if_ppp.c revision 1.111
1 /* $NetBSD: if_ppp.c,v 1.111 2006/11/16 01:33:40 christos 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 1.111 2006/11/16 01:33:40 christos 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 <net/bpf.h> 150 #endif 151 152 #if defined(PPP_FILTER) || NBPFILTER > 0 153 #include <net/slip.h> 154 #endif 155 156 #ifdef VJC 157 #include <net/slcompress.h> 158 #endif 159 160 #include <net/ppp_defs.h> 161 #include <net/if_ppp.h> 162 #include <net/if_pppvar.h> 163 #include <machine/cpu.h> 164 165 #ifdef PPP_COMPRESS 166 #define PACKETPTR struct mbuf * 167 #include <net/ppp-comp.h> 168 #endif 169 170 static int pppsioctl(struct ifnet *, u_long, caddr_t); 171 static void ppp_requeue(struct ppp_softc *); 172 static void ppp_ccp(struct ppp_softc *, struct mbuf *m, int rcvd); 173 static void ppp_ccp_closed(struct ppp_softc *); 174 static void ppp_inproc(struct ppp_softc *, struct mbuf *); 175 static void pppdumpm(struct mbuf *m0); 176 #ifdef ALTQ 177 static void ppp_ifstart(struct ifnet *ifp); 178 #endif 179 180 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 181 void pppnetisr(void); 182 #endif 183 static void pppintr(void *); 184 185 /* 186 * Some useful mbuf macros not in mbuf.h. 187 */ 188 #define M_IS_CLUSTER(m) ((m)->m_flags & M_EXT) 189 190 #define M_DATASTART(m) \ 191 (M_IS_CLUSTER(m) ? (m)->m_ext.ext_buf : \ 192 (m)->m_flags & M_PKTHDR ? (m)->m_pktdat : (m)->m_dat) 193 194 #define M_DATASIZE(m) \ 195 (M_IS_CLUSTER(m) ? (m)->m_ext.ext_size : \ 196 (m)->m_flags & M_PKTHDR ? MHLEN: MLEN) 197 198 /* 199 * We define two link layer specific mbuf flags, to mark high-priority 200 * packets for output, and received packets following lost/corrupted 201 * packets. 202 */ 203 #define M_HIGHPRI M_LINK0 /* output packet for sc_fastq */ 204 #define M_ERRMARK M_LINK1 /* rx packet following lost/corrupted pkt */ 205 206 static int ppp_clone_create(struct if_clone *, int); 207 static int ppp_clone_destroy(struct ifnet *); 208 209 static struct ppp_softc *ppp_create(const char *, int); 210 211 static LIST_HEAD(, ppp_softc) ppp_softc_list; 212 213 struct if_clone ppp_cloner = 214 IF_CLONE_INITIALIZER("ppp", ppp_clone_create, ppp_clone_destroy); 215 216 static struct simplelock ppp_list_mutex = SIMPLELOCK_INITIALIZER; 217 218 #ifdef PPP_COMPRESS 219 /* 220 * List of compressors we know about. 221 * We leave some space so maybe we can modload compressors. 222 */ 223 224 extern struct compressor ppp_bsd_compress; 225 extern struct compressor ppp_deflate, ppp_deflate_draft; 226 227 struct compressor *ppp_compressors[PPP_COMPRESSORS_MAX] = { 228 #if DO_BSD_COMPRESS && defined(PPP_BSDCOMP) 229 &ppp_bsd_compress, 230 #endif 231 #if DO_DEFLATE && defined(PPP_DEFLATE) 232 &ppp_deflate, 233 &ppp_deflate_draft, 234 #endif 235 NULL 236 }; 237 #endif /* PPP_COMPRESS */ 238 239 240 /* 241 * Called from boot code to establish ppp interfaces. 242 */ 243 void 244 pppattach(void) 245 { 246 extern struct linesw ppp_disc; 247 248 if (ttyldisc_attach(&ppp_disc) != 0) 249 panic("pppattach"); 250 LIST_INIT(&ppp_softc_list); 251 if_clone_attach(&ppp_cloner); 252 } 253 254 static struct ppp_softc * 255 ppp_create(const char *name, int unit) 256 { 257 struct ppp_softc *sc, *sci, *scl = NULL; 258 259 MALLOC(sc, struct ppp_softc *, sizeof(*sc), M_DEVBUF, M_WAIT|M_ZERO); 260 261 simple_lock(&ppp_list_mutex); 262 if (unit == -1) { 263 int i = 0; 264 LIST_FOREACH(sci, &ppp_softc_list, sc_iflist) { 265 scl = sci; 266 if (i < sci->sc_unit) { 267 unit = i; 268 break; 269 } else { 270 #ifdef DIAGNOSTIC 271 KASSERT(i == sci->sc_unit); 272 #endif 273 i++; 274 } 275 } 276 if (unit == -1) 277 unit = i; 278 } else { 279 LIST_FOREACH(sci, &ppp_softc_list, sc_iflist) { 280 scl = sci; 281 if (unit < sci->sc_unit) 282 break; 283 else if (unit == sci->sc_unit) { 284 FREE(sc, M_DEVBUF); 285 return NULL; 286 } 287 } 288 } 289 290 if (sci != NULL) 291 LIST_INSERT_BEFORE(sci, sc, sc_iflist); 292 else if (scl != NULL) 293 LIST_INSERT_AFTER(scl, sc, sc_iflist); 294 else 295 LIST_INSERT_HEAD(&ppp_softc_list, sc, sc_iflist); 296 297 simple_unlock(&ppp_list_mutex); 298 299 (void)snprintf(sc->sc_if.if_xname, sizeof(sc->sc_if.if_xname), "%s%d", 300 name, sc->sc_unit = unit); 301 callout_init(&sc->sc_timo_ch); 302 sc->sc_if.if_softc = sc; 303 sc->sc_if.if_mtu = PPP_MTU; 304 sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST; 305 sc->sc_if.if_type = IFT_PPP; 306 sc->sc_if.if_hdrlen = PPP_HDRLEN; 307 sc->sc_if.if_dlt = DLT_NULL; 308 sc->sc_if.if_ioctl = pppsioctl; 309 sc->sc_if.if_output = pppoutput; 310 #ifdef ALTQ 311 sc->sc_if.if_start = ppp_ifstart; 312 #endif 313 IFQ_SET_MAXLEN(&sc->sc_if.if_snd, IFQ_MAXLEN); 314 sc->sc_inq.ifq_maxlen = IFQ_MAXLEN; 315 sc->sc_fastq.ifq_maxlen = IFQ_MAXLEN; 316 sc->sc_rawq.ifq_maxlen = IFQ_MAXLEN; 317 /* Ratio of 1:2 packets between the regular and the fast queue */ 318 sc->sc_maxfastq = 2; 319 IFQ_SET_READY(&sc->sc_if.if_snd); 320 if_attach(&sc->sc_if); 321 if_alloc_sadl(&sc->sc_if); 322 #if NBPFILTER > 0 323 bpfattach(&sc->sc_if, DLT_NULL, 0); 324 #endif 325 return sc; 326 } 327 328 static int 329 ppp_clone_create(struct if_clone *ifc, int unit) 330 { 331 return ppp_create(ifc->ifc_name, unit) == NULL ? EEXIST : 0; 332 } 333 334 static