if_spppsubr.c revision 28088
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 1.24 1997/08/10 14:28:16 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_UNICAST; /* unicast 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 (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 1814 if (debug) 1815 addlog(" max_failure (%d) exceeded, " 1816 "send conf-rej\n", 1817 sp->lcp.max_failure); 1818 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 1819 } else { 1820 if (debug) 1821 addlog(" send conf-nak\n"); 1822 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 1823 } 1824 return 0; 1825 } else { 1826 if (debug) 1827 addlog(" send conf-ack\n"); 1828 sp->fail_counter[IDX_LCP] = 0; 1829 sp->pp_loopcnt = 0; 1830 sppp_cp_send (sp, PPP_LCP, CONF_ACK, 1831 h->ident, origlen, h+1); 1832 } 1833 1834 free (buf, M_TEMP); 1835 return (rlen == 0); 1836} 1837 1838/* 1839 * Analyze the LCP Configure-Reject option list, and adjust our 1840 * negotiation. 1841 */ 1842static void 1843sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 1844{ 1845 STDDCL; 1846 u_char *buf, *p; 1847 1848 len -= 4; 1849 buf = malloc (len, M_TEMP, M_NOWAIT); 1850 if (!buf) 1851 return; 1852 1853 if (debug) 1854 log(LOG_DEBUG, "%s%d: lcp rej opts: ", 1855 ifp->if_name, ifp->if_unit); 1856 1857 p = (void*) (h+1); 1858 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 1859 if (debug) 1860 addlog(" %s ", sppp_lcp_opt_name(*p)); 1861 switch (*p) { 1862 case LCP_OPT_MAGIC: 1863 /* Magic number -- can't use it, use 0 */ 1864 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 1865 sp->lcp.magic = 0; 1866 break; 1867 case LCP_OPT_MRU: 1868 /* 1869 * Should not be rejected anyway, since we only 1870 * negotiate a MRU if explicitly requested by 1871 * peer. 1872 */ 1873 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 1874 break; 1875 } 1876 } 1877 if (debug) 1878 addlog("\n"); 1879 free (buf, M_TEMP); 1880 return; 1881} 1882 1883/* 1884 * Analyze the LCP Configure-NAK option list, and adjust our 1885 * negotiation. 1886 */ 1887static void 1888sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 1889{ 1890 STDDCL; 1891 u_char *buf, *p; 1892 u_long magic; 1893 1894 len -= 4; 1895 buf = malloc (len, M_TEMP, M_NOWAIT); 1896 if (!buf) 1897 return; 1898 1899 if (debug) 1900 log(LOG_DEBUG, "%s%d: lcp nak opts: ", 1901 ifp->if_name, ifp->if_unit); 1902 1903 p = (void*) (h+1); 1904 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 1905 if (debug) 1906 addlog(" %s ", sppp_lcp_opt_name(*p)); 1907 switch (*p) { 1908 case LCP_OPT_MAGIC: 1909 /* Magic number -- renegotiate */ 1910 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 1911 len >= 6 && p[1] == 6) { 1912 magic = (u_long)p[2] << 24 | 1913 (u_long)p[3] << 16 | p[4] << 8 | p[5]; 1914 /* 1915 * If the remote magic is our negated one, 1916 * this looks like a loopback problem. 