diff options
| -rw-r--r-- | include/net/ip_tunnels.h | 1 | ||||
| -rw-r--r-- | net/ipv4/gre_demux.c | 5 | ||||
| -rw-r--r-- | net/ipv4/ip_gre.c | 48 |
3 files changed, 37 insertions, 17 deletions
diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h index 6d790910ebdf..d916b4315903 100644 --- a/include/net/ip_tunnels.h +++ b/include/net/ip_tunnels.h @@ -160,6 +160,7 @@ struct tnl_ptk_info { #define PACKET_RCVD 0 #define PACKET_REJECT 1 +#define PACKET_NEXT 2 #define IP_TNL_HASH_BITS 7 #define IP_TNL_HASH_SIZE (1 << IP_TNL_HASH_BITS) diff --git a/net/ipv4/gre_demux.c b/net/ipv4/gre_demux.c index a41e73ab1369..d78e2eefc0f7 100644 --- a/net/ipv4/gre_demux.c +++ b/net/ipv4/gre_demux.c @@ -114,11 +114,8 @@ int gre_parse_header(struct sk_buff *skb, struct tnl_ptk_info *tpi, */ if (greh->flags == 0 && tpi->proto == htons(ETH_P_WCCP)) { tpi->proto = htons(ETH_P_IP); - if ((*(u8 *)options & 0xF0) != 0x40) { + if ((*(u8 *)options & 0xF0) != 0x40) hdr_len += 4; - if (!pskb_may_pull(skb, hdr_len)) - return -EINVAL; - } } return hdr_len; } diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index 8260a707b9b8..2b267e71ebf5 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -260,24 +260,22 @@ static __be32 tunnel_id_to_key(__be64 x) #endif } -static int ipgre_rcv(struct sk_buff *skb, const struct tnl_ptk_info *tpi) +static int __ipgre_rcv(struct sk_buff *skb, const struct tnl_ptk_info *tpi, + struct ip_tunnel_net *itn, int hdr_len, bool raw_proto) { - struct net *net = dev_net(skb->dev); struct metadata_dst *tun_dst = NULL; - struct ip_tunnel_net *itn; const struct iphdr *iph; struct ip_tunnel *tunnel; - if (tpi->proto == htons(ETH_P_TEB)) - itn = net_generic(net, gre_tap_net_id); - else - itn = net_generic(net, ipgre_net_id); - iph = ip_hdr(skb); tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, tpi->flags, iph->saddr, iph->daddr, tpi->key); if (tunnel) { + if (__iptunnel_pull_header(skb, hdr_len, tpi->proto, + raw_proto, false) < 0) + goto drop; + skb_pop_mac_header(skb); if (tunnel->collect_md) { __be16 flags; @@ -293,7 +291,34 @@ static int ipgre_rcv(struct sk_buff *skb, const struct tnl_ptk_info *tpi) ip_tunnel_rcv(tunnel, skb, tpi, tun_dst, log_ecn_error); return PACKET_RCVD; } - return PACKET_REJECT; + return PACKET_NEXT; + +drop: + kfree_skb(skb); + return PACKET_RCVD; +} + +static int ipgre_rcv(struct sk_buff *skb, const struct tnl_ptk_info *tpi, + int hdr_len) +{ + struct net *net = dev_net(skb->dev); + struct ip_tunnel_net *itn; + int res; + + if (tpi->proto == htons(ETH_P_TEB)) + itn = net_generic(net, gre_tap_net_id); + else + itn = net_generic(net, ipgre_net_id); + + res = __ipgre_rcv(skb, tpi, itn, hdr_len, false); + if (res == PACKET_NEXT && tpi->proto == htons(ETH_P_TEB)) { + /* ipgre tunnels in collect metadata mode should receive + * also ETH_P_TEB traffic. + */ + itn = net_generic(net, ipgre_net_id); + res = __ipgre_rcv(skb, tpi, itn, hdr_len, true); + } + return res; } static int gre_rcv(struct sk_buff *skb) @@ -314,10 +339,7 @@ static int gre_rcv(struct sk_buff *skb) if (hdr_len < 0) goto drop; - if (iptunnel_pull_header(skb, hdr_len, tpi.proto, false)) - goto drop; - - if (ipgre_rcv(skb, &tpi) == PACKET_RCVD) + if (ipgre_rcv(skb, &tpi, hdr_len) == PACKET_RCVD) return 0; icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0); |