if_spppsubr.c revision 1.55
1 /* $NetBSD: if_spppsubr.c,v 1.55 2002/07/28 22:16:47 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 1.55 2002/07/28 22:16:47 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 #ifndef BROKEN_98 /* XXX - broken Win98 drivers INSIST on having an ASYNC_MAP */ 2280 p[2] = p[3] = p[4] = p[5] = 0; 2281 break; 2282 #else 2283 continue; 2284 #endif 2285 2286 case LCP_OPT_MRU: 2287 /* 2288 * Maximum receive unit. Always agreeable, 2289 * but ignored by now. 2290 */ 2291 sp->lcp.their_mru = p[2] * 256 + p[3]; 2292 if (debug) 2293 addlog(" %ld", sp->lcp.their_mru); 2294 continue; 2295 2296 case LCP_OPT_AUTH_PROTO: 2297 authproto = (p[2] << 8) + p[3]; 2298 if (sp->myauth.proto != authproto) { 2299 /* not agreed, nak */ 2300 if (debug) 2301 addlog(" [mine %s != his %s]", 2302 sppp_proto_name(sp->hisauth.proto), 2303 sppp_proto_name(authproto)); 2304 p[2] = sp->myauth.proto >> 8; 2305 p[3] = sp->myauth.proto; 2306 break; 2307 } 2308 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2309 if (debug) 2310 addlog(" [chap not MD5]"); 2311 p[4] = CHAP_MD5; 2312 break; 2313 } 2314 continue; 2315 } 2316 /* Add the option to nak'ed list. */ 2317 bcopy (p, r, p[1]); 2318 r += p[1]; 2319 rlen += p[1]; 2320 } 2321 if (rlen) { 2322 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2323 if (debug) 2324 addlog(" max_failure (%d) exceeded, " 2325 "send conf-rej\n", 2326 sp->lcp.max_failure); 2327 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2328 } else { 2329 if (debug) 2330 addlog(" send conf-nak\n"); 2331 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2332 } 2333 goto end; 2334 } else { 2335 if (debug) 2336 addlog(" send conf-ack\n"); 2337 sp->fail_counter[IDX_LCP] = 0; 2338 sp->pp_loopcnt = 0; 2339 sppp_cp_send (sp, PPP_LCP, CONF_ACK, 2340 h->ident, origlen, h+1); 2341 } 2342 2343 end: 2344 free (buf, M_TEMP); 2345 return (rlen == 0); 2346 } 2347 2348 /* 2349 * Analyze the LCP Configure-Reject option list, and adjust our 2350 * negotiation. 2351 */ 2352 static void 2353 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2354 { 2355 STDDCL; 2356 u_char *buf, *p; 2357 2358 len -= 4; 2359 buf = malloc (len, M_TEMP, M_NOWAIT); 2360 if (!buf) 2361 return; 2362 2363 if (debug) 2364 log(LOG_DEBUG, SPP_FMT "lcp rej opts:", 2365 SPP_ARGS(ifp)); 2366 2367 p = (void*) (h+1); 2368 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2369 if (debug) 2370 addlog(" %s", sppp_lcp_opt_name(*p)); 2371 switch (*p) { 2372 case LCP_OPT_MAGIC: 2373 /* Magic number -- can't use it, use 0 */ 2374 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2375 sp->lcp.magic = 0; 2376 break; 2377 case LCP_OPT_MRU: 2378 /* 2379 * Should not be rejected anyway, since we only 2380 * negotiate a MRU if explicitly requested by 2381 * peer. 2382 */ 2383 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2384 break; 2385 case LCP_OPT_AUTH_PROTO: 2386 /* 2387 * Peer doesn't want to authenticate himself, 2388 * deny unless this is a dialout call, and 2389 * SPPP_AUTHFLAG_NOCALLOUT is set. 2390 */ 2391 if ((sp->pp_flags & PP_CALLIN) == 0 && 2392 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2393 if (debug) 2394 addlog(" [don't insist on auth " 2395 "for callout]"); 2396 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2397 break; 2398 } 2399 if (debug) 2400 addlog("[access denied]\n"); 2401 lcp.Close(sp); 2402 break; 2403 } 2404 } 2405 if (debug) 2406 addlog("\n"); 2407 free (buf, M_TEMP); 2408 return; 2409 } 2410 2411 /* 2412 * Analyze the LCP Configure-NAK option list, and adjust our 2413 * negotiation. 2414 */ 2415 static void 2416 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2417 { 2418 STDDCL; 2419 u_char *buf, *p; 2420 u_int32_t magic; 2421 2422 len -= 4; 2423 buf = malloc (len, M_TEMP, M_NOWAIT); 2424 if (!buf) 2425 return; 2426 2427 if (debug) 2428 log(LOG_DEBUG, SPP_FMT "lcp nak opts:", 2429 SPP_ARGS(ifp)); 2430 2431 p = (void*) (h+1); 2432 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2433 if (debug) 2434 addlog(" %s", sppp_lcp_opt_name(*p)); 2435 switch (*p) { 2436 case LCP_OPT_MAGIC: 2437 /* Magic number -- renegotiate */ 2438 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2439 len >= 6 && p[1] == 6) { 2440 magic = (u_int32_t)p[2] << 24 | 2441 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2442 /* 2443 * If the remote magic is our negated one, 2444 * this looks like a loopback problem. 2445 * Suggest a new magic to make sure. 2446 */ 2447 if (magic == ~sp->lcp.magic) { 2448 if (debug) 2449 addlog(" magic glitch"); 2450 sp->lcp.magic = random(); 2451 } else { 2452 sp->lcp.magic = magic; 2453 if (debug) 2454 addlog(" %d", magic); 2455 } 2456 } 2457 break; 2458 case LCP_OPT_MRU: 2459 /* 2460 * Peer wants to advise us to negotiate an MRU. 2461 * Agree on it if it's reasonable, or use 2462 * default otherwise. 2463 */ 2464 if (len >= 4 && p[1] == 4) { 2465 u_int mru = p[2] * 256 + p[3]; 2466 if (debug) 2467 addlog(" %d", mru); 2468 if (mru < PP_MTU || mru > PP_MAX_MRU) 2469 mru = PP_MTU; 2470 sp->lcp.mru = mru; 2471 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2472 } 2473 break; 2474 case LCP_OPT_AUTH_PROTO: 2475 /* 2476 * Peer doesn't like our authentication method, 2477 * deny. 2478 */ 2479 if (debug) 2480 addlog("[access denied]\n"); 2481 lcp.Close(sp); 2482 break; 2483 } 2484 } 2485 if (debug) 2486 addlog("\n"); 2487 free (buf, M_TEMP); 2488 return; 2489 } 2490 2491 static void 2492 sppp_lcp_tlu(struct sppp *sp) 2493 { 2494 STDDCL; 2495 int i; 2496 u_int32_t mask; 2497 2498 /* XXX ? */ 2499 if (! (ifp->if_flags & IFF_UP) && 2500 (ifp->if_flags & IFF_RUNNING)) { 2501 /* Coming out of loopback mode. */ 2502 if_up(ifp); 2503 } 2504 2505 for (i = 0; i < IDX_COUNT; i++) 2506 if ((cps[i])->flags & CP_QUAL) 2507 (cps[i])->Open(sp); 2508 2509 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2510 (sp->pp_flags & PP_NEEDAUTH) != 0) 2511 sp->pp_phase = SPPP_PHASE_AUTHENTICATE; 2512 else 2513 sp->pp_phase = SPPP_PHASE_NETWORK; 2514 2515 if(debug) 2516 { 2517 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2518 sppp_phase_name(sp->pp_phase)); 2519 } 2520 2521 /* 2522 * Open all authentication protocols. This is even required 2523 * if we already proceeded to network phase, since it might be 2524 * that remote wants us to authenticate, so we might have to 2525 * send a PAP request. Undesired authentication protocols 2526 * don't do anything when they get an Open event. 2527 */ 2528 for (i = 0; i < IDX_COUNT; i++) 2529 if ((cps[i])->flags & CP_AUTH) 2530 (cps[i])->Open(sp); 2531 2532 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2533 /* Notify all NCPs. */ 2534 for (i = 0; i < IDX_COUNT; i++) 2535 if ((cps[i])->flags & CP_NCP) 2536 (cps[i])->Open(sp); 2537 } 2538 2539 /* Send Up events to all started protos. */ 2540 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2541 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) 2542 (cps[i])->Up(sp); 2543 2544 /* notify low-level driver of state change */ 2545 if (sp->pp_chg) 2546 sp->pp_chg(sp, (int)sp->pp_phase); 2547 2548 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2549 /* if no NCP is starting, close down */ 2550 sppp_lcp_check_and_close(sp); 2551 } 2552 2553 static void 2554 sppp_lcp_tld(struct sppp *sp) 2555 { 2556 STDDCL; 2557 int i; 2558 u_int32_t mask; 2559 2560 sp->pp_phase = SPPP_PHASE_TERMINATE; 2561 2562 if(debug) 2563 { 2564 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2565 sppp_phase_name(sp->pp_phase)); 2566 } 2567 2568 /* 2569 * Take upper layers down. We send the Down event first and 2570 * the Close second to prevent the upper layers from sending 2571 * ``a flurry of terminate-request packets'', as the RFC 2572 * describes it. 2573 */ 2574 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2575 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2576 (cps[i])->Down(sp); 2577 (cps[i])->Close(sp); 2578 } 2579 } 2580 2581 static void 2582 sppp_lcp_tls(struct sppp *sp) 2583 { 2584 STDDCL; 2585 2586 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2587 printf("%s: authentication failed %d times, not retrying again\n", 2588 sp->pp_if.if_xname, sp->pp_auth_failures); 2589 if_down(&sp->pp_if); 2590 return; 2591 } 2592 2593 sp->pp_phase = SPPP_PHASE_ESTABLISH; 2594 2595 if(debug) 2596 { 2597 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2598 sppp_phase_name(sp->pp_phase)); 2599 } 2600 2601 /* Notify lower layer if desired. */ 2602 if (sp->pp_tls) 2603 (sp->pp_tls)(sp); 2604 } 2605 2606 static void 2607 sppp_lcp_tlf(struct sppp *sp) 2608 { 2609 STDDCL; 2610 2611 sp->pp_phase = SPPP_PHASE_DEAD; 2612 2613 if(debug) 2614 { 2615 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2616 sppp_phase_name(sp->pp_phase)); 2617 } 2618 2619 /* Notify lower layer if desired. */ 2620 if (sp->pp_tlf) 2621 (sp->pp_tlf)(sp); 2622 } 2623 2624 static void 2625 sppp_lcp_scr(struct sppp *sp) 2626 { 2627 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2628 int i = 0; 2629 u_short authproto; 2630 2631 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2632 if (! sp->lcp.magic) 2633 sp->lcp.magic = random(); 2634 opt[i++] = LCP_OPT_MAGIC; 2635 opt[i++] = 6; 2636 opt[i++] = sp->lcp.magic >> 24; 2637 opt[i++] = sp->lcp.magic >> 16; 2638 opt[i++] = sp->lcp.magic >> 8; 2639 opt[i++] = sp->lcp.magic; 2640 } 2641 2642 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2643 opt[i++] = LCP_OPT_MRU; 2644 opt[i++] = 4; 2645 opt[i++] = sp->lcp.mru >> 8; 2646 opt[i++] = sp->lcp.mru; 2647 } 2648 2649 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2650 authproto = sp->hisauth.proto; 2651 opt[i++] = LCP_OPT_AUTH_PROTO; 2652 opt[i++] = authproto == PPP_CHAP? 5: 4; 2653 opt[i++] = authproto >> 8; 2654 opt[i++] = authproto; 2655 if (authproto == PPP_CHAP) 2656 opt[i++] = CHAP_MD5; 2657 } 2658 2659 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2660 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2661 } 2662 2663 /* 2664 * Check the open NCPs, return true if at least one NCP is open. 2665 */ 2666 static int 2667 sppp_ncp_check(struct sppp *sp) 2668 { 2669 int i, mask; 2670 2671 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2672 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2673 return 1; 2674 return 0; 2675 } 2676 2677 /* 2678 * Re-check the open NCPs and see if we should terminate the link. 2679 * Called by the NCPs during their tlf action handling. 