Hi Rich,
Basic (v4 only) version of these (as well automatic wan proto detection) was
implemented and rejected some years ago :)
Both are quite easy to do, that version used the following hotplug script:
===
#!/bin/sh
if [ "$INTERFACE" = "wan" ] && [ "$ACTION" = "ifup" ]
then
# Get subnets for lan and wan
lan_subnet=$(uci get network.lan.ipaddr | cut -d '.' -f3)
wan_subnet=$(ifconfig wan | grep -w "inet" | awk '{print $2}' | cut -d
':' -f2 | cut -d '.' -f3)
# If subnet is the same, randomize lan IP
if [[ $lan_subnet == $wan_subnet ]]; then
rn=$(awk 'function rn(n) { return int(rand()*n); } BEGIN {{
srand(); }{ printf("%d.%d", rn(254), rn (254 ))}}')
uci set network.lan.ipaddr=10.$rn.1
uci commit network
# Restart network to refresh changes
/etc/init.d/network restart
fi
fi
===
Setup of redirection ran as an init script:
===
#!/bin/sh
START=55
boot() {
lanip=$(uci get network.lan.ipaddr)
grep -q "myrouter.local/$lanip" /etc/config/dhcp
if [ $? -eq 1 ] ; then
# add a redirect myrouter.local to our IP
uci add_list dhcp.@dnsmasq[0].address="/myrouter.local/$lanip"
uci commit dhcp
fi
}
===
Best,
Imre
________________________________________
From: openwrt-adm <[email protected]> on behalf of Rich
Brown <[email protected]>
Sent: Monday, February 21, 2022 22:38
To: OpenWrt Project Administration; [email protected]
Cc: Richard E. Brown
Subject: Automatic LAN Subnet Reassignment
There is a new RFC on the OpenWrt forum proposing "Automatic LAN Subnet
Reassignment"
https://forum.openwrt.org/t/rfc-automatic-lan-subnet-reassignment-upon-conflict-with-wan/120938
The RFC responds to the advice given at last week's OpenWrt-Adm meeting
(https://etherpad.wikimedia.org/p/ZlZiTcud3wufcSX9-1jD)
The intent of the proposal is for the default configuration to assign a LAN
subnet that avoids a conflict with the WAN subnet, and provide a mDNS name such
at OpenWrt.lan for connections.
I have two requests:
1) Please make comments on the technical merits of the proposal on the OpenWrt
forum at the link above.
2) If the proposal seems to make sense, please consider the process by which we
would incorporate this into the main release (likely, not for 22.0x, but
perhaps the next release?)
Thank you.
Rich
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