1917 * Suggest a new magic to make sure. 1918 */ 1919 if (magic == ~sp->lcp.magic) { 1920 if (debug) 1921 addlog("magic glitch "); 1922 sp->lcp.magic += time.tv_sec + time.tv_usec; 1923 } else { 1924 sp->lcp.magic = magic; 1925 if (debug) 1926 addlog("%d "); 1927 } 1928 } 1929 break; 1930 case LCP_OPT_MRU: 1931 /* 1932 * Peer wants to advise us to negotiate an MRU. 1933 * Agree on it if it's reasonable, or use 1934 * default otherwise. 1935 */ 1936 if (len >= 4 && p[1] == 4) { 1937 u_int mru = p[2] * 256 + p[3]; 1938 if (debug) 1939 addlog("%d ", mru); 1940 if (mru < PP_MTU || mru > PP_MAX_MRU) 1941 mru = PP_MTU; 1942 sp->lcp.mru = mru; 1943 sp->lcp.opts |= (1 << LCP_OPT_MRU); 1944 } 1945 break; 1946 } 1947 } 1948 if (debug) 1949 addlog("\n"); 1950 free (buf, M_TEMP); 1951 return; 1952} 1953 1954static void 1955sppp_lcp_tlu(struct sppp *sp) 1956{ 1957 STDDCL; 1958 int i; 1959 u_long mask; 1960 1961 /* XXX ? */ 1962 if (! (ifp->if_flags & IFF_UP) && 1963 (ifp->if_flags & IFF_RUNNING)) { 1964 /* Coming out of loopback mode. */ 1965 if_up(ifp); 1966 printf ("%s%d: up\n", ifp->if_name, ifp->if_unit); 1967 } 1968 1969 for (i = 0; i < IDX_COUNT; i++) 1970 if ((cps[i])->flags & CP_QUAL) 1971 (cps[i])->Open(sp); 1972 1973 if (/* require authentication XXX */ 0) 1974 sp->pp_phase = PHASE_AUTHENTICATE; 1975 else 1976 sp->pp_phase = PHASE_NETWORK; 1977 1978 log(LOG_INFO, "%s%d: phase %s\n", ifp->if_name, ifp->if_unit, 1979 sppp_phase_name(sp->pp_phase)); 1980 1981 if (sp->pp_phase == PHASE_AUTHENTICATE) { 1982 for (i = 0; i < IDX_COUNT; i++) 1983 if ((cps[i])->flags & CP_AUTH) 1984 (cps[i])->Open(sp); 1985 } else { 1986 /* Notify all NCPs. */ 1987 for (i = 0; i < IDX_COUNT; i++) 1988 if ((cps[i])->flags & CP_NCP) 1989 (cps[i])->Open(sp); 1990 } 1991 1992 /* Send Up events to all started protos. */ 1993 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 1994 if (sp->lcp.protos & mask && ((cps[i])->flags & CP_LCP) == 0) 1995 (cps[i])->Up(sp); 1996 1997 if (sp->pp_phase == PHASE_NETWORK) 1998 /* if no NCP is starting, close down */ 1999 sppp_lcp_check(sp); 2000} 2001 2002static void 2003sppp_lcp_tld(struct sppp *sp) 2004{ 2005 STDDCL; 2006 int i; 2007 u_long mask; 2008 2009 sp->pp_phase = PHASE_TERMINATE; 2010 2011 log(LOG_INFO, "%s%d: phase %s\n", ifp->if_name, ifp->if_unit, 2012 sppp_phase_name(sp->pp_phase)); 2013 2014 /* 2015 * Take upper layers down. We send the Down event first and 2016 * the Close second to prevent the upper layers from sending 2017 * ``a flurry of terminate-request packets'', as the RFC 2018 * describes it. 2019 */ 2020 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2021 if (sp->lcp.protos & mask && ((cps[i])->flags & CP_LCP) == 0) { 2022 (cps[i])->Down(sp); 2023 (cps[i])->Close(sp); 2024 } 2025} 2026 2027static void 2028sppp_lcp_tls(struct sppp *sp) 2029{ 2030 STDDCL; 2031 2032 sp->pp_phase = PHASE_ESTABLISH; 2033 2034 log(LOG_INFO, "%s%d: phase %s\n", ifp->if_name, ifp->if_unit, 2035 sppp_phase_name(sp->pp_phase)); 2036 2037 /* Notify lower layer if desired. */ 2038 if (sp->pp_tls) 2039 (sp->pp_tls)(sp); 2040} 2041 2042static void 2043sppp_lcp_tlf(struct sppp *sp) 2044{ 2045 STDDCL; 2046 2047 sp->pp_phase = PHASE_DEAD; 2048 