# turn # turn TURN allocation identity types and transport helpers. ## Classes | Name | Description | |------|-------------| | [`Client`](https://auscaster.com/icey/docs/api-reference/icy-turn-Client.md#client-3) | TURN client that manages relay allocations, permissions, and data relay via RFC 5766. | | [`FiveTuple`](https://auscaster.com/icey/docs/api-reference/icy-turn-FiveTuple.md#fivetuple) | TURN allocation identity tuple: client remote address, server local address, and transport protocol. | | [`IAllocation`](https://auscaster.com/icey/docs/api-reference/icy-turn-IAllocation.md#iallocation) | Base class for TURN relay allocations shared by client and server flows. | | [`PermissionPolicy`](https://auscaster.com/icey/docs/api-reference/icy-turn-PermissionPolicy.md#permissionpolicy) | Lightweight server-side TURN permission policy. | | [`Request`](https://auscaster.com/icey/docs/api-reference/icy-turn-Request.md#request-14) | A STUN message annotated with the transport type and source/destination addresses needed for server-side routing and response generation. | | [`Server`](https://auscaster.com/icey/docs/api-reference/icy-turn-Server.md#server-7) | TURN server RFC 5766 / RFC 6062 implementation. Listens on UDP and/or TCP, authenticates requests via [ServerObserver](https://auscaster.com/icey/docs/api-reference/icy-turn-ServerObserver.md#serverobserver), and manages [ServerAllocation](https://auscaster.com/icey/docs/api-reference/icy-turn-ServerAllocation.md#serverallocation) objects for each 5-tuple. | | [`ServerAllocation`](https://auscaster.com/icey/docs/api-reference/icy-turn-ServerAllocation.md#serverallocation) | Server-side TURN allocation that tracks permissions, lifetime, and relay state. Handles Refresh and CreatePermission requests common to both UDP and TCP allocations. Subclassed by [UDPAllocation](https://auscaster.com/icey/docs/api-reference/icy-turn-UDPAllocation.md#udpallocation) and [TCPAllocation](https://auscaster.com/icey/docs/api-reference/icy-turn-TCPAllocation.md#tcpallocation) for transport-specific behaviour. | | [`TCPAllocation`](https://auscaster.com/icey/docs/api-reference/icy-turn-TCPAllocation.md#tcpallocation) | Server-side TCP TURN allocation with connection pair management per RFC 6062. Maintains a control connection for STUN signalling and an acceptor socket for incoming peer TCP connections. Each peer connection is tracked as a [TCPConnectionPair](https://auscaster.com/icey/docs/api-reference/icy-turn-TCPConnectionPair.md#tcpconnectionpair) and bridged to the client after a successful ConnectionBind. | | [`TCPClient`](https://auscaster.com/icey/docs/api-reference/icy-turn-TCPClient.md#tcpclient) | TCP transport TURN client with relay connection management per RFC 6062. Uses a single TCP control connection for STUN signalling and opens additional TCP relay connections for each peer via the Connect / ConnectionBind flow. | | [`TCPConnectionPair`](https://auscaster.com/icey/docs/api-reference/icy-turn-TCPConnectionPair.md#tcpconnectionpair) | Paired TCP connections forming a single TURN relay pipe between a client and a peer. Lifetime managed by [IntrusivePtr](https://auscaster.com/icey/docs/api-reference/icy-IntrusivePtr.md#intrusiveptr); the owning [TCPAllocation](https://auscaster.com/icey/docs/api-reference/icy-turn-TCPAllocation.md#tcpallocation) holds the Ptr in its pair map. | | [`UDPAllocation`](https://auscaster.com/icey/docs/api-reference/icy-turn-UDPAllocation.md#udpallocation) | Server-side UDP TURN allocation that relays datagrams to permitted peers. Binds a dedicated UDP relay socket for peer communication and forwards incoming datagrams to the client as Data Indications. | | [`UDPClient`](https://auscaster.com/icey/docs/api-reference/icy-turn-UDPClient.md#udpclient) | UDP transport TURN client for datagram-based relay allocations. Uses a single UDP socket for both STUN signalling and Send/Data Indications. All [Client](https://auscaster.com/icey/docs/api-reference/icy-turn-Client.md#client-3) methods apply; data is relayed via [sendData()](https://auscaster.com/icey/docs/api-reference/icy-turn-Client.md#senddata) using Send Indications. | | [`ClientObserver`](https://auscaster.com/icey/docs/api-reference/icy-turn-ClientObserver.md#clientobserver) | Abstract observer