if_ppp.c revision 1.114.2.3
1 /* $NetBSD: if_ppp.c,v 1.114.2.3 2007/07/15 13:27:53 ad 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 1.114.2.3 2007/07/15 13:27:53 ad 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 #include <sys/conf.h> 128 #include <sys/kauth.h> 129 #include <sys/intr.h> 130 131 #include <net/if.h> 132 #include <net/if_types.h> 133 #include <net/netisr.h> 134 #include <net/route.h> 135 #ifdef PPP_FILTER 136 #include <net/bpf.h> 137 #endif 138 139 #include <netinet/in.h> 140 #include <netinet/in_systm.h> 141 #include <netinet/in_var.h> 142 #ifdef INET 143 #include <netinet/ip.h> 144 #endif 145 146 #include "bpfilter.h" 147 #if NBPFILTER > 0 148 #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(struct ifnet *, u_long, void *); 170 static void ppp_requeue(struct ppp_softc *); 171 static void ppp_ccp(struct ppp_softc *, struct mbuf *m, int rcvd); 172 static void ppp_ccp_closed(struct ppp_softc *); 173 static void ppp_inproc(struct ppp_softc *, struct mbuf *); 174 static void pppdumpm(struct mbuf *m0); 175 #ifdef ALTQ 176 static void ppp_ifstart(struct ifnet *ifp); 177 #endif 178 179 static void pppintr(void *); 180 181 /* 182 * Some useful mbuf macros not in mbuf.h. 183 */ 184 #define M_IS_CLUSTER(m) ((m)->m_flags & M_EXT) 185 186 #define M_DATASTART(m) \ 187 (M_IS_CLUSTER(m) ? (m)->m_ext.ext_buf : \ 188 (m)->m_flags & M_PKTHDR ? (m)->m_pktdat : (m)->m_dat) 189 190 #define M_DATASIZE(m) \ 191 (M_IS_CLUSTER(m) ? (m)->m_ext.ext_size : \ 192 (m)->m_flags & M_PKTHDR ? MHLEN: MLEN) 193 194 /* 195 * We define two link layer specific mbuf flags, to mark high-priority 196 * packets for output, and received packets following lost/corrupted 197 * packets. 198 */ 199 #define M_HIGHPRI M_LINK0 /* output packet for sc_fastq */ 200 #define M_ERRMARK M_LINK1 /* rx packet following lost/corrupted pkt */ 201 202 static int ppp_clone_create(struct if_clone *, int); 203 static int ppp_clone_destroy(struct ifnet *); 204 205 static struct ppp_softc *ppp_create(const char *, int); 206 207 static LIST_HEAD(, ppp_softc) ppp_softc_list; 208 209 struct if_clone ppp_cloner = 210 IF_CLONE_INITIALIZER("ppp", ppp_clone_create, ppp_clone_destroy); 211 212 static struct simplelock ppp_list_mutex = SIMPLELOCK_INITIALIZER; 213 214 #ifdef PPP_COMPRESS 215 /* 216 * List of compressors we know about. 217 * We leave some space so maybe we can modload compressors. 218 */ 219 220 extern struct compressor ppp_bsd_compress; 221 extern struct compressor ppp_deflate, ppp_deflate_draft; 222 223 struct compressor *ppp_compressors[PPP_COMPRESSORS_MAX] = { 224 #if DO_BSD_COMPRESS && defined(PPP_BSDCOMP) 225 &ppp_bsd_compress, 226 #endif 227 #if DO_DEFLATE && defined(PPP_DEFLATE) 228 &ppp_deflate, 229 &ppp_deflate_draft, 230 #endif 231 NULL 232 }; 233 #endif /* PPP_COMPRESS */ 234 235 236 /* 237 * Called from boot code to establish ppp interfaces. 238 */ 239 void 240 pppattach(void) 241 { 242 extern struct linesw ppp_disc; 243 244 if (ttyldisc_attach(&ppp_disc) != 0) 245 panic("pppattach"); 246 LIST_INIT(&ppp_softc_list); 247 if_clone_attach(&ppp_cloner); 248 } 249 250 static struct ppp_softc * 251 ppp_create(const char *name, int unit) 252 { 253 struct ppp_softc *sc, *sci, *scl = NULL; 254 255 MALLOC(sc, struct ppp_softc *, sizeof(*sc), M_DEVBUF, M_WAIT|M_ZERO); 256 257 simple_lock(&ppp_list_mutex); 258 if (unit == -1) { 259 int i = 0; 260 LIST_FOREACH(sci, &ppp_softc_list, sc_iflist) { 261 scl = sci; 262 if (i < sci->sc_unit) { 263 unit = i; 264 break; 265 } else { 266 #ifdef DIAGNOSTIC 267 KASSERT(i == sci->sc_unit); 268 #endif 269 i++; 270 } 271 } 272 if (unit == -1) 273 unit = i; 274 } else { 275 LIST_FOREACH(sci, &ppp_softc_list, sc_iflist) { 276 scl = sci; 277 if (unit < sci->sc_unit) 278 break; 279 else if (unit == sci->sc_unit) { 280 FREE(sc, M_DEVBUF); 281 return NULL; 282 } 283 } 284 } 285 286 if (sci != NULL) 287 LIST_INSERT_BEFORE(sci, sc, sc_iflist); 288 else if (scl != NULL) 289 LIST_INSERT_AFTER(scl, sc, sc_iflist); 290 else 291 LIST_INSERT_HEAD(&ppp_softc_list, sc, sc_iflist); 292 293 simple_unlock(&ppp_list_mutex); 294 295 (void)snprintf(sc->sc_if.if_xname, sizeof(sc->sc_if.if_xname), "%s%d", 296 name, sc->sc_unit = unit); 297 callout_init(&sc->sc_timo_ch, 0); 298 sc->sc_if.if_softc = sc; 299 sc->sc_if.if_mtu = PPP_MTU; 300 sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST; 301 sc->sc_if.if_type = IFT_PPP; 302 sc->sc_if.if_hdrlen = PPP_HDRLEN; 303 sc->sc_if.if_dlt = DLT_NULL; 304 sc->sc_if.if_ioctl = pppsioctl; 305 sc->sc_if.if_output = pppoutput; 306 #ifdef ALTQ 307 sc->sc_if.if_start = ppp_ifstart; 308 #endif 309 IFQ_SET_MAXLEN(&sc->sc_if.if_snd, IFQ_MAXLEN); 310 sc->sc_inq.ifq_maxlen = IFQ_MAXLEN; 311 sc->sc_fastq.ifq_maxlen = IFQ_MAXLEN; 312 sc->sc_rawq.ifq_maxlen = IFQ_MAXLEN; 313 /* Ratio of 1:2 packets between the regular and the fast queue */ 314 sc->sc_maxfastq = 2; 315 IFQ_SET_READY(&sc->sc_if.if_snd); 316 if_attach(&sc->sc_if); 317 if_alloc_sadl(&sc->sc_if); 318 #if NBPFILTER > 0 319 bpfattach(&sc->sc_if, DLT_NULL, 0); 320 #endif 321 return sc; 322 } 323 324 static int 325 ppp_clone_create(struct if_clone *ifc, int unit) 326 { 327 