if_ppp.c revision 1.98
1 /* $NetBSD: if_ppp.c,v 1.98 2005/03/31 17:07:39 explorer Exp $ */ 2 /* Id: if_ppp.c,v 1.6 1997/03/04 03:33:00 paulus Exp */ 3 4 /* 5 * if_ppp.c - Point-to-Point Protocol (PPP) Asynchronous driver. 6 * 7 * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. The name "Carnegie Mellon University" must not be used to 22 * endorse or promote products derived from this software without 23 * prior written permission. For permission or any legal 24 * details, please contact 25 * Office of Technology Transfer 26 * Carnegie Mellon University 27 * 5000 Forbes Avenue 28 * Pittsburgh, PA 15213-3890 29 * (412) 268-4387, fax: (412) 268-7395 30 * tech-transfer (at) andrew.cmu.edu 31 * 32 * 4. Redistributions of any form whatsoever must retain the following 33 * acknowledgment: 34 * "This product includes software developed by Computing Services 35 * at Carnegie Mellon University (http://www.cmu.edu/computing/)." 36 * 37 * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO 38 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 39 * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE 40 * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 41 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN 42 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 43 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 44 * 45 * Based on: 46 * @(#)if_sl.c 7.6.1.2 (Berkeley) 2/15/89 47 * 48 * Copyright (c) 1987 Regents of the University of California. 49 * All rights reserved. 50 * 51 * Redistribution and use in source and binary forms are permitted 52 * provided that the above copyright notice and this paragraph are 53 * duplicated in all such forms and that any documentation, 54 * advertising materials, and other materials related to such 55 * distribution and use acknowledge that the software was developed 56 * by the University of California, Berkeley. The name of the 57 * University may not be used to endorse or promote products derived 58 * from this software without specific prior written permission. 59 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 60 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 61 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 62 * 63 * Serial Line interface 64 * 65 * Rick Adams 66 * Center for Seismic Studies 67 * 1300 N 17th Street, Suite 1450 68 * Arlington, Virginia 22209 69 * (703)276-7900 70 * rick (at) seismo.ARPA 71 * seismo!rick 72 * 73 * Pounded on heavily by Chris Torek (chris (at) mimsy.umd.edu, umcp-cs!chris). 74 * Converted to 4.3BSD Beta by Chris Torek. 75 * Other changes made at Berkeley, based in part on code by Kirk Smith. 76 * 77 * Converted to 4.3BSD+ 386BSD by Brad Parker (brad (at) cayman.com) 78 * Added VJ tcp header compression; more unified ioctls 79 * 80 * Extensively modified by Paul Mackerras (paulus (at) cs.anu.edu.au). 81 * Cleaned up a lot of the mbuf-related code to fix bugs that 82 * caused system crashes and packet corruption. Changed pppstart 83 * so that it doesn't just give up with a collision if the whole 84 * packet doesn't fit in the output ring buffer. 85 * 86 * Added priority queueing for interactive IP packets, following 87 * the model of if_sl.c, plus hooks for bpf. 88 * Paul Mackerras (paulus (at) cs.anu.edu.au). 89 */ 90 91 /* from if_sl.c,v 1.11 84/10/04 12:54:47 rick Exp */ 92 /* from NetBSD: if_ppp.c,v 1.15.2.2 1994/07/28 05:17:58 cgd Exp */ 93 94 /* 95 * XXX IMP ME HARDER 96 * 97 * This is an explanation of that comment. This code used to use 98 * splimp() to block both network and tty interrupts. However, 99 * that call is deprecated. So, we have replaced the uses of 100 * splimp() with splhigh() in order to applomplish what it needs 101 * to accomplish, and added that happy little comment. 102 */ 103 104 #include <sys/cdefs.h> 105 __KERNEL_RCSID(0, "$NetBSD: if_ppp.c,v 1.98 2005/03/31 17:07:39 explorer Exp $"); 106 107 #include "ppp.h" 108 109 #include "opt_inet.h" 110 #include "opt_gateway.h" 111 #include "opt_ppp.h" 112 113 #ifdef INET 114 #define VJC 115 #endif 116 #define PPP_COMPRESS 117 118 #include <sys/param.h> 119 #include <sys/proc.h> 120 #include <sys/mbuf.h> 121 #include <sys/socket.h> 122 #include <sys/ioctl.h> 123 #include <sys/kernel.h> 124 #include <sys/systm.h> 125 #include <sys/time.h> 126 #include <sys/malloc.h> 127 128 #include <net/if.h> 129 #include <net/if_types.h> 130 #include <net/netisr.h> 131 #include <net/route.h> 132 #ifdef PPP_FILTER 133 #include <net/bpf.h> 134 #endif 135 136 #include <machine/intr.h> 137 138 #include <netinet/in.h> 139 #include <netinet/in_systm.h> 140 #include <netinet/in_var.h> 141 #ifdef INET 142 #include <netinet/ip.h> 143 #endif 144 145 #include "bpfilter.h" 146 #if NBPFILTER > 0 147 #include <sys/time.h> 148 #include <net/bpf.h> 149 #endif 150 151 #if defined(PPP_FILTER) || NBPFILTER > 0 152 #include <net/slip.h> 153 #endif 154 155 #ifdef VJC 156 #include <net/slcompress.h> 157 #endif 158 159 #include <net/ppp_defs.h> 160 #include <net/if_ppp.h> 161 #include <net/if_pppvar.h> 162 #include <machine/cpu.h> 163 164 #ifdef PPP_COMPRESS 165 #define PACKETPTR struct mbuf * 166 #include <net/ppp-comp.h> 167 #endif 168 169 static int pppsioctl __P((struct ifnet *, u_long, caddr_t)); 170 static void ppp_requeue __P((struct ppp_softc *)); 171 static void ppp_ccp __P((struct ppp_softc *, struct mbuf *m, int rcvd)); 172 static void ppp_ccp_closed __P((struct ppp_softc *)); 173 static void ppp_inproc __P((struct ppp_softc *, struct mbuf *)); 174 static void pppdumpm __P((struct mbuf *m0)); 175 #ifdef ALTQ 176 static void ppp_ifstart __P((struct ifnet *ifp)); 177 #endif 178 179 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 180 void pppnetisr(void); 181 #endif 182 void pppintr(void *); 183 184 /* 185 * Some useful mbuf macros not in mbuf.h. 186 */ 187 #define M_IS_CLUSTER(m) ((m)->m_flags & M_EXT) 188 189 #define M_DATASTART(m) \ 190 (M_IS_CLUSTER(m) ? (m)->m_ext.ext_buf : \ 191 (m)->m_flags & M_PKTHDR ? (m)->m_pktdat : (m)->m_dat) 192 193 #define M_DATASIZE(m) \ 194 (M_IS_CLUSTER(m) ? (m)->m_ext.ext_size : \ 195 (m)->m_flags & M_PKTHDR ? MHLEN: MLEN) 196 197 /* 198 * We define two link layer specific mbuf flags, to mark high-priority 199 * packets for output, and received packets following lost/corrupted 200 * packets. 