if_spppsubr.c revision 1.24
1 /* $NetBSD: if_spppsubr.c,v 1.24 2001/07/17 19:12:02 martin Exp $ */ 2 3 /* 4 * Synchronous PPP/Cisco link level subroutines. 5 * Keepalive protocol implemented in both Cisco and PPP modes. 6 * 7 * Copyright (C) 1994-1996 Cronyx Engineering Ltd. 8 * Author: Serge Vakulenko, <vak (at) cronyx.ru> 9 * 10 * Heavily revamped to conform to RFC 1661. 11 * Copyright (C) 1997, Joerg Wunsch. 12 * 13 * RFC2472 IPv6CP support. 14 * Copyright (C) 2000, Jun-ichiro itojun Hagino <itojun (at) iijlab.net>. 15 * 16 * This software is distributed with NO WARRANTIES, not even the implied 17 * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 18 * 19 * Authors grant any other persons or organisations permission to use 20 * or modify this software as long as this message is kept with the software, 21 * all derivative works or modified versions. 22 * 23 * From: Version 2.4, Thu Apr 30 17:17:21 MSD 1997 24 * 25 * From: if_spppsubr.c,v 1.39 1998/04/04 13:26:03 phk Exp 26 * 27 * From: Id: if_spppsubr.c,v 1.23 1999/02/23 14:47:50 hm Exp 28 */ 29 30 #if defined(__NetBSD__) || (defined(__FreeBSD__) && __FreeBSD__ >= 3) 31 #include "opt_inet.h" 32 #include "opt_ipx.h" 33 #include "opt_iso.h" 34 #include "opt_ns.h" 35 #endif 36 37 #include <sys/param.h> 38 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/sockio.h> 42 #include <sys/socket.h> 43 #include <sys/syslog.h> 44 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 45 #include <machine/random.h> 46 #endif 47 #include <sys/malloc.h> 48 #include <sys/mbuf.h> 49 50 #if defined (__OpenBSD__) 51 #include <sys/md5k.h> 52 #else 53 #include <sys/md5.h> 54 #endif 55 56 #include <net/if.h> 57 #include <net/netisr.h> 58 #include <net/if_types.h> 59 #include <net/route.h> 60 #include <net/ppp_defs.h> 61 62 #include <machine/stdarg.h> 63 64 #include <netinet/in.h> 65 #include <netinet/in_systm.h> 66 #include <netinet/in_var.h> 67 #ifdef INET 68 #include <netinet/ip.h> 69 #include <netinet/tcp.h> 70 #endif 71 #if defined (__FreeBSD__) || defined (__OpenBSD__) 72 #include <netinet/if_ether.h> 73 #else 74 #include <net/ethertypes.h> 75 #endif 76 77 #ifdef IPX 78 #include <netipx/ipx.h> 79 #include <netipx/ipx_if.h> 80 #endif 81 82 #ifdef NS 83 #include <netns/ns.h> 84 #include <netns/ns_if.h> 85 #endif 86 87 #ifdef ISO 88 #include <netiso/argo_debug.h> 89 #include <netiso/iso.h> 90 #include <netiso/iso_var.h> 91 #include <netiso/iso_snpac.h> 92 #endif 93 94 #if defined(__FreeBSD__) || defined(__NetBSD__) 95 #include <net/if_sppp.h> 96 #else 97 #include <i4b/sppp/if_sppp.h> 98 #endif 99 #if defined(__NetBSD__) || defined (__OpenBSD__) 100 #include <machine/cpu.h> /* XXX for softnet */ 101 #endif 102 103 #define MAXALIVECNT 3 /* max. alive packets */ 104 105 /* 106 * Interface flags that can be set in an ifconfig command. 107 * 108 * Setting link0 will make the link passive, i.e. it will be marked 109 * as being administrative openable, but won't be opened to begin 110 * with. Incoming calls will be answered, or subsequent calls with 111 * -link1 will cause the administrative open of the LCP layer. 112 * 113 * Setting link1 will cause the link to auto-dial only as packets 114 * arrive to be sent. 115 * 116 * Setting IFF_DEBUG will syslog the option negotiation and state 117 * transitions at level kern.debug. Note: all logs consistently look 118 * like 119 * 120 * <if-name><unit>: <proto-name> <additional info...> 121 * 122 * with <if-name><unit> being something like "bppp0", and <proto-name> 123 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. 124 */ 125 126 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 127 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 128 129 #define CONF_REQ 1 /* PPP configure request */ 130 #define CONF_ACK 2 /* PPP configure acknowledge */ 131 #define CONF_NAK 3 /* PPP configure negative ack */ 132 #define CONF_REJ 4 /* PPP configure reject */ 133 #define TERM_REQ 5 /* PPP terminate request */ 134 #define TERM_ACK 6 /* PPP terminate acknowledge */ 135 #define CODE_REJ 7 /* PPP code reject */ 136 #define PROTO_REJ 8 /* PPP protocol reject */ 137 #define ECHO_REQ 9 /* PPP echo request */ 138 #define ECHO_REPLY 10 /* PPP echo reply */ 139 #define DISC_REQ 11 /* PPP discard request */ 140 141 #define LCP_OPT_MRU 1 /* maximum receive unit */ 142 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 143 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 144 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 145 #define LCP_OPT_MAGIC 5 /* magic number */ 146 #define LCP_OPT_RESERVED 6 /* reserved */ 147 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 148 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 149 150 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 151 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol */ 152 #define IPCP_OPT_ADDRESS 3 /* local IP address */ 153 154 #define IPV6CP_OPT_IFID 1 /* interface identifier */ 155 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 156 157 #define PAP_REQ 1 /* PAP name/password request */ 158 #define PAP_ACK 2 /* PAP acknowledge */ 159 #define PAP_NAK 3 /* PAP fail */ 160 161 #define CHAP_CHALLENGE 1 /* CHAP challenge request */ 162 #define CHAP_RESPONSE 2 /* CHAP challenge response */ 163 #define CHAP_SUCCESS 3 /* CHAP response ok */ 164 #define CHAP_FAILURE 4 /* CHAP response failed */ 165 166 #define CHAP_MD5 5 /* hash algorithm - MD5 */ 167 168 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 169 #define CISCO_UNICAST 0x0f /* Cisco unicast address */ 170 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 171 #define CISCO_ADDR_REQ 0 /* Cisco address request */ 172 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 173 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 174 175 /* states are named and numbered according to RFC 1661 */ 176 #define STATE_INITIAL 0 177 #define STATE_STARTING 1 178 #define STATE_CLOSED 2 179 #define STATE_STOPPED 3 180 #define STATE_CLOSING 4 181 #define STATE_STOPPING 5 182 #define STATE_REQ_SENT 6 183 #define STATE_ACK_RCVD 7 184 #define STATE_ACK_SENT 8 185 #define STATE_OPENED 9 186 187 struct ppp_header { 188 u_char address; 189 u_char control; 190 u_short protocol; 191 } __attribute__((__packed__)); 192 #define PPP_HEADER_LEN sizeof (struct ppp_header) 193 194 struct lcp_header { 195 u_char type; 196 u_char ident; 197 u_short len; 198 } __attribute__((__packed__)); 199 #define LCP_HEADER_LEN sizeof (struct lcp_header) 200 201 struct cisco_packet { 202 u_long type; 203 u_long par1; 204 u_long par2; 205 u_short rel; 206 u_short time0; 207 u_short time1; 208 } __attribute__((__packed__)); 209 #define CISCO_PACKET_LEN 18 210 211 /* 212 * We follow the spelling and capitalization of RFC 1661 here, to make 213 * it easier comparing with the standard. Please refer to this RFC in 214 * case you can't make sense out of these abbreviation; it will also 215 * explain the semantics related to the various events and actions. 216 */ 217 struct cp { 218 u_short proto; /* PPP control protocol number */ 219 u_char protoidx; /* index into state table in struct sppp */ 220 u_char flags; 221 #define CP_LCP 0x01 /* this is the LCP */ 222 #define CP_AUTH 0x02 /* this is an authentication protocol */ 223 #define CP_NCP 0x04 /* this is a NCP */ 224 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 225 const char *name; /* name of this control protocol */ 226 /* event handlers */ 227 void (*Up)(struct sppp *sp); 228 void (*Down)(struct sppp *sp); 229 void (*Open)(struct sppp *sp); 230 void (*Close)(struct sppp *sp); 231 void (*TO)(void *sp); 232 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len); 233 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len); 234 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len); 235 /* actions */ 236 void (*tlu)(struct sppp *sp); 237 void (*tld)(struct sppp *sp); 238 void (*tls)(struct sppp *sp); 239 void (*tlf)(struct sppp *sp); 240 void (*scr)(struct sppp *sp); 241 }; 242 243 static struct sppp *spppq; 244 #if defined(__NetBSD__) 245 static struct callout keepalive_ch; 246 #endif 247 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 248 static struct callout_handle keepalive_ch; 249 #endif 250 251 #ifdef __FreeBSD__ 252 #define SPP_FMT "%s%d: " 253 #define SPP_ARGS(ifp) (ifp)->if_name, (ifp)->if_unit 254 #else 255 #define SPP_FMT "%s: " 256 #define SPP_ARGS(ifp) (ifp)->if_xname 257 #endif 258 259 #ifdef INET 260 /* 261 * The following disgusting hack gets around the problem that IP TOS 262 * can't be set yet. We want to put "interactive" traffic on a high 263 * priority queue. To decide if traffic is interactive, we check that 264 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 265 * 266 * XXX is this really still necessary? - joerg - 267 */ 268 static u_short interactive_ports[8] = { 269 0, 513, 0, 0, 270 0, 21, 0, 23, 271 }; 272 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 273 #endif 274 275 /* almost every function needs these */ 276 #define STDDCL \ 277 struct ifnet *ifp = &sp->pp_if; \ 278 int debug = ifp->if_flags & IFF_DEBUG 279 280 static int sppp_output(struct ifnet *ifp, struct mbuf *m, 281 struct sockaddr *dst, struct rtentry *rt); 282 283 static void sppp_cisco_send(struct sppp *sp, int type, long par1, long par2); 284 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m); 285 286 static void sppp_cp_input(const struct cp *cp, struct sppp *sp, 287 struct mbuf *m); 288 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 289 u_char ident, u_short len, void *data); 290 /* static void sppp_cp_timeout(void *arg); */ 291 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp, 292 int newstate); 293 static void sppp_auth_send(const struct cp *cp, 294 struct sppp *sp, unsigned int type, unsigned int id, 295 ...); 296 297 static void sppp_up_event(const struct cp *cp, struct sppp *sp); 298 static void sppp_down_event(const struct cp *cp, struct sppp *sp); 299 static void sppp_open_event(const struct cp *cp, struct sppp *sp); 300 static void sppp_close_event(const struct cp *cp, struct sppp *sp); 301 static void sppp_to_event(const struct cp *cp, struct sppp *sp); 302 303 static void sppp_null(struct sppp *sp); 304 305 static void sppp_lcp_init(struct sppp *sp); 306 static void sppp_lcp_up(struct sppp *sp); 307 static void sppp_lcp_down(struct sppp *sp); 308 static void sppp_lcp_open(struct sppp *sp); 309 static void sppp_lcp_close(struct sppp *sp); 310 static void sppp_lcp_TO(void *sp); 311 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 312 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 313 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 314 static void sppp_lcp_tlu(struct sppp *sp); 315 static void sppp_lcp_tld(struct sppp *sp); 316 static void sppp_lcp_tls(struct sppp *sp); 317 static void sppp_lcp_tlf(struct sppp *sp); 318 static void sppp_lcp_scr(struct sppp *sp); 319 static void sppp_lcp_check_and_close(struct sppp *sp); 320 static int sppp_ncp_check(struct sppp *sp); 321 322 static void sppp_ipcp_init(struct sppp *sp); 323 static void sppp_ipcp_up(struct sppp *sp); 324 static void sppp_ipcp_down(struct sppp *sp); 325 static void sppp_ipcp_open(struct sppp *sp); 326 static void sppp_ipcp_close(struct sppp *sp); 327 static void sppp_ipcp_TO(void *sp); 328 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 329 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 330 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 331 static void sppp_ipcp_tlu(struct sppp *sp); 332 static void sppp_ipcp_tld(struct sppp *sp); 333 static void sppp_ipcp_tls(struct sppp *sp); 334 static void sppp_ipcp_tlf(struct sppp *sp); 335 static void sppp_ipcp_scr(struct sppp *sp); 336 337 static void sppp_ipv6cp_init(struct sppp *sp); 338 static void sppp_ipv6cp_up(struct sppp *sp); 339 static void sppp_ipv6cp_down(struct sppp *sp); 340 static void sppp_ipv6cp_open(struct sppp *sp); 341 static void sppp_ipv6cp_close(struct sppp *sp); 342 static void sppp_ipv6cp_TO(void *sp); 343 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len); 344 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 345 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 346 static void sppp_ipv6cp_tlu(struct sppp *sp); 347 static void sppp_ipv6cp_tld(struct sppp *sp); 348 static void sppp_ipv6cp_tls(struct sppp *sp); 349 static void sppp_ipv6cp_tlf(struct sppp *sp); 350 static void sppp_ipv6cp_scr(struct sppp *sp); 351 352 static void sppp_pap_input(struct sppp *sp, struct mbuf *m); 353 static void sppp_pap_init(struct sppp *sp); 354 static void sppp_pap_open(struct sppp *sp); 355 static void sppp_pap_close(struct sppp *sp); 356 static void sppp_pap_TO(void *sp); 357 static void sppp_pap_my_TO(void *sp); 358 static void sppp_pap_tlu(struct sppp *sp); 359 static void sppp_pap_tld(struct sppp *sp); 360 static void sppp_pap_scr(struct sppp *sp); 361 362 static void sppp_chap_input(struct sppp *sp, struct mbuf *m); 363 static void sppp_chap_init(struct sppp *sp); 364 static void sppp_chap_open(struct sppp *sp); 365 static void sppp_chap_close(struct sppp *sp); 366 static void sppp_chap_TO(void *sp); 367 static void sppp_chap_tlu(struct sppp *sp); 368 static void sppp_chap_tld(struct sppp *sp); 369 static void sppp_chap_scr(struct sppp *sp); 370 371 static const char *sppp_auth_type_name(u_short proto, u_char type); 372 static const char *sppp_cp_type_name(u_char type); 373 static const char *sppp_dotted_quad(u_long addr); 374 static const char *sppp_ipcp_opt_name(u_char opt); 375 #ifdef INET6 376 static const char *sppp_ipv6cp_opt_name(u_char opt); 377 #endif 378 static const char *sppp_lcp_opt_name(u_char opt); 379 static const char *sppp_phase_name(enum ppp_phase phase); 380 static const char *sppp_proto_name(u_short proto); 381 static const char *sppp_state_name(int state); 382 static int sppp_params(struct sppp *sp, int cmd, void *data); 383 static int sppp_strnlen(u_char *p, int max); 384 static void sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst, 385 u_long *srcmask); 386 static void sppp_keepalive(void *dummy); 387 static void sppp_phase_network(struct sppp *sp); 388 static void sppp_print_bytes(const u_char *p, u_short len); 389 static void sppp_print_string(const char *p, u_short len); 390 static void sppp_set_ip_addr(struct sppp *sp, u_long src); 391 #ifdef INET6 392 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, 393 struct in6_addr *dst, struct in6_addr *srcmask); 394 #ifdef IPV6CP_MYIFID_DYN 395 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src); 396 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src); 397 #endif 398 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src); 399 #endif 400 401 /* our control protocol descriptors */ 402 static const struct cp lcp = { 403 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 404 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close, 405 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, 406 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, 407 sppp_lcp_scr 408 }; 409 410 static const struct cp ipcp = { 411 PPP_IPCP, IDX_IPCP, 412 #ifdef INET 413 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 414 #else 415 0, 416 #endif 417 "ipcp", 418 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close, 419 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, 420 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf, 421 sppp_ipcp_scr 422 }; 423 424 static const struct cp ipv6cp = { 425 PPP_IPV6CP, IDX_IPV6CP, 426 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 427 CP_NCP, 428 #else 429 0, 430 #endif 431 "ipv6cp", 432 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close, 433 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak, 434 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf, 435 sppp_ipv6cp_scr 436 }; 437 438 static const struct cp pap = { 439 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 440 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close, 441 sppp_pap_TO, 0, 0, 0, 442 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null, 443 sppp_pap_scr 444 }; 445 446 static const struct cp chap = { 447 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 448 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close, 449 sppp_chap_TO, 0, 0, 0, 450 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null, 451 sppp_chap_scr 452 }; 453 454 static const struct cp *cps[IDX_COUNT] = { 455 &lcp, /* IDX_LCP */ 456 &ipcp, /* IDX_IPCP */ 457 &ipv6cp, /* IDX_IPV6CP */ 458 &pap, /* IDX_PAP */ 459 &chap, /* IDX_CHAP */ 460 }; 461 462 463 /* 465 * Exported functions, comprising our interface to the lower layer. 466 */ 467 468 /* 469 * Process the received packet. 