return ppp_create(ifc->ifc_name, unit) == NULL ? EEXIST : 0; 328 } 329 330 static int 331 ppp_clone_destroy(struct ifnet *ifp) 332 { 333 struct ppp_softc *sc = (struct ppp_softc *)ifp->if_softc; 334 335 if (sc->sc_devp != NULL) 336 return EBUSY; /* Not removing it */ 337 338 simple_lock(&ppp_list_mutex); 339 LIST_REMOVE(sc, sc_iflist); 340 simple_unlock(&ppp_list_mutex); 341 342 #if NBPFILTER > 0 343 bpfdetach(ifp); 344 #endif 345 if_detach(ifp); 346 347 FREE(sc, M_DEVBUF); 348 return 0; 349 } 350 351 /* 352 * Allocate a ppp interface unit and initialize it. 353 */ 354 struct ppp_softc * 355 pppalloc(pid_t pid) 356 { 357 struct ppp_softc *sc = NULL, *scf; 358 int i; 359 360 simple_lock(&ppp_list_mutex); 361 for (scf = LIST_FIRST(&ppp_softc_list); scf != NULL; 362 scf = LIST_NEXT(scf, sc_iflist)) { 363 if (scf->sc_xfer == pid) { 364 scf->sc_xfer = 0; 365 simple_unlock(&ppp_list_mutex); 366 return scf; 367 } 368 if (scf->sc_devp == NULL && sc == NULL) 369 sc = scf; 370 } 371 simple_unlock(&ppp_list_mutex); 372 373 if (sc == NULL) 374 sc = ppp_create(ppp_cloner.ifc_name, -1); 375 376 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 377 sc->sc_si = softint_establish(SOFTINT_NET, pppintr, sc); 378 if (sc->sc_si == NULL) { 379 printf("%s: unable to establish softintr\n", sc->sc_if.if_xname); 380 return (NULL); 381 } 382 #endif 383 sc->sc_flags = 0; 384 sc->sc_mru = PPP_MRU; 385 sc->sc_relinq = NULL; 386 (void)memset(&sc->sc_stats, 0, sizeof(sc->sc_stats)); 387 #ifdef VJC 388 MALLOC(sc->sc_comp, struct slcompress *, sizeof(struct slcompress), 389 M_DEVBUF, M_NOWAIT); 390 if (sc->sc_comp) 391 sl_compress_init(sc->sc_comp); 392 #endif 393 #ifdef PPP_COMPRESS 394 sc->sc_xc_state = NULL; 395 sc->sc_rc_state = NULL; 396 #endif /* PPP_COMPRESS */ 397 for (i = 0; i < NUM_NP; ++i) 398 sc->sc_npmode[i] = NPMODE_ERROR; 399 sc->sc_npqueue = NULL; 400 sc->sc_npqtail = &sc->sc_npqueue; 401 sc->sc_last_sent = sc->sc_last_recv = time_second; 402 403 return sc; 404 } 405 406 /* 407 * Deallocate a ppp unit. Must be called at splsoftnet or higher. 408 */ 409 void 410 pppdealloc(struct ppp_softc *sc) 411 { 412 struct mbuf *m; 413 414 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 415 softint_disestablish(sc->sc_si); 416 #endif 417 if_down(&sc->sc_if); 418 sc->sc_if.if_flags &= ~(IFF_UP|IFF_RUNNING); 419 sc->sc_devp = NULL; 420 sc->sc_xfer = 0; 421 for (;;) { 422 IF_DEQUEUE(&sc->sc_rawq, m); 423 if (m == NULL) 424 break; 425 m_freem(m); 426 } 427 for (;;) { 428 IF_DEQUEUE(&sc->sc_inq, m); 429 if (m == NULL) 430 break; 431 m_freem(m); 432 } 433 for (;;) { 434 IF_DEQUEUE(&sc->sc_fastq, m); 435 if (m == NULL) 436 break; 437 m_freem(m); 438 } 439 while ((m = sc->sc_npqueue) != NULL) { 440 sc->sc_npqueue = m->m_nextpkt; 441 m_freem(m); 442 } 443 if (sc->sc_togo != NULL) { 444 m_freem(sc->sc_togo); 445 sc->sc_togo = NULL; 446 } 447 #ifdef PPP_COMPRESS 448 ppp_ccp_closed(sc); 449 sc->sc_xc_state = NULL; 450 sc->sc_rc_state = NULL; 451 #endif /* PPP_COMPRESS */ 452 #ifdef PPP_FILTER 453 if (sc->sc_pass_filt_in.bf_insns != 0) { 454 FREE(sc->sc_pass_filt_in.bf_insns, M_DEVBUF); 455 sc->sc_pass_filt_in.bf_insns = 0; 456 sc->sc_pass_filt_in.bf_len = 0; 457 } 458 if (sc->sc_pass_filt_out.bf_insns != 0) { 459 FREE(sc->sc_pass_filt_out.bf_insns, M_DEVBUF); 460 sc->sc_pass_filt_out.bf_insns = 0; 461 sc->sc_pass_filt_out.bf_len = 0; 462 } 463 if (sc->sc_active_filt_in.bf_insns != 0) { 464 FREE(sc->sc_active_filt_in.bf_insns, M_DEVBUF); 465 sc->sc_active_filt_in.bf_insns = 0; 466 sc->sc_active_filt_in.bf_len = 0; 467 } 468 if (sc->sc_active_filt_out.bf_insns != 0) { 469 FREE(sc->sc_active_filt_out.bf_insns, M_DEVBUF); 470 sc->sc_active_filt_out.bf_insns = 0; 471 sc->sc_active_filt_out.bf_len = 0; 472 } 473 #endif /* PPP_FILTER */ 474 #ifdef VJC 475 if (sc->sc_comp != 0) { 476 FREE(sc->sc_comp, M_DEVBUF); 477 sc->sc_comp = 0; 478 } 479 #endif 480 (void)ppp_clone_destroy(&sc->sc_if); 481 } 482 483 /* 484 * Ioctl routine for generic ppp devices. 485 */ 486 int 487 pppioctl(struct ppp_softc *sc, u_long cmd, void *data, int flag, 488 struct lwp *l) 489 { 490 int s, error, flags, mru, npx; 491 u_int nb; 492 struct ppp_option_data *odp; 493 struct compressor **cp; 494 struct npioctl *npi; 495 time_t t; 496 #ifdef PPP_FILTER 497 struct bpf_program *bp, *nbp; 498 struct bpf_insn *newcode, *oldcode; 499 int newcodelen; 500 #endif /* PPP_FILTER */ 501 #ifdef PPP_COMPRESS 502 u_char ccp_option[CCP_MAX_OPTION_LENGTH]; 503 #endif 504 505 switch (cmd) { 506 case PPPIOCSFLAGS: 507 case PPPIOCSMRU: 508 case PPPIOCSMAXCID: 509 case PPPIOCSCOMPRESS: 510 case PPPIOCSNPMODE: 511 if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_INTERFACE, 512 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, &sc->sc_if, (void *)cmd, 513 NULL) != 0) 514 return (EPERM); 515 break; 516 case PPPIOCXFERUNIT: 517 /* XXX: Why is this privileged?! */ 518 if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_INTERFACE, 519 KAUTH_REQ_NETWORK_INTERFACE_GETPRIV, &sc->sc_if, (void *)cmd, 520 NULL) != 0) 521 return (EPERM); 522 break; 523 default: 524 break; 525 } 526 527 switch (cmd) { 528 case FIONREAD: 529 *(int *)data = sc->sc_inq.ifq_len; 530 break; 531 532 case PPPIOCGUNIT: 533 *(int *)data = sc->sc_unit; 534 break; 535 536 case PPPIOCGFLAGS: 537 *(u_int *)data = sc->sc_flags; 538 break; 539 540 case PPPIOCGRAWIN: 541 { 542 struct ppp_rawin *rwin = (struct ppp_rawin *)data; 543 u_char c, q = 0; 544 545 for (c = sc->sc_rawin_start; c < sizeof(sc->sc_rawin.buf);) 546 rwin->buf[q++] = sc->sc_rawin.buf[c++]; 547 548 for (c = 0; c < sc->sc_rawin_start;) 549 rwin->buf[q++] = sc->sc_rawin.buf[c++]; 550 551 rwin->count = sc->sc_rawin.count; 552 } 553 break; 554 555 case PPPIOCSFLAGS: 556 flags = *(int *)data & SC_MASK; 557 s = splsoftnet(); 558 #ifdef PPP_COMPRESS 559 if (sc->sc_flags & SC_CCP_OPEN && !