1 /*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)tp_pcb.c 7.18 (Berkeley) 09/26/91 8 */ 9 10 /*********************************************************** 11 Copyright IBM Corporation 1987 12 13 All Rights Reserved 14 15 Permission to use, copy, modify, and distribute this software and its 16 documentation for any purpose and without fee is hereby granted, 17 provided that the above copyright notice appear in all copies and that 18 both that copyright notice and this permission notice appear in 19 supporting documentation, and that the name of IBM not be 20 used in advertising or publicity pertaining to distribution of the 21 software without specific, written prior permission. 22 23 IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING 24 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL 25 IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR 26 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 27 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 28 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 29 SOFTWARE. 30 31 ******************************************************************/ 32 33 /* 34 * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison 35 */ 36 /* 37 * ARGO TP 38 * 39 * $Header: tp_pcb.c,v 5.4 88/11/18 17:28:24 nhall Exp $ 40 * $Source: /usr/argo/sys/netiso/RCS/tp_pcb.c,v $ 41 * 42 * 43 * This is the initialization and cleanup stuff - 44 * for the tp machine in general as well as for the individual pcbs. 45 * tp_init() is called at system startup. tp_attach() and tp_getref() are 46 * called when a socket is created. tp_detach() and tp_freeref() 47 * are called during the closing stage and/or when the reference timer 48 * goes off. 49 * tp_soisdisconnecting() and tp_soisdisconnected() are tp-specific 50 * versions of soisconnect* 51 * and are called (obviously) during the closing phase. 52 * 53 */ 54 55 #include "param.h" 56 #include "systm.h" 57 #include "mbuf.h" 58 #include "socket.h" 59 #include "socketvar.h" 60 #include "domain.h" 61 #include "protosw.h" 62 #include "errno.h" 63 #include "time.h" 64 #include "argo_debug.h" 65 #include "tp_param.h" 66 #include "tp_timer.h" 67 #include "tp_ip.h" 68 #include "tp_stat.h" 69 #include "tp_pcb.h" 70 #include "tp_tpdu.h" 71 #include "tp_trace.h" 72 #include "tp_meas.h" 73 #include "tp_seq.h" 74 #include "tp_clnp.h" 75 76 struct tp_param tp_param = { 77 1, /* configured */ 78 }; 79 80 /* ticks are in units of: 81 * 500 nano-fortnights ;-) or 82 * 500 ms or 83 * 1/2 second 84 */ 85 86 struct tp_conn_param tp_conn_param[] = { 87 /* ISO_CLNS: TP4 CONNECTION LESS */ 88 { 89 TP_NRETRANS, /* short p_Nretrans; */ 90 20, /* 10 sec */ /* short p_dr_ticks; */ 91 92 20, /* 10 sec */ /* short p_cc_ticks; */ 93 20, /* 10 sec */ /* short p_dt_ticks; */ 94 95 40, /* 20 sec */ /* short p_x_ticks; */ 96 80, /* 40 sec */ /* short p_cr_ticks;*/ 97 98 240, /* 2 min */ /* short p_keepalive_ticks;*/ 99 10, /* 5 sec */ /* short p_sendack_ticks; */ 100 101 600, /* 5 min */ /* short p_ref_ticks; */ 102 360, /* 3 min */ /* short p_inact_ticks; */ 103 104 (short) 100, /* short p_lcdtfract */ 105 (short) TP_SOCKBUFSIZE, /* short p_winsize */ 106 TP_TPDUSIZE, /* u_char p_tpdusize */ 107 108 TPACK_WINDOW, /* 4 bits p_ack_strat */ 109 TPRX_USE_CW | TPRX_FASTSTART, 110 /* 4 bits p_rx_strat*/ 111 