1 /* $OpenBSD: rpc_callmsg.c,v 1.10 2010/09/01 14:43:34 millert Exp $ */ 2 3 /* 4 * Copyright (c) 2010, Oracle America, Inc. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are 8 * met: 9 * 10 * * Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * * Redistributions in binary form must reproduce the above 13 * copyright notice, this list of conditions and the following 14 * disclaimer in the documentation and/or other materials 15 * provided with the distribution. 16 * * Neither the name of the "Oracle America, Inc." nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <stdlib.h> 35 #include <string.h> 36 #include <sys/param.h> 37 38 #include <rpc/rpc.h> 39 40 /* 41 * XDR a call message 42 */ 43 bool_t 44 xdr_callmsg(XDR *xdrs, struct rpc_msg *cmsg) 45 { 46 int32_t *buf; 47 struct opaque_auth *oa; 48 49 if (xdrs->x_op == XDR_ENCODE) { 50 if (cmsg->rm_call.cb_cred.oa_length > MAX_AUTH_BYTES) { 51 return (FALSE); 52 } 53 if (cmsg->rm_call.cb_verf.oa_length > MAX_AUTH_BYTES) { 54 return (FALSE); 55 } 56 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT 57 + RNDUP(cmsg->rm_call.cb_cred.oa_length) 58 + 2 * BYTES_PER_XDR_UNIT 59 + RNDUP(cmsg->rm_call.cb_verf.oa_length)); 60 if (buf != NULL) { 61 IXDR_PUT_LONG(buf, cmsg->rm_xid); 62 IXDR_PUT_ENUM(buf, cmsg->rm_direction); 63 if (cmsg->rm_direction != CALL) { 64 return (FALSE); 65 } 66 IXDR_PUT_LONG(buf, cmsg->rm_call.cb_rpcvers); 67 if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION) { 68 return (FALSE); 69 } 70 IXDR_PUT_LONG(buf, cmsg->rm_call.cb_prog); 71 IXDR_PUT_LONG(buf, cmsg->rm_call.cb_vers); 72 IXDR_PUT_LONG(buf, cmsg->rm_call.cb_proc); 73 oa = &cmsg->rm_call.cb_cred; 74 IXDR_PUT_ENUM(buf, oa->oa_flavor); 75 IXDR_PUT_LONG(buf, oa->oa_length); 76 if (oa->oa_length) { 77 memcpy((caddr_t)buf, oa->oa_base, oa->oa_length); 78 buf += RNDUP(oa->oa_length) / sizeof (int32_t); 79 } 80 oa = &cmsg->rm_call.cb_verf; 81 IXDR_PUT_ENUM(buf, oa->oa_flavor); 82 IXDR_PUT_LONG(buf, oa->oa_length); 83 if (oa->oa_length) { 84 memcpy((caddr_t)buf, oa->oa_base, oa->oa_length); 85 /* no real need.... 86 buf += RNDUP(oa->oa_length) / sizeof (int32_t); 87 */ 88 } 89 return (TRUE); 90 } 91 } 92 if (xdrs->x_op == XDR_DECODE) { 93 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT); 94 if (buf != NULL) { 95 cmsg->rm_xid = IXDR_GET_LONG(buf); 96 cmsg->rm_direction = IXDR_GET_ENUM(buf, enum msg_type); 97 if (cmsg->rm_direction != CALL) { 98 return (FALSE); 99 } 100 cmsg->rm_call.cb_rpcvers = IXDR_GET_LONG(buf); 101 if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION) { 102 return (FALSE); 103 } 104 cmsg->rm_call.cb_prog = IXDR_GET_LONG(buf); 105 cmsg->rm_call.cb_vers = IXDR_GET_LONG(buf); 106 cmsg->rm_call.cb_proc = IXDR_GET_LONG(buf); 107 oa = &cmsg->rm_call.cb_cred; 108 oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t); 109 oa->oa_length = IXDR_GET_LONG(buf); 110 if (oa->oa_length) { 111 if (oa->oa_length > MAX_AUTH_BYTES) { 112 return (FALSE); 113 } 114 if (oa->oa_base == NULL) { 115 oa->oa_base = (caddr_t) 116 mem_alloc(oa->oa_length); 117 if (oa->oa_base == NULL) 118 return (FALSE); 119 } 120 buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length)); 121 if (buf == NULL) { 122 if (xdr_opaque(xdrs, oa->oa_base, 123 oa->oa_length) == FALSE) { 124 return (FALSE); 125 } 126 } else { 127 memcpy(oa->oa_base, (caddr_t)buf, 128 oa->oa_length); 129 /* no real need.... 130 buf += RNDUP(oa->oa_length) / 131 sizeof (int32_t); 132 */ 133 } 134 } 135 oa = &cmsg->rm_call.cb_verf; 136 buf = XDR_INLINE(xdrs, 2 * BYTES_PER_XDR_UNIT); 137 if (buf == NULL) { 138 if (xdr_enum(xdrs, &oa->oa_flavor) == FALSE || 139 xdr_u_int(xdrs, &oa->oa_length) == FALSE) { 140 return (FALSE); 141 } 142 } else { 143 oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t); 144 oa->oa_length = IXDR_GET_LONG(buf); 145 } 146 if (oa->oa_length) { 147 if (oa->oa_length > MAX_AUTH_BYTES) { 148 return (FALSE); 149 } 150 if (oa->oa_base == NULL) { 151 oa->oa_base = (caddr_t) 152 mem_alloc(oa->oa_length); 153 if (oa->oa_base == NULL) 154 return (FALSE); 155 } 156 buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length)); 157 if (buf == NULL) { 158 if (xdr_opaque(xdrs, oa->oa_base, 159 oa->oa_length) == FALSE) { 160 return (FALSE); 161 } 162 } else { 163 memcpy(oa->oa_base, (caddr_t)buf, 164 oa->oa_length); 165 /* no real need... 166 buf += RNDUP(oa->oa_length) / 167 sizeof (int32_t); 168 */ 169 } 170 } 171 return (TRUE); 172 } 173 } 174 if ( 175 xdr_u_int32_t(xdrs, &(cmsg->rm_xid)) && 176 xdr_enum(xdrs, (enum_t *)&(cmsg->rm_direction)) && 177 (cmsg->rm_direction == CALL) && 178 xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_rpcvers)) && 179 (cmsg->rm_call.cb_rpcvers == RPC_MSG_VERSION) && 180 xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_prog)) && 181 xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_vers)) && 182 xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_proc)) && 183 xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_cred)) ) 184 return (xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_verf))); 185 return (FALSE); 186 } 187 188