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windows: add IP() accessor to SocketAddress type

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This is what everybody winds up doing with this object, so we make it
somewhat nicer than copying and pasting this everywhere or using type
aliases.

Change-Id: I3e12395cadfe212a7d01ce86478de9486383729a
Reviewed-on: https://go-review.googlesource.com/c/sys/+/178577
Run-TryBot: Jason Donenfeld <Jason@zx2c4.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Jason A. Donenfeld
2019-05-22 18:16:02 +02:00
committed by Brad Fitzpatrick
parent c3d486d151
commit dbbf3f1254
1 changed files with 15 additions and 1 deletions
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16
windows/types_windows.go
View File

@@ -4,7 +4,11 @@
package windows
import "syscall"
import (
"net"
"syscall"
"unsafe"
)
const (
// Invented values to support what package os expects.
@@ -1314,6 +1318,16 @@ type SocketAddress struct {
SockaddrLength int32
}
// IP returns an IPv4 or IPv6 address, or nil if the underlying SocketAddress is neither.
func (addr *SocketAddress) IP() net.IP {
if uintptr(addr.SockaddrLength) >= unsafe.Sizeof(RawSockaddrInet4{}) && addr.Sockaddr.Addr.Family == AF_INET {
return (*RawSockaddrInet4)(unsafe.Pointer(addr.Sockaddr)).Addr[:]
} else if uintptr(addr.SockaddrLength) >= unsafe.Sizeof(RawSockaddrInet6{}) && addr.Sockaddr.Addr.Family == AF_INET6 {
return (*RawSockaddrInet6)(unsafe.Pointer(addr.Sockaddr)).Addr[:]
}
return nil
}
type IpAdapterUnicastAddress struct {
Length uint32
Flags uint32