#define ND_MAX_GROUP 30
#define ND_IFINDEX_LEN sizeof(int)
#define ND_NLMSG_SPACE(len) (NLMSG_SPACE(len) + ND_IFINDEX_LEN)
-#define ND_NLMSG_DATA(nlh) ((void *)((char *)NLMSG_DATA(nlh) + ND_IFINDEX_LEN))
+#define ND_NLMSG_DATA(nlh) ((void *)((char *)NLMSG_DATA(nlh) + \
+ ND_IFINDEX_LEN))
#define ND_NLMSG_S_LEN(len) (len+ND_IFINDEX_LEN)
#define ND_NLMSG_R_LEN(nlh) (nlh->nlmsg_len-ND_IFINDEX_LEN)
#define ND_NLMSG_IFIDX(nlh) NLMSG_DATA(nlh)