don't return the ip address when the mask is not found

Currently totemip_copy (boundto,&ipaddr) is called even when the
required mask is not found.

This patch changes the behavior to only copy the ipaddr when the
mask is found.

The current behavior makes debugging an incorrect config really
confusing.


git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@2409 fd59a12c-fef9-0310-b244-a6a79926bd2f

exec/totemip.c

@@ -474,6 +474,7 @@ int totemip_iface_check(struct totem_ip_address *bindnet,
 			int mask_high_bit)
 {
 	int fd;
+	int res = -1;
 	struct {
                 struct nlmsghdr nlh;
                 struct rtgenmsg g;
@@ -591,17 +592,33 @@ int totemip_iface_check(struct totem_ip_address *bindnet,
 					/* SIOCGIFFLAGS needs an interface name */
 					status = ioctl(ioctl_fd, SIOCGIFNAME, &ifr);
 					status = ioctl(ioctl_fd, SIOCGIFFLAGS, &ifr);
+					close(ioctl_fd);
 					if (status) {
-						close(ioctl_fd);
-						close(fd);
-						return -1;
+						res = -1;
+						goto finished;
 					}
 
 					if (ifr.ifr_flags & IFF_UP)
 						*interface_up = 1;
 
 					*interface_num = ifa->ifa_index;
-					close(ioctl_fd);
+					/*
+					 * Mask 32nd bit off to workaround bugs in other peoples code
+					 * (if configuration requests it).
+					 */
+					if (ipaddr.family == AF_INET && ipaddr.nodeid == 0) {
+						unsigned int nodeid = 0;
+						memcpy (&nodeid, ipaddr.addr, sizeof (int));
+#if __BYTE_ORDER == __BIG_ENDIAN
+                                                nodeid = swab32 (nodeid);
+#endif
+						if (mask_high_bit) {
+							nodeid &= 0x7FFFFFFF;
+						}
+						ipaddr.nodeid = nodeid;
+					}
+					totemip_copy (boundto, &ipaddr);
+					res = 0;
 					goto finished;
 				}
 			}
@@ -609,24 +626,9 @@ int totemip_iface_check(struct totem_ip_address *bindnet,
 			h = NLMSG_NEXT(h, status);
 		}
 	}
+	res = -1; /* address not found */
 finished:
-	/*
-	 * Mask 32nd bit off to workaround bugs in other poeples code
-	 * if configuration requests it.
-	 */
-	if (ipaddr.family == AF_INET && ipaddr.nodeid == 0) {
-                unsigned int nodeid = 0;
-                memcpy (&nodeid, ipaddr.addr, sizeof (int));
-#if __BYTE_ORDER == __BIG_ENDIAN
-		nodeid = swab32 (nodeid);
-#endif
-		if (mask_high_bit) {
-                        nodeid &= 0x7FFFFFFF;
-		}
-                ipaddr.nodeid = nodeid;
-        }
-	totemip_copy (boundto, &ipaddr);
 	close(fd);
-	return 0;
+	return res;
 }
 #endif /* COROSYNC_LINUX */