projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b3284df1 FW |
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 | ||
| 171916cb FW |
9 | static 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 | ||
| a269fbfc FW |
23 | static 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 | ||
| b3284df1 FW |
41 | static 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 | ||
| 55 | static 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 |