if_ppp.c revision 1.67.2.8
1 /* $NetBSD: if_ppp.c,v 1.67.2.8 2002/06/24 22:11:32 nathanw 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) 1989 Carnegie Mellon University. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms are permitted 11 * provided that the above copyright notice and this paragraph are 12 * duplicated in all such forms and that any documentation, 13 * advertising materials, and other materials related to such 14 * distribution and use acknowledge that the software was developed 15 * by Carnegie Mellon University. The name of the 16 * University may not be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 20 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 21 * 22 * Drew D. Perkins 23 * Carnegie Mellon University 24 * 4910 Forbes Ave. 25 * Pittsburgh, PA 15213 26 * (412) 268-8576 27 * ddp (at) andrew.cmu.edu 28 * 29 * Based on: 30 * @(#)if_sl.c 7.6.1.2 (Berkeley) 2/15/89 31 * 32 * Copyright (c) 1987 Regents of the University of California. 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms are permitted 36 * provided that the above copyright notice and this paragraph are 37 * duplicated in all such forms and that any documentation, 38 * advertising materials, and other materials related to such 39 * distribution and use acknowledge that the software was developed 40 * by the University of California, Berkeley. The name of the 41 * University may not be used to endorse or promote products derived 42 * from this software without specific prior written permission. 43 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 44 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 45 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 46 * 47 * Serial Line interface 48 * 49 * Rick Adams 50 * Center for Seismic Studies 51 * 1300 N 17th Street, Suite 1450 52 * Arlington, Virginia 22209 53 * (703)276-7900 54 * rick (at) seismo.ARPA 55 * seismo!rick 56 * 57 * Pounded on heavily by Chris Torek (chris (at) mimsy.umd.edu, umcp-cs!chris). 58 * Converted to 4.3BSD Beta by Chris Torek. 59 * Other changes made at Berkeley, based in part on code by Kirk Smith. 60 * 61 * Converted to 4.3BSD+ 386BSD by Brad Parker (brad (at) cayman.com) 62 * Added VJ tcp header compression; more unified ioctls 63 * 64 * Extensively modified by Paul Mackerras (paulus (at) cs.anu.edu.au). 65 * Cleaned up a lot of the mbuf-related code to fix bugs that 66 * caused system crashes and packet corruption. Changed pppstart 67 * so that it doesn't just give up with a collision if the whole 68 * packet doesn't fit in the output ring buffer. 69 * 70 * Added priority queueing for interactive IP packets, following 71 * the model of if_sl.c, plus hooks for bpf. 72 * Paul Mackerras (paulus (at) cs.anu.edu.au). 73 */ 74 75 /* from if_sl.c,v 1.11 84/10/04 12:54:47 rick Exp */ 76 /* from NetBSD: if_ppp.c,v 1.15.2.2 1994/07/28 05:17:58 cgd Exp */ 77 78 /* 79 * XXX IMP ME HARDER 80 * 81 * This is an explanation of that comment. This code used to use 82 * splimp() to block both network and tty interrupts. However, 83 * that call is deprecated. So, we have replaced the uses of 84 * splimp() with splhigh() in order to applomplish what it needs 85 * to accomplish, and added that happy little comment. 86 */ 87 88 #include <sys/cdefs.h> 89 __KERNEL_RCSID(0, "$NetBSD: if_ppp.c,v 1.67.2.8 2002/06/24 22:11:32 nathanw Exp $"); 90 91 #include "ppp.h" 92 93 #include "opt_inet.h" 94 #include "opt_gateway.h" 95 #include "opt_ppp.h" 96 97 #ifdef INET 98 #define VJC 99 #endif 100 #define PPP_COMPRESS 101 102 #include <sys/param.h> 103 #include <sys/lwp.h> 104 #include <sys/proc.h> 105 #include <sys/mbuf.h> 106 #include <sys/socket.h> 107 #include <sys/ioctl.h> 108 #include <sys/kernel.h> 109 #include <sys/systm.h> 110 #include <sys/time.h> 111 #include <sys/malloc.h> 112 113 #include <net/if.h> 114 #include <net/if_types.h> 115 #include <net/netisr.h> 116 #include <net/route.h> 117 #ifdef PPP_FILTER 118 #include <net/bpf.h> 119 #endif 120 121 #include <machine/intr.h> 122 123 #include <netinet/in.h> 124 #include <netinet/in_systm.h> 125 #include <netinet/in_var.h> 126 #ifdef INET 127 #include <netinet/ip.h> 128 #endif 129 130 #include "bpfilter.h" 131 #if NBPFILTER > 0 132 #include <sys/time.h> 133 #include <net/bpf.h> 134 #endif 135 136 #if defined(PPP_FILTER) || NBPFILTER > 0 137 #include <net/slip.h> 138 #endif 139 140 #ifdef VJC 141 #include <net/slcompress.h> 142 #endif 143 144 #include <net/ppp_defs.h> 145 #include <net/if_ppp.h> 146 #include <net/if_pppvar.h> 147 #include <machine/cpu.h> 148 149 #ifdef PPP_COMPRESS 150 #define PACKETPTR struct mbuf * 151 #include <net/ppp-comp.h> 152 #endif 153 154 static int pppsioctl __P((struct ifnet *, u_long, caddr_t)); 155 static void ppp_requeue __P((struct ppp_softc *)); 156 static void ppp_ccp __P((struct ppp_softc *, struct mbuf *m, int rcvd)); 157 static void ppp_ccp_closed __P((struct ppp_softc *)); 158 static void ppp_inproc __P((struct ppp_softc *, struct mbuf *)); 159 static void pppdumpm __P((struct mbuf *m0)); 160 #ifdef ALTQ 161 static void ppp_ifstart __P((struct ifnet *ifp)); 162 #endif 163 164 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 165 void pppnetisr(void); 166 #endif 167 void pppintr(void *); 168 169 /* 170 * Some useful mbuf macros not in mbuf.h. 171 */ 172 #define M_IS_CLUSTER(m) ((m)->m_flags & M_EXT) 173 174 #define M_DATASTART(m) \ 175 (M_IS_CLUSTER(m) ? (m)->m_ext.ext_buf : \ 176 (m)->m_flags & M_PKTHDR ? (m)->m_pktdat : (m)->m_dat) 177 178 #define M_DATASIZE(m) \ 179 (M_IS_CLUSTER(m) ? (m)->m_ext.ext_size : \ 180 (m)->m_flags & M_PKTHDR ? MHLEN: MLEN) 181 182 /* 183 * We define two link layer specific mbuf flags, to mark high-priority 184 * packets for output, and received packets following lost/corrupted 185 * packets. 