summaryrefslogtreecommitdiff
path: root/net/ipv4/ipip.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/ipv4/ipip.c')
-rw-r--r--net/ipv4/ipip.c42
1 files changed, 25 insertions, 17 deletions
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index 618bde867ac1..e15b45297c09 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -120,6 +120,10 @@
#define HASH_SIZE 16
#define HASH(addr) (((__force u32)addr^((__force u32)addr>>4))&0xF)
+static bool log_ecn_error = true;
+module_param(log_ecn_error, bool, 0644);
+MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
+
static int ipip_net_id __read_mostly;
struct ipip_net {
struct ip_tunnel __rcu *tunnels_r_l[HASH_SIZE];
@@ -400,28 +404,18 @@ out:
return err;
}
-static inline void ipip_ecn_decapsulate(const struct iphdr *outer_iph,
- struct sk_buff *skb)
-{
- struct iphdr *inner_iph = ip_hdr(skb);
-
- if (INET_ECN_is_ce(outer_iph->tos))
- IP_ECN_set_ce(inner_iph);
-}
-
static int ipip_rcv(struct sk_buff *skb)
{
struct ip_tunnel *tunnel;
const struct iphdr *iph = ip_hdr(skb);
+ int err;
tunnel = ipip_tunnel_lookup(dev_net(skb->dev), iph->saddr, iph->daddr);
if (tunnel != NULL) {
struct pcpu_tstats *tstats;
- if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) {
- kfree_skb(skb);
- return 0;
- }
+ if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb))
+ goto drop;
secpath_reset(skb);
@@ -430,21 +424,35 @@ static int ipip_rcv(struct sk_buff *skb)
skb->protocol = htons(ETH_P_IP);
skb->pkt_type = PACKET_HOST;
+ __skb_tunnel_rx(skb, tunnel->dev);
+
+ err = IP_ECN_decapsulate(iph, skb);
+ if (unlikely(err)) {
+ if (log_ecn_error)
+ net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
+ &iph->saddr, iph->tos);
+ if (err > 1) {
+ ++tunnel->dev->stats.rx_frame_errors;
+ ++tunnel->dev->stats.rx_errors;
+ goto drop;
+ }
+ }
+
tstats = this_cpu_ptr(tunnel->dev->tstats);
u64_stats_update_begin(&tstats->syncp);
tstats->rx_packets++;
tstats->rx_bytes += skb->len;
u64_stats_update_end(&tstats->syncp);
- __skb_tunnel_rx(skb, tunnel->dev);
-
- ipip_ecn_decapsulate(iph, skb);
-
netif_rx(skb);
return 0;
}
return -1;
+
+drop:
+ kfree_skb(skb);
+ return 0;
}
/*