEXT_WRITE(handle, fsp, data, n);
 784         s_data.filename = fsp->fsp_name->base_name;
 785         DEBUG(10, ("smb_traffic_analyzer_write: WRITE: %s\n",
 786                    fsp_str_dbg(fsp)));
 787
 788         smb_traffic_analyzer_send_data(handle,
 789                         &s_data,
 790                         vfs_id_write);
 791         return s_data.len;
 792 }
 793
 794 static ssize_t smb_traffic_analyzer_pwrite(vfs_handle_struct *handle, \
 795              files_struct *fsp, const void *data, size_t n, SMB_OFF_T offset)
 796 {
 797         struct rw_data s_data;
 798
 799         s_data.len = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
 800         s_data.filename = fsp->fsp_name->base_name;
 801         DEBUG(10, ("smb_traffic_analyzer_pwrite: PWRITE: %s\n", \
 802                 fsp_str_dbg(fsp)));
 803
 804         smb_traffic_analyzer_send_data(handle,
 805                         &s_data,
 806                         vfs_id_pwrite);
 807         return s_data.len;
 808 }
 809
 810 static int smb_traffic_analyzer_open(vfs_handle_struct *handle, \
 811         struct smb_filename *smb_fname, files_struct *fsp,\
 812         int flags, mode_t mode)
 813 {
 814         struct open_data s_data;
 815
 816         s_data.result = SMB_VFS_NEXT_OPEN( handle, smb_fname, fsp,
 817                         flags, mode);
 818         DEBUG(10,("smb_traffic_analyzer_open: OPEN: %s\n",
 819                 fsp_str_dbg(fsp)));
 820         s_data.filename = fsp->fsp_name->base_name;
 821         s_data.mode = mode;
 822         smb_traffic_analyzer_send_data(handle,
 823                         &s_data,
 824                         vfs_id_open);
 825         return s_data.result;
 826 }
 827
 828 static int smb_traffic_analyzer_close(vfs_handle_struct *handle, \
 829         files_struct *fsp)
 830 {
 831         struct close_data s_data;
 832         s_data.result = SMB_VFS_NEXT_CLOSE(handle, fsp);
 833         DEBUG(10,("smb_traffic_analyzer_close: CLOSE: %s\n",
 834                 fsp_str_dbg(fsp)));
 835         s_data.filename = fsp->fsp_name->base_name;
 836         smb_traffic_analyzer_send_data(handle,
 837                         &s_data,
 838                         vfs_id_close);
 839         return s_data.result;
 840 }
 841
 842
 843 static struct vfs_fn_pointers vfs_smb_traffic_analyzer_fns = {
 844         .connect_fn = smb_traffic_analyzer_connect,
 845         .vfs_read = smb_traffic_analyzer_read,
 846         .pread = smb_traffic_analyzer_pread,
 847         .write = smb_traffic_analyzer_write,
 848         .pwrite = smb_traffic_analyzer_pwrite,
 849         .mkdir = smb_traffic_analyzer_mkdir,
 850         .rename = smb_traffic_analyzer_rename,
 851         .chdir = smb_traffic_analyzer_chdir,
 852         .open = smb_traffic_analyzer_open,
 853         .rmdir = smb_traffic_analyzer_rmdir,
 854         .close_fn = smb_traffic_analyzer_close
 855 };
 856
 857 /* Module initialization */
 858 NTSTATUS vfs_smb_traffic_analyzer_init(void)
 859 {
 860         NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
 861                                         "smb_traffic_analyzer",
 862                                         &vfs_smb_traffic_analyzer_fns);
 863
 864         if (!NT_STATUS_IS_OK(ret)) {
 865                 return ret;
 866         }
 867
 868         vfs_smb_traffic_analyzer_debug_level =
 869                 debug_add_class("smb_traffic_analyzer");
 870
 871         if (vfs_smb_traffic_analyzer_debug_level == -1) {
 872                 vfs_smb_traffic_analyzer_debug_level = DBGC_VFS;
 873                 DEBUG(1, ("smb_traffic_analyzer_init: Couldn't register custom"
 874                          "debugging class!\n"));
 875         } else {
 876                 DEBUG(3, ("smb_traffic_analyzer_init: Debug class number of"
 877                         "'smb_traffic_analyzer': %d\n", \
 878                         vfs_smb_traffic_analyzer_debug_level));
 879         }
 880
 881         return ret;
 882 }