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 3 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, see <http://www.gnu.org/licenses/>. 18*/ 19 20#include "includes.h" 21#include "smbd/globals.h" 22 23/* this allows us to add more mangling backends */ 24static const struct { 25 const char *name; 26 const struct mangle_fns *(*init_fn)(void); 27} mangle_backends[] = { 28 { "hash", mangle_hash_init }, 29 { "hash2", mangle_hash2_init }, 30 { "posix", posix_mangle_init }, 31 /*{ "tdb", mangle_tdb_init }, */ 32 { NULL, NULL } 33}; 34 35/* 36 initialise the mangling subsystem 37*/ 38static void mangle_init(void) 39{ 40 int i; 41 const char *method; 42 43 if (mangle_fns) 44 return; 45 46 method = lp_mangling_method(); 47 48 /* find the first mangling method that manages to initialise and 49 matches the "mangling method" parameter */ 50 for (i=0; mangle_backends[i].name && !mangle_fns; i++) { 51 if (!method || !*method || strcmp(method, mangle_backends[i].name) == 0) { 52 mangle_fns = mangle_backends[i].init_fn(); 53 } 54 } 55 56 if (!mangle_fns) { 57 DEBUG(0,("Failed to initialise mangling system '%s'\n", method)); 58 exit_server("mangling init failed"); 59 } 60} 61 62 63/* 64 reset the cache. This is called when smb.conf has been reloaded 65*/ 66void mangle_reset_cache(void) 67{ 68 mangle_init(); 69 mangle_fns->reset(); 70} 71 72void mangle_change_to_posix(void) 73{ 74 mangle_fns = NULL; 75 lp_set_mangling_method("posix"); 76 mangle_reset_cache(); 77} 78 79/* 80 see if a filename has come out of our mangling code 81*/ 82bool mangle_is_mangled(const char *s, const struct share_params *p) 83{ 84 return mangle_fns->is_mangled(s, p); 85} 86 87/* 88 see if a filename matches the rules of a 8.3 filename 89*/ 90bool mangle_is_8_3(const char *fname, bool check_case, 91 const struct share_params *p) 92{ 93 return mangle_fns->is_8_3(fname, check_case, False, p); 94} 95 96bool mangle_is_8_3_wildcards(const char *fname, bool check_case, 97 const struct share_params *p) 98{ 99 return mangle_fns->is_8_3(fname, check_case, True, p); 100} 101 102bool mangle_must_mangle(const char *fname, 103 const struct share_params *p) 104{ 105 if (!lp_manglednames(p)) { 106 return False; 107 } 108 return mangle_fns->must_mangle(fname, p); 109} 110 111/* 112 try to reverse map a 8.3 name to the original filename. This doesn't have to 113 always succeed, as the directory handling code in smbd will scan the directory 114 looking for a matching name if it doesn't. It should succeed most of the time 115 or there will be a huge performance penalty 116*/ 117bool mangle_lookup_name_from_8_3(TALLOC_CTX *ctx, 118 const char *in, 119 char **out, /* talloced on the given context. */ 120 const struct share_params *p) 121{ 122 return mangle_fns->lookup_name_from_8_3(ctx, in, out, p); 123} 124 125/* 126 mangle a long filename to a 8.3 name. 127 Return True if we did mangle the name (ie. out is filled in). 128 False on error. 129 JRA. 130 */ 131 132bool name_to_8_3(const char *in, 133 char out[13], 134 bool cache83, 135 const struct share_params *p) 136{ 137 memset(out,'\0',13); 138 139 /* name mangling can be disabled for speed, in which case 140 we just truncate the string */ 141 if (!lp_manglednames(p)) { 142 strlcpy(out, in, 13); 143 return True; 144 } 145 146 return mangle_fns->name_to_8_3(in, 147 out, 148 cache83, 149 lp_defaultcase(p->service), 150 p); 151} 152