s4-nbt: move libcli/nbt up one level.

Guenther

8 files changed, 3042 insertions, 0 deletions

diff --git a/libcli/nbt/libnbt.h b/libcli/nbt/libnbt.h
new file mode 100644
index 0000000000..4ef4e9d60d
--- /dev/null
+++ b/libcli/nbt/libnbt.h
@@ -0,0 +1,351 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   a raw async NBT library
+
+   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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __LIBNBT_H__
+#define __LIBNBT_H__
+
+#include "librpc/gen_ndr/nbt.h"
+#include "librpc/ndr/libndr.h"
+
+/*
+  possible states for pending requests
+*/
+enum nbt_request_state {NBT_REQUEST_SEND,
+			NBT_REQUEST_WAIT,
+			NBT_REQUEST_DONE,
+			NBT_REQUEST_TIMEOUT,
+			NBT_REQUEST_ERROR};
+
+/*
+  a nbt name request
+*/
+struct nbt_name_request {
+	struct nbt_name_request *next, *prev;
+
+	enum nbt_request_state state;
+
+	NTSTATUS status;
+
+	/* the socket this was on */
+	struct nbt_name_socket *nbtsock;
+
+	/* where to send the request */
+	struct socket_address *dest;
+
+	/* timeout between retries */
+	int timeout;
+
+	/* how many retries to send on timeout */
+	int num_retries;
+
+	/* whether we have received a WACK */
+	bool received_wack;
+
+	/* the timeout event */
+	struct timed_event *te;
+
+	/* the name transaction id */
+	uint16_t name_trn_id;
+
+	/* is it a reply? */
+	bool is_reply;
+
+	/* the encoded request */
+	DATA_BLOB encoded;
+
+	/* shall we allow multiple replies? */
+	bool allow_multiple_replies;
+
+	unsigned int num_replies;
+	struct nbt_name_reply {
+		struct nbt_name_packet *packet;
+		struct socket_address *dest;
+	} *replies;
+
+	/* information on what to do on completion */
+	struct {
+		void (*fn)(struct nbt_name_request *);
+		void *private_data;
+	} async;
+};
+
+
+
+/*
+  context structure for operations on name queries
+*/
+struct nbt_name_socket {
+	struct socket_context *sock;
+	struct event_context *event_ctx;
+	struct smb_iconv_convenience *iconv_convenience;
+
+	/* a queue of requests pending to be sent */
+	struct nbt_name_request *send_queue;
+
+	/* the fd event */
+	struct fd_event *fde;
+
+	/* mapping from name_trn_id to pending event */
+	struct idr_context *idr;
+
+	/* how many requests are waiting for a reply */
+	uint16_t num_pending;
+
+	/* what to do with incoming request packets */
+	struct {
+		void (*handler)(struct nbt_name_socket *, struct nbt_name_packet *,
+				struct socket_address *);
+		void *private_data;
+	} incoming;
+
+	/* what to do with unexpected replies */
+	struct {
+		void (*handler)(struct nbt_name_socket *, struct nbt_name_packet *,
+				struct socket_address *);
+		void *private_data;
+	} unexpected;
+};
+
+
+/* a simple name query */
+struct nbt_name_query {
+	struct {
+		struct nbt_name name;
+		const char *dest_addr;
+		uint16_t dest_port;
+		bool broadcast;
+		bool wins_lookup;
+		int timeout; /* in seconds */
+		int retries;
+	} in;
+	struct {
+		const char *reply_from;
+		struct nbt_name name;
+		int16_t num_addrs;
+		const char **reply_addrs;
+	} out;
+};
+
+/* a simple name status query */
+struct nbt_name_status {
+	struct {
+		struct nbt_name name;
+		const char *dest_addr;
+		uint16_t dest_port;
+		int timeout; /* in seconds */
+		int retries;
+	} in;
+	struct {
+		const char *reply_from;
+		struct nbt_name name;
+		struct nbt_rdata_status status;
+	} out;
+};
+
+/* a name registration request */
+struct nbt_name_register {
+	struct {
+		struct nbt_name name;
+		const char *dest_addr;
+		uint16_t dest_port;
+		const char *address;
+		uint16_t nb_flags;
+		bool register_demand;
+		bool broadcast;
+		bool multi_homed;
+		uint32_t ttl;
+		int timeout; /* in seconds */
+		int retries;
+	} in;
+	struct {
+		const char *reply_from;
+		struct nbt_name name;
+		const char *reply_addr;
+		uint8_t rcode;
+	} out;
+};
+
+/* a send 3 times then demand name broadcast name registration */
+struct nbt_name_register_bcast {
+	struct {
+		struct nbt_name name;
+		const char *dest_addr;
+		uint16_t dest_port;
+		const char *address;
+		uint16_t nb_flags;
+		uint32_t ttl;
+	} in;
+};
+
+
+/* wins name register with multiple wins servers to try and multiple
+   addresses to register */
+struct nbt_name_register_wins {
+	struct {
+		struct nbt_name name;
+		const char **wins_servers;
+		uint16_t wins_port;
+		const char **addresses;
+		uint16_t nb_flags;
+		uint32_t ttl;
+	} in;
+	struct {
+		const char *wins_server;
+		uint8_t rcode;
+	} out;
+};
+
+
+
+/* a name refresh request */
+struct nbt_name_refresh {
+	struct {
+		struct nbt_name name;
+		const char *dest_addr;
+		uint16_t dest_port;
+		const char *address;
+		uint16_t nb_flags;
+		bool broadcast;
+		uint32_t ttl;
+		int timeout; /* in seconds */
+		int retries;
+	} in;
+	struct {
+		const char *reply_from;
+		struct nbt_name name;
+		const char *reply_addr;
+		uint8_t rcode;
+	} out;
+};
+
+/* wins name refresh with multiple wins servers to try and multiple
+   addresses to register */
+struct nbt_name_refresh_wins {
+	struct {
+		struct nbt_name name;
+		const char **wins_servers;
+		uint16_t wins_port;
+		const char **addresses;
+		uint16_t nb_flags;
+		uint32_t ttl;
+	} in;
+	struct {
+		const char *wins_server;
+		uint8_t rcode;
+	} out;
+};
+
+
+/* a name release request */
+struct nbt_name_release {
+	struct {
+		struct nbt_name name;
+		const char *dest_addr;
+		uint16_t dest_port;
+		const char *address;
+		uint16_t nb_flags;
+		bool broadcast;
+		int timeout; /* in seconds */
+		int retries;
+	} in;
+	struct {
+		const char *reply_from;
+		struct nbt_name name;
+		const char *reply_addr;
+		uint8_t rcode;
+	} out;
+};
+
+struct nbt_name_socket *nbt_name_socket_init(TALLOC_CTX *mem_ctx,
+					     struct event_context *event_ctx,
+					     struct smb_iconv_convenience *iconv_convenience);
+struct nbt_name_request *nbt_name_query_send(struct nbt_name_socket *nbtsock,
+					     struct nbt_name_query *io);
+NTSTATUS nbt_name_query_recv(struct nbt_name_request *req,
+			     TALLOC_CTX *mem_ctx, struct nbt_name_query *io);
+NTSTATUS nbt_name_query(struct nbt_name_socket *nbtsock,
+			TALLOC_CTX *mem_ctx, struct nbt_name_query *io);
+struct nbt_name_request *nbt_name_status_send(struct nbt_name_socket *nbtsock,
+					      struct nbt_name_status *io);
+NTSTATUS nbt_name_status_recv(struct nbt_name_request *req,
+			     TALLOC_CTX *mem_ctx, struct nbt_name_status *io);
+NTSTATUS nbt_name_status(struct nbt_name_socket *nbtsock,
+			TALLOC_CTX *mem_ctx, struct nbt_name_status *io);
+
+NTSTATUS nbt_name_dup(TALLOC_CTX *mem_ctx, struct nbt_name *name, struct nbt_name *newname);
+NTSTATUS nbt_name_to_blob(TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *iconv_convenience, DATA_BLOB *blob, struct nbt_name *name);
+NTSTATUS nbt_name_from_blob(TALLOC_CTX *mem_ctx, const DATA_BLOB *blob, struct nbt_name *name);
+void nbt_choose_called_name(TALLOC_CTX *mem_ctx, struct nbt_name *n, const char *name, int type);
+char *nbt_name_string(TALLOC_CTX *mem_ctx, const struct nbt_name *name);
+NTSTATUS nbt_name_register(struct nbt_name_socket *nbtsock,
+			   TALLOC_CTX *mem_ctx, struct nbt_name_register *io);
+NTSTATUS nbt_name_refresh(struct nbt_name_socket *nbtsock,
+			   TALLOC_CTX *mem_ctx, struct nbt_name_refresh *io);
+NTSTATUS nbt_name_release(struct nbt_name_socket *nbtsock,
+			   TALLOC_CTX *mem_ctx, struct nbt_name_release *io);
+NTSTATUS nbt_name_register_wins(struct nbt_name_socket *nbtsock,
+				TALLOC_CTX *mem_ctx,
+				struct nbt_name_register_wins *io);
+NTSTATUS nbt_name_refresh_wins(struct nbt_name_socket *nbtsock,
+				TALLOC_CTX *mem_ctx,
+				struct nbt_name_refresh_wins *io);
+NTSTATUS nbt_name_register_recv(struct nbt_name_request *req,
+				TALLOC_CTX *mem_ctx, struct nbt_name_register *io);
+struct nbt_name_request *nbt_name_register_send(struct nbt_name_socket *nbtsock,
+						struct nbt_name_register *io);
+NTSTATUS nbt_name_release_recv(struct nbt_name_request *req,
+			       TALLOC_CTX *mem_ctx, struct nbt_name_release *io);
+
+struct nbt_name_request *nbt_name_release_send(struct nbt_name_socket *nbtsock,
+					       struct nbt_name_release *io);
+
+NTSTATUS nbt_name_refresh_recv(struct nbt_name_request *req,
+			       TALLOC_CTX *mem_ctx, struct nbt_name_refresh *io);
+
+NTSTATUS nbt_set_incoming_handler(struct nbt_name_socket *nbtsock,
+				  void (*handler)(struct nbt_name_socket *, struct nbt_name_packet *,
+						  struct socket_address *),
+				  void *private_data);
+NTSTATUS nbt_name_reply_send(struct nbt_name_socket *nbtsock,
+			     struct socket_address *dest,
+			     struct nbt_name_packet *request);
+
+
+NDR_SCALAR_PROTO(wrepl_nbt_name, const struct nbt_name *);
+NDR_SCALAR_PROTO(nbt_string, const char *);
+NDR_BUFFER_PROTO(nbt_name, struct nbt_name);
+NTSTATUS nbt_rcode_to_ntstatus(uint8_t rcode);
+
+struct composite_context;
+struct composite_context *nbt_name_register_bcast_send(struct nbt_name_socket *nbtsock,
+						       struct nbt_name_register_bcast *io);
+NTSTATUS nbt_name_register_bcast_recv(struct composite_context *c);
+struct composite_context *nbt_name_register_wins_send(struct nbt_name_socket *nbtsock,
+						      struct nbt_name_register_wins *io);
+NTSTATUS nbt_name_refresh_wins_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
+				     struct nbt_name_refresh_wins *io);
+struct composite_context *nbt_name_refresh_wins_send(struct nbt_name_socket *nbtsock,
+						      struct nbt_name_refresh_wins *io);
+NTSTATUS nbt_name_register_wins_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
+				     struct nbt_name_register_wins *io);
+
+
+#endif /* __LIBNBT_H__ */
diff --git a/libcli/nbt/namequery.c b/libcli/nbt/namequery.c
new file mode 100644
index 0000000000..ed3d8a2492
--- /dev/null
+++ b/libcli/nbt/namequery.c
@@ -0,0 +1,235 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   make nbt name query 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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "../libcli/nbt/libnbt.h"
+#include "../libcli/nbt/nbt_proto.h"
+#include "lib/socket/socket.h"
+#include "param/param.h"
+
+/**
+  send a nbt name query
+*/
+_PUBLIC_ struct nbt_name_request *nbt_name_query_send(struct nbt_name_socket *nbtsock,
+					     struct nbt_name_query *io)
+{
+	struct nbt_name_request *req;
+	struct nbt_name_packet *packet;
+	struct socket_address *dest;
+
+	packet = talloc_zero(nbtsock, struct nbt_name_packet);
+	if (packet == NULL) return NULL;
+
+	packet->qdcount = 1;
