| 1 | /*
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| 2 | * Copyright (c) 1985, 1989, 1993
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| 3 | * The Regents of the University of California. All rights reserved.
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| 4 | *
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| 5 | * Portions copyright (c) 1999, 2000
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| 6 | * Intel Corporation.
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| 7 | * All rights reserved.
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| 8 | *
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| 9 | * Redistribution and use in source and binary forms, with or without
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| 10 | * modification, are permitted provided that the following conditions
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| 11 | * are met:
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| 12 | *
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| 13 | * 1. Redistributions of source code must retain the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer.
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| 15 | *
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| 16 | * 2. Redistributions in binary form must reproduce the above copyright
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| 17 | * notice, this list of conditions and the following disclaimer in the
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| 18 | * documentation and/or other materials provided with the distribution.
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| 19 | *
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| 20 | * 3. All advertising materials mentioning features or use of this software
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| 21 | * must display the following acknowledgement:
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| 22 | *
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| 23 | * This product includes software developed by the University of
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| 24 | * California, Berkeley, Intel Corporation, and its contributors.
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| 25 | *
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| 26 | * 4. Neither the name of University, Intel Corporation, or their respective
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| 27 | * contributors may be used to endorse or promote products derived from
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| 28 | * this software without specific prior written permission.
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| 29 | *
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| 30 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS, INTEL CORPORATION AND
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| 31 | * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
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| 32 | * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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| 33 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS,
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| 34 | * INTEL CORPORATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 35 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 36 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 37 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 38 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 39 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 40 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 41 | *
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| 42 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 43 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 44 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 45 | * SUCH DAMAGE.
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| 46 | */
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| 47 |
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| 48 | /*
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| 49 | * Portions Copyright (c) 1993 by Digital Equipment Corporation.
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| 50 | *
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| 51 | * Permission to use, copy, modify, and distribute this software for any
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| 52 | * purpose with or without fee is hereby granted, provided that the above
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| 53 | * copyright notice and this permission notice appear in all copies, and that
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| 54 | * the name of Digital Equipment Corporation not be used in advertising or
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| 55 | * publicity pertaining to distribution of the document or software without
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| 56 | * specific, written prior permission.
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| 57 | *
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| 58 | * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
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| 59 | * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
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| 60 | * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
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| 61 | * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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| 62 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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| 63 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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| 64 | * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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| 65 | * SOFTWARE.
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| 66 | */
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| 67 |
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| 68 | /*
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| 69 | * Portions Copyright (c) 1996 by Internet Software Consortium.
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| 70 | *
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| 71 | * Permission to use, copy, modify, and distribute this software for any
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| 72 | * purpose with or without fee is hereby granted, provided that the above
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| 73 | * copyright notice and this permission notice appear in all copies.
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| 74 | *
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| 75 | * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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| 76 | * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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| 77 | * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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| 78 | * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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| 79 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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| 80 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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| 81 | * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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| 82 | * SOFTWARE.
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| 83 | */
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| 84 |
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| 85 | #if defined(LIBC_SCCS) && !defined(lint)
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| 86 | static char sccsid[] = "@(#)res_init.c 8.1 (Berkeley) 6/7/93";
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| 87 | static char orig_rcsid[] = "From: Id: res_init.c,v 8.7 1996/11/18 09:10:04 vixie Exp $";
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| 88 | static char rcsid[] = "$Id: res_init.c,v 1.1.1.1 2003/11/19 01:51:37 kyu3 Exp $";
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| 89 | #endif /* LIBC_SCCS and not lint */
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| 90 |
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| 91 | #include <sys/types.h>
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| 92 | #include <sys/param.h>
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| 93 | #include <sys/socket.h>
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| 94 | #include <sys/time.h>
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| 95 | #include <netinet/in.h>
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| 96 | #include <arpa/inet.h>
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| 97 | #include <arpa/nameser.h>
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| 98 | #include <ctype.h>
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| 99 | #include <resolv.h>
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| 100 | #include <stdio.h>
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| 101 | #include <stdlib.h>
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| 102 | #include <string.h>
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| 103 | #include <unistd.h>
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| 104 |
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| 105 | #include "res_config.h"
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| 106 |
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| 107 | static void res_setoptions __P((char *, char *));
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| 108 |
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| 109 | #ifdef RESOLVSORT
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| 110 | static const char sort_mask[] = "/&";
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| 111 | #define ISSORTMASK(ch) (strchr(sort_mask, ch) != NULL)
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| 112 | static u_int32_t net_mask __P((struct in_addr));
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| 113 | #endif
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| 114 |
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| 115 | #if !defined(isascii) /* XXX - could be a function */
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| 116 | # define isascii(c) (!(c & 0200))
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| 117 | #endif
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| 118 |
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| 119 | /*
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| 120 | * Resolver state default settings.
