wg-quick: support v6 dual stack
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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				@ -79,8 +79,10 @@ add_if() {
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del_if() {
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	if [[ $(ip route show table all) =~ .*\ dev\ $INTERFACE\ table\ ([0-9]+)\ .* ]]; then
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		while [[ -n $(ip rule show table ${BASH_REMATCH[1]}) ]]; do
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			cmd ip rule delete table "${BASH_REMATCH[1]}"
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			[[ $(ip rule show table main) == *"from all lookup main suppress_prefixlength 0"* ]] && cmd ip rule delete table main suppress_prefixlength 0
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		done
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	fi
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	cmd ip link delete dev "$INTERFACE"
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}
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@ -101,13 +103,22 @@ add_route() {
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	fi
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}
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DEFAULT_TABLE=
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PREVIOUS_ENDPOINT=
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add_default() {
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	[[ $(join <(wg show "$INTERFACE" allowed-ips) <(wg show "$INTERFACE" endpoints)) =~ .*\ ${1//./\\.}\ \[?([0-9.:a-f]+)\]?:[0-9]+$ ]] && local endpoint="${BASH_REMATCH[1]}"
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	[[ $(join <(wg show "$INTERFACE" allowed-ips) <(wg show "$INTERFACE" endpoints)) =~ ([A-Za-z0-9/+=]{44})\ ([0-9a-f/.:]+ )*${1//./\\.}\ ([0-9a-f/.:]+ )*\[?([0-9.:a-f]+)\]?:[0-9]+ ]] && local endpoint="${BASH_REMATCH[4]}"
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	[[ -n $endpoint ]] || return 0
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	local table=51820
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	while [[ -n $(ip route show table $table) ]]; do ((table++)); done
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	cmd ip route add "$1" dev "$INTERFACE" table $table
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	cmd ip rule add not to "$endpoint" table $table
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	local first=0
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	if [[ -z $DEFAULT_TABLE ]]; then
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		first=1
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		DEFAULT_TABLE=51820
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		while [[ -n $(ip route show table $DEFAULT_TABLE) ]]; do ((DEFAULT_TABLE++)); done
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	fi
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	cmd ip route add "$1" dev "$INTERFACE" table $DEFAULT_TABLE
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	[[ $PREVIOUS_ENDPOINT == "$endpoint" ]] && return 0
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	PREVIOUS_ENDPOINT="$endpoint"
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	cmd ip rule add not to "$endpoint" table $DEFAULT_TABLE
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	[[ $first -eq 1 ]] || return 0
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	cmd ip rule add table main suppress_prefixlength 0
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}
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