int 335 ppp_clone_destroy(struct ifnet *ifp) 336 { 337 struct ppp_softc *sc = (struct ppp_softc *)ifp->if_softc; 338 339 if (sc->sc_devp != NULL) 340 return EBUSY; /* Not removing it */ 341 342 simple_lock(&ppp_list_mutex); 343 LIST_REMOVE(sc, sc_iflist); 344 simple_unlock(&ppp_list_mutex); 345 346 #if NBPFILTER > 0 347 bpfdetach(ifp); 348 #endif 349 if_detach(ifp); 350 351 FREE(sc, M_DEVBUF); 352 return 0; 353 } 354 355 /* 356 * Allocate a ppp interface unit and initialize it. 357 */ 358 struct ppp_softc * 359 pppalloc(pid_t pid) 360 { 361 struct ppp_softc *sc = NULL, *scf; 362 int i; 363 364 simple_lock(&ppp_list_mutex); 365 for (scf = LIST_FIRST(&ppp_softc_list); scf != NULL; 366 scf = LIST_NEXT(scf, sc_iflist)) { 367 if (scf->sc_xfer == pid) { 368 scf->sc_xfer = 0; 369 simple_unlock(&ppp_list_mutex); 370 return scf; 371 } 372 if (scf->sc_devp == NULL && sc == NULL) 373 sc = scf; 374 } 375 simple_unlock(&ppp_list_mutex); 376 377 if (sc == NULL) 378 sc = ppp_create(ppp_cloner.ifc_name, -1); 379 380 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 381 sc->sc_si = softintr_establish(IPL_SOFTNET, pppintr, sc); 382 if (sc->sc_si == NULL) { 383 printf("%s: unable to establish softintr\n", sc->sc_if.if_xname); 384 return (NULL); 385 } 386 #endif 387 sc->sc_flags = 0; 388 sc->sc_mru = PPP_MRU; 389 sc->sc_relinq = NULL; 390 (void)memset(&sc->sc_stats, 0, sizeof(sc->sc_stats)); 391 #ifdef VJC 392 MALLOC(sc->sc_comp, struct slcompress *, sizeof(struct slcompress), 393 M_DEVBUF, M_NOWAIT); 394 if (sc->sc_comp) 395 sl_compress_init(sc->sc_comp); 396 #endif 397 #ifdef PPP_COMPRESS 398 sc->sc_xc_state = NULL; 399 sc->sc_rc_state = NULL; 400 #endif /* PPP_COMPRESS */ 401 for (i = 0; i < NUM_NP; ++i) 402 sc->sc_npmode[i] = NPMODE_ERROR; 403 sc->sc_npqueue = NULL; 404 sc->sc_npqtail = &sc->sc_npqueue; 405 sc->sc_last_sent = sc->sc_last_recv = time_second; 406 407 return sc; 408 } 409 410 /* 411 * Deallocate a ppp unit. Must be called at splsoftnet or higher. 412 */ 413 void 414 pppdealloc(struct ppp_softc *sc) 415 { 416 struct mbuf *m; 417 418 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 419 softintr_disestablish(sc->sc_si); 420 #endif 421 if_down(&sc->sc_if); 422 sc->sc_if.if_flags &= ~(IFF_UP|IFF_RUNNING); 423 sc->sc_devp = NULL; 424 sc->sc_xfer = 0; 425 for (;;) { 426 IF_DEQUEUE(&sc->sc_rawq, m); 427 if (m == NULL) 428 break; 429 m_freem(m); 430 } 431 for (;;) { 432 IF_DEQUEUE(&sc->sc_inq, m); 433 if (m == NULL) 434 break; 435 m_freem(m); 436 } 437 for (;;) { 438 IF_DEQUEUE(&sc->sc_fastq, m); 439 if (m == NULL) 440 break; 441 m_freem(m); 442 } 443 while ((m = sc->sc_npqueue) != NULL) { 444 sc->sc_npqueue = m->m_nextpkt; 445 m_freem(m); 446 } 447 if (sc->sc_togo != NULL) { 448 m_freem(sc->sc_togo); 449 sc->sc_togo = NULL; 450 } 451 #ifdef PPP_COMPRESS 452 ppp_ccp_closed(sc); 453 sc->sc_xc_state = NULL; 454 sc->sc_rc_state = NULL; 455 #endif /* PPP_COMPRESS */ 456 #ifdef PPP_FILTER 457 if (sc->sc_pass_filt_in.bf_insns != 0) { 458 FREE(sc->sc_pass_filt_in.bf_insns, M_DEVBUF); 459 sc->sc_pass_filt_in.bf_insns = 0; 460 sc->sc_pass_filt_in.bf_len = 0; 461 } 462 if (sc->sc_pass_filt_out.bf_insns != 0) { 463 FREE(sc->sc_pass_filt_out.bf_insns, M_DEVBUF); 464 sc->sc_pass_filt_out.bf_insns = 0; 465 sc->sc_pass_filt_out.bf_len = 0; 466 } 467 if (sc->sc_active_filt_in.bf_insns != 0) { 468 FREE(sc->sc_active_filt_in.bf_insns, M_DEVBUF); 469 sc->sc_active_filt_in.bf_insns = 0; 470 sc->sc_active_filt_in.bf_len = 0; 471 } 472 if (sc->sc_active_filt_out.bf_insns != 0) { 473 FREE(sc->sc_active_filt_out.bf_insns, M_DEVBUF); 474 sc->sc_active_filt_out.bf_insns = 0; 475 sc->sc_active_filt_out.bf_len = 0; 476 } 477 #endif /* PPP_FILTER */ 478 #ifdef VJC 479 if (sc->sc_comp != 0) { 480 FREE(sc->sc_comp, M_DEVBUF); 481 sc->sc_comp = 0; 482 } 483 #endif 484 (void)ppp_clone_destroy(&sc->sc_if); 485 } 486 487 /* 488 * Ioctl routine for generic ppp devices. 489 */ 490 int 491 pppioctl(struct ppp_softc *sc, u_long cmd, caddr_t data, int flag, 492 struct lwp *l) 493 { 494 int s, error, flags, mru, npx; 495 u_int nb; 496 struct ppp_option_data *odp; 497 struct compressor **cp; 498 struct npioctl *npi; 499 time_t t; 500 #ifdef PPP_FILTER 501 struct bpf_program *bp, *nbp; 502 struct bpf_insn *newcode, *oldcode; 503 int newcodelen; 504 #endif /* PPP_FILTER */ 505 #ifdef PPP_COMPRESS 506 u_char ccp_option[CCP_MAX_OPTION_LENGTH]; 507 #endif 508 509 switch (cmd) { 510 case PPPIOCSFLAGS: 511 case PPPIOCSMRU: 512 case PPPIOCSMAXCID: 513 case PPPIOCSCOMPRESS: 514 case PPPIOCSNPMODE: 515 if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_INTERFACE, 516 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, &sc->sc_if, (void *)cmd, 517 NULL) != 0) 518 return (EPERM); 519 break; 520 case PPPIOCXFERUNIT: 521 /* XXX: Why is this privileged?! */ 522 if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_INTERFACE, 523 KAUTH_REQ_NETWORK_INTERFACE_GETPRIV, &sc->sc_if, (void *)cmd, 524 NULL) != 0) 525 return (EPERM); 526 break; 527 default: 528 break; 529 } 530 531 switch (cmd) { 532 case FIONREAD: 533 *(int *)data = sc->sc_inq.ifq_len; 534 break; 535 536 case PPPIOCGUNIT: 537 *(int *)data = sc->sc_unit; 538 break; 539 540 case PPPIOCGFLAGS: 541 *(u_int *)data = sc->sc_flags; 542 break; 543 544 case PPPIOCGRAWIN: 545 { 546 struct ppp_rawin *rwin = (struct ppp_rawin *)data; 547 u_char c, q = 0; 548 549 for (c = sc->sc_rawin_start; c < sizeof(sc->sc_rawin.buf);) 550 rwin->buf[q++] = sc->sc_rawin.buf[c++]; 551 552 for (c = 0; c < sc->sc_rawin_start;) 553 rwin->buf[q++] = sc->sc_rawin.buf[c++]; 554 555 rwin->count = sc->sc_rawin.count; 556 } 557 break; 558 559 case PPPIOCSFLAGS: 560 flags = *(int *)data & SC_MASK; 561 s = splsoftnet(); 562 #ifdef PPP_COMPRESS 563 if (sc->sc_flags & SC_CCP_OPEN && !