src/sys/pioctl_nt.c

   1 /*
   2  * Copyright 2000, International Business Machines Corporation and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  */
   9
  10 #include <afsconfig.h>
  11 #include <afs/param.h>
  12
  13 RCSID
  14     ("$Header$");
  15
  16 #include <afs/stds.h>
  17 #include <windows.h>
  18 #include <stdlib.h>
  19 #include <stdio.h>
  20 #include <errno.h>
  21 #include <malloc.h>
  22 #include <string.h>
  23 #include <winioctl.h>
  24 #include <winsock2.h>
  25 #define SECURITY_WIN32
  26 #include <security.h>
  27 #include <nb30.h>
  28
  29 #include <osi.h>
  30
  31 #include <cm.h>
  32 #include <cm_dir.h>
  33 #include <cm_cell.h>
  34 #include <cm_user.h>
  35 #include <cm_conn.h>
  36 #include <cm_scache.h>
  37 #include <cm_buf.h>
  38 #include <cm_utils.h>
  39 #include <cm_ioctl.h>
  40
  41 #include <smb.h>
  42 #include <pioctl_nt.h>
  43 #include <WINNT/afsreg.h>
  44 #include <lanahelper.h>
  45
  46 #include <loadfuncs-krb5.h>
  47 #include <krb5.h>
  48
  49 static char AFSConfigKeyName[] = AFSREG_CLT_SVC_PARAM_SUBKEY;
  50
  51 #define FS_IOCTLREQUEST_MAXSIZE 8192
  52 /* big structure for representing and storing an IOCTL request */
  53 typedef struct fs_ioctlRequest {
  54     char *mp;                   /* marshalling/unmarshalling ptr */
  55     long nbytes;                /* bytes received (when unmarshalling) */
  56     char data[FS_IOCTLREQUEST_MAXSIZE]; /* data we're marshalling */
  57 } fs_ioctlRequest_t;
  58
  59 static int
  60 CMtoUNIXerror(int cm_code)
  61 {
  62     switch (cm_code) {
  63     case CM_ERROR_TIMEDOUT:
  64         return ETIMEDOUT;
  65     case CM_ERROR_NOACCESS:
  66         return EACCES;
  67     case CM_ERROR_NOSUCHFILE:
  68         return ENOENT;
  69     case CM_ERROR_INVAL:
  70         return EINVAL;
  71     case CM_ERROR_BADFD:
  72         return EBADF;
  73     case CM_ERROR_EXISTS:
  74         return EEXIST;
  75     case CM_ERROR_CROSSDEVLINK:
  76         return EXDEV;
  77     case CM_ERROR_NOTDIR:
  78         return ENOTDIR;
  79     case CM_ERROR_ISDIR:
  80         return EISDIR;
  81     case CM_ERROR_READONLY:
  82         return EROFS;
  83     case CM_ERROR_WOULDBLOCK:
  84         return EWOULDBLOCK;
  85     case CM_ERROR_NOSUCHCELL:
  86         return ESRCH;           /* hack */
  87     case CM_ERROR_NOSUCHVOLUME:
  88         return EPIPE;           /* hack */
  89     case CM_ERROR_NOMORETOKENS:
  90         return EDOM;            /* hack */
  91     case CM_ERROR_TOOMANYBUFS:
  92         return EFBIG;           /* hack */
  93     default:
  94         return ENOTTY;
  95     }
  96 }
  97
  98 static void
  99 InitFSRequest(fs_ioctlRequest_t * rp)
 100 {
 101     rp->mp = rp->data;
 102     rp->nbytes = 0;
 103 }
 104
 105 static BOOL
 106 IoctlDebug(void)
 107 {
 108     static int init = 0;
 109     static BOOL debug = 0;
 110
 111     if ( !init ) {
 112         HKEY hk;
 113
 114         if (RegOpenKey (HKEY_LOCAL_MACHINE,
 115                          TEXT("Software\\OpenAFS\\Client"), &hk) == 0)
 116         {
 117             DWORD dwSize = sizeof(BOOL);
 118             DWORD dwType = REG_DWORD;
 119             RegQueryValueEx (hk, TEXT("IoctlDebug"), NULL, &dwType, (PBYTE)&debug, &dwSize);
 120             RegCloseKey (hk);
 121         }
 122
 123         init = 1;
 124     }
 125
 126     return debug;
 127 }
 128
 129
 130 // krb5 functions
 131 DECL_FUNC_PTR(krb5_cc_default_name);
 132 DECL_FUNC_PTR(krb5_cc_set_default_name);
 133 DECL_FUNC_PTR(krb5_get_default_config_files);
