1 // SPDX-License-Identifier: GPL-2.0-or-later
32 	list_for_each_entry(p, &br->port_list, list) {  in br_recalculate_neigh_suppress_enabled()
33 		if (p->flags & (BR_NEIGH_SUPPRESS | BR_NEIGH_VLAN_SUPPRESS)) {  in br_recalculate_neigh_suppress_enabled()
55 		   dev->name, &dest_ip, dest_hw, &src_ip, src_hw);  in br_arp_send()
84 		skb->ip_summed = CHECKSUM_UNNECESSARY;  in br_arp_send()
85 		skb->pkt_type = PACKET_HOST;  in br_arp_send()
94 	__be32 ip = *(__be32 *)priv->data;  in br_chk_addr_ip()
104 		return 1;  in br_chk_addr_ip()
128 	struct net_device *dev = br->dev;  in br_do_proxy_suppress_arp()
132 	u8 *arpptr, *sha;  in br_do_proxy_suppress_arp()  local
135 	BR_INPUT_SKB_CB(skb)->proxyarp_replied = 0;  in br_do_proxy_suppress_arp()
137 	if ((dev->flags & IFF_NOARP) ||  in br_do_proxy_suppress_arp()
143 	if (parp->ar_pro != htons(ETH_P_IP) ||  in br_do_proxy_suppress_arp()
144 	    parp->ar_hln != dev->addr_len ||  in br_do_proxy_suppress_arp()
145 	    parp->ar_pln != 4)  in br_do_proxy_suppress_arp()
149 	sha = arpptr;  in br_do_proxy_suppress_arp()
150 	arpptr += dev->addr_len;	/* sha */  in br_do_proxy_suppress_arp()
153 	arpptr += dev->addr_len;	/* tha */  in br_do_proxy_suppress_arp()
163 		if (parp->ar_op != htons(ARPOP_RREQUEST) &&  in br_do_proxy_suppress_arp()
164 		    parp->ar_op != htons(ARPOP_RREPLY) &&  in br_do_proxy_suppress_arp()
167 			BR_INPUT_SKB_CB(skb)->proxyarp_replied = 1;  in br_do_proxy_suppress_arp()
172 	if (parp->ar_op != htons(ARPOP_REQUEST))  in br_do_proxy_suppress_arp()
176 		vlandev = __vlan_find_dev_deep_rcu(br->dev, skb->vlan_proto,  in br_do_proxy_suppress_arp()
187 		BR_INPUT_SKB_CB(skb)->proxyarp_replied = 1;  in br_do_proxy_suppress_arp()
195 		if (!(READ_ONCE(n->nud_state) & NUD_VALID)) {  in br_do_proxy_suppress_arp()
200 		f = br_fdb_find_rcu(br, n->ha, vid);  in br_do_proxy_suppress_arp()
204 			if ((p && (p->flags & BR_PROXYARP)) ||  in br_do_proxy_suppress_arp()
205 			    (f->dst && (f->dst->flags & BR_PROXYARP_WIFI)) ||  in br_do_proxy_suppress_arp()
206 			    br_is_neigh_suppress_enabled(f->dst, vid)) {  in br_do_proxy_suppress_arp()
208 					br_arp_send(br, p, skb->dev, sip, tip,  in br_do_proxy_suppress_arp()
209 						    sha, n->ha, sha, 0, 0);  in br_do_proxy_suppress_arp()
211 					br_arp_send(br, p, skb->dev, sip, tip,  in br_do_proxy_suppress_arp()
212 						    sha, n->ha, sha,  in br_do_proxy_suppress_arp()
213 						    skb->vlan_proto,  in br_do_proxy_suppress_arp()
223 				BR_INPUT_SKB_CB(skb)->proxyarp_replied = 1;  in br_do_proxy_suppress_arp()
241 	if (m->icmph.icmp6_code != 0 ||  in br_is_nd_neigh_msg()
242 	    (m->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION &&  in br_is_nd_neigh_msg()
243 	     m->icmph.icmp6_type != NDISC_NEIGHBOUR_ADVERTISEMENT))  in br_is_nd_neigh_msg()
253 	struct net_device *dev = request->dev;  in br_nd_send()
268 		sizeof(*na) + na_olen + dev->needed_tailroom;  in br_nd_send()
274 	reply->protocol = htons(ETH_P_IPV6);  in br_nd_send()
275 	reply->dev = dev;  in br_nd_send()
280 	daddr = eth_hdr(request)->h_source;  in br_nd_send()
283 	ns_olen = request->len - (skb_network_offset(request) +  in br_nd_send()
284 				  sizeof(struct ipv6hdr)) - sizeof(*ns);  in br_nd_send()
285 	for (i = 0; i < ns_olen - 1; i += (ns->opt[i + 1] << 3)) {  in br_nd_send()
286 		if (!ns->opt[i + 1]) {  in br_nd_send()
290 		if (ns->opt[i] == ND_OPT_SOURCE_LL_ADDR) {  in br_nd_send()