(flags & SC_CCP_OPEN)) 564 ppp_ccp_closed(sc); 565 #endif 566 splhigh(); /* XXX IMP ME HARDER */ 567 sc->sc_flags = (sc->sc_flags & ~SC_MASK) | flags; 568 splx(s); 569 break; 570 571 case PPPIOCSMRU: 572 mru = *(int *)data; 573 if (mru >= PPP_MINMRU && mru <= PPP_MAXMRU) 574 sc->sc_mru = mru; 575 break; 576 577 case PPPIOCGMRU: 578 *(int *)data = sc->sc_mru; 579 break; 580 581 #ifdef VJC 582 case PPPIOCSMAXCID: 583 if (sc->sc_comp) { 584 s = splsoftnet(); 585 sl_compress_setup(sc->sc_comp, *(int *)data); 586 splx(s); 587 } 588 break; 589 #endif 590 591 case PPPIOCXFERUNIT: 592 sc->sc_xfer = l->l_proc->p_pid; 593 break; 594 595 #ifdef PPP_COMPRESS 596 case PPPIOCSCOMPRESS: 597 odp = (struct ppp_option_data *) data; 598 nb = odp->length; 599 if (nb > sizeof(ccp_option)) 600 nb = sizeof(ccp_option); 601 if ((error = copyin(odp->ptr, ccp_option, nb)) != 0) 602 return (error); 603 if (ccp_option[1] < 2) /* preliminary check on the length byte */ 604 return (EINVAL); 605 for (cp = ppp_compressors; *cp != NULL; ++cp) 606 if ((*cp)->compress_proto == ccp_option[0]) { 607 /* 608 * Found a handler for the protocol - try to allocate 609 * a compressor or decompressor. 610 */ 611 error = 0; 612 if (odp->transmit) { 613 s = splsoftnet(); 614 if (sc->sc_xc_state != NULL) 615 (*sc->sc_xcomp->comp_free)(sc->sc_xc_state); 616 sc->sc_xcomp = *cp; 617 sc->sc_xc_state = (*cp)->comp_alloc(ccp_option, nb); 618 if (sc->sc_xc_state == NULL) { 619 if (sc->sc_flags & SC_DEBUG) 620 printf("%s: comp_alloc failed\n", 621 sc->sc_if.if_xname); 622 error = ENOBUFS; 623 } 624 splhigh(); /* XXX IMP ME HARDER */ 625 sc->sc_flags &= ~SC_COMP_RUN; 626 splx(s); 627 } else { 628 s = splsoftnet(); 629 if (sc->sc_rc_state != NULL) 630 (*sc->sc_rcomp->decomp_free)(sc->sc_rc_state); 631 sc->sc_rcomp = *cp; 632 sc->sc_rc_state = (*cp)->decomp_alloc(ccp_option, nb); 633 if (sc->sc_rc_state == NULL) { 634 if (sc->sc_flags & SC_DEBUG) 635 printf("%s: decomp_alloc failed\n", 636 sc->sc_if.if_xname); 637 error = ENOBUFS; 638 } 639 splhigh(); /* XXX IMP ME HARDER */ 640 sc->sc_flags &= ~SC_DECOMP_RUN; 641 splx(s); 642 } 643 return (error); 644 } 645 if (sc->sc_flags & SC_DEBUG) 646 printf("%s: no compressor for [%x %x %x], %x\n", 647 sc->sc_if.if_xname, ccp_option[0], ccp_option[1], 648 ccp_option[2], nb); 649 return (EINVAL); /* no handler found */ 650 #endif /* PPP_COMPRESS */ 651 652 case PPPIOCGNPMODE: 653 case PPPIOCSNPMODE: 654 npi = (struct npioctl *) data; 655 switch (npi->protocol) { 656 case PPP_IP: 657 npx = NP_IP; 658 break; 659 case PPP_IPV6: 660 npx = NP_IPV6; 661 break; 662 default: 663 return EINVAL; 664 } 665 if (cmd == PPPIOCGNPMODE) { 666 npi->mode = sc->sc_npmode[npx]; 667 } else { 668 if (npi->mode != sc->sc_npmode[npx]) { 669 s = splnet(); 670 sc->sc_npmode[npx] = npi->mode; 671 if (npi->mode != NPMODE_QUEUE) { 672 ppp_requeue(sc); 673 ppp_restart(sc); 674 } 675 splx(s); 676 } 677 } 678 break; 679 680 case PPPIOCGIDLE: 681 s = splsoftnet(); 682 t = time_second; 683 ((struct ppp_idle *)data)->xmit_idle = t - sc->sc_last_sent; 684 ((struct ppp_idle *)data)->recv_idle = t - sc->sc_last_recv; 685 splx(s); 686 break; 687 688 #ifdef PPP_FILTER 689 case PPPIOCSPASS: 690 case PPPIOCSACTIVE: 691 /* These are no longer supported. */ 692 return EOPNOTSUPP; 693 694 case PPPIOCSIPASS: 695 case PPPIOCSOPASS: 696 case PPPIOCSIACTIVE: 697 case PPPIOCSOACTIVE: 698 nbp = (struct bpf_program *) data; 699 if ((unsigned) nbp->bf_len > BPF_MAXINSNS) 700 return EINVAL; 701 newcodelen = nbp->bf_len * sizeof(struct bpf_insn); 702 if (newcodelen != 0) { 703 newcode = malloc(newcodelen, M_DEVBUF, M_WAITOK); 704 /* WAITOK -- malloc() never fails. */ 705 if ((error = copyin((caddr_t)nbp->bf_insns, (caddr_t)newcode, 706 newcodelen)) != 0) { 707 free(newcode, M_DEVBUF); 708 return error; 709 } 710 if (!bpf_validate(newcode, nbp->bf_len)) { 711 free(newcode, M_DEVBUF); 712 return EINVAL; 713 } 714 } else 715 newcode = 0; 716 switch (cmd) { 717 case PPPIOCSIPASS: 718 bp = &sc->sc_pass_filt_in; 719 break; 720 721 case PPPIOCSOPASS: 722 bp = &sc->sc_pass_filt_out; 723 break; 724 725 case PPPIOCSIACTIVE: 726 bp = &sc->sc_active_filt_in; 727 break; 728 729 case PPPIOCSOACTIVE: 730 bp = &sc->sc_active_filt_out; 731 break; 732 default: 733 free(newcode, M_DEVBUF); 734 return (EPASSTHROUGH); 735 } 736 oldcode = bp->bf_insns; 737 s = splnet(); 738 bp->bf_len = nbp->bf_len; 739 bp->bf_insns = newcode; 740 splx(s); 741 if (oldcode != 0) 742 free(oldcode, M_DEVBUF); 743 break; 744 #endif /* PPP_FILTER */ 745 746 default: 747 return (EPASSTHROUGH); 748 } 749 return (0); 750 } 751 752 /* 753 * Process an ioctl request to the ppp network interface. 