if_spppsubr.c revision 1.46.4.4
1 /* $NetBSD: if_spppsubr.c,v 1.46.4.4 2002/08/17 05:49:31 lukem 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 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: if_spppsubr.c,v 1.46.4.4 2002/08/17 05:49:31 lukem Exp $"); 32 33 #include "opt_inet.h" 34 #include "opt_ipx.h" 35 #include "opt_iso.h" 36 #include "opt_ns.h" 37 38 #include <sys/param.h> 39 #include <sys/proc.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/sockio.h> 43 #include <sys/socket.h> 44 #include <sys/syslog.h> 45 #include <sys/malloc.h> 46 #include <sys/mbuf.h> 47 #include <sys/callout.h> 48 #include <sys/md5.h> 49 50 #include <net/if.h> 51 #include <net/netisr.h> 52 #include <net/if_types.h> 53 #include <net/route.h> 54 #include <net/ppp_defs.h> 55 56 #include <machine/stdarg.h> 57 58 #include <netinet/in.h> 59 #include <netinet/in_systm.h> 60 #include <netinet/in_var.h> 61 #ifdef INET 62 #include <netinet/ip.h> 63 #include <netinet/tcp.h> 64 #endif 65 #include <net/ethertypes.h> 66 67 #ifdef IPX 68 #include <netipx/ipx.h> 69 #include <netipx/ipx_if.h> 70 #endif 71 72 #ifdef NS 73 #include <netns/ns.h> 74 #include <netns/ns_if.h> 75 #endif 76 77 #ifdef ISO 78 #include <netiso/argo_debug.h> 79 #include <netiso/iso.h> 80 #include <netiso/iso_var.h> 81 #include <netiso/iso_snpac.h> 82 #endif 83 84 #include <net/if_sppp.h> 85 #include <net/if_spppvar.h> 86 87 #define MAXALIVECNT 3 /* max. alive packets */ 88 #define DEFAULT_MAX_AUTH_FAILURES 5 /* max. auth. failures */ 89 90 /* 91 * Interface flags that can be set in an ifconfig command. 92 * 93 * Setting link0 will make the link passive, i.e. it will be marked 94 * as being administrative openable, but won't be opened to begin 95 * with. Incoming calls will be answered, or subsequent calls with 96 * -link1 will cause the administrative open of the LCP layer. 97 * 98 * Setting link1 will cause the link to auto-dial only as packets 99 * arrive to be sent. 100 * 101 * Setting IFF_DEBUG will syslog the option negotiation and state 102 * transitions at level kern.debug. Note: all logs consistently look 103 * like 104 * 105 * <if-name><unit>: <proto-name> <additional info...> 106 * 107 * with <if-name><unit> being something like "bppp0", and <proto-name> 108 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. 109 */ 110 111 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 112 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 113 114 #define CONF_REQ 1 /* PPP configure request */ 115 #define CONF_ACK 2 /* PPP configure acknowledge */ 116 #define CONF_NAK 3 /* PPP configure negative ack */ 117 #define CONF_REJ 4 /* PPP configure reject */ 118 #define TERM_REQ 5 /* PPP terminate request */ 119 #define TERM_ACK 6 /* PPP terminate acknowledge */ 120 #define CODE_REJ 7 /* PPP code reject */ 121 #define PROTO_REJ 8 /* PPP protocol reject */ 122 #define ECHO_REQ 9 /* PPP echo request */ 123 #define ECHO_REPLY 10 /* PPP echo reply */ 124 #define DISC_REQ 11 /* PPP discard request */ 125 126 #define LCP_OPT_MRU 1 /* maximum receive unit */ 127 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 128 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 129 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 130 #define LCP_OPT_MAGIC 5 /* magic number */ 131 #define LCP_OPT_RESERVED 6 /* reserved */ 132 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 133 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 134 135 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 136 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol */ 137 #define IPCP_OPT_ADDRESS 3 /* local IP address */ 138 #define IPCP_OPT_PRIMDNS 129 /* primary remote dns address */ 139 #define IPCP_OPT_SECDNS 131 /* secondary remote dns address */ 140 141 #define IPV6CP_OPT_IFID 1 /* interface identifier */ 142 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 143 144 #define PAP_REQ 1 /* PAP name/password request */ 145 #define PAP_ACK 2 /* PAP acknowledge */ 146 #define PAP_NAK 3 /* PAP fail */ 147 148 #define CHAP_CHALLENGE 1 /* CHAP challenge request */ 149 #define CHAP_RESPONSE 2 /* CHAP challenge response */ 150 #define CHAP_SUCCESS 3 /* CHAP response ok */ 151 #define CHAP_FAILURE 4 /* CHAP response failed */ 152 153 #define CHAP_MD5 5 /* hash algorithm - MD5 */ 154 155 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 156 #define CISCO_UNICAST 0x0f /* Cisco unicast address */ 157 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 158 #define CISCO_ADDR_REQ 0 /* Cisco address request */ 159 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 160 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 161 162 /* states are named and numbered according to RFC 1661 */ 163 #define STATE_INITIAL 0 164 #define STATE_STARTING 1 165 #define STATE_CLOSED 2 166 #define STATE_STOPPED 3 167 #define STATE_CLOSING 4 168 #define STATE_STOPPING 5 169 #define STATE_REQ_SENT 6 170 #define STATE_ACK_RCVD 7 171 #define STATE_ACK_SENT 8 172 #define STATE_OPENED 9 173 174 struct ppp_header { 175 u_char address; 176 u_char control; 177 u_short protocol; 178 } __attribute__((__packed__)); 179 #define PPP_HEADER_LEN sizeof (struct ppp_header) 180 181 struct lcp_header { 182 u_char type; 183 u_char ident; 184 u_short len; 185 } __attribute__((__packed__)); 186 #define LCP_HEADER_LEN sizeof (struct lcp_header) 187 188 struct cisco_packet { 189 u_int32_t type; 190 u_int32_t par1; 191 u_int32_t par2; 192 u_short rel; 193 u_short time0; 194 u_short time1; 195 } __attribute__((__packed__)); 196 #define CISCO_PACKET_LEN 18 197 198 /* 199 * We follow the spelling and capitalization of RFC 1661 here, to make 200 * it easier comparing with the standard. Please refer to this RFC in 201 * case you can't make sense out of these abbreviation; it will also 202 * explain the semantics related to the various events and actions. 203 */ 204 struct cp { 205 u_short proto; /* PPP control protocol number */ 206 u_char protoidx; /* index into state table in struct sppp */ 207 u_char flags; 208 #define CP_LCP 0x01 /* this is the LCP */ 209 #define CP_AUTH 0x02 /* this is an authentication protocol */ 210 #define CP_NCP 0x04 /* this is a NCP */ 211 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 212 const char *name; /* name of this control protocol */ 213 /* event handlers */ 214 void (*Up)(struct sppp *sp); 215 void (*Down)(struct sppp *sp); 216 void (*Open)(struct sppp *sp); 217 void (*Close)(struct sppp *sp); 218 void (*TO)(void *sp); 219 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len); 220 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len); 221 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len); 222 /* actions */ 223 void (*tlu)(struct sppp *sp); 224 void (*tld)(struct sppp *sp); 225 void (*tls)(struct sppp *sp); 226 void (*tlf)(struct sppp *sp); 227 void (*scr)(struct sppp *sp); 228 }; 229 230 static struct sppp *spppq; 231 static struct callout keepalive_ch; 232 233 #ifdef __FreeBSD__ 234 #define SPP_FMT "%s%d: " 235 #define SPP_ARGS(ifp) (ifp)->if_name, (ifp)->if_unit 236 #else 237 #define SPP_FMT "%s: " 238 #define SPP_ARGS(ifp) (ifp)->if_xname 239 #endif 240 241 #ifdef INET 242 /* 243 * The following disgusting hack gets around the problem that IP TOS 244 * can't be set yet. We want to put "interactive" traffic on a high 245 * priority queue. To decide if traffic is interactive, we check that 246 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 247 * 248 * XXX is this really still necessary? - joerg - 249 */ 250 static u_short interactive_ports[8] = { 251 0, 513, 0, 0, 252 0, 21, 0, 23, 253 }; 254 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 255 #endif 256 257 /* almost every function needs these */ 258 #define STDDCL \ 259 struct ifnet *ifp = &sp->pp_if; \ 260 int debug = ifp->if_flags & IFF_DEBUG 261 262 static int sppp_output(struct ifnet *ifp, struct mbuf *m, 263 struct sockaddr *dst, struct rtentry *rt); 264 265 static void sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2); 266 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m); 267 268 static void sppp_cp_input(const struct cp *cp, struct sppp *sp, 269 struct mbuf *m); 270 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 271 u_char ident, u_short len, void *data); 272 /* static void sppp_cp_timeout(void *arg); */ 273 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp, 274 int newstate); 275 static void sppp_auth_send(const struct cp *cp, 276 struct sppp *sp, unsigned int type, unsigned int id, 277 ...); 278 279 static void sppp_up_event(const struct cp *cp, struct sppp *sp); 280 static void sppp_down_event(const struct cp *cp, struct sppp *sp); 281 static void sppp_open_event(const struct cp *cp, struct sppp *sp); 282 static void sppp_close_event(const struct cp *cp, struct sppp *sp); 283 static void sppp_to_event(const struct cp *cp, struct sppp *sp); 284 285 static void sppp_null(struct sppp *sp); 286 287 static void sppp_lcp_init(struct sppp *sp); 288 static void sppp_lcp_up(struct sppp *sp); 289 static void sppp_lcp_down(struct sppp *sp); 290 static void sppp_lcp_open(struct sppp *sp); 291 static void sppp_lcp_close(struct sppp *sp); 292 static void sppp_lcp_TO(void *sp); 293 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 294 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 295 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 296 static void sppp_lcp_tlu(struct sppp *sp); 297 static void sppp_lcp_tld(struct sppp *sp); 298 static void sppp_lcp_tls(struct sppp *sp); 299 static void sppp_lcp_tlf(struct sppp *sp); 300 static void sppp_lcp_scr(struct sppp *sp); 301 static void sppp_lcp_check_and_close(struct sppp *sp); 302 static int sppp_ncp_check(struct sppp *sp); 303 304 static void sppp_ipcp_init(struct sppp *sp); 305 static void sppp_ipcp_up(struct sppp *sp); 306 static void sppp_ipcp_down(struct sppp *sp); 307 static void sppp_ipcp_open(struct sppp *sp); 308 static void sppp_ipcp_close(struct sppp *sp); 309 static void sppp_ipcp_TO(void *sp); 310 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 311 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 312 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 313 static void sppp_ipcp_tlu(struct sppp *sp); 314 static void sppp_ipcp_tld(struct sppp *sp); 315 static void sppp_ipcp_tls(struct sppp *sp); 316 static void sppp_ipcp_tlf(struct sppp *sp); 317 static void sppp_ipcp_scr(struct sppp *sp); 318 319 static void sppp_ipv6cp_init(struct sppp *sp); 320 static void sppp_ipv6cp_up(struct sppp *sp); 321 static void sppp_ipv6cp_down(struct sppp *sp); 322 static void sppp_ipv6cp_open(struct sppp *sp); 323 static void sppp_ipv6cp_close(struct sppp *sp); 324 static void sppp_ipv6cp_TO(void *sp); 325 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len); 326 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 327 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 328 static void sppp_ipv6cp_tlu(struct sppp *sp); 329 static void sppp_ipv6cp_tld(struct sppp *sp); 330 static void sppp_ipv6cp_tls(struct sppp *sp); 331 static void sppp_ipv6cp_tlf(struct sppp *sp); 332 static void sppp_ipv6cp_scr(struct sppp *sp); 333 334 static void sppp_pap_input(struct sppp *sp, struct mbuf *m); 335 static void sppp_pap_init(struct sppp *sp); 336 static void sppp_pap_open(struct sppp *sp); 337 static void sppp_pap_close(struct sppp *sp); 338 static void sppp_pap_TO(void *sp); 339 static void sppp_pap_my_TO(void *sp); 340 static void sppp_pap_tlu(struct sppp *sp); 341 static void sppp_pap_tld(struct sppp *sp); 342 static void sppp_pap_scr(struct sppp *sp); 343 344 static void sppp_chap_input(struct sppp *sp, struct mbuf *m); 345 static void sppp_chap_init(struct sppp *sp); 346 static void sppp_chap_open(struct sppp *sp); 347 static void sppp_chap_close(struct sppp *sp); 348 static void sppp_chap_TO(void *sp); 349 static void sppp_chap_tlu(struct sppp *sp); 350 static void sppp_chap_tld(struct sppp *sp); 351 static void sppp_chap_scr(struct sppp *sp); 352 353 static const char *sppp_auth_type_name(u_short proto, u_char type); 354 static const char *sppp_cp_type_name(u_char type); 355 static const char *sppp_dotted_quad(u_int32_t addr); 356 static const char *sppp_ipcp_opt_name(u_char opt); 357 #ifdef INET6 358 static const char *sppp_ipv6cp_opt_name(u_char opt); 359 #endif 360 static const char *sppp_lcp_opt_name(u_char opt); 361 static const char *sppp_phase_name(int phase); 362 static const char *sppp_proto_name(u_short proto); 363 static const char *sppp_state_name(int state); 364 static int sppp_params(struct sppp *sp, int cmd, void *data); 365 static void sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, 366 u_int32_t *srcmask); 367 static void sppp_keepalive(void *dummy); 368 static void sppp_phase_network(struct sppp *sp); 369 static void sppp_print_bytes(const u_char *p, u_short len); 370 static void sppp_print_string(const char *p, u_short len); 371 static void sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr); 372 static void sppp_clear_ip_addrs(struct sppp *sp); 373 #ifdef INET6 374 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, 375 struct in6_addr *dst, struct in6_addr *srcmask); 376 #ifdef IPV6CP_MYIFID_DYN 377 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src); 378 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src); 379 #endif 380 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src); 381 #endif 382 383 /* our control protocol descriptors */ 384 static const struct cp lcp = { 385 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 386 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close, 387 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, 388 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, 389 sppp_lcp_scr 390 }; 391 392 static const struct cp ipcp = { 393 PPP_IPCP, IDX_IPCP, 394 #ifdef INET 395 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 396 #else 397 0, 398 #endif 399 "ipcp", 400 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close, 401 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, 402 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf, 403 sppp_ipcp_scr 404 }; 405 406 static const struct cp ipv6cp = { 407 PPP_IPV6CP, IDX_IPV6CP, 408 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 409 CP_NCP, 410 #else 411 0, 412 #endif 413 "ipv6cp", 414 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close, 415 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak, 416 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf, 417 sppp_ipv6cp_scr 418 }; 419 420 static const struct cp pap = { 421 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 422 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close, 423 sppp_pap_TO, 0, 0, 0, 424 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null, 425 sppp_pap_scr 426 }; 427 428 static const struct cp chap = { 429 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 430 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close, 431 sppp_chap_TO, 0, 0, 0, 432 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null, 433 sppp_chap_scr 434 }; 435 436 static const struct cp *cps[IDX_COUNT] = { 437 &lcp, /* IDX_LCP */ 438 &ipcp, /* IDX_IPCP */ 439 &ipv6cp, /* IDX_IPV6CP */ 440 &pap, /* IDX_PAP */ 441 &chap, /* IDX_CHAP */ 442 }; 443 444 445 /* 446 * Exported functions, comprising our interface to the lower layer. 447 */ 448 449 /* 450 * Process the received packet. 451 */ 452 void 453 sppp_input(struct ifnet *ifp, struct mbuf *m) 454 { 455 struct ppp_header *h = NULL; 456 struct ifqueue *inq = 0; 457 u_int16_t protocol; 458 int s; 459 struct sppp *sp = (struct sppp *)ifp; 460 int debug = ifp->if_flags & IFF_DEBUG; 461 462 if (ifp->if_flags & IFF_UP) 463 /* Count received bytes, add hardware framing */ 464 ifp->if_ibytes += m->m_pkthdr.len + sp->pp_framebytes; 465 466 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 467 /* Too small packet, drop it. */ 468 if (debug) 469 log(LOG_DEBUG, 470 SPP_FMT "input packet is too small, %d bytes\n", 471 SPP_ARGS(ifp), m->m_pkthdr.len); 472 drop: 473 ++ifp->if_ierrors; 474 ++ifp->if_iqdrops; 475 m_freem (m); 476 return; 477 } 478 479 if (sp->pp_flags & PP_NOFRAMING) { 480 memcpy(&protocol, mtod(m, void *), 2); 481 protocol = ntohs(protocol); 482 m_adj(m, 2); 483 } else { 484 485 /* Get PPP header. */ 486 h = mtod (m, struct ppp_header*); 487 m_adj (m, PPP_HEADER_LEN); 488 489 switch (h->address) { 490 case PPP_ALLSTATIONS: 491 if (h->control != PPP_UI) 492 goto invalid; 493 if (sp->pp_flags & PP_CISCO) { 494 if (debug) 495 log(LOG_DEBUG, 496 SPP_FMT "PPP packet in Cisco mode " 497 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 498 SPP_ARGS(ifp), 499 h->address, h->control, ntohs(h->protocol)); 500 goto drop; 501 } 502 break; 503 case CISCO_MULTICAST: 504 case CISCO_UNICAST: 505 /* Don't check the control field here (RFC 1547). */ 506 if (! (sp->pp_flags & PP_CISCO)) { 507 if (debug) 508 log(LOG_DEBUG, 509 SPP_FMT "Cisco packet in PPP mode " 510 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 511 SPP_ARGS(ifp), 512 h->address, h->control, ntohs(h->protocol)); 513 goto drop; 514 } 515 switch (ntohs (h->protocol)) { 516 default: 517 ++ifp->if_noproto; 518 goto invalid; 519 case CISCO_KEEPALIVE: 520 sppp_cisco_input ((struct sppp*) ifp, m); 521 m_freem (m); 522 return; 523 #ifdef INET 524 case ETHERTYPE_IP: 525 schednetisr (NETISR_IP); 526 inq = &ipintrq; 527 break; 528 #endif 529 #ifdef INET6 530 case ETHERTYPE_IPV6: 531 schednetisr (NETISR_IPV6); 532 inq = &ip6intrq; 533 break; 534 #endif 535 #ifdef IPX 536 case ETHERTYPE_IPX: 537 schednetisr (NETISR_IPX); 538 inq = &ipxintrq; 539 break; 540 #endif 541 #ifdef NS 542 case ETHERTYPE_NS: 543 schednetisr (NETISR_NS); 544 inq = &nsintrq; 545 break; 546 #endif 547 } 548 goto queue_pkt; 549 default: /* Invalid PPP packet. */ 550 invalid: 551 if (debug) 552 log(LOG_DEBUG, 553 SPP_FMT "invalid input packet " 554 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 555 SPP_ARGS(ifp), 556 h->address, h->control, ntohs(h->protocol)); 557 goto drop; 558 } 559 protocol = ntohs (h->protocol); 560 } 561 562 switch (protocol) { 563 default: 564 if (sp->state[IDX_LCP] == STATE_OPENED) { 565 u_int16_t prot = htons(protocol); 566 sppp_cp_send (sp, PPP_LCP, PROTO_REJ, 567 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2, 568 &prot); 569 } 570 if (debug) 571 log(LOG_DEBUG, 572 SPP_FMT "invalid input protocol " 573 "<proto=0x%x>\n", SPP_ARGS(ifp), ntohs(protocol)); 574 ++ifp->if_noproto; 575 goto drop; 576 case PPP_LCP: 577 sppp_cp_input(&lcp, sp, m); 578 m_freem (m); 579 return; 580 case PPP_PAP: 581 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 582 sppp_pap_input(sp, m); 583 m_freem (m); 584 return; 585 case PPP_CHAP: 586 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 587 sppp_chap_input(sp, m); 588 m_freem (m); 589 return; 590 #ifdef INET 591 case PPP_IPCP: 592 if (sp->pp_phase == SPPP_PHASE_NETWORK) 593 sppp_cp_input(&ipcp, sp, m); 594 m_freem (m); 595 return; 596 case PPP_IP: 597 if (sp->state[IDX_IPCP] == STATE_OPENED) { 598 schednetisr (NETISR_IP); 599 inq = &ipintrq; 600 sp->pp_last_activity = time.tv_sec; 601 } 602 break; 603 #endif 604 #ifdef INET6 605 case PPP_IPV6CP: 606 if (sp->pp_phase == SPPP_PHASE_NETWORK) 607 sppp_cp_input(&ipv6cp, sp, m); 608 m_freem (m); 609 return; 610 611 case PPP_IPV6: 612 if (sp->state[IDX_IPV6CP] == STATE_OPENED) { 613 schednetisr (NETISR_IPV6); 614 inq = &ip6intrq; 615 sp->pp_last_activity = time.tv_sec; 616 } 617 break; 618 #endif 619 #ifdef IPX 620 case PPP_IPX: 621 /* IPX IPXCP not implemented yet */ 622 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 623 schednetisr (NETISR_IPX); 624 inq = &ipxintrq; 625 } 626 break; 627 #endif 628 #ifdef NS 629 case PPP_XNS: 630 /* XNS IDPCP not implemented yet */ 631 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 632 schednetisr (NETISR_NS); 633 inq = &nsintrq; 634 } 635 break; 636 #endif 637 #ifdef ISO 638 case PPP_ISO: 639 /* OSI NLCP not implemented yet */ 640 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 641 schednetisr (NETISR_ISO); 642 inq = &clnlintrq; 643 } 644 break; 645 #endif 646 } 647 648 queue_pkt: 649 if (! (ifp->if_flags & IFF_UP) || ! inq) 650 goto drop; 651 652 /* Check queue. */ 653 s = splnet(); 654 if (IF_QFULL (inq)) { 655 /* Queue overflow. */ 656 IF_DROP(inq); 657 splx(s); 658 if (debug) 659 log(LOG_DEBUG, SPP_FMT "protocol queue overflow\n", 660 SPP_ARGS(ifp)); 661 goto drop; 662 } 663 IF_ENQUEUE(inq, m); 664 splx(s); 665 } 666 667 /* 668 * Enqueue transmit packet. 