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         const char *total_anonymization = NULL;
 169         size_t len;
 170
 171         SMB_VFS_HANDLE_GET_DATA(handle, rf_sock, struct refcounted_sock, return);
 172
 173         if (rf_sock == NULL || rf_sock->sock == -1) {
 174                 DEBUG(1, ("smb_traffic_analyzer_send_data: socket is "
 175                         "closed\n"));
 176                 return;
 177         }
 178
 179         GetTimeOfDay(&tv);
 180         tv_sec = convert_timespec_to_time_t(convert_timeval_to_timespec(tv));
 181         tm = localtime(&tv_sec);
 182         if (!tm) {
 183                 return;
 184         }
 185         seconds=(float) (tv.tv_usec / 1000);
 186
 187         /* check if anonymization is required */
 188
 189         total_anonymization=lp_parm_const_string(SNUM(handle->conn),"smb_traffic_analyzer",
 190                                         "total_anonymization", NULL);
 191
 192         anon_prefix=lp_parm_const_string(SNUM(handle->conn),"smb_traffic_analyzer",\
 193                                         "anonymize_prefix", NULL );
 194         if (anon_prefix!=NULL) {
 195                 if (total_anonymization!=NULL) {
 196                         username = talloc_asprintf(talloc_tos(),
 197                                 "%s",
 198                                 anon_prefix);
 199                 } else {
 200                         username = talloc_asprintf(talloc_tos(),
 201                                 "%s%i",
 202                                 anon_prefix,
 203                                 str_checksum(
 204                                         handle->conn->server_info->sanitized_username ) );
 205                 }
 206
 207         } else {
 208                 username = handle->conn->server_info->sanitized_username;
 209         }
 210
 211         if (!username) {
 212                 return;
 213         }
 214
 215         str = talloc_asprintf(talloc_tos(),
 216                         "V1,%u,\"%s\",\"%s\",\"%c\",\"%s\",\"%s\","
 217                         "\"%04d-%02d-%02d %02d:%02d:%02d.%03d\"\n",
 218                         (unsigned int)result,
 219                         username,
 220                         pdb_get_domain(handle->conn->server_info->sam_account),
 221                         Write ? 'W' : 'R',
 222                         handle->conn->connectpath,
 223                         file_name,
 224                         tm->tm_year+1900,
 225                         tm->tm_mon+1,
 226                         tm->tm_mday,
 227                         tm->tm_hour,
 228                         tm->tm_min,
 229                         tm->tm_sec,
 230                         (int)seconds);
 231
 232         if (!str) {
 233                 return;
 234         }
 235
 236         len = strlen(str);
 237
 238         DEBUG(10, ("smb_traffic_analyzer_send_data_socket: sending %s\n",
 239                         str));
 240         if (write_data(rf_sock->sock, str, len) != len) {
 241                 DEBUG(1, ("smb_traffic_analyzer_send_data_socket: "
 242                         "error sending data to socket!\n"));
 243                 return ;
 244         }
 245 }
 246
 247 static struct refcounted_sock *sock_list;
 248
 249 static void smb_traffic_analyzer_free_data(void **pptr)
 250 {
 251         struct refcounted_sock *rf_sock = *(struct refcounted_sock **)pptr;
 252         if (rf_sock == NULL) {
 253                 return;
 254         }
 255         rf_sock->ref_count--;
 256         if (rf_sock->ref_count != 0) {
 257                 return;
 258         }
 259         if (rf_sock->sock != -1) {
 260                 close(rf_sock->sock);
 261         }
 262         DLIST_REMOVE(sock_list, rf_sock);
 263         TALLOC_FREE(rf_sock);
 264 }
 265
 266 static int smb_traffic_analyzer_connect(struct vfs_handle_struct *handle,
 267                          const char *service,
 268                          const char *user)
 269 {
 270         connection_struct *conn = handle->conn;
 271         enum sock_type st = smb_traffic_analyzer_connMode(handle);
 272         struct refcounted_sock *rf_sock = NULL;
 273         const char *name = (st == UNIX_DOMAIN_SOCKET) ? LOCAL_PATHNAME :
 274                                 lp_parm_const_string(SNUM(conn),
 275                                         "smb_traffic_analyzer",
 276                                 "host", "localhost");
 277         uint16_t port = (st == UNIX_DOMAIN_SOCKET) ? 0 :
 278                                 atoi( lp_parm_const_string(SNUM(conn),
 279                                 "smb_traffic_analyzer", "port", "9430"));
 280         int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
 281
 282         if (ret < 0) {
 283                 return ret;
 284         }
 285
 286         /* Are we already connected ? */
 287         for (rf_sock = sock_list; rf_sock; rf_sock = rf_sock->next) {
 288                 if (port == rf_sock->port &&
 289                                 (strcmp(name, rf_sock->name) == 0)) {
 290                         break;
 291                 }
 292         }
 293
 294         /* If we're connected already, just increase the
 295          * reference count. */
 296         if (rf_sock) {
 297                 rf_sock->ref_count++;
 298         } else {
 299                 /* New connection. */
 300                 rf_sock = TALLOC_ZERO_P(NULL, struct refcounted_sock);
 301                 if (rf_sock == NULL) {
