1d7ce700605e1af0e455e31ec11f19ff21d26b525darylm/*- 2d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * Copyright (c) 1985, 1988, 1993 3d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * The Regents of the University of California. All rights reserved. 4d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * 5d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * Portions copyright (c) 1999, 2000 6d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * Intel Corporation. 7d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * All rights reserved. 8d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * 9d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * Redistribution and use in source and binary forms, with or without 10d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * modification, are permitted provided that the following conditions 11d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * are met: 12d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * 13d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * 1. Redistributions of source code must retain the above copyright 14d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * notice, this list of conditions and the following disclaimer. 15d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * 16d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * 2. Redistributions in binary form must reproduce the above copyright 17d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * notice, this list of conditions and the following disclaimer in the 18d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * documentation and/or other materials provided with the distribution. 19d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * 20d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * 3. All advertising materials mentioning features or use of this software 21d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * must display the following acknowledgement: 22d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * 23d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * This product includes software developed by the University of 24d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * California, Berkeley, Intel Corporation, and its contributors. 25d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * 26d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * 4. Neither the name of University, Intel Corporation, or their respective 27d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * contributors may be used to endorse or promote products derived from 28d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * this software without specific prior written permission. 29d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * 30d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * THIS SOFTWARE IS PROVIDED BY THE REGENTS, INTEL CORPORATION AND 31d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, 32d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 33d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS, 34d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * INTEL CORPORATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 35d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 36d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 37d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 38d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 39d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 40d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 41d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * - 42d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * Portions Copyright (c) 1993 by Digital Equipment Corporation. 