1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START 3*7c478bd9Sstevel@tonic-gate * 4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*7c478bd9Sstevel@tonic-gate * with the License. 8*7c478bd9Sstevel@tonic-gate * 9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 12*7c478bd9Sstevel@tonic-gate * and limitations under the License. 13*7c478bd9Sstevel@tonic-gate * 14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*7c478bd9Sstevel@tonic-gate * 20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END 21*7c478bd9Sstevel@tonic-gate */ 22*7c478bd9Sstevel@tonic-gate /* 23*7c478bd9Sstevel@tonic-gate * Copyright 2001 Sun Microsystems, Inc. All rights reserved. 24*7c478bd9Sstevel@tonic-gate * Use is subject to license terms. 25*7c478bd9Sstevel@tonic-gate */ 26*7c478bd9Sstevel@tonic-gate 27*7c478bd9Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28*7c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 29*7c478bd9Sstevel@tonic-gate 30*7c478bd9Sstevel@tonic-gate /* 31*7c478bd9Sstevel@tonic-gate * University Copyright- Copyright (c) 1982, 1986, 1988 32*7c478bd9Sstevel@tonic-gate * The Regents of the University of California 33*7c478bd9Sstevel@tonic-gate * All Rights Reserved 34*7c478bd9Sstevel@tonic-gate * 35*7c478bd9Sstevel@tonic-gate * University Acknowledgment- Portions of this document are derived from 36*7c478bd9Sstevel@tonic-gate * software developed by the University of California, Berkeley, and its 37*7c478bd9Sstevel@tonic-gate * contributors. 38*7c478bd9Sstevel@tonic-gate */ 39*7c478bd9Sstevel@tonic-gate 40*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 41*7c478bd9Sstevel@tonic-gate 42*7c478bd9Sstevel@tonic-gate /* 43*7c478bd9Sstevel@tonic-gate * Kernel TLI-like function to read a datagram off of a 44*7c478bd9Sstevel@tonic-gate * transport endpoints stream head. 45*7c478bd9Sstevel@tonic-gate * 46*7c478bd9Sstevel@tonic-gate * Returns: 47*7c478bd9Sstevel@tonic-gate * 0 On success or positive error code. 48*7c478bd9Sstevel@tonic-gate * On sucess, type is set to: 49*7c478bd9Sstevel@tonic-gate * T_DATA If normal data has been received 50*7c478bd9Sstevel@tonic-gate * T_UDERR If an error indication has been received, 51*7c478bd9Sstevel@tonic-gate * in which case uderr contains the unitdata 52*7c478bd9Sstevel@tonic-gate * error number. 53*7c478bd9Sstevel@tonic-gate * T_ERROR 54*7c478bd9Sstevel@tonic-gate */ 55*7c478bd9Sstevel@tonic-gate 56*7c478bd9Sstevel@tonic-gate #include <sys/param.h> 57*7c478bd9Sstevel@tonic-gate #include <sys/types.h> 58*7c478bd9Sstevel@tonic-gate #include <sys/user.h> 59*7c478bd9Sstevel@tonic-gate #include <sys/file.h> 60*7c478bd9Sstevel@tonic-gate #include <sys/errno.h> 61*7c478bd9Sstevel@tonic-gate #include <sys/stream.h> 62*7c478bd9Sstevel@tonic-gate #include <sys/strsubr.h> 63*7c478bd9Sstevel@tonic-gate #include <sys/vnode.h> 64*7c478bd9Sstevel@tonic-gate #include <sys/ioctl.h> 65*7c478bd9Sstevel@tonic-gate #include <sys/stropts.h> 66*7c478bd9Sstevel@tonic-gate #include <sys/tihdr.h> 67*7c478bd9Sstevel@tonic-gate #include <sys/timod.h> 