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_usrreq.c 7.21 (Berkeley) 08/28/91 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_usrreq.c,v 5.4 88/11/18 17:29:18 nhall Exp $ 40 * $Source: /usr/argo/sys/netiso/RCS/tp_usrreq.c,v $ 41 * 42 * tp_usrreq(), the fellow that gets called from most of the socket code. 43 * Pretty straighforward. 44 * THe only really awful stuff here is the OOB processing, which is done 45 * wholly here. 46 * tp_rcvoob() and tp_sendoob() are contained here and called by tp_usrreq(). 47 */ 48 49 #include "param.h" 50 #include "systm.h" 51 #include "mbuf.h" 52 #include "socket.h" 53 #include "socketvar.h" 54 #include "domain.h" 55 #include "protosw.h" 56 #include "errno.h" 57 #include "time.h" 58 59 #include "tp_param.h" 60 #include "tp_timer.h" 61 #include "tp_stat.h" 62 #include "tp_seq.h" 63 #include "tp_ip.h" 64 #include "tp_pcb.h" 65 #include "argo_debug.h" 66 #include "tp_trace.h" 67 #include "tp_meas.h" 68 #include "iso.h" 69 #include "iso_errno.h" 70 71 int tp_attach(), tp_driver(), tp_pcbbind(); 72 int TNew; 73 int TPNagle1, TPNagle2; 74 struct tp_pcb *tp_listeners, *tp_intercepts; 75 76 #ifdef ARGO_DEBUG 77 /* 78 * CALLED FROM: 79 * anywhere you want to debug... 80 * FUNCTION and ARGUMENTS: 81 * print (str) followed by the control info in the mbufs of an mbuf chain (n) 82 */ 83 void 84 dump_mbuf(n, str) 85 struct mbuf *n; 86 char *str; 87 { 88 struct mbuf *nextrecord; 89 90 printf("dump %s\n", str); 91 92 if (n == MNULL) { 93 printf("EMPTY:\n"); 94 return; 95 } 96 97 while (n) { 98 nextrecord = n->m_act; 99 printf("RECORD:\n"); 100 while (n) { 101 printf("%x : Len %x Data %x A %x Nx %x Tp %x\n", 102 n, n->m_len, n->m_data, n->m_act, n->m_next, n->m_type); 103 #ifdef notdef 104 { 105 register char *p = mtod(n, char *); 106 register int i; 107 108 printf("data: "); 109 for (i = 0; i < n->m_len; i++) { 110 if (i%8 == 0) 111 printf("\n"); 112 printf("0x%x ", *(p+i)); 113 } 114 printf("\n"); 115 } 116 #endif notdef 117 if (n->m_next == n) { 118 printf("LOOP!\n"); 119 return; 120 } 121 n = n->m_next; 122 } 123 n = nextrecord; 124 } 125 printf("\n"); 126 } 127 128 #endif ARGO_DEBUG 129 130 /* 131 * CALLED FROM: 132 * tp_usrreq(), PRU_RCVOOB 133 * FUNCTION and ARGUMENTS: 134 * Copy data from the expedited data socket buffer into 135 * the pre-allocated mbuf m. 136 * There is an isomorphism between XPD TPDUs and expedited data TSDUs. 137 * XPD tpdus are limited to 16 bytes of data so they fit in one mbuf. 138 * RETURN VALUE: 139 * EINVAL if debugging is on and a disaster has occurred 140 * ENOTCONN if the socket isn't connected 141 * EWOULDBLOCK if the socket is in non-blocking mode and there's no 142 * xpd data in the buffer 143 * E* whatever is returned from the fsm. 144 */ 145 tp_rcvoob(tpcb, so, m, outflags, inflags) 146 struct tp_pcb *tpcb; 147 register struct socket *so; 148 register struct mbuf *m; 149 int *outflags; 150 int inflags; 151 { 152 register struct mbuf *n; 153 