43d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * 44d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * Permission to use, copy, modify, and distribute this software for any 45d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * purpose with or without fee is hereby granted, provided that the above 46d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * copyright notice and this permission notice appear in all copies, and that 47d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * the name of Digital Equipment Corporation not be used in advertising or 48d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * publicity pertaining to distribution of the document or software without 49d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * specific, written prior permission. 50d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * 51d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 52d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 53d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 54d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 55d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 56d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 57d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 58d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * SOFTWARE. 59d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * - 60d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * --Copyright-- 61d7ce700605e1af0e455e31ec11f19ff21d26b525darylm */ 62d7ce700605e1af0e455e31ec11f19ff21d26b525darylm/* Portions Copyright (c) 1993 Carlos Leandro and Rui Salgueiro 63d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * Dep. Matematica Universidade de Coimbra, Portugal, Europe 64d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * 65d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * Permission to use, copy, modify, and distribute this software for any 66d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * purpose with or without fee is hereby granted, provided that the above 67d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * copyright notice and this permission notice appear in all copies. 68d7ce700605e1af0e455e31ec11f19ff21d26b525darylm */ 69d7ce700605e1af0e455e31ec11f19ff21d26b525darylm 70d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#if defined(LIBC_SCCS) && !defined(lint) 71d7ce700605e1af0e455e31ec11f19ff21d26b525darylmstatic char sccsid[] = "@(#)gethostnamadr.c 8.1 (Berkeley) 6/4/93"; 72d7ce700605e1af0e455e31ec11f19ff21d26b525darylmstatic char rcsid[] = "$Id: getnetbydns.c,v 1.1.1.1 2003/11/19 01:51:27 kyu3 Exp $"; 73d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#endif /* LIBC_SCCS and not lint */ 74d7ce700605e1af0e455e31ec11f19ff21d26b525darylm 75d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#include <sys/param.h> 76d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#include <sys/socket.h> 77d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#include <netinet/in.h> 78d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#include <arpa/inet.h> 79d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#include <arpa/nameser.h> 80d7ce700605e1af0e455e31ec11f19ff21d26b525darylm 81d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#include <stdio.h> 82d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#include <netdb.h> 83d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#include <resolv.h> 84d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#include <ctype.h> 85d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#include <errno.h> 86d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#include <string.h> 87d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#include <unistd.h> 88d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#ifdef _ORG_FREEBSD_ 89d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#include <syslog.h> 90d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#endif 91d7ce700605e1af0e455e31ec11f19ff21d26b525darylm 92d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#include "res_config.h" 93d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#include "Socklib_internals.h" 94d7ce700605e1af0e455e31ec11f19ff21d26b525darylm 95d7ce700605e1af0e455e31ec11f19ff21d26b525darylmextern