if_spppsubr.c revision 1.49
1 /* $NetBSD: if_spppsubr.c,v 1.49 2002/07/11 21:21:53 yamt 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 1.49 2002/07/11 21:21:53 yamt 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 = 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 = 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 = 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 IF_ENQUEUE(ifq, m); 892 } else 893 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, rv); 894 if (rv != 0) { 895 ++ifp->if_oerrors; 896 splx(s); 897 return (rv); 898 } 899 900 if (! (ifp->if_flags & IFF_OACTIVE)) 901 (*ifp->if_start) (ifp); 902 903 /* 904 * Count output packets and bytes. 905 * The packet length includes header + additional hardware framing 906 * according to RFC 1333. 907 */ 908 ifp->if_obytes += len + sp->pp_framebytes; 909 splx (s); 910 return (0); 911 } 912 913 void 914 sppp_attach(struct ifnet *ifp) 915 { 916 struct sppp *sp = (struct sppp*) ifp; 917 918 /* Initialize keepalive handler. */ 919 if (! spppq) { 920 callout_init(&keepalive_ch); 921 callout_reset(&keepalive_ch, hz * 10, sppp_keepalive, NULL); 922 } 923 924 /* Insert new entry into the keepalive list. */ 925 sp->pp_next = spppq; 926 spppq = sp; 927 928 sp->pp_if.if_type = IFT_PPP; 929 sp->pp_if.if_output = sppp_output; 930 sp->pp_fastq.ifq_maxlen = 32; 931 sp->pp_cpq.ifq_maxlen = 20; 932 sp->pp_loopcnt = 0; 933 sp->pp_alivecnt = 0; 934 sp->pp_last_activity = 0; 935 sp->pp_idle_timeout = 0; 936 memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq)); 937 memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq)); 938 sp->pp_auth_failures = 0; 939 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 940 sp->pp_phase = SPPP_PHASE_DEAD; 941 sp->pp_up = lcp.Up; 942 sp->pp_down = lcp.Down; 943 944 if_alloc_sadl(ifp); 945 946 memset(&sp->myauth, 0, sizeof sp->myauth); 947 memset(&sp->hisauth, 0, sizeof sp->hisauth); 948 sppp_lcp_init(sp); 949 sppp_ipcp_init(sp); 950 sppp_ipv6cp_init(sp); 951 sppp_pap_init(sp); 952 sppp_chap_init(sp); 953 } 954 955 void 956 sppp_detach(struct ifnet *ifp) 957 { 958 struct sppp **q, *p, *sp = (struct sppp*) ifp; 959 int i; 960 961 /* Remove the entry from the keepalive list. */ 962 for (q = &spppq; (p = *q); q = &p->pp_next) 963 if (p == sp) { 964 *q = p->pp_next; 965 break; 966 } 967 968 /* Stop keepalive handler. */ 969 if (! spppq) { 970 callout_stop(&keepalive_ch); 971 } 972 973 for (i = 0; i < IDX_COUNT; i++) { 974 callout_stop(&sp->ch[i]); 975 } 976 callout_stop(&sp->pap_my_to_ch); 977 978 /* free authentication info */ 979 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 980 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 981 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 982 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 983 984 if_free_sadl(ifp); 985 } 986 987 /* 988 * Flush the interface output queue. 989 */ 990 void 991 sppp_flush(struct ifnet *ifp) 992 { 993 struct sppp *sp = (struct sppp*) ifp; 994 995 IFQ_PURGE (&sp->pp_if.if_snd); 996 IF_PURGE (&sp->pp_fastq); 997 IF_PURGE (&sp->pp_cpq); 998 } 999 1000 /* 1001 * Check if the output queue is empty. 1002 */ 1003 int 1004 sppp_isempty(struct ifnet *ifp) 1005 { 1006 struct sppp *sp = (struct sppp*) ifp; 1007 int empty, s; 1008 1009 s = splnet(); 1010 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1011 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1012 splx(s); 1013 return (empty); 1014 } 1015 1016 /* 1017 * Get next packet to send. 1018 */ 1019 struct mbuf * 1020 sppp_dequeue(struct ifnet *ifp) 1021 { 1022 struct sppp *sp = (struct sppp*) ifp; 1023 struct mbuf *m; 1024 int s; 1025 1026 s = splnet(); 1027 /* 1028 * Process only the control protocol queue until we have at 1029 * least one NCP open. 1030 * 1031 * Do always serve all three queues in Cisco mode. 1032 */ 1033 IF_DEQUEUE(&sp->pp_cpq, m); 1034 if (m == NULL && 1035 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1036 IF_DEQUEUE(&sp->pp_fastq, m); 1037 if (m == NULL) 1038 IF_DEQUEUE (&sp->pp_if.if_snd, m); 1039 } 1040 splx(s); 1041 return m; 1042 } 1043 1044 /* 1045 * Pick the next packet, do not remove it from the queue. 1046 */ 1047 struct mbuf * 1048 sppp_pick(struct ifnet *ifp) 1049 { 1050 struct sppp *sp = (struct sppp*)ifp; 1051 struct mbuf *m; 1052 int s; 1053 1054 s= splnet (); 1055 1056 m = sp->pp_cpq.ifq_head; 1057 if (m == NULL && 1058 (sp->pp_phase == SPPP_PHASE_NETWORK || 1059 (sp->pp_flags & PP_CISCO) != 0)) 1060 if ((m = sp->pp_fastq.ifq_head) == NULL) 1061 m = sp->pp_if.if_snd.ifq_head; 1062 splx (s); 1063 return (m); 1064 } 1065 1066 /* 1067 * Process an ioctl request. Called on low priority level. 1068 */ 1069 int 1070 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1071 { 1072 struct ifreq *ifr = (struct ifreq*) data; 1073 struct sppp *sp = (struct sppp*) ifp; 1074 int s, error=0, going_up, going_down, newmode; 1075 1076 s = splnet(); 1077 switch (cmd) { 1078 case SIOCAIFADDR: 1079 case SIOCSIFDSTADDR: 1080 break; 1081 1082 case SIOCSIFADDR: 1083 if_up(ifp); 1084 /* fall through... */ 1085 1086 case SIOCSIFFLAGS: 1087 going_up = ifp->if_flags & IFF_UP && 1088 (ifp->if_flags & IFF_RUNNING) == 0; 1089 going_down = (ifp->if_flags & IFF_UP) == 0 && 1090 ifp->if_flags & IFF_RUNNING; 1091 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1092 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1093 /* sanity */ 1094 newmode = IFF_PASSIVE; 1095 ifp->if_flags &= ~IFF_AUTO; 1096 } 1097 1098 if (going_up || going_down) 1099 lcp.Close(sp); 1100 if (going_up && newmode == 0) { 1101 /* neither auto-dial nor passive */ 1102 ifp->if_flags |= IFF_RUNNING; 1103 if (!(sp->pp_flags & PP_CISCO)) 1104 lcp.Open(sp); 1105 } else if (going_down) { 1106 sppp_flush(ifp); 1107 ifp->if_flags &= ~IFF_RUNNING; 1108 } 1109 1110 break; 1111 1112 #ifdef SIOCSIFMTU 1113 #ifndef ifr_mtu 1114 #define ifr_mtu ifr_metric 1115 #endif 1116 case SIOCSIFMTU: 1117 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru) 1118 return (EINVAL); 1119 ifp->if_mtu = ifr->ifr_mtu; 1120 break; 1121 #endif 1122 #ifdef SLIOCSETMTU 1123 case SLIOCSETMTU: 1124 if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru) 1125 return (EINVAL); 1126 ifp->if_mtu = *(short*)data; 1127 break; 1128 #endif 1129 #ifdef SIOCGIFMTU 1130 case SIOCGIFMTU: 1131 ifr->ifr_mtu = ifp->if_mtu; 1132 break; 1133 #endif 1134 #ifdef SLIOCGETMTU 1135 case SLIOCGETMTU: 1136 *(short*)data = ifp->if_mtu; 1137 break; 1138 #endif 1139 case SIOCADDMULTI: 1140 case SIOCDELMULTI: 1141 break; 1142 1143 case SPPPSETAUTHCFG: 1144 case SPPPSETLCPCFG: 1145 case SPPPSETIDLETO: 1146 case SPPPSETAUTHFAILURE: 1147 case SPPPSETDNSOPTS: 1148 { 1149 struct proc *p = curproc; /* XXX */ 1150 1151 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1152 break; 1153 } 1154 /* FALLTHROUGH */ 1155 case SPPPGETAUTHCFG: 1156 case SPPPGETLCPCFG: 1157 case SPPPGETSTATUS: 1158 case SPPPGETIDLETO: 1159 case SPPPGETAUTHFAILURES: 1160 case SPPPGETDNSOPTS: 1161 case SPPPGETDNSADDRS: 1162 error = sppp_params(sp, cmd, data); 1163 break; 1164 1165 default: 1166 error = ENOTTY; 1167 } 1168 splx(s); 1169 return (error); 1170 } 1171 1172 1173 /* 1174 * Cisco framing implementation. 1175 */ 1176 1177 /* 1178 * Handle incoming Cisco keepalive protocol packets. 1179 */ 1180 static void 1181 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1182 { 1183 STDDCL; 1184 struct cisco_packet *h; 1185 u_int32_t me, mymask; 1186 1187 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1188 if (debug) 1189 log(LOG_DEBUG, 1190 SPP_FMT "cisco invalid packet length: %d bytes\n", 1191 SPP_ARGS(ifp), m->m_pkthdr.len); 1192 return; 1193 } 1194 h = mtod (m, struct cisco_packet*); 1195 if (debug) 1196 log(LOG_DEBUG, 1197 SPP_FMT "cisco input: %d bytes " 1198 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1199 SPP_ARGS(ifp), m->m_pkthdr.len, 1200 ntohl (h->type), h->par1, h->par2, (u_int)h->rel, 1201 (u_int)h->time0, (u_int)h->time1); 1202 switch (ntohl (h->type)) { 1203 default: 1204 if (debug) 1205 addlog(SPP_FMT "cisco unknown packet type: 0x%x\n", 1206 SPP_ARGS(ifp), ntohl (h->type)); 1207 break; 1208 case CISCO_ADDR_REPLY: 1209 /* Reply on address request, ignore */ 1210 break; 1211 case CISCO_KEEPALIVE_REQ: 1212 sp->pp_alivecnt = 0; 1213 sp->pp_rseq[IDX_LCP] = ntohl (h->par1); 1214 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1215 /* Local and remote sequence numbers are equal. 1216 * Probably, the line is in loopback mode. */ 1217 if (sp->pp_loopcnt >= MAXALIVECNT) { 1218 printf (SPP_FMT "loopback\n", 1219 SPP_ARGS(ifp)); 1220 sp->pp_loopcnt = 0; 1221 if (ifp->if_flags & IFF_UP) { 1222 if_down (ifp); 1223 IF_PURGE (&sp->pp_cpq); 1224 } 1225 } 1226 ++sp->pp_loopcnt; 1227 1228 /* Generate new local sequence number */ 1229 sp->pp_seq[IDX_LCP] = random(); 1230 break; 1231 } 1232 sp->pp_loopcnt = 0; 1233 if (! (ifp->if_flags & IFF_UP) && 1234 (ifp->if_flags & IFF_RUNNING)) { 1235 if_up(ifp); 1236 } 1237 break; 1238 case CISCO_ADDR_REQ: 1239 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1240 if (me != 0L) 1241 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1242 break; 1243 } 1244 } 1245 1246 /* 1247 * Send Cisco keepalive packet. 1248 */ 1249 static void 1250 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1251 { 1252 STDDCL; 1253 struct ppp_header *h; 1254 struct cisco_packet *ch; 1255 struct mbuf *m; 1256 u_int32_t t = (time.tv_sec - boottime.tv_sec) * 1000; 1257 1258 MGETHDR (m, M_DONTWAIT, MT_DATA); 1259 if (! m) 1260 return; 1261 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1262 m->m_pkthdr.rcvif = 0; 1263 1264 h = mtod (m, struct ppp_header*); 1265 h->address = CISCO_MULTICAST; 1266 h->control = 0; 1267 h->protocol = htons (CISCO_KEEPALIVE); 1268 1269 ch = (struct cisco_packet*) (h + 1); 1270 ch->type = htonl (type); 1271 ch->par1 = htonl (par1); 1272 ch->par2 = htonl (par2); 1273 ch->rel = -1; 1274 1275 ch->time0 = htons ((u_short) (t >> 16)); 1276 ch->time1 = htons ((u_short) t); 1277 1278 if (debug) 1279 log(LOG_DEBUG, 1280 SPP_FMT "cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1281 SPP_ARGS(ifp), ntohl (ch->type), ch->par1, 1282 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1283 (u_int)ch->time1); 1284 1285 if (IF_QFULL (&sp->pp_cpq)) { 1286 IF_DROP (&sp->pp_fastq); 1287 IF_DROP (&ifp->if_snd); 1288 m_freem (m); 1289 } else 1290 IF_ENQUEUE (&sp->pp_cpq, m); 1291 if (! (ifp->if_flags & IFF_OACTIVE)) 1292 (*ifp->if_start) (ifp); 1293 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1294 } 1295 1296 /* 1297 * PPP protocol implementation. 1298 */ 1299 1300 /* 1301 * Send PPP control protocol packet. 1302 */ 1303 static void 1304 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1305 u_char ident, u_short len, void *data) 1306 { 1307 STDDCL; 1308 struct lcp_header *lh; 1309 struct mbuf *m; 1310 size_t pkthdrlen; 1311 1312 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1313 1314 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1315 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1316 MGETHDR (m, M_DONTWAIT, MT_DATA); 1317 if (! m) 1318 return; 1319 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1320 m->m_pkthdr.rcvif = 0; 1321 1322 if (sp->pp_flags & PP_NOFRAMING) { 1323 *mtod(m, u_int16_t*) = htons(proto); 1324 lh = (struct lcp_header*)(mtod(m, u_int8_t*) + 2); 1325 } else { 1326 struct ppp_header *h; 1327 h = mtod (m, struct ppp_header*); 1328 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1329 h->control = PPP_UI; /* Unnumbered Info */ 1330 h->protocol = htons (proto); /* Link Control Protocol */ 1331 lh = (struct lcp_header*) (h + 1); 1332 } 1333 lh->type = type; 1334 lh->ident = ident; 1335 lh->len = htons (LCP_HEADER_LEN + len); 1336 if (len) 1337 bcopy (data, lh+1, len); 1338 1339 if (debug) { 1340 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 1341 SPP_ARGS(ifp), 1342 sppp_proto_name(proto), 1343 sppp_cp_type_name (lh->type), lh->ident, 1344 ntohs (lh->len)); 1345 if (len) 1346 sppp_print_bytes ((u_char*) (lh+1), len); 1347 addlog(">\n"); 1348 } 1349 if (IF_QFULL (&sp->pp_cpq)) { 1350 IF_DROP (&sp->pp_fastq); 1351 IF_DROP (&ifp->if_snd); 1352 m_freem (m); 1353 ++ifp->if_oerrors; 1354 } else 1355 IF_ENQUEUE (&sp->pp_cpq, m); 1356 if (! (ifp->if_flags & IFF_OACTIVE)) 1357 (*ifp->if_start) (ifp); 1358 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1359 } 1360 1361 /* 1362 * Handle incoming PPP control protocol packets. 