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_sndudata.c and t_sndvudata.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 <syslog.h> 45 #include <assert.h> 46 #include "tx.h" 47 48 int 49 _tx_sndvudata(int fd, const struct t_unitdata *unitdata, struct t_iovec *tiov, 50 unsigned int tiovcount, int api_semantics) 51 { 52 struct T_unitdata_req *udreq; 53 struct strbuf ctlbuf; 54 struct strbuf databuf; 55 int size; 56 struct _ti_user *tiptr; 57 int sv_errno; 58 int didalloc; 59 char *dataptr; 60 unsigned int nbytes; 61 62 assert(api_semantics == TX_XTI_XNS5_API); 63 if ((tiptr = _t_checkfd(fd, 0, api_semantics)) == NULL) 64 return (-1); 65 sig_mutex_lock(&tiptr->ti_lock); 66 67 if (tiptr->ti_servtype != T_CLTS) { 68 t_errno = TNOTSUPPORT; 69 sig_mutex_unlock(&tiptr->ti_lock); 70 return (-1); 71 } 72 73 if (tiovcount == 0 || tiovcount > T_IOV_MAX) { 74 t_errno = TBADDATA; 75 sig_mutex_unlock(&tiptr->ti_lock); 76 return (-1); 77 } 78 79 if (tiptr->ti_state != T_IDLE) { 80 t_errno = TOUTSTATE; 81 sig_mutex_unlock(&tiptr->ti_lock); 82 return (-1); 83 } 84 85 nbytes = _t_bytecount_upto_intmax(tiov, tiovcount); 86 87 if ((nbytes == 0) && 88 !(tiptr->ti_prov_flag & (SENDZERO|OLD_SENDZERO))) { 89 t_errno = TBADDATA; 90 sig_mutex_unlock(&tiptr->ti_lock); 91 return (-1); 92 } 93 94 if ((tiptr->ti_maxpsz > 0) && (nbytes > (uint32_t)tiptr->ti_maxpsz)) { 95 t_errno = TBADDATA; 96 sv_errno = errno; 97 sig_mutex_unlock(&tiptr->ti_lock); 98 errno = sv_errno; 99 return (-1); 100 } 101 102 /* 103 * Acquire ctlbuf for use in sending/receiving control part 104 * of the message. 105 */ 106 if (_t_acquire_ctlbuf(tiptr, &ctlbuf, &didalloc) < 0) { 107 sv_errno = errno; 108 sig_mutex_unlock(&tiptr->ti_lock); 109 errno = sv_errno; 110 return (-1); 111 } 112 113 /* LINTED pointer cast */ 114 udreq = (struct T_unitdata_req *)ctlbuf.buf; 115 116 udreq->PRIM_type = T_UNITDATA_REQ; 117 udreq->DEST_length = unitdata->addr.len; 118 udreq->DEST_offset = 0; 119 udreq->OPT_length = unitdata->opt.len; 120 udreq->OPT_offset = 0; 121 size = (int)sizeof (struct T_unitdata_req); 122 123 if (unitdata->addr.len) { 124 if (_t_aligned_copy(&ctlbuf, unitdata->addr.len, size, 125 unitdata->addr.buf, &udreq->DEST_offset) < 0) { 126 /* 127 * Aligned copy based will overflow buffer 128 * allocated based on maximum transport address 129 * size information 130 */ 131 t_errno = TSYSERR; 132 errno = EPROTO; 133 goto err_out; 134 } 135 size = udreq->DEST_offset + udreq->DEST_length; 136 } 137 if (unitdata->opt.len) { 138 if (_t_aligned_copy(&ctlbuf, unitdata->opt.len, size, 139 unitdata->opt.buf, &udreq->OPT_offset) < 0) { 140 /* 141 * Aligned copy based will overflow buffer 142 * allocated based on maximum transport option 143 * size information 144 */ 145 t_errno = TSYSERR; 146 errno = EPROTO; 147 goto err_out; 148 } 149 size = udreq->OPT_offset + udreq->OPT_length; 150 } 151 152 if (size > (int)ctlbuf.maxlen) { 153 t_errno = TSYSERR; 154 errno = EIO; 155 goto err_out; 156 } 157 158 ctlbuf.len = size; 159 160 dataptr = NULL; 161 if (nbytes != 0) { 162 if ((dataptr = malloc((size_t)nbytes)) == NULL) { 163 t_errno = TSYSERR; 164 goto err_out; 165 } 166 _t_gather(dataptr, tiov, tiovcount); 167 } 168 databuf.buf = dataptr; 169 databuf.len = nbytes; 170 databuf.maxlen = nbytes; 171 /* 172 * Calls to send data (write or putmsg) can potentially 173 * block, for MT case, we drop the lock and enable signals here 174 * and acquire it back 175 */ 176 sig_mutex_unlock(&tiptr->ti_lock); 177 if (putmsg(fd, &ctlbuf, &databuf, 0) < 0) { 178 if (errno == EAGAIN) 179 t_errno = TFLOW; 180 else 181 t_errno = TSYSERR; 182 sv_errno = errno; 183 sig_mutex_lock(&tiptr->ti_lock); 184 errno = sv_errno; 185 goto err_out; 186 } 187 sig_mutex_lock(&tiptr->ti_lock); 188 189 _T_TX_NEXTSTATE(T_SNDUDATA, tiptr, 190 "t_sndvudata: invalid state event T_SNDUDATA"); 191 if (didalloc) 192 free(ctlbuf.buf); 193 else 194 tiptr->ti_ctlbuf = ctlbuf.buf; 195 if (dataptr != NULL) 196 free(dataptr); 197 sig_mutex_unlock(&tiptr->ti_lock); 198 return (0); 199 err_out: 200 sv_errno = errno; 201 if (didalloc) 202 free(ctlbuf.buf); 203 else 204 tiptr->ti_ctlbuf = ctlbuf.buf; 205 if (dataptr != NULL) 206 free(dataptr); 207 sig_mutex_unlock(&tiptr->ti_lock); 208 errno = sv_errno; 209 return (-1); 210 } 211