Release 4.15 net/ipv4/xfrm4_mode_transport.c
/*
* xfrm4_mode_transport.c - Transport mode encapsulation for IPv4.
*
* Copyright (c) 2004-2006 Herbert Xu <herbert@gondor.apana.org.au>
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/stringify.h>
#include <net/dst.h>
#include <net/ip.h>
#include <net/xfrm.h>
#include <net/protocol.h>
/* Add encapsulation header.
*
* The IP header will be moved forward to make space for the encapsulation
* header.
*/
static int xfrm4_transport_output(struct xfrm_state *x, struct sk_buff *skb)
{
struct iphdr *iph = ip_hdr(skb);
int ihl = iph->ihl * 4;
skb_set_inner_transport_header(skb, skb_transport_offset(skb));
skb_set_network_header(skb, -x->props.header_len);
skb->mac_header = skb->network_header +
offsetof(struct iphdr, protocol);
skb->transport_header = skb->network_header + ihl;
__skb_pull(skb, ihl);
memmove(skb_network_header(skb), iph, ihl);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Xu | 69 | 65.71% | 3 | 37.50% |
| Arnaldo Carvalho de Melo | 21 | 20.00% | 3 | 37.50% |
| Ilan Tayari | 10 | 9.52% | 1 | 12.50% |
| Jamal Hadi Salim | 5 | 4.76% | 1 | 12.50% |
| Total | 105 | 100.00% | 8 | 100.00% |
/* Remove encapsulation header.
*
* The IP header will be moved over the top of the encapsulation header.
*
* On entry, skb->h shall point to where the IP header should be and skb->nh
* shall be set to where the IP header currently is. skb->data shall point
* to the start of the payload.
*/
static int xfrm4_transport_input(struct xfrm_state *x, struct sk_buff *skb)
{
int ihl = skb->data - skb_transport_header(skb);
struct xfrm_offload *xo = xfrm_offload(skb);
if (skb->transport_header != skb->network_header) {
memmove(skb_transport_header(skb),
skb_network_header(skb), ihl);
skb->network_header = skb->transport_header;
}
ip_hdr(skb)->tot_len = htons(skb->len + ihl);
if (!xo || !(xo->flags & XFRM_GRO))
skb_reset_transport_header(skb);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Xu | 61 | 54.95% | 2 | 22.22% |
| Arnaldo Carvalho de Melo | 26 | 23.42% | 6 | 66.67% |
| Steffen Klassert | 24 | 21.62% | 1 | 11.11% |
| Total | 111 | 100.00% | 9 | 100.00% |
static struct sk_buff *xfrm4_transport_gso_segment(struct xfrm_state *x,
struct sk_buff *skb,
netdev_features_t features)
{
const struct net_offload *ops;
struct sk_buff *segs = ERR_PTR(-EINVAL);
struct xfrm_offload *xo = xfrm_offload(skb);
skb->transport_header += x->props.header_len;
ops = rcu_dereference(inet_offloads[xo->proto]);
if (likely(ops && ops->callbacks.gso_segment))
segs = ops->callbacks.gso_segment(skb, features);
return segs;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Steffen Klassert | 99 | 100.00% | 1 | 100.00% |
| Total | 99 | 100.00% | 1 | 100.00% |
static void xfrm4_transport_xmit(struct xfrm_state *x, struct sk_buff *skb)
{
struct xfrm_offload *xo = xfrm_offload(skb);
skb_reset_mac_len(skb);
pskb_pull(skb, skb->mac_len + sizeof(struct iphdr) + x->props.header_len);
if (xo->flags & XFRM_GSO_SEGMENT) {
skb_reset_transport_header(skb);
skb->transport_header -= x->props.header_len;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Steffen Klassert | 77 | 100.00% | 1 | 100.00% |
| Total | 77 | 100.00% | 1 | 100.00% |
static struct xfrm_mode xfrm4_transport_mode = {
.input = xfrm4_transport_input,
.output = xfrm4_transport_output,
.gso_segment = xfrm4_transport_gso_segment,
.xmit = xfrm4_transport_xmit,
.owner = THIS_MODULE,
.encap = XFRM_MODE_TRANSPORT,
};
static int __init xfrm4_transport_init(void)
{
return xfrm_register_mode(&xfrm4_transport_mode, AF_INET);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Xu | 18 | 100.00% | 1 | 100.00% |
| Total | 18 | 100.00% | 1 | 100.00% |
static void __exit xfrm4_transport_exit(void)
{
int err;
err = xfrm_unregister_mode(&xfrm4_transport_mode, AF_INET);
BUG_ON(err);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Xu | 27 | 100.00% | 1 | 100.00% |
| Total | 27 | 100.00% | 1 | 100.00% |
module_init(xfrm4_transport_init);
module_exit(xfrm4_transport_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS_XFRM_MODE(AF_INET, XFRM_MODE_TRANSPORT);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Xu | 251 | 47.72% | 4 | 26.67% |
| Steffen Klassert | 213 | 40.49% | 2 | 13.33% |
| Arnaldo Carvalho de Melo | 47 | 8.94% | 7 | 46.67% |
| Ilan Tayari | 10 | 1.90% | 1 | 6.67% |
| Jamal Hadi Salim | 5 | 0.95% | 1 | 6.67% |
| Total | 526 | 100.00% | 15 | 100.00% |
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