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 /*{ "tdb", mangle_tdb_init }, */ 33 { NULL, NULL } 34}; 35 36/* 37 initialise the mangling subsystem 38*/ 39static void mangle_init(void) 40{ 41 int i; 42 char *method; 43 44 if (mangle_fns) 45 return; 46 47 method = lp_mangling_method(); 48 49 /* find the first mangling method that manages to initialise and 50 matches the "mangling method" parameter */ 51 for (i=0; mangle_backends[i].name && !mangle_fns; i++) { 52 if (!method || !*method || strcmp(method, mangle_backends[i].name) == 0) { 53 mangle_fns = mangle_backends[i].init_fn(); 54 } 55 } 56 57 if (!mangle_fns) { 58 DEBUG(0,("Failed to initialise mangling system '%s'\n", method)); 59 exit_server("mangling init failed"); 60 } 61} 62 63 64/* 65 reset the cache. This is called when smb.conf has been reloaded 66*/ 67void mangle_reset_cache(void) 68{ 69 mangle_init(); 70 71 mangle_fns->reset(); 72} 73 74/* 75 see if a filename has come out of our mangling code 76*/ 77BOOL mangle_is_mangled(const char *s) 78{ 79 return mangle_fns->is_mangled(s); 80} 81 82/* 83 see if a filename matches the rules of a 8.3 filename 84*/ 85BOOL mangle_is_8_3(const char *fname, BOOL check_case) 86{ 87 return mangle_fns->is_8_3(fname, check_case, False); 88} 89 90BOOL mangle_is_8_3_wildcards(const char *fname, BOOL check_case) 91{ 92 return mangle_fns->is_8_3(fname, check_case, True); 93} 94 95/* 96 try to reverse map a 8.3 name to the original filename. This doesn't have to 97 always succeed, as the directory handling code in smbd will scan the directory 98 looking for a matching name if it doesn't. It should succeed most of the time 99 or there will be a huge performance penalty 100*/ 101BOOL mangle_check_cache(char *s, size_t maxlen) 102{ 103 return mangle_fns->check_cache(s, maxlen); 104} 105 106/* 107 map a long filename to a 8.3 name. 108 */ 109 110void mangle_map(pstring OutName, BOOL need83, BOOL cache83, int snum) 111{ 112 /* name mangling can be disabled for speed, in which case 113 we just truncate the string */ 114 if (!lp_manglednames(snum)) { 115 if (need83) { 116 string_truncate(OutName, 12); 117 } 118 return; 119 } 120 121 /* invoke the inane "mangled map" code */ 122 mangle_map_filename(OutName, snum); 123 mangle_fns->name_map(OutName, need83, cache83, lp_defaultcase(snum)); 124} 125