if_spppsubr.c revision 1.59
1 /* $NetBSD: if_spppsubr.c,v 1.59 2002/09/25 07:24:06 itojun 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 1.59 2002/09/25 07:24:06 itojun Exp $"); 32 33 #include "opt_inet.h" 34 #include "opt_ipx.h" 35 #include "opt_iso.h" 36 #include "opt_ns.h" 37 38 #include <sys/param.h> 39 #include <sys/proc.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/sockio.h> 43 #include <sys/socket.h> 44 #include <sys/syslog.h> 45 #include <sys/malloc.h> 46 #include <sys/mbuf.h> 47 #include <sys/callout.h> 48 #include <sys/md5.h> 49 50 #include <net/if.h> 51 #include <net/netisr.h> 52 #include <net/if_types.h> 53 #include <net/route.h> 54 #include <net/ppp_defs.h> 55 56 #include <machine/stdarg.h> 57 58 #include <netinet/in.h> 59 #include <netinet/in_systm.h> 60 #include <netinet/in_var.h> 61 #ifdef INET 62 #include <netinet/ip.h> 63 #include <netinet/tcp.h> 64 #endif 65 #include <net/ethertypes.h> 66 67 #ifdef IPX 68 #include <netipx/ipx.h> 69 #include <netipx/ipx_if.h> 70 #endif 71 72 #ifdef NS 73 #include <netns/ns.h> 74 #include <netns/ns_if.h> 75 #endif 76 77 #ifdef ISO 78 #include <netiso/argo_debug.h> 79 #include <netiso/iso.h> 80 #include <netiso/iso_var.h> 81 #include <netiso/iso_snpac.h> 82 #endif 83 84 #include <net/if_sppp.h> 85 #include <net/if_spppvar.h> 86 87 #define LCP_KEEPALIVE_INTERVAL 10 /* seconds */ 88 #define MAXALIVECNT 3 /* max. missed alive packets */ 89 #define DEFAULT_MAX_AUTH_FAILURES 5 /* max. auth. failures */ 90 91 /* 92 * Interface flags that can be set in an ifconfig command. 93 * 94 * Setting link0 will make the link passive, i.e. it will be marked 95 * as being administrative openable, but won't be opened to begin 96 * with. Incoming calls will be answered, or subsequent calls with 97 * -link1 will cause the administrative open of the LCP layer. 98 * 99 * Setting link1 will cause the link to auto-dial only as packets 100 * arrive to be sent. 101 * 102 * Setting IFF_DEBUG will syslog the option negotiation and state 103 * transitions at level kern.debug. Note: all logs consistently look 104 * like 105 * 106 * <if-name><unit>: <proto-name> <additional info...> 107 * 108 * with <if-name><unit> being something like "bppp0", and <proto-name> 109 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. 110 */ 111 112 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 113 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 114 115 #define CONF_REQ 1 /* PPP configure request */ 116 #define CONF_ACK 2 /* PPP configure acknowledge */ 117 #define CONF_NAK 3 /* PPP configure negative ack */ 118 #define CONF_REJ 4 /* PPP configure reject */ 119 #define TERM_REQ 5 /* PPP terminate request */ 120 #define TERM_ACK 6 /* PPP terminate acknowledge */ 121 #define CODE_REJ 7 /* PPP code reject */ 122 #define PROTO_REJ 8 /* PPP protocol reject */ 123 #define ECHO_REQ 9 /* PPP echo request */ 124 #define ECHO_REPLY 10 /* PPP echo reply */ 125 #define DISC_REQ 11 /* PPP discard request */ 126 127 #define LCP_OPT_MRU 1 /* maximum receive unit */ 128 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 129 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 130 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 131 #define LCP_OPT_MAGIC 5 /* magic number */ 132 #define LCP_OPT_RESERVED 6 /* reserved */ 133 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 134 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 135 136 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 137 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol */ 138 #define IPCP_OPT_ADDRESS 3 /* local IP address */ 139 #define IPCP_OPT_PRIMDNS 129 /* primary remote dns address */ 140 #define IPCP_OPT_SECDNS 131 /* secondary remote dns address */ 141 142 #define IPV6CP_OPT_IFID 1 /* interface identifier */ 143 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 144 145 #define PAP_REQ 1 /* PAP name/password request */ 146 #define PAP_ACK 2 /* PAP acknowledge */ 147 #define PAP_NAK 3 /* PAP fail */ 148 149 #define CHAP_CHALLENGE 1 /* CHAP challenge request */ 150 #define CHAP_RESPONSE 2 /* CHAP challenge response */ 151 #define CHAP_SUCCESS 3 /* CHAP response ok */ 152 #define CHAP_FAILURE 4 /* CHAP response failed */ 153 154 #define CHAP_MD5 5 /* hash algorithm - MD5 */ 155 156 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 157 #define CISCO_UNICAST 0x0f /* Cisco unicast address */ 158 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 159 #define CISCO_ADDR_REQ 0 /* Cisco address request */ 160 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 161 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 162 163 /* states are named and numbered according to RFC 1661 */ 164 #define STATE_INITIAL 0 165 #define STATE_STARTING 1 166 #define STATE_CLOSED 2 167 #define STATE_STOPPED 3 168 #define STATE_CLOSING 4 169 #define STATE_STOPPING 5 170 #define STATE_REQ_SENT 6 171 #define STATE_ACK_RCVD 7 172 #define STATE_ACK_SENT 8 173 #define STATE_OPENED 9 174 175 struct ppp_header { 176 u_char address; 177 u_char control; 178 u_short protocol; 179 } __attribute__((__packed__)); 180 #define PPP_HEADER_LEN sizeof (struct ppp_header) 181 182 struct lcp_header { 183 u_char type; 184 u_char ident; 185 u_short len; 186 } __attribute__((__packed__)); 187 #define LCP_HEADER_LEN sizeof (struct lcp_header) 188 189 struct cisco_packet { 190 u_int32_t type; 191 u_int32_t par1; 192 u_int32_t par2; 193 u_short rel; 194 u_short time0; 195 u_short time1; 196 } __attribute__((__packed__)); 197 #define CISCO_PACKET_LEN 18 198 199 /* 200 * We follow the spelling and capitalization of RFC 1661 here, to make 201 * it easier comparing with the standard. Please refer to this RFC in 202 * case you can't make sense out of these abbreviation; it will also 203 * explain the semantics related to the various events and actions. 204 */ 205 struct cp { 206 u_short proto; /* PPP control protocol number */ 207 u_char protoidx; /* index into state table in struct sppp */ 208 u_char flags; 209 #define CP_LCP 0x01 /* this is the LCP */ 210 #define CP_AUTH 0x02 /* this is an authentication protocol */ 211 #define CP_NCP 0x04 /* this is a NCP */ 212 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 213 const char *name; /* name of this control protocol */ 214 /* event handlers */ 215 void (*Up)(struct sppp *sp); 216 void (*Down)(struct sppp *sp); 217 void (*Open)(struct sppp *sp); 218 void (*Close)(struct sppp *sp); 219 void (*TO)(void *sp); 220 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len); 221 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len); 222 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len); 223 /* actions */ 224 void (*tlu)(struct sppp *sp); 225 void (*tld)(struct sppp *sp); 226 void (*tls)(struct sppp *sp); 227 void (*tlf)(struct sppp *sp); 228 void (*scr)(struct sppp *sp); 229 }; 230 231 static struct sppp *spppq; 232 static struct callout keepalive_ch; 233 234 #ifdef __FreeBSD__ 235 #define SPP_FMT "%s%d: " 236 #define SPP_ARGS(ifp) (ifp)->if_name, (ifp)->if_unit 237 #else 238 #define SPP_FMT "%s: " 239 #define SPP_ARGS(ifp) (ifp)->if_xname 240 #endif 241 242 #ifdef INET 243 /* 244 * The following disgusting hack gets around the problem that IP TOS 245 * can't be set yet. We want to put "interactive" traffic on a high 246 * priority queue. To decide if traffic is interactive, we check that 247 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 248 * 249 * XXX is this really still necessary? - joerg - 250 */ 251 static u_short interactive_ports[8] = { 252 0, 513, 0, 0, 253 0, 21, 0, 23, 254 }; 255 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 256 #endif 257 258 /* almost every function needs these */ 259 #define STDDCL \ 260 struct ifnet *ifp = &sp->pp_if; \ 261 int debug = ifp->if_flags & IFF_DEBUG 262 263 static int sppp_output(struct ifnet *ifp, struct mbuf *m, 264 struct sockaddr *dst, struct rtentry *rt); 265 266 static void sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2); 267 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m); 268 269 static void sppp_cp_input(const struct cp *cp, struct sppp *sp, 270 struct mbuf *m); 271 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 272 u_char ident, u_short len, void *data); 273 /* static void sppp_cp_timeout(void *arg); */ 274 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp, 275 int newstate); 276 static void sppp_auth_send(const struct cp *cp, 277 struct sppp *sp, unsigned int type, unsigned int id, 278 ...); 279 280 static void sppp_up_event(const struct cp *cp, struct sppp *sp); 281 static void sppp_down_event(const struct cp *cp, struct sppp *sp); 282 static void sppp_open_event(const struct cp *cp, struct sppp *sp); 283 static void sppp_close_event(const struct cp *cp, struct sppp *sp); 284 static void sppp_to_event(const struct cp *cp, struct sppp *sp); 285 286 static void sppp_null(struct sppp *sp); 287 288 static void sppp_lcp_init(struct sppp *sp); 289 static void sppp_lcp_up(struct sppp *sp); 290 static void sppp_lcp_down(struct sppp *sp); 291 static void sppp_lcp_open(struct sppp *sp); 292 static void sppp_lcp_close(struct sppp *sp); 293 static void sppp_lcp_TO(void *sp); 294 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 295 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 296 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 297 static void sppp_lcp_tlu(struct sppp *sp); 298 static void sppp_lcp_tld(struct sppp *sp); 299 static void sppp_lcp_tls(struct sppp *sp); 300 static void sppp_lcp_tlf(struct sppp *sp); 301 static void sppp_lcp_scr(struct sppp *sp); 302 static void sppp_lcp_check_and_close(struct sppp *sp); 303 static int sppp_ncp_check(struct sppp *sp); 304 305 static void sppp_ipcp_init(struct sppp *sp); 306 static void sppp_ipcp_up(struct sppp *sp); 307 static void sppp_ipcp_down(struct sppp *sp); 308 static void sppp_ipcp_open(struct sppp *sp); 309 static void sppp_ipcp_close(struct sppp *sp); 310 static void sppp_ipcp_TO(void *sp); 311 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 312 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 313 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 314 static void sppp_ipcp_tlu(struct sppp *sp); 315 static void sppp_ipcp_tld(struct sppp *sp); 316 static void sppp_ipcp_tls(struct sppp *sp); 317 static void sppp_ipcp_tlf(struct sppp *sp); 318 static void sppp_ipcp_scr(struct sppp *sp); 319 320 static void sppp_ipv6cp_init(struct sppp *sp); 321 static void sppp_ipv6cp_up(struct sppp *sp); 322 static void sppp_ipv6cp_down(struct sppp *sp); 323 static void sppp_ipv6cp_open(struct sppp *sp); 324 static void sppp_ipv6cp_close(struct sppp *sp); 325 static void sppp_ipv6cp_TO(void *sp); 326 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len); 327 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 328 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 329 static void sppp_ipv6cp_tlu(struct sppp *sp); 330 static void sppp_ipv6cp_tld(struct sppp *sp); 331 static void sppp_ipv6cp_tls(struct sppp *sp); 332 static void sppp_ipv6cp_tlf(struct sppp *sp); 333 static void sppp_ipv6cp_scr(struct sppp *sp); 334 335 static void sppp_pap_input(struct sppp *sp, struct mbuf *m); 336 static void sppp_pap_init(struct sppp *sp); 337 static void sppp_pap_open(struct sppp *sp); 338 static void sppp_pap_close(struct sppp *sp); 339 static void sppp_pap_TO(void *sp); 340 static void sppp_pap_my_TO(void *sp); 341 static void sppp_pap_tlu(struct sppp *sp); 342 static void sppp_pap_tld(struct sppp *sp); 343 static void sppp_pap_scr(struct sppp *sp); 344 345 static void sppp_chap_input(struct sppp *sp, struct mbuf *m); 346 static void sppp_chap_init(struct sppp *sp); 347 static void sppp_chap_open(struct sppp *sp); 348 static void sppp_chap_close(struct sppp *sp); 349 static void sppp_chap_TO(void *sp); 350 static void sppp_chap_tlu(struct sppp *sp); 351 static void sppp_chap_tld(struct sppp *sp); 352 static void sppp_chap_scr(struct sppp *sp); 353 354 static const char *sppp_auth_type_name(u_short proto, u_char type); 355 static const char *sppp_cp_type_name(u_char type); 356 static const char *sppp_dotted_quad(u_int32_t addr); 357 static const char *sppp_ipcp_opt_name(u_char opt); 358 #ifdef INET6 359 static const char *sppp_ipv6cp_opt_name(u_char opt); 360 #endif 361 static const char *sppp_lcp_opt_name(u_char opt); 362 static const char *sppp_phase_name(int phase); 363 static const char *sppp_proto_name(u_short proto); 364 static const char *sppp_state_name(int state); 365 static int sppp_params(struct sppp *sp, int cmd, void *data); 366 static void sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, 367 u_int32_t *srcmask); 368 static void sppp_keepalive(void *dummy); 369 static void sppp_phase_network(struct sppp *sp); 370 static void sppp_print_bytes(const u_char *p, u_short len); 371 static void sppp_print_string(const char *p, u_short len); 372 static void sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr); 373 static void sppp_clear_ip_addrs(struct sppp *sp); 374 #ifdef INET6 375 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, 376 struct in6_addr *dst, struct in6_addr *srcmask); 377 #ifdef IPV6CP_MYIFID_DYN 378 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src); 379 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src); 380 #endif 381 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src); 382 #endif 383 384 /* our control protocol descriptors */ 385 static const struct cp lcp = { 386 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 387 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close, 388 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, 389 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, 390 sppp_lcp_scr 391 }; 392 393 static const struct cp ipcp = { 394 PPP_IPCP, IDX_IPCP, 395 #ifdef INET 396 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 397 #else 398 0, 399 #endif 400 "ipcp", 401 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close, 402 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, 403 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf, 404 sppp_ipcp_scr 405 }; 406 407 static const struct cp ipv6cp = { 408 PPP_IPV6CP, IDX_IPV6CP, 409 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 410 CP_NCP, 411 #else 412 0, 413 #endif 414 "ipv6cp", 415 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close, 416 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak, 417 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf, 418 sppp_ipv6cp_scr 419 }; 420 421 static const struct cp pap = { 422 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 423 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close, 424 sppp_pap_TO, 0, 0, 0, 425 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null, 426 sppp_pap_scr 427 }; 428 429 static const struct cp chap = { 430 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 431 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close, 432 sppp_chap_TO, 0, 0, 0, 433 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null, 434 sppp_chap_scr 435 }; 436 437 static const struct cp *cps[IDX_COUNT] = { 438 &lcp, /* IDX_LCP */ 439 &ipcp, /* IDX_IPCP */ 440 &ipv6cp, /* IDX_IPV6CP */ 441 &pap, /* IDX_PAP */ 442 &chap, /* IDX_CHAP */ 443 }; 444 445 446 /* 447 * Exported functions, comprising our interface to the lower layer. 448 */ 449 450 /* 451 * Process the received packet. 452 */ 453 void 454 sppp_input(struct ifnet *ifp, struct mbuf *m) 455 { 456 struct ppp_header *h = NULL; 457 struct ifqueue *inq = 0; 458 u_int16_t protocol; 459 int s; 460 struct sppp *sp = (struct sppp *)ifp; 461 int debug = ifp->if_flags & IFF_DEBUG; 462 463 if (ifp->if_flags & IFF_UP) 464 /* Count received bytes, add hardware framing */ 465 ifp->if_ibytes += m->m_pkthdr.len + sp->pp_framebytes; 466 467 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 468 /* Too small packet, drop it. */ 469 if (debug) 470 log(LOG_DEBUG, 471 SPP_FMT "input packet is too small, %d bytes\n", 472 SPP_ARGS(ifp), m->m_pkthdr.len); 473 drop: 474 ++ifp->if_ierrors; 475 ++ifp->if_iqdrops; 476 m_freem(m); 477 return; 478 } 479 480 if (sp->pp_flags & PP_NOFRAMING) { 481 memcpy(&protocol, mtod(m, void *), 2); 482 protocol = ntohs(protocol); 483 m_adj(m, 2); 484 } else { 485 486 /* Get PPP header. */ 487 h = mtod(m, struct ppp_header *); 488 m_adj(m, PPP_HEADER_LEN); 489 490 switch (h->address) { 491 case PPP_ALLSTATIONS: 492 if (h->control != PPP_UI) 493 goto invalid; 494 if (sp->pp_flags & PP_CISCO) { 495 if (debug) 496 log(LOG_DEBUG, 497 SPP_FMT "PPP packet in Cisco mode " 498 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 499 SPP_ARGS(ifp), 500 h->address, h->control, ntohs(h->protocol)); 501 goto drop; 502 } 503 break; 504 case CISCO_MULTICAST: 505 case CISCO_UNICAST: 506 /* Don't check the control field here (RFC 1547). */ 507 if (! (sp->pp_flags & PP_CISCO)) { 508 if (debug) 509 log(LOG_DEBUG, 510 SPP_FMT "Cisco packet in PPP mode " 511 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 512 SPP_ARGS(ifp), 513 h->address, h->control, ntohs(h->protocol)); 514 goto drop; 515 } 516 switch (ntohs(h->protocol)) { 517 default: 518 ++ifp->if_noproto; 519 goto invalid; 520 case CISCO_KEEPALIVE: 521 sppp_cisco_input((struct sppp *) ifp, m); 522 m_freem(m); 523 return; 524 #ifdef INET 525 case ETHERTYPE_IP: 526 schednetisr(NETISR_IP); 527 inq = &ipintrq; 528 break; 529 #endif 530 #ifdef INET6 531 case ETHERTYPE_IPV6: 532 schednetisr(NETISR_IPV6); 533 inq = &ip6intrq; 534 break; 535 #endif 536 #ifdef IPX 537 case ETHERTYPE_IPX: 538 schednetisr(NETISR_IPX); 539 inq = &ipxintrq; 540 break; 541 #endif 542 #ifdef NS 543 case ETHERTYPE_NS: 544 schednetisr(NETISR_NS); 545 inq = &nsintrq; 546 break; 547 #endif 548 } 549 goto queue_pkt; 550 default: /* Invalid PPP packet. */ 551 invalid: 552 if (debug) 553 log(LOG_DEBUG, 554 SPP_FMT "invalid input packet " 555 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 556 SPP_ARGS(ifp), 557 h->address, h->control, ntohs(h->protocol)); 558 goto drop; 559 } 560 protocol = ntohs(h->protocol); 561 } 562 563 switch (protocol) { 564 default: 565 if (sp->state[IDX_LCP] == STATE_OPENED) { 566 u_int16_t prot = htons(protocol); 567 sppp_cp_send(sp, PPP_LCP, PROTO_REJ, 568 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2, 569 &prot); 570 } 571 if (debug) 572 log(LOG_DEBUG, 573 SPP_FMT "invalid input protocol " 574 "<proto=0x%x>\n", SPP_ARGS(ifp), ntohs(protocol)); 575 ++ifp->if_noproto; 576 goto drop; 577 case PPP_LCP: 578 sppp_cp_input(&lcp, sp, m); 579 m_freem(m); 580 return; 581 case PPP_PAP: 582 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 583 sppp_pap_input(sp, m); 584 m_freem(m); 585 return; 586 case PPP_CHAP: 587 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 588 sppp_chap_input(sp, m); 589 m_freem(m); 590 return; 591 #ifdef INET 592 case PPP_IPCP: 593 if (sp->pp_phase == SPPP_PHASE_NETWORK) 594 sppp_cp_input(&ipcp, sp, m); 595 m_freem(m); 596 return; 597 case PPP_IP: 598 if (sp->state[IDX_IPCP] == STATE_OPENED) { 599 schednetisr(NETISR_IP); 600 inq = &ipintrq; 601 sp->pp_last_activity = mono_time.tv_sec; 602 } 603 break; 604 #endif 605 #ifdef INET6 606 case PPP_IPV6CP: 607 if (sp->pp_phase == SPPP_PHASE_NETWORK) 608 sppp_cp_input(&ipv6cp, sp, m); 609 m_freem(m); 610 return; 611 612 case PPP_IPV6: 613 if (sp->state[IDX_IPV6CP] == STATE_OPENED) { 614 schednetisr(NETISR_IPV6); 615 inq = &ip6intrq; 616 sp->pp_last_activity = mono_time.tv_sec; 617 } 618 break; 619 #endif 620 #ifdef IPX 621 case PPP_IPX: 622 /* IPX IPXCP not implemented yet */ 623 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 624 schednetisr(NETISR_IPX); 625 inq = &ipxintrq; 626 } 627 break; 628 #endif 629 #ifdef NS 630 case PPP_XNS: 631 /* XNS IDPCP not implemented yet */ 632 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 633 schednetisr(NETISR_NS); 634 inq = &nsintrq; 635 } 636 break; 637 #endif 638 #ifdef ISO 639 case PPP_ISO: 640 /* OSI NLCP not implemented yet */ 641 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 642 schednetisr(NETISR_ISO); 643 inq = &clnlintrq; 644 } 645 break; 646 #endif 647 } 648 649 queue_pkt: 650 if (! (ifp->if_flags & IFF_UP) || ! inq) 651 goto drop; 652 653 /* Check queue. */ 654 s = splnet(); 655 if (IF_QFULL(inq)) { 656 /* Queue overflow. */ 657 IF_DROP(inq); 658 splx(s); 659 if (debug) 660 log(LOG_DEBUG, SPP_FMT "protocol queue overflow\n", 661 SPP_ARGS(ifp)); 662 goto drop; 663 } 664 IF_ENQUEUE(inq, m); 665 splx(s); 666 } 667 668 /* 669 * Enqueue transmit packet. 