754 */ 755 static int 756 pppsioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 757 { 758 struct lwp *l = curlwp; /* XXX */ 759 struct ppp_softc *sc = ifp->if_softc; 760 struct ifaddr *ifa = (struct ifaddr *)data; 761 struct ifreq *ifr = (struct ifreq *)data; 762 struct ppp_stats *psp; 763 #ifdef PPP_COMPRESS 764 struct ppp_comp_stats *pcp; 765 #endif 766 int s = splnet(), error = 0; 767 768 switch (cmd) { 769 case SIOCSIFFLAGS: 770 if ((ifp->if_flags & IFF_RUNNING) == 0) 771 ifp->if_flags &= ~IFF_UP; 772 break; 773 774 case SIOCSIFADDR: 775 switch (ifa->ifa_addr->sa_family) { 776 #ifdef INET 777 case AF_INET: 778 break; 779 #endif 780 #ifdef INET6 781 case AF_INET6: 782 break; 783 #endif 784 default: 785 error = EAFNOSUPPORT; 786 break; 787 } 788 break; 789 790 case SIOCSIFDSTADDR: 791 switch (ifa->ifa_addr->sa_family) { 792 #ifdef INET 793 case AF_INET: 794 break; 795 #endif 796 #ifdef INET6 797 case AF_INET6: 798 break; 799 #endif 800 default: 801 error = EAFNOSUPPORT; 802 break; 803 } 804 break; 805 806 case SIOCSIFMTU: 807 if ((error = kauth_authorize_network(l->l_cred, 808 KAUTH_NETWORK_INTERFACE, KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, 809 ifp, (void *)cmd, NULL) != 0)) 810 break; 811 sc->sc_if.if_mtu = ifr->ifr_mtu; 812 break; 813 814 case SIOCGIFMTU: 815 ifr->ifr_mtu = sc->sc_if.if_mtu; 816 break; 817 818 case SIOCADDMULTI: 819 case SIOCDELMULTI: 820 if (ifr == 0) { 821 error = EAFNOSUPPORT; 822 break; 823 } 824 switch (ifr->ifr_addr.sa_family) { 825 #ifdef INET 826 case AF_INET: 827 break; 828 #endif 829 #ifdef INET6 830 case AF_INET6: 831 break; 832 #endif 833 default: 834 error = EAFNOSUPPORT; 835 break; 836 } 837 break; 838 839 case SIOCGPPPSTATS: 840 psp = &((struct ifpppstatsreq *) data)->stats; 841 memset(psp, 0, sizeof(*psp)); 842 psp->p = sc->sc_stats; 843 #if defined(VJC) && !defined(SL_NO_STATS) 844 if (sc->sc_comp) { 845 psp->vj.vjs_packets = sc->sc_comp->sls_packets; 846 psp->vj.vjs_compressed = sc->sc_comp->sls_compressed; 847 psp->vj.vjs_searches = sc->sc_comp->sls_searches; 848 psp->vj.vjs_misses = sc->sc_comp->sls_misses; 849 psp->vj.vjs_uncompressedin = sc->sc_comp->sls_uncompressedin; 850 psp->vj.vjs_compressedin = sc->sc_comp->sls_compressedin; 851 psp->vj.vjs_errorin = sc->sc_comp->sls_errorin; 852 psp->vj.vjs_tossed = sc->sc_comp->sls_tossed; 853 } 854 #endif /* VJC */ 855 break; 856 857 #ifdef PPP_COMPRESS 858 case SIOCGPPPCSTATS: 859 pcp = &((struct ifpppcstatsreq *) data)->stats; 860 memset(pcp, 0, sizeof(*pcp)); 861 if (sc->sc_xc_state != NULL) 862 (*sc->sc_xcomp->comp_stat)(sc->sc_xc_state, &pcp->c); 863 if (sc->sc_rc_state != NULL) 864 (*sc->sc_rcomp->decomp_stat)(sc->sc_rc_state, &pcp->d); 865 break; 866 #endif /* PPP_COMPRESS */ 867 868 default: 869 error = EINVAL; 870 } 871 splx(s); 872 return (error); 873 } 874 875 /* 876 * Queue a packet. Start transmission if not active. 877 * Packet is placed in Information field of PPP frame. 878 */ 879 int 880 pppoutput(struct ifnet *ifp, struct mbuf *m0, struct sockaddr *dst, 881 struct rtentry *rtp) 882 { 883 struct ppp_softc *sc = ifp->if_softc; 884 int protocol, address, control; 885 u_char *cp; 886 int s, error; 887 #ifdef INET 888 struct ip *ip; 889 #endif 890 struct ifqueue *ifq; 891 enum NPmode mode; 892 int len; 893 ALTQ_DECL(struct altq_pktattr pktattr;) 894 895 if (sc->sc_devp == NULL || (ifp->if_flags & IFF_RUNNING) == 0 896 || ((ifp->if_flags & IFF_UP) == 0 && dst->sa_family != AF_UNSPEC)) { 897 error = ENETDOWN; /* sort of */ 898 goto bad; 899 } 900 901 IFQ_CLASSIFY(&ifp->if_snd, m0, dst->sa_family, &pktattr); 902 903 /* 904 * Compute PPP header. 905 */ 906 m0->m_flags &= ~M_HIGHPRI; 907 switch (dst->sa_family) { 908 #ifdef INET 909 case AF_INET: 910 address = PPP_ALLSTATIONS; 911 control = PPP_UI; 912 protocol = PPP_IP; 913 mode = sc->sc_npmode[NP_IP]; 914 915 /* 916 * If this packet has the "low delay" bit set in the IP header, 917 * put it on the fastq instead. 918 */ 919 ip = mtod(m0, struct ip *); 920 if (ip->ip_tos & IPTOS_LOWDELAY) 921 m0->m_flags |= M_HIGHPRI; 922 break; 923 #endif 924 #ifdef INET6 925 case AF_INET6: 926 address = PPP_ALLSTATIONS; /*XXX*/ 927 control = PPP_UI; /*XXX*/ 928 protocol = PPP_IPV6; 929 mode = sc->sc_npmode[NP_IPV6]; 930 931 #if 0 /* XXX flowinfo/traffic class, maybe? */ 932 /* 933 * If this packet has the "low delay" bit set in the IP header, 934 * put it on the fastq instead. 935 */ 936 ip = mtod(m0, struct ip *); 937 if (ip->ip_tos & IPTOS_LOWDELAY) 938 m0->m_flags |= M_HIGHPRI; 939 #endif 940 break; 941 #endif 942 case AF_UNSPEC: 943 address = PPP_ADDRESS(dst->sa_data); 944 control = PPP_CONTROL(dst->sa_data); 945 protocol = PPP_PROTOCOL(dst->sa_data); 946 mode = NPMODE_PASS; 947 break; 948 default: 949 printf("%s: af%d not supported\n", ifp->if_xname, dst->sa_family); 950 error = EAFNOSUPPORT; 951 goto bad; 952 } 953 954 /* 955 * Drop this packet, or return an error, if necessary. 956 */ 957 if (mode == NPMODE_ERROR) { 958 error = ENETDOWN; 959 goto bad; 960 } 961 if (mode == NPMODE_DROP) { 962 error = 0; 963 goto bad; 964 } 965 966 /* 967 * Add PPP header. 