int h_errno; 96d7ce700605e1af0e455e31ec11f19ff21d26b525darylm 97d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#define BYADDR 0 98d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#define BYNAME 1 99d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#define MAXALIASES 35 100d7ce700605e1af0e455e31ec11f19ff21d26b525darylm 101d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#if PACKETSZ > 1024 102d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#define MAXPACKET PACKETSZ 103d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#else 104d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#define MAXPACKET 1024 105d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#endif 106d7ce700605e1af0e455e31ec11f19ff21d26b525darylm 107d7ce700605e1af0e455e31ec11f19ff21d26b525darylmtypedef union { 108d7ce700605e1af0e455e31ec11f19ff21d26b525darylm HEADER hdr; 109d7ce700605e1af0e455e31ec11f19ff21d26b525darylm u_char buf[MAXPACKET]; 110d7ce700605e1af0e455e31ec11f19ff21d26b525darylm} querybuf; 111d7ce700605e1af0e455e31ec11f19ff21d26b525darylm 112d7ce700605e1af0e455e31ec11f19ff21d26b525darylmtypedef union { 113d7ce700605e1af0e455e31ec11f19ff21d26b525darylm long al; 114d7ce700605e1af0e455e31ec11f19ff21d26b525darylm char ac; 115d7ce700605e1af0e455e31ec11f19ff21d26b525darylm} align; 116d7ce700605e1af0e455e31ec11f19ff21d26b525darylm 117d7ce700605e1af0e455e31ec11f19ff21d26b525darylmstatic struct netent * 118d7ce700605e1af0e455e31ec11f19ff21d26b525darylmgetnetanswer(querybuf *answer, int anslen, int net_i) 119d7ce700605e1af0e455e31ec11f19ff21d26b525darylm{ 120d7ce700605e1af0e455e31ec11f19ff21d26b525darylm 121d7ce700605e1af0e455e31ec11f19ff21d26b525darylm register HEADER *hp; 122d7ce700605e1af0e455e31ec11f19ff21d26b525darylm register u_char *cp; 123d7ce700605e1af0e455e31ec11f19ff21d26b525darylm register int n; 124d7ce700605e1af0e455e31ec11f19ff21d26b525darylm u_char *eom; 125d7ce700605e1af0e455e31ec11f19ff21d26b525darylm int type, class, buflen, ancount, qdcount, haveanswer, i, nchar; 126d7ce700605e1af0e455e31ec11f19ff21d26b525darylm char aux1[MAXHOSTNAMELEN], aux2[MAXHOSTNAMELEN], ans[MAXHOSTNAMELEN]; 127d7ce700605e1af0e455e31ec11f19ff21d26b525darylm char *in, *st, *pauxt, *bp, **ap; 128d7ce700605e1af0e455e31ec11f19ff21d26b525darylm char *paux1 = &aux1[0], *paux2 = &aux2[0], flag = 0; 129d7ce700605e1af0e455e31ec11f19ff21d26b525darylmstatic struct netent net_entry; 130d7ce700605e1af0e455e31ec11f19ff21d26b525darylmstatic char *net_aliases[MAXALIASES], netbuf[PACKETSZ]; 131d7ce700605e1af0e455e31ec11f19ff21d26b525darylm 132d7ce700605e1af0e455e31ec11f19ff21d26b525darylm /* 133d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * find first satisfactory answer 134d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * 135d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * answer --> +------------+ ( MESSAGE ) 136d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * | Header | 137d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * +------------+ 138d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * | Question | the question for the name server 139d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * +------------+ 140d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * | Answer | RRs answering the question 141d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * +------------+ 142d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * | Authority | RRs pointing toward an authority 143d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * | Additional | RRs holding additional information 144d7ce700605e1af0e455e31ec11f19ff21d26b525darylm * +------------+ 145d7ce700605e1af0e455e31ec11f19ff21d26b525darylm */ 146d7ce700605e1af0e455e31ec11f19ff21d26b525darylm eom = answer->buf + anslen; 147d7ce700605e1af0e455e31ec11f19ff21d26b525darylm hp = &answer->hdr; 148d7ce700605e1af0e455e31ec11f19ff21d26b525darylm ancount = ntohs(hp->ancount); /* #/records in the answer section */ 