| 1 |
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| 2 | #ifndef _NET_ESP_H
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| 3 | #define _NET_ESP_H
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| 4 |
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| 5 | #include <linux/skbuff.h>
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| 6 |
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| 7 | struct ip_esp_hdr;
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| 8 | struct xfrm_state;
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| 9 |
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| 10 | static inline struct ip_esp_hdr *ip_esp_hdr(const struct sk_buff *skb)
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| 11 | {
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| 12 | return (struct ip_esp_hdr *)skb_transport_header(skb);
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| 13 | }
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| 14 |
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| 15 | static inline void esp_output_fill_trailer(u8 *tail, int tfclen, int plen, __u8 proto)
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| 16 | {
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| 17 |
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| 18 | if (tfclen) {
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| 19 | memset(tail, 0, tfclen);
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| 20 | tail += tfclen;
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| 21 | }
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| 22 | do {
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| 23 | int i;
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| 24 | for (i = 0; i < plen - 2; i++)
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| 25 | tail[i] = i + 1;
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| 26 | } while (0);
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| 27 | tail[plen - 2] = plen - 2;
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| 28 | tail[plen - 1] = proto;
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| 29 | }
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| 30 |
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| 31 | struct esp_info {
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| 32 | struct ip_esp_hdr *esph;
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| 33 | __be64 seqno;
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| 34 | int tfclen;
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| 35 | int tailen;
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| 36 | int plen;
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| 37 | int clen;
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| 38 | int len;
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| 39 | int nfrags;
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| 40 | __u8 proto;
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| 41 | bool inplace;
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| 42 | };
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| 43 |
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| 44 | int esp_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
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| 45 | int esp_output_tail(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
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| 46 | int esp_input_done2(struct sk_buff *skb, int err);
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| 47 | int esp6_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
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| 48 | int esp6_output_tail(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
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| 49 | int esp6_input_done2(struct sk_buff *skb, int err);
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| 50 | #endif
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