 134 DECL_FUNC_PTR(krb5_free_config_files);
 135 DECL_FUNC_PTR(krb5_free_context);
 136 DECL_FUNC_PTR(krb5_get_default_realm);
 137 DECL_FUNC_PTR(krb5_free_default_realm);
 138 DECL_FUNC_PTR(krb5_init_context);
 139 DECL_FUNC_PTR(krb5_cc_default);
 140 DECL_FUNC_PTR(krb5_parse_name);
 141 DECL_FUNC_PTR(krb5_free_principal);
 142 DECL_FUNC_PTR(krb5_cc_close);
 143 DECL_FUNC_PTR(krb5_cc_get_principal);
 144 DECL_FUNC_PTR(krb5_build_principal);
 145 DECL_FUNC_PTR(krb5_c_random_make_octets);
 146 DECL_FUNC_PTR(krb5_get_init_creds_password);
 147 DECL_FUNC_PTR(krb5_free_cred_contents);
 148 DECL_FUNC_PTR(krb5_cc_resolve);
 149 DECL_FUNC_PTR(krb5_unparse_name);
 150 DECL_FUNC_PTR(krb5_free_unparsed_name);
 151
 152 FUNC_INFO krb5_fi[] = {
 153     MAKE_FUNC_INFO(krb5_cc_default_name),
 154     MAKE_FUNC_INFO(krb5_cc_set_default_name),
 155     MAKE_FUNC_INFO(krb5_get_default_config_files),
 156     MAKE_FUNC_INFO(krb5_free_config_files),
 157     MAKE_FUNC_INFO(krb5_free_context),
 158     MAKE_FUNC_INFO(krb5_get_default_realm),
 159     MAKE_FUNC_INFO(krb5_free_default_realm),
 160     MAKE_FUNC_INFO(krb5_init_context),
 161     MAKE_FUNC_INFO(krb5_cc_default),
 162     MAKE_FUNC_INFO(krb5_parse_name),
 163     MAKE_FUNC_INFO(krb5_free_principal),
 164     MAKE_FUNC_INFO(krb5_cc_close),
 165     MAKE_FUNC_INFO(krb5_cc_get_principal),
 166     MAKE_FUNC_INFO(krb5_build_principal),
 167     MAKE_FUNC_INFO(krb5_c_random_make_octets),
 168     MAKE_FUNC_INFO(krb5_get_init_creds_password),
 169     MAKE_FUNC_INFO(krb5_free_cred_contents),
 170     MAKE_FUNC_INFO(krb5_cc_resolve),
 171     MAKE_FUNC_INFO(krb5_unparse_name),
 172     MAKE_FUNC_INFO(krb5_free_unparsed_name),
 173     END_FUNC_INFO
 174 };
 175
 176 static int
 177 LoadFuncs(
 178     const char* dll_name,
 179     FUNC_INFO fi[],
 180     HINSTANCE* ph,  // [out, optional] - DLL handle
 181     int* pindex,    // [out, optional] - index of last func loaded (-1 if none)
 182     int cleanup,    // cleanup function pointers and unload on error
 183     int go_on,      // continue loading even if some functions cannot be loaded
 184     int silent      // do not pop-up a system dialog if DLL cannot be loaded
 185     )
 186 {
 187     HINSTANCE h;
 188     int i, n, last_i;
 189     int error = 0;
 190     UINT em;
 191
 192     if (ph) *ph = 0;
 193     if (pindex) *pindex = -1;
 194
 195     for (n = 0; fi[n].func_ptr_var; n++)
 196         *(fi[n].func_ptr_var) = 0;
 197
 198     if (silent)
 199         em = SetErrorMode(SEM_FAILCRITICALERRORS);
 200     h = LoadLibrary(dll_name);
 201     if (silent)
 202         SetErrorMode(em);
 203
 204     if (!h)
 205         return 0;
 206
 207     last_i = -1;
 208     for (i = 0; (go_on || !error) && (i < n); i++)
 209     {
 210         void* p = (void*)GetProcAddress(h, fi[i].func_name);
 211         if (!p)
 212             error = 1;
 213         else
 214         {
 215             last_i = i;
 216             *(fi[i].func_ptr_var) = p;
 217         }
 218     }
 219     if (pindex) *pindex = last_i;
 220     if (error && cleanup && !go_on) {
 221         for (i = 0; i < n; i++) {
 222             *(fi[i].func_ptr_var) = 0;
 223         }
 224         FreeLibrary(h);
 225         return 0;
 226     }
 227     if (ph) *ph = h;
 228     if (error) return 0;
 229     return 1;
 230 }
 231
 232 #define KERB5DLL "krb5_32.dll"
 233 static BOOL
 234 IsKrb5Available()
 235 {
 236     static HINSTANCE hKrb5DLL = 0;
 237
 238     if ( hKrb5DLL )
 239         return TRUE;
 240
 241     hKrb5DLL = LoadLibrary(KERB5DLL);
