From: Patrik Flykt <patrik.flykt@linux.intel.com>
Date: Fri, 24 Aug 2018 15:49:14 +0000 (-0600)
Subject: networkd-dhcp6: Log warning with PD prefixes shorter than 48
X-Git-Tag: v240~792^2~3
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=3ec8303fdc4d1fab87cdd83370c00b25b76374bc;p=thirdparty%2Fsystemd.git

networkd-dhcp6: Log warning with PD prefixes shorter than 48

Log a warning message in case the network prefix delegated is shorter
than /48.
---

diff --git a/src/network/networkd-dhcp6.c b/src/network/networkd-dhcp6.c
index fa6e18cd2c4..a64545b937b 100644
--- a/src/network/networkd-dhcp6.c
+++ b/src/network/networkd-dhcp6.c
@@ -236,6 +236,11 @@ static int dhcp6_lease_pd_prefix_acquired(sd_dhcp6_client *client, Link *link) {
                         continue;
                 }
 
+                if (pd_prefix_len < 48) {
+                        log_link_warning(link, "PD Prefix length < 48, looks unusual %s/%u",
+                                       strnull(buf), pd_prefix_len);
+                }
+
                 r = dhcp6_pd_prefix_distribute(link, &i, &pd_prefix,
                                                pd_prefix_len,
                                                lifetime_preferred,