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sys/netccitt/llc_var.h
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1 /* $NetBSD: llc_var.h,v 1.13 2003/08/07 16:33:03 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Dirk Husemann and the Computer Science Department (IV) of 9 * the University of Erlangen-Nuremberg, Germany. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)llc_var.h 8.2 (Berkeley) 2/9/95 36 */ 37 38 /* 39 * Copyright (c) 1990, 1991, 1992 40 * Dirk Husemann, Computer Science Department IV, 41 * University of Erlangen-Nuremberg, Germany. 42 * 43 * This code is derived from software contributed to Berkeley by 44 * Dirk Husemann and the Computer Science Department (IV) of 45 * the University of Erlangen-Nuremberg, Germany. 46 * 47 * Redistribution and use in source and binary forms, with or without 48 * modification, are permitted provided that the following conditions 49 * are met: 50 * 1. Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * 2. Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in the 54 * documentation and/or other materials provided with the distribution. 55 * 3. All advertising materials mentioning features or use of this software 56 * must display the following acknowledgement: 57 * This product includes software developed by the University of 58 * California, Berkeley and its contributors. 59 * 4. Neither the name of the University nor the names of its contributors 60 * may be used to endorse or promote products derived from this software 61 * without specific prior written permission. 62 * 63 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 64 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 65 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 66 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 67 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 68 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 69 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 70 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 71 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 72 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 73 * SUCH DAMAGE. 74 * 75 * @(#)llc_var.h 8.2 (Berkeley) 2/9/95 76 */ 77 78 struct llc; 79 80 #define NPAIDB_LINK 0 81 82 struct npaidbentry { 83 union { 84 /* MAC,DLSAP -> CONS */ 85 struct { 86 struct llc_linkcb *NE_link; 87 struct rtentry *NE_rt; 88 } NE; 89 /* SAP info for unconfigured incoming calls */ 90 struct { 91 u_short SI_class; 92 #define LLC_CLASS_I 0x1 93 #define LLC_CLASS_II 0x3 94 #define LLC_CLASS_III 0x4 /* Future */ 95 #define LLC_CLASS_IV 0x7 /* Future */ 96 u_short SI_window; 97 u_short SI_trace; 98 u_short SI_xchxid; 99 void (*SI_input) 100 __P((struct mbuf *,...)); 101 void *(*SI_ctlinput) 102 __P((int,struct sockaddr *,void *)); 103 } SI; 104 } NESIun; 105 }; 106 #define np_link NESIun.NE.NE_link 107 #define np_rt NESIun.NE.NE_rt 108 #define