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 #include "privs.h"
  27
  28 union sockunion
  29 {
  30   struct sockaddr sa;
  31   struct sockaddr_in sin;
  32   struct sockaddr_in6 sin6;
  33 };
  34
  35 enum connect_result
  36 {
  37   connect_error,
  38   connect_success,
  39   connect_in_progress
  40 };
  41
  42 /* Default address family. */
  43 #ifdef HAVE_IPV6
  44 #define AF_INET_UNION AF_INET6
  45 #else
  46 #define AF_INET_UNION AF_INET
  47 #endif
  48
  49 /* Sockunion address string length.  Same as INET6_ADDRSTRLEN. */
  50 #define SU_ADDRSTRLEN 46
  51
  52 /* Macro to set link local index to the IPv6 address.  For KAME IPv6
  53    stack. */
  54 #ifdef KAME
  55 #define IN6_LINKLOCAL_IFINDEX(a)  ((a).s6_addr[2] << 8 | (a).s6_addr[3])
  56 #define SET_IN6_LINKLOCAL_IFINDEX(a, i) \
  57   do { \
  58     (a).s6_addr[2] = ((i) >> 8) & 0xff; \
  59     (a).s6_addr[3] = (i) & 0xff; \
  60   } while (0)
  61 #else
  62 #define IN6_LINKLOCAL_IFINDEX(a)
  63 #define SET_IN6_LINKLOCAL_IFINDEX(a, i)
  64 #endif /* KAME */
  65
  66 #define sockunion_family(X)  (X)->sa.sa_family
  67
  68 #define sockunion2ip(X)      (X)->sin.sin_addr.s_addr
  69
  70 /* Prototypes. */
  71 extern int str2sockunion (const char *, union sockunion *);
  72 extern const char *sockunion2str (const union sockunion *, char *, size_t);
  73 extern int sockunion_cmp (const union sockunion *, const union sockunion *);
  74 extern int sockunion_same (const union sockunion *, const union sockunion *);
  75 extern unsigned int sockunion_hash (const union sockunion *);
  76
  77 extern size_t family2addrsize(int family);
  78 extern size_t sockunion_get_addrlen(const union sockunion *);
  79 extern const u_char *sockunion_get_addr(const union sockunion *);
  80 extern void sockunion_set(union sockunion *, int family, const u_char *addr, size_t bytes);
  81
  82 extern union sockunion *sockunion_str2su (const char *str);
  83 extern int sockunion_accept (int sock, union sockunion *);
  84 extern int sockunion_stream_socket (union sockunion *);
  85 extern int sockopt_reuseaddr (int);
  86 extern int sockopt_reuseport (int);
  87 extern int sockopt_v6only (int family, int sock);
  88 extern int sockunion_bind (int sock, union sockunion *,
  89                            unsigned short, union sockunion *);
  90 extern int sockopt_ttl (int family, int sock, int ttl);
  91 extern int sockopt_minttl (int family, int sock, int minttl);
  92 extern int sockopt_cork (int sock, int onoff);
  93 extern int sockopt_mark_default(int sock, int mark, struct zebra_privs_t *);
  94 extern int sockunion_socket (const union sockunion *su);
  95 extern const char *inet_sutop (const union sockunion *su, char *str);
  96 extern enum connect_result sockunion_connect (int fd, const union sockunion *su,
  97                                               unsigned short port,
  98                                               unsigned int);
  99 extern union sockunion *sockunion_getsockname (int);
 100 extern union sockunion *sockunion_getpeername (int);
 101 extern union sockunion *sockunion_dup (const union sockunion *);
 102 extern void sockunion_free (union sockunion *);
 103 extern void sockunion_init (union sockunion *);
 104
 105 #ifndef HAVE_INET_NTOP
 106 extern const char * inet_ntop (int family, const void *addrptr,
 107                                char *strptr, size_t len);
 108 #endif /* HAVE_INET_NTOP */
 109
 110 #ifndef HAVE_INET_PTON
 111 extern int inet_pton (int family, const char *strptr, void *addrptr);
 112 #endif /* HAVE_INET_PTON */
 113
 114 #ifndef HAVE_INET_ATON
 115 extern int inet_aton (const char *cp, struct in_addr *inaddr);
 116 #endif
 117
 118 #endif /* _ZEBRA_SOCKUNION_H */