201 */ 202 #define M_HIGHPRI M_LINK0 /* output packet for sc_fastq */ 203 #define M_ERRMARK M_LINK1 /* rx packet following lost/corrupted pkt */ 204 205 static int ppp_clone_create(struct if_clone *, int); 206 static int ppp_clone_destroy(struct ifnet *); 207 208 static struct ppp_softc *ppp_create(const char *, int); 209 210 static LIST_HEAD(, ppp_softc) ppp_softc_list; 211 212 struct if_clone ppp_cloner = 213 IF_CLONE_INITIALIZER("ppp", ppp_clone_create, ppp_clone_destroy); 214 215 static struct simplelock ppp_list_mutex = SIMPLELOCK_INITIALIZER; 216 217 #ifdef PPP_COMPRESS 218 /* 219 * List of compressors we know about. 220 * We leave some space so maybe we can modload compressors. 221 */ 222 223 extern struct compressor ppp_bsd_compress; 224 extern struct compressor ppp_deflate, ppp_deflate_draft; 225 226 struct compressor *ppp_compressors[PPP_COMPRESSORS_MAX] = { 227 #if DO_BSD_COMPRESS && defined(PPP_BSDCOMP) 228 &ppp_bsd_compress, 229 #endif 230 #if DO_DEFLATE && defined(PPP_DEFLATE) 231 &ppp_deflate, 232 &ppp_deflate_draft, 233 #endif 234 NULL 235 }; 236 #endif /* PPP_COMPRESS */ 237 238 239 /* 240 * Called from boot code to establish ppp interfaces. 241 */ 242 void 243 pppattach(void) 244 { 245 LIST_INIT(&ppp_softc_list); 246 if_clone_attach(&ppp_cloner); 247 } 248 249 static struct ppp_softc * 250 ppp_create(const char *name, int unit) 251 { 252 struct ppp_softc *sc, *sci, *scl = NULL; 253 254 MALLOC(sc, struct ppp_softc *, sizeof(*sc), M_DEVBUF, M_WAIT|M_ZERO); 255 256 simple_lock(&ppp_list_mutex); 257 if (unit == -1) { 258 int i = 0; 259 LIST_FOREACH(sci, &ppp_softc_list, sc_iflist) { 260 scl = sci; 261 if (i < sci->sc_unit) { 262 unit = i; 263 break; 264 } else { 265 #ifdef DIAGNOSTIC 266 KASSERT(i == sci->sc_unit); 267 #endif 268 i++; 269 } 270 } 271 if (unit == -1) 272 unit = i; 273 } else { 274 LIST_FOREACH(sci, &ppp_softc_list, sc_iflist) { 275 scl = sci; 276 if (unit < sci->sc_unit) 277 break; 278 else if (unit == sci->sc_unit) { 279 FREE(sc, M_DEVBUF); 280 return NULL; 281 } 282 } 283 } 284 285 if (sci != NULL) 286 LIST_INSERT_BEFORE(sci, sc, sc_iflist); 287 else if (scl != NULL) 288 LIST_INSERT_AFTER(scl, sc, sc_iflist); 289 else 290 LIST_INSERT_HEAD(&ppp_softc_list, sc, sc_iflist); 291 292 simple_unlock(&ppp_list_mutex); 293 294 (void)snprintf(sc->sc_if.if_xname, sizeof(sc->sc_if.if_xname), "%s%d", 295 name, sc->sc_unit = unit); 296 callout_init(&sc->sc_timo_ch); 297 sc->sc_if.if_softc = sc; 298 sc->sc_if.if_mtu = PPP_MTU; 299 sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST; 300 sc->sc_if.if_type = IFT_PPP; 301 sc->sc_if.if_hdrlen = PPP_HDRLEN; 302 sc->sc_if.if_dlt = DLT_NULL; 303 sc->sc_if.if_ioctl = pppsioctl; 304 sc->sc_if.if_output = pppoutput; 305 #ifdef ALTQ 306 sc->sc_if.if_start = ppp_ifstart; 307 #endif 308 IFQ_SET_MAXLEN(&sc->sc_if.if_snd, IFQ_MAXLEN); 309 sc->sc_inq.ifq_maxlen = IFQ_MAXLEN; 310 sc->sc_fastq.ifq_maxlen = IFQ_MAXLEN; 311 sc->sc_rawq.ifq_maxlen = IFQ_MAXLEN; 312 IFQ_SET_READY(&sc->sc_if.if_snd); 313 if_attach(&sc->sc_if); 314 if_alloc_sadl(&sc->sc_if); 315 #if NBPFILTER > 0 316 bpfattach(&sc->sc_if, DLT_NULL, 0); 317 #endif 318 return sc; 319 } 320 321 static int 322 ppp_clone_create(struct if_clone *ifc, int unit) 323 { 324 return ppp_create(ifc->ifc_name, unit) == NULL ? EEXIST : 0; 325 } 326 327 static int 328 ppp_clone_destroy(struct ifnet *ifp) 329 { 330 struct ppp_softc *sc = (struct ppp_softc *)ifp->if_softc; 331 332 if (sc->sc_devp != NULL) 333 return EBUSY; /* Not removing it */ 334 335 simple_lock(&ppp_list_mutex); 336 LIST_REMOVE(sc, sc_iflist); 337 simple_unlock(&ppp_list_mutex); 338 339 #if NBPFILTER > 0 340 bpfdetach(ifp); 341 #endif 342 if_detach(ifp); 343 344 FREE(sc, M_DEVBUF); 345 return 0; 346 } 347 348 /* 349 * Allocate a ppp interface unit and initialize it. 350 */ 351 struct ppp_softc * 352 pppalloc(pid) 353 pid_t pid; 354 { 355 struct ppp_softc *sc = NULL, *scf; 356 int i; 357 358 simple_lock(&ppp_list_mutex); 359 for (scf = LIST_FIRST(&ppp_softc_list); scf != NULL; 360 scf = LIST_NEXT(scf, sc_iflist)) { 361 if (scf->sc_xfer == pid) { 362 scf->sc_xfer = 0; 363 simple_unlock(&ppp_list_mutex); 364 return scf; 365 } 366 if (scf->sc_devp == NULL && sc == NULL) 367 sc = scf; 368 } 369 simple_unlock(&ppp_list_mutex); 370 371 if (sc == NULL) 372 sc = ppp_create(ppp_cloner.ifc_name, -1); 373 374 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 375 sc->sc_si = softintr_establish(IPL_SOFTNET, pppintr, sc); 376 if (sc->sc_si == NULL) { 377 printf("%s: unable to establish softintr\n", sc->sc_if.if_xname); 378 return (NULL); 379 } 380 #endif 381 sc->sc_flags = 0; 382 sc->sc_mru = PPP_MRU; 383 sc->sc_relinq = NULL; 384 (void)memset(&sc->sc_stats, 0, sizeof(sc->sc_stats)); 385 #ifdef VJC 386 MALLOC(sc->sc_comp, struct slcompress *, sizeof(struct slcompress), 387 M_DEVBUF, M_NOWAIT); 388 if (sc->sc_comp) 389 sl_compress_init(sc->sc_comp); 390 #endif 391 #ifdef PPP_COMPRESS 392 sc->sc_xc_state = NULL; 393 sc->sc_rc_state = NULL; 394 #endif /* PPP_COMPRESS */ 395 for (i = 0; i < NUM_NP; ++i) 396 sc->sc_npmode[i] = NPMODE_ERROR; 397 sc->sc_npqueue = NULL; 398 sc->sc_npqtail = &sc->sc_npqueue; 399 sc->sc_last_sent = sc->sc_last_recv = time.tv_sec; 400 401 return sc; 402 } 403 404 /* 405 * Deallocate a ppp unit. Must be called at splsoftnet or higher. 