wg-quick: anchor sysctl regex to start and end

This doesn't actually fix a real problem, but it is more correct than
not having it.

Suggested-by: Aaron Sigel <aaron@vtty.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

diff --git a/src/wg-quick.bash b/src/wg-quick.bash
index e5ae48f27edc874a9164e0540649784db2ca33c5..c70c0789ff47bc9967b6fc6406d6540c39ac25de 100755 (executable)
--- a/src/wg-quick.bash
+++ b/src/wg-quick.bash
@@ -163,7 +163,7 @@ add_default() {
        local key value
        while read -r key _ value; do
                [[ $value -eq 1 ]] && sysctl -q "$key=2"
-       done < <(sysctl -a -r 'net\.ipv4.conf\..+\.rp_filter')
+       done < <(sysctl -a -r '^net\.ipv4.conf\.[^ .=]+\.rp_filter$')
        return 0
 }