netfilter: nf_conntrack: support conntrack templates
[linux-2.6.git] / include / net / esp.h
index 90cd94f..d584513 100644 (file)
@@ -1,59 +1,25 @@
 #ifndef _NET_ESP_H
 #define _NET_ESP_H
 
-#include <net/xfrm.h>
-#include <asm/scatterlist.h>
+#include <linux/skbuff.h>
 
-#define ESP_NUM_FAST_SG                4
+struct crypto_aead;
 
-struct esp_data
-{
-       struct scatterlist              sgbuf[ESP_NUM_FAST_SG];
-
-       /* Confidentiality */
-       struct {
-               u8                      *key;           /* Key */
-               int                     key_len;        /* Key length */
-               u8                      *ivec;          /* ivec buffer */
-               /* ivlen is offset from enc_data, where encrypted data start.
-                * It is logically different of crypto_tfm_alg_ivsize(tfm).
-                * We assume that it is either zero (no ivec), or
-                * >= crypto_tfm_alg_ivsize(tfm). */
-               int                     ivlen;
-               int                     padlen;         /* 0..255 */
-               struct crypto_tfm       *tfm;           /* crypto handle */
-       } conf;
-
-       /* Integrity. It is active when icv_full_len != 0 */
-       struct {
-               u8                      *key;           /* Key */
-               int                     key_len;        /* Length of the key */
-               u8                      *work_icv;
-               int                     icv_full_len;
-               int                     icv_trunc_len;
-               void                    (*icv)(struct esp_data*,
-                                              struct sk_buff *skb,
-                                              int offset, int len, u8 *icv);
-               struct crypto_tfm       *tfm;
-       } auth;
+struct esp_data {
+       /* 0..255 */
+       int padlen;
+
+       /* Confidentiality & Integrity */
+       struct crypto_aead *aead;
 };
 
-extern int skb_to_sgvec(struct sk_buff *skb, struct scatterlist *sg, int offset, int len);
-extern int skb_cow_data(struct sk_buff *skb, int tailbits, struct sk_buff **trailer);
 extern void *pskb_put(struct sk_buff *skb, struct sk_buff *tail, int len);
 
-static inline void
-esp_hmac_digest(struct esp_data *esp, struct sk_buff *skb, int offset,
-                int len, u8 *auth_data)
+struct ip_esp_hdr;
+
+static inline struct ip_esp_hdr *ip_esp_hdr(const struct sk_buff *skb)
 {
-       struct crypto_tfm *tfm = esp->auth.tfm;
-       char *icv = esp->auth.work_icv;
-
-       memset(auth_data, 0, esp->auth.icv_trunc_len);
-       crypto_hmac_init(tfm, esp->auth.key, &esp->auth.key_len);
-       skb_icv_walk(skb, tfm, offset, len, crypto_hmac_update);
-       crypto_hmac_final(tfm, esp->auth.key, &esp->auth.key_len, icv);
-       memcpy(auth_data, icv, esp->auth.icv_trunc_len);
+       return (struct ip_esp_hdr *)skb_transport_header(skb);
 }
 
 #endif