source/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 extern userdom_struct current_user_info;
  31
  32 static int vfs_smb_traffic_analyzer_debug_level = DBGC_VFS;
  33
  34 /* create the timestamp in sqlite compatible format */
  35 static void get_timestamp(fstring str)
  36 {
  37         struct timeval tv;
  38         struct timezone tz;
  39         struct tm *tm;
  40         int seconds;
  41
  42         gettimeofday(&tv, &tz);
  43         tm=localtime(&tv.tv_sec);
  44         seconds=(float) (tv.tv_usec / 1000);
  45
  46         fstr_sprintf(str,"%04d-%02d-%02d %02d:%02d:%02d.%03d", \
  47                         tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday, \
  48                         tm->tm_hour, tm->tm_min, tm->tm_sec, (int)seconds);
  49
  50 }
  51
  52 static int smb_traffic_analyzer_connMode(vfs_handle_struct *handle)
  53 {
  54         connection_struct *conn = handle->conn;
  55         const char *Mode;
  56         Mode=lp_parm_const_string(SNUM(conn), "smb_traffic_analyzer","mode", \
  57                         "internet_socket");
  58         if (strstr(Mode,"unix_domain_socket")) {
  59                 return UNIX_DOMAIN_SOCKET;
  60         } else {
  61                 return INTERNET_SOCKET;
  62         }
  63
  64 }
  65
  66 /* Connect to an internet socket */
  67
  68 static int smb_traffic_analyzer_connect_inet_socket(vfs_handle_struct *handle)
  69 {
  70         /* Create a streaming Socket */
  71         const char *Hostname;
  72         int sockfd = -1;
  73         uint16_t port;
  74         struct addrinfo hints;
  75         struct addrinfo *ailist = NULL;
  76         struct addrinfo *res = NULL;
  77         connection_struct *conn = handle->conn;
  78         int ret;
  79
  80         /* get port number, target system from the config parameters */
  81         Hostname=lp_parm_const_string(SNUM(conn), "smb_traffic_analyzer",
  82                                 "host", "localhost");
  83
  84         ZERO_STRUCT(hints);
  85         /* By default make sure it supports TCP. */
  86         hints.ai_socktype = SOCK_STREAM;
  87         hints.ai_flags = AI_ADDRCONFIG;
  88
  89         ret = getaddrinfo(Hostname,
  90                         NULL,
  91                         &hints,
  92                         &ailist);
  93
  94         if (ret) {
  95                 DEBUG(3,("smb_traffic_analyzer_connect_inet_socket: "
  96                         "getaddrinfo failed for name %s [%s]\n",
  97                         Hostname,
  98                         gai_strerror(ret) ));
  99                 return -1;
 100         }
 101
 102         port = atoi( lp_parm_const_string(SNUM(conn),
 103                                 "smb_traffic_analyzer", "port", "9430"));
 104
 105         DEBUG(3,("smb_traffic_analyzer: Internet socket mode. Hostname: %s,"
 106                 "Port: %i\n", Hostname, port));
 107
 108         for (res = ailist; res; res = res->ai_next) {
 109                 struct sockaddr_storage ss;
 110
 111                 if (!res->ai_addr || res->ai_addrlen == 0) {
 112                         continue;
 113                 }
 114
 115                 ZERO_STRUCT(ss);
 116                 memcpy(&ss, res->ai_addr, res->ai_addrlen);
 117
 118                 sockfd = open_socket_out(SOCK_STREAM, &ss, port, 10000);
 119                 if (sockfd != -1) {
 120                         break;
 121                 }
 122         }
 123
 124         if (ailist) {
 125                 freeaddrinfo(ailist);
 126         }
 127
 128         if (sockfd == -1) {
 129                 DEBUG(1, ("smb_traffic_analyzer: unable to create "
 130                         "socket, error is %s",
 131                         strerror(errno)));
 132                 return -1;
 133         }
 134
 135         return sockfd;
 136 }
 137
 138 /* Connect to a unix domain socket */
 139
 140 static int smb_traffic_analyzer_connect_unix_socket(vfs_handle_struct *handle)
 141 {
 142         /* Create the socket to stad */
 143         int len, sock;
 144         struct sockaddr_un remote;
 145
 146         DEBUG(7, ("smb_traffic_analyzer_connect_unix_socket: "
 147                         "Unix domain socket mode. Using "
 148                         "/var/tmp/stadsocket\n"));
 149