68*7c478bd9Sstevel@tonic-gate #include <sys/tiuser.h> 69*7c478bd9Sstevel@tonic-gate #include <sys/t_kuser.h> 70*7c478bd9Sstevel@tonic-gate #include <sys/sysmacros.h> 71*7c478bd9Sstevel@tonic-gate 72*7c478bd9Sstevel@tonic-gate 73*7c478bd9Sstevel@tonic-gate int 74*7c478bd9Sstevel@tonic-gate t_krcvudata(TIUSER *tiptr, struct t_kunitdata *unitdata, int *type, int *uderr) 75*7c478bd9Sstevel@tonic-gate { 76*7c478bd9Sstevel@tonic-gate int len; 77*7c478bd9Sstevel@tonic-gate size_t hdrsz; 78*7c478bd9Sstevel@tonic-gate union T_primitives *pptr; 79*7c478bd9Sstevel@tonic-gate struct file *fp; 80*7c478bd9Sstevel@tonic-gate mblk_t *bp; 81*7c478bd9Sstevel@tonic-gate mblk_t *nbp; 82*7c478bd9Sstevel@tonic-gate mblk_t *mp; 83*7c478bd9Sstevel@tonic-gate mblk_t *tmp; 84*7c478bd9Sstevel@tonic-gate int error; 85*7c478bd9Sstevel@tonic-gate int flag; 86*7c478bd9Sstevel@tonic-gate 87*7c478bd9Sstevel@tonic-gate fp = tiptr->fp; 88*7c478bd9Sstevel@tonic-gate 89*7c478bd9Sstevel@tonic-gate if (type == NULL || uderr == NULL) 90*7c478bd9Sstevel@tonic-gate return (EINVAL); 91*7c478bd9Sstevel@tonic-gate 92*7c478bd9Sstevel@tonic-gate error = 0; 93*7c478bd9Sstevel@tonic-gate unitdata->udata.buf = NULL; 94*7c478bd9Sstevel@tonic-gate 95*7c478bd9Sstevel@tonic-gate if (unitdata->udata.udata_mp) { 96*7c478bd9Sstevel@tonic-gate KTLILOG(2, "t_krcvudata: freeing existing message block\n", 0); 97*7c478bd9Sstevel@tonic-gate freemsg(unitdata->udata.udata_mp); 98*7c478bd9Sstevel@tonic-gate unitdata->udata.udata_mp = NULL; 99*7c478bd9Sstevel@tonic-gate } 100*7c478bd9Sstevel@tonic-gate 101*7c478bd9Sstevel@tonic-gate /* 102*7c478bd9Sstevel@tonic-gate * XXX Grabbing a mutex to do an atomic operation seems pointless 103*7c478bd9Sstevel@tonic-gate */ 104*7c478bd9Sstevel@tonic-gate mutex_enter(&fp->f_tlock); 105*7c478bd9Sstevel@tonic-gate flag = fp->f_flag; 106*7c478bd9Sstevel@tonic-gate mutex_exit(&fp->f_tlock); 107*7c478bd9Sstevel@tonic-gate 108*7c478bd9Sstevel@tonic-gate if ((error = tli_recv(tiptr, &bp, flag)) != 0) 109*7c478bd9Sstevel@tonic-gate return (error); 110*7c478bd9Sstevel@tonic-gate 111*7c478bd9Sstevel@tonic-gate /* 112*7c478bd9Sstevel@tonic-gate * Got something 113*7c478bd9Sstevel@tonic-gate */ 114*7c478bd9Sstevel@tonic-gate switch (bp->b_datap->db_type) { 115*7c478bd9Sstevel@tonic-gate case M_PROTO: 116*7c478bd9Sstevel@tonic-gate /* LINTED pointer alignment */ 117*7c478bd9Sstevel@tonic-gate pptr = (union T_primitives *)bp->b_rptr; 118*7c478bd9Sstevel@tonic-gate switch (pptr->type) { 119*7c478bd9Sstevel@tonic-gate case T_UNITDATA_IND: 120*7c478bd9Sstevel@tonic-gate KTLILOG(2, "t_krcvudata: Got T_UNITDATA_IND\n", 0); 121*7c478bd9Sstevel@tonic-gate hdrsz = bp->b_wptr - bp->b_rptr; 122*7c478bd9Sstevel@tonic-gate 123*7c478bd9Sstevel@tonic-gate /* 124*7c478bd9Sstevel@tonic-gate * check everything for consistency 125*7c478bd9Sstevel@tonic-gate */ 126*7c478bd9Sstevel@tonic-gate if (hdrsz < TUNITDATAINDSZ || 127*7c478bd9Sstevel@tonic-gate hdrsz < (pptr->unitdata_ind.OPT_length + 128*7c478bd9Sstevel@tonic-gate pptr->unitdata_ind.OPT_offset) || 