s4-dns: added basic DLZ writeable support to dlz_bind9

this implements the expanded DLZ update driver API, allowing for bind9
to send dynamic updates to the Samba DLZ driver.

This change also adds support for exporting all DNS zones in the SAM
database, which also means we now correctly separate the _msdcs zone
from the main zone.

1 files changed, 140 insertions, 0 deletions

diff --git a/source4/dns_server/dlz_minimal.h b/source4/dns_server/dlz_minimal.h
new file mode 100644
index 00000000000..2e60c70580c
--- /dev/null
+++ b/source4/dns_server/dlz_minimal.h
@@ -0,0 +1,140 @@
+/*
+ * Copyright (C) 2010 Andrew Tridgell
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the
+ * above copyright notice and this permission notice appear in all
+ * copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR
+ * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
+ * THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+ * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+ * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE
+ * USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+  This header provides a minimal set of defines and typedefs needed
+  for building an external DLZ module for bind9. When creating a new
+  external DLZ driver, please copy this header into your own source
+  tree.
+ */
+typedef unsigned int isc_result_t;
+typedef bool isc_boolean_t;
+typedef uint32_t dns_ttl_t;
+
+#define DLZ_DLOPEN_VERSION 1
+
+/* return this in flags to dlz_version() if thread safe */
+#define DNS_SDLZFLAG_THREADSAFE		0x00000001U
+
+/* result codes */
+#define ISC_R_SUCCESS			0
+#define ISC_R_NOMEMORY			1
+#define ISC_R_NOTFOUND			23
+#define ISC_R_FAILURE			25
+
+/* log levels */
+#define ISC_LOG_INFO		(-1)
+#define ISC_LOG_NOTICE		(-2)
+#define ISC_LOG_WARNING 	(-3)
+#define ISC_LOG_ERROR		(-4)
+#define ISC_LOG_CRITICAL	(-5)
+
+/* some opaque structures */
+typedef void *dns_sdlzlookup_t;
+typedef void *dns_sdlzallnodes_t;
+typedef void *dns_view_t;
+
+/*
+ * prototypes for the functions you can include in your driver
+ */
+
+
+/*
+ * dlz_version() is required for all DLZ external drivers. It should
+ * return DLZ_DLOPEN_VERSION
+ */
+int dlz_version(unsigned int *flags);
+
+/*
+ * dlz_create() is required for all DLZ external drivers.
+ */
+isc_result_t dlz_create(const char *dlzname, unsigned int argc, char *argv[], void **dbdata, ...);
+
+/*
+ * dlz_destroy() is optional, and will be called when the driver is
+ * unloaded if supplied
+ */
+void dlz_destroy(void *dbdata);
+
+/*
+  dlz_findzonedb is required for all DLZ external drivers
+ */
+isc_result_t dlz_findzonedb(void *dbdata, const char *name);
+
+/*
+  dlz_lookup is required for all DLZ external drivers
+ */
+isc_result_t dlz_lookup(const char *zone, const char *name,
+			void *dbdata, dns_sdlzlookup_t *lookup);
+
+/*
+  dlz_allowzonexfr() is optional, and should be supplied if you want
+  to support zone transfers
+ */
+isc_result_t dlz_allowzonexfr(void *dbdata, const char *name, const char *client);
+
+
+/*
+  dlz_allnodes() is optional, but must be supplied if supply a
+  dlz_allowzonexfr() function
+ */
+isc_result_t dlz_allnodes(const char *zone, void *dbdata, dns_sdlzallnodes_t *allnodes);
+
+/*
+  dlz_newversion() is optional. It should be supplied if you want to
+  support dynamic updates.
+ */
+isc_result_t dlz_newversion(const char *zone, void *dbdata, void **versionp);
+
+/*
+   dlz_closeversion() is optional, but must be supplied if you supply
+   a dlz_newversion() function
+ */
+void dlz_closeversion(const char *zone, isc_boolean_t commit, void *dbdata, void **versionp);
+
+/*
+  dlz_configure() is optional, but must be supplied if you want to
+  support dynamic updates
+ */
+isc_result_t dlz_configure(dns_view_t *view, void *dbdata);
+
+/*
+  dlz_ssumatch() is optional, but must be supplied if you want to
+  support dynamic updates
+ */
+isc_boolean_t dlz_ssumatch(const char *signer, const char *name, const char *tcpaddr,
+			   const char *type, const char *key, uint32_t keydatalen, uint8_t *keydata,
+			   void *dbdata);
+
+/*
+  dlz_addrdataset() is optional, but must be supplied if you want to
+  support dynamic updates
+ */
+isc_result_t dlz_addrdataset(const char *name, const char *rdatastr, void *dbdata, void *version);
+
+/*
+  dlz_subrdataset() is optional, but must be supplied if you want to
+  support dynamic updates
+ */
+isc_result_t dlz_subrdataset(const char *name, const char *rdatastr, void *dbdata, void *version);
+
+/*
+  dlz_delrdataset() is optional, but must be supplied if you want to
+  support dynamic updates
+ */
+isc_result_t dlz_delrdataset(const char *name, void *dbdata, void *version);