+	packet->operation = NBT_OPCODE_QUERY;
+	if (io->in.broadcast) {
+		packet->operation |= NBT_FLAG_BROADCAST;
+	}
+	if (io->in.wins_lookup) {
+		packet->operation |= NBT_FLAG_RECURSION_DESIRED;
+	}
+
+	packet->questions = talloc_array(packet, struct nbt_name_question, 1);
+	if (packet->questions == NULL) goto failed;
+
+	packet->questions[0].name = io->in.name;
+	packet->questions[0].question_type = NBT_QTYPE_NETBIOS;
+	packet->questions[0].question_class = NBT_QCLASS_IP;
+
+	dest = socket_address_from_strings(packet, nbtsock->sock->backend_name,
+					   io->in.dest_addr, io->in.dest_port);
+	if (dest == NULL) goto failed;
+	req = nbt_name_request_send(nbtsock, dest, packet,
+				    io->in.timeout, io->in.retries, false);
+	if (req == NULL) goto failed;
+
+	talloc_free(packet);
+	return req;
+
+failed:
+	talloc_free(packet);
+	return NULL;
+}
+
+/**
+  wait for a name query reply
+*/
+_PUBLIC_ NTSTATUS nbt_name_query_recv(struct nbt_name_request *req,
+			     TALLOC_CTX *mem_ctx, struct nbt_name_query *io)
+{
+	NTSTATUS status;
+	struct nbt_name_packet *packet;
+	int i;
+
+	status = nbt_name_request_recv(req);
+	if (!NT_STATUS_IS_OK(status) ||
+	    req->num_replies == 0) {
+		talloc_free(req);
+		return status;
+	}
+
+	packet = req->replies[0].packet;
+	io->out.reply_from = talloc_steal(mem_ctx, req->replies[0].dest->addr);
+
+	if ((packet->operation & NBT_RCODE) != 0) {
+		status = nbt_rcode_to_ntstatus(packet->operation & NBT_RCODE);
+		talloc_free(req);
+		return status;
+	}
+
+	if (packet->ancount != 1 ||
+	    packet->answers[0].rr_type != NBT_QTYPE_NETBIOS ||
+	    packet->answers[0].rr_class != NBT_QCLASS_IP) {
+		talloc_free(req);
+		return status;
+	}
+
+	io->out.name = packet->answers[0].name;
+	io->out.num_addrs = packet->answers[0].rdata.netbios.length / 6;
+	io->out.reply_addrs = talloc_array(mem_ctx, const char *, io->out.num_addrs+1);
+	if (io->out.reply_addrs == NULL) {
+		talloc_free(req);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	for (i=0;i<io->out.num_addrs;i++) {
+		io->out.reply_addrs[i] = talloc_steal(io->out.reply_addrs,
+						      packet->answers[0].rdata.netbios.addresses[i].ipaddr);
+	}
+	io->out.reply_addrs[i] = NULL;
+
+	talloc_steal(mem_ctx, io->out.name.name);
+	talloc_steal(mem_ctx, io->out.name.scope);
+
+	talloc_free(req);
+
+	return NT_STATUS_OK;
+}
+
+/**
+  wait for a name query reply
+*/
+_PUBLIC_ NTSTATUS nbt_name_query(struct nbt_name_socket *nbtsock,
+			TALLOC_CTX *mem_ctx, struct nbt_name_query *io)
+{
+	struct nbt_name_request *req = nbt_name_query_send(nbtsock, io);
+	return nbt_name_query_recv(req, mem_ctx, io);
+}
+
+
+/**
+  send a nbt name status
+*/
+_PUBLIC_ struct nbt_name_request *nbt_name_status_send(struct nbt_name_socket *nbtsock,
+					      struct nbt_name_status *io)
+{
+	struct nbt_name_request *req;
+	struct nbt_name_packet *packet;
+	struct socket_address *dest;
+
+	packet = talloc_zero(nbtsock, struct nbt_name_packet);
+	if (packet == NULL) return NULL;
+
+	packet->qdcount = 1;
+	packet->operation = NBT_OPCODE_QUERY;
+
+	packet->questions = talloc_array(packet, struct nbt_name_question, 1);
+	if (packet->questions == NULL) goto failed;
+
+	packet->questions[0].name = io->in.name;
+	packet->questions[0].question_type = NBT_QTYPE_STATUS;
+	packet->questions[0].question_class = NBT_QCLASS_IP;
+
+	dest = socket_address_from_strings(packet, nbtsock->sock->backend_name,
+					   io->in.dest_addr, io->in.dest_port);
+	if (dest == NULL) goto failed;
+	req = nbt_name_request_send(nbtsock, dest, packet,
+				    io->in.timeout, io->in.retries, false);
+	if (req == NULL) goto failed;
+
+	talloc_free(packet);
+	return req;
+
+failed:
+	talloc_free(packet);
+	return NULL;
+}
+
+/**
+  wait for a name status reply
+*/
+_PUBLIC_ NTSTATUS nbt_name_status_recv(struct nbt_name_request *req,
+			     TALLOC_CTX *mem_ctx, struct nbt_name_status *io)
+{
+	NTSTATUS status;
+	struct nbt_name_packet *packet;
+	int i;
+
+	status = nbt_name_request_recv(req);
+	if (!NT_STATUS_IS_OK(status) ||
+	    req->num_replies == 0) {
+		talloc_free(req);
+		return status;
+	}
+
+	packet = req->replies[0].packet;
+	io->out.reply_from = talloc_steal(mem_ctx, req->replies[0].dest->addr);
+
+	if ((packet->operation & NBT_RCODE) != 0) {
+		status = nbt_rcode_to_ntstatus(packet->operation & NBT_RCODE);
+		talloc_free(req);
+		return status;
+	}
+
+	if (packet->ancount != 1 ||
+	    packet->answers[0].rr_type != NBT_QTYPE_STATUS ||
+	    packet->answers[0].rr_class != NBT_QCLASS_IP) {
+		talloc_free(req);
+		return NT_STATUS_INVALID_NETWORK_RESPONSE;
+	}
+
+	io->out.name = packet->answers[0].name;
+	talloc_steal(mem_ctx, io->out.name.name);
+	talloc_steal(mem_ctx, io->out.name.scope);
+
+	io->out.status = packet->answers[0].rdata.status;
+	talloc_steal(mem_ctx, io->out.status.names);
+	for (i=0;i<io->out.status.num_names;i++) {
+		talloc_steal(io->out.status.names, io->out.status.names[i].name);
+	}
+
+
+	talloc_free(req);
+
+	return NT_STATUS_OK;
+}
+
+/**
+  wait for a name status reply
+*/
+_PUBLIC_ NTSTATUS nbt_name_status(struct nbt_name_socket *nbtsock,
+			TALLOC_CTX *mem_ctx, struct nbt_name_status *io)
+{
+	struct nbt_name_request *req = nbt_name_status_send(nbtsock, io);
+	return nbt_name_status_recv(req, mem_ctx, io);
+}
+
+
diff --git a/libcli/nbt/namerefresh.c b/libcli/nbt/namerefresh.c
new file mode 100644
index 0000000000..37bf0fc8f1
--- /dev/null
+++ b/libcli/nbt/namerefresh.c
@@ -0,0 +1,302 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   send out a name refresh request
+
+   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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "../libcli/nbt/libnbt.h"
+#include "../libcli/nbt/nbt_proto.h"
+#include "libcli/composite/composite.h"
+#include "lib/socket/socket.h"
+#include "param/param.h"
+
+/*
+  send a nbt name refresh request
+*/
+struct nbt_name_request *nbt_name_refresh_send(struct nbt_name_socket *nbtsock,
+					       struct nbt_name_refresh *io)
+{
+	struct nbt_name_request *req;
+	struct nbt_name_packet *packet;
+	struct socket_address *dest;
+
+	packet = talloc_zero(nbtsock, struct nbt_name_packet);
+	if (packet == NULL) return NULL;
+
+	packet->qdcount = 1;
+	packet->arcount = 1;
+	packet->operation = NBT_OPCODE_REFRESH;
+	if (io->in.broadcast) {
+		packet->operation |= NBT_FLAG_BROADCAST;
+	}
+
+	packet->questions = talloc_array(packet, struct nbt_name_question, 1);
+	if (packet->questions == NULL) goto failed;
+
+	packet->questions[0].name           = io->in.name;
+	packet->questions[0].question_type  = NBT_QTYPE_NETBIOS;
+	packet->questions[0].question_class = NBT_QCLASS_IP;
+
+	packet->additional = talloc_array(packet, struct nbt_res_rec, 1);
+	if (packet->additional == NULL) goto failed;
+
+	packet->additional[0].name                   = io->in.name;
+	packet->additional[0].rr_type                = NBT_QTYPE_NETBIOS;
+	packet->additional[0].rr_class               = NBT_QCLASS_IP;
+	packet->additional[0].ttl                    = io->in.ttl;
+	packet->additional[0].rdata.netbios.length   = 6;
+	packet->additional[0].rdata.netbios.addresses = talloc_array(packet->additional,
+								     struct nbt_rdata_address, 1);
+	if (packet->additional[0].rdata.netbios.addresses == NULL) goto failed;
+	packet->additional[0].rdata.netbios.addresses[0].nb_flags = io->in.nb_flags;
+	packet->additional[0].rdata.netbios.addresses[0].ipaddr =
+		talloc_strdup(packet->additional, io->in.address);
+
+	dest = socket_address_from_strings(nbtsock,
+					   nbtsock->sock->backend_name,
+					   io->in.dest_addr, io->in.dest_port);
+	if (dest == NULL) goto failed;
+	req = nbt_name_request_send(nbtsock, dest, packet,
+				    io->in.timeout, io->in.retries, false);
+	if (req == NULL) goto failed;
+
+	talloc_free(packet);
+	return req;
+
+failed:
+	talloc_free(packet);
+	return NULL;
+}
+
+/*
+  wait for a refresh reply
+*/
+_PUBLIC_ NTSTATUS nbt_name_refresh_recv(struct nbt_name_request *req,
+			       TALLOC_CTX *mem_ctx, struct nbt_name_refresh *io)
+{
+	NTSTATUS status;
+	struct nbt_name_packet *packet;
+
+	status = nbt_name_request_recv(req);
+	if (!NT_STATUS_IS_OK(status) ||
+	    req->num_replies == 0) {
+		talloc_free(req);
+		return status;
+	}
+
+	packet = req->replies[0].packet;
+	io->out.reply_from = talloc_steal(mem_ctx, req->replies[0].dest->addr);
+
+	if (packet->ancount != 1 ||
+	    packet->answers[0].rr_type != NBT_QTYPE_NETBIOS ||
+	    packet->answers[0].rr_class != NBT_QCLASS_IP) {
+		talloc_free(req);
+		return NT_STATUS_INVALID_NETWORK_RESPONSE;
+	}
+
+	io->out.rcode = packet->operation & NBT_RCODE;
+	io->out.name = packet->answers[0].name;
+	if (packet->answers[0].rdata.netbios.length < 6) {
+		talloc_free(req);
+		return NT_STATUS_INVALID_NETWORK_RESPONSE;
+	}
+	io->out.reply_addr = talloc_steal(mem_ctx,
+					  packet->answers[0].rdata.netbios.addresses[0].ipaddr);
+	talloc_steal(mem_ctx, io->out.name.name);
+	talloc_steal(mem_ctx, io->out.name.scope);
+
+	talloc_free(req);
+
+	return NT_STATUS_OK;
+}
+
+/*
+  synchronous name refresh request
+*/
+_PUBLIC_ NTSTATUS nbt_name_refresh(struct nbt_name_socket *nbtsock,
+			   TALLOC_CTX *mem_ctx, struct nbt_name_refresh *io)
+{
+	struct nbt_name_request *req = nbt_name_refresh_send(nbtsock, io);
+	return nbt_name_refresh_recv(req, mem_ctx, io);
+}
+
+
+
+/**
+  a wins name refresh with multiple WINS servers and multiple
+  addresses to refresh. Try each WINS server in turn, until we get a
+  reply for each address
+*/
+struct refresh_wins_state {
+	struct nbt_name_socket *nbtsock;
+	struct nbt_name_refresh *io;
+	const char **wins_servers;
+	uint16_t wins_port;
+	const char **addresses;
+	int address_idx;
+	struct nbt_name_request *req;
+};
+
+
+/**
+  state handler for WINS multi-homed multi-server name refresh
+*/
+static void name_refresh_wins_handler(struct nbt_name_request *req)
+{
+	struct composite_context *c = talloc_get_type(req->async.private_data,
+						      struct composite_context);
+	struct refresh_wins_state *state = talloc_get_type(c->private_data,
+							    struct refresh_wins_state);
+	NTSTATUS status;
+
+	status = nbt_name_refresh_recv(state->req, state, state->io);
+	if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT)) {
+		/* the refresh timed out - try the next WINS server */
+		state->wins_servers++;
+		state->address_idx = 0;
+		if (state->wins_servers[0] == NULL) {
+			c->state = COMPOSITE_STATE_ERROR;
+			c->status = status;