669 */ 670 static int 671 sppp_output(struct ifnet *ifp, struct mbuf *m, 672 struct sockaddr *dst, struct rtentry *rt) 673 { 674 struct sppp *sp = (struct sppp*) ifp; 675 struct ppp_header *h = NULL; 676 struct ifqueue *ifq = NULL; /* XXX */ 677 int s, len, rv = 0; 678 u_int16_t protocol; 679 ALTQ_DECL(struct altq_pktattr pktattr;) 680 681 s = splnet(); 682 683 sp->pp_last_activity = time.tv_sec; 684 685 if ((ifp->if_flags & IFF_UP) == 0 || 686 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 687 m_freem (m); 688 splx (s); 689 return (ENETDOWN); 690 } 691 692 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 693 /* 694 * Interface is not yet running, but auto-dial. Need 695 * to start LCP for it. 696 */ 697 ifp->if_flags |= IFF_RUNNING; 698 splx(s); 699 lcp.Open(sp); 700 s = splnet(); 701 } 702 703 /* 704 * If the queueing discipline needs packet classification, 705 * do it before prepending link headers. 706 */ 707 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr); 708 709 #ifdef INET 710 if (dst->sa_family == AF_INET) 711 { 712 /* Check mbuf length here??? */ 713 struct ip *ip = mtod (m, struct ip*); 714 struct tcphdr *tcp = (struct tcphdr*) ((int32_t*)ip + ip->ip_hl); 715 716 /* 717 * When using dynamic local IP address assignment by using 718 * 0.0.0.0 as a local address, the first TCP session will 719 * not connect because the local TCP checksum is computed 720 * using 0.0.0.0 which will later become our real IP address 721 * so the TCP checksum computed at the remote end will 722 * become invalid. So we 723 * - don't let packets with src ip addr 0 thru 724 * - we flag TCP packets with src ip 0 as an error 725 */ 726 727 if(ip->ip_src.s_addr == INADDR_ANY) /* -hm */ 728 { 729 m_freem(m); 730 splx(s); 731 if(ip->ip_p == IPPROTO_TCP) 732 return(EADDRNOTAVAIL); 733 else 734 return(0); 735 } 736 737 /* 738 * Put low delay, telnet, rlogin and ftp control packets 739 * in front of the queue. 740 */ 741 742 if (! IF_QFULL (&sp->pp_fastq) && 743 ((ip->ip_tos & IPTOS_LOWDELAY) || 744 ((ip->ip_p == IPPROTO_TCP && 745 m->m_len >= sizeof (struct ip) + sizeof (struct tcphdr) && 746 (INTERACTIVE (ntohs (tcp->th_sport)))) || 747 INTERACTIVE (ntohs (tcp->th_dport))))) 748 ifq = &sp->pp_fastq; 749 } 750 #endif 751 752 #ifdef INET6 753 if (dst->sa_family == AF_INET6) { 754 /* XXX do something tricky here? */ 755 } 756 #endif 757 758 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 759 /* 760 * Prepend general data packet PPP header. For now, IP only. 761 */ 762 M_PREPEND (m, PPP_HEADER_LEN, M_DONTWAIT); 763 if (! m) { 764 if (ifp->if_flags & IFF_DEBUG) 765 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 766 SPP_ARGS(ifp)); 767 ++ifp->if_oerrors; 768 splx (s); 769 return (ENOBUFS); 770 } 771 /* 772 * May want to check size of packet 773 * (albeit due to the implementation it's always enough) 774 */ 775 h = mtod (m, struct ppp_header*); 776 if (sp->pp_flags & PP_CISCO) { 777 h->address = CISCO_UNICAST; /* unicast address */ 778 h->control = 0; 779 } else { 780 h->address = PPP_ALLSTATIONS; /* broadcast address */ 781 h->control = PPP_UI; /* Unnumbered Info */ 782 } 783 } 784 785 switch (dst->sa_family) { 786 #ifdef INET 787 case AF_INET: /* Internet Protocol */ 788 if (sp->pp_flags & PP_CISCO) 789 protocol = htons (ETHERTYPE_IP); 790 else { 791 /* 792 * Don't choke with an ENETDOWN early. It's 793 * possible that we just started dialing out, 794 * so don't drop the packet immediately. If 795 * we notice that we run out of buffer space 796 * below, we will however remember that we are 797 * not ready to carry IP packets, and return 798 * ENETDOWN, as opposed to ENOBUFS. 799 */ 800 protocol = htons(PPP_IP); 801 if (sp->state[IDX_IPCP] != STATE_OPENED) 802 rv = ENETDOWN; 803 } 804 break; 805 #endif 806 #ifdef INET6 807 case AF_INET6: /* Internet Protocol version 6 */ 808 if (sp->pp_flags & PP_CISCO) 809 protocol = htons (ETHERTYPE_IPV6); 810 else { 811 /* 812 * Don't choke with an ENETDOWN early. It's 813 * possible that we just started dialing out, 814 * so don't drop the packet immediately. If 815 * we notice that we run out of buffer space 816 * below, we will however remember that we are 817 * not ready to carry IP packets, and return 818 * ENETDOWN, as opposed to ENOBUFS. 819 */ 820 protocol = htons(PPP_IPV6); 821 if (sp->state[IDX_IPV6CP] != STATE_OPENED) 822 rv = ENETDOWN; 823 } 824 break; 825 #endif 826 #ifdef NS 827 case AF_NS: /* Xerox NS Protocol */ 828 protocol = htons ((sp->pp_flags & PP_CISCO) ? 829 ETHERTYPE_NS : PPP_XNS); 830 break; 831 #endif 832 #ifdef IPX 833 case AF_IPX: /* Novell IPX Protocol */ 834 protocol = htons ((sp->pp_flags & PP_CISCO) ? 835 ETHERTYPE_IPX : PPP_IPX); 836 break; 837 #endif 838 #ifdef ISO 839 case AF_ISO: /* ISO OSI Protocol */ 840 if (sp->pp_flags & PP_CISCO) 841 goto nosupport; 842 protocol = htons (PPP_ISO); 843 break; 844 nosupport: 845 #endif 846 default: 847 m_freem (m); 848 ++ifp->if_oerrors; 849 splx (s); 850 return (EAFNOSUPPORT); 851 } 852 853 if (sp->pp_flags & PP_NOFRAMING) { 854 M_PREPEND (m, 2, M_DONTWAIT); 855 if (m == NULL) { 856 if (ifp->if_flags & IFF_DEBUG) 857 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 858 SPP_ARGS(ifp)); 859 ++ifp->if_oerrors; 860 splx (s); 861 return (ENOBUFS); 862 } 863 *mtod(m, u_int16_t*) = protocol; 864 } else { 865 h->protocol = protocol; 866 } 867 868 /* 869 * Queue message on interface, and start output if interface 870 * not yet active. 871 */ 872 len = m->m_pkthdr.len; 873 if (ifq != NULL 874 #ifdef ALTQ 875 && ALTQ_IS_ENABLED(&ifp->if_snd) == 0 876 #endif 877 ) { 878 if (IF_QFULL (ifq)) { 879 IF_DROP (&ifp->if_snd); 880 m_freem (m); 881 if (rv == 0) 882 rv = ENOBUFS; 883 } 884 IF_ENQUEUE(ifq, m); 885 } else 886 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, rv); 887 if (rv != 0) { 888 ++ifp->if_oerrors; 889 splx(s); 890 return (rv); 891 } 892 893 if (! (ifp->if_flags & IFF_OACTIVE)) 894 (*ifp->if_start) (ifp); 895 896 /* 897 * Count output packets and bytes. 898 * The packet length includes header + additional hardware framing 899 * according to RFC 1333. 900 */ 901 ifp->if_obytes += len + sp->pp_framebytes; 902 splx (s); 903 return (0); 904 } 905 906 void 907 sppp_attach(struct ifnet *ifp) 908 { 909 struct sppp *sp = (struct sppp*) ifp; 910 911 /* Initialize keepalive handler. */ 912 if (! spppq) { 913 callout_init(&keepalive_ch); 914 callout_reset(&keepalive_ch, hz * 10, sppp_keepalive, NULL); 915 } 916 917 /* Insert new entry into the keepalive list. */ 918 sp->pp_next = spppq; 919 spppq = sp; 920 921 sp->pp_if.if_type = IFT_PPP; 922 sp->pp_if.if_output = sppp_output; 923 sp->pp_fastq.ifq_maxlen = 32; 924 sp->pp_cpq.ifq_maxlen = 20; 925 sp->pp_loopcnt = 0; 926 sp->pp_alivecnt = 0; 927 sp->pp_last_activity = 0; 928 sp->pp_idle_timeout = 0; 929 memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq)); 930 memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq)); 931 sp->pp_auth_failures = 0; 932 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 933 sp->pp_phase = SPPP_PHASE_DEAD; 934 sp->pp_up = lcp.Up; 935 sp->pp_down = lcp.Down; 936 937 if_alloc_sadl(ifp); 938 939 memset(&sp->myauth, 0, sizeof sp->myauth); 940 memset(&sp->hisauth, 0, sizeof sp->hisauth); 941 sppp_lcp_init(sp); 942 sppp_ipcp_init(sp); 943 sppp_ipv6cp_init(sp); 944 sppp_pap_init(sp); 945 sppp_chap_init(sp); 946 } 947 948 void 949 sppp_detach(struct ifnet *ifp) 950 { 951 struct sppp **q, *p, *sp = (struct sppp*) ifp; 952 int i; 953 954 /* Remove the entry from the keepalive list. */ 955 for (q = &spppq; (p = *q); q = &p->pp_next) 956 if (p == sp) { 957 *q = p->pp_next; 958 break; 959 } 960 961 /* Stop keepalive handler. */ 962 if (! spppq) { 963 callout_stop(&keepalive_ch); 964 } 965 966 for (i = 0; i < IDX_COUNT; i++) { 967 callout_stop(&sp->ch[i]); 968 } 969 callout_stop(&sp->pap_my_to_ch); 970 971 /* free authentication info */ 972 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 973 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 974 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 975 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 976 977 if_free_sadl(ifp); 978 } 979 980 /* 981 * Flush the interface output queue. 982 */ 983 void 984 sppp_flush(struct ifnet *ifp) 985 { 986 struct sppp *sp = (struct sppp*) ifp; 987 988 IFQ_PURGE (&sp->pp_if.if_snd); 989 IF_PURGE (&sp->pp_fastq); 990 IF_PURGE (&sp->pp_cpq); 991 } 992 993 /* 994 * Check if the output queue is empty. 995 */ 996 int 997 sppp_isempty(struct ifnet *ifp) 998 { 999 struct sppp *sp = (struct sppp*) ifp; 1000 int empty, s; 1001 1002 s = splnet(); 1003 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1004 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1005 splx(s); 1006 return (empty); 1007 } 1008 1009 /* 1010 * Get next packet to send. 1011 */ 1012 struct mbuf * 1013 sppp_dequeue(struct ifnet *ifp) 1014 { 1015 struct sppp *sp = (struct sppp*) ifp; 1016 struct mbuf *m; 1017 int s; 1018 1019 s = splnet(); 1020 /* 1021 * Process only the control protocol queue until we have at 1022 * least one NCP open. 1023 * 1024 * Do always serve all three queues in Cisco mode. 1025 */ 1026 IF_DEQUEUE(&sp->pp_cpq, m); 1027 if (m == NULL && 1028 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1029 IF_DEQUEUE(&sp->pp_fastq, m); 1030 if (m == NULL) 1031 IF_DEQUEUE (&sp->pp_if.if_snd, m); 1032 } 1033 splx(s); 1034 return m; 1035 } 1036 1037 /* 1038 * Pick the next packet, do not remove it from the queue. 1039 */ 1040 struct mbuf * 1041 sppp_pick(struct ifnet *ifp) 1042 { 1043 struct sppp *sp = (struct sppp*)ifp; 1044 struct mbuf *m; 1045 int s; 1046 1047 s= splnet (); 1048 1049 m = sp->pp_cpq.ifq_head; 1050 if (m == NULL && 1051 (sp->pp_phase == SPPP_PHASE_NETWORK || 1052 (sp->pp_flags & PP_CISCO) != 0)) 1053 if ((m = sp->pp_fastq.ifq_head) == NULL) 1054 m = sp->pp_if.if_snd.ifq_head; 1055 splx (s); 1056 return (m); 1057 } 1058 1059 /* 1060 * Process an ioctl request. Called on low priority level. 1061 */ 1062 int 1063 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1064 { 1065 struct ifreq *ifr = (struct ifreq*) data; 1066 struct sppp *sp = (struct sppp*) ifp; 1067 int s, error=0, going_up, going_down, newmode; 1068 1069 s = splnet(); 1070 switch (cmd) { 1071 case SIOCAIFADDR: 1072 case SIOCSIFDSTADDR: 1073 break; 1074 1075 case SIOCSIFADDR: 1076 if_up(ifp); 1077 /* fall through... */ 1078 1079 case SIOCSIFFLAGS: 1080 going_up = ifp->if_flags & IFF_UP && 1081 (ifp->if_flags & IFF_RUNNING) == 0; 1082 going_down = (ifp->if_flags & IFF_UP) == 0 && 1083 ifp->if_flags & IFF_RUNNING; 1084 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1085 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1086 /* sanity */ 1087 newmode = IFF_PASSIVE; 1088 ifp->if_flags &= ~IFF_AUTO; 1089 } 1090 1091 if (going_up || going_down) 1092 lcp.Close(sp); 1093 if (going_up && newmode == 0) { 1094 /* neither auto-dial nor passive */ 1095 ifp->if_flags |= IFF_RUNNING; 1096 if (!(sp->pp_flags & PP_CISCO)) 1097 lcp.Open(sp); 1098 } else if (going_down) { 1099 sppp_flush(ifp); 1100 ifp->if_flags &= ~IFF_RUNNING; 1101 } 1102 1103 break; 1104 1105 #ifdef SIOCSIFMTU 1106 #ifndef ifr_mtu 1107 #define ifr_mtu ifr_metric 1108 #endif 1109 case SIOCSIFMTU: 1110 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru) 1111 return (EINVAL); 1112 ifp->if_mtu = ifr->ifr_mtu; 1113 break; 1114 #endif 1115 #ifdef SLIOCSETMTU 1116 case SLIOCSETMTU: 1117 if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru) 1118 return (EINVAL); 1119 ifp->if_mtu = *(short*)data; 1120 break; 1121 #endif 1122 #ifdef SIOCGIFMTU 1123 case SIOCGIFMTU: 1124 ifr->ifr_mtu = ifp->if_mtu; 1125 break; 1126 #endif 1127 #ifdef SLIOCGETMTU 1128 case SLIOCGETMTU: 1129 *(short*)data = ifp->if_mtu; 1130 break; 1131 #endif 1132 case SIOCADDMULTI: 1133 case SIOCDELMULTI: 1134 break; 1135 1136 case SPPPSETAUTHCFG: 1137 case SPPPSETLCPCFG: 1138 case SPPPSETIDLETO: 1139 case SPPPSETAUTHFAILURE: 1140 case SPPPSETDNSOPTS: 1141 { 1142 struct proc *p = curproc; /* XXX */ 1143 1144 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1145 break; 1146 } 1147 /* FALLTHROUGH */ 1148 case SPPPGETAUTHCFG: 1149 case SPPPGETLCPCFG: 1150 case SPPPGETSTATUS: 1151 case SPPPGETIDLETO: 1152 case SPPPGETAUTHFAILURES: 1153 case SPPPGETDNSOPTS: 1154 case SPPPGETDNSADDRS: 1155 error = sppp_params(sp, cmd, data); 1156 break; 1157 1158 default: 1159 error = ENOTTY; 1160 } 1161 splx(s); 1162 return (error); 1163 } 1164 1165 1166 /* 1167 * Cisco framing implementation. 1168 */ 1169 1170 /* 1171 * Handle incoming Cisco keepalive protocol packets. 1172 */ 1173 static void 1174 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1175 { 1176 STDDCL; 1177 struct cisco_packet *h; 1178 u_int32_t me, mymask; 1179 1180 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1181 if (debug) 1182 log(LOG_DEBUG, 1183 SPP_FMT "cisco invalid packet length: %d bytes\n", 1184 SPP_ARGS(ifp), m->m_pkthdr.len); 1185 return; 1186 } 1187 h = mtod (m, struct cisco_packet*); 1188 if (debug) 1189 log(LOG_DEBUG, 1190 SPP_FMT "cisco input: %d bytes " 1191 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1192 SPP_ARGS(ifp), m->m_pkthdr.len, 1193 ntohl (h->type), h->par1, h->par2, (u_int)h->rel, 1194 (u_int)h->time0, (u_int)h->time1); 1195 switch (ntohl (h->type)) { 1196 default: 1197 if (debug) 1198 addlog(SPP_FMT "cisco unknown packet type: 0x%x\n", 1199 SPP_ARGS(ifp), ntohl (h->type)); 1200 break; 1201 case CISCO_ADDR_REPLY: 1202 /* Reply on address request, ignore */ 1203 break; 1204 case CISCO_KEEPALIVE_REQ: 1205 sp->pp_alivecnt = 0; 1206 sp->pp_rseq[IDX_LCP] = ntohl (h->par1); 1207 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1208 /* Local and remote sequence numbers are equal. 1209 * Probably, the line is in loopback mode. */ 1210 if (sp->pp_loopcnt >= MAXALIVECNT) { 1211 printf (SPP_FMT "loopback\n", 1212 SPP_ARGS(ifp)); 1213 sp->pp_loopcnt = 0; 1214 if (ifp->if_flags & IFF_UP) { 1215 if_down (ifp); 1216 IF_PURGE (&sp->pp_cpq); 1217 } 1218 } 1219 ++sp->pp_loopcnt; 1220 1221 /* Generate new local sequence number */ 1222 sp->pp_seq[IDX_LCP] = random(); 1223 break; 1224 } 1225 sp->pp_loopcnt = 0; 1226 if (! (ifp->if_flags & IFF_UP) && 1227 (ifp->if_flags & IFF_RUNNING)) { 1228 if_up(ifp); 1229 } 1230 break; 1231 case CISCO_ADDR_REQ: 1232 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1233 if (me != 0L) 1234 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1235 break; 1236 } 1237 } 1238 1239 /* 1240 * Send Cisco keepalive packet. 1241 */ 1242 static void 1243 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1244 { 1245 STDDCL; 1246 struct ppp_header *h; 1247 struct cisco_packet *ch; 1248 struct mbuf *m; 1249 u_int32_t t = (time.tv_sec - boottime.tv_sec) * 1000; 1250 1251 MGETHDR (m, M_DONTWAIT, MT_DATA); 1252 if (! m) 1253 return; 1254 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1255 m->m_pkthdr.rcvif = 0; 1256 1257 h = mtod (m, struct ppp_header*); 1258 h->address = CISCO_MULTICAST; 1259 h->control = 0; 1260 h->protocol = htons (CISCO_KEEPALIVE); 1261 1262 ch = (struct cisco_packet*) (h + 1); 1263 ch->type = htonl (type); 1264 ch->par1 = htonl (par1); 1265 ch->par2 = htonl (par2); 1266 ch->rel = -1; 1267 1268 ch->time0 = htons ((u_short) (t >> 16)); 1269 ch->time1 = htons ((u_short) t); 1270 1271 if (debug) 1272 log(LOG_DEBUG, 1273 SPP_FMT "cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1274 SPP_ARGS(ifp), ntohl (ch->type), ch->par1, 1275 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1276 (u_int)ch->time1); 1277 1278 if (IF_QFULL (&sp->pp_cpq)) { 1279 IF_DROP (&sp->pp_fastq); 1280 IF_DROP (&ifp->if_snd); 1281 m_freem (m); 1282 } else 1283 IF_ENQUEUE (&sp->pp_cpq, m); 1284 if (! (ifp->if_flags & IFF_OACTIVE)) 1285 (*ifp->if_start) (ifp); 1286 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1287 } 1288 1289 /* 1290 * PPP protocol implementation. 1291 */ 1292 1293 /* 1294 * Send PPP control protocol packet. 