if_spppsubr.c revision 27929
1/* 2 * Synchronous PPP/Cisco link level subroutines. 3 * Keepalive protocol implemented in both Cisco and PPP modes. 4 * 5 * Copyright (C) 1994 Cronyx Ltd. 6 * Author: Serge Vakulenko, <vak@cronyx.ru> 7 * 8 * Heavily revamped to conform to RFC 1661. 9 * Copyright (C) 1997, Joerg Wunsch. 10 * 11 * This software is distributed with NO WARRANTIES, not even the implied 12 * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 13 * 14 * Authors grant any other persons or organisations permission to use 15 * or modify this software as long as this message is kept with the software, 16 * all derivative works or modified versions. 17 * 18 * From: Version 1.9, Wed Oct 4 18:58:15 MSK 1995 19 * 20 * $Id: if_spppsubr.c,v 1.22 1997/05/23 20:40:15 joerg Exp $ 21 */ 22 23#include <sys/param.h> 24#include <sys/systm.h> 25#include <sys/kernel.h> 26#include <sys/sockio.h> 27#include <sys/socket.h> 28#include <sys/syslog.h> 29#include <sys/mbuf.h> 30 31#include <net/if.h> 32#include <net/netisr.h> 33#include <net/if_types.h> 34 35#ifdef INET 36#include <netinet/in.h> 37#include <netinet/in_systm.h> 38#include <netinet/in_var.h> 39#include <netinet/ip.h> 40#include <netinet/tcp.h> 41#include <netinet/if_ether.h> 42#endif 43 44#ifdef IPX 45#include <netipx/ipx.h> 46#include <netipx/ipx_if.h> 47#endif 48 49#ifdef NS 50#include <netns/ns.h> 51#include <netns/ns_if.h> 52#endif 53 54#ifdef ISO 55#include <netiso/argo_debug.h> 56#include <netiso/iso.h> 57#include <netiso/iso_var.h> 58#include <netiso/iso_snpac.h> 59#endif 60 61#include <net/if_sppp.h> 62 63#define MAXALIVECNT 3 /* max. alive packets */ 64 65/* 66 * Interface flags that can be set in an ifconfig command. 67 * 68 * Setting link0 will make the link passive, i.e. it will be marked 69 * as being administrative openable, but won't be opened to begin 70 * with. Incoming calls will be answered, or subsequent calls with 71 * -link1 will cause the administrative open of the LCP layer. 72 * 73 * Setting link1 will cause the link to auto-dial only as packets 74 * arrive to be sent. 75 */ 76 77#define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 78#define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 79 80#define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */ 81#define PPP_UI 0x03 /* Unnumbered Information */ 82#define PPP_IP 0x0021 /* Internet Protocol */ 83#define PPP_ISO 0x0023 /* ISO OSI Protocol */ 84#define PPP_XNS 0x0025 /* Xerox NS Protocol */ 85#define PPP_IPX 0x002b /* Novell IPX Protocol */ 86#define PPP_LCP 0xc021 /* Link Control Protocol */ 87#define PPP_IPCP 0x8021 /* Internet Protocol Control Protocol */ 88 89#define CONF_REQ 1 /* PPP configure request */ 90#define CONF_ACK 2 /* PPP configure acknowledge */ 91#define CONF_NAK 3 /* PPP configure negative ack */ 92#define CONF_REJ 4 /* PPP configure reject */ 93#define TERM_REQ 5 /* PPP terminate request */ 94#define TERM_ACK 6 /* PPP terminate acknowledge */ 95#define CODE_REJ 7 /* PPP code reject */ 96#define PROTO_REJ 8 /* PPP protocol reject */ 97#define ECHO_REQ 9 /* PPP echo request */ 98#define ECHO_REPLY 10 /* PPP echo reply */ 99#define DISC_REQ 11 /* PPP discard request */ 100 101#define LCP_OPT_MRU 1 /* maximum receive unit */ 102#define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 103#define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 104#define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 105#define LCP_OPT_MAGIC 5 /* magic number */ 106#define LCP_OPT_RESERVED 6 /* reserved */ 107#define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 108#define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 109 110#define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 111#define IPCP_OPT_COMPRESSION 2 /* IP compression protocol (VJ) */ 112#define IPCP_OPT_ADDRESS 3 /* local IP address */ 113 114#define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 115#define CISCO_UNICAST 0x0f /* Cisco unicast address */ 116#define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 117#define CISCO_ADDR_REQ 0 /* Cisco address request */ 118#define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 119#define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 120 121/* states are named and numbered according to RFC 1661 */ 122#define STATE_INITIAL 0 123#define STATE_STARTING 1 124#define STATE_CLOSED 2 125#define STATE_STOPPED 3 126#define STATE_CLOSING 4 127#define STATE_STOPPING 5 128#define STATE_REQ_SENT 6 129#define STATE_ACK_RCVD 7 130#define STATE_ACK_SENT 8 131#define STATE_OPENED 9 132 133struct ppp_header { 134 u_char address; 135 u_char control; 136 u_short protocol; 137}; 138#define PPP_HEADER_LEN sizeof (struct ppp_header) 139 140struct lcp_header { 141 u_char type; 142 u_char ident; 143 u_short len; 144}; 145#define LCP_HEADER_LEN sizeof (struct lcp_header) 146 147struct cisco_packet { 148 u_long type; 149 u_long par1; 150 u_long par2; 151 u_short rel; 152 u_short time0; 153 u_short time1; 154}; 155#define CISCO_PACKET_LEN 18 156 157/* 158 * We follow the spelling and capitalization of RFC 1661 here, to make 159 * it easier comparing with the standard. Please refer to this RFC in 160 * case you can't make sense out of these abbreviation; it will also 161 * explain the semantics related to the various events and actions. 162 */ 163struct cp { 164 u_short proto; /* PPP control protocol number */ 165 u_char protoidx; /* index into state table in struct sppp */ 166 u_char flags; 167#define CP_LCP 0x01 /* this is the LCP */ 168#define CP_AUTH 0x02 /* this is an authentication protocol */ 169#define CP_NCP 0x04 /* this is a NCP */ 170#define CP_QUAL 0x08 /* this is a quality reporting protocol */ 171 const char *name; /* name of this control protocol */ 172 /* event handlers */ 173 void (*Up)(struct sppp *sp); 174 void (*Down)(struct sppp *sp); 175 void (*Open)(struct sppp *sp); 176 void (*Close)(struct sppp *sp); 177 void (*TO)(void *sp); 178 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len); 179 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len); 180 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len); 181 /* actions */ 182 void (*tlu)(struct sppp *sp); 183 void (*tld)(struct sppp *sp); 184 void (*tls)(struct sppp *sp); 185 void (*tlf)(struct sppp *sp); 186 void (*scr)(struct sppp *sp); 187}; 188 189static struct sppp *spppq; 190 191/* 192 * The following disgusting hack gets around the problem that IP TOS 193 * can't be set yet. We want to put "interactive" traffic on a high 194 * priority queue. To decide if traffic is interactive, we check that 195 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 196 */ 197static u_short interactive_ports[8] = { 198 0, 513, 0, 0, 199 0, 21, 0, 23, 200}; 201#define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 202 203/* almost every function needs these */ 204#define STDDCL \ 205 struct ifnet *ifp = &sp->pp_if; \ 206 int debug = ifp->if_flags & IFF_DEBUG 207 208static int sppp_output(struct ifnet *ifp, struct mbuf *m, 209 struct sockaddr *dst, struct rtentry *rt); 210 211static void sppp_cisco_send(struct sppp *sp, int type, long par1, long par2); 212static void sppp_cisco_input(struct sppp *sp, struct mbuf *m); 213 214static void sppp_cp_input(const struct cp *cp, struct sppp *sp, 215 struct mbuf *m); 216static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 217 u_char ident, u_short len, void *data); 218static void sppp_cp_timeout(void *arg); 219static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp, 220 int newstate); 221 222static void sppp_up_event(const struct cp *cp, struct sppp *sp); 223static void sppp_down_event(const struct cp *cp, struct sppp *sp); 224static void sppp_open_event(const struct cp *cp, struct sppp *sp); 225static void sppp_close_event(const struct cp *cp, struct sppp *sp); 226static void sppp_to_event(const struct cp *cp, struct sppp *sp); 227 228static void sppp_lcp_init(struct sppp *sp); 229static void sppp_lcp_up(struct sppp *sp); 230static void sppp_lcp_down(struct sppp *sp); 231static void sppp_lcp_open(struct sppp *sp); 232static void sppp_lcp_close(struct sppp *sp); 233static void sppp_lcp_TO(void *sp); 234static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 235static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 236static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 237static void sppp_lcp_tlu(struct sppp *sp); 238static void sppp_lcp_tld(struct sppp *sp); 239static void sppp_lcp_tls(struct sppp *sp); 240static void sppp_lcp_tlf(struct sppp *sp); 241static void sppp_lcp_scr(struct sppp *sp); 242static void sppp_lcp_check(struct sppp *sp); 243 244static void sppp_ipcp_init(struct sppp *sp); 245static void sppp_ipcp_up(struct sppp *sp); 246static void sppp_ipcp_down(struct sppp *sp); 247static void sppp_ipcp_open(struct sppp *sp); 248static void sppp_ipcp_close(struct sppp *sp); 249static void sppp_ipcp_TO(void *sp); 250static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 251static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 252static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 253static void sppp_ipcp_tlu(struct sppp *sp); 254static void sppp_ipcp_tld(struct sppp *sp); 255static void