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linux-next/net/hsr/hsr_forward.h
George McCollister 48b491a5cc net: hsr: fix mac_len checks
Commit 2e9f60932a ("net: hsr: check skb can contain struct hsr_ethhdr
in fill_frame_info") added the following which resulted in -EINVAL
always being returned:
	if (skb->mac_len < sizeof(struct hsr_ethhdr))
		return -EINVAL;

mac_len was not being set correctly so this check completely broke
HSR/PRP since it was always 14, not 20.

Set mac_len correctly and modify the mac_len checks to test in the
correct places since sometimes it is legitimately 14.

Fixes: 2e9f60932a ("net: hsr: check skb can contain struct hsr_ethhdr in fill_frame_info")
Signed-off-by: George McCollister <george.mccollister@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-05-24 14:10:28 -07:00

32 lines
1.1 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright 2011-2014 Autronica Fire and Security AS
*
* Author(s):
* 2011-2014 Arvid Brodin, arvid.brodin@alten.se
*
* include file for HSR and PRP.
*/
#ifndef __HSR_FORWARD_H
#define __HSR_FORWARD_H
#include <linux/netdevice.h>
#include "hsr_main.h"
void hsr_forward_skb(struct sk_buff *skb, struct hsr_port *port);
struct sk_buff *prp_create_tagged_frame(struct hsr_frame_info *frame,
struct hsr_port *port);
struct sk_buff *hsr_create_tagged_frame(struct hsr_frame_info *frame,
struct hsr_port *port);
struct sk_buff *hsr_get_untagged_frame(struct hsr_frame_info *frame,
struct hsr_port *port);
struct sk_buff *prp_get_untagged_frame(struct hsr_frame_info *frame,
struct hsr_port *port);
bool prp_drop_frame(struct hsr_frame_info *frame, struct hsr_port *port);
bool hsr_drop_frame(struct hsr_frame_info *frame, struct hsr_port *port);
int prp_fill_frame_info(__be16 proto, struct sk_buff *skb,
struct hsr_frame_info *frame);
int hsr_fill_frame_info(__be16 proto, struct sk_buff *skb,
struct hsr_frame_info *frame);
#endif /* __HSR_FORWARD_H */