1 /* $NetBSD: misc_rpc.c,v 1.1.1.3 2015/01/17 16:34:18 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1997-2014 Erez Zadok 5 * Copyright (c) 1990 Jan-Simon Pendry 6 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine 7 * Copyright (c) 1990 The Regents of the University of California. 8 * All rights reserved. 9 * 10 * This code is derived from software contributed to Berkeley by 11 * Jan-Simon Pendry at Imperial College, London. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * 38 * File: am-utils/libamu/misc_rpc.c 39 * 40 */ 41 42 /* 43 * Additions to Sun RPC. 44 */ 45 46 #ifdef HAVE_CONFIG_H 47 # include <config.h> 48 #endif /* HAVE_CONFIG_H */ 49 #include <am_defs.h> 50 #include <amu.h> 51 52 /* 53 * Some systems renamed _seterr_reply to __seterr_reply (with two 54 * leading underscores) 55 */ 56 #if !defined(HAVE__SETERR_REPLY) && defined(HAVE___SETERR_REPLY) 57 # define _seterr_reply __seterr_reply 58 #endif /* !defined(HAVE__SETERR_REPLY) && defined(HAVE___SETERR_REPLY) */ 59 60 61 void 62 rpc_msg_init(struct rpc_msg *mp, u_long prog, u_long vers, u_long proc) 63 { 64 /* 65 * Initialize the message 66 */ 67 memset((voidp) mp, 0, sizeof(*mp)); 68 mp->rm_xid = 0; 69 mp->rm_direction = CALL; 70 mp->rm_call.cb_rpcvers = RPC_MSG_VERSION; 71 mp->rm_call.cb_prog = prog; 72 mp->rm_call.cb_vers = vers; 73 mp->rm_call.cb_proc = proc; 74 } 75 76 77 /* 78 * Field reply to call to mountd 79 */ 80 int 81 pickup_rpc_reply(voidp pkt, int len, voidp where, XDRPROC_T_TYPE where_xdr) 82 { 83 XDR reply_xdr; 84 int ok; 85 struct rpc_err err; 86 struct rpc_msg reply_msg; 87 int error = 0; 88 89 /* memset((voidp) &err, 0, sizeof(err)); */ 90 memset((voidp) &reply_msg, 0, sizeof(reply_msg)); 91 memset((voidp) &reply_xdr, 0, sizeof(reply_xdr)); 92 93 reply_msg.acpted_rply.ar_results.where = where; 94 reply_msg.acpted_rply.ar_results.proc = where_xdr; 95 96 xdrmem_create(&reply_xdr, pkt, len, XDR_DECODE); 97 98 ok = xdr_replymsg(&reply_xdr, &reply_msg); 99 if (!ok) { 100 error = EIO; 101 goto drop; 102 } 103 _seterr_reply(&reply_msg, &err); 104 if (err.re_status != RPC_SUCCESS) { 105 error = EIO; 106 goto drop; 107 } 108 109 drop: 110 if (reply_msg.rm_reply.rp_stat == MSG_ACCEPTED && 111 reply_msg.acpted_rply.ar_verf.oa_base) { 112 reply_xdr.x_op = XDR_FREE; 113 (void) xdr_opaque_auth(&reply_xdr, 114 &reply_msg.acpted_rply.ar_verf); 115 } 116 xdr_destroy(&reply_xdr); 117 118 return error; 119 } 120 121 122 int 123 make_rpc_packet(char *buf, int buflen, u_long proc, struct rpc_msg *mp, voidp arg, XDRPROC_T_TYPE arg_xdr, AUTH *auth) 124 { 125 XDR msg_xdr; 126 int len; 127 /* 128 * Never cast pointers between different integer types, it breaks badly 129 * on big-endian platforms if those types have different sizes. 130 * 131 * Cast to a local variable instead, and use that variable's address. 132 */ 133 enum_t local_proc = (enum_t) proc; 134 135 xdrmem_create(&msg_xdr, buf, buflen, XDR_ENCODE); 136 137 /* 138 * Basic protocol header 139 */ 140 if (!xdr_callhdr(&msg_xdr, mp)) 141 return -EIO; 142 143 /* 144 * Called procedure number 145 */ 146 if (!xdr_enum(&msg_xdr, &local_proc)) 147 return -EIO; 148 149 /* 150 * Authorization 151 */ 152 if (!AUTH_MARSHALL(auth, &msg_xdr)) 153 return -EIO; 154 155 /* 156 * Arguments 157 */ 158 if (!(*arg_xdr) (&msg_xdr, arg)) 159 return -EIO; 160 161 /* 162 * Determine length 163 */ 164 len = xdr_getpos(&msg_xdr); 165 166 /* 167 * Throw away xdr 168 */ 169 xdr_destroy(&msg_xdr); 170 171 return len; 172 } 173 174 175 /* get uid/gid from RPC credentials */ 176 int 177 getcreds(struct svc_req *rp, uid_t *u, gid_t *g, SVCXPRT *nfsxprt) 178 { 179 struct authunix_parms *aup = (struct authunix_parms *) NULL; 180 #ifdef HAVE_RPC_AUTH_DES_H 181 struct authdes_cred *adp; 182 #endif /* HAVE_RPC_AUTH_DES_H */ 183 184 switch (rp->rq_cred.oa_flavor) { 185 186 case AUTH_UNIX: 187 aup = (struct authunix_parms *) rp->rq_clntcred; 188 *u = aup->aup_uid; 189 *g = aup->aup_gid; 190 break; 191 192 #ifdef HAVE_RPC_AUTH_DES_H 193 case AUTH_DES: 194 adp = (struct authdes_cred *) rp->rq_clntcred; 195 *g = INVALIDID; /* some unknown group id */ 196 if (sscanf(adp->adc_fullname.name, "unix.%lu@", (u_long *) u) == 1) 197 break; 198 /* fall through */ 199 #endif /* HAVE_RPC_AUTH_DES_H */ 200 201 default: 202 *u = *g = INVALIDID; /* just in case */ 203 svcerr_weakauth(nfsxprt); 204 return -1; 205 } 206 207 return 0; /* everything is ok */ 208 } 209
Indexes created Thu Aug 13 00:25:44 UTC 2026