si_class NESIun.SI.SI_class 109 #define si_window NESIun.SI.SI_window 110 #define si_trace NESIun.SI.SI_trace 111 #define si_xchxid NESIun.SI.SI_xchxid 112 #define si_input NESIun.SI.SI_input 113 #define si_ctlinput NESIun.SI.SI_ctlinput 114 115 #define NPDL_SAPNETMASK 0x7e 116 117 /* 118 * Definitions for accessing bitfields/bitslices inside 119 * LLC2 headers 120 */ 121 struct bitslice { 122 unsigned int bs_mask; 123 unsigned int bs_shift; 124 }; 125 126 127 #define i_z 0 128 #define i_ns 1 129 #define i_pf 0 130 #define i_nr 1 131 #define s_oz 2 132 #define s_selector 3 133 #define s_pf 0 134 #define s_nr 1 135 #define u_bb 2 136 #define u_select_other 3 137 #define u_pf 4 138 #define u_select 5 139 #define f_vs 1 140 #define f_cr 0 141 #define f_vr 1 142 #define f_wxyzv 6 143 144 #define LLCGBITS(Arg,Index) \ 145 (((Arg) & llc_bitslice[(Index)].bs_mask) >> \ 146 llc_bitslice[(Index)].bs_shift) 147 #define LLCSBITS(Arg,Index,Val) \ 148 (Arg) |= (((Val) << llc_bitslice[(Index)].bs_shift) & \ 149 llc_bitslice[(Index)].bs_mask) 150 #define LLCCSBITS(Arg,Index,Val) \ 151 (Arg) = (((Val) << llc_bitslice[(Index)].bs_shift) & \ 152 llc_bitslice[(Index)].bs_mask) 153 154 extern struct bitslice llc_bitslice[]; 155 156 #define LLC_CMD 0 157 #define LLC_RSP 1 158 #define LLC_MAXCMDRSP 2 159 160 /* 161 * LLC events --- These events may either be frames received from the 162 * remote LLC DSAP,request from the network layer user, 163 * timer events from llc_timer(),or diagnostic events from 164 * llc_input(). 165 */ 166 167 /* LLC frame types */ 168 #define LLCFT_INFO 0 * LLC_MAXCMDRSP 169 #define LLCFT_RR 1 * LLC_MAXCMDRSP 170 #define LLCFT_RNR 2 * LLC_MAXCMDRSP 171 #define LLCFT_REJ 3 * LLC_MAXCMDRSP 172 #define LLCFT_DM 4 * LLC_MAXCMDRSP 173 #define LLCFT_SABME 5 * LLC_MAXCMDRSP 174 #define LLCFT_DISC 6 * LLC_MAXCMDRSP 175 #define LLCFT_UA 7 * LLC_MAXCMDRSP 176 #define LLCFT_FRMR 8 * LLC_MAXCMDRSP 177 #define LLCFT_UI 9 * LLC_MAXCMDRSP 178 #define LLCFT_XID 10 * LLC_MAXCMDRSP 179 #define LLCFT_TEST 11 * LLC_MAXCMDRSP 180 181 /* LLC2 timer events */ 182 #define LLC_ACK_TIMER_EXPIRED 12 * LLC_MAXCMDRSP 183 #define LLC_P_TIMER_EXPIRED 13 * LLC_MAXCMDRSP 184 #define LLC_REJ_TIMER_EXPIRED 14 * LLC_MAXCMDRSP 185 #define LLC_BUSY_TIMER_EXPIRED 15 * LLC_MAXCMDRSP 186 187 /* LLC2 diagnostic events */ 188 #define LLC_INVALID_NR 16 * LLC_MAXCMDRSP 189 #define LLC_INVALID_NS 17 * LLC_MAXCMDRSP 190 #define LLC_BAD_PDU 18 * LLC_MAXCMDRSP 191 #define LLC_LOCAL_BUSY_DETECTED 19 * LLC_MAXCMDRSP 192 #define LLC_LOCAL_BUSY_CLEARED 20 * LLC_MAXCMDRSP 193 194 /* Network layer user requests */ 195 /* 196 * NL_CONNECT_REQUEST --- The user has requested that a data link connection 197 * be established with a remote LLC DSAP. 198 */ 199 #define NL_CONNECT_REQUEST 21 * LLC_MAXCMDRSP 200 /* 201 * NL_CONNECT_RESPONSE --- The user has accepted the data link connection. 