+			goto done;
+		}
+		state->io->in.dest_addr = state->wins_servers[0];
+		state->io->in.dest_port = state->wins_port;
+		state->io->in.address   = state->addresses[0];
+		state->req = nbt_name_refresh_send(state->nbtsock, state->io);
+		if (state->req == NULL) {
+			c->state = COMPOSITE_STATE_ERROR;
+			c->status = NT_STATUS_NO_MEMORY;
+		} else {
+			state->req->async.fn      = name_refresh_wins_handler;
+			state->req->async.private_data = c;
+		}
+	} else if (!NT_STATUS_IS_OK(status)) {
+		c->state = COMPOSITE_STATE_ERROR;
+		c->status = status;
+	} else {
+		if (state->io->out.rcode == 0 &&
+		    state->addresses[state->address_idx+1] != NULL) {
+			/* refresh our next address */
+			state->io->in.address = state->addresses[++(state->address_idx)];
+			state->req = nbt_name_refresh_send(state->nbtsock, state->io);
+			if (state->req == NULL) {
+				c->state = COMPOSITE_STATE_ERROR;
+				c->status = NT_STATUS_NO_MEMORY;
+			} else {
+				state->req->async.fn      = name_refresh_wins_handler;
+				state->req->async.private_data = c;
+			}
+		} else {
+			c->state = COMPOSITE_STATE_DONE;
+			c->status = NT_STATUS_OK;
+		}
+	}
+
+done:
+	if (c->state >= COMPOSITE_STATE_DONE &&
+	    c->async.fn) {
+		c->async.fn(c);
+	}
+}
+
+/**
+  the async send call for a multi-server WINS refresh
+*/
+_PUBLIC_ struct composite_context *nbt_name_refresh_wins_send(struct nbt_name_socket *nbtsock,
+						      struct nbt_name_refresh_wins *io)
+{
+	struct composite_context *c;
+	struct refresh_wins_state *state;
+
+	c = talloc_zero(nbtsock, struct composite_context);
+	if (c == NULL) goto failed;
+
+	state = talloc(c, struct refresh_wins_state);
+	if (state == NULL) goto failed;
+
+	state->io = talloc(state, struct nbt_name_refresh);
+	if (state->io == NULL) goto failed;
+
+	state->wins_port = io->in.wins_port;
+	state->wins_servers = str_list_copy(state, io->in.wins_servers);
+	if (state->wins_servers == NULL ||
+	    state->wins_servers[0] == NULL) goto failed;
+
+	state->addresses = str_list_copy(state, io->in.addresses);
+	if (state->addresses == NULL ||
+	    state->addresses[0] == NULL) goto failed;
+
+	state->io->in.name            = io->in.name;
+	state->io->in.dest_addr       = state->wins_servers[0];
+	state->io->in.dest_port       = state->wins_port;
+	state->io->in.address         = io->in.addresses[0];
+	state->io->in.nb_flags        = io->in.nb_flags;
+	state->io->in.broadcast       = false;
+	state->io->in.ttl             = io->in.ttl;
+	state->io->in.timeout         = 2;
+	state->io->in.retries         = 2;
+
+	state->nbtsock     = nbtsock;
+	state->address_idx = 0;
+
+	state->req = nbt_name_refresh_send(nbtsock, state->io);
+	if (state->req == NULL) goto failed;
+
+	state->req->async.fn      = name_refresh_wins_handler;
+	state->req->async.private_data = c;
+
+	c->private_data	= state;
+	c->state	= COMPOSITE_STATE_IN_PROGRESS;
+	c->event_ctx	= nbtsock->event_ctx;
+
+	return c;
+
+failed:
+	talloc_free(c);
+	return NULL;
+}
+
+/*
+  multi-homed WINS name refresh - recv side
+*/
+_PUBLIC_ NTSTATUS nbt_name_refresh_wins_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
+				     struct nbt_name_refresh_wins *io)
+{
+	NTSTATUS status;
+	status = composite_wait(c);
+	if (NT_STATUS_IS_OK(status)) {
+		struct refresh_wins_state *state =
+			talloc_get_type(c->private_data, struct refresh_wins_state);
+		io->out.wins_server = talloc_steal(mem_ctx, state->wins_servers[0]);
+		io->out.rcode = state->io->out.rcode;
+	}
+	talloc_free(c);
+	return status;
+}
+
+/*
+  multi-homed WINS refresh - sync interface
+*/
+_PUBLIC_ NTSTATUS nbt_name_refresh_wins(struct nbt_name_socket *nbtsock,
+				TALLOC_CTX *mem_ctx,
+				struct nbt_name_refresh_wins *io)
+{
+	struct composite_context *c = nbt_name_refresh_wins_send(nbtsock, io);
+	return nbt_name_refresh_wins_recv(c, mem_ctx, io);
+}
diff --git a/libcli/nbt/nameregister.c b/libcli/nbt/nameregister.c
new file mode 100644
index 0000000000..d4728a8e02
--- /dev/null
+++ b/libcli/nbt/nameregister.c
@@ -0,0 +1,442 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   send out a name registration request
+
+   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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "../libcli/nbt/libnbt.h"
+#include "../libcli/nbt/nbt_proto.h"
+#include "libcli/composite/composite.h"
+#include "lib/socket/socket.h"
+#include "librpc/gen_ndr/ndr_nbt.h"
+#include "param/param.h"
+
+/*
+  send a nbt name registration request
+*/
+struct nbt_name_request *nbt_name_register_send(struct nbt_name_socket *nbtsock,
+						struct nbt_name_register *io)
+{
+	struct nbt_name_request *req;
+	struct nbt_name_packet *packet;
+	struct socket_address *dest;
+
+	packet = talloc_zero(nbtsock, struct nbt_name_packet);
+	if (packet == NULL) return NULL;
+
+	packet->qdcount = 1;
+	packet->arcount = 1;
+	if (io->in.multi_homed) {
+		packet->operation = NBT_OPCODE_MULTI_HOME_REG;
+	} else {
+		packet->operation = NBT_OPCODE_REGISTER;
+	}
+	if (io->in.broadcast) {
+		packet->operation |= NBT_FLAG_BROADCAST;
+	}
+	if (io->in.register_demand) {
+		packet->operation |= NBT_FLAG_RECURSION_DESIRED;
+	}
+
+	packet->questions = talloc_array(packet, struct nbt_name_question, 1);
+	if (packet->questions == NULL) goto failed;
+
+	packet->questions[0].name           = io->in.name;
+	packet->questions[0].question_type  = NBT_QTYPE_NETBIOS;
+	packet->questions[0].question_class = NBT_QCLASS_IP;
+
+	packet->additional = talloc_array(packet, struct nbt_res_rec, 1);
+	if (packet->additional == NULL) goto failed;
+
+	packet->additional[0].name                   = io->in.name;
+	packet->additional[0].rr_type                = NBT_QTYPE_NETBIOS;
+	packet->additional[0].rr_class               = NBT_QCLASS_IP;
+	packet->additional[0].ttl                    = io->in.ttl;
+	packet->additional[0].rdata.netbios.length   = 6;
+	packet->additional[0].rdata.netbios.addresses = talloc_array(packet->additional,
+								     struct nbt_rdata_address, 1);
+	if (packet->additional[0].rdata.netbios.addresses == NULL) goto failed;
+	packet->additional[0].rdata.netbios.addresses[0].nb_flags = io->in.nb_flags;
+	packet->additional[0].rdata.netbios.addresses[0].ipaddr =
+		talloc_strdup(packet->additional, io->in.address);
+	if (packet->additional[0].rdata.netbios.addresses[0].ipaddr == NULL) goto failed;
+
+	dest = socket_address_from_strings(packet, nbtsock->sock->backend_name,
+					   io->in.dest_addr, io->in.dest_port);
+	if (dest == NULL) goto failed;
+	req = nbt_name_request_send(nbtsock, dest, packet,
+				    io->in.timeout, io->in.retries, false);
+	if (req == NULL) goto failed;
+
+	talloc_free(packet);
+	return req;
+
+failed:
+	talloc_free(packet);
+	return NULL;
+}
+
+/*
+  wait for a registration reply
+*/
+_PUBLIC_ NTSTATUS nbt_name_register_recv(struct nbt_name_request *req,
+				TALLOC_CTX *mem_ctx, struct nbt_name_register *io)
+{
+	NTSTATUS status;
+	struct nbt_name_packet *packet;
+
+	status = nbt_name_request_recv(req);
+	if (!NT_STATUS_IS_OK(status) ||
+	    req->num_replies == 0) {
+		talloc_free(req);
+		return status;
+	}
+
+	packet = req->replies[0].packet;
+	io->out.reply_from = talloc_steal(mem_ctx, req->replies[0].dest->addr);
+
+	if (packet->ancount != 1 ||
+	    packet->answers[0].rr_type != NBT_QTYPE_NETBIOS ||
+	    packet->answers[0].rr_class != NBT_QCLASS_IP) {
+		talloc_free(req);
+		return NT_STATUS_INVALID_NETWORK_RESPONSE;
+	}
+
+	io->out.rcode = packet->operation & NBT_RCODE;
+	io->out.name = packet->answers[0].name;
+	if (packet->answers[0].rdata.netbios.length < 6) {
+		talloc_free(req);
+		return NT_STATUS_INVALID_NETWORK_RESPONSE;
+	}
+	io->out.reply_addr = talloc_steal(mem_ctx,
+					  packet->answers[0].rdata.netbios.addresses[0].ipaddr);
+	talloc_steal(mem_ctx, io->out.name.name);
+	talloc_steal(mem_ctx, io->out.name.scope);
+
+	talloc_free(req);
+
+	return NT_STATUS_OK;
+}
+
+/*
+  synchronous name registration request
+*/
+_PUBLIC_ NTSTATUS nbt_name_register(struct nbt_name_socket *nbtsock,
+			   TALLOC_CTX *mem_ctx, struct nbt_name_register *io)
+{
+	struct nbt_name_request *req = nbt_name_register_send(nbtsock, io);
+	return nbt_name_register_recv(req, mem_ctx, io);
+}
+
+
+/*
+  a 4 step broadcast registration. 3 lots of name registration requests, followed by
+  a name registration demand
+*/
+struct register_bcast_state {
+	struct nbt_name_socket *nbtsock;
+	struct nbt_name_register *io;
+	struct nbt_name_request *req;
+};
+
+
+/*
+  state handler for 4 stage name registration
+*/
+static void name_register_bcast_handler(struct nbt_name_request *req)
+{
+	struct composite_context *c = talloc_get_type(req->async.private_data, struct composite_context);
+	struct register_bcast_state *state = talloc_get_type(c->private_data, struct register_bcast_state);
+	NTSTATUS status;
+
+	status = nbt_name_register_recv(state->req, state, state->io);
+	if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT)) {
+		if (state->io->in.register_demand == true) {
+			/* all done */
+			c->state = COMPOSITE_STATE_DONE;
+			c->status = NT_STATUS_OK;
+			goto done;
+		}
+
+		/* the registration timed out - good, send the demand */
+		state->io->in.register_demand = true;
+		state->io->in.retries         = 0;
+		state->req = nbt_name_register_send(state->nbtsock, state->io);
+		if (state->req == NULL) {
+			c->state = COMPOSITE_STATE_ERROR;
+			c->status = NT_STATUS_NO_MEMORY;
+		} else {
+			state->req->async.fn      = name_register_bcast_handler;
+			state->req->async.private_data = c;
+		}
+	} else if (!NT_STATUS_IS_OK(status)) {
+		c->state = COMPOSITE_STATE_ERROR;
+		c->status = status;
+	} else {
+		c->state = COMPOSITE_STATE_ERROR;
+		c->status = NT_STATUS_CONFLICTING_ADDRESSES;
+		DEBUG(3,("Name registration conflict from %s for %s with ip %s - rcode %d\n",
+			 state->io->out.reply_from,
+			 nbt_name_string(state, &state->io->out.name),
+			 state->io->out.reply_addr,
+			 state->io->out.rcode));
+	}
+
+done:
+	if (c->state >= COMPOSITE_STATE_DONE &&
+	    c->async.fn) {
+		c->async.fn(c);
+	}
+}
+
+/*
+  the async send call for a 4 stage name registration
+*/
+_PUBLIC_ struct composite_context *nbt_name_register_bcast_send(struct nbt_name_socket *nbtsock,
+						       struct nbt_name_register_bcast *io)
+{
+	struct composite_context *c;
+	struct register_bcast_state *state;
+
+	c = talloc_zero(nbtsock, struct composite_context);
+	if (c == NULL) goto failed;
+
