1 /* $NetBSD: copyhostent.c,v 1.1.1.1 2011/04/13 18:15:40 elric Exp $ */ 2 3 /* 4 * Copyright (c) 1999 Kungliga Tekniska Högskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * 3. Neither the name of the Institute nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <config.h> 37 38 #include <krb5/roken.h> 39 40 /* 41 * return a malloced copy of `h' 42 */ 43 44 ROKEN_LIB_FUNCTION struct hostent * ROKEN_LIB_CALL 45 copyhostent (const struct hostent *h) 46 { 47 struct hostent *res; 48 char **p; 49 int i, n; 50 51 res = malloc (sizeof (*res)); 52 if (res == NULL) 53 return NULL; 54 res->h_name = NULL; 55 res->h_aliases = NULL; 56 res->h_addrtype = h->h_addrtype; 57 res->h_length = h->h_length; 58 res->h_addr_list = NULL; 59 res->h_name = strdup (h->h_name); 60 if (res->h_name == NULL) { 61 freehostent (res); 62 return NULL; 63 } 64 for (n = 0, p = h->h_aliases; *p != NULL; ++p) 65 ++n; 66 res->h_aliases = malloc ((n + 1) * sizeof(*res->h_aliases)); 67 if (res->h_aliases == NULL) { 68 freehostent (res); 69 return NULL; 70 } 71 for (i = 0; i < n + 1; ++i) 72 res->h_aliases[i] = NULL; 73 for (i = 0; i < n; ++i) { 74 res->h_aliases[i] = strdup (h->h_aliases[i]); 75 if (res->h_aliases[i] == NULL) { 76 freehostent (res); 77 return NULL; 78 } 79 } 80 81 for (n = 0, p = h->h_addr_list; *p != NULL; ++p) 82 ++n; 83 res->h_addr_list = malloc ((n + 1) * sizeof(*res->h_addr_list)); 84 if (res->h_addr_list == NULL) { 85 freehostent (res); 86 return NULL; 87 } 88 for (i = 0; i < n + 1; ++i) { 89 res->h_addr_list[i] = NULL; 90 } 91 for (i = 0; i < n; ++i) { 92 res->h_addr_list[i] = malloc (h->h_length); 93 if (res->h_addr_list[i] == NULL) { 94 freehostent (res); 95 return NULL; 96 } 97 memcpy (res->h_addr_list[i], h->h_addr_list[i], h->h_length); 98 } 99 return res; 100 } 101 102