| 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 |
|
|---|
| 22 | static struct mangle_fns *mangle_fns;
|
|---|
| 23 |
|
|---|
| 24 | /* this allows us to add more mangling backends */
|
|---|
| 25 | static const struct {
|
|---|
| 26 | const char *name;
|
|---|
| 27 | struct mangle_fns *(*init_fn)(void);
|
|---|
| 28 | } mangle_backends[] = {
|
|---|
| 29 | { "hash", mangle_hash_init },
|
|---|
| 30 | { "hash2", mangle_hash2_init },
|
|---|
| 31 | { "posix", posix_mangle_init },
|
|---|
| 32 | /*{ "tdb", mangle_tdb_init }, */
|
|---|
| 33 | { NULL, NULL }
|
|---|
| 34 | };
|
|---|
| 35 |
|
|---|
| 36 | /*
|
|---|
| 37 | initialise the mangling subsystem
|
|---|
| 38 | */
|
|---|
| 39 | static void mangle_init(void)
|
|---|
| 40 | {
|
|---|
| 41 | int i;
|
|---|
| 42 | const 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 | */
|
|---|
| 67 | void mangle_reset_cache(void)
|
|---|
| 68 | {
|
|---|
| 69 | mangle_init();
|
|---|
| 70 | mangle_fns->reset();
|
|---|
| 71 | }
|
|---|
| 72 |
|
|---|
| 73 | void mangle_change_to_posix(void)
|
|---|
| 74 | {
|
|---|
| 75 | mangle_fns = NULL;
|
|---|
| 76 | lp_set_mangling_method("posix");
|
|---|
| 77 | mangle_reset_cache();
|
|---|
| 78 | }
|
|---|
| 79 |
|
|---|
| 80 | /*
|
|---|
| 81 | see if a filename has come out of our mangling code
|
|---|
| 82 | */
|
|---|
| 83 | bool mangle_is_mangled(const char *s, const struct share_params *p)
|
|---|
| 84 | {
|
|---|
| 85 | return mangle_fns->is_mangled(s, p);
|
|---|
| 86 | }
|
|---|
| 87 |
|
|---|
| 88 | /*
|
|---|
| 89 | see if a filename matches the rules of a 8.3 filename
|
|---|
| 90 | */
|
|---|
| 91 | bool mangle_is_8_3(const char *fname, bool check_case,
|
|---|
| 92 | const struct share_params *p)
|
|---|
| 93 | {
|
|---|
| 94 | return mangle_fns->is_8_3(fname, check_case, False, p);
|
|---|
| 95 | }
|
|---|
| 96 |
|
|---|
| 97 | bool mangle_is_8_3_wildcards(const char *fname, bool check_case,
|
|---|
| 98 | const struct share_params *p)
|
|---|
| 99 | {
|
|---|
| 100 | return mangle_fns->is_8_3(fname, check_case, True, p);
|
|---|
| 101 | }
|
|---|
| 102 |
|
|---|
| 103 | bool mangle_must_mangle(const char *fname,
|
|---|
| 104 | const struct share_params *p)
|
|---|
| 105 | {
|
|---|
| 106 | if (!lp_manglednames(p)) {
|
|---|
| 107 | return False;
|
|---|
| 108 | }
|
|---|
| 109 | return mangle_fns->must_mangle(fname, p);
|
|---|
| 110 | }
|
|---|
| 111 |
|
|---|
| 112 | /*
|
|---|
| 113 | try to reverse map a 8.3 name to the original filename. This doesn't have to
|
|---|
| 114 | always succeed, as the directory handling code in smbd will scan the directory
|
|---|
| 115 | looking for a matching name if it doesn't. It should succeed most of the time
|
|---|
| 116 | or there will be a huge performance penalty
|
|---|
| 117 | */
|
|---|
| 118 | bool mangle_lookup_name_from_8_3(TALLOC_CTX *ctx,
|
|---|
| 119 | const char *in,
|
|---|
| 120 | char **out, /* talloced on the given context. */
|
|---|
| 121 | const struct share_params *p)
|
|---|
| 122 | {
|
|---|
| 123 | return mangle_fns->lookup_name_from_8_3(ctx, in, out, p);
|
|---|
| 124 | }
|
|---|
| 125 |
|
|---|
| 126 | /*
|
|---|
| 127 | mangle a long filename to a 8.3 name.
|
|---|
| 128 | Return True if we did mangle the name (ie. out is filled in).
|
|---|
| 129 | False on error.
|
|---|
| 130 | JRA.
|
|---|
| 131 | */
|
|---|
| 132 |
|
|---|
| 133 | bool name_to_8_3(const char *in,
|
|---|
| 134 | char out[13],
|
|---|
| 135 | bool cache83,
|
|---|
| 136 | const struct share_params *p)
|
|---|
| 137 | {
|
|---|
| 138 | memset(out,'\0',13);
|
|---|
| 139 |
|
|---|
| 140 | /* name mangling can be disabled for speed, in which case
|
|---|
| 141 | we just truncate the string */
|
|---|
| 142 | if (!lp_manglednames(p)) {
|
|---|
| 143 | strlcpy(out, in, 13);
|
|---|
| 144 | return True;
|
|---|
| 145 | }
|
|---|
| 146 |
|
|---|
| 147 | return mangle_fns->name_to_8_3(in,
|
|---|
| 148 | out,
|
|---|
| 149 | cache83,
|
|---|
| 150 | lp_defaultcase(p->service),
|
|---|
| 151 | p);
|
|---|
| 152 | }
|
|---|
