if_spppsubr.c revision 1.58
1 /* $NetBSD: if_spppsubr.c,v 1.58 2002/09/11 05:36:27 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 1.58 2002/09/11 05:36:27 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, 1348 ntohs (lh->len)); 1349 if (len) 1350 sppp_print_bytes ((u_char*) (lh+1), len); 1351 addlog(">\n"); 1352 } 1353 if (IF_QFULL (&sp->pp_cpq)) { 1354 IF_DROP (&sp->pp_fastq); 1355 IF_DROP (&ifp->if_snd); 1356 m_freem (m); 1357 ++ifp->if_oerrors; 1358 return; 1359 } else 1360 IF_ENQUEUE (&sp->pp_cpq, m); 1361 if (! (ifp->if_flags & IFF_OACTIVE)) 1362 (*ifp->if_start) (ifp); 1363 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1364 } 1365 1366 /* 1367 * Handle incoming PPP control protocol packets. 1368 */ 1369 static void 1370 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1371 { 1372 STDDCL; 1373 struct lcp_header *h; 1374 int len = m->m_pkthdr.len; 1375 int rv; 1376 u_char *p; 1377 u_int32_t u32; 1378 1379 if (len < 4) { 1380 if (debug) 1381 log(LOG_DEBUG, 1382 SPP_FMT "%s invalid packet length: %d bytes\n", 1383 SPP_ARGS(ifp), cp->name, len); 1384 return; 1385 } 1386 h = mtod (m, struct lcp_header*); 1387 if (debug) { 1388 log(LOG_DEBUG, 1389 SPP_FMT "%s input(%s): <%s id=0x%x len=%d", 1390 SPP_ARGS(ifp), cp->name, 1391 sppp_state_name(sp->state[cp->protoidx]), 1392 sppp_cp_type_name (h->type), h->ident, ntohs (h->len)); 1393 if (len > 4) 1394 sppp_print_bytes ((u_char*) (h+1), len-4); 1395 addlog(">\n"); 1396 } 1397 if (len > ntohs (h->len)) 1398 len = ntohs (h->len); 1399 p = (u_char *)(h + 1); 1400 switch (h->type) { 1401 case CONF_REQ: 1402 if (len < 4) { 1403 if (debug) 1404 addlog(SPP_FMT "%s invalid conf-req length %d\n", 1405 SPP_ARGS(ifp), cp->name, 1406 len); 1407 ++ifp->if_ierrors; 1408 break; 1409 } 1410 /* handle states where RCR doesn't get a SCA/SCN */ 1411 switch (sp->state[cp->protoidx]) { 1412 case STATE_CLOSING: 1413 case STATE_STOPPING: 1414 return; 1415 case STATE_CLOSED: 1416 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1417 0, 0); 1418 return; 1419 } 1420 rv = (cp->RCR)(sp, h, len); 1421 switch (sp->state[cp->protoidx]) { 1422 case STATE_OPENED: 1423 (cp->tld)(sp); 1424 (cp->scr)(sp); 1425 /* fall through... */ 1426 case STATE_ACK_SENT: 1427 case STATE_REQ_SENT: 1428 sppp_cp_change_state(cp, sp, rv? 1429 STATE_ACK_SENT: STATE_REQ_SENT); 1430 break; 1431 case STATE_STOPPED: 1432 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1433 (cp->scr)(sp); 1434 sppp_cp_change_state(cp, sp, rv? 1435 STATE_ACK_SENT: STATE_REQ_SENT); 1436 break; 1437 case STATE_ACK_RCVD: 1438 if (rv) { 1439 sppp_cp_change_state(cp, sp, STATE_OPENED); 1440 if (debug) 1441 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1442 SPP_ARGS(ifp), 1443 cp->name); 1444 (cp->tlu)(sp); 1445 } else 1446 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1447 break; 1448 default: 1449 printf(SPP_FMT "%s illegal %s in state %s\n", 1450 SPP_ARGS(ifp), cp->name, 1451 sppp_cp_type_name(h->type), 1452 sppp_state_name(sp->state[cp->protoidx])); 1453 ++ifp->if_ierrors; 1454 } 1455 break; 1456 case CONF_ACK: 1457 if (h->ident != sp->confid[cp->protoidx]) { 1458 if (debug) 1459 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1460 SPP_ARGS(ifp), cp->name, 1461 h->ident, sp->confid[cp->protoidx]); 1462 ++ifp->if_ierrors; 1463 break; 1464 } 1465 switch (sp->state[cp->protoidx]) { 1466 case STATE_CLOSED: 1467 case STATE_STOPPED: 1468 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1469 break; 1470 case STATE_CLOSING: 1471 case STATE_STOPPING: 1472 break; 1473 case STATE_REQ_SENT: 1474 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1475 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1476 break; 1477 case STATE_OPENED: 1478 (cp->tld)(sp); 1479 /* fall through */ 1480 case STATE_ACK_RCVD: 1481 (cp->scr)(sp); 1482 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1483 break; 1484 case STATE_ACK_SENT: 1485 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1486 sppp_cp_change_state(cp, sp, STATE_OPENED); 1487 if (debug) 1488 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1489 SPP_ARGS(ifp), cp->name); 1490 (cp->tlu)(sp); 1491 break; 1492 default: 1493 printf(SPP_FMT "%s illegal %s in state %s\n", 1494 SPP_ARGS(ifp), cp->name, 1495 sppp_cp_type_name(h->type), 1496 sppp_state_name(sp->state[cp->protoidx])); 1497 ++ifp->if_ierrors; 1498 } 1499 break; 1500 case CONF_NAK: 1501 case CONF_REJ: 1502 if (h->ident != sp->confid[cp->protoidx]) { 1503 if (debug) 1504 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1505 SPP_ARGS(ifp), cp->name, 1506 h->ident, sp->confid[cp->protoidx]); 1507 ++ifp->if_ierrors; 1508 break; 1509 } 1510 if (h->type == CONF_NAK) 1511 (cp->RCN_nak)(sp, h, len); 1512 else /* CONF_REJ */ 1513 (cp->RCN_rej)(sp, h, len); 1514 1515 switch (sp->state[cp->protoidx]) { 1516 case STATE_CLOSED: 1517 case STATE_STOPPED: 1518 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1519 break; 1520 case STATE_REQ_SENT: 1521 case STATE_ACK_SENT: 1522 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1523 (cp->scr)(sp); 1524 break; 1525 case STATE_OPENED: 1526 (cp->tld)(sp); 1527 /* fall through */ 1528 case STATE_ACK_RCVD: 1529 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1530 (cp->scr)(sp); 1531 break; 1532 case STATE_CLOSING: 1533 case STATE_STOPPING: 1534 break; 1535 default: 1536 printf(SPP_FMT "%s illegal %s in state %s\n", 1537 SPP_ARGS(ifp), cp->name, 1538 sppp_cp_type_name(h->type), 1539 sppp_state_name(sp->state[cp->protoidx])); 1540 ++ifp->if_ierrors; 1541 } 1542 break; 1543 1544 case TERM_REQ: 1545 switch (sp->state[cp->protoidx]) { 1546 case STATE_ACK_RCVD: 1547 case STATE_ACK_SENT: 1548 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1549 /* fall through */ 1550 case STATE_CLOSED: 1551 case STATE_STOPPED: 1552 case STATE_CLOSING: 1553 case STATE_STOPPING: 1554 case STATE_REQ_SENT: 1555 sta: 1556 /* Send Terminate-Ack packet. */ 1557 if (debug) 1558 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n", 1559 SPP_ARGS(ifp), cp->name); 1560 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1561 break; 1562 case STATE_OPENED: 1563 (cp->tld)(sp); 1564 sp->rst_counter[cp->protoidx] = 0; 1565 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1566 goto sta; 1567 break; 1568 default: 1569 printf(SPP_FMT "%s illegal %s in state %s\n", 1570 SPP_ARGS(ifp), cp->name, 1571 sppp_cp_type_name(h->type), 1572 sppp_state_name(sp->state[cp->protoidx])); 1573 ++ifp->if_ierrors; 1574 } 1575 break; 1576 case TERM_ACK: 1577 switch (sp->state[cp->protoidx]) { 1578 case STATE_CLOSED: 1579 case STATE_STOPPED: 1580 case STATE_REQ_SENT: 1581 case STATE_ACK_SENT: 1582 break; 1583 case STATE_CLOSING: 1584 (cp->tlf)(sp); 1585 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1586 sppp_lcp_check_and_close(sp); 1587 break; 1588 case STATE_STOPPING: 1589 (cp->tlf)(sp); 1590 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1591 sppp_lcp_check_and_close(sp); 1592 break; 1593 case STATE_ACK_RCVD: 1594 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1595 break; 1596 case STATE_OPENED: 1597 (cp->tld)(sp); 1598 (cp->scr)(sp); 1599 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1600 break; 1601 default: 1602 printf(SPP_FMT "%s illegal %s in state %s\n", 1603 SPP_ARGS(ifp), cp->name, 1604 sppp_cp_type_name(h->type), 1605 sppp_state_name(sp->state[cp->protoidx])); 1606 ++ifp->if_ierrors; 1607 } 1608 break; 1609 case CODE_REJ: 1610 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1611 log(LOG_INFO, 1612 SPP_FMT "%s: ignoring RXJ (%s) for code ?, " 1613 "danger will robinson\n", 1614 SPP_ARGS(ifp), cp->name, 1615 sppp_cp_type_name(h->type)); 1616 switch (sp->state[cp->protoidx]) { 1617 case STATE_CLOSED: 1618 case STATE_STOPPED: 1619 case STATE_REQ_SENT: 1620 case STATE_ACK_SENT: 1621 case STATE_CLOSING: 1622 case STATE_STOPPING: 1623 case STATE_OPENED: 1624 break; 1625 case STATE_ACK_RCVD: 1626 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1627 break; 1628 default: 1629 printf(SPP_FMT "%s illegal %s in state %s\n", 1630 SPP_ARGS(ifp), cp->name, 1631 sppp_cp_type_name(h->type), 1632 sppp_state_name(sp->state[cp->protoidx])); 1633 ++ifp->if_ierrors; 1634 } 1635 break; 1636 case PROTO_REJ: 1637 { 1638 int catastrophic; 1639 const struct cp *upper; 1640 int i; 1641 u_int16_t proto; 1642 1643 catastrophic = 0; 1644 upper = NULL; 1645 proto = p[0] << 8 | p[1]; 1646 for (i = 0; i < IDX_COUNT; i++) { 1647 if (cps[i]->proto == proto) { 1648 upper = cps[i]; 1649 break; 1650 } 1651 } 1652 if (upper == NULL) 1653 catastrophic++; 1654 1655 if (debug) 1656 log(LOG_INFO, 1657 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1658 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+', 1659 sppp_cp_type_name(h->type), proto, 1660 upper ? upper->name : "unknown", 1661 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1662 1663 /* 1664 * if we got RXJ+ against conf-req, the peer does not implement 1665 * this particular protocol type. terminate the protocol. 1666 */ 1667 if (upper && !catastrophic) { 1668 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1669 upper->Close(sp); 1670 break; 1671 } 1672 } 1673 1674 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1675 switch (sp->state[cp->protoidx]) { 1676 case STATE_CLOSED: 1677 case STATE_STOPPED: 1678 case STATE_REQ_SENT: 1679 case STATE_ACK_SENT: 1680 case STATE_CLOSING: 1681 case STATE_STOPPING: 1682 case STATE_OPENED: 1683 break; 1684 case STATE_ACK_RCVD: 1685 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1686 break; 1687 default: 1688 printf(SPP_FMT "%s illegal %s in state %s\n", 1689 SPP_ARGS(ifp), cp->name, 1690 sppp_cp_type_name(h->type), 1691 sppp_state_name(sp->state[cp->protoidx])); 1692 ++ifp->if_ierrors; 1693 } 1694 break; 1695 } 1696 case DISC_REQ: 1697 if (cp->proto != PPP_LCP) 1698 goto illegal; 1699 /* Discard the packet. */ 1700 break; 1701 case ECHO_REQ: 1702 if (cp->proto != PPP_LCP) 1703 goto illegal; 1704 if (sp->state[cp->protoidx] != STATE_OPENED) { 1705 if (debug) 1706 addlog(SPP_FMT "lcp echo req but lcp closed\n", 1707 SPP_ARGS(ifp)); 1708 ++ifp->if_ierrors; 1709 break; 1710 } 1711 if (len < 8) { 1712 if (debug) 1713 addlog(SPP_FMT "invalid lcp echo request " 1714 "packet length: %d bytes\n", 1715 SPP_ARGS(ifp), len); 1716 break; 1717 } 1718 memcpy(&u32, h + 1, sizeof u32); 1719 if (ntohl(u32) == sp->lcp.magic) { 1720 /* Line loopback mode detected. */ 1721 printf(SPP_FMT "loopback\n", SPP_ARGS(ifp)); 1722 if_down (ifp); 1723 IF_PURGE (&sp->pp_cpq); 1724 1725 /* Shut down the PPP link. */ 1726 /* XXX */ 1727 lcp.Down(sp); 1728 lcp.Up(sp); 1729 break; 1730 } 1731 u32 = htonl(sp->lcp.magic); 1732 memcpy(h + 1, &u32, sizeof u32); 1733 if (debug) 1734 addlog(SPP_FMT "got lcp echo req, sending echo rep\n", 1735 SPP_ARGS(ifp)); 1736 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, 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, 2341 h->ident, origlen, h+1); 2342 } 2343 2344 end: 2345 free (buf, M_TEMP); 2346 return (rlen == 0); 2347 } 2348 2349 /* 2350 * Analyze the LCP Configure-Reject option list, and adjust our 2351 * negotiation. 