50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _NET_ESP_H
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#define _NET_ESP_H
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#include <linux/skbuff.h>
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struct ip_esp_hdr;
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static inline struct ip_esp_hdr *ip_esp_hdr(const struct sk_buff *skb)
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{
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return (struct ip_esp_hdr *)skb_transport_header(skb);
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}
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static inline void esp_output_fill_trailer(u8 *tail, int tfclen, int plen, __u8 proto)
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{
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/* Fill padding... */
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if (tfclen) {
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memset(tail, 0, tfclen);
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tail += tfclen;
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}
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do {
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int i;
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for (i = 0; i < plen - 2; i++)
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tail[i] = i + 1;
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} while (0);
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tail[plen - 2] = plen - 2;
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tail[plen - 1] = proto;
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}
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struct esp_info {
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struct ip_esp_hdr *esph;
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__be64 seqno;
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int tfclen;
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int tailen;
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int plen;
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int clen;
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int len;
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int nfrags;
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__u8 proto;
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bool inplace;
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};
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int esp_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
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int esp_output_tail(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
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int esp_input_done2(struct sk_buff *skb, int err);
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int esp6_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
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int esp6_output_tail(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
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int esp6_input_done2(struct sk_buff *skb, int err);
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#endif
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