sppp_ipcp_tls(struct sppp *sp); 256static void sppp_ipcp_tlf(struct sppp *sp); 257static void sppp_ipcp_scr(struct sppp *sp); 258 259static const char *sppp_cp_type_name(u_char type); 260static const char *sppp_lcp_opt_name(u_char opt); 261static const char *sppp_ipcp_opt_name(u_char opt); 262static const char *sppp_state_name(int state); 263static const char *sppp_phase_name(enum ppp_phase phase); 264static const char *sppp_proto_name(u_short proto); 265 266static void sppp_keepalive(void *dummy); 267static void sppp_qflush(struct ifqueue *ifq); 268 269static void sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst); 270static void sppp_set_ip_addr(struct sppp *sp, u_long src); 271 272static void sppp_print_bytes(u_char *p, u_short len); 273 274/* our control protocol descriptors */ 275const struct cp lcp = { 276 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 277 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close, 278 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, 279 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, 280 sppp_lcp_scr 281}; 282 283const struct cp ipcp = { 284 PPP_IPCP, IDX_IPCP, CP_NCP, "ipcp", 285 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close, 286 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, 287 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf, 288 sppp_ipcp_scr 289}; 290 291const struct cp *cps[IDX_COUNT] = { 292 &lcp, /* IDX_LCP */ 293 &ipcp, /* IDX_IPCP */ 294}; 295 296 297/* 298 * Exported functions, comprising our interface to the lower layer. 299 */ 300 301/* 302 * Process the received packet. 303 */ 304void 305sppp_input(struct ifnet *ifp, struct mbuf *m) 306{ 307 struct ppp_header *h; 308 struct ifqueue *inq = 0; 309 int s; 310 struct sppp *sp = (struct sppp *)ifp; 311 int debug = ifp->if_flags & IFF_DEBUG; 312 313 if (ifp->if_flags & IFF_UP) 314 /* Count received bytes, add FCS and one flag */ 315 ifp->if_ibytes += m->m_pkthdr.len + 3; 316 317 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 318 /* Too small packet, drop it. */ 319 if (debug) 320 log(LOG_DEBUG, 321 "%s%d: input packet is too small, %d bytes\n", 322 ifp->if_name, ifp->if_unit, m->m_pkthdr.len); 323 drop: 324 ++ifp->if_ierrors; 325 ++ifp->if_iqdrops; 326 m_freem (m); 327 return; 328 } 329 330 /* Get PPP header. */ 331 h = mtod (m, struct ppp_header*); 332 m_adj (m, PPP_HEADER_LEN); 333 334 switch (h->address) { 335 case PPP_ALLSTATIONS: 336 if (h->control != PPP_UI) 337 goto invalid; 338 if (sp->pp_flags & PP_CISCO) { 339 if (debug) 340 log(LOG_DEBUG, 341 "%s%d: PPP packet in Cisco mode " 342 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 343 ifp->if_name, ifp->if_unit, 344 h->address, h->control, ntohs(h->protocol)); 345 goto drop; 346 } 347 switch (ntohs (h->protocol)) { 348 default: 349 if (sp->state[IDX_LCP] == STATE_OPENED) 350 sppp_cp_send (sp, PPP_LCP, PROTO_REJ, 351 ++sp->pp_seq, m->m_pkthdr.len + 2, 352 &h->protocol); 353 if (debug) 354 log(LOG_DEBUG, 355 "%s%d: invalid input protocol " 356 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 357 ifp->if_name, ifp->if_unit, 358 h->address, h->control, ntohs(h->protocol)); 359 ++ifp->if_noproto; 360 goto drop; 361 case PPP_LCP: 362 sppp_cp_input(&lcp, (struct sppp*)ifp, m); 363 m_freem (m); 364 return; 365#ifdef INET 366 case PPP_IPCP: 367 if (sp->pp_phase == PHASE_NETWORK) 368 sppp_cp_input(&ipcp, (struct sppp*) ifp, m); 369 m_freem (m); 370 return; 371 case PPP_IP: 372 if (sp->state[IDX_IPCP] == STATE_OPENED) { 373 schednetisr (NETISR_IP); 374 inq = &ipintrq; 375 } 376 break; 377#endif 378#ifdef IPX 379 case PPP_IPX: 380 /* IPX IPXCP not implemented yet */ 381 if (sp->pp_phase == PHASE_NETWORK) { 382 schednetisr (NETISR_IPX); 383 inq = &ipxintrq; 384 } 385 break; 386#endif 387#ifdef NS 388 case PPP_XNS: 389 /* XNS IDPCP not implemented yet */ 390 if (sp->pp_phase == PHASE_NETWORK) { 391 schednetisr (NETISR_NS); 392 inq = &nsintrq; 393 } 394 break; 395#endif 396#ifdef ISO 397 case PPP_ISO: 398 /* OSI NLCP not implemented yet */ 399 if (sp->pp_phase == PHASE_NETWORK) { 400 schednetisr (NETISR_ISO); 401 inq = &clnlintrq; 402 } 403 break; 404#endif 405 } 406 break; 407 case CISCO_MULTICAST: 408 case CISCO_UNICAST: 409 /* Don't check the control field here (RFC 1547). */ 410 if (! (sp->pp_flags & PP_CISCO)) { 411 if (debug) 412 log(LOG_DEBUG, 413 "%s%d: Cisco packet in PPP mode " 414 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 415 ifp->if_name, ifp->if_unit, 416 h->address, h->control, ntohs(h->protocol)); 417 goto drop; 418 } 419 switch (ntohs (h->protocol)) { 420 default: 421 ++ifp->if_noproto; 422 goto invalid; 423 case CISCO_KEEPALIVE: 424 sppp_cisco_input ((struct sppp*) ifp, m); 425 m_freem (m); 426 return; 427#ifdef INET 428 case ETHERTYPE_IP: 429 schednetisr (NETISR_IP); 430 inq = &ipintrq; 431 break; 432#endif 433#ifdef IPX 434 case ETHERTYPE_IPX: 435 schednetisr (NETISR_IPX); 436 inq = &ipxintrq; 437 break; 438#endif 439#ifdef NS 440 case ETHERTYPE_NS: 441 schednetisr (NETISR_NS); 442 inq = &nsintrq; 443 break; 444#endif 445 } 446 break; 447 default: /* Invalid PPP packet. */ 448 invalid: 449 if (debug) 450 log(LOG_DEBUG, 451 "%s%d: invalid input packet " 452 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 453 ifp->if_name, ifp->if_unit, 454 h->address, h->control, ntohs(h->protocol)); 455 goto drop; 456 } 457 458 if (! (ifp->if_flags & IFF_UP) || ! inq) 459 goto drop; 460 461 /* Check queue. */ 462 s = splimp(); 463 if (IF_QFULL (inq)) { 464 /* Queue overflow. */ 465 IF_DROP(inq); 466 splx(s); 467 if (debug) 468 log(LOG_DEBUG, "%s%d: protocol queue overflow\n", 469 ifp->if_name, ifp->if_unit); 470 goto drop; 471 } 472 IF_ENQUEUE(inq, m); 473 splx(s); 474} 475 476/* 477 * Enqueue transmit packet. 478 */ 479static int 480sppp_output(struct ifnet *ifp, struct mbuf *m, 481 struct sockaddr *dst, struct rtentry *rt) 482{ 483 struct sppp *sp = (struct sppp*) ifp; 484 struct ppp_header *h; 485 struct ifqueue *ifq; 486 int s, rv = 0; 487 488 s = splimp(); 489 490 if ((ifp->if_flags & IFF_UP) == 0 || 491 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 492 m_freem (m); 493 splx (s); 494 return (ENETDOWN); 495 } 496 497 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 498 /* 499 * Interface is not yet running, but auto-dial. Need 500 * to start LCP for it. 501 */ 502 ifp->if_flags |= IFF_RUNNING; 503 splx(s); 504 lcp.Open(sp); 505 s = splimp(); 506 } 507 508 ifq = &ifp->if_snd; 509#ifdef INET 510 /* 511 * Put low delay, telnet, rlogin and ftp control packets 512 * in front of the queue. 513 */ 514 if (dst->sa_family == AF_INET) { 515 struct ip *ip = mtod (m, struct ip*); 516 struct tcphdr *tcp = (struct tcphdr*) ((long*)ip + ip->ip_hl); 517 518 if (! IF_QFULL (&sp->pp_fastq) && 519 ((ip->ip_tos & IPTOS_LOWDELAY) || 520 ip->ip_p == IPPROTO_TCP && 521 m->m_len >= sizeof (struct ip) + sizeof (struct tcphdr) && 522 (INTERACTIVE (ntohs (tcp->th_sport)) || 523 INTERACTIVE (ntohs (tcp->th_dport))))) 524 ifq = &sp->pp_fastq; 525 } 526#endif 527 528 /* 529 * Prepend general data packet PPP header. For now, IP only. 530 */ 531 M_PREPEND (m, PPP_HEADER_LEN, M_DONTWAIT); 532 if (! m) { 533 if (ifp->if_flags & IFF_DEBUG) 534 log(LOG_DEBUG, "%s%d: no memory for transmit header\n", 535 ifp->if_name, ifp->if_unit); 536 ++ifp->if_oerrors; 537 splx (s); 538 return (ENOBUFS); 539 } 540 h = mtod (m, struct ppp_header*); 541 if (sp->pp_flags & PP_CISCO) { 542 h->address = CISCO_MULTICAST; /* broadcast address */ 543 h->control = 0; 544 } else { 545 h->address = PPP_ALLSTATIONS; /* broadcast address */ 546 h->control = PPP_UI; /* Unnumbered Info */ 547 } 548 549 switch (dst->sa_family) { 550#ifdef INET 551 case AF_INET: /* Internet Protocol */ 552 if (sp->pp_flags & PP_CISCO) 553 h->protocol = htons (ETHERTYPE_IP); 554 else { 555 /* 556 * Don't choke with an ENETDOWN early. It's 557 * possible that we just started dialing out, 558 * so don't drop the packet immediately. If 559 * we notice that we run out of buffer space 560 * below, we will however remember that we are 561 * not ready to carry IP packets, and return 562 * ENETDOWN, as opposed to ENOBUFS. 563 */ 564 h->protocol = htons(PPP_IP); 565 if (sp->state[IDX_IPCP] != STATE_OPENED) 566 rv = ENETDOWN; 567 } 568 break; 569#endif 570#ifdef NS 571 case AF_NS: /* Xerox NS Protocol */ 572 h->protocol = htons ((sp->pp_flags & PP_CISCO) ? 573 ETHERTYPE_NS : PPP_XNS); 574 break; 575#endif 576#ifdef IPX 577 case AF_IPX: /* Novell IPX Protocol */ 578 h->protocol = htons ((sp->pp_flags & PP_CISCO) ? 579 ETHERTYPE_IPX : PPP_IPX); 580 break; 581#endif 582#ifdef ISO 583 case AF_ISO: /* ISO OSI Protocol */ 584 if (sp->pp_flags & PP_CISCO) 585 goto nosupport; 586 h->protocol = htons (PPP_ISO); 587 break; 588nosupport: 589#endif 590 default: 591 m_freem (m); 592 ++ifp->if_oerrors; 593 splx (s); 594 return (EAFNOSUPPORT); 595 } 596 597 /* 598 * Queue message on interface, and start output if interface 599 * not yet active. 600 */ 601 if (IF_QFULL (ifq)) { 602 IF_DROP (&ifp->if_snd); 603 m_freem (m); 604 ++ifp->if_oerrors; 605 splx (s); 606 return (rv? rv: ENOBUFS); 607 } 608 IF_ENQUEUE (ifq, m); 609 if (! (ifp->if_flags & IFF_OACTIVE)) 610 (*ifp->if_start) (ifp); 611 612 /* 613 * Count output packets and bytes. 