windows - 为什么我的 UPnP 设备不返回在 UPnP SCPD xml 文件中注册的服务？

Question

我注册了一个 UPnP 设备:

var o: IUPnPRegistrar;
    W: string;
    R: HRESULT;
begin
  w := TFile.ReadAllText('UPnPDevice_Desc.xml');
  o := CoUPnPRegistrar.Create as IUPnPRegistrar;
  R := o.RegisterDevice(w, ...);
end;

文件 UPnPDevice_Desc.xml:

<?xml version="1.0"?>
<root xmlns="urn:schemas-upnp-org:device-1-0">
<specVersion>
    <major>1</major>
    <minor>0</minor>
</specVersion>

<device>
    <pnpx:X_deviceCategory xmlns:pnpx="http://schemas.microsoft.com/windows/pnpx/2005/11">Other</pnpx:X_deviceCategory>
<!--<pnpx:X_hardwareId xmlns:pnpx="http://schemas.microsoft.com/windows/pnpx/2005/11">Microsoft/SampleDevice/10000/urn:microsoft-com:device:SampleDimmerDevice:1</pnpx:X_hardwareId>-->
<!--    <df:X_containerId xmlns:df="http://schemas.microsoft.com/windows/2008/09/devicefoundation">{8C7B310D-90F8-40D4-B5EA-71D81821DEA6}</df:X_containerId>-->
    <deviceType>urn:example-com:device:uPnPDevice:1</deviceType>
    <friendlyName>My UPNP Device Hosted by Windows</friendlyName>
    <manufacturer>Example Company</manufacturer>
    <manufacturerURL>http://www.example.com/</manufacturerURL>
    <modelDescription>My UPnP Device</modelDescription>
    <modelName>uPnPDevice</modelName>
    <modelNumber>1001</modelNumber>
    <modelURL>http://www.example.com/</modelURL>
    <serialNumber>123456</serialNumber>
    <UDN>uuid:RootDevice</UDN>
    <UPC>00000-00001</UPC>

    <serviceList>
      <service>
        <serviceType>urn:schemas-upnp-org:service:SwitchPower:1</serviceType>
        <serviceId>urn:upnp-org:serviceId:SwitchPower:1</serviceId>
        <controlURL></controlURL>
        <eventSubURL></eventSubURL>
        <SCPDURL>UPnPDevice_SCPD.xml</SCPDURL>
      </service>
    </serviceList>

    <presentationURL>DimmerPresentation.htm</presentationURL>
</device>
</root>

文件 UPnPDevice_SCPD.xml:

<scpd xmlns="urn:schemas-upnp-org:service-1-0">
<specVersion>
    <major>1</major>
    <minor>0</minor>
</specVersion>
<actionList>
    <action>
        <name>MagicOn</name>
    </action>
</actionList>
<serviceStateTable>
    <stateVariable>
        <name>OSMajorVersion</name>
        <dataType>i4</dataType>
    </stateVariable>
    <stateVariable>
        <name>OSMinorVersion</name>
        <dataType>i4</dataType>
    </stateVariable>
    <stateVariable>
        <name>OSBuildNumber</name>
        <dataType>i4</dataType>
    </stateVariable>
    <stateVariable>
        <name>OSMachineName</name>
        <dataType>string</dataType>
    </stateVariable>
</serviceStateTable>
</scpd>

我可以通过使用 IUPnPDeviceFinder 或 M-SEARCH 查找设备来确认 UPnP 设备已托管在 UPnP 设备主机服务中。

注册表

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\UPnP Device Host\Description

还包含相应的信息:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\UPnP Device Host\Description\{00BB4949-F3B2-4F5A-B534-C6FE61B71F4E}]

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\UPnP Device Host\Description\{00BB4949-F3B2-4F5A-B534-C6FE61B71F4E}\Files]

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\UPnP Device Host\Description\{00BB4949-F3B2-4F5A-B534-C6FE61B71F4E}\Files\{B11E040A-6858-48BA-B1BD-85B4E8FCBA73}]
"Filename"="M:\\uPNP\\D16\\Win32\\Debug\\UPnPDevice_SCPD.xml"
"Mimetype"="text/xml; charset=\"utf-8\""

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\UPnP Device Host\Description\{00BB4949-F3B2-4F5A-B534-C6FE61B71F4E}\UDN Mappings]