TP_CLASS_4 | TP_CLASS_0,/* 5 bits p_class */ 112 1, /* 1 bit xtd format */ 113 1, /* 1 bit xpd service */ 114 1, /* 1 bit use_checksum */ 115 0, /* 1 bit use net xpd */ 116 0, /* 1 bit use rcc */ 117 0, /* 1 bit use efc */ 118 1, /* no disc indications */ 119 0, /* don't change params */ 120 ISO_CLNS, /* p_netservice */ 121 }, 122 /* IN_CLNS: TP4 CONNECTION LESS */ 123 { 124 TP_NRETRANS, /* short p_Nretrans; */ 125 20, /* 10 sec */ /* short p_dr_ticks; */ 126 127 20, /* 10 sec */ /* short p_cc_ticks; */ 128 20, /* 10 sec */ /* short p_dt_ticks; */ 129 130 40, /* 20 sec */ /* short p_x_ticks; */ 131 80, /* 40 sec */ /* short p_cr_ticks;*/ 132 133 240, /* 2 min */ /* short p_keepalive_ticks;*/ 134 10, /* 5 sec */ /* short p_sendack_ticks; */ 135 136 600, /* 5 min */ /* short p_ref_ticks; */ 137 360, /* 3 min */ /* short p_inact_ticks; */ 138 139 (short) 100, /* short p_lcdtfract */ 140 (short) TP_SOCKBUFSIZE, /* short p_winsize */ 141 TP_TPDUSIZE, /* u_char p_tpdusize */ 142 143 TPACK_WINDOW, /* 4 bits p_ack_strat */ 144 TPRX_USE_CW | TPRX_FASTSTART, 145 /* 4 bits p_rx_strat*/ 146 TP_CLASS_4, /* 5 bits p_class */ 147 1, /* 1 bit xtd format */ 148 1, /* 1 bit xpd service */ 149 1, /* 1 bit use_checksum */ 150 0, /* 1 bit use net xpd */ 151 0, /* 1 bit use rcc */ 152 0, /* 1 bit use efc */ 153 1, /* no disc indications */ 154 0, /* don't change params */ 155 IN_CLNS, /* p_netservice */ 156 }, 157 /* ISO_CONS: TP0 CONNECTION MODE */ 158 { 159 TP_NRETRANS, /* short p_Nretrans; */ 160 0, /* n/a */ /* short p_dr_ticks; */ 161 162 40, /* 20 sec */ /* short p_cc_ticks; */ 163 0, /* n/a */ /* short p_dt_ticks; */ 164 165 0, /* n/a */ /* short p_x_ticks; */ 166 360, /* 3 min */ /* short p_cr_ticks;*/ 167 168 0, /* n/a */ /* short p_keepalive_ticks;*/ 169 0, /* n/a */ /* short p_sendack_ticks; */ 170 171 600, /* for cr/cc to clear *//* short p_ref_ticks; */ 172 0, /* n/a */ /* short p_inact_ticks; */ 173 174 /* Use tp4 defaults just in case the user changes ONLY 175 * the class 176 */ 177 (short) 100, /* short p_lcdtfract */ 178 (short) TP0_SOCKBUFSIZE, /* short p_winsize */ 179 TP0_TPDUSIZE, /* 8 bits p_tpdusize */ 180 181 0, /* 4 bits p_ack_strat */ 182 0, /* 4 bits p_rx_strat*/ 183 TP_CLASS_0, /* 5 bits p_class */ 184 0, /* 1 bit xtd format */ 185 0, /* 1 bit xpd service */ 186 0, /* 1 bit use_checksum */ 187 0, /* 1 bit use net xpd */ 188 0, /* 1 bit use rcc */ 189 0, /* 1 bit use efc */ 190 0, /* no disc indications */ 191 0, /* don't change params */ 192 ISO_CONS, /* p_netservice */ 193 }, 194 /* ISO_COSNS: TP4 CONNECTION LESS SERVICE over CONSNS */ 195 { 196 TP_NRETRANS, /* short p_Nretrans; */ 197 40, /* 20 sec */ /* short p_dr_ticks; */ 198 199 40, /* 20 sec */ /* short p_cc_ticks; */ 200 80, /* 40 sec */ /* short p_dt_ticks; */ 201 202 120, /* 1 min */ /* short p_x_ticks; */ 203 360, /* 3 min */ /* short p_cr_ticks;*/ 204 205 360, /* 3 min */ /* short p_keepalive_ticks;*/ 206 20, /* 10 sec */ /* short p_sendack_ticks; */ 207 208 600, /* 5 min */ /* short p_ref_ticks; */ 209 480, /* 4 min */ /* short p_inact_ticks; */ 210 211 (short) 100, /* short p_lcdtfract */ 212 (short) TP0_SOCKBUFSIZE, /* short p_winsize */ 213 TP0_TPDUSIZE, /* u_char p_tpdusize */ 214 215 TPACK_WINDOW, /* 4 bits p_ack_strat */ 216 TPRX_USE_CW , /* No fast start */ 217 /* 4 bits p_rx_strat*/ 218 