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cmd/derper: support forwarding packets amongst set of peer DERP servers

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Updates #388

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2020-06-03 14:42:20 -07:00
committed by Brad Fitzpatrick
parent e441d3218e
commit 1cb7dab881
7 changed files with 549 additions and 26 deletions
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derp/derp.go
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@@ -72,6 +72,7 @@ const (
frameClientInfo = frameType(0x02) // 32B pub key + 24B nonce + naclbox(json)
frameServerInfo = frameType(0x03) // 24B nonce + naclbox(json)
frameSendPacket = frameType(0x04) // 32B dest pub key + packet bytes
frameForwardPacket = frameType(0x0a) // 32B src pub key + 32B dst pub key + packet bytes
frameRecvPacket = frameType(0x05) // v0/1: packet bytes, v2: 32B src pub key + packet bytes
frameKeepAlive = frameType(0x06) // no payload, no-op (to be replaced with ping/pong)
frameNotePreferred = frameType(0x07) // 1 byte payload: 0x01 or 0x00 for whether this is client's home node