interface for TURN client events. Callers subclass this to receive allocation lifecycle and data relay callbacks. | | [`ClientState`](https://auscaster.com/icey/docs/api-reference/icy-turn-ClientState.md#clientstate) | [State](https://auscaster.com/icey/docs/api-reference/icy-State.md#state) machine states for the TURN client. | | [`Permission`](https://auscaster.com/icey/docs/api-reference/icy-turn-Permission.md#permission) | A single TURN permission entry associating a peer IP with a 5-minute expiry timer. Per RFC 5766 section 8, permissions last exactly 300 seconds and must be refreshed via a new CreatePermission request before they expire. | | [`RelayConnectionBinding`](https://auscaster.com/icey/docs/api-reference/icy-turn-RelayConnectionBinding.md#relayconnectionbinding) | Binding metadata stored as socket opaque data during a ConnectionBind handshake. Associates a relay socket with its TURN connection ID and peer address. | | [`ServerObserver`](https://auscaster.com/icey/docs/api-reference/icy-turn-ServerObserver.md#serverobserver) | Observer interface that the application must implement to participate in server-side allocation management and authentication. | | [`ServerOptions`](https://auscaster.com/icey/docs/api-reference/icy-turn-ServerOptions.md#serveroptions) | [Configuration](https://auscaster.com/icey/docs/api-reference/icy-Configuration.md#configuration) options for the TURN server. | | [`TCPClientObserver`](https://auscaster.com/icey/docs/api-reference/icy-turn-TCPClientObserver.md#tcpclientobserver) | Observer interface for TCP TURN client events (RFC 6062). Extends [ClientObserver](https://auscaster.com/icey/docs/api-reference/icy-turn-ClientObserver.md#clientobserver) with callbacks specific to TCP relay connections. | ## Enumerations | Name | Description | |------|-------------| | [`AuthenticationState`](#authenticationstate) | Result returned by [ServerObserver::authenticateRequest()](https://auscaster.com/icey/docs/api-reference/icy-turn-ServerObserver.md#authenticaterequest-1) to control how the server proceeds with an incoming STUN request. | --- ### AuthenticationState ```cpp enum AuthenticationState ``` [Defined in src/turn/include/icy/turn/types.h:50](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/types.h#L50) Result returned by [ServerObserver::authenticateRequest()](https://auscaster.com/icey/docs/api-reference/icy-turn-ServerObserver.md#authenticaterequest-1) to control how the server proceeds with an incoming STUN request. | Value | Description | |-------|-------------| | `Authenticating` | Authentication is in progress; server holds the request. | | `Authorized` | Credentials verified; request may proceed. | | `QuotaReached` | User quota exceeded; respond with 486. | | `NotAuthorized` | Credentials rejected; respond with 401. | ## Typedefs | Return | Name | Description | |--------|------|-------------| | [`KVCollection`](https://auscaster.com/icey/docs/api-reference/icy-KVCollection.md#kvcollection)< [`net::Address`](https://auscaster.com/icey/docs/api-reference/icy-net-Address.md#address), [`net::SocketEmitter`](https://auscaster.com/icey/docs/api-reference/icy-net-SocketEmitter.md#socketemitter) > | [`ConnectionManager`](#connectionmanager) | Relay connection registry keyed by peer address for RFC 6062 TCP relays. | | [`ConnectionManager::Map`](https://auscaster.com/icey/docs/api-reference/icy-KVCollection.md#map-5) | [`ConnectionManagerMap`](#connectionmanagermap) | Underlying map type used by the TCP relay connection registry. | | std::vector< [`Permission`](https://auscaster.com/icey/docs/api-reference/icy-turn-Permission.md#permission) > | [`PermissionList`](#permissionlist) | Active TURN permissions associated with one allocation. | | std::map< [`FiveTuple`](https://auscaster.com/icey/docs/api-reference/icy-turn-FiveTuple.md#fivetuple), std::unique_ptr< [`ServerAllocation`](https://auscaster.com/icey/docs/api-reference/icy-turn-ServerAllocation.md#serverallocation) > > | [`ServerAllocationMap`](#serverallocationmap) | Active server allocations keyed by the client/server 5-tuple. | | std::map< uint32_t, [`TCPConnectionPair::Ptr`](https://auscaster.com/icey/docs/api-reference/icy-turn-TCPConnectionPair.md#ptr-20) > | [`TCPConnectionPairMap`](#tcpconnectionpairmap) | Accepted