 242     if (hKrb5DLL) {
 243         if (!LoadFuncs(KERB5DLL, krb5_fi, 0, 0, 1, 0, 0))
 244         {
 245             FreeLibrary(hKrb5DLL);
 246             hKrb5DLL = 0;
 247             return FALSE;
 248         }
 249     }
 250     return TRUE;
 251 }
 252
 253 static BOOL
 254 GetLSAPrincipalName(char * szUser, DWORD *dwSize)
 255 {
 256     krb5_context   ctx = 0;
 257     krb5_error_code code;
 258     krb5_ccache mslsa_ccache=0;
 259     krb5_principal princ = 0;
 260     char * pname = 0;
 261     BOOL success = 0;
 262
 263     if (!IsKrb5Available())
 264         return FALSE;
 265
 266     if (code = pkrb5_init_context(&ctx))
 267         goto cleanup;
 268
 269     if (code = pkrb5_cc_resolve(ctx, "MSLSA:", &mslsa_ccache))
 270         goto cleanup;
 271
 272     if (code = pkrb5_cc_get_principal(ctx, mslsa_ccache, &princ))
 273         goto cleanup;
 274
 275     if (code = pkrb5_unparse_name(ctx, princ, &pname))
 276         goto cleanup;
 277
 278     if ( strlen(pname) < *dwSize ) {
 279         strncpy(szUser, pname, *dwSize);
 280         szUser[*dwSize-1] = '\0';
 281         success = 1;
 282     }
 283     *dwSize = strlen(pname);
 284
 285   cleanup:
 286     if (pname)
 287         pkrb5_free_unparsed_name(ctx, pname);
 288
 289     if (princ)
 290         pkrb5_free_principal(ctx, princ);
 291
 292     if (mslsa_ccache)
 293         pkrb5_cc_close(ctx, mslsa_ccache);
 294
 295     if (ctx)
 296         pkrb5_free_context(ctx);
 297     return success;
 298 }
 299
 300 static long
 301 GetIoctlHandle(char *fileNamep, HANDLE * handlep)
 302 {
 303     char *drivep;
 304     char netbiosName[MAX_NB_NAME_LENGTH];
 305     char tbuffer[256]="";
 306     HANDLE fh;
 307     HKEY hk;
 308     char szUser[128] = "";
 309     char szClient[MAX_PATH] = "";
 310     char szPath[MAX_PATH] = "";
 311     NETRESOURCE nr;
 312     DWORD res;
 313     DWORD ioctlDebug = IoctlDebug();
 314     DWORD gle;
 315     DWORD dwSize = sizeof(szUser);
 316
 317     if (fileNamep) {
 318         drivep = strchr(fileNamep, ':');
 319         if (drivep && (drivep - fileNamep) >= 1) {
 320             tbuffer[0] = *(drivep - 1);
 321             tbuffer[1] = ':';
 322             strcpy(tbuffer + 2, SMB_IOCTL_FILENAME);
 323         } else if (fileNamep[0] == fileNamep[1] &&
 324                                fileNamep[0] == '\\')
 325         {
 326             int count = 0, i = 0;
 327
 328             while (count < 4 && fileNamep[i]) {
 329                 tbuffer[i] = fileNamep[i];
 330                 if ( tbuffer[i++] == '\\' )
 331                     count++;
 332             }
 333             if (fileNamep[i] == 0)
 334                 tbuffer[i++] = '\\';
 335             tbuffer[i] = 0;
 336             strcat(tbuffer, SMB_IOCTL_FILENAME);
 337         } else {
 338             char curdir[256]="";
 339
 340             GetCurrentDirectory(sizeof(curdir), curdir);
 341             if ( curdir[1] == ':' ) {
 342                 tbuffer[0] = curdir[0];
 343                 tbuffer[1] = ':';
 344                 strcpy(tbuffer + 2, SMB_IOCTL_FILENAME);
 345             } else if (curdir[0] == curdir[1] &&
 346                        curdir[0] == '\\')
 347             {
 348                 int count = 0, i = 0;
 349
 350                 while (count < 4 && curdir[i]) {
 351                     tbuffer[i] = curdir[i];
 352                     if ( tbuffer[i++] == '\\' )
 353                         count++;
 354                 }
 355                 if (tbuffer[i] == 0)
 356                     tbuffer[i++] = '\\';