log(LOG_INFO, "%s%d: phase %s\n", ifp->if_name, ifp->if_unit, 2049 sppp_phase_name(sp->pp_phase)); 2050 2051 /* Notify lower layer if desired. */ 2052 if (sp->pp_tlf) 2053 (sp->pp_tlf)(sp); 2054} 2055 2056static void 2057sppp_lcp_scr(struct sppp *sp) 2058{ 2059 char opt[6 /* magicnum */ + 4 /* mru */]; 2060 int i = 0; 2061 2062 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2063 if (! sp->lcp.magic) 2064 sp->lcp.magic = time.tv_sec + time.tv_usec; 2065 opt[i++] = LCP_OPT_MAGIC; 2066 opt[i++] = 6; 2067 opt[i++] = sp->lcp.magic >> 24; 2068 opt[i++] = sp->lcp.magic >> 16; 2069 opt[i++] = sp->lcp.magic >> 8; 2070 opt[i++] = sp->lcp.magic; 2071 } 2072 2073 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2074 opt[i++] = LCP_OPT_MRU; 2075 opt[i++] = 4; 2076 opt[i++] = sp->lcp.mru >> 8; 2077 opt[i++] = sp->lcp.mru; 2078 } 2079 2080 sp->confid[IDX_LCP] = ++sp->pp_seq; 2081 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2082} 2083 2084/* 2085 * Re-check the open NCPs and see if we should terminate the link. 2086 * Called by the NCPs during their tlf action handling. 2087 */ 2088static void 2089sppp_lcp_check(struct sppp *sp) 2090{ 2091 int i, mask; 2092 2093 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2094 if (sp->lcp.protos & mask && (cps[i])->flags & CP_NCP) 2095 return; 2096 lcp.Close(sp); 2097} 2098/* 2099 *--------------------------------------------------------------------------* 2100 * * 2101 * The IPCP implementation. * 2102 * * 2103 *--------------------------------------------------------------------------* 2104 */ 2105 2106static void 2107sppp_ipcp_init(struct sppp *sp) 2108{ 2109 sp->ipcp.opts = 0; 2110 sp->ipcp.flags = 0; 2111 sp->state[IDX_IPCP] = STATE_INITIAL; 2112 sp->fail_counter[IDX_IPCP] = 0; 2113} 2114 2115static void 2116sppp_ipcp_up(struct sppp *sp) 2117{ 2118 sppp_up_event(&ipcp, sp); 2119} 2120 2121static void 2122sppp_ipcp_down(struct sppp *sp) 2123{ 2124 sppp_down_event(&ipcp, sp); 2125} 2126 2127static void 2128sppp_ipcp_open(struct sppp *sp) 2129{ 2130 STDDCL; 2131 u_long myaddr, hisaddr; 2132 2133 sppp_get_ip_addrs(sp, &myaddr, &hisaddr); 2134 /* 2135 * If we don't have his address, this probably means our 2136 * interface doesn't want to talk IP at all. (This could 2137 * be the case if somebody wants to speak only IPX, for 2138 * example.) Don't open IPCP in this case. 2139 */ 2140 if (hisaddr == 0L) { 2141 /* XXX this message should go away */ 2142 if (debug) 2143 log(LOG_DEBUG, "%s%d: ipcp_open(): no IP interface\n", 2144 ifp->if_name, ifp->if_unit); 2145 return; 2146 } 2147 2148 if (myaddr == 0L) { 2149 /* 2150 * I don't have an assigned address, so i need to 2151 * negotiate my address. 2152 */ 2153 sp->ipcp.flags |= IPCP_MYADDR_DYN; 2154 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2155 } 2156 sppp_open_event(&ipcp, sp); 2157} 2158 2159static void 2160sppp_ipcp_close(struct sppp *sp) 2161{ 2162 sppp_close_event(&ipcp, sp); 2163 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 2164 /* 2165 * My address was dynamic, clear it again. 