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 "smbd/smbd.h"
  24 #include "../smbd/globals.h"
  25 #include "../lib/crypto/crypto.h"
  26 #include "vfs_smb_traffic_analyzer.h"
  27 #include "../libcli/security/security.h"
  28 #include "secrets.h"
  29 #include "../librpc/gen_ndr/ndr_netlogon.h"
  30 #include "auth.h"
  31
  32 /* abstraction for the send_over_network function */
  33 enum sock_type {INTERNET_SOCKET = 0, UNIX_DOMAIN_SOCKET};
  34
  35 #define LOCAL_PATHNAME "/var/tmp/stadsocket"
  36
  37 static int vfs_smb_traffic_analyzer_debug_level = DBGC_VFS;
  38
  39 static enum sock_type smb_traffic_analyzer_connMode(vfs_handle_struct *handle)
  40 {
  41         connection_struct *conn = handle->conn;
  42         const char *Mode;
  43         Mode=lp_parm_const_string(SNUM(conn), "smb_traffic_analyzer","mode", \
  44                         "internet_socket");
  45         if (strstr(Mode,"unix_domain_socket")) {
  46                 return UNIX_DOMAIN_SOCKET;
  47         } else {
  48                 return INTERNET_SOCKET;
  49         }
  50 }
  51
  52
  53 /* Connect to an internet socket */
  54 static int smb_traffic_analyzer_connect_inet_socket(vfs_handle_struct *handle,
  55                                         const char *name, uint16_t port)
  56 {
  57         /* Create a streaming Socket */
  58         int sockfd = -1;
  59         struct addrinfo hints;
  60         struct addrinfo *ailist = NULL;
  61         struct addrinfo *res = NULL;
  62         int ret;
  63
  64         ZERO_STRUCT(hints);
  65         /* By default make sure it supports TCP. */
  66         hints.ai_socktype = SOCK_STREAM;
  67         hints.ai_flags = AI_ADDRCONFIG;
  68
  69         ret = getaddrinfo(name,
  70                         NULL,
  71                         &hints,
  72                         &ailist);
  73
  74         if (ret) {
  75                 DEBUG(3,("smb_traffic_analyzer_connect_inet_socket: "
  76                         "getaddrinfo failed for name %s [%s]\n",
  77                         name,
  78                         gai_strerror(ret) ));
  79                 return -1;
  80         }
  81
  82         DEBUG(3,("smb_traffic_analyzer: Internet socket mode. Hostname: %s,"
  83                 "Port: %i\n", name, port));
  84
  85         for (res = ailist; res; res = res->ai_next) {
  86                 struct sockaddr_storage ss;
  87                 NTSTATUS status;
  88
  89                 if (!res->ai_addr || res->ai_addrlen == 0) {
  90                         continue;
  91                 }
  92
  93                 ZERO_STRUCT(ss);
  94                 memcpy(&ss, res->ai_addr, res->ai_addrlen);
  95
  96                 status = open_socket_out(&ss, port, 10000, &sockfd);
  97                 if (NT_STATUS_IS_OK(status)) {
  98                         break;
  99                 }
 100         }
 101
 102         if (ailist) {
 103                 freeaddrinfo(ailist);
 104         }
 105
 106         if (sockfd == -1) {
 107                 DEBUG(1, ("smb_traffic_analyzer: unable to create "
 108                         "socket, error is %s",
 109                         strerror(errno)));
 110                 return -1;
 111         }
 112
 113         return sockfd;
 114 }
 115
 116 /* Connect to a unix domain socket */
 117 static int smb_traffic_analyzer_connect_unix_socket(vfs_handle_struct *handle,
 118                                                 const char *name)
 119 {
 120         /* Create the socket to stad */
 121         int len, sock;
 122         struct sockaddr_un remote;
 123
 124         DEBUG(7, ("smb_traffic_analyzer_connect_unix_socket: "
 125                         "Unix domain socket mode. Using %s\n",
 126                         name ));
 127
 128         if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
 129                 DEBUG(1, ("smb_traffic_analyzer_connect_unix_socket: "
 130                         "Couldn't create socket, "
 131                         "make sure stad is running!\n"));
 132                 return -1;
 133         }
 134         remote.sun_family = AF_UNIX;
 135         strlcpy(remote.sun_path, name,
 136                     sizeof(remote.sun_path));
 137         len=strlen(remote.sun_path) + sizeof(remote.sun_family);
 138         if (connect(sock, (struct sockaddr *)&remote, len) == -1 ) {
 139                 DEBUG(1, ("smb_traffic_analyzer_connect_unix_socket: "
 140                         "Could not connect to "
 141                         "socket, make sure\nstad is running!\n"));
 142                 close(sock);
 143                 return -1;
 144         }
 145         return sock;
 146 }
 147
 148 /* Private data allowing shared connection sockets. */
 149 struct refcounted_sock {
 150         struct refcounted_sock *next, *prev;
 151         char *name;
 152         uint16_t port;
 153         int sock;
 154         unsigned int ref_count;
 155 };
 156
 157
 158 /**
 159  * Encryption of a data block with AES
 160  * TALLOC_CTX *ctx      Talloc context to work on
 161  * const char *akey     128bit key for the encryption
 162  * const char *str      Data buffer to encrypt, \0 terminated
 163  * int *len             Will be set to the length of the
 164  *                      resulting data block
 165  * The caller has to take care for the memory
 166  * allocated on the context.
