TsgcTURNClient › Properties › RetransmissionOptions

RetransmissionOptions Property

UDP retransmission settings (RTO and MaxRetries) used to resend TURN requests when no response arrives.

Syntax

property RetransmissionOptions: TsgcSTUNPRetransmissionClient_Options read FRetransmissionOptions write SetRetransmissionOptions;

Default Value

—

Remarks

UDP does not guarantee delivery, so TURN clients must retransmit ALLOCATE, REFRESH, CreatePermission and ChannelBind requests until a response arrives or a maximum number of retries is reached. This property only applies when Transport is stUDP; TCP and TLS rely on the transport for reliability.

• Enabled: turns the retransmission mechanism on or off.
• RTO: initial retransmission timeout in milliseconds (default 500). Requests are sent at 0, RTO, 3*RTO, 7*RTO, 15*RTO, 31*RTO and 63*RTO ms.
• MaxRetries: maximum number of retransmissions before giving up (default 7).

Example

oTURN.Transport := stUDP;
oTURN.RetransmissionOptions.Enabled := True;
oTURN.RetransmissionOptions.RTO := 500;
oTURN.RetransmissionOptions.MaxRetries := 7;
oTURN.Allocate;

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