2166 */ 2167 sppp_set_ip_addr(sp, 0L); 2168} 2169 2170static void 2171sppp_ipcp_TO(void *cookie) 2172{ 2173 sppp_to_event(&ipcp, (struct sppp *)cookie); 2174} 2175 2176/* 2177 * Analyze a configure request. Return true if it was agreeable, and 2178 * caused action sca, false if it has been rejected or nak'ed, and 2179 * caused action scn. (The return value is used to make the state 2180 * transition decision in the state automaton.) 2181 */ 2182static int 2183sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2184{ 2185 u_char *buf, *r, *p; 2186 struct ifnet *ifp = &sp->pp_if; 2187 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 2188 u_long hisaddr, desiredaddr; 2189 2190 len -= 4; 2191 origlen = len; 2192 /* 2193 * Make sure to allocate a buf that can at least hold a 2194 * conf-nak with an `address' option. We might need it below. 2195 */ 2196 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 2197 if (! buf) 2198 return (0); 2199 2200 /* pass 1: see if we can recognize them */ 2201 if (debug) 2202 log(LOG_DEBUG, "%s%d: ipcp parse opts: ", 2203 ifp->if_name, ifp->if_unit); 2204 p = (void*) (h+1); 2205 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2206 if (debug) 2207 addlog(" %s ", sppp_ipcp_opt_name(*p)); 2208 switch (*p) { 2209#ifdef notyet 2210 case IPCP_OPT_COMPRESSION: 2211 if (len >= 6 && p[1] >= 6) { 2212 /* correctly formed compress option */ 2213 continue; 2214 } 2215 if (debug) 2216 addlog("[invalid] "); 2217 break; 2218#endif 2219 case IPCP_OPT_ADDRESS: 2220 if (len >= 6 && p[1] == 6) { 2221 /* correctly formed address option */ 2222 continue; 2223 } 2224 if (debug) 2225 addlog("[invalid] "); 2226 break; 2227 default: 2228 /* Others not supported. */ 2229 if (debug) 2230 addlog("[rej] "); 2231 break; 2232 } 2233 /* Add the option to rejected list. */ 2234 bcopy (p, r, p[1]); 2235 r += p[1]; 2236 rlen += p[1]; 2237 } 2238 if (rlen) { 2239 if (debug) 2240 addlog(" send conf-rej\n"); 2241 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 2242 return 0; 2243 } else if (debug) 2244 addlog("\n"); 2245 2246 /* pass 2: parse option values */ 2247 sppp_get_ip_addrs(sp, 0, &hisaddr); 2248 if (debug) 2249 addlog("%s%d: ipcp parse opt values: ", ifp->if_name, ifp->if_unit); 2250 p = (void*) (h+1); 2251 len = origlen; 2252 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2253 if (debug) 2254 addlog(" %s ", sppp_ipcp_opt_name(*p)); 2255 switch (*p) { 2256#ifdef notyet 2257 case IPCP_OPT_COMPRESSION: 2258 continue; 2259#endif 2260 case IPCP_OPT_ADDRESS: 2261 desiredaddr = p[2] << 24 | p[3] << 16 | 2262 p[4] << 8 | p[5]; 2263 if (desiredaddr == hisaddr) { 2264 /* 2265 * Peer's address is same as our value, 2266 * this is agreeable. Gonna conf-ack 2267 * it. 2268 */ 2269 if (debug) 2270 addlog("0x%x [ack] ", hisaddr); 2271 /* record that we've seen it already */ 2272 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 2273 continue; 2274 } 2275 /* 2276 * The address wasn't agreeable. This is either 2277 * he sent us 0.0.0.0, asking to assign him an 2278 * address, or he send us another address not 2279 * matching our value. Either case, we gonna 2280 * conf-nak it with our value. 