 167  */
 168 static char *smb_traffic_analyzer_encrypt( TALLOC_CTX *ctx,
 169         const char *akey, const char *str, size_t *len)
 170 {
 171         int s1,s2,h,d;
 172         AES_KEY key;
 173         unsigned char filler[17]= "................";
 174         char *output;
 175         unsigned char crypted[18];
 176         if (akey == NULL) return NULL;
 177         samba_AES_set_encrypt_key((unsigned char *) akey, 128, &key);
 178         s1 = strlen(str) / 16;
 179         s2 = strlen(str) % 16;
 180         for (h = 0; h < s2; h++) *(filler+h)=*(str+(s1*16)+h);
 181         DEBUG(10, ("smb_traffic_analyzer_send_data_socket: created %s"
 182                 " as filling block.\n", filler));
 183         output = talloc_array(ctx, char, (s1*16)+17 );
 184         d=0;
 185         for (h = 0; h < s1; h++) {
 186                 samba_AES_encrypt((unsigned char *) str+(16*h), crypted, &key);
 187                 for (d = 0; d<16; d++) output[d+(16*h)]=crypted[d];
 188         }
 189         samba_AES_encrypt( (unsigned char *) str+(16*h), filler, &key );
 190         for (d = 0;d < 16; d++) output[d+(16*h)]=*(filler+d);
 191         *len = (s1*16)+16;
 192         return output;
 193 }
 194
 195 /**
 196  * Create a v2 header.
 197  * TALLLOC_CTX *ctx             Talloc context to work on
 198  * const char *state_flags      State flag string
 199  * int len                      length of the data block
 200  */
 201 static char *smb_traffic_analyzer_create_header( TALLOC_CTX *ctx,
 202         const char *state_flags, size_t data_len)
 203 {
 204         char *header = talloc_asprintf( ctx, "V2.%s%017u",
 205                                         state_flags, (unsigned int) data_len);
 206         DEBUG(10, ("smb_traffic_analyzer_send_data_socket: created Header:\n"));
 207         dump_data(10, (uint8_t *)header, strlen(header));
 208         return header;
 209 }
 210
 211
 212 /**
 213  * Actually send header and data over the network
 214  * char *header         Header data
 215  * char *data           Data Block
 216  * int dlength          Length of data block
 217  * int socket
 218  */
 219 static void smb_traffic_analyzer_write_data( char *header, char *data,
 220                         int dlength, int _socket)
 221 {
 222                 int len = strlen(header);
 223                 if (write_data( _socket, header, len) != len) {
 224                         DEBUG(1, ("smb_traffic_analyzer_send_data_socket: "
 225                                                 "error sending the header"
 226                                                 " over the socket!\n"));
 227                 }
 228                 DEBUG(10,("smb_traffic_analyzer_write_data: sending data:\n"));
 229                 dump_data( 10, (uint8_t *)data, dlength);
 230
 231                 if (write_data( _socket, data, dlength) != dlength) {
 232                         DEBUG(1, ("smb_traffic_analyzer_write_data: "
 233                                 "error sending crypted data to socket!\n"));
 234                 }
 235 }
 236
 237
 238 /*
 239  * Anonymize a string if required.
 240  * TALLOC_CTX *ctx                      The talloc context to work on
 241  * const char *str                      The string to anonymize
 242  * vfs_handle_struct *handle            The handle struct to work on
 243  *
 244  * Returns a newly allocated string, either the anonymized one,
 245  * or a copy of const char *str. The caller has to take care for
 246  * freeing the allocated memory.