406 */ 407 void 408 pppdealloc(sc) 409 struct ppp_softc *sc; 410 { 411 struct mbuf *m; 412 413 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 414 softintr_disestablish(sc->sc_si); 415 #endif 416 if_down(&sc->sc_if); 417 sc->sc_if.if_flags &= ~(IFF_UP|IFF_RUNNING); 418 sc->sc_devp = NULL; 419 sc->sc_xfer = 0; 420 for (;;) { 421 IF_DEQUEUE(&sc->sc_rawq, m); 422 if (m == NULL) 423 break; 424 m_freem(m); 425 } 426 for (;;) { 427 IF_DEQUEUE(&sc->sc_inq, m); 428 if (m == NULL) 429 break; 430 m_freem(m); 431 } 432 for (;;) { 433 IF_DEQUEUE(&sc->sc_fastq, m); 434 if (m == NULL) 435 break; 436 m_freem(m); 437 } 438 while ((m = sc->sc_npqueue) != NULL) { 439 sc->sc_npqueue = m->m_nextpkt; 440 m_freem(m); 441 } 442 if (sc->sc_togo != NULL) { 443 m_freem(sc->sc_togo); 444 sc->sc_togo = NULL; 445 } 446 #ifdef PPP_COMPRESS 447 ppp_ccp_closed(sc); 448 sc->sc_xc_state = NULL; 449 sc->sc_rc_state = NULL; 450 #endif /* PPP_COMPRESS */ 451 #ifdef PPP_FILTER 452 if (sc->sc_pass_filt_in.bf_insns != 0) { 453 FREE(sc->sc_pass_filt_in.bf_insns, M_DEVBUF); 454 sc->sc_pass_filt_in.bf_insns = 0; 455 sc->sc_pass_filt_in.bf_len = 0; 456 } 457 if (sc->sc_pass_filt_out.bf_insns != 0) { 458 FREE(sc->sc_pass_filt_out.bf_insns, M_DEVBUF); 459 sc->sc_pass_filt_out.bf_insns = 0; 460 sc->sc_pass_filt_out.bf_len = 0; 461 } 462 if (sc->sc_active_filt_in.bf_insns != 0) { 463 FREE(sc->sc_active_filt_in.bf_insns, M_DEVBUF); 464 sc->sc_active_filt_in.bf_insns = 0; 465 sc->sc_active_filt_in.bf_len = 0; 466 } 467 if (sc->sc_active_filt_out.bf_insns != 0) { 468 FREE(sc->sc_active_filt_out.bf_insns, M_DEVBUF); 469 sc->sc_active_filt_out.bf_insns = 0; 470 sc->sc_active_filt_out.bf_len = 0; 471 } 472 #endif /* PPP_FILTER */ 473 #ifdef VJC 474 if (sc->sc_comp != 0) { 475 FREE(sc->sc_comp, M_DEVBUF); 476 sc->sc_comp = 0; 477 } 478 #endif 479 (void)ppp_clone_destroy(&sc->sc_if); 480 } 481 482 /* 483 * Ioctl routine for generic ppp devices. 484 */ 485 int 486 pppioctl(sc, cmd, data, flag, p) 487 struct ppp_softc *sc; 488 u_long cmd; 489 caddr_t data; 490 int flag; 491 struct proc *p; 492 { 493 int s, error, flags, mru, npx; 494 u_int nb; 495 struct ppp_option_data *odp; 496 struct compressor **cp; 497 struct npioctl *npi; 498 time_t t; 499 #ifdef PPP_FILTER 500 struct bpf_program *bp, *nbp; 501 struct bpf_insn *newcode, *oldcode; 502 int newcodelen; 503 #endif /* PPP_FILTER */ 504 #ifdef PPP_COMPRESS 505 u_char ccp_option[CCP_MAX_OPTION_LENGTH]; 506 #endif 507 508 switch (cmd) { 509 case FIONREAD: 510 *(int *)data = sc->sc_inq.ifq_len; 511 break; 512 513 case PPPIOCGUNIT: 514 *(int *)data = sc->sc_unit; 515 break; 516 517 case PPPIOCGFLAGS: 518 *(u_int *)data = sc->sc_flags; 519 break; 520 521 case PPPIOCGRAWIN: 522 { 523 struct ppp_rawin *rwin = (struct ppp_rawin *)data; 524 u_char p, q = 0; 525 526 for (p = sc->sc_rawin_start; p < sizeof(sc->sc_rawin.buf);) 527 rwin->buf[q++] = sc->sc_rawin.buf[p++]; 528 529 for (p = 0; p < sc->sc_rawin_start;) 530 rwin->buf[q++] = sc->sc_rawin.buf[p++]; 531 532 rwin->count = sc->sc_rawin.count; 533 } 534 break; 535 536 case PPPIOCSFLAGS: 537 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 538 return (error); 539 flags = *(int *)data & SC_MASK; 540 s = splsoftnet(); 541 #ifdef PPP_COMPRESS 542 if (sc->sc_flags & SC_CCP_OPEN && !(flags & SC_CCP_OPEN)) 543 ppp_ccp_closed(sc); 544 #endif 545 splhigh(); /* XXX IMP ME HARDER */ 546 sc->sc_flags = (sc->sc_flags & ~SC_MASK) | flags; 547 splx(s); 548 break; 549 550 case PPPIOCSMRU: 551 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 552 return (error); 553 mru = *(int *)data; 554 if (mru >= PPP_MINMRU && mru <= PPP_MAXMRU) 555 sc->sc_mru = mru; 556 break; 557 558 case PPPIOCGMRU: 559 *(int *)data = sc->sc_mru; 560 break; 561 562 #ifdef VJC 563 case PPPIOCSMAXCID: 564 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 565 return (error); 566 if (sc->sc_comp) { 567 s = splsoftnet(); 568 sl_compress_setup(sc->sc_comp, *(int *)data); 569 splx(s); 570 } 571 break; 572 #endif 573 574 case PPPIOCXFERUNIT: 575 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 576 return (error); 577 sc->sc_xfer = p->p_pid; 578 break; 579 580 #ifdef PPP_COMPRESS 581 case PPPIOCSCOMPRESS: 582 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 583 return (error); 584 odp = (struct ppp_option_data *) data; 585 nb = odp->length; 586 if (nb > sizeof(ccp_option)) 587 nb = sizeof(ccp_option); 588 if ((error = copyin(odp->ptr, ccp_option, nb)) != 0) 589 return (error); 590 if (ccp_option[1] < 2) /* preliminary check on the length byte */ 591 return (EINVAL); 592 for (cp = ppp_compressors; *cp != NULL; ++cp) 593 if ((*cp)->compress_proto == ccp_option[0]) { 594 /* 595 * Found a handler for the protocol - try to allocate 596 * a compressor or decompressor. 597 */ 598 error = 0; 599 if (odp->transmit) { 600 s = splsoftnet(); 601 if (sc->sc_xc_state != NULL) 602 (*sc->sc_xcomp->comp_free)(sc->sc_xc_state); 603 sc->sc_xcomp = *cp; 604 sc->sc_xc_state = (*cp)->comp_alloc(ccp_option, nb); 605 if (sc->sc_xc_state == NULL) { 606 if (sc->sc_flags & SC_DEBUG) 607 printf("%s: comp_alloc failed\n", 608 sc->sc_if.if_xname); 609 error = ENOBUFS; 610 } 611 splhigh(); /* XXX IMP ME HARDER */ 612 sc->sc_flags &= ~SC_COMP_RUN; 613 splx(s); 614 } else { 615 s = splsoftnet(); 616 if (sc->sc_rc_state != NULL) 617 (*sc->sc_rcomp->decomp_free)(sc->sc_rc_state); 618 sc->sc_rcomp = *cp; 619 sc->sc_rc_state = (*cp)->decomp_alloc(ccp_option, nb); 620 if (sc->sc_rc_state == NULL) { 621 if (sc->sc_flags & SC_DEBUG) 622 printf("%s: decomp_alloc failed\n", 623 sc->sc_if.if_xname); 624 error = ENOBUFS; 625 } 626 splhigh(); /* XXX IMP ME HARDER */ 627 sc->sc_flags &= ~SC_DECOMP_RUN; 628 splx(s); 629 } 630 return (error); 631 } 632 if (sc->sc_flags & SC_DEBUG) 633 printf("%s: no compressor for [%x %x %x], %x\n", 634 sc->sc_if.if_xname, ccp_option[0], ccp_option[1], 635 ccp_option[2], nb); 636 return (EINVAL); /* no handler found */ 637 #endif /* PPP_COMPRESS */ 638 639 case PPPIOCGNPMODE: 640 case PPPIOCSNPMODE: 641 npi = (struct npioctl *) data; 642 switch (npi->protocol) { 643 case PPP_IP: 644 npx = NP_IP; 645 break; 646 case PPP_IPV6: 647 npx = NP_IPV6; 648 break; 649 default: 650 return EINVAL; 651 } 652 if (cmd == PPPIOCGNPMODE) { 653 npi->mode = sc->sc_npmode[npx]; 654 } else { 655 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 656 return (error); 657 if (npi->mode != sc->sc_npmode[npx]) { 658 s = splnet(); 659 sc->sc_npmode[npx] = npi->mode; 660 if (npi->mode != NPMODE_QUEUE) { 661 ppp_requeue(sc); 662 ppp_restart(sc); 663 } 664 splx(s); 665 } 666 } 667 break; 668 669 case PPPIOCGIDLE: 670 s = splsoftnet(); 671 t = time.tv_sec; 672 ((struct ppp_idle *)data)->xmit_idle = t - sc->sc_last_sent; 673 ((struct ppp_idle *)data)->recv_idle = t - sc->sc_last_recv; 674 splx(s); 675 break; 676 677 #ifdef PPP_FILTER 678 case PPPIOCSPASS: 679 case PPPIOCSACTIVE: 680 /* These are no longer supported. */ 681 return EOPNOTSUPP; 682 683 case PPPIOCSIPASS: 684 case PPPIOCSOPASS: 685 case PPPIOCSIACTIVE: 686 case PPPIOCSOACTIVE: 687 nbp = (struct bpf_program *) data; 688 if ((unsigned) nbp->bf_len > BPF_MAXINSNS) 689 return EINVAL; 690 newcodelen = nbp->bf_len * sizeof(struct bpf_insn); 691 if (newcodelen != 0) { 692 newcode = malloc(newcodelen, M_DEVBUF, M_WAITOK); 693 /* WAITOK -- malloc() never fails. */ 694 if ((error = copyin((caddr_t)nbp->bf_insns, (caddr_t)newcode, 695 newcodelen)) != 0) { 696 free(newcode, M_DEVBUF); 697 return error; 698 } 699 if (!bpf_validate(newcode, nbp->bf_len)) { 700 free(newcode, M_DEVBUF); 701 return EINVAL; 702 } 703 } else 704 newcode = 0; 705 switch (cmd) { 706 case PPPIOCSIPASS: 707 bp = &sc->sc_pass_filt_in; 708 break; 709 710 case PPPIOCSOPASS: 711 bp = &sc->sc_pass_filt_out; 712 break; 713 714 case PPPIOCSIACTIVE: 715 bp = &sc->sc_active_filt_in; 716 break; 717 718 case PPPIOCSOACTIVE: 719 bp = &sc->sc_active_filt_out; 720 break; 721 default: 722 free(newcode, M_DEVBUF); 723 return (EPASSTHROUGH); 724 } 725 oldcode = bp->bf_insns; 726 s = splnet(); 727 bp->bf_len = nbp->bf_len; 728 bp->bf_insns = newcode; 729 splx(s); 730 if (oldcode != 0) 731 free(oldcode, M_DEVBUF); 732 break; 733 #endif /* PPP_FILTER */ 734 735 default: 736 return (EPASSTHROUGH); 737 } 738 return (0); 739 } 740 741 /* 742 * Process an ioctl request to the ppp network interface. 743 */ 744 static int 745 pppsioctl(ifp, cmd, data) 746 struct ifnet *ifp; 747 u_long cmd; 748 caddr_t data; 749 { 750 struct proc *p = curproc; /* XXX */ 751 struct ppp_softc *sc = ifp->if_softc; 752 struct ifaddr *ifa = (struct ifaddr *)data; 753 struct ifreq *ifr = (struct ifreq *)data; 754 struct ppp_stats *psp; 755 #ifdef PPP_COMPRESS 756 struct ppp_comp_stats *pcp; 757 #endif 758 int s = splnet(), error = 0; 759 760 switch (cmd) { 761 case SIOCSIFFLAGS: 762 if ((ifp->if_flags & IFF_RUNNING) == 0) 763 ifp->if_flags &= ~IFF_UP; 764 break; 765 766 case SIOCSIFADDR: 767 switch (ifa->ifa_addr->sa_family) { 768 #ifdef INET 769 case AF_INET: 770 break; 771 #endif 772 #ifdef INET6 773 case AF_INET6: 774 break; 775 #endif 776 default: 777 error = EAFNOSUPPORT; 778 break; 779 } 780 break; 781 782 case SIOCSIFDSTADDR: 783 switch (ifa->ifa_addr->sa_family) { 784 #ifdef INET 785 case AF_INET: 786 break; 787 #endif 788 #ifdef INET6 789 case AF_INET6: 790 break; 791 #endif 792 default: 793 error = EAFNOSUPPORT; 794 break; 795 } 796 break; 797 798 case SIOCSIFMTU: 799 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 800 break; 801 sc->sc_if.if_mtu = ifr->ifr_mtu; 802 break; 803 804 case SIOCGIFMTU: 805 ifr->ifr_mtu = sc->sc_if.if_mtu; 806 break; 807 808 case SIOCADDMULTI: 809 case SIOCDELMULTI: 810 if (ifr == 0) { 811 error = EAFNOSUPPORT; 812 break; 813 } 814 switch (ifr->ifr_addr.sa_family) { 815 #ifdef INET 816 case AF_INET: 817 break; 818 #endif 819 #ifdef INET6 820 case AF_INET6: 821 break; 822 #endif 823 default: 824 error = EAFNOSUPPORT; 825 break; 826 } 827 break; 828 829 case SIOCGPPPSTATS: 830 psp = &((struct ifpppstatsreq *) data)->stats; 831 memset(psp, 0, sizeof(*psp)); 832 psp->p = sc->sc_stats; 833 #if defined(VJC) && !defined(SL_NO_STATS) 834 if (sc->sc_comp) { 835 psp->vj.vjs_packets = sc->sc_comp->sls_packets; 836 psp->vj.vjs_compressed = sc->sc_comp->sls_compressed; 837 psp->vj.vjs_searches = sc->sc_comp->sls_searches; 838 psp->vj.vjs_misses = sc->sc_comp->sls_misses; 839 psp->vj.vjs_uncompressedin = sc->sc_comp->sls_uncompressedin; 840 psp->vj.vjs_compressedin = sc->sc_comp->sls_compressedin; 841 psp->vj.vjs_errorin = sc->sc_comp->sls_errorin; 842 psp->vj.vjs_tossed = sc->sc_comp->sls_tossed; 843 } 844 #endif /* VJC */ 845 break; 846 847 #ifdef PPP_COMPRESS 848 case SIOCGPPPCSTATS: 849 pcp = &((struct ifpppcstatsreq *) data)->stats; 850 memset(pcp, 0, sizeof(*pcp)); 851 if (sc->sc_xc_state != NULL) 852 (*sc->sc_xcomp->comp_stat)(sc->sc_xc_state, &pcp->c); 853 if (sc->sc_rc_state != NULL) 854 (*sc->sc_rcomp->decomp_stat)(sc->sc_rc_state, &pcp->d); 855 break; 856 #endif /* PPP_COMPRESS */ 857 858 default: 859 error = EINVAL; 860 } 861 splx(s); 862 return (error); 863 } 864 865 /* 866 * Queue a packet. Start transmission if not active. 867 * Packet is placed in Information field of PPP frame. 