2680 */ 2681 static void 2682 sppp_lcp_check_and_close(struct sppp *sp) 2683 { 2684 2685 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2686 /* don't bother, we are already going down */ 2687 return; 2688 2689 if (sppp_ncp_check(sp)) 2690 return; 2691 2692 lcp.Close(sp); 2693 } 2694 2695 2696 /* 2697 *--------------------------------------------------------------------------* 2698 * * 2699 * The IPCP implementation. * 2700 * * 2701 *--------------------------------------------------------------------------* 2702 */ 2703 2704 static void 2705 sppp_ipcp_init(struct sppp *sp) 2706 { 2707 sp->ipcp.opts = 0; 2708 sp->ipcp.flags = 0; 2709 sp->state[IDX_IPCP] = STATE_INITIAL; 2710 sp->fail_counter[IDX_IPCP] = 0; 2711 sp->pp_seq[IDX_IPCP] = 0; 2712 sp->pp_rseq[IDX_IPCP] = 0; 2713 callout_init(&sp->ch[IDX_IPCP]); 2714 } 2715 2716 static void 2717 sppp_ipcp_up(struct sppp *sp) 2718 { 2719 sppp_up_event(&ipcp, sp); 2720 } 2721 2722 static void 2723 sppp_ipcp_down(struct sppp *sp) 2724 { 2725 sppp_down_event(&ipcp, sp); 2726 } 2727 2728 static void 2729 sppp_ipcp_open(struct sppp *sp) 2730 { 2731 STDDCL; 2732 u_int32_t myaddr, hisaddr; 2733 2734 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 2735 sp->ipcp.req_myaddr = 0; 2736 sp->ipcp.req_hisaddr = 0; 2737 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 2738 2739 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 2740 /* 2741 * If we don't have his address, this probably means our 2742 * interface doesn't want to talk IP at all. (This could 2743 * be the case if somebody wants to speak only IPX, for 2744 * example.) Don't open IPCP in this case. 2745 */ 2746 if (hisaddr == 0L) { 2747 /* XXX this message should go away */ 2748 if (debug) 2749 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n", 2750 SPP_ARGS(ifp)); 2751 return; 2752 } 2753 2754 if (myaddr == 0) { 2755 /* 2756 * I don't have an assigned address, so i need to 2757 * negotiate my address. 2758 */ 2759 sp->ipcp.flags |= IPCP_MYADDR_DYN; 2760 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2761 } 2762 if (hisaddr == 1) { 2763 /* 2764 * XXX - remove this hack! 2765 * remote has no valid adress, we need to get one assigned. 2766 */ 2767 sp->ipcp.flags |= IPCP_HISADDR_DYN; 2768 } 2769 sppp_open_event(&ipcp, sp); 2770 } 2771 2772 static void 2773 sppp_ipcp_close(struct sppp *sp) 2774 { 2775 sppp_close_event(&ipcp, sp); 2776 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 2777 /* 2778 * Some address was dynamic, clear it again. 2779 */ 2780 sppp_clear_ip_addrs(sp); 2781 } 2782 2783 static void 2784 sppp_ipcp_TO(void *cookie) 2785 { 2786 sppp_to_event(&ipcp, (struct sppp *)cookie); 2787 } 2788 2789 /* 2790 * Analyze a configure request. Return true if it was agreeable, and 2791 * caused action sca, false if it has been rejected or nak'ed, and 2792 * caused action scn. (The return value is used to make the state 2793 * transition decision in the state automaton.) 2794 */ 2795 static int 2796 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2797 { 2798 u_char *buf, *r, *p; 2799 struct ifnet *ifp = &sp->pp_if; 2800 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 2801 u_int32_t hisaddr, desiredaddr; 2802 2803 len -= 4; 2804 origlen = len; 2805 /* 2806 * Make sure to allocate a buf that can at least hold a 2807 * conf-nak with an `address' option. We might need it below. 2808 */ 2809 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 2810 if (! buf) 2811 return (0); 2812 2813 /* pass 1: see if we can recognize them */ 2814 if (debug) 2815 log(LOG_DEBUG, SPP_FMT "ipcp parse opts:", 2816 SPP_ARGS(ifp)); 2817 p = (void*) (h+1); 2818 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2819 if (debug) 2820 addlog(" %s", sppp_ipcp_opt_name(*p)); 2821 switch (*p) { 2822 #ifdef notyet 2823 case IPCP_OPT_COMPRESSION: 2824 if (len >= 6 && p[1] >= 6) { 2825 /* correctly formed compress option */ 2826 continue; 2827 } 2828 if (debug) 2829 addlog(" [invalid]"); 2830 break; 2831 #endif 2832 case IPCP_OPT_ADDRESS: 2833 if (len >= 6 && p[1] == 6) { 2834 /* correctly formed address option */ 2835 continue; 2836 } 2837 if (debug) 2838 addlog(" [invalid]"); 2839 break; 2840 default: 2841 /* Others not supported. */ 2842 if (debug) 2843 addlog(" [rej]"); 2844 break; 2845 } 2846 /* Add the option to rejected list. */ 2847 bcopy (p, r, p[1]); 2848 r += p[1]; 2849 rlen += p[1]; 2850 } 2851 if (rlen) { 2852 if (debug) 2853 addlog(" send conf-rej\n"); 2854 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 2855 goto end; 2856 } else if (debug) 2857 addlog("\n"); 2858 2859 /* pass 2: parse option values */ 2860 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 2861 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 2862 else 2863 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 2864 if (debug) 2865 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ", 2866 SPP_ARGS(ifp)); 2867 p = (void*) (h+1); 2868 len = origlen; 2869 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2870 if (debug) 2871 addlog(" %s", sppp_ipcp_opt_name(*p)); 2872 switch (*p) { 2873 #ifdef notyet 2874 case IPCP_OPT_COMPRESSION: 2875 continue; 2876 #endif 2877 case IPCP_OPT_ADDRESS: 2878 desiredaddr = p[2] << 24 | p[3] << 16 | 2879 p[4] << 8 | p[5]; 2880 if (desiredaddr == hisaddr || 2881 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 2882 /* 2883 * Peer's address is same as our value, 2884 * this is agreeable. Gonna conf-ack 2885 * it. 2886 */ 2887 if (debug) 2888 addlog(" %s [ack]", 2889 sppp_dotted_quad(hisaddr)); 2890 /* record that we've seen it already */ 2891 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 2892 sp->ipcp.req_hisaddr = desiredaddr; 2893 hisaddr = desiredaddr; 2894 continue; 2895 } 2896 /* 2897 * The address wasn't agreeable. This is either 2898 * he sent us 0.0.0.0, asking to assign him an 2899 * address, or he send us another address not 2900 * matching our value. Either case, we gonna 2901 * conf-nak it with our value. 2902 */ 2903 if (debug) { 2904 if (desiredaddr == 0) 2905 addlog(" [addr requested]"); 2906 else 2907 addlog(" %s [not agreed]", 2908 sppp_dotted_quad(desiredaddr)); 2909 } 2910 2911 p[2] = hisaddr >> 24; 2912 p[3] = hisaddr >> 16; 2913 p[4] = hisaddr >> 8; 2914 p[5] = hisaddr; 2915 break; 2916 } 2917 /* Add the option to nak'ed list. */ 2918 bcopy (p, r, p[1]); 2919 r += p[1]; 2920 rlen += p[1]; 2921 } 2922 2923 /* 2924 * If we are about to conf-ack the request, but haven't seen 2925 * his address so far, gonna conf-nak it instead, with the 2926 * `address' option present and our idea of his address being 2927 * filled in there, to request negotiation of both addresses. 2928 * 2929 * XXX This can result in an endless req - nak loop if peer 2930 * doesn't want to send us his address. Q: What should we do 2931 * about it? XXX A: implement the max-failure counter. 2932 */ 2933 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 2934 buf[0] = IPCP_OPT_ADDRESS; 2935 buf[1] = 6; 2936 buf[2] = hisaddr >> 24; 2937 buf[3] = hisaddr >> 16; 2938 buf[4] = hisaddr >> 8; 2939 buf[5] = hisaddr; 2940 rlen = 6; 2941 if (debug) 2942 addlog(" still need hisaddr"); 2943 } 2944 2945 if (rlen) { 2946 if (debug) 2947 addlog(" send conf-nak\n"); 2948 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 2949 } else { 2950 if (debug) 2951 addlog(" send conf-ack\n"); 2952 sppp_cp_send (sp, PPP_IPCP, CONF_ACK, 2953 h->ident, origlen, h+1); 2954 } 2955 2956 end: 2957 free (buf, M_TEMP); 2958 return (rlen == 0); 2959 } 2960 2961 /* 2962 * Analyze the IPCP Configure-Reject option list, and adjust our 2963 * negotiation. 2964 */ 2965 static void 2966 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2967 { 2968 u_char *buf, *p; 2969 struct ifnet *ifp = &sp->pp_if; 2970 int debug = ifp->if_flags & IFF_DEBUG; 2971 2972 len -= 4; 2973 buf = malloc (len, M_TEMP, M_NOWAIT); 2974 if (!buf) 2975 return; 2976 2977 if (debug) 2978 log(LOG_DEBUG, SPP_FMT "ipcp rej opts:", 2979 SPP_ARGS(ifp)); 2980 2981 p = (void*) (h+1); 2982 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2983 if (debug) 2984 addlog(" %s", sppp_ipcp_opt_name(*p)); 2985 switch (*p) { 2986 case IPCP_OPT_ADDRESS: 2987 /* 2988 * Peer doesn't grok address option. This is 2989 * bad. XXX Should we better give up here? 2990 */ 2991 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 2992 break; 2993 #ifdef notyet 2994 case IPCP_OPT_COMPRESS: 2995 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 2996 break; 2997 #endif 2998 } 2999 } 3000 if (debug) 3001 addlog("\n"); 3002 free (buf, M_TEMP); 3003 return; 3004 } 3005 3006 /* 3007 * Analyze the IPCP Configure-NAK option list, and adjust our 3008 * negotiation. 3009 */ 3010 static void 3011 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3012 { 3013 u_char *p; 3014 struct ifnet *ifp = &sp->pp_if; 3015 int debug = ifp->if_flags & IFF_DEBUG; 3016 u_int32_t wantaddr; 3017 3018 len -= 4; 3019 3020 if (debug) 3021 log(LOG_DEBUG, SPP_FMT "ipcp nak opts:", 3022 SPP_ARGS(ifp)); 3023 3024 p = (void*) (h+1); 3025 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3026 if (debug) 3027 addlog(" %s", sppp_ipcp_opt_name(*p)); 3028 switch (*p) { 3029 case IPCP_OPT_ADDRESS: 3030 /* 3031 * Peer doesn't like our local IP address. See 3032 * if we can do something for him. We'll drop 3033 * him our address then. 3034 */ 3035 if (len >= 6 && p[1] == 6) { 3036 wantaddr = p[2] << 24 | p[3] << 16 | 3037 p[4] << 8 | p[5]; 3038 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3039 if (debug) 3040 addlog(" [wantaddr %s]", 3041 sppp_dotted_quad(wantaddr)); 3042 /* 3043 * When doing dynamic address assignment, 3044 * we accept his offer. Otherwise, we 3045 * ignore it and thus continue to negotiate 3046 * our already existing value. 3047 */ 3048 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3049 if (debug) 3050 addlog(" [agree]"); 3051 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3052 sp->ipcp.req_myaddr = wantaddr; 3053 } 3054 } 3055 break; 3056 3057 case IPCP_OPT_PRIMDNS: 3058 if (len >= 6 && p[1] == 6) { 3059 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3060 p[4] << 8 | p[5]; 3061 } 3062 break; 3063 3064 case IPCP_OPT_SECDNS: 3065 if (len >= 6 && p[1] == 6) { 3066 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3067 p[4] << 8 | p[5]; 3068 } 3069 break; 3070 #ifdef notyet 3071 case IPCP_OPT_COMPRESS: 3072 /* 3073 * Peer wants different compression parameters. 