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  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "includes.h"
  22
  23 /* abstraction for the send_over_network function */
  24 #define UNIX_DOMAIN_SOCKET 1
  25 #define INTERNET_SOCKET 0
  26
  27
  28 /* Prototypes */
  29
  30 static int vfs_smb_traffic_analyzer_debug_level = DBGC_VFS;
  31
  32 /* create the timestamp in sqlite compatible format */
  33 static void get_timestamp(fstring str)
  34 {
  35         struct timeval tv;
  36         struct timezone tz;
  37         struct tm *tm;
  38         int seconds;
  39
  40         gettimeofday(&tv, &tz);
  41         tm=localtime(&tv.tv_sec);
  42         seconds=(float) (tv.tv_usec / 1000);
  43
  44         fstr_sprintf(str,"%04d-%02d-%02d %02d:%02d:%02d.%03d", \
  45                         tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday, \
  46                         tm->tm_hour, tm->tm_min, tm->tm_sec, (int)seconds);
  47
  48 }
  49
  50 static int smb_traffic_analyzer_connMode(vfs_handle_struct *handle)
  51 {
  52         connection_struct *conn = handle->conn;
  53         const char *Mode;
  54         Mode=lp_parm_const_string(SNUM(conn), "smb_traffic_analyzer","mode", \
  55                         "internet_socket");
  56         if (strstr(Mode,"unix_domain_socket")) {
  57                 return UNIX_DOMAIN_SOCKET;
  58         } else {
  59                 return INTERNET_SOCKET;
  60         }
  61
  62 }
  63
  64 /* Connect to an internet socket */
  65
  66 static int smb_traffic_analyzer_connect_inet_socket(vfs_handle_struct *handle)
  67 {
  68         /* Create a streaming Socket */
  69         const char *Hostname;
  70         int sockfd = -1;
  71         uint16_t port;
  72         struct addrinfo hints;
  73         struct addrinfo *ailist = NULL;
  74         struct addrinfo *res = NULL;
  75         connection_struct *conn = handle->conn;
  76         int ret;
  77
  78         /* get port number, target system from the config parameters */
  79         Hostname=lp_parm_const_string(SNUM(conn), "smb_traffic_analyzer",
  80                                 "host", "localhost");
  81
  82         ZERO_STRUCT(hints);
  83         /* By default make sure it supports TCP. */
  84         hints.ai_socktype = SOCK_STREAM;
  85         hints.ai_flags = AI_ADDRCONFIG;
  86
  87         ret = getaddrinfo(Hostname,
  88                         NULL,
  89                         &hints,
  90                         &ailist);
  91
  92         if (ret) {
  93                 DEBUG(3,("smb_traffic_analyzer_connect_inet_socket: "
  94                         "getaddrinfo failed for name %s [%s]\n",
  95                         Hostname,
  96                         gai_strerror(ret) ));
  97                 return -1;
  98         }
  99
 100         port = atoi( lp_parm_const_string(SNUM(conn),
 101                                 "smb_traffic_analyzer", "port", "9430"));
 102
 103         DEBUG(3,("smb_traffic_analyzer: Internet socket mode. Hostname: %s,"
 104                 "Port: %i\n", Hostname, port));
 105
 106         for (res = ailist; res; res = res->ai_next) {
 107                 struct sockaddr_storage ss;
 108
 109                 if (!res->ai_addr || res->ai_addrlen == 0) {
 110                         continue;
 111                 }
 112
 113                 ZERO_STRUCT(ss);
 114                 memcpy(&ss, res->ai_addr, res->ai_addrlen);
 115
 116                 sockfd = open_socket_out(SOCK_STREAM, &ss, port, 10000);
 117                 if (sockfd != -1) {
 118                         break;
 119                 }
 120         }
 121
 122         if (ailist) {
 123                 freeaddrinfo(ailist);
 124         }
 125
 126         if (sockfd == -1) {
 127                 DEBUG(1, ("smb_traffic_analyzer: unable to create "
 128                         "socket, error is %s",
 129                         strerror(errno)));
 130                 return -1;
 131         }
 132
 133         return sockfd;
 134 }
 135
 136 /* Connect to a unix domain socket */
 137
 138 static int smb_traffic_analyzer_connect_unix_socket(vfs_handle_struct *handle)
 139 {
 140         /* Create the socket to stad */
 141         int len, sock;
 142         struct sockaddr_un remote;
 143
 144         DEBUG(7, ("smb_traffic_analyzer_connect_unix_socket: "
