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Annotation of src/usr.bin/systat/inetname.c, Revision 1.3

1.3     ! guenther    1: /*     $OpenBSD: inetname.c,v 1.2 2015/01/16 00:03:37 deraadt Exp $    */
1.1       giovanni    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:
1.2       deraadt    32: #include <sys/signal.h>
1.1       giovanni   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;
1.3     ! guenther   56:         if (getnameinfo((struct sockaddr *)&sin6, sizeof(struct sockaddr_in6),
1.1       giovanni   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:
1.3     ! guenther   77:         e = getnameinfo((struct sockaddr *)&si, sizeof(struct sockaddr_in),
1.1       giovanni   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: }