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LinuxTap, bugfix

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This commit is contained in:
KusakabeSi 2021-08-24 13:26:20 +00:00
parent d717d35f64
commit 6b563b5ad5
2 changed files with 48 additions and 4 deletions
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2
main_edge.go
View File

@ -176,6 +176,8 @@ func Edge(configPath string, useUAPI bool, printExample bool) (err error) {
thetap, err = tap.CreateUDPSockTAP(tconfig.Interface, lis, sen)
case "vpp":
thetap, err = tap.CreateVppTAP(tconfig.Interface, tconfig.LogLevel.LogLevel)
case "tap":
thetap, err = tap.CreateTAP(tconfig.Interface)
default:
return errors.New("Unknow interface type:" + tconfig.Interface.Itype)
}

50
tap/tap_linux.go
View File

@ -212,16 +212,53 @@ func (tap *NativeTap) setMacAddr(mac MacAddress) (err error) {
ifreq = struct.pack('16sH6B8x', self.name, AF_UNIX, *macbytes)
fcntl.ioctl(sockfd, SIOCSIFHWADDR, ifreq)
*/
copy(ifr[:16], name)
binary.BigEndian.PutUint16(ifr[16:18], unix.AF_UNIX)
copy(ifr[18:24], mac[:])
copy(ifr[24:32], make([]byte, 8))
copy(ifr[:unix.IFNAMSIZ], name)
binary.LittleEndian.PutUint16(ifr[unix.IFNAMSIZ:unix.IFNAMSIZ+2], unix.AF_UNIX)
copy(ifr[unix.IFNAMSIZ+2:unix.IFNAMSIZ+8], mac[:])
_, _, err = unix.Syscall(
unix.SYS_IOCTL,
uintptr(fd),
uintptr(unix.SIOCSIFHWADDR),
uintptr(unsafe.Pointer(&ifr[0])),
)
if err.(syscall.Errno) == syscall.Errno(0) {
err = nil
}
return
}
func (tap *NativeTap) setUp() (err error) {
fd, err := unix.Socket(
unix.AF_INET,
unix.SOCK_DGRAM,
0,
)
if err != nil {
return err
}
defer unix.Close(fd)
var ifr [ifReqSize]byte
name, err := tap.Name()
if err != nil {
return err
}
/*
ifreq = struct.pack('16sH6B8x', self.name, AF_UNIX, *macbytes)
fcntl.ioctl(sockfd, SIOCSIFHWADDR, ifreq)
*/
flags := uint16(unix.IFF_UP)
copy(ifr[:unix.IFNAMSIZ], name)
binary.LittleEndian.PutUint16(ifr[unix.IFNAMSIZ:unix.IFNAMSIZ+2], unix.AF_UNIX)
binary.LittleEndian.PutUint16(ifr[unix.IFNAMSIZ+2:unix.IFNAMSIZ+4], flags)
_, _, err = unix.Syscall(
unix.SYS_IOCTL,
uintptr(fd),
uintptr(unix.SIOCSIFFLAGS),
uintptr(unsafe.Pointer(&ifr[0])),
)
if err.(syscall.Errno) == syscall.Errno(0) {
err = nil
}
return
}
@ -506,6 +543,11 @@ func CreateTAPFromFile(file *os.File, iconfig config.InterfaceConf) (Device, err
unix.Close(tap.netlinkSock)
return nil, err
}
err = tap.setUp()
if err != nil {
unix.Close(tap.netlinkSock)
return nil, err
}
return tap, nil
}