n>ip4_addr_netmask_valid()</h2>

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          <td class="memname">u8_t ip4_addr_netmask_valid </td>
          <td>(</td>
          <td class="paramtype">u32_t&#160;</td>
          <td class="paramname"><em>netmask</em></td><td>)</td>
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<p>Checks if a netmask is valid (starting with ones, then only zeros)</p>
<dl class="params"><dt>Parameters</dt><dd>