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| 121 | */
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| 122 |
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| 123 | struct __res_state _res
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| 124 | # if defined(__BIND_RES_TEXT)
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| 125 | = { RES_TIMEOUT, } /* Motorola, et al. */
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| 126 | # endif
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| 127 | ;
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| 128 |
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| 129 |
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| 130 | /*
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| 131 | * Set up default settings. If the configuration file exist, the values
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| 132 | * there will have precedence. Otherwise, the server address is set to
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| 133 | * INADDR_ANY and the default domain name comes from the gethostname().
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| 134 | *
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| 135 | * An interrim version of this code (BIND 4.9, pre-4.4BSD) used 127.0.0.1
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| 136 | * rather than INADDR_ANY ("0.0.0.0") as the default name server address
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| 137 | * since it was noted that INADDR_ANY actually meant ``the first interface
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| 138 | * you "ifconfig"'d at boot time'' and if this was a SLIP or PPP interface,
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| 139 | * it had to be "up" in order for you to reach your own name server. It
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| 140 | * was later decided that since the recommended practice is to always
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| 141 | * install local static routes through 127.0.0.1 for all your network
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| 142 | * interfaces, that we could solve this problem without a code change.
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| 143 | *
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| 144 | * The configuration file should always be used, since it is the only way
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| 145 | * to specify a default domain. If you are running a server on your local
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| 146 | * machine, you should say "nameserver 0.0.0.0" or "nameserver 127.0.0.1"
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| 147 | * in the configuration file.
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| 148 | *
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| 149 | * Return 0 if completes successfully, -1 on error
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| 150 | */
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| 151 | int
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| 152 | res_init()
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| 153 | {
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| 154 | register FILE *fp;
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| 155 | register char *cp, **pp;
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| 156 | register int n;
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| 157 | char buf[MAXDNAME];
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| 158 | int nserv = 0; /* number of nameserver records read from file */
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| 159 | int haveenv = 0;
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| 160 | int havesearch = 0;
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| 161 | #ifdef RESOLVSORT
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| 162 | int nsort = 0;
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| 163 | char *net;
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| 164 | #endif
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| 165 | #ifndef RFC1535
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| 166 | int dots;
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| 167 | #endif
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| 168 |
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| 169 | /*
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| 170 | * These three fields used to be statically initialized. This made
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| 171 | * it hard to use this code in a shared library. It is necessary,
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| 172 | * now that we're doing dynamic initialization here, that we preserve
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| 173 | * the old semantics: if an application modifies one of these three
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| 174 | * fields of _res before res_init() is called, res_init() will not
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| 175 | * alter them. Of course, if an application is setting them to
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| 176 | * _zero_ before calling res_init(), hoping to override what used
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| 177 | * to be the static default, we can't detect it and unexpected results
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| 178 | * will follow. Zero for any of these fields would make no sense,
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| 179 | * so one can safely assume that the applications were already getting
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| 180 | * unexpected results.
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| 181 | *
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| 182 | * _res.options is tricky since some apps were known to diddle the bits
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| 183 | * before res_init() was first called. We can't replicate that semantic
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| 184 | * with dynamic initialization (they may have turned bits off that are
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| 185 | * set in RES_DEFAULT). Our solution is to declare such applications
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| 186 | * "broken". They could fool us by setting RES_INIT but none do (yet).
