s3-talloc Change TALLOC_ZERO_P() to talloc_zero()
[nivanova/samba-autobuild/.git] / 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((const 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((const 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( (const 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         /**
421          * The first byte of the state flag string represents
422          * the modules protocol subversion number, defined
423          * in smb_traffic_analyzer.h. smbtatools/smbtad are designed
424          * to handle not yet implemented protocol enhancements
425          * by ignoring them. By recognizing the SMBTA_SUBRELEASE
426          * smbtatools can tell the user to update the client
427          * software.
428          */
429         state_flags[0] = SMBTA_SUBRELEASE;
430
431         SMB_VFS_HANDLE_GET_DATA(handle, rf_sock, struct refcounted_sock, return);
432
433         if (rf_sock == NULL || rf_sock->sock == -1) {
434                 DEBUG(1, ("smb_traffic_analyzer_send_data: socket is "
435                         "closed\n"));
436                 return;
437         }
438
439         GetTimeOfDay(&tv);
440         tv_sec = tv.tv_sec;
441         tm = localtime(&tv_sec);
442         if (!tm) {
443                 return;
444         }
445         seconds=(float) (tv.tv_usec / 1000);
446
447         /*
448          * Check if anonymization is required, and if yes do this only for
449          * the username here, needed vor protocol version 1. In v2 we
450          * additionally anonymize the SID, which is done in it's marshalling
451          * function.
452          */
453         username = smb_traffic_analyzer_anonymize( talloc_tos(),
454                         handle->conn->session_info->sanitized_username,
455                         handle);
456
457         if (!username) {
458                 return;
459         }
460
461         protocol_version = lp_parm_const_string(SNUM(handle->conn),
462                                         "smb_traffic_analyzer",
463                                         "protocol_version", NULL );
464
465
466         if (protocol_version != NULL && strcmp(protocol_version,"V1") == 0) {
467
468                 struct rw_data *s_data = (struct rw_data *) data;
469
470                 /*
471                  * in case of protocol v1, ignore any vfs operations
472                  * except read,pread,write,pwrite, and set the "Write"
473                  * bool accordingly, send data and return.
474                  */
475                 if ( vfs_operation > vfs_id_pwrite ) return;
476
477                 if ( vfs_operation <= vfs_id_pread ) Write=false;
478                         else Write=true;
479
480                 str = talloc_asprintf(talloc_tos(),
481                         "V1,%u,\"%s\",\"%s\",\"%c\",\"%s\",\"%s\","
482                         "\"%04d-%02d-%02d %02d:%02d:%02d.%03d\"\n",
483                         (unsigned int) s_data->len,
484                         username,
485                         handle->conn->session_info->info3->base.domain.string,
486                         Write ? 'W' : 'R',
487                         handle->conn->connectpath,
488                         s_data->filename,
489                         tm->tm_year+1900,
490                         tm->tm_mon+1,
491                         tm->tm_mday,
492                         tm->tm_hour,
493                         tm->tm_min,
494                         tm->tm_sec,
495                         (int)seconds);
496                 len = strlen(str);
497                 if (write_data(rf_sock->sock, str, len) != len) {
498                         DEBUG(1, ("smb_traffic_analyzer_send_data_socket: "
499                         "error sending V1 protocol data to socket!\n"));
500                 return;
501                 }
502
503         } else {
504                 /**
505                  * Protocol 2 is used by default.