670 */ 671 static int 672 sppp_output(struct ifnet *ifp, struct mbuf *m, 673 struct sockaddr *dst, struct rtentry *rt) 674 { 675 struct sppp *sp = (struct sppp *) ifp; 676 struct ppp_header *h = NULL; 677 struct ifqueue *ifq = NULL; /* XXX */ 678 int s, len, rv = 0; 679 u_int16_t protocol; 680 ALTQ_DECL(struct altq_pktattr pktattr;) 681 682 s = splnet(); 683 684 sp->pp_last_activity = mono_time.tv_sec; 685 686 if ((ifp->if_flags & IFF_UP) == 0 || 687 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 688 m_freem(m); 689 splx(s); 690 return (ENETDOWN); 691 } 692 693 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 694 /* 695 * Interface is not yet running, but auto-dial. Need 696 * to start LCP for it. 697 */ 698 ifp->if_flags |= IFF_RUNNING; 699 splx(s); 700 lcp.Open(sp); 701 s = splnet(); 702 } 703 704 /* 705 * If the queueing discipline needs packet classification, 706 * do it before prepending link headers. 707 */ 708 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr); 709 710 #ifdef INET 711 if (dst->sa_family == AF_INET) { 712 struct ip *ip = NULL; 713 struct tcphdr *th = NULL; 714 715 if (m->m_len >= sizeof(struct ip)) { 716 ip = mtod(m, struct ip *); 717 if (ip->ip_p == IPPROTO_TCP && 718 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + 719 sizeof(struct tcphdr)) { 720 th = (struct tcphdr *) 721 ((caddr_t)ip + (ip->ip_hl << 2)); 722 } 723 } else 724 ip = NULL; 725 726 /* 727 * When using dynamic local IP address assignment by using 728 * 0.0.0.0 as a local address, the first TCP session will 729 * not connect because the local TCP checksum is computed 730 * using 0.0.0.0 which will later become our real IP address 731 * so the TCP checksum computed at the remote end will 732 * become invalid. So we 733 * - don't let packets with src ip addr 0 thru 734 * - we flag TCP packets with src ip 0 as an error 735 */ 736 if (ip && ip->ip_src.s_addr == INADDR_ANY) { 737 u_int8_t proto = ip->ip_p; 738 739 m_freem(m); 740 splx(s); 741 if (proto == IPPROTO_TCP) 742 return (EADDRNOTAVAIL); 743 else 744 return (0); 745 } 746 747 /* 748 * Put low delay, telnet, rlogin and ftp control packets 749 * in front of the queue. 750 */ 751 752 if (!IF_QFULL(&sp->pp_fastq) && 753 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 754 (th && (INTERACTIVE(ntohs(th->th_sport)) || 755 INTERACTIVE(ntohs(th->th_dport)))))) 756 ifq = &sp->pp_fastq; 757 } 758 #endif 759 760 #ifdef INET6 761 if (dst->sa_family == AF_INET6) { 762 /* XXX do something tricky here? */ 763 } 764 #endif 765 766 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 767 /* 768 * Prepend general data packet PPP header. For now, IP only. 769 */ 770 M_PREPEND(m, PPP_HEADER_LEN, M_DONTWAIT); 771 if (! m) { 772 if (ifp->if_flags & IFF_DEBUG) 773 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 774 SPP_ARGS(ifp)); 775 ++ifp->if_oerrors; 776 splx(s); 777 return (ENOBUFS); 778 } 779 /* 780 * May want to check size of packet 781 * (albeit due to the implementation it's always enough) 782 */ 783 h = mtod(m, struct ppp_header *); 784 if (sp->pp_flags & PP_CISCO) { 785 h->address = CISCO_UNICAST; /* unicast address */ 786 h->control = 0; 787 } else { 788 h->address = PPP_ALLSTATIONS; /* broadcast address */ 789 h->control = PPP_UI; /* Unnumbered Info */ 790 } 791 } 792 793 switch (dst->sa_family) { 794 #ifdef INET 795 case AF_INET: /* Internet Protocol */ 796 if (sp->pp_flags & PP_CISCO) 797 protocol = htons(ETHERTYPE_IP); 798 else { 799 /* 800 * Don't choke with an ENETDOWN early. It's 801 * possible that we just started dialing out, 802 * so don't drop the packet immediately. If 803 * we notice that we run out of buffer space 804 * below, we will however remember that we are 805 * not ready to carry IP packets, and return 806 * ENETDOWN, as opposed to ENOBUFS. 807 */ 808 protocol = htons(PPP_IP); 809 if (sp->state[IDX_IPCP] != STATE_OPENED) 810 rv = ENETDOWN; 811 } 812 break; 813 #endif 814 #ifdef INET6 815 case AF_INET6: /* Internet Protocol version 6 */ 816 if (sp->pp_flags & PP_CISCO) 817 protocol = htons(ETHERTYPE_IPV6); 818 else { 819 /* 820 * Don't choke with an ENETDOWN early. It's 821 * possible that we just started dialing out, 822 * so don't drop the packet immediately. If 823 * we notice that we run out of buffer space 824 * below, we will however remember that we are 825 * not ready to carry IP packets, and return 826 * ENETDOWN, as opposed to ENOBUFS. 827 */ 828 protocol = htons(PPP_IPV6); 829 if (sp->state[IDX_IPV6CP] != STATE_OPENED) 830 rv = ENETDOWN; 831 } 832 break; 833 #endif 834 #ifdef NS 835 case AF_NS: /* Xerox NS Protocol */ 836 protocol = htons((sp->pp_flags & PP_CISCO) ? 837 ETHERTYPE_NS : PPP_XNS); 838 break; 839 #endif 840 #ifdef IPX 841 case AF_IPX: /* Novell IPX Protocol */ 842 protocol = htons((sp->pp_flags & PP_CISCO) ? 843 ETHERTYPE_IPX : PPP_IPX); 844 break; 845 #endif 846 #ifdef ISO 847 case AF_ISO: /* ISO OSI Protocol */ 848 if (sp->pp_flags & PP_CISCO) 849 goto nosupport; 850 protocol = htons(PPP_ISO); 851 break; 852 nosupport: 853 #endif 854 default: 855 m_freem(m); 856 ++ifp->if_oerrors; 857 splx(s); 858 return (EAFNOSUPPORT); 859 } 860 861 if (sp->pp_flags & PP_NOFRAMING) { 862 M_PREPEND(m, 2, M_DONTWAIT); 863 if (m == NULL) { 864 if (ifp->if_flags & IFF_DEBUG) 865 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 866 SPP_ARGS(ifp)); 867 ++ifp->if_oerrors; 868 splx(s); 869 return (ENOBUFS); 870 } 871 *mtod(m, u_int16_t *) = protocol; 872 } else { 873 h->protocol = protocol; 874 } 875 876 /* 877 * Queue message on interface, and start output if interface 878 * not yet active. 879 */ 880 len = m->m_pkthdr.len; 881 if (ifq != NULL 882 #ifdef ALTQ 883 && ALTQ_IS_ENABLED(&ifp->if_snd) == 0 884 #endif 885 ) { 886 if (IF_QFULL(ifq)) { 887 IF_DROP(&ifp->if_snd); 888 m_freem(m); 889 if (rv == 0) 890 rv = ENOBUFS; 891 } 892 else 893 IF_ENQUEUE(ifq, m); 894 } else 895 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, rv); 896 if (rv != 0) { 897 ++ifp->if_oerrors; 898 splx(s); 899 return (rv); 900 } 901 902 if (! (ifp->if_flags & IFF_OACTIVE)) 903 (*ifp->if_start)(ifp); 904 905 /* 906 * Count output packets and bytes. 907 * The packet length includes header + additional hardware framing 908 * according to RFC 1333. 909 */ 910 ifp->if_obytes += len + sp->pp_framebytes; 911 splx(s); 912 return (0); 913 } 914 915 void 916 sppp_attach(struct ifnet *ifp) 917 { 918 struct sppp *sp = (struct sppp *) ifp; 919 920 /* Initialize keepalive handler. */ 921 if (! spppq) { 922 callout_init(&keepalive_ch); 923 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 924 } 925 926 /* Insert new entry into the keepalive list. */ 927 sp->pp_next = spppq; 928 spppq = sp; 929 930 sp->pp_if.if_type = IFT_PPP; 931 sp->pp_if.if_output = sppp_output; 932 sp->pp_fastq.ifq_maxlen = 32; 933 sp->pp_cpq.ifq_maxlen = 20; 934 sp->pp_loopcnt = 0; 935 sp->pp_alivecnt = 0; 936 sp->pp_last_activity = 0; 937 sp->pp_idle_timeout = 0; 938 memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq)); 939 memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq)); 940 sp->pp_auth_failures = 0; 941 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 942 sp->pp_phase = SPPP_PHASE_DEAD; 943 sp->pp_up = lcp.Up; 944 sp->pp_down = lcp.Down; 945 946 if_alloc_sadl(ifp); 947 948 memset(&sp->myauth, 0, sizeof sp->myauth); 949 memset(&sp->hisauth, 0, sizeof sp->hisauth); 950 sppp_lcp_init(sp); 951 sppp_ipcp_init(sp); 952 sppp_ipv6cp_init(sp); 953 sppp_pap_init(sp); 954 sppp_chap_init(sp); 955 } 956 957 void 958 sppp_detach(struct ifnet *ifp) 959 { 960 struct sppp **q, *p, *sp = (struct sppp *) ifp; 961 int i; 962 963 /* Remove the entry from the keepalive list. */ 964 for (q = &spppq; (p = *q); q = &p->pp_next) 965 if (p == sp) { 966 *q = p->pp_next; 967 break; 968 } 969 970 /* Stop keepalive handler. */ 971 if (! spppq) { 972 callout_stop(&keepalive_ch); 973 } 974 975 for (i = 0; i < IDX_COUNT; i++) { 976 callout_stop(&sp->ch[i]); 977 } 978 callout_stop(&sp->pap_my_to_ch); 979 980 /* free authentication info */ 981 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 982 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 983 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 984 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 985 986 if_free_sadl(ifp); 987 } 988 989 /* 990 * Flush the interface output queue. 991 */ 992 void 993 sppp_flush(struct ifnet *ifp) 994 { 995 struct sppp *sp = (struct sppp *) ifp; 996 997 IFQ_PURGE(&sp->pp_if.if_snd); 998 IF_PURGE(&sp->pp_fastq); 999 IF_PURGE(&sp->pp_cpq); 1000 } 1001 1002 /* 1003 * Check if the output queue is empty. 1004 */ 1005 int 1006 sppp_isempty(struct ifnet *ifp) 1007 { 1008 struct sppp *sp = (struct sppp *) ifp; 1009 int empty, s; 1010 1011 s = splnet(); 1012 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1013 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1014 splx(s); 1015 return (empty); 1016 } 1017 1018 /* 1019 * Get next packet to send. 1020 */ 1021 struct mbuf * 1022 sppp_dequeue(struct ifnet *ifp) 1023 { 1024 struct sppp *sp = (struct sppp *) ifp; 1025 struct mbuf *m; 1026 int s; 1027 1028 s = splnet(); 1029 /* 1030 * Process only the control protocol queue until we have at 1031 * least one NCP open. 1032 * 1033 * Do always serve all three queues in Cisco mode. 1034 */ 1035 IF_DEQUEUE(&sp->pp_cpq, m); 1036 if (m == NULL && 1037 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1038 IF_DEQUEUE(&sp->pp_fastq, m); 1039 if (m == NULL) 1040 IF_DEQUEUE(&sp->pp_if.if_snd, m); 1041 } 1042 splx(s); 1043 return m; 1044 } 1045 1046 /* 1047 * Pick the next packet, do not remove it from the queue. 1048 */ 1049 struct mbuf * 1050 sppp_pick(struct ifnet *ifp) 1051 { 1052 struct sppp *sp = (struct sppp *)ifp; 1053 struct mbuf *m; 1054 int s; 1055 1056 s= splnet(); 1057 1058 m = sp->pp_cpq.ifq_head; 1059 if (m == NULL && 1060 (sp->pp_phase == SPPP_PHASE_NETWORK || 1061 (sp->pp_flags & PP_CISCO) != 0)) 1062 if ((m = sp->pp_fastq.ifq_head) == NULL) 1063 m = sp->pp_if.if_snd.ifq_head; 1064 splx(s); 1065 return (m); 1066 } 1067 1068 /* 1069 * Process an ioctl request. Called on low priority level. 1070 */ 1071 int 1072 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1073 { 1074 struct ifreq *ifr = (struct ifreq *) data; 1075 struct sppp *sp = (struct sppp *) ifp; 1076 int s, error=0, going_up, going_down, newmode; 1077 1078 s = splnet(); 1079 switch (cmd) { 1080 case SIOCAIFADDR: 1081 case SIOCSIFDSTADDR: 1082 break; 1083 1084 case SIOCSIFADDR: 1085 if_up(ifp); 1086 /* fall through... */ 1087 1088 case SIOCSIFFLAGS: 1089 going_up = ifp->if_flags & IFF_UP && 1090 (ifp->if_flags & IFF_RUNNING) == 0; 1091 going_down = (ifp->if_flags & IFF_UP) == 0 && 1092 ifp->if_flags & IFF_RUNNING; 1093 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1094 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1095 /* sanity */ 1096 newmode = IFF_PASSIVE; 1097 ifp->if_flags &= ~IFF_AUTO; 1098 } 1099 1100 if (going_up || going_down) 1101 lcp.Close(sp); 1102 if (going_up && newmode == 0) { 1103 /* neither auto-dial nor passive */ 1104 ifp->if_flags |= IFF_RUNNING; 1105 if (!(sp->pp_flags & PP_CISCO)) 1106 lcp.Open(sp); 1107 } else if (going_down) { 1108 sppp_flush(ifp); 1109 ifp->if_flags &= ~IFF_RUNNING; 1110 } 1111 1112 break; 1113 1114 #ifdef SIOCSIFMTU 1115 #ifndef ifr_mtu 1116 #define ifr_mtu ifr_metric 1117 #endif 1118 case SIOCSIFMTU: 1119 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru) 1120 return (EINVAL); 1121 ifp->if_mtu = ifr->ifr_mtu; 1122 break; 1123 #endif 1124 #ifdef SLIOCSETMTU 1125 case SLIOCSETMTU: 1126 if (*(short *)data < 128 || *(short *)data > sp->lcp.their_mru) 1127 return (EINVAL); 1128 ifp->if_mtu = *(short *)data; 1129 break; 1130 #endif 1131 #ifdef SIOCGIFMTU 1132 case SIOCGIFMTU: 1133 ifr->ifr_mtu = ifp->if_mtu; 1134 break; 1135 #endif 1136 #ifdef SLIOCGETMTU 1137 case SLIOCGETMTU: 1138 *(short *)data = ifp->if_mtu; 1139 break; 1140 #endif 1141 case SIOCADDMULTI: 1142 case SIOCDELMULTI: 1143 break; 1144 1145 case SPPPSETAUTHCFG: 1146 case SPPPSETLCPCFG: 1147 case SPPPSETIDLETO: 1148 case SPPPSETAUTHFAILURE: 1149 case SPPPSETDNSOPTS: 1150 { 1151 struct proc *p = curproc; /* XXX */ 1152 1153 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1154 break; 1155 } 1156 /* FALLTHROUGH */ 1157 case SPPPGETAUTHCFG: 1158 case SPPPGETLCPCFG: 1159 case SPPPGETSTATUS: 1160 case SPPPGETIDLETO: 1161 case SPPPGETAUTHFAILURES: 1162 case SPPPGETDNSOPTS: 1163 case SPPPGETDNSADDRS: 1164 error = sppp_params(sp, cmd, data); 1165 break; 1166 1167 default: 1168 error = ENOTTY; 1169 } 1170 splx(s); 1171 return (error); 1172 } 1173 1174 1175 /* 1176 * Cisco framing implementation. 1177 */ 1178 1179 /* 1180 * Handle incoming Cisco keepalive protocol packets. 1181 */ 1182 static void 1183 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1184 { 1185 STDDCL; 1186 struct cisco_packet *h; 1187 u_int32_t me, mymask; 1188 1189 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1190 if (debug) 1191 log(LOG_DEBUG, 1192 SPP_FMT "cisco invalid packet length: %d bytes\n", 1193 SPP_ARGS(ifp), m->m_pkthdr.len); 1194 return; 1195 } 1196 h = mtod(m, struct cisco_packet *); 1197 if (debug) 1198 log(LOG_DEBUG, 1199 SPP_FMT "cisco input: %d bytes " 1200 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1201 SPP_ARGS(ifp), m->m_pkthdr.len, 1202 ntohl (h->type), h->par1, h->par2, (u_int)h->rel, 1203 (u_int)h->time0, (u_int)h->time1); 1204 switch (ntohl (h->type)) { 1205 default: 1206 if (debug) 1207 addlog(SPP_FMT "cisco unknown packet type: 0x%x\n", 1208 SPP_ARGS(ifp), ntohl (h->type)); 1209 break; 1210 case CISCO_ADDR_REPLY: 1211 /* Reply on address request, ignore */ 1212 break; 1213 case CISCO_KEEPALIVE_REQ: 1214 sp->pp_alivecnt = 0; 1215 sp->pp_rseq[IDX_LCP] = ntohl (h->par1); 1216 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1217 /* Local and remote sequence numbers are equal. 1218 * Probably, the line is in loopback mode. */ 1219 if (sp->pp_loopcnt >= MAXALIVECNT) { 1220 printf (SPP_FMT "loopback\n", 1221 SPP_ARGS(ifp)); 1222 sp->pp_loopcnt = 0; 1223 if (ifp->if_flags & IFF_UP) { 1224 if_down(ifp); 1225 IF_PURGE(&sp->pp_cpq); 1226 } 1227 } 1228 ++sp->pp_loopcnt; 1229 1230 /* Generate new local sequence number */ 1231 sp->pp_seq[IDX_LCP] = random(); 1232 break; 1233 } 1234 sp->pp_loopcnt = 0; 1235 if (! (ifp->if_flags & IFF_UP) && 1236 (ifp->if_flags & IFF_RUNNING)) { 1237 if_up(ifp); 1238 } 1239 break; 1240 case CISCO_ADDR_REQ: 1241 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1242 if (me != 0L) 1243 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1244 break; 1245 } 1246 } 1247 1248 /* 1249 * Send Cisco keepalive packet. 1250 */ 1251 static void 1252 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1253 { 1254 STDDCL; 1255 struct ppp_header *h; 1256 struct cisco_packet *ch; 1257 struct mbuf *m; 1258 u_int32_t t = (time.tv_sec - boottime.tv_sec) * 1000; 1259 1260 MGETHDR(m, M_DONTWAIT, MT_DATA); 1261 if (! m) 1262 return; 1263 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1264 m->m_pkthdr.rcvif = 0; 1265 1266 h = mtod(m, struct ppp_header *); 1267 h->address = CISCO_MULTICAST; 1268 h->control = 0; 1269 h->protocol = htons(CISCO_KEEPALIVE); 1270 1271 ch = (struct cisco_packet *)(h + 1); 1272 ch->type = htonl(type); 1273 ch->par1 = htonl(par1); 1274 ch->par2 = htonl(par2); 1275 ch->rel = -1; 1276 1277 ch->time0 = htons((u_short)(t >> 16)); 1278 ch->time1 = htons((u_short) t); 1279 1280 if (debug) 1281 log(LOG_DEBUG, 1282 SPP_FMT "cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1283 SPP_ARGS(ifp), ntohl (ch->type), ch->par1, 1284 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1285 (u_int)ch->time1); 1286 1287 if (IF_QFULL(&sp->pp_cpq)) { 1288 IF_DROP(&sp->pp_fastq); 1289 IF_DROP(&ifp->if_snd); 1290 m_freem(m); 1291 ++ifp->if_oerrors; 1292 return; 1293 } else 1294 IF_ENQUEUE(&sp->pp_cpq, m); 1295 if (! (ifp->if_flags & IFF_OACTIVE)) 1296 (*ifp->if_start)(ifp); 1297 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1298 } 1299 1300 /* 1301 * PPP protocol implementation. 1302 */ 1303 1304 /* 1305 * Send PPP control protocol packet. 