net/batman-adv/distributed-arp-table.c

227  * @hdr_size: size of the possible header before the ARP packet
231 static u8 *batadv_arp_hw_src(struct sk_buff *skb, int hdr_size)
235 	addr = (u8 *)(skb->data + hdr_size);
244  * @hdr_size: size of the possible header before the ARP packet
248 static __be32 batadv_arp_ip_src(struct sk_buff *skb, int hdr_size)
250 	return *(__force __be32 *)(batadv_arp_hw_src(skb, hdr_size) + ETH_ALEN);
256  * @hdr_size: size of the possible header before the ARP packet
260 static u8 *batadv_arp_hw_dst(struct sk_buff *skb, int hdr_size)
262 	return batadv_arp_hw_src(skb, hdr_size) + ETH_ALEN + 4;
268  * @hdr_size: size of the possible header before the ARP packet
272 static __be32 batadv_arp_ip_dst(struct sk_buff *skb, int hdr_size)
274 	u8 *dst = batadv_arp_hw_src(skb, hdr_size) + ETH_ALEN * 2 + 4;
420  * @hdr_size: size of the possible header before the ARP packet
424 			   int hdr_size, char *msg)
434 	ip_src = batadv_arp_ip_src(skb, hdr_size);
435 	ip_dst = batadv_arp_ip_dst(skb, hdr_size);
438 		   batadv_arp_hw_src(skb, hdr_size), &ip_src,
439 		   batadv_arp_hw_dst(skb, hdr_size), &ip_dst);
441 	if (hdr_size < sizeof(struct batadv_unicast_packet))
491 			   int hdr_size, char *msg)
995  * @hdr_size: size of the possible header before the ARP packet in the skb
1000 			       struct sk_buff *skb, int hdr_size)
1009 	if (unlikely(!pskb_may_pull(skb, hdr_size + ETH_HLEN)))
1012 	ethhdr = (struct ethhdr *)(skb->data + hdr_size);
1018 	if (unlikely(!pskb_may_pull(skb, hdr_size + ETH_HLEN +
1022 	arphdr = (struct arphdr *)(skb->data + hdr_size + ETH_HLEN);
1040 	ip_src = batadv_arp_ip_src(skb, hdr_size);
1041 	ip_dst = batadv_arp_ip_dst(skb, hdr_size);
1048 	hw_src = batadv_arp_hw_src(skb, hdr_size);
1054 		hw_dst = batadv_arp_hw_dst(skb, hdr_size);
1068  * @hdr_size: the size of the batman-adv header encapsulating the packet
1074 static unsigned short batadv_dat_get_vid(struct sk_buff *skb, int *hdr_size)
1078 	vid = batadv_get_vid(skb, *hdr_size);
1080 	/* ARP parsing functions jump forward of hdr_size + ETH_HLEN.
1082 	 * hdr_size is updated so that the functions will still skip the
1086 		*hdr_size += VLAN_HLEN;
1146 	int hdr_size = 0;
1152 	vid = batadv_dat_get_vid(skb, &hdr_size);
1154 	type = batadv_arp_get_type(bat_priv, skb, hdr_size);
1161 	batadv_dbg_arp(bat_priv, skb, hdr_size, "Parsing outgoing ARP REQUEST");
1163 	ip_src = batadv_arp_ip_src(skb, hdr_size);
1164 	hw_src = batadv_arp_hw_src(skb, hdr_size);
1165 	ip_dst = batadv_arp_ip_dst(skb, hdr_size);
1208 				   skb->len + ETH_HLEN + hdr_size);
1228  * @hdr_size: size of the encapsulation header
1233 					   struct sk_buff *skb, int hdr_size)
1247 	vid = batadv_dat_get_vid(skb, &hdr_size);
1249 	type = batadv_arp_get_type(bat_priv, skb, hdr_size);
1253 	hw_src = batadv_arp_hw_src(skb, hdr_size);
1254 	ip_src = batadv_arp_ip_src(skb, hdr_size);
1255 	ip_dst = batadv_arp_ip_dst(skb, hdr_size);
1257 	batadv_dbg_arp(bat_priv, skb, hdr_size, "Parsing incoming ARP REQUEST");
1274 	if (hdr_size == sizeof(struct batadv_unicast_4addr_packet))
1303 	int hdr_size = 0;
1309 	vid = batadv_dat_get_vid(skb, &hdr_size);
1311 	type = batadv_arp_get_type(bat_priv, skb, hdr_size);
1315 	batadv_dbg_arp(bat_priv, skb, hdr_size, "Parsing outgoing ARP REPLY");
1317 	hw_src = batadv_arp_hw_src(skb, hdr_size);
1318 	ip_src = batadv_arp_ip_src(skb, hdr_size);
1319 	hw_dst = batadv_arp_hw_dst(skb, hdr_size);
1320 	ip_dst = batadv_arp_ip_dst(skb, hdr_size);
1339  * @hdr_size: size of the encapsulation header
1345 					 struct sk_buff *skb, int hdr_size)
1357 	vid = batadv_dat_get_vid(skb, &hdr_size);
1359 	type = batadv_arp_get_type(bat_priv, skb, hdr_size);
1363 	batadv_dbg_arp(bat_priv, skb, hdr_size, "Parsing incoming ARP REPLY");
1365 	hw_src = batadv_arp_hw_src(skb, hdr_size);
1366 	ip_src = batadv_arp_ip_src(skb, hdr_size);
1367 	hw_dst = batadv_arp_hw_dst(skb, hdr_size);
1368 	ip_dst = batadv_arp_ip_dst(skb, hdr_size);
1738  * @hdr_size: header size, up to the tail of the batman-adv header
1745 					struct sk_buff *skb, int hdr_size)
1757 	if (unlikely(!pskb_may_pull(skb, hdr_size + ETH_HLEN)))
1760 	ethhdr = (struct ethhdr *)(skb->data + hdr_size);
1761 	skb_set_network_header(skb, hdr_size + ETH_HLEN);
1768 	vid = batadv_dat_get_vid(skb, &hdr_size);
1796 	int hdr_size = sizeof(struct batadv_bcast_packet);
1808 	vid = batadv_dat_get_vid(forw_packet->skb, &hdr_size);
1810 	type = batadv_arp_get_type(bat_priv, forw_packet->skb, hdr_size);
1814 	ip_dst = batadv_arp_ip_dst(forw_packet->skb, hdr_size);