3074 */ 3075 break; 3076 #endif 3077 } 3078 } 3079 if (debug) 3080 addlog("\n"); 3081 return; 3082 } 3083 3084 static void 3085 sppp_ipcp_tlu(struct sppp *sp) 3086 { 3087 /* we are up. Set addresses and notify anyone interested */ 3088 u_int32_t myaddr, hisaddr; 3089 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3090 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 3091 myaddr = sp->ipcp.req_myaddr; 3092 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 3093 hisaddr = sp->ipcp.req_hisaddr; 3094 sppp_set_ip_addrs(sp, myaddr, hisaddr); 3095 if (sp->pp_con) 3096 sp->pp_con(sp); 3097 } 3098 3099 static void 3100 sppp_ipcp_tld(struct sppp *sp) 3101 { 3102 } 3103 3104 static void 3105 sppp_ipcp_tls(struct sppp *sp) 3106 { 3107 /* indicate to LCP that it must stay alive */ 3108 sp->lcp.protos |= (1 << IDX_IPCP); 3109 } 3110 3111 static void 3112 sppp_ipcp_tlf(struct sppp *sp) 3113 { 3114 /* we no longer need LCP */ 3115 sp->lcp.protos &= ~(1 << IDX_IPCP); 3116 } 3117 3118 static void 3119 sppp_ipcp_scr(struct sppp *sp) 3120 { 3121 char opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3122 u_int32_t ouraddr; 3123 int i = 0; 3124 3125 #ifdef notyet 3126 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3127 opt[i++] = IPCP_OPT_COMPRESSION; 3128 opt[i++] = 6; 3129 opt[i++] = 0; /* VJ header compression */ 3130 opt[i++] = 0x2d; /* VJ header compression */ 3131 opt[i++] = max_slot_id; 3132 opt[i++] = comp_slot_id; 3133 } 3134 #endif 3135 3136 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3137 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3138 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3139 else 3140 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3141 opt[i++] = IPCP_OPT_ADDRESS; 3142 opt[i++] = 6; 3143 opt[i++] = ouraddr >> 24; 3144 opt[i++] = ouraddr >> 16; 3145 opt[i++] = ouraddr >> 8; 3146 opt[i++] = ouraddr; 3147 } 3148 3149 if (sp->query_dns & 1) { 3150 opt[i++] = IPCP_OPT_PRIMDNS; 3151 opt[i++] = 6; 3152 opt[i++] = sp->dns_addrs[0] >> 24; 3153 opt[i++] = sp->dns_addrs[0] >> 16; 3154 opt[i++] = sp->dns_addrs[0] >> 8; 3155 opt[i++] = sp->dns_addrs[0]; 3156 } 3157 if (sp->query_dns & 2) { 3158 opt[i++] = IPCP_OPT_SECDNS; 3159 opt[i++] = 6; 3160 opt[i++] = sp->dns_addrs[1] >> 24; 3161 opt[i++] = sp->dns_addrs[1] >> 16; 3162 opt[i++] = sp->dns_addrs[1] >> 8; 3163 opt[i++] = sp->dns_addrs[1]; 3164 } 3165 3166 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3167 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3168 } 3169 3170 3171 /* 3172 *--------------------------------------------------------------------------* 3173 * * 3174 * The IPv6CP implementation. * 3175 * * 3176 *--------------------------------------------------------------------------* 3177 */ 3178 3179 #ifdef INET6 3180 static void 3181 sppp_ipv6cp_init(struct sppp *sp) 3182 { 3183 sp->ipv6cp.opts = 0; 3184 sp->ipv6cp.flags = 0; 3185 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3186 sp->fail_counter[IDX_IPV6CP] = 0; 3187 sp->pp_seq[IDX_IPV6CP] = 0; 3188 sp->pp_rseq[IDX_IPV6CP] = 0; 3189 callout_init(&sp->ch[IDX_IPV6CP]); 3190 } 3191 3192 static void 3193 sppp_ipv6cp_up(struct sppp *sp) 3194 { 3195 sppp_up_event(&ipv6cp, sp); 3196 } 3197 3198 static void 3199 sppp_ipv6cp_down(struct sppp *sp) 3200 { 3201 sppp_down_event(&ipv6cp, sp); 3202 } 3203 3204 static void 3205 sppp_ipv6cp_open(struct sppp *sp) 3206 { 3207 STDDCL; 3208 struct in6_addr myaddr, hisaddr; 3209 3210 #ifdef IPV6CP_MYIFID_DYN 3211 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3212 #else 3213 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3214 #endif 3215 3216 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3217 /* 3218 * If we don't have our address, this probably means our 3219 * interface doesn't want to talk IPv6 at all. (This could 3220 * be the case if somebody wants to speak only IPX, for 3221 * example.) Don't open IPv6CP in this case. 3222 */ 3223 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3224 /* XXX this message should go away */ 3225 if (debug) 3226 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n", 3227 SPP_ARGS(ifp)); 3228 return; 3229 } 3230 3231 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3232 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3233 sppp_open_event(&ipv6cp, sp); 3234 } 3235 3236 static void 3237 sppp_ipv6cp_close(struct sppp *sp) 3238 { 3239 sppp_close_event(&ipv6cp, sp); 3240 } 3241 3242 static void 3243 sppp_ipv6cp_TO(void *cookie) 3244 { 3245 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3246 } 3247 3248 /* 3249 * Analyze a configure request. Return true if it was agreeable, and 3250 * caused action sca, false if it has been rejected or nak'ed, and 3251 * caused action scn. (The return value is used to make the state 3252 * transition decision in the state automaton.) 3253 */ 3254 static int 3255 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3256 { 3257 u_char *buf, *r, *p; 3258 struct ifnet *ifp = &sp->pp_if; 3259 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3260 struct in6_addr myaddr, desiredaddr, suggestaddr; 3261 int ifidcount; 3262 int type; 3263 int collision, nohisaddr; 3264 3265 len -= 4; 3266 origlen = len; 3267 /* 3268 * Make sure to allocate a buf that can at least hold a 3269 * conf-nak with an `address' option. We might need it below. 3270 */ 3271 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 3272 if (! buf) 3273 return (0); 3274 3275 /* pass 1: see if we can recognize them */ 3276 if (debug) 3277 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:", 3278 SPP_ARGS(ifp)); 3279 p = (void*) (h+1); 3280 ifidcount = 0; 3281 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3282 if (debug) 3283 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3284 switch (*p) { 3285 case IPV6CP_OPT_IFID: 3286 if (len >= 10 && p[1] == 10 && ifidcount == 0) { 3287 /* correctly formed address option */ 3288 ifidcount++; 3289 continue; 3290 } 3291 if (debug) 3292 addlog(" [invalid]"); 3293 break; 3294 #ifdef notyet 3295 case IPV6CP_OPT_COMPRESSION: 3296 if (len >= 4 && p[1] >= 4) { 3297 /* correctly formed compress option */ 3298 continue; 3299 } 3300 if (debug) 3301 addlog(" [invalid]"); 3302 break; 3303 #endif 3304 default: 3305 /* Others not supported. */ 3306 if (debug) 3307 addlog(" [rej]"); 3308 break; 3309 } 3310 /* Add the option to rejected list. */ 3311 bcopy (p, r, p[1]); 3312 r += p[1]; 3313 rlen += p[1]; 3314 } 3315 if (rlen) { 3316 if (debug) 3317 addlog(" send conf-rej\n"); 3318 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3319 goto end; 3320 } else if (debug) 3321 addlog("\n"); 3322 3323 /* pass 2: parse option values */ 3324 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3325 if (debug) 3326 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ", 3327 SPP_ARGS(ifp)); 3328 p = (void*) (h+1); 3329 len = origlen; 3330 type = CONF_ACK; 3331 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3332 if (debug) 3333 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3334 switch (*p) { 3335 #ifdef notyet 3336 case IPV6CP_OPT_COMPRESSION: 3337 continue; 3338 #endif 3339 case IPV6CP_OPT_IFID: 3340 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3341 bcopy(&p[2], &desiredaddr.s6_addr[8], 8); 3342 collision = (memcmp(&desiredaddr.s6_addr[8], 3343 &myaddr.s6_addr[8], 8) == 0); 3344 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3345 3346 desiredaddr.s6_addr16[0] = htons(0xfe80); 3347 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3348 3349 if (!collision && !nohisaddr) { 3350 /* no collision, hisaddr known - Conf-Ack */ 3351 type = CONF_ACK; 3352 3353 if (debug) { 3354 addlog(" %s [%s]", 3355 ip6_sprintf(&desiredaddr), 3356 sppp_cp_type_name(type)); 3357 } 3358 continue; 3359 } 3360 3361 memset(&suggestaddr, 0, sizeof(&suggestaddr)); 3362 if (collision && nohisaddr) { 3363 /* collision, hisaddr unknown - Conf-Rej */ 3364 type = CONF_REJ; 3365 memset(&p[2], 0, 8); 3366 } else { 3367 /* 3368 * - no collision, hisaddr unknown, or 3369 * - collision, hisaddr known 3370 * Conf-Nak, suggest hisaddr 3371 */ 3372 type = CONF_NAK; 3373 sppp_suggest_ip6_addr(sp, &suggestaddr); 3374 bcopy(&suggestaddr.s6_addr[8], &p[2], 8); 3375 } 3376 if (debug) 3377 addlog(" %s [%s]", ip6_sprintf(&desiredaddr), 3378 sppp_cp_type_name(type)); 3379 break; 3380 } 3381 /* Add the option to nak'ed list. */ 3382 bcopy (p, r, p[1]); 3383 r += p[1]; 3384 rlen += p[1]; 3385 } 3386 3387 if (rlen == 0 && type == CONF_ACK) { 3388 if (debug) 3389 addlog(" send %s\n", sppp_cp_type_name(type)); 3390 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1); 3391 } else { 3392 #ifdef notdef 3393 if (type == CONF_ACK) 3394 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3395 #endif 3396 3397 if (debug) { 3398 addlog(" send %s suggest %s\n", 3399 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); 3400 } 3401 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3402 } 3403 3404 end: 3405 free (buf, M_TEMP); 3406 return (rlen == 0); 3407 } 3408 3409 /* 3410 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3411 * negotiation. 3412 */ 3413 static void 3414 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3415 { 3416 u_char *buf, *p; 3417 struct ifnet *ifp = &sp->pp_if; 3418 int debug = ifp->if_flags & IFF_DEBUG; 3419 3420 len -= 4; 3421 buf = malloc (len, M_TEMP, M_NOWAIT); 3422 if (!buf) 3423 return; 3424 3425 if (debug) 3426 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:", 3427 SPP_ARGS(ifp)); 3428 3429 p = (void*) (h+1); 3430 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3431 if (debug) 3432 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3433 switch (*p) { 3434 case IPV6CP_OPT_IFID: 3435 /* 3436 * Peer doesn't grok address option. This is 3437 * bad. XXX Should we better give up here? 3438 */ 3439 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3440 break; 3441 #ifdef notyet 3442 case IPV6CP_OPT_COMPRESS: 3443 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3444 break; 3445 #endif 3446 } 3447 } 3448 if (debug) 3449 addlog("\n"); 3450 free (buf, M_TEMP); 3451 return; 3452 } 3453 3454 /* 3455 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3456 * negotiation. 