186 */ 187 #define M_HIGHPRI M_LINK0 /* output packet for sc_fastq */ 188 #define M_ERRMARK M_LINK1 /* rx packet following lost/corrupted pkt */ 189 190 struct ppp_softc ppp_softc[NPPP]; 191 192 #ifdef PPP_COMPRESS 193 /* 194 * List of compressors we know about. 195 * We leave some space so maybe we can modload compressors. 196 */ 197 198 extern struct compressor ppp_bsd_compress; 199 extern struct compressor ppp_deflate, ppp_deflate_draft; 200 201 struct compressor *ppp_compressors[8] = { 202 #if DO_BSD_COMPRESS && defined(PPP_BSDCOMP) 203 &ppp_bsd_compress, 204 #endif 205 #if DO_DEFLATE && defined(PPP_DEFLATE) 206 &ppp_deflate, 207 &ppp_deflate_draft, 208 #endif 209 NULL 210 }; 211 #endif /* PPP_COMPRESS */ 212 213 214 /* 215 * Called from boot code to establish ppp interfaces. 216 */ 217 void 218 pppattach() 219 { 220 struct ppp_softc *sc; 221 int i = 0; 222 223 for (sc = ppp_softc; i < NPPP; sc++) { 224 sc->sc_unit = i; /* XXX */ 225 sprintf(sc->sc_if.if_xname, "ppp%d", i++); 226 callout_init(&sc->sc_timo_ch); 227 sc->sc_if.if_softc = sc; 228 sc->sc_if.if_mtu = PPP_MTU; 229 sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST; 230 sc->sc_if.if_type = IFT_PPP; 231 sc->sc_if.if_hdrlen = PPP_HDRLEN; 232 sc->sc_if.if_dlt = DLT_NULL; 233 sc->sc_if.if_ioctl = pppsioctl; 234 sc->sc_if.if_output = pppoutput; 235 #ifdef ALTQ 236 sc->sc_if.if_start = ppp_ifstart; 237 #endif 238 IFQ_SET_MAXLEN(&sc->sc_if.if_snd, IFQ_MAXLEN); 239 sc->sc_inq.ifq_maxlen = IFQ_MAXLEN; 240 sc->sc_fastq.ifq_maxlen = IFQ_MAXLEN; 241 sc->sc_rawq.ifq_maxlen = IFQ_MAXLEN; 242 IFQ_SET_READY(&sc->sc_if.if_snd); 243 if_attach(&sc->sc_if); 244 if_alloc_sadl(&sc->sc_if); 245 #if NBPFILTER > 0 246 bpfattach(&sc->sc_if, DLT_NULL, 0); 247 #endif 248 } 249 } 250 251 /* 252 * Allocate a ppp interface unit and initialize it. 253 */ 254 struct ppp_softc * 255 pppalloc(pid) 256 pid_t pid; 257 { 258 int nppp, i; 259 struct ppp_softc *sc; 260 261 for (nppp = 0, sc = ppp_softc; nppp < NPPP; nppp++, sc++) 262 if (sc->sc_xfer == pid) { 263 sc->sc_xfer = 0; 264 return sc; 265 } 266 for (nppp = 0, sc = ppp_softc; nppp < NPPP; nppp++, sc++) 267 if (sc->sc_devp == NULL) 268 break; 269 if (nppp >= NPPP) 270 return NULL; 271 272 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 273 sc->sc_si = softintr_establish(IPL_SOFTNET, pppintr, sc); 274 if (sc->sc_si == NULL) { 275 printf("ppp%d: unable to establish softintr\n", sc->sc_unit); 276 return (NULL); 277 } 278 #endif 279 280 sc->sc_flags = 0; 281 sc->sc_mru = PPP_MRU; 282 sc->sc_relinq = NULL; 283 memset((char *)&sc->sc_stats, 0, sizeof(sc->sc_stats)); 284 #ifdef VJC 285 MALLOC(sc->sc_comp, struct slcompress *, sizeof(struct slcompress), 286 M_DEVBUF, M_NOWAIT); 287 if (sc->sc_comp) 288 sl_compress_init(sc->sc_comp); 289 #endif 290 #ifdef PPP_COMPRESS 291 sc->sc_xc_state = NULL; 292 sc->sc_rc_state = NULL; 293 #endif /* PPP_COMPRESS */ 294 for (i = 0; i < NUM_NP; ++i) 295 sc->sc_npmode[i] = NPMODE_ERROR; 296 sc->sc_npqueue = NULL; 297 sc->sc_npqtail = &sc->sc_npqueue; 298 sc->sc_last_sent = sc->sc_last_recv = time.tv_sec; 299 300 return sc; 301 } 302 303 /* 304 * Deallocate a ppp unit. Must be called at splsoftnet or higher. 305 */ 306 void 307 pppdealloc(sc) 308 struct ppp_softc *sc; 309 { 310 struct mbuf *m; 311 312 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 313 softintr_disestablish(sc->sc_si); 314 #endif 315 if_down(&sc->sc_if); 316 sc->sc_if.if_flags &= ~(IFF_UP|IFF_RUNNING); 317 sc->sc_devp = NULL; 318 sc->sc_xfer = 0; 319 for (;;) { 320 IF_DEQUEUE(&sc->sc_rawq, m); 321 if (m == NULL) 322 break; 323 m_freem(m); 324 } 325 for (;;) { 326 IF_DEQUEUE(&sc->sc_inq, m); 327 if (m == NULL) 328 break; 329 m_freem(m); 330 } 331 for (;;) { 332 IF_DEQUEUE(&sc->sc_fastq, m); 333 if (m == NULL) 334 break; 335 m_freem(m); 336 } 337 while ((m = sc->sc_npqueue) != NULL) { 338 sc->sc_npqueue = m->m_nextpkt; 339 m_freem(m); 340 } 341 if (sc->sc_togo != NULL) { 342 m_freem(sc->sc_togo); 343 sc->sc_togo = NULL; 344 } 345 #ifdef PPP_COMPRESS 346 ppp_ccp_closed(sc); 347 sc->sc_xc_state = NULL; 348 sc->sc_rc_state = NULL; 349 #endif /* PPP_COMPRESS */ 350 #ifdef PPP_FILTER 351 if (sc->sc_pass_filt_in.bf_insns != 0) { 352 FREE(sc->sc_pass_filt_in.bf_insns, M_DEVBUF); 353 sc->sc_pass_filt_in.bf_insns = 0; 354 sc->sc_pass_filt_in.bf_len = 0; 355 } 356 if (sc->sc_pass_filt_out.bf_insns != 0) { 357 FREE(sc->sc_pass_filt_out.bf_insns, M_DEVBUF); 358 sc->sc_pass_filt_out.bf_insns = 0; 359 sc->sc_pass_filt_out.bf_len = 0; 360 } 361 if (sc->sc_active_filt_in.bf_insns != 0) { 362 FREE(sc->sc_active_filt_in.bf_insns, M_DEVBUF); 363 sc->sc_active_filt_in.bf_insns = 0; 364 sc->sc_active_filt_in.bf_len = 0; 365 } 366 if (sc->sc_active_filt_out.bf_insns != 0) { 367 FREE(sc->sc_active_filt_out.bf_insns, M_DEVBUF); 368 sc->sc_active_filt_out.bf_insns = 0; 369 sc->sc_active_filt_out.bf_len = 0; 370 } 371 #endif /* PPP_FILTER */ 372 #ifdef VJC 373 if (sc->sc_comp != 0) { 374 FREE(sc->sc_comp, M_DEVBUF); 375 sc->sc_comp = 0; 376 } 377 #endif 378 } 379 380 /* 381 * Ioctl routine for generic ppp devices. 