 145                         "Unix domain socket mode. Using "
 146                         "/var/tmp/stadsocket\n"));
 147
 148         if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
 149                 DEBUG(1, ("smb_traffic_analyzer_connect_unix_socket: "
 150                         "Couldn't create socket, "
 151                         "make sure stad is running!\n"));
 152         }
 153         remote.sun_family = AF_UNIX;
 154         strlcpy(remote.sun_path, "/var/tmp/stadsocket",
 155                     sizeof(remote.sun_path));
 156         len=strlen(remote.sun_path) + sizeof(remote.sun_family);
 157         if (connect(sock, (struct sockaddr *)&remote, len) == -1 ) {
 158                 DEBUG(1, ("smb_traffic_analyzer_connect_unix_socket: "
 159                         "Could not connect to "
 160                         "socket, make sure\nstad is running!\n"));
 161                 close(sock);
 162                 return -1;
 163         }
 164         return sock;
 165 }
 166
 167 /* Send data over a socket */
 168
 169 static void smb_traffic_analyzer_send_data(vfs_handle_struct *handle,
 170                                         char *str,
 171                                         const char *file_name,
 172                                         bool Write)
 173 {
 174         int *psockfd = NULL;
 175         char Sender[200];
 176         char TimeStamp[200];
 177
 178         SMB_VFS_HANDLE_GET_DATA(handle, psockfd, int, return);
 179
 180         if (psockfd == NULL || *psockfd == -1) {
 181                 DEBUG(1, ("smb_traffic_analyzer_send_data: socket is "
 182                         "closed\n"));
 183                 return;
 184         }
 185
 186         strlcpy(Sender, str, sizeof(Sender));
 187         strlcat(Sender, ",\"", sizeof(Sender));
 188         strlcat(Sender, handle->conn->server_info->sanitized_username, sizeof(Sender));
 189         strlcat(Sender, "\",\"", sizeof(Sender));
 190         strlcat(Sender, pdb_get_domain(handle->conn->server_info->sam_account), sizeof(Sender));
 191         strlcat(Sender, "\",\"", sizeof(Sender));
 192         if (Write)
 193                 strlcat(Sender, "W", sizeof(Sender));
 194         else
 195                 strlcat(Sender, "R", sizeof(Sender));
 196         strlcat(Sender, "\",\"", sizeof(Sender));
 197         strlcat(Sender, handle->conn->connectpath, sizeof(Sender));
 198         strlcat(Sender, "\",\"", sizeof(Sender) - 1);
 199         strlcat(Sender, file_name, sizeof(Sender) - 1);
 200         strlcat(Sender, "\",\"", sizeof(Sender) - 1);
 201         get_timestamp(TimeStamp);
 202         strlcat(Sender, TimeStamp, sizeof(Sender) - 1);
 203         strlcat(Sender, "\");", sizeof(Sender) - 1);
 204         DEBUG(10, ("smb_traffic_analyzer_send_data_socket: sending %s\n",
 205                         Sender));
 206         if (send(*psockfd, Sender, strlen(Sender), 0) == -1 ) {
 207                 DEBUG(1, ("smb_traffic_analyzer_send_data_socket: "
 208                         "error sending data to socket!\n"));
 209                 return ;
 210         }
 211 }
 212
 213 static void smb_traffic_analyzer_free_data(void **pptr)
 214 {
 215         int *pfd = *(int **)pptr;
 216         if(!pfd) {
 217                 return;
 218         }
 219         if (*pfd != -1) {
 220                 close(*pfd);
 221         }
 222         TALLOC_FREE(pfd);
 223 }
 224
 225 static int smb_traffic_analyzer_connect(struct vfs_handle_struct *handle,
 226                          const char *service,
 227                          const char *user)
 228 {
 229         int *pfd = TALLOC_P(handle, int);
 230
 231         if (!pfd) {
 232                 errno = ENOMEM;
 233                 return -1;
 234         }
 235
 236         if (smb_traffic_analyzer_connMode(handle) == UNIX_DOMAIN_SOCKET) {
 237                 *pfd = smb_traffic_analyzer_connect_unix_socket(handle);
 238         } else {
 239                 *pfd = smb_traffic_analyzer_connect_inet_socket(handle);
 240         }
 241         if (*pfd == -1) {
 242                 return -1;
 243         }
 244
 245         /* Store the private data. */
 246         SMB_VFS_HANDLE_SET_DATA(handle, pfd, smb_traffic_analyzer_free_data,
 247                                 int, return -1);
 248         return SMB_VFS_NEXT_CONNECT(handle, service, user);
 249 }
 250
 251 /* VFS Functions: write, read, pread, pwrite for now */