(flags & SC_CCP_OPEN)) 560 ppp_ccp_closed(sc); 561 #endif 562 splhigh(); /* XXX IMP ME HARDER */ 563 sc->sc_flags = (sc->sc_flags & ~SC_MASK) | flags; 564 splx(s); 565 break; 566 567 case PPPIOCSMRU: 568 mru = *(int *)data; 569 if (mru >= PPP_MINMRU && mru <= PPP_MAXMRU) 570 sc->sc_mru = mru; 571 break; 572 573 case PPPIOCGMRU: 574 *(int *)data = sc->sc_mru; 575 break; 576 577 #ifdef VJC 578 case PPPIOCSMAXCID: 579 if (sc->sc_comp) { 580 s = splsoftnet(); 581 sl_compress_setup(sc->sc_comp, *(int *)data); 582 splx(s); 583 } 584 break; 585 #endif 586 587 case PPPIOCXFERUNIT: 588 sc->sc_xfer = l->l_proc->p_pid; 589 break; 590 591 #ifdef PPP_COMPRESS 592 case PPPIOCSCOMPRESS: 593 odp = (struct ppp_option_data *) data; 594 nb = odp->length; 595 if (nb > sizeof(ccp_option)) 596 nb = sizeof(ccp_option); 597 if ((error = copyin(odp->ptr, ccp_option, nb)) != 0) 598 return (error); 599 if (ccp_option[1] < 2) /* preliminary check on the length byte */ 600 return (EINVAL); 601 for (cp = ppp_compressors; *cp != NULL; ++cp) 602 if ((*cp)->compress_proto == ccp_option[0]) { 603 /* 604 * Found a handler for the protocol - try to allocate 605 * a compressor or decompressor. 606 */ 607 error = 0; 608 if (odp->transmit) { 609 s = splsoftnet(); 610 if (sc->sc_xc_state != NULL) 611 (*sc->sc_xcomp->comp_free)(sc->sc_xc_state); 612 sc->sc_xcomp = *cp; 613 sc->sc_xc_state = (*cp)->comp_alloc(ccp_option, nb); 614 if (sc->sc_xc_state == NULL) { 615 if (sc->sc_flags & SC_DEBUG) 616 printf("%s: comp_alloc failed\n", 617 sc->sc_if.if_xname); 618 error = ENOBUFS; 619 } 620 splhigh(); /* XXX IMP ME HARDER */ 621 sc->sc_flags &= ~SC_COMP_RUN; 622 splx(s); 623 } else { 624 s = splsoftnet(); 625 if (sc->sc_rc_state != NULL) 626 (*sc->sc_rcomp->decomp_free)(sc->sc_rc_state); 627 sc->sc_rcomp = *cp; 628 sc->sc_rc_state = (*cp)->decomp_alloc(ccp_option, nb); 629 if (sc->sc_rc_state == NULL) { 630 if (sc->sc_flags & SC_DEBUG) 631 printf("%s: decomp_alloc failed\n", 632 sc->sc_if.if_xname); 633 error = ENOBUFS; 634 } 635 splhigh(); /* XXX IMP ME HARDER */ 636 sc->sc_flags &= ~SC_DECOMP_RUN; 637 splx(s); 638 } 639 return (error); 640 } 641 if (sc->sc_flags & SC_DEBUG) 642 printf("%s: no compressor for [%x %x %x], %x\n", 643 sc->sc_if.if_xname, ccp_option[0], ccp_option[1], 644 ccp_option[2], nb); 645 return (EINVAL); /* no handler found */ 646 #endif /* PPP_COMPRESS */ 647 648 case PPPIOCGNPMODE: 649 case PPPIOCSNPMODE: 650 npi = (struct npioctl *) data; 651 switch (npi->protocol) { 652 case PPP_IP: 653 npx = NP_IP; 654 break; 655 case PPP_IPV6: 656 npx = NP_IPV6; 657 break; 658 default: 659 return EINVAL; 660 } 661 if (cmd == PPPIOCGNPMODE) { 662 npi->mode = sc->sc_npmode[npx]; 663 } else { 664 if (npi->mode != sc->sc_npmode[npx]) { 665 s = splnet(); 666 sc->sc_npmode[npx] = npi->mode; 667 if (npi->mode != NPMODE_QUEUE) { 668 ppp_requeue(sc); 669 ppp_restart(sc); 670 } 671 splx(s); 672 } 673 } 674 break; 675 676 case PPPIOCGIDLE: 677 s = splsoftnet(); 678 t = time_second; 679 ((struct ppp_idle *)data)->xmit_idle = t - sc->sc_last_sent; 680 ((struct ppp_idle *)data)->recv_idle = t - sc->sc_last_recv; 681 splx(s); 682 break; 683 684 #ifdef PPP_FILTER 685 case PPPIOCSPASS: 686 case PPPIOCSACTIVE: 687 /* These are no longer supported. */ 688 return EOPNOTSUPP; 689 690 case PPPIOCSIPASS: 691 case PPPIOCSOPASS: 692 case PPPIOCSIACTIVE: 693 case PPPIOCSOACTIVE: 694 nbp = (struct bpf_program *) data; 695 if ((unsigned) nbp->bf_len > BPF_MAXINSNS) 696 return EINVAL; 697 newcodelen = nbp->bf_len * sizeof(struct bpf_insn); 698 if (newcodelen != 0) { 699 newcode = malloc(newcodelen, M_DEVBUF, M_WAITOK); 700 /* WAITOK -- malloc() never fails. */ 701 if ((error = copyin((void *)nbp->bf_insns, (void *)newcode, 702 newcodelen)) != 0) { 703 free(newcode, M_DEVBUF); 704 return error; 705 } 706 if (!bpf_validate(newcode, nbp->bf_len)) { 707 free(newcode, M_DEVBUF); 708 return EINVAL; 709 } 710 } else 711 newcode = 0; 712 switch (cmd) { 713 case PPPIOCSIPASS: 714 bp = &sc->sc_pass_filt_in; 715 break; 716 717 case PPPIOCSOPASS: 718 bp = &sc->sc_pass_filt_out; 719 break; 720 721 case PPPIOCSIACTIVE: 722 bp = &sc->sc_active_filt_in; 723 break; 724 725 case PPPIOCSOACTIVE: 726 bp = &sc->sc_active_filt_out; 727 break; 728 default: 729 free(newcode, M_DEVBUF); 730 return (EPASSTHROUGH); 731 } 732 oldcode = bp->bf_insns; 733 s = splnet(); 734 bp->bf_len = nbp->bf_len; 735 bp->bf_insns = newcode; 736 splx(s); 737 if (oldcode != 0) 738 free(oldcode, M_DEVBUF); 739 break; 740 #endif /* PPP_FILTER */ 741 742 default: 743 return (EPASSTHROUGH); 744 } 745 return (0); 746 } 747 748 /* 749 * Process an ioctl request to the ppp network interface. 