| 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
|---|
| 2 | #ifndef _NFNETLINK_COMPAT_H |
|---|
| 3 | #define _NFNETLINK_COMPAT_H |
|---|
| 4 | |
|---|
| 5 | #include <linux/types.h> |
|---|
| 6 | |
|---|
| 7 | #ifndef __KERNEL__ |
|---|
| 8 | /* Old nfnetlink macros for userspace */ |
|---|
| 9 | |
|---|
| 10 | /* nfnetlink groups: Up to 32 maximum */ |
|---|
| 11 | #define NF_NETLINK_CONNTRACK_NEW 0x00000001 |
|---|
| 12 | #define NF_NETLINK_CONNTRACK_UPDATE 0x00000002 |
|---|
| 13 | #define NF_NETLINK_CONNTRACK_DESTROY 0x00000004 |
|---|
| 14 | #define NF_NETLINK_CONNTRACK_EXP_NEW 0x00000008 |
|---|
| 15 | #define NF_NETLINK_CONNTRACK_EXP_UPDATE 0x00000010 |
|---|
| 16 | #define NF_NETLINK_CONNTRACK_EXP_DESTROY 0x00000020 |
|---|
| 17 | |
|---|
| 18 | /* Generic structure for encapsulation optional netfilter information. |
|---|
| 19 | * It is reminiscent of sockaddr, but with sa_family replaced |
|---|
| 20 | * with attribute type. |
|---|
| 21 | * ! This should someday be put somewhere generic as now rtnetlink and |
|---|
| 22 | * ! nfnetlink use the same attributes methods. - J. Schulist. |
|---|
| 23 | */ |
|---|
| 24 | |
|---|
| 25 | struct nfattr { |
|---|
| 26 | __u16 nfa_len; |
|---|
| 27 | __u16 nfa_type; /* we use 15 bits for the type, and the highest |
|---|
| 28 | * bit to indicate whether the payload is nested */ |
|---|
| 29 | }; |
|---|
| 30 | |
|---|
| 31 | /* FIXME: Apart from NFNL_NFA_NESTED shamelessly copy and pasted from |
|---|
| 32 | * rtnetlink.h, it's time to put this in a generic file */ |
|---|
| 33 | |
|---|
| 34 | #define NFNL_NFA_NEST 0x8000 |
|---|
| 35 | #define NFA_TYPE(attr) ((attr)->nfa_type & 0x7fff) |
|---|
| 36 | |
|---|
| 37 | #define NFA_ALIGNTO 4 |
|---|
| 38 | #define NFA_ALIGN(len) (((len) + NFA_ALIGNTO - 1) & ~(NFA_ALIGNTO - 1)) |
|---|
| 39 | #define NFA_OK(nfa,len) ((len) > 0 && (nfa)->nfa_len >= sizeof(struct nfattr) \ |
|---|
| 40 | && (nfa)->nfa_len <= (len)) |
|---|
| 41 | #define NFA_NEXT(nfa,attrlen) ((attrlen) -= NFA_ALIGN((nfa)->nfa_len), \ |
|---|
| 42 | (struct nfattr *)(((char *)(nfa)) + NFA_ALIGN((nfa)->nfa_len))) |
|---|
| 43 | #define NFA_LENGTH(len) (NFA_ALIGN(sizeof(struct nfattr)) + (len)) |
|---|
| 44 | #define NFA_SPACE(len) NFA_ALIGN(NFA_LENGTH(len)) |
|---|
| 45 | #define NFA_DATA(nfa) ((void *)(((char *)(nfa)) + NFA_LENGTH(0))) |
|---|
| 46 | #define NFA_PAYLOAD(nfa) ((int)((nfa)->nfa_len) - NFA_LENGTH(0)) |
|---|
| 47 | #define NFA_NEST(skb, type) \ |
|---|
| 48 | ({ struct nfattr *__start = (struct nfattr *)skb_tail_pointer(skb); \ |
|---|
| 49 | NFA_PUT(skb, (NFNL_NFA_NEST | type), 0, NULL); \ |
|---|
| 50 | __start; }) |
|---|
| 51 | #define NFA_NEST_END(skb, start) \ |
|---|
| 52 | ({ (start)->nfa_len = skb_tail_pointer(skb) - (unsigned char *)(start); \ |
|---|
| 53 | (skb)->len; }) |
|---|
| 54 | #define NFA_NEST_CANCEL(skb, start) \ |
|---|
| 55 | ({ if (start) \ |
|---|
| 56 | skb_trim(skb, (unsigned char *) (start) - (skb)->data); \ |
|---|
| 57 | -1; }) |
|---|
| 58 | |
|---|
| 59 | #define NFM_NFA(n) ((struct nfattr *)(((char *)(n)) \ |
|---|
| 60 | + NLMSG_ALIGN(sizeof(struct nfgenmsg)))) |
|---|
| 61 | #define NFM_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct nfgenmsg)) |
|---|
| 62 | |
|---|
| 63 | #endif /* ! __KERNEL__ */ |
|---|
| 64 | #endif /* _NFNETLINK_COMPAT_H */ |
|---|
| 65 | |
|---|