TP_CLASS_4 | TP_CLASS_0,/* 5 bits p_class */ 219 0, /* 1 bit xtd format */ 220 1, /* 1 bit xpd service */ 221 1, /* 1 bit use_checksum */ 222 0, /* 1 bit use net xpd */ 223 0, /* 1 bit use rcc */ 224 0, /* 1 bit use efc */ 225 0, /* no disc indications */ 226 0, /* don't change params */ 227 ISO_COSNS, /* p_netservice */ 228 }, 229 }; 230 231 #ifdef INET 232 int in_putnetaddr(); 233 int in_getnetaddr(); 234 int in_cmpnetaddr(); 235 int in_putsufx(); 236 int in_getsufx(); 237 int in_recycle_tsuffix(); 238 int tpip_mtu(); 239 int in_pcbbind(); 240 int in_pcbconnect(); 241 int in_pcbdisconnect(); 242 int in_pcbdetach(); 243 int in_pcballoc(); 244 int tpip_output(); 245 int tpip_output_dg(); 246 struct inpcb tp_inpcb; 247 #endif INET 248 #ifdef ISO 249 int iso_putnetaddr(); 250 int iso_getnetaddr(); 251 int iso_cmpnetaddr(); 252 int iso_putsufx(); 253 int iso_getsufx(); 254 int iso_recycle_tsuffix(); 255 int tpclnp_mtu(); 256 int iso_pcbbind(); 257 int iso_pcbconnect(); 258 int iso_pcbdisconnect(); 259 int iso_pcbdetach(); 260 int iso_pcballoc(); 261 int tpclnp_output(); 262 int tpclnp_output_dg(); 263 int iso_nlctloutput(); 264 struct isopcb tp_isopcb; 265 #endif ISO 266 #ifdef TPCONS 267 int iso_putnetaddr(); 268 int iso_getnetaddr(); 269 int iso_cmpnetaddr(); 270 int iso_putsufx(); 271 int iso_getsufx(); 272 int iso_recycle_tsuffix(); 273 int iso_pcbbind(); 274 int tpcons_pcbconnect(); 275 int tpclnp_mtu(); 276 int iso_pcbdisconnect(); 277 int iso_pcbdetach(); 278 int iso_pcballoc(); 279 int tpcons_output(); 280 struct isopcb tp_isopcb; 281 #endif TPCONS 282 283 284 struct nl_protosw nl_protosw[] = { 285 /* ISO_CLNS */ 286 #ifdef ISO 287 { AF_ISO, iso_putnetaddr, iso_getnetaddr, iso_cmpnetaddr, 288 iso_putsufx, iso_getsufx, 289 iso_recycle_tsuffix, 290 tpclnp_mtu, iso_pcbbind, iso_pcbconnect, 291 iso_pcbdisconnect, iso_pcbdetach, 292 iso_pcballoc, 293 tpclnp_output, tpclnp_output_dg, iso_nlctloutput, 294 (caddr_t) &tp_isopcb, 295 }, 296 #else 297 { 0 }, 298 #endif ISO 299 /* IN_CLNS */ 300 #ifdef INET 301 { AF_INET, in_putnetaddr, in_getnetaddr, in_cmpnetaddr, 302 in_putsufx, in_getsufx, 303 in_recycle_tsuffix, 304 tpip_mtu, in_pcbbind, in_pcbconnect, 305 in_pcbdisconnect, in_pcbdetach, 306 in_pcballoc, 307 tpip_output, tpip_output_dg, /* nl_ctloutput */ NULL, 308 (caddr_t) &tp_inpcb, 309 }, 310 #else 311 { 0 }, 312 #endif INET 313 /* ISO_CONS */ 314 #if defined(ISO) && defined(TPCONS) 315 { AF_ISO, iso_putnetaddr, iso_getnetaddr, iso_cmpnetaddr, 316 iso_putsufx, iso_getsufx, 317 iso_recycle_tsuffix, 318 tpclnp_mtu, iso_pcbbind, tpcons_pcbconnect, 319 iso_pcbdisconnect, iso_pcbdetach, 320 iso_pcballoc, 321 tpcons_output, tpcons_output, iso_nlctloutput, 322 (caddr_t) &tp_isopcb, 323 }, 324 #else 325 { 0 }, 326 #endif ISO_CONS 327 /* End of protosw marker */ 328 { 0 } 329 }; 330 331 /* 332 * NAME: tp_init() 333 * 334 * CALLED FROM: 335 * autoconf through the protosw structure 336 * 337 * FUNCTION: 338 * initialize tp machine 339 * 340 * RETURNS: Nada 341 * 342 * SIDE EFFECTS: 343 * 344 * NOTES: 345 */ 346 int 347 tp_init() 348 { 349 static int init_done=0; 350 void tp_timerinit(); 351 352 if (init_done++) 353 return 0; 354 355 356 /* FOR INET */ 357 tp_inpcb.inp_next = tp_inpcb.inp_prev = &tp_inpcb; 358 /* FOR ISO */ 359 tp_isopcb.isop_next = tp_isopcb.isop_prev = &tp_isopcb; 360 361 tp_start_win = 2; 362 363 tp_timerinit(); 364 bzero((caddr_t)&tp_stat, sizeof(struct tp_stat)); 365 return 0; 366 } 367 368 /* 369 * NAME: tp_soisdisconnecting() 370 * 371 * CALLED FROM: 372 * tp.trans 373 * 374 * FUNCTION and ARGUMENTS: 375 * Set state of the socket (so) to reflect that fact that we're disconnectING 376 * 377 * RETURNS: Nada 378 * 379 * SIDE EFFECTS: 380 * 381 * NOTES: 382 * This differs from the regular soisdisconnecting() in that the latter 383 * also sets the SS_CANTRECVMORE and SS_CANTSENDMORE flags. 384 * We don't want to set those flags because those flags will cause 385 * a SIGPIPE to be delivered in sosend() and we don't like that. 386 * If anyone else is sleeping on this socket, wake 'em up. 387 */ 388 void 389 tp_soisdisconnecting(so) 390 register struct socket *so; 391 { 392 soisdisconnecting(so); 393 so->so_state &= ~SS_CANTSENDMORE; 394 IFPERF(sototpcb(so)) 395 register struct tp_pcb *tpcb = sototpcb(so); 396 u_int fsufx, lsufx; 397 398 bcopy ((caddr_t)tpcb->tp_fsuffix, (caddr_t)&fsufx, sizeof(u_int) ); 399 bcopy ((caddr_t)tpcb->tp_lsuffix, (caddr_t)&lsufx, sizeof(u_int) ); 400 401 tpmeas(tpcb->tp_lref, TPtime_close, &time, fsufx, lsufx, tpcb->tp_fref); 402 tpcb->tp_perf_on = 0; /* turn perf off */ 403 ENDPERF 404 } 405 406 407 /* 408 * NAME: tp_soisdisconnected() 409 * 410 * CALLED FROM: 411 * tp.trans 412 * 413 * FUNCTION and ARGUMENTS: 414 * Set state of the socket (so) to reflect that fact that we're disconnectED 415 * Set the state of the reference structure to closed, and 416 * recycle the suffix. 417 * Start a reference timer. 418 * 419 * RETURNS: Nada 420 * 421 * SIDE EFFECTS: 422 * 423 * NOTES: 424 * This differs from the regular soisdisconnected() in that the latter 425 * also sets the SS_CANTRECVMORE and SS_CANTSENDMORE flags. 426 * We don't want to set those flags because those flags will cause 427 * a SIGPIPE to be delivered in sosend() and we don't like that. 428 * If anyone else is sleeping on this socket, wake 'em up. 429 */ 430 void 431 tp_soisdisconnected(tpcb) 432 register struct tp_pcb *tpcb; 433 { 434 register struct socket *so = tpcb->tp_sock; 435 436 soisdisconnecting(so); 437 so->so_state &= ~SS_CANTSENDMORE; 438 IFPERF(tpcb) 439 register struct tp_pcb *ttpcb = sototpcb(so); 440 u_int fsufx, lsufx; 441 442 /* CHOKE */ 443 bcopy ((caddr_t)ttpcb->tp_fsuffix, (caddr_t)&fsufx, sizeof(u_int) ); 444 bcopy ((caddr_t)ttpcb->tp_lsuffix, (caddr_t)&lsufx, sizeof(u_int) ); 445 446 tpmeas(ttpcb->tp_lref, TPtime_close, 447 &time, &lsufx, &fsufx, ttpcb->tp_fref); 448 tpcb->tp_perf_on = 0; /* turn perf off */ 449 ENDPERF 450 451 tpcb->tp_refstate = REF_FROZEN; 452 tp_recycle_tsuffix(tpcb); 453 tp_etimeout(tpcb, TM_reference, (int)tpcb->tp_refer_ticks); 454 } 455 456 /* 457 * NAME: tp_freeref() 458 * 459 * CALLED FROM: 460 * tp.trans when the reference timer goes off, and 461 * from tp_attach() and tp_detach() when a tpcb is partially set up but not 462 * set up enough to have a ref timer set for it, and it's discarded 463 * due to some sort of error or an early close() 464 * 465 * FUNCTION and ARGUMENTS: 466 * Frees the reference represented by (r) for re-use. 467 * 468 * RETURNS: Nothing 469 * 470 * SIDE EFFECTS: 471 * 472 * NOTES: better be called at clock priority !!!!! 