750 */ 751 static int 752 pppsioctl(struct ifnet *ifp, u_long cmd, void *data) 753 { 754 struct lwp *l = curlwp; /* XXX */ 755 struct ppp_softc *sc = ifp->if_softc; 756 struct ifaddr *ifa = (struct ifaddr *)data; 757 struct ifreq *ifr = (struct ifreq *)data; 758 struct ppp_stats *psp; 759 #ifdef PPP_COMPRESS 760 struct ppp_comp_stats *pcp; 761 #endif 762 int s = splnet(), error = 0; 763 764 switch (cmd) { 765 case SIOCSIFFLAGS: 766 if ((ifp->if_flags & IFF_RUNNING) == 0) 767 ifp->if_flags &= ~IFF_UP; 768 break; 769 770 case SIOCSIFADDR: 771 switch (ifa->ifa_addr->sa_family) { 772 #ifdef INET 773 case AF_INET: 774 break; 775 #endif 776 #ifdef INET6 777 case AF_INET6: 778 break; 779 #endif 780 default: 781 error = EAFNOSUPPORT; 782 break; 783 } 784 break; 785 786 case SIOCSIFDSTADDR: 787 switch (ifa->ifa_addr->sa_family) { 788 #ifdef INET 789 case AF_INET: 790 break; 791 #endif 792 #ifdef INET6 793 case AF_INET6: 794 break; 795 #endif 796 default: 797 error = EAFNOSUPPORT; 798 break; 799 } 800 break; 801 802 case SIOCSIFMTU: 803 if ((error = kauth_authorize_network(l->l_cred, 804 KAUTH_NETWORK_INTERFACE, KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, 805 ifp, (void *)cmd, NULL) != 0)) 806 break; 807 sc->sc_if.if_mtu = ifr->ifr_mtu; 808 break; 809 810 case SIOCGIFMTU: 811 ifr->ifr_mtu = sc->sc_if.if_mtu; 812 break; 813 814 case SIOCADDMULTI: 815 case SIOCDELMULTI: 816 if (ifr == 0) { 817 error = EAFNOSUPPORT; 818 break; 819 } 820 switch (ifr->ifr_addr.sa_family) { 821 #ifdef INET 822 case AF_INET: 823 break; 824 #endif 825 #ifdef INET6 826 case AF_INET6: 827 break; 828 #endif 829 default: 830 error = EAFNOSUPPORT; 831 break; 832 } 833 break; 834 835 case SIOCGPPPSTATS: 836 psp = &((struct ifpppstatsreq *) data)->stats; 837 memset(psp, 0, sizeof(*psp)); 838 psp->p = sc->sc_stats; 839 #if defined(VJC) && !defined(SL_NO_STATS) 840 if (sc->sc_comp) { 841 psp->vj.vjs_packets = sc->sc_comp->sls_packets; 842 psp->vj.vjs_compressed = sc->sc_comp->sls_compressed; 843 psp->vj.vjs_searches = sc->sc_comp->sls_searches; 844 psp->vj.vjs_misses = sc->sc_comp->sls_misses; 845 psp->vj.vjs_uncompressedin = sc->sc_comp->sls_uncompressedin; 846 psp->vj.vjs_compressedin = sc->sc_comp->sls_compressedin; 847 psp->vj.vjs_errorin = sc->sc_comp->sls_errorin; 848 psp->vj.vjs_tossed = sc->sc_comp->sls_tossed; 849 } 850 #endif /* VJC */ 851 break; 852 853 #ifdef PPP_COMPRESS 854 case SIOCGPPPCSTATS: 855 pcp = &((struct ifpppcstatsreq *) data)->stats; 856 memset(pcp, 0, sizeof(*pcp)); 857 if (sc->sc_xc_state != NULL) 858 (*sc->sc_xcomp->comp_stat)(sc->sc_xc_state, &pcp->c); 859 if (sc->sc_rc_state != NULL) 860 (*sc->sc_rcomp->decomp_stat)(sc->sc_rc_state, &pcp->d); 861 break; 862 #endif /* PPP_COMPRESS */ 863 864 default: 865 error = EINVAL; 866 } 867 splx(s); 868 return (error); 869 } 870 871 /* 872 * Queue a packet. Start transmission if not active. 873 * Packet is placed in Information field of PPP frame. 874 */ 875 int 876 pppoutput(struct ifnet *ifp, struct mbuf *m0, const struct sockaddr *dst, 877 struct rtentry *rtp) 878 { 879 struct ppp_softc *sc = ifp->if_softc; 880 int protocol, address, control; 881 u_char *cp; 882 int s, error; 883 #ifdef INET 884 struct ip *ip; 885 #endif 886 struct ifqueue *ifq; 887 enum NPmode mode; 888 int len; 889 ALTQ_DECL(struct altq_pktattr pktattr;) 890 891 if (sc->sc_devp == NULL || (ifp->if_flags & IFF_RUNNING) == 0 892 || ((ifp->if_flags & IFF_UP) == 0 && dst->sa_family != AF_UNSPEC)) { 893 error = ENETDOWN; /* sort of */ 894 goto bad; 895 } 896 897 IFQ_CLASSIFY(&ifp->if_snd, m0, dst->sa_family, &pktattr); 898 899 /* 900 * Compute PPP header. 901 */ 902 m0->m_flags &= ~M_HIGHPRI; 903 switch (dst->sa_family) { 904 #ifdef INET 905 case AF_INET: 906 address = PPP_ALLSTATIONS; 907 control = PPP_UI; 908 protocol = PPP_IP; 909 mode = sc->sc_npmode[NP_IP]; 910 911 /* 912 * If this packet has the "low delay" bit set in the IP header, 913 * put it on the fastq instead. 914 */ 915 ip = mtod(m0, struct ip *); 916 if (ip->ip_tos & IPTOS_LOWDELAY) 917 m0->m_flags |= M_HIGHPRI; 918 break; 919 #endif 920 #ifdef INET6 921 case AF_INET6: 922 address = PPP_ALLSTATIONS; /*XXX*/ 923 control = PPP_UI; /*XXX*/ 924 protocol = PPP_IPV6; 925 mode = sc->sc_npmode[NP_IPV6]; 926 927 #if 0 /* XXX flowinfo/traffic class, maybe? */ 928 /* 929 * If this packet has the "low delay" bit set in the IP header, 930 * put it on the fastq instead. 931 */ 932 ip = mtod(m0, struct ip *); 933 if (ip->ip_tos & IPTOS_LOWDELAY) 934 m0->m_flags |= M_HIGHPRI; 935 #endif 936 break; 937 #endif 938 case AF_UNSPEC: 939 address = PPP_ADDRESS(dst->sa_data); 940 control = PPP_CONTROL(dst->sa_data); 941 protocol = PPP_PROTOCOL(dst->sa_data); 942 mode = NPMODE_PASS; 943 break; 944 default: 945 printf("%s: af%d not supported\n", ifp->if_xname, dst->sa_family); 946 error = EAFNOSUPPORT; 947 goto bad; 948 } 949 950 /* 951 * Drop this packet, or return an error, if necessary. 