source3/msdfs/msdfs.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 3.0
   4    MSDfs services for Samba
   5    Copyright (C) Shirish Kalele 2000
   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 2 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, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23
  24 extern pstring global_myname;
  25
  26 /**********************************************************************
  27  Create a tcon relative path from a dfs_path structure
  28  **********************************************************************/
  29
  30 static void create_nondfs_path(char* pathname, struct dfs_path* pdp)
  31 {
  32         pstrcpy(pathname,pdp->volumename);
  33         pstrcat(pathname,"\\");
  34         pstrcat(pathname,pdp->restofthepath);
  35 }
  36
  37 /**********************************************************************
  38   Parse the pathname  of the form \hostname\service\volume\restofthepath
  39   into the dfs_path structure
  40  **********************************************************************/
  41
  42 static BOOL parse_dfs_path(char* pathname, struct dfs_path* pdp)
  43 {
  44         pstring pathname_local;
  45         char* p,*temp;
  46
  47         pstrcpy(pathname_local,pathname);
  48         p = temp = pathname_local;
  49
  50         ZERO_STRUCTP(pdp);
  51
  52         trim_string(temp,"\\","\\");
  53         DEBUG(10,("temp in parse_dfs_path: .%s. after trimming \\'s\n",temp));
  54
  55         /* now tokenize */
  56         /* parse out hostname */
  57         p = strchr_m(temp,'\\');
  58         if(p == NULL)
  59                 return False;
  60         *p = '\0';
  61         pstrcpy(pdp->hostname,temp);
  62         DEBUG(10,("hostname: %s\n",pdp->hostname));
  63
  64         /* parse out servicename */
  65         temp = p+1;
  66         p = strchr_m(temp,'\\');
  67         if(p == NULL) {
  68                 pstrcpy(pdp->servicename,temp);
  69                 return True;
  70         }
  71         *p = '\0';
  72         pstrcpy(pdp->servicename,temp);
  73         DEBUG(10,("servicename: %s\n",pdp->servicename));
  74
  75         /* parse out volumename */
  76         temp = p+1;
  77         p = strchr_m(temp,'\\');
  78         if(p == NULL) {
  79                 pstrcpy(pdp->volumename,temp);
  80                 return True;
  81         }
  82         *p = '\0';
  83         pstrcpy(pdp->volumename,temp);
  84         DEBUG(10,("volumename: %s\n",pdp->volumename));
  85
  86         /* remaining path .. */
  87         pstrcpy(pdp->restofthepath,p+1);
  88         DEBUG(10,("rest of the path: %s\n",pdp->restofthepath));
  89         return True;
  90 }
  91
  92 /********************************************************
  93  Fake up a connection struct for the VFS layer.
  94 *********************************************************/
  95
  96 static BOOL create_conn_struct( connection_struct *conn, int snum, char *path)
  97 {
  98         ZERO_STRUCTP(conn);
  99         conn->service = snum;
 100         conn->connectpath = path;
 101
 102         if (!vfs_init(conn)) {
 103                 DEBUG(0,("create_conn_struct: vfs init failed.\n"));
 104                 return False;
 105         }
 106         return True;
 107 }
 108
 109 /**********************************************************************
 110  Forms a valid Unix pathname from the junction
 111  **********************************************************************/
 112
 113 static BOOL form_path_from_junction(struct junction_map* jn, char* path, int max_pathlen,
 114                                                                 connection_struct *conn)
 115 {
 116         int snum;
 117
 118         if(!path || !jn)
 119                 return False;
 120
 121         snum = lp_servicenumber(jn->service_name);
 122         if(snum < 0)
 123                 return False;