506                  */
507
508                 switch( vfs_operation ) {
509                 case vfs_id_open: ;
510                         str = smb_traffic_analyzer_create_string( talloc_tos(),
511                                 tm, seconds, handle, username, vfs_id_open,
512                                 3, ((struct open_data *) data)->filename,
513                                 talloc_asprintf( talloc_tos(), "%u",
514                                 ((struct open_data *) data)->mode),
515                                 talloc_asprintf( talloc_tos(), "%u",
516                                 ((struct open_data *) data)->result));
517                         break;
518                 case vfs_id_close: ;
519                         str = smb_traffic_analyzer_create_string( talloc_tos(),
520                                 tm, seconds, handle, username, vfs_id_close,
521                                 2, ((struct close_data *) data)->filename,
522                                 talloc_asprintf( talloc_tos(), "%u",
523                                 ((struct close_data *) data)->result));
524                         break;
525                 case vfs_id_mkdir: ;
526                         str = smb_traffic_analyzer_create_string( talloc_tos(),
527                                 tm, seconds, handle, username, vfs_id_mkdir, \
528                                 3, ((struct mkdir_data *) data)->path, \
529                                 talloc_asprintf( talloc_tos(), "%u", \
530                                 ((struct mkdir_data *) data)->mode), \
531                                 talloc_asprintf( talloc_tos(), "%u", \
532                                 ((struct mkdir_data *) data)->result ));
533                         break;
534                 case vfs_id_rmdir: ;
535                         str = smb_traffic_analyzer_create_string( talloc_tos(),
536                                 tm, seconds, handle, username, vfs_id_rmdir,
537                                 2, ((struct rmdir_data *) data)->path, \
538                                 talloc_asprintf( talloc_tos(), "%u", \
539                                 ((struct rmdir_data *) data)->result ));
540                         break;
541                 case vfs_id_rename: ;
542                         str = smb_traffic_analyzer_create_string( talloc_tos(),
543                                 tm, seconds, handle, username, vfs_id_rename,
544                                 3, ((struct rename_data *) data)->src, \
545                                 ((struct rename_data *) data)->dst,
546                                 talloc_asprintf(talloc_tos(), "%u", \
547                                 ((struct rename_data *) data)->result));
548                         break;
549                 case vfs_id_chdir: ;
550                         str = smb_traffic_analyzer_create_string( talloc_tos(),
551                                 tm, seconds, handle, username, vfs_id_chdir,
552                                 2, ((struct chdir_data *) data)->path, \
553                                 talloc_asprintf(talloc_tos(), "%u", \
554                                 ((struct chdir_data *) data)->result));
555                         break;
556
557                 case vfs_id_write:
558                 case vfs_id_pwrite:
559                 case vfs_id_read:
560                 case vfs_id_pread: ;
561                         str = smb_traffic_analyzer_create_string( talloc_tos(),
562                                 tm, seconds, handle, username, vfs_operation,
563                                 2, ((struct rw_data *) data)->filename, \
564                                 talloc_asprintf(talloc_tos(), "%u", \
565                                 (unsigned int)
566                                         ((struct rw_data *) data)->len));
567                         break;
568                 default:
569                         DEBUG(1, ("smb_traffic_analyzer: error! "
570                                 "wrong VFS operation id detected!\n"));
571                         return;
572                 }
573
574         }
575
576         if (!str) {
577                 DEBUG(1, ("smb_traffic_analyzer_send_data: "
578                         "unable to create string to send!\n"));
579                 return;
580         }
581
582
583         /*
584          * If configured, optain the key and run AES encryption
585          * over the data.
586          */
587         become_root();
588         akey = (char *) secrets_fetch("smb_traffic_analyzer_key", &size);
589         unbecome_root();
590         if ( akey != NULL ) {
591                 state_flags[2] = 'E';
