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
  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 */