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-rw-r--r--lib/addns/dnsutils.c149
1 files changed, 149 insertions, 0 deletions
diff --git a/lib/addns/dnsutils.c b/lib/addns/dnsutils.c
new file mode 100644
index 0000000..d1a3173
--- /dev/null
+++ b/lib/addns/dnsutils.c
@@ -0,0 +1,149 @@
+/*
+ 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 "includes.h"
+#include "librpc/ndr/libndr.h"
+#include "librpc/gen_ndr/ndr_misc.h"
+
+#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(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(HAVE_KRB5)
+
+ struct GUID guid;
+
+ guid = GUID_random();
+ result = GUID_string(mem_ctx, &guid);
+
+#endif
+
+ return result;
+}