1/*
2 * Socket union header.
3 * Copyright (c) 1997 Kunihiro Ishiguro
4 *
5 * This file is part of GNU Zebra.
6 *
7 * GNU Zebra is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2, or (at your option) any
10 * later version.
11 *
12 * GNU Zebra is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Zebra; see the file COPYING.  If not, write to the Free
19 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20 * 02111-1307, USA.
21 */
22
23#ifndef _ZEBRA_SOCKUNION_H
24#define _ZEBRA_SOCKUNION_H
25
26#if 0
27union sockunion {
28  struct sockinet {
29    u_char si_len;
30    u_char si_family;
31    u_short si_port;
32  } su_si;
33  struct sockaddr_in  su_sin;
34  struct sockaddr_in6 su_sin6;
35};
36#define su_len                su_si.si_len
37#define su_family     su_si.si_family
38#define su_port               su_si.si_port
39#endif /* 0 */
40
41union sockunion
42{
43  struct sockaddr sa;
44  struct sockaddr_in sin;
45#ifdef HAVE_IPV6
46  struct sockaddr_in6 sin6;
47#endif /* HAVE_IPV6 */
48};
49
50enum connect_result
51{
52  connect_error,
53  connect_success,
54  connect_in_progress
55};
56
57/* Default address family. */
58#ifdef HAVE_IPV6
59#define AF_INET_UNION AF_INET6
60#else
61#define AF_INET_UNION AF_INET
62#endif
63
64/* Sockunion address string length.  Same as INET6_ADDRSTRLEN. */
65#define SU_ADDRSTRLEN 46
66
67/* Macro to set link local index to the IPv6 address.  For KAME IPv6
68   stack. */
69#ifdef KAME
70#define	IN6_LINKLOCAL_IFINDEX(a)  ((a).s6_addr[2] << 8 | (a).s6_addr[3])
71#define SET_IN6_LINKLOCAL_IFINDEX(a, i) \
72  do { \
73    (a).s6_addr[2] = ((i) >> 8) & 0xff; \
74    (a).s6_addr[3] = (i) & 0xff; \
75  } while (0)
76#else
77#define	IN6_LINKLOCAL_IFINDEX(a)
78#define SET_IN6_LINKLOCAL_IFINDEX(a, i)
79#endif /* KAME */
80
81/* shortcut macro to specify address field of struct sockaddr */
82#define sock2ip(X)   (((struct sockaddr_in *)(X))->sin_addr.s_addr)
83#ifdef HAVE_IPV6
84#define sock2ip6(X)  (((struct sockaddr_in6 *)(X))->sin6_addr.s6_addr)
85#endif /* HAVE_IPV6 */
86
87#define sockunion_family(X)  (X)->sa.sa_family
88
89/* Prototypes. */
90int str2sockunion (char *, union sockunion *);
91const char *sockunion2str (union sockunion *, char *, size_t);
92int sockunion_cmp (union sockunion *, union sockunion *);
93int sockunion_same (union sockunion *, union sockunion *);
94
95char *sockunion_su2str (union sockunion *su);
96union sockunion *sockunion_str2su (char *str);
97struct in_addr sockunion_get_in_addr (union sockunion *su);
98int sockunion_accept (int sock, union sockunion *);
99int sockunion_stream_socket (union sockunion *);
100int sockopt_reuseaddr (int);
101int sockopt_reuseport (int);
102int sockunion_bind (int sock, union sockunion *, unsigned short, union sockunion *);
103int sockopt_ttl (int family, int sock, int ttl);
104int sockunion_socket (union sockunion *su);
105const char *inet_sutop (union sockunion *su, char *str);
106enum connect_result
107sockunion_connect (int fd, union sockunion *su, unsigned short port, unsigned int);
108union sockunion *sockunion_getsockname (int);
109union sockunion *sockunion_getpeername (int);
110union sockunion *sockunion_dup (union sockunion *);
111void sockunion_free (union sockunion *);
112
113#ifndef HAVE_INET_NTOP
114const char *
115inet_ntop (int family, const void *addrptr, char *strptr, size_t len);
116#endif /* HAVE_INET_NTOP */
117
118#ifndef HAVE_INET_PTON
119int
120inet_pton (int family, const char *strptr, void *addrptr);
121#endif /* HAVE_INET_PTON */
122
123#ifndef HAVE_INET_ATON
124int
125inet_aton (const char *cp, struct in_addr *inaddr);
126#endif
127
128#endif /* _ZEBRA_SOCKUNION_H */
129