TsgcSTUNClient › Properties › RetransmissionOptions

RetransmissionOptions Property

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

Syntax

property RetransmissionOptions: TsgcSTUNPRetransmissionClient_Options read FRetransmissionOptions write SetRetransmissionOptions;

Default Value

—

Remarks

UDP does not guarantee delivery, so STUN clients must retransmit requests until a response arrives or a maximum number of retries is reached. This property only applies when Transport is stUDP.

• 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

oSTUN.Transport := stUDP;
oSTUN.RetransmissionOptions.Enabled := True;
oSTUN.RetransmissionOptions.RTO := 500;
oSTUN.RetransmissionOptions.MaxRetries := 7;
oSTUN.SendRequest;

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