fix: 6lowpan could panic when frag datagram_size < 40 #997
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6LoWPAN fragmentation could panic when the datagram_size in the fragmentation header is less than 40. When converting 6LoWPAN to IPv6 a minimum size of 40 bytes is required to put the IPv6 header in the buffer.
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6LoWPAN fragmentation could panic when the datagram_size in the fragmentation header is less than 40. When converting 6LoWPAN to IPv6 a minimum size of 40 bytes is required to put the IPv6 header in the buffer.