1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28*0Sstevel@tonic-gate /* All Rights Reserved */ 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" /* from S5R4 1.4 */ 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate /* 34*0Sstevel@tonic-gate * Transport Interface Library read/write module - issue 1 35*0Sstevel@tonic-gate */ 36*0Sstevel@tonic-gate 37*0Sstevel@tonic-gate #include <sys/types.h> 38*0Sstevel@tonic-gate #include <sys/param.h> 39*0Sstevel@tonic-gate #include <sys/stream.h> 40*0Sstevel@tonic-gate #include <sys/stropts.h> 41*0Sstevel@tonic-gate #include <sys/tihdr.h> 42*0Sstevel@tonic-gate #include <sys/debug.h> 43*0Sstevel@tonic-gate #include <sys/errno.h> 44*0Sstevel@tonic-gate #include <sys/kmem.h> 45*0Sstevel@tonic-gate #include <sys/tirdwr.h> 46*0Sstevel@tonic-gate #include <sys/conf.h> 47*0Sstevel@tonic-gate #include <sys/modctl.h> 48*0Sstevel@tonic-gate #include <sys/ddi.h> 49*0Sstevel@tonic-gate #include <sys/sunddi.h> 50*0Sstevel@tonic-gate 51*0Sstevel@tonic-gate #define ORDREL 002 52*0Sstevel@tonic-gate #define DISCON 004 53*0Sstevel@tonic-gate #define FATAL 010 54*0Sstevel@tonic-gate #define WAITACK 020 55*0Sstevel@tonic-gate #define TIRDWR_ID 4 56*0Sstevel@tonic-gate 57*0Sstevel@tonic-gate /* 58*0Sstevel@tonic-gate * Per-Stream private data structure. 59*0Sstevel@tonic-gate */ 60*0Sstevel@tonic-gate struct trw_trw { 61*0Sstevel@tonic-gate queue_t *trw_rdq; 62*0Sstevel@tonic-gate uint_t trw_flags; 63*0Sstevel@tonic-gate }; 64*0Sstevel@tonic-gate 65*0Sstevel@tonic-gate /* 66*0Sstevel@tonic-gate * stream data structure definitions 67*0Sstevel@tonic-gate */ 68*0Sstevel@tonic-gate static int tirdwropen(queue_t *q, dev_t *dev, 69*0Sstevel@tonic-gate int flag, int sflag, cred_t *cr); 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate static int tirdwrclose(queue_t *q, int flag, cred_t *cr); 72*0Sstevel@tonic-gate 73*0Sstevel@tonic-gate static int check_strhead(queue_t *q); 74*0Sstevel@tonic-gate 75*0Sstevel@tonic-gate /* 76*0Sstevel@tonic-gate * To save instructions, since STREAMS ignores the return value 77*0Sstevel@tonic-gate * from these functions, they are defined as void here. Kind of icky, but... 78*0Sstevel@tonic-gate */ 79*0Sstevel@tonic-gate static void tirdwrrput(queue_t *q, mblk_t *mp); 80*0Sstevel@tonic-gate static void tirdwrwput(queue_t *q, mblk_t *mp); 81*0Sstevel@tonic-gate 82*0Sstevel@tonic-gate static struct module_info tirdwr_info = { 83*0Sstevel@tonic-gate TIRDWR_ID, 84*0Sstevel@tonic-gate "tirdwr", 85*0Sstevel@tonic-gate 0, 86*0Sstevel@tonic-gate INFPSZ, 87*0Sstevel@tonic-gate 4096, 88*0Sstevel@tonic-gate 1024 89*0Sstevel@tonic-gate }; 90*0Sstevel@tonic-gate 91*0Sstevel@tonic-gate static struct qinit tirdwrrinit = { 92*0Sstevel@tonic-gate (int (*)())tirdwrrput, 93*0Sstevel@tonic-gate (int (*)())NULL, 94*0Sstevel@tonic-gate tirdwropen, 95*0Sstevel@tonic-gate tirdwrclose, 96*0Sstevel@tonic-gate