470 */ 471 void 472 sppp_input(struct ifnet *ifp, struct mbuf *m) 473 { 474 struct ppp_header *h = NULL; 475 struct ifqueue *inq = 0; 476 u_int16_t protocol; 477 int s; 478 struct sppp *sp = (struct sppp *)ifp; 479 int debug = ifp->if_flags & IFF_DEBUG; 480 481 if (ifp->if_flags & IFF_UP) 482 /* Count received bytes, add hardware framing */ 483 ifp->if_ibytes += m->m_pkthdr.len + sp->pp_framebytes; 484 485 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 486 /* Too small packet, drop it. */ 487 if (debug) 488 log(LOG_DEBUG, 489 SPP_FMT "input packet is too small, %d bytes\n", 490 SPP_ARGS(ifp), m->m_pkthdr.len); 491 drop: 492 ++ifp->if_ierrors; 493 ++ifp->if_iqdrops; 494 m_freem (m); 495 return; 496 } 497 498 if (sp->pp_flags & PP_NOFRAMING) { 499 protocol = *(mtod(m, u_int16_t*)); 500 protocol = ntohs(protocol); 501 m_adj(m, 2); 502 } else { 503 504 /* Get PPP header. */ 505 h = mtod (m, struct ppp_header*); 506 m_adj (m, PPP_HEADER_LEN); 507 508 switch (h->address) { 509 case PPP_ALLSTATIONS: 510 if (h->control != PPP_UI) 511 goto invalid; 512 if (sp->pp_flags & PP_CISCO) { 513 if (debug) 514 log(LOG_DEBUG, 515 SPP_FMT "PPP packet in Cisco mode " 516 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 517 SPP_ARGS(ifp), 518 h->address, h->control, ntohs(h->protocol)); 519 goto drop; 520 } 521 break; 522 case CISCO_MULTICAST: 523 case CISCO_UNICAST: 524 /* Don't check the control field here (RFC 1547). */ 525 if (! (sp->pp_flags & PP_CISCO)) { 526 if (debug) 527 log(LOG_DEBUG, 528 SPP_FMT "Cisco packet in PPP mode " 529 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 530 SPP_ARGS(ifp), 531 h->address, h->control, ntohs(h->protocol)); 532 goto drop; 533 } 534 switch (ntohs (h->protocol)) { 535 default: 536 ++ifp->if_noproto; 537 goto invalid; 538 case CISCO_KEEPALIVE: 539 sppp_cisco_input ((struct sppp*) ifp, m); 540 m_freem (m); 541 return; 542 #ifdef INET 543 case ETHERTYPE_IP: 544 schednetisr (NETISR_IP); 545 inq = &ipintrq; 546 break; 547 #endif 548 #ifdef INET6 549 case ETHERTYPE_IPV6: 550 schednetisr (NETISR_IPV6); 551 inq = &ip6intrq; 552 break; 553 #endif 554 #ifdef IPX 555 case ETHERTYPE_IPX: 556 schednetisr (NETISR_IPX); 557 inq = &ipxintrq; 558 break; 559 #endif 560 #ifdef NS 561 case ETHERTYPE_NS: 562 schednetisr (NETISR_NS); 563 inq = &nsintrq; 564 break; 565 #endif 566 } 567 goto queue_pkt; 568 default: /* Invalid PPP packet. */ 569 invalid: 570 if (debug) 571 log(LOG_DEBUG, 572 SPP_FMT "invalid input packet " 573 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 574 SPP_ARGS(ifp), 575 h->address, h->control, ntohs(h->protocol)); 576 goto drop; 577 } 578 protocol = ntohs (h->protocol); 579 } 580 581 switch (protocol) { 582 default: 583 if (sp->state[IDX_LCP] == STATE_OPENED) { 584 u_int16_t prot = htons(protocol); 585 sppp_cp_send (sp, PPP_LCP, PROTO_REJ, 586 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2, 587 &prot); 588 } 589 if (debug) 590 log(LOG_DEBUG, 591 SPP_FMT "invalid input protocol " 592 "<proto=0x%x>\n", SPP_ARGS(ifp), ntohs(protocol)); 593 ++ifp->if_noproto; 594 goto drop; 595 case PPP_LCP: 596 sppp_cp_input(&lcp, sp, m); 597 m_freem (m); 598 return; 599 case PPP_PAP: 600 if (sp->pp_phase >= PHASE_AUTHENTICATE) 601 sppp_pap_input(sp, m); 602 m_freem (m); 603 return; 604 case PPP_CHAP: 605 if (sp->pp_phase >= PHASE_AUTHENTICATE) 606 sppp_chap_input(sp, m); 607 m_freem (m); 608 return; 609 #ifdef INET 610 case PPP_IPCP: 611 if (sp->pp_phase == PHASE_NETWORK) 612 sppp_cp_input(&ipcp, sp, m); 613 m_freem (m); 614 return; 615 case PPP_IP: 616 if (sp->state[IDX_IPCP] == STATE_OPENED) { 617 schednetisr (NETISR_IP); 618 inq = &ipintrq; 619 } 620 break; 621 #endif 622 #ifdef INET6 623 case PPP_IPV6CP: 624 if (sp->pp_phase == PHASE_NETWORK) 625 sppp_cp_input(&ipv6cp, sp, m); 626 m_freem (m); 627 return; 628 629 case PPP_IPV6: 630 if (sp->state[IDX_IPV6CP] == STATE_OPENED) { 631 schednetisr (NETISR_IPV6); 632 inq = &ip6intrq; 633 } 634 break; 635 #endif 636 #ifdef IPX 637 case PPP_IPX: 638 /* IPX IPXCP not implemented yet */ 639 if (sp->pp_phase == PHASE_NETWORK) { 640 schednetisr (NETISR_IPX); 641 inq = &ipxintrq; 642 } 643 break; 644 #endif 645 #ifdef NS 646 case PPP_XNS: 647 /* XNS IDPCP not implemented yet */ 648 if (sp->pp_phase == PHASE_NETWORK) { 649 schednetisr (NETISR_NS); 650 inq = &nsintrq; 651 } 652 break; 653 #endif 654 #ifdef ISO 655 case PPP_ISO: 656 /* OSI NLCP not implemented yet */ 657 if (sp->pp_phase == PHASE_NETWORK) { 658 schednetisr (NETISR_ISO); 659 inq = &clnlintrq; 660 } 661 break; 662 #endif 663 } 664 665 queue_pkt: 666 if (! (ifp->if_flags & IFF_UP) || ! inq) 667 goto drop; 668 669 /* Check queue. */ 670 s = splnet(); 671 if (IF_QFULL (inq)) { 672 /* Queue overflow. */ 673 IF_DROP(inq); 674 splx(s); 675 if (debug) 676 log(LOG_DEBUG, SPP_FMT "protocol queue overflow\n", 677 SPP_ARGS(ifp)); 678 goto drop; 679 } 680 IF_ENQUEUE(inq, m); 681 splx(s); 682 } 683 684 /* 685 * Enqueue transmit packet. 686 */ 687 static int 688 sppp_output(struct ifnet *ifp, struct mbuf *m, 689 struct sockaddr *dst, struct rtentry *rt) 690 { 691 struct sppp *sp = (struct sppp*) ifp; 692 struct ppp_header *h = NULL; 693 struct ifqueue *ifq = NULL; /* XXX */ 694 int s, len, rv = 0; 695 u_int16_t protocol; 696 ALTQ_DECL(struct altq_pktattr pktattr;) 697 698 s = splnet(); 699 700 if ((ifp->if_flags & IFF_UP) == 0 || 701 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 702 m_freem (m); 703 splx (s); 704 return (ENETDOWN); 705 } 706 707 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 708 /* 709 * Interface is not yet running, but auto-dial. Need 710 * to start LCP for it. 711 */ 712 ifp->if_flags |= IFF_RUNNING; 713 splx(s); 714 lcp.Open(sp); 715 s = splnet(); 716 } 717 718 /* 719 * If the queueing discipline needs packet classification, 720 * do it before prepending link headers. 721 */ 722 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr); 723 724 #ifdef INET 725 if (dst->sa_family == AF_INET) 726 { 727 /* Check mbuf length here??? */ 728 struct ip *ip = mtod (m, struct ip*); 729 struct tcphdr *tcp = (struct tcphdr*) ((long*)ip + ip->ip_hl); 730 731 /* 732 * When using dynamic local IP address assignment by using 733 * 0.0.0.0 as a local address, the first TCP session will 734 * not connect because the local TCP checksum is computed 735 * using 0.0.0.0 which will later become our real IP address 736 * so the TCP checksum computed at the remote end will 737 * become invalid. So we 738 * - don't let packets with src ip addr 0 thru 739 * - we flag TCP packets with src ip 0 as an error 740 */ 741 742 if(ip->ip_src.s_addr == INADDR_ANY) /* -hm */ 743 { 744 m_freem(m); 745 splx(s); 746 if(ip->ip_p == IPPROTO_TCP) 747 return(EADDRNOTAVAIL); 748 else 749 return(0); 750 } 751 752 /* 753 * Put low delay, telnet, rlogin and ftp control packets 754 * in front of the queue. 755 */ 756 757 if (! IF_QFULL (&sp->pp_fastq) && 758 ((ip->ip_tos & IPTOS_LOWDELAY) || 759 ((ip->ip_p == IPPROTO_TCP && 760 m->m_len >= sizeof (struct ip) + sizeof (struct tcphdr) && 761 (INTERACTIVE (ntohs (tcp->th_sport)))) || 762 INTERACTIVE (ntohs (tcp->th_dport))))) 763 ifq = &sp->pp_fastq; 764 } 765 #endif 766 767 #ifdef INET6 768 if (dst->sa_family == AF_INET6) { 769 /* XXX do something tricky here? */ 770 } 771 #endif 772 773 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 774 /* 775 * Prepend general data packet PPP header. For now, IP only. 776 */ 777 M_PREPEND (m, PPP_HEADER_LEN, M_DONTWAIT); 778 if (! m) { 779 if (ifp->if_flags & IFF_DEBUG) 780 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 781 SPP_ARGS(ifp)); 782 ++ifp->if_oerrors; 783 splx (s); 784 return (ENOBUFS); 785 } 786 /* 787 * May want to check size of packet 788 * (albeit due to the implementation it's always enough) 789 */ 790 h = mtod (m, struct ppp_header*); 791 if (sp->pp_flags & PP_CISCO) { 792 h->address = CISCO_UNICAST; /* unicast address */ 793 h->control = 0; 794 } else { 795 h->address = PPP_ALLSTATIONS; /* broadcast address */ 796 h->control = PPP_UI; /* Unnumbered Info */ 797 } 798 } 799 800 switch (dst->sa_family) { 801 #ifdef INET 802 case AF_INET: /* Internet Protocol */ 803 if (sp->pp_flags & PP_CISCO) 804 protocol = htons (ETHERTYPE_IP); 805 else { 806 /* 807 * Don't choke with an ENETDOWN early. It's 808 * possible that we just started dialing out, 809 * so don't drop the packet immediately. If 810 * we notice that we run out of buffer space 811 * below, we will however remember that we are 812 * not ready to carry IP packets, and return 813 * ENETDOWN, as opposed to ENOBUFS. 814 */ 815 protocol = htons(PPP_IP); 816 if (sp->state[IDX_IPCP] != STATE_OPENED) 817 rv = ENETDOWN; 818 } 819 break; 820 #endif 821 #ifdef INET6 822 case AF_INET6: /* Internet Protocol version 6 */ 823 if (sp->pp_flags & PP_CISCO) 824 protocol = htons (ETHERTYPE_IPV6); 825 else { 826 /* 827 * Don't choke with an ENETDOWN early. It's 828 * possible that we just started dialing out, 829 * so don't drop the packet immediately. If 830 * we notice that we run out of buffer space 831 * below, we will however remember that we are 832 * not ready to carry IP packets, and return 833 * ENETDOWN, as opposed to ENOBUFS. 834 */ 835 protocol = htons(PPP_IPV6); 836 if (sp->state[IDX_IPV6CP] != STATE_OPENED) 837 rv = ENETDOWN; 838 } 839 break; 840 #endif 841 #ifdef NS 842 case AF_NS: /* Xerox NS Protocol */ 843 protocol = htons ((sp->pp_flags & PP_CISCO) ? 844 ETHERTYPE_NS : PPP_XNS); 845 break; 846 #endif 847 #ifdef IPX 848 case AF_IPX: /* Novell IPX Protocol */ 849 protocol = htons ((sp->pp_flags & PP_CISCO) ? 850 ETHERTYPE_IPX : PPP_IPX); 851 break; 852 #endif 853 #ifdef ISO 854 case AF_ISO: /* ISO OSI Protocol */ 855 if (sp->pp_flags & PP_CISCO) 856 goto nosupport; 857 protocol = htons (PPP_ISO); 858 break; 859 nosupport: 860 #endif 861 default: 862 m_freem (m); 863 ++ifp->if_oerrors; 864 splx (s); 865 return (EAFNOSUPPORT); 866 } 867 868 if (sp->pp_flags & PP_NOFRAMING) { 869 M_PREPEND (m, 2, M_DONTWAIT); 870 if (m == NULL) { 871 if (ifp->if_flags & IFF_DEBUG) 872 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 873 SPP_ARGS(ifp)); 874 ++ifp->if_oerrors; 875 splx (s); 876 return (ENOBUFS); 877 } 878 *mtod(m, u_int16_t*) = protocol; 879 } else { 880 h->protocol = protocol; 881 } 882 883 /* 884 * Queue message on interface, and start output if interface 885 * not yet active. 886 */ 887 len = m->m_pkthdr.len; 888 if (ifq != NULL 889 #ifdef ALTQ 890 && ALTQ_IS_ENABLED(&ifp->if_snd) == 0 891 #endif 892 ) { 893 if (IF_QFULL (ifq)) { 894 IF_DROP (&ifp->if_snd); 895 m_freem (m); 896 if (rv == 0) 897 rv = ENOBUFS; 898 } 899 IF_ENQUEUE(ifq, m); 900 } else 901 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, rv); 902 if (rv != 0) { 903 ++ifp->if_oerrors; 904 splx(s); 905 return (rv); 906 } 907 908 if (! (ifp->if_flags & IFF_OACTIVE)) 909 (*ifp->if_start) (ifp); 910 911 /* 912 * Count output packets and bytes. 913 * The packet length includes header + additional hardware framing 914 * according to RFC 1333. 915 */ 916 ifp->if_obytes += len + sp->pp_framebytes; 917 splx (s); 918 return (0); 919 } 920 921 void 922 sppp_attach(struct ifnet *ifp) 923 { 924 struct sppp *sp = (struct sppp*) ifp; 925 926 /* Initialize keepalive handler. */ 927 if (! spppq) { 928 #if defined(__NetBSD__) 929 callout_init(&keepalive_ch); 930 callout_reset(&keepalive_ch, hz * 10, sppp_keepalive, NULL); 931 #else 932 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 933 keepalive_ch = 934 #endif 935 timeout(sppp_keepalive, 0, hz * 10); 936 #endif /* __NetBSD__ */ 937 } 938 939 /* Insert new entry into the keepalive list. */ 940 sp->pp_next = spppq; 941 spppq = sp; 942 943 sp->pp_if.if_type = IFT_PPP; 944 sp->pp_if.if_output = sppp_output; 945 sp->pp_fastq.ifq_maxlen = 32; 946 sp->pp_cpq.ifq_maxlen = 20; 947 sp->pp_loopcnt = 0; 948 sp->pp_alivecnt = 0; 949 bzero(&sp->pp_seq[0], sizeof(sp->pp_seq)); 950 bzero(&sp->pp_rseq[0], sizeof(sp->pp_rseq)); 951 sp->pp_phase = PHASE_DEAD; 952 sp->pp_up = lcp.Up; 953 sp->pp_down = lcp.Down; 954 955 if_alloc_sadl(ifp); 956 957 sppp_lcp_init(sp); 958 sppp_ipcp_init(sp); 959 sppp_ipv6cp_init(sp); 960 sppp_pap_init(sp); 961 sppp_chap_init(sp); 962 } 963 964 void 965 sppp_detach(struct ifnet *ifp) 966 { 967 struct sppp **q, *p, *sp = (struct sppp*) ifp; 968 int i; 969 970 /* Remove the entry from the keepalive list. */ 971 for (q = &spppq; (p = *q); q = &p->pp_next) 972 if (p == sp) { 973 *q = p->pp_next; 974 break; 975 } 976 977 /* Stop keepalive handler. */ 978 if (! spppq) { 979 #if defined(__NetBSD__) 980 callout_stop(&keepalive_ch); 981 #else 982 untimeout(sppp_keepalive, 0 983 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 984 ,keepalive_ch 985 #endif 986 ); 987 #endif /* __NetBSD__ */ 988 } 989 990 for (i = 0; i < IDX_COUNT; i++) { 991 #if defined(__NetBSD__) 992 callout_stop(&sp->ch[i]); 993 #else 994 untimeout((cps[i])->TO, (void *)sp 995 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 996 , sp->ch[i] 997 #endif 998 ); 999 #endif /* __NetBSD__ */ 1000 } 1001 #if defined(__NetBSD__) 1002 callout_stop(&sp->pap_my_to_ch); 1003 #else 1004 untimeout(sppp_pap_my_TO, (void *)sp 1005 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 1006 , sp->pap_my_to_ch 1007 #endif 1008 ); 1009 #endif /* __NetBSD__ */ 1010 1011 if_free_sadl(ifp); 1012 } 1013 1014 /* 1015 * Flush the interface output queue. 1016 */ 1017 void 1018 sppp_flush(struct ifnet *ifp) 1019 { 1020 struct sppp *sp = (struct sppp*) ifp; 1021 1022 IFQ_PURGE (&sp->pp_if.if_snd); 1023 IFQ_PURGE (&sp->pp_fastq); 1024 IFQ_PURGE (&sp->pp_cpq); 1025 } 1026 1027 /* 1028 * Check if the output queue is empty. 1029 */ 1030 int 1031 sppp_isempty(struct ifnet *ifp) 1032 { 1033 struct sppp *sp = (struct sppp*) ifp; 1034 int empty, s; 1035 1036 s = splnet(); 1037 empty = !sp->pp_fastq.ifq_head && !sp->pp_cpq.ifq_head && 1038 !sp->pp_if.if_snd.ifq_head; 1039 splx(s); 1040 return (empty); 1041 } 1042 1043 /* 1044 * Get next packet to send. 1045 */ 1046 struct mbuf * 1047 sppp_dequeue(struct ifnet *ifp) 1048 { 1049 struct sppp *sp = (struct sppp*) ifp; 1050 struct mbuf *m; 1051 int s; 1052 1053 s = splnet(); 1054 /* 1055 * Process only the control protocol queue until we have at 1056 * least one NCP open. 1057 * 1058 * Do always serve all three queues in Cisco mode. 1059 */ 1060 IF_DEQUEUE(&sp->pp_cpq, m); 1061 if (m == NULL && 1062 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1063 IF_DEQUEUE(&sp->pp_fastq, m); 1064 if (m == NULL) 1065 IF_DEQUEUE (&sp->pp_if.if_snd, m); 1066 } 1067 splx(s); 1068 return m; 1069 } 1070 1071 /* 1072 * Pick the next packet, do not remove it from the queue. 1073 */ 1074 struct mbuf * 1075 sppp_pick(struct ifnet *ifp) 1076 { 1077 struct sppp *sp = (struct sppp*)ifp; 1078 struct mbuf *m; 1079 int s; 1080 1081 s= splnet (); 1082 1083 m = sp->pp_cpq.ifq_head; 1084 if (m == NULL && 1085 (sp->pp_phase == PHASE_NETWORK || 1086 (sp->pp_flags & PP_CISCO) != 0)) 1087 if ((m = sp->pp_fastq.ifq_head) == NULL) 1088 m = sp->pp_if.if_snd.ifq_head; 1089 splx (s); 1090 return (m); 1091 } 1092 1093 /* 1094 * Process an ioctl request. Called on low priority level. 1095 */ 1096 int 1097 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1098 { 1099 struct ifreq *ifr = (struct ifreq*) data; 1100 struct sppp *sp = (struct sppp*) ifp; 1101 int s, rv, going_up, going_down, newmode; 1102 1103 s = splnet(); 1104 rv = 0; 1105 switch (cmd) { 1106 case SIOCAIFADDR: 1107 case SIOCSIFDSTADDR: 1108 break; 1109 1110 case SIOCSIFADDR: 1111 if_up(ifp); 1112 /* fall through... */ 1113 1114 case SIOCSIFFLAGS: 1115 going_up = ifp->if_flags & IFF_UP && 1116 (ifp->if_flags & IFF_RUNNING) == 0; 1117 going_down = (ifp->if_flags & IFF_UP) == 0 && 1118 ifp->if_flags & IFF_RUNNING; 1119 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1120 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1121 /* sanity */ 1122 newmode = IFF_PASSIVE; 1123 ifp->if_flags &= ~IFF_AUTO; 1124 } 1125 1126 if (going_up || going_down) 1127 lcp.Close(sp); 1128 if (going_up && newmode == 0) { 1129 /* neither auto-dial nor passive */ 1130 ifp->if_flags |= IFF_RUNNING; 1131 if (!(sp->pp_flags & PP_CISCO)) 1132 lcp.Open(sp); 1133 } else if (going_down) { 1134 sppp_flush(ifp); 1135 ifp->if_flags &= ~IFF_RUNNING; 1136 } 1137 1138 break; 1139 1140 #ifdef SIOCSIFMTU 1141 #ifndef ifr_mtu 1142 #define ifr_mtu ifr_metric 1143 #endif 1144 case SIOCSIFMTU: 1145 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru) 1146 return (EINVAL); 1147 ifp->if_mtu = ifr->ifr_mtu; 1148 break; 1149 #endif 1150 #ifdef SLIOCSETMTU 1151 case SLIOCSETMTU: 1152 if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru) 1153 return (EINVAL); 1154 ifp->if_mtu = *(short*)data; 1155 break; 1156 #endif 1157 #ifdef SIOCGIFMTU 1158 case SIOCGIFMTU: 1159 ifr->ifr_mtu = ifp->if_mtu; 1160 break; 1161 #endif 1162 #ifdef SLIOCGETMTU 1163 case SLIOCGETMTU: 1164 *(short*)data = ifp->if_mtu; 1165 break; 1166 #endif 1167 case SIOCADDMULTI: 1168 case SIOCDELMULTI: 1169 break; 1170 1171 case SIOCGIFGENERIC: 1172 case SIOCSIFGENERIC: 1173 rv = sppp_params(sp, cmd, data); 1174 break; 1175 1176 default: 1177 rv = ENOTTY; 1178 } 1179 splx(s); 1180 return rv; 1181 } 1182 1183 1184 /* 1186 * Cisco framing implementation. 1187 */ 1188 1189 /* 1190 * Handle incoming Cisco keepalive protocol packets. 1191 */ 1192 static void 1193 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1194 { 1195 STDDCL; 1196 struct cisco_packet *h; 1197 u_long me, mymask; 1198 1199 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1200 if (debug) 1201 log(LOG_DEBUG, 1202 SPP_FMT "cisco invalid packet length: %d bytes\n", 1203 SPP_ARGS(ifp), m->m_pkthdr.len); 1204 return; 1205 } 1206 h = mtod (m, struct cisco_packet*); 1207 if (debug) 1208 log(LOG_DEBUG, 1209 SPP_FMT "cisco input: %d bytes " 1210 "<0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n", 1211 SPP_ARGS(ifp), m->m_pkthdr.len, 1212 (u_long)ntohl (h->type), (u_long)h->par1, (u_long)h->par2, (u_int)h->rel, 1213 (u_int)h->time0, (u_int)h->time1); 1214 switch (ntohl (h->type)) { 1215 default: 1216 if (debug) 1217 addlog(SPP_FMT "cisco unknown packet type: 0x%lx\n", 1218 SPP_ARGS(ifp), (u_long)ntohl (h->type)); 1219 break; 1220 case CISCO_ADDR_REPLY: 1221 /* Reply on address request, ignore */ 1222 break; 1223 case CISCO_KEEPALIVE_REQ: 1224 sp->pp_alivecnt = 0; 1225 sp->pp_rseq[IDX_LCP] = ntohl (h->par1); 1226 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1227 /* Local and remote sequence numbers are equal. 1228 * Probably, the line is in loopback mode. */ 1229 if (sp->pp_loopcnt >= MAXALIVECNT) { 1230 printf (SPP_FMT "loopback\n", 1231 SPP_ARGS(ifp)); 1232 sp->pp_loopcnt = 0; 1233 if (ifp->if_flags & IFF_UP) { 1234 if_down (ifp); 1235 IFQ_PURGE (&sp->pp_cpq); 1236 } 1237 } 1238 ++sp->pp_loopcnt; 1239 1240 /* Generate new local sequence number */ 1241 #if defined(__NetBSD__) || (defined(__FreeBSD__) && __FreeBSD__ >= 3) 1242 sp->pp_seq[IDX_LCP] = random(); 1243 #else 1244 sp->pp_seq[IDX_LCP] ^= time.tv_sec ^ time.tv_usec; 1245 #endif 1246 break; 1247 } 1248 sp->pp_loopcnt = 0; 1249 if (! (ifp->if_flags & IFF_UP) && 1250 (ifp->if_flags & IFF_RUNNING)) { 1251 if_up(ifp); 1252 printf (SPP_FMT "up\n", SPP_ARGS(ifp)); 1253 } 1254 break; 1255 case CISCO_ADDR_REQ: 1256 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1257 if (me != 0L) 1258 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1259 break; 1260 } 1261 } 1262 1263 /* 1264 * Send Cisco keepalive packet. 