1363 */ 1364 static void 1365 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1366 { 1367 STDDCL; 1368 struct lcp_header *h; 1369 int len = m->m_pkthdr.len; 1370 int rv; 1371 u_char *p; 1372 u_int32_t u32; 1373 1374 if (len < 4) { 1375 if (debug) 1376 log(LOG_DEBUG, 1377 SPP_FMT "%s invalid packet length: %d bytes\n", 1378 SPP_ARGS(ifp), cp->name, len); 1379 return; 1380 } 1381 h = mtod (m, struct lcp_header*); 1382 if (debug) { 1383 log(LOG_DEBUG, 1384 SPP_FMT "%s input(%s): <%s id=0x%x len=%d", 1385 SPP_ARGS(ifp), cp->name, 1386 sppp_state_name(sp->state[cp->protoidx]), 1387 sppp_cp_type_name (h->type), h->ident, ntohs (h->len)); 1388 if (len > 4) 1389 sppp_print_bytes ((u_char*) (h+1), len-4); 1390 addlog(">\n"); 1391 } 1392 if (len > ntohs (h->len)) 1393 len = ntohs (h->len); 1394 p = (u_char *)(h + 1); 1395 switch (h->type) { 1396 case CONF_REQ: 1397 if (len < 4) { 1398 if (debug) 1399 addlog(SPP_FMT "%s invalid conf-req length %d\n", 1400 SPP_ARGS(ifp), cp->name, 1401 len); 1402 ++ifp->if_ierrors; 1403 break; 1404 } 1405 /* handle states where RCR doesn't get a SCA/SCN */ 1406 switch (sp->state[cp->protoidx]) { 1407 case STATE_CLOSING: 1408 case STATE_STOPPING: 1409 return; 1410 case STATE_CLOSED: 1411 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1412 0, 0); 1413 return; 1414 } 1415 rv = (cp->RCR)(sp, h, len); 1416 switch (sp->state[cp->protoidx]) { 1417 case STATE_OPENED: 1418 (cp->tld)(sp); 1419 (cp->scr)(sp); 1420 /* fall through... */ 1421 case STATE_ACK_SENT: 1422 case STATE_REQ_SENT: 1423 sppp_cp_change_state(cp, sp, rv? 1424 STATE_ACK_SENT: STATE_REQ_SENT); 1425 break; 1426 case STATE_STOPPED: 1427 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1428 (cp->scr)(sp); 1429 sppp_cp_change_state(cp, sp, rv? 1430 STATE_ACK_SENT: STATE_REQ_SENT); 1431 break; 1432 case STATE_ACK_RCVD: 1433 if (rv) { 1434 sppp_cp_change_state(cp, sp, STATE_OPENED); 1435 if (debug) 1436 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1437 SPP_ARGS(ifp), 1438 cp->name); 1439 (cp->tlu)(sp); 1440 } else 1441 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1442 break; 1443 default: 1444 printf(SPP_FMT "%s illegal %s in state %s\n", 1445 SPP_ARGS(ifp), cp->name, 1446 sppp_cp_type_name(h->type), 1447 sppp_state_name(sp->state[cp->protoidx])); 1448 ++ifp->if_ierrors; 1449 } 1450 break; 1451 case CONF_ACK: 1452 if (h->ident != sp->confid[cp->protoidx]) { 1453 if (debug) 1454 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1455 SPP_ARGS(ifp), cp->name, 1456 h->ident, sp->confid[cp->protoidx]); 1457 ++ifp->if_ierrors; 1458 break; 1459 } 1460 switch (sp->state[cp->protoidx]) { 1461 case STATE_CLOSED: 1462 case STATE_STOPPED: 1463 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1464 break; 1465 case STATE_CLOSING: 1466 case STATE_STOPPING: 1467 break; 1468 case STATE_REQ_SENT: 1469 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1470 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1471 break; 1472 case STATE_OPENED: 1473 (cp->tld)(sp); 1474 /* fall through */ 1475 case STATE_ACK_RCVD: 1476 (cp->scr)(sp); 1477 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1478 break; 1479 case STATE_ACK_SENT: 1480 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1481 sppp_cp_change_state(cp, sp, STATE_OPENED); 1482 if (debug) 1483 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1484 SPP_ARGS(ifp), cp->name); 1485 (cp->tlu)(sp); 1486 break; 1487 default: 1488 printf(SPP_FMT "%s illegal %s in state %s\n", 1489 SPP_ARGS(ifp), cp->name, 1490 sppp_cp_type_name(h->type), 1491 sppp_state_name(sp->state[cp->protoidx])); 1492 ++ifp->if_ierrors; 1493 } 1494 break; 1495 case CONF_NAK: 1496 case CONF_REJ: 1497 if (h->ident != sp->confid[cp->protoidx]) { 1498 if (debug) 1499 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1500 SPP_ARGS(ifp), cp->name, 1501 h->ident, sp->confid[cp->protoidx]); 1502 ++ifp->if_ierrors; 1503 break; 1504 } 1505 if (h->type == CONF_NAK) 1506 (cp->RCN_nak)(sp, h, len); 1507 else /* CONF_REJ */ 1508 (cp->RCN_rej)(sp, h, len); 1509 1510 switch (sp->state[cp->protoidx]) { 1511 case STATE_CLOSED: 1512 case STATE_STOPPED: 1513 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1514 break; 1515 case STATE_REQ_SENT: 1516 case STATE_ACK_SENT: 1517 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1518 (cp->scr)(sp); 1519 break; 1520 case STATE_OPENED: 1521 (cp->tld)(sp); 1522 /* fall through */ 1523 case STATE_ACK_RCVD: 1524 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1525 (cp->scr)(sp); 1526 break; 1527 case STATE_CLOSING: 1528 case STATE_STOPPING: 1529 break; 1530 default: 1531 printf(SPP_FMT "%s illegal %s in state %s\n", 1532 SPP_ARGS(ifp), cp->name, 1533 sppp_cp_type_name(h->type), 1534 sppp_state_name(sp->state[cp->protoidx])); 1535 ++ifp->if_ierrors; 1536 } 1537 break; 1538 1539 case TERM_REQ: 1540 switch (sp->state[cp->protoidx]) { 1541 case STATE_ACK_RCVD: 1542 case STATE_ACK_SENT: 1543 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1544 /* fall through */ 1545 case STATE_CLOSED: 1546 case STATE_STOPPED: 1547 case STATE_CLOSING: 1548 case STATE_STOPPING: 1549 case STATE_REQ_SENT: 1550 sta: 1551 /* Send Terminate-Ack packet. */ 1552 if (debug) 1553 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n", 1554 SPP_ARGS(ifp), cp->name); 1555 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1556 break; 1557 case STATE_OPENED: 1558 (cp->tld)(sp); 1559 sp->rst_counter[cp->protoidx] = 0; 1560 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1561 goto sta; 1562 break; 1563 default: 1564 printf(SPP_FMT "%s illegal %s in state %s\n", 1565 SPP_ARGS(ifp), cp->name, 1566 sppp_cp_type_name(h->type), 1567 sppp_state_name(sp->state[cp->protoidx])); 1568 ++ifp->if_ierrors; 1569 } 1570 break; 1571 case TERM_ACK: 1572 switch (sp->state[cp->protoidx]) { 1573 case STATE_CLOSED: 1574 case STATE_STOPPED: 1575 case STATE_REQ_SENT: 1576 case STATE_ACK_SENT: 1577 break; 1578 case STATE_CLOSING: 1579 (cp->tlf)(sp); 1580 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1581 sppp_lcp_check_and_close(sp); 1582 break; 1583 case STATE_STOPPING: 1584 (cp->tlf)(sp); 1585 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1586 sppp_lcp_check_and_close(sp); 1587 break; 1588 case STATE_ACK_RCVD: 1589 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1590 break; 1591 case STATE_OPENED: 1592 (cp->tld)(sp); 1593 (cp->scr)(sp); 1594 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1595 break; 1596 default: 1597 printf(SPP_FMT "%s illegal %s in state %s\n", 1598 SPP_ARGS(ifp), cp->name, 1599 sppp_cp_type_name(h->type), 1600 sppp_state_name(sp->state[cp->protoidx])); 1601 ++ifp->if_ierrors; 1602 } 1603 break; 1604 case CODE_REJ: 1605 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1606 log(LOG_INFO, 1607 SPP_FMT "%s: ignoring RXJ (%s) for code ?, " 1608 "danger will robinson\n", 1609 SPP_ARGS(ifp), cp->name, 1610 sppp_cp_type_name(h->type)); 1611 switch (sp->state[cp->protoidx]) { 1612 case STATE_CLOSED: 1613 case STATE_STOPPED: 1614 case STATE_REQ_SENT: 1615 case STATE_ACK_SENT: 1616 case STATE_CLOSING: 1617 case STATE_STOPPING: 1618 case STATE_OPENED: 1619 break; 1620 case STATE_ACK_RCVD: 1621 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1622 break; 1623 default: 1624 printf(SPP_FMT "%s illegal %s in state %s\n", 1625 SPP_ARGS(ifp), cp->name, 1626 sppp_cp_type_name(h->type), 1627 sppp_state_name(sp->state[cp->protoidx])); 1628 ++ifp->if_ierrors; 1629 } 1630 break; 1631 case PROTO_REJ: 1632 { 1633 int catastrophic; 1634 const struct cp *upper; 1635 int i; 1636 u_int16_t proto; 1637 1638 catastrophic = 0; 1639 upper = NULL; 1640 proto = p[0] << 8 | p[1]; 1641 for (i = 0; i < IDX_COUNT; i++) { 1642 if (cps[i]->proto == proto) { 1643 upper = cps[i]; 1644 break; 1645 } 1646 } 1647 if (upper == NULL) 1648 catastrophic++; 1649 1650 if (debug) 1651 log(LOG_INFO, 1652 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1653 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+', 1654 sppp_cp_type_name(h->type), proto, 1655 upper ? upper->name : "unknown", 1656 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1657 1658 /* 1659 * if we got RXJ+ against conf-req, the peer does not implement 1660 * this particular protocol type. terminate the protocol. 1661 */ 1662 if (upper && !catastrophic) { 1663 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1664 upper->Close(sp); 1665 break; 1666 } 1667 } 1668 1669 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1670 switch (sp->state[cp->protoidx]) { 1671 case STATE_CLOSED: 1672 case STATE_STOPPED: 1673 case STATE_REQ_SENT: 1674 case STATE_ACK_SENT: 1675 case STATE_CLOSING: 1676 case STATE_STOPPING: 1677 case STATE_OPENED: 1678 break; 1679 case STATE_ACK_RCVD: 1680 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1681 break; 1682 default: 1683 printf(SPP_FMT "%s illegal %s in state %s\n", 1684 SPP_ARGS(ifp), cp->name, 1685 sppp_cp_type_name(h->type), 1686 sppp_state_name(sp->state[cp->protoidx])); 1687 ++ifp->if_ierrors; 1688 } 1689 break; 1690 } 1691 case DISC_REQ: 1692 if (cp->proto != PPP_LCP) 1693 goto illegal; 1694 /* Discard the packet. */ 1695 break; 1696 case ECHO_REQ: 1697 if (cp->proto != PPP_LCP) 1698 goto illegal; 1699 if (sp->state[cp->protoidx] != STATE_OPENED) { 1700 if (debug) 1701 addlog(SPP_FMT "lcp echo req but lcp closed\n", 1702 SPP_ARGS(ifp)); 1703 ++ifp->if_ierrors; 1704 break; 1705 } 1706 if (len < 8) { 1707 if (debug) 1708 addlog(SPP_FMT "invalid lcp echo request " 1709 "packet length: %d bytes\n", 1710 SPP_ARGS(ifp), len); 1711 break; 1712 } 1713 memcpy(&u32, h + 1, sizeof u32); 1714 if (ntohl(u32) == sp->lcp.magic) { 1715 /* Line loopback mode detected. */ 1716 printf(SPP_FMT "loopback\n", SPP_ARGS(ifp)); 1717 if_down (ifp); 1718 IF_PURGE (&sp->pp_cpq); 1719 1720 /* Shut down the PPP link. */ 1721 /* XXX */ 1722 lcp.Down(sp); 1723 lcp.Up(sp); 1724 break; 1725 } 1726 u32 = htonl(sp->lcp.magic); 1727 memcpy(h + 1, &u32, sizeof u32); 1728 if (debug) 1729 addlog(SPP_FMT "got lcp echo req, sending echo rep\n", 1730 SPP_ARGS(ifp)); 1731 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1); 1732 break; 1733 case ECHO_REPLY: 1734 if (cp->proto != PPP_LCP) 1735 goto illegal; 1736 if (h->ident != sp->lcp.echoid) { 1737 ++ifp->if_ierrors; 1738 break; 1739 } 1740 if (len < 8) { 1741 if (debug) 1742 addlog(SPP_FMT "lcp invalid echo reply " 1743 "packet length: %d bytes\n", 1744 SPP_ARGS(ifp), len); 1745 break; 1746 } 1747 if (debug) 1748 addlog(SPP_FMT "lcp got echo rep\n", 1749 SPP_ARGS(ifp)); 1750 memcpy(&u32, h + 1, sizeof u32); 1751 if (ntohl(u32) != sp->lcp.magic) 1752 sp->pp_alivecnt = 0; 1753 break; 1754 default: 1755 /* Unknown packet type -- send Code-Reject packet. */ 1756 illegal: 1757 if (debug) 1758 addlog(SPP_FMT "%s send code-rej for 0x%x\n", 1759 SPP_ARGS(ifp), cp->name, h->type); 1760 sppp_cp_send(sp, cp->proto, CODE_REJ, 1761 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1762 ++ifp->if_ierrors; 1763 } 1764 } 1765 1766 1767 /* 1768 * The generic part of all Up/Down/Open/Close/TO event handlers. 1769 * Basically, the state transition handling in the automaton. 1770 */ 1771 static void 1772 sppp_up_event(const struct cp *cp, struct sppp *sp) 1773 { 1774 STDDCL; 1775 1776 if (debug) 1777 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n", 1778 SPP_ARGS(ifp), cp->name, 1779 sppp_state_name(sp->state[cp->protoidx])); 1780 1781 switch (sp->state[cp->protoidx]) { 1782 case STATE_INITIAL: 1783 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1784 break; 1785 case STATE_STARTING: 1786 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1787 (cp->scr)(sp); 1788 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1789 break; 1790 default: 1791 printf(SPP_FMT "%s illegal up in state %s\n", 1792 SPP_ARGS(ifp), cp->name, 1793 sppp_state_name(sp->state[cp->protoidx])); 1794 } 1795 } 1796 1797 static void 1798 sppp_down_event(const struct cp *cp, struct sppp *sp) 1799 { 1800 STDDCL; 1801 1802 if (debug) 1803 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n", 1804 SPP_ARGS(ifp), cp->name, 1805 sppp_state_name(sp->state[cp->protoidx])); 1806 1807 switch (sp->state[cp->protoidx]) { 1808 case STATE_CLOSED: 1809 case STATE_CLOSING: 1810 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1811 break; 1812 case STATE_STOPPED: 1813 (cp->tls)(sp); 1814 /* fall through */ 1815 case STATE_STOPPING: 1816 case STATE_REQ_SENT: 1817 case STATE_ACK_RCVD: 1818 case STATE_ACK_SENT: 1819 sppp_cp_change_state(cp, sp, STATE_STARTING); 1820 break; 1821 case STATE_OPENED: 1822 (cp->tld)(sp); 1823 sppp_cp_change_state(cp, sp, STATE_STARTING); 1824 break; 1825 default: 1826 printf(SPP_FMT "%s illegal down in state %s\n", 1827 SPP_ARGS(ifp), cp->name, 1828 sppp_state_name(sp->state[cp->protoidx])); 1829 } 1830 } 1831 1832 1833 static void 1834 sppp_open_event(const struct cp *cp, struct sppp *sp) 1835 { 1836 STDDCL; 1837 1838 if (debug) 1839 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n", 1840 SPP_ARGS(ifp), cp->name, 1841 sppp_state_name(sp->state[cp->protoidx])); 1842 1843 switch (sp->state[cp->protoidx]) { 1844 case STATE_INITIAL: 1845 (cp->tls)(sp); 1846 sppp_cp_change_state(cp, sp, STATE_STARTING); 1847 break; 1848 case STATE_STARTING: 1849 break; 1850 case STATE_CLOSED: 1851 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1852 (cp->scr)(sp); 1853 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1854 break; 1855 case STATE_STOPPED: 1856 case STATE_STOPPING: 1857 case STATE_REQ_SENT: 1858 case STATE_ACK_RCVD: 1859 case STATE_ACK_SENT: 