if_spppsubr.c revision 1.46.4.14
1 /* $NetBSD: if_spppsubr.c,v 1.46.4.14 2003/02/07 18:32:29 tron 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 1.46.4.14 2003/02/07 18:32:29 tron 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 #include <sys/inttypes.h> 50 51 #include <net/if.h> 52 #include <net/netisr.h> 53 #include <net/if_types.h> 54 #include <net/route.h> 55 #include <net/ppp_defs.h> 56 57 #include <machine/stdarg.h> 58 59 #include <netinet/in.h> 60 #include <netinet/in_systm.h> 61 #include <netinet/in_var.h> 62 #ifdef INET 63 #include <netinet/ip.h> 64 #include <netinet/tcp.h> 65 #endif 66 #include <net/ethertypes.h> 67 68 #ifdef IPX 69 #include <netipx/ipx.h> 70 #include <netipx/ipx_if.h> 71 #endif 72 73 #ifdef NS 74 #include <netns/ns.h> 75 #include <netns/ns_if.h> 76 #endif 77 78 #ifdef ISO 79 #include <netiso/argo_debug.h> 80 #include <netiso/iso.h> 81 #include <netiso/iso_var.h> 82 #include <netiso/iso_snpac.h> 83 #endif 84 85 #include <net/if_sppp.h> 86 #include <net/if_spppvar.h> 87 88 #define LCP_KEEPALIVE_INTERVAL 10 /* seconds */ 89 #define MAXALIVECNT 3 /* max. missed alive packets */ 90 #define DEFAULT_MAX_AUTH_FAILURES 5 /* max. auth. failures */ 91 92 /* 93 * Interface flags that can be set in an ifconfig command. 94 * 95 * Setting link0 will make the link passive, i.e. it will be marked 96 * as being administrative openable, but won't be opened to begin 97 * with. Incoming calls will be answered, or subsequent calls with 98 * -link1 will cause the administrative open of the LCP layer. 99 * 100 * Setting link1 will cause the link to auto-dial only as packets 101 * arrive to be sent. 102 * 103 * Setting IFF_DEBUG will syslog the option negotiation and state 104 * transitions at level kern.debug. Note: all logs consistently look 105 * like 106 * 107 * <if-name><unit>: <proto-name> <additional info...> 108 * 109 * with <if-name><unit> being something like "bppp0", and <proto-name> 110 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. 111 */ 112 113 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 114 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 115 116 #define CONF_REQ 1 /* PPP configure request */ 117 #define CONF_ACK 2 /* PPP configure acknowledge */ 118 #define CONF_NAK 3 /* PPP configure negative ack */ 119 #define CONF_REJ 4 /* PPP configure reject */ 120 #define TERM_REQ 5 /* PPP terminate request */ 121 #define TERM_ACK 6 /* PPP terminate acknowledge */ 122 #define CODE_REJ 7 /* PPP code reject */ 123 #define PROTO_REJ 8 /* PPP protocol reject */ 124 #define ECHO_REQ 9 /* PPP echo request */ 125 #define ECHO_REPLY 10 /* PPP echo reply */ 126 #define DISC_REQ 11 /* PPP discard request */ 127 128 #define LCP_OPT_MRU 1 /* maximum receive unit */ 129 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 130 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 131 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 132 #define LCP_OPT_MAGIC 5 /* magic number */ 133 #define LCP_OPT_RESERVED 6 /* reserved */ 134 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 135 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 136 137 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 138 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol */ 139 #define IPCP_OPT_ADDRESS 3 /* local IP address */ 140 #define IPCP_OPT_PRIMDNS 129 /* primary remote dns address */ 141 #define IPCP_OPT_SECDNS 131 /* secondary remote dns address */ 142 143 #define IPV6CP_OPT_IFID 1 /* interface identifier */ 144 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 145 146 #define PAP_REQ 1 /* PAP name/password request */ 147 #define PAP_ACK 2 /* PAP acknowledge */ 148 #define PAP_NAK 3 /* PAP fail */ 149 150 #define CHAP_CHALLENGE 1 /* CHAP challenge request */ 151 #define CHAP_RESPONSE 2 /* CHAP challenge response */ 152 #define CHAP_SUCCESS 3 /* CHAP response ok */ 153 #define CHAP_FAILURE 4 /* CHAP response failed */ 154 155 #define CHAP_MD5 5 /* hash algorithm - MD5 */ 156 157 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 158 #define CISCO_UNICAST 0x0f /* Cisco unicast address */ 159 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 160 #define CISCO_ADDR_REQ 0 /* Cisco address request */ 161 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 162 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 163 164 /* states are named and numbered according to RFC 1661 */ 165 #define STATE_INITIAL 0 166 #define STATE_STARTING 1 167 #define STATE_CLOSED 2 168 #define STATE_STOPPED 3 169 #define STATE_CLOSING 4 170 #define STATE_STOPPING 5 171 #define STATE_REQ_SENT 6 172 #define STATE_ACK_RCVD 7 173 #define STATE_ACK_SENT 8 174 #define STATE_OPENED 9 175 176 struct ppp_header { 177 u_char address; 178 u_char control; 179 u_short protocol; 180 } __attribute__((__packed__)); 181 #define PPP_HEADER_LEN sizeof (struct ppp_header) 182 183 struct lcp_header { 184 u_char type; 185 u_char ident; 186 u_short len; 187 } __attribute__((__packed__)); 188 #define LCP_HEADER_LEN sizeof (struct lcp_header) 189 190 struct cisco_packet { 191 u_int32_t type; 192 u_int32_t par1; 193 u_int32_t par2; 194 u_short rel; 195 u_short time0; 196 u_short time1; 197 } __attribute__((__packed__)); 198 #define CISCO_PACKET_LEN 18 199 200 /* 201 * We follow the spelling and capitalization of RFC 1661 here, to make 202 * it easier comparing with the standard. Please refer to this RFC in 203 * case you can't make sense out of these abbreviation; it will also 204 * explain the semantics related to the various events and actions. 205 */ 206 struct cp { 207 u_short proto; /* PPP control protocol number */ 208 u_char protoidx; /* index into state table in struct sppp */ 209 u_char flags; 210 #define CP_LCP 0x01 /* this is the LCP */ 211 #define CP_AUTH 0x02 /* this is an authentication protocol */ 212 #define CP_NCP 0x04 /* this is a NCP */ 213 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 214 const char *name; /* name of this control protocol */ 215 /* event handlers */ 216 void (*Up)(struct sppp *sp); 217 void (*Down)(struct sppp *sp); 218 void (*Open)(struct sppp *sp); 219 void (*Close)(struct sppp *sp); 220 void (*TO)(void *sp); 221 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len); 222 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len); 223 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len); 224 /* actions */ 225 void (*tlu)(struct sppp *sp); 226 void (*tld)(struct sppp *sp); 227 void (*tls)(struct sppp *sp); 228 void (*tlf)(struct sppp *sp); 229 void (*scr)(struct sppp *sp); 230 }; 231 232 static struct sppp *spppq; 233 static struct callout keepalive_ch; 234 235 #ifdef __FreeBSD__ 236 #define SPP_FMT "%s%d: " 237 #define SPP_ARGS(ifp) (ifp)->if_name, (ifp)->if_unit 238 #else 239 #define SPP_FMT "%s: " 240 #define SPP_ARGS(ifp) (ifp)->if_xname 241 #endif 242 243 #ifdef INET 244 /* 245 * The following disgusting hack gets around the problem that IP TOS 246 * can't be set yet. We want to put "interactive" traffic on a high 247 * priority queue. To decide if traffic is interactive, we check that 248 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 249 * 250 * XXX is this really still necessary? - joerg - 251 */ 252 static u_short interactive_ports[8] = { 253 0, 513, 0, 0, 254 0, 21, 0, 23, 255 }; 256 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 257 #endif 258 259 /* almost every function needs these */ 260 #define STDDCL \ 261 struct ifnet *ifp = &sp->pp_if; \ 262 int debug = ifp->if_flags & IFF_DEBUG 263 264 static int sppp_output(struct ifnet *ifp, struct mbuf *m, 265 struct sockaddr *dst, struct rtentry *rt); 266 267 static void sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2); 268 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m); 269 270 static void sppp_cp_input(const struct cp *cp, struct sppp *sp, 271 struct mbuf *m); 272 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 273 u_char ident, u_short len, void *data); 274 /* static void sppp_cp_timeout(void *arg); */ 275 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp, 276 int newstate); 277 static void sppp_auth_send(const struct cp *cp, 278 struct sppp *sp, unsigned int type, unsigned int id, 279 ...); 280 281 static void sppp_up_event(const struct cp *cp, struct sppp *sp); 282 static void sppp_down_event(const struct cp *cp, struct sppp *sp); 283 static void sppp_open_event(const struct cp *cp, struct sppp *sp); 284 static void sppp_close_event(const struct cp *cp, struct sppp *sp); 285 static void sppp_to_event(const struct cp *cp, struct sppp *sp); 286 287 static void sppp_null(struct sppp *sp); 288 289 static void sppp_lcp_init(struct sppp *sp); 290 static void sppp_lcp_up(struct sppp *sp); 291 static void sppp_lcp_down(struct sppp *sp); 292 static void sppp_lcp_open(struct sppp *sp); 293 static void sppp_lcp_close(struct sppp *sp); 294 static void sppp_lcp_TO(void *sp); 295 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 296 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 297 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 298 static void sppp_lcp_tlu(struct sppp *sp); 299 static void sppp_lcp_tld(struct sppp *sp); 300 static void sppp_lcp_tls(struct sppp *sp); 301 static void sppp_lcp_tlf(struct sppp *sp); 302 static void sppp_lcp_scr(struct sppp *sp); 303 static void sppp_lcp_check_and_close(struct sppp *sp); 304 static int sppp_ncp_check(struct sppp *sp); 305 306 static void sppp_ipcp_init(struct sppp *sp); 307 static void sppp_ipcp_up(struct sppp *sp); 308 static void sppp_ipcp_down(struct sppp *sp); 309 static void sppp_ipcp_open(struct sppp *sp); 310 static void sppp_ipcp_close(struct sppp *sp); 311 static void sppp_ipcp_TO(void *sp); 312 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 313 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 314 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 315 static void sppp_ipcp_tlu(struct sppp *sp); 316 static void sppp_ipcp_tld(struct sppp *sp); 317 static void sppp_ipcp_tls(struct sppp *sp); 318 static void sppp_ipcp_tlf(struct sppp *sp); 319 static void sppp_ipcp_scr(struct sppp *sp); 320 321 static void sppp_ipv6cp_init(struct sppp *sp); 322 static void sppp_ipv6cp_up(struct sppp *sp); 323 static void sppp_ipv6cp_down(struct sppp *sp); 324 static void sppp_ipv6cp_open(struct sppp *sp); 325 static void sppp_ipv6cp_close(struct sppp *sp); 326 static void sppp_ipv6cp_TO(void *sp); 327 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len); 328 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 329 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 330 static void sppp_ipv6cp_tlu(struct sppp *sp); 331 static void sppp_ipv6cp_tld(struct sppp *sp); 332 static void sppp_ipv6cp_tls(struct sppp *sp); 333 static void sppp_ipv6cp_tlf(struct sppp *sp); 334 static void sppp_ipv6cp_scr(struct sppp *sp); 335 336 static void sppp_pap_input(struct sppp *sp, struct mbuf *m); 337 static void sppp_pap_init(struct sppp *sp); 338 static void sppp_pap_open(struct sppp *sp); 339 static void sppp_pap_close(struct sppp *sp); 340 static void sppp_pap_TO(void *sp); 341 static void sppp_pap_my_TO(void *sp); 342 static void sppp_pap_tlu(struct sppp *sp); 343 static void sppp_pap_tld(struct sppp *sp); 344 static void sppp_pap_scr(struct sppp *sp); 345 346 static void sppp_chap_input(struct sppp *sp, struct mbuf *m); 347 static void sppp_chap_init(struct sppp *sp); 348 static void sppp_chap_open(struct sppp *sp); 349 static void sppp_chap_close(struct sppp *sp); 350 static void sppp_chap_TO(void *sp); 351 static void sppp_chap_tlu(struct sppp *sp); 352 static void sppp_chap_tld(struct sppp *sp); 353 static void sppp_chap_scr(struct sppp *sp); 354 355 static const char *sppp_auth_type_name(u_short proto, u_char type); 356 static const char *sppp_cp_type_name(u_char type); 357 static const char *sppp_dotted_quad(u_int32_t addr); 358 static const char *sppp_ipcp_opt_name(u_char opt); 359 #ifdef INET6 360 static const char *sppp_ipv6cp_opt_name(u_char opt); 361 #endif 362 static const char *sppp_lcp_opt_name(u_char opt); 363 static const char *sppp_phase_name(int phase); 364 static const char *sppp_proto_name(u_short proto); 365 static const char *sppp_state_name(int state); 366 static int sppp_params(struct sppp *sp, int cmd, void *data); 367 static void sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, 368 u_int32_t *srcmask); 369 static void sppp_keepalive(void *dummy); 370 static void sppp_phase_network(struct sppp *sp); 371 static void sppp_print_bytes(const u_char *p, u_short len); 372 static void sppp_print_string(const char *p, u_short len); 373 static void sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr); 374 static void sppp_clear_ip_addrs(struct sppp *sp); 375 #ifdef INET6 376 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, 377 struct in6_addr *dst, struct in6_addr *srcmask); 378 #ifdef IPV6CP_MYIFID_DYN 379 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src); 380 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src); 381 #endif 382 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src); 383 #endif 384 385 /* our control protocol descriptors */ 386 static const struct cp lcp = { 387 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 388 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close, 389 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, 390 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, 391 sppp_lcp_scr 392 }; 393 394 static const struct cp ipcp = { 395 PPP_IPCP, IDX_IPCP, 396 #ifdef INET 397 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 398 #else 399 0, 400 #endif 401 "ipcp", 402 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close, 403 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, 404 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf, 405 sppp_ipcp_scr 406 }; 407 408 static const struct cp ipv6cp = { 409 PPP_IPV6CP, IDX_IPV6CP, 410 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 411 CP_NCP, 412 #else 413 0, 414 #endif 415 "ipv6cp", 416 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close, 417 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak, 418 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf, 419 sppp_ipv6cp_scr 420 }; 421 422 static const struct cp pap = { 423 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 424 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close, 425 sppp_pap_TO, 0, 0, 0, 426 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null, 427 sppp_pap_scr 428 }; 429 430 static const struct cp chap = { 431 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 432 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close, 433 sppp_chap_TO, 0, 0, 0, 434 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null, 435 sppp_chap_scr 436 }; 437 438 static const struct cp *cps[IDX_COUNT] = { 439 &lcp, /* IDX_LCP */ 440 &ipcp, /* IDX_IPCP */ 441 &ipv6cp, /* IDX_IPV6CP */ 442 &pap, /* IDX_PAP */ 443 &chap, /* IDX_CHAP */ 444 }; 445 446 447 /* 448 * Exported functions, comprising our interface to the lower layer. 449 */ 450 451 /* 452 * Process the received packet. 453 */ 454 void 455 sppp_input(struct ifnet *ifp, struct mbuf *m) 456 { 457 struct ppp_header *h = NULL; 458 struct ifqueue *inq = 0; 459 u_int16_t protocol; 460 int s; 461 struct sppp *sp = (struct sppp *)ifp; 462 int debug = ifp->if_flags & IFF_DEBUG; 463 464 if (ifp->if_flags & IFF_UP) 465 /* Count received bytes, add hardware framing */ 466 ifp->if_ibytes += m->m_pkthdr.len + sp->pp_framebytes; 467 468 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 469 /* Too small packet, drop it. */ 470 if (debug) 471 log(LOG_DEBUG, 472 SPP_FMT "input packet is too small, %d bytes\n", 473 SPP_ARGS(ifp), m->m_pkthdr.len); 474 drop: 475 ++ifp->if_ierrors; 476 ++ifp->if_iqdrops; 477 m_freem(m); 478 return; 479 } 480 481 if (sp->pp_flags & PP_NOFRAMING) { 482 memcpy(&protocol, mtod(m, void *), 2); 483 protocol = ntohs(protocol); 484 m_adj(m, 2); 485 } else { 486 487 /* Get PPP header. */ 488 h = mtod(m, struct ppp_header *); 489 m_adj(m, PPP_HEADER_LEN); 490 491 switch (h->address) { 492 case PPP_ALLSTATIONS: 493 if (h->control != PPP_UI) 494 goto invalid; 495 if (sp->pp_flags & PP_CISCO) { 496 if (debug) 497 log(LOG_DEBUG, 498 SPP_FMT "PPP packet in Cisco mode " 499 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 500 SPP_ARGS(ifp), 501 h->address, h->control, ntohs(h->protocol)); 502 goto drop; 503 } 504 break; 505 case CISCO_MULTICAST: 506 case CISCO_UNICAST: 507 /* Don't check the control field here (RFC 1547). */ 508 if (! (sp->pp_flags & PP_CISCO)) { 509 if (debug) 510 log(LOG_DEBUG, 511 SPP_FMT "Cisco packet in PPP mode " 512 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 513 SPP_ARGS(ifp), 514 h->address, h->control, ntohs(h->protocol)); 515 goto drop; 516 } 517 switch (ntohs(h->protocol)) { 518 default: 519 ++ifp->if_noproto; 520 goto invalid; 521 case CISCO_KEEPALIVE: 522 sppp_cisco_input((struct sppp *) ifp, m); 523 m_freem(m); 524 return; 525 #ifdef INET 526 case ETHERTYPE_IP: 527 schednetisr(NETISR_IP); 528 inq = &ipintrq; 529 break; 530 #endif 531 #ifdef INET6 532 case ETHERTYPE_IPV6: 533 schednetisr(NETISR_IPV6); 534 inq = &ip6intrq; 535 break; 536 #endif 537 #ifdef IPX 538 case ETHERTYPE_IPX: 539 schednetisr(NETISR_IPX); 540 inq = &ipxintrq; 541 break; 542 #endif 543 #ifdef NS 544 case ETHERTYPE_NS: 545 schednetisr(NETISR_NS); 546 inq = &nsintrq; 547 break; 548 #endif 549 } 550 goto queue_pkt; 551 default: /* Invalid PPP packet. */ 552 invalid: 553 if (debug) 554 log(LOG_DEBUG, 555 SPP_FMT "invalid input packet " 556 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 557 SPP_ARGS(ifp), 558 h->address, h->control, ntohs(h->protocol)); 559 goto drop; 560 } 561 protocol = ntohs(h->protocol); 562 } 563 564 switch (protocol) { 565 default: 566 if (sp->state[IDX_LCP] == STATE_OPENED) { 567 u_int16_t prot = htons(protocol); 568 sppp_cp_send(sp, PPP_LCP, PROTO_REJ, 569 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2, 570 &prot); 571 } 572 if (debug) 573 log(LOG_DEBUG, 574 SPP_FMT "invalid input protocol " 575 "<proto=0x%x>\n", SPP_ARGS(ifp), ntohs(protocol)); 576 ++ifp->if_noproto; 577 goto drop; 578 case PPP_LCP: 579 sppp_cp_input(&lcp, sp, m); 580 m_freem(m); 581 return; 582 case PPP_PAP: 583 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 584 sppp_pap_input(sp, m); 585 m_freem(m); 586 return; 587 case PPP_CHAP: 588 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 589 sppp_chap_input(sp, m); 590 m_freem(m); 591 return; 592 #ifdef INET 593 case PPP_IPCP: 594 if (sp->pp_phase == SPPP_PHASE_NETWORK) 595 sppp_cp_input(&ipcp, sp, m); 596 m_freem(m); 597 return; 598 case PPP_IP: 599 if (sp->state[IDX_IPCP] == STATE_OPENED) { 600 schednetisr(NETISR_IP); 601 inq = &ipintrq; 602 sp->pp_last_activity = mono_time.tv_sec; 603 } 604 break; 605 #endif 606 #ifdef INET6 607 case PPP_IPV6CP: 608 if (sp->pp_phase == SPPP_PHASE_NETWORK) 609 sppp_cp_input(&ipv6cp, sp, m); 610 m_freem(m); 611 return; 612 613 case PPP_IPV6: 614 if (sp->state[IDX_IPV6CP] == STATE_OPENED) { 615 schednetisr(NETISR_IPV6); 616 inq = &ip6intrq; 617 sp->pp_last_activity = mono_time.tv_sec; 618 } 619 break; 620 #endif 621 #ifdef IPX 622 case PPP_IPX: 623 /* IPX IPXCP not implemented yet */ 624 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 625 schednetisr(NETISR_IPX); 626 inq = &ipxintrq; 627 } 628 break; 629 #endif 630 #ifdef NS 631 case PPP_XNS: 632 /* XNS IDPCP not implemented yet */ 633 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 634 schednetisr(NETISR_NS); 635 inq = &nsintrq; 636 } 637 break; 638 #endif 639 #ifdef ISO 640 case PPP_ISO: 641 /* OSI NLCP not implemented yet */ 642 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 643 schednetisr(NETISR_ISO); 644 inq = &clnlintrq; 645 } 646 break; 647 #endif 648 } 649 650 queue_pkt: 651 if (! (ifp->if_flags & IFF_UP) || ! inq) 652 goto drop; 653 654 /* Check queue. */ 655 s = splnet(); 656 if (IF_QFULL(inq)) { 657 /* Queue overflow. */ 658 IF_DROP(inq); 659 splx(s); 660 if (debug) 661 log(LOG_DEBUG, SPP_FMT "protocol queue overflow\n", 662 SPP_ARGS(ifp)); 663 goto drop; 664 } 665 IF_ENQUEUE(inq, m); 666 splx(s); 667 } 668 669 /* 670 * Enqueue transmit packet. 