cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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xfrm4_output.c (1168B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * xfrm4_output.c - Common IPsec encapsulation code for IPv4.
      4 * Copyright (c) 2004 Herbert Xu <herbert@gondor.apana.org.au>
      5 */
      6
      7#include <linux/if_ether.h>
      8#include <linux/kernel.h>
      9#include <linux/module.h>
     10#include <linux/skbuff.h>
     11#include <linux/netfilter_ipv4.h>
     12#include <net/dst.h>
     13#include <net/ip.h>
     14#include <net/xfrm.h>
     15#include <net/icmp.h>
     16
     17static int __xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb)
     18{
     19#ifdef CONFIG_NETFILTER
     20	struct xfrm_state *x = skb_dst(skb)->xfrm;
     21
     22	if (!x) {
     23		IPCB(skb)->flags |= IPSKB_REROUTED;
     24		return dst_output(net, sk, skb);
     25	}
     26#endif
     27
     28	return xfrm_output(sk, skb);
     29}
     30
     31int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb)
     32{
     33	return NF_HOOK_COND(NFPROTO_IPV4, NF_INET_POST_ROUTING,
     34			    net, sk, skb, skb->dev, skb_dst(skb)->dev,
     35			    __xfrm4_output,
     36			    !(IPCB(skb)->flags & IPSKB_REROUTED));
     37}
     38
     39void xfrm4_local_error(struct sk_buff *skb, u32 mtu)
     40{
     41	struct iphdr *hdr;
     42
     43	hdr = skb->encapsulation ? inner_ip_hdr(skb) : ip_hdr(skb);
     44	ip_local_error(skb->sk, EMSGSIZE, hdr->daddr,
     45		       inet_sk(skb->sk)->inet_dport, mtu);
     46}