1265 */ 1266 static void 1267 sppp_cisco_send(struct sppp *sp, int type, long par1, long par2) 1268 { 1269 STDDCL; 1270 struct ppp_header *h; 1271 struct cisco_packet *ch; 1272 struct mbuf *m; 1273 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 1274 struct timeval tv; 1275 #else 1276 u_long t = (time.tv_sec - boottime.tv_sec) * 1000; 1277 #endif 1278 1279 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 1280 getmicrouptime(&tv); 1281 #endif 1282 1283 MGETHDR (m, M_DONTWAIT, MT_DATA); 1284 if (! m) 1285 return; 1286 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1287 m->m_pkthdr.rcvif = 0; 1288 1289 h = mtod (m, struct ppp_header*); 1290 h->address = CISCO_MULTICAST; 1291 h->control = 0; 1292 h->protocol = htons (CISCO_KEEPALIVE); 1293 1294 ch = (struct cisco_packet*) (h + 1); 1295 ch->type = htonl (type); 1296 ch->par1 = htonl (par1); 1297 ch->par2 = htonl (par2); 1298 ch->rel = -1; 1299 1300 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 1301 ch->time0 = htons ((u_short) (tv.tv_sec >> 16)); 1302 ch->time1 = htons ((u_short) tv.tv_sec); 1303 #else 1304 ch->time0 = htons ((u_short) (t >> 16)); 1305 ch->time1 = htons ((u_short) t); 1306 #endif 1307 1308 if (debug) 1309 log(LOG_DEBUG, 1310 SPP_FMT "cisco output: <0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n", 1311 SPP_ARGS(ifp), (u_long)ntohl (ch->type), (u_long)ch->par1, 1312 (u_long)ch->par2, (u_int)ch->rel, (u_int)ch->time0, (u_int)ch->time1); 1313 1314 if (IF_QFULL (&sp->pp_cpq)) { 1315 IF_DROP (&sp->pp_fastq); 1316 IF_DROP (&ifp->if_snd); 1317 m_freem (m); 1318 } else 1319 IF_ENQUEUE (&sp->pp_cpq, m); 1320 if (! (ifp->if_flags & IFF_OACTIVE)) 1321 (*ifp->if_start) (ifp); 1322 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1323 } 1324 1325 /* 1327 * PPP protocol implementation. 1328 */ 1329 1330 /* 1331 * Send PPP control protocol packet. 1332 */ 1333 static void 1334 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1335 u_char ident, u_short len, void *data) 1336 { 1337 STDDCL; 1338 struct lcp_header *lh; 1339 struct mbuf *m; 1340 size_t pkthdrlen; 1341 1342 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1343 1344 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1345 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1346 MGETHDR (m, M_DONTWAIT, MT_DATA); 1347 if (! m) 1348 return; 1349 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1350 m->m_pkthdr.rcvif = 0; 1351 1352 if (sp->pp_flags & PP_NOFRAMING) { 1353 *mtod(m, u_int16_t*) = htons(proto); 1354 lh = (struct lcp_header*)(mtod(m, u_int8_t*) + 2); 1355 } else { 1356 struct ppp_header *h; 1357 h = mtod (m, struct ppp_header*); 1358 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1359 h->control = PPP_UI; /* Unnumbered Info */ 1360 h->protocol = htons (proto); /* Link Control Protocol */ 1361 lh = (struct lcp_header*) (h + 1); 1362 } 1363 lh->type = type; 1364 lh->ident = ident; 1365 lh->len = htons (LCP_HEADER_LEN + len); 1366 if (len) 1367 bcopy (data, lh+1, len); 1368 1369 if (debug) { 1370 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 1371 SPP_ARGS(ifp), 1372 sppp_proto_name(proto), 1373 sppp_cp_type_name (lh->type), lh->ident, 1374 ntohs (lh->len)); 1375 if (len) 1376 sppp_print_bytes ((u_char*) (lh+1), len); 1377 addlog(">\n"); 1378 } 1379 if (IF_QFULL (&sp->pp_cpq)) { 1380 IF_DROP (&sp->pp_fastq); 1381 IF_DROP (&ifp->if_snd); 1382 m_freem (m); 1383 ++ifp->if_oerrors; 1384 } else 1385 IF_ENQUEUE (&sp->pp_cpq, m); 1386 if (! (ifp->if_flags & IFF_OACTIVE)) 1387 (*ifp->if_start) (ifp); 1388 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1389 } 1390 1391 /* 1392 * Handle incoming PPP control protocol packets. 1393 */ 1394 static void 1395 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1396 { 1397 STDDCL; 1398 struct lcp_header *h; 1399 int len = m->m_pkthdr.len; 1400 int rv; 1401 u_char *p; 1402 1403 if (len < 4) { 1404 if (debug) 1405 log(LOG_DEBUG, 1406 SPP_FMT "%s invalid packet length: %d bytes\n", 1407 SPP_ARGS(ifp), cp->name, len); 1408 return; 1409 } 1410 h = mtod (m, struct lcp_header*); 1411 if (debug) { 1412 log(LOG_DEBUG, 1413 SPP_FMT "%s input(%s): <%s id=0x%x len=%d", 1414 SPP_ARGS(ifp), cp->name, 1415 sppp_state_name(sp->state[cp->protoidx]), 1416 sppp_cp_type_name (h->type), h->ident, ntohs (h->len)); 1417 if (len > 4) 1418 sppp_print_bytes ((u_char*) (h+1), len-4); 1419 addlog(">\n"); 1420 } 1421 if (len > ntohs (h->len)) 1422 len = ntohs (h->len); 1423 p = (u_char *)(h + 1); 1424 switch (h->type) { 1425 case CONF_REQ: 1426 if (len < 4) { 1427 if (debug) 1428 addlog(SPP_FMT "%s invalid conf-req length %d\n", 1429 SPP_ARGS(ifp), cp->name, 1430 len); 1431 ++ifp->if_ierrors; 1432 break; 1433 } 1434 /* handle states where RCR doesn't get a SCA/SCN */ 1435 switch (sp->state[cp->protoidx]) { 1436 case STATE_CLOSING: 1437 case STATE_STOPPING: 1438 return; 1439 case STATE_CLOSED: 1440 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1441 0, 0); 1442 return; 1443 } 1444 rv = (cp->RCR)(sp, h, len); 1445 switch (sp->state[cp->protoidx]) { 1446 case STATE_OPENED: 1447 (cp->tld)(sp); 1448 (cp->scr)(sp); 1449 /* fall through... */ 1450 case STATE_ACK_SENT: 1451 case STATE_REQ_SENT: 1452 sppp_cp_change_state(cp, sp, rv? 1453 STATE_ACK_SENT: STATE_REQ_SENT); 1454 break; 1455 case STATE_STOPPED: 1456 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1457 (cp->scr)(sp); 1458 sppp_cp_change_state(cp, sp, rv? 1459 STATE_ACK_SENT: STATE_REQ_SENT); 1460 break; 1461 case STATE_ACK_RCVD: 1462 if (rv) { 1463 sppp_cp_change_state(cp, sp, STATE_OPENED); 1464 if (debug) 1465 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1466 SPP_ARGS(ifp), 1467 cp->name); 1468 (cp->tlu)(sp); 1469 } else 1470 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1471 break; 1472 default: 1473 printf(SPP_FMT "%s illegal %s in state %s\n", 1474 SPP_ARGS(ifp), cp->name, 1475 sppp_cp_type_name(h->type), 1476 sppp_state_name(sp->state[cp->protoidx])); 1477 ++ifp->if_ierrors; 1478 } 1479 break; 1480 case CONF_ACK: 1481 if (h->ident != sp->confid[cp->protoidx]) { 1482 if (debug) 1483 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1484 SPP_ARGS(ifp), cp->name, 1485 h->ident, sp->confid[cp->protoidx]); 1486 ++ifp->if_ierrors; 1487 break; 1488 } 1489 switch (sp->state[cp->protoidx]) { 1490 case STATE_CLOSED: 1491 case STATE_STOPPED: 1492 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1493 break; 1494 case STATE_CLOSING: 1495 case STATE_STOPPING: 1496 break; 1497 case STATE_REQ_SENT: 1498 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1499 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1500 break; 1501 case STATE_OPENED: 1502 (cp->tld)(sp); 1503 /* fall through */ 1504 case STATE_ACK_RCVD: 1505 (cp->scr)(sp); 1506 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1507 break; 1508 case STATE_ACK_SENT: 1509 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1510 sppp_cp_change_state(cp, sp, STATE_OPENED); 1511 if (debug) 1512 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1513 SPP_ARGS(ifp), cp->name); 1514 (cp->tlu)(sp); 1515 break; 1516 default: 1517 printf(SPP_FMT "%s illegal %s in state %s\n", 1518 SPP_ARGS(ifp), cp->name, 1519 sppp_cp_type_name(h->type), 1520 sppp_state_name(sp->state[cp->protoidx])); 1521 ++ifp->if_ierrors; 1522 } 1523 break; 1524 case CONF_NAK: 1525 case CONF_REJ: 1526 if (h->ident != sp->confid[cp->protoidx]) { 1527 if (debug) 1528 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1529 SPP_ARGS(ifp), cp->name, 1530 h->ident, sp->confid[cp->protoidx]); 1531 ++ifp->if_ierrors; 1532 break; 1533 } 1534 if (h->type == CONF_NAK) 1535 (cp->RCN_nak)(sp, h, len); 1536 else /* CONF_REJ */ 1537 (cp->RCN_rej)(sp, h, len); 1538 1539 switch (sp->state[cp->protoidx]) { 1540 case STATE_CLOSED: 1541 case STATE_STOPPED: 1542 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1543 break; 1544 case STATE_REQ_SENT: 1545 case STATE_ACK_SENT: 1546 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1547 (cp->scr)(sp); 1548 break; 1549 case STATE_OPENED: 1550 (cp->tld)(sp); 1551 /* fall through */ 1552 case STATE_ACK_RCVD: 1553 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1554 (cp->scr)(sp); 1555 break; 1556 case STATE_CLOSING: 1557 case STATE_STOPPING: 1558 break; 1559 default: 1560 printf(SPP_FMT "%s illegal %s in state %s\n", 1561 SPP_ARGS(ifp), cp->name, 1562 sppp_cp_type_name(h->type), 1563 sppp_state_name(sp->state[cp->protoidx])); 1564 ++ifp->if_ierrors; 1565 } 1566 break; 1567 1568 case TERM_REQ: 1569 switch (sp->state[cp->protoidx]) { 1570 case STATE_ACK_RCVD: 1571 case STATE_ACK_SENT: 1572 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1573 /* fall through */ 1574 case STATE_CLOSED: 1575 case STATE_STOPPED: 1576 case STATE_CLOSING: 1577 case STATE_STOPPING: 1578 case STATE_REQ_SENT: 1579 sta: 1580 /* Send Terminate-Ack packet. */ 1581 if (debug) 1582 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n", 1583 SPP_ARGS(ifp), cp->name); 1584 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1585 break; 1586 case STATE_OPENED: 1587 (cp->tld)(sp); 1588 sp->rst_counter[cp->protoidx] = 0; 1589 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1590 goto sta; 1591 break; 1592 default: 1593 printf(SPP_FMT "%s illegal %s in state %s\n", 1594 SPP_ARGS(ifp), cp->name, 1595 sppp_cp_type_name(h->type), 1596 sppp_state_name(sp->state[cp->protoidx])); 1597 ++ifp->if_ierrors; 1598 } 1599 break; 1600 case TERM_ACK: 1601 switch (sp->state[cp->protoidx]) { 1602 case STATE_CLOSED: 1603 case STATE_STOPPED: 1604 case STATE_REQ_SENT: 1605 case STATE_ACK_SENT: 1606 break; 1607 case STATE_CLOSING: 1608 (cp->tlf)(sp); 1609 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1610 sppp_lcp_check_and_close(sp); 1611 break; 1612 case STATE_STOPPING: 1613 (cp->tlf)(sp); 1614 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1615 sppp_lcp_check_and_close(sp); 1616 break; 1617 case STATE_ACK_RCVD: 1618 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1619 break; 1620 case STATE_OPENED: 1621 (cp->tld)(sp); 1622 (cp->scr)(sp); 1623 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1624 break; 1625 default: 1626 printf(SPP_FMT "%s illegal %s in state %s\n", 1627 SPP_ARGS(ifp), cp->name, 1628 sppp_cp_type_name(h->type), 1629 sppp_state_name(sp->state[cp->protoidx])); 1630 ++ifp->if_ierrors; 1631 } 1632 break; 1633 case CODE_REJ: 1634 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1635 log(LOG_INFO, 1636 SPP_FMT "%s: ignoring RXJ (%s) for code ?, " 1637 "danger will robinson\n", 1638 SPP_ARGS(ifp), cp->name, 1639 sppp_cp_type_name(h->type)); 1640 switch (sp->state[cp->protoidx]) { 1641 case STATE_CLOSED: 1642 case STATE_STOPPED: 1643 case STATE_REQ_SENT: 1644 case STATE_ACK_SENT: 1645 case STATE_CLOSING: 1646 case STATE_STOPPING: 1647 case STATE_OPENED: 1648 break; 1649 case STATE_ACK_RCVD: 1650 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1651 break; 1652 default: 1653 printf(SPP_FMT "%s illegal %s in state %s\n", 1654 SPP_ARGS(ifp), cp->name, 1655 sppp_cp_type_name(h->type), 1656 sppp_state_name(sp->state[cp->protoidx])); 1657 ++ifp->if_ierrors; 1658 } 1659 break; 1660 case PROTO_REJ: 1661 { 1662 int catastrophic; 1663 const struct cp *upper; 1664 int i; 1665 u_int16_t proto; 1666 1667 catastrophic = 0; 1668 upper = NULL; 1669 proto = ntohs(*((u_int16_t *)p)); 1670 for (i = 0; i < IDX_COUNT; i++) { 1671 if (cps[i]->proto == proto) { 1672 upper = cps[i]; 1673 break; 1674 } 1675 } 1676 if (upper == NULL) 1677 catastrophic++; 1678 1679 log(LOG_INFO, 1680 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1681 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+', 1682 sppp_cp_type_name(h->type), proto, 1683 upper ? upper->name : "unknown", 1684 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1685 1686 /* 1687 * if we got RXJ+ against conf-req, the peer does not implement 1688 * this particular protocol type. terminate the protocol. 1689 */ 1690 if (upper && !catastrophic) { 1691 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1692 upper->Close(sp); 1693 break; 1694 } 1695 } 1696 1697 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1698 switch (sp->state[cp->protoidx]) { 1699 case STATE_CLOSED: 1700 case STATE_STOPPED: 1701 case STATE_REQ_SENT: 1702 case STATE_ACK_SENT: 1703 case STATE_CLOSING: 1704 case STATE_STOPPING: 1705 case STATE_OPENED: 1706 break; 1707 case STATE_ACK_RCVD: 1708 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1709 break; 1710 default: 1711 printf(SPP_FMT "%s illegal %s in state %s\n", 1712 SPP_ARGS(ifp), cp->name, 1713 sppp_cp_type_name(h->type), 1714 sppp_state_name(sp->state[cp->protoidx])); 1715 ++ifp->if_ierrors; 1716 } 1717 break; 1718 } 1719 case DISC_REQ: 1720 if (cp->proto != PPP_LCP) 1721 goto illegal; 1722 /* Discard the packet. */ 1723 break; 1724 case ECHO_REQ: 1725 if (cp->proto != PPP_LCP) 1726 goto illegal; 1727 if (sp->state[cp->protoidx] != STATE_OPENED) { 1728 if (debug) 1729 addlog(SPP_FMT "lcp echo req but lcp closed\n", 1730 SPP_ARGS(ifp)); 1731 ++ifp->if_ierrors; 1732 break; 1733 } 1734 if (len < 8) { 1735 if (debug) 1736 addlog(SPP_FMT "invalid lcp echo request " 1737 "packet length: %d bytes\n", 1738 SPP_ARGS(ifp), len); 1739 break; 1740 } 1741 if (ntohl (*(long*)(h+1)) == sp->lcp.magic) { 1742 /* Line loopback mode detected. */ 1743 printf(SPP_FMT "loopback\n", SPP_ARGS(ifp)); 1744 if_down (ifp); 1745 IFQ_PURGE (&sp->pp_cpq); 1746 1747 /* Shut down the PPP link. */ 1748 /* XXX */ 1749 lcp.Down(sp); 1750 lcp.Up(sp); 1751 break; 1752 } 1753 *(long*)(h+1) = htonl (sp->lcp.magic); 1754 if (debug) 1755 addlog(SPP_FMT "got lcp echo req, sending echo rep\n", 1756 SPP_ARGS(ifp)); 1757 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1); 1758 break; 1759 case ECHO_REPLY: 1760 if (cp->proto != PPP_LCP) 1761 goto illegal; 1762 if (h->ident != sp->lcp.echoid) { 1763 ++ifp->if_ierrors; 1764 break; 1765 } 1766 if (len < 8) { 1767 if (debug) 1768 addlog(SPP_FMT "lcp invalid echo reply " 1769 "packet length: %d bytes\n", 1770 SPP_ARGS(ifp), len); 1771 break; 1772 } 1773 if (debug) 1774 addlog(SPP_FMT "lcp got echo rep\n", 1775 SPP_ARGS(ifp)); 1776 if (ntohl (*(long*)(h+1)) != sp->lcp.magic) 1777 sp->pp_alivecnt = 0; 1778 break; 1779 default: 1780 /* Unknown packet type -- send Code-Reject packet. */ 1781 illegal: 1782 if (debug) 1783 addlog(SPP_FMT "%s send code-rej for 0x%x\n", 1784 SPP_ARGS(ifp), cp->name, h->type); 1785 sppp_cp_send(sp, cp->proto, CODE_REJ, 1786 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1787 ++ifp->if_ierrors; 1788 } 1789 } 1790 1791 1792 /* 1793 * The generic part of all Up/Down/Open/Close/TO event handlers. 1794 * Basically, the state transition handling in the automaton. 1795 */ 1796 static void 1797 sppp_up_event(const struct cp *cp, struct sppp *sp) 1798 { 1799 STDDCL; 1800 1801 if (debug) 1802 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n", 1803 SPP_ARGS(ifp), cp->name, 1804 sppp_state_name(sp->state[cp->protoidx])); 1805 1806 switch (sp->state[cp->protoidx]) { 1807 case STATE_INITIAL: 1808 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1809 break; 1810 case STATE_STARTING: 1811 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1812 (cp->scr)(sp); 1813 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1814 break; 1815 default: 1816 printf(SPP_FMT "%s illegal up in state %s\n", 1817 SPP_ARGS(ifp), cp->name, 1818 sppp_state_name(sp->state[cp->protoidx])); 1819 } 1820 } 1821 1822 static void 1823 sppp_down_event(const struct cp *cp, struct sppp *sp) 1824 { 1825 STDDCL; 1826 1827 if (debug) 1828 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n", 1829 SPP_ARGS(ifp), cp->name, 1830 sppp_state_name(sp->state[cp->protoidx])); 1831 1832 switch (sp->state[cp->protoidx]) { 1833 case STATE_CLOSED: 1834 case STATE_CLOSING: 1835 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1836 break; 1837 case STATE_STOPPED: 1838 (cp->tls)(sp); 1839 /* fall through */ 1840 case STATE_STOPPING: 1841 case STATE_REQ_SENT: 1842 case STATE_ACK_RCVD: 1843 case STATE_ACK_SENT: 1844 sppp_cp_change_state(cp, sp, STATE_STARTING); 1845 break; 1846 case STATE_OPENED: 1847 (cp->tld)(sp); 1848 sppp_cp_change_state(cp, sp, STATE_STARTING); 1849 break; 1850 default: 1851 printf(SPP_FMT "%s illegal down in state %s\n", 1852 SPP_ARGS(ifp), cp->name, 1853 sppp_state_name(sp->state[cp->protoidx])); 1854 } 1855 } 1856 1857 1858 static void 1859 sppp_open_event(const struct cp *cp, struct sppp *sp) 1860 { 1861 STDDCL; 1862 1863 if (debug) 1864 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n", 1865 SPP_ARGS(ifp), cp->name, 1866 sppp_state_name(sp->state[cp->protoidx])); 1867 1868 switch (sp->state[cp->protoidx]) { 1869 case STATE_INITIAL: 1870 (cp->tls)(sp); 1871 sppp_cp_change_state(cp, sp, STATE_STARTING); 1872 break; 1873 case STATE_STARTING: 1874 break; 1875 case STATE_CLOSED: 1876 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1877 (cp->scr)(sp); 1878 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1879 break; 1880 case STATE_STOPPED: 1881 case STATE_STOPPING: 1882 case STATE_REQ_SENT: 1883 case STATE_ACK_RCVD: 1884 case STATE_ACK_SENT: 1885 case STATE_OPENED: 1886 break; 1887 case STATE_CLOSING: 1888 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1889 break; 1890 } 1891 } 1892 1893 1894 static void 1895 sppp_close_event(const struct cp *cp, struct sppp *sp) 1896 { 1897 STDDCL; 1898 1899 if (debug) 1900 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n", 1901 SPP_ARGS(ifp), cp->name, 1902 sppp_state_name(sp->state[cp->protoidx])); 1903 1904 switch (sp->state[cp->protoidx]) { 1905 case STATE_INITIAL: 1906 case STATE_CLOSED: 1907 case STATE_CLOSING: 1908 break; 1909 case STATE_STARTING: 1910 (cp->tlf)(sp); 1911 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1912 break; 1913 case STATE_STOPPED: 1914 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1915 break; 1916 case STATE_STOPPING: 1917 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1918 break; 1919 case STATE_OPENED: 1920 (cp->tld)(sp); 1921 /* fall through */ 1922 case STATE_REQ_SENT: 1923 case STATE_ACK_RCVD: 1924 case STATE_ACK_SENT: 1925 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 1926 sppp_cp_send(sp, cp->proto, TERM_REQ, 1927 ++sp->pp_seq[cp->protoidx], 0, 0); 1928 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1929 break; 1930 } 1931 } 1932 1933 static void 1934 sppp_to_event(const struct cp *cp, struct sppp *sp) 1935 { 1936 STDDCL; 1937 int s; 1938 1939 s = splnet(); 1940 if (debug) 1941 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n", 1942 SPP_ARGS(ifp), cp->name, 1943 sppp_state_name(sp->state[cp->protoidx]), 1944 sp->rst_counter[cp->protoidx]); 1945 1946 if (--sp->rst_counter[cp->protoidx] < 0) 1947 /* TO- event */ 1948 switch (sp->state[cp->protoidx]) { 1949 case STATE_CLOSING: 1950 (cp->tlf)(sp); 1951 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1952 sppp_lcp_check_and_close(sp); 1953 break; 1954 case STATE_STOPPING: 1955 (cp->tlf)(sp); 1956 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1957 sppp_lcp_check_and_close(sp); 1958 break; 1959 case STATE_REQ_SENT: 1960 case STATE_ACK_RCVD: 1961 case STATE_ACK_SENT: 1962 (cp->tlf)(sp); 1963 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1964 sppp_lcp_check_and_close(sp); 1965 break; 1966 } 1967 else 1968 /* TO+ event */ 1969 switch (sp->state[cp->protoidx]) { 1970 case STATE_CLOSING: 1971 case STATE_STOPPING: 1972 sppp_cp_send(sp, cp->proto, TERM_REQ, 1973 ++sp->pp_seq[cp->protoidx], 0, 0); 1974 #if defined(__NetBSD__) 1975 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1976 cp->TO, sp); 1977 #else 1978 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 1979 sp->ch[cp->protoidx] = 1980 #endif 1981 timeout(cp->TO, (void *)sp, sp->lcp.timeout); 1982 #endif /* __NetBSD__ */ 1983 break; 1984 case STATE_REQ_SENT: 1985 case STATE_ACK_RCVD: 1986 (cp->scr)(sp); 1987 /* sppp_cp_change_state() will restart the timer */ 1988 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1989 break; 1990 case STATE_ACK_SENT: 1991 (cp->scr)(sp); 1992 #if defined(__NetBSD__) 1993 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1994 cp->TO, sp); 1995 #else 1996 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 1997 sp->ch[cp->protoidx] = 1998 #endif 1999 timeout(cp->TO, (void *)sp, sp->lcp.timeout); 2000 #endif /* __NetBSD__ */ 2001 break; 2002 } 2003 2004 splx(s); 2005 } 2006 2007 /* 2008 * Change the state of a control protocol in the state automaton. 