1306 */ 1307 static void 1308 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1309 u_char ident, u_short len, void *data) 1310 { 1311 STDDCL; 1312 struct lcp_header *lh; 1313 struct mbuf *m; 1314 size_t pkthdrlen; 1315 1316 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1317 1318 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1319 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1320 MGETHDR(m, M_DONTWAIT, MT_DATA); 1321 if (! m) 1322 return; 1323 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1324 m->m_pkthdr.rcvif = 0; 1325 1326 if (sp->pp_flags & PP_NOFRAMING) { 1327 *mtod(m, u_int16_t *) = htons(proto); 1328 lh = (struct lcp_header *)(mtod(m, u_int8_t *) + 2); 1329 } else { 1330 struct ppp_header *h; 1331 h = mtod(m, struct ppp_header *); 1332 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1333 h->control = PPP_UI; /* Unnumbered Info */ 1334 h->protocol = htons(proto); /* Link Control Protocol */ 1335 lh = (struct lcp_header *)(h + 1); 1336 } 1337 lh->type = type; 1338 lh->ident = ident; 1339 lh->len = htons(LCP_HEADER_LEN + len); 1340 if (len) 1341 bcopy (data, lh + 1, len); 1342 1343 if (debug) { 1344 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 1345 SPP_ARGS(ifp), 1346 sppp_proto_name(proto), 1347 sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len)); 1348 if (len) 1349 sppp_print_bytes((u_char *)(lh + 1), len); 1350 addlog(">\n"); 1351 } 1352 if (IF_QFULL(&sp->pp_cpq)) { 1353 IF_DROP(&sp->pp_fastq); 1354 IF_DROP(&ifp->if_snd); 1355 m_freem(m); 1356 ++ifp->if_oerrors; 1357 return; 1358 } else 1359 IF_ENQUEUE(&sp->pp_cpq, m); 1360 if (! (ifp->if_flags & IFF_OACTIVE)) 1361 (*ifp->if_start)(ifp); 1362 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1363 } 1364 1365 /* 1366 * Handle incoming PPP control protocol packets. 1367 */ 1368 static void 1369 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1370 { 1371 STDDCL; 1372 struct lcp_header *h; 1373 int len = m->m_pkthdr.len; 1374 int rv; 1375 u_char *p; 1376 u_int32_t u32; 1377 1378 if (len < 4) { 1379 if (debug) 1380 log(LOG_DEBUG, 1381 SPP_FMT "%s invalid packet length: %d bytes\n", 1382 SPP_ARGS(ifp), cp->name, len); 1383 return; 1384 } 1385 h = mtod(m, struct lcp_header *); 1386 if (debug) { 1387 log(LOG_DEBUG, 1388 SPP_FMT "%s input(%s): <%s id=0x%x len=%d", 1389 SPP_ARGS(ifp), cp->name, 1390 sppp_state_name(sp->state[cp->protoidx]), 1391 sppp_cp_type_name(h->type), h->ident, ntohs(h->len)); 1392 if (len > 4) 1393 sppp_print_bytes((u_char *)(h + 1), len - 4); 1394 addlog(">\n"); 1395 } 1396 if (len > ntohs(h->len)) 1397 len = ntohs(h->len); 1398 p = (u_char *)(h + 1); 1399 switch (h->type) { 1400 case CONF_REQ: 1401 if (len < 4) { 1402 if (debug) 1403 addlog(SPP_FMT "%s invalid conf-req length %d\n", 1404 SPP_ARGS(ifp), cp->name, 1405 len); 1406 ++ifp->if_ierrors; 1407 break; 1408 } 1409 /* handle states where RCR doesn't get a SCA/SCN */ 1410 switch (sp->state[cp->protoidx]) { 1411 case STATE_CLOSING: 1412 case STATE_STOPPING: 1413 return; 1414 case STATE_CLOSED: 1415 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1416 0, 0); 1417 return; 1418 } 1419 rv = (cp->RCR)(sp, h, len); 1420 switch (sp->state[cp->protoidx]) { 1421 case STATE_OPENED: 1422 (cp->tld)(sp); 1423 (cp->scr)(sp); 1424 /* fall through... */ 1425 case STATE_ACK_SENT: 1426 case STATE_REQ_SENT: 1427 sppp_cp_change_state(cp, sp, rv? 1428 STATE_ACK_SENT: STATE_REQ_SENT); 1429 break; 1430 case STATE_STOPPED: 1431 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1432 (cp->scr)(sp); 1433 sppp_cp_change_state(cp, sp, rv? 1434 STATE_ACK_SENT: STATE_REQ_SENT); 1435 break; 1436 case STATE_ACK_RCVD: 1437 if (rv) { 1438 sppp_cp_change_state(cp, sp, STATE_OPENED); 1439 if (debug) 1440 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1441 SPP_ARGS(ifp), 1442 cp->name); 1443 (cp->tlu)(sp); 1444 } else 1445 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1446 break; 1447 default: 1448 printf(SPP_FMT "%s illegal %s in state %s\n", 1449 SPP_ARGS(ifp), cp->name, 1450 sppp_cp_type_name(h->type), 1451 sppp_state_name(sp->state[cp->protoidx])); 1452 ++ifp->if_ierrors; 1453 } 1454 break; 1455 case CONF_ACK: 1456 if (h->ident != sp->confid[cp->protoidx]) { 1457 if (debug) 1458 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1459 SPP_ARGS(ifp), cp->name, 1460 h->ident, sp->confid[cp->protoidx]); 1461 ++ifp->if_ierrors; 1462 break; 1463 } 1464 switch (sp->state[cp->protoidx]) { 1465 case STATE_CLOSED: 1466 case STATE_STOPPED: 1467 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1468 break; 1469 case STATE_CLOSING: 1470 case STATE_STOPPING: 1471 break; 1472 case STATE_REQ_SENT: 1473 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1474 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1475 break; 1476 case STATE_OPENED: 1477 (cp->tld)(sp); 1478 /* fall through */ 1479 case STATE_ACK_RCVD: 1480 (cp->scr)(sp); 1481 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1482 break; 1483 case STATE_ACK_SENT: 1484 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1485 sppp_cp_change_state(cp, sp, STATE_OPENED); 1486 if (debug) 1487 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1488 SPP_ARGS(ifp), cp->name); 1489 (cp->tlu)(sp); 1490 break; 1491 default: 1492 printf(SPP_FMT "%s illegal %s in state %s\n", 1493 SPP_ARGS(ifp), cp->name, 1494 sppp_cp_type_name(h->type), 1495 sppp_state_name(sp->state[cp->protoidx])); 1496 ++ifp->if_ierrors; 1497 } 1498 break; 1499 case CONF_NAK: 1500 case CONF_REJ: 1501 if (h->ident != sp->confid[cp->protoidx]) { 1502 if (debug) 1503 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1504 SPP_ARGS(ifp), cp->name, 1505 h->ident, sp->confid[cp->protoidx]); 1506 ++ifp->if_ierrors; 1507 break; 1508 } 1509 if (h->type == CONF_NAK) 1510 (cp->RCN_nak)(sp, h, len); 1511 else /* CONF_REJ */ 1512 (cp->RCN_rej)(sp, h, len); 1513 1514 switch (sp->state[cp->protoidx]) { 1515 case STATE_CLOSED: 1516 case STATE_STOPPED: 1517 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1518 break; 1519 case STATE_REQ_SENT: 1520 case STATE_ACK_SENT: 1521 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1522 (cp->scr)(sp); 1523 break; 1524 case STATE_OPENED: 1525 (cp->tld)(sp); 1526 /* fall through */ 1527 case STATE_ACK_RCVD: 1528 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1529 (cp->scr)(sp); 1530 break; 1531 case STATE_CLOSING: 1532 case STATE_STOPPING: 1533 break; 1534 default: 1535 printf(SPP_FMT "%s illegal %s in state %s\n", 1536 SPP_ARGS(ifp), cp->name, 1537 sppp_cp_type_name(h->type), 1538 sppp_state_name(sp->state[cp->protoidx])); 1539 ++ifp->if_ierrors; 1540 } 1541 break; 1542 1543 case TERM_REQ: 1544 switch (sp->state[cp->protoidx]) { 1545 case STATE_ACK_RCVD: 1546 case STATE_ACK_SENT: 1547 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1548 /* fall through */ 1549 case STATE_CLOSED: 1550 case STATE_STOPPED: 1551 case STATE_CLOSING: 1552 case STATE_STOPPING: 1553 case STATE_REQ_SENT: 1554 sta: 1555 /* Send Terminate-Ack packet. */ 1556 if (debug) 1557 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n", 1558 SPP_ARGS(ifp), cp->name); 1559 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1560 break; 1561 case STATE_OPENED: 1562 (cp->tld)(sp); 1563 sp->rst_counter[cp->protoidx] = 0; 1564 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1565 goto sta; 1566 break; 1567 default: 1568 printf(SPP_FMT "%s illegal %s in state %s\n", 1569 SPP_ARGS(ifp), cp->name, 1570 sppp_cp_type_name(h->type), 1571 sppp_state_name(sp->state[cp->protoidx])); 1572 ++ifp->if_ierrors; 1573 } 1574 break; 1575 case TERM_ACK: 1576 switch (sp->state[cp->protoidx]) { 1577 case STATE_CLOSED: 1578 case STATE_STOPPED: 1579 case STATE_REQ_SENT: 1580 case STATE_ACK_SENT: 1581 break; 1582 case STATE_CLOSING: 1583 (cp->tlf)(sp); 1584 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1585 sppp_lcp_check_and_close(sp); 1586 break; 1587 case STATE_STOPPING: 1588 (cp->tlf)(sp); 1589 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1590 sppp_lcp_check_and_close(sp); 1591 break; 1592 case STATE_ACK_RCVD: 1593 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1594 break; 1595 case STATE_OPENED: 1596 (cp->tld)(sp); 1597 (cp->scr)(sp); 1598 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1599 break; 1600 default: 1601 printf(SPP_FMT "%s illegal %s in state %s\n", 1602 SPP_ARGS(ifp), cp->name, 1603 sppp_cp_type_name(h->type), 1604 sppp_state_name(sp->state[cp->protoidx])); 1605 ++ifp->if_ierrors; 1606 } 1607 break; 1608 case CODE_REJ: 1609 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1610 log(LOG_INFO, 1611 SPP_FMT "%s: ignoring RXJ (%s) for code ?, " 1612 "danger will robinson\n", 1613 SPP_ARGS(ifp), cp->name, 1614 sppp_cp_type_name(h->type)); 1615 switch (sp->state[cp->protoidx]) { 1616 case STATE_CLOSED: 1617 case STATE_STOPPED: 1618 case STATE_REQ_SENT: 1619 case STATE_ACK_SENT: 1620 case STATE_CLOSING: 1621 case STATE_STOPPING: 1622 case STATE_OPENED: 1623 break; 1624 case STATE_ACK_RCVD: 1625 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1626 break; 1627 default: 1628 printf(SPP_FMT "%s illegal %s in state %s\n", 1629 SPP_ARGS(ifp), cp->name, 1630 sppp_cp_type_name(h->type), 1631 sppp_state_name(sp->state[cp->protoidx])); 1632 ++ifp->if_ierrors; 1633 } 1634 break; 1635 case PROTO_REJ: 1636 { 1637 int catastrophic; 1638 const struct cp *upper; 1639 int i; 1640 u_int16_t proto; 1641 1642 catastrophic = 0; 1643 upper = NULL; 1644 proto = p[0] << 8 | p[1]; 1645 for (i = 0; i < IDX_COUNT; i++) { 1646 if (cps[i]->proto == proto) { 1647 upper = cps[i]; 1648 break; 1649 } 1650 } 1651 if (upper == NULL) 1652 catastrophic++; 1653 1654 if (debug) 1655 log(LOG_INFO, 1656 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1657 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+', 1658 sppp_cp_type_name(h->type), proto, 1659 upper ? upper->name : "unknown", 1660 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1661 1662 /* 1663 * if we got RXJ+ against conf-req, the peer does not implement 1664 * this particular protocol type. terminate the protocol. 1665 */ 1666 if (upper && !catastrophic) { 1667 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1668 upper->Close(sp); 1669 break; 1670 } 1671 } 1672 1673 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1674 switch (sp->state[cp->protoidx]) { 1675 case STATE_CLOSED: 1676 case STATE_STOPPED: 1677 case STATE_REQ_SENT: 1678 case STATE_ACK_SENT: 1679 case STATE_CLOSING: 1680 case STATE_STOPPING: 1681 case STATE_OPENED: 1682 break; 1683 case STATE_ACK_RCVD: 1684 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1685 break; 1686 default: 1687 printf(SPP_FMT "%s illegal %s in state %s\n", 1688 SPP_ARGS(ifp), cp->name, 1689 sppp_cp_type_name(h->type), 1690 sppp_state_name(sp->state[cp->protoidx])); 1691 ++ifp->if_ierrors; 1692 } 1693 break; 1694 } 1695 case DISC_REQ: 1696 if (cp->proto != PPP_LCP) 1697 goto illegal; 1698 /* Discard the packet. */ 1699 break; 1700 case ECHO_REQ: 1701 if (cp->proto != PPP_LCP) 1702 goto illegal; 1703 if (sp->state[cp->protoidx] != STATE_OPENED) { 1704 if (debug) 1705 addlog(SPP_FMT "lcp echo req but lcp closed\n", 1706 SPP_ARGS(ifp)); 1707 ++ifp->if_ierrors; 1708 break; 1709 } 1710 if (len < 8) { 1711 if (debug) 1712 addlog(SPP_FMT "invalid lcp echo request " 1713 "packet length: %d bytes\n", 1714 SPP_ARGS(ifp), len); 1715 break; 1716 } 1717 memcpy(&u32, h + 1, sizeof u32); 1718 if (ntohl(u32) == sp->lcp.magic) { 1719 /* Line loopback mode detected. */ 1720 printf(SPP_FMT "loopback\n", SPP_ARGS(ifp)); 1721 if_down(ifp); 1722 IF_PURGE(&sp->pp_cpq); 1723 1724 /* Shut down the PPP link. */ 1725 /* XXX */ 1726 lcp.Down(sp); 1727 lcp.Up(sp); 1728 break; 1729 } 1730 u32 = htonl(sp->lcp.magic); 1731 memcpy(h + 1, &u32, sizeof u32); 1732 if (debug) 1733 addlog(SPP_FMT "got lcp echo req, sending echo rep\n", 1734 SPP_ARGS(ifp)); 1735 sppp_cp_send(sp, PPP_LCP, ECHO_REPLY, h->ident, len - 4, 1736 h + 1); 1737 break; 1738 case ECHO_REPLY: 1739 if (cp->proto != PPP_LCP) 1740 goto illegal; 1741 if (h->ident != sp->lcp.echoid) { 1742 ++ifp->if_ierrors; 1743 break; 1744 } 1745 if (len < 8) { 1746 if (debug) 1747 addlog(SPP_FMT "lcp invalid echo reply " 1748 "packet length: %d bytes\n", 1749 SPP_ARGS(ifp), len); 1750 break; 1751 } 1752 if (debug) 1753 addlog(SPP_FMT "lcp got echo rep\n", 1754 SPP_ARGS(ifp)); 1755 memcpy(&u32, h + 1, sizeof u32); 1756 if (ntohl(u32) != sp->lcp.magic) 1757 sp->pp_alivecnt = 0; 1758 break; 1759 default: 1760 /* Unknown packet type -- send Code-Reject packet. */ 1761 illegal: 1762 if (debug) 1763 addlog(SPP_FMT "%s send code-rej for 0x%x\n", 1764 SPP_ARGS(ifp), cp->name, h->type); 1765 sppp_cp_send(sp, cp->proto, CODE_REJ, 1766 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1767 ++ifp->if_ierrors; 1768 } 1769 } 1770 1771 1772 /* 1773 * The generic part of all Up/Down/Open/Close/TO event handlers. 1774 * Basically, the state transition handling in the automaton. 1775 */ 1776 static void 1777 sppp_up_event(const struct cp *cp, struct sppp *sp) 1778 { 1779 STDDCL; 1780 1781 if (debug) 1782 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n", 1783 SPP_ARGS(ifp), cp->name, 1784 sppp_state_name(sp->state[cp->protoidx])); 1785 1786 switch (sp->state[cp->protoidx]) { 1787 case STATE_INITIAL: 1788 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1789 break; 1790 case STATE_STARTING: 1791 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1792 (cp->scr)(sp); 1793 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1794 break; 1795 default: 1796 printf(SPP_FMT "%s illegal up in state %s\n", 1797 SPP_ARGS(ifp), cp->name, 1798 sppp_state_name(sp->state[cp->protoidx])); 1799 } 1800 } 1801 1802 static void 1803 sppp_down_event(const struct cp *cp, struct sppp *sp) 1804 { 1805 STDDCL; 1806 1807 if (debug) 1808 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n", 1809 SPP_ARGS(ifp), cp->name, 1810 sppp_state_name(sp->state[cp->protoidx])); 1811 1812 switch (sp->state[cp->protoidx]) { 1813 case STATE_CLOSED: 1814 case STATE_CLOSING: 1815 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1816 break; 1817 case STATE_STOPPED: 1818 (cp->tls)(sp); 1819 /* fall through */ 1820 case STATE_STOPPING: 1821 case STATE_REQ_SENT: 1822 case STATE_ACK_RCVD: 1823 case STATE_ACK_SENT: 1824 sppp_cp_change_state(cp, sp, STATE_STARTING); 1825 break; 1826 case STATE_OPENED: 1827 (cp->tld)(sp); 1828 sppp_cp_change_state(cp, sp, STATE_STARTING); 1829 break; 1830 default: 1831 printf(SPP_FMT "%s illegal down in state %s\n", 1832 SPP_ARGS(ifp), cp->name, 1833 sppp_state_name(sp->state[cp->protoidx])); 1834 } 1835 } 1836 1837 1838 static void 1839 sppp_open_event(const struct cp *cp, struct sppp *sp) 1840 { 1841 STDDCL; 1842 1843 if (debug) 1844 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n", 1845 SPP_ARGS(ifp), cp->name, 1846 sppp_state_name(sp->state[cp->protoidx])); 1847 1848 switch (sp->state[cp->protoidx]) { 1849 case STATE_INITIAL: 1850 (cp->tls)(sp); 1851 sppp_cp_change_state(cp, sp, STATE_STARTING); 1852 break; 1853 case STATE_STARTING: 1854 break; 1855 case STATE_CLOSED: 1856 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1857 (cp->scr)(sp); 1858 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1859 break; 1860 case STATE_STOPPED: 1861 case STATE_STOPPING: 1862 case STATE_REQ_SENT: 1863 case STATE_ACK_RCVD: 1864 case STATE_ACK_SENT: 1865 case STATE_OPENED: 1866 break; 1867 case STATE_CLOSING: 1868 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1869 break; 1870 } 1871 } 1872 1873 1874 static void 1875 sppp_close_event(const struct cp *cp, struct sppp *sp) 1876 { 1877 STDDCL; 1878 1879 if (debug) 1880 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n", 1881 SPP_ARGS(ifp), cp->name, 1882 sppp_state_name(sp->state[cp->protoidx])); 1883 1884 switch (sp->state[cp->protoidx]) { 1885 case STATE_INITIAL: 1886 case STATE_CLOSED: 1887 case STATE_CLOSING: 1888 break; 1889 case STATE_STARTING: 1890 (cp->tlf)(sp); 1891 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1892 break; 1893 case STATE_STOPPED: 1894 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1895 break; 1896 case STATE_STOPPING: 1897 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1898 break; 1899 case STATE_OPENED: 1900 (cp->tld)(sp); 1901 /* fall through */ 1902 case STATE_REQ_SENT: 1903 case STATE_ACK_RCVD: 1904 case STATE_ACK_SENT: 1905 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 1906 sppp_cp_send(sp, cp->proto, TERM_REQ, 1907 ++sp->pp_seq[cp->protoidx], 0, 0); 1908 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1909 break; 1910 } 1911 } 1912 1913 static void 1914 sppp_to_event(const struct cp *cp, struct sppp *sp) 1915 { 1916 STDDCL; 1917 int s; 1918 1919 s = splnet(); 1920 if (debug) 1921 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n", 1922 SPP_ARGS(ifp), cp->name, 1923 sppp_state_name(sp->state[cp->protoidx]), 1924 sp->rst_counter[cp->protoidx]); 1925 1926 if (--sp->rst_counter[cp->protoidx] < 0) 1927 /* TO- event */ 1928 switch (sp->state[cp->protoidx]) { 1929 case STATE_CLOSING: 1930 (cp->tlf)(sp); 1931 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1932 sppp_lcp_check_and_close(sp); 1933 break; 1934 case STATE_STOPPING: 1935 (cp->tlf)(sp); 1936 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1937 sppp_lcp_check_and_close(sp); 1938 break; 1939 case STATE_REQ_SENT: 1940 case STATE_ACK_RCVD: 1941 case STATE_ACK_SENT: 1942 (cp->tlf)(sp); 1943 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1944 sppp_lcp_check_and_close(sp); 1945 break; 1946 } 1947 else 1948 /* TO+ event */ 1949 switch (sp->state[cp->protoidx]) { 1950 case STATE_CLOSING: 1951 case STATE_STOPPING: 1952 sppp_cp_send(sp, cp->proto, TERM_REQ, 1953 ++sp->pp_seq[cp->protoidx], 0, 0); 1954 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1955 cp->TO, sp); 1956 break; 1957 case STATE_REQ_SENT: 1958 case STATE_ACK_RCVD: 1959 (cp->scr)(sp); 1960 /* sppp_cp_change_state() will restart the timer */ 1961 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1962 break; 1963 case STATE_ACK_SENT: 1964 (cp->scr)(sp); 1965 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1966 cp->TO, sp); 1967 break; 1968 } 1969 1970 splx(s); 1971 } 1972 1973 /* 1974 * Change the state of a control protocol in the state automaton. 1975 * Takes care of starting/stopping the restart timer. 