+	state = talloc(c, struct register_bcast_state);
+	if (state == NULL) goto failed;
+
+	state->io = talloc(state, struct nbt_name_register);
+	if (state->io == NULL) goto failed;
+
+	state->io->in.name            = io->in.name;
+	state->io->in.dest_addr       = io->in.dest_addr;
+	state->io->in.dest_port       = io->in.dest_port;
+	state->io->in.address         = io->in.address;
+	state->io->in.nb_flags        = io->in.nb_flags;
+	state->io->in.register_demand = false;
+	state->io->in.broadcast       = true;
+	state->io->in.multi_homed     = false;
+	state->io->in.ttl             = io->in.ttl;
+	state->io->in.timeout         = 1;
+	state->io->in.retries         = 2;
+
+	state->nbtsock = nbtsock;
+
+	state->req = nbt_name_register_send(nbtsock, state->io);
+	if (state->req == NULL) goto failed;
+
+	state->req->async.fn      = name_register_bcast_handler;
+	state->req->async.private_data = c;
+
+	c->private_data	= state;
+	c->state	= COMPOSITE_STATE_IN_PROGRESS;
+	c->event_ctx	= nbtsock->event_ctx;
+
+	return c;
+
+failed:
+	talloc_free(c);
+	return NULL;
+}
+
+/*
+  broadcast 4 part name register - recv
+*/
+_PUBLIC_ NTSTATUS nbt_name_register_bcast_recv(struct composite_context *c)
+{
+	NTSTATUS status;
+	status = composite_wait(c);
+	talloc_free(c);
+	return status;
+}
+
+/*
+  broadcast 4 part name register - sync interface
+*/
+NTSTATUS nbt_name_register_bcast(struct nbt_name_socket *nbtsock,
+				 struct nbt_name_register_bcast *io)
+{
+	struct composite_context *c = nbt_name_register_bcast_send(nbtsock, io);
+	return nbt_name_register_bcast_recv(c);
+}
+
+
+/*
+  a wins name register with multiple WINS servers and multiple
+  addresses to register. Try each WINS server in turn, until we get a
+  reply for each address
+*/
+struct register_wins_state {
+	struct nbt_name_socket *nbtsock;
+	struct nbt_name_register *io;
+	const char **wins_servers;
+	uint16_t wins_port;
+	const char **addresses;
+	int address_idx;
+	struct nbt_name_request *req;
+};
+
+
+/*
+  state handler for WINS multi-homed multi-server name register
+*/
+static void name_register_wins_handler(struct nbt_name_request *req)
+{
+	struct composite_context *c = talloc_get_type(req->async.private_data,
+						      struct composite_context);
+	struct register_wins_state *state = talloc_get_type(c->private_data,
+							    struct register_wins_state);
+	NTSTATUS status;
+
+	status = nbt_name_register_recv(state->req, state, state->io);
+	if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT)) {
+		/* the register timed out - try the next WINS server */
+		state->wins_servers++;
+		state->address_idx = 0;
+		if (state->wins_servers[0] == NULL) {
+			c->state = COMPOSITE_STATE_ERROR;
+			c->status = status;
+			goto done;
+		}
+		state->io->in.dest_addr = state->wins_servers[0];
+		state->io->in.dest_port = state->wins_port;
+		state->io->in.address   = state->addresses[0];
+		state->req = nbt_name_register_send(state->nbtsock, state->io);
+		if (state->req == NULL) {
+			c->state = COMPOSITE_STATE_ERROR;
+			c->status = NT_STATUS_NO_MEMORY;
+		} else {
+			state->req->async.fn      = name_register_wins_handler;
+			state->req->async.private_data = c;
+		}
+	} else if (!NT_STATUS_IS_OK(status)) {
+		c->state = COMPOSITE_STATE_ERROR;
+		c->status = status;
+	} else {
+		if (state->io->out.rcode == 0 &&
+		    state->addresses[state->address_idx+1] != NULL) {
+			/* register our next address */
+			state->io->in.address = state->addresses[++(state->address_idx)];
+			state->req = nbt_name_register_send(state->nbtsock, state->io);
+			if (state->req == NULL) {
+				c->state = COMPOSITE_STATE_ERROR;
+				c->status = NT_STATUS_NO_MEMORY;
+			} else {
+				state->req->async.fn      = name_register_wins_handler;
+				state->req->async.private_data = c;
+			}
+		} else {
+			c->state = COMPOSITE_STATE_DONE;
+			c->status = NT_STATUS_OK;
+		}
+	}
+
+done:
+	if (c->state >= COMPOSITE_STATE_DONE &&
+	    c->async.fn) {
+		c->async.fn(c);
+	}
+}
+
+/*
+  the async send call for a multi-server WINS register
+*/
+_PUBLIC_ struct composite_context *nbt_name_register_wins_send(struct nbt_name_socket *nbtsock,
+						      struct nbt_name_register_wins *io)
+{
+	struct composite_context *c;
+	struct register_wins_state *state;
+
+	c = talloc_zero(nbtsock, struct composite_context);
+	if (c == NULL) goto failed;
+
+	state = talloc(c, struct register_wins_state);
+	if (state == NULL) goto failed;
+
+	state->io = talloc(state, struct nbt_name_register);
+	if (state->io == NULL) goto failed;
+
+	state->wins_port = io->in.wins_port;
+	state->wins_servers = str_list_copy(state, io->in.wins_servers);
+	if (state->wins_servers == NULL ||
+	    state->wins_servers[0] == NULL) goto failed;
+
+	state->addresses = str_list_copy(state, io->in.addresses);
+	if (state->addresses == NULL ||
+	    state->addresses[0] == NULL) goto failed;
+
+	state->io->in.name            = io->in.name;
+	state->io->in.dest_addr       = state->wins_servers[0];
+	state->io->in.dest_port       = state->wins_port;
+	state->io->in.address         = io->in.addresses[0];
+	state->io->in.nb_flags        = io->in.nb_flags;
+	state->io->in.broadcast       = false;
+	state->io->in.register_demand = false;
+	state->io->in.multi_homed     = (io->in.nb_flags & NBT_NM_GROUP)?false:true;
+	state->io->in.ttl             = io->in.ttl;
+	state->io->in.timeout         = 3;
+	state->io->in.retries         = 2;
+
+	state->nbtsock     = nbtsock;
+	state->address_idx = 0;
+
+	state->req = nbt_name_register_send(nbtsock, state->io);
+	if (state->req == NULL) goto failed;
+
+	state->req->async.fn      = name_register_wins_handler;
+	state->req->async.private_data = c;
+
+	c->private_data	= state;
+	c->state	= COMPOSITE_STATE_IN_PROGRESS;
+	c->event_ctx	= nbtsock->event_ctx;
+
+	return c;
+
+failed:
+	talloc_free(c);
+	return NULL;
+}
+
+/*
+  multi-homed WINS name register - recv side
+*/
+_PUBLIC_ NTSTATUS nbt_name_register_wins_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
+				     struct nbt_name_register_wins *io)
+{
+	NTSTATUS status;
+	status = composite_wait(c);
+	if (NT_STATUS_IS_OK(status)) {
+		struct register_wins_state *state =
+			talloc_get_type(c->private_data, struct register_wins_state);
+		io->out.wins_server = talloc_steal(mem_ctx, state->wins_servers[0]);
+		io->out.rcode = state->io->out.rcode;
+	}
+	talloc_free(c);
+	return status;
+}
+
+/*
+  multi-homed WINS register - sync interface
+*/
+_PUBLIC_ NTSTATUS nbt_name_register_wins(struct nbt_name_socket *nbtsock,
+				TALLOC_CTX *mem_ctx,
+				struct nbt_name_register_wins *io)
+{
+	struct composite_context *c = nbt_name_register_wins_send(nbtsock, io);
+	return nbt_name_register_wins_recv(c, mem_ctx, io);
+}
diff --git a/libcli/nbt/namerelease.c b/libcli/nbt/namerelease.c
new file mode 100644
index 0000000000..e57a2f396e
--- /dev/null
+++ b/libcli/nbt/namerelease.c
@@ -0,0 +1,135 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   send out a name release request
+
+   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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "../libcli/nbt/libnbt.h"
+#include "../libcli/nbt/nbt_proto.h"
+#include "lib/socket/socket.h"
+#include "param/param.h"
+
+/*
+  send a nbt name release request
+*/
+_PUBLIC_ struct nbt_name_request *nbt_name_release_send(struct nbt_name_socket *nbtsock,
+					       struct nbt_name_release *io)
+{
+	struct nbt_name_request *req;
+	struct nbt_name_packet *packet;
+	struct socket_address *dest;
+
+	packet = talloc_zero(nbtsock, struct nbt_name_packet);
+	if (packet == NULL) return NULL;
+
+	packet->qdcount = 1;
+	packet->arcount = 1;
+	packet->operation = NBT_OPCODE_RELEASE;
+	if (io->in.broadcast) {
+		packet->operation |= NBT_FLAG_BROADCAST;
+	}
+
+	packet->questions = talloc_array(packet, struct nbt_name_question, 1);
+	if (packet->questions == NULL) goto failed;
+
+	packet->questions[0].name           = io->in.name;
+	packet->questions[0].question_type  = NBT_QTYPE_NETBIOS;
+	packet->questions[0].question_class = NBT_QCLASS_IP;
+
+	packet->additional = talloc_array(packet, struct nbt_res_rec, 1);
+	if (packet->additional == NULL) goto failed;
+
+	packet->additional[0].name                   = io->in.name;
+	packet->additional[0].rr_type                = NBT_QTYPE_NETBIOS;
+	packet->additional[0].rr_class               = NBT_QCLASS_IP;
+	packet->additional[0].ttl                    = 0;
+	packet->additional[0].rdata.netbios.length   = 6;
+	packet->additional[0].rdata.netbios.addresses = talloc_array(packet->additional,
+								     struct nbt_rdata_address, 1);
+	if (packet->additional[0].rdata.netbios.addresses == NULL) goto failed;
+	packet->additional[0].rdata.netbios.addresses[0].nb_flags = io->in.nb_flags;
+	packet->additional[0].rdata.netbios.addresses[0].ipaddr =
+		talloc_strdup(packet->additional, io->in.address);
+
+	dest = socket_address_from_strings(packet, nbtsock->sock->backend_name,
+					   io->in.dest_addr, io->in.dest_port);
+	if (dest == NULL) goto failed;
+	req = nbt_name_request_send(nbtsock, dest, packet,
+				    io->in.timeout, io->in.retries, false);
+	if (req == NULL) goto failed;
+
+	talloc_free(packet);
+	return req;
+
+failed:
+	talloc_free(packet);
+	return NULL;
+}
+
+/*
+  wait for a release reply
+*/
+_PUBLIC_ NTSTATUS nbt_name_release_recv(struct nbt_name_request *req,
+			       TALLOC_CTX *mem_ctx, struct nbt_name_release *io)
+{
+	NTSTATUS status;
+	struct nbt_name_packet *packet;
+
+	status = nbt_name_request_recv(req);
+	if (!NT_STATUS_IS_OK(status) ||
+	    req->num_replies == 0) {
+		talloc_free(req);
+		return status;
+	}
+
+	packet = req->replies[0].packet;
+	io->out.reply_from = talloc_steal(mem_ctx, req->replies[0].dest->addr);
+
+	if (packet->ancount != 1 ||
+	    packet->answers[0].rr_type != NBT_QTYPE_NETBIOS ||
+	    packet->answers[0].rr_class != NBT_QCLASS_IP) {
+		talloc_free(req);
+		return NT_STATUS_INVALID_NETWORK_RESPONSE;
+	}
+
+	io->out.rcode = packet->operation & NBT_RCODE;
+	io->out.name = packet->answers[0].name;
+	if (packet->answers[0].rdata.netbios.length < 6) {
+		talloc_free(req);
+		return NT_STATUS_INVALID_NETWORK_RESPONSE;
+	}
+	io->out.reply_addr = talloc_steal(mem_ctx,
+					  packet->answers[0].rdata.netbios.addresses[0].ipaddr);
+	talloc_steal(mem_ctx, io->out.name.name);
+	talloc_steal(mem_ctx, io->out.name.scope);
+
+	talloc_free(req);
+
+	return NT_STATUS_OK;
+}
+
+/*
+  synchronous name release request
+*/
