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esp4: support ipv6 nexthdrs process for beet gso segment

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For beet mode, when it's ipv6 inner address with nexthdrs set,
the packet format might be:

    ----------------------------------------------------
    | outer  |     | dest |     |      |  ESP    | ESP |
    | IP hdr | ESP | opts.| TCP | Data | Trailer | ICV |
    ----------------------------------------------------

Before doing gso segment in xfrm4_beet_gso_segment(), the same
thing is needed as it does in xfrm6_beet_gso_segment() in last
patch 'esp6: support ipv6 nexthdrs process for beet gso segment'.

v1->v2:
  - remove skb_transport_offset(), as it will always return 0
    in xfrm6_beet_gso_segment(), thank Sabrina's check.

Fixes: 384a46ea7b ("esp4: add gso_segment for esp4 beet mode")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Xin Long 2020-04-19 16:11:02 +08:00 committed by Steffen Klassert
parent 25a44ae93d
commit 6f297068a0
1 changed files with 9 additions and 4 deletions
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13
net/ipv4/esp4_offload.c
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@ -137,7 +137,7 @@ static struct sk_buff *xfrm4_beet_gso_segment(struct xfrm_state *x,
struct xfrm_offload *xo = xfrm_offload(skb);
struct sk_buff *segs = ERR_PTR(-EINVAL);
const struct net_offload *ops;
int proto = xo->proto;
u8 proto = xo->proto;
skb->transport_header += x->props.header_len;
@ -146,10 +146,15 @@ static struct sk_buff *xfrm4_beet_gso_segment(struct xfrm_state *x,
skb->transport_header += ph->hdrlen * 8;
proto = ph->nexthdr;
} else if (x->sel.family != AF_INET6) {
} else if (x->sel.family == AF_INET6) {
__be16 frag;
skb->transport_header +=
ipv6_skip_exthdr(skb, 0, &proto, &frag);
if (proto == IPPROTO_TCP)
skb_shinfo(skb)->gso_type |= SKB_GSO_TCPV4;
} else {
skb->transport_header -= IPV4_BEET_PHMAXLEN;
} else if (proto == IPPROTO_TCP) {
skb_shinfo(skb)->gso_type |= SKB_GSO_TCPV4;
}
__skb_pull(skb, skb_transport_offset(skb));