1976 */ 1977 void 1978 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 1979 { 1980 sp->state[cp->protoidx] = newstate; 1981 callout_stop(&sp->ch[cp->protoidx]); 1982 switch (newstate) { 1983 case STATE_INITIAL: 1984 case STATE_STARTING: 1985 case STATE_CLOSED: 1986 case STATE_STOPPED: 1987 case STATE_OPENED: 1988 break; 1989 case STATE_CLOSING: 1990 case STATE_STOPPING: 1991 case STATE_REQ_SENT: 1992 case STATE_ACK_RCVD: 1993 case STATE_ACK_SENT: 1994 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1995 cp->TO, sp); 1996 break; 1997 } 1998 } 1999 2000 /* 2001 *--------------------------------------------------------------------------* 2002 * * 2003 * The LCP implementation. * 2004 * * 2005 *--------------------------------------------------------------------------* 2006 */ 2007 static void 2008 sppp_lcp_init(struct sppp *sp) 2009 { 2010 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 2011 sp->lcp.magic = 0; 2012 sp->state[IDX_LCP] = STATE_INITIAL; 2013 sp->fail_counter[IDX_LCP] = 0; 2014 sp->pp_seq[IDX_LCP] = 0; 2015 sp->pp_rseq[IDX_LCP] = 0; 2016 sp->lcp.protos = 0; 2017 sp->lcp.mru = sp->lcp.their_mru = PP_MTU; 2018 2019 /* 2020 * Initialize counters and timeout values. Note that we don't 2021 * use the 3 seconds suggested in RFC 1661 since we are likely 2022 * running on a fast link. XXX We should probably implement 2023 * the exponential backoff option. Note that these values are 2024 * relevant for all control protocols, not just LCP only. 2025 */ 2026 sp->lcp.timeout = 1 * hz; 2027 sp->lcp.max_terminate = 2; 2028 sp->lcp.max_configure = 10; 2029 sp->lcp.max_failure = 10; 2030 callout_init(&sp->ch[IDX_LCP]); 2031 } 2032 2033 static void 2034 sppp_lcp_up(struct sppp *sp) 2035 { 2036 STDDCL; 2037 2038 /* Initialize activity timestamp: opening a connection is an activity */ 2039 sp->pp_last_activity = mono_time.tv_sec; 2040 2041 /* 2042 * If this interface is passive or dial-on-demand, and we are 2043 * still in Initial state, it means we've got an incoming 2044 * call. Activate the interface. 2045 */ 2046 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2047 if (debug) 2048 log(LOG_DEBUG, 2049 SPP_FMT "Up event", SPP_ARGS(ifp)); 2050 ifp->if_flags |= IFF_RUNNING; 2051 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2052 if (debug) 2053 addlog("(incoming call)\n"); 2054 sp->pp_flags |= PP_CALLIN; 2055 lcp.Open(sp); 2056 } else if (debug) 2057 addlog("\n"); 2058 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && 2059 (sp->state[IDX_LCP] == STATE_INITIAL)) { 2060 ifp->if_flags |= IFF_RUNNING; 2061 lcp.Open(sp); 2062 } 2063 2064 sppp_up_event(&lcp, sp); 2065 } 2066 2067 static void 2068 sppp_lcp_down(struct sppp *sp) 2069 { 2070 STDDCL; 2071 2072 sppp_down_event(&lcp, sp); 2073 2074 /* 2075 * If this is neither a dial-on-demand nor a passive 2076 * interface, simulate an ``ifconfig down'' action, so the 2077 * administrator can force a redial by another ``ifconfig 2078 * up''. XXX For leased line operation, should we immediately 2079 * try to reopen the connection here? 2080 */ 2081 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2082 if (debug) 2083 log(LOG_INFO, 2084 SPP_FMT "Down event (carrier loss), taking interface down.\n", 2085 SPP_ARGS(ifp)); 2086 if_down(ifp); 2087 } else { 2088 if (debug) 2089 log(LOG_DEBUG, 2090 SPP_FMT "Down event (carrier loss)\n", 2091 SPP_ARGS(ifp)); 2092 } 2093 sp->pp_flags &= ~PP_CALLIN; 2094 if (sp->state[IDX_LCP] != STATE_INITIAL) 2095 lcp.Close(sp); 2096 ifp->if_flags &= ~IFF_RUNNING; 2097 } 2098 2099 static void 2100 sppp_lcp_open(struct sppp *sp) 2101 { 2102 /* 2103 * If we are authenticator, negotiate LCP_AUTH 2104 */ 2105 if (sp->hisauth.proto != 0) 2106 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2107 else 2108 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2109 sp->pp_flags &= ~PP_NEEDAUTH; 2110 sppp_open_event(&lcp, sp); 2111 } 2112 2113 static void 2114 sppp_lcp_close(struct sppp *sp) 2115 { 2116 sppp_close_event(&lcp, sp); 2117 } 2118 2119 static void 2120 sppp_lcp_TO(void *cookie) 2121 { 2122 sppp_to_event(&lcp, (struct sppp *)cookie); 2123 } 2124 2125 /* 2126 * Analyze a configure request. Return true if it was agreeable, and 2127 * caused action sca, false if it has been rejected or nak'ed, and 2128 * caused action scn. (The return value is used to make the state 2129 * transition decision in the state automaton.) 2130 */ 2131 static int 2132 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2133 { 2134 STDDCL; 2135 u_char *buf, *r, *p; 2136 int origlen, rlen; 2137 u_int32_t nmagic; 2138 u_short authproto; 2139 2140 len -= 4; 2141 origlen = len; 2142 buf = r = malloc (len, M_TEMP, M_NOWAIT); 2143 if (! buf) 2144 return (0); 2145 2146 if (debug) 2147 log(LOG_DEBUG, SPP_FMT "lcp parse opts:", 2148 SPP_ARGS(ifp)); 2149 2150 /* pass 1: check for things that need to be rejected */ 2151 p = (void *)(h + 1); 2152 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2153 if (debug) 2154 addlog(" %s", sppp_lcp_opt_name(*p)); 2155 switch (*p) { 2156 case LCP_OPT_MAGIC: 2157 /* Magic number. */ 2158 /* fall through, both are same length */ 2159 case LCP_OPT_ASYNC_MAP: 2160 /* Async control character map. */ 2161 if (len >= 6 || p[1] == 6) 2162 continue; 2163 if (debug) 2164 addlog(" [invalid]"); 2165 break; 2166 case LCP_OPT_MRU: 2167 /* Maximum receive unit. */ 2168 if (len >= 4 && p[1] == 4) 2169 continue; 2170 if (debug) 2171 addlog(" [invalid]"); 2172 break; 2173 case LCP_OPT_AUTH_PROTO: 2174 if (len < 4) { 2175 if (debug) 2176 addlog(" [invalid]"); 2177 break; 2178 } 2179 authproto = (p[2] << 8) + p[3]; 2180 if (authproto == PPP_CHAP && p[1] != 5) { 2181 if (debug) 2182 addlog(" [invalid chap len]"); 2183 break; 2184 } 2185 if (sp->myauth.proto == 0) { 2186 /* we are not configured to do auth */ 2187 if (debug) 2188 addlog(" [not configured]"); 2189 break; 2190 } 2191 /* 2192 * Remote want us to authenticate, remember this, 2193 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2194 * up. 2195 */ 2196 sp->pp_flags |= PP_NEEDAUTH; 2197 continue; 2198 default: 2199 /* Others not supported. */ 2200 if (debug) 2201 addlog(" [rej]"); 2202 break; 2203 } 2204 /* Add the option to rejected list. */ 2205 bcopy (p, r, p[1]); 2206 r += p[1]; 2207 rlen += p[1]; 2208 } 2209 if (rlen) { 2210 if (debug) 2211 addlog(" send conf-rej\n"); 2212 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2213 goto end; 2214 } else if (debug) 2215 addlog("\n"); 2216 2217 /* 2218 * pass 2: check for option values that are unacceptable and 2219 * thus require to be nak'ed. 2220 */ 2221 if (debug) 2222 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ", 2223 SPP_ARGS(ifp)); 2224 2225 p = (void *)(h + 1); 2226 len = origlen; 2227 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2228 if (debug) 2229 addlog(" %s", sppp_lcp_opt_name(*p)); 2230 switch (*p) { 2231 case LCP_OPT_MAGIC: 2232 /* Magic number -- extract. */ 2233 nmagic = (u_int32_t)p[2] << 24 | 2234 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2235 if (nmagic != sp->lcp.magic) { 2236 if (debug) 2237 addlog(" 0x%x", nmagic); 2238 continue; 2239 } 2240 /* 2241 * Local and remote magics equal -- loopback? 2242 */ 2243 if (sp->pp_loopcnt >= MAXALIVECNT*5) { 2244 printf (SPP_FMT "loopback\n", 2245 SPP_ARGS(ifp)); 2246 sp->pp_loopcnt = 0; 2247 if (ifp->if_flags & IFF_UP) { 2248 if_down(ifp); 2249 IF_PURGE(&sp->pp_cpq); 2250 /* XXX ? */ 2251 lcp.Down(sp); 2252 lcp.Up(sp); 2253 } 2254 } else if (debug) 2255 addlog(" [glitch]"); 2256 ++sp->pp_loopcnt; 2257 /* 2258 * We negate our magic here, and NAK it. If 2259 * we see it later in an NAK packet, we 2260 * suggest a new one. 2261 */ 2262 nmagic = ~sp->lcp.magic; 2263 /* Gonna NAK it. */ 2264 p[2] = nmagic >> 24; 2265 p[3] = nmagic >> 16; 2266 p[4] = nmagic >> 8; 2267 p[5] = nmagic; 2268 break; 2269 2270 case LCP_OPT_ASYNC_MAP: 2271 /* 2272 * Async control character map -- just ignore it. 2273 * 2274 * Quote from RFC 1662, chapter 6: 2275 * To enable this functionality, synchronous PPP 2276 * implementations MUST always respond to the 2277 * Async-Control-Character-Map Configuration 2278 * Option with the LCP Configure-Ack. However, 2279 * acceptance of the Configuration Option does 2280 * not imply that the synchronous implementation 2281 * will do any ACCM mapping. Instead, all such 2282 * octet mapping will be performed by the 2283 * asynchronous-to-synchronous converter. 2284 */ 2285 continue; 2286 2287 case LCP_OPT_MRU: 2288 /* 2289 * Maximum receive unit. Always agreeable, 2290 * but ignored by now. 2291 */ 2292 sp->lcp.their_mru = p[2] * 256 + p[3]; 2293 if (debug) 2294 addlog(" %ld", sp->lcp.their_mru); 2295 continue; 2296 2297 case LCP_OPT_AUTH_PROTO: 2298 authproto = (p[2] << 8) + p[3]; 2299 if (sp->myauth.proto != authproto) { 2300 /* not agreed, nak */ 2301 if (debug) 2302 addlog(" [mine %s != his %s]", 2303 sppp_proto_name(sp->hisauth.proto), 2304 sppp_proto_name(authproto)); 2305 p[2] = sp->myauth.proto >> 8; 2306 p[3] = sp->myauth.proto; 2307 break; 2308 } 2309 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2310 if (debug) 2311 addlog(" [chap not MD5]"); 2312 p[4] = CHAP_MD5; 2313 break; 2314 } 2315 continue; 2316 } 2317 /* Add the option to nak'ed list. */ 2318 bcopy (p, r, p[1]); 2319 r += p[1]; 2320 rlen += p[1]; 2321 } 2322 if (rlen) { 2323 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2324 if (debug) 2325 addlog(" max_failure (%d) exceeded, " 2326 "send conf-rej\n", 2327 sp->lcp.max_failure); 2328 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2329 } else { 2330 if (debug) 2331 addlog(" send conf-nak\n"); 2332 sppp_cp_send(sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2333 } 2334 goto end; 2335 } else { 2336 if (debug) 2337 addlog(" send conf-ack\n"); 2338 sp->fail_counter[IDX_LCP] = 0; 2339 sp->pp_loopcnt = 0; 2340 sppp_cp_send(sp, PPP_LCP, CONF_ACK, h->ident, origlen, h + 1); 2341 } 2342 2343 end: 2344 free(buf, M_TEMP); 2345 return (rlen == 0); 2346 } 2347 2348 /* 2349 * Analyze the LCP Configure-Reject option list, and adjust our 2350 * negotiation. 2351 */ 2352 static void 2353 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2354 { 2355 STDDCL; 2356 u_char *buf, *p; 2357 2358 len -= 4; 2359 buf = malloc (len, M_TEMP, M_NOWAIT); 2360 if (!buf) 2361 return; 2362 2363 if (debug) 2364 log(LOG_DEBUG, SPP_FMT "lcp rej opts:", 2365 SPP_ARGS(ifp)); 2366 2367 p = (void *)(h + 1); 2368 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2369 if (debug) 2370 addlog(" %s", sppp_lcp_opt_name(*p)); 2371 switch (*p) { 2372 case LCP_OPT_MAGIC: 2373 /* Magic number -- can't use it, use 0 */ 2374 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2375 sp->lcp.magic = 0; 2376 break; 2377 case LCP_OPT_MRU: 2378 /* 2379 * Should not be rejected anyway, since we only 2380 * negotiate a MRU if explicitly requested by 2381 * peer. 2382 */ 2383 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2384 break; 2385 case LCP_OPT_AUTH_PROTO: 2386 /* 2387 * Peer doesn't want to authenticate himself, 2388 * deny unless this is a dialout call, and 2389 * SPPP_AUTHFLAG_NOCALLOUT is set. 2390 */ 2391 if ((sp->pp_flags & PP_CALLIN) == 0 && 2392 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2393 if (debug) 2394 addlog(" [don't insist on auth " 2395 "for callout]"); 2396 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2397 break; 2398 } 2399 if (debug) 2400 addlog("[access denied]\n"); 2401 lcp.Close(sp); 2402 break; 2403 } 2404 } 2405 if (debug) 2406 addlog("\n"); 2407 free(buf, M_TEMP); 2408 return; 2409 } 2410 2411 /* 2412 * Analyze the LCP Configure-NAK option list, and adjust our 2413 * negotiation. 2414 */ 2415 static void 2416 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2417 { 2418 STDDCL; 2419 u_char *buf, *p; 2420 u_int32_t magic; 2421 2422 len -= 4; 2423 buf = malloc (len, M_TEMP, M_NOWAIT); 2424 if (!buf) 2425 return; 2426 2427 if (debug) 2428 log(LOG_DEBUG, SPP_FMT "lcp nak opts:", 2429 SPP_ARGS(ifp)); 2430 2431 p = (void *)(h + 1); 2432 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2433 if (debug) 2434 addlog(" %s", sppp_lcp_opt_name(*p)); 2435 switch (*p) { 2436 case LCP_OPT_MAGIC: 2437 /* Magic number -- renegotiate */ 2438 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2439 len >= 6 && p[1] == 6) { 2440 magic = (u_int32_t)p[2] << 24 | 2441 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2442 /* 2443 * If the remote magic is our negated one, 2444 * this looks like a loopback problem. 2445 * Suggest a new magic to make sure. 2446 */ 2447 if (magic == ~sp->lcp.magic) { 2448 if (debug) 2449 addlog(" magic glitch"); 2450 sp->lcp.magic = random(); 2451 } else { 2452 sp->lcp.magic = magic; 2453 if (debug) 2454 addlog(" %d", magic); 2455 } 2456 } 2457 break; 2458 case LCP_OPT_MRU: 2459 /* 2460 * Peer wants to advise us to negotiate an MRU. 2461 * Agree on it if it's reasonable, or use 2462 * default otherwise. 2463 */ 2464 if (len >= 4 && p[1] == 4) { 2465 u_int mru = p[2] * 256 + p[3]; 2466 if (debug) 2467 addlog(" %d", mru); 2468 if (mru < PP_MTU || mru > PP_MAX_MRU) 2469 mru = PP_MTU; 2470 sp->lcp.mru = mru; 2471 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2472 } 2473 break; 2474 case LCP_OPT_AUTH_PROTO: 2475 /* 2476 * Peer doesn't like our authentication method, 2477 * deny. 2478 */ 2479 if (debug) 2480 addlog("[access denied]\n"); 2481 lcp.Close(sp); 2482 break; 2483 } 2484 } 2485 if (debug) 2486 addlog("\n"); 2487 free(buf, M_TEMP); 2488 return; 2489 } 2490 2491 static void 2492 sppp_lcp_tlu(struct sppp *sp) 2493 { 2494 STDDCL; 2495 int i; 2496 u_int32_t mask; 2497 2498 /* XXX ? */ 2499 if (! (ifp->if_flags & IFF_UP) && 2500 (ifp->if_flags & IFF_RUNNING)) { 2501 /* Coming out of loopback mode. */ 2502 if_up(ifp); 2503 } 2504 2505 for (i = 0; i < IDX_COUNT; i++) 2506 if ((cps[i])->flags & CP_QUAL) 2507 (cps[i])->Open(sp); 2508 2509 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2510 (sp->pp_flags & PP_NEEDAUTH) != 0) 2511 sp->pp_phase = SPPP_PHASE_AUTHENTICATE; 2512 else 2513 sp->pp_phase = SPPP_PHASE_NETWORK; 2514 2515 if(debug) 2516 { 2517 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2518 sppp_phase_name(sp->pp_phase)); 2519 } 2520 2521 /* 2522 * Open all authentication protocols. This is even required 2523 * if we already proceeded to network phase, since it might be 2524 * that remote wants us to authenticate, so we might have to 2525 * send a PAP request. Undesired authentication protocols 2526 * don't do anything when they get an Open event. 2527 */ 2528 for (i = 0; i < IDX_COUNT; i++) 2529 if ((cps[i])->flags & CP_AUTH) 2530 (cps[i])->Open(sp); 2531 2532 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2533 /* Notify all NCPs. */ 2534 for (i = 0; i < IDX_COUNT; i++) 2535 if ((cps[i])->flags & CP_NCP) 2536 (cps[i])->Open(sp); 2537 } 2538 2539 /* Send Up events to all started protos. */ 2540 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2541 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) 2542 (cps[i])->Up(sp); 2543 2544 /* notify low-level driver of state change */ 2545 if (sp->pp_chg) 2546 sp->pp_chg(sp, (int)sp->pp_phase); 2547 2548 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2549 /* if no NCP is starting, close down */ 2550 sppp_lcp_check_and_close(sp); 2551 } 2552 2553 static void 2554 sppp_lcp_tld(struct sppp *sp) 2555 { 2556 STDDCL; 2557 int i; 2558 u_int32_t mask; 2559 2560 sp->pp_phase = SPPP_PHASE_TERMINATE; 2561 2562 if(debug) 2563 { 2564 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2565 sppp_phase_name(sp->pp_phase)); 2566 } 2567 2568 /* 2569 * Take upper layers down. We send the Down event first and 2570 * the Close second to prevent the upper layers from sending 2571 * ``a flurry of terminate-request packets'', as the RFC 2572 * describes it. 2573 */ 2574 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2575 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2576 (cps[i])->Down(sp); 2577 (cps[i])->Close(sp); 2578 } 2579 } 2580 2581 static void 2582 sppp_lcp_tls(struct sppp *sp) 2583 { 2584 STDDCL; 2585 2586 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2587 printf("%s: authentication failed %d times, not retrying again\n", 2588 sp->pp_if.if_xname, sp->pp_auth_failures); 2589 if_down(&sp->pp_if); 2590 return; 2591 } 2592 2593 sp->pp_phase = SPPP_PHASE_ESTABLISH; 2594 2595 if(debug) 2596 { 2597 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2598 sppp_phase_name(sp->pp_phase)); 2599 } 2600 2601 /* Notify lower layer if desired. */ 2602 if (sp->pp_tls) 2603 (sp->pp_tls)(sp); 2604 } 2605 2606 static void 2607 sppp_lcp_tlf(struct sppp *sp) 2608 { 2609 STDDCL; 2610 2611 sp->pp_phase = SPPP_PHASE_DEAD; 2612 2613 if(debug) 2614 { 2615 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2616 sppp_phase_name(sp->pp_phase)); 2617 } 2618 2619 /* Notify lower layer if desired. */ 2620 if (sp->pp_tlf) 2621 (sp->pp_tlf)(sp); 2622 } 2623 2624 static void 2625 sppp_lcp_scr(struct sppp *sp) 2626 { 2627 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2628 int i = 0; 2629 u_short authproto; 2630 2631 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2632 if (! sp->lcp.magic) 2633 sp->lcp.magic = random(); 2634 opt[i++] = LCP_OPT_MAGIC; 2635 opt[i++] = 6; 2636 opt[i++] = sp->lcp.magic >> 24; 2637 opt[i++] = sp->lcp.magic >> 16; 2638 opt[i++] = sp->lcp.magic >> 8; 2639 opt[i++] = sp->lcp.magic; 2640 } 2641 2642 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2643 opt[i++] = LCP_OPT_MRU; 2644 opt[i++] = 4; 2645 opt[i++] = sp->lcp.mru >> 8; 2646 opt[i++] = sp->lcp.mru; 2647 } 2648 2649 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2650 authproto = sp->hisauth.proto; 2651 opt[i++] = LCP_OPT_AUTH_PROTO; 2652 opt[i++] = authproto == PPP_CHAP? 5: 4; 2653 opt[i++] = authproto >> 8; 2654 opt[i++] = authproto; 2655 if (authproto == PPP_CHAP) 2656 opt[i++] = CHAP_MD5; 2657 } 2658 2659 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2660 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2661 } 2662 2663 /* 2664 * Check the open NCPs, return true if at least one NCP is open. 2665 */ 2666 static int 2667 sppp_ncp_check(struct sppp *sp) 2668 { 2669 int i, mask; 2670 2671 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2672 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2673 return 1; 2674 return 0; 2675 } 2676 2677 /* 2678 * Re-check the open NCPs and see if we should terminate the link. 2679 * Called by the NCPs during their tlf action handling. 