/* 

   Unix SMB/CIFS implementation.

   implements a non-blocking connect operation that is aware of the samba4

   events system

   Copyright (C) Andrew Tridgell 2005

   Copyright (C) Volker Lendecke 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 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/socket/socket.h"

#include "lib/events/events.h"

#include "libcli/composite/composite.h"

struct connect_state {

  struct socket_context *sock;

  const struct socket_address *my_address;

  const struct socket_address *server_address;

  uint32_t flags;

};

static void socket_connect_handler(struct tevent_context *ev,

           struct tevent_fd *fde, 

           uint16_t flags, void *private_data);

/*

  call the real socket_connect() call, and setup event handler

*/

static void socket_send_connect(struct composite_context *result)

{

  struct tevent_fd *fde;

  struct connect_state *state = talloc_get_type(result->private_data, 

                  struct connect_state);

  result->status = socket_connect(state->sock,

          state->my_address,

          state->server_address,

          state->flags);

  if (NT_STATUS_IS_ERR(result->status) && 

      !NT_STATUS_EQUAL(result->status,

           NT_STATUS_MORE_PROCESSING_REQUIRED)) {

    composite_error(result, result->status);

    return;

  }

  fde = tevent_add_fd(result->event_ctx, result,

         socket_get_fd(state->sock),

         TEVENT_FD_READ|TEVENT_FD_WRITE,

         socket_connect_handler, result);

  composite_nomem(fde, result);

}

/*

  send a socket connect, potentially doing some name resolution first

*/

struct composite_context *socket_connect_send(struct socket_context *sock,

                struct socket_address *my_address,

                struct socket_address *server_address, 

                uint32_t flags,

                struct tevent_context *event_ctx)

{

  struct composite_context *result;

  struct connect_state *state;

  result = composite_create(sock, event_ctx);

  if (result == NULL) return NULL;

  state = talloc_zero(result, struct connect_state);

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

  result->private_data = state;

  state->sock = talloc_reference(state, sock);

  if (composite_nomem(state->sock, result)) return result;

  if (my_address) {

    void *ref = talloc_reference(state, my_address);

    if (composite_nomem(ref, result)) {

      return result;

    }

    state->my_address = my_address;

  }

  {

    void *ref = talloc_reference(state, server_address);

    if (composite_nomem(ref, result)) {

      return result;

    }

    state->server_address = server_address;

  }

  state->flags = flags;

  set_blocking(socket_get_fd(sock), false);

  socket_send_connect(result);

  return result;

}

/*

  handle write events on connect completion

*/

static void socket_connect_handler(struct tevent_context *ev,

           struct tevent_fd *fde, 

           uint16_t flags, void *private_data)

{

  struct composite_context *result =

    talloc_get_type(private_data, struct composite_context);

  struct connect_state *state = talloc_get_type(result->private_data,

                  struct connect_state);

  result->status = socket_connect_complete(state->sock, state->flags);

  if (!composite_is_ok(result)) return;

  composite_done(result);

}

/*

  wait for a socket_connect_send() to finish

*/

NTSTATUS socket_connect_recv(struct composite_context *result)

{

  NTSTATUS status = composite_wait(result);

  talloc_free(result);

  return status;

}

/*

  like socket_connect() but takes an event context, doing a semi-async connect

*/

NTSTATUS socket_connect_ev(struct socket_context *sock,

         struct socket_address *my_address,

         struct socket_address *server_address, 

         uint32_t flags,

         struct tevent_context *ev)

{

  struct composite_context *ctx;

  ctx = socket_connect_send(sock, my_address, 

          server_address, flags, ev);

  return socket_connect_recv(ctx);

}