r6223: added a bit more datagram infrastructure and the beginnings of a test

suite. The NBT-DGRAM test does a UDP/138 netlogon request, to which a
windows server sends a reply, but the windows server sends the reply
to the wrong port (it always sends to 138), so the test suite doesn't
see it.
(This used to be commit a7634625dbc944dd8256a822be290010f341a571)

3 files changed, 130 insertions, 5 deletions

diff --git a/source4/libcli/dgram/libdgram.h b/source4/libcli/dgram/libdgram.h
index 866877e341..482fd86980 100644
--- a/source4/libcli/dgram/libdgram.h
+++ b/source4/libcli/dgram/libdgram.h
@@ -111,8 +111,18 @@ struct dgram_mailslot_handler *dgram_mailslot_temp(struct nbt_dgram_socket *dgms
 						   void *private);
 
 
-
-
-
+NTSTATUS dgram_mailslot_send(struct nbt_dgram_socket *dgmsock,
+			     enum dgram_msg_type msg_type,
+			     const char *mailslot_name,
+			     struct nbt_name *dest_name,
+			     const char *dest_address,
+			     struct nbt_name *src_name,
+			     DATA_BLOB *request);
+
+NTSTATUS dgram_mailslot_netlogon_send(struct nbt_dgram_socket *dgmsock,
+				      struct nbt_name *dest_name,
+				      const char *dest_address,
+				      struct nbt_name *src_name,
+				      struct nbt_netlogon_packet *request);
 
 
diff --git a/source4/libcli/dgram/mailslot.c b/source4/libcli/dgram/mailslot.c
index da9b6cdd20..89aab9c874 100644
--- a/source4/libcli/dgram/mailslot.c
+++ b/source4/libcli/dgram/mailslot.c
@@ -115,9 +115,9 @@ struct dgram_mailslot_handler *dgram_mailslot_temp(struct nbt_dgram_socket *dgms
 
 	/* try a 100 times at most */
 	for (i=0;i<100;i++) {
-		name = talloc_asprintf(dgmsock, "%s%u", 
+		name = talloc_asprintf(dgmsock, "%s%03u", 
 				       mailslot_name,
-				       generate_random() % UINT16_MAX);
+				       generate_random() % 1000);
 		if (name == NULL) return NULL;
 		if (dgram_mailslot_find(dgmsock, name)) {
 			talloc_free(name);
@@ -130,3 +130,60 @@ struct dgram_mailslot_handler *dgram_mailslot_temp(struct nbt_dgram_socket *dgms
 	DEBUG(2,("Unable to create temporary mailslot from %s\n", mailslot_name));
 	return NULL;
 }
+
+
+/*
+  send a mailslot request
+*/
+NTSTATUS dgram_mailslot_send(struct nbt_dgram_socket *dgmsock,
+			     enum dgram_msg_type msg_type,
+			     const char *mailslot_name,
+			     struct nbt_name *dest_name,
+			     const char *dest_address,
+			     struct nbt_name *src_name,
+			     DATA_BLOB *request)
+{
+	TALLOC_CTX *tmp_ctx = talloc_new(dgmsock);
+	struct nbt_dgram_packet packet;
+	struct dgram_message *msg;
+	struct dgram_smb_packet *smb;
+	struct smb_trans_body *trans;
+	NTSTATUS status;
+
+	ZERO_STRUCT(packet);
+	packet.msg_type = msg_type;
+	packet.flags = DGRAM_FLAG_FIRST;
+	packet.dgram_id = generate_random() % UINT16_MAX;
+	packet.source = socket_get_my_addr(dgmsock->sock, tmp_ctx);
+	packet.src_port = socket_get_my_port(dgmsock->sock);
+
+	msg = &packet.data.msg;
+	/* this length calculation is very crude - it should be based on gensize
+	   calls */
+	msg->length = 138 + strlen(mailslot_name) + request->length; 
+	msg->offset = 0;
+
+	msg->source_name = *src_name;
+	msg->dest_name = *dest_name;
+	msg->dgram_body_type = DGRAM_SMB;
+
+	smb = &msg->body.smb;
+	smb->smb_command = SMB_TRANSACTION;
+
+	trans = &smb->body.trans;
+	trans->total_data_count = request->length;
+	trans->timeout     = (uint32_t)-1;
+	trans->data_count  = request->length;
+	trans->data_offset = 70 + strlen(mailslot_name);
+	trans->opcode      = 1; /* write mail slot */
+	trans->priority    = 1;
+	trans->class       = 2;
+	trans->mailslot_name = mailslot_name;
+	trans->data = *request;
+
+	status = nbt_dgram_send(dgmsock, &packet, dest_address, lp_dgram_port());
+
+	talloc_free(tmp_ctx);
+
+	return status;
+}
diff --git a/source4/libcli/dgram/netlogon.c b/source4/libcli/dgram/netlogon.c
new file mode 100644
index 0000000000..1f3a3d6c62
--- /dev/null
+++ b/source4/libcli/dgram/netlogon.c
@@ -0,0 +1,58 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   handling for netlogon dgram requests
+
+   Copyright (C) Andrew Tridgell 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 "lib/events/events.h"
+#include "dlinklist.h"
+#include "libcli/nbt/libnbt.h"
+#include "libcli/dgram/libdgram.h"
+#include "lib/socket/socket.h"
+#include "librpc/gen_ndr/ndr_nbt.h"
+
+/* 
+   send a netlogon mailslot request 
+*/
+NTSTATUS dgram_mailslot_netlogon_send(struct nbt_dgram_socket *dgmsock,
+				      struct nbt_name *dest_name,
+				      const char *dest_address,
+				      struct nbt_name *src_name,
+				      struct nbt_netlogon_packet *request)
+{
+	NTSTATUS status;
+	DATA_BLOB blob;
+	TALLOC_CTX *tmp_ctx = talloc_new(dgmsock);
+
+	status = ndr_push_struct_blob(&blob, tmp_ctx, request, 
+				      (ndr_push_flags_fn_t)ndr_push_nbt_netlogon_packet);
+	if (!NT_STATUS_IS_OK(status)) {
+		talloc_free(tmp_ctx);
+		return status;
+	}
+
+
+	status = dgram_mailslot_send(dgmsock, DGRAM_DIRECT_UNIQUE, 
+				     "\\MAILSLOT\\NET\\NETLOGON",
+				     dest_name, dest_address, src_name, &blob);
+	talloc_free(tmp_ctx);
+	return status;
+}
+