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Annotation of src/usr.bin/systat/inetname.c, Revision 1.1

1.1     ! giovanni    1: /*     $OpenBSD$       */
        !             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/param.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_len = sizeof(struct sockaddr_in6);
        !            56:         sin6.sin6_addr = *in6;
        !            57:         if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
        !            58:             line, sizeof(line), NULL, 0, flags) == 0)
        !            59:                 return line;
        !            60:         return "?";
        !            61: }
        !            62:
        !            63: const char *
        !            64: inetname(struct in_addr in)
        !            65: {
        !            66:         static char line[NI_MAXHOST];
        !            67:         struct sockaddr_in si;
        !            68:         int flags, e;
        !            69:
        !            70:         flags = nflag ? NI_NUMERICHOST : 0;
        !            71:         if (in.s_addr == INADDR_ANY)
        !            72:                 return "*";
        !            73:
        !            74:         memset(&si, 0, sizeof(si));
        !            75:         si.sin_family = AF_INET;
        !            76:         si.sin_len = sizeof(struct sockaddr_in);
        !            77:         si.sin_addr = in;
        !            78:
        !            79:         e = getnameinfo((struct sockaddr *)&si, si.sin_len,
        !            80:                         line, sizeof(line), NULL, 0, flags);
        !            81:
        !            82:         if (e == 0)
        !            83:                 return line;
        !            84:
        !            85:         error("Lookup: %s", gai_strerror(e));
        !            86:
        !            87:         return "?";
        !            88: }