2009 * Takes care of starting/stopping the restart timer. 2010 */ 2011 void 2012 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 2013 { 2014 sp->state[cp->protoidx] = newstate; 2015 2016 #if defined(__NetBSD__) 2017 callout_stop(&sp->ch[cp->protoidx]); 2018 #else 2019 untimeout(cp->TO, (void *)sp 2020 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 2021 , sp->ch[cp->protoidx] 2022 #endif 2023 ); 2024 #endif /* __NetBSD__ */ 2025 switch (newstate) { 2026 case STATE_INITIAL: 2027 case STATE_STARTING: 2028 case STATE_CLOSED: 2029 case STATE_STOPPED: 2030 case STATE_OPENED: 2031 break; 2032 case STATE_CLOSING: 2033 case STATE_STOPPING: 2034 case STATE_REQ_SENT: 2035 case STATE_ACK_RCVD: 2036 case STATE_ACK_SENT: 2037 #if defined(__NetBSD__) 2038 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 2039 cp->TO, sp); 2040 #else 2041 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 2042 sp->ch[cp->protoidx] = 2043 #endif 2044 timeout(cp->TO, (void *)sp, sp->lcp.timeout); 2045 #endif /* __NetBSD__ */ 2046 break; 2047 } 2048 } 2049 /* 2051 *--------------------------------------------------------------------------* 2052 * * 2053 * The LCP implementation. * 2054 * * 2055 *--------------------------------------------------------------------------* 2056 */ 2057 static void 2058 sppp_lcp_init(struct sppp *sp) 2059 { 2060 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 2061 sp->lcp.magic = 0; 2062 sp->state[IDX_LCP] = STATE_INITIAL; 2063 sp->fail_counter[IDX_LCP] = 0; 2064 sp->pp_seq[IDX_LCP] = 0; 2065 sp->pp_rseq[IDX_LCP] = 0; 2066 sp->lcp.protos = 0; 2067 sp->lcp.mru = sp->lcp.their_mru = PP_MTU; 2068 2069 /* 2070 * Initialize counters and timeout values. Note that we don't 2071 * use the 3 seconds suggested in RFC 1661 since we are likely 2072 * running on a fast link. XXX We should probably implement 2073 * the exponential backoff option. Note that these values are 2074 * relevant for all control protocols, not just LCP only. 2075 */ 2076 sp->lcp.timeout = 1 * hz; 2077 sp->lcp.max_terminate = 2; 2078 sp->lcp.max_configure = 10; 2079 sp->lcp.max_failure = 10; 2080 #if defined(__NetBSD__) 2081 callout_init(&sp->ch[IDX_LCP]); 2082 #endif 2083 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 2084 callout_handle_init(&sp->ch[IDX_LCP]); 2085 #endif 2086 } 2087 2088 static void 2089 sppp_lcp_up(struct sppp *sp) 2090 { 2091 STDDCL; 2092 2093 /* 2094 * If this interface is passive or dial-on-demand, and we are 2095 * still in Initial state, it means we've got an incoming 2096 * call. Activate the interface. 2097 */ 2098 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2099 if (debug) 2100 log(LOG_DEBUG, 2101 SPP_FMT "Up event", SPP_ARGS(ifp)); 2102 ifp->if_flags |= IFF_RUNNING; 2103 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2104 if (debug) 2105 addlog("(incoming call)\n"); 2106 sp->pp_flags |= PP_CALLIN; 2107 lcp.Open(sp); 2108 } else if (debug) 2109 addlog("\n"); 2110 } 2111 2112 sppp_up_event(&lcp, sp); 2113 } 2114 2115 static void 2116 sppp_lcp_down(struct sppp *sp) 2117 { 2118 STDDCL; 2119 2120 sppp_down_event(&lcp, sp); 2121 2122 /* 2123 * If this is neither a dial-on-demand nor a passive 2124 * interface, simulate an ``ifconfig down'' action, so the 2125 * administrator can force a redial by another ``ifconfig 2126 * up''. XXX For leased line operation, should we immediately 2127 * try to reopen the connection here? 2128 */ 2129 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2130 log(LOG_INFO, 2131 SPP_FMT "Down event (carrier loss), taking interface down.\n", 2132 SPP_ARGS(ifp)); 2133 if_down(ifp); 2134 } else { 2135 if (debug) 2136 log(LOG_DEBUG, 2137 SPP_FMT "Down event (carrier loss)\n", 2138 SPP_ARGS(ifp)); 2139 } 2140 sp->pp_flags &= ~PP_CALLIN; 2141 if (sp->state[IDX_LCP] != STATE_INITIAL) 2142 lcp.Close(sp); 2143 ifp->if_flags &= ~IFF_RUNNING; 2144 } 2145 2146 static void 2147 sppp_lcp_open(struct sppp *sp) 2148 { 2149 /* 2150 * If we are authenticator, negotiate LCP_AUTH 2151 */ 2152 if (sp->hisauth.proto != 0) 2153 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2154 else 2155 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2156 sp->pp_flags &= ~PP_NEEDAUTH; 2157 sppp_open_event(&lcp, sp); 2158 } 2159 2160 static void 2161 sppp_lcp_close(struct sppp *sp) 2162 { 2163 sppp_close_event(&lcp, sp); 2164 } 2165 2166 static void 2167 sppp_lcp_TO(void *cookie) 2168 { 2169 sppp_to_event(&lcp, (struct sppp *)cookie); 2170 } 2171 2172 /* 2173 * Analyze a configure request. Return true if it was agreeable, and 2174 * caused action sca, false if it has been rejected or nak'ed, and 2175 * caused action scn. (The return value is used to make the state 2176 * transition decision in the state automaton.) 2177 */ 2178 static int 2179 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2180 { 2181 STDDCL; 2182 u_char *buf, *r, *p; 2183 int origlen, rlen; 2184 u_long nmagic; 2185 u_short authproto; 2186 2187 len -= 4; 2188 origlen = len; 2189 buf = r = malloc (len, M_TEMP, M_NOWAIT); 2190 if (! buf) 2191 return (0); 2192 2193 if (debug) 2194 log(LOG_DEBUG, SPP_FMT "lcp parse opts:", 2195 SPP_ARGS(ifp)); 2196 2197 /* pass 1: check for things that need to be rejected */ 2198 p = (void*) (h+1); 2199 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2200 if (debug) 2201 addlog(" %s", sppp_lcp_opt_name(*p)); 2202 switch (*p) { 2203 case LCP_OPT_MAGIC: 2204 /* Magic number. */ 2205 /* fall through, both are same length */ 2206 case LCP_OPT_ASYNC_MAP: 2207 /* Async control character map. */ 2208 if (len >= 6 || p[1] == 6) 2209 continue; 2210 if (debug) 2211 addlog(" [invalid]"); 2212 break; 2213 case LCP_OPT_MRU: 2214 /* Maximum receive unit. */ 2215 if (len >= 4 && p[1] == 4) 2216 continue; 2217 if (debug) 2218 addlog(" [invalid]"); 2219 break; 2220 case LCP_OPT_AUTH_PROTO: 2221 if (len < 4) { 2222 if (debug) 2223 addlog(" [invalid]"); 2224 break; 2225 } 2226 authproto = (p[2] << 8) + p[3]; 2227 if (authproto == PPP_CHAP && p[1] != 5) { 2228 if (debug) 2229 addlog(" [invalid chap len]"); 2230 break; 2231 } 2232 if (sp->myauth.proto == 0) { 2233 /* we are not configured to do auth */ 2234 if (debug) 2235 addlog(" [not configured]"); 2236 break; 2237 } 2238 /* 2239 * Remote want us to authenticate, remember this, 2240 * so we stay in PHASE_AUTHENTICATE after LCP got 2241 * up. 2242 */ 2243 sp->pp_flags |= PP_NEEDAUTH; 2244 continue; 2245 default: 2246 /* Others not supported. */ 2247 if (debug) 2248 addlog(" [rej]"); 2249 break; 2250 } 2251 /* Add the option to rejected list. */ 2252 bcopy (p, r, p[1]); 2253 r += p[1]; 2254 rlen += p[1]; 2255 } 2256 if (rlen) { 2257 if (debug) 2258 addlog(" send conf-rej\n"); 2259 sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2260 goto end; 2261 } else if (debug) 2262 addlog("\n"); 2263 2264 /* 2265 * pass 2: check for option values that are unacceptable and 2266 * thus require to be nak'ed. 2267 */ 2268 if (debug) 2269 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ", 2270 SPP_ARGS(ifp)); 2271 2272 p = (void*) (h+1); 2273 len = origlen; 2274 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2275 if (debug) 2276 addlog(" %s", sppp_lcp_opt_name(*p)); 2277 switch (*p) { 2278 case LCP_OPT_MAGIC: 2279 /* Magic number -- extract. */ 2280 nmagic = (u_long)p[2] << 24 | 2281 (u_long)p[3] << 16 | p[4] << 8 | p[5]; 2282 if (nmagic != sp->lcp.magic) { 2283 if (debug) 2284 addlog(" 0x%lx", nmagic); 2285 continue; 2286 } 2287 /* 2288 * Local and remote magics equal -- loopback? 2289 */ 2290 if (sp->pp_loopcnt >= MAXALIVECNT*5) { 2291 printf (SPP_FMT "loopback\n", 2292 SPP_ARGS(ifp)); 2293 sp->pp_loopcnt = 0; 2294 if (ifp->if_flags & IFF_UP) { 2295 if_down(ifp); 2296 IFQ_PURGE(&sp->pp_cpq); 2297 /* XXX ? */ 2298 lcp.Down(sp); 2299 lcp.Up(sp); 2300 } 2301 } else if (debug) 2302 addlog(" [glitch]"); 2303 ++sp->pp_loopcnt; 2304 /* 2305 * We negate our magic here, and NAK it. If 2306 * we see it later in an NAK packet, we 2307 * suggest a new one. 2308 */ 2309 nmagic = ~sp->lcp.magic; 2310 /* Gonna NAK it. */ 2311 p[2] = nmagic >> 24; 2312 p[3] = nmagic >> 16; 2313 p[4] = nmagic >> 8; 2314 p[5] = nmagic; 2315 break; 2316 2317 case LCP_OPT_ASYNC_MAP: 2318 /* Async control character map -- check to be zero. */ 2319 if (! p[2] && ! p[3] && ! p[4] && ! p[5]) { 2320 if (debug) 2321 addlog(" [empty]"); 2322 continue; 2323 } 2324 if (debug) 2325 addlog(" [non-empty]"); 2326 /* suggest a zero one */ 2327 p[2] = p[3] = p[4] = p[5] = 0; 2328 break; 2329 2330 case LCP_OPT_MRU: 2331 /* 2332 * Maximum receive unit. Always agreeable, 2333 * but ignored by now. 2334 */ 2335 sp->lcp.their_mru = p[2] * 256 + p[3]; 2336 if (debug) 2337 addlog(" %ld", sp->lcp.their_mru); 2338 continue; 2339 2340 case LCP_OPT_AUTH_PROTO: 2341 authproto = (p[2] << 8) + p[3]; 2342 if (sp->myauth.proto != authproto) { 2343 /* not agreed, nak */ 2344 if (debug) 2345 addlog(" [mine %s != his %s]", 2346 sppp_proto_name(sp->hisauth.proto), 2347 sppp_proto_name(authproto)); 2348 p[2] = sp->myauth.proto >> 8; 2349 p[3] = sp->myauth.proto; 2350 break; 2351 } 2352 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2353 if (debug) 2354 addlog(" [chap not MD5]"); 2355 p[4] = CHAP_MD5; 2356 break; 2357 } 2358 continue; 2359 } 2360 /* Add the option to nak'ed list. */ 2361 bcopy (p, r, p[1]); 2362 r += p[1]; 2363 rlen += p[1]; 2364 } 2365 if (rlen) { 2366 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2367 if (debug) 2368 addlog(" max_failure (%d) exceeded, " 2369 "send conf-rej\n", 2370 sp->lcp.max_failure); 2371 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2372 } else { 2373 if (debug) 2374 addlog(" send conf-nak\n"); 2375 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2376 } 2377 goto end; 2378 } else { 2379 if (debug) 2380 addlog(" send conf-ack\n"); 2381 sp->fail_counter[IDX_LCP] = 0; 2382 sp->pp_loopcnt = 0; 2383 sppp_cp_send (sp, PPP_LCP, CONF_ACK, 2384 h->ident, origlen, h+1); 2385 } 2386 2387 end: 2388 free (buf, M_TEMP); 2389 return (rlen == 0); 2390 } 2391 2392 /* 2393 * Analyze the LCP Configure-Reject option list, and adjust our 2394 * negotiation. 2395 */ 2396 static void 2397 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2398 { 2399 STDDCL; 2400 u_char *buf, *p; 2401 2402 len -= 4; 2403 buf = malloc (len, M_TEMP, M_NOWAIT); 2404 if (!buf) 2405 return; 2406 2407 if (debug) 2408 log(LOG_DEBUG, SPP_FMT "lcp rej opts:", 2409 SPP_ARGS(ifp)); 2410 2411 p = (void*) (h+1); 2412 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2413 if (debug) 2414 addlog(" %s", sppp_lcp_opt_name(*p)); 2415 switch (*p) { 2416 case LCP_OPT_MAGIC: 2417 /* Magic number -- can't use it, use 0 */ 2418 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2419 sp->lcp.magic = 0; 2420 break; 2421 case LCP_OPT_MRU: 2422 /* 2423 * Should not be rejected anyway, since we only 2424 * negotiate a MRU if explicitly requested by 2425 * peer. 2426 */ 2427 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2428 break; 2429 case LCP_OPT_AUTH_PROTO: 2430 /* 2431 * Peer doesn't want to authenticate himself, 2432 * deny unless this is a dialout call, and 2433 * AUTHFLAG_NOCALLOUT is set. 2434 */ 2435 if ((sp->pp_flags & PP_CALLIN) == 0 && 2436 (sp->hisauth.flags & AUTHFLAG_NOCALLOUT) != 0) { 2437 if (debug) 2438 addlog(" [don't insist on auth " 2439 "for callout]"); 2440 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2441 break; 2442 } 2443 if (debug) 2444 addlog("[access denied]\n"); 2445 lcp.Close(sp); 2446 break; 2447 } 2448 } 2449 if (debug) 2450 addlog("\n"); 2451 free (buf, M_TEMP); 2452 return; 2453 } 2454 2455 /* 2456 * Analyze the LCP Configure-NAK option list, and adjust our 2457 * negotiation. 2458 */ 2459 static void 2460 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2461 { 2462 STDDCL; 2463 u_char *buf, *p; 2464 u_long magic; 2465 2466 len -= 4; 2467 buf = malloc (len, M_TEMP, M_NOWAIT); 2468 if (!buf) 2469 return; 2470 2471 if (debug) 2472 log(LOG_DEBUG, SPP_FMT "lcp nak opts:", 2473 SPP_ARGS(ifp)); 2474 2475 p = (void*) (h+1); 2476 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2477 if (debug) 2478 addlog(" %s", sppp_lcp_opt_name(*p)); 2479 switch (*p) { 2480 case LCP_OPT_MAGIC: 2481 /* Magic number -- renegotiate */ 2482 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2483 len >= 6 && p[1] == 6) { 2484 magic = (u_long)p[2] << 24 | 2485 (u_long)p[3] << 16 | p[4] << 8 | p[5]; 2486 /* 2487 * If the remote magic is our negated one, 2488 * this looks like a loopback problem. 2489 * Suggest a new magic to make sure. 2490 */ 2491 if (magic == ~sp->lcp.magic) { 2492 if (debug) 2493 addlog(" magic glitch"); 2494 #if defined(__NetBSD__) || (defined(__FreeBSD__) && __FreeBSD__ >= 3) 2495 sp->lcp.magic = random(); 2496 #else 2497 sp->lcp.magic = time.tv_sec + time.tv_usec; 2498 #endif 2499 } else { 2500 sp->lcp.magic = magic; 2501 if (debug) 2502 addlog(" %ld", magic); 2503 } 2504 } 2505 break; 2506 case LCP_OPT_MRU: 2507 /* 2508 * Peer wants to advise us to negotiate an MRU. 2509 * Agree on it if it's reasonable, or use 2510 * default otherwise. 2511 */ 2512 if (len >= 4 && p[1] == 4) { 2513 u_int mru = p[2] * 256 + p[3]; 2514 if (debug) 2515 addlog(" %d", mru); 2516 if (mru < PP_MTU || mru > PP_MAX_MRU) 2517 mru = PP_MTU; 2518 sp->lcp.mru = mru; 2519 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2520 } 2521 break; 2522 case LCP_OPT_AUTH_PROTO: 2523 /* 2524 * Peer doesn't like our authentication method, 2525 * deny. 2526 */ 2527 if (debug) 2528 addlog("[access denied]\n"); 2529 lcp.Close(sp); 2530 break; 2531 } 2532 } 2533 if (debug) 2534 addlog("\n"); 2535 free (buf, M_TEMP); 2536 return; 2537 } 2538 2539 static void 2540 sppp_lcp_tlu(struct sppp *sp) 2541 { 2542 STDDCL; 2543 int i; 2544 u_long mask; 2545 2546 /* XXX ? */ 2547 if (! (ifp->if_flags & IFF_UP) && 2548 (ifp->if_flags & IFF_RUNNING)) { 2549 /* Coming out of loopback mode. */ 2550 if_up(ifp); 2551 printf (SPP_FMT "up\n", SPP_ARGS(ifp)); 2552 } 2553 2554 for (i = 0; i < IDX_COUNT; i++) 2555 if ((cps[i])->flags & CP_QUAL) 2556 (cps[i])->Open(sp); 2557 2558 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2559 (sp->pp_flags & PP_NEEDAUTH) != 0) 2560 sp->pp_phase = PHASE_AUTHENTICATE; 2561 else 2562 sp->pp_phase = PHASE_NETWORK; 2563 2564 if(debug) 2565 { 2566 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2567 sppp_phase_name(sp->pp_phase)); 2568 } 2569 2570 /* 2571 * Open all authentication protocols. This is even required 2572 * if we already proceeded to network phase, since it might be 2573 * that remote wants us to authenticate, so we might have to 2574 * send a PAP request. Undesired authentication protocols 2575 * don't do anything when they get an Open event. 