968 */ 969 M_PREPEND(m0, PPP_HDRLEN, M_DONTWAIT); 970 if (m0 == NULL) { 971 error = ENOBUFS; 972 goto bad; 973 } 974 975 cp = mtod(m0, u_char *); 976 *cp++ = address; 977 *cp++ = control; 978 *cp++ = protocol >> 8; 979 *cp++ = protocol & 0xff; 980 981 len = m_length(m0); 982 983 if (sc->sc_flags & SC_LOG_OUTPKT) { 984 printf("%s output: ", ifp->if_xname); 985 pppdumpm(m0); 986 } 987 988 if ((protocol & 0x8000) == 0) { 989 #ifdef PPP_FILTER 990 /* 991 * Apply the pass and active filters to the packet, 992 * but only if it is a data packet. 993 */ 994 if (sc->sc_pass_filt_out.bf_insns != 0 995 && bpf_filter(sc->sc_pass_filt_out.bf_insns, (u_char *) m0, 996 len, 0) == 0) { 997 error = 0; /* drop this packet */ 998 goto bad; 999 } 1000 1001 /* 1002 * Update the time we sent the most recent packet. 1003 */ 1004 if (sc->sc_active_filt_out.bf_insns == 0 1005 || bpf_filter(sc->sc_active_filt_out.bf_insns, (u_char *) m0, 1006 len, 0)) 1007 sc->sc_last_sent = time_second; 1008 #else 1009 /* 1010 * Update the time we sent the most recent packet. 1011 */ 1012 sc->sc_last_sent = time_second; 1013 #endif /* PPP_FILTER */ 1014 } 1015 1016 #if NBPFILTER > 0 1017 /* 1018 * See if bpf wants to look at the packet. 1019 */ 1020 if (sc->sc_if.if_bpf) 1021 bpf_mtap(sc->sc_if.if_bpf, m0); 1022 #endif 1023 1024 /* 1025 * Put the packet on the appropriate queue. 1026 */ 1027 s = splnet(); 1028 if (mode == NPMODE_QUEUE) { 1029 /* XXX we should limit the number of packets on this queue */ 1030 *sc->sc_npqtail = m0; 1031 m0->m_nextpkt = NULL; 1032 sc->sc_npqtail = &m0->m_nextpkt; 1033 } else { 1034 ifq = (m0->m_flags & M_HIGHPRI) ? &sc->sc_fastq : NULL; 1035 if ((error = ifq_enqueue2(&sc->sc_if, ifq, m0 1036 ALTQ_COMMA ALTQ_DECL(&pktattr))) != 0) { 1037 splx(s); 1038 sc->sc_if.if_oerrors++; 1039 sc->sc_stats.ppp_oerrors++; 1040 return (error); 1041 } 1042 ppp_restart(sc); 1043 } 1044 ifp->if_opackets++; 1045 ifp->if_obytes += len; 1046 1047 splx(s); 1048 return (0); 1049 1050 bad: 1051 m_freem(m0); 1052 return (error); 1053 } 1054 1055 /* 1056 * After a change in the NPmode for some NP, move packets from the 1057 * npqueue to the send queue or the fast queue as appropriate. 1058 * Should be called at splnet, since we muck with the queues. 1059 */ 1060 static void 1061 ppp_requeue(struct ppp_softc *sc) 1062 { 1063 struct mbuf *m, **mpp; 1064 struct ifqueue *ifq; 1065 enum NPmode mode; 1066 int error; 1067 1068 for (mpp = &sc->sc_npqueue; (m = *mpp) != NULL; ) { 1069 switch (PPP_PROTOCOL(mtod(m, u_char *))) { 1070 case PPP_IP: 1071 mode = sc->sc_npmode[NP_IP]; 1072 break; 1073 case PPP_IPV6: 1074 mode = sc->sc_npmode[NP_IPV6]; 1075 break; 1076 default: 1077 mode = NPMODE_PASS; 1078 } 1079 1080 switch (mode) { 1081 case NPMODE_PASS: 1082 /* 1083 * This packet can now go on one of the queues to be sent. 1084 */ 1085 *mpp = m->m_nextpkt; 1086 m->m_nextpkt = NULL; 1087 ifq = (m->m_flags & M_HIGHPRI) ? &sc->sc_fastq : NULL; 1088 if ((error = ifq_enqueue2(&sc->sc_if, ifq, m ALTQ_COMMA 1089 ALTQ_DECL(NULL))) != 0) { 1090 sc->sc_if.if_oerrors++; 1091 sc->sc_stats.ppp_oerrors++; 1092 } 1093 break; 1094 1095 case NPMODE_DROP: 1096 case NPMODE_ERROR: 1097 *mpp = m->m_nextpkt; 1098 m_freem(m); 1099 break; 1100 1101 case NPMODE_QUEUE: 1102 mpp = &m->m_nextpkt; 1103 break; 1104 } 1105 } 1106 sc->sc_npqtail = mpp; 1107 } 1108 1109 /* 1110 * Transmitter has finished outputting some stuff; 1111 * remember to call sc->sc_start later at splsoftnet. 1112 */ 1113 void 1114 ppp_restart(struct ppp_softc *sc) 1115 { 1116 int s = splhigh(); /* XXX IMP ME HARDER */ 1117 1118 sc->sc_flags &= ~SC_TBUSY; 1119 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1120 softintr_schedule(sc->sc_si); 1121 #else 1122 schednetisr(NETISR_PPP); 1123 #endif 1124 splx(s); 1125 } 1126 1127 /* 1128 * Get a packet to send. This procedure is intended to be called at 1129 * splsoftnet, since it may involve time-consuming operations such as 1130 * applying VJ compression, packet compression, address/control and/or 1131 * protocol field compression to the packet. 1132 */ 1133 struct mbuf * 1134 ppp_dequeue(struct ppp_softc *sc) 1135 { 1136 struct mbuf *m, *mp; 1137 u_char *cp; 1138 int address, control, protocol; 1139 int s; 1140 1141 /* 1142 * Grab a packet to send: first try the fast queue, then the 1143 * normal queue. 1144 */ 1145 s = splnet(); 1146 if (sc->sc_nfastq < sc->sc_maxfastq) { 1147 IF_DEQUEUE(&sc->sc_fastq, m); 1148 if (m != NULL) 1149 sc->sc_nfastq++; 1150 else 1151 IFQ_DEQUEUE(&sc->sc_if.if_snd, m); 1152 } else { 1153 sc->sc_nfastq = 0; 1154 IFQ_DEQUEUE(&sc->sc_if.if_snd, m); 1155 if (m == NULL) { 1156 IF_DEQUEUE(&sc->sc_fastq, m); 1157 if (m != NULL) 1158 sc->sc_nfastq++; 1159 } 1160 } 1161 splx(s); 1162 1163 if (m == NULL) 1164 return NULL; 1165 1166 ++sc->sc_stats.ppp_opackets; 1167 1168 /* 1169 * Extract the ppp header of the new packet. 1170 * The ppp header will be in one mbuf. 1171 */ 1172 cp = mtod(m, u_char *); 1173 address = PPP_ADDRESS(cp); 1174 control = PPP_CONTROL(cp); 1175 protocol = PPP_PROTOCOL(cp); 1176 1177 switch (protocol) { 1178 case PPP_IP: 1179 #ifdef VJC 1180 /* 1181 * If the packet is a TCP/IP packet, see if we can compress it. 1182 */ 1183 if ((sc->sc_flags & SC_COMP_TCP) && sc->sc_comp != NULL) { 1184 struct ip *ip; 1185 int type; 1186 1187 mp = m; 1188 ip = (struct ip *) (cp + PPP_HDRLEN); 1189 if (mp->m_len <= PPP_HDRLEN) { 1190 mp = mp->m_next; 1191 if (mp == NULL) 1192 break; 1193 ip = mtod(mp, struct ip *); 1194 } 1195 /* this code assumes the IP/TCP header is in one non-shared mbuf */ 1196 if (ip->ip_p == IPPROTO_TCP) { 1197 type = sl_compress_tcp(mp, ip, sc->sc_comp, 1198 !