671 */ 672 static int 673 sppp_output(struct ifnet *ifp, struct mbuf *m, 674 struct sockaddr *dst, struct rtentry *rt) 675 { 676 struct sppp *sp = (struct sppp *) ifp; 677 struct ppp_header *h = NULL; 678 struct ifqueue *ifq = NULL; /* XXX */ 679 int s, len, rv = 0; 680 u_int16_t protocol; 681 ALTQ_DECL(struct altq_pktattr pktattr;) 682 683 s = splnet(); 684 685 sp->pp_last_activity = mono_time.tv_sec; 686 687 if ((ifp->if_flags & IFF_UP) == 0 || 688 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 689 m_freem(m); 690 splx(s); 691 return (ENETDOWN); 692 } 693 694 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 695 /* 696 * Interface is not yet running, but auto-dial. Need 697 * to start LCP for it. 698 */ 699 ifp->if_flags |= IFF_RUNNING; 700 splx(s); 701 lcp.Open(sp); 702 s = splnet(); 703 } 704 705 /* 706 * If the queueing discipline needs packet classification, 707 * do it before prepending link headers. 708 */ 709 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr); 710 711 #ifdef INET 712 if (dst->sa_family == AF_INET) { 713 struct ip *ip = NULL; 714 struct tcphdr *th = NULL; 715 716 if (m->m_len >= sizeof(struct ip)) { 717 ip = mtod(m, struct ip *); 718 if (ip->ip_p == IPPROTO_TCP && 719 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + 720 sizeof(struct tcphdr)) { 721 th = (struct tcphdr *) 722 ((caddr_t)ip + (ip->ip_hl << 2)); 723 } 724 } else 725 ip = NULL; 726 727 /* 728 * When using dynamic local IP address assignment by using 729 * 0.0.0.0 as a local address, the first TCP session will 730 * not connect because the local TCP checksum is computed 731 * using 0.0.0.0 which will later become our real IP address 732 * so the TCP checksum computed at the remote end will 733 * become invalid. So we 734 * - don't let packets with src ip addr 0 thru 735 * - we flag TCP packets with src ip 0 as an error 736 */ 737 if (ip && ip->ip_src.s_addr == INADDR_ANY) { 738 u_int8_t proto = ip->ip_p; 739 740 m_freem(m); 741 splx(s); 742 if (proto == IPPROTO_TCP) 743 return (EADDRNOTAVAIL); 744 else 745 return (0); 746 } 747 748 /* 749 * Put low delay, telnet, rlogin and ftp control packets 750 * in front of the queue. 751 */ 752 753 if (!IF_QFULL(&sp->pp_fastq) && 754 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 755 (th && (INTERACTIVE(ntohs(th->th_sport)) || 756 INTERACTIVE(ntohs(th->th_dport)))))) 757 ifq = &sp->pp_fastq; 758 } 759 #endif 760 761 #ifdef INET6 762 if (dst->sa_family == AF_INET6) { 763 /* XXX do something tricky here? */ 764 } 765 #endif 766 767 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 768 /* 769 * Prepend general data packet PPP header. For now, IP only. 770 */ 771 M_PREPEND(m, PPP_HEADER_LEN, M_DONTWAIT); 772 if (! m) { 773 if (ifp->if_flags & IFF_DEBUG) 774 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 775 SPP_ARGS(ifp)); 776 ++ifp->if_oerrors; 777 splx(s); 778 return (ENOBUFS); 779 } 780 /* 781 * May want to check size of packet 782 * (albeit due to the implementation it's always enough) 783 */ 784 h = mtod(m, struct ppp_header *); 785 if (sp->pp_flags & PP_CISCO) { 786 h->address = CISCO_UNICAST; /* unicast address */ 787 h->control = 0; 788 } else { 789 h->address = PPP_ALLSTATIONS; /* broadcast address */ 790 h->control = PPP_UI; /* Unnumbered Info */ 791 } 792 } 793 794 switch (dst->sa_family) { 795 #ifdef INET 796 case AF_INET: /* Internet Protocol */ 797 if (sp->pp_flags & PP_CISCO) 798 protocol = htons(ETHERTYPE_IP); 799 else { 800 /* 801 * Don't choke with an ENETDOWN early. It's 802 * possible that we just started dialing out, 803 * so don't drop the packet immediately. If 804 * we notice that we run out of buffer space 805 * below, we will however remember that we are 806 * not ready to carry IP packets, and return 807 * ENETDOWN, as opposed to ENOBUFS. 808 */ 809 protocol = htons(PPP_IP); 810 if (sp->state[IDX_IPCP] != STATE_OPENED) 811 rv = ENETDOWN; 812 } 813 break; 814 #endif 815 #ifdef INET6 816 case AF_INET6: /* Internet Protocol version 6 */ 817 if (sp->pp_flags & PP_CISCO) 818 protocol = htons(ETHERTYPE_IPV6); 819 else { 820 /* 821 * Don't choke with an ENETDOWN early. It's 822 * possible that we just started dialing out, 823 * so don't drop the packet immediately. If 824 * we notice that we run out of buffer space 825 * below, we will however remember that we are 826 * not ready to carry IP packets, and return 827 * ENETDOWN, as opposed to ENOBUFS. 828 */ 829 protocol = htons(PPP_IPV6); 830 if (sp->state[IDX_IPV6CP] != STATE_OPENED) 831 rv = ENETDOWN; 832 } 833 break; 834 #endif 835 #ifdef NS 836 case AF_NS: /* Xerox NS Protocol */ 837 protocol = htons((sp->pp_flags & PP_CISCO) ? 838 ETHERTYPE_NS : PPP_XNS); 839 break; 840 #endif 841 #ifdef IPX 842 case AF_IPX: /* Novell IPX Protocol */ 843 protocol = htons((sp->pp_flags & PP_CISCO) ? 844 ETHERTYPE_IPX : PPP_IPX); 845 break; 846 #endif 847 #ifdef ISO 848 case AF_ISO: /* ISO OSI Protocol */ 849 if (sp->pp_flags & PP_CISCO) 850 goto nosupport; 851 protocol = htons(PPP_ISO); 852 break; 853 nosupport: 854 #endif 855 default: 856 m_freem(m); 857 ++ifp->if_oerrors; 858 splx(s); 859 return (EAFNOSUPPORT); 860 } 861 862 if (sp->pp_flags & PP_NOFRAMING) { 863 M_PREPEND(m, 2, M_DONTWAIT); 864 if (m == NULL) { 865 if (ifp->if_flags & IFF_DEBUG) 866 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 867 SPP_ARGS(ifp)); 868 ++ifp->if_oerrors; 869 splx(s); 870 return (ENOBUFS); 871 } 872 *mtod(m, u_int16_t *) = protocol; 873 } else { 874 h->protocol = protocol; 875 } 876 877 /* 878 * Queue message on interface, and start output if interface 879 * not yet active. 880 */ 881 len = m->m_pkthdr.len; 882 if (ifq != NULL 883 #ifdef ALTQ 884 && ALTQ_IS_ENABLED(&ifp->if_snd) == 0 885 #endif 886 ) { 887 if (IF_QFULL(ifq)) { 888 IF_DROP(&ifp->if_snd); 889 m_freem(m); 890 if (rv == 0) 891 rv = ENOBUFS; 892 } 893 else 894 IF_ENQUEUE(ifq, m); 895 } else 896 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, rv); 897 if (rv != 0) { 898 ++ifp->if_oerrors; 899 splx(s); 900 return (rv); 901 } 902 903 if (! (ifp->if_flags & IFF_OACTIVE)) 904 (*ifp->if_start)(ifp); 905 906 /* 907 * Count output packets and bytes. 908 * The packet length includes header + additional hardware framing 909 * according to RFC 1333. 910 */ 911 ifp->if_obytes += len + sp->pp_framebytes; 912 splx(s); 913 return (0); 914 } 915 916 void 917 sppp_attach(struct ifnet *ifp) 918 { 919 struct sppp *sp = (struct sppp *) ifp; 920 921 /* Initialize keepalive handler. */ 922 if (! spppq) { 923 callout_init(&keepalive_ch); 924 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 925 } 926 927 /* Insert new entry into the keepalive list. */ 928 sp->pp_next = spppq; 929 spppq = sp; 930 931 sp->pp_if.if_type = IFT_PPP; 932 sp->pp_if.if_output = sppp_output; 933 sp->pp_fastq.ifq_maxlen = 32; 934 sp->pp_cpq.ifq_maxlen = 20; 935 sp->pp_loopcnt = 0; 936 sp->pp_alivecnt = 0; 937 sp->pp_last_activity = 0; 938 sp->pp_idle_timeout = 0; 939 memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq)); 940 memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq)); 941 sp->pp_auth_failures = 0; 942 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 943 sp->pp_phase = SPPP_PHASE_DEAD; 944 sp->pp_up = lcp.Up; 945 sp->pp_down = lcp.Down; 946 947 if_alloc_sadl(ifp); 948 949 memset(&sp->myauth, 0, sizeof sp->myauth); 950 memset(&sp->hisauth, 0, sizeof sp->hisauth); 951 sppp_lcp_init(sp); 952 sppp_ipcp_init(sp); 953 sppp_ipv6cp_init(sp); 954 sppp_pap_init(sp); 955 sppp_chap_init(sp); 956 } 957 958 void 959 sppp_detach(struct ifnet *ifp) 960 { 961 struct sppp **q, *p, *sp = (struct sppp *) ifp; 962 int i; 963 964 /* Remove the entry from the keepalive list. */ 965 for (q = &spppq; (p = *q); q = &p->pp_next) 966 if (p == sp) { 967 *q = p->pp_next; 968 break; 969 } 970 971 /* Stop keepalive handler. */ 972 if (! spppq) { 973 callout_stop(&keepalive_ch); 974 } 975 976 for (i = 0; i < IDX_COUNT; i++) { 977 callout_stop(&sp->ch[i]); 978 } 979 callout_stop(&sp->pap_my_to_ch); 980 981 /* free authentication info */ 982 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 983 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 984 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 985 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 986 987 if_free_sadl(ifp); 988 } 989 990 /* 991 * Flush the interface output queue. 992 */ 993 void 994 sppp_flush(struct ifnet *ifp) 995 { 996 struct sppp *sp = (struct sppp *) ifp; 997 998 IFQ_PURGE(&sp->pp_if.if_snd); 999 IF_PURGE(&sp->pp_fastq); 1000 IF_PURGE(&sp->pp_cpq); 1001 } 1002 1003 /* 1004 * Check if the output queue is empty. 1005 */ 1006 int 1007 sppp_isempty(struct ifnet *ifp) 1008 { 1009 struct sppp *sp = (struct sppp *) ifp; 1010 int empty, s; 1011 1012 s = splnet(); 1013 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1014 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1015 splx(s); 1016 return (empty); 1017 } 1018 1019 /* 1020 * Get next packet to send. 1021 */ 1022 struct mbuf * 1023 sppp_dequeue(struct ifnet *ifp) 1024 { 1025 struct sppp *sp = (struct sppp *) ifp; 1026 struct mbuf *m; 1027 int s; 1028 1029 s = splnet(); 1030 /* 1031 * Process only the control protocol queue until we have at 1032 * least one NCP open. 1033 * 1034 * Do always serve all three queues in Cisco mode. 1035 */ 1036 IF_DEQUEUE(&sp->pp_cpq, m); 1037 if (m == NULL && 1038 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1039 IF_DEQUEUE(&sp->pp_fastq, m); 1040 if (m == NULL) 1041 IF_DEQUEUE(&sp->pp_if.if_snd, m); 1042 } 1043 splx(s); 1044 return m; 1045 } 1046 1047 /* 1048 * Pick the next packet, do not remove it from the queue. 1049 */ 1050 struct mbuf * 1051 sppp_pick(struct ifnet *ifp) 1052 { 1053 struct sppp *sp = (struct sppp *)ifp; 1054 struct mbuf *m; 1055 int s; 1056 1057 s= splnet(); 1058 1059 m = sp->pp_cpq.ifq_head; 1060 if (m == NULL && 1061 (sp->pp_phase == SPPP_PHASE_NETWORK || 1062 (sp->pp_flags & PP_CISCO) != 0)) 1063 if ((m = sp->pp_fastq.ifq_head) == NULL) 1064 m = sp->pp_if.if_snd.ifq_head; 1065 splx(s); 1066 return (m); 1067 } 1068 1069 /* 1070 * Process an ioctl request. Called on low priority level. 1071 */ 1072 int 1073 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1074 { 1075 struct ifreq *ifr = (struct ifreq *) data; 1076 struct sppp *sp = (struct sppp *) ifp; 1077 int s, error=0, going_up, going_down, newmode; 1078 1079 s = splnet(); 1080 switch (cmd) { 1081 case SIOCAIFADDR: 1082 case SIOCSIFDSTADDR: 1083 break; 1084 1085 case SIOCSIFADDR: 1086 if_up(ifp); 1087 /* fall through... */ 1088 1089 case SIOCSIFFLAGS: 1090 going_up = ifp->if_flags & IFF_UP && 1091 (ifp->if_flags & IFF_RUNNING) == 0; 1092 going_down = (ifp->if_flags & IFF_UP) == 0 && 1093 ifp->if_flags & IFF_RUNNING; 1094 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1095 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1096 /* sanity */ 1097 newmode = IFF_PASSIVE; 1098 ifp->if_flags &= ~IFF_AUTO; 1099 } 1100 1101 if (going_up || going_down) 1102 lcp.Close(sp); 1103 if (going_up && newmode == 0) { 1104 /* neither auto-dial nor passive */ 1105 ifp->if_flags |= IFF_RUNNING; 1106 if (!(sp->pp_flags & PP_CISCO)) 1107 lcp.Open(sp); 1108 } else if (going_down) { 1109 sppp_flush(ifp); 1110 ifp->if_flags &= ~IFF_RUNNING; 1111 } 1112 1113 break; 1114 1115 #ifdef SIOCSIFMTU 1116 #ifndef ifr_mtu 1117 #define ifr_mtu ifr_metric 1118 #endif 1119 case SIOCSIFMTU: 1120 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru) 1121 return (EINVAL); 1122 ifp->if_mtu = ifr->ifr_mtu; 1123 break; 1124 #endif 1125 #ifdef SLIOCSETMTU 1126 case SLIOCSETMTU: 1127 if (*(short *)data < 128 || *(short *)data > sp->lcp.their_mru) 1128 return (EINVAL); 1129 ifp->if_mtu = *(short *)data; 1130 break; 1131 #endif 1132 #ifdef SIOCGIFMTU 1133 case SIOCGIFMTU: 1134 ifr->ifr_mtu = ifp->if_mtu; 1135 break; 1136 #endif 1137 #ifdef SLIOCGETMTU 1138 case SLIOCGETMTU: 1139 *(short *)data = ifp->if_mtu; 1140 break; 1141 #endif 1142 case SIOCADDMULTI: 1143 case SIOCDELMULTI: 1144 break; 1145 1146 case SPPPSETAUTHCFG: 1147 case SPPPSETLCPCFG: 1148 case SPPPSETIDLETO: 1149 case SPPPSETAUTHFAILURE: 1150 case SPPPSETDNSOPTS: 1151 { 1152 struct proc *p = curproc; /* XXX */ 1153 1154 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1155 break; 1156 } 1157 /* FALLTHROUGH */ 1158 case SPPPGETAUTHCFG: 1159 case SPPPGETLCPCFG: 1160 case SPPPGETSTATUS: 1161 case SPPPGETIDLETO: 1162 case SPPPGETAUTHFAILURES: 1163 case SPPPGETDNSOPTS: 1164 case SPPPGETDNSADDRS: 1165 error = sppp_params(sp, cmd, data); 1166 break; 1167 1168 default: 1169 error = ENOTTY; 1170 } 1171 splx(s); 1172 return (error); 1173 } 1174 1175 1176 /* 1177 * Cisco framing implementation. 1178 */ 1179 1180 /* 1181 * Handle incoming Cisco keepalive protocol packets. 1182 */ 1183 static void 1184 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1185 { 1186 STDDCL; 1187 struct cisco_packet *h; 1188 u_int32_t me, mymask; 1189 1190 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1191 if (debug) 1192 log(LOG_DEBUG, 1193 SPP_FMT "cisco invalid packet length: %d bytes\n", 1194 SPP_ARGS(ifp), m->m_pkthdr.len); 1195 return; 1196 } 1197 h = mtod(m, struct cisco_packet *); 1198 if (debug) 1199 log(LOG_DEBUG, 1200 SPP_FMT "cisco input: %d bytes " 1201 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1202 SPP_ARGS(ifp), m->m_pkthdr.len, 1203 ntohl (h->type), h->par1, h->par2, (u_int)h->rel, 1204 (u_int)h->time0, (u_int)h->time1); 1205 switch (ntohl (h->type)) { 1206 default: 1207 if (debug) 1208 addlog(SPP_FMT "cisco unknown packet type: 0x%x\n", 1209 SPP_ARGS(ifp), ntohl (h->type)); 1210 break; 1211 case CISCO_ADDR_REPLY: 1212 /* Reply on address request, ignore */ 1213 break; 1214 case CISCO_KEEPALIVE_REQ: 1215 sp->pp_alivecnt = 0; 1216 sp->pp_rseq[IDX_LCP] = ntohl (h->par1); 1217 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1218 /* Local and remote sequence numbers are equal. 1219 * Probably, the line is in loopback mode. */ 1220 if (sp->pp_loopcnt >= MAXALIVECNT) { 1221 printf (SPP_FMT "loopback\n", 1222 SPP_ARGS(ifp)); 1223 sp->pp_loopcnt = 0; 1224 if (ifp->if_flags & IFF_UP) { 1225 if_down(ifp); 1226 IF_PURGE(&sp->pp_cpq); 1227 } 1228 } 1229 ++sp->pp_loopcnt; 1230 1231 /* Generate new local sequence number */ 1232 sp->pp_seq[IDX_LCP] = random(); 1233 break; 1234 } 1235 sp->pp_loopcnt = 0; 1236 if (! (ifp->if_flags & IFF_UP) && 1237 (ifp->if_flags & IFF_RUNNING)) { 1238 if_up(ifp); 1239 } 1240 break; 1241 case CISCO_ADDR_REQ: 1242 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1243 if (me != 0L) 1244 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1245 break; 1246 } 1247 } 1248 1249 /* 1250 * Send Cisco keepalive packet. 1251 */ 1252 static void 1253 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1254 { 1255 STDDCL; 1256 struct ppp_header *h; 1257 struct cisco_packet *ch; 1258 struct mbuf *m; 1259 u_int32_t t = (time.tv_sec - boottime.tv_sec) * 1000; 1260 1261 MGETHDR(m, M_DONTWAIT, MT_DATA); 1262 if (! m) 1263 return; 1264 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1265 m->m_pkthdr.rcvif = 0; 1266 1267 h = mtod(m, struct ppp_header *); 1268 h->address = CISCO_MULTICAST; 1269 h->control = 0; 1270 h->protocol = htons(CISCO_KEEPALIVE); 1271 1272 ch = (struct cisco_packet *)(h + 1); 1273 ch->type = htonl(type); 1274 ch->par1 = htonl(par1); 1275 ch->par2 = htonl(par2); 1276 ch->rel = -1; 1277 1278 ch->time0 = htons((u_short)(t >> 16)); 1279 ch->time1 = htons((u_short) t); 1280 1281 if (debug) 1282 log(LOG_DEBUG, 1283 SPP_FMT "cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1284 SPP_ARGS(ifp), ntohl (ch->type), ch->par1, 1285 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1286 (u_int)ch->time1); 1287 1288 if (IF_QFULL(&sp->pp_cpq)) { 1289 IF_DROP(&sp->pp_fastq); 1290 IF_DROP(&ifp->if_snd); 1291 m_freem(m); 1292 ++ifp->if_oerrors; 1293 return; 1294 } else 1295 IF_ENQUEUE(&sp->pp_cpq, m); 1296 if (! (ifp->if_flags & IFF_OACTIVE)) 1297 (*ifp->if_start)(ifp); 1298 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1299 } 1300 1301 /* 1302 * PPP protocol implementation. 1303 */ 1304 1305 /* 1306 * Send PPP control protocol packet. 