1860 case STATE_OPENED: 1861 break; 1862 case STATE_CLOSING: 1863 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1864 break; 1865 } 1866 } 1867 1868 1869 static void 1870 sppp_close_event(const struct cp *cp, struct sppp *sp) 1871 { 1872 STDDCL; 1873 1874 if (debug) 1875 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n", 1876 SPP_ARGS(ifp), cp->name, 1877 sppp_state_name(sp->state[cp->protoidx])); 1878 1879 switch (sp->state[cp->protoidx]) { 1880 case STATE_INITIAL: 1881 case STATE_CLOSED: 1882 case STATE_CLOSING: 1883 break; 1884 case STATE_STARTING: 1885 (cp->tlf)(sp); 1886 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1887 break; 1888 case STATE_STOPPED: 1889 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1890 break; 1891 case STATE_STOPPING: 1892 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1893 break; 1894 case STATE_OPENED: 1895 (cp->tld)(sp); 1896 /* fall through */ 1897 case STATE_REQ_SENT: 1898 case STATE_ACK_RCVD: 1899 case STATE_ACK_SENT: 1900 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 1901 sppp_cp_send(sp, cp->proto, TERM_REQ, 1902 ++sp->pp_seq[cp->protoidx], 0, 0); 1903 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1904 break; 1905 } 1906 } 1907 1908 static void 1909 sppp_to_event(const struct cp *cp, struct sppp *sp) 1910 { 1911 STDDCL; 1912 int s; 1913 1914 s = splnet(); 1915 if (debug) 1916 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n", 1917 SPP_ARGS(ifp), cp->name, 1918 sppp_state_name(sp->state[cp->protoidx]), 1919 sp->rst_counter[cp->protoidx]); 1920 1921 if (--sp->rst_counter[cp->protoidx] < 0) 1922 /* TO- event */ 1923 switch (sp->state[cp->protoidx]) { 1924 case STATE_CLOSING: 1925 (cp->tlf)(sp); 1926 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1927 sppp_lcp_check_and_close(sp); 1928 break; 1929 case STATE_STOPPING: 1930 (cp->tlf)(sp); 1931 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1932 sppp_lcp_check_and_close(sp); 1933 break; 1934 case STATE_REQ_SENT: 1935 case STATE_ACK_RCVD: 1936 case STATE_ACK_SENT: 1937 (cp->tlf)(sp); 1938 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1939 sppp_lcp_check_and_close(sp); 1940 break; 1941 } 1942 else 1943 /* TO+ event */ 1944 switch (sp->state[cp->protoidx]) { 1945 case STATE_CLOSING: 1946 case STATE_STOPPING: 1947 sppp_cp_send(sp, cp->proto, TERM_REQ, 1948 ++sp->pp_seq[cp->protoidx], 0, 0); 1949 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1950 cp->TO, sp); 1951 break; 1952 case STATE_REQ_SENT: 1953 case STATE_ACK_RCVD: 1954 (cp->scr)(sp); 1955 /* sppp_cp_change_state() will restart the timer */ 1956 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1957 break; 1958 case STATE_ACK_SENT: 1959 (cp->scr)(sp); 1960 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1961 cp->TO, sp); 1962 break; 1963 } 1964 1965 splx(s); 1966 } 1967 1968 /* 1969 * Change the state of a control protocol in the state automaton. 1970 * Takes care of starting/stopping the restart timer. 1971 */ 1972 void 1973 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 1974 { 1975 sp->state[cp->protoidx] = newstate; 1976 callout_stop(&sp->ch[cp->protoidx]); 1977 switch (newstate) { 1978 case STATE_INITIAL: 1979 case STATE_STARTING: 1980 case STATE_CLOSED: 1981 case STATE_STOPPED: 1982 case STATE_OPENED: 1983 break; 1984 case STATE_CLOSING: 1985 case STATE_STOPPING: 1986 case STATE_REQ_SENT: 1987 case STATE_ACK_RCVD: 1988 case STATE_ACK_SENT: 1989 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1990 cp->TO, sp); 1991 break; 1992 } 1993 } 1994 1995 /* 1996 *--------------------------------------------------------------------------* 1997 * * 1998 * The LCP implementation. * 1999 * * 2000 *--------------------------------------------------------------------------* 2001 */ 2002 static void 2003 sppp_lcp_init(struct sppp *sp) 2004 { 2005 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 2006 sp->lcp.magic = 0; 2007 sp->state[IDX_LCP] = STATE_INITIAL; 2008 sp->fail_counter[IDX_LCP] = 0; 2009 sp->pp_seq[IDX_LCP] = 0; 2010 sp->pp_rseq[IDX_LCP] = 0; 2011 sp->lcp.protos = 0; 2012 sp->lcp.mru = sp->lcp.their_mru = PP_MTU; 2013 2014 /* 2015 * Initialize counters and timeout values. Note that we don't 2016 * use the 3 seconds suggested in RFC 1661 since we are likely 2017 * running on a fast link. XXX We should probably implement 2018 * the exponential backoff option. Note that these values are 2019 * relevant for all control protocols, not just LCP only. 2020 */ 2021 sp->lcp.timeout = 1 * hz; 2022 sp->lcp.max_terminate = 2; 2023 sp->lcp.max_configure = 10; 2024 sp->lcp.max_failure = 10; 2025 callout_init(&sp->ch[IDX_LCP]); 2026 } 2027 2028 static void 2029 sppp_lcp_up(struct sppp *sp) 2030 { 2031 STDDCL; 2032 2033 /* Initialize activity timestamp: opening a connection is an activity */ 2034 sp->pp_last_activity = time.tv_sec; 2035 2036 /* 2037 * If this interface is passive or dial-on-demand, and we are 2038 * still in Initial state, it means we've got an incoming 2039 * call. Activate the interface. 2040 */ 2041 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2042 if (debug) 2043 log(LOG_DEBUG, 2044 SPP_FMT "Up event", SPP_ARGS(ifp)); 2045 ifp->if_flags |= IFF_RUNNING; 2046 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2047 if (debug) 2048 addlog("(incoming call)\n"); 2049 sp->pp_flags |= PP_CALLIN; 2050 lcp.Open(sp); 2051 } else if (debug) 2052 addlog("\n"); 2053 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && 2054 (sp->state[IDX_LCP] == STATE_INITIAL)) { 2055 ifp->if_flags |= IFF_RUNNING; 2056 lcp.Open(sp); 2057 } 2058 2059 sppp_up_event(&lcp, sp); 2060 } 2061 2062 static void 2063 sppp_lcp_down(struct sppp *sp) 2064 { 2065 STDDCL; 2066 2067 sppp_down_event(&lcp, sp); 2068 2069 /* 2070 * If this is neither a dial-on-demand nor a passive 2071 * interface, simulate an ``ifconfig down'' action, so the 2072 * administrator can force a redial by another ``ifconfig 2073 * up''. XXX For leased line operation, should we immediately 2074 * try to reopen the connection here? 2075 */ 2076 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2077 if (debug) 2078 log(LOG_INFO, 2079 SPP_FMT "Down event (carrier loss), taking interface down.\n", 2080 SPP_ARGS(ifp)); 2081 if_down(ifp); 2082 } else { 2083 if (debug) 2084 log(LOG_DEBUG, 2085 SPP_FMT "Down event (carrier loss)\n", 2086 SPP_ARGS(ifp)); 2087 } 2088 sp->pp_flags &= ~PP_CALLIN; 2089 if (sp->state[IDX_LCP] != STATE_INITIAL) 2090 lcp.Close(sp); 2091 ifp->if_flags &= ~IFF_RUNNING; 2092 } 2093 2094 static void 2095 sppp_lcp_open(struct sppp *sp) 2096 { 2097 /* 2098 * If we are authenticator, negotiate LCP_AUTH 2099 */ 2100 if (sp->hisauth.proto != 0) 2101 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2102 else 2103 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2104 sp->pp_flags &= ~PP_NEEDAUTH; 2105 sppp_open_event(&lcp, sp); 2106 } 2107 2108 static void 2109 sppp_lcp_close(struct sppp *sp) 2110 { 2111 sppp_close_event(&lcp, sp); 2112 } 2113 2114 static void 2115 sppp_lcp_TO(void *cookie) 2116 { 2117 sppp_to_event(&lcp, (struct sppp *)cookie); 2118 } 2119 2120 /* 2121 * Analyze a configure request. Return true if it was agreeable, and 2122 * caused action sca, false if it has been rejected or nak'ed, and 2123 * caused action scn. (The return value is used to make the state 2124 * transition decision in the state automaton.) 2125 */ 2126 static int 2127 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2128 { 2129 STDDCL; 2130 u_char *buf, *r, *p; 2131 int origlen, rlen; 2132 u_int32_t nmagic; 2133 u_short authproto; 2134 2135 len -= 4; 2136 origlen = len; 2137 buf = r = malloc (len, M_TEMP, M_NOWAIT); 2138 if (! buf) 2139 return (0); 2140 2141 if (debug) 2142 log(LOG_DEBUG, SPP_FMT "lcp parse opts:", 2143 SPP_ARGS(ifp)); 2144 2145 /* pass 1: check for things that need to be rejected */ 2146 p = (void*) (h+1); 2147 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2148 if (debug) 2149 addlog(" %s", sppp_lcp_opt_name(*p)); 2150 switch (*p) { 2151 case LCP_OPT_MAGIC: 2152 /* Magic number. */ 2153 /* fall through, both are same length */ 2154 case LCP_OPT_ASYNC_MAP: 2155 /* Async control character map. */ 2156 if (len >= 6 || p[1] == 6) 2157 continue; 2158 if (debug) 2159 addlog(" [invalid]"); 2160 break; 2161 case LCP_OPT_MRU: 2162 /* Maximum receive unit. */ 2163 if (len >= 4 && p[1] == 4) 2164 continue; 2165 if (debug) 2166 addlog(" [invalid]"); 2167 break; 2168 case LCP_OPT_AUTH_PROTO: 2169 if (len < 4) { 2170 if (debug) 2171 addlog(" [invalid]"); 2172 break; 2173 } 2174 authproto = (p[2] << 8) + p[3]; 2175 if (authproto == PPP_CHAP && p[1] != 5) { 2176 if (debug) 2177 addlog(" [invalid chap len]"); 2178 break; 2179 } 2180 if (sp->myauth.proto == 0) { 2181 /* we are not configured to do auth */ 2182 if (debug) 2183 addlog(" [not configured]"); 2184 break; 2185 } 2186 /* 2187 * Remote want us to authenticate, remember this, 2188 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2189 * up. 2190 */ 2191 sp->pp_flags |= PP_NEEDAUTH; 2192 continue; 2193 default: 2194 /* Others not supported. */ 2195 if (debug) 2196 addlog(" [rej]"); 2197 break; 2198 } 2199 /* Add the option to rejected list. */ 2200 bcopy (p, r, p[1]); 2201 r += p[1]; 2202 rlen += p[1]; 2203 } 2204 if (rlen) { 2205 if (debug) 2206 addlog(" send conf-rej\n"); 2207 sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2208 goto end; 2209 } else if (debug) 2210 addlog("\n"); 2211 2212 /* 2213 * pass 2: check for option values that are unacceptable and 2214 * thus require to be nak'ed. 2215 */ 2216 if (debug) 2217 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ", 2218 SPP_ARGS(ifp)); 2219 2220 p = (void*) (h+1); 2221 len = origlen; 2222 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2223 if (debug) 2224 addlog(" %s", sppp_lcp_opt_name(*p)); 2225 switch (*p) { 2226 case LCP_OPT_MAGIC: 2227 /* Magic number -- extract. */ 2228 nmagic = (u_int32_t)p[2] << 24 | 2229 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2230 if (nmagic != sp->lcp.magic) { 2231 if (debug) 2232 addlog(" 0x%x", nmagic); 2233 continue; 2234 } 2235 /* 2236 * Local and remote magics equal -- loopback? 2237 */ 2238 if (sp->pp_loopcnt >= MAXALIVECNT*5) { 2239 printf (SPP_FMT "loopback\n", 2240 SPP_ARGS(ifp)); 2241 sp->pp_loopcnt = 0; 2242 if (ifp->if_flags & IFF_UP) { 2243 if_down(ifp); 2244 IF_PURGE(&sp->pp_cpq); 2245 /* XXX ? */ 2246 lcp.Down(sp); 2247 lcp.Up(sp); 2248 } 2249 } else if (debug) 2250 addlog(" [glitch]"); 2251 ++sp->pp_loopcnt; 2252 /* 2253 * We negate our magic here, and NAK it. If 2254 * we see it later in an NAK packet, we 2255 * suggest a new one. 2256 */ 2257 nmagic = ~sp->lcp.magic; 2258 /* Gonna NAK it. */ 2259 p[2] = nmagic >> 24; 2260 p[3] = nmagic >> 16; 2261 p[4] = nmagic >> 8; 2262 p[5] = nmagic; 2263 break; 2264 2265 case LCP_OPT_ASYNC_MAP: 2266 /* Async control character map -- check to be zero. */ 2267 if (! p[2] && ! p[3] && ! p[4] && ! p[5]) { 2268 if (debug) 2269 addlog(" [empty]"); 2270 continue; 2271 } 2272 if (debug) 2273 addlog(" [non-empty]"); 2274 /* suggest a zero one */ 2275 p[2] = p[3] = p[4] = p[5] = 0; 2276 break; 2277 2278 case LCP_OPT_MRU: 2279 /* 2280 * Maximum receive unit. Always agreeable, 2281 * but ignored by now. 2282 */ 2283 sp->lcp.their_mru = p[2] * 256 + p[3]; 2284 if (debug) 2285 addlog(" %ld", sp->lcp.their_mru); 2286 continue; 2287 2288 case LCP_OPT_AUTH_PROTO: 2289 authproto = (p[2] << 8) + p[3]; 2290 if (sp->myauth.proto != authproto) { 2291 /* not agreed, nak */ 2292 if (debug) 2293 addlog(" [mine %s != his %s]", 2294 sppp_proto_name(sp->hisauth.proto), 2295 sppp_proto_name(authproto)); 2296 p[2] = sp->myauth.proto >> 8; 2297 p[3] = sp->myauth.proto; 2298 break; 2299 } 2300 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2301 if (debug) 2302 addlog(" [chap not MD5]"); 2303 p[4] = CHAP_MD5; 2304 break; 2305 } 2306 continue; 2307 } 2308 /* Add the option to nak'ed list. */ 2309 bcopy (p, r, p[1]); 2310 r += p[1]; 2311 rlen += p[1]; 2312 } 2313 if (rlen) { 2314 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2315 if (debug) 2316 addlog(" max_failure (%d) exceeded, " 2317 "send conf-rej\n", 2318 sp->lcp.max_failure); 2319 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2320 } else { 2321 if (debug) 2322 addlog(" send conf-nak\n"); 2323 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2324 } 2325 goto end; 2326 } else { 2327 if (debug) 2328 addlog(" send conf-ack\n"); 2329 sp->fail_counter[IDX_LCP] = 0; 2330 sp->pp_loopcnt = 0; 2331 sppp_cp_send (sp, PPP_LCP, CONF_ACK, 2332 h->ident, origlen, h+1); 2333 } 2334 2335 end: 2336 free (buf, M_TEMP); 2337 return (rlen == 0); 2338 } 2339 2340 /* 2341 * Analyze the LCP Configure-Reject option list, and adjust our 2342 * negotiation. 