1 files changed, 225 insertions, 0 deletions
diff --git a/source4/libcli/resolve/resolve.c b/source4/libcli/resolve/resolve.c
new file mode 100644
index 0000000000..d89b50e430
--- /dev/null
+++ b/source4/libcli/resolve/resolve.c
@@ -0,0 +1,225 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   general name resolution interface
+
+   Copyright (C) Andrew Tridgell 2005
+   Copyright (C) Jelmer Vernooij 2007
+   
+   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 "libcli/composite/composite.h"
+#include "libcli/resolve/resolve.h"
+#include "librpc/gen_ndr/ndr_nbt.h"
+#include "param/param.h"
+#include "system/network.h"
+#include "util/dlinklist.h"
+
+struct resolve_state {
+	struct resolve_context *ctx;
+	struct resolve_method *method;
+	struct nbt_name name;
+	struct composite_context *creq;
+	const char *reply_addr;
+};
+
+static struct composite_context *setup_next_method(struct composite_context *c);
+
+
+struct resolve_context {
+	struct resolve_method {
+		resolve_name_send_fn send_fn;
+		resolve_name_recv_fn recv_fn;
+		void *privdata;
+		struct resolve_method *prev, *next;
+	} *methods;
+};
+
+/**
+ * Initialize a resolve context
+ */
+struct resolve_context *resolve_context_init(TALLOC_CTX *mem_ctx)
+{
+	return talloc_zero(mem_ctx, struct resolve_context);
+}
+
+/**
+ * Add a resolve method
+ */
+bool resolve_context_add_method(struct resolve_context *ctx, resolve_name_send_fn send_fn, 
+				resolve_name_recv_fn recv_fn, void *userdata)
+{
+	struct resolve_method *method = talloc_zero(ctx, struct resolve_method);
+
+	if (method == NULL)
+		return false;
+
+	method->send_fn = send_fn;
+	method->recv_fn = recv_fn;
+	method->privdata = userdata;
+	DLIST_ADD_END(ctx->methods, method, struct resolve_method *);
+	return true;
+}
+
+/**
+  handle completion of one name resolve method
+*/
+static void resolve_handler(struct composite_context *creq)
+{
+	struct composite_context *c = (struct composite_context *)creq->async.private_data;
+	struct resolve_state *state = talloc_get_type(c->private_data, struct resolve_state);
+	const struct resolve_method *method = state->method;
+
+	c->status = method->recv_fn(creq, state, &state->reply_addr);
+	
+	if (!NT_STATUS_IS_OK(c->status)) {
+		state->method = state->method->next;
+		state->creq = setup_next_method(c);
+		if (state->creq != NULL) {
+			return;
+		}
+	}
+
+	if (!NT_STATUS_IS_OK(c->status)) {
+		c->state = COMPOSITE_STATE_ERROR;
+	} else {
+		c->state = COMPOSITE_STATE_DONE;
+	}
+	if (c->async.fn) {
+		c->async.fn(c);
+	}
+}
+
+
+static struct composite_context *setup_next_method(struct composite_context *c)
+{
+	struct resolve_state *state = talloc_get_type(c->private_data, struct resolve_state);
+	struct composite_context *creq = NULL;
+
+	do {
+		if (state->method) {
+			creq = state->method->send_fn(c, c->event_ctx, state->method->privdata, &state->name);
+		}
+		if (creq == NULL && state->method) state->method = state->method->next;
+
+	} while (!creq && state->method);
+
+	if (creq) {
+		creq->async.fn = resolve_handler;
+		creq->async.private_data = c;
+	}
+
+	return creq;
+}
+
+/*
+  general name resolution - async send
+ */
+struct composite_context *resolve_name_send(struct resolve_context *ctx,
+					    struct nbt_name *name, 
+					    struct event_context *event_ctx)
+{
+	struct composite_context *c;
+	struct resolve_state *state;
+
+	if (ctx == NULL || event_ctx == NULL) {
+		return NULL;
+	}
+
+	c = composite_create(ctx, event_ctx);
+	if (c == NULL) return NULL;
+
+	if (composite_nomem(c->event_ctx, c)) return c;
+
+	state = talloc(c, struct resolve_state);
+	if (composite_nomem(state, c)) return c;
+	c->private_data = state;
+
+	c->status = nbt_name_dup(state, name, &state->name);
+	if (!composite_is_ok(c)) return c;
+	
+	state->ctx = talloc_reference(state, ctx);
+	if (composite_nomem(state->ctx, c)) return c;
+
+	if (is_ipaddress(state->name.name) || 
+	    strcasecmp(state->name.name, "localhost") == 0) {
+		struct in_addr ip = interpret_addr2(state->name.name);
+		state->reply_addr = talloc_strdup(state, inet_ntoa(ip));
+		if (composite_nomem(state->reply_addr, c)) return c;
+		composite_done(c);
+		return c;
+	}
+
+	state->method = ctx->methods;
+	state->creq = setup_next_method(c);
+	if (composite_nomem(state->creq, c)) return c;
+	
+	return c;
+}
+
+/*
+  general name resolution method - recv side
+ */
+NTSTATUS resolve_name_recv(struct composite_context *c, 
+			   TALLOC_CTX *mem_ctx, const char **reply_addr)
+{
+	NTSTATUS status;
+
+	status = composite_wait(c);
+
+	if (NT_STATUS_IS_OK(status)) {
+		struct resolve_state *state = talloc_get_type(c->private_data, struct resolve_state);
+		*reply_addr = talloc_steal(mem_ctx, state->reply_addr);
+	}
+
+	talloc_free(c);
+	return status;
+}
+
+/*
+  general name resolution - sync call
+ */
+NTSTATUS resolve_name(struct resolve_context *ctx, struct nbt_name *name, TALLOC_CTX *mem_ctx, const char **reply_addr, struct event_context *ev)
+{
+	struct composite_context *c = resolve_name_send(ctx, name, ev); 
+	return resolve_name_recv(c, mem_ctx, reply_addr);
+}
+
+/* Initialise a struct nbt_name with a NULL scope */
+
+void make_nbt_name(struct nbt_name *nbt, const char *name, int type)
+{
+	nbt->name = name;
+	nbt->scope = NULL;
+	nbt->type = type;
+}
+
+/* Initialise a struct nbt_name with a NBT_NAME_CLIENT (0x00) name */
+
+void make_nbt_name_client(struct nbt_name *nbt, const char *name)
+{
+	make_nbt_name(nbt, name, NBT_NAME_CLIENT);
+}
+
+/* Initialise a struct nbt_name with a NBT_NAME_SERVER (0x20) name */
+
+void make_nbt_name_server(struct nbt_name *nbt, const char *name)
+{
+	make_nbt_name(nbt, name, NBT_NAME_SERVER);
+}
+
+