register struct sockbuf *sb = &so->so_rcv; 154 struct tp_event E; 155 int error = 0; 156 register struct mbuf **nn; 157 158 IFDEBUG(D_XPD) 159 printf("PRU_RCVOOB, sostate 0x%x\n", so->so_state); 160 ENDDEBUG 161 162 /* if you use soreceive */ 163 if (m == MNULL) 164 return ENOBUFS; 165 166 restart: 167 if ((((so->so_state & SS_ISCONNECTED) == 0) 168 || (so->so_state & SS_ISDISCONNECTING) != 0) && 169 (so->so_proto->pr_flags & PR_CONNREQUIRED)) { 170 return ENOTCONN; 171 } 172 173 /* Take the first mbuf off the chain. 174 * Each XPD TPDU gives you a complete TSDU so the chains don't get 175 * coalesced, but one TSDU may span several mbufs. 176 * Nevertheless, since n should have a most 16 bytes, it 177 * will fit into m. (size was checked in tp_input() ) 178 */ 179 180 /* 181 * Code for excision of OOB data should be added to 182 * uipc_socket2.c (like sbappend). 183 */ 184 185 sblock(sb); 186 for (nn = &sb->sb_mb; n = *nn; nn = &n->m_act) 187 if (n->m_type == MT_OOBDATA) 188 break; 189 190 if (n == 0) { 191 IFDEBUG(D_XPD) 192 printf("RCVOOB: empty queue!\n"); 193 ENDDEBUG 194 sbunlock(sb); 195 if (so->so_state & SS_NBIO) { 196 return EWOULDBLOCK; 197 } 198 sbwait(sb); 199 goto restart; 200 } 201 m->m_len = 0; 202 203 /* Assuming at most one xpd tpdu is in the buffer at once */ 204 while (n != MNULL) { 205 m->m_len += n->m_len; 206 bcopy(mtod(n, caddr_t), mtod(m, caddr_t), (unsigned)n->m_len); 207 m->m_data += n->m_len; /* so mtod() in bcopy() above gives right addr */ 208 n = n->m_next; 209 } 210 m->m_data = m->m_dat; 211 m->m_flags |= M_EOR; 212 213 IFDEBUG(D_XPD) 214 printf("tp_rcvoob: xpdlen 0x%x\n", m->m_len); 215 dump_mbuf(so->so_rcv.sb_mb, "RCVOOB: Rcv socketbuf"); 216 dump_mbuf(sb->sb_mb, "RCVOOB: Xrcv socketbuf"); 217 ENDDEBUG 218 219 if ((inflags & MSG_PEEK) == 0) { 220 n = *nn; 221 *nn = n->m_act; 222 sb->sb_cc -= m->m_len; 223 } 224 225 release: 226 sbunlock(sb); 227 228 IFTRACE(D_XPD) 229 tptraceTPCB(TPPTmisc, "PRU_RCVOOB @ release sb_cc m_len", 230 tpcb->tp_Xrcv.sb_cc, m->m_len, 0, 0); 231 ENDTRACE 232 if (error == 0) 233 error = DoEvent(T_USR_Xrcvd); 234 return error; 235 } 236 237 /* 238 * CALLED FROM: 239 * tp_usrreq(), PRU_SENDOOB 240 * FUNCTION and ARGUMENTS: 241 * Send what's in the mbuf chain (m) as an XPD TPDU. 242 * The mbuf may not contain more then 16 bytes of data. 243 * XPD TSDUs aren't segmented, so they translate into 244 * exactly one XPD TPDU, with EOT bit set. 245 * RETURN VALUE: 246 * EWOULDBLOCK if socket is in non-blocking mode and the previous 247 * xpd data haven't been acked yet. 248 * EMSGSIZE if trying to send > max-xpd bytes (16) 249 * ENOBUFS if ran out of mbufs 250 */ 251 tp_sendoob(tpcb, so, xdata, outflags) 252 struct tp_pcb *tpcb; 253 register struct socket *so; 254 register struct mbuf *xdata; 255 int *outflags; /* not used */ 256 { 257 /* 258 * Each mbuf chain represents a sequence # in the XPD seq space. 