2343 */ 2344 static void 2345 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2346 { 2347 STDDCL; 2348 u_char *buf, *p; 2349 2350 len -= 4; 2351 buf = malloc (len, M_TEMP, M_NOWAIT); 2352 if (!buf) 2353 return; 2354 2355 if (debug) 2356 log(LOG_DEBUG, SPP_FMT "lcp rej opts:", 2357 SPP_ARGS(ifp)); 2358 2359 p = (void*) (h+1); 2360 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2361 if (debug) 2362 addlog(" %s", sppp_lcp_opt_name(*p)); 2363 switch (*p) { 2364 case LCP_OPT_MAGIC: 2365 /* Magic number -- can't use it, use 0 */ 2366 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2367 sp->lcp.magic = 0; 2368 break; 2369 case LCP_OPT_MRU: 2370 /* 2371 * Should not be rejected anyway, since we only 2372 * negotiate a MRU if explicitly requested by 2373 * peer. 2374 */ 2375 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2376 break; 2377 case LCP_OPT_AUTH_PROTO: 2378 /* 2379 * Peer doesn't want to authenticate himself, 2380 * deny unless this is a dialout call, and 2381 * SPPP_AUTHFLAG_NOCALLOUT is set. 2382 */ 2383 if ((sp->pp_flags & PP_CALLIN) == 0 && 2384 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2385 if (debug) 2386 addlog(" [don't insist on auth " 2387 "for callout]"); 2388 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2389 break; 2390 } 2391 if (debug) 2392 addlog("[access denied]\n"); 2393 lcp.Close(sp); 2394 break; 2395 } 2396 } 2397 if (debug) 2398 addlog("\n"); 2399 free (buf, M_TEMP); 2400 return; 2401 } 2402 2403 /* 2404 * Analyze the LCP Configure-NAK option list, and adjust our 2405 * negotiation. 2406 */ 2407 static void 2408 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2409 { 2410 STDDCL; 2411 u_char *buf, *p; 2412 u_int32_t magic; 2413 2414 len -= 4; 2415 buf = malloc (len, M_TEMP, M_NOWAIT); 2416 if (!buf) 2417 return; 2418 2419 if (debug) 2420 log(LOG_DEBUG, SPP_FMT "lcp nak opts:", 2421 SPP_ARGS(ifp)); 2422 2423 p = (void*) (h+1); 2424 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2425 if (debug) 2426 addlog(" %s", sppp_lcp_opt_name(*p)); 2427 switch (*p) { 2428 case LCP_OPT_MAGIC: 2429 /* Magic number -- renegotiate */ 2430 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2431 len >= 6 && p[1] == 6) { 2432 magic = (u_int32_t)p[2] << 24 | 2433 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2434 /* 2435 * If the remote magic is our negated one, 2436 * this looks like a loopback problem. 2437 * Suggest a new magic to make sure. 2438 */ 2439 if (magic == ~sp->lcp.magic) { 2440 if (debug) 2441 addlog(" magic glitch"); 2442 sp->lcp.magic = random(); 2443 } else { 2444 sp->lcp.magic = magic; 2445 if (debug) 2446 addlog(" %d", magic); 2447 } 2448 } 2449 break; 2450 case LCP_OPT_MRU: 2451 /* 2452 * Peer wants to advise us to negotiate an MRU. 2453 * Agree on it if it's reasonable, or use 2454 * default otherwise. 2455 */ 2456 if (len >= 4 && p[1] == 4) { 2457 u_int mru = p[2] * 256 + p[3]; 2458 if (debug) 2459 addlog(" %d", mru); 2460 if (mru < PP_MTU || mru > PP_MAX_MRU) 2461 mru = PP_MTU; 2462 sp->lcp.mru = mru; 2463 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2464 } 2465 break; 2466 case LCP_OPT_AUTH_PROTO: 2467 /* 2468 * Peer doesn't like our authentication method, 2469 * deny. 2470 */ 2471 if (debug) 2472 addlog("[access denied]\n"); 2473 lcp.Close(sp); 2474 break; 2475 } 2476 } 2477 if (debug) 2478 addlog("\n"); 2479 free (buf, M_TEMP); 2480 return; 2481 } 2482 2483 static void 2484 sppp_lcp_tlu(struct sppp *sp) 2485 { 2486 STDDCL; 2487 int i; 2488 u_int32_t mask; 2489 2490 /* XXX ? */ 2491 if (! (ifp->if_flags & IFF_UP) && 2492 (ifp->if_flags & IFF_RUNNING)) { 2493 /* Coming out of loopback mode. */ 2494 if_up(ifp); 2495 } 2496 2497 for (i = 0; i < IDX_COUNT; i++) 2498 if ((cps[i])->flags & CP_QUAL) 2499 (cps[i])->Open(sp); 2500 2501 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2502 (sp->pp_flags & PP_NEEDAUTH) != 0) 2503 sp->pp_phase = SPPP_PHASE_AUTHENTICATE; 2504 else 2505 sp->pp_phase = SPPP_PHASE_NETWORK; 2506 2507 if(debug) 2508 { 2509 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2510 sppp_phase_name(sp->pp_phase)); 2511 } 2512 2513 /* 2514 * Open all authentication protocols. This is even required 2515 * if we already proceeded to network phase, since it might be 2516 * that remote wants us to authenticate, so we might have to 2517 * send a PAP request. Undesired authentication protocols 2518 * don't do anything when they get an Open event. 2519 */ 2520 for (i = 0; i < IDX_COUNT; i++) 2521 if ((cps[i])->flags & CP_AUTH) 2522 (cps[i])->Open(sp); 2523 2524 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2525 /* Notify all NCPs. */ 2526 for (i = 0; i < IDX_COUNT; i++) 2527 if ((cps[i])->flags & CP_NCP) 2528 (cps[i])->Open(sp); 2529 } 2530 2531 /* Send Up events to all started protos. */ 2532 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2533 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) 2534 (cps[i])->Up(sp); 2535 2536 /* notify low-level driver of state change */ 2537 if (sp->pp_chg) 2538 sp->pp_chg(sp, (int)sp->pp_phase); 2539 2540 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2541 /* if no NCP is starting, close down */ 2542 sppp_lcp_check_and_close(sp); 2543 } 2544 2545 static void 2546 sppp_lcp_tld(struct sppp *sp) 2547 { 2548 STDDCL; 2549 int i; 2550 u_int32_t mask; 2551 2552 sp->pp_phase = SPPP_PHASE_TERMINATE; 2553 2554 if(debug) 2555 { 2556 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2557 sppp_phase_name(sp->pp_phase)); 2558 } 2559 2560 /* 2561 * Take upper layers down. We send the Down event first and 2562 * the Close second to prevent the upper layers from sending 2563 * ``a flurry of terminate-request packets'', as the RFC 2564 * describes it. 2565 */ 2566 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2567 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2568 (cps[i])->Down(sp); 2569 (cps[i])->Close(sp); 2570 } 2571 } 2572 2573 static void 2574 sppp_lcp_tls(struct sppp *sp) 2575 { 2576 STDDCL; 2577 2578 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2579 printf("%s: authentication failed %d times, not retrying again\n", 2580 sp->pp_if.if_xname, sp->pp_auth_failures); 2581 if_down(&sp->pp_if); 2582 return; 2583 } 2584 2585 sp->pp_phase = SPPP_PHASE_ESTABLISH; 2586 2587 if(debug) 2588 { 2589 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2590 sppp_phase_name(sp->pp_phase)); 2591 } 2592 2593 /* Notify lower layer if desired. */ 2594 if (sp->pp_tls) 2595 (sp->pp_tls)(sp); 2596 } 2597 2598 static void 2599 sppp_lcp_tlf(struct sppp *sp) 2600 { 2601 STDDCL; 2602 2603 sp->pp_phase = SPPP_PHASE_DEAD; 2604 2605 if(debug) 2606 { 2607 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2608 sppp_phase_name(sp->pp_phase)); 2609 } 2610 2611 /* Notify lower layer if desired. */ 2612 if (sp->pp_tlf) 2613 (sp->pp_tlf)(sp); 2614 } 2615 2616 static void 2617 sppp_lcp_scr(struct sppp *sp) 2618 { 2619 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2620 int i = 0; 2621 u_short authproto; 2622 2623 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2624 if (! sp->lcp.magic) 2625 sp->lcp.magic = random(); 2626 opt[i++] = LCP_OPT_MAGIC; 2627 opt[i++] = 6; 2628 opt[i++] = sp->lcp.magic >> 24; 2629 opt[i++] = sp->lcp.magic >> 16; 2630 opt[i++] = sp->lcp.magic >> 8; 2631 opt[i++] = sp->lcp.magic; 2632 } 2633 2634 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2635 opt[i++] = LCP_OPT_MRU; 2636 opt[i++] = 4; 2637 opt[i++] = sp->lcp.mru >> 8; 2638 opt[i++] = sp->lcp.mru; 2639 } 2640 2641 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2642 authproto = sp->hisauth.proto; 2643 opt[i++] = LCP_OPT_AUTH_PROTO; 2644 opt[i++] = authproto == PPP_CHAP? 5: 4; 2645 opt[i++] = authproto >> 8; 2646 opt[i++] = authproto; 2647 if (authproto == PPP_CHAP) 2648 opt[i++] = CHAP_MD5; 2649 } 2650 2651 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2652 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2653 } 2654 2655 /* 2656 * Check the open NCPs, return true if at least one NCP is open. 2657 */ 2658 static int 2659 sppp_ncp_check(struct sppp *sp) 2660 { 2661 int i, mask; 2662 2663 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2664 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2665 return 1; 2666 return 0; 2667 } 2668 2669 /* 2670 * Re-check the open NCPs and see if we should terminate the link. 2671 * Called by the NCPs during their tlf action handling. 2672 */ 2673 static void 2674 sppp_lcp_check_and_close(struct sppp *sp) 2675 { 2676 2677 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2678 /* don't bother, we are already going down */ 2679 return; 2680 2681 if (sppp_ncp_check(sp)) 2682 return; 2683 2684 lcp.Close(sp); 2685 } 2686 2687 2688 /* 2689 *--------------------------------------------------------------------------* 2690 * * 2691 * The IPCP implementation. * 2692 * * 2693 *--------------------------------------------------------------------------* 2694 */ 2695 2696 static void 2697 sppp_ipcp_init(struct sppp *sp) 2698 { 2699 sp->ipcp.opts = 0; 2700 sp->ipcp.flags = 0; 2701 sp->state[IDX_IPCP] = STATE_INITIAL; 2702 sp->fail_counter[IDX_IPCP] = 0; 2703 sp->pp_seq[IDX_IPCP] = 0; 2704 sp->pp_rseq[IDX_IPCP] = 0; 2705 callout_init(&sp->ch[IDX_IPCP]); 2706 } 2707 2708 static void 2709 sppp_ipcp_up(struct sppp *sp) 2710 { 2711 sppp_up_event(&ipcp, sp); 2712 } 2713 2714 static void 2715 sppp_ipcp_down(struct sppp *sp) 2716 { 2717 sppp_down_event(&ipcp, sp); 2718 } 2719 2720 static void 2721 sppp_ipcp_open(struct sppp *sp) 2722 { 2723 STDDCL; 2724 u_int32_t myaddr, hisaddr; 2725 2726 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 2727 sp->ipcp.req_myaddr = 0; 2728 sp->ipcp.req_hisaddr = 0; 2729 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 2730 2731 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 2732 /* 2733 * If we don't have his address, this probably means our 2734 * interface doesn't want to talk IP at all. (This could 2735 * be the case if somebody wants to speak only IPX, for 2736 * example.) Don't open IPCP in this case. 2737 */ 2738 if (hisaddr == 0L) { 2739 /* XXX this message should go away */ 2740 if (debug) 2741 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n", 2742 SPP_ARGS(ifp)); 2743 return; 2744 } 2745 2746 if (myaddr == 0) { 2747 /* 2748 * I don't have an assigned address, so i need to 2749 * negotiate my address. 2750 */ 2751 sp->ipcp.flags |= IPCP_MYADDR_DYN; 2752 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2753 } 2754 if (hisaddr == 1) { 2755 /* 2756 * XXX - remove this hack! 2757 * remote has no valid adress, we need to get one assigned. 2758 */ 2759 sp->ipcp.flags |= IPCP_HISADDR_DYN; 2760 } 2761 sppp_open_event(&ipcp, sp); 2762 } 2763 2764 static void 2765 sppp_ipcp_close(struct sppp *sp) 2766 { 2767 sppp_close_event(&ipcp, sp); 2768 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 2769 /* 2770 * Some address was dynamic, clear it again. 2771 */ 2772 sppp_clear_ip_addrs(sp); 2773 } 2774 2775 static void 2776 sppp_ipcp_TO(void *cookie) 2777 { 2778 sppp_to_event(&ipcp, (struct sppp *)cookie); 2779 } 2780 2781 /* 2782 * Analyze a configure request. Return true if it was agreeable, and 2783 * caused action sca, false if it has been rejected or nak'ed, and 2784 * caused action scn. (The return value is used to make the state 2785 * transition decision in the state automaton.) 2786 */ 2787 static int 2788 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2789 { 2790 u_char *buf, *r, *p; 2791 struct ifnet *ifp = &sp->pp_if; 2792 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 2793 u_int32_t hisaddr, desiredaddr; 2794 2795 len -= 4; 2796 origlen = len; 2797 /* 2798 * Make sure to allocate a buf that can at least hold a 2799 * conf-nak with an `address' option. We might need it below. 2800 */ 2801 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 2802 if (! buf) 2803 return (0); 2804 2805 /* pass 1: see if we can recognize them */ 2806 if (debug) 2807 log(LOG_DEBUG, SPP_FMT "ipcp parse opts:", 2808 SPP_ARGS(ifp)); 2809 p = (void*) (h+1); 2810 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2811 if (debug) 2812 addlog(" %s", sppp_ipcp_opt_name(*p)); 2813 switch (*p) { 2814 #ifdef notyet 2815 case IPCP_OPT_COMPRESSION: 2816 if (len >= 6 && p[1] >= 6) { 2817 /* correctly formed compress option */ 2818 continue; 2819 } 2820 if (debug) 2821 addlog(" [invalid]"); 2822 break; 2823 #endif 2824 case IPCP_OPT_ADDRESS: 2825 if (len >= 6 && p[1] == 6) { 2826 /* correctly formed address option */ 2827 continue; 2828 } 2829 if (debug) 2830 addlog(" [invalid]"); 2831 break; 2832 default: 2833 /* Others not supported. */ 2834 if (debug) 2835 addlog(" [rej]"); 2836 break; 2837 } 2838 /* Add the option to rejected list. */ 2839 bcopy (p, r, p[1]); 2840 r += p[1]; 2841 rlen += p[1]; 2842 } 2843 if (rlen) { 2844 if (debug) 2845 addlog(" send conf-rej\n"); 2846 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 2847 goto end; 2848 } else if (debug) 2849 addlog("\n"); 2850 2851 /* pass 2: parse option values */ 2852 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 2853 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 2854 else 2855 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 2856 if (debug) 2857 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ", 2858 SPP_ARGS(ifp)); 2859 p = (void*) (h+1); 2860 len = origlen; 2861 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2862 if (debug) 2863 addlog(" %s", sppp_ipcp_opt_name(*p)); 2864 switch (*p) { 2865 #ifdef notyet 2866 case IPCP_OPT_COMPRESSION: 2867 continue; 2868 #endif 2869 case IPCP_OPT_ADDRESS: 2870 desiredaddr = p[2] << 24 | p[3] << 16 | 2871 p[4] << 8 | p[5]; 2872 if (desiredaddr == hisaddr || 2873 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 2874 /* 2875 * Peer's address is same as our value, 2876 * this is agreeable. Gonna conf-ack 2877 * it. 2878 */ 2879 if (debug) 2880 addlog(" %s [ack]", 2881 sppp_dotted_quad(hisaddr)); 2882 /* record that we've seen it already */ 2883 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 2884 sp->ipcp.req_hisaddr = desiredaddr; 2885 hisaddr = desiredaddr; 2886 continue; 2887 } 2888 /* 2889 * The address wasn't agreeable. This is either 2890 * he sent us 0.0.0.0, asking to assign him an 2891 * address, or he send us another address not 2892 * matching our value. Either case, we gonna 2893 * conf-nak it with our value. 