ypxfrd.x revision 16119
1/* 2 * Copyright (c) 1995, 1996 3 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Bill Paul. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * $Id: ypxfrd.x,v 1.8 1996/06/03 20:17:04 wpaul Exp $ 33 */ 34 35/* 36 * This protocol definition file describes a file transfer 37 * system used to very quickly move NIS maps from one host to 38 * another. This is similar to what Sun does with their ypxfrd 39 * protocol, but it must be stressed that this protocol is _NOT_ 40 * compatible with Sun's. There are a couple of reasons for this: 41 * 42 * 1) Sun's protocol is proprietary. The protocol definition is 43 * not freely available in any of the SunRPC source distributions, 44 * even though the NIS v2 protocol is. 45 * 46 * 2) The idea here is to transfer entire raw files rather than 47 * sending just the records. Sun uses ndbm for its NIS map files, 48 * while FreeBSD uses Berkeley DB. Both are hash databases, but the 49 * formats are incompatible, making it impossible for them to 50 * use each others' files. Even if FreeBSD adopted ndbm for its 51 * database format, FreeBSD/i386 is a little-endian OS and 52 * SunOS/SPARC is big-endian; ndbm is byte-order sensitive and 53 * not very smart about it, which means an attempt to read a 54 * database on a little-endian box that was created on a big-endian 55 * box (or vice-versa) can cause the ndbm code to eat itself. 56 * Luckily, Berkeley DB is able to deal with this situation in 57 * a more graceful manner. 58 * 59 * While the protocol is incompatible, the idea is the same: we just open 60 * up a TCP pipe to the client and transfer the raw map database 61 * from the master server to the slave. This is many times faster than 62 * the standard yppush/ypxfr transfer method since it saves us from 63 * having to recreate the map databases via the DB library each time. 64 * For example: creating a passwd database with 30,000 entries with yp_mkdb 65 * can take a couple of minutes, but to just copy the file takes only a few 66 * seconds. 67 */ 68 69#ifndef RPC_HDR 70%#ifndef lint 71%static const char rcsid[] = "$Id: ypxfrd.x,v 1.8 1996/06/03 20:17:04 wpaul Exp $"; 72%#endif /* not lint */ 73#endif 74 75/* XXX cribbed from yp.x */ 76const _YPMAXRECORD = 1024; 77const _YPMAXDOMAIN = 64; 78const _YPMAXMAP = 64; 79const _YPMAXPEER = 64; 80 81/* Suggested default -- not necesarrily the one used. */ 82const YPXFRBLOCK = 32767; 83 84enum xfrstat { 85 XFR_REQUEST_OK = 1, /* Transfer request granted */ 86 XFR_DENIED = 2, /* Transfer request denied */ 87 XFR_NOFILE = 3, /* Requested map file doesn't exist */ 88 XFR_ACCESS = 4, /* File exists, but I couldn't access it */ 89 XFR_BADDB = 5, /* File is not a hash database */ 90 XFR_READ_OK = 6, /* Block read successfully */ 91 XFR_READ_ERR = 7, /* Read error during transfer */ 92 XFR_DONE = 8 /* Transfer completed */ 93}; 94 95typedef string xfrdomain<_YPMAXDOMAIN>; 96typedef string xfrmap<_YPMAXMAP>; 97 98/* Ask the remote ypxfrd for a map using this structure */ 99struct ypxfr_mapname { 100 xfrmap xfrmap; 101 xfrdomain xfrdomain; 102}; 103 104/* Read response using this structure. */ 105union xfr switch (bool ok) { 106case TRUE: 107 opaque xfrblock_buf<>; 108case FALSE: 109 enum xfrstat xfrstat; 110}; 111 112program YPXFRD_FREEBSD_PROG { 113 version YPXFRD_FREEBSD_VERS { 114 union xfr 115 YPXFRD_GETMAP(ypxfr_mapname) = 1; 116 } = 1; 117} = 600100069; /* 100069 + 60000000 -- 100069 is the Sun ypxfrd prog number */ 118