if_ppp.c revision 1.105.10.1
1 /* $NetBSD: if_ppp.c,v 1.105.10.1 2006/05/24 15:50:44 tron 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 1.105.10.1 2006/05/24 15:50:44 tron 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> 129 130 #include <net/if.h> 131 #include <net/if_types.h> 132 #include <net/netisr.h> 133 #include <net/route.h> 134 #ifdef PPP_FILTER 135 #include <net/bpf.h> 136 #endif 137 138 #include <machine/intr.h> 139 140 #include <netinet/in.h> 141 #include <netinet/in_systm.h> 142 #include <netinet/in_var.h> 143 #ifdef INET 144 #include <netinet/ip.h> 145 #endif 146 147 #include "bpfilter.h" 148 #if NBPFILTER > 0 149 #include <sys/time.h> 150 #include <net/bpf.h> 151 #endif 152 153 #if defined(PPP_FILTER) || NBPFILTER > 0 154 #include <net/slip.h> 155 #endif 156 157 #ifdef VJC 158 #include <net/slcompress.h> 159 #endif 160 161 #include <net/ppp_defs.h> 162 #include <net/if_ppp.h> 163 #include <net/if_pppvar.h> 164 #include <machine/cpu.h> 165 166 #ifdef PPP_COMPRESS 167 #define PACKETPTR struct mbuf * 168 #include <net/ppp-comp.h> 169 #endif 170 171 static int pppsioctl(struct ifnet *, u_long, caddr_t); 172 static void ppp_requeue(struct ppp_softc *); 173 static void ppp_ccp(struct ppp_softc *, struct mbuf *m, int rcvd); 174 static void ppp_ccp_closed(struct ppp_softc *); 175 static void ppp_inproc(struct ppp_softc *, struct mbuf *); 176 static void pppdumpm(struct mbuf *m0); 177 #ifdef ALTQ 178 static void ppp_ifstart(struct ifnet *ifp); 179 #endif 180 181 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 182 void pppnetisr(void); 183 #endif 184 static void pppintr(void *); 185 186 /* 187 * Some useful mbuf macros not in mbuf.h. 188 */ 189 #define M_IS_CLUSTER(m) ((m)->m_flags & M_EXT) 190 191 #define M_DATASTART(m) \ 192 (M_IS_CLUSTER(m) ? (m)->m_ext.ext_buf : \ 193 (m)->m_flags & M_PKTHDR ? (m)->m_pktdat : (m)->m_dat) 194 195 #define M_DATASIZE(m) \ 196 (M_IS_CLUSTER(m) ? (m)->m_ext.ext_size : \ 197 (m)->m_flags & M_PKTHDR ? MHLEN: MLEN) 198 199 /* 200 * We define two link layer specific mbuf flags, to mark high-priority 201 * packets for output, and received packets following lost/corrupted 202 * packets. 203 */ 204 #define M_HIGHPRI M_LINK0 /* output packet for sc_fastq */ 205 #define M_ERRMARK M_LINK1 /* rx packet following lost/corrupted pkt */ 206 207 static int ppp_clone_create(struct if_clone *, int); 208 static int ppp_clone_destroy(struct ifnet *); 209 210 static struct ppp_softc *ppp_create(const char *, int); 211 212 static LIST_HEAD(, ppp_softc) ppp_softc_list; 213 214 struct if_clone ppp_cloner = 215 IF_CLONE_INITIALIZER("ppp", ppp_clone_create, ppp_clone_destroy); 216 217 static struct simplelock ppp_list_mutex = SIMPLELOCK_INITIALIZER; 218 219 #ifdef PPP_COMPRESS 220 /* 221 * List of compressors we know about. 222 * We leave some space so maybe we can modload compressors. 223 */ 224 225 extern struct compressor ppp_bsd_compress; 226 extern struct compressor ppp_deflate, ppp_deflate_draft; 227 228 struct compressor *ppp_compressors[PPP_COMPRESSORS_MAX] = { 229 #if DO_BSD_COMPRESS && defined(PPP_BSDCOMP) 230 &ppp_bsd_compress, 231 #endif 232 #if DO_DEFLATE && defined(PPP_DEFLATE) 233 &ppp_deflate, 234 &ppp_deflate_draft, 235 #endif 236 NULL 237 }; 238 #endif /* PPP_COMPRESS */ 239 240 241 /* 242 * Called from boot code to establish ppp interfaces. 243 */ 244 void 245 pppattach(void) 246 { 247 extern struct linesw ppp_disc; 248 249 if (ttyldisc_attach(&ppp_disc) != 0) 250 panic("pppattach"); 251 LIST_INIT(&ppp_softc_list); 252 if_clone_attach(&ppp_cloner); 253 } 254 255 static struct ppp_softc * 256 ppp_create(const char *name, int unit) 257 { 258 struct ppp_softc *sc, *sci, *scl = NULL; 259 260 MALLOC(sc, struct ppp_softc *, sizeof(*sc), M_DEVBUF, M_WAIT|M_ZERO); 261 262 simple_lock(&ppp_list_mutex); 263 if (unit == -1) { 264 int i = 0; 265 LIST_FOREACH(sci, &ppp_softc_list, sc_iflist) { 266 scl = sci; 267 if (i < sci->sc_unit) { 268 unit = i; 269 break; 270 } else { 271 #ifdef DIAGNOSTIC 272 KASSERT(i == sci->sc_unit); 273 #endif 274 i++; 275 } 276 } 277 if (unit == -1) 278 unit = i; 279 } else { 280 LIST_FOREACH(sci, &ppp_softc_list, sc_iflist) { 281 scl = sci; 282 if (unit < sci->sc_unit) 283 break; 284 else if (unit == sci->sc_unit) { 285 FREE(sc, M_DEVBUF); 286 return NULL; 287 } 288 } 289 } 290 291 if (sci != NULL) 292 LIST_INSERT_BEFORE(sci, sc, sc_iflist); 293 else if (scl != NULL) 294 LIST_INSERT_AFTER(scl, sc, sc_iflist); 295 else 296 LIST_INSERT_HEAD(&ppp_softc_list, sc, sc_iflist); 297 298 simple_unlock(&ppp_list_mutex); 299 300 (void)snprintf(sc->sc_if.if_xname, sizeof(sc->sc_if.if_xname), "%s%d", 301 name, sc->sc_unit = unit); 302 callout_init(&sc->sc_timo_ch); 303 sc->sc_if.if_softc = sc; 304 sc->sc_if.if_mtu = PPP_MTU; 305 sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST; 306 sc->sc_if.if_type = IFT_PPP; 307 sc->sc_if.if_hdrlen = PPP_HDRLEN; 308 sc->sc_if.if_dlt = DLT_NULL; 309 sc->sc_if.if_ioctl = pppsioctl; 310 sc->sc_if.if_output = pppoutput; 311 #ifdef ALTQ 312 sc->sc_if.if_start = ppp_ifstart; 313 #endif 314 IFQ_SET_MAXLEN(&sc->sc_if.if_snd, IFQ_MAXLEN); 315 sc->sc_inq.ifq_maxlen = IFQ_MAXLEN; 316 sc->sc_fastq.ifq_maxlen = IFQ_MAXLEN; 317 sc->sc_rawq.ifq_maxlen = IFQ_MAXLEN; 318 /* Ratio of 1:2 packets between the regular