952 */ 953 if (mode == NPMODE_ERROR) { 954 error = ENETDOWN; 955 goto bad; 956 } 957 if (mode == NPMODE_DROP) { 958 error = 0; 959 goto bad; 960 } 961 962 /* 963 * Add PPP header. 964 */ 965 M_PREPEND(m0, PPP_HDRLEN, M_DONTWAIT); 966 if (m0 == NULL) { 967 error = ENOBUFS; 968 goto bad; 969 } 970 971 cp = mtod(m0, u_char *); 972 *cp++ = address; 973 *cp++ = control; 974 *cp++ = protocol >> 8; 975 *cp++ = protocol & 0xff; 976 977 len = m_length(m0); 978 979 if (sc->sc_flags & SC_LOG_OUTPKT) { 980 printf("%s output: ", ifp->if_xname); 981 pppdumpm(m0); 982 } 983 984 if ((protocol & 0x8000) == 0) { 985 #ifdef PPP_FILTER 986 /* 987 * Apply the pass and active filters to the packet, 988 * but only if it is a data packet. 989 */ 990 if (sc->sc_pass_filt_out.bf_insns != 0 991 && bpf_filter(sc->sc_pass_filt_out.bf_insns, (u_char *) m0, 992 len, 0) == 0) { 993 error = 0; /* drop this packet */ 994 goto bad; 995 } 996 997 /* 998 * Update the time we sent the most recent packet. 999 */ 1000 if (sc->sc_active_filt_out.bf_insns == 0 1001 || bpf_filter(sc->sc_active_filt_out.bf_insns, (u_char *) m0, 1002 len, 0)) 1003 sc->sc_last_sent = time_second; 1004 #else 1005 /* 1006 * Update the time we sent the most recent packet. 1007 */ 1008 sc->sc_last_sent = time_second; 1009 #endif /* PPP_FILTER */ 1010 } 1011 1012 #if NBPFILTER > 0 1013 /* 1014 * See if bpf wants to look at the packet. 1015 */ 1016 if (sc->sc_if.if_bpf) 1017 bpf_mtap(sc->sc_if.if_bpf, m0); 1018 #endif 1019 1020 /* 1021 * Put the packet on the appropriate queue. 1022 */ 1023 s = splnet(); 1024 if (mode == NPMODE_QUEUE) { 1025 /* XXX we should limit the number of packets on this queue */ 1026 *sc->sc_npqtail = m0; 1027 m0->m_nextpkt = NULL; 1028 sc->sc_npqtail = &m0->m_nextpkt; 1029 } else { 1030 ifq = (m0->m_flags & M_HIGHPRI) ? &sc->sc_fastq : NULL; 1031 if ((error = ifq_enqueue2(&sc->sc_if, ifq, m0 1032 ALTQ_COMMA ALTQ_DECL(&pktattr))) != 0) { 1033 splx(s); 1034 sc->sc_if.if_oerrors++; 1035 sc->sc_stats.ppp_oerrors++; 1036 return (error); 1037 } 1038 ppp_restart(sc); 1039 } 1040 ifp->if_opackets++; 1041 ifp->if_obytes += len; 1042 1043 splx(s); 1044 return (0); 1045 1046 bad: 1047 m_freem(m0); 1048 return (error); 1049 } 1050 1051 /* 1052 * After a change in the NPmode for some NP, move packets from the 1053 * npqueue to the send queue or the fast queue as appropriate. 1054 * Should be called at splnet, since we muck with the queues. 1055 */ 1056 static void 1057 ppp_requeue(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 = (m->m_flags & M_HIGHPRI) ? &sc->sc_fastq : NULL; 1084 if ((error = ifq_enqueue2(&sc->sc_if, ifq, m ALTQ_COMMA 1085 ALTQ_DECL(NULL))) != 0) { 1086 sc->sc_if.if_oerrors++; 1087 sc->sc_stats.ppp_oerrors++; 1088 } 1089 break; 1090 1091 case NPMODE_DROP: 1092 case NPMODE_ERROR: 1093 *mpp = m->m_nextpkt; 1094 m_freem(m); 1095 break; 1096 1097 case NPMODE_QUEUE: 1098 mpp = &m->m_nextpkt; 1099 break; 1100 } 1101 } 1102 sc->sc_npqtail = mpp; 1103 } 1104 1105 /* 1106 * Transmitter has finished outputting some stuff; 1107 * remember to call sc->sc_start later at splsoftnet. 1108 */ 1109 void 1110 ppp_restart(struct ppp_softc *sc) 1111 { 1112 int s = splhigh(); /* XXX IMP ME HARDER */ 1113 1114 sc->sc_flags &= ~SC_TBUSY; 1115 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1116 softint_schedule(sc->sc_si); 1117 #else 1118 schednetisr(NETISR_PPP); 1119 #endif 1120 splx(s); 1121 } 1122 1123 /* 1124 * Get a packet to send. This procedure is intended to be called at 1125 * splsoftnet, since it may involve time-consuming operations such as 1126 * applying VJ compression, packet compression, address/control and/or 1127 * protocol field compression to the packet. 1128 */ 1129 struct mbuf * 1130 ppp_dequeue(struct ppp_softc *sc) 1131 { 1132 struct mbuf *m, *mp; 1133 u_char *cp; 1134 int address, control, protocol; 1135 int s; 1136 1137 /* 1138 * Grab a packet to send: first try the fast queue, then the 1139 * normal queue. 1140 */ 1141 s = splnet(); 1142 if (sc->sc_nfastq < sc->sc_maxfastq) { 1143 IF_DEQUEUE(&sc->sc_fastq, m); 1144 if (m != NULL) 1145 sc->sc_nfastq++; 1146 else 1147 IFQ_DEQUEUE(&sc->sc_if.if_snd, m); 1148 } else { 1149 sc->sc_nfastq = 0; 1150 IFQ_DEQUEUE(&sc->sc_if.if_snd, m); 1151 if (m == NULL) { 1152 IF_DEQUEUE(&sc->sc_fastq, m); 1153 if (m != NULL) 1154 sc->sc_nfastq++; 1155 } 1156 } 1157 splx(s); 1158 1159 if (m == NULL) 1160 return NULL; 1161 1162 ++sc->sc_stats.ppp_opackets; 1163 1164 /* 1165 * Extract the ppp header of the new packet. 1166 * The ppp header will be in one mbuf. 1167 */ 1168 cp = mtod(m, u_char *); 1169 address = PPP_ADDRESS(cp); 1170 control = PPP_CONTROL(cp); 1171 protocol = PPP_PROTOCOL(cp); 1172 1173 switch (protocol) { 1174 case PPP_IP: 1175 #ifdef VJC 1176 /* 1177 * If the packet is a TCP/IP packet, see if we can compress it. 1178 */ 1179 if ((sc->sc_flags & SC_COMP_TCP) && sc->sc_comp != NULL) { 1180 struct ip *ip; 1181 int type; 1182 1183 mp = m; 1184 ip = (struct ip *) (cp + PPP_HDRLEN); 1185 if (mp->m_len <= PPP_HDRLEN) { 1186 mp = mp->m_next; 1187 if (mp == NULL) 1188 break; 1189 ip = mtod(mp, struct ip *); 1190 } 1191 /* this code assumes the IP/TCP header is in one non-shared mbuf */ 1192 if (ip->ip_p == IPPROTO_TCP) { 1193 type = sl_compress_tcp(mp, ip, sc->sc_comp, 1194 !