 150         if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
 151                 DEBUG(1, ("smb_traffic_analyzer_connect_unix_socket: "
 152                         "Couldn't create socket, "
 153                         "make sure stad is running!\n"));
 154         }
 155         remote.sun_family = AF_UNIX;
 156         strlcpy(remote.sun_path, "/var/tmp/stadsocket",
 157                     sizeof(remote.sun_path));
 158         len=strlen(remote.sun_path) + sizeof(remote.sun_family);
 159         if (connect(sock, (struct sockaddr *)&remote, len) == -1 ) {
 160                 DEBUG(1, ("smb_traffic_analyzer_connect_unix_socket: "
 161                         "Could not connect to "
 162                         "socket, make sure\nstad is running!\n"));
 163                 close(sock);
 164                 return -1;
 165         }
 166         return sock;
 167 }
 168
 169 /* Send data over a socket */
 170
 171 static void smb_traffic_analyzer_send_data(vfs_handle_struct *handle,
 172                                         char *str,
 173                                         const char *file_name,
 174                                         bool Write)
 175 {
 176         int *psockfd = NULL;
 177         char Sender[200];
 178         char TimeStamp[200];
 179
 180         SMB_VFS_HANDLE_GET_DATA(handle, psockfd, int, return);
 181
 182         if (psockfd == NULL || *psockfd == -1) {
 183                 DEBUG(1, ("smb_traffic_analyzer_send_data: socket is "
 184                         "closed\n"));
 185                 return;
 186         }
 187
 188         strlcpy(Sender, str, sizeof(Sender));
 189         strlcat(Sender, ",\"", sizeof(Sender));
 190         strlcat(Sender, get_current_username(), sizeof(Sender));
 191         strlcat(Sender, "\",\"", sizeof(Sender));
 192         strlcat(Sender, current_user_info.domain, sizeof(Sender));
 193         strlcat(Sender, "\",\"", sizeof(Sender));
 194         if (Write)
 195                 strlcat(Sender, "W", sizeof(Sender));
 196         else
 197                 strlcat(Sender, "R", sizeof(Sender));
 198         strlcat(Sender, "\",\"", sizeof(Sender));
 199         strlcat(Sender, handle->conn->connectpath, sizeof(Sender));
 200         strlcat(Sender, "\",\"", sizeof(Sender) - 1);
 201         strlcat(Sender, file_name, sizeof(Sender) - 1);
 202         strlcat(Sender, "\",\"", sizeof(Sender) - 1);
 203         get_timestamp(TimeStamp);
 204         strlcat(Sender, TimeStamp, sizeof(Sender) - 1);
 205         strlcat(Sender, "\");", sizeof(Sender) - 1);
 206         DEBUG(10, ("smb_traffic_analyzer_send_data_socket: sending %s\n",
 207                         Sender));
 208         if (send(*psockfd, Sender, strlen(Sender), 0) == -1 ) {
 209                 DEBUG(1, ("smb_traffic_analyzer_send_data_socket: "
 210                         "error sending data to socket!\n"));
 211                 return ;
 212         }
 213 }
 214
 215 static void smb_traffic_analyzer_free_data(void **pptr)
 216 {
 217         int *pfd = *(int **)pptr;
 218         if(!pfd) {
 219                 return;
 220         }
 221         if (*pfd != -1) {
 222                 close(*pfd);
 223         }
 224         TALLOC_FREE(pfd);
 225 }
 226
 227 static int smb_traffic_analyzer_connect(struct vfs_handle_struct *handle,
 228                          const char *service,
 229                          const char *user)
 230 {
 231         int *pfd = TALLOC_P(handle, int);
 232
 233         if (!pfd) {
 234                 errno = ENOMEM;
 235                 return -1;
 236         }
 237
 238         if (smb_traffic_analyzer_connMode(handle) == UNIX_DOMAIN_SOCKET) {
 239                 *pfd = smb_traffic_analyzer_connect_unix_socket(handle);
 240         } else {
 241                 *pfd = smb_traffic_analyzer_connect_inet_socket(handle);
 242         }
 243         if (*pfd == -1) {
 244                 return -1;
 245         }
 246
 247         /* Store the private data. */
 248         SMB_VFS_HANDLE_SET_DATA(handle, pfd, smb_traffic_analyzer_free_data,
 249                                 int, return -1);
 250         return SMB_VFS_NEXT_CONNECT(handle, service, user);
 251 }
 252
 253 /* VFS Functions: write, read, pread, pwrite for now */
 254
 255 static ssize_t smb_traffic_analyzer_read(vfs_handle_struct *handle, \