614 * The packet length includes header, FCS and 1 flag, 615 * according to RFC 1333. 616 */ 617 ifp->if_obytes += m->m_pkthdr.len + 3; 618 splx (s); 619 return (0); 620} 621 622void 623sppp_attach(struct ifnet *ifp) 624{ 625 struct sppp *sp = (struct sppp*) ifp; 626 627 /* Initialize keepalive handler. */ 628 if (! spppq) 629 timeout (sppp_keepalive, 0, hz * 10); 630 631 /* Insert new entry into the keepalive list. */ 632 sp->pp_next = spppq; 633 spppq = sp; 634 635 sp->pp_if.if_type = IFT_PPP; 636 sp->pp_if.if_output = sppp_output; 637 sp->pp_fastq.ifq_maxlen = 32; 638 sp->pp_cpq.ifq_maxlen = 20; 639 sp->pp_loopcnt = 0; 640 sp->pp_alivecnt = 0; 641 sp->pp_seq = 0; 642 sp->pp_rseq = 0; 643 sp->pp_phase = PHASE_DEAD; 644 sp->pp_up = lcp.Up; 645 sp->pp_down = lcp.Down; 646 647 sppp_lcp_init(sp); 648 sppp_ipcp_init(sp); 649} 650 651void 652sppp_detach(struct ifnet *ifp) 653{ 654 struct sppp **q, *p, *sp = (struct sppp*) ifp; 655 int i; 656 657 /* Remove the entry from the keepalive list. */ 658 for (q = &spppq; (p = *q); q = &p->pp_next) 659 if (p == sp) { 660 *q = p->pp_next; 661 break; 662 } 663 664 /* Stop keepalive handler. */ 665 if (! spppq) 666 untimeout (sppp_keepalive, 0); 667 668 for (i = 0; i < IDX_COUNT; i++) 669 untimeout((cps[i])->TO, (void *)sp); 670} 671 672/* 673 * Flush the interface output queue. 674 */ 675void 676sppp_flush(struct ifnet *ifp) 677{ 678 struct sppp *sp = (struct sppp*) ifp; 679 680 sppp_qflush (&sp->pp_if.if_snd); 681 sppp_qflush (&sp->pp_fastq); 682 sppp_qflush (&sp->pp_cpq); 683} 684 685/* 686 * Check if the output queue is empty. 687 */ 688int 689sppp_isempty(struct ifnet *ifp) 690{ 691 struct sppp *sp = (struct sppp*) ifp; 692 int empty, s; 693 694 s = splimp(); 695 empty = !sp->pp_fastq.ifq_head && !sp->pp_cpq.ifq_head && 696 !sp->pp_if.if_snd.ifq_head; 697 splx(s); 698 return (empty); 699} 700 701/* 702 * Get next packet to send. 703 */ 704struct mbuf * 705sppp_dequeue(struct ifnet *ifp) 706{ 707 struct sppp *sp = (struct sppp*) ifp; 708 struct mbuf *m; 709 int s; 710 711 s = splimp(); 712 /* 713 * Process only the control protocol queue until we are in 714 * network phase. 715 * 716 * XXX Network phase itself is still not a sufficient test, we 717 * normally should keep a separate queue for each supported 718 * protocol family, and only serve these queues as the 719 * respective NCPs were opened. The simplistic logic used 720 * here might cause some loss of network traffic while the 721 * NCPs are being negotiated, in particular if the NCPs take a 722 * long time to negotiate. 723 * 724 * Do always serve all three queues in Cisco mode. 725 */ 726 IF_DEQUEUE(&sp->pp_cpq, m); 727 if (m == NULL && 728 (sp->pp_phase == PHASE_NETWORK || 729 (sp->pp_flags & PP_CISCO) != 0)) { 730 IF_DEQUEUE(&sp->pp_fastq, m); 731 if (m == NULL) 732 IF_DEQUEUE (&sp->pp_if.if_snd, m); 733 } 734 splx(s); 735 return m; 736} 737 738/* 739 * Process an ioctl request. Called on low priority level. 740 */ 741int 742sppp_ioctl(struct ifnet *ifp, int cmd, void *data) 743{ 744 struct ifreq *ifr = (struct ifreq*) data; 745 struct sppp *sp = (struct sppp*) ifp; 746 int s, going_up, going_down, newmode; 747 748 s = splimp(); 749 switch (cmd) { 750 case SIOCAIFADDR: 751 case SIOCSIFDSTADDR: 752 break; 753 754 case SIOCSIFADDR: 755 if_up(ifp); 756 /* fall through... */ 757 758 case SIOCSIFFLAGS: 759 going_up = ifp->if_flags & IFF_UP && 760 (ifp->if_flags & IFF_RUNNING) == 0; 761 going_down = (ifp->if_flags & IFF_UP) == 0 && 762 ifp->if_flags & IFF_RUNNING; 763 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 764 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 765 /* sanity */ 766 newmode = IFF_PASSIVE; 767 ifp->if_flags &= ~IFF_AUTO; 768 } 769 770 if (going_up || going_down) 771 lcp.Close(sp); 772 if (going_up && newmode == 0) { 773 /* neither auto-dial nor passive */ 774 ifp->if_flags |= IFF_RUNNING; 775 if (!(sp->pp_flags & PP_CISCO)) 776 lcp.Open(sp); 777 } else if (going_down) { 778 sppp_flush(ifp); 779 ifp->if_flags &= ~IFF_RUNNING; 780 } 781 782 break; 783 784#ifdef SIOCSIFMTU 785#ifndef ifr_mtu 786#define ifr_mtu ifr_metric 787#endif 788 case SIOCSIFMTU: 789 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru) 790 return (EINVAL); 791 ifp->if_mtu = ifr->ifr_mtu; 792 break; 793#endif 794#ifdef SLIOCSETMTU 795 case SLIOCSETMTU: 796 if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru) 797 return (EINVAL); 798 ifp->if_mtu = *(short*)data; 799 break; 800#endif 801#ifdef SIOCGIFMTU 802 case SIOCGIFMTU: 803 ifr->ifr_mtu = ifp->if_mtu; 804 break; 805#endif 806#ifdef SLIOCGETMTU 807 case SLIOCGETMTU: 808 *(short*)data = ifp->if_mtu; 809 break; 810#endif 811 case SIOCADDMULTI: 812 case SIOCDELMULTI: 813 break; 814 815 default: 816 splx(s); 817 return (ENOTTY); 818 } 819 splx(s); 820 return (0); 821} 822 823 824/* 825 * Cisco framing implementation. 826 */ 827 828/* 829 * Handle incoming Cisco keepalive protocol packets. 830 */ 831static void 832sppp_cisco_input(struct sppp *sp, struct mbuf *m) 833{ 834 STDDCL; 835 struct cisco_packet *h; 836 struct ifaddr *ifa; 837 838 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 839 if (debug) 840 log(LOG_DEBUG, 841 "%s%d: invalid cisco packet length: %d bytes\n", 842 ifp->if_name, ifp->if_unit, m->m_pkthdr.len); 843 return; 844 } 845 h = mtod (m, struct cisco_packet*); 846 if (debug) 847 log(LOG_DEBUG, 848 "%s%d: cisco input: %d bytes " 849 "<0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n", 850 ifp->if_name, ifp->if_unit, m->m_pkthdr.len, 851 ntohl (h->type), h->par1, h->par2, h->rel, 852 h->time0, h->time1); 853 switch (ntohl (h->type)) { 854 default: 855 if (debug) 856 addlog("%s%d: unknown cisco packet type: 0x%lx\n", 857 ifp->if_name, ifp->if_unit, ntohl (h->type)); 858 break; 859 case CISCO_ADDR_REPLY: 860 /* Reply on address request, ignore */ 861 break; 862 case CISCO_KEEPALIVE_REQ: 863 sp->pp_alivecnt = 0; 864 sp->pp_rseq = ntohl (h->par1); 865 if (sp->pp_seq == sp->pp_rseq) { 866 /* Local and remote sequence numbers are equal. 867 * Probably, the line is in loopback mode. */ 868 if (sp->pp_loopcnt >= MAXALIVECNT) { 869 printf ("%s%d: loopback\n", 870 ifp->if_name, ifp->if_unit); 871 sp->pp_loopcnt = 0; 872 if (ifp->if_flags & IFF_UP) { 873 if_down (ifp); 874 sppp_qflush (&sp->pp_cpq); 875 } 876 } 877 ++sp->pp_loopcnt; 878 879 /* Generate new local sequence number */ 880 sp->pp_seq ^= time.tv_sec ^ time.tv_usec; 881 break; 882 } 883 sp->pp_loopcnt = 0; 884 if (! (ifp->if_flags & IFF_UP) && 885 (ifp->if_flags & IFF_RUNNING)) { 886 ifp->if_flags |= IFF_UP; 887 printf ("%s%d: up\n", ifp->if_name, ifp->if_unit); 888 } 889 break; 890 case CISCO_ADDR_REQ: 891 for (ifa=ifp->if_addrhead.tqh_first; ifa; 892 ifa=ifa->ifa_link.tqe_next) 893 if (ifa->ifa_addr->sa_family == AF_INET) 894 break; 895 if (! ifa) { 896 if (debug) 897 addlog("%s%d: unknown address for cisco request\n", 898 ifp->if_name, ifp->if_unit); 899 return; 900 } 901 sppp_cisco_send (sp, CISCO_ADDR_REPLY, 902 ntohl (((struct sockaddr_in*)ifa->ifa_addr)->sin_addr.s_addr), 903 ntohl (((struct sockaddr_in*)ifa->ifa_netmask)->sin_addr.s_addr)); 904 break; 905 } 906} 907 908/* 909 * Send Cisco keepalive packet. 910 */ 911static void 912sppp_cisco_send(struct sppp *sp, int type, long par1, long par2) 913{ 914 STDDCL; 915 struct ppp_header *h; 916 struct cisco_packet *ch; 917 struct mbuf *m; 918 u_long t = (time.tv_sec - boottime.tv_sec) * 1000; 919 920 MGETHDR (m, M_DONTWAIT, MT_DATA); 921 if (! m) 922 return; 923 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 924 m->m_pkthdr.rcvif = 0; 925 926 h = mtod (m, struct ppp_header*); 927 h->address = CISCO_MULTICAST; 928 h->control = 0; 929 h->protocol = htons (CISCO_KEEPALIVE); 930 931 ch = (struct cisco_packet*) (h + 1); 932 ch->type = htonl (type); 933 ch->par1 = htonl (par1); 934 ch->par2 = htonl (par2); 935 ch->rel = -1; 936 ch->time0 = htons ((u_short) (t >> 16)); 937 ch->time1 = htons ((u_short) t); 938 939 if (debug) 940 log(LOG_DEBUG, 941 "%s%d: cisco output: <0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n", 942 ifp->if_name, ifp->if_unit, ntohl (ch->type), ch->par1, 943 ch->par2, ch->rel, ch->time0, ch->time1); 944 945 if (IF_QFULL (&sp->pp_cpq)) { 946 IF_DROP (&sp->pp_fastq); 947 IF_DROP (&ifp->if_snd); 948 m_freem (m); 949 } else 950 IF_ENQUEUE (&sp->pp_cpq, m); 951 if (! (ifp->if_flags & IFF_OACTIVE)) 952 (*ifp->if_start) (ifp); 953 ifp->if_obytes += m->m_pkthdr.len + 3; 954} 955 956/* 957 * PPP protocol implementation. 958 */ 959 960/* 961 * Send PPP control protocol packet. 