 124
 125         safe_strcpy(path, lp_pathname(snum), max_pathlen-1);
 126         safe_strcat(path, "/", max_pathlen-1);
 127         strlower(jn->volume_name);
 128         safe_strcat(path, jn->volume_name, max_pathlen-1);
 129
 130         if (!create_conn_struct(conn, snum, path))
 131                 return False;
 132
 133         return True;
 134 }
 135
 136 /**********************************************************************
 137  Creates a junction structure from the Dfs pathname
 138  **********************************************************************/
 139
 140 BOOL create_junction(char* pathname, struct junction_map* jn)
 141 {
 142         struct dfs_path dp;
 143
 144         parse_dfs_path(pathname,&dp);
 145
 146         /* check if path is dfs : check hostname is the first token */
 147         if(global_myname && (strcasecmp(global_myname,dp.hostname)!=0)) {
 148                 DEBUG(4,("create_junction: Invalid hostname %s in dfs path %s\n", dp.hostname, pathname));
 149                 return False;
 150         }
 151
 152         /* Check for a non-DFS share */
 153         if(!lp_msdfs_root(lp_servicenumber(dp.servicename))) {
 154                 DEBUG(4,("create_junction: %s is not an msdfs root.\n", dp.servicename));
 155                 return False;
 156         }
 157
 158         pstrcpy(jn->service_name,dp.servicename);
 159         pstrcpy(jn->volume_name,dp.volumename);
 160         return True;
 161 }
 162
 163 /**********************************************************************
 164  Parse the contents of a symlink to verify if it is an msdfs referral
 165  A valid referral is of the form: msdfs:server1\share1,server2\share2
 166  **********************************************************************/
 167
 168 static BOOL parse_symlink(char* buf,struct referral** preflist, int* refcount)
 169 {
 170         pstring temp;
 171         char* prot;
 172         char* alt_path[MAX_REFERRAL_COUNT];
 173         int count=0, i;
 174         struct referral* reflist;
 175
 176         pstrcpy(temp,buf);
 177
 178         prot = strtok(temp,":");
 179
 180         if(!strequal(prot, "msdfs"))
 181                 return False;
 182
 183         /* It's an msdfs referral */
 184         if(!preflist)
 185                 return True;
 186
 187         /* parse out the alternate paths */
 188         while(((alt_path[count] = strtok(NULL,",")) != NULL) && count<MAX_REFERRAL_COUNT)
 189                 count++;
 190
 191         DEBUG(10,("parse_symlink: count=%d\n", count));
 192
 193         reflist = *preflist = (struct referral*) malloc(count * sizeof(struct referral));
 194         if(reflist == NULL) {
 195                 DEBUG(0,("parse_symlink: Malloc failed!\n"));
 196                 return False;
 197         }
 198
 199         for(i=0;i<count;i++) {
 200                 /* replace / in the alternate path by a \ */
 201                 char* p = strchr_m(alt_path[i],'/');
 202                 if(p)
 203                         *p = '\\';
 204
 205                 pstrcpy(reflist[i].alternate_path, "\\");
 206                 pstrcat(reflist[i].alternate_path, alt_path[i]);
 207                 reflist[i].proximity = 0;
 208                 reflist[i].ttl = REFERRAL_TTL;
 209                 DEBUG(10, ("parse_symlink: Created alt path: %s\n", reflist[i].alternate_path));
 210         }
 211
 212         if(refcount)
 213                 *refcount = count;
 214
 215         return True;
 216 }
 217
 218 /**********************************************************************
 219  Returns true if the unix path is a valid msdfs symlink
 220  **********************************************************************/
 221
 222 BOOL is_msdfs_link(connection_struct* conn, char* path)
 223 {
 224         SMB_STRUCT_STAT st;
 225         pstring referral;
 226         int referral_len = 0;
