2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
322 lines
9.2 KiB
C
322 lines
9.2 KiB
C
/* $NetBSD: res_mkquery.c,v 1.12 2009/04/12 19:43:37 christos Exp $ */
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/*
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* Portions Copyright (C) 2004, 2005, 2008 Internet Systems Consortium, Inc. ("ISC")
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* Portions Copyright (C) 1996, 1997, 1988, 1999, 2001, 2003 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* Copyright (c) 1985, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Portions Copyright (c) 1993 by Digital Equipment Corporation.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies, and that
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* the name of Digital Equipment Corporation not be used in advertising or
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* publicity pertaining to distribution of the document or software without
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* specific, written prior permission.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
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* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
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* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#ifdef notdef
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static const char sccsid[] = "@(#)res_mkquery.c 8.1 (Berkeley) 6/4/93";
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static const char rcsid[] = "Id: res_mkquery.c,v 1.10 2008/12/11 09:59:00 marka Exp";
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#else
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__RCSID("$NetBSD: res_mkquery.c,v 1.12 2009/04/12 19:43:37 christos Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include "port_before.h"
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#include "namespace.h"
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#include <sys/types.h>
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#include <sys/param.h>
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#include <netinet/in.h>
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#include <arpa/nameser.h>
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#include <netdb.h>
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#include <resolv.h>
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#include <stdio.h>
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#include <string.h>
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#include "port_after.h"
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#if 0
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#ifdef __weak_alias
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__weak_alias(res_nmkquery,_res_nmkquery)
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__weak_alias(res_nopt,_res_nopt)
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#endif
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#endif
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/* Options. Leave them on. */
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#ifndef DEBUG
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#define DEBUG
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#endif
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extern const char *_res_opcodes[];
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/*%
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* Form all types of queries.
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* Returns the size of the result or -1.
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*/
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int
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res_nmkquery(res_state statp,
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int op, /*!< opcode of query */
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const char *dname, /*!< domain name */
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int class, int type, /*!< class and type of query */
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const u_char *data, /*!< resource record data */
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int datalen, /*!< length of data */
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const u_char *newrr_in, /*!< new rr for modify or append */
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u_char *buf, /*!< buffer to put query */
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int buflen) /*!< size of buffer */
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{
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register HEADER *hp;
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register u_char *cp, *ep;
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register int n;
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u_char *dnptrs[20], **dpp, **lastdnptr;
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UNUSED(newrr_in);
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#ifdef DEBUG
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if (statp->options & RES_DEBUG)
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printf(";; res_nmkquery(%s, %s, %s, %s)\n",
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_res_opcodes[op], dname, p_class(class), p_type(type));
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#endif
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/*
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* Initialize header fields.
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*/
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if ((buf == NULL) || (buflen < HFIXEDSZ))
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return (-1);
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memset(buf, 0, HFIXEDSZ);
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hp = (HEADER *)(void *)buf;
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statp->id = res_nrandomid(statp);
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hp->id = htons(statp->id);
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hp->opcode = op;
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hp->rd = (statp->options & RES_RECURSE) != 0U;
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hp->rcode = NOERROR;
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cp = buf + HFIXEDSZ;
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ep = buf + buflen;
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dpp = dnptrs;
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*dpp++ = buf;
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*dpp++ = NULL;
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lastdnptr = dnptrs + sizeof dnptrs / sizeof dnptrs[0];
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/*
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* perform opcode specific processing
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*/
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switch (op) {
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case QUERY: /*FALLTHROUGH*/
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case NS_NOTIFY_OP:
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if (ep - cp < QFIXEDSZ)
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return (-1);
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if ((n = dn_comp(dname, cp, ep - cp - QFIXEDSZ, dnptrs,
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lastdnptr)) < 0)
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return (-1);
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cp += n;
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ns_put16(type, cp);
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cp += INT16SZ;
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ns_put16(class, cp);
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cp += INT16SZ;
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hp->qdcount = htons(1);
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if (op == QUERY || data == NULL)
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break;
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/*
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* Make an additional record for completion domain.