592                 DEBUG(10, ("smb_traffic_analyzer_send_data_socket: a key was"
593                         " found, encrypting data!\n"));
594                 output = smb_traffic_analyzer_encrypt( talloc_tos(),
595                                                 akey, str, &len);
596                 SAFE_FREE(akey);
597                 header = smb_traffic_analyzer_create_header( talloc_tos(),
598                                                 state_flags, len);
599
600                 DEBUG(10, ("smb_traffic_analyzer_send_data_socket:"
601                         " header created for crypted data: %s\n", header));
602                 smb_traffic_analyzer_write_data(header, output, len,
603                                                         rf_sock->sock);
604                 return;
605
606         }
607
608         len = strlen(str);
609         header = smb_traffic_analyzer_create_header( talloc_tos(),
610                                 state_flags, len);
611         smb_traffic_analyzer_write_data(header, str, strlen(str),
612                                 rf_sock->sock);
613
614 }
615
616 static struct refcounted_sock *sock_list;
617
618 static void smb_traffic_analyzer_free_data(void **pptr)
619 {
620         struct refcounted_sock *rf_sock = *(struct refcounted_sock **)pptr;
621         if (rf_sock == NULL) {
622                 return;
623         }
624         rf_sock->ref_count--;
625         if (rf_sock->ref_count != 0) {
626                 return;
627         }
628         if (rf_sock->sock != -1) {
629                 close(rf_sock->sock);
630         }
631         DLIST_REMOVE(sock_list, rf_sock);
632         TALLOC_FREE(rf_sock);
633 }
634
635 static int smb_traffic_analyzer_connect(struct vfs_handle_struct *handle,
636                          const char *service,
637                          const char *user)
638 {
639         connection_struct *conn = handle->conn;
640         enum sock_type st = smb_traffic_analyzer_connMode(handle);
641         struct refcounted_sock *rf_sock = NULL;
642         const char *name = (st == UNIX_DOMAIN_SOCKET) ? LOCAL_PATHNAME :
643                                 lp_parm_const_string(SNUM(conn),
644                                         "smb_traffic_analyzer",
645                                 "host", "localhost");
646         uint16_t port = (st == UNIX_DOMAIN_SOCKET) ? 0 :
647                                 atoi( lp_parm_const_string(SNUM(conn),
648                                 "smb_traffic_analyzer", "port", "9430"));
649         int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
650
651         if (ret < 0) {
652                 return ret;
653         }
654
655         /* Are we already connected ? */
656         for (rf_sock = sock_list; rf_sock; rf_sock = rf_sock->next) {
657                 if (port == rf_sock->port &&
658                                 (strcmp(name, rf_sock->name) == 0)) {
659                         break;
660                 }
661         }
662
663         /* If we're connected already, just increase the
664          * reference count. */
665         if (rf_sock) {
666                 rf_sock->ref_count++;
667         } else {
668                 /* New connection. */
669                 rf_sock = talloc_zero(NULL, struct refcounted_sock);
670                 if (rf_sock == NULL) {
671                         SMB_VFS_NEXT_DISCONNECT(handle);
672                         errno = ENOMEM;
673                         return -1;
674                 }
675                 rf_sock->name = talloc_strdup(rf_sock, name);
676                 if (rf_sock->name == NULL) {
677                         SMB_VFS_NEXT_DISCONNECT(handle);
678                         TALLOC_FREE(rf_sock);
679                         errno = ENOMEM;
680                         return -1;
681                 }
682                 rf_sock->port = port;
683                 rf_sock->ref_count = 1;
684
685                 if (st == UNIX_DOMAIN_SOCKET) {
686                         rf_sock->sock = smb_traffic_analyzer_connect_unix_socket(handle,
687                                                         name);
688                 } else {
689
690                         rf_sock->sock = smb_traffic_analyzer_connect_inet_socket(handle,
691                                                         name,
692                                                         port);
693                 }
694                 if (rf_sock->sock == -1) {
695                         SMB_VFS_NEXT_DISCONNECT(handle);
696                         TALLOC_FREE(rf_sock);
697                         return -1;
698                 }
699                 DLIST_ADD(sock_list, rf_sock);
700         }
701
702         /* Store the private data. */
