Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 153 insertions, 0 deletions

diff --git a/source3/smbd/mangle.c b/source3/smbd/mangle.c
new file mode 100644
index 0000000..dbb187a
--- /dev/null
+++ b/source3/smbd/mangle.c
@@ -0,0 +1,153 @@
+/*
+   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);
+}