/* opassuan.c - Low-level Assuan operations.

 * Copyright (C) 2009 g10 Code GmbH

 *

 * This file is part of GPGME.

 *

 * GPGME is free software; you can redistribute it and/or modify it

 * under the terms of the GNU Lesser General Public License as

 * published by the Free Software Foundation; either version 2.1 of

 * the License, or (at your option) any later version.

 *

 * GPGME 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

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this program; if not, see <https://gnu.org/licenses/>.

 * SPDX-License-Identifier: LGPL-2.1-or-later

 */

#if HAVE_CONFIG_H

#include <config.h>

#endif

/* Suppress warning for accessing deprecated member "err".  */

#define _GPGME_IN_GPGME 1

#include "gpgme.h"

#include "context.h"

#include "ops.h"

#include "util.h"

#include "debug.h"

/* LEGACY: Remove this when removing the deprecated result

   structure.  */

typedef struct

{

  struct _gpgme_op_assuan_result result;

} *op_data_t;

static gpgme_error_t

opassuan_start (gpgme_ctx_t ctx, int synchronous,

                const char *command,

                gpgme_assuan_data_cb_t data_cb,

                void *data_cb_value,

                gpgme_assuan_inquire_cb_t inq_cb,

                void *inq_cb_value,

                gpgme_assuan_status_cb_t status_cb,

                void *status_cb_value)

{

  gpgme_error_t err;

  if (!command || !*command)

    return gpg_error (GPG_ERR_INV_VALUE);

  /* The flag value 256 is used to suppress an engine reset.  This is

     required to keep the connection running.  */

  err = _gpgme_op_reset (ctx, ((synchronous&255) | 256));

  if (err)

    return err;

  {

    /* LEGACY: Remove this when removing the deprecated result

       structure.  */

    void *hook;

    op_data_t opd;

    err = _gpgme_op_data_lookup (ctx, OPDATA_ASSUAN, &hook,

				 sizeof (*opd), NULL);

    if (err)

      return err;

  }

  return _gpgme_engine_op_assuan_transact (ctx->engine, command,

                                           data_cb, data_cb_value,

                                           inq_cb, inq_cb_value,

                                           status_cb, status_cb_value);

}

/* XXXX.  This is the asynchronous variant. */

gpgme_error_t

gpgme_op_assuan_transact_start (gpgme_ctx_t ctx,

				const char *command,

				gpgme_assuan_data_cb_t data_cb,

				void *data_cb_value,

				gpgme_assuan_inquire_cb_t inq_cb,

				void *inq_cb_value,

				gpgme_assuan_status_cb_t status_cb,

				void *status_cb_value)

{

  gpg_error_t err;

  TRACE_BEG  (DEBUG_CTX, "gpgme_op_assuan_transact_start", ctx,

	      "command=%s, data_cb=%p/%p, inq_cb=%p/%p, status_cb=%p/%p",

	      command, data_cb, data_cb_value, inq_cb, inq_cb_value,

	      status_cb, status_cb_value);

  if (!ctx)

    return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));

  err = opassuan_start (ctx, 0, command, data_cb, data_cb_value,

			inq_cb, inq_cb_value, status_cb, status_cb_value);

  return TRACE_ERR (err);

}

/* XXXX.  This is the synchronous variant. */

gpgme_error_t

gpgme_op_assuan_transact_ext (gpgme_ctx_t ctx,

			      const char *command,

			      gpgme_assuan_data_cb_t data_cb,

			      void *data_cb_value,

			      gpgme_assuan_inquire_cb_t inq_cb,

			      void *inq_cb_value,

			      gpgme_assuan_status_cb_t status_cb,

			      void *status_cb_value,

			      gpgme_error_t *op_err_p)

{

  gpgme_error_t err;

  gpgme_error_t op_err;

  TRACE_BEG  (DEBUG_CTX, "gpgme_op_assuan_transact", ctx,

	      "command=%s, data_cb=%p/%p, inq_cb=%p/%p, status_cb=%p/%p, "

	      "op_err=%p",

	      command, data_cb, data_cb_value, inq_cb, inq_cb_value,

	      status_cb, status_cb_value, op_err_p);

  if (!ctx)

    return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));

  err = opassuan_start (ctx, 1, command,

                        data_cb, data_cb_value,

                        inq_cb, inq_cb_value,

                        status_cb, status_cb_value);

  if (err)

    goto out;

  err = _gpgme_wait_one_ext (ctx, &op_err);

  if (op_err)

    {

      TRACE_LOG  ("op_err = %s <%s>", gpgme_strerror (op_err),

		  gpgme_strsource (op_err));

      if (! op_err_p)

	{

	  TRACE_LOG ("warning: operational error ignored by user");

	}

    }

  if (op_err_p)

    *op_err_p = op_err;

 out:

  return TRACE_ERR (err);

}

/* Compatibility code for old interface.  */

/* Evil hack breaking abstractions for the purpose of localizing our

   other hack.  This is copied from engine.c.  */

struct engine

{

  struct engine_ops *ops;

  void *engine;

};

gpg_error_t _gpgme_engine_assuan_last_op_err (void *engine);

gpgme_assuan_result_t

gpgme_op_assuan_result (gpgme_ctx_t ctx)

{

  gpgme_error_t err;

  void *hook;

  op_data_t opd;

  TRACE_BEG (DEBUG_CTX, "gpgme_op_assuan_result", ctx, "");

  err = _gpgme_op_data_lookup (ctx, OPDATA_ASSUAN, &hook, -1, NULL);

  opd = hook;

  /* Check in case this function is used without having run a command

     before.  */

  if (err || !opd)

    {

      TRACE_SUC ("result=(null)");

      return NULL;

    }

  /* All of this is a hack for the old style interface.  The new style

     interface returns op errors directly.  */

  opd->result.err = _gpgme_engine_assuan_last_op_err (ctx->engine->engine);

  if (opd->result.err)

    {

      TRACE_LOG  ("err = %s", gpg_strerror (0));

    }

  else

    {

      TRACE_LOG  ("err = %s <%s>", gpg_strerror (opd->result.err),

		  gpg_strsource (opd->result.err));

    }

  TRACE_SUC ("result=%p", &opd->result);

  return &opd->result;

}

gpgme_error_t

gpgme_op_assuan_transact (gpgme_ctx_t ctx,

			  const char *command,

			  gpgme_assuan_data_cb_t data_cb,

			  void *data_cb_value,

			  gpgme_assuan_inquire_cb_t inq_cb,

			  void *inq_cb_value,

			  gpgme_assuan_status_cb_t status_cb,

			  void *status_cb_value)

{

  gpgme_error_t err;

  TRACE (DEBUG_CTX, "gpgme_op_assuan_transact", ctx, "");

  if (!ctx)

    return gpg_error (GPG_ERR_INV_VALUE);

  /* Users of the old-style session based interfaces need to look at

     the result structure.  */

  err = gpgme_op_assuan_transact_ext (ctx, command, data_cb, data_cb_value,

				      inq_cb, inq_cb_value,

				      status_cb, status_cb_value, NULL);

  return err;

}