and the fast queue */ 319 sc->sc_maxfastq = 2; 320 IFQ_SET_READY(&sc->sc_if.if_snd); 321 if_attach(&sc->sc_if); 322 if_alloc_sadl(&sc->sc_if); 323 #if NBPFILTER > 0 324 bpfattach(&sc->sc_if, DLT_NULL, 0); 325 #endif 326 return sc; 327 } 328 329 static int 330 ppp_clone_create(struct if_clone *ifc, int unit) 331 { 332 return ppp_create(ifc->ifc_name, unit) == NULL ? EEXIST : 0; 333 } 334 335 static int 336 ppp_clone_destroy(struct ifnet *ifp) 337 { 338 struct ppp_softc *sc = (struct ppp_softc *)ifp->if_softc; 339 340 if (sc->sc_devp != NULL) 341 return EBUSY; /* Not removing it */ 342 343 simple_lock(&ppp_list_mutex); 344 LIST_REMOVE(sc, sc_iflist); 345 simple_unlock(&ppp_list_mutex); 346 347 #if NBPFILTER > 0 348 bpfdetach(ifp); 349 #endif 350 if_detach(ifp); 351 352 FREE(sc, M_DEVBUF); 353 return 0; 354 } 355 356 /* 357 * Allocate a ppp interface unit and initialize it. 358 */ 359 struct ppp_softc * 360 pppalloc(pid_t pid) 361 { 362 struct ppp_softc *sc = NULL, *scf; 363 int i; 364 365 simple_lock(&ppp_list_mutex); 366 for (scf = LIST_FIRST(&ppp_softc_list); scf != NULL; 367 scf = LIST_NEXT(scf, sc_iflist)) { 368 if (scf->sc_xfer == pid) { 369 scf->sc_xfer = 0; 370 simple_unlock(&ppp_list_mutex); 371 return scf; 372 } 373 if (scf->sc_devp == NULL && sc == NULL) 374 sc = scf; 375 } 376 simple_unlock(&ppp_list_mutex); 377 378 if (sc == NULL) 379 sc = ppp_create(ppp_cloner.ifc_name, -1); 380 381 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 382 sc->sc_si = softintr_establish(IPL_SOFTNET, pppintr, sc); 383 if (sc->sc_si == NULL) { 384 printf("%s: unable to establish softintr\n", sc->sc_if.if_xname); 385 return (NULL); 386 } 387 #endif 388 sc->sc_flags = 0; 389 sc->sc_mru = PPP_MRU; 390 sc->sc_relinq = NULL; 391 (void)memset(&sc->sc_stats, 0, sizeof(sc->sc_stats)); 392 #ifdef VJC 393 MALLOC(sc->sc_comp, struct slcompress *, sizeof(struct slcompress), 394 M_DEVBUF, M_NOWAIT); 395 if (sc->sc_comp) 396 sl_compress_init(sc->sc_comp); 397 #endif 398 #ifdef PPP_COMPRESS 399 sc->sc_xc_state = NULL; 400 sc->sc_rc_state = NULL; 401 #endif /* PPP_COMPRESS */ 402 for (i = 0; i < NUM_NP; ++i) 403 sc->sc_npmode[i] = NPMODE_ERROR; 404 sc->sc_npqueue = NULL; 405 sc->sc_npqtail = &sc->sc_npqueue; 406 sc->sc_last_sent = sc->sc_last_recv = time.tv_sec; 407 408 return sc; 409 } 410 411 /* 412 * Deallocate a ppp unit. Must be called at splsoftnet or higher. 413 */ 414 void 415 pppdealloc(struct ppp_softc *sc) 416 { 417 struct mbuf *m; 418 419 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 420 softintr_disestablish(sc->sc_si); 421 #endif 422 if_down(&sc->sc_if); 423 sc->sc_if.if_flags &= ~(IFF_UP|IFF_RUNNING); 424 sc->sc_devp = NULL; 425 sc->sc_xfer = 0; 426 for (;;) { 427 IF_DEQUEUE(&sc->sc_rawq, m); 428 if (m == NULL) 429 break; 430 m_freem(m); 431 } 432 for (;;) { 433 IF_DEQUEUE(&sc->sc_inq, m); 434 if (m == NULL) 435 break; 436 m_freem(m); 437 } 438 for (;;) { 439 IF_DEQUEUE(&sc->sc_fastq, m); 440 if (m == NULL) 441 break; 442 m_freem(m); 443 } 444 while ((m = sc->sc_npqueue) != NULL) { 445 sc->sc_npqueue = m->m_nextpkt; 446 m_freem(m); 447 } 448 if (sc->sc_togo != NULL) { 449 m_freem(sc->sc_togo); 450 sc->sc_togo = NULL; 451 } 452 #ifdef PPP_COMPRESS 453 ppp_ccp_closed(sc); 454 sc->sc_xc_state = NULL; 455 sc->sc_rc_state = NULL; 456 #endif /* PPP_COMPRESS */ 457 #ifdef PPP_FILTER 458 if (sc->sc_pass_filt_in.bf_insns != 0) { 459 FREE(sc->sc_pass_filt_in.bf_insns, M_DEVBUF); 460 sc->sc_pass_filt_in.bf_insns = 0; 461 sc->sc_pass_filt_in.bf_len = 0; 462 } 463 if (sc->sc_pass_filt_out.bf_insns != 0) { 464 FREE(sc->sc_pass_filt_out.bf_insns, M_DEVBUF); 465 sc->sc_pass_filt_out.bf_insns = 0; 466 sc->sc_pass_filt_out.bf_len = 0; 467 } 468 if (sc->sc_active_filt_in.bf_insns != 0) { 469 FREE(sc->sc_active_filt_in.bf_insns, M_DEVBUF); 470 sc->sc_active_filt_in.bf_insns = 0; 471 sc->sc_active_filt_in.bf_len = 0; 472 } 473 if (sc->sc_active_filt_out.bf_insns != 0) { 474 FREE(sc->sc_active_filt_out.bf_insns, M_DEVBUF); 475 sc->sc_active_filt_out.bf_insns = 0; 476 sc->sc_active_filt_out.bf_len = 0; 477 } 478 #endif /* PPP_FILTER */ 479 #ifdef VJC 480 if (sc->sc_comp != 0) { 481 FREE(sc->sc_comp, M_DEVBUF); 482 sc->sc_comp = 0; 483 } 484 #endif 485 (void)ppp_clone_destroy(&sc->sc_if); 486 } 487 488 /* 489 * Ioctl routine for generic ppp devices. 490 */ 491 int 492 pppioctl(struct ppp_softc *sc, u_long cmd, caddr_t data, int flag, 493 struct proc *p) 494 { 495 int s, error, flags, mru, npx; 496 u_int nb; 497 struct ppp_option_data *odp; 498 struct compressor **cp; 499 struct npioctl *npi; 500 time_t t; 501 #ifdef PPP_FILTER 502 struct bpf_program *bp, *nbp; 503 struct bpf_insn *newcode, *oldcode; 504 int newcodelen; 505 #endif /* PPP_FILTER */ 506 #ifdef PPP_COMPRESS 507 u_char ccp_option[CCP_MAX_OPTION_LENGTH]; 508 #endif 509 510 switch (cmd) { 511 case FIONREAD: 512 *(int *)data = sc->sc_inq.ifq_len; 513 break; 514 515 case PPPIOCGUNIT: 516 *(int *)data = sc->sc_unit; 517 break; 518 519 case PPPIOCGFLAGS: 520 *(u_int *)data = sc->sc_flags; 521 break; 522 523 case PPPIOCGRAWIN: 524 { 525 struct ppp_rawin *rwin = (struct ppp_rawin *)data; 526 u_char c, q = 0; 527 528 for (c = sc->sc_rawin_start; c < sizeof(sc->sc_rawin.buf);) 529 rwin->buf[q++] = sc->sc_rawin.buf[c++]; 530 531 for (c = 0; c < sc->sc_rawin_start;) 532 rwin->buf[q++] = sc->sc_rawin.buf[c++]; 533 534 rwin->count = sc->sc_rawin.count; 535 } 536 break; 537 538 case PPPIOCSFLAGS: 539 if ((error = kauth_authorize_generic(p->p_cred, KAUTH_GENERIC_ISSUSER, &p->p_acflag)) != 0) 540 return (error); 541 flags = *(int *)data & SC_MASK; 542 s = splsoftnet(); 543 #ifdef PPP_COMPRESS 544 if (sc->sc_flags & SC_CCP_OPEN && !