1/* 2 Unix SMB/CIFS implementation. 3 Name mangling interface 4 Copyright (C) Andrew Tridgell 2002 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 19*/ 20 21#include "includes.h" 22 23static struct mangle_fns *mangle_fns; 24 25/* this allows us to add more mangling backends */ 26static const struct { 27 const char *name; 28 struct mangle_fns *(*init_fn)(void); 29} mangle_backends[] = { 30 { "hash", mangle_hash_init }, 31 { "hash2", mangle_hash2_init }, 32 { "posix", posix_mangle_init }, 33 /*{ "tdb", mangle_tdb_init }, */ 34 { NULL, NULL } 35}; 36 37/* 38 initialise the mangling subsystem 39*/ 40static void mangle_init(void) 41{ 42 int i; 43 const char *method; 44 45 if (mangle_fns) 46 return; 47 48 method = lp_mangling_method(); 49 50 /* find the first mangling method that manages to initialise and 51 matches the "mangling method" parameter */ 52 for (i=0; mangle_backends[i].name && !mangle_fns; i++) { 53 if (!method || !*method || strcmp(method, mangle_backends[i].name) == 0) { 54 mangle_fns = mangle_backends[i].init_fn(); 55 } 56 } 57 58 if (!mangle_fns) { 59 DEBUG(0,("Failed to initialise mangling system '%s'\n", method)); 60 exit_server("mangling init failed"); 61 } 62} 63 64 65/* 66 reset the cache. This is called when smb.conf has been reloaded 67*/ 68void mangle_reset_cache(void) 69{ 70 mangle_init(); 71 mangle_fns->reset(); 72} 73 74void mangle_change_to_posix(void) 75{ 76 mangle_fns = NULL; 77 lp_set_mangling_method("posix"); 78 mangle_reset_cache(); 79} 80 81/* 82 see if a filename has come out of our mangling code 83*/ 84BOOL mangle_is_mangled(const char *s, const struct share_params *p) 85{ 86 return mangle_fns->is_mangled(s, p); 87} 88 89/* 90 see if a filename matches the rules of a 8.3 filename 91*/ 92BOOL mangle_is_8_3(const char *fname, BOOL check_case, 93 const struct share_params *p) 94{ 95 return mangle_fns->is_8_3(fname, check_case, False, p); 96} 97 98BOOL mangle_is_8_3_wildcards(const char *fname, BOOL check_case, 99 const struct share_params *p) 100{ 101 return mangle_fns->is_8_3(fname, check_case, True, p); 102} 103 104/* 105 try to reverse map a 8.3 name to the original filename. This doesn't have to 106 always succeed, as the directory handling code in smbd will scan the directory 107 looking for a matching name if it doesn't. It should succeed most of the time 108 or there will be a huge performance penalty 109*/ 110BOOL mangle_check_cache(char *s, size_t maxlen, 111 const struct share_params *p) 112{ 113 return mangle_fns->check_cache(s, maxlen, p); 114} 115 116/* 117 map a long filename to a 8.3 name. 118 */ 119 120void mangle_map(pstring OutName, BOOL need83, BOOL cache83, 121 const struct share_params *p) 122{ 123 /* name mangling can be disabled for speed, in which case 124 we just truncate the string */ 125 if (!lp_manglednames(p)) { 126 if (need83) { 127 string_truncate(OutName, 12); 128 } 129 return; 130 } 131 132 /* invoke the inane "mangled map" code */ 133 mangle_map_filename(OutName, p); 134 mangle_fns->name_map(OutName, need83, cache83, lp_defaultcase(p->service), p); 135} 136