if_spppsubr.c revision 1.52
1 /* $NetBSD: if_spppsubr.c,v 1.52 2002/07/27 19:09:07 christos 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 1.52 2002/07/27 19:09:07 christos Exp $"); 32 33 #include "opt_inet.h" 34 #include "opt_ipx.h" 35 #include "opt_iso.h" 36 #include "opt_ns.h" 37 38 #include <sys/param.h> 39 #include <sys/proc.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/sockio.h> 43 #include <sys/socket.h> 44 #include <sys/syslog.h> 45 #include <sys/malloc.h> 46 #include <sys/mbuf.h> 47 #include <sys/callout.h> 48 #include <sys/md5.h> 49 50 #include <net/if.h> 51 #include <net/netisr.h> 52 #include <net/if_types.h> 53 #include <net/route.h> 54 #include <net/ppp_defs.h> 55 56 #include <machine/stdarg.h> 57 58 #include <netinet/in.h> 59 #include <netinet/in_systm.h> 60 #include <netinet/in_var.h> 61 #ifdef INET 62 #include <netinet/ip.h> 63 #include <netinet/tcp.h> 64 #endif 65 #include <net/ethertypes.h> 66 67 #ifdef IPX 68 #include <netipx/ipx.h> 69 #include <netipx/ipx_if.h> 70 #endif 71 72 #ifdef NS 73 #include <netns/ns.h> 74 #include <netns/ns_if.h> 75 #endif 76 77 #ifdef ISO 78 #include <netiso/argo_debug.h> 79 #include <netiso/iso.h> 80 #include <netiso/iso_var.h> 81 #include <netiso/iso_snpac.h> 82 #endif 83 84 #include <net/if_sppp.h> 85 #include <net/if_spppvar.h> 86 87 #define MAXALIVECNT 3 /* max. alive packets */ 88 #define DEFAULT_MAX_AUTH_FAILURES 5 /* max. auth. failures */ 89 90 /* 91 * Interface flags that can be set in an ifconfig command. 92 * 93 * Setting link0 will make the link passive, i.e. it will be marked 94 * as being administrative openable, but won't be opened to begin 95 * with. Incoming calls will be answered, or subsequent calls with 96 * -link1 will cause the administrative open of the LCP layer. 97 * 98 * Setting link1 will cause the link to auto-dial only as packets 99 * arrive to be sent. 100 * 101 * Setting IFF_DEBUG will syslog the option negotiation and state 102 * transitions at level kern.debug. Note: all logs consistently look 103 * like 104 * 105 * <if-name><unit>: <proto-name> <additional info...> 106 * 107 * with <if-name><unit> being something like "bppp0", and <proto-name> 108 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. 109 */ 110 111 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 112 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 113 114 #define CONF_REQ 1 /* PPP configure request */ 115 #define CONF_ACK 2 /* PPP configure acknowledge */ 116 #define CONF_NAK 3 /* PPP configure negative ack */ 117 #define CONF_REJ 4 /* PPP configure reject */ 118 #define TERM_REQ 5 /* PPP terminate request */ 119 #define TERM_ACK 6 /* PPP terminate acknowledge */ 120 #define CODE_REJ 7 /* PPP code reject */ 121 #define PROTO_REJ 8 /* PPP protocol reject */ 122 #define ECHO_REQ 9 /* PPP echo request */ 123 #define ECHO_REPLY 10 /* PPP echo reply */ 124 #define DISC_REQ 11 /* PPP discard request */ 125 126 #define LCP_OPT_MRU 1 /* maximum receive unit */ 127 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 128 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 129 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 130 #define LCP_OPT_MAGIC 5 /* magic number */ 131 #define LCP_OPT_RESERVED 6 /* reserved */ 132 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 133 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 134 135 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 136 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol */ 137 #define IPCP_OPT_ADDRESS 3 /* local IP address */ 138 #define IPCP_OPT_PRIMDNS 129 /* primary remote dns address */ 139 #define IPCP_OPT_SECDNS 131 /* secondary remote dns address */ 140 141 #define IPV6CP_OPT_IFID 1 /* interface identifier */ 142 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 143 144 #define PAP_REQ 1 /* PAP name/password request */ 145 #define PAP_ACK 2 /* PAP acknowledge */ 146 #define PAP_NAK 3 /* PAP fail */ 147 148 #define CHAP_CHALLENGE 1 /* CHAP challenge request */ 149 #define CHAP_RESPONSE 2 /* CHAP challenge response */ 150 #define CHAP_SUCCESS 3 /* CHAP response ok */ 151 #define CHAP_FAILURE 4 /* CHAP response failed */ 152 153 #define CHAP_MD5 5 /* hash algorithm - MD5 */ 154 155 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 156 #define CISCO_UNICAST 0x0f /* Cisco unicast address */ 157 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 158 #define CISCO_ADDR_REQ 0 /* Cisco address request */ 159 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 160 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 161 162 /* states are named and numbered according to RFC 1661 */ 163 #define STATE_INITIAL 0 164 #define STATE_STARTING 1 165 #define STATE_CLOSED 2 166 #define STATE_STOPPED 3 167 #define STATE_CLOSING 4 168 #define STATE_STOPPING 5 169 #define STATE_REQ_SENT 6 170 #define STATE_ACK_RCVD 7 171 #define STATE_ACK_SENT 8 172 #define STATE_OPENED 9 173 174 struct ppp_header { 175 u_char address; 176 u_char control; 177 u_short protocol; 178 } __attribute__((__packed__)); 179 #define PPP_HEADER_LEN sizeof (struct ppp_header) 180 181 struct lcp_header { 182 u_char type; 183 u_char ident; 184 u_short len; 185 } __attribute__((__packed__)); 186 #define LCP_HEADER_LEN sizeof (struct lcp_header) 187 188 struct cisco_packet { 189 u_int32_t type; 190 u_int32_t par1; 191 u_int32_t par2; 192 u_short rel; 193 u_short time0; 194 u_short time1; 195 } __attribute__((__packed__)); 196 #define CISCO_PACKET_LEN 18 197 198 /* 199 * We follow the spelling and capitalization of RFC 1661 here, to make 200 * it easier comparing with the standard. Please refer to this RFC in 201 * case you can't make sense out of these abbreviation; it will also 202 * explain the semantics related to the various events and actions. 203 */ 204 struct cp { 205 u_short proto; /* PPP control protocol number */ 206 u_char protoidx; /* index into state table in struct sppp */ 207 u_char flags; 208 #define CP_LCP 0x01 /* this is the LCP */ 209 #define CP_AUTH 0x02 /* this is an authentication protocol */ 210 #define CP_NCP 0x04 /* this is a NCP */ 211 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 212 const char *name; /* name of this control protocol */ 213 /* event handlers */ 214 void (*Up)(struct sppp *sp); 215 void (*Down)(struct sppp *sp); 216 void (*Open)(struct sppp *sp); 217 void (*Close)(struct sppp *sp); 218 void (*TO)(void *sp); 219 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len); 220 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len); 221 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len); 222 /* actions */ 223 void (*tlu)(struct sppp *sp); 224 void (*tld)(struct sppp *sp); 225 void (*tls)(struct sppp *sp); 226 void (*tlf)(struct sppp *sp); 227 void (*scr)(struct sppp *sp); 228 }; 229 230 static struct sppp *spppq; 231 static struct callout keepalive_ch; 232 233 #ifdef __FreeBSD__ 234 #define SPP_FMT "%s%d: " 235 #define SPP_ARGS(ifp) (ifp)->if_name, (ifp)->if_unit 236 #else 237 #define SPP_FMT "%s: " 238 #define SPP_ARGS(ifp) (ifp)->if_xname 239 #endif 240 241 #ifdef INET 242 /* 243 * The following disgusting hack gets around the problem that IP TOS 244 * can't be set yet. We want to put "interactive" traffic on a high 245 * priority queue. To decide if traffic is interactive, we check that 246 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 247 * 248 * XXX is this really still necessary? - joerg - 249 */ 250 static u_short interactive_ports[8] = { 251 0, 513, 0, 0, 252 0, 21, 0, 23, 253 }; 254 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 255 #endif 256 257 /* almost every function needs these */ 258 #define STDDCL \ 259 struct ifnet *ifp = &sp->pp_if; \ 260 int debug = ifp->if_flags & IFF_DEBUG 261 262 static int sppp_output(struct ifnet *ifp, struct mbuf *m, 263 struct sockaddr *dst, struct rtentry *rt); 264 265 static void sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2); 266 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m); 267 268 static void sppp_cp_input(const struct cp *cp, struct sppp *sp, 269 struct mbuf *m); 270 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 271 u_char ident, u_short len, void *data); 272 /* static void sppp_cp_timeout(void *arg); */ 273 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp, 274 int newstate); 275 static void sppp_auth_send(const struct cp *cp, 276 struct sppp *sp, unsigned int type, unsigned int id, 277 ...); 278 279 static void sppp_up_event(const struct cp *cp, struct sppp *sp); 280 static void sppp_down_event(const struct cp *cp, struct sppp *sp); 281 static void sppp_open_event(const struct cp *cp, struct sppp *sp); 282 static void sppp_close_event(const struct cp *cp, struct sppp *sp); 283 static void sppp_to_event(const struct cp *cp, struct sppp *sp); 284 285 static void sppp_null(struct sppp *sp); 286 287 static void sppp_lcp_init(struct sppp *sp); 288 static void sppp_lcp_up(struct sppp *sp); 289 static void sppp_lcp_down(struct sppp *sp); 290 static void sppp_lcp_open(struct sppp *sp); 291 static void sppp_lcp_close(struct sppp *sp); 292 static void sppp_lcp_TO(void *sp); 293 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 294 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 295 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 296 static void sppp_lcp_tlu(struct sppp *sp); 297 static void sppp_lcp_tld(struct sppp *sp); 298 static void sppp_lcp_tls(struct sppp *sp); 299 static void sppp_lcp_tlf(struct sppp *sp); 300 static void sppp_lcp_scr(struct sppp *sp); 301 static void sppp_lcp_check_and_close(struct sppp *sp); 302 static int sppp_ncp_check(struct sppp *sp); 303 304 static void sppp_ipcp_init(struct sppp *sp); 305 static void sppp_ipcp_up(struct sppp *sp); 306 static void sppp_ipcp_down(struct sppp *sp); 307 static void sppp_ipcp_open(struct sppp *sp); 308 static void sppp_ipcp_close(struct sppp *sp); 309 static void sppp_ipcp_TO(void *sp); 310 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 311 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 312 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 313 static void sppp_ipcp_tlu(struct sppp *sp); 314 static void sppp_ipcp_tld(struct sppp *sp); 315 static void sppp_ipcp_tls(struct sppp *sp); 316 static void sppp_ipcp_tlf(struct sppp *sp); 317 static void sppp_ipcp_scr(struct sppp *sp); 318 319 static void sppp_ipv6cp_init(struct sppp *sp); 320 static void sppp_ipv6cp_up(struct sppp *sp); 321 static void sppp_ipv6cp_down(struct sppp *sp); 322 static void sppp_ipv6cp_open(struct sppp *sp); 323 static void sppp_ipv6cp_close(struct sppp *sp); 324 static void sppp_ipv6cp_TO(void *sp); 325 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len); 326 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 327 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 328 static void sppp_ipv6cp_tlu(struct sppp *sp); 329 static void sppp_ipv6cp_tld(struct sppp *sp); 330 static void sppp_ipv6cp_tls(struct sppp *sp); 331 static void sppp_ipv6cp_tlf(struct sppp *sp); 332 static void sppp_ipv6cp_scr(struct sppp *sp); 333 334 static void sppp_pap_input(struct sppp *sp, struct mbuf *m); 335 static void sppp_pap_init(struct sppp *sp); 336 static void sppp_pap_open(struct sppp *sp); 337 static void sppp_pap_close(struct sppp *sp); 338 static void sppp_pap_TO(void *sp); 339 static void sppp_pap_my_TO(void *sp); 340 static void sppp_pap_tlu(struct sppp *sp); 341 static void sppp_pap_tld(struct sppp *sp); 342 static void sppp_pap_scr(struct sppp *sp); 343 344 static void sppp_chap_input(struct sppp *sp, struct mbuf *m); 345 static void sppp_chap_init(struct sppp *sp); 346 static void sppp_chap_open(struct sppp *sp); 347 static void sppp_chap_close(struct sppp *sp); 348 static void sppp_chap_TO(void *sp); 349 static void sppp_chap_tlu(struct sppp *sp); 350 static void sppp_chap_tld(struct sppp *sp); 351 static void sppp_chap_scr(struct sppp *sp); 352 353 static const char *sppp_auth_type_name(u_short proto, u_char type); 354 static const char *sppp_cp_type_name(u_char type); 355 static const char *sppp_dotted_quad(u_int32_t addr); 356 static const char *sppp_ipcp_opt_name(u_char opt); 357 #ifdef INET6 358 static const char *sppp_ipv6cp_opt_name(u_char opt); 359 #endif 360 static const char *sppp_lcp_opt_name(u_char opt); 361 static const char *sppp_phase_name(int phase); 362 static const char *sppp_proto_name(u_short proto); 363 static const char *sppp_state_name(int state); 364 static int sppp_params(struct sppp *sp, int cmd, void *data); 365 static void sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, 366 u_int32_t *srcmask); 367 static void sppp_keepalive(void *dummy); 368 static void sppp_phase_network(struct sppp *sp); 369 static void sppp_print_bytes(const u_char *p, u_short len); 370 static void sppp_print_string(const char *p, u_short len); 371 static void sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr); 372 static void sppp_clear_ip_addrs(struct sppp *sp); 373 #ifdef INET6 374 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, 375 struct in6_addr *dst, struct in6_addr *srcmask); 376 #ifdef IPV6CP_MYIFID_DYN 377 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src); 378 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src); 379 #endif 380 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src); 381 #endif 382 383 /* our control protocol descriptors */ 384 static const struct cp lcp = { 385 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 386 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close, 387 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, 388 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, 389 sppp_lcp_scr 390 }; 391 392 static const struct cp ipcp = { 393 PPP_IPCP, IDX_IPCP, 394 #ifdef INET 395 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 396 #else 397 0, 398 #endif 399 "ipcp", 400 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close, 401 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, 402 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf, 403 sppp_ipcp_scr 404 }; 405 406 static const struct cp ipv6cp = { 407 PPP_IPV6CP, IDX_IPV6CP, 408 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 409 CP_NCP, 410 #else 411 0, 412 #endif 413 "ipv6cp", 414 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close, 415 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak, 416 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf, 417 sppp_ipv6cp_scr 418 }; 419 420 static const struct cp pap = { 421 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 422 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close, 423 sppp_pap_TO, 0, 0, 0, 424 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null, 425 sppp_pap_scr 426 }; 427 428 static const struct cp chap = { 429 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 430 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close, 431 sppp_chap_TO, 0, 0, 0, 432 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null, 433 sppp_chap_scr 434 }; 435 436 static const struct cp *cps[IDX_COUNT] = { 437 &lcp, /* IDX_LCP */ 438 &ipcp, /* IDX_IPCP */ 439 &ipv6cp, /* IDX_IPV6CP */ 440 &pap, /* IDX_PAP */ 441 &chap, /* IDX_CHAP */ 442 }; 443 444 445 /* 446 * Exported functions, comprising our interface to the lower layer. 447 */ 448 449 /* 450 * Process the received packet. 451 */ 452 void 453 sppp_input(struct ifnet *ifp, struct mbuf *m) 454 { 455 struct ppp_header *h = NULL; 456 struct ifqueue *inq = 0; 457 u_int16_t protocol; 458 int s; 459 struct sppp *sp = (struct sppp *)ifp; 460 int debug = ifp->if_flags & IFF_DEBUG; 461 462 if (ifp->if_flags & IFF_UP) 463 /* Count received bytes, add hardware framing */ 464 ifp->if_ibytes += m->m_pkthdr.len + sp->pp_framebytes; 465 466 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 467 /* Too small packet, drop it. */ 468 if (debug) 469 log(LOG_DEBUG, 470 SPP_FMT "input packet is too small, %d bytes\n", 471 SPP_ARGS(ifp), m->m_pkthdr.len); 472 drop: 473 ++ifp->if_ierrors; 474 ++ifp->if_iqdrops; 475 m_freem (m); 476 return; 477 } 478 479 if (sp->pp_flags & PP_NOFRAMING) { 480 memcpy(&protocol, mtod(m, void *), 2); 481 protocol = ntohs(protocol); 482 m_adj(m, 2); 483 } else { 484 485 /* Get PPP header. */ 486 h = mtod (m, struct ppp_header*); 487 m_adj (m, PPP_HEADER_LEN); 488 489 switch (h->address) { 490 case PPP_ALLSTATIONS: 491 if (h->control != PPP_UI) 492 goto invalid; 493 if (sp->pp_flags & PP_CISCO) { 494 if (debug) 495 log(LOG_DEBUG, 496 SPP_FMT "PPP packet in Cisco mode " 497 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 498 SPP_ARGS(ifp), 499 h->address, h->control, ntohs(h->protocol)); 500 goto drop; 501 } 502 break; 503 case CISCO_MULTICAST: 504 case CISCO_UNICAST: 505 /* Don't check the control field here (RFC 1547). */ 506 if (! (sp->pp_flags & PP_CISCO)) { 507 if (debug) 508 log(LOG_DEBUG, 509 SPP_FMT "Cisco packet in PPP mode " 510 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 511 SPP_ARGS(ifp), 512 h->address, h->control, ntohs(h->protocol)); 513 goto drop; 514 } 515 switch (ntohs (h->protocol)) { 516 default: 517 ++ifp->if_noproto; 518 goto invalid; 519 case CISCO_KEEPALIVE: 520 sppp_cisco_input ((struct sppp*) ifp, m); 521 m_freem (m); 522 return; 523 #ifdef INET 524 case ETHERTYPE_IP: 525 schednetisr (NETISR_IP); 526 inq = &ipintrq; 527 break; 528 #endif 529 #ifdef INET6 530 case ETHERTYPE_IPV6: 531 schednetisr (NETISR_IPV6); 532 inq = &ip6intrq; 533 break; 534 #endif 535 #ifdef IPX 536 case ETHERTYPE_IPX: 537 schednetisr (NETISR_IPX); 538 inq = &ipxintrq; 539 break; 540 #endif 541 #ifdef NS 542 case ETHERTYPE_NS: 543 schednetisr (NETISR_NS); 544 inq = &nsintrq; 545 break; 546 #endif 547 } 548 goto queue_pkt; 549 default: /* Invalid PPP packet. */ 550 invalid: 551 if (debug) 552 log(LOG_DEBUG, 553 SPP_FMT "invalid input packet " 554 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 555 SPP_ARGS(ifp), 556 h->address, h->control, ntohs(h->protocol)); 557 goto drop; 558 } 559 protocol = ntohs (h->protocol); 560 } 561 562 switch (protocol) { 563 default: 564 if (sp->state[IDX_LCP] == STATE_OPENED) { 565 u_int16_t prot = htons(protocol); 566 sppp_cp_send (sp, PPP_LCP, PROTO_REJ, 567 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2, 568 &prot); 569 } 570 if (debug) 571 log(LOG_DEBUG, 572 SPP_FMT "invalid input protocol " 573 "<proto=0x%x>\n", SPP_ARGS(ifp), ntohs(protocol)); 574 ++ifp->if_noproto; 575 goto drop; 576 case PPP_LCP: 577 sppp_cp_input(&lcp, sp, m); 578 m_freem (m); 579 return; 580 case PPP_PAP: 581 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 582 sppp_pap_input(sp, m); 583 m_freem (m); 584 return; 585 case PPP_CHAP: 586 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 587 sppp_chap_input(sp, m); 588 m_freem (m); 589 return; 590 #ifdef INET 591 case PPP_IPCP: 592 if (sp->pp_phase == SPPP_PHASE_NETWORK) 593 sppp_cp_input(&ipcp, sp, m); 594 m_freem (m); 595 return; 596 case PPP_IP: 597 if (sp->state[IDX_IPCP] == STATE_OPENED) { 598 schednetisr (NETISR_IP); 599 inq = &ipintrq; 600 sp->pp_last_activity = mono_time.tv_sec; 601 } 602 break; 603 #endif 604 #ifdef INET6 605 case PPP_IPV6CP: 606 if (sp->pp_phase == SPPP_PHASE_NETWORK) 607 sppp_cp_input(&ipv6cp, sp, m); 608 m_freem (m); 609 return; 610 611 case PPP_IPV6: 612 if (sp->state[IDX_IPV6CP] == STATE_OPENED) { 613 schednetisr (NETISR_IPV6); 614 inq = &ip6intrq; 615 sp->pp_last_activity = mono_time.tv_sec; 616 } 617 break; 618 #endif 619 #ifdef IPX 620 case PPP_IPX: 621 /* IPX IPXCP not implemented yet */ 622 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 623 schednetisr (NETISR_IPX); 624 inq = &ipxintrq; 625 } 626 break; 627 #endif 628 #ifdef NS 629 case PPP_XNS: 630 /* XNS IDPCP not implemented yet */ 631 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 632 schednetisr (NETISR_NS); 633 inq = &nsintrq; 634 } 635 break; 636 #endif 637 #ifdef ISO 638 case PPP_ISO: 639 /* OSI NLCP not implemented yet */ 640 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 641 schednetisr (NETISR_ISO); 642 inq = &clnlintrq; 643 } 644 break; 645 #endif 646 } 647 648 queue_pkt: 649 if (! (ifp->if_flags & IFF_UP) || ! inq) 650 goto drop; 651 652 /* Check queue. */ 653 s = splnet(); 654 if (IF_QFULL (inq)) { 655 /* Queue overflow. */ 656 IF_DROP(inq); 657 splx(s); 658 if (debug) 659 log(LOG_DEBUG, SPP_FMT "protocol queue overflow\n", 660 SPP_ARGS(ifp)); 661 goto drop; 662 } 663 IF_ENQUEUE(inq, m); 664 splx(s); 665 } 666 667 /* 668 * Enqueue transmit packet. 