(flags & SC_CCP_OPEN)) 545 ppp_ccp_closed(sc); 546 #endif 547 splhigh(); /* XXX IMP ME HARDER */ 548 sc->sc_flags = (sc->sc_flags & ~SC_MASK) | flags; 549 splx(s); 550 break; 551 552 case PPPIOCSMRU: 553 if ((error = kauth_authorize_generic(p->p_cred, KAUTH_GENERIC_ISSUSER, &p->p_acflag)) != 0) 554 return (error); 555 mru = *(int *)data; 556 if (mru >= PPP_MINMRU && mru <= PPP_MAXMRU) 557 sc->sc_mru = mru; 558 break; 559 560 case PPPIOCGMRU: 561 *(int *)data = sc->sc_mru; 562 break; 563 564 #ifdef VJC 565 case PPPIOCSMAXCID: 566 if ((error = kauth_authorize_generic(p->p_cred, KAUTH_GENERIC_ISSUSER, &p->p_acflag)) != 0) 567 return (error); 568 if (sc->sc_comp) { 569 s = splsoftnet(); 570 sl_compress_setup(sc->sc_comp, *(int *)data); 571 splx(s); 572 } 573 break; 574 #endif 575 576 case PPPIOCXFERUNIT: 577 if ((error = kauth_authorize_generic(p->p_cred, KAUTH_GENERIC_ISSUSER, &p->p_acflag)) != 0) 578 return (error); 579 sc->sc_xfer = p->p_pid; 580 break; 581 582 #ifdef PPP_COMPRESS 583 case PPPIOCSCOMPRESS: 584 if ((error = kauth_authorize_generic(p->p_cred, KAUTH_GENERIC_ISSUSER, &p->p_acflag)) != 0) 585 return (error); 586 odp = (struct ppp_option_data *) data; 587 nb = odp->length; 588 if (nb > sizeof(ccp_option)) 589 nb = sizeof(ccp_option); 590 if ((error = copyin(odp->ptr, ccp_option, nb)) != 0) 591 return (error); 592 if (ccp_option[1] < 2) /* preliminary check on the length byte */ 593 return (EINVAL); 594 for (cp = ppp_compressors; *cp != NULL; ++cp) 595 if ((*cp)->compress_proto == ccp_option[0]) { 596 /* 597 * Found a handler for the protocol - try to allocate 598 * a compressor or decompressor. 599 */ 600 error = 0; 601 if (odp->transmit) { 602 s = splsoftnet(); 603 if (sc->sc_xc_state != NULL) 604 (*sc->sc_xcomp->comp_free)(sc->sc_xc_state); 605 sc->sc_xcomp = *cp; 606 sc->sc_xc_state = (*cp)->comp_alloc(ccp_option, nb); 607 if (sc->sc_xc_state == NULL) { 608 if (sc->sc_flags & SC_DEBUG) 609 printf("%s: comp_alloc failed\n", 610 sc->sc_if.if_xname); 611 error = ENOBUFS; 612 } 613 splhigh(); /* XXX IMP ME HARDER */ 614 sc->sc_flags &= ~SC_COMP_RUN; 615 splx(s); 616 } else { 617 s = splsoftnet(); 618 if (sc->sc_rc_state != NULL) 619 (*sc->sc_rcomp->decomp_free)(sc->sc_rc_state); 620 sc->sc_rcomp = *cp; 621 sc->sc_rc_state = (*cp)->decomp_alloc(ccp_option, nb); 622 if (sc->sc_rc_state == NULL) { 623 if (sc->sc_flags & SC_DEBUG) 624 printf("%s: decomp_alloc failed\n", 625 sc->sc_if.if_xname); 626 error = ENOBUFS; 627 } 628 splhigh(); /* XXX IMP ME HARDER */ 629 sc->sc_flags &= ~SC_DECOMP_RUN; 630 splx(s); 631 } 632 return (error); 633 } 634 if (sc->sc_flags & SC_DEBUG) 635 printf("%s: no compressor for [%x %x %x], %x\n", 636 sc->sc_if.if_xname, ccp_option[0], ccp_option[1], 637 ccp_option[2], nb); 638 return (EINVAL); /* no handler found */ 639 #endif /* PPP_COMPRESS */ 640 641 case PPPIOCGNPMODE: 642 case PPPIOCSNPMODE: 643 npi = (struct npioctl *) data; 644 switch (npi->protocol) { 645 case PPP_IP: 646 npx = NP_IP; 647 break; 648 case PPP_IPV6: 649 npx = NP_IPV6; 650 break; 651 default: 652 return EINVAL; 653 } 654 if (cmd == PPPIOCGNPMODE) { 655 npi->mode = sc->sc_npmode[npx]; 656 } else { 657 if ((error = kauth_authorize_generic(p->p_cred, KAUTH_GENERIC_ISSUSER, &p->p_acflag)) != 0) 658 return (error); 659 if (npi->mode != sc->sc_npmode[npx]) { 660 s = splnet(); 661 sc->sc_npmode[npx] = npi->mode; 662 if (npi->mode != NPMODE_QUEUE) { 663 ppp_requeue(sc); 664 ppp_restart(sc); 665 } 666 splx(s); 667 } 668 } 669 break; 670 671 case PPPIOCGIDLE: 672 s = splsoftnet(); 673 t = time.tv_sec; 674 ((struct ppp_idle *)data)->xmit_idle = t - sc->sc_last_sent; 675 ((struct ppp_idle *)data)->recv_idle = t - sc->sc_last_recv; 676 splx(s); 677 break; 678 679 #ifdef PPP_FILTER 680 case PPPIOCSPASS: 681 case PPPIOCSACTIVE: 682 /* These are no longer supported. */ 683 return EOPNOTSUPP; 684 685 case PPPIOCSIPASS: 686 case PPPIOCSOPASS: 687 case PPPIOCSIACTIVE: 688 case PPPIOCSOACTIVE: 689 nbp = (struct bpf_program *) data; 690 if ((unsigned) nbp->bf_len > BPF_MAXINSNS) 691 return EINVAL; 692 newcodelen = nbp->bf_len * sizeof(struct bpf_insn); 693 if (newcodelen != 0) { 694 newcode = malloc(newcodelen, M_DEVBUF, M_WAITOK); 695 /* WAITOK -- malloc() never fails. */ 696 if ((error = copyin((caddr_t)nbp->bf_insns, (caddr_t)newcode, 697 newcodelen)) != 0) { 698 free(newcode, M_DEVBUF); 699 return error; 700 } 701 if (!bpf_validate(newcode, nbp->bf_len)) { 702 free(newcode, M_DEVBUF); 703 return EINVAL; 704 } 705 } else 706 newcode = 0; 707 switch (cmd) { 708 case PPPIOCSIPASS: 709 bp = &sc->sc_pass_filt_in; 710 break; 711 712 case PPPIOCSOPASS: 713 bp = &sc->sc_pass_filt_out; 714 break; 715 716 case PPPIOCSIACTIVE: 717 bp = &sc->sc_active_filt_in; 718 break; 719 720 case PPPIOCSOACTIVE: 721 bp = &sc->sc_active_filt_out; 722 break; 723 default: 724 free(newcode, M_DEVBUF); 725 return (EPASSTHROUGH); 726 } 727 oldcode = bp->bf_insns; 728 s = splnet(); 729 bp->bf_len = nbp->bf_len; 730 bp->bf_insns = newcode; 731 splx(s); 732 if (oldcode != 0) 733 free(oldcode, M_DEVBUF); 734 break; 735 #endif /* PPP_FILTER */ 736 737 default: 738 return (EPASSTHROUGH); 739 } 740 return (0); 741 } 742 743 /* 744 * Process an ioctl request to the ppp network interface. 