2680 */ 2681 static void 2682 sppp_lcp_check_and_close(struct sppp *sp) 2683 { 2684 2685 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2686 /* don't bother, we are already going down */ 2687 return; 2688 2689 if (sppp_ncp_check(sp)) 2690 return; 2691 2692 lcp.Close(sp); 2693 } 2694 2695 2696 /* 2697 *--------------------------------------------------------------------------* 2698 * * 2699 * The IPCP implementation. * 2700 * * 2701 *--------------------------------------------------------------------------* 2702 */ 2703 2704 static void 2705 sppp_ipcp_init(struct sppp *sp) 2706 { 2707 sp->ipcp.opts = 0; 2708 sp->ipcp.flags = 0; 2709 sp->state[IDX_IPCP] = STATE_INITIAL; 2710 sp->fail_counter[IDX_IPCP] = 0; 2711 sp->pp_seq[IDX_IPCP] = 0; 2712 sp->pp_rseq[IDX_IPCP] = 0; 2713 callout_init(&sp->ch[IDX_IPCP]); 2714 } 2715 2716 static void 2717 sppp_ipcp_up(struct sppp *sp) 2718 { 2719 sppp_up_event(&ipcp, sp); 2720 } 2721 2722 static void 2723 sppp_ipcp_down(struct sppp *sp) 2724 { 2725 sppp_down_event(&ipcp, sp); 2726 } 2727 2728 static void 2729 sppp_ipcp_open(struct sppp *sp) 2730 { 2731 STDDCL; 2732 u_int32_t myaddr, hisaddr; 2733 2734 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 2735 sp->ipcp.req_myaddr = 0; 2736 sp->ipcp.req_hisaddr = 0; 2737 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 2738 2739 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 2740 /* 2741 * If we don't have his address, this probably means our 2742 * interface doesn't want to talk IP at all. (This could 2743 * be the case if somebody wants to speak only IPX, for 2744 * example.) Don't open IPCP in this case. 2745 */ 2746 if (hisaddr == 0L) { 2747 /* XXX this message should go away */ 2748 if (debug) 2749 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n", 2750 SPP_ARGS(ifp)); 2751 return; 2752 } 2753 2754 if (myaddr == 0) { 2755 /* 2756 * I don't have an assigned address, so i need to 2757 * negotiate my address. 2758 */ 2759 sp->ipcp.flags |= IPCP_MYADDR_DYN; 2760 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2761 } 2762 if (hisaddr == 1) { 2763 /* 2764 * XXX - remove this hack! 2765 * remote has no valid adress, we need to get one assigned. 2766 */ 2767 sp->ipcp.flags |= IPCP_HISADDR_DYN; 2768 } 2769 sppp_open_event(&ipcp, sp); 2770 } 2771 2772 static void 2773 sppp_ipcp_close(struct sppp *sp) 2774 { 2775 sppp_close_event(&ipcp, sp); 2776 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 2777 /* 2778 * Some address was dynamic, clear it again. 2779 */ 2780 sppp_clear_ip_addrs(sp); 2781 } 2782 2783 static void 2784 sppp_ipcp_TO(void *cookie) 2785 { 2786 sppp_to_event(&ipcp, (struct sppp *)cookie); 2787 } 2788 2789 /* 2790 * Analyze a configure request. Return true if it was agreeable, and 2791 * caused action sca, false if it has been rejected or nak'ed, and 2792 * caused action scn. (The return value is used to make the state 2793 * transition decision in the state automaton.) 2794 */ 2795 static int 2796 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2797 { 2798 u_char *buf, *r, *p; 2799 struct ifnet *ifp = &sp->pp_if; 2800 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 2801 u_int32_t hisaddr, desiredaddr; 2802 2803 len -= 4; 2804 origlen = len; 2805 /* 2806 * Make sure to allocate a buf that can at least hold a 2807 * conf-nak with an `address' option. We might need it below. 2808 */ 2809 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 2810 if (! buf) 2811 return (0); 2812 2813 /* pass 1: see if we can recognize them */ 2814 if (debug) 2815 log(LOG_DEBUG, SPP_FMT "ipcp parse opts:", 2816 SPP_ARGS(ifp)); 2817 p = (void *)(h + 1); 2818 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2819 if (debug) 2820 addlog(" %s", sppp_ipcp_opt_name(*p)); 2821 switch (*p) { 2822 #ifdef notyet 2823 case IPCP_OPT_COMPRESSION: 2824 if (len >= 6 && p[1] >= 6) { 2825 /* correctly formed compress option */ 2826 continue; 2827 } 2828 if (debug) 2829 addlog(" [invalid]"); 2830 break; 2831 #endif 2832 case IPCP_OPT_ADDRESS: 2833 if (len >= 6 && p[1] == 6) { 2834 /* correctly formed address option */ 2835 continue; 2836 } 2837 if (debug) 2838 addlog(" [invalid]"); 2839 break; 2840 default: 2841 /* Others not supported. */ 2842 if (debug) 2843 addlog(" [rej]"); 2844 break; 2845 } 2846 /* Add the option to rejected list. */ 2847 bcopy (p, r, p[1]); 2848 r += p[1]; 2849 rlen += p[1]; 2850 } 2851 if (rlen) { 2852 if (debug) 2853 addlog(" send conf-rej\n"); 2854 sppp_cp_send(sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 2855 goto end; 2856 } else if (debug) 2857 addlog("\n"); 2858 2859 /* pass 2: parse option values */ 2860 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 2861 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 2862 else 2863 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 2864 if (debug) 2865 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ", 2866 SPP_ARGS(ifp)); 2867 p = (void *)(h + 1); 2868 len = origlen; 2869 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2870 if (debug) 2871 addlog(" %s", sppp_ipcp_opt_name(*p)); 2872 switch (*p) { 2873 #ifdef notyet 2874 case IPCP_OPT_COMPRESSION: 2875 continue; 2876 #endif 2877 case IPCP_OPT_ADDRESS: 2878 desiredaddr = p[2] << 24 | p[3] << 16 | 2879 p[4] << 8 | p[5]; 2880 if (desiredaddr == hisaddr || 2881 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 2882 /* 2883 * Peer's address is same as our value, 2884 * this is agreeable. Gonna conf-ack 2885 * it. 2886 */ 2887 if (debug) 2888 addlog(" %s [ack]", 2889 sppp_dotted_quad(hisaddr)); 2890 /* record that we've seen it already */ 2891 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 2892 sp->ipcp.req_hisaddr = desiredaddr; 2893 hisaddr = desiredaddr; 2894 continue; 2895 } 2896 /* 2897 * The address wasn't agreeable. This is either 2898 * he sent us 0.0.0.0, asking to assign him an 2899 * address, or he send us another address not 2900 * matching our value. Either case, we gonna 2901 * conf-nak it with our value. 2902 */ 2903 if (debug) { 2904 if (desiredaddr == 0) 2905 addlog(" [addr requested]"); 2906 else 2907 addlog(" %s [not agreed]", 2908 sppp_dotted_quad(desiredaddr)); 2909 } 2910 2911 p[2] = hisaddr >> 24; 2912 p[3] = hisaddr >> 16; 2913 p[4] = hisaddr >> 8; 2914 p[5] = hisaddr; 2915 break; 2916 } 2917 /* Add the option to nak'ed list. */ 2918 bcopy (p, r, p[1]); 2919 r += p[1]; 2920 rlen += p[1]; 2921 } 2922 2923 /* 2924 * If we are about to conf-ack the request, but haven't seen 2925 * his address so far, gonna conf-nak it instead, with the 2926 * `address' option present and our idea of his address being 2927 * filled in there, to request negotiation of both addresses. 2928 * 2929 * XXX This can result in an endless req - nak loop if peer 2930 * doesn't want to send us his address. Q: What should we do 2931 * about it? XXX A: implement the max-failure counter. 2932 */ 2933 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 2934 buf[0] = IPCP_OPT_ADDRESS; 2935 buf[1] = 6; 2936 buf[2] = hisaddr >> 24; 2937 buf[3] = hisaddr >> 16; 2938 buf[4] = hisaddr >> 8; 2939 buf[5] = hisaddr; 2940 rlen = 6; 2941 if (debug) 2942 addlog(" still need hisaddr"); 2943 } 2944 2945 if (rlen) { 2946 if (debug) 2947 addlog(" send conf-nak\n"); 2948 sppp_cp_send(sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 2949 } else { 2950 if (debug) 2951 addlog(" send conf-ack\n"); 2952 sppp_cp_send(sp, PPP_IPCP, CONF_ACK, h->ident, origlen, h + 1); 2953 } 2954 2955 end: 2956 free(buf, M_TEMP); 2957 return (rlen == 0); 2958 } 2959 2960 /* 2961 * Analyze the IPCP Configure-Reject option list, and adjust our 2962 * negotiation. 2963 */ 2964 static void 2965 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2966 { 2967 u_char *buf, *p; 2968 struct ifnet *ifp = &sp->pp_if; 2969 int debug = ifp->if_flags & IFF_DEBUG; 2970 2971 len -= 4; 2972 buf = malloc (len, M_TEMP, M_NOWAIT); 2973 if (!buf) 2974 return; 2975 2976 if (debug) 2977 log(LOG_DEBUG, SPP_FMT "ipcp rej opts:", 2978 SPP_ARGS(ifp)); 2979 2980 p = (void *)(h + 1); 2981 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2982 if (debug) 2983 addlog(" %s", sppp_ipcp_opt_name(*p)); 2984 switch (*p) { 2985 case IPCP_OPT_ADDRESS: 2986 /* 2987 * Peer doesn't grok address option. This is 2988 * bad. XXX Should we better give up here? 2989 */ 2990 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 2991 break; 2992 #ifdef notyet 2993 case IPCP_OPT_COMPRESS: 2994 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 2995 break; 2996 #endif 2997 } 2998 } 2999 if (debug) 3000 addlog("\n"); 3001 free(buf, M_TEMP); 3002 return; 3003 } 3004 3005 /* 3006 * Analyze the IPCP Configure-NAK option list, and adjust our 3007 * negotiation. 3008 */ 3009 static void 3010 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3011 { 3012 u_char *p; 3013 struct ifnet *ifp = &sp->pp_if; 3014 int debug = ifp->if_flags & IFF_DEBUG; 3015 u_int32_t wantaddr; 3016 3017 len -= 4; 3018 3019 if (debug) 3020 log(LOG_DEBUG, SPP_FMT "ipcp nak opts:", 3021 SPP_ARGS(ifp)); 3022 3023 p = (void *)(h + 1); 3024 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3025 if (debug) 3026 addlog(" %s", sppp_ipcp_opt_name(*p)); 3027 switch (*p) { 3028 case IPCP_OPT_ADDRESS: 3029 /* 3030 * Peer doesn't like our local IP address. See 3031 * if we can do something for him. We'll drop 3032 * him our address then. 3033 */ 3034 if (len >= 6 && p[1] == 6) { 3035 wantaddr = p[2] << 24 | p[3] << 16 | 3036 p[4] << 8 | p[5]; 3037 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3038 if (debug) 3039 addlog(" [wantaddr %s]", 3040 sppp_dotted_quad(wantaddr)); 3041 /* 3042 * When doing dynamic address assignment, 3043 * we accept his offer. Otherwise, we 3044 * ignore it and thus continue to negotiate 3045 * our already existing value. 3046 */ 3047 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3048 if (debug) 3049 addlog(" [agree]"); 3050 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3051 sp->ipcp.req_myaddr = wantaddr; 3052 } 3053 } 3054 break; 3055 3056 case IPCP_OPT_PRIMDNS: 3057 if (len >= 6 && p[1] == 6) { 3058 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3059 p[4] << 8 | p[5]; 3060 } 3061 break; 3062 3063 case IPCP_OPT_SECDNS: 3064 if (len >= 6 && p[1] == 6) { 3065 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3066 p[4] << 8 | p[5]; 3067 } 3068 break; 3069 #ifdef notyet 3070 case IPCP_OPT_COMPRESS: 3071 /* 3072 * Peer wants different compression parameters. 3073 */ 3074 break; 3075 #endif 3076 } 3077 } 3078 if (debug) 3079 addlog("\n"); 3080 return; 3081 } 3082 3083 static void 3084 sppp_ipcp_tlu(struct sppp *sp) 3085 { 3086 /* we are up. Set addresses and notify anyone interested */ 3087 u_int32_t myaddr, hisaddr; 3088 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3089 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 3090 myaddr = sp->ipcp.req_myaddr; 3091 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 3092 hisaddr = sp->ipcp.req_hisaddr; 3093 sppp_set_ip_addrs(sp, myaddr, hisaddr); 3094 if (sp->pp_con) 3095 sp->pp_con(sp); 3096 } 3097 3098 static void 3099 sppp_ipcp_tld(struct sppp *sp) 3100 { 3101 } 3102 3103 static void 3104 sppp_ipcp_tls(struct sppp *sp) 3105 { 3106 /* indicate to LCP that it must stay alive */ 3107 sp->lcp.protos |= (1 << IDX_IPCP); 3108 } 3109 3110 static void 3111 sppp_ipcp_tlf(struct sppp *sp) 3112 { 3113 /* we no longer need LCP */ 3114 sp->lcp.protos &= ~(1 << IDX_IPCP); 3115 } 3116 3117 static void 3118 sppp_ipcp_scr(struct sppp *sp) 3119 { 3120 char opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3121 u_int32_t ouraddr; 3122 int i = 0; 3123 3124 #ifdef notyet 3125 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3126 opt[i++] = IPCP_OPT_COMPRESSION; 3127 opt[i++] = 6; 3128 opt[i++] = 0; /* VJ header compression */ 3129 opt[i++] = 0x2d; /* VJ header compression */ 3130 opt[i++] = max_slot_id; 3131 opt[i++] = comp_slot_id; 3132 } 3133 #endif 3134 3135 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3136 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3137 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3138 else 3139 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3140 opt[i++] = IPCP_OPT_ADDRESS; 3141 opt[i++] = 6; 3142 opt[i++] = ouraddr >> 24; 3143 opt[i++] = ouraddr >> 16; 3144 opt[i++] = ouraddr >> 8; 3145 opt[i++] = ouraddr; 3146 } 3147 3148 if (sp->query_dns & 1) { 3149 opt[i++] = IPCP_OPT_PRIMDNS; 3150 opt[i++] = 6; 3151 opt[i++] = sp->dns_addrs[0] >> 24; 3152 opt[i++] = sp->dns_addrs[0] >> 16; 3153 opt[i++] = sp->dns_addrs[0] >> 8; 3154 opt[i++] = sp->dns_addrs[0]; 3155 } 3156 if (sp->query_dns & 2) { 3157 opt[i++] = IPCP_OPT_SECDNS; 3158 opt[i++] = 6; 3159 opt[i++] = sp->dns_addrs[1] >> 24; 3160 opt[i++] = sp->dns_addrs[1] >> 16; 3161 opt[i++] = sp->dns_addrs[1] >> 8; 3162 opt[i++] = sp->dns_addrs[1]; 3163 } 3164 3165 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3166 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3167 } 3168 3169 3170 /* 3171 *--------------------------------------------------------------------------* 3172 * * 3173 * The IPv6CP implementation. * 3174 * * 3175 *--------------------------------------------------------------------------* 3176 */ 3177 3178 #ifdef INET6 3179 static void 3180 sppp_ipv6cp_init(struct sppp *sp) 3181 { 3182 sp->ipv6cp.opts = 0; 3183 sp->ipv6cp.flags = 0; 3184 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3185 sp->fail_counter[IDX_IPV6CP] = 0; 3186 sp->pp_seq[IDX_IPV6CP] = 0; 3187 sp->pp_rseq[IDX_IPV6CP] = 0; 3188 callout_init(&sp->ch[IDX_IPV6CP]); 3189 } 3190 3191 static void 3192 sppp_ipv6cp_up(struct sppp *sp) 3193 { 3194 sppp_up_event(&ipv6cp, sp); 3195 } 3196 3197 static void 3198 sppp_ipv6cp_down(struct sppp *sp) 3199 { 3200 sppp_down_event(&ipv6cp, sp); 3201 } 3202 3203 static void 3204 sppp_ipv6cp_open(struct sppp *sp) 3205 { 3206 STDDCL; 3207 struct in6_addr myaddr, hisaddr; 3208 3209 #ifdef IPV6CP_MYIFID_DYN 3210 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3211 #else 3212 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3213 #endif 3214 3215 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3216 /* 3217 * If we don't have our address, this probably means our 3218 * interface doesn't want to talk IPv6 at all. (This could 3219 * be the case if somebody wants to speak only IPX, for 3220 * example.) Don't open IPv6CP in this case. 3221 */ 3222 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3223 /* XXX this message should go away */ 3224 if (debug) 3225 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n", 3226 SPP_ARGS(ifp)); 3227 return; 3228 } 3229 3230 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3231 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3232 sppp_open_event(&ipv6cp, sp); 3233 } 3234 3235 static void 3236 sppp_ipv6cp_close(struct sppp *sp) 3237 { 3238 sppp_close_event(&ipv6cp, sp); 3239 } 3240 3241 static void 3242 sppp_ipv6cp_TO(void *cookie) 3243 { 3244 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3245 } 3246 3247 /* 3248 * Analyze a configure request. Return true if it was agreeable, and 3249 * caused action sca, false if it has been rejected or nak'ed, and 3250 * caused action scn. (The return value is used to make the state 3251 * transition decision in the state automaton.) 3252 */ 3253 static int 3254 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3255 { 3256 u_char *buf, *r, *p; 3257 struct ifnet *ifp = &sp->pp_if; 3258 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3259 struct in6_addr myaddr, desiredaddr, suggestaddr; 3260 int ifidcount; 3261 int type; 3262 int collision, nohisaddr; 3263 3264 len -= 4; 3265 origlen = len; 3266 /* 3267 * Make sure to allocate a buf that can at least hold a 3268 * conf-nak with an `address' option. We might need it below. 3269 */ 3270 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 3271 if (! buf) 3272 return (0); 3273 3274 /* pass 1: see if we can recognize them */ 3275 if (debug) 3276 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:", 3277 SPP_ARGS(ifp)); 3278 p = (void *)(h + 1); 3279 ifidcount = 0; 3280 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3281 if (debug) 3282 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3283 switch (*p) { 3284 case IPV6CP_OPT_IFID: 3285 if (len >= 10 && p[1] == 10 && ifidcount == 0) { 3286 /* correctly formed address option */ 3287 ifidcount++; 3288 continue; 3289 } 3290 if (debug) 3291 addlog(" [invalid]"); 3292 break; 3293 #ifdef notyet 3294 case IPV6CP_OPT_COMPRESSION: 3295 if (len >= 4 && p[1] >= 4) { 3296 /* correctly formed compress option */ 3297 continue; 3298 } 3299 if (debug) 3300 addlog(" [invalid]"); 3301 break; 3302 #endif 3303 default: 3304 /* Others not supported. */ 3305 if (debug) 3306 addlog(" [rej]"); 3307 break; 3308 } 3309 /* Add the option to rejected list. */ 3310 bcopy (p, r, p[1]); 3311 r += p[1]; 3312 rlen += p[1]; 3313 } 3314 if (rlen) { 3315 if (debug) 3316 addlog(" send conf-rej\n"); 3317 sppp_cp_send(sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3318 goto end; 3319 } else if (debug) 3320 addlog("\n"); 3321 3322 /* pass 2: parse option values */ 3323 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3324 if (debug) 3325 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ", 3326 SPP_ARGS(ifp)); 3327 p = (void *)(h + 1); 3328 len = origlen; 3329 type = CONF_ACK; 3330 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3331 if (debug) 3332 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3333 switch (*p) { 3334 #ifdef notyet 3335 case IPV6CP_OPT_COMPRESSION: 3336 continue; 3337 #endif 3338 case IPV6CP_OPT_IFID: 3339 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3340 bcopy(&p[2], &desiredaddr.s6_addr[8], 8); 3341 collision = (memcmp(&desiredaddr.s6_addr[8], 3342 &myaddr.s6_addr[8], 8) == 0); 3343 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3344 3345 desiredaddr.s6_addr16[0] = htons(0xfe80); 3346 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3347 3348 if (!collision && !nohisaddr) { 3349 /* no collision, hisaddr known - Conf-Ack */ 3350 type = CONF_ACK; 3351 3352 if (debug) { 3353 addlog(" %s [%s]", 3354 ip6_sprintf(&desiredaddr), 3355 sppp_cp_type_name(type)); 3356 } 3357 continue; 3358 } 3359 3360 memset(&suggestaddr, 0, sizeof(&suggestaddr)); 3361 if (collision && nohisaddr) { 3362 /* collision, hisaddr unknown - Conf-Rej */ 3363 type = CONF_REJ; 3364 memset(&p[2], 0, 8); 3365 } else { 3366 /* 3367 * - no collision, hisaddr unknown, or 3368 * - collision, hisaddr known 3369 * Conf-Nak, suggest hisaddr 3370 */ 3371 type = CONF_NAK; 3372 sppp_suggest_ip6_addr(sp, &suggestaddr); 3373 bcopy(&suggestaddr.s6_addr[8], &p[2], 8); 3374 } 3375 if (debug) 3376 addlog(" %s [%s]", ip6_sprintf(&desiredaddr), 3377 sppp_cp_type_name(type)); 3378 break; 3379 } 3380 /* Add the option to nak'ed list. */ 3381 bcopy (p, r, p[1]); 3382 r += p[1]; 3383 rlen += p[1]; 3384 } 3385 3386 if (rlen == 0 && type == CONF_ACK) { 3387 if (debug) 3388 addlog(" send %s\n", sppp_cp_type_name(type)); 3389 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, origlen, h + 1); 3390 } else { 3391 #ifdef notdef 3392 if (type == CONF_ACK) 3393 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3394 #endif 3395 3396 if (debug) { 3397 addlog(" send %s suggest %s\n", 3398 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); 3399 } 3400 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3401 } 3402 3403 end: 3404 free(buf, M_TEMP); 3405 return (rlen == 0); 3406 } 3407 3408 /* 3409 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3410 * negotiation. 