962 */ 963static void 964sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 965 u_char ident, u_short len, void *data) 966{ 967 STDDCL; 968 struct ppp_header *h; 969 struct lcp_header *lh; 970 struct mbuf *m; 971 972 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN) 973 len = MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN; 974 MGETHDR (m, M_DONTWAIT, MT_DATA); 975 if (! m) 976 return; 977 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len; 978 m->m_pkthdr.rcvif = 0; 979 980 h = mtod (m, struct ppp_header*); 981 h->address = PPP_ALLSTATIONS; /* broadcast address */ 982 h->control = PPP_UI; /* Unnumbered Info */ 983 h->protocol = htons (proto); /* Link Control Protocol */ 984 985 lh = (struct lcp_header*) (h + 1); 986 lh->type = type; 987 lh->ident = ident; 988 lh->len = htons (LCP_HEADER_LEN + len); 989 if (len) 990 bcopy (data, lh+1, len); 991 992 if (debug) { 993 log(LOG_DEBUG, "%s%d: %s output <%s id=0x%x len=%d", 994 ifp->if_name, ifp->if_unit, 995 sppp_proto_name(proto), 996 sppp_cp_type_name (lh->type), lh->ident, 997 ntohs (lh->len)); 998 if (len) 999 sppp_print_bytes ((u_char*) (lh+1), len); 1000 addlog(">\n"); 1001 } 1002 if (IF_QFULL (&sp->pp_cpq)) { 1003 IF_DROP (&sp->pp_fastq); 1004 IF_DROP (&ifp->if_snd); 1005 m_freem (m); 1006 ++ifp->if_oerrors; 1007 } else 1008 IF_ENQUEUE (&sp->pp_cpq, m); 1009 if (! (ifp->if_flags & IFF_OACTIVE)) 1010 (*ifp->if_start) (ifp); 1011 ifp->if_obytes += m->m_pkthdr.len + 3; 1012} 1013 1014/* 1015 * Handle incoming PPP control protocol packets. 1016 */ 1017static void 1018sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1019{ 1020 STDDCL; 1021 struct lcp_header *h; 1022 int len = m->m_pkthdr.len; 1023 int rv; 1024 u_char *p; 1025 1026 if (len < 4) { 1027 if (debug) 1028 log(LOG_DEBUG, 1029 "%s%d: %s invalid packet length: %d bytes\n", 1030 ifp->if_name, ifp->if_unit, cp->name, len); 1031 return; 1032 } 1033 h = mtod (m, struct lcp_header*); 1034 if (debug) { 1035 log(LOG_DEBUG, 1036 "%s%d: %s input(%s): <%s id=0x%x len=%d", 1037 ifp->if_name, ifp->if_unit, cp->name, 1038 sppp_state_name(sp->state[cp->protoidx]), 1039 sppp_cp_type_name (h->type), h->ident, ntohs (h->len)); 1040 if (len > 4) 1041 sppp_print_bytes ((u_char*) (h+1), len-4); 1042 addlog(">\n"); 1043 } 1044 if (len > ntohs (h->len)) 1045 len = ntohs (h->len); 1046 switch (h->type) { 1047 case CONF_REQ: 1048 if (len < 4) { 1049 if (debug) 1050 addlog("%s%d: %s invalid conf-req length %d\n", 1051 ifp->if_name, ifp->if_unit, cp->name, 1052 len); 1053 ++ifp->if_ierrors; 1054 break; 1055 } 1056 rv = (cp->RCR)(sp, h, len); 1057 switch (sp->state[cp->protoidx]) { 1058 case STATE_OPENED: 1059 (cp->tld)(sp); 1060 (cp->scr)(sp); 1061 /* fall through... */ 1062 case STATE_ACK_SENT: 1063 case STATE_REQ_SENT: 1064 sppp_cp_change_state(cp, sp, rv? 1065 STATE_ACK_SENT: STATE_REQ_SENT); 1066 break; 1067 case STATE_CLOSING: 1068 case STATE_STOPPING: 1069 break; 1070 case STATE_STOPPED: 1071 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1072 (cp->scr)(sp); 1073 sppp_cp_change_state(cp, sp, rv? 1074 STATE_ACK_SENT: STATE_REQ_SENT); 1075 break; 1076 case STATE_CLOSED: 1077 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1078 0, 0); 1079 break; 1080 case STATE_ACK_RCVD: 1081 if (rv) { 1082 sppp_cp_change_state(cp, sp, STATE_OPENED); 1083 if (debug) 1084 log(LOG_DEBUG, "%s%d: %s tlu\n", 1085 ifp->if_name, ifp->if_unit, 1086 cp->name); 1087 (cp->tlu)(sp); 1088 } else 1089 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1090 break; 1091 default: 1092 printf("%s%d: %s illegal %s in state %s\n", 1093 ifp->if_name, ifp->if_unit, cp->name, 1094 sppp_cp_type_name(h->type), 1095 sppp_state_name(sp->state[cp->protoidx])); 1096 ++ifp->if_ierrors; 1097 } 1098 break; 1099 case CONF_ACK: 1100 if (h->ident != sp->confid[cp->protoidx]) { 1101 if (debug) 1102 addlog("%s%d: %s id mismatch 0x%x != 0x%x\n", 1103 ifp->if_name, ifp->if_unit, cp->name, 1104 h->ident, sp->confid[cp->protoidx]); 1105 ++ifp->if_ierrors; 1106 break; 1107 } 1108 switch (sp->state[cp->protoidx]) { 1109 case STATE_CLOSED: 1110 case STATE_STOPPED: 1111 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1112 break; 1113 case STATE_CLOSING: 1114 case STATE_STOPPING: 1115 break; 1116 case STATE_REQ_SENT: 1117 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1118 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1119 break; 1120 case STATE_OPENED: 1121 (cp->tld)(sp); 1122 /* fall through */ 1123 case STATE_ACK_RCVD: 1124 (cp->scr)(sp); 1125 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1126 break; 1127 case STATE_ACK_SENT: 1128 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1129 sppp_cp_change_state(cp, sp, STATE_OPENED); 1130 if (debug) 1131 addlog("%s%d: %s tlu\n", 1132 ifp->if_name, ifp->if_unit, cp->name); 1133 (cp->tlu)(sp); 1134 break; 1135 default: 1136 printf("%s%d: %s illegal %s in state %s\n", 1137 ifp->if_name, ifp->if_unit, cp->name, 1138 sppp_cp_type_name(h->type), 1139 sppp_state_name(sp->state[cp->protoidx])); 1140 ++ifp->if_ierrors; 1141 } 1142 break; 1143 case CONF_NAK: 1144 case CONF_REJ: 1145 if (h->ident != sp->confid[cp->protoidx]) { 1146 if (debug) 1147 addlog("%s%d: %s id mismatch 0x%x != 0x%x\n", 1148 ifp->if_name, ifp->if_unit, cp->name, 1149 h->ident, sp->confid[cp->protoidx]); 1150 ++ifp->if_ierrors; 1151 break; 1152 } 1153 if (h->type == CONF_NAK) 1154 (cp->RCN_nak)(sp, h, len); 1155 else /* CONF_REJ */ 1156 (cp->RCN_rej)(sp, h, len); 1157 1158 switch (sp->state[cp->protoidx]) { 1159 case STATE_CLOSED: 1160 case STATE_STOPPED: 1161 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1162 break; 1163 case STATE_REQ_SENT: 1164 case STATE_ACK_SENT: 1165 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1166 (cp->scr)(sp); 1167 break; 1168 case STATE_OPENED: 1169 (cp->tld)(sp); 1170 /* fall through */ 1171 case STATE_ACK_RCVD: 1172 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1173 (cp->scr)(sp); 1174 break; 1175 case STATE_CLOSING: 1176 case STATE_STOPPING: 1177 break; 1178 default: 1179 printf("%s%d: %s illegal %s in state %s\n", 1180 ifp->if_name, ifp->if_unit, cp->name, 1181 sppp_cp_type_name(h->type), 1182 sppp_state_name(sp->state[cp->protoidx])); 1183 ++ifp->if_ierrors; 1184 } 1185 break; 1186 1187 case TERM_REQ: 1188 switch (sp->state[cp->protoidx]) { 1189 case STATE_ACK_RCVD: 1190 case STATE_ACK_SENT: 1191 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1192 /* fall through */ 1193 case STATE_CLOSED: 1194 case STATE_STOPPED: 1195 case STATE_CLOSING: 1196 case STATE_STOPPING: 1197 case STATE_REQ_SENT: 1198 sta: 1199 /* Send Terminate-Ack packet. */ 1200 if (debug) 1201 log(LOG_DEBUG, "%s%d: %s send terminate-ack\n", 1202 ifp->if_name, ifp->if_unit, cp->name); 1203 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1204 break; 1205 case STATE_OPENED: 1206 (cp->tld)(sp); 1207 sp->rst_counter[cp->protoidx] = 0; 1208 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1209 goto sta; 1210 break; 1211 default: 1212 printf("%s%d: %s illegal %s in state %s\n", 1213 ifp->if_name, ifp->if_unit, cp->name, 1214 sppp_cp_type_name(h->type), 1215 sppp_state_name(sp->state[cp->protoidx])); 1216 ++ifp->if_ierrors; 1217 } 1218 break; 1219 case TERM_ACK: 1220 switch (sp->state[cp->protoidx]) { 1221 case STATE_CLOSED: 1222 case STATE_STOPPED: 1223 case STATE_REQ_SENT: 1224 case STATE_ACK_SENT: 1225 break; 1226 case STATE_CLOSING: 1227 (cp->tlf)(sp); 1228 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1229 break; 1230 case STATE_STOPPING: 1231 (cp->tlf)(sp); 1232 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1233 break; 1234 case STATE_ACK_RCVD: 1235 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1236 break; 1237 case STATE_OPENED: 1238 (cp->tld)(sp); 1239 (cp->scr)(sp); 1240 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1241 break; 1242 default: 1243 printf("%s%d: %s illegal %s in state %s\n", 1244 ifp->if_name, ifp->if_unit, cp->name, 1245 sppp_cp_type_name(h->type), 1246 sppp_state_name(sp->state[cp->protoidx])); 1247 ++ifp->if_ierrors; 1248 } 1249 break; 1250 case CODE_REJ: 1251 case PROTO_REJ: 1252 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1253 switch (sp->state[cp->protoidx]) { 1254 case STATE_CLOSED: 1255 case STATE_STOPPED: 1256 case STATE_REQ_SENT: 1257 case STATE_ACK_SENT: 1258 case STATE_CLOSING: 1259 case STATE_STOPPING: 1260 case STATE_OPENED: 1261 break; 1262 case STATE_ACK_RCVD: 1263 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1264 break; 1265 default: 1266 printf("%s%d: %s illegal %s in state %s\n", 1267 ifp->if_name, ifp->if_unit, cp->name, 1268 sppp_cp_type_name(h->type), 1269 sppp_state_name(sp->state[cp->protoidx])); 1270 ++ifp->if_ierrors; 1271 } 1272 break; 1273 case DISC_REQ: 1274 if (cp->proto != PPP_LCP) 1275 goto illegal; 1276 /* Discard the packet. */ 1277 break; 1278 case ECHO_REQ: 1279 if (cp->proto != PPP_LCP) 1280 goto illegal; 1281 if (sp->state[cp->protoidx] != STATE_OPENED) { 1282 if (debug) 1283 addlog("%s%d: lcp echo req but lcp closed\n", 1284 ifp->if_name, ifp->if_unit); 1285 ++ifp->if_ierrors; 1286 break; 1287 } 1288 if (len < 8) { 1289 if (debug) 1290 addlog("%s%d: invalid lcp echo request " 1291 "packet length: %d bytes\n", 1292 ifp->if_name, ifp->if_unit, len); 1293 break; 1294 } 1295 if (ntohl (*(long*)(h+1)) == sp->lcp.magic) { 1296 /* Line loopback mode detected. */ 1297 printf("%s%d: loopback\n", ifp->if_name, ifp->if_unit); 1298 if_down (ifp); 1299 sppp_qflush (&sp->pp_cpq); 1300 1301 /* Shut down the PPP link. */ 1302 /* XXX */ 1303 lcp.Down(sp); 1304 lcp.Up(sp); 1305 break; 1306 } 1307 *(long*)(h+1) = htonl (sp->lcp.magic); 1308 if (debug) 1309 addlog("%s%d: got lcp echo req, sending echo rep\n", 1310 ifp->if_name, ifp->if_unit); 1311 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1); 1312 break; 1313 case ECHO_REPLY: 1314 if (cp->proto != PPP_LCP) 1315 goto illegal; 1316 if (h->ident != sp->lcp.echoid) { 1317 ++ifp->if_ierrors; 1318 break; 1319 } 1320 if (len < 8) { 1321 if (debug) 1322 addlog("%s%d: lcp invalid echo reply " 1323 "packet length: %d bytes\n", 1324 ifp->if_name, ifp->if_unit, len); 1325 break; 1326 } 1327 if (debug) 1328 addlog("%s%d: lcp got echo rep\n", 1329 ifp->if_name, ifp->if_unit); 1330 if (ntohl (*(long*)(h+1)) != sp->lcp.magic) 1331 sp->pp_alivecnt = 0; 1332 break; 1333 default: 1334 /* Unknown packet type -- send Code-Reject packet. */ 1335 illegal: 1336 if (debug) 1337 addlog("%s%d: %c send code-rej for 0x%x\n", 1338 ifp->if_name, ifp->if_unit, cp->name, h->type); 1339 sppp_cp_send(sp, cp->proto, CODE_REJ, ++sp->pp_seq, 1340 m->m_pkthdr.len, h); 1341 ++ifp->if_ierrors; 1342 } 1343} 1344 1345 1346/* 1347 * The generic part of all Up/Down/Open/Close/TO event handlers. 