lib/addns: move DNS client library to the main directory.

Guenther

1 files changed, 151 insertions, 0 deletions

diff --git a/lib/addns/dnsutils.c b/lib/addns/dnsutils.c
new file mode 100644
index 0000000000..37b862c7f0
--- /dev/null
+++ b/lib/addns/dnsutils.c
@@ -0,0 +1,151 @@
+/*
+  Linux DNS client library implementation
+
+  Copyright (C) 2006 Krishna Ganugapati <krishnag@centeris.com>
+  Copyright (C) 2006 Gerald Carter <jerry@samba.org>
+
+     ** NOTE! The following LGPL license applies to the libaddns
+     ** library. This does NOT imply that all of Samba is released
+     ** under the LGPL
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "dns.h"
+#include <ctype.h>
+
+static DNS_ERROR LabelList( TALLOC_CTX *mem_ctx,
+			    const char *name,
+			    struct dns_domain_label **presult )
+{
+	struct dns_domain_label *result;
+	const char *dot;
+
+	for (dot = name; *dot != '\0'; dot += 1) {
+		char c = *dot;
+
+		if (c == '.')
+			break;
+
+		if (c == '-') continue;
+		if ((c >= 'a') && (c <= 'z')) continue;
+		if ((c >= 'A') && (c <= 'Z')) continue;
+		if ((c >= '0') && (c <= '9')) continue;
+
+		return ERROR_DNS_INVALID_NAME;
+	}
+
+	if ((dot - name) > 63) {
+		/*
+		 * DNS labels can only be 63 chars long
+		 */
+		return ERROR_DNS_INVALID_NAME;
+	}
+
+	if (!(result = TALLOC_ZERO_P(mem_ctx, struct dns_domain_label))) {
+		return ERROR_DNS_NO_MEMORY;
+	}
+
+	if (*dot == '\0') {
+		/*
+		 * No dot around, so this is the last component
+		 */
+
+		if (!(result->label = talloc_strdup(result, name))) {
+			TALLOC_FREE(result);
+			return ERROR_DNS_NO_MEMORY;
+		}
+		result->len = strlen(result->label);
+		*presult = result;
+		return ERROR_DNS_SUCCESS;
+	}
+
+	if (dot[1] == '.') {
+		/*
+		 * Two dots in a row, reject
+		 */
+
+		TALLOC_FREE(result);
+		return ERROR_DNS_INVALID_NAME;
+	}
+
+	if (dot[1] != '\0') {
+		/*
+		 * Something follows, get the rest
+		 */
+
+		DNS_ERROR err = LabelList(result, dot+1, &result->next);
+
+		if (!ERR_DNS_IS_OK(err)) {
+			TALLOC_FREE(result);
+			return err;
+		}
+	}
+
+	result->len = (dot - name);
+
+	if (!(result->label = talloc_strndup(result, name, result->len))) {
+		TALLOC_FREE(result);
+		return ERROR_DNS_NO_MEMORY;
+	}
+
+	*presult = result;
+	return ERROR_DNS_SUCCESS;
+}
+
+DNS_ERROR dns_domain_name_from_string( TALLOC_CTX *mem_ctx,
+				       const char *pszDomainName,
+				       struct dns_domain_name **presult )
+{
+	struct dns_domain_name *result;
+	DNS_ERROR err;
+
+	if (!(result = talloc(mem_ctx, struct dns_domain_name))) {
+		return ERROR_DNS_NO_MEMORY;
+	}
+
+	err = LabelList( result, pszDomainName, &result->pLabelList );
+	if (!ERR_DNS_IS_OK(err)) {
+		TALLOC_FREE(result);
+		return err;
+	}
+
+	*presult = result;
+	return ERROR_DNS_SUCCESS;
+}
+
+/*********************************************************************
+*********************************************************************/
+
+char *dns_generate_keyname( TALLOC_CTX *mem_ctx )
+{
+	char *result = NULL;
+#if defined(WITH_DNS_UPDATES)
+
+	uuid_t uuid;
+
+	/*
+	 * uuid_unparse gives 36 bytes plus '\0'
+	 */
+	if (!(result = TALLOC_ARRAY(mem_ctx, char, 37))) {
+		return NULL;
+	}
+
+	uuid_generate( uuid );
+	uuid_unparse( uuid, result );
+
+#endif
+
+	return result;
+}