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 7.19 (Berkeley) 09/30/91 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(n) 476 RefNum n; 477 { 478 register struct tp_ref *r = tp_ref + n; 479 register struct tp_pcb *tpcb; 480 481 tpcb = r->tpr_pcb; 482 IFDEBUG(D_TIMER) 483 printf("tp_freeref called for ref %d pcb %x maxrefopen %d\n", 484 n, tpcb, tp_refinfo.tpr_maxopen); 485 ENDDEBUG 486 IFTRACE(D_TIMER) 487 tptrace(TPPTmisc, "tp_freeref ref maxrefopen pcb", 488 n, tp_refinfo.tpr_maxopen, tpcb, 0); 489 ENDTRACE 490 if (tpcb == 0) 491 return; 492 IFDEBUG(D_CONN) 493 printf("tp_freeref: CLEARING tpr_pcb 0x%x\n", tpcb); 494 ENDDEBUG 495 r->tpr_pcb = (struct tp_pcb *)0; 496 tpcb->tp_refstate = REF_FREE; 497 498 for (r = tp_ref + tp_refinfo.tpr_maxopen; r > tp_ref; r--) 499 if (r->tpr_pcb) 500 break; 501 tp_refinfo.tpr_maxopen = r - tp_ref; 502 tp_refinfo.tpr_numopen--; 503 504 IFDEBUG(D_TIMER) 505 printf("tp_freeref ends w/ maxrefopen %d\n", tp_refinfo.tpr_maxopen); 506 ENDDEBUG 507 } 508 509 /* 510 * NAME: tp_getref() 511 * 512 * CALLED FROM: 513 * tp_attach() 514 * 515 * FUNCTION and ARGUMENTS: 516 * obtains the next free reference and allocates the appropriate 517 * ref structure, links that structure to (tpcb) 518 * 519 * RETURN VALUE: 520 * a reference number 521 * or TP_ENOREF 522 * 523 * SIDE EFFECTS: 524 * 525 * NOTES: 526 */ 527 u_long 528 tp_getref(tpcb) 529 register struct tp_pcb *tpcb; 530 { 531 register struct tp_ref *r, *rlim; 532 register int i; 533 caddr_t obase; 534 unsigned size; 535 536 if (++tp_refinfo.tpr_numopen < tp_refinfo.tpr_size) 537 for (r = tp_refinfo.tpr_base, rlim = r + tp_refinfo.tpr_size; 538 ++r < rlim; ) /* tp_ref[0] is never used */ 539 if (r->tpr_pcb == 0) 540 goto got_one; 541 /* else have to allocate more space */ 542 543 obase = (caddr_t)tp_refinfo.tpr_base; 544 size = tp_refinfo.tpr_size * sizeof(struct tp_ref); 545 r = (struct tp_ref *) malloc(size + size, M_PCB, M_NOWAIT); 546 if (r == 0) 547 return (--tp_refinfo.tpr_numopen, TP_ENOREF); 548 tp_refinfo.tpr_base = tp_ref = r; 549 tp_refinfo.tpr_size *= 2; 550 bcopy(obase, (caddr_t)r, size); 551 free(obase, M_PCB); 552 r = (struct tp_ref *)(size + (caddr_t)r); 553 bzero((caddr_t)r, size); 554 555 got_one: 556 r->tpr_pcb = tpcb; 557 tpcb->tp_refstate = REF_OPENING; 558 i = r - tp_refinfo.tpr_base; 559 if (tp_refinfo.tpr_maxopen < i) 560 tp_refinfo.tpr_maxopen = i; 561 return (u_long)i; 562 } 563 564 /* 565 * NAME: tp_set_npcb() 566 * 567 * CALLED FROM: 568 * tp_attach(), tp_route_to() 569 * 570 * FUNCTION and ARGUMENTS: 571 * given a tpcb, allocate an appropriate lower-lever npcb, freeing 572 * any old ones that might need re-assigning. 