 357                 tbuffer[i] = 0;
 358                 strcat(tbuffer, SMB_IOCTL_FILENAME_NOSLASH);
 359             }
 360         }
 361     }
 362     if (!tbuffer[0]) {
 363         /* No file name starting with drive colon specified, use UNC name */
 364         lana_GetNetbiosName(netbiosName,LANA_NETBIOS_NAME_FULL);
 365         sprintf(tbuffer,"\\\\%s\\all%s",netbiosName,SMB_IOCTL_FILENAME);
 366     }
 367
 368     fflush(stdout);
 369     /* now open the file */
 370     fh = CreateFile(tbuffer, GENERIC_READ | GENERIC_WRITE,
 371                     FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
 372                     FILE_FLAG_WRITE_THROUGH, NULL);
 373     fflush(stdout);
 374     if (fh == INVALID_HANDLE_VALUE) {
 375         int  gonext = 0;
 376
 377         gle = GetLastError();
 378         if (gle && ioctlDebug ) {
 379             char buf[4096];
 380
 381             if ( FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
 382                                NULL,
 383                                gle,
 384                                MAKELANGID(LANG_ENGLISH,SUBLANG_ENGLISH_US),
 385                                buf,
 386                                4096,
 387                                (va_list *) NULL
 388                                ) )
 389             {
 390                 fprintf(stderr,"pioctl CreateFile(%s) failed: 0x%X\r\n\t[%s]\r\n",
 391                         tbuffer,gle,buf);
 392             }
 393         }
 394
 395         lana_GetNetbiosName(szClient, LANA_NETBIOS_NAME_FULL);
 396
 397         if (RegOpenKey (HKEY_CURRENT_USER,
 398                          TEXT("Software\\Microsoft\\Windows\\CurrentVersion\\Explorer"), &hk) == 0)
 399         {
 400             DWORD dwType = REG_SZ;
 401             RegQueryValueEx (hk, TEXT("Logon User Name"), NULL, &dwType, (PBYTE)szUser, &dwSize);
 402             RegCloseKey (hk);
 403         }
 404
 405         if ( szUser[0] ) {
 406             if ( ioctlDebug )
 407                 fprintf(stderr, "pioctl Explorer logon user: [%s]\r\n",szUser);
 408
 409             sprintf(szPath, "\\\\%s", szClient);
 410             memset (&nr, 0x00, sizeof(NETRESOURCE));
 411             nr.dwType=RESOURCETYPE_DISK;
 412             nr.lpLocalName=0;
 413             nr.lpRemoteName=szPath;
 414             res = WNetAddConnection2(&nr,NULL,szUser,0);
 415             if (res) {
 416                 if ( ioctlDebug ) {
 417                     fprintf(stderr, "pioctl WNetAddConnection2(%s,%s) failed: 0x%X\r\n",
 418                              szPath,szUser,res);
 419                 }
 420                 gonext = 1;
 421             }
 422
 423             sprintf(szPath, "\\\\%s\\all", szClient);
 424             res = WNetAddConnection2(&nr,NULL,szUser,0);
 425             if (res) {
 426                 if ( ioctlDebug ) {
 427                     fprintf(stderr, "pioctl WNetAddConnection2(%s,%s) failed: 0x%X\r\n",
 428                              szPath,szUser,res);
 429                 }
 430                 gonext = 1;
 431             }
 432
 433             if (gonext)
 434                 goto try_lsa_principal;
 435
 436             fh = CreateFile(tbuffer, GENERIC_READ | GENERIC_WRITE,
 437                              FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
 438                              FILE_FLAG_WRITE_THROUGH, NULL);
 439             fflush(stdout);
 440             if (fh == INVALID_HANDLE_VALUE) {
 441                 gle = GetLastError();
 442                 if (gle && ioctlDebug ) {
