| #ifndef _NFNETLINK_COMPAT_H |
| #define _NFNETLINK_COMPAT_H |
| |
| #include <linux/types.h> |
| |
| /* Old nfnetlink macros for userspace */ |
| |
| /* nfnetlink groups: Up to 32 maximum */ |
| #define NF_NETLINK_CONNTRACK_NEW 0x00000001 |
| #define NF_NETLINK_CONNTRACK_UPDATE 0x00000002 |
| #define NF_NETLINK_CONNTRACK_DESTROY 0x00000004 |
| #define NF_NETLINK_CONNTRACK_EXP_NEW 0x00000008 |
| #define NF_NETLINK_CONNTRACK_EXP_UPDATE 0x00000010 |
| #define NF_NETLINK_CONNTRACK_EXP_DESTROY 0x00000020 |
| |
| /* Generic structure for encapsulation optional netfilter information. |
| * It is reminiscent of sockaddr, but with sa_family replaced |
| * with attribute type. |
| * ! This should someday be put somewhere generic as now rtnetlink and |
| * ! nfnetlink use the same attributes methods. - J. Schulist. |
| */ |
| |
| struct nfattr { |
| __u16 nfa_len; |
| __u16 nfa_type; /* we use 15 bits for the type, and the highest |
| * bit to indicate whether the payload is nested */ |
| }; |
| |
| /* FIXME: Apart from NFNL_NFA_NESTED shamelessly copy and pasted from |
| * rtnetlink.h, it's time to put this in a generic file */ |
| |
| #define NFNL_NFA_NEST 0x8000 |
| #define NFA_TYPE(attr) ((attr)->nfa_type & 0x7fff) |
| |
| #define NFA_ALIGNTO 4 |
| #define NFA_ALIGN(len) (((len) + NFA_ALIGNTO - 1) & ~(NFA_ALIGNTO - 1)) |
| #define NFA_OK(nfa,len) ((len) > 0 && (nfa)->nfa_len >= sizeof(struct nfattr) \ |
| && (nfa)->nfa_len <= (len)) |
| #define NFA_NEXT(nfa,attrlen) ((attrlen) -= NFA_ALIGN((nfa)->nfa_len), \ |
| (struct nfattr *)(((char *)(nfa)) + NFA_ALIGN((nfa)->nfa_len))) |
| #define NFA_LENGTH(len) (NFA_ALIGN(sizeof(struct nfattr)) + (len)) |
| #define NFA_SPACE(len) NFA_ALIGN(NFA_LENGTH(len)) |
| #define NFA_DATA(nfa) ((void *)(((char *)(nfa)) + NFA_LENGTH(0))) |
| #define NFA_PAYLOAD(nfa) ((int)((nfa)->nfa_len) - NFA_LENGTH(0)) |
| #define NFA_NEST(skb, type) \ |
| ({ struct nfattr *__start = (struct nfattr *)skb_tail_pointer(skb); \ |
| NFA_PUT(skb, (NFNL_NFA_NEST | type), 0, NULL); \ |
| __start; }) |
| #define NFA_NEST_END(skb, start) \ |
| ({ (start)->nfa_len = skb_tail_pointer(skb) - (unsigned char *)(start); \ |
| (skb)->len; }) |
| #define NFA_NEST_CANCEL(skb, start) \ |
| ({ if (start) \ |
| skb_trim(skb, (unsigned char *) (start) - (skb)->data); \ |
| -1; }) |
| |
| #define NFM_NFA(n) ((struct nfattr *)(((char *)(n)) \ |
| + NLMSG_ALIGN(sizeof(struct nfgenmsg)))) |
| #define NFM_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct nfgenmsg)) |
| |
| #endif /* _NFNETLINK_COMPAT_H */ |