1348 * Basically, the state transition handling in the automaton. 1349 */ 1350static void 1351sppp_up_event(const struct cp *cp, struct sppp *sp) 1352{ 1353 STDDCL; 1354 1355 if (debug) 1356 log(LOG_DEBUG, "%s%d: %s up(%s)\n", 1357 ifp->if_name, ifp->if_unit, cp->name, 1358 sppp_state_name(sp->state[cp->protoidx])); 1359 1360 switch (sp->state[cp->protoidx]) { 1361 case STATE_INITIAL: 1362 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1363 break; 1364 case STATE_STARTING: 1365 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1366 (cp->scr)(sp); 1367 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1368 break; 1369 default: 1370 printf("%s%d: %s illegal up in state %s\n", 1371 ifp->if_name, ifp->if_unit, cp->name, 1372 sppp_state_name(sp->state[cp->protoidx])); 1373 } 1374} 1375 1376static void 1377sppp_down_event(const struct cp *cp, struct sppp *sp) 1378{ 1379 STDDCL; 1380 1381 if (debug) 1382 log(LOG_DEBUG, "%s%d: %s down(%s)\n", 1383 ifp->if_name, ifp->if_unit, cp->name, 1384 sppp_state_name(sp->state[cp->protoidx])); 1385 1386 switch (sp->state[cp->protoidx]) { 1387 case STATE_CLOSED: 1388 case STATE_CLOSING: 1389 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1390 break; 1391 case STATE_STOPPED: 1392 (cp->tls)(sp); 1393 /* fall through */ 1394 case STATE_STOPPING: 1395 case STATE_REQ_SENT: 1396 case STATE_ACK_RCVD: 1397 case STATE_ACK_SENT: 1398 sppp_cp_change_state(cp, sp, STATE_STARTING); 1399 break; 1400 case STATE_OPENED: 1401 (cp->tld)(sp); 1402 sppp_cp_change_state(cp, sp, STATE_STARTING); 1403 break; 1404 default: 1405 printf("%s%d: %s illegal down in state %s\n", 1406 ifp->if_name, ifp->if_unit, cp->name, 1407 sppp_state_name(sp->state[cp->protoidx])); 1408 } 1409} 1410 1411 1412static void 1413sppp_open_event(const struct cp *cp, struct sppp *sp) 1414{ 1415 STDDCL; 1416 1417 if (debug) 1418 log(LOG_DEBUG, "%s%d: %s open(%s)\n", 1419 ifp->if_name, ifp->if_unit, cp->name, 1420 sppp_state_name(sp->state[cp->protoidx])); 1421 1422 switch (sp->state[cp->protoidx]) { 1423 case STATE_INITIAL: 1424 (cp->tls)(sp); 1425 sppp_cp_change_state(cp, sp, STATE_STARTING); 1426 break; 1427 case STATE_STARTING: 1428 break; 1429 case STATE_CLOSED: 1430 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1431 (cp->scr)(sp); 1432 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1433 break; 1434 case STATE_STOPPED: 1435 case STATE_STOPPING: 1436 case STATE_REQ_SENT: 1437 case STATE_ACK_RCVD: 1438 case STATE_ACK_SENT: 1439 case STATE_OPENED: 1440 break; 1441 case STATE_CLOSING: 1442 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1443 break; 1444 } 1445} 1446 1447 1448static void 1449sppp_close_event(const struct cp *cp, struct sppp *sp) 1450{ 1451 STDDCL; 1452 1453 if (debug) 1454 log(LOG_DEBUG, "%s%d: %s close(%s)\n", 1455 ifp->if_name, ifp->if_unit, cp->name, 1456 sppp_state_name(sp->state[cp->protoidx])); 1457 1458 switch (sp->state[cp->protoidx]) { 1459 case STATE_INITIAL: 1460 case STATE_CLOSED: 1461 case STATE_CLOSING: 1462 break; 1463 case STATE_STARTING: 1464 (cp->tlf)(sp); 1465 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1466 break; 1467 case STATE_STOPPED: 1468 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1469 break; 1470 case STATE_STOPPING: 1471 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1472 break; 1473 case STATE_OPENED: 1474 (cp->tld)(sp); 1475 /* fall through */ 1476 case STATE_REQ_SENT: 1477 case STATE_ACK_RCVD: 1478 case STATE_ACK_SENT: 1479 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 1480 sppp_cp_send(sp, cp->proto, TERM_REQ, ++sp->pp_seq, 0, 0); 1481 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1482 break; 1483 } 1484} 1485 1486static void 1487sppp_to_event(const struct cp *cp, struct sppp *sp) 1488{ 1489 STDDCL; 1490 int s; 1491 1492 s = splimp(); 1493 if (debug) 1494 log(LOG_DEBUG, "%s%d: %s TO(%s) rst_counter = %d\n", 1495 ifp->if_name, ifp->if_unit, cp->name, 1496 sppp_state_name(sp->state[cp->protoidx]), 1497 sp->rst_counter[cp->protoidx]); 1498 1499 if (--sp->rst_counter[cp->protoidx] < 0) 1500 /* TO- event */ 1501 switch (sp->state[cp->protoidx]) { 1502 case STATE_CLOSING: 1503 (cp->tlf)(sp); 1504 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1505 break; 1506 case STATE_STOPPING: 1507 (cp->tlf)(sp); 1508 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1509 break; 1510 case STATE_REQ_SENT: 1511 case STATE_ACK_RCVD: 1512 case STATE_ACK_SENT: 1513 (cp->tlf)(sp); 1514 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1515 break; 1516 } 1517 else 1518 /* TO+ event */ 1519 switch (sp->state[cp->protoidx]) { 1520 case STATE_CLOSING: 1521 case STATE_STOPPING: 1522 sppp_cp_send(sp, cp->proto, TERM_REQ, ++sp->pp_seq, 1523 0, 0); 1524 timeout(cp->TO, (void *)sp, sp->lcp.timeout); 1525 break; 1526 case STATE_REQ_SENT: 1527 case STATE_ACK_RCVD: 1528 (cp->scr)(sp); 1529 /* sppp_cp_change_state() will restart the timer */ 1530 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1531 break; 1532 case STATE_ACK_SENT: 1533 (cp->scr)(sp); 1534 timeout(cp->TO, (void *)sp, sp->lcp.timeout); 1535 break; 1536 } 1537 1538 splx(s); 1539} 1540 1541/* 1542 * Change the state of a control protocol in the state automaton. 1543 * Takes care of starting/stopping the restart timer. 1544 */ 1545void 1546sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 1547{ 1548 sp->state[cp->protoidx] = newstate; 1549 1550 untimeout(cp->TO, (void *)sp); 1551 switch (newstate) { 1552 case STATE_INITIAL: 1553 case STATE_STARTING: 1554 case STATE_CLOSED: 1555 case STATE_STOPPED: 1556 case STATE_OPENED: 1557 break; 1558 case STATE_CLOSING: 1559 case STATE_STOPPING: 1560 case STATE_REQ_SENT: 1561 case STATE_ACK_RCVD: 1562 case STATE_ACK_SENT: 1563 timeout(cp->TO, (void *)sp, sp->lcp.timeout); 1564 break; 1565 } 1566} 1567/* 1568 *--------------------------------------------------------------------------* 1569 * * 1570 * The LCP implementation. * 1571 * * 1572 *--------------------------------------------------------------------------* 1573 */ 1574static void 1575sppp_lcp_init(struct sppp *sp) 1576{ 1577 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 1578 sp->lcp.magic = 0; 1579 sp->state[IDX_LCP] = STATE_INITIAL; 1580 sp->fail_counter[IDX_LCP] = 0; 1581 sp->lcp.protos = 0; 1582 sp->lcp.mru = sp->lcp.their_mru = PP_MTU; 1583 1584 /* 1585 * Initialize counters and timeout values. Note that we don't 1586 * use the 3 seconds suggested in RFC 1661 since we are likely 1587 * running on a fast link. XXX We should probably implement 1588 * the exponential backoff option. Note that these values are 1589 * relevant for all control protocols, not just LCP only. 1590 */ 1591 sp->lcp.timeout = 1 * hz; 1592 sp->lcp.max_terminate = 2; 1593 sp->lcp.max_configure = 10; 1594 sp->lcp.max_failure = 10; 1595} 1596 1597static void 1598sppp_lcp_up(struct sppp *sp) 1599{ 1600 STDDCL; 1601 1602 /* 1603 * If this interface is passive or dial-on-demand, it means 1604 * we've got in incoming call. Activate the interface. 1605 */ 1606 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 1607 if (debug) 1608 log(LOG_DEBUG, 1609 "%s%d: Up event (incoming call)\n", 1610 ifp->if_name, ifp->if_unit); 1611 ifp->if_flags |= IFF_RUNNING; 1612 lcp.Open(sp); 1613 } 1614 1615 sppp_up_event(&lcp, sp); 1616} 1617 1618static void 1619sppp_lcp_down(struct sppp *sp) 1620{ 1621 STDDCL; 1622 1623 sppp_down_event(&lcp, sp); 1624 1625 /* 1626 * If this is neither a dial-on-demand nor a passive 1627 * interface, simulate an ``ifconfig down'' action, so the 1628 * administrator can force a redial by another ``ifconfig 1629 * up''. XXX For leased line operation, should we immediately 1630 * try to reopen the connection here? 1631 */ 1632 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 1633 log(LOG_INFO, 1634 "%s%d: Down event (carrier loss), taking interface down.\n", 1635 ifp->if_name, ifp->if_unit); 1636 if_down(ifp); 1637 } else { 1638 if (debug) 1639 log(LOG_DEBUG, 1640 "%s%d: Down event (carrier loss)\n", 1641 ifp->if_name, ifp->if_unit); 1642 } 1643 lcp.Close(sp); 1644 ifp->if_flags &= ~IFF_RUNNING; 1645} 1646 1647static void 1648sppp_lcp_open(struct sppp *sp) 1649{ 1650 sppp_open_event(&lcp, sp); 1651} 1652 1653static void 1654sppp_lcp_close(struct sppp *sp) 1655{ 1656 sppp_close_event(&lcp, sp); 1657} 1658 1659static void 1660sppp_lcp_TO(void *cookie) 1661{ 1662 sppp_to_event(&lcp, (struct sppp *)cookie); 1663} 1664 1665/* 1666 * Analyze a configure request. Return true if it was agreeable, and 1667 * caused action sca, false if it has been rejected or nak'ed, and 1668 * caused action scn. (The return value is used to make the state 1669 * transition decision in the state automaton.) 