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SDK FAQ集

                <font color="#2040a0">DWORD</font> <font color="#2040a0">ipRouteEntryBufSize</font> <font color="4444FF">=</font> <strong>sizeof</strong><font color="4444FF">(</font><font color="#2040a0">IPRouteEntry</font><font color="4444FF">)</font> <font color="4444FF">*</font>
                    <font color="#2040a0">ipSnmpInfo</font>.<font color="#2040a0">ipsi_numroutes</font><font color="4444FF">;</font>
                <font color="#2040a0">IPRouteEntry</font> <font color="4444FF">*</font><font color="#2040a0">ipRouteEntry</font> <font color="4444FF">=</font> <font color="4444FF">(</font><font color="#2040a0">IPRouteEntry</font>
                                              <font color="4444FF">*</font><font color="4444FF">)</font>
                    <font color="#2040a0">calloc</font><font color="4444FF">(</font><font color="#2040a0">ipRouteEntryBufSize</font>, <font color="#FF0000">1</font><font color="4444FF">)</font><font color="4444FF">;</font>

                <font color="#2040a0">result</font> <font color="4444FF">=</font> <font color="#2040a0">WsControl</font><font color="4444FF">(</font><font color="#2040a0">IPPROTO_TCP</font>,
                                   <font color="#2040a0">WSCTL_TCP_QUERY_INFORMATION</font>,
                                   <font color="4444FF">&amp;</font><font color="#2040a0">tcpRequestQueryInfoEx</font>,
                                   <font color="4444FF">&amp;</font><font color="#2040a0">tcpRequestBufSize</font>,
                                   <font color="#2040a0">ipRouteEntry</font>, <font color="4444FF">&amp;</font><font color="#2040a0">ipRouteEntryBufSize</font><font color="4444FF">)</font><font color="4444FF">;</font>

                <strong>if</strong> <font color="4444FF">(</font><font color="#2040a0">result</font><font color="4444FF">)</font> <font color="4444FF"><strong>{</strong></font>
                    <font color="#2040a0">fprintf</font><font color="4444FF">(</font><font color="#2040a0">stderr</font>, <font color="#008000">&quot;%s(%d) WsControl failed (%ld)<font color="#77dd77">\n</font>&quot;</font>,
                            <font color="#2040a0">__FILE__</font>, <font color="#2040a0">__LINE__</font>, <font color="#2040a0">WSAGetLastError1</font><font color="4444FF">(</font><font color="4444FF">)</font><font color="4444FF">)</font><font color="4444FF">;</font>
                    <font color="#2040a0">WSACleanup1</font><font color="4444FF">(</font><font color="4444FF">)</font><font color="4444FF">;</font>
                    <font color="#2040a0">FreeLibrary</font><font color="4444FF">(</font><font color="#2040a0">hModule</font><font color="4444FF">)</font><font color="4444FF">;</font>
                    <strong>return</strong> <font color="#2040a0">EXIT_FAILURE</font><font color="4444FF">;</font>
                <font color="4444FF"><strong>}</strong></font>

                <font color="#444444">//print route table</font>
                <strong>for</strong> <font color="4444FF">(</font><font color="#2040a0">j</font> <font color="4444FF">=</font> <font color="#FF0000">0</font><font color="4444FF">;</font> <font color="#2040a0">j</font> <font color="4444FF">&lt;</font> <font color="#2040a0">ipSnmpInfo</font>.<font color="#2040a0">ipsi_numroutes</font><font color="4444FF">;</font> <font color="#2040a0">j</font><font color="4444FF">+</font><font color="4444FF">+</font><font color="4444FF">)</font> <font color="4444FF"><strong>{</strong></font>

                    <strong>unsigned</strong> <strong>char</strong> <font color="4444FF">*</font><font color="#2040a0">addr</font> <font color="4444FF">=</font> <font color="4444FF">(</font><strong>unsigned</strong> <strong>char</strong>
                                           <font color="4444FF">*</font><font color="4444FF">)</font> <font color="4444FF">&amp;</font><font color="#2040a0">ipRouteEntry</font><font color="4444FF">[</font><font color="#2040a0">j</font><font color="4444FF">]</font>.<font color="#2040a0">ire_addr</font><font color="4444FF">;</font>
                    <strong>unsigned</strong> <strong>char</strong> <font color="4444FF">*</font><font color="#2040a0">gw</font> <font color="4444FF">=</font> <font color="4444FF">(</font><strong>unsigned</strong> <strong>char</strong>
                                         <font color="4444FF">*</font><font color="4444FF">)</font> <font color="4444FF">&amp;</font><font color="#2040a0">ipRouteEntry</font><font color="4444FF">[</font><font color="#2040a0">j</font><font color="4444FF">]</font>.<font color="#2040a0">ire_gw</font><font color="4444FF">;</font>
                    <strong>unsigned</strong> <strong>char</strong> <font color="4444FF">*</font><font color="#2040a0">mask</font> <font color="4444FF">=</font> <font color="4444FF">(</font><strong>unsigned</strong> <strong>char</strong>
                                           <font color="4444FF">*</font><font color="4444FF">)</font> <font color="4444FF">&amp;</font><font color="#2040a0">ipRouteEntry</font><font color="4444FF">[</font><font color="#2040a0">j</font><font color="4444FF">]</font>.<font color="#2040a0">ire_mask</font><font color="4444FF">;</font>