129*7c478bd9Sstevel@tonic-gate hdrsz < (pptr->unitdata_ind.SRC_length + 130*7c478bd9Sstevel@tonic-gate pptr->unitdata_ind.SRC_offset)) { 131*7c478bd9Sstevel@tonic-gate error = EPROTO; 132*7c478bd9Sstevel@tonic-gate freemsg(bp); 133*7c478bd9Sstevel@tonic-gate break; 134*7c478bd9Sstevel@tonic-gate } 135*7c478bd9Sstevel@tonic-gate 136*7c478bd9Sstevel@tonic-gate /* 137*7c478bd9Sstevel@tonic-gate * okay, so now we copy them 138*7c478bd9Sstevel@tonic-gate */ 139*7c478bd9Sstevel@tonic-gate len = MIN(pptr->unitdata_ind.SRC_length, 140*7c478bd9Sstevel@tonic-gate unitdata->addr.maxlen); 141*7c478bd9Sstevel@tonic-gate bcopy(bp->b_rptr + pptr->unitdata_ind.SRC_offset, 142*7c478bd9Sstevel@tonic-gate unitdata->addr.buf, len); 143*7c478bd9Sstevel@tonic-gate unitdata->addr.len = len; 144*7c478bd9Sstevel@tonic-gate 145*7c478bd9Sstevel@tonic-gate len = MIN(pptr->unitdata_ind.OPT_length, 146*7c478bd9Sstevel@tonic-gate unitdata->opt.maxlen); 147*7c478bd9Sstevel@tonic-gate bcopy(bp->b_rptr + pptr->unitdata_ind.OPT_offset, 148*7c478bd9Sstevel@tonic-gate unitdata->opt.buf, len); 149*7c478bd9Sstevel@tonic-gate unitdata->opt.len = len; 150*7c478bd9Sstevel@tonic-gate 151*7c478bd9Sstevel@tonic-gate bp->b_rptr += hdrsz; 152*7c478bd9Sstevel@tonic-gate 153*7c478bd9Sstevel@tonic-gate /* 154*7c478bd9Sstevel@tonic-gate * we assume that the client knows how to deal 155*7c478bd9Sstevel@tonic-gate * with a set of linked mblks, so all we do is 156*7c478bd9Sstevel@tonic-gate * make a pass and remove any that are zero 157*7c478bd9Sstevel@tonic-gate * length. 158*7c478bd9Sstevel@tonic-gate */ 159*7c478bd9Sstevel@tonic-gate nbp = NULL; 160*7c478bd9Sstevel@tonic-gate mp = bp; 161*7c478bd9Sstevel@tonic-gate while (mp) { 162*7c478bd9Sstevel@tonic-gate if (!(bp->b_wptr-bp->b_rptr)) { 163*7c478bd9Sstevel@tonic-gate KTLILOG(2, 164*7c478bd9Sstevel@tonic-gate "t_krcvudata: zero length block\n", 165*7c478bd9Sstevel@tonic-gate 0); 166*7c478bd9Sstevel@tonic-gate tmp = mp->b_cont; 167*7c478bd9Sstevel@tonic-gate if (nbp) 168*7c478bd9Sstevel@tonic-gate nbp->b_cont = tmp; 169*7c478bd9Sstevel@tonic-gate else 170*7c478bd9Sstevel@tonic-gate bp = tmp; 171*7c478bd9Sstevel@tonic-gate 172*7c478bd9Sstevel@tonic-gate freeb(mp); 173*7c478bd9Sstevel@tonic-gate mp = tmp; 174*7c478bd9Sstevel@tonic-gate } else { 175*7c478bd9Sstevel@tonic-gate nbp = mp; 176*7c478bd9Sstevel@tonic-gate mp = mp->b_cont; 177*7c478bd9Sstevel@tonic-gate } 178*7c478bd9Sstevel@tonic-gate } 179*7c478bd9Sstevel@tonic-gate #ifdef KTLIDEBUG 180*7c478bd9Sstevel@tonic-gate { 181*7c478bd9Sstevel@tonic-gate mblk_t *tp; 182*7c478bd9Sstevel@tonic-gate 183*7c478bd9Sstevel@tonic-gate tp = bp; 184*7c478bd9Sstevel@tonic-gate while (tp) { 185*7c478bd9Sstevel@tonic-gate struct datab *dbp = tp->b_datap; 186*7c478bd9Sstevel@tonic-gate frtn_t *frp = dbp->db_frtnp; 187*7c478bd9Sstevel@tonic-gate 188*7c478bd9Sstevel@tonic-gate KTLILOG(2, "t_krcvudata: bp %x, ", tp); 189*7c478bd9Sstevel@tonic-gate KTLILOG(2, "db_size %x, ", dbp->db_lim - dbp->db_base); 190*7c478bd9Sstevel@tonic-gate