/* $OpenBSD: inetname.c,v 1.3 2017/01/21 11:32:04 guenther Exp $ */ /*- * Copyright (c) 1980, 1992, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/signal.h> #include <sys/socket.h> #include <netinet/in.h> #include <netdb.h> #include <stdlib.h> #include <string.h> #include "systat.h" const char * inet6name(struct in6_addr *in6) { static char line[NI_MAXHOST]; struct sockaddr_in6 sin6; int flags; flags = nflag ? NI_NUMERICHOST : 0; if (IN6_IS_ADDR_UNSPECIFIED(in6)) return "*"; memset(&sin6, 0, sizeof(sin6)); sin6.sin6_family = AF_INET6; sin6.sin6_addr = *in6; if (getnameinfo((struct sockaddr *)&sin6, sizeof(struct sockaddr_in6), line, sizeof(line), NULL, 0, flags) == 0) return line; return "?"; } const char * inetname(struct in_addr in) { static char line[NI_MAXHOST]; struct sockaddr_in si; int flags, e; flags = nflag ? NI_NUMERICHOST : 0; if (in.s_addr == INADDR_ANY) return "*"; memset(&si, 0, sizeof(si)); si.sin_family = AF_INET; si.sin_addr = in; e = getnameinfo((struct sockaddr *)&si, sizeof(struct sockaddr_in), line, sizeof(line), NULL, 0, flags); if (e == 0) return line; error("Lookup: %s", gai_strerror(e)); return "?"; }