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| 187 | */
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| 188 | if (!_res.retrans)
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| 189 | _res.retrans = RES_TIMEOUT;
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| 190 | if (!_res.retry)
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| 191 | _res.retry = 4;
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| 192 | if (!(_res.options & RES_INIT))
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| 193 | _res.options = RES_DEFAULT;
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| 194 |
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| 195 | /*
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| 196 | * This one used to initialize implicitly to zero, so unless the app
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| 197 | * has set it to something in particular, we can randomize it now.
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| 198 | */
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| 199 | if (!_res.id)
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| 200 | _res.id = (u_short)res_randomid();
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| 201 |
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| 202 | #ifdef USELOOPBACK
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| 203 | _res.nsaddr.sin_addr = inet_makeaddr(IN_LOOPBACKNET, 1);
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| 204 | #else
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| 205 | _res.nsaddr.sin_addr.s_addr = INADDR_ANY;
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| 206 | #endif
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| 207 | _res.nsaddr.sin_family = AF_INET;
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| 208 | _res.nsaddr.sin_port = htons(NAMESERVER_PORT);
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| 209 | _res.nscount = 1;
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| 210 | _res.ndots = 1;
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| 211 | _res.pfcode = 0;
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| 212 |
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| 213 | /* Allow user to override the local domain definition */
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| 214 | #ifdef _ORG_FREEBSD_
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| 215 | if (issetugid() == 0 && (cp = getenv("LOCALDOMAIN")) != NULL)
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| 216 | #else
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| 217 | if ((cp = getenv("LOCALDOMAIN")) != NULL)
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| 218 | #endif
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| 219 | {
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| 220 | (void)strncpy(_res.defdname, cp, sizeof(_res.defdname) - 1);
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| 221 | _res.defdname[sizeof(_res.defdname) - 1] = '\0';
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| 222 | haveenv++;
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| 223 |
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| 224 | /*
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| 225 | * Set search list to be blank-separated strings
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| 226 | * from rest of env value. Permits users of LOCALDOMAIN
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| 227 | * to still have a search list, and anyone to set the
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| 228 | * one that they want to use as an individual (even more
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| 229 | * important now that the rfc1535 stuff restricts searches)
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| 230 | */
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| 231 | cp = _res.defdname;
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| 232 | pp = _res.dnsrch;
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| 233 | *pp++ = cp;
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| 234 | for (n = 0; *cp && pp < _res.dnsrch + MAXDNSRCH; cp++) {
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| 235 | if (*cp == '\n') /* silly backwards compat */
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| 236 | break;
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| 237 | else if (*cp == ' ' || *cp == '\t') {
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| 238 | *cp = 0;
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| 239 | n = 1;
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| 240 | } else if (n) {
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| 241 | *pp++ = cp;
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| 242 | n = 0;
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| 243 | havesearch = 1;
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| 244 | }
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| 245 | }
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| 246 | /* null terminate last domain if there are excess */
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| 247 | while (*cp != '\0' && *cp != ' ' && *cp != '\t' && *cp != '\n')
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| 248 | cp++;
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| 249 | *cp = '\0';
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| 250 | *pp++ = 0;
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| 251 | }
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| 252 |
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| 253 | #define MATCH(line, name) \
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| 254 | (!strncmp(line, name, sizeof(name) - 1) && \
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| 255 | (line[sizeof(name) - 1] == ' ' || \
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| 256 | line[sizeof(name) - 1] == '\t'))
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| 257 |
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| 258 | if ((fp = fopen(_PATH_RESCONF, "r")) != NULL) {
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| 259 | /* read the config file */
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| 260 | while (fgets(buf, sizeof(buf), fp) != NULL) {
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| 261 | /* skip comments */
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| 262 | if (*buf == ';' || *buf == '#')
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| 263 | continue;
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| 264 | /* read default domain name */
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| 265 | if (MATCH(buf, "domain")) {
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| 266 | if (haveenv) /* skip if have from environ */
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| 267 | continue;
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| 268 | cp = buf + sizeof("domain") - 1;
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| 269 | while (*cp == ' ' || *cp == '\t')
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| 270 | cp++;
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| 271 | if ((*cp == '\0') || (*cp == '\n'))
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| 272 | continue;
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| 273 | strncpy(_res.defdname, cp, sizeof(_res.defdname) - 1);
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| 274 | _res.defdname[sizeof(_res.defdname) - 1] = '\0';
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| 275 | if ((cp = strpbrk(_res.defdname, " \t\n")) != NULL)
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| 276 | *cp = '\0';
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| 277 | havesearch = 0;
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| 278 | continue;
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| 279 | }
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| 280 | /* set search list */
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| 281 | if (MATCH(buf, "search")) {
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| 282 | if (haveenv) /* skip if have from environ */
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| 283 | continue;
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| 284 | cp = buf + sizeof("search") - 1;
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| 285 | while (*cp == ' ' || *cp == '\t')
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| 286 | cp++;
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| 287 | if ((*cp == '\0') || (*cp == '\n'))
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| 288 | continue;
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| 289 | strncpy(_res.defdname, cp, sizeof(_res.defdname) - 1);
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| 290 | _res.defdname[sizeof(_res.defdname) - 1] = '\0';
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| 291 | if ((cp = strchr(_res.defdname, '\n')) != NULL)
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| 292 | *cp = '\0';
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| 293 | /*
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| 294 | * Set search list to be blank-separated strings
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| 295 | * on rest of line.
