exec/totemip.h

   1 /*
   2  * Copyright (c) 2005 Red Hat Inc
   3  * Author: Patrick Caulfield (pcaulfie@redhat.com)
   4  *
   5  * Copyright (c) 2006 Sun Microsystems, Inc.
   6  *
   7  * All rights reserved.
   8  *
   9  * This software licensed under BSD license, the text of which follows:
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions are met:
  13  *
  14  * - Redistributions of source code must retain the above copyright notice,
  15  *   this list of conditions and the following disclaimer.
  16  * - Redistributions in binary form must reproduce the above copyright notice,
  17  *   this list of conditions and the following disclaimer in the documentation
  18  *   and/or other materials provided with the distribution.
  19  * - Neither the name of the MontaVista Software, Inc. nor the names of its
  20  *   contributors may be used to endorse or promote products derived from this
  21  *   software without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  24  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  27  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  33  * THE POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 /* IPv4/6 abstraction */
  37
  38 #ifndef TOTEMIP_H_DEFINED
  39 #define TOTEMIP_H_DEFINED
  40
  41 #include <assert.h>
  42 #include <string.h>
  43 #include <sys/socket.h>
  44 #include <netinet/in.h>
  45
  46 #ifdef SO_NOSIGPIPE
  47 #ifndef MSG_NOSIGNAL
  48 #define MSG_NOSIGNAL 0
  49 #endif
  50 void totemip_nosigpipe(int s);
  51 #else
  52 #define totemip_nosigpipe(s)
  53 #endif
  54
  55 #define TOTEMIP_ADDRLEN (sizeof(struct in6_addr))
  56
  57 /* These are the things that get passed around */
  58 struct totem_ip_address
  59 {
  60         unsigned int   nodeid;
  61         unsigned short family;
  62         unsigned char  addr[TOTEMIP_ADDRLEN];   /* in Network Byteorder */
  63 } __attribute__((packed));
  64
  65 typedef struct totem_ip_address totem_ip_address_t;
  66
  67 static inline void swab_totem_ip_address_t (totem_ip_address_t *to_swab)
  68 {
  69         to_swab->nodeid = swab32 (to_swab->nodeid);
  70         to_swab->family = swab16 (to_swab->family);
  71 }
  72
  73 extern int totemip_equal(struct totem_ip_address *addr1, struct totem_ip_address *addr2);
  74 extern int totemip_compare(const void *a, const void *b);
  75 extern void totemip_copy(struct totem_ip_address *addr1, struct totem_ip_address *addr2);
  76 extern void totemip_copy_endian_convert(struct totem_ip_address *addr1, struct totem_ip_address *addr2);
  77 int totemip_localhost(int family, struct totem_ip_address *localhost);
  78 extern int totemip_localhost_check(struct totem_ip_address *addr);
  79 extern const char *totemip_print(struct totem_ip_address *addr);
  80 extern int totemip_sockaddr_to_totemip_convert(struct sockaddr_storage *saddr, struct totem_ip_address *ip_addr);
  81 extern int totemip_totemip_to_sockaddr_convert(struct totem_ip_address *ip_addr,
  82                                                uint16_t port, struct sockaddr_storage *saddr, int *addrlen);
  83 extern int totemip_parse(struct totem_ip_address *totemip, char *addr, int family);
  84 extern int totemip_iface_check(struct totem_ip_address *bindnet, struct totem_ip_address *boundto, int *interface_up, int *interface_num);
  85
  86 /* These two simulate a zero in_addr by clearing the family field */
  87 static inline void totemip_zero_set(struct totem_ip_address *addr)
  88 {
  89         addr->family = 0;
  90 }
  91 static inline int totemip_zero_check(struct totem_ip_address *addr)
  92 {
  93         return (addr->family == 0);
  94 }
  95
  96 static inline unsigned int totemip_compute_nodeid_from_addr(
  97         const struct totem_ip_address *addr)
  98 {
  99         struct in_addr *in = (struct in_addr *)addr->addr;
 100         assert(addr->family == AF_INET);
 101
 102         return (unsigned int)ntohl(in->s_addr);
 103 }
 104
 105 #endif