703         SMB_VFS_HANDLE_SET_DATA(handle, rf_sock, smb_traffic_analyzer_free_data,
704                                 struct refcounted_sock, return -1);
705         return 0;
706 }
707
708 /* VFS Functions */
709 static int smb_traffic_analyzer_chdir(vfs_handle_struct *handle, \
710                         const char *path)
711 {
712         struct chdir_data s_data;
713         s_data.result = SMB_VFS_NEXT_CHDIR(handle, path);
714         s_data.path = path;
715         DEBUG(10, ("smb_traffic_analyzer_chdir: CHDIR: %s\n", path));
716         smb_traffic_analyzer_send_data(handle, &s_data, vfs_id_chdir);
717         return s_data.result;
718 }
719
720 static int smb_traffic_analyzer_rename(vfs_handle_struct *handle, \
721                 const struct smb_filename *smb_fname_src,
722                 const struct smb_filename *smb_fname_dst)
723 {
724         struct rename_data s_data;
725         s_data.result = SMB_VFS_NEXT_RENAME(handle, smb_fname_src, \
726                 smb_fname_dst);
727         s_data.src = smb_fname_src->base_name;
728         s_data.dst = smb_fname_dst->base_name;
729         DEBUG(10, ("smb_traffic_analyzer_rename: RENAME: %s / %s\n",
730                 smb_fname_src->base_name,
731                 smb_fname_dst->base_name));
732         smb_traffic_analyzer_send_data(handle, &s_data, vfs_id_rename);
733         return s_data.result;
734 }
735
736 static int smb_traffic_analyzer_rmdir(vfs_handle_struct *handle, \
737                         const char *path)
738 {
739         struct rmdir_data s_data;
740         s_data.result = SMB_VFS_NEXT_RMDIR(handle, path);
741         s_data.path = path;
742         DEBUG(10, ("smb_traffic_analyzer_rmdir: RMDIR: %s\n", path));
743         smb_traffic_analyzer_send_data(handle, &s_data, vfs_id_rmdir);
744         return s_data.result;
745 }
746
747 static int smb_traffic_analyzer_mkdir(vfs_handle_struct *handle, \
748                         const char *path, mode_t mode)
749 {
750         struct mkdir_data s_data;
751         s_data.result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
752         s_data.path = path;
753         s_data.mode = mode;
754         DEBUG(10, ("smb_traffic_analyzer_mkdir: MKDIR: %s\n", path));
755         smb_traffic_analyzer_send_data(handle,
756                         &s_data,
757                         vfs_id_mkdir);
758         return s_data.result;
759 }
760
761 static ssize_t smb_traffic_analyzer_sendfile(vfs_handle_struct *handle,
762                                 int tofd,
763                                 files_struct *fromfsp,
764                                 const DATA_BLOB *hdr,
765                                 SMB_OFF_T offset,
766                                 size_t n)
767 {
768         struct rw_data s_data;
769         s_data.len = SMB_VFS_NEXT_SENDFILE(handle,
770                         tofd, fromfsp, hdr, offset, n);
771         s_data.filename = fromfsp->fsp_name->base_name;
772         DEBUG(10, ("smb_traffic_analyzer_sendfile: sendfile(r): %s\n",
773                 fsp_str_dbg(fromfsp)));
774         smb_traffic_analyzer_send_data(handle,
775                 &s_data,
776                 vfs_id_read);
777         return s_data.len;
778 }
779
780 static ssize_t smb_traffic_analyzer_recvfile(vfs_handle_struct *handle,
781                                 int fromfd,
782                                 files_struct *tofsp,
783                                 SMB_OFF_T offset,
784                                 size_t n)
785 {
786         struct rw_data s_data;
787         s_data.len = SMB_VFS_NEXT_RECVFILE(handle,
788                         fromfd, tofsp, offset, n);
789         s_data.filename = tofsp->fsp_name->base_name;
790         DEBUG(10, ("smb_traffic_analyzer_recvfile: recvfile(w): %s\n",
791                 fsp_str_dbg(tofsp)));
792         smb_traffic_analyzer_send_data(handle,
793                 &s_data,
794                 vfs_id_write);
795         return s_data.len;
796 }
797
798
799 static ssize_t smb_traffic_analyzer_read(vfs_handle_struct *handle, \
800                                 files_struct *fsp, void *data, size_t n)
801 {
802         struct rw_data s_data;
803
804         s_data.len = SMB_VFS_NEXT_READ(handle, fsp, data, n);
805         s_data.filename = fsp->fsp_name->base_name;
806         DEBUG(10, ("smb_traffic_analyzer_read: READ: %s\n", fsp_str_dbg(fsp)));
807
808         smb_traffic_analyzer_send_data(handle,
809                         &s_data,
810                         vfs_id_read);
811         return s_data.len;
812 }
813
814
815 static ssize_t smb_traffic_analyzer_pread(vfs_handle_struct *handle, \
816                 files_struct *fsp, void *data, size_t n, SMB_OFF_T offset)
817 {