669 */ 670 static int 671 sppp_output(struct ifnet *ifp, struct mbuf *m, 672 struct sockaddr *dst, struct rtentry *rt) 673 { 674 struct sppp *sp = (struct sppp*) ifp; 675 struct ppp_header *h = NULL; 676 struct ifqueue *ifq = NULL; /* XXX */ 677 int s, len, rv = 0; 678 u_int16_t protocol; 679 ALTQ_DECL(struct altq_pktattr pktattr;) 680 681 s = splnet(); 682 683 sp->pp_last_activity = mono_time.tv_sec; 684 685 if ((ifp->if_flags & IFF_UP) == 0 || 686 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 687 m_freem (m); 688 splx (s); 689 return (ENETDOWN); 690 } 691 692 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 693 /* 694 * Interface is not yet running, but auto-dial. Need 695 * to start LCP for it. 696 */ 697 ifp->if_flags |= IFF_RUNNING; 698 splx(s); 699 lcp.Open(sp); 700 s = splnet(); 701 } 702 703 /* 704 * If the queueing discipline needs packet classification, 705 * do it before prepending link headers. 706 */ 707 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr); 708 709 #ifdef INET 710 if (dst->sa_family == AF_INET) { 711 struct ip *ip = NULL; 712 struct tcphdr *th = NULL; 713 714 if (m->m_len >= sizeof(struct ip)) { 715 ip = mtod (m, struct ip*); 716 if (ip->ip_p == IPPROTO_TCP && 717 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + 718 sizeof(struct tcphdr)) { 719 th = (struct tcphdr *) 720 ((caddr_t)ip + (ip->ip_hl << 2)); 721 } 722 } else 723 ip = NULL; 724 725 /* 726 * When using dynamic local IP address assignment by using 727 * 0.0.0.0 as a local address, the first TCP session will 728 * not connect because the local TCP checksum is computed 729 * using 0.0.0.0 which will later become our real IP address 730 * so the TCP checksum computed at the remote end will 731 * become invalid. So we 732 * - don't let packets with src ip addr 0 thru 733 * - we flag TCP packets with src ip 0 as an error 734 */ 735 if (ip && ip->ip_src.s_addr == INADDR_ANY) { 736 u_int8_t proto = ip->ip_p; 737 738 m_freem(m); 739 splx(s); 740 if (proto == IPPROTO_TCP) 741 return(EADDRNOTAVAIL); 742 else 743 return(0); 744 } 745 746 /* 747 * Put low delay, telnet, rlogin and ftp control packets 748 * in front of the queue. 749 */ 750 751 if (!IF_QFULL(&sp->pp_fastq) && 752 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 753 (th && (INTERACTIVE(ntohs(th->th_sport)) || 754 INTERACTIVE(ntohs(th->th_dport)))))) 755 ifq = &sp->pp_fastq; 756 } 757 #endif 758 759 #ifdef INET6 760 if (dst->sa_family == AF_INET6) { 761 /* XXX do something tricky here? */ 762 } 763 #endif 764 765 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 766 /* 767 * Prepend general data packet PPP header. For now, IP only. 768 */ 769 M_PREPEND (m, PPP_HEADER_LEN, M_DONTWAIT); 770 if (! m) { 771 if (ifp->if_flags & IFF_DEBUG) 772 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 773 SPP_ARGS(ifp)); 774 ++ifp->if_oerrors; 775 splx (s); 776 return (ENOBUFS); 777 } 778 /* 779 * May want to check size of packet 780 * (albeit due to the implementation it's always enough) 781 */ 782 h = mtod (m, struct ppp_header*); 783 if (sp->pp_flags & PP_CISCO) { 784 h->address = CISCO_UNICAST; /* unicast address */ 785 h->control = 0; 786 } else { 787 h->address = PPP_ALLSTATIONS; /* broadcast address */ 788 h->control = PPP_UI; /* Unnumbered Info */ 789 } 790 } 791 792 switch (dst->sa_family) { 793 #ifdef INET 794 case AF_INET: /* Internet Protocol */ 795 if (sp->pp_flags & PP_CISCO) 796 protocol = htons (ETHERTYPE_IP); 797 else { 798 /* 799 * Don't choke with an ENETDOWN early. It's 800 * possible that we just started dialing out, 801 * so don't drop the packet immediately. If 802 * we notice that we run out of buffer space 803 * below, we will however remember that we are 804 * not ready to carry IP packets, and return 805 * ENETDOWN, as opposed to ENOBUFS. 806 */ 807 protocol = htons(PPP_IP); 808 if (sp->state[IDX_IPCP] != STATE_OPENED) 809 rv = ENETDOWN; 810 } 811 break; 812 #endif 813 #ifdef INET6 814 case AF_INET6: /* Internet Protocol version 6 */ 815 if (sp->pp_flags & PP_CISCO) 816 protocol = htons (ETHERTYPE_IPV6); 817 else { 818 /* 819 * Don't choke with an ENETDOWN early. It's 820 * possible that we just started dialing out, 821 * so don't drop the packet immediately. If 822 * we notice that we run out of buffer space 823 * below, we will however remember that we are 824 * not ready to carry IP packets, and return 825 * ENETDOWN, as opposed to ENOBUFS. 826 */ 827 protocol = htons(PPP_IPV6); 828 if (sp->state[IDX_IPV6CP] != STATE_OPENED) 829 rv = ENETDOWN; 830 } 831 break; 832 #endif 833 #ifdef NS 834 case AF_NS: /* Xerox NS Protocol */ 835 protocol = htons ((sp->pp_flags & PP_CISCO) ? 836 ETHERTYPE_NS : PPP_XNS); 837 break; 838 #endif 839 #ifdef IPX 840 case AF_IPX: /* Novell IPX Protocol */ 841 protocol = htons ((sp->pp_flags & PP_CISCO) ? 842 ETHERTYPE_IPX : PPP_IPX); 843 break; 844 #endif 845 #ifdef ISO 846 case AF_ISO: /* ISO OSI Protocol */ 847 if (sp->pp_flags & PP_CISCO) 848 goto nosupport; 849 protocol = htons (PPP_ISO); 850 break; 851 nosupport: 852 #endif 853 default: 854 m_freem (m); 855 ++ifp->if_oerrors; 856 splx (s); 857 return (EAFNOSUPPORT); 858 } 859 860 if (sp->pp_flags & PP_NOFRAMING) { 861 M_PREPEND (m, 2, M_DONTWAIT); 862 if (m == NULL) { 863 if (ifp->if_flags & IFF_DEBUG) 864 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 865 SPP_ARGS(ifp)); 866 ++ifp->if_oerrors; 867 splx (s); 868 return (ENOBUFS); 869 } 870 *mtod(m, u_int16_t*) = protocol; 871 } else { 872 h->protocol = protocol; 873 } 874 875 /* 876 * Queue message on interface, and start output if interface 877 * not yet active. 878 */ 879 len = m->m_pkthdr.len; 880 if (ifq != NULL 881 #ifdef ALTQ 882 && ALTQ_IS_ENABLED(&ifp->if_snd) == 0 883 #endif 884 ) { 885 if (IF_QFULL (ifq)) { 886 IF_DROP (&ifp->if_snd); 887 m_freem (m); 888 if (rv == 0) 889 rv = ENOBUFS; 890 } 891 else 892 IF_ENQUEUE(ifq, m); 893 } else 894 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, rv); 895 if (rv != 0) { 896 ++ifp->if_oerrors; 897 splx(s); 898 return (rv); 899 } 900 901 if (! (ifp->if_flags & IFF_OACTIVE)) 902 (*ifp->if_start) (ifp); 903 904 /* 905 * Count output packets and bytes. 906 * The packet length includes header + additional hardware framing 907 * according to RFC 1333. 908 */ 909 ifp->if_obytes += len + sp->pp_framebytes; 910 splx (s); 911 return (0); 912 } 913 914 void 915 sppp_attach(struct ifnet *ifp) 916 { 917 struct sppp *sp = (struct sppp*) ifp; 918 919 /* Initialize keepalive handler. */ 920 if (! spppq) { 921 callout_init(&keepalive_ch); 922 callout_reset(&keepalive_ch, hz * 10, sppp_keepalive, NULL); 923 } 924 925 /* Insert new entry into the keepalive list. */ 926 sp->pp_next = spppq; 927 spppq = sp; 928 929 sp->pp_if.if_type = IFT_PPP; 930 sp->pp_if.if_output = sppp_output; 931 sp->pp_fastq.ifq_maxlen = 32; 932 sp->pp_cpq.ifq_maxlen = 20; 933 sp->pp_loopcnt = 0; 934 sp->pp_alivecnt = 0; 935 sp->pp_last_activity = 0; 936 sp->pp_idle_timeout = 0; 937 memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq)); 938 memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq)); 939 sp->pp_auth_failures = 0; 940 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 941 sp->pp_phase = SPPP_PHASE_DEAD; 942 sp->pp_up = lcp.Up; 943 sp->pp_down = lcp.Down; 944 945 if_alloc_sadl(ifp); 946 947 memset(&sp->myauth, 0, sizeof sp->myauth); 948 memset(&sp->hisauth, 0, sizeof sp->hisauth); 949 sppp_lcp_init(sp); 950 sppp_ipcp_init(sp); 951 sppp_ipv6cp_init(sp); 952 sppp_pap_init(sp); 953 sppp_chap_init(sp); 954 } 955 956 void 957 sppp_detach(struct ifnet *ifp) 958 { 959 struct sppp **q, *p, *sp = (struct sppp*) ifp; 960 int i; 961 962 /* Remove the entry from the keepalive list. */ 963 for (q = &spppq; (p = *q); q = &p->pp_next) 964 if (p == sp) { 965 *q = p->pp_next; 966 break; 967 } 968 969 /* Stop keepalive handler. */ 970 if (! spppq) { 971 callout_stop(&keepalive_ch); 972 } 973 974 for (i = 0; i < IDX_COUNT; i++) { 975 callout_stop(&sp->ch[i]); 976 } 977 callout_stop(&sp->pap_my_to_ch); 978 979 /* free authentication info */ 980 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 981 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 982 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 983 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 984 985 if_free_sadl(ifp); 986 } 987 988 /* 989 * Flush the interface output queue. 990 */ 991 void 992 sppp_flush(struct ifnet *ifp) 993 { 994 struct sppp *sp = (struct sppp*) ifp; 995 996 IFQ_PURGE (&sp->pp_if.if_snd); 997 IF_PURGE (&sp->pp_fastq); 998 IF_PURGE (&sp->pp_cpq); 999 } 1000 1001 /* 1002 * Check if the output queue is empty. 1003 */ 1004 int 1005 sppp_isempty(struct ifnet *ifp) 1006 { 1007 struct sppp *sp = (struct sppp*) ifp; 1008 int empty, s; 1009 1010 s = splnet(); 1011 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1012 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1013 splx(s); 1014 return (empty); 1015 } 1016 1017 /* 1018 * Get next packet to send. 1019 */ 1020 struct mbuf * 1021 sppp_dequeue(struct ifnet *ifp) 1022 { 1023 struct sppp *sp = (struct sppp*) ifp; 1024 struct mbuf *m; 1025 int s; 1026 1027 s = splnet(); 1028 /* 1029 * Process only the control protocol queue until we have at 1030 * least one NCP open. 1031 * 1032 * Do always serve all three queues in Cisco mode. 1033 */ 1034 IF_DEQUEUE(&sp->pp_cpq, m); 1035 if (m == NULL && 1036 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1037 IF_DEQUEUE(&sp->pp_fastq, m); 1038 if (m == NULL) 1039 IF_DEQUEUE (&sp->pp_if.if_snd, m); 1040 } 1041 splx(s); 1042 return m; 1043 } 1044 1045 /* 1046 * Pick the next packet, do not remove it from the queue. 1047 */ 1048 struct mbuf * 1049 sppp_pick(struct ifnet *ifp) 1050 { 1051 struct sppp *sp = (struct sppp*)ifp; 1052 struct mbuf *m; 1053 int s; 1054 1055 s= splnet (); 1056 1057 m = sp->pp_cpq.ifq_head; 1058 if (m == NULL && 1059 (sp->pp_phase == SPPP_PHASE_NETWORK || 1060 (sp->pp_flags & PP_CISCO) != 0)) 1061 if ((m = sp->pp_fastq.ifq_head) == NULL) 1062 m = sp->pp_if.if_snd.ifq_head; 1063 splx (s); 1064 return (m); 1065 } 1066 1067 /* 1068 * Process an ioctl request. Called on low priority level. 1069 */ 1070 int 1071 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1072 { 1073 struct ifreq *ifr = (struct ifreq*) data; 1074 struct sppp *sp = (struct sppp*) ifp; 1075 int s, error=0, going_up, going_down, newmode; 1076 1077 s = splnet(); 1078 switch (cmd) { 1079 case SIOCAIFADDR: 1080 case SIOCSIFDSTADDR: 1081 break; 1082 1083 case SIOCSIFADDR: 1084 if_up(ifp); 1085 /* fall through... */ 1086 1087 case SIOCSIFFLAGS: 1088 going_up = ifp->if_flags & IFF_UP && 1089 (ifp->if_flags & IFF_RUNNING) == 0; 1090 going_down = (ifp->if_flags & IFF_UP) == 0 && 1091 ifp->if_flags & IFF_RUNNING; 1092 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1093 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1094 /* sanity */ 1095 newmode = IFF_PASSIVE; 1096 ifp->if_flags &= ~IFF_AUTO; 1097 } 1098 1099 if (going_up || going_down) 1100 lcp.Close(sp); 1101 if (going_up && newmode == 0) { 1102 /* neither auto-dial nor passive */ 1103 ifp->if_flags |= IFF_RUNNING; 1104 if (!(sp->pp_flags & PP_CISCO)) 1105 lcp.Open(sp); 1106 } else if (going_down) { 1107 sppp_flush(ifp); 1108 ifp->if_flags &= ~IFF_RUNNING; 1109 } 1110 1111 break; 1112 1113 #ifdef SIOCSIFMTU 1114 #ifndef ifr_mtu 1115 #define ifr_mtu ifr_metric 1116 #endif 1117 case SIOCSIFMTU: 1118 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru) 1119 return (EINVAL); 1120 ifp->if_mtu = ifr->ifr_mtu; 1121 break; 1122 #endif 1123 #ifdef SLIOCSETMTU 1124 case SLIOCSETMTU: 1125 if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru) 1126 return (EINVAL); 1127 ifp->if_mtu = *(short*)data; 1128 break; 1129 #endif 1130 #ifdef SIOCGIFMTU 1131 case SIOCGIFMTU: 1132 ifr->ifr_mtu = ifp->if_mtu; 1133 break; 1134 #endif 1135 #ifdef SLIOCGETMTU 1136 case SLIOCGETMTU: 1137 *(short*)data = ifp->if_mtu; 1138 break; 1139 #endif 1140 case SIOCADDMULTI: 1141 case SIOCDELMULTI: 1142 break; 1143 1144 case SPPPSETAUTHCFG: 1145 case SPPPSETLCPCFG: 1146 case SPPPSETIDLETO: 1147 case SPPPSETAUTHFAILURE: 1148 case SPPPSETDNSOPTS: 1149 { 1150 struct proc *p = curproc; /* XXX */ 1151 1152 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1153 break; 1154 } 1155 /* FALLTHROUGH */ 1156 case SPPPGETAUTHCFG: 1157 case SPPPGETLCPCFG: 1158 case SPPPGETSTATUS: 1159 case SPPPGETIDLETO: 1160 case SPPPGETAUTHFAILURES: 1161 case SPPPGETDNSOPTS: 1162 case SPPPGETDNSADDRS: 1163 error = sppp_params(sp, cmd, data); 1164 break; 1165 1166 default: 1167 error = ENOTTY; 1168 } 1169 splx(s); 1170 return (error); 1171 } 1172 1173 1174 /* 1175 * Cisco framing implementation. 1176 */ 1177 1178 /* 1179 * Handle incoming Cisco keepalive protocol packets. 1180 */ 1181 static void 1182 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1183 { 1184 STDDCL; 1185 struct cisco_packet *h; 1186 u_int32_t me, mymask; 1187 1188 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1189 if (debug) 1190 log(LOG_DEBUG, 1191 SPP_FMT "cisco invalid packet length: %d bytes\n", 1192 SPP_ARGS(ifp), m->m_pkthdr.len); 1193 return; 1194 } 1195 h = mtod (m, struct cisco_packet*); 1196 if (debug) 1197 log(LOG_DEBUG, 1198 SPP_FMT "cisco input: %d bytes " 1199 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1200 SPP_ARGS(ifp), m->m_pkthdr.len, 1201 ntohl (h->type), h->par1, h->par2, (u_int)h->rel, 1202 (u_int)h->time0, (u_int)h->time1); 1203 switch (ntohl (h->type)) { 1204 default: 1205 if (debug) 1206 addlog(SPP_FMT "cisco unknown packet type: 0x%x\n", 1207 SPP_ARGS(ifp), ntohl (h->type)); 1208 break; 1209 case CISCO_ADDR_REPLY: 1210 /* Reply on address request, ignore */ 1211 break; 1212 case CISCO_KEEPALIVE_REQ: 1213 sp->pp_alivecnt = 0; 1214 sp->pp_rseq[IDX_LCP] = ntohl (h->par1); 1215 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1216 /* Local and remote sequence numbers are equal. 1217 * Probably, the line is in loopback mode. */ 1218 if (sp->pp_loopcnt >= MAXALIVECNT) { 1219 printf (SPP_FMT "loopback\n", 1220 SPP_ARGS(ifp)); 1221 sp->pp_loopcnt = 0; 1222 if (ifp->if_flags & IFF_UP) { 1223 if_down (ifp); 1224 IF_PURGE (&sp->pp_cpq); 1225 } 1226 } 1227 ++sp->pp_loopcnt; 1228 1229 /* Generate new local sequence number */ 1230 sp->pp_seq[IDX_LCP] = random(); 1231 break; 1232 } 1233 sp->pp_loopcnt = 0; 1234 if (! (ifp->if_flags & IFF_UP) && 1235 (ifp->if_flags & IFF_RUNNING)) { 1236 if_up(ifp); 1237 } 1238 break; 1239 case CISCO_ADDR_REQ: 1240 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1241 if (me != 0L) 1242 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1243 break; 1244 } 1245 } 1246 1247 /* 1248 * Send Cisco keepalive packet. 1249 */ 1250 static void 1251 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1252 { 1253 STDDCL; 1254 struct ppp_header *h; 1255 struct cisco_packet *ch; 1256 struct mbuf *m; 1257 u_int32_t t = (time.tv_sec - boottime.tv_sec) * 1000; 1258 1259 MGETHDR (m, M_DONTWAIT, MT_DATA); 1260 if (! m) 1261 return; 1262 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1263 m->m_pkthdr.rcvif = 0; 1264 1265 h = mtod (m, struct ppp_header*); 1266 h->address = CISCO_MULTICAST; 1267 h->control = 0; 1268 h->protocol = htons (CISCO_KEEPALIVE); 1269 1270 ch = (struct cisco_packet*) (h + 1); 1271 ch->type = htonl (type); 1272 ch->par1 = htonl (par1); 1273 ch->par2 = htonl (par2); 1274 ch->rel = -1; 1275 1276 ch->time0 = htons ((u_short) (t >> 16)); 1277 ch->time1 = htons ((u_short) t); 1278 1279 if (debug) 1280 log(LOG_DEBUG, 1281 SPP_FMT "cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1282 SPP_ARGS(ifp), ntohl (ch->type), ch->par1, 1283 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1284 (u_int)ch->time1); 1285 1286 if (IF_QFULL (&sp->pp_cpq)) { 1287 IF_DROP (&sp->pp_fastq); 1288 IF_DROP (&ifp->if_snd); 1289 m_freem (m); 1290 ++ifp->if_oerrors; 1291 return; 1292 } else 1293 IF_ENQUEUE (&sp->pp_cpq, m); 1294 if (! (ifp->if_flags & IFF_OACTIVE)) 1295 (*ifp->if_start) (ifp); 1296 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1297 } 1298 1299 /* 1300 * PPP protocol implementation. 1301 */ 1302 1303 /* 1304 * Send PPP control protocol packet. 