 302                         SMB_VFS_NEXT_DISCONNECT(handle);
 303                         errno = ENOMEM;
 304                         return -1;
 305                 }
 306                 rf_sock->name = talloc_strdup(rf_sock, name);
 307                 if (rf_sock->name == NULL) {
 308                         SMB_VFS_NEXT_DISCONNECT(handle);
 309                         TALLOC_FREE(rf_sock);
 310                         errno = ENOMEM;
 311                         return -1;
 312                 }
 313                 rf_sock->port = port;
 314                 rf_sock->ref_count = 1;
 315
 316                 if (st == UNIX_DOMAIN_SOCKET) {
 317                         rf_sock->sock = smb_traffic_analyzer_connect_unix_socket(handle,
 318                                                         name);
 319                 } else {
 320
 321                         rf_sock->sock = smb_traffic_analyzer_connect_inet_socket(handle,
 322                                                         name,
 323                                                         port);
 324                 }
 325                 if (rf_sock->sock == -1) {
 326                         SMB_VFS_NEXT_DISCONNECT(handle);
 327                         TALLOC_FREE(rf_sock);
 328                         return -1;
 329                 }
 330                 DLIST_ADD(sock_list, rf_sock);
 331         }
 332
 333         /* Store the private data. */
 334         SMB_VFS_HANDLE_SET_DATA(handle, rf_sock, smb_traffic_analyzer_free_data,
 335                                 struct refcounted_sock, return -1);
 336         return 0;
 337 }
 338
 339 /* VFS Functions: write, read, pread, pwrite for now */
 340
 341 static ssize_t smb_traffic_analyzer_read(vfs_handle_struct *handle, \
 342                                 files_struct *fsp, void *data, size_t n)
 343 {
 344         ssize_t result;
 345
 346         result = SMB_VFS_NEXT_READ(handle, fsp, data, n);
 347         DEBUG(10, ("smb_traffic_analyzer_read: READ: %s\n", fsp_str_dbg(fsp)));
 348
 349         smb_traffic_analyzer_send_data(handle,
 350                         result,
 351                         fsp->fsp_name->base_name,
 352                         false);
 353         return result;
 354 }
 355
 356
 357 static ssize_t smb_traffic_analyzer_pread(vfs_handle_struct *handle, \
 358                 files_struct *fsp, void *data, size_t n, SMB_OFF_T offset)
 359 {
 360         ssize_t result;
 361
 362         result = SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
 363
 364         DEBUG(10, ("smb_traffic_analyzer_pread: PREAD: %s\n",
 365                    fsp_str_dbg(fsp)));
 366
 367         smb_traffic_analyzer_send_data(handle,
 368                         result,
 369                         fsp->fsp_name->base_name,
 370                         false);
 371
 372         return result;
 373 }
 374
 375 static ssize_t smb_traffic_analyzer_write(vfs_handle_struct *handle, \
 376                         files_struct *fsp, const void *data, size_t n)
 377 {
 378         ssize_t result;
 379
 380         result = SMB_VFS_NEXT_WRITE(handle, fsp, data, n);
 381
 382         DEBUG(10, ("smb_traffic_analyzer_write: WRITE: %s\n",
 383                    fsp_str_dbg(fsp)));
 384
 385         smb_traffic_analyzer_send_data(handle,
 386                         result,
 387                         fsp->fsp_name->base_name,
 388                         true);
 389         return result;
 390 }
 391
 392 static ssize_t smb_traffic_analyzer_pwrite(vfs_handle_struct *handle, \
 393              files_struct *fsp, const void *data, size_t n, SMB_OFF_T offset)
 394 {
 395         ssize_t result;
 396
 397         result = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
 398
 399         DEBUG(10, ("smb_traffic_analyzer_pwrite: PWRITE: %s\n", fsp_str_dbg(fsp)));
 400
 401         smb_traffic_analyzer_send_data(handle,
 402                         result,
 403                         fsp->fsp_name->base_name,
 404                         true);
 405         return result;
 406 }
 407
 408 static struct vfs_fn_pointers vfs_smb_traffic_analyzer_fns = {
 409         .connect_fn = smb_traffic_analyzer_connect,
 410         .vfs_read = smb_traffic_analyzer_read,
 411         .pread = smb_traffic_analyzer_pread,
 412         .write = smb_traffic_analyzer_write,
 413         .pwrite = smb_traffic_analyzer_pwrite,
 414 };
 415
 416 /* Module initialization */
 417
 418 NTSTATUS vfs_smb_traffic_analyzer_init(void)
 419 {
 420         NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
 421                                         "smb_traffic_analyzer",
 422                                         &vfs_smb_traffic_analyzer_fns);
 423
 424         if (!NT_STATUS_IS_OK(ret)) {
 425                 return ret;
 426         }
 427
 428         vfs_smb_traffic_analyzer_debug_level =
 429                 debug_add_class("smb_traffic_analyzer");
 430
 431         if (vfs_smb_traffic_analyzer_debug_level == -1) {
 432                 vfs_smb_traffic_analyzer_debug_level = DBGC_VFS;
 433                 DEBUG(1, ("smb_traffic_analyzer_init: Couldn't register custom"
 434                          "debugging class!\n"));
 435         } else {
 436                 DEBUG(3, ("smb_traffic_analyzer_init: Debug class number of"
 437                         "'smb_traffic_analyzer': %d\n", \
 438                         vfs_smb_traffic_analyzer_debug_level));
 439         }
 440
 441         return ret;
 442 }