573 */ 574 tp_set_npcb(tpcb) 575 register struct tp_pcb *tpcb; 576 { 577 register struct socket *so = tpcb->tp_sock; 578 int error; 579 580 if (tpcb->tp_nlproto && tpcb->tp_npcb) { 581 short so_state = so->so_state; 582 so->so_state &= ~SS_NOFDREF; 583 tpcb->tp_nlproto->nlp_pcbdetach(tpcb->tp_npcb); 584 so->so_state = so_state; 585 } 586 tpcb->tp_nlproto = &nl_protosw[tpcb->tp_netservice]; 587 /* xx_pcballoc sets so_pcb */ 588 error = tpcb->tp_nlproto->nlp_pcballoc(so, tpcb->tp_nlproto->nlp_pcblist); 589 tpcb->tp_npcb = so->so_pcb; 590 so->so_pcb = (caddr_t)tpcb; 591 return (error); 592 } 593 /* 594 * NAME: tp_attach() 595 * 596 * CALLED FROM: 597 * tp_usrreq, PRU_ATTACH 598 * 599 * FUNCTION and ARGUMENTS: 600 * given a socket (so) and a protocol family (dom), allocate a tpcb 601 * and ref structure, initialize everything in the structures that 602 * needs to be initialized. 603 * 604 * RETURN VALUE: 605 * 0 ok 606 * EINVAL if DEBUG(X) in is on and a disaster has occurred 607 * ENOPROTOOPT if TP hasn't been configured or if the 608 * socket wasn't created with tp as its protocol 609 * EISCONN if this socket is already part of a connection 610 * ETOOMANYREFS if ran out of tp reference numbers. 611 * E* whatever error is returned from soreserve() 612 * for from the network-layer pcb allocation routine 613 * 614 * SIDE EFFECTS: 615 * 616 * NOTES: 617 */ 618 tp_attach(so, protocol) 619 struct socket *so; 620 int protocol; 621 { 622 register struct tp_pcb *tpcb; 623 int error; 624 int dom = so->so_proto->pr_domain->dom_family; 625 u_long lref; 626 extern struct tp_conn_param tp_conn_param[]; 627 628 IFDEBUG(D_CONN) 629 printf("tp_attach:dom 0x%x so 0x%x ", dom, so); 630 ENDDEBUG 631 IFTRACE(D_CONN) 632 tptrace(TPPTmisc, "tp_attach:dom so", dom, so, 0, 0); 633 ENDTRACE 634 if ( ! tp_param.tpp_configed ) { 635 error = ENOPROTOOPT; /* protocol not available */ 636 goto bad2; 637 } 638 639 if (so->so_pcb != NULL) { 640 return EISCONN; /* socket already part of a connection*/ 641 } 642 643 error = soreserve(so, 2 * TP_SOCKBUFSIZE, TP_SOCKBUFSIZE); 644 /* later an ioctl will allow reallocation IF still in closed state */ 645 646 if (error) 647 goto bad2; 648 649 MALLOC(tpcb, struct tp_pcb *, sizeof(*tpcb), M_PCB, M_NOWAIT); 650 if (tpcb == NULL) { 651 error = ENOBUFS; 652 goto bad2; 653 } 654 bzero( (caddr_t)tpcb, sizeof (struct tp_pcb) ); 655 656 if ( ((lref = tp_getref(tpcb)) & TP_ENOREF) != 0 ) { 657 error = ETOOMANYREFS; 658 goto bad3; 659 } 660 tpcb->tp_lref = lref; 661 tpcb->tp_sock = so; 662 tpcb->tp_domain = dom; 663 /* tpcb->tp_proto = protocol; someday maybe? */ 664 if (protocol && protocol<ISOPROTO_TP4) { 665 tpcb->tp_netservice = ISO_CONS; 666 tpcb->tp_snduna = (SeqNum) -1;/* kludge so the pseudo-ack from the CR/CC 667 * will generate correct fake-ack values 668 */ 669 } else { 670 tpcb->tp_netservice = (dom== AF_INET)?IN_CLNS:ISO_CLNS; 671 /* the default */ 672 } 673 tpcb->_tp_param = tp_conn_param[tpcb->tp_netservice]; 674 675 tpcb->tp_state = TP_CLOSED; 676 tpcb->tp_vers = TP_VERSION; 677 tpcb->tp_notdetached = 1; 678 679 /* Spec says default is 128 octets, 680 * that is, if the tpdusize argument never appears, use 128. 681 * As the initiator, we will always "propose" the 2048 682 * size, that is, we will put this argument in the CR 683 * always, but accept what the other side sends on the CC. 684 * If the initiator sends us something larger on a CR, 685 * we'll respond w/ this. 686 * Our maximum is 4096. See tp_chksum.c comments. 687 */ 688 tpcb->tp_cong_win = 689 tpcb->tp_l_tpdusize = 1 << tpcb->tp_tpdusize; 690 691 tpcb->tp_seqmask = TP_NML_FMT_MASK; 692 tpcb->tp_seqbit = TP_NML_FMT_BIT; 693 tpcb->tp_seqhalf = tpcb->tp_seqbit >> 1; 694 695 /* attach to a network-layer protoswitch */ 696 if ( error = tp_set_npcb(tpcb)) 697 goto bad4; 698 ASSERT( tpcb->tp_nlproto->nlp_afamily == tpcb->tp_domain); 699 700 /* nothing to do for iso case */ 701 if( dom == AF_INET ) 702 sotoinpcb(so)->inp_ppcb = (caddr_t) tpcb; 703 704 return 0; 705 706 bad4: 707 IFDEBUG(D_CONN) 708 printf("BAD4 in tp_attach, so 0x%x\n", so); 709 ENDDEBUG 710 tp_freeref(tpcb->tp_lref); 711 712 bad3: 713 IFDEBUG(D_CONN) 714 printf("BAD3 in tp_attach, so 0x%x\n", so); 715 ENDDEBUG 716 717 free((caddr_t)tpcb, M_PCB); /* never a cluster */ 718 719 bad2: 720 IFDEBUG(D_CONN) 721 printf("BAD2 in tp_attach, so 0x%x\n", so); 722 ENDDEBUG 723 so->so_pcb = 0; 724 725 /*bad:*/ 726 IFDEBUG(D_CONN) 727 printf("BAD in tp_attach, so 0x%x\n", so); 728 ENDDEBUG 729 return error; 730 } 731 732 /* 733 * NAME: tp_detach() 734 * 735 * CALLED FROM: 736 * tp.trans, on behalf of a user close request 737 * and when the reference timer goes off 738 * (if the disconnect was initiated by the protocol entity 739 * rather than by the user) 740 * 741 * FUNCTION and ARGUMENTS: 742 * remove the tpcb structure from the list of active or 743 * partially active connections, recycle all the mbufs 744 * associated with the pcb, ref structure, sockbufs, etc. 745 * Only free the ref structure if you know that a ref timer 746 * wasn't set for this tpcb. 747 * 748 * RETURNS: Nada 749 * 750 * SIDE EFFECTS: 751 * 752 * NOTES: 753 * tp_soisdisconnected() was already when this is called 754 */ 755 void 756 tp_detach(tpcb) 757 register struct tp_pcb *tpcb; 758 { 759 void tp_freeref(), tp_rsyflush(); 760 register struct socket *so = tpcb->tp_sock; 761 762 IFDEBUG(D_CONN) 763 printf("tp_detach(tpcb 0x%x, so 0x%x)\n", 764 tpcb,so); 765 ENDDEBUG 766 IFTRACE(D_CONN) 767 tptraceTPCB(TPPTmisc, "tp_detach tpcb so lsufx", 768 tpcb, so, *(u_short *)(tpcb->tp_lsuffix), 0); 769 ENDTRACE 770 771 IFDEBUG(D_CONN) 772 printf("so_snd at 0x%x so_rcv at 0x%x\n", &so->so_snd, &so->so_rcv); 773 dump_mbuf(so->so_snd.sb_mb, "so_snd at detach "); 774 printf("about to call LL detach, nlproto 0x%x, nl_detach 0x%x\n", 775 tpcb->tp_nlproto, tpcb->tp_nlproto->nlp_pcbdetach); 776 ENDDEBUG 777 778 if (tpcb->tp_Xsnd.sb_mb) { 779 printf("Unsent Xdata on detach; would panic"); 780 sbflush(&tpcb->tp_Xsnd); 781 } 782 if (tpcb->tp_ucddata) 783 m_freem(tpcb->tp_ucddata); 784 785 IFDEBUG(D_CONN) 786 printf("reassembly info cnt %d rsyq 0x%x\n", 787 tpcb->tp_rsycnt, tpcb->tp_rsyq); 788 ENDDEBUG 789 if (tpcb->tp_rsyq) 790 tp_rsyflush(tpcb); 791 792 if (tpcb->tp_next) { 793 remque(tpcb); 794 tpcb->tp_next = tpcb->tp_prev = 0; 795 } 796 tpcb->tp_notdetached = 0; 797 798 IFDEBUG(D_CONN) 799 printf("calling (...nlproto->...)(0x%x, so 0x%x)\n", 800 tpcb->tp_npcb, so); 801 printf("so 0x%x so_head 0x%x, qlen %d q0len %d qlimit %d\n", 802 so, so->so_head, 803 so->so_q0len, so->so_qlen, so->so_qlimit); 804 ENDDEBUG 805 806 (tpcb->tp_nlproto->nlp_pcbdetach)(tpcb->tp_npcb); 807 /* does an so->so_pcb = 0; sofree(so) */ 808 809 IFDEBUG(D_CONN) 810 printf("after xxx_pcbdetach\n"); 811 ENDDEBUG 812 813 if (tpcb->tp_state == TP_LISTENING) { 814 register struct tp_pcb **tt; 815 for (tt = &tp_listeners; *tt; tt = &((*tt)->tp_nextlisten)) 816 if (*tt == tpcb) 817 break; 818 if (*tt) 819 *tt = tpcb->tp_nextlisten; 820 else 821 printf("tp_detach from listen: should panic\n"); 822 } 823 if (tpcb->tp_refstate == REF_OPENING ) { 824 /* no connection existed here so no reference timer will be called */ 825 IFDEBUG(D_CONN) 826 printf("SETTING ref %d to REF_FREE\n", tpcb->tp_lref); 827 ENDDEBUG 828 829 tp_freeref(tpcb->tp_lref); 830 } 831 #ifdef TP_PERF_MEAS 832 /* 833 * Get rid of the cluster mbuf allocated for performance measurements, if 834 * there is one. Note that tpcb->tp_perf_on says nothing about whether or 835 * not a cluster mbuf was allocated, so you have to check for a pointer 836 * to one (that is, we need the TP_PERF_MEASs around the following section 837 * of code, not the IFPERFs) 838 */ 839 if (tpcb->tp_p_mbuf) { 840 register struct mbuf *m = tpcb->tp_p_mbuf; 841 struct mbuf *n; 842 IFDEBUG(D_PERF_MEAS) 843 printf("freeing tp_p_meas 0x%x ", tpcb->tp_p_meas); 844 ENDDEBUG 845 do { 846 MFREE(m, n); 847 m = n; 848 } while (n); 849 tpcb->tp_p_meas = 0; 850 tpcb->tp_p_mbuf = 0; 851 } 852 #endif TP_PERF_MEAS 853 854 