3457 */ 3458 static void 3459 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3460 { 3461 u_char *buf, *p; 3462 struct ifnet *ifp = &sp->pp_if; 3463 int debug = ifp->if_flags & IFF_DEBUG; 3464 struct in6_addr suggestaddr; 3465 3466 len -= 4; 3467 buf = malloc (len, M_TEMP, M_NOWAIT); 3468 if (!buf) 3469 return; 3470 3471 if (debug) 3472 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:", 3473 SPP_ARGS(ifp)); 3474 3475 p = (void*) (h+1); 3476 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3477 if (debug) 3478 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3479 switch (*p) { 3480 case IPV6CP_OPT_IFID: 3481 /* 3482 * Peer doesn't like our local ifid. See 3483 * if we can do something for him. We'll drop 3484 * him our address then. 3485 */ 3486 if (len < 10 || p[1] != 10) 3487 break; 3488 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3489 suggestaddr.s6_addr16[0] = htons(0xfe80); 3490 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3491 bcopy(&p[2], &suggestaddr.s6_addr[8], 8); 3492 3493 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3494 if (debug) 3495 addlog(" [suggestaddr %s]", 3496 ip6_sprintf(&suggestaddr)); 3497 #ifdef IPV6CP_MYIFID_DYN 3498 /* 3499 * When doing dynamic address assignment, 3500 * we accept his offer. 3501 */ 3502 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3503 struct in6_addr lastsuggest; 3504 /* 3505 * If <suggested myaddr from peer> equals to 3506 * <hisaddr we have suggested last time>, 3507 * we have a collision. generate new random 3508 * ifid. 3509 */ 3510 sppp_suggest_ip6_addr(&lastsuggest); 3511 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3512 lastsuggest)) { 3513 if (debug) 3514 addlog(" [random]"); 3515 sppp_gen_ip6_addr(sp, &suggestaddr); 3516 } 3517 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3518 if (debug) 3519 addlog(" [agree]"); 3520 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3521 } 3522 #else 3523 /* 3524 * Since we do not do dynamic address assignment, 3525 * we ignore it and thus continue to negotiate 3526 * our already existing value. This can possibly 3527 * go into infinite request-reject loop. 3528 * 3529 * This is not likely because we normally use 3530 * ifid based on MAC-address. 3531 * If you have no ethernet card on the node, too bad. 3532 * XXX should we use fail_counter? 3533 */ 3534 #endif 3535 break; 3536 #ifdef notyet 3537 case IPV6CP_OPT_COMPRESS: 3538 /* 3539 * Peer wants different compression parameters. 3540 */ 3541 break; 3542 #endif 3543 } 3544 } 3545 if (debug) 3546 addlog("\n"); 3547 free (buf, M_TEMP); 3548 return; 3549 } 3550 3551 static void 3552 sppp_ipv6cp_tlu(struct sppp *sp) 3553 { 3554 /* we are up - notify isdn daemon */ 3555 if (sp->pp_con) 3556 sp->pp_con(sp); 3557 } 3558 3559 static void 3560 sppp_ipv6cp_tld(struct sppp *sp) 3561 { 3562 } 3563 3564 static void 3565 sppp_ipv6cp_tls(struct sppp *sp) 3566 { 3567 /* indicate to LCP that it must stay alive */ 3568 sp->lcp.protos |= (1 << IDX_IPV6CP); 3569 } 3570 3571 static void 3572 sppp_ipv6cp_tlf(struct sppp *sp) 3573 { 3574 /* we no longer need LCP */ 3575 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3576 } 3577 3578 static void 3579 sppp_ipv6cp_scr(struct sppp *sp) 3580 { 3581 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3582 struct in6_addr ouraddr; 3583 int i = 0; 3584 3585 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3586 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3587 opt[i++] = IPV6CP_OPT_IFID; 3588 opt[i++] = 10; 3589 bcopy(&ouraddr.s6_addr[8], &opt[i], 8); 3590 i += 8; 3591 } 3592 3593 #ifdef notyet 3594 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3595 opt[i++] = IPV6CP_OPT_COMPRESSION; 3596 opt[i++] = 4; 3597 opt[i++] = 0; /* TBD */ 3598 opt[i++] = 0; /* TBD */ 3599 /* variable length data may follow */ 3600 } 3601 #endif 3602 3603 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3604 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 3605 } 3606 #else /*INET6*/ 3607 static void sppp_ipv6cp_init(struct sppp *sp) 3608 { 3609 } 3610 3611 static void sppp_ipv6cp_up(struct sppp *sp) 3612 { 3613 } 3614 3615 static void sppp_ipv6cp_down(struct sppp *sp) 3616 { 3617 } 3618 3619 3620 static void sppp_ipv6cp_open(struct sppp *sp) 3621 { 3622 } 3623 3624 static void sppp_ipv6cp_close(struct sppp *sp) 3625 { 3626 } 3627 3628 static void sppp_ipv6cp_TO(void *sp) 3629 { 3630 } 3631 3632 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3633 { 3634 return 0; 3635 } 3636 3637 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3638 { 3639 } 3640 3641 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3642 { 3643 } 3644 3645 static void sppp_ipv6cp_tlu(struct sppp *sp) 3646 { 3647 } 3648 3649 static void sppp_ipv6cp_tld(struct sppp *sp) 3650 { 3651 } 3652 3653 static void sppp_ipv6cp_tls(struct sppp *sp) 3654 { 3655 } 3656 3657 static void sppp_ipv6cp_tlf(struct sppp *sp) 3658 { 3659 } 3660 3661 static void sppp_ipv6cp_scr(struct sppp *sp) 3662 { 3663 } 3664 #endif /*INET6*/ 3665 3666 3667 /* 3668 *--------------------------------------------------------------------------* 3669 * * 3670 * The CHAP implementation. * 3671 * * 3672 *--------------------------------------------------------------------------* 3673 */ 3674 3675 /* 3676 * The authentication protocols don't employ a full-fledged state machine as 3677 * the control protocols do, since they do have Open and Close events, but 3678 * not Up and Down, nor are they explicitly terminated. Also, use of the 3679 * authentication protocols may be different in both directions (this makes 3680 * sense, think of a machine that never accepts incoming calls but only 3681 * calls out, it doesn't require the called party to authenticate itself). 3682 * 3683 * Our state machine for the local authentication protocol (we are requesting 3684 * the peer to authenticate) looks like: 3685 * 3686 * RCA- 3687 * +--------------------------------------------+ 3688 * V scn,tld| 3689 * +--------+ Close +---------+ RCA+ 3690 * | |<----------------------------------| |------+ 3691 * +--->| Closed | TO* | Opened | sca | 3692 * | | |-----+ +-------| |<-----+ 3693 * | +--------+ irc | | +---------+ 3694 * | ^ | | ^ 3695 * | | | | | 3696 * | | | | | 3697 * | TO-| | | | 3698 * | |tld TO+ V | | 3699 * | | +------->+ | | 3700 * | | | | | | 3701 * | +--------+ V | | 3702 * | | |<----+<--------------------+ | 3703 * | | Req- | scr | 3704 * | | Sent | | 3705 * | | | | 3706 * | +--------+ | 3707 * | RCA- | | RCA+ | 3708 * +------+ +------------------------------------------+ 3709 * scn,tld sca,irc,ict,tlu 3710 * 3711 * 3712 * with: 3713 * 3714 * Open: LCP reached authentication phase 3715 * Close: LCP reached terminate phase 3716 * 3717 * RCA+: received reply (pap-req, chap-response), acceptable 3718 * RCN: received reply (pap-req, chap-response), not acceptable 3719 * TO+: timeout with restart counter >= 0 3720 * TO-: timeout with restart counter < 0 3721 * TO*: reschedule timeout for CHAP 3722 * 3723 * scr: send request packet (none for PAP, chap-challenge) 3724 * sca: send ack packet (pap-ack, chap-success) 3725 * scn: send nak packet (pap-nak, chap-failure) 3726 * ict: initialize re-challenge timer (CHAP only) 3727 * 3728 * tlu: this-layer-up, LCP reaches network phase 3729 * tld: this-layer-down, LCP enters terminate phase 3730 * 3731 * Note that in CHAP mode, after sending a new challenge, while the state 3732 * automaton falls back into Req-Sent state, it doesn't signal a tld 3733 * event to LCP, so LCP remains in network phase. Only after not getting 3734 * any response (or after getting an unacceptable response), CHAP closes, 3735 * causing LCP to enter terminate phase. 3736 * 3737 * With PAP, there is no initial request that can be sent. The peer is 3738 * expected to send one based on the successful negotiation of PAP as 3739 * the authentication protocol during the LCP option negotiation. 3740 * 3741 * Incoming authentication protocol requests (remote requests 3742 * authentication, we are peer) don't employ a state machine at all, 3743 * they are simply answered. Some peers [Ascend P50 firmware rev 3744 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 3745 * still in authentication phase (thereby violating the standard that 3746 * demands that these NCP packets are to be discarded), so we keep 3747 * track of the peer demanding us to authenticate, and only proceed to 3748 * phase network once we've seen a positive acknowledge for the 3749 * authentication. 3750 */ 3751 3752 /* 3753 * Handle incoming CHAP packets. 3754 */ 3755 void 3756 sppp_chap_input(struct sppp *sp, struct mbuf *m) 3757 { 3758 STDDCL; 3759 struct lcp_header *h; 3760 int len, x; 3761 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 3762 int value_len, name_len; 3763 MD5_CTX ctx; 3764 3765 len = m->m_pkthdr.len; 3766 if (len < 4) { 3767 if (debug) 3768 log(LOG_DEBUG, 3769 SPP_FMT "chap invalid packet length: %d bytes\n", 3770 SPP_ARGS(ifp), len); 3771 return; 3772 } 3773 h = mtod (m, struct lcp_header*); 3774 if (len > ntohs (h->len)) 3775 len = ntohs (h->len); 3776 3777 switch (h->type) { 3778 /* challenge, failure and success are his authproto */ 3779 case CHAP_CHALLENGE: 3780 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 3781 /* can't do anything usefull */ 3782 sp->pp_auth_failures++; 3783 printf(SPP_FMT "chap input without my name and my secret being set\n", 3784 SPP_ARGS(ifp)); 3785 break; 3786 } 3787 value = 1 + (u_char*)(h+1); 3788 value_len = value[-1]; 3789 name = value + value_len; 3790 name_len = len - value_len - 5; 3791 if (name_len < 0) { 3792 if (debug) { 3793 log(LOG_DEBUG, 3794 SPP_FMT "chap corrupted challenge " 3795 "<%s id=0x%x len=%d", 3796 SPP_ARGS(ifp), 3797 sppp_auth_type_name(PPP_CHAP, h->type), 3798 h->ident, ntohs(h->len)); 3799 if (len > 4) 3800 sppp_print_bytes((u_char*) (h+1), len-4); 3801 addlog(">\n"); 3802 } 3803 break; 3804 } 3805 3806 if (debug) { 3807 log(LOG_DEBUG, 3808 SPP_FMT "chap input <%s id=0x%x len=%d name=", 3809 SPP_ARGS(ifp), 3810 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 3811 ntohs(h->len)); 3812 sppp_print_string((char*) name, name_len); 3813 addlog(" value-size=%d value=", value_len); 3814 sppp_print_bytes(value, value_len); 3815 addlog(">\n"); 3816 } 3817 3818 /* Compute reply value. */ 3819 MD5Init(&ctx); 3820 MD5Update(&ctx, &h->ident, 1); 3821 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 3822 MD5Update(&ctx, value, value_len); 3823 MD5Final(digest, &ctx); 3824 dsize = sizeof digest; 3825 3826 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 3827 sizeof dsize, (const char *)&dsize, 3828 sizeof digest, digest, 3829 sp->myauth.name_len, 3830 sp->myauth.name, 3831 0); 3832 break; 3833 3834 case CHAP_SUCCESS: 3835 if (debug) { 3836 log(LOG_DEBUG, SPP_FMT "chap success", 3837 SPP_ARGS(ifp)); 3838 if (len > 4) { 3839 addlog(": "); 3840 sppp_print_string((char*)(h + 1), len - 4); 3841 } 3842 addlog("\n"); 3843 } 3844 x = splnet(); 3845 sp->pp_auth_failures = 0; 3846 sp->pp_flags &= ~PP_NEEDAUTH; 3847 if (sp->myauth.proto == PPP_CHAP && 3848 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 3849 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 3850 /* 3851 * We are authenticator for CHAP but didn't 3852 * complete yet. Leave it to tlu to proceed 3853 * to network phase. 