1670 */ 1671static int 1672sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 1673{ 1674 STDDCL; 1675 u_char *buf, *r, *p; 1676 int origlen, rlen; 1677 u_long nmagic; 1678 1679 len -= 4; 1680 origlen = len; 1681 buf = r = malloc (len, M_TEMP, M_NOWAIT); 1682 if (! buf) 1683 return (0); 1684 1685 if (debug) 1686 log(LOG_DEBUG, "%s%d: lcp parse opts: ", 1687 ifp->if_name, ifp->if_unit); 1688 1689 /* pass 1: check for things that need to be rejected */ 1690 p = (void*) (h+1); 1691 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 1692 if (debug) 1693 addlog(" %s ", sppp_lcp_opt_name(*p)); 1694 switch (*p) { 1695 case LCP_OPT_MAGIC: 1696 /* Magic number. */ 1697 /* fall through, both are same length */ 1698 case LCP_OPT_ASYNC_MAP: 1699 /* Async control character map. */ 1700 if (len >= 6 || p[1] == 6) 1701 continue; 1702 if (debug) 1703 addlog("[invalid] "); 1704 break; 1705 case LCP_OPT_MRU: 1706 /* Maximum receive unit. */ 1707 if (len >= 4 && p[1] == 4) 1708 continue; 1709 if (debug) 1710 addlog("[invalid] "); 1711 break; 1712 default: 1713 /* Others not supported. */ 1714 if (debug) 1715 addlog("[rej] "); 1716 break; 1717 } 1718 /* Add the option to rejected list. */ 1719 bcopy (p, r, p[1]); 1720 r += p[1]; 1721 rlen += p[1]; 1722 } 1723 if (rlen) { 1724 if (debug) 1725 addlog(" send conf-rej\n"); 1726 sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 1727 return 0; 1728 } else if (debug) 1729 addlog("\n"); 1730 1731 /* 1732 * pass 2: check for option values that are unacceptable and 1733 * thus require to be nak'ed. 1734 */ 1735 if (debug) 1736 log(LOG_DEBUG, "%s%d: lcp parse opt values: ", 1737 ifp->if_name, ifp->if_unit); 1738 1739 p = (void*) (h+1); 1740 len = origlen; 1741 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 1742 if (debug) 1743 addlog(" %s ", sppp_lcp_opt_name(*p)); 1744 switch (*p) { 1745 case LCP_OPT_MAGIC: 1746 /* Magic number -- extract. */ 1747 nmagic = (u_long)p[2] << 24 | 1748 (u_long)p[3] << 16 | p[4] << 8 | p[5]; 1749 if (nmagic != sp->lcp.magic) { 1750 if (debug) 1751 addlog("0x%x ", nmagic); 1752 continue; 1753 } 1754 /* 1755 * Local and remote magics equal -- loopback? 1756 */ 1757 if (sp->pp_loopcnt >= MAXALIVECNT*5) { 1758 printf ("\n%s%d: loopback\n", 1759 ifp->if_name, ifp->if_unit); 1760 sp->pp_loopcnt = 0; 1761 if (ifp->if_flags & IFF_UP) { 1762 if_down(ifp); 1763 sppp_qflush(&sp->pp_cpq); 1764 /* XXX ? */ 1765 lcp.Down(sp); 1766 lcp.Up(sp); 1767 } 1768 } else if (debug) 1769 addlog("[glitch] "); 1770 ++sp->pp_loopcnt; 1771 /* 1772 * We negate our magic here, and NAK it. If 1773 * we see it later in an NAK packet, we 1774 * suggest a new one. 1775 */ 1776 nmagic = ~sp->lcp.magic; 1777 /* Gonna NAK it. */ 1778 p[2] = nmagic >> 24; 1779 p[3] = nmagic >> 16; 1780 p[4] = nmagic >> 8; 1781 p[5] = nmagic; 1782 break; 1783 1784 case LCP_OPT_ASYNC_MAP: 1785 /* Async control character map -- check to be zero. */ 1786 if (! p[2] && ! p[3] && ! p[4] && ! p[5]) { 1787 if (debug) 1788 addlog("[empty] "); 1789 continue; 1790 } 1791 if (debug) 1792 addlog("[non-empty] "); 1793 /* suggest a zero one */ 1794 p[2] = p[3] = p[4] = p[5] = 0; 1795 break; 1796 1797 case LCP_OPT_MRU: 1798 /* 1799 * Maximum receive unit. Always agreeable, 1800 * but ignored by now. 1801 */ 1802 sp->lcp.their_mru = p[2] * 256 + p[3]; 1803 if (debug) 1804 addlog("%d ", sp->lcp.their_mru); 1805 continue; 1806 } 1807 /* Add the option to nak'ed list. */ 1808 bcopy (p, r, p[1]); 1809 r += p[1]; 1810 rlen += p[1]; 1811 } 1812 if (rlen) { 1813 if (debug) 1814 addlog(" send conf-nak\n"); 1815 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 1816 return 0; 1817 } else { 1818 if (debug) 1819 addlog(" send conf-ack\n"); 1820 sp->pp_loopcnt = 0; 1821 sppp_cp_send (sp, PPP_LCP, CONF_ACK, 1822 h->ident, origlen, h+1); 1823 } 1824 1825 free (buf, M_TEMP); 1826 return (rlen == 0); 1827} 1828 1829/* 1830 * Analyze the LCP Configure-Reject option list, and adjust our 1831 * negotiation. 1832 */ 1833static void 1834sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 1835{ 1836 STDDCL; 1837 u_char *buf, *p; 1838 1839 len -= 4; 1840 buf = malloc (len, M_TEMP, M_NOWAIT); 1841 if (!buf) 1842 return; 1843 1844 if (debug) 1845 log(LOG_DEBUG, "%s%d: lcp rej opts: ", 1846 ifp->if_name, ifp->if_unit); 1847 1848 p = (void*) (h+1); 1849 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 1850 if (debug) 1851 addlog(" %s ", sppp_lcp_opt_name(*p)); 1852 switch (*p) { 1853 case LCP_OPT_MAGIC: 1854 /* Magic number -- can't use it, use 0 */ 1855 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 1856 sp->lcp.magic = 0; 1857 break; 1858 case LCP_OPT_MRU: 1859 /* 1860 * Should not be rejected anyway, since we only 1861 * negotiate a MRU if explicitly requested by 1862 * peer. 1863 */ 1864 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 1865 break; 1866 } 1867 } 1868 if (debug) 1869 addlog("\n"); 1870 free (buf, M_TEMP); 1871 return; 1872} 1873 1874/* 1875 * Analyze the LCP Configure-NAK option list, and adjust our 1876 * negotiation. 1877 */ 1878static void 1879sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 1880{ 1881 STDDCL; 1882 u_char *buf, *p; 1883 u_long magic; 1884 1885 len -= 4; 1886 buf = malloc (len, M_TEMP, M_NOWAIT); 1887 if (!buf) 1888 return; 1889 1890 if (debug) 1891 log(LOG_DEBUG, "%s%d: lcp nak opts: ", 1892 ifp->if_name, ifp->if_unit); 1893 1894 p = (void*) (h+1); 1895 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 1896 if (debug) 1897 addlog(" %s ", sppp_lcp_opt_name(*p)); 1898 switch (*p) { 1899 case LCP_OPT_MAGIC: 1900 /* Magic number -- renegotiate */ 1901 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 1902 len >= 6 && p[1] == 6) { 1903 magic = (u_long)p[2] << 24 | 1904 (u_long)p[3] << 16 | p[4] << 8 | p[5]; 1905 /* 1906 * If the remote magic is our negated one, 1907 * this looks like a loopback problem. 1908 * Suggest a new magic to make sure. 1909 */ 1910 if (magic == ~sp->lcp.magic) { 1911 if (debug) 1912 addlog("magic glitch "); 1913 sp->lcp.magic += time.tv_sec + time.tv_usec; 1914 } else { 1915 sp->lcp.magic = magic; 1916 if (debug) 1917 addlog("%d "); 1918 } 1919 } 1920 break; 1921 case LCP_OPT_MRU: 1922 /* 1923 * Peer wants to advise us to negotiate an MRU. 1924 * Agree on it if it's reasonable, or use 1925 * default otherwise. 1926 */ 1927 if (len >= 4 && p[1] == 4) { 1928 u_int mru = p[2] * 256 + p[3]; 1929 if (debug) 1930 addlog("%d ", mru); 1931 if (mru < PP_MTU || mru > PP_MAX_MRU) 1932 mru = PP_MTU; 1933 sp->lcp.mru = mru; 1934 sp->lcp.opts |= (1 << LCP_OPT_MRU); 1935 } 1936 break; 1937 } 1938 } 1939 if (debug) 1940 addlog("\n"); 1941 free (buf, M_TEMP); 1942 return; 1943} 1944 1945static void 1946sppp_lcp_tlu(struct sppp *sp) 1947{ 1948 STDDCL; 1949 int i; 1950 u_long mask; 1951 1952 /* XXX ? */ 1953 if (! (ifp->if_flags & IFF_UP) && 1954 (ifp->if_flags & IFF_RUNNING)) { 1955 /* Coming out of loopback mode. */ 1956 if_up(ifp); 1957 printf ("%s%d: up\n", ifp->if_name, ifp->if_unit); 1958 } 1959 1960 for (i = 0; i < IDX_COUNT; i++) 1961 if ((cps[i])->flags & CP_QUAL) 1962 (cps[i])->Open(sp); 1963 1964 if (/* require authentication XXX */ 0) 1965 sp->pp_phase = PHASE_AUTHENTICATE; 1966 else 1967 sp->pp_phase = PHASE_NETWORK; 1968 1969 log(LOG_INFO, "%s%d: phase %s\n", ifp->if_name, ifp->if_unit, 1970 sppp_phase_name(sp->pp_phase)); 1971 1972 if (sp->pp_phase == PHASE_AUTHENTICATE) { 1973 for (i = 0; i < IDX_COUNT; i++) 1974 if ((cps[i])->flags & CP_AUTH) 1975 (cps[i])->Open(sp); 1976 } else { 1977 /* Notify all NCPs. */ 1978 for (i = 0; i < IDX_COUNT; i++) 1979 if ((cps[i])->flags & CP_NCP) 1980 (cps[i])->Open(sp); 1981 } 1982 1983 /* Send Up events to all started protos. */ 1984 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 1985 if (sp->lcp.protos & mask && ((cps[i])->flags & CP_LCP) == 0) 1986 (cps[i])->Up(sp); 1987 1988 if (sp->pp_phase == PHASE_NETWORK) 1989 /* if no NCP is starting, close down */ 1990 sppp_lcp_check(sp); 1991} 1992 1993static void 1994sppp_lcp_tld(struct sppp *sp) 1995{ 1996 STDDCL; 1997 int i; 1998 u_long mask; 1999 2000 sp->pp_phase = PHASE_TERMINATE; 2001 2002 log(LOG_INFO, "%s%d: phase %s\n", ifp->if_name, ifp->if_unit, 2003 sppp_phase_name(sp->pp_phase)); 2004 2005 /* 2006 * Take upper layers down. We send the Down event first and 2007 * the Close second to prevent the upper layers from sending 2008 * ``a flurry of terminate-request packets'', as the RFC 2009 * describes it. 2010 */ 2011 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2012 if (sp->lcp.protos & mask && ((cps[i])->flags & CP_LCP) == 0) { 2013 (cps[i])->Down(sp); 2014 (cps[i])->Close(sp); 2015 } 2016} 2017 2018static void 2019sppp_lcp_tls(struct sppp *sp) 2020{ 2021 STDDCL; 2022 2023 sp->pp_phase = PHASE_ESTABLISH; 2024 2025 log(LOG_INFO, "%s%d: phase %s\n", ifp->if_name, ifp->if_unit, 2026 sppp_phase_name(sp->pp_phase)); 2027 2028 /* Notify lower layer if desired. */ 2029 if (sp->pp_tls) 2030 (sp->pp_tls)(sp); 2031} 2032 2033static void 2034sppp_lcp_tlf(struct sppp *sp) 2035{ 2036 STDDCL; 2037 2038 sp->pp_phase = PHASE_DEAD; 2039 log(LOG_INFO, "%s%d: phase %s\n", ifp->if_name, ifp->if_unit, 2040 sppp_phase_name(sp->pp_phase)); 2041 2042 /* Notify lower layer if desired. */ 2043 if (sp->pp_tlf) 2044 (sp->pp_tlf)(sp); 2045} 2046 2047static void 2048sppp_lcp_scr(struct sppp *sp) 2049{ 2050 char opt[6 /* magicnum */ + 4 /* mru */]; 2051 int i = 0; 2052 2053 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2054 if (! sp->lcp.magic) 2055 sp->lcp.magic = time.tv_sec + time.tv_usec; 2056 opt[i++] = LCP_OPT_MAGIC; 2057 opt[i++] = 6; 2058 opt[i++] = sp->lcp.magic >> 24; 2059 opt[i++] = sp->lcp.magic >> 16; 2060 opt[i++] = sp->lcp.magic >> 8; 2061 opt[i++] = sp->lcp.magic; 2062 } 2063 2064 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2065 opt[i++] = LCP_OPT_MRU; 2066 opt[i++] = 4; 2067 opt[i++] = sp->lcp.mru >> 8; 2068 opt[i++] = sp->lcp.mru; 2069 } 2070 2071 sp->confid[IDX_LCP] = ++sp->pp_seq; 2072 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2073} 2074 2075/* 2076 * Re-check the open NCPs and see if we should terminate the link. 2077 * Called by the NCPs during their tlf action handling. 