+_PUBLIC_ NTSTATUS nbt_name_release(struct nbt_name_socket *nbtsock,
+			   TALLOC_CTX *mem_ctx, struct nbt_name_release *io)
+{
+	struct nbt_name_request *req = nbt_name_release_send(nbtsock, io);
+	return nbt_name_release_recv(req, mem_ctx, io);
+}
diff --git a/libcli/nbt/nbtname.c b/libcli/nbt/nbtname.c
new file mode 100644
index 0000000000..338cb21089
--- /dev/null
+++ b/libcli/nbt/nbtname.c
@@ -0,0 +1,648 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   manipulate nbt name structures
+
+   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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+/*
+  see rfc1002 for the detailed format of compressed names
+*/
+
+#include "includes.h"
+#include "librpc/gen_ndr/ndr_nbt.h"
+#include "librpc/gen_ndr/ndr_misc.h"
+#include "system/locale.h"
+
+/* don't allow an unlimited number of name components */
+#define MAX_COMPONENTS 10
+
+/**
+  print a nbt string
+*/
+_PUBLIC_ void ndr_print_nbt_string(struct ndr_print *ndr, const char *name, const char *s)
+{
+	ndr_print_string(ndr, name, s);
+}
+
+/*
+  pull one component of a nbt_string
+*/
+static enum ndr_err_code ndr_pull_component(struct ndr_pull *ndr,
+					    uint8_t **component,
+					    uint32_t *offset,
+					    uint32_t *max_offset)
+{
+	uint8_t len;
+	uint_t loops = 0;
+	while (loops < 5) {
+		if (*offset >= ndr->data_size) {
+			return ndr_pull_error(ndr, NDR_ERR_STRING,
+					      "BAD NBT NAME component");
+		}
+		len = ndr->data[*offset];
+		if (len == 0) {
+			*offset += 1;
+			*max_offset = MAX(*max_offset, *offset);
+			*component = NULL;
+			return NDR_ERR_SUCCESS;
+		}
+		if ((len & 0xC0) == 0xC0) {
+			/* its a label pointer */
+			if (1 + *offset >= ndr->data_size) {
+				return ndr_pull_error(ndr, NDR_ERR_STRING,
+						      "BAD NBT NAME component");
+			}
+			*max_offset = MAX(*max_offset, *offset + 2);
+			*offset = ((len&0x3F)<<8) | ndr->data[1 + *offset];
+			*max_offset = MAX(*max_offset, *offset);
+			loops++;
+			continue;
+		}
+		if ((len & 0xC0) != 0) {
+			/* its a reserved length field */
+			return ndr_pull_error(ndr, NDR_ERR_STRING,
+					      "BAD NBT NAME component");
+		}
+		if (*offset + len + 2 > ndr->data_size) {
+			return ndr_pull_error(ndr, NDR_ERR_STRING,
+					      "BAD NBT NAME component");
+		}
+		*component = (uint8_t*)talloc_strndup(ndr, (const char *)&ndr->data[1 + *offset], len);
+		NDR_ERR_HAVE_NO_MEMORY(*component);
+		*offset += len + 1;
+		*max_offset = MAX(*max_offset, *offset);
+		return NDR_ERR_SUCCESS;
+	}
+
+	/* too many pointers */
+	return ndr_pull_error(ndr, NDR_ERR_STRING, "BAD NBT NAME component");
+}
+
+/**
+  pull a nbt_string from the wire
+*/
+_PUBLIC_ enum ndr_err_code ndr_pull_nbt_string(struct ndr_pull *ndr, int ndr_flags, const char **s)
+{
+	uint32_t offset = ndr->offset;
+	uint32_t max_offset = offset;
+	unsigned num_components;
+	char *name;
+
+	if (!(ndr_flags & NDR_SCALARS)) {
+		return NDR_ERR_SUCCESS;
+	}
+
+	name = NULL;
+
+	/* break up name into a list of components */
+	for (num_components=0;num_components<MAX_COMPONENTS;num_components++) {
+		uint8_t *component = NULL;
+		NDR_CHECK(ndr_pull_component(ndr, &component, &offset, &max_offset));
+		if (component == NULL) break;
+		if (name) {
+			name = talloc_asprintf_append_buffer(name, ".%s", component);
+			NDR_ERR_HAVE_NO_MEMORY(name);
+		} else {
+			name = (char *)component;
+		}
+	}
+	if (num_components == MAX_COMPONENTS) {
+		return ndr_pull_error(ndr, NDR_ERR_STRING,
+				      "BAD NBT NAME too many components");
+	}
+	if (num_components == 0) {
+		name = talloc_strdup(ndr, "");
+		NDR_ERR_HAVE_NO_MEMORY(name);
+	}
+
+	(*s) = name;
+	ndr->offset = max_offset;
+
+	return NDR_ERR_SUCCESS;
+}
+
+/**
+  push a nbt string to the wire
+*/
+_PUBLIC_ enum ndr_err_code ndr_push_nbt_string(struct ndr_push *ndr, int ndr_flags, const char *s)
+{
+	if (!(ndr_flags & NDR_SCALARS)) {
+		return NDR_ERR_SUCCESS;
+	}
+
+	while (s && *s) {
+		enum ndr_err_code ndr_err;
+		char *compname;
+		size_t complen;
+		uint32_t offset;
+
+		/* see if we have pushed the remaing string allready,
+		 * if so we use a label pointer to this string
+		 */
+		ndr_err = ndr_token_retrieve_cmp_fn(&ndr->nbt_string_list, s, &offset, (comparison_fn_t)strcmp, false);
+		if (NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+			uint8_t b[2];
+
+			if (offset > 0x3FFF) {
+				return ndr_push_error(ndr, NDR_ERR_STRING,
+						      "offset for nbt string label pointer %u[%08X] > 0x00003FFF",
+						      offset, offset);
+			}
+
+			b[0] = 0xC0 | (offset>>8);
+			b[1] = (offset & 0xFF);
+
+			return ndr_push_bytes(ndr, b, 2);
+		}
+
+		complen = strcspn(s, ".");
+
+		/* we need to make sure the length fits into 6 bytes */
+		if (complen >= 0x3F) {
+			return ndr_push_error(ndr, NDR_ERR_STRING,
+					      "component length %u[%08X] > 0x00003F",
+					      (unsigned)complen, (unsigned)complen);
+		}
+
+		compname = talloc_asprintf(ndr, "%c%*.*s",
+						(unsigned char)complen,
+						(unsigned char)complen,
+						(unsigned char)complen, s);
+		NDR_ERR_HAVE_NO_MEMORY(compname);
+
+		/* remember the current componemt + the rest of the string
+		 * so it can be reused later
+		 */
+		NDR_CHECK(ndr_token_store(ndr, &ndr->nbt_string_list, s, ndr->offset));
+
+		/* push just this component into the blob */
+		NDR_CHECK(ndr_push_bytes(ndr, (const uint8_t *)compname, complen+1));
+		talloc_free(compname);
+
+		s += complen;
+		if (*s == '.') s++;
+	}
+
+	/* if we reach the end of the string and have pushed the last component
+	 * without using a label pointer, we need to terminate the string
+	 */
+	return ndr_push_bytes(ndr, (const uint8_t *)"", 1);
+}
+
+
+/*
+  decompress a 'compressed' name component
+ */
+static bool decompress_name(char *name, enum nbt_name_type *type)
+{
+	int i;
+	for (i=0;name[2*i];i++) {
+		uint8_t c1 = name[2*i];
+		uint8_t c2 = name[1+(2*i)];
+		if (c1 < 'A' || c1 > 'P' ||
+		    c2 < 'A' || c2 > 'P') {
+			return false;
+		}
+		name[i] = ((c1-'A')<<4) | (c2-'A');
+	}
+	name[i] = 0;
+	if (i == 16) {
+		*type = (enum nbt_name_type)(name[15]);
+		name[15] = 0;
+		i--;
+	} else {
+		*type = NBT_NAME_CLIENT;
+	}
+
+	/* trim trailing spaces */
+	for (;i>0 && name[i-1]==' ';i--) {
+		name[i-1] = 0;
+	}
+
+	return true;
+}
+
+
+/*
+  compress a name component
+ */
+static uint8_t *compress_name(TALLOC_CTX *mem_ctx,
+			      const uint8_t *name, enum nbt_name_type type)
+{
+	uint8_t *cname;
+	int i;
+	uint8_t pad_char;
+
+	if (strlen((const char *)name) > 15) {
+		return NULL;
+	}
+
+	cname = talloc_array(mem_ctx, uint8_t, 33);
+	if (cname == NULL) return NULL;
+
+	for (i=0;name[i];i++) {
+		cname[2*i]   = 'A' + (name[i]>>4);
+		cname[1+2*i] = 'A' + (name[i]&0xF);
+	}
+	if (strcmp((const char *)name, "*") == 0) {
+		pad_char = 0;
+	} else {
+		pad_char = ' ';
+	}
+	for (;i<15;i++) {
+		cname[2*i]   = 'A' + (pad_char>>4);
+		cname[1+2*i] = 'A' + (pad_char&0xF);
+	}
+
+	pad_char = type;
+	cname[2*i]   = 'A' + (pad_char>>4);
+	cname[1+2*i] = 'A' + (pad_char&0xF);
+
+	cname[32] = 0;
+	return cname;
+}
+
+
+/**
+  pull a nbt name from the wire
+*/
+_PUBLIC_ enum ndr_err_code ndr_pull_nbt_name(struct ndr_pull *ndr, int ndr_flags, struct nbt_name *r)
+{
+	uint8_t *scope;
+	char *cname;
+	const char *s;
+	bool ok;
+
+	if (!(ndr_flags & NDR_SCALARS)) {
+		return NDR_ERR_SUCCESS;
+	}
+
+	NDR_CHECK(ndr_pull_nbt_string(ndr, ndr_flags, &s));
+
+	scope = (uint8_t *)strchr(s, '.');
+	if (scope) {
+		*scope = 0;
+		r->scope = talloc_strdup(ndr->current_mem_ctx, (const char *)&scope[1]);
+		NDR_ERR_HAVE_NO_MEMORY(r->scope);
+	} else {
+		r->scope = NULL;
+	}
+
+	cname = discard_const_p(char, s);
+
+	/* the first component is limited to 16 bytes in the DOS charset,
+	   which is 32 in the 'compressed' form */
+	if (strlen(cname) > 32) {
+		return ndr_pull_error(ndr, NDR_ERR_STRING,
+				      "NBT NAME cname > 32");
+	}
+
+	/* decompress the first component */
+	ok = decompress_name(cname, &r->type);
+	if (!ok) {
+		return ndr_pull_error(ndr, NDR_ERR_STRING,
+				      "NBT NAME failed to decompress");
+	}
+
+	r->name = talloc_strdup(ndr->current_mem_ctx, cname);
+	NDR_ERR_HAVE_NO_MEMORY(r->name);
+
+	talloc_free(cname);
+
+	return NDR_ERR_SUCCESS;
+}
+
+/**
+  push a nbt name to the wire
+*/
+_PUBLIC_ enum ndr_err_code ndr_push_nbt_name(struct ndr_push *ndr, int ndr_flags, const struct nbt_name *r)
+{
+	uint8_t *cname, *fullname;
+	enum ndr_err_code ndr_err;
+
+	if (!(ndr_flags & NDR_SCALARS)) {
+		return NDR_ERR_SUCCESS;
+	}
+
+	if (strlen(r->name) > 15) {
+		return ndr_push_error(ndr, NDR_ERR_STRING,
+				      "nbt_name longer as 15 chars: %s",
+				      r->name);
+	}
+
+	cname = compress_name(ndr, (const uint8_t *)r->name, r->type);
+	NDR_ERR_HAVE_NO_MEMORY(cname);
+
+	if (r->scope) {
+		fullname = (uint8_t *)talloc_asprintf(ndr, "%s.%s", cname, r->scope);
+		NDR_ERR_HAVE_NO_MEMORY(fullname);
+		talloc_free(cname);
+	} else {
+		fullname = cname;
+	}
+
+	ndr_err = ndr_push_nbt_string(ndr, ndr_flags, (const char *)fullname);
+
+	return ndr_err;
+}
+
+
+/**
+  copy a nbt name structure
+*/
+_PUBLIC_ NTSTATUS nbt_name_dup(TALLOC_CTX *mem_ctx, struct nbt_name *name, struct nbt_name *newname)
+{
+	*newname = *name;
+	newname->name = talloc_strdup(mem_ctx, newname->name);
+	NT_STATUS_HAVE_NO_MEMORY(newname->name);
+	newname->scope = talloc_strdup(mem_ctx, newname->scope);
+	if (name->scope) {
+		NT_STATUS_HAVE_NO_MEMORY(newname->scope);
+	}
+	return NT_STATUS_OK;
+}
+
+/**
+  push a nbt name into a blob
+*/
+_PUBLIC_ NTSTATUS nbt_name_to_blob(TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *iconv_convenience, DATA_BLOB *blob, struct nbt_name *name)
+{
+	enum ndr_err_code ndr_err;
+
+	ndr_err = ndr_push_struct_blob(blob, mem_ctx, iconv_convenience, name, (ndr_push_flags_fn_t)ndr_push_nbt_name);
+	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+		return ndr_map_error2ntstatus(ndr_err);
+	}
+
+	return NT_STATUS_OK;
+}
+
+/**
+  pull a nbt name from a blob
+*/
+_PUBLIC_ NTSTATUS nbt_name_from_blob(TALLOC_CTX *mem_ctx, const DATA_BLOB *blob, struct nbt_name *name)
+{
+	enum ndr_err_code ndr_err;
+
+	ndr_err = ndr_pull_struct_blob(blob, mem_ctx, NULL, name,
+				       (ndr_pull_flags_fn_t)ndr_pull_nbt_name);
+	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+		return ndr_map_error2ntstatus(ndr_err);
+	}
+
+	return NT_STATUS_OK;
+}
+
+
+/**
+  choose a name to use when calling a server in a NBT session request.
