Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 342 insertions, 0 deletions

diff --git a/source4/libcli/resolve/resolve.c b/source4/libcli/resolve/resolve.c
new file mode 100644
index 0000000..db2606b
--- /dev/null
+++ b/source4/libcli/resolve/resolve.c
@@ -0,0 +1,342 @@
+/* 
+   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 "libcli/composite/composite.h"
+#include "libcli/resolve/resolve.h"
+#include "librpc/gen_ndr/ndr_nbt.h"
+#include "system/network.h"
+#include "lib/socket/socket.h"
+#include "../lib/util/dlinklist.h"
+#include "lib/tsocket/tsocket.h"
+#include "lib/util/util_net.h"
+
+#undef strcasecmp
+
+struct resolve_state {
+	struct resolve_context *ctx;
+	struct resolve_method *method;
+	uint32_t flags;
+	uint16_t port;
+	struct nbt_name name;
+	struct composite_context *creq;
+	struct socket_address **addrs;
+	char **names;
+};
+
+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);
+	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->addrs, &state->names);
+	
+	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->flags,
+						      state->port,
+						      &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_all_send(struct resolve_context *ctx,
+						TALLOC_CTX *mem_ctx,
+						uint32_t flags, /* RESOLVE_NAME_FLAG_* */
+						uint16_t port,
+						struct nbt_name *name,
+						struct tevent_context *event_ctx)
+{
+	struct composite_context *c;
+	struct resolve_state *state;
+
+	if (event_ctx == NULL) {
+		return NULL;
+	}
+
+	c = composite_create(mem_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;
+
+	state->flags = flags;
+	state->port = port;
+
+	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) {
+		state->addrs = talloc_array(state, struct socket_address *, 2);
+		if (composite_nomem(state->addrs, c)) return c;
+		state->addrs[0] = socket_address_from_strings(state->addrs, "ip",
+							      state->name.name, 0);
+		if (composite_nomem(state->addrs[0], c)) return c;
+		state->addrs[1] = NULL;
+		state->names = talloc_array(state, char *, 2);
+		if (composite_nomem(state->names, c)) return c;
+		state->names[0] = talloc_strdup(state->names, state->name.name);
+		if (composite_nomem(state->names[0], c)) return c;
+		state->names[1] = NULL;
+		composite_done(c);
+		return c;
+	}
+
+	state->method = ctx->methods;
+	if (state->method == NULL) {
+		composite_error(c, NT_STATUS_BAD_NETWORK_NAME);
+		return c;
+	}
+	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_all_recv(struct composite_context *c,
+			       TALLOC_CTX *mem_ctx,
+			       struct socket_address ***addrs,
+			       char ***names)
+{
+	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);
+		*addrs = talloc_steal(mem_ctx, state->addrs);
+		if (names) {
+			*names = talloc_steal(mem_ctx, state->names);
+		}
+	}
+
+	talloc_free(c);
+	return status;
+}
+
+struct composite_context *resolve_name_ex_send(struct resolve_context *ctx,
+					       TALLOC_CTX *mem_ctx,
+					       uint32_t flags, /* RESOLVE_NAME_FLAG_* */
+					       uint16_t port,
+					       struct nbt_name *name,
+					       struct tevent_context *event_ctx)
+{
+	return resolve_name_all_send(ctx, mem_ctx, flags, port, name, event_ctx);
+}
+
+struct composite_context *resolve_name_send(struct resolve_context *ctx,
+					    TALLOC_CTX *mem_ctx,
+					    struct nbt_name *name,
+					    struct tevent_context *event_ctx)
+{
+	return resolve_name_ex_send(ctx, mem_ctx, 0, 0, name, event_ctx);
+}
+
+NTSTATUS resolve_name_recv(struct composite_context *c,
+			   TALLOC_CTX *mem_ctx,
+			   const char **reply_addr)
+{
+	NTSTATUS status;
+	struct socket_address **addrs = NULL;
+
+	status = resolve_name_all_recv(c, mem_ctx, &addrs, NULL);
+
+	if (NT_STATUS_IS_OK(status)) {
+		struct tsocket_address *t_addr = socket_address_to_tsocket_address(addrs, addrs[0]);
+		if (!t_addr) {
+			return NT_STATUS_NO_MEMORY;
+		}
+
+		*reply_addr = tsocket_address_inet_addr_string(t_addr, mem_ctx);
+		talloc_free(addrs);
+		if (!*reply_addr) {
+			return NT_STATUS_NO_MEMORY;
+		}
+	}
+
+	return status;
+}
+
+/*
+  receive multiple responses from resolve_name_send()
+ */
+NTSTATUS resolve_name_multiple_recv(struct composite_context *c,
+				    TALLOC_CTX *mem_ctx,
+				    const char ***reply_addrs)
+{
+	NTSTATUS status;
+	struct socket_address **addrs = NULL;
+	int i;
+
+	status = resolve_name_all_recv(c, mem_ctx, &addrs, NULL);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	/* count the addresses */
+	for (i=0; addrs[i]; i++) ;
+
+	*reply_addrs = talloc_array(mem_ctx, const char *, i+1);
+	NT_STATUS_HAVE_NO_MEMORY(*reply_addrs);
+
+	for (i=0; addrs[i]; i++) {
+		struct tsocket_address *t_addr = socket_address_to_tsocket_address(addrs, addrs[i]);
+		NT_STATUS_HAVE_NO_MEMORY(t_addr);
+
+		(*reply_addrs)[i] = tsocket_address_inet_addr_string(t_addr, *reply_addrs);
+		NT_STATUS_HAVE_NO_MEMORY((*reply_addrs)[i]);
+	}
+	(*reply_addrs)[i] = NULL;
+
+	talloc_free(addrs);
+
+	return status;
+}
+
+/*
+  general name resolution - sync call
+ */
+NTSTATUS resolve_name_ex(struct resolve_context *ctx,
+			 uint32_t flags, /* RESOLVE_NAME_FLAG_* */
+			 uint16_t port,
+			 struct nbt_name *name,
+			 TALLOC_CTX *mem_ctx,
+			 const char **reply_addr,
+			 struct tevent_context *ev)
+{
+	struct composite_context *c = resolve_name_ex_send(ctx, mem_ctx, flags, port, 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);
+}
+
+