IFDEBUG(D_CONN) 855 printf( "end of detach, NOT single, tpcb 0x%x\n", tpcb); 856 ENDDEBUG 857 /* free((caddr_t)tpcb, M_PCB); WHere to put this ? */ 858 } 859 860 struct que { 861 struct tp_pcb *next; 862 struct tp_pcb *prev; 863 } tp_bound_pcbs = 864 {(struct tp_pcb *)&tp_bound_pcbs, (struct tp_pcb *)&tp_bound_pcbs}; 865 866 u_short tp_unique; 867 868 tp_tselinuse(tlen, tsel, siso, reuseaddr) 869 caddr_t tsel; 870 register struct sockaddr_iso *siso; 871 { 872 struct tp_pcb *b = tp_bound_pcbs.next, *l = tp_listeners; 873 register struct tp_pcb *t; 874 875 for (;;) { 876 if (b != (struct tp_pcb *)&tp_bound_pcbs) { 877 t = b; b = t->tp_next; 878 } else if (l) { 879 t = l; l = t->tp_nextlisten; 880 } else 881 break; 882 if (tlen == t->tp_lsuffixlen && bcmp(tsel, t->tp_lsuffix, tlen) == 0) { 883 if (t->tp_flags & TPF_GENERAL_ADDR) { 884 if (siso == 0 || reuseaddr == 0) 885 return 1; 886 } else if (siso) { 887 if (siso->siso_family == t->tp_domain && 888 t->tp_nlproto->nlp_cmpnetaddr(t->tp_npcb, siso, TP_LOCAL)) 889 return 1; 890 } else if (reuseaddr == 0) 891 return 1; 892 } 893 } 894 return 0; 895 896 } 897 898 899 tp_pcbbind(tpcb, nam) 900 register struct tp_pcb *tpcb; 901 register struct mbuf *nam; 902 { 903 register struct sockaddr_iso *siso = 0; 904 int tlen = 0, wrapped = 0; 905 caddr_t tsel; 906 u_short tutil; 907 908 if (tpcb->tp_state != TP_CLOSED) 909 return (EINVAL); 910 if (nam) { 911 siso = mtod(nam, struct sockaddr_iso *); 912 switch (siso->siso_family) { 913 default: 914 return (EAFNOSUPPORT); 915 #ifdef ISO 916 case AF_ISO: 917 tlen = siso->siso_tlen; 918 tsel = TSEL(siso); 919 if (siso->siso_nlen == 0) 920 siso = 0; 921 break; 922 #endif 923 #ifdef INET 924 case AF_INET: 925 tsel = (caddr_t)&tutil; 926 if (tutil = ((struct sockaddr_in *)siso)->sin_port) { 927 tlen = 2; 928 } 929 if (((struct sockaddr_in *)siso)->sin_addr.s_addr == 0) 930 siso = 0; 931 } 932 #endif 933 } 934 if (tpcb->tp_lsuffixlen == 0) { 935 if (tlen) { 936 if (tp_tselinuse(tlen, tsel, siso, 937 tpcb->tp_sock->so_options & SO_REUSEADDR)) 938 return (EINVAL); 939 } else for (tsel = (caddr_t)&tp_unique, tlen = 2;;){ 940 if (tp_unique++ < ISO_PORT_RESERVED || 941 tp_unique > ISO_PORT_USERRESERVED) { 942 if (wrapped++) 943 return ESRCH; 944 tp_unique = ISO_PORT_RESERVED; 945 } 946 if (tp_tselinuse(tlen, tsel, siso, 0) == 0) 947 break; 948 } 949 bcopy(tsel, tpcb->tp_lsuffix, (tpcb->tp_lsuffixlen = tlen)); 950 insque(tpcb, &tp_bound_pcbs); 951 } else { 952 if (tlen || siso == 0) 953 return (EINVAL); 954 } 955 if (siso == 0) { 956 tpcb->tp_flags |= TPF_GENERAL_ADDR; 957 return (0); 958 } 959 return tpcb->tp_nlproto->nlp_pcbbind(tpcb->tp_npcb, nam); 960 } 961