1305 */ 1306 static void 1307 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1308 u_char ident, u_short len, void *data) 1309 { 1310 STDDCL; 1311 struct lcp_header *lh; 1312 struct mbuf *m; 1313 size_t pkthdrlen; 1314 1315 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1316 1317 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1318 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1319 MGETHDR (m, M_DONTWAIT, MT_DATA); 1320 if (! m) 1321 return; 1322 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1323 m->m_pkthdr.rcvif = 0; 1324 1325 if (sp->pp_flags & PP_NOFRAMING) { 1326 *mtod(m, u_int16_t*) = htons(proto); 1327 lh = (struct lcp_header*)(mtod(m, u_int8_t*) + 2); 1328 } else { 1329 struct ppp_header *h; 1330 h = mtod (m, struct ppp_header*); 1331 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1332 h->control = PPP_UI; /* Unnumbered Info */ 1333 h->protocol = htons (proto); /* Link Control Protocol */ 1334 lh = (struct lcp_header*) (h + 1); 1335 } 1336 lh->type = type; 1337 lh->ident = ident; 1338 lh->len = htons (LCP_HEADER_LEN + len); 1339 if (len) 1340 bcopy (data, lh+1, len); 1341 1342 if (debug) { 1343 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 1344 SPP_ARGS(ifp), 1345 sppp_proto_name(proto), 1346 sppp_cp_type_name (lh->type), lh->ident, 1347 ntohs (lh->len)); 1348 if (len) 1349 sppp_print_bytes ((u_char*) (lh+1), len); 1350 addlog(">\n"); 1351 } 1352 if (IF_QFULL (&sp->pp_cpq)) { 1353 IF_DROP (&sp->pp_fastq); 1354 IF_DROP (&ifp->if_snd); 1355 m_freem (m); 1356 ++ifp->if_oerrors; 1357 return; 1358 } else 1359 IF_ENQUEUE (&sp->pp_cpq, m); 1360 if (! (ifp->if_flags & IFF_OACTIVE)) 1361 (*ifp->if_start) (ifp); 1362 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1363 } 1364 1365 /* 1366 * Handle incoming PPP control protocol packets. 1367 */ 1368 static void 1369 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1370 { 1371 STDDCL; 1372 struct lcp_header *h; 1373 int len = m->m_pkthdr.len; 1374 int rv; 1375 u_char *p; 1376 u_int32_t u32; 1377 1378 if (len < 4) { 1379 if (debug) 1380 log(LOG_DEBUG, 1381 SPP_FMT "%s invalid packet length: %d bytes\n", 1382 SPP_ARGS(ifp), cp->name, len); 1383 return; 1384 } 1385 h = mtod (m, struct lcp_header*); 1386 if (debug) { 1387 log(LOG_DEBUG, 1388 SPP_FMT "%s input(%s): <%s id=0x%x len=%d", 1389 SPP_ARGS(ifp), cp->name, 1390 sppp_state_name(sp->state[cp->protoidx]), 1391 sppp_cp_type_name (h->type), h->ident, ntohs (h->len)); 1392 if (len > 4) 1393 sppp_print_bytes ((u_char*) (h+1), len-4); 1394 addlog(">\n"); 1395 } 1396 if (len > ntohs (h->len)) 1397 len = ntohs (h->len); 1398 p = (u_char *)(h + 1); 1399 switch (h->type) { 1400 case CONF_REQ: 1401 if (len < 4) { 1402 if (debug) 1403 addlog(SPP_FMT "%s invalid conf-req length %d\n", 1404 SPP_ARGS(ifp), cp->name, 1405 len); 1406 ++ifp->if_ierrors; 1407 break; 1408 } 1409 /* handle states where RCR doesn't get a SCA/SCN */ 1410 switch (sp->state[cp->protoidx]) { 1411 case STATE_CLOSING: 1412 case STATE_STOPPING: 1413 return; 1414 case STATE_CLOSED: 1415 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1416 0, 0); 1417 return; 1418 } 1419 rv = (cp->RCR)(sp, h, len); 1420 switch (sp->state[cp->protoidx]) { 1421 case STATE_OPENED: 1422 (cp->tld)(sp); 1423 (cp->scr)(sp); 1424 /* fall through... */ 1425 case STATE_ACK_SENT: 1426 case STATE_REQ_SENT: 1427 sppp_cp_change_state(cp, sp, rv? 1428 STATE_ACK_SENT: STATE_REQ_SENT); 1429 break; 1430 case STATE_STOPPED: 1431 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1432 (cp->scr)(sp); 1433 sppp_cp_change_state(cp, sp, rv? 1434 STATE_ACK_SENT: STATE_REQ_SENT); 1435 break; 1436 case STATE_ACK_RCVD: 1437 if (rv) { 1438 sppp_cp_change_state(cp, sp, STATE_OPENED); 1439 if (debug) 1440 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1441 SPP_ARGS(ifp), 1442 cp->name); 1443 (cp->tlu)(sp); 1444 } else 1445 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1446 break; 1447 default: 1448 printf(SPP_FMT "%s illegal %s in state %s\n", 1449 SPP_ARGS(ifp), cp->name, 1450 sppp_cp_type_name(h->type), 1451 sppp_state_name(sp->state[cp->protoidx])); 1452 ++ifp->if_ierrors; 1453 } 1454 break; 1455 case CONF_ACK: 1456 if (h->ident != sp->confid[cp->protoidx]) { 1457 if (debug) 1458 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1459 SPP_ARGS(ifp), cp->name, 1460 h->ident, sp->confid[cp->protoidx]); 1461 ++ifp->if_ierrors; 1462 break; 1463 } 1464 switch (sp->state[cp->protoidx]) { 1465 case STATE_CLOSED: 1466 case STATE_STOPPED: 1467 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1468 break; 1469 case STATE_CLOSING: 1470 case STATE_STOPPING: 1471 break; 1472 case STATE_REQ_SENT: 1473 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1474 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1475 break; 1476 case STATE_OPENED: 1477 (cp->tld)(sp); 1478 /* fall through */ 1479 case STATE_ACK_RCVD: 1480 (cp->scr)(sp); 1481 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1482 break; 1483 case STATE_ACK_SENT: 1484 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1485 sppp_cp_change_state(cp, sp, STATE_OPENED); 1486 if (debug) 1487 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1488 SPP_ARGS(ifp), cp->name); 1489 (cp->tlu)(sp); 1490 break; 1491 default: 1492 printf(SPP_FMT "%s illegal %s in state %s\n", 1493 SPP_ARGS(ifp), cp->name, 1494 sppp_cp_type_name(h->type), 1495 sppp_state_name(sp->state[cp->protoidx])); 1496 ++ifp->if_ierrors; 1497 } 1498 break; 1499 case CONF_NAK: 1500 case CONF_REJ: 1501 if (h->ident != sp->confid[cp->protoidx]) { 1502 if (debug) 1503 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1504 SPP_ARGS(ifp), cp->name, 1505 h->ident, sp->confid[cp->protoidx]); 1506 ++ifp->if_ierrors; 1507 break; 1508 } 1509 if (h->type == CONF_NAK) 1510 (cp->RCN_nak)(sp, h, len); 1511 else /* CONF_REJ */ 1512 (cp->RCN_rej)(sp, h, len); 1513 1514 switch (sp->state[cp->protoidx]) { 1515 case STATE_CLOSED: 1516 case STATE_STOPPED: 1517 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1518 break; 1519 case STATE_REQ_SENT: 1520 case STATE_ACK_SENT: 1521 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1522 (cp->scr)(sp); 1523 break; 1524 case STATE_OPENED: 1525 (cp->tld)(sp); 1526 /* fall through */ 1527 case STATE_ACK_RCVD: 1528 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1529 (cp->scr)(sp); 1530 break; 1531 case STATE_CLOSING: 1532 case STATE_STOPPING: 1533 break; 1534 default: 1535 printf(SPP_FMT "%s illegal %s in state %s\n", 1536 SPP_ARGS(ifp), cp->name, 1537 sppp_cp_type_name(h->type), 1538 sppp_state_name(sp->state[cp->protoidx])); 1539 ++ifp->if_ierrors; 1540 } 1541 break; 1542 1543 case TERM_REQ: 1544 switch (sp->state[cp->protoidx]) { 1545 case STATE_ACK_RCVD: 1546 case STATE_ACK_SENT: 1547 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1548 /* fall through */ 1549 case STATE_CLOSED: 1550 case STATE_STOPPED: 1551 case STATE_CLOSING: 1552 case STATE_STOPPING: 1553 case STATE_REQ_SENT: 1554 sta: 1555 /* Send Terminate-Ack packet. */ 1556 if (debug) 1557 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n", 1558 SPP_ARGS(ifp), cp->name); 1559 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1560 break; 1561 case STATE_OPENED: 1562 (cp->tld)(sp); 1563 sp->rst_counter[cp->protoidx] = 0; 1564 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1565 goto sta; 1566 break; 1567 default: 1568 printf(SPP_FMT "%s illegal %s in state %s\n", 1569 SPP_ARGS(ifp), cp->name, 1570 sppp_cp_type_name(h->type), 1571 sppp_state_name(sp->state[cp->protoidx])); 1572 ++ifp->if_ierrors; 1573 } 1574 break; 1575 case TERM_ACK: 1576 switch (sp->state[cp->protoidx]) { 1577 case STATE_CLOSED: 1578 case STATE_STOPPED: 1579 case STATE_REQ_SENT: 1580 case STATE_ACK_SENT: 1581 break; 1582 case STATE_CLOSING: 1583 (cp->tlf)(sp); 1584 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1585 sppp_lcp_check_and_close(sp); 1586 break; 1587 case STATE_STOPPING: 1588 (cp->tlf)(sp); 1589 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1590 sppp_lcp_check_and_close(sp); 1591 break; 1592 case STATE_ACK_RCVD: 1593 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1594 break; 1595 case STATE_OPENED: 1596 (cp->tld)(sp); 1597 (cp->scr)(sp); 1598 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1599 break; 1600 default: 1601 printf(SPP_FMT "%s illegal %s in state %s\n", 1602 SPP_ARGS(ifp), cp->name, 1603 sppp_cp_type_name(h->type), 1604 sppp_state_name(sp->state[cp->protoidx])); 1605 ++ifp->if_ierrors; 1606 } 1607 break; 1608 case CODE_REJ: 1609 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1610 log(LOG_INFO, 1611 SPP_FMT "%s: ignoring RXJ (%s) for code ?, " 1612 "danger will robinson\n", 1613 SPP_ARGS(ifp), cp->name, 1614 sppp_cp_type_name(h->type)); 1615 switch (sp->state[cp->protoidx]) { 1616 case STATE_CLOSED: 1617 case STATE_STOPPED: 1618 case STATE_REQ_SENT: 1619 case STATE_ACK_SENT: 1620 case STATE_CLOSING: 1621 case STATE_STOPPING: 1622 case STATE_OPENED: 1623 break; 1624 case STATE_ACK_RCVD: 1625 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1626 break; 1627 default: 1628 printf(SPP_FMT "%s illegal %s in state %s\n", 1629 SPP_ARGS(ifp), cp->name, 1630 sppp_cp_type_name(h->type), 1631 sppp_state_name(sp->state[cp->protoidx])); 1632 ++ifp->if_ierrors; 1633 } 1634 break; 1635 case PROTO_REJ: 1636 { 1637 int catastrophic; 1638 const struct cp *upper; 1639 int i; 1640 u_int16_t proto; 1641 1642 catastrophic = 0; 1643 upper = NULL; 1644 proto = p[0] << 8 | p[1]; 1645 for (i = 0; i < IDX_COUNT; i++) { 1646 if (cps[i]->proto == proto) { 1647 upper = cps[i]; 1648 break; 1649 } 1650 } 1651 if (upper == NULL) 1652 catastrophic++; 1653 1654 if (debug) 1655 log(LOG_INFO, 1656 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1657 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+', 1658 sppp_cp_type_name(h->type), proto, 1659 upper ? upper->name : "unknown", 1660 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1661 1662 /* 1663 * if we got RXJ+ against conf-req, the peer does not implement 1664 * this particular protocol type. terminate the protocol. 1665 */ 1666 if (upper && !catastrophic) { 1667 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1668 upper->Close(sp); 1669 break; 1670 } 1671 } 1672 1673 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1674 switch (sp->state[cp->protoidx]) { 1675 case STATE_CLOSED: 1676 case STATE_STOPPED: 1677 case STATE_REQ_SENT: 1678 case STATE_ACK_SENT: 1679 case STATE_CLOSING: 1680 case STATE_STOPPING: 1681 case STATE_OPENED: 1682 break; 1683 case STATE_ACK_RCVD: 1684 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1685 break; 1686 default: 1687 printf(SPP_FMT "%s illegal %s in state %s\n", 1688 SPP_ARGS(ifp), cp->name, 1689 sppp_cp_type_name(h->type), 1690 sppp_state_name(sp->state[cp->protoidx])); 1691 ++ifp->if_ierrors; 1692 } 1693 break; 1694 } 1695 case DISC_REQ: 1696 if (cp->proto != PPP_LCP) 1697 goto illegal; 1698 /* Discard the packet. */ 1699 break; 1700 case ECHO_REQ: 1701 if (cp->proto != PPP_LCP) 1702 goto illegal; 1703 if (sp->state[cp->protoidx] != STATE_OPENED) { 1704 if (debug) 1705 addlog(SPP_FMT "lcp echo req but lcp closed\n", 1706 SPP_ARGS(ifp)); 1707 ++ifp->if_ierrors; 1708 break; 1709 } 1710 if (len < 8) { 1711 if (debug) 1712 addlog(SPP_FMT "invalid lcp echo request " 1713 "packet length: %d bytes\n", 1714 SPP_ARGS(ifp), len); 1715 break; 1716 } 1717 memcpy(&u32, h + 1, sizeof u32); 1718 if (ntohl(u32) == sp->lcp.magic) { 1719 /* Line loopback mode detected. */ 1720 printf(SPP_FMT "loopback\n", SPP_ARGS(ifp)); 1721 if_down (ifp); 1722 IF_PURGE (&sp->pp_cpq); 1723 1724 /* Shut down the PPP link. */ 1725 /* XXX */ 1726 lcp.Down(sp); 1727 lcp.Up(sp); 1728 break; 1729 } 1730 u32 = htonl(sp->lcp.magic); 1731 memcpy(h + 1, &u32, sizeof u32); 1732 if (debug) 1733 addlog(SPP_FMT "got lcp echo req, sending echo rep\n", 1734 SPP_ARGS(ifp)); 1735 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1); 1736 break; 1737 case ECHO_REPLY: 1738 if (cp->proto != PPP_LCP) 1739 goto illegal; 1740 if (h->ident != sp->lcp.echoid) { 1741 ++ifp->if_ierrors; 1742 break; 1743 } 1744 if (len < 8) { 1745 if (debug) 1746 addlog(SPP_FMT "lcp invalid echo reply " 1747 "packet length: %d bytes\n", 1748 SPP_ARGS(ifp), len); 1749 break; 1750 } 1751 if (debug) 1752 addlog(SPP_FMT "lcp got echo rep\n", 1753 SPP_ARGS(ifp)); 1754 memcpy(&u32, h + 1, sizeof u32); 1755 if (ntohl(u32) != sp->lcp.magic) 1756 sp->pp_alivecnt = 0; 1757 break; 1758 default: 1759 /* Unknown packet type -- send Code-Reject packet. */ 1760 illegal: 1761 if (debug) 1762 addlog(SPP_FMT "%s send code-rej for 0x%x\n", 1763 SPP_ARGS(ifp), cp->name, h->type); 1764 sppp_cp_send(sp, cp->proto, CODE_REJ, 1765 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1766 ++ifp->if_ierrors; 1767 } 1768 } 1769 1770 1771 /* 1772 * The generic part of all Up/Down/Open/Close/TO event handlers. 1773 * Basically, the state transition handling in the automaton. 1774 */ 1775 static void 1776 sppp_up_event(const struct cp *cp, struct sppp *sp) 1777 { 1778 STDDCL; 1779 1780 if (debug) 1781 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n", 1782 SPP_ARGS(ifp), cp->name, 1783 sppp_state_name(sp->state[cp->protoidx])); 1784 1785 switch (sp->state[cp->protoidx]) { 1786 case STATE_INITIAL: 1787 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1788 break; 1789 case STATE_STARTING: 1790 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1791 (cp->scr)(sp); 1792 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1793 break; 1794 default: 1795 printf(SPP_FMT "%s illegal up in state %s\n", 1796 SPP_ARGS(ifp), cp->name, 1797 sppp_state_name(sp->state[cp->protoidx])); 1798 } 1799 } 1800 1801 static void 1802 sppp_down_event(const struct cp *cp, struct sppp *sp) 1803 { 1804 STDDCL; 1805 1806 if (debug) 1807 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n", 1808 SPP_ARGS(ifp), cp->name, 1809 sppp_state_name(sp->state[cp->protoidx])); 1810 1811 switch (sp->state[cp->protoidx]) { 1812 case STATE_CLOSED: 1813 case STATE_CLOSING: 1814 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1815 break; 1816 case STATE_STOPPED: 1817 (cp->tls)(sp); 1818 /* fall through */ 1819 case STATE_STOPPING: 1820 case STATE_REQ_SENT: 1821 case STATE_ACK_RCVD: 1822 case STATE_ACK_SENT: 1823 sppp_cp_change_state(cp, sp, STATE_STARTING); 1824 break; 1825 case STATE_OPENED: 1826 (cp->tld)(sp); 1827 sppp_cp_change_state(cp, sp, STATE_STARTING); 1828 break; 1829 default: 1830 printf(SPP_FMT "%s illegal down in state %s\n", 1831 SPP_ARGS(ifp), cp->name, 1832 sppp_state_name(sp->state[cp->protoidx])); 1833 } 1834 } 1835 1836 1837 static void 1838 sppp_open_event(const struct cp *cp, struct sppp *sp) 1839 { 1840 STDDCL; 1841 1842 if (debug) 1843 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n", 1844 SPP_ARGS(ifp), cp->name, 1845 sppp_state_name(sp->state[cp->protoidx])); 1846 1847 switch (sp->state[cp->protoidx]) { 1848 case STATE_INITIAL: 1849 (cp->tls)(sp); 1850 sppp_cp_change_state(cp, sp, STATE_STARTING); 1851 break; 1852 case STATE_STARTING: 1853 break; 1854 case STATE_CLOSED: 1855 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1856 (cp->scr)(sp); 1857 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1858 break; 1859 case STATE_STOPPED: 1860 case STATE_STOPPING: 1861 case STATE_REQ_SENT: 1862 case STATE_ACK_RCVD: 1863 case STATE_ACK_SENT: 1864 case STATE_OPENED: 1865 break; 1866 case STATE_CLOSING: 1867 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1868 break; 1869 } 1870 } 1871 1872 1873 static void 1874 sppp_close_event(const struct cp *cp, struct sppp *sp) 1875 { 1876 STDDCL; 1877 1878 if (debug) 1879 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n", 1880 SPP_ARGS(ifp), cp->name, 1881 sppp_state_name(sp->state[cp->protoidx])); 1882 1883 switch (sp->state[cp->protoidx]) { 1884 case STATE_INITIAL: 1885 case STATE_CLOSED: 1886 case STATE_CLOSING: 1887 break; 1888 case STATE_STARTING: 1889 (cp->tlf)(sp); 1890 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1891 break; 1892 case STATE_STOPPED: 1893 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1894 break; 1895 case STATE_STOPPING: 1896 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1897 break; 1898 case STATE_OPENED: 1899 (cp->tld)(sp); 1900 /* fall through */ 1901 case STATE_REQ_SENT: 1902 case STATE_ACK_RCVD: 1903 case STATE_ACK_SENT: 1904 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 1905 sppp_cp_send(sp, cp->proto, TERM_REQ, 1906 ++sp->pp_seq[cp->protoidx], 0, 0); 1907 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1908 break; 1909 } 1910 } 1911 1912 static void 1913 sppp_to_event(const struct cp *cp, struct sppp *sp) 1914 { 1915 STDDCL; 1916 int s; 1917 1918 s = splnet(); 1919 if (debug) 1920 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n", 1921 SPP_ARGS(ifp), cp->name, 1922 sppp_state_name(sp->state[cp->protoidx]), 1923 sp->rst_counter[cp->protoidx]); 1924 1925 if (--sp->rst_counter[cp->protoidx] < 0) 1926 /* TO- event */ 1927 switch (sp->state[cp->protoidx]) { 1928 case STATE_CLOSING: 1929 (cp->tlf)(sp); 1930 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1931 sppp_lcp_check_and_close(sp); 1932 break; 1933 case STATE_STOPPING: 1934 (cp->tlf)(sp); 1935 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1936 sppp_lcp_check_and_close(sp); 1937 break; 1938 case STATE_REQ_SENT: 1939 case STATE_ACK_RCVD: 1940 case STATE_ACK_SENT: 1941 (cp->tlf)(sp); 1942 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1943 sppp_lcp_check_and_close(sp); 1944 break; 1945 } 1946 else 1947 /* TO+ event */ 1948 switch (sp->state[cp->protoidx]) { 1949 case STATE_CLOSING: 1950 case STATE_STOPPING: 1951 sppp_cp_send(sp, cp->proto, TERM_REQ, 1952 ++sp->pp_seq[cp->protoidx], 0, 0); 1953 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1954 cp->TO, sp); 1955 break; 1956 case STATE_REQ_SENT: 1957 case STATE_ACK_RCVD: 1958 (cp->scr)(sp); 1959 /* sppp_cp_change_state() will restart the timer */ 1960 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1961 break; 1962 case STATE_ACK_SENT: 1963 (cp->scr)(sp); 1964 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1965 cp->TO, sp); 1966 break; 1967 } 1968 1969 splx(s); 1970 } 1971 1972 /* 1973 * Change the state of a control protocol in the state automaton. 1974 * Takes care of starting/stopping the restart timer. 