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
   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
  24 /* abstraction for the send_over_network function */
  25
  26 enum sock_type {INTERNET_SOCKET = 0, UNIX_DOMAIN_SOCKET};
  27
  28 #define LOCAL_PATHNAME "/var/tmp/stadsocket"
  29
  30 static int vfs_smb_traffic_analyzer_debug_level = DBGC_VFS;
  31
  32 static enum sock_type smb_traffic_analyzer_connMode(vfs_handle_struct *handle)
  33 {
  34         connection_struct *conn = handle->conn;
  35         const char *Mode;
  36         Mode=lp_parm_const_string(SNUM(conn), "smb_traffic_analyzer","mode", \
  37                         "internet_socket");
  38         if (strstr(Mode,"unix_domain_socket")) {
  39                 return UNIX_DOMAIN_SOCKET;
  40         } else {
  41                 return INTERNET_SOCKET;
  42         }
  43 }
  44
  45
  46 /* Connect to an internet socket */
  47
  48 static int smb_traffic_analyzer_connect_inet_socket(vfs_handle_struct *handle,
  49                                         const char *name, uint16_t port)
  50 {
  51         /* Create a streaming Socket */
  52         int sockfd = -1;
  53         struct addrinfo hints;
  54         struct addrinfo *ailist = NULL;
  55         struct addrinfo *res = NULL;
  56         int ret;
  57
  58         ZERO_STRUCT(hints);
  59         /* By default make sure it supports TCP. */
  60         hints.ai_socktype = SOCK_STREAM;
  61         hints.ai_flags = AI_ADDRCONFIG;
  62
  63         ret = getaddrinfo(name,
  64                         NULL,
  65                         &hints,
  66                         &ailist);
  67
  68         if (ret) {
  69                 DEBUG(3,("smb_traffic_analyzer_connect_inet_socket: "
  70                         "getaddrinfo failed for name %s [%s]\n",
  71                         name,
  72                         gai_strerror(ret) ));
  73                 return -1;
  74         }
  75
  76         DEBUG(3,("smb_traffic_analyzer: Internet socket mode. Hostname: %s,"
  77                 "Port: %i\n", name, port));
  78
  79         for (res = ailist; res; res = res->ai_next) {
  80                 struct sockaddr_storage ss;
  81                 NTSTATUS status;
  82
  83                 if (!res->ai_addr || res->ai_addrlen == 0) {
  84                         continue;
  85                 }
  86
  87                 ZERO_STRUCT(ss);
  88                 memcpy(&ss, res->ai_addr, res->ai_addrlen);
  89
  90                 status = open_socket_out(&ss, port, 10000, &sockfd);
  91                 if (NT_STATUS_IS_OK(status)) {
  92                         break;
  93                 }
  94         }
  95
  96         if (ailist) {
  97                 freeaddrinfo(ailist);
  98         }
  99
 100         if (sockfd == -1) {
 101                 DEBUG(1, ("smb_traffic_analyzer: unable to create "
 102                         "socket, error is %s",
 103                         strerror(errno)));
 104                 return -1;
 105         }
 106
 107         return sockfd;
 108 }
 109
 110 /* Connect to a unix domain socket */
 111
 112 static int smb_traffic_analyzer_connect_unix_socket(vfs_handle_struct *handle,
 113                                                 const char *name)
 114 {
 115         /* Create the socket to stad */
 116         int len, sock;
 117         struct sockaddr_un remote;
 118
 119         DEBUG(7, ("smb_traffic_analyzer_connect_unix_socket: "
 120                         "Unix domain socket mode. Using %s\n",
 121                         name ));
 122
 123         if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
 124                 DEBUG(1, ("smb_traffic_analyzer_connect_unix_socket: "
 125                         "Couldn't create socket, "
 126                         "make sure stad is running!\n"));
 127                 return -1;
 128         }
 129         remote.sun_family = AF_UNIX;