(sc->sc_flags & SC_NO_TCP_CCID)); 1199 switch (type) { 1200 case TYPE_UNCOMPRESSED_TCP: 1201 protocol = PPP_VJC_UNCOMP; 1202 break; 1203 case TYPE_COMPRESSED_TCP: 1204 protocol = PPP_VJC_COMP; 1205 cp = mtod(m, u_char *); 1206 cp[0] = address; /* header has moved */ 1207 cp[1] = control; 1208 cp[2] = 0; 1209 break; 1210 } 1211 cp[3] = protocol; /* update protocol in PPP header */ 1212 } 1213 } 1214 #endif /* VJC */ 1215 break; 1216 1217 #ifdef PPP_COMPRESS 1218 case PPP_CCP: 1219 ppp_ccp(sc, m, 0); 1220 break; 1221 #endif /* PPP_COMPRESS */ 1222 } 1223 1224 #ifdef PPP_COMPRESS 1225 if (protocol != PPP_LCP && protocol != PPP_CCP 1226 && sc->sc_xc_state && (sc->sc_flags & SC_COMP_RUN)) { 1227 struct mbuf *mcomp = NULL; 1228 int slen; 1229 1230 slen = 0; 1231 for (mp = m; mp != NULL; mp = mp->m_next) 1232 slen += mp->m_len; 1233 (*sc->sc_xcomp->compress) 1234 (sc->sc_xc_state, &mcomp, m, slen, sc->sc_if.if_mtu + PPP_HDRLEN); 1235 if (mcomp != NULL) { 1236 if (sc->sc_flags & SC_CCP_UP) { 1237 /* Send the compressed packet instead of the original. */ 1238 m_freem(m); 1239 m = mcomp; 1240 cp = mtod(m, u_char *); 1241 protocol = cp[3]; 1242 } else { 1243 /* Can't transmit compressed packets until CCP is up. */ 1244 m_freem(mcomp); 1245 } 1246 } 1247 } 1248 #endif /* PPP_COMPRESS */ 1249 1250 /* 1251 * Compress the address/control and protocol, if possible. 1252 */ 1253 if (sc->sc_flags & SC_COMP_AC && address == PPP_ALLSTATIONS && 1254 control == PPP_UI && protocol != PPP_ALLSTATIONS && 1255 protocol != PPP_LCP) { 1256 /* can compress address/control */ 1257 m->m_data += 2; 1258 m->m_len -= 2; 1259 } 1260 if (sc->sc_flags & SC_COMP_PROT && protocol < 0xFF) { 1261 /* can compress protocol */ 1262 if (mtod(m, u_char *) == cp) { 1263 cp[2] = cp[1]; /* move address/control up */ 1264 cp[1] = cp[0]; 1265 } 1266 ++m->m_data; 1267 --m->m_len; 1268 } 1269 1270 return m; 1271 } 1272 1273 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1274 void 1275 pppnetisr(void) 1276 { 1277 struct ppp_softc *sc; 1278 1279 for (sc = LIST_FIRST(&ppp_softc_list); sc != NULL; 1280 sc = LIST_NEXT(sc, sc_iflist)) 1281 pppintr(sc); 1282 } 1283 #endif 1284 1285 /* 1286 * Software interrupt routine, called at splsoftnet. 1287 */ 1288 static void 1289 pppintr(void *arg) 1290 { 1291 struct ppp_softc *sc = arg; 1292 struct mbuf *m; 1293 int s; 1294 1295 if (!(sc->sc_flags & SC_TBUSY) 1296 && (IFQ_IS_EMPTY(&sc->sc_if.if_snd) == 0 || sc->sc_fastq.ifq_head 1297 || sc->sc_outm)) { 1298 s = splhigh(); /* XXX IMP ME HARDER */ 1299 sc->sc_flags |= SC_TBUSY; 1300 splx(s); 1301 (*sc->sc_start)(sc); 1302 } 1303 for (;;) { 1304 s = splnet(); 1305 IF_DEQUEUE(&sc->sc_rawq, m); 1306 splx(s); 1307 if (m == NULL) 1308 break; 1309 ppp_inproc(sc, m); 1310 } 1311 } 1312 1313 #ifdef PPP_COMPRESS 1314 /* 1315 * Handle a CCP packet. `rcvd' is 1 if the packet was received, 1316 * 0 if it is about to be transmitted. 1317 */ 1318 static void 1319 ppp_ccp(struct ppp_softc *sc, struct mbuf *m, int rcvd) 1320 { 1321 u_char *dp, *ep; 1322 struct mbuf *mp; 1323 int slen, s; 1324 1325 /* 1326 * Get a pointer to the data after the PPP header. 1327 */ 1328 if (m->m_len <= PPP_HDRLEN) { 1329 mp = m->m_next; 1330 if (mp == NULL) 1331 return; 1332 dp = (mp != NULL)? mtod(mp, u_char *): NULL; 1333 } else { 1334 mp = m; 1335 dp = mtod(mp, u_char *) + PPP_HDRLEN; 1336 } 1337 1338 ep = mtod(mp, u_char *) + mp->m_len; 1339 if (dp + CCP_HDRLEN > ep) 1340 return; 1341 slen = CCP_LENGTH(dp); 1342 if (dp + slen > ep) { 1343 if (sc->sc_flags & SC_DEBUG) 1344 printf("if_ppp/ccp: not enough data in mbuf (%p+%x > %p+%x)\n", 1345 dp, slen, mtod(mp, u_char *), mp->m_len); 1346 return; 1347 } 1348 1349 switch (CCP_CODE(dp)) { 1350 case CCP_CONFREQ: 1351 case CCP_TERMREQ: 1352 case CCP_TERMACK: 1353 /* CCP must be going down - disable compression */ 1354 if (sc->sc_flags & SC_CCP_UP) { 1355 s = splhigh(); /* XXX IMP ME HARDER */ 1356 sc->sc_flags &= ~(SC_CCP_UP | SC_COMP_RUN | SC_DECOMP_RUN); 1357 splx(s); 1358 } 1359 break; 1360 1361 case CCP_CONFACK: 1362 if (sc->sc_flags & SC_CCP_OPEN && !(sc->sc_flags & SC_CCP_UP) 1363 && slen >= CCP_HDRLEN + CCP_OPT_MINLEN 1364 && slen >= CCP_OPT_LENGTH(dp + CCP_HDRLEN) + CCP_HDRLEN) { 1365 if (!rcvd) { 1366 /* we're agreeing to send compressed packets. */ 1367 if (sc->sc_xc_state != NULL 1368 && (*sc->sc_xcomp->comp_init) 1369 (sc->sc_xc_state, dp + CCP_HDRLEN, slen - CCP_HDRLEN, 1370 sc->sc_unit, 0, sc->sc_flags & SC_DEBUG)) { 1371 s = splhigh(); /* XXX IMP ME HARDER */ 1372 sc->sc_flags |= SC_COMP_RUN; 1373 splx(s); 1374 } 1375 } else { 1376 /* peer is agreeing to send compressed packets. */ 1377 if (sc->sc_rc_state != NULL 1378 && (*sc->sc_rcomp->decomp_init) 1379 (sc->sc_rc_state, dp + CCP_HDRLEN, slen - CCP_HDRLEN, 1380 sc->sc_unit, 0, sc->sc_mru, 1381 sc->sc_flags & SC_DEBUG)) { 1382 s = splhigh(); /* XXX IMP ME HARDER */ 1383 sc->sc_flags |= SC_DECOMP_RUN; 1384 sc->sc_flags &= ~(SC_DC_ERROR | SC_DC_FERROR); 1385 splx(s); 1386 } 1387 } 1388 } 1389 break; 1390 1391 case CCP_RESETACK: 1392 if (sc->sc_flags & SC_CCP_UP) { 1393 if (!rcvd) { 1394 if (sc->sc_xc_state && (sc->sc_flags & SC_COMP_RUN)) 1395 (*sc->sc_xcomp->comp_reset)(sc->sc_xc_state); 1396 } else { 1397 if (sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN)) { 1398 (*sc->sc_rcomp->decomp_reset)(sc->sc_rc_state); 1399 s = splhigh(); /* XXX IMP ME HARDER */ 1400 sc->sc_flags &= ~SC_DC_ERROR; 1401 splx(s); 1402 } 1403 } 1404 } 1405 break; 1406 } 1407 } 1408 1409 /* 1410 * CCP is down; free (de)compressor state if necessary. 