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\UPnP Device Host\Description\{00BB4949-F3B2-4F5A-B534-C6FE61B71F4E}\UDN Mappings\uuid:RootDevice]
@="uuid:00bb4949-f3b2-4f5a-b534-c6fe61b71f4e"

使用UPnP设备查询服务时

var Enum: IEnumVARIANT;
    Fetched: Cardinal;
    K: OleVariant;
    P: IUPnPService;
    W: WideString;
    D: IUPnPDevice
begin
  ...
  if D.Services.Count > 0 then begin
    Enum := D.Services._NewEnum as IEnumVARIANT;
    Enum.Reset;
    while Enum.Next(1, K, Fetched) = S_OK do begin
      P := IDispatch(K) as IUPnPService;
    end;
  end;
end;

D.Services.Count 为 1，但 Enum 未获取任何服务。获取的变量始终返回 0。

如果我查询 Media Player UPnP 设备，它会返回可用的服务。

我的 UPnP 设备没有按照 SCPD xml 文件中的指示返回服务有什么问题吗？

注册设备后，XML 描述将更改为:

<root xmlns="urn:schemas-upnp-org:device-1-0">
    <specVersion>
        <major>1</major>
        <minor>0</minor>
    </specVersion>

    <device>
        <pnpx:X_deviceCategory xmlns:pnpx="http://schemas.microsoft.com/windows/pnpx/2005/11">Other</pnpx:X_deviceCategory>
<!--
<pnpx:X_hardwareId xmlns:pnpx="http://schemas.microsoft.com/windows/pnpx/2005/11">Microsoft/SampleDevice/10000/urn:microsoft-com:device:SampleDimmerDevice:1</pnpx:X_hardwareId>
-->
<!--
<df:X_containerId xmlns:df="http://schemas.microsoft.com/windows/2008/09/devicefoundation">{8C7B310D-90F8-40D4-B5EA-71D81821DEA6}</df:X_containerId>
-->
        <deviceType>urn:example-com:device:uPnPDevice:1</deviceType>
            <friendlyName>My UPNP Device Hosted by Windows</friendlyName>
            <manufacturer>Example Company</manufacturer>
            <manufacturerURL>http://www.example.com/</manufacturerURL>
            <modelDescription>My UPnP Device</modelDescription>
            <modelName>uPnPDevice</modelName>
            <modelNumber>1001</modelNumber>
            <modelURL>http://www.example.com/</modelURL>
            <serialNumber>123456</serialNumber>
            <UDN>uuid:9742f52d-f39f-4eaf-9ecf-bb742e9d79e9</UDN>
            <UPC>00000-00001</UPC>
            <serviceList>
                <service>
                    <serviceType>urn:schemas-upnp-org:service:SwitchPower:1</serviceType>
                    <serviceId>urn:upnp-org:serviceId:SwitchPower:1</serviceId>
                    <controlURL>
                        /upnphost/udhisapi.dll?control=uuid:9742f52d-f39f-4eaf-9ecf-bb742e9d79e9+urn:upnp-org:serviceId:SwitchPower:1
                    </controlURL>
                    <eventSubURL>
                        /upnphost/udhisapi.dll?event=uuid:9742f52d-f39f-4eaf-9ecf-bb742e9d79e9+urn:upnp-org:serviceId:SwitchPower:1
                    </eventSubURL>
                    <SCPDURL>
                        /upnphost/udhisapi.dll?content=uuid:40c39217-e93b-4d0a-b5e0-abc582b2a2ed
                    </SCPDURL>
                </service>
            </serviceList>
        <presentationURL>
            /uuid:9742f52d-f39f-4eaf-9ecf-bb742e9d79e9/DimmerPresentation.htm?/upnphost/udhisapi.dll?content=uuid:9742f52d-f39f-4eaf-9ecf-bb742e9d79e9+uuid:9742f52d-f39f-4eaf-9ecf-bb742e9d79e9
        </presentationURL>
    </device>
</root>

请注意 controlURL、eventSubURL 和 SCPDURL 已更改。正在访问

http://localhost:2869/upnphost/udhisapi.dll?content=uuid:40c39217-e93b-4d0a-b5e0-abc582b2a2ed

返回文件 UPnPDevice_SCPD.xml 的确切内容。

Answer 1

SCPD文件必须添加XML声明。例如:<?xml version="1.0"?>

<?xml version="1.0"?>
<scpd xmlns="urn:schemas-upnp-org:service-1-0">
...
</scpd>