2352 */ 2353 static void 2354 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2355 { 2356 STDDCL; 2357 u_char *buf, *p; 2358 2359 len -= 4; 2360 buf = malloc (len, M_TEMP, M_NOWAIT); 2361 if (!buf) 2362 return; 2363 2364 if (debug) 2365 log(LOG_DEBUG, SPP_FMT "lcp rej opts:", 2366 SPP_ARGS(ifp)); 2367 2368 p = (void*) (h+1); 2369 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2370 if (debug) 2371 addlog(" %s", sppp_lcp_opt_name(*p)); 2372 switch (*p) { 2373 case LCP_OPT_MAGIC: 2374 /* Magic number -- can't use it, use 0 */ 2375 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2376 sp->lcp.magic = 0; 2377 break; 2378 case LCP_OPT_MRU: 2379 /* 2380 * Should not be rejected anyway, since we only 2381 * negotiate a MRU if explicitly requested by 2382 * peer. 2383 */ 2384 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2385 break; 2386 case LCP_OPT_AUTH_PROTO: 2387 /* 2388 * Peer doesn't want to authenticate himself, 2389 * deny unless this is a dialout call, and 2390 * SPPP_AUTHFLAG_NOCALLOUT is set. 2391 */ 2392 if ((sp->pp_flags & PP_CALLIN) == 0 && 2393 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2394 if (debug) 2395 addlog(" [don't insist on auth " 2396 "for callout]"); 2397 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2398 break; 2399 } 2400 if (debug) 2401 addlog("[access denied]\n"); 2402 lcp.Close(sp); 2403 break; 2404 } 2405 } 2406 if (debug) 2407 addlog("\n"); 2408 free (buf, M_TEMP); 2409 return; 2410 } 2411 2412 /* 2413 * Analyze the LCP Configure-NAK option list, and adjust our 2414 * negotiation. 2415 */ 2416 static void 2417 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2418 { 2419 STDDCL; 2420 u_char *buf, *p; 2421 u_int32_t magic; 2422 2423 len -= 4; 2424 buf = malloc (len, M_TEMP, M_NOWAIT); 2425 if (!buf) 2426 return; 2427 2428 if (debug) 2429 log(LOG_DEBUG, SPP_FMT "lcp nak opts:", 2430 SPP_ARGS(ifp)); 2431 2432 p = (void*) (h+1); 2433 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2434 if (debug) 2435 addlog(" %s", sppp_lcp_opt_name(*p)); 2436 switch (*p) { 2437 case LCP_OPT_MAGIC: 2438 /* Magic number -- renegotiate */ 2439 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2440 len >= 6 && p[1] == 6) { 2441 magic = (u_int32_t)p[2] << 24 | 2442 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2443 /* 2444 * If the remote magic is our negated one, 2445 * this looks like a loopback problem. 2446 * Suggest a new magic to make sure. 2447 */ 2448 if (magic == ~sp->lcp.magic) { 2449 if (debug) 2450 addlog(" magic glitch"); 2451 sp->lcp.magic = random(); 2452 } else { 2453 sp->lcp.magic = magic; 2454 if (debug) 2455 addlog(" %d", magic); 2456 } 2457 } 2458 break; 2459 case LCP_OPT_MRU: 2460 /* 2461 * Peer wants to advise us to negotiate an MRU. 2462 * Agree on it if it's reasonable, or use 2463 * default otherwise. 2464 */ 2465 if (len >= 4 && p[1] == 4) { 2466 u_int mru = p[2] * 256 + p[3]; 2467 if (debug) 2468 addlog(" %d", mru); 2469 if (mru < PP_MTU || mru > PP_MAX_MRU) 2470 mru = PP_MTU; 2471 sp->lcp.mru = mru; 2472 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2473 } 2474 break; 2475 case LCP_OPT_AUTH_PROTO: 2476 /* 2477 * Peer doesn't like our authentication method, 2478 * deny. 2479 */ 2480 if (debug) 2481 addlog("[access denied]\n"); 2482 lcp.Close(sp); 2483 break; 2484 } 2485 } 2486 if (debug) 2487 addlog("\n"); 2488 free (buf, M_TEMP); 2489 return; 2490 } 2491 2492 static void 2493 sppp_lcp_tlu(struct sppp *sp) 2494 { 2495 STDDCL; 2496 int i; 2497 u_int32_t mask; 2498 2499 /* XXX ? */ 2500 if (! (ifp->if_flags & IFF_UP) && 2501 (ifp->if_flags & IFF_RUNNING)) { 2502 /* Coming out of loopback mode. */ 2503 if_up(ifp); 2504 } 2505 2506 for (i = 0; i < IDX_COUNT; i++) 2507 if ((cps[i])->flags & CP_QUAL) 2508 (cps[i])->Open(sp); 2509 2510 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2511 (sp->pp_flags & PP_NEEDAUTH) != 0) 2512 sp->pp_phase = SPPP_PHASE_AUTHENTICATE; 2513 else 2514 sp->pp_phase = SPPP_PHASE_NETWORK; 2515 2516 if(debug) 2517 { 2518 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2519 sppp_phase_name(sp->pp_phase)); 2520 } 2521 2522 /* 2523 * Open all authentication protocols. This is even required 2524 * if we already proceeded to network phase, since it might be 2525 * that remote wants us to authenticate, so we might have to 2526 * send a PAP request. Undesired authentication protocols 2527 * don't do anything when they get an Open event. 2528 */ 2529 for (i = 0; i < IDX_COUNT; i++) 2530 if ((cps[i])->flags & CP_AUTH) 2531 (cps[i])->Open(sp); 2532 2533 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2534 /* Notify all NCPs. */ 2535 for (i = 0; i < IDX_COUNT; i++) 2536 if ((cps[i])->flags & CP_NCP) 2537 (cps[i])->Open(sp); 2538 } 2539 2540 /* Send Up events to all started protos. */ 2541 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2542 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) 2543 (cps[i])->Up(sp); 2544 2545 /* notify low-level driver of state change */ 2546 if (sp->pp_chg) 2547 sp->pp_chg(sp, (int)sp->pp_phase); 2548 2549 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2550 /* if no NCP is starting, close down */ 2551 sppp_lcp_check_and_close(sp); 2552 } 2553 2554 static void 2555 sppp_lcp_tld(struct sppp *sp) 2556 { 2557 STDDCL; 2558 int i; 2559 u_int32_t mask; 2560 2561 sp->pp_phase = SPPP_PHASE_TERMINATE; 2562 2563 if(debug) 2564 { 2565 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2566 sppp_phase_name(sp->pp_phase)); 2567 } 2568 2569 /* 2570 * Take upper layers down. We send the Down event first and 2571 * the Close second to prevent the upper layers from sending 2572 * ``a flurry of terminate-request packets'', as the RFC 2573 * describes it. 2574 */ 2575 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2576 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2577 (cps[i])->Down(sp); 2578 (cps[i])->Close(sp); 2579 } 2580 } 2581 2582 static void 2583 sppp_lcp_tls(struct sppp *sp) 2584 { 2585 STDDCL; 2586 2587 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2588 printf("%s: authentication failed %d times, not retrying again\n", 2589 sp->pp_if.if_xname, sp->pp_auth_failures); 2590 if_down(&sp->pp_if); 2591 return; 2592 } 2593 2594 sp->pp_phase = SPPP_PHASE_ESTABLISH; 2595 2596 if(debug) 2597 { 2598 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2599 sppp_phase_name(sp->pp_phase)); 2600 } 2601 2602 /* Notify lower layer if desired. */ 2603 if (sp->pp_tls) 2604 (sp->pp_tls)(sp); 2605 } 2606 2607 static void 2608 sppp_lcp_tlf(struct sppp *sp) 2609 { 2610 STDDCL; 2611 2612 sp->pp_phase = SPPP_PHASE_DEAD; 2613 2614 if(debug) 2615 { 2616 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2617 sppp_phase_name(sp->pp_phase)); 2618 } 2619 2620 /* Notify lower layer if desired. */ 2621 if (sp->pp_tlf) 2622 (sp->pp_tlf)(sp); 2623 } 2624 2625 static void 2626 sppp_lcp_scr(struct sppp *sp) 2627 { 2628 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2629 int i = 0; 2630 u_short authproto; 2631 2632 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2633 if (! sp->lcp.magic) 2634 sp->lcp.magic = random(); 2635 opt[i++] = LCP_OPT_MAGIC; 2636 opt[i++] = 6; 2637 opt[i++] = sp->lcp.magic >> 24; 2638 opt[i++] = sp->lcp.magic >> 16; 2639 opt[i++] = sp->lcp.magic >> 8; 2640 opt[i++] = sp->lcp.magic; 2641 } 2642 2643 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2644 opt[i++] = LCP_OPT_MRU; 2645 opt[i++] = 4; 2646 opt[i++] = sp->lcp.mru >> 8; 2647 opt[i++] = sp->lcp.mru; 2648 } 2649 2650 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2651 authproto = sp->hisauth.proto; 2652 opt[i++] = LCP_OPT_AUTH_PROTO; 2653 opt[i++] = authproto == PPP_CHAP? 5: 4; 2654 opt[i++] = authproto >> 8; 2655 opt[i++] = authproto; 2656 if (authproto == PPP_CHAP) 2657 opt[i++] = CHAP_MD5; 2658 } 2659 2660 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2661 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2662 } 2663 2664 /* 2665 * Check the open NCPs, return true if at least one NCP is open. 2666 */ 2667 static int 2668 sppp_ncp_check(struct sppp *sp) 2669 { 2670 int i, mask; 2671 2672 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2673 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2674 return 1; 2675 return 0; 2676 } 2677 2678 /* 2679 * Re-check the open NCPs and see if we should terminate the link. 2680 * Called by the NCPs during their tlf action handling. 2681 */ 2682 static void 2683 sppp_lcp_check_and_close(struct sppp *sp) 2684 { 2685 2686 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2687 /* don't bother, we are already going down */ 2688 return; 2689 2690 if (sppp_ncp_check(sp)) 2691 return; 2692 2693 lcp.Close(sp); 2694 } 2695 2696 2697 /* 2698 *--------------------------------------------------------------------------* 2699 * * 2700 * The IPCP implementation. * 2701 * * 2702 *--------------------------------------------------------------------------* 2703 */ 2704 2705 static void 2706 sppp_ipcp_init(struct sppp *sp) 2707 { 2708 sp->ipcp.opts = 0; 2709 sp->ipcp.flags = 0; 2710 sp->state[IDX_IPCP] = STATE_INITIAL; 2711 sp->fail_counter[IDX_IPCP] = 0; 2712 sp->pp_seq[IDX_IPCP] = 0; 2713 sp->pp_rseq[IDX_IPCP] = 0; 2714 callout_init(&sp->ch[IDX_IPCP]); 2715 } 2716 2717 static void 2718 sppp_ipcp_up(struct sppp *sp) 2719 { 2720 sppp_up_event(&ipcp, sp); 2721 } 2722 2723 static void 2724 sppp_ipcp_down(struct sppp *sp) 2725 { 2726 sppp_down_event(&ipcp, sp); 2727 } 2728 2729 static void 2730 sppp_ipcp_open(struct sppp *sp) 2731 { 2732 STDDCL; 2733 u_int32_t myaddr, hisaddr; 2734 2735 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 2736 sp->ipcp.req_myaddr = 0; 2737 sp->ipcp.req_hisaddr = 0; 2738 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 2739 2740 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 2741 /* 2742 * If we don't have his address, this probably means our 2743 * interface doesn't want to talk IP at all. (This could 2744 * be the case if somebody wants to speak only IPX, for 2745 * example.) Don't open IPCP in this case. 2746 */ 2747 if (hisaddr == 0L) { 2748 /* XXX this message should go away */ 2749 if (debug) 2750 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n", 2751 SPP_ARGS(ifp)); 2752 return; 2753 } 2754 2755 if (myaddr == 0) { 2756 /* 2757 * I don't have an assigned address, so i need to 2758 * negotiate my address. 