 443                     char buf[4096];
 444
 445                     if ( FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
 446                                         NULL,
 447                                         gle,
 448                                         MAKELANGID(LANG_ENGLISH,SUBLANG_ENGLISH_US),
 449                                         buf,
 450                                         4096,
 451                                         (va_list *) NULL
 452                                         ) )
 453                     {
 454                         fprintf(stderr,"pioctl CreateFile(%s) failed: 0x%X\r\n\t[%s]\r\n",
 455                                  tbuffer,gle,buf);
 456                     }
 457                 }
 458             }
 459         }
 460     }
 461
 462   try_lsa_principal:
 463     if (fh == INVALID_HANDLE_VALUE) {
 464         int  gonext = 0;
 465
 466         dwSize = sizeof(szUser);
 467         if (GetLSAPrincipalName(szUser, &dwSize)) {
 468             if ( ioctlDebug )
 469                 fprintf(stderr, "pioctl LSA Principal logon user: [%s]\r\n",szUser);
 470
 471             sprintf(szPath, "\\\\%s", szClient);
 472             memset (&nr, 0x00, sizeof(NETRESOURCE));
 473             nr.dwType=RESOURCETYPE_DISK;
 474             nr.lpLocalName=0;
 475             nr.lpRemoteName=szPath;
 476             res = WNetAddConnection2(&nr,NULL,szUser,0);
 477             if (res) {
 478                 if ( ioctlDebug ) {
 479                     fprintf(stderr, "pioctl WNetAddConnection2(%s,%s) failed: 0x%X\r\n",
 480                              szPath,szUser,res);
 481                 }
 482                 gonext = 1;
 483             }
 484
 485             sprintf(szPath, "\\\\%s\\all", szClient);
 486             res = WNetAddConnection2(&nr,NULL,szUser,0);
 487             if (res) {
 488                 if ( ioctlDebug ) {
 489                     fprintf(stderr, "pioctl WNetAddConnection2(%s,%s) failed: 0x%X\r\n",
 490                              szPath,szUser,res);
 491                 }
 492                 gonext = 1;
 493             }
 494
 495             if (gonext)
 496                 goto try_sam_compat;
 497
 498             fh = CreateFile(tbuffer, GENERIC_READ | GENERIC_WRITE,
 499                              FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
 500                              FILE_FLAG_WRITE_THROUGH, NULL);
 501             fflush(stdout);
 502             if (fh == INVALID_HANDLE_VALUE) {
 503                 gle = GetLastError();
 504                 if (gle && ioctlDebug ) {
 505                     char buf[4096];
 506
 507                     if ( FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
 508                                         NULL,
 509                                         gle,
 510                                         MAKELANGID(LANG_ENGLISH,SUBLANG_ENGLISH_US),
 511                                         buf,
 512                                         4096,
 513                                         (va_list *) NULL
 514                                         ) )
 515                     {
 516                         fprintf(stderr,"pioctl CreateFile(%s) failed: 0x%X\r\n\t[%s]\r\n",
 517                                  tbuffer,gle,buf);
 518                     }
 519                 }
 520             }
 521         }
 522     }
 523
 524   try_sam_compat:
 525     if ( fh == INVALID_HANDLE_VALUE ) {
 526         dwSize = sizeof(szUser);