3411 */ 3412 static void 3413 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3414 { 3415 u_char *buf, *p; 3416 struct ifnet *ifp = &sp->pp_if; 3417 int debug = ifp->if_flags & IFF_DEBUG; 3418 3419 len -= 4; 3420 buf = malloc (len, M_TEMP, M_NOWAIT); 3421 if (!buf) 3422 return; 3423 3424 if (debug) 3425 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:", 3426 SPP_ARGS(ifp)); 3427 3428 p = (void *)(h + 1); 3429 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3430 if (debug) 3431 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3432 switch (*p) { 3433 case IPV6CP_OPT_IFID: 3434 /* 3435 * Peer doesn't grok address option. This is 3436 * bad. XXX Should we better give up here? 3437 */ 3438 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3439 break; 3440 #ifdef notyet 3441 case IPV6CP_OPT_COMPRESS: 3442 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3443 break; 3444 #endif 3445 } 3446 } 3447 if (debug) 3448 addlog("\n"); 3449 free(buf, M_TEMP); 3450 return; 3451 } 3452 3453 /* 3454 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3455 * negotiation. 3456 */ 3457 static void 3458 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3459 { 3460 u_char *buf, *p; 3461 struct ifnet *ifp = &sp->pp_if; 3462 int debug = ifp->if_flags & IFF_DEBUG; 3463 struct in6_addr suggestaddr; 3464 3465 len -= 4; 3466 buf = malloc (len, M_TEMP, M_NOWAIT); 3467 if (!buf) 3468 return; 3469 3470 if (debug) 3471 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:", 3472 SPP_ARGS(ifp)); 3473 3474 p = (void *)(h + 1); 3475 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3476 if (debug) 3477 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3478 switch (*p) { 3479 case IPV6CP_OPT_IFID: 3480 /* 3481 * Peer doesn't like our local ifid. See 3482 * if we can do something for him. We'll drop 3483 * him our address then. 3484 */ 3485 if (len < 10 || p[1] != 10) 3486 break; 3487 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3488 suggestaddr.s6_addr16[0] = htons(0xfe80); 3489 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3490 bcopy(&p[2], &suggestaddr.s6_addr[8], 8); 3491 3492 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3493 if (debug) 3494 addlog(" [suggestaddr %s]", 3495 ip6_sprintf(&suggestaddr)); 3496 #ifdef IPV6CP_MYIFID_DYN 3497 /* 3498 * When doing dynamic address assignment, 3499 * we accept his offer. 3500 */ 3501 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3502 struct in6_addr lastsuggest; 3503 /* 3504 * If <suggested myaddr from peer> equals to 3505 * <hisaddr we have suggested last time>, 3506 * we have a collision. generate new random 3507 * ifid. 3508 */ 3509 sppp_suggest_ip6_addr(&lastsuggest); 3510 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3511 lastsuggest)) { 3512 if (debug) 3513 addlog(" [random]"); 3514 sppp_gen_ip6_addr(sp, &suggestaddr); 3515 } 3516 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3517 if (debug) 3518 addlog(" [agree]"); 3519 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3520 } 3521 #else 3522 /* 3523 * Since we do not do dynamic address assignment, 3524 * we ignore it and thus continue to negotiate 3525 * our already existing value. This can possibly 3526 * go into infinite request-reject loop. 3527 * 3528 * This is not likely because we normally use 3529 * ifid based on MAC-address. 3530 * If you have no ethernet card on the node, too bad. 3531 * XXX should we use fail_counter? 3532 */ 3533 #endif 3534 break; 3535 #ifdef notyet 3536 case IPV6CP_OPT_COMPRESS: 3537 /* 3538 * Peer wants different compression parameters. 3539 */ 3540 break; 3541 #endif 3542 } 3543 } 3544 if (debug) 3545 addlog("\n"); 3546 free(buf, M_TEMP); 3547 return; 3548 } 3549 3550 static void 3551 sppp_ipv6cp_tlu(struct sppp *sp) 3552 { 3553 /* we are up - notify isdn daemon */ 3554 if (sp->pp_con) 3555 sp->pp_con(sp); 3556 } 3557 3558 static void 3559 sppp_ipv6cp_tld(struct sppp *sp) 3560 { 3561 } 3562 3563 static void 3564 sppp_ipv6cp_tls(struct sppp *sp) 3565 { 3566 /* indicate to LCP that it must stay alive */ 3567 sp->lcp.protos |= (1 << IDX_IPV6CP); 3568 } 3569 3570 static void 3571 sppp_ipv6cp_tlf(struct sppp *sp) 3572 { 3573 /* we no longer need LCP */ 3574 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3575 } 3576 3577 static void 3578 sppp_ipv6cp_scr(struct sppp *sp) 3579 { 3580 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3581 struct in6_addr ouraddr; 3582 int i = 0; 3583 3584 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3585 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3586 opt[i++] = IPV6CP_OPT_IFID; 3587 opt[i++] = 10; 3588 bcopy(&ouraddr.s6_addr[8], &opt[i], 8); 3589 i += 8; 3590 } 3591 3592 #ifdef notyet 3593 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3594 opt[i++] = IPV6CP_OPT_COMPRESSION; 3595 opt[i++] = 4; 3596 opt[i++] = 0; /* TBD */ 3597 opt[i++] = 0; /* TBD */ 3598 /* variable length data may follow */ 3599 } 3600 #endif 3601 3602 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3603 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 3604 } 3605 #else /*INET6*/ 3606 static void sppp_ipv6cp_init(struct sppp *sp) 3607 { 3608 } 3609 3610 static void sppp_ipv6cp_up(struct sppp *sp) 3611 { 3612 } 3613 3614 static void sppp_ipv6cp_down(struct sppp *sp) 3615 { 3616 } 3617 3618 3619 static void sppp_ipv6cp_open(struct sppp *sp) 3620 { 3621 } 3622 3623 static void sppp_ipv6cp_close(struct sppp *sp) 3624 { 3625 } 3626 3627 static void sppp_ipv6cp_TO(void *sp) 3628 { 3629 } 3630 3631 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3632 { 3633 return 0; 3634 } 3635 3636 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3637 { 3638 } 3639 3640 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3641 { 3642 } 3643 3644 static void sppp_ipv6cp_tlu(struct sppp *sp) 3645 { 3646 } 3647 3648 static void sppp_ipv6cp_tld(struct sppp *sp) 3649 { 3650 } 3651 3652 static void sppp_ipv6cp_tls(struct sppp *sp) 3653 { 3654 } 3655 3656 static void sppp_ipv6cp_tlf(struct sppp *sp) 3657 { 3658 } 3659 3660 static void sppp_ipv6cp_scr(struct sppp *sp) 3661 { 3662 } 3663 #endif /*INET6*/ 3664 3665 3666 /* 3667 *--------------------------------------------------------------------------* 3668 * * 3669 * The CHAP implementation. * 3670 * * 3671 *--------------------------------------------------------------------------* 3672 */ 3673 3674 /* 3675 * The authentication protocols don't employ a full-fledged state machine as 3676 * the control protocols do, since they do have Open and Close events, but 3677 * not Up and Down, nor are they explicitly terminated. Also, use of the 3678 * authentication protocols may be different in both directions (this makes 3679 * sense, think of a machine that never accepts incoming calls but only 3680 * calls out, it doesn't require the called party to authenticate itself). 3681 * 3682 * Our state machine for the local authentication protocol (we are requesting 3683 * the peer to authenticate) looks like: 3684 * 3685 * RCA- 3686 * +--------------------------------------------+ 3687 * V scn,tld| 3688 * +--------+ Close +---------+ RCA+ 3689 * | |<----------------------------------| |------+ 3690 * +--->| Closed | TO* | Opened | sca | 3691 * | | |-----+ +-------| |<-----+ 3692 * | +--------+ irc | | +---------+ 3693 * | ^ | | ^ 3694 * | | | | | 3695 * | | | | | 3696 * | TO-| | | | 3697 * | |tld TO+ V | | 3698 * | | +------->+ | | 3699 * | | | | | | 3700 * | +--------+ V | | 3701 * | | |<----+<--------------------+ | 3702 * | | Req- | scr | 3703 * | | Sent | | 3704 * | | | | 3705 * | +--------+ | 3706 * | RCA- | | RCA+ | 3707 * +------+ +------------------------------------------+ 3708 * scn,tld sca,irc,ict,tlu 3709 * 3710 * 3711 * with: 3712 * 3713 * Open: LCP reached authentication phase 3714 * Close: LCP reached terminate phase 3715 * 3716 * RCA+: received reply (pap-req, chap-response), acceptable 3717 * RCN: received reply (pap-req, chap-response), not acceptable 3718 * TO+: timeout with restart counter >= 0 3719 * TO-: timeout with restart counter < 0 3720 * TO*: reschedule timeout for CHAP 3721 * 3722 * scr: send request packet (none for PAP, chap-challenge) 3723 * sca: send ack packet (pap-ack, chap-success) 3724 * scn: send nak packet (pap-nak, chap-failure) 3725 * ict: initialize re-challenge timer (CHAP only) 3726 * 3727 * tlu: this-layer-up, LCP reaches network phase 3728 * tld: this-layer-down, LCP enters terminate phase 3729 * 3730 * Note that in CHAP mode, after sending a new challenge, while the state 3731 * automaton falls back into Req-Sent state, it doesn't signal a tld 3732 * event to LCP, so LCP remains in network phase. Only after not getting 3733 * any response (or after getting an unacceptable response), CHAP closes, 3734 * causing LCP to enter terminate phase. 3735 * 3736 * With PAP, there is no initial request that can be sent. The peer is 3737 * expected to send one based on the successful negotiation of PAP as 3738 * the authentication protocol during the LCP option negotiation. 3739 * 3740 * Incoming authentication protocol requests (remote requests 3741 * authentication, we are peer) don't employ a state machine at all, 3742 * they are simply answered. Some peers [Ascend P50 firmware rev 3743 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 3744 * still in authentication phase (thereby violating the standard that 3745 * demands that these NCP packets are to be discarded), so we keep 3746 * track of the peer demanding us to authenticate, and only proceed to 3747 * phase network once we've seen a positive acknowledge for the 3748 * authentication. 3749 */ 3750 3751 /* 3752 * Handle incoming CHAP packets. 3753 */ 3754 void 3755 sppp_chap_input(struct sppp *sp, struct mbuf *m) 3756 { 3757 STDDCL; 3758 struct lcp_header *h; 3759 int len, x; 3760 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 3761 int value_len, name_len; 3762 MD5_CTX ctx; 3763 3764 len = m->m_pkthdr.len; 3765 if (len < 4) { 3766 if (debug) 3767 log(LOG_DEBUG, 3768 SPP_FMT "chap invalid packet length: %d bytes\n", 3769 SPP_ARGS(ifp), len); 3770 return; 3771 } 3772 h = mtod(m, struct lcp_header *); 3773 if (len > ntohs(h->len)) 3774 len = ntohs(h->len); 3775 3776 switch (h->type) { 3777 /* challenge, failure and success are his authproto */ 3778 case CHAP_CHALLENGE: 3779 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 3780 /* can't do anything usefull */ 3781 sp->pp_auth_failures++; 3782 printf(SPP_FMT "chap input without my name and my secret being set\n", 3783 SPP_ARGS(ifp)); 3784 break; 3785 } 3786 value = 1 + (u_char *)(h + 1); 3787 value_len = value[-1]; 3788 name = value + value_len; 3789 name_len = len - value_len - 5; 3790 if (name_len < 0) { 3791 if (debug) { 3792 log(LOG_DEBUG, 3793 SPP_FMT "chap corrupted challenge " 3794 "<%s id=0x%x len=%d", 3795 SPP_ARGS(ifp), 3796 sppp_auth_type_name(PPP_CHAP, h->type), 3797 h->ident, ntohs(h->len)); 3798 if (len > 4) 3799 sppp_print_bytes((u_char *)(h + 1), 3800 len - 4); 3801 addlog(">\n"); 3802 } 3803 break; 3804 } 3805 3806 if (debug) { 3807 log(LOG_DEBUG, 3808 SPP_FMT "chap input <%s id=0x%x len=%d name=", 3809 SPP_ARGS(ifp), 3810 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 3811 ntohs(h->len)); 3812 sppp_print_string((char *) name, name_len); 3813 addlog(" value-size=%d value=", value_len); 3814 sppp_print_bytes(value, value_len); 3815 addlog(">\n"); 3816 } 3817 3818 /* Compute reply value. */ 3819 MD5Init(&ctx); 3820 MD5Update(&ctx, &h->ident, 1); 3821 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 3822 MD5Update(&ctx, value, value_len); 3823 MD5Final(digest, &ctx); 3824 dsize = sizeof digest; 3825 3826 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 3827 sizeof dsize, (const char *)&dsize, 3828 sizeof digest, digest, 3829 sp->myauth.name_len, 3830 sp->myauth.name, 3831 0); 3832 break; 3833 3834 case CHAP_SUCCESS: 3835 if (debug) { 3836 log(LOG_DEBUG, SPP_FMT "chap success", 3837 SPP_ARGS(ifp)); 3838 if (len > 4) { 3839 addlog(": "); 3840 sppp_print_string((char *)(h + 1), len - 4); 3841 } 3842 addlog("\n"); 3843 } 3844 x = splnet(); 3845 sp->pp_auth_failures = 0; 3846 sp->pp_flags &= ~PP_NEEDAUTH; 3847 if (sp->myauth.proto == PPP_CHAP && 3848 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 3849 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 3850 /* 3851 * We are authenticator for CHAP but didn't 3852 * complete yet. Leave it to tlu to proceed 3853 * to network phase. 3854 */ 3855 splx(x); 3856 break; 3857 } 3858 splx(x); 3859 sppp_phase_network(sp); 3860 break; 3861 3862 case CHAP_FAILURE: 3863 x = splnet(); 3864 sp->pp_auth_failures++; 3865 splx(x); 3866 if (debug) { 3867 log(LOG_INFO, SPP_FMT "chap failure", 3868 SPP_ARGS(ifp)); 3869 if (len > 4) { 3870 addlog(": "); 3871 sppp_print_string((char *)(h + 1), len - 4); 3872 } 3873 addlog("\n"); 3874 } else 3875 log(LOG_INFO, SPP_FMT "chap failure\n", 3876 SPP_ARGS(ifp)); 3877 /* await LCP shutdown by authenticator */ 3878 break; 3879 3880 /* response is my authproto */ 3881 case CHAP_RESPONSE: 3882 if (sp->hisauth.secret == NULL) { 3883 /* can't do anything usefull */ 3884 printf(SPP_FMT "chap input without his secret being set\n", 3885 SPP_ARGS(ifp)); 3886 break; 3887 } 3888 value = 1 + (u_char *)(h + 1); 3889 value_len = value[-1]; 3890 name = value + value_len; 3891 name_len = len - value_len - 5; 3892 if (name_len < 0) { 3893 if (debug) { 3894 log(LOG_DEBUG, 3895 SPP_FMT "chap corrupted response " 3896 "<%s id=0x%x len=%d", 3897 SPP_ARGS(ifp), 3898 sppp_auth_type_name(PPP_CHAP, h->type), 3899 h->ident, ntohs(h->len)); 3900 if (len > 4) 3901 sppp_print_bytes((u_char *)(h + 1), 3902 len - 4); 3903 addlog(">\n"); 3904 } 3905 break; 3906 } 3907 if (h->ident != sp->confid[IDX_CHAP]) { 3908 if (debug) 3909 log(LOG_DEBUG, 3910 SPP_FMT "chap dropping response for old ID " 3911 "(got %d, expected %d)\n", 3912 SPP_ARGS(ifp), 3913 h->ident, sp->confid[IDX_CHAP]); 3914 break; 3915 } 3916 if (sp->hisauth.name != NULL && 3917 (name_len != sp->hisauth.name_len 3918 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 3919 log(LOG_INFO, SPP_FMT "chap response, his name ", 3920 SPP_ARGS(ifp)); 3921 sppp_print_string(name, name_len); 3922 addlog(" != expected "); 3923 sppp_print_string(sp->hisauth.name, 3924 sp->hisauth.name_len); 3925 addlog("\n"); 3926 goto chap_failure; 3927 } 3928 if (debug) { 3929 log(LOG_DEBUG, SPP_FMT "chap input(%s) " 3930 "<%s id=0x%x len=%d name=", 3931 SPP_ARGS(ifp), 3932 sppp_state_name(sp->state[IDX_CHAP]), 3933 sppp_auth_type_name(PPP_CHAP, h->type), 3934 h->ident, ntohs(h->len)); 3935 sppp_print_string((char *)name, name_len); 3936 addlog(" value-size=%d value=", value_len); 3937 sppp_print_bytes(value, value_len); 3938 addlog(">\n"); 3939 } 3940 if (value_len != sizeof(sp->myauth.challenge)) { 3941 if (debug) 3942 log(LOG_DEBUG, 3943 SPP_FMT "chap bad hash value length: " 3944 "%d bytes, should be %ld\n", 3945 SPP_ARGS(ifp), value_len, 3946 (long) sizeof(sp->myauth.challenge)); 3947 goto chap_failure; 3948 } 3949 3950 MD5Init(&ctx); 3951 MD5Update(&ctx, &h->ident, 1); 3952 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 3953 MD5Update(&ctx, sp->myauth.challenge, sizeof(sp->myauth.challenge)); 3954 MD5Final(digest, &ctx); 3955 3956 #define FAILMSG "Failed..." 3957 #define SUCCMSG "Welcome!" 3958 3959 if (value_len != sizeof digest || 3960 memcmp(digest, value, value_len) != 0) { 3961 chap_failure: 3962 /* action scn, tld */ 3963 x = splnet(); 3964 sp->pp_auth_failures++; 3965 splx(x); 3966 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 3967 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 3968 0); 3969 chap.tld(sp); 3970 break; 3971 } 3972 sp->pp_auth_failures = 0; 3973 /* action sca, perhaps tlu */ 3974 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 3975 sp->state[IDX_CHAP] == STATE_OPENED) 3976 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 3977 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 3978 0); 3979 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 3980 sppp_cp_change_state(&chap, sp, STATE_OPENED); 3981 chap.tlu(sp); 3982 } 3983 break; 3984 3985 default: 3986 /* Unknown CHAP packet type -- ignore. */ 3987 if (debug) { 3988 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) " 3989 "<0x%x id=0x%xh len=%d", 3990 SPP_ARGS(ifp), 3991 sppp_state_name(sp->state[IDX_CHAP]), 3992 h->type, h->ident, ntohs(h->len)); 3993 if (len > 4) 3994 sppp_print_bytes((u_char *)(h + 1), len - 4); 3995 addlog(">\n"); 3996 } 3997 break; 3998 3999 } 4000 } 4001 4002 static void 4003 sppp_chap_init(struct sppp *sp) 4004 { 4005 /* Chap doesn't have STATE_INITIAL at all. */ 4006 sp->state[IDX_CHAP] = STATE_CLOSED; 4007 sp->fail_counter[IDX_CHAP] = 0; 4008 sp->pp_seq[IDX_CHAP] = 0; 4009 sp->pp_rseq[IDX_CHAP] = 0; 4010 callout_init(&sp->ch[IDX_CHAP]); 4011 } 4012 4013 static void 4014 sppp_chap_open(struct sppp *sp) 4015 { 4016 if (sp->myauth.proto == PPP_CHAP && 4017 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4018 /* we are authenticator for CHAP, start it */ 4019 chap.scr(sp); 4020 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4021 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4022 } 4023 /* nothing to be done if we are peer, await a challenge */ 4024 } 4025 4026 static void 4027 sppp_chap_close(struct sppp *sp) 4028 { 4029 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4030 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4031 } 4032 4033 static void 4034 sppp_chap_TO(void *cookie) 4035 { 4036 struct sppp *sp = (struct sppp *)cookie; 4037 STDDCL; 4038 int s; 4039 4040 s = splnet(); 4041 if (debug) 4042 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n", 4043 SPP_ARGS(ifp), 4044 sppp_state_name(sp->state[IDX_CHAP]), 4045 sp->rst_counter[IDX_CHAP]); 4046 4047 if (--sp->rst_counter[IDX_CHAP] < 0) 4048 /* TO- event */ 4049 switch (sp->state[IDX_CHAP]) { 4050 case STATE_REQ_SENT: 4051 chap.tld(sp); 4052 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4053 break; 4054 } 4055 else 4056 /* TO+ (or TO*) event */ 4057 switch (sp->state[IDX_CHAP]) { 4058 case STATE_OPENED: 4059 /* TO* event */ 4060 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4061 /* fall through */ 4062 case STATE_REQ_SENT: 4063 chap.scr(sp); 4064 /* sppp_cp_change_state() will restart the timer */ 4065 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4066 break; 4067 } 4068 4069 splx(s); 4070 } 4071 4072 static void 4073 sppp_chap_tlu(struct sppp *sp) 4074 { 4075 STDDCL; 4076 int i, x; 4077 4078 i = 0; 4079 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4080 4081 /* 4082 * Some broken CHAP implementations (Conware CoNet, firmware 4083 * 4.0.?) don't want to re-authenticate their CHAP once the 4084 * initial challenge-response exchange has taken place. 