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addr.h
1 /*
2  * Copyright (c) 2004,2005 Damien Miller <[email protected]>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 /* Address handling routines */
18 
19 #ifndef _ADDR_H
20 #define _ADDR_H
21 
22 #include <sys/socket.h>
23 #include <netinet/in.h>
24 
25 struct xaddr {
26  sa_family_t af;
27  union {
28  struct in_addr v4;
29  struct in6_addr v6;
30  u_int8_t addr8[16];
31  u_int16_t addr16[8];
32  u_int32_t addr32[4];
33  } xa; /* 128-bit address */
34  u_int32_t scope_id; /* iface scope id for v6 */
35 #define v4 xa.v4
36 #define v6 xa.v6
37 #define addr8 xa.addr8
38 #define addr16 xa.addr16
39 #define addr32 xa.addr32
40 };
41 
42 int addr_unicast_masklen(int af);
43 int addr_xaddr_to_sa(const struct xaddr *xa, struct sockaddr *sa,
44  socklen_t *len, u_int16_t port);
45 int addr_sa_to_xaddr(struct sockaddr *sa, socklen_t slen, struct xaddr *xa);
46 int addr_netmask(int af, u_int l, struct xaddr *n);
47 int addr_hostmask(int af, u_int l, struct xaddr *n);
48 int addr_invert(struct xaddr *n);
49 int addr_pton(const char *p, struct xaddr *n);
50 int addr_sa_pton(const char *h, const char *s, struct sockaddr *sa,
51  socklen_t slen);
52 int addr_pton_cidr(const char *p, struct xaddr *n, u_int *l);
53 int addr_ntop(const struct xaddr *n, char *p, size_t len);
54 int addr_and(struct xaddr *dst, const struct xaddr *a, const struct xaddr *b);
55 int addr_or(struct xaddr *dst, const struct xaddr *a, const struct xaddr *b);
56 int addr_cmp(const struct xaddr *a, const struct xaddr *b);
57 int addr_is_all0s(const struct xaddr *n);
58 int addr_host_is_all0s(const struct xaddr *n, u_int masklen);
59 int addr_host_to_all0s(struct xaddr *a, u_int masklen);
60 int addr_host_to_all1s(struct xaddr *a, u_int masklen);
61 int addr_netmatch(const struct xaddr *host, const struct xaddr *net,
62  u_int masklen);
63 void addr_increment(struct xaddr *a);
64 #endif /* _ADDR_H */