1975 */ 1976 void 1977 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 1978 { 1979 sp->state[cp->protoidx] = newstate; 1980 callout_stop(&sp->ch[cp->protoidx]); 1981 switch (newstate) { 1982 case STATE_INITIAL: 1983 case STATE_STARTING: 1984 case STATE_CLOSED: 1985 case STATE_STOPPED: 1986 case STATE_OPENED: 1987 break; 1988 case STATE_CLOSING: 1989 case STATE_STOPPING: 1990 case STATE_REQ_SENT: 1991 case STATE_ACK_RCVD: 1992 case STATE_ACK_SENT: 1993 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1994 cp->TO, sp); 1995 break; 1996 } 1997 } 1998 1999 /* 2000 *--------------------------------------------------------------------------* 2001 * * 2002 * The LCP implementation. * 2003 * * 2004 *--------------------------------------------------------------------------* 2005 */ 2006 static void 2007 sppp_lcp_init(struct sppp *sp) 2008 { 2009 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 2010 sp->lcp.magic = 0; 2011 sp->state[IDX_LCP] = STATE_INITIAL; 2012 sp->fail_counter[IDX_LCP] = 0; 2013 sp->pp_seq[IDX_LCP] = 0; 2014 sp->pp_rseq[IDX_LCP] = 0; 2015 sp->lcp.protos = 0; 2016 sp->lcp.mru = sp->lcp.their_mru = PP_MTU; 2017 2018 /* 2019 * Initialize counters and timeout values. Note that we don't 2020 * use the 3 seconds suggested in RFC 1661 since we are likely 2021 * running on a fast link. XXX We should probably implement 2022 * the exponential backoff option. Note that these values are 2023 * relevant for all control protocols, not just LCP only. 2024 */ 2025 sp->lcp.timeout = 1 * hz; 2026 sp->lcp.max_terminate = 2; 2027 sp->lcp.max_configure = 10; 2028 sp->lcp.max_failure = 10; 2029 callout_init(&sp->ch[IDX_LCP]); 2030 } 2031 2032 static void 2033 sppp_lcp_up(struct sppp *sp) 2034 { 2035 STDDCL; 2036 2037 /* Initialize activity timestamp: opening a connection is an activity */ 2038 sp->pp_last_activity = mono_time.tv_sec; 2039 2040 /* 2041 * If this interface is passive or dial-on-demand, and we are 2042 * still in Initial state, it means we've got an incoming 2043 * call. Activate the interface. 2044 */ 2045 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2046 if (debug) 2047 log(LOG_DEBUG, 2048 SPP_FMT "Up event", SPP_ARGS(ifp)); 2049 ifp->if_flags |= IFF_RUNNING; 2050 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2051 if (debug) 2052 addlog("(incoming call)\n"); 2053 sp->pp_flags |= PP_CALLIN; 2054 lcp.Open(sp); 2055 } else if (debug) 2056 addlog("\n"); 2057 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && 2058 (sp->state[IDX_LCP] == STATE_INITIAL)) { 2059 ifp->if_flags |= IFF_RUNNING; 2060 lcp.Open(sp); 2061 } 2062 2063 sppp_up_event(&lcp, sp); 2064 } 2065 2066 static void 2067 sppp_lcp_down(struct sppp *sp) 2068 { 2069 STDDCL; 2070 2071 sppp_down_event(&lcp, sp); 2072 2073 /* 2074 * If this is neither a dial-on-demand nor a passive 2075 * interface, simulate an ``ifconfig down'' action, so the 2076 * administrator can force a redial by another ``ifconfig 2077 * up''. XXX For leased line operation, should we immediately 2078 * try to reopen the connection here? 2079 */ 2080 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2081 if (debug) 2082 log(LOG_INFO, 2083 SPP_FMT "Down event (carrier loss), taking interface down.\n", 2084 SPP_ARGS(ifp)); 2085 if_down(ifp); 2086 } else { 2087 if (debug) 2088 log(LOG_DEBUG, 2089 SPP_FMT "Down event (carrier loss)\n", 2090 SPP_ARGS(ifp)); 2091 } 2092 sp->pp_flags &= ~PP_CALLIN; 2093 if (sp->state[IDX_LCP] != STATE_INITIAL) 2094 lcp.Close(sp); 2095 ifp->if_flags &= ~IFF_RUNNING; 2096 } 2097 2098 static void 2099 sppp_lcp_open(struct sppp *sp) 2100 { 2101 /* 2102 * If we are authenticator, negotiate LCP_AUTH 2103 */ 2104 if (sp->hisauth.proto != 0) 2105 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2106 else 2107 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2108 sp->pp_flags &= ~PP_NEEDAUTH; 2109 sppp_open_event(&lcp, sp); 2110 } 2111 2112 static void 2113 sppp_lcp_close(struct sppp *sp) 2114 { 2115 sppp_close_event(&lcp, sp); 2116 } 2117 2118 static void 2119 sppp_lcp_TO(void *cookie) 2120 { 2121 sppp_to_event(&lcp, (struct sppp *)cookie); 2122 } 2123 2124 /* 2125 * Analyze a configure request. Return true if it was agreeable, and 2126 * caused action sca, false if it has been rejected or nak'ed, and 2127 * caused action scn. (The return value is used to make the state 2128 * transition decision in the state automaton.) 2129 */ 2130 static int 2131 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2132 { 2133 STDDCL; 2134 u_char *buf, *r, *p; 2135 int origlen, rlen; 2136 u_int32_t nmagic; 2137 u_short authproto; 2138 2139 len -= 4; 2140 origlen = len; 2141 buf = r = malloc (len, M_TEMP, M_NOWAIT); 2142 if (! buf) 2143 return (0); 2144 2145 if (debug) 2146 log(LOG_DEBUG, SPP_FMT "lcp parse opts:", 2147 SPP_ARGS(ifp)); 2148 2149 /* pass 1: check for things that need to be rejected */ 2150 p = (void*) (h+1); 2151 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2152 if (debug) 2153 addlog(" %s", sppp_lcp_opt_name(*p)); 2154 switch (*p) { 2155 case LCP_OPT_MAGIC: 2156 /* Magic number. */ 2157 /* fall through, both are same length */ 2158 case LCP_OPT_ASYNC_MAP: 2159 /* Async control character map. */ 2160 if (len >= 6 || p[1] == 6) 2161 continue; 2162 if (debug) 2163 addlog(" [invalid]"); 2164 break; 2165 case LCP_OPT_MRU: 2166 /* Maximum receive unit. */ 2167 if (len >= 4 && p[1] == 4) 2168 continue; 2169 if (debug) 2170 addlog(" [invalid]"); 2171 break; 2172 case LCP_OPT_AUTH_PROTO: 2173 if (len < 4) { 2174 if (debug) 2175 addlog(" [invalid]"); 2176 break; 2177 } 2178 authproto = (p[2] << 8) + p[3]; 2179 if (authproto == PPP_CHAP && p[1] != 5) { 2180 if (debug) 2181 addlog(" [invalid chap len]"); 2182 break; 2183 } 2184 if (sp->myauth.proto == 0) { 2185 /* we are not configured to do auth */ 2186 if (debug) 2187 addlog(" [not configured]"); 2188 break; 2189 } 2190 /* 2191 * Remote want us to authenticate, remember this, 2192 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2193 * up. 2194 */ 2195 sp->pp_flags |= PP_NEEDAUTH; 2196 continue; 2197 default: 2198 /* Others not supported. */ 2199 if (debug) 2200 addlog(" [rej]"); 2201 break; 2202 } 2203 /* Add the option to rejected list. */ 2204 bcopy (p, r, p[1]); 2205 r += p[1]; 2206 rlen += p[1]; 2207 } 2208 if (rlen) { 2209 if (debug) 2210 addlog(" send conf-rej\n"); 2211 sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2212 goto end; 2213 } else if (debug) 2214 addlog("\n"); 2215 2216 /* 2217 * pass 2: check for option values that are unacceptable and 2218 * thus require to be nak'ed. 2219 */ 2220 if (debug) 2221 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ", 2222 SPP_ARGS(ifp)); 2223 2224 p = (void*) (h+1); 2225 len = origlen; 2226 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2227 if (debug) 2228 addlog(" %s", sppp_lcp_opt_name(*p)); 2229 switch (*p) { 2230 case LCP_OPT_MAGIC: 2231 /* Magic number -- extract. */ 2232 nmagic = (u_int32_t)p[2] << 24 | 2233 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2234 if (nmagic != sp->lcp.magic) { 2235 if (debug) 2236 addlog(" 0x%x", nmagic); 2237 continue; 2238 } 2239 /* 2240 * Local and remote magics equal -- loopback? 2241 */ 2242 if (sp->pp_loopcnt >= MAXALIVECNT*5) { 2243 printf (SPP_FMT "loopback\n", 2244 SPP_ARGS(ifp)); 2245 sp->pp_loopcnt = 0; 2246 if (ifp->if_flags & IFF_UP) { 2247 if_down(ifp); 2248 IF_PURGE(&sp->pp_cpq); 2249 /* XXX ? */ 2250 lcp.Down(sp); 2251 lcp.Up(sp); 2252 } 2253 } else if (debug) 2254 addlog(" [glitch]"); 2255 ++sp->pp_loopcnt; 2256 /* 2257 * We negate our magic here, and NAK it. If 2258 * we see it later in an NAK packet, we 2259 * suggest a new one. 2260 */ 2261 nmagic = ~sp->lcp.magic; 2262 /* Gonna NAK it. */ 2263 p[2] = nmagic >> 24; 2264 p[3] = nmagic >> 16; 2265 p[4] = nmagic >> 8; 2266 p[5] = nmagic; 2267 break; 2268 2269 case LCP_OPT_ASYNC_MAP: 2270 /* Async control character map -- check to be zero. */ 2271 if (! p[2] && ! p[3] && ! p[4] && ! p[5]) { 2272 if (debug) 2273 addlog(" [empty]"); 2274 continue; 2275 } 2276 if (debug) 2277 addlog(" [non-empty]"); 2278 /* suggest a zero one */ 2279 p[2] = p[3] = p[4] = p[5] = 0; 2280 break; 2281 2282 case LCP_OPT_MRU: 2283 /* 2284 * Maximum receive unit. Always agreeable, 2285 * but ignored by now. 2286 */ 2287 sp->lcp.their_mru = p[2] * 256 + p[3]; 2288 if (debug) 2289 addlog(" %ld", sp->lcp.their_mru); 2290 continue; 2291 2292 case LCP_OPT_AUTH_PROTO: 2293 authproto = (p[2] << 8) + p[3]; 2294 if (sp->myauth.proto != authproto) { 2295 /* not agreed, nak */ 2296 if (debug) 2297 addlog(" [mine %s != his %s]", 2298 sppp_proto_name(sp->hisauth.proto), 2299 sppp_proto_name(authproto)); 2300 p[2] = sp->myauth.proto >> 8; 2301 p[3] = sp->myauth.proto; 2302 break; 2303 } 2304 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2305 if (debug) 2306 addlog(" [chap not MD5]"); 2307 p[4] = CHAP_MD5; 2308 break; 2309 } 2310 continue; 2311 } 2312 /* Add the option to nak'ed list. */ 2313 bcopy (p, r, p[1]); 2314 r += p[1]; 2315 rlen += p[1]; 2316 } 2317 if (rlen) { 2318 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2319 if (debug) 2320 addlog(" max_failure (%d) exceeded, " 2321 "send conf-rej\n", 2322 sp->lcp.max_failure); 2323 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2324 } else { 2325 if (debug) 2326 addlog(" send conf-nak\n"); 2327 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2328 } 2329 goto end; 2330 } else { 2331 if (debug) 2332 addlog(" send conf-ack\n"); 2333 sp->fail_counter[IDX_LCP] = 0; 2334 sp->pp_loopcnt = 0; 2335 sppp_cp_send (sp, PPP_LCP, CONF_ACK, 2336 h->ident, origlen, h+1); 2337 } 2338 2339 end: 2340 free (buf, M_TEMP); 2341 return (rlen == 0); 2342 } 2343 2344 /* 2345 * Analyze the LCP Configure-Reject option list, and adjust our 2346 * negotiation. 2347 */ 2348 static void 2349 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2350 { 2351 STDDCL; 2352 u_char *buf, *p; 2353 2354 len -= 4; 2355 buf = malloc (len, M_TEMP, M_NOWAIT); 2356 if (!buf) 2357 return; 2358 2359 if (debug) 2360 log(LOG_DEBUG, SPP_FMT "lcp rej opts:", 2361 SPP_ARGS(ifp)); 2362 2363 p = (void*) (h+1); 2364 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2365 if (debug) 2366 addlog(" %s", sppp_lcp_opt_name(*p)); 2367 switch (*p) { 2368 case LCP_OPT_MAGIC: 2369 /* Magic number -- can't use it, use 0 */ 2370 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2371 sp->lcp.magic = 0; 2372 break; 2373 case LCP_OPT_MRU: 2374 /* 2375 * Should not be rejected anyway, since we only 2376 * negotiate a MRU if explicitly requested by 2377 * peer. 2378 */ 2379 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2380 break; 2381 case LCP_OPT_AUTH_PROTO: 2382 /* 2383 * Peer doesn't want to authenticate himself, 2384 * deny unless this is a dialout call, and 2385 * SPPP_AUTHFLAG_NOCALLOUT is set. 2386 */ 2387 if ((sp->pp_flags & PP_CALLIN) == 0 && 2388 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2389 if (debug) 2390 addlog(" [don't insist on auth " 2391 "for callout]"); 2392 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2393 break; 2394 } 2395 if (debug) 2396 addlog("[access denied]\n"); 2397 lcp.Close(sp); 2398 break; 2399 } 2400 } 2401 if (debug) 2402 addlog("\n"); 2403 free (buf, M_TEMP); 2404 return; 2405 } 2406 2407 /* 2408 * Analyze the LCP Configure-NAK option list, and adjust our 2409 * negotiation. 2410 */ 2411 static void 2412 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2413 { 2414 STDDCL; 2415 u_char *buf, *p; 2416 u_int32_t magic; 2417 2418 len -= 4; 2419 buf = malloc (len, M_TEMP, M_NOWAIT); 2420 if (!buf) 2421 return; 2422 2423 if (debug) 2424 log(LOG_DEBUG, SPP_FMT "lcp nak opts:", 2425 SPP_ARGS(ifp)); 2426 2427 p = (void*) (h+1); 2428 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2429 if (debug) 2430 addlog(" %s", sppp_lcp_opt_name(*p)); 2431 switch (*p) { 2432 case LCP_OPT_MAGIC: 2433 /* Magic number -- renegotiate */ 2434 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2435 len >= 6 && p[1] == 6) { 2436 magic = (u_int32_t)p[2] << 24 | 2437 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2438 /* 2439 * If the remote magic is our negated one, 2440 * this looks like a loopback problem. 2441 * Suggest a new magic to make sure. 2442 */ 2443 if (magic == ~sp->lcp.magic) { 2444 if (debug) 2445 addlog(" magic glitch"); 2446 sp->lcp.magic = random(); 2447 } else { 2448 sp->lcp.magic = magic; 2449 if (debug) 2450 addlog(" %d", magic); 2451 } 2452 } 2453 break; 2454 case LCP_OPT_MRU: 2455 /* 2456 * Peer wants to advise us to negotiate an MRU. 2457 * Agree on it if it's reasonable, or use 2458 * default otherwise. 2459 */ 2460 if (len >= 4 && p[1] == 4) { 2461 u_int mru = p[2] * 256 + p[3]; 2462 if (debug) 2463 addlog(" %d", mru); 2464 if (mru < PP_MTU || mru > PP_MAX_MRU) 2465 mru = PP_MTU; 2466 sp->lcp.mru = mru; 2467 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2468 } 2469 break; 2470 case LCP_OPT_AUTH_PROTO: 2471 /* 2472 * Peer doesn't like our authentication method, 2473 * deny. 2474 */ 2475 if (debug) 2476 addlog("[access denied]\n"); 2477 lcp.Close(sp); 2478 break; 2479 } 2480 } 2481 if (debug) 2482 addlog("\n"); 2483 free (buf, M_TEMP); 2484 return; 2485 } 2486 2487 static void 2488 sppp_lcp_tlu(struct sppp *sp) 2489 { 2490 STDDCL; 2491 int i; 2492 u_int32_t mask; 2493 2494 /* XXX ? */ 2495 if (! (ifp->if_flags & IFF_UP) && 2496 (ifp->if_flags & IFF_RUNNING)) { 2497 /* Coming out of loopback mode. */ 2498 if_up(ifp); 2499 } 2500 2501 for (i = 0; i < IDX_COUNT; i++) 2502 if ((cps[i])->flags & CP_QUAL) 2503 (cps[i])->Open(sp); 2504 2505 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2506 (sp->pp_flags & PP_NEEDAUTH) != 0) 2507 sp->pp_phase = SPPP_PHASE_AUTHENTICATE; 2508 else 2509 sp->pp_phase = SPPP_PHASE_NETWORK; 2510 2511 if(debug) 2512 { 2513 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2514 sppp_phase_name(sp->pp_phase)); 2515 } 2516 2517 /* 2518 * Open all authentication protocols. This is even required 2519 * if we already proceeded to network phase, since it might be 2520 * that remote wants us to authenticate, so we might have to 2521 * send a PAP request. Undesired authentication protocols 2522 * don't do anything when they get an Open event. 2523 */ 2524 for (i = 0; i < IDX_COUNT; i++) 2525 if ((cps[i])->flags & CP_AUTH) 2526 (cps[i])->Open(sp); 2527 2528 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2529 /* Notify all NCPs. */ 2530 for (i = 0; i < IDX_COUNT; i++) 2531 if ((cps[i])->flags & CP_NCP) 2532 (cps[i])->Open(sp); 2533 } 2534 2535 /* Send Up events to all started protos. */ 2536 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2537 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) 2538 (cps[i])->Up(sp); 2539 2540 /* notify low-level driver of state change */ 2541 if (sp->pp_chg) 2542 sp->pp_chg(sp, (int)sp->pp_phase); 2543 2544 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2545 /* if no NCP is starting, close down */ 2546 sppp_lcp_check_and_close(sp); 2547 } 2548 2549 static void 2550 sppp_lcp_tld(struct sppp *sp) 2551 { 2552 STDDCL; 2553 int i; 2554 u_int32_t mask; 2555 2556 sp->pp_phase = SPPP_PHASE_TERMINATE; 2557 2558 if(debug) 2559 { 2560 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2561 sppp_phase_name(sp->pp_phase)); 2562 } 2563 2564 /* 2565 * Take upper layers down. We send the Down event first and 2566 * the Close second to prevent the upper layers from sending 2567 * ``a flurry of terminate-request packets'', as the RFC 2568 * describes it. 2569 */ 2570 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2571 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2572 (cps[i])->Down(sp); 2573 (cps[i])->Close(sp); 2574 } 2575 } 2576 2577 static void 2578 sppp_lcp_tls(struct sppp *sp) 2579 { 2580 STDDCL; 2581 2582 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2583 printf("%s: authentication failed %d times, not retrying again\n", 2584 sp->pp_if.if_xname, sp->pp_auth_failures); 2585 if_down(&sp->pp_if); 2586 return; 2587 } 2588 2589 sp->pp_phase = SPPP_PHASE_ESTABLISH; 2590 2591 if(debug) 2592 { 2593 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2594 sppp_phase_name(sp->pp_phase)); 2595 } 2596 2597 /* Notify lower layer if desired. */ 2598 if (sp->pp_tls) 2599 (sp->pp_tls)(sp); 2600 } 2601 2602 static void 2603 sppp_lcp_tlf(struct sppp *sp) 2604 { 2605 STDDCL; 2606 2607 sp->pp_phase = SPPP_PHASE_DEAD; 2608 2609 if(debug) 2610 { 2611 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2612 sppp_phase_name(sp->pp_phase)); 2613 } 2614 2615 /* Notify lower layer if desired. */ 2616 if (sp->pp_tlf) 2617 (sp->pp_tlf)(sp); 2618 } 2619 2620 static void 2621 sppp_lcp_scr(struct sppp *sp) 2622 { 2623 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2624 int i = 0; 2625 u_short authproto; 2626 2627 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2628 if (! sp->lcp.magic) 2629 sp->lcp.magic = random(); 2630 opt[i++] = LCP_OPT_MAGIC; 2631 opt[i++] = 6; 2632 opt[i++] = sp->lcp.magic >> 24; 2633 opt[i++] = sp->lcp.magic >> 16; 2634 opt[i++] = sp->lcp.magic >> 8; 2635 opt[i++] = sp->lcp.magic; 2636 } 2637 2638 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2639 opt[i++] = LCP_OPT_MRU; 2640 opt[i++] = 4; 2641 opt[i++] = sp->lcp.mru >> 8; 2642 opt[i++] = sp->lcp.mru; 2643 } 2644 2645 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2646 authproto = sp->hisauth.proto; 2647 opt[i++] = LCP_OPT_AUTH_PROTO; 2648 opt[i++] = authproto == PPP_CHAP? 5: 4; 2649 opt[i++] = authproto >> 8; 2650 opt[i++] = authproto; 2651 if (authproto == PPP_CHAP) 2652 opt[i++] = CHAP_MD5; 2653 } 2654 2655 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2656 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2657 } 2658 2659 /* 2660 * Check the open NCPs, return true if at least one NCP is open. 2661 */ 2662 static int 2663 sppp_ncp_check(struct sppp *sp) 2664 { 2665 int i, mask; 2666 2667 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2668 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2669 return 1; 2670 return 0; 2671 } 2672 2673 /* 2674 * Re-check the open NCPs and see if we should terminate the link. 2675 * Called by the NCPs during their tlf action handling. 