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/*
Unix SMB/CIFS implementation.
Copyright (C) Rafal Szczesniak 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.
*/
/*
a composite function for name resolving
*/
#include "includes.h"
#include "lib/events/events.h"
#include "libnet/libnet.h"
#include "libcli/composite/composite.h"
#include "lib/messaging/messaging.h"
#include "lib/messaging/irpc.h"
#include "libcli/resolve/resolve.h"
#include "libcli/finddcs.h"
struct lookup_state {
struct nbt_name hostname;
const char *address;
};
static void continue_name_resolved(struct composite_context *ctx);
/**
* Sends asynchronous Lookup request
*
* @param io arguments and result of the call
*/
struct composite_context *libnet_Lookup_send(struct libnet_context *ctx,
struct libnet_Lookup *io)
{
struct composite_context *c;
struct lookup_state *s;
struct composite_context *cresolve_req;
const char** methods;
/* allocate context and state structures */
c = talloc_zero(NULL, struct composite_context);
if (c == NULL) return NULL;
s = talloc_zero(c, struct lookup_state);
if (s == NULL) {
composite_error(c, NT_STATUS_NO_MEMORY);
return c;
}
/* prepare event context */
c->event_ctx = event_context_find(c);
if (c->event_ctx == NULL) {
composite_error(c, NT_STATUS_NO_MEMORY);
return c;
}
if (io == NULL || io->in.hostname == NULL) {
composite_error(c, NT_STATUS_INVALID_PARAMETER);
return c;
}
/* parameters */
s->hostname.name = talloc_strdup(s, io->in.hostname);
s->hostname.type = io->in.type;
s->hostname.scope = NULL;
/* name resolution methods */
if (io->in.methods) {
methods = io->in.methods;
} else {
methods = (const char**)ctx->name_res_methods;
}
c->private_data = s;
c->state = COMPOSITE_STATE_IN_PROGRESS;
/* send resolve request */
cresolve_req = resolve_name_send(&s->hostname, c->event_ctx, methods);
composite_continue(c, cresolve_req, continue_name_resolved, c);
return c;
}
static void continue_name_resolved(struct composite_context *ctx)
{
struct composite_context *c;
struct lookup_state *s;
c = talloc_get_type(ctx->async.private_data, struct composite_context);
s = talloc_get_type(c->private_data, struct lookup_state);
c->status = resolve_name_recv(ctx, s, &s->address);
composite_done(c);
}
/**
* Waits for and receives results of asynchronous Lookup call
*
* @param c composite context returned by asynchronous Lookup call
* @param mem_ctx memory context of the call
* @param io pointer to results (and arguments) of the call
* @return nt status code of execution
*/
NTSTATUS libnet_Lookup_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
struct libnet_Lookup *io)
{
NTSTATUS status;
struct lookup_state *s;
status = composite_wait(c);
if (NT_STATUS_IS_OK(status)) {
s = talloc_get_type(c->private_data, struct lookup_state);
io->out.address = str_list_make(mem_ctx, s->address, NULL);
NT_STATUS_HAVE_NO_MEMORY(io->out.address);
}
talloc_free(c);
return status;
}
/**
* Synchronous version of Lookup call
*
* @param mem_ctx memory context for the call
* @param io arguments and results of the call
* @return nt status code of execution
*/
NTSTATUS libnet_Lookup(struct libnet_context *ctx, TALLOC_CTX *mem_ctx,
struct libnet_Lookup *io)
{
struct composite_context *c = libnet_Lookup_send(ctx, io);
return libnet_Lookup_recv(c, mem_ctx, io);
}
/*
* Shortcut functions to find common types of name
* (and skip nbt name type argument)
*/
/**
* Sends asynchronous LookupHost request
*/
struct composite_context* libnet_LookupHost_send(struct libnet_context *ctx,
struct libnet_Lookup *io)
{
io->in.type = NBT_NAME_SERVER;
return libnet_Lookup_send(ctx, io);
}
/**
* Synchronous version of LookupHost call
*/
NTSTATUS libnet_LookupHost(struct libnet_context *ctx, TALLOC_CTX *mem_ctx,
struct libnet_Lookup *io)
{
struct composite_context *c = libnet_LookupHost_send(ctx, io);
return libnet_Lookup_recv(c, mem_ctx, io);
}
/**
* Sends asynchronous LookupDCs request
*/
struct composite_context* libnet_LookupDCs_send(struct libnet_context *ctx,
TALLOC_CTX *mem_ctx,
struct libnet_LookupDCs *io)
{
struct composite_context *c;
struct messaging_context *msg_ctx = messaging_client_init(mem_ctx, ctx->event_ctx);
c = finddcs_send(mem_ctx, io->in.domain_name, io->in.name_type,
NULL, ctx->name_res_methods, ctx->event_ctx, msg_ctx);
return c;
}
/**
* Waits for and receives results of asynchronous Lookup call
*
* @param c composite context returned by asynchronous Lookup call
* @param mem_ctx memory context of the call
* @param io pointer to results (and arguments) of the call
* @return nt status code of execution
*/
NTSTATUS libnet_LookupDCs_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
struct libnet_LookupDCs *io)
{
NTSTATUS status;
status = finddcs_recv(c, mem_ctx, &io->out.num_dcs, &io->out.dcs);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
return status;
}
/**
* Synchronous version of LookupDCs
*/
NTSTATUS libnet_LookupDCs(struct libnet_context *ctx, TALLOC_CTX *mem_ctx,
struct libnet_LookupDCs *io)
{
struct composite_context *c = libnet_LookupDCs_send(ctx, mem_ctx, io);
return libnet_LookupDCs_recv(c, mem_ctx, io);
}
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