2894 */ 2895 if (debug) { 2896 if (desiredaddr == 0) 2897 addlog(" [addr requested]"); 2898 else 2899 addlog(" %s [not agreed]", 2900 sppp_dotted_quad(desiredaddr)); 2901 } 2902 2903 p[2] = hisaddr >> 24; 2904 p[3] = hisaddr >> 16; 2905 p[4] = hisaddr >> 8; 2906 p[5] = hisaddr; 2907 break; 2908 } 2909 /* Add the option to nak'ed list. */ 2910 bcopy (p, r, p[1]); 2911 r += p[1]; 2912 rlen += p[1]; 2913 } 2914 2915 /* 2916 * If we are about to conf-ack the request, but haven't seen 2917 * his address so far, gonna conf-nak it instead, with the 2918 * `address' option present and our idea of his address being 2919 * filled in there, to request negotiation of both addresses. 2920 * 2921 * XXX This can result in an endless req - nak loop if peer 2922 * doesn't want to send us his address. Q: What should we do 2923 * about it? XXX A: implement the max-failure counter. 2924 */ 2925 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 2926 buf[0] = IPCP_OPT_ADDRESS; 2927 buf[1] = 6; 2928 buf[2] = hisaddr >> 24; 2929 buf[3] = hisaddr >> 16; 2930 buf[4] = hisaddr >> 8; 2931 buf[5] = hisaddr; 2932 rlen = 6; 2933 if (debug) 2934 addlog(" still need hisaddr"); 2935 } 2936 2937 if (rlen) { 2938 if (debug) 2939 addlog(" send conf-nak\n"); 2940 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 2941 } else { 2942 if (debug) 2943 addlog(" send conf-ack\n"); 2944 sppp_cp_send (sp, PPP_IPCP, CONF_ACK, 2945 h->ident, origlen, h+1); 2946 } 2947 2948 end: 2949 free (buf, M_TEMP); 2950 return (rlen == 0); 2951 } 2952 2953 /* 2954 * Analyze the IPCP Configure-Reject option list, and adjust our 2955 * negotiation. 2956 */ 2957 static void 2958 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2959 { 2960 u_char *buf, *p; 2961 struct ifnet *ifp = &sp->pp_if; 2962 int debug = ifp->if_flags & IFF_DEBUG; 2963 2964 len -= 4; 2965 buf = malloc (len, M_TEMP, M_NOWAIT); 2966 if (!buf) 2967 return; 2968 2969 if (debug) 2970 log(LOG_DEBUG, SPP_FMT "ipcp rej opts:", 2971 SPP_ARGS(ifp)); 2972 2973 p = (void*) (h+1); 2974 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2975 if (debug) 2976 addlog(" %s", sppp_ipcp_opt_name(*p)); 2977 switch (*p) { 2978 case IPCP_OPT_ADDRESS: 2979 /* 2980 * Peer doesn't grok address option. This is 2981 * bad. XXX Should we better give up here? 2982 */ 2983 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 2984 break; 2985 #ifdef notyet 2986 case IPCP_OPT_COMPRESS: 2987 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 2988 break; 2989 #endif 2990 } 2991 } 2992 if (debug) 2993 addlog("\n"); 2994 free (buf, M_TEMP); 2995 return; 2996 } 2997 2998 /* 2999 * Analyze the IPCP Configure-NAK option list, and adjust our 3000 * negotiation. 3001 */ 3002 static void 3003 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3004 { 3005 u_char *p; 3006 struct ifnet *ifp = &sp->pp_if; 3007 int debug = ifp->if_flags & IFF_DEBUG; 3008 u_int32_t wantaddr; 3009 3010 len -= 4; 3011 3012 if (debug) 3013 log(LOG_DEBUG, SPP_FMT "ipcp nak opts:", 3014 SPP_ARGS(ifp)); 3015 3016 p = (void*) (h+1); 3017 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3018 if (debug) 3019 addlog(" %s", sppp_ipcp_opt_name(*p)); 3020 switch (*p) { 3021 case IPCP_OPT_ADDRESS: 3022 /* 3023 * Peer doesn't like our local IP address. See 3024 * if we can do something for him. We'll drop 3025 * him our address then. 3026 */ 3027 if (len >= 6 && p[1] == 6) { 3028 wantaddr = p[2] << 24 | p[3] << 16 | 3029 p[4] << 8 | p[5]; 3030 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3031 if (debug) 3032 addlog(" [wantaddr %s]", 3033 sppp_dotted_quad(wantaddr)); 3034 /* 3035 * When doing dynamic address assignment, 3036 * we accept his offer. Otherwise, we 3037 * ignore it and thus continue to negotiate 3038 * our already existing value. 3039 */ 3040 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3041 if (debug) 3042 addlog(" [agree]"); 3043 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3044 sp->ipcp.req_myaddr = wantaddr; 3045 } 3046 } 3047 break; 3048 3049 case IPCP_OPT_PRIMDNS: 3050 if (len >= 6 && p[1] == 6) { 3051 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3052 p[4] << 8 | p[5]; 3053 } 3054 break; 3055 3056 case IPCP_OPT_SECDNS: 3057 if (len >= 6 && p[1] == 6) { 3058 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3059 p[4] << 8 | p[5]; 3060 } 3061 break; 3062 #ifdef notyet 3063 case IPCP_OPT_COMPRESS: 3064 /* 3065 * Peer wants different compression parameters. 3066 */ 3067 break; 3068 #endif 3069 } 3070 } 3071 if (debug) 3072 addlog("\n"); 3073 return; 3074 } 3075 3076 static void 3077 sppp_ipcp_tlu(struct sppp *sp) 3078 { 3079 /* we are up. Set addresses and notify anyone interested */ 3080 u_int32_t myaddr, hisaddr; 3081 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3082 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 3083 myaddr = sp->ipcp.req_myaddr; 3084 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 3085 hisaddr = sp->ipcp.req_hisaddr; 3086 sppp_set_ip_addrs(sp, myaddr, hisaddr); 3087 if (sp->pp_con) 3088 sp->pp_con(sp); 3089 } 3090 3091 static void 3092 sppp_ipcp_tld(struct sppp *sp) 3093 { 3094 } 3095 3096 static void 3097 sppp_ipcp_tls(struct sppp *sp) 3098 { 3099 /* indicate to LCP that it must stay alive */ 3100 sp->lcp.protos |= (1 << IDX_IPCP); 3101 } 3102 3103 static void 3104 sppp_ipcp_tlf(struct sppp *sp) 3105 { 3106 /* we no longer need LCP */ 3107 sp->lcp.protos &= ~(1 << IDX_IPCP); 3108 } 3109 3110 static void 3111 sppp_ipcp_scr(struct sppp *sp) 3112 { 3113 char opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3114 u_int32_t ouraddr; 3115 int i = 0; 3116 3117 #ifdef notyet 3118 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3119 opt[i++] = IPCP_OPT_COMPRESSION; 3120 opt[i++] = 6; 3121 opt[i++] = 0; /* VJ header compression */ 3122 opt[i++] = 0x2d; /* VJ header compression */ 3123 opt[i++] = max_slot_id; 3124 opt[i++] = comp_slot_id; 3125 } 3126 #endif 3127 3128 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3129 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3130 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3131 else 3132 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3133 opt[i++] = IPCP_OPT_ADDRESS; 3134 opt[i++] = 6; 3135 opt[i++] = ouraddr >> 24; 3136 opt[i++] = ouraddr >> 16; 3137 opt[i++] = ouraddr >> 8; 3138 opt[i++] = ouraddr; 3139 } 3140 3141 if (sp->query_dns & 1) { 3142 opt[i++] = IPCP_OPT_PRIMDNS; 3143 opt[i++] = 6; 3144 opt[i++] = sp->dns_addrs[0] >> 24; 3145 opt[i++] = sp->dns_addrs[0] >> 16; 3146 opt[i++] = sp->dns_addrs[0] >> 8; 3147 opt[i++] = sp->dns_addrs[0]; 3148 } 3149 if (sp->query_dns & 2) { 3150 opt[i++] = IPCP_OPT_SECDNS; 3151 opt[i++] = 6; 3152 opt[i++] = sp->dns_addrs[1] >> 24; 3153 opt[i++] = sp->dns_addrs[1] >> 16; 3154 opt[i++] = sp->dns_addrs[1] >> 8; 3155 opt[i++] = sp->dns_addrs[1]; 3156 } 3157 3158 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3159 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3160 } 3161 3162 3163 /* 3164 *--------------------------------------------------------------------------* 3165 * * 3166 * The IPv6CP implementation. * 3167 * * 3168 *--------------------------------------------------------------------------* 3169 */ 3170 3171 #ifdef INET6 3172 static void 3173 sppp_ipv6cp_init(struct sppp *sp) 3174 { 3175 sp->ipv6cp.opts = 0; 3176 sp->ipv6cp.flags = 0; 3177 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3178 sp->fail_counter[IDX_IPV6CP] = 0; 3179 sp->pp_seq[IDX_IPV6CP] = 0; 3180 sp->pp_rseq[IDX_IPV6CP] = 0; 3181 callout_init(&sp->ch[IDX_IPV6CP]); 3182 } 3183 3184 static void 3185 sppp_ipv6cp_up(struct sppp *sp) 3186 { 3187 sppp_up_event(&ipv6cp, sp); 3188 } 3189 3190 static void 3191 sppp_ipv6cp_down(struct sppp *sp) 3192 { 3193 sppp_down_event(&ipv6cp, sp); 3194 } 3195 3196 static void 3197 sppp_ipv6cp_open(struct sppp *sp) 3198 { 3199 STDDCL; 3200 struct in6_addr myaddr, hisaddr; 3201 3202 #ifdef IPV6CP_MYIFID_DYN 3203 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3204 #else 3205 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3206 #endif 3207 3208 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3209 /* 3210 * If we don't have our address, this probably means our 3211 * interface doesn't want to talk IPv6 at all. (This could 3212 * be the case if somebody wants to speak only IPX, for 3213 * example.) Don't open IPv6CP in this case. 3214 */ 3215 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3216 /* XXX this message should go away */ 3217 if (debug) 3218 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n", 3219 SPP_ARGS(ifp)); 3220 return; 3221 } 3222 3223 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3224 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3225 sppp_open_event(&ipv6cp, sp); 3226 } 3227 3228 static void 3229 sppp_ipv6cp_close(struct sppp *sp) 3230 { 3231 sppp_close_event(&ipv6cp, sp); 3232 } 3233 3234 static void 3235 sppp_ipv6cp_TO(void *cookie) 3236 { 3237 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3238 } 3239 3240 /* 3241 * Analyze a configure request. Return true if it was agreeable, and 3242 * caused action sca, false if it has been rejected or nak'ed, and 3243 * caused action scn. (The return value is used to make the state 3244 * transition decision in the state automaton.) 3245 */ 3246 static int 3247 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3248 { 3249 u_char *buf, *r, *p; 3250 struct ifnet *ifp = &sp->pp_if; 3251 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3252 struct in6_addr myaddr, desiredaddr, suggestaddr; 3253 int ifidcount; 3254 int type; 3255 int collision, nohisaddr; 3256 3257 len -= 4; 3258 origlen = len; 3259 /* 3260 * Make sure to allocate a buf that can at least hold a 3261 * conf-nak with an `address' option. We might need it below. 3262 */ 3263 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 3264 if (! buf) 3265 return (0); 3266 3267 /* pass 1: see if we can recognize them */ 3268 if (debug) 3269 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:", 3270 SPP_ARGS(ifp)); 3271 p = (void*) (h+1); 3272 ifidcount = 0; 3273 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3274 if (debug) 3275 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3276 switch (*p) { 3277 case IPV6CP_OPT_IFID: 3278 if (len >= 10 && p[1] == 10 && ifidcount == 0) { 3279 /* correctly formed address option */ 3280 ifidcount++; 3281 continue; 3282 } 3283 if (debug) 3284 addlog(" [invalid]"); 3285 break; 3286 #ifdef notyet 3287 case IPV6CP_OPT_COMPRESSION: 3288 if (len >= 4 && p[1] >= 4) { 3289 /* correctly formed compress option */ 3290 continue; 3291 } 3292 if (debug) 3293 addlog(" [invalid]"); 3294 break; 3295 #endif 3296 default: 3297 /* Others not supported. */ 3298 if (debug) 3299 addlog(" [rej]"); 3300 break; 3301 } 3302 /* Add the option to rejected list. */ 3303 bcopy (p, r, p[1]); 3304 r += p[1]; 3305 rlen += p[1]; 3306 } 3307 if (rlen) { 3308 if (debug) 3309 addlog(" send conf-rej\n"); 3310 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3311 goto end; 3312 } else if (debug) 3313 addlog("\n"); 3314 3315 /* pass 2: parse option values */ 3316 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3317 if (debug) 3318 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ", 3319 SPP_ARGS(ifp)); 3320 p = (void*) (h+1); 3321 len = origlen; 3322 type = CONF_ACK; 3323 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3324 if (debug) 3325 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3326 switch (*p) { 3327 #ifdef notyet 3328 case IPV6CP_OPT_COMPRESSION: 3329 continue; 3330 #endif 3331 case IPV6CP_OPT_IFID: 3332 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3333 bcopy(&p[2], &desiredaddr.s6_addr[8], 8); 3334 collision = (memcmp(&desiredaddr.s6_addr[8], 3335 &myaddr.s6_addr[8], 8) == 0); 3336 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3337 3338 desiredaddr.s6_addr16[0] = htons(0xfe80); 3339 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3340 3341 if (!collision && !nohisaddr) { 3342 /* no collision, hisaddr known - Conf-Ack */ 3343 type = CONF_ACK; 3344 3345 if (debug) { 3346 addlog(" %s [%s]", 3347 ip6_sprintf(&desiredaddr), 3348 sppp_cp_type_name(type)); 3349 } 3350 continue; 3351 } 3352 3353 memset(&suggestaddr, 0, sizeof(&suggestaddr)); 3354 if (collision && nohisaddr) { 3355 /* collision, hisaddr unknown - Conf-Rej */ 3356 type = CONF_REJ; 3357 memset(&p[2], 0, 8); 3358 } else { 3359 /* 3360 * - no collision, hisaddr unknown, or 3361 * - collision, hisaddr known 3362 * Conf-Nak, suggest hisaddr 3363 */ 3364 type = CONF_NAK; 3365 sppp_suggest_ip6_addr(sp, &suggestaddr); 3366 bcopy(&suggestaddr.s6_addr[8], &p[2], 8); 3367 } 3368 if (debug) 3369 addlog(" %s [%s]", ip6_sprintf(&desiredaddr), 3370 sppp_cp_type_name(type)); 3371 break; 3372 } 3373 /* Add the option to nak'ed list. */ 3374 bcopy (p, r, p[1]); 3375 r += p[1]; 3376 rlen += p[1]; 3377 } 3378 3379 if (rlen == 0 && type == CONF_ACK) { 3380 if (debug) 3381 addlog(" send %s\n", sppp_cp_type_name(type)); 3382 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1); 3383 } else { 3384 #ifdef notdef 3385 if (type == CONF_ACK) 3386 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3387 #endif 3388 3389 if (debug) { 3390 addlog(" send %s suggest %s\n", 3391 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); 3392 } 3393 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3394 } 3395 3396 end: 3397 free (buf, M_TEMP); 3398 return (rlen == 0); 3399 } 3400 3401 /* 3402 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3403 * negotiation. 