473 */ 474 void 475 tp_freeref(r) 476 register struct tp_ref *r; 477 { 478 register struct tp_pcb *tpcb = r->tpr_pcb; 479 IFDEBUG(D_TIMER) 480 printf("tp_freeref called for ref %d maxrefopen %d\n", 481 r - tp_ref, tp_refinfo.tpr_maxopen); 482 ENDDEBUG 483 IFTRACE(D_TIMER) 484 tptrace(TPPTmisc, "tp_freeref ref maxrefopen", 485 r - tp_ref, tp_refinfo.tpr_maxopen, 0, 0); 486 ENDTRACE 487 r->tpr_state = REF_FREE; 488 IFDEBUG(D_CONN) 489 printf("tp_freeref: CLEARING tpr_pcb 0x%x\n", r->tpr_pcb); 490 ENDDEBUG 491 r->tpr_pcb = (struct tp_pcb *)0; 492 if (tpcb) 493 tpcb->tp_refp = 0; 494 495 for (r = tp_ref + tp_refinfo.tpr_maxopen; r > tp_ref; r--) 496 if (r->tpr_pcb) 497 break; 498 tp_refinfo.tpr_maxopen = r - tp_ref; 499 tp_refinfo.tpr_numopen--; 500 501 IFDEBUG(D_TIMER) 502 printf("tp_freeref ends w/ maxrefopen %d\n", tp_refinfo.tpr_maxopen); 503 ENDDEBUG 504 } 505 506 /* 507 * NAME: tp_getref() 508 * 509 * CALLED FROM: 510 * tp_attach() 511 * 512 * FUNCTION and ARGUMENTS: 513 * obtains the next free reference and allocates the appropriate 514 * ref structure, links that structure to (tpcb) 515 * 516 * RETURN VALUE: 517 * a reference number 518 * or TP_ENOREF 519 * 520 * SIDE EFFECTS: 521 * 522 * NOTES: 523 */ 524 u_long 525 tp_getref(tpcb) 526 register struct tp_pcb *tpcb; 527 { 528 register struct tp_ref *r, *rlim; 529 register int i; 530 caddr_t obase; 531 unsigned size; 532 533 if (++tp_refinfo.tpr_numopen < tp_refinfo.tpr_size) 534 for (r = tp_refinfo.tpr_base, rlim = r + tp_refinfo.tpr_size; 535 ++r < rlim; ) /* tp_ref[0] is never used */ 536 if (r->tpr_pcb == 0) 537 goto got_one; 538 /* else have to allocate more space */ 539 540 obase = (caddr_t)tp_refinfo.tpr_base; 541 size = tp_refinfo.tpr_size * sizeof(struct tp_ref); 542 r = (struct tp_ref *) malloc(size + size, M_PCB, M_NOWAIT); 543 if (r == 0) 544 return (--tp_refinfo.tpr_numopen, TP_ENOREF); 545 tp_refinfo.tpr_base = tp_ref = r; 546 tp_refinfo.tpr_size *= 2; 547 bcopy(obase, (caddr_t)r, size); 548 free(obase, M_PCB); 549 r = (struct tp_ref *)(size + (caddr_t)r); 550 bzero((caddr_t)r, size); 551 552 got_one: 553 r->tpr_pcb = tpcb; 554 r->tpr_state = REF_OPENING; 555 tpcb->tp_refp = r; 556 i = r - tp_refinfo.tpr_base; 557 if (tp_refinfo.tpr_maxopen < i) 558 tp_refinfo.tpr_maxopen = i; 559 return i; 560 } 561 562 /* 563 * NAME: tp_set_npcb() 564 * 565 * CALLED FROM: 566 * tp_attach(), tp_route_to() 567 * 568 * FUNCTION and ARGUMENTS: 569 * given a tpcb, allocate an appropriate lower-lever npcb, freeing 570 * any old ones that might need re-assigning. 571 */ 572 tp_set_npcb(tpcb) 573 register struct tp_pcb *tpcb; 574 { 575 register struct socket *so = tpcb->tp_sock; 576 int error; 577 578 if (tpcb->tp_nlproto && tpcb->tp_npcb) { 579 short so_state = so->so_state; 580 so->so_state &= ~SS_NOFDREF; 581 tpcb->tp_nlproto->nlp_pcbdetach(tpcb->tp_npcb); 582 so->so_state = so_state; 583 } 584 tpcb->tp_nlproto = &nl_protosw[tpcb->tp_netservice]; 585 /* xx_pcballoc sets so_pcb */ 586 error = tpcb->tp_nlproto->nlp_pcballoc(so, tpcb->tp_nlproto->nlp_pcblist); 587 tpcb->tp_npcb = so->so_pcb; 588 so->so_pcb = (caddr_t)tpcb; 589 return (error); 590 } 591 /* 592 * NAME: tp_attach() 593 * 594 * CALLED FROM: 595 * tp_usrreq, PRU_ATTACH 596 * 597 * FUNCTION and ARGUMENTS: 598 * given a socket (so) and a protocol family (dom), allocate a tpcb 599 * and ref structure, initialize everything in the structures that 600 * needs to be initialized. 