/*

   Unix SMB/CIFS implementation.

   lmhosts name resolution module

   Copyright (C) Andrew Tridgell 1994-1998,2005

   Copyright (C) Jeremy Allison 2007

   Copyright (C) Jelmer Vernooij 2007

   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2009-2014

   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 "lib/socket/socket.h"

#include "system/network.h"

#include "lib/socket/netif.h"

#include "param/param.h"

#include "lib/util/util_net.h"

#include "libcli/nbt/libnbt.h"

#include "dynconfig.h"

struct resolve_lmhosts_state {

  struct socket_address **addrs;

  char **names;

};

/**

  lmhosts name resolution method - async send

 */

/*

  general name resolution - async send

 */

static struct composite_context *resolve_name_lmhosts_send(

  TALLOC_CTX *mem_ctx,

  struct tevent_context *event_ctx,

  void *userdata, uint32_t flags,

  uint16_t port,

  struct nbt_name *name)

{

  struct composite_context *c;

  struct resolve_lmhosts_state *state;

  struct sockaddr_storage *resolved_iplist;

  size_t resolved_count = 0, i;

  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_zero(c, struct resolve_lmhosts_state);

  if (composite_nomem(state, c)) return c;

  c->private_data = state;

  c->status = resolve_lmhosts_file_as_sockaddr(state,

                 dyn_LMHOSTSFILE,

                 name->name,

                 name->type,

                 &resolved_iplist,

                 &resolved_count);

  if (!composite_is_ok(c)) return c;

  for (i=0; i < resolved_count; i += 2) {

    state->addrs = talloc_realloc(state, state->addrs, struct socket_address *, i+2);

    if (composite_nomem(state->addrs, c)) return c;

    set_sockaddr_port((struct sockaddr *)&resolved_iplist[i], port);

    state->addrs[i] = socket_address_from_sockaddr(state->addrs, (struct sockaddr *)&resolved_iplist[i], sizeof(resolved_iplist[i]));

    if (composite_nomem(state->addrs[i], c)) return c;

    state->addrs[i+1] = NULL;

    state->names = talloc_realloc(state, state->names, char *, i+2);

    if (composite_nomem(state->addrs, c)) return c;

    state->names[i] = talloc_strdup(state->names, name->name);

    if (composite_nomem(state->names[i], c)) return c;

    state->names[i+1] = NULL;

  }

  composite_done(c);

  return c;

}

/*

  general name resolution method - recv side

 */

static NTSTATUS resolve_name_lmhosts_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_lmhosts_state *state = talloc_get_type(c->private_data, struct resolve_lmhosts_state);

    *addrs = talloc_steal(mem_ctx, state->addrs);

    if (names) {

      *names = talloc_steal(mem_ctx, state->names);

    }

  }

  talloc_free(c);

  return status;

}

bool resolve_context_add_lmhosts_method(struct resolve_context *ctx)

{

  return resolve_context_add_method(ctx, resolve_name_lmhosts_send, resolve_name_lmhosts_recv, NULL);

}