2676 */ 2677 static void 2678 sppp_lcp_check_and_close(struct sppp *sp) 2679 { 2680 2681 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2682 /* don't bother, we are already going down */ 2683 return; 2684 2685 if (sppp_ncp_check(sp)) 2686 return; 2687 2688 lcp.Close(sp); 2689 } 2690 2691 2692 /* 2693 *--------------------------------------------------------------------------* 2694 * * 2695 * The IPCP implementation. * 2696 * * 2697 *--------------------------------------------------------------------------* 2698 */ 2699 2700 static void 2701 sppp_ipcp_init(struct sppp *sp) 2702 { 2703 sp->ipcp.opts = 0; 2704 sp->ipcp.flags = 0; 2705 sp->state[IDX_IPCP] = STATE_INITIAL; 2706 sp->fail_counter[IDX_IPCP] = 0; 2707 sp->pp_seq[IDX_IPCP] = 0; 2708 sp->pp_rseq[IDX_IPCP] = 0; 2709 callout_init(&sp->ch[IDX_IPCP]); 2710 } 2711 2712 static void 2713 sppp_ipcp_up(struct sppp *sp) 2714 { 2715 sppp_up_event(&ipcp, sp); 2716 } 2717 2718 static void 2719 sppp_ipcp_down(struct sppp *sp) 2720 { 2721 sppp_down_event(&ipcp, sp); 2722 } 2723 2724 static void 2725 sppp_ipcp_open(struct sppp *sp) 2726 { 2727 STDDCL; 2728 u_int32_t myaddr, hisaddr; 2729 2730 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 2731 sp->ipcp.req_myaddr = 0; 2732 sp->ipcp.req_hisaddr = 0; 2733 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 2734 2735 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 2736 /* 2737 * If we don't have his address, this probably means our 2738 * interface doesn't want to talk IP at all. (This could 2739 * be the case if somebody wants to speak only IPX, for 2740 * example.) Don't open IPCP in this case. 2741 */ 2742 if (hisaddr == 0L) { 2743 /* XXX this message should go away */ 2744 if (debug) 2745 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n", 2746 SPP_ARGS(ifp)); 2747 return; 2748 } 2749 2750 if (myaddr == 0) { 2751 /* 2752 * I don't have an assigned address, so i need to 2753 * negotiate my address. 2754 */ 2755 sp->ipcp.flags |= IPCP_MYADDR_DYN; 2756 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2757 } 2758 if (hisaddr == 1) { 2759 /* 2760 * XXX - remove this hack! 2761 * remote has no valid adress, we need to get one assigned. 2762 */ 2763 sp->ipcp.flags |= IPCP_HISADDR_DYN; 2764 } 2765 sppp_open_event(&ipcp, sp); 2766 } 2767 2768 static void 2769 sppp_ipcp_close(struct sppp *sp) 2770 { 2771 sppp_close_event(&ipcp, sp); 2772 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 2773 /* 2774 * Some address was dynamic, clear it again. 2775 */ 2776 sppp_clear_ip_addrs(sp); 2777 } 2778 2779 static void 2780 sppp_ipcp_TO(void *cookie) 2781 { 2782 sppp_to_event(&ipcp, (struct sppp *)cookie); 2783 } 2784 2785 /* 2786 * Analyze a configure request. Return true if it was agreeable, and 2787 * caused action sca, false if it has been rejected or nak'ed, and 2788 * caused action scn. (The return value is used to make the state 2789 * transition decision in the state automaton.) 2790 */ 2791 static int 2792 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2793 { 2794 u_char *buf, *r, *p; 2795 struct ifnet *ifp = &sp->pp_if; 2796 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 2797 u_int32_t hisaddr, desiredaddr; 2798 2799 len -= 4; 2800 origlen = len; 2801 /* 2802 * Make sure to allocate a buf that can at least hold a 2803 * conf-nak with an `address' option. We might need it below. 2804 */ 2805 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 2806 if (! buf) 2807 return (0); 2808 2809 /* pass 1: see if we can recognize them */ 2810 if (debug) 2811 log(LOG_DEBUG, SPP_FMT "ipcp parse opts:", 2812 SPP_ARGS(ifp)); 2813 p = (void*) (h+1); 2814 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2815 if (debug) 2816 addlog(" %s", sppp_ipcp_opt_name(*p)); 2817 switch (*p) { 2818 #ifdef notyet 2819 case IPCP_OPT_COMPRESSION: 2820 if (len >= 6 && p[1] >= 6) { 2821 /* correctly formed compress option */ 2822 continue; 2823 } 2824 if (debug) 2825 addlog(" [invalid]"); 2826 break; 2827 #endif 2828 case IPCP_OPT_ADDRESS: 2829 if (len >= 6 && p[1] == 6) { 2830 /* correctly formed address option */ 2831 continue; 2832 } 2833 if (debug) 2834 addlog(" [invalid]"); 2835 break; 2836 default: 2837 /* Others not supported. */ 2838 if (debug) 2839 addlog(" [rej]"); 2840 break; 2841 } 2842 /* Add the option to rejected list. */ 2843 bcopy (p, r, p[1]); 2844 r += p[1]; 2845 rlen += p[1]; 2846 } 2847 if (rlen) { 2848 if (debug) 2849 addlog(" send conf-rej\n"); 2850 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 2851 goto end; 2852 } else if (debug) 2853 addlog("\n"); 2854 2855 /* pass 2: parse option values */ 2856 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 2857 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 2858 else 2859 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 2860 if (debug) 2861 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ", 2862 SPP_ARGS(ifp)); 2863 p = (void*) (h+1); 2864 len = origlen; 2865 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2866 if (debug) 2867 addlog(" %s", sppp_ipcp_opt_name(*p)); 2868 switch (*p) { 2869 #ifdef notyet 2870 case IPCP_OPT_COMPRESSION: 2871 continue; 2872 #endif 2873 case IPCP_OPT_ADDRESS: 2874 desiredaddr = p[2] << 24 | p[3] << 16 | 2875 p[4] << 8 | p[5]; 2876 if (desiredaddr == hisaddr || 2877 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 2878 /* 2879 * Peer's address is same as our value, 2880 * this is agreeable. Gonna conf-ack 2881 * it. 2882 */ 2883 if (debug) 2884 addlog(" %s [ack]", 2885 sppp_dotted_quad(hisaddr)); 2886 /* record that we've seen it already */ 2887 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 2888 sp->ipcp.req_hisaddr = desiredaddr; 2889 hisaddr = desiredaddr; 2890 continue; 2891 } 2892 /* 2893 * The address wasn't agreeable. This is either 2894 * he sent us 0.0.0.0, asking to assign him an 2895 * address, or he send us another address not 2896 * matching our value. Either case, we gonna 2897 * conf-nak it with our value. 2898 */ 2899 if (debug) { 2900 if (desiredaddr == 0) 2901 addlog(" [addr requested]"); 2902 else 2903 addlog(" %s [not agreed]", 2904 sppp_dotted_quad(desiredaddr)); 2905 } 2906 2907 p[2] = hisaddr >> 24; 2908 p[3] = hisaddr >> 16; 2909 p[4] = hisaddr >> 8; 2910 p[5] = hisaddr; 2911 break; 2912 } 2913 /* Add the option to nak'ed list. */ 2914 bcopy (p, r, p[1]); 2915 r += p[1]; 2916 rlen += p[1]; 2917 } 2918 2919 /* 2920 * If we are about to conf-ack the request, but haven't seen 2921 * his address so far, gonna conf-nak it instead, with the 2922 * `address' option present and our idea of his address being 2923 * filled in there, to request negotiation of both addresses. 2924 * 2925 * XXX This can result in an endless req - nak loop if peer 2926 * doesn't want to send us his address. Q: What should we do 2927 * about it? XXX A: implement the max-failure counter. 2928 */ 2929 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 2930 buf[0] = IPCP_OPT_ADDRESS; 2931 buf[1] = 6; 2932 buf[2] = hisaddr >> 24; 2933 buf[3] = hisaddr >> 16; 2934 buf[4] = hisaddr >> 8; 2935 buf[5] = hisaddr; 2936 rlen = 6; 2937 if (debug) 2938 addlog(" still need hisaddr"); 2939 } 2940 2941 if (rlen) { 2942 if (debug) 2943 addlog(" send conf-nak\n"); 2944 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 2945 } else { 2946 if (debug) 2947 addlog(" send conf-ack\n"); 2948 sppp_cp_send (sp, PPP_IPCP, CONF_ACK, 2949 h->ident, origlen, h+1); 2950 } 2951 2952 end: 2953 free (buf, M_TEMP); 2954 return (rlen == 0); 2955 } 2956 2957 /* 2958 * Analyze the IPCP Configure-Reject option list, and adjust our 2959 * negotiation. 2960 */ 2961 static void 2962 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2963 { 2964 u_char *buf, *p; 2965 struct ifnet *ifp = &sp->pp_if; 2966 int debug = ifp->if_flags & IFF_DEBUG; 2967 2968 len -= 4; 2969 buf = malloc (len, M_TEMP, M_NOWAIT); 2970 if (!buf) 2971 return; 2972 2973 if (debug) 2974 log(LOG_DEBUG, SPP_FMT "ipcp rej opts:", 2975 SPP_ARGS(ifp)); 2976 2977 p = (void*) (h+1); 2978 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2979 if (debug) 2980 addlog(" %s", sppp_ipcp_opt_name(*p)); 2981 switch (*p) { 2982 case IPCP_OPT_ADDRESS: 2983 /* 2984 * Peer doesn't grok address option. This is 2985 * bad. XXX Should we better give up here? 2986 */ 2987 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 2988 break; 2989 #ifdef notyet 2990 case IPCP_OPT_COMPRESS: 2991 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 2992 break; 2993 #endif 2994 } 2995 } 2996 if (debug) 2997 addlog("\n"); 2998 free (buf, M_TEMP); 2999 return; 3000 } 3001 3002 /* 3003 * Analyze the IPCP Configure-NAK option list, and adjust our 3004 * negotiation. 3005 */ 3006 static void 3007 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3008 { 3009 u_char *p; 3010 struct ifnet *ifp = &sp->pp_if; 3011 int debug = ifp->if_flags & IFF_DEBUG; 3012 u_int32_t wantaddr; 3013 3014 len -= 4; 3015 3016 if (debug) 3017 log(LOG_DEBUG, SPP_FMT "ipcp nak opts:", 3018 SPP_ARGS(ifp)); 3019 3020 p = (void*) (h+1); 3021 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3022 if (debug) 3023 addlog(" %s", sppp_ipcp_opt_name(*p)); 3024 switch (*p) { 3025 case IPCP_OPT_ADDRESS: 3026 /* 3027 * Peer doesn't like our local IP address. See 3028 * if we can do something for him. We'll drop 3029 * him our address then. 3030 */ 3031 if (len >= 6 && p[1] == 6) { 3032 wantaddr = p[2] << 24 | p[3] << 16 | 3033 p[4] << 8 | p[5]; 3034 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3035 if (debug) 3036 addlog(" [wantaddr %s]", 3037 sppp_dotted_quad(wantaddr)); 3038 /* 3039 * When doing dynamic address assignment, 3040 * we accept his offer. Otherwise, we 3041 * ignore it and thus continue to negotiate 3042 * our already existing value. 3043 */ 3044 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3045 if (debug) 3046 addlog(" [agree]"); 3047 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3048 sp->ipcp.req_myaddr = wantaddr; 3049 } 3050 } 3051 break; 3052 3053 case IPCP_OPT_PRIMDNS: 3054 if (len >= 6 && p[1] == 6) { 3055 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3056 p[4] << 8 | p[5]; 3057 } 3058 break; 3059 3060 case IPCP_OPT_SECDNS: 3061 if (len >= 6 && p[1] == 6) { 3062 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3063 p[4] << 8 | p[5]; 3064 } 3065 break; 3066 #ifdef notyet 3067 case IPCP_OPT_COMPRESS: 3068 /* 3069 * Peer wants different compression parameters. 3070 */ 3071 break; 3072 #endif 3073 } 3074 } 3075 if (debug) 3076 addlog("\n"); 3077 return; 3078 } 3079 3080 static void 3081 sppp_ipcp_tlu(struct sppp *sp) 3082 { 3083 /* we are up. Set addresses and notify anyone interested */ 3084 u_int32_t myaddr, hisaddr; 3085 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3086 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 3087 myaddr = sp->ipcp.req_myaddr; 3088 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 3089 hisaddr = sp->ipcp.req_hisaddr; 3090 sppp_set_ip_addrs(sp, myaddr, hisaddr); 3091 if (sp->pp_con) 3092 sp->pp_con(sp); 3093 } 3094 3095 static void 3096 sppp_ipcp_tld(struct sppp *sp) 3097 { 3098 } 3099 3100 static void 3101 sppp_ipcp_tls(struct sppp *sp) 3102 { 3103 /* indicate to LCP that it must stay alive */ 3104 sp->lcp.protos |= (1 << IDX_IPCP); 3105 } 3106 3107 static void 3108 sppp_ipcp_tlf(struct sppp *sp) 3109 { 3110 /* we no longer need LCP */ 3111 sp->lcp.protos &= ~(1 << IDX_IPCP); 3112 } 3113 3114 static void 3115 sppp_ipcp_scr(struct sppp *sp) 3116 { 3117 char opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3118 u_int32_t ouraddr; 3119 int i = 0; 3120 3121 #ifdef notyet 3122 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3123 opt[i++] = IPCP_OPT_COMPRESSION; 3124 opt[i++] = 6; 3125 opt[i++] = 0; /* VJ header compression */ 3126 opt[i++] = 0x2d; /* VJ header compression */ 3127 opt[i++] = max_slot_id; 3128 opt[i++] = comp_slot_id; 3129 } 3130 #endif 3131 3132 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3133 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3134 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3135 else 3136 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3137 opt[i++] = IPCP_OPT_ADDRESS; 3138 opt[i++] = 6; 3139 opt[i++] = ouraddr >> 24; 3140 opt[i++] = ouraddr >> 16; 3141 opt[i++] = ouraddr >> 8; 3142 opt[i++] = ouraddr; 3143 } 3144 3145 if (sp->query_dns & 1) { 3146 opt[i++] = IPCP_OPT_PRIMDNS; 3147 opt[i++] = 6; 3148 opt[i++] = sp->dns_addrs[0] >> 24; 3149 opt[i++] = sp->dns_addrs[0] >> 16; 3150 opt[i++] = sp->dns_addrs[0] >> 8; 3151 opt[i++] = sp->dns_addrs[0]; 3152 } 3153 if (sp->query_dns & 2) { 3154 opt[i++] = IPCP_OPT_SECDNS; 3155 opt[i++] = 6; 3156 opt[i++] = sp->dns_addrs[1] >> 24; 3157 opt[i++] = sp->dns_addrs[1] >> 16; 3158 opt[i++] = sp->dns_addrs[1] >> 8; 3159 opt[i++] = sp->dns_addrs[1]; 3160 } 3161 3162 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3163 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3164 } 3165 3166 3167 /* 3168 *--------------------------------------------------------------------------* 3169 * * 3170 * The IPv6CP implementation. * 3171 * * 3172 *--------------------------------------------------------------------------* 3173 */ 3174 3175 #ifdef INET6 3176 static void 3177 sppp_ipv6cp_init(struct sppp *sp) 3178 { 3179 sp->ipv6cp.opts = 0; 3180 sp->ipv6cp.flags = 0; 3181 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3182 sp->fail_counter[IDX_IPV6CP] = 0; 3183 sp->pp_seq[IDX_IPV6CP] = 0; 3184 sp->pp_rseq[IDX_IPV6CP] = 0; 3185 callout_init(&sp->ch[IDX_IPV6CP]); 3186 } 3187 3188 static void 3189 sppp_ipv6cp_up(struct sppp *sp) 3190 { 3191 sppp_up_event(&ipv6cp, sp); 3192 } 3193 3194 static void 3195 sppp_ipv6cp_down(struct sppp *sp) 3196 { 3197 sppp_down_event(&ipv6cp, sp); 3198 } 3199 3200 static void 3201 sppp_ipv6cp_open(struct sppp *sp) 3202 { 3203 STDDCL; 3204 struct in6_addr myaddr, hisaddr; 3205 3206 #ifdef IPV6CP_MYIFID_DYN 3207 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3208 #else 3209 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3210 #endif 3211 3212 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3213 /* 3214 * If we don't have our address, this probably means our 3215 * interface doesn't want to talk IPv6 at all. (This could 3216 * be the case if somebody wants to speak only IPX, for 3217 * example.) Don't open IPv6CP in this case. 3218 */ 3219 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3220 /* XXX this message should go away */ 3221 if (debug) 3222 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n", 3223 SPP_ARGS(ifp)); 3224 return; 3225 } 3226 3227 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3228 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3229 sppp_open_event(&ipv6cp, sp); 3230 } 3231 3232 static void 3233 sppp_ipv6cp_close(struct sppp *sp) 3234 { 3235 sppp_close_event(&ipv6cp, sp); 3236 } 3237 3238 static void 3239 sppp_ipv6cp_TO(void *cookie) 3240 { 3241 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3242 } 3243 3244 /* 3245 * Analyze a configure request. Return true if it was agreeable, and 3246 * caused action sca, false if it has been rejected or nak'ed, and 3247 * caused action scn. (The return value is used to make the state 3248 * transition decision in the state automaton.) 3249 */ 3250 static int 3251 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3252 { 3253 u_char *buf, *r, *p; 3254 struct ifnet *ifp = &sp->pp_if; 3255 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3256 struct in6_addr myaddr, desiredaddr, suggestaddr; 3257 int ifidcount; 3258 int type; 3259 int collision, nohisaddr; 3260 3261 len -= 4; 3262 origlen = len; 3263 /* 3264 * Make sure to allocate a buf that can at least hold a 3265 * conf-nak with an `address' option. We might need it below. 3266 */ 3267 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 3268 if (! buf) 3269 return (0); 3270 3271 /* pass 1: see if we can recognize them */ 3272 if (debug) 3273 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:", 3274 SPP_ARGS(ifp)); 3275 p = (void*) (h+1); 3276 ifidcount = 0; 3277 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3278 if (debug) 3279 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3280 switch (*p) { 3281 case IPV6CP_OPT_IFID: 3282 if (len >= 10 && p[1] == 10 && ifidcount == 0) { 3283 /* correctly formed address option */ 3284 ifidcount++; 3285 continue; 3286 } 3287 if (debug) 3288 addlog(" [invalid]"); 3289 break; 3290 #ifdef notyet 3291 case IPV6CP_OPT_COMPRESSION: 3292 if (len >= 4 && p[1] >= 4) { 3293 /* correctly formed compress option */ 3294 continue; 3295 } 3296 if (debug) 3297 addlog(" [invalid]"); 3298 break; 3299 #endif 3300 default: 3301 /* Others not supported. */ 3302 if (debug) 3303 addlog(" [rej]"); 3304 break; 3305 } 3306 /* Add the option to rejected list. */ 3307 bcopy (p, r, p[1]); 3308 r += p[1]; 3309 rlen += p[1]; 3310 } 3311 if (rlen) { 3312 if (debug) 3313 addlog(" send conf-rej\n"); 3314 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3315 goto end; 3316 } else if (debug) 3317 addlog("\n"); 3318 3319 /* pass 2: parse option values */ 3320 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3321 if (debug) 3322 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ", 3323 SPP_ARGS(ifp)); 3324 p = (void*) (h+1); 3325 len = origlen; 3326 type = CONF_ACK; 3327 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3328 if (debug) 3329 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3330 switch (*p) { 3331 #ifdef notyet 3332 case IPV6CP_OPT_COMPRESSION: 3333 continue; 3334 #endif 3335 case IPV6CP_OPT_IFID: 3336 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3337 bcopy(&p[2], &desiredaddr.s6_addr[8], 8); 3338 collision = (memcmp(&desiredaddr.s6_addr[8], 3339 &myaddr.s6_addr[8], 8) == 0); 3340 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3341 3342 desiredaddr.s6_addr16[0] = htons(0xfe80); 3343 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3344 3345 if (!collision && !nohisaddr) { 3346 /* no collision, hisaddr known - Conf-Ack */ 3347 type = CONF_ACK; 3348 3349 if (debug) { 3350 addlog(" %s [%s]", 3351 ip6_sprintf(&desiredaddr), 3352 sppp_cp_type_name(type)); 3353 } 3354 continue; 3355 } 3356 3357 memset(&suggestaddr, 0, sizeof(&suggestaddr)); 3358 if (collision && nohisaddr) { 3359 /* collision, hisaddr unknown - Conf-Rej */ 3360 type = CONF_REJ; 3361 memset(&p[2], 0, 8); 3362 } else { 3363 /* 3364 * - no collision, hisaddr unknown, or 3365 * - collision, hisaddr known 3366 * Conf-Nak, suggest hisaddr 3367 */ 3368 type = CONF_NAK; 3369 sppp_suggest_ip6_addr(sp, &suggestaddr); 3370 bcopy(&suggestaddr.s6_addr[8], &p[2], 8); 3371 } 3372 if (debug) 3373 addlog(" %s [%s]", ip6_sprintf(&desiredaddr), 3374 sppp_cp_type_name(type)); 3375 break; 3376 } 3377 /* Add the option to nak'ed list. */ 3378 bcopy (p, r, p[1]); 3379 r += p[1]; 3380 rlen += p[1]; 3381 } 3382 3383 if (rlen == 0 && type == CONF_ACK) { 3384 if (debug) 3385 addlog(" send %s\n", sppp_cp_type_name(type)); 3386 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1); 3387 } else { 3388 #ifdef notdef 3389 if (type == CONF_ACK) 3390 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3391 #endif 3392 3393 if (debug) { 3394 addlog(" send %s suggest %s\n", 3395 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); 3396 } 3397 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3398 } 3399 3400 end: 3401 free (buf, M_TEMP); 3402 return (rlen == 0); 3403 } 3404 3405 /* 3406 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3407 * negotiation. 