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: gethostbynis.c,v 1.1.1.1 2003/11/19 01:51:27 kyu3 Exp $";
28 static char rcsid[] = "$Id: gethostbynis.c,v 1.1.1.1 2003/11/19 01:51:27 kyu3 Exp $";
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 <stdlib.h>
38 #include <ctype.h>
39 #include <errno.h>
40 #include <string.h>
41 #ifdef YP
42 #include <rpc/rpc.h>
43 #include <rpcsvc/yp_prot.h>
44 #include <rpcsvc/ypclnt.h>
45 #endif
46
47 #define MAXALIASES 35
48 #define MAXADDRS 35
49
50 #ifdef YP
51 static char *host_aliases[MAXALIASES];
52 static char hostaddr[MAXADDRS];
53 static char *host_addrs[2];
54 #endif /* YP */
55
56 static struct hostent *
_gethostbynis(const char * name,char * map,int af)57 _gethostbynis(const char *name, char *map, int af)
58 {
59 #ifdef YP
60 register char *cp, **q;
61 char *result;
62 int resultlen;
63 static struct hostent h;
64 static char *domain = (char *)NULL;
65 static char ypbuf[YPMAXRECORD + 2];
66
67 switch(af) {
68 case AF_INET:
69 break;
70 default:
71 case AF_INET6:
72 errno = EAFNOSUPPORT;
73 return NULL;
74 }
75
76 if (domain == (char *)NULL)
77 if (yp_get_default_domain (&domain))
78 return ((struct hostent *)NULL);
79
80 if (yp_match(domain, map, name, strlen(name), &result, &resultlen))
81 return ((struct hostent *)NULL);
82
83 /* avoid potential memory leak */
84 bcopy((char *)result, (char *)&ypbuf, resultlen);
85 ypbuf[resultlen] = '\0';
86 free(result);
87 result = (char *)&ypbuf;
88
89 if ((cp = index(result, '\n')))
90 *cp = '\0';
91
92 cp = strpbrk(result, " \t");
93 *cp++ = '\0';
94 h.h_addr_list = host_addrs;
95 h.h_addr = hostaddr;
96 *((u_long *)h.h_addr) = inet_addr(result);
97 h.h_length = sizeof(u_long);
98 h.h_addrtype = AF_INET;
99 while (*cp == ' ' || *cp == '\t')
100 cp++;
101 h.h_name = cp;
102 q = h.h_aliases = host_aliases;
103 cp = strpbrk(cp, " \t");
104 if (cp != NULL)
105 *cp++ = '\0';
106 while (cp && *cp) {
107 if (*cp == ' ' || *cp == '\t') {
108 cp++;
109 continue;
110 }
111 if (q < &host_aliases[MAXALIASES - 1])
112 *q++ = cp;
113 cp = strpbrk(cp, " \t");
114 if (cp != NULL)
115 *cp++ = '\0';
116 }
117 *q = NULL;
118 return (&h);
119 #else
120 return (NULL);
121 #endif /* YP */
122 }
123
124 struct hostent *
_gethostbynisname(const char * name,int af)125 _gethostbynisname(const char *name, int af)
126 {
127 return _gethostbynis(name, "hosts.byname", af);
128 }
129
130 struct hostent *
_gethostbynisaddr(const char * addr,int len,int af)131 _gethostbynisaddr(const char *addr, int len, int af)
132 {
133 return _gethostbynis(inet_ntoa(*(struct in_addr *)addr),"hosts.byaddr", af);
134 }
135