1307 */ 1308 static void 1309 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1310 u_char ident, u_short len, void *data) 1311 { 1312 STDDCL; 1313 struct lcp_header *lh; 1314 struct mbuf *m; 1315 size_t pkthdrlen; 1316 1317 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1318 1319 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1320 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1321 MGETHDR(m, M_DONTWAIT, MT_DATA); 1322 if (! m) 1323 return; 1324 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1325 m->m_pkthdr.rcvif = 0; 1326 1327 if (sp->pp_flags & PP_NOFRAMING) { 1328 *mtod(m, u_int16_t *) = htons(proto); 1329 lh = (struct lcp_header *)(mtod(m, u_int8_t *) + 2); 1330 } else { 1331 struct ppp_header *h; 1332 h = mtod(m, struct ppp_header *); 1333 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1334 h->control = PPP_UI; /* Unnumbered Info */ 1335 h->protocol = htons(proto); /* Link Control Protocol */ 1336 lh = (struct lcp_header *)(h + 1); 1337 } 1338 lh->type = type; 1339 lh->ident = ident; 1340 lh->len = htons(LCP_HEADER_LEN + len); 1341 if (len) 1342 bcopy (data, lh + 1, len); 1343 1344 if (debug) { 1345 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 1346 SPP_ARGS(ifp), 1347 sppp_proto_name(proto), 1348 sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len)); 1349 if (len) 1350 sppp_print_bytes((u_char *)(lh + 1), len); 1351 addlog(">\n"); 1352 } 1353 if (IF_QFULL(&sp->pp_cpq)) { 1354 IF_DROP(&sp->pp_fastq); 1355 IF_DROP(&ifp->if_snd); 1356 m_freem(m); 1357 ++ifp->if_oerrors; 1358 return; 1359 } else 1360 IF_ENQUEUE(&sp->pp_cpq, m); 1361 if (! (ifp->if_flags & IFF_OACTIVE)) 1362 (*ifp->if_start)(ifp); 1363 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1364 } 1365 1366 /* 1367 * Handle incoming PPP control protocol packets. 1368 */ 1369 static void 1370 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1371 { 1372 STDDCL; 1373 struct lcp_header *h; 1374 int len = m->m_pkthdr.len; 1375 int rv; 1376 u_char *p; 1377 u_int32_t u32; 1378 1379 if (len < 4) { 1380 if (debug) 1381 log(LOG_DEBUG, 1382 SPP_FMT "%s invalid packet length: %d bytes\n", 1383 SPP_ARGS(ifp), cp->name, len); 1384 return; 1385 } 1386 h = mtod(m, struct lcp_header *); 1387 if (debug) { 1388 log(LOG_DEBUG, 1389 SPP_FMT "%s input(%s): <%s id=0x%x len=%d", 1390 SPP_ARGS(ifp), cp->name, 1391 sppp_state_name(sp->state[cp->protoidx]), 1392 sppp_cp_type_name(h->type), h->ident, ntohs(h->len)); 1393 if (len > 4) 1394 sppp_print_bytes((u_char *)(h + 1), len - 4); 1395 addlog(">\n"); 1396 } 1397 if (len > ntohs(h->len)) 1398 len = ntohs(h->len); 1399 p = (u_char *)(h + 1); 1400 switch (h->type) { 1401 case CONF_REQ: 1402 if (len < 4) { 1403 if (debug) 1404 addlog(SPP_FMT "%s invalid conf-req length %d\n", 1405 SPP_ARGS(ifp), cp->name, 1406 len); 1407 ++ifp->if_ierrors; 1408 break; 1409 } 1410 /* handle states where RCR doesn't get a SCA/SCN */ 1411 switch (sp->state[cp->protoidx]) { 1412 case STATE_CLOSING: 1413 case STATE_STOPPING: 1414 return; 1415 case STATE_CLOSED: 1416 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1417 0, 0); 1418 return; 1419 } 1420 rv = (cp->RCR)(sp, h, len); 1421 switch (sp->state[cp->protoidx]) { 1422 case STATE_OPENED: 1423 (cp->tld)(sp); 1424 (cp->scr)(sp); 1425 /* fall through... */ 1426 case STATE_ACK_SENT: 1427 case STATE_REQ_SENT: 1428 sppp_cp_change_state(cp, sp, rv? 1429 STATE_ACK_SENT: STATE_REQ_SENT); 1430 break; 1431 case STATE_STOPPED: 1432 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1433 (cp->scr)(sp); 1434 sppp_cp_change_state(cp, sp, rv? 1435 STATE_ACK_SENT: STATE_REQ_SENT); 1436 break; 1437 case STATE_ACK_RCVD: 1438 if (rv) { 1439 sppp_cp_change_state(cp, sp, STATE_OPENED); 1440 if (debug) 1441 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1442 SPP_ARGS(ifp), 1443 cp->name); 1444 (cp->tlu)(sp); 1445 } else 1446 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1447 break; 1448 default: 1449 printf(SPP_FMT "%s illegal %s in state %s\n", 1450 SPP_ARGS(ifp), cp->name, 1451 sppp_cp_type_name(h->type), 1452 sppp_state_name(sp->state[cp->protoidx])); 1453 ++ifp->if_ierrors; 1454 } 1455 break; 1456 case CONF_ACK: 1457 if (h->ident != sp->confid[cp->protoidx]) { 1458 if (debug) 1459 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1460 SPP_ARGS(ifp), cp->name, 1461 h->ident, sp->confid[cp->protoidx]); 1462 ++ifp->if_ierrors; 1463 break; 1464 } 1465 switch (sp->state[cp->protoidx]) { 1466 case STATE_CLOSED: 1467 case STATE_STOPPED: 1468 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1469 break; 1470 case STATE_CLOSING: 1471 case STATE_STOPPING: 1472 break; 1473 case STATE_REQ_SENT: 1474 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1475 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1476 break; 1477 case STATE_OPENED: 1478 (cp->tld)(sp); 1479 /* fall through */ 1480 case STATE_ACK_RCVD: 1481 (cp->scr)(sp); 1482 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1483 break; 1484 case STATE_ACK_SENT: 1485 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1486 sppp_cp_change_state(cp, sp, STATE_OPENED); 1487 if (debug) 1488 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1489 SPP_ARGS(ifp), cp->name); 1490 (cp->tlu)(sp); 1491 break; 1492 default: 1493 printf(SPP_FMT "%s illegal %s in state %s\n", 1494 SPP_ARGS(ifp), cp->name, 1495 sppp_cp_type_name(h->type), 1496 sppp_state_name(sp->state[cp->protoidx])); 1497 ++ifp->if_ierrors; 1498 } 1499 break; 1500 case CONF_NAK: 1501 case CONF_REJ: 1502 if (h->ident != sp->confid[cp->protoidx]) { 1503 if (debug) 1504 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1505 SPP_ARGS(ifp), cp->name, 1506 h->ident, sp->confid[cp->protoidx]); 1507 ++ifp->if_ierrors; 1508 break; 1509 } 1510 if (h->type == CONF_NAK) 1511 (cp->RCN_nak)(sp, h, len); 1512 else /* CONF_REJ */ 1513 (cp->RCN_rej)(sp, h, len); 1514 1515 switch (sp->state[cp->protoidx]) { 1516 case STATE_CLOSED: 1517 case STATE_STOPPED: 1518 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1519 break; 1520 case STATE_REQ_SENT: 1521 case STATE_ACK_SENT: 1522 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1523 (cp->scr)(sp); 1524 break; 1525 case STATE_OPENED: 1526 (cp->tld)(sp); 1527 /* fall through */ 1528 case STATE_ACK_RCVD: 1529 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1530 (cp->scr)(sp); 1531 break; 1532 case STATE_CLOSING: 1533 case STATE_STOPPING: 1534 break; 1535 default: 1536 printf(SPP_FMT "%s illegal %s in state %s\n", 1537 SPP_ARGS(ifp), cp->name, 1538 sppp_cp_type_name(h->type), 1539 sppp_state_name(sp->state[cp->protoidx])); 1540 ++ifp->if_ierrors; 1541 } 1542 break; 1543 1544 case TERM_REQ: 1545 switch (sp->state[cp->protoidx]) { 1546 case STATE_ACK_RCVD: 1547 case STATE_ACK_SENT: 1548 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1549 /* fall through */ 1550 case STATE_CLOSED: 1551 case STATE_STOPPED: 1552 case STATE_CLOSING: 1553 case STATE_STOPPING: 1554 case STATE_REQ_SENT: 1555 sta: 1556 /* Send Terminate-Ack packet. */ 1557 if (debug) 1558 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n", 1559 SPP_ARGS(ifp), cp->name); 1560 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1561 break; 1562 case STATE_OPENED: 1563 (cp->tld)(sp); 1564 sp->rst_counter[cp->protoidx] = 0; 1565 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1566 goto sta; 1567 break; 1568 default: 1569 printf(SPP_FMT "%s illegal %s in state %s\n", 1570 SPP_ARGS(ifp), cp->name, 1571 sppp_cp_type_name(h->type), 1572 sppp_state_name(sp->state[cp->protoidx])); 1573 ++ifp->if_ierrors; 1574 } 1575 break; 1576 case TERM_ACK: 1577 switch (sp->state[cp->protoidx]) { 1578 case STATE_CLOSED: 1579 case STATE_STOPPED: 1580 case STATE_REQ_SENT: 1581 case STATE_ACK_SENT: 1582 break; 1583 case STATE_CLOSING: 1584 (cp->tlf)(sp); 1585 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1586 sppp_lcp_check_and_close(sp); 1587 break; 1588 case STATE_STOPPING: 1589 (cp->tlf)(sp); 1590 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1591 sppp_lcp_check_and_close(sp); 1592 break; 1593 case STATE_ACK_RCVD: 1594 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1595 break; 1596 case STATE_OPENED: 1597 (cp->tld)(sp); 1598 (cp->scr)(sp); 1599 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1600 break; 1601 default: 1602 printf(SPP_FMT "%s illegal %s in state %s\n", 1603 SPP_ARGS(ifp), cp->name, 1604 sppp_cp_type_name(h->type), 1605 sppp_state_name(sp->state[cp->protoidx])); 1606 ++ifp->if_ierrors; 1607 } 1608 break; 1609 case CODE_REJ: 1610 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1611 log(LOG_INFO, 1612 SPP_FMT "%s: ignoring RXJ (%s) for code ?, " 1613 "danger will robinson\n", 1614 SPP_ARGS(ifp), cp->name, 1615 sppp_cp_type_name(h->type)); 1616 switch (sp->state[cp->protoidx]) { 1617 case STATE_CLOSED: 1618 case STATE_STOPPED: 1619 case STATE_REQ_SENT: 1620 case STATE_ACK_SENT: 1621 case STATE_CLOSING: 1622 case STATE_STOPPING: 1623 case STATE_OPENED: 1624 break; 1625 case STATE_ACK_RCVD: 1626 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1627 break; 1628 default: 1629 printf(SPP_FMT "%s illegal %s in state %s\n", 1630 SPP_ARGS(ifp), cp->name, 1631 sppp_cp_type_name(h->type), 1632 sppp_state_name(sp->state[cp->protoidx])); 1633 ++ifp->if_ierrors; 1634 } 1635 break; 1636 case PROTO_REJ: 1637 { 1638 int catastrophic; 1639 const struct cp *upper; 1640 int i; 1641 u_int16_t proto; 1642 1643 catastrophic = 0; 1644 upper = NULL; 1645 proto = p[0] << 8 | p[1]; 1646 for (i = 0; i < IDX_COUNT; i++) { 1647 if (cps[i]->proto == proto) { 1648 upper = cps[i]; 1649 break; 1650 } 1651 } 1652 if (upper == NULL) 1653 catastrophic++; 1654 1655 if (debug) 1656 log(LOG_INFO, 1657 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1658 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+', 1659 sppp_cp_type_name(h->type), proto, 1660 upper ? upper->name : "unknown", 1661 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1662 1663 /* 1664 * if we got RXJ+ against conf-req, the peer does not implement 1665 * this particular protocol type. terminate the protocol. 1666 */ 1667 if (upper && !catastrophic) { 1668 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1669 upper->Close(sp); 1670 break; 1671 } 1672 } 1673 1674 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1675 switch (sp->state[cp->protoidx]) { 1676 case STATE_CLOSED: 1677 case STATE_STOPPED: 1678 case STATE_REQ_SENT: 1679 case STATE_ACK_SENT: 1680 case STATE_CLOSING: 1681 case STATE_STOPPING: 1682 case STATE_OPENED: 1683 break; 1684 case STATE_ACK_RCVD: 1685 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1686 break; 1687 default: 1688 printf(SPP_FMT "%s illegal %s in state %s\n", 1689 SPP_ARGS(ifp), cp->name, 1690 sppp_cp_type_name(h->type), 1691 sppp_state_name(sp->state[cp->protoidx])); 1692 ++ifp->if_ierrors; 1693 } 1694 break; 1695 } 1696 case DISC_REQ: 1697 if (cp->proto != PPP_LCP) 1698 goto illegal; 1699 /* Discard the packet. */ 1700 break; 1701 case ECHO_REQ: 1702 if (cp->proto != PPP_LCP) 1703 goto illegal; 1704 if (sp->state[cp->protoidx] != STATE_OPENED) { 1705 if (debug) 1706 addlog(SPP_FMT "lcp echo req but lcp closed\n", 1707 SPP_ARGS(ifp)); 1708 ++ifp->if_ierrors; 1709 break; 1710 } 1711 if (len < 8) { 1712 if (debug) 1713 addlog(SPP_FMT "invalid lcp echo request " 1714 "packet length: %d bytes\n", 1715 SPP_ARGS(ifp), len); 1716 break; 1717 } 1718 memcpy(&u32, h + 1, sizeof u32); 1719 if (ntohl(u32) == sp->lcp.magic) { 1720 /* Line loopback mode detected. */ 1721 printf(SPP_FMT "loopback\n", SPP_ARGS(ifp)); 1722 if_down(ifp); 1723 IF_PURGE(&sp->pp_cpq); 1724 1725 /* Shut down the PPP link. */ 1726 /* XXX */ 1727 lcp.Down(sp); 1728 lcp.Up(sp); 1729 break; 1730 } 1731 u32 = htonl(sp->lcp.magic); 1732 memcpy(h + 1, &u32, sizeof u32); 1733 if (debug) 1734 addlog(SPP_FMT "got lcp echo req, sending echo rep\n", 1735 SPP_ARGS(ifp)); 1736 sppp_cp_send(sp, PPP_LCP, ECHO_REPLY, h->ident, len - 4, 1737 h + 1); 1738 break; 1739 case ECHO_REPLY: 1740 if (cp->proto != PPP_LCP) 1741 goto illegal; 1742 if (h->ident != sp->lcp.echoid) { 1743 ++ifp->if_ierrors; 1744 break; 1745 } 1746 if (len < 8) { 1747 if (debug) 1748 addlog(SPP_FMT "lcp invalid echo reply " 1749 "packet length: %d bytes\n", 1750 SPP_ARGS(ifp), len); 1751 break; 1752 } 1753 if (debug) 1754 addlog(SPP_FMT "lcp got echo rep\n", 1755 SPP_ARGS(ifp)); 1756 memcpy(&u32, h + 1, sizeof u32); 1757 if (ntohl(u32) != sp->lcp.magic) 1758 sp->pp_alivecnt = 0; 1759 break; 1760 default: 1761 /* Unknown packet type -- send Code-Reject packet. */ 1762 illegal: 1763 if (debug) 1764 addlog(SPP_FMT "%s send code-rej for 0x%x\n", 1765 SPP_ARGS(ifp), cp->name, h->type); 1766 sppp_cp_send(sp, cp->proto, CODE_REJ, 1767 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1768 ++ifp->if_ierrors; 1769 } 1770 } 1771 1772 1773 /* 1774 * The generic part of all Up/Down/Open/Close/TO event handlers. 1775 * Basically, the state transition handling in the automaton. 1776 */ 1777 static void 1778 sppp_up_event(const struct cp *cp, struct sppp *sp) 1779 { 1780 STDDCL; 1781 1782 if (debug) 1783 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n", 1784 SPP_ARGS(ifp), cp->name, 1785 sppp_state_name(sp->state[cp->protoidx])); 1786 1787 switch (sp->state[cp->protoidx]) { 1788 case STATE_INITIAL: 1789 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1790 break; 1791 case STATE_STARTING: 1792 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1793 (cp->scr)(sp); 1794 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1795 break; 1796 default: 1797 printf(SPP_FMT "%s illegal up in state %s\n", 1798 SPP_ARGS(ifp), cp->name, 1799 sppp_state_name(sp->state[cp->protoidx])); 1800 } 1801 } 1802 1803 static void 1804 sppp_down_event(const struct cp *cp, struct sppp *sp) 1805 { 1806 STDDCL; 1807 1808 if (debug) 1809 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n", 1810 SPP_ARGS(ifp), cp->name, 1811 sppp_state_name(sp->state[cp->protoidx])); 1812 1813 switch (sp->state[cp->protoidx]) { 1814 case STATE_CLOSED: 1815 case STATE_CLOSING: 1816 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1817 break; 1818 case STATE_STOPPED: 1819 (cp->tls)(sp); 1820 /* fall through */ 1821 case STATE_STOPPING: 1822 case STATE_REQ_SENT: 1823 case STATE_ACK_RCVD: 1824 case STATE_ACK_SENT: 1825 sppp_cp_change_state(cp, sp, STATE_STARTING); 1826 break; 1827 case STATE_OPENED: 1828 (cp->tld)(sp); 1829 sppp_cp_change_state(cp, sp, STATE_STARTING); 1830 break; 1831 default: 1832 printf(SPP_FMT "%s illegal down in state %s\n", 1833 SPP_ARGS(ifp), cp->name, 1834 sppp_state_name(sp->state[cp->protoidx])); 1835 } 1836 } 1837 1838 1839 static void 1840 sppp_open_event(const struct cp *cp, struct sppp *sp) 1841 { 1842 STDDCL; 1843 1844 if (debug) 1845 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n", 1846 SPP_ARGS(ifp), cp->name, 1847 sppp_state_name(sp->state[cp->protoidx])); 1848 1849 switch (sp->state[cp->protoidx]) { 1850 case STATE_INITIAL: 1851 (cp->tls)(sp); 1852 sppp_cp_change_state(cp, sp, STATE_STARTING); 1853 break; 1854 case STATE_STARTING: 1855 break; 1856 case STATE_CLOSED: 1857 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1858 (cp->scr)(sp); 1859 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1860 break; 1861 case STATE_STOPPED: 1862 case STATE_STOPPING: 1863 case STATE_REQ_SENT: 1864 case STATE_ACK_RCVD: 1865 case STATE_ACK_SENT: 1866 case STATE_OPENED: 1867 break; 1868 case STATE_CLOSING: 1869 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1870 break; 1871 } 1872 } 1873 1874 1875 static void 1876 sppp_close_event(const struct cp *cp, struct sppp *sp) 1877 { 1878 STDDCL; 1879 1880 if (debug) 1881 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n", 1882 SPP_ARGS(ifp), cp->name, 1883 sppp_state_name(sp->state[cp->protoidx])); 1884 1885 switch (sp->state[cp->protoidx]) { 1886 case STATE_INITIAL: 1887 case STATE_CLOSED: 1888 case STATE_CLOSING: 1889 break; 1890 case STATE_STARTING: 1891 (cp->tlf)(sp); 1892 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1893 break; 1894 case STATE_STOPPED: 1895 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1896 break; 1897 case STATE_STOPPING: 1898 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1899 break; 1900 case STATE_OPENED: 1901 (cp->tld)(sp); 1902 /* fall through */ 1903 case STATE_REQ_SENT: 1904 case STATE_ACK_RCVD: 1905 case STATE_ACK_SENT: 1906 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 1907 sppp_cp_send(sp, cp->proto, TERM_REQ, 1908 ++sp->pp_seq[cp->protoidx], 0, 0); 1909 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1910 break; 1911 } 1912 } 1913 1914 static void 1915 sppp_to_event(const struct cp *cp, struct sppp *sp) 1916 { 1917 STDDCL; 1918 int s; 1919 1920 s = splnet(); 1921 if (debug) 1922 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n", 1923 SPP_ARGS(ifp), cp->name, 1924 sppp_state_name(sp->state[cp->protoidx]), 1925 sp->rst_counter[cp->protoidx]); 1926 1927 if (--sp->rst_counter[cp->protoidx] < 0) 1928 /* TO- event */ 1929 switch (sp->state[cp->protoidx]) { 1930 case STATE_CLOSING: 1931 (cp->tlf)(sp); 1932 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1933 sppp_lcp_check_and_close(sp); 1934 break; 1935 case STATE_STOPPING: 1936 (cp->tlf)(sp); 1937 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1938 sppp_lcp_check_and_close(sp); 1939 break; 1940 case STATE_REQ_SENT: 1941 case STATE_ACK_RCVD: 1942 case STATE_ACK_SENT: 1943 (cp->tlf)(sp); 1944 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1945 sppp_lcp_check_and_close(sp); 1946 break; 1947 } 1948 else 1949 /* TO+ event */ 1950 switch (sp->state[cp->protoidx]) { 1951 case STATE_CLOSING: 1952 case STATE_STOPPING: 1953 sppp_cp_send(sp, cp->proto, TERM_REQ, 1954 ++sp->pp_seq[cp->protoidx], 0, 0); 1955 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1956 cp->TO, sp); 1957 break; 1958 case STATE_REQ_SENT: 1959 case STATE_ACK_RCVD: 1960 (cp->scr)(sp); 1961 /* sppp_cp_change_state() will restart the timer */ 1962 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1963 break; 1964 case STATE_ACK_SENT: 1965 (cp->scr)(sp); 1966 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1967 cp->TO, sp); 1968 break; 1969 } 1970 1971 splx(s); 1972 } 1973 1974 /* 1975 * Change the state of a control protocol in the state automaton. 1976 * Takes care of starting/stopping the restart timer. 