2759 */ 2760 sp->ipcp.flags |= IPCP_MYADDR_DYN; 2761 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2762 } 2763 if (hisaddr == 1) { 2764 /* 2765 * XXX - remove this hack! 2766 * remote has no valid adress, we need to get one assigned. 2767 */ 2768 sp->ipcp.flags |= IPCP_HISADDR_DYN; 2769 } 2770 sppp_open_event(&ipcp, sp); 2771 } 2772 2773 static void 2774 sppp_ipcp_close(struct sppp *sp) 2775 { 2776 sppp_close_event(&ipcp, sp); 2777 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 2778 /* 2779 * Some address was dynamic, clear it again. 2780 */ 2781 sppp_clear_ip_addrs(sp); 2782 } 2783 2784 static void 2785 sppp_ipcp_TO(void *cookie) 2786 { 2787 sppp_to_event(&ipcp, (struct sppp *)cookie); 2788 } 2789 2790 /* 2791 * Analyze a configure request. Return true if it was agreeable, and 2792 * caused action sca, false if it has been rejected or nak'ed, and 2793 * caused action scn. (The return value is used to make the state 2794 * transition decision in the state automaton.) 2795 */ 2796 static int 2797 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2798 { 2799 u_char *buf, *r, *p; 2800 struct ifnet *ifp = &sp->pp_if; 2801 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 2802 u_int32_t hisaddr, desiredaddr; 2803 2804 len -= 4; 2805 origlen = len; 2806 /* 2807 * Make sure to allocate a buf that can at least hold a 2808 * conf-nak with an `address' option. We might need it below. 2809 */ 2810 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 2811 if (! buf) 2812 return (0); 2813 2814 /* pass 1: see if we can recognize them */ 2815 if (debug) 2816 log(LOG_DEBUG, SPP_FMT "ipcp parse opts:", 2817 SPP_ARGS(ifp)); 2818 p = (void*) (h+1); 2819 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2820 if (debug) 2821 addlog(" %s", sppp_ipcp_opt_name(*p)); 2822 switch (*p) { 2823 #ifdef notyet 2824 case IPCP_OPT_COMPRESSION: 2825 if (len >= 6 && p[1] >= 6) { 2826 /* correctly formed compress option */ 2827 continue; 2828 } 2829 if (debug) 2830 addlog(" [invalid]"); 2831 break; 2832 #endif 2833 case IPCP_OPT_ADDRESS: 2834 if (len >= 6 && p[1] == 6) { 2835 /* correctly formed address option */ 2836 continue; 2837 } 2838 if (debug) 2839 addlog(" [invalid]"); 2840 break; 2841 default: 2842 /* Others not supported. */ 2843 if (debug) 2844 addlog(" [rej]"); 2845 break; 2846 } 2847 /* Add the option to rejected list. */ 2848 bcopy (p, r, p[1]); 2849 r += p[1]; 2850 rlen += p[1]; 2851 } 2852 if (rlen) { 2853 if (debug) 2854 addlog(" send conf-rej\n"); 2855 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 2856 goto end; 2857 } else if (debug) 2858 addlog("\n"); 2859 2860 /* pass 2: parse option values */ 2861 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 2862 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 2863 else 2864 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 2865 if (debug) 2866 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ", 2867 SPP_ARGS(ifp)); 2868 p = (void*) (h+1); 2869 len = origlen; 2870 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2871 if (debug) 2872 addlog(" %s", sppp_ipcp_opt_name(*p)); 2873 switch (*p) { 2874 #ifdef notyet 2875 case IPCP_OPT_COMPRESSION: 2876 continue; 2877 #endif 2878 case IPCP_OPT_ADDRESS: 2879 desiredaddr = p[2] << 24 | p[3] << 16 | 2880 p[4] << 8 | p[5]; 2881 if (desiredaddr == hisaddr || 2882 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 2883 /* 2884 * Peer's address is same as our value, 2885 * this is agreeable. Gonna conf-ack 2886 * it. 2887 */ 2888 if (debug) 2889 addlog(" %s [ack]", 2890 sppp_dotted_quad(hisaddr)); 2891 /* record that we've seen it already */ 2892 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 2893 sp->ipcp.req_hisaddr = desiredaddr; 2894 hisaddr = desiredaddr; 2895 continue; 2896 } 2897 /* 2898 * The address wasn't agreeable. This is either 2899 * he sent us 0.0.0.0, asking to assign him an 2900 * address, or he send us another address not 2901 * matching our value. Either case, we gonna 2902 * conf-nak it with our value. 2903 */ 2904 if (debug) { 2905 if (desiredaddr == 0) 2906 addlog(" [addr requested]"); 2907 else 2908 addlog(" %s [not agreed]", 2909 sppp_dotted_quad(desiredaddr)); 2910 } 2911 2912 p[2] = hisaddr >> 24; 2913 p[3] = hisaddr >> 16; 2914 p[4] = hisaddr >> 8; 2915 p[5] = hisaddr; 2916 break; 2917 } 2918 /* Add the option to nak'ed list. */ 2919 bcopy (p, r, p[1]); 2920 r += p[1]; 2921 rlen += p[1]; 2922 } 2923 2924 /* 2925 * If we are about to conf-ack the request, but haven't seen 2926 * his address so far, gonna conf-nak it instead, with the 2927 * `address' option present and our idea of his address being 2928 * filled in there, to request negotiation of both addresses. 2929 * 2930 * XXX This can result in an endless req - nak loop if peer 2931 * doesn't want to send us his address. Q: What should we do 2932 * about it? XXX A: implement the max-failure counter. 2933 */ 2934 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 2935 buf[0] = IPCP_OPT_ADDRESS; 2936 buf[1] = 6; 2937 buf[2] = hisaddr >> 24; 2938 buf[3] = hisaddr >> 16; 2939 buf[4] = hisaddr >> 8; 2940 buf[5] = hisaddr; 2941 rlen = 6; 2942 if (debug) 2943 addlog(" still need hisaddr"); 2944 } 2945 2946 if (rlen) { 2947 if (debug) 2948 addlog(" send conf-nak\n"); 2949 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 2950 } else { 2951 if (debug) 2952 addlog(" send conf-ack\n"); 2953 sppp_cp_send (sp, PPP_IPCP, CONF_ACK, 2954 h->ident, origlen, h+1); 2955 } 2956 2957 end: 2958 free (buf, M_TEMP); 2959 return (rlen == 0); 2960 } 2961 2962 /* 2963 * Analyze the IPCP Configure-Reject option list, and adjust our 2964 * negotiation. 2965 */ 2966 static void 2967 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2968 { 2969 u_char *buf, *p; 2970 struct ifnet *ifp = &sp->pp_if; 2971 int debug = ifp->if_flags & IFF_DEBUG; 2972 2973 len -= 4; 2974 buf = malloc (len, M_TEMP, M_NOWAIT); 2975 if (!buf) 2976 return; 2977 2978 if (debug) 2979 log(LOG_DEBUG, SPP_FMT "ipcp rej opts:", 2980 SPP_ARGS(ifp)); 2981 2982 p = (void*) (h+1); 2983 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2984 if (debug) 2985 addlog(" %s", sppp_ipcp_opt_name(*p)); 2986 switch (*p) { 2987 case IPCP_OPT_ADDRESS: 2988 /* 2989 * Peer doesn't grok address option. This is 2990 * bad. XXX Should we better give up here? 2991 */ 2992 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 2993 break; 2994 #ifdef notyet 2995 case IPCP_OPT_COMPRESS: 2996 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 2997 break; 2998 #endif 2999 } 3000 } 3001 if (debug) 3002 addlog("\n"); 3003 free (buf, M_TEMP); 3004 return; 3005 } 3006 3007 /* 3008 * Analyze the IPCP Configure-NAK option list, and adjust our 3009 * negotiation. 3010 */ 3011 static void 3012 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3013 { 3014 u_char *p; 3015 struct ifnet *ifp = &sp->pp_if; 3016 int debug = ifp->if_flags & IFF_DEBUG; 3017 u_int32_t wantaddr; 3018 3019 len -= 4; 3020 3021 if (debug) 3022 log(LOG_DEBUG, SPP_FMT "ipcp nak opts:", 3023 SPP_ARGS(ifp)); 3024 3025 p = (void*) (h+1); 3026 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3027 if (debug) 3028 addlog(" %s", sppp_ipcp_opt_name(*p)); 3029 switch (*p) { 3030 case IPCP_OPT_ADDRESS: 3031 /* 3032 * Peer doesn't like our local IP address. See 3033 * if we can do something for him. We'll drop 3034 * him our address then. 3035 */ 3036 if (len >= 6 && p[1] == 6) { 3037 wantaddr = p[2] << 24 | p[3] << 16 | 3038 p[4] << 8 | p[5]; 3039 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3040 if (debug) 3041 addlog(" [wantaddr %s]", 3042 sppp_dotted_quad(wantaddr)); 3043 /* 3044 * When doing dynamic address assignment, 3045 * we accept his offer. Otherwise, we 3046 * ignore it and thus continue to negotiate 3047 * our already existing value. 3048 */ 3049 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3050 if (debug) 3051 addlog(" [agree]"); 3052 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3053 sp->ipcp.req_myaddr = wantaddr; 3054 } 3055 } 3056 break; 3057 3058 case IPCP_OPT_PRIMDNS: 3059 if (len >= 6 && p[1] == 6) { 3060 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3061 p[4] << 8 | p[5]; 3062 } 3063 break; 3064 3065 case IPCP_OPT_SECDNS: 3066 if (len >= 6 && p[1] == 6) { 3067 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3068 p[4] << 8 | p[5]; 3069 } 3070 break; 3071 #ifdef notyet 3072 case IPCP_OPT_COMPRESS: 3073 /* 3074 * Peer wants different compression parameters. 3075 */ 3076 break; 3077 #endif 3078 } 3079 } 3080 if (debug) 3081 addlog("\n"); 3082 return; 3083 } 3084 3085 static void 3086 sppp_ipcp_tlu(struct sppp *sp) 3087 { 3088 /* we are up. Set addresses and notify anyone interested */ 3089 u_int32_t myaddr, hisaddr; 3090 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3091 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 3092 myaddr = sp->ipcp.req_myaddr; 3093 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 3094 hisaddr = sp->ipcp.req_hisaddr; 3095 sppp_set_ip_addrs(sp, myaddr, hisaddr); 3096 if (sp->pp_con) 3097 sp->pp_con(sp); 3098 } 3099 3100 static void 3101 sppp_ipcp_tld(struct sppp *sp) 3102 { 3103 } 3104 3105 static void 3106 sppp_ipcp_tls(struct sppp *sp) 3107 { 3108 /* indicate to LCP that it must stay alive */ 3109 sp->lcp.protos |= (1 << IDX_IPCP); 3110 } 3111 3112 static void 3113 sppp_ipcp_tlf(struct sppp *sp) 3114 { 3115 /* we no longer need LCP */ 3116 sp->lcp.protos &= ~(1 << IDX_IPCP); 3117 } 3118 3119 static void 3120 sppp_ipcp_scr(struct sppp *sp) 3121 { 3122 char opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3123 u_int32_t ouraddr; 3124 int i = 0; 3125 3126 #ifdef notyet 3127 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3128 opt[i++] = IPCP_OPT_COMPRESSION; 3129 opt[i++] = 6; 3130 opt[i++] = 0; /* VJ header compression */ 3131 opt[i++] = 0x2d; /* VJ header compression */ 3132 opt[i++] = max_slot_id; 3133 opt[i++] = comp_slot_id; 3134 } 3135 #endif 3136 3137 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3138 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3139 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3140 