static u8 *ndisc_fill_addr_option(u8 *opt, int type, void *data, int data_len, unsigned short addr_type) { int space = NDISC_OPT_SPACE(data_len); int pad = ndisc_addr_option_pad(addr_type); opt[0] = type; opt[1] = space>>3; memset(opt + 2, 0, pad); opt += pad; space -= pad; memcpy(opt+2, data, data_len); data_len += 2; opt += data_len; if ((space -= data_len) > 0) memset(opt, 0, space); return opt + space; }
static void ndisc_fill_addr_option(struct sk_buff *skb, int type, void *data) { int pad = ndisc_addr_option_pad(skb->dev->type); int data_len = skb->dev->addr_len; int space = ndisc_opt_addr_space(skb->dev); u8 *opt = skb_put(skb, space); opt[0] = type; opt[1] = space>>3; memset(opt + 2, 0, pad); opt += pad; space -= pad; memcpy(opt+2, data, data_len); data_len += 2; opt += data_len; if ((space -= data_len) > 0) memset(opt, 0, space); }
static inline int ndisc_opt_addr_space(struct net_device *dev) { return NDISC_OPT_SPACE(dev->addr_len + ndisc_addr_option_pad(dev->type)); }