 247  */
 248 static char *smb_traffic_analyzer_anonymize( TALLOC_CTX *ctx,
 249                                         const char *str,
 250                                         vfs_handle_struct *handle )
 251 {
 252         const char *total_anonymization;
 253         const char *anon_prefix;
 254         char *output;
 255         total_anonymization=lp_parm_const_string(SNUM(handle->conn),
 256                                         "smb_traffic_analyzer",
 257                                         "total_anonymization", NULL);
 258
 259         anon_prefix=lp_parm_const_string(SNUM(handle->conn),
 260                                         "smb_traffic_analyzer",
 261                                         "anonymize_prefix", NULL );
 262         if (anon_prefix != NULL) {
 263                 if (total_anonymization != NULL) {
 264                         output = talloc_asprintf(ctx, "%s",
 265                                         anon_prefix);
 266                 } else {
 267                 output = talloc_asprintf(ctx, "%s%i", anon_prefix,
 268                                                 str_checksum(str));
 269                 }
 270         } else {
 271                 output = talloc_asprintf(ctx, "%s", str);
 272         }
 273
 274         return output;
 275 }
 276
 277
 278 /**
 279  * The marshalling function for protocol v2.
 280  * TALLOC_CTX *ctx              Talloc context to work on
 281  * struct tm *tm                tm struct for the timestamp
 282  * int seconds                  milliseconds of the timestamp
 283  * vfs_handle_struct *handle    vfs_handle_struct
 284  * char *username               Name of the user
 285  * int vfs_operation            VFS operation identifier
 286  * int count                    Number of the common data blocks
 287  * [...] variable args          data blocks taken from the individual
 288  *                              VFS data structures
 289  *
 290  * Returns the complete data block to send. The caller has to
 291  * take care for freeing the allocated buffer.
 292  */
 293 static char *smb_traffic_analyzer_create_string( TALLOC_CTX *ctx,
 294         struct tm *tm, int seconds, vfs_handle_struct *handle, \
 295         char *username, int vfs_operation, int count, ... )
 296 {
 297
 298         va_list ap;
 299         char *arg = NULL;
 300         int len;
 301         char *common_data_count_str = NULL;
 302         char *timestr = NULL;
 303         char *sidstr = NULL;
 304         char *usersid = NULL;
 305         char *buf = NULL;
 306         char *vfs_operation_str = NULL;
 307         const char *service_name = lp_const_servicename(handle->conn->params->service);
 308
 309         /*
 310          * first create the data that is transfered with any VFS op
 311          * These are, in the following order:
 312          *(0) number of data to come [6 in v2.0]
 313          * 1.vfs_operation identifier
 314          * 2.username
 315          * 3.user-SID
 316          * 4.affected share
 317          * 5.domain
 318          * 6.timestamp
 319          * 7.IP Addresss of client
 320          */
 321
 322         /*
 323          * number of common data blocks to come,
 324          * this is a #define in vfs_smb_traffic_anaylzer.h,
 325          * it's length is known at compile time
 326          */
 327         common_data_count_str = talloc_strdup( ctx, SMBTA_COMMON_DATA_COUNT);
 328         /* vfs operation identifier */
 329         vfs_operation_str = talloc_asprintf( common_data_count_str, "%i",
 330                                                         vfs_operation);
 331         /*
 332          * Handle anonymization. In protocol v2, we have to anonymize
 333          * both the SID and the username. The name is already
 334          * anonymized if needed, by the calling function.
 335          */
 336         usersid = dom_sid_string( common_data_count_str,
 337                 &handle->conn->session_info->security_token->sids[0]);
 338
 339         sidstr = smb_traffic_analyzer_anonymize(
 340                 common_data_count_str,
 341                 usersid,
 342                 handle);
 343
 344         /* time stamp */
 345         timestr = talloc_asprintf( common_data_count_str, \
 346                 "%04d-%02d-%02d %02d:%02d:%02d.%03d", \
 347                 tm->tm_year+1900, \
 348                 tm->tm_mon+1, \
 349                 tm->tm_mday, \
 350                 tm->tm_hour, \
 351                 tm->tm_min, \
 352                 tm->tm_sec, \
 353                 (int)seconds);
 354         len = strlen( timestr );
 355         /* create the string of common data */
 356         buf = talloc_asprintf(ctx,
 357                 "%s%04u%s%04u%s%04u%s%04u%s%04u%s%04u%s%04u%s",
 358                 common_data_count_str,
 359                 (unsigned int) strlen(vfs_operation_str),
 360                 vfs_operation_str,
 361                 (unsigned int) strlen(username),
 362                 username,
 363                 (unsigned int) strlen(sidstr),
 364                 sidstr,
 365                 (unsigned int) strlen(service_name),
 366                 service_name,
 367                 (unsigned int)
 368                 strlen(handle->conn->session_info->info3->base.domain.string),
 369                 handle->conn->session_info->info3->base.domain.string,
 370                 (unsigned int) strlen(timestr),
 371                 timestr,
 372                 (unsigned int) strlen(handle->conn->sconn->client_id.addr),
 373                 handle->conn->sconn->client_id.addr);
 374
 375         talloc_free(common_data_count_str);
 376
 377         /* data blocks depending on the VFS function */
 378         va_start( ap, count );
 379         while ( count-- ) {
 380                 arg = va_arg( ap, char * );
 381                 /*
 382                  *  protocol v2 sends a four byte string
 383                  * as a header to each block, including
 384                  * the numbers of bytes to come in the
 385                  * next string.