202 */ 203 #define NL_CONNECT_RESPONSE 22 * LLC_MAXCMDRSP 204 /* 205 * NL_RESET_REQUEST --- The user has requested that the data link with the 206 * remote LLC DSAP be reset. 207 */ 208 #define NL_RESET_REQUEST 23 * LLC_MAXCMDRSP 209 /* 210 * NL_RESET_RESPONSE --- The user has accepted the reset of the data link 211 * connection. 212 */ 213 #define NL_RESET_RESPONSE 24 * LLC_MAXCMDRSP 214 /* 215 * NL_DISCONNECT_REQUEST --- The user has requested that the data link 216 * connection with remote LLC DSAP be terminated. 217 */ 218 #define NL_DISCONNECT_REQUEST 25 * LLC_MAXCMDRSP 219 /* 220 * NL_DATA_REQUEST --- The user has requested that a data unit be sent ot the 221 * remote LLC DSAP. 222 */ 223 #define NL_DATA_REQUEST 26 * LLC_MAXCMDRSP 224 /* 225 * NL_INITIATE_PF_CYCLE --- The local LLC wants to initiate a P/F cycle. 226 */ 227 #define NL_INITIATE_PF_CYCLE 27 * LLC_MAXCMDRSP 228 /* 229 * NL_LOCAL_BUSY_DETECTED --- The local entity has encountered a busy condition 230 */ 231 #define NL_LOCAL_BUSY_DETECTED 28 * LLC_MAXCMDRSP 232 233 #define LLCFT_NONE 255 234 235 /* return message from state handlers */ 236 237 /* 238 * LLC_CONNECT_INDICATION --- Inform the user that a connection has been 239 * requested by a remote LLC SSAP. 240 */ 241 #define LLC_CONNECT_INDICATION 1 242 /* 243 * LLC_CONNECT_CONFIRM --- The connection service component indicates that the 244 * remote network entity has accepted the connection. 245 */ 246 #define LLC_CONNECT_CONFIRM 2 247 /* 248 * LLC_DISCONNECT_INDICATION --- Inform the user that the remote network 249 * entity has intiated disconnection of the data 250 * link connection. 251 */ 252 #define LLC_DISCONNECT_INDICATION 3 253 /* 254 * LLC_RESET_CONFIRM --- The connection service component indicates that the 255 * remote network entity has accepted the reset. 256 */ 257 #define LLC_RESET_CONFIRM 4 258 /* 259 * LLC_RESET_INDICATION_REMOTE --- The remote network entity or remote peer 260 * has initiated a reset of the data link 261 * connection. 262 */ 263 #define LLC_RESET_INDICATION_REMOTE 5 264 /* 265 * LLC_RESET_INDICATION_LOCAL --- The local LLC has determined that the data 266 * link connection is in need of 267 * reinitialization. 268 */ 269 #define LLC_RESET_INDICATION_LOCAL 6 270 /* 271 * LLC_FRMR_RECEIVED --- The local connection service component has received a 272 * FRMR response PDU. 273 */ 274 #define LLC_FRMR_RECEIVED 7 275 /* 276 * LLC_FRMR_SENT --- The local connection component has received an ivalid 277 * PDU,and has sent a FRMR response PDU. 278 */ 279 #define LLC_FRMR_SENT 8 280 /* 281 * LLC_DATA_INDICATION --- The connection service component passes the data 282 * unit from the received I PDU to the user. 283 */ 284 #define LLC_DATA_INDICATION 9 285 /* 286 * LLC_REMOTE_NOT_BUSY --- The remote LLC DSAP is no longer busy. The local 287 * connection service component will now accept a 288 * DATA_REQUEST. 