else 3141 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3142 opt[i++] = IPCP_OPT_ADDRESS; 3143 opt[i++] = 6; 3144 opt[i++] = ouraddr >> 24; 3145 opt[i++] = ouraddr >> 16; 3146 opt[i++] = ouraddr >> 8; 3147 opt[i++] = ouraddr; 3148 } 3149 3150 if (sp->query_dns & 1) { 3151 opt[i++] = IPCP_OPT_PRIMDNS; 3152 opt[i++] = 6; 3153 opt[i++] = sp->dns_addrs[0] >> 24; 3154 opt[i++] = sp->dns_addrs[0] >> 16; 3155 opt[i++] = sp->dns_addrs[0] >> 8; 3156 opt[i++] = sp->dns_addrs[0]; 3157 } 3158 if (sp->query_dns & 2) { 3159 opt[i++] = IPCP_OPT_SECDNS; 3160 opt[i++] = 6; 3161 opt[i++] = sp->dns_addrs[1] >> 24; 3162 opt[i++] = sp->dns_addrs[1] >> 16; 3163 opt[i++] = sp->dns_addrs[1] >> 8; 3164 opt[i++] = sp->dns_addrs[1]; 3165 } 3166 3167 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3168 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3169 } 3170 3171 3172 /* 3173 *--------------------------------------------------------------------------* 3174 * * 3175 * The IPv6CP implementation. * 3176 * * 3177 *--------------------------------------------------------------------------* 3178 */ 3179 3180 #ifdef INET6 3181 static void 3182 sppp_ipv6cp_init(struct sppp *sp) 3183 { 3184 sp->ipv6cp.opts = 0; 3185 sp->ipv6cp.flags = 0; 3186 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3187 sp->fail_counter[IDX_IPV6CP] = 0; 3188 sp->pp_seq[IDX_IPV6CP] = 0; 3189 sp->pp_rseq[IDX_IPV6CP] = 0; 3190 callout_init(&sp->ch[IDX_IPV6CP]); 3191 } 3192 3193 static void 3194 sppp_ipv6cp_up(struct sppp *sp) 3195 { 3196 sppp_up_event(&ipv6cp, sp); 3197 } 3198 3199 static void 3200 sppp_ipv6cp_down(struct sppp *sp) 3201 { 3202 sppp_down_event(&ipv6cp, sp); 3203 } 3204 3205 static void 3206 sppp_ipv6cp_open(struct sppp *sp) 3207 { 3208 STDDCL; 3209 struct in6_addr myaddr, hisaddr; 3210 3211 #ifdef IPV6CP_MYIFID_DYN 3212 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3213 #else 3214 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3215 #endif 3216 3217 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3218 /* 3219 * If we don't have our address, this probably means our 3220 * interface doesn't want to talk IPv6 at all. (This could 3221 * be the case if somebody wants to speak only IPX, for 3222 * example.) Don't open IPv6CP in this case. 3223 */ 3224 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3225 /* XXX this message should go away */ 3226 if (debug) 3227 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n", 3228 SPP_ARGS(ifp)); 3229 return; 3230 } 3231 3232 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3233 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3234 sppp_open_event(&ipv6cp, sp); 3235 } 3236 3237 static void 3238 sppp_ipv6cp_close(struct sppp *sp) 3239 { 3240 sppp_close_event(&ipv6cp, sp); 3241 } 3242 3243 static void 3244 sppp_ipv6cp_TO(void *cookie) 3245 { 3246 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3247 } 3248 3249 /* 3250 * Analyze a configure request. Return true if it was agreeable, and 3251 * caused action sca, false if it has been rejected or nak'ed, and 3252 * caused action scn. (The return value is used to make the state 3253 * transition decision in the state automaton.) 3254 */ 3255 static int 3256 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3257 { 3258 u_char *buf, *r, *p; 3259 struct ifnet *ifp = &sp->pp_if; 3260 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3261 struct in6_addr myaddr, desiredaddr, suggestaddr; 3262 int ifidcount; 3263 int type; 3264 int collision, nohisaddr; 3265 3266 len -= 4; 3267 origlen = len; 3268 /* 3269 * Make sure to allocate a buf that can at least hold a 3270 * conf-nak with an `address' option. We might need it below. 3271 */ 3272 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 3273 if (! buf) 3274 return (0); 3275 3276 /* pass 1: see if we can recognize them */ 3277 if (debug) 3278 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:", 3279 SPP_ARGS(ifp)); 3280 p = (void*) (h+1); 3281 ifidcount = 0; 3282 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3283 if (debug) 3284 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3285 switch (*p) { 3286 case IPV6CP_OPT_IFID: 3287 if (len >= 10 && p[1] == 10 && ifidcount == 0) { 3288 /* correctly formed address option */ 3289 ifidcount++; 3290 continue; 3291 } 3292 if (debug) 3293 addlog(" [invalid]"); 3294 break; 3295 #ifdef notyet 3296 case IPV6CP_OPT_COMPRESSION: 3297 if (len >= 4 && p[1] >= 4) { 3298 /* correctly formed compress option */ 3299 continue; 3300 } 3301 if (debug) 3302 addlog(" [invalid]"); 3303 break; 3304 #endif 3305 default: 3306 /* Others not supported. */ 3307 if (debug) 3308 addlog(" [rej]"); 3309 break; 3310 } 3311 /* Add the option to rejected list. */ 3312 bcopy (p, r, p[1]); 3313 r += p[1]; 3314 rlen += p[1]; 3315 } 3316 if (rlen) { 3317 if (debug) 3318 addlog(" send conf-rej\n"); 3319 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3320 goto end; 3321 } else if (debug) 3322 addlog("\n"); 3323 3324 /* pass 2: parse option values */ 3325 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3326 if (debug) 3327 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ", 3328 SPP_ARGS(ifp)); 3329 p = (void*) (h+1); 3330 len = origlen; 3331 type = CONF_ACK; 3332 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3333 if (debug) 3334 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3335 switch (*p) { 3336 #ifdef notyet 3337 case IPV6CP_OPT_COMPRESSION: 3338 continue; 3339 #endif 3340 case IPV6CP_OPT_IFID: 3341 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3342 bcopy(&p[2], &desiredaddr.s6_addr[8], 8); 3343 collision = (memcmp(&desiredaddr.s6_addr[8], 3344 &myaddr.s6_addr[8], 8) == 0); 3345 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3346 3347 desiredaddr.s6_addr16[0] = htons(0xfe80); 3348 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3349 3350 if (!collision && !nohisaddr) { 3351 /* no collision, hisaddr known - Conf-Ack */ 3352 type = CONF_ACK; 3353 3354 if (debug) { 3355 addlog(" %s [%s]", 3356 ip6_sprintf(&desiredaddr), 3357 sppp_cp_type_name(type)); 3358 } 3359 continue; 3360 } 3361 3362 memset(&suggestaddr, 0, sizeof(&suggestaddr)); 3363 if (collision && nohisaddr) { 3364 /* collision, hisaddr unknown - Conf-Rej */ 3365 type = CONF_REJ; 3366 memset(&p[2], 0, 8); 3367 } else { 3368 /* 3369 * - no collision, hisaddr unknown, or 3370 * - collision, hisaddr known 3371 * Conf-Nak, suggest hisaddr 3372 */ 3373 type = CONF_NAK; 3374 sppp_suggest_ip6_addr(sp, &suggestaddr); 3375 bcopy(&suggestaddr.s6_addr[8], &p[2], 8); 3376 } 3377 if (debug) 3378 addlog(" %s [%s]", ip6_sprintf(&desiredaddr), 3379 sppp_cp_type_name(type)); 3380 break; 3381 } 3382 /* Add the option to nak'ed list. */ 3383 bcopy (p, r, p[1]); 3384 r += p[1]; 3385 rlen += p[1]; 3386 } 3387 3388 if (rlen == 0 && type == CONF_ACK) { 3389 if (debug) 3390 addlog(" send %s\n", sppp_cp_type_name(type)); 3391 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1); 3392 } else { 3393 #ifdef notdef 3394 if (type == CONF_ACK) 3395 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3396 #endif 3397 3398 if (debug) { 3399 addlog(" send %s suggest %s\n", 3400 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); 3401 } 3402 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3403 } 3404 3405 end: 3406 free (buf, M_TEMP); 3407 return (rlen == 0); 3408 } 3409 3410 /* 3411 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3412 * negotiation. 3413 */ 3414 static void 3415 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3416 { 3417 u_char *buf, *p; 3418 struct ifnet *ifp = &sp->pp_if; 3419 int debug = ifp->if_flags & IFF_DEBUG; 3420 3421 len -= 4; 3422 buf = malloc (len, M_TEMP, M_NOWAIT); 3423 if (!buf) 3424 return; 3425 3426 if (debug) 3427 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:", 3428 SPP_ARGS(ifp)); 3429 3430 p = (void*) (h+1); 3431 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3432 if (debug) 3433 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3434 switch (*p) { 3435 case IPV6CP_OPT_IFID: 3436 /* 3437 * Peer doesn't grok address option. This is 3438 * bad. XXX Should we better give up here? 3439 */ 3440 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3441 break; 3442 #ifdef notyet 3443 case IPV6CP_OPT_COMPRESS: 3444 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3445 break; 3446 #endif 3447 } 3448 } 3449 if (debug) 3450 addlog("\n"); 3451 free (buf, M_TEMP); 3452 return; 3453 } 3454 3455 /* 3456 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3457 * negotiation. 3458 */ 3459 static void 3460 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3461 { 3462 u_char *buf, *p; 3463 struct ifnet *ifp = &sp->pp_if; 3464 int debug = ifp->if_flags & IFF_DEBUG; 3465 struct in6_addr suggestaddr; 3466 3467 len -= 4; 3468 buf = malloc (len, M_TEMP, M_NOWAIT); 3469 if (!buf) 3470 return; 3471 3472 if (debug) 3473 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:", 3474 SPP_ARGS(ifp)); 3475 3476 p = (void*) (h+1); 3477 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3478 if (debug) 3479 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3480 switch (*p) { 3481 case IPV6CP_OPT_IFID: 3482 /* 3483 * Peer doesn't like our local ifid. See 3484 * if we can do something for him. We'll drop 3485 * him our address then. 3486 */ 3487 if (len < 10 || p[1] != 10) 3488 break; 3489 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3490 suggestaddr.s6_addr16[0] = htons(0xfe80); 3491 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3492 bcopy(&p[2], &suggestaddr.s6_addr[8], 8); 3493 3494 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3495 if (debug) 3496 addlog(" [suggestaddr %s]", 3497 ip6_sprintf(&suggestaddr)); 3498 #ifdef IPV6CP_MYIFID_DYN 3499 /* 3500 * When doing dynamic address assignment, 3501 * we accept his offer. 3502 */ 3503 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3504 struct in6_addr lastsuggest; 3505 /* 3506 * If <suggested myaddr from peer> equals to 3507 * <hisaddr we have suggested last time>, 3508 * we have a collision. generate new random 3509 * ifid. 3510 */ 3511 sppp_suggest_ip6_addr(&lastsuggest); 3512 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3513 lastsuggest)) { 3514 if (debug) 3515 addlog(" [random]"); 3516 sppp_gen_ip6_addr(sp, &suggestaddr); 3517 } 3518 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3519 if (debug) 3520 addlog(" [agree]"); 3521 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3522 } 3523 #else 3524 /* 3525 * Since we do not do dynamic address assignment, 3526 * we ignore it and thus continue to negotiate 3527 * our already existing value. This can possibly 3528 * go into infinite request-reject loop. 3529 * 3530 * This is not likely because we normally use 3531 * ifid based on MAC-address. 