source: rtems/cpukit/libnetworking/libc/gethostbynis.c @ 082d4a2

4.104.114.95
Last change on this file since 082d4a2 was 082d4a2, checked in by Ralf Corsepius <ralf.corsepius@…>, on 08/02/08 at 05:37:10

Add missing prototypes.

  • Property mode set to 100644
File size: 3.4 KB
Line 
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 HAVE_CONFIG_H
27#include "config.h"
28#endif
29
30#include <sys/param.h>
31#include <sys/socket.h>
32#include <netinet/in.h>
33#include <arpa/inet.h>
34#include <netdb.h>
35#include <stdio.h>
36#include <stdlib.h>
37#include <ctype.h>
38#include <errno.h>
39#include <string.h>
40#ifdef YP
41#include <rpc/rpc.h>
42#include <rpcsvc/yp_prot.h>
43#include <rpcsvc/ypclnt.h>
44#endif
45
46#define MAXALIASES      35
47#define MAXADDRS        35
48
49#ifdef YP
50static char *host_aliases[MAXALIASES];
51static char hostaddr[MAXADDRS];
52static char *host_addrs[2];
53#endif /* YP */
54
55static struct hostent *
56_gethostbynis(
57        const char *name,
58        char *map,
59        int af)
60{
61#ifdef YP
62        register char *cp, **q;
63        char *result;
64        int resultlen;
65        static struct hostent h;
66        static char *domain = (char *)NULL;
67        static char ypbuf[YPMAXRECORD + 2];
68
69        switch(af) {
70        case AF_INET:
71                break;
72        default:
73        case AF_INET6:
74                errno = EAFNOSUPPORT;
75                return NULL;
76        }
77
78        if (domain == (char *)NULL)
79                if (yp_get_default_domain (&domain))
80                        return ((struct hostent *)NULL);
81
82        if (yp_match(domain, map, name, strlen(name), &result, &resultlen))
83                return ((struct hostent *)NULL);
84
85        /* avoid potential memory leak */
86        bcopy((char *)result, (char *)&ypbuf, resultlen);
87        ypbuf[resultlen] = '\0';
88        free(result);
89        result = (char *)&ypbuf;
90
91        if ((cp = index(result, '\n')))
92                *cp = '\0';
93
94        cp = strpbrk(result, " \t");
95        *cp++ = '\0';
96        h.h_addr_list = host_addrs;
97        h.h_addr = hostaddr;
98        *((u_long *)h.h_addr) = inet_addr(result);
99        h.h_length = sizeof(u_long);
100        h.h_addrtype = AF_INET;
101        while (*cp == ' ' || *cp == '\t')
102                cp++;
103        h.h_name = cp;
104        q = h.h_aliases = host_aliases;
105        cp = strpbrk(cp, " \t");
106        if (cp != NULL)
107                *cp++ = '\0';
108        while (cp && *cp) {
109                if (*cp == ' ' || *cp == '\t') {
110                        cp++;
111                        continue;
112                }
113                if (q < &host_aliases[MAXALIASES - 1])
114                        *q++ = cp;
115                cp = strpbrk(cp, " \t");
116                if (cp != NULL)
117                        *cp++ = '\0';
118        }
119        *q = NULL;
120        return (&h);
121#else
122        return (NULL);
123#endif /* YP */
124}
125
126struct hostent *
127_gethostbynisname(
128        const char *name,
129        int af)
130{
131        return _gethostbynis(name, "hosts.byname", af);
132}
133
134struct hostent *
135_gethostbynisaddr(
136        const char *addr,
137        int len,
138        int af)
139{
140        return _gethostbynis(inet_ntoa(*(struct in_addr *)addr),"hosts.byaddr", af);
141}
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