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IPv6 Network Solicitation packet shows as Malformed and restart some routers #9791

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praveenCY opened this issue Sep 17, 2021 · 1 comment
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IPv6 Network Solicitation packet shows as Malformed and restart some routers #9791

praveenCY opened this issue Sep 17, 2021 · 1 comment

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@praveenCY
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Problem

IPv6 Network Solicitation packet shows as Malformed during Wi-Fi connection state. This causes some routers like Netgear C6220 (AC1200) to reboot during Wi-Fi Connect sequence.

image

Reason

{LwIP: nd6_send_ns} Packet buffer allocated for Network solicitation packet by pbuf_alloc includes ND6_LLADDR_OPTION_SIZE even if lladdr_opt_len is zero.

Proposed Solution

Allocate Packet buffer based on lladdr_opt_len properly to avoid this malformed packet formation for NS.

I will post PR for this next week
@billwatersiii billwatersiii mentioned this issue Oct 1, 2021
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@praveenCY
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#10160 Merged

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@praveenCY