nulldev, 97*0Sstevel@tonic-gate &tirdwr_info, 98*0Sstevel@tonic-gate NULL 99*0Sstevel@tonic-gate }; 100*0Sstevel@tonic-gate 101*0Sstevel@tonic-gate static struct qinit tirdwrwinit = { 102*0Sstevel@tonic-gate (int (*)())tirdwrwput, 103*0Sstevel@tonic-gate (int (*)())NULL, 104*0Sstevel@tonic-gate tirdwropen, 105*0Sstevel@tonic-gate tirdwrclose, 106*0Sstevel@tonic-gate nulldev, 107*0Sstevel@tonic-gate &tirdwr_info, 108*0Sstevel@tonic-gate NULL 109*0Sstevel@tonic-gate }; 110*0Sstevel@tonic-gate 111*0Sstevel@tonic-gate static struct streamtab trwinfo = { 112*0Sstevel@tonic-gate &tirdwrrinit, 113*0Sstevel@tonic-gate &tirdwrwinit, 114*0Sstevel@tonic-gate NULL, 115*0Sstevel@tonic-gate NULL 116*0Sstevel@tonic-gate }; 117*0Sstevel@tonic-gate 118*0Sstevel@tonic-gate static struct fmodsw fsw = { 119*0Sstevel@tonic-gate "tirdwr", 120*0Sstevel@tonic-gate &trwinfo, 121*0Sstevel@tonic-gate D_NEW|D_MTQPAIR|D_MP 122*0Sstevel@tonic-gate }; 123*0Sstevel@tonic-gate 124*0Sstevel@tonic-gate static struct modlstrmod modlstrmod = { 125*0Sstevel@tonic-gate &mod_strmodops, "xport interface rd/wr str mod", &fsw 126*0Sstevel@tonic-gate }; 127*0Sstevel@tonic-gate 128*0Sstevel@tonic-gate static struct modlinkage modlinkage = { 129*0Sstevel@tonic-gate MODREV_1, &modlstrmod, NULL 130*0Sstevel@tonic-gate }; 131*0Sstevel@tonic-gate 132*0Sstevel@tonic-gate int 133*0Sstevel@tonic-gate _init(void) 134*0Sstevel@tonic-gate { 135*0Sstevel@tonic-gate return (mod_install(&modlinkage)); 136*0Sstevel@tonic-gate } 137*0Sstevel@tonic-gate 138*0Sstevel@tonic-gate int 139*0Sstevel@tonic-gate _fini(void) 140*0Sstevel@tonic-gate { 141*0Sstevel@tonic-gate return (mod_remove(&modlinkage)); 142*0Sstevel@tonic-gate } 143*0Sstevel@tonic-gate 144*0Sstevel@tonic-gate int 145*0Sstevel@tonic-gate _info(struct modinfo *modinfop) 146*0Sstevel@tonic-gate { 147*0Sstevel@tonic-gate return (mod_info(&modlinkage, modinfop)); 148*0Sstevel@tonic-gate } 149*0Sstevel@tonic-gate 150*0Sstevel@tonic-gate static void send_fatal(queue_t *q, mblk_t *mp); 151*0Sstevel@tonic-gate static void strip_strhead(queue_t *q); 152*0Sstevel@tonic-gate 153*0Sstevel@tonic-gate 154*0Sstevel@tonic-gate /* 155*0Sstevel@tonic-gate * tirdwropen - open routine gets called when the 156*0Sstevel@tonic-gate * module gets pushed onto the stream. 157*0Sstevel@tonic-gate */ 158*0Sstevel@tonic-gate /*ARGSUSED*/ 159*0Sstevel@tonic-gate static int 160*0Sstevel@tonic-gate tirdwropen( 161*0Sstevel@tonic-gate queue_t *q, 162*0Sstevel@tonic-gate dev_t *dev, 163*0Sstevel@tonic-gate int flag, 164*0Sstevel@tonic-gate int sflag, 165*0Sstevel@tonic-gate cred_t *cr) 166*0Sstevel@tonic-gate { 167*0Sstevel@tonic-gate struct trw_trw *trwptr; 168*0Sstevel@tonic-gate 169*0Sstevel@tonic-gate /* check if already open */ 170*0Sstevel@tonic-gate if (q->q_ptr) { 171*0Sstevel@tonic-gate return (0); 172*0Sstevel@tonic-gate } 173*0Sstevel@tonic-gate 174*0Sstevel@tonic-gate /* 175*0Sstevel@tonic-gate * Allocate a new trw_trw struct. 