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| 296 | */
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| 297 | cp = _res.defdname;
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| 298 | pp = _res.dnsrch;
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| 299 | *pp++ = cp;
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| 300 | for (n = 0; *cp && pp < _res.dnsrch + MAXDNSRCH; cp++) {
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| 301 | if (*cp == ' ' || *cp == '\t') {
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| 302 | *cp = 0;
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| 303 | n = 1;
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| 304 | } else if (n) {
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| 305 | *pp++ = cp;
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| 306 | n = 0;
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| 307 | }
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| 308 | }
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| 309 | /* null terminate last domain if there are excess */
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| 310 | while (*cp != '\0' && *cp != ' ' && *cp != '\t')
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| 311 | cp++;
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| 312 | *cp = '\0';
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| 313 | *pp++ = 0;
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| 314 | havesearch = 1;
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| 315 | continue;
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| 316 | }
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| 317 | /* read nameservers to query */
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| 318 | if (MATCH(buf, "nameserver") && nserv < MAXNS) {
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| 319 | struct in_addr a;
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| 320 |
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| 321 | cp = buf + sizeof("nameserver") - 1;
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| 322 | while (*cp == ' ' || *cp == '\t')
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| 323 | cp++;
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| 324 | if ((*cp != '\0') && (*cp != '\n') && inet_aton(cp, &a)) {
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| 325 | _res.nsaddr_list[nserv].sin_addr = a;
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| 326 | _res.nsaddr_list[nserv].sin_family = AF_INET;
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| 327 | _res.nsaddr_list[nserv].sin_port =
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| 328 | htons(NAMESERVER_PORT);
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| 329 | nserv++;
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| 330 | }
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| 331 | continue;
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| 332 | }
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| 333 | #ifdef RESOLVSORT
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| 334 | if (MATCH(buf, "sortlist")) {
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| 335 | struct in_addr a;
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| 336 |
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| 337 | cp = buf + sizeof("sortlist") - 1;
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| 338 | while (nsort < MAXRESOLVSORT) {
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| 339 | while (*cp == ' ' || *cp == '\t')
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| 340 | cp++;
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| 341 | if (*cp == '\0' || *cp == '\n' || *cp == ';')
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| 342 | break;
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| 343 | net = cp;
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| 344 | while (*cp && !ISSORTMASK(*cp) && *cp != ';' &&
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| 345 | isascii(*cp) && !isspace(*cp))
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| 346 | cp++;
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| 347 | n = *cp;
