libcli:nbt make the lmhosts parsing code and dependicies common

This starts the process to have Samba4 use lmhosts.

Andrew Bartlett

1 files changed, 156 insertions, 0 deletions

diff --git a/libcli/nbt/lmhosts.c b/libcli/nbt/lmhosts.c
new file mode 100644
index 00000000000..db81d31f501
--- /dev/null
+++ b/libcli/nbt/lmhosts.c
@@ -0,0 +1,156 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   manipulate nbt name structures
+
+   Copyright (C) Andrew Tridgell 1994-1998
+   Copyright (C) Jeremy Allison 2007
+   Copyright (C) Andrew Bartlett 2009.
+
+   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 "lib/util/xfile.h"
+#include "system/filesys.h"
+#include "system/network.h"
+
+/********************************************************
+ Start parsing the lmhosts file.
+*********************************************************/
+
+XFILE *startlmhosts(const char *fname)
+{
+	XFILE *fp = x_fopen(fname,O_RDONLY, 0);
+	if (!fp) {
+		DEBUG(4,("startlmhosts: Can't open lmhosts file %s. "
+			"Error was %s\n",
+			fname, strerror(errno)));
+		return NULL;
+	}
+	return fp;
+}
+
+/********************************************************
+ Parse the next line in the lmhosts file.
+*********************************************************/
+
+bool getlmhostsent(TALLOC_CTX *ctx, XFILE *fp, char **pp_name, int *name_type,
+		struct sockaddr_storage *pss)
+{
+	char line[1024];
+
+	*pp_name = NULL;
+
+	while(!x_feof(fp) && !x_ferror(fp)) {
+		char *ip = NULL;
+		char *flags = NULL;
+		char *extra = NULL;
+		char *name = NULL;
+		const char *ptr;
+		char *ptr1 = NULL;
+		int count = 0;
+
+		*name_type = -1;
+
+		if (!fgets_slash(line,sizeof(line),fp)) {
+			continue;
+		}
+
+		if (*line == '#') {
+			continue;
+		}
+
+		ptr = line;
+
+		if (next_token_talloc(ctx, &ptr, &ip, NULL))
+			++count;
+		if (next_token_talloc(ctx, &ptr, &name, NULL))
+			++count;
+		if (next_token_talloc(ctx, &ptr, &flags, NULL))
+			++count;
+		if (next_token_talloc(ctx, &ptr, &extra, NULL))
+			++count;
+
+		if (count <= 0)
+			continue;
+
+		if (count > 0 && count < 2) {
+			DEBUG(0,("getlmhostsent: Ill formed hosts line [%s]\n",
+						line));
+			continue;
+		}
+
+		if (count >= 4) {
+			DEBUG(0,("getlmhostsent: too many columns "
+				"in lmhosts file (obsolete syntax)\n"));
+			continue;
+		}
+
+		if (!flags) {
+			flags = talloc_strdup(ctx, "");
+			if (!flags) {
+				continue;
+			}
+		}
+
+		DEBUG(4, ("getlmhostsent: lmhost entry: %s %s %s\n",
+					ip, name, flags));
+
+		if (strchr_m(flags,'G') || strchr_m(flags,'S')) {
+			DEBUG(0,("getlmhostsent: group flag "
+				"in lmhosts ignored (obsolete)\n"));
+			continue;
+		}
+
+		if (!interpret_string_addr(pss, ip, AI_NUMERICHOST)) {
+			DEBUG(0,("getlmhostsent: invalid address "
+				"%s.\n", ip));
+		}
+
+		/* Extra feature. If the name ends in '#XX',
+		 * where XX is a hex number, then only add that name type. */
+		if((ptr1 = strchr_m(name, '#')) != NULL) {
+			char *endptr;
+      			ptr1++;
+
+			*name_type = (int)strtol(ptr1, &endptr, 16);
+			if(!*ptr1 || (endptr == ptr1)) {
+				DEBUG(0,("getlmhostsent: invalid name "
+					"%s containing '#'.\n", name));
+				continue;
+			}
+
+			*(--ptr1) = '\0'; /* Truncate at the '#' */
+		}
+
+		*pp_name = talloc_strdup(ctx, name);
+		if (!*pp_name) {
+			return false;
+		}
+		return true;
+	}
+
+	return false;
+}
+
+/********************************************************
+ Finish parsing the lmhosts file.
+*********************************************************/
+
+void endlmhosts(XFILE *fp)
+{
+	x_fclose(fp);
+}
+