1295 */ 1296 static void 1297 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1298 u_char ident, u_short len, void *data) 1299 { 1300 STDDCL; 1301 struct lcp_header *lh; 1302 struct mbuf *m; 1303 size_t pkthdrlen; 1304 1305 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1306 1307 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1308 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1309 MGETHDR (m, M_DONTWAIT, MT_DATA); 1310 if (! m) 1311 return; 1312 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1313 m->m_pkthdr.rcvif = 0; 1314 1315 if (sp->pp_flags & PP_NOFRAMING) { 1316 *mtod(m, u_int16_t*) = htons(proto); 1317 lh = (struct lcp_header*)(mtod(m, u_int8_t*) + 2); 1318 } else { 1319 struct ppp_header *h; 1320 h = mtod (m, struct ppp_header*); 1321 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1322 h->control = PPP_UI; /* Unnumbered Info */ 1323 h->protocol = htons (proto); /* Link Control Protocol */ 1324 lh = (struct lcp_header*) (h + 1); 1325 } 1326 lh->type = type; 1327 lh->ident = ident; 1328 lh->len = htons (LCP_HEADER_LEN + len); 1329 if (len) 1330 bcopy (data, lh+1, len); 1331 1332 if (debug) { 1333 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 1334 SPP_ARGS(ifp), 1335 sppp_proto_name(proto), 1336 sppp_cp_type_name (lh->type), lh->ident, 1337 ntohs (lh->len)); 1338 if (len) 1339 sppp_print_bytes ((u_char*) (lh+1), len); 1340 addlog(">\n"); 1341 } 1342 if (IF_QFULL (&sp->pp_cpq)) { 1343 IF_DROP (&sp->pp_fastq); 1344 IF_DROP (&ifp->if_snd); 1345 m_freem (m); 1346 ++ifp->if_oerrors; 1347 } else 1348 IF_ENQUEUE (&sp->pp_cpq, m); 1349 if (! (ifp->if_flags & IFF_OACTIVE)) 1350 (*ifp->if_start) (ifp); 1351 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1352 } 1353 1354 /* 1355 * Handle incoming PPP control protocol packets. 1356 */ 1357 static void 1358 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1359 { 1360 STDDCL; 1361 struct lcp_header *h; 1362 int len = m->m_pkthdr.len; 1363 int rv; 1364 u_char *p; 1365 u_int32_t u32; 1366 1367 if (len < 4) { 1368 if (debug) 1369 log(LOG_DEBUG, 1370 SPP_FMT "%s invalid packet length: %d bytes\n", 1371 SPP_ARGS(ifp), cp->name, len); 1372 return; 1373 } 1374 h = mtod (m, struct lcp_header*); 1375 if (debug) { 1376 log(LOG_DEBUG, 1377 SPP_FMT "%s input(%s): <%s id=0x%x len=%d", 1378 SPP_ARGS(ifp), cp->name, 1379 sppp_state_name(sp->state[cp->protoidx]), 1380 sppp_cp_type_name (h->type), h->ident, ntohs (h->len)); 1381 if (len > 4) 1382 sppp_print_bytes ((u_char*) (h+1), len-4); 1383 addlog(">\n"); 1384 } 1385 if (len > ntohs (h->len)) 1386 len = ntohs (h->len); 1387 p = (u_char *)(h + 1); 1388 switch (h->type) { 1389 case CONF_REQ: 1390 if (len < 4) { 1391 if (debug) 1392 addlog(SPP_FMT "%s invalid conf-req length %d\n", 1393 SPP_ARGS(ifp), cp->name, 1394 len); 1395 ++ifp->if_ierrors; 1396 break; 1397 } 1398 /* handle states where RCR doesn't get a SCA/SCN */ 1399 switch (sp->state[cp->protoidx]) { 1400 case STATE_CLOSING: 1401 case STATE_STOPPING: 1402 return; 1403 case STATE_CLOSED: 1404 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1405 0, 0); 1406 return; 1407 } 1408 rv = (cp->RCR)(sp, h, len); 1409 switch (sp->state[cp->protoidx]) { 1410 case STATE_OPENED: 1411 (cp->tld)(sp); 1412 (cp->scr)(sp); 1413 /* fall through... */ 1414 case STATE_ACK_SENT: 1415 case STATE_REQ_SENT: 1416 sppp_cp_change_state(cp, sp, rv? 1417 STATE_ACK_SENT: STATE_REQ_SENT); 1418 break; 1419 case STATE_STOPPED: 1420 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1421 (cp->scr)(sp); 1422 sppp_cp_change_state(cp, sp, rv? 1423 STATE_ACK_SENT: STATE_REQ_SENT); 1424 break; 1425 case STATE_ACK_RCVD: 1426 if (rv) { 1427 sppp_cp_change_state(cp, sp, STATE_OPENED); 1428 if (debug) 1429 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1430 SPP_ARGS(ifp), 1431 cp->name); 1432 (cp->tlu)(sp); 1433 } else 1434 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1435 break; 1436 default: 1437 printf(SPP_FMT "%s illegal %s in state %s\n", 1438 SPP_ARGS(ifp), cp->name, 1439 sppp_cp_type_name(h->type), 1440 sppp_state_name(sp->state[cp->protoidx])); 1441 ++ifp->if_ierrors; 1442 } 1443 break; 1444 case CONF_ACK: 1445 if (h->ident != sp->confid[cp->protoidx]) { 1446 if (debug) 1447 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1448 SPP_ARGS(ifp), cp->name, 1449 h->ident, sp->confid[cp->protoidx]); 1450 ++ifp->if_ierrors; 1451 break; 1452 } 1453 switch (sp->state[cp->protoidx]) { 1454 case STATE_CLOSED: 1455 case STATE_STOPPED: 1456 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1457 break; 1458 case STATE_CLOSING: 1459 case STATE_STOPPING: 1460 break; 1461 case STATE_REQ_SENT: 1462 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1463 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1464 break; 1465 case STATE_OPENED: 1466 (cp->tld)(sp); 1467 /* fall through */ 1468 case STATE_ACK_RCVD: 1469 (cp->scr)(sp); 1470 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1471 break; 1472 case STATE_ACK_SENT: 1473 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1474 sppp_cp_change_state(cp, sp, STATE_OPENED); 1475 if (debug) 1476 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1477 SPP_ARGS(ifp), cp->name); 1478 (cp->tlu)(sp); 1479 break; 1480 default: 1481 printf(SPP_FMT "%s illegal %s in state %s\n", 1482 SPP_ARGS(ifp), cp->name, 1483 sppp_cp_type_name(h->type), 1484 sppp_state_name(sp->state[cp->protoidx])); 1485 ++ifp->if_ierrors; 1486 } 1487 break; 1488 case CONF_NAK: 1489 case CONF_REJ: 1490 if (h->ident != sp->confid[cp->protoidx]) { 1491 if (debug) 1492 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1493 SPP_ARGS(ifp), cp->name, 1494 h->ident, sp->confid[cp->protoidx]); 1495 ++ifp->if_ierrors; 1496 break; 1497 } 1498 if (h->type == CONF_NAK) 1499 (cp->RCN_nak)(sp, h, len); 1500 else /* CONF_REJ */ 1501 (cp->RCN_rej)(sp, h, len); 1502 1503 switch (sp->state[cp->protoidx]) { 1504 case STATE_CLOSED: 1505 case STATE_STOPPED: 1506 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1507 break; 1508 case STATE_REQ_SENT: 1509 case STATE_ACK_SENT: 1510 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1511 (cp->scr)(sp); 1512 break; 1513 case STATE_OPENED: 1514 (cp->tld)(sp); 1515 /* fall through */ 1516 case STATE_ACK_RCVD: 1517 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1518 (cp->scr)(sp); 1519 break; 1520 case STATE_CLOSING: 1521 case STATE_STOPPING: 1522 break; 1523 default: 1524 printf(SPP_FMT "%s illegal %s in state %s\n", 1525 SPP_ARGS(ifp), cp->name, 1526 sppp_cp_type_name(h->type), 1527 sppp_state_name(sp->state[cp->protoidx])); 1528 ++ifp->if_ierrors; 1529 } 1530 break; 1531 1532 case TERM_REQ: 1533 switch (sp->state[cp->protoidx]) { 1534 case STATE_ACK_RCVD: 1535 case STATE_ACK_SENT: 1536 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1537 /* fall through */ 1538 case STATE_CLOSED: 1539 case STATE_STOPPED: 1540 case STATE_CLOSING: 1541 case STATE_STOPPING: 1542 case STATE_REQ_SENT: 1543 sta: 1544 /* Send Terminate-Ack packet. */ 1545 if (debug) 1546 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n", 1547 SPP_ARGS(ifp), cp->name); 1548 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1549 break; 1550 case STATE_OPENED: 1551 (cp->tld)(sp); 1552 sp->rst_counter[cp->protoidx] = 0; 1553 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1554 goto sta; 1555 break; 1556 default: 1557 printf(SPP_FMT "%s illegal %s in state %s\n", 1558 SPP_ARGS(ifp), cp->name, 1559 sppp_cp_type_name(h->type), 1560 sppp_state_name(sp->state[cp->protoidx])); 1561 ++ifp->if_ierrors; 1562 } 1563 break; 1564 case TERM_ACK: 1565 switch (sp->state[cp->protoidx]) { 1566 case STATE_CLOSED: 1567 case STATE_STOPPED: 1568 case STATE_REQ_SENT: 1569 case STATE_ACK_SENT: 1570 break; 1571 case STATE_CLOSING: 1572 (cp->tlf)(sp); 1573 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1574 sppp_lcp_check_and_close(sp); 1575 break; 1576 case STATE_STOPPING: 1577 (cp->tlf)(sp); 1578 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1579 sppp_lcp_check_and_close(sp); 1580 break; 1581 case STATE_ACK_RCVD: 1582 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1583 break; 1584 case STATE_OPENED: 1585 (cp->tld)(sp); 1586 (cp->scr)(sp); 1587 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1588 break; 1589 default: 1590 printf(SPP_FMT "%s illegal %s in state %s\n", 1591 SPP_ARGS(ifp), cp->name, 1592 sppp_cp_type_name(h->type), 1593 sppp_state_name(sp->state[cp->protoidx])); 1594 ++ifp->if_ierrors; 1595 } 1596 break; 1597 case CODE_REJ: 1598 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1599 log(LOG_INFO, 1600 SPP_FMT "%s: ignoring RXJ (%s) for code ?, " 1601 "danger will robinson\n", 1602 SPP_ARGS(ifp), cp->name, 1603 sppp_cp_type_name(h->type)); 1604 switch (sp->state[cp->protoidx]) { 1605 case STATE_CLOSED: 1606 case STATE_STOPPED: 1607 case STATE_REQ_SENT: 1608 case STATE_ACK_SENT: 1609 case STATE_CLOSING: 1610 case STATE_STOPPING: 1611 case STATE_OPENED: 1612 break; 1613 case STATE_ACK_RCVD: 1614 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1615 break; 1616 default: 1617 printf(SPP_FMT "%s illegal %s in state %s\n", 1618 SPP_ARGS(ifp), cp->name, 1619 sppp_cp_type_name(h->type), 1620 sppp_state_name(sp->state[cp->protoidx])); 1621 ++ifp->if_ierrors; 1622 } 1623 break; 1624 case PROTO_REJ: 1625 { 1626 int catastrophic; 1627 const struct cp *upper; 1628 int i; 1629 u_int16_t proto; 1630 1631 catastrophic = 0; 1632 upper = NULL; 1633 proto = p[0] << 8 | p[1]; 1634 for (i = 0; i < IDX_COUNT; i++) { 1635 if (cps[i]->proto == proto) { 1636 upper = cps[i]; 1637 break; 1638 } 1639 } 1640 if (upper == NULL) 1641 catastrophic++; 1642 1643 if (debug) 1644 log(LOG_INFO, 1645 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1646 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+', 1647 sppp_cp_type_name(h->type), proto, 1648 upper ? upper->name : "unknown", 1649 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1650 1651 /* 1652 * if we got RXJ+ against conf-req, the peer does not implement 1653 * this particular protocol type. terminate the protocol. 1654 */ 1655 if (upper && !catastrophic) { 1656 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1657 upper->Close(sp); 1658 break; 1659 } 1660 } 1661 1662 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1663 switch (sp->state[cp->protoidx]) { 1664 case STATE_CLOSED: 1665 case STATE_STOPPED: 1666 case STATE_REQ_SENT: 1667 case STATE_ACK_SENT: 1668 case STATE_CLOSING: 1669 case STATE_STOPPING: 1670 case STATE_OPENED: 1671 break; 1672 case STATE_ACK_RCVD: 1673 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1674 break; 1675 default: 1676 printf(SPP_FMT "%s illegal %s in state %s\n", 1677 SPP_ARGS(ifp), cp->name, 1678 sppp_cp_type_name(h->type), 1679 sppp_state_name(sp->state[cp->protoidx])); 1680 ++ifp->if_ierrors; 1681 } 1682 break; 1683 } 1684 case DISC_REQ: 1685 if (cp->proto != PPP_LCP) 1686 goto illegal; 1687 /* Discard the packet. */ 1688 break; 1689 case ECHO_REQ: 1690 if (cp->proto != PPP_LCP) 1691 goto illegal; 1692 if (sp->state[cp->protoidx] != STATE_OPENED) { 1693 if (debug) 1694 addlog(SPP_FMT "lcp echo req but lcp closed\n", 1695 SPP_ARGS(ifp)); 1696 ++ifp->if_ierrors; 1697 break; 1698 } 1699 if (len < 8) { 1700 if (debug) 1701 addlog(SPP_FMT "invalid lcp echo request " 1702 "packet length: %d bytes\n", 1703 SPP_ARGS(ifp), len); 1704 break; 1705 } 1706 memcpy(&u32, h + 1, sizeof u32); 1707 if (ntohl(u32) == sp->lcp.magic) { 1708 /* Line loopback mode detected. */ 1709 printf(SPP_FMT "loopback\n", SPP_ARGS(ifp)); 1710 if_down (ifp); 1711 IF_PURGE (&sp->pp_cpq); 1712 1713 /* Shut down the PPP link. */ 1714 /* XXX */ 1715 lcp.Down(sp); 1716 lcp.Up(sp); 1717 break; 1718 } 1719 u32 = htonl(sp->lcp.magic); 1720 memcpy(h + 1, &u32, sizeof u32); 1721 if (debug) 1722 addlog(SPP_FMT "got lcp echo req, sending echo rep\n", 1723 SPP_ARGS(ifp)); 1724 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1); 1725 break; 1726 case ECHO_REPLY: 1727 if (cp->proto != PPP_LCP) 1728 goto illegal; 1729 if (h->ident != sp->lcp.echoid) { 1730 ++ifp->if_ierrors; 1731 break; 1732 } 1733 if (len < 8) { 1734 if (debug) 1735 addlog(SPP_FMT "lcp invalid echo reply " 1736 "packet length: %d bytes\n", 1737 SPP_ARGS(ifp), len); 1738 break; 1739 } 1740 if (debug) 1741 addlog(SPP_FMT "lcp got echo rep\n", 1742 SPP_ARGS(ifp)); 1743 memcpy(&u32, h + 1, sizeof u32); 1744 if (ntohl(u32) != sp->lcp.magic) 1745 sp->pp_alivecnt = 0; 1746 break; 1747 default: 1748 /* Unknown packet type -- send Code-Reject packet. */ 1749 illegal: 1750 if (debug) 1751 addlog(SPP_FMT "%s send code-rej for 0x%x\n", 1752 SPP_ARGS(ifp), cp->name, h->type); 1753 sppp_cp_send(sp, cp->proto, CODE_REJ, 1754 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1755 ++ifp->if_ierrors; 1756 } 1757 } 1758 1759 1760 /* 1761 * The generic part of all Up/Down/Open/Close/TO event handlers. 1762 * Basically, the state transition handling in the automaton. 1763 */ 1764 static void 1765 sppp_up_event(const struct cp *cp, struct sppp *sp) 1766 { 1767 STDDCL; 1768 1769 if (debug) 1770 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n", 1771 SPP_ARGS(ifp), cp->name, 1772 sppp_state_name(sp->state[cp->protoidx])); 1773 1774 switch (sp->state[cp->protoidx]) { 1775 case STATE_INITIAL: 1776 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1777 break; 1778 case STATE_STARTING: 1779 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1780 (cp->scr)(sp); 1781 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1782 break; 1783 default: 1784 printf(SPP_FMT "%s illegal up in state %s\n", 1785 SPP_ARGS(ifp), cp->name, 1786 sppp_state_name(sp->state[cp->protoidx])); 1787 } 1788 } 1789 1790 static void 1791 sppp_down_event(const struct cp *cp, struct sppp *sp) 1792 { 1793 STDDCL; 1794 1795 if (debug) 1796 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n", 1797 SPP_ARGS(ifp), cp->name, 1798 sppp_state_name(sp->state[cp->protoidx])); 1799 1800 switch (sp->state[cp->protoidx]) { 1801 case STATE_CLOSED: 1802 case STATE_CLOSING: 1803 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1804 break; 1805 case STATE_STOPPED: 1806 (cp->tls)(sp); 1807 /* fall through */ 1808 case STATE_STOPPING: 1809 case STATE_REQ_SENT: 1810 case STATE_ACK_RCVD: 1811 case STATE_ACK_SENT: 1812 sppp_cp_change_state(cp, sp, STATE_STARTING); 1813 break; 1814 case STATE_OPENED: 1815 (cp->tld)(sp); 1816 sppp_cp_change_state(cp, sp, STATE_STARTING); 1817 break; 1818 default: 1819 printf(SPP_FMT "%s illegal down in state %s\n", 1820 SPP_ARGS(ifp), cp->name, 1821 sppp_state_name(sp->state[cp->protoidx])); 1822 } 1823 } 1824 1825 1826 static void 1827 sppp_open_event(const struct cp *cp, struct sppp *sp) 1828 { 1829 STDDCL; 1830 1831 if (debug) 1832 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n", 1833 SPP_ARGS(ifp), cp->name, 1834 sppp_state_name(sp->state[cp->protoidx])); 1835 1836 switch (sp->state[cp->protoidx]) { 1837 case STATE_INITIAL: 1838 (cp->tls)(sp); 1839 sppp_cp_change_state(cp, sp, STATE_STARTING); 1840 break; 1841 case STATE_STARTING: 1842 break; 1843 case STATE_CLOSED: 1844 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1845 (cp->scr)(sp); 1846 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1847 break; 1848 case STATE_STOPPED: 1849 case STATE_STOPPING: 1850 case STATE_REQ_SENT: 1851 case STATE_ACK_RCVD: 1852 case STATE_ACK_SENT: 1853 case STATE_OPENED: 1854 break; 1855 case STATE_CLOSING: 1856 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1857 break; 1858 } 1859 } 1860 1861 1862 static void 1863 sppp_close_event(const struct cp *cp, struct sppp *sp) 1864 { 1865 STDDCL; 1866 1867 if (debug) 1868 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n", 1869 SPP_ARGS(ifp), cp->name, 1870 sppp_state_name(sp->state[cp->protoidx])); 1871 1872 switch (sp->state[cp->protoidx]) { 1873 case STATE_INITIAL: 1874 case STATE_CLOSED: 1875 case STATE_CLOSING: 1876 break; 1877 case STATE_STARTING: 1878 (cp->tlf)(sp); 1879 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1880 break; 1881 case STATE_STOPPED: 1882 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1883 break; 1884 case STATE_STOPPING: 1885 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1886 break; 1887 case STATE_OPENED: 1888 (cp->tld)(sp); 1889 /* fall through */ 1890 case STATE_REQ_SENT: 1891 case STATE_ACK_RCVD: 1892 case STATE_ACK_SENT: 1893 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 1894 sppp_cp_send(sp, cp->proto, TERM_REQ, 1895 ++sp->pp_seq[cp->protoidx], 0, 0); 1896 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1897 break; 1898 } 1899 } 1900 1901 static void 1902 sppp_to_event(const struct cp *cp, struct sppp *sp) 1903 { 1904 STDDCL; 1905 int s; 1906 1907 s = splnet(); 1908 if (debug) 1909 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n", 1910 SPP_ARGS(ifp), cp->name, 1911 sppp_state_name(sp->state[cp->protoidx]), 1912 sp->rst_counter[cp->protoidx]); 1913 1914 if (--sp->rst_counter[cp->protoidx] < 0) 1915 /* TO- event */ 1916 switch (sp->state[cp->protoidx]) { 1917 case STATE_CLOSING: 1918 (cp->tlf)(sp); 1919 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1920 sppp_lcp_check_and_close(sp); 1921 break; 1922 case STATE_STOPPING: 1923 (cp->tlf)(sp); 1924 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1925 sppp_lcp_check_and_close(sp); 1926 break; 1927 case STATE_REQ_SENT: 1928 case STATE_ACK_RCVD: 1929 case STATE_ACK_SENT: 1930 (cp->tlf)(sp); 1931 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1932 sppp_lcp_check_and_close(sp); 1933 break; 1934 } 1935 else 1936 /* TO+ event */ 1937 switch (sp->state[cp->protoidx]) { 1938 case STATE_CLOSING: 1939 case STATE_STOPPING: 1940 sppp_cp_send(sp, cp->proto, TERM_REQ, 1941 ++sp->pp_seq[cp->protoidx], 0, 0); 1942 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1943 cp->TO, sp); 1944 break; 1945 case STATE_REQ_SENT: 1946 case STATE_ACK_RCVD: 1947 (cp->scr)(sp); 1948 /* sppp_cp_change_state() will restart the timer */ 1949 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1950 break; 1951 case STATE_ACK_SENT: 1952 (cp->scr)(sp); 1953 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1954 cp->TO, sp); 1955 break; 1956 } 1957 1958 splx(s); 1959 } 1960 1961 /* 1962 * Change the state of a control protocol in the state automaton. 1963 * Takes care of starting/stopping the restart timer. 