diff options
Diffstat (limited to 'vendor/golang.org/x/net/ipv4/control_pktinfo.go')
| -rw-r--r-- | vendor/golang.org/x/net/ipv4/control_pktinfo.go | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/vendor/golang.org/x/net/ipv4/control_pktinfo.go b/vendor/golang.org/x/net/ipv4/control_pktinfo.go index 9ed977341..425338f35 100644 --- a/vendor/golang.org/x/net/ipv4/control_pktinfo.go +++ b/vendor/golang.org/x/net/ipv4/control_pktinfo.go @@ -7,19 +7,18 @@ package ipv4 import ( - "syscall" + "net" "unsafe" "golang.org/x/net/internal/iana" + "golang.org/x/net/internal/socket" ) func marshalPacketInfo(b []byte, cm *ControlMessage) []byte { - m := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0])) - m.Level = iana.ProtocolIP - m.Type = sysIP_PKTINFO - m.SetLen(syscall.CmsgLen(sizeofInetPktinfo)) + m := socket.ControlMessage(b) + m.MarshalHeader(iana.ProtocolIP, sysIP_PKTINFO, sizeofInetPktinfo) if cm != nil { - pi := (*inetPktinfo)(unsafe.Pointer(&b[syscall.CmsgLen(0)])) + pi := (*inetPktinfo)(unsafe.Pointer(&m.Data(sizeofInetPktinfo)[0])) if ip := cm.Src.To4(); ip != nil { copy(pi.Spec_dst[:], ip) } @@ -27,11 +26,14 @@ func marshalPacketInfo(b []byte, cm *ControlMessage) []byte { pi.setIfindex(cm.IfIndex) } } - return b[syscall.CmsgSpace(sizeofInetPktinfo):] + return m.Next(sizeofInetPktinfo) } func parsePacketInfo(cm *ControlMessage, b []byte) { pi := (*inetPktinfo)(unsafe.Pointer(&b[0])) cm.IfIndex = int(pi.Ifindex) - cm.Dst = pi.Addr[:] + if len(cm.Dst) < net.IPv4len { + cm.Dst = make(net.IP, net.IPv4len) + } + copy(cm.Dst, pi.Addr[:]) } |