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b17f709a24
Add if_tunnel flag TUNNEL_ENCAP_FLAG_REMCSUM to configure remote checksum offload on an IP tunnel. Add logic in gue_build_header to insert remote checksum offload option. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
38 lines
786 B
C
38 lines
786 B
C
#ifndef __NET_FOU_H
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#define __NET_FOU_H
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#include <linux/skbuff.h>
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#include <net/flow.h>
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#include <net/gue.h>
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#include <net/ip_tunnels.h>
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#include <net/udp.h>
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int fou_build_header(struct sk_buff *skb, struct ip_tunnel_encap *e,
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u8 *protocol, struct flowi4 *fl4);
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int gue_build_header(struct sk_buff *skb, struct ip_tunnel_encap *e,
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u8 *protocol, struct flowi4 *fl4);
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static size_t fou_encap_hlen(struct ip_tunnel_encap *e)
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{
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return sizeof(struct udphdr);
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}
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static size_t gue_encap_hlen(struct ip_tunnel_encap *e)
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{
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size_t len;
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bool need_priv = false;
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len = sizeof(struct udphdr) + sizeof(struct guehdr);
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if (e->flags & TUNNEL_ENCAP_FLAG_REMCSUM) {
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len += GUE_PLEN_REMCSUM;
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need_priv = true;
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}
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len += need_priv ? GUE_LEN_PRIV : 0;
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return len;
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}
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#endif
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