745 */ 746 static int 747 pppsioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 748 { 749 struct proc *p = curproc; /* XXX */ 750 struct ppp_softc *sc = ifp->if_softc; 751 struct ifaddr *ifa = (struct ifaddr *)data; 752 struct ifreq *ifr = (struct ifreq *)data; 753 struct ppp_stats *psp; 754 #ifdef PPP_COMPRESS 755 struct ppp_comp_stats *pcp; 756 #endif 757 int s = splnet(), error = 0; 758 759 switch (cmd) { 760 case SIOCSIFFLAGS: 761 if ((ifp->if_flags & IFF_RUNNING) == 0) 762 ifp->if_flags &= ~IFF_UP; 763 break; 764 765 case SIOCSIFADDR: 766 switch (ifa->ifa_addr->sa_family) { 767 #ifdef INET 768 case AF_INET: 769 break; 770 #endif 771 #ifdef INET6 772 case AF_INET6: 773 break; 774 #endif 775 default: 776 error = EAFNOSUPPORT; 777 break; 778 } 779 break; 780 781 case SIOCSIFDSTADDR: 782 switch (ifa->ifa_addr->sa_family) { 783 #ifdef INET 784 case AF_INET: 785 break; 786 #endif 787 #ifdef INET6 788 case AF_INET6: 789 break; 790 #endif 791 default: 792 error = EAFNOSUPPORT; 793 break; 794 } 795 break; 796 797 case SIOCSIFMTU: 798 if ((error = kauth_authorize_generic(p->p_cred, KAUTH_GENERIC_ISSUSER, &p->p_acflag)) != 0) 799 break; 800 sc->sc_if.if_mtu = ifr->ifr_mtu; 801 break; 802 803 case SIOCGIFMTU: 804 ifr->ifr_mtu = sc->sc_if.if_mtu; 805 break; 806 807 case SIOCADDMULTI: 808 case SIOCDELMULTI: 809 if (ifr == 0) { 810 error = EAFNOSUPPORT; 811 break; 812 } 813 switch (ifr->ifr_addr.sa_family) { 814 #ifdef INET 815 case AF_INET: 816 break; 817 #endif 818 #ifdef INET6 819 case AF_INET6: 820 break; 821 #endif 822 default: 823 error = EAFNOSUPPORT; 824 break; 825 } 826 break; 827 828 case SIOCGPPPSTATS: 829 psp = &((struct ifpppstatsreq *) data)->stats; 830 memset(psp, 0, sizeof(*psp)); 831 psp->p = sc->sc_stats; 832 #if defined(VJC) && !defined(SL_NO_STATS) 833 if (sc->sc_comp) { 834 psp->vj.vjs_packets = sc->sc_comp->sls_packets; 835 psp->vj.vjs_compressed = sc->sc_comp->sls_compressed; 836 psp->vj.vjs_searches = sc->sc_comp->sls_searches; 837 psp->vj.vjs_misses = sc->sc_comp->sls_misses; 838 psp->vj.vjs_uncompressedin = sc->sc_comp->sls_uncompressedin; 839 psp->vj.vjs_compressedin = sc->sc_comp->sls_compressedin; 840 psp->vj.vjs_errorin = sc->sc_comp->sls_errorin; 841 psp->vj.vjs_tossed = sc->sc_comp->sls_tossed; 842 } 843 #endif /* VJC */ 844 break; 845 846 #ifdef PPP_COMPRESS 847 case SIOCGPPPCSTATS: 848 pcp = &((struct ifpppcstatsreq *) data)->stats; 849 memset(pcp, 0, sizeof(*pcp)); 850 if (sc->sc_xc_state != NULL) 851 (*sc->sc_xcomp->comp_stat)(sc->sc_xc_state, &pcp->c); 852 if (sc->sc_rc_state != NULL) 853 (*sc->sc_rcomp->decomp_stat)(sc->sc_rc_state, &pcp->d); 854 break; 855 #endif /* PPP_COMPRESS */ 856 857 default: 858 error = EINVAL; 859 } 860 splx(s); 861 return (error); 862 } 863 864 /* 865 * Queue a packet. Start transmission if not active. 866 * Packet is placed in Information field of PPP frame. 867 */ 868 int 869 pppoutput(struct ifnet *ifp, struct mbuf *m0, struct sockaddr *dst, 870 struct rtentry *rtp) 871 { 872 struct ppp_softc *sc = ifp->if_softc; 873 int protocol, address, control; 874 u_char *cp; 875 int s, error; 876 #ifdef INET 877 struct ip *ip; 878 #endif 879 struct ifqueue *ifq; 880 enum NPmode mode; 881 int len; 882 ALTQ_DECL(struct altq_pktattr pktattr;) 883 884 if (sc->sc_devp == NULL || (ifp->if_flags & IFF_RUNNING) == 0 885 || ((ifp->if_flags & IFF_UP) == 0 && dst->sa_family != AF_UNSPEC)) { 886 error = ENETDOWN; /* sort of */ 887 goto bad; 888 } 889 890 IFQ_CLASSIFY(&ifp->if_snd, m0, dst->sa_family, &pktattr); 891 892 /* 893 * Compute PPP header. 894 */ 895 m0->m_flags &= ~M_HIGHPRI; 896 switch (dst->sa_family) { 897 #ifdef INET 898 case AF_INET: 899 address = PPP_ALLSTATIONS; 900 control = PPP_UI; 901 protocol = PPP_IP; 902 mode = sc->sc_npmode[NP_IP]; 903 904 /* 905 * If this packet has the "low delay" bit set in the IP header, 906 * put it on the fastq instead. 907 */ 908 ip = mtod(m0, struct ip *); 909 if (ip->ip_tos & IPTOS_LOWDELAY) 910 m0->m_flags |= M_HIGHPRI; 911 break; 912 #endif 913 #ifdef INET6 914 case AF_INET6: 915 address = PPP_ALLSTATIONS; /*XXX*/ 916 control = PPP_UI; /*XXX*/ 917 protocol = PPP_IPV6; 918 mode = sc->sc_npmode[NP_IPV6]; 919 920 #if 0 /* XXX flowinfo/traffic class, maybe? */ 921 /* 922 * If this packet has the "low delay" bit set in the IP header, 923 * put it on the fastq instead. 924 */ 925 ip = mtod(m0, struct ip *); 926 if (ip->ip_tos & IPTOS_LOWDELAY) 927 m0->m_flags |= M_HIGHPRI; 928 #endif 929 break; 930 #endif 931 case AF_UNSPEC: 932 address = PPP_ADDRESS(dst->sa_data); 933 control = PPP_CONTROL(dst->sa_data); 934 protocol = PPP_PROTOCOL(dst->sa_data); 935 mode = NPMODE_PASS; 936 break; 937 default: 938 printf("%s: af%d not supported\n", ifp->if_xname, dst->sa_family); 939 error = EAFNOSUPPORT; 940 goto bad; 941 } 942 943 /* 944 * Drop this packet, or return an error, if necessary. 945 */ 946 if (mode == NPMODE_ERROR) { 947 error = ENETDOWN; 948 goto bad; 949 } 950 if (mode == NPMODE_DROP) { 951 error = 0; 952 goto bad; 953 } 954 955 /* 956 * Add PPP header. 