3404 */ 3405 static void 3406 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3407 { 3408 u_char *buf, *p; 3409 struct ifnet *ifp = &sp->pp_if; 3410 int debug = ifp->if_flags & IFF_DEBUG; 3411 3412 len -= 4; 3413 buf = malloc (len, M_TEMP, M_NOWAIT); 3414 if (!buf) 3415 return; 3416 3417 if (debug) 3418 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:", 3419 SPP_ARGS(ifp)); 3420 3421 p = (void*) (h+1); 3422 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3423 if (debug) 3424 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3425 switch (*p) { 3426 case IPV6CP_OPT_IFID: 3427 /* 3428 * Peer doesn't grok address option. This is 3429 * bad. XXX Should we better give up here? 3430 */ 3431 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3432 break; 3433 #ifdef notyet 3434 case IPV6CP_OPT_COMPRESS: 3435 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3436 break; 3437 #endif 3438 } 3439 } 3440 if (debug) 3441 addlog("\n"); 3442 free (buf, M_TEMP); 3443 return; 3444 } 3445 3446 /* 3447 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3448 * negotiation. 3449 */ 3450 static void 3451 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3452 { 3453 u_char *buf, *p; 3454 struct ifnet *ifp = &sp->pp_if; 3455 int debug = ifp->if_flags & IFF_DEBUG; 3456 struct in6_addr suggestaddr; 3457 3458 len -= 4; 3459 buf = malloc (len, M_TEMP, M_NOWAIT); 3460 if (!buf) 3461 return; 3462 3463 if (debug) 3464 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:", 3465 SPP_ARGS(ifp)); 3466 3467 p = (void*) (h+1); 3468 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3469 if (debug) 3470 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3471 switch (*p) { 3472 case IPV6CP_OPT_IFID: 3473 /* 3474 * Peer doesn't like our local ifid. See 3475 * if we can do something for him. We'll drop 3476 * him our address then. 3477 */ 3478 if (len < 10 || p[1] != 10) 3479 break; 3480 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3481 suggestaddr.s6_addr16[0] = htons(0xfe80); 3482 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3483 bcopy(&p[2], &suggestaddr.s6_addr[8], 8); 3484 3485 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3486 if (debug) 3487 addlog(" [suggestaddr %s]", 3488 ip6_sprintf(&suggestaddr)); 3489 #ifdef IPV6CP_MYIFID_DYN 3490 /* 3491 * When doing dynamic address assignment, 3492 * we accept his offer. 3493 */ 3494 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3495 struct in6_addr lastsuggest; 3496 /* 3497 * If <suggested myaddr from peer> equals to 3498 * <hisaddr we have suggested last time>, 3499 * we have a collision. generate new random 3500 * ifid. 3501 */ 3502 sppp_suggest_ip6_addr(&lastsuggest); 3503 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3504 lastsuggest)) { 3505 if (debug) 3506 addlog(" [random]"); 3507 sppp_gen_ip6_addr(sp, &suggestaddr); 3508 } 3509 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3510 if (debug) 3511 addlog(" [agree]"); 3512 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3513 } 3514 #else 3515 /* 3516 * Since we do not do dynamic address assignment, 3517 * we ignore it and thus continue to negotiate 3518 * our already existing value. This can possibly 3519 * go into infinite request-reject loop. 3520 * 3521 * This is not likely because we normally use 3522 * ifid based on MAC-address. 3523 * If you have no ethernet card on the node, too bad. 3524 * XXX should we use fail_counter? 3525 */ 3526 #endif 3527 break; 3528 #ifdef notyet 3529 case IPV6CP_OPT_COMPRESS: 3530 /* 3531 * Peer wants different compression parameters. 3532 */ 3533 break; 3534 #endif 3535 } 3536 } 3537 if (debug) 3538 addlog("\n"); 3539 free (buf, M_TEMP); 3540 return; 3541 } 3542 3543 static void 3544 sppp_ipv6cp_tlu(struct sppp *sp) 3545 { 3546 /* we are up - notify isdn daemon */ 3547 if (sp->pp_con) 3548 sp->pp_con(sp); 3549 } 3550 3551 static void 3552 sppp_ipv6cp_tld(struct sppp *sp) 3553 { 3554 } 3555 3556 static void 3557 sppp_ipv6cp_tls(struct sppp *sp) 3558 { 3559 /* indicate to LCP that it must stay alive */ 3560 sp->lcp.protos |= (1 << IDX_IPV6CP); 3561 } 3562 3563 static void 3564 sppp_ipv6cp_tlf(struct sppp *sp) 3565 { 3566 /* we no longer need LCP */ 3567 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3568 } 3569 3570 static void 3571 sppp_ipv6cp_scr(struct sppp *sp) 3572 { 3573 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3574 struct in6_addr ouraddr; 3575 int i = 0; 3576 3577 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3578 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3579 opt[i++] = IPV6CP_OPT_IFID; 3580 opt[i++] = 10; 3581 bcopy(&ouraddr.s6_addr[8], &opt[i], 8); 3582 i += 8; 3583 } 3584 3585 #ifdef notyet 3586 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3587 opt[i++] = IPV6CP_OPT_COMPRESSION; 3588 opt[i++] = 4; 3589 opt[i++] = 0; /* TBD */ 3590 opt[i++] = 0; /* TBD */ 3591 /* variable length data may follow */ 3592 } 3593 #endif 3594 3595 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3596 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 3597 } 3598 #else /*INET6*/ 3599 static void sppp_ipv6cp_init(struct sppp *sp) 3600 { 3601 } 3602 3603 static void sppp_ipv6cp_up(struct sppp *sp) 3604 { 3605 } 3606 3607 static void sppp_ipv6cp_down(struct sppp *sp) 3608 { 3609 } 3610 3611 3612 static void sppp_ipv6cp_open(struct sppp *sp) 3613 { 3614 } 3615 3616 static void sppp_ipv6cp_close(struct sppp *sp) 3617 { 3618 } 3619 3620 static void sppp_ipv6cp_TO(void *sp) 3621 { 3622 } 3623 3624 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3625 { 3626 return 0; 3627 } 3628 3629 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3630 { 3631 } 3632 3633 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3634 { 3635 } 3636 3637 static void sppp_ipv6cp_tlu(struct sppp *sp) 3638 { 3639 } 3640 3641 static void sppp_ipv6cp_tld(struct sppp *sp) 3642 { 3643 } 3644 3645 static void sppp_ipv6cp_tls(struct sppp *sp) 3646 { 3647 } 3648 3649 static void sppp_ipv6cp_tlf(struct sppp *sp) 3650 { 3651 } 3652 3653 static void sppp_ipv6cp_scr(struct sppp *sp) 3654 { 3655 } 3656 #endif /*INET6*/ 3657 3658 3659 /* 3660 *--------------------------------------------------------------------------* 3661 * * 3662 * The CHAP implementation. * 3663 * * 3664 *--------------------------------------------------------------------------* 3665 */ 3666 3667 /* 3668 * The authentication protocols don't employ a full-fledged state machine as 3669 * the control protocols do, since they do have Open and Close events, but 3670 * not Up and Down, nor are they explicitly terminated. Also, use of the 3671 * authentication protocols may be different in both directions (this makes 3672 * sense, think of a machine that never accepts incoming calls but only 3673 * calls out, it doesn't require the called party to authenticate itself). 3674 * 3675 * Our state machine for the local authentication protocol (we are requesting 3676 * the peer to authenticate) looks like: 3677 * 3678 * RCA- 3679 * +--------------------------------------------+ 3680 * V scn,tld| 3681 * +--------+ Close +---------+ RCA+ 3682 * | |<----------------------------------| |------+ 3683 * +--->| Closed | TO* | Opened | sca | 3684 * | | |-----+ +-------| |<-----+ 3685 * | +--------+ irc | | +---------+ 3686 * | ^ | | ^ 3687 * | | | | | 3688 * | | | | | 3689 * | TO-| | | | 3690 * | |tld TO+ V | | 3691 * | | +------->+ | | 3692 * | | | | | | 3693 * | +--------+ V | | 3694 * | | |<----+<--------------------+ | 3695 * | | Req- | scr | 3696 * | | Sent | | 3697 * | | | | 3698 * | +--------+ | 3699 * | RCA- | | RCA+ | 3700 * +------+ +------------------------------------------+ 3701 * scn,tld sca,irc,ict,tlu 3702 * 3703 * 3704 * with: 3705 * 3706 * Open: LCP reached authentication phase 3707 * Close: LCP reached terminate phase 3708 * 3709 * RCA+: received reply (pap-req, chap-response), acceptable 3710 * RCN: received reply (pap-req, chap-response), not acceptable 3711 * TO+: timeout with restart counter >= 0 3712 * TO-: timeout with restart counter < 0 3713 * TO*: reschedule timeout for CHAP 3714 * 3715 * scr: send request packet (none for PAP, chap-challenge) 3716 * sca: send ack packet (pap-ack, chap-success) 3717 * scn: send nak packet (pap-nak, chap-failure) 3718 * ict: initialize re-challenge timer (CHAP only) 3719 * 3720 * tlu: this-layer-up, LCP reaches network phase 3721 * tld: this-layer-down, LCP enters terminate phase 3722 * 3723 * Note that in CHAP mode, after sending a new challenge, while the state 3724 * automaton falls back into Req-Sent state, it doesn't signal a tld 3725 * event to LCP, so LCP remains in network phase. Only after not getting 3726 * any response (or after getting an unacceptable response), CHAP closes, 3727 * causing LCP to enter terminate phase. 3728 * 3729 * With PAP, there is no initial request that can be sent. The peer is 3730 * expected to send one based on the successful negotiation of PAP as 3731 * the authentication protocol during the LCP option negotiation. 3732 * 3733 * Incoming authentication protocol requests (remote requests 3734 * authentication, we are peer) don't employ a state machine at all, 3735 * they are simply answered. Some peers [Ascend P50 firmware rev 3736 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 3737 * still in authentication phase (thereby violating the standard that 3738 * demands that these NCP packets are to be discarded), so we keep 3739 * track of the peer demanding us to authenticate, and only proceed to 3740 * phase network once we've seen a positive acknowledge for the 3741 * authentication. 3742 */ 3743 3744 /* 3745 * Handle incoming CHAP packets. 3746 */ 3747 void 3748 sppp_chap_input(struct sppp *sp, struct mbuf *m) 3749 { 3750 STDDCL; 3751 struct lcp_header *h; 3752 int len, x; 3753 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 3754 int value_len, name_len; 3755 MD5_CTX ctx; 3756 3757 len = m->m_pkthdr.len; 3758 if (len < 4) { 3759 if (debug) 3760 log(LOG_DEBUG, 3761 SPP_FMT "chap invalid packet length: %d bytes\n", 3762 SPP_ARGS(ifp), len); 3763 return; 3764 } 3765 h = mtod (m, struct lcp_header*); 3766 if (len > ntohs (h->len)) 3767 len = ntohs (h->len); 3768 3769 switch (h->type) { 3770 /* challenge, failure and success are his authproto */ 3771 case CHAP_CHALLENGE: 3772 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 3773 /* can't do anything usefull */ 3774 sp->pp_auth_failures++; 3775 printf(SPP_FMT "chap input without my name and my secret being set\n", 3776 SPP_ARGS(ifp)); 3777 break; 3778 } 3779 value = 1 + (u_char*)(h+1); 3780 value_len = value[-1]; 3781 name = value + value_len; 3782 name_len = len - value_len - 5; 3783 if (name_len < 0) { 3784 if (debug) { 3785 log(LOG_DEBUG, 3786 SPP_FMT "chap corrupted challenge " 3787 "<%s id=0x%x len=%d", 3788 SPP_ARGS(ifp), 3789 sppp_auth_type_name(PPP_CHAP, h->type), 3790 h->ident, ntohs(h->len)); 3791 if (len > 4) 3792 sppp_print_bytes((u_char*) (h+1), len-4); 3793 addlog(">\n"); 3794 } 3795 break; 3796 } 3797 3798 if (debug) { 3799 log(LOG_DEBUG, 3800 SPP_FMT "chap input <%s id=0x%x len=%d name=", 3801 SPP_ARGS(ifp), 3802 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 3803 ntohs(h->len)); 3804 sppp_print_string((char*) name, name_len); 3805 addlog(" value-size=%d value=", value_len); 3806 sppp_print_bytes(value, value_len); 3807 addlog(">\n"); 3808 } 3809 3810 /* Compute reply value. */ 3811 MD5Init(&ctx); 3812 MD5Update(&ctx, &h->ident, 1); 3813 MD5Update(&ctx, sp->myauth.secret, strlen(sp->myauth.secret)); 3814 MD5Update(&ctx, value, value_len); 3815 MD5Final(digest, &ctx); 3816 dsize = sizeof digest; 3817 3818 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 3819 sizeof dsize, (const char *)&dsize, 3820 sizeof digest, digest, 3821 strlen(sp->myauth.name), 3822 sp->myauth.name, 3823 0); 3824 break; 3825 3826 case CHAP_SUCCESS: 3827 if (debug) { 3828 log(LOG_DEBUG, SPP_FMT "chap success", 3829 SPP_ARGS(ifp)); 3830 if (len > 4) { 3831 addlog(": "); 3832 sppp_print_string((char*)(h + 1), len - 4); 3833 } 3834 addlog("\n"); 3835 } 3836 x = splnet(); 3837 sp->pp_auth_failures = 0; 3838 sp->pp_flags &= ~PP_NEEDAUTH; 3839 if (sp->myauth.proto == PPP_CHAP && 3840 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 3841 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 3842 /* 3843 * We are authenticator for CHAP but didn't 3844 * complete yet. Leave it to tlu to proceed 3845 * to network phase. 