| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef _NET_ESP_H |
| 3 | #define _NET_ESP_H |
| 4 | |
| 5 | #include <linux/skbuff.h> |
| 6 | |
| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 7 | #define ESP_SKB_FRAG_MAXSIZE (PAGE_SIZE << SKB_FRAG_PAGE_ORDER) |
| 8 | |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 9 | struct ip_esp_hdr; |
| 10 | |
| 11 | static inline struct ip_esp_hdr *ip_esp_hdr(const struct sk_buff *skb) |
| 12 | { |
| 13 | return (struct ip_esp_hdr *)skb_transport_header(skb); |
| 14 | } |
| 15 | |
| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 16 | static inline void esp_output_fill_trailer(u8 *tail, int tfclen, int plen, __u8 proto) |
| 17 | { |
| 18 | /* Fill padding... */ |
| 19 | if (tfclen) { |
| 20 | memset(tail, 0, tfclen); |
| 21 | tail += tfclen; |
| 22 | } |
| 23 | do { |
| 24 | int i; |
| 25 | for (i = 0; i < plen - 2; i++) |
| 26 | tail[i] = i + 1; |
| 27 | } while (0); |
| 28 | tail[plen - 2] = plen - 2; |
| 29 | tail[plen - 1] = proto; |
| 30 | } |
| 31 | |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 32 | struct esp_info { |
| 33 | struct ip_esp_hdr *esph; |
| 34 | __be64 seqno; |
| 35 | int tfclen; |
| 36 | int tailen; |
| 37 | int plen; |
| 38 | int clen; |
| 39 | int len; |
| 40 | int nfrags; |
| 41 | __u8 proto; |
| 42 | bool inplace; |
| 43 | }; |
| 44 | |
| 45 | int esp_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp); |
| 46 | int esp_output_tail(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp); |
| 47 | int esp_input_done2(struct sk_buff *skb, int err); |
| 48 | int esp6_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp); |
| 49 | int esp6_output_tail(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp); |
| 50 | int esp6_input_done2(struct sk_buff *skb, int err); |
| 51 | #endif |