1977 */ 1978 void 1979 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 1980 { 1981 sp->state[cp->protoidx] = newstate; 1982 callout_stop(&sp->ch[cp->protoidx]); 1983 switch (newstate) { 1984 case STATE_INITIAL: 1985 case STATE_STARTING: 1986 case STATE_CLOSED: 1987 case STATE_STOPPED: 1988 case STATE_OPENED: 1989 break; 1990 case STATE_CLOSING: 1991 case STATE_STOPPING: 1992 case STATE_REQ_SENT: 1993 case STATE_ACK_RCVD: 1994 case STATE_ACK_SENT: 1995 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1996 cp->TO, sp); 1997 break; 1998 } 1999 } 2000 2001 /* 2002 *--------------------------------------------------------------------------* 2003 * * 2004 * The LCP implementation. * 2005 * * 2006 *--------------------------------------------------------------------------* 2007 */ 2008 static void 2009 sppp_lcp_init(struct sppp *sp) 2010 { 2011 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 2012 sp->lcp.magic = 0; 2013 sp->state[IDX_LCP] = STATE_INITIAL; 2014 sp->fail_counter[IDX_LCP] = 0; 2015 sp->pp_seq[IDX_LCP] = 0; 2016 sp->pp_rseq[IDX_LCP] = 0; 2017 sp->lcp.protos = 0; 2018 sp->lcp.mru = sp->lcp.their_mru = PP_MTU; 2019 2020 /* 2021 * Initialize counters and timeout values. Note that we don't 2022 * use the 3 seconds suggested in RFC 1661 since we are likely 2023 * running on a fast link. XXX We should probably implement 2024 * the exponential backoff option. Note that these values are 2025 * relevant for all control protocols, not just LCP only. 2026 */ 2027 sp->lcp.timeout = 1 * hz; 2028 sp->lcp.max_terminate = 2; 2029 sp->lcp.max_configure = 10; 2030 sp->lcp.max_failure = 10; 2031 callout_init(&sp->ch[IDX_LCP]); 2032 } 2033 2034 static void 2035 sppp_lcp_up(struct sppp *sp) 2036 { 2037 STDDCL; 2038 2039 /* Initialize activity timestamp: opening a connection is an activity */ 2040 sp->pp_last_activity = mono_time.tv_sec; 2041 2042 /* 2043 * If this interface is passive or dial-on-demand, and we are 2044 * still in Initial state, it means we've got an incoming 2045 * call. Activate the interface. 2046 */ 2047 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2048 if (debug) 2049 log(LOG_DEBUG, 2050 SPP_FMT "Up event", SPP_ARGS(ifp)); 2051 ifp->if_flags |= IFF_RUNNING; 2052 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2053 if (debug) 2054 addlog("(incoming call)\n"); 2055 sp->pp_flags |= PP_CALLIN; 2056 lcp.Open(sp); 2057 } else if (debug) 2058 addlog("\n"); 2059 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && 2060 (sp->state[IDX_LCP] == STATE_INITIAL)) { 2061 ifp->if_flags |= IFF_RUNNING; 2062 lcp.Open(sp); 2063 } 2064 2065 sppp_up_event(&lcp, sp); 2066 } 2067 2068 static void 2069 sppp_lcp_down(struct sppp *sp) 2070 { 2071 STDDCL; 2072 2073 sppp_down_event(&lcp, sp); 2074 2075 /* 2076 * If this is neither a dial-on-demand nor a passive 2077 * interface, simulate an ``ifconfig down'' action, so the 2078 * administrator can force a redial by another ``ifconfig 2079 * up''. XXX For leased line operation, should we immediately 2080 * try to reopen the connection here? 2081 */ 2082 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2083 if (debug) 2084 log(LOG_INFO, 2085 SPP_FMT "Down event (carrier loss), taking interface down.\n", 2086 SPP_ARGS(ifp)); 2087 if_down(ifp); 2088 } else { 2089 if (debug) 2090 log(LOG_DEBUG, 2091 SPP_FMT "Down event (carrier loss)\n", 2092 SPP_ARGS(ifp)); 2093 } 2094 sp->pp_flags &= ~PP_CALLIN; 2095 if (sp->state[IDX_LCP] != STATE_INITIAL) 2096 lcp.Close(sp); 2097 ifp->if_flags &= ~IFF_RUNNING; 2098 } 2099 2100 static void 2101 sppp_lcp_open(struct sppp *sp) 2102 { 2103 /* 2104 * If we are authenticator, negotiate LCP_AUTH 2105 */ 2106 if (sp->hisauth.proto != 0) 2107 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2108 else 2109 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2110 sp->pp_flags &= ~PP_NEEDAUTH; 2111 sppp_open_event(&lcp, sp); 2112 } 2113 2114 static void 2115 sppp_lcp_close(struct sppp *sp) 2116 { 2117 sppp_close_event(&lcp, sp); 2118 } 2119 2120 static void 2121 sppp_lcp_TO(void *cookie) 2122 { 2123 sppp_to_event(&lcp, (struct sppp *)cookie); 2124 } 2125 2126 /* 2127 * Analyze a configure request. Return true if it was agreeable, and 2128 * caused action sca, false if it has been rejected or nak'ed, and 2129 * caused action scn. (The return value is used to make the state 2130 * transition decision in the state automaton.) 2131 */ 2132 static int 2133 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2134 { 2135 STDDCL; 2136 u_char *buf, *r, *p; 2137 int origlen, rlen; 2138 u_int32_t nmagic; 2139 u_short authproto; 2140 2141 len -= 4; 2142 origlen = len; 2143 buf = r = malloc (len, M_TEMP, M_NOWAIT); 2144 if (! buf) 2145 return (0); 2146 2147 if (debug) 2148 log(LOG_DEBUG, SPP_FMT "lcp parse opts:", 2149 SPP_ARGS(ifp)); 2150 2151 /* pass 1: check for things that need to be rejected */ 2152 p = (void *)(h + 1); 2153 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2154 if (debug) 2155 addlog(" %s", sppp_lcp_opt_name(*p)); 2156 switch (*p) { 2157 case LCP_OPT_MAGIC: 2158 /* Magic number. */ 2159 /* fall through, both are same length */ 2160 case LCP_OPT_ASYNC_MAP: 2161 /* Async control character map. */ 2162 if (len >= 6 || p[1] == 6) 2163 continue; 2164 if (debug) 2165 addlog(" [invalid]"); 2166 break; 2167 case LCP_OPT_MRU: 2168 /* Maximum receive unit. */ 2169 if (len >= 4 && p[1] == 4) 2170 continue; 2171 if (debug) 2172 addlog(" [invalid]"); 2173 break; 2174 case LCP_OPT_AUTH_PROTO: 2175 if (len < 4) { 2176 if (debug) 2177 addlog(" [invalid]"); 2178 break; 2179 } 2180 authproto = (p[2] << 8) + p[3]; 2181 if (authproto == PPP_CHAP && p[1] != 5) { 2182 if (debug) 2183 addlog(" [invalid chap len]"); 2184 break; 2185 } 2186 if (sp->myauth.proto == 0) { 2187 /* we are not configured to do auth */ 2188 if (debug) 2189 addlog(" [not configured]"); 2190 break; 2191 } 2192 /* 2193 * Remote want us to authenticate, remember this, 2194 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2195 * up. 2196 */ 2197 sp->pp_flags |= PP_NEEDAUTH; 2198 continue; 2199 default: 2200 /* Others not supported. */ 2201 if (debug) 2202 addlog(" [rej]"); 2203 break; 2204 } 2205 /* Add the option to rejected list. */ 2206 bcopy (p, r, p[1]); 2207 r += p[1]; 2208 rlen += p[1]; 2209 } 2210 if (rlen) { 2211 if (debug) 2212 addlog(" send conf-rej\n"); 2213 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2214 goto end; 2215 } else if (debug) 2216 addlog("\n"); 2217 2218 /* 2219 * pass 2: check for option values that are unacceptable and 2220 * thus require to be nak'ed. 2221 */ 2222 if (debug) 2223 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ", 2224 SPP_ARGS(ifp)); 2225 2226 p = (void *)(h + 1); 2227 len = origlen; 2228 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2229 if (debug) 2230 addlog(" %s", sppp_lcp_opt_name(*p)); 2231 switch (*p) { 2232 case LCP_OPT_MAGIC: 2233 /* Magic number -- extract. */ 2234 nmagic = (u_int32_t)p[2] << 24 | 2235 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2236 if (nmagic != sp->lcp.magic) { 2237 if (debug) 2238 addlog(" 0x%x", nmagic); 2239 continue; 2240 } 2241 /* 2242 * Local and remote magics equal -- loopback? 2243 */ 2244 if (sp->pp_loopcnt >= MAXALIVECNT*5) { 2245 printf (SPP_FMT "loopback\n", 2246 SPP_ARGS(ifp)); 2247 sp->pp_loopcnt = 0; 2248 if (ifp->if_flags & IFF_UP) { 2249 if_down(ifp); 2250 IF_PURGE(&sp->pp_cpq); 2251 /* XXX ? */ 2252 lcp.Down(sp); 2253 lcp.Up(sp); 2254 } 2255 } else if (debug) 2256 addlog(" [glitch]"); 2257 ++sp->pp_loopcnt; 2258 /* 2259 * We negate our magic here, and NAK it. If 2260 * we see it later in an NAK packet, we 2261 * suggest a new one. 2262 */ 2263 nmagic = ~sp->lcp.magic; 2264 /* Gonna NAK it. */ 2265 p[2] = nmagic >> 24; 2266 p[3] = nmagic >> 16; 2267 p[4] = nmagic >> 8; 2268 p[5] = nmagic; 2269 break; 2270 2271 case LCP_OPT_ASYNC_MAP: 2272 /* 2273 * Async control character map -- just ignore it. 2274 * 2275 * Quote from RFC 1662, chapter 6: 2276 * To enable this functionality, synchronous PPP 2277 * implementations MUST always respond to the 2278 * Async-Control-Character-Map Configuration 2279 * Option with the LCP Configure-Ack. However, 2280 * acceptance of the Configuration Option does 2281 * not imply that the synchronous implementation 2282 * will do any ACCM mapping. Instead, all such 2283 * octet mapping will be performed by the 2284 * asynchronous-to-synchronous converter. 2285 */ 2286 continue; 2287 2288 case LCP_OPT_MRU: 2289 /* 2290 * Maximum receive unit. Always agreeable, 2291 * but ignored by now. 2292 */ 2293 sp->lcp.their_mru = p[2] * 256 + p[3]; 2294 if (debug) 2295 addlog(" %ld", sp->lcp.their_mru); 2296 continue; 2297 2298 case LCP_OPT_AUTH_PROTO: 2299 authproto = (p[2] << 8) + p[3]; 2300 if (sp->myauth.proto != authproto) { 2301 /* not agreed, nak */ 2302 if (debug) 2303 addlog(" [mine %s != his %s]", 2304 sppp_proto_name(sp->hisauth.proto), 2305 sppp_proto_name(authproto)); 2306 p[2] = sp->myauth.proto >> 8; 2307 p[3] = sp->myauth.proto; 2308 break; 2309 } 2310 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2311 if (debug) 2312 addlog(" [chap not MD5]"); 2313 p[4] = CHAP_MD5; 2314 break; 2315 } 2316 continue; 2317 } 2318 /* Add the option to nak'ed list. */ 2319 bcopy (p, r, p[1]); 2320 r += p[1]; 2321 rlen += p[1]; 2322 } 2323 if (rlen) { 2324 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2325 if (debug) 2326 addlog(" max_failure (%d) exceeded, " 2327 "send conf-rej\n", 2328 sp->lcp.max_failure); 2329 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2330 } else { 2331 if (debug) 2332 addlog(" send conf-nak\n"); 2333 sppp_cp_send(sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2334 } 2335 goto end; 2336 } else { 2337 if (debug) 2338 addlog(" send conf-ack\n"); 2339 sp->fail_counter[IDX_LCP] = 0; 2340 sp->pp_loopcnt = 0; 2341 sppp_cp_send(sp, PPP_LCP, CONF_ACK, h->ident, origlen, h + 1); 2342 } 2343 2344 end: 2345 free(buf, M_TEMP); 2346 return (rlen == 0); 2347 } 2348 2349 /* 2350 * Analyze the LCP Configure-Reject option list, and adjust our 2351 * negotiation. 2352 */ 2353 static void 2354 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2355 { 2356 STDDCL; 2357 u_char *buf, *p; 2358 2359 len -= 4; 2360 buf = malloc (len, M_TEMP, M_NOWAIT); 2361 if (!buf) 2362 return; 2363 2364 if (debug) 2365 log(LOG_DEBUG, SPP_FMT "lcp rej opts:", 2366 SPP_ARGS(ifp)); 2367 2368 p = (void *)(h + 1); 2369 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2370 if (debug) 2371 addlog(" %s", sppp_lcp_opt_name(*p)); 2372 switch (*p) { 2373 case LCP_OPT_MAGIC: 2374 /* Magic number -- can't use it, use 0 */ 2375 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2376 sp->lcp.magic = 0; 2377 break; 2378 case LCP_OPT_MRU: 2379 /* 2380 * Should not be rejected anyway, since we only 2381 * negotiate a MRU if explicitly requested by 2382 * peer. 2383 */ 2384 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2385 break; 2386 case LCP_OPT_AUTH_PROTO: 2387 /* 2388 * Peer doesn't want to authenticate himself, 2389 * deny unless this is a dialout call, and 2390 * SPPP_AUTHFLAG_NOCALLOUT is set. 2391 */ 2392 if ((sp->pp_flags & PP_CALLIN) == 0 && 2393 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2394 if (debug) 2395 addlog(" [don't insist on auth " 2396 "for callout]"); 2397 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2398 break; 2399 } 2400 if (debug) 2401 addlog("[access denied]\n"); 2402 lcp.Close(sp); 2403 break; 2404 } 2405 } 2406 if (debug) 2407 addlog("\n"); 2408 free(buf, M_TEMP); 2409 return; 2410 } 2411 2412 /* 2413 * Analyze the LCP Configure-NAK option list, and adjust our 2414 * negotiation. 2415 */ 2416 static void 2417 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2418 { 2419 STDDCL; 2420 u_char *buf, *p; 2421 u_int32_t magic; 2422 2423 len -= 4; 2424 buf = malloc (len, M_TEMP, M_NOWAIT); 2425 if (!buf) 2426 return; 2427 2428 if (debug) 2429 log(LOG_DEBUG, SPP_FMT "lcp nak opts:", 2430 SPP_ARGS(ifp)); 2431 2432 p = (void *)(h + 1); 2433 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2434 if (debug) 2435 addlog(" %s", sppp_lcp_opt_name(*p)); 2436 switch (*p) { 2437 case LCP_OPT_MAGIC: 2438 /* Magic number -- renegotiate */ 2439 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2440 len >= 6 && p[1] == 6) { 2441 magic = (u_int32_t)p[2] << 24 | 2442 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2443 /* 2444 * If the remote magic is our negated one, 2445 * this looks like a loopback problem. 2446 * Suggest a new magic to make sure. 2447 */ 2448 if (magic == ~sp->lcp.magic) { 2449 if (debug) 2450 addlog(" magic glitch"); 2451 sp->lcp.magic = random(); 2452 } else { 2453 sp->lcp.magic = magic; 2454 if (debug) 2455 addlog(" %d", magic); 2456 } 2457 } 2458 break; 2459 case LCP_OPT_MRU: 2460 /* 2461 * Peer wants to advise us to negotiate an MRU. 2462 * Agree on it if it's reasonable, or use 2463 * default otherwise. 2464 */ 2465 if (len >= 4 && p[1] == 4) { 2466 u_int mru = p[2] * 256 + p[3]; 2467 if (debug) 2468 addlog(" %d", mru); 2469 if (mru < PP_MTU || mru > PP_MAX_MRU) 2470 mru = PP_MTU; 2471 sp->lcp.mru = mru; 2472 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2473 } 2474 break; 2475 case LCP_OPT_AUTH_PROTO: 2476 /* 2477 * Peer doesn't like our authentication method, 2478 * deny. 2479 */ 2480 if (debug) 2481 addlog("[access denied]\n"); 2482 lcp.Close(sp); 2483 break; 2484 } 2485 } 2486 if (debug) 2487 addlog("\n"); 2488 free(buf, M_TEMP); 2489 return; 2490 } 2491 2492 static void 2493 sppp_lcp_tlu(struct sppp *sp) 2494 { 2495 STDDCL; 2496 int i; 2497 u_int32_t mask; 2498 2499 /* XXX ? */ 2500 if (! (ifp->if_flags & IFF_UP) && 2501 (ifp->if_flags & IFF_RUNNING)) { 2502 /* Coming out of loopback mode. */ 2503 if_up(ifp); 2504 } 2505 2506 for (i = 0; i < IDX_COUNT; i++) 2507 if ((cps[i])->flags & CP_QUAL) 2508 (cps[i])->Open(sp); 2509 2510 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2511 (sp->pp_flags & PP_NEEDAUTH) != 0) 2512 sp->pp_phase = SPPP_PHASE_AUTHENTICATE; 2513 else 2514 sp->pp_phase = SPPP_PHASE_NETWORK; 2515 2516 if(debug) 2517 { 2518 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2519 sppp_phase_name(sp->pp_phase)); 2520 } 2521 2522 /* 2523 * Open all authentication protocols. This is even required 2524 * if we already proceeded to network phase, since it might be 2525 * that remote wants us to authenticate, so we might have to 2526 * send a PAP request. Undesired authentication protocols 2527 * don't do anything when they get an Open event. 2528 */ 2529 for (i = 0; i < IDX_COUNT; i++) 2530 if ((cps[i])->flags & CP_AUTH) 2531 (cps[i])->Open(sp); 2532 2533 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2534 /* Notify all NCPs. */ 2535 for (i = 0; i < IDX_COUNT; i++) 2536 if ((cps[i])->flags & CP_NCP) 2537 (cps[i])->Open(sp); 2538 } 2539 2540 /* Send Up events to all started protos. */ 2541 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2542 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) 2543 (cps[i])->Up(sp); 2544 2545 /* notify low-level driver of state change */ 2546 if (sp->pp_chg) 2547 sp->pp_chg(sp, (int)sp->pp_phase); 2548 2549 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2550 /* if no NCP is starting, close down */ 2551 sppp_lcp_check_and_close(sp); 2552 } 2553 2554 static void 2555 sppp_lcp_tld(struct sppp *sp) 2556 { 2557 STDDCL; 2558 int i; 2559 u_int32_t mask; 2560 2561 sp->pp_phase = SPPP_PHASE_TERMINATE; 2562 2563 if(debug) 2564 { 2565 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2566 sppp_phase_name(sp->pp_phase)); 2567 } 2568 2569 /* 2570 * Take upper layers down. We send the Down event first and 2571 * the Close second to prevent the upper layers from sending 2572 * ``a flurry of terminate-request packets'', as the RFC 2573 * describes it. 2574 */ 2575 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2576 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2577 (cps[i])->Down(sp); 2578 (cps[i])->Close(sp); 2579 } 2580 } 2581 2582 static void 2583 sppp_lcp_tls(struct sppp *sp) 2584 { 2585 STDDCL; 2586 2587 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2588 printf("%s: authentication failed %d times, not retrying again\n", 2589 sp->pp_if.if_xname, sp->pp_auth_failures); 2590 if_down(&sp->pp_if); 2591 return; 2592 } 2593 2594 sp->pp_phase = SPPP_PHASE_ESTABLISH; 2595 2596 if(debug) 2597 { 2598 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2599 sppp_phase_name(sp->pp_phase)); 2600 } 2601 2602 /* Notify lower layer if desired. */ 2603 if (sp->pp_tls) 2604 (sp->pp_tls)(sp); 2605 } 2606 2607 static void 2608 sppp_lcp_tlf(struct sppp *sp) 2609 { 2610 STDDCL; 2611 2612 sp->pp_phase = SPPP_PHASE_DEAD; 2613 2614 if(debug) 2615 { 2616 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2617 sppp_phase_name(sp->pp_phase)); 2618 } 2619 2620 /* Notify lower layer if desired. */ 2621 if (sp->pp_tlf) 2622 (sp->pp_tlf)(sp); 2623 } 2624 2625 static void 2626 sppp_lcp_scr(struct sppp *sp) 2627 { 2628 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2629 int i = 0; 2630 u_short authproto; 2631 2632 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2633 if (! sp->lcp.magic) 2634 sp->lcp.magic = random(); 2635 opt[i++] = LCP_OPT_MAGIC; 2636 opt[i++] = 6; 2637 opt[i++] = sp->lcp.magic >> 24; 2638 opt[i++] = sp->lcp.magic >> 16; 2639 opt[i++] = sp->lcp.magic >> 8; 2640 opt[i++] = sp->lcp.magic; 2641 } 2642 2643 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2644 opt[i++] = LCP_OPT_MRU; 2645 opt[i++] = 4; 2646 opt[i++] = sp->lcp.mru >> 8; 2647 opt[i++] = sp->lcp.mru; 2648 } 2649 2650 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2651 authproto = sp->hisauth.proto; 2652 opt[i++] = LCP_OPT_AUTH_PROTO; 2653 opt[i++] = authproto == PPP_CHAP? 5: 4; 2654 opt[i++] = authproto >> 8; 2655 opt[i++] = authproto; 2656 if (authproto == PPP_CHAP) 2657 opt[i++] = CHAP_MD5; 2658 } 2659 2660 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2661 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2662 } 2663 2664 /* 2665 * Check the open NCPs, return true if at least one NCP is open. 2666 */ 2667 static int 2668 sppp_ncp_check(struct sppp *sp) 2669 { 2670 int i, mask; 2671 2672 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2673 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2674 return 1; 2675 return 0; 2676 } 2677 2678 /* 2679 * Re-check the open NCPs and see if we should terminate the link. 2680 * Called by the NCPs during their tlf action handling. 