diff options
| -rw-r--r-- | include/uapi/linux/netfilter/nfnetlink_log.h | 11 | ||||
| -rw-r--r-- | net/netfilter/nfnetlink_log.c | 57 |
2 files changed, 68 insertions, 0 deletions
diff --git a/include/uapi/linux/netfilter/nfnetlink_log.h b/include/uapi/linux/netfilter/nfnetlink_log.h index 20983cb195a0..45c8d3b027e0 100644 --- a/include/uapi/linux/netfilter/nfnetlink_log.h +++ b/include/uapi/linux/netfilter/nfnetlink_log.h @@ -33,6 +33,15 @@ struct nfulnl_msg_packet_timestamp { __aligned_be64 usec; }; +enum nfulnl_vlan_attr { + NFULA_VLAN_UNSPEC, + NFULA_VLAN_PROTO, /* __be16 skb vlan_proto */ + NFULA_VLAN_TCI, /* __be16 skb htons(vlan_tci) */ + __NFULA_VLAN_MAX, +}; + +#define NFULA_VLAN_MAX (__NFULA_VLAN_MAX + 1) + enum nfulnl_attr_type { NFULA_UNSPEC, NFULA_PACKET_HDR, @@ -54,6 +63,8 @@ enum nfulnl_attr_type { NFULA_HWLEN, /* hardware header length */ NFULA_CT, /* nf_conntrack_netlink.h */ NFULA_CT_INFO, /* enum ip_conntrack_info */ + NFULA_VLAN, /* nested attribute: packet vlan info */ + NFULA_L2HDR, /* full L2 header */ __NFULA_MAX }; diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c index d69e1863e536..0ba020ca38e6 100644 --- a/net/netfilter/nfnetlink_log.c +++ b/net/netfilter/nfnetlink_log.c @@ -385,6 +385,57 @@ nfulnl_timer(struct timer_list *t) instance_put(inst); } +static u32 nfulnl_get_bridge_size(const struct sk_buff *skb) +{ + u32 size = 0; + + if (!skb_mac_header_was_set(skb)) + return 0; + + if (skb_vlan_tag_present(skb)) { + size += nla_total_size(0); /* nested */ + size += nla_total_size(sizeof(u16)); /* id */ + size += nla_total_size(sizeof(u16)); /* tag */ + } + + if (skb->network_header > skb->mac_header) + size += nla_total_size(skb->network_header - skb->mac_header); + + return size; +} + +static int nfulnl_put_bridge(struct nfulnl_instance *inst, const struct sk_buff *skb) +{ + if (!skb_mac_header_was_set(skb)) + return 0; + + if (skb_vlan_tag_present(skb)) { + struct nlattr *nest; + + nest = nla_nest_start(inst->skb, NFULA_VLAN); + if (!nest) + goto nla_put_failure; + + if (nla_put_be16(inst->skb, NFULA_VLAN_TCI, htons(skb->vlan_tci)) || + nla_put_be16(inst->skb, NFULA_VLAN_PROTO, skb->vlan_proto)) + goto nla_put_failure; + + nla_nest_end(inst->skb, nest); + } + + if (skb->mac_header < skb->network_header) { + int len = (int)(skb->network_header - skb->mac_header); + + if (nla_put(inst->skb, NFULA_L2HDR, len, skb_mac_header(skb))) + goto nla_put_failure; + } + + return 0; + +nla_put_failure: + return -1; +} + /* This is an inline function, we don't really care about a long * list of arguments */ static inline int @@ -580,6 +631,10 @@ __build_packet_message(struct nfnl_log_net *log, NFULA_CT, NFULA_CT_INFO) < 0) goto nla_put_failure; + if ((pf == NFPROTO_NETDEV || pf == NFPROTO_BRIDGE) && + nfulnl_put_bridge(inst, skb) < 0) + goto nla_put_failure; + if (data_len) { struct nlattr *nla; int size = nla_attr_size(data_len); @@ -687,6 +742,8 @@ nfulnl_log_packet(struct net *net, size += nfnl_ct->build_size(ct); } } + if (pf == NFPROTO_NETDEV || pf == NFPROTO_BRIDGE) + size += nfulnl_get_bridge_size(skb); qthreshold = inst->qthreshold; /* per-rule qthreshold overrides per-instance */ |