289 */ 290 #define LLC_REMOTE_NOT_BUSY 10 291 /* 292 * LLC_REMOTE_BUSY --- The remote LLC DSAP is busy. The local connection 293 * service component will not accept a DATA_REQUEST. 294 */ 295 #define LLC_REMOTE_BUSY 11 296 297 /* Internal return code */ 298 #define LLC_PASSITON 255 299 300 #define INFORMATION_CONTROL 0x00 301 #define SUPERVISORY_CONTROL 0x02 302 #define UNUMBERED_CONTROL 0x03 303 304 /* 305 * Other necessary definitions 306 */ 307 308 #define LLC_MAX_SEQUENCE 128 309 #define LLC_MAX_WINDOW 127 310 #define LLC_WINDOW_SIZE 7 311 312 /* 313 * Don't we love this one? CCITT likes to suck on bits 8=) 314 */ 315 #define NLHDRSIZEGUESS 3 316 317 /* 318 * LLC control block 319 */ 320 321 struct llc_linkcb { 322 struct llccb_q { 323 struct llccb_q *q_forw; /* admin chain */ 324 struct llccb_q *q_backw; 325 } llcl_q; 326 struct npaidbentry *llcl_sapinfo; /* SAP information */ 327 struct sockaddr_dl llcl_addr; /* link snpa address */ 328 struct rtentry *llcl_nlrt; /* layer 3 -> LLC */ 329 struct rtentry *llcl_llrt; /* LLC -> layer 3 */ 330 struct ifnet *llcl_if; /* our interface */ 331 caddr_t llcl_nlnext; /* cb for network layer */ 332 struct mbuf *llcl_writeqh; /* Write queue head */ 333 struct mbuf *llcl_writeqt; /* Write queue tail */ 334 struct mbuf **llcl_output_buffers; 335 short llcl_timers[6]; /* timer array */ 336 long llcl_timerflags; /* flags signalling running timers */ 337 int (*llcl_statehandler) 338 __P((struct llc_linkcb *,struct llc *,int,int,int)); 339 int llcl_P_flag; 340 int llcl_F_flag; 341 int llcl_S_flag; 342 int llcl_DATA_flag; 343 int llcl_REMOTE_BUSY_flag; 344 int llcl_DACTION_flag; /* delayed action */ 345 int llcl_retry; 346 /* 347 * The following components deal --- in one way or the other --- 348 * with the LLC2 window. Indicated by either [L] or [W] is the 349 * domain of the specific component: 350 * 351 * [L] The domain is 0--LLC_MAX_WINDOW 352 * [W] The domain is 0--llcl_window 353 */ 354 short llcl_vr; /* next to receive [L] */ 355 short llcl_vs; /* next to send [L] */ 356 short llcl_nr_received; /* next frame to b ack'd [L] */ 357 short llcl_freeslot; /* next free slot [W] */ 358 short llcl_projvs; /* V(S) associated with freeslot */ 359 short llcl_slotsfree; /* free slots [W] */ 360 short llcl_window; /* window size */ 361 /* 362 * In llcl_frmrinfo we jot down the last frmr info field,which we 363 * need to do as we need to be able to resend it in the ERROR state. 364 */ 365 struct frmrinfo llcl_frmrinfo; /* last FRMR info field */ 366 }; 367 #define llcl_frmr_pdu0 llcl_frmrinfo.frmr_rej_pdu0 368 #define llcl_frmr_pdu1 llcl_frmrinfo.frmr_rej_pdu1 369 #define llcl_frmr_control llcl_frmrinfo.frmr_control 370 #define llcl_frmr_control_ext llcl_frmrinfo.frmr_control_ext 371 #define llcl_frmr_cause llcl_frmrinfo.frmr_cause 372 373 #define LQNEXT(l) (struct llc_linkcb *)((l)->llcl_q.q_forw) 374 #define LQEMPTY (llccb_q.q_forw == &llccb_q) 375 #define LQFIRST (struct llc_linkcb *)(llccb_q.q_forw) 376 #define LQVALID(l) (!