peer TCP connections keyed by TURN CONNECTION-ID. | | `std::vector< std::string >` | [`IPList`](#iplist) | List of peer IP strings used when creating or refreshing permissions. | --- ### ConnectionManager ```cpp using ConnectionManager = KVCollection< net::Address, net::SocketEmitter > ``` Type: [`KVCollection`](https://auscaster.com/icey/docs/api-reference/icy-KVCollection.md#kvcollection)< [`net::Address`](https://auscaster.com/icey/docs/api-reference/icy-net-Address.md#address), [`net::SocketEmitter`](https://auscaster.com/icey/docs/api-reference/icy-net-SocketEmitter.md#socketemitter) > [Defined in src/turn/include/icy/turn/client/tcpclient.h:78](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/client/tcpclient.h#L78) Relay connection registry keyed by peer address for RFC 6062 TCP relays. --- ### ConnectionManagerMap ```cpp using ConnectionManagerMap = ConnectionManager::Map ``` Type: [`ConnectionManager::Map`](https://auscaster.com/icey/docs/api-reference/icy-KVCollection.md#map-5) [Defined in src/turn/include/icy/turn/client/tcpclient.h:81](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/client/tcpclient.h#L81) Underlying map type used by the TCP relay connection registry. --- ### PermissionList ```cpp using PermissionList = std::vector< Permission > ``` Type: std::vector< [`Permission`](https://auscaster.com/icey/docs/api-reference/icy-turn-Permission.md#permission) > [Defined in src/turn/include/icy/turn/permission.h:140](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/permission.h#L140) Active TURN permissions associated with one allocation. --- ### ServerAllocationMap ```cpp using ServerAllocationMap = std::map< FiveTuple, std::unique_ptr< ServerAllocation > > ``` Type: std::map< [`FiveTuple`](https://auscaster.com/icey/docs/api-reference/icy-turn-FiveTuple.md#fivetuple), std::unique_ptr< [`ServerAllocation`](https://auscaster.com/icey/docs/api-reference/icy-turn-ServerAllocation.md#serverallocation) > > [Defined in src/turn/include/icy/turn/server/server.h:120](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/server/server.h#L120) Active server allocations keyed by the client/server 5-tuple. --- ### TCPConnectionPairMap ```cpp using TCPConnectionPairMap = std::map< uint32_t, TCPConnectionPair::Ptr > ``` Type: std::map< uint32_t, [`TCPConnectionPair::Ptr`](https://auscaster.com/icey/docs/api-reference/icy-turn-TCPConnectionPair.md#ptr-20) > [Defined in src/turn/include/icy/turn/server/tcpallocation.h:29](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/server/tcpallocation.h#L29) Accepted peer TCP connections keyed by TURN CONNECTION-ID. --- ### IPList ```cpp using IPList = std::vector< std::string > ``` [Defined in src/turn/include/icy/turn/types.h:104](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/types.h#L104) List of peer IP strings used when creating or refreshing permissions. ## Variables | Return | Name | Description | |--------|------|-------------| | `constexpr std::int64_t` | [`kClientTimerInterval`](#kclienttimerinterval) `static` `constexpr` | [Timer](https://auscaster.com/icey/docs/api-reference/icy-Timer.md#timer) interval for client maintenance (30 seconds) | | `constexpr std::int64_t` | [`kClientDefaultLifetime`](#kclientdefaultlifetime) `static` `constexpr` | Default client allocation lifetime (5 minutes, in milliseconds) | | `constexpr long` | [`kClientDefaultTimeout`](#kclientdefaulttimeout) `static` `constexpr` | Default client transaction timeout (10 seconds) | | `constexpr std::int64_t` | [`kDefaultAllocationLifetime`](#kdefaultallocationlifetime) `static` `constexpr` | Default allocation lifetime: 10 minutes (in milliseconds) | | `constexpr int` | [`PERMISSION_LIFETIME`](#permission_lifetime) `static` `constexpr` | [Permission](https://auscaster.com/icey/docs/api-reference/icy-turn-Permission.md#permission) Lifetime MUST be 300 seconds (= 5 minutes). | | `constexpr uint32_t` | [`kServerDefaultLifetime`](#kserverdefaultlifetime) `static` `constexpr` | Default server allocation lifetime (2 minutes, in milliseconds) | | `constexpr uint32_t` | [`kServerMaxLifetime`](#kservermaxlifetime) `static` `constexpr` | Maximum server allocation lifetime (15 minutes, in milliseconds) | | `constexpr int` | [`kServerMaxPermissions`](#kservermaxpermissions) `static` `constexpr` | Maximum