mirror of
https://github.com/Control-D-Inc/ctrld.git
synced 2026-02-03 22:18:39 +00:00
af4b826b68
Previously, a valid interfaces map is only meaningful on Windows and Darwin, where ctrld needs to set DNS for all physical interfaces. With new network monitor, the valid interfaces is used for checking new changes, thus we have to implement the valid interfaces map for all systems. - On Linux, just retrieving all non-virtual interfaces. - On others, fallback to use default route interface only.
53 lines
1.3 KiB
Go
53 lines
1.3 KiB
Go
package cli
|
|
|
|
import (
|
|
"net"
|
|
"net/netip"
|
|
"os"
|
|
"strings"
|
|
|
|
"tailscale.com/net/netmon"
|
|
)
|
|
|
|
func patchNetIfaceName(iface *net.Interface) (bool, error) { return true, nil }
|
|
|
|
// validInterface reports whether the *net.Interface is a valid one.
|
|
// Only non-virtual interfaces are considered valid.
|
|
func validInterface(iface *net.Interface, validIfacesMap map[string]struct{}) bool {
|
|
_, ok := validIfacesMap[iface.Name]
|
|
return ok
|
|
}
|
|
|
|
// validInterfacesMap returns a set containing non virtual interfaces.
|
|
func validInterfacesMap() map[string]struct{} {
|
|
m := make(map[string]struct{})
|
|
vis := virtualInterfaces()
|
|
netmon.ForeachInterface(func(i netmon.Interface, prefixes []netip.Prefix) {
|
|
if _, existed := vis[i.Name]; existed {
|
|
return
|
|
}
|
|
m[i.Name] = struct{}{}
|
|
})
|
|
// Fallback to default route interface if found nothing.
|
|
if len(m) == 0 {
|
|
defaultRoute, err := netmon.DefaultRoute()
|
|
if err != nil {
|
|
return m
|
|
}
|
|
m[defaultRoute.InterfaceName] = struct{}{}
|
|
}
|
|
return m
|
|
}
|
|
|
|
// virtualInterfaces returns a map of virtual interfaces on current machine.
|
|
func virtualInterfaces() map[string]struct{} {
|
|
s := make(map[string]struct{})
|
|
entries, _ := os.ReadDir("/sys/devices/virtual/net")
|
|
for _, entry := range entries {
|
|
if entry.IsDir() {
|
|
s[strings.TrimSpace(entry.Name())] = struct{}{}
|
|
}
|
|
}
|
|
return s
|
|
}
|