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wireguard: queueing: make use of ip_tunnel_parse_protocol 

Now that wg_examine_packet_protocol has been added for general
consumption as ip_tunnel_parse_protocol, it's possible to remove
wg_examine_packet_protocol and simply use the new
ip_tunnel_parse_protocol function directly.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jason A. Donenfeld 2020-06-29 19:06:21 -06:00 committed by David S. Miller
parent 01a4967c71
commit 1a574074ae
2 changed files with 3 additions and 18 deletions
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19
drivers/net/wireguard/queueing.h
View File

@ -11,6 +11,7 @@
#include <linux/skbuff.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <net/ip_tunnels.h>
struct wg_device;
struct wg_peer;
@ -65,25 +66,9 @@ struct packet_cb {
#define PACKET_CB(skb) ((struct packet_cb *)((skb)->cb))
#define PACKET_PEER(skb) (PACKET_CB(skb)->keypair->entry.peer)
/* Returns either the correct skb->protocol value, or 0 if invalid. */
static inline __be16 wg_examine_packet_protocol(struct sk_buff *skb)
{
if (skb_network_header(skb) >= skb->head &&
(skb_network_header(skb) + sizeof(struct iphdr)) <=
skb_tail_pointer(skb) &&
ip_hdr(skb)->version == 4)
return htons(ETH_P_IP);
if (skb_network_header(skb) >= skb->head &&
(skb_network_header(skb) + sizeof(struct ipv6hdr)) <=
skb_tail_pointer(skb) &&
ipv6_hdr(skb)->version == 6)
return htons(ETH_P_IPV6);
return 0;
}
static inline bool wg_check_packet_protocol(struct sk_buff *skb)
{
__be16 real_protocol = wg_examine_packet_protocol(skb);
__be16 real_protocol = ip_tunnel_parse_protocol(skb);
return real_protocol && skb->protocol == real_protocol;
}

2
drivers/net/wireguard/receive.c
View File

@ -387,7 +387,7 @@ static void wg_packet_consume_data_done(struct wg_peer *peer,
*/
skb->ip_summed = CHECKSUM_UNNECESSARY;
skb->csum_level = ~0; /* All levels */
skb->protocol = wg_examine_packet_protocol(skb);
skb->protocol = ip_tunnel_parse_protocol(skb);
if (skb->protocol == htons(ETH_P_IP)) {
len = ntohs(ip_hdr(skb)->tot_len);
if (unlikely(len < sizeof(struct iphdr)))