number of permissions per allocation. | | `constexpr int` | [`kServerTimerInterval`](#kservertimerinterval) `static` `constexpr` | [Server](https://auscaster.com/icey/docs/api-reference/icy-turn-Server.md#server-7) timer interval (10 seconds) | | `constexpr int` | [`kServerEarlyMediaBufferSize`](#kserverearlymediabuffersize) `static` `constexpr` | Early media buffer size. | | `constexpr int` | [`kConnectionBindTimeout`](#kconnectionbindtimeout) `static` `constexpr` | ConnectionBind request timeout (30 seconds, in milliseconds) | | `constexpr int` | [`CLIENT_SOCK_BUF_SIZE`](#client_sock_buf_size) `static` `constexpr` | Default socket buffer size for TURN client sockets. | | `constexpr int` | [`SERVER_SOCK_BUF_SIZE`](#server_sock_buf_size) `static` `constexpr` | Default socket buffer size for TURN server sockets. | | `constexpr uint8_t` | [`kProtocolUDP`](#kprotocoludp) `static` `constexpr` | TURN protocol numbers. | | `constexpr uint8_t` | [`kProtocolTCP`](#kprotocoltcp) `static` `constexpr` | IP protocol number for TCP. | | `constexpr int` | [`kErrorTryAlternate`](#kerrortryalternate) `static` `constexpr` | TURN/STUN error codes used in this module. | | `constexpr int` | [`kErrorBadRequest`](#kerrorbadrequest) `static` `constexpr` | [Request](https://auscaster.com/icey/docs/api-reference/icy-turn-Request.md#request-14) was malformed or missing required attributes. | | `constexpr int` | [`kErrorNotAuthorized`](#kerrornotauthorized) `static` `constexpr` | Authentication failed or credentials were not accepted. | | `constexpr int` | [`kErrorForbidden`](#kerrorforbidden) `static` `constexpr` | [Request](https://auscaster.com/icey/docs/api-reference/icy-turn-Request.md#request-14) was understood but is not permitted for this client. | | `constexpr int` | [`kErrorUnknownAttribute`](#kerrorunknownattribute) `static` `constexpr` | [Request](https://auscaster.com/icey/docs/api-reference/icy-turn-Request.md#request-14) included an unsupported comprehension-required attribute. | | `constexpr int` | [`kErrorUnsupportedTransport`](#kerrorunsupportedtransport) `static` `constexpr` | Requested transport protocol is not supported by the server. | | `constexpr int` | [`kErrorAllocationMismatch`](#kerrorallocationmismatch) `static` `constexpr` | [Client](https://auscaster.com/icey/docs/api-reference/icy-turn-Client.md#client-3) attempted an allocation operation that conflicts with existing state. | | `constexpr int` | [`kErrorStaleNonce`](#kerrorstalenonce) `static` `constexpr` | Authentication nonce expired and must be refreshed. | | `constexpr int` | [`kErrorWrongCredentials`](#kerrorwrongcredentials) `static` `constexpr` | Supplied credentials were well formed but did not match the allocation. | | `constexpr int` | [`kErrorConnectionAlreadyExists`](#kerrorconnectionalreadyexists) `static` `constexpr` | TURN TCP connection binding already exists. | | `constexpr int` | [`kErrorConnectionTimeoutOrFailure`](#kerrorconnectiontimeoutorfailure) `static` `constexpr` | TURN TCP peer connection attempt timed out or failed. | | `constexpr int` | [`kErrorAllocationQuotaReached`](#kerrorallocationquotareached) `static` `constexpr` | User or server allocation quota was exceeded. | | `constexpr int` | [`kErrorInsufficientCapacity`](#kerrorinsufficientcapacity) `static` `constexpr` | [Server](https://auscaster.com/icey/docs/api-reference/icy-turn-Server.md#server-7) lacks capacity to satisfy the request. | | `constexpr int` | [`kErrorOperationNotSupported`](#kerroroperationnotsupported) `static` `constexpr` | [Request](https://auscaster.com/icey/docs/api-reference/icy-turn-Request.md#request-14) is recognized but not implemented by this server. | --- ### kClientTimerInterval `static` `constexpr` ```cpp constexpr std::int64_t kClientTimerInterval = 30 * 1000 ``` [Defined in src/turn/include/icy/turn/client/client.h:114](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/client/client.h#L114) [Timer](https://auscaster.com/icey/docs/api-reference/icy-Timer.md#timer) interval for client maintenance (30 seconds) --- ### kClientDefaultLifetime `static` `constexpr` ```cpp constexpr std::int64_t kClientDefaultLifetime = 5 * 60 * 1000 ``` [Defined in src/turn/include/icy/turn/client/client.h:117](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/client/client.h#L117) Default