 130         strlcpy(remote.sun_path, name,
 131                     sizeof(remote.sun_path));
 132         len=strlen(remote.sun_path) + sizeof(remote.sun_family);
 133         if (connect(sock, (struct sockaddr *)&remote, len) == -1 ) {
 134                 DEBUG(1, ("smb_traffic_analyzer_connect_unix_socket: "
 135                         "Could not connect to "
 136                         "socket, make sure\nstad is running!\n"));
 137                 close(sock);
 138                 return -1;
 139         }
 140         return sock;
 141 }
 142
 143 /* Private data allowing shared connection sockets. */
 144
 145 struct refcounted_sock {
 146         struct refcounted_sock *next, *prev;
 147         char *name;
 148         uint16_t port;
 149         int sock;
 150         unsigned int ref_count;
 151 };
 152
 153 /* Send data over a socket */
 154
 155 static void smb_traffic_analyzer_send_data(vfs_handle_struct *handle,
 156                                         ssize_t result,
 157                                         const char *file_name,
 158                                         bool Write)
 159 {
 160         struct refcounted_sock *rf_sock = NULL;
 161         struct timeval tv;
 162         time_t tv_sec;
 163         struct tm *tm = NULL;
 164         int seconds;
 165         char *str = NULL;
 166         char *username = NULL;
 167         const char *anon_prefix = NULL;
 168         size_t len;
 169
 170         SMB_VFS_HANDLE_GET_DATA(handle, rf_sock, struct refcounted_sock, return);
 171
 172         if (rf_sock == NULL || rf_sock->sock == -1) {
 173                 DEBUG(1, ("smb_traffic_analyzer_send_data: socket is "
 174                         "closed\n"));
 175                 return;
 176         }
 177
 178         GetTimeOfDay(&tv);
 179         tv_sec = convert_timespec_to_time_t(convert_timeval_to_timespec(tv));
 180         tm = localtime(&tv_sec);
 181         if (!tm) {
 182                 return;
 183         }
 184         seconds=(float) (tv.tv_usec / 1000);
 185
 186         /* check if anonymization is required */
 187
 188         anon_prefix=lp_parm_const_string(SNUM(handle->conn),"smb_traffic_analyzer",\
 189                                         "anonymize_prefix", NULL );
 190         if (anon_prefix!=NULL) {
 191                 username = talloc_asprintf(talloc_tos(),
 192                         "%s%i",
 193                         anon_prefix,
 194                         str_checksum(
 195                                 handle->conn->server_info->sanitized_username ) );
 196         } else {
 197                 username = handle->conn->server_info->sanitized_username;
 198         }
 199
 200         if (!username) {
 201                 return;
 202         }
 203
 204         str = talloc_asprintf(talloc_tos(),
 205                         "V1,%u,\"%s\",\"%s\",\"%c\",\"%s\",\"%s\","
 206                         "\"%04d-%02d-%02d %02d:%02d:%02d.%03d\"\n",
 207                         (unsigned int)result,
 208                         username,
 209                         pdb_get_domain(handle->conn->server_info->sam_account),
 210                         Write ? 'W' : 'R',
 211                         handle->conn->connectpath,
 212                         file_name,
 213                         tm->tm_year+1900,
 214                         tm->tm_mon+1,
 215                         tm->tm_mday,
 216                         tm->tm_hour,
 217                         tm->tm_min,
 218                         tm->tm_sec,
 219                         (int)seconds);
 220
 221         if (!str) {
 222                 return;
 223         }
 224
 225         len = strlen(str);
 226
 227         DEBUG(10, ("smb_traffic_analyzer_send_data_socket: sending %s\n",
 228                         str));
 229         if (write_data(rf_sock->sock, str, len) != len) {
 230                 DEBUG(1, ("smb_traffic_analyzer_send_data_socket: "