957 */ 958 M_PREPEND(m0, PPP_HDRLEN, M_DONTWAIT); 959 if (m0 == NULL) { 960 error = ENOBUFS; 961 goto bad; 962 } 963 964 cp = mtod(m0, u_char *); 965 *cp++ = address; 966 *cp++ = control; 967 *cp++ = protocol >> 8; 968 *cp++ = protocol & 0xff; 969 970 len = m_length(m0); 971 972 if (sc->sc_flags & SC_LOG_OUTPKT) { 973 printf("%s output: ", ifp->if_xname); 974 pppdumpm(m0); 975 } 976 977 if ((protocol & 0x8000) == 0) { 978 #ifdef PPP_FILTER 979 /* 980 * Apply the pass and active filters to the packet, 981 * but only if it is a data packet. 982 */ 983 if (sc->sc_pass_filt_out.bf_insns != 0 984 && bpf_filter(sc->sc_pass_filt_out.bf_insns, (u_char *) m0, 985 len, 0) == 0) { 986 error = 0; /* drop this packet */ 987 goto bad; 988 } 989 990 /* 991 * Update the time we sent the most recent packet. 992 */ 993 if (sc->sc_active_filt_out.bf_insns == 0 994 || bpf_filter(sc->sc_active_filt_out.bf_insns, (u_char *) m0, 995 len, 0)) 996 sc->sc_last_sent = time.tv_sec; 997 #else 998 /* 999 * Update the time we sent the most recent packet. 1000 */ 1001 sc->sc_last_sent = time.tv_sec; 1002 #endif /* PPP_FILTER */ 1003 } 1004 1005 #if NBPFILTER > 0 1006 /* 1007 * See if bpf wants to look at the packet. 1008 */ 1009 if (sc->sc_if.if_bpf) 1010 bpf_mtap(sc->sc_if.if_bpf, m0); 1011 #endif 1012 1013 /* 1014 * Put the packet on the appropriate queue. 1015 */ 1016 s = splnet(); 1017 if (mode == NPMODE_QUEUE) { 1018 /* XXX we should limit the number of packets on this queue */ 1019 *sc->sc_npqtail = m0; 1020 m0->m_nextpkt = NULL; 1021 sc->sc_npqtail = &m0->m_nextpkt; 1022 } else { 1023 ifq = (m0->m_flags & M_HIGHPRI) ? &sc->sc_fastq : NULL; 1024 if ((error = ifq_enqueue2(&sc->sc_if, ifq, m0 1025 ALTQ_COMMA ALTQ_DECL(&pktattr))) != 0) { 1026 splx(s); 1027 sc->sc_if.if_oerrors++; 1028 sc->sc_stats.ppp_oerrors++; 1029 return (error); 1030 } 1031 ppp_restart(sc); 1032 } 1033 ifp->if_opackets++; 1034 ifp->if_obytes += len; 1035 1036 splx(s); 1037 return (0); 1038 1039 bad: 1040 m_freem(m0); 1041 return (error); 1042 } 1043 1044 /* 1045 * After a change in the NPmode for some NP, move packets from the 1046 * npqueue to the send queue or the fast queue as appropriate. 1047 * Should be called at splnet, since we muck with the queues. 1048 */ 1049 static void 1050 ppp_requeue(struct ppp_softc *sc) 1051 { 1052 struct mbuf *m, **mpp; 1053 struct ifqueue *ifq; 1054 enum NPmode mode; 1055 int error; 1056 1057 for (mpp = &sc->sc_npqueue; (m = *mpp) != NULL; ) { 1058 switch (PPP_PROTOCOL(mtod(m, u_char *))) { 1059 case PPP_IP: 1060 mode = sc->sc_npmode[NP_IP]; 1061 break; 1062 case PPP_IPV6: 1063 mode = sc->sc_npmode[NP_IPV6]; 1064 break; 1065 default: 1066 mode = NPMODE_PASS; 1067 } 1068 1069 switch (mode) { 1070 case NPMODE_PASS: 1071 /* 1072 * This packet can now go on one of the queues to be sent. 1073 */ 1074 *mpp = m->m_nextpkt; 1075 m->m_nextpkt = NULL; 1076 ifq = (m->m_flags & M_HIGHPRI) ? &sc->sc_fastq : NULL; 1077 if ((error = ifq_enqueue2(&sc->sc_if, ifq, m ALTQ_COMMA 1078 ALTQ_DECL(NULL))) != 0) { 1079 sc->sc_if.if_oerrors++; 1080 sc->sc_stats.ppp_oerrors++; 1081 } 1082 break; 1083 1084 case NPMODE_DROP: 1085 case NPMODE_ERROR: 1086 *mpp = m->m_nextpkt; 1087 m_freem(m); 1088 break; 1089 1090 case NPMODE_QUEUE: 1091 mpp = &m->m_nextpkt; 1092 break; 1093 } 1094 } 1095 sc->sc_npqtail = mpp; 1096 } 1097 1098 /* 1099 * Transmitter has finished outputting some stuff; 1100 * remember to call sc->sc_start later at splsoftnet. 1101 */ 1102 void 1103 ppp_restart(struct ppp_softc *sc) 1104 { 1105 int s = splhigh(); /* XXX IMP ME HARDER */ 1106 1107 sc->sc_flags &= ~SC_TBUSY; 1108 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1109 softintr_schedule(sc->sc_si); 1110 #else 1111 schednetisr(NETISR_PPP); 1112 #endif 1113 splx(s); 1114 } 1115 1116 /* 1117 * Get a packet to send. This procedure is intended to be called at 1118 * splsoftnet, since it may involve time-consuming operations such as 1119 * applying VJ compression, packet compression, address/control and/or 1120 * protocol field compression to the packet. 1121 */ 1122 struct mbuf * 1123 ppp_dequeue(struct ppp_softc *sc) 1124 { 1125 struct mbuf *m, *mp; 1126 u_char *cp; 1127 int address, control, protocol; 1128 int s; 1129 1130 /* 1131 * Grab a packet to send: first try the fast queue, then the 1132 * normal queue. 1133 */ 1134 s = splnet(); 1135 if (sc->sc_nfastq < sc->sc_maxfastq) { 1136 IF_DEQUEUE(&sc->sc_fastq, m); 1137 if (m != NULL) 1138 sc->sc_nfastq++; 1139 else 1140 IFQ_DEQUEUE(&sc->sc_if.if_snd, m); 1141 } else { 1142 sc->sc_nfastq = 0; 1143 IFQ_DEQUEUE(&sc->sc_if.if_snd, m); 1144 if (m == NULL) { 1145 IF_DEQUEUE(&sc->sc_fastq, m); 1146 if (m != NULL) 1147 sc->sc_nfastq++; 1148 } 1149 } 1150 splx(s); 1151 1152 if (m == NULL) 1153 return NULL; 1154 1155 ++sc->sc_stats.ppp_opackets; 1156 1157 /* 1158 * Extract the ppp header of the new packet. 