Multi-NIC support:
- Add nodeNIC type and node.extraNICs for secondary network interfaces
- Add netForMAC/macForNet to route packets to the correct network by MAC
- Update initFromConfig to allocate a MAC + LAN IP per network
- Fix handleEthernetFrameFromVM, ServeUnixConn to use netForMAC
- Fix MACOfIP, writeEth, WriteUDPPacketNoNAT, gVisor write path, and
createARPResponse to use macForNet (return the MAC actually on that
network, not the node's primary MAC)
- Fix createDHCPResponse for multi-NIC (correct client IP and subnet)
- Add nodeNICMac for secondary NIC MAC generation
- Add Node accessors: NumNICs, NICMac, Networks, LanIP
DHCP fixes:
- Include LeaseTime, SubnetMask, Router, DNS in DHCP Offer (not just
Ack). systemd-networkd requires these to accept an Offer.
- Fix DHCP response source IP: use gateway IP instead of echoing
the request's destination (which was 255.255.255.255 for discovers)
New VIPs:
- cloud-init.tailscale: serves per-node cloud-init meta-data, user-data,
and network-config for VMs booting with nocloud datasource
- files.tailscale: serves binary files (tta, tailscale, tailscaled)
registered via RegisterFile for cloud VM provisioning
- Add ControlServer() accessor for test control server
This is necessary for a three-VM natlab subnet router
integration test, coming later.
Updates #13038
Change-Id: I59f9f356bae9b5509c117265237983972dfdd5af
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Brad Fitzpatrick
814161303f