259 * The first one in the queue has sequence # tp_Xuna. 260 * When we add to the XPD queue, we stuff a zero-length 261 * mbuf (mark) into the DATA queue, with its sequence number in m_next 262 * to be assigned to this XPD tpdu, so data xfer can stop 263 * when it reaches the zero-length mbuf if this XPD TPDU hasn't 264 * yet been acknowledged. 265 */ 266 register struct sockbuf *sb = &(tpcb->tp_Xsnd); 267 register struct mbuf *xmark; 268 register int len=0; 269 struct tp_event E; 270 271 IFDEBUG(D_XPD) 272 printf("tp_sendoob:"); 273 if (xdata) 274 printf("xdata len 0x%x\n", xdata->m_len); 275 ENDDEBUG 276 /* DO NOT LOCK the Xsnd buffer!!!! You can have at MOST one 277 * socket buf locked at any time!!! (otherwise you might 278 * sleep() in sblock() w/ a signal pending and cause the 279 * system call to be aborted w/ a locked socketbuf, which 280 * is a problem. So the so_snd buffer lock 281 * (done in sosend()) serves as the lock for Xpd. 282 */ 283 if (sb->sb_mb) { /* Anything already in eXpedited data sockbuf? */ 284 if (so->so_state & SS_NBIO) { 285 return EWOULDBLOCK; 286 } 287 while (sb->sb_mb) { 288 sbunlock(&so->so_snd); /* already locked by sosend */ 289 sbwait(&so->so_snd); 290 sblock(&so->so_snd); /* sosend will unlock on return */ 291 } 292 } 293 294 if (xdata == (struct mbuf *)0) { 295 /* empty xpd packet */ 296 MGETHDR(xdata, M_WAIT, MT_OOBDATA); 297 if (xdata == NULL) { 298 return ENOBUFS; 299 } 300 xdata->m_len = 0; 301 xdata->m_pkthdr.len = 0; 302 } 303 IFDEBUG(D_XPD) 304 printf("tp_sendoob 1:"); 305 if (xdata) 306 printf("xdata len 0x%x\n", xdata->m_len); 307 ENDDEBUG 308 xmark = xdata; /* temporary use of variable xmark */ 309 while (xmark) { 310 len += xmark->m_len; 311 xmark = xmark->m_next; 312 } 313 if (len > TP_MAX_XPD_DATA) { 314 return EMSGSIZE; 315 } 316 IFDEBUG(D_XPD) 317 printf("tp_sendoob 2:"); 318 if (xdata) 319 printf("xdata len 0x%x\n", len); 320 ENDDEBUG 321 322 323 IFTRACE(D_XPD) 324 tptraceTPCB(TPPTmisc, "XPD mark m_next ", xdata->m_next, 0, 0, 0); 325 ENDTRACE 326 327 sbappendrecord(sb, xdata); 328 329 IFDEBUG(D_XPD) 330 printf("tp_sendoob len 0x%x\n", len); 331 dump_mbuf(so->so_snd.sb_mb, "XPD request Regular sndbuf:"); 332 dump_mbuf(tpcb->tp_Xsnd.sb_mb, "XPD request Xsndbuf:"); 333 ENDDEBUG 334 return DoEvent(T_XPD_req); 335 } 336 337 /* 338 * CALLED FROM: 339 * the socket routines 340 * FUNCTION and ARGUMENTS: 341 * Handles all "user requests" except the [gs]ockopts() requests. 342 * The argument (req) is the request type (PRU*), 343 * (m) is an mbuf chain, generally used for send and 344 * receive type requests only. 345 * (nam) is used for addresses usually, in particular for the bind request. 