3854 */ 3855 splx(x); 3856 break; 3857 } 3858 splx(x); 3859 sppp_phase_network(sp); 3860 break; 3861 3862 case CHAP_FAILURE: 3863 x = splnet(); 3864 sp->pp_auth_failures++; 3865 splx(x); 3866 if (debug) { 3867 log(LOG_INFO, SPP_FMT "chap failure", 3868 SPP_ARGS(ifp)); 3869 if (len > 4) { 3870 addlog(": "); 3871 sppp_print_string((char*)(h + 1), len - 4); 3872 } 3873 addlog("\n"); 3874 } else 3875 log(LOG_INFO, SPP_FMT "chap failure\n", 3876 SPP_ARGS(ifp)); 3877 /* await LCP shutdown by authenticator */ 3878 break; 3879 3880 /* response is my authproto */ 3881 case CHAP_RESPONSE: 3882 if (sp->hisauth.secret == NULL) { 3883 /* can't do anything usefull */ 3884 printf(SPP_FMT "chap input without his secret being set\n", 3885 SPP_ARGS(ifp)); 3886 break; 3887 } 3888 value = 1 + (u_char*)(h+1); 3889 value_len = value[-1]; 3890 name = value + value_len; 3891 name_len = len - value_len - 5; 3892 if (name_len < 0) { 3893 if (debug) { 3894 log(LOG_DEBUG, 3895 SPP_FMT "chap corrupted response " 3896 "<%s id=0x%x len=%d", 3897 SPP_ARGS(ifp), 3898 sppp_auth_type_name(PPP_CHAP, h->type), 3899 h->ident, ntohs(h->len)); 3900 if (len > 4) 3901 sppp_print_bytes((u_char*)(h+1), len-4); 3902 addlog(">\n"); 3903 } 3904 break; 3905 } 3906 if (h->ident != sp->confid[IDX_CHAP]) { 3907 if (debug) 3908 log(LOG_DEBUG, 3909 SPP_FMT "chap dropping response for old ID " 3910 "(got %d, expected %d)\n", 3911 SPP_ARGS(ifp), 3912 h->ident, sp->confid[IDX_CHAP]); 3913 break; 3914 } 3915 if (sp->hisauth.name != NULL && 3916 (name_len != sp->hisauth.name_len 3917 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 3918 log(LOG_INFO, SPP_FMT "chap response, his name ", 3919 SPP_ARGS(ifp)); 3920 sppp_print_string(name, name_len); 3921 addlog(" != expected "); 3922 sppp_print_string(sp->hisauth.name, 3923 sp->hisauth.name_len); 3924 addlog("\n"); 3925 goto chap_failure; 3926 } 3927 if (debug) { 3928 log(LOG_DEBUG, SPP_FMT "chap input(%s) " 3929 "<%s id=0x%x len=%d name=", 3930 SPP_ARGS(ifp), 3931 sppp_state_name(sp->state[IDX_CHAP]), 3932 sppp_auth_type_name(PPP_CHAP, h->type), 3933 h->ident, ntohs (h->len)); 3934 sppp_print_string((char*)name, name_len); 3935 addlog(" value-size=%d value=", value_len); 3936 sppp_print_bytes(value, value_len); 3937 addlog(">\n"); 3938 } 3939 if (value_len != sizeof(sp->myauth.challenge)) { 3940 if (debug) 3941 log(LOG_DEBUG, 3942 SPP_FMT "chap bad hash value length: " 3943 "%d bytes, should be %ld\n", 3944 SPP_ARGS(ifp), value_len, 3945 (long) sizeof(sp->myauth.challenge)); 3946 goto chap_failure; 3947 } 3948 3949 MD5Init(&ctx); 3950 MD5Update(&ctx, &h->ident, 1); 3951 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 3952 MD5Update(&ctx, sp->myauth.challenge, sizeof(sp->myauth.challenge)); 3953 MD5Final(digest, &ctx); 3954 3955 #define FAILMSG "Failed..." 3956 #define SUCCMSG "Welcome!" 3957 3958 if (value_len != sizeof digest || 3959 memcmp(digest, value, value_len) != 0) { 3960 chap_failure: 3961 /* action scn, tld */ 3962 x = splnet(); 3963 sp->pp_auth_failures++; 3964 splx(x); 3965 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 3966 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 3967 0); 3968 chap.tld(sp); 3969 break; 3970 } 3971 sp->pp_auth_failures = 0; 3972 /* action sca, perhaps tlu */ 3973 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 3974 sp->state[IDX_CHAP] == STATE_OPENED) 3975 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 3976 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 3977 0); 3978 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 3979 sppp_cp_change_state(&chap, sp, STATE_OPENED); 3980 chap.tlu(sp); 3981 } 3982 break; 3983 3984 default: 3985 /* Unknown CHAP packet type -- ignore. */ 3986 if (debug) { 3987 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) " 3988 "<0x%x id=0x%xh len=%d", 3989 SPP_ARGS(ifp), 3990 sppp_state_name(sp->state[IDX_CHAP]), 3991 h->type, h->ident, ntohs(h->len)); 3992 if (len > 4) 3993 sppp_print_bytes((u_char*)(h+1), len-4); 3994 addlog(">\n"); 3995 } 3996 break; 3997 3998 } 3999 } 4000 4001 static void 4002 sppp_chap_init(struct sppp *sp) 4003 { 4004 /* Chap doesn't have STATE_INITIAL at all. */ 4005 sp->state[IDX_CHAP] = STATE_CLOSED; 4006 sp->fail_counter[IDX_CHAP] = 0; 4007 sp->pp_seq[IDX_CHAP] = 0; 4008 sp->pp_rseq[IDX_CHAP] = 0; 4009 callout_init(&sp->ch[IDX_CHAP]); 4010 } 4011 4012 static void 4013 sppp_chap_open(struct sppp *sp) 4014 { 4015 if (sp->myauth.proto == PPP_CHAP && 4016 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4017 /* we are authenticator for CHAP, start it */ 4018 chap.scr(sp); 4019 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4020 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4021 } 4022 /* nothing to be done if we are peer, await a challenge */ 4023 } 4024 4025 static void 4026 sppp_chap_close(struct sppp *sp) 4027 { 4028 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4029 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4030 } 4031 4032 static void 4033 sppp_chap_TO(void *cookie) 4034 { 4035 struct sppp *sp = (struct sppp *)cookie; 4036 STDDCL; 4037 int s; 4038 4039 s = splnet(); 4040 if (debug) 4041 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n", 4042 SPP_ARGS(ifp), 4043 sppp_state_name(sp->state[IDX_CHAP]), 4044 sp->rst_counter[IDX_CHAP]); 4045 4046 if (--sp->rst_counter[IDX_CHAP] < 0) 4047 /* TO- event */ 4048 switch (sp->state[IDX_CHAP]) { 4049 case STATE_REQ_SENT: 4050 chap.tld(sp); 4051 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4052 break; 4053 } 4054 else 4055 /* TO+ (or TO*) event */ 4056 switch (sp->state[IDX_CHAP]) { 4057 case STATE_OPENED: 4058 /* TO* event */ 4059 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4060 /* fall through */ 4061 case STATE_REQ_SENT: 4062 chap.scr(sp); 4063 /* sppp_cp_change_state() will restart the timer */ 4064 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4065 break; 4066 } 4067 4068 splx(s); 4069 } 4070 4071 static void 4072 sppp_chap_tlu(struct sppp *sp) 4073 { 4074 STDDCL; 4075 int i, x; 4076 4077 i = 0; 4078 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4079 4080 /* 4081 * Some broken CHAP implementations (Conware CoNet, firmware 4082 * 4.0.?) don't want to re-authenticate their CHAP once the 4083 * initial challenge-response exchange has taken place. 4084 * Provide for an option to avoid rechallenges. 4085 */ 4086 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4087 /* 4088 * Compute the re-challenge timeout. This will yield 4089 * a number between 300 and 810 seconds. 4090 */ 4091 i = 300 + ((unsigned)(random() & 0xff00) >> 7); 4092 4093 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4094 } 4095 4096 if (debug) { 4097 log(LOG_DEBUG, 4098 SPP_FMT "chap %s, ", 4099 SPP_ARGS(ifp), 4100 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4101 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4102 addlog("next re-challenge in %d seconds\n", i); 4103 else 4104 addlog("re-challenging supressed\n"); 4105 } 4106 4107 x = splnet(); 4108 sp->pp_auth_failures = 0; 4109 /* indicate to LCP that we need to be closed down */ 4110 sp->lcp.protos |= (1 << IDX_CHAP); 4111 4112 if (sp->pp_flags & PP_NEEDAUTH) { 4113 /* 4114 * Remote is authenticator, but his auth proto didn't 4115 * complete yet. Defer the transition to network 4116 * phase. 4117 */ 4118 splx(x); 4119 return; 4120 } 4121 splx(x); 4122 4123 /* 4124 * If we are already in phase network, we are done here. This 4125 * is the case if this is a dummy tlu event after a re-challenge. 4126 */ 4127 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4128 sppp_phase_network(sp); 4129 } 4130 4131 static void 4132 sppp_chap_tld(struct sppp *sp) 4133 { 4134 STDDCL; 4135 4136 if (debug) 4137 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp)); 4138 callout_stop(&sp->ch[IDX_CHAP]); 4139 sp->lcp.protos &= ~(1 << IDX_CHAP); 4140 4141 lcp.Close(sp); 4142 } 4143 4144 static void 4145 sppp_chap_scr(struct sppp *sp) 4146 { 4147 struct timeval tv; 4148 u_int32_t *ch, seed; 4149 u_char clen; 4150 4151 if (sp->myauth.name == NULL) { 4152 /* can't do anything usefull */ 4153 printf(SPP_FMT "chap starting without my name being set\n", 4154 SPP_ARGS(&sp->pp_if)); 4155 return; 4156 } 4157 4158 /* Compute random challenge. */ 4159 ch = (u_int32_t *)sp->myauth.challenge; 4160 microtime(&tv); 4161 seed = tv.tv_sec ^ tv.tv_usec; 4162 ch[0] = seed ^ random(); 4163 ch[1] = seed ^ random(); 4164 ch[2] = seed ^ random(); 4165 ch[3] = seed ^ random(); 4166 clen = 16; /* 4 * sizeof(u_int32_t) */ 4167 4168 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4169 4170 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4171 sizeof clen, (const char *)&clen, 4172 sizeof(sp->myauth.challenge), sp->myauth.challenge, 4173 sp->myauth.name_len, 4174 sp->myauth.name, 4175 0); 4176 } 4177 4178 /* 4179 *--------------------------------------------------------------------------* 4180 * * 4181 * The PAP implementation. * 4182 * * 4183 *--------------------------------------------------------------------------* 4184 */ 4185 /* 4186 * For PAP, we need to keep a little state also if we are the peer, not the 4187 * authenticator. This is since we don't get a request to authenticate, but 4188 * have to repeatedly authenticate ourself until we got a response (or the 4189 * retry counter is expired). 