Function convertAddr

pkg/sentry/socket/netstack/stack.go:613–650

convertAddr converts an InterfaceAddr to a ProtocolAddress.

(addr inet.InterfaceAddr)

// convertAddr converts an InterfaceAddr to a ProtocolAddress.
func convertAddr(addr inet.InterfaceAddr) (tcpip.ProtocolAddress, error) {
	var (
		protocol        tcpip.NetworkProtocolNumber
		address         tcpip.Address
		protocolAddress tcpip.ProtocolAddress
	)
	switch addr.Family {
	case linux.AF_INET:
		if len(addr.Addr) != header.IPv4AddressSize {
			return protocolAddress, linuxerr.EINVAL
		}
		if addr.PrefixLen > header.IPv4AddressSize*8 {
			return protocolAddress, linuxerr.EINVAL
		}
		protocol = ipv4.ProtocolNumber
		address = tcpip.AddrFrom4Slice(addr.Addr)
	case linux.AF_INET6:
		if len(addr.Addr) != header.IPv6AddressSize {
			return protocolAddress, linuxerr.EINVAL
		}
		if addr.PrefixLen > header.IPv6AddressSize*8 {
			return protocolAddress, linuxerr.EINVAL
		}
		protocol = ipv6.ProtocolNumber
		address = tcpip.AddrFrom16Slice(addr.Addr)
	default:
		return protocolAddress, linuxerr.ENOTSUP
	}

	protocolAddress = tcpip.ProtocolAddress{
		Protocol: protocol,
		AddressWithPrefix: tcpip.AddressWithPrefix{
			Address:   address,
			PrefixLen: int(addr.PrefixLen),
		},
	}
	return protocolAddress, nil
}

// AddInterfaceAddr implements inet.Stack.AddInterfaceAddr.
func (s *Stack) AddInterfaceAddr(idx int32, addr inet.InterfaceAddr) error {