static grpc_error *blocking_resolve_address_impl(
const char *name, const char *default_port,
grpc_resolved_addresses **addresses) {
char *host;
char *port;
struct addrinfo hints;
uv_getaddrinfo_t req;
int s;
grpc_error *err;
req.addrinfo = NULL;
err = try_split_host_port(name, default_port, &host, &port);
if (err != GRPC_ERROR_NONE) {
goto done;
}
/* Call getaddrinfo */
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC; /* ipv4 or ipv6 */
hints.ai_socktype = SOCK_STREAM; /* stream socket */
hints.ai_flags = AI_PASSIVE; /* for wildcard IP address */
s = uv_getaddrinfo(uv_default_loop(), &req, NULL, host, port, &hints);
err = handle_addrinfo_result(s, req.addrinfo, addresses);
done:
gpr_free(host);
gpr_free(port);
if (req.addrinfo) {
uv_freeaddrinfo(req.addrinfo);
}
return err;
}
static void getaddrinfo_callback(uv_getaddrinfo_t *req, int status,
struct addrinfo *res) {
request *r = (request *)req->data;
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
grpc_error *error;
error = handle_addrinfo_result(status, res, r->addresses);
grpc_exec_ctx_sched(&exec_ctx, r->on_done, error, NULL);
grpc_exec_ctx_finish(&exec_ctx);
gpr_free(r->hints);
gpr_free(r);
gpr_free(req);
uv_freeaddrinfo(res);
}
static void getaddrinfo_callback(uv_getaddrinfo_t *req, int status,
struct addrinfo *res) {
request *r = (request *)req->data;
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
grpc_error *error;
int retry_status;
gpr_free(req);
retry_status = retry_named_port_failure(status, r, getaddrinfo_callback);
if (retry_status == 0) {
// The request is being retried. Nothing should be done here
return;
}
/* Either no retry was attempted, or the retry failed. Either way, the
original error probably has more interesting information */
error = handle_addrinfo_result(status, res, r->addresses);
grpc_closure_sched(&exec_ctx, r->on_done, error);
grpc_exec_ctx_finish(&exec_ctx);
gpr_free(r->hints);
gpr_free(r);
uv_freeaddrinfo(res);
}