382 */ 383 int 384 pppioctl(sc, cmd, data, flag, p) 385 struct ppp_softc *sc; 386 u_long cmd; 387 caddr_t data; 388 int flag; 389 struct proc *p; 390 { 391 int s, error, flags, mru, npx; 392 u_int nb; 393 struct ppp_option_data *odp; 394 struct compressor **cp; 395 struct npioctl *npi; 396 time_t t; 397 #ifdef PPP_FILTER 398 struct bpf_program *bp, *nbp; 399 struct bpf_insn *newcode, *oldcode; 400 int newcodelen; 401 #endif /* PPP_FILTER */ 402 #ifdef PPP_COMPRESS 403 u_char ccp_option[CCP_MAX_OPTION_LENGTH]; 404 #endif 405 406 switch (cmd) { 407 case FIONREAD: 408 *(int *)data = sc->sc_inq.ifq_len; 409 break; 410 411 case PPPIOCGUNIT: 412 *(int *)data = sc->sc_unit; /* XXX */ 413 break; 414 415 case PPPIOCGFLAGS: 416 *(u_int *)data = sc->sc_flags; 417 break; 418 419 case PPPIOCSFLAGS: 420 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 421 return (error); 422 flags = *(int *)data & SC_MASK; 423 s = splsoftnet(); 424 #ifdef PPP_COMPRESS 425 if (sc->sc_flags & SC_CCP_OPEN && !(flags & SC_CCP_OPEN)) 426 ppp_ccp_closed(sc); 427 #endif 428 splhigh(); /* XXX IMP ME HARDER */ 429 sc->sc_flags = (sc->sc_flags & ~SC_MASK) | flags; 430 splx(s); 431 break; 432 433 case PPPIOCSMRU: 434 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 435 return (error); 436 mru = *(int *)data; 437 if (mru >= PPP_MINMRU && mru <= PPP_MAXMRU) 438 sc->sc_mru = mru; 439 break; 440 441 case PPPIOCGMRU: 442 *(int *)data = sc->sc_mru; 443 break; 444 445 #ifdef VJC 446 case PPPIOCSMAXCID: 447 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 448 return (error); 449 if (sc->sc_comp) { 450 s = splsoftnet(); 451 sl_compress_setup(sc->sc_comp, *(int *)data); 452 splx(s); 453 } 454 break; 455 #endif 456 457 case PPPIOCXFERUNIT: 458 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 459 return (error); 460 sc->sc_xfer = p->p_pid; 461 break; 462 463 #ifdef PPP_COMPRESS 464 case PPPIOCSCOMPRESS: 465 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 466 return (error); 467 odp = (struct ppp_option_data *) data; 468 nb = odp->length; 469 if (nb > sizeof(ccp_option)) 470 nb = sizeof(ccp_option); 471 if ((error = copyin(odp->ptr, ccp_option, nb)) != 0) 472 return (error); 473 if (ccp_option[1] < 2) /* preliminary check on the length byte */ 474 return (EINVAL); 475 for (cp = ppp_compressors; *cp != NULL; ++cp) 476 if ((*cp)->compress_proto == ccp_option[0]) { 477 /* 478 * Found a handler for the protocol - try to allocate 479 * a compressor or decompressor. 480 */ 481 error = 0; 482 if (odp->transmit) { 483 s = splsoftnet(); 484 if (sc->sc_xc_state != NULL) 485 (*sc->sc_xcomp->comp_free)(sc->sc_xc_state); 486 sc->sc_xcomp = *cp; 487 sc->sc_xc_state = (*cp)->comp_alloc(ccp_option, nb); 488 if (sc->sc_xc_state == NULL) { 489 if (sc->sc_flags & SC_DEBUG) 490 printf("%s: comp_alloc failed\n", 491 sc->sc_if.if_xname); 492 error = ENOBUFS; 493 } 494 splhigh(); /* XXX IMP ME HARDER */ 495 sc->sc_flags &= ~SC_COMP_RUN; 496 splx(s); 497 } else { 498 s = splsoftnet(); 499 if (sc->sc_rc_state != NULL) 500 (*sc->sc_rcomp->decomp_free)(sc->sc_rc_state); 501 sc->sc_rcomp = *cp; 502 sc->sc_rc_state = (*cp)->decomp_alloc(ccp_option, nb); 503 if (sc->sc_rc_state == NULL) { 504 if (sc->sc_flags & SC_DEBUG) 505 printf("%s: decomp_alloc failed\n", 506 sc->sc_if.if_xname); 507 error = ENOBUFS; 508 } 509 splhigh(); /* XXX IMP ME HARDER */ 510 sc->sc_flags &= ~SC_DECOMP_RUN; 511 splx(s); 512 } 513 return (error); 514 } 515 if (sc->sc_flags & SC_DEBUG) 516 printf("%s: no compressor for [%x %x %x], %x\n", 517 sc->sc_if.if_xname, ccp_option[0], ccp_option[1], 518 ccp_option[2], nb); 519 return (EINVAL); /* no handler found */ 520 #endif /* PPP_COMPRESS */ 521 522 case PPPIOCGNPMODE: 523 case PPPIOCSNPMODE: 524 npi = (struct npioctl *) data; 525 switch (npi->protocol) { 526 case PPP_IP: 527 npx = NP_IP; 528 break; 529 case PPP_IPV6: 530 npx = NP_IPV6; 531 break; 532 default: 533 return EINVAL; 534 } 535 if (cmd == PPPIOCGNPMODE) { 536 npi->mode = sc->sc_npmode[npx]; 537 } else { 538 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 539 return (error); 540 if (npi->mode != sc->sc_npmode[npx]) { 541 s = splnet(); 542 sc->sc_npmode[npx] = npi->mode; 543 if (npi->mode != NPMODE_QUEUE) { 544 ppp_requeue(sc); 545 ppp_restart(sc); 546 } 547 splx(s); 548 } 549 } 550 break; 551 552 case PPPIOCGIDLE: 553 s = splsoftnet(); 554 t = time.tv_sec; 555 ((struct ppp_idle *)data)->xmit_idle = t - sc->sc_last_sent; 556 ((struct ppp_idle *)data)->recv_idle = t - sc->sc_last_recv; 557 splx(s); 558 break; 559 560 #ifdef PPP_FILTER 561 case PPPIOCSPASS: 562 case PPPIOCSACTIVE: 563 /* These are no longer supported. */ 564 return EOPNOTSUPP; 565 566 case PPPIOCSIPASS: 567 case PPPIOCSOPASS: 568 case PPPIOCSIACTIVE: 569 case PPPIOCSOACTIVE: 570 nbp = (struct bpf_program *) data; 571 if ((unsigned) nbp->bf_len > BPF_MAXINSNS) 572 return EINVAL; 573 newcodelen = nbp->bf_len * sizeof(struct bpf_insn); 574 if (newcodelen != 0) { 575 newcode = malloc(newcodelen, M_DEVBUF, M_WAITOK); 576 /* WAITOK -- malloc() never fails. */ 577 if ((error = copyin((caddr_t)nbp->bf_insns, (caddr_t)newcode, 578 newcodelen)) != 0) { 579 free(newcode, M_DEVBUF); 580 return error; 581 } 582 if (!bpf_validate(newcode, nbp->bf_len)) { 583 free(newcode, M_DEVBUF); 584 return EINVAL; 585 } 586 } else 587 newcode = 0; 588 switch (cmd) { 589 case PPPIOCSIPASS: 590 bp = &sc->sc_pass_filt_in; 591 break; 592 593 case PPPIOCSOPASS: 594 bp = &sc->sc_pass_filt_out; 595 break; 596 597 case PPPIOCSIACTIVE: 598 bp = &sc->sc_active_filt_in; 599 break; 600 601 case PPPIOCSOACTIVE: 602 bp = &sc->sc_active_filt_out; 603 break; 604 } 605 oldcode = bp->bf_insns; 606 s = splnet(); 607 bp->bf_len = nbp->bf_len; 608 bp->bf_insns = newcode; 609 splx(s); 610 if (oldcode != 0) 611 free(oldcode, M_DEVBUF); 612 break; 613 #endif /* PPP_FILTER */ 614 615 default: 616 return (EPASSTHROUGH); 617 } 618 return (0); 619 } 620 621 /* 622 * Process an ioctl request to the ppp network interface. 