2576 */ 2577 for (i = 0; i < IDX_COUNT; i++) 2578 if ((cps[i])->flags & CP_AUTH) 2579 (cps[i])->Open(sp); 2580 2581 if (sp->pp_phase == PHASE_NETWORK) { 2582 /* Notify all NCPs. */ 2583 for (i = 0; i < IDX_COUNT; i++) 2584 if ((cps[i])->flags & CP_NCP) 2585 (cps[i])->Open(sp); 2586 } 2587 2588 /* Send Up events to all started protos. */ 2589 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2590 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) 2591 (cps[i])->Up(sp); 2592 2593 /* notify low-level driver of state change */ 2594 if (sp->pp_chg) 2595 sp->pp_chg(sp, (int)sp->pp_phase); 2596 2597 if (sp->pp_phase == PHASE_NETWORK) 2598 /* if no NCP is starting, close down */ 2599 sppp_lcp_check_and_close(sp); 2600 } 2601 2602 static void 2603 sppp_lcp_tld(struct sppp *sp) 2604 { 2605 STDDCL; 2606 int i; 2607 u_long mask; 2608 2609 sp->pp_phase = PHASE_TERMINATE; 2610 2611 if(debug) 2612 { 2613 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2614 sppp_phase_name(sp->pp_phase)); 2615 } 2616 2617 /* 2618 * Take upper layers down. We send the Down event first and 2619 * the Close second to prevent the upper layers from sending 2620 * ``a flurry of terminate-request packets'', as the RFC 2621 * describes it. 2622 */ 2623 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2624 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2625 (cps[i])->Down(sp); 2626 (cps[i])->Close(sp); 2627 } 2628 } 2629 2630 static void 2631 sppp_lcp_tls(struct sppp *sp) 2632 { 2633 STDDCL; 2634 2635 sp->pp_phase = PHASE_ESTABLISH; 2636 2637 if(debug) 2638 { 2639 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2640 sppp_phase_name(sp->pp_phase)); 2641 } 2642 2643 /* Notify lower layer if desired. */ 2644 if (sp->pp_tls) 2645 (sp->pp_tls)(sp); 2646 } 2647 2648 static void 2649 sppp_lcp_tlf(struct sppp *sp) 2650 { 2651 STDDCL; 2652 2653 sp->pp_phase = PHASE_DEAD; 2654 2655 if(debug) 2656 { 2657 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2658 sppp_phase_name(sp->pp_phase)); 2659 } 2660 2661 /* Notify lower layer if desired. */ 2662 if (sp->pp_tlf) 2663 (sp->pp_tlf)(sp); 2664 } 2665 2666 static void 2667 sppp_lcp_scr(struct sppp *sp) 2668 { 2669 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2670 int i = 0; 2671 u_short authproto; 2672 2673 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2674 if (! sp->lcp.magic) 2675 #if defined(__NetBSD__) || (defined(__FreeBSD__) && __FreeBSD__ >= 3) 2676 sp->lcp.magic = random(); 2677 #else 2678 sp->lcp.magic = time.tv_sec + time.tv_usec; 2679 #endif 2680 opt[i++] = LCP_OPT_MAGIC; 2681 opt[i++] = 6; 2682 opt[i++] = sp->lcp.magic >> 24; 2683 opt[i++] = sp->lcp.magic >> 16; 2684 opt[i++] = sp->lcp.magic >> 8; 2685 opt[i++] = sp->lcp.magic; 2686 } 2687 2688 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2689 opt[i++] = LCP_OPT_MRU; 2690 opt[i++] = 4; 2691 opt[i++] = sp->lcp.mru >> 8; 2692 opt[i++] = sp->lcp.mru; 2693 } 2694 2695 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2696 authproto = sp->hisauth.proto; 2697 opt[i++] = LCP_OPT_AUTH_PROTO; 2698 opt[i++] = authproto == PPP_CHAP? 5: 4; 2699 opt[i++] = authproto >> 8; 2700 opt[i++] = authproto; 2701 if (authproto == PPP_CHAP) 2702 opt[i++] = CHAP_MD5; 2703 } 2704 2705 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2706 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2707 } 2708 2709 /* 2710 * Check the open NCPs, return true if at least one NCP is open. 2711 */ 2712 static int 2713 sppp_ncp_check(struct sppp *sp) 2714 { 2715 int i, mask; 2716 2717 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2718 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2719 return 1; 2720 return 0; 2721 } 2722 2723 /* 2724 * Re-check the open NCPs and see if we should terminate the link. 2725 * Called by the NCPs during their tlf action handling. 2726 */ 2727 static void 2728 sppp_lcp_check_and_close(struct sppp *sp) 2729 { 2730 2731 if (sp->pp_phase < PHASE_NETWORK) 2732 /* don't bother, we are already going down */ 2733 return; 2734 2735 if (sppp_ncp_check(sp)) 2736 return; 2737 2738 lcp.Close(sp); 2739 } 2740 2741 2742 /* 2744 *--------------------------------------------------------------------------* 2745 * * 2746 * The IPCP implementation. * 2747 * * 2748 *--------------------------------------------------------------------------* 2749 */ 2750 2751 static void 2752 sppp_ipcp_init(struct sppp *sp) 2753 { 2754 sp->ipcp.opts = 0; 2755 sp->ipcp.flags = 0; 2756 sp->state[IDX_IPCP] = STATE_INITIAL; 2757 sp->fail_counter[IDX_IPCP] = 0; 2758 sp->pp_seq[IDX_IPCP] = 0; 2759 sp->pp_rseq[IDX_IPCP] = 0; 2760 #if defined(__NetBSD__) 2761 callout_init(&sp->ch[IDX_IPCP]); 2762 #endif 2763 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 2764 callout_handle_init(&sp->ch[IDX_IPCP]); 2765 #endif 2766 } 2767 2768 static void 2769 sppp_ipcp_up(struct sppp *sp) 2770 { 2771 sppp_up_event(&ipcp, sp); 2772 } 2773 2774 static void 2775 sppp_ipcp_down(struct sppp *sp) 2776 { 2777 sppp_down_event(&ipcp, sp); 2778 } 2779 2780 static void 2781 sppp_ipcp_open(struct sppp *sp) 2782 { 2783 STDDCL; 2784 u_long myaddr, hisaddr; 2785 2786 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN); 2787 2788 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 2789 /* 2790 * If we don't have his address, this probably means our 2791 * interface doesn't want to talk IP at all. (This could 2792 * be the case if somebody wants to speak only IPX, for 2793 * example.) Don't open IPCP in this case. 2794 */ 2795 if (hisaddr == 0L) { 2796 /* XXX this message should go away */ 2797 if (debug) 2798 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n", 2799 SPP_ARGS(ifp)); 2800 return; 2801 } 2802 2803 if (myaddr == 0L) { 2804 /* 2805 * I don't have an assigned address, so i need to 2806 * negotiate my address. 2807 */ 2808 sp->ipcp.flags |= IPCP_MYADDR_DYN; 2809 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2810 } else 2811 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 2812 sppp_open_event(&ipcp, sp); 2813 } 2814 2815 static void 2816 sppp_ipcp_close(struct sppp *sp) 2817 { 2818 sppp_close_event(&ipcp, sp); 2819 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 2820 /* 2821 * My address was dynamic, clear it again. 2822 */ 2823 sppp_set_ip_addr(sp, 0L); 2824 } 2825 2826 static void 2827 sppp_ipcp_TO(void *cookie) 2828 { 2829 sppp_to_event(&ipcp, (struct sppp *)cookie); 2830 } 2831 2832 /* 2833 * Analyze a configure request. Return true if it was agreeable, and 2834 * caused action sca, false if it has been rejected or nak'ed, and 2835 * caused action scn. (The return value is used to make the state 2836 * transition decision in the state automaton.) 2837 */ 2838 static int 2839 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2840 { 2841 u_char *buf, *r, *p; 2842 struct ifnet *ifp = &sp->pp_if; 2843 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 2844 u_long hisaddr, desiredaddr; 2845 int gotmyaddr = 0; 2846 2847 len -= 4; 2848 origlen = len; 2849 /* 2850 * Make sure to allocate a buf that can at least hold a 2851 * conf-nak with an `address' option. We might need it below. 2852 */ 2853 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 2854 if (! buf) 2855 return (0); 2856 2857 /* pass 1: see if we can recognize them */ 2858 if (debug) 2859 log(LOG_DEBUG, SPP_FMT "ipcp parse opts:", 2860 SPP_ARGS(ifp)); 2861 p = (void*) (h+1); 2862 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2863 if (debug) 2864 addlog(" %s", sppp_ipcp_opt_name(*p)); 2865 switch (*p) { 2866 #ifdef notyet 2867 case IPCP_OPT_COMPRESSION: 2868 if (len >= 6 && p[1] >= 6) { 2869 /* correctly formed compress option */ 2870 continue; 2871 } 2872 if (debug) 2873 addlog(" [invalid]"); 2874 break; 2875 #endif 2876 case IPCP_OPT_ADDRESS: 2877 if (len >= 6 && p[1] == 6) { 2878 /* correctly formed address option */ 2879 continue; 2880 } 2881 if (debug) 2882 addlog(" [invalid]"); 2883 break; 2884 default: 2885 /* Others not supported. */ 2886 if (debug) 2887 addlog(" [rej]"); 2888 break; 2889 } 2890 /* Add the option to rejected list. */ 2891 bcopy (p, r, p[1]); 2892 r += p[1]; 2893 rlen += p[1]; 2894 } 2895 if (rlen) { 2896 if (debug) 2897 addlog(" send conf-rej\n"); 2898 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 2899 goto end; 2900 } else if (debug) 2901 addlog("\n"); 2902 2903 /* pass 2: parse option values */ 2904 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); 2905 if (debug) 2906 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ", 2907 SPP_ARGS(ifp)); 2908 p = (void*) (h+1); 2909 len = origlen; 2910 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2911 if (debug) 2912 addlog(" %s", sppp_ipcp_opt_name(*p)); 2913 switch (*p) { 2914 #ifdef notyet 2915 case IPCP_OPT_COMPRESSION: 2916 continue; 2917 #endif 2918 case IPCP_OPT_ADDRESS: 2919 desiredaddr = p[2] << 24 | p[3] << 16 | 2920 p[4] << 8 | p[5]; 2921 if (!(sp->ipcp.flags & IPCP_MYADDR_SEEN) && 2922 (sp->ipcp.flags & IPCP_MYADDR_DYN)) { 2923 /* 2924 * hopefully this is our address !! 2925 */ 2926 if (debug) 2927 addlog(" [wantmyaddr %s]", 2928 sppp_dotted_quad(desiredaddr)); 2929 /* 2930 * When doing dynamic address assignment, 2931 * we accept his offer. Otherwise, we 2932 * ignore it and thus continue to negotiate 2933 * our already existing value. 2934 */ 2935 sppp_set_ip_addr(sp, desiredaddr); 2936 if (debug) 2937 addlog(" [agree]"); 2938 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 2939 gotmyaddr++; 2940 continue; 2941 } else { 2942 if (desiredaddr == hisaddr || 2943 (hisaddr == 1 && desiredaddr != 0)) { 2944 /* 2945 * Peer's address is same as our value, 2946 * this is agreeable. Gonna conf-ack 2947 * it. 2948 */ 2949 if (debug) 2950 addlog(" %s [ack]", 2951 sppp_dotted_quad(hisaddr)); 2952 /* record that we've seen it already */ 2953 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 2954 continue; 2955 } 2956 /* 2957 * The address wasn't agreeable. This is either 2958 * he sent us 0.0.0.0, asking to assign him an 2959 * address, or he send us another address not 2960 * matching our value. Either case, we gonna 2961 * conf-nak it with our value. 2962 */ 2963 if (debug) { 2964 if (desiredaddr == 0) 2965 addlog(" [addr requested]"); 2966 else 2967 addlog(" %s [not agreed]", 2968 sppp_dotted_quad(desiredaddr)); 2969 } 2970 2971 p[2] = hisaddr >> 24; 2972 p[3] = hisaddr >> 16; 2973 p[4] = hisaddr >> 8; 2974 p[5] = hisaddr; 2975 break; 2976 } 2977 } 2978 /* Add the option to nak'ed list. */ 2979 bcopy (p, r, p[1]); 2980 r += p[1]; 2981 rlen += p[1]; 2982 } 2983 2984 /* 2985 * If we are about to conf-ack the request, but haven't seen 2986 * his address so far, gonna conf-nak it instead, with the 2987 * `address' option present and our idea of his address being 2988 * filled in there, to request negotiation of both addresses. 2989 * 2990 * XXX This can result in an endless req - nak loop if peer 2991 * doesn't want to send us his address. Q: What should we do 2992 * about it? XXX A: implement the max-failure counter. 2993 */ 2994 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN) && !gotmyaddr) { 2995 buf[0] = IPCP_OPT_ADDRESS; 2996 buf[1] = 6; 2997 buf[2] = hisaddr >> 24; 2998 buf[3] = hisaddr >> 16; 2999 buf[4] = hisaddr >> 8; 3000 buf[5] = hisaddr; 3001 rlen = 6; 3002 if (debug) 3003 addlog(" still need hisaddr"); 3004 } 3005 3006 if (rlen) { 3007 if (debug) 3008 addlog(" send conf-nak\n"); 3009 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 3010 } else { 3011 if (debug) 3012 addlog(" send conf-ack\n"); 3013 sppp_cp_send (sp, PPP_IPCP, CONF_ACK, 3014 h->ident, origlen, h+1); 3015 } 3016 3017 end: 3018 free (buf, M_TEMP); 3019 return (rlen == 0); 3020 } 3021 3022 /* 3023 * Analyze the IPCP Configure-Reject option list, and adjust our 3024 * negotiation. 3025 */ 3026 static void 3027 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3028 { 3029 u_char *buf, *p; 3030 struct ifnet *ifp = &sp->pp_if; 3031 int debug = ifp->if_flags & IFF_DEBUG; 3032 3033 len -= 4; 3034 buf = malloc (len, M_TEMP, M_NOWAIT); 3035 if (!buf) 3036 return; 3037 3038 if (debug) 3039 log(LOG_DEBUG, SPP_FMT "ipcp rej opts:", 3040 SPP_ARGS(ifp)); 3041 3042 p = (void*) (h+1); 3043 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3044 if (debug) 3045 addlog(" %s", sppp_ipcp_opt_name(*p)); 3046 switch (*p) { 3047 case IPCP_OPT_ADDRESS: 3048 /* 3049 * Peer doesn't grok address option. This is 3050 * bad. XXX Should we better give up here? 3051 */ 3052 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 3053 break; 3054 #ifdef notyet 3055 case IPCP_OPT_COMPRESS: 3056 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 3057 break; 3058 #endif 3059 } 3060 } 3061 if (debug) 3062 addlog("\n"); 3063 free (buf, M_TEMP); 3064 return; 3065 } 3066 3067 /* 3068 * Analyze the IPCP Configure-NAK option list, and adjust our 3069 * negotiation. 3070 */ 3071 static void 3072 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3073 { 3074 u_char *buf, *p; 3075 struct ifnet *ifp = &sp->pp_if; 3076 int debug = ifp->if_flags & IFF_DEBUG; 3077 u_long wantaddr; 3078 3079 len -= 4; 3080 buf = malloc (len, M_TEMP, M_NOWAIT); 3081 if (!buf) 3082 return; 3083 3084 if (debug) 3085 log(LOG_DEBUG, SPP_FMT "ipcp nak opts:", 3086 SPP_ARGS(ifp)); 3087 3088 p = (void*) (h+1); 3089 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3090 if (debug) 3091 addlog(" %s", sppp_ipcp_opt_name(*p)); 3092 switch (*p) { 3093 case IPCP_OPT_ADDRESS: 3094 /* 3095 * Peer doesn't like our local IP address. See 3096 * if we can do something for him. We'll drop 3097 * him our address then. 3098 */ 3099 if (len >= 6 && p[1] == 6) { 3100 wantaddr = p[2] << 24 | p[3] << 16 | 3101 p[4] << 8 | p[5]; 3102 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3103 if (debug) 3104 addlog(" [wantaddr %s]", 3105 sppp_dotted_quad(wantaddr)); 3106 /* 3107 * When doing dynamic address assignment, 3108 * we accept his offer. Otherwise, we 3109 * ignore it and thus continue to negotiate 3110 * our already existing value. 3111 */ 3112 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3113 sppp_set_ip_addr(sp, wantaddr); 3114 if (debug) 3115 addlog(" [agree]"); 3116 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3117 } 3118 } 3119 break; 3120 #ifdef notyet 3121 case IPCP_OPT_COMPRESS: 3122 /* 3123 * Peer wants different compression parameters. 3124 */ 3125 break; 3126 #endif 3127 } 3128 } 3129 if (debug) 3130 addlog("\n"); 3131 free (buf, M_TEMP); 3132 return; 3133 } 3134 3135 static void 3136 sppp_ipcp_tlu(struct sppp *sp) 3137 { 3138 /* we are up - notify isdn daemon */ 3139 if (sp->pp_con) 3140 sp->pp_con(sp); 3141 } 3142 3143 static void 3144 sppp_ipcp_tld(struct sppp *sp) 3145 { 3146 } 3147 3148 static void 3149 sppp_ipcp_tls(struct sppp *sp) 3150 { 3151 /* indicate to LCP that it must stay alive */ 3152 sp->lcp.protos |= (1 << IDX_IPCP); 3153 } 3154 3155 static void 3156 sppp_ipcp_tlf(struct sppp *sp) 3157 { 3158 /* we no longer need LCP */ 3159 sp->lcp.protos &= ~(1 << IDX_IPCP); 3160 } 3161 3162 static void 3163 sppp_ipcp_scr(struct sppp *sp) 3164 { 3165 char opt[6 /* compression */ + 6 /* address */]; 3166 u_long ouraddr; 3167 int i = 0; 3168 3169 #ifdef notyet 3170 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3171 opt[i++] = IPCP_OPT_COMPRESSION; 3172 opt[i++] = 6; 3173 opt[i++] = 0; /* VJ header compression */ 3174 opt[i++] = 0x2d; /* VJ header compression */ 3175 opt[i++] = max_slot_id; 3176 opt[i++] = comp_slot_id; 3177 } 3178 #endif 3179 3180 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3181 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3182 opt[i++] = IPCP_OPT_ADDRESS; 3183 opt[i++] = 6; 3184 opt[i++] = ouraddr >> 24; 3185 opt[i++] = ouraddr >> 16; 3186 opt[i++] = ouraddr >> 8; 3187 opt[i++] = ouraddr; 3188 } 3189 3190 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3191 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3192 } 3193 3194 3195 /* 3197 *--------------------------------------------------------------------------* 3198 * * 3199 * The IPv6CP implementation. * 3200 * * 3201 *--------------------------------------------------------------------------* 3202 */ 3203 3204 #ifdef INET6 3205 static void 3206 sppp_ipv6cp_init(struct sppp *sp) 3207 { 3208 sp->ipv6cp.opts = 0; 3209 sp->ipv6cp.flags = 0; 3210 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3211 sp->fail_counter[IDX_IPV6CP] = 0; 3212 sp->pp_seq[IDX_IPV6CP] = 0; 3213 sp->pp_rseq[IDX_IPV6CP] = 0; 3214 #if defined(__NetBSD__) 3215 callout_init(&sp->ch[IDX_IPV6CP]); 3216 #endif 3217 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 3218 callout_handle_init(&sp->ch[IDX_IPV6CP]); 3219 #endif 3220 } 3221 3222 static void 3223 sppp_ipv6cp_up(struct sppp *sp) 3224 { 3225 sppp_up_event(&ipv6cp, sp); 3226 } 3227 3228 static void 3229 sppp_ipv6cp_down(struct sppp *sp) 3230 { 3231 sppp_down_event(&ipv6cp, sp); 3232 } 3233 3234 static void 3235 sppp_ipv6cp_open(struct sppp *sp) 3236 { 3237 STDDCL; 3238 struct in6_addr myaddr, hisaddr; 3239 3240 #ifdef IPV6CP_MYIFID_DYN 3241 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3242 #else 3243 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3244 #endif 3245 3246 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3247 /* 3248 * If we don't have our address, this probably means our 3249 * interface doesn't want to talk IPv6 at all. (This could 3250 * be the case if somebody wants to speak only IPX, for 3251 * example.) Don't open IPv6CP in this case. 3252 */ 3253 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3254 /* XXX this message should go away */ 3255 if (debug) 3256 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n", 3257 SPP_ARGS(ifp)); 3258 return; 3259 } 3260 3261 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3262 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3263 sppp_open_event(&ipv6cp, sp); 3264 } 3265 3266 static void 3267 sppp_ipv6cp_close(struct sppp *sp) 3268 { 3269 sppp_close_event(&ipv6cp, sp); 3270 } 3271 3272 static void 3273 sppp_ipv6cp_TO(void *cookie) 3274 { 3275 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3276 } 3277 3278 /* 3279 * Analyze a configure request. Return true if it was agreeable, and 3280 * caused action sca, false if it has been rejected or nak'ed, and 3281 * caused action scn. (The return value is used to make the state 3282 * transition decision in the state automaton.) 3283 */ 3284 static int 3285 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3286 { 3287 u_char *buf, *r, *p; 3288 struct ifnet *ifp = &sp->pp_if; 3289 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3290 struct in6_addr myaddr, desiredaddr, suggestaddr; 3291 int ifidcount; 3292 int type; 3293 int collision, nohisaddr; 3294 3295 len -= 4; 3296 origlen = len; 3297 /* 3298 * Make sure to allocate a buf that can at least hold a 3299 * conf-nak with an `address' option. We might need it below. 