346 * 347 */ 348 /*ARGSUSED*/ 349 ProtoHook 350 tp_usrreq(so, req, m, nam, controlp) 351 struct socket *so; 352 u_int req; 353 struct mbuf *m, *nam, *controlp; 354 { 355 register struct tp_pcb *tpcb = sototpcb(so); 356 int s = splnet(); 357 int error = 0; 358 int flags, *outflags = &flags; 359 u_long eotsdu = 0; 360 struct tp_event E; 361 362 IFDEBUG(D_REQUEST) 363 printf("usrreq(0x%x,%d,0x%x,0x%x,0x%x)\n",so,req,m,nam,outflags); 364 if (so->so_error) 365 printf("WARNING!!! so->so_error is 0x%x\n", so->so_error); 366 ENDDEBUG 367 IFTRACE(D_REQUEST) 368 tptraceTPCB(TPPTusrreq, "req so m state [", req, so, m, 369 tpcb?tpcb->tp_state:0); 370 ENDTRACE 371 372 if ((u_int)tpcb == 0 && req != PRU_ATTACH) { 373 IFTRACE(D_REQUEST) 374 tptraceTPCB(TPPTusrreq, "req failed NO TPCB[", 0, 0, 0, 0); 375 ENDTRACE 376 splx(s); 377 return ENOTCONN; 378 } 379 380 switch (req) { 381 382 case PRU_ATTACH: 383 if (tpcb) { 384 error = EISCONN; 385 } else if ((error = tp_attach(so, (int)nam)) == 0) 386 tpcb = sototpcb(so); 387 break; 388 389 case PRU_ABORT: /* called from close() */ 390 /* called for each incoming connect queued on the 391 * parent (accepting) socket 392 */ 393 if (tpcb->tp_state == TP_OPEN || tpcb->tp_state == TP_CONFIRMING) { 394 E.ATTR(T_DISC_req).e_reason = E_TP_NO_SESSION; 395 error = DoEvent(T_DISC_req); /* pretend it was a close() */ 396 break; 397 } /* else DROP THROUGH */ 398 399 case PRU_DETACH: /* called from close() */ 400 /* called only after disconnect was called */ 401 if (tpcb->tp_state == TP_LISTENING) { 402 register struct tp_pcb **tt; 403 for (tt = &tp_listeners; *tt; tt = &((*tt)->tp_nextlisten)) 404 if (*tt == tpcb) 405 break; 406 if (*tt) 407 *tt = tpcb->tp_nextlisten; 408 else 409 printf("tp_usrreq - detach: should panic\n"); 410 } 411 if (tpcb->tp_next) { 412 remque(tpcb); 413 tpcb->tp_next = tpcb->tp_prev = 0; 414 } 415 error = DoEvent(T_DETACH); 416 if (tpcb->tp_state == TP_CLOSED) { 417 free((caddr_t)tpcb, M_PCB); 418 tpcb = 0; 419 } 420 break; 421 422 case PRU_SHUTDOWN: 423 /* recv end may have been released; local credit might be zero */ 424 case PRU_DISCONNECT: 425 E.ATTR(T_DISC_req).e_reason = E_TP_NORMAL_DISC; 426 error = DoEvent(T_DISC_req); 427 break; 428 429 case PRU_BIND: 430 error = tp_pcbbind(tpcb, nam); 431 break; 432 433 case PRU_LISTEN: 434 if (tpcb->tp_state != TP_CLOSED || tpcb->tp_lsuffixlen == 0 || 435 tpcb->tp_next == 0) 436 error = EINVAL; 437 else { 438 register struct tp_pcb **tt; 439 remque(tpcb); 440 tpcb->tp_next = tpcb->tp_prev = tpcb; 441 for (tt = &tp_listeners; *tt; tt = &((*tt)->tp_nextlisten)) 442 if ((*tt)->tp_lsuffixlen) 443 break; 444 tpcb->tp_nextlisten = *tt; 445 *tt = tpcb; 446 error = DoEvent(T_LISTEN_req); 447 } 448 break; 449 450 case PRU_CONNECT2: 451 error = EOPNOTSUPP; /* for unix domain sockets */ 452 break; 453 454 case PRU_CONNECT: 455 IFTRACE(D_CONN) 456 tptraceTPCB(TPPTmisc, 457 "PRU_CONNECT: so 0x%x *SHORT_LSUFXP(tpcb) 0x%x lsuflen 0x%x, class 0x%x", 458 tpcb->tp_sock, *SHORT_LSUFXP(tpcb), tpcb->tp_lsuffixlen, 459 tpcb->tp_class); 460 ENDTRACE 461 IFDEBUG(D_CONN) 462 printf("PRU_CONNECT: so *SHORT_LSUFXP(tpcb) 0x%x lsuflen 0x%x, class 0x%x", 463 tpcb->tp_sock, *SHORT_LSUFXP(tpcb), tpcb->tp_lsuffixlen, 464 tpcb->tp_class); 465 ENDDEBUG 466 if (tpcb->tp_lsuffixlen == 0) { 467 if (error = tp_pcbbind(tpcb, MNULL)) { 468 IFDEBUG(D_CONN) 469 printf("pcbbind returns error 0x%x\n", error); 470 ENDDEBUG 471 break; 472 } 473 } 474 IFDEBUG(D_CONN) 475 printf("isop 0x%x isop->isop_socket offset 12 :\n", tpcb->tp_npcb); 476 dump_buf(tpcb->tp_npcb, 16); 477 ENDDEBUG 478 if (error = tp_route_to(nam, tpcb, /* channel */0)) 479 break; 480 IFDEBUG(D_CONN) 481 printf( 482 "PRU_CONNECT after tpcb 0x%x so 0x%x npcb 0x%x flags 0x%x\n", 483 tpcb, so, tpcb->tp_npcb, tpcb->tp_flags); 484 printf("isop 0x%x isop->isop_socket offset 12 :\n", tpcb->tp_npcb); 485 dump_buf(tpcb->tp_npcb, 16); 486 ENDDEBUG 487 if (tpcb->tp_fsuffixlen == 0) { 488 /* didn't set peer extended suffix */ 489 (tpcb->tp_nlproto->nlp_getsufx)(tpcb->tp_npcb, &tpcb->tp_fsuffixlen, 490 tpcb->tp_fsuffix, TP_FOREIGN); 491 } 492 (void) (tpcb->tp_nlproto->nlp_mtu)(so, tpcb->tp_npcb, 493 &tpcb->tp_l_tpdusize, &tpcb->tp_tpdusize, 0); 494 if (tpcb->tp_state == TP_CLOSED) { 495 soisconnecting(so); 496 error = DoEvent(T_CONN_req); 497 } else { 498 (tpcb->tp_nlproto->nlp_pcbdisc)(tpcb->tp_npcb); 499 error = EISCONN; 500 } 501 IFPERF(tpcb) 502 u_int lsufx, fsufx; 503 lsufx = *(u_short *)(tpcb->tp_lsuffix); 504 fsufx = *(u_short *)(tpcb->tp_fsuffix); 505 506 tpmeas(tpcb->tp_lref, 507 TPtime_open | (tpcb->tp_xtd_format << 4), 508 &time, lsufx, fsufx, tpcb->tp_fref); 509 ENDPERF 510 break; 511 512 case PRU_ACCEPT: 513 (tpcb->tp_nlproto->nlp_getnetaddr)(tpcb->tp_npcb, nam, TP_FOREIGN); 514 IFDEBUG(D_REQUEST) 515 printf("ACCEPT PEERADDDR:"); 516 dump_buf(mtod(nam, char *), nam->m_len); 517 ENDDEBUG 518 IFPERF(tpcb) 519 u_int lsufx, fsufx; 520 lsufx = *(u_short *)(tpcb->tp_lsuffix); 521 fsufx = *(u_short *)(tpcb->tp_fsuffix); 522 523 tpmeas(tpcb->tp_lref, TPtime_open, 524 &time, lsufx, fsufx, tpcb->tp_fref); 525 ENDPERF 526 break; 527 528 case PRU_RCVD: 529 if (so->so_state & SS_ISCONFIRMING) { 530 if (tpcb->tp_state == TP_CONFIRMING) 531 error = tp_confirm(tpcb); 532 break; 533 } 534 IFTRACE(D_DATA) 535 tptraceTPCB(TPPTmisc, 536 "RCVD BF: lcredit sent_lcdt cc hiwat \n", 537 tpcb->tp_lcredit, tpcb->tp_sent_lcdt, 538 so->so_rcv.sb_cc, so->so_rcv.sb_hiwat); 539 LOCAL_CREDIT(tpcb); 540 tptraceTPCB(TPPTmisc, 541 "PRU_RCVD AF sbspace lcredit hiwat cc", 542 sbspace(&so->so_rcv), tpcb->tp_lcredit, 543 so->so_rcv.sb_cc, so->so_rcv.sb_hiwat); 544 ENDTRACE 545 IFDEBUG(D_REQUEST) 546 printf("RCVD: cc %d space %d hiwat %d\n", 547 so->so_rcv.sb_cc, sbspace(&so->so_rcv), 548 so->so_rcv.sb_hiwat); 549 ENDDEBUG 550 if (((int)nam) & MSG_OOB) 551 error = DoEvent(T_USR_Xrcvd); 552 else 553 error = DoEvent(T_USR_rcvd); 554 break; 555 556 case PRU_RCVOOB: 557 if ((so->so_state & SS_ISCONNECTED) == 0) { 558 error = ENOTCONN; 559 break; 560 } 561 if (! tpcb->tp_xpd_service) { 562 error = EOPNOTSUPP; 563 break; 564 } 565 /* kludge - nam is really flags here */ 566 error = tp_rcvoob(tpcb, so, m, outflags, (int)nam); 567 break; 568 569 case PRU_SEND: 570 case PRU_SENDOOB: 571 if (controlp) { 572 error = tp_snd_control(controlp, so, &m); 573 controlp = NULL; 574 if (error) 575 break; 576 } 577 if ((so->so_state & SS_ISCONFIRMING) && 578 (tpcb->tp_state == TP_CONFIRMING) && 579 (error = tp_confirm(tpcb))) 580 break; 581 if (req == PRU_SENDOOB) { 582 error = (tpcb->tp_xpd_service == 0) ? 