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#define sockunion_family(X)  (X)->sa.sa_family
82
83#define sockunion2ip(X)      (X)->sin.sin_addr.s_addr
84
85/* Prototypes. */
86extern int str2sockunion (const char *, union sockunion *);
87extern const char *sockunion2str (union sockunion *, char *, size_t);
88extern int sockunion_cmp (union sockunion *, union sockunion *);
89extern int sockunion_same (union sockunion *, union sockunion *);
90
91extern union sockunion *sockunion_str2su (const char *str);
92extern int sockunion_accept (int sock, union sockunion *);
93extern int sockunion_stream_socket (union sockunion *);
94extern int sockopt_reuseaddr (int);
95extern int sockopt_reuseport (int);
96extern int sockopt_v6only (int family, int sock);
97extern int sockunion_bind (int sock, union sockunion *,
98                           unsigned short, union sockunion *);
99extern int sockopt_ttl (int family, int sock, int ttl);
100extern int sockopt_minttl (int family, int sock, int minttl);
101extern int sockopt_cork (int sock, int onoff);
102extern int sockunion_socket (union sockunion *su);
103extern const char *inet_sutop (union sockunion *su, char *str);
104extern enum connect_result sockunion_connect (int fd, union sockunion *su,
105                                              unsigned short port,
106                                              unsigned int);
107extern union sockunion *sockunion_getsockname (int);
108extern union sockunion *sockunion_getpeername (int);
109extern union sockunion *sockunion_dup (union sockunion *);
110extern void sockunion_free (union sockunion *);
111
112#ifndef HAVE_INET_NTOP
113extern const char * inet_ntop (int family, const void *addrptr,
114                               char *strptr, size_t len);
115#endif /* HAVE_INET_NTOP */
116
117#ifndef HAVE_INET_PTON
118extern int inet_pton (int family, const char *strptr, void *addrptr);
119#endif /* HAVE_INET_PTON */
120
121#ifndef HAVE_INET_ATON
122extern int inet_aton (const char *cp, struct in_addr *inaddr);
123#endif
124
125#endif /* _ZEBRA_SOCKUNION_H */
126