291 			daddr = ns->opt + i + sizeof(struct nd_opt_hdr);  in br_nd_send()
297 	ether_addr_copy(eth_hdr(reply)->h_dest, daddr);  in br_nd_send()
298 	ether_addr_copy(eth_hdr(reply)->h_source, n->ha);  in br_nd_send()
299 	eth_hdr(reply)->h_proto = htons(ETH_P_IPV6);  in br_nd_send()
300 	reply->protocol = htons(ETH_P_IPV6);  in br_nd_send()
309 	pip6->version = 6;  in br_nd_send()
310 	pip6->priority = ipv6_hdr(request)->priority;  in br_nd_send()
311 	pip6->nexthdr = IPPROTO_ICMPV6;  in br_nd_send()
312 	pip6->hop_limit = 255;  in br_nd_send()
313 	pip6->daddr = ipv6_hdr(request)->saddr;  in br_nd_send()
314 	pip6->saddr = *(struct in6_addr *)n->primary_key;  in br_nd_send()
323 	na->icmph.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;  in br_nd_send()
324 	na->icmph.icmp6_router = (n->flags & NTF_ROUTER) ? 1 : 0;  in br_nd_send()
325 	na->icmph.icmp6_override = 1;  in br_nd_send()
326 	na->icmph.icmp6_solicited = 1;  in br_nd_send()
327 	na->target = ns->target;  in br_nd_send()
328 	ether_addr_copy(&na->opt[2], n->ha);  in br_nd_send()
329 	na->opt[0] = ND_OPT_TARGET_LL_ADDR;  in br_nd_send()
330 	na->opt[1] = na_olen >> 3;  in br_nd_send()
332 	na->icmph.icmp6_cksum = csum_ipv6_magic(&pip6->saddr,  in br_nd_send()
333 						&pip6->daddr,  in br_nd_send()
338 	pip6->payload_len = htons(sizeof(*na) + na_olen);  in br_nd_send()
343 	reply->ip_summed = CHECKSUM_UNNECESSARY;  in br_nd_send()
357 		   dev->name, &pip6->daddr, daddr, &pip6->saddr, n->ha);  in br_nd_send()
364 		reply->ip_summed = CHECKSUM_UNNECESSARY;  in br_nd_send()
365 		reply->pkt_type = PACKET_HOST;  in br_nd_send()
374 	struct in6_addr *addr = (struct in6_addr *)priv->data;  in br_chk_addr_ip6()
377 		return 1;  in br_chk_addr_ip6()
402 	struct net_device *dev = br->dev;  in br_do_suppress_nd()
408 	BR_INPUT_SKB_CB(skb)->proxyarp_replied = 0;  in br_do_suppress_nd()
413 	if (msg->icmph.icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT &&  in br_do_suppress_nd()
414 	    !msg->icmph.icmp6_solicited) {  in br_do_suppress_nd()
416 		BR_INPUT_SKB_CB(skb)->proxyarp_replied = 1;  in br_do_suppress_nd()
420 	if (msg->icmph.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION)  in br_do_suppress_nd()
424 	saddr = &iphdr->saddr;  in br_do_suppress_nd()
425 	daddr = &iphdr->daddr;  in br_do_suppress_nd()
429 		BR_INPUT_SKB_CB(skb)->proxyarp_replied = 1;  in br_do_suppress_nd()
435 		vlandev = __vlan_find_dev_deep_rcu(br->dev, skb->vlan_proto,  in br_do_suppress_nd()
443 	if (br_is_local_ip6(vlandev, &msg->target)) {  in br_do_suppress_nd()
447 		BR_INPUT_SKB_CB(skb)->proxyarp_replied = 1;  in br_do_suppress_nd()
451 	n = neigh_lookup(ipv6_stub->nd_tbl, &msg->target, vlandev);  in br_do_suppress_nd()
455 		if (!(READ_ONCE(n->nud_state) & NUD_VALID)) {  in br_do_suppress_nd()
460 		f = br_fdb_find_rcu(br, n->ha, vid);  in br_do_suppress_nd()
464 			if (br_is_neigh_suppress_enabled(f->dst, vid)) {  in br_do_suppress_nd()
467 						   skb->vlan_proto,  in br_do_suppress_nd()
480 				BR_INPUT_SKB_CB(skb)->proxyarp_replied = 1;  in br_do_suppress_nd()
493 		return !!(p->flags & BR_NEIGH_SUPPRESS);  in br_is_neigh_suppress_enabled()
495 	if (p->flags & BR_NEIGH_VLAN_SUPPRESS) {  in br_is_neigh_suppress_enabled()
502 		return !!(v->priv_flags & BR_VLFLAG_NEIGH_SUPPRESS_ENABLED);  in br_is_neigh_suppress_enabled()
504 		return !!(p->flags & BR_NEIGH_SUPPRESS);  in br_is_neigh_suppress_enabled()