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quagga 1.0.20160315

    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 "if.h"
   27: 
   28: #if 0
   29: union sockunion {
   30:   struct sockinet {
   31:     u_char si_len;
   32:     u_char si_family;
   33:     u_short si_port;
   34:   } su_si;
   35:   struct sockaddr_in  su_sin;
   36:   struct sockaddr_in6 su_sin6;
   37: };
   38: #define su_len                su_si.si_len
   39: #define su_family     su_si.si_family
   40: #define su_port               su_si.si_port
   41: #endif /* 0 */
   42: 
   43: union sockunion 
   44: {
   45:   struct sockaddr sa;
   46:   struct sockaddr_in sin;
   47: #ifdef HAVE_IPV6
   48:   struct sockaddr_in6 sin6;
   49: #endif /* HAVE_IPV6 */
   50: };
   51: 
   52: enum connect_result
   53: {
   54:   connect_error,
   55:   connect_success,
   56:   connect_in_progress
   57: };
   58: 
   59: /* Default address family. */
   60: #ifdef HAVE_IPV6
   61: #define AF_INET_UNION AF_INET6
   62: #else
   63: #define AF_INET_UNION AF_INET
   64: #endif
   65: 
   66: /* Sockunion address string length.  Same as INET6_ADDRSTRLEN. */
   67: #define SU_ADDRSTRLEN 46
   68: 
   69: /* Macro to set link local index to the IPv6 address.  For KAME IPv6
   70:    stack. */
   71: #ifdef KAME
   72: #define	IN6_LINKLOCAL_IFINDEX(a)  ((a).s6_addr[2] << 8 | (a).s6_addr[3])
   73: #define SET_IN6_LINKLOCAL_IFINDEX(a, i) \
   74:   do { \
   75:     (a).s6_addr[2] = ((i) >> 8) & 0xff; \
   76:     (a).s6_addr[3] = (i) & 0xff; \
   77:   } while (0)
   78: #else
   79: #define	IN6_LINKLOCAL_IFINDEX(a)
   80: #define SET_IN6_LINKLOCAL_IFINDEX(a, i)
   81: #endif /* KAME */
   82: 
   83: #define sockunion_family(X)  (X)->sa.sa_family
   84: 
   85: #define sockunion2ip(X)      (X)->sin.sin_addr.s_addr
   86: 
   87: /* Prototypes. */
   88: extern int str2sockunion (const char *, union sockunion *);
   89: extern const char *sockunion2str (const union sockunion *, char *, size_t);
   90: extern int sockunion_cmp (const union sockunion *, const union sockunion *);
   91: extern int sockunion_same (const union sockunion *, const union sockunion *);
   92: extern unsigned int sockunion_hash (const union sockunion *);
   93: 
   94: extern size_t family2addrsize(int family);
   95: extern size_t sockunion_get_addrlen(const union sockunion *);
   96: extern const u_char *sockunion_get_addr(const union sockunion *);
   97: extern void sockunion_set(union sockunion *, int family, const u_char *addr, size_t bytes);
   98: 
   99: extern union sockunion *sockunion_str2su (const char *str);
  100: extern int sockunion_accept (int sock, union sockunion *);
  101: extern int sockunion_stream_socket (union sockunion *);
  102: extern int sockopt_reuseaddr (int);
  103: extern int sockopt_reuseport (int);
  104: extern int sockopt_v6only (int family, int sock);
  105: extern int sockunion_bind (int sock, union sockunion *, 
  106:                            unsigned short, union sockunion *);
  107: extern int sockopt_ttl (int family, int sock, int ttl);
  108: extern int sockopt_minttl (int family, int sock, int minttl);
  109: extern int sockopt_cork (int sock, int onoff);
  110: extern int sockunion_socket (const union sockunion *su);
  111: extern const char *inet_sutop (const union sockunion *su, char *str);
  112: extern enum connect_result sockunion_connect (int fd, const union sockunion *su,
  113:                                               unsigned short port,
  114:                                               ifindex_t);
  115: extern union sockunion *sockunion_getsockname (int);
  116: extern union sockunion *sockunion_getpeername (int);
  117: extern union sockunion *sockunion_dup (const union sockunion *);
  118: extern void sockunion_free (union sockunion *);
  119: 
  120: #ifndef HAVE_INET_NTOP
  121: extern const char * inet_ntop (int family, const void *addrptr, 
  122:                                char *strptr, size_t len);
  123: #endif /* HAVE_INET_NTOP */
  124: 
  125: #ifndef HAVE_INET_PTON
  126: extern int inet_pton (int family, const char *strptr, void *addrptr);
  127: #endif /* HAVE_INET_PTON */
  128: 
  129: #ifndef HAVE_INET_ATON
  130: extern int inet_aton (const char *cp, struct in_addr *inaddr);
  131: #endif
  132: 
  133: #endif /* _ZEBRA_SOCKUNION_H */