2281 */ 2282 if (debug) { 2283 if (desiredaddr == 0) 2284 addlog("[addr requested] "); 2285 else 2286 addlog("0x%x [not agreed] ", 2287 desiredaddr); 2288 2289 p[2] = hisaddr >> 24; 2290 p[3] = hisaddr >> 16; 2291 p[4] = hisaddr >> 8; 2292 p[5] = hisaddr; 2293 } 2294 break; 2295 } 2296 /* Add the option to nak'ed list. */ 2297 bcopy (p, r, p[1]); 2298 r += p[1]; 2299 rlen += p[1]; 2300 } 2301 2302 /* 2303 * If we are about to conf-ack the request, but haven't seen 2304 * his address so far, gonna conf-nak it instead, with the 2305 * `address' option present and our idea of his address being 2306 * filled in there, to request negotiation of both addresses. 2307 * 2308 * XXX This can result in an endless req - nak loop if peer 2309 * doesn't want to send us his address. Q: What should we do 2310 * about it? XXX A: implement the max-failure counter. 2311 */ 2312 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 2313 buf[0] = IPCP_OPT_ADDRESS; 2314 buf[1] = 6; 2315 buf[2] = hisaddr >> 24; 2316 buf[3] = hisaddr >> 16; 2317 buf[4] = hisaddr >> 8; 2318 buf[5] = hisaddr; 2319 rlen = 6; 2320 if (debug) 2321 addlog("still need hisaddr "); 2322 } 2323 2324 if (rlen) { 2325 if (debug) 2326 addlog(" send conf-nak\n"); 2327 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 2328 } else { 2329 if (debug) 2330 addlog(" send conf-ack\n"); 2331 sppp_cp_send (sp, PPP_IPCP, CONF_ACK, 2332 h->ident, origlen, h+1); 2333 } 2334 2335 free (buf, M_TEMP); 2336 return (rlen == 0); 2337} 2338 2339/* 2340 * Analyze the IPCP Configure-Reject option list, and adjust our 2341 * negotiation. 2342 */ 2343static void 2344sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2345{ 2346 u_char *buf, *p; 2347 struct ifnet *ifp = &sp->pp_if; 2348 int debug = ifp->if_flags & IFF_DEBUG; 2349 2350 len -= 4; 2351 buf = malloc (len, M_TEMP, M_NOWAIT); 2352 if (!buf) 2353 return; 2354 2355 if (debug) 2356 log(LOG_DEBUG, "%s%d: ipcp rej opts: ", 2357 ifp->if_name, ifp->if_unit); 2358 2359 p = (void*) (h+1); 2360 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2361 if (debug) 2362 addlog(" %s ", sppp_ipcp_opt_name(*p)); 2363 switch (*p) { 2364 case IPCP_OPT_ADDRESS: 2365 /* 2366 * Peer doesn't grok address option. This is 2367 * bad. XXX Should we better give up here? 2368 */ 2369 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 2370 break; 2371#ifdef notyet 2372 case IPCP_OPT_COMPRESS: 2373 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 2374 break; 2375#endif 2376 } 2377 } 2378 if (debug) 2379 addlog("\n"); 2380 free (buf, M_TEMP); 2381 return; 2382} 2383 2384/* 2385 * Analyze the IPCP Configure-NAK option list, and adjust our 2386 * negotiation. 