3408 */ 3409 static void 3410 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3411 { 3412 u_char *buf, *p; 3413 struct ifnet *ifp = &sp->pp_if; 3414 int debug = ifp->if_flags & IFF_DEBUG; 3415 3416 len -= 4; 3417 buf = malloc (len, M_TEMP, M_NOWAIT); 3418 if (!buf) 3419 return; 3420 3421 if (debug) 3422 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:", 3423 SPP_ARGS(ifp)); 3424 3425 p = (void*) (h+1); 3426 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3427 if (debug) 3428 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3429 switch (*p) { 3430 case IPV6CP_OPT_IFID: 3431 /* 3432 * Peer doesn't grok address option. This is 3433 * bad. XXX Should we better give up here? 3434 */ 3435 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3436 break; 3437 #ifdef notyet 3438 case IPV6CP_OPT_COMPRESS: 3439 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3440 break; 3441 #endif 3442 } 3443 } 3444 if (debug) 3445 addlog("\n"); 3446 free (buf, M_TEMP); 3447 return; 3448 } 3449 3450 /* 3451 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3452 * negotiation. 3453 */ 3454 static void 3455 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3456 { 3457 u_char *buf, *p; 3458 struct ifnet *ifp = &sp->pp_if; 3459 int debug = ifp->if_flags & IFF_DEBUG; 3460 struct in6_addr suggestaddr; 3461 3462 len -= 4; 3463 buf = malloc (len, M_TEMP, M_NOWAIT); 3464 if (!buf) 3465 return; 3466 3467 if (debug) 3468 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:", 3469 SPP_ARGS(ifp)); 3470 3471 p = (void*) (h+1); 3472 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3473 if (debug) 3474 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3475 switch (*p) { 3476 case IPV6CP_OPT_IFID: 3477 /* 3478 * Peer doesn't like our local ifid. See 3479 * if we can do something for him. We'll drop 3480 * him our address then. 3481 */ 3482 if (len < 10 || p[1] != 10) 3483 break; 3484 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3485 suggestaddr.s6_addr16[0] = htons(0xfe80); 3486 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3487 bcopy(&p[2], &suggestaddr.s6_addr[8], 8); 3488 3489 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3490 if (debug) 3491 addlog(" [suggestaddr %s]", 3492 ip6_sprintf(&suggestaddr)); 3493 #ifdef IPV6CP_MYIFID_DYN 3494 /* 3495 * When doing dynamic address assignment, 3496 * we accept his offer. 3497 */ 3498 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3499 struct in6_addr lastsuggest; 3500 /* 3501 * If <suggested myaddr from peer> equals to 3502 * <hisaddr we have suggested last time>, 3503 * we have a collision. generate new random 3504 * ifid. 3505 */ 3506 sppp_suggest_ip6_addr(&lastsuggest); 3507 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3508 lastsuggest)) { 3509 if (debug) 3510 addlog(" [random]"); 3511 sppp_gen_ip6_addr(sp, &suggestaddr); 3512 } 3513 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3514 if (debug) 3515 addlog(" [agree]"); 3516 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3517 } 3518 #else 3519 /* 3520 * Since we do not do dynamic address assignment, 3521 * we ignore it and thus continue to negotiate 3522 * our already existing value. This can possibly 3523 * go into infinite request-reject loop. 3524 * 3525 * This is not likely because we normally use 3526 * ifid based on MAC-address. 3527 * If you have no ethernet card on the node, too bad. 3528 * XXX should we use fail_counter? 3529 */ 3530 #endif 3531 break; 3532 #ifdef notyet 3533 case IPV6CP_OPT_COMPRESS: 3534 /* 3535 * Peer wants different compression parameters. 3536 */ 3537 break; 3538 #endif 3539 } 3540 } 3541 if (debug) 3542 addlog("\n"); 3543 free (buf, M_TEMP); 3544 return; 3545 } 3546 3547 static void 3548 sppp_ipv6cp_tlu(struct sppp *sp) 3549 { 3550 /* we are up - notify isdn daemon */ 3551 if (sp->pp_con) 3552 sp->pp_con(sp); 3553 } 3554 3555 static void 3556 sppp_ipv6cp_tld(struct sppp *sp) 3557 { 3558 } 3559 3560 static void 3561 sppp_ipv6cp_tls(struct sppp *sp) 3562 { 3563 /* indicate to LCP that it must stay alive */ 3564 sp->lcp.protos |= (1 << IDX_IPV6CP); 3565 } 3566 3567 static void 3568 sppp_ipv6cp_tlf(struct sppp *sp) 3569 { 3570 /* we no longer need LCP */ 3571 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3572 } 3573 3574 static void 3575 sppp_ipv6cp_scr(struct sppp *sp) 3576 { 3577 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3578 struct in6_addr ouraddr; 3579 int i = 0; 3580 3581 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3582 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3583 opt[i++] = IPV6CP_OPT_IFID; 3584 opt[i++] = 10; 3585 bcopy(&ouraddr.s6_addr[8], &opt[i], 8); 3586 i += 8; 3587 } 3588 3589 #ifdef notyet 3590 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3591 opt[i++] = IPV6CP_OPT_COMPRESSION; 3592 opt[i++] = 4; 3593 opt[i++] = 0; /* TBD */ 3594 opt[i++] = 0; /* TBD */ 3595 /* variable length data may follow */ 3596 } 3597 #endif 3598 3599 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3600 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 3601 } 3602 #else /*INET6*/ 3603 static void sppp_ipv6cp_init(struct sppp *sp) 3604 { 3605 } 3606 3607 static void sppp_ipv6cp_up(struct sppp *sp) 3608 { 3609 } 3610 3611 static void sppp_ipv6cp_down(struct sppp *sp) 3612 { 3613 } 3614 3615 3616 static void sppp_ipv6cp_open(struct sppp *sp) 3617 { 3618 } 3619 3620 static void sppp_ipv6cp_close(struct sppp *sp) 3621 { 3622 } 3623 3624 static void sppp_ipv6cp_TO(void *sp) 3625 { 3626 } 3627 3628 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3629 { 3630 return 0; 3631 } 3632 3633 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3634 { 3635 } 3636 3637 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3638 { 3639 } 3640 3641 static void sppp_ipv6cp_tlu(struct sppp *sp) 3642 { 3643 } 3644 3645 static void sppp_ipv6cp_tld(struct sppp *sp) 3646 { 3647 } 3648 3649 static void sppp_ipv6cp_tls(struct sppp *sp) 3650 { 3651 } 3652 3653 static void sppp_ipv6cp_tlf(struct sppp *sp) 3654 { 3655 } 3656 3657 static void sppp_ipv6cp_scr(struct sppp *sp) 3658 { 3659 } 3660 #endif /*INET6*/ 3661 3662 3663 /* 3664 *--------------------------------------------------------------------------* 3665 * * 3666 * The CHAP implementation. * 3667 * * 3668 *--------------------------------------------------------------------------* 3669 */ 3670 3671 /* 3672 * The authentication protocols don't employ a full-fledged state machine as 3673 * the control protocols do, since they do have Open and Close events, but 3674 * not Up and Down, nor are they explicitly terminated. Also, use of the 3675 * authentication protocols may be different in both directions (this makes 3676 * sense, think of a machine that never accepts incoming calls but only 3677 * calls out, it doesn't require the called party to authenticate itself). 3678 * 3679 * Our state machine for the local authentication protocol (we are requesting 3680 * the peer to authenticate) looks like: 3681 * 3682 * RCA- 3683 * +--------------------------------------------+ 3684 * V scn,tld| 3685 * +--------+ Close +---------+ RCA+ 3686 * | |<----------------------------------| |------+ 3687 * +--->| Closed | TO* | Opened | sca | 3688 * | | |-----+ +-------| |<-----+ 3689 * | +--------+ irc | | +---------+ 3690 * | ^ | | ^ 3691 * | | | | | 3692 * | | | | | 3693 * | TO-| | | | 3694 * | |tld TO+ V | | 3695 * | | +------->+ | | 3696 * | | | | | | 3697 * | +--------+ V | | 3698 * | | |<----+<--------------------+ | 3699 * | | Req- | scr | 3700 * | | Sent | | 3701 * | | | | 3702 * | +--------+ | 3703 * | RCA- | | RCA+ | 3704 * +------+ +------------------------------------------+ 3705 * scn,tld sca,irc,ict,tlu 3706 * 3707 * 3708 * with: 3709 * 3710 * Open: LCP reached authentication phase 3711 * Close: LCP reached terminate phase 3712 * 3713 * RCA+: received reply (pap-req, chap-response), acceptable 3714 * RCN: received reply (pap-req, chap-response), not acceptable 3715 * TO+: timeout with restart counter >= 0 3716 * TO-: timeout with restart counter < 0 3717 * TO*: reschedule timeout for CHAP 3718 * 3719 * scr: send request packet (none for PAP, chap-challenge) 3720 * sca: send ack packet (pap-ack, chap-success) 3721 * scn: send nak packet (pap-nak, chap-failure) 3722 * ict: initialize re-challenge timer (CHAP only) 3723 * 3724 * tlu: this-layer-up, LCP reaches network phase 3725 * tld: this-layer-down, LCP enters terminate phase 3726 * 3727 * Note that in CHAP mode, after sending a new challenge, while the state 3728 * automaton falls back into Req-Sent state, it doesn't signal a tld 3729 * event to LCP, so LCP remains in network phase. Only after not getting 3730 * any response (or after getting an unacceptable response), CHAP closes, 3731 * causing LCP to enter terminate phase. 3732 * 3733 * With PAP, there is no initial request that can be sent. The peer is 3734 * expected to send one based on the successful negotiation of PAP as 3735 * the authentication protocol during the LCP option negotiation. 3736 * 3737 * Incoming authentication protocol requests (remote requests 3738 * authentication, we are peer) don't employ a state machine at all, 3739 * they are simply answered. Some peers [Ascend P50 firmware rev 3740 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 3741 * still in authentication phase (thereby violating the standard that 3742 * demands that these NCP packets are to be discarded), so we keep 3743 * track of the peer demanding us to authenticate, and only proceed to 3744 * phase network once we've seen a positive acknowledge for the 3745 * authentication. 3746 */ 3747 3748 /* 3749 * Handle incoming CHAP packets. 3750 */ 3751 void 3752 sppp_chap_input(struct sppp *sp, struct mbuf *m) 3753 { 3754 STDDCL; 3755 struct lcp_header *h; 3756 int len, x; 3757 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 3758 int value_len, name_len; 3759 MD5_CTX ctx; 3760 3761 len = m->m_pkthdr.len; 3762 if (len < 4) { 3763 if (debug) 3764 log(LOG_DEBUG, 3765 SPP_FMT "chap invalid packet length: %d bytes\n", 3766 SPP_ARGS(ifp), len); 3767 return; 3768 } 3769 h = mtod (m, struct lcp_header*); 3770 if (len > ntohs (h->len)) 3771 len = ntohs (h->len); 3772 3773 switch (h->type) { 3774 /* challenge, failure and success are his authproto */ 3775 case CHAP_CHALLENGE: 3776 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 3777 /* can't do anything usefull */ 3778 sp->pp_auth_failures++; 3779 printf(SPP_FMT "chap input without my name and my secret being set\n", 3780 SPP_ARGS(ifp)); 3781 break; 3782 } 3783 value = 1 + (u_char*)(h+1); 3784 value_len = value[-1]; 3785 name = value + value_len; 3786 name_len = len - value_len - 5; 3787 if (name_len < 0) { 3788 if (debug) { 3789 log(LOG_DEBUG, 3790 SPP_FMT "chap corrupted challenge " 3791 "<%s id=0x%x len=%d", 3792 SPP_ARGS(ifp), 3793 sppp_auth_type_name(PPP_CHAP, h->type), 3794 h->ident, ntohs(h->len)); 3795 if (len > 4) 3796 sppp_print_bytes((u_char*) (h+1), len-4); 3797 addlog(">\n"); 3798 } 3799 break; 3800 } 3801 3802 if (debug) { 3803 log(LOG_DEBUG, 3804 SPP_FMT "chap input <%s id=0x%x len=%d name=", 3805 SPP_ARGS(ifp), 3806 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 3807 ntohs(h->len)); 3808 sppp_print_string((char*) name, name_len); 3809 addlog(" value-size=%d value=", value_len); 3810 sppp_print_bytes(value, value_len); 3811 addlog(">\n"); 3812 } 3813 3814 /* Compute reply value. */ 3815 MD5Init(&ctx); 3816 MD5Update(&ctx, &h->ident, 1); 3817 MD5Update(&ctx, sp->myauth.secret, strlen(sp->myauth.secret)); 3818 MD5Update(&ctx, value, value_len); 3819 MD5Final(digest, &ctx); 3820 dsize = sizeof digest; 3821 3822 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 3823 sizeof dsize, (const char *)&dsize, 3824 sizeof digest, digest, 3825 strlen(sp->myauth.name), 3826 sp->myauth.name, 3827 0); 3828 break; 3829 3830 case CHAP_SUCCESS: 3831 if (debug) { 3832 log(LOG_DEBUG, SPP_FMT "chap success", 3833 SPP_ARGS(ifp)); 3834 if (len > 4) { 3835 addlog(": "); 3836 sppp_print_string((char*)(h + 1), len - 4); 3837 } 3838 addlog("\n"); 3839 } 3840 x = splnet(); 3841 sp->pp_auth_failures = 0; 3842 sp->pp_flags &= ~PP_NEEDAUTH; 3843 if (sp->myauth.proto == PPP_CHAP && 3844 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 3845 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 3846 /* 3847 * We are authenticator for CHAP but didn't 3848 * complete yet. Leave it to tlu to proceed 3849 * to network phase. 3850 */ 3851 splx(x); 3852 break; 3853 } 3854 splx(x); 3855 sppp_phase_network(sp); 3856 break; 3857 3858 case CHAP_FAILURE: 3859 x = splnet(); 3860 sp->pp_auth_failures++; 3861 splx(x); 3862 if (debug) { 3863 log(LOG_INFO, SPP_FMT "chap failure", 3864 SPP_ARGS(ifp)); 3865 if (len > 4) { 3866 addlog(": "); 3867 sppp_print_string((char*)(h + 1), len - 4); 3868 } 3869 addlog("\n"); 3870 } else 3871 log(LOG_INFO, SPP_FMT "chap failure\n", 3872 SPP_ARGS(ifp)); 3873 /* await LCP shutdown by authenticator */ 3874 break; 3875 3876 /* response is my authproto */ 3877 case CHAP_RESPONSE: 3878 if (sp->hisauth.secret == NULL) { 3879 /* can't do anything usefull */ 3880 printf(SPP_FMT "chap input without his secret being set\n", 3881 SPP_ARGS(ifp)); 3882 break; 3883 } 3884 value = 1 + (u_char*)(h+1); 3885 value_len = value[-1]; 3886 name = value + value_len; 3887 name_len = len - value_len - 5; 3888 if (name_len < 0) { 3889 if (debug) { 3890 log(LOG_DEBUG, 3891 SPP_FMT "chap corrupted response " 3892 "<%s id=0x%x len=%d", 3893 SPP_ARGS(ifp), 3894 sppp_auth_type_name(PPP_CHAP, h->type), 3895 h->ident, ntohs(h->len)); 3896 if (len > 4) 3897 sppp_print_bytes((u_char*)(h+1), len-4); 3898 addlog(">\n"); 3899 } 3900 break; 3901 } 3902 if (h->ident != sp->confid[IDX_CHAP]) { 3903 if (debug) 3904 log(LOG_DEBUG, 3905 SPP_FMT "chap dropping response for old ID " 3906 "(got %d, expected %d)\n", 3907 SPP_ARGS(ifp), 3908 h->ident, sp->confid[IDX_CHAP]); 3909 break; 3910 } 3911 if (sp->hisauth.name != NULL && 3912 (name_len != strlen(sp->hisauth.name) 3913 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 3914 log(LOG_INFO, SPP_FMT "chap response, his name ", 3915 SPP_ARGS(ifp)); 3916 sppp_print_string(name, name_len); 3917 addlog(" != expected "); 3918 sppp_print_string(sp->hisauth.name, 3919 strlen(sp->hisauth.name)); 3920 addlog("\n"); 3921 goto chap_failure; 3922 } 3923 if (debug) { 3924 log(LOG_DEBUG, SPP_FMT "chap input(%s) " 3925 "<%s id=0x%x len=%d name=", 3926 SPP_ARGS(ifp), 3927 sppp_state_name(sp->state[IDX_CHAP]), 3928 sppp_auth_type_name(PPP_CHAP, h->type), 3929 h->ident, ntohs (h->len)); 3930 sppp_print_string((char*)name, name_len); 3931 addlog(" value-size=%d value=", value_len); 3932 sppp_print_bytes(value, value_len); 3933 addlog(">\n"); 3934 } 3935 if (value_len != sizeof(sp->myauth.challenge)) { 3936 if (debug) 3937 log(LOG_DEBUG, 3938 SPP_FMT "chap bad hash value length: " 3939 "%d bytes, should be %ld\n", 3940 SPP_ARGS(ifp), value_len, 3941 (long) sizeof(sp->myauth.challenge)); 3942 goto chap_failure; 3943 } 3944 3945 MD5Init(&ctx); 3946 MD5Update(&ctx, &h->ident, 1); 3947 MD5Update(&ctx, sp->hisauth.secret, 3948 strlen(sp->hisauth.secret)); 3949 MD5Update(&ctx, sp->myauth.challenge, sizeof(sp->myauth.challenge)); 3950 MD5Final(digest, &ctx); 3951 3952 #define FAILMSG "Failed..." 3953 #define SUCCMSG "Welcome!" 3954 3955 if (value_len != sizeof digest || 3956 memcmp(digest, value, value_len) != 0) { 3957 chap_failure: 3958 /* action scn, tld */ 3959 x = splnet(); 3960 sp->pp_auth_failures++; 3961 splx(x); 3962 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 3963 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 3964 0); 3965 chap.tld(sp); 3966 break; 3967 } 3968 sp->pp_auth_failures = 0; 3969 /* action sca, perhaps tlu */ 3970 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 3971 sp->state[IDX_CHAP] == STATE_OPENED) 3972 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 3973 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 3974 0); 3975 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 3976 sppp_cp_change_state(&chap, sp, STATE_OPENED); 3977 chap.tlu(sp); 3978 } 3979 break; 3980 3981 default: 3982 /* Unknown CHAP packet type -- ignore. */ 3983 if (debug) { 3984 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) " 3985 "<0x%x id=0x%xh len=%d", 3986 SPP_ARGS(ifp), 3987 sppp_state_name(sp->state[IDX_CHAP]), 3988 h->type, h->ident, ntohs(h->len)); 3989 if (len > 4) 3990 sppp_print_bytes((u_char*)(h+1), len-4); 3991 addlog(">\n"); 3992 } 3993 break; 3994 3995 } 3996 } 3997 3998 static void 3999 sppp_chap_init(struct sppp *sp) 4000 { 4001 /* Chap doesn't have STATE_INITIAL at all. */ 4002 sp->state[IDX_CHAP] = STATE_CLOSED; 4003 sp->fail_counter[IDX_CHAP] = 0; 4004 sp->pp_seq[IDX_CHAP] = 0; 4005 sp->pp_rseq[IDX_CHAP] = 0; 4006 callout_init(&sp->ch[IDX_CHAP]); 4007 } 4008 4009 static void 4010 sppp_chap_open(struct sppp *sp) 4011 { 4012 if (sp->myauth.proto == PPP_CHAP && 4013 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4014 /* we are authenticator for CHAP, start it */ 4015 chap.scr(sp); 4016 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4017 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4018 } 4019 /* nothing to be done if we are peer, await a challenge */ 4020 } 4021 4022 static void 4023 sppp_chap_close(struct sppp *sp) 4024 { 4025 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4026 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4027 } 4028 4029 static void 4030 sppp_chap_TO(void *cookie) 4031 { 4032 struct sppp *sp = (struct sppp *)cookie; 4033 STDDCL; 4034 int s; 4035 4036 s = splnet(); 4037 if (debug) 4038 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n", 4039 SPP_ARGS(ifp), 4040 sppp_state_name(sp->state[IDX_CHAP]), 4041 sp->rst_counter[IDX_CHAP]); 4042 4043 if (--sp->rst_counter[IDX_CHAP] < 0) 4044 /* TO- event */ 4045 switch (sp->state[IDX_CHAP]) { 4046 case STATE_REQ_SENT: 4047 chap.tld(sp); 4048 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4049 break; 4050 } 4051 else 4052 /* TO+ (or TO*) event */ 4053 switch (sp->state[IDX_CHAP]) { 4054 case STATE_OPENED: 4055 /* TO* event */ 4056 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4057 /* fall through */ 4058 case STATE_REQ_SENT: 4059 chap.scr(sp); 4060 /* sppp_cp_change_state() will restart the timer */ 4061 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4062 break; 4063 } 4064 4065 splx(s); 4066 } 4067 4068 static void 4069 sppp_chap_tlu(struct sppp *sp) 4070 { 4071 STDDCL; 4072 int i, x; 4073 4074 i = 0; 4075 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4076 4077 /* 4078 * Some broken CHAP implementations (Conware CoNet, firmware 4079 * 4.0.?) don't want to re-authenticate their CHAP once the 4080 * initial challenge-response exchange has taken place. 