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The C and C++ Include Header Files

/usr/include/linux/netfilter/nfnetlink_queue.h

$ cat -n /usr/include/linux/netfilter/nfnetlink_queue.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef _NFNETLINK_QUEUE_H
     3	#define _NFNETLINK_QUEUE_H
     4	
     5	#include <linux/types.h>
     6	#include <linux/netfilter/nfnetlink.h>
     7	
     8	enum nfqnl_msg_types {
     9		NFQNL_MSG_PACKET,		/* packet from kernel to userspace */
    10		NFQNL_MSG_VERDICT,		/* verdict from userspace to kernel */
    11		NFQNL_MSG_CONFIG,		/* connect to a particular queue */
    12		NFQNL_MSG_VERDICT_BATCH,	/* batchv from userspace to kernel */
    13	
    14		NFQNL_MSG_MAX
    15	};
    16	
    17	struct nfqnl_msg_packet_hdr {
    18		__be32		packet_id;	/* unique ID of packet in queue */
    19		__be16		hw_protocol;	/* hw protocol (network order) */
    20		__u8	hook;		/* netfilter hook */
    21	} __attribute__ ((packed));
    22	
    23	struct nfqnl_msg_packet_hw {
    24		__be16		hw_addrlen;
    25		__u16	_pad;
    26		__u8	hw_addr[8];
    27	};
    28	
    29	struct nfqnl_msg_packet_timestamp {
    30		__aligned_be64	sec;
    31		__aligned_be64	usec;
    32	};
    33	
    34	enum nfqnl_vlan_attr {
    35		NFQA_VLAN_UNSPEC,
    36		NFQA_VLAN_PROTO,		/* __be16 skb vlan_proto */
    37		NFQA_VLAN_TCI,			/* __be16 skb htons(vlan_tci) */
    38		__NFQA_VLAN_MAX,
    39	};
    40	#define NFQA_VLAN_MAX (__NFQA_VLAN_MAX - 1)
    41	
    42	enum nfqnl_attr_type {
    43		NFQA_UNSPEC,
    44		NFQA_PACKET_HDR,
    45		NFQA_VERDICT_HDR,		/* nfqnl_msg_verdict_hrd */
    46		NFQA_MARK,			/* __u32 nfmark */
    47		NFQA_TIMESTAMP,			/* nfqnl_msg_packet_timestamp */
    48		NFQA_IFINDEX_INDEV,		/* __u32 ifindex */
    49		NFQA_IFINDEX_OUTDEV,		/* __u32 ifindex */
    50		NFQA_IFINDEX_PHYSINDEV,		/* __u32 ifindex */
    51		NFQA_IFINDEX_PHYSOUTDEV,	/* __u32 ifindex */
    52		NFQA_HWADDR,			/* nfqnl_msg_packet_hw */
    53		NFQA_PAYLOAD,			/* opaque data payload */
    54		NFQA_CT,			/* nfnetlink_conntrack.h */
    55		NFQA_CT_INFO,			/* enum ip_conntrack_info */
    56		NFQA_CAP_LEN,			/* __u32 length of captured packet */
    57		NFQA_SKB_INFO,			/* __u32 skb meta information */
    58		NFQA_EXP,			/* nfnetlink_conntrack.h */
    59		NFQA_UID,			/* __u32 sk uid */
    60		NFQA_GID,			/* __u32 sk gid */
    61		NFQA_SECCTX,			/* security context string */
    62		NFQA_VLAN,			/* nested attribute: packet vlan info */
    63		NFQA_L2HDR,			/* full L2 header */
    64		NFQA_PRIORITY,			/* skb->priority */
    65		NFQA_CGROUP_CLASSID,		/* __u32 cgroup classid */
    66	
    67		__NFQA_MAX
    68	};
    69	#define NFQA_MAX (__NFQA_MAX - 1)
    70	
    71	struct nfqnl_msg_verdict_hdr {
    72		__be32 verdict;
    73		__be32 id;
    74	};
    75	
    76	
    77	enum nfqnl_msg_config_cmds {
    78		NFQNL_CFG_CMD_NONE,
    79		NFQNL_CFG_CMD_BIND,
    80		NFQNL_CFG_CMD_UNBIND,
    81		NFQNL_CFG_CMD_PF_BIND,
    82		NFQNL_CFG_CMD_PF_UNBIND,
    83	};
    84	
    85	struct nfqnl_msg_config_cmd {
    86		__u8	command;	/* nfqnl_msg_config_cmds */
    87		__u8	_pad;
    88		__be16		pf;		/* AF_xxx for PF_[UN]BIND */
    89	};
    90	
    91	enum nfqnl_config_mode {
    92		NFQNL_COPY_NONE,
    93		NFQNL_COPY_META,
    94		NFQNL_COPY_PACKET,
    95	};
    96	
    97	struct nfqnl_msg_config_params {
    98		__be32		copy_range;
    99		__u8	copy_mode;	/* enum nfqnl_config_mode */
   100	} __attribute__ ((packed));
   101	
   102	
   103	enum nfqnl_attr_config {
   104		NFQA_CFG_UNSPEC,
   105		NFQA_CFG_CMD,			/* nfqnl_msg_config_cmd */
   106		NFQA_CFG_PARAMS,		/* nfqnl_msg_config_params */
   107		NFQA_CFG_QUEUE_MAXLEN,		/* __u32 */
   108		NFQA_CFG_MASK,			/* identify which flags to change */
   109		NFQA_CFG_FLAGS,			/* value of these flags (__u32) */
   110		__NFQA_CFG_MAX
   111	};
   112	#define NFQA_CFG_MAX (__NFQA_CFG_MAX-1)
   113	
   114	/* Flags for NFQA_CFG_FLAGS */
   115	#define NFQA_CFG_F_FAIL_OPEN			(1 << 0)
   116	#define NFQA_CFG_F_CONNTRACK			(1 << 1)
   117	#define NFQA_CFG_F_GSO				(1 << 2)
   118	#define NFQA_CFG_F_UID_GID			(1 << 3)
   119	#define NFQA_CFG_F_SECCTX			(1 << 4)
   120	#define NFQA_CFG_F_MAX				(1 << 5)
   121	
   122	/* flags for NFQA_SKB_INFO */
   123	/* packet appears to have wrong checksums, but they are ok */
   124	#define NFQA_SKB_CSUMNOTREADY (1 << 0)
   125	/* packet is GSO (i.e., exceeds device mtu) */
   126	#define NFQA_SKB_GSO (1 << 1)
   127	/* csum not validated (incoming device doesn't support hw checksum, etc.) */
   128	#define NFQA_SKB_CSUM_NOTVERIFIED (1 << 2)
   129	
   130	#endif /* _NFNETLINK_QUEUE_H */
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