451d8123f8
DAN-P (Dual Attached Nodes PRP) nodes are expected to receive traditional IP packets as well as PRP (Parallel Redundancy Protocol) tagged (trailer) packets. PRP trailer is 6 bytes of PRP protocol unit called RCT, Redundancy Control Trailer (RCT) similar to HSR tag. PRP network can have traditional devices such as bridges/switches or PC attached to it and should be able to communicate. Regular Ethernet devices treat the RCT as pads. This patch adds logic to format L2 frames from network stack to add a trailer (RCT) and send it as duplicates over the slave interfaces when the protocol is PRP as per IEC 62439-3. At the ingress, it strips the trailer, do duplicate detection and rejection and forward a stripped frame up the network stack. PRP device should accept frames from Singly Attached Nodes (SAN) and thus the driver mark the link where the frame came from in the node table. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
31 lines
1 KiB
C
31 lines
1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright 2011-2014 Autronica Fire and Security AS
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*
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* Author(s):
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* 2011-2014 Arvid Brodin, arvid.brodin@alten.se
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*
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* include file for HSR and PRP.
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*/
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#ifndef __HSR_FORWARD_H
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#define __HSR_FORWARD_H
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#include <linux/netdevice.h>
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#include "hsr_main.h"
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void hsr_forward_skb(struct sk_buff *skb, struct hsr_port *port);
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struct sk_buff *prp_create_tagged_frame(struct hsr_frame_info *frame,
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struct hsr_port *port);
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struct sk_buff *hsr_create_tagged_frame(struct hsr_frame_info *frame,
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struct hsr_port *port);
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struct sk_buff *hsr_get_untagged_frame(struct hsr_frame_info *frame,
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struct hsr_port *port);
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struct sk_buff *prp_get_untagged_frame(struct hsr_frame_info *frame,
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struct hsr_port *port);
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bool prp_drop_frame(struct hsr_frame_info *frame, struct hsr_port *port);
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void prp_fill_frame_info(__be16 proto, struct sk_buff *skb,
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struct hsr_frame_info *frame);
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void hsr_fill_frame_info(__be16 proto, struct sk_buff *skb,
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struct hsr_frame_info *frame);
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#endif /* __HSR_FORWARD_H */
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