 231                         "error sending data to socket!\n"));
 232                 return ;
 233         }
 234 }
 235
 236 static struct refcounted_sock *sock_list;
 237
 238 static void smb_traffic_analyzer_free_data(void **pptr)
 239 {
 240         struct refcounted_sock *rf_sock = *(struct refcounted_sock **)pptr;
 241         if (rf_sock == NULL) {
 242                 return;
 243         }
 244         rf_sock->ref_count--;
 245         if (rf_sock->ref_count != 0) {
 246                 return;
 247         }
 248         if (rf_sock->sock != -1) {
 249                 close(rf_sock->sock);
 250         }
 251         DLIST_REMOVE(sock_list, rf_sock);
 252         TALLOC_FREE(rf_sock);
 253 }
 254
 255 static int smb_traffic_analyzer_connect(struct vfs_handle_struct *handle,
 256                          const char *service,
 257                          const char *user)
 258 {
 259         connection_struct *conn = handle->conn;
 260         enum sock_type st = smb_traffic_analyzer_connMode(handle);
 261         struct refcounted_sock *rf_sock = NULL;
 262         const char *name = (st == UNIX_DOMAIN_SOCKET) ? LOCAL_PATHNAME :
 263                                 lp_parm_const_string(SNUM(conn),
 264                                         "smb_traffic_analyzer",
 265                                 "host", "localhost");
 266         uint16_t port = (st == UNIX_DOMAIN_SOCKET) ? 0 :
 267                                 atoi( lp_parm_const_string(SNUM(conn),
 268                                 "smb_traffic_analyzer", "port", "9430"));
 269
 270         /* Are we already connected ? */
 271         for (rf_sock = sock_list; rf_sock; rf_sock = rf_sock->next) {
 272                 if (port == rf_sock->port &&
 273                                 (strcmp(name, rf_sock->name) == 0)) {
 274                         break;
 275                 }
 276         }
 277
 278         /* If we're connected already, just increase the
 279          * reference count. */
 280         if (rf_sock) {
 281                 rf_sock->ref_count++;
 282         } else {
 283                 /* New connection. */
 284                 rf_sock = TALLOC_ZERO_P(NULL, struct refcounted_sock);
 285                 if (rf_sock == NULL) {
 286                         errno = ENOMEM;
 287                         return -1;
 288                 }
 289                 rf_sock->name = talloc_strdup(rf_sock, name);
 290                 if (rf_sock->name == NULL) {
 291                         TALLOC_FREE(rf_sock);
 292                         errno = ENOMEM;
 293                         return -1;
 294                 }
 295                 rf_sock->port = port;
 296                 rf_sock->ref_count = 1;
 297
 298                 if (st == UNIX_DOMAIN_SOCKET) {
 299                         rf_sock->sock = smb_traffic_analyzer_connect_unix_socket(handle,
 300                                                         name);
 301                 } else {
 302
 303                         rf_sock->sock = smb_traffic_analyzer_connect_inet_socket(handle,
 304                                                         name,
 305                                                         port);
 306                 }
 307                 if (rf_sock->sock == -1) {
 308                         TALLOC_FREE(rf_sock);
 309                         return -1;
 310                 }
 311                 DLIST_ADD(sock_list, rf_sock);
 312         }
 313
 314         /* Store the private data. */
 315         SMB_VFS_HANDLE_SET_DATA(handle, rf_sock, smb_traffic_analyzer_free_data,
 316                                 struct refcounted_sock, return -1);
 317         return SMB_VFS_NEXT_CONNECT(handle, service, user);
 318 }
 319
 320 /* VFS Functions: write, read, pread, pwrite for now */
 321
 322 static ssize_t smb_traffic_analyzer_read(vfs_handle_struct *handle, \
