38 lines
1.3 KiB
Markdown
38 lines
1.3 KiB
Markdown
# NAT Traversal
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P2PRC currently supports TURN for NAT traversal.
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## TURN
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The current TURN implementation used is FRP. The TURN server is also required when
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a P2PRC node is acting as a Server. The TURN server is determined based on the Node
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with the least amount of latency based on the Nodes available on the IPTable.
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Once a TURN server is determined there are 2 actions performed. The first one is
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```/FRPPort``` to the TURN server to receive a port which is used to generate the external
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port from the TURN server. The flow below describes the workflow.
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### Client mode
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- Call ```/FRPPort```
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```
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http://<turn server ip>:<server port no>/FRPport
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```
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- Call the TURN server in the following manner. The following is a sample code snippet below.
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```go
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import (
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"github.com/Akilan1999/p2p-rendering-computation/p2p/frp"
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)
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func main() {
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serverPort, err := frp.GetFRPServerPort("http://" + <lowestLatencyIpAddress.Ipv4> + ":" + lowestLatencyIpAddress.ServerPort)
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if err != nil {
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return nil, err
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}
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// Create 1 second delay to allow FRP server to start
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time.Sleep(1 * time.Second)
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// Starts FRP as a client with
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proxyPort, err := frp.StartFRPClientForServer(<lowestLatencyIpAddress.Ipv4>, serverPort, <the port you want to expose externally>)
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if err != nil {
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return nil, err
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}
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}
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```
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