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ESP: Export esp_output_fill_trailer function 

The esp fill trailer method is identical for both
IPv6 and IPv4.

Share the implementation for esp6 and esp to avoid
code duplication in addition it could be also used
at various drivers code.

Signed-off-by: Raed Salem <raeds@mellanox.com>
Reviewed-by: Boris Pismenny <borisp@mellanox.com>
Reviewed-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Raed Salem 2020-02-19 14:49:57 +02:00 committed by Steffen Klassert
parent a4c278d1be
commit dda520c4d4
3 changed files with 16 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
include/net/esp.h
View File

@ -11,6 +11,22 @@ static inline struct ip_esp_hdr *ip_esp_hdr(const struct sk_buff *skb)
return (struct ip_esp_hdr *)skb_transport_header(skb);
}
static inline void esp_output_fill_trailer(u8 *tail, int tfclen, int plen, __u8 proto)
{
/* Fill padding... */
if (tfclen) {
memset(tail, 0, tfclen);
tail += tfclen;
}
do {
int i;
for (i = 0; i < plen - 2; i++)
tail[i] = i + 1;
} while (0);
tail[plen - 2] = plen - 2;
tail[plen - 1] = proto;
}
struct esp_info {
struct ip_esp_hdr *esph;
__be64 seqno;

16
net/ipv4/esp4.c
View File

@ -341,22 +341,6 @@ static void esp_output_done_esn(struct crypto_async_request *base, int err)
esp_output_done(base, err);
}
static void esp_output_fill_trailer(u8 *tail, int tfclen, int plen, __u8 proto)
{
/* Fill padding... */
if (tfclen) {
memset(tail, 0, tfclen);
tail += tfclen;
}
do {
int i;
for (i = 0; i < plen - 2; i++)
tail[i] = i + 1;
} while (0);
tail[plen - 2] = plen - 2;
tail[plen - 1] = proto;
}
static struct ip_esp_hdr *esp_output_udp_encap(struct sk_buff *skb,
int encap_type,
struct esp_info *esp,

16
net/ipv6/esp6.c
View File

@ -207,22 +207,6 @@ static void esp_output_done_esn(struct crypto_async_request *base, int err)
esp_output_done(base, err);
}
static void esp_output_fill_trailer(u8 *tail, int tfclen, int plen, __u8 proto)
{
/* Fill padding... */
if (tfclen) {
memset(tail, 0, tfclen);
tail += tfclen;
}
do {
int i;
for (i = 0; i < plen - 2; i++)
tail[i] = i + 1;
} while (0);
tail[plen - 2] = plen - 2;
tail[plen - 1] = proto;
}
int esp6_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp)
{
u8 *tail;