(sc->sc_flags & SC_NO_TCP_CCID)); 1195 switch (type) { 1196 case TYPE_UNCOMPRESSED_TCP: 1197 protocol = PPP_VJC_UNCOMP; 1198 break; 1199 case TYPE_COMPRESSED_TCP: 1200 protocol = PPP_VJC_COMP; 1201 cp = mtod(m, u_char *); 1202 cp[0] = address; /* header has moved */ 1203 cp[1] = control; 1204 cp[2] = 0; 1205 break; 1206 } 1207 cp[3] = protocol; /* update protocol in PPP header */ 1208 } 1209 } 1210 #endif /* VJC */ 1211 break; 1212 1213 #ifdef PPP_COMPRESS 1214 case PPP_CCP: 1215 ppp_ccp(sc, m, 0); 1216 break; 1217 #endif /* PPP_COMPRESS */ 1218 } 1219 1220 #ifdef PPP_COMPRESS 1221 if (protocol != PPP_LCP && protocol != PPP_CCP 1222 && sc->sc_xc_state && (sc->sc_flags & SC_COMP_RUN)) { 1223 struct mbuf *mcomp = NULL; 1224 int slen; 1225 1226 slen = 0; 1227 for (mp = m; mp != NULL; mp = mp->m_next) 1228 slen += mp->m_len; 1229 (*sc->sc_xcomp->compress) 1230 (sc->sc_xc_state, &mcomp, m, slen, sc->sc_if.if_mtu + PPP_HDRLEN); 1231 if (mcomp != NULL) { 1232 if (sc->sc_flags & SC_CCP_UP) { 1233 /* Send the compressed packet instead of the original. */ 1234 m_freem(m); 1235 m = mcomp; 1236 cp = mtod(m, u_char *); 1237 protocol = cp[3]; 1238 } else { 1239 /* Can't transmit compressed packets until CCP is up. */ 1240 m_freem(mcomp); 1241 } 1242 } 1243 } 1244 #endif /* PPP_COMPRESS */ 1245 1246 /* 1247 * Compress the address/control and protocol, if possible. 1248 */ 1249 if (sc->sc_flags & SC_COMP_AC && address == PPP_ALLSTATIONS && 1250 control == PPP_UI && protocol != PPP_ALLSTATIONS && 1251 protocol != PPP_LCP) { 1252 /* can compress address/control */ 1253 m->m_data += 2; 1254 m->m_len -= 2; 1255 } 1256 if (sc->sc_flags & SC_COMP_PROT && protocol < 0xFF) { 1257 /* can compress protocol */ 1258 if (mtod(m, u_char *) == cp) { 1259 cp[2] = cp[1]; /* move address/control up */ 1260 cp[1] = cp[0]; 1261 } 1262 ++m->m_data; 1263 --m->m_len; 1264 } 1265 1266 return m; 1267 } 1268 1269 /* 1270 * Software interrupt routine, called at splsoftnet. 1271 */ 1272 static void 1273 pppintr(void *arg) 1274 { 1275 struct ppp_softc *sc = arg; 1276 struct mbuf *m; 1277 int s; 1278 1279 if (!(sc->sc_flags & SC_TBUSY) 1280 && (IFQ_IS_EMPTY(&sc->sc_if.if_snd) == 0 || sc->sc_fastq.ifq_head 1281 || sc->sc_outm)) { 1282 s = splhigh(); /* XXX IMP ME HARDER */ 1283 sc->sc_flags |= SC_TBUSY; 1284 splx(s); 1285 (*sc->sc_start)(sc); 1286 } 1287 for (;;) { 1288 s = splnet(); 1289 IF_DEQUEUE(&sc->sc_rawq, m); 1290 splx(s); 1291 if (m == NULL) 1292 break; 1293 ppp_inproc(sc, m); 1294 } 1295 } 1296 1297 #ifdef PPP_COMPRESS 1298 /* 1299 * Handle a CCP packet. `rcvd' is 1 if the packet was received, 1300 * 0 if it is about to be transmitted. 1301 */ 1302 static void 1303 ppp_ccp(struct ppp_softc *sc, struct mbuf *m, int rcvd) 1304 { 1305 u_char *dp, *ep; 1306 struct mbuf *mp; 1307 int slen, s; 1308 1309 /* 1310 * Get a pointer to the data after the PPP header. 1311 */ 1312 if (m->m_len <= PPP_HDRLEN) { 1313 mp = m->m_next; 1314 if (mp == NULL) 1315 return; 1316 dp = (mp != NULL)? mtod(mp, u_char *): NULL; 1317 } else { 1318 mp = m; 1319 dp = mtod(mp, u_char *) + PPP_HDRLEN; 1320 } 1321 1322 ep = mtod(mp, u_char *) + mp->m_len; 1323 if (dp + CCP_HDRLEN > ep) 1324 return; 1325 slen = CCP_LENGTH(dp); 1326 if (dp + slen > ep) { 1327 if (sc->sc_flags & SC_DEBUG) 1328 printf("if_ppp/ccp: not enough data in mbuf (%p+%x > %p+%x)\n", 1329 dp, slen, mtod(mp, u_char *), mp->m_len); 1330 return; 1331 } 1332 1333 switch (CCP_CODE(dp)) { 1334 case CCP_CONFREQ: 1335 case CCP_TERMREQ: 1336 case CCP_TERMACK: 1337 /* CCP must be going down - disable compression */ 1338 if (sc->sc_flags & SC_CCP_UP) { 1339 s = splhigh(); /* XXX IMP ME HARDER */ 1340 sc->sc_flags &= ~(SC_CCP_UP | SC_COMP_RUN | SC_DECOMP_RUN); 1341 splx(s); 1342 } 1343 break; 1344 1345 case CCP_CONFACK: 1346 if (sc->sc_flags & SC_CCP_OPEN && !(sc->sc_flags & SC_CCP_UP) 1347 && slen >= CCP_HDRLEN + CCP_OPT_MINLEN 1348 && slen >= CCP_OPT_LENGTH(dp + CCP_HDRLEN) + CCP_HDRLEN) { 1349 if (!rcvd) { 1350 /* we're agreeing to send compressed packets. */ 1351 if (sc->sc_xc_state != NULL 1352 && (*sc->sc_xcomp->comp_init) 1353 (sc->sc_xc_state, dp + CCP_HDRLEN, slen - CCP_HDRLEN, 1354 sc->sc_unit, 0, sc->sc_flags & SC_DEBUG)) { 1355 s = splhigh(); /* XXX IMP ME HARDER */ 1356 sc->sc_flags |= SC_COMP_RUN; 1357 splx(s); 1358 } 1359 } else { 1360 /* peer is agreeing to send compressed packets. */ 1361 if (sc->sc_rc_state != NULL 1362 && (*sc->sc_rcomp->decomp_init) 1363 (sc->sc_rc_state, dp + CCP_HDRLEN, slen - CCP_HDRLEN, 1364 sc->sc_unit, 0, sc->sc_mru, 1365 sc->sc_flags & SC_DEBUG)) { 1366 s = splhigh(); /* XXX IMP ME HARDER */ 1367 sc->sc_flags |= SC_DECOMP_RUN; 1368 sc->sc_flags &= ~(SC_DC_ERROR | SC_DC_FERROR); 1369 splx(s); 1370 } 1371 } 1372 } 1373 break; 1374 1375 case CCP_RESETACK: 1376 if (sc->sc_flags & SC_CCP_UP) { 1377 if (!rcvd) { 1378 if (sc->sc_xc_state && (sc->sc_flags & SC_COMP_RUN)) 1379 (*sc->sc_xcomp->comp_reset)(sc->sc_xc_state); 1380 } else { 1381 if (sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN)) { 1382 (*sc->sc_rcomp->decomp_reset)(sc->sc_rc_state); 1383 s = splhigh(); /* XXX IMP ME HARDER */ 1384 sc->sc_flags &= ~SC_DC_ERROR; 1385 splx(s); 1386 } 1387 } 1388 } 1389 break; 1390 } 1391 } 1392 1393 /* 1394 * CCP is down; free (de)compressor state if necessary. 