1 /* $OpenBSD: inetname.c,v 1.3 2017/01/21 11:32:04 guenther Exp $ */ 2 3 /*- 4 * Copyright (c) 1980, 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/signal.h> 33 #include <sys/socket.h> 34 35 #include <netinet/in.h> 36 37 #include <netdb.h> 38 #include <stdlib.h> 39 #include <string.h> 40 41 #include "systat.h" 42 43 const char * 44 inet6name(struct in6_addr *in6) 45 { 46 static char line[NI_MAXHOST]; 47 struct sockaddr_in6 sin6; 48 int flags; 49 50 flags = nflag ? NI_NUMERICHOST : 0; 51 if (IN6_IS_ADDR_UNSPECIFIED(in6)) 52 return "*"; 53 memset(&sin6, 0, sizeof(sin6)); 54 sin6.sin6_family = AF_INET6; 55 sin6.sin6_addr = *in6; 56 if (getnameinfo((struct sockaddr *)&sin6, sizeof(struct sockaddr_in6), 57 line, sizeof(line), NULL, 0, flags) == 0) 58 return line; 59 return "?"; 60 } 61 62 const char * 63 inetname(struct in_addr in) 64 { 65 static char line[NI_MAXHOST]; 66 struct sockaddr_in si; 67 int flags, e; 68 69 flags = nflag ? NI_NUMERICHOST : 0; 70 if (in.s_addr == INADDR_ANY) 71 return "*"; 72 73 memset(&si, 0, sizeof(si)); 74 si.sin_family = AF_INET; 75 si.sin_addr = in; 76 77 e = getnameinfo((struct sockaddr *)&si, sizeof(struct sockaddr_in), 78 line, sizeof(line), NULL, 0, flags); 79 80 if (e == 0) 81 return line; 82 83 error("Lookup: %s", gai_strerror(e)); 84 85 return "?"; 86 } 87