[lwip-devel] [patch #7696] contrib: Allow apps/tcpecho_raw be used with IPv6

[Simon Goldschmidt]

Follow-up Comment #1, patch #7696 (project lwip):

> I am not sure if it is correct to just sed ->isipv6 on a pcb, 

It's certainly not! Accessing members of structs is never the correct way,
it's a pity C doesn't allow us to hide them.

> but I found no API for it.

You'll have to decide for a protocol version when you create the pcb by
calling tcp_new_ip6() instead of tcp_new(). However, the API in deciding
between v4 and v6 isn't really satisfying, yet. The creation and the address
handling (ipX_addr_t) doesn't work neatly everywhere.

Also, wouldn't tcp_listen_dual() be a better solution here to listen on both
protocols?

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