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License cleanup: add SPDX GPL-2.0 license identifier to files with no license
[mirror_ubuntu-bionic-kernel.git] / include / linux / netfilter / ipset / pfxlen.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _PFXLEN_H
3 #define _PFXLEN_H
4
5 #include <asm/byteorder.h>
6 #include <linux/netfilter.h>
7 #include <net/tcp.h>
8
9 /* Prefixlen maps, by Jan Engelhardt */
10 extern const union nf_inet_addr ip_set_netmask_map[];
11 extern const union nf_inet_addr ip_set_hostmask_map[];
12
13 static inline __be32
14 ip_set_netmask(u8 pfxlen)
15 {
16 return ip_set_netmask_map[pfxlen].ip;
17 }
18
19 static inline const __be32 *
20 ip_set_netmask6(u8 pfxlen)
21 {
22 return &ip_set_netmask_map[pfxlen].ip6[0];
23 }
24
25 static inline u32
26 ip_set_hostmask(u8 pfxlen)
27 {
28 return (__force u32) ip_set_hostmask_map[pfxlen].ip;
29 }
30
31 static inline const __be32 *
32 ip_set_hostmask6(u8 pfxlen)
33 {
34 return &ip_set_hostmask_map[pfxlen].ip6[0];
35 }
36
37 extern u32 ip_set_range_to_cidr(u32 from, u32 to, u8 *cidr);
38
39 #define ip_set_mask_from_to(from, to, cidr) \
40 do { \
41 from &= ip_set_hostmask(cidr); \
42 to = from | ~ip_set_hostmask(cidr); \
43 } while (0)
44
45 static inline void
46 ip6_netmask(union nf_inet_addr *ip, u8 prefix)
47 {
48 ip->ip6[0] &= ip_set_netmask6(prefix)[0];
49 ip->ip6[1] &= ip_set_netmask6(prefix)[1];
50 ip->ip6[2] &= ip_set_netmask6(prefix)[2];
51 ip->ip6[3] &= ip_set_netmask6(prefix)[3];
52 }
53
54 #endif /*_PFXLEN_H */