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 *
 * Copyright 2015, Google Inc.
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 * modification, are permitted provided that the following conditions are
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 *
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 * notice, this list of conditions and the following disclaimer.
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 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_CONNECTOR_H
#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_CONNECTOR_H

#include "src/core/channel/channel_stack.h"
#include "src/core/iomgr/sockaddr.h"
#include "src/core/transport/transport.h"

typedef struct grpc_connector grpc_connector;
typedef struct grpc_connector_vtable grpc_connector_vtable;

struct grpc_connector {
  const grpc_connector_vtable *vtable;
};

typedef struct {
  /** set of pollsets interested in this connection */
  grpc_pollset_set *interested_parties;
  /** address to connect to */
  const struct sockaddr *addr;
  size_t addr_len;
  /** initial connect string to send */
  gpr_slice initial_connect_string;
  /** deadline for connection */
  gpr_timespec deadline;
  /** channel arguments (to be passed to transport) */
  const grpc_channel_args *channel_args;
} grpc_connect_in_args;

typedef struct {
  /** the connected transport */
  grpc_transport *transport;
  /** any additional filters (owned by the caller of connect) */
  const grpc_channel_filter **filters;
  size_t num_filters;

  /** channel arguments (to be passed to the filters) */
  const grpc_channel_args *channel_args;
} grpc_connect_out_args;

struct grpc_connector_vtable {
  void (*ref)(grpc_connector *connector);
  void (*unref)(grpc_exec_ctx *exec_ctx, grpc_connector *connector);
  /** Implementation of grpc_connector_shutdown */
  void (*shutdown)(grpc_exec_ctx *exec_ctx, grpc_connector *connector);
  /** Implementation of grpc_connector_connect */
  void (*connect)(grpc_exec_ctx *exec_ctx, grpc_connector *connector,
                  const grpc_connect_in_args *in_args,
                  grpc_connect_out_args *out_args, grpc_closure *notify);
};

void grpc_connector_ref(grpc_connector *connector);
void grpc_connector_unref(grpc_exec_ctx *exec_ctx, grpc_connector *connector);
/** Connect using the connector: max one outstanding call at a time */
void grpc_connector_connect(grpc_exec_ctx *exec_ctx, grpc_connector *connector,
                            const grpc_connect_in_args *in_args,
                            grpc_connect_out_args *out_args,
                            grpc_closure *notify);
/** Cancel any pending connection */
void grpc_connector_shutdown(grpc_exec_ctx *exec_ctx,
                             grpc_connector *connector);

#endif