3300 */ 3301 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 3302 if (! buf) 3303 return (0); 3304 3305 /* pass 1: see if we can recognize them */ 3306 if (debug) 3307 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:", 3308 SPP_ARGS(ifp)); 3309 p = (void*) (h+1); 3310 ifidcount = 0; 3311 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3312 if (debug) 3313 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3314 switch (*p) { 3315 case IPV6CP_OPT_IFID: 3316 if (len >= 10 && p[1] == 10 && ifidcount == 0) { 3317 /* correctly formed address option */ 3318 ifidcount++; 3319 continue; 3320 } 3321 if (debug) 3322 addlog(" [invalid]"); 3323 break; 3324 #ifdef notyet 3325 case IPV6CP_OPT_COMPRESSION: 3326 if (len >= 4 && p[1] >= 4) { 3327 /* correctly formed compress option */ 3328 continue; 3329 } 3330 if (debug) 3331 addlog(" [invalid]"); 3332 break; 3333 #endif 3334 default: 3335 /* Others not supported. */ 3336 if (debug) 3337 addlog(" [rej]"); 3338 break; 3339 } 3340 /* Add the option to rejected list. */ 3341 bcopy (p, r, p[1]); 3342 r += p[1]; 3343 rlen += p[1]; 3344 } 3345 if (rlen) { 3346 if (debug) 3347 addlog(" send conf-rej\n"); 3348 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3349 goto end; 3350 } else if (debug) 3351 addlog("\n"); 3352 3353 /* pass 2: parse option values */ 3354 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3355 if (debug) 3356 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ", 3357 SPP_ARGS(ifp)); 3358 p = (void*) (h+1); 3359 len = origlen; 3360 type = CONF_ACK; 3361 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3362 if (debug) 3363 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3364 switch (*p) { 3365 #ifdef notyet 3366 case IPV6CP_OPT_COMPRESSION: 3367 continue; 3368 #endif 3369 case IPV6CP_OPT_IFID: 3370 bzero(&desiredaddr, sizeof(desiredaddr)); 3371 bcopy(&p[2], &desiredaddr.s6_addr[8], 8); 3372 collision = (bcmp(&desiredaddr.s6_addr[8], 3373 &myaddr.s6_addr[8], 8) == 0); 3374 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3375 3376 desiredaddr.s6_addr16[0] = htons(0xfe80); 3377 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3378 3379 if (!collision && !nohisaddr) { 3380 /* no collision, hisaddr known - Conf-Ack */ 3381 type = CONF_ACK; 3382 3383 if (debug) { 3384 addlog(" %s [%s]", 3385 ip6_sprintf(&desiredaddr), 3386 sppp_cp_type_name(type)); 3387 } 3388 continue; 3389 } 3390 3391 bzero(&suggestaddr, sizeof(&suggestaddr)); 3392 if (collision && nohisaddr) { 3393 /* collision, hisaddr unknown - Conf-Rej */ 3394 type = CONF_REJ; 3395 bzero(&p[2], 8); 3396 } else { 3397 /* 3398 * - no collision, hisaddr unknown, or 3399 * - collision, hisaddr known 3400 * Conf-Nak, suggest hisaddr 3401 */ 3402 type = CONF_NAK; 3403 sppp_suggest_ip6_addr(sp, &suggestaddr); 3404 bcopy(&suggestaddr.s6_addr[8], &p[2], 8); 3405 } 3406 if (debug) 3407 addlog(" %s [%s]", ip6_sprintf(&desiredaddr), 3408 sppp_cp_type_name(type)); 3409 break; 3410 } 3411 /* Add the option to nak'ed list. */ 3412 bcopy (p, r, p[1]); 3413 r += p[1]; 3414 rlen += p[1]; 3415 } 3416 3417 if (rlen == 0 && type == CONF_ACK) { 3418 if (debug) 3419 addlog(" send %s\n", sppp_cp_type_name(type)); 3420 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1); 3421 } else { 3422 #ifdef DIAGNOSTIC 3423 if (type == CONF_ACK) 3424 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3425 #endif 3426 3427 if (debug) { 3428 addlog(" send %s suggest %s\n", 3429 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); 3430 } 3431 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3432 } 3433 3434 end: 3435 free (buf, M_TEMP); 3436 return (rlen == 0); 3437 } 3438 3439 /* 3440 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3441 * negotiation. 3442 */ 3443 static void 3444 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3445 { 3446 u_char *buf, *p; 3447 struct ifnet *ifp = &sp->pp_if; 3448 int debug = ifp->if_flags & IFF_DEBUG; 3449 3450 len -= 4; 3451 buf = malloc (len, M_TEMP, M_NOWAIT); 3452 if (!buf) 3453 return; 3454 3455 if (debug) 3456 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:", 3457 SPP_ARGS(ifp)); 3458 3459 p = (void*) (h+1); 3460 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3461 if (debug) 3462 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3463 switch (*p) { 3464 case IPV6CP_OPT_IFID: 3465 /* 3466 * Peer doesn't grok address option. This is 3467 * bad. XXX Should we better give up here? 3468 */ 3469 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3470 break; 3471 #ifdef notyet 3472 case IPV6CP_OPT_COMPRESS: 3473 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3474 break; 3475 #endif 3476 } 3477 } 3478 if (debug) 3479 addlog("\n"); 3480 free (buf, M_TEMP); 3481 return; 3482 } 3483 3484 /* 3485 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3486 * negotiation. 3487 */ 3488 static void 3489 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3490 { 3491 u_char *buf, *p; 3492 struct ifnet *ifp = &sp->pp_if; 3493 int debug = ifp->if_flags & IFF_DEBUG; 3494 struct in6_addr suggestaddr; 3495 3496 len -= 4; 3497 buf = malloc (len, M_TEMP, M_NOWAIT); 3498 if (!buf) 3499 return; 3500 3501 if (debug) 3502 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:", 3503 SPP_ARGS(ifp)); 3504 3505 p = (void*) (h+1); 3506 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3507 if (debug) 3508 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3509 switch (*p) { 3510 case IPV6CP_OPT_IFID: 3511 /* 3512 * Peer doesn't like our local ifid. See 3513 * if we can do something for him. We'll drop 3514 * him our address then. 3515 */ 3516 if (len < 10 || p[1] != 10) 3517 break; 3518 bzero(&suggestaddr, sizeof(suggestaddr)); 3519 suggestaddr.s6_addr16[0] = htons(0xfe80); 3520 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3521 bcopy(&p[2], &suggestaddr.s6_addr[8], 8); 3522 3523 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3524 if (debug) 3525 addlog(" [suggestaddr %s]", 3526 ip6_sprintf(&suggestaddr)); 3527 #ifdef IPV6CP_MYIFID_DYN 3528 /* 3529 * When doing dynamic address assignment, 3530 * we accept his offer. 3531 */ 3532 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3533 struct in6_addr lastsuggest; 3534 /* 3535 * If <suggested myaddr from peer> equals to 3536 * <hisaddr we have suggested last time>, 3537 * we have a collision. generate new random 3538 * ifid. 3539 */ 3540 sppp_suggest_ip6_addr(&lastsuggest); 3541 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3542 lastsuggest)) { 3543 if (debug) 3544 addlog(" [random]"); 3545 sppp_gen_ip6_addr(sp, &suggestaddr); 3546 } 3547 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3548 if (debug) 3549 addlog(" [agree]"); 3550 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3551 } 3552 #else 3553 /* 3554 * Since we do not do dynamic address assignment, 3555 * we ignore it and thus continue to negotiate 3556 * our already existing value. This can possibly 3557 * go into infinite request-reject loop. 3558 * 3559 * This is not likely because we normally use 3560 * ifid based on MAC-address. 3561 * If you have no ethernet card on the node, too bad. 3562 * XXX should we use fail_counter? 3563 */ 3564 #endif 3565 break; 3566 #ifdef notyet 3567 case IPV6CP_OPT_COMPRESS: 3568 /* 3569 * Peer wants different compression parameters. 3570 */ 3571 break; 3572 #endif 3573 } 3574 } 3575 if (debug) 3576 addlog("\n"); 3577 free (buf, M_TEMP); 3578 return; 3579 } 3580 3581 static void 3582 sppp_ipv6cp_tlu(struct sppp *sp) 3583 { 3584 /* we are up - notify isdn daemon */ 3585 if (sp->pp_con) 3586 sp->pp_con(sp); 3587 } 3588 3589 static void 3590 sppp_ipv6cp_tld(struct sppp *sp) 3591 { 3592 } 3593 3594 static void 3595 sppp_ipv6cp_tls(struct sppp *sp) 3596 { 3597 /* indicate to LCP that it must stay alive */ 3598 sp->lcp.protos |= (1 << IDX_IPV6CP); 3599 } 3600 3601 static void 3602 sppp_ipv6cp_tlf(struct sppp *sp) 3603 { 3604 /* we no longer need LCP */ 3605 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3606 } 3607 3608 static void 3609 sppp_ipv6cp_scr(struct sppp *sp) 3610 { 3611 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3612 struct in6_addr ouraddr; 3613 int i = 0; 3614 3615 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3616 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3617 opt[i++] = IPV6CP_OPT_IFID; 3618 opt[i++] = 10; 3619 bcopy(&ouraddr.s6_addr[8], &opt[i], 8); 3620 i += 8; 3621 } 3622 3623 #ifdef notyet 3624 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3625 opt[i++] = IPV6CP_OPT_COMPRESSION; 3626 opt[i++] = 4; 3627 opt[i++] = 0; /* TBD */ 3628 opt[i++] = 0; /* TBD */ 3629 /* variable length data may follow */ 3630 } 3631 #endif 3632 3633 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3634 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 3635 } 3636 #else /*INET6*/ 3637 static void sppp_ipv6cp_init(struct sppp *sp) 3638 { 3639 } 3640 3641 static void sppp_ipv6cp_up(struct sppp *sp) 3642 { 3643 } 3644 3645 static void sppp_ipv6cp_down(struct sppp *sp) 3646 { 3647 } 3648 3649 3650 static void sppp_ipv6cp_open(struct sppp *sp) 3651 { 3652 } 3653 3654 static void sppp_ipv6cp_close(struct sppp *sp) 3655 { 3656 } 3657 3658 static void sppp_ipv6cp_TO(void *sp) 3659 { 3660 } 3661 3662 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3663 { 3664 return 0; 3665 } 3666 3667 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3668 { 3669 } 3670 3671 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3672 { 3673 } 3674 3675 static void sppp_ipv6cp_tlu(struct sppp *sp) 3676 { 3677 } 3678 3679 static void sppp_ipv6cp_tld(struct sppp *sp) 3680 { 3681 } 3682 3683 static void sppp_ipv6cp_tls(struct sppp *sp) 3684 { 3685 } 3686 3687 static void sppp_ipv6cp_tlf(struct sppp *sp) 3688 { 3689 } 3690 3691 static void sppp_ipv6cp_scr(struct sppp *sp) 3692 { 3693 } 3694 #endif /*INET6*/ 3695 3696 3697 /* 3699 *--------------------------------------------------------------------------* 3700 * * 3701 * The CHAP implementation. * 3702 * * 3703 *--------------------------------------------------------------------------* 3704 */ 3705 3706 /* 3707 * The authentication protocols don't employ a full-fledged state machine as 3708 * the control protocols do, since they do have Open and Close events, but 3709 * not Up and Down, nor are they explicitly terminated. Also, use of the 3710 * authentication protocols may be different in both directions (this makes 3711 * sense, think of a machine that never accepts incoming calls but only 3712 * calls out, it doesn't require the called party to authenticate itself). 3713 * 3714 * Our state machine for the local authentication protocol (we are requesting 3715 * the peer to authenticate) looks like: 3716 * 3717 * RCA- 3718 * +--------------------------------------------+ 3719 * V scn,tld| 3720 * +--------+ Close +---------+ RCA+ 3721 * | |<----------------------------------| |------+ 3722 * +--->| Closed | TO* | Opened | sca | 3723 * | | |-----+ +-------| |<-----+ 3724 * | +--------+ irc | | +---------+ 3725 * | ^ | | ^ 3726 * | | | | | 3727 * | | | | | 3728 * | TO-| | | | 3729 * | |tld TO+ V | | 3730 * | | +------->+ | | 3731 * | | | | | | 3732 * | +--------+ V | | 3733 * | | |<----+<--------------------+ | 3734 * | | Req- | scr | 3735 * | | Sent | | 3736 * | | | | 3737 * | +--------+ | 3738 * | RCA- | | RCA+ | 3739 * +------+ +------------------------------------------+ 3740 * scn,tld sca,irc,ict,tlu 3741 * 3742 * 3743 * with: 3744 * 3745 * Open: LCP reached authentication phase 3746 * Close: LCP reached terminate phase 3747 * 3748 * RCA+: received reply (pap-req, chap-response), acceptable 3749 * RCN: received reply (pap-req, chap-response), not acceptable 3750 * TO+: timeout with restart counter >= 0 3751 * TO-: timeout with restart counter < 0 3752 * TO*: reschedule timeout for CHAP 3753 * 3754 * scr: send request packet (none for PAP, chap-challenge) 3755 * sca: send ack packet (pap-ack, chap-success) 3756 * scn: send nak packet (pap-nak, chap-failure) 3757 * ict: initialize re-challenge timer (CHAP only) 3758 * 3759 * tlu: this-layer-up, LCP reaches network phase 3760 * tld: this-layer-down, LCP enters terminate phase 3761 * 3762 * Note that in CHAP mode, after sending a new challenge, while the state 3763 * automaton falls back into Req-Sent state, it doesn't signal a tld 3764 * event to LCP, so LCP remains in network phase. Only after not getting 3765 * any response (or after getting an unacceptable response), CHAP closes, 3766 * causing LCP to enter terminate phase. 3767 * 3768 * With PAP, there is no initial request that can be sent. The peer is 3769 * expected to send one based on the successful negotiation of PAP as 3770 * the authentication protocol during the LCP option negotiation. 3771 * 3772 * Incoming authentication protocol requests (remote requests 3773 * authentication, we are peer) don't employ a state machine at all, 3774 * they are simply answered. Some peers [Ascend P50 firmware rev 3775 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 3776 * still in authentication phase (thereby violating the standard that 3777 * demands that these NCP packets are to be discarded), so we keep 3778 * track of the peer demanding us to authenticate, and only proceed to 3779 * phase network once we've seen a positive acknowledge for the 3780 * authentication. 3781 */ 3782 3783 /* 3784 * Handle incoming CHAP packets. 3785 */ 3786 void 3787 sppp_chap_input(struct sppp *sp, struct mbuf *m) 3788 { 3789 STDDCL; 3790 struct lcp_header *h; 3791 int len, x; 3792 u_char *value, *name, digest[AUTHKEYLEN], dsize; 3793 int value_len, name_len; 3794 MD5_CTX ctx; 3795 3796 len = m->m_pkthdr.len; 3797 if (len < 4) { 3798 if (debug) 3799 log(LOG_DEBUG, 3800 SPP_FMT "chap invalid packet length: %d bytes\n", 3801 SPP_ARGS(ifp), len); 3802 return; 3803 } 3804 h = mtod (m, struct lcp_header*); 3805 if (len > ntohs (h->len)) 3806 len = ntohs (h->len); 3807 3808 switch (h->type) { 3809 /* challenge, failure and success are his authproto */ 3810 case CHAP_CHALLENGE: 3811 value = 1 + (u_char*)(h+1); 3812 value_len = value[-1]; 3813 name = value + value_len; 3814 name_len = len - value_len - 5; 3815 if (name_len < 0) { 3816 if (debug) { 3817 log(LOG_DEBUG, 3818 SPP_FMT "chap corrupted challenge " 3819 "<%s id=0x%x len=%d", 3820 SPP_ARGS(ifp), 3821 sppp_auth_type_name(PPP_CHAP, h->type), 3822 h->ident, ntohs(h->len)); 3823 if (len > 4) 3824 sppp_print_bytes((u_char*) (h+1), len-4); 3825 addlog(">\n"); 3826 } 3827 break; 3828 } 3829 3830 if (debug) { 3831 log(LOG_DEBUG, 3832 SPP_FMT "chap input <%s id=0x%x len=%d name=", 3833 SPP_ARGS(ifp), 3834 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 3835 ntohs(h->len)); 3836 sppp_print_string((char*) name, name_len); 3837 addlog(" value-size=%d value=", value_len); 3838 sppp_print_bytes(value, value_len); 3839 addlog(">\n"); 3840 } 3841 3842 /* Compute reply value. */ 3843 MD5Init(&ctx); 3844 MD5Update(&ctx, &h->ident, 1); 3845 MD5Update(&ctx, sp->myauth.secret, 3846 sppp_strnlen(sp->myauth.secret, AUTHKEYLEN)); 3847 MD5Update(&ctx, value, value_len); 3848 MD5Final(digest, &ctx); 3849 dsize = sizeof digest; 3850 3851 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 3852 sizeof dsize, (const char *)&dsize, 3853 sizeof digest, digest, 3854 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN), 3855 sp->myauth.name, 3856 0); 3857 break; 3858 3859 case CHAP_SUCCESS: 3860 if (debug) { 3861 log(LOG_DEBUG, SPP_FMT "chap success", 3862 SPP_ARGS(ifp)); 3863 if (len > 4) { 3864 addlog(": "); 3865 sppp_print_string((char*)(h + 1), len - 4); 3866 } 3867 addlog("\n"); 3868 } 3869 x = splnet(); 3870 sp->pp_flags &= ~PP_NEEDAUTH; 3871 if (sp->myauth.proto == PPP_CHAP && 3872 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 3873 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 3874 /* 3875 * We are authenticator for CHAP but didn't 3876 * complete yet. Leave it to tlu to proceed 3877 * to network phase. 3878 */ 3879 splx(x); 3880 break; 3881 } 3882 splx(x); 3883 sppp_phase_network(sp); 3884 break; 3885 3886 case CHAP_FAILURE: 3887 if (debug) { 3888 log(LOG_INFO, SPP_FMT "chap failure", 3889 SPP_ARGS(ifp)); 3890 if (len > 4) { 3891 addlog(": "); 3892 sppp_print_string((char*)(h + 1), len - 4); 3893 } 3894 addlog("\n"); 3895 } else 3896 log(LOG_INFO, SPP_FMT "chap failure\n", 3897 SPP_ARGS(ifp)); 3898 /* await LCP shutdown by authenticator */ 3899 break; 3900 3901 /* response is my authproto */ 3902 case CHAP_RESPONSE: 3903 value = 1 + (u_char*)(h+1); 3904 value_len = value[-1]; 3905 name = value + value_len; 3906 name_len = len - value_len - 5; 3907 if (name_len < 0) { 3908 if (debug) { 3909 log(LOG_DEBUG, 3910 SPP_FMT "chap corrupted response " 3911 "<%s id=0x%x len=%d", 3912 SPP_ARGS(ifp), 3913 sppp_auth_type_name(PPP_CHAP, h->type), 3914 h->ident, ntohs(h->len)); 3915 if (len > 4) 3916 sppp_print_bytes((u_char*)(h+1), len-4); 3917 addlog(">\n"); 3918 } 3919 break; 3920 } 3921 if (h->ident != sp->confid[IDX_CHAP]) { 3922 if (debug) 3923 log(LOG_DEBUG, 3924 SPP_FMT "chap dropping response for old ID " 3925 "(got %d, expected %d)\n", 3926 SPP_ARGS(ifp), 3927 h->ident, sp->confid[IDX_CHAP]); 3928 break; 3929 } 3930 if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN) 3931 || bcmp(name, sp->hisauth.name, name_len) != 0) { 3932 log(LOG_INFO, SPP_FMT "chap response, his name ", 3933 SPP_ARGS(ifp)); 3934 sppp_print_string(name, name_len); 3935 addlog(" != expected "); 3936 sppp_print_string(sp->hisauth.name, 3937 sppp_strnlen(sp->hisauth.name, AUTHNAMELEN)); 3938 addlog("\n"); 3939 } 3940 if (debug) { 3941 log(LOG_DEBUG, SPP_FMT "chap input(%s) " 3942 "<%s id=0x%x len=%d name=", 3943 SPP_ARGS(ifp), 3944 sppp_state_name(sp->state[IDX_CHAP]), 3945 sppp_auth_type_name(PPP_CHAP, h->type), 3946 h->ident, ntohs (h->len)); 3947 sppp_print_string((char*)name, name_len); 3948 addlog(" value-size=%d value=", value_len); 3949 sppp_print_bytes(value, value_len); 3950 addlog(">\n"); 3951 } 3952 if (value_len != AUTHKEYLEN) { 3953 if (debug) 3954 log(LOG_DEBUG, 3955 SPP_FMT "chap bad hash value length: " 3956 "%d bytes, should be %d\n", 3957 SPP_ARGS(ifp), value_len, 3958 AUTHKEYLEN); 3959 break; 3960 } 3961 3962 MD5Init(&ctx); 3963 MD5Update(&ctx, &h->ident, 1); 3964 MD5Update(&ctx, sp->hisauth.secret, 3965 sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN)); 3966 MD5Update(&ctx, sp->myauth.challenge, AUTHKEYLEN); 3967 MD5Final(digest, &ctx); 3968 3969 #define FAILMSG "Failed..." 3970 #define SUCCMSG "Welcome!" 