client allocation lifetime (5 minutes, in milliseconds) --- ### kClientDefaultTimeout `static` `constexpr` ```cpp constexpr long kClientDefaultTimeout = 10 * 1000 ``` [Defined in src/turn/include/icy/turn/client/client.h:120](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/client/client.h#L120) Default client transaction timeout (10 seconds) --- ### kDefaultAllocationLifetime `static` `constexpr` ```cpp constexpr std::int64_t kDefaultAllocationLifetime = 10 * 60 * 1000 ``` [Defined in src/turn/include/icy/turn/iallocation.h:28](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/iallocation.h#L28) Default allocation lifetime: 10 minutes (in milliseconds) --- ### PERMISSION_LIFETIME `static` `constexpr` ```cpp constexpr int PERMISSION_LIFETIME = 5 * 60 * 1000 ``` [Defined in src/turn/include/icy/turn/permission.h:31](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/permission.h#L31) [Permission](https://auscaster.com/icey/docs/api-reference/icy-turn-Permission.md#permission) Lifetime MUST be 300 seconds (= 5 minutes). --- ### kServerDefaultLifetime `static` `constexpr` ```cpp constexpr uint32_t kServerDefaultLifetime = 2 * 60 * 1000 ``` [Defined in src/turn/include/icy/turn/server/server.h:37](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/server/server.h#L37) Default server allocation lifetime (2 minutes, in milliseconds) --- ### kServerMaxLifetime `static` `constexpr` ```cpp constexpr uint32_t kServerMaxLifetime = 15 * 60 * 1000 ``` [Defined in src/turn/include/icy/turn/server/server.h:40](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/server/server.h#L40) Maximum server allocation lifetime (15 minutes, in milliseconds) --- ### kServerMaxPermissions `static` `constexpr` ```cpp constexpr int kServerMaxPermissions = 10 ``` [Defined in src/turn/include/icy/turn/server/server.h:43](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/server/server.h#L43) Maximum number of permissions per allocation. --- ### kServerTimerInterval `static` `constexpr` ```cpp constexpr int kServerTimerInterval = 10 * 1000 ``` [Defined in src/turn/include/icy/turn/server/server.h:46](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/server/server.h#L46) [Server](https://auscaster.com/icey/docs/api-reference/icy-turn-Server.md#server-7) timer interval (10 seconds) --- ### kServerEarlyMediaBufferSize `static` `constexpr` ```cpp constexpr int kServerEarlyMediaBufferSize = 8192 ``` [Defined in src/turn/include/icy/turn/server/server.h:49](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/server/server.h#L49) Early media buffer size. --- ### kConnectionBindTimeout `static` `constexpr` ```cpp constexpr int kConnectionBindTimeout = 30 * 1000 ``` [Defined in src/turn/include/icy/turn/server/tcpconnectionpair.h:29](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/server/tcpconnectionpair.h#L29) ConnectionBind request timeout (30 seconds, in milliseconds) --- ### CLIENT_SOCK_BUF_SIZE `static` `constexpr` ```cpp constexpr int CLIENT_SOCK_BUF_SIZE = 65536 ``` [Defined in src/turn/include/icy/turn/types.h:24](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/types.h#L24) Default socket buffer size for TURN client sockets. --- ### SERVER_SOCK_BUF_SIZE `static` `constexpr` ```cpp constexpr int SERVER_SOCK_BUF_SIZE = CLIENT_SOCK_BUF_SIZE * 32 ``` [Defined in src/turn/include/icy/turn/types.h:25](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/types.h#L25) Default socket buffer size for TURN server sockets. --- ### kProtocolUDP `static` `constexpr` ```cpp constexpr uint8_t kProtocolUDP = 17 ``` [Defined in src/turn/include/icy/turn/types.h:28](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/types.h#L28) TURN protocol numbers. IP protocol number for UDP. --- ### kProtocolTCP `static` `constexpr` ```cpp constexpr uint8_t kProtocolTCP = 6 ``` [Defined in src/turn/include/icy/turn/types.h:29](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/types.h#L29) IP protocol number for TCP. --- ### kErrorTryAlternate `static` `constexpr` ```cpp constexpr int kErrorTryAlternate = 300 ``` [Defined in src/turn/include/icy/turn/types.h:32](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/types.h#L32) TURN/STUN error codes used in this