1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 23/* 24 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28#pragma ident "%Z%%M% %I% %E% SMI" 29 30/* 31 * t_rcvrel.c and t_rcvreldata.c are very similar and contain common code. 32 * Any changes to either of them should be reviewed to see whether they 33 * are applicable to the other file. 34 */ 35#include "mt.h" 36#include <stdlib.h> 37#include <errno.h> 38#include <stropts.h> 39#include <sys/stream.h> 40#define _SUN_TPI_VERSION 2 41#include <sys/tihdr.h> 42#include <sys/timod.h> 43#include <xti.h> 44#include <signal.h> 45#include <syslog.h> 46#include <assert.h> 47#include "tx.h" 48 49/* ARGSUSED */ 50int 51_tx_rcvreldata(int fd, struct t_discon *discon, int api_semantics) 52{ 53 struct strbuf ctlbuf; 54 struct strbuf databuf; 55 int retval; 56 union T_primitives *pptr; 57 struct _ti_user *tiptr; 58 int sv_errno; 59 int didalloc, didralloc; 60 61 int flg = 0; 62 63 64 assert(api_semantics == TX_XTI_XNS5_API); 65 if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == 0) 66 return (-1); 67 sig_mutex_lock(&tiptr->ti_lock); 68 69 if (tiptr->ti_servtype != T_COTS_ORD) { 70 t_errno = TNOTSUPPORT; 71 sig_mutex_unlock(&tiptr->ti_lock); 72 return (-1); 73 } 74 75 if (!(tiptr->ti_state == T_DATAXFER || 76 tiptr->ti_state == T_OUTREL)) { 77 t_errno = TOUTSTATE; 78 sig_mutex_unlock(&tiptr->ti_lock); 79 return (-1); 80 } 81 82 if ((retval = _t_look_locked(fd, tiptr, 0, api_semantics)) < 0) { 83 sv_errno = errno; 84 sig_mutex_unlock(&tiptr->ti_lock); 85 errno = sv_errno; 86 return (-1); 87 } 88 89 if (retval == T_DISCONNECT) { 90 /* 91 * This ensures preference to T_DISCON_IND which is 92 * the design model for TPI 93 */ 94 t_errno = TLOOK; 95 sig_mutex_unlock(&tiptr->ti_lock); 96 return (-1); 97 } 98 99 /* 100 * Someday there could be transport providers that support T_ORDRELDATA 101 * Until then this function behaves the same as t_rcvrel() 102 * Note: Currently only mOSI ("minimal OSI") provider is specified 103 * to use T_ORDRELDATA so probability of needing it is minimal. 104 */ 105 106 if ((tiptr->ti_lookcnt > 0) && 107 /* LINTED pointer cast */ 108 (*((t_scalar_t *)tiptr->ti_lookbufs.tl_lookcbuf) == T_ORDREL_IND)) { 109 /* 110 * Current look buffer event is T_ORDREL_IND. 111 * Remove it from look buffer event list. 112 */ 113 _t_free_looklist_head(tiptr); 114 _T_TX_NEXTSTATE(T_RCVREL, tiptr, 115 "t_rcvreldata: invalid state event T_RCVREL"); 116 sig_mutex_unlock(&tiptr->ti_lock); 117 return (0); 118 } else { 119 if (retval != T_ORDREL) { 120 t_errno = TNOREL; 121 sig_mutex_unlock(&tiptr->ti_lock); 122 return (-1); 123 } 124 } 125 126 /* 127 * get ordrel off read queue. 128 * use ctl and rcv buffers 129 * 130 * Acquire ctlbuf for use in sending/receiving control part 131 * of the message. 132 */ 133 if (_t_acquire_ctlbuf(tiptr, &ctlbuf, &didalloc) < 0) { 134 sv_errno = errno; 135 sig_mutex_unlock(&tiptr->ti_lock); 136 errno = sv_errno; 137 return (-1); 138 } 139 140 /* 141 * Acquire databuf for use in sending/receiving data part 142 */ 143 if (_t_acquire_databuf(tiptr, &databuf, &didralloc) < 0) { 144 sv_errno = errno; 145 if (didalloc) 146 free(ctlbuf.buf); 147 else 148 tiptr->ti_ctlbuf = ctlbuf.buf; 149 sig_mutex_unlock(&tiptr->ti_lock); 150 errno = sv_errno; 151 return (-1); 152 } 153 154 /* 155 * Since we have verified above that an orderly release event 156 * is pending on this endpoint, we assume that this getmsg() 157 * cannot block forever. 158 */ 159 do { 160 retval = getmsg(fd, &ctlbuf, &databuf, &flg); 161 } while (retval < 0 && errno == EINTR); 162 163 if (retval < 0) { 164 t_errno = TSYSERR; 165 goto err_out; 166 } 167 168 /* 169 * did I get entire message? 170 */ 171 if (retval > 0) { 172 t_errno = TSYSERR; 173 errno = EIO; 174 goto err_out; 175 } 176 /* LINTED pointer cast */ 177 pptr = (union T_primitives *)ctlbuf.buf; 178 179 if (ctlbuf.len < (int)sizeof (struct T_ordrel_ind)) { 180 t_errno = TSYSERR; 181 errno = EPROTO; 182 goto err_out; 183 } 184 if (pptr->type != T_ORDREL_IND) { 185 if (pptr->type == T_DISCON_IND) { 186 /* 187 * T_DISCON_IND gets priority following 188 * TPI design philosphy. 189 * 190 * Add it to the events in the "look buffer" 191 * list of events. This routine may defer signals. 192 */ 193 if (_t_register_lookevent(tiptr, databuf.buf, 194 databuf.len, ctlbuf.buf, 195 ctlbuf.len) < 0) { 196 t_errno = TSYSERR; 197 errno = ENOMEM; 198 goto err_out; 199 } 200 t_errno = TLOOK; 201 goto err_out; 202 } else { 203 t_errno = TSYSERR; 204 errno = EPROTO; 205 goto err_out; 206 } 207 } 208 209 _T_TX_NEXTSTATE(T_RCVREL, tiptr, 210 "t_rcvreldata: invalid state event T_RCVREL"); 211 212 if (didalloc) 213 free(ctlbuf.buf); 214 else 215 tiptr->ti_ctlbuf = ctlbuf.buf; 216 if (didralloc) 217 free(databuf.buf); 218 else 219 tiptr->ti_rcvbuf = databuf.buf; 220 sig_mutex_unlock(&tiptr->ti_lock); 221 return (0); 222 223err_out: 224 sv_errno = errno; 225 226 if (didalloc) 227 free(ctlbuf.buf); 228 else 229 tiptr->ti_ctlbuf = ctlbuf.buf; 230 if (didralloc) 231 free(databuf.buf); 232 else 233 tiptr->ti_rcvbuf = databuf.buf; 234 sig_mutex_unlock(&tiptr->ti_lock); 235 errno = sv_errno; 236 return (-1); 237} 238