2681 */ 2682 static void 2683 sppp_lcp_check_and_close(struct sppp *sp) 2684 { 2685 2686 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2687 /* don't bother, we are already going down */ 2688 return; 2689 2690 if (sppp_ncp_check(sp)) 2691 return; 2692 2693 lcp.Close(sp); 2694 } 2695 2696 2697 /* 2698 *--------------------------------------------------------------------------* 2699 * * 2700 * The IPCP implementation. * 2701 * * 2702 *--------------------------------------------------------------------------* 2703 */ 2704 2705 static void 2706 sppp_ipcp_init(struct sppp *sp) 2707 { 2708 sp->ipcp.opts = 0; 2709 sp->ipcp.flags = 0; 2710 sp->state[IDX_IPCP] = STATE_INITIAL; 2711 sp->fail_counter[IDX_IPCP] = 0; 2712 sp->pp_seq[IDX_IPCP] = 0; 2713 sp->pp_rseq[IDX_IPCP] = 0; 2714 callout_init(&sp->ch[IDX_IPCP]); 2715 } 2716 2717 static void 2718 sppp_ipcp_up(struct sppp *sp) 2719 { 2720 sppp_up_event(&ipcp, sp); 2721 } 2722 2723 static void 2724 sppp_ipcp_down(struct sppp *sp) 2725 { 2726 sppp_down_event(&ipcp, sp); 2727 } 2728 2729 static void 2730 sppp_ipcp_open(struct sppp *sp) 2731 { 2732 STDDCL; 2733 u_int32_t myaddr, hisaddr; 2734 2735 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 2736 sp->ipcp.req_myaddr = 0; 2737 sp->ipcp.req_hisaddr = 0; 2738 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 2739 2740 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 2741 /* 2742 * If we don't have his address, this probably means our 2743 * interface doesn't want to talk IP at all. (This could 2744 * be the case if somebody wants to speak only IPX, for 2745 * example.) Don't open IPCP in this case. 2746 */ 2747 if (hisaddr == 0L) { 2748 /* XXX this message should go away */ 2749 if (debug) 2750 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n", 2751 SPP_ARGS(ifp)); 2752 return; 2753 } 2754 2755 if (myaddr == 0) { 2756 /* 2757 * I don't have an assigned address, so i need to 2758 * negotiate my address. 2759 */ 2760 sp->ipcp.flags |= IPCP_MYADDR_DYN; 2761 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2762 } 2763 if (hisaddr == 1) { 2764 /* 2765 * XXX - remove this hack! 2766 * remote has no valid adress, we need to get one assigned. 2767 */ 2768 sp->ipcp.flags |= IPCP_HISADDR_DYN; 2769 } 2770 sppp_open_event(&ipcp, sp); 2771 } 2772 2773 static void 2774 sppp_ipcp_close(struct sppp *sp) 2775 { 2776 STDDCL; 2777 2778 sppp_close_event(&ipcp, sp); 2779 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 2780 /* 2781 * Some address was dynamic, clear it again. 2782 */ 2783 sppp_clear_ip_addrs(sp); 2784 2785 if (sp->pp_saved_mtu > 0) { 2786 ifp->if_mtu = sp->pp_saved_mtu; 2787 sp->pp_saved_mtu = 0; 2788 if (debug) 2789 log(LOG_DEBUG, 2790 SPP_FMT "resetting MTU to %" PRIu64 " bytes\n", 2791 SPP_ARGS(ifp), ifp->if_mtu); 2792 } 2793 } 2794 2795 static void 2796 sppp_ipcp_TO(void *cookie) 2797 { 2798 sppp_to_event(&ipcp, (struct sppp *)cookie); 2799 } 2800 2801 /* 2802 * Analyze a configure request. Return true if it was agreeable, and 2803 * caused action sca, false if it has been rejected or nak'ed, and 2804 * caused action scn. (The return value is used to make the state 2805 * transition decision in the state automaton.) 2806 */ 2807 static int 2808 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2809 { 2810 u_char *buf, *r, *p; 2811 struct ifnet *ifp = &sp->pp_if; 2812 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 2813 u_int32_t hisaddr, desiredaddr; 2814 2815 len -= 4; 2816 origlen = len; 2817 /* 2818 * Make sure to allocate a buf that can at least hold a 2819 * conf-nak with an `address' option. We might need it below. 2820 */ 2821 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 2822 if (! buf) 2823 return (0); 2824 2825 /* pass 1: see if we can recognize them */ 2826 if (debug) 2827 log(LOG_DEBUG, SPP_FMT "ipcp parse opts:", 2828 SPP_ARGS(ifp)); 2829 p = (void *)(h + 1); 2830 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2831 if (debug) 2832 addlog(" %s", sppp_ipcp_opt_name(*p)); 2833 switch (*p) { 2834 #ifdef notyet 2835 case IPCP_OPT_COMPRESSION: 2836 if (len >= 6 && p[1] >= 6) { 2837 /* correctly formed compress option */ 2838 continue; 2839 } 2840 if (debug) 2841 addlog(" [invalid]"); 2842 break; 2843 #endif 2844 case IPCP_OPT_ADDRESS: 2845 if (len >= 6 && p[1] == 6) { 2846 /* correctly formed address option */ 2847 continue; 2848 } 2849 if (debug) 2850 addlog(" [invalid]"); 2851 break; 2852 default: 2853 /* Others not supported. */ 2854 if (debug) 2855 addlog(" [rej]"); 2856 break; 2857 } 2858 /* Add the option to rejected list. */ 2859 bcopy (p, r, p[1]); 2860 r += p[1]; 2861 rlen += p[1]; 2862 } 2863 if (rlen) { 2864 if (debug) 2865 addlog(" send conf-rej\n"); 2866 sppp_cp_send(sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 2867 goto end; 2868 } else if (debug) 2869 addlog("\n"); 2870 2871 /* pass 2: parse option values */ 2872 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 2873 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 2874 else 2875 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 2876 if (debug) 2877 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ", 2878 SPP_ARGS(ifp)); 2879 p = (void *)(h + 1); 2880 len = origlen; 2881 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2882 if (debug) 2883 addlog(" %s", sppp_ipcp_opt_name(*p)); 2884 switch (*p) { 2885 #ifdef notyet 2886 case IPCP_OPT_COMPRESSION: 2887 continue; 2888 #endif 2889 case IPCP_OPT_ADDRESS: 2890 desiredaddr = p[2] << 24 | p[3] << 16 | 2891 p[4] << 8 | p[5]; 2892 if (desiredaddr == hisaddr || 2893 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 2894 /* 2895 * Peer's address is same as our value, 2896 * this is agreeable. Gonna conf-ack 2897 * it. 2898 */ 2899 if (debug) 2900 addlog(" %s [ack]", 2901 sppp_dotted_quad(hisaddr)); 2902 /* record that we've seen it already */ 2903 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 2904 sp->ipcp.req_hisaddr = desiredaddr; 2905 hisaddr = desiredaddr; 2906 continue; 2907 } 2908 /* 2909 * The address wasn't agreeable. This is either 2910 * he sent us 0.0.0.0, asking to assign him an 2911 * address, or he send us another address not 2912 * matching our value. Either case, we gonna 2913 * conf-nak it with our value. 2914 */ 2915 if (debug) { 2916 if (desiredaddr == 0) 2917 addlog(" [addr requested]"); 2918 else 2919 addlog(" %s [not agreed]", 2920 sppp_dotted_quad(desiredaddr)); 2921 } 2922 2923 p[2] = hisaddr >> 24; 2924 p[3] = hisaddr >> 16; 2925 p[4] = hisaddr >> 8; 2926 p[5] = hisaddr; 2927 break; 2928 } 2929 /* Add the option to nak'ed list. */ 2930 bcopy (p, r, p[1]); 2931 r += p[1]; 2932 rlen += p[1]; 2933 } 2934 2935 /* 2936 * If we are about to conf-ack the request, but haven't seen 2937 * his address so far, gonna conf-nak it instead, with the 2938 * `address' option present and our idea of his address being 2939 * filled in there, to request negotiation of both addresses. 2940 * 2941 * XXX This can result in an endless req - nak loop if peer 2942 * doesn't want to send us his address. Q: What should we do 2943 * about it? XXX A: implement the max-failure counter. 2944 */ 2945 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 2946 buf[0] = IPCP_OPT_ADDRESS; 2947 buf[1] = 6; 2948 buf[2] = hisaddr >> 24; 2949 buf[3] = hisaddr >> 16; 2950 buf[4] = hisaddr >> 8; 2951 buf[5] = hisaddr; 2952 rlen = 6; 2953 if (debug) 2954 addlog(" still need hisaddr"); 2955 } 2956 2957 if (rlen) { 2958 if (debug) 2959 addlog(" send conf-nak\n"); 2960 sppp_cp_send(sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 2961 } else { 2962 if (debug) 2963 addlog(" send conf-ack\n"); 2964 sppp_cp_send(sp, PPP_IPCP, CONF_ACK, h->ident, origlen, h + 1); 2965 } 2966 2967 end: 2968 free(buf, M_TEMP); 2969 return (rlen == 0); 2970 } 2971 2972 /* 2973 * Analyze the IPCP Configure-Reject option list, and adjust our 2974 * negotiation. 2975 */ 2976 static void 2977 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2978 { 2979 u_char *buf, *p; 2980 struct ifnet *ifp = &sp->pp_if; 2981 int debug = ifp->if_flags & IFF_DEBUG; 2982 2983 len -= 4; 2984 buf = malloc (len, M_TEMP, M_NOWAIT); 2985 if (!buf) 2986 return; 2987 2988 if (debug) 2989 log(LOG_DEBUG, SPP_FMT "ipcp rej opts:", 2990 SPP_ARGS(ifp)); 2991 2992 p = (void *)(h + 1); 2993 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2994 if (debug) 2995 addlog(" %s", sppp_ipcp_opt_name(*p)); 2996 switch (*p) { 2997 case IPCP_OPT_ADDRESS: 2998 /* 2999 * Peer doesn't grok address option. This is 3000 * bad. XXX Should we better give up here? 3001 */ 3002 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 3003 break; 3004 #ifdef notyet 3005 case IPCP_OPT_COMPRESS: 3006 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 3007 break; 3008 #endif 3009 } 3010 } 3011 if (debug) 3012 addlog("\n"); 3013 free(buf, M_TEMP); 3014 return; 3015 } 3016 3017 /* 3018 * Analyze the IPCP Configure-NAK option list, and adjust our 3019 * negotiation. 3020 */ 3021 static void 3022 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3023 { 3024 u_char *p; 3025 struct ifnet *ifp = &sp->pp_if; 3026 int debug = ifp->if_flags & IFF_DEBUG; 3027 u_int32_t wantaddr; 3028 3029 len -= 4; 3030 3031 if (debug) 3032 log(LOG_DEBUG, SPP_FMT "ipcp nak opts:", 3033 SPP_ARGS(ifp)); 3034 3035 p = (void *)(h + 1); 3036 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3037 if (debug) 3038 addlog(" %s", sppp_ipcp_opt_name(*p)); 3039 switch (*p) { 3040 case IPCP_OPT_ADDRESS: 3041 /* 3042 * Peer doesn't like our local IP address. See 3043 * if we can do something for him. We'll drop 3044 * him our address then. 3045 */ 3046 if (len >= 6 && p[1] == 6) { 3047 wantaddr = p[2] << 24 | p[3] << 16 | 3048 p[4] << 8 | p[5]; 3049 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3050 if (debug) 3051 addlog(" [wantaddr %s]", 3052 sppp_dotted_quad(wantaddr)); 3053 /* 3054 * When doing dynamic address assignment, 3055 * we accept his offer. Otherwise, we 3056 * ignore it and thus continue to negotiate 3057 * our already existing value. 3058 */ 3059 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3060 if (debug) 3061 addlog(" [agree]"); 3062 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3063 sp->ipcp.req_myaddr = wantaddr; 3064 } 3065 } 3066 break; 3067 3068 case IPCP_OPT_PRIMDNS: 3069 if (len >= 6 && p[1] == 6) { 3070 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3071 p[4] << 8 | p[5]; 3072 } 3073 break; 3074 3075 case IPCP_OPT_SECDNS: 3076 if (len >= 6 && p[1] == 6) { 3077 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3078 p[4] << 8 | p[5]; 3079 } 3080 break; 3081 #ifdef notyet 3082 case IPCP_OPT_COMPRESS: 3083 /* 3084 * Peer wants different compression parameters. 3085 */ 3086 break; 3087 #endif 3088 } 3089 } 3090 if (debug) 3091 addlog("\n"); 3092 return; 3093 } 3094 3095 static void 3096 sppp_ipcp_tlu(struct sppp *sp) 3097 { 3098 /* we are up. Set addresses and notify anyone interested */ 3099 STDDCL; 3100 u_int32_t myaddr, hisaddr; 3101 3102 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3103 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 3104 myaddr = sp->ipcp.req_myaddr; 3105 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 3106 hisaddr = sp->ipcp.req_hisaddr; 3107 sppp_set_ip_addrs(sp, myaddr, hisaddr); 3108 3109 if (ifp->if_mtu > sp->lcp.their_mru) { 3110 sp->pp_saved_mtu = ifp->if_mtu; 3111 ifp->if_mtu = sp->lcp.their_mru; 3112 if (debug) 3113 log(LOG_DEBUG, 3114 SPP_FMT "setting MTU to %" PRIu64 " bytes\n", 3115 SPP_ARGS(ifp), ifp->if_mtu); 3116 } 3117 3118 if (sp->pp_con) 3119 sp->pp_con(sp); 3120 } 3121 3122 static void 3123 sppp_ipcp_tld(struct sppp *sp) 3124 { 3125 } 3126 3127 static void 3128 sppp_ipcp_tls(struct sppp *sp) 3129 { 3130 /* indicate to LCP that it must stay alive */ 3131 sp->lcp.protos |= (1 << IDX_IPCP); 3132 } 3133 3134 static void 3135 sppp_ipcp_tlf(struct sppp *sp) 3136 { 3137 /* we no longer need LCP */ 3138 sp->lcp.protos &= ~(1 << IDX_IPCP); 3139 } 3140 3141 static void 3142 sppp_ipcp_scr(struct sppp *sp) 3143 { 3144 char opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3145 u_int32_t ouraddr; 3146 int i = 0; 3147 3148 #ifdef notyet 3149 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3150 opt[i++] = IPCP_OPT_COMPRESSION; 3151 opt[i++] = 6; 3152 opt[i++] = 0; /* VJ header compression */ 3153 opt[i++] = 0x2d; /* VJ header compression */ 3154 opt[i++] = max_slot_id; 3155 opt[i++] = comp_slot_id; 3156 } 3157 #endif 3158 3159 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3160 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3161 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3162 else 3163 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3164 opt[i++] = IPCP_OPT_ADDRESS; 3165 opt[i++] = 6; 3166 opt[i++] = ouraddr >> 24; 3167 opt[i++] = ouraddr >> 16; 3168 opt[i++] = ouraddr >> 8; 3169 opt[i++] = ouraddr; 3170 } 3171 3172 if (sp->query_dns & 1) { 3173 opt[i++] = IPCP_OPT_PRIMDNS; 3174 opt[i++] = 6; 3175 opt[i++] = sp->dns_addrs[0] >> 24; 3176 opt[i++] = sp->dns_addrs[0] >> 16; 3177 opt[i++] = sp->dns_addrs[0] >> 8; 3178 opt[i++] = sp->dns_addrs[0]; 3179 } 3180 if (sp->query_dns & 2) { 3181 opt[i++] = IPCP_OPT_SECDNS; 3182 opt[i++] = 6; 3183 opt[i++] = sp->dns_addrs[1] >> 24; 3184 opt[i++] = sp->dns_addrs[1] >> 16; 3185 opt[i++] = sp->dns_addrs[1] >> 8; 3186 opt[i++] = sp->dns_addrs[1]; 3187 } 3188 3189 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3190 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3191 } 3192 3193 3194 /* 3195 *--------------------------------------------------------------------------* 3196 * * 3197 * The IPv6CP implementation. * 3198 * * 3199 *--------------------------------------------------------------------------* 3200 */ 3201 3202 #ifdef INET6 3203 static void 3204 sppp_ipv6cp_init(struct sppp *sp) 3205 { 3206 sp->ipv6cp.opts = 0; 3207 sp->ipv6cp.flags = 0; 3208 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3209 sp->fail_counter[IDX_IPV6CP] = 0; 3210 sp->pp_seq[IDX_IPV6CP] = 0; 3211 sp->pp_rseq[IDX_IPV6CP] = 0; 3212 callout_init(&sp->ch[IDX_IPV6CP]); 3213 } 3214 3215 static void 3216 sppp_ipv6cp_up(struct sppp *sp) 3217 { 3218 sppp_up_event(&ipv6cp, sp); 3219 } 3220 3221 static void 3222 sppp_ipv6cp_down(struct sppp *sp) 3223 { 3224 sppp_down_event(&ipv6cp, sp); 3225 } 3226 3227 static void 3228 sppp_ipv6cp_open(struct sppp *sp) 3229 { 3230 STDDCL; 3231 struct in6_addr myaddr, hisaddr; 3232 3233 #ifdef IPV6CP_MYIFID_DYN 3234 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3235 #else 3236 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3237 #endif 3238 3239 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3240 /* 3241 * If we don't have our address, this probably means our 3242 * interface doesn't want to talk IPv6 at all. (This could 3243 * be the case if somebody wants to speak only IPX, for 3244 * example.) Don't open IPv6CP in this case. 3245 */ 3246 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3247 /* XXX this message should go away */ 3248 if (debug) 3249 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n", 3250 SPP_ARGS(ifp)); 3251 return; 3252 } 3253 3254 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3255 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3256 sppp_open_event(&ipv6cp, sp); 3257 } 3258 3259 static void 3260 sppp_ipv6cp_close(struct sppp *sp) 3261 { 3262 sppp_close_event(&ipv6cp, sp); 3263 } 3264 3265 static void 3266 sppp_ipv6cp_TO(void *cookie) 3267 { 3268 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3269 } 3270 3271 /* 3272 * Analyze a configure request. Return true if it was agreeable, and 3273 * caused action sca, false if it has been rejected or nak'ed, and 3274 * caused action scn. (The return value is used to make the state 3275 * transition decision in the state automaton.) 3276 */ 3277 static int 3278 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3279 { 3280 u_char *buf, *r, *p; 3281 struct ifnet *ifp = &sp->pp_if; 3282 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3283 struct in6_addr myaddr, desiredaddr, suggestaddr; 3284 int ifidcount; 3285 int type; 3286 int collision, nohisaddr; 3287 3288 len -= 4; 3289 origlen = len; 3290 /* 3291 * Make sure to allocate a buf that can at least hold a 3292 * conf-nak with an `address' option. We might need it below. 3293 */ 3294 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 3295 if (! buf) 3296 return (0); 3297 3298 /* pass 1: see if we can recognize them */ 3299 if (debug) 3300 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:", 3301 SPP_ARGS(ifp)); 3302 p = (void *)(h + 1); 3303 ifidcount = 0; 3304 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3305 if (debug) 3306 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3307 switch (*p) { 3308 case IPV6CP_OPT_IFID: 3309 if (len >= 10 && p[1] == 10 && ifidcount == 0) { 3310 /* correctly formed address option */ 3311 ifidcount++; 3312 continue; 3313 } 3314 if (debug) 3315 addlog(" [invalid]"); 3316 break; 3317 #ifdef notyet 3318 case IPV6CP_OPT_COMPRESSION: 3319 if (len >= 4 && p[1] >= 4) { 3320 /* correctly formed compress option */ 3321 continue; 3322 } 3323 if (debug) 3324 addlog(" [invalid]"); 3325 break; 3326 #endif 3327 default: 3328 /* Others not supported. */ 3329 if (debug) 3330 addlog(" [rej]"); 3331 break; 3332 } 3333 /* Add the option to rejected list. */ 3334 bcopy (p, r, p[1]); 3335 r += p[1]; 3336 rlen += p[1]; 3337 } 3338 if (rlen) { 3339 if (debug) 3340 addlog(" send conf-rej\n"); 3341 sppp_cp_send(sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3342 goto end; 3343 } else if (debug) 3344 addlog("\n"); 3345 3346 /* pass 2: parse option values */ 3347 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3348 if (debug) 3349 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ", 3350 SPP_ARGS(ifp)); 3351 p = (void *)(h + 1); 3352 len = origlen; 3353 type = CONF_ACK; 3354 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3355 if (debug) 3356 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3357 switch (*p) { 3358 #ifdef notyet 3359 case IPV6CP_OPT_COMPRESSION: 3360 continue; 3361 #endif 3362 case IPV6CP_OPT_IFID: 3363 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3364 bcopy(&p[2], &desiredaddr.s6_addr[8], 8); 3365 collision = (memcmp(&desiredaddr.s6_addr[8], 3366 &myaddr.s6_addr[8], 8) == 0); 3367 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3368 3369 desiredaddr.s6_addr16[0] = htons(0xfe80); 3370 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3371 3372 if (!collision && !nohisaddr) { 3373 /* no collision, hisaddr known - Conf-Ack */ 3374 type = CONF_ACK; 3375 3376 if (debug) { 3377 addlog(" %s [%s]", 3378 ip6_sprintf(&desiredaddr), 3379 sppp_cp_type_name(type)); 3380 } 3381 continue; 3382 } 3383 3384 memset(&suggestaddr, 0, sizeof(&suggestaddr)); 3385 if (collision && nohisaddr) { 3386 /* collision, hisaddr unknown - Conf-Rej */ 3387 type = CONF_REJ; 3388 memset(&p[2], 0, 8); 3389 } else { 3390 /* 3391 * - no collision, hisaddr unknown, or 3392 * - collision, hisaddr known 3393 * Conf-Nak, suggest hisaddr 3394 */ 3395 type = CONF_NAK; 3396 sppp_suggest_ip6_addr(sp, &suggestaddr); 3397 bcopy(&suggestaddr.s6_addr[8], &p[2], 8); 3398 } 3399 if (debug) 3400 addlog(" %s [%s]", ip6_sprintf(&desiredaddr), 3401 sppp_cp_type_name(type)); 3402 break; 3403 } 3404 /* Add the option to nak'ed list. */ 3405 bcopy (p, r, p[1]); 3406 r += p[1]; 3407 rlen += p[1]; 3408 } 3409 3410 if (rlen == 0 && type == CONF_ACK) { 3411 if (debug) 3412 addlog(" send %s\n", sppp_cp_type_name(type)); 3413 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, origlen, h + 1); 3414 } else { 3415 #ifdef notdef 3416 if (type == CONF_ACK) 3417 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3418 #endif 3419 3420 if (debug) { 3421 addlog(" send %s suggest %s\n", 3422 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); 3423 } 3424 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3425 } 3426 3427 end: 3428 free(buf, M_TEMP); 3429 return (rlen == 0); 3430 } 3431 3432 /* 3433 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3434 * negotiation. 