2078 */ 2079static void 2080sppp_lcp_check(struct sppp *sp) 2081{ 2082 int i, mask; 2083 2084 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2085 if (sp->lcp.protos & mask && (cps[i])->flags & CP_NCP) 2086 return; 2087 lcp.Close(sp); 2088} 2089/* 2090 *--------------------------------------------------------------------------* 2091 * * 2092 * The IPCP implementation. * 2093 * * 2094 *--------------------------------------------------------------------------* 2095 */ 2096 2097static void 2098sppp_ipcp_init(struct sppp *sp) 2099{ 2100 sp->ipcp.opts = 0; 2101 sp->ipcp.flags = 0; 2102 sp->state[IDX_IPCP] = STATE_INITIAL; 2103 sp->fail_counter[IDX_IPCP] = 0; 2104} 2105 2106static void 2107sppp_ipcp_up(struct sppp *sp) 2108{ 2109 sppp_up_event(&ipcp, sp); 2110} 2111 2112static void 2113sppp_ipcp_down(struct sppp *sp) 2114{ 2115 sppp_down_event(&ipcp, sp); 2116} 2117 2118static void 2119sppp_ipcp_open(struct sppp *sp) 2120{ 2121 STDDCL; 2122 u_long myaddr, hisaddr; 2123 2124 sppp_get_ip_addrs(sp, &myaddr, &hisaddr); 2125 /* 2126 * If we don't have his address, this probably means our 2127 * interface doesn't want to talk IP at all. (This could 2128 * be the case if somebody wants to speak only IPX, for 2129 * example.) Don't open IPCP in this case. 2130 */ 2131 if (hisaddr == 0L) { 2132 /* XXX this message should go away */ 2133 if (debug) 2134 log(LOG_DEBUG, "%s%d: ipcp_open(): no IP interface\n", 2135 ifp->if_name, ifp->if_unit); 2136 return; 2137 } 2138 2139 if (myaddr == 0L) { 2140 /* 2141 * I don't have an assigned address, so i need to 2142 * negotiate my address. 2143 */ 2144 sp->ipcp.flags |= IPCP_MYADDR_DYN; 2145 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2146 } 2147 sppp_open_event(&ipcp, sp); 2148} 2149 2150static void 2151sppp_ipcp_close(struct sppp *sp) 2152{ 2153 sppp_close_event(&ipcp, sp); 2154 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 2155 /* 2156 * My address was dynamic, clear it again. 2157 */ 2158 sppp_set_ip_addr(sp, 0L); 2159} 2160 2161static void 2162sppp_ipcp_TO(void *cookie) 2163{ 2164 sppp_to_event(&ipcp, (struct sppp *)cookie); 2165} 2166 2167/* 2168 * Analyze a configure request. Return true if it was agreeable, and 2169 * caused action sca, false if it has been rejected or nak'ed, and 2170 * caused action scn. (The return value is used to make the state 2171 * transition decision in the state automaton.) 2172 */ 2173static int 2174sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2175{ 2176 u_char *buf, *r, *p; 2177 struct ifnet *ifp = &sp->pp_if; 2178 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 2179 u_long hisaddr, desiredaddr; 2180 2181 len -= 4; 2182 origlen = len; 2183 /* 2184 * Make sure to allocate a buf that can at least hold a 2185 * conf-nak with an `address' option. We might need it below. 2186 */ 2187 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 2188 if (! buf) 2189 return (0); 2190 2191 /* pass 1: see if we can recognize them */ 2192 if (debug) 2193 log(LOG_DEBUG, "%s%d: ipcp parse opts: ", 2194 ifp->if_name, ifp->if_unit); 2195 p = (void*) (h+1); 2196 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2197 if (debug) 2198 addlog(" %s ", sppp_ipcp_opt_name(*p)); 2199 switch (*p) { 2200#ifdef notyet 2201 case IPCP_OPT_COMPRESSION: 2202 if (len >= 6 && p[1] >= 6) { 2203 /* correctly formed compress option */ 2204 continue; 2205 } 2206 if (debug) 2207 addlog("[invalid] "); 2208 break; 2209#endif 2210 case IPCP_OPT_ADDRESS: 2211 if (len >= 6 && p[1] == 6) { 2212 /* correctly formed address option */ 2213 continue; 2214 } 2215 if (debug) 2216 addlog("[invalid] "); 2217 break; 2218 default: 2219 /* Others not supported. */ 2220 if (debug) 2221 addlog("[rej] "); 2222 break; 2223 } 2224 /* Add the option to rejected list. */ 2225 bcopy (p, r, p[1]); 2226 r += p[1]; 2227 rlen += p[1]; 2228 } 2229 if (rlen) { 2230 if (debug) 2231 addlog(" send conf-rej\n"); 2232 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 2233 return 0; 2234 } else if (debug) 2235 addlog("\n"); 2236 2237 /* pass 2: parse option values */ 2238 sppp_get_ip_addrs(sp, 0, &hisaddr); 2239 if (debug) 2240 addlog("%s%d: ipcp parse opt values: ", ifp->if_name, ifp->if_unit); 2241 p = (void*) (h+1); 2242 len = origlen; 2243 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2244 if (debug) 2245 addlog(" %s ", sppp_ipcp_opt_name(*p)); 2246 switch (*p) { 2247#ifdef notyet 2248 case IPCP_OPT_COMPRESSION: 2249 continue; 2250#endif 2251 case IPCP_OPT_ADDRESS: 2252 desiredaddr = p[2] << 24 | p[3] << 16 | 2253 p[4] << 8 | p[5]; 2254 if (desiredaddr == hisaddr) { 2255 /* 2256 * Peer's address is same as our value, 2257 * this is agreeable. Gonna conf-ack 2258 * it. 2259 */ 2260 if (debug) 2261 addlog("0x%x [ack] ", hisaddr); 2262 /* record that we've seen it already */ 2263 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 2264 continue; 2265 } 2266 /* 2267 * The address wasn't agreeable. This is either 2268 * he sent us 0.0.0.0, asking to assign him an 2269 * address, or he send us another address not 2270 * matching our value. Either case, we gonna 2271 * conf-nak it with our value. 2272 */ 2273 if (debug) { 2274 if (desiredaddr == 0) 2275 addlog("[addr requested] "); 2276 else 2277 addlog("0x%x [not agreed] ", 2278 desiredaddr); 2279 2280 p[2] = hisaddr >> 24; 2281 p[3] = hisaddr >> 16; 2282 p[4] = hisaddr >> 8; 2283 p[5] = hisaddr; 2284 } 2285 break; 2286 } 2287 /* Add the option to nak'ed list. */ 2288 bcopy (p, r, p[1]); 2289 r += p[1]; 2290 rlen += p[1]; 2291 } 2292 2293 /* 2294 * If we are about to conf-ack the request, but haven't seen 2295 * his address so far, gonna conf-nak it instead, with the 2296 * `address' option present and our idea of his address being 2297 * filled in there, to request negotiation of both addresses. 2298 * 2299 * XXX This can result in an endless req - nak loop if peer 2300 * doesn't want to send us his address. Q: What should we do 2301 * about it? XXX A: implement the max-failure counter. 2302 */ 2303 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 2304 buf[0] = IPCP_OPT_ADDRESS; 2305 buf[1] = 6; 2306 buf[2] = hisaddr >> 24; 2307 buf[3] = hisaddr >> 16; 2308 buf[4] = hisaddr >> 8; 2309 buf[5] = hisaddr; 2310 rlen = 6; 2311 if (debug) 2312 addlog("still need hisaddr "); 2313 } 2314 2315 if (rlen) { 2316 if (debug) 2317 addlog(" send conf-nak\n"); 2318 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 2319 } else { 2320 if (debug) 2321 addlog(" send conf-ack\n"); 2322 sppp_cp_send (sp, PPP_IPCP, CONF_ACK, 2323 h->ident, origlen, h+1); 2324 } 2325 2326 free (buf, M_TEMP); 2327 return (rlen == 0); 2328} 2329 2330/* 2331 * Analyze the IPCP Configure-Reject option list, and adjust our 2332 * negotiation. 2333 */ 2334static void 2335sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2336{ 2337 u_char *buf, *p; 2338 struct ifnet *ifp = &sp->pp_if; 2339 int debug = ifp->if_flags & IFF_DEBUG; 2340 2341 len -= 4; 2342 buf = malloc (len, M_TEMP, M_NOWAIT); 2343 if (!buf) 2344 return; 2345 2346 if (debug) 2347 log(LOG_DEBUG, "%s%d: ipcp rej opts: ", 2348 ifp->if_name, ifp->if_unit); 2349 2350 p = (void*) (h+1); 2351 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2352 if (debug) 2353 addlog(" %s ", sppp_ipcp_opt_name(*p)); 2354 switch (*p) { 2355 case IPCP_OPT_ADDRESS: 2356 /* 2357 * Peer doesn't grok address option. This is 2358 * bad. XXX Should we better give up here? 2359 */ 2360 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 2361 break; 2362#ifdef notyet 2363 case IPCP_OPT_COMPRESS: 2364 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 2365 break; 2366#endif 2367 } 2368 } 2369 if (debug) 2370 addlog("\n"); 2371 free (buf, M_TEMP); 2372 return; 2373} 2374 2375/* 2376 * Analyze the IPCP Configure-NAK option list, and adjust our 2377 * negotiation. 