1964 */ 1965 void 1966 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 1967 { 1968 sp->state[cp->protoidx] = newstate; 1969 callout_stop(&sp->ch[cp->protoidx]); 1970 switch (newstate) { 1971 case STATE_INITIAL: 1972 case STATE_STARTING: 1973 case STATE_CLOSED: 1974 case STATE_STOPPED: 1975 case STATE_OPENED: 1976 break; 1977 case STATE_CLOSING: 1978 case STATE_STOPPING: 1979 case STATE_REQ_SENT: 1980 case STATE_ACK_RCVD: 1981 case STATE_ACK_SENT: 1982 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1983 cp->TO, sp); 1984 break; 1985 } 1986 } 1987 1988 /* 1989 *--------------------------------------------------------------------------* 1990 * * 1991 * The LCP implementation. * 1992 * * 1993 *--------------------------------------------------------------------------* 1994 */ 1995 static void 1996 sppp_lcp_init(struct sppp *sp) 1997 { 1998 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 1999 sp->lcp.magic = 0; 2000 sp->state[IDX_LCP] = STATE_INITIAL; 2001 sp->fail_counter[IDX_LCP] = 0; 2002 sp->pp_seq[IDX_LCP] = 0; 2003 sp->pp_rseq[IDX_LCP] = 0; 2004 sp->lcp.protos = 0; 2005 sp->lcp.mru = sp->lcp.their_mru = PP_MTU; 2006 2007 /* 2008 * Initialize counters and timeout values. Note that we don't 2009 * use the 3 seconds suggested in RFC 1661 since we are likely 2010 * running on a fast link. XXX We should probably implement 2011 * the exponential backoff option. Note that these values are 2012 * relevant for all control protocols, not just LCP only. 2013 */ 2014 sp->lcp.timeout = 1 * hz; 2015 sp->lcp.max_terminate = 2; 2016 sp->lcp.max_configure = 10; 2017 sp->lcp.max_failure = 10; 2018 callout_init(&sp->ch[IDX_LCP]); 2019 } 2020 2021 static void 2022 sppp_lcp_up(struct sppp *sp) 2023 { 2024 STDDCL; 2025 2026 /* Initialize activity timestamp: opening a connection is an activity */ 2027 sp->pp_last_activity = time.tv_sec; 2028 2029 /* 2030 * If this interface is passive or dial-on-demand, and we are 2031 * still in Initial state, it means we've got an incoming 2032 * call. Activate the interface. 2033 */ 2034 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2035 if (debug) 2036 log(LOG_DEBUG, 2037 SPP_FMT "Up event", SPP_ARGS(ifp)); 2038 ifp->if_flags |= IFF_RUNNING; 2039 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2040 if (debug) 2041 addlog("(incoming call)\n"); 2042 sp->pp_flags |= PP_CALLIN; 2043 lcp.Open(sp); 2044 } else if (debug) 2045 addlog("\n"); 2046 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && 2047 (sp->state[IDX_LCP] == STATE_INITIAL)) { 2048 ifp->if_flags |= IFF_RUNNING; 2049 lcp.Open(sp); 2050 } 2051 2052 sppp_up_event(&lcp, sp); 2053 } 2054 2055 static void 2056 sppp_lcp_down(struct sppp *sp) 2057 { 2058 STDDCL; 2059 2060 sppp_down_event(&lcp, sp); 2061 2062 /* 2063 * If this is neither a dial-on-demand nor a passive 2064 * interface, simulate an ``ifconfig down'' action, so the 2065 * administrator can force a redial by another ``ifconfig 2066 * up''. XXX For leased line operation, should we immediately 2067 * try to reopen the connection here? 2068 */ 2069 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2070 if (debug) 2071 log(LOG_INFO, 2072 SPP_FMT "Down event (carrier loss), taking interface down.\n", 2073 SPP_ARGS(ifp)); 2074 if_down(ifp); 2075 } else { 2076 if (debug) 2077 log(LOG_DEBUG, 2078 SPP_FMT "Down event (carrier loss)\n", 2079 SPP_ARGS(ifp)); 2080 } 2081 sp->pp_flags &= ~PP_CALLIN; 2082 if (sp->state[IDX_LCP] != STATE_INITIAL) 2083 lcp.Close(sp); 2084 ifp->if_flags &= ~IFF_RUNNING; 2085 } 2086 2087 static void 2088 sppp_lcp_open(struct sppp *sp) 2089 { 2090 /* 2091 * If we are authenticator, negotiate LCP_AUTH 2092 */ 2093 if (sp->hisauth.proto != 0) 2094 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2095 else 2096 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2097 sp->pp_flags &= ~PP_NEEDAUTH; 2098 sppp_open_event(&lcp, sp); 2099 } 2100 2101 static void 2102 sppp_lcp_close(struct sppp *sp) 2103 { 2104 sppp_close_event(&lcp, sp); 2105 } 2106 2107 static void 2108 sppp_lcp_TO(void *cookie) 2109 { 2110 sppp_to_event(&lcp, (struct sppp *)cookie); 2111 } 2112 2113 /* 2114 * Analyze a configure request. Return true if it was agreeable, and 2115 * caused action sca, false if it has been rejected or nak'ed, and 2116 * caused action scn. (The return value is used to make the state 2117 * transition decision in the state automaton.) 2118 */ 2119 static int 2120 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2121 { 2122 STDDCL; 2123 u_char *buf, *r, *p; 2124 int origlen, rlen; 2125 u_int32_t nmagic; 2126 u_short authproto; 2127 2128 len -= 4; 2129 origlen = len; 2130 buf = r = malloc (len, M_TEMP, M_NOWAIT); 2131 if (! buf) 2132 return (0); 2133 2134 if (debug) 2135 log(LOG_DEBUG, SPP_FMT "lcp parse opts:", 2136 SPP_ARGS(ifp)); 2137 2138 /* pass 1: check for things that need to be rejected */ 2139 p = (void*) (h+1); 2140 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2141 if (debug) 2142 addlog(" %s", sppp_lcp_opt_name(*p)); 2143 switch (*p) { 2144 case LCP_OPT_MAGIC: 2145 /* Magic number. */ 2146 /* fall through, both are same length */ 2147 case LCP_OPT_ASYNC_MAP: 2148 /* Async control character map. */ 2149 if (len >= 6 || p[1] == 6) 2150 continue; 2151 if (debug) 2152 addlog(" [invalid]"); 2153 break; 2154 case LCP_OPT_MRU: 2155 /* Maximum receive unit. */ 2156 if (len >= 4 && p[1] == 4) 2157 continue; 2158 if (debug) 2159 addlog(" [invalid]"); 2160 break; 2161 case LCP_OPT_AUTH_PROTO: 2162 if (len < 4) { 2163 if (debug) 2164 addlog(" [invalid]"); 2165 break; 2166 } 2167 authproto = (p[2] << 8) + p[3]; 2168 if (authproto == PPP_CHAP && p[1] != 5) { 2169 if (debug) 2170 addlog(" [invalid chap len]"); 2171 break; 2172 } 2173 if (sp->myauth.proto == 0) { 2174 /* we are not configured to do auth */ 2175 if (debug) 2176 addlog(" [not configured]"); 2177 break; 2178 } 2179 /* 2180 * Remote want us to authenticate, remember this, 2181 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2182 * up. 2183 */ 2184 sp->pp_flags |= PP_NEEDAUTH; 2185 continue; 2186 default: 2187 /* Others not supported. */ 2188 if (debug) 2189 addlog(" [rej]"); 2190 break; 2191 } 2192 /* Add the option to rejected list. */ 2193 bcopy (p, r, p[1]); 2194 r += p[1]; 2195 rlen += p[1]; 2196 } 2197 if (rlen) { 2198 if (debug) 2199 addlog(" send conf-rej\n"); 2200 sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2201 goto end; 2202 } else if (debug) 2203 addlog("\n"); 2204 2205 /* 2206 * pass 2: check for option values that are unacceptable and 2207 * thus require to be nak'ed. 2208 */ 2209 if (debug) 2210 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ", 2211 SPP_ARGS(ifp)); 2212 2213 p = (void*) (h+1); 2214 len = origlen; 2215 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2216 if (debug) 2217 addlog(" %s", sppp_lcp_opt_name(*p)); 2218 switch (*p) { 2219 case LCP_OPT_MAGIC: 2220 /* Magic number -- extract. */ 2221 nmagic = (u_int32_t)p[2] << 24 | 2222 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2223 if (nmagic != sp->lcp.magic) { 2224 if (debug) 2225 addlog(" 0x%x", nmagic); 2226 continue; 2227 } 2228 /* 2229 * Local and remote magics equal -- loopback? 2230 */ 2231 if (sp->pp_loopcnt >= MAXALIVECNT*5) { 2232 printf (SPP_FMT "loopback\n", 2233 SPP_ARGS(ifp)); 2234 sp->pp_loopcnt = 0; 2235 if (ifp->if_flags & IFF_UP) { 2236 if_down(ifp); 2237 IF_PURGE(&sp->pp_cpq); 2238 /* XXX ? */ 2239 lcp.Down(sp); 2240 lcp.Up(sp); 2241 } 2242 } else if (debug) 2243 addlog(" [glitch]"); 2244 ++sp->pp_loopcnt; 2245 /* 2246 * We negate our magic here, and NAK it. If 2247 * we see it later in an NAK packet, we 2248 * suggest a new one. 2249 */ 2250 nmagic = ~sp->lcp.magic; 2251 /* Gonna NAK it. */ 2252 p[2] = nmagic >> 24; 2253 p[3] = nmagic >> 16; 2254 p[4] = nmagic >> 8; 2255 p[5] = nmagic; 2256 break; 2257 2258 case LCP_OPT_ASYNC_MAP: 2259 /* Async control character map -- check to be zero. */ 2260 if (! p[2] && ! p[3] && ! p[4] && ! p[5]) { 2261 if (debug) 2262 addlog(" [empty]"); 2263 continue; 2264 } 2265 if (debug) 2266 addlog(" [non-empty]"); 2267 /* suggest a zero one */ 2268 #ifndef BROKEN_98 /* XXX - broken Win98 drivers INSIST on having an ASYNC_MAP */ 2269 p[2] = p[3] = p[4] = p[5] = 0; 2270 break; 2271 #else 2272 continue; 2273 #endif 2274 2275 case LCP_OPT_MRU: 2276 /* 2277 * Maximum receive unit. Always agreeable, 2278 * but ignored by now. 2279 */ 2280 sp->lcp.their_mru = p[2] * 256 + p[3]; 2281 if (debug) 2282 addlog(" %ld", sp->lcp.their_mru); 2283 continue; 2284 2285 case LCP_OPT_AUTH_PROTO: 2286 authproto = (p[2] << 8) + p[3]; 2287 if (sp->myauth.proto != authproto) { 2288 /* not agreed, nak */ 2289 if (debug) 2290 addlog(" [mine %s != his %s]", 2291 sppp_proto_name(sp->hisauth.proto), 2292 sppp_proto_name(authproto)); 2293 p[2] = sp->myauth.proto >> 8; 2294 p[3] = sp->myauth.proto; 2295 break; 2296 } 2297 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2298 if (debug) 2299 addlog(" [chap not MD5]"); 2300 p[4] = CHAP_MD5; 2301 break; 2302 } 2303 continue; 2304 } 2305 /* Add the option to nak'ed list. */ 2306 bcopy (p, r, p[1]); 2307 r += p[1]; 2308 rlen += p[1]; 2309 } 2310 if (rlen) { 2311 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2312 if (debug) 2313 addlog(" max_failure (%d) exceeded, " 2314 "send conf-rej\n", 2315 sp->lcp.max_failure); 2316 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2317 } else { 2318 if (debug) 2319 addlog(" send conf-nak\n"); 2320 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2321 } 2322 goto end; 2323 } else { 2324 if (debug) 2325 addlog(" send conf-ack\n"); 2326 sp->fail_counter[IDX_LCP] = 0; 2327 sp->pp_loopcnt = 0; 2328 sppp_cp_send (sp, PPP_LCP, CONF_ACK, 2329 h->ident, origlen, h+1); 2330 } 2331 2332 end: 2333 free (buf, M_TEMP); 2334 return (rlen == 0); 2335 } 2336 2337 /* 2338 * Analyze the LCP Configure-Reject option list, and adjust our 2339 * negotiation. 2340 */ 2341 static void 2342 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2343 { 2344 STDDCL; 2345 u_char *buf, *p; 2346 2347 len -= 4; 2348 buf = malloc (len, M_TEMP, M_NOWAIT); 2349 if (!buf) 2350 return; 2351 2352 if (debug) 2353 log(LOG_DEBUG, SPP_FMT "lcp rej opts:", 2354 SPP_ARGS(ifp)); 2355 2356 p = (void*) (h+1); 2357 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2358 if (debug) 2359 addlog(" %s", sppp_lcp_opt_name(*p)); 2360 switch (*p) { 2361 case LCP_OPT_MAGIC: 2362 /* Magic number -- can't use it, use 0 */ 2363 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2364 sp->lcp.magic = 0; 2365 break; 2366 case LCP_OPT_MRU: 2367 /* 2368 * Should not be rejected anyway, since we only 2369 * negotiate a MRU if explicitly requested by 2370 * peer. 2371 */ 2372 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2373 break; 2374 case LCP_OPT_AUTH_PROTO: 2375 /* 2376 * Peer doesn't want to authenticate himself, 2377 * deny unless this is a dialout call, and 2378 * SPPP_AUTHFLAG_NOCALLOUT is set. 2379 */ 2380 if ((sp->pp_flags & PP_CALLIN) == 0 && 2381 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2382 if (debug) 2383 addlog(" [don't insist on auth " 2384 "for callout]"); 2385 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2386 break; 2387 } 2388 if (debug) 2389 addlog("[access denied]\n"); 2390 lcp.Close(sp); 2391 break; 2392 } 2393 } 2394 if (debug) 2395 addlog("\n"); 2396 free (buf, M_TEMP); 2397 return; 2398 } 2399 2400 /* 2401 * Analyze the LCP Configure-NAK option list, and adjust our 2402 * negotiation. 2403 */ 2404 static void 2405 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2406 { 2407 STDDCL; 2408 u_char *buf, *p; 2409 u_int32_t magic; 2410 2411 len -= 4; 2412 buf = malloc (len, M_TEMP, M_NOWAIT); 2413 if (!buf) 2414 return; 2415 2416 if (debug) 2417 log(LOG_DEBUG, SPP_FMT "lcp nak opts:", 2418 SPP_ARGS(ifp)); 2419 2420 p = (void*) (h+1); 2421 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2422 if (debug) 2423 addlog(" %s", sppp_lcp_opt_name(*p)); 2424 switch (*p) { 2425 case LCP_OPT_MAGIC: 2426 /* Magic number -- renegotiate */ 2427 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2428 len >= 6 && p[1] == 6) { 2429 magic = (u_int32_t)p[2] << 24 | 2430 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2431 /* 2432 * If the remote magic is our negated one, 2433 * this looks like a loopback problem. 2434 * Suggest a new magic to make sure. 2435 */ 2436 if (magic == ~sp->lcp.magic) { 2437 if (debug) 2438 addlog(" magic glitch"); 2439 sp->lcp.magic = random(); 2440 } else { 2441 sp->lcp.magic = magic; 2442 if (debug) 2443 addlog(" %d", magic); 2444 } 2445 } 2446 break; 2447 case LCP_OPT_MRU: 2448 /* 2449 * Peer wants to advise us to negotiate an MRU. 2450 * Agree on it if it's reasonable, or use 2451 * default otherwise. 2452 */ 2453 if (len >= 4 && p[1] == 4) { 2454 u_int mru = p[2] * 256 + p[3]; 2455 if (debug) 2456 addlog(" %d", mru); 2457 if (mru < PP_MTU || mru > PP_MAX_MRU) 2458 mru = PP_MTU; 2459 sp->lcp.mru = mru; 2460 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2461 } 2462 break; 2463 case LCP_OPT_AUTH_PROTO: 2464 /* 2465 * Peer doesn't like our authentication method, 2466 * deny. 2467 */ 2468 if (debug) 2469 addlog("[access denied]\n"); 2470 lcp.Close(sp); 2471 break; 2472 } 2473 } 2474 if (debug) 2475 addlog("\n"); 2476 free (buf, M_TEMP); 2477 return; 2478 } 2479 2480 static void 2481 sppp_lcp_tlu(struct sppp *sp) 2482 { 2483 STDDCL; 2484 int i; 2485 u_int32_t mask; 2486 2487 /* XXX ? */ 2488 if (! (ifp->if_flags & IFF_UP) && 2489 (ifp->if_flags & IFF_RUNNING)) { 2490 /* Coming out of loopback mode. */ 2491 if_up(ifp); 2492 } 2493 2494 for (i = 0; i < IDX_COUNT; i++) 2495 if ((cps[i])->flags & CP_QUAL) 2496 (cps[i])->Open(sp); 2497 2498 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2499 (sp->pp_flags & PP_NEEDAUTH) != 0) 2500 sp->pp_phase = SPPP_PHASE_AUTHENTICATE; 2501 else 2502 sp->pp_phase = SPPP_PHASE_NETWORK; 2503 2504 if(debug) 2505 { 2506 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2507 sppp_phase_name(sp->pp_phase)); 2508 } 2509 2510 /* 2511 * Open all authentication protocols. This is even required 2512 * if we already proceeded to network phase, since it might be 2513 * that remote wants us to authenticate, so we might have to 2514 * send a PAP request. Undesired authentication protocols 2515 * don't do anything when they get an Open event. 2516 */ 2517 for (i = 0; i < IDX_COUNT; i++) 2518 if ((cps[i])->flags & CP_AUTH) 2519 (cps[i])->Open(sp); 2520 2521 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2522 /* Notify all NCPs. */ 2523 for (i = 0; i < IDX_COUNT; i++) 2524 if ((cps[i])->flags & CP_NCP) 2525 (cps[i])->Open(sp); 2526 } 2527 2528 /* Send Up events to all started protos. */ 2529 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2530 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) 2531 (cps[i])->Up(sp); 2532 2533 /* notify low-level driver of state change */ 2534 if (sp->pp_chg) 2535 sp->pp_chg(sp, (int)sp->pp_phase); 2536 2537 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2538 /* if no NCP is starting, close down */ 2539 sppp_lcp_check_and_close(sp); 2540 } 2541 2542 static void 2543 sppp_lcp_tld(struct sppp *sp) 2544 { 2545 STDDCL; 2546 int i; 2547 u_int32_t mask; 2548 2549 sp->pp_phase = SPPP_PHASE_TERMINATE; 2550 2551 if(debug) 2552 { 2553 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2554 sppp_phase_name(sp->pp_phase)); 2555 } 2556 2557 /* 2558 * Take upper layers down. We send the Down event first and 2559 * the Close second to prevent the upper layers from sending 2560 * ``a flurry of terminate-request packets'', as the RFC 2561 * describes it. 2562 */ 2563 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2564 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2565 (cps[i])->Down(sp); 2566 (cps[i])->Close(sp); 2567 } 2568 } 2569 2570 static void 2571 sppp_lcp_tls(struct sppp *sp) 2572 { 2573 STDDCL; 2574 2575 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2576 printf("%s: authentication failed %d times, not retrying again\n", 2577 sp->pp_if.if_xname, sp->pp_auth_failures); 2578 if_down(&sp->pp_if); 2579 return; 2580 } 2581 2582 sp->pp_phase = SPPP_PHASE_ESTABLISH; 2583 2584 if(debug) 2585 { 2586 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2587 sppp_phase_name(sp->pp_phase)); 2588 } 2589 2590 /* Notify lower layer if desired. */ 2591 if (sp->pp_tls) 2592 (sp->pp_tls)(sp); 2593 } 2594 2595 static void 2596 sppp_lcp_tlf(struct sppp *sp) 2597 { 2598 STDDCL; 2599 2600 sp->pp_phase = SPPP_PHASE_DEAD; 2601 2602 if(debug) 2603 { 2604 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2605 sppp_phase_name(sp->pp_phase)); 2606 } 2607 2608 /* Notify lower layer if desired. */ 2609 if (sp->pp_tlf) 2610 (sp->pp_tlf)(sp); 2611 } 2612 2613 static void 2614 sppp_lcp_scr(struct sppp *sp) 2615 { 2616 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2617 int i = 0; 2618 u_short authproto; 2619 2620 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2621 if (! sp->lcp.magic) 2622 sp->lcp.magic = random(); 2623 opt[i++] = LCP_OPT_MAGIC; 2624 opt[i++] = 6; 2625 opt[i++] = sp->lcp.magic >> 24; 2626 opt[i++] = sp->lcp.magic >> 16; 2627 opt[i++] = sp->lcp.magic >> 8; 2628 opt[i++] = sp->lcp.magic; 2629 } 2630 2631 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2632 opt[i++] = LCP_OPT_MRU; 2633 opt[i++] = 4; 2634 opt[i++] = sp->lcp.mru >> 8; 2635 opt[i++] = sp->lcp.mru; 2636 } 2637 2638 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2639 authproto = sp->hisauth.proto; 2640 opt[i++] = LCP_OPT_AUTH_PROTO; 2641 opt[i++] = authproto == PPP_CHAP? 5: 4; 2642 opt[i++] = authproto >> 8; 2643 opt[i++] = authproto; 2644 if (authproto == PPP_CHAP) 2645 opt[i++] = CHAP_MD5; 2646 } 2647 2648 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2649 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2650 } 2651 2652 /* 2653 * Check the open NCPs, return true if at least one NCP is open. 2654 */ 2655 static int 2656 sppp_ncp_check(struct sppp *sp) 2657 { 2658 int i, mask; 2659 2660 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2661 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2662 return 1; 2663 return 0; 2664 } 2665 2666 /* 2667 * Re-check the open NCPs and see if we should terminate the link. 2668 * Called by the NCPs during their tlf action handling. 