usr/src/cmd/getent/dogetnetmask.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22
  23 /*
  24  * Copyright (c) 2018 Peter Tribble.
  25  * Copyright (c) 1994-1996, by Sun Microsystems, Inc.
  26  * All rights reserved.
  27  */
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <sys/types.h>
  33 #include <sys/socket.h>
  34 #include <netinet/in.h>
  35 #include <arpa/inet.h>
  36 #include <netdb.h>
  37 #include <libsocket_priv.h>
  38 #include "getent.h"
  39
  40 extern char *inet_nettoa(struct in_addr in);
  41
  42 static int
  43 putnetmask(const struct in_addr key, const struct in_addr netmask, FILE *fp)
  44 {
  45         int rc = 0;
  46         struct in_addr net;
  47
  48         net.s_addr = ntohl(key.s_addr);
  49         if (fprintf(fp, "%-20s", inet_nettoa(net)) == EOF)
  50                 rc = 1;
  51         if (fprintf(fp, " %s", inet_ntoa(netmask)) == EOF)
  52                 rc = 1;
  53         if (putc('\n', fp) == EOF)
  54                 rc = 1;
  55         return (rc);
  56 }
  57
  58 /*
  59  * getnetmaskbyaddr - get entries from network database
  60  */
  61 int
  62 dogetnetmask(const char **list)
  63 {
  64         int rc = EXC_SUCCESS;
  65         struct in_addr addr, netmask;
  66
  67         if (list == NULL || *list == NULL)
  68                 return (EXC_ENUM_NOT_SUPPORTED);
  69
  70         for (; *list != NULL; list++) {
  71                 addr.s_addr = htonl(inet_network(*list));
  72                 if (addr.s_addr != -1) {
  73                         if (getnetmaskbyaddr(addr, &netmask) == 0) {
  74                                 (void) putnetmask(addr, netmask, stdout);
  75                         } else {
  76                                 rc = EXC_NAME_NOT_FOUND;
  77                         }
  78                 } else {
  79                         rc = EXC_NAME_NOT_FOUND;
  80                 }
  81         }
  82
  83         return (rc);
  84 }