4190 */ 4191 4192 /* 4193 * Handle incoming PAP packets. */ 4194 static void 4195 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4196 { 4197 STDDCL; 4198 struct lcp_header *h; 4199 int len, x; 4200 u_char mlen; 4201 char *name, *secret; 4202 int name_len, secret_len; 4203 4204 len = m->m_pkthdr.len; 4205 if (len < 5) { 4206 if (debug) 4207 log(LOG_DEBUG, 4208 SPP_FMT "pap invalid packet length: %d bytes\n", 4209 SPP_ARGS(ifp), len); 4210 return; 4211 } 4212 h = mtod (m, struct lcp_header*); 4213 if (len > ntohs (h->len)) 4214 len = ntohs (h->len); 4215 switch (h->type) { 4216 /* PAP request is my authproto */ 4217 case PAP_REQ: 4218 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4219 /* can't do anything usefull */ 4220 printf(SPP_FMT "pap request without his name and his secret being set\n", 4221 SPP_ARGS(ifp)); 4222 break; 4223 } 4224 name = 1 + (u_char*)(h+1); 4225 name_len = name[-1]; 4226 secret = name + name_len + 1; 4227 if (name_len > len - 6 || 4228 (secret_len = secret[-1]) > len - 6 - name_len) { 4229 if (debug) { 4230 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4231 "<%s id=0x%x len=%d", 4232 SPP_ARGS(ifp), 4233 sppp_auth_type_name(PPP_PAP, h->type), 4234 h->ident, ntohs(h->len)); 4235 if (len > 4) 4236 sppp_print_bytes((u_char*)(h+1), len-4); 4237 addlog(">\n"); 4238 } 4239 break; 4240 } 4241 if (debug) { 4242 log(LOG_DEBUG, SPP_FMT "pap input(%s) " 4243 "<%s id=0x%x len=%d name=", 4244 SPP_ARGS(ifp), 4245 sppp_state_name(sp->state[IDX_PAP]), 4246 sppp_auth_type_name(PPP_PAP, h->type), 4247 h->ident, ntohs(h->len)); 4248 sppp_print_string((char*)name, name_len); 4249 addlog(" secret="); 4250 sppp_print_string((char*)secret, secret_len); 4251 addlog(">\n"); 4252 } 4253 if (name_len != sp->hisauth.name_len || 4254 secret_len != sp->hisauth.secret_len || 4255 memcmp(name, sp->hisauth.name, name_len) != 0 || 4256 memcmp(secret, sp->hisauth.secret, secret_len) != 0) { 4257 /* action scn, tld */ 4258 sp->pp_auth_failures++; 4259 mlen = sizeof(FAILMSG) - 1; 4260 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4261 sizeof mlen, (const char *)&mlen, 4262 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 4263 0); 4264 pap.tld(sp); 4265 break; 4266 } 4267 /* action sca, perhaps tlu */ 4268 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4269 sp->state[IDX_PAP] == STATE_OPENED) { 4270 mlen = sizeof(SUCCMSG) - 1; 4271 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4272 sizeof mlen, (const char *)&mlen, 4273 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 4274 0); 4275 } 4276 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4277 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4278 pap.tlu(sp); 4279 } 4280 break; 4281 4282 /* ack and nak are his authproto */ 4283 case PAP_ACK: 4284 callout_stop(&sp->pap_my_to_ch); 4285 if (debug) { 4286 log(LOG_DEBUG, SPP_FMT "pap success", 4287 SPP_ARGS(ifp)); 4288 name_len = *(char *)h; 4289 if (len > 5 && name_len) { 4290 addlog(": "); 4291 sppp_print_string((char*)(h+1), name_len); 4292 } 4293 addlog("\n"); 4294 } 4295 x = splnet(); 4296 sp->pp_auth_failures = 0; 4297 sp->pp_flags &= ~PP_NEEDAUTH; 4298 if (sp->myauth.proto == PPP_PAP && 4299 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4300 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4301 /* 4302 * We are authenticator for PAP but didn't 4303 * complete yet. Leave it to tlu to proceed 4304 * to network phase. 4305 */ 4306 splx(x); 4307 break; 4308 } 4309 splx(x); 4310 sppp_phase_network(sp); 4311 break; 4312 4313 case PAP_NAK: 4314 callout_stop(&sp->pap_my_to_ch); 4315 sp->pp_auth_failures++; 4316 if (debug) { 4317 log(LOG_INFO, SPP_FMT "pap failure", 4318 SPP_ARGS(ifp)); 4319 name_len = *(char *)h; 4320 if (len > 5 && name_len) { 4321 addlog(": "); 4322 sppp_print_string((char*)(h+1), name_len); 4323 } 4324 addlog("\n"); 4325 } else 4326 log(LOG_INFO, SPP_FMT "pap failure\n", 4327 SPP_ARGS(ifp)); 4328 /* await LCP shutdown by authenticator */ 4329 break; 4330 4331 default: 4332 /* Unknown PAP packet type -- ignore. */ 4333 if (debug) { 4334 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4335 "<0x%x id=0x%x len=%d", 4336 SPP_ARGS(ifp), 4337 h->type, h->ident, ntohs(h->len)); 4338 if (len > 4) 4339 sppp_print_bytes((u_char*)(h+1), len-4); 4340 addlog(">\n"); 4341 } 4342 break; 4343 4344 } 4345 } 4346 4347 static void 4348 sppp_pap_init(struct sppp *sp) 4349 { 4350 /* PAP doesn't have STATE_INITIAL at all. */ 4351 sp->state[IDX_PAP] = STATE_CLOSED; 4352 sp->fail_counter[IDX_PAP] = 0; 4353 sp->pp_seq[IDX_PAP] = 0; 4354 sp->pp_rseq[IDX_PAP] = 0; 4355 callout_init(&sp->ch[IDX_PAP]); 4356 callout_init(&sp->pap_my_to_ch); 4357 } 4358 4359 static void 4360 sppp_pap_open(struct sppp *sp) 4361 { 4362 if (sp->hisauth.proto == PPP_PAP && 4363 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4364 /* we are authenticator for PAP, start our timer */ 4365 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4366 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4367 } 4368 if (sp->myauth.proto == PPP_PAP) { 4369 /* we are peer, send a request, and start a timer */ 4370 pap.scr(sp); 4371 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4372 sppp_pap_my_TO, sp); 4373 } 4374 } 4375 4376 static void 4377 sppp_pap_close(struct sppp *sp) 4378 { 4379 if (sp->state[IDX_PAP] != STATE_CLOSED) 4380 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4381 } 4382 4383 /* 4384 * That's the timeout routine if we are authenticator. Since the 4385 * authenticator is basically passive in PAP, we can't do much here. 4386 */ 4387 static void 4388 sppp_pap_TO(void *cookie) 4389 { 4390 struct sppp *sp = (struct sppp *)cookie; 4391 STDDCL; 4392 int s; 4393 4394 s = splnet(); 4395 if (debug) 4396 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n", 4397 SPP_ARGS(ifp), 4398 sppp_state_name(sp->state[IDX_PAP]), 4399 sp->rst_counter[IDX_PAP]); 4400 4401 if (--sp->rst_counter[IDX_PAP] < 0) 4402 /* TO- event */ 4403 switch (sp->state[IDX_PAP]) { 4404 case STATE_REQ_SENT: 4405 pap.tld(sp); 4406 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4407 break; 4408 } 4409 else 4410 /* TO+ event, not very much we could do */ 4411 switch (sp->state[IDX_PAP]) { 4412 case STATE_REQ_SENT: 4413 /* sppp_cp_change_state() will restart the timer */ 4414 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4415 break; 4416 } 4417 4418 splx(s); 4419 } 4420 4421 /* 4422 * That's the timeout handler if we are peer. Since the peer is active, 4423 * we need to retransmit our PAP request since it is apparently lost. 4424 * XXX We should impose a max counter. 4425 */ 4426 static void 4427 sppp_pap_my_TO(void *cookie) 4428 { 4429 struct sppp *sp = (struct sppp *)cookie; 4430 STDDCL; 4431 4432 if (debug) 4433 log(LOG_DEBUG, SPP_FMT "pap peer TO\n", 4434 SPP_ARGS(ifp)); 4435 4436 pap.scr(sp); 4437 } 4438 4439 static void 4440 sppp_pap_tlu(struct sppp *sp) 4441 { 4442 STDDCL; 4443 int x; 4444 4445 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4446 4447 if (debug) 4448 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 4449 SPP_ARGS(ifp), pap.name); 4450 4451 x = splnet(); 4452 sp->pp_auth_failures = 0; 4453 /* indicate to LCP that we need to be closed down */ 4454 sp->lcp.protos |= (1 << IDX_PAP); 4455 4456 if (sp->pp_flags & PP_NEEDAUTH) { 4457 /* 4458 * Remote is authenticator, but his auth proto didn't 4459 * complete yet. Defer the transition to network 4460 * phase. 4461 */ 4462 splx(x); 4463 return; 4464 } 4465 splx(x); 4466 sppp_phase_network(sp); 4467 } 4468 4469 static void 4470 sppp_pap_tld(struct sppp *sp) 4471 { 4472 STDDCL; 4473 4474 if (debug) 4475 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp)); 4476 callout_stop(&sp->ch[IDX_PAP]); 4477 callout_stop(&sp->pap_my_to_ch); 4478 sp->lcp.protos &= ~(1 << IDX_PAP); 4479 4480 lcp.Close(sp); 4481 } 4482 4483 static void 4484 sppp_pap_scr(struct sppp *sp) 4485 { 4486 u_char idlen, pwdlen; 4487 4488 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4489 /* can't do anything usefull */ 4490 printf(SPP_FMT "pap starting without my name and secret being set\n", 4491 SPP_ARGS(&sp->pp_if)); 4492 return; 4493 } 4494 4495 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4496 pwdlen = sp->myauth.secret_len; 4497 idlen = sp->myauth.name_len; 4498 4499 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4500 sizeof idlen, (const char *)&idlen, 4501 idlen, sp->myauth.name, 4502 sizeof pwdlen, (const char *)&pwdlen, 4503 pwdlen, sp->myauth.secret, 4504 0); 4505 } 4506 4507 /* 4508 * Random miscellaneous functions. 4509 */ 4510 4511 /* 4512 * Send a PAP or CHAP proto packet. 4513 * 4514 * Varadic function, each of the elements for the ellipsis is of type 4515 * ``size_t mlen, const u_char *msg''. Processing will stop iff 4516 * mlen == 0. 4517 * NOTE: never declare variadic functions with types subject to type 4518 * promotion (i.e. u_char). This is asking for big trouble depending 4519 * on the architecture you are on... 4520 */ 4521 4522 static void 4523 sppp_auth_send(const struct cp *cp, struct sppp *sp, 4524 unsigned int type, unsigned int id, 4525 ...) 4526 { 4527 STDDCL; 4528 struct lcp_header *lh; 4529 struct mbuf *m; 4530 u_char *p; 4531 int len; 4532 size_t pkthdrlen; 4533 unsigned int mlen; 4534 const char *msg; 4535 va_list ap; 4536 4537 MGETHDR (m, M_DONTWAIT, MT_DATA); 4538 if (! m) 4539 return; 4540 m->m_pkthdr.rcvif = 0; 4541 4542 if (sp->pp_flags & PP_NOFRAMING) { 4543 *mtod(m, u_int16_t*) = htons(cp->proto); 4544 pkthdrlen = 2; 4545 lh = (struct lcp_header*)(mtod(m, u_int8_t*)+2); 4546 } else { 4547 struct ppp_header *h; 4548 h = mtod (m, struct ppp_header*); 4549 h->address = PPP_ALLSTATIONS; /* broadcast address */ 4550 h->control = PPP_UI; /* Unnumbered Info */ 4551 h->protocol = htons(cp->proto); 4552 pkthdrlen = PPP_HEADER_LEN; 4553 4554 lh = (struct lcp_header*)(h + 1); 4555 } 4556 4557 lh->type = type; 4558 lh->ident = id; 4559 p = (u_char*) (lh+1); 4560 4561 va_start(ap, id); 4562 len = 0; 4563 4564 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 4565 msg = va_arg(ap, const char *); 4566 len += mlen; 4567 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 4568 va_end(ap); 4569 m_freem(m); 4570 return; 4571 } 4572 4573 bcopy(msg, p, mlen); 4574 p += mlen; 4575 } 4576 va_end(ap); 4577 4578 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 4579 lh->len = htons (LCP_HEADER_LEN + len); 4580 4581 if (debug) { 4582 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 4583 SPP_ARGS(ifp), cp->name, 4584 sppp_auth_type_name(cp->proto, lh->type), 4585 lh->ident, ntohs(lh->len)); 4586 if (len) 4587 sppp_print_bytes((u_char*) (lh+1), len); 4588 addlog(">\n"); 4589 } 4590 if (IF_QFULL (&sp->pp_cpq)) { 4591 IF_DROP (&sp->pp_fastq); 4592 IF_DROP (&ifp->if_snd); 4593 m_freem (m); 4594 ++ifp->if_oerrors; 4595 return; 4596 } else 4597 IF_ENQUEUE (&sp->pp_cpq, m); 4598 if (! (ifp->if_flags & IFF_OACTIVE)) 4599 (*ifp->if_start) (ifp); 4600 ifp->if_obytes += m->m_pkthdr.len + 3; 4601 } 4602 4603 /* 4604 * Send keepalive packets, every 10 seconds. 