 386                  */
 387                 len = strlen( arg );
 388                 buf = talloc_asprintf_append( buf, "%04u%s", len, arg);
 389         }
 390         va_end( ap );
 391         return buf;
 392 }
 393
 394 static void smb_traffic_analyzer_send_data(vfs_handle_struct *handle,
 395                                         void *data,
 396                                         enum vfs_id vfs_operation )
 397 {
 398         struct refcounted_sock *rf_sock = NULL;
 399         struct timeval tv;
 400         time_t tv_sec;
 401         struct tm *tm = NULL;
 402         int seconds;
 403         char *str = NULL;
 404         char *username = NULL;
 405         char *header = NULL;
 406         const char *protocol_version = NULL;
 407         bool Write = false;
 408         size_t len;
 409         size_t size;
 410         char *akey, *output;
 411
 412         /*
 413          * The state flags are part of the header
 414          * and are descripted in the protocol description
 415          * in vfs_smb_traffic_analyzer.h. They begin at byte
 416          * 03 of the header.
 417          */
 418         char state_flags[9] = "000000\0";
 419
 420         SMB_VFS_HANDLE_GET_DATA(handle, rf_sock, struct refcounted_sock, return);
 421
 422         if (rf_sock == NULL || rf_sock->sock == -1) {
 423                 DEBUG(1, ("smb_traffic_analyzer_send_data: socket is "
 424                         "closed\n"));
 425                 return;
 426         }
 427
 428         GetTimeOfDay(&tv);
 429         tv_sec = tv.tv_sec;
 430         tm = localtime(&tv_sec);
 431         if (!tm) {
 432                 return;
 433         }
 434         seconds=(float) (tv.tv_usec / 1000);
 435
 436         /*
 437          * Check if anonymization is required, and if yes do this only for
 438          * the username here, needed vor protocol version 1. In v2 we
 439          * additionally anonymize the SID, which is done in it's marshalling
 440          * function.
 441          */
 442         username = smb_traffic_analyzer_anonymize( talloc_tos(),
 443                         handle->conn->session_info->sanitized_username,
 444                         handle);
 445
 446         if (!username) {
 447                 return;
 448         }
 449
 450         protocol_version = lp_parm_const_string(SNUM(handle->conn),
 451                                         "smb_traffic_analyzer",
 452                                         "protocol_version", NULL );
 453
 454
 455         if ( protocol_version == NULL || strcmp( protocol_version,"V1") == 0) {
 456
 457                 struct rw_data *s_data = (struct rw_data *) data;
 458
 459                 /*
 460                  * in case of protocol v1, ignore any vfs operations
 461                  * except read,pread,write,pwrite, and set the "Write"
 462                  * bool accordingly, send data and return.
 463                  */
 464                 if ( vfs_operation > vfs_id_pwrite ) return;
 465
 466                 if ( vfs_operation <= vfs_id_pread ) Write=false;
 467                         else Write=true;
 468
 469                 str = talloc_asprintf(talloc_tos(),
 470                         "V1,%u,\"%s\",\"%s\",\"%c\",\"%s\",\"%s\","
 471                         "\"%04d-%02d-%02d %02d:%02d:%02d.%03d\"\n",
 472                         (unsigned int) s_data->len,
 473                         username,
 474                         handle->conn->session_info->info3->base.domain.string,
 475                         Write ? 'W' : 'R',
 476                         handle->conn->connectpath,
 477                         s_data->filename,
 478                         tm->tm_year+1900,
 479                         tm->tm_mon+1,
 480                         tm->tm_mday,
 481                         tm->tm_hour,
 482                         tm->tm_min,
 483                         tm->tm_sec,
 484                         (int)seconds);
 485                 len = strlen(str);
 486                 if (write_data(rf_sock->sock, str, len) != len) {
 487                         DEBUG(1, ("smb_traffic_analyzer_send_data_socket: "
 488                         "error sending V1 protocol data to socket!\n"));
 489                 return;
 490                 }
 491
 492         } else if ( strcmp( protocol_version, "V2") == 0) {
 493
 494                 switch( vfs_operation ) {
 495                 case vfs_id_open: ;