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| 348 | *cp = 0;
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| 349 | if (inet_aton(net, &a)) {
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| 350 | _res.sort_list[nsort].addr = a;
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| 351 | if (ISSORTMASK(n)) {
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| 352 | *cp++ = (char)n;
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| 353 | net = cp;
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| 354 | while (*cp && *cp != ';' &&
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| 355 | isascii(*cp) && !isspace(*cp))
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| 356 | cp++;
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| 357 | n = *cp;
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| 358 | *cp = 0;
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| 359 | if (inet_aton(net, &a)) {
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| 360 | _res.sort_list[nsort].mask = a.s_addr;
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| 361 | } else {
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| 362 | _res.sort_list[nsort].mask =
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| 363 | net_mask(_res.sort_list[nsort].addr);
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| 364 | }
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| 365 | } else {
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| 366 | _res.sort_list[nsort].mask =
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| 367 | net_mask(_res.sort_list[nsort].addr);
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| 368 | }
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| 369 | nsort++;
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| 370 | }
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| 371 | *cp = (char)n;
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| 372 | }
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| 373 | continue;
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| 374 | }
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| 375 | #endif
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| 376 | if (MATCH(buf, "options")) {
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| 377 | res_setoptions(buf + sizeof("options") - 1, "conf");
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| 378 | continue;
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| 379 | }
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| 380 | }
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| 381 | if (nserv > 1)
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| 382 | _res.nscount = nserv;
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| 383 | #ifdef RESOLVSORT
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| 384 | _res.nsort = nsort;
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| 385 | #endif
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| 386 | (void) fclose(fp);
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| 387 | }
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| 388 | if (_res.defdname[0] == 0 &&
|
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| 389 | gethostname(buf, sizeof(_res.defdname) - 1) == 0 &&
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| 390 | (cp = strchr(buf, '.')) != NULL)
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| 391 | strcpy(_res.defdname, cp + 1);
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| 392 |
|
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| 393 | /* find components of local domain that might be searched */
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| 394 | if (havesearch == 0) {
|
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| 395 | pp = _res.dnsrch;
|
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| 396 | *pp++ = _res.defdname;
|
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| 397 | *pp = NULL;
|
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| 398 |
|
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| 399 | #ifndef RFC1535
|
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| 400 | dots = 0;
|
|---|