868 */ 869 int 870 pppoutput(ifp, m0, dst, rtp) 871 struct ifnet *ifp; 872 struct mbuf *m0; 873 struct sockaddr *dst; 874 struct rtentry *rtp; 875 { 876 struct ppp_softc *sc = ifp->if_softc; 877 int protocol, address, control; 878 u_char *cp; 879 int s, error; 880 #ifdef INET 881 struct ip *ip; 882 #endif 883 struct ifqueue *ifq; 884 enum NPmode mode; 885 int len; 886 ALTQ_DECL(struct altq_pktattr pktattr;) 887 888 if (sc->sc_devp == NULL || (ifp->if_flags & IFF_RUNNING) == 0 889 || ((ifp->if_flags & IFF_UP) == 0 && dst->sa_family != AF_UNSPEC)) { 890 error = ENETDOWN; /* sort of */ 891 goto bad; 892 } 893 894 IFQ_CLASSIFY(&ifp->if_snd, m0, dst->sa_family, &pktattr); 895 896 /* 897 * Compute PPP header. 898 */ 899 m0->m_flags &= ~M_HIGHPRI; 900 switch (dst->sa_family) { 901 #ifdef INET 902 case AF_INET: 903 address = PPP_ALLSTATIONS; 904 control = PPP_UI; 905 protocol = PPP_IP; 906 mode = sc->sc_npmode[NP_IP]; 907 908 /* 909 * If this packet has the "low delay" bit set in the IP header, 910 * put it on the fastq instead. 911 */ 912 ip = mtod(m0, struct ip *); 913 if (ip->ip_tos & IPTOS_LOWDELAY) 914 m0->m_flags |= M_HIGHPRI; 915 break; 916 #endif 917 #ifdef INET6 918 case AF_INET6: 919 address = PPP_ALLSTATIONS; /*XXX*/ 920 control = PPP_UI; /*XXX*/ 921 protocol = PPP_IPV6; 922 mode = sc->sc_npmode[NP_IPV6]; 923 924 #if 0 /* XXX flowinfo/traffic class, maybe? */ 925 /* 926 * If this packet has the "low delay" bit set in the IP header, 927 * put it on the fastq instead. 928 */ 929 ip = mtod(m0, struct ip *); 930 if (ip->ip_tos & IPTOS_LOWDELAY) 931 m0->m_flags |= M_HIGHPRI; 932 #endif 933 break; 934 #endif 935 case AF_UNSPEC: 936 address = PPP_ADDRESS(dst->sa_data); 937 control = PPP_CONTROL(dst->sa_data); 938 protocol = PPP_PROTOCOL(dst->sa_data); 939 mode = NPMODE_PASS; 940 break; 941 default: 942 printf("%s: af%d not supported\n", ifp->if_xname, dst->sa_family); 943 error = EAFNOSUPPORT; 944 goto bad; 945 } 946 947 /* 948 * Drop this packet, or return an error, if necessary. 949 */ 950 if (mode == NPMODE_ERROR) { 951 error = ENETDOWN; 952 goto bad; 953 } 954 if (mode == NPMODE_DROP) { 955 error = 0; 956 goto bad; 957 } 958 959 /* 960 * Add PPP header. 961 */ 962 M_PREPEND(m0, PPP_HDRLEN, M_DONTWAIT); 963 if (m0 == NULL) { 964 error = ENOBUFS; 965 goto bad; 966 } 967 968 cp = mtod(m0, u_char *); 969 *cp++ = address; 970 *cp++ = control; 971 *cp++ = protocol >> 8; 972 *cp++ = protocol & 0xff; 973 974 len = m_length(m0); 975 976 if (sc->sc_flags & SC_LOG_OUTPKT) { 977 printf("%s output: ", ifp->if_xname); 978 pppdumpm(m0); 979 } 980 981 if ((protocol & 0x8000) == 0) { 982 #ifdef PPP_FILTER 983 /* 984 * Apply the pass and active filters to the packet, 985 * but only if it is a data packet. 986 */ 987 if (sc->sc_pass_filt_out.bf_insns != 0 988 && bpf_filter(sc->sc_pass_filt_out.bf_insns, (u_char *) m0, 989 len, 0) == 0) { 990 error = 0; /* drop this packet */ 991 goto bad; 992 } 993 994 /* 995 * Update the time we sent the most recent packet. 996 */ 997 if (sc->sc_active_filt_out.bf_insns == 0 998 || bpf_filter(sc->sc_active_filt_out.bf_insns, (u_char *) m0, 999 len, 0)) 1000 sc->sc_last_sent = time.tv_sec; 1001 #else 1002 /* 1003 * Update the time we sent the most recent packet. 1004 */ 1005 sc->sc_last_sent = time.tv_sec; 1006 #endif /* PPP_FILTER */ 1007 } 1008 1009 #if NBPFILTER > 0 1010 /* 1011 * See if bpf wants to look at the packet. 1012 */ 1013 if (sc->sc_if.if_bpf) 1014 bpf_mtap(sc->sc_if.if_bpf, m0); 1015 #endif 1016 1017 /* 1018 * Put the packet on the appropriate queue. 1019 */ 1020 s = splnet(); 1021 if (mode == NPMODE_QUEUE) { 1022 /* XXX we should limit the number of packets on this queue */ 1023 *sc->sc_npqtail = m0; 1024 m0->m_nextpkt = NULL; 1025 sc->sc_npqtail = &m0->m_nextpkt; 1026 } else { 1027 ifq = NULL; 1028 if (m0->m_flags & M_HIGHPRI) 1029 ifq = &sc->sc_fastq; 1030 if ((error = ifq_enqueue2(&sc->sc_if, ifq, m0 1031 ALTQ_COMMA ALTQ_DECL(&pktattr))) != 0) { 1032 splx(s); 1033 sc->sc_if.if_oerrors++; 1034 sc->sc_stats.ppp_oerrors++; 1035 return (error); 1036 } 1037 ppp_restart(sc); 1038 } 1039 ifp->if_opackets++; 1040 ifp->if_obytes += len; 1041 1042 splx(s); 1043 return (0); 1044 1045 bad: 1046 m_freem(m0); 1047 return (error); 1048 } 1049 1050 /* 1051 * After a change in the NPmode for some NP, move packets from the 1052 * npqueue to the send queue or the fast queue as appropriate. 1053 * Should be called at splnet, since we muck with the queues. 1054 */ 1055 static void 1056 ppp_requeue(sc) 1057 struct ppp_softc *sc; 1058 { 1059 struct mbuf *m, **mpp; 1060 struct ifqueue *ifq; 1061 enum NPmode mode; 1062 int error; 1063 1064 for (mpp = &sc->sc_npqueue; (m = *mpp) != NULL; ) { 1065 switch (PPP_PROTOCOL(mtod(m, u_char *))) { 1066 case PPP_IP: 1067 mode = sc->sc_npmode[NP_IP]; 1068 break; 1069 case PPP_IPV6: 1070 mode = sc->sc_npmode[NP_IPV6]; 1071 break; 1072 default: 1073 mode = NPMODE_PASS; 1074 } 1075 1076 switch (mode) { 1077 case NPMODE_PASS: 1078 /* 1079 * This packet can now go on one of the queues to be sent. 1080 */ 1081 *mpp = m->m_nextpkt; 1082 m->m_nextpkt = NULL; 1083 ifq = NULL; 1084 if (m->m_flags & M_HIGHPRI) 1085 ifq = &sc->sc_fastq; 1086 if ((error = ifq_enqueue2(&sc->sc_if, ifq, m ALTQ_COMMA 1087 ALTQ_DECL(NULL))) != 0) { 1088 sc->sc_if.if_oerrors++; 1089 sc->sc_stats.ppp_oerrors++; 1090 } 1091 break; 1092 1093 case NPMODE_DROP: 1094 case NPMODE_ERROR: 1095 *mpp = m->m_nextpkt; 1096 m_freem(m); 1097 break; 1098 1099 case NPMODE_QUEUE: 1100 mpp = &m->m_nextpkt; 1101 break; 1102 } 1103 } 1104 sc->sc_npqtail = mpp; 1105 } 1106 1107 /* 1108 * Transmitter has finished outputting some stuff; 1109 * remember to call sc->sc_start later at splsoftnet. 