3532 * If you have no ethernet card on the node, too bad. 3533 * XXX should we use fail_counter? 3534 */ 3535 #endif 3536 break; 3537 #ifdef notyet 3538 case IPV6CP_OPT_COMPRESS: 3539 /* 3540 * Peer wants different compression parameters. 3541 */ 3542 break; 3543 #endif 3544 } 3545 } 3546 if (debug) 3547 addlog("\n"); 3548 free (buf, M_TEMP); 3549 return; 3550 } 3551 3552 static void 3553 sppp_ipv6cp_tlu(struct sppp *sp) 3554 { 3555 /* we are up - notify isdn daemon */ 3556 if (sp->pp_con) 3557 sp->pp_con(sp); 3558 } 3559 3560 static void 3561 sppp_ipv6cp_tld(struct sppp *sp) 3562 { 3563 } 3564 3565 static void 3566 sppp_ipv6cp_tls(struct sppp *sp) 3567 { 3568 /* indicate to LCP that it must stay alive */ 3569 sp->lcp.protos |= (1 << IDX_IPV6CP); 3570 } 3571 3572 static void 3573 sppp_ipv6cp_tlf(struct sppp *sp) 3574 { 3575 /* we no longer need LCP */ 3576 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3577 } 3578 3579 static void 3580 sppp_ipv6cp_scr(struct sppp *sp) 3581 { 3582 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3583 struct in6_addr ouraddr; 3584 int i = 0; 3585 3586 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3587 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3588 opt[i++] = IPV6CP_OPT_IFID; 3589 opt[i++] = 10; 3590 bcopy(&ouraddr.s6_addr[8], &opt[i], 8); 3591 i += 8; 3592 } 3593 3594 #ifdef notyet 3595 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3596 opt[i++] = IPV6CP_OPT_COMPRESSION; 3597 opt[i++] = 4; 3598 opt[i++] = 0; /* TBD */ 3599 opt[i++] = 0; /* TBD */ 3600 /* variable length data may follow */ 3601 } 3602 #endif 3603 3604 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3605 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 3606 } 3607 #else /*INET6*/ 3608 static void sppp_ipv6cp_init(struct sppp *sp) 3609 { 3610 } 3611 3612 static void sppp_ipv6cp_up(struct sppp *sp) 3613 { 3614 } 3615 3616 static void sppp_ipv6cp_down(struct sppp *sp) 3617 { 3618 } 3619 3620 3621 static void sppp_ipv6cp_open(struct sppp *sp) 3622 { 3623 } 3624 3625 static void sppp_ipv6cp_close(struct sppp *sp) 3626 { 3627 } 3628 3629 static void sppp_ipv6cp_TO(void *sp) 3630 { 3631 } 3632 3633 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3634 { 3635 return 0; 3636 } 3637 3638 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3639 { 3640 } 3641 3642 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3643 { 3644 } 3645 3646 static void sppp_ipv6cp_tlu(struct sppp *sp) 3647 { 3648 } 3649 3650 static void sppp_ipv6cp_tld(struct sppp *sp) 3651 { 3652 } 3653 3654 static void sppp_ipv6cp_tls(struct sppp *sp) 3655 { 3656 } 3657 3658 static void sppp_ipv6cp_tlf(struct sppp *sp) 3659 { 3660 } 3661 3662 static void sppp_ipv6cp_scr(struct sppp *sp) 3663 { 3664 } 3665 #endif /*INET6*/ 3666 3667 3668 /* 3669 *--------------------------------------------------------------------------* 3670 * * 3671 * The CHAP implementation. * 3672 * * 3673 *--------------------------------------------------------------------------* 3674 */ 3675 3676 /* 3677 * The authentication protocols don't employ a full-fledged state machine as 3678 * the control protocols do, since they do have Open and Close events, but 3679 * not Up and Down, nor are they explicitly terminated. Also, use of the 3680 * authentication protocols may be different in both directions (this makes 3681 * sense, think of a machine that never accepts incoming calls but only 3682 * calls out, it doesn't require the called party to authenticate itself). 3683 * 3684 * Our state machine for the local authentication protocol (we are requesting 3685 * the peer to authenticate) looks like: 3686 * 3687 * RCA- 3688 * +--------------------------------------------+ 3689 * V scn,tld| 3690 * +--------+ Close +---------+ RCA+ 3691 * | |<----------------------------------| |------+ 3692 * +--->| Closed | TO* | Opened | sca | 3693 * | | |-----+ +-------| |<-----+ 3694 * | +--------+ irc | | +---------+ 3695 * | ^ | | ^ 3696 * | | | | | 3697 * | | | | | 3698 * | TO-| | | | 3699 * | |tld TO+ V | | 3700 * | | +------->+ | | 3701 * | | | | | | 3702 * | +--------+ V | | 3703 * | | |<----+<--------------------+ | 3704 * | | Req- | scr | 3705 * | | Sent | | 3706 * | | | | 3707 * | +--------+ | 3708 * | RCA- | | RCA+ | 3709 * +------+ +------------------------------------------+ 3710 * scn,tld sca,irc,ict,tlu 3711 * 3712 * 3713 * with: 3714 * 3715 * Open: LCP reached authentication phase 3716 * Close: LCP reached terminate phase 3717 * 3718 * RCA+: received reply (pap-req, chap-response), acceptable 3719 * RCN: received reply (pap-req, chap-response), not acceptable 3720 * TO+: timeout with restart counter >= 0 3721 * TO-: timeout with restart counter < 0 3722 * TO*: reschedule timeout for CHAP 3723 * 3724 * scr: send request packet (none for PAP, chap-challenge) 3725 * sca: send ack packet (pap-ack, chap-success) 3726 * scn: send nak packet (pap-nak, chap-failure) 3727 * ict: initialize re-challenge timer (CHAP only) 3728 * 3729 * tlu: this-layer-up, LCP reaches network phase 3730 * tld: this-layer-down, LCP enters terminate phase 3731 * 3732 * Note that in CHAP mode, after sending a new challenge, while the state 3733 * automaton falls back into Req-Sent state, it doesn't signal a tld 3734 * event to LCP, so LCP remains in network phase. Only after not getting 3735 * any response (or after getting an unacceptable response), CHAP closes, 3736 * causing LCP to enter terminate phase. 3737 * 3738 * With PAP, there is no initial request that can be sent. The peer is 3739 * expected to send one based on the successful negotiation of PAP as 3740 * the authentication protocol during the LCP option negotiation. 3741 * 3742 * Incoming authentication protocol requests (remote requests 3743 * authentication, we are peer) don't employ a state machine at all, 3744 * they are simply answered. Some peers [Ascend P50 firmware rev 3745 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 3746 * still in authentication phase (thereby violating the standard that 3747 * demands that these NCP packets are to be discarded), so we keep 3748 * track of the peer demanding us to authenticate, and only proceed to 3749 * phase network once we've seen a positive acknowledge for the 3750 * authentication. 3751 */ 3752 3753 /* 3754 * Handle incoming CHAP packets. 3755 */ 3756 void 3757 sppp_chap_input(struct sppp *sp, struct mbuf *m) 3758 { 3759 STDDCL; 3760 struct lcp_header *h; 3761 int len, x; 3762 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 3763 int value_len, name_len; 3764 MD5_CTX ctx; 3765 3766 len = m->m_pkthdr.len; 3767 if (len < 4) { 3768 if (debug) 3769 log(LOG_DEBUG, 3770 SPP_FMT "chap invalid packet length: %d bytes\n", 3771 SPP_ARGS(ifp), len); 3772 return; 3773 } 3774 h = mtod (m, struct lcp_header*); 3775 if (len > ntohs (h->len)) 3776 len = ntohs (h->len); 3777 3778 switch (h->type) { 3779 /* challenge, failure and success are his authproto */ 3780 case CHAP_CHALLENGE: 3781 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 3782 /* can't do anything usefull */ 3783 sp->pp_auth_failures++; 3784 printf(SPP_FMT "chap input without my name and my secret being set\n", 3785 SPP_ARGS(ifp)); 3786 break; 3787 } 3788 value = 1 + (u_char*)(h+1); 3789 value_len = value[-1]; 3790 name = value + value_len; 3791 name_len = len - value_len - 5; 3792 if (name_len < 0) { 3793 if (debug) { 3794 log(LOG_DEBUG, 3795 SPP_FMT "chap corrupted challenge " 3796 "<%s id=0x%x len=%d", 3797 SPP_ARGS(ifp), 3798 sppp_auth_type_name(PPP_CHAP, h->type), 3799 h->ident, ntohs(h->len)); 3800 if (len > 4) 3801 sppp_print_bytes((u_char*) (h+1), len-4); 3802 addlog(">\n"); 3803 } 3804 break; 3805 } 3806 3807 if (debug) { 3808 log(LOG_DEBUG, 3809 SPP_FMT "chap input <%s id=0x%x len=%d name=", 3810 SPP_ARGS(ifp), 3811 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 3812 ntohs(h->len)); 3813 sppp_print_string((char*) name, name_len); 3814 addlog(" value-size=%d value=", value_len); 3815 sppp_print_bytes(value, value_len); 3816 addlog(">\n"); 3817 } 3818 3819 /* Compute reply value. */ 3820 MD5Init(&ctx); 3821 MD5Update(&ctx, &h->ident, 1); 3822 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 3823 MD5Update(&ctx, value, value_len); 3824 MD5Final(digest, &ctx); 3825 dsize = sizeof digest; 3826 3827 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 3828 sizeof dsize, (const char *)&dsize, 3829 sizeof digest, digest, 3830 sp->myauth.name_len, 3831 sp->myauth.name, 3832 0); 3833 break; 3834 3835 case CHAP_SUCCESS: 3836 if (debug) { 3837 log(LOG_DEBUG, SPP_FMT "chap success", 3838 SPP_ARGS(ifp)); 3839 if (len > 4) { 3840 addlog(": "); 3841 sppp_print_string((char*)(h + 1), len - 4); 3842 } 3843 addlog("\n"); 3844 } 3845 x = splnet(); 3846 sp->pp_auth_failures = 0; 3847 sp->pp_flags &= ~PP_NEEDAUTH; 3848 if (sp->myauth.proto == PPP_CHAP && 3849 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 3850 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 3851 /* 3852 * We are authenticator for CHAP but didn't 3853 * complete yet. Leave it to tlu to proceed 3854 * to network phase. 