                    <font color="#2040a0">fprintf</font><font color="4444FF">(</font><font color="#2040a0">stdout</font>,
                            <font color="#008000">&quot;Route %ld.%ld.%ld.%ld  &quot;</font>
                            <font color="#008000">&quot;IF %ld  &quot;</font>
                            <font color="#008000">&quot;GW %ld.%ld.%ld.%ld  &quot;</font>
                            <font color="#008000">&quot;Mask %ld.%ld.%ld.%ld  &quot;</font>
                            <font color="#008000">&quot;Metric %ld<font color="#77dd77">\n</font>&quot;</font>,
                            <font color="#2040a0">addr</font><font color="4444FF">[</font><font color="#FF0000">0</font><font color="4444FF">]</font>, <font color="#2040a0">addr</font><font color="4444FF">[</font><font color="#FF0000">1</font><font color="4444FF">]</font>, <font color="#2040a0">addr</font><font color="4444FF">[</font><font color="#FF0000">2</font><font color="4444FF">]</font>, <font color="#2040a0">addr</font><font color="4444FF">[</font><font color="#FF0000">3</font><font color="4444FF">]</font>,
                            <font color="#2040a0">ipRouteEntry</font><font color="4444FF">[</font><font color="#2040a0">j</font><font color="4444FF">]</font>.<font color="#2040a0">ire_index</font>,
                            <font color="#2040a0">gw</font><font color="4444FF">[</font><font color="#FF0000">0</font><font color="4444FF">]</font>, <font color="#2040a0">gw</font><font color="4444FF">[</font><font color="#FF0000">1</font><font color="4444FF">]</font>, <font color="#2040a0">gw</font><font color="4444FF">[</font><font color="#FF0000">2</font><font color="4444FF">]</font>, <font color="#2040a0">gw</font><font color="4444FF">[</font><font color="#FF0000">3</font><font color="4444FF">]</font>,
                            <font color="#2040a0">mask</font><font color="4444FF">[</font><font color="#FF0000">0</font><font color="4444FF">]</font>, <font color="#2040a0">mask</font><font color="4444FF">[</font><font color="#FF0000">1</font><font color="4444FF">]</font>, <font color="#2040a0">mask</font><font color="4444FF">[</font><font color="#FF0000">2</font><font color="4444FF">]</font>, <font color="#2040a0">mask</font><font color="4444FF">[</font><font color="#FF0000">3</font><font color="4444FF">]</font>,
                            <font color="#2040a0">ipRouteEntry</font><font color="4444FF">[</font><font color="#2040a0">j</font><font color="4444FF">]</font>.<font color="#2040a0">ire_metric</font><font color="4444FF">)</font><font color="4444FF">;</font>
                <font color="4444FF"><strong>}</strong></font>
            <font color="4444FF"><strong>}</strong></font>
        <font color="4444FF"><strong>}</strong></font>
    <font color="4444FF"><strong>}</strong></font>

    <font color="#2040a0">WSACleanup1</font><font color="4444FF">(</font><font color="4444FF">)</font><font color="4444FF">;</font>
    <font color="#2040a0">FreeLibrary</font><font color="4444FF">(</font><font color="#2040a0">hModule</font><font color="4444FF">)</font><font color="4444FF">;</font>
    <strong>return</strong> <font color="#2040a0">EXIT_SUCCESS</font><font color="4444FF">;</font>
<font color="4444FF"><strong>}</strong></font>

<font color="#444444">//end of code</font>
</pre>

<hr noshade size=1 color=#404040>

<p>[Ed. Tom included a bunch of notes from tracing calls
winipcfg.exe made. For various reasons, I've made them available <a
href="wscontrol-notes.txt">in a separate file</a>.]</p>

<p><font size=-1>Copyright &copy; 1999 by Tom Sanfilippo. All rights
reserved.</font></p>

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