 227
 228         if(!path || !conn)
 229                 return False;
 230
 231         strlower(path);
 232
 233         if(conn->vfs_ops.lstat(conn,path,&st) != 0) {
 234                 DEBUG(5,("is_msdfs_link: %s does not exist.\n",path));
 235                 return False;
 236         }
 237
 238         if(S_ISLNK(st.st_mode)) {
 239                 /* open the link and read it */
 240                 referral_len = conn->vfs_ops.readlink(conn, path, referral, sizeof(pstring));
 241                 if(referral_len == -1)
 242                         DEBUG(0,("is_msdfs_link: Error reading msdfs link %s: %s\n", path, strerror(errno)));
 243
 244                 referral[referral_len] = '\0';
 245                 DEBUG(5,("is_msdfs_link: %s -> %s\n",path,referral));
 246                 if(parse_symlink(referral, NULL, NULL))
 247                         return True;
 248         }
 249         return False;
 250 }
 251
 252 /**********************************************************************
 253  Fills in the junction_map struct with the referrals from the
 254  symbolic link
 255  **********************************************************************/
 256
 257 BOOL get_referred_path(struct junction_map* junction)
 258 {
 259         pstring path;
 260         pstring buf;
 261         SMB_STRUCT_STAT st;
 262         connection_struct conns;
 263         connection_struct *conn = &conns;
 264
 265         if(!form_path_from_junction(junction, path, sizeof(path), conn))
 266                 return False;
 267
 268         DEBUG(5,("get_referred_path: lstat target: %s\n", path));
 269
 270         if(conn->vfs_ops.lstat(conn,path,&st) != 0) {
 271                 DEBUG(5,("get_referred_path: %s does not exist.\n",path));
 272                 return False;
 273         }
 274
 275         if(S_ISLNK(st.st_mode)) {
 276                 /* open the link and read it to get the dfs referral */
 277                 int linkcnt = 0;
 278                 linkcnt = conn->vfs_ops.readlink(conn, path, buf, sizeof(buf));
 279                 buf[linkcnt] = '\0';
 280                 DEBUG(5,("get_referred_path: Referral: %s\n",buf));
 281                 if(parse_symlink(buf, &junction->referral_list, &junction->referral_count))
 282                         return True;
 283         }
 284         return False;
 285 }
 286
 287 /**************************************************************
 288 Decides if given pathname is Dfs and if it should be redirected
 289 Converts pathname to non-dfs format if Dfs redirection not required
 290 **************************************************************/
 291
 292 BOOL dfs_redirect(char* pathname, connection_struct* conn)
 293 {
 294         struct dfs_path dp;
 295         pstring temp;
 296         fstring path;
 297
 298         pstrcpy(temp,pathname);
 299
 300         if(!lp_msdfs_root(SNUM(conn)) )
 301                 return False;
 302
 303         parse_dfs_path(pathname,&dp);
 304
 305         if(global_myname && (strcasecmp(global_myname,dp.hostname)!=0))
 306                 return False;
 307
 308         /* check if need to redirect */
 309         fstrcpy(path, conn->connectpath);
 310         fstrcat(path, "/");
 311         fstrcat(path, dp.volumename);
 312         if(is_msdfs_link(conn, path)) {
 313                 DEBUG(4,("dfs_redirect: Redirecting %s\n",temp));
 314                 return True;
 315         } else {
 316                 create_nondfs_path(pathname,&dp);
 317                 DEBUG(4,("dfs_redirect: Not redirecting %s. Converted to non-dfs pathname \'%s\'\n",
 318                                 temp,pathname));
 319                 return False;
 320         }
 321 }
 322
 323 /*
 324   Special DFS redirect call for findfirst's.
 325   If the findfirst is for the dfs junction, then no redirection,
 326   if it is for the underlying directory contents, redirect.
