network: introduce network_adjust_ipv6_proxy_ndp()

src/network/networkd-ipv6-proxy-ndp.c

@@ -12,6 +12,20 @@
 #include "string-util.h"
 #include "sysctl-util.h"
 
+void network_adjust_ipv6_proxy_ndp(Network *network) {
+        assert(network);
+
+        if (set_isempty(network->ipv6_proxy_ndp_addresses))
+                return;
+
+        if (!socket_ipv6_is_supported()) {
+                log_once(LOG_WARNING,
+                         "%s: IPv6 proxy NDP addresses are set, but IPv6 is not supported by kernel, "
+                         "Ignoring IPv6 proxy NDP addresses.", network->filename);
+                network->ipv6_proxy_ndp_addresses = set_free_free(network->ipv6_proxy_ndp_addresses);
+        }
+}
+
 static int set_ipv6_proxy_ndp_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
         int r;
 

src/network/networkd-ipv6-proxy-ndp.h

@@ -4,6 +4,9 @@
 #include "conf-parser.h"
 
 typedef struct Link Link;
+typedef struct Network Network;
+
+void network_adjust_ipv6_proxy_ndp(Network *network);
 
 int link_set_ipv6_proxy_ndp_addresses(Link *link);
 

src/network/networkd-network.c

@@ -20,6 +20,7 @@
 #include "networkd-dhcp-common.h"
 #include "networkd-dhcp-server-static-lease.h"
 #include "networkd-dhcp-server.h"
+#include "networkd-ipv6-proxy-ndp.h"
 #include "networkd-manager.h"
 #include "networkd-ndisc.h"
 #include "networkd-neighbor.h"
@@ -177,6 +178,7 @@ int network_verify(Network *network) {
         /* IPMasquerade implies IPForward */
         network->ip_forward |= network->ip_masquerade;
 
+        network_adjust_ipv6_proxy_ndp(network);
         network_adjust_ipv6_accept_ra(network);
         network_adjust_dhcp(network);
         network_adjust_radv(network);