Preview: nfnetlink_queue.h
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//usr/include/linux/netfilter/nfnetlink_queue.h
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _NFNETLINK_QUEUE_H
#define _NFNETLINK_QUEUE_H
#include <linux/types.h>
#include <linux/netfilter/nfnetlink.h>
enum nfqnl_msg_types {
NFQNL_MSG_PACKET, /* packet from kernel to userspace */
NFQNL_MSG_VERDICT, /* verdict from userspace to kernel */
NFQNL_MSG_CONFIG, /* connect to a particular queue */
NFQNL_MSG_VERDICT_BATCH, /* batchv from userspace to kernel */
NFQNL_MSG_MAX
};
struct nfqnl_msg_packet_hdr {
__be32 packet_id; /* unique ID of packet in queue */
__be16 hw_protocol; /* hw protocol (network order) */
__u8 hook; /* netfilter hook */
} __attribute__ ((packed));
struct nfqnl_msg_packet_hw {
__be16 hw_addrlen;
__u16 _pad;
__u8 hw_addr[8];
};
struct nfqnl_msg_packet_timestamp {
__aligned_be64 sec;
__aligned_be64 usec;
};
enum nfqnl_vlan_attr {
NFQA_VLAN_UNSPEC,
NFQA_VLAN_PROTO, /* __be16 skb vlan_proto */
NFQA_VLAN_TCI, /* __be16 skb htons(vlan_tci) */
__NFQA_VLAN_MAX,
};
#define NFQA_VLAN_MAX (__NFQA_VLAN_MAX - 1)
enum nfqnl_attr_type {
NFQA_UNSPEC,
NFQA_PACKET_HDR,
NFQA_VERDICT_HDR, /* nfqnl_msg_verdict_hrd */
NFQA_MARK, /* __u32 nfmark */
NFQA_TIMESTAMP, /* nfqnl_msg_packet_timestamp */
NFQA_IFINDEX_INDEV, /* __u32 ifindex */
NFQA_IFINDEX_OUTDEV, /* __u32 ifindex */
NFQA_IFINDEX_PHYSINDEV, /* __u32 ifindex */
NFQA_IFINDEX_PHYSOUTDEV, /* __u32 ifindex */
NFQA_HWADDR, /* nfqnl_msg_packet_hw */
NFQA_PAYLOAD, /* opaque data payload */
NFQA_CT, /* nfnetlink_conntrack.h */
NFQA_CT_INFO, /* enum ip_conntrack_info */
NFQA_CAP_LEN, /* __u32 length of captured packet */
NFQA_SKB_INFO, /* __u32 skb meta information */
NFQA_EXP, /* nfnetlink_conntrack.h */
NFQA_UID, /* __u32 sk uid */
NFQA_GID, /* __u32 sk gid */
NFQA_SECCTX, /* security context string */
NFQA_VLAN, /* nested attribute: packet vlan info */
NFQA_L2HDR, /* full L2 header */
NFQA_PRIORITY, /* skb->priority */
NFQA_CGROUP_CLASSID, /* __u32 cgroup classid */
__NFQA_MAX
};
#define NFQA_MAX (__NFQA_MAX - 1)
struct nfqnl_msg_verdict_hdr {
__be32 verdict;
__be32 id;
};
enum nfqnl_msg_config_cmds {
NFQNL_CFG_CMD_NONE,
NFQNL_CFG_CMD_BIND,
NFQNL_CFG_CMD_UNBIND,
NFQNL_CFG_CMD_PF_BIND,
NFQNL_CFG_CMD_PF_UNBIND,
};
struct nfqnl_msg_config_cmd {
__u8 command; /* nfqnl_msg_config_cmds */
__u8 _pad;
__be16 pf; /* AF_xxx for PF_[UN]BIND */
};
enum nfqnl_config_mode {
NFQNL_COPY_NONE,
NFQNL_COPY_META,
NFQNL_COPY_PACKET,
};
struct nfqnl_msg_config_params {
__be32 copy_range;
__u8 copy_mode; /* enum nfqnl_config_mode */
} __attribute__ ((packed));
enum nfqnl_attr_config {
NFQA_CFG_UNSPEC,
NFQA_CFG_CMD, /* nfqnl_msg_config_cmd */
NFQA_CFG_PARAMS, /* nfqnl_msg_config_params */
NFQA_CFG_QUEUE_MAXLEN, /* __u32 */
NFQA_CFG_MASK, /* identify which flags to change */
NFQA_CFG_FLAGS, /* value of these flags (__u32) */
__NFQA_CFG_MAX
};
#define NFQA_CFG_MAX (__NFQA_CFG_MAX-1)
/* Flags for NFQA_CFG_FLAGS */
#define NFQA_CFG_F_FAIL_OPEN (1 << 0)
#define NFQA_CFG_F_CONNTRACK (1 << 1)
#define NFQA_CFG_F_GSO (1 << 2)
#define NFQA_CFG_F_UID_GID (1 << 3)
#define NFQA_CFG_F_SECCTX (1 << 4)
#define NFQA_CFG_F_MAX (1 << 5)
/* flags for NFQA_SKB_INFO */
/* packet appears to have wrong checksums, but they are ok */
#define NFQA_SKB_CSUMNOTREADY (1 << 0)
/* packet is GSO (i.e., exceeds device mtu) */
#define NFQA_SKB_GSO (1 << 1)
/* csum not validated (incoming device doesn't support hw checksum, etc.) */
#define NFQA_SKB_CSUM_NOTVERIFIED (1 << 2)
#endif /* _NFNETLINK_QUEUE_H */
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