1159 * The ppp header will be in one mbuf. 1160 */ 1161 cp = mtod(m, u_char *); 1162 address = PPP_ADDRESS(cp); 1163 control = PPP_CONTROL(cp); 1164 protocol = PPP_PROTOCOL(cp); 1165 1166 switch (protocol) { 1167 case PPP_IP: 1168 #ifdef VJC 1169 /* 1170 * If the packet is a TCP/IP packet, see if we can compress it. 1171 */ 1172 if ((sc->sc_flags & SC_COMP_TCP) && sc->sc_comp != NULL) { 1173 struct ip *ip; 1174 int type; 1175 1176 mp = m; 1177 ip = (struct ip *) (cp + PPP_HDRLEN); 1178 if (mp->m_len <= PPP_HDRLEN) { 1179 mp = mp->m_next; 1180 if (mp == NULL) 1181 break; 1182 ip = mtod(mp, struct ip *); 1183 } 1184 /* this code assumes the IP/TCP header is in one non-shared mbuf */ 1185 if (ip->ip_p == IPPROTO_TCP) { 1186 type = sl_compress_tcp(mp, ip, sc->sc_comp, 1187 !(sc->sc_flags & SC_NO_TCP_CCID)); 1188 switch (type) { 1189 case TYPE_UNCOMPRESSED_TCP: 1190 protocol = PPP_VJC_UNCOMP; 1191 break; 1192 case TYPE_COMPRESSED_TCP: 1193 protocol = PPP_VJC_COMP; 1194 cp = mtod(m, u_char *); 1195 cp[0] = address; /* header has moved */ 1196 cp[1] = control; 1197 cp[2] = 0; 1198 break; 1199 } 1200 cp[3] = protocol; /* update protocol in PPP header */ 1201 } 1202 } 1203 #endif /* VJC */ 1204 break; 1205 1206 #ifdef PPP_COMPRESS 1207 case PPP_CCP: 1208 ppp_ccp(sc, m, 0); 1209 break; 1210 #endif /* PPP_COMPRESS */ 1211 } 1212 1213 #ifdef PPP_COMPRESS 1214 if (protocol != PPP_LCP && protocol != PPP_CCP 1215 && sc->sc_xc_state && (sc->sc_flags & SC_COMP_RUN)) { 1216 struct mbuf *mcomp = NULL; 1217 int slen; 1218 1219 slen = 0; 1220 for (mp = m; mp != NULL; mp = mp->m_next) 1221 slen += mp->m_len; 1222 (*sc->sc_xcomp->compress) 1223 (sc->sc_xc_state, &mcomp, m, slen, sc->sc_if.if_mtu + PPP_HDRLEN); 1224 if (mcomp != NULL) { 1225 if (sc->sc_flags & SC_CCP_UP) { 1226 /* Send the compressed packet instead of the original. */ 1227 m_freem(m); 1228 m = mcomp; 1229 cp = mtod(m, u_char *); 1230 protocol = cp[3]; 1231 } else { 1232 /* Can't transmit compressed packets until CCP is up. */ 1233 m_freem(mcomp); 1234 } 1235 } 1236 } 1237 #endif /* PPP_COMPRESS */ 1238 1239 /* 1240 * Compress the address/control and protocol, if possible. 1241 */ 1242 if (sc->sc_flags & SC_COMP_AC && address == PPP_ALLSTATIONS && 1243 control == PPP_UI && protocol != PPP_ALLSTATIONS && 1244 protocol != PPP_LCP) { 1245 /* can compress address/control */ 1246 m->m_data += 2; 1247 m->m_len -= 2; 1248 } 1249 if (sc->sc_flags & SC_COMP_PROT && protocol < 0xFF) { 1250 /* can compress protocol */ 1251 if (mtod(m, u_char *) == cp) { 1252 cp[2] = cp[1]; /* move address/control up */ 1253 cp[1] = cp[0]; 1254 } 1255 ++m->m_data; 1256 --m->m_len; 1257 } 1258 1259 return m; 1260 } 1261 1262 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1263 void 1264 pppnetisr(void) 1265 { 1266 struct ppp_softc *sc; 1267 1268 for (sc = LIST_FIRST(&ppp_softc_list); sc != NULL; 1269 sc = LIST_NEXT(sc, sc_iflist)) 1270 pppintr(sc); 1271 } 1272 #endif 1273 1274 /* 1275 * Software interrupt routine, called at splsoftnet. 1276 */ 1277 static void 1278 pppintr(void *arg) 1279 { 1280 struct ppp_softc *sc = arg; 1281 struct mbuf *m; 1282 int s; 1283 1284 if (!(sc->sc_flags & SC_TBUSY) 1285 && (IFQ_IS_EMPTY(&sc->sc_if.if_snd) == 0 || sc->sc_fastq.ifq_head 1286 || sc->sc_outm)) { 1287 s = splhigh(); /* XXX IMP ME HARDER */ 1288 sc->sc_flags |= SC_TBUSY; 1289 splx(s); 1290 (*sc->sc_start)(sc); 1291 } 1292 for (;;) { 1293 s = splnet(); 1294 IF_DEQUEUE(&sc->sc_rawq, m); 1295 splx(s); 1296 if (m == NULL) 1297 break; 1298 ppp_inproc(sc, m); 1299 } 1300 } 1301 1302 #ifdef PPP_COMPRESS 1303 /* 1304 * Handle a CCP packet. `rcvd' is 1 if the packet was received, 1305 * 0 if it is about to be transmitted. 1306 */ 1307 static void 1308 ppp_ccp(struct ppp_softc *sc, struct mbuf *m, int rcvd) 1309 { 1310 u_char *dp, *ep; 1311 struct mbuf *mp; 1312 int slen, s; 1313 1314 /* 1315 * Get a pointer to the data after the PPP header. 1316 */ 1317 if (m->m_len <= PPP_HDRLEN) { 1318 mp = m->m_next; 1319 if (mp == NULL) 1320 return; 1321 dp = (mp != NULL)? mtod(mp, u_char *): NULL; 1322 } else { 1323 mp = m; 1324 dp = mtod(mp, u_char *) + PPP_HDRLEN; 1325 } 1326 1327 ep = mtod(mp, u_char *) + mp->m_len; 1328 if (dp + CCP_HDRLEN > ep) 1329 return; 1330 slen = CCP_LENGTH(dp); 1331 if (dp + slen > ep) { 1332 if (sc->sc_flags & SC_DEBUG) 1333 printf("if_ppp/ccp: not enough data in mbuf (%p+%x > %p+%x)\n", 1334 dp, slen, mtod(mp, u_char *), mp->m_len); 1335 return; 1336 } 1337 1338 switch (CCP_CODE(dp)) { 1339 case CCP_CONFREQ: 1340 case CCP_TERMREQ: 1341 case CCP_TERMACK: 1342 /* CCP must be going down - disable compression */ 1343 if (sc->sc_flags & SC_CCP_UP) { 1344 s = splhigh(); /* XXX IMP ME HARDER */ 1345 sc->sc_flags &= ~(SC_CCP_UP | SC_COMP_RUN | SC_DECOMP_RUN); 1346 splx(s); 1347 } 1348 break; 1349 1350 case CCP_CONFACK: 1351 if (sc->sc_flags & SC_CCP_OPEN && !(sc->sc_flags & SC_CCP_UP) 1352 && slen >= CCP_HDRLEN + CCP_OPT_MINLEN 1353 && slen >= CCP_OPT_LENGTH(dp + CCP_HDRLEN) + CCP_HDRLEN) { 1354 if (!rcvd) { 1355 /* we're agreeing to send compressed packets. */ 1356 if (sc->sc_xc_state != NULL 1357 && (*sc->sc_xcomp->comp_init) 1358 (sc->sc_xc_state, dp + CCP_HDRLEN, slen - CCP_HDRLEN, 1359 sc->sc_unit, 0, sc->sc_flags & SC_DEBUG)) { 1360 s = splhigh(); /* XXX IMP ME HARDER */ 1361 sc->sc_flags |= SC_COMP_RUN; 1362 splx(s); 1363 } 1364 } else { 1365 /* peer is agreeing to send compressed packets. */ 1366 if (sc->sc_rc_state != NULL 1367 && (*sc->sc_rcomp->decomp_init) 1368 (sc->sc_rc_state, dp + CCP_HDRLEN, slen - CCP_HDRLEN, 1369 sc->sc_unit, 0, sc->sc_mru, 1370 sc->sc_flags & SC_DEBUG)) { 1371 s = splhigh(); /* XXX IMP ME HARDER */ 1372 sc->sc_flags |= SC_DECOMP_RUN; 1373 sc->sc_flags &= ~(SC_DC_ERROR | SC_DC_FERROR); 1374 splx(s); 1375 } 1376 } 1377 } 1378 break; 1379 1380 case CCP_RESETACK: 1381 if (sc->sc_flags & SC_CCP_UP) { 1382 if (!rcvd) { 1383 if (sc->sc_xc_state && (sc->sc_flags & SC_COMP_RUN)) 1384 (*sc->sc_xcomp->comp_reset)(sc->sc_xc_state); 1385 } else { 1386 if (sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN)) { 1387 (*sc->sc_rcomp->decomp_reset)(sc->sc_rc_state); 1388 s = splhigh(); /* XXX IMP ME HARDER */ 1389 sc->sc_flags &= ~SC_DC_ERROR; 1390 splx(s); 1391 } 1392 } 1393 } 1394 break; 1395 } 1396 } 1397 1398 /* 1399 * CCP is down; free (de)compressor state if necessary. 