2669 */ 2670 static void 2671 sppp_lcp_check_and_close(struct sppp *sp) 2672 { 2673 2674 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2675 /* don't bother, we are already going down */ 2676 return; 2677 2678 if (sppp_ncp_check(sp)) 2679 return; 2680 2681 lcp.Close(sp); 2682 } 2683 2684 2685 /* 2686 *--------------------------------------------------------------------------* 2687 * * 2688 * The IPCP implementation. * 2689 * * 2690 *--------------------------------------------------------------------------* 2691 */ 2692 2693 static void 2694 sppp_ipcp_init(struct sppp *sp) 2695 { 2696 sp->ipcp.opts = 0; 2697 sp->ipcp.flags = 0; 2698 sp->state[IDX_IPCP] = STATE_INITIAL; 2699 sp->fail_counter[IDX_IPCP] = 0; 2700 sp->pp_seq[IDX_IPCP] = 0; 2701 sp->pp_rseq[IDX_IPCP] = 0; 2702 callout_init(&sp->ch[IDX_IPCP]); 2703 } 2704 2705 static void 2706 sppp_ipcp_up(struct sppp *sp) 2707 { 2708 sppp_up_event(&ipcp, sp); 2709 } 2710 2711 static void 2712 sppp_ipcp_down(struct sppp *sp) 2713 { 2714 sppp_down_event(&ipcp, sp); 2715 } 2716 2717 static void 2718 sppp_ipcp_open(struct sppp *sp) 2719 { 2720 STDDCL; 2721 u_int32_t myaddr, hisaddr; 2722 2723 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 2724 sp->ipcp.req_myaddr = 0; 2725 sp->ipcp.req_hisaddr = 0; 2726 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 2727 2728 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 2729 /* 2730 * If we don't have his address, this probably means our 2731 * interface doesn't want to talk IP at all. (This could 2732 * be the case if somebody wants to speak only IPX, for 2733 * example.) Don't open IPCP in this case. 2734 */ 2735 if (hisaddr == 0L) { 2736 /* XXX this message should go away */ 2737 if (debug) 2738 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n", 2739 SPP_ARGS(ifp)); 2740 return; 2741 } 2742 2743 if (myaddr == 0) { 2744 /* 2745 * I don't have an assigned address, so i need to 2746 * negotiate my address. 2747 */ 2748 sp->ipcp.flags |= IPCP_MYADDR_DYN; 2749 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2750 } 2751 if (hisaddr == 1) { 2752 /* 2753 * XXX - remove this hack! 2754 * remote has no valid adress, we need to get one assigned. 2755 */ 2756 sp->ipcp.flags |= IPCP_HISADDR_DYN; 2757 } 2758 sppp_open_event(&ipcp, sp); 2759 } 2760 2761 static void 2762 sppp_ipcp_close(struct sppp *sp) 2763 { 2764 sppp_close_event(&ipcp, sp); 2765 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 2766 /* 2767 * Some address was dynamic, clear it again. 2768 */ 2769 sppp_clear_ip_addrs(sp); 2770 } 2771 2772 static void 2773 sppp_ipcp_TO(void *cookie) 2774 { 2775 sppp_to_event(&ipcp, (struct sppp *)cookie); 2776 } 2777 2778 /* 2779 * Analyze a configure request. Return true if it was agreeable, and 2780 * caused action sca, false if it has been rejected or nak'ed, and 2781 * caused action scn. (The return value is used to make the state 2782 * transition decision in the state automaton.) 2783 */ 2784 static int 2785 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2786 { 2787 u_char *buf, *r, *p; 2788 struct ifnet *ifp = &sp->pp_if; 2789 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 2790 u_int32_t hisaddr, desiredaddr; 2791 2792 len -= 4; 2793 origlen = len; 2794 /* 2795 * Make sure to allocate a buf that can at least hold a 2796 * conf-nak with an `address' option. We might need it below. 2797 */ 2798 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 2799 if (! buf) 2800 return (0); 2801 2802 /* pass 1: see if we can recognize them */ 2803 if (debug) 2804 log(LOG_DEBUG, SPP_FMT "ipcp parse opts:", 2805 SPP_ARGS(ifp)); 2806 p = (void*) (h+1); 2807 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2808 if (debug) 2809 addlog(" %s", sppp_ipcp_opt_name(*p)); 2810 switch (*p) { 2811 #ifdef notyet 2812 case IPCP_OPT_COMPRESSION: 2813 if (len >= 6 && p[1] >= 6) { 2814 /* correctly formed compress option */ 2815 continue; 2816 } 2817 if (debug) 2818 addlog(" [invalid]"); 2819 break; 2820 #endif 2821 case IPCP_OPT_ADDRESS: 2822 if (len >= 6 && p[1] == 6) { 2823 /* correctly formed address option */ 2824 continue; 2825 } 2826 if (debug) 2827 addlog(" [invalid]"); 2828 break; 2829 default: 2830 /* Others not supported. */ 2831 if (debug) 2832 addlog(" [rej]"); 2833 break; 2834 } 2835 /* Add the option to rejected list. */ 2836 bcopy (p, r, p[1]); 2837 r += p[1]; 2838 rlen += p[1]; 2839 } 2840 if (rlen) { 2841 if (debug) 2842 addlog(" send conf-rej\n"); 2843 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 2844 goto end; 2845 } else if (debug) 2846 addlog("\n"); 2847 2848 /* pass 2: parse option values */ 2849 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 2850 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 2851 else 2852 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 2853 if (debug) 2854 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ", 2855 SPP_ARGS(ifp)); 2856 p = (void*) (h+1); 2857 len = origlen; 2858 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2859 if (debug) 2860 addlog(" %s", sppp_ipcp_opt_name(*p)); 2861 switch (*p) { 2862 #ifdef notyet 2863 case IPCP_OPT_COMPRESSION: 2864 continue; 2865 #endif 2866 case IPCP_OPT_ADDRESS: 2867 desiredaddr = p[2] << 24 | p[3] << 16 | 2868 p[4] << 8 | p[5]; 2869 if (desiredaddr == hisaddr || 2870 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 2871 /* 2872 * Peer's address is same as our value, 2873 * this is agreeable. Gonna conf-ack 2874 * it. 2875 */ 2876 if (debug) 2877 addlog(" %s [ack]", 2878 sppp_dotted_quad(hisaddr)); 2879 /* record that we've seen it already */ 2880 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 2881 sp->ipcp.req_hisaddr = desiredaddr; 2882 hisaddr = desiredaddr; 2883 continue; 2884 } 2885 /* 2886 * The address wasn't agreeable. This is either 2887 * he sent us 0.0.0.0, asking to assign him an 2888 * address, or he send us another address not 2889 * matching our value. Either case, we gonna 2890 * conf-nak it with our value. 2891 */ 2892 if (debug) { 2893 if (desiredaddr == 0) 2894 addlog(" [addr requested]"); 2895 else 2896 addlog(" %s [not agreed]", 2897 sppp_dotted_quad(desiredaddr)); 2898 } 2899 2900 p[2] = hisaddr >> 24; 2901 p[3] = hisaddr >> 16; 2902 p[4] = hisaddr >> 8; 2903 p[5] = hisaddr; 2904 break; 2905 } 2906 /* Add the option to nak'ed list. */ 2907 bcopy (p, r, p[1]); 2908 r += p[1]; 2909 rlen += p[1]; 2910 } 2911 2912 /* 2913 * If we are about to conf-ack the request, but haven't seen 2914 * his address so far, gonna conf-nak it instead, with the 2915 * `address' option present and our idea of his address being 2916 * filled in there, to request negotiation of both addresses. 2917 * 2918 * XXX This can result in an endless req - nak loop if peer 2919 * doesn't want to send us his address. Q: What should we do 2920 * about it? XXX A: implement the max-failure counter. 2921 */ 2922 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 2923 buf[0] = IPCP_OPT_ADDRESS; 2924 buf[1] = 6; 2925 buf[2] = hisaddr >> 24; 2926 buf[3] = hisaddr >> 16; 2927 buf[4] = hisaddr >> 8; 2928 buf[5] = hisaddr; 2929 rlen = 6; 2930 if (debug) 2931 addlog(" still need hisaddr"); 2932 } 2933 2934 if (rlen) { 2935 if (debug) 2936 addlog(" send conf-nak\n"); 2937 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 2938 } else { 2939 if (debug) 2940 addlog(" send conf-ack\n"); 2941 sppp_cp_send (sp, PPP_IPCP, CONF_ACK, 2942 h->ident, origlen, h+1); 2943 } 2944 2945 end: 2946 free (buf, M_TEMP); 2947 return (rlen == 0); 2948 } 2949 2950 /* 2951 * Analyze the IPCP Configure-Reject option list, and adjust our 2952 * negotiation. 2953 */ 2954 static void 2955 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2956 { 2957 u_char *buf, *p; 2958 struct ifnet *ifp = &sp->pp_if; 2959 int debug = ifp->if_flags & IFF_DEBUG; 2960 2961 len -= 4; 2962 buf = malloc (len, M_TEMP, M_NOWAIT); 2963 if (!buf) 2964 return; 2965 2966 if (debug) 2967 log(LOG_DEBUG, SPP_FMT "ipcp rej opts:", 2968 SPP_ARGS(ifp)); 2969 2970 p = (void*) (h+1); 2971 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2972 if (debug) 2973 addlog(" %s", sppp_ipcp_opt_name(*p)); 2974 switch (*p) { 2975 case IPCP_OPT_ADDRESS: 2976 /* 2977 * Peer doesn't grok address option. This is 2978 * bad. XXX Should we better give up here? 2979 */ 2980 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 2981 break; 2982 #ifdef notyet 2983 case IPCP_OPT_COMPRESS: 2984 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 2985 break; 2986 #endif 2987 } 2988 } 2989 if (debug) 2990 addlog("\n"); 2991 free (buf, M_TEMP); 2992 return; 2993 } 2994 2995 /* 2996 * Analyze the IPCP Configure-NAK option list, and adjust our 2997 * negotiation. 2998 */ 2999 static void 3000 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3001 { 3002 u_char *p; 3003 struct ifnet *ifp = &sp->pp_if; 3004 int debug = ifp->if_flags & IFF_DEBUG; 3005 u_int32_t wantaddr; 3006 3007 len -= 4; 3008 3009 if (debug) 3010 log(LOG_DEBUG, SPP_FMT "ipcp nak opts:", 3011 SPP_ARGS(ifp)); 3012 3013 p = (void*) (h+1); 3014 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3015 if (debug) 3016 addlog(" %s", sppp_ipcp_opt_name(*p)); 3017 switch (*p) { 3018 case IPCP_OPT_ADDRESS: 3019 /* 3020 * Peer doesn't like our local IP address. See 3021 * if we can do something for him. We'll drop 3022 * him our address then. 3023 */ 3024 if (len >= 6 && p[1] == 6) { 3025 wantaddr = p[2] << 24 | p[3] << 16 | 3026 p[4] << 8 | p[5]; 3027 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3028 if (debug) 3029 addlog(" [wantaddr %s]", 3030 sppp_dotted_quad(wantaddr)); 3031 /* 3032 * When doing dynamic address assignment, 3033 * we accept his offer. Otherwise, we 3034 * ignore it and thus continue to negotiate 3035 * our already existing value. 3036 */ 3037 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3038 if (debug) 3039 addlog(" [agree]"); 3040 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3041 sp->ipcp.req_myaddr = wantaddr; 3042 } 3043 } 3044 break; 3045 3046 case IPCP_OPT_PRIMDNS: 3047 if (len >= 6 && p[1] == 6) { 3048 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3049 p[4] << 8 | p[5]; 3050 } 3051 break; 3052 3053 case IPCP_OPT_SECDNS: 3054 if (len >= 6 && p[1] == 6) { 3055 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3056 p[4] << 8 | p[5]; 3057 } 3058 break; 3059 #ifdef notyet 3060 case IPCP_OPT_COMPRESS: 3061 /* 3062 * Peer wants different compression parameters. 3063 */ 3064 break; 3065 #endif 3066 } 3067 } 3068 if (debug) 3069 addlog("\n"); 3070 return; 3071 } 3072 3073 static void 3074 sppp_ipcp_tlu(struct sppp *sp) 3075 { 3076 /* we are up. Set addresses and notify anyone interested */ 3077 u_int32_t myaddr, hisaddr; 3078 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3079 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 3080 myaddr = sp->ipcp.req_myaddr; 3081 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 3082 hisaddr = sp->ipcp.req_hisaddr; 3083 sppp_set_ip_addrs(sp, myaddr, hisaddr); 3084 if (sp->pp_con) 3085 sp->pp_con(sp); 3086 } 3087 3088 static void 3089 sppp_ipcp_tld(struct sppp *sp) 3090 { 3091 } 3092 3093 static void 3094 sppp_ipcp_tls(struct sppp *sp) 3095 { 3096 /* indicate to LCP that it must stay alive */ 3097 sp->lcp.protos |= (1 << IDX_IPCP); 3098 } 3099 3100 static void 3101 sppp_ipcp_tlf(struct sppp *sp) 3102 { 3103 /* we no longer need LCP */ 3104 sp->lcp.protos &= ~(1 << IDX_IPCP); 3105 } 3106 3107 static void 3108 sppp_ipcp_scr(struct sppp *sp) 3109 { 3110 char opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3111 u_int32_t ouraddr; 3112 int i = 0; 3113 3114 #ifdef notyet 3115 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3116 opt[i++] = IPCP_OPT_COMPRESSION; 3117 opt[i++] = 6; 3118 opt[i++] = 0; /* VJ header compression */ 3119 opt[i++] = 0x2d; /* VJ header compression */ 3120 opt[i++] = max_slot_id; 3121 opt[i++] = comp_slot_id; 3122 } 3123 #endif 3124 3125 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3126 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3127 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3128 else 3129 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3130 opt[i++] = IPCP_OPT_ADDRESS; 3131 opt[i++] = 6; 3132 opt[i++] = ouraddr >> 24; 3133 opt[i++] = ouraddr >> 16; 3134 opt[i++] = ouraddr >> 8; 3135 opt[i++] = ouraddr; 3136 } 3137 3138 if (sp->query_dns & 1) { 3139 opt[i++] = IPCP_OPT_PRIMDNS; 3140 opt[i++] = 6; 3141 opt[i++] = sp->dns_addrs[0] >> 24; 3142 opt[i++] = sp->dns_addrs[0] >> 16; 3143 opt[i++] = sp->dns_addrs[0] >> 8; 3144 opt[i++] = sp->dns_addrs[0]; 3145 } 3146 if (sp->query_dns & 2) { 3147 opt[i++] = IPCP_OPT_SECDNS; 3148 opt[i++] = 6; 3149 opt[i++] = sp->dns_addrs[1] >> 24; 3150 opt[i++] = sp->dns_addrs[1] >> 16; 3151 opt[i++] = sp->dns_addrs[1] >> 8; 3152 opt[i++] = sp->dns_addrs[1]; 3153 } 3154 3155 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3156 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3157 } 3158 3159 3160 /* 3161 *--------------------------------------------------------------------------* 3162 * * 3163 * The IPv6CP implementation. * 3164 * * 3165 *--------------------------------------------------------------------------* 3166 */ 3167 3168 #ifdef INET6 3169 static void 3170 sppp_ipv6cp_init(struct sppp *sp) 3171 { 3172 sp->ipv6cp.opts = 0; 3173 sp->ipv6cp.flags = 0; 3174 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3175 sp->fail_counter[IDX_IPV6CP] = 0; 3176 sp->pp_seq[IDX_IPV6CP] = 0; 3177 sp->pp_rseq[IDX_IPV6CP] = 0; 3178 callout_init(&sp->ch[IDX_IPV6CP]); 3179 } 3180 3181 static void 3182 sppp_ipv6cp_up(struct sppp *sp) 3183 { 3184 sppp_up_event(&ipv6cp, sp); 3185 } 3186 3187 static void 3188 sppp_ipv6cp_down(struct sppp *sp) 3189 { 3190 sppp_down_event(&ipv6cp, sp); 3191 } 3192 3193 static void 3194 sppp_ipv6cp_open(struct sppp *sp) 3195 { 3196 STDDCL; 3197 struct in6_addr myaddr, hisaddr; 3198 3199 #ifdef IPV6CP_MYIFID_DYN 3200 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3201 #else 3202 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3203 #endif 3204 3205 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3206 /* 3207 * If we don't have our address, this probably means our 3208 * interface doesn't want to talk IPv6 at all. (This could 3209 * be the case if somebody wants to speak only IPX, for 3210 * example.) Don't open IPv6CP in this case. 3211 */ 3212 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3213 /* XXX this message should go away */ 3214 if (debug) 3215 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n", 3216 SPP_ARGS(ifp)); 3217 return; 3218 } 3219 3220 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3221 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3222 sppp_open_event(&ipv6cp, sp); 3223 } 3224 3225 static void 3226 sppp_ipv6cp_close(struct sppp *sp) 3227 { 3228 sppp_close_event(&ipv6cp, sp); 3229 } 3230 3231 static void 3232 sppp_ipv6cp_TO(void *cookie) 3233 { 3234 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3235 } 3236 3237 /* 3238 * Analyze a configure request. Return true if it was agreeable, and 3239 * caused action sca, false if it has been rejected or nak'ed, and 3240 * caused action scn. (The return value is used to make the state 3241 * transition decision in the state automaton.) 3242 */ 3243 static int 3244 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3245 { 3246 u_char *buf, *r, *p; 3247 struct ifnet *ifp = &sp->pp_if; 3248 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3249 struct in6_addr myaddr, desiredaddr, suggestaddr; 3250 int ifidcount; 3251 int type; 3252 int collision, nohisaddr; 3253 3254 len -= 4; 3255 origlen = len; 3256 /* 3257 * Make sure to allocate a buf that can at least hold a 3258 * conf-nak with an `address' option. We might need it below. 3259 */ 3260 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 3261 if (! buf) 3262 return (0); 3263 3264 /* pass 1: see if we can recognize them */ 3265 if (debug) 3266 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:", 3267 SPP_ARGS(ifp)); 3268 p = (void*) (h+1); 3269 ifidcount = 0; 3270 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3271 if (debug) 3272 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3273 switch (*p) { 3274 case IPV6CP_OPT_IFID: 3275 if (len >= 10 && p[1] == 10 && ifidcount == 0) { 3276 /* correctly formed address option */ 3277 ifidcount++; 3278 continue; 3279 } 3280 if (debug) 3281 addlog(" [invalid]"); 3282 break; 3283 #ifdef notyet 3284 case IPV6CP_OPT_COMPRESSION: 3285 if (len >= 4 && p[1] >= 4) { 3286 /* correctly formed compress option */ 3287 continue; 3288 } 3289 if (debug) 3290 addlog(" [invalid]"); 3291 break; 3292 #endif 3293 default: 3294 /* Others not supported. */ 3295 if (debug) 3296 addlog(" [rej]"); 3297 break; 3298 } 3299 /* Add the option to rejected list. */ 3300 bcopy (p, r, p[1]); 3301 r += p[1]; 3302 rlen += p[1]; 3303 } 3304 if (rlen) { 3305 if (debug) 3306 addlog(" send conf-rej\n"); 3307 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3308 goto end; 3309 } else if (debug) 3310 addlog("\n"); 3311 3312 /* pass 2: parse option values */ 3313 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3314 if (debug) 3315 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ", 3316 SPP_ARGS(ifp)); 3317 p = (void*) (h+1); 3318 len = origlen; 3319 type = CONF_ACK; 3320 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3321 if (debug) 3322 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3323 switch (*p) { 3324 #ifdef notyet 3325 case IPV6CP_OPT_COMPRESSION: 3326 continue; 3327 #endif 3328 case IPV6CP_OPT_IFID: 3329 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3330 bcopy(&p[2], &desiredaddr.s6_addr[8], 8); 3331 collision = (memcmp(&desiredaddr.s6_addr[8], 3332 &myaddr.s6_addr[8], 8) == 0); 3333 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3334 3335 desiredaddr.s6_addr16[0] = htons(0xfe80); 3336 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3337 3338 if (!collision && !nohisaddr) { 3339 /* no collision, hisaddr known - Conf-Ack */ 3340 type = CONF_ACK; 3341 3342 if (debug) { 3343 addlog(" %s [%s]", 3344 ip6_sprintf(&desiredaddr), 3345 sppp_cp_type_name(type)); 3346 } 3347 continue; 3348 } 3349 3350 memset(&suggestaddr, 0, sizeof(&suggestaddr)); 3351 if (collision && nohisaddr) { 3352 /* collision, hisaddr unknown - Conf-Rej */ 3353 type = CONF_REJ; 3354 memset(&p[2], 0, 8); 3355 } else { 3356 /* 3357 * - no collision, hisaddr unknown, or 3358 * - collision, hisaddr known 3359 * Conf-Nak, suggest hisaddr 3360 */ 3361 type = CONF_NAK; 3362 sppp_suggest_ip6_addr(sp, &suggestaddr); 3363 bcopy(&suggestaddr.s6_addr[8], &p[2], 8); 3364 } 3365 if (debug) 3366 addlog(" %s [%s]", ip6_sprintf(&desiredaddr), 3367 sppp_cp_type_name(type)); 3368 break; 3369 } 3370 /* Add the option to nak'ed list. */ 3371 bcopy (p, r, p[1]); 3372 r += p[1]; 3373 rlen += p[1]; 3374 } 3375 3376 if (rlen == 0 && type == CONF_ACK) { 3377 if (debug) 3378 addlog(" send %s\n", sppp_cp_type_name(type)); 3379 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1); 3380 } else { 3381 #ifdef DIAGNOSTIC 3382 if (type == CONF_ACK) 3383 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3384 #endif 3385 3386 if (debug) { 3387 addlog(" send %s suggest %s\n", 3388 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); 3389 } 3390 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3391 } 3392 3393 end: 3394 free (buf, M_TEMP); 3395 return (rlen == 0); 3396 } 3397 3398 /* 3399 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3400 * negotiation. 