module. [Client](https://auscaster.com/icey/docs/api-reference/icy-turn-Client.md#client-3) should retry against an alternate TURN server. --- ### kErrorBadRequest `static` `constexpr` ```cpp constexpr int kErrorBadRequest = 400 ``` [Defined in src/turn/include/icy/turn/types.h:33](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/types.h#L33) [Request](https://auscaster.com/icey/docs/api-reference/icy-turn-Request.md#request-14) was malformed or missing required attributes. --- ### kErrorNotAuthorized `static` `constexpr` ```cpp constexpr int kErrorNotAuthorized = 401 ``` [Defined in src/turn/include/icy/turn/types.h:34](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/types.h#L34) Authentication failed or credentials were not accepted. --- ### kErrorForbidden `static` `constexpr` ```cpp constexpr int kErrorForbidden = 403 ``` [Defined in src/turn/include/icy/turn/types.h:35](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/types.h#L35) [Request](https://auscaster.com/icey/docs/api-reference/icy-turn-Request.md#request-14) was understood but is not permitted for this client. --- ### kErrorUnknownAttribute `static` `constexpr` ```cpp constexpr int kErrorUnknownAttribute = 420 ``` [Defined in src/turn/include/icy/turn/types.h:36](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/types.h#L36) [Request](https://auscaster.com/icey/docs/api-reference/icy-turn-Request.md#request-14) included an unsupported comprehension-required attribute. --- ### kErrorUnsupportedTransport `static` `constexpr` ```cpp constexpr int kErrorUnsupportedTransport = 442 ``` [Defined in src/turn/include/icy/turn/types.h:37](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/types.h#L37) Requested transport protocol is not supported by the server. --- ### kErrorAllocationMismatch `static` `constexpr` ```cpp constexpr int kErrorAllocationMismatch = 437 ``` [Defined in src/turn/include/icy/turn/types.h:38](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/types.h#L38) [Client](https://auscaster.com/icey/docs/api-reference/icy-turn-Client.md#client-3) attempted an allocation operation that conflicts with existing state. --- ### kErrorStaleNonce `static` `constexpr` ```cpp constexpr int kErrorStaleNonce = 438 ``` [Defined in src/turn/include/icy/turn/types.h:39](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/types.h#L39) Authentication nonce expired and must be refreshed. --- ### kErrorWrongCredentials `static` `constexpr` ```cpp constexpr int kErrorWrongCredentials = 441 ``` [Defined in src/turn/include/icy/turn/types.h:40](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/types.h#L40) Supplied credentials were well formed but did not match the allocation. --- ### kErrorConnectionAlreadyExists `static` `constexpr` ```cpp constexpr int kErrorConnectionAlreadyExists = 446 ``` [Defined in src/turn/include/icy/turn/types.h:41](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/types.h#L41) TURN TCP connection binding already exists. --- ### kErrorConnectionTimeoutOrFailure `static` `constexpr` ```cpp constexpr int kErrorConnectionTimeoutOrFailure = 447 ``` [Defined in src/turn/include/icy/turn/types.h:42](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/types.h#L42) TURN TCP peer connection attempt timed out or failed. --- ### kErrorAllocationQuotaReached `static` `constexpr` ```cpp constexpr int kErrorAllocationQuotaReached = 486 ``` [Defined in src/turn/include/icy/turn/types.h:43](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/types.h#L43) User or server allocation quota was exceeded. --- ### kErrorInsufficientCapacity `static` `constexpr` ```cpp constexpr int kErrorInsufficientCapacity = 508 ``` [Defined in src/turn/include/icy/turn/types.h:44](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/types.h#L44) [Server](https://auscaster.com/icey/docs/api-reference/icy-turn-Server.md#server-7) lacks capacity to satisfy the request. --- ### kErrorOperationNotSupported `static` `constexpr` ```cpp constexpr int kErrorOperationNotSupported = 600 ``` [Defined in src/turn/include/icy/turn/types.h:45](https://github.com/auscaster/icey/blob/main/src/turn/include/icy/turn/types.h#L45) [Request](https://auscaster.com/icey/docs/api-reference/icy-turn-Request.md#request-14) is recognized but not implemented by this server.