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rp2/lwip_inc: Enable IPv6 per default on rp2 port.

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Having IPv6 support is important, especially for IoT-Devices which might be
many, requiring individual IP-addresses. In particular direct access via
link-local addresses and having deterministic SLAAC-addresses can be quite
convenient. Also in IPv6-only networks or for connecting to IPv6-only
services, this is very useful.

For the Pico W, there is enough flash and RAM that enabling IPv6 by default
is the right choice.

Should IPv6 support in a network exist (i.e. there are Router
Advertisements), but not provide connectivity, connecting by domain name
should not be a problem as DNS will default to return the IPv4-address (if
that exists), unless reconfigured at runtime to prefer IPv6.

In any case a user can disable obtaining SLAAC-addresses with:

    <nic>.ipconfig(autoconf6=False)

Signed-off-by: Felix Dörre <felix@dogcraft.de>
This commit is contained in:
Felix Dörre 2022-08-25 17:26:37 +00:00 committed by Damien George
parent ba98533454
commit 7fe8f030ee
1 changed files with 4 additions and 1 deletions
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5
ports/rp2/lwip_inc/lwipopts.h
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@ -26,7 +26,10 @@
#define LWIP_NETIF_EXT_STATUS_CALLBACK 1
#define LWIP_NETIF_STATUS_CALLBACK 1
#define LWIP_IPV6 0
#define LWIP_IPV4 1
#define LWIP_IPV6 1
#define LWIP_ND6_NUM_DESTINATIONS 4
#define LWIP_ND6_QUEUEING 0
#define LWIP_DHCP 1
#define LWIP_DHCP_CHECK_LINK_UP 1
#define DHCP_DOES_ARP_CHECK 0 // to speed DHCP up