 496                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 497                                 tm, seconds, handle, username, vfs_id_open,
 498                                 3, ((struct open_data *) data)->filename,
 499                                 talloc_asprintf( talloc_tos(), "%u",
 500                                 ((struct open_data *) data)->mode),
 501                                 talloc_asprintf( talloc_tos(), "%u",
 502                                 ((struct open_data *) data)->result));
 503                         break;
 504                 case vfs_id_close: ;
 505                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 506                                 tm, seconds, handle, username, vfs_id_close,
 507                                 2, ((struct close_data *) data)->filename,
 508                                 talloc_asprintf( talloc_tos(), "%u",
 509                                 ((struct close_data *) data)->result));
 510                         break;
 511                 case vfs_id_mkdir: ;
 512                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 513                                 tm, seconds, handle, username, vfs_id_mkdir, \
 514                                 3, ((struct mkdir_data *) data)->path, \
 515                                 talloc_asprintf( talloc_tos(), "%u", \
 516                                 ((struct mkdir_data *) data)->mode), \
 517                                 talloc_asprintf( talloc_tos(), "%u", \
 518                                 ((struct mkdir_data *) data)->result ));
 519                         break;
 520                 case vfs_id_rmdir: ;
 521                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 522                                 tm, seconds, handle, username, vfs_id_rmdir,
 523                                 2, ((struct rmdir_data *) data)->path, \
 524                                 talloc_asprintf( talloc_tos(), "%u", \
 525                                 ((struct rmdir_data *) data)->result ));
 526                         break;
 527                 case vfs_id_rename: ;
 528                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 529                                 tm, seconds, handle, username, vfs_id_rename,
 530                                 3, ((struct rename_data *) data)->src, \
 531                                 ((struct rename_data *) data)->dst,
 532                                 talloc_asprintf(talloc_tos(), "%u", \
 533                                 ((struct rename_data *) data)->result));
 534                         break;
 535                 case vfs_id_chdir: ;
 536                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 537                                 tm, seconds, handle, username, vfs_id_chdir,
 538                                 2, ((struct chdir_data *) data)->path, \
 539                                 talloc_asprintf(talloc_tos(), "%u", \
 540                                 ((struct chdir_data *) data)->result));
 541                         break;
 542
 543                 case vfs_id_write:
 544                 case vfs_id_pwrite:
 545                 case vfs_id_read:
 546                 case vfs_id_pread: ;
 547                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 548                                 tm, seconds, handle, username, vfs_operation,
 549                                 2, ((struct rw_data *) data)->filename, \
 550                                 talloc_asprintf(talloc_tos(), "%u", \
 551                                 (unsigned int)
 552                                         ((struct rw_data *) data)->len));
 553                         break;
 554                 default:
 555                         DEBUG(1, ("smb_traffic_analyzer: error! "
 556                                 "wrong VFS operation id detected!\n"));
 557                         return;
 558                 }
 559
 560         } else {
 561                 DEBUG(1, ("smb_traffic_analyzer_send_data_socket: "
 562                         "error, unknown protocol given!\n"));
 563                 return;
 564         }
 565
 566         if (!str) {
 567                 DEBUG(1, ("smb_traffic_analyzer_send_data: "
 568                         "unable to create string to send!\n"));
 569                 return;
 570         }
 571
 572
 573         /*
 574          * If configured, optain the key and run AES encryption
 575          * over the data.
