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Code Issues Releases Wiki Activity

A bit more messing with tun_dragonfly

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This commit is contained in:
Brady OBrien 2018-05-25 20:43:22 -05:00
parent de4c43207b
commit e3eae3bc01
1 changed files with 14 additions and 2 deletions
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16
tun/tun_dragonfly.go
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@ -23,6 +23,8 @@ import (
const _TUNSIFHEAD = 0x80047460
const _TUNSIFMODE = 0x8004745e
const _TUNSIFPID = 0x2000745f
const _FIONBIO = 0x8004667e
const _FIOASYNC = 0x8004667d
// Iface status string max len
const _IFSTATMAX = 800
@ -269,9 +271,19 @@ func CreateTUN(name string, mtu int) (TUNDevice, error) {
return nil, err
}
var errno syscall.Errno;
ifbiomode := 1
_, _, errno = unix.Syscall(
unix.SYS_IOCTL,
uintptr(tunfd),
uintptr(_FIOASYNC),
uintptr(unsafe.Pointer(&ifbiomode)),
)
// Enable ifhead mode, otherwise tun will complain if it gets a non-AF_INET packet
ifheadmode := 1
_, _, errno := unix.Syscall(
_, _, errno = unix.Syscall(
unix.SYS_IOCTL,
uintptr(tunfd),
uintptr(_TUNSIFHEAD),
@ -390,7 +402,7 @@ func (tun *nativeTun) doRead(buff []byte, offset int) (int, error) {
default:
buff := buff[offset-4:]
n, err := tun.fd.Read(buff[:])
if n < 4 {
if n < 4 && n > 0{
return 0, err
}
return n - 4, err