KTLILOG(2, "db_ref %x", dbp->db_ref); 191*7c478bd9Sstevel@tonic-gate 192*7c478bd9Sstevel@tonic-gate if (frp != NULL) 193*7c478bd9Sstevel@tonic-gate KTLILOG(2, ", func: %x", frp->free_func); 194*7c478bd9Sstevel@tonic-gate KTLILOG(2, ", arg %x\n", frp->free_arg); 195*7c478bd9Sstevel@tonic-gate } else 196*7c478bd9Sstevel@tonic-gate KTLILOG(2, "\n", 0); 197*7c478bd9Sstevel@tonic-gate tp = tp->b_cont; 198*7c478bd9Sstevel@tonic-gate } 199*7c478bd9Sstevel@tonic-gate } 200*7c478bd9Sstevel@tonic-gate #endif /* KTLIDEBUG */ 201*7c478bd9Sstevel@tonic-gate /* 202*7c478bd9Sstevel@tonic-gate * now just point the users mblk 203*7c478bd9Sstevel@tonic-gate * pointer to what we received. 204*7c478bd9Sstevel@tonic-gate */ 205*7c478bd9Sstevel@tonic-gate if (bp == NULL) { 206*7c478bd9Sstevel@tonic-gate KTLILOG(2, "t_krcvudata: No data\n", 0); 207*7c478bd9Sstevel@tonic-gate error = EPROTO; 208*7c478bd9Sstevel@tonic-gate break; 209*7c478bd9Sstevel@tonic-gate } 210*7c478bd9Sstevel@tonic-gate if (bp->b_wptr != bp->b_rptr) { 211*7c478bd9Sstevel@tonic-gate if (!IS_P2ALIGNED(bp->b_rptr, sizeof (uint32_t))) 212*7c478bd9Sstevel@tonic-gate if (!pullupmsg(bp, 213*7c478bd9Sstevel@tonic-gate bp->b_wptr - bp->b_rptr)) { 214*7c478bd9Sstevel@tonic-gate KTLILOG(1, 215*7c478bd9Sstevel@tonic-gate "t_krcvudata: pullupmsg failed\n", 0); 216*7c478bd9Sstevel@tonic-gate error = EIO; 217*7c478bd9Sstevel@tonic-gate freemsg(bp); 218*7c478bd9Sstevel@tonic-gate break; 219*7c478bd9Sstevel@tonic-gate } 220*7c478bd9Sstevel@tonic-gate unitdata->udata.buf = (char *)bp->b_rptr; 221*7c478bd9Sstevel@tonic-gate unitdata->udata.len = (uint)(bp->b_wptr - 222*7c478bd9Sstevel@tonic-gate bp->b_rptr); 223*7c478bd9Sstevel@tonic-gate 224*7c478bd9Sstevel@tonic-gate KTLILOG(2, "t_krcvudata: got %d bytes\n", 225*7c478bd9Sstevel@tonic-gate unitdata->udata.len); 226*7c478bd9Sstevel@tonic-gate unitdata->udata.udata_mp = bp; 227*7c478bd9Sstevel@tonic-gate } else { 228*7c478bd9Sstevel@tonic-gate KTLILOG(2, 229*7c478bd9Sstevel@tonic-gate "t_krcvudata: 0 length data message\n", 0); 230*7c478bd9Sstevel@tonic-gate freemsg(bp); 231*7c478bd9Sstevel@tonic-gate unitdata->udata.len = 0; 232*7c478bd9Sstevel@tonic-gate } 233*7c478bd9Sstevel@tonic-gate *type = T_DATA; 234*7c478bd9Sstevel@tonic-gate break; 235*7c478bd9Sstevel@tonic-gate 236*7c478bd9Sstevel@tonic-gate case T_UDERROR_IND: 237*7c478bd9Sstevel@tonic-gate KTLILOG(2, "t_krcvudata: Got T_UDERROR_IND\n", 0); 238*7c478bd9Sstevel@tonic-gate hdrsz = bp->b_wptr - bp->b_rptr; 239*7c478bd9Sstevel@tonic-gate 240*7c478bd9Sstevel@tonic-gate /* 241*7c478bd9Sstevel@tonic-gate * check everything for consistency 242*7c478bd9Sstevel@tonic-gate */ 243*7c478bd9Sstevel@tonic-gate if (hdrsz < TUDERRORINDSZ || 244*7c478bd9Sstevel@tonic-gate hdrsz < (pptr->uderror_ind.OPT_length + 245*7c478bd9Sstevel@tonic-gate pptr->uderror_ind.OPT_offset) || 246*7c478bd9Sstevel@tonic-gate hdrsz < (pptr->uderror_ind.DEST_length + 247*7c478bd9Sstevel@tonic-gate pptr->uderror_ind.DEST_offset)) { 248*7c478bd9Sstevel@tonic-gate error = EPROTO; 