 256                                 files_struct *fsp, void *data, size_t n)
 257 {
 258         ssize_t result;
 259         fstring Buffer;
 260
 261         result = SMB_VFS_NEXT_READ(handle, fsp, data, n);
 262         DEBUG(10, ("smb_traffic_analyzer_read: READ: %s\n", fsp->fsp_name ));
 263
 264         fstr_sprintf(Buffer, "%u", (uint) result);
 265
 266         smb_traffic_analyzer_send_data(handle,
 267                         Buffer,
 268                         fsp->fsp_name,
 269                         false);
 270         return result;
 271 }
 272
 273
 274 static ssize_t smb_traffic_analyzer_pread(vfs_handle_struct *handle, \
 275                 files_struct *fsp, void *data, size_t n, SMB_OFF_T offset)
 276 {
 277         ssize_t result;
 278         fstring Buffer;
 279
 280         result = SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
 281
 282         DEBUG(10, ("smb_traffic_analyzer_pread: PREAD: %s\n", fsp->fsp_name ));
 283
 284         fstr_sprintf(Buffer,"%u", (uint) result);
 285         smb_traffic_analyzer_send_data(handle,
 286                         Buffer,
 287                         fsp->fsp_name,
 288                         false);
 289
 290         return result;
 291 }
 292
 293 static ssize_t smb_traffic_analyzer_write(vfs_handle_struct *handle, \
 294                         files_struct *fsp, const void *data, size_t n)
 295 {
 296         ssize_t result;
 297         fstring Buffer;
 298
 299         result = SMB_VFS_NEXT_WRITE(handle, fsp, data, n);
 300
 301         DEBUG(10, ("smb_traffic_analyzer_write: WRITE: %s\n", fsp->fsp_name ));
 302
 303         fstr_sprintf(Buffer, "%u", (uint) result);
 304         smb_traffic_analyzer_send_data(handle,
 305                         Buffer,
 306                         fsp->fsp_name,
 307                         true);
 308         return result;
 309 }
 310
 311 static ssize_t smb_traffic_analyzer_pwrite(vfs_handle_struct *handle, \
 312              files_struct *fsp, const void *data, size_t n, SMB_OFF_T offset)
 313 {
 314         ssize_t result;
 315         fstring Buffer;
 316
 317         result = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
 318
 319         DEBUG(10, ("smb_traffic_analyzer_pwrite: PWRITE: %s\n", fsp->fsp_name ));
 320
 321         fstr_sprintf(Buffer, "%u", (uint) result);
 322         smb_traffic_analyzer_send_data(handle,
 323                         Buffer,
 324                         fsp->fsp_name,
 325                         true);
 326         return result;
 327 }
 328
 329 /* VFS operations we use */
 330
 331 static vfs_op_tuple smb_traffic_analyzer_tuples[] = {
 332
 333         {SMB_VFS_OP(smb_traffic_analyzer_connect), SMB_VFS_OP_CONNECT,
 334          SMB_VFS_LAYER_LOGGER},
 335         {SMB_VFS_OP(smb_traffic_analyzer_read), SMB_VFS_OP_READ,
 336          SMB_VFS_LAYER_LOGGER},
 337         {SMB_VFS_OP(smb_traffic_analyzer_pread), SMB_VFS_OP_PREAD,
 338          SMB_VFS_LAYER_LOGGER},
 339         {SMB_VFS_OP(smb_traffic_analyzer_write), SMB_VFS_OP_WRITE,
 340          SMB_VFS_LAYER_LOGGER},
 341         {SMB_VFS_OP(smb_traffic_analyzer_pwrite), SMB_VFS_OP_PWRITE,
 342          SMB_VFS_LAYER_LOGGER},
 343         {SMB_VFS_OP(NULL),SMB_VFS_OP_NOOP,SMB_VFS_LAYER_NOOP}
 344 };
 345
 346 /* Module initialization */
 347
 348 NTSTATUS vfs_smb_traffic_analyzer_init(void)
 349 {
 350         NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, \
 351                 "smb_traffic_analyzer", smb_traffic_analyzer_tuples);
 352
 353         if (!NT_STATUS_IS_OK(ret)) {
 354                 return ret;
 355         }
 356
 357         vfs_smb_traffic_analyzer_debug_level =
 358                 debug_add_class("smb_traffic_analyzer");
 359
 360         if (vfs_smb_traffic_analyzer_debug_level == -1) {
 361                 vfs_smb_traffic_analyzer_debug_level = DBGC_VFS;
 362                 DEBUG(1, ("smb_traffic_analyzer_init: Couldn't register custom"
 363                          "debugging class!\n"));
 364         } else {
 365                 DEBUG(3, ("smb_traffic_analyzer_init: Debug class number of"
 366                         "'smb_traffic_analyzer': %d\n", \
 367                         vfs_smb_traffic_analyzer_debug_level));
 368         }
 369
 370         return ret;
 371 }