((struct llccb_q *)(l) == &llccb_q)) 377 378 #define LLC_ENQUEUE(l,m) if ((l)->llcl_writeqh == NULL) { \ 379 (l)->llcl_writeqh = (m); \ 380 (l)->llcl_writeqt = (m); \ 381 } else { \ 382 (l)->llcl_writeqt->m_nextpkt = (m); \ 383 (l)->llcl_writeqt = (m); \ 384 } 385 386 #define LLC_DEQUEUE(l,m) if ((l)->llcl_writeqh == NULL) \ 387 (m) = NULL; \ 388 else { \ 389 (m) = (l)->llcl_writeqh; \ 390 (l)->llcl_writeqh = (l)->llcl_writeqh->m_nextpkt; \ 391 } 392 393 #define LLC_SETFRAME(l,m) { \ 394 if ((l)->llcl_slotsfree > 0) { \ 395 (l)->llcl_slotsfree--; \ 396 (l)->llcl_output_buffers[(l)->llcl_freeslot] = (m); \ 397 (l)->llcl_freeslot = ((l)->llcl_freeslot+1) % (l)->llcl_window; \ 398 LLC_INC((l)->llcl_projvs); \ 399 } \ 400 } 401 402 /* 403 * handling of sockaddr_dl's 404 */ 405 406 #define LLADDRLEN(s) ((s)->sdl_alen + (s)->sdl_nlen) 407 #define LLSAPADDR(s) ((s)->sdl_data[LLADDRLEN(s)-1] & 0xff) 408 #define LLSAPLOC(s,if) ((s)->sdl_nlen + (if)->if_addrlen) 409 410 struct sdl_hdr { 411 struct sockaddr_dl sdlhdr_dst; 412 struct sockaddr_dl sdlhdr_src; 413 long sdlhdr_len; 414 }; 415 416 #define LLC_GETHDR(f,m) { \ 417 struct mbuf *_m = (struct mbuf *) (m); \ 418 if (_m) { \ 419 M_PREPEND(_m,LLC_ISFRAMELEN,M_DONTWAIT); \ 420 bzero(mtod(_m,caddr_t),LLC_ISFRAMELEN); \ 421 } else { \ 422 MGETHDR (_m,M_DONTWAIT,MT_HEADER); \ 423 if (_m != NULL) { \ 424 _m->m_pkthdr.len = _m->m_len = LLC_UFRAMELEN; \ 425 _m->m_next = _m->m_nextpkt = NULL; \ 426 bzero(mtod(_m,caddr_t),LLC_UFRAMELEN); \ 427 } else return; \ 428 } \ 429 (m) = _m; \ 430 (f) = mtod(m,struct llc *); \ 431 } 432 433 #define LLC_NEWSTATE(l,LLCstate) \ 434 (l)->llcl_statehandler = __CONCAT(llc_state_,LLCstate) 435 #define LLC_STATEEQ(l,LLCstate) \ 436 ((l)->llcl_statehandler == __CONCAT(llc_state_,LLCstate) ? 1 : 0) 437 438 #define LLC_ACK_SHIFT 0 439 #define LLC_P_SHIFT 1 440 #define LLC_BUSY_SHIFT 2 441 #define LLC_REJ_SHIFT 3 442 #define LLC_AGE_SHIFT 4 443 #define LLC_DACTION_SHIFT 5 444 445 #define LLC_TIMER_NOTRUNNING 0 446 #define LLC_TIMER_RUNNING 1 447 #define LLC_TIMER_EXPIRED 2 448 449 #ifndef __CONCAT3 450 # if __STDC__ 451 # define __CONCAT3(a,b,c) a ## b ## c 452 # else 453 # define __CONCAT3(a,b,c) a/**/b/**/c 454 # endif /* __STDC__ */ 455 #endif 456 457 #define LLC_STARTTIMER(l,LLCtimer) { \ 458 (l)->llcl_timers[__CONCAT3(LLC_,LLCtimer,_SHIFT)] = \ 459 __CONCAT3(llc_,LLCtimer,_timer); \ 460 (l)->llcl_timerflags |= (1 << __CONCAT3(LLC_,LLCtimer,_SHIFT)); \ 461 } 462 #define LLC_STOPTIMER(l,LLCtimer) { \ 463 (l)->llcl_timers[__CONCAT3(LLC_,LLCtimer,_SHIFT)] = 0; \ 464 (l)->llcl_timerflags &= ~(1<<__CONCAT3(LLC_,LLCtimer,_SHIFT)); \ 465 } 466 #define LLC_AGETIMER(l,LLCtimer) \ 467 if ((l)->llcl_timers[__CONCAT3(LLC_,LLCtimer,_SHIFT)] > 0) \ 468 (l)->llcl_timers[__CONCAT3(LLC_,LLCtimer,_SHIFT)]--; 469 470 #define LLC_TIMERXPIRED(l,LLCtimer) \ 471 (((l)->llcl_timerflags & (1<<__CONCAT3(LLC_,LLCtimer,_SHIFT))) ? \ 472 (((l)->llcl_timers[__CONCAT3(LLC_,LLCtimer,_SHIFT)] == 0 ) ? \ 473 LLC_TIMER_EXPIRED : LLC_TIMER_RUNNING) : LLC_TIMER_NOTRUNNING) 474 475 #define FOR_ALL_LLC_TIMERS(t) \ 476 for ((t) = LLC_ACK_SHIFT; (t) < LLC_AGE_SHIFT; (t)++) 477 478 #define LLC_SETFLAG(l,LLCflag,v) (l)->__CONCAT3(llcl_,LLCflag,_flag) = (v) 479 #define LLC_GETFLAG(l,LLCflag) (l)->__CONCAT3(llcl_,LLCflag,_flag) 480 481 #define LLC_RESETCOUNTER(l) { \ 482 (l)->llcl_vs = (l)->llcl_vr = (l)->llcl_retry = 0; \ 483 llc_resetwindow((l)); \ 484 } 485 486 /* 487 * LLC2 macro definitions 488 */ 489 490 491 #define LLC_START_ACK_TIMER(l) LLC_STARTTIMER((l),ACK) 492 #define LLC_STOP_ACK_TIMER(l) LLC_STOPTIMER((l),ACK) 493 #define LLC_START_REJ_TIMER(l) LLC_STARTTIMER((l),REJ) 494 #define LLC_STOP_REJ_TIMER(l) LLC_STOPTIMER((l),REJ) 495 #define LLC_START_P_TIMER(l) { \ 496 LLC_STARTTIMER((l),P); \ 497 if (LLC_GETFLAG((l),P) == 0) \ 498 (l)->llcl_retry = 0; \ 499 LLC_SETFLAG((l),P,1); \ 500 } 501 #define LLC_STOP_P_TIMER(l) { \ 502 LLC_STOPTIMER((l),P); \ 503 LLC_SETFLAG((l),P,0); \ 504 } 505 #define LLC_STOP_ALL_TIMERS(l) { \ 506 LLC_STOPTIMER((l),ACK); \ 507 LLC_STOPTIMER((l),REJ); \ 508 LLC_STOPTIMER((l),BUSY); \ 509 LLC_STOPTIMER((l),P); \ 510 } 511 512 513 #define LLC_INC(i) (i) = ((i)+1) % LLC_MAX_SEQUENCE 514 515 #define LLC_NR_VALID(l,nr) \ 516 ((l)->llcl_vs < (l)->llcl_nr_received ? \ 517 (((nr) >= (l)->llcl_nr_received) || \ 518 ((nr) <= (l)->llcl_vs) ? 1 : 0) : \ 519 (((nr) <= (l)->llcl_vs) && \ 520 ((nr) >= (l)->llcl_nr_received) ? 1 : 0)) 521 522 #define LLC_UPDATE_P_FLAG(l,cr,pf) { \ 523 if ((cr) == LLC_RSP && (pf) == 1) { \ 524 LLC_SETFLAG((l),P,0); \ 525 LLC_STOPTIMER((l),P); \ 526 } \ 527 } 528 529 #define LLC_UPDATE_NR_RECEIVED(l,nr) { \ 530 while ((l)->llcl_nr_received != (nr)) { \ 531 struct mbuf *_m; \ 532 short seq; \ 533 seq = llc_seq2slot((l),(l)->llcl_nr_received); \ 534 if ((_m = (l)->llcl_output_buffers[seq]) != NULL) \ 535 m_freem(_m); \ 536 (l)->llcl_output_buffers[seq] = NULL; \ 537 LLC_INC((l)->llcl_nr_received); \ 538 (l)->llcl_slotsfree++; \ 539 } \ 540 (l)->llcl_retry = 0; \ 541 if ((l)->llcl_slotsfree < (l)->llcl_window) { \ 542 LLC_START_ACK_TIMER(l); \ 543 } else { \ 544 LLC_STOP_ACK_TIMER(l); \ 545 } \ 546 LLC_STARTTIMER((l),DACTION); \ 547 } 548 549 #define LLC_SET_REMOTE_BUSY(l,a) { \ 550 if (LLC_GETFLAG((l),REMOTE_BUSY) == 0) { \ 551 LLC_SETFLAG((l),REMOTE_BUSY,1); \ 552 LLC_STARTTIMER((l),BUSY); \ 553 (a) = LLC_REMOTE_BUSY; \ 554 } else { \ 555 (a) = 0; \ 556 } \ 557 } 558 559 #define LLC_CLEAR_REMOTE_BUSY(l,a) { \ 560 if (LLC_GETFLAG((l),REMOTE_BUSY) == 1) { \ 561 LLC_SETFLAG((l),REMOTE_BUSY,1); \ 562 LLC_STOPTIMER((l),BUSY); \ 563 if (LLC_STATEEQ((l),NORMAL) || \ 564 LLC_STATEEQ((l),REJECT) || \ 565 LLC_STATEEQ((l),BUSY)) \ 566 llc_resend((l),LLC_CMD,0); \ 567 (a) = LLC_REMOTE_NOT_BUSY; \ 568 } else { \ 569 (a) = 0; \ 570 } \ 571 } 