mirror of
https://github.com/torvalds/linux.git
synced 2024-11-10 14:11:52 +00:00
171916cbd5
The function only initializes the XFRM CB in the skb.
After previous patch xfrm4_extract_header is only called from
net/xfrm/xfrm_{input,output}.c.
Because of IPV6=m linker errors the ipv6 equivalent
(xfrm6_extract_header) was already placed in xfrm_inout.h because
we can't call functions residing in a module from the core.
So do the same for the ipv4 helper and place it next to the ipv6 one.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#include <linux/ipv6.h>
|
|
#include <net/dsfield.h>
|
|
#include <net/xfrm.h>
|
|
|
|
#ifndef XFRM_INOUT_H
|
|
#define XFRM_INOUT_H 1
|
|
|
|
static inline void xfrm4_extract_header(struct sk_buff *skb)
|
|
{
|
|
const struct iphdr *iph = ip_hdr(skb);
|
|
|
|
XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
|
|
XFRM_MODE_SKB_CB(skb)->id = iph->id;
|
|
XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off;
|
|
XFRM_MODE_SKB_CB(skb)->tos = iph->tos;
|
|
XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl;
|
|
XFRM_MODE_SKB_CB(skb)->optlen = iph->ihl * 4 - sizeof(*iph);
|
|
memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0,
|
|
sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
|
|
}
|
|
|
|
static inline void xfrm6_extract_header(struct sk_buff *skb)
|
|
{
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
struct ipv6hdr *iph = ipv6_hdr(skb);
|
|
|
|
XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
|
|
XFRM_MODE_SKB_CB(skb)->id = 0;
|
|
XFRM_MODE_SKB_CB(skb)->frag_off = htons(IP_DF);
|
|
XFRM_MODE_SKB_CB(skb)->tos = ipv6_get_dsfield(iph);
|
|
XFRM_MODE_SKB_CB(skb)->ttl = iph->hop_limit;
|
|
XFRM_MODE_SKB_CB(skb)->optlen = 0;
|
|
memcpy(XFRM_MODE_SKB_CB(skb)->flow_lbl, iph->flow_lbl,
|
|
sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
|
|
#else
|
|
WARN_ON_ONCE(1);
|
|
#endif
|
|
}
|
|
|
|
static inline void xfrm6_beet_make_header(struct sk_buff *skb)
|
|
{
|
|
struct ipv6hdr *iph = ipv6_hdr(skb);
|
|
|
|
iph->version = 6;
|
|
|
|
memcpy(iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl,
|
|
sizeof(iph->flow_lbl));
|
|
iph->nexthdr = XFRM_MODE_SKB_CB(skb)->protocol;
|
|
|
|
ipv6_change_dsfield(iph, 0, XFRM_MODE_SKB_CB(skb)->tos);
|
|
iph->hop_limit = XFRM_MODE_SKB_CB(skb)->ttl;
|
|
}
|
|
|
|
static inline void xfrm4_beet_make_header(struct sk_buff *skb)
|
|
{
|
|
struct iphdr *iph = ip_hdr(skb);
|
|
|
|
iph->ihl = 5;
|
|
iph->version = 4;
|
|
|
|
iph->protocol = XFRM_MODE_SKB_CB(skb)->protocol;
|
|
iph->tos = XFRM_MODE_SKB_CB(skb)->tos;
|
|
|
|
iph->id = XFRM_MODE_SKB_CB(skb)->id;
|
|
iph->frag_off = XFRM_MODE_SKB_CB(skb)->frag_off;
|
|
iph->ttl = XFRM_MODE_SKB_CB(skb)->ttl;
|
|
}
|
|
|
|
#endif
|