const cgoAvailable … type addrinfoErrno … func (eai addrinfoErrno) Error() string { … } func (eai addrinfoErrno) Temporary() bool { … } func (eai addrinfoErrno) Timeout() bool { … } // isAddrinfoErrno is just for testing purposes. func (eai addrinfoErrno) isAddrinfoErrno() { … } // doBlockingWithCtx executes a blocking function in a separate goroutine when the provided // context is cancellable. It is intended for use with calls that don't support context // cancellation (cgo, syscalls). blocking func may still be running after this function finishes. // For the duration of the execution of the blocking function, the thread is 'acquired' using [acquireThread], // blocking might not be executed when the context gets canceled early. func doBlockingWithCtx[T any](ctx context.Context, lookupName string, blocking func() (T, error)) (T, error) { … } func cgoLookupHost(ctx context.Context, name string) (hosts []string, err error) { … } func cgoLookupPort(ctx context.Context, network, service string) (port int, err error) { … } func cgoLookupServicePort(hints *_C_struct_addrinfo, network, service string) (port int, err error) { … } func cgoLookupHostIP(network, name string) (addrs []IPAddr, err error) { … } func cgoLookupIP(ctx context.Context, network, name string) (addrs []IPAddr, err error) { … } const nameinfoLen … const maxNameinfoLen … func cgoLookupPTR(ctx context.Context, addr string) (names []string, err error) { … } func cgoLookupAddrPTR(addr string, sa *_C_struct_sockaddr, salen _C_socklen_t) (names []string, err error) { … } func cgoSockaddr(ip IP, zone string) (*_C_struct_sockaddr, _C_socklen_t) { … } func cgoLookupCNAME(ctx context.Context, name string) (cname string, err error, completed bool) { … } // resSearch will make a call to the 'res_nsearch' routine in the C library // and parse the output as a slice of DNS resources. func resSearch(ctx context.Context, hostname string, rtype, class int) ([]dnsmessage.Resource, error) { … } func cgoResSearch(hostname string, rtype, class int) ([]dnsmessage.Resource, error) { … }
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