+  we use heuristics to see if the name we have been given is a IP
+  address, or a too-long name. If it is then use *SMBSERVER, or a
+  truncated name
+*/
+_PUBLIC_ void nbt_choose_called_name(TALLOC_CTX *mem_ctx,
+			    struct nbt_name *n, const char *name, int type)
+{
+	n->scope = NULL;
+	n->type = type;
+
+	if ((name == NULL) || is_ipaddress(name)) {
+		n->name = "*SMBSERVER";
+		return;
+	}
+	if (strlen(name) > 15) {
+		const char *p = strchr(name, '.');
+		char *s;
+		if (p - name > 15) {
+			n->name = "*SMBSERVER";
+			return;
+		}
+		s = talloc_strndup(mem_ctx, name, PTR_DIFF(p, name));
+		n->name = talloc_strdup_upper(mem_ctx, s);
+		return;
+	}
+
+	n->name = talloc_strdup_upper(mem_ctx, name);
+}
+
+
+/*
+  escape a string into a form containing only a small set of characters,
+  the rest is hex encoded. This is similar to URL encoding
+*/
+static const char *nbt_hex_encode(TALLOC_CTX *mem_ctx, const char *s)
+{
+	int i, len;
+	char *ret;
+	const char *valid_chars = "_-.$@ ";
+#define NBT_CHAR_ALLOW(c) (isalnum((unsigned char)c) || strchr(valid_chars, c))
+
+	for (len=i=0;s[i];i++,len++) {
+		if (!NBT_CHAR_ALLOW(s[i])) {
+			len += 2;
+		}
+	}
+
+	ret = talloc_array(mem_ctx, char, len+1);
+	if (ret == NULL) return NULL;
+
+	for (len=i=0;s[i];i++) {
+		if (NBT_CHAR_ALLOW(s[i])) {
+			ret[len++] = s[i];
+		} else {
+			snprintf(&ret[len], 4, "%%%02x", (unsigned char)s[i]);
+			len += 3;
+		}
+	}
+	ret[len] = 0;
+
+	return ret;
+}
+
+
+/**
+  form a string for a NBT name
+*/
+_PUBLIC_ char *nbt_name_string(TALLOC_CTX *mem_ctx, const struct nbt_name *name)
+{
+	TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+	char *ret;
+	if (name->scope) {
+		ret = talloc_asprintf(mem_ctx, "%s<%02x>-%s",
+				      nbt_hex_encode(tmp_ctx, name->name),
+				      name->type,
+				      nbt_hex_encode(tmp_ctx, name->scope));
+	} else {
+		ret = talloc_asprintf(mem_ctx, "%s<%02x>",
+				      nbt_hex_encode(tmp_ctx, name->name),
+				      name->type);
+	}
+	talloc_free(tmp_ctx);
+	return ret;
+}
+
+/**
+  pull a nbt name, WINS Replication uses another on wire format for nbt name
+*/
+_PUBLIC_ enum ndr_err_code ndr_pull_wrepl_nbt_name(struct ndr_pull *ndr, int ndr_flags, const struct nbt_name **_r)
+{
+	struct nbt_name *r;
+	uint8_t *namebuf;
+	uint32_t namebuf_len;
+
+	if (!(ndr_flags & NDR_SCALARS)) {
+		return NDR_ERR_SUCCESS;
+	}
+
+	NDR_CHECK(ndr_pull_align(ndr, 4));
+	NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &namebuf_len));
+	if (namebuf_len < 1 || namebuf_len > 255) {
+		return ndr_pull_error(ndr, NDR_ERR_ALLOC, "value out of range");
+	}
+	NDR_PULL_ALLOC_N(ndr, namebuf, namebuf_len);
+	NDR_CHECK(ndr_pull_array_uint8(ndr, NDR_SCALARS, namebuf, namebuf_len));
+
+	NDR_PULL_ALLOC(ndr, r);
+
+	/* oh wow, what a nasty bug in windows ... */
+	if (namebuf[0] == 0x1b && namebuf_len >= 16) {
+		namebuf[0] = namebuf[15];
+		namebuf[15] = 0x1b;
+	}
+
+	if (namebuf_len < 17) {
+		r->type	= 0x00;
+
+		r->name	= talloc_strndup(r, (char *)namebuf, namebuf_len);
+		if (!r->name) return ndr_pull_error(ndr, NDR_ERR_ALLOC, "out of memory");
+
+		r->scope= NULL;
+
+		talloc_free(namebuf);
+		*_r = r;
+		return NDR_ERR_SUCCESS;
+	}
+
+	r->type = namebuf[15];
+
+	namebuf[15] = '\0';
+	trim_string((char *)namebuf, NULL, " ");
+	r->name = talloc_strdup(r, (char *)namebuf);
+	if (!r->name) return ndr_pull_error(ndr, NDR_ERR_ALLOC, "out of memory");
+
+	if (namebuf_len > 18) {
+		r->scope = talloc_strndup(r, (char *)(namebuf+17), namebuf_len-17);
+		if (!r->scope) return ndr_pull_error(ndr, NDR_ERR_ALLOC, "out of memory");
+	} else {
+		r->scope = NULL;
+	}
+
+	talloc_free(namebuf);
+	*_r = r;
+	return NDR_ERR_SUCCESS;
+}
+
+/**
+  push a nbt name, WINS Replication uses another on wire format for nbt name
+*/
+_PUBLIC_ enum ndr_err_code ndr_push_wrepl_nbt_name(struct ndr_push *ndr, int ndr_flags, const struct nbt_name *r)
+{
+	uint8_t *namebuf;
+	uint32_t namebuf_len;
+	uint32_t _name_len;
+	uint32_t scope_len = 0;
+
+	if (r == NULL) {
+		return ndr_push_error(ndr, NDR_ERR_INVALID_POINTER,
+				      "wrepl_nbt_name NULL pointer");
+	}
+
+	if (!(ndr_flags & NDR_SCALARS)) {
+		return NDR_ERR_SUCCESS;
+	}
+
+	_name_len = strlen(r->name);
+	if (_name_len > 15) {
+		return ndr_push_error(ndr, NDR_ERR_STRING,
+				      "wrepl_nbt_name longer as 15 chars: %s",
+				      r->name);
+	}
+
+	if (r->scope) {
+		scope_len = strlen(r->scope);
+	}
+	if (scope_len > 238) {
+		return ndr_push_error(ndr, NDR_ERR_STRING,
+				      "wrepl_nbt_name scope longer as 238 chars: %s",
+				      r->scope);
+	}
+
+	namebuf = (uint8_t *)talloc_asprintf(ndr, "%-15s%c%s",
+					     r->name, 'X',
+					     (r->scope?r->scope:""));
+	if (!namebuf) return ndr_push_error(ndr, NDR_ERR_ALLOC, "out of memory");
+
+	namebuf_len = strlen((char *)namebuf) + 1;
+
+	/*
+	 * we need to set the type here, and use a place-holder in the talloc_asprintf()
+	 * as the type can be 0x00, and then the namebuf_len = strlen(namebuf); would give wrong results
+	 */
+	namebuf[15] = r->type;
+
+	/* oh wow, what a nasty bug in windows ... */
+	if (r->type == 0x1b) {
+		namebuf[15] = namebuf[0];
+		namebuf[0] = 0x1b;
+	}
+
+	NDR_CHECK(ndr_push_align(ndr, 4));
+	NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, namebuf_len));
+	NDR_CHECK(ndr_push_array_uint8(ndr, NDR_SCALARS, namebuf, namebuf_len));
+
+	talloc_free(namebuf);
+	return NDR_ERR_SUCCESS;
+}
+
+_PUBLIC_ void ndr_print_wrepl_nbt_name(struct ndr_print *ndr, const char *name, const struct nbt_name *r)
+{
+	char *s = nbt_name_string(ndr, r);
+	ndr_print_string(ndr, name, s);
+	talloc_free(s);
+}
+
+_PUBLIC_ enum ndr_err_code ndr_push_nbt_res_rec(struct ndr_push *ndr, int ndr_flags, const struct nbt_res_rec *r)
+{
+	{
+		uint32_t _flags_save_STRUCT = ndr->flags;
+		ndr_set_flags(&ndr->flags, LIBNDR_PRINT_ARRAY_HEX);
+		if (ndr_flags & NDR_SCALARS) {
+			NDR_CHECK(ndr_push_align(ndr, 4));
+			NDR_CHECK(ndr_push_nbt_name(ndr, NDR_SCALARS, &r->name));
+			NDR_CHECK(ndr_push_nbt_qtype(ndr, NDR_SCALARS, r->rr_type));
+			NDR_CHECK(ndr_push_nbt_qclass(ndr, NDR_SCALARS, r->rr_class));
+			NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, r->ttl));
+			NDR_CHECK(ndr_push_set_switch_value(ndr, &r->rdata, ((((r->rr_type) == NBT_QTYPE_NETBIOS) && ((r->rdata).data.length == 2))?0:r->rr_type)));
+			NDR_CHECK(ndr_push_nbt_rdata(ndr, NDR_SCALARS, &r->rdata));
+		}
+		if (ndr_flags & NDR_BUFFERS) {
+		}
+		ndr->flags = _flags_save_STRUCT;
+	}
+	return NDR_ERR_SUCCESS;
+}
diff --git a/libcli/nbt/nbtsocket.c b/libcli/nbt/nbtsocket.c
new file mode 100644
index 0000000000..57531d2e7b
--- /dev/null
+++ b/libcli/nbt/nbtsocket.c
@@ -0,0 +1,521 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   low level socket handling for nbt 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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "lib/events/events.h"
+#include "lib/util/dlinklist.h"
+#include "../libcli/nbt/libnbt.h"
+#include "lib/socket/socket.h"
+#include "librpc/gen_ndr/ndr_nbt.h"
+#include "param/param.h"
+
+#define NBT_MAX_REPLIES 1000
+
+/*
+  destroy a pending request
+*/
+static int nbt_name_request_destructor(struct nbt_name_request *req)
+{
+	if (req->state == NBT_REQUEST_SEND) {
+		DLIST_REMOVE(req->nbtsock->send_queue, req);
+	}
+	if (req->state == NBT_REQUEST_WAIT) {
+		req->nbtsock->num_pending--;
+	}
+	if (req->name_trn_id != 0 && !req->is_reply) {
+		idr_remove(req->nbtsock->idr, req->name_trn_id);
+		req->name_trn_id = 0;
+	}
+	if (req->te) {
+		talloc_free(req->te);
+		req->te = NULL;
+	}
+	if (req->nbtsock->send_queue == NULL) {
+		EVENT_FD_NOT_WRITEABLE(req->nbtsock->fde);
+	}
+	if (req->nbtsock->num_pending == 0 &&
+	    req->nbtsock->incoming.handler == NULL) {
+		EVENT_FD_NOT_READABLE(req->nbtsock->fde);
+	}
+	return 0;
+}
+
+
+/*
+  handle send events on a nbt name socket
+*/
+static void nbt_name_socket_send(struct nbt_name_socket *nbtsock)
+{
+	struct nbt_name_request *req = nbtsock->send_queue;
+	TALLOC_CTX *tmp_ctx = talloc_new(nbtsock);
+	NTSTATUS status;
+
+	while ((req = nbtsock->send_queue)) {
+		size_t len;
+
+		len = req->encoded.length;
+		status = socket_sendto(nbtsock->sock, &req->encoded, &len,
+				       req->dest);
+		if (NT_STATUS_IS_ERR(status)) goto failed;
+
+		if (!NT_STATUS_IS_OK(status)) {
+			talloc_free(tmp_ctx);
+			return;
+		}
+
+		DLIST_REMOVE(nbtsock->send_queue, req);
+		req->state = NBT_REQUEST_WAIT;
+		if (req->is_reply) {
+			talloc_free(req);
+		} else {
+			EVENT_FD_READABLE(nbtsock->fde);
+			nbtsock->num_pending++;
+		}
+	}
+
+	EVENT_FD_NOT_WRITEABLE(nbtsock->fde);
+	talloc_free(tmp_ctx);
+	return;
+
+failed:
+	DLIST_REMOVE(nbtsock->send_queue, req);
+	nbt_name_request_destructor(req);
+	req->status = status;
+	req->state = NBT_REQUEST_ERROR;
+	talloc_free(tmp_ctx);
+	if (req->async.fn) {
+		req->async.fn(req);
+	} else if (req->is_reply) {
+		talloc_free(req);
+	}
+	return;
+}
+
+
+/*
+  handle a request timeout
+*/
+static void nbt_name_socket_timeout(struct event_context *ev, struct timed_event *te,
+				    struct timeval t, void *private)
+{
+	struct nbt_name_request *req = talloc_get_type(private,
+						       struct nbt_name_request);
+
+	if (req->num_retries != 0) {
+		req->num_retries--;
+		req->te = event_add_timed(req->nbtsock->event_ctx, req,
+					  timeval_add(&t, req->timeout, 0),
+					  nbt_name_socket_timeout, req);
+		if (req->state != NBT_REQUEST_SEND) {
+			req->state = NBT_REQUEST_SEND;
+			DLIST_ADD_END(req->nbtsock->send_queue, req,
+				      struct nbt_name_request *);
+		}
+		EVENT_FD_WRITEABLE(req->nbtsock->fde);
+		return;
+	}
+
+	nbt_name_request_destructor(req);
+	if (req->num_replies == 0) {
+		req->state = NBT_REQUEST_TIMEOUT;
+		req->status = NT_STATUS_IO_TIMEOUT;
+	} else {
+		req->state = NBT_REQUEST_DONE;
+		req->status = NT_STATUS_OK;
+	}
+	if (req->async.fn) {
+		req->async.fn(req);
+	} else if (req->is_reply) {
+		talloc_free(req);
+	}
+}
+
+
+
+/**
+  handle recv events on a nbt name socket
+*/
+static void nbt_name_socket_recv(struct nbt_name_socket *nbtsock)
+{
+	TALLOC_CTX *tmp_ctx = talloc_new(nbtsock);
+	NTSTATUS status;
+	enum ndr_err_code ndr_err;
+	struct socket_address *src;
+	DATA_BLOB blob;