623 */ 624 static int 625 pppsioctl(ifp, cmd, data) 626 struct ifnet *ifp; 627 u_long cmd; 628 caddr_t data; 629 { 630 struct proc *p = curproc; /* XXX */ 631 struct ppp_softc *sc = ifp->if_softc; 632 struct ifaddr *ifa = (struct ifaddr *)data; 633 struct ifreq *ifr = (struct ifreq *)data; 634 struct ppp_stats *psp; 635 #ifdef PPP_COMPRESS 636 struct ppp_comp_stats *pcp; 637 #endif 638 int s = splnet(), error = 0; 639 640 switch (cmd) { 641 case SIOCSIFFLAGS: 642 if ((ifp->if_flags & IFF_RUNNING) == 0) 643 ifp->if_flags &= ~IFF_UP; 644 break; 645 646 case SIOCSIFADDR: 647 switch (ifa->ifa_addr->sa_family) { 648 #ifdef INET 649 case AF_INET: 650 break; 651 #endif 652 #ifdef INET6 653 case AF_INET6: 654 break; 655 #endif 656 default: 657 error = EAFNOSUPPORT; 658 break; 659 } 660 break; 661 662 case SIOCSIFDSTADDR: 663 switch (ifa->ifa_addr->sa_family) { 664 #ifdef INET 665 case AF_INET: 666 break; 667 #endif 668 #ifdef INET6 669 case AF_INET6: 670 break; 671 #endif 672 default: 673 error = EAFNOSUPPORT; 674 break; 675 } 676 break; 677 678 case SIOCSIFMTU: 679 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 680 break; 681 sc->sc_if.if_mtu = ifr->ifr_mtu; 682 break; 683 684 case SIOCGIFMTU: 685 ifr->ifr_mtu = sc->sc_if.if_mtu; 686 break; 687 688 case SIOCADDMULTI: 689 case SIOCDELMULTI: 690 if (ifr == 0) { 691 error = EAFNOSUPPORT; 692 break; 693 } 694 switch(ifr->ifr_addr.sa_family) { 695 #ifdef INET 696 case AF_INET: 697 break; 698 #endif 699 #ifdef INET6 700 case AF_INET6: 701 break; 702 #endif 703 default: 704 error = EAFNOSUPPORT; 705 break; 706 } 707 break; 708 709 case SIOCGPPPSTATS: 710 psp = &((struct ifpppstatsreq *) data)->stats; 711 memset(psp, 0, sizeof(*psp)); 712 psp->p = sc->sc_stats; 713 #if defined(VJC) && !defined(SL_NO_STATS) 714 if (sc->sc_comp) { 715 psp->vj.vjs_packets = sc->sc_comp->sls_packets; 716 psp->vj.vjs_compressed = sc->sc_comp->sls_compressed; 717 psp->vj.vjs_searches = sc->sc_comp->sls_searches; 718 psp->vj.vjs_misses = sc->sc_comp->sls_misses; 719 psp->vj.vjs_uncompressedin = sc->sc_comp->sls_uncompressedin; 720 psp->vj.vjs_compressedin = sc->sc_comp->sls_compressedin; 721 psp->vj.vjs_errorin = sc->sc_comp->sls_errorin; 722 psp->vj.vjs_tossed = sc->sc_comp->sls_tossed; 723 } 724 #endif /* VJC */ 725 break; 726 727 #ifdef PPP_COMPRESS 728 case SIOCGPPPCSTATS: 729 pcp = &((struct ifpppcstatsreq *) data)->stats; 730 memset(pcp, 0, sizeof(*pcp)); 731 if (sc->sc_xc_state != NULL) 732 (*sc->sc_xcomp->comp_stat)(sc->sc_xc_state, &pcp->c); 733 if (sc->sc_rc_state != NULL) 734 (*sc->sc_rcomp->decomp_stat)(sc->sc_rc_state, &pcp->d); 735 break; 736 #endif /* PPP_COMPRESS */ 737 738 default: 739 error = EINVAL; 740 } 741 splx(s); 742 return (error); 743 } 744 745 /* 746 * Queue a packet. Start transmission if not active. 747 * Packet is placed in Information field of PPP frame. 748 */ 749 int 750 pppoutput(ifp, m0, dst, rtp) 751 struct ifnet *ifp; 752 struct mbuf *m0; 753 struct sockaddr *dst; 754 struct rtentry *rtp; 755 { 756 struct ppp_softc *sc = ifp->if_softc; 757 int protocol, address, control; 758 u_char *cp; 759 int s, error; 760 #ifdef INET 761 struct ip *ip; 762 #endif 763 struct ifqueue *ifq; 764 enum NPmode mode; 765 int len; 766 struct mbuf *m; 767 ALTQ_DECL(struct altq_pktattr pktattr;) 768 769 if (sc->sc_devp == NULL || (ifp->if_flags & IFF_RUNNING) == 0 770 || ((ifp->if_flags & IFF_UP) == 0 && dst->sa_family != AF_UNSPEC)) { 771 error = ENETDOWN; /* sort of */ 772 goto bad; 773 } 774 775 IFQ_CLASSIFY(&ifp->if_snd, m0, dst->sa_family, &pktattr); 776 777 /* 778 * Compute PPP header. 779 */ 780 m0->m_flags &= ~M_HIGHPRI; 781 switch (dst->sa_family) { 782 #ifdef INET 783 case AF_INET: 784 address = PPP_ALLSTATIONS; 785 control = PPP_UI; 786 protocol = PPP_IP; 787 mode = sc->sc_npmode[NP_IP]; 788 789 /* 790 * If this packet has the "low delay" bit set in the IP header, 791 * put it on the fastq instead. 792 */ 793 ip = mtod(m0, struct ip *); 794 if (ip->ip_tos & IPTOS_LOWDELAY) 795 m0->m_flags |= M_HIGHPRI; 796 break; 797 #endif 798 #ifdef INET6 799 case AF_INET6: 800 address = PPP_ALLSTATIONS; /*XXX*/ 801 control = PPP_UI; /*XXX*/ 802 protocol = PPP_IPV6; 803 mode = sc->sc_npmode[NP_IPV6]; 804 805 #if 0 /* XXX flowinfo/traffic class, maybe? */ 806 /* 807 * If this packet has the "low delay" bit set in the IP header, 808 * put it on the fastq instead. 809 */ 810 ip = mtod(m0, struct ip *); 811 if (ip->ip_tos & IPTOS_LOWDELAY) 812 m0->m_flags |= M_HIGHPRI; 813 #endif 814 break; 815 #endif 816 case AF_UNSPEC: 817 address = PPP_ADDRESS(dst->sa_data); 818 control = PPP_CONTROL(dst->sa_data); 819 protocol = PPP_PROTOCOL(dst->sa_data); 820 mode = NPMODE_PASS; 821 break; 822 default: 823 printf("%s: af%d not supported\n", ifp->if_xname, dst->sa_family); 824 error = EAFNOSUPPORT; 825 goto bad; 826 } 827 828 /* 829 * Drop this packet, or return an error, if necessary. 