int clen;
int alen;
int nfrags;
+ u8 *tail;
struct esp_data *esp = x->data;
int hdr_len = (skb_transport_offset(skb) +
sizeof(*esph) + esp->conf.ivlen);
}
/* Fill padding... */
+ tail = skb_tail_pointer(trailer);
do {
int i;
for (i=0; i<clen-skb->len - 2; i++)
- *(u8*)(trailer->tail + i) = i+1;
+ tail[i] = i + 1;
} while (0);
- *(u8*)(trailer->tail + clen-skb->len - 2) = (clen - skb->len)-2;
+ tail[clen-skb->len - 2] = (clen - skb->len) - 2;
pskb_put(skb, trailer, clen - skb->len);
- top_iph = (struct ipv6hdr *)__skb_push(skb, hdr_len);
- esph = (struct ipv6_esp_hdr *)skb->h.raw;
+ __skb_push(skb, -skb_network_offset(skb));
+ top_iph = ipv6_hdr(skb);
+ esph = (struct ipv6_esp_hdr *)skb_transport_header(skb);
top_iph->payload_len = htons(skb->len + alen - sizeof(*top_iph));
- *(u8 *)(trailer->tail - 1) = *skb_network_header(skb);
- *skb_network_header(skb) = IPPROTO_ESP;
+ *(skb_tail_pointer(trailer) - 1) = *skb_mac_header(skb);
+ *skb_mac_header(skb) = IPPROTO_ESP;
esph->spi = x->id.spi;
- esph->seq_no = htonl(++x->replay.oseq);
- xfrm_aevent_doreplay(x);
+ esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq);
if (esp->conf.ivlen) {
if (unlikely(!esp->conf.ivinitted)) {
int blksize = ALIGN(crypto_blkcipher_blocksize(tfm), 4);
int alen = esp->auth.icv_trunc_len;
int elen = skb->len - sizeof(struct ipv6_esp_hdr) - esp->conf.ivlen - alen;
-
- int hdr_len = skb->h.raw - skb->nh.raw;
+ int hdr_len = skb_network_header_len(skb);
int nfrags;
int ret = 0;
ret = nexthdr[1];
}
- skb->h.raw = __skb_pull(skb, sizeof(*esph) + esp->conf.ivlen) - hdr_len;
-
+ __skb_pull(skb, sizeof(*esph) + esp->conf.ivlen);
+ skb_set_transport_header(skb, -hdr_len);
out:
return ret;
}
-static u32 esp6_get_max_size(struct xfrm_state *x, int mtu)
+static u32 esp6_get_mtu(struct xfrm_state *x, int mtu)
{
struct esp_data *esp = x->data;
u32 blksize = ALIGN(crypto_blkcipher_blocksize(esp->conf.tfm), 4);
+ u32 align = max_t(u32, blksize, esp->conf.padlen);
+ u32 rem;
- if (x->props.mode == XFRM_MODE_TUNNEL) {
- mtu = ALIGN(mtu + 2, blksize);
- } else {
- /* The worst case. */
+ mtu -= x->props.header_len + esp->auth.icv_trunc_len;
+ rem = mtu & (align - 1);
+ mtu &= ~(align - 1);
+
+ if (x->props.mode != XFRM_MODE_TUNNEL) {
u32 padsize = ((blksize - 1) & 7) + 1;
- mtu = ALIGN(mtu + 2, padsize) + blksize - padsize;
+ mtu -= blksize - padsize;
+ mtu += min_t(u32, blksize - padsize, rem);
}
- if (esp->conf.padlen)
- mtu = ALIGN(mtu, esp->conf.padlen);
- return mtu + x->props.header_len + esp->auth.icv_trunc_len;
+ return mtu - 2;
}
static void esp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
struct esp_data *esp = NULL;
struct crypto_blkcipher *tfm;
- /* null auth and encryption can have zero length keys */
- if (x->aalg) {
- if (x->aalg->alg_key_len > 512)
- goto error;
- }
if (x->ealg == NULL)
goto error;
struct xfrm_algo_desc *aalg_desc;
struct crypto_hash *hash;
- esp->auth.key = x->aalg->alg_key;
- esp->auth.key_len = (x->aalg->alg_key_len+7)/8;
hash = crypto_alloc_hash(x->aalg->alg_name, 0,
CRYPTO_ALG_ASYNC);
if (IS_ERR(hash))
goto error;
esp->auth.tfm = hash;
- if (crypto_hash_setkey(hash, esp->auth.key, esp->auth.key_len))
+ if (crypto_hash_setkey(hash, x->aalg->alg_key,
+ (x->aalg->alg_key_len + 7) / 8))
goto error;
aalg_desc = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
if (!esp->auth.work_icv)
goto error;
}
- esp->conf.key = x->ealg->alg_key;
- esp->conf.key_len = (x->ealg->alg_key_len+7)/8;
tfm = crypto_alloc_blkcipher(x->ealg->alg_name, 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm))
goto error;
goto error;
esp->conf.ivinitted = 0;
}
- if (crypto_blkcipher_setkey(tfm, esp->conf.key, esp->conf.key_len))
+ if (crypto_blkcipher_setkey(tfm, x->ealg->alg_key,
+ (x->ealg->alg_key_len + 7) / 8))
goto error;
x->props.header_len = sizeof(struct ipv6_esp_hdr) + esp->conf.ivlen;
if (x->props.mode == XFRM_MODE_TUNNEL)
.description = "ESP6",
.owner = THIS_MODULE,
.proto = IPPROTO_ESP,
+ .flags = XFRM_TYPE_REPLAY_PROT,
.init_state = esp6_init_state,
.destructor = esp6_destroy,
- .get_max_size = esp6_get_max_size,
+ .get_mtu = esp6_get_mtu,
.input = esp6_input,
.output = esp6_output,
.hdr_offset = xfrm6_find_1stfragopt,
module_exit(esp6_fini);
MODULE_LICENSE("GPL");
+MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_ESP);