| 1 | /*-
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| 2 | * Copyright (c) 1994, Garrett Wollman
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| 3 | *
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| 4 | * Redistribution and use in source and binary forms, with or without
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| 5 | * modification, are permitted provided that the following conditions
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| 6 | * are met:
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| 7 | * 1. Redistributions of source code must retain the above copyright
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| 8 | * notice, this list of conditions and the following disclaimer.
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| 9 | * 2. Redistributions in binary form must reproduce the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer in the
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| 11 | * documentation and/or other materials provided with the distribution.
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| 12 | *
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| 13 | * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND
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| 14 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 16 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 17 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 18 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 19 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 20 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 21 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 22 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 23 | * SUCH DAMAGE.
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| 24 | */
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| 25 |
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| 26 | #if defined(LIBC_SCCS) && !defined(lint)
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| 27 | static char sccsid[] = "@(#)$Id: gethostbynis.c,v 1.1.1.1 2003/11/19 01:51:27 kyu3 Exp $";
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| 28 | static char rcsid[] = "$Id: gethostbynis.c,v 1.1.1.1 2003/11/19 01:51:27 kyu3 Exp $";
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| 29 | #endif /* LIBC_SCCS and not lint */
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| 30 |
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| 31 | #include <sys/param.h>
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| 32 | #include <sys/socket.h>
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| 33 | #include <netinet/in.h>
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| 34 | #include <arpa/inet.h>
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| 35 | #include <netdb.h>
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| 36 | #include <stdio.h>
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| 37 | #include <stdlib.h>
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| 38 | #include <ctype.h>
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| 39 | #include <errno.h>
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| 40 | #include <string.h>
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| 41 | #ifdef YP
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| 42 | #include <rpc/rpc.h>
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| 43 | #include <rpcsvc/yp_prot.h>
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| 44 | #include <rpcsvc/ypclnt.h>
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| 45 | #endif
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| 46 |
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| 47 | #define MAXALIASES 35
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| 48 | #define MAXADDRS 35
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| 49 |
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| 50 | #ifdef YP
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| 51 | static char *host_aliases[MAXALIASES];
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| 52 | static char hostaddr[MAXADDRS];
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| 53 | static char *host_addrs[2];
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| 54 | #endif /* YP */
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| 55 |
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| 56 | static struct hostent *
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| 57 | _gethostbynis(const char *name, char *map, int af)
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| 58 | {
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| 59 | #ifdef YP
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| 60 | register char *cp, **q;
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| 61 | char *result;
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| 62 | int resultlen;
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| 63 | static struct hostent h;
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| 64 | static char *domain = (char *)NULL;
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| 65 | static char ypbuf[YPMAXRECORD + 2];
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| 66 |
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| 67 | switch(af) {
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| 68 | case AF_INET:
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| 69 | break;
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| 70 | default:
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| 71 | case AF_INET6:
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| 72 | errno = EAFNOSUPPORT;
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| 73 | return NULL;
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| 74 | }
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| 75 |
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| 76 | if (domain == (char *)NULL)
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| 77 | if (yp_get_default_domain (&domain))
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| 78 | return ((struct hostent *)NULL);
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| 79 |
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| 80 | if (yp_match(domain, map, name, strlen(name), &result, &resultlen))
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| 81 | return ((struct hostent *)NULL);
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| 82 |
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| 83 | /* avoid potential memory leak */
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| 84 | bcopy((char *)result, (char *)&ypbuf, resultlen);
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| 85 | ypbuf[resultlen] = '\0';
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| 86 | free(result);
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| 87 | result = (char *)&ypbuf;
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| 88 |
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| 89 | if ((cp = index(result, '\n')))
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| 90 | *cp = '\0';
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| 91 |
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| 92 | cp = strpbrk(result, " \t");
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| 93 | *cp++ = '\0';
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| 94 | h.h_addr_list = host_addrs;
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| 95 | h.h_addr = hostaddr;
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| 96 | *((u_long *)h.h_addr) = inet_addr(result);
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| 97 | h.h_length = sizeof(u_long);
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| 98 | h.h_addrtype = AF_INET;
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| 99 | while (*cp == ' ' || *cp == '\t')
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| 100 | cp++;
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| 101 | h.h_name = cp;
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| 102 | q = h.h_aliases = host_aliases;
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| 103 | cp = strpbrk(cp, " \t");
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| 104 | if (cp != NULL)
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| 105 | *cp++ = '\0';
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| 106 | while (cp && *cp) {
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| 107 | if (*cp == ' ' || *cp == '\t') {
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| 108 | cp++;
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| 109 | continue;
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| 110 | }
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| 111 | if (q < &host_aliases[MAXALIASES - 1])
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| 112 | *q++ = cp;
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| 113 | cp = strpbrk(cp, " \t");
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| 114 | if (cp != NULL)
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| 115 | *cp++ = '\0';
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| 116 | }
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| 117 | *q = NULL;
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| 118 | return (&h);
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| 119 | #else
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| 120 | return (NULL);
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| 121 | #endif /* YP */
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| 122 | }
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| 123 |
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| 124 | struct hostent *
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| 125 | _gethostbynisname(const char *name, int af)
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| 126 | {
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| 127 | return _gethostbynis(name, "hosts.byname", af);
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| 128 | }
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| 129 |
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| 130 | struct hostent *
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| 131 | _gethostbynisaddr(const char *addr, int len, int af)
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| 132 | {
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| 133 | return _gethostbynis(inet_ntoa(*(struct in_addr *)addr),"hosts.byaddr", af);
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| 134 | }
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