| 401 | for (cp = _res.defdname; *cp; cp++)
|
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| 402 | dots += (*cp == '.');
|
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| 403 |
|
|---|
| 404 | cp = _res.defdname;
|
|---|
| 405 | while (pp < _res.dnsrch + MAXDFLSRCH) {
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| 406 | if (dots < LOCALDOMAINPARTS)
|
|---|
| 407 | break;
|
|---|
| 408 | cp = strchr(cp, '.') + 1; /* we know there is one */
|
|---|
| 409 | *pp++ = cp;
|
|---|
| 410 | dots--;
|
|---|
| 411 | }
|
|---|
| 412 | *pp = NULL;
|
|---|
| 413 | #ifdef DEBUG
|
|---|
| 414 | if (_res.options & RES_DEBUG) {
|
|---|
| 415 | printf(";; res_init()... default dnsrch list:\n");
|
|---|
| 416 | for (pp = _res.dnsrch; *pp; pp++)
|
|---|
| 417 | printf(";;\t%s\n", *pp);
|
|---|
| 418 | printf(";;\t..END..\n");
|
|---|
| 419 | }
|
|---|
| 420 | #endif
|
|---|
| 421 | #endif /* !RFC1535 */
|
|---|
| 422 | }
|
|---|
| 423 |
|
|---|
| 424 | #ifdef _ORG_FREEBSD_
|
|---|
| 425 | if (issetugid())
|
|---|
| 426 | #else
|
|---|
| 427 | if (1)
|
|---|
| 428 | #endif
|
|---|
| 429 | _res.options |= RES_NOALIASES;
|
|---|
| 430 | else if ((cp = getenv("RES_OPTIONS")) != NULL)
|
|---|
| 431 | res_setoptions(cp, "env");
|
|---|
| 432 | _res.options |= RES_INIT;
|
|---|
| 433 | if ( 0 == nserv ) {
|
|---|
| 434 | return -1;
|
|---|
| 435 | }
|
|---|
| 436 | return (0);
|
|---|
| 437 | }
|
|---|
| 438 |
|
|---|
| 439 | static void
|
|---|
| 440 | res_setoptions(
|
|---|
| 441 | char *options,
|
|---|
| 442 | char *source
|
|---|
| 443 | )
|
|---|
| 444 | {
|
|---|
| 445 | char *cp = options;
|
|---|
| 446 | int i;
|
|---|
| 447 |
|
|---|
| 448 | #ifdef DEBUG
|
|---|
| 449 | if (_res.options & RES_DEBUG)
|
|---|
| 450 | printf(";; res_setoptions(\"%s\", \"%s\")...\n",
|
|---|
| 451 | options, source);
|
|---|
| 452 | #endif
|
|---|
| 453 | while (*cp) {
|
|---|
| 454 | /* skip leading and inner runs of spaces */
|
|---|
| 455 | while (*cp == ' ' || *cp == '\t')
|
|---|
| 456 | cp++;
|
|---|
| 457 | /* search for and process individual options */
|
|---|
| 458 | if (!strncmp(cp, "ndots:", sizeof("ndots:") - 1)) {
|
|---|
| 459 | i = atoi(cp + sizeof("ndots:") - 1);
|
|---|
| 460 | if (i <= RES_MAXNDOTS)
|
|---|
| 461 | _res.ndots = i;
|
|---|
| 462 | else
|
|---|
| 463 | _res.ndots = RES_MAXNDOTS;
|
|---|
| 464 | #ifdef DEBUG
|
|---|
| 465 | if (_res.options & RES_DEBUG)
|
|---|
| 466 | printf(";;\tndots=%d\n", _res.ndots);
|
|---|
| 467 | #endif
|
|---|
| 468 | } else if (!strncmp(cp, "debug", sizeof("debug") - 1)) {
|
|---|
| 469 | #ifdef DEBUG
|
|---|
| 470 | if (!(_res.options & RES_DEBUG)) {
|
|---|
| 471 | printf(";; res_setoptions(\"%s\", \"%s\")..\n",
|
|---|
| 472 | options, source);
|
|---|
| 473 | _res.options |= RES_DEBUG;
|
|---|
| 474 | }
|
|---|
| 475 | printf(";;\tdebug\n");
|
|---|
| 476 | #endif
|
|---|
| 477 | } else if (!strncmp(cp, "inet6", sizeof("inet6") - 1)) {
|
|---|
| 478 | _res.options |= RES_USE_INET6;
|
|---|
| 479 | } else if (!strncmp(cp, "no_tld_query", sizeof("no_tld_query") - 1)) {
|
|---|
| 480 | _res.options |= RES_NOTLDQUERY;
|
|---|
| 481 | } else {
|
|---|
| 482 | /* XXX - print a warning here? */
|
|---|
| 483 | }
|
|---|
| 484 | /* skip to next run of spaces */
|
|---|
| 485 | while (*cp && *cp != ' ' && *cp != '\t')
|
|---|
| 486 | cp++;
|
|---|
| 487 | }
|
|---|
| 488 | }
|
|---|
| 489 |
|
|---|
| 490 | #ifdef RESOLVSORT
|
|---|
| 491 | /* XXX - should really support CIDR which means explicit masks always. */
|
|---|
| 492 | static u_int32_t
|
|---|
| 493 | net_mask(
|
|---|
| 494 | struct in_addr in
|
|---|
| 495 | )
|
|---|
| 496 | {
|
|---|
| 497 | register u_int32_t i = ntohl(in.s_addr);
|
|---|
| 498 |
|
|---|
| 499 | if (IN_CLASSA(i))
|
|---|
| 500 | return (htonl(IN_CLASSA_NET));
|
|---|
| 501 | else if (IN_CLASSB(i))
|
|---|
| 502 | return (htonl(IN_CLASSB_NET));
|
|---|
| 503 | return (htonl(IN_CLASSC_NET));
|
|---|
| 504 | }
|
|---|
| 505 | #endif
|
|---|
| 506 |
|
|---|
| 507 | u_int
|
|---|
| 508 | res_randomid()
|
|---|
| 509 | {
|
|---|
| 510 | struct timeval now;
|
|---|
| 511 |
|
|---|
| 512 | gettimeofday(&now, NULL);
|
|---|
| 513 | return (0xffff & (now.tv_sec ^ now.tv_usec /* ^ getpid() */));
|
|---|
| 514 | }
|
|---|
