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core: accept an off-subnet gateway for /31 and /32 #70

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Merged
MickLesk merged 1 commit into from
Sep 24, 2026
Merged

core: accept an off-subnet gateway for /31 and /32 #70

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3 changes: 3 additions & 0 deletions ui/validate.func
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Original file line number Diff line number Diff line change
Expand Up @@ -402,6 +402,9 @@ validate_gateway_in_subnet() {
local ip="${static_ip%%/*}"
local cidr="${static_ip##*/}"

# /31 and /32 have no usable subnet, so an off-subnet gateway is normal there.
((cidr >= 31)) && return 0

# Convert CIDR to netmask bits
local mask=$((0xFFFFFFFF << (32 - cidr) & 0xFFFFFFFF))

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