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          <td class="memname">#define LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN&#160;&#160;&#160;1</td>
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<p>Small optimization: set to 0 if incoming PBUF_POOL pbuf always can be used to modify and send a response packet (and to 1 if this is not the case, e.g. when link header is stripped off when receiving) </p>

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<h2 class="groupheader">Function Documentation</h2>
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