149d7ce700605e1af0e455e31ec11f19ff21d26b525darylm qdcount = ntohs(hp->qdcount); /* #/entries in the question section */ 150d7ce700605e1af0e455e31ec11f19ff21d26b525darylm bp = netbuf; 151d7ce700605e1af0e455e31ec11f19ff21d26b525darylm buflen = sizeof(netbuf); 152d7ce700605e1af0e455e31ec11f19ff21d26b525darylm cp = answer->buf + HFIXEDSZ; 153d7ce700605e1af0e455e31ec11f19ff21d26b525darylm if (!qdcount) { 154d7ce700605e1af0e455e31ec11f19ff21d26b525darylm if (hp->aa) 155d7ce700605e1af0e455e31ec11f19ff21d26b525darylm h_errno = HOST_NOT_FOUND; 156d7ce700605e1af0e455e31ec11f19ff21d26b525darylm else 157d7ce700605e1af0e455e31ec11f19ff21d26b525darylm h_errno = TRY_AGAIN; 158d7ce700605e1af0e455e31ec11f19ff21d26b525darylm return (NULL); 159d7ce700605e1af0e455e31ec11f19ff21d26b525darylm } 160d7ce700605e1af0e455e31ec11f19ff21d26b525darylm while (qdcount-- > 0) 161d7ce700605e1af0e455e31ec11f19ff21d26b525darylm cp += __dn_skipname(cp, eom) + QFIXEDSZ; 162d7ce700605e1af0e455e31ec11f19ff21d26b525darylm ap = net_aliases; 163d7ce700605e1af0e455e31ec11f19ff21d26b525darylm *ap = NULL; 164d7ce700605e1af0e455e31ec11f19ff21d26b525darylm net_entry.n_aliases = net_aliases; 165d7ce700605e1af0e455e31ec11f19ff21d26b525darylm haveanswer = 0; 166d7ce700605e1af0e455e31ec11f19ff21d26b525darylm while (--ancount >= 0 && cp < eom) { 167d7ce700605e1af0e455e31ec11f19ff21d26b525darylm n = dn_expand(answer->buf, eom, cp, bp, buflen); 168d7ce700605e1af0e455e31ec11f19ff21d26b525darylm if ((n < 0) || !res_dnok(bp)) 169d7ce700605e1af0e455e31ec11f19ff21d26b525darylm break; 170d7ce700605e1af0e455e31ec11f19ff21d26b525darylm cp += n; 171d7ce700605e1af0e455e31ec11f19ff21d26b525darylm ans[0] = '\0'; 172d7ce700605e1af0e455e31ec11f19ff21d26b525darylm (void)strncpy(&ans[0], bp, sizeof(ans) - 1); 173d7ce700605e1af0e455e31ec11f19ff21d26b525darylm ans[sizeof(ans) - 1] = '\0'; 174d7ce700605e1af0e455e31ec11f19ff21d26b525darylm GETSHORT(type, cp); 175d7ce700605e1af0e455e31ec11f19ff21d26b525darylm GETSHORT(class, cp); 176d7ce700605e1af0e455e31ec11f19ff21d26b525darylm cp += INT32SZ; /* TTL */ 177d7ce700605e1af0e455e31ec11f19ff21d26b525darylm GETSHORT(n, cp); 178d7ce700605e1af0e455e31ec11f19ff21d26b525darylm if (class == C_IN && type == T_PTR) { 179d7ce700605e1af0e455e31ec11f19ff21d26b525darylm n = dn_expand(answer->buf, eom, cp, bp, buflen); 180d7ce700605e1af0e455e31ec11f19ff21d26b525darylm if ((n < 0) || !res_hnok(bp)) { 181d7ce700605e1af0e455e31ec11f19ff21d26b525darylm cp += n; 182d7ce700605e1af0e455e31ec11f19ff21d26b525darylm return (NULL); 183d7ce700605e1af0e455e31ec11f19ff21d26b525darylm } 184d7ce700605e1af0e455e31ec11f19ff21d26b525darylm cp += n; 185d7ce700605e1af0e455e31ec11f19ff21d26b525darylm *ap++ = bp; 186d7ce700605e1af0e455e31ec11f19ff21d26b525darylm bp += strlen(bp) + 1; 187d7ce700605e1af0e455e31ec11f19ff21d26b525darylm net_entry.n_addrtype = 188d7ce700605e1af0e455e31ec11f19ff21d26b525darylm (class == C_IN) ? AF_INET : AF_UNSPEC; 189d7ce700605e1af0e455e31ec11f19ff21d26b525darylm haveanswer++; 190d7ce700605e1af0e455e31ec11f19ff21d26b525darylm } 191d7ce700605e1af0e455e31ec11f19ff21d26b525darylm } 192d7ce700605e1af0e455e31ec11f19ff21d26b525darylm if (haveanswer) { 193d7ce700605e1af0e455e31ec11f19ff21d26b525darylm *ap = NULL; 194d7ce700605e1af0e455e31ec11f19ff21d26b525darylm switch (net_i) { 195d7ce700605e1af0e455e31ec11f19ff21d26b525darylm case BYADDR: 196d7ce700605e1af0e455e31ec11f19ff21d26b525darylm net_entry.n_name = *net_entry.n_aliases; 197d7ce700605e1af0e455e31ec11f19ff21d26b525darylm net_entry.n_net = 0L; 198d7ce700605e1af0e455e31ec11f19ff21d26b525darylm break; 199d7ce700605e1af0e455e31ec11f19ff21d26b525darylm case BYNAME: 200d7ce700605e1af0e455e31ec11f19ff21d26b525darylm in = *net_entry.n_aliases; 201d7ce700605e1af0e455e31ec11f19ff21d26b525darylm net_entry.n_name = &ans[0]; 202d7ce700605e1af0e455e31ec11f19ff21d26b525darylm aux2[0] = '\0'; 203d7ce700605e1af0e455e31ec11f19ff21d26b525darylm for (i = 0; i < 4; i++) { 204d7ce700605e1af0e455e31ec11f19ff21d26b525darylm for (st = in, nchar = 0; 205d7ce700605e1af0e455e31ec11f19ff21d26b525darylm *st != '.'; 206d7ce700605e1af0e455e31ec11f19ff21d26b525darylm st++, nchar++) 207d7ce700605e1af0e455e31ec11f19ff21d26b525darylm ; 208d7ce700605e1af0e455e31ec11f19ff21d26b525darylm if (nchar != 1 || *in != '0' || flag) { 209d7ce700605e1af0e455e31ec11f19ff21d26b525darylm flag = 1; 210d7ce700605e1af0e455e31ec11f19ff21d26b525darylm (void)strncpy(paux1, 211d7ce700605e1af0e455e31ec11f19ff21d26b525darylm (i==0) ? in : in-1, 212d7ce700605e1af0e455e31ec11f19ff21d26b525darylm (i==0) ?nchar : nchar+1); 213d7ce700605e1af0e455e31ec11f19ff21d26b525darylm paux1[(i==0) ? nchar : nchar+1] = '\0'; 214d7ce700605e1af0e455e31ec11f19ff21d26b525darylm pauxt = paux2; 215d7ce700605e1af0e455e31ec11f19ff21d26b525darylm paux2 = strcat(paux1, paux2); 216d7ce700605e1af0e455e31ec11f19ff21d26b525darylm paux1 = pauxt; 217d7ce700605e1af0e455e31ec11f19ff21d26b525darylm } 218d7ce700605e1af0e455e31ec11f19ff21d26b525darylm in = ++st; 219d7ce700605e1af0e455e31ec11f19ff21d26b525darylm } 220d7ce700605e1af0e455e31ec11f19ff21d26b525darylm net_entry.n_net = inet_network(paux2); 221d7ce700605e1af0e455e31ec11f19ff21d26b525darylm break; 222d7ce700605e1af0e455e31ec11f19ff21d26b525darylm } 223d7ce700605e1af0e455e31ec11f19ff21d26b525darylm net_entry.n_aliases++; 224d7ce700605e1af0e455e31ec11f19ff21d26b525darylm return (&net_entry); 225d7ce700605e1af0e455e31ec11f19ff21d26b525darylm } 226d7ce700605e1af0e455e31ec11f19ff21d26b525darylm h_errno = TRY_AGAIN; 227d7ce700605e1af0e455e31ec11f19ff21d26b525darylm return (NULL); 228d7ce700605e1af0e455e31ec11f19ff21d26b525darylm} 229d7ce700605e1af0e455e31ec11f19ff21d26b525darylm 230d7ce700605e1af0e455e31ec11f19ff21d26b525darylmstruct netent * 231d7ce700605e1af0e455e31ec11f19ff21d26b525darylm_getnetbydnsaddr(register unsigned long net, register int net_type) 232d7ce700605e1af0e455e31ec11f19ff21d26b525darylm{ 233d7ce700605e1af0e455e31ec11f19ff21d26b525darylm unsigned int netbr[4]; 234d7ce700605e1af0e455e31ec11f19ff21d26b525darylm int nn, anslen; 235d7ce700605e1af0e455e31ec11f19ff21d26b525darylm querybuf buf; 236d7ce700605e1af0e455e31ec11f19ff21d26b525darylm char qbuf[MAXDNAME]; 237d7ce700605e1af0e455e31ec11f19ff21d26b525darylm unsigned long net2; 238d7ce700605e1af0e455e31ec11f19ff21d26b525darylm struct netent *net_entry; 239d7ce700605e1af0e455e31ec11f19ff21d26b525darylm 240d7ce700605e1af0e455e31ec11f19ff21d26b525darylm if (net_type != AF_INET) 241d7ce700605e1af0e455e31ec11f19ff21d26b525darylm return (NULL); 242d7ce700605e1af0e455e31ec11f19ff21d26b525darylm 243d7ce700605e1af0e455e31ec11f19ff21d26b525darylm for (nn = 4, net2 = net; net2; net2 >>= 8) 244d7ce700605e1af0e455e31ec11f19ff21d26b525darylm netbr[--nn] = net2 & 0xff; 245d7ce700605e1af0e455e31ec11f19ff21d26b525darylm switch (nn) { 246d7ce700605e1af0e455e31ec11f19ff21d26b525darylm case 3: /* Class A */ 247d7ce700605e1af0e455e31ec11f19ff21d26b525darylm sprintf(qbuf, "0.0.0.%u.in-addr.arpa", netbr[3]); 248d7ce700605e1af0e455e31ec11f19ff21d26b525darylm break; 249d7ce700605e1af0e455e31ec11f19ff21d26b525darylm case 2: /* Class B */ 250d7ce700605e1af0e455e31ec11f19ff21d26b525darylm sprintf(qbuf, "0.0.%u.%u.in-addr.arpa", netbr[3], netbr[2]); 251d7ce700605e1af0e455e31ec11f19ff21d26b525darylm break; 252d7ce700605e1af0e455e31ec11f19ff21d26b525darylm case 1: /* Class C */ 253d7ce700605e1af0e455e31ec11f19ff21d26b525darylm sprintf(qbuf, "0.%u.%u.%u.in-addr.arpa", netbr[3], netbr[2], 254d7ce700605e1af0e455e31ec11f19ff21d26b525darylm netbr[1]); 255d7ce700605e1af0e455e31ec11f19ff21d26b525darylm break; 256d7ce700605e1af0e455e31ec11f19ff21d26b525darylm case 0: /* Class D - E */ 257d7ce700605e1af0e455e31ec11f19ff21d26b525darylm sprintf(qbuf, "%u.%u.%u.