3401 */ 3402 static void 3403 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3404 { 3405 u_char *buf, *p; 3406 struct ifnet *ifp = &sp->pp_if; 3407 int debug = ifp->if_flags & IFF_DEBUG; 3408 3409 len -= 4; 3410 buf = malloc (len, M_TEMP, M_NOWAIT); 3411 if (!buf) 3412 return; 3413 3414 if (debug) 3415 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:", 3416 SPP_ARGS(ifp)); 3417 3418 p = (void*) (h+1); 3419 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3420 if (debug) 3421 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3422 switch (*p) { 3423 case IPV6CP_OPT_IFID: 3424 /* 3425 * Peer doesn't grok address option. This is 3426 * bad. XXX Should we better give up here? 3427 */ 3428 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3429 break; 3430 #ifdef notyet 3431 case IPV6CP_OPT_COMPRESS: 3432 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3433 break; 3434 #endif 3435 } 3436 } 3437 if (debug) 3438 addlog("\n"); 3439 free (buf, M_TEMP); 3440 return; 3441 } 3442 3443 /* 3444 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3445 * negotiation. 3446 */ 3447 static void 3448 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3449 { 3450 u_char *buf, *p; 3451 struct ifnet *ifp = &sp->pp_if; 3452 int debug = ifp->if_flags & IFF_DEBUG; 3453 struct in6_addr suggestaddr; 3454 3455 len -= 4; 3456 buf = malloc (len, M_TEMP, M_NOWAIT); 3457 if (!buf) 3458 return; 3459 3460 if (debug) 3461 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:", 3462 SPP_ARGS(ifp)); 3463 3464 p = (void*) (h+1); 3465 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3466 if (debug) 3467 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3468 switch (*p) { 3469 case IPV6CP_OPT_IFID: 3470 /* 3471 * Peer doesn't like our local ifid. See 3472 * if we can do something for him. We'll drop 3473 * him our address then. 3474 */ 3475 if (len < 10 || p[1] != 10) 3476 break; 3477 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3478 suggestaddr.s6_addr16[0] = htons(0xfe80); 3479 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3480 bcopy(&p[2], &suggestaddr.s6_addr[8], 8); 3481 3482 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3483 if (debug) 3484 addlog(" [suggestaddr %s]", 3485 ip6_sprintf(&suggestaddr)); 3486 #ifdef IPV6CP_MYIFID_DYN 3487 /* 3488 * When doing dynamic address assignment, 3489 * we accept his offer. 3490 */ 3491 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3492 struct in6_addr lastsuggest; 3493 /* 3494 * If <suggested myaddr from peer> equals to 3495 * <hisaddr we have suggested last time>, 3496 * we have a collision. generate new random 3497 * ifid. 3498 */ 3499 sppp_suggest_ip6_addr(&lastsuggest); 3500 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3501 lastsuggest)) { 3502 if (debug) 3503 addlog(" [random]"); 3504 sppp_gen_ip6_addr(sp, &suggestaddr); 3505 } 3506 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3507 if (debug) 3508 addlog(" [agree]"); 3509 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3510 } 3511 #else 3512 /* 3513 * Since we do not do dynamic address assignment, 3514 * we ignore it and thus continue to negotiate 3515 * our already existing value. This can possibly 3516 * go into infinite request-reject loop. 3517 * 3518 * This is not likely because we normally use 3519 * ifid based on MAC-address. 3520 * If you have no ethernet card on the node, too bad. 3521 * XXX should we use fail_counter? 3522 */ 3523 #endif 3524 break; 3525 #ifdef notyet 3526 case IPV6CP_OPT_COMPRESS: 3527 /* 3528 * Peer wants different compression parameters. 3529 */ 3530 break; 3531 #endif 3532 } 3533 } 3534 if (debug) 3535 addlog("\n"); 3536 free (buf, M_TEMP); 3537 return; 3538 } 3539 3540 static void 3541 sppp_ipv6cp_tlu(struct sppp *sp) 3542 { 3543 /* we are up - notify isdn daemon */ 3544 if (sp->pp_con) 3545 sp->pp_con(sp); 3546 } 3547 3548 static void 3549 sppp_ipv6cp_tld(struct sppp *sp) 3550 { 3551 } 3552 3553 static void 3554 sppp_ipv6cp_tls(struct sppp *sp) 3555 { 3556 /* indicate to LCP that it must stay alive */ 3557 sp->lcp.protos |= (1 << IDX_IPV6CP); 3558 } 3559 3560 static void 3561 sppp_ipv6cp_tlf(struct sppp *sp) 3562 { 3563 /* we no longer need LCP */ 3564 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3565 } 3566 3567 static void 3568 sppp_ipv6cp_scr(struct sppp *sp) 3569 { 3570 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3571 struct in6_addr ouraddr; 3572 int i = 0; 3573 3574 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3575 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3576 opt[i++] = IPV6CP_OPT_IFID; 3577 opt[i++] = 10; 3578 bcopy(&ouraddr.s6_addr[8], &opt[i], 8); 3579 i += 8; 3580 } 3581 3582 #ifdef notyet 3583 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3584 opt[i++] = IPV6CP_OPT_COMPRESSION; 3585 opt[i++] = 4; 3586 opt[i++] = 0; /* TBD */ 3587 opt[i++] = 0; /* TBD */ 3588 /* variable length data may follow */ 3589 } 3590 #endif 3591 3592 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3593 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 3594 } 3595 #else /*INET6*/ 3596 static void sppp_ipv6cp_init(struct sppp *sp) 3597 { 3598 } 3599 3600 static void sppp_ipv6cp_up(struct sppp *sp) 3601 { 3602 } 3603 3604 static void sppp_ipv6cp_down(struct sppp *sp) 3605 { 3606 } 3607 3608 3609 static void sppp_ipv6cp_open(struct sppp *sp) 3610 { 3611 } 3612 3613 static void sppp_ipv6cp_close(struct sppp *sp) 3614 { 3615 } 3616 3617 static void sppp_ipv6cp_TO(void *sp) 3618 { 3619 } 3620 3621 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3622 { 3623 return 0; 3624 } 3625 3626 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3627 { 3628 } 3629 3630 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3631 { 3632 } 3633 3634 static void sppp_ipv6cp_tlu(struct sppp *sp) 3635 { 3636 } 3637 3638 static void sppp_ipv6cp_tld(struct sppp *sp) 3639 { 3640 } 3641 3642 static void sppp_ipv6cp_tls(struct sppp *sp) 3643 { 3644 } 3645 3646 static void sppp_ipv6cp_tlf(struct sppp *sp) 3647 { 3648 } 3649 3650 static void sppp_ipv6cp_scr(struct sppp *sp) 3651 { 3652 } 3653 #endif /*INET6*/ 3654 3655 3656 /* 3657 *--------------------------------------------------------------------------* 3658 * * 3659 * The CHAP implementation. * 3660 * * 3661 *--------------------------------------------------------------------------* 3662 */ 3663 3664 /* 3665 * The authentication protocols don't employ a full-fledged state machine as 3666 * the control protocols do, since they do have Open and Close events, but 3667 * not Up and Down, nor are they explicitly terminated. Also, use of the 3668 * authentication protocols may be different in both directions (this makes 3669 * sense, think of a machine that never accepts incoming calls but only 3670 * calls out, it doesn't require the called party to authenticate itself). 3671 * 3672 * Our state machine for the local authentication protocol (we are requesting 3673 * the peer to authenticate) looks like: 3674 * 3675 * RCA- 3676 * +--------------------------------------------+ 3677 * V scn,tld| 3678 * +--------+ Close +---------+ RCA+ 3679 * | |<----------------------------------| |------+ 3680 * +--->| Closed | TO* | Opened | sca | 3681 * | | |-----+ +-------| |<-----+ 3682 * | +--------+ irc | | +---------+ 3683 * | ^ | | ^ 3684 * | | | | | 3685 * | | | | | 3686 * | TO-| | | | 3687 * | |tld TO+ V | | 3688 * | | +------->+ | | 3689 * | | | | | | 3690 * | +--------+ V | | 3691 * | | |<----+<--------------------+ | 3692 * | | Req- | scr | 3693 * | | Sent | | 3694 * | | | | 3695 * | +--------+ | 3696 * | RCA- | | RCA+ | 3697 * +------+ +------------------------------------------+ 3698 * scn,tld sca,irc,ict,tlu 3699 * 3700 * 3701 * with: 3702 * 3703 * Open: LCP reached authentication phase 3704 * Close: LCP reached terminate phase 3705 * 3706 * RCA+: received reply (pap-req, chap-response), acceptable 3707 * RCN: received reply (pap-req, chap-response), not acceptable 3708 * TO+: timeout with restart counter >= 0 3709 * TO-: timeout with restart counter < 0 3710 * TO*: reschedule timeout for CHAP 3711 * 3712 * scr: send request packet (none for PAP, chap-challenge) 3713 * sca: send ack packet (pap-ack, chap-success) 3714 * scn: send nak packet (pap-nak, chap-failure) 3715 * ict: initialize re-challenge timer (CHAP only) 3716 * 3717 * tlu: this-layer-up, LCP reaches network phase 3718 * tld: this-layer-down, LCP enters terminate phase 3719 * 3720 * Note that in CHAP mode, after sending a new challenge, while the state 3721 * automaton falls back into Req-Sent state, it doesn't signal a tld 3722 * event to LCP, so LCP remains in network phase. Only after not getting 3723 * any response (or after getting an unacceptable response), CHAP closes, 3724 * causing LCP to enter terminate phase. 3725 * 3726 * With PAP, there is no initial request that can be sent. The peer is 3727 * expected to send one based on the successful negotiation of PAP as 3728 * the authentication protocol during the LCP option negotiation. 3729 * 3730 * Incoming authentication protocol requests (remote requests 3731 * authentication, we are peer) don't employ a state machine at all, 3732 * they are simply answered. Some peers [Ascend P50 firmware rev 3733 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 3734 * still in authentication phase (thereby violating the standard that 3735 * demands that these NCP packets are to be discarded), so we keep 3736 * track of the peer demanding us to authenticate, and only proceed to 3737 * phase network once we've seen a positive acknowledge for the 3738 * authentication. 3739 */ 3740 3741 /* 3742 * Handle incoming CHAP packets. 3743 */ 3744 void 3745 sppp_chap_input(struct sppp *sp, struct mbuf *m) 3746 { 3747 STDDCL; 3748 struct lcp_header *h; 3749 int len, x; 3750 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 3751 int value_len, name_len; 3752 MD5_CTX ctx; 3753 3754 len = m->m_pkthdr.len; 3755 if (len < 4) { 3756 if (debug) 3757 log(LOG_DEBUG, 3758 SPP_FMT "chap invalid packet length: %d bytes\n", 3759 SPP_ARGS(ifp), len); 3760 return; 3761 } 3762 h = mtod (m, struct lcp_header*); 3763 if (len > ntohs (h->len)) 3764 len = ntohs (h->len); 3765 3766 switch (h->type) { 3767 /* challenge, failure and success are his authproto */ 3768 case CHAP_CHALLENGE: 3769 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 3770 /* can't do anything usefull */ 3771 sp->pp_auth_failures++; 3772 printf(SPP_FMT "chap input without my name and my secret being set\n", 3773 SPP_ARGS(ifp)); 3774 break; 3775 } 3776 value = 1 + (u_char*)(h+1); 3777 value_len = value[-1]; 3778 name = value + value_len; 3779 name_len = len - value_len - 5; 3780 if (name_len < 0) { 3781 if (debug) { 3782 log(LOG_DEBUG, 3783 SPP_FMT "chap corrupted challenge " 3784 "<%s id=0x%x len=%d", 3785 SPP_ARGS(ifp), 3786 sppp_auth_type_name(PPP_CHAP, h->type), 3787 h->ident, ntohs(h->len)); 3788 if (len > 4) 3789 sppp_print_bytes((u_char*) (h+1), len-4); 3790 addlog(">\n"); 3791 } 3792 break; 3793 } 3794 3795 if (debug) { 3796 log(LOG_DEBUG, 3797 SPP_FMT "chap input <%s id=0x%x len=%d name=", 3798 SPP_ARGS(ifp), 3799 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 3800 ntohs(h->len)); 3801 sppp_print_string((char*) name, name_len); 3802 addlog(" value-size=%d value=", value_len); 3803 sppp_print_bytes(value, value_len); 3804 addlog(">\n"); 3805 } 3806 3807 /* Compute reply value. */ 3808 MD5Init(&ctx); 3809 MD5Update(&ctx, &h->ident, 1); 3810 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 3811 MD5Update(&ctx, value, value_len); 3812 MD5Final(digest, &ctx); 3813 dsize = sizeof digest; 3814 3815 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 3816 sizeof dsize, (const char *)&dsize, 3817 sizeof digest, digest, 3818 sp->myauth.name_len, 3819 sp->myauth.name, 3820 0); 3821 break; 3822 3823 case CHAP_SUCCESS: 3824 if (debug) { 3825 log(LOG_DEBUG, SPP_FMT "chap success", 3826 SPP_ARGS(ifp)); 3827 if (len > 4) { 3828 addlog(": "); 3829 sppp_print_string((char*)(h + 1), len - 4); 3830 } 3831 addlog("\n"); 3832 } 3833 x = splnet(); 3834 sp->pp_auth_failures = 0; 3835 sp->pp_flags &= ~PP_NEEDAUTH; 3836 if (sp->myauth.proto == PPP_CHAP && 3837 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 3838 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 3839 /* 3840 * We are authenticator for CHAP but didn't 3841 * complete yet. Leave it to tlu to proceed 3842 * to network phase. 3843 */ 3844 splx(x); 3845 break; 3846 } 3847 splx(x); 3848 sppp_phase_network(sp); 3849 break; 3850 3851 case CHAP_FAILURE: 3852 x = splnet(); 3853 sp->pp_auth_failures++; 3854 splx(x); 3855 if (debug) { 3856 log(LOG_INFO, SPP_FMT "chap failure", 3857 SPP_ARGS(ifp)); 3858 if (len > 4) { 3859 addlog(": "); 3860 sppp_print_string((char*)(h + 1), len - 4); 3861 } 3862 addlog("\n"); 3863 } else 3864 log(LOG_INFO, SPP_FMT "chap failure\n", 3865 SPP_ARGS(ifp)); 3866 /* await LCP shutdown by authenticator */ 3867 break; 3868 3869 /* response is my authproto */ 3870 case CHAP_RESPONSE: 3871 if (sp->hisauth.secret == NULL) { 3872 /* can't do anything usefull */ 3873 printf(SPP_FMT "chap input without his secret being set\n", 3874 SPP_ARGS(ifp)); 3875 break; 3876 } 3877 value = 1 + (u_char*)(h+1); 3878 value_len = value[-1]; 3879 name = value + value_len; 3880 name_len = len - value_len - 5; 3881 if (name_len < 0) { 3882 if (debug) { 3883 log(LOG_DEBUG, 3884 SPP_FMT "chap corrupted response " 3885 "<%s id=0x%x len=%d", 3886 SPP_ARGS(ifp), 3887 sppp_auth_type_name(PPP_CHAP, h->type), 3888 h->ident, ntohs(h->len)); 3889 if (len > 4) 3890 sppp_print_bytes((u_char*)(h+1), len-4); 3891 addlog(">\n"); 3892 } 3893 break; 3894 } 3895 if (h->ident != sp->confid[IDX_CHAP]) { 3896 if (debug) 3897 log(LOG_DEBUG, 3898 SPP_FMT "chap dropping response for old ID " 3899 "(got %d, expected %d)\n", 3900 SPP_ARGS(ifp), 3901 h->ident, sp->confid[IDX_CHAP]); 3902 break; 3903 } 3904 if (sp->hisauth.name != NULL && 3905 (name_len != sp->hisauth.name_len 3906 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 3907 log(LOG_INFO, SPP_FMT "chap response, his name ", 3908 SPP_ARGS(ifp)); 3909 sppp_print_string(name, name_len); 3910 addlog(" != expected "); 3911 sppp_print_string(sp->hisauth.name, 3912 sp->hisauth.name_len); 3913 addlog("\n"); 3914 goto chap_failure; 3915 } 3916 if (debug) { 3917 log(LOG_DEBUG, SPP_FMT "chap input(%s) " 3918 "<%s id=0x%x len=%d name=", 3919 SPP_ARGS(ifp), 3920 sppp_state_name(sp->state[IDX_CHAP]), 3921 sppp_auth_type_name(PPP_CHAP, h->type), 3922 h->ident, ntohs (h->len)); 3923 sppp_print_string((char*)name, name_len); 3924 addlog(" value-size=%d value=", value_len); 3925 sppp_print_bytes(value, value_len); 3926 addlog(">\n"); 3927 } 3928 if (value_len != sizeof(sp->myauth.challenge)) { 3929 if (debug) 3930 log(LOG_DEBUG, 3931 SPP_FMT "chap bad hash value length: " 3932 "%d bytes, should be %ld\n", 3933 SPP_ARGS(ifp), value_len, 3934 (long) sizeof(sp->myauth.challenge)); 3935 goto chap_failure; 3936 } 3937 3938 MD5Init(&ctx); 3939 MD5Update(&ctx, &h->ident, 1); 3940 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 3941 MD5Update(&ctx, sp->myauth.challenge, sizeof(sp->myauth.challenge)); 3942 MD5Final(digest, &ctx); 3943 3944 #define FAILMSG "Failed..." 3945 #define SUCCMSG "Welcome!" 3946 3947 if (value_len != sizeof digest || 3948 memcmp(digest, value, value_len) != 0) { 3949 chap_failure: 3950 /* action scn, tld */ 3951 x = splnet(); 3952 sp->pp_auth_failures++; 3953 splx(x); 3954 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 3955 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 3956 0); 3957 chap.tld(sp); 3958 break; 3959 } 3960 sp->pp_auth_failures = 0; 3961 /* action sca, perhaps tlu */ 3962 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 3963 sp->state[IDX_CHAP] == STATE_OPENED) 3964 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 3965 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 3966 0); 3967 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 3968 sppp_cp_change_state(&chap, sp, STATE_OPENED); 3969 chap.tlu(sp); 3970 } 3971 break; 3972 3973 default: 3974 /* Unknown CHAP packet type -- ignore. */ 3975 if (debug) { 3976 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) " 3977 "<0x%x id=0x%xh len=%d", 3978 SPP_ARGS(ifp), 3979 sppp_state_name(sp->state[IDX_CHAP]), 3980 h->type, h->ident, ntohs(h->len)); 3981 if (len > 4) 3982 sppp_print_bytes((u_char*)(h+1), len-4); 3983 addlog(">\n"); 3984 } 3985 break; 3986 3987 } 3988 } 3989 3990 static void 3991 sppp_chap_init(struct sppp *sp) 3992 { 3993 /* Chap doesn't have STATE_INITIAL at all. */ 3994 sp->state[IDX_CHAP] = STATE_CLOSED; 3995 sp->fail_counter[IDX_CHAP] = 0; 3996 sp->pp_seq[IDX_CHAP] = 0; 3997 sp->pp_rseq[IDX_CHAP] = 0; 3998 callout_init(&sp->ch[IDX_CHAP]); 3999 } 4000 4001 static void 4002 sppp_chap_open(struct sppp *sp) 4003 { 4004 if (sp->myauth.proto == PPP_CHAP && 4005 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4006 /* we are authenticator for CHAP, start it */ 4007 chap.scr(sp); 4008 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4009 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4010 } 4011 /* nothing to be done if we are peer, await a challenge */ 4012 } 4013 4014 static void 4015 sppp_chap_close(struct sppp *sp) 4016 { 4017 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4018 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4019 } 4020 4021 static void 4022 sppp_chap_TO(void *cookie) 4023 { 4024 struct sppp *sp = (struct sppp *)cookie; 4025 STDDCL; 4026 int s; 4027 4028 s = splnet(); 4029 if (debug) 4030 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n", 4031 SPP_ARGS(ifp), 4032 sppp_state_name(sp->state[IDX_CHAP]), 4033 sp->rst_counter[IDX_CHAP]); 4034 4035 if (--sp->rst_counter[IDX_CHAP] < 0) 4036 /* TO- event */ 4037 switch (sp->state[IDX_CHAP]) { 4038 case STATE_REQ_SENT: 4039 chap.tld(sp); 4040 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4041 break; 4042 } 4043 else 4044 /* TO+ (or TO*) event */ 4045 switch (sp->state[IDX_CHAP]) { 4046 case STATE_OPENED: 4047 /* TO* event */ 4048 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4049 /* fall through */ 4050 case STATE_REQ_SENT: 4051 chap.scr(sp); 4052 /* sppp_cp_change_state() will restart the timer */ 4053 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4054 break; 4055 } 4056 4057 splx(s); 4058 } 4059 4060 static void 4061 sppp_chap_tlu(struct sppp *sp) 4062 { 4063 STDDCL; 4064 int i, x; 4065 4066 i = 0; 4067 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4068 4069 /* 4070 * Some broken CHAP implementations (Conware CoNet, firmware 4071 * 4.0.?) don't want to re-authenticate their CHAP once the 4072 * initial challenge-response exchange has taken place. 