4085 * Provide for an option to avoid rechallenges. 4086 */ 4087 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4088 /* 4089 * Compute the re-challenge timeout. This will yield 4090 * a number between 300 and 810 seconds. 4091 */ 4092 i = 300 + ((unsigned)(random() & 0xff00) >> 7); 4093 4094 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4095 } 4096 4097 if (debug) { 4098 log(LOG_DEBUG, 4099 SPP_FMT "chap %s, ", 4100 SPP_ARGS(ifp), 4101 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4102 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4103 addlog("next re-challenge in %d seconds\n", i); 4104 else 4105 addlog("re-challenging supressed\n"); 4106 } 4107 4108 x = splnet(); 4109 sp->pp_auth_failures = 0; 4110 /* indicate to LCP that we need to be closed down */ 4111 sp->lcp.protos |= (1 << IDX_CHAP); 4112 4113 if (sp->pp_flags & PP_NEEDAUTH) { 4114 /* 4115 * Remote is authenticator, but his auth proto didn't 4116 * complete yet. Defer the transition to network 4117 * phase. 4118 */ 4119 splx(x); 4120 return; 4121 } 4122 splx(x); 4123 4124 /* 4125 * If we are already in phase network, we are done here. This 4126 * is the case if this is a dummy tlu event after a re-challenge. 4127 */ 4128 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4129 sppp_phase_network(sp); 4130 } 4131 4132 static void 4133 sppp_chap_tld(struct sppp *sp) 4134 { 4135 STDDCL; 4136 4137 if (debug) 4138 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp)); 4139 callout_stop(&sp->ch[IDX_CHAP]); 4140 sp->lcp.protos &= ~(1 << IDX_CHAP); 4141 4142 lcp.Close(sp); 4143 } 4144 4145 static void 4146 sppp_chap_scr(struct sppp *sp) 4147 { 4148 struct timeval tv; 4149 u_int32_t *ch, seed; 4150 u_char clen; 4151 4152 if (sp->myauth.name == NULL) { 4153 /* can't do anything usefull */ 4154 printf(SPP_FMT "chap starting without my name being set\n", 4155 SPP_ARGS(&sp->pp_if)); 4156 return; 4157 } 4158 4159 /* Compute random challenge. */ 4160 ch = (u_int32_t *)sp->myauth.challenge; 4161 microtime(&tv); 4162 seed = tv.tv_sec ^ tv.tv_usec; 4163 ch[0] = seed ^ random(); 4164 ch[1] = seed ^ random(); 4165 ch[2] = seed ^ random(); 4166 ch[3] = seed ^ random(); 4167 clen = 16; /* 4 * sizeof(u_int32_t) */ 4168 4169 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4170 4171 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4172 sizeof clen, (const char *)&clen, 4173 sizeof(sp->myauth.challenge), sp->myauth.challenge, 4174 sp->myauth.name_len, 4175 sp->myauth.name, 4176 0); 4177 } 4178 4179 /* 4180 *--------------------------------------------------------------------------* 4181 * * 4182 * The PAP implementation. * 4183 * * 4184 *--------------------------------------------------------------------------* 4185 */ 4186 /* 4187 * For PAP, we need to keep a little state also if we are the peer, not the 4188 * authenticator. This is since we don't get a request to authenticate, but 4189 * have to repeatedly authenticate ourself until we got a response (or the 4190 * retry counter is expired). 4191 */ 4192 4193 /* 4194 * Handle incoming PAP packets. */ 4195 static void 4196 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4197 { 4198 STDDCL; 4199 struct lcp_header *h; 4200 int len, x; 4201 u_char mlen; 4202 char *name, *secret; 4203 int name_len, secret_len; 4204 4205 len = m->m_pkthdr.len; 4206 if (len < 5) { 4207 if (debug) 4208 log(LOG_DEBUG, 4209 SPP_FMT "pap invalid packet length: %d bytes\n", 4210 SPP_ARGS(ifp), len); 4211 return; 4212 } 4213 h = mtod(m, struct lcp_header *); 4214 if (len > ntohs(h->len)) 4215 len = ntohs(h->len); 4216 switch (h->type) { 4217 /* PAP request is my authproto */ 4218 case PAP_REQ: 4219 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4220 /* can't do anything usefull */ 4221 printf(SPP_FMT "pap request without his name and his secret being set\n", 4222 SPP_ARGS(ifp)); 4223 break; 4224 } 4225 name = 1 + (u_char *)(h + 1); 4226 name_len = name[-1]; 4227 secret = name + name_len + 1; 4228 if (name_len > len - 6 || 4229 (secret_len = secret[-1]) > len - 6 - name_len) { 4230 if (debug) { 4231 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4232 "<%s id=0x%x len=%d", 4233 SPP_ARGS(ifp), 4234 sppp_auth_type_name(PPP_PAP, h->type), 4235 h->ident, ntohs(h->len)); 4236 if (len > 4) 4237 sppp_print_bytes((u_char *)(h + 1), 4238 len - 4); 4239 addlog(">\n"); 4240 } 4241 break; 4242 } 4243 if (debug) { 4244 log(LOG_DEBUG, SPP_FMT "pap input(%s) " 4245 "<%s id=0x%x len=%d name=", 4246 SPP_ARGS(ifp), 4247 sppp_state_name(sp->state[IDX_PAP]), 4248 sppp_auth_type_name(PPP_PAP, h->type), 4249 h->ident, ntohs(h->len)); 4250 sppp_print_string((char *)name, name_len); 4251 addlog(" secret="); 4252 sppp_print_string((char *)secret, secret_len); 4253 addlog(">\n"); 4254 } 4255 if (name_len != sp->hisauth.name_len || 4256 secret_len != sp->hisauth.secret_len || 4257 memcmp(name, sp->hisauth.name, name_len) != 0 || 4258 memcmp(secret, sp->hisauth.secret, secret_len) != 0) { 4259 /* action scn, tld */ 4260 sp->pp_auth_failures++; 4261 mlen = sizeof(FAILMSG) - 1; 4262 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4263 sizeof mlen, (const char *)&mlen, 4264 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 4265 0); 4266 pap.tld(sp); 4267 break; 4268 } 4269 /* action sca, perhaps tlu */ 4270 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4271 sp->state[IDX_PAP] == STATE_OPENED) { 4272 mlen = sizeof(SUCCMSG) - 1; 4273 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4274 sizeof mlen, (const char *)&mlen, 4275 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 4276 0); 4277 } 4278 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4279 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4280 pap.tlu(sp); 4281 } 4282 break; 4283 4284 /* ack and nak are his authproto */ 4285 case PAP_ACK: 4286 callout_stop(&sp->pap_my_to_ch); 4287 if (debug) { 4288 log(LOG_DEBUG, SPP_FMT "pap success", 4289 SPP_ARGS(ifp)); 4290 name_len = *(char *)h; 4291 if (len > 5 && name_len) { 4292 addlog(": "); 4293 sppp_print_string((char *)(h + 1), name_len); 4294 } 4295 addlog("\n"); 4296 } 4297 x = splnet(); 4298 sp->pp_auth_failures = 0; 4299 sp->pp_flags &= ~PP_NEEDAUTH; 4300 if (sp->myauth.proto == PPP_PAP && 4301 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4302 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4303 /* 4304 * We are authenticator for PAP but didn't 4305 * complete yet. Leave it to tlu to proceed 4306 * to network phase. 4307 */ 4308 splx(x); 4309 break; 4310 } 4311 splx(x); 4312 sppp_phase_network(sp); 4313 break; 4314 4315 case PAP_NAK: 4316 callout_stop(&sp->pap_my_to_ch); 4317 sp->pp_auth_failures++; 4318 if (debug) { 4319 log(LOG_INFO, SPP_FMT "pap failure", 4320 SPP_ARGS(ifp)); 4321 name_len = *(char *)h; 4322 if (len > 5 && name_len) { 4323 addlog(": "); 4324 sppp_print_string((char *)(h + 1), name_len); 4325 } 4326 addlog("\n"); 4327 } else 4328 log(LOG_INFO, SPP_FMT "pap failure\n", 4329 SPP_ARGS(ifp)); 4330 /* await LCP shutdown by authenticator */ 4331 break; 4332 4333 default: 4334 /* Unknown PAP packet type -- ignore. */ 4335 if (debug) { 4336 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4337 "<0x%x id=0x%x len=%d", 4338 SPP_ARGS(ifp), 4339 h->type, h->ident, ntohs(h->len)); 4340 if (len > 4) 4341 sppp_print_bytes((u_char *)(h + 1), len - 4); 4342 addlog(">\n"); 4343 } 4344 break; 4345 4346 } 4347 } 4348 4349 static void 4350 sppp_pap_init(struct sppp *sp) 4351 { 4352 /* PAP doesn't have STATE_INITIAL at all. */ 4353 sp->state[IDX_PAP] = STATE_CLOSED; 4354 sp->fail_counter[IDX_PAP] = 0; 4355 sp->pp_seq[IDX_PAP] = 0; 4356 sp->pp_rseq[IDX_PAP] = 0; 4357 callout_init(&sp->ch[IDX_PAP]); 4358 callout_init(&sp->pap_my_to_ch); 4359 } 4360 4361 static void 4362 sppp_pap_open(struct sppp *sp) 4363 { 4364 if (sp->hisauth.proto == PPP_PAP && 4365 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4366 /* we are authenticator for PAP, start our timer */ 4367 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4368 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4369 } 4370 if (sp->myauth.proto == PPP_PAP) { 4371 /* we are peer, send a request, and start a timer */ 4372 pap.scr(sp); 4373 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4374 sppp_pap_my_TO, sp); 4375 } 4376 } 4377 4378 static void 4379 sppp_pap_close(struct sppp *sp) 4380 { 4381 if (sp->state[IDX_PAP] != STATE_CLOSED) 4382 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4383 } 4384 4385 /* 4386 * That's the timeout routine if we are authenticator. Since the 4387 * authenticator is basically passive in PAP, we can't do much here. 4388 */ 4389 static void 4390 sppp_pap_TO(void *cookie) 4391 { 4392 struct sppp *sp = (struct sppp *)cookie; 4393 STDDCL; 4394 int s; 4395 4396 s = splnet(); 4397 if (debug) 4398 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n", 4399 SPP_ARGS(ifp), 4400 sppp_state_name(sp->state[IDX_PAP]), 4401 sp->rst_counter[IDX_PAP]); 4402 4403 if (--sp->rst_counter[IDX_PAP] < 0) 4404 /* TO- event */ 4405 switch (sp->state[IDX_PAP]) { 4406 case STATE_REQ_SENT: 4407 pap.tld(sp); 4408 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4409 break; 4410 } 4411 else 4412 /* TO+ event, not very much we could do */ 4413 switch (sp->state[IDX_PAP]) { 4414 case STATE_REQ_SENT: 4415 /* sppp_cp_change_state() will restart the timer */ 4416 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4417 break; 4418 } 4419 4420 splx(s); 4421 } 4422 4423 /* 4424 * That's the timeout handler if we are peer. Since the peer is active, 4425 * we need to retransmit our PAP request since it is apparently lost. 4426 * XXX We should impose a max counter. 4427 */ 4428 static void 4429 sppp_pap_my_TO(void *cookie) 4430 { 4431 struct sppp *sp = (struct sppp *)cookie; 4432 STDDCL; 4433 4434 if (debug) 4435 log(LOG_DEBUG, SPP_FMT "pap peer TO\n", 4436 SPP_ARGS(ifp)); 4437 4438 pap.scr(sp); 4439 } 4440 4441 static void 4442 sppp_pap_tlu(struct sppp *sp) 4443 { 4444 STDDCL; 4445 int x; 4446 4447 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4448 4449 if (debug) 4450 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 4451 SPP_ARGS(ifp), pap.name); 4452 4453 x = splnet(); 4454 sp->pp_auth_failures = 0; 4455 /* indicate to LCP that we need to be closed down */ 4456 sp->lcp.protos |= (1 << IDX_PAP); 4457 4458 if (sp->pp_flags & PP_NEEDAUTH) { 4459 /* 4460 * Remote is authenticator, but his auth proto didn't 4461 * complete yet. Defer the transition to network 4462 * phase. 4463 */ 4464 splx(x); 4465 return; 4466 } 4467 splx(x); 4468 sppp_phase_network(sp); 4469 } 4470 4471 static void 4472 sppp_pap_tld(struct sppp *sp) 4473 { 4474 STDDCL; 4475 4476 if (debug) 4477 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp)); 4478 callout_stop(&sp->ch[IDX_PAP]); 4479 callout_stop(&sp->pap_my_to_ch); 4480 sp->lcp.protos &= ~(1 << IDX_PAP); 4481 4482 lcp.Close(sp); 4483 } 4484 4485 static void 4486 sppp_pap_scr(struct sppp *sp) 4487 { 4488 u_char idlen, pwdlen; 4489 4490 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4491 /* can't do anything usefull */ 4492 printf(SPP_FMT "pap starting without my name and secret being set\n", 4493 SPP_ARGS(&sp->pp_if)); 4494 return; 4495 } 4496 4497 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4498 pwdlen = sp->myauth.secret_len; 4499 idlen = sp->myauth.name_len; 4500 4501 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4502 sizeof idlen, (const char *)&idlen, 4503 idlen, sp->myauth.name, 4504 sizeof pwdlen, (const char *)&pwdlen, 4505 pwdlen, sp->myauth.secret, 4506 0); 4507 } 4508 4509 /* 4510 * Random miscellaneous functions. 4511 */ 4512 4513 /* 4514 * Send a PAP or CHAP proto packet. 4515 * 4516 * Varadic function, each of the elements for the ellipsis is of type 4517 * ``size_t mlen, const u_char *msg''. Processing will stop iff 4518 * mlen == 0. 4519 * NOTE: never declare variadic functions with types subject to type 4520 * promotion (i.e. u_char). This is asking for big trouble depending 4521 * on the architecture you are on... 4522 */ 4523 4524 static void 4525 sppp_auth_send(const struct cp *cp, struct sppp *sp, 4526 unsigned int type, unsigned int id, 4527 ...) 4528 { 4529 STDDCL; 4530 struct lcp_header *lh; 4531 struct mbuf *m; 4532 u_char *p; 4533 int len; 4534 size_t pkthdrlen; 4535 unsigned int mlen; 4536 const char *msg; 4537 va_list ap; 4538 4539 MGETHDR(m, M_DONTWAIT, MT_DATA); 4540 if (! m) 4541 return; 4542 m->m_pkthdr.rcvif = 0; 4543 4544 if (sp->pp_flags & PP_NOFRAMING) { 4545 *mtod(m, u_int16_t *) = htons(cp->proto); 4546 pkthdrlen = 2; 4547 lh = (struct lcp_header *)(mtod(m, u_int8_t *)+2); 4548 } else { 4549 struct ppp_header *h; 4550 h = mtod(m, struct ppp_header *); 4551 h->address = PPP_ALLSTATIONS; /* broadcast address */ 4552 h->control = PPP_UI; /* Unnumbered Info */ 4553 h->protocol = htons(cp->proto); 4554 pkthdrlen = PPP_HEADER_LEN; 4555 4556 lh = (struct lcp_header *)(h + 1); 4557 } 4558 4559 lh->type = type; 4560 lh->ident = id; 4561 p = (u_char *)(lh + 1); 4562 4563 va_start(ap, id); 4564 len = 0; 4565 4566 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 4567 msg = va_arg(ap, const char *); 4568 len += mlen; 4569 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 4570 va_end(ap); 4571 m_freem(m); 4572 return; 4573 } 4574 4575 bcopy(msg, p, mlen); 4576 p += mlen; 4577 } 4578 va_end(ap); 4579 4580 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 4581 lh->len = htons(LCP_HEADER_LEN + len); 4582 4583 if (debug) { 4584 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 4585 SPP_ARGS(ifp), cp->name, 4586 sppp_auth_type_name(cp->proto, lh->type), 4587 lh->ident, ntohs(lh->len)); 4588 if (len) 4589 sppp_print_bytes((u_char *)(lh + 1), len); 4590 addlog(">\n"); 4591 } 4592 if (IF_QFULL(&sp->pp_cpq)) { 4593 IF_DROP(&sp->pp_fastq); 4594 IF_DROP(&ifp->if_snd); 4595 m_freem(m); 4596 ++ifp->if_oerrors; 4597 return; 4598 } else 4599 IF_ENQUEUE(&sp->pp_cpq, m); 4600 if (! (ifp->if_flags & IFF_OACTIVE)) 4601 (*ifp->if_start)(ifp); 4602 ifp->if_obytes += m->m_pkthdr.len + 3; 4603 } 4604 4605 /* 4606 * Send keepalive packets, every 10 seconds. 4607 */ 4608 static void 4609 sppp_keepalive(void *dummy) 4610 { 4611 struct sppp *sp; 4612 int s; 4613 time_t now; 4614 4615 s = splnet(); 4616 now = mono_time.tv_sec; 4617 for (sp=spppq; sp; sp=sp->pp_next) { 4618 struct ifnet *ifp = &sp->pp_if; 4619 4620 /* check idle timeout */ 4621 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 4622 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 4623 /* idle timeout is enabled for this interface */ 4624 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 4625 if (ifp->if_flags & IFF_DEBUG) 4626 printf("%s: no activitiy for %lu seconds\n", 4627 sp->pp_if.if_xname, 4628 (unsigned long)(now-sp->pp_last_activity)); 4629 lcp.Close(sp); 4630 continue; 4631 } 4632 } 4633 4634 /* Keepalive mode disabled or channel down? */ 4635 if (! (sp->pp_flags & PP_KEEPALIVE) || 4636 ! (ifp->if_flags & IFF_RUNNING)) 4637 continue; 4638 4639 /* No keepalive in PPP mode if LCP not opened yet. */ 4640 if (! (sp->pp_flags & PP_CISCO) && 4641 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) 4642 continue; 4643 4644 /* No echo reply, but maybe user data passed through? */ 4645 if ((now - sp->pp_last_activity) < LCP_KEEPALIVE_INTERVAL) { 4646 sp->pp_alivecnt = 0; 4647 continue; 4648 } 4649 4650 if (sp->pp_alivecnt == MAXALIVECNT) { 4651 /* No keepalive packets got. Stop the interface. */ 4652 if_down (ifp); 4653 IF_PURGE(&sp->pp_cpq); 4654 if (! (sp->pp_flags & PP_CISCO)) { 4655 printf("%s: LCP keepalive timed out, going to restart the connection\n", 4656 ifp->if_xname); 4657 sp->pp_alivecnt = 0; 4658 4659 /* we are down, close all open protocols */ 4660 lcp.Close(sp); 4661 4662 /* And now prepare LCP to reestablish the link, if configured to do so. */ 4663 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 4664 4665 /* Close connection imediatly, completition of this 4666 * will summon the magic needed to reestablish it. */ 4667 sp->pp_tlf(sp); 4668 continue; 4669 } 4670 } 4671 if (sp->pp_alivecnt <= MAXALIVECNT) 4672 ++sp->pp_alivecnt; 4673 if (sp->pp_flags & PP_CISCO) 4674 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, 4675 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 4676 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 4677 int32_t nmagic = htonl(sp->lcp.magic); 4678 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 4679 sppp_cp_send(sp, PPP_LCP, ECHO_REQ, 4680 sp->lcp.echoid, 4, &nmagic); 4681 } 4682 } 4683 splx(s); 4684 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 4685 } 4686 4687 /* 4688 * Get both IP addresses. 4689 */ 4690 static void 4691 sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, u_int32_t *srcmask) 4692 { 4693 struct ifnet *ifp = &sp->pp_if; 4694 struct ifaddr *ifa; 4695 struct sockaddr_in *si, *sm; 4696 u_int32_t ssrc, ddst; 4697 4698 sm = NULL; 4699 ssrc = ddst = 0; 4700 /* 4701 * Pick the first AF_INET address from the list, 4702 * aliases don't make any sense on a p2p link anyway. 