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esp4: improve xfrm4_beet_gso_segment() to be more readable

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This patch is to improve the code to make xfrm4_beet_gso_segment()
more readable, and keep consistent with xfrm6_beet_gso_segment().

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 2020-05-18 13:35:19 +08:00 committed by Steffen Klassert
parent 56b1b7c667
commit 3ffb93ba32
1 changed files with 10 additions and 7 deletions
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17
net/ipv4/esp4_offload.c
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@ -141,20 +141,23 @@ static struct sk_buff *xfrm4_beet_gso_segment(struct xfrm_state *x,
skb->transport_header += x->props.header_len;
if (proto == IPPROTO_BEETPH) {
struct ip_beet_phdr *ph = (struct ip_beet_phdr *)skb->data;
if (x->sel.family != AF_INET6) {
if (proto == IPPROTO_BEETPH) {
struct ip_beet_phdr *ph =
(struct ip_beet_phdr *)skb->data;
skb->transport_header += ph->hdrlen * 8;
proto = ph->nexthdr;
} else if (x->sel.family == AF_INET6) {
skb->transport_header += ph->hdrlen * 8;
proto = ph->nexthdr;
} else {
skb->transport_header -= IPV4_BEET_PHMAXLEN;
}
} else {
__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;
}
__skb_pull(skb, skb_transport_offset(skb));