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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 "libcli/raw/libcliraw.h"
#include "lib/events/events.h"
#include "libnet/libnet.h"
#include "libcli/composite/composite.h"
#include "libnet/composite.h"
#include "librpc/gen_ndr/ndr_nbt.h"
struct lookup_state {
struct composite_context *resolve_ctx;
struct nbt_name hostname;
const char **address;
};
/**
* 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;
const char** methods;
const char* address = talloc_array(ctx, const char, 16);
if (!io) return NULL;
/* allocate context and state structures */
c = talloc_zero(NULL, struct composite_context);
if (c == NULL) goto failed;
s = talloc_zero(c, struct lookup_state);
if (s == NULL) goto failed;
/* prepare event context */
c->event_ctx = event_context_init(c);
if (c->event_ctx == NULL) goto failed;
/* parameters */
s->hostname.name = talloc_strdup(s, io->in.hostname);
s->hostname.type = io->in.type;
s->hostname.scope = NULL;
s->address = &address;
/* 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 */
s->resolve_ctx = resolve_name_send(&s->hostname, c->event_ctx, methods);
return c;
failed:
talloc_free(c);
return NULL;
}
/**
* 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;
s = talloc_get_type(c->private_data, struct lookup_state);
status = resolve_name_recv(s->resolve_ctx, mem_ctx, s->address);
if (NT_STATUS_IS_OK(status)) {
io->out.address = s->address;
}
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 LookupPdc request
*/
struct composite_context* libnet_LookupPdc_send(struct libnet_context *ctx,
struct libnet_Lookup *io)
{
io->in.type = NBT_NAME_PDC;
return libnet_Lookup_send(ctx, io);
}
/**
* Synchronous version of LookupPdc
*/
NTSTATUS libnet_LookupPdc(struct libnet_context *ctx, TALLOC_CTX *mem_ctx,
struct libnet_Lookup *io)
{
struct composite_context *c = libnet_LookupPdc_send(ctx, io);
return libnet_Lookup_recv(c, mem_ctx, io);
}
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