4073 * Provide for an option to avoid rechallenges. 4074 */ 4075 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4076 /* 4077 * Compute the re-challenge timeout. This will yield 4078 * a number between 300 and 810 seconds. 4079 */ 4080 i = 300 + ((unsigned)(random() & 0xff00) >> 7); 4081 4082 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4083 } 4084 4085 if (debug) { 4086 log(LOG_DEBUG, 4087 SPP_FMT "chap %s, ", 4088 SPP_ARGS(ifp), 4089 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4090 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4091 addlog("next re-challenge in %d seconds\n", i); 4092 else 4093 addlog("re-challenging supressed\n"); 4094 } 4095 4096 x = splnet(); 4097 sp->pp_auth_failures = 0; 4098 /* indicate to LCP that we need to be closed down */ 4099 sp->lcp.protos |= (1 << IDX_CHAP); 4100 4101 if (sp->pp_flags & PP_NEEDAUTH) { 4102 /* 4103 * Remote is authenticator, but his auth proto didn't 4104 * complete yet. Defer the transition to network 4105 * phase. 4106 */ 4107 splx(x); 4108 return; 4109 } 4110 splx(x); 4111 4112 /* 4113 * If we are already in phase network, we are done here. This 4114 * is the case if this is a dummy tlu event after a re-challenge. 4115 */ 4116 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4117 sppp_phase_network(sp); 4118 } 4119 4120 static void 4121 sppp_chap_tld(struct sppp *sp) 4122 { 4123 STDDCL; 4124 4125 if (debug) 4126 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp)); 4127 callout_stop(&sp->ch[IDX_CHAP]); 4128 sp->lcp.protos &= ~(1 << IDX_CHAP); 4129 4130 lcp.Close(sp); 4131 } 4132 4133 static void 4134 sppp_chap_scr(struct sppp *sp) 4135 { 4136 struct timeval tv; 4137 u_int32_t *ch, seed; 4138 u_char clen; 4139 4140 if (sp->myauth.name == NULL) { 4141 /* can't do anything usefull */ 4142 printf(SPP_FMT "chap starting without my name being set\n", 4143 SPP_ARGS(&sp->pp_if)); 4144 return; 4145 } 4146 4147 /* Compute random challenge. */ 4148 ch = (u_int32_t *)sp->myauth.challenge; 4149 microtime(&tv); 4150 seed = tv.tv_sec ^ tv.tv_usec; 4151 ch[0] = seed ^ random(); 4152 ch[1] = seed ^ random(); 4153 ch[2] = seed ^ random(); 4154 ch[3] = seed ^ random(); 4155 clen = 16; /* 4 * sizeof(u_int32_t) */ 4156 4157 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4158 4159 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4160 sizeof clen, (const char *)&clen, 4161 sizeof(sp->myauth.challenge), sp->myauth.challenge, 4162 sp->myauth.name_len, 4163 sp->myauth.name, 4164 0); 4165 } 4166 4167 /* 4168 *--------------------------------------------------------------------------* 4169 * * 4170 * The PAP implementation. * 4171 * * 4172 *--------------------------------------------------------------------------* 4173 */ 4174 /* 4175 * For PAP, we need to keep a little state also if we are the peer, not the 4176 * authenticator. This is since we don't get a request to authenticate, but 4177 * have to repeatedly authenticate ourself until we got a response (or the 4178 * retry counter is expired). 4179 */ 4180 4181 /* 4182 * Handle incoming PAP packets. */ 4183 static void 4184 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4185 { 4186 STDDCL; 4187 struct lcp_header *h; 4188 int len, x; 4189 u_char mlen; 4190 char *name, *secret; 4191 int name_len, secret_len; 4192 4193 len = m->m_pkthdr.len; 4194 if (len < 5) { 4195 if (debug) 4196 log(LOG_DEBUG, 4197 SPP_FMT "pap invalid packet length: %d bytes\n", 4198 SPP_ARGS(ifp), len); 4199 return; 4200 } 4201 h = mtod (m, struct lcp_header*); 4202 if (len > ntohs (h->len)) 4203 len = ntohs (h->len); 4204 switch (h->type) { 4205 /* PAP request is my authproto */ 4206 case PAP_REQ: 4207 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4208 /* can't do anything usefull */ 4209 printf(SPP_FMT "pap request without his name and his secret being set\n", 4210 SPP_ARGS(ifp)); 4211 break; 4212 } 4213 name = 1 + (u_char*)(h+1); 4214 name_len = name[-1]; 4215 secret = name + name_len + 1; 4216 if (name_len > len - 6 || 4217 (secret_len = secret[-1]) > len - 6 - name_len) { 4218 if (debug) { 4219 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4220 "<%s id=0x%x len=%d", 4221 SPP_ARGS(ifp), 4222 sppp_auth_type_name(PPP_PAP, h->type), 4223 h->ident, ntohs(h->len)); 4224 if (len > 4) 4225 sppp_print_bytes((u_char*)(h+1), len-4); 4226 addlog(">\n"); 4227 } 4228 break; 4229 } 4230 if (debug) { 4231 log(LOG_DEBUG, SPP_FMT "pap input(%s) " 4232 "<%s id=0x%x len=%d name=", 4233 SPP_ARGS(ifp), 4234 sppp_state_name(sp->state[IDX_PAP]), 4235 sppp_auth_type_name(PPP_PAP, h->type), 4236 h->ident, ntohs(h->len)); 4237 sppp_print_string((char*)name, name_len); 4238 addlog(" secret="); 4239 sppp_print_string((char*)secret, secret_len); 4240 addlog(">\n"); 4241 } 4242 if (name_len != sp->hisauth.name_len || 4243 secret_len != sp->hisauth.secret_len || 4244 memcmp(name, sp->hisauth.name, name_len) != 0 || 4245 memcmp(secret, sp->hisauth.secret, secret_len) != 0) { 4246 /* action scn, tld */ 4247 sp->pp_auth_failures++; 4248 mlen = sizeof(FAILMSG) - 1; 4249 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4250 sizeof mlen, (const char *)&mlen, 4251 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 4252 0); 4253 pap.tld(sp); 4254 break; 4255 } 4256 /* action sca, perhaps tlu */ 4257 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4258 sp->state[IDX_PAP] == STATE_OPENED) { 4259 mlen = sizeof(SUCCMSG) - 1; 4260 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4261 sizeof mlen, (const char *)&mlen, 4262 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 4263 0); 4264 } 4265 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4266 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4267 pap.tlu(sp); 4268 } 4269 break; 4270 4271 /* ack and nak are his authproto */ 4272 case PAP_ACK: 4273 callout_stop(&sp->pap_my_to_ch); 4274 if (debug) { 4275 log(LOG_DEBUG, SPP_FMT "pap success", 4276 SPP_ARGS(ifp)); 4277 name_len = *(char *)h; 4278 if (len > 5 && name_len) { 4279 addlog(": "); 4280 sppp_print_string((char*)(h+1), name_len); 4281 } 4282 addlog("\n"); 4283 } 4284 x = splnet(); 4285 sp->pp_auth_failures = 0; 4286 sp->pp_flags &= ~PP_NEEDAUTH; 4287 if (sp->myauth.proto == PPP_PAP && 4288 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4289 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4290 /* 4291 * We are authenticator for PAP but didn't 4292 * complete yet. Leave it to tlu to proceed 4293 * to network phase. 4294 */ 4295 splx(x); 4296 break; 4297 } 4298 splx(x); 4299 sppp_phase_network(sp); 4300 break; 4301 4302 case PAP_NAK: 4303 callout_stop(&sp->pap_my_to_ch); 4304 sp->pp_auth_failures++; 4305 if (debug) { 4306 log(LOG_INFO, SPP_FMT "pap failure", 4307 SPP_ARGS(ifp)); 4308 name_len = *(char *)h; 4309 if (len > 5 && name_len) { 4310 addlog(": "); 4311 sppp_print_string((char*)(h+1), name_len); 4312 } 4313 addlog("\n"); 4314 } else 4315 log(LOG_INFO, SPP_FMT "pap failure\n", 4316 SPP_ARGS(ifp)); 4317 /* await LCP shutdown by authenticator */ 4318 break; 4319 4320 default: 4321 /* Unknown PAP packet type -- ignore. */ 4322 if (debug) { 4323 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4324 "<0x%x id=0x%x len=%d", 4325 SPP_ARGS(ifp), 4326 h->type, h->ident, ntohs(h->len)); 4327 if (len > 4) 4328 sppp_print_bytes((u_char*)(h+1), len-4); 4329 addlog(">\n"); 4330 } 4331 break; 4332 4333 } 4334 } 4335 4336 static void 4337 sppp_pap_init(struct sppp *sp) 4338 { 4339 /* PAP doesn't have STATE_INITIAL at all. */ 4340 sp->state[IDX_PAP] = STATE_CLOSED; 4341 sp->fail_counter[IDX_PAP] = 0; 4342 sp->pp_seq[IDX_PAP] = 0; 4343 sp->pp_rseq[IDX_PAP] = 0; 4344 callout_init(&sp->ch[IDX_PAP]); 4345 callout_init(&sp->pap_my_to_ch); 4346 } 4347 4348 static void 4349 sppp_pap_open(struct sppp *sp) 4350 { 4351 if (sp->hisauth.proto == PPP_PAP && 4352 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4353 /* we are authenticator for PAP, start our timer */ 4354 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4355 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4356 } 4357 if (sp->myauth.proto == PPP_PAP) { 4358 /* we are peer, send a request, and start a timer */ 4359 pap.scr(sp); 4360 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4361 sppp_pap_my_TO, sp); 4362 } 4363 } 4364 4365 static void 4366 sppp_pap_close(struct sppp *sp) 4367 { 4368 if (sp->state[IDX_PAP] != STATE_CLOSED) 4369 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4370 } 4371 4372 /* 4373 * That's the timeout routine if we are authenticator. Since the 4374 * authenticator is basically passive in PAP, we can't do much here. 4375 */ 4376 static void 4377 sppp_pap_TO(void *cookie) 4378 { 4379 struct sppp *sp = (struct sppp *)cookie; 4380 STDDCL; 4381 int s; 4382 4383 s = splnet(); 4384 if (debug) 4385 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n", 4386 SPP_ARGS(ifp), 4387 sppp_state_name(sp->state[IDX_PAP]), 4388 sp->rst_counter[IDX_PAP]); 4389 4390 if (--sp->rst_counter[IDX_PAP] < 0) 4391 /* TO- event */ 4392 switch (sp->state[IDX_PAP]) { 4393 case STATE_REQ_SENT: 4394 pap.tld(sp); 4395 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4396 break; 4397 } 4398 else 4399 /* TO+ event, not very much we could do */ 4400 switch (sp->state[IDX_PAP]) { 4401 case STATE_REQ_SENT: 4402 /* sppp_cp_change_state() will restart the timer */ 4403 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4404 break; 4405 } 4406 4407 splx(s); 4408 } 4409 4410 /* 4411 * That's the timeout handler if we are peer. Since the peer is active, 4412 * we need to retransmit our PAP request since it is apparently lost. 4413 * XXX We should impose a max counter. 4414 */ 4415 static void 4416 sppp_pap_my_TO(void *cookie) 4417 { 4418 struct sppp *sp = (struct sppp *)cookie; 4419 STDDCL; 4420 4421 if (debug) 4422 log(LOG_DEBUG, SPP_FMT "pap peer TO\n", 4423 SPP_ARGS(ifp)); 4424 4425 pap.scr(sp); 4426 } 4427 4428 static void 4429 sppp_pap_tlu(struct sppp *sp) 4430 { 4431 STDDCL; 4432 int x; 4433 4434 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4435 4436 if (debug) 4437 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 4438 SPP_ARGS(ifp), pap.name); 4439 4440 x = splnet(); 4441 sp->pp_auth_failures = 0; 4442 /* indicate to LCP that we need to be closed down */ 4443 sp->lcp.protos |= (1 << IDX_PAP); 4444 4445 if (sp->pp_flags & PP_NEEDAUTH) { 4446 /* 4447 * Remote is authenticator, but his auth proto didn't 4448 * complete yet. Defer the transition to network 4449 * phase. 4450 */ 4451 splx(x); 4452 return; 4453 } 4454 splx(x); 4455 sppp_phase_network(sp); 4456 } 4457 4458 static void 4459 sppp_pap_tld(struct sppp *sp) 4460 { 4461 STDDCL; 4462 4463 if (debug) 4464 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp)); 4465 callout_stop(&sp->ch[IDX_PAP]); 4466 callout_stop(&sp->pap_my_to_ch); 4467 sp->lcp.protos &= ~(1 << IDX_PAP); 4468 4469 lcp.Close(sp); 4470 } 4471 4472 static void 4473 sppp_pap_scr(struct sppp *sp) 4474 { 4475 u_char idlen, pwdlen; 4476 4477 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4478 /* can't do anything usefull */ 4479 printf(SPP_FMT "pap starting without my name and secret being set\n", 4480 SPP_ARGS(&sp->pp_if)); 4481 return; 4482 } 4483 4484 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4485 pwdlen = sp->myauth.secret_len; 4486 idlen = sp->myauth.name_len; 4487 4488 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4489 sizeof idlen, (const char *)&idlen, 4490 idlen, sp->myauth.name, 4491 sizeof pwdlen, (const char *)&pwdlen, 4492 pwdlen, sp->myauth.secret, 4493 0); 4494 } 4495 4496 /* 4497 * Random miscellaneous functions. 4498 */ 4499 4500 /* 4501 * Send a PAP or CHAP proto packet. 4502 * 4503 * Varadic function, each of the elements for the ellipsis is of type 4504 * ``size_t mlen, const u_char *msg''. Processing will stop iff 4505 * mlen == 0. 4506 * NOTE: never declare variadic functions with types subject to type 4507 * promotion (i.e. u_char). This is asking for big trouble depending 4508 * on the architecture you are on... 4509 */ 4510 4511 static void 4512 sppp_auth_send(const struct cp *cp, struct sppp *sp, 4513 unsigned int type, unsigned int id, 4514 ...) 4515 { 4516 STDDCL; 4517 struct lcp_header *lh; 4518 struct mbuf *m; 4519 u_char *p; 4520 int len; 4521 size_t pkthdrlen; 4522 unsigned int mlen; 4523 const char *msg; 4524 va_list ap; 4525 4526 MGETHDR (m, M_DONTWAIT, MT_DATA); 4527 if (! m) 4528 return; 4529 m->m_pkthdr.rcvif = 0; 4530 4531 if (sp->pp_flags & PP_NOFRAMING) { 4532 *mtod(m, u_int16_t*) = htons(cp->proto); 4533 pkthdrlen = 2; 4534 lh = (struct lcp_header*)(mtod(m, u_int8_t*)+2); 4535 } else { 4536 struct ppp_header *h; 4537 h = mtod (m, struct ppp_header*); 4538 h->address = PPP_ALLSTATIONS; /* broadcast address */ 4539 h->control = PPP_UI; /* Unnumbered Info */ 4540 h->protocol = htons(cp->proto); 4541 pkthdrlen = PPP_HEADER_LEN; 4542 4543 lh = (struct lcp_header*)(h + 1); 4544 } 4545 4546 lh->type = type; 4547 lh->ident = id; 4548 p = (u_char*) (lh+1); 4549 4550 va_start(ap, id); 4551 len = 0; 4552 4553 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 4554 msg = va_arg(ap, const char *); 4555 len += mlen; 4556 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 4557 va_end(ap); 4558 m_freem(m); 4559 return; 4560 } 4561 4562 bcopy(msg, p, mlen); 4563 p += mlen; 4564 } 4565 va_end(ap); 4566 4567 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 4568 lh->len = htons (LCP_HEADER_LEN + len); 4569 4570 if (debug) { 4571 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 4572 SPP_ARGS(ifp), cp->name, 4573 sppp_auth_type_name(cp->proto, lh->type), 4574 lh->ident, ntohs(lh->len)); 4575 if (len) 4576 sppp_print_bytes((u_char*) (lh+1), len); 4577 addlog(">\n"); 4578 } 4579 if (IF_QFULL (&sp->pp_cpq)) { 4580 IF_DROP (&sp->pp_fastq); 4581 IF_DROP (&ifp->if_snd); 4582 m_freem (m); 4583 ++ifp->if_oerrors; 4584 } else 4585 IF_ENQUEUE (&sp->pp_cpq, m); 4586 if (! (ifp->if_flags & IFF_OACTIVE)) 4587 (*ifp->if_start) (ifp); 4588 ifp->if_obytes += m->m_pkthdr.len + 3; 4589 } 4590 4591 /* 4592 * Send keepalive packets, every 10 seconds. 4593 */ 4594 static void 4595 sppp_keepalive(void *dummy) 4596 { 4597 struct sppp *sp; 4598 int s; 4599 time_t now; 4600 4601 s = splnet(); 4602 now = time.tv_sec; 4603 for (sp=spppq; sp; sp=sp->pp_next) { 4604 struct ifnet *ifp = &sp->pp_if; 4605 4606 /* check idle timeout */ 4607 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 4608 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 4609 /* idle timeout is enabled for this interface */ 4610 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 4611 if (ifp->if_flags & IFF_DEBUG) 4612 printf("%s: no activitiy for %lu seconds\n", 4613 sp->pp_if.if_xname, 4614 (unsigned long)(now-sp->pp_last_activity)); 4615 lcp.Close(sp); 4616 continue; 4617 } 4618 } 4619 4620 /* Keepalive mode disabled or channel down? */ 4621 if (! (sp->pp_flags & PP_KEEPALIVE) || 4622 ! (ifp->if_flags & IFF_RUNNING)) 4623 continue; 4624 4625 /* No keepalive in PPP mode if LCP not opened yet. */ 4626 if (! (sp->pp_flags & PP_CISCO) && 4627 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) 4628 continue; 4629 4630 if (sp->pp_alivecnt == MAXALIVECNT) { 4631 /* No keepalive packets got. Stop the interface. */ 4632 if_down (ifp); 4633 IF_PURGE (&sp->pp_cpq); 4634 if (! (sp->pp_flags & PP_CISCO)) { 4635 printf("%s: LCP keepalive timed out, going to restart the connection\n", 4636 ifp->if_xname); 4637 sp->pp_alivecnt = 0; 4638 4639 /* we are down, close all open protocols */ 4640 lcp.Close(sp); 4641 4642 /* And now prepare LCP to reestablish the link, if configured to do so. */ 4643 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 4644 4645 /* Close connection imediatly, completition of this 4646 * will summon the magic needed to reestablish it. */ 4647 sp->pp_tlf(sp); 4648 continue; 4649 } 4650 } 4651 if (sp->pp_alivecnt <= MAXALIVECNT) 4652 ++sp->pp_alivecnt; 4653 if (sp->pp_flags & PP_CISCO) 4654 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ, 4655 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 4656 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 4657 int32_t nmagic = htonl (sp->lcp.magic); 4658 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 4659 sppp_cp_send (sp, PPP_LCP, ECHO_REQ, 4660 sp->lcp.echoid, 4, &nmagic); 4661 } 4662 } 4663 splx(s); 4664 callout_reset(&keepalive_ch, hz * 10, sppp_keepalive, NULL); 4665 } 4666 4667 /* 4668 * Get both IP addresses. 4669 */ 4670 static void 4671 sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, u_int32_t *srcmask) 4672 { 4673 struct ifnet *ifp = &sp->pp_if; 4674 struct ifaddr *ifa; 4675 struct sockaddr_in *si, *sm; 4676 u_int32_t ssrc, ddst; 4677 4678 sm = NULL; 4679 ssrc = ddst = 0; 4680 /* 4681 * Pick the first AF_INET address from the list, 4682 * aliases don't make any sense on a p2p link anyway. 4683 */ 4684 si = 0; 4685 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 4686 if (ifa->ifa_addr->sa_family == AF_INET) { 4687 si = (struct sockaddr_in *)ifa->ifa_addr; 4688 sm = (struct sockaddr_in *)ifa->ifa_netmask; 4689 if (si) 4690 break; 4691 } 4692 } 4693 if (ifa) { 4694 if (si && si->sin_addr.s_addr) { 4695 ssrc = si->sin_addr.s_addr; 4696 if (srcmask) 4697 *srcmask = ntohl(sm->sin_addr.s_addr); 4698 } 4699 4700 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 4701 if (si && si->sin_addr.s_addr) 4702 ddst = si->sin_addr.s_addr; 4703 } 4704 4705 if (dst) *dst = ntohl(ddst); 4706 if (src) *src = ntohl(ssrc); 4707 } 4708 4709 /* 4710 * Set IP addresses. Must be called at splnet. 