 527         if (GetUserNameEx(NameSamCompatible, szUser, &dwSize)) {
 528             if ( ioctlDebug )
 529                 fprintf(stderr, "pioctl SamCompatible logon user: [%s]\r\n",szUser);
 530
 531             sprintf(szPath, "\\\\%s", szClient);
 532             memset (&nr, 0x00, sizeof(NETRESOURCE));
 533             nr.dwType=RESOURCETYPE_DISK;
 534             nr.lpLocalName=0;
 535             nr.lpRemoteName=szPath;
 536             res = WNetAddConnection2(&nr,NULL,szUser,0);
 537             if (res) {
 538                 if ( ioctlDebug ) {
 539                     fprintf(stderr, "pioctl WNetAddConnection2(%s,%s) failed: 0x%X\r\n",
 540                              szPath,szUser,res);
 541                 }
 542             }
 543
 544             sprintf(szPath, "\\\\%s\\all", szClient);
 545             res = WNetAddConnection2(&nr,NULL,szUser,0);
 546             if (res) {
 547                 if ( ioctlDebug ) {
 548                     fprintf(stderr, "pioctl WNetAddConnection2(%s,%s) failed: 0x%X\r\n",
 549                              szPath,szUser,res);
 550                 }
 551                 return -1;
 552             }
 553
 554             fh = CreateFile(tbuffer, GENERIC_READ | GENERIC_WRITE,
 555                              FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
 556                              FILE_FLAG_WRITE_THROUGH, NULL);
 557             fflush(stdout);
 558             if (fh == INVALID_HANDLE_VALUE) {
 559                 gle = GetLastError();
 560                 if (gle && ioctlDebug ) {
 561                     char buf[4096];
 562
 563                     if ( FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
 564                                         NULL,
 565                                         gle,
 566                                         MAKELANGID(LANG_ENGLISH,SUBLANG_ENGLISH_US),
 567                                         buf,
 568                                         4096,
 569                                         (va_list *) NULL
 570                                         ) )
 571                     {
 572                         fprintf(stderr,"pioctl CreateFile(%s) failed: 0x%X\r\n\t[%s]\r\n",
 573                                  tbuffer,gle,buf);
 574                     }
 575                 }
 576                 return -1;
 577             }
 578         } else {
 579             fprintf(stderr, "GetUserNameEx(NameSamCompatible) failed: 0x%X\r\n", GetLastError());
 580             return -1;
 581         }
 582     }
 583
 584     /* return fh and success code */
 585     *handlep = fh;
 586     return 0;
 587 }
 588
 589 static long
 590 Transceive(HANDLE handle, fs_ioctlRequest_t * reqp)
 591 {
 592     long rcount;
 593     long ioCount;
 594     DWORD gle;
 595
 596     rcount = reqp->mp - reqp->data;
 597     if (rcount <= 0) {
 598         if ( IoctlDebug() )
 599             fprintf(stderr, "pioctl Transceive rcount <= 0: %d\r\n",rcount);
 600         return EINVAL;          /* not supposed to happen */
 601     }
 602
 603     if (!WriteFile(handle, reqp->data, rcount, &ioCount, NULL)) {
 604         /* failed to write */
 605         gle = GetLastError();
 606
 607         if ( IoctlDebug() )
 608             fprintf(stderr, "pioctl Transceive WriteFile failed: 0x%X\r\n",gle);
 609         return gle;
 610     }
 611
 612     if (!ReadFile(handle, reqp->data, sizeof(reqp->data), &ioCount, NULL)) {
 613         /* failed to read */
 614         gle = GetLastError();
 615
 616         if ( IoctlDebug() )