 252
 253 static ssize_t smb_traffic_analyzer_read(vfs_handle_struct *handle, \
 254                                 files_struct *fsp, void *data, size_t n)
 255 {
 256         ssize_t result;
 257         fstring Buffer;
 258
 259         result = SMB_VFS_NEXT_READ(handle, fsp, data, n);
 260         DEBUG(10, ("smb_traffic_analyzer_read: READ: %s\n", fsp->fsp_name ));
 261
 262         fstr_sprintf(Buffer, "%u", (uint) result);
 263
 264         smb_traffic_analyzer_send_data(handle,
 265                         Buffer,
 266                         fsp->fsp_name,
 267                         false);
 268         return result;
 269 }
 270
 271
 272 static ssize_t smb_traffic_analyzer_pread(vfs_handle_struct *handle, \
 273                 files_struct *fsp, void *data, size_t n, SMB_OFF_T offset)
 274 {
 275         ssize_t result;
 276         fstring Buffer;
 277
 278         result = SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
 279
 280         DEBUG(10, ("smb_traffic_analyzer_pread: PREAD: %s\n", fsp->fsp_name ));
 281
 282         fstr_sprintf(Buffer,"%u", (uint) result);
 283         smb_traffic_analyzer_send_data(handle,
 284                         Buffer,
 285                         fsp->fsp_name,
 286                         false);
 287
 288         return result;
 289 }
 290
 291 static ssize_t smb_traffic_analyzer_write(vfs_handle_struct *handle, \
 292                         files_struct *fsp, const void *data, size_t n)
 293 {
 294         ssize_t result;
 295         fstring Buffer;
 296
 297         result = SMB_VFS_NEXT_WRITE(handle, fsp, data, n);
 298
 299         DEBUG(10, ("smb_traffic_analyzer_write: WRITE: %s\n", fsp->fsp_name ));
 300
 301         fstr_sprintf(Buffer, "%u", (uint) result);
 302         smb_traffic_analyzer_send_data(handle,
 303                         Buffer,
 304                         fsp->fsp_name,
 305                         true);
 306         return result;
 307 }
 308
 309 static ssize_t smb_traffic_analyzer_pwrite(vfs_handle_struct *handle, \
 310              files_struct *fsp, const void *data, size_t n, SMB_OFF_T offset)
 311 {
 312         ssize_t result;
 313         fstring Buffer;
 314
 315         result = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
 316
 317         DEBUG(10, ("smb_traffic_analyzer_pwrite: PWRITE: %s\n", fsp->fsp_name ));
 318
 319         fstr_sprintf(Buffer, "%u", (uint) result);
 320         smb_traffic_analyzer_send_data(handle,
 321                         Buffer,
 322                         fsp->fsp_name,
 323                         true);
 324         return result;
 325 }
 326
 327 /* VFS operations we use */
 328
 329 static vfs_op_tuple smb_traffic_analyzer_tuples[] = {
 330
 331         {SMB_VFS_OP(smb_traffic_analyzer_connect), SMB_VFS_OP_CONNECT,
 332          SMB_VFS_LAYER_LOGGER},
 333         {SMB_VFS_OP(smb_traffic_analyzer_read), SMB_VFS_OP_READ,
 334          SMB_VFS_LAYER_LOGGER},
 335         {SMB_VFS_OP(smb_traffic_analyzer_pread), SMB_VFS_OP_PREAD,
 336          SMB_VFS_LAYER_LOGGER},
 337         {SMB_VFS_OP(smb_traffic_analyzer_write), SMB_VFS_OP_WRITE,
 338          SMB_VFS_LAYER_LOGGER},
 339         {SMB_VFS_OP(smb_traffic_analyzer_pwrite), SMB_VFS_OP_PWRITE,
 340          SMB_VFS_LAYER_LOGGER},
 341         {SMB_VFS_OP(NULL),SMB_VFS_OP_NOOP,SMB_VFS_LAYER_NOOP}
 342 };
 343
 344 /* Module initialization */
 345
 346 NTSTATUS vfs_smb_traffic_analyzer_init(void)
 347 {
 348         NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, \
 349                 "smb_traffic_analyzer", smb_traffic_analyzer_tuples);
 350
 351         if (!NT_STATUS_IS_OK(ret)) {
 352                 return ret;
 353         }
 354
 355         vfs_smb_traffic_analyzer_debug_level =
 356                 debug_add_class("smb_traffic_analyzer");
 357
 358         if (vfs_smb_traffic_analyzer_debug_level == -1) {
 359                 vfs_smb_traffic_analyzer_debug_level = DBGC_VFS;
 360                 DEBUG(1, ("smb_traffic_analyzer_init: Couldn't register custom"
 361                          "debugging class!\n"));
 362         } else {
 363                 DEBUG(3, ("smb_traffic_analyzer_init: Debug class number of"
 364                         "'smb_traffic_analyzer': %d\n", \
 365                         vfs_smb_traffic_analyzer_debug_level));
 366         }
 367
 368         return ret;
 369 }