3435 */ 3436 static void 3437 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3438 { 3439 u_char *buf, *p; 3440 struct ifnet *ifp = &sp->pp_if; 3441 int debug = ifp->if_flags & IFF_DEBUG; 3442 3443 len -= 4; 3444 buf = malloc (len, M_TEMP, M_NOWAIT); 3445 if (!buf) 3446 return; 3447 3448 if (debug) 3449 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:", 3450 SPP_ARGS(ifp)); 3451 3452 p = (void *)(h + 1); 3453 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3454 if (debug) 3455 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3456 switch (*p) { 3457 case IPV6CP_OPT_IFID: 3458 /* 3459 * Peer doesn't grok address option. This is 3460 * bad. XXX Should we better give up here? 3461 */ 3462 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3463 break; 3464 #ifdef notyet 3465 case IPV6CP_OPT_COMPRESS: 3466 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3467 break; 3468 #endif 3469 } 3470 } 3471 if (debug) 3472 addlog("\n"); 3473 free(buf, M_TEMP); 3474 return; 3475 } 3476 3477 /* 3478 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3479 * negotiation. 3480 */ 3481 static void 3482 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3483 { 3484 u_char *buf, *p; 3485 struct ifnet *ifp = &sp->pp_if; 3486 int debug = ifp->if_flags & IFF_DEBUG; 3487 struct in6_addr suggestaddr; 3488 3489 len -= 4; 3490 buf = malloc (len, M_TEMP, M_NOWAIT); 3491 if (!buf) 3492 return; 3493 3494 if (debug) 3495 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:", 3496 SPP_ARGS(ifp)); 3497 3498 p = (void *)(h + 1); 3499 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3500 if (debug) 3501 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3502 switch (*p) { 3503 case IPV6CP_OPT_IFID: 3504 /* 3505 * Peer doesn't like our local ifid. See 3506 * if we can do something for him. We'll drop 3507 * him our address then. 3508 */ 3509 if (len < 10 || p[1] != 10) 3510 break; 3511 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3512 suggestaddr.s6_addr16[0] = htons(0xfe80); 3513 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3514 bcopy(&p[2], &suggestaddr.s6_addr[8], 8); 3515 3516 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3517 if (debug) 3518 addlog(" [suggestaddr %s]", 3519 ip6_sprintf(&suggestaddr)); 3520 #ifdef IPV6CP_MYIFID_DYN 3521 /* 3522 * When doing dynamic address assignment, 3523 * we accept his offer. 3524 */ 3525 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3526 struct in6_addr lastsuggest; 3527 /* 3528 * If <suggested myaddr from peer> equals to 3529 * <hisaddr we have suggested last time>, 3530 * we have a collision. generate new random 3531 * ifid. 3532 */ 3533 sppp_suggest_ip6_addr(&lastsuggest); 3534 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3535 lastsuggest)) { 3536 if (debug) 3537 addlog(" [random]"); 3538 sppp_gen_ip6_addr(sp, &suggestaddr); 3539 } 3540 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3541 if (debug) 3542 addlog(" [agree]"); 3543 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3544 } 3545 #else 3546 /* 3547 * Since we do not do dynamic address assignment, 3548 * we ignore it and thus continue to negotiate 3549 * our already existing value. This can possibly 3550 * go into infinite request-reject loop. 3551 * 3552 * This is not likely because we normally use 3553 * ifid based on MAC-address. 3554 * If you have no ethernet card on the node, too bad. 3555 * XXX should we use fail_counter? 3556 */ 3557 #endif 3558 break; 3559 #ifdef notyet 3560 case IPV6CP_OPT_COMPRESS: 3561 /* 3562 * Peer wants different compression parameters. 3563 */ 3564 break; 3565 #endif 3566 } 3567 } 3568 if (debug) 3569 addlog("\n"); 3570 free(buf, M_TEMP); 3571 return; 3572 } 3573 3574 static void 3575 sppp_ipv6cp_tlu(struct sppp *sp) 3576 { 3577 /* we are up - notify isdn daemon */ 3578 if (sp->pp_con) 3579 sp->pp_con(sp); 3580 } 3581 3582 static void 3583 sppp_ipv6cp_tld(struct sppp *sp) 3584 { 3585 } 3586 3587 static void 3588 sppp_ipv6cp_tls(struct sppp *sp) 3589 { 3590 /* indicate to LCP that it must stay alive */ 3591 sp->lcp.protos |= (1 << IDX_IPV6CP); 3592 } 3593 3594 static void 3595 sppp_ipv6cp_tlf(struct sppp *sp) 3596 { 3597 /* we no longer need LCP */ 3598 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3599 } 3600 3601 static void 3602 sppp_ipv6cp_scr(struct sppp *sp) 3603 { 3604 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3605 struct in6_addr ouraddr; 3606 int i = 0; 3607 3608 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3609 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3610 opt[i++] = IPV6CP_OPT_IFID; 3611 opt[i++] = 10; 3612 bcopy(&ouraddr.s6_addr[8], &opt[i], 8); 3613 i += 8; 3614 } 3615 3616 #ifdef notyet 3617 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3618 opt[i++] = IPV6CP_OPT_COMPRESSION; 3619 opt[i++] = 4; 3620 opt[i++] = 0; /* TBD */ 3621 opt[i++] = 0; /* TBD */ 3622 /* variable length data may follow */ 3623 } 3624 #endif 3625 3626 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3627 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 3628 } 3629 #else /*INET6*/ 3630 static void sppp_ipv6cp_init(struct sppp *sp) 3631 { 3632 } 3633 3634 static void sppp_ipv6cp_up(struct sppp *sp) 3635 { 3636 } 3637 3638 static void sppp_ipv6cp_down(struct sppp *sp) 3639 { 3640 } 3641 3642 3643 static void sppp_ipv6cp_open(struct sppp *sp) 3644 { 3645 } 3646 3647 static void sppp_ipv6cp_close(struct sppp *sp) 3648 { 3649 } 3650 3651 static void sppp_ipv6cp_TO(void *sp) 3652 { 3653 } 3654 3655 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3656 { 3657 return 0; 3658 } 3659 3660 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3661 { 3662 } 3663 3664 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3665 { 3666 } 3667 3668 static void sppp_ipv6cp_tlu(struct sppp *sp) 3669 { 3670 } 3671 3672 static void sppp_ipv6cp_tld(struct sppp *sp) 3673 { 3674 } 3675 3676 static void sppp_ipv6cp_tls(struct sppp *sp) 3677 { 3678 } 3679 3680 static void sppp_ipv6cp_tlf(struct sppp *sp) 3681 { 3682 } 3683 3684 static void sppp_ipv6cp_scr(struct sppp *sp) 3685 { 3686 } 3687 #endif /*INET6*/ 3688 3689 3690 /* 3691 *--------------------------------------------------------------------------* 3692 * * 3693 * The CHAP implementation. * 3694 * * 3695 *--------------------------------------------------------------------------* 3696 */ 3697 3698 /* 3699 * The authentication protocols don't employ a full-fledged state machine as 3700 * the control protocols do, since they do have Open and Close events, but 3701 * not Up and Down, nor are they explicitly terminated. Also, use of the 3702 * authentication protocols may be different in both directions (this makes 3703 * sense, think of a machine that never accepts incoming calls but only 3704 * calls out, it doesn't require the called party to authenticate itself). 3705 * 3706 * Our state machine for the local authentication protocol (we are requesting 3707 * the peer to authenticate) looks like: 3708 * 3709 * RCA- 3710 * +--------------------------------------------+ 3711 * V scn,tld| 3712 * +--------+ Close +---------+ RCA+ 3713 * | |<----------------------------------| |------+ 3714 * +--->| Closed | TO* | Opened | sca | 3715 * | | |-----+ +-------| |<-----+ 3716 * | +--------+ irc | | +---------+ 3717 * | ^ | | ^ 3718 * | | | | | 3719 * | | | | | 3720 * | TO-| | | | 3721 * | |tld TO+ V | | 3722 * | | +------->+ | | 3723 * | | | | | | 3724 * | +--------+ V | | 3725 * | | |<----+<--------------------+ | 3726 * | | Req- | scr | 3727 * | | Sent | | 3728 * | | | | 3729 * | +--------+ | 3730 * | RCA- | | RCA+ | 3731 * +------+ +------------------------------------------+ 3732 * scn,tld sca,irc,ict,tlu 3733 * 3734 * 3735 * with: 3736 * 3737 * Open: LCP reached authentication phase 3738 * Close: LCP reached terminate phase 3739 * 3740 * RCA+: received reply (pap-req, chap-response), acceptable 3741 * RCN: received reply (pap-req, chap-response), not acceptable 3742 * TO+: timeout with restart counter >= 0 3743 * TO-: timeout with restart counter < 0 3744 * TO*: reschedule timeout for CHAP 3745 * 3746 * scr: send request packet (none for PAP, chap-challenge) 3747 * sca: send ack packet (pap-ack, chap-success) 3748 * scn: send nak packet (pap-nak, chap-failure) 3749 * ict: initialize re-challenge timer (CHAP only) 3750 * 3751 * tlu: this-layer-up, LCP reaches network phase 3752 * tld: this-layer-down, LCP enters terminate phase 3753 * 3754 * Note that in CHAP mode, after sending a new challenge, while the state 3755 * automaton falls back into Req-Sent state, it doesn't signal a tld 3756 * event to LCP, so LCP remains in network phase. Only after not getting 3757 * any response (or after getting an unacceptable response), CHAP closes, 3758 * causing LCP to enter terminate phase. 3759 * 3760 * With PAP, there is no initial request that can be sent. The peer is 3761 * expected to send one based on the successful negotiation of PAP as 3762 * the authentication protocol during the LCP option negotiation. 3763 * 3764 * Incoming authentication protocol requests (remote requests 3765 * authentication, we are peer) don't employ a state machine at all, 3766 * they are simply answered. Some peers [Ascend P50 firmware rev 3767 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 3768 * still in authentication phase (thereby violating the standard that 3769 * demands that these NCP packets are to be discarded), so we keep 3770 * track of the peer demanding us to authenticate, and only proceed to 3771 * phase network once we've seen a positive acknowledge for the 3772 * authentication. 3773 */ 3774 3775 /* 3776 * Handle incoming CHAP packets. 3777 */ 3778 void 3779 sppp_chap_input(struct sppp *sp, struct mbuf *m) 3780 { 3781 STDDCL; 3782 struct lcp_header *h; 3783 int len, x; 3784 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 3785 int value_len, name_len; 3786 MD5_CTX ctx; 3787 3788 len = m->m_pkthdr.len; 3789 if (len < 4) { 3790 if (debug) 3791 log(LOG_DEBUG, 3792 SPP_FMT "chap invalid packet length: %d bytes\n", 3793 SPP_ARGS(ifp), len); 3794 return; 3795 } 3796 h = mtod(m, struct lcp_header *); 3797 if (len > ntohs(h->len)) 3798 len = ntohs(h->len); 3799 3800 switch (h->type) { 3801 /* challenge, failure and success are his authproto */ 3802 case CHAP_CHALLENGE: 3803 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 3804 /* can't do anything usefull */ 3805 sp->pp_auth_failures++; 3806 printf(SPP_FMT "chap input without my name and my secret being set\n", 3807 SPP_ARGS(ifp)); 3808 break; 3809 } 3810 value = 1 + (u_char *)(h + 1); 3811 value_len = value[-1]; 3812 name = value + value_len; 3813 name_len = len - value_len - 5; 3814 if (name_len < 0) { 3815 if (debug) { 3816 log(LOG_DEBUG, 3817 SPP_FMT "chap corrupted challenge " 3818 "<%s id=0x%x len=%d", 3819 SPP_ARGS(ifp), 3820 sppp_auth_type_name(PPP_CHAP, h->type), 3821 h->ident, ntohs(h->len)); 3822 if (len > 4) 3823 sppp_print_bytes((u_char *)(h + 1), 3824 len - 4); 3825 addlog(">\n"); 3826 } 3827 break; 3828 } 3829 3830 if (debug) { 3831 log(LOG_DEBUG, 3832 SPP_FMT "chap input <%s id=0x%x len=%d name=", 3833 SPP_ARGS(ifp), 3834 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 3835 ntohs(h->len)); 3836 sppp_print_string((char *) name, name_len); 3837 addlog(" value-size=%d value=", value_len); 3838 sppp_print_bytes(value, value_len); 3839 addlog(">\n"); 3840 } 3841 3842 /* Compute reply value. */ 3843 MD5Init(&ctx); 3844 MD5Update(&ctx, &h->ident, 1); 3845 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 3846 MD5Update(&ctx, value, value_len); 3847 MD5Final(digest, &ctx); 3848 dsize = sizeof digest; 3849 3850 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 3851 sizeof dsize, (const char *)&dsize, 3852 sizeof digest, digest, 3853 sp->myauth.name_len, 3854 sp->myauth.name, 3855 0); 3856 break; 3857 3858 case CHAP_SUCCESS: 3859 if (debug) { 3860 log(LOG_DEBUG, SPP_FMT "chap success", 3861 SPP_ARGS(ifp)); 3862 if (len > 4) { 3863 addlog(": "); 3864 sppp_print_string((char *)(h + 1), len - 4); 3865 } 3866 addlog("\n"); 3867 } 3868 x = splnet(); 3869 sp->pp_auth_failures = 0; 3870 sp->pp_flags &= ~PP_NEEDAUTH; 3871 if (sp->myauth.proto == PPP_CHAP && 3872 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 3873 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 3874 /* 3875 * We are authenticator for CHAP but didn't 3876 * complete yet. Leave it to tlu to proceed 3877 * to network phase. 3878 */ 3879 splx(x); 3880 break; 3881 } 3882 splx(x); 3883 sppp_phase_network(sp); 3884 break; 3885 3886 case CHAP_FAILURE: 3887 x = splnet(); 3888 sp->pp_auth_failures++; 3889 splx(x); 3890 if (debug) { 3891 log(LOG_INFO, SPP_FMT "chap failure", 3892 SPP_ARGS(ifp)); 3893 if (len > 4) { 3894 addlog(": "); 3895 sppp_print_string((char *)(h + 1), len - 4); 3896 } 3897 addlog("\n"); 3898 } else 3899 log(LOG_INFO, SPP_FMT "chap failure\n", 3900 SPP_ARGS(ifp)); 3901 /* await LCP shutdown by authenticator */ 3902 break; 3903 3904 /* response is my authproto */ 3905 case CHAP_RESPONSE: 3906 if (sp->hisauth.secret == NULL) { 3907 /* can't do anything usefull */ 3908 printf(SPP_FMT "chap input without his secret being set\n", 3909 SPP_ARGS(ifp)); 3910 break; 3911 } 3912 value = 1 + (u_char *)(h + 1); 3913 value_len = value[-1]; 3914 name = value + value_len; 3915 name_len = len - value_len - 5; 3916 if (name_len < 0) { 3917 if (debug) { 3918 log(LOG_DEBUG, 3919 SPP_FMT "chap corrupted response " 3920 "<%s id=0x%x len=%d", 3921 SPP_ARGS(ifp), 3922 sppp_auth_type_name(PPP_CHAP, h->type), 3923 h->ident, ntohs(h->len)); 3924 if (len > 4) 3925 sppp_print_bytes((u_char *)(h + 1), 3926 len - 4); 3927 addlog(">\n"); 3928 } 3929 break; 3930 } 3931 if (h->ident != sp->confid[IDX_CHAP]) { 3932 if (debug) 3933 log(LOG_DEBUG, 3934 SPP_FMT "chap dropping response for old ID " 3935 "(got %d, expected %d)\n", 3936 SPP_ARGS(ifp), 3937 h->ident, sp->confid[IDX_CHAP]); 3938 break; 3939 } 3940 if (sp->hisauth.name != NULL && 3941 (name_len != sp->hisauth.name_len 3942 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 3943 log(LOG_INFO, SPP_FMT "chap response, his name ", 3944 SPP_ARGS(ifp)); 3945 sppp_print_string(name, name_len); 3946 addlog(" != expected "); 3947 sppp_print_string(sp->hisauth.name, 3948 sp->hisauth.name_len); 3949 addlog("\n"); 3950 goto chap_failure; 3951 } 3952 if (debug) { 3953 log(LOG_DEBUG, SPP_FMT "chap input(%s) " 3954 "<%s id=0x%x len=%d name=", 3955 SPP_ARGS(ifp), 3956 sppp_state_name(sp->state[IDX_CHAP]), 3957 sppp_auth_type_name(PPP_CHAP, h->type), 3958 h->ident, ntohs(h->len)); 3959 sppp_print_string((char *)name, name_len); 3960 addlog(" value-size=%d value=", value_len); 3961 sppp_print_bytes(value, value_len); 3962 addlog(">\n"); 3963 } 3964 if (value_len != sizeof(sp->myauth.challenge)) { 3965 if (debug) 3966 log(LOG_DEBUG, 3967 SPP_FMT "chap bad hash value length: " 3968 "%d bytes, should be %ld\n", 3969 SPP_ARGS(ifp), value_len, 3970 (long) sizeof(sp->myauth.challenge)); 3971 goto chap_failure; 3972 } 3973 3974 MD5Init(&ctx); 3975 MD5Update(&ctx, &h->ident, 1); 3976 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 3977 MD5Update(&ctx, sp->myauth.challenge, sizeof(sp->myauth.challenge)); 3978 MD5Final(digest, &ctx); 3979 3980 #define FAILMSG "Failed..." 3981 #define SUCCMSG "Welcome!" 3982 3983 if (value_len != sizeof digest || 3984 memcmp(digest, value, value_len) != 0) { 3985 chap_failure: 3986 /* action scn, tld */ 3987 x = splnet(); 3988 sp->pp_auth_failures++; 3989 splx(x); 3990 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 3991 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 3992 0); 3993 chap.tld(sp); 3994 break; 3995 } 3996 sp->pp_auth_failures = 0; 3997 /* action sca, perhaps tlu */ 3998 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 3999 sp->state[IDX_CHAP] == STATE_OPENED) 4000 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 4001 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 4002 0); 4003 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 4004 sppp_cp_change_state(&chap, sp, STATE_OPENED); 4005 chap.tlu(sp); 4006 } 4007 break; 4008 4009 default: 4010 /* Unknown CHAP packet type -- ignore. */ 4011 if (debug) { 4012 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) " 4013 "<0x%x id=0x%xh len=%d", 4014 SPP_ARGS(ifp), 4015 sppp_state_name(sp->state[IDX_CHAP]), 4016 h->type, h->ident, ntohs(h->len)); 4017 if (len > 4) 4018 sppp_print_bytes((u_char *)(h + 1), len - 4); 4019 addlog(">\n"); 4020 } 4021 break; 4022 4023 } 4024 } 4025 4026 static void 4027 sppp_chap_init(struct sppp *sp) 4028 { 4029 /* Chap doesn't have STATE_INITIAL at all. */ 4030 sp->state[IDX_CHAP] = STATE_CLOSED; 4031 sp->fail_counter[IDX_CHAP] = 0; 4032 sp->pp_seq[IDX_CHAP] = 0; 4033 sp->pp_rseq[IDX_CHAP] = 0; 4034 callout_init(&sp->ch[IDX_CHAP]); 4035 } 4036 4037 static void 4038 sppp_chap_open(struct sppp *sp) 4039 { 4040 if (sp->myauth.proto == PPP_CHAP && 4041 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4042 /* we are authenticator for CHAP, start it */ 4043 chap.scr(sp); 4044 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4045 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4046 } 4047 /* nothing to be done if we are peer, await a challenge */ 4048 } 4049 4050 static void 4051 sppp_chap_close(struct sppp *sp) 4052 { 4053 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4054 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4055 } 4056 4057 static void 4058 sppp_chap_TO(void *cookie) 4059 { 4060 struct sppp *sp = (struct sppp *)cookie; 4061 STDDCL; 4062 int s; 4063 4064 s = splnet(); 4065 if (debug) 4066 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n", 4067 SPP_ARGS(ifp), 4068 sppp_state_name(sp->state[IDX_CHAP]), 4069 sp->rst_counter[IDX_CHAP]); 4070 4071 if (--sp->rst_counter[IDX_CHAP] < 0) 4072 /* TO- event */ 4073 switch (sp->state[IDX_CHAP]) { 4074 case STATE_REQ_SENT: 4075 chap.tld(sp); 4076 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4077 break; 4078 } 4079 else 4080 /* TO+ (or TO*) event */ 4081 switch (sp->state[IDX_CHAP]) { 4082 case STATE_OPENED: 4083 /* TO* event */ 4084 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4085 /* fall through */ 4086 case STATE_REQ_SENT: 4087 chap.scr(sp); 4088 /* sppp_cp_change_state() will restart the timer */ 4089 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4090 break; 4091 } 4092 4093 splx(s); 4094 } 4095 4096 static void 4097 sppp_chap_tlu(struct sppp *sp) 4098 { 4099 STDDCL; 4100 int i, x; 4101 4102 i = 0; 4103 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4104 4105 /* 4106 * Some broken CHAP implementations (Conware CoNet, firmware 4107 * 4.0.?) don't want to re-authenticate their CHAP once the 4108 * initial challenge-response exchange has taken place. 