830 */ 831 if (mode == NPMODE_ERROR) { 832 error = ENETDOWN; 833 goto bad; 834 } 835 if (mode == NPMODE_DROP) { 836 error = 0; 837 goto bad; 838 } 839 840 /* 841 * Add PPP header. If no space in first mbuf, allocate another. 842 * (This assumes M_LEADINGSPACE is always 0 for a cluster mbuf.) 843 */ 844 if (M_LEADINGSPACE(m0) < PPP_HDRLEN) { 845 m0 = m_prepend(m0, PPP_HDRLEN, M_DONTWAIT); 846 if (m0 == 0) { 847 error = ENOBUFS; 848 goto bad; 849 } 850 m0->m_len = 0; 851 } else 852 m0->m_data -= PPP_HDRLEN; 853 854 cp = mtod(m0, u_char *); 855 *cp++ = address; 856 *cp++ = control; 857 *cp++ = protocol >> 8; 858 *cp++ = protocol & 0xff; 859 m0->m_len += PPP_HDRLEN; 860 861 len = 0; 862 for (m = m0; m != 0; m = m->m_next) 863 len += m->m_len; 864 865 if (sc->sc_flags & SC_LOG_OUTPKT) { 866 printf("%s output: ", ifp->if_xname); 867 pppdumpm(m0); 868 } 869 870 if ((protocol & 0x8000) == 0) { 871 #ifdef PPP_FILTER 872 /* 873 * Apply the pass and active filters to the packet, 874 * but only if it is a data packet. 875 */ 876 if (sc->sc_pass_filt_out.bf_insns != 0 877 && bpf_filter(sc->sc_pass_filt_out.bf_insns, (u_char *) m0, 878 len, 0) == 0) { 879 error = 0; /* drop this packet */ 880 goto bad; 881 } 882 883 /* 884 * Update the time we sent the most recent packet. 885 */ 886 if (sc->sc_active_filt_out.bf_insns == 0 887 || bpf_filter(sc->sc_active_filt_out.bf_insns, (u_char *) m0, 888 len, 0)) 889 sc->sc_last_sent = time.tv_sec; 890 #else 891 /* 892 * Update the time we sent the most recent packet. 893 */ 894 sc->sc_last_sent = time.tv_sec; 895 #endif /* PPP_FILTER */ 896 } 897 898 #if NBPFILTER > 0 899 /* 900 * See if bpf wants to look at the packet. 901 */ 902 if (sc->sc_if.if_bpf) 903 bpf_mtap(sc->sc_if.if_bpf, m0); 904 #endif 905 906 /* 907 * Put the packet on the appropriate queue. 908 */ 909 s = splnet(); 910 if (mode == NPMODE_QUEUE) { 911 /* XXX we should limit the number of packets on this queue */ 912 *sc->sc_npqtail = m0; 913 m0->m_nextpkt = NULL; 914 sc->sc_npqtail = &m0->m_nextpkt; 915 } else { 916 if ((m0->m_flags & M_HIGHPRI) 917 #ifdef ALTQ 918 && ALTQ_IS_ENABLED(&sc->sc_if.if_snd) == 0 919 #endif 920 ) { 921 ifq = &sc->sc_fastq; 922 if (IF_QFULL(ifq) && dst->sa_family != AF_UNSPEC) { 923 IF_DROP(ifq); 924 splx(s); 925 error = ENOBUFS; 926 goto bad; 927 } else { 928 IF_ENQUEUE(ifq, m0); 929 error = 0; 930 } 931 } else 932 IFQ_ENQUEUE(&sc->sc_if.if_snd, m0, &pktattr, error); 933 if (error) { 934 splx(s); 935 sc->sc_if.if_oerrors++; 936 sc->sc_stats.ppp_oerrors++; 937 return (error); 938 } 939 ppp_restart(sc); 940 } 941 ifp->if_opackets++; 942 ifp->if_obytes += len; 943 944 splx(s); 945 return (0); 946 947 bad: 948 m_freem(m0); 949 return (error); 950 } 951 952 /* 953 * After a change in the NPmode for some NP, move packets from the 954 * npqueue to the send queue or the fast queue as appropriate. 955 * Should be called at splnet, since we muck with the queues. 956 */ 957 static void 958 ppp_requeue(sc) 959 struct ppp_softc *sc; 960 { 961 struct mbuf *m, **mpp; 962 struct ifqueue *ifq; 963 enum NPmode mode; 964 int error; 965 966 for (mpp = &sc->sc_npqueue; (m = *mpp) != NULL; ) { 967 switch (PPP_PROTOCOL(mtod(m, u_char *))) { 968 case PPP_IP: 969 mode = sc->sc_npmode[NP_IP]; 970 break; 971 case PPP_IPV6: 972 mode = sc->sc_npmode[NP_IPV6]; 973 break; 974 default: 975 mode = NPMODE_PASS; 976 } 977 978 switch (mode) { 979 case NPMODE_PASS: 980 /* 981 * This packet can now go on one of the queues to be sent. 982 */ 983 *mpp = m->m_nextpkt; 984 m->m_nextpkt = NULL; 985 if ((m->m_flags & M_HIGHPRI) 986 #ifdef ALTQ 987 && ALTQ_IS_ENABLED(&sc->sc_if.if_snd) == 0 988 #endif 989 ) { 990 ifq = &sc->sc_fastq; 991 if (IF_QFULL(ifq)) { 992 IF_DROP(ifq); 993 m_freem(m); 994 error = ENOBUFS; 995 } else { 996 IF_ENQUEUE(ifq, m); 997 error = 0; 998 } 999 } else 1000 IFQ_ENQUEUE(&sc->sc_if.if_snd, m, NULL, error); 1001 if (error) { 1002 sc->sc_if.if_oerrors++; 1003 sc->sc_stats.ppp_oerrors++; 1004 } 1005 break; 1006 1007 case NPMODE_DROP: 1008 case NPMODE_ERROR: 1009 *mpp = m->m_nextpkt; 1010 m_freem(m); 1011 break; 1012 1013 case NPMODE_QUEUE: 1014 mpp = &m->m_nextpkt; 1015 break; 1016 } 1017 } 1018 sc->sc_npqtail = mpp; 1019 } 1020 1021 /* 1022 * Transmitter has finished outputting some stuff; 1023 * remember to call sc->sc_start later at splsoftnet. 1024 */ 1025 void 1026 ppp_restart(sc) 1027 struct ppp_softc *sc; 1028 { 1029 int s = splhigh(); /* XXX IMP ME HARDER */ 1030 1031 sc->sc_flags &= ~SC_TBUSY; 1032 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1033 softintr_schedule(sc->sc_si); 1034 #else 1035 schednetisr(NETISR_PPP); 1036 #endif 1037 splx(s); 1038 } 1039 1040 /* 1041 * Get a packet to send. This procedure is intended to be called at 1042 * splsoftnet, since it may involve time-consuming operations such as 1043 * applying VJ compression, packet compression, address/control and/or 1044 * protocol field compression to the packet. 1045 */ 1046 struct mbuf * 1047 ppp_dequeue(sc) 1048 struct ppp_softc *sc; 1049 { 1050 struct mbuf *m, *mp; 1051 u_char *cp; 1052 int address, control, protocol; 1053 int s; 1054 1055 /* 1056 * Grab a packet to send: first try the fast queue, then the 1057 * normal queue. 1058 */ 1059 s = splnet(); 1060 IF_DEQUEUE(&sc->sc_fastq, m); 1061 if (m == NULL) 1062 IFQ_DEQUEUE(&sc->sc_if.if_snd, m); 1063 splx(s); 1064 1065 if (m == NULL) 1066 return NULL; 1067 1068 ++sc->sc_stats.ppp_opackets; 1069 1070 /* 1071 * Extract the ppp header of the new packet. 