Release 4.14 net/ipv6/xfrm6_mode_tunnel.c
/*
* xfrm6_mode_tunnel.c - Tunnel mode encapsulation for IPv6.
*
* Copyright (C) 2002 USAGI/WIDE Project
* 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/dsfield.h>
#include <net/dst.h>
#include <net/inet_ecn.h>
#include <net/ip6_route.h>
#include <net/ipv6.h>
#include <net/xfrm.h>
static inline void ipip6_ecn_decapsulate(struct sk_buff *skb)
{
struct ipv6hdr *inner_iph = ipipv6_hdr(skb);
if (INET_ECN_is_ce(XFRM_MODE_SKB_CB(skb)->tos))
IP6_ECN_set_ce(skb, inner_iph);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Xu | 32 | 78.05% | 1 | 25.00% |
| Thomas Egerer | 4 | 9.76% | 1 | 25.00% |
| Arnaldo Carvalho de Melo | 3 | 7.32% | 1 | 25.00% |
| Eric Dumazet | 2 | 4.88% | 1 | 25.00% |
| Total | 41 | 100.00% | 4 | 100.00% |
/* Add encapsulation header.
*
* The top IP header will be constructed per RFC 2401.
*/
static int xfrm6_mode_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
{
struct dst_entry *dst = skb_dst(skb);
struct ipv6hdr *top_iph;
int dsfield;
skb_set_inner_network_header(skb, skb_network_offset(skb));
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 ipv6hdr, nexthdr);
skb->transport_header = skb->network_header + sizeof(*top_iph);
top_iph = ipv6_hdr(skb);
top_iph->version = 6;
memcpy(top_iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl,
sizeof(top_iph->flow_lbl));
top_iph->nexthdr = xfrm_af2proto(skb_dst(skb)->ops->family);
if (x->props.extra_flags & XFRM_SA_XFLAG_DONT_ENCAP_DSCP)
dsfield = 0;
else
dsfield = XFRM_MODE_SKB_CB(skb)->tos;
dsfield = INET_ECN_encapsulate(dsfield, XFRM_MODE_SKB_CB(skb)->tos);
if (x->props.flags & XFRM_STATE_NOECN)
dsfield &= ~INET_ECN_MASK;
ipv6_change_dsfield(top_iph, 0, dsfield);
top_iph->hop_limit = ip6_dst_hoplimit(dst->child);
top_iph->saddr = *(struct in6_addr *)&x->props.saddr;
top_iph->daddr = *(struct in6_addr *)&x->id.daddr;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Xu | 178 | 69.53% | 6 | 37.50% |
| Nicolas Dichtel | 21 | 8.20% | 1 | 6.25% |
| Ilan Tayari | 20 | 7.81% | 1 | 6.25% |
| Arnaldo Carvalho de Melo | 8 | 3.12% | 2 | 12.50% |
| Miika Komu | 7 | 2.73% | 1 | 6.25% |
| Kazunori Miyazawa | 6 | 2.34% | 1 | 6.25% |
| Eric Dumazet | 6 | 2.34% | 1 | 6.25% |
| Jamal Hadi Salim | 5 | 1.95% | 1 | 6.25% |
| Alexey Dobriyan | 4 | 1.56% | 1 | 6.25% |
| David S. Miller | 1 | 0.39% | 1 | 6.25% |
| Total | 256 | 100.00% | 16 | 100.00% |
#define for_each_input_rcu(head, handler) \
for (handler = rcu_dereference(head); \
handler != NULL; \
handler = rcu_dereference(handler->next))
static int xfrm6_mode_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
{
int err = -EINVAL;
if (XFRM_MODE_SKB_CB(skb)->protocol != IPPROTO_IPV6)
goto out;
if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
goto out;
err = skb_unclone(skb, GFP_ATOMIC);
if (err)
goto out;
if (x->props.flags & XFRM_STATE_DECAP_DSCP)
ipv6_copy_dscp(ipv6_get_dsfield(ipv6_hdr(skb)),
ipipv6_hdr(skb));