176*0Sstevel@tonic-gate */ 177*0Sstevel@tonic-gate trwptr = kmem_alloc(sizeof (struct trw_trw), KM_SLEEP); 178*0Sstevel@tonic-gate 179*0Sstevel@tonic-gate /* initialize data structure */ 180*0Sstevel@tonic-gate trwptr->trw_flags = 0; 181*0Sstevel@tonic-gate trwptr->trw_rdq = q; 182*0Sstevel@tonic-gate q->q_ptr = (caddr_t)trwptr; 183*0Sstevel@tonic-gate WR(q)->q_ptr = (caddr_t)trwptr; 184*0Sstevel@tonic-gate qprocson(q); 185*0Sstevel@tonic-gate 186*0Sstevel@tonic-gate freezestr(q); 187*0Sstevel@tonic-gate 188*0Sstevel@tonic-gate (void) strqset(WR(q), QMAXPSZ, 0, (uintptr_t)WR(q)->q_next->q_maxpsz); 189*0Sstevel@tonic-gate (void) strqset(q, QMAXPSZ, 0, (uintptr_t)q->q_next->q_maxpsz); 190*0Sstevel@tonic-gate 191*0Sstevel@tonic-gate if (!check_strhead(q)) { 192*0Sstevel@tonic-gate unfreezestr(q); 193*0Sstevel@tonic-gate qprocsoff(q); 194*0Sstevel@tonic-gate kmem_free(trwptr, sizeof (struct trw_trw)); 195*0Sstevel@tonic-gate return (EPROTO); 196*0Sstevel@tonic-gate } 197*0Sstevel@tonic-gate strip_strhead(q); 198*0Sstevel@tonic-gate unfreezestr(q); 199*0Sstevel@tonic-gate 200*0Sstevel@tonic-gate return (0); 201*0Sstevel@tonic-gate } 202*0Sstevel@tonic-gate 203*0Sstevel@tonic-gate /* 204*0Sstevel@tonic-gate * tirdwrclose - This routine gets called when the module 205*0Sstevel@tonic-gate * gets popped off of the stream. 206*0Sstevel@tonic-gate */ 207*0Sstevel@tonic-gate 208*0Sstevel@tonic-gate /*ARGSUSED1*/ 209*0Sstevel@tonic-gate static int 210*0Sstevel@tonic-gate tirdwrclose(queue_t *q, int flag, cred_t *cr) 211*0Sstevel@tonic-gate { 212*0Sstevel@tonic-gate struct trw_trw *trwptr; 213*0Sstevel@tonic-gate mblk_t *mp; 214*0Sstevel@tonic-gate union T_primitives *pptr; 215*0Sstevel@tonic-gate 216*0Sstevel@tonic-gate qprocsoff(q); 217*0Sstevel@tonic-gate trwptr = (struct trw_trw *)q->q_ptr; 218*0Sstevel@tonic-gate 219*0Sstevel@tonic-gate ASSERT(trwptr != NULL); 220*0Sstevel@tonic-gate 221*0Sstevel@tonic-gate /* 222*0Sstevel@tonic-gate * Send up a T_DISCON_IND if necessary. 223*0Sstevel@tonic-gate */ 224*0Sstevel@tonic-gate if ((trwptr->trw_flags & ORDREL) && !(trwptr->trw_flags & FATAL)) 225*0Sstevel@tonic-gate if (mp = allocb(sizeof (struct T_discon_req), BPRI_LO)) { 226*0Sstevel@tonic-gate pptr = (union T_primitives *)mp->b_rptr; 227*0Sstevel@tonic-gate mp->b_wptr = mp->b_rptr + sizeof (struct T_ordrel_req); 228*0Sstevel@tonic-gate pptr->type = T_ORDREL_REQ; 229*0Sstevel@tonic-gate mp->b_datap->db_type = M_PROTO; 230*0Sstevel@tonic-gate putnext(WR(q), mp); 231*0Sstevel@tonic-gate } 232*0Sstevel@tonic-gate 233*0Sstevel@tonic-gate kmem_free(trwptr, sizeof (struct trw_trw)); 234*0Sstevel@tonic-gate 235*0Sstevel@tonic-gate return (0); 236*0Sstevel@tonic-gate } 237*0Sstevel@tonic-gate 238*0Sstevel@tonic-gate /* 239*0Sstevel@tonic-gate * tirdwrrput - Module read queue put procedure. 