3855 */ 3856 splx(x); 3857 break; 3858 } 3859 splx(x); 3860 sppp_phase_network(sp); 3861 break; 3862 3863 case CHAP_FAILURE: 3864 x = splnet(); 3865 sp->pp_auth_failures++; 3866 splx(x); 3867 if (debug) { 3868 log(LOG_INFO, SPP_FMT "chap failure", 3869 SPP_ARGS(ifp)); 3870 if (len > 4) { 3871 addlog(": "); 3872 sppp_print_string((char*)(h + 1), len - 4); 3873 } 3874 addlog("\n"); 3875 } else 3876 log(LOG_INFO, SPP_FMT "chap failure\n", 3877 SPP_ARGS(ifp)); 3878 /* await LCP shutdown by authenticator */ 3879 break; 3880 3881 /* response is my authproto */ 3882 case CHAP_RESPONSE: 3883 if (sp->hisauth.secret == NULL) { 3884 /* can't do anything usefull */ 3885 printf(SPP_FMT "chap input without his secret being set\n", 3886 SPP_ARGS(ifp)); 3887 break; 3888 } 3889 value = 1 + (u_char*)(h+1); 3890 value_len = value[-1]; 3891 name = value + value_len; 3892 name_len = len - value_len - 5; 3893 if (name_len < 0) { 3894 if (debug) { 3895 log(LOG_DEBUG, 3896 SPP_FMT "chap corrupted response " 3897 "<%s id=0x%x len=%d", 3898 SPP_ARGS(ifp), 3899 sppp_auth_type_name(PPP_CHAP, h->type), 3900 h->ident, ntohs(h->len)); 3901 if (len > 4) 3902 sppp_print_bytes((u_char*)(h+1), 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), len-4); 4238 addlog(">\n"); 4239 } 4240 break; 4241 } 4242 if (debug) { 4243 log(LOG_DEBUG, SPP_FMT "pap input(%s) " 4244 "<%s id=0x%x len=%d name=", 4245 SPP_ARGS(ifp), 4246 sppp_state_name(sp->state[IDX_PAP]), 4247 sppp_auth_type_name(PPP_PAP, h->type), 4248 h->ident, ntohs(h->len)); 4249 sppp_print_string((char*)name, name_len); 4250 addlog(" secret="); 4251 sppp_print_string((char*)secret, secret_len); 4252 addlog(">\n"); 4253 } 4254 if (name_len != sp->hisauth.name_len || 4255 secret_len != sp->hisauth.secret_len || 4256 memcmp(name, sp->hisauth.name, name_len) != 0 || 4257 memcmp(secret, sp->hisauth.secret, secret_len) != 0) { 4258 /* action scn, tld */ 4259 sp->pp_auth_failures++; 4260 mlen = sizeof(FAILMSG) - 1; 4261 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4262 sizeof mlen, (const char *)&mlen, 4263 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 4264 0); 4265 pap.tld(sp); 4266 break; 4267 } 4268 /* action sca, perhaps tlu */ 4269 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4270 sp->state[IDX_PAP] == STATE_OPENED) { 4271 mlen = sizeof(SUCCMSG) - 1; 4272 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4273 sizeof mlen, (const char *)&mlen, 4274 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 4275 0); 4276 } 4277 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4278 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4279 pap.tlu(sp); 4280 } 4281 break; 4282 4283 /* ack and nak are his authproto */ 4284 case PAP_ACK: 4285 callout_stop(&sp->pap_my_to_ch); 4286 if (debug) { 4287 log(LOG_DEBUG, SPP_FMT "pap success", 4288 SPP_ARGS(ifp)); 4289 name_len = *(char *)h; 4290 if (len > 5 && name_len) { 4291 addlog(": "); 4292 sppp_print_string((char*)(h+1), name_len); 4293 } 4294 addlog("\n"); 4295 } 4296 x = splnet(); 4297 sp->pp_auth_failures = 0; 4298 sp->pp_flags &= ~PP_NEEDAUTH; 4299 if (sp->myauth.proto == PPP_PAP && 4300 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4301 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4302 /* 4303 * We are authenticator for PAP but didn't 4304 * complete yet. Leave it to tlu to proceed 4305 * to network phase. 4306 */ 4307 splx(x); 4308 break; 4309 } 4310 splx(x); 4311 sppp_phase_network(sp); 4312 break; 4313 4314 case PAP_NAK: 4315 callout_stop(&sp->pap_my_to_ch); 4316 sp->pp_auth_failures++; 4317 if (debug) { 4318 log(LOG_INFO, SPP_FMT "pap failure", 4319 SPP_ARGS(ifp)); 4320 name_len = *(char *)h; 4321 if (len > 5 && name_len) { 4322 addlog(": "); 4323 sppp_print_string((char*)(h+1), name_len); 4324 } 4325 addlog("\n"); 4326 } else 4327 log(LOG_INFO, SPP_FMT "pap failure\n", 4328 SPP_ARGS(ifp)); 4329 /* await LCP shutdown by authenticator */ 4330 break; 4331 4332 default: 4333 /* Unknown PAP packet type -- ignore. */ 4334 if (debug) { 4335 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4336 "<0x%x id=0x%x len=%d", 4337 SPP_ARGS(ifp), 4338 h->type, h->ident, ntohs(h->len)); 4339 if (len > 4) 4340 sppp_print_bytes((u_char*)(h+1), len-4); 4341 addlog(">\n"); 4342 } 4343 break; 4344 4345 } 4346 } 4347 4348 static void 4349 sppp_pap_init(struct sppp *sp) 4350 { 4351 /* PAP doesn't have STATE_INITIAL at all. */ 4352 sp->state[IDX_PAP] = STATE_CLOSED; 4353 sp->fail_counter[IDX_PAP] = 0; 4354 sp->pp_seq[IDX_PAP] = 0; 4355 sp->pp_rseq[IDX_PAP] = 0; 4356 callout_init(&sp->ch[IDX_PAP]); 4357 callout_init(&sp->pap_my_to_ch); 4358 } 4359 4360 static void 4361 sppp_pap_open(struct sppp *sp) 4362 { 4363 if (sp->hisauth.proto == PPP_PAP && 4364 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4365 /* we are authenticator for PAP, start our timer */ 4366 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4367 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4368 } 4369 if (sp->myauth.proto == PPP_PAP) { 4370 /* we are peer, send a request, and start a timer */ 4371 pap.scr(sp); 4372 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4373 sppp_pap_my_TO, sp); 4374 } 4375 } 4376 4377 static void 4378 sppp_pap_close(struct sppp *sp) 4379 { 4380 if (sp->state[IDX_PAP] != STATE_CLOSED) 4381 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4382 } 4383 4384 /* 4385 * That's the timeout routine if we are authenticator. Since the 4386 * authenticator is basically passive in PAP, we can't do much here. 4387 */ 4388 static void 4389 sppp_pap_TO(void *cookie) 4390 { 4391 struct sppp *sp = (struct sppp *)cookie; 4392 STDDCL; 4393 int s; 4394 4395 s = splnet(); 4396 if (debug) 4397 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n", 4398 SPP_ARGS(ifp), 4399 sppp_state_name(sp->state[IDX_PAP]), 4400 sp->rst_counter[IDX_PAP]); 4401 4402 if (--sp->rst_counter[IDX_PAP] < 0) 4403 /* TO- event */ 4404 switch (sp->state[IDX_PAP]) { 4405 case STATE_REQ_SENT: 4406 pap.tld(sp); 4407 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4408 break; 4409 } 4410 else 4411 /* TO+ event, not very much we could do */ 4412 switch (sp->state[IDX_PAP]) { 4413 case STATE_REQ_SENT: 4414 /* sppp_cp_change_state() will restart the timer */ 4415 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4416 break; 4417 } 4418 4419 splx(s); 4420 } 4421 4422 /* 4423 * That's the timeout handler if we are peer. Since the peer is active, 4424 * we need to retransmit our PAP request since it is apparently lost. 4425 * XXX We should impose a max counter. 4426 */ 4427 static void 4428 sppp_pap_my_TO(void *cookie) 4429 { 4430 struct sppp *sp = (struct sppp *)cookie; 4431 STDDCL; 4432 4433 if (debug) 4434 log(LOG_DEBUG, SPP_FMT "pap peer TO\n", 4435 SPP_ARGS(ifp)); 4436 4437 pap.scr(sp); 4438 } 4439 4440 static void 4441 sppp_pap_tlu(struct sppp *sp) 4442 { 4443 STDDCL; 4444 int x; 4445 4446 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4447 4448 if (debug) 4449 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 4450 SPP_ARGS(ifp), pap.name); 4451 4452 x = splnet(); 4453 sp->pp_auth_failures = 0; 4454 /* indicate to LCP that we need to be closed down */ 4455 sp->lcp.protos |= (1 << IDX_PAP); 4456 4457 if (sp->pp_flags & PP_NEEDAUTH) { 4458 /* 4459 * Remote is authenticator, but his auth proto didn't 4460 * complete yet. Defer the transition to network 4461 * phase. 4462 */ 4463 splx(x); 4464 return; 4465 } 4466 splx(x); 4467 sppp_phase_network(sp); 4468 } 4469 4470 static void 4471 sppp_pap_tld(struct sppp *sp) 4472 { 4473 STDDCL; 4474 4475 if (debug) 4476 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp)); 4477 callout_stop(&sp->ch[IDX_PAP]); 4478 callout_stop(&sp->pap_my_to_ch); 4479 sp->lcp.protos &= ~(1 << IDX_PAP); 4480 4481 lcp.Close(sp); 4482 } 4483 4484 static void 4485 sppp_pap_scr(struct sppp *sp) 4486 { 4487 u_char idlen, pwdlen; 4488 4489 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4490 /* can't do anything usefull */ 4491 printf(SPP_FMT "pap starting without my name and secret being set\n", 4492 SPP_ARGS(&sp->pp_if)); 4493 return; 4494 } 4495 4496 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4497 pwdlen = sp->myauth.secret_len; 4498 idlen = sp->myauth.name_len; 4499 4500 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4501 sizeof idlen, (const char *)&idlen, 4502 idlen, sp->myauth.name, 4503 sizeof pwdlen, (const char *)&pwdlen, 4504 pwdlen, sp->myauth.secret, 4505 0); 4506 } 4507 4508 /* 4509 * Random miscellaneous functions. 4510 */ 4511 4512 /* 4513 * Send a PAP or CHAP proto packet. 4514 * 4515 * Varadic function, each of the elements for the ellipsis is of type 4516 * ``size_t mlen, const u_char *msg''. Processing will stop iff 4517 * mlen == 0. 4518 * NOTE: never declare variadic functions with types subject to type 4519 * promotion (i.e. u_char). This is asking for big trouble depending 4520 * on the architecture you are on... 4521 */ 4522 4523 static void 4524 sppp_auth_send(const struct cp *cp, struct sppp *sp, 4525 unsigned int type, unsigned int id, 4526 ...) 4527 { 4528 STDDCL; 4529 struct lcp_header *lh; 4530 struct mbuf *m; 4531 u_char *p; 4532 int len; 4533 size_t pkthdrlen; 4534 unsigned int mlen; 4535 const char *msg; 4536 va_list ap; 4537 4538 MGETHDR (m, M_DONTWAIT, MT_DATA); 4539 if (! m) 4540 return; 4541 m->m_pkthdr.rcvif = 0; 4542 4543 if (sp->pp_flags & PP_NOFRAMING) { 4544 *mtod(m, u_int16_t*) = htons(cp->proto); 4545 pkthdrlen = 2; 4546 lh = (struct lcp_header*)(mtod(m, u_int8_t*)+2); 4547 } else { 4548 struct ppp_header *h; 4549 h = mtod (m, struct ppp_header*); 4550 h->address = PPP_ALLSTATIONS; /* broadcast address */ 4551 h->control = PPP_UI; /* Unnumbered Info */ 4552 h->protocol = htons(cp->proto); 4553 pkthdrlen = PPP_HEADER_LEN; 4554 4555 lh = (struct lcp_header*)(h + 1); 4556 } 4557 4558 lh->type = type; 4559 lh->ident = id; 4560 p = (u_char*) (lh+1); 4561 4562 va_start(ap, id); 4563 len = 0; 4564 4565 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 4566 msg = va_arg(ap, const char *); 4567 len += mlen; 4568 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 4569 va_end(ap); 4570 m_freem(m); 4571 return; 4572 } 4573 4574 bcopy(msg, p, mlen); 4575 p += mlen; 4576 } 4577 va_end(ap); 4578 4579 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 4580 lh->len = htons (LCP_HEADER_LEN + len); 4581 4582 if (debug) { 4583 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 4584 SPP_ARGS(ifp), cp->name, 4585 sppp_auth_type_name(cp->proto, lh->type), 4586 lh->ident, ntohs(lh->len)); 4587 if (len) 4588 sppp_print_bytes((u_char*) (lh+1), len); 4589 addlog(">\n"); 4590 } 4591 if (IF_QFULL (&sp->pp_cpq)) { 4592 IF_DROP (&sp->pp_fastq); 4593 IF_DROP (&ifp->if_snd); 4594 m_freem (m); 4595 ++ifp->if_oerrors; 4596 return; 4597 } else 4598 IF_ENQUEUE (&sp->pp_cpq, m); 4599 if (! (ifp->if_flags & IFF_OACTIVE)) 4600 (*ifp->if_start) (ifp); 4601 ifp->if_obytes += m->m_pkthdr.len + 3; 4602 } 4603 4604 /* 4605 * Send keepalive packets, every 10 seconds. 