601 * 602 * RETURN VALUE: 603 * 0 ok 604 * EINVAL if DEBUG(X) in is on and a disaster has occurred 605 * ENOPROTOOPT if TP hasn't been configured or if the 606 * socket wasn't created with tp as its protocol 607 * EISCONN if this socket is already part of a connection 608 * ETOOMANYREFS if ran out of tp reference numbers. 609 * E* whatever error is returned from soreserve() 610 * for from the network-layer pcb allocation routine 611 * 612 * SIDE EFFECTS: 613 * 614 * NOTES: 615 */ 616 tp_attach(so, protocol) 617 struct socket *so; 618 int protocol; 619 { 620 register struct tp_pcb *tpcb; 621 int error; 622 int dom = so->so_proto->pr_domain->dom_family; 623 u_long lref; 624 extern struct tp_conn_param tp_conn_param[]; 625 626 IFDEBUG(D_CONN) 627 printf("tp_attach:dom 0x%x so 0x%x ", dom, so); 628 ENDDEBUG 629 IFTRACE(D_CONN) 630 tptrace(TPPTmisc, "tp_attach:dom so", dom, so, 0, 0); 631 ENDTRACE 632 if ( ! tp_param.tpp_configed ) { 633 error = ENOPROTOOPT; /* protocol not available */ 634 goto bad2; 635 } 636 637 if (so->so_pcb != NULL) { 638 return EISCONN; /* socket already part of a connection*/ 639 } 640 641 error = soreserve(so, 2 * TP_SOCKBUFSIZE, TP_SOCKBUFSIZE); 642 /* later an ioctl will allow reallocation IF still in closed state */ 643 644 if (error) 645 goto bad2; 646 647 MALLOC(tpcb, struct tp_pcb *, sizeof(*tpcb), M_PCB, M_NOWAIT); 648 if (tpcb == NULL) { 649 error = ENOBUFS; 650 goto bad2; 651 } 652 bzero( (caddr_t)tpcb, sizeof (struct tp_pcb) ); 653 654 if ( ((lref = tp_getref(tpcb)) & TP_ENOREF) != 0 ) { 655 error = ETOOMANYREFS; 656 goto bad3; 657 } 658 tpcb->tp_lref = lref; 659 tpcb->tp_sock = so; 660 tpcb->tp_domain = dom; 661 /* tpcb->tp_proto = protocol; someday maybe? */ 662 if (protocol && protocol<ISOPROTO_TP4) { 663 tpcb->tp_netservice = ISO_CONS; 664 tpcb->tp_snduna = (SeqNum) -1;/* kludge so the pseudo-ack from the CR/CC 665 * will generate correct fake-ack values 666 */ 667 } else { 668 tpcb->tp_netservice = (dom== AF_INET)?IN_CLNS:ISO_CLNS; 669 /* the default */ 670 } 671 tpcb->_tp_param = tp_conn_param[tpcb->tp_netservice]; 672 673 tpcb->tp_state = TP_CLOSED; 674 tpcb->tp_vers = TP_VERSION; 675 tpcb->tp_notdetached = 1; 676 677 /* Spec says default is 128 octets, 678 * that is, if the tpdusize argument never appears, use 128. 679 * As the initiator, we will always "propose" the 2048 680 * size, that is, we will put this argument in the CR 681 * always, but accept what the other side sends on the CC. 682 * If the initiator sends us something larger on a CR, 683 * we'll respond w/ this. 684 * Our maximum is 4096. See tp_chksum.c comments. 685 */ 686 tpcb->tp_cong_win = 687 tpcb->tp_l_tpdusize = 1 << tpcb->tp_tpdusize; 688 689 tpcb->tp_seqmask = TP_NML_FMT_MASK; 690 tpcb->tp_seqbit = TP_NML_FMT_BIT; 691 tpcb->tp_seqhalf = tpcb->tp_seqbit >> 1; 692 693 /* attach to a network-layer protoswitch */ 694 if ( error = tp_set_npcb(tpcb)) 695 goto bad4; 696 ASSERT( tpcb->tp_nlproto->nlp_afamily == tpcb->tp_domain); 697 698 /* nothing to do for iso case */ 699 if( dom == AF_INET ) 700 sotoinpcb(so)->inp_ppcb = (caddr_t) tpcb; 701 702 return 0; 703 704 bad4: 705 IFDEBUG(D_CONN) 706 printf("BAD4 in tp_attach, so 0x%x\n", so); 707 ENDDEBUG 708 tp_freeref(tpcb->tp_refp); 