 327   */
 328
 329 BOOL dfs_findfirst_redirect(char* pathname, connection_struct* conn)
 330 {
 331         struct dfs_path dp;
 332
 333         pstring temp;
 334
 335         pstrcpy(temp,pathname);
 336
 337         /* Is the path Dfs-redirectable? */
 338         if(!dfs_redirect(temp,conn)) {
 339                 pstrcpy(pathname,temp);
 340                 return False;
 341         }
 342
 343         parse_dfs_path(pathname,&dp);
 344         DEBUG(8,("dfs_findfirst_redirect: path %s is in Dfs. dp.restofthepath=.%s.\n",
 345                                 pathname,dp.restofthepath));
 346         if(!(*(dp.restofthepath))) {
 347                 create_nondfs_path(pathname,&dp);
 348                 return False;
 349         }
 350
 351         return True;
 352 }
 353
 354 static int setup_ver2_dfs_referral(char* pathname, char** ppdata,
 355                                    struct junction_map* junction,
 356                                    BOOL self_referral)
 357 {
 358         char* pdata = *ppdata;
 359
 360         unsigned char uni_requestedpath[1024];
 361         int uni_reqpathoffset1,uni_reqpathoffset2;
 362         int uni_curroffset;
 363         int requestedpathlen=0;
 364         int offset;
 365         int reply_size = 0;
 366         int i=0;
 367
 368         DEBUG(10,("setting up version2 referral\nRequested path:\n"));
 369
 370         requestedpathlen = rpcstr_push(uni_requestedpath, pathname, -1,
 371                                        STR_TERMINATE);
 372
 373         dump_data(10,uni_requestedpath,requestedpathlen);
 374
 375         DEBUG(10,("ref count = %u\n",junction->referral_count));
 376
 377         uni_reqpathoffset1 = REFERRAL_HEADER_SIZE +
 378                         VERSION2_REFERRAL_SIZE * junction->referral_count;
 379
 380         uni_reqpathoffset2 = uni_reqpathoffset1 + requestedpathlen;
 381
 382         uni_curroffset = uni_reqpathoffset2 + requestedpathlen;
 383
 384         reply_size = REFERRAL_HEADER_SIZE + VERSION2_REFERRAL_SIZE*junction->referral_count +
 385                                         2 * requestedpathlen;
 386         DEBUG(10,("reply_size: %u\n",reply_size));
 387
 388         /* add up the unicode lengths of all the referral paths */
 389         for(i=0;i<junction->referral_count;i++) {
 390                 DEBUG(10,("referral %u : %s\n",i,junction->referral_list[i].alternate_path));
 391                 reply_size += (strlen(junction->referral_list[i].alternate_path)+1)*2;
 392         }
 393
 394         DEBUG(10,("reply_size = %u\n",reply_size));
 395         /* add the unexplained 0x16 bytes */
 396         reply_size += 0x16;
 397
 398         pdata = Realloc(pdata,reply_size);
 399         if(pdata == NULL) {
 400                 DEBUG(0,("malloc failed for Realloc!\n"));
 401                 return -1;
 402         }
 403         else *ppdata = pdata;
 404
 405         /* copy in the dfs requested paths.. required for offset calculations */
 406         memcpy(pdata+uni_reqpathoffset1,uni_requestedpath,requestedpathlen);
 407         memcpy(pdata+uni_reqpathoffset2,uni_requestedpath,requestedpathlen);
 408
 409         /* create the header */
 410         SSVAL(pdata,0,requestedpathlen-2); /* path consumed */
 411         SSVAL(pdata,2,junction->referral_count); /* number of referral in this pkt */
 412         if(self_referral)
 413                 SIVAL(pdata,4,DFSREF_REFERRAL_SERVER | DFSREF_STORAGE_SERVER);
 414         else
 415                 SIVAL(pdata,4,DFSREF_STORAGE_SERVER);
 416
 417         offset = 8;
 418         /* add the referral elements */
 419         for(i=0;i<junction->referral_count;i++) {
 420                 struct referral* ref = &(junction->referral_list[i]);
 421                 int unilen;
 422
 423                 SSVAL(pdata,offset,2); /* version 2 */
 424                 SSVAL(pdata,offset+2,VERSION2_REFERRAL_SIZE);
 425                 if(self_referral)
 426                         SSVAL(pdata,offset+4,1);
 427                 else
 428                         SSVAL(pdata,offset+4,0);