4605 */ 4606 static void 4607 sppp_keepalive(void *dummy) 4608 { 4609 struct sppp *sp; 4610 int s; 4611 time_t now; 4612 4613 s = splnet(); 4614 now = mono_time.tv_sec; 4615 for (sp=spppq; sp; sp=sp->pp_next) { 4616 struct ifnet *ifp = &sp->pp_if; 4617 4618 /* check idle timeout */ 4619 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 4620 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 4621 /* idle timeout is enabled for this interface */ 4622 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 4623 if (ifp->if_flags & IFF_DEBUG) 4624 printf("%s: no activitiy for %lu seconds\n", 4625 sp->pp_if.if_xname, 4626 (unsigned long)(now-sp->pp_last_activity)); 4627 lcp.Close(sp); 4628 continue; 4629 } 4630 } 4631 4632 /* Keepalive mode disabled or channel down? */ 4633 if (! (sp->pp_flags & PP_KEEPALIVE) || 4634 ! (ifp->if_flags & IFF_RUNNING)) 4635 continue; 4636 4637 /* No keepalive in PPP mode if LCP not opened yet. */ 4638 if (! (sp->pp_flags & PP_CISCO) && 4639 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) 4640 continue; 4641 4642 if (sp->pp_alivecnt == MAXALIVECNT) { 4643 /* No keepalive packets got. Stop the interface. */ 4644 if_down (ifp); 4645 IF_PURGE (&sp->pp_cpq); 4646 if (! (sp->pp_flags & PP_CISCO)) { 4647 printf("%s: LCP keepalive timed out, going to restart the connection\n", 4648 ifp->if_xname); 4649 sp->pp_alivecnt = 0; 4650 4651 /* we are down, close all open protocols */ 4652 lcp.Close(sp); 4653 4654 /* And now prepare LCP to reestablish the link, if configured to do so. */ 4655 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 4656 4657 /* Close connection imediatly, completition of this 4658 * will summon the magic needed to reestablish it. */ 4659 sp->pp_tlf(sp); 4660 continue; 4661 } 4662 } 4663 if (sp->pp_alivecnt <= MAXALIVECNT) 4664 ++sp->pp_alivecnt; 4665 if (sp->pp_flags & PP_CISCO) 4666 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ, 4667 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 4668 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 4669 int32_t nmagic = htonl (sp->lcp.magic); 4670 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 4671 sppp_cp_send (sp, PPP_LCP, ECHO_REQ, 4672 sp->lcp.echoid, 4, &nmagic); 4673 } 4674 } 4675 splx(s); 4676 callout_reset(&keepalive_ch, hz * 10, sppp_keepalive, NULL); 4677 } 4678 4679 /* 4680 * Get both IP addresses. 4681 */ 4682 static void 4683 sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, u_int32_t *srcmask) 4684 { 4685 struct ifnet *ifp = &sp->pp_if; 4686 struct ifaddr *ifa; 4687 struct sockaddr_in *si, *sm; 4688 u_int32_t ssrc, ddst; 4689 4690 sm = NULL; 4691 ssrc = ddst = 0; 4692 /* 4693 * Pick the first AF_INET address from the list, 4694 * aliases don't make any sense on a p2p link anyway. 4695 */ 4696 si = 0; 4697 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 4698 if (ifa->ifa_addr->sa_family == AF_INET) { 4699 si = (struct sockaddr_in *)ifa->ifa_addr; 4700 sm = (struct sockaddr_in *)ifa->ifa_netmask; 4701 if (si) 4702 break; 4703 } 4704 } 4705 if (ifa) { 4706 if (si && si->sin_addr.s_addr) { 4707 ssrc = si->sin_addr.s_addr; 4708 if (srcmask) 4709 *srcmask = ntohl(sm->sin_addr.s_addr); 4710 } 4711 4712 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 4713 if (si && si->sin_addr.s_addr) 4714 ddst = si->sin_addr.s_addr; 4715 } 4716 4717 if (dst) *dst = ntohl(ddst); 4718 if (src) *src = ntohl(ssrc); 4719 } 4720 4721 /* 4722 * Set IP addresses. Must be called at splnet. 4723 * If an address is 0, leave it the way it is. 4724 */ 4725 static void 4726 sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr) 4727 { 4728 STDDCL; 4729 struct ifaddr *ifa; 4730 struct sockaddr_in *si; 4731 struct sockaddr_in *dest; 4732 4733 /* 4734 * Pick the first AF_INET address from the list, 4735 * aliases don't make any sense on a p2p link anyway. 4736 */ 4737 4738 si = 0; 4739 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4740 { 4741 if (ifa->ifa_addr->sa_family == AF_INET) 4742 { 4743 si = (struct sockaddr_in *)ifa->ifa_addr; 4744 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4745 if (si) 4746 break; 4747 } 4748 } 4749 4750 if (ifa && si) 4751 { 4752 int error; 4753 struct sockaddr_in new_sin = *si; 4754 struct sockaddr_in new_dst = *dest; 4755 4756 /* 4757 * Scrub old routes now instead of calling in_ifinit with 4758 * scrub=1, because we may change the dstaddr 4759 * before the call to in_ifinit. 4760 */ 4761 in_ifscrub(ifp, ifatoia(ifa)); 4762 4763 if (myaddr != 0) 4764 new_sin.sin_addr.s_addr = htonl(myaddr); 4765 if (hisaddr != 0) { 4766 new_dst.sin_addr.s_addr = htonl(hisaddr); 4767 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) { 4768 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 4769 *dest = new_dst; /* fix dstaddr in place */ 4770 } 4771 } 4772 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4773 if(debug && error) 4774 { 4775 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addrs: in_ifinit " 4776 " failed, error=%d\n", SPP_ARGS(ifp), error); 4777 } 4778 } 4779 } 4780 4781 /* 4782 * Clear IP addresses. Must be called at splnet. 4783 */ 4784 static void 4785 sppp_clear_ip_addrs(struct sppp *sp) 4786 { 4787 struct ifnet *ifp = &sp->pp_if; 4788 struct ifaddr *ifa; 4789 struct sockaddr_in *si; 4790 struct sockaddr_in *dest; 4791 4792 u_int32_t remote; 4793 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4794 remote = sp->ipcp.saved_hisaddr; 4795 else 4796 sppp_get_ip_addrs(sp, 0, &remote, 0); 4797 4798 /* 4799 * Pick the first AF_INET address from the list, 4800 * aliases don't make any sense on a p2p link anyway. 4801 */ 4802 4803 si = 0; 4804 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4805 { 4806 if (ifa->ifa_addr->sa_family == AF_INET) 4807 { 4808 si = (struct sockaddr_in *)ifa->ifa_addr; 4809 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4810 if (si) 4811 break; 4812 } 4813 } 4814 4815 if (ifa && si) 4816 { 4817 struct sockaddr_in new_sin = *si; 4818 4819 in_ifscrub(ifp, ifatoia(ifa)); 4820 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 4821 new_sin.sin_addr.s_addr = 0; 4822 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4823 /* replace peer addr in place */ 4824 dest->sin_addr.s_addr = sp->ipcp.saved_hisaddr; 4825 in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4826 } 4827 } 4828 4829 #ifdef INET6 4830 /* 4831 * Get both IPv6 addresses. 4832 */ 4833 static void 4834 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 4835 struct in6_addr *srcmask) 4836 { 4837 struct ifnet *ifp = &sp->pp_if; 4838 struct ifaddr *ifa; 4839 struct sockaddr_in6 *si, *sm; 4840 struct in6_addr ssrc, ddst; 4841 4842 sm = NULL; 4843 memset(&ssrc, 0, sizeof(ssrc)); 4844 memset(&ddst, 0, sizeof(ddst)); 4845 /* 4846 * Pick the first link-local AF_INET6 address from the list, 4847 * aliases don't make any sense on a p2p link anyway. 4848 */ 4849 si = 0; 4850 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4851 if (ifa->ifa_addr->sa_family == AF_INET6) { 4852 si = (struct sockaddr_in6 *)ifa->ifa_addr; 4853 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 4854 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 4855 break; 4856 } 4857 if (ifa) { 4858 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 4859 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc)); 4860 if (srcmask) { 4861 bcopy(&sm->sin6_addr, srcmask, 4862 sizeof(*srcmask)); 4863 } 4864 } 4865 4866 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 4867 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 4868 bcopy(&si->sin6_addr, &ddst, sizeof(ddst)); 4869 } 4870 4871 if (dst) 4872 bcopy(&ddst, dst, sizeof(*dst)); 4873 if (src) 4874 bcopy(&ssrc, src, sizeof(*src)); 4875 } 4876 4877 #ifdef IPV6CP_MYIFID_DYN 4878 /* 4879 * Generate random ifid. 4880 */ 4881 static void 4882 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 4883 { 4884 /* TBD */ 4885 } 4886 4887 /* 4888 * Set my IPv6 address. Must be called at splnet. 4889 */ 4890 static void 4891 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 4892 { 4893 STDDCL; 4894 struct ifaddr *ifa; 4895 struct sockaddr_in6 *sin6; 4896 4897 /* 4898 * Pick the first link-local AF_INET6 address from the list, 4899 * aliases don't make any sense on a p2p link anyway. 4900 */ 4901 4902 sin6 = NULL; 4903 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4904 { 4905 if (ifa->ifa_addr->sa_family == AF_INET6) 4906 { 4907 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 4908 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 4909 break; 4910 } 4911 } 4912 4913 if (ifa && sin6) 4914 { 4915 int error; 4916 struct sockaddr_in6 new_sin6 = *sin6; 4917 4918 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr)); 4919 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 4920 if (debug && error) 4921 { 4922 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit " 4923 " failed, error=%d\n", SPP_ARGS(ifp), error); 4924 } 4925 } 4926 } 4927 #endif 4928 4929 /* 4930 * Suggest a candidate address to be used by peer. 4931 */ 4932 static void 4933 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 4934 { 4935 struct in6_addr myaddr; 4936 struct timeval tv; 4937 4938 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4939 4940 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 4941 microtime(&tv); 4942 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 4943 myaddr.s6_addr[14] ^= 0xff; 4944 myaddr.s6_addr[15] ^= 0xff; 4945 } else { 4946 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 4947 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 4948 } 4949 if (suggest) 4950 bcopy(&myaddr, suggest, sizeof(myaddr)); 4951 } 4952 #endif /*INET6*/ 4953 4954 /* 4955 * Process ioctl requests specific to the PPP interface. 4956 * Permissions have already been checked. 