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freebsd: ignore IPv6 for now

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FreeBSD tun devices don't work with the way we implement IPv6
https://github.com/tailscale/tailscale/issues/1307

At least for now, remove any IPv6 addresses from the netmap.

Signed-off-by: Denton Gentry <dgentry@tailscale.com>
This commit is contained in:
Denton Gentry
2021-03-03 11:34:37 -08:00
committed by Denton Gentry
parent 524fb2c190
commit 061422affc
5 changed files with 108 additions and 0 deletions
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32
wgengine/router/router_userspace_bsd.go
View File

@ -10,6 +10,7 @@ import (
"fmt"
"log"
"os/exec"
"runtime"
"github.com/tailscale/wireguard-go/device"
"github.com/tailscale/wireguard-go/tun"
@ -101,9 +102,40 @@ func inet(p netaddr.IPPrefix) string {
return "inet"
}
// See https://github.com/tailscale/tailscale/issues/1307#issuecomment-786045280
// Remove all IPv6 entries.
func (r *userspaceBSDRouter) modifiedConfigForFreeBSDBugWorkaround(cfg *Config) *Config {
n := cfg.Clone()
n.LocalAddrs = n.LocalAddrs[:0]
for _, addr := range cfg.LocalAddrs {
if !addr.IP.Is6() {
n.LocalAddrs = append(n.LocalAddrs, addr)
}
}
n.Routes = n.Routes[:0]
for _, addr := range cfg.Routes {
if !addr.IP.Is6() {
n.Routes = append(n.Routes, addr)
}
}
n.SubnetRoutes = n.SubnetRoutes[:0]
for _, addr := range cfg.SubnetRoutes {
if !addr.IP.Is6() {
n.SubnetRoutes = append(n.SubnetRoutes, addr)
}
}
return n
}
func (r *userspaceBSDRouter) Set(cfg *Config) (reterr error) {
if cfg == nil {
cfg = &shutdownConfig
} else if runtime.GOOS == "freebsd" {
cfg = r.modifiedConfigForFreeBSDBugWorkaround(cfg)
}
var errq error