3971 3972 if (value_len != sizeof digest || 3973 bcmp(digest, value, value_len) != 0) { 3974 /* action scn, tld */ 3975 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 3976 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 3977 0); 3978 chap.tld(sp); 3979 break; 3980 } 3981 /* action sca, perhaps tlu */ 3982 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 3983 sp->state[IDX_CHAP] == STATE_OPENED) 3984 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 3985 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 3986 0); 3987 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 3988 sppp_cp_change_state(&chap, sp, STATE_OPENED); 3989 chap.tlu(sp); 3990 } 3991 break; 3992 3993 default: 3994 /* Unknown CHAP packet type -- ignore. */ 3995 if (debug) { 3996 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) " 3997 "<0x%x id=0x%xh len=%d", 3998 SPP_ARGS(ifp), 3999 sppp_state_name(sp->state[IDX_CHAP]), 4000 h->type, h->ident, ntohs(h->len)); 4001 if (len > 4) 4002 sppp_print_bytes((u_char*)(h+1), len-4); 4003 addlog(">\n"); 4004 } 4005 break; 4006 4007 } 4008 } 4009 4010 static void 4011 sppp_chap_init(struct sppp *sp) 4012 { 4013 /* Chap doesn't have STATE_INITIAL at all. */ 4014 sp->state[IDX_CHAP] = STATE_CLOSED; 4015 sp->fail_counter[IDX_CHAP] = 0; 4016 sp->pp_seq[IDX_CHAP] = 0; 4017 sp->pp_rseq[IDX_CHAP] = 0; 4018 #if defined(__NetBSD__) 4019 callout_init(&sp->ch[IDX_CHAP]); 4020 #endif 4021 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4022 callout_handle_init(&sp->ch[IDX_CHAP]); 4023 #endif 4024 } 4025 4026 static void 4027 sppp_chap_open(struct sppp *sp) 4028 { 4029 if (sp->myauth.proto == PPP_CHAP && 4030 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4031 /* we are authenticator for CHAP, start it */ 4032 chap.scr(sp); 4033 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4034 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4035 } 4036 /* nothing to be done if we are peer, await a challenge */ 4037 } 4038 4039 static void 4040 sppp_chap_close(struct sppp *sp) 4041 { 4042 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4043 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4044 } 4045 4046 static void 4047 sppp_chap_TO(void *cookie) 4048 { 4049 struct sppp *sp = (struct sppp *)cookie; 4050 STDDCL; 4051 int s; 4052 4053 s = splnet(); 4054 if (debug) 4055 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n", 4056 SPP_ARGS(ifp), 4057 sppp_state_name(sp->state[IDX_CHAP]), 4058 sp->rst_counter[IDX_CHAP]); 4059 4060 if (--sp->rst_counter[IDX_CHAP] < 0) 4061 /* TO- event */ 4062 switch (sp->state[IDX_CHAP]) { 4063 case STATE_REQ_SENT: 4064 chap.tld(sp); 4065 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4066 break; 4067 } 4068 else 4069 /* TO+ (or TO*) event */ 4070 switch (sp->state[IDX_CHAP]) { 4071 case STATE_OPENED: 4072 /* TO* event */ 4073 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4074 /* fall through */ 4075 case STATE_REQ_SENT: 4076 chap.scr(sp); 4077 /* sppp_cp_change_state() will restart the timer */ 4078 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4079 break; 4080 } 4081 4082 splx(s); 4083 } 4084 4085 static void 4086 sppp_chap_tlu(struct sppp *sp) 4087 { 4088 STDDCL; 4089 int i, x; 4090 4091 i = 0; 4092 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4093 4094 /* 4095 * Some broken CHAP implementations (Conware CoNet, firmware 4096 * 4.0.?) don't want to re-authenticate their CHAP once the 4097 * initial challenge-response exchange has taken place. 4098 * Provide for an option to avoid rechallenges. 4099 */ 4100 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0) { 4101 /* 4102 * Compute the re-challenge timeout. This will yield 4103 * a number between 300 and 810 seconds. 4104 */ 4105 i = 300 + ((unsigned)(random() & 0xff00) >> 7); 4106 4107 #if defined(__NetBSD__) 4108 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4109 #else 4110 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4111 sp->ch[IDX_CHAP] = 4112 #endif 4113 timeout(chap.TO, (void *)sp, i * hz); 4114 #endif /* __NetBSD__ */ 4115 } 4116 4117 if (debug) { 4118 log(LOG_DEBUG, 4119 SPP_FMT "chap %s, ", 4120 SPP_ARGS(ifp), 4121 sp->pp_phase == PHASE_NETWORK? "reconfirmed": "tlu"); 4122 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0) 4123 addlog("next re-challenge in %d seconds\n", i); 4124 else 4125 addlog("re-challenging supressed\n"); 4126 } 4127 4128 x = splnet(); 4129 /* indicate to LCP that we need to be closed down */ 4130 sp->lcp.protos |= (1 << IDX_CHAP); 4131 4132 if (sp->pp_flags & PP_NEEDAUTH) { 4133 /* 4134 * Remote is authenticator, but his auth proto didn't 4135 * complete yet. Defer the transition to network 4136 * phase. 4137 */ 4138 splx(x); 4139 return; 4140 } 4141 splx(x); 4142 4143 /* 4144 * If we are already in phase network, we are done here. This 4145 * is the case if this is a dummy tlu event after a re-challenge. 4146 */ 4147 if (sp->pp_phase != PHASE_NETWORK) 4148 sppp_phase_network(sp); 4149 } 4150 4151 static void 4152 sppp_chap_tld(struct sppp *sp) 4153 { 4154 STDDCL; 4155 4156 if (debug) 4157 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp)); 4158 #if defined(__NetBSD__) 4159 callout_stop(&sp->ch[IDX_CHAP]); 4160 #else 4161 untimeout(chap.TO, (void *)sp 4162 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4163 , sp->ch[IDX_CHAP] 4164 #endif 4165 ); 4166 #endif /* __NetBSD__ */ 4167 sp->lcp.protos &= ~(1 << IDX_CHAP); 4168 4169 lcp.Close(sp); 4170 } 4171 4172 static void 4173 sppp_chap_scr(struct sppp *sp) 4174 { 4175 struct timeval tv; 4176 u_long *ch, seed; 4177 u_char clen; 4178 4179 /* Compute random challenge. */ 4180 ch = (u_long *)sp->myauth.challenge; 4181 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4182 read_random(&seed, sizeof seed); 4183 #else 4184 microtime(&tv); 4185 seed = tv.tv_sec ^ tv.tv_usec; 4186 #endif 4187 ch[0] = seed ^ random(); 4188 ch[1] = seed ^ random(); 4189 ch[2] = seed ^ random(); 4190 ch[3] = seed ^ random(); 4191 clen = AUTHKEYLEN; 4192 4193 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4194 4195 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4196 sizeof clen, (const char *)&clen, 4197 (size_t)AUTHKEYLEN, sp->myauth.challenge, 4198 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN), 4199 sp->myauth.name, 4200 0); 4201 } 4202 /* 4204 *--------------------------------------------------------------------------* 4205 * * 4206 * The PAP implementation. * 4207 * * 4208 *--------------------------------------------------------------------------* 4209 */ 4210 /* 4211 * For PAP, we need to keep a little state also if we are the peer, not the 4212 * authenticator. This is since we don't get a request to authenticate, but 4213 * have to repeatedly authenticate ourself until we got a response (or the 4214 * retry counter is expired). 4215 */ 4216 4217 /* 4218 * Handle incoming PAP packets. */ 4219 static void 4220 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4221 { 4222 STDDCL; 4223 struct lcp_header *h; 4224 int len, x; 4225 u_char *name, *passwd, mlen; 4226 int name_len, passwd_len; 4227 4228 len = m->m_pkthdr.len; 4229 if (len < 5) { 4230 if (debug) 4231 log(LOG_DEBUG, 4232 SPP_FMT "pap invalid packet length: %d bytes\n", 4233 SPP_ARGS(ifp), len); 4234 return; 4235 } 4236 h = mtod (m, struct lcp_header*); 4237 if (len > ntohs (h->len)) 4238 len = ntohs (h->len); 4239 switch (h->type) { 4240 /* PAP request is my authproto */ 4241 case PAP_REQ: 4242 name = 1 + (u_char*)(h+1); 4243 name_len = name[-1]; 4244 passwd = name + name_len + 1; 4245 if (name_len > len - 6 || 4246 (passwd_len = passwd[-1]) > len - 6 - name_len) { 4247 if (debug) { 4248 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4249 "<%s id=0x%x len=%d", 4250 SPP_ARGS(ifp), 4251 sppp_auth_type_name(PPP_PAP, h->type), 4252 h->ident, ntohs(h->len)); 4253 if (len > 4) 4254 sppp_print_bytes((u_char*)(h+1), len-4); 4255 addlog(">\n"); 4256 } 4257 break; 4258 } 4259 if (debug) { 4260 log(LOG_DEBUG, SPP_FMT "pap input(%s) " 4261 "<%s id=0x%x len=%d name=", 4262 SPP_ARGS(ifp), 4263 sppp_state_name(sp->state[IDX_PAP]), 4264 sppp_auth_type_name(PPP_PAP, h->type), 4265 h->ident, ntohs(h->len)); 4266 sppp_print_string((char*)name, name_len); 4267 addlog(" passwd="); 4268 sppp_print_string((char*)passwd, passwd_len); 4269 addlog(">\n"); 4270 } 4271 if (name_len > AUTHNAMELEN || 4272 passwd_len > AUTHKEYLEN || 4273 bcmp(name, sp->hisauth.name, name_len) != 0 || 4274 bcmp(passwd, sp->hisauth.secret, passwd_len) != 0) { 4275 /* action scn, tld */ 4276 mlen = sizeof(FAILMSG) - 1; 4277 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4278 sizeof mlen, (const char *)&mlen, 4279 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 4280 0); 4281 pap.tld(sp); 4282 break; 4283 } 4284 /* action sca, perhaps tlu */ 4285 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4286 sp->state[IDX_PAP] == STATE_OPENED) { 4287 mlen = sizeof(SUCCMSG) - 1; 4288 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4289 sizeof mlen, (const char *)&mlen, 4290 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 4291 0); 4292 } 4293 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4294 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4295 pap.tlu(sp); 4296 } 4297 break; 4298 4299 /* ack and nak are his authproto */ 4300 case PAP_ACK: 4301 #if defined(__NetBSD__) 4302 callout_stop(&sp->pap_my_to_ch); 4303 #else 4304 untimeout(sppp_pap_my_TO, (void *)sp 4305 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4306 , sp->pap_my_to_ch 4307 #endif 4308 ); 4309 #endif /* __NetBSD__ */ 4310 if (debug) { 4311 log(LOG_DEBUG, SPP_FMT "pap success", 4312 SPP_ARGS(ifp)); 4313 name_len = *((char *)h); 4314 if (len > 5 && name_len) { 4315 addlog(": "); 4316 sppp_print_string((char*)(h+1), name_len); 4317 } 4318 addlog("\n"); 4319 } 4320 x = splnet(); 4321 sp->pp_flags &= ~PP_NEEDAUTH; 4322 if (sp->myauth.proto == PPP_PAP && 4323 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4324 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4325 /* 4326 * We are authenticator for PAP but didn't 4327 * complete yet. Leave it to tlu to proceed 4328 * to network phase. 4329 */ 4330 splx(x); 4331 break; 4332 } 4333 splx(x); 4334 sppp_phase_network(sp); 4335 break; 4336 4337 case PAP_NAK: 4338 #if defined(__NetBSD__) 4339 callout_stop(&sp->pap_my_to_ch); 4340 #else 4341 untimeout(sppp_pap_my_TO, (void *)sp 4342 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4343 , sp->pap_my_to_ch 4344 #endif 4345 ); 4346 #endif /* __NetBSD__ */ 4347 if (debug) { 4348 log(LOG_INFO, SPP_FMT "pap failure", 4349 SPP_ARGS(ifp)); 4350 name_len = *((char *)h); 4351 if (len > 5 && name_len) { 4352 addlog(": "); 4353 sppp_print_string((char*)(h+1), name_len); 4354 } 4355 addlog("\n"); 4356 } else 4357 log(LOG_INFO, SPP_FMT "pap failure\n", 4358 SPP_ARGS(ifp)); 4359 /* await LCP shutdown by authenticator */ 4360 break; 4361 4362 default: 4363 /* Unknown PAP packet type -- ignore. */ 4364 if (debug) { 4365 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4366 "<0x%x id=0x%x len=%d", 4367 SPP_ARGS(ifp), 4368 h->type, h->ident, ntohs(h->len)); 4369 if (len > 4) 4370 sppp_print_bytes((u_char*)(h+1), len-4); 4371 addlog(">\n"); 4372 } 4373 break; 4374 4375 } 4376 } 4377 4378 static void 4379 sppp_pap_init(struct sppp *sp) 4380 { 4381 /* PAP doesn't have STATE_INITIAL at all. */ 4382 sp->state[IDX_PAP] = STATE_CLOSED; 4383 sp->fail_counter[IDX_PAP] = 0; 4384 sp->pp_seq[IDX_PAP] = 0; 4385 sp->pp_rseq[IDX_PAP] = 0; 4386 #if defined(__NetBSD__) 4387 callout_init(&sp->ch[IDX_PAP]); 4388 callout_init(&sp->pap_my_to_ch); 4389 #endif 4390 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4391 callout_handle_init(&sp->ch[IDX_PAP]); 4392 callout_handle_init(&sp->pap_my_to_ch); 4393 #endif 4394 } 4395 4396 static void 4397 sppp_pap_open(struct sppp *sp) 4398 { 4399 if (sp->hisauth.proto == PPP_PAP && 4400 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4401 /* we are authenticator for PAP, start our timer */ 4402 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4403 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4404 } 4405 if (sp->myauth.proto == PPP_PAP) { 4406 /* we are peer, send a request, and start a timer */ 4407 pap.scr(sp); 4408 #if defined(__NetBSD__) 4409 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4410 sppp_pap_my_TO, sp); 4411 #else 4412 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4413 sp->pap_my_to_ch = 4414 #endif 4415 timeout(sppp_pap_my_TO, (void *)sp, sp->lcp.timeout); 4416 #endif /* __NetBSD__ */ 4417 } 4418 } 4419 4420 static void 4421 sppp_pap_close(struct sppp *sp) 4422 { 4423 if (sp->state[IDX_PAP] != STATE_CLOSED) 4424 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4425 } 4426 4427 /* 4428 * That's the timeout routine if we are authenticator. Since the 4429 * authenticator is basically passive in PAP, we can't do much here. 4430 */ 4431 static void 4432 sppp_pap_TO(void *cookie) 4433 { 4434 struct sppp *sp = (struct sppp *)cookie; 4435 STDDCL; 4436 int s; 4437 4438 s = splnet(); 4439 if (debug) 4440 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n", 4441 SPP_ARGS(ifp), 4442 sppp_state_name(sp->state[IDX_PAP]), 4443 sp->rst_counter[IDX_PAP]); 4444 4445 if (--sp->rst_counter[IDX_PAP] < 0) 4446 /* TO- event */ 4447 switch (sp->state[IDX_PAP]) { 4448 case STATE_REQ_SENT: 4449 pap.tld(sp); 4450 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4451 break; 4452 } 4453 else 4454 /* TO+ event, not very much we could do */ 4455 switch (sp->state[IDX_PAP]) { 4456 case STATE_REQ_SENT: 4457 /* sppp_cp_change_state() will restart the timer */ 4458 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4459 break; 4460 } 4461 4462 splx(s); 4463 } 4464 4465 /* 4466 * That's the timeout handler if we are peer. Since the peer is active, 4467 * we need to retransmit our PAP request since it is apparently lost. 4468 * XXX We should impose a max counter. 4469 */ 4470 static void 4471 sppp_pap_my_TO(void *cookie) 4472 { 4473 struct sppp *sp = (struct sppp *)cookie; 4474 STDDCL; 4475 4476 if (debug) 4477 log(LOG_DEBUG, SPP_FMT "pap peer TO\n", 4478 SPP_ARGS(ifp)); 4479 4480 pap.scr(sp); 4481 } 4482 4483 static void 4484 sppp_pap_tlu(struct sppp *sp) 4485 { 4486 STDDCL; 4487 int x; 4488 4489 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4490 4491 if (debug) 4492 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 4493 SPP_ARGS(ifp), pap.name); 4494 4495 x = splnet(); 4496 /* indicate to LCP that we need to be closed down */ 4497 sp->lcp.protos |= (1 << IDX_PAP); 4498 4499 if (sp->pp_flags & PP_NEEDAUTH) { 4500 /* 4501 * Remote is authenticator, but his auth proto didn't 4502 * complete yet. Defer the transition to network 4503 * phase. 4504 */ 4505 splx(x); 4506 return; 4507 } 4508 splx(x); 4509 sppp_phase_network(sp); 4510 } 4511 4512 static void 4513 sppp_pap_tld(struct sppp *sp) 4514 { 4515 STDDCL; 4516 4517 if (debug) 4518 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp)); 4519 #if defined(__NetBSD__) 4520 callout_stop(&sp->ch[IDX_PAP]); 4521 #else 4522 untimeout(pap.TO, (void *)sp 4523 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4524 , sp->ch[IDX_PAP] 4525 #endif 4526 ); 4527 #endif /* __NetBSD__ */ 4528 4529 #if defined(__NetBSD__) 4530 callout_stop(&sp->pap_my_to_ch); 4531 #else 4532 untimeout(sppp_pap_my_TO, (void *)sp 4533 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4534 , sp->pap_my_to_ch 4535 #endif 4536 ); 4537 #endif /* __NetBSD__ */ 4538 sp->lcp.protos &= ~(1 << IDX_PAP); 4539 4540 lcp.Close(sp); 4541 } 4542 4543 static void 4544 sppp_pap_scr(struct sppp *sp) 4545 { 4546 u_char idlen, pwdlen; 4547 4548 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4549 pwdlen = sppp_strnlen(sp->myauth.secret, AUTHKEYLEN); 4550 idlen = sppp_strnlen(sp->myauth.name, AUTHNAMELEN); 4551 4552 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4553 sizeof idlen, (const char *)&idlen, 4554 (size_t)idlen, sp->myauth.name, 4555 sizeof pwdlen, (const char *)&pwdlen, 4556 (size_t)pwdlen, sp->myauth.secret, 4557 0); 4558 } 4559 /* 4561 * Random miscellaneous functions. 4562 */ 4563 4564 /* 4565 * Send a PAP or CHAP proto packet. 4566 * 4567 * Varadic function, each of the elements for the ellipsis is of type 4568 * ``size_t mlen, const u_char *msg''. Processing will stop iff 4569 * mlen == 0. 4570 * NOTE: never declare variadic functions with types subject to type 4571 * promotion (i.e. u_char). This is asking for big trouble depending 4572 * on the architecture you are on... 4573 */ 4574 4575 static void 4576 sppp_auth_send(const struct cp *cp, struct sppp *sp, 4577 unsigned int type, unsigned int id, 4578 ...) 4579 { 4580 STDDCL; 4581 struct lcp_header *lh; 4582 struct mbuf *m; 4583 u_char *p; 4584 int len; 4585 size_t pkthdrlen; 4586 unsigned int mlen; 4587 const char *msg; 4588 va_list ap; 4589 4590 MGETHDR (m, M_DONTWAIT, MT_DATA); 4591 if (! m) 4592 return; 4593 m->m_pkthdr.rcvif = 0; 4594 4595 if (sp->pp_flags & PP_NOFRAMING) { 4596 *mtod(m, u_int16_t*) = htons(cp->proto); 4597 pkthdrlen = 2; 4598 lh = (struct lcp_header*)(mtod(m, u_int8_t*)+2); 4599 } else { 4600 struct ppp_header *h; 4601 h = mtod (m, struct ppp_header*); 4602 h->address = PPP_ALLSTATIONS; /* broadcast address */ 4603 h->control = PPP_UI; /* Unnumbered Info */ 4604 h->protocol = htons(cp->proto); 4605 pkthdrlen = PPP_HEADER_LEN; 4606 4607 lh = (struct lcp_header*)(h + 1); 4608 } 4609 4610 lh->type = type; 4611 lh->ident = id; 4612 p = (u_char*) (lh+1); 4613 4614 va_start(ap, id); 4615 len = 0; 4616 4617 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 4618 msg = va_arg(ap, const char *); 4619 len += mlen; 4620 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 4621 va_end(ap); 4622 m_freem(m); 4623 return; 4624 } 4625 4626 bcopy(msg, p, mlen); 4627 p += mlen; 4628 } 4629 va_end(ap); 4630 4631 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 4632 lh->len = htons (LCP_HEADER_LEN + len); 4633 4634 if (debug) { 4635 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 4636 SPP_ARGS(ifp), cp->name, 4637 sppp_auth_type_name(cp->proto, lh->type), 4638 lh->ident, ntohs(lh->len)); 4639 if (len) 4640 sppp_print_bytes((u_char*) (lh+1), len); 4641 addlog(">\n"); 4642 } 4643 if (IF_QFULL (&sp->pp_cpq)) { 4644 IF_DROP (&sp->pp_fastq); 4645 IF_DROP (&ifp->if_snd); 4646 m_freem (m); 4647 ++ifp->if_oerrors; 4648 } else 4649 IF_ENQUEUE (&sp->pp_cpq, m); 4650 if (! (ifp->if_flags & IFF_OACTIVE)) 4651 (*ifp->if_start) (ifp); 4652 ifp->if_obytes += m->m_pkthdr.len + 3; 4653 } 4654 4655 /* 4656 * Send keepalive packets, every 10 seconds. 