lib/sockunion.h

   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
  27 union 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
  41 union 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
  50 enum 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. */
  90 extern int str2sockunion (const char *, union sockunion *);
  91 extern const char *sockunion2str (union sockunion *, char *, size_t);
  92 extern int sockunion_cmp (union sockunion *, union sockunion *);
  93 extern int sockunion_same (union sockunion *, union sockunion *);
  94
  95 extern char *sockunion_su2str (union sockunion *su);
  96 extern union sockunion *sockunion_str2su (const char *str);
  97 extern struct in_addr sockunion_get_in_addr (union sockunion *su);
  98 extern int sockunion_accept (int sock, union sockunion *);
  99 extern int sockunion_stream_socket (union sockunion *);
 100 extern int sockopt_reuseaddr (int);
 101 extern int sockopt_reuseport (int);
 102 extern int sockunion_bind (int sock, union sockunion *,
 103                            unsigned short, union sockunion *);
 104 extern int sockopt_ttl (int family, int sock, int ttl);
 105 extern int sockunion_socket (union sockunion *su);
 106 extern const char *inet_sutop (union sockunion *su, char *str);
 107 extern enum connect_result sockunion_connect (int fd, union sockunion *su,
 108                                               unsigned short port,
 109                                               unsigned int);
 110 extern union sockunion *sockunion_getsockname (int);
 111 extern union sockunion *sockunion_getpeername (int);
 112 extern union sockunion *sockunion_dup (union sockunion *);
 113 extern void sockunion_free (union sockunion *);
 114
 115 #ifndef HAVE_INET_NTOP
 116 extern const char * inet_ntop (int family, const void *addrptr,
 117                                char *strptr, size_t len);
 118 #endif /* HAVE_INET_NTOP */
 119
 120 #ifndef HAVE_INET_PTON
 121 extern int inet_pton (int family, const char *strptr, void *addrptr);
 122 #endif /* HAVE_INET_PTON */
 123
 124 #ifndef HAVE_INET_ATON
 125 extern int inet_aton (const char *cp, struct in_addr *inaddr);
 126 #endif
 127
 128 #endif /* _ZEBRA_SOCKUNION_H */