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70 lines
1.8 KiB
70 lines
1.8 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#include <linux/ipv6.h> |
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#include <net/dsfield.h> |
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#include <net/xfrm.h> |
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#ifndef XFRM_INOUT_H |
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#define XFRM_INOUT_H 1 |
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static inline void xfrm4_extract_header(struct sk_buff *skb) |
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{ |
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const struct iphdr *iph = ip_hdr(skb); |
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XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph); |
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XFRM_MODE_SKB_CB(skb)->id = iph->id; |
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XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off; |
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XFRM_MODE_SKB_CB(skb)->tos = iph->tos; |
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XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl; |
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XFRM_MODE_SKB_CB(skb)->optlen = iph->ihl * 4 - sizeof(*iph); |
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memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0, |
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sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl)); |
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} |
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static inline void xfrm6_extract_header(struct sk_buff *skb) |
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{ |
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#if IS_ENABLED(CONFIG_IPV6) |
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struct ipv6hdr *iph = ipv6_hdr(skb); |
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XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph); |
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XFRM_MODE_SKB_CB(skb)->id = 0; |
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XFRM_MODE_SKB_CB(skb)->frag_off = htons(IP_DF); |
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XFRM_MODE_SKB_CB(skb)->tos = ipv6_get_dsfield(iph); |
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XFRM_MODE_SKB_CB(skb)->ttl = iph->hop_limit; |
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XFRM_MODE_SKB_CB(skb)->optlen = 0; |
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memcpy(XFRM_MODE_SKB_CB(skb)->flow_lbl, iph->flow_lbl, |
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sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl)); |
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#else |
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WARN_ON_ONCE(1); |
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#endif |
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} |
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static inline void xfrm6_beet_make_header(struct sk_buff *skb) |
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{ |
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struct ipv6hdr *iph = ipv6_hdr(skb); |
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iph->version = 6; |
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memcpy(iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl, |
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sizeof(iph->flow_lbl)); |
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iph->nexthdr = XFRM_MODE_SKB_CB(skb)->protocol; |
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ipv6_change_dsfield(iph, 0, XFRM_MODE_SKB_CB(skb)->tos); |
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iph->hop_limit = XFRM_MODE_SKB_CB(skb)->ttl; |
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} |
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static inline void xfrm4_beet_make_header(struct sk_buff *skb) |
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{ |
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struct iphdr *iph = ip_hdr(skb); |
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iph->ihl = 5; |
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iph->version = 4; |
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iph->protocol = XFRM_MODE_SKB_CB(skb)->protocol; |
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iph->tos = XFRM_MODE_SKB_CB(skb)->tos; |
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iph->id = XFRM_MODE_SKB_CB(skb)->id; |
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iph->frag_off = XFRM_MODE_SKB_CB(skb)->frag_off; |
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iph->ttl = XFRM_MODE_SKB_CB(skb)->ttl; |
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} |
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#endif
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