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 
66 	__NFQA_MAX
67 };
68 #define NFQA_MAX (__NFQA_MAX - 1)
69 
70 struct nfqnl_msg_verdict_hdr {
71 	__be32 verdict;
72 	__be32 id;
73 };
74 
75 
76 enum nfqnl_msg_config_cmds {
77 	NFQNL_CFG_CMD_NONE,
78 	NFQNL_CFG_CMD_BIND,
79 	NFQNL_CFG_CMD_UNBIND,
80 	NFQNL_CFG_CMD_PF_BIND,
81 	NFQNL_CFG_CMD_PF_UNBIND,
82 };
83 
84 struct nfqnl_msg_config_cmd {
85 	__u8	command;	/* nfqnl_msg_config_cmds */
86 	__u8	_pad;
87 	__be16		pf;		/* AF_xxx for PF_[UN]BIND */
88 };
89 
90 enum nfqnl_config_mode {
91 	NFQNL_COPY_NONE,
92 	NFQNL_COPY_META,
93 	NFQNL_COPY_PACKET,
94 };
95 
96 struct nfqnl_msg_config_params {
97 	__be32		copy_range;
98 	__u8	copy_mode;	/* enum nfqnl_config_mode */
99 } __attribute__ ((packed));
100 
101 
102 enum nfqnl_attr_config {
103 	NFQA_CFG_UNSPEC,
104 	NFQA_CFG_CMD,			/* nfqnl_msg_config_cmd */
105 	NFQA_CFG_PARAMS,		/* nfqnl_msg_config_params */
106 	NFQA_CFG_QUEUE_MAXLEN,		/* __u32 */
107 	NFQA_CFG_MASK,			/* identify which flags to change */
108 	NFQA_CFG_FLAGS,			/* value of these flags (__u32) */
109 	__NFQA_CFG_MAX
110 };
111 #define NFQA_CFG_MAX (__NFQA_CFG_MAX-1)
112 
113 /* Flags for NFQA_CFG_FLAGS */
114 #define NFQA_CFG_F_FAIL_OPEN			(1 << 0)
115 #define NFQA_CFG_F_CONNTRACK			(1 << 1)
116 #define NFQA_CFG_F_GSO				(1 << 2)
117 #define NFQA_CFG_F_UID_GID			(1 << 3)
118 #define NFQA_CFG_F_SECCTX			(1 << 4)
119 #define NFQA_CFG_F_MAX				(1 << 5)
120 
121 /* flags for NFQA_SKB_INFO */
122 /* packet appears to have wrong checksums, but they are ok */
123 #define NFQA_SKB_CSUMNOTREADY (1 << 0)
124 /* packet is GSO (i.e., exceeds device mtu) */
125 #define NFQA_SKB_GSO (1 << 1)
126 /* csum not validated (incoming device doesn't support hw checksum, etc.) */
127 #define NFQA_SKB_CSUM_NOTVERIFIED (1 << 2)
128 
129 #endif /* _NFNETLINK_QUEUE_H */
130