1395 */ 1396 static void 1397 ppp_ccp_closed(struct ppp_softc *sc) 1398 { 1399 if (sc->sc_xc_state) { 1400 (*sc->sc_xcomp->comp_free)(sc->sc_xc_state); 1401 sc->sc_xc_state = NULL; 1402 } 1403 if (sc->sc_rc_state) { 1404 (*sc->sc_rcomp->decomp_free)(sc->sc_rc_state); 1405 sc->sc_rc_state = NULL; 1406 } 1407 } 1408 #endif /* PPP_COMPRESS */ 1409 1410 /* 1411 * PPP packet input routine. 1412 * The caller has checked and removed the FCS and has inserted 1413 * the address/control bytes and the protocol high byte if they 1414 * were omitted. 1415 */ 1416 void 1417 ppppktin(struct ppp_softc *sc, struct mbuf *m, int lost) 1418 { 1419 int s = splhigh(); /* XXX IMP ME HARDER */ 1420 1421 if (lost) 1422 m->m_flags |= M_ERRMARK; 1423 IF_ENQUEUE(&sc->sc_rawq, m); 1424 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1425 softint_schedule(sc->sc_si); 1426 #else 1427 schednetisr(NETISR_PPP); 1428 #endif 1429 splx(s); 1430 } 1431 1432 /* 1433 * Process a received PPP packet, doing decompression as necessary. 1434 * Should be called at splsoftnet. 1435 */ 1436 #define COMPTYPE(proto) ((proto) == PPP_VJC_COMP? TYPE_COMPRESSED_TCP: \ 1437 TYPE_UNCOMPRESSED_TCP) 1438 1439 static void 1440 ppp_inproc(struct ppp_softc *sc, struct mbuf *m) 1441 { 1442 struct ifnet *ifp = &sc->sc_if; 1443 struct ifqueue *inq; 1444 int s, ilen, proto, rv; 1445 u_char *cp, adrs, ctrl; 1446 struct mbuf *mp, *dmp = NULL; 1447 #ifdef VJC 1448 int xlen; 1449 u_char *iphdr; 1450 u_int hlen; 1451 #endif 1452 1453 sc->sc_stats.ppp_ipackets++; 1454 1455 if (sc->sc_flags & SC_LOG_INPKT) { 1456 ilen = 0; 1457 for (mp = m; mp != NULL; mp = mp->m_next) 1458 ilen += mp->m_len; 1459 printf("%s: got %d bytes\n", ifp->if_xname, ilen); 1460 pppdumpm(m); 1461 } 1462 1463 cp = mtod(m, u_char *); 1464 adrs = PPP_ADDRESS(cp); 1465 ctrl = PPP_CONTROL(cp); 1466 proto = PPP_PROTOCOL(cp); 1467 1468 if (m->m_flags & M_ERRMARK) { 1469 m->m_flags &= ~M_ERRMARK; 1470 s = splhigh(); /* XXX IMP ME HARDER */ 1471 sc->sc_flags |= SC_VJ_RESET; 1472 splx(s); 1473 } 1474 1475 #ifdef PPP_COMPRESS 1476 /* 1477 * Decompress this packet if necessary, update the receiver's 1478 * dictionary, or take appropriate action on a CCP packet. 1479 */ 1480 if (proto == PPP_COMP && sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN) 1481 && !(sc->sc_flags & SC_DC_ERROR) && !(sc->sc_flags & SC_DC_FERROR)) { 1482 /* decompress this packet */ 1483 rv = (*sc->sc_rcomp->decompress)(sc->sc_rc_state, m, &dmp); 1484 if (rv == DECOMP_OK) { 1485 m_freem(m); 1486 if (dmp == NULL) { 1487 /* no error, but no decompressed packet produced */ 1488 return; 1489 } 1490 m = dmp; 1491 cp = mtod(m, u_char *); 1492 proto = PPP_PROTOCOL(cp); 1493 1494 } else { 1495 /* 1496 * An error has occurred in decompression. 1497 * Pass the compressed packet up to pppd, which may take 1498 * CCP down or issue a Reset-Req. 1499 */ 1500 if (sc->sc_flags & SC_DEBUG) 1501 printf("%s: decompress failed %d\n", ifp->if_xname, rv); 1502 s = splhigh(); /* XXX IMP ME HARDER */ 1503 sc->sc_flags |= SC_VJ_RESET; 1504 if (rv == DECOMP_ERROR) 1505 sc->sc_flags |= SC_DC_ERROR; 1506 else 1507 sc->sc_flags |= SC_DC_FERROR; 1508 splx(s); 1509 } 1510 1511 } else { 1512 if (sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN)) { 1513 (*sc->sc_rcomp->incomp)(sc->sc_rc_state, m); 1514 } 1515 if (proto == PPP_CCP) { 1516 ppp_ccp(sc, m, 1); 1517 } 1518 } 1519 #endif 1520 1521 ilen = 0; 1522 for (mp = m; mp != NULL; mp = mp->m_next) 1523 ilen += mp->m_len; 1524 1525 #ifdef VJC 1526 if (sc->sc_flags & SC_VJ_RESET) { 1527 /* 1528 * If we've missed a packet, we must toss subsequent compressed 1529 * packets which don't have an explicit connection ID. 1530 */ 1531 if (sc->sc_comp) 1532 sl_uncompress_tcp(NULL, 0, TYPE_ERROR, sc->sc_comp); 1533 s = splhigh(); /* XXX IMP ME HARDER */ 1534 sc->sc_flags &= ~SC_VJ_RESET; 1535 splx(s); 1536 } 1537 1538 /* 1539 * See if we have a VJ-compressed packet to uncompress. 1540 */ 1541 if (proto == PPP_VJC_COMP) { 1542 if ((sc->sc_flags & SC_REJ_COMP_TCP) || sc->sc_comp == 0) 1543 goto bad; 1544 1545 xlen = sl_uncompress_tcp_core(cp + PPP_HDRLEN, m->m_len - PPP_HDRLEN, 1546 ilen - PPP_HDRLEN, TYPE_COMPRESSED_TCP, 1547 sc->sc_comp, &iphdr, &hlen); 1548 1549 if (xlen <= 0) { 1550 if (sc->sc_flags & SC_DEBUG) 1551 printf("%s: VJ uncompress failed on type comp\n", 1552 ifp->if_xname); 1553 goto bad; 1554 } 1555 1556 /* Copy the PPP and IP headers into a new mbuf. */ 1557 MGETHDR(mp, M_DONTWAIT, MT_DATA); 1558 if (mp == NULL) 1559 goto bad; 1560 mp->m_len = 0; 1561 mp->m_next = NULL; 1562 if (hlen + PPP_HDRLEN > MHLEN) { 1563 MCLGET(mp, M_DONTWAIT); 1564 if (M_TRAILINGSPACE(mp) < hlen + PPP_HDRLEN) { 1565 m_freem(mp); 1566 goto bad; /* lose if big headers and no clusters */ 1567 } 1568 } 1569 cp = mtod(mp, u_char *); 1570 cp[0] = adrs; 1571 cp[1] = ctrl; 1572 cp[2] = 0; 1573 cp[3] = PPP_IP; 1574 proto = PPP_IP; 1575 bcopy(iphdr, cp + PPP_HDRLEN, hlen); 1576 mp->m_len = hlen + PPP_HDRLEN; 1577 1578 /* 1579 * Trim the PPP and VJ headers off the old mbuf 1580 * and stick the new and old mbufs together. 