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 *
 * Copyright 2015-2016, Google Inc.
 * All rights reserved.
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 * modification, are permitted provided that the following conditions are
 * met:
 *
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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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#ifndef GRPC_CORE_IOMGR_RESOLVE_ADDRESS_H
#define GRPC_CORE_IOMGR_RESOLVE_ADDRESS_H

#include <stddef.h>
#include "src/core/iomgr/exec_ctx.h"
#include "src/core/iomgr/iomgr.h"

#define GRPC_MAX_SOCKADDR_SIZE 128

typedef struct {
  char addr[GRPC_MAX_SOCKADDR_SIZE];
  size_t len;
} grpc_resolved_address;

typedef struct {
  size_t naddrs;
  grpc_resolved_address *addrs;
} grpc_resolved_addresses;

/* Async result callback:
   On success: addresses is the result, and the callee must call
   grpc_resolved_addresses_destroy when it's done with them
   On failure: addresses is NULL */
typedef void (*grpc_resolve_cb)(grpc_exec_ctx *exec_ctx, void *arg,
                                grpc_resolved_addresses *addresses);
/* Asynchronously resolve addr. Use default_port if a port isn't designated
   in addr, otherwise use the port in addr. */
/* TODO(ctiller): add a timeout here */
void grpc_resolve_address(const char *addr, const char *default_port,
                          grpc_resolve_cb cb, void *arg);
/* Destroy resolved addresses */
void grpc_resolved_addresses_destroy(grpc_resolved_addresses *addresses);

/* Resolve addr in a blocking fashion. Returns NULL on failure. On success,
   result must be freed with grpc_resolved_addresses_destroy. */
extern grpc_resolved_addresses *(*grpc_blocking_resolve_address)(
    const char *name, const char *default_port);

#endif /* GRPC_CORE_IOMGR_RESOLVE_ADDRESS_H */