4606 */ 4607 static void 4608 sppp_keepalive(void *dummy) 4609 { 4610 struct sppp *sp; 4611 int s; 4612 time_t now; 4613 4614 s = splnet(); 4615 now = mono_time.tv_sec; 4616 for (sp=spppq; sp; sp=sp->pp_next) { 4617 struct ifnet *ifp = &sp->pp_if; 4618 4619 /* check idle timeout */ 4620 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 4621 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 4622 /* idle timeout is enabled for this interface */ 4623 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 4624 if (ifp->if_flags & IFF_DEBUG) 4625 printf("%s: no activitiy for %lu seconds\n", 4626 sp->pp_if.if_xname, 4627 (unsigned long)(now-sp->pp_last_activity)); 4628 lcp.Close(sp); 4629 continue; 4630 } 4631 } 4632 4633 /* Keepalive mode disabled or channel down? */ 4634 if (! (sp->pp_flags & PP_KEEPALIVE) || 4635 ! (ifp->if_flags & IFF_RUNNING)) 4636 continue; 4637 4638 /* No keepalive in PPP mode if LCP not opened yet. */ 4639 if (! (sp->pp_flags & PP_CISCO) && 4640 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) 4641 continue; 4642 4643 /* No echo reply, but maybe user data passed through? */ 4644 if ((now - sp->pp_last_activity) < LCP_KEEPALIVE_INTERVAL) { 4645 sp->pp_alivecnt = 0; 4646 continue; 4647 } 4648 4649 if (sp->pp_alivecnt == MAXALIVECNT) { 4650 /* No keepalive packets got. Stop the interface. */ 4651 if_down (ifp); 4652 IF_PURGE (&sp->pp_cpq); 4653 if (! (sp->pp_flags & PP_CISCO)) { 4654 printf("%s: LCP keepalive timed out, going to restart the connection\n", 4655 ifp->if_xname); 4656 sp->pp_alivecnt = 0; 4657 4658 /* we are down, close all open protocols */ 4659 lcp.Close(sp); 4660 4661 /* And now prepare LCP to reestablish the link, if configured to do so. */ 4662 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 4663 4664 /* Close connection imediatly, completition of this 4665 * will summon the magic needed to reestablish it. */ 4666 sp->pp_tlf(sp); 4667 continue; 4668 } 4669 } 4670 if (sp->pp_alivecnt <= MAXALIVECNT) 4671 ++sp->pp_alivecnt; 4672 if (sp->pp_flags & PP_CISCO) 4673 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ, 4674 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 4675 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 4676 int32_t nmagic = htonl (sp->lcp.magic); 4677 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 4678 sppp_cp_send (sp, PPP_LCP, ECHO_REQ, 4679 sp->lcp.echoid, 4, &nmagic); 4680 } 4681 } 4682 splx(s); 4683 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 4684 } 4685 4686 /* 4687 * Get both IP addresses. 4688 */ 4689 static void 4690 sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, u_int32_t *srcmask) 4691 { 4692 struct ifnet *ifp = &sp->pp_if; 4693 struct ifaddr *ifa; 4694 struct sockaddr_in *si, *sm; 4695 u_int32_t ssrc, ddst; 4696 4697 sm = NULL; 4698 ssrc = ddst = 0; 4699 /* 4700 * Pick the first AF_INET address from the list, 4701 * aliases don't make any sense on a p2p link anyway. 4702 */ 4703 si = 0; 4704 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 4705 if (ifa->ifa_addr->sa_family == AF_INET) { 4706 si = (struct sockaddr_in *)ifa->ifa_addr; 4707 sm = (struct sockaddr_in *)ifa->ifa_netmask; 4708 if (si) 4709 break; 4710 } 4711 } 4712 if (ifa) { 4713 if (si && si->sin_addr.s_addr) { 4714 ssrc = si->sin_addr.s_addr; 4715 if (srcmask) 4716 *srcmask = ntohl(sm->sin_addr.s_addr); 4717 } 4718 4719 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 4720 if (si && si->sin_addr.s_addr) 4721 ddst = si->sin_addr.s_addr; 4722 } 4723 4724 if (dst) *dst = ntohl(ddst); 4725 if (src) *src = ntohl(ssrc); 4726 } 4727 4728 /* 4729 * Set IP addresses. Must be called at splnet. 4730 * If an address is 0, leave it the way it is. 4731 */ 4732 static void 4733 sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr) 4734 { 4735 STDDCL; 4736 struct ifaddr *ifa; 4737 struct sockaddr_in *si; 4738 struct sockaddr_in *dest; 4739 4740 /* 4741 * Pick the first AF_INET address from the list, 4742 * aliases don't make any sense on a p2p link anyway. 4743 */ 4744 4745 si = 0; 4746 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4747 { 4748 if (ifa->ifa_addr->sa_family == AF_INET) 4749 { 4750 si = (struct sockaddr_in *)ifa->ifa_addr; 4751 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4752 if (si) 4753 break; 4754 } 4755 } 4756 4757 if (ifa && si) 4758 { 4759 int error; 4760 struct sockaddr_in new_sin = *si; 4761 struct sockaddr_in new_dst = *dest; 4762 4763 /* 4764 * Scrub old routes now instead of calling in_ifinit with 4765 * scrub=1, because we may change the dstaddr 4766 * before the call to in_ifinit. 4767 */ 4768 in_ifscrub(ifp, ifatoia(ifa)); 4769 4770 if (myaddr != 0) 4771 new_sin.sin_addr.s_addr = htonl(myaddr); 4772 if (hisaddr != 0) { 4773 new_dst.sin_addr.s_addr = htonl(hisaddr); 4774 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) { 4775 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 4776 *dest = new_dst; /* fix dstaddr in place */ 4777 } 4778 } 4779 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4780 if(debug && error) 4781 { 4782 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addrs: in_ifinit " 4783 " failed, error=%d\n", SPP_ARGS(ifp), error); 4784 } 4785 } 4786 } 4787 4788 /* 4789 * Clear IP addresses. Must be called at splnet. 4790 */ 4791 static void 4792 sppp_clear_ip_addrs(struct sppp *sp) 4793 { 4794 struct ifnet *ifp = &sp->pp_if; 4795 struct ifaddr *ifa; 4796 struct sockaddr_in *si; 4797 struct sockaddr_in *dest; 4798 4799 u_int32_t remote; 4800 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4801 remote = sp->ipcp.saved_hisaddr; 4802 else 4803 sppp_get_ip_addrs(sp, 0, &remote, 0); 4804 4805 /* 4806 * Pick the first AF_INET address from the list, 4807 * aliases don't make any sense on a p2p link anyway. 4808 */ 4809 4810 si = 0; 4811 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4812 { 4813 if (ifa->ifa_addr->sa_family == AF_INET) 4814 { 4815 si = (struct sockaddr_in *)ifa->ifa_addr; 4816 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4817 if (si) 4818 break; 4819 } 4820 } 4821 4822 if (ifa && si) 4823 { 4824 struct sockaddr_in new_sin = *si; 4825 4826 in_ifscrub(ifp, ifatoia(ifa)); 4827 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 4828 new_sin.sin_addr.s_addr = 0; 4829 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4830 /* replace peer addr in place */ 4831 dest->sin_addr.s_addr = sp->ipcp.saved_hisaddr; 4832 in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4833 } 4834 } 4835 4836 #ifdef INET6 4837 /* 4838 * Get both IPv6 addresses. 4839 */ 4840 static void 4841 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 4842 struct in6_addr *srcmask) 4843 { 4844 struct ifnet *ifp = &sp->pp_if; 4845 struct ifaddr *ifa; 4846 struct sockaddr_in6 *si, *sm; 4847 struct in6_addr ssrc, ddst; 4848 4849 sm = NULL; 4850 memset(&ssrc, 0, sizeof(ssrc)); 4851 memset(&ddst, 0, sizeof(ddst)); 4852 /* 4853 * Pick the first link-local AF_INET6 address from the list, 4854 * aliases don't make any sense on a p2p link anyway. 4855 */ 4856 si = 0; 4857 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4858 if (ifa->ifa_addr->sa_family == AF_INET6) { 4859 si = (struct sockaddr_in6 *)ifa->ifa_addr; 4860 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 4861 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 4862 break; 4863 } 4864 if (ifa) { 4865 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 4866 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc)); 4867 if (srcmask) { 4868 bcopy(&sm->sin6_addr, srcmask, 4869 sizeof(*srcmask)); 4870 } 4871 } 4872 4873 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 4874 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 4875 bcopy(&si->sin6_addr, &ddst, sizeof(ddst)); 4876 } 4877 4878 if (dst) 4879 bcopy(&ddst, dst, sizeof(*dst)); 4880 if (src) 4881 bcopy(&ssrc, src, sizeof(*src)); 4882 } 4883 4884 #ifdef IPV6CP_MYIFID_DYN 4885 /* 4886 * Generate random ifid. 4887 */ 4888 static void 4889 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 4890 { 4891 /* TBD */ 4892 } 4893 4894 /* 4895 * Set my IPv6 address. Must be called at splnet. 4896 */ 4897 static void 4898 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 4899 { 4900 STDDCL; 4901 struct ifaddr *ifa; 4902 struct sockaddr_in6 *sin6; 4903 4904 /* 4905 * Pick the first link-local AF_INET6 address from the list, 4906 * aliases don't make any sense on a p2p link anyway. 4907 */ 4908 4909 sin6 = NULL; 4910 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4911 { 4912 if (ifa->ifa_addr->sa_family == AF_INET6) 4913 { 4914 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 4915 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 4916 break; 4917 } 4918 } 4919 4920 if (ifa && sin6) 4921 { 4922 int error; 4923 struct sockaddr_in6 new_sin6 = *sin6; 4924 4925 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr)); 4926 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 4927 if (debug && error) 4928 { 4929 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit " 4930 " failed, error=%d\n", SPP_ARGS(ifp), error); 4931 } 4932 } 4933 } 4934 #endif 4935 4936 /* 4937 * Suggest a candidate address to be used by peer. 4938 */ 4939 static void 4940 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 4941 { 4942 struct in6_addr myaddr; 4943 struct timeval tv; 4944 4945 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4946 4947 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 4948 microtime(&tv); 4949 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 4950 myaddr.s6_addr[14] ^= 0xff; 4951 myaddr.s6_addr[15] ^= 0xff; 4952 } else { 4953 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 4954 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 4955 } 4956 if (suggest) 4957 bcopy(&myaddr, suggest, sizeof(myaddr)); 4958 } 4959 #endif /*INET6*/ 4960 4961 /* 4962 * Process ioctl requests specific to the PPP interface. 4963 * Permissions have already been checked. 