+	size_t nread, dsize;
+	struct nbt_name_packet *packet;
+	struct nbt_name_request *req;
+
+	status = socket_pending(nbtsock->sock, &dsize);
+	if (!NT_STATUS_IS_OK(status)) {
+		talloc_free(tmp_ctx);
+		return;
+	}
+
+	blob = data_blob_talloc(tmp_ctx, NULL, dsize);
+	if (blob.data == NULL) {
+		talloc_free(tmp_ctx);
+		return;
+	}
+
+	status = socket_recvfrom(nbtsock->sock, blob.data, blob.length, &nread,
+				 tmp_ctx, &src);
+	if (!NT_STATUS_IS_OK(status)) {
+		talloc_free(tmp_ctx);
+		return;
+	}
+
+	packet = talloc(tmp_ctx, struct nbt_name_packet);
+	if (packet == NULL) {
+		talloc_free(tmp_ctx);
+		return;
+	}
+
+	/* parse the request */
+	ndr_err = ndr_pull_struct_blob(&blob, packet, nbtsock->iconv_convenience, packet,
+				       (ndr_pull_flags_fn_t)ndr_pull_nbt_name_packet);
+	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+		status = ndr_map_error2ntstatus(ndr_err);
+		DEBUG(2,("Failed to parse incoming NBT name packet - %s\n",
+			 nt_errstr(status)));
+		talloc_free(tmp_ctx);
+		return;
+	}
+
+	if (DEBUGLVL(10)) {
+		DEBUG(10,("Received nbt packet of length %d from %s:%d\n",
+			  (int)blob.length, src->addr, src->port));
+		NDR_PRINT_DEBUG(nbt_name_packet, packet);
+	}
+
+	/* if its not a reply then pass it off to the incoming request
+	   handler, if any */
+	if (!(packet->operation & NBT_FLAG_REPLY)) {
+		if (nbtsock->incoming.handler) {
+			nbtsock->incoming.handler(nbtsock, packet, src);
+		}
+		talloc_free(tmp_ctx);
+		return;
+	}
+
+	/* find the matching request */
+	req = (struct nbt_name_request *)idr_find(nbtsock->idr,
+						  packet->name_trn_id);
+	if (req == NULL) {
+		if (nbtsock->unexpected.handler) {
+			nbtsock->unexpected.handler(nbtsock, packet, src);
+		} else {
+			DEBUG(10,("Failed to match request for incoming name packet id 0x%04x on %p\n",
+				 packet->name_trn_id, nbtsock));
+		}
+		talloc_free(tmp_ctx);
+		return;
+	}
+
+	/* if this is a WACK response, this we need to go back to waiting,
+	   but perhaps increase the timeout */
+	if ((packet->operation & NBT_OPCODE) == NBT_OPCODE_WACK) {
+		if (req->received_wack || packet->ancount < 1) {
+			nbt_name_request_destructor(req);
+			req->status = NT_STATUS_INVALID_NETWORK_RESPONSE;
+			req->state  = NBT_REQUEST_ERROR;
+			goto done;
+		}
+		talloc_free(req->te);
+		/* we know we won't need any more retries - the server
+		   has received our request */
+		req->num_retries   = 0;
+		req->received_wack = true;
+		/* although there can be a timeout in the packet, w2k3 screws it up,
+		   so better to set it ourselves */
+		req->timeout = lp_parm_int(global_loadparm, NULL, "nbt", "wack_timeout", 30);
+		req->te = event_add_timed(req->nbtsock->event_ctx, req,
+					  timeval_current_ofs(req->timeout, 0),
+					  nbt_name_socket_timeout, req);
+		talloc_free(tmp_ctx);
+		return;
+	}
+
+
+	req->replies = talloc_realloc(req, req->replies, struct nbt_name_reply, req->num_replies+1);
+	if (req->replies == NULL) {
+		nbt_name_request_destructor(req);
+		req->state  = NBT_REQUEST_ERROR;
+		req->status = NT_STATUS_NO_MEMORY;
+		goto done;
+	}
+
+	talloc_steal(req, src);
+	req->replies[req->num_replies].dest   = src;
+	talloc_steal(req, packet);
+	req->replies[req->num_replies].packet = packet;
+	req->num_replies++;
+
+	/* if we don't want multiple replies then we are done */
+	if (req->allow_multiple_replies &&
+	    req->num_replies < NBT_MAX_REPLIES) {
+		talloc_free(tmp_ctx);
+		return;
+	}
+
+	nbt_name_request_destructor(req);
+	req->state  = NBT_REQUEST_DONE;
+	req->status = NT_STATUS_OK;
+
+done:
+	talloc_free(tmp_ctx);
+	if (req->async.fn) {
+		req->async.fn(req);
+	}
+}
+
+/*
+  handle fd events on a nbt_name_socket
+*/
+static void nbt_name_socket_handler(struct event_context *ev, struct fd_event *fde,
+				    uint16_t flags, void *private)
+{
+	struct nbt_name_socket *nbtsock = talloc_get_type(private,
+							  struct nbt_name_socket);
+	if (flags & EVENT_FD_WRITE) {
+		nbt_name_socket_send(nbtsock);
+	}
+	if (flags & EVENT_FD_READ) {
+		nbt_name_socket_recv(nbtsock);
+	}
+}
+
+
+/*
+  initialise a nbt_name_socket. The event_ctx is optional, if provided
+  then operations will use that event context
+*/
+_PUBLIC_ struct nbt_name_socket *nbt_name_socket_init(TALLOC_CTX *mem_ctx,
+					     struct event_context *event_ctx,
+					     struct smb_iconv_convenience *iconv_convenience)
+{
+	struct nbt_name_socket *nbtsock;
+	NTSTATUS status;
+
+	nbtsock = talloc(mem_ctx, struct nbt_name_socket);
+	if (nbtsock == NULL) goto failed;
+
+	nbtsock->event_ctx = talloc_reference(nbtsock, event_ctx);
+	if (nbtsock->event_ctx == NULL) goto failed;
+
+	status = socket_create("ip", SOCKET_TYPE_DGRAM, &nbtsock->sock, 0);
+	if (!NT_STATUS_IS_OK(status)) goto failed;
+
+	socket_set_option(nbtsock->sock, "SO_BROADCAST", "1");
+
+	talloc_steal(nbtsock, nbtsock->sock);
+
+	nbtsock->idr = idr_init(nbtsock);
+	if (nbtsock->idr == NULL) goto failed;
+
+	nbtsock->send_queue = NULL;
+	nbtsock->num_pending = 0;
+	nbtsock->incoming.handler = NULL;
+	nbtsock->unexpected.handler = NULL;
+	nbtsock->iconv_convenience = iconv_convenience;
+
+	nbtsock->fde = event_add_fd(nbtsock->event_ctx, nbtsock,
+				    socket_get_fd(nbtsock->sock), 0,
+				    nbt_name_socket_handler, nbtsock);
+
+	return nbtsock;
+
+failed:
+	talloc_free(nbtsock);
+	return NULL;
+}
+
+/*
+  send off a nbt name request
+*/
+struct nbt_name_request *nbt_name_request_send(struct nbt_name_socket *nbtsock,
+					       struct socket_address *dest,
+					       struct nbt_name_packet *request,
+					       int timeout, int retries,
+					       bool allow_multiple_replies)
+{
+	struct nbt_name_request *req;
+	int id;
+	enum ndr_err_code ndr_err;
+
+	req = talloc_zero(nbtsock, struct nbt_name_request);
+	if (req == NULL) goto failed;
+
+	req->nbtsock                = nbtsock;
+	req->allow_multiple_replies = allow_multiple_replies;
+	req->state                  = NBT_REQUEST_SEND;
+	req->is_reply               = false;
+	req->timeout                = timeout;
+	req->num_retries            = retries;
+	req->dest                   = dest;
+	if (talloc_reference(req, dest) == NULL) goto failed;
+
+	/* we select a random transaction id unless the user supplied one */
+	if (request->name_trn_id == 0) {
+		id = idr_get_new_random(req->nbtsock->idr, req, UINT16_MAX);
+	} else {
+		if (idr_find(req->nbtsock->idr, request->name_trn_id)) goto failed;
+		id = idr_get_new_above(req->nbtsock->idr, req, request->name_trn_id,
+				       UINT16_MAX);
+	}
+	if (id == -1) goto failed;
+
+	request->name_trn_id = id;
+	req->name_trn_id     = id;
+
+	req->te = event_add_timed(nbtsock->event_ctx, req,
+				  timeval_current_ofs(req->timeout, 0),
+				  nbt_name_socket_timeout, req);
+
+	talloc_set_destructor(req, nbt_name_request_destructor);
+
+	ndr_err = ndr_push_struct_blob(&req->encoded, req,
+				       req->nbtsock->iconv_convenience,
+				       request,
+				       (ndr_push_flags_fn_t)ndr_push_nbt_name_packet);
+	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) goto failed;
+
+	DLIST_ADD_END(nbtsock->send_queue, req, struct nbt_name_request *);
+
+	if (DEBUGLVL(10)) {
+		DEBUG(10,("Queueing nbt packet to %s:%d\n",
+			  req->dest->addr, req->dest->port));
+		NDR_PRINT_DEBUG(nbt_name_packet, request);
+	}
+
+	EVENT_FD_WRITEABLE(nbtsock->fde);
+
+	return req;
+
+failed:
+	talloc_free(req);
+	return NULL;
+}
+
+
+/*
+  send off a nbt name reply
+*/
+_PUBLIC_ NTSTATUS nbt_name_reply_send(struct nbt_name_socket *nbtsock,
+			     struct socket_address *dest,
+			     struct nbt_name_packet *request)
+{
+	struct nbt_name_request *req;
+	enum ndr_err_code ndr_err;
+
+	req = talloc_zero(nbtsock, struct nbt_name_request);
+	NT_STATUS_HAVE_NO_MEMORY(req);
+
+	req->nbtsock   = nbtsock;
+	req->dest = dest;
+	if (talloc_reference(req, dest) == NULL) goto failed;
+	req->state     = NBT_REQUEST_SEND;
+	req->is_reply = true;
+
+	talloc_set_destructor(req, nbt_name_request_destructor);
+
+	if (DEBUGLVL(10)) {
+		NDR_PRINT_DEBUG(nbt_name_packet, request);
+	}
+
+	ndr_err = ndr_push_struct_blob(&req->encoded, req,
+				       req->nbtsock->iconv_convenience,
+				       request,
+				       (ndr_push_flags_fn_t)ndr_push_nbt_name_packet);
+	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+		talloc_free(req);
+		return ndr_map_error2ntstatus(ndr_err);
+	}
+
+	DLIST_ADD_END(nbtsock->send_queue, req, struct nbt_name_request *);
+
+	EVENT_FD_WRITEABLE(nbtsock->fde);
+
+	return NT_STATUS_OK;
+
+failed:
+	talloc_free(req);
+	return NT_STATUS_NO_MEMORY;
+}
+
+/*
+  wait for a nbt request to complete
+*/
+NTSTATUS nbt_name_request_recv(struct nbt_name_request *req)
+{
+	if (!req) return NT_STATUS_NO_MEMORY;
+
+	while (req->state < NBT_REQUEST_DONE) {
+		if (event_loop_once(req->nbtsock->event_ctx) != 0) {
+			req->state = NBT_REQUEST_ERROR;
+			req->status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
+			break;
+		}
+	}
+	return req->status;
+}
+
+
+/*
+  setup a handler for incoming requests
+*/
+_PUBLIC_ NTSTATUS nbt_set_incoming_handler(struct nbt_name_socket *nbtsock,
+				  void (*handler)(struct nbt_name_socket *, struct nbt_name_packet *,
+						  struct socket_address *),
+				  void *private)
+{
+	nbtsock->incoming.handler = handler;
+	nbtsock->incoming.private_data = private;
+	EVENT_FD_READABLE(nbtsock->fde);
+	return NT_STATUS_OK;
+}
+
+
+/*
+  turn a NBT rcode into a NTSTATUS
+*/
+_PUBLIC_ NTSTATUS nbt_rcode_to_ntstatus(uint8_t rcode)
+{
+	int i;
+	struct {
+		enum nbt_rcode rcode;
+		NTSTATUS status;
+	} map[] = {
+		{ NBT_RCODE_FMT, NT_STATUS_INVALID_PARAMETER },
+		{ NBT_RCODE_SVR, NT_STATUS_SERVER_DISABLED },
+		{ NBT_RCODE_NAM, NT_STATUS_OBJECT_NAME_NOT_FOUND },
+		{ NBT_RCODE_IMP, NT_STATUS_NOT_SUPPORTED },
+		{ NBT_RCODE_RFS, NT_STATUS_ACCESS_DENIED },
+		{ NBT_RCODE_ACT, NT_STATUS_ADDRESS_ALREADY_EXISTS },
+		{ NBT_RCODE_CFT, NT_STATUS_CONFLICTING_ADDRESSES }
+	};
+	for (i=0;i<ARRAY_SIZE(map);i++) {
+		if (map[i].rcode == rcode) {
+			return map[i].status;
+		}
+	}
+	return NT_STATUS_UNSUCCESSFUL;
+}
diff --git a/libcli/nbt/pynbt.c b/libcli/nbt/pynbt.c
new file mode 100644
index 0000000000..e49c1776a3
--- /dev/null
+++ b/libcli/nbt/pynbt.c
@@ -0,0 +1,408 @@
+/*
+   Unix SMB/CIFS implementation.
