# DNSServiceBrowseReply Callback for handling the results of previous calls to DNSServiceBrowse. ``` typealias DNSServiceBrowseReply = (DNSServiceRef?, DNSServiceFlags, UInt32, DNSServiceErrorType, UnsafePointer?, UnsafePointer?, UnsafePointer?, UnsafeMutableRawPointer?) -> Void ``` ## Parameters `sdRef` The DNSServiceRef initialized by [`DNSServiceBrowse(_:_:_:_:_:_:_:)`](/documentation/dnssd/DNSServiceBrowse(_:_:_:_:_:_:_:)). `flags` Possible values are [`kDNSServiceFlagsMoreComing`](/documentation/dnssd/kDNSServiceFlagsMoreComing) and kDNSServiceFlagsAdd. See flag definitions for details. `interfaceIndex` The interface on which the service is advertised. This index should be passed to [`DNSServiceResolve(_:_:_:_:_:_:_:_:)`](/documentation/dnssd/DNSServiceResolve(_:_:_:_:_:_:_:_:)) when resolving the service. `errorCode` Will be [`kDNSServiceErr_NoError`](/documentation/dnssd/kDNSServiceErr_NoError) (0) on success, otherwise will indicate the failure that occurred. Other parameters are undefined if the errorCode is nonzero. `serviceName` The discovered service name. This name should be displayed to the user, and stored for subsequent use in the [`DNSServiceResolve(_:_:_:_:_:_:_:_:)`](/documentation/dnssd/DNSServiceResolve(_:_:_:_:_:_:_:_:)) call. `regtype` The service type, which is usually (but not always) the same as was passed to [`DNSServiceBrowse(_:_:_:_:_:_:_:)`](/documentation/dnssd/DNSServiceBrowse(_:_:_:_:_:_:_:)). One case where the discovered service type may not be the same as the requested service type is when using subtypes: The client may want to browse for only those ftp servers that allow anonymous connections. The client will pass the string “_ftp._tcp,_anon” to [`DNSServiceBrowse(_:_:_:_:_:_:_:)`](/documentation/dnssd/DNSServiceBrowse(_:_:_:_:_:_:_:)), but the type of the service that’s discovered is simply “_ftp._tcp”. The regtype for each discovered service instance should be stored along with the name, so that it can be passed to [`DNSServiceResolve(_:_:_:_:_:_:_:_:)`](/documentation/dnssd/DNSServiceResolve(_:_:_:_:_:_:_:_:)) when the service is later resolved. `replyDomain` The domain of the discovered service instance. This may or may not be the same as the domain that was passed to [`DNSServiceBrowse(_:_:_:_:_:_:_:)`](/documentation/dnssd/DNSServiceBrowse(_:_:_:_:_:_:_:)). The domain for each discovered service instance should be stored along with the name, so that it can be passed to [`DNSServiceResolve(_:_:_:_:_:_:_:_:)`](/documentation/dnssd/DNSServiceResolve(_:_:_:_:_:_:_:_:)) when the service is later resolved. `context` The context pointer that was passed to the callout. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)