4109 * Provide for an option to avoid rechallenges. 4110 */ 4111 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4112 /* 4113 * Compute the re-challenge timeout. This will yield 4114 * a number between 300 and 810 seconds. 4115 */ 4116 i = 300 + ((unsigned)(random() & 0xff00) >> 7); 4117 4118 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4119 } 4120 4121 if (debug) { 4122 log(LOG_DEBUG, 4123 SPP_FMT "chap %s, ", 4124 SPP_ARGS(ifp), 4125 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4126 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4127 addlog("next re-challenge in %d seconds\n", i); 4128 else 4129 addlog("re-challenging supressed\n"); 4130 } 4131 4132 x = splnet(); 4133 sp->pp_auth_failures = 0; 4134 /* indicate to LCP that we need to be closed down */ 4135 sp->lcp.protos |= (1 << IDX_CHAP); 4136 4137 if (sp->pp_flags & PP_NEEDAUTH) { 4138 /* 4139 * Remote is authenticator, but his auth proto didn't 4140 * complete yet. Defer the transition to network 4141 * phase. 4142 */ 4143 splx(x); 4144 return; 4145 } 4146 splx(x); 4147 4148 /* 4149 * If we are already in phase network, we are done here. This 4150 * is the case if this is a dummy tlu event after a re-challenge. 4151 */ 4152 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4153 sppp_phase_network(sp); 4154 } 4155 4156 static void 4157 sppp_chap_tld(struct sppp *sp) 4158 { 4159 STDDCL; 4160 4161 if (debug) 4162 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp)); 4163 callout_stop(&sp->ch[IDX_CHAP]); 4164 sp->lcp.protos &= ~(1 << IDX_CHAP); 4165 4166 lcp.Close(sp); 4167 } 4168 4169 static void 4170 sppp_chap_scr(struct sppp *sp) 4171 { 4172 struct timeval tv; 4173 u_int32_t *ch, seed; 4174 u_char clen; 4175 4176 if (sp->myauth.name == NULL) { 4177 /* can't do anything usefull */ 4178 printf(SPP_FMT "chap starting without my name being set\n", 4179 SPP_ARGS(&sp->pp_if)); 4180 return; 4181 } 4182 4183 /* Compute random challenge. */ 4184 ch = (u_int32_t *)sp->myauth.challenge; 4185 microtime(&tv); 4186 seed = tv.tv_sec ^ tv.tv_usec; 4187 ch[0] = seed ^ random(); 4188 ch[1] = seed ^ random(); 4189 ch[2] = seed ^ random(); 4190 ch[3] = seed ^ random(); 4191 clen = 16; /* 4 * sizeof(u_int32_t) */ 4192 4193 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4194 4195 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4196 sizeof clen, (const char *)&clen, 4197 sizeof(sp->myauth.challenge), sp->myauth.challenge, 4198 sp->myauth.name_len, 4199 sp->myauth.name, 4200 0); 4201 } 4202 4203 /* 4204 *--------------------------------------------------------------------------* 4205 * * 4206 * The PAP implementation. * 4207 * * 4208 *--------------------------------------------------------------------------* 4209 */ 4210 /* 4211 * For PAP, we need to keep a little state also if we are the peer, not the 4212 * authenticator. This is since we don't get a request to authenticate, but 4213 * have to repeatedly authenticate ourself until we got a response (or the 4214 * retry counter is expired). 4215 */ 4216 4217 /* 4218 * Handle incoming PAP packets. */ 4219 static void 4220 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4221 { 4222 STDDCL; 4223 struct lcp_header *h; 4224 int len, x; 4225 u_char mlen; 4226 char *name, *secret; 4227 int name_len, secret_len; 4228 4229 len = m->m_pkthdr.len; 4230 if (len < 5) { 4231 if (debug) 4232 log(LOG_DEBUG, 4233 SPP_FMT "pap invalid packet length: %d bytes\n", 4234 SPP_ARGS(ifp), len); 4235 return; 4236 } 4237 h = mtod(m, struct lcp_header *); 4238 if (len > ntohs(h->len)) 4239 len = ntohs(h->len); 4240 switch (h->type) { 4241 /* PAP request is my authproto */ 4242 case PAP_REQ: 4243 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4244 /* can't do anything usefull */ 4245 printf(SPP_FMT "pap request without his name and his secret being set\n", 4246 SPP_ARGS(ifp)); 4247 break; 4248 } 4249 name = 1 + (u_char *)(h + 1); 4250 name_len = name[-1]; 4251 secret = name + name_len + 1; 4252 if (name_len > len - 6 || 4253 (secret_len = secret[-1]) > len - 6 - name_len) { 4254 if (debug) { 4255 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4256 "<%s id=0x%x len=%d", 4257 SPP_ARGS(ifp), 4258 sppp_auth_type_name(PPP_PAP, h->type), 4259 h->ident, ntohs(h->len)); 4260 if (len > 4) 4261 sppp_print_bytes((u_char *)(h + 1), 4262 len - 4); 4263 addlog(">\n"); 4264 } 4265 break; 4266 } 4267 if (debug) { 4268 log(LOG_DEBUG, SPP_FMT "pap input(%s) " 4269 "<%s id=0x%x len=%d name=", 4270 SPP_ARGS(ifp), 4271 sppp_state_name(sp->state[IDX_PAP]), 4272 sppp_auth_type_name(PPP_PAP, h->type), 4273 h->ident, ntohs(h->len)); 4274 sppp_print_string((char *)name, name_len); 4275 addlog(" secret="); 4276 sppp_print_string((char *)secret, secret_len); 4277 addlog(">\n"); 4278 } 4279 if (name_len != sp->hisauth.name_len || 4280 secret_len != sp->hisauth.secret_len || 4281 memcmp(name, sp->hisauth.name, name_len) != 0 || 4282 memcmp(secret, sp->hisauth.secret, secret_len) != 0) { 4283 /* action scn, tld */ 4284 sp->pp_auth_failures++; 4285 mlen = sizeof(FAILMSG) - 1; 4286 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4287 sizeof mlen, (const char *)&mlen, 4288 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 4289 0); 4290 pap.tld(sp); 4291 break; 4292 } 4293 /* action sca, perhaps tlu */ 4294 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4295 sp->state[IDX_PAP] == STATE_OPENED) { 4296 mlen = sizeof(SUCCMSG) - 1; 4297 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4298 sizeof mlen, (const char *)&mlen, 4299 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 4300 0); 4301 } 4302 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4303 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4304 pap.tlu(sp); 4305 } 4306 break; 4307 4308 /* ack and nak are his authproto */ 4309 case PAP_ACK: 4310 callout_stop(&sp->pap_my_to_ch); 4311 if (debug) { 4312 log(LOG_DEBUG, SPP_FMT "pap success", 4313 SPP_ARGS(ifp)); 4314 name_len = *(char *)h; 4315 if (len > 5 && name_len) { 4316 addlog(": "); 4317 sppp_print_string((char *)(h + 1), name_len); 4318 } 4319 addlog("\n"); 4320 } 4321 x = splnet(); 4322 sp->pp_auth_failures = 0; 4323 sp->pp_flags &= ~PP_NEEDAUTH; 4324 if (sp->myauth.proto == PPP_PAP && 4325 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4326 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4327 /* 4328 * We are authenticator for PAP but didn't 4329 * complete yet. Leave it to tlu to proceed 4330 * to network phase. 4331 */ 4332 splx(x); 4333 break; 4334 } 4335 splx(x); 4336 sppp_phase_network(sp); 4337 break; 4338 4339 case PAP_NAK: 4340 callout_stop(&sp->pap_my_to_ch); 4341 sp->pp_auth_failures++; 4342 if (debug) { 4343 log(LOG_INFO, SPP_FMT "pap failure", 4344 SPP_ARGS(ifp)); 4345 name_len = *(char *)h; 4346 if (len > 5 && name_len) { 4347 addlog(": "); 4348 sppp_print_string((char *)(h + 1), name_len); 4349 } 4350 addlog("\n"); 4351 } else 4352 log(LOG_INFO, SPP_FMT "pap failure\n", 4353 SPP_ARGS(ifp)); 4354 /* await LCP shutdown by authenticator */ 4355 break; 4356 4357 default: 4358 /* Unknown PAP packet type -- ignore. */ 4359 if (debug) { 4360 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4361 "<0x%x id=0x%x len=%d", 4362 SPP_ARGS(ifp), 4363 h->type, h->ident, ntohs(h->len)); 4364 if (len > 4) 4365 sppp_print_bytes((u_char *)(h + 1), len - 4); 4366 addlog(">\n"); 4367 } 4368 break; 4369 4370 } 4371 } 4372 4373 static void 4374 sppp_pap_init(struct sppp *sp) 4375 { 4376 /* PAP doesn't have STATE_INITIAL at all. */ 4377 sp->state[IDX_PAP] = STATE_CLOSED; 4378 sp->fail_counter[IDX_PAP] = 0; 4379 sp->pp_seq[IDX_PAP] = 0; 4380 sp->pp_rseq[IDX_PAP] = 0; 4381 callout_init(&sp->ch[IDX_PAP]); 4382 callout_init(&sp->pap_my_to_ch); 4383 } 4384 4385 static void 4386 sppp_pap_open(struct sppp *sp) 4387 { 4388 if (sp->hisauth.proto == PPP_PAP && 4389 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4390 /* we are authenticator for PAP, start our timer */ 4391 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4392 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4393 } 4394 if (sp->myauth.proto == PPP_PAP) { 4395 /* we are peer, send a request, and start a timer */ 4396 pap.scr(sp); 4397 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4398 sppp_pap_my_TO, sp); 4399 } 4400 } 4401 4402 static void 4403 sppp_pap_close(struct sppp *sp) 4404 { 4405 if (sp->state[IDX_PAP] != STATE_CLOSED) 4406 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4407 } 4408 4409 /* 4410 * That's the timeout routine if we are authenticator. Since the 4411 * authenticator is basically passive in PAP, we can't do much here. 4412 */ 4413 static void 4414 sppp_pap_TO(void *cookie) 4415 { 4416 struct sppp *sp = (struct sppp *)cookie; 4417 STDDCL; 4418 int s; 4419 4420 s = splnet(); 4421 if (debug) 4422 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n", 4423 SPP_ARGS(ifp), 4424 sppp_state_name(sp->state[IDX_PAP]), 4425 sp->rst_counter[IDX_PAP]); 4426 4427 if (--sp->rst_counter[IDX_PAP] < 0) 4428 /* TO- event */ 4429 switch (sp->state[IDX_PAP]) { 4430 case STATE_REQ_SENT: 4431 pap.tld(sp); 4432 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4433 break; 4434 } 4435 else 4436 /* TO+ event, not very much we could do */ 4437 switch (sp->state[IDX_PAP]) { 4438 case STATE_REQ_SENT: 4439 /* sppp_cp_change_state() will restart the timer */ 4440 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4441 break; 4442 } 4443 4444 splx(s); 4445 } 4446 4447 /* 4448 * That's the timeout handler if we are peer. Since the peer is active, 4449 * we need to retransmit our PAP request since it is apparently lost. 4450 * XXX We should impose a max counter. 4451 */ 4452 static void 4453 sppp_pap_my_TO(void *cookie) 4454 { 4455 struct sppp *sp = (struct sppp *)cookie; 4456 STDDCL; 4457 4458 if (debug) 4459 log(LOG_DEBUG, SPP_FMT "pap peer TO\n", 4460 SPP_ARGS(ifp)); 4461 4462 pap.scr(sp); 4463 } 4464 4465 static void 4466 sppp_pap_tlu(struct sppp *sp) 4467 { 4468 STDDCL; 4469 int x; 4470 4471 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4472 4473 if (debug) 4474 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 4475 SPP_ARGS(ifp), pap.name); 4476 4477 x = splnet(); 4478 sp->pp_auth_failures = 0; 4479 /* indicate to LCP that we need to be closed down */ 4480 sp->lcp.protos |= (1 << IDX_PAP); 4481 4482 if (sp->pp_flags & PP_NEEDAUTH) { 4483 /* 4484 * Remote is authenticator, but his auth proto didn't 4485 * complete yet. Defer the transition to network 4486 * phase. 4487 */ 4488 splx(x); 4489 return; 4490 } 4491 splx(x); 4492 sppp_phase_network(sp); 4493 } 4494 4495 static void 4496 sppp_pap_tld(struct sppp *sp) 4497 { 4498 STDDCL; 4499 4500 if (debug) 4501 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp)); 4502 callout_stop(&sp->ch[IDX_PAP]); 4503 callout_stop(&sp->pap_my_to_ch); 4504 sp->lcp.protos &= ~(1 << IDX_PAP); 4505 4506 lcp.Close(sp); 4507 } 4508 4509 static void 4510 sppp_pap_scr(struct sppp *sp) 4511 { 4512 u_char idlen, pwdlen; 4513 4514 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4515 /* can't do anything usefull */ 4516 printf(SPP_FMT "pap starting without my name and secret being set\n", 4517 SPP_ARGS(&sp->pp_if)); 4518 return; 4519 } 4520 4521 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4522 pwdlen = sp->myauth.secret_len; 4523 idlen = sp->myauth.name_len; 4524 4525 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4526 sizeof idlen, (const char *)&idlen, 4527 idlen, sp->myauth.name, 4528 sizeof pwdlen, (const char *)&pwdlen, 4529 pwdlen, sp->myauth.secret, 4530 0); 4531 } 4532 4533 /* 4534 * Random miscellaneous functions. 4535 */ 4536 4537 /* 4538 * Send a PAP or CHAP proto packet. 4539 * 4540 * Varadic function, each of the elements for the ellipsis is of type 4541 * ``size_t mlen, const u_char *msg''. Processing will stop iff 4542 * mlen == 0. 4543 * NOTE: never declare variadic functions with types subject to type 4544 * promotion (i.e. u_char). This is asking for big trouble depending 4545 * on the architecture you are on... 4546 */ 4547 4548 static void 4549 sppp_auth_send(const struct cp *cp, struct sppp *sp, 4550 unsigned int type, unsigned int id, 4551 ...) 4552 { 4553 STDDCL; 4554 struct lcp_header *lh; 4555 struct mbuf *m; 4556 u_char *p; 4557 int len; 4558 size_t pkthdrlen; 4559 unsigned int mlen; 4560 const char *msg; 4561 va_list ap; 4562 4563 MGETHDR(m, M_DONTWAIT, MT_DATA); 4564 if (! m) 4565 return; 4566 m->m_pkthdr.rcvif = 0; 4567 4568 if (sp->pp_flags & PP_NOFRAMING) { 4569 *mtod(m, u_int16_t *) = htons(cp->proto); 4570 pkthdrlen = 2; 4571 lh = (struct lcp_header *)(mtod(m, u_int8_t *)+2); 4572 } else { 4573 struct ppp_header *h; 4574 h = mtod(m, struct ppp_header *); 4575 h->address = PPP_ALLSTATIONS; /* broadcast address */ 4576 h->control = PPP_UI; /* Unnumbered Info */ 4577 h->protocol = htons(cp->proto); 4578 pkthdrlen = PPP_HEADER_LEN; 4579 4580 lh = (struct lcp_header *)(h + 1); 4581 } 4582 4583 lh->type = type; 4584 lh->ident = id; 4585 p = (u_char *)(lh + 1); 4586 4587 va_start(ap, id); 4588 len = 0; 4589 4590 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 4591 msg = va_arg(ap, const char *); 4592 len += mlen; 4593 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 4594 va_end(ap); 4595 m_freem(m); 4596 return; 4597 } 4598 4599 bcopy(msg, p, mlen); 4600 p += mlen; 4601 } 4602 va_end(ap); 4603 4604 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 4605 lh->len = htons(LCP_HEADER_LEN + len); 4606 4607 if (debug) { 4608 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 4609 SPP_ARGS(ifp), cp->name, 4610 sppp_auth_type_name(cp->proto, lh->type), 4611 lh->ident, ntohs(lh->len)); 4612 if (len) 4613 sppp_print_bytes((u_char *)(lh + 1), len); 4614 addlog(">\n"); 4615 } 4616 if (IF_QFULL(&sp->pp_cpq)) { 4617 IF_DROP(&sp->pp_fastq); 4618 IF_DROP(&ifp->if_snd); 4619 m_freem(m); 4620 ++ifp->if_oerrors; 4621 return; 4622 } else 4623 IF_ENQUEUE(&sp->pp_cpq, m); 4624 if (! (ifp->if_flags & IFF_OACTIVE)) 4625 (*ifp->if_start)(ifp); 4626 ifp->if_obytes += m->m_pkthdr.len + 3; 4627 } 4628 4629 /* 4630 * Send keepalive packets, every 10 seconds. 4631 */ 4632 static void 4633 sppp_keepalive(void *dummy) 4634 { 4635 struct sppp *sp; 4636 int s; 4637 time_t now; 4638 4639 s = splnet(); 4640 now = mono_time.tv_sec; 4641 for (sp=spppq; sp; sp=sp->pp_next) { 4642 struct ifnet *ifp = &sp->pp_if; 4643 4644 /* check idle timeout */ 4645 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 4646 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 4647 /* idle timeout is enabled for this interface */ 4648 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 4649 if (ifp->if_flags & IFF_DEBUG) 4650 printf("%s: no activitiy for %lu seconds\n", 4651 sp->pp_if.if_xname, 4652 (unsigned long)(now-sp->pp_last_activity)); 4653 lcp.Close(sp); 4654 continue; 4655 } 4656 } 4657 4658 /* Keepalive mode disabled or channel down? */ 4659 if (! (sp->pp_flags & PP_KEEPALIVE) || 4660 ! (ifp->if_flags & IFF_RUNNING)) 4661 continue; 4662 4663 /* No keepalive in PPP mode if LCP not opened yet. */ 4664 if (! (sp->pp_flags & PP_CISCO) && 4665 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) 4666 continue; 4667 4668 /* No echo reply, but maybe user data passed through? */ 4669 if ((now - sp->pp_last_activity) < LCP_KEEPALIVE_INTERVAL) { 4670 sp->pp_alivecnt = 0; 4671 continue; 4672 } 4673 4674 if (sp->pp_alivecnt == MAXALIVECNT) { 4675 /* No keepalive packets got. Stop the interface. */ 4676 if_down (ifp); 4677 IF_PURGE(&sp->pp_cpq); 4678 if (! (sp->pp_flags & PP_CISCO)) { 4679 printf("%s: LCP keepalive timed out, going to restart the connection\n", 4680 ifp->if_xname); 4681 sp->pp_alivecnt = 0; 4682 4683 /* we are down, close all open protocols */ 4684 lcp.Close(sp); 4685 4686 /* And now prepare LCP to reestablish the link, if configured to do so. */ 4687 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 4688 4689 /* Close connection imediatly, completition of this 4690 * will summon the magic needed to reestablish it. */ 4691 sp->pp_tlf(sp); 4692 continue; 4693 } 4694 } 4695 if (sp->pp_alivecnt <= MAXALIVECNT) 4696 ++sp->pp_alivecnt; 4697 if (sp->pp_flags & PP_CISCO) 4698 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, 4699 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 4700 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 4701 int32_t nmagic = htonl(sp->lcp.magic); 4702 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 4703 sppp_cp_send(sp, PPP_LCP, ECHO_REQ, 4704 sp->lcp.echoid, 4, &nmagic); 4705 } 4706 } 4707 splx(s); 4708 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 4709 } 4710 4711 /* 4712 * Get both IP addresses. 4713 */ 4714 static void 4715 sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, u_int32_t *srcmask) 4716 { 4717 struct ifnet *ifp = &sp->pp_if; 4718 struct ifaddr *ifa; 4719 struct sockaddr_in *si, *sm; 4720 u_int32_t ssrc, ddst; 4721 4722 sm = NULL; 4723 ssrc = ddst = 0; 4724 /* 4725 * Pick the first AF_INET address from the list, 4726 * aliases don't make any sense on a p2p link anyway. 