diff options
Diffstat (limited to 'nss/nss_dns/dns-network.c')
| -rw-r--r-- | nss/nss_dns/dns-network.c | 343 |
1 files changed, 0 insertions, 343 deletions
diff --git a/nss/nss_dns/dns-network.c b/nss/nss_dns/dns-network.c deleted file mode 100644 index d91c1bdc82..0000000000 --- a/nss/nss_dns/dns-network.c +++ /dev/null @@ -1,343 +0,0 @@ -/* Copyright (C) 1996 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Extended from original form by Ulrich Drepper <drepper@cygnus.com>, 1996. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -/* Parts of this file are plain copies of the file `getnetnamadr.c' from - the bind package and it has the following copyright. */ - -/* Copyright (c) 1993 Carlos Leandro and Rui Salgueiro - * Dep. Matematica Universidade de Coimbra, Portugal, Europe - * - * Permission to use, copy, modify, and distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - */ -/* - * Copyright (c) 1983, 1993 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <ctype.h> -#include <errno.h> -#include <netdb.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include "nsswitch.h" -#include <arpa/inet.h> - -/* Maximum number of aliases we allow. */ -#define MAX_NR_ALIASES 48 - - -#if PACKETSZ > 1024 -#define MAXPACKET PACKETSZ -#else -#define MAXPACKET 1024 -#endif - - -typedef enum -{ - BYADDR, - BYNAME -} lookup_method; - - -/* We need this time later. */ -typedef union querybuf -{ - HEADER hdr; - u_char buf[MAXPACKET]; -} querybuf; - - -/* Protortypes for local functions. */ -static enum nss_status getanswer_r (const querybuf *answer, int anslen, - struct netent *result, char *buffer, - int buflen, lookup_method net_i); - - -enum nss_status -_nss_dns_getnetbyname_r (const char *name, struct netent *result, - char *buffer, int buflen) -{ - /* Return entry for network with NAME. */ - querybuf net_buffer; - int anslen; - char *qbuf; - - qbuf = strdupa (name); - anslen = res_search (qbuf, C_IN, T_PTR, (u_char *) &net_buffer, - sizeof (querybuf)); - if (anslen < 0) - /* Nothing found. */ - return (errno == ECONNREFUSED - || errno == EPFNOSUPPORT - || errno == EAFNOSUPPORT) - ? NSS_STATUS_UNAVAIL : NSS_STATUS_NOTFOUND; - - return getanswer_r (&net_buffer, anslen, result, buffer, buflen, BYNAME); -} - - -enum nss_status -_nss_dns_getnetbyaddr_r (long net, int type, struct netent *result, - char *buffer, int buflen) -{ - /* Return entry for network with NAME. */ - enum nss_status status; - querybuf net_buffer; - unsigned int net_bytes[4]; - char qbuf[MAXDNAME]; - int cnt, anslen; - u_int32_t net2; - - /* No net address lookup for IPv6 yet. */ - if (type != AF_INET) - return NSS_STATUS_UNAVAIL; - - net2 = (u_int32_t) net; - for (cnt = 4; net2 != 0; net2 >>= 8) - net_bytes[--cnt] = net2 & 0xff; - - switch (cnt) - { - case 3: - /* Class A network. */ - sprintf (qbuf, "0.0.0.%u.in-addr.arpa", net_bytes[3]); - break; - case 2: - /* Class B network. */ - sprintf (qbuf, "0.0.%u.%u.in-addr.arpa", net_bytes[3], net_bytes[2]); - break; - case 1: - /* Class C network. */ - sprintf (qbuf, "0.%u.%u.%u.in-addr.arpa", net_bytes[3], net_bytes[2], - net_bytes[1]); - break; - case 0: - /* Class D - E network. */ - sprintf (qbuf, "%u.%u.%u.