 576          */
 577         become_root();
 578         akey = (char *) secrets_fetch("smb_traffic_analyzer_key", &size);
 579         unbecome_root();
 580         if ( akey != NULL ) {
 581                 state_flags[2] = 'E';
 582                 DEBUG(10, ("smb_traffic_analyzer_send_data_socket: a key was"
 583                         " found, encrypting data!\n"));
 584                 output = smb_traffic_analyzer_encrypt( talloc_tos(),
 585                                                 akey, str, &len);
 586                 SAFE_FREE(akey);
 587                 header = smb_traffic_analyzer_create_header( talloc_tos(),
 588                                                 state_flags, len);
 589
 590                 DEBUG(10, ("smb_traffic_analyzer_send_data_socket:"
 591                         " header created for crypted data: %s\n", header));
 592                 smb_traffic_analyzer_write_data(header, output, len,
 593                                                         rf_sock->sock);
 594                 return;
 595
 596         }
 597
 598         len = strlen(str);
 599         header = smb_traffic_analyzer_create_header( talloc_tos(),
 600                                 state_flags, len);
 601         smb_traffic_analyzer_write_data(header, str, strlen(str),
 602                                 rf_sock->sock);
 603
 604 }
 605
 606 static struct refcounted_sock *sock_list;
 607
 608 static void smb_traffic_analyzer_free_data(void **pptr)
 609 {
 610         struct refcounted_sock *rf_sock = *(struct refcounted_sock **)pptr;
 611         if (rf_sock == NULL) {
 612                 return;
 613         }
 614         rf_sock->ref_count--;
 615         if (rf_sock->ref_count != 0) {
 616                 return;
 617         }
 618         if (rf_sock->sock != -1) {
 619                 close(rf_sock->sock);
 620         }
 621         DLIST_REMOVE(sock_list, rf_sock);
 622         TALLOC_FREE(rf_sock);
 623 }
 624
 625 static int smb_traffic_analyzer_connect(struct vfs_handle_struct *handle,
 626                          const char *service,
 627                          const char *user)
 628 {
 629         connection_struct *conn = handle->conn;
 630         enum sock_type st = smb_traffic_analyzer_connMode(handle);
 631         struct refcounted_sock *rf_sock = NULL;
 632         const char *name = (st == UNIX_DOMAIN_SOCKET) ? LOCAL_PATHNAME :
 633                                 lp_parm_const_string(SNUM(conn),
 634                                         "smb_traffic_analyzer",
 635                                 "host", "localhost");
 636         uint16_t port = (st == UNIX_DOMAIN_SOCKET) ? 0 :
 637                                 atoi( lp_parm_const_string(SNUM(conn),
 638                                 "smb_traffic_analyzer", "port", "9430"));
 639         int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
 640
 641         if (ret < 0) {
 642                 return ret;
 643         }
 644
 645         /* Are we already connected ? */
 646         for (rf_sock = sock_list; rf_sock; rf_sock = rf_sock->next) {
 647                 if (port == rf_sock->port &&
 648                                 (strcmp(name, rf_sock->name) == 0)) {
 649                         break;
 650                 }
 651         }
 652
 653         /* If we're connected already, just increase the
 654          * reference count. */
 655         if (rf_sock) {
 656                 rf_sock->ref_count++;
 657         } else {
 658                 /* New connection. */
 659                 rf_sock = TALLOC_ZERO_P(NULL, struct refcounted_sock);
 660                 if (rf_sock == NULL) {
 661                         SMB_VFS_NEXT_DISCONNECT(handle);
 662                         errno = ENOMEM;
 663                         return -1;
 664                 }
 665                 rf_sock->name = talloc_strdup(rf_sock, name);
 666                 if (rf_sock->name == NULL) {
 667                         SMB_VFS_NEXT_DISCONNECT(handle);
 668                         TALLOC_FREE(rf_sock);
 669                         errno = ENOMEM;
 670                         return -1;
 671                 }
 672                 rf_sock->port = port;
 673                 rf_sock->ref_count = 1;
 674
 675                 if (st == UNIX_DOMAIN_SOCKET) {
 676                         rf_sock->sock = smb_traffic_analyzer_connect_unix_socket(handle,
 677                                                         name);
 678                 } else {
 679
 680                         rf_sock->sock = smb_traffic_analyzer_connect_inet_socket(handle,
 681                                                         name,
 682                                                         port);
 683                 }
 684                 if (rf_sock->sock == -1) {
 685                         SMB_VFS_NEXT_DISCONNECT(handle);
 686                         TALLOC_FREE(rf_sock);
