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-rw-r--r--source3/smbd/mangle.c153
1 files changed, 153 insertions, 0 deletions
diff --git a/source3/smbd/mangle.c b/source3/smbd/mangle.c
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+++ b/source3/smbd/mangle.c
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+/*
+ Unix SMB/CIFS implementation.
+ Name mangling interface
+ Copyright (C) Andrew Tridgell 2002
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "smbd/smbd.h"
+#include "smbd/globals.h"
+#include "mangle.h"
+
+/* this allows us to add more mangling backends */
+static const struct {
+ const char *name;
+ const struct mangle_fns *(*init_fn)(void);
+} mangle_backends[] = {
+ { "hash", mangle_hash_init },
+ { "hash2", mangle_hash2_init },
+ { "posix", posix_mangle_init },
+ /*{ "tdb", mangle_tdb_init }, */
+ { NULL, NULL }
+};
+
+/*
+ initialise the mangling subsystem
+*/
+static void mangle_init(void)
+{
+ int i;
+ const char *method;
+
+ if (mangle_fns)
+ return;
+
+ method = lp_mangling_method();
+
+ /* find the first mangling method that manages to initialise and
+ matches the "mangling method" parameter */
+ for (i=0; mangle_backends[i].name && !mangle_fns; i++) {
+ if (!method || !*method || strcmp(method, mangle_backends[i].name) == 0) {
+ mangle_fns = mangle_backends[i].init_fn();
+ }
+ }
+
+ if (!mangle_fns) {
+ DEBUG(0,("Failed to initialise mangling system '%s'\n", method));
+ exit_server("mangling init failed");
+ }
+}
+
+
+/*
+ reset the cache. This is called when smb.conf has been reloaded
+*/
+void mangle_reset_cache(void)
+{
+ mangle_init();
+ mangle_fns->reset();
+}
+
+void mangle_change_to_posix(void)
+{
+ mangle_fns = NULL;
+ lp_set_mangling_method("posix");
+ mangle_reset_cache();
+}
+
+/*
+ see if a filename has come out of our mangling code
+*/
+bool mangle_is_mangled(const char *s, const struct share_params *p)
+{
+ return mangle_fns->is_mangled(s, p);
+}
+
+/*
+ see if a filename matches the rules of a 8.3 filename
+*/
+bool mangle_is_8_3(const char *fname, bool check_case,
+ const struct share_params *p)
+{
+ return mangle_fns->is_8_3(fname, check_case, False, p);
+}
+
+bool mangle_is_8_3_wildcards(const char *fname, bool check_case,
+ const struct share_params *p)
+{
+ return mangle_fns->is_8_3(fname, check_case, True, p);
+}
+
+bool mangle_must_mangle(const char *fname,
+ const struct share_params *p)
+{
+ if (lp_mangled_names(p) == MANGLED_NAMES_NO) {
+ return False;
+ }
+ return mangle_fns->must_mangle(fname, p);
+}
+
+/*
+ try to reverse map a 8.3 name to the original filename. This doesn't have to
+ always succeed, as the directory handling code in smbd will scan the directory
+ looking for a matching name if it doesn't. It should succeed most of the time
+ or there will be a huge performance penalty
+*/
+bool mangle_lookup_name_from_8_3(TALLOC_CTX *ctx,
+ const char *in,
+ char **out, /* talloced on the given context. */
+ const struct share_params *p)
+{
+ return mangle_fns->lookup_name_from_8_3(ctx, in, out, p);
+}
+
+/*
+ mangle a long filename to a 8.3 name.
+ Return True if we did mangle the name (ie. out is filled in).
+ False on error.
+ JRA.
+ */
+
+bool name_to_8_3(const char *in,
+ char out[13],
+ bool cache83,
+ const struct share_params *p)
+{
+ memset(out,'\0',13);
+
+ /* name mangling can be disabled for speed, in which case
+ we just truncate the string */
+ if (lp_mangled_names(p) == MANGLED_NAMES_NO) {
+ strlcpy(out, in, 13);
+ return True;
+ }
+
+ return mangle_fns->name_to_8_3(in,
+ out,
+ cache83,
+ lp_default_case(p->service),
+ p);
+}