4727 */ 4728 si = 0; 4729 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 4730 if (ifa->ifa_addr->sa_family == AF_INET) { 4731 si = (struct sockaddr_in *)ifa->ifa_addr; 4732 sm = (struct sockaddr_in *)ifa->ifa_netmask; 4733 if (si) 4734 break; 4735 } 4736 } 4737 if (ifa) { 4738 if (si && si->sin_addr.s_addr) { 4739 ssrc = si->sin_addr.s_addr; 4740 if (srcmask) 4741 *srcmask = ntohl(sm->sin_addr.s_addr); 4742 } 4743 4744 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 4745 if (si && si->sin_addr.s_addr) 4746 ddst = si->sin_addr.s_addr; 4747 } 4748 4749 if (dst) *dst = ntohl(ddst); 4750 if (src) *src = ntohl(ssrc); 4751 } 4752 4753 /* 4754 * Set IP addresses. Must be called at splnet. 4755 * If an address is 0, leave it the way it is. 4756 */ 4757 static void 4758 sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr) 4759 { 4760 STDDCL; 4761 struct ifaddr *ifa; 4762 struct sockaddr_in *si; 4763 struct sockaddr_in *dest; 4764 4765 /* 4766 * Pick the first AF_INET address from the list, 4767 * aliases don't make any sense on a p2p link anyway. 4768 */ 4769 4770 si = 0; 4771 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4772 { 4773 if (ifa->ifa_addr->sa_family == AF_INET) 4774 { 4775 si = (struct sockaddr_in *)ifa->ifa_addr; 4776 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4777 if (si) 4778 break; 4779 } 4780 } 4781 4782 if (ifa && si) 4783 { 4784 int error; 4785 struct sockaddr_in new_sin = *si; 4786 struct sockaddr_in new_dst = *dest; 4787 4788 /* 4789 * Scrub old routes now instead of calling in_ifinit with 4790 * scrub=1, because we may change the dstaddr 4791 * before the call to in_ifinit. 4792 */ 4793 in_ifscrub(ifp, ifatoia(ifa)); 4794 4795 if (myaddr != 0) 4796 new_sin.sin_addr.s_addr = htonl(myaddr); 4797 if (hisaddr != 0) { 4798 new_dst.sin_addr.s_addr = htonl(hisaddr); 4799 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) { 4800 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 4801 *dest = new_dst; /* fix dstaddr in place */ 4802 } 4803 } 4804 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4805 if(debug && error) 4806 { 4807 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addrs: in_ifinit " 4808 " failed, error=%d\n", SPP_ARGS(ifp), error); 4809 } 4810 } 4811 } 4812 4813 /* 4814 * Clear IP addresses. Must be called at splnet. 4815 */ 4816 static void 4817 sppp_clear_ip_addrs(struct sppp *sp) 4818 { 4819 struct ifnet *ifp = &sp->pp_if; 4820 struct ifaddr *ifa; 4821 struct sockaddr_in *si; 4822 struct sockaddr_in *dest; 4823 4824 u_int32_t remote; 4825 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4826 remote = sp->ipcp.saved_hisaddr; 4827 else 4828 sppp_get_ip_addrs(sp, 0, &remote, 0); 4829 4830 /* 4831 * Pick the first AF_INET address from the list, 4832 * aliases don't make any sense on a p2p link anyway. 4833 */ 4834 4835 si = 0; 4836 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4837 { 4838 if (ifa->ifa_addr->sa_family == AF_INET) 4839 { 4840 si = (struct sockaddr_in *)ifa->ifa_addr; 4841 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4842 if (si) 4843 break; 4844 } 4845 } 4846 4847 if (ifa && si) 4848 { 4849 struct sockaddr_in new_sin = *si; 4850 4851 in_ifscrub(ifp, ifatoia(ifa)); 4852 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 4853 new_sin.sin_addr.s_addr = 0; 4854 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4855 /* replace peer addr in place */ 4856 dest->sin_addr.s_addr = sp->ipcp.saved_hisaddr; 4857 in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4858 } 4859 } 4860 4861 #ifdef INET6 4862 /* 4863 * Get both IPv6 addresses. 4864 */ 4865 static void 4866 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 4867 struct in6_addr *srcmask) 4868 { 4869 struct ifnet *ifp = &sp->pp_if; 4870 struct ifaddr *ifa; 4871 struct sockaddr_in6 *si, *sm; 4872 struct in6_addr ssrc, ddst; 4873 4874 sm = NULL; 4875 memset(&ssrc, 0, sizeof(ssrc)); 4876 memset(&ddst, 0, sizeof(ddst)); 4877 /* 4878 * Pick the first link-local AF_INET6 address from the list, 4879 * aliases don't make any sense on a p2p link anyway. 4880 */ 4881 si = 0; 4882 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4883 if (ifa->ifa_addr->sa_family == AF_INET6) { 4884 si = (struct sockaddr_in6 *)ifa->ifa_addr; 4885 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 4886 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 4887 break; 4888 } 4889 if (ifa) { 4890 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 4891 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc)); 4892 if (srcmask) { 4893 bcopy(&sm->sin6_addr, srcmask, 4894 sizeof(*srcmask)); 4895 } 4896 } 4897 4898 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 4899 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 4900 bcopy(&si->sin6_addr, &ddst, sizeof(ddst)); 4901 } 4902 4903 if (dst) 4904 bcopy(&ddst, dst, sizeof(*dst)); 4905 if (src) 4906 bcopy(&ssrc, src, sizeof(*src)); 4907 } 4908 4909 #ifdef IPV6CP_MYIFID_DYN 4910 /* 4911 * Generate random ifid. 4912 */ 4913 static void 4914 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 4915 { 4916 /* TBD */ 4917 } 4918 4919 /* 4920 * Set my IPv6 address. Must be called at splnet. 4921 */ 4922 static void 4923 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 4924 { 4925 STDDCL; 4926 struct ifaddr *ifa; 4927 struct sockaddr_in6 *sin6; 4928 4929 /* 4930 * Pick the first link-local AF_INET6 address from the list, 4931 * aliases don't make any sense on a p2p link anyway. 4932 */ 4933 4934 sin6 = NULL; 4935 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4936 { 4937 if (ifa->ifa_addr->sa_family == AF_INET6) 4938 { 4939 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 4940 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 4941 break; 4942 } 4943 } 4944 4945 if (ifa && sin6) 4946 { 4947 int error; 4948 struct sockaddr_in6 new_sin6 = *sin6; 4949 4950 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr)); 4951 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 4952 if (debug && error) 4953 { 4954 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit " 4955 " failed, error=%d\n", SPP_ARGS(ifp), error); 4956 } 4957 } 4958 } 4959 #endif 4960 4961 /* 4962 * Suggest a candidate address to be used by peer. 4963 */ 4964 static void 4965 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 4966 { 4967 struct in6_addr myaddr; 4968 struct timeval tv; 4969 4970 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4971 4972 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 4973 microtime(&tv); 4974 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 4975 myaddr.s6_addr[14] ^= 0xff; 4976 myaddr.s6_addr[15] ^= 0xff; 4977 } else { 4978 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 4979 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 4980 } 4981 if (suggest) 4982 bcopy(&myaddr, suggest, sizeof(myaddr)); 4983 } 4984 #endif /*INET6*/ 4985 4986 /* 4987 * Process ioctl requests specific to the PPP interface. 4988 * Permissions have already been checked. 4989 */ 4990 static int 4991 sppp_params(struct sppp *sp, int cmd, void *data) 4992 { 4993 switch (cmd) { 4994 case SPPPGETAUTHCFG: 4995 { 4996 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 4997 int error; 4998 size_t len; 4999 5000 cfg->myauthflags = sp->myauth.flags; 5001 cfg->hisauthflags = sp->hisauth.flags; 5002 strncpy(cfg->ifname, sp->pp_if.if_xname, IFNAMSIZ); 5003 cfg->hisauth = 0; 5004 if (sp->hisauth.proto) 5005 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5006 cfg->myauth = 0; 5007 if (sp->myauth.proto) 5008 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5009 if (cfg->myname_length == 0) { 5010 if (sp->myauth.name != NULL) 5011 cfg->myname_length = sp->myauth.name_len + 1; 5012 } else { 5013 if (sp->myauth.name == NULL) { 5014 cfg->myname_length = 0; 5015 } else { 5016 len = sp->myauth.name_len + 1; 5017 if (cfg->myname_length < len) 5018 return (ENAMETOOLONG); 5019 error = copyout(sp->myauth.name, cfg->myname, len); 5020 if (error) return error; 5021 } 5022 } 5023 if (cfg->hisname_length == 0) { 5024 if(sp->hisauth.name != NULL) 5025 cfg->hisname_length = sp->hisauth.name_len + 1; 5026 } else { 5027 if (sp->hisauth.name == NULL) { 5028 cfg->hisname_length = 0; 5029 } else { 5030 len = sp->hisauth.name_len + 1; 5031 if (cfg->hisname_length < len) 5032 return (ENAMETOOLONG); 5033 error = copyout(sp->hisauth.name, cfg->hisname, len); 5034 if (error) return error; 5035 } 5036 } 5037 } 5038 break; 5039 case SPPPSETAUTHCFG: 5040 { 5041 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5042 int error; 5043 5044 if (sp->myauth.name) { 5045 free(sp->myauth.name, M_DEVBUF); 5046 sp->myauth.name = NULL; 5047 } 5048 if (sp->myauth.secret) { 5049 free(sp->myauth.secret, M_DEVBUF); 5050 sp->myauth.secret = NULL; 5051 } 5052 if (sp->hisauth.name) { 5053 free(sp->hisauth.name, M_DEVBUF); 5054 sp->hisauth.name = NULL; 5055 } 5056 if (sp->hisauth.secret) { 5057 free(sp->hisauth.secret, M_DEVBUF); 5058 sp->hisauth.secret = NULL; 5059 } 5060 5061 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5062 if (cfg->hisname_length >= MCLBYTES) 5063 return (ENAMETOOLONG); 5064 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5065 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5066 if (error) { 5067 free(sp->hisauth.name, M_DEVBUF); 5068 sp->hisauth.name = NULL; 5069 return error; 5070 } 5071 sp->hisauth.name_len = cfg->hisname_length - 1; 5072 sp->hisauth.name[sp->hisauth.name_len] = 0; 5073 } 5074 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5075 if (cfg->hissecret_length >= MCLBYTES) 5076 return (ENAMETOOLONG); 5077 sp->hisauth.secret = malloc(cfg->hissecret_length, M_DEVBUF, M_WAITOK); 5078 error = copyin(cfg->hissecret, sp->hisauth.secret, cfg->hissecret_length); 5079 if (error) { 5080 free(sp->hisauth.secret, M_DEVBUF); 5081 sp->hisauth.secret = NULL; 5082 return error; 5083 } 5084 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5085 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5086 } 5087 if (cfg->myname != NULL && cfg->myname_length > 0) { 5088 if (cfg->myname_length >= MCLBYTES) 5089 return (ENAMETOOLONG); 5090 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5091 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5092 if (error) { 5093 free(sp->myauth.name, M_DEVBUF); 5094 sp->myauth.name = NULL; 5095 return error; 5096 } 5097 sp->myauth.name_len = cfg->myname_length - 1; 5098 sp->myauth.name[sp->myauth.name_len] = 0; 5099 } 5100 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5101 if (cfg->mysecret_length >= MCLBYTES) 5102 return (ENAMETOOLONG); 5103 sp->myauth.secret = malloc(cfg->mysecret_length, M_DEVBUF, M_WAITOK); 5104 error = copyin(cfg->mysecret, sp->myauth.secret, cfg->mysecret_length); 5105 if (error) { 5106 free(sp->myauth.secret, M_DEVBUF); 5107 sp->myauth.secret = NULL; 5108 return error; 5109 } 5110 sp->myauth.secret_len = cfg->mysecret_length - 1; 5111 sp->myauth.secret[sp->myauth.secret_len] = 0; 5112 } 5113 sp->myauth.flags = cfg->myauthflags; 5114 if (cfg->myauth) 5115 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5116 sp->hisauth.flags = cfg->hisauthflags; 5117 if (cfg->hisauth) 5118 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5119 sp->pp_auth_failures = 0; 5120 if (sp->hisauth.proto != 0) 5121 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 5122 else 5123 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 5124 } 5125 break; 5126 case SPPPGETLCPCFG: 5127 { 5128 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5129 lcp->lcp_timeout = sp->lcp.timeout; 5130 } 5131 break; 5132 case SPPPSETLCPCFG: 5133 { 5134 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5135 sp->lcp.timeout = lcp->lcp_timeout; 5136 } 5137 break; 5138 case SPPPGETSTATUS: 5139 { 5140 struct spppstatus *status = (struct spppstatus *)data; 5141 status->phase = sp->pp_phase; 5142 } 5143 break; 5144 case SPPPGETIDLETO: 5145 { 5146 struct spppidletimeout *to = (struct spppidletimeout *)data; 5147 to->idle_seconds = sp->pp_idle_timeout; 5148 } 5149 break; 5150 case SPPPSETIDLETO: 5151 { 5152 struct spppidletimeout *to = (struct spppidletimeout *)data; 5153 sp->pp_idle_timeout = to->idle_seconds; 5154 } 5155 break; 5156 case SPPPSETAUTHFAILURE: 5157 { 5158 struct spppauthfailuresettings *afsettings = (struct spppauthfailuresettings *)data; 5159 sp->pp_max_auth_fail = afsettings->max_failures; 5160 sp->pp_auth_failures = 0; 5161 } 5162 break; 5163 case SPPPGETAUTHFAILURES: 5164 { 5165 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5166 stats->auth_failures = sp->pp_auth_failures; 5167 stats->max_failures = sp->pp_max_auth_fail; 5168 } 5169 break; 5170 case SPPPSETDNSOPTS: 5171 { 5172 struct spppdnssettings *req = (struct spppdnssettings *)data; 5173 sp->query_dns = req->query_dns & 3; 5174 } 5175 break; 5176 case SPPPGETDNSOPTS: 5177 { 5178 struct spppdnssettings *req = (struct spppdnssettings *)data; 5179 req->query_dns = sp->query_dns; 5180 } 5181 break; 5182 case SPPPGETDNSADDRS: 5183 { 5184 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; 5185 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5186 } 5187 break; 5188 default: 5189 return (EINVAL); 5190 } 5191 5192 return (0); 5193 } 5194 5195 static void 5196 sppp_phase_network(struct sppp *sp) 5197 { 5198 STDDCL; 5199 int i; 5200 u_int32_t mask; 5201 5202 sp->pp_phase = SPPP_PHASE_NETWORK; 5203 5204 if(debug) 5205 { 5206 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 5207 sppp_phase_name(sp->pp_phase)); 5208 } 5209 5210 /* Notify NCPs now. */ 5211 for (i = 0; i < IDX_COUNT; i++) 5212 if ((cps[i])->flags & CP_NCP) 5213 (cps[i])->Open(sp); 5214 5215 /* Send Up events to all NCPs. */ 5216 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5217 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) 5218 (cps[i])->Up(sp); 5219 5220 /* if no NCP is starting, all this was in vain, close down */ 5221 sppp_lcp_check_and_close(sp); 5222 } 5223 5224 5225 static const char * 5226 sppp_cp_type_name(u_char type) 5227 { 5228 static char buf[12]; 5229 switch (type) { 5230 case CONF_REQ: return "conf-req"; 5231 case CONF_ACK: return "conf-ack"; 5232 case CONF_NAK: return "conf-nak"; 5233 case CONF_REJ: return "conf-rej"; 5234 case TERM_REQ: return "term-req"; 5235 case TERM_ACK: return "term-ack"; 5236 case CODE_REJ: return "code-rej"; 5237 case PROTO_REJ: return "proto-rej"; 5238 case ECHO_REQ: return "echo-req"; 5239 case ECHO_REPLY: return "echo-reply"; 5240 case DISC_REQ: return "discard-req"; 5241 } 5242 sprintf (buf, "0x%x", type); 5243 return buf; 5244 } 5245 5246 static const char * 5247 sppp_auth_type_name(u_short proto, u_char type) 5248 { 5249 static char buf[12]; 5250 switch (proto) { 5251 case PPP_CHAP: 5252 switch (type) { 5253 case CHAP_CHALLENGE: return "challenge"; 5254 case CHAP_RESPONSE: return "response"; 5255 case CHAP_SUCCESS: return "success"; 5256 case CHAP_FAILURE: return "failure"; 5257 } 5258 case PPP_PAP: 5259 switch (type) { 5260 case PAP_REQ: return "req"; 5261 case PAP_ACK: return "ack"; 5262 case PAP_NAK: return "nak"; 5263 } 5264 } 5265 sprintf (buf, "0x%x", type); 5266 return buf; 5267 } 5268 5269 static const char * 5270 sppp_lcp_opt_name(u_char opt) 5271 { 5272 static char buf[12]; 5273 switch (opt) { 5274 case LCP_OPT_MRU: return "mru"; 5275 case LCP_OPT_ASYNC_MAP: return "async-map"; 5276 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 5277 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 5278 case LCP_OPT_MAGIC: return "magic"; 5279 case LCP_OPT_PROTO_COMP: return "proto-comp"; 5280 case LCP_OPT_ADDR_COMP: return "addr-comp"; 5281 } 5282 sprintf (buf, "0x%x", opt); 5283 return buf; 5284 } 5285 5286 static const char * 5287 sppp_ipcp_opt_name(u_char opt) 5288 { 5289 static char buf[12]; 5290 switch (opt) { 5291 case IPCP_OPT_ADDRESSES: return "addresses"; 5292 case IPCP_OPT_COMPRESSION: return "compression"; 5293 case IPCP_OPT_ADDRESS: return "address"; 5294 } 5295 sprintf (buf, "0x%x", opt); 5296 return buf; 5297 } 5298 5299 #ifdef INET6 5300 static const char * 5301 sppp_ipv6cp_opt_name(u_char opt) 5302 { 5303 static char buf[12]; 5304 switch (opt) { 5305 case IPV6CP_OPT_IFID: return "ifid"; 5306 case IPV6CP_OPT_COMPRESSION: return "compression"; 5307 } 5308 sprintf (buf, "0x%x", opt); 5309 return buf; 5310 } 5311 #endif 5312 5313 static const char * 5314 sppp_state_name(int state) 5315 { 5316 switch (state) { 5317 case STATE_INITIAL: return "initial"; 5318 case STATE_STARTING: return "starting"; 5319 case STATE_CLOSED: return "closed"; 5320 case STATE_STOPPED: return "stopped"; 5321 case STATE_CLOSING: return "closing"; 5322 case STATE_STOPPING: return "stopping"; 5323 case STATE_REQ_SENT: return "req-sent"; 5324 case STATE_ACK_RCVD: return "ack-rcvd"; 5325 case STATE_ACK_SENT: return "ack-sent"; 5326 case STATE_OPENED: return "opened"; 5327 } 5328 return "illegal"; 5329 } 5330 5331 static const char * 5332 sppp_phase_name(int phase) 5333 { 5334 switch (phase) { 5335 case SPPP_PHASE_DEAD: return "dead"; 5336 case SPPP_PHASE_ESTABLISH: return "establish"; 5337 case SPPP_PHASE_TERMINATE: return "terminate"; 5338 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 5339 case SPPP_PHASE_NETWORK: return "network"; 5340 } 5341 return "illegal"; 5342 } 5343 5344 static const char * 5345 sppp_proto_name(u_short proto) 5346 { 5347 static char buf[12]; 5348 switch (proto) { 5349 case PPP_LCP: return "lcp"; 5350 case PPP_IPCP: return "ipcp"; 5351 case PPP_PAP: return "pap"; 5352 case PPP_CHAP: return "chap"; 5353 case PPP_IPV6CP: return "ipv6cp"; 5354 } 5355 sprintf(buf, "0x%x", (unsigned)proto); 5356 return buf; 5357 } 5358 5359 static void 5360 sppp_print_bytes(const u_char *p, u_short len) 5361 { 5362 addlog(" %02x", *p++); 5363 while (--len > 0) 5364 addlog("-%02x", *p++); 5365 } 5366 5367 static void 5368 sppp_print_string(const char *p, u_short len) 5369 { 5370 u_char c; 5371 5372 while (len-- > 0) { 5373 c = *p++; 5374 /* 5375 * Print only ASCII chars directly. RFC 1994 recommends 5376 * using only them, but we don't rely on it. */ 5377 if (c < ' ' || c > '~') 5378 addlog("\\x%x", c); 5379 else 5380 addlog("%c", c); 5381 } 5382 } 5383 5384 static const char * 5385 sppp_dotted_quad(u_int32_t addr) 5386 { 5387 static char s[16]; 5388 sprintf(s, "%d.%d.%d.%d", 5389 (int)((addr >> 24) & 0xff), 5390 (int)((addr >> 16) & 0xff), 5391 (int)((addr >> 8) & 0xff), 5392 (int)(addr & 0xff)); 5393 return s; 5394 } 5395 5396 /* a dummy, used to drop uninteresting events */ 5397 static void 5398 sppp_null(struct sppp *unused) 5399 { 5400 /* do just nothing */ 5401 } 5402 /* 5403 * This file is large. Tell emacs to highlight it nevertheless. 5404 * 5405 * Local Variables: 5406 * hilit-auto-highlight-maxout: 120000 5407 * End: 5408 */ 5409
Indexes created Tue Oct 14 06:10:07 GMT 2025