[PARISC] Update defconfigs

[sfrench/cifs-2.6.git] / net / ipv6 / esp6.c

diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index 2db31ce3c7e61302dc66ad12054f009898547e47..9eb92859835171ec22709c04148ce9860ea2acbe 100644 (file)
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -34,6 +34,7 @@
 #include <linux/kernel.h>
 #include <linux/pfkeyv2.h>
 #include <linux/random.h>
+#include <linux/spinlock.h>
 #include <net/icmp.h>
 #include <net/ipv6.h>
 #include <net/protocol.h>
@@ -42,8 +43,7 @@
 static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
 {
        int err;
-       struct ipv6hdr *top_iph;
-       struct ipv6_esp_hdr *esph;
+       struct ip_esp_hdr *esph;
        struct crypto_blkcipher *tfm;
        struct blkcipher_desc desc;
        struct sk_buff *trailer;
@@ -53,13 +53,8 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
        int nfrags;
        u8 *tail;
        struct esp_data *esp = x->data;
-       int hdr_len = (skb_transport_offset(skb) +
-                      sizeof(*esph) + esp->conf.ivlen);
 
-       /* Strip IP+ESP header. */
-       __skb_pull(skb, hdr_len);
-
-       /* Now skb is pure payload to encrypt */
+       /* skb is pure payload to encrypt */
        err = -ENOMEM;
 
        /* Round to block size */
@@ -88,15 +83,15 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
        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_transport_header(skb);
-       top_iph->payload_len = htons(skb->len + alen - sizeof(*top_iph));
-       *(skb_tail_pointer(trailer) - 1) = *skb_network_header(skb);
-       *skb_network_header(skb) = IPPROTO_ESP;
+       skb_push(skb, -skb_network_offset(skb));
+       esph = ip_esp_hdr(skb);
+       *(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);
+
+       spin_lock_bh(&x->lock);
 
        if (esp->conf.ivlen) {
                if (unlikely(!esp->conf.ivinitted)) {
@@ -112,7 +107,7 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
                if (unlikely(nfrags > ESP_NUM_FAST_SG)) {
                        sg = kmalloc(sizeof(struct scatterlist)*nfrags, GFP_ATOMIC);
                        if (!sg)
-                               goto error;
+                               goto unlock;
                }
                skb_to_sgvec(skb, sg, esph->enc_data+esp->conf.ivlen-skb->data, clen);
                err = crypto_blkcipher_encrypt(&desc, sg, sg, clen);
@@ -121,7 +116,7 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
        } while (0);
 
        if (unlikely(err))
-               goto error;
+               goto unlock;
 
        if (esp->conf.ivlen) {
                memcpy(esph->enc_data, esp->conf.ivec, esp->conf.ivlen);
@@ -134,6 +129,9 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
                memcpy(pskb_put(skb, trailer, alen), esp->auth.work_icv, alen);
        }
 
+unlock:
+       spin_unlock_bh(&x->lock);
+
 error:
        return err;
 }
@@ -141,19 +139,19 @@ error:
 static int esp6_input(struct xfrm_state *x, struct sk_buff *skb)
 {
        struct ipv6hdr *iph;
-       struct ipv6_esp_hdr *esph;
+       struct ip_esp_hdr *esph;
        struct esp_data *esp = x->data;
        struct crypto_blkcipher *tfm = esp->conf.tfm;
        struct blkcipher_desc desc = { .tfm = tfm };
        struct sk_buff *trailer;
        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 elen = skb->len - sizeof(*esph) - esp->conf.ivlen - alen;
        int hdr_len = skb_network_header_len(skb);
        int nfrags;
        int ret = 0;
 
-       if (!pskb_may_pull(skb, sizeof(struct ipv6_esp_hdr))) {
+       if (!pskb_may_pull(skb, sizeof(*esph))) {
                ret = -EINVAL;
                goto out;
        }
@@ -188,7 +186,7 @@ static int esp6_input(struct xfrm_state *x, struct sk_buff *skb)
 
        skb->ip_summed = CHECKSUM_NONE;
 
-       esph = (struct ipv6_esp_hdr*)skb->data;
+       esph = (struct ip_esp_hdr *)skb->data;
        iph = ipv6_hdr(skb);
 
        /* Get ivec. This can be wrong, check against another impls. */
@@ -207,7 +205,7 @@ static int esp6_input(struct xfrm_state *x, struct sk_buff *skb)
                                goto out;
                        }
                }
-               skb_to_sgvec(skb, sg, sizeof(struct ipv6_esp_hdr) + esp->conf.ivlen, elen);
+               skb_to_sgvec(skb, sg, sizeof(*esph) + esp->conf.ivlen, elen);
                ret = crypto_blkcipher_decrypt(&desc, sg, sg, elen);
                if (unlikely(sg != &esp->sgbuf[0]))
                        kfree(sg);
@@ -259,7 +257,7 @@ static void esp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
                     int type, int code, int offset, __be32 info)
 {
        struct ipv6hdr *iph = (struct ipv6hdr*)skb->data;
-       struct ipv6_esp_hdr *esph = (struct ipv6_esp_hdr*)(skb->data+offset);
+       struct ip_esp_hdr *esph = (struct ip_esp_hdr *)(skb->data + offset);
        struct xfrm_state *x;
 
        if (type != ICMPV6_DEST_UNREACH &&
@@ -297,11 +295,6 @@ static int esp6_init_state(struct xfrm_state *x)
        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;
 
@@ -316,15 +309,14 @@ static int esp6_init_state(struct xfrm_state *x)
                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);
@@ -346,8 +338,6 @@ static int esp6_init_state(struct xfrm_state *x)
                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;
@@ -360,9 +350,10 @@ static int esp6_init_state(struct xfrm_state *x)
                        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;
+       x->props.header_len = sizeof(struct ip_esp_hdr) + esp->conf.ivlen;
        if (x->props.mode == XFRM_MODE_TUNNEL)
                x->props.header_len += sizeof(struct ipv6hdr);
        x->data = esp;
@@ -380,6 +371,7 @@ static struct xfrm_type esp6_type =
        .description    = "ESP6",
        .owner          = THIS_MODULE,
        .proto          = IPPROTO_ESP,
+       .flags          = XFRM_TYPE_REPLAY_PROT,
        .init_state     = esp6_init_state,
        .destructor     = esp6_destroy,
        .get_mtu        = esp6_get_mtu,