2387 */ 2388static void 2389sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2390{ 2391 u_char *buf, *p; 2392 struct ifnet *ifp = &sp->pp_if; 2393 int debug = ifp->if_flags & IFF_DEBUG; 2394 u_long wantaddr; 2395 2396 len -= 4; 2397 buf = malloc (len, M_TEMP, M_NOWAIT); 2398 if (!buf) 2399 return; 2400 2401 if (debug) 2402 log(LOG_DEBUG, "%s%d: ipcp nak opts: ", 2403 ifp->if_name, ifp->if_unit); 2404 2405 p = (void*) (h+1); 2406 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2407 if (debug) 2408 addlog(" %s ", sppp_ipcp_opt_name(*p)); 2409 switch (*p) { 2410 case IPCP_OPT_ADDRESS: 2411 /* 2412 * Peer doesn't like our local IP address. See 2413 * if we can do something for him. We'll drop 2414 * him our address then. 2415 */ 2416 if (len >= 6 && p[1] == 6) { 2417 wantaddr = p[2] << 24 | p[3] << 16 | 2418 p[4] << 8 | p[5]; 2419 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2420 if (debug) 2421 addlog("[wantaddr 0x%x] ", wantaddr); 2422 /* 2423 * When doing dynamic address assignment, 2424 * we accept his offer. Otherwise, we 2425 * ignore it and thus continue to negotiate 2426 * our already existing value. 2427 */ 2428 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 2429 sppp_set_ip_addr(sp, wantaddr); 2430 if (debug) 2431 addlog("[agree] "); 2432 } 2433 } 2434 break; 2435#ifdef notyet 2436 case IPCP_OPT_COMPRESS: 2437 /* 2438 * Peer wants different compression parameters. 2439 */ 2440 break; 2441#endif 2442 } 2443 } 2444 if (debug) 2445 addlog("\n"); 2446 free (buf, M_TEMP); 2447 return; 2448} 2449 2450static void 2451sppp_ipcp_tlu(struct sppp *sp) 2452{ 2453} 2454 2455static void 2456sppp_ipcp_tld(struct sppp *sp) 2457{ 2458} 2459 2460static void 2461sppp_ipcp_tls(struct sppp *sp) 2462{ 2463 /* indicate to LCP that it must stay alive */ 2464 sp->lcp.protos |= (1 << IDX_IPCP); 2465} 2466 2467static void 2468sppp_ipcp_tlf(struct sppp *sp) 2469{ 2470 /* we no longer need LCP */ 2471 sp->lcp.protos &= ~(1 << IDX_IPCP); 2472 sppp_lcp_check(sp); 2473} 2474 2475static void 2476sppp_ipcp_scr(struct sppp *sp) 2477{ 2478 char opt[6 /* compression */ + 6 /* address */]; 2479 u_long ouraddr; 2480 int i = 0; 2481 2482#ifdef notyet 2483 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 2484 opt[i++] = IPCP_OPT_COMPRESSION; 2485 opt[i++] = 6; 2486 opt[i++] = 0; /* VJ header compression */ 2487 opt[i++] = 0x2d; /* VJ header compression */ 2488 opt[i++] = max_slot_id; 2489 opt[i++] = comp_slot_id; 2490 } 2491#endif 2492 2493 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 2494 sppp_get_ip_addrs(sp, &ouraddr, 0); 2495 opt[i++] = IPCP_OPT_ADDRESS; 2496 opt[i++] = 6; 2497 opt[i++] = ouraddr >> 24; 2498 opt[i++] = ouraddr >> 16; 2499 opt[i++] = ouraddr >> 8; 2500 opt[i++] = ouraddr; 2501 } 2502 2503 sp->confid[IDX_IPCP] = ++sp->pp_seq; 2504 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 2505} 2506 2507 2508/* 2509 * Random miscellaneous functions. 2510 */ 2511 2512/* 2513 * Flush interface queue. 2514 */ 2515static void 2516sppp_qflush(struct ifqueue *ifq) 2517{ 2518 struct mbuf *m, *n; 2519 2520 n = ifq->ifq_head; 2521 while ((m = n)) { 2522 n = m->m_act; 2523 m_freem (m); 2524 } 2525 ifq->ifq_head = 0; 2526 ifq->ifq_tail = 0; 2527 ifq->ifq_len = 0; 2528} 2529 2530/* 2531 * Send keepalive packets, every 10 seconds. 