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// Package vsock provides the Linux guest bindings to VM sockets. VM
// sockets are a generic mechanism for guest<->host communication. It
// was originally developed for VMware but now also supports virtio
// sockets and (soon) Hyper-V sockets.
//
// The main purpose is to provide bindings to the Linux implementation
// of VM sockets, based on the low level support in
// golang.org/x/sys/unix.
//
// The package also provides bindings to the host interface to virtio
// sockets for HyperKit on macOS.
package vsock
import (
"fmt"
"net"
"os"
)
const (
// CIDAny is a wildcard CID
CIDAny = 4294967295 // 2^32-1
// CIDHypervisor is the reserved CID for the Hypervisor
CIDHypervisor = 0
// CIDHost is the reserved CID for the host system
CIDHost = 2
)
// Addr represents the address of a vsock end point.
type Addr struct {
CID uint32
Port uint32
}
// Network returns the network type for a Addr
func (a Addr) Network() string {
return "vsock"
}
// String returns a string representation of a Addr
func (a Addr) String() string {
return fmt.Sprintf("%08x.%08x", a.CID, a.Port)
}
// Conn is a vsock connection which supports half-close.
type Conn interface {
net.Conn
CloseRead() error
CloseWrite() error
File() (*os.File, error)
}
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