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xfrm: Use separate low and high order bits of the sequence numbers in xfrm_skb_cb 

To support IPsec extended sequence numbers, we split the
output sequence numbers of xfrm_skb_cb in low and high order 32 bits
and we add the high order 32 bits to the input sequence numbers.
All users are updated accordingly.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Steffen Klassert 2011-03-08 00:06:31 +00:00 committed by David S. Miller
parent 9736acf395
commit 1ce3644ade
7 changed files with 17 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
include/net/xfrm.h
View File

@ -582,8 +582,14 @@ struct xfrm_skb_cb {
/* Sequence number for replay protection. */
union {
u64 output;
__be32 input;
struct {
__u32 low;
__u32 hi;
} output;
struct {
__be32 low;
__be32 hi;
} input;
} seq;
};

2
net/ipv4/ah4.c
View File

@ -208,7 +208,7 @@ static int ah_output(struct xfrm_state *x, struct sk_buff *skb)
ah->reserved = 0;
ah->spi = x->id.spi;
ah->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output);
ah->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output.low);
sg_init_table(sg, nfrags);
skb_to_sgvec(skb, sg, 0, skb->len);

4
net/ipv4/esp4.c
View File

@ -215,7 +215,7 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
}
esph->spi = x->id.spi;
esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output);
esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output.low);
sg_init_table(sg, nfrags);
skb_to_sgvec(skb, sg,
@ -227,7 +227,7 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
aead_givcrypt_set_crypt(req, sg, sg, clen, iv);
aead_givcrypt_set_assoc(req, asg, sizeof(*esph));
aead_givcrypt_set_giv(req, esph->enc_data,
XFRM_SKB_CB(skb)->seq.output);
XFRM_SKB_CB(skb)->seq.output.low);
ESP_SKB_CB(skb)->tmp = tmp;
err = crypto_aead_givencrypt(req);

2
net/ipv6/ah6.c
View File

@ -409,7 +409,7 @@ static int ah6_output(struct xfrm_state *x, struct sk_buff *skb)
ah->reserved = 0;
ah->spi = x->id.spi;
ah->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output);
ah->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output.low);
sg_init_table(sg, nfrags);
skb_to_sgvec(skb, sg, 0, skb->len);

4
net/ipv6/esp6.c
View File

@ -204,7 +204,7 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
*skb_mac_header(skb) = IPPROTO_ESP;
esph->spi = x->id.spi;
esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output);
esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output.low);
sg_init_table(sg, nfrags);
skb_to_sgvec(skb, sg,
@ -216,7 +216,7 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
aead_givcrypt_set_crypt(req, sg, sg, clen, iv);
aead_givcrypt_set_assoc(req, asg, sizeof(*esph));
aead_givcrypt_set_giv(req, esph->enc_data,
XFRM_SKB_CB(skb)->seq.output);
XFRM_SKB_CB(skb)->seq.output.low);
ESP_SKB_CB(skb)->tmp = tmp;
err = crypto_aead_givencrypt(req);

4
net/xfrm/xfrm_input.c
View File

@ -118,7 +118,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
if (encap_type < 0) {
async = 1;
x = xfrm_input_state(skb);
seq = XFRM_SKB_CB(skb)->seq.input;
seq = XFRM_SKB_CB(skb)->seq.input.low;
goto resume;
}
@ -184,7 +184,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
spin_unlock(&x->lock);
XFRM_SKB_CB(skb)->seq.input = seq;
XFRM_SKB_CB(skb)->seq.input.low = seq;
nexthdr = x->type->input(x, skb);

2
net/xfrm/xfrm_output.c
View File

@ -68,7 +68,7 @@ static int xfrm_output_one(struct sk_buff *skb, int err)
}
if (x->type->flags & XFRM_TYPE_REPLAY_PROT) {
XFRM_SKB_CB(skb)->seq.output = ++x->replay.oseq;
XFRM_SKB_CB(skb)->seq.output.low = ++x->replay.oseq;
if (unlikely(x->replay.oseq == 0)) {
XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATESEQERROR);
x->replay.oseq--;