1400 */ 1401 static void 1402 ppp_ccp_closed(struct ppp_softc *sc) 1403 { 1404 if (sc->sc_xc_state) { 1405 (*sc->sc_xcomp->comp_free)(sc->sc_xc_state); 1406 sc->sc_xc_state = NULL; 1407 } 1408 if (sc->sc_rc_state) { 1409 (*sc->sc_rcomp->decomp_free)(sc->sc_rc_state); 1410 sc->sc_rc_state = NULL; 1411 } 1412 } 1413 #endif /* PPP_COMPRESS */ 1414 1415 /* 1416 * PPP packet input routine. 1417 * The caller has checked and removed the FCS and has inserted 1418 * the address/control bytes and the protocol high byte if they 1419 * were omitted. 1420 */ 1421 void 1422 ppppktin(struct ppp_softc *sc, struct mbuf *m, int lost) 1423 { 1424 int s = splhigh(); /* XXX IMP ME HARDER */ 1425 1426 if (lost) 1427 m->m_flags |= M_ERRMARK; 1428 IF_ENQUEUE(&sc->sc_rawq, m); 1429 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1430 softintr_schedule(sc->sc_si); 1431 #else 1432 schednetisr(NETISR_PPP); 1433 #endif 1434 splx(s); 1435 } 1436 1437 /* 1438 * Process a received PPP packet, doing decompression as necessary. 1439 * Should be called at splsoftnet. 1440 */ 1441 #define COMPTYPE(proto) ((proto) == PPP_VJC_COMP? TYPE_COMPRESSED_TCP: \ 1442 TYPE_UNCOMPRESSED_TCP) 1443 1444 static void 1445 ppp_inproc(struct ppp_softc *sc, struct mbuf *m) 1446 { 1447 struct ifnet *ifp = &sc->sc_if; 1448 struct ifqueue *inq; 1449 int s, ilen, proto, rv; 1450 u_char *cp, adrs, ctrl; 1451 struct mbuf *mp, *dmp = NULL; 1452 #ifdef VJC 1453 int xlen; 1454 u_char *iphdr; 1455 u_int hlen; 1456 #endif 1457 1458 sc->sc_stats.ppp_ipackets++; 1459 1460 if (sc->sc_flags & SC_LOG_INPKT) { 1461 ilen = 0; 1462 for (mp = m; mp != NULL; mp = mp->m_next) 1463 ilen += mp->m_len; 1464 printf("%s: got %d bytes\n", ifp->if_xname, ilen); 1465 pppdumpm(m); 1466 } 1467 1468 cp = mtod(m, u_char *); 1469 adrs = PPP_ADDRESS(cp); 1470 ctrl = PPP_CONTROL(cp); 1471 proto = PPP_PROTOCOL(cp); 1472 1473 if (m->m_flags & M_ERRMARK) { 1474 m->m_flags &= ~M_ERRMARK; 1475 s = splhigh(); /* XXX IMP ME HARDER */ 1476 sc->sc_flags |= SC_VJ_RESET; 1477 splx(s); 1478 } 1479 1480 #ifdef PPP_COMPRESS 1481 /* 1482 * Decompress this packet if necessary, update the receiver's 1483 * dictionary, or take appropriate action on a CCP packet. 1484 */ 1485 if (proto == PPP_COMP && sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN) 1486 && !(sc->sc_flags & SC_DC_ERROR) && !(sc->sc_flags & SC_DC_FERROR)) { 1487 /* decompress this packet */ 1488 rv = (*sc->sc_rcomp->decompress)(sc->sc_rc_state, m, &dmp); 1489 if (rv == DECOMP_OK) { 1490 m_freem(m); 1491 if (dmp == NULL) { 1492 /* no error, but no decompressed packet produced */ 1493 return; 1494 } 1495 m = dmp; 1496 cp = mtod(m, u_char *); 1497 proto = PPP_PROTOCOL(cp); 1498 1499 } else { 1500 /* 1501 * An error has occurred in decompression. 1502 * Pass the compressed packet up to pppd, which may take 1503 * CCP down or issue a Reset-Req. 1504 */ 1505 if (sc->sc_flags & SC_DEBUG) 1506 printf("%s: decompress failed %d\n", ifp->if_xname, rv); 1507 s = splhigh(); /* XXX IMP ME HARDER */ 1508 sc->sc_flags |= SC_VJ_RESET; 1509 if (rv == DECOMP_ERROR) 1510 sc->sc_flags |= SC_DC_ERROR; 1511 else 1512 sc->sc_flags |= SC_DC_FERROR; 1513 splx(s); 1514 } 1515 1516 } else { 1517 if (sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN)) { 1518 (*sc->sc_rcomp->incomp)(sc->sc_rc_state, m); 1519 } 1520 if (proto == PPP_CCP) { 1521 ppp_ccp(sc, m, 1); 1522 } 1523 } 1524 #endif 1525 1526 ilen = 0; 1527 for (mp = m; mp != NULL; mp = mp->m_next) 1528 ilen += mp->m_len; 1529 1530 #ifdef VJC 1531 if (sc->sc_flags & SC_VJ_RESET) { 1532 /* 1533 * If we've missed a packet, we must toss subsequent compressed 1534 * packets which don't have an explicit connection ID. 1535 */ 1536 if (sc->sc_comp) 1537 sl_uncompress_tcp(NULL, 0, TYPE_ERROR, sc->sc_comp); 1538 s = splhigh(); /* XXX IMP ME HARDER */ 1539 sc->sc_flags &= ~SC_VJ_RESET; 1540 splx(s); 1541 } 1542 1543 /* 1544 * See if we have a VJ-compressed packet to uncompress. 1545 */ 1546 if (proto == PPP_VJC_COMP) { 1547 if ((sc->sc_flags & SC_REJ_COMP_TCP) || sc->sc_comp == 0) 1548 goto bad; 1549 1550 xlen = sl_uncompress_tcp_core(cp + PPP_HDRLEN, m->m_len - PPP_HDRLEN, 1551 ilen - PPP_HDRLEN, TYPE_COMPRESSED_TCP, 1552 sc->sc_comp, &iphdr, &hlen); 1553 1554 if (xlen <= 0) { 1555 if (sc->sc_flags & SC_DEBUG) 1556 printf("%s: VJ uncompress failed on type comp\n", 1557 ifp->if_xname); 1558 goto bad; 1559 } 1560 1561 /* Copy the PPP and IP headers into a new mbuf. */ 1562 MGETHDR(mp, M_DONTWAIT, MT_DATA); 1563 if (mp == NULL) 1564 goto bad; 1565 mp->m_len = 0; 1566 mp->m_next = NULL; 1567 if (hlen + PPP_HDRLEN > MHLEN) { 1568 MCLGET(mp, M_DONTWAIT); 1569 if (M_TRAILINGSPACE(mp) < hlen + PPP_HDRLEN) { 1570 m_freem(mp); 1571 goto bad; /* lose if big headers and no clusters */ 1572 } 1573 } 1574 cp = mtod(mp, u_char *); 1575 cp[0] = adrs; 1576 cp[1] = ctrl; 1577 cp[2] = 0; 1578 cp[3] = PPP_IP; 1579 proto = PPP_IP; 1580 bcopy(iphdr, cp + PPP_HDRLEN, hlen); 1581 mp->m_len = hlen + PPP_HDRLEN; 1582 1583 /* 1584 * Trim the PPP and VJ headers off the old mbuf 1585 * and stick the new and old mbufs together. 