4657 */ 4658 static void 4659 sppp_keepalive(void *dummy) 4660 { 4661 struct sppp *sp; 4662 int s; 4663 4664 s = splnet(); 4665 for (sp=spppq; sp; sp=sp->pp_next) { 4666 struct ifnet *ifp = &sp->pp_if; 4667 4668 /* Keepalive mode disabled or channel down? */ 4669 if (! (sp->pp_flags & PP_KEEPALIVE) || 4670 ! (ifp->if_flags & IFF_RUNNING)) 4671 continue; 4672 4673 /* No keepalive in PPP mode if LCP not opened yet. */ 4674 if (! (sp->pp_flags & PP_CISCO) && 4675 sp->pp_phase < PHASE_AUTHENTICATE) 4676 continue; 4677 4678 if (sp->pp_alivecnt == MAXALIVECNT) { 4679 /* No keepalive packets got. Stop the interface. */ 4680 printf (SPP_FMT "down\n", SPP_ARGS(ifp)); 4681 if_down (ifp); 4682 IFQ_PURGE (&sp->pp_cpq); 4683 if (! (sp->pp_flags & PP_CISCO)) { 4684 /* XXX */ 4685 /* Shut down the PPP link. */ 4686 lcp.Down(sp); 4687 /* Initiate negotiation. XXX */ 4688 lcp.Up(sp); 4689 } 4690 } 4691 if (sp->pp_alivecnt <= MAXALIVECNT) 4692 ++sp->pp_alivecnt; 4693 if (sp->pp_flags & PP_CISCO) 4694 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ, 4695 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 4696 else if (sp->pp_phase >= PHASE_AUTHENTICATE) { 4697 long nmagic = htonl (sp->lcp.magic); 4698 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 4699 sppp_cp_send (sp, PPP_LCP, ECHO_REQ, 4700 sp->lcp.echoid, 4, &nmagic); 4701 } 4702 } 4703 splx(s); 4704 #if defined(__NetBSD__) 4705 callout_reset(&keepalive_ch, hz * 10, sppp_keepalive, NULL); 4706 #else 4707 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4708 keepalive_ch = 4709 #endif 4710 timeout(sppp_keepalive, 0, hz * 10); 4711 #endif /* __NetBSD__ */ 4712 } 4713 4714 /* 4715 * Get both IP addresses. 4716 */ 4717 static void 4718 sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst, u_long *srcmask) 4719 { 4720 struct ifnet *ifp = &sp->pp_if; 4721 struct ifaddr *ifa; 4722 struct sockaddr_in *si, *sm; 4723 u_long ssrc, ddst; 4724 4725 sm = NULL; 4726 ssrc = ddst = 0L; 4727 /* 4728 * Pick the first AF_INET address from the list, 4729 * aliases don't make any sense on a p2p link anyway. 4730 */ 4731 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4732 for (ifa = ifp->if_addrhead.tqh_first, si = 0; 4733 ifa; 4734 ifa = ifa->ifa_link.tqe_next) 4735 #elif defined(__NetBSD__) || defined (__OpenBSD__) 4736 for (ifa = ifp->if_addrlist.tqh_first, si = 0; 4737 ifa; 4738 ifa = ifa->ifa_list.tqe_next) 4739 #else 4740 for (ifa = ifp->if_addrlist, si = 0; 4741 ifa; 4742 ifa = ifa->ifa_next) 4743 #endif 4744 if (ifa->ifa_addr->sa_family == AF_INET) { 4745 si = (struct sockaddr_in *)ifa->ifa_addr; 4746 sm = (struct sockaddr_in *)ifa->ifa_netmask; 4747 if (si) 4748 break; 4749 } 4750 if (ifa) { 4751 if (si && si->sin_addr.s_addr) { 4752 ssrc = si->sin_addr.s_addr; 4753 if (srcmask) 4754 *srcmask = ntohl(sm->sin_addr.s_addr); 4755 } 4756 4757 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 4758 if (si && si->sin_addr.s_addr) 4759 ddst = si->sin_addr.s_addr; 4760 } 4761 4762 if (dst) *dst = ntohl(ddst); 4763 if (src) *src = ntohl(ssrc); 4764 } 4765 4766 /* 4767 * Set my IP address. Must be called at splnet. 4768 */ 4769 static void 4770 sppp_set_ip_addr(struct sppp *sp, u_long src) 4771 { 4772 STDDCL; 4773 struct ifaddr *ifa; 4774 struct sockaddr_in *si; 4775 4776 /* 4777 * Pick the first AF_INET address from the list, 4778 * aliases don't make any sense on a p2p link anyway. 4779 */ 4780 4781 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4782 for (ifa = ifp->if_addrhead.tqh_first, si = 0; 4783 ifa; 4784 ifa = ifa->ifa_link.tqe_next) 4785 #elif defined(__NetBSD__) || defined (__OpenBSD__) 4786 for (ifa = ifp->if_addrlist.tqh_first, si = 0; 4787 ifa; 4788 ifa = ifa->ifa_list.tqe_next) 4789 #else 4790 for (ifa = ifp->if_addrlist, si = 0; 4791 ifa; 4792 ifa = ifa->ifa_next) 4793 #endif 4794 { 4795 if (ifa->ifa_addr->sa_family == AF_INET) 4796 { 4797 si = (struct sockaddr_in *)ifa->ifa_addr; 4798 if (si) 4799 break; 4800 } 4801 } 4802 4803 if (ifa && si) 4804 { 4805 int error; 4806 #if __NetBSD_Version__ >= 103080000 4807 struct sockaddr_in new_sin = *si; 4808 4809 new_sin.sin_addr.s_addr = htonl(src); 4810 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 1); 4811 if(debug && error) 4812 { 4813 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: in_ifinit " 4814 " failed, error=%d\n", SPP_ARGS(ifp), error); 4815 } 4816 #else 4817 /* delete old route */ 4818 error = rtinit(ifa, (int)RTM_DELETE, RTF_HOST); 4819 if(debug && error) 4820 { 4821 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit DEL failed, error=%d\n", 4822 SPP_ARGS(ifp), error); 4823 } 4824 4825 /* set new address */ 4826 si->sin_addr.s_addr = htonl(src); 4827 4828 /* add new route */ 4829 error = rtinit(ifa, (int)RTM_ADD, RTF_HOST); 4830 if (debug && error) 4831 { 4832 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit ADD failed, error=%d", 4833 SPP_ARGS(ifp), error); 4834 } 4835 #endif 4836 } 4837 } 4838 4839 #ifdef INET6 4840 /* 4841 * Get both IPv6 addresses. 4842 */ 4843 static void 4844 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 4845 struct in6_addr *srcmask) 4846 { 4847 struct ifnet *ifp = &sp->pp_if; 4848 struct ifaddr *ifa; 4849 struct sockaddr_in6 *si, *sm; 4850 struct in6_addr ssrc, ddst; 4851 4852 sm = NULL; 4853 bzero(&ssrc, sizeof(ssrc)); 4854 bzero(&ddst, sizeof(ddst)); 4855 /* 4856 * Pick the first link-local AF_INET6 address from the list, 4857 * aliases don't make any sense on a p2p link anyway. 4858 */ 4859 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4860 for (ifa = ifp->if_addrhead.tqh_first, si = 0; 4861 ifa; 4862 ifa = ifa->ifa_link.tqe_next) 4863 #elif defined(__NetBSD__) || defined (__OpenBSD__) 4864 for (ifa = ifp->if_addrlist.tqh_first, si = 0; 4865 ifa; 4866 ifa = ifa->ifa_list.tqe_next) 4867 #else 4868 for (ifa = ifp->if_addrlist, si = 0; 4869 ifa; 4870 ifa = ifa->ifa_next) 4871 #endif 4872 if (ifa->ifa_addr->sa_family == AF_INET6) { 4873 si = (struct sockaddr_in6 *)ifa->ifa_addr; 4874 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 4875 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 4876 break; 4877 } 4878 if (ifa) { 4879 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 4880 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc)); 4881 if (srcmask) { 4882 bcopy(&sm->sin6_addr, srcmask, 4883 sizeof(*srcmask)); 4884 } 4885 } 4886 4887 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 4888 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 4889 bcopy(&si->sin6_addr, &ddst, sizeof(ddst)); 4890 } 4891 4892 if (dst) 4893 bcopy(&ddst, dst, sizeof(*dst)); 4894 if (src) 4895 bcopy(&ssrc, src, sizeof(*src)); 4896 } 4897 4898 #ifdef IPV6CP_MYIFID_DYN 4899 /* 4900 * Generate random ifid. 4901 */ 4902 static void 4903 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 4904 { 4905 /* TBD */ 4906 } 4907 4908 /* 4909 * Set my IPv6 address. Must be called at splnet. 4910 */ 4911 static void 4912 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 4913 { 4914 STDDCL; 4915 struct ifaddr *ifa; 4916 struct sockaddr_in6 *sin6; 4917 4918 /* 4919 * Pick the first link-local AF_INET6 address from the list, 4920 * aliases don't make any sense on a p2p link anyway. 4921 */ 4922 4923 sin6 = NULL; 4924 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4925 for (ifa = ifp->if_addrhead.tqh_first; 4926 ifa; 4927 ifa = ifa->ifa_link.tqe_next) 4928 #elif defined(__NetBSD__) || defined (__OpenBSD__) 4929 for (ifa = ifp->if_addrlist.tqh_first; 4930 ifa; 4931 ifa = ifa->ifa_list.tqe_next) 4932 #else 4933 for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) 4934 #endif 4935 { 4936 if (ifa->ifa_addr->sa_family == AF_INET6) 4937 { 4938 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 4939 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 4940 break; 4941 } 4942 } 4943 4944 if (ifa && sin6) 4945 { 4946 int error; 4947 struct sockaddr_in6 new_sin6 = *sin6; 4948 4949 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr)); 4950 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 4951 if (debug && error) 4952 { 4953 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit " 4954 " failed, error=%d\n", SPP_ARGS(ifp), error); 4955 } 4956 } 4957 } 4958 #endif 4959 4960 /* 4961 * Suggest a candidate address to be used by peer. 4962 */ 4963 static void 4964 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 4965 { 4966 struct in6_addr myaddr; 4967 struct timeval tv; 4968 4969 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4970 4971 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 4972 microtime(&tv); 4973 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 4974 myaddr.s6_addr[14] ^= 0xff; 4975 myaddr.s6_addr[15] ^= 0xff; 4976 } else { 4977 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 4978 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 4979 } 4980 if (suggest) 4981 bcopy(&myaddr, suggest, sizeof(myaddr)); 4982 } 4983 #endif /*INET6*/ 4984 4985 static int 4986 sppp_params(struct sppp *sp, int cmd, void *data) 4987 { 4988 struct ifreq *ifr = (struct ifreq *)data; 4989 struct spppreq spr; 4990 4991 #if 0 4992 /* 4993 * ifr->ifr_data is supposed to point to a struct spppreq. 4994 * Check the cmd word first before attempting to fetch all the 4995 * data. 4996 */ 4997 if ((subcmd = fuword(ifr->ifr_data)) == -1) 4998 return EFAULT; 4999 #endif 5000 5001 if (copyin((caddr_t)ifr->ifr_data, &spr, sizeof spr) != 0) 5002 return EFAULT; 5003 5004 switch (spr.cmd) { 5005 case SPPPIOGDEFS: 5006 if (cmd != (int)SIOCGIFGENERIC) 5007 return EINVAL; 5008 /* 5009 * We copy over the entire current state, but clean 5010 * out some of the stuff we don't wanna pass up. 5011 * Remember, SIOCGIFGENERIC is unprotected, and can be 5012 * called by any user. No need to ever get PAP or 5013 * CHAP secrets back to userland anyway. 5014 */ 5015 bcopy(sp, &spr.defs, sizeof(struct sppp)); 5016 bzero(spr.defs.myauth.secret, AUTHKEYLEN); 5017 bzero(spr.defs.myauth.challenge, AUTHKEYLEN); 5018 bzero(spr.defs.hisauth.secret, AUTHKEYLEN); 5019 bzero(spr.defs.hisauth.challenge, AUTHKEYLEN); 5020 return copyout(&spr, (caddr_t)ifr->ifr_data, sizeof spr); 5021 5022 case SPPPIOSDEFS: 5023 if (cmd != (int)SIOCSIFGENERIC) 5024 return EINVAL; 5025 /* 5026 * We have a very specific idea of which fields we allow 5027 * being passed back from userland, so to not clobber our 5028 * current state. For one, we only allow setting 5029 * anything if LCP is in dead phase. Once the LCP 5030 * negotiations started, the authentication settings must 5031 * not be changed again. (The administrator can force an 5032 * ifconfig down in order to get LCP back into dead 5033 * phase.) 5034 * 5035 * Also, we only allow for authentication parameters to be 5036 * specified. 5037 * 5038 * XXX Should allow to set or clear pp_flags. 5039 * 5040 * Finally, if the respective authentication protocol to 5041 * be used is set differently than 0, but the secret is 5042 * passed as all zeros, we don't trash the existing secret. 5043 * This allows an administrator to change the system name 5044 * only without clobbering the secret (which he didn't get 5045 * back in a previous SPPPIOGDEFS call). However, the 5046 * secrets are cleared if the authentication protocol is 5047 * reset to 0. 5048 */ 5049 if (sp->pp_phase != PHASE_DEAD) 5050 return EBUSY; 5051 5052 if ((spr.defs.myauth.proto != 0 && spr.defs.myauth.proto != PPP_PAP && 5053 spr.defs.myauth.proto != PPP_CHAP) || 5054 (spr.defs.hisauth.proto != 0 && spr.defs.hisauth.proto != PPP_PAP && 5055 spr.defs.hisauth.proto != PPP_CHAP)) 5056 return EINVAL; 5057 5058 if (spr.defs.myauth.proto == 0) 5059 /* resetting myauth */ 5060 bzero(&sp->myauth, sizeof sp->myauth); 5061 else { 5062 /* setting/changing myauth */ 5063 sp->myauth.proto = spr.defs.myauth.proto; 5064 bcopy(spr.defs.myauth.name, sp->myauth.name, AUTHNAMELEN); 5065 if (spr.defs.myauth.secret[0] != '\0') 5066 bcopy(spr.defs.myauth.secret, sp->myauth.secret, 5067 AUTHKEYLEN); 5068 } 5069 if (spr.defs.hisauth.proto == 0) 5070 /* resetting hisauth */ 5071 bzero(&sp->hisauth, sizeof sp->hisauth); 5072 else { 5073 /* setting/changing hisauth */ 5074 sp->hisauth.proto = spr.defs.hisauth.proto; 5075 sp->hisauth.flags = spr.defs.hisauth.flags; 5076 bcopy(spr.defs.hisauth.name, sp->hisauth.name, AUTHNAMELEN); 5077 if (spr.defs.hisauth.secret[0] != '\0') 5078 bcopy(spr.defs.hisauth.secret, sp->hisauth.secret, 5079 AUTHKEYLEN); 5080 } 5081 break; 5082 5083 default: 5084 return EINVAL; 5085 } 5086 5087 return 0; 5088 } 5089 5090 static void 5091 sppp_phase_network(struct sppp *sp) 5092 { 5093 STDDCL; 5094 int i; 5095 u_long mask; 5096 5097 sp->pp_phase = PHASE_NETWORK; 5098 5099 if(debug) 5100 { 5101 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 5102 sppp_phase_name(sp->pp_phase)); 5103 } 5104 5105 /* Notify NCPs now. */ 5106 for (i = 0; i < IDX_COUNT; i++) 5107 if ((cps[i])->flags & CP_NCP) 5108 (cps[i])->Open(sp); 5109 5110 /* Send Up events to all NCPs. */ 5111 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5112 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) 5113 (cps[i])->Up(sp); 5114 5115 /* if no NCP is starting, all this was in vain, close down */ 5116 sppp_lcp_check_and_close(sp); 5117 } 5118 5119 5120 static const char * 5121 sppp_cp_type_name(u_char type) 5122 { 5123 static char buf[12]; 5124 switch (type) { 5125 case CONF_REQ: return "conf-req"; 5126 case CONF_ACK: return "conf-ack"; 5127 case CONF_NAK: return "conf-nak"; 5128 case CONF_REJ: return "conf-rej"; 5129 case TERM_REQ: return "term-req"; 5130 case TERM_ACK: return "term-ack"; 5131 case CODE_REJ: return "code-rej"; 5132 case PROTO_REJ: return "proto-rej"; 5133 case ECHO_REQ: return "echo-req"; 5134 case ECHO_REPLY: return "echo-reply"; 5135 case DISC_REQ: return "discard-req"; 5136 } 5137 sprintf (buf, "0x%x", type); 5138 return buf; 5139 } 5140 5141 static const char * 5142 sppp_auth_type_name(u_short proto, u_char type) 5143 { 5144 static char buf[12]; 5145 switch (proto) { 5146 case PPP_CHAP: 5147 switch (type) { 5148 case CHAP_CHALLENGE: return "challenge"; 5149 case CHAP_RESPONSE: return "response"; 5150 case CHAP_SUCCESS: return "success"; 5151 case CHAP_FAILURE: return "failure"; 5152 } 5153 case PPP_PAP: 5154 switch (type) { 5155 case PAP_REQ: return "req"; 5156 case PAP_ACK: return "ack"; 5157 case PAP_NAK: return "nak"; 5158 } 5159 } 5160 sprintf (buf, "0x%x", type); 5161 return buf; 5162 } 5163 5164 static const char * 5165 sppp_lcp_opt_name(u_char opt) 5166 { 5167 static char buf[12]; 5168 switch (opt) { 5169 case LCP_OPT_MRU: return "mru"; 5170 case LCP_OPT_ASYNC_MAP: return "async-map"; 5171 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 5172 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 5173 case LCP_OPT_MAGIC: return "magic"; 5174 case LCP_OPT_PROTO_COMP: return "proto-comp"; 5175 case LCP_OPT_ADDR_COMP: return "addr-comp"; 5176 } 5177 sprintf (buf, "0x%x", opt); 5178 return buf; 5179 } 5180 5181 static const char * 5182 sppp_ipcp_opt_name(u_char opt) 5183 { 5184 static char buf[12]; 5185 switch (opt) { 5186 case IPCP_OPT_ADDRESSES: return "addresses"; 5187 case IPCP_OPT_COMPRESSION: return "compression"; 5188 case IPCP_OPT_ADDRESS: return "address"; 5189 } 5190 sprintf (buf, "0x%x", opt); 5191 return buf; 5192 } 5193 5194 #ifdef INET6 5195 static const char * 5196 sppp_ipv6cp_opt_name(u_char opt) 5197 { 5198 static char buf[12]; 5199 switch (opt) { 5200 case IPV6CP_OPT_IFID: return "ifid"; 5201 case IPV6CP_OPT_COMPRESSION: return "compression"; 5202 } 5203 sprintf (buf, "0x%x", opt); 5204 return buf; 5205 } 5206 #endif 5207 5208 static const char * 5209 sppp_state_name(int state) 5210 { 5211 switch (state) { 5212 case STATE_INITIAL: return "initial"; 5213 case STATE_STARTING: return "starting"; 5214 case STATE_CLOSED: return "closed"; 5215 case STATE_STOPPED: return "stopped"; 5216 case STATE_CLOSING: return "closing"; 5217 case STATE_STOPPING: return "stopping"; 5218 case STATE_REQ_SENT: return "req-sent"; 5219 case STATE_ACK_RCVD: return "ack-rcvd"; 5220 case STATE_ACK_SENT: return "ack-sent"; 5221 case STATE_OPENED: return "opened"; 5222 } 5223 return "illegal"; 5224 } 5225 5226 static const char * 5227 sppp_phase_name(enum ppp_phase phase) 5228 { 5229 switch (phase) { 5230 case PHASE_DEAD: return "dead"; 5231 case PHASE_ESTABLISH: return "establish"; 5232 case PHASE_TERMINATE: return "terminate"; 5233 case PHASE_AUTHENTICATE: return "authenticate"; 5234 case PHASE_NETWORK: return "network"; 5235 } 5236 return "illegal"; 5237 } 5238 5239 static const char * 5240 sppp_proto_name(u_short proto) 5241 { 5242 static char buf[12]; 5243 switch (proto) { 5244 case PPP_LCP: return "lcp"; 5245 case PPP_IPCP: return "ipcp"; 5246 case PPP_PAP: return "pap"; 5247 case PPP_CHAP: return "chap"; 5248 case PPP_IPV6CP: return "ipv6cp"; 5249 } 5250 sprintf(buf, "0x%x", (unsigned)proto); 5251 return buf; 5252 } 5253 5254 static void 5255 sppp_print_bytes(const u_char *p, u_short len) 5256 { 5257 addlog(" %02x", *p++); 5258 while (--len > 0) 5259 addlog("-%02x", *p++); 5260 } 5261 5262 static void 5263 sppp_print_string(const char *p, u_short len) 5264 { 5265 u_char c; 5266 5267 while (len-- > 0) { 5268 c = *p++; 5269 /* 5270 * Print only ASCII chars directly. RFC 1994 recommends 5271 * using only them, but we don't rely on it. */ 5272 if (c < ' ' || c > '~') 5273 addlog("\\x%x", c); 5274 else 5275 addlog("%c", c); 5276 } 5277 } 5278 5279 static const char * 5280 sppp_dotted_quad(u_long addr) 5281 { 5282 static char s[16]; 5283 sprintf(s, "%d.%d.%d.%d", 5284 (int)((addr >> 24) & 0xff), 5285 (int)((addr >> 16) & 0xff), 5286 (int)((addr >> 8) & 0xff), 5287 (int)(addr & 0xff)); 5288 return s; 5289 } 5290 5291 static int 5292 sppp_strnlen(u_char *p, int max) 5293 { 5294 int len; 5295 5296 for (len = 0; len < max && *p; ++p) 5297 ++len; 5298 return len; 5299 } 5300 5301 /* a dummy, used to drop uninteresting events */ 5302 static void 5303 sppp_null(struct sppp *unused) 5304 { 5305 /* do just nothing */ 5306 } 5307 /* 5308 * This file is large. Tell emacs to highlight it nevertheless. 5309 * 5310 * Local Variables: 5311 * hilit-auto-highlight-maxout: 120000 5312 * End: 5313 */ 5314
Indexes created Fri Sep 26 20:09:58 GMT 2025