1072 * The ppp header will be in one mbuf. 1073 */ 1074 cp = mtod(m, u_char *); 1075 address = PPP_ADDRESS(cp); 1076 control = PPP_CONTROL(cp); 1077 protocol = PPP_PROTOCOL(cp); 1078 1079 switch (protocol) { 1080 case PPP_IP: 1081 #ifdef VJC 1082 /* 1083 * If the packet is a TCP/IP packet, see if we can compress it. 1084 */ 1085 if ((sc->sc_flags & SC_COMP_TCP) && sc->sc_comp != NULL) { 1086 struct ip *ip; 1087 int type; 1088 1089 mp = m; 1090 ip = (struct ip *) (cp + PPP_HDRLEN); 1091 if (mp->m_len <= PPP_HDRLEN) { 1092 mp = mp->m_next; 1093 if (mp == NULL) 1094 break; 1095 ip = mtod(mp, struct ip *); 1096 } 1097 /* this code assumes the IP/TCP header is in one non-shared mbuf */ 1098 if (ip->ip_p == IPPROTO_TCP) { 1099 type = sl_compress_tcp(mp, ip, sc->sc_comp, 1100 !(sc->sc_flags & SC_NO_TCP_CCID)); 1101 switch (type) { 1102 case TYPE_UNCOMPRESSED_TCP: 1103 protocol = PPP_VJC_UNCOMP; 1104 break; 1105 case TYPE_COMPRESSED_TCP: 1106 protocol = PPP_VJC_COMP; 1107 cp = mtod(m, u_char *); 1108 cp[0] = address; /* header has moved */ 1109 cp[1] = control; 1110 cp[2] = 0; 1111 break; 1112 } 1113 cp[3] = protocol; /* update protocol in PPP header */ 1114 } 1115 } 1116 #endif /* VJC */ 1117 break; 1118 1119 #ifdef PPP_COMPRESS 1120 case PPP_CCP: 1121 ppp_ccp(sc, m, 0); 1122 break; 1123 #endif /* PPP_COMPRESS */ 1124 } 1125 1126 #ifdef PPP_COMPRESS 1127 if (protocol != PPP_LCP && protocol != PPP_CCP 1128 && sc->sc_xc_state && (sc->sc_flags & SC_COMP_RUN)) { 1129 struct mbuf *mcomp = NULL; 1130 int slen, clen; 1131 1132 slen = 0; 1133 for (mp = m; mp != NULL; mp = mp->m_next) 1134 slen += mp->m_len; 1135 clen = (*sc->sc_xcomp->compress) 1136 (sc->sc_xc_state, &mcomp, m, slen, sc->sc_if.if_mtu + PPP_HDRLEN); 1137 if (mcomp != NULL) { 1138 if (sc->sc_flags & SC_CCP_UP) { 1139 /* Send the compressed packet instead of the original. */ 1140 m_freem(m); 1141 m = mcomp; 1142 cp = mtod(m, u_char *); 1143 protocol = cp[3]; 1144 } else { 1145 /* Can't transmit compressed packets until CCP is up. */ 1146 m_freem(mcomp); 1147 } 1148 } 1149 } 1150 #endif /* PPP_COMPRESS */ 1151 1152 /* 1153 * Compress the address/control and protocol, if possible. 1154 */ 1155 if (sc->sc_flags & SC_COMP_AC && address == PPP_ALLSTATIONS && 1156 control == PPP_UI && protocol != PPP_ALLSTATIONS && 1157 protocol != PPP_LCP) { 1158 /* can compress address/control */ 1159 m->m_data += 2; 1160 m->m_len -= 2; 1161 } 1162 if (sc->sc_flags & SC_COMP_PROT && protocol < 0xFF) { 1163 /* can compress protocol */ 1164 if (mtod(m, u_char *) == cp) { 1165 cp[2] = cp[1]; /* move address/control up */ 1166 cp[1] = cp[0]; 1167 } 1168 ++m->m_data; 1169 --m->m_len; 1170 } 1171 1172 return m; 1173 } 1174 1175 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1176 void 1177 pppnetisr(void) 1178 { 1179 struct ppp_softc *sc; 1180 int i; 1181 1182 for (i = 0; i < NPPP; i++) { 1183 sc = &ppp_softc[i]; 1184 pppintr(sc); 1185 } 1186 } 1187 #endif 1188 1189 /* 1190 * Software interrupt routine, called at splsoftnet. 1191 */ 1192 void 1193 pppintr(void *arg) 1194 { 1195 struct ppp_softc *sc = arg; 1196 struct mbuf *m; 1197 int s; 1198 1199 if (!(sc->sc_flags & SC_TBUSY) 1200 && (IFQ_IS_EMPTY(&sc->sc_if.if_snd) == 0 || sc->sc_fastq.ifq_head 1201 || sc->sc_outm)) { 1202 s = splhigh(); /* XXX IMP ME HARDER */ 1203 sc->sc_flags |= SC_TBUSY; 1204 splx(s); 1205 (*sc->sc_start)(sc); 1206 } 1207 for (;;) { 1208 s = splnet(); 1209 IF_DEQUEUE(&sc->sc_rawq, m); 1210 splx(s); 1211 if (m == NULL) 1212 break; 1213 ppp_inproc(sc, m); 1214 } 1215 } 1216 1217 #ifdef PPP_COMPRESS 1218 /* 1219 * Handle a CCP packet. `rcvd' is 1 if the packet was received, 1220 * 0 if it is about to be transmitted. 1221 */ 1222 static void 1223 ppp_ccp(sc, m, rcvd) 1224 struct ppp_softc *sc; 1225 struct mbuf *m; 1226 int rcvd; 1227 { 1228 u_char *dp, *ep; 1229 struct mbuf *mp; 1230 int slen, s; 1231 1232 /* 1233 * Get a pointer to the data after the PPP header. 1234 */ 1235 if (m->m_len <= PPP_HDRLEN) { 1236 mp = m->m_next; 1237 if (mp == NULL) 1238 return; 1239 dp = (mp != NULL)? mtod(mp, u_char *): NULL; 1240 } else { 1241 mp = m; 1242 dp = mtod(mp, u_char *) + PPP_HDRLEN; 1243 } 1244 1245 ep = mtod(mp, u_char *) + mp->m_len; 1246 if (dp + CCP_HDRLEN > ep) 1247 return; 1248 slen = CCP_LENGTH(dp); 1249 if (dp + slen > ep) { 1250 if (sc->sc_flags & SC_DEBUG) 1251 printf("if_ppp/ccp: not enough data in mbuf (%p+%x > %p+%x)\n", 1252 dp, slen, mtod(mp, u_char *), mp->m_len); 1253 return; 1254 } 1255 1256 switch (CCP_CODE(dp)) { 1257 case CCP_CONFREQ: 1258 case CCP_TERMREQ: 1259 case CCP_TERMACK: 1260 /* CCP must be going down - disable compression */ 1261 if (sc->sc_flags & SC_CCP_UP) { 1262 s = splhigh(); /* XXX IMP ME HARDER */ 1263 sc->sc_flags &= ~(SC_CCP_UP | SC_COMP_RUN | SC_DECOMP_RUN); 1264 splx(s); 1265 } 1266 break; 1267 1268 case CCP_CONFACK: 1269 if (sc->sc_flags & SC_CCP_OPEN && !