1110 */ 1111 void 1112 ppp_restart(sc) 1113 struct ppp_softc *sc; 1114 { 1115 int s = splhigh(); /* XXX IMP ME HARDER */ 1116 1117 sc->sc_flags &= ~SC_TBUSY; 1118 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1119 softintr_schedule(sc->sc_si); 1120 #else 1121 schednetisr(NETISR_PPP); 1122 #endif 1123 splx(s); 1124 } 1125 1126 /* 1127 * Get a packet to send. This procedure is intended to be called at 1128 * splsoftnet, since it may involve time-consuming operations such as 1129 * applying VJ compression, packet compression, address/control and/or 1130 * protocol field compression to the packet. 1131 */ 1132 struct mbuf * 1133 ppp_dequeue(sc) 1134 struct ppp_softc *sc; 1135 { 1136 struct mbuf *m, *mp; 1137 u_char *cp; 1138 int address, control, protocol; 1139 int s; 1140 1141 /* 1142 * Grab a packet to send: first try the fast queue, then the 1143 * normal queue. 1144 */ 1145 s = splnet(); 1146 IF_DEQUEUE(&sc->sc_fastq, m); 1147 if (m == NULL) 1148 IFQ_DEQUEUE(&sc->sc_if.if_snd, m); 1149 splx(s); 1150 1151 if (m == NULL) 1152 return NULL; 1153 1154 ++sc->sc_stats.ppp_opackets; 1155 1156 /* 1157 * Extract the ppp header of the new packet. 1158 * The ppp header will be in one mbuf. 1159 */ 1160 cp = mtod(m, u_char *); 1161 address = PPP_ADDRESS(cp); 1162 control = PPP_CONTROL(cp); 1163 protocol = PPP_PROTOCOL(cp); 1164 1165 switch (protocol) { 1166 case PPP_IP: 1167 #ifdef VJC 1168 /* 1169 * If the packet is a TCP/IP packet, see if we can compress it. 1170 */ 1171 if ((sc->sc_flags & SC_COMP_TCP) && sc->sc_comp != NULL) { 1172 struct ip *ip; 1173 int type; 1174 1175 mp = m; 1176 ip = (struct ip *) (cp + PPP_HDRLEN); 1177 if (mp->m_len <= PPP_HDRLEN) { 1178 mp = mp->m_next; 1179 if (mp == NULL) 1180 break; 1181 ip = mtod(mp, struct ip *); 1182 } 1183 /* this code assumes the IP/TCP header is in one non-shared mbuf */ 1184 if (ip->ip_p == IPPROTO_TCP) { 1185 type = sl_compress_tcp(mp, ip, sc->sc_comp, 1186 !(sc->sc_flags & SC_NO_TCP_CCID)); 1187 switch (type) { 1188 case TYPE_UNCOMPRESSED_TCP: 1189 protocol = PPP_VJC_UNCOMP; 1190 break; 1191 case TYPE_COMPRESSED_TCP: 1192 protocol = PPP_VJC_COMP; 1193 cp = mtod(m, u_char *); 1194 cp[0] = address; /* header has moved */ 1195 cp[1] = control; 1196 cp[2] = 0; 1197 break; 1198 } 1199 cp[3] = protocol; /* update protocol in PPP header */ 1200 } 1201 } 1202 #endif /* VJC */ 1203 break; 1204 1205 #ifdef PPP_COMPRESS 1206 case PPP_CCP: 1207 ppp_ccp(sc, m, 0); 1208 break; 1209 #endif /* PPP_COMPRESS */ 1210 } 1211 1212 #ifdef PPP_COMPRESS 1213 if (protocol != PPP_LCP && protocol != PPP_CCP 1214 && sc->sc_xc_state && (sc->sc_flags & SC_COMP_RUN)) { 1215 struct mbuf *mcomp = NULL; 1216 int slen; 1217 1218 slen = 0; 1219 for (mp = m; mp != NULL; mp = mp->m_next) 1220 slen += mp->m_len; 1221 (*sc->sc_xcomp->compress) 1222 (sc->sc_xc_state, &mcomp, m, slen, sc->sc_if.if_mtu + PPP_HDRLEN); 1223 if (mcomp != NULL) { 1224 if (sc->sc_flags & SC_CCP_UP) { 1225 /* Send the compressed packet instead of the original. */ 1226 m_freem(m); 1227 m = mcomp; 1228 cp = mtod(m, u_char *); 1229 protocol = cp[3]; 1230 } else { 1231 /* Can't transmit compressed packets until CCP is up. */ 1232 m_freem(mcomp); 1233 } 1234 } 1235 } 1236 #endif /* PPP_COMPRESS */ 1237 1238 /* 1239 * Compress the address/control and protocol, if possible. 1240 */ 1241 if (sc->sc_flags & SC_COMP_AC && address == PPP_ALLSTATIONS && 1242 control == PPP_UI && protocol != PPP_ALLSTATIONS && 1243 protocol != PPP_LCP) { 1244 /* can compress address/control */ 1245 m->m_data += 2; 1246 m->m_len -= 2; 1247 } 1248 if (sc->sc_flags & SC_COMP_PROT && protocol < 0xFF) { 1249 /* can compress protocol */ 1250 if (mtod(m, u_char *) == cp) { 1251 cp[2] = cp[1]; /* move address/control up */ 1252 cp[1] = cp[0]; 1253 } 1254 ++m->m_data; 1255 --m->m_len; 1256 } 1257 1258 return m; 1259 } 1260 1261 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1262 void 1263 pppnetisr(void) 1264 { 1265 struct ppp_softc *sc; 1266 1267 for (sc = LIST_FIRST(&ppp_softc_list); sc != NULL; 1268 sc = LIST_NEXT(sc, sc_iflist)) 1269 pppintr(sc); 1270 } 1271 #endif 1272 1273 /* 1274 * Software interrupt routine, called at splsoftnet. 1275 */ 1276 void 1277 pppintr(void *arg) 1278 { 1279 struct ppp_softc *sc = arg; 1280 struct mbuf *m; 1281 int s; 1282 1283 if (!(sc->sc_flags & SC_TBUSY) 1284 && (IFQ_IS_EMPTY(&sc->sc_if.if_snd) == 0 || sc->sc_fastq.ifq_head 1285 || sc->sc_outm)) { 1286 s = splhigh(); /* XXX IMP ME HARDER */ 1287 sc->sc_flags |= SC_TBUSY; 1288 splx(s); 1289 (*sc->sc_start)(sc); 1290 } 1291 for (;;) { 1292 s = splnet(); 1293 IF_DEQUEUE(&sc->sc_rawq, m); 1294 splx(s); 1295 if (m == NULL) 1296 break; 1297 ppp_inproc(sc, m); 1298 } 1299 } 1300 1301 #ifdef PPP_COMPRESS 1302 /* 1303 * Handle a CCP packet. `rcvd' is 1 if the packet was received, 1304 * 0 if it is about to be transmitted. 1305 */ 1306 static void 1307 ppp_ccp(sc, m, rcvd) 1308 struct ppp_softc *sc; 1309 struct mbuf *m; 1310 int rcvd; 1311 { 1312 u_char *dp, *ep; 1313 struct mbuf *mp; 1314 int slen, s; 1315 1316 /* 1317 * Get a pointer to the data after the PPP header. 1318 */ 1319 if (m->m_len <= PPP_HDRLEN) { 1320 mp = m->m_next; 1321 if (mp == NULL) 1322 return; 1323 dp = (mp != NULL)? mtod(mp, u_char *): NULL; 1324 } else { 1325 mp = m; 1326 dp = mtod(mp, u_char *) + PPP_HDRLEN; 1327 } 1328 1329 ep = mtod(mp, u_char *) + mp->m_len; 1330 if (dp + CCP_HDRLEN > ep) 1331 return; 1332 slen = CCP_LENGTH(dp); 1333 if (dp + slen > ep) { 1334 if (sc->sc_flags & SC_DEBUG) 1335 printf("if_ppp/ccp: not enough data in mbuf (%p+%x > %p+%x)\n", 1336 dp, slen, mtod(mp, u_char *), mp->m_len); 1337 return; 1338 } 1339 1340 switch (CCP_CODE(dp)) { 1341 case CCP_CONFREQ: 1342 case CCP_TERMREQ: 1343 case CCP_TERMACK: 1344 /* CCP must be going down - disable compression */ 1345 if (sc->sc_flags & SC_CCP_UP) { 1346 s = splhigh(); /* XXX IMP ME HARDER */ 1347 sc->sc_flags &= ~(SC_CCP_UP | SC_COMP_RUN | SC_DECOMP_RUN); 1348 splx(s); 1349 } 1350 break; 1351 1352 case CCP_CONFACK: 1353 if (sc->sc_flags & SC_CCP_OPEN && !