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Diffstat (limited to 'net/ipv4/xfrm4_mode_tunnel.c')
-rw-r--r--net/ipv4/xfrm4_mode_tunnel.c152
1 files changed, 0 insertions, 152 deletions
diff --git a/net/ipv4/xfrm4_mode_tunnel.c b/net/ipv4/xfrm4_mode_tunnel.c
deleted file mode 100644
index 2a9764bd1719..000000000000
--- a/net/ipv4/xfrm4_mode_tunnel.c
+++ /dev/null
@@ -1,152 +0,0 @@
-/*
- * 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);
-}
-
-/* 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_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 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(xfrm_dst_child(dst));
-
- 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;
-}
-
-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);
- if (skb->mac_len)
- eth_hdr(skb)->h_proto = skb->protocol;
-
- err = 0;
-
-out:
- return err;
-}
-
-static struct sk_buff *xfrm4_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);
-}
-
-static void xfrm4_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->transport_header = skb->network_header +
- sizeof(struct iphdr);
-
- skb_reset_mac_len(skb);
- pskb_pull(skb, skb->mac_len + x->props.header_len);
-}
-
-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,
- .gso_segment = xfrm4_mode_tunnel_gso_segment,
- .xmit = xfrm4_mode_tunnel_xmit,
- .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);
-}
-
-static void __exit xfrm4_mode_tunnel_exit(void)
-{
- int err;
-
- err = xfrm_unregister_mode(&xfrm4_tunnel_mode, AF_INET);
- BUG_ON(err);
-}
-
-module_init(xfrm4_mode_tunnel_init);
-module_exit(xfrm4_mode_tunnel_exit);
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_XFRM_MODE(AF_INET, XFRM_MODE_TUNNEL);