X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fnetifd.git;a=blobdiff_plain;f=interface-ip.c;h=54f56d69b291d2eb207dd596cd19039c300a7286;hp=4a2ee354f46978be77b81f7c398a0431b1c3ec28;hb=a0f133ed22dee4eccc05961f646e14ecc0514060;hpb=014698606902e495c7b169bf30688a685cd72d64

diff --git a/interface-ip.c b/interface-ip.c
index 4a2ee35..54f56d6 100644
--- a/interface-ip.c
+++ b/interface-ip.c
@@ -473,11 +473,17 @@ interface_update_proto_addr(struct vlist_tree *tree,
 		if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
 		    !a_new->broadcast) {
 
-			uint32_t mask = ~0;
-			uint32_t *a = (uint32_t *) &a_new->addr;
-
-			mask >>= a_new->mask;
-			a_new->broadcast = *a | htonl(mask);
+			/* /31 and /32 addressing need 255.255.255.255
+			 * as broadcast address. */
+			if (a_new->mask >= 31) {
+				a_new->broadcast = (uint32_t) ~0;
+			} else {
+				uint32_t mask = ~0;
+				uint32_t *a = (uint32_t *) &a_new->addr;
+
+				mask >>= a_new->mask;
+				a_new->broadcast = *a | htonl(mask);
+			}
 		}
 	}