4964 */ 4965 static int 4966 sppp_params(struct sppp *sp, int cmd, void *data) 4967 { 4968 switch (cmd) { 4969 case SPPPGETAUTHCFG: 4970 { 4971 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 4972 int error; 4973 size_t len; 4974 4975 cfg->myauthflags = sp->myauth.flags; 4976 cfg->hisauthflags = sp->hisauth.flags; 4977 strncpy(cfg->ifname, sp->pp_if.if_xname, IFNAMSIZ); 4978 cfg->hisauth = 0; 4979 if (sp->hisauth.proto) 4980 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4981 cfg->myauth = 0; 4982 if (sp->myauth.proto) 4983 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4984 if (cfg->myname_length == 0) { 4985 if (sp->myauth.name != NULL) 4986 cfg->myname_length = sp->myauth.name_len + 1; 4987 } else { 4988 if (sp->myauth.name == NULL) { 4989 cfg->myname_length = 0; 4990 } else { 4991 len = sp->myauth.name_len + 1; 4992 if (cfg->myname_length < len) 4993 return (ENAMETOOLONG); 4994 error = copyout(sp->myauth.name, cfg->myname, len); 4995 if (error) return error; 4996 } 4997 } 4998 if (cfg->hisname_length == 0) { 4999 if(sp->hisauth.name != NULL) 5000 cfg->hisname_length = sp->hisauth.name_len + 1; 5001 } else { 5002 if (sp->hisauth.name == NULL) { 5003 cfg->hisname_length = 0; 5004 } else { 5005 len = sp->hisauth.name_len + 1; 5006 if (cfg->hisname_length < len) 5007 return (ENAMETOOLONG); 5008 error = copyout(sp->hisauth.name, cfg->hisname, len); 5009 if (error) return error; 5010 } 5011 } 5012 } 5013 break; 5014 case SPPPSETAUTHCFG: 5015 { 5016 struct spppauthcfg *cfg = (struct spppauthcfg*)data; 5017 int error; 5018 5019 if (sp->myauth.name) { 5020 free(sp->myauth.name, M_DEVBUF); 5021 sp->myauth.name = NULL; 5022 } 5023 if (sp->myauth.secret) { 5024 free(sp->myauth.secret, M_DEVBUF); 5025 sp->myauth.secret = NULL; 5026 } 5027 if (sp->hisauth.name) { 5028 free(sp->hisauth.name, M_DEVBUF); 5029 sp->hisauth.name = NULL; 5030 } 5031 if (sp->hisauth.secret) { 5032 free(sp->hisauth.secret, M_DEVBUF); 5033 sp->hisauth.secret = NULL; 5034 } 5035 5036 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5037 if (cfg->hisname_length >= MCLBYTES) 5038 return (ENAMETOOLONG); 5039 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5040 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5041 if (error) { 5042 free(sp->hisauth.name, M_DEVBUF); 5043 sp->hisauth.name = NULL; 5044 return error; 5045 } 5046 sp->hisauth.name_len = cfg->hisname_length - 1; 5047 sp->hisauth.name[sp->hisauth.name_len] = 0; 5048 } 5049 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5050 if (cfg->hissecret_length >= MCLBYTES) 5051 return (ENAMETOOLONG); 5052 sp->hisauth.secret = malloc(cfg->hissecret_length, M_DEVBUF, M_WAITOK); 5053 error = copyin(cfg->hissecret, sp->hisauth.secret, cfg->hissecret_length); 5054 if (error) { 5055 free(sp->hisauth.secret, M_DEVBUF); 5056 sp->hisauth.secret = NULL; 5057 return error; 5058 } 5059 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5060 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5061 } 5062 if (cfg->myname != NULL && cfg->myname_length > 0) { 5063 if (cfg->myname_length >= MCLBYTES) 5064 return (ENAMETOOLONG); 5065 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5066 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5067 if (error) { 5068 free(sp->myauth.name, M_DEVBUF); 5069 sp->myauth.name = NULL; 5070 return error; 5071 } 5072 sp->myauth.name_len = cfg->myname_length - 1; 5073 sp->myauth.name[sp->myauth.name_len] = 0; 5074 } 5075 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5076 if (cfg->mysecret_length >= MCLBYTES) 5077 return (ENAMETOOLONG); 5078 sp->myauth.secret = malloc(cfg->mysecret_length, M_DEVBUF, M_WAITOK); 5079 error = copyin(cfg->mysecret, sp->myauth.secret, cfg->mysecret_length); 5080 if (error) { 5081 free(sp->myauth.secret, M_DEVBUF); 5082 sp->myauth.secret = NULL; 5083 return error; 5084 } 5085 sp->myauth.secret_len = cfg->mysecret_length - 1; 5086 sp->myauth.secret[sp->myauth.secret_len] = 0; 5087 } 5088 sp->myauth.flags = cfg->myauthflags; 5089 if (cfg->myauth) 5090 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5091 sp->hisauth.flags = cfg->hisauthflags; 5092 if (cfg->hisauth) 5093 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5094 sp->pp_auth_failures = 0; 5095 if (sp->hisauth.proto != 0) 5096 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 5097 else 5098 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 5099 } 5100 break; 5101 case SPPPGETLCPCFG: 5102 { 5103 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5104 lcp->lcp_timeout = sp->lcp.timeout; 5105 } 5106 break; 5107 case SPPPSETLCPCFG: 5108 { 5109 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5110 sp->lcp.timeout = lcp->lcp_timeout; 5111 } 5112 break; 5113 case SPPPGETSTATUS: 5114 { 5115 struct spppstatus *status = (struct spppstatus *)data; 5116 status->phase = sp->pp_phase; 5117 } 5118 break; 5119 case SPPPGETIDLETO: 5120 { 5121 struct spppidletimeout *to = (struct spppidletimeout *)data; 5122 to->idle_seconds = sp->pp_idle_timeout; 5123 } 5124 break; 5125 case SPPPSETIDLETO: 5126 { 5127 struct spppidletimeout *to = (struct spppidletimeout *)data; 5128 sp->pp_idle_timeout = to->idle_seconds; 5129 } 5130 break; 5131 case SPPPSETAUTHFAILURE: 5132 { 5133 struct spppauthfailuresettings *afsettings = (struct spppauthfailuresettings *)data; 5134 sp->pp_max_auth_fail = afsettings->max_failures; 5135 sp->pp_auth_failures = 0; 5136 } 5137 break; 5138 case SPPPGETAUTHFAILURES: 5139 { 5140 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5141 stats->auth_failures = sp->pp_auth_failures; 5142 stats->max_failures = sp->pp_max_auth_fail; 5143 } 5144 break; 5145 case SPPPSETDNSOPTS: 5146 { 5147 struct spppdnssettings *req = (struct spppdnssettings*)data; 5148 sp->query_dns = req->query_dns & 3; 5149 } 5150 break; 5151 case SPPPGETDNSOPTS: 5152 { 5153 struct spppdnssettings *req = (struct spppdnssettings*)data; 5154 req->query_dns = sp->query_dns; 5155 } 5156 break; 5157 case SPPPGETDNSADDRS: 5158 { 5159 struct spppdnsaddrs *addrs = (struct spppdnsaddrs*)data; 5160 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5161 } 5162 break; 5163 default: 5164 return (EINVAL); 5165 } 5166 5167 return (0); 5168 } 5169 5170 static void 5171 sppp_phase_network(struct sppp *sp) 5172 { 5173 STDDCL; 5174 int i; 5175 u_int32_t mask; 5176 5177 sp->pp_phase = SPPP_PHASE_NETWORK; 5178 5179 if(debug) 5180 { 5181 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 5182 sppp_phase_name(sp->pp_phase)); 5183 } 5184 5185 /* Notify NCPs now. */ 5186 for (i = 0; i < IDX_COUNT; i++) 5187 if ((cps[i])->flags & CP_NCP) 5188 (cps[i])->Open(sp); 5189 5190 /* Send Up events to all NCPs. */ 5191 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5192 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) 5193 (cps[i])->Up(sp); 5194 5195 /* if no NCP is starting, all this was in vain, close down */ 5196 sppp_lcp_check_and_close(sp); 5197 } 5198 5199 5200 static const char * 5201 sppp_cp_type_name(u_char type) 5202 { 5203 static char buf[12]; 5204 switch (type) { 5205 case CONF_REQ: return "conf-req"; 5206 case CONF_ACK: return "conf-ack"; 5207 case CONF_NAK: return "conf-nak"; 5208 case CONF_REJ: return "conf-rej"; 5209 case TERM_REQ: return "term-req"; 5210 case TERM_ACK: return "term-ack"; 5211 case CODE_REJ: return "code-rej"; 5212 case PROTO_REJ: return "proto-rej"; 5213 case ECHO_REQ: return "echo-req"; 5214 case ECHO_REPLY: return "echo-reply"; 5215 case DISC_REQ: return "discard-req"; 5216 } 5217 sprintf (buf, "0x%x", type); 5218 return buf; 5219 } 5220 5221 static const char * 5222 sppp_auth_type_name(u_short proto, u_char type) 5223 { 5224 static char buf[12]; 5225 switch (proto) { 5226 case PPP_CHAP: 5227 switch (type) { 5228 case CHAP_CHALLENGE: return "challenge"; 5229 case CHAP_RESPONSE: return "response"; 5230 case CHAP_SUCCESS: return "success"; 5231 case CHAP_FAILURE: return "failure"; 5232 } 5233 case PPP_PAP: 5234 switch (type) { 5235 case PAP_REQ: return "req"; 5236 case PAP_ACK: return "ack"; 5237 case PAP_NAK: return "nak"; 5238 } 5239 } 5240 sprintf (buf, "0x%x", type); 5241 return buf; 5242 } 5243 5244 static const char * 5245 sppp_lcp_opt_name(u_char opt) 5246 { 5247 static char buf[12]; 5248 switch (opt) { 5249 case LCP_OPT_MRU: return "mru"; 5250 case LCP_OPT_ASYNC_MAP: return "async-map"; 5251 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 5252 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 5253 case LCP_OPT_MAGIC: return "magic"; 5254 case LCP_OPT_PROTO_COMP: return "proto-comp"; 5255 case LCP_OPT_ADDR_COMP: return "addr-comp"; 5256 } 5257 sprintf (buf, "0x%x", opt); 5258 return buf; 5259 } 5260 5261 static const char * 5262 sppp_ipcp_opt_name(u_char opt) 5263 { 5264 static char buf[12]; 5265 switch (opt) { 5266 case IPCP_OPT_ADDRESSES: return "addresses"; 5267 case IPCP_OPT_COMPRESSION: return "compression"; 5268 case IPCP_OPT_ADDRESS: return "address"; 5269 } 5270 sprintf (buf, "0x%x", opt); 5271 return buf; 5272 } 5273 5274 #ifdef INET6 5275 static const char * 5276 sppp_ipv6cp_opt_name(u_char opt) 5277 { 5278 static char buf[12]; 5279 switch (opt) { 5280 case IPV6CP_OPT_IFID: return "ifid"; 5281 case IPV6CP_OPT_COMPRESSION: return "compression"; 5282 } 5283 sprintf (buf, "0x%x", opt); 5284 return buf; 5285 } 5286 #endif 5287 5288 static const char * 5289 sppp_state_name(int state) 5290 { 5291 switch (state) { 5292 case STATE_INITIAL: return "initial"; 5293 case STATE_STARTING: return "starting"; 5294 case STATE_CLOSED: return "closed"; 5295 case STATE_STOPPED: return "stopped"; 5296 case STATE_CLOSING: return "closing"; 5297 case STATE_STOPPING: return "stopping"; 5298 case STATE_REQ_SENT: return "req-sent"; 5299 case STATE_ACK_RCVD: return "ack-rcvd"; 5300 case STATE_ACK_SENT: return "ack-sent"; 5301 case STATE_OPENED: return "opened"; 5302 } 5303 return "illegal"; 5304 } 5305 5306 static const char * 5307 sppp_phase_name(int phase) 5308 { 5309 switch (phase) { 5310 case SPPP_PHASE_DEAD: return "dead"; 5311 case SPPP_PHASE_ESTABLISH: return "establish"; 5312 case SPPP_PHASE_TERMINATE: return "terminate"; 5313 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 5314 case SPPP_PHASE_NETWORK: return "network"; 5315 } 5316 return "illegal"; 5317 } 5318 5319 static const char * 5320 sppp_proto_name(u_short proto) 5321 { 5322 static char buf[12]; 5323 switch (proto) { 5324 case PPP_LCP: return "lcp"; 5325 case PPP_IPCP: return "ipcp"; 5326 case PPP_PAP: return "pap"; 5327 case PPP_CHAP: return "chap"; 5328 case PPP_IPV6CP: return "ipv6cp"; 5329 } 5330 sprintf(buf, "0x%x", (unsigned)proto); 5331 return buf; 5332 } 5333 5334 static void 5335 sppp_print_bytes(const u_char *p, u_short len) 5336 { 5337 addlog(" %02x", *p++); 5338 while (--len > 0) 5339 addlog("-%02x", *p++); 5340 } 5341 5342 static void 5343 sppp_print_string(const char *p, u_short len) 5344 { 5345 u_char c; 5346 5347 while (len-- > 0) { 5348 c = *p++; 5349 /* 5350 * Print only ASCII chars directly. RFC 1994 recommends 5351 * using only them, but we don't rely on it. */ 5352 if (c < ' ' || c > '~') 5353 addlog("\\x%x", c); 5354 else 5355 addlog("%c", c); 5356 } 5357 } 5358 5359 static const char * 5360 sppp_dotted_quad(u_int32_t addr) 5361 { 5362 static char s[16]; 5363 sprintf(s, "%d.%d.%d.%d", 5364 (int)((addr >> 24) & 0xff), 5365 (int)((addr >> 16) & 0xff), 5366 (int)((addr >> 8) & 0xff), 5367 (int)(addr & 0xff)); 5368 return s; 5369 } 5370 5371 /* a dummy, used to drop uninteresting events */ 5372 static void 5373 sppp_null(struct sppp *unused) 5374 { 5375 /* do just nothing */ 5376 } 5377 /* 5378 * This file is large. Tell emacs to highlight it nevertheless. 5379 * 5380 * Local Variables: 5381 * hilit-auto-highlight-maxout: 120000 5382 * End: 5383 */ 5384
Indexes created Fri Sep 26 08:10:20 GMT 2025