if (!(x->props.flags & XFRM_STATE_NOECN))
ipip6_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 | 113 | 85.61% | 4 | 33.33% |
| Arnaldo Carvalho de Melo | 10 | 7.58% | 4 | 33.33% |
| Stephen Hemminger | 4 | 3.03% | 1 | 8.33% |
| Miika Komu | 2 | 1.52% | 1 | 8.33% |
| Eric Dumazet | 2 | 1.52% | 1 | 8.33% |
| Pravin B Shelar | 1 | 0.76% | 1 | 8.33% |
| Total | 132 | 100.00% | 12 | 100.00% |
static struct sk_buff *xfrm6_mode_tunnel_gso_segment(struct xfrm_state *x,
struct sk_buff *skb,
netdev_features_t features)
{
__skb_push(skb, skb->mac_len);
return skb_mac_gso_segment(skb, features);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Steffen Klassert | 38 | 100.00% | 1 | 100.00% |
| Total | 38 | 100.00% | 1 | 100.00% |
static void xfrm6_mode_tunnel_xmit(struct xfrm_state *x, struct sk_buff *skb)
{
struct xfrm_offload *xo = xfrm_offload(skb);
if (xo->flags & XFRM_GSO_SEGMENT) {
skb->network_header = skb->network_header - x->props.header_len;
skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
}
skb_reset_mac_len(skb);
pskb_pull(skb, skb->mac_len + x->props.header_len);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Steffen Klassert | 84 | 100.00% | 1 | 100.00% |
| Total | 84 | 100.00% | 1 | 100.00% |
static struct xfrm_mode xfrm6_tunnel_mode = {
.input2 = xfrm6_mode_tunnel_input,
.input = xfrm_prepare_input,
.output2 = xfrm6_mode_tunnel_output,
.output = xfrm6_prepare_output,
.gso_segment = xfrm6_mode_tunnel_gso_segment,
.xmit = xfrm6_mode_tunnel_xmit,
.owner = THIS_MODULE,
.encap = XFRM_MODE_TUNNEL,
.flags = XFRM_MODE_FLAG_TUNNEL,
};
static int __init xfrm6_mode_tunnel_init(void)
{
return xfrm_register_mode(&xfrm6_tunnel_mode, AF_INET6);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Xu | 18 | 100.00% | 2 | 100.00% |
| Total | 18 | 100.00% | 2 | 100.00% |
static void __exit xfrm6_mode_tunnel_exit(void)
{
int err;
err = xfrm_unregister_mode(&xfrm6_tunnel_mode, AF_INET6);
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(xfrm6_mode_tunnel_init);
module_exit(xfrm6_mode_tunnel_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS_XFRM_MODE(AF_INET6, XFRM_MODE_TUNNEL);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Xu | 464 | 64.62% | 10 | 33.33% |
| Steffen Klassert | 142 | 19.78% | 2 | 6.67% |
| Nicolas Dichtel | 21 | 2.92% | 1 | 3.33% |
| Arnaldo Carvalho de Melo | 21 | 2.92% | 4 | 13.33% |
| Ilan Tayari | 20 | 2.79% | 1 | 3.33% |
| Eric Dumazet | 10 | 1.39% | 3 | 10.00% |
| Miika Komu | 9 | 1.25% | 1 | 3.33% |
| Kazunori Miyazawa | 6 | 0.84% | 1 | 3.33% |
| Jamal Hadi Salim | 5 | 0.70% | 1 | 3.33% |
| Thomas Egerer | 4 | 0.56% | 1 | 3.33% |
| Stephen Hemminger | 4 | 0.56% | 1 | 3.33% |
| Alexey Dobriyan | 4 | 0.56% | 1 | 3.33% |
| David S. Miller | 4 | 0.56% | 1 | 3.33% |
| Tejun Heo | 3 | 0.42% | 1 | 3.33% |
| Pravin B Shelar | 1 | 0.14% | 1 | 3.33% |
| Total | 718 | 100.00% | 30 | 100.00% |
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