%u.in-addr.arpa", net_bytes[3], net_bytes[2], - net_bytes[1], net_bytes[0]); - break; - } - - anslen = res_query (qbuf, C_IN, T_PTR, (u_char *) &net_buffer, - sizeof (querybuf)); - if (anslen < 0) - /* Nothing found. */ - return (errno == ECONNREFUSED - || errno == EPFNOSUPPORT - || errno == EAFNOSUPPORT) - ? NSS_STATUS_UNAVAIL : NSS_STATUS_NOTFOUND; - - status = getanswer_r (&net_buffer, anslen, result, buffer, buflen, BYADDR); - if (status == NSS_STATUS_SUCCESS) - { - /* Strip trailing zeros. */ - unsigned int u_net = net; /* Maybe net should be unsigned? */ - - while ((u_net & 0xff) == 0 && u_net != 0) - u_net >>= 8; - result->n_net = u_net; - } - - return status; -} - - -#undef offsetof -#define offsetof(Type, Member) ((size_t) &((Type *) NULL)->Member) - -static enum nss_status -getanswer_r (const querybuf *answer, int anslen, struct netent *result, - char *buffer, int buflen, lookup_method net_i) -{ - /* - * Find first satisfactory answer - * - * answer --> +------------+ ( MESSAGE ) - * | Header | - * +------------+ - * | Question | the question for the name server - * +------------+ - * | Answer | RRs answering the question - * +------------+ - * | Authority | RRs pointing toward an authority - * | Additional | RRs holding additional information - * +------------+ - */ - struct net_data - { - char *aliases[MAX_NR_ALIASES]; - char linebuffer[0]; - } *net_data = (struct net_data *) buffer; - int linebuflen = buflen - offsetof (struct net_data, linebuffer); - const char *end_of_message = &answer->buf[anslen]; - const HEADER *header_pointer = &answer->hdr; - /* #/records in the answer section. */ - int answer_count = ntohs (header_pointer->ancount); - /* #/entries in the question section. */ - int question_count = ntohs (header_pointer->qdcount); - char *bp = net_data->linebuffer; - const char *cp = &answer->buf[HFIXEDSZ]; - char **alias_pointer; - int have_answer; - char *ans; - - if (question_count == 0) - /* FIXME: the Sun version uses for host name lookup an additional - parameter for pointing to h_errno. this is missing here. - OSF/1 has a per-thread h_errno variable. */ - if (header_pointer->aa != 0) - { - __set_h_errno (HOST_NOT_FOUND); - return NSS_STATUS_NOTFOUND; - } - else - { - __set_h_errno (TRY_AGAIN); - return NSS_STATUS_TRYAGAIN; - } - - /* Skip the question part. */ - while (question_count-- > 0) - cp += __dn_skipname (cp, end_of_message) + QFIXEDSZ; - - alias_pointer = result->n_aliases = &net_data->aliases[0]; - *alias_pointer = NULL; - have_answer = 0; - ans = NULL; - - while (--answer_count >= 0 && cp < end_of_message) - { - int n = dn_expand (answer->buf, end_of_message, cp, bp, linebuflen); - int type, class; - - if (n < 0 || res_dnok (bp) == 0) - break; - cp += n; - ans = strdupa (bp); - GETSHORT (type, cp); - GETSHORT (class, cp); - cp += INT32SZ; /* TTL */ - GETSHORT (n, cp); - - if (class == C_IN && type == T_PTR) - { - n = dn_expand (answer->buf, end_of_message, cp, bp, linebuflen); - if (n < 0 || !res_hnok (bp)) - { - /* XXX What does this mean? The original form from bind - returns NULL. Incrementing cp has no effect in any case. - What should I return here. ??? */ - cp += n; - return NSS_STATUS_UNAVAIL; - } - cp += n; - *alias_pointer++ = bp; - bp += strlen (bp) + 1; - result->n_addrtype = class == C_IN ? AF_INET : AF_UNSPEC; - ++have_answer; - } - } - - if (have_answer) - { - char *tmp; - int len; - char *in, *cp, *rp, *wp; - int cnt, first_flag; - - *alias_pointer = NULL; - switch (net_i) - { - case BYADDR: - result->n_name = result->n_aliases[0]; - result->n_net = 0L; - break; - case BYNAME: - len = strlen (result->n_aliases[0]); - tmp = (char *) alloca (len + 1); - tmp[len] = 0; - wp = &tmp[len - 1]; - - rp = in = result->n_aliases[0]; - result->n_name = ans; - - first_flag = 1; - for (cnt = 0; cnt < 4; ++cnt) - { - char *startp; - - startp = rp; - while (*rp != '.') - ++rp; - if (rp - startp > 1 || *startp != '0' || !first_flag) - { - first_flag = 0; - if (cnt > 0) - *wp-- = '.'; - cp = rp; - while (cp > startp) - *wp-- = *--cp; - } - in = rp + 1; - } - - result->n_net = inet_network (wp); - break; - } - - ++result->n_aliases; - return NSS_STATUS_SUCCESS; - } - - __set_h_errno (TRY_AGAIN); - return NSS_STATUS_TRYAGAIN; -} |