 617             fprintf(stderr, "pioctl Transceive ReadFile failed: 0x%X\r\n",gle);
 618         return gle;
 619     }
 620
 621     reqp->nbytes = ioCount;     /* set # of bytes available */
 622     reqp->mp = reqp->data;      /* restart marshalling */
 623
 624     /* return success */
 625     return 0;
 626 }
 627
 628 static long
 629 MarshallLong(fs_ioctlRequest_t * reqp, long val)
 630 {
 631     memcpy(reqp->mp, &val, 4);
 632     reqp->mp += 4;
 633     return 0;
 634 }
 635
 636 static long
 637 UnmarshallLong(fs_ioctlRequest_t * reqp, long *valp)
 638 {
 639     /* not enough data left */
 640     if (reqp->nbytes < 4) {
 641         if ( IoctlDebug() )
 642             fprintf(stderr, "pioctl UnmarshallLong reqp->nbytes < 4: %d\r\n",
 643                      reqp->nbytes);
 644         return -1;
 645     }
 646
 647     memcpy(valp, reqp->mp, 4);
 648     reqp->mp += 4;
 649     reqp->nbytes -= 4;
 650     return 0;
 651 }
 652
 653 /* includes marshalling NULL pointer as a null (0 length) string */
 654 static long
 655 MarshallString(fs_ioctlRequest_t * reqp, char *stringp)
 656 {
 657     int count;
 658
 659     if (stringp)
 660         count = strlen(stringp) + 1;    /* space required including null */
 661     else
 662         count = 1;
 663
 664     /* watch for buffer overflow */
 665     if ((reqp->mp - reqp->data) + count > sizeof(reqp->data)) {
 666         if ( IoctlDebug() )
 667             fprintf(stderr, "pioctl MarshallString buffer overflow\r\n");
 668         return -1;
 669     }
 670
 671     if (stringp)
 672         memcpy(reqp->mp, stringp, count);
 673     else
 674         *(reqp->mp) = 0;
 675     reqp->mp += count;
 676     return 0;
 677 }
 678
 679 /* take a path with a drive letter, possibly relative, and return a full path
 680  * without the drive letter.  This is the full path relative to the working
 681  * dir for that drive letter.  The input and output paths can be the same.
 682  */
 683 static long
 684 fs_GetFullPath(char *pathp, char *outPathp, long outSize)
 685 {
 686     char tpath[1000];
 687     char origPath[1000];
 688     char *firstp;
 689     long code;
 690     int pathHasDrive;
 691     int doSwitch;
 692     char newPath[3];
 693
 694     if (pathp[0] != 0 && pathp[1] == ':') {
 695         /* there's a drive letter there */
 696         firstp = pathp + 2;
 697         pathHasDrive = 1;
 698     } else {
 699         firstp = pathp;
 700         pathHasDrive = 0;
 701     }
 702
 703     if ( firstp[0] == '\\' && firstp[1] == '\\') {
 704         /* UNC path - strip off the server and sharename */
 705         int i, count;
 706         for ( i=2,count=2; count < 4 && firstp[i]; i++ ) {
 707             if ( firstp[i] == '\\' || firstp[i] == '/' ) {
 708                 count++;
 709             }
 710         }
 711         if ( firstp[i] == 0 ) {
 712             strcpy(outPathp,"\\");
 713         } else {
 714             strcpy(outPathp,&firstp[--i]);
 715         }
 716         return 0;
 717     } else if (firstp[0] == '\\' || firstp[0] == '/') {
 718         /* already an absolute pathname, just copy it back */
 719         strcpy(outPathp, firstp);
 720         return 0;
 721     }
 722
 723     GetCurrentDirectory(sizeof(origPath), origPath);
 724
 725     doSwitch = 0;
 726     if (pathHasDrive && (*pathp & ~0x20) != (origPath[0] & ~0x20)) {
 727         /* a drive has been specified and it isn't our current drive.
 728          * to get path, switch to it first.  Must case-fold drive letters
 729          * for user convenience.