3846 */ 3847 splx(x); 3848 break; 3849 } 3850 splx(x); 3851 sppp_phase_network(sp); 3852 break; 3853 3854 case CHAP_FAILURE: 3855 x = splnet(); 3856 sp->pp_auth_failures++; 3857 splx(x); 3858 if (debug) { 3859 log(LOG_INFO, SPP_FMT "chap failure", 3860 SPP_ARGS(ifp)); 3861 if (len > 4) { 3862 addlog(": "); 3863 sppp_print_string((char*)(h + 1), len - 4); 3864 } 3865 addlog("\n"); 3866 } else 3867 log(LOG_INFO, SPP_FMT "chap failure\n", 3868 SPP_ARGS(ifp)); 3869 /* await LCP shutdown by authenticator */ 3870 break; 3871 3872 /* response is my authproto */ 3873 case CHAP_RESPONSE: 3874 if (sp->hisauth.secret == NULL) { 3875 /* can't do anything usefull */ 3876 printf(SPP_FMT "chap input without his secret being set\n", 3877 SPP_ARGS(ifp)); 3878 break; 3879 } 3880 value = 1 + (u_char*)(h+1); 3881 value_len = value[-1]; 3882 name = value + value_len; 3883 name_len = len - value_len - 5; 3884 if (name_len < 0) { 3885 if (debug) { 3886 log(LOG_DEBUG, 3887 SPP_FMT "chap corrupted response " 3888 "<%s id=0x%x len=%d", 3889 SPP_ARGS(ifp), 3890 sppp_auth_type_name(PPP_CHAP, h->type), 3891 h->ident, ntohs(h->len)); 3892 if (len > 4) 3893 sppp_print_bytes((u_char*)(h+1), len-4); 3894 addlog(">\n"); 3895 } 3896 break; 3897 } 3898 if (h->ident != sp->confid[IDX_CHAP]) { 3899 if (debug) 3900 log(LOG_DEBUG, 3901 SPP_FMT "chap dropping response for old ID " 3902 "(got %d, expected %d)\n", 3903 SPP_ARGS(ifp), 3904 h->ident, sp->confid[IDX_CHAP]); 3905 break; 3906 } 3907 if (sp->hisauth.name != NULL && 3908 (name_len != strlen(sp->hisauth.name) 3909 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 3910 log(LOG_INFO, SPP_FMT "chap response, his name ", 3911 SPP_ARGS(ifp)); 3912 sppp_print_string(name, name_len); 3913 addlog(" != expected "); 3914 sppp_print_string(sp->hisauth.name, 3915 strlen(sp->hisauth.name)); 3916 addlog("\n"); 3917 goto chap_failure; 3918 } 3919 if (debug) { 3920 log(LOG_DEBUG, SPP_FMT "chap input(%s) " 3921 "<%s id=0x%x len=%d name=", 3922 SPP_ARGS(ifp), 3923 sppp_state_name(sp->state[IDX_CHAP]), 3924 sppp_auth_type_name(PPP_CHAP, h->type), 3925 h->ident, ntohs (h->len)); 3926 sppp_print_string((char*)name, name_len); 3927 addlog(" value-size=%d value=", value_len); 3928 sppp_print_bytes(value, value_len); 3929 addlog(">\n"); 3930 } 3931 if (value_len != sizeof(sp->myauth.challenge)) { 3932 if (debug) 3933 log(LOG_DEBUG, 3934 SPP_FMT "chap bad hash value length: " 3935 "%d bytes, should be %ld\n", 3936 SPP_ARGS(ifp), value_len, 3937 (long) sizeof(sp->myauth.challenge)); 3938 goto chap_failure; 3939 } 3940 3941 MD5Init(&ctx); 3942 MD5Update(&ctx, &h->ident, 1); 3943 MD5Update(&ctx, sp->hisauth.secret, 3944 strlen(sp->hisauth.secret)); 3945 MD5Update(&ctx, sp->myauth.challenge, sizeof(sp->myauth.challenge)); 3946 MD5Final(digest, &ctx); 3947 3948 #define FAILMSG "Failed..." 3949 #define SUCCMSG "Welcome!" 3950 3951 if (value_len != sizeof digest || 3952 memcmp(digest, value, value_len) != 0) { 3953 chap_failure: 3954 /* action scn, tld */ 3955 x = splnet(); 3956 sp->pp_auth_failures++; 3957 splx(x); 3958 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 3959 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 3960 0); 3961 chap.tld(sp); 3962 break; 3963 } 3964 sp->pp_auth_failures = 0; 3965 /* action sca, perhaps tlu */ 3966 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 3967 sp->state[IDX_CHAP] == STATE_OPENED) 3968 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 3969 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 3970 0); 3971 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 3972 sppp_cp_change_state(&chap, sp, STATE_OPENED); 3973 chap.tlu(sp); 3974 } 3975 break; 3976 3977 default: 3978 /* Unknown CHAP packet type -- ignore. */ 3979 if (debug) { 3980 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) " 3981 "<0x%x id=0x%xh len=%d", 3982 SPP_ARGS(ifp), 3983 sppp_state_name(sp->state[IDX_CHAP]), 3984 h->type, h->ident, ntohs(h->len)); 3985 if (len > 4) 3986 sppp_print_bytes((u_char*)(h+1), len-4); 3987 addlog(">\n"); 3988 } 3989 break; 3990 3991 } 3992 } 3993 3994 static void 3995 sppp_chap_init(struct sppp *sp) 3996 { 3997 /* Chap doesn't have STATE_INITIAL at all. */ 3998 sp->state[IDX_CHAP] = STATE_CLOSED; 3999 sp->fail_counter[IDX_CHAP] = 0; 4000 sp->pp_seq[IDX_CHAP] = 0; 4001 sp->pp_rseq[IDX_CHAP] = 0; 4002 callout_init(&sp->ch[IDX_CHAP]); 4003 } 4004 4005 static void 4006 sppp_chap_open(struct sppp *sp) 4007 { 4008 if (sp->myauth.proto == PPP_CHAP && 4009 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4010 /* we are authenticator for CHAP, start it */ 4011 chap.scr(sp); 4012 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4013 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4014 } 4015 /* nothing to be done if we are peer, await a challenge */ 4016 } 4017 4018 static void 4019 sppp_chap_close(struct sppp *sp) 4020 { 4021 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4022 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4023 } 4024 4025 static void 4026 sppp_chap_TO(void *cookie) 4027 { 4028 struct sppp *sp = (struct sppp *)cookie; 4029 STDDCL; 4030 int s; 4031 4032 s = splnet(); 4033 if (debug) 4034 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n", 4035 SPP_ARGS(ifp), 4036 sppp_state_name(sp->state[IDX_CHAP]), 4037 sp->rst_counter[IDX_CHAP]); 4038 4039 if (--sp->rst_counter[IDX_CHAP] < 0) 4040 /* TO- event */ 4041 switch (sp->state[IDX_CHAP]) { 4042 case STATE_REQ_SENT: 4043 chap.tld(sp); 4044 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4045 break; 4046 } 4047 else 4048 /* TO+ (or TO*) event */ 4049 switch (sp->state[IDX_CHAP]) { 4050 case STATE_OPENED: 4051 /* TO* event */ 4052 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4053 /* fall through */ 4054 case STATE_REQ_SENT: 4055 chap.scr(sp); 4056 /* sppp_cp_change_state() will restart the timer */ 4057 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4058 break; 4059 } 4060 4061 splx(s); 4062 } 4063 4064 static void 4065 sppp_chap_tlu(struct sppp *sp) 4066 { 4067 STDDCL; 4068 int i, x; 4069 4070 i = 0; 4071 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4072 4073 /* 4074 * Some broken CHAP implementations (Conware CoNet, firmware 4075 * 4.0.?) don't want to re-authenticate their CHAP once the 4076 * initial challenge-response exchange has taken place. 4077 * Provide for an option to avoid rechallenges. 4078 */ 4079 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4080 /* 4081 * Compute the re-challenge timeout. This will yield 4082 * a number between 300 and 810 seconds. 4083 */ 4084 i = 300 + ((unsigned)(random() & 0xff00) >> 7); 4085 4086 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4087 } 4088 4089 if (debug) { 4090 log(LOG_DEBUG, 4091 SPP_FMT "chap %s, ", 4092 SPP_ARGS(ifp), 4093 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4094 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4095 addlog("next re-challenge in %d seconds\n", i); 4096 else 4097 addlog("re-challenging supressed\n"); 4098 } 4099 4100 x = splnet(); 4101 sp->pp_auth_failures = 0; 4102 /* indicate to LCP that we need to be closed down */ 4103 sp->lcp.protos |= (1 << IDX_CHAP); 4104 4105 if (sp->pp_flags & PP_NEEDAUTH) { 4106 /* 4107 * Remote is authenticator, but his auth proto didn't 4108 * complete yet. Defer the transition to network 4109 * phase. 4110 */ 4111 splx(x); 4112 return; 4113 } 4114 splx(x); 4115 4116 /* 4117 * If we are already in phase network, we are done here. This 4118 * is the case if this is a dummy tlu event after a re-challenge. 4119 */ 4120 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4121 sppp_phase_network(sp); 4122 } 4123 4124 static void 4125 sppp_chap_tld(struct sppp *sp) 4126 { 4127 STDDCL; 4128 4129 if (debug) 4130 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp)); 4131 callout_stop(&sp->ch[IDX_CHAP]); 4132 sp->lcp.protos &= ~(1 << IDX_CHAP); 4133 4134 lcp.Close(sp); 4135 } 4136 4137 static void 4138 sppp_chap_scr(struct sppp *sp) 4139 { 4140 struct timeval tv; 4141 u_int32_t *ch, seed; 4142 u_char clen; 4143 4144 if (sp->myauth.name == NULL) { 4145 /* can't do anything usefull */ 4146 printf(SPP_FMT "chap starting without my name being set\n", 4147 SPP_ARGS(&sp->pp_if)); 4148 return; 4149 } 4150 4151 /* Compute random challenge. */ 4152 ch = (u_int32_t *)sp->myauth.challenge; 4153 microtime(&tv); 4154 seed = tv.tv_sec ^ tv.tv_usec; 4155 ch[0] = seed ^ random(); 4156 ch[1] = seed ^ random(); 4157 ch[2] = seed ^ random(); 4158 ch[3] = seed ^ random(); 4159 clen = 16; /* 4 * sizeof(u_int32_t) */ 4160 4161 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4162 4163 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4164 sizeof clen, (const char *)&clen, 4165 sizeof(sp->myauth.challenge), sp->myauth.challenge, 4166 strlen(sp->myauth.name), 4167 sp->myauth.name, 4168 0); 4169 } 4170 4171 /* 4172 *--------------------------------------------------------------------------* 4173 * * 4174 * The PAP implementation. * 4175 * * 4176 *--------------------------------------------------------------------------* 4177 */ 4178 /* 4179 * For PAP, we need to keep a little state also if we are the peer, not the 4180 * authenticator. This is since we don't get a request to authenticate, but 4181 * have to repeatedly authenticate ourself until we got a response (or the 4182 * retry counter is expired). 4183 */ 4184 4185 /* 4186 * Handle incoming PAP packets. */ 4187 static void 4188 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4189 { 4190 STDDCL; 4191 struct lcp_header *h; 4192 int len, x; 4193 u_char mlen; 4194 char *name, *passwd; 4195 int name_len, passwd_len; 4196 4197 len = m->m_pkthdr.len; 4198 if (len < 5) { 4199 if (debug) 4200 log(LOG_DEBUG, 4201 SPP_FMT "pap invalid packet length: %d bytes\n", 4202 SPP_ARGS(ifp), len); 4203 return; 4204 } 4205 h = mtod (m, struct lcp_header*); 4206 if (len > ntohs (h->len)) 4207 len = ntohs (h->len); 4208 switch (h->type) { 4209 /* PAP request is my authproto */ 4210 case PAP_REQ: 4211 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4212 /* can't do anything usefull */ 4213 printf(SPP_FMT "pap request without his name and his secret being set\n", 4214 SPP_ARGS(ifp)); 4215 break; 4216 } 4217 name = 1 + (u_char*)(h+1); 4218 name_len = name[-1]; 4219 passwd = name + name_len + 1; 4220 if (name_len > len - 6 || 4221 (passwd_len = passwd[-1]) > len - 6 - name_len) { 4222 if (debug) { 4223 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4224 "<%s id=0x%x len=%d", 4225 SPP_ARGS(ifp), 4226 sppp_auth_type_name(PPP_PAP, h->type), 4227 h->ident, ntohs(h->len)); 4228 if (len > 4) 4229 sppp_print_bytes((u_char*)(h+1), len-4); 4230 addlog(">\n"); 4231 } 4232 break; 4233 } 4234 if (debug) { 4235 log(LOG_DEBUG, SPP_FMT "pap input(%s) " 4236 "<%s id=0x%x len=%d name=", 4237 SPP_ARGS(ifp), 4238 sppp_state_name(sp->state[IDX_PAP]), 4239 sppp_auth_type_name(PPP_PAP, h->type), 4240 h->ident, ntohs(h->len)); 4241 sppp_print_string((char*)name, name_len); 4242 addlog(" passwd="); 4243 sppp_print_string((char*)passwd, passwd_len); 4244 addlog(">\n"); 4245 } 4246 if (memcmp(name, sp->hisauth.name, name_len) != 0 || 4247 memcmp(passwd, sp->hisauth.secret, passwd_len) != 0) { 4248 /* action scn, tld */ 4249 sp->pp_auth_failures++; 4250 mlen = sizeof(FAILMSG) - 1; 4251 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4252 sizeof mlen, (const char *)&mlen, 4253 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 4254 0); 4255 pap.tld(sp); 4256 break; 4257 } 4258 /* action sca, perhaps tlu */ 4259 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4260 sp->state[IDX_PAP] == STATE_OPENED) { 4261 mlen = sizeof(SUCCMSG) - 1; 4262 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4263 sizeof mlen, (const char *)&mlen, 4264 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 4265 0); 4266 } 4267 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4268 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4269 pap.tlu(sp); 4270 } 4271 break; 4272 4273 /* ack and nak are his authproto */ 4274 case PAP_ACK: 4275 callout_stop(&sp->pap_my_to_ch); 4276 if (debug) { 4277 log(LOG_DEBUG, SPP_FMT "pap success", 4278 SPP_ARGS(ifp)); 4279 name_len = *(char *)h; 4280 if (len > 5 && name_len) { 4281 addlog(": "); 4282 sppp_print_string((char*)(h+1), name_len); 4283 } 4284 addlog("\n"); 4285 } 4286 x = splnet(); 4287 sp->pp_auth_failures = 0; 4288 sp->pp_flags &= ~PP_NEEDAUTH; 4289 if (sp->myauth.proto == PPP_PAP && 4290 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4291 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4292 /* 4293 * We are authenticator for PAP but didn't 4294 * complete yet. Leave it to tlu to proceed 4295 * to network phase. 