+   Samba utility functions
+   Copyright © Jelmer Vernooij <jelmer@samba.org> 2008
+
+   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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include <Python.h>
+#include "libcli/util/pyerrors.h"
+#include "../libcli/nbt/libnbt.h"
+#include "lib/events/events.h"
+#include "param/param.h"
+
+PyAPI_DATA(PyTypeObject) nbt_node_Type;
+
+typedef struct {
+	PyObject_HEAD
+	TALLOC_CTX *mem_ctx;
+	struct nbt_name_socket *socket;
+} nbt_node_Object;
+
+static void py_nbt_node_dealloc(PyObject *obj)
+{
+	talloc_free(((nbt_node_Object *)obj)->mem_ctx);
+	PyObject_Del(obj);
+}
+
+static PyObject *py_nbt_node_init(PyTypeObject *self, PyObject *args, PyObject *kwargs)
+{
+	struct event_context *ev;
+	nbt_node_Object *ret = PyObject_New(nbt_node_Object, &nbt_node_Type);
+
+	ret->mem_ctx = talloc_new(NULL);
+	if (ret->mem_ctx == NULL)
+		return NULL;
+
+	ev = s4_event_context_init(ret->mem_ctx);
+	ret->socket = nbt_name_socket_init(ret->mem_ctx, ev, lp_iconv_convenience(global_loadparm));
+	return (PyObject *)ret;
+}
+
+static bool PyObject_AsDestinationTuple(PyObject *obj, const char **dest_addr, uint16_t *dest_port)
+{
+	if (PyString_Check(obj)) {
+		*dest_addr = PyString_AsString(obj);
+		*dest_port = NBT_NAME_SERVICE_PORT;
+		return true;
+	}
+
+	if (PyTuple_Check(obj)) {
+		if (PyTuple_Size(obj) < 1) {
+			PyErr_SetString(PyExc_TypeError, "Destination tuple size invalid");
+			return false;
+		}
+
+		if (!PyString_Check(PyTuple_GetItem(obj, 0))) {
+			PyErr_SetString(PyExc_TypeError, "Destination tuple first element not string");
+			return false;
+		}
+
+		*dest_addr = PyString_AsString(obj);
+
+		if (PyTuple_Size(obj) == 1) {
+			*dest_port = NBT_NAME_SERVICE_PORT;
+			return true;
+		} else if (PyInt_Check(PyTuple_GetItem(obj, 1))) {
+			*dest_port = PyInt_AsLong(PyTuple_GetItem(obj, 1));
+			return true;
+		} else {
+			PyErr_SetString(PyExc_TypeError, "Destination tuple second element not a port");
+			return false;
+		}
+	}
+
+	PyErr_SetString(PyExc_TypeError, "Destination tuple second element not a port");
+	return false;
+}
+
+static bool PyObject_AsNBTName(PyObject *obj, struct nbt_name_socket *socket, struct nbt_name *name)
+{
+	if (PyTuple_Check(obj)) {
+		if (PyTuple_Size(obj) == 2) {
+			name->name = PyString_AsString(PyTuple_GetItem(obj, 0));
+			name->type = PyInt_AsLong(PyTuple_GetItem(obj, 1));
+			name->scope = NULL;
+			return true;
+		} else if (PyTuple_Size(obj) == 3) {
+			name->name = PyString_AsString(PyTuple_GetItem(obj, 0));
+			name->scope = PyString_AsString(PyTuple_GetItem(obj, 1));
+			name->type = PyInt_AsLong(PyTuple_GetItem(obj, 2));
+			return true;
+		} else {
+			PyErr_SetString(PyExc_TypeError, "Invalid tuple size");
+			return false;
+		}
+	}
+
+	if (PyString_Check(obj)) {
+		/* FIXME: Parse string to be able to interpret things like RHONWYN<02> ? */
+		name->name = PyString_AsString(obj);
+		name->scope = NULL;
+		name->type = 0;
+		return true;
+	}
+
+	PyErr_SetString(PyExc_TypeError, "Invalid type for object");
+	return false;
+}
+
+static PyObject *PyObject_FromNBTName(struct nbt_name_socket *socket, struct smb_iconv_convenience *ic,
+				      struct nbt_name *name)
+{
+	if (name->scope) {
+		return Py_BuildValue("(ssi)", name->name, name->scope, name->type);
+	} else {
+		return Py_BuildValue("(si)", name->name, name->type);
+	}
+}
+
+static PyObject *py_nbt_name_query(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+	nbt_node_Object *node = (nbt_node_Object *)self;
+	PyObject *ret, *reply_addrs, *py_dest, *py_name;
+	struct nbt_name_query io;
+	NTSTATUS status;
+	int i;
+
+	const char *kwnames[] = { "name", "dest", "broadcast", "wins", "timeout",
+				  "retries", NULL };
+	io.in.broadcast = true;
+	io.in.wins_lookup = false;
+	io.in.timeout = 0;
+	io.in.retries = 3;
+
+	if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OO|bbii:query_name",
+					 discard_const_p(char *, kwnames),
+					 &py_name, &py_dest,
+					 &io.in.broadcast, &io.in.wins_lookup,
+					 &io.in.timeout, &io.in.retries)) {
+		return NULL;
+	}
+
+	if (!PyObject_AsDestinationTuple(py_dest, &io.in.dest_addr, &io.in.dest_port))
+		return NULL;
+
+	if (!PyObject_AsNBTName(py_name, node->socket, &io.in.name))
+		return NULL;
+
+	status = nbt_name_query(node->socket, NULL, &io);
+
+	if (NT_STATUS_IS_ERR(status)) {
+		PyErr_SetNTSTATUS(status);
+		return NULL;
+	}
+
+	ret = PyTuple_New(3);
+	if (ret == NULL)
+		return NULL;
+	PyTuple_SetItem(ret, 0, PyString_FromString(io.out.reply_from));
+
+	py_name = PyObject_FromNBTName(node->socket, lp_iconv_convenience(global_loadparm), &io.out.name);
+	if (py_name == NULL)
+		return NULL;
+
+	PyTuple_SetItem(ret, 1, py_name);
+
+	reply_addrs = PyList_New(io.out.num_addrs);
+	if (reply_addrs == NULL) {
+		Py_DECREF(ret);
+		return NULL;
+	}
+
+	for (i = 0; i < io.out.num_addrs; i++) {
+		PyList_SetItem(reply_addrs, i, PyString_FromString(io.out.reply_addrs[i]));
+	}
+
+	PyTuple_SetItem(ret, 2, reply_addrs);
+	return ret;
+}
+
+static PyObject *py_nbt_name_status(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+	nbt_node_Object *node = (nbt_node_Object *)self;
+	PyObject *ret, *py_dest, *py_name, *py_names;
+	struct nbt_name_status io;
+	int i;
+	NTSTATUS status;
+
+	const char *kwnames[] = { "name", "dest", "timeout", "retries", NULL };
+
+	io.in.timeout = 0;
+	io.in.retries = 0;
+
+	if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OO|ii:name_status",
+					 discard_const_p(char *, kwnames),
+					 &py_name, &py_dest,
+					 &io.in.timeout, &io.in.retries)) {
+		return NULL;
+	}
+
+	if (!PyObject_AsDestinationTuple(py_dest, &io.in.dest_addr, &io.in.dest_port))
+		return NULL;
+
+	if (!PyObject_AsNBTName(py_name, node->socket, &io.in.name))
+		return NULL;
+
+	status = nbt_name_status(node->socket, NULL, &io);
+
+	if (NT_STATUS_IS_ERR(status)) {
+		PyErr_SetNTSTATUS(status);
+		return NULL;
+	}
+
+	ret = PyTuple_New(3);
+	if (ret == NULL)
+		return NULL;
+	PyTuple_SetItem(ret, 0, PyString_FromString(io.out.reply_from));
+
+	py_name = PyObject_FromNBTName(node->socket, lp_iconv_convenience(global_loadparm), &io.out.name);
+	if (py_name == NULL)
+		return NULL;
+
+	PyTuple_SetItem(ret, 1, py_name);
+
+	py_names = PyList_New(io.out.status.num_names);
+
+	for (i = 0; i < io.out.status.num_names; i++) {
+		PyList_SetItem(py_names, i, Py_BuildValue("(sii)",
+				io.out.status.names[i].name,
+				io.out.status.names[i].nb_flags,
+				io.out.status.names[i].type));
+	}
+
+	PyTuple_SetItem(ret, 2, py_names);
+
+	return ret;
+}
+
+static PyObject *py_nbt_name_register(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+	nbt_node_Object *node = (nbt_node_Object *)self;
+	PyObject *ret, *py_dest, *py_name;
+	struct nbt_name_register io;
+	NTSTATUS status;
+
+	const char *kwnames[] = { "name", "address", "dest", "register_demand", "broadcast",
+		                  "multi_homed", "ttl", "timeout", "retries", NULL };
+
+	io.in.broadcast = true;
+	io.in.multi_homed = true;
+	io.in.register_demand = true;
+	io.in.timeout = 0;
+	io.in.retries = 0;
+
+	if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OsO|bbbiii:query_name",
+					 discard_const_p(char *, kwnames),
+					 &py_name, &io.in.address, &py_dest,
+					 &io.in.register_demand,
+					 &io.in.broadcast, &io.in.multi_homed,
+					 &io.in.ttl, &io.in.timeout, &io.in.retries)) {
+		return NULL;
+	}
+
+	if (!PyObject_AsDestinationTuple(py_dest, &io.in.dest_addr, &io.in.dest_port))
+		return NULL;
+
+	if (!PyObject_AsNBTName(py_name, node->socket, &io.in.name))
+		return NULL;
+
+	status = nbt_name_register(node->socket, NULL, &io);
+
+	if (NT_STATUS_IS_ERR(status)) {
+		PyErr_SetNTSTATUS(status);
+		return NULL;
+	}
+
+	ret = PyTuple_New(3);
+	if (ret == NULL)
+		return NULL;
+	PyTuple_SetItem(ret, 0, PyString_FromString(io.out.reply_from));
+
+	py_name = PyObject_FromNBTName(node->socket, lp_iconv_convenience(global_loadparm), &io.out.name);
+	if (py_name == NULL)
+		return NULL;
+
+	PyTuple_SetItem(ret, 1, py_name);
+
+	PyTuple_SetItem(ret, 2, PyString_FromString(io.out.reply_addr));
+
+	PyTuple_SetItem(ret, 3, PyInt_FromLong(io.out.rcode));
+
+	return ret;
+}
+
+static PyObject *py_nbt_name_refresh(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+	nbt_node_Object *node = (nbt_node_Object *)self;
+	PyObject *ret, *py_dest, *py_name;
+	struct nbt_name_refresh io;
+	NTSTATUS status;
+
+	const char *kwnames[] = { "name", "address", "dest", "nb_flags", "broadcast",
+		                  "ttl", "timeout", "retries", NULL };
+
+	io.in.broadcast = true;
+	io.in.nb_flags = 0;
+	io.in.timeout = 0;
+	io.in.retries = 0;
+
+	if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OsO|ibiii:query_name",
+					 discard_const_p(char *, kwnames),
+					 &py_name, &io.in.address, &py_dest,
+					 &io.in.nb_flags,
+					 &io.in.broadcast,
+					 &io.in.ttl, &io.in.timeout, &io.in.retries)) {
+		return NULL;
+	}
+
+	if (!PyObject_AsDestinationTuple(py_dest, &io.in.dest_addr, &io.in.dest_port))
+		return NULL;
+
+	if (!PyObject_AsNBTName(py_name, node->socket, &io.in.name))
+		return NULL;
+
+	status = nbt_name_refresh(node->socket, NULL, &io);
+
+	if (NT_STATUS_IS_ERR(status)) {
+		PyErr_SetNTSTATUS(status);
+		return NULL;
+	}
+
+	ret = PyTuple_New(3);
+	if (ret == NULL)
+		return NULL;
+	PyTuple_SetItem(ret, 0, PyString_FromString(io.out.reply_from));
+
+	py_name = PyObject_FromNBTName(node->socket, lp_iconv_convenience(global_loadparm), &io.out.name);
+	if (py_name == NULL)
+		return NULL;
+
+	PyTuple_SetItem(ret, 1, py_name);
+
+	PyTuple_SetItem(ret, 2, PyString_FromString(io.out.reply_addr));
+
+	PyTuple_SetItem(ret, 3, PyInt_FromLong(io.out.rcode));
+
+	return ret;
+}
+
+static PyObject *py_nbt_name_release(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+	return Py_None; /* FIXME */
+}
+
+static PyMethodDef py_nbt_methods[] = {
+	{ "query_name", (PyCFunction)py_nbt_name_query, METH_VARARGS|METH_KEYWORDS,
+		"S.query_name(name, dest, broadcast=True, wins=False, timeout=0, retries=3) -> (reply_from, name, reply_addr)\n"
+		"Query for a NetBIOS name" },
+	{ "register_name", (PyCFunction)py_nbt_name_register, METH_VARARGS|METH_KEYWORDS,
+		"S.register_name(name, address, dest, register_demand=True, broadcast=True, multi_homed=True, ttl=0, timeout=0, retries=0) -> (reply_from, name, reply_addr, rcode)\n"
+		"Register a new name" },
+	{ "release_name", (PyCFunction)py_nbt_name_release, METH_VARARGS|METH_KEYWORDS, "S.release_name(name, address, dest, nb_flags=0, broadcast=true, timeout=0, retries=3) -> (reply_from, name, reply_addr, rcode)\n"
+		"release a previously registered name" },
+	{ "refresh_name", (PyCFunction)py_nbt_name_refresh, METH_VARARGS|METH_KEYWORDS, "S.refresh_name(name, address, dest, nb_flags=0, broadcast=True, ttl=0, timeout=0, retries=0) -> (reply_from, name, reply_addr, rcode)\n"
+		"release a previously registered name" },
+	{ "name_status", (PyCFunction)py_nbt_name_status, METH_VARARGS|METH_KEYWORDS,
+		"S.name_status(name, dest, timeout=0, retries=0) -> (reply_from, name, status)\n"
+		"Find the status of a name" },
+
+	{ NULL }
+};
+
+PyTypeObject nbt_node_Type = {
+	PyObject_HEAD_INIT(NULL) 0,
+	.tp_name = "netbios.Node",
+	.tp_basicsize = sizeof(nbt_node_Object),
+	.tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE,
+	.tp_new = py_nbt_node_init,
+	.tp_dealloc = py_nbt_node_dealloc,
+	.tp_methods = py_nbt_methods,
+	.tp_doc = "Node()\n"
+		  "Create a new NetBIOS node\n"
+};
+
+void initnetbios(void)
+{
+	PyObject *mod;
+	if (PyType_Ready(&nbt_node_Type) < 0)
+		return;
+
+	mod = Py_InitModule3("netbios", NULL, "NetBIOS over TCP/IP support");
+
+	Py_INCREF((PyObject *)&nbt_node_Type);
+	PyModule_AddObject(mod, "Node", (PyObject *)&nbt_node_Type);
+}