2378 */ 2379static void 2380sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2381{ 2382 u_char *buf, *p; 2383 struct ifnet *ifp = &sp->pp_if; 2384 int debug = ifp->if_flags & IFF_DEBUG; 2385 u_long wantaddr; 2386 2387 len -= 4; 2388 buf = malloc (len, M_TEMP, M_NOWAIT); 2389 if (!buf) 2390 return; 2391 2392 if (debug) 2393 log(LOG_DEBUG, "%s%d: ipcp nak opts: ", 2394 ifp->if_name, ifp->if_unit); 2395 2396 p = (void*) (h+1); 2397 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2398 if (debug) 2399 addlog(" %s ", sppp_ipcp_opt_name(*p)); 2400 switch (*p) { 2401 case IPCP_OPT_ADDRESS: 2402 /* 2403 * Peer doesn't like our local IP address. See 2404 * if we can do something for him. We'll drop 2405 * him our address then. 2406 */ 2407 if (len >= 6 && p[1] == 6) { 2408 wantaddr = p[2] << 24 | p[3] << 16 | 2409 p[4] << 8 | p[5]; 2410 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2411 if (debug) 2412 addlog("[wantaddr 0x%x] ", wantaddr); 2413 /* 2414 * When doing dynamic address assignment, 2415 * we accept his offer. Otherwise, we 2416 * ignore it and thus continue to negotiate 2417 * our already existing value. 2418 */ 2419 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 2420 sppp_set_ip_addr(sp, wantaddr); 2421 if (debug) 2422 addlog("[agree] "); 2423 } 2424 } 2425 break; 2426#ifdef notyet 2427 case IPCP_OPT_COMPRESS: 2428 /* 2429 * Peer wants different compression parameters. 2430 */ 2431 break; 2432#endif 2433 } 2434 } 2435 if (debug) 2436 addlog("\n"); 2437 free (buf, M_TEMP); 2438 return; 2439} 2440 2441static void 2442sppp_ipcp_tlu(struct sppp *sp) 2443{ 2444} 2445 2446static void 2447sppp_ipcp_tld(struct sppp *sp) 2448{ 2449} 2450 2451static void 2452sppp_ipcp_tls(struct sppp *sp) 2453{ 2454 /* indicate to LCP that it must stay alive */ 2455 sp->lcp.protos |= (1 << IDX_IPCP); 2456} 2457 2458static void 2459sppp_ipcp_tlf(struct sppp *sp) 2460{ 2461 /* we no longer need LCP */ 2462 sp->lcp.protos &= ~(1 << IDX_IPCP); 2463 sppp_lcp_check(sp); 2464} 2465 2466static void 2467sppp_ipcp_scr(struct sppp *sp) 2468{ 2469 char opt[6 /* compression */ + 6 /* address */]; 2470 u_long ouraddr; 2471 int i = 0; 2472 2473#ifdef notyet 2474 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 2475 opt[i++] = IPCP_OPT_COMPRESSION; 2476 opt[i++] = 6; 2477 opt[i++] = 0; /* VJ header compression */ 2478 opt[i++] = 0x2d; /* VJ header compression */ 2479 opt[i++] = max_slot_id; 2480 opt[i++] = comp_slot_id; 2481 } 2482#endif 2483 2484 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 2485 sppp_get_ip_addrs(sp, &ouraddr, 0); 2486 opt[i++] = IPCP_OPT_ADDRESS; 2487 opt[i++] = 6; 2488 opt[i++] = ouraddr >> 24; 2489 opt[i++] = ouraddr >> 16; 2490 opt[i++] = ouraddr >> 8; 2491 opt[i++] = ouraddr; 2492 } 2493 2494 sp->confid[IDX_IPCP] = ++sp->pp_seq; 2495 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 2496} 2497 2498 2499/* 2500 * Random miscellaneous functions. 2501 */ 2502 2503/* 2504 * Flush interface queue. 2505 */ 2506static void 2507sppp_qflush(struct ifqueue *ifq) 2508{ 2509 struct mbuf *m, *n; 2510 2511 n = ifq->ifq_head; 2512 while ((m = n)) { 2513 n = m->m_act; 2514 m_freem (m); 2515 } 2516 ifq->ifq_head = 0; 2517 ifq->ifq_tail = 0; 2518 ifq->ifq_len = 0; 2519} 2520 2521/* 2522 * Send keepalive packets, every 10 seconds. 2523 */ 2524static void 2525sppp_keepalive(void *dummy) 2526{ 2527 struct sppp *sp; 2528 int s; 2529 2530 s = splimp(); 2531 for (sp=spppq; sp; sp=sp->pp_next) { 2532 struct ifnet *ifp = &sp->pp_if; 2533 2534 /* Keepalive mode disabled or channel down? */ 2535 if (! (sp->pp_flags & PP_KEEPALIVE) || 2536 ! (ifp->if_flags & IFF_RUNNING)) 2537 continue; 2538 2539 /* No keepalive in PPP mode if LCP not opened yet. */ 2540 if (! (sp->pp_flags & PP_CISCO) && 2541 sp->pp_phase < PHASE_AUTHENTICATE) 2542 continue; 2543 2544 if (sp->pp_alivecnt == MAXALIVECNT) { 2545 /* No keepalive packets got. Stop the interface. */ 2546 printf ("%s%d: down\n", ifp->if_name, ifp->if_unit); 2547 if_down (ifp); 2548 sppp_qflush (&sp->pp_cpq); 2549 if (! (sp->pp_flags & PP_CISCO)) { 2550 /* XXX */ 2551 /* Shut down the PPP link. */ 2552 lcp.Down(sp); 2553 /* Initiate negotiation. XXX */ 2554 lcp.Up(sp); 2555 } 2556 } 2557 if (sp->pp_alivecnt <= MAXALIVECNT) 2558 ++sp->pp_alivecnt; 2559 if (sp->pp_flags & PP_CISCO) 2560 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ, ++sp->pp_seq, 2561 sp->pp_rseq); 2562 else if (sp->pp_phase >= PHASE_AUTHENTICATE) { 2563 long nmagic = htonl (sp->lcp.magic); 2564 sp->lcp.echoid = ++sp->pp_seq; 2565 sppp_cp_send (sp, PPP_LCP, ECHO_REQ, 2566 sp->lcp.echoid, 4, &nmagic); 2567 } 2568 } 2569 splx(s); 2570 timeout(sppp_keepalive, 0, hz * 10); 2571} 2572 2573/* 2574 * Get both IP addresses. 2575 */ 2576static void 2577sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst) 2578{ 2579 struct ifnet *ifp = &sp->pp_if; 2580 struct ifaddr *ifa; 2581 struct sockaddr_in *si; 2582 u_long ssrc, ddst; 2583 2584 ssrc = ddst = 0L; 2585 /* 2586 * Pick the first AF_INET address from the list, 2587 * aliases don't make any sense on a p2p link anyway. 2588 */ 2589 for (ifa = ifp->if_addrhead.tqh_first, si = 0; 2590 ifa; 2591 ifa = ifa->ifa_link.tqe_next) 2592 if (ifa->ifa_addr->sa_family == AF_INET) { 2593 si = (struct sockaddr_in *)ifa->ifa_addr; 2594 if (si) 2595 break; 2596 } 2597 if (ifa) { 2598 if (si && si->sin_addr.s_addr) 2599 ssrc = si->sin_addr.s_addr; 2600 2601 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 2602 if (si && si->sin_addr.s_addr) 2603 ddst = si->sin_addr.s_addr; 2604 } 2605 2606 if (dst) *dst = ntohl(ddst); 2607 if (src) *src = ntohl(ssrc); 2608} 2609 2610/* 2611 * Set my IP address. Must be called at splimp. 2612 */ 2613static void 2614sppp_set_ip_addr(struct sppp *sp, u_long src) 2615{ 2616 struct ifnet *ifp = &sp->pp_if; 2617 struct ifaddr *ifa; 2618 struct sockaddr_in *si; 2619 u_long ssrc, ddst; 2620 2621 /* 2622 * Pick the first AF_INET address from the list, 2623 * aliases don't make any sense on a p2p link anyway. 2624 */ 2625 for (ifa = ifp->if_addrhead.tqh_first, si = 0; 2626 ifa; 2627 ifa = ifa->ifa_link.tqe_next) 2628 if (ifa->ifa_addr->sa_family == AF_INET) { 2629 si = (struct sockaddr_in *)ifa->ifa_addr; 2630 if (si) 2631 break; 2632 } 2633 if (ifa && si) 2634 si->sin_addr.s_addr = htonl(src); 2635} 2636 2637static const char * 2638sppp_cp_type_name(u_char type) 2639{ 2640 static char buf [12]; 2641 switch (type) { 2642 case CONF_REQ: return ("conf-req"); 2643 case CONF_ACK: return ("conf-ack"); 2644 case CONF_NAK: return ("conf-nak"); 2645 case CONF_REJ: return ("conf-rej"); 2646 case TERM_REQ: return ("term-req"); 2647 case TERM_ACK: return ("term-ack"); 2648 case CODE_REJ: return ("code-rej"); 2649 case PROTO_REJ: return ("proto-rej"); 2650 case ECHO_REQ: return ("echo-req"); 2651 case ECHO_REPLY: return ("echo-reply"); 2652 case DISC_REQ: return ("discard-req"); 2653 } 2654 sprintf (buf, "0x%x", type); 2655 return (buf); 2656} 2657 2658static const char * 2659sppp_lcp_opt_name(u_char opt) 2660{ 2661 static char buf [12]; 2662 switch (opt) { 2663 case LCP_OPT_MRU: return ("mru"); 2664 case LCP_OPT_ASYNC_MAP: return ("async-map"); 2665 case LCP_OPT_AUTH_PROTO: return ("auth-proto"); 2666 case LCP_OPT_QUAL_PROTO: return ("qual-proto"); 2667 case LCP_OPT_MAGIC: return ("magic"); 2668 case LCP_OPT_PROTO_COMP: return ("proto-comp"); 2669 case LCP_OPT_ADDR_COMP: return ("addr-comp"); 2670 } 2671 sprintf (buf, "0x%x", opt); 2672 return (buf); 2673} 2674 2675static const char * 2676sppp_ipcp_opt_name(u_char opt) 2677{ 2678 static char buf [12]; 2679 switch (opt) { 2680 case IPCP_OPT_ADDRESSES: return ("addresses"); 2681 case IPCP_OPT_COMPRESSION: return ("compression"); 2682 case IPCP_OPT_ADDRESS: return ("address"); 2683 } 2684 sprintf (buf, "0x%x", opt); 2685 return (buf); 2686} 2687 2688static const char * 2689sppp_state_name(int state) 2690{ 2691 switch (state) { 2692 case STATE_INITIAL: return "initial"; 2693 case STATE_STARTING: return "starting"; 2694 case STATE_CLOSED: return "closed"; 2695 case STATE_STOPPED: return "stopped"; 2696 case STATE_CLOSING: return "closing"; 2697 case STATE_STOPPING: return "stopping"; 2698 case STATE_REQ_SENT: return "req-sent"; 2699 case STATE_ACK_RCVD: return "ack-rcvd"; 2700 case STATE_ACK_SENT: return "ack-sent"; 2701 case STATE_OPENED: return "opened"; 2702 } 2703 return "illegal"; 2704} 2705 2706static const char * 2707sppp_phase_name(enum ppp_phase phase) 2708{ 2709 switch (phase) { 2710 case PHASE_DEAD: return "dead"; 2711 case PHASE_ESTABLISH: return "establish"; 2712 case PHASE_TERMINATE: return "terminate"; 2713 case PHASE_AUTHENTICATE: return "authenticate"; 2714 case PHASE_NETWORK: return "network"; 2715 } 2716 return "illegal"; 2717} 2718 2719static const char * 2720sppp_proto_name(u_short proto) 2721{ 2722 static char buf[12]; 2723 switch (proto) { 2724 case PPP_LCP: return "lcp"; 2725 case PPP_IPCP: return "ipcp"; 2726 } 2727 sprintf(buf, "0x%x", (unsigned)proto); 2728 return buf; 2729} 2730 2731static void 2732sppp_print_bytes(u_char *p, u_short len) 2733{ 2734 addlog(" %x", *p++); 2735 while (--len > 0) 2736 addlog("-%x", *p++); 2737} 2738 2739/* 2740 * This file is large. Tell emacs to highlight it nevertheless. 2741 * 2742 * Local Variables: 2743 * hilit-auto-highlight-maxout: 100000 2744 * End: 2745 */ 2746