1411 */ 1412 static void 1413 ppp_ccp_closed(struct ppp_softc *sc) 1414 { 1415 if (sc->sc_xc_state) { 1416 (*sc->sc_xcomp->comp_free)(sc->sc_xc_state); 1417 sc->sc_xc_state = NULL; 1418 } 1419 if (sc->sc_rc_state) { 1420 (*sc->sc_rcomp->decomp_free)(sc->sc_rc_state); 1421 sc->sc_rc_state = NULL; 1422 } 1423 } 1424 #endif /* PPP_COMPRESS */ 1425 1426 /* 1427 * PPP packet input routine. 1428 * The caller has checked and removed the FCS and has inserted 1429 * the address/control bytes and the protocol high byte if they 1430 * were omitted. 1431 */ 1432 void 1433 ppppktin(struct ppp_softc *sc, struct mbuf *m, int lost) 1434 { 1435 int s = splhigh(); /* XXX IMP ME HARDER */ 1436 1437 if (lost) 1438 m->m_flags |= M_ERRMARK; 1439 IF_ENQUEUE(&sc->sc_rawq, m); 1440 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1441 softintr_schedule(sc->sc_si); 1442 #else 1443 schednetisr(NETISR_PPP); 1444 #endif 1445 splx(s); 1446 } 1447 1448 /* 1449 * Process a received PPP packet, doing decompression as necessary. 1450 * Should be called at splsoftnet. 1451 */ 1452 #define COMPTYPE(proto) ((proto) == PPP_VJC_COMP? TYPE_COMPRESSED_TCP: \ 1453 TYPE_UNCOMPRESSED_TCP) 1454 1455 static void 1456 ppp_inproc(struct ppp_softc *sc, struct mbuf *m) 1457 { 1458 struct ifnet *ifp = &sc->sc_if; 1459 struct ifqueue *inq; 1460 int s, ilen, proto, rv; 1461 u_char *cp, adrs, ctrl; 1462 struct mbuf *mp, *dmp = NULL; 1463 #ifdef VJC 1464 int xlen; 1465 u_char *iphdr; 1466 u_int hlen; 1467 #endif 1468 1469 sc->sc_stats.ppp_ipackets++; 1470 1471 if (sc->sc_flags & SC_LOG_INPKT) { 1472 ilen = 0; 1473 for (mp = m; mp != NULL; mp = mp->m_next) 1474 ilen += mp->m_len; 1475 printf("%s: got %d bytes\n", ifp->if_xname, ilen); 1476 pppdumpm(m); 1477 } 1478 1479 cp = mtod(m, u_char *); 1480 adrs = PPP_ADDRESS(cp); 1481 ctrl = PPP_CONTROL(cp); 1482 proto = PPP_PROTOCOL(cp); 1483 1484 if (m->m_flags & M_ERRMARK) { 1485 m->m_flags &= ~M_ERRMARK; 1486 s = splhigh(); /* XXX IMP ME HARDER */ 1487 sc->sc_flags |= SC_VJ_RESET; 1488 splx(s); 1489 } 1490 1491 #ifdef PPP_COMPRESS 1492 /* 1493 * Decompress this packet if necessary, update the receiver's 1494 * dictionary, or take appropriate action on a CCP packet. 1495 */ 1496 if (proto == PPP_COMP && sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN) 1497 && !(sc->sc_flags & SC_DC_ERROR) && !(sc->sc_flags & SC_DC_FERROR)) { 1498 /* decompress this packet */ 1499 rv = (*sc->sc_rcomp->decompress)(sc->sc_rc_state, m, &dmp); 1500 if (rv == DECOMP_OK) { 1501 m_freem(m); 1502 if (dmp == NULL) { 1503 /* no error, but no decompressed packet produced */ 1504 return; 1505 } 1506 m = dmp; 1507 cp = mtod(m, u_char *); 1508 proto = PPP_PROTOCOL(cp); 1509 1510 } else { 1511 /* 1512 * An error has occurred in decompression. 1513 * Pass the compressed packet up to pppd, which may take 1514 * CCP down or issue a Reset-Req. 1515 */ 1516 if (sc->sc_flags & SC_DEBUG) 1517 printf("%s: decompress failed %d\n", ifp->if_xname, rv); 1518 s = splhigh(); /* XXX IMP ME HARDER */ 1519 sc->sc_flags |= SC_VJ_RESET; 1520 if (rv == DECOMP_ERROR) 1521 sc->sc_flags |= SC_DC_ERROR; 1522 else 1523 sc->sc_flags |= SC_DC_FERROR; 1524 splx(s); 1525 } 1526 1527 } else { 1528 if (sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN)) { 1529 (*sc->sc_rcomp->incomp)(sc->sc_rc_state, m); 1530 } 1531 if (proto == PPP_CCP) { 1532 ppp_ccp(sc, m, 1); 1533 } 1534 } 1535 #endif 1536 1537 ilen = 0; 1538 for (mp = m; mp != NULL; mp = mp->m_next) 1539 ilen += mp->m_len; 1540 1541 #ifdef VJC 1542 if (sc->sc_flags & SC_VJ_RESET) { 1543 /* 1544 * If we've missed a packet, we must toss subsequent compressed 1545 * packets which don't have an explicit connection ID. 1546 */ 1547 if (sc->sc_comp) 1548 sl_uncompress_tcp(NULL, 0, TYPE_ERROR, sc->sc_comp); 1549 s = splhigh(); /* XXX IMP ME HARDER */ 1550 sc->sc_flags &= ~SC_VJ_RESET; 1551 splx(s); 1552 } 1553 1554 /* 1555 * See if we have a VJ-compressed packet to uncompress. 1556 */ 1557 if (proto == PPP_VJC_COMP) { 1558 if ((sc->sc_flags & SC_REJ_COMP_TCP) || sc->sc_comp == 0) 1559 goto bad; 1560 1561 xlen = sl_uncompress_tcp_core(cp + PPP_HDRLEN, m->m_len - PPP_HDRLEN, 1562 ilen - PPP_HDRLEN, TYPE_COMPRESSED_TCP, 1563 sc->sc_comp, &iphdr, &hlen); 1564 1565 if (xlen <= 0) { 1566 if (sc->sc_flags & SC_DEBUG) 1567 printf("%s: VJ uncompress failed on type comp\n", 1568 ifp->if_xname); 1569 goto bad; 1570 } 1571 1572 /* Copy the PPP and IP headers into a new mbuf. */ 1573 MGETHDR(mp, M_DONTWAIT, MT_DATA); 1574 if (mp == NULL) 1575 goto bad; 1576 mp->m_len = 0; 1577 mp->m_next = NULL; 1578 if (hlen + PPP_HDRLEN > MHLEN) { 1579 MCLGET(mp, M_DONTWAIT); 1580 if (M_TRAILINGSPACE(mp) < hlen + PPP_HDRLEN) { 1581 m_freem(mp); 1582 goto bad; /* lose if big headers and no clusters */ 1583 } 1584 } 1585 cp = mtod(mp, u_char *); 1586 cp[0] = adrs; 1587 cp[1] = ctrl; 1588 cp[2] = 0; 1589 cp[3] = PPP_IP; 1590 proto = PPP_IP; 1591 bcopy(iphdr, cp + PPP_HDRLEN, hlen); 1592 mp->m_len = hlen + PPP_HDRLEN; 1593 1594 /* 1595 * Trim the PPP and VJ headers off the old mbuf 1596 * and stick the new and old mbufs together. 