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* lib/inet6.c This file contains an implementation of the "INET6"
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* support functions for the net-tools.
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* (most of it copied from lib/inet.c 1.26).
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* Version: $Id: inet6.c,v 1.10 2000/10/28 11:04:00 pb Exp $
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* Author: Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
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* Copyright 1993 MicroWalt Corporation
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*960808 {0.01} Frank Strauss : adapted for IPv6 support
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*980701 {0.02} Arnaldo C. Melo: GNU gettext instead of catgets
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*990824 Bernd Eckenfels: clear members for selecting v6 address
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* This program is free software; you can redistribute it
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* and/or modify it under the terms of the GNU General
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* Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at
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* your option) any later version.
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#include <asm/types.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <arpa/nameser.h>
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#include "net-support.h"
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#include "pathnames.h"
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extern int h_errno; /* some netdb.h versions don't export this */
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static int INET6_resolve(char *name, struct sockaddr_in6 *sin6)
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struct addrinfo req, *ai;
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memset (&req, '\0', sizeof req);
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req.ai_family = AF_INET6;
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if ((s = getaddrinfo(name, NULL, &req, &ai))) {
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fprintf(stderr, "getaddrinfo: %s: %d\n", name, s);
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memcpy(sin6, ai->ai_addr, sizeof(struct sockaddr_in6));
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#ifndef IN6_IS_ADDR_UNSPECIFIED
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#define IN6_IS_ADDR_UNSPECIFIED(a) \
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(((__u32 *) (a))[0] == 0 && ((__u32 *) (a))[1] == 0 && \
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((__u32 *) (a))[2] == 0 && ((__u32 *) (a))[3] == 0)
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static int INET6_rresolve(char *name, struct sockaddr_in6 *sin6, int numeric)
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if (sin6->sin6_family != AF_INET6) {
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fprintf(stderr, _("rresolve: unsupport address family %d !\n"),
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if (numeric & 0x7FFF) {
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inet_ntop(AF_INET6, &sin6->sin6_addr, name, 80);
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if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
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strcpy(name, "default");
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if ((s = getnameinfo((struct sockaddr *) sin6, sizeof(struct sockaddr_in6),
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name, 255 /* !! */ , NULL, 0, 0))) {
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fputs("getnameinfo failed\n", stderr);
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static void INET6_reserror(char *text)
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/* Display an Internet socket address. */
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static char *INET6_print(unsigned char *ptr)
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static char name[80];
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inet_ntop(AF_INET6, (struct in6_addr *) ptr, name, 80);
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/* Display an Internet socket address. */
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/* dirty! struct sockaddr usually doesn't suffer for inet6 addresses, fst. */
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static char *INET6_sprint(struct sockaddr *sap, int numeric)
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static char buff[128];
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if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
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return safe_strncpy(buff, _("[NONE SET]"), sizeof(buff));
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if (INET6_rresolve(buff, (struct sockaddr_in6 *) sap, numeric) != 0)
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return safe_strncpy(buff, _("[UNKNOWN]"), sizeof(buff));
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static int INET6_getsock(char *bufp, struct sockaddr *sap)
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struct sockaddr_in6 *sin6;
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sin6 = (struct sockaddr_in6 *) sap;
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sin6->sin6_family = AF_INET6;
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if (inet_pton(AF_INET6, bufp, sin6->sin6_addr.s6_addr) <= 0)
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static int INET6_input(int type, char *bufp, struct sockaddr *sap)
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return (INET6_getsock(bufp, sap));
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return (INET6_resolve(bufp, (struct sockaddr_in6 *) sap));
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struct aftype inet6_aftype =
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"inet6", NULL, /*"IPv6", */ AF_INET6, sizeof(struct in6_addr),
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INET6_print, INET6_sprint, INET6_input, INET6_reserror,
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INET6_rprint, INET6_rinput, NULL,
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#endif /* HAVE_AFINET6 */