709 710 bad3: 711 IFDEBUG(D_CONN) 712 printf("BAD3 in tp_attach, so 0x%x\n", so); 713 ENDDEBUG 714 715 free((caddr_t)tpcb, M_PCB); /* never a cluster */ 716 717 bad2: 718 IFDEBUG(D_CONN) 719 printf("BAD2 in tp_attach, so 0x%x\n", so); 720 ENDDEBUG 721 so->so_pcb = 0; 722 723 /*bad:*/ 724 IFDEBUG(D_CONN) 725 printf("BAD in tp_attach, so 0x%x\n", so); 726 ENDDEBUG 727 return error; 728 } 729 730 /* 731 * NAME: tp_detach() 732 * 733 * CALLED FROM: 734 * tp.trans, on behalf of a user close request 735 * and when the reference timer goes off 736 * (if the disconnect was initiated by the protocol entity 737 * rather than by the user) 738 * 739 * FUNCTION and ARGUMENTS: 740 * remove the tpcb structure from the list of active or 741 * partially active connections, recycle all the mbufs 742 * associated with the pcb, ref structure, sockbufs, etc. 743 * Only free the ref structure if you know that a ref timer 744 * wasn't set for this tpcb. 745 * 746 * RETURNS: Nada 747 * 748 * SIDE EFFECTS: 749 * 750 * NOTES: 751 * tp_soisdisconnected() was already when this is called 752 */ 753 void 754 tp_detach(tpcb) 755 register struct tp_pcb *tpcb; 756 { 757 void tp_freeref(), tp_rsyflush(); 758 register struct socket *so = tpcb->tp_sock; 759 760 IFDEBUG(D_CONN) 761 printf("tp_detach(tpcb 0x%x, so 0x%x)\n", 762 tpcb,so); 763 ENDDEBUG 764 IFTRACE(D_CONN) 765 tptraceTPCB(TPPTmisc, "tp_detach tpcb so lsufx", 766 tpcb, so, *(u_short *)(tpcb->tp_lsuffix), 0); 767 ENDTRACE 768 769 IFDEBUG(D_CONN) 770 printf("so_snd at 0x%x so_rcv at 0x%x\n", &so->so_snd, &so->so_rcv); 771 dump_mbuf(so->so_snd.sb_mb, "so_snd at detach "); 772 printf("about to call LL detach, nlproto 0x%x, nl_detach 0x%x\n", 773 tpcb->tp_nlproto, tpcb->tp_nlproto->nlp_pcbdetach); 774 ENDDEBUG 775 776 if (tpcb->tp_Xsnd.sb_mb) { 777 printf("Unsent Xdata on detach; would panic"); 778 sbflush(&tpcb->tp_Xsnd); 779 } 780 if (tpcb->tp_ucddata) 781 m_freem(tpcb->tp_ucddata); 782 783 IFDEBUG(D_CONN) 784 printf("reassembly info cnt %d rsyq 0x%x\n", 785 tpcb->tp_rsycnt, tpcb->tp_rsyq); 786 ENDDEBUG 787 if (tpcb->tp_rsyq) 788 tp_rsyflush(tpcb); 789 790 if (tpcb->tp_next) { 791 remque(tpcb); 792 tpcb->tp_next = tpcb->tp_prev = 0; 793 } 794 tpcb->tp_notdetached = 0; 795 796 IFDEBUG(D_CONN) 797 printf("calling (...nlproto->...)(0x%x, so 0x%x)\n", 798 tpcb->tp_npcb, so); 799 printf("so 0x%x so_head 0x%x, qlen %d q0len %d qlimit %d\n", 800 so, so->so_head, 801 so->so_q0len, so->so_qlen, so->so_qlimit); 802 ENDDEBUG 803 804 (tpcb->tp_nlproto->nlp_pcbdetach)(tpcb->tp_npcb); 805 /* does an so->so_pcb = 0; sofree(so) */ 806 807 IFDEBUG(D_CONN) 808 printf("after xxx_pcbdetach\n"); 809 ENDDEBUG 810 811 if (tpcb->tp_state == TP_LISTENING) { 812 register struct tp_pcb **tt; 813 for (tt = &tp_listeners; *tt; tt = &((*tt)->tp_nextlisten)) 814 if (*tt == tpcb) 815 break; 816 if (*tt) 817 *tt = tpcb->tp_nextlisten; 818 else 819 printf("tp_detach from listen: should panic\n"); 820 } 821 if (tpcb->tp_refp && tpcb->tp_refp->tpr_state == REF_OPENING ) { 822 /* no connection existed here so no reference timer will be called */ 823 IFDEBUG(D_CONN) 824 printf("SETTING ref %d, 0x%x to REF_FREE\n", tpcb->tp_lref, 825 tpcb->tp_refp - &tp_ref[0]); 826 ENDDEBUG 827 828 tp_freeref(tpcb->tp_refp); 829 } 830 #ifdef TP_PERF_MEAS 831 /* 832 * Get rid of the cluster