diff options
Diffstat (limited to 'tun/wintun/wintun_windows.go')
| -rw-r--r-- | tun/wintun/wintun_windows.go | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/tun/wintun/wintun_windows.go b/tun/wintun/wintun_windows.go index 81da251..f5d42eb 100644 --- a/tun/wintun/wintun_windows.go +++ b/tun/wintun/wintun_windows.go @@ -15,6 +15,7 @@ import ( "golang.org/x/sys/windows" "golang.org/x/sys/windows/registry" + "golang.zx2c4.com/wireguard/tun/wintun/iphlpapi" "golang.zx2c4.com/wireguard/tun/wintun/nci" registryEx "golang.zx2c4.com/wireguard/tun/wintun/registry" "golang.zx2c4.com/wireguard/tun/wintun/setupapi" @@ -528,11 +529,35 @@ func (wintun *Wintun) InterfaceName() (string, error) { func (wintun *Wintun) SetInterfaceName(ifname string) error { const maxSuffix = 1000 availableIfname := ifname +setloop: for i := 0; ; i++ { err := nci.SetConnectionName(&wintun.cfgInstanceID, availableIfname) if err == nil { break } + if err == windows.ERROR_DUP_NAME { + duplicateGuid, err2 := iphlpapi.InterfaceGUIDFromAlias(availableIfname) + if err2 == nil { + for j := 0; j < 1000; j++ { + proposal := fmt.Sprintf("%s %d", ifname, j+1) + if proposal == availableIfname { + continue + } + err2 = nci.SetConnectionName(duplicateGuid, proposal) + if err2 == windows.ERROR_DUP_NAME { + continue + } + if err2 == nil { + err = nci.SetConnectionName(&wintun.cfgInstanceID, availableIfname) + if err == nil { + break setloop + } + } + break + } + } + } + if i > maxSuffix || err != windows.ERROR_DUP_NAME { return fmt.Errorf("NciSetConnectionName failed: %v", err) } |