572 573 #define LLC_DACKCMD 0x1 574 #define LLC_DACKCMDPOLL 0x2 575 #define LLC_DACKRSP 0x3 576 #define LLC_DACKRSPFINAL 0x4 577 578 #define LLC_SENDACKNOWLEDGE(l,cmd,pf) { \ 579 if ((cmd) == LLC_CMD) { \ 580 LLC_SETFLAG((l),DACTION,((pf) == 0 ? LLC_DACKCMD : \ 581 LLC_DACKCMDPOLL)); \ 582 } else { \ 583 LLC_SETFLAG((l),DACTION,((pf) == 0 ? LLC_DACKRSP : \ 584 LLC_DACKRSPFINAL)); \ 585 } \ 586 } 587 588 #define LLC_FRMR_W (1<<0) 589 #define LLC_FRMR_X (1<<1) 590 #define LLC_FRMR_Y (1<<2) 591 #define LLC_FRMR_Z (1<<3) 592 #define LLC_FRMR_V (1<<4) 593 594 #define LLC_SETFRMR(l,f,cr,c) { \ 595 if ((f)->llc_control & 0x3) { \ 596 (l)->llcl_frmr_pdu0 = (f)->llc_control; \ 597 (l)->llcl_frmr_pdu1 = 0; \ 598 } else { \ 599 (l)->llcl_frmr_pdu0 = (f)->llc_control; \ 600 (l)->llcl_frmr_pdu1 = (f)->llc_control_ext; \ 601 } \ 602 LLCCSBITS((l)->llcl_frmr_control,f_vs,(l)->llcl_vs); \ 603 LLCCSBITS((l)->llcl_frmr_control_ext,f_cr,(cr)); \ 604 LLCSBITS((l)->llcl_frmr_control_ext,f_vr,(l)->llcl_vr); \ 605 LLCCSBITS((l)->llcl_frmr_cause,f_wxyzv,(c)); \ 606 } 607 608 /* 609 * LLC tracing levels: 610 * LLCTR_INTERESTING interesting event,we might care to know about 611 * it,but then again,we might not ... 612 * LLCTR_SHOULDKNOW we probably should know about this event 613 * LLCTR_URGENT something has gone utterly wrong ... 614 */ 615 #define LLCTR_INTERESTING 1 616 #define LLCTR_SHOULDKNOW 2 617 #define LLCTR_URGENT 3 618 619 #ifdef LLCDEBUG 620 #define LLC_TRACE(lp,l,msg) llc_trace((lp),(l),(msg)) 621 #else /* LLCDEBUG */ 622 #define LLC_TRACE(lp,l,msg) /* NOOP */ 623 #endif /* LLCDEBUG */ 624 625 #define LLC_N2_VALUE 15 /* up to 15 retries */ 626 #define LLC_ACK_TIMER 10 /* 5 secs */ 627 #define LLC_P_TIMER 4 /* 2 secs */ 628 #define LLC_BUSY_TIMER 12 /* 6 secs */ 629 #define LLC_REJ_TIMER 12 /* 6 secs */ 630 #define LLC_AGE_TIMER 40 /* 20 secs */ 631 #define LLC_DACTION_TIMER 2 /* 1 secs */ 632 633 #if defined (_KERNEL) 634 extern int llc_n2; 635 extern int llc_ACK_timer; 636 extern int llc_P_timer; 637 extern int llc_REJ_timer; 638 extern int llc_BUSY_timer; 639 extern int llc_AGE_timer; 640 extern int llc_DACTION_timer; 641 642 extern int af_link_rts_init_done; 643 644 #define USES_AF_LINK_RTS { \ 645 if (!af_link_rts_init_done) { \ 646 rn_inithead((void **)&rt_tables[AF_LINK],32); \ 647 af_link_rts_init_done++; \ 648 } \ 649 } 650 651 extern struct ifqueue llcintrq; 652 653 extern struct llccb_q llccb_q; 654 extern char *frame_names[]; 655 656 /* 657 * Function prototypes 658 */ 659 /* llc_input.c */ 660 void llcintr __P((void)); 661 int llc_input __P((struct mbuf *, ...)); 662 void *llc_ctlinput __P((int, struct sockaddr *, void *)); 663 664 /* llc_output.c */ 665 int llc_output __P((struct mbuf *, ...)); 666 void llc_start __P((struct llc_linkcb *)); 667 void llc_send __P((struct llc_linkcb *, int, int, int)); 668 void llc_resend __P((struct llc_linkcb *, int, int)); 669 void