240*0Sstevel@tonic-gate * This is called from the module or 241*0Sstevel@tonic-gate * driver downstream. 242*0Sstevel@tonic-gate */ 243*0Sstevel@tonic-gate 244*0Sstevel@tonic-gate static void 245*0Sstevel@tonic-gate tirdwrrput(queue_t *q, mblk_t *mp) 246*0Sstevel@tonic-gate { 247*0Sstevel@tonic-gate union T_primitives *pptr; 248*0Sstevel@tonic-gate struct trw_trw *trwptr; 249*0Sstevel@tonic-gate mblk_t *tmp; 250*0Sstevel@tonic-gate 251*0Sstevel@tonic-gate trwptr = (struct trw_trw *)q->q_ptr; 252*0Sstevel@tonic-gate 253*0Sstevel@tonic-gate ASSERT(trwptr != NULL); 254*0Sstevel@tonic-gate 255*0Sstevel@tonic-gate if ((trwptr->trw_flags & FATAL) && !(trwptr->trw_flags & WAITACK)) { 256*0Sstevel@tonic-gate freemsg(mp); 257*0Sstevel@tonic-gate return; 258*0Sstevel@tonic-gate } 259*0Sstevel@tonic-gate 260*0Sstevel@tonic-gate switch (mp->b_datap->db_type) { 261*0Sstevel@tonic-gate 262*0Sstevel@tonic-gate default: 263*0Sstevel@tonic-gate putnext(q, mp); 264*0Sstevel@tonic-gate break; 265*0Sstevel@tonic-gate 266*0Sstevel@tonic-gate case M_DATA: 267*0Sstevel@tonic-gate putnext(q, mp); 268*0Sstevel@tonic-gate break; 269*0Sstevel@tonic-gate 270*0Sstevel@tonic-gate case M_PCPROTO: 271*0Sstevel@tonic-gate case M_PROTO: 272*0Sstevel@tonic-gate /* is there enough data to check type */ 273*0Sstevel@tonic-gate if ((mp->b_wptr - mp->b_rptr) < sizeof (t_scalar_t)) { 274*0Sstevel@tonic-gate /* malformed message */ 275*0Sstevel@tonic-gate freemsg(mp); 276*0Sstevel@tonic-gate break; 277*0Sstevel@tonic-gate } 278*0Sstevel@tonic-gate pptr = (union T_primitives *)mp->b_rptr; 279*0Sstevel@tonic-gate 280*0Sstevel@tonic-gate switch (pptr->type) { 281*0Sstevel@tonic-gate 282*0Sstevel@tonic-gate case T_EXDATA_IND: 283*0Sstevel@tonic-gate send_fatal(q, mp); 284*0Sstevel@tonic-gate break; 285*0Sstevel@tonic-gate case T_DATA_IND: 286*0Sstevel@tonic-gate if (msgdsize(mp) == 0) { 287*0Sstevel@tonic-gate freemsg(mp); 288*0Sstevel@tonic-gate break; 289*0Sstevel@tonic-gate } 290*0Sstevel@tonic-gate 291*0Sstevel@tonic-gate tmp = (mblk_t *)unlinkb(mp); 292*0Sstevel@tonic-gate freemsg(mp); 293*0Sstevel@tonic-gate putnext(q, tmp); 294*0Sstevel@tonic-gate break; 295*0Sstevel@tonic-gate 296*0Sstevel@tonic-gate case T_ORDREL_IND: 297*0Sstevel@tonic-gate trwptr->trw_flags |= ORDREL; 298*0Sstevel@tonic-gate mp->b_datap->db_type = M_DATA; 299*0Sstevel@tonic-gate mp->b_wptr = mp->b_rptr; 300*0Sstevel@tonic-gate putnext(q, mp); 301*0Sstevel@tonic-gate break; 302*0Sstevel@tonic-gate 303*0Sstevel@tonic-gate case T_DISCON_IND: 304*0Sstevel@tonic-gate trwptr->trw_flags |= DISCON; 305*0Sstevel@tonic-gate trwptr->trw_flags &= ~ORDREL; 306*0Sstevel@tonic-gate if (msgdsize(mp) != 0) { 307*0Sstevel@tonic-gate tmp = (mblk_t *)unlinkb(mp); 308*0Sstevel@tonic-gate putnext(q, tmp); 309*0Sstevel@tonic-gate } 310*0Sstevel@tonic-gate mp->b_datap->db_type = M_HANGUP; 311*0Sstevel@tonic-gate mp->b_wptr = mp->b_rptr; 312*0Sstevel@tonic-gate putnext(q, mp); 313*0Sstevel@tonic-gate break; 314*0Sstevel@tonic-gate 315*0Sstevel@tonic-gate default: 316*0Sstevel@tonic-gate send_fatal(q, mp); 317*0Sstevel@tonic-gate break; 318*0Sstevel@tonic-gate } 319*0Sstevel@tonic-gate } 320*0Sstevel@tonic-gate } 321*0Sstevel@tonic-gate 322*0Sstevel@tonic-gate 323*0Sstevel@tonic-gate /* 324*0Sstevel@tonic-gate * tirdwrwput - Module write queue put procedure. 