r12976: Patch from Brad Henry <j0j0@riod.ca>:

This patch pulls the AD site name generation and site join code from
libnet/libnet_join.c and puts it into a new file, libnet/libnet_site.c.
This way, a common means for site name, configuration dn and server dn
generation exists so it doesn't need to be rewritten in new code (such
as the future libnet_leave for example).

I've made a couple of changes, but nothing dramatic.  Nice work Brad!

Andrew Bartlett
(This used to be commit 45f67b3f6d506cc8cb9922184a8c0c9b59a8f702)

1 files changed, 252 insertions, 0 deletions

diff --git a/source4/libnet/libnet_site.c b/source4/libnet/libnet_site.c
new file mode 100644
index 00000000000..75efc0562db
--- /dev/null
+++ b/source4/libnet/libnet_site.c
@@ -0,0 +1,252 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   Copyright (C) Brad Henry	2005
+
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+#include "libnet/libnet.h"
+#include "libcli/cldap/cldap.h"
+#include "lib/ldb/include/ldb.h"
+#include "lib/ldb/include/ldb_errors.h"
+
+/*
+ * 1. Setup a CLDAP socket.
+ * 2. Lookup the default Site-Name.
+ */
+NTSTATUS libnet_FindSite(TALLOC_CTX *ctx, struct libnet_JoinSite *r)
+{
+	NTSTATUS status;
+	TALLOC_CTX *tmp_ctx;
+
+	char *site_name_str;
+	char *config_dn_str;
+	char *server_dn_str;
+
+	struct cldap_socket *cldap = NULL;
+	struct cldap_netlogon search;
+
+	tmp_ctx = talloc_named(ctx, 0, "libnet_FindSite temp context");
+	if (!tmp_ctx) {
+		r->out.error_string = NULL;
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	/* Resolve the site name. */
+	ZERO_STRUCT(search);
+	search.in.dest_address = r->in.dest_address;
+	search.in.acct_control = -1;
+	search.in.version = 6;
+
+	cldap = cldap_socket_init(tmp_ctx, NULL);
+	status = cldap_netlogon(cldap, tmp_ctx, &search);
+	if (!NT_STATUS_IS_OK(status)) {
+		/*
+		  If cldap_netlogon() returns in error,
+		  default to using Default-First-Site-Name.
+		*/
+		site_name_str = talloc_asprintf(tmp_ctx, "%s",
+						"Default-First-Site-Name");
+		if (!site_name_str) {
+			r->out.error_string = NULL;
+			talloc_free(tmp_ctx);
+			return NT_STATUS_NO_MEMORY;
+		}
+	} else {
+		site_name_str = talloc_asprintf(tmp_ctx, "%s",
+					search.out.netlogon.logon5.site_name);
+		if (!site_name_str) {
+			r->out.error_string = NULL;
+			talloc_free(tmp_ctx);
+			return NT_STATUS_NO_MEMORY;
+		}
+	}
+
+	/* Generate the CN=Configuration,... DN. */
+	config_dn_str = talloc_asprintf(tmp_ctx, "CN=Configuration,%s", r->in.domain_dn_str);
+	if (!config_dn_str) {
+		r->out.error_string = NULL;
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	/* Generate the CN=Servers,... DN. */
+	server_dn_str = talloc_asprintf(tmp_ctx, "CN=%s,CN=Servers,CN=%s,CN=Sites,%s",
+						 r->in.netbios_name, site_name_str, config_dn_str);
+	if (!server_dn_str) {
+		r->out.error_string = NULL;
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	r->out.site_name_str = site_name_str;
+	talloc_steal(r, site_name_str);
+
+	r->out.config_dn_str = config_dn_str;
+	talloc_steal(r, config_dn_str);
+
+	r->out.server_dn_str = server_dn_str;
+	talloc_steal(r, server_dn_str);
+
+	talloc_free(tmp_ctx);
+	return NT_STATUS_OK;
+}
+
+/*
+ * find out Site specific stuff:
+ * 1. Lookup the Site name.
+ * 2. Add entry CN=<netbios name>,CN=Servers,CN=<site name>,CN=Sites,CN=Configuration,<domain dn>.
+ * TODO: 3.) use DsAddEntry() to create CN=NTDS Settings,CN=<netbios name>,CN=Servers,CN=<site name>,...
+ */
+NTSTATUS libnet_JoinSite(struct ldb_context *remote_ldb,
+			 struct libnet_JoinDomain *libnet_r)
+{
+	NTSTATUS status;
+	TALLOC_CTX *tmp_ctx;
+