2532 */ 2533static void 2534sppp_keepalive(void *dummy) 2535{ 2536 struct sppp *sp; 2537 int s; 2538 2539 s = splimp(); 2540 for (sp=spppq; sp; sp=sp->pp_next) { 2541 struct ifnet *ifp = &sp->pp_if; 2542 2543 /* Keepalive mode disabled or channel down? */ 2544 if (! (sp->pp_flags & PP_KEEPALIVE) || 2545 ! (ifp->if_flags & IFF_RUNNING)) 2546 continue; 2547 2548 /* No keepalive in PPP mode if LCP not opened yet. */ 2549 if (! (sp->pp_flags & PP_CISCO) && 2550 sp->pp_phase < PHASE_AUTHENTICATE) 2551 continue; 2552 2553 if (sp->pp_alivecnt == MAXALIVECNT) { 2554 /* No keepalive packets got. Stop the interface. */ 2555 printf ("%s%d: down\n", ifp->if_name, ifp->if_unit); 2556 if_down (ifp); 2557 sppp_qflush (&sp->pp_cpq); 2558 if (! (sp->pp_flags & PP_CISCO)) { 2559 /* XXX */ 2560 /* Shut down the PPP link. */ 2561 lcp.Down(sp); 2562 /* Initiate negotiation. XXX */ 2563 lcp.Up(sp); 2564 } 2565 } 2566 if (sp->pp_alivecnt <= MAXALIVECNT) 2567 ++sp->pp_alivecnt; 2568 if (sp->pp_flags & PP_CISCO) 2569 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ, ++sp->pp_seq, 2570 sp->pp_rseq); 2571 else if (sp->pp_phase >= PHASE_AUTHENTICATE) { 2572 long nmagic = htonl (sp->lcp.magic); 2573 sp->lcp.echoid = ++sp->pp_seq; 2574 sppp_cp_send (sp, PPP_LCP, ECHO_REQ, 2575 sp->lcp.echoid, 4, &nmagic); 2576 } 2577 } 2578 splx(s); 2579 timeout(sppp_keepalive, 0, hz * 10); 2580} 2581 2582/* 2583 * Get both IP addresses. 2584 */ 2585static void 2586sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst) 2587{ 2588 struct ifnet *ifp = &sp->pp_if; 2589 struct ifaddr *ifa; 2590 struct sockaddr_in *si; 2591 u_long ssrc, ddst; 2592 2593 ssrc = ddst = 0L; 2594 /* 2595 * Pick the first AF_INET address from the list, 2596 * aliases don't make any sense on a p2p link anyway. 2597 */ 2598 for (ifa = ifp->if_addrhead.tqh_first, si = 0; 2599 ifa; 2600 ifa = ifa->ifa_link.tqe_next) 2601 if (ifa->ifa_addr->sa_family == AF_INET) { 2602 si = (struct sockaddr_in *)ifa->ifa_addr; 2603 if (si) 2604 break; 2605 } 2606 if (ifa) { 2607 if (si && si->sin_addr.s_addr) 2608 ssrc = si->sin_addr.s_addr; 2609 2610 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 2611 if (si && si->sin_addr.s_addr) 2612 ddst = si->sin_addr.s_addr; 2613 } 2614 2615 if (dst) *dst = ntohl(ddst); 2616 if (src) *src = ntohl(ssrc); 2617} 2618 2619/* 2620 * Set my IP address. Must be called at splimp. 2621 */ 2622static void 2623sppp_set_ip_addr(struct sppp *sp, u_long src) 2624{ 2625 struct ifnet *ifp = &sp->pp_if; 2626 struct ifaddr *ifa; 2627 struct sockaddr_in *si; 2628 u_long ssrc, ddst; 2629 2630 /* 2631 * Pick the first AF_INET address from the list, 2632 * aliases don't make any sense on a p2p link anyway. 