4711 * If an address is 0, leave it the way it is. 4712 */ 4713 static void 4714 sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr) 4715 { 4716 STDDCL; 4717 struct ifaddr *ifa; 4718 struct sockaddr_in *si; 4719 struct sockaddr_in *dest; 4720 4721 /* 4722 * Pick the first AF_INET address from the list, 4723 * aliases don't make any sense on a p2p link anyway. 4724 */ 4725 4726 si = 0; 4727 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4728 { 4729 if (ifa->ifa_addr->sa_family == AF_INET) 4730 { 4731 si = (struct sockaddr_in *)ifa->ifa_addr; 4732 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4733 if (si) 4734 break; 4735 } 4736 } 4737 4738 if (ifa && si) 4739 { 4740 int error; 4741 struct sockaddr_in new_sin = *si; 4742 struct sockaddr_in new_dst = *dest; 4743 4744 /* 4745 * Scrub old routes now instead of calling in_ifinit with 4746 * scrub=1, because we may change the dstaddr 4747 * before the call to in_ifinit. 4748 */ 4749 in_ifscrub(ifp, ifatoia(ifa)); 4750 4751 if (myaddr != 0) 4752 new_sin.sin_addr.s_addr = htonl(myaddr); 4753 if (hisaddr != 0) { 4754 new_dst.sin_addr.s_addr = htonl(hisaddr); 4755 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) { 4756 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 4757 *dest = new_dst; /* fix dstaddr in place */ 4758 } 4759 } 4760 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4761 if(debug && error) 4762 { 4763 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addrs: in_ifinit " 4764 " failed, error=%d\n", SPP_ARGS(ifp), error); 4765 } 4766 } 4767 } 4768 4769 /* 4770 * Clear IP addresses. Must be called at splnet. 4771 */ 4772 static void 4773 sppp_clear_ip_addrs(struct sppp *sp) 4774 { 4775 struct ifnet *ifp = &sp->pp_if; 4776 struct ifaddr *ifa; 4777 struct sockaddr_in *si; 4778 struct sockaddr_in *dest; 4779 4780 u_int32_t remote; 4781 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4782 remote = sp->ipcp.saved_hisaddr; 4783 else 4784 sppp_get_ip_addrs(sp, 0, &remote, 0); 4785 4786 /* 4787 * Pick the first AF_INET address from the list, 4788 * aliases don't make any sense on a p2p link anyway. 4789 */ 4790 4791 si = 0; 4792 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4793 { 4794 if (ifa->ifa_addr->sa_family == AF_INET) 4795 { 4796 si = (struct sockaddr_in *)ifa->ifa_addr; 4797 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4798 if (si) 4799 break; 4800 } 4801 } 4802 4803 if (ifa && si) 4804 { 4805 struct sockaddr_in new_sin = *si; 4806 4807 in_ifscrub(ifp, ifatoia(ifa)); 4808 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 4809 new_sin.sin_addr.s_addr = 0; 4810 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4811 /* replace peer addr in place */ 4812 dest->sin_addr.s_addr = sp->ipcp.saved_hisaddr; 4813 in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4814 } 4815 } 4816 4817 #ifdef INET6 4818 /* 4819 * Get both IPv6 addresses. 4820 */ 4821 static void 4822 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 4823 struct in6_addr *srcmask) 4824 { 4825 struct ifnet *ifp = &sp->pp_if; 4826 struct ifaddr *ifa; 4827 struct sockaddr_in6 *si, *sm; 4828 struct in6_addr ssrc, ddst; 4829 4830 sm = NULL; 4831 memset(&ssrc, 0, sizeof(ssrc)); 4832 memset(&ddst, 0, sizeof(ddst)); 4833 /* 4834 * Pick the first link-local AF_INET6 address from the list, 4835 * aliases don't make any sense on a p2p link anyway. 4836 */ 4837 si = 0; 4838 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4839 if (ifa->ifa_addr->sa_family == AF_INET6) { 4840 si = (struct sockaddr_in6 *)ifa->ifa_addr; 4841 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 4842 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 4843 break; 4844 } 4845 if (ifa) { 4846 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 4847 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc)); 4848 if (srcmask) { 4849 bcopy(&sm->sin6_addr, srcmask, 4850 sizeof(*srcmask)); 4851 } 4852 } 4853 4854 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 4855 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 4856 bcopy(&si->sin6_addr, &ddst, sizeof(ddst)); 4857 } 4858 4859 if (dst) 4860 bcopy(&ddst, dst, sizeof(*dst)); 4861 if (src) 4862 bcopy(&ssrc, src, sizeof(*src)); 4863 } 4864 4865 #ifdef IPV6CP_MYIFID_DYN 4866 /* 4867 * Generate random ifid. 4868 */ 4869 static void 4870 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 4871 { 4872 /* TBD */ 4873 } 4874 4875 /* 4876 * Set my IPv6 address. Must be called at splnet. 4877 */ 4878 static void 4879 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 4880 { 4881 STDDCL; 4882 struct ifaddr *ifa; 4883 struct sockaddr_in6 *sin6; 4884 4885 /* 4886 * Pick the first link-local AF_INET6 address from the list, 4887 * aliases don't make any sense on a p2p link anyway. 4888 */ 4889 4890 sin6 = NULL; 4891 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4892 { 4893 if (ifa->ifa_addr->sa_family == AF_INET6) 4894 { 4895 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 4896 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 4897 break; 4898 } 4899 } 4900 4901 if (ifa && sin6) 4902 { 4903 int error; 4904 struct sockaddr_in6 new_sin6 = *sin6; 4905 4906 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr)); 4907 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 4908 if (debug && error) 4909 { 4910 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit " 4911 " failed, error=%d\n", SPP_ARGS(ifp), error); 4912 } 4913 } 4914 } 4915 #endif 4916 4917 /* 4918 * Suggest a candidate address to be used by peer. 4919 */ 4920 static void 4921 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 4922 { 4923 struct in6_addr myaddr; 4924 struct timeval tv; 4925 4926 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4927 4928 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 4929 microtime(&tv); 4930 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 4931 myaddr.s6_addr[14] ^= 0xff; 4932 myaddr.s6_addr[15] ^= 0xff; 4933 } else { 4934 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 4935 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 4936 } 4937 if (suggest) 4938 bcopy(&myaddr, suggest, sizeof(myaddr)); 4939 } 4940 #endif /*INET6*/ 4941 4942 /* 4943 * Process ioctl requests specific to the PPP interface. 4944 * Permissions have already been checked. 4945 */ 4946 static int 4947 sppp_params(struct sppp *sp, int cmd, void *data) 4948 { 4949 switch (cmd) { 4950 case SPPPGETAUTHCFG: 4951 { 4952 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 4953 int error; 4954 size_t len; 4955 4956 cfg->myauthflags = sp->myauth.flags; 4957 cfg->hisauthflags = sp->hisauth.flags; 4958 strncpy(cfg->ifname, sp->pp_if.if_xname, IFNAMSIZ); 4959 cfg->hisauth = 0; 4960 if (sp->hisauth.proto) 4961 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4962 cfg->myauth = 0; 4963 if (sp->myauth.proto) 4964 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4965 if (cfg->myname_length == 0) { 4966 if (sp->myauth.name != NULL) 4967 cfg->myname_length = sp->myauth.name_len + 1; 4968 } else { 4969 if (sp->myauth.name == NULL) { 4970 cfg->myname_length = 0; 4971 } else { 4972 len = sp->myauth.name_len + 1; 4973 if (cfg->myname_length < len) 4974 return (ENAMETOOLONG); 4975 error = copyout(sp->myauth.name, cfg->myname, len); 4976 if (error) return error; 4977 } 4978 } 4979 if (cfg->hisname_length == 0) { 4980 if(sp->hisauth.name != NULL) 4981 cfg->hisname_length = sp->hisauth.name_len + 1; 4982 } else { 4983 if (sp->hisauth.name == NULL) { 4984 cfg->hisname_length = 0; 4985 } else { 4986 len = sp->hisauth.name_len + 1; 4987 if (cfg->hisname_length < len) 4988 return (ENAMETOOLONG); 4989 error = copyout(sp->hisauth.name, cfg->hisname, len); 4990 if (error) return error; 4991 } 4992 } 4993 } 4994 break; 4995 case SPPPSETAUTHCFG: 4996 { 4997 struct spppauthcfg *cfg = (struct spppauthcfg*)data; 4998 int error; 4999 5000 if (sp->myauth.name) { 5001 free(sp->myauth.name, M_DEVBUF); 5002 sp->myauth.name = NULL; 5003 } 5004 if (sp->myauth.secret) { 5005 free(sp->myauth.secret, M_DEVBUF); 5006 sp->myauth.secret = NULL; 5007 } 5008 if (sp->hisauth.name) { 5009 free(sp->hisauth.name, M_DEVBUF); 5010 sp->hisauth.name = NULL; 5011 } 5012 if (sp->hisauth.secret) { 5013 free(sp->hisauth.secret, M_DEVBUF); 5014 sp->hisauth.secret = NULL; 5015 } 5016 5017 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5018 if (cfg->hisname_length >= MCLBYTES) 5019 return (ENAMETOOLONG); 5020 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5021 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5022 if (error) { 5023 free(sp->hisauth.name, M_DEVBUF); 5024 sp->hisauth.name = NULL; 5025 return error; 5026 } 5027 sp->hisauth.name_len = cfg->hisname_length - 1; 5028 sp->hisauth.name[sp->hisauth.name_len] = 0; 5029 } 5030 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5031 if (cfg->hissecret_length >= MCLBYTES) 5032 return (ENAMETOOLONG); 5033 sp->hisauth.secret = malloc(cfg->hissecret_length, M_DEVBUF, M_WAITOK); 5034 error = copyin(cfg->hissecret, sp->hisauth.secret, cfg->hissecret_length); 5035 if (error) { 5036 free(sp->hisauth.secret, M_DEVBUF); 5037 sp->hisauth.secret = NULL; 5038 return error; 5039 } 5040 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5041 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5042 } 5043 if (cfg->myname != NULL && cfg->myname_length > 0) { 5044 if (cfg->myname_length >= MCLBYTES) 5045 return (ENAMETOOLONG); 5046 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5047 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5048 if (error) { 5049 free(sp->myauth.name, M_DEVBUF); 5050 sp->myauth.name = NULL; 5051 return error; 5052 } 5053 sp->myauth.name_len = cfg->myname_length - 1; 5054 sp->myauth.name[sp->myauth.name_len] = 0; 5055 } 5056 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5057 if (cfg->mysecret_length >= MCLBYTES) 5058 return (ENAMETOOLONG); 5059 sp->myauth.secret = malloc(cfg->mysecret_length, M_DEVBUF, M_WAITOK); 5060 error = copyin(cfg->mysecret, sp->myauth.secret, cfg->mysecret_length); 5061 if (error) { 5062 free(sp->myauth.secret, M_DEVBUF); 5063 sp->myauth.secret = NULL; 5064 return error; 5065 } 5066 sp->myauth.secret_len = cfg->mysecret_length - 1; 5067 sp->myauth.secret[sp->myauth.secret_len] = 0; 5068 } 5069 sp->myauth.flags = cfg->myauthflags; 5070 if (cfg->myauth) 5071 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5072 sp->hisauth.flags = cfg->hisauthflags; 5073 if (cfg->hisauth) 5074 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5075 sp->pp_auth_failures = 0; 5076 if (sp->hisauth.proto != 0) 5077 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 5078 else 5079 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 5080 } 5081 break; 5082 case SPPPGETLCPCFG: 5083 { 5084 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5085 lcp->lcp_timeout = sp->lcp.timeout; 5086 } 5087 break; 5088 case SPPPSETLCPCFG: 5089 { 5090 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5091 sp->lcp.timeout = lcp->lcp_timeout; 5092 } 5093 break; 5094 case SPPPGETSTATUS: 5095 { 5096 struct spppstatus *status = (struct spppstatus *)data; 5097 status->phase = sp->pp_phase; 5098 } 5099 break; 5100 case SPPPGETIDLETO: 5101 { 5102 struct spppidletimeout *to = (struct spppidletimeout *)data; 5103 to->idle_seconds = sp->pp_idle_timeout; 5104 } 5105 break; 5106 case SPPPSETIDLETO: 5107 { 5108 struct spppidletimeout *to = (struct spppidletimeout *)data; 5109 sp->pp_idle_timeout = to->idle_seconds; 5110 } 5111 break; 5112 case SPPPSETAUTHFAILURE: 5113 { 5114 struct spppauthfailuresettings *afsettings = (struct spppauthfailuresettings *)data; 5115 sp->pp_max_auth_fail = afsettings->max_failures; 5116 sp->pp_auth_failures = 0; 5117 } 5118 break; 5119 case SPPPGETAUTHFAILURES: 5120 { 5121 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5122 stats->auth_failures = sp->pp_auth_failures; 5123 stats->max_failures = sp->pp_max_auth_fail; 5124 } 5125 break; 5126 case SPPPSETDNSOPTS: 5127 { 5128 struct spppdnssettings *req = (struct spppdnssettings*)data; 5129 sp->query_dns = req->query_dns & 3; 5130 } 5131 break; 5132 case SPPPGETDNSOPTS: 5133 { 5134 struct spppdnssettings *req = (struct spppdnssettings*)data; 5135 req->query_dns = sp->query_dns; 5136 } 5137 break; 5138 case SPPPGETDNSADDRS: 5139 { 5140 struct spppdnsaddrs *addrs = (struct spppdnsaddrs*)data; 5141 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5142 } 5143 break; 5144 default: 5145 return (EINVAL); 5146 } 5147 5148 return (0); 5149 } 5150 5151 static void 5152 sppp_phase_network(struct sppp *sp) 5153 { 5154 STDDCL; 5155 int i; 5156 u_int32_t mask; 5157 5158 sp->pp_phase = SPPP_PHASE_NETWORK; 5159 5160 if(debug) 5161 { 5162 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 5163 sppp_phase_name(sp->pp_phase)); 5164 } 5165 5166 /* Notify NCPs now. */ 5167 for (i = 0; i < IDX_COUNT; i++) 5168 if ((cps[i])->flags & CP_NCP) 5169 (cps[i])->Open(sp); 5170 5171 /* Send Up events to all NCPs. */ 5172 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5173 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) 5174 (cps[i])->Up(sp); 5175 5176 /* if no NCP is starting, all this was in vain, close down */ 5177 sppp_lcp_check_and_close(sp); 5178 } 5179 5180 5181 static const char * 5182 sppp_cp_type_name(u_char type) 5183 { 5184 static char buf[12]; 5185 switch (type) { 5186 case CONF_REQ: return "conf-req"; 5187 case CONF_ACK: return "conf-ack"; 5188 case CONF_NAK: return "conf-nak"; 5189 case CONF_REJ: return "conf-rej"; 5190 case TERM_REQ: return "term-req"; 5191 case TERM_ACK: return "term-ack"; 5192 case CODE_REJ: return "code-rej"; 5193 case PROTO_REJ: return "proto-rej"; 5194 case ECHO_REQ: return "echo-req"; 5195 case ECHO_REPLY: return "echo-reply"; 5196 case DISC_REQ: return "discard-req"; 5197 } 5198 sprintf (buf, "0x%x", type); 5199 return buf; 5200 } 5201 5202 static const char * 5203 sppp_auth_type_name(u_short proto, u_char type) 5204 { 5205 static char buf[12]; 5206 switch (proto) { 5207 case PPP_CHAP: 5208 switch (type) { 5209 case CHAP_CHALLENGE: return "challenge"; 5210 case CHAP_RESPONSE: return "response"; 5211 case CHAP_SUCCESS: return "success"; 5212 case CHAP_FAILURE: return "failure"; 5213 } 5214 case PPP_PAP: 5215 switch (type) { 5216 case PAP_REQ: return "req"; 5217 case PAP_ACK: return "ack"; 5218 case PAP_NAK: return "nak"; 5219 } 5220 } 5221 sprintf (buf, "0x%x", type); 5222 return buf; 5223 } 5224 5225 static const char * 5226 sppp_lcp_opt_name(u_char opt) 5227 { 5228 static char buf[12]; 5229 switch (opt) { 5230 case LCP_OPT_MRU: return "mru"; 5231 case LCP_OPT_ASYNC_MAP: return "async-map"; 5232 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 5233 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 5234 case LCP_OPT_MAGIC: return "magic"; 5235 case LCP_OPT_PROTO_COMP: return "proto-comp"; 5236 case LCP_OPT_ADDR_COMP: return "addr-comp"; 5237 } 5238 sprintf (buf, "0x%x", opt); 5239 return buf; 5240 } 5241 5242 static const char * 5243 sppp_ipcp_opt_name(u_char opt) 5244 { 5245 static char buf[12]; 5246 switch (opt) { 5247 case IPCP_OPT_ADDRESSES: return "addresses"; 5248 case IPCP_OPT_COMPRESSION: return "compression"; 5249 case IPCP_OPT_ADDRESS: return "address"; 5250 } 5251 sprintf (buf, "0x%x", opt); 5252 return buf; 5253 } 5254 5255 #ifdef INET6 5256 static const char * 5257 sppp_ipv6cp_opt_name(u_char opt) 5258 { 5259 static char buf[12]; 5260 switch (opt) { 5261 case IPV6CP_OPT_IFID: return "ifid"; 5262 case IPV6CP_OPT_COMPRESSION: return "compression"; 5263 } 5264 sprintf (buf, "0x%x", opt); 5265 return buf; 5266 } 5267 #endif 5268 5269 static const char * 5270 sppp_state_name(int state) 5271 { 5272 switch (state) { 5273 case STATE_INITIAL: return "initial"; 5274 case STATE_STARTING: return "starting"; 5275 case STATE_CLOSED: return "closed"; 5276 case STATE_STOPPED: return "stopped"; 5277 case STATE_CLOSING: return "closing"; 5278 case STATE_STOPPING: return "stopping"; 5279 case STATE_REQ_SENT: return "req-sent"; 5280 case STATE_ACK_RCVD: return "ack-rcvd"; 5281 case STATE_ACK_SENT: return "ack-sent"; 5282 case STATE_OPENED: return "opened"; 5283 } 5284 return "illegal"; 5285 } 5286 5287 static const char * 5288 sppp_phase_name(int phase) 5289 { 5290 switch (phase) { 5291 case SPPP_PHASE_DEAD: return "dead"; 5292 case SPPP_PHASE_ESTABLISH: return "establish"; 5293 case SPPP_PHASE_TERMINATE: return "terminate"; 5294 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 5295 case SPPP_PHASE_NETWORK: return "network"; 5296 } 5297 return "illegal"; 5298 } 5299 5300 static const char * 5301 sppp_proto_name(u_short proto) 5302 { 5303 static char buf[12]; 5304 switch (proto) { 5305 case PPP_LCP: return "lcp"; 5306 case PPP_IPCP: return "ipcp"; 5307 case PPP_PAP: return "pap"; 5308 case PPP_CHAP: return "chap"; 5309 case PPP_IPV6CP: return "ipv6cp"; 5310 } 5311 sprintf(buf, "0x%x", (unsigned)proto); 5312 return buf; 5313 } 5314 5315 static void 5316 sppp_print_bytes(const u_char *p, u_short len) 5317 { 5318 addlog(" %02x", *p++); 5319 while (--len > 0) 5320 addlog("-%02x", *p++); 5321 } 5322 5323 static void 5324 sppp_print_string(const char *p, u_short len) 5325 { 5326 u_char c; 5327 5328 while (len-- > 0) { 5329 c = *p++; 5330 /* 5331 * Print only ASCII chars directly. RFC 1994 recommends 5332 * using only them, but we don't rely on it. */ 5333 if (c < ' ' || c > '~') 5334 addlog("\\x%x", c); 5335 else 5336 addlog("%c", c); 5337 } 5338 } 5339 5340 static const char * 5341 sppp_dotted_quad(u_int32_t addr) 5342 { 5343 static char s[16]; 5344 sprintf(s, "%d.%d.%d.%d", 5345 (int)((addr >> 24) & 0xff), 5346 (int)((addr >> 16) & 0xff), 5347 (int)((addr >> 8) & 0xff), 5348 (int)(addr & 0xff)); 5349 return s; 5350 } 5351 5352 /* a dummy, used to drop uninteresting events */ 5353 static void 5354 sppp_null(struct sppp *unused) 5355 { 5356 /* do just nothing */ 5357 } 5358 /* 5359 * This file is large. Tell emacs to highlight it nevertheless. 5360 * 5361 * Local Variables: 5362 * hilit-auto-highlight-maxout: 120000 5363 * End: 5364 */ 5365
Indexes created Wed Oct 15 16:09:53 GMT 2025