diff options
Diffstat (limited to 'net/ipv6/sit.c')
| -rw-r--r-- | net/ipv6/sit.c | 33 |
1 files changed, 21 insertions, 12 deletions
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c index 80cb3829831c..cfba99b2c2a4 100644 --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -65,6 +65,10 @@ #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 ipip6_tunnel_init(struct net_device *dev); static void ipip6_tunnel_setup(struct net_device *dev); static void ipip6_dev_free(struct net_device *dev); @@ -106,6 +110,7 @@ static struct rtnl_link_stats64 *ipip6_get_stats64(struct net_device *dev, } tot->rx_errors = dev->stats.rx_errors; + tot->rx_frame_errors = dev->stats.rx_frame_errors; tot->tx_fifo_errors = dev->stats.tx_fifo_errors; tot->tx_carrier_errors = dev->stats.tx_carrier_errors; tot->tx_dropped = dev->stats.tx_dropped; @@ -585,16 +590,11 @@ out: return err; } -static inline void ipip6_ecn_decapsulate(const struct iphdr *iph, struct sk_buff *skb) -{ - if (INET_ECN_is_ce(iph->tos)) - IP6_ECN_set_ce(ipv6_hdr(skb)); -} - static int ipip6_rcv(struct sk_buff *skb) { const struct iphdr *iph; struct ip_tunnel *tunnel; + int err; if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) goto out; @@ -616,18 +616,27 @@ static int ipip6_rcv(struct sk_buff *skb) if ((tunnel->dev->priv_flags & IFF_ISATAP) && !isatap_chksrc(skb, iph, tunnel)) { tunnel->dev->stats.rx_errors++; - kfree_skb(skb); - return 0; + goto out; + } + + __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 out; + } } tstats = this_cpu_ptr(tunnel->dev->tstats); tstats->rx_packets++; tstats->rx_bytes += skb->len; - __skb_tunnel_rx(skb, tunnel->dev); - - ipip6_ecn_decapsulate(iph, skb); - netif_rx(skb); return 0; |