583 EOPNOTSUPP : tp_sendoob(tpcb, so, m, outflags); 584 break; 585 } 586 if (m == 0) 587 break; 588 if (m->m_flags & M_EOR) { 589 eotsdu = 1; 590 m->m_flags &= ~M_EOR; 591 } 592 if (eotsdu == 0 && m->m_pkthdr.len == 0) 593 break; 594 if (tpcb->tp_state != TP_AKWAIT && tpcb->tp_state != TP_OPEN) { 595 error = ENOTCONN; 596 break; 597 } 598 /* 599 * The protocol machine copies mbuf chains, 600 * prepends headers, assigns seq numbers, and 601 * puts the packets on the device. 602 * When they are acked they are removed from the socket buf. 603 * 604 * sosend calls this up until sbspace goes negative. 605 * Sbspace may be made negative by appending this mbuf chain, 606 * possibly by a whole cluster. 607 */ 608 { 609 register struct mbuf *n = m; 610 register struct sockbuf *sb = &so->so_snd; 611 int maxsize = tpcb->tp_l_tpdusize 612 - tp_headersize(DT_TPDU_type, tpcb) 613 - (tpcb->tp_use_checksum?4:0) ; 614 int totlen = n->m_pkthdr.len; 615 int mbufcnt = 0; 616 struct mbuf *nn; 617 618 /* 619 * Could have eotsdu and no data.(presently MUST have 620 * an mbuf though, even if its length == 0) 621 */ 622 IFPERF(tpcb) 623 PStat(tpcb, Nb_from_sess) += totlen; 624 tpmeas(tpcb->tp_lref, TPtime_from_session, 0, 0, 625 PStat(tpcb, Nb_from_sess), totlen); 626 ENDPERF 627 IFDEBUG(D_SYSCALL) 628 printf( 629 "PRU_SEND: eot %d before sbappend 0x%x len 0x%x to sb @ 0x%x\n", 630 eotsdu, m, totlen, sb); 631 dump_mbuf(sb->sb_mb, "so_snd.sb_mb"); 632 dump_mbuf(m, "m : to be added"); 633 ENDDEBUG 634 /* 635 * Pre-packetize the data in the sockbuf 636 * according to negotiated mtu. Do it here 637 * where we can safely wait for mbufs. 638 * 639 * This presumes knowledge of sockbuf conventions. 640 */ 641 if (n = sb->sb_mb) 642 while (n->m_act) 643 n = n->m_act; 644 if ((nn = n) && n->m_pkthdr.len < maxsize) { 645 u_int space = maxsize - n->m_pkthdr.len; 646 647 do { 648 if (n->m_flags & M_EOR) 649 goto on1; 650 } while (n->m_next && (n = n->m_next)); 651 if (totlen <= space) { 652 TPNagle1++; 653 n->m_next = m; 654 nn->m_pkthdr.len += totlen; 655 while (n = n->m_next) 656 sballoc(sb, n); 657 if (eotsdu) 658 nn->m_flags |= M_EOR; 659 goto on2; 660 } else { 661 /* 662 * Can't sleep here, because when you wake up 663 * packet you want to attach to may be gone! 664 */ 665 if (TNew && (n->m_next = m_copym(m, 0, space, M_NOWAIT))) { 666 nn->m_pkthdr.len += space; 667 TPNagle2++; 668 while (n = n->m_next) 669 sballoc(sb, n); 670 m_adj(m, space); 671 } 672 } 673 } 674 on1: mbufcnt++; 675 for (n = m; n->m_pkthdr.len > maxsize;) { 676 nn = m_copym(n, 0, maxsize, M_WAIT); 677 sbappendrecord(sb, nn); 678 m_adj(n, maxsize); 679 mbufcnt++; 680 } 681 if (eotsdu) 682 n->m_flags |= M_EOR; 