325*0Sstevel@tonic-gate * This is called from the module or 326*0Sstevel@tonic-gate * stream head upstream. 327*0Sstevel@tonic-gate */ 328*0Sstevel@tonic-gate static void 329*0Sstevel@tonic-gate tirdwrwput(queue_t *q, mblk_t *mp) 330*0Sstevel@tonic-gate { 331*0Sstevel@tonic-gate struct trw_trw *trwptr; 332*0Sstevel@tonic-gate 333*0Sstevel@tonic-gate trwptr = (struct trw_trw *)q->q_ptr; 334*0Sstevel@tonic-gate 335*0Sstevel@tonic-gate ASSERT(trwptr != NULL); 336*0Sstevel@tonic-gate 337*0Sstevel@tonic-gate if (trwptr->trw_flags & FATAL) { 338*0Sstevel@tonic-gate freemsg(mp); 339*0Sstevel@tonic-gate return; 340*0Sstevel@tonic-gate } 341*0Sstevel@tonic-gate 342*0Sstevel@tonic-gate switch (mp->b_datap->db_type) { 343*0Sstevel@tonic-gate default: 344*0Sstevel@tonic-gate putnext(q, mp); 345*0Sstevel@tonic-gate break; 346*0Sstevel@tonic-gate 347*0Sstevel@tonic-gate case M_DATA: 348*0Sstevel@tonic-gate putnext(q, mp); 349*0Sstevel@tonic-gate break; 350*0Sstevel@tonic-gate 351*0Sstevel@tonic-gate case M_PROTO: 352*0Sstevel@tonic-gate case M_PCPROTO: 353*0Sstevel@tonic-gate send_fatal(q, mp); 354*0Sstevel@tonic-gate break; 355*0Sstevel@tonic-gate } 356*0Sstevel@tonic-gate } 357*0Sstevel@tonic-gate 358*0Sstevel@tonic-gate 359*0Sstevel@tonic-gate static void 360*0Sstevel@tonic-gate send_fatal(queue_t *q, mblk_t *mp) 361*0Sstevel@tonic-gate { 362*0Sstevel@tonic-gate struct trw_trw *trwptr; 363*0Sstevel@tonic-gate 364*0Sstevel@tonic-gate trwptr = (struct trw_trw *)q->q_ptr; 365*0Sstevel@tonic-gate 366*0Sstevel@tonic-gate trwptr->trw_flags |= FATAL; 367*0Sstevel@tonic-gate mp->b_datap->db_type = M_ERROR; 368*0Sstevel@tonic-gate *mp->b_datap->db_base = EPROTO; 369*0Sstevel@tonic-gate mp->b_rptr = mp->b_datap->db_base; 370*0Sstevel@tonic-gate mp->b_wptr = mp->b_datap->db_base + sizeof (char); 371*0Sstevel@tonic-gate freemsg(unlinkb(mp)); 372*0Sstevel@tonic-gate if (q->q_flag&QREADR) 373*0Sstevel@tonic-gate putnext(q, mp); 374*0Sstevel@tonic-gate else 375*0Sstevel@tonic-gate qreply(q, mp); 376*0Sstevel@tonic-gate } 377*0Sstevel@tonic-gate 378*0Sstevel@tonic-gate static int 379*0Sstevel@tonic-gate check_strhead(queue_t *q) 380*0Sstevel@tonic-gate { 381*0Sstevel@tonic-gate mblk_t *mp; 382*0Sstevel@tonic-gate union T_primitives *pptr; 383*0Sstevel@tonic-gate 384*0Sstevel@tonic-gate for (mp = q->q_next->q_first; mp != NULL; mp = mp->b_next) { 385*0Sstevel@tonic-gate 386*0Sstevel@tonic-gate switch (mp->b_datap->db_type) { 387*0Sstevel@tonic-gate case