4081 * Provide for an option to avoid rechallenges. 4082 */ 4083 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4084 /* 4085 * Compute the re-challenge timeout. This will yield 4086 * a number between 300 and 810 seconds. 4087 */ 4088 i = 300 + ((unsigned)(random() & 0xff00) >> 7); 4089 4090 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4091 } 4092 4093 if (debug) { 4094 log(LOG_DEBUG, 4095 SPP_FMT "chap %s, ", 4096 SPP_ARGS(ifp), 4097 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4098 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4099 addlog("next re-challenge in %d seconds\n", i); 4100 else 4101 addlog("re-challenging supressed\n"); 4102 } 4103 4104 x = splnet(); 4105 sp->pp_auth_failures = 0; 4106 /* indicate to LCP that we need to be closed down */ 4107 sp->lcp.protos |= (1 << IDX_CHAP); 4108 4109 if (sp->pp_flags & PP_NEEDAUTH) { 4110 /* 4111 * Remote is authenticator, but his auth proto didn't 4112 * complete yet. Defer the transition to network 4113 * phase. 4114 */ 4115 splx(x); 4116 return; 4117 } 4118 splx(x); 4119 4120 /* 4121 * If we are already in phase network, we are done here. This 4122 * is the case if this is a dummy tlu event after a re-challenge. 4123 */ 4124 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4125 sppp_phase_network(sp); 4126 } 4127 4128 static void 4129 sppp_chap_tld(struct sppp *sp) 4130 { 4131 STDDCL; 4132 4133 if (debug) 4134 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp)); 4135 callout_stop(&sp->ch[IDX_CHAP]); 4136 sp->lcp.protos &= ~(1 << IDX_CHAP); 4137 4138 lcp.Close(sp); 4139 } 4140 4141 static void 4142 sppp_chap_scr(struct sppp *sp) 4143 { 4144 struct timeval tv; 4145 u_int32_t *ch, seed; 4146 u_char clen; 4147 4148 if (sp->myauth.name == NULL) { 4149 /* can't do anything usefull */ 4150 printf(SPP_FMT "chap starting without my name being set\n", 4151 SPP_ARGS(&sp->pp_if)); 4152 return; 4153 } 4154 4155 /* Compute random challenge. */ 4156 ch = (u_int32_t *)sp->myauth.challenge; 4157 microtime(&tv); 4158 seed = tv.tv_sec ^ tv.tv_usec; 4159 ch[0] = seed ^ random(); 4160 ch[1] = seed ^ random(); 4161 ch[2] = seed ^ random(); 4162 ch[3] = seed ^ random(); 4163 clen = 16; /* 4 * sizeof(u_int32_t) */ 4164 4165 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4166 4167 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4168 sizeof clen, (const char *)&clen, 4169 sizeof(sp->myauth.challenge), sp->myauth.challenge, 4170 strlen(sp->myauth.name), 4171 sp->myauth.name, 4172 0); 4173 } 4174 4175 /* 4176 *--------------------------------------------------------------------------* 4177 * * 4178 * The PAP implementation. * 4179 * * 4180 *--------------------------------------------------------------------------* 4181 */ 4182 /* 4183 * For PAP, we need to keep a little state also if we are the peer, not the 4184 * authenticator. This is since we don't get a request to authenticate, but 4185 * have to repeatedly authenticate ourself until we got a response (or the 4186 * retry counter is expired). 4187 */ 4188 4189 /* 4190 * Handle incoming PAP packets. */ 4191 static void 4192 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4193 { 4194 STDDCL; 4195 struct lcp_header *h; 4196 int len, x; 4197 u_char mlen; 4198 char *name, *secret, sname, ssecret; 4199 int name_len, secret_len; 4200 4201 len = m->m_pkthdr.len; 4202 if (len < 5) { 4203 if (debug) 4204 log(LOG_DEBUG, 4205 SPP_FMT "pap invalid packet length: %d bytes\n", 4206 SPP_ARGS(ifp), len); 4207 return; 4208 } 4209 h = mtod (m, struct lcp_header*); 4210 if (len > ntohs (h->len)) 4211 len = ntohs (h->len); 4212 switch (h->type) { 4213 /* PAP request is my authproto */ 4214 case PAP_REQ: 4215 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4216 /* can't do anything usefull */ 4217 printf(SPP_FMT "pap request without his name and his secret being set\n", 4218 SPP_ARGS(ifp)); 4219 break; 4220 } 4221 name = 1 + (u_char*)(h+1); 4222 name_len = name[-1]; 4223 secret = name + name_len + 1; 4224 if (name_len > len - 6 || 4225 (secret_len = secret[-1]) > len - 6 - name_len) { 4226 if (debug) { 4227 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4228 "<%s id=0x%x len=%d", 4229 SPP_ARGS(ifp), 4230 sppp_auth_type_name(PPP_PAP, h->type), 4231 h->ident, ntohs(h->len)); 4232 if (len > 4) 4233 sppp_print_bytes((u_char*)(h+1), len-4); 4234 addlog(">\n"); 4235 } 4236 break; 4237 } 4238 if (debug) { 4239 log(LOG_DEBUG, SPP_FMT "pap input(%s) " 4240 "<%s id=0x%x len=%d name=", 4241 SPP_ARGS(ifp), 4242 sppp_state_name(sp->state[IDX_PAP]), 4243 sppp_auth_type_name(PPP_PAP, h->type), 4244 h->ident, ntohs(h->len)); 4245 sppp_print_string((char*)name, name_len); 4246 addlog(" secret="); 4247 sppp_print_string((char*)secret, secret_len); 4248 addlog(">\n"); 4249 } 4250 sname = name[name_len]; 4251 ssecret = secret[secret_len]; 4252 name[name_len] = '\0'; 4253 secret[secret_len] = '\0'; 4254 if (strcmp(name, sp->hisauth.name) != 0 || 4255 strcmp(secret, sp->hisauth.secret) != 0) { 4256 name[name_len] = sname; 4257 secret[secret_len] = ssecret; 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 name[name_len] = sname; 4269 secret[secret_len] = ssecret; 4270 /* action sca, perhaps tlu */ 4271 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4272 sp->state[IDX_PAP] == STATE_OPENED) { 4273 mlen = sizeof(SUCCMSG) - 1; 4274 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4275 sizeof mlen, (const char *)&mlen, 4276 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 4277 0); 4278 } 4279 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4280 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4281 pap.tlu(sp); 4282 } 4283 break; 4284 4285 /* ack and nak are his authproto */ 4286 case PAP_ACK: 4287 callout_stop(&sp->pap_my_to_ch); 4288 if (debug) { 4289 log(LOG_DEBUG, SPP_FMT "pap success", 4290 SPP_ARGS(ifp)); 4291 name_len = *(char *)h; 4292 if (len > 5 && name_len) { 4293 addlog(": "); 4294 sppp_print_string((char*)(h+1), name_len); 4295 } 4296 addlog("\n"); 4297 } 4298 x = splnet(); 4299 sp->pp_auth_failures = 0; 4300 sp->pp_flags &= ~PP_NEEDAUTH; 4301 if (sp->myauth.proto == PPP_PAP && 4302 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4303 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4304 /* 4305 * We are authenticator for PAP but didn't 4306 * complete yet. Leave it to tlu to proceed 4307 * to network phase. 4308 */ 4309 splx(x); 4310 break; 4311 } 4312 splx(x); 4313 sppp_phase_network(sp); 4314 break; 4315 4316 case PAP_NAK: 4317 callout_stop(&sp->pap_my_to_ch); 4318 sp->pp_auth_failures++; 4319 if (debug) { 4320 log(LOG_INFO, SPP_FMT "pap failure", 4321 SPP_ARGS(ifp)); 4322 name_len = *(char *)h; 4323 if (len > 5 && name_len) { 4324 addlog(": "); 4325 sppp_print_string((char*)(h+1), name_len); 4326 } 4327 addlog("\n"); 4328 } else 4329 log(LOG_INFO, SPP_FMT "pap failure\n", 4330 SPP_ARGS(ifp)); 4331 /* await LCP shutdown by authenticator */ 4332 break; 4333 4334 default: 4335 /* Unknown PAP packet type -- ignore. */ 4336 if (debug) { 4337 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4338 "<0x%x id=0x%x len=%d", 4339 SPP_ARGS(ifp), 4340 h->type, h->ident, ntohs(h->len)); 4341 if (len > 4) 4342 sppp_print_bytes((u_char*)(h+1), len-4); 4343 addlog(">\n"); 4344 } 4345 break; 4346 4347 } 4348 } 4349 4350 static void 4351 sppp_pap_init(struct sppp *sp) 4352 { 4353 /* PAP doesn't have STATE_INITIAL at all. */ 4354 sp->state[IDX_PAP] = STATE_CLOSED; 4355 sp->fail_counter[IDX_PAP] = 0; 4356 sp->pp_seq[IDX_PAP] = 0; 4357 sp->pp_rseq[IDX_PAP] = 0; 4358 callout_init(&sp->ch[IDX_PAP]); 4359 callout_init(&sp->pap_my_to_ch); 4360 } 4361 4362 static void 4363 sppp_pap_open(struct sppp *sp) 4364 { 4365 if (sp->hisauth.proto == PPP_PAP && 4366 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4367 /* we are authenticator for PAP, start our timer */ 4368 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4369 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4370 } 4371 if (sp->myauth.proto == PPP_PAP) { 4372 /* we are peer, send a request, and start a timer */ 4373 pap.scr(sp); 4374 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4375 sppp_pap_my_TO, sp); 4376 } 4377 } 4378 4379 static void 4380 sppp_pap_close(struct sppp *sp) 4381 { 4382 if (sp->state[IDX_PAP] != STATE_CLOSED) 4383 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4384 } 4385 4386 /* 4387 * That's the timeout routine if we are authenticator. Since the 4388 * authenticator is basically passive in PAP, we can't do much here. 4389 */ 4390 static void 4391 sppp_pap_TO(void *cookie) 4392 { 4393 struct sppp *sp = (struct sppp *)cookie; 4394 STDDCL; 4395 int s; 4396 4397 s = splnet(); 4398 if (debug) 4399 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n", 4400 SPP_ARGS(ifp), 4401 sppp_state_name(sp->state[IDX_PAP]), 4402 sp->rst_counter[IDX_PAP]); 4403 4404 if (--sp->rst_counter[IDX_PAP] < 0) 4405 /* TO- event */ 4406 switch (sp->state[IDX_PAP]) { 4407 case STATE_REQ_SENT: 4408 pap.tld(sp); 4409 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4410 break; 4411 } 4412 else 4413 /* TO+ event, not very much we could do */ 4414 switch (sp->state[IDX_PAP]) { 4415 case STATE_REQ_SENT: 4416 /* sppp_cp_change_state() will restart the timer */ 4417 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4418 break; 4419 } 4420 4421 splx(s); 4422 } 4423 4424 /* 4425 * That's the timeout handler if we are peer. Since the peer is active, 4426 * we need to retransmit our PAP request since it is apparently lost. 4427 * XXX We should impose a max counter. 4428 */ 4429 static void 4430 sppp_pap_my_TO(void *cookie) 4431 { 4432 struct sppp *sp = (struct sppp *)cookie; 4433 STDDCL; 4434 4435 if (debug) 4436 log(LOG_DEBUG, SPP_FMT "pap peer TO\n", 4437 SPP_ARGS(ifp)); 4438 4439 pap.scr(sp); 4440 } 4441 4442 static void 4443 sppp_pap_tlu(struct sppp *sp) 4444 { 4445 STDDCL; 4446 int x; 4447 4448 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4449 4450 if (debug) 4451 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 4452 SPP_ARGS(ifp), pap.name); 4453 4454 x = splnet(); 4455 sp->pp_auth_failures = 0; 4456 /* indicate to LCP that we need to be closed down */ 4457 sp->lcp.protos |= (1 << IDX_PAP); 4458 4459 if (sp->pp_flags & PP_NEEDAUTH) { 4460 /* 4461 * Remote is authenticator, but his auth proto didn't 4462 * complete yet. Defer the transition to network 4463 * phase. 4464 */ 4465 splx(x); 4466 return; 4467 } 4468 splx(x); 4469 sppp_phase_network(sp); 4470 } 4471 4472 static void 4473 sppp_pap_tld(struct sppp *sp) 4474 { 4475 STDDCL; 4476 4477 if (debug) 4478 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp)); 4479 callout_stop(&sp->ch[IDX_PAP]); 4480 callout_stop(&sp->pap_my_to_ch); 4481 sp->lcp.protos &= ~(1 << IDX_PAP); 4482 4483 lcp.Close(sp); 4484 } 4485 4486 static void 4487 sppp_pap_scr(struct sppp *sp) 4488 { 4489 u_char idlen, pwdlen; 4490 4491 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4492 /* can't do anything usefull */ 4493 printf(SPP_FMT "pap starting without my name and secret being set\n", 4494 SPP_ARGS(&sp->pp_if)); 4495 return; 4496 } 4497 4498 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4499 pwdlen = strlen(sp->myauth.secret); 4500 idlen = strlen(sp->myauth.name); 4501 4502 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4503 sizeof idlen, (const char *)&idlen, 4504 idlen, sp->myauth.name, 4505 sizeof pwdlen, (const char *)&pwdlen, 4506 pwdlen, sp->myauth.secret, 4507 0); 4508 } 4509 4510 /* 4511 * Random miscellaneous functions. 4512 */ 4513 4514 /* 4515 * Send a PAP or CHAP proto packet. 4516 * 4517 * Varadic function, each of the elements for the ellipsis is of type 4518 * ``size_t mlen, const u_char *msg''. Processing will stop iff 4519 * mlen == 0. 4520 * NOTE: never declare variadic functions with types subject to type 4521 * promotion (i.e. u_char). This is asking for big trouble depending 4522 * on the architecture you are on... 4523 */ 4524 4525 static void 4526 sppp_auth_send(const struct cp *cp, struct sppp *sp, 4527 unsigned int type, unsigned int id, 4528 ...) 4529 { 4530 STDDCL; 4531 struct lcp_header *lh; 4532 struct mbuf *m; 4533 u_char *p; 4534 int len; 4535 size_t pkthdrlen; 4536 unsigned int mlen; 4537 const char *msg; 4538 va_list ap; 4539 4540 MGETHDR (m, M_DONTWAIT, MT_DATA); 4541 if (! m) 4542 return; 4543 m->m_pkthdr.rcvif = 0; 4544 4545 if (sp->pp_flags & PP_NOFRAMING) { 4546 *mtod(m, u_int16_t*) = htons(cp->proto); 4547 pkthdrlen = 2; 4548 lh = (struct lcp_header*)(mtod(m, u_int8_t*)+2); 4549 } else { 4550 struct ppp_header *h; 4551 h = mtod (m, struct ppp_header*); 4552 h->address = PPP_ALLSTATIONS; /* broadcast address */ 4553 h->control = PPP_UI; /* Unnumbered Info */ 4554 h->protocol = htons(cp->proto); 4555 pkthdrlen = PPP_HEADER_LEN; 4556 4557 lh = (struct lcp_header*)(h + 1); 4558 } 4559 4560 lh->type = type; 4561 lh->ident = id; 4562 p = (u_char*) (lh+1); 4563 4564 va_start(ap, id); 4565 len = 0; 4566 4567 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 4568 msg = va_arg(ap, const char *); 4569 len += mlen; 4570 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 4571 va_end(ap); 4572 m_freem(m); 4573 return; 4574 } 4575 4576 bcopy(msg, p, mlen); 4577 p += mlen; 4578 } 4579 va_end(ap); 4580 4581 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 4582 lh->len = htons (LCP_HEADER_LEN + len); 4583 4584 if (debug) { 4585 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 4586 SPP_ARGS(ifp), cp->name, 4587 sppp_auth_type_name(cp->proto, lh->type), 4588 lh->ident, ntohs(lh->len)); 4589 if (len) 4590 sppp_print_bytes((u_char*) (lh+1), len); 4591 addlog(">\n"); 4592 } 4593 if (IF_QFULL (&sp->pp_cpq)) { 4594 IF_DROP (&sp->pp_fastq); 4595 IF_DROP (&ifp->if_snd); 4596 m_freem (m); 4597 ++ifp->if_oerrors; 4598 return; 4599 } else 4600 IF_ENQUEUE (&sp->pp_cpq, m); 4601 if (! (ifp->if_flags & IFF_OACTIVE)) 4602 (*ifp->if_start) (ifp); 4603 ifp->if_obytes += m->m_pkthdr.len + 3; 4604 } 4605 4606 /* 4607 * Send keepalive packets, every 10 seconds. 4608 */ 4609 static void 4610 sppp_keepalive(void *dummy) 4611 { 4612 struct sppp *sp; 4613 int s; 4614 time_t now; 4615 4616 s = splnet(); 4617 now = mono_time.tv_sec; 4618 for (sp=spppq; sp; sp=sp->pp_next) { 4619 struct ifnet *ifp = &sp->pp_if; 4620 4621 /* check idle timeout */ 4622 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 4623 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 4624 /* idle timeout is enabled for this interface */ 4625 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 4626 if (ifp->if_flags & IFF_DEBUG) 4627 printf("%s: no activitiy for %lu seconds\n", 4628 sp->pp_if.if_xname, 4629 (unsigned long)(now-sp->pp_last_activity)); 4630 lcp.Close(sp); 4631 continue; 4632 } 4633 } 4634 4635 /* Keepalive mode disabled or channel down? */ 4636 if (! (sp->pp_flags & PP_KEEPALIVE) || 4637 ! (ifp->if_flags & IFF_RUNNING)) 4638 continue; 4639 4640 /* No keepalive in PPP mode if LCP not opened yet. */ 4641 if (! (sp->pp_flags & PP_CISCO) && 4642 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) 4643 continue; 4644 4645 if (sp->pp_alivecnt == MAXALIVECNT) { 4646 /* No keepalive packets got. Stop the interface. */ 4647 if_down (ifp); 4648 IF_PURGE (&sp->pp_cpq); 4649 if (! (sp->pp_flags & PP_CISCO)) { 4650 printf("%s: LCP keepalive timed out, going to restart the connection\n", 4651 ifp->if_xname); 4652 sp->pp_alivecnt = 0; 4653 4654 /* we are down, close all open protocols */ 4655 lcp.Close(sp); 4656 4657 /* And now prepare LCP to reestablish the link, if configured to do so. */ 4658 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 4659 4660 /* Close connection imediatly, completition of this 4661 * will summon the magic needed to reestablish it. */ 4662 sp->pp_tlf(sp); 4663 continue; 4664 } 4665 } 4666 if (sp->pp_alivecnt <= MAXALIVECNT) 4667 ++sp->pp_alivecnt; 4668 if (sp->pp_flags & PP_CISCO) 4669 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ, 4670 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 4671 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 4672 int32_t nmagic = htonl (sp->lcp.magic); 4673 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 4674 sppp_cp_send (sp, PPP_LCP, ECHO_REQ, 4675 sp->lcp.echoid, 4, &nmagic); 4676 } 4677 } 4678 splx(s); 4679 callout_reset(&keepalive_ch, hz * 10, sppp_keepalive, NULL); 4680 } 4681 4682 /* 4683 * Get both IP addresses. 4684 */ 4685 static void 4686 sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, u_int32_t *srcmask) 4687 { 4688 struct ifnet *ifp = &sp->pp_if; 4689 struct ifaddr *ifa; 4690 struct sockaddr_in *si, *sm; 4691 u_int32_t ssrc, ddst; 4692 4693 sm = NULL; 4694 ssrc = ddst = 0; 4695 /* 4696 * Pick the first AF_INET address from the list, 4697 * aliases don't make any sense on a p2p link anyway. 