683 sbappendrecord(sb, n); 684 on2: 685 IFTRACE(D_DATA) 686 tptraceTPCB(TPPTmisc, 687 "SEND BF: maxsize totlen mbufcnt eotsdu", 688 maxsize, totlen, mbufcnt, eotsdu); 689 ENDTRACE 690 IFDEBUG(D_SYSCALL) 691 printf("PRU_SEND: eot %d after sbappend 0x%x mbufcnt 0x%x\n", 692 eotsdu, n, mbufcnt); 693 dump_mbuf(sb->sb_mb, "so_snd.sb_mb"); 694 ENDDEBUG 695 if (tpcb->tp_state == TP_OPEN) 696 error = DoEvent(T_DATA_req); 697 IFDEBUG(D_SYSCALL) 698 printf("PRU_SEND: after driver error 0x%x \n",error); 699 printf("so_snd 0x%x cc 0t%d mbcnt 0t%d\n", 700 sb, sb->sb_cc, sb->sb_mbcnt); 701 dump_mbuf(sb->sb_mb, "so_snd.sb_mb after driver"); 702 ENDDEBUG 703 } 704 break; 705 706 case PRU_SOCKADDR: 707 (tpcb->tp_nlproto->nlp_getnetaddr)(tpcb->tp_npcb, nam, TP_LOCAL); 708 break; 709 710 case PRU_PEERADDR: 711 (tpcb->tp_nlproto->nlp_getnetaddr)(tpcb->tp_npcb, nam, TP_FOREIGN); 712 break; 713 714 case PRU_CONTROL: 715 error = EOPNOTSUPP; 716 break; 717 718 case PRU_PROTOSEND: 719 case PRU_PROTORCV: 720 case PRU_SENSE: 721 case PRU_SLOWTIMO: 722 case PRU_FASTTIMO: 723 error = EOPNOTSUPP; 724 break; 725 726 default: 727 #ifdef ARGO_DEBUG 728 printf("tp_usrreq UNKNOWN PRU %d\n", req); 729 #endif ARGO_DEBUG 730 error = EOPNOTSUPP; 731 } 732 733 IFDEBUG(D_REQUEST) 734 printf("%s, so 0x%x, tpcb 0x%x, error %d, state %d\n", 735 "returning from tp_usrreq", so, tpcb, error, 736 tpcb ? 0 : tpcb->tp_state); 737 ENDDEBUG 738 IFTRACE(D_REQUEST) 739 tptraceTPCB(TPPTusrreq, "END req so m state [", req, so, m, 740 tpcb?0:tpcb->tp_state); 741 ENDTRACE 742 if (controlp) { 743 m_freem(controlp); 744 printf("control data unexpectedly retained in tp_usrreq()"); 745 } 746 splx(s); 747 return error; 748 } 749 tp_ltrace(so, uio) 750 struct socket *so; 751 struct uio *uio; 752 { 753 IFTRACE(D_DATA) 754 register struct tp_pcb *tpcb = sototpcb(so); 755 if (tpcb) { 756 tptraceTPCB(TPPTmisc, "sosend so resid iovcnt", so, 757 uio->uio_resid, uio->uio_iovcnt, 0); 758 } 759 ENDTRACE 760 } 761 762 tp_confirm(tpcb) 763 register struct tp_pcb *tpcb; 764 { 765 struct tp_event E; 766 if (tpcb->tp_state == TP_CONFIRMING) 767 return DoEvent(T_ACPT_req); 768 printf("Tp confirm called when not confirming; tpcb 0x%x, state 0x%x\n", 769 tpcb, tpcb->tp_state); 770 return 0; 771 } 772 773 /* 774 * Process control data sent with sendmsg() 775 */ 776 tp_snd_control(m, so, data) 777 struct mbuf *m; 778 struct socket *so; 779 register struct mbuf **data; 780 { 781 register struct cmsghdr *ch; 782 int error = 0; 783 784 if (m && m->m_len) { 785 ch = mtod(m, struct cmsghdr *); 786 m->m_len -= sizeof (*ch); 787 m->m_data += sizeof (*ch); 788 error = tp_ctloutput(PRCO_SETOPT, 789 so, ch->cmsg_level, ch->cmsg_type, &m); 790 if (ch->cmsg_type == TPOPT_DISC_DATA) { 791 if (data && *data) { 792 m_freem(*data); 793 *data = 0; 794 } 795 error = tp_usrreq(so, PRU_DISCONNECT, (struct mbuf *)0, 796 (caddr_t)0, (struct mbuf *)0); 797 } 798 } 799 if (m) 800 m_freem(m); 801 return error; 802 } 803