1597 */ 1598 m->m_data += PPP_HDRLEN + xlen; 1599 m->m_len -= PPP_HDRLEN + xlen; 1600 if (m->m_len <= M_TRAILINGSPACE(mp)) { 1601 bcopy(mtod(m, u_char *), mtod(mp, u_char *) + mp->m_len, m->m_len); 1602 mp->m_len += m->m_len; 1603 MFREE(m, mp->m_next); 1604 } else 1605 mp->m_next = m; 1606 m = mp; 1607 ilen += hlen - xlen; 1608 1609 } else if (proto == PPP_VJC_UNCOMP) { 1610 if ((sc->sc_flags & SC_REJ_COMP_TCP) || sc->sc_comp == 0) 1611 goto bad; 1612 1613 xlen = sl_uncompress_tcp_core(cp + PPP_HDRLEN, m->m_len - PPP_HDRLEN, 1614 ilen - PPP_HDRLEN, TYPE_UNCOMPRESSED_TCP, 1615 sc->sc_comp, &iphdr, &hlen); 1616 1617 if (xlen < 0) { 1618 if (sc->sc_flags & SC_DEBUG) 1619 printf("%s: VJ uncompress failed on type uncomp\n", 1620 ifp->if_xname); 1621 goto bad; 1622 } 1623 1624 proto = PPP_IP; 1625 cp[3] = PPP_IP; 1626 } 1627 #endif /* VJC */ 1628 1629 /* 1630 * If the packet will fit in a header mbuf, don't waste a 1631 * whole cluster on it. 1632 */ 1633 if (ilen <= MHLEN && M_IS_CLUSTER(m)) { 1634 MGETHDR(mp, M_DONTWAIT, MT_DATA); 1635 if (mp != NULL) { 1636 m_copydata(m, 0, ilen, mtod(mp, caddr_t)); 1637 m_freem(m); 1638 m = mp; 1639 m->m_len = ilen; 1640 } 1641 } 1642 m->m_pkthdr.len = ilen; 1643 m->m_pkthdr.rcvif = ifp; 1644 1645 if ((proto & 0x8000) == 0) { 1646 #ifdef PPP_FILTER 1647 /* 1648 * See whether we want to pass this packet, and 1649 * if it counts as link activity. 1650 */ 1651 if (sc->sc_pass_filt_in.bf_insns != 0 1652 && bpf_filter(sc->sc_pass_filt_in.bf_insns, (u_char *) m, 1653 ilen, 0) == 0) { 1654 /* drop this packet */ 1655 m_freem(m); 1656 return; 1657 } 1658 if (sc->sc_active_filt_in.bf_insns == 0 1659 || bpf_filter(sc->sc_active_filt_in.bf_insns, (u_char *) m, 1660 ilen, 0)) 1661 sc->sc_last_recv = time_second; 1662 #else 1663 /* 1664 * Record the time that we received this packet. 1665 */ 1666 sc->sc_last_recv = time_second; 1667 #endif /* PPP_FILTER */ 1668 } 1669 1670 #if NBPFILTER > 0 1671 /* See if bpf wants to look at the packet. */ 1672 if (sc->sc_if.if_bpf) 1673 bpf_mtap(sc->sc_if.if_bpf, m); 1674 #endif 1675 1676 rv = 0; 1677 switch (proto) { 1678 #ifdef INET 1679 case PPP_IP: 1680 /* 1681 * IP packet - take off the ppp header and pass it up to IP. 1682 */ 1683 if ((ifp->if_flags & IFF_UP) == 0 1684 || sc->sc_npmode[NP_IP] != NPMODE_PASS) { 1685 /* interface is down - drop the packet. */ 1686 m_freem(m); 1687 return; 1688 } 1689 m->m_pkthdr.len -= PPP_HDRLEN; 1690 m->m_data += PPP_HDRLEN; 1691 m->m_len -= PPP_HDRLEN; 1692 #ifdef GATEWAY 1693 if (ipflow_fastforward(m)) 1694 return; 1695 #endif 1696 schednetisr(NETISR_IP); 1697 inq = &ipintrq; 1698 break; 1699 #endif 1700 1701 #ifdef INET6 1702 case PPP_IPV6: 1703 /* 1704 * IPv6 packet - take off the ppp header and pass it up to IPv6. 1705 */ 1706 if ((ifp->if_flags & IFF_UP) == 0 1707 || sc->sc_npmode[NP_IPV6] != NPMODE_PASS) { 1708 /* interface is down - drop the packet. */ 1709 m_freem(m); 1710 return; 1711 } 1712 m->m_pkthdr.len -= PPP_HDRLEN; 1713 m->m_data += PPP_HDRLEN; 1714 m->m_len -= PPP_HDRLEN; 1715 schednetisr(NETISR_IPV6); 1716 inq = &ip6intrq; 1717 break; 1718 #endif 1719 1720 default: 1721 /* 1722 * Some other protocol - place on input queue for read(). 1723 */ 1724 inq = &sc->sc_inq; 1725 rv = 1; 1726 break; 1727 } 1728 1729 /* 1730 * Put the packet on the appropriate input queue. 1731 */ 1732 s = splnet(); 1733 if (IF_QFULL(inq)) { 1734 IF_DROP(inq); 1735 splx(s); 1736 if (sc->sc_flags & SC_DEBUG) 1737 printf("%s: input queue full\n", ifp->if_xname); 1738 ifp->if_iqdrops++; 1739 goto bad; 1740 } 1741 IF_ENQUEUE(inq, m); 1742 splx(s); 1743 ifp->if_ipackets++; 1744 ifp->if_ibytes += ilen; 1745 1746 if (rv) 1747 (*sc->sc_ctlp)(sc); 1748 1749 return; 1750 1751 bad: 1752 m_freem(m); 1753 sc->sc_if.if_ierrors++; 1754 sc->sc_stats.ppp_ierrors++; 1755 } 1756 1757 #define MAX_DUMP_BYTES 128 1758 1759 static void 1760 pppdumpm(struct mbuf *m0) 1761 { 1762 char buf[3*MAX_DUMP_BYTES+4]; 1763 char *bp = buf; 1764 struct mbuf *m; 1765 1766 for (m = m0; m; m = m->m_next) { 1767 int l = m->m_len; 1768 u_char *rptr = (u_char *)m->m_data; 1769 1770 while (l--) { 1771 if (bp > buf + sizeof(buf) - 4) 1772 goto done; 1773 *bp++ = hexdigits[*rptr >> 4]; /* convert byte to ascii hex */ 1774 *bp++ = hexdigits[*rptr++ & 0xf]; 1775 } 1776 1777 if (m->m_next) { 1778 if (bp > buf + sizeof(buf) - 3) 1779 goto done; 1780 *bp++ = '|'; 1781 } else 1782 *bp++ = ' '; 1783 } 1784 done: 1785 if (m) 1786 *bp++ = '>'; 1787 *bp = 0; 1788 printf("%s\n", buf); 1789 } 1790 1791 #ifdef ALTQ 1792 /* 1793 * a wrapper to transmit a packet from if_start since ALTQ uses 1794 * if_start to send a packet. 1795 */ 1796 static void 1797 ppp_ifstart(struct ifnet *ifp) 1798 { 1799 struct ppp_softc *sc; 1800 1801 sc = ifp->if_softc; 1802 (*sc->sc_start)(sc); 1803 } 1804 #endif 1805
Indexes created Tue Sep 23 07:09:52 GMT 2025