(sc->sc_flags & SC_CCP_UP) 1270 && slen >= CCP_HDRLEN + CCP_OPT_MINLEN 1271 && slen >= CCP_OPT_LENGTH(dp + CCP_HDRLEN) + CCP_HDRLEN) { 1272 if (!rcvd) { 1273 /* we're agreeing to send compressed packets. */ 1274 if (sc->sc_xc_state != NULL 1275 && (*sc->sc_xcomp->comp_init) 1276 (sc->sc_xc_state, dp + CCP_HDRLEN, slen - CCP_HDRLEN, 1277 sc->sc_unit, 0, sc->sc_flags & SC_DEBUG)) { 1278 s = splhigh(); /* XXX IMP ME HARDER */ 1279 sc->sc_flags |= SC_COMP_RUN; 1280 splx(s); 1281 } 1282 } else { 1283 /* peer is agreeing to send compressed packets. */ 1284 if (sc->sc_rc_state != NULL 1285 && (*sc->sc_rcomp->decomp_init) 1286 (sc->sc_rc_state, dp + CCP_HDRLEN, slen - CCP_HDRLEN, 1287 sc->sc_unit, 0, sc->sc_mru, 1288 sc->sc_flags & SC_DEBUG)) { 1289 s = splhigh(); /* XXX IMP ME HARDER */ 1290 sc->sc_flags |= SC_DECOMP_RUN; 1291 sc->sc_flags &= ~(SC_DC_ERROR | SC_DC_FERROR); 1292 splx(s); 1293 } 1294 } 1295 } 1296 break; 1297 1298 case CCP_RESETACK: 1299 if (sc->sc_flags & SC_CCP_UP) { 1300 if (!rcvd) { 1301 if (sc->sc_xc_state && (sc->sc_flags & SC_COMP_RUN)) 1302 (*sc->sc_xcomp->comp_reset)(sc->sc_xc_state); 1303 } else { 1304 if (sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN)) { 1305 (*sc->sc_rcomp->decomp_reset)(sc->sc_rc_state); 1306 s = splhigh(); /* XXX IMP ME HARDER */ 1307 sc->sc_flags &= ~SC_DC_ERROR; 1308 splx(s); 1309 } 1310 } 1311 } 1312 break; 1313 } 1314 } 1315 1316 /* 1317 * CCP is down; free (de)compressor state if necessary. 1318 */ 1319 static void 1320 ppp_ccp_closed(sc) 1321 struct ppp_softc *sc; 1322 { 1323 if (sc->sc_xc_state) { 1324 (*sc->sc_xcomp->comp_free)(sc->sc_xc_state); 1325 sc->sc_xc_state = NULL; 1326 } 1327 if (sc->sc_rc_state) { 1328 (*sc->sc_rcomp->decomp_free)(sc->sc_rc_state); 1329 sc->sc_rc_state = NULL; 1330 } 1331 } 1332 #endif /* PPP_COMPRESS */ 1333 1334 /* 1335 * PPP packet input routine. 1336 * The caller has checked and removed the FCS and has inserted 1337 * the address/control bytes and the protocol high byte if they 1338 * were omitted. 1339 */ 1340 void 1341 ppppktin(sc, m, lost) 1342 struct ppp_softc *sc; 1343 struct mbuf *m; 1344 int lost; 1345 { 1346 int s = splhigh(); /* XXX IMP ME HARDER */ 1347 1348 if (lost) 1349 m->m_flags |= M_ERRMARK; 1350 IF_ENQUEUE(&sc->sc_rawq, m); 1351 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1352 softintr_schedule(sc->sc_si); 1353 #else 1354 schednetisr(NETISR_PPP); 1355 #endif 1356 splx(s); 1357 } 1358 1359 /* 1360 * Process a received PPP packet, doing decompression as necessary. 1361 * Should be called at splsoftnet. 1362 */ 1363 #define COMPTYPE(proto) ((proto) == PPP_VJC_COMP? TYPE_COMPRESSED_TCP: \ 1364 TYPE_UNCOMPRESSED_TCP) 1365 1366 static void 1367 ppp_inproc(sc, m) 1368 struct ppp_softc *sc; 1369 struct mbuf *m; 1370 { 1371 struct ifnet *ifp = &sc->sc_if; 1372 struct ifqueue *inq; 1373 int s, ilen, proto, rv; 1374 u_char *cp, adrs, ctrl; 1375 struct mbuf *mp, *dmp = NULL; 1376 #ifdef VJC 1377 int xlen; 1378 u_char *iphdr; 1379 u_int hlen; 1380 #endif 1381 1382 sc->sc_stats.ppp_ipackets++; 1383 1384 if (sc->sc_flags & SC_LOG_INPKT) { 1385 ilen = 0; 1386 for (mp = m; mp != NULL; mp = mp->m_next) 1387 ilen += mp->m_len; 1388 printf("%s: got %d bytes\n", ifp->if_xname, ilen); 1389 pppdumpm(m); 1390 } 1391 1392 cp = mtod(m, u_char *); 1393 adrs = PPP_ADDRESS(cp); 1394 ctrl = PPP_CONTROL(cp); 1395 proto = PPP_PROTOCOL(cp); 1396 1397 if (m->m_flags & M_ERRMARK) { 1398 m->m_flags &= ~M_ERRMARK; 1399 s = splhigh(); /* XXX IMP ME HARDER */ 1400 sc->sc_flags |= SC_VJ_RESET; 1401 splx(s); 1402 } 1403 1404 #ifdef PPP_COMPRESS 1405 /* 1406 * Decompress this packet if necessary, update the receiver's 1407 * dictionary, or take appropriate action on a CCP packet. 1408 */ 1409 if (proto == PPP_COMP && sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN) 1410 && !(sc->sc_flags & SC_DC_ERROR) && !(sc->sc_flags & SC_DC_FERROR)) { 1411 /* decompress this packet */ 1412 rv = (*sc->sc_rcomp->decompress)(sc->sc_rc_state, m, &dmp); 1413 if (rv == DECOMP_OK) { 1414 m_freem(m); 1415 if (dmp == NULL) { 1416 /* no error, but no decompressed packet produced */ 1417 return; 1418 } 1419 m = dmp; 1420 cp = mtod(m, u_char *); 1421 proto = PPP_PROTOCOL(cp); 1422 1423 } else { 1424 /* 1425 * An error has occurred in decompression. 1426 * Pass the compressed packet up to pppd, which may take 1427 * CCP down or issue a Reset-Req. 1428 */ 1429 if (sc->sc_flags & SC_DEBUG) 1430 printf("%s: decompress failed %d\n", ifp->if_xname, rv); 1431 s = splhigh(); /* XXX IMP ME HARDER */ 1432 sc->sc_flags |= SC_VJ_RESET; 1433 if (rv == DECOMP_ERROR) 1434 sc->sc_flags |= SC_DC_ERROR; 1435 else 1436 sc->sc_flags |= SC_DC_FERROR; 1437 splx(s); 1438 } 1439 1440 } else { 1441 if (sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN)) { 1442 (*sc->sc_rcomp->incomp)(sc->sc_rc_state, m); 1443 } 1444 if (proto == PPP_CCP) { 1445 ppp_ccp(sc, m, 1); 1446 } 1447 } 1448 #endif 1449 1450 ilen = 0; 1451 for (mp = m; mp != NULL; mp = mp->m_next) 1452 ilen += mp->m_len; 1453 1454 #ifdef VJC 1455 if (sc->sc_flags & SC_VJ_RESET) { 1456 /* 1457 * If we've missed a packet, we must toss subsequent compressed 1458 * packets which don't have an explicit connection ID. 1459 */ 1460 if (sc->sc_comp) 1461 sl_uncompress_tcp(NULL, 0, TYPE_ERROR, sc->sc_comp); 1462 s = splhigh(); /* XXX IMP ME HARDER */ 1463 sc->sc_flags &= ~SC_VJ_RESET; 1464 splx(s); 1465 } 1466 1467 /* 1468 * See if we have a VJ-compressed packet to uncompress. 1469 */ 1470 if (proto == PPP_VJC_COMP) { 1471 if ((sc->sc_flags & SC_REJ_COMP_TCP) || sc->sc_comp == 0) 1472 goto bad; 1473 1474 xlen = sl_uncompress_tcp_core(cp + PPP_HDRLEN, m->m_len - PPP_HDRLEN, 1475 ilen - PPP_HDRLEN, TYPE_COMPRESSED_TCP, 1476 sc->sc_comp, &iphdr, &hlen); 1477 1478 if (xlen <= 0) { 1479 if (sc->sc_flags & SC_DEBUG) 1480 printf("%s: VJ uncompress failed on type comp\n", 1481 ifp->if_xname); 1482 goto bad; 1483 } 1484 1485 /* Copy the PPP and IP headers into a new mbuf. */ 1486 MGETHDR(mp, M_DONTWAIT, MT_DATA); 1487 if (mp == NULL) 1488 goto bad; 1489 mp->m_len = 0; 1490 mp->m_next = NULL; 1491 if (hlen + PPP_HDRLEN > MHLEN) { 1492 MCLGET(mp, M_DONTWAIT); 1493 if (M_TRAILINGSPACE(mp) < hlen + PPP_HDRLEN) { 1494 m_freem(mp); 1495 goto bad; /* lose if big headers and no clusters */ 1496 } 1497 } 1498 cp = mtod(mp, u_char *); 1499 cp[0] = adrs; 1500 cp[1] = ctrl; 1501 cp[2] = 0; 1502 cp[3] = PPP_IP; 1503 proto = PPP_IP; 1504 bcopy(iphdr, cp + PPP_HDRLEN, hlen); 1505 mp->m_len = hlen + PPP_HDRLEN; 1506 1507 /* 1508 * Trim the PPP and VJ headers off the old mbuf 1509 * and stick the new and old mbufs together. 