source: rtems/cpukit/libnetworking/libc/gethostbyht.c @ cb2f320

4.104.114.84.95
Last change on this file since cb2f320 was cb2f320, checked in by Joel Sherrill <joel.sherrill@…>, on Mar 5, 2004 at 6:02:41 PM

2004-03-05 Joel Sherrill <joel@…>

  • libblock/src/bdbuf.c, libblock/src/ramdisk.c, libcsupport/src/newlibc.c, libcsupport/src/sync.c, libmisc/cpuuse/cpuuse.c, libmisc/monitor/mon-symbols.c, libmisc/shell/cmds.c, libmisc/shell/shell.c, libnetworking/kern/kern_sysctl.c, libnetworking/lib/ftpfs.c, libnetworking/lib/tftpDriver.c, libnetworking/libc/gethostbydns.c, libnetworking/libc/gethostbyht.c, libnetworking/libc/gethostnamadr.c, libnetworking/libc/getnetbyht.c, libnetworking/libc/getnetnamadr.c, libnetworking/libc/inet_addr.c, libnetworking/libc/linkaddr.c, libnetworking/libc/map_v4v6.c, libnetworking/libc/ns_print.c, libnetworking/libc/ns_ttl.c, libnetworking/libc/nsap_addr.c, libnetworking/libc/rcmd.c, libnetworking/libc/res_debug.c, libnetworking/libc/res_mkupdate.c, libnetworking/libc/res_query.c, libnetworking/libc/res_send.c, libnetworking/libc/res_update.c, libnetworking/net/radix.c, libnetworking/rtems/mkrootfs.c, librpc/src/rpc/clnt_perror.c, librpc/src/rpc/svc.c, score/macros/rtems/score/chain.inl, score/src/objectidtoname.c: Too much was accidentally committed -- revert.
  • Property mode set to 100644
File size: 5.7 KB
Line 
1/*-
2 * Copyright (c) 1985, 1988, 1993
3 *      The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *      This product includes software developed by the University of
16 *      California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 * -
33 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
34 *
35 * Permission to use, copy, modify, and distribute this software for any
36 * purpose with or without fee is hereby granted, provided that the above
37 * copyright notice and this permission notice appear in all copies, and that
38 * the name of Digital Equipment Corporation not be used in advertising or
39 * publicity pertaining to distribution of the document or software without
40 * specific, written prior permission.
41 *
42 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
43 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
44 * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
45 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
46 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
47 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
48 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
49 * SOFTWARE.
50 * -
51 * --Copyright--
52 */
53
54#if defined(LIBC_SCCS) && !defined(lint)
55static char sccsid[] = "@(#)gethostnamadr.c     8.1 (Berkeley) 6/4/93";
56static char rcsid[] = "$Id$";
57#endif /* LIBC_SCCS and not lint */
58
59#include <sys/param.h>
60#include <sys/socket.h>
61#include <netinet/in.h>
62#include <arpa/inet.h>
63#include <netdb.h>
64#include <stdio.h>
65#include <ctype.h>
66#include <errno.h>
67#include <string.h>
68#include <arpa/nameser.h>       /* XXX */
69#include <resolv.h>             /* XXX */
70
71#define MAXALIASES      35
72
73static struct hostent host;
74static char *host_aliases[MAXALIASES];
75static char hostbuf[BUFSIZ+1];
76static FILE *hostf = NULL;
77static u_char host_addr[16];    /* IPv4 or IPv6 */
78static char *h_addr_ptrs[2];
79static int stayopen = 0;
80
81void
82_sethosthtent(f)
83        int f;
84{
85        if (!hostf)
86                hostf = fopen(_PATH_HOSTS, "r" );
87        else
88                rewind(hostf);
89        stayopen = f;
90}
91
92void
93_endhosthtent()
94{
95        if (hostf && !stayopen) {
96                (void) fclose(hostf);
97                hostf = NULL;
98        }
99}
100
101struct hostent *
102gethostent()
103{
104        char *p;
105        register char *cp, **q;
106        int af, len;
107
108        if (!hostf && !(hostf = fopen(_PATH_HOSTS, "r" ))) {
109                h_errno = NETDB_INTERNAL;
110                return (NULL);
111        }
112 again:
113        if (!(p = fgets(hostbuf, sizeof hostbuf, hostf))) {
114                h_errno = HOST_NOT_FOUND;
115                return (NULL);
116        }
117        if (*p == '#')
118                goto again;
119        if (!(cp = strpbrk(p, "#\n")))
120                goto again;
121        *cp = '\0';
122        if (!(cp = strpbrk(p, " \t")))
123                goto again;
124        *cp++ = '\0';
125        if (inet_pton(AF_INET6, p, host_addr) > 0) {
126                af = AF_INET6;
127                len = IN6ADDRSZ;
128        } else if (inet_pton(AF_INET, p, host_addr) > 0) {
129                if (_res.options & RES_USE_INET6) {
130                        _map_v4v6_address((char*)host_addr, (char*)host_addr);
131                        af = AF_INET6;
132                        len = IN6ADDRSZ;
133                } else {
134                        af = AF_INET;
135                        len = INADDRSZ;
136                }
137        } else {
138                goto again;
139        }
140        h_addr_ptrs[0] = (char *)host_addr;
141        h_addr_ptrs[1] = NULL;
142        host.h_addr_list = h_addr_ptrs;
143        host.h_length = len;
144        host.h_addrtype = af;
145        while (*cp == ' ' || *cp == '\t')
146                cp++;
147        host.h_name = cp;
148        q = host.h_aliases = host_aliases;
149        if ((cp = strpbrk(cp, " \t")) != NULL)
150                *cp++ = '\0';
151        while (cp && *cp) {
152                if (*cp == ' ' || *cp == '\t') {
153                        cp++;
154                        continue;
155                }
156                if (q < &host_aliases[MAXALIASES - 1])
157                        *q++ = cp;
158                if ((cp = strpbrk(cp, " \t")) != NULL)
159                        *cp++ = '\0';
160        }
161        *q = NULL;
162        h_errno = NETDB_SUCCESS;
163        return (&host);
164}
165
166struct hostent *
167_gethostbyhtname(name, af)
168        const char *name;
169        int af;
170{
171        register struct hostent *p;
172        register char **cp;
173       
174        sethostent(0);
175        while ((p = gethostent()) != NULL) {
176                if (p->h_addrtype != af)
177                        continue;
178                if (strcasecmp(p->h_name, name) == 0)
179                        break;
180                for (cp = p->h_aliases; *cp != 0; cp++)
181                        if (strcasecmp(*cp, name) == 0)
182                                goto found;
183        }
184found:
185        endhostent();
186        return (p);
187}
188
189struct hostent *
190_gethostbyhtaddr(addr, len, af)
191        const char *addr;
192        int len, af;
193{
194        register struct hostent *p;
195
196        sethostent(0);
197        while ((p = gethostent()) != NULL)
198                if (p->h_addrtype == af && !bcmp(p->h_addr, addr, len))
199                        break;
200        endhostent();
201        return (p);
202}
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