sd-ipv4ll/networkd: generate predictable addresses

[thirdparty/systemd.git] / src / network / networkd-link.c

diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 14cc8715ce844224ae2cd30b3c865504e5a4bdcf..4044f0b5a52e65dfd6e0febd4957b809c80dd797 100644 (file)
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -63,6 +63,8 @@ int link_new(Manager *manager, struct udev_device *device, Link **ret) {
         if (r < 0)
                 return r;
 
+        link->udev_device = udev_device_ref(device);
+
         *ret = link;
         link = NULL;
 
@@ -85,6 +87,8 @@ void link_free(Link *link) {
         free(link->ifname);
         free(link->state_file);
 
+        udev_device_unref(link->udev_device);
+
         free(link);
 }
 
@@ -1283,10 +1287,18 @@ int link_add(Manager *m, struct udev_device *device, Link **ret) {
                 return r;
 
         if (link->network->ipv4ll) {
+                uint8_t seed[8];
                 r = sd_ipv4ll_new(&link->ipv4ll);
                 if (r < 0)
                         return r;
 
+                r = net_get_unique_predictable_data(link->udev_device, seed);
+                if (r >= 0) {
+                        r = sd_ipv4ll_set_address_seed(link->ipv4ll, seed);
+                        if (r < 0)
+                                return r;
+                }
+
                 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
                 if (r < 0)
                         return r;