 429                 SSVAL(pdata,offset+6,0); /* ref_flags :use path_consumed bytes? */
 430                 SIVAL(pdata,offset+8,ref->proximity);
 431                 SIVAL(pdata,offset+12,ref->ttl);
 432
 433                 SSVAL(pdata,offset+16,uni_reqpathoffset1-offset);
 434                 SSVAL(pdata,offset+18,uni_reqpathoffset2-offset);
 435                 /* copy referred path into current offset */
 436                 unilen = rpcstr_push(pdata+uni_curroffset, ref->alternate_path,
 437                                      -1, STR_UNICODE);
 438                 SSVAL(pdata,offset+20,uni_curroffset-offset);
 439
 440                 uni_curroffset += unilen;
 441                 offset += VERSION2_REFERRAL_SIZE;
 442         }
 443         /* add in the unexplained 22 (0x16) bytes at the end */
 444         memset(pdata+uni_curroffset,'\0',0x16);
 445         SAFE_FREE(junction->referral_list);
 446         return reply_size;
 447 }
 448
 449 static int setup_ver3_dfs_referral(char* pathname, char** ppdata,
 450                                    struct junction_map* junction,
 451                                    BOOL self_referral)
 452 {
 453         char* pdata = *ppdata;
 454
 455         unsigned char uni_reqpath[1024];
 456         int uni_reqpathoffset1, uni_reqpathoffset2;
 457         int uni_curroffset;
 458         int reply_size = 0;
 459
 460         int reqpathlen = 0;
 461         int offset,i=0;
 462
 463         DEBUG(10,("setting up version3 referral\n"));
 464
 465         reqpathlen = rpcstr_push(uni_reqpath, pathname, -1, STR_TERMINATE);
 466
 467         dump_data(10,uni_reqpath,reqpathlen);
 468
 469         uni_reqpathoffset1 = REFERRAL_HEADER_SIZE + VERSION3_REFERRAL_SIZE * junction->referral_count;
 470         uni_reqpathoffset2 = uni_reqpathoffset1 + reqpathlen;
 471         reply_size = uni_curroffset = uni_reqpathoffset2 + reqpathlen;
 472
 473         for(i=0;i<junction->referral_count;i++) {
 474                 DEBUG(10,("referral %u : %s\n",i,junction->referral_list[i].alternate_path));
 475                 reply_size += (strlen(junction->referral_list[i].alternate_path)+1)*2;
 476         }
 477
 478         pdata = Realloc(pdata,reply_size);
 479         if(pdata == NULL) {
 480                 DEBUG(0,("version3 referral setup: malloc failed for Realloc!\n"));
 481                 return -1;
 482         }
 483         else *ppdata = pdata;
 484
 485         /* create the header */
 486         SSVAL(pdata,0,reqpathlen-2); /* path consumed */
 487         SSVAL(pdata,2,junction->referral_count); /* number of referral in this pkt */
 488         if(self_referral)
 489                 SIVAL(pdata,4,DFSREF_REFERRAL_SERVER | DFSREF_STORAGE_SERVER);
 490         else
 491                 SIVAL(pdata,4,DFSREF_STORAGE_SERVER);
 492
 493         /* copy in the reqpaths */
 494         memcpy(pdata+uni_reqpathoffset1,uni_reqpath,reqpathlen);
 495         memcpy(pdata+uni_reqpathoffset2,uni_reqpath,reqpathlen);
 496
 497         offset = 8;
 498         for(i=0;i<junction->referral_count;i++) {
 499                 struct referral* ref = &(junction->referral_list[i]);
 500                 int unilen;
 501
 502                 SSVAL(pdata,offset,3); /* version 3 */
 503                 SSVAL(pdata,offset+2,VERSION3_REFERRAL_SIZE);
 504                 if(self_referral)
 505                         SSVAL(pdata,offset+4,1);
 506                 else
 507                         SSVAL(pdata,offset+4,0);
 508
 509                 SSVAL(pdata,offset+6,0); /* ref_flags :use path_consumed bytes? */
 510                 SIVAL(pdata,offset+8,ref->ttl);
 511
 512                 SSVAL(pdata,offset+12,uni_reqpathoffset1-offset);
 513                 SSVAL(pdata,offset+14,uni_reqpathoffset2-offset);
 514                 /* copy referred path into current offset */
 515
 516                 unilen = rpcstr_push(pdata+uni_curroffset, ref->alternate_path,
 517                                      -1, STR_UNICODE|STR_TERMINATE);
 518                 SSVAL(pdata,offset+16,uni_curroffset-offset);
