resolve_address.h

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#ifndef GRPC_INTERNAL_CORE_IOMGR_RESOLVE_ADDRESS_H
#define GRPC_INTERNAL_CORE_IOMGR_RESOLVE_ADDRESS_H

#include <stddef.h>

#define GRPC_MAX_SOCKADDR_SIZE 128

typedef struct {
  char addr[GRPC_MAX_SOCKADDR_SIZE];
  int 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)(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. */
grpc_resolved_addresses *grpc_blocking_resolve_address(
    const char *addr, const char *default_port);

#endif  /* GRPC_INTERNAL_CORE_IOMGR_RESOLVE_ADDRESS_H */