(sc->sc_flags & SC_CCP_UP) 1354 && slen >= CCP_HDRLEN + CCP_OPT_MINLEN 1355 && slen >= CCP_OPT_LENGTH(dp + CCP_HDRLEN) + CCP_HDRLEN) { 1356 if (!rcvd) { 1357 /* we're agreeing to send compressed packets. */ 1358 if (sc->sc_xc_state != NULL 1359 && (*sc->sc_xcomp->comp_init) 1360 (sc->sc_xc_state, dp + CCP_HDRLEN, slen - CCP_HDRLEN, 1361 sc->sc_unit, 0, sc->sc_flags & SC_DEBUG)) { 1362 s = splhigh(); /* XXX IMP ME HARDER */ 1363 sc->sc_flags |= SC_COMP_RUN; 1364 splx(s); 1365 } 1366 } else { 1367 /* peer is agreeing to send compressed packets. */ 1368 if (sc->sc_rc_state != NULL 1369 && (*sc->sc_rcomp->decomp_init) 1370 (sc->sc_rc_state, dp + CCP_HDRLEN, slen - CCP_HDRLEN, 1371 sc->sc_unit, 0, sc->sc_mru, 1372 sc->sc_flags & SC_DEBUG)) { 1373 s = splhigh(); /* XXX IMP ME HARDER */ 1374 sc->sc_flags |= SC_DECOMP_RUN; 1375 sc->sc_flags &= ~(SC_DC_ERROR | SC_DC_FERROR); 1376 splx(s); 1377 } 1378 } 1379 } 1380 break; 1381 1382 case CCP_RESETACK: 1383 if (sc->sc_flags & SC_CCP_UP) { 1384 if (!rcvd) { 1385 if (sc->sc_xc_state && (sc->sc_flags & SC_COMP_RUN)) 1386 (*sc->sc_xcomp->comp_reset)(sc->sc_xc_state); 1387 } else { 1388 if (sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN)) { 1389 (*sc->sc_rcomp->decomp_reset)(sc->sc_rc_state); 1390 s = splhigh(); /* XXX IMP ME HARDER */ 1391 sc->sc_flags &= ~SC_DC_ERROR; 1392 splx(s); 1393 } 1394 } 1395 } 1396 break; 1397 } 1398 } 1399 1400 /* 1401 * CCP is down; free (de)compressor state if necessary. 1402 */ 1403 static void 1404 ppp_ccp_closed(sc) 1405 struct ppp_softc *sc; 1406 { 1407 if (sc->sc_xc_state) { 1408 (*sc->sc_xcomp->comp_free)(sc->sc_xc_state); 1409 sc->sc_xc_state = NULL; 1410 } 1411 if (sc->sc_rc_state) { 1412 (*sc->sc_rcomp->decomp_free)(sc->sc_rc_state); 1413 sc->sc_rc_state = NULL; 1414 } 1415 } 1416 #endif /* PPP_COMPRESS */ 1417 1418 /* 1419 * PPP packet input routine. 1420 * The caller has checked and removed the FCS and has inserted 1421 * the address/control bytes and the protocol high byte if they 1422 * were omitted. 1423 */ 1424 void 1425 ppppktin(sc, m, lost) 1426 struct ppp_softc *sc; 1427 struct mbuf *m; 1428 int lost; 1429 { 1430 int s = splhigh(); /* XXX IMP ME HARDER */ 1431 1432 if (lost) 1433 m->m_flags |= M_ERRMARK; 1434 IF_ENQUEUE(&sc->sc_rawq, m); 1435 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1436 softintr_schedule(sc->sc_si); 1437 #else 1438 schednetisr(NETISR_PPP); 1439 #endif 1440 splx(s); 1441 } 1442 1443 /* 1444 * Process a received PPP packet, doing decompression as necessary. 1445 * Should be called at splsoftnet. 1446 */ 1447 #define COMPTYPE(proto) ((proto) == PPP_VJC_COMP? TYPE_COMPRESSED_TCP: \ 1448 TYPE_UNCOMPRESSED_TCP) 1449 1450 static void 1451 ppp_inproc(sc, m) 1452 struct ppp_softc *sc; 1453 struct mbuf *m; 1454 { 1455 struct ifnet *ifp = &sc->sc_if; 1456 struct ifqueue *inq; 1457 int s, ilen, proto, rv; 1458 u_char *cp, adrs, ctrl; 1459 struct mbuf *mp, *dmp = NULL; 1460 #ifdef VJC 1461 int xlen; 1462 u_char *iphdr; 1463 u_int hlen; 1464 #endif 1465 1466 sc->sc_stats.ppp_ipackets++; 1467 1468 if (sc->sc_flags & SC_LOG_INPKT) { 1469 ilen = 0; 1470 for (mp = m; mp != NULL; mp = mp->m_next) 1471 ilen += mp->m_len; 1472 printf("%s: got %d bytes\n", ifp->if_xname, ilen); 1473 pppdumpm(m); 1474 } 1475 1476 cp = mtod(m, u_char *); 1477 adrs = PPP_ADDRESS(cp); 1478 ctrl = PPP_CONTROL(cp); 1479 proto = PPP_PROTOCOL(cp); 1480 1481 if (m->m_flags & M_ERRMARK) { 1482 m->m_flags &= ~M_ERRMARK; 1483 s = splhigh(); /* XXX IMP ME HARDER */ 1484 sc->sc_flags |= SC_VJ_RESET; 1485 splx(s); 1486 } 1487 1488 #ifdef PPP_COMPRESS 1489 /* 1490 * Decompress this packet if necessary, update the receiver's 1491 * dictionary, or take appropriate action on a CCP packet. 1492 */ 1493 if (proto == PPP_COMP && sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN) 1494 && !(sc->sc_flags & SC_DC_ERROR) && !(sc->sc_flags & SC_DC_FERROR)) { 1495 /* decompress this packet */ 1496 rv = (*sc->sc_rcomp->decompress)(sc->sc_rc_state, m, &dmp); 1497 if (rv == DECOMP_OK) { 1498 m_freem(m); 1499 if (dmp == NULL) { 1500 /* no error, but no decompressed packet produced */ 1501 return; 1502 } 1503 m = dmp; 1504 cp = mtod(m, u_char *); 1505 proto = PPP_PROTOCOL(cp); 1506 1507 } else { 1508 /* 1509 * An error has occurred in decompression. 1510 * Pass the compressed packet up to pppd, which may take 1511 * CCP down or issue a Reset-Req. 1512 */ 1513 if (sc->sc_flags & SC_DEBUG) 1514 printf("%s: decompress failed %d\n", ifp->if_xname, rv); 1515 s = splhigh(); /* XXX IMP ME HARDER */ 1516 sc->sc_flags |= SC_VJ_RESET; 1517 if (rv == DECOMP_ERROR) 1518 sc->sc_flags |= SC_DC_ERROR; 1519 else 1520 sc->sc_flags |= SC_DC_FERROR; 1521 splx(s); 1522 } 1523 1524 } else { 1525 if (sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN)) { 1526 (*sc->sc_rcomp->incomp)(sc->sc_rc_state, m); 1527 } 1528 if (proto == PPP_CCP) { 1529 ppp_ccp(sc, m, 1); 1530 } 1531 } 1532 #endif 1533 1534 ilen = 0; 1535 for (mp = m; mp != NULL; mp = mp->m_next) 1536 ilen += mp->m_len; 1537 1538 #ifdef VJC 1539 if (sc->sc_flags & SC_VJ_RESET) { 1540 /* 1541 * If we've missed a packet, we must toss subsequent compressed 1542 * packets which don't have an explicit connection ID. 1543 */ 1544 if (sc->sc_comp) 1545 sl_uncompress_tcp(NULL, 0, TYPE_ERROR, sc->sc_comp); 1546 s = splhigh(); /* XXX IMP ME HARDER */ 1547 sc->sc_flags &= ~SC_VJ_RESET; 1548 splx(s); 1549 } 1550 1551 /* 1552 * See if we have a VJ-compressed packet to uncompress. 