4703 */ 4704 si = 0; 4705 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 4706 if (ifa->ifa_addr->sa_family == AF_INET) { 4707 si = (struct sockaddr_in *)ifa->ifa_addr; 4708 sm = (struct sockaddr_in *)ifa->ifa_netmask; 4709 if (si) 4710 break; 4711 } 4712 } 4713 if (ifa) { 4714 if (si && si->sin_addr.s_addr) { 4715 ssrc = si->sin_addr.s_addr; 4716 if (srcmask) 4717 *srcmask = ntohl(sm->sin_addr.s_addr); 4718 } 4719 4720 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 4721 if (si && si->sin_addr.s_addr) 4722 ddst = si->sin_addr.s_addr; 4723 } 4724 4725 if (dst) *dst = ntohl(ddst); 4726 if (src) *src = ntohl(ssrc); 4727 } 4728 4729 /* 4730 * Set IP addresses. Must be called at splnet. 4731 * If an address is 0, leave it the way it is. 4732 */ 4733 static void 4734 sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr) 4735 { 4736 STDDCL; 4737 struct ifaddr *ifa; 4738 struct sockaddr_in *si; 4739 struct sockaddr_in *dest; 4740 4741 /* 4742 * Pick the first AF_INET address from the list, 4743 * aliases don't make any sense on a p2p link anyway. 4744 */ 4745 4746 si = 0; 4747 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4748 { 4749 if (ifa->ifa_addr->sa_family == AF_INET) 4750 { 4751 si = (struct sockaddr_in *)ifa->ifa_addr; 4752 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4753 if (si) 4754 break; 4755 } 4756 } 4757 4758 if (ifa && si) 4759 { 4760 int error; 4761 struct sockaddr_in new_sin = *si; 4762 struct sockaddr_in new_dst = *dest; 4763 4764 /* 4765 * Scrub old routes now instead of calling in_ifinit with 4766 * scrub=1, because we may change the dstaddr 4767 * before the call to in_ifinit. 4768 */ 4769 in_ifscrub(ifp, ifatoia(ifa)); 4770 4771 if (myaddr != 0) 4772 new_sin.sin_addr.s_addr = htonl(myaddr); 4773 if (hisaddr != 0) { 4774 new_dst.sin_addr.s_addr = htonl(hisaddr); 4775 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) { 4776 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 4777 *dest = new_dst; /* fix dstaddr in place */ 4778 } 4779 } 4780 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4781 if(debug && error) 4782 { 4783 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addrs: in_ifinit " 4784 " failed, error=%d\n", SPP_ARGS(ifp), error); 4785 } 4786 } 4787 } 4788 4789 /* 4790 * Clear IP addresses. Must be called at splnet. 4791 */ 4792 static void 4793 sppp_clear_ip_addrs(struct sppp *sp) 4794 { 4795 struct ifnet *ifp = &sp->pp_if; 4796 struct ifaddr *ifa; 4797 struct sockaddr_in *si; 4798 struct sockaddr_in *dest; 4799 4800 u_int32_t remote; 4801 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4802 remote = sp->ipcp.saved_hisaddr; 4803 else 4804 sppp_get_ip_addrs(sp, 0, &remote, 0); 4805 4806 /* 4807 * Pick the first AF_INET address from the list, 4808 * aliases don't make any sense on a p2p link anyway. 4809 */ 4810 4811 si = 0; 4812 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4813 { 4814 if (ifa->ifa_addr->sa_family == AF_INET) 4815 { 4816 si = (struct sockaddr_in *)ifa->ifa_addr; 4817 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4818 if (si) 4819 break; 4820 } 4821 } 4822 4823 if (ifa && si) 4824 { 4825 struct sockaddr_in new_sin = *si; 4826 4827 in_ifscrub(ifp, ifatoia(ifa)); 4828 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 4829 new_sin.sin_addr.s_addr = 0; 4830 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4831 /* replace peer addr in place */ 4832 dest->sin_addr.s_addr = sp->ipcp.saved_hisaddr; 4833 in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4834 } 4835 } 4836 4837 #ifdef INET6 4838 /* 4839 * Get both IPv6 addresses. 4840 */ 4841 static void 4842 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 4843 struct in6_addr *srcmask) 4844 { 4845 struct ifnet *ifp = &sp->pp_if; 4846 struct ifaddr *ifa; 4847 struct sockaddr_in6 *si, *sm; 4848 struct in6_addr ssrc, ddst; 4849 4850 sm = NULL; 4851 memset(&ssrc, 0, sizeof(ssrc)); 4852 memset(&ddst, 0, sizeof(ddst)); 4853 /* 4854 * Pick the first link-local AF_INET6 address from the list, 4855 * aliases don't make any sense on a p2p link anyway. 4856 */ 4857 si = 0; 4858 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4859 if (ifa->ifa_addr->sa_family == AF_INET6) { 4860 si = (struct sockaddr_in6 *)ifa->ifa_addr; 4861 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 4862 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 4863 break; 4864 } 4865 if (ifa) { 4866 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 4867 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc)); 4868 if (srcmask) { 4869 bcopy(&sm->sin6_addr, srcmask, 4870 sizeof(*srcmask)); 4871 } 4872 } 4873 4874 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 4875 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 4876 bcopy(&si->sin6_addr, &ddst, sizeof(ddst)); 4877 } 4878 4879 if (dst) 4880 bcopy(&ddst, dst, sizeof(*dst)); 4881 if (src) 4882 bcopy(&ssrc, src, sizeof(*src)); 4883 } 4884 4885 #ifdef IPV6CP_MYIFID_DYN 4886 /* 4887 * Generate random ifid. 4888 */ 4889 static void 4890 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 4891 { 4892 /* TBD */ 4893 } 4894 4895 /* 4896 * Set my IPv6 address. Must be called at splnet. 4897 */ 4898 static void 4899 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 4900 { 4901 STDDCL; 4902 struct ifaddr *ifa; 4903 struct sockaddr_in6 *sin6; 4904 4905 /* 4906 * Pick the first link-local AF_INET6 address from the list, 4907 * aliases don't make any sense on a p2p link anyway. 4908 */ 4909 4910 sin6 = NULL; 4911 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4912 { 4913 if (ifa->ifa_addr->sa_family == AF_INET6) 4914 { 4915 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 4916 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 4917 break; 4918 } 4919 } 4920 4921 if (ifa && sin6) 4922 { 4923 int error; 4924 struct sockaddr_in6 new_sin6 = *sin6; 4925 4926 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr)); 4927 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 4928 if (debug && error) 4929 { 4930 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit " 4931 " failed, error=%d\n", SPP_ARGS(ifp), error); 4932 } 4933 } 4934 } 4935 #endif 4936 4937 /* 4938 * Suggest a candidate address to be used by peer. 4939 */ 4940 static void 4941 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 4942 { 4943 struct in6_addr myaddr; 4944 struct timeval tv; 4945 4946 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4947 4948 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 4949 microtime(&tv); 4950 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 4951 myaddr.s6_addr[14] ^= 0xff; 4952 myaddr.s6_addr[15] ^= 0xff; 4953 } else { 4954 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 4955 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 4956 } 4957 if (suggest) 4958 bcopy(&myaddr, suggest, sizeof(myaddr)); 4959 } 4960 #endif /*INET6*/ 4961 4962 /* 4963 * Process ioctl requests specific to the PPP interface. 4964 * Permissions have already been checked. 4965 */ 4966 static int 4967 sppp_params(struct sppp *sp, int cmd, void *data) 4968 { 4969 switch (cmd) { 4970 case SPPPGETAUTHCFG: 4971 { 4972 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 4973 int error; 4974 size_t len; 4975 4976 cfg->myauthflags = sp->myauth.flags; 4977 cfg->hisauthflags = sp->hisauth.flags; 4978 strncpy(cfg->ifname, sp->pp_if.if_xname, IFNAMSIZ); 4979 cfg->hisauth = 0; 4980 if (sp->hisauth.proto) 4981 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4982 cfg->myauth = 0; 4983 if (sp->myauth.proto) 4984 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4985 if (cfg->myname_length == 0) { 4986 if (sp->myauth.name != NULL) 4987 cfg->myname_length = sp->myauth.name_len + 1; 4988 } else { 4989 if (sp->myauth.name == NULL) { 4990 cfg->myname_length = 0; 4991 } else { 4992 len = sp->myauth.name_len + 1; 4993 if (cfg->myname_length < len) 4994 return (ENAMETOOLONG); 4995 error = copyout(sp->myauth.name, cfg->myname, len); 4996 if (error) return error; 4997 } 4998 } 4999 if (cfg->hisname_length == 0) { 5000 if(sp->hisauth.name != NULL) 5001 cfg->hisname_length = sp->hisauth.name_len + 1; 5002 } else { 5003 if (sp->hisauth.name == NULL) { 5004 cfg->hisname_length = 0; 5005 } else { 5006 len = sp->hisauth.name_len + 1; 5007 if (cfg->hisname_length < len) 5008 return (ENAMETOOLONG); 5009 error = copyout(sp->hisauth.name, cfg->hisname, len); 5010 if (error) return error; 5011 } 5012 } 5013 } 5014 break; 5015 case SPPPSETAUTHCFG: 5016 { 5017 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5018 int error; 5019 5020 if (sp->myauth.name) { 5021 free(sp->myauth.name, M_DEVBUF); 5022 sp->myauth.name = NULL; 5023 } 5024 if (sp->myauth.secret) { 5025 free(sp->myauth.secret, M_DEVBUF); 5026 sp->myauth.secret = NULL; 5027 } 5028 if (sp->hisauth.name) { 5029 free(sp->hisauth.name, M_DEVBUF); 5030 sp->hisauth.name = NULL; 5031 } 5032 if (sp->hisauth.secret) { 5033 free(sp->hisauth.secret, M_DEVBUF); 5034 sp->hisauth.secret = NULL; 5035 } 5036 5037 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5038 if (cfg->hisname_length >= MCLBYTES) 5039 return (ENAMETOOLONG); 5040 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5041 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5042 if (error) { 5043 free(sp->hisauth.name, M_DEVBUF); 5044 sp->hisauth.name = NULL; 5045 return error; 5046 } 5047 sp->hisauth.name_len = cfg->hisname_length - 1; 5048 sp->hisauth.name[sp->hisauth.name_len] = 0; 5049 } 5050 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5051 if (cfg->hissecret_length >= MCLBYTES) 5052 return (ENAMETOOLONG); 5053 sp->hisauth.secret = malloc(cfg->hissecret_length, M_DEVBUF, M_WAITOK); 5054 error = copyin(cfg->hissecret, sp->hisauth.secret, cfg->hissecret_length); 5055 if (error) { 5056 free(sp->hisauth.secret, M_DEVBUF); 5057 sp->hisauth.secret = NULL; 5058 return error; 5059 } 5060 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5061 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5062 } 5063 if (cfg->myname != NULL && cfg->myname_length > 0) { 5064 if (cfg->myname_length >= MCLBYTES) 5065 return (ENAMETOOLONG); 5066 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5067 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5068 if (error) { 5069 free(sp->myauth.name, M_DEVBUF); 5070 sp->myauth.name = NULL; 5071 return error; 5072 } 5073 sp->myauth.name_len = cfg->myname_length - 1; 5074 sp->myauth.name[sp->myauth.name_len] = 0; 5075 } 5076 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5077 if (cfg->mysecret_length >= MCLBYTES) 5078 return (ENAMETOOLONG); 5079 sp->myauth.secret = malloc(cfg->mysecret_length, M_DEVBUF, M_WAITOK); 5080 error = copyin(cfg->mysecret, sp->myauth.secret, cfg->mysecret_length); 5081 if (error) { 5082 free(sp->myauth.secret, M_DEVBUF); 5083 sp->myauth.secret = NULL; 5084 return error; 5085 } 5086 sp->myauth.secret_len = cfg->mysecret_length - 1; 5087 sp->myauth.secret[sp->myauth.secret_len] = 0; 5088 } 5089 sp->myauth.flags = cfg->myauthflags; 5090 if (cfg->myauth) 5091 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5092 sp->hisauth.flags = cfg->hisauthflags; 5093 if (cfg->hisauth) 5094 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5095 sp->pp_auth_failures = 0; 5096 if (sp->hisauth.proto != 0) 5097 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 5098 else 5099 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 5100 } 5101 break; 5102 case SPPPGETLCPCFG: 5103 { 5104 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5105 lcp->lcp_timeout = sp->lcp.timeout; 5106 } 5107 break; 5108 case SPPPSETLCPCFG: 5109 { 5110 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5111 sp->lcp.timeout = lcp->lcp_timeout; 5112 } 5113 break; 5114 case SPPPGETSTATUS: 5115 { 5116 struct spppstatus *status = (struct spppstatus *)data; 5117 status->phase = sp->pp_phase; 5118 } 5119 break; 5120 case SPPPGETIDLETO: 5121 { 5122 struct spppidletimeout *to = (struct spppidletimeout *)data; 5123 to->idle_seconds = sp->pp_idle_timeout; 5124 } 5125 break; 5126 case SPPPSETIDLETO: 5127 { 5128 struct spppidletimeout *to = (struct spppidletimeout *)data; 5129 sp->pp_idle_timeout = to->idle_seconds; 5130 } 5131 break; 5132 case SPPPSETAUTHFAILURE: 5133 { 5134 struct spppauthfailuresettings *afsettings = (struct spppauthfailuresettings *)data; 5135 sp->pp_max_auth_fail = afsettings->max_failures; 5136 sp->pp_auth_failures = 0; 5137 } 5138 break; 5139 case SPPPGETAUTHFAILURES: 5140 { 5141 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5142 stats->auth_failures = sp->pp_auth_failures; 5143 stats->max_failures = sp->pp_max_auth_fail; 5144 } 5145 break; 5146 case SPPPSETDNSOPTS: 5147 { 5148 struct spppdnssettings *req = (struct spppdnssettings *)data; 5149 sp->query_dns = req->query_dns & 3; 5150 } 5151 break; 5152 case SPPPGETDNSOPTS: 5153 { 5154 struct spppdnssettings *req = (struct spppdnssettings *)data; 5155 req->query_dns = sp->query_dns; 5156 } 5157 break; 5158 case SPPPGETDNSADDRS: 5159 { 5160 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; 5161 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5162 } 5163 break; 5164 default: 5165 return (EINVAL); 5166 } 5167 5168 return (0); 5169 } 5170 5171 static void 5172 sppp_phase_network(struct sppp *sp) 5173 { 5174 STDDCL; 5175 int i; 5176 u_int32_t mask; 5177 5178 sp->pp_phase = SPPP_PHASE_NETWORK; 5179 5180 if(debug) 5181 { 5182 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 5183 sppp_phase_name(sp->pp_phase)); 5184 } 5185 5186 /* Notify NCPs now. */ 5187 for (i = 0; i < IDX_COUNT; i++) 5188 if ((cps[i])->flags & CP_NCP) 5189 (cps[i])->Open(sp); 5190 5191 /* Send Up events to all NCPs. */ 5192 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5193 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) 5194 (cps[i])->Up(sp); 5195 5196 /* if no NCP is starting, all this was in vain, close down */ 5197 sppp_lcp_check_and_close(sp); 5198 } 5199 5200 5201 static const char * 5202 sppp_cp_type_name(u_char type) 5203 { 5204 static char buf[12]; 5205 switch (type) { 5206 case CONF_REQ: return "conf-req"; 5207 case CONF_ACK: return "conf-ack"; 5208 case CONF_NAK: return "conf-nak"; 5209 case CONF_REJ: return "conf-rej"; 5210 case TERM_REQ: return "term-req"; 5211 case TERM_ACK: return "term-ack"; 5212 case CODE_REJ: return "code-rej"; 5213 case PROTO_REJ: return "proto-rej"; 5214 case ECHO_REQ: return "echo-req"; 5215 case ECHO_REPLY: return "echo-reply"; 5216 case DISC_REQ: return "discard-req"; 5217 } 5218 sprintf (buf, "0x%x", type); 5219 return buf; 5220 } 5221 5222 static const char * 5223 sppp_auth_type_name(u_short proto, u_char type) 5224 { 5225 static char buf[12]; 5226 switch (proto) { 5227 case PPP_CHAP: 5228 switch (type) { 5229 case CHAP_CHALLENGE: return "challenge"; 5230 case CHAP_RESPONSE: return "response"; 5231 case CHAP_SUCCESS: return "success"; 5232 case CHAP_FAILURE: return "failure"; 5233 } 5234 case PPP_PAP: 5235 switch (type) { 5236 case PAP_REQ: return "req"; 5237 case PAP_ACK: return "ack"; 5238 case PAP_NAK: return "nak"; 5239 } 5240 } 5241 sprintf (buf, "0x%x", type); 5242 return buf; 5243 } 5244 5245 static const char * 5246 sppp_lcp_opt_name(u_char opt) 5247 { 5248 static char buf[12]; 5249 switch (opt) { 5250 case LCP_OPT_MRU: return "mru"; 5251 case LCP_OPT_ASYNC_MAP: return "async-map"; 5252 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 5253 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 5254 case LCP_OPT_MAGIC: return "magic"; 5255 case LCP_OPT_PROTO_COMP: return "proto-comp"; 5256 case LCP_OPT_ADDR_COMP: return "addr-comp"; 5257 } 5258 sprintf (buf, "0x%x", opt); 5259 return buf; 5260 } 5261 5262 static const char * 5263 sppp_ipcp_opt_name(u_char opt) 5264 { 5265 static char buf[12]; 5266 switch (opt) { 5267 case IPCP_OPT_ADDRESSES: return "addresses"; 5268 case IPCP_OPT_COMPRESSION: return "compression"; 5269 case IPCP_OPT_ADDRESS: return "address"; 5270 } 5271 sprintf (buf, "0x%x", opt); 5272 return buf; 5273 } 5274 5275 #ifdef INET6 5276 static const char * 5277 sppp_ipv6cp_opt_name(u_char opt) 5278 { 5279 static char buf[12]; 5280 switch (opt) { 5281 case IPV6CP_OPT_IFID: return "ifid"; 5282 case IPV6CP_OPT_COMPRESSION: return "compression"; 5283 } 5284 sprintf (buf, "0x%x", opt); 5285 return buf; 5286 } 5287 #endif 5288 5289 static const char * 5290 sppp_state_name(int state) 5291 { 5292 switch (state) { 5293 case STATE_INITIAL: return "initial"; 5294 case STATE_STARTING: return "starting"; 5295 case STATE_CLOSED: return "closed"; 5296 case STATE_STOPPED: return "stopped"; 5297 case STATE_CLOSING: return "closing"; 5298 case STATE_STOPPING: return "stopping"; 5299 case STATE_REQ_SENT: return "req-sent"; 5300 case STATE_ACK_RCVD: return "ack-rcvd"; 5301 case STATE_ACK_SENT: return "ack-sent"; 5302 case STATE_OPENED: return "opened"; 5303 } 5304 return "illegal"; 5305 } 5306 5307 static const char * 5308 sppp_phase_name(int phase) 5309 { 5310 switch (phase) { 5311 case SPPP_PHASE_DEAD: return "dead"; 5312 case SPPP_PHASE_ESTABLISH: return "establish"; 5313 case SPPP_PHASE_TERMINATE: return "terminate"; 5314 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 5315 case SPPP_PHASE_NETWORK: return "network"; 5316 } 5317 return "illegal"; 5318 } 5319 5320 static const char * 5321 sppp_proto_name(u_short proto) 5322 { 5323 static char buf[12]; 5324 switch (proto) { 5325 case PPP_LCP: return "lcp"; 5326 case PPP_IPCP: return "ipcp"; 5327 case PPP_PAP: return "pap"; 5328 case PPP_CHAP: return "chap"; 5329 case PPP_IPV6CP: return "ipv6cp"; 5330 } 5331 sprintf(buf, "0x%x", (unsigned)proto); 5332 return buf; 5333 } 5334 5335 static void 5336 sppp_print_bytes(const u_char *p, u_short len) 5337 { 5338 addlog(" %02x", *p++); 5339 while (--len > 0) 5340 addlog("-%02x", *p++); 5341 } 5342 5343 static void 5344 sppp_print_string(const char *p, u_short len) 5345 { 5346 u_char c; 5347 5348 while (len-- > 0) { 5349 c = *p++; 5350 /* 5351 * Print only ASCII chars directly. RFC 1994 recommends 5352 * using only them, but we don't rely on it. */ 5353 if (c < ' ' || c > '~') 5354 addlog("\\x%x", c); 5355 else 5356 addlog("%c", c); 5357 } 5358 } 5359 5360 static const char * 5361 sppp_dotted_quad(u_int32_t addr) 5362 { 5363 static char s[16]; 5364 sprintf(s, "%d.%d.%d.%d", 5365 (int)((addr >> 24) & 0xff), 5366 (int)((addr >> 16) & 0xff), 5367 (int)((addr >> 8) & 0xff), 5368 (int)(addr & 0xff)); 5369 return s; 5370 } 5371 5372 /* a dummy, used to drop uninteresting events */ 5373 static void 5374 sppp_null(struct sppp *unused) 5375 { 5376 /* do just nothing */ 5377 } 5378 /* 5379 * This file is large. Tell emacs to highlight it nevertheless. 5380 * 5381 * Local Variables: 5382 * hilit-auto-highlight-maxout: 120000 5383 * End: 5384 */ 5385
Indexes created Mon Sep 29 21:09:56 GMT 2025