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*/
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if ((ep - cp) < RRFIXEDSZ)
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return (-1);
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n = dn_comp((const char *)data, cp, ep - cp - RRFIXEDSZ,
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dnptrs, lastdnptr);
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if (n < 0)
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return (-1);
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cp += n;
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ns_put16(T_NULL, cp);
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cp += INT16SZ;
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ns_put16(class, cp);
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cp += INT16SZ;
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ns_put32(0, cp);
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cp += INT32SZ;
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ns_put16(0, cp);
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cp += INT16SZ;
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hp->arcount = htons(1);
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break;
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case IQUERY:
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/*
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* Initialize answer section
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*/
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if (ep - cp < 1 + RRFIXEDSZ + datalen)
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return (-1);
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*cp++ = '\0'; /*%< no domain name */
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ns_put16(type, cp);
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cp += INT16SZ;
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ns_put16(class, cp);
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cp += INT16SZ;
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ns_put32(0, cp);
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cp += INT32SZ;
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ns_put16(datalen, cp);
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cp += INT16SZ;
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if (datalen) {
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memcpy(cp, data, (size_t)datalen);
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cp += datalen;
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}
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hp->ancount = htons(1);
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break;
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default:
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return (-1);
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}
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return (cp - buf);
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}
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#ifdef RES_USE_EDNS0
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/* attach OPT pseudo-RR, as documented in RFC2671 (EDNS0). */
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int
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res_nopt(res_state statp,
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int n0, /*%< current offset in buffer */
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u_char *buf, /*%< buffer to put query */
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int buflen, /*%< size of buffer */
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int anslen) /*%< UDP answer buffer size */
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{
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register HEADER *hp;
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register u_char *cp, *ep;
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u_int16_t flags = 0;
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#ifdef DEBUG
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if ((statp->options & RES_DEBUG) != 0U)
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printf(";; res_nopt()\n");
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#endif
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hp = (HEADER *)(void *)buf;
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cp = buf + n0;
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ep = buf + buflen;
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if ((ep - cp) < 1 + RRFIXEDSZ)
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return (-1);
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*cp++ = 0; /*%< "." */
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ns_put16(ns_t_opt, cp); /*%< TYPE */
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cp += INT16SZ;
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ns_put16(anslen & 0xffff, cp); /*%< CLASS = UDP payload size */
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cp += INT16SZ;
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*cp++ = NOERROR; /*%< extended RCODE */
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*cp++ = 0; /*%< EDNS version */
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if (statp->options & RES_USE_DNSSEC) {
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#ifdef DEBUG
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if (statp->options & RES_DEBUG)
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printf(";; res_opt()... ENDS0 DNSSEC\n");
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#endif
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flags |= NS_OPT_DNSSEC_OK;
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}
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ns_put16(flags, cp);
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cp += INT16SZ;
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ns_put16(0U, cp); /*%< RDLEN */
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cp += INT16SZ;
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hp->arcount = htons(ntohs(hp->arcount) + 1);
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return (cp - buf);
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}
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/*
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* Construct variable data (RDATA) block for OPT psuedo-RR, append it
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* to the buffer, then update the RDLEN field (previously set to zero by
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* res_nopt()) with the new RDATA length.
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*/
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int
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res_nopt_rdata(res_state statp,
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int n0, /*%< current offset in buffer */
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u_char *buf, /*%< buffer to put query */
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int buflen, /*%< size of buffer */
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u_char *rdata, /*%< ptr to start of opt rdata */
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u_short code, /*%< OPTION-CODE */
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u_short len, /*%< OPTION-LENGTH */
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u_char *data) /*%< OPTION_DATA */
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{
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register u_char *cp, *ep;
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#ifdef DEBUG
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if ((statp->options & RES_DEBUG) != 0U)
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printf(";; res_nopt_rdata()\n");
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#endif
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cp = buf + n0;
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ep = buf + buflen;
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if ((ep - cp) < (4 + len))
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return (-1);
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if (rdata < (buf + 2) || rdata >= ep)
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return (-1);
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ns_put16(code, cp);
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cp += INT16SZ;
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ns_put16(len, cp);
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cp += INT16SZ;
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memcpy(cp, data, (size_t)len);
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cp += len;
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len = cp - rdata;
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ns_put16(len, rdata - 2); /* Update RDLEN field */
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return (cp - buf);
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}
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#endif
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/*! \file */
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