 519                 /* copy 0x10 bytes of 00's in the ServiceSite GUID */
 520                 memset(pdata+offset+18,'\0',16);
 521
 522                 uni_curroffset += unilen;
 523                 offset += VERSION3_REFERRAL_SIZE;
 524         }
 525         SAFE_FREE(junction->referral_list);
 526         return reply_size;
 527 }
 528
 529 /******************************************************************
 530  * Set up the Dfs referral for the dfs pathname
 531  ******************************************************************/
 532
 533 int setup_dfs_referral(char* pathname, int max_referral_level, char** ppdata)
 534 {
 535         struct junction_map junction;
 536
 537         BOOL self_referral;
 538
 539         int reply_size = 0;
 540
 541         ZERO_STRUCT(junction);
 542
 543         if(!create_junction(pathname, &junction))
 544                 return -1;
 545
 546         /* get the junction entry */
 547         if(!get_referred_path(&junction)) {
 548
 549                 /* refer the same pathname, create a standard referral struct */
 550                 struct referral* ref;
 551                 self_referral = True;
 552                 junction.referral_count = 1;
 553                 if((ref = (struct referral*) malloc(sizeof(struct referral))) == NULL) {
 554                         DEBUG(0,("malloc failed for referral\n"));
 555                         return -1;
 556                 }
 557
 558                 pstrcpy(ref->alternate_path,pathname);
 559                 ref->proximity = 0;
 560                 ref->ttl = REFERRAL_TTL;
 561                 junction.referral_list = ref;
 562         } else {
 563                 self_referral = False;
 564                 if( DEBUGLVL( 3 ) ) {
 565                         int i=0;
 566                         dbgtext("setup_dfs_referral: Path %s to alternate path(s):",pathname);
 567                         for(i=0;i<junction.referral_count;i++)
 568                                 dbgtext(" %s",junction.referral_list[i].alternate_path);
 569                         dbgtext(".\n");
 570                 }
 571         }
 572
 573         /* create the referral depeding on version */
 574         DEBUG(10,("max_referral_level :%d\n",max_referral_level));
 575         if(max_referral_level<2 || max_referral_level>3)
 576                 max_referral_level = 2;
 577
 578         switch(max_referral_level) {
 579         case 2:
 580                 {
 581                 reply_size = setup_ver2_dfs_referral(pathname, ppdata, &junction, self_referral);
 582                 break;
 583                 }
 584         case 3:
 585                 {
 586                 reply_size = setup_ver3_dfs_referral(pathname, ppdata, &junction, self_referral);
 587                 break;
 588                 }
 589         default:
 590                 {
 591                 DEBUG(0,("setup_dfs_referral: Invalid dfs referral version: %d\n", max_referral_level));
 592                 return -1;
 593                 }
 594         }
 595
 596         DEBUG(10,("DFS Referral pdata:\n"));
 597         dump_data(10,*ppdata,reply_size);
 598         return reply_size;
 599 }
 600
 601 /**********************************************************************
 602  The following functions are called by the NETDFS RPC pipe functions
 603  **********************************************************************/
 604
 605 BOOL create_msdfs_link(struct junction_map* jn, BOOL exists)
 606 {
 607         pstring path;
 608         pstring msdfs_link;
 609         connection_struct conns;
 610         connection_struct *conn = &conns;
 611         int i=0;
 612
 613         if(!form_path_from_junction(jn, path, sizeof(path), conn))
 614                 return False;
 615
 616         /* form the msdfs_link contents */
 617         pstrcpy(msdfs_link, "msdfs:");
 618         for(i=0; i<jn->referral_count; i++) {
 619                 char* refpath = jn->referral_list[i].alternate_path;
 620
 621                 trim_string(refpath, "\\", "\\");
 622                 if(*refpath == '\0')