 323                                 files_struct *fsp, void *data, size_t n)
 324 {
 325         ssize_t result;
 326
 327         result = SMB_VFS_NEXT_READ(handle, fsp, data, n);
 328         DEBUG(10, ("smb_traffic_analyzer_read: READ: %s\n", fsp->fsp_name ));
 329
 330         smb_traffic_analyzer_send_data(handle,
 331                         result,
 332                         fsp->fsp_name,
 333                         false);
 334         return result;
 335 }
 336
 337
 338 static ssize_t smb_traffic_analyzer_pread(vfs_handle_struct *handle, \
 339                 files_struct *fsp, void *data, size_t n, SMB_OFF_T offset)
 340 {
 341         ssize_t result;
 342
 343         result = SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
 344
 345         DEBUG(10, ("smb_traffic_analyzer_pread: PREAD: %s\n", fsp->fsp_name ));
 346
 347         smb_traffic_analyzer_send_data(handle,
 348                         result,
 349                         fsp->fsp_name,
 350                         false);
 351
 352         return result;
 353 }
 354
 355 static ssize_t smb_traffic_analyzer_write(vfs_handle_struct *handle, \
 356                         files_struct *fsp, const void *data, size_t n)
 357 {
 358         ssize_t result;
 359
 360         result = SMB_VFS_NEXT_WRITE(handle, fsp, data, n);
 361
 362         DEBUG(10, ("smb_traffic_analyzer_write: WRITE: %s\n", fsp->fsp_name ));
 363
 364         smb_traffic_analyzer_send_data(handle,
 365                         result,
 366                         fsp->fsp_name,
 367                         true);
 368         return result;
 369 }
 370
 371 static ssize_t smb_traffic_analyzer_pwrite(vfs_handle_struct *handle, \
 372              files_struct *fsp, const void *data, size_t n, SMB_OFF_T offset)
 373 {
 374         ssize_t result;
 375
 376         result = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
 377
 378         DEBUG(10, ("smb_traffic_analyzer_pwrite: PWRITE: %s\n", fsp->fsp_name ));
 379
 380         smb_traffic_analyzer_send_data(handle,
 381                         result,
 382                         fsp->fsp_name,
 383                         true);
 384         return result;
 385 }
 386
 387 /* VFS operations we use */
 388
 389 static vfs_op_tuple smb_traffic_analyzer_tuples[] = {
 390
 391         {SMB_VFS_OP(smb_traffic_analyzer_connect), SMB_VFS_OP_CONNECT,
 392          SMB_VFS_LAYER_LOGGER},
 393         {SMB_VFS_OP(smb_traffic_analyzer_read), SMB_VFS_OP_READ,
 394          SMB_VFS_LAYER_LOGGER},
 395         {SMB_VFS_OP(smb_traffic_analyzer_pread), SMB_VFS_OP_PREAD,
 396          SMB_VFS_LAYER_LOGGER},
 397         {SMB_VFS_OP(smb_traffic_analyzer_write), SMB_VFS_OP_WRITE,
 398          SMB_VFS_LAYER_LOGGER},
 399         {SMB_VFS_OP(smb_traffic_analyzer_pwrite), SMB_VFS_OP_PWRITE,
 400          SMB_VFS_LAYER_LOGGER},
 401         {SMB_VFS_OP(NULL),SMB_VFS_OP_NOOP,SMB_VFS_LAYER_NOOP}
 402 };
 403
 404 /* Module initialization */
 405
 406 NTSTATUS vfs_smb_traffic_analyzer_init(void)
 407 {
 408         NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, \
 409                 "smb_traffic_analyzer", smb_traffic_analyzer_tuples);
 410
 411         if (!NT_STATUS_IS_OK(ret)) {
 412                 return ret;
 413         }
 414
 415         vfs_smb_traffic_analyzer_debug_level =
 416                 debug_add_class("smb_traffic_analyzer");
 417
 418         if (vfs_smb_traffic_analyzer_debug_level == -1) {
 419                 vfs_smb_traffic_analyzer_debug_level = DBGC_VFS;
 420                 DEBUG(1, ("smb_traffic_analyzer_init: Couldn't register custom"
 421                          "debugging class!\n"));
 422         } else {
 423                 DEBUG(3, ("smb_traffic_analyzer_init: Debug class number of"
 424                         "'smb_traffic_analyzer': %d\n", \
 425                         vfs_smb_traffic_analyzer_debug_level));
 426         }
 427
 428         return ret;
 429 }