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wg-quick: linux: prevent traffic from momentarily leaking into tunnel 

The wireguard route table ip rule should stay as a no-op until the
`suppress_prefixlength 0 table main` rule is in effect. Therefore, add
the wireguard default route to its route table after the latter rule is
added.

Signed-off-by: Tom Yan <tom.ty89@gmail.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Tom Yan 2022-06-17 19:34:19 +08:00 committed by Jason A. Donenfeld
parent 5b9c1d6d74
commit 71799a8f6d
1 changed files with 1 additions and 1 deletions
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src/wg-quick/linux.bash
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@ -220,9 +220,9 @@ add_default() {
fi fi
local proto=-4 iptables=iptables pf=ip local proto=-4 iptables=iptables pf=ip
[[ $1 == *:* ]] && proto=-6 iptables=ip6tables pf=ip6 [[ $1 == *:* ]] && proto=-6 iptables=ip6tables pf=ip6
cmd ip $proto route add "$1" dev "$INTERFACE" table $table
cmd ip $proto rule add not fwmark $table table $table cmd ip $proto rule add not fwmark $table table $table
cmd ip $proto rule add table main suppress_prefixlength 0 cmd ip $proto rule add table main suppress_prefixlength 0
cmd ip $proto route add "$1" dev "$INTERFACE" table $table
local marker="-m comment --comment \"wg-quick(8) rule for $INTERFACE\"" restore=$'*raw\n' nftable="wg-quick-$INTERFACE" nftcmd local marker="-m comment --comment \"wg-quick(8) rule for $INTERFACE\"" restore=$'*raw\n' nftable="wg-quick-$INTERFACE" nftcmd
printf -v nftcmd '%sadd table %s %s\n' "$nftcmd" "$pf" "$nftable" printf -v nftcmd '%sadd table %s %s\n' "$nftcmd" "$pf" "$nftable"