Release 4.11 net/ipv4/xfrm4_mode_tunnel.c
/*
* xfrm4_mode_tunnel.c - Tunnel mode encapsulation for IPv4.
*
* Copyright (c) 2004-2006 Herbert Xu <herbert@gondor.apana.org.au>
*/
#include <linux/gfp.h>
#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/inet_ecn.h>
#include <net/ip.h>
#include <net/xfrm.h>
static inline void ipip_ecn_decapsulate(struct sk_buff *skb)
{
struct iphdr *inner_iph = ipip_hdr(skb);
if (INET_ECN_is_ce(XFRM_MODE_SKB_CB(skb)->tos))
IP_ECN_set_ce(inner_iph);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Xu | 27 | 69.23% | 2 | 40.00% |
| Miika Komu | 8 | 20.51% | 1 | 20.00% |
| Arnaldo Carvalho de Melo | 4 | 10.26% | 2 | 40.00% |
| Total | 39 | 100.00% | 5 | 100.00% |
/* Add encapsulation header.
*
* The top IP header will be constructed per RFC 2401.
*/
static int xfrm4_mode_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
{
struct dst_entry *dst = skb_dst(skb);
struct iphdr *top_iph;
int flags;
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 + sizeof(*top_iph);
top_iph = ip_hdr(skb);
top_iph->ihl = 5;
top_iph->version = 4;
top_iph->protocol = xfrm_af2proto(skb_dst(skb)->ops->family);
/* DS disclosing depends on XFRM_SA_XFLAG_DONT_ENCAP_DSCP */
if (x->props.extra_flags & XFRM_SA_XFLAG_DONT_ENCAP_DSCP)
top_iph->tos = 0;
else
top_iph->tos = XFRM_MODE_SKB_CB(skb)->tos;
top_iph->tos = INET_ECN_encapsulate(top_iph->tos,
XFRM_MODE_SKB_CB(skb)->tos);
flags = x->props.flags;
if (flags & XFRM_STATE_NOECN)
IP_ECN_clear(top_iph);
top_iph->frag_off = (flags & XFRM_STATE_NOPMTUDISC) ?
0 : (XFRM_MODE_SKB_CB(skb)->frag_off & htons(IP_DF));
top_iph->ttl = ip4_dst_hoplimit(dst->child);
top_iph->saddr = x->props.saddr.a4;
top_iph->daddr = x->id.daddr.a4;
ip_select_ident(dev_net(dst->dev), skb, NULL);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Xu | 155 | 60.78% | 5 | 33.33% |
| Miika Komu | 30 | 11.76% | 1 | 6.67% |
| Nicolas Dichtel | 28 | 10.98% | 1 | 6.67% |
| Eric Dumazet | 13 | 5.10% | 2 | 13.33% |
| Steffen Klassert | 7 | 2.75% | 1 | 6.67% |
| Hannes Frederic Sowa | 7 | 2.75% | 1 | 6.67% |
| Kazunori Miyazawa | 6 | 2.35% | 1 | 6.67% |
| Jamal Hadi Salim | 5 | 1.96% | 1 | 6.67% |
| Arnaldo Carvalho de Melo | 3 | 1.18% | 1 | 6.67% |
| David S. Miller | 1 | 0.39% | 1 | 6.67% |
| Total | 255 | 100.00% | 15 | 100.00% |
static int xfrm4_mode_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
{
int err = -EINVAL;
if (XFRM_MODE_SKB_CB(skb)->protocol != IPPROTO_IPIP)
goto out;
if (!pskb_may_pull(skb, sizeof(struct iphdr)))
goto out;
err = skb_unclone(skb, GFP_ATOMIC);
if (err)
goto out;
if (x->props.flags & XFRM_STATE_DECAP_DSCP)
ipv4_copy_dscp(XFRM_MODE_SKB_CB(skb)->tos, ipip_hdr(skb));
if (!(x->props.flags & XFRM_STATE_NOECN))
ipip_ecn_decapsulate(skb);
skb_reset_network_header(skb);
skb_mac_header_rebuild(skb);
err = 0;
out:
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Xu | 114 | 87.02% | 4 | 36.36% |
| Arnaldo Carvalho de Melo | 7 | 5.34% | 3 | 27.27% |
| Stephen Hemminger | 4 | 3.05% | 1 | 9.09% |
| Miika Komu | 3 | 2.29% | 1 | 9.09% |
| Eric Dumazet | 2 | 1.53% | 1 | 9.09% |
| Pravin B Shelar | 1 | 0.76% | 1 | 9.09% |
| Total | 131 | 100.00% | 11 | 100.00% |
static struct xfrm_mode xfrm4_tunnel_mode = {
.input2 = xfrm4_mode_tunnel_input,
.input = xfrm_prepare_input,
.output2 = xfrm4_mode_tunnel_output,
.output = xfrm4_prepare_output,
.owner = THIS_MODULE,
.encap = XFRM_MODE_TUNNEL,
.flags = XFRM_MODE_FLAG_TUNNEL,
};
static int __init xfrm4_mode_tunnel_init(void)
{
return xfrm_register_mode(&xfrm4_tunnel_mode, AF_INET);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Xu | 18 | 100.00% | 2 | 100.00% |
| Total | 18 | 100.00% | 2 | 100.00% |
static void __exit xfrm4_mode_tunnel_exit(void)
{
int err;
err = xfrm_unregister_mode(&xfrm4_tunnel_mode, AF_INET);
BUG_ON(err);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Xu | 27 | 100.00% | 2 | 100.00% |
| Total | 27 | 100.00% | 2 | 100.00% |
module_init(xfrm4_mode_tunnel_init);
module_exit(xfrm4_mode_tunnel_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS_XFRM_MODE(AF_INET, XFRM_MODE_TUNNEL);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Xu | 434 | 76.68% | 9 | 33.33% |
| Miika Komu | 41 | 7.24% | 1 | 3.70% |
| Nicolas Dichtel | 28 | 4.95% | 1 | 3.70% |
| Eric Dumazet | 15 | 2.65% | 3 | 11.11% |
| Arnaldo Carvalho de Melo | 14 | 2.47% | 5 | 18.52% |
| Steffen Klassert | 7 | 1.24% | 1 | 3.70% |
| Hannes Frederic Sowa | 7 | 1.24% | 1 | 3.70% |
| Kazunori Miyazawa | 6 | 1.06% | 1 | 3.70% |
| Jamal Hadi Salim | 5 | 0.88% | 1 | 3.70% |
| Stephen Hemminger | 4 | 0.71% | 1 | 3.70% |
| Tejun Heo | 3 | 0.53% | 1 | 3.70% |
| Pravin B Shelar | 1 | 0.18% | 1 | 3.70% |
| David S. Miller | 1 | 0.18% | 1 | 3.70% |
| Total | 566 | 100.00% | 27 | 100.00% |
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