--- title: CFNetwork framework: cfnetwork role: collection role_heading: Framework path: cfnetwork --- # CFNetwork Access network services and handle changes in network configurations. Build on abstractions of network protocols to simplify tasks such as working with BSD sockets, administering HTTP and FTP servers, and managing Bonjour services. ## Topics ### Errors - [CFNetworkErrors](cfnetwork/cfnetworkerrors.md) - [Error Dictionary Keys](cfnetwork/error-dictionary-keys.md) - [Error Domains](cfnetwork/error-domains.md) ### Hosts - [CFHost](cfnetwork/cfhost.md) - [CFHostInfoType](cfnetwork/cfhostinfotype.md) - [CFHostClientContext](cfnetwork/cfhostclientcontext.md) - [CFHostCancelInfoResolution(_:_:)](cfnetwork/cfhostcancelinforesolution(_:_:).md) - [CFHostCreateCopy(_:_:)](cfnetwork/cfhostcreatecopy(_:_:).md) - [CFHostCreateWithAddress(_:_:)](cfnetwork/cfhostcreatewithaddress(_:_:).md) - [CFHostCreateWithName(_:_:)](cfnetwork/cfhostcreatewithname(_:_:).md) - [CFHostGetAddressing(_:_:)](cfnetwork/cfhostgetaddressing(_:_:).md) - [CFHostGetNames(_:_:)](cfnetwork/cfhostgetnames(_:_:).md) - [CFHostGetReachability(_:_:)](cfnetwork/cfhostgetreachability(_:_:).md) - [CFHostGetTypeID()](cfnetwork/cfhostgettypeid().md) - [CFHostScheduleWithRunLoop(_:_:_:)](cfnetwork/cfhostschedulewithrunloop(_:_:_:).md) - [CFHostSetClient(_:_:_:)](cfnetwork/cfhostsetclient(_:_:_:).md) - [CFHostStartInfoResolution(_:_:_:)](cfnetwork/cfhoststartinforesolution(_:_:_:).md) - [CFHostUnscheduleFromRunLoop(_:_:_:)](cfnetwork/cfhostunschedulefromrunloop(_:_:_:).md) ### Global Proxy Configuration - [CFNetworkCopyProxiesForURL(_:_:)](cfnetwork/cfnetworkcopyproxiesforurl(_:_:).md) - [CFNetworkCopyProxiesForAutoConfigurationScript(_:_:_:)](cfnetwork/cfnetworkcopyproxiesforautoconfigurationscript(_:_:_:).md) - [CFNetworkExecuteProxyAutoConfigurationScript(_:_:_:_:)](cfnetwork/cfnetworkexecuteproxyautoconfigurationscript(_:_:_:_:).md) - [CFNetworkExecuteProxyAutoConfigurationURL(_:_:_:_:)](cfnetwork/cfnetworkexecuteproxyautoconfigurationurl(_:_:_:_:).md) - [CFNetworkCopySystemProxySettings()](cfnetwork/cfnetworkcopysystemproxysettings().md) - [CFProxyAutoConfigurationResultCallback](cfnetwork/cfproxyautoconfigurationresultcallback.md) - [Property Keys](cfnetwork/property-keys.md) - [Proxy Types](cfnetwork/proxy-types.md) - [Global Proxy Settings Constants](cfnetwork/global-proxy-settings-constants.md) ### HTTP Authentication - [CFHTTPAuthentication](cfnetwork/cfhttpauthentication.md) - [CFHTTPAuthenticationAppliesToRequest(_:_:)](cfnetwork/cfhttpauthenticationappliestorequest(_:_:).md) - [CFHTTPAuthenticationCopyDomains(_:)](cfnetwork/cfhttpauthenticationcopydomains(_:).md) - [CFHTTPAuthenticationCopyMethod(_:)](cfnetwork/cfhttpauthenticationcopymethod(_:).md) - [CFHTTPAuthenticationCopyRealm(_:)](cfnetwork/cfhttpauthenticationcopyrealm(_:).md) - [CFHTTPAuthenticationCreateFromResponse(_:_:)](cfnetwork/cfhttpauthenticationcreatefromresponse(_:_:).md) - [CFHTTPAuthenticationGetTypeID()](cfnetwork/cfhttpauthenticationgettypeid().md) - [CFHTTPAuthenticationIsValid(_:_:)](cfnetwork/cfhttpauthenticationisvalid(_:_:).md) - [CFHTTPAuthenticationRequiresAccountDomain(_:)](cfnetwork/cfhttpauthenticationrequiresaccountdomain(_:).md) - [CFHTTPAuthenticationRequiresOrderedRequests(_:)](cfnetwork/cfhttpauthenticationrequiresorderedrequests(_:).md) - [CFHTTPAuthenticationRequiresUserNameAndPassword(_:)](cfnetwork/cfhttpauthenticationrequiresusernameandpassword(_:).md) - [kCFHTTPAuthenticationAccountDomain](cfnetwork/kcfhttpauthenticationaccountdomain.md) - [kCFHTTPAuthenticationPassword](cfnetwork/kcfhttpauthenticationpassword.md) - [kCFHTTPAuthenticationSchemeBasic](cfnetwork/kcfhttpauthenticationschemebasic.md) - [kCFHTTPAuthenticationSchemeDigest](cfnetwork/kcfhttpauthenticationschemedigest.md) - [kCFHTTPAuthenticationSchemeKerberos](cfnetwork/kcfhttpauthenticationschemekerberos.md) - [kCFHTTPAuthenticationSchemeNTLM](cfnetwork/kcfhttpauthenticationschementlm.md) - [kCFHTTPAuthenticationSchemeNegotiate](cfnetwork/kcfhttpauthenticationschemenegotiate.md) - [kCFHTTPAuthenticationSchemeNegotiate2](cfnetwork/kcfhttpauthenticationschemenegotiate2.md) - [kCFHTTPAuthenticationSchemeXMobileMeAuthToken](cfnetwork/kcfhttpauthenticationschemexmobilemeauthtoken.md) - [kCFHTTPAuthenticationUsername](cfnetwork/kcfhttpauthenticationusername.md) ### HTTP Messages - [CFHTTPMessage](cfnetwork/cfhttpmessage.md) - [CFHTTPMessageAddAuthentication(_:_:_:_:_:_:)](cfnetwork/cfhttpmessageaddauthentication(_:_:_:_:_:_:).md) - [CFHTTPMessageAppendBytes(_:_:_:)](cfnetwork/cfhttpmessageappendbytes(_:_:_:).md) - [CFHTTPMessageApplyCredentialDictionary(_:_:_:_:)](cfnetwork/cfhttpmessageapplycredentialdictionary(_:_:_:_:).md) - [CFHTTPMessageApplyCredentials(_:_:_:_:_:)](cfnetwork/cfhttpmessageapplycredentials(_:_:_:_:_:).md) - [CFHTTPMessageCopyAllHeaderFields(_:)](cfnetwork/cfhttpmessagecopyallheaderfields(_:).md) - [CFHTTPMessageCopyBody(_:)](cfnetwork/cfhttpmessagecopybody(_:).md) - [CFHTTPMessageCopyHeaderFieldValue(_:_:)](cfnetwork/cfhttpmessagecopyheaderfieldvalue(_:_:).md) - [CFHTTPMessageCopyRequestMethod(_:)](cfnetwork/cfhttpmessagecopyrequestmethod(_:).md) - [CFHTTPMessageCopyRequestURL(_:)](cfnetwork/cfhttpmessagecopyrequesturl(_:).md) - [CFHTTPMessageCopyResponseStatusLine(_:)](cfnetwork/cfhttpmessagecopyresponsestatusline(_:).md) - [CFHTTPMessageCopySerializedMessage(_:)](cfnetwork/cfhttpmessagecopyserializedmessage(_:).md) - [CFHTTPMessageCopyVersion(_:)](cfnetwork/cfhttpmessagecopyversion(_:).md) - [CFHTTPMessageCreateCopy(_:_:)](cfnetwork/cfhttpmessagecreatecopy(_:_:).md) - [CFHTTPMessageCreateEmpty(_:_:)](cfnetwork/cfhttpmessagecreateempty(_:_:).md) - [CFHTTPMessageCreateRequest(_:_:_:_:)](cfnetwork/cfhttpmessagecreaterequest(_:_:_:_:).md) - [CFHTTPMessageCreateResponse(_:_:_:_:)](cfnetwork/cfhttpmessagecreateresponse(_:_:_:_:).md) - [CFHTTPMessageGetResponseStatusCode(_:)](cfnetwork/cfhttpmessagegetresponsestatuscode(_:).md) - [CFHTTPMessageGetTypeID()](cfnetwork/cfhttpmessagegettypeid().md) - [CFHTTPMessageIsHeaderComplete(_:)](cfnetwork/cfhttpmessageisheadercomplete(_:).md) - [CFHTTPMessageIsRequest(_:)](cfnetwork/cfhttpmessageisrequest(_:).md) - [CFHTTPMessageSetBody(_:_:)](cfnetwork/cfhttpmessagesetbody(_:_:).md) - [CFHTTPMessageSetHeaderFieldValue(_:_:_:)](cfnetwork/cfhttpmessagesetheaderfieldvalue(_:_:_:).md) - [kCFHTTPVersion1_0](cfnetwork/kcfhttpversion1_0.md) - [kCFHTTPVersion1_1](cfnetwork/kcfhttpversion1_1.md) - [kCFHTTPVersion2_0](cfnetwork/kcfhttpversion2_0.md) ### FTP - [CFFTPCreateParsedResourceListing(_:_:_:_:)](cfnetwork/cfftpcreateparsedresourcelisting(_:_:_:_:).md) - [kCFFTPResourceGroup](cfnetwork/kcfftpresourcegroup.md) - [kCFFTPResourceLink](cfnetwork/kcfftpresourcelink.md) - [kCFFTPResourceModDate](cfnetwork/kcfftpresourcemoddate.md) - [kCFFTPResourceMode](cfnetwork/kcfftpresourcemode.md) - [kCFFTPResourceName](cfnetwork/kcfftpresourcename.md) - [kCFFTPResourceOwner](cfnetwork/kcfftpresourceowner.md) - [kCFFTPResourceSize](cfnetwork/kcfftpresourcesize.md) - [kCFFTPResourceType](cfnetwork/kcfftpresourcetype.md) ### Network Diagnostics - [CFNetDiagnostic](cfnetwork/cfnetdiagnostic.md) - [CFNetDiagnosticStatusValues](cfnetwork/cfnetdiagnosticstatusvalues.md) - [CFNetDiagnosticCopyNetworkStatusPassively(_:_:)](cfnetwork/cfnetdiagnosticcopynetworkstatuspassively(_:_:).md) - [CFNetDiagnosticCreateWithStreams(_:_:_:)](cfnetwork/cfnetdiagnosticcreatewithstreams(_:_:_:).md) - [CFNetDiagnosticCreateWithURL(_:_:)](cfnetwork/cfnetdiagnosticcreatewithurl(_:_:).md) - [CFNetDiagnosticDiagnoseProblemInteractively(_:)](cfnetwork/cfnetdiagnosticdiagnoseprobleminteractively(_:).md) - [CFNetDiagnosticSetName(_:_:)](cfnetwork/cfnetdiagnosticsetname(_:_:).md) ### Network Services - [CFNetService](cfnetwork/cfnetservice.md) - [CFNetServiceBrowser](cfnetwork/cfnetservicebrowser.md) - [CFNetServiceBrowserFlags](cfnetwork/cfnetservicebrowserflags.md) - [CFNetServiceMonitor](cfnetwork/cfnetservicemonitor.md) - [CFNetServiceMonitorType](cfnetwork/cfnetservicemonitortype.md) - [CFNetServiceClientContext](cfnetwork/cfnetserviceclientcontext.md) - [CFNetServiceRegisterFlags](cfnetwork/cfnetserviceregisterflags.md) - [CFNetServicesError](cfnetwork/cfnetserviceserror.md) - [CFNetServiceBrowserInvalidate(_:)](cfnetwork/cfnetservicebrowserinvalidate(_:).md) - [CFNetServiceBrowserScheduleWithRunLoop(_:_:_:)](cfnetwork/cfnetservicebrowserschedulewithrunloop(_:_:_:).md) - [CFNetServiceBrowserCreate(_:_:_:)](cfnetwork/cfnetservicebrowsercreate(_:_:_:).md) - [CFNetServiceBrowserGetTypeID()](cfnetwork/cfnetservicebrowsergettypeid().md) - [CFNetServiceBrowserSearchForDomains(_:_:_:)](cfnetwork/cfnetservicebrowsersearchfordomains(_:_:_:).md) - [CFNetServiceBrowserSearchForServices(_:_:_:_:)](cfnetwork/cfnetservicebrowsersearchforservices(_:_:_:_:).md) - [CFNetServiceBrowserStopSearch(_:_:)](cfnetwork/cfnetservicebrowserstopsearch(_:_:).md) - [CFNetServiceBrowserUnscheduleFromRunLoop(_:_:_:)](cfnetwork/cfnetservicebrowserunschedulefromrunloop(_:_:_:).md) - [CFNetServiceCancel(_:)](cfnetwork/cfnetservicecancel(_:).md) - [CFNetServiceCreate(_:_:_:_:_:)](cfnetwork/cfnetservicecreate(_:_:_:_:_:).md) - [CFNetServiceCreateCopy(_:_:)](cfnetwork/cfnetservicecreatecopy(_:_:).md) - [CFNetServiceCreateDictionaryWithTXTData(_:_:)](cfnetwork/cfnetservicecreatedictionarywithtxtdata(_:_:).md) - [CFNetServiceCreateTXTDataWithDictionary(_:_:)](cfnetwork/cfnetservicecreatetxtdatawithdictionary(_:_:).md) - [CFNetServiceGetAddressing(_:)](cfnetwork/cfnetservicegetaddressing(_:).md) - [CFNetServiceGetDomain(_:)](cfnetwork/cfnetservicegetdomain(_:).md) - [CFNetServiceGetName(_:)](cfnetwork/cfnetservicegetname(_:).md) - [CFNetServiceGetPortNumber(_:)](cfnetwork/cfnetservicegetportnumber(_:).md) - [CFNetServiceGetTXTData(_:)](cfnetwork/cfnetservicegettxtdata(_:).md) - [CFNetServiceGetTargetHost(_:)](cfnetwork/cfnetservicegettargethost(_:).md) - [CFNetServiceGetType(_:)](cfnetwork/cfnetservicegettype(_:).md) - [CFNetServiceGetTypeID()](cfnetwork/cfnetservicegettypeid().md) - [CFNetServiceMonitorCreate(_:_:_:_:)](cfnetwork/cfnetservicemonitorcreate(_:_:_:_:).md) - [CFNetServiceMonitorGetTypeID()](cfnetwork/cfnetservicemonitorgettypeid().md) - [CFNetServiceMonitorInvalidate(_:)](cfnetwork/cfnetservicemonitorinvalidate(_:).md) - [CFNetServiceMonitorScheduleWithRunLoop(_:_:_:)](cfnetwork/cfnetservicemonitorschedulewithrunloop(_:_:_:).md) - [CFNetServiceMonitorStart(_:_:_:)](cfnetwork/cfnetservicemonitorstart(_:_:_:).md) - [CFNetServiceMonitorStop(_:_:)](cfnetwork/cfnetservicemonitorstop(_:_:).md) - [CFNetServiceMonitorUnscheduleFromRunLoop(_:_:_:)](cfnetwork/cfnetservicemonitorunschedulefromrunloop(_:_:_:).md) - [CFNetServiceRegisterWithOptions(_:_:_:)](cfnetwork/cfnetserviceregisterwithoptions(_:_:_:).md) - [CFNetServiceResolveWithTimeout(_:_:_:)](cfnetwork/cfnetserviceresolvewithtimeout(_:_:_:).md) - [CFNetServiceSetClient(_:_:_:)](cfnetwork/cfnetservicesetclient(_:_:_:).md) - [CFNetServiceSetTXTData(_:_:)](cfnetwork/cfnetservicesettxtdata(_:_:).md) - [CFNetServiceUnscheduleFromRunLoop(_:_:_:)](cfnetwork/cfnetserviceunschedulefromrunloop(_:_:_:).md) - [CFNetServiceScheduleWithRunLoop(_:_:_:)](cfnetwork/cfnetserviceschedulewithrunloop(_:_:_:).md) ### Streams - [CFReadStreamCreateForHTTPRequest(_:_:)](cfnetwork/cfreadstreamcreateforhttprequest(_:_:).md) - [CFReadStreamCreateForStreamedHTTPRequest(_:_:_:)](cfnetwork/cfreadstreamcreateforstreamedhttprequest(_:_:_:).md) - [kCFStreamPropertyHTTPAttemptPersistentConnection](cfnetwork/kcfstreampropertyhttpattemptpersistentconnection.md) - [kCFStreamPropertyHTTPFinalRequest](cfnetwork/kcfstreampropertyhttpfinalrequest.md) - [kCFStreamPropertyHTTPFinalURL](cfnetwork/kcfstreampropertyhttpfinalurl.md) - [kCFStreamPropertyHTTPProxy](cfnetwork/kcfstreampropertyhttpproxy.md) - [kCFStreamPropertyHTTPProxyHost](cfnetwork/kcfstreampropertyhttpproxyhost.md) - [kCFStreamPropertyHTTPProxyPort](cfnetwork/kcfstreampropertyhttpproxyport.md) - [kCFStreamPropertyHTTPRequestBytesWrittenCount](cfnetwork/kcfstreampropertyhttprequestbyteswrittencount.md) - [kCFStreamPropertyHTTPResponseHeader](cfnetwork/kcfstreampropertyhttpresponseheader.md) - [kCFStreamPropertyHTTPSProxyHost](cfnetwork/kcfstreampropertyhttpsproxyhost.md) - [kCFStreamPropertyHTTPSProxyPort](cfnetwork/kcfstreampropertyhttpsproxyport.md) - [kCFStreamPropertyHTTPShouldAutoredirect](cfnetwork/kcfstreampropertyhttpshouldautoredirect.md) - [CFWriteStreamCreateWithFTPURL(_:_:)](cfnetwork/cfwritestreamcreatewithftpurl(_:_:).md) - [CFReadStreamCreateWithFTPURL(_:_:)](cfnetwork/cfreadstreamcreatewithftpurl(_:_:).md) - [kCFStreamPropertyFTPAttemptPersistentConnection](cfnetwork/kcfstreampropertyftpattemptpersistentconnection.md) - [kCFStreamPropertyFTPFetchResourceInfo](cfnetwork/kcfstreampropertyftpfetchresourceinfo.md) - [kCFStreamPropertyFTPFileTransferOffset](cfnetwork/kcfstreampropertyftpfiletransferoffset.md) - [kCFStreamPropertyFTPPassword](cfnetwork/kcfstreampropertyftppassword.md) - [kCFStreamPropertyFTPProxy](cfnetwork/kcfstreampropertyftpproxy.md) - [kCFStreamPropertyFTPProxyHost](cfnetwork/kcfstreampropertyftpproxyhost.md) - [kCFStreamPropertyFTPProxyPassword](cfnetwork/kcfstreampropertyftpproxypassword.md) - [kCFStreamPropertyFTPProxyPort](cfnetwork/kcfstreampropertyftpproxyport.md) - [kCFStreamPropertyFTPProxyUser](cfnetwork/kcfstreampropertyftpproxyuser.md) - [kCFStreamPropertyFTPResourceSize](cfnetwork/kcfstreampropertyftpresourcesize.md) - [kCFStreamPropertyFTPUsePassiveMode](cfnetwork/kcfstreampropertyftpusepassivemode.md) - [kCFStreamPropertyFTPUserName](cfnetwork/kcfstreampropertyftpusername.md) - [CFSocketStreamSOCKSGetError(_:)](cfnetwork/cfsocketstreamsocksgeterror(_:).md) - [CFSocketStreamSOCKSGetErrorSubdomain(_:)](cfnetwork/cfsocketstreamsocksgeterrorsubdomain(_:).md) - [CFStreamCreatePairWithSocketToCFHost(_:_:_:_:_:)](cfnetwork/cfstreamcreatepairwithsockettocfhost(_:_:_:_:_:).md) - [CFStreamCreatePairWithSocketToNetService(_:_:_:_:)](cfnetwork/cfstreamcreatepairwithsockettonetservice(_:_:_:_:).md) - [kCFStreamNetworkServiceType](cfnetwork/kcfstreamnetworkservicetype.md) - [kCFStreamNetworkServiceTypeBackground](cfnetwork/kcfstreamnetworkservicetypebackground.md) - [kCFStreamNetworkServiceTypeCallSignaling](cfnetwork/kcfstreamnetworkservicetypecallsignaling.md) - [kCFStreamNetworkServiceTypeVideo](cfnetwork/kcfstreamnetworkservicetypevideo.md) - [kCFStreamNetworkServiceTypeVoIP](cfnetwork/kcfstreamnetworkservicetypevoip.md) - [kCFStreamNetworkServiceTypeVoice](cfnetwork/kcfstreamnetworkservicetypevoice.md) - [kCFStreamErrorDomainFTP](cfnetwork/kcfstreamerrordomainftp.md) - [kCFStreamErrorDomainHTTP](cfnetwork/kcfstreamerrordomainhttp.md) - [kCFStreamErrorDomainMach](cfnetwork/kcfstreamerrordomainmach.md) - [kCFStreamErrorDomainNetDB](cfnetwork/kcfstreamerrordomainnetdb.md) - [kCFStreamErrorDomainNetServices](cfnetwork/kcfstreamerrordomainnetservices.md) - [kCFStreamErrorDomainSOCKS](corefoundation/kcfstreamerrordomainsocks.md) - [kCFStreamErrorDomainSSL](corefoundation/kcfstreamerrordomainssl.md) - [kCFStreamErrorDomainSystemConfiguration](cfnetwork/kcfstreamerrordomainsystemconfiguration.md) - [kCFStreamErrorDomainWinSock](cfnetwork/kcfstreamerrordomainwinsock.md) - [kCFStreamPropertyConnectionIsCellular](cfnetwork/kcfstreampropertyconnectioniscellular.md) - [kCFStreamPropertyNoCellular](cfnetwork/kcfstreampropertynocellular.md) - [kCFStreamPropertyProxyLocalBypass](cfnetwork/kcfstreampropertyproxylocalbypass.md) - [kCFStreamPropertySOCKSPassword](corefoundation/kcfstreampropertysockspassword.md) - [kCFStreamPropertySOCKSProxy](corefoundation/kcfstreampropertysocksproxy.md) - [kCFStreamPropertySOCKSProxyHost](corefoundation/kcfstreampropertysocksproxyhost.md) - [kCFStreamPropertySOCKSProxyPort](corefoundation/kcfstreampropertysocksproxyport.md) - [kCFStreamPropertySOCKSUser](corefoundation/kcfstreampropertysocksuser.md) - [kCFStreamPropertySOCKSVersion](corefoundation/kcfstreampropertysocksversion.md) - [kCFStreamPropertySSLContext](cfnetwork/kcfstreampropertysslcontext.md) - [kCFStreamPropertySSLPeerCertificates](cfnetwork/kcfstreampropertysslpeercertificates.md) - [kCFStreamPropertySSLPeerTrust](cfnetwork/kcfstreampropertysslpeertrust.md) - [kCFStreamPropertySSLSettings](cfnetwork/kcfstreampropertysslsettings.md) - [kCFStreamPropertyShouldCloseNativeSocket](corefoundation/kcfstreampropertyshouldclosenativesocket.md) - [kCFStreamPropertySocketExtendedBackgroundIdleMode](cfnetwork/kcfstreampropertysocketextendedbackgroundidlemode.md) - [kCFStreamPropertySocketRemoteHost](cfnetwork/kcfstreampropertysocketremotehost.md) - [kCFStreamPropertySocketRemoteNetService](cfnetwork/kcfstreampropertysocketremotenetservice.md) - [kCFStreamPropertySocketSecurityLevel](corefoundation/kcfstreampropertysocketsecuritylevel.md) - [kCFStreamSSLAllowsAnyRoot](cfnetwork/kcfstreamsslallowsanyroot.md) - [kCFStreamSSLAllowsExpiredCertificates](cfnetwork/kcfstreamsslallowsexpiredcertificates.md) - [kCFStreamSSLAllowsExpiredRoots](cfnetwork/kcfstreamsslallowsexpiredroots.md) - [kCFStreamSSLCertificates](cfnetwork/kcfstreamsslcertificates.md) - [kCFStreamSSLIsServer](cfnetwork/kcfstreamsslisserver.md) - [kCFStreamSSLLevel](cfnetwork/kcfstreamssllevel.md) - [kCFStreamSSLPeerName](cfnetwork/kcfstreamsslpeername.md) - [kCFStreamSSLValidatesCertificateChain](cfnetwork/kcfstreamsslvalidatescertificatechain.md) - [kCFStreamSocketSOCKSVersion4](corefoundation/kcfstreamsocketsocksversion4.md) - [kCFStreamSocketSOCKSVersion5](corefoundation/kcfstreamsocketsocksversion5.md) - [kCFStreamSocketSecurityLevelNegotiatedSSL](corefoundation/kcfstreamsocketsecuritylevelnegotiatedssl.md) - [kCFStreamSocketSecurityLevelNone](corefoundation/kcfstreamsocketsecuritylevelnone.md) - [kCFStreamSocketSecurityLevelSSLv2](corefoundation/kcfstreamsocketsecuritylevelsslv2.md) - [kCFStreamSocketSecurityLevelSSLv3](corefoundation/kcfstreamsocketsecuritylevelsslv3.md) - [kCFStreamSocketSecurityLevelTLSv1](corefoundation/kcfstreamsocketsecurityleveltlsv1.md) - [CFStreamErrorHTTP](cfnetwork/cfstreamerrorhttp.md) - [CFStreamErrorHTTPAuthentication](cfnetwork/cfstreamerrorhttpauthentication.md) - [Secure Sockets (SOCKS) Errors](cfnetwork/1518266-secure-sockets-socks-errors.md) ### Reference - [CFNetwork Data Types](cfnetwork/cfnetwork-data-types.md) - [CFNetwork Enumerations](cfnetwork/cfnetwork-enumerations.md) - [CFNetwork Constants](cfnetwork/cfnetwork-constants.md)