M_PROTO: 388*0Sstevel@tonic-gate pptr = (union T_primitives *)mp->b_rptr; 389*0Sstevel@tonic-gate if ((mp->b_wptr - mp->b_rptr) < sizeof (t_scalar_t)) 390*0Sstevel@tonic-gate return (0); 391*0Sstevel@tonic-gate switch (pptr->type) { 392*0Sstevel@tonic-gate 393*0Sstevel@tonic-gate case T_EXDATA_IND: 394*0Sstevel@tonic-gate return (0); 395*0Sstevel@tonic-gate case T_DATA_IND: 396*0Sstevel@tonic-gate if (mp->b_cont && 397*0Sstevel@tonic-gate (mp->b_cont->b_datap->db_type != M_DATA)) 398*0Sstevel@tonic-gate return (0); 399*0Sstevel@tonic-gate break; 400*0Sstevel@tonic-gate default: 401*0Sstevel@tonic-gate return (0); 402*0Sstevel@tonic-gate } 403*0Sstevel@tonic-gate break; 404*0Sstevel@tonic-gate 405*0Sstevel@tonic-gate case M_PCPROTO: 406*0Sstevel@tonic-gate return (0); 407*0Sstevel@tonic-gate 408*0Sstevel@tonic-gate case M_DATA: 409*0Sstevel@tonic-gate case M_SIG: 410*0Sstevel@tonic-gate break; 411*0Sstevel@tonic-gate default: 412*0Sstevel@tonic-gate return (0); 413*0Sstevel@tonic-gate } 414*0Sstevel@tonic-gate } 415*0Sstevel@tonic-gate return (1); 416*0Sstevel@tonic-gate } 417*0Sstevel@tonic-gate 418*0Sstevel@tonic-gate static void 419*0Sstevel@tonic-gate strip_strhead(queue_t *q) 420*0Sstevel@tonic-gate { 421*0Sstevel@tonic-gate mblk_t *mp; 422*0Sstevel@tonic-gate mblk_t *emp; 423*0Sstevel@tonic-gate mblk_t *tmp; 424*0Sstevel@tonic-gate union T_primitives *pptr; 425*0Sstevel@tonic-gate 426*0Sstevel@tonic-gate q = q->q_next; 427*0Sstevel@tonic-gate /*CSTYLED*/ 428*0Sstevel@tonic-gate for (mp = q->q_first; mp != NULL; ) { 429*0Sstevel@tonic-gate 430*0Sstevel@tonic-gate switch (mp->b_datap->db_type) { 431*0Sstevel@tonic-gate case M_PROTO: 432*0Sstevel@tonic-gate pptr = (union T_primitives *)mp->b_rptr; 433*0Sstevel@tonic-gate switch (pptr->type) { 434*0Sstevel@tonic-gate 435*0Sstevel@tonic-gate case T_DATA_IND: 436*0Sstevel@tonic-gate if (msgdsize(mp) == 0) { 437*0Sstevel@tonic-gate strip0: 438*0Sstevel@tonic-gate tmp = mp->b_next; 439*0Sstevel@tonic-gate rmvq(q, mp); 440*0Sstevel@tonic-gate freemsg(mp); 441*0Sstevel@tonic-gate mp = tmp; 442*0Sstevel@tonic-gate break; 443*0Sstevel@tonic-gate } 444*0Sstevel@tonic-gate emp = mp->b_next; 445*0Sstevel@tonic-gate rmvq(q, mp); 446*0Sstevel@tonic-gate tmp = (mblk_t *)unlinkb(mp); 447*0Sstevel@tonic-gate freeb(mp); 448*0Sstevel@tonic-gate (void) insq(q, emp, tmp); 449*0Sstevel@tonic-gate mp = emp; 450*0Sstevel@tonic-gate break; 451*0Sstevel@tonic-gate } 452*0Sstevel@tonic-gate break; 453*0Sstevel@tonic-gate 454*0Sstevel@tonic-gate case M_DATA: 455*0Sstevel@tonic-gate if (msgdsize(mp) == 0) 456*0Sstevel@tonic-gate goto strip0; 457*0Sstevel@tonic-gate mp = mp->b_next; 458*0Sstevel@tonic-gate break; 459*0Sstevel@tonic-gate 460*0Sstevel@tonic-gate case M_SIG: 461*0Sstevel@tonic-gate mp = mp->b_next; 462*0Sstevel@tonic-gate break; 463*0Sstevel@tonic-gate } 464*0Sstevel@tonic-gate } 465*0Sstevel@tonic-gate } 466