2633 */ 2634 for (ifa = ifp->if_addrhead.tqh_first, si = 0; 2635 ifa; 2636 ifa = ifa->ifa_link.tqe_next) 2637 if (ifa->ifa_addr->sa_family == AF_INET) { 2638 si = (struct sockaddr_in *)ifa->ifa_addr; 2639 if (si) 2640 break; 2641 } 2642 if (ifa && si) 2643 si->sin_addr.s_addr = htonl(src); 2644} 2645 2646static const char * 2647sppp_cp_type_name(u_char type) 2648{ 2649 static char buf [12]; 2650 switch (type) { 2651 case CONF_REQ: return ("conf-req"); 2652 case CONF_ACK: return ("conf-ack"); 2653 case CONF_NAK: return ("conf-nak"); 2654 case CONF_REJ: return ("conf-rej"); 2655 case TERM_REQ: return ("term-req"); 2656 case TERM_ACK: return ("term-ack"); 2657 case CODE_REJ: return ("code-rej"); 2658 case PROTO_REJ: return ("proto-rej"); 2659 case ECHO_REQ: return ("echo-req"); 2660 case ECHO_REPLY: return ("echo-reply"); 2661 case DISC_REQ: return ("discard-req"); 2662 } 2663 sprintf (buf, "0x%x", type); 2664 return (buf); 2665} 2666 2667static const char * 2668sppp_lcp_opt_name(u_char opt) 2669{ 2670 static char buf [12]; 2671 switch (opt) { 2672 case LCP_OPT_MRU: return ("mru"); 2673 case LCP_OPT_ASYNC_MAP: return ("async-map"); 2674 case LCP_OPT_AUTH_PROTO: return ("auth-proto"); 2675 case LCP_OPT_QUAL_PROTO: return ("qual-proto"); 2676 case LCP_OPT_MAGIC: return ("magic"); 2677 case LCP_OPT_PROTO_COMP: return ("proto-comp"); 2678 case LCP_OPT_ADDR_COMP: return ("addr-comp"); 2679 } 2680 sprintf (buf, "0x%x", opt); 2681 return (buf); 2682} 2683 2684static const char * 2685sppp_ipcp_opt_name(u_char opt) 2686{ 2687 static char buf [12]; 2688 switch (opt) { 2689 case IPCP_OPT_ADDRESSES: return ("addresses"); 2690 case IPCP_OPT_COMPRESSION: return ("compression"); 2691 case IPCP_OPT_ADDRESS: return ("address"); 2692 } 2693 sprintf (buf, "0x%x", opt); 2694 return (buf); 2695} 2696 2697static const char * 2698sppp_state_name(int state) 2699{ 2700 switch (state) { 2701 case STATE_INITIAL: return "initial"; 2702 case STATE_STARTING: return "starting"; 2703 case STATE_CLOSED: return "closed"; 2704 case STATE_STOPPED: return "stopped"; 2705 case STATE_CLOSING: return "closing"; 2706 case STATE_STOPPING: return "stopping"; 2707 case STATE_REQ_SENT: return "req-sent"; 2708 case STATE_ACK_RCVD: return "ack-rcvd"; 2709 case STATE_ACK_SENT: return "ack-sent"; 2710 case STATE_OPENED: return "opened"; 2711 } 2712 return "illegal"; 2713} 2714 2715static const char * 2716sppp_phase_name(enum ppp_phase phase) 2717{ 2718 switch (phase) { 2719 case PHASE_DEAD: return "dead"; 2720 case PHASE_ESTABLISH: return "establish"; 2721 case PHASE_TERMINATE: return "terminate"; 2722 case PHASE_AUTHENTICATE: return "authenticate"; 2723 case PHASE_NETWORK: return "network"; 2724 } 2725 return "illegal"; 2726} 2727 2728static const char * 2729sppp_proto_name(u_short proto) 2730{ 2731 static char buf[12]; 2732 switch (proto) { 2733 case PPP_LCP: return "lcp"; 2734 case PPP_IPCP: return "ipcp"; 2735 } 2736 sprintf(buf, "0x%x", (unsigned)proto); 2737 return buf; 2738} 2739 2740static void 2741sppp_print_bytes(u_char *p, u_short len) 2742{ 2743 addlog(" %x", *p++); 2744 while (--len > 0) 2745 addlog("-%x", *p++); 2746} 2747 2748/* 2749 * This file is large. Tell emacs to highlight it nevertheless. 2750 * 2751 * Local Variables: 2752 * hilit-auto-highlight-maxout: 100000 2753 * End: 2754 */ 2755