4698 */ 4699 si = 0; 4700 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 4701 if (ifa->ifa_addr->sa_family == AF_INET) { 4702 si = (struct sockaddr_in *)ifa->ifa_addr; 4703 sm = (struct sockaddr_in *)ifa->ifa_netmask; 4704 if (si) 4705 break; 4706 } 4707 } 4708 if (ifa) { 4709 if (si && si->sin_addr.s_addr) { 4710 ssrc = si->sin_addr.s_addr; 4711 if (srcmask) 4712 *srcmask = ntohl(sm->sin_addr.s_addr); 4713 } 4714 4715 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 4716 if (si && si->sin_addr.s_addr) 4717 ddst = si->sin_addr.s_addr; 4718 } 4719 4720 if (dst) *dst = ntohl(ddst); 4721 if (src) *src = ntohl(ssrc); 4722 } 4723 4724 /* 4725 * Set IP addresses. Must be called at splnet. 4726 * If an address is 0, leave it the way it is. 4727 */ 4728 static void 4729 sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr) 4730 { 4731 STDDCL; 4732 struct ifaddr *ifa; 4733 struct sockaddr_in *si; 4734 struct sockaddr_in *dest; 4735 4736 /* 4737 * Pick the first AF_INET address from the list, 4738 * aliases don't make any sense on a p2p link anyway. 4739 */ 4740 4741 si = 0; 4742 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4743 { 4744 if (ifa->ifa_addr->sa_family == AF_INET) 4745 { 4746 si = (struct sockaddr_in *)ifa->ifa_addr; 4747 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4748 if (si) 4749 break; 4750 } 4751 } 4752 4753 if (ifa && si) 4754 { 4755 int error; 4756 struct sockaddr_in new_sin = *si; 4757 struct sockaddr_in new_dst = *dest; 4758 4759 /* 4760 * Scrub old routes now instead of calling in_ifinit with 4761 * scrub=1, because we may change the dstaddr 4762 * before the call to in_ifinit. 4763 */ 4764 in_ifscrub(ifp, ifatoia(ifa)); 4765 4766 if (myaddr != 0) 4767 new_sin.sin_addr.s_addr = htonl(myaddr); 4768 if (hisaddr != 0) { 4769 new_dst.sin_addr.s_addr = htonl(hisaddr); 4770 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) { 4771 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 4772 *dest = new_dst; /* fix dstaddr in place */ 4773 } 4774 } 4775 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4776 if(debug && error) 4777 { 4778 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addrs: in_ifinit " 4779 " failed, error=%d\n", SPP_ARGS(ifp), error); 4780 } 4781 } 4782 } 4783 4784 /* 4785 * Clear IP addresses. Must be called at splnet. 4786 */ 4787 static void 4788 sppp_clear_ip_addrs(struct sppp *sp) 4789 { 4790 struct ifnet *ifp = &sp->pp_if; 4791 struct ifaddr *ifa; 4792 struct sockaddr_in *si; 4793 struct sockaddr_in *dest; 4794 4795 u_int32_t remote; 4796 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4797 remote = sp->ipcp.saved_hisaddr; 4798 else 4799 sppp_get_ip_addrs(sp, 0, &remote, 0); 4800 4801 /* 4802 * Pick the first AF_INET address from the list, 4803 * aliases don't make any sense on a p2p link anyway. 4804 */ 4805 4806 si = 0; 4807 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4808 { 4809 if (ifa->ifa_addr->sa_family == AF_INET) 4810 { 4811 si = (struct sockaddr_in *)ifa->ifa_addr; 4812 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4813 if (si) 4814 break; 4815 } 4816 } 4817 4818 if (ifa && si) 4819 { 4820 struct sockaddr_in new_sin = *si; 4821 4822 in_ifscrub(ifp, ifatoia(ifa)); 4823 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 4824 new_sin.sin_addr.s_addr = 0; 4825 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4826 /* replace peer addr in place */ 4827 dest->sin_addr.s_addr = sp->ipcp.saved_hisaddr; 4828 in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4829 } 4830 } 4831 4832 #ifdef INET6 4833 /* 4834 * Get both IPv6 addresses. 4835 */ 4836 static void 4837 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 4838 struct in6_addr *srcmask) 4839 { 4840 struct ifnet *ifp = &sp->pp_if; 4841 struct ifaddr *ifa; 4842 struct sockaddr_in6 *si, *sm; 4843 struct in6_addr ssrc, ddst; 4844 4845 sm = NULL; 4846 memset(&ssrc, 0, sizeof(ssrc)); 4847 memset(&ddst, 0, sizeof(ddst)); 4848 /* 4849 * Pick the first link-local AF_INET6 address from the list, 4850 * aliases don't make any sense on a p2p link anyway. 4851 */ 4852 si = 0; 4853 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4854 if (ifa->ifa_addr->sa_family == AF_INET6) { 4855 si = (struct sockaddr_in6 *)ifa->ifa_addr; 4856 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 4857 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 4858 break; 4859 } 4860 if (ifa) { 4861 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 4862 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc)); 4863 if (srcmask) { 4864 bcopy(&sm->sin6_addr, srcmask, 4865 sizeof(*srcmask)); 4866 } 4867 } 4868 4869 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 4870 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 4871 bcopy(&si->sin6_addr, &ddst, sizeof(ddst)); 4872 } 4873 4874 if (dst) 4875 bcopy(&ddst, dst, sizeof(*dst)); 4876 if (src) 4877 bcopy(&ssrc, src, sizeof(*src)); 4878 } 4879 4880 #ifdef IPV6CP_MYIFID_DYN 4881 /* 4882 * Generate random ifid. 4883 */ 4884 static void 4885 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 4886 { 4887 /* TBD */ 4888 } 4889 4890 /* 4891 * Set my IPv6 address. Must be called at splnet. 4892 */ 4893 static void 4894 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 4895 { 4896 STDDCL; 4897 struct ifaddr *ifa; 4898 struct sockaddr_in6 *sin6; 4899 4900 /* 4901 * Pick the first link-local AF_INET6 address from the list, 4902 * aliases don't make any sense on a p2p link anyway. 4903 */ 4904 4905 sin6 = NULL; 4906 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4907 { 4908 if (ifa->ifa_addr->sa_family == AF_INET6) 4909 { 4910 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 4911 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 4912 break; 4913 } 4914 } 4915 4916 if (ifa && sin6) 4917 { 4918 int error; 4919 struct sockaddr_in6 new_sin6 = *sin6; 4920 4921 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr)); 4922 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 4923 if (debug && error) 4924 { 4925 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit " 4926 " failed, error=%d\n", SPP_ARGS(ifp), error); 4927 } 4928 } 4929 } 4930 #endif 4931 4932 /* 4933 * Suggest a candidate address to be used by peer. 4934 */ 4935 static void 4936 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 4937 { 4938 struct in6_addr myaddr; 4939 struct timeval tv; 4940 4941 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4942 4943 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 4944 microtime(&tv); 4945 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 4946 myaddr.s6_addr[14] ^= 0xff; 4947 myaddr.s6_addr[15] ^= 0xff; 4948 } else { 4949 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 4950 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 4951 } 4952 if (suggest) 4953 bcopy(&myaddr, suggest, sizeof(myaddr)); 4954 } 4955 #endif /*INET6*/ 4956 4957 /* 4958 * Process ioctl requests specific to the PPP interface. 4959 * Permissions have already been checked. 4960 */ 4961 static int 4962 sppp_params(struct sppp *sp, int cmd, void *data) 4963 { 4964 switch (cmd) { 4965 case SPPPGETAUTHCFG: 4966 { 4967 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 4968 int error; 4969 size_t len; 4970 4971 cfg->myauthflags = sp->myauth.flags; 4972 cfg->hisauthflags = sp->hisauth.flags; 4973 strncpy(cfg->ifname, sp->pp_if.if_xname, IFNAMSIZ); 4974 cfg->hisauth = 0; 4975 if (sp->hisauth.proto) 4976 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4977 cfg->myauth = 0; 4978 if (sp->myauth.proto) 4979 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4980 if (cfg->myname_length == 0) { 4981 if (sp->myauth.name != NULL) 4982 cfg->myname_length = strlen(sp->myauth.name)+1; 4983 } else { 4984 if (sp->myauth.name == NULL) { 4985 cfg->myname_length = 0; 4986 } else { 4987 len = strlen(sp->myauth.name)+1; 4988 if (cfg->myname_length < len) 4989 return (ENAMETOOLONG); 4990 error = copyout(sp->myauth.name, cfg->myname, len); 4991 if (error) return error; 4992 } 4993 } 4994 if (cfg->hisname_length == 0) { 4995 if(sp->hisauth.name != NULL) 4996 cfg->hisname_length = strlen(sp->hisauth.name)+1; 4997 } else { 4998 if (sp->hisauth.name == NULL) { 4999 cfg->hisname_length = 0; 5000 } else { 5001 len = strlen(sp->hisauth.name)+1; 5002 if (cfg->hisname_length < len) 5003 return (ENAMETOOLONG); 5004 error = copyout(sp->hisauth.name, cfg->hisname, len); 5005 if (error) return error; 5006 } 5007 } 5008 } 5009 break; 5010 case SPPPSETAUTHCFG: 5011 { 5012 struct spppauthcfg *cfg = (struct spppauthcfg*)data; 5013 int error; 5014 5015 if (sp->myauth.name) { 5016 free(sp->myauth.name, M_DEVBUF); 5017 sp->myauth.name = NULL; 5018 } 5019 if (sp->myauth.secret) { 5020 free(sp->myauth.secret, M_DEVBUF); 5021 sp->myauth.secret = NULL; 5022 } 5023 if (sp->hisauth.name) { 5024 free(sp->hisauth.name, M_DEVBUF); 5025 sp->hisauth.name = NULL; 5026 } 5027 if (sp->hisauth.secret) { 5028 free(sp->hisauth.secret, M_DEVBUF); 5029 sp->hisauth.secret = NULL; 5030 } 5031 5032 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5033 if (cfg->hisname_length >= MCLBYTES) 5034 return (ENAMETOOLONG); 5035 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5036 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5037 if (error) { 5038 free(sp->hisauth.name, M_DEVBUF); 5039 sp->hisauth.name = NULL; 5040 return error; 5041 } 5042 sp->hisauth.name[cfg->hisname_length-1] = 0; 5043 } 5044 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5045 if (cfg->hissecret_length >= MCLBYTES) 5046 return (ENAMETOOLONG); 5047 sp->hisauth.secret = malloc(cfg->hissecret_length, M_DEVBUF, M_WAITOK); 5048 error = copyin(cfg->hissecret, sp->hisauth.secret, cfg->hissecret_length); 5049 if (error) { 5050 free(sp->hisauth.secret, M_DEVBUF); 5051 sp->hisauth.secret = NULL; 5052 return error; 5053 } 5054 sp->hisauth.secret[cfg->hissecret_length-1] = 0; 5055 } 5056 if (cfg->myname != NULL && cfg->myname_length > 0) { 5057 if (cfg->myname_length >= MCLBYTES) 5058 return (ENAMETOOLONG); 5059 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5060 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5061 if (error) { 5062 free(sp->myauth.name, M_DEVBUF); 5063 sp->myauth.name = NULL; 5064 return error; 5065 } 5066 sp->myauth.name[cfg->myname_length-1] = 0; 5067 } 5068 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5069 if (cfg->mysecret_length >= MCLBYTES) 5070 return (ENAMETOOLONG); 5071 sp->myauth.secret = malloc(cfg->mysecret_length, M_DEVBUF, M_WAITOK); 5072 error = copyin(cfg->mysecret, sp->myauth.secret, cfg->mysecret_length); 5073 if (error) { 5074 free(sp->myauth.secret, M_DEVBUF); 5075 sp->myauth.secret = NULL; 5076 return error; 5077 } 5078 sp->myauth.secret[cfg->mysecret_length-1] = 0; 5079 } 5080 sp->myauth.flags = cfg->myauthflags; 5081 if (cfg->myauth) 5082 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5083 sp->hisauth.flags = cfg->hisauthflags; 5084 if (cfg->hisauth) 5085 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5086 sp->pp_auth_failures = 0; 5087 } 5088 break; 5089 case SPPPGETLCPCFG: 5090 { 5091 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5092 lcp->lcp_timeout = sp->lcp.timeout; 5093 } 5094 break; 5095 case SPPPSETLCPCFG: 5096 { 5097 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5098 sp->lcp.timeout = lcp->lcp_timeout; 5099 } 5100 break; 5101 case SPPPGETSTATUS: 5102 { 5103 struct spppstatus *status = (struct spppstatus *)data; 5104 status->phase = sp->pp_phase; 5105 } 5106 break; 5107 case SPPPGETIDLETO: 5108 { 5109 struct spppidletimeout *to = (struct spppidletimeout *)data; 5110 to->idle_seconds = sp->pp_idle_timeout; 5111 } 5112 break; 5113 case SPPPSETIDLETO: 5114 { 5115 struct spppidletimeout *to = (struct spppidletimeout *)data; 5116 sp->pp_idle_timeout = to->idle_seconds; 5117 } 5118 break; 5119 case SPPPSETAUTHFAILURE: 5120 { 5121 struct spppauthfailuresettings *afsettings = (struct spppauthfailuresettings *)data; 5122 sp->pp_max_auth_fail = afsettings->max_failures; 5123 sp->pp_auth_failures = 0; 5124 } 5125 break; 5126 case SPPPGETAUTHFAILURES: 5127 { 5128 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5129 stats->auth_failures = sp->pp_auth_failures; 5130 stats->max_failures = sp->pp_max_auth_fail; 5131 } 5132 break; 5133 case SPPPSETDNSOPTS: 5134 { 5135 struct spppdnssettings *req = (struct spppdnssettings*)data; 5136 sp->query_dns = req->query_dns & 3; 5137 } 5138 break; 5139 case SPPPGETDNSOPTS: 5140 { 5141 struct spppdnssettings *req = (struct spppdnssettings*)data; 5142 req->query_dns = sp->query_dns; 5143 } 5144 break; 5145 case SPPPGETDNSADDRS: 5146 { 5147 struct spppdnsaddrs *addrs = (struct spppdnsaddrs*)data; 5148 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5149 } 5150 break; 5151 default: 5152 return (EINVAL); 5153 } 5154 5155 return (0); 5156 } 5157 5158 static void 5159 sppp_phase_network(struct sppp *sp) 5160 { 5161 STDDCL; 5162 int i; 5163 u_int32_t mask; 5164 5165 sp->pp_phase = SPPP_PHASE_NETWORK; 5166 5167 if(debug) 5168 { 5169 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 5170 sppp_phase_name(sp->pp_phase)); 5171 } 5172 5173 /* Notify NCPs now. */ 5174 for (i = 0; i < IDX_COUNT; i++) 5175 if ((cps[i])->flags & CP_NCP) 5176 (cps[i])->Open(sp); 5177 5178 /* Send Up events to all NCPs. */ 5179 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5180 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) 5181 (cps[i])->Up(sp); 5182 5183 /* if no NCP is starting, all this was in vain, close down */ 5184 sppp_lcp_check_and_close(sp); 5185 } 5186 5187 5188 static const char * 5189 sppp_cp_type_name(u_char type) 5190 { 5191 static char buf[12]; 5192 switch (type) { 5193 case CONF_REQ: return "conf-req"; 5194 case CONF_ACK: return "conf-ack"; 5195 case CONF_NAK: return "conf-nak"; 5196 case CONF_REJ: return "conf-rej"; 5197 case TERM_REQ: return "term-req"; 5198 case TERM_ACK: return "term-ack"; 5199 case CODE_REJ: return "code-rej"; 5200 case PROTO_REJ: return "proto-rej"; 5201 case ECHO_REQ: return "echo-req"; 5202 case ECHO_REPLY: return "echo-reply"; 5203 case DISC_REQ: return "discard-req"; 5204 } 5205 sprintf (buf, "0x%x", type); 5206 return buf; 5207 } 5208 5209 static const char * 5210 sppp_auth_type_name(u_short proto, u_char type) 5211 { 5212 static char buf[12]; 5213 switch (proto) { 5214 case PPP_CHAP: 5215 switch (type) { 5216 case CHAP_CHALLENGE: return "challenge"; 5217 case CHAP_RESPONSE: return "response"; 5218 case CHAP_SUCCESS: return "success"; 5219 case CHAP_FAILURE: return "failure"; 5220 } 5221 case PPP_PAP: 5222 switch (type) { 5223 case PAP_REQ: return "req"; 5224 case PAP_ACK: return "ack"; 5225 case PAP_NAK: return "nak"; 5226 } 5227 } 5228 sprintf (buf, "0x%x", type); 5229 return buf; 5230 } 5231 5232 static const char * 5233 sppp_lcp_opt_name(u_char opt) 5234 { 5235 static char buf[12]; 5236 switch (opt) { 5237 case LCP_OPT_MRU: return "mru"; 5238 case LCP_OPT_ASYNC_MAP: return "async-map"; 5239 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 5240 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 5241 case LCP_OPT_MAGIC: return "magic"; 5242 case LCP_OPT_PROTO_COMP: return "proto-comp"; 5243 case LCP_OPT_ADDR_COMP: return "addr-comp"; 5244 } 5245 sprintf (buf, "0x%x", opt); 5246 return buf; 5247 } 5248 5249 static const char * 5250 sppp_ipcp_opt_name(u_char opt) 5251 { 5252 static char buf[12]; 5253 switch (opt) { 5254 case IPCP_OPT_ADDRESSES: return "addresses"; 5255 case IPCP_OPT_COMPRESSION: return "compression"; 5256 case IPCP_OPT_ADDRESS: return "address"; 5257 } 5258 sprintf (buf, "0x%x", opt); 5259 return buf; 5260 } 5261 5262 #ifdef INET6 5263 static const char * 5264 sppp_ipv6cp_opt_name(u_char opt) 5265 { 5266 static char buf[12]; 5267 switch (opt) { 5268 case IPV6CP_OPT_IFID: return "ifid"; 5269 case IPV6CP_OPT_COMPRESSION: return "compression"; 5270 } 5271 sprintf (buf, "0x%x", opt); 5272 return buf; 5273 } 5274 #endif 5275 5276 static const char * 5277 sppp_state_name(int state) 5278 { 5279 switch (state) { 5280 case STATE_INITIAL: return "initial"; 5281 case STATE_STARTING: return "starting"; 5282 case STATE_CLOSED: return "closed"; 5283 case STATE_STOPPED: return "stopped"; 5284 case STATE_CLOSING: return "closing"; 5285 case STATE_STOPPING: return "stopping"; 5286 case STATE_REQ_SENT: return "req-sent"; 5287 case STATE_ACK_RCVD: return "ack-rcvd"; 5288 case STATE_ACK_SENT: return "ack-sent"; 5289 case STATE_OPENED: return "opened"; 5290 } 5291 return "illegal"; 5292 } 5293 5294 static const char * 5295 sppp_phase_name(int phase) 5296 { 5297 switch (phase) { 5298 case SPPP_PHASE_DEAD: return "dead"; 5299 case SPPP_PHASE_ESTABLISH: return "establish"; 5300 case SPPP_PHASE_TERMINATE: return "terminate"; 5301 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 5302 case SPPP_PHASE_NETWORK: return "network"; 5303 } 5304 return "illegal"; 5305 } 5306 5307 static const char * 5308 sppp_proto_name(u_short proto) 5309 { 5310 static char buf[12]; 5311 switch (proto) { 5312 case PPP_LCP: return "lcp"; 5313 case PPP_IPCP: return "ipcp"; 5314 case PPP_PAP: return "pap"; 5315 case PPP_CHAP: return "chap"; 5316 case PPP_IPV6CP: return "ipv6cp"; 5317 } 5318 sprintf(buf, "0x%x", (unsigned)proto); 5319 return buf; 5320 } 5321 5322 static void 5323 sppp_print_bytes(const u_char *p, u_short len) 5324 { 5325 addlog(" %02x", *p++); 5326 while (--len > 0) 5327 addlog("-%02x", *p++); 5328 } 5329 5330 static void 5331 sppp_print_string(const char *p, u_short len) 5332 { 5333 u_char c; 5334 5335 while (len-- > 0) { 5336 c = *p++; 5337 /* 5338 * Print only ASCII chars directly. RFC 1994 recommends 5339 * using only them, but we don't rely on it. */ 5340 if (c < ' ' || c > '~') 5341 addlog("\\x%x", c); 5342 else 5343 addlog("%c", c); 5344 } 5345 } 5346 5347 static const char * 5348 sppp_dotted_quad(u_int32_t addr) 5349 { 5350 static char s[16]; 5351 sprintf(s, "%d.%d.%d.%d", 5352 (int)((addr >> 24) & 0xff), 5353 (int)((addr >> 16) & 0xff), 5354 (int)((addr >> 8) & 0xff), 5355 (int)(addr & 0xff)); 5356 return s; 5357 } 5358 5359 /* a dummy, used to drop uninteresting events */ 5360 static void 5361 sppp_null(struct sppp *unused) 5362 { 5363 /* do just nothing */ 5364 } 5365 /* 5366 * This file is large. Tell emacs to highlight it nevertheless. 5367 * 5368 * Local Variables: 5369 * hilit-auto-highlight-maxout: 120000 5370 * End: 5371 */ 5372
Indexes created Fri Sep 26 08:10:20 GMT 2025