 730          */
 731         doSwitch = 1;
 732         newPath[0] = *pathp;
 733         newPath[1] = ':';
 734         newPath[2] = 0;
 735         if (!SetCurrentDirectory(newPath)) {
 736             code = GetLastError();
 737
 738             if ( IoctlDebug() )
 739                 fprintf(stderr, "pioctl fs_GetFullPath SetCurrentDirectory(%s) failed: 0x%X\r\n",
 740                          newPath, code);
 741             return code;
 742         }
 743     }
 744
 745     /* now get the absolute path to the current wdir in this drive */
 746     GetCurrentDirectory(sizeof(tpath), tpath);
 747     if (tpath[1] == ':')
 748         strcpy(outPathp, tpath + 2);    /* skip drive letter */
 749     else if ( tpath[0] == '\\' && tpath[1] == '\\') {
 750         /* UNC path - strip off the server and sharename */
 751         int i, count;
 752         for ( i=2,count=2; count < 4 && tpath[i]; i++ ) {
 753             if ( tpath[i] == '\\' || tpath[i] == '/' ) {
 754                 count++;
 755             }
 756         }
 757         if ( tpath[i] == 0 ) {
 758             strcpy(outPathp,"\\");
 759         } else {
 760             strcpy(outPathp,&tpath[--i]);
 761         }
 762     } else {
 763         /* this should never happen */
 764         strcpy(outPathp, tpath);
 765     }
 766
 767     /* if there is a non-null name after the drive, append it */
 768     if (*firstp != 0) {
 769         int len = strlen(outPathp);
 770         if (outPathp[len-1] != '\\' && outPathp[len-1] != '/')
 771             strcat(outPathp, "\\");
 772         strcat(outPathp, firstp);
 773     }
 774
 775     /* finally, if necessary, switch back to our home drive letter */
 776     if (doSwitch) {
 777         SetCurrentDirectory(origPath);
 778     }
 779
 780     return 0;
 781 }
 782
 783 long
 784 pioctl(char *pathp, long opcode, struct ViceIoctl *blobp, int follow)
 785 {
 786     fs_ioctlRequest_t preq;
 787     long code;
 788     long temp;
 789     char fullPath[1000];
 790     HANDLE reqHandle;
 791
 792     code = GetIoctlHandle(pathp, &reqHandle);
 793     if (code) {
 794         if (pathp)
 795             errno = EINVAL;
 796         else
 797             errno = ENODEV;
 798         return code;
 799     }
 800
 801     /* init the request structure */
 802     InitFSRequest(&preq);
 803
 804     /* marshall the opcode, the path name and the input parameters */
 805     MarshallLong(&preq, opcode);
 806     /* when marshalling the path, remove the drive letter, since we already
 807      * used the drive letter to find the AFS daemon; we don't need it any more.
 808      * Eventually we'll expand relative path names here, too, since again, only
 809      * we understand those.
 810      */
 811     if (pathp) {
 812         code = fs_GetFullPath(pathp, fullPath, sizeof(fullPath));
 813         if (code) {
 814             CloseHandle(reqHandle);
 815             errno = EINVAL;
 816             return code;
 817         }
 818     } else {
 819         strcpy(fullPath, "");
 820     }
 821
 822     MarshallString(&preq, fullPath);
 823     if (blobp->in_size) {
 824         memcpy(preq.mp, blobp->in, blobp->in_size);
 825         preq.mp += blobp->in_size;
 826     }
 827
 828     /* now make the call */
 829     code = Transceive(reqHandle, &preq);
 830     if (code) {
 831         CloseHandle(reqHandle);
 832         return code;
 833     }
 834
 835     /* now unmarshall the return value */
 836     if (UnmarshallLong(&preq, &temp) != 0) {
 837         CloseHandle(reqHandle);
 838         return -1;
 839     }
 840
 841     if (temp != 0) {
 842         CloseHandle(reqHandle);
 843         errno = CMtoUNIXerror(temp);
 844         if ( IoctlDebug() )
 845             fprintf(stderr, "pioctl temp != 0: 0x%X\r\n",temp);
 846         return -1;
 847     }
 848
 849     /* otherwise, unmarshall the output parameters */
 850     if (blobp->out_size) {
 851         temp = blobp->out_size;
 852         if (preq.nbytes < temp)
 853             temp = preq.nbytes;
 854         memcpy(blobp->out, preq.mp, temp);
 855         blobp->out_size = temp;
 856     }
 857
 858     /* and return success */
 859     CloseHandle(reqHandle);
 860     return 0;
 861 }