818         struct rw_data s_data;
819
820         s_data.len = SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
821         s_data.filename = fsp->fsp_name->base_name;
822         DEBUG(10, ("smb_traffic_analyzer_pread: PREAD: %s\n",
823                    fsp_str_dbg(fsp)));
824
825         smb_traffic_analyzer_send_data(handle,
826                         &s_data,
827                         vfs_id_pread);
828
829         return s_data.len;
830 }
831
832 static ssize_t smb_traffic_analyzer_write(vfs_handle_struct *handle, \
833                         files_struct *fsp, const void *data, size_t n)
834 {
835         struct rw_data s_data;
836
837         s_data.len = SMB_VFS_NEXT_WRITE(handle, fsp, data, n);
838         s_data.filename = fsp->fsp_name->base_name;
839         DEBUG(10, ("smb_traffic_analyzer_write: WRITE: %s\n",
840                    fsp_str_dbg(fsp)));
841
842         smb_traffic_analyzer_send_data(handle,
843                         &s_data,
844                         vfs_id_write);
845         return s_data.len;
846 }
847
848 static ssize_t smb_traffic_analyzer_pwrite(vfs_handle_struct *handle, \
849              files_struct *fsp, const void *data, size_t n, SMB_OFF_T offset)
850 {
851         struct rw_data s_data;
852
853         s_data.len = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
854         s_data.filename = fsp->fsp_name->base_name;
855         DEBUG(10, ("smb_traffic_analyzer_pwrite: PWRITE: %s\n", \
856                 fsp_str_dbg(fsp)));
857
858         smb_traffic_analyzer_send_data(handle,
859                         &s_data,
860                         vfs_id_pwrite);
861         return s_data.len;
862 }
863
864 static int smb_traffic_analyzer_open(vfs_handle_struct *handle, \
865         struct smb_filename *smb_fname, files_struct *fsp,\
866         int flags, mode_t mode)
867 {
868         struct open_data s_data;
869
870         s_data.result = SMB_VFS_NEXT_OPEN( handle, smb_fname, fsp,
871                         flags, mode);
872         DEBUG(10,("smb_traffic_analyzer_open: OPEN: %s\n",
873                 fsp_str_dbg(fsp)));
874         s_data.filename = fsp->fsp_name->base_name;
875         s_data.mode = mode;
876         smb_traffic_analyzer_send_data(handle,
877                         &s_data,
878                         vfs_id_open);
879         return s_data.result;
880 }
881
882 static int smb_traffic_analyzer_close(vfs_handle_struct *handle, \
883         files_struct *fsp)
884 {
885         struct close_data s_data;
886         s_data.result = SMB_VFS_NEXT_CLOSE(handle, fsp);
887         DEBUG(10,("smb_traffic_analyzer_close: CLOSE: %s\n",
888                 fsp_str_dbg(fsp)));
889         s_data.filename = fsp->fsp_name->base_name;
890         smb_traffic_analyzer_send_data(handle,
891                         &s_data,
892                         vfs_id_close);
893         return s_data.result;
894 }
895
896         
897 static struct vfs_fn_pointers vfs_smb_traffic_analyzer_fns = {
898         .connect_fn = smb_traffic_analyzer_connect,
899         .vfs_read = smb_traffic_analyzer_read,
900         .pread = smb_traffic_analyzer_pread,
901         .write = smb_traffic_analyzer_write,
902         .pwrite = smb_traffic_analyzer_pwrite,
903         .mkdir = smb_traffic_analyzer_mkdir,
904         .rename = smb_traffic_analyzer_rename,
905         .chdir = smb_traffic_analyzer_chdir,
906         .open_fn = smb_traffic_analyzer_open,
907         .rmdir = smb_traffic_analyzer_rmdir,
908         .close_fn = smb_traffic_analyzer_close,
909         .sendfile = smb_traffic_analyzer_sendfile,
910         .recvfile = smb_traffic_analyzer_recvfile
911 };
912
913 /* Module initialization */
914 NTSTATUS vfs_smb_traffic_analyzer_init(void)
915 {
916         NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
917                                         "smb_traffic_analyzer",
918                                         &vfs_smb_traffic_analyzer_fns);
919
920         if (!NT_STATUS_IS_OK(ret)) {
921                 return ret;
922         }
923
924         vfs_smb_traffic_analyzer_debug_level =
925                 debug_add_class("smb_traffic_analyzer");
926
927         if (vfs_smb_traffic_analyzer_debug_level == -1) {
928                 vfs_smb_traffic_analyzer_debug_level = DBGC_VFS;
929                 DEBUG(1, ("smb_traffic_analyzer_init: Couldn't register custom"
930                          "debugging class!\n"));
931         } else {
932                 DEBUG(3, ("smb_traffic_analyzer_init: Debug class number of"
933                         "'smb_traffic_analyzer': %d\n", \
934                         vfs_smb_traffic_analyzer_debug_level));
935         }
936
937         return ret;
938 }