r4891: - added a generic resolve_name() async interface in libcli/resolve/,

   which will eventually try all resolution methods setup in smb.conf

 - only resolution backend at the moment is bcast, which does a
   parallel broadcast to all configured network interfaces, and takes
   the first reply that comes in (this nicely demonstrates how to do
   parallel requests using the async APIs)

 - converted all the existing code to use the new resolve_name() api

 - removed all the old nmb code (yay!)
(This used to be commit 239c310f255e43dd2d1c2433f666c9faaacbdce3)

1 files changed, 163 insertions, 0 deletions

diff --git a/source4/libcli/resolve/bcast.c b/source4/libcli/resolve/bcast.c
new file mode 100644
index 0000000000..b2d37fbfbb
--- /dev/null
+++ b/source4/libcli/resolve/bcast.c
@@ -0,0 +1,163 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   broadcast name resolution module
+
+   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 "system/network.h"
+#include "libcli/raw/libcliraw.h"
+#include "libcli/nbt/libnbt.h"
+#include "libcli/composite/composite.h"
+
+struct bcast_state {
+	struct nbt_name name;
+	struct nbt_name_socket *nbtsock;
+	int num_queries;
+	struct nbt_name_request **queries;
+	struct nbt_name_query *io_queries;
+	const char *reply_addr;
+};
+
+/*
+  handle events during broadcast name resolution
+*/
+static void bcast_handler(struct nbt_name_request *req)
+{
+	struct smbcli_composite *c = talloc_get_type(req->async.private, 
+						     struct smbcli_composite);
+	struct bcast_state *state = talloc_get_type(c->private, struct bcast_state);
+	int i;
+
+	for (i=0;i<state->num_queries;i++) {
+		if (req == state->queries[i]) break;
+	}
+	if (i == state->num_queries) {
+		/* not for us?! */
+		c->status = NT_STATUS_INTERNAL_ERROR;
+		c->state = SMBCLI_REQUEST_ERROR;		
+		goto done;
+	} 
+
+	c->status = nbt_name_query_recv(req, state, &state->io_queries[i]);
+	if (!NT_STATUS_IS_OK(c->status)) {
+		c->state = SMBCLI_REQUEST_ERROR;
+	} else {
+		c->state = SMBCLI_REQUEST_DONE;
+		state->reply_addr = talloc_steal(state, state->io_queries[i].out.reply_addr);
+	}
+
+done:
+	talloc_free(state->nbtsock);
+	if (c->async.fn) {
+		c->async.fn(c);
+	}
+}
+
+/*
+  broadcast name resolution method - async send
+ */
+struct smbcli_composite *resolve_name_bcast_send(struct nbt_name *name, 
+						 struct event_context *event_ctx)
+{
+	struct smbcli_composite *c;
+	struct bcast_state *state;
+	int i;
+	NTSTATUS status;
+
+	c = talloc_zero(NULL, struct smbcli_composite);
+	if (c == NULL) goto failed;
+
+	state = talloc(c, struct bcast_state);
+	if (state == NULL) goto failed;
+
+	status = nbt_name_dup(state, name, &state->name);
+	if (!NT_STATUS_IS_OK(status)) goto failed;
+
+	state->nbtsock = nbt_name_socket_init(state, event_ctx);
+	if (state->nbtsock == NULL) goto failed;
+
+	state->num_queries = iface_count();
+
+	state->io_queries = talloc_array(state, struct nbt_name_query, state->num_queries);
+	if (!state->io_queries) goto failed;
+
+	state->queries = talloc_array(state, struct nbt_name_request *, state->num_queries);
+	if (!state->queries) goto failed;
+
+	for (i=0;i<state->num_queries;i++) {
+		struct ipv4_addr *ip = iface_n_bcast(i);
+		const char *addr = sys_inet_ntoa(*ip);
+		if (!addr) goto failed;
+
+		state->io_queries[i].in.name = state->name;
+		state->io_queries[i].in.dest_addr = talloc_strdup(state->io_queries, addr);
+		if (!state->io_queries[i].in.dest_addr) goto failed;
+		state->io_queries[i].in.broadcast = True;
+		state->io_queries[i].in.wins_lookup = False;
+		state->io_queries[i].in.timeout = lp_parm_int(-1, "nbt", "bcastTimeout", 5);
+
+		state->queries[i] = nbt_name_query_send(state->nbtsock, &state->io_queries[i]);
+		if (!state->queries[i]) goto failed;
+
+		state->queries[i]->async.fn = bcast_handler;
+		state->queries[i]->async.private = c;
+	}
+
+	c->state = SMBCLI_REQUEST_SEND;
+	c->private = state;
+	c->event_ctx = state->nbtsock->event_ctx;
+
+	return c;
+
+failed:
+	talloc_free(c);
+	return NULL;
+}
+
+/*
+  broadcast name resolution method - recv side
+ */
+NTSTATUS resolve_name_bcast_recv(struct smbcli_composite *c, 
+				 TALLOC_CTX *mem_ctx, const char **reply_addr)
+{
+	NTSTATUS status;
+
+	status = smb_composite_wait(c);
+
+	if (NT_STATUS_IS_OK(status)) {
+		struct bcast_state *state = talloc_get_type(c->private, struct bcast_state);
+		*reply_addr = talloc_steal(mem_ctx, state->reply_addr);
+	}
+
+	talloc_free(c);
+	return status;
+}
+
+/*
+  broadcast name resolution method - sync call
+ */
+NTSTATUS resolve_name_bcast(struct nbt_name *name, 
+			    TALLOC_CTX *mem_ctx,
+			    const char **reply_addr)
+{
+	struct smbcli_composite *c = resolve_name_bcast_send(name, NULL);
+	return resolve_name_bcast_recv(c, mem_ctx, reply_addr);
+}
+