59 lines
991 B
Go
59 lines
991 B
Go
package vmnet
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// #cgo CFLAGS: -x objective-c
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// #cgo LDFLAGS: -lobjc -framework vmnet
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// #include "vmnet.h"
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import "C"
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import (
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"io"
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"unsafe"
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)
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type VMNet struct {
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io.ReadWriter
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iface C.interface_ref
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mps C.ulonglong
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MaxPacketSize int
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}
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func (v *VMNet) Start(hostIface string) error {
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C._vmnet_start(&v.iface, C.CString(hostIface), &v.mps)
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if v.iface == nil {
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return ErrUnableToStart
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}
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v.MaxPacketSize = int(v.mps)
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return nil
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}
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func (v *VMNet) Stop() error {
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C._vmnet_stop(v.iface)
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return nil
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}
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func (v *VMNet) Read(p []byte) (n int, err error) {
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for {
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var cBytes unsafe.Pointer
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var cBytesLen C.ulong
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C._vmnet_read(v.iface, v.mps, &cBytes, &cBytesLen)
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if cBytes == nil {
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continue
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}
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copy(p, C.GoBytes(cBytes, C.int(cBytesLen)))
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return int(cBytesLen), nil
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}
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}
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func (v *VMNet) Write(p []byte) (n int, err error) {
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C._vmnet_write(v.iface, C.CBytes(p), C.ulong(len(p)))
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return len(p), nil
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}
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func New() *VMNet {
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return &VMNet{}
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}
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