4957 */ 4958 static int 4959 sppp_params(struct sppp *sp, int cmd, void *data) 4960 { 4961 switch (cmd) { 4962 case SPPPGETAUTHCFG: 4963 { 4964 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 4965 int error; 4966 size_t len; 4967 4968 cfg->myauthflags = sp->myauth.flags; 4969 cfg->hisauthflags = sp->hisauth.flags; 4970 strncpy(cfg->ifname, sp->pp_if.if_xname, IFNAMSIZ); 4971 cfg->hisauth = 0; 4972 if (sp->hisauth.proto) 4973 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4974 cfg->myauth = 0; 4975 if (sp->myauth.proto) 4976 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4977 if (cfg->myname_length == 0) { 4978 if (sp->myauth.name != NULL) 4979 cfg->myname_length = sp->myauth.name_len + 1; 4980 } else { 4981 if (sp->myauth.name == NULL) { 4982 cfg->myname_length = 0; 4983 } else { 4984 len = sp->myauth.name_len + 1; 4985 if (cfg->myname_length < len) 4986 return (ENAMETOOLONG); 4987 error = copyout(sp->myauth.name, cfg->myname, len); 4988 if (error) return error; 4989 } 4990 } 4991 if (cfg->hisname_length == 0) { 4992 if(sp->hisauth.name != NULL) 4993 cfg->hisname_length = sp->hisauth.name_len + 1; 4994 } else { 4995 if (sp->hisauth.name == NULL) { 4996 cfg->hisname_length = 0; 4997 } else { 4998 len = sp->hisauth.name_len + 1; 4999 if (cfg->hisname_length < len) 5000 return (ENAMETOOLONG); 5001 error = copyout(sp->hisauth.name, cfg->hisname, len); 5002 if (error) return error; 5003 } 5004 } 5005 } 5006 break; 5007 case SPPPSETAUTHCFG: 5008 { 5009 struct spppauthcfg *cfg = (struct spppauthcfg*)data; 5010 int error; 5011 5012 if (sp->myauth.name) { 5013 free(sp->myauth.name, M_DEVBUF); 5014 sp->myauth.name = NULL; 5015 } 5016 if (sp->myauth.secret) { 5017 free(sp->myauth.secret, M_DEVBUF); 5018 sp->myauth.secret = NULL; 5019 } 5020 if (sp->hisauth.name) { 5021 free(sp->hisauth.name, M_DEVBUF); 5022 sp->hisauth.name = NULL; 5023 } 5024 if (sp->hisauth.secret) { 5025 free(sp->hisauth.secret, M_DEVBUF); 5026 sp->hisauth.secret = NULL; 5027 } 5028 5029 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5030 if (cfg->hisname_length >= MCLBYTES) 5031 return (ENAMETOOLONG); 5032 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5033 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5034 if (error) { 5035 free(sp->hisauth.name, M_DEVBUF); 5036 sp->hisauth.name = NULL; 5037 return error; 5038 } 5039 sp->hisauth.name_len = cfg->hisname_length - 1; 5040 sp->hisauth.name[sp->hisauth.name_len] = 0; 5041 } 5042 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5043 if (cfg->hissecret_length >= MCLBYTES) 5044 return (ENAMETOOLONG); 5045 sp->hisauth.secret = malloc(cfg->hissecret_length, M_DEVBUF, M_WAITOK); 5046 error = copyin(cfg->hissecret, sp->hisauth.secret, cfg->hissecret_length); 5047 if (error) { 5048 free(sp->hisauth.secret, M_DEVBUF); 5049 sp->hisauth.secret = NULL; 5050 return error; 5051 } 5052 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5053 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5054 } 5055 if (cfg->myname != NULL && cfg->myname_length > 0) { 5056 if (cfg->myname_length >= MCLBYTES) 5057 return (ENAMETOOLONG); 5058 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5059 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5060 if (error) { 5061 free(sp->myauth.name, M_DEVBUF); 5062 sp->myauth.name = NULL; 5063 return error; 5064 } 5065 sp->myauth.name_len = cfg->myname_length - 1; 5066 sp->myauth.name[sp->myauth.name_len] = 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_len = cfg->mysecret_length - 1; 5079 sp->myauth.secret[sp->myauth.secret_len] = 0; 5080 } 5081 sp->myauth.flags = cfg->myauthflags; 5082 if (cfg->myauth) 5083 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5084 sp->hisauth.flags = cfg->hisauthflags; 5085 if (cfg->hisauth) 5086 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5087 sp->pp_auth_failures = 0; 5088 if (sp->hisauth.proto != 0) 5089 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 5090 else 5091 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 5092 } 5093 break; 5094 case SPPPGETLCPCFG: 5095 { 5096 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5097 lcp->lcp_timeout = sp->lcp.timeout; 5098 } 5099 break; 5100 case SPPPSETLCPCFG: 5101 { 5102 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5103 sp->lcp.timeout = lcp->lcp_timeout; 5104 } 5105 break; 5106 case SPPPGETSTATUS: 5107 { 5108 struct spppstatus *status = (struct spppstatus *)data; 5109 status->phase = sp->pp_phase; 5110 } 5111 break; 5112 case SPPPGETIDLETO: 5113 { 5114 struct spppidletimeout *to = (struct spppidletimeout *)data; 5115 to->idle_seconds = sp->pp_idle_timeout; 5116 } 5117 break; 5118 case SPPPSETIDLETO: 5119 { 5120 struct spppidletimeout *to = (struct spppidletimeout *)data; 5121 sp->pp_idle_timeout = to->idle_seconds; 5122 } 5123 break; 5124 case SPPPSETAUTHFAILURE: 5125 { 5126 struct spppauthfailuresettings *afsettings = (struct spppauthfailuresettings *)data; 5127 sp->pp_max_auth_fail = afsettings->max_failures; 5128 sp->pp_auth_failures = 0; 5129 } 5130 break; 5131 case SPPPGETAUTHFAILURES: 5132 { 5133 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5134 stats->auth_failures = sp->pp_auth_failures; 5135 stats->max_failures = sp->pp_max_auth_fail; 5136 } 5137 break; 5138 case SPPPSETDNSOPTS: 5139 { 5140 struct spppdnssettings *req = (struct spppdnssettings*)data; 5141 sp->query_dns = req->query_dns & 3; 5142 } 5143 break; 5144 case SPPPGETDNSOPTS: 5145 { 5146 struct spppdnssettings *req = (struct spppdnssettings*)data; 5147 req->query_dns = sp->query_dns; 5148 } 5149 break; 5150 case SPPPGETDNSADDRS: 5151 { 5152 struct spppdnsaddrs *addrs = (struct spppdnsaddrs*)data; 5153 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5154 } 5155 break; 5156 default: 5157 return (EINVAL); 5158 } 5159 5160 return (0); 5161 } 5162 5163 static void 5164 sppp_phase_network(struct sppp *sp) 5165 { 5166 STDDCL; 5167 int i; 5168 u_int32_t mask; 5169 5170 sp->pp_phase = SPPP_PHASE_NETWORK; 5171 5172 if(debug) 5173 { 5174 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 5175 sppp_phase_name(sp->pp_phase)); 5176 } 5177 5178 /* Notify NCPs now. */ 5179 for (i = 0; i < IDX_COUNT; i++) 5180 if ((cps[i])->flags & CP_NCP) 5181 (cps[i])->Open(sp); 5182 5183 /* Send Up events to all NCPs. */ 5184 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5185 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) 5186 (cps[i])->Up(sp); 5187 5188 /* if no NCP is starting, all this was in vain, close down */ 5189 sppp_lcp_check_and_close(sp); 5190 } 5191 5192 5193 static const char * 5194 sppp_cp_type_name(u_char type) 5195 { 5196 static char buf[12]; 5197 switch (type) { 5198 case CONF_REQ: return "conf-req"; 5199 case CONF_ACK: return "conf-ack"; 5200 case CONF_NAK: return "conf-nak"; 5201 case CONF_REJ: return "conf-rej"; 5202 case TERM_REQ: return "term-req"; 5203 case TERM_ACK: return "term-ack"; 5204 case CODE_REJ: return "code-rej"; 5205 case PROTO_REJ: return "proto-rej"; 5206 case ECHO_REQ: return "echo-req"; 5207 case ECHO_REPLY: return "echo-reply"; 5208 case DISC_REQ: return "discard-req"; 5209 } 5210 sprintf (buf, "0x%x", type); 5211 return buf; 5212 } 5213 5214 static const char * 5215 sppp_auth_type_name(u_short proto, u_char type) 5216 { 5217 static char buf[12]; 5218 switch (proto) { 5219 case PPP_CHAP: 5220 switch (type) { 5221 case CHAP_CHALLENGE: return "challenge"; 5222 case CHAP_RESPONSE: return "response"; 5223 case CHAP_SUCCESS: return "success"; 5224 case CHAP_FAILURE: return "failure"; 5225 } 5226 case PPP_PAP: 5227 switch (type) { 5228 case PAP_REQ: return "req"; 5229 case PAP_ACK: return "ack"; 5230 case PAP_NAK: return "nak"; 5231 } 5232 } 5233 sprintf (buf, "0x%x", type); 5234 return buf; 5235 } 5236 5237 static const char * 5238 sppp_lcp_opt_name(u_char opt) 5239 { 5240 static char buf[12]; 5241 switch (opt) { 5242 case LCP_OPT_MRU: return "mru"; 5243 case LCP_OPT_ASYNC_MAP: return "async-map"; 5244 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 5245 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 5246 case LCP_OPT_MAGIC: return "magic"; 5247 case LCP_OPT_PROTO_COMP: return "proto-comp"; 5248 case LCP_OPT_ADDR_COMP: return "addr-comp"; 5249 } 5250 sprintf (buf, "0x%x", opt); 5251 return buf; 5252 } 5253 5254 static const char * 5255 sppp_ipcp_opt_name(u_char opt) 5256 { 5257 static char buf[12]; 5258 switch (opt) { 5259 case IPCP_OPT_ADDRESSES: return "addresses"; 5260 case IPCP_OPT_COMPRESSION: return "compression"; 5261 case IPCP_OPT_ADDRESS: return "address"; 5262 } 5263 sprintf (buf, "0x%x", opt); 5264 return buf; 5265 } 5266 5267 #ifdef INET6 5268 static const char * 5269 sppp_ipv6cp_opt_name(u_char opt) 5270 { 5271 static char buf[12]; 5272 switch (opt) { 5273 case IPV6CP_OPT_IFID: return "ifid"; 5274 case IPV6CP_OPT_COMPRESSION: return "compression"; 5275 } 5276 sprintf (buf, "0x%x", opt); 5277 return buf; 5278 } 5279 #endif 5280 5281 static const char * 5282 sppp_state_name(int state) 5283 { 5284 switch (state) { 5285 case STATE_INITIAL: return "initial"; 5286 case STATE_STARTING: return "starting"; 5287 case STATE_CLOSED: return "closed"; 5288 case STATE_STOPPED: return "stopped"; 5289 case STATE_CLOSING: return "closing"; 5290 case STATE_STOPPING: return "stopping"; 5291 case STATE_REQ_SENT: return "req-sent"; 5292 case STATE_ACK_RCVD: return "ack-rcvd"; 5293 case STATE_ACK_SENT: return "ack-sent"; 5294 case STATE_OPENED: return "opened"; 5295 } 5296 return "illegal"; 5297 } 5298 5299 static const char * 5300 sppp_phase_name(int phase) 5301 { 5302 switch (phase) { 5303 case SPPP_PHASE_DEAD: return "dead"; 5304 case SPPP_PHASE_ESTABLISH: return "establish"; 5305 case SPPP_PHASE_TERMINATE: return "terminate"; 5306 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 5307 case SPPP_PHASE_NETWORK: return "network"; 5308 } 5309 return "illegal"; 5310 } 5311 5312 static const char * 5313 sppp_proto_name(u_short proto) 5314 { 5315 static char buf[12]; 5316 switch (proto) { 5317 case PPP_LCP: return "lcp"; 5318 case PPP_IPCP: return "ipcp"; 5319 case PPP_PAP: return "pap"; 5320 case PPP_CHAP: return "chap"; 5321 case PPP_IPV6CP: return "ipv6cp"; 5322 } 5323 sprintf(buf, "0x%x", (unsigned)proto); 5324 return buf; 5325 } 5326 5327 static void 5328 sppp_print_bytes(const u_char *p, u_short len) 5329 { 5330 addlog(" %02x", *p++); 5331 while (--len > 0) 5332 addlog("-%02x", *p++); 5333 } 5334 5335 static void 5336 sppp_print_string(const char *p, u_short len) 5337 { 5338 u_char c; 5339 5340 while (len-- > 0) { 5341 c = *p++; 5342 /* 5343 * Print only ASCII chars directly. RFC 1994 recommends 5344 * using only them, but we don't rely on it. */ 5345 if (c < ' ' || c > '~') 5346 addlog("\\x%x", c); 5347 else 5348 addlog("%c", c); 5349 } 5350 } 5351 5352 static const char * 5353 sppp_dotted_quad(u_int32_t addr) 5354 { 5355 static char s[16]; 5356 sprintf(s, "%d.%d.%d.%d", 5357 (int)((addr >> 24) & 0xff), 5358 (int)((addr >> 16) & 0xff), 5359 (int)((addr >> 8) & 0xff), 5360 (int)(addr & 0xff)); 5361 return s; 5362 } 5363 5364 /* a dummy, used to drop uninteresting events */ 5365 static void 5366 sppp_null(struct sppp *unused) 5367 { 5368 /* do just nothing */ 5369 } 5370 /* 5371 * This file is large. Tell emacs to highlight it nevertheless. 5372 * 5373 * Local Variables: 5374 * hilit-auto-highlight-maxout: 120000 5375 * End: 5376 */ 5377
Indexes created Fri Sep 26 08:10:20 GMT 2025