1581 */ 1582 m->m_data += PPP_HDRLEN + xlen; 1583 m->m_len -= PPP_HDRLEN + xlen; 1584 if (m->m_len <= M_TRAILINGSPACE(mp)) { 1585 bcopy(mtod(m, u_char *), mtod(mp, u_char *) + mp->m_len, m->m_len); 1586 mp->m_len += m->m_len; 1587 MFREE(m, mp->m_next); 1588 } else 1589 mp->m_next = m; 1590 m = mp; 1591 ilen += hlen - xlen; 1592 1593 } else if (proto == PPP_VJC_UNCOMP) { 1594 if ((sc->sc_flags & SC_REJ_COMP_TCP) || sc->sc_comp == 0) 1595 goto bad; 1596 1597 xlen = sl_uncompress_tcp_core(cp + PPP_HDRLEN, m->m_len - PPP_HDRLEN, 1598 ilen - PPP_HDRLEN, TYPE_UNCOMPRESSED_TCP, 1599 sc->sc_comp, &iphdr, &hlen); 1600 1601 if (xlen < 0) { 1602 if (sc->sc_flags & SC_DEBUG) 1603 printf("%s: VJ uncompress failed on type uncomp\n", 1604 ifp->if_xname); 1605 goto bad; 1606 } 1607 1608 proto = PPP_IP; 1609 cp[3] = PPP_IP; 1610 } 1611 #endif /* VJC */ 1612 1613 /* 1614 * If the packet will fit in a header mbuf, don't waste a 1615 * whole cluster on it. 1616 */ 1617 if (ilen <= MHLEN && M_IS_CLUSTER(m)) { 1618 MGETHDR(mp, M_DONTWAIT, MT_DATA); 1619 if (mp != NULL) { 1620 m_copydata(m, 0, ilen, mtod(mp, void *)); 1621 m_freem(m); 1622 m = mp; 1623 m->m_len = ilen; 1624 } 1625 } 1626 m->m_pkthdr.len = ilen; 1627 m->m_pkthdr.rcvif = ifp; 1628 1629 if ((proto & 0x8000) == 0) { 1630 #ifdef PPP_FILTER 1631 /* 1632 * See whether we want to pass this packet, and 1633 * if it counts as link activity. 1634 */ 1635 if (sc->sc_pass_filt_in.bf_insns != 0 1636 && bpf_filter(sc->sc_pass_filt_in.bf_insns, (u_char *) m, 1637 ilen, 0) == 0) { 1638 /* drop this packet */ 1639 m_freem(m); 1640 return; 1641 } 1642 if (sc->sc_active_filt_in.bf_insns == 0 1643 || bpf_filter(sc->sc_active_filt_in.bf_insns, (u_char *) m, 1644 ilen, 0)) 1645 sc->sc_last_recv = time_second; 1646 #else 1647 /* 1648 * Record the time that we received this packet. 1649 */ 1650 sc->sc_last_recv = time_second; 1651 #endif /* PPP_FILTER */ 1652 } 1653 1654 #if NBPFILTER > 0 1655 /* See if bpf wants to look at the packet. */ 1656 if (sc->sc_if.if_bpf) 1657 bpf_mtap(sc->sc_if.if_bpf, m); 1658 #endif 1659 1660 rv = 0; 1661 switch (proto) { 1662 #ifdef INET 1663 case PPP_IP: 1664 /* 1665 * IP packet - take off the ppp header and pass it up to IP. 1666 */ 1667 if ((ifp->if_flags & IFF_UP) == 0 1668 || sc->sc_npmode[NP_IP] != NPMODE_PASS) { 1669 /* interface is down - drop the packet. */ 1670 m_freem(m); 1671 return; 1672 } 1673 m->m_pkthdr.len -= PPP_HDRLEN; 1674 m->m_data += PPP_HDRLEN; 1675 m->m_len -= PPP_HDRLEN; 1676 #ifdef GATEWAY 1677 if (ipflow_fastforward(m)) 1678 return; 1679 #endif 1680 schednetisr(NETISR_IP); 1681 inq = &ipintrq; 1682 break; 1683 #endif 1684 1685 #ifdef INET6 1686 case PPP_IPV6: 1687 /* 1688 * IPv6 packet - take off the ppp header and pass it up to IPv6. 1689 */ 1690 if ((ifp->if_flags & IFF_UP) == 0 1691 || sc->sc_npmode[NP_IPV6] != NPMODE_PASS) { 1692 /* interface is down - drop the packet. */ 1693 m_freem(m); 1694 return; 1695 } 1696 m->m_pkthdr.len -= PPP_HDRLEN; 1697 m->m_data += PPP_HDRLEN; 1698 m->m_len -= PPP_HDRLEN; 1699 #ifdef GATEWAY 1700 if (ip6flow_fastforward(m)) 1701 return; 1702 #endif 1703 schednetisr(NETISR_IPV6); 1704 inq = &ip6intrq; 1705 break; 1706 #endif 1707 1708 default: 1709 /* 1710 * Some other protocol - place on input queue for read(). 1711 */ 1712 inq = &sc->sc_inq; 1713 rv = 1; 1714 break; 1715 } 1716 1717 /* 1718 * Put the packet on the appropriate input queue. 1719 */ 1720 s = splnet(); 1721 if (IF_QFULL(inq)) { 1722 IF_DROP(inq); 1723 splx(s); 1724 if (sc->sc_flags & SC_DEBUG) 1725 printf("%s: input queue full\n", ifp->if_xname); 1726 ifp->if_iqdrops++; 1727 goto bad; 1728 } 1729 IF_ENQUEUE(inq, m); 1730 splx(s); 1731 ifp->if_ipackets++; 1732 ifp->if_ibytes += ilen; 1733 1734 if (rv) 1735 (*sc->sc_ctlp)(sc); 1736 1737 return; 1738 1739 bad: 1740 m_freem(m); 1741 sc->sc_if.if_ierrors++; 1742 sc->sc_stats.ppp_ierrors++; 1743 } 1744 1745 #define MAX_DUMP_BYTES 128 1746 1747 static void 1748 pppdumpm(struct mbuf *m0) 1749 { 1750 char buf[3*MAX_DUMP_BYTES+4]; 1751 char *bp = buf; 1752 struct mbuf *m; 1753 1754 for (m = m0; m; m = m->m_next) { 1755 int l = m->m_len; 1756 u_char *rptr = (u_char *)m->m_data; 1757 1758 while (l--) { 1759 if (bp > buf + sizeof(buf) - 4) 1760 goto done; 1761 *bp++ = hexdigits[*rptr >> 4]; /* convert byte to ascii hex */ 1762 *bp++ = hexdigits[*rptr++ & 0xf]; 1763 } 1764 1765 if (m->m_next) { 1766 if (bp > buf + sizeof(buf) - 3) 1767 goto done; 1768 *bp++ = '|'; 1769 } else 1770 *bp++ = ' '; 1771 } 1772 done: 1773 if (m) 1774 *bp++ = '>'; 1775 *bp = 0; 1776 printf("%s\n", buf); 1777 } 1778 1779 #ifdef ALTQ 1780 /* 1781 * a wrapper to transmit a packet from if_start since ALTQ uses 1782 * if_start to send a packet. 1783 */ 1784 static void 1785 ppp_ifstart(struct ifnet *ifp) 1786 { 1787 struct ppp_softc *sc; 1788 1789 sc = ifp->if_softc; 1790 (*sc->sc_start)(sc); 1791 } 1792 #endif 1793
Indexes created Fri Oct 03 02:09:57 GMT 2025