1 /*- 2 * Copyright (c) 1994, Garrett Wollman 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26 #if defined(LIBC_SCCS) && !defined(lint) 27 static char sccsid[] = "@(#)$Id$"; 28 static char rcsid[] = "$Id$"; 29 #endif /* LIBC_SCCS and not lint */ 30 31 #include <sys/param.h> 32 #include <sys/socket.h> 33 #include <netinet/in.h> 34 #include <arpa/inet.h> 35 #include <netdb.h> 36 #include <stdio.h> 37 #include <ctype.h> 38 #include <errno.h> 39 #include <string.h> 40 41 #define MAXALIASES 35 42 #define MAXADDRS 35 43 44 #ifdef YP 45 static char *host_aliases[MAXALIASES]; 46 static char hostaddr[MAXADDRS]; 47 static char *host_addrs[2]; 48 #endif /* YP */ 49 50 static struct hostent * 51 _gethostbynis(name, map) 52 char *name, *map; 53 { 54 #ifdef YP 55 register char *cp, **q; 56 char *result; 57 int resultlen; 58 static struct hostent h; 59 static char *domain = (char *)NULL; 60 61 if (domain == (char *)NULL) 62 if (yp_get_default_domain (&domain)) 63 return ((struct hostent *)NULL); 64 65 if (yp_match(domain, map, name, strlen(name), &result, &resultlen)) 66 return ((struct hostent *)NULL); 67 68 if ((cp = index(result, '\n'))) 69 *cp = '\0'; 70 71 cp = strpbrk(result, " \t"); 72 *cp++ = '\0'; 73 h.h_addr_list = host_addrs; 74 h.h_addr = hostaddr; 75 *((u_long *)h.h_addr) = inet_addr(result); 76 h.h_length = sizeof(u_long); 77 h.h_addrtype = AF_INET; 78 while (*cp == ' ' || *cp == '\t') 79 cp++; 80 h.h_name = cp; 81 q = h.h_aliases = host_aliases; 82 cp = strpbrk(cp, " \t"); 83 if (cp != NULL) 84 *cp++ = '\0'; 85 while (cp && *cp) { 86 if (*cp == ' ' || *cp == '\t') { 87 cp++; 88 continue; 89 } 90 if (q < &host_aliases[MAXALIASES - 1]) 91 *q++ = cp; 92 cp = strpbrk(cp, " \t"); 93 if (cp != NULL) 94 *cp++ = '\0'; 95 } 96 *q = NULL; 97 return (&h); 98 #else 99 return (NULL); 100 #endif /* YP */ 101 } 102 103 struct hostent * 104 _gethostbynisname(name) 105 char *name; 106 { 107 return _gethostbynis(name, "hosts.byname"); 108 } 109 110 struct hostent * 111 _gethostbynisaddr(name) 112 char *name; 113 { 114 return _gethostbynis(name, "hosts.byaddr"); 115 } 116