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
8enum 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
17struct 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
23struct nfqnl_msg_packet_hw {
24	__be16		hw_addrlen;
25	__u16	_pad;
26	__u8	hw_addr[8];
27};
28
29struct nfqnl_msg_packet_timestamp {
30	__aligned_be64	sec;
31	__aligned_be64	usec;
32};
33
34enum 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
42enum 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
71struct nfqnl_msg_verdict_hdr {
72	__be32 verdict;
73	__be32 id;
74};
75
76
77enum 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
85struct 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
91enum nfqnl_config_mode {
92	NFQNL_COPY_NONE,
93	NFQNL_COPY_META,
94	NFQNL_COPY_PACKET,
95};
96
97struct nfqnl_msg_config_params {
98	__be32		copy_range;
99	__u8	copy_mode;	/* enum nfqnl_config_mode */
100} __attribute__ ((packed));
101
102
103enum 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 */
131