5 Commits (cfb5bd0559fcb82d18653a3bcfd32b2d63801c34)

Author	SHA1	Message	Date
Mihai Parparita	a9f32656f5	control/controlhttp: allow client and server to communicate over WebSockets ... We can't do Noise-over-HTTP in Wasm/JS (because we don't have bidirectional communication), but we should be able to do it over WebSockets. Reuses derp WebSocket support that allows us to turn a WebSocket connection into a net.Conn. Updates #3157 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
David Anderson	f570372b4d	control/controlbase: don't enforce a max protocol version at handshake time. ... Doing so makes development unpleasant, because we have to first break the client by bumping to a version the control server rejects, then upgrade the control server to make it accept the new version. This strict rejection at handshake time is only necessary if we want to blocklist some vulnerable protocol versions in the future. So, switch to a default-permissive stance: until we have such a version that we have to eagerly block early, we'll accept whatever version the client presents, and leave it to the user of controlbase.Conn to make decisions based on that version. Noise still enforces that the client and server *agree* on what protocol version is being used, and the control server still has the option to finish the handshake and then hang up with an in-noise error, rather than abort at the handshake level. Updates #3488 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	02ad987e24	control/controlbase: make the protocol version number selectable. ... This is so that we can plumb our client capability version through the protocol as the Noise version. The capability version increments more frequently than strictly required (the Noise version only needs to change when cryptographically-significant changes are made to the protocol, whereas the capability version also indicates changes in non-cryptographically-significant parts of the protocol), but this gives us a safe pre-auth way to determine if the client supports future protocol features, while still relying on Noise's strong assurance that the client and server have agreed on the same version. Currently, the server executes the same protocol regardless of the version number, and just presents the version to the caller so they can do capability-based things in the upper RPC protocol. In future, we may add a ratchet to disallow obsolete protocols, or vary the Noise handshake behavior based on requested version. Updates #3488 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	b647977b33	net/netutil: move some net utils from control/controlhttp to netutil ... In prep for reuse elsewhere. Change-Id: I1b804edf76ac66b9108e6f434e77eab7a7472d69 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	96f008cf87	control/controlhttp: package to get a controlbase.Conn over HTTP(S). ... Updates #3488 Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago