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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xfrm_inout.h (1894B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#include <linux/ipv6.h>
      3#include <net/dsfield.h>
      4#include <net/xfrm.h>
      5
      6#ifndef XFRM_INOUT_H
      7#define XFRM_INOUT_H 1
      8
      9static inline void xfrm4_extract_header(struct sk_buff *skb)
     10{
     11	const struct iphdr *iph = ip_hdr(skb);
     12
     13	XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
     14	XFRM_MODE_SKB_CB(skb)->id = iph->id;
     15	XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off;
     16	XFRM_MODE_SKB_CB(skb)->tos = iph->tos;
     17	XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl;
     18	XFRM_MODE_SKB_CB(skb)->optlen = iph->ihl * 4 - sizeof(*iph);
     19	memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0,
     20	       sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
     21}
     22
     23static inline void xfrm6_extract_header(struct sk_buff *skb)
     24{
     25#if IS_ENABLED(CONFIG_IPV6)
     26	struct ipv6hdr *iph = ipv6_hdr(skb);
     27
     28	XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
     29	XFRM_MODE_SKB_CB(skb)->id = 0;
     30	XFRM_MODE_SKB_CB(skb)->frag_off = htons(IP_DF);
     31	XFRM_MODE_SKB_CB(skb)->tos = ipv6_get_dsfield(iph);
     32	XFRM_MODE_SKB_CB(skb)->ttl = iph->hop_limit;
     33	XFRM_MODE_SKB_CB(skb)->optlen = 0;
     34	memcpy(XFRM_MODE_SKB_CB(skb)->flow_lbl, iph->flow_lbl,
     35	       sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
     36#else
     37	WARN_ON_ONCE(1);
     38#endif
     39}
     40
     41static inline void xfrm6_beet_make_header(struct sk_buff *skb)
     42{
     43	struct ipv6hdr *iph = ipv6_hdr(skb);
     44
     45	iph->version = 6;
     46
     47	memcpy(iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl,
     48	       sizeof(iph->flow_lbl));
     49	iph->nexthdr = XFRM_MODE_SKB_CB(skb)->protocol;
     50
     51	ipv6_change_dsfield(iph, 0, XFRM_MODE_SKB_CB(skb)->tos);
     52	iph->hop_limit = XFRM_MODE_SKB_CB(skb)->ttl;
     53}
     54
     55static inline void xfrm4_beet_make_header(struct sk_buff *skb)
     56{
     57	struct iphdr *iph = ip_hdr(skb);
     58
     59	iph->ihl = 5;
     60	iph->version = 4;
     61
     62	iph->protocol = XFRM_MODE_SKB_CB(skb)->protocol;
     63	iph->tos = XFRM_MODE_SKB_CB(skb)->tos;
     64
     65	iph->id = XFRM_MODE_SKB_CB(skb)->id;
     66	iph->frag_off = XFRM_MODE_SKB_CB(skb)->frag_off;
     67	iph->ttl = XFRM_MODE_SKB_CB(skb)->ttl;
     68}
     69
     70#endif