 687                         return -1;
 688                 }
 689                 DLIST_ADD(sock_list, rf_sock);
 690         }
 691
 692         /* Store the private data. */
 693         SMB_VFS_HANDLE_SET_DATA(handle, rf_sock, smb_traffic_analyzer_free_data,
 694                                 struct refcounted_sock, return -1);
 695         return 0;
 696 }
 697
 698 /* VFS Functions */
 699 static int smb_traffic_analyzer_chdir(vfs_handle_struct *handle, \
 700                         const char *path)
 701 {
 702         struct chdir_data s_data;
 703         s_data.result = SMB_VFS_NEXT_CHDIR(handle, path);
 704         s_data.path = path;
 705         DEBUG(10, ("smb_traffic_analyzer_chdir: CHDIR: %s\n", path));
 706         smb_traffic_analyzer_send_data(handle, &s_data, vfs_id_chdir);
 707         return s_data.result;
 708 }
 709
 710 static int smb_traffic_analyzer_rename(vfs_handle_struct *handle, \
 711                 const struct smb_filename *smb_fname_src,
 712                 const struct smb_filename *smb_fname_dst)
 713 {
 714         struct rename_data s_data;
 715         s_data.result = SMB_VFS_NEXT_RENAME(handle, smb_fname_src, \
 716                 smb_fname_dst);
 717         s_data.src = smb_fname_src->base_name;
 718         s_data.dst = smb_fname_dst->base_name;
 719         DEBUG(10, ("smb_traffic_analyzer_rename: RENAME: %s / %s\n",
 720                 smb_fname_src->base_name,
 721                 smb_fname_dst->base_name));
 722         smb_traffic_analyzer_send_data(handle, &s_data, vfs_id_rename);
 723         return s_data.result;
 724 }
 725
 726 static int smb_traffic_analyzer_rmdir(vfs_handle_struct *handle, \
 727                         const char *path)
 728 {
 729         struct rmdir_data s_data;
 730         s_data.result = SMB_VFS_NEXT_RMDIR(handle, path);
 731         s_data.path = path;
 732         DEBUG(10, ("smb_traffic_analyzer_rmdir: RMDIR: %s\n", path));
 733         smb_traffic_analyzer_send_data(handle, &s_data, vfs_id_rmdir);
 734         return s_data.result;
 735 }
 736
 737 static int smb_traffic_analyzer_mkdir(vfs_handle_struct *handle, \
 738                         const char *path, mode_t mode)
 739 {
 740         struct mkdir_data s_data;
 741         s_data.result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
 742         s_data.path = path;
 743         s_data.mode = mode;
 744         DEBUG(10, ("smb_traffic_analyzer_mkdir: MKDIR: %s\n", path));
 745         smb_traffic_analyzer_send_data(handle,
 746                         &s_data,
 747                         vfs_id_mkdir);
 748         return s_data.result;
 749 }
 750
 751 static ssize_t smb_traffic_analyzer_sendfile(vfs_handle_struct *handle,
 752                                 int tofd,
 753                                 files_struct *fromfsp,
 754                                 const DATA_BLOB *hdr,
 755                                 SMB_OFF_T offset,
 756                                 size_t n)
 757 {
 758         struct rw_data s_data;
 759         s_data.len = SMB_VFS_NEXT_SENDFILE(handle,
 760                         tofd, fromfsp, hdr, offset, n);
 761         s_data.filename = fromfsp->fsp_name->base_name;
 762         DEBUG(10, ("smb_traffic_analyzer_sendfile: sendfile(r): %s\n",
 763                 fsp_str_dbg(fromfsp)));
 764         smb_traffic_analyzer_send_data(handle,
 765                 &s_data,
 766                 vfs_id_read);
 767         return s_data.len;
 768 }
 769
 770 static ssize_t smb_traffic_analyzer_recvfile(vfs_handle_struct *handle,
 771                                 int fromfd,
 772                                 files_struct *tofsp,
 773                                 SMB_OFF_T offset,
 774                                 size_t n)
 775 {
 776         struct rw_data s_data;
 777         s_data.len = SMB_VFS_NEXT_RECVFILE(handle,
 778                         fromfd, tofsp, offset, n);
 779         s_data.filename = tofsp->fsp_name->base_name;
 780         DEBUG(10, ("smb_traffic_analyzer_recvfile: recvfile(w): %s\n",
 781                 fsp_str_dbg(tofsp)));
 782         smb_traffic_analyzer_send_data(handle,
 783                 &s_data,
 784                 vfs_id_write);
 785         return s_data.len;
 786 }
 787
 788
 789 static ssize_t smb_traffic_analyzer_read(vfs_handle_struct *handle, \
 790                                 files_struct *fsp, void *data, size_t n)
 791 {
 792         struct rw_data s_data;
 793
 794         s_data.len = SMB_VFS_NEXT_READ(handle, fsp, data, n);
 795         s_data.filename = fsp->fsp_name->base_name;
 796         DEBUG(10, ("smb_traffic_analyzer_read: READ: %s\n", fsp_str_dbg(fsp)));
 797
 798         smb_traffic_analyzer_send_data(handle,
 799                         &s_data,
 800                         vfs_id_read);
 801         return s_data.len;
 802 }
 803
 804
 805 static ssize_t smb_traffic_analyzer_pread(vfs_handle_struct *handle, \