%u.in-addr.arpa", netbr[3], netbr[2], 258d7ce700605e1af0e455e31ec11f19ff21d26b525darylm netbr[1], netbr[0]); 259d7ce700605e1af0e455e31ec11f19ff21d26b525darylm break; 260d7ce700605e1af0e455e31ec11f19ff21d26b525darylm } 261d7ce700605e1af0e455e31ec11f19ff21d26b525darylm anslen = res_query(qbuf, C_IN, T_PTR, (u_char *)&buf, sizeof(buf)); 262d7ce700605e1af0e455e31ec11f19ff21d26b525darylm if (anslen < 0) { 263d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#ifdef DEBUG 264d7ce700605e1af0e455e31ec11f19ff21d26b525darylm if (_res.options & RES_DEBUG) 265d7ce700605e1af0e455e31ec11f19ff21d26b525darylm printf("res_query failed\n"); 266d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#endif 267d7ce700605e1af0e455e31ec11f19ff21d26b525darylm return (NULL); 268d7ce700605e1af0e455e31ec11f19ff21d26b525darylm } 269d7ce700605e1af0e455e31ec11f19ff21d26b525darylm net_entry = getnetanswer(&buf, anslen, BYADDR); 270d7ce700605e1af0e455e31ec11f19ff21d26b525darylm if (net_entry) { 271d7ce700605e1af0e455e31ec11f19ff21d26b525darylm unsigned u_net = net; /* maybe net should be unsigned ? */ 272d7ce700605e1af0e455e31ec11f19ff21d26b525darylm 273d7ce700605e1af0e455e31ec11f19ff21d26b525darylm /* Strip trailing zeros */ 274d7ce700605e1af0e455e31ec11f19ff21d26b525darylm while ((u_net & 0xff) == 0 && u_net != 0) 275d7ce700605e1af0e455e31ec11f19ff21d26b525darylm u_net >>= 8; 276d7ce700605e1af0e455e31ec11f19ff21d26b525darylm net_entry->n_net = u_net; 277d7ce700605e1af0e455e31ec11f19ff21d26b525darylm return (net_entry); 278d7ce700605e1af0e455e31ec11f19ff21d26b525darylm } 279d7ce700605e1af0e455e31ec11f19ff21d26b525darylm return (NULL); 280d7ce700605e1af0e455e31ec11f19ff21d26b525darylm} 281d7ce700605e1af0e455e31ec11f19ff21d26b525darylm 282d7ce700605e1af0e455e31ec11f19ff21d26b525darylmstruct netent * 283d7ce700605e1af0e455e31ec11f19ff21d26b525darylm_getnetbydnsname(register const char *net) 284d7ce700605e1af0e455e31ec11f19ff21d26b525darylm{ 285d7ce700605e1af0e455e31ec11f19ff21d26b525darylm int anslen; 286d7ce700605e1af0e455e31ec11f19ff21d26b525darylm querybuf buf; 287d7ce700605e1af0e455e31ec11f19ff21d26b525darylm char qbuf[MAXDNAME]; 288d7ce700605e1af0e455e31ec11f19ff21d26b525darylm 289d7ce700605e1af0e455e31ec11f19ff21d26b525darylm if ((_res.options & RES_INIT) == 0 && res_init() == -1) { 290d7ce700605e1af0e455e31ec11f19ff21d26b525darylm h_errno = NETDB_INTERNAL; 291d7ce700605e1af0e455e31ec11f19ff21d26b525darylm return (NULL); 292d7ce700605e1af0e455e31ec11f19ff21d26b525darylm } 293d7ce700605e1af0e455e31ec11f19ff21d26b525darylm strncpy(qbuf, net, sizeof(qbuf) - 1); 294d7ce700605e1af0e455e31ec11f19ff21d26b525darylm qbuf[sizeof(qbuf) - 1] = '\0'; 295d7ce700605e1af0e455e31ec11f19ff21d26b525darylm anslen = res_search(qbuf, C_IN, T_PTR, (u_char *)&buf, sizeof(buf)); 296d7ce700605e1af0e455e31ec11f19ff21d26b525darylm if (anslen < 0) { 297d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#ifdef DEBUG 298d7ce700605e1af0e455e31ec11f19ff21d26b525darylm if (_res.options & RES_DEBUG) 299d7ce700605e1af0e455e31ec11f19ff21d26b525darylm printf("res_query failed\n"); 300d7ce700605e1af0e455e31ec11f19ff21d26b525darylm#endif 301d7ce700605e1af0e455e31ec11f19ff21d26b525darylm return (NULL); 302d7ce700605e1af0e455e31ec11f19ff21d26b525darylm } 303d7ce700605e1af0e455e31ec11f19ff21d26b525darylm return getnetanswer(&buf, anslen, BYNAME); 304d7ce700605e1af0e455e31ec11f19ff21d26b525darylm} 305d7ce700605e1af0e455e31ec11f19ff21d26b525darylm 306d7ce700605e1af0e455e31ec11f19ff21d26b525darylmvoid 307d7ce700605e1af0e455e31ec11f19ff21d26b525darylm_setnetdnsent(int stayopen) 308d7ce700605e1af0e455e31ec11f19ff21d26b525darylm{ 309d7ce700605e1af0e455e31ec11f19ff21d26b525darylm if (stayopen) 310d7ce700605e1af0e455e31ec11f19ff21d26b525darylm _res.options |= RES_STAYOPEN | RES_USEVC; 311d7ce700605e1af0e455e31ec11f19ff21d26b525darylm} 312d7ce700605e1af0e455e31ec11f19ff21d26b525darylm 313d7ce700605e1af0e455e31ec11f19ff21d26b525darylmvoid 314d7ce700605e1af0e455e31ec11f19ff21d26b525darylm_endnetdnsent() 315d7ce700605e1af0e455e31ec11f19ff21d26b525darylm{ 316d7ce700605e1af0e455e31ec11f19ff21d26b525darylm _res.options &= ~(RES_STAYOPEN | RES_USEVC); 317d7ce700605e1af0e455e31ec11f19ff21d26b525darylm res_close(); 318d7ce700605e1af0e455e31ec11f19ff21d26b525darylm} 319