From 8a6d48c0542876eb3acfc0970c0ab7872db08d5f Mon Sep 17 00:00:00 2001 From: Zheng Da Date: Sun, 6 Dec 2009 05:26:23 +0100 Subject: check in the original version of dde linux26. --- libdde_linux26/contrib/include/net/ah.h | 48 +++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 libdde_linux26/contrib/include/net/ah.h (limited to 'libdde_linux26/contrib/include/net/ah.h') diff --git a/libdde_linux26/contrib/include/net/ah.h b/libdde_linux26/contrib/include/net/ah.h new file mode 100644 index 00000000..ae1c322f --- /dev/null +++ b/libdde_linux26/contrib/include/net/ah.h @@ -0,0 +1,48 @@ +#ifndef _NET_AH_H +#define _NET_AH_H + +#include +#include + +/* This is the maximum truncated ICV length that we know of. */ +#define MAX_AH_AUTH_LEN 12 + +struct ah_data +{ + u8 *work_icv; + int icv_full_len; + int icv_trunc_len; + + struct crypto_hash *tfm; +}; + +static inline int ah_mac_digest(struct ah_data *ahp, struct sk_buff *skb, + u8 *auth_data) +{ + struct hash_desc desc; + int err; + + desc.tfm = ahp->tfm; + desc.flags = 0; + + memset(auth_data, 0, ahp->icv_trunc_len); + err = crypto_hash_init(&desc); + if (unlikely(err)) + goto out; + err = skb_icv_walk(skb, &desc, 0, skb->len, crypto_hash_update); + if (unlikely(err)) + goto out; + err = crypto_hash_final(&desc, ahp->work_icv); + +out: + return err; +} + +struct ip_auth_hdr; + +static inline struct ip_auth_hdr *ip_auth_hdr(const struct sk_buff *skb) +{ + return (struct ip_auth_hdr *)skb_transport_header(skb); +} + +#endif -- cgit v1.2.3