1553 */ 1554 if (proto == PPP_VJC_COMP) { 1555 if ((sc->sc_flags & SC_REJ_COMP_TCP) || sc->sc_comp == 0) 1556 goto bad; 1557 1558 xlen = sl_uncompress_tcp_core(cp + PPP_HDRLEN, m->m_len - PPP_HDRLEN, 1559 ilen - PPP_HDRLEN, TYPE_COMPRESSED_TCP, 1560 sc->sc_comp, &iphdr, &hlen); 1561 1562 if (xlen <= 0) { 1563 if (sc->sc_flags & SC_DEBUG) 1564 printf("%s: VJ uncompress failed on type comp\n", 1565 ifp->if_xname); 1566 goto bad; 1567 } 1568 1569 /* Copy the PPP and IP headers into a new mbuf. */ 1570 MGETHDR(mp, M_DONTWAIT, MT_DATA); 1571 if (mp == NULL) 1572 goto bad; 1573 mp->m_len = 0; 1574 mp->m_next = NULL; 1575 if (hlen + PPP_HDRLEN > MHLEN) { 1576 MCLGET(mp, M_DONTWAIT); 1577 if (M_TRAILINGSPACE(mp) < hlen + PPP_HDRLEN) { 1578 m_freem(mp); 1579 goto bad; /* lose if big headers and no clusters */ 1580 } 1581 } 1582 cp = mtod(mp, u_char *); 1583 cp[0] = adrs; 1584 cp[1] = ctrl; 1585 cp[2] = 0; 1586 cp[3] = PPP_IP; 1587 proto = PPP_IP; 1588 bcopy(iphdr, cp + PPP_HDRLEN, hlen); 1589 mp->m_len = hlen + PPP_HDRLEN; 1590 1591 /* 1592 * Trim the PPP and VJ headers off the old mbuf 1593 * and stick the new and old mbufs together. 1594 */ 1595 m->m_data += PPP_HDRLEN + xlen; 1596 m->m_len -= PPP_HDRLEN + xlen; 1597 if (m->m_len <= M_TRAILINGSPACE(mp)) { 1598 bcopy(mtod(m, u_char *), mtod(mp, u_char *) + mp->m_len, m->m_len); 1599 mp->m_len += m->m_len; 1600 MFREE(m, mp->m_next); 1601 } else 1602 mp->m_next = m; 1603 m = mp; 1604 ilen += hlen - xlen; 1605 1606 } else if (proto == PPP_VJC_UNCOMP) { 1607 if ((sc->sc_flags & SC_REJ_COMP_TCP) || sc->sc_comp == 0) 1608 goto bad; 1609 1610 xlen = sl_uncompress_tcp_core(cp + PPP_HDRLEN, m->m_len - PPP_HDRLEN, 1611 ilen - PPP_HDRLEN, TYPE_UNCOMPRESSED_TCP, 1612 sc->sc_comp, &iphdr, &hlen); 1613 1614 if (xlen < 0) { 1615 if (sc->sc_flags & SC_DEBUG) 1616 printf("%s: VJ uncompress failed on type uncomp\n", 1617 ifp->if_xname); 1618 goto bad; 1619 } 1620 1621 proto = PPP_IP; 1622 cp[3] = PPP_IP; 1623 } 1624 #endif /* VJC */ 1625 1626 /* 1627 * If the packet will fit in a header mbuf, don't waste a 1628 * whole cluster on it. 1629 */ 1630 if (ilen <= MHLEN && M_IS_CLUSTER(m)) { 1631 MGETHDR(mp, M_DONTWAIT, MT_DATA); 1632 if (mp != NULL) { 1633 m_copydata(m, 0, ilen, mtod(mp, caddr_t)); 1634 m_freem(m); 1635 m = mp; 1636 m->m_len = ilen; 1637 } 1638 } 1639 m->m_pkthdr.len = ilen; 1640 m->m_pkthdr.rcvif = ifp; 1641 1642 if ((proto & 0x8000) == 0) { 1643 #ifdef PPP_FILTER 1644 /* 1645 * See whether we want to pass this packet, and 1646 * if it counts as link activity. 1647 */ 1648 if (sc->sc_pass_filt_in.bf_insns != 0 1649 && bpf_filter(sc->sc_pass_filt_in.bf_insns, (u_char *) m, 1650 ilen, 0) == 0) { 1651 /* drop this packet */ 1652 m_freem(m); 1653 return; 1654 } 1655 if (sc->sc_active_filt_in.bf_insns == 0 1656 || bpf_filter(sc->sc_active_filt_in.bf_insns, (u_char *) m, 1657 ilen, 0)) 1658 sc->sc_last_recv = time.tv_sec; 1659 #else 1660 /* 1661 * Record the time that we received this packet. 1662 */ 1663 sc->sc_last_recv = time.tv_sec; 1664 #endif /* PPP_FILTER */ 1665 } 1666 1667 #if NBPFILTER > 0 1668 /* See if bpf wants to look at the packet. */ 1669 if (sc->sc_if.if_bpf) 1670 bpf_mtap(sc->sc_if.if_bpf, m); 1671 #endif 1672 1673 rv = 0; 1674 switch (proto) { 1675 #ifdef INET 1676 case PPP_IP: 1677 /* 1678 * IP packet - take off the ppp header and pass it up to IP. 1679 */ 1680 if ((ifp->if_flags & IFF_UP) == 0 1681 || sc->sc_npmode[NP_IP] != NPMODE_PASS) { 1682 /* interface is down - drop the packet. */ 1683 m_freem(m); 1684 return; 1685 } 1686 m->m_pkthdr.len -= PPP_HDRLEN; 1687 m->m_data += PPP_HDRLEN; 1688 m->m_len -= PPP_HDRLEN; 1689 #ifdef GATEWAY 1690 if (ipflow_fastforward(m)) 1691 return; 1692 #endif 1693 schednetisr(NETISR_IP); 1694 inq = &ipintrq; 1695 break; 1696 #endif 1697 1698 #ifdef INET6 1699 case PPP_IPV6: 1700 /* 1701 * IPv6 packet - take off the ppp header and pass it up to IPv6. 1702 */ 1703 if ((ifp->if_flags & IFF_UP) == 0 1704 || sc->sc_npmode[NP_IPV6] != NPMODE_PASS) { 1705 /* interface is down - drop the packet. */ 1706 m_freem(m); 1707 return; 1708 } 1709 m->m_pkthdr.len -= PPP_HDRLEN; 1710 m->m_data += PPP_HDRLEN; 1711 m->m_len -= PPP_HDRLEN; 1712 schednetisr(NETISR_IPV6); 1713 inq = &ip6intrq; 1714 break; 1715 #endif 1716 1717 default: 1718 /* 1719 * Some other protocol - place on input queue for read(). 1720 */ 1721 inq = &sc->sc_inq; 1722 rv = 1; 1723 break; 1724 } 1725 1726 /* 1727 * Put the packet on the appropriate input queue. 1728 */ 1729 s = splnet(); 1730 if (IF_QFULL(inq)) { 1731 IF_DROP(inq); 1732 splx(s); 1733 if (sc->sc_flags & SC_DEBUG) 1734 printf("%s: input queue full\n", ifp->if_xname); 1735 ifp->if_iqdrops++; 1736 goto bad; 1737 } 1738 IF_ENQUEUE(inq, m); 1739 splx(s); 1740 ifp->if_ipackets++; 1741 ifp->if_ibytes += ilen; 1742 1743 if (rv) 1744 (*sc->sc_ctlp)(sc); 1745 1746 return; 1747 1748 bad: 1749 m_freem(m); 1750 sc->sc_if.if_ierrors++; 1751 sc->sc_stats.ppp_ierrors++; 1752 } 1753 1754 #define MAX_DUMP_BYTES 128 1755 1756 static void 1757 pppdumpm(m0) 1758 struct mbuf *m0; 1759 { 1760 char buf[3*MAX_DUMP_BYTES+4]; 1761 char *bp = buf; 1762 struct mbuf *m; 1763 static char digits[] = "0123456789abcdef"; 1764 1765 for (m = m0; m; m = m->m_next) { 1766 int l = m->m_len; 1767 u_char *rptr = (u_char *)m->m_data; 1768 1769 while (l--) { 1770 if (bp > buf + sizeof(buf) - 4) 1771 goto done; 1772 *bp++ = digits[*rptr >> 4]; /* convert byte to ascii hex */ 1773 *bp++ = digits[*rptr++ & 0xf]; 1774 } 1775 1776 if (m->m_next) { 1777 if (bp > buf + sizeof(buf) - 3) 1778 goto done; 1779 *bp++ = '|'; 1780 } else 1781 *bp++ = ' '; 1782 } 1783 done: 1784 if (m) 1785 *bp++ = '>'; 1786 *bp = 0; 1787 printf("%s\n", buf); 1788 } 1789 1790 #ifdef ALTQ 1791 /* 1792 * a wrapper to transmit a packet from if_start since ALTQ uses 1793 * if_start to send a packet. 1794 */ 1795 static void 1796 ppp_ifstart(ifp) 1797 struct ifnet *ifp; 1798 { 1799 struct ppp_softc *sc; 1800 1801 sc = ifp->if_softc; 1802 (*sc->sc_start)(sc); 1803 } 1804 #endif 1805
Indexes created Fri Oct 03 02:09:57 GMT 2025