915d7e5e59
This patch adds the necessary hooks and structures to provide support for SR-IPv6 control plane, essentially the Generic Netlink commands that will be used for userspace control over the Segment Routing kernel structures. The genetlink commands provide control over two different structures: tunnel source and HMAC data. The tunnel source is the source address that will be used by default when encapsulating packets into an outer IPv6 header + SRH. If the tunnel source is set to :: then an address of the outgoing interface will be selected as the source. The HMAC commands currently just return ENOTSUPP and will be implemented in a future patch. Signed-off-by: David Lebrun <david.lebrun@uclouvain.be> Signed-off-by: David S. Miller <davem@davemloft.net>
53 lines
1.1 KiB
C
53 lines
1.1 KiB
C
/*
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* SR-IPv6 implementation
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*
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* Author:
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* David Lebrun <david.lebrun@uclouvain.be>
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*
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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 the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _NET_SEG6_H
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#define _NET_SEG6_H
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#include <linux/net.h>
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#include <linux/ipv6.h>
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static inline void update_csum_diff4(struct sk_buff *skb, __be32 from,
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__be32 to)
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{
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__be32 diff[] = { ~from, to };
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skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum);
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}
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static inline void update_csum_diff16(struct sk_buff *skb, __be32 *from,
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__be32 *to)
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{
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__be32 diff[] = {
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~from[0], ~from[1], ~from[2], ~from[3],
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to[0], to[1], to[2], to[3],
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};
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skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum);
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}
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struct seg6_pernet_data {
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struct mutex lock;
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struct in6_addr __rcu *tun_src;
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};
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static inline struct seg6_pernet_data *seg6_pernet(struct net *net)
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{
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return net->ipv6.seg6_data;
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}
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extern int seg6_init(void);
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extern void seg6_exit(void);
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#endif
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