RepoMirrors/netlink
1
0
Fork 0
mirror of https://github.com/vishvananda/netlink synced 2025-01-25 08:54:08 +00:00
Code Issues Packages Projects Releases Wiki Activity

Tuntap: support for non-default flags (#154)

Browse Source 
* Tuntap: support for non-default flags

* Tuntap: tap device with default flags if no flags are provided
This commit is contained in:
Lukas Redynk 2016-07-29 17:59:01 +02:00 committed by Vish Ishaya
parent e73bad418f
commit 4e67e44a40
2 changed files with 17 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
link.go
View File

@ -171,11 +171,13 @@ func (macvtap Macvtap) Type() string {
}
type TuntapMode uint16
type TuntapFlag uint16
// Tuntap links created via /dev/tun/tap, but can be destroyed via netlink
type Tuntap struct {
LinkAttrs
Mode TuntapMode
Mode TuntapMode
Flags TuntapFlag
}
func (tuntap *Tuntap) Attrs() *LinkAttrs {

22
link_linux.go
View File

@ -16,8 +16,13 @@ import (
const SizeofLinkStats = 0x5c
const (
TUNTAP_MODE_TUN TuntapMode = syscall.IFF_TUN
TUNTAP_MODE_TAP TuntapMode = syscall.IFF_TAP
TUNTAP_MODE_TUN TuntapMode = syscall.IFF_TUN
TUNTAP_MODE_TAP TuntapMode = syscall.IFF_TAP
TUNTAP_DEFAULTS TuntapFlag = syscall.IFF_TUN_EXCL | syscall.IFF_ONE_QUEUE
TUNTAP_VNET_HDR TuntapFlag = syscall.IFF_VNET_HDR
TUNTAP_TUN_EXCL TuntapFlag = syscall.IFF_TUN_EXCL
TUNTAP_NO_PI TuntapFlag = syscall.IFF_NO_PI
TUNTAP_ONE_QUEUE TuntapFlag = syscall.IFF_ONE_QUEUE
)
var native = nl.NativeEndian()
@ -552,9 +557,7 @@ func (h *Handle) LinkAdd(link Link) error {
if tuntap, ok := link.(*Tuntap); ok {
// TODO: support user
// TODO: support group
// TODO: support non- one_queue
// TODO: support pi | vnet_hdr | multi_queue
// TODO: support non- exclusive
// TODO: multi_queue
// TODO: support non- persistent
if tuntap.Mode < syscall.IFF_TUN || tuntap.Mode > syscall.IFF_TAP {
return fmt.Errorf("Tuntap.Mode %v unknown!", tuntap.Mode)
@ -565,10 +568,13 @@ func (h *Handle) LinkAdd(link Link) error {
}
defer file.Close()
var req ifReq
req.Flags |= syscall.IFF_ONE_QUEUE
req.Flags |= syscall.IFF_TUN_EXCL
copy(req.Name[:15], base.Name)
if tuntap.Flags == 0 {
req.Flags = uint16(TUNTAP_DEFAULTS)
} else {
req.Flags = uint16(tuntap.Flags)
}
req.Flags |= uint16(tuntap.Mode)
copy(req.Name[:15], base.Name)
_, _, errno := syscall.Syscall(syscall.SYS_IOCTL, file.Fd(), uintptr(syscall.TUNSETIFF), uintptr(unsafe.Pointer(&req)))
if errno != 0 {
return fmt.Errorf("Tuntap IOCTL TUNSETIFF failed, errno %v", errno)