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tailscale/wgengine/router
Nick Khyl 1608831c33 wgengine/router: use quad-100 as the nexthop on Windows
Windows requires routes to have a nexthop. Routes created using the interface's local IP address or an unspecified IP address ("0.0.0.0" or "::") as the nexthop are considered on-link routes. Notably, Windows treats on-link subnet routes differently, reserving the last IP in the range as the broadcast IP and therefore prohibiting TCP connections to it, resulting in WSA error 10049: "The requested address is not valid in its context. This does not happen with single-host routes, such as routes to Tailscale IP addresses, but becomes a problem with advertised subnets when all IPs in the range should be reachable.

Before Windows 8, only routes created with an unspecified IP address were considered on-link, so our previous approach of using the interface's own IP as the nexthop likely worked on Windows 7.

This PR updates configureInterface to use the TailscaleServiceIP (100.100.100.100) and its IPv6 counterpart as the nexthop for subnet routes.

Fixes tailscale/support-escalations#57

Signed-off-by: Nick Khyl <nickk@tailscale.com>
4 months ago
..
callback.go
consolidating_router.go wgengine/router: consolidate routes before reconfiguring router for mobile clients 6 months ago
consolidating_router_test.go
ifconfig_windows.go wgengine/router: use quad-100 as the nexthop on Windows 4 months ago
ifconfig_windows_test.go
router.go various: implement stateful firewalling on Linux (#12025) 6 months ago
router_darwin.go
router_default.go
router_fake.go
router_freebsd.go
router_linux.go health: begin work to use structured health warnings instead of strings, pipe changes into ipn.Notify (#12406) 5 months ago
router_linux_test.go wgengine/router: print Docker warning when stateful filtering is enabled 6 months ago
router_openbsd.go
router_test.go various: implement stateful firewalling on Linux (#12025) 6 months ago
router_userspace_bsd.go
router_windows.go cmd/tailscaled, net/dns, wgengine/router: start Windows child processes with DETACHED_PROCESS when I/O is being piped 5 months ago
router_windows_test.go
runner.go