249*7c478bd9Sstevel@tonic-gate freemsg(bp); 250*7c478bd9Sstevel@tonic-gate break; 251*7c478bd9Sstevel@tonic-gate } 252*7c478bd9Sstevel@tonic-gate 253*7c478bd9Sstevel@tonic-gate if (pptr->uderror_ind.DEST_length > 254*7c478bd9Sstevel@tonic-gate (int)unitdata->addr.maxlen || 255*7c478bd9Sstevel@tonic-gate pptr->uderror_ind.OPT_length > 256*7c478bd9Sstevel@tonic-gate (int)unitdata->opt.maxlen) { 257*7c478bd9Sstevel@tonic-gate error = EMSGSIZE; 258*7c478bd9Sstevel@tonic-gate freemsg(bp); 259*7c478bd9Sstevel@tonic-gate break; 260*7c478bd9Sstevel@tonic-gate } 261*7c478bd9Sstevel@tonic-gate 262*7c478bd9Sstevel@tonic-gate /* 263*7c478bd9Sstevel@tonic-gate * okay, so now we copy them 264*7c478bd9Sstevel@tonic-gate */ 265*7c478bd9Sstevel@tonic-gate bcopy(bp->b_rptr + pptr->uderror_ind.DEST_offset, 266*7c478bd9Sstevel@tonic-gate unitdata->addr.buf, 267*7c478bd9Sstevel@tonic-gate (size_t)pptr->uderror_ind.DEST_length); 268*7c478bd9Sstevel@tonic-gate unitdata->addr.len = pptr->uderror_ind.DEST_length; 269*7c478bd9Sstevel@tonic-gate 270*7c478bd9Sstevel@tonic-gate bcopy(bp->b_rptr + pptr->uderror_ind.OPT_offset, 271*7c478bd9Sstevel@tonic-gate unitdata->opt.buf, 272*7c478bd9Sstevel@tonic-gate (size_t)pptr->uderror_ind.OPT_length); 273*7c478bd9Sstevel@tonic-gate unitdata->opt.len = pptr->uderror_ind.OPT_length; 274*7c478bd9Sstevel@tonic-gate 275*7c478bd9Sstevel@tonic-gate *uderr = pptr->uderror_ind.ERROR_type; 276*7c478bd9Sstevel@tonic-gate 277*7c478bd9Sstevel@tonic-gate unitdata->udata.buf = NULL; 278*7c478bd9Sstevel@tonic-gate unitdata->udata.udata_mp = NULL; 279*7c478bd9Sstevel@tonic-gate unitdata->udata.len = 0; 280*7c478bd9Sstevel@tonic-gate 281*7c478bd9Sstevel@tonic-gate freemsg(bp); 282*7c478bd9Sstevel@tonic-gate 283*7c478bd9Sstevel@tonic-gate *type = T_UDERR; 284*7c478bd9Sstevel@tonic-gate break; 285*7c478bd9Sstevel@tonic-gate 286*7c478bd9Sstevel@tonic-gate default: 287*7c478bd9Sstevel@tonic-gate KTLILOG(1, 288*7c478bd9Sstevel@tonic-gate "t_krcvudata: Unknown transport primitive %d\n", 289*7c478bd9Sstevel@tonic-gate pptr->type); 290*7c478bd9Sstevel@tonic-gate error = EPROTO; 291*7c478bd9Sstevel@tonic-gate freemsg(bp); 292*7c478bd9Sstevel@tonic-gate break; 293*7c478bd9Sstevel@tonic-gate } 294*7c478bd9Sstevel@tonic-gate break; 295*7c478bd9Sstevel@tonic-gate 296*7c478bd9Sstevel@tonic-gate case M_FLUSH: 297*7c478bd9Sstevel@tonic-gate KTLILOG(1, "t_krcvudata: tli_recv returned M_FLUSH\n", 0); 298*7c478bd9Sstevel@tonic-gate freemsg(bp); 299*7c478bd9Sstevel@tonic-gate *type = T_ERROR; 300*7c478bd9Sstevel@tonic-gate break; 301*7c478bd9Sstevel@tonic-gate 302*7c478bd9Sstevel@tonic-gate default: 303*7c478bd9Sstevel@tonic-gate KTLILOG(1, "t_krcvudata: unknown message type %x\n", 304*7c478bd9Sstevel@tonic-gate bp->b_datap->db_type); 305*7c478bd9Sstevel@tonic-gate freemsg(bp); 306*7c478bd9Sstevel@tonic-gate *type = T_ERROR; 307*7c478bd9Sstevel@tonic-gate break; 308*7c478bd9Sstevel@tonic-gate } 309*7c478bd9Sstevel@tonic-gate 310*7c478bd9Sstevel@tonic-gate return (error); 311*7c478bd9Sstevel@tonic-gate } 312