1510 */ 1511 m->m_data += PPP_HDRLEN + xlen; 1512 m->m_len -= PPP_HDRLEN + xlen; 1513 if (m->m_len <= M_TRAILINGSPACE(mp)) { 1514 bcopy(mtod(m, u_char *), mtod(mp, u_char *) + mp->m_len, m->m_len); 1515 mp->m_len += m->m_len; 1516 MFREE(m, mp->m_next); 1517 } else 1518 mp->m_next = m; 1519 m = mp; 1520 ilen += hlen - xlen; 1521 1522 } else if (proto == PPP_VJC_UNCOMP) { 1523 if ((sc->sc_flags & SC_REJ_COMP_TCP) || sc->sc_comp == 0) 1524 goto bad; 1525 1526 xlen = sl_uncompress_tcp_core(cp + PPP_HDRLEN, m->m_len - PPP_HDRLEN, 1527 ilen - PPP_HDRLEN, TYPE_UNCOMPRESSED_TCP, 1528 sc->sc_comp, &iphdr, &hlen); 1529 1530 if (xlen < 0) { 1531 if (sc->sc_flags & SC_DEBUG) 1532 printf("%s: VJ uncompress failed on type uncomp\n", 1533 ifp->if_xname); 1534 goto bad; 1535 } 1536 1537 proto = PPP_IP; 1538 cp[3] = PPP_IP; 1539 } 1540 #endif /* VJC */ 1541 1542 /* 1543 * If the packet will fit in a header mbuf, don't waste a 1544 * whole cluster on it. 1545 */ 1546 if (ilen <= MHLEN && M_IS_CLUSTER(m)) { 1547 MGETHDR(mp, M_DONTWAIT, MT_DATA); 1548 if (mp != NULL) { 1549 m_copydata(m, 0, ilen, mtod(mp, caddr_t)); 1550 m_freem(m); 1551 m = mp; 1552 m->m_len = ilen; 1553 } 1554 } 1555 m->m_pkthdr.len = ilen; 1556 m->m_pkthdr.rcvif = ifp; 1557 1558 if ((proto & 0x8000) == 0) { 1559 #ifdef PPP_FILTER 1560 /* 1561 * See whether we want to pass this packet, and 1562 * if it counts as link activity. 1563 */ 1564 if (sc->sc_pass_filt_in.bf_insns != 0 1565 && bpf_filter(sc->sc_pass_filt_in.bf_insns, (u_char *) m, 1566 ilen, 0) == 0) { 1567 /* drop this packet */ 1568 m_freem(m); 1569 return; 1570 } 1571 if (sc->sc_active_filt_in.bf_insns == 0 1572 || bpf_filter(sc->sc_active_filt_in.bf_insns, (u_char *) m, 1573 ilen, 0)) 1574 sc->sc_last_recv = time.tv_sec; 1575 #else 1576 /* 1577 * Record the time that we received this packet. 1578 */ 1579 sc->sc_last_recv = time.tv_sec; 1580 #endif /* PPP_FILTER */ 1581 } 1582 1583 #if NBPFILTER > 0 1584 /* See if bpf wants to look at the packet. */ 1585 if (sc->sc_if.if_bpf) 1586 bpf_mtap(sc->sc_if.if_bpf, m); 1587 #endif 1588 1589 rv = 0; 1590 switch (proto) { 1591 #ifdef INET 1592 case PPP_IP: 1593 /* 1594 * IP packet - take off the ppp header and pass it up to IP. 1595 */ 1596 if ((ifp->if_flags & IFF_UP) == 0 1597 || sc->sc_npmode[NP_IP] != NPMODE_PASS) { 1598 /* interface is down - drop the packet. */ 1599 m_freem(m); 1600 return; 1601 } 1602 m->m_pkthdr.len -= PPP_HDRLEN; 1603 m->m_data += PPP_HDRLEN; 1604 m->m_len -= PPP_HDRLEN; 1605 #ifdef GATEWAY 1606 if (ipflow_fastforward(m)) 1607 return; 1608 #endif 1609 schednetisr(NETISR_IP); 1610 inq = &ipintrq; 1611 break; 1612 #endif 1613 1614 #ifdef INET6 1615 case PPP_IPV6: 1616 /* 1617 * IPv6 packet - take off the ppp header and pass it up to IPv6. 1618 */ 1619 if ((ifp->if_flags & IFF_UP) == 0 1620 || sc->sc_npmode[NP_IPV6] != NPMODE_PASS) { 1621 /* interface is down - drop the packet. */ 1622 m_freem(m); 1623 return; 1624 } 1625 m->m_pkthdr.len -= PPP_HDRLEN; 1626 m->m_data += PPP_HDRLEN; 1627 m->m_len -= PPP_HDRLEN; 1628 schednetisr(NETISR_IPV6); 1629 inq = &ip6intrq; 1630 break; 1631 #endif 1632 1633 default: 1634 /* 1635 * Some other protocol - place on input queue for read(). 1636 */ 1637 inq = &sc->sc_inq; 1638 rv = 1; 1639 break; 1640 } 1641 1642 /* 1643 * Put the packet on the appropriate input queue. 1644 */ 1645 s = splnet(); 1646 if (IF_QFULL(inq)) { 1647 IF_DROP(inq); 1648 splx(s); 1649 if (sc->sc_flags & SC_DEBUG) 1650 printf("%s: input queue full\n", ifp->if_xname); 1651 ifp->if_iqdrops++; 1652 goto bad; 1653 } 1654 IF_ENQUEUE(inq, m); 1655 splx(s); 1656 ifp->if_ipackets++; 1657 ifp->if_ibytes += ilen; 1658 1659 if (rv) 1660 (*sc->sc_ctlp)(sc); 1661 1662 return; 1663 1664 bad: 1665 m_freem(m); 1666 sc->sc_if.if_ierrors++; 1667 sc->sc_stats.ppp_ierrors++; 1668 } 1669 1670 #define MAX_DUMP_BYTES 128 1671 1672 static void 1673 pppdumpm(m0) 1674 struct mbuf *m0; 1675 { 1676 char buf[3*MAX_DUMP_BYTES+4]; 1677 char *bp = buf; 1678 struct mbuf *m; 1679 static char digits[] = "0123456789abcdef"; 1680 1681 for (m = m0; m; m = m->m_next) { 1682 int l = m->m_len; 1683 u_char *rptr = (u_char *)m->m_data; 1684 1685 while (l--) { 1686 if (bp > buf + sizeof(buf) - 4) 1687 goto done; 1688 *bp++ = digits[*rptr >> 4]; /* convert byte to ascii hex */ 1689 *bp++ = digits[*rptr++ & 0xf]; 1690 } 1691 1692 if (m->m_next) { 1693 if (bp > buf + sizeof(buf) - 3) 1694 goto done; 1695 *bp++ = '|'; 1696 } else 1697 *bp++ = ' '; 1698 } 1699 done: 1700 if (m) 1701 *bp++ = '>'; 1702 *bp = 0; 1703 printf("%s\n", buf); 1704 } 1705 1706 #ifdef ALTQ 1707 /* 1708 * a wrapper to transmit a packet from if_start since ALTQ uses 1709 * if_start to send a packet. 1710 */ 1711 static void 1712 ppp_ifstart(ifp) 1713 struct ifnet *ifp; 1714 { 1715 struct ppp_softc *sc; 1716 1717 sc = ifp->if_softc; 1718 (*sc->sc_start)(sc); 1719 } 1720 #endif 1721
Indexes created Fri Oct 03 02:09:57 GMT 2025