 806                 files_struct *fsp, void *data, size_t n, SMB_OFF_T offset)
 807 {
 808         struct rw_data s_data;
 809
 810         s_data.len = SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
 811         s_data.filename = fsp->fsp_name->base_name;
 812         DEBUG(10, ("smb_traffic_analyzer_pread: PREAD: %s\n",
 813                    fsp_str_dbg(fsp)));
 814
 815         smb_traffic_analyzer_send_data(handle,
 816                         &s_data,
 817                         vfs_id_pread);
 818
 819         return s_data.len;
 820 }
 821
 822 static ssize_t smb_traffic_analyzer_write(vfs_handle_struct *handle, \
 823                         files_struct *fsp, const void *data, size_t n)
 824 {
 825         struct rw_data s_data;
 826
 827         s_data.len = SMB_VFS_NEXT_WRITE(handle, fsp, data, n);
 828         s_data.filename = fsp->fsp_name->base_name;
 829         DEBUG(10, ("smb_traffic_analyzer_write: WRITE: %s\n",
 830                    fsp_str_dbg(fsp)));
 831
 832         smb_traffic_analyzer_send_data(handle,
 833                         &s_data,
 834                         vfs_id_write);
 835         return s_data.len;
 836 }
 837
 838 static ssize_t smb_traffic_analyzer_pwrite(vfs_handle_struct *handle, \
 839              files_struct *fsp, const void *data, size_t n, SMB_OFF_T offset)
 840 {
 841         struct rw_data s_data;
 842
 843         s_data.len = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
 844         s_data.filename = fsp->fsp_name->base_name;
 845         DEBUG(10, ("smb_traffic_analyzer_pwrite: PWRITE: %s\n", \
 846                 fsp_str_dbg(fsp)));
 847
 848         smb_traffic_analyzer_send_data(handle,
 849                         &s_data,
 850                         vfs_id_pwrite);
 851         return s_data.len;
 852 }
 853
 854 static int smb_traffic_analyzer_open(vfs_handle_struct *handle, \
 855         struct smb_filename *smb_fname, files_struct *fsp,\
 856         int flags, mode_t mode)
 857 {
 858         struct open_data s_data;
 859
 860         s_data.result = SMB_VFS_NEXT_OPEN( handle, smb_fname, fsp,
 861                         flags, mode);
 862         DEBUG(10,("smb_traffic_analyzer_open: OPEN: %s\n",
 863                 fsp_str_dbg(fsp)));
 864         s_data.filename = fsp->fsp_name->base_name;
 865         s_data.mode = mode;
 866         smb_traffic_analyzer_send_data(handle,
 867                         &s_data,
 868                         vfs_id_open);
 869         return s_data.result;
 870 }
 871
 872 static int smb_traffic_analyzer_close(vfs_handle_struct *handle, \
 873         files_struct *fsp)
 874 {
 875         struct close_data s_data;
 876         s_data.result = SMB_VFS_NEXT_CLOSE(handle, fsp);
 877         DEBUG(10,("smb_traffic_analyzer_close: CLOSE: %s\n",
 878                 fsp_str_dbg(fsp)));
 879         s_data.filename = fsp->fsp_name->base_name;
 880         smb_traffic_analyzer_send_data(handle,
 881                         &s_data,
 882                         vfs_id_close);
 883         return s_data.result;
 884 }
 885
 886
 887 static struct vfs_fn_pointers vfs_smb_traffic_analyzer_fns = {
 888         .connect_fn = smb_traffic_analyzer_connect,
 889         .vfs_read = smb_traffic_analyzer_read,
 890         .pread = smb_traffic_analyzer_pread,
 891         .write = smb_traffic_analyzer_write,
 892         .pwrite = smb_traffic_analyzer_pwrite,
 893         .mkdir = smb_traffic_analyzer_mkdir,
 894         .rename = smb_traffic_analyzer_rename,
 895         .chdir = smb_traffic_analyzer_chdir,
 896         .open_fn = smb_traffic_analyzer_open,
 897         .rmdir = smb_traffic_analyzer_rmdir,
 898         .close_fn = smb_traffic_analyzer_close,
 899         .sendfile = smb_traffic_analyzer_sendfile,
 900         .recvfile = smb_traffic_analyzer_recvfile
 901 };
 902
 903 /* Module initialization */
 904 NTSTATUS vfs_smb_traffic_analyzer_init(void)
 905 {
 906         NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
 907                                         "smb_traffic_analyzer",
 908                                         &vfs_smb_traffic_analyzer_fns);
 909
 910         if (!NT_STATUS_IS_OK(ret)) {
 911                 return ret;
 912         }
 913
 914         vfs_smb_traffic_analyzer_debug_level =
 915                 debug_add_class("smb_traffic_analyzer");
 916
 917         if (vfs_smb_traffic_analyzer_debug_level == -1) {
 918                 vfs_smb_traffic_analyzer_debug_level = DBGC_VFS;
 919                 DEBUG(1, ("smb_traffic_analyzer_init: Couldn't register custom"
 920                          "debugging class!\n"));
 921         } else {
 922                 DEBUG(3, ("smb_traffic_analyzer_init: Debug class number of"
 923                         "'smb_traffic_analyzer': %d\n", \
 924                         vfs_smb_traffic_analyzer_debug_level));
 925         }
 926
 927         return ret;
 928 }