add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/net/batman-adv/routing.c
..
..
@@ -1,19 +1,7 @@
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 // SPDX-License-Identifier: GPL-2.0
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-/* Copyright (C) 2007-2018  B.A.T.M.A.N. contributors:
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+/* Copyright (C) 2007-2020  B.A.T.M.A.N. contributors:
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  *
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  * Marek Lindner, Simon Wunderlich
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of version 2 of the GNU General Public
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- * License as published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful, but
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- * WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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- * General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, see <http://www.gnu.org/licenses/>.
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  */
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 #include "routing.h"
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@@ -83,13 +71,13 @@
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 	 * the code needs to ensure the curr_router variable contains a pointer
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 	 * to the replaced best neighbor.
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 	 */
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-	curr_router = rcu_dereference_protected(orig_ifinfo->router, true);
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 	/* increase refcount of new best neighbor */
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 	if (neigh_node)
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 		kref_get(&neigh_node->refcount);
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-	rcu_assign_pointer(orig_ifinfo->router, neigh_node);
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+	curr_router = rcu_replace_pointer(orig_ifinfo->router, neigh_node,
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+					  true);
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 	spin_unlock_bh(&orig_node->neigh_list_lock);
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 	batadv_orig_ifinfo_put(orig_ifinfo);
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..
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@@ -461,7 +449,7 @@
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  * @skb: packet to check
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  * @hdr_size: size of header to pull
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  *
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- * Check for short header and bad addresses in given packet.
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+ * Checks for short header and bad addresses in the given packet.
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  *
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  * Return: negative value when check fails and 0 otherwise. The negative value
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  * depends on the reason: -ENODATA for bad header, -EBADR for broadcast
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@@ -1047,6 +1035,8 @@
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 							hdr_size))
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 			goto rx_success;
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+		batadv_dat_snoop_incoming_dhcp_ack(bat_priv, skb, hdr_size);
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+
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 		batadv_interface_rx(recv_if->soft_iface, skb, hdr_size,
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 				    orig_node);
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..
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@@ -1127,7 +1117,7 @@
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  * @recv_if: interface that the skb is received on
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  *
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  * This function does one of the three following things: 1) Forward fragment, if
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- * the assembled packet will exceed our MTU; 2) Buffer fragment, if we till
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+ * the assembled packet will exceed our MTU; 2) Buffer fragment, if we still
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  * lack further fragments; 3) Merge fragments, if we have all needed parts.
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  *
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  * Return: NET_RX_DROP if the skb is not consumed, NET_RX_SUCCESS otherwise.
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@@ -1282,6 +1272,8 @@
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 	if (batadv_dat_snoop_incoming_arp_reply(bat_priv, skb, hdr_size))
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 		goto rx_success;
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+	batadv_dat_snoop_incoming_dhcp_ack(bat_priv, skb, hdr_size);
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+
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 	/* broadcast for me */
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 	batadv_interface_rx(recv_if->soft_iface, skb, hdr_size, orig_node);
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