1586 */ 1587 m->m_data += PPP_HDRLEN + xlen; 1588 m->m_len -= PPP_HDRLEN + xlen; 1589 if (m->m_len <= M_TRAILINGSPACE(mp)) { 1590 bcopy(mtod(m, u_char *), mtod(mp, u_char *) + mp->m_len, m->m_len); 1591 mp->m_len += m->m_len; 1592 MFREE(m, mp->m_next); 1593 } else 1594 mp->m_next = m; 1595 m = mp; 1596 ilen += hlen - xlen; 1597 1598 } else if (proto == PPP_VJC_UNCOMP) { 1599 if ((sc->sc_flags & SC_REJ_COMP_TCP) || sc->sc_comp == 0) 1600 goto bad; 1601 1602 xlen = sl_uncompress_tcp_core(cp + PPP_HDRLEN, m->m_len - PPP_HDRLEN, 1603 ilen - PPP_HDRLEN, TYPE_UNCOMPRESSED_TCP, 1604 sc->sc_comp, &iphdr, &hlen); 1605 1606 if (xlen < 0) { 1607 if (sc->sc_flags & SC_DEBUG) 1608 printf("%s: VJ uncompress failed on type uncomp\n", 1609 ifp->if_xname); 1610 goto bad; 1611 } 1612 1613 proto = PPP_IP; 1614 cp[3] = PPP_IP; 1615 } 1616 #endif /* VJC */ 1617 1618 /* 1619 * If the packet will fit in a header mbuf, don't waste a 1620 * whole cluster on it. 1621 */ 1622 if (ilen <= MHLEN && M_IS_CLUSTER(m)) { 1623 MGETHDR(mp, M_DONTWAIT, MT_DATA); 1624 if (mp != NULL) { 1625 m_copydata(m, 0, ilen, mtod(mp, caddr_t)); 1626 m_freem(m); 1627 m = mp; 1628 m->m_len = ilen; 1629 } 1630 } 1631 m->m_pkthdr.len = ilen; 1632 m->m_pkthdr.rcvif = ifp; 1633 1634 if ((proto & 0x8000) == 0) { 1635 #ifdef PPP_FILTER 1636 /* 1637 * See whether we want to pass this packet, and 1638 * if it counts as link activity. 1639 */ 1640 if (sc->sc_pass_filt_in.bf_insns != 0 1641 && bpf_filter(sc->sc_pass_filt_in.bf_insns, (u_char *) m, 1642 ilen, 0) == 0) { 1643 /* drop this packet */ 1644 m_freem(m); 1645 return; 1646 } 1647 if (sc->sc_active_filt_in.bf_insns == 0 1648 || bpf_filter(sc->sc_active_filt_in.bf_insns, (u_char *) m, 1649 ilen, 0)) 1650 sc->sc_last_recv = time.tv_sec; 1651 #else 1652 /* 1653 * Record the time that we received this packet. 1654 */ 1655 sc->sc_last_recv = time.tv_sec; 1656 #endif /* PPP_FILTER */ 1657 } 1658 1659 #if NBPFILTER > 0 1660 /* See if bpf wants to look at the packet. */ 1661 if (sc->sc_if.if_bpf) 1662 bpf_mtap(sc->sc_if.if_bpf, m); 1663 #endif 1664 1665 rv = 0; 1666 switch (proto) { 1667 #ifdef INET 1668 case PPP_IP: 1669 /* 1670 * IP packet - take off the ppp header and pass it up to IP. 1671 */ 1672 if ((ifp->if_flags & IFF_UP) == 0 1673 || sc->sc_npmode[NP_IP] != NPMODE_PASS) { 1674 /* interface is down - drop the packet. */ 1675 m_freem(m); 1676 return; 1677 } 1678 m->m_pkthdr.len -= PPP_HDRLEN; 1679 m->m_data += PPP_HDRLEN; 1680 m->m_len -= PPP_HDRLEN; 1681 #ifdef GATEWAY 1682 if (ipflow_fastforward(m)) 1683 return; 1684 #endif 1685 schednetisr(NETISR_IP); 1686 inq = &ipintrq; 1687 break; 1688 #endif 1689 1690 #ifdef INET6 1691 case PPP_IPV6: 1692 /* 1693 * IPv6 packet - take off the ppp header and pass it up to IPv6. 1694 */ 1695 if ((ifp->if_flags & IFF_UP) == 0 1696 || sc->sc_npmode[NP_IPV6] != NPMODE_PASS) { 1697 /* interface is down - drop the packet. */ 1698 m_freem(m); 1699 return; 1700 } 1701 m->m_pkthdr.len -= PPP_HDRLEN; 1702 m->m_data += PPP_HDRLEN; 1703 m->m_len -= PPP_HDRLEN; 1704 schednetisr(NETISR_IPV6); 1705 inq = &ip6intrq; 1706 break; 1707 #endif 1708 1709 default: 1710 /* 1711 * Some other protocol - place on input queue for read(). 1712 */ 1713 inq = &sc->sc_inq; 1714 rv = 1; 1715 break; 1716 } 1717 1718 /* 1719 * Put the packet on the appropriate input queue. 1720 */ 1721 s = splnet(); 1722 if (IF_QFULL(inq)) { 1723 IF_DROP(inq); 1724 splx(s); 1725 if (sc->sc_flags & SC_DEBUG) 1726 printf("%s: input queue full\n", ifp->if_xname); 1727 ifp->if_iqdrops++; 1728 goto bad; 1729 } 1730 IF_ENQUEUE(inq, m); 1731 splx(s); 1732 ifp->if_ipackets++; 1733 ifp->if_ibytes += ilen; 1734 1735 if (rv) 1736 (*sc->sc_ctlp)(sc); 1737 1738 return; 1739 1740 bad: 1741 m_freem(m); 1742 sc->sc_if.if_ierrors++; 1743 sc->sc_stats.ppp_ierrors++; 1744 } 1745 1746 #define MAX_DUMP_BYTES 128 1747 1748 static void 1749 pppdumpm(struct mbuf *m0) 1750 { 1751 char buf[3*MAX_DUMP_BYTES+4]; 1752 char *bp = buf; 1753 struct mbuf *m; 1754 1755 for (m = m0; m; m = m->m_next) { 1756 int l = m->m_len; 1757 u_char *rptr = (u_char *)m->m_data; 1758 1759 while (l--) { 1760 if (bp > buf + sizeof(buf) - 4) 1761 goto done; 1762 *bp++ = hexdigits[*rptr >> 4]; /* convert byte to ascii hex */ 1763 *bp++ = hexdigits[*rptr++ & 0xf]; 1764 } 1765 1766 if (m->m_next) { 1767 if (bp > buf + sizeof(buf) - 3) 1768 goto done; 1769 *bp++ = '|'; 1770 } else 1771 *bp++ = ' '; 1772 } 1773 done: 1774 if (m) 1775 *bp++ = '>'; 1776 *bp = 0; 1777 printf("%s\n", buf); 1778 } 1779 1780 #ifdef ALTQ 1781 /* 1782 * a wrapper to transmit a packet from if_start since ALTQ uses 1783 * if_start to send a packet. 1784 */ 1785 static void 1786 ppp_ifstart(struct ifnet *ifp) 1787 { 1788 struct ppp_softc *sc; 1789 1790 sc = ifp->if_softc; 1791 (*sc->sc_start)(sc); 1792 } 1793 #endif 1794
Indexes created Fri Oct 03 02:09:57 GMT 2025