mbuf allocated for performance measurements, if 833 * there is one. Note that tpcb->tp_perf_on says nothing about whether or 834 * not a cluster mbuf was allocated, so you have to check for a pointer 835 * to one (that is, we need the TP_PERF_MEASs around the following section 836 * of code, not the IFPERFs) 837 */ 838 if (tpcb->tp_p_mbuf) { 839 register struct mbuf *m = tpcb->tp_p_mbuf; 840 struct mbuf *n; 841 IFDEBUG(D_PERF_MEAS) 842 printf("freeing tp_p_meas 0x%x ", tpcb->tp_p_meas); 843 ENDDEBUG 844 do { 845 MFREE(m, n); 846 m = n; 847 } while (n); 848 tpcb->tp_p_meas = 0; 849 tpcb->tp_p_mbuf = 0; 850 } 851 #endif TP_PERF_MEAS 852 853 IFDEBUG(D_CONN) 854 printf( "end of detach, NOT single, tpcb 0x%x\n", tpcb); 855 ENDDEBUG 856 /* free((caddr_t)tpcb, M_PCB); WHere to put this ? */ 857 } 858 859 struct que { 860 struct tp_pcb *next; 861 struct tp_pcb *prev; 862 } tp_bound_pcbs = 863 {(struct tp_pcb *)&tp_bound_pcbs, (struct tp_pcb *)&tp_bound_pcbs}; 864 865 u_short tp_unique; 866 867 tp_tselinuse(tlen, tsel, siso, reuseaddr) 868 caddr_t tsel; 869 register struct sockaddr_iso *siso; 870 { 871 struct tp_pcb *b = tp_bound_pcbs.next, *l = tp_listeners; 872 register struct tp_pcb *t; 873 874 for (;;) { 875 if (b != (struct tp_pcb *)&tp_bound_pcbs) { 876 t = b; b = t->tp_next; 877 } else if (l) { 878 t = l; l = t->tp_nextlisten; 879 } else 880 break; 881 if (tlen == t->tp_lsuffixlen && bcmp(tsel, t->tp_lsuffix, tlen) == 0) { 882 if (t->tp_flags & TPF_GENERAL_ADDR) { 883 if (siso == 0 || reuseaddr == 0) 884 return 1; 885 } else if (siso) { 886 if (siso->siso_family == t->tp_domain && 887 t->tp_nlproto->nlp_cmpnetaddr(t->tp_npcb, siso, TP_LOCAL)) 888 return 1; 889 } else if (reuseaddr == 0) 890 return 1; 891 } 892 } 893 return 0; 894 895 } 896 897 898 tp_pcbbind(tpcb, nam) 899 register struct tp_pcb *tpcb; 900 register struct mbuf *nam; 901 { 902 register struct sockaddr_iso *siso = 0; 903 int tlen = 0, wrapped = 0; 904 caddr_t tsel; 905 u_short tutil; 906 907 if (tpcb->tp_state != TP_CLOSED) 908 return (EINVAL); 909 if (nam) { 910 siso = mtod(nam, struct sockaddr_iso *); 911 switch (siso->siso_family) { 912 default: 913 return (EAFNOSUPPORT); 914 #ifdef ISO 915 case AF_ISO: 916 tlen = siso->siso_tlen; 917 tsel = TSEL(siso); 918 if (siso->siso_nlen == 0) 919 siso = 0; 920 break; 921 #endif 922 #ifdef INET 923 case AF_INET: 924 tsel = (caddr_t)&tutil; 925 if (tutil = ((struct sockaddr_in *)siso)->sin_port) { 926 tlen = 2; 927 } 928 if (((struct sockaddr_in *)siso)->sin_addr.s_addr == 0) 929 siso = 0; 930 } 931 #endif 932 } 933 if (tpcb->tp_lsuffixlen == 0) { 934 if (tlen) { 935 if (tp_tselinuse(tlen, tsel, siso, 936 tpcb->tp_sock->so_options & SO_REUSEADDR)) 937 return (EINVAL); 938 } else for (tsel = (caddr_t)&tp_unique, tlen = 2;;){ 939 if (tp_unique++ < ISO_PORT_RESERVED || 940 tp_unique > ISO_PORT_USERRESERVED) { 941 if (wrapped++) 942 return ESRCH; 943 tp_unique = ISO_PORT_RESERVED; 944 } 945 if (tp_tselinuse(tlen, tsel, siso, 0) == 0) 946 break; 947 } 948 bcopy(tsel, tpcb->tp_lsuffix, (tpcb->tp_lsuffixlen = tlen)); 949 insque(tpcb, &tp_bound_pcbs); 950 } else { 951 if (tlen || siso == 0) 952 return (EINVAL); 953 } 954 if (siso == 0) { 955 tpcb->tp_flags |= TPF_GENERAL_ADDR; 956 return (0); 957 } 958 return tpcb->tp_nlproto->nlp_pcbbind(tpcb->tp_npcb, nam); 959 } 960