+	struct libnet_JoinSite *r;
+
+	struct ldb_dn *server_dn;
+	struct ldb_message *msg;
+	int rtn;
+
+	const char *server_dn_str;
+	const char *config_dn_str;
+
+	tmp_ctx = talloc_named(libnet_r, 0, "libnet_JoinSite temp context");
+	if (!tmp_ctx) {
+		libnet_r->out.error_string = NULL;
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	r = talloc(tmp_ctx, struct libnet_JoinSite);
+	if (!r) {
+		libnet_r->out.error_string = NULL;
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	/* Resolve the site name and AD DN's. */
+	r->in.dest_address = libnet_r->out.samr_binding->host;
+	r->in.netbios_name = libnet_r->in.netbios_name;
+	r->in.domain_dn_str = libnet_r->out.domain_dn_str;
+
+	status = libnet_FindSite(tmp_ctx, r);
+	if (!NT_STATUS_IS_OK(status)) {
+		libnet_r->out.error_string =
+			talloc_steal(libnet_r, r->out.error_string);
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	config_dn_str = r->out.config_dn_str;
+	server_dn_str = r->out.server_dn_str;
+
+	/*
+	 Add entry CN=<netbios name>,CN=Servers,CN=<site name>,CN=Sites,CN=Configuration,<domain dn>.
+	*/
+	msg = ldb_msg_new(tmp_ctx);
+	if (!msg) {
+		libnet_r->out.error_string = NULL;
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	rtn = ldb_msg_add_string(msg, "objectClass", "server");
+	if (rtn != 0) {
+		libnet_r->out.error_string = NULL;
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+	rtn = ldb_msg_add_string(msg, "systemFlags", "50000000");
+	if (rtn != 0) {
+		libnet_r->out.error_string = NULL;
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+	rtn = ldb_msg_add_string(msg, "serverReference", libnet_r->out.account_dn_str);
+	if (rtn != 0) {
+		libnet_r->out.error_string = NULL;
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	server_dn = ldb_dn_explode(tmp_ctx, server_dn_str);
+	if (server_dn == NULL) {
+		libnet_r->out.error_string = talloc_asprintf(libnet_r,
+					"Invalid server dn: %s",
+					server_dn_str);
+		talloc_free(tmp_ctx);
+		return NT_STATUS_UNSUCCESSFUL;
+	}
+
+	msg->dn = server_dn;
+
+	rtn = ldb_add(remote_ldb, msg);
+	if (rtn == LDB_ERR_ENTRY_ALREADY_EXISTS) {
+		int i;
+
+		/* make a 'modify' msg, and only for serverReference */
+		msg = ldb_msg_new(tmp_ctx);
+		if (!msg) {
+			libnet_r->out.error_string = NULL;
+			talloc_free(tmp_ctx);
+			return NT_STATUS_NO_MEMORY;
+		}
+		msg->dn = server_dn;
+
+		rtn = ldb_msg_add_string(msg, "serverReference",libnet_r->out.account_dn_str);
+		if (rtn != 0) {
+			libnet_r->out.error_string = NULL;
+			talloc_free(tmp_ctx);
+			return NT_STATUS_NO_MEMORY;
+		}
+
+		/* mark all the message elements (should be just one)
+		   as LDB_FLAG_MOD_REPLACE */
+		for (i=0;i<msg->num_elements;i++) {
+			msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
+		}
+
+		rtn = ldb_modify(remote_ldb, msg);
+		if (rtn != 0) {
+			libnet_r->out.error_string
+				= talloc_asprintf(libnet_r,
+						  "Failed to modify server entry %s: %s: %d",
+						  server_dn_str,
+						  ldb_errstring(remote_ldb), rtn);
+			talloc_free(tmp_ctx);
+			return NT_STATUS_INTERNAL_DB_CORRUPTION;
+		}
+	} else if (rtn != 0) {
+		libnet_r->out.error_string
+			= talloc_asprintf(libnet_r,
+				"Failed to add server entry %s: %s: %d",
+				server_dn_str, ldb_errstring(remote_ldb),
+				rtn);
+		talloc_free(tmp_ctx);
+		return NT_STATUS_INTERNAL_DB_CORRUPTION;
+	}
+	DEBUG(0, ("We still need to perform a DsAddEntry() so that we can create the CN=NTDS Settings container.\n"));
+
+	/* Store the server DN in libnet_r */
+	libnet_r->out.server_dn_str = server_dn_str;
+	talloc_steal(libnet_r, server_dn_str);
+
+	talloc_free(tmp_ctx);
+	return NT_STATUS_OK;
+}