llc_rawsend __P((struct llc_linkcb *, struct mbuf *, struct llc *, int, 670 int, int, int)); 671 672 /* llc_subr.c */ 673 int sdl_cmp __P((struct sockaddr_dl *, struct sockaddr_dl *)); 674 void sdl_copy __P((struct sockaddr_dl *, struct sockaddr_dl *)); 675 void sdl_swapaddr __P((struct sockaddr_dl *, struct sockaddr_dl *)); 676 struct sockaddr_dl *sdl_getaddrif __P((struct ifnet *)); 677 int sdl_checkaddrif __P((struct ifnet *, struct sockaddr_dl *)); 678 int sdl_setaddrif __P((struct ifnet *, u_char *, u_char, u_char, 679 struct sockaddr_dl *)); 680 int sdl_sethdrif __P((struct ifnet *, u_char *, u_char, u_char *, u_char, 681 u_char, struct sdl_hdr *)); 682 struct npaidbentry *llc_setsapinfo __P((struct ifnet *, u_char, u_char, 683 struct dllconfig *)); 684 struct npaidbentry *llc_getsapinfo __P((u_char, struct ifnet *)); 685 short llc_seq2slot __P((struct llc_linkcb *, short)); 686 int llc_state_ADM __P((struct llc_linkcb *, struct llc *, int, int, int)); 687 int llc_state_CONN __P((struct llc_linkcb *, struct llc *, int, int, int)); 688 int llc_state_RESET_WAIT __P((struct llc_linkcb *, struct llc *, int, 689 int, int)); 690 int llc_state_RESET_CHECK __P((struct llc_linkcb *, struct llc *, int, 691 int, int)); 692 int llc_state_SETUP __P((struct llc_linkcb *, struct llc *, int, int, int)); 693 int llc_state_RESET __P((struct llc_linkcb *, struct llc *, int, int, int)); 694 int llc_state_D_CONN __P((struct llc_linkcb *, struct llc *, int, int, int)); 695 int llc_state_ERROR __P((struct llc_linkcb *, struct llc *, int, int, int)); 696 int llc_state_NBRAcore __P((struct llc_linkcb *, struct llc *, int, int, int)); 697 int llc_state_NORMAL __P((struct llc_linkcb *, struct llc *, int, int, int)); 698 int llc_state_BUSY __P((struct llc_linkcb *, struct llc *, int, int, int)); 699 int llc_state_REJECT __P((struct llc_linkcb *, struct llc *, int, int, int)); 700 int llc_state_AWAIT __P((struct llc_linkcb *, struct llc *, int, int, int)); 701 int llc_state_AWAIT_BUSY __P((struct llc_linkcb *, struct llc *, int, int, 702 int)); 703 int llc_state_AWAIT_REJECT __P((struct llc_linkcb *, struct llc *, int, int, 704 int)); 705 int llc_statehandler __P((struct llc_linkcb *, struct llc *, int, int, int)); 706 void llc_init __P((void)); 707 void llc_resetwindow __P((struct llc_linkcb *)); 708 struct llc_linkcb *llc_newlink __P((struct sockaddr_dl *, struct ifnet *, 709 struct rtentry *, caddr_t, 710 struct rtentry *)); 711 void llc_dellink __P((struct llc_linkcb *)); 712 int llc_decode __P((struct llc *, struct llc_linkcb *)); 713 int llc_anytimersup __P((struct llc_linkcb *)); 714 char *llc_getstatename __P((struct llc_linkcb *)); 715 void llc_link_dump __P((struct llc_linkcb *, const char *)); 716 void llc_trace __P((struct llc_linkcb *, int, const char *)); 717 718 /* llc_timer.c */ 719 void llc_timer __P((void)); 720 721 #endif
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