 623                         continue;
 624
 625                 if(i>0)
 626                         pstrcat(msdfs_link, ",");
 627
 628                 pstrcat(msdfs_link, refpath);
 629         }
 630
 631         DEBUG(5,("create_msdfs_link: Creating new msdfs link: %s -> %s\n", path, msdfs_link));
 632
 633         if(exists)
 634                 if(conn->vfs_ops.unlink(conn,path)!=0)
 635                         return False;
 636
 637         if(conn->vfs_ops.symlink(conn, msdfs_link, path) < 0) {
 638                 DEBUG(1,("create_msdfs_link: symlink failed %s -> %s\nError: %s\n",
 639                                 path, msdfs_link, strerror(errno)));
 640                 return False;
 641         }
 642         return True;
 643 }
 644
 645 BOOL remove_msdfs_link(struct junction_map* jn)
 646 {
 647         pstring path;
 648         connection_struct conns;
 649         connection_struct *conn = &conns;
 650
 651         if(!form_path_from_junction(jn, path, sizeof(path), conn))
 652                 return False;
 653
 654         if(conn->vfs_ops.unlink(conn, path)!=0)
 655                 return False;
 656
 657         return True;
 658 }
 659
 660 static BOOL form_junctions(int snum, struct junction_map* jn, int* jn_count)
 661 {
 662         int cnt = *jn_count;
 663         DIR *dirp;
 664         char* dname;
 665         pstring connect_path;
 666         char* service_name = lp_servicename(snum);
 667         connection_struct conns;
 668         connection_struct *conn = &conns;
 669
 670         pstrcpy(connect_path,lp_pathname(snum));
 671
 672         if(*connect_path == '\0')
 673                 return False;
 674
 675         /*
 676          * Fake up a connection struct for the VFS layer.
 677          */
 678
 679         if (!create_conn_struct(conn, snum, connect_path))
 680                 return False;
 681
 682         /* form a junction for the msdfs root - convention */
 683         /*
 684                 pstrpcy(jn[cnt].service_name, service_name);
 685                 jn[cnt].volume_name[0] = '\0';
 686                 jn[cnt].referral_count = 1;
 687
 688                 slprintf(alt_path,sizeof(alt_path)-1"\\\\%s\\%s", global_myname, service_name);
 689                 jn[cnt].referral_l
 690         */
 691
 692         dirp = conn->vfs_ops.opendir(conn, connect_path);
 693         if(!dirp)
 694                 return False;
 695
 696         while((dname = vfs_readdirname(conn, dirp)) != NULL) {
 697                 SMB_STRUCT_STAT st;
 698                 pstring pathreal;
 699                 fstring buf;
 700                 int buflen = 0;
 701                 pstrcpy(pathreal, connect_path);
 702                 pstrcat(pathreal, "/");
 703                 pstrcat(pathreal, dname);
 704
 705                 if(conn->vfs_ops.lstat(conn,pathreal,&st) != 0) {
 706                         DEBUG(4,("lstat error for %s: %s\n",pathreal, strerror(errno)));
 707                         continue;
 708                 }
 709                 if(S_ISLNK(st.st_mode)) {
 710                         buflen = conn->vfs_ops.readlink(conn, pathreal, buf, sizeof(fstring));
 711                         buf[buflen] = '\0';
 712                         if(parse_symlink(buf, &(jn[cnt].referral_list), &(jn[cnt].referral_count))) {
 713                                 pstrcpy(jn[cnt].service_name, service_name);
 714                                 pstrcpy(jn[cnt].volume_name, dname);
 715                                 cnt++;
 716                         }
 717                 }
 718         }
 719
 720         conn->vfs_ops.closedir(conn,dirp);
 721         *jn_count = cnt;
 722         return True;
 723 }
 724
 725 int enum_msdfs_links(struct junction_map* jn)
 726 {
 727         int i=0;
 728         int jn_count = 0;
 729
 730         if(!lp_host_msdfs())
 731                 return -1;
 732
 733         for(i=0;*lp_servicename(i);i++) {
 734                 if(lp_msdfs_root(i))
 735                         form_junctions(i,jn,&jn_count);
 736         }
 737         return jn_count;
 738 }