4296 */ 4297 splx(x); 4298 break; 4299 } 4300 splx(x); 4301 sppp_phase_network(sp); 4302 break; 4303 4304 case PAP_NAK: 4305 callout_stop(&sp->pap_my_to_ch); 4306 sp->pp_auth_failures++; 4307 if (debug) { 4308 log(LOG_INFO, SPP_FMT "pap failure", 4309 SPP_ARGS(ifp)); 4310 name_len = *(char *)h; 4311 if (len > 5 && name_len) { 4312 addlog(": "); 4313 sppp_print_string((char*)(h+1), name_len); 4314 } 4315 addlog("\n"); 4316 } else 4317 log(LOG_INFO, SPP_FMT "pap failure\n", 4318 SPP_ARGS(ifp)); 4319 /* await LCP shutdown by authenticator */ 4320 break; 4321 4322 default: 4323 /* Unknown PAP packet type -- ignore. */ 4324 if (debug) { 4325 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4326 "<0x%x id=0x%x len=%d", 4327 SPP_ARGS(ifp), 4328 h->type, h->ident, ntohs(h->len)); 4329 if (len > 4) 4330 sppp_print_bytes((u_char*)(h+1), len-4); 4331 addlog(">\n"); 4332 } 4333 break; 4334 4335 } 4336 } 4337 4338 static void 4339 sppp_pap_init(struct sppp *sp) 4340 { 4341 /* PAP doesn't have STATE_INITIAL at all. */ 4342 sp->state[IDX_PAP] = STATE_CLOSED; 4343 sp->fail_counter[IDX_PAP] = 0; 4344 sp->pp_seq[IDX_PAP] = 0; 4345 sp->pp_rseq[IDX_PAP] = 0; 4346 callout_init(&sp->ch[IDX_PAP]); 4347 callout_init(&sp->pap_my_to_ch); 4348 } 4349 4350 static void 4351 sppp_pap_open(struct sppp *sp) 4352 { 4353 if (sp->hisauth.proto == PPP_PAP && 4354 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4355 /* we are authenticator for PAP, start our timer */ 4356 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4357 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4358 } 4359 if (sp->myauth.proto == PPP_PAP) { 4360 /* we are peer, send a request, and start a timer */ 4361 pap.scr(sp); 4362 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4363 sppp_pap_my_TO, sp); 4364 } 4365 } 4366 4367 static void 4368 sppp_pap_close(struct sppp *sp) 4369 { 4370 if (sp->state[IDX_PAP] != STATE_CLOSED) 4371 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4372 } 4373 4374 /* 4375 * That's the timeout routine if we are authenticator. Since the 4376 * authenticator is basically passive in PAP, we can't do much here. 4377 */ 4378 static void 4379 sppp_pap_TO(void *cookie) 4380 { 4381 struct sppp *sp = (struct sppp *)cookie; 4382 STDDCL; 4383 int s; 4384 4385 s = splnet(); 4386 if (debug) 4387 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n", 4388 SPP_ARGS(ifp), 4389 sppp_state_name(sp->state[IDX_PAP]), 4390 sp->rst_counter[IDX_PAP]); 4391 4392 if (--sp->rst_counter[IDX_PAP] < 0) 4393 /* TO- event */ 4394 switch (sp->state[IDX_PAP]) { 4395 case STATE_REQ_SENT: 4396 pap.tld(sp); 4397 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4398 break; 4399 } 4400 else 4401 /* TO+ event, not very much we could do */ 4402 switch (sp->state[IDX_PAP]) { 4403 case STATE_REQ_SENT: 4404 /* sppp_cp_change_state() will restart the timer */ 4405 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4406 break; 4407 } 4408 4409 splx(s); 4410 } 4411 4412 /* 4413 * That's the timeout handler if we are peer. Since the peer is active, 4414 * we need to retransmit our PAP request since it is apparently lost. 4415 * XXX We should impose a max counter. 4416 */ 4417 static void 4418 sppp_pap_my_TO(void *cookie) 4419 { 4420 struct sppp *sp = (struct sppp *)cookie; 4421 STDDCL; 4422 4423 if (debug) 4424 log(LOG_DEBUG, SPP_FMT "pap peer TO\n", 4425 SPP_ARGS(ifp)); 4426 4427 pap.scr(sp); 4428 } 4429 4430 static void 4431 sppp_pap_tlu(struct sppp *sp) 4432 { 4433 STDDCL; 4434 int x; 4435 4436 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4437 4438 if (debug) 4439 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 4440 SPP_ARGS(ifp), pap.name); 4441 4442 x = splnet(); 4443 sp->pp_auth_failures = 0; 4444 /* indicate to LCP that we need to be closed down */ 4445 sp->lcp.protos |= (1 << IDX_PAP); 4446 4447 if (sp->pp_flags & PP_NEEDAUTH) { 4448 /* 4449 * Remote is authenticator, but his auth proto didn't 4450 * complete yet. Defer the transition to network 4451 * phase. 4452 */ 4453 splx(x); 4454 return; 4455 } 4456 splx(x); 4457 sppp_phase_network(sp); 4458 } 4459 4460 static void 4461 sppp_pap_tld(struct sppp *sp) 4462 { 4463 STDDCL; 4464 4465 if (debug) 4466 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp)); 4467 callout_stop(&sp->ch[IDX_PAP]); 4468 callout_stop(&sp->pap_my_to_ch); 4469 sp->lcp.protos &= ~(1 << IDX_PAP); 4470 4471 lcp.Close(sp); 4472 } 4473 4474 static void 4475 sppp_pap_scr(struct sppp *sp) 4476 { 4477 u_char idlen, pwdlen; 4478 4479 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4480 /* can't do anything usefull */ 4481 printf(SPP_FMT "pap starting without my name and secret being set\n", 4482 SPP_ARGS(&sp->pp_if)); 4483 return; 4484 } 4485 4486 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4487 pwdlen = strlen(sp->myauth.secret); 4488 idlen = strlen(sp->myauth.name); 4489 4490 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4491 sizeof idlen, (const char *)&idlen, 4492 idlen, sp->myauth.name, 4493 sizeof pwdlen, (const char *)&pwdlen, 4494 pwdlen, sp->myauth.secret, 4495 0); 4496 } 4497 4498 /* 4499 * Random miscellaneous functions. 4500 */ 4501 4502 /* 4503 * Send a PAP or CHAP proto packet. 4504 * 4505 * Varadic function, each of the elements for the ellipsis is of type 4506 * ``size_t mlen, const u_char *msg''. Processing will stop iff 4507 * mlen == 0. 4508 * NOTE: never declare variadic functions with types subject to type 4509 * promotion (i.e. u_char). This is asking for big trouble depending 4510 * on the architecture you are on... 4511 */ 4512 4513 static void 4514 sppp_auth_send(const struct cp *cp, struct sppp *sp, 4515 unsigned int type, unsigned int id, 4516 ...) 4517 { 4518 STDDCL; 4519 struct lcp_header *lh; 4520 struct mbuf *m; 4521 u_char *p; 4522 int len; 4523 size_t pkthdrlen; 4524 unsigned int mlen; 4525 const char *msg; 4526 va_list ap; 4527 4528 MGETHDR (m, M_DONTWAIT, MT_DATA); 4529 if (! m) 4530 return; 4531 m->m_pkthdr.rcvif = 0; 4532 4533 if (sp->pp_flags & PP_NOFRAMING) { 4534 *mtod(m, u_int16_t*) = htons(cp->proto); 4535 pkthdrlen = 2; 4536 lh = (struct lcp_header*)(mtod(m, u_int8_t*)+2); 4537 } else { 4538 struct ppp_header *h; 4539 h = mtod (m, struct ppp_header*); 4540 h->address = PPP_ALLSTATIONS; /* broadcast address */ 4541 h->control = PPP_UI; /* Unnumbered Info */ 4542 h->protocol = htons(cp->proto); 4543 pkthdrlen = PPP_HEADER_LEN; 4544 4545 lh = (struct lcp_header*)(h + 1); 4546 } 4547 4548 lh->type = type; 4549 lh->ident = id; 4550 p = (u_char*) (lh+1); 4551 4552 va_start(ap, id); 4553 len = 0; 4554 4555 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 4556 msg = va_arg(ap, const char *); 4557 len += mlen; 4558 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 4559 va_end(ap); 4560 m_freem(m); 4561 return; 4562 } 4563 4564 bcopy(msg, p, mlen); 4565 p += mlen; 4566 } 4567 va_end(ap); 4568 4569 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 4570 lh->len = htons (LCP_HEADER_LEN + len); 4571 4572 if (debug) { 4573 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 4574 SPP_ARGS(ifp), cp->name, 4575 sppp_auth_type_name(cp->proto, lh->type), 4576 lh->ident, ntohs(lh->len)); 4577 if (len) 4578 sppp_print_bytes((u_char*) (lh+1), len); 4579 addlog(">\n"); 4580 } 4581 if (IF_QFULL (&sp->pp_cpq)) { 4582 IF_DROP (&sp->pp_fastq); 4583 IF_DROP (&ifp->if_snd); 4584 m_freem (m); 4585 ++ifp->if_oerrors; 4586 } else 4587 IF_ENQUEUE (&sp->pp_cpq, m); 4588 if (! (ifp->if_flags & IFF_OACTIVE)) 4589 (*ifp->if_start) (ifp); 4590 ifp->if_obytes += m->m_pkthdr.len + 3; 4591 } 4592 4593 /* 4594 * Send keepalive packets, every 10 seconds. 4595 */ 4596 static void 4597 sppp_keepalive(void *dummy) 4598 { 4599 struct sppp *sp; 4600 int s; 4601 time_t now; 4602 4603 s = splnet(); 4604 now = time.tv_sec; 4605 for (sp=spppq; sp; sp=sp->pp_next) { 4606 struct ifnet *ifp = &sp->pp_if; 4607 4608 /* check idle timeout */ 4609 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 4610 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 4611 /* idle timeout is enabled for this interface */ 4612 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 4613 if (ifp->if_flags & IFF_DEBUG) 4614 printf("%s: no activitiy for %lu seconds\n", 4615 sp->pp_if.if_xname, 4616 (unsigned long)(now-sp->pp_last_activity)); 4617 lcp.Close(sp); 4618 continue; 4619 } 4620 } 4621 4622 /* Keepalive mode disabled or channel down? */ 4623 if (! (sp->pp_flags & PP_KEEPALIVE) || 4624 ! (ifp->if_flags & IFF_RUNNING)) 4625 continue; 4626 4627 /* No keepalive in PPP mode if LCP not opened yet. */ 4628 if (! (sp->pp_flags & PP_CISCO) && 4629 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) 4630 continue; 4631 4632 if (sp->pp_alivecnt == MAXALIVECNT) { 4633 /* No keepalive packets got. Stop the interface. */ 4634 if_down (ifp); 4635 IF_PURGE (&sp->pp_cpq); 4636 if (! (sp->pp_flags & PP_CISCO)) { 4637 printf("%s: LCP keepalive timed out, going to restart the connection\n", 4638 ifp->if_xname); 4639 sp->pp_alivecnt = 0; 4640 4641 /* we are down, close all open protocols */ 4642 lcp.Close(sp); 4643 4644 /* And now prepare LCP to reestablish the link, if configured to do so. */ 4645 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 4646 4647 /* Close connection imediatly, completition of this 4648 * will summon the magic needed to reestablish it. */ 4649 sp->pp_tlf(sp); 4650 continue; 4651 } 4652 } 4653 if (sp->pp_alivecnt <= MAXALIVECNT) 4654 ++sp->pp_alivecnt; 4655 if (sp->pp_flags & PP_CISCO) 4656 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ, 4657 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 4658 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 4659 int32_t nmagic = htonl (sp->lcp.magic); 4660 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 4661 sppp_cp_send (sp, PPP_LCP, ECHO_REQ, 4662 sp->lcp.echoid, 4, &nmagic); 4663 } 4664 } 4665 splx(s); 4666 callout_reset(&keepalive_ch, hz * 10, sppp_keepalive, NULL); 4667 } 4668 4669 /* 4670 * Get both IP addresses. 4671 */ 4672 static void 4673 sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, u_int32_t *srcmask) 4674 { 4675 struct ifnet *ifp = &sp->pp_if; 4676 struct ifaddr *ifa; 4677 struct sockaddr_in *si, *sm; 4678 u_int32_t ssrc, ddst; 4679 4680 sm = NULL; 4681 ssrc = ddst = 0; 4682 /* 4683 * Pick the first AF_INET address from the list, 4684 * aliases don't make any sense on a p2p link anyway. 4685 */ 4686 si = 0; 4687 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 4688 if (ifa->ifa_addr->sa_family == AF_INET) { 4689 si = (struct sockaddr_in *)ifa->ifa_addr; 4690 sm = (struct sockaddr_in *)ifa->ifa_netmask; 4691 if (si) 4692 break; 4693 } 4694 } 4695 if (ifa) { 4696 if (si && si->sin_addr.s_addr) { 4697 ssrc = si->sin_addr.s_addr; 4698 if (srcmask) 4699 *srcmask = ntohl(sm->sin_addr.s_addr); 4700 } 4701 4702 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 4703 if (si && si->sin_addr.s_addr) 4704 ddst = si->sin_addr.s_addr; 4705 } 4706 4707 if (dst) *dst = ntohl(ddst); 4708 if (src) *src = ntohl(ssrc); 4709 } 4710 4711 /* 4712 * Set IP addresses. Must be called at splnet. 4713 * If an address is 0, leave it the way it is. 4714 */ 4715 static void 4716 sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr) 4717 { 4718 STDDCL; 4719 struct ifaddr *ifa; 4720 struct sockaddr_in *si; 4721 struct sockaddr_in *dest; 4722 4723 /* 4724 * Pick the first AF_INET address from the list, 4725 * aliases don't make any sense on a p2p link anyway. 4726 */ 4727 4728 si = 0; 4729 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4730 { 4731 if (ifa->ifa_addr->sa_family == AF_INET) 4732 { 4733 si = (struct sockaddr_in *)ifa->ifa_addr; 4734 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4735 if (si) 4736 break; 4737 } 4738 } 4739 4740 if (ifa && si) 4741 { 4742 int error; 4743 struct sockaddr_in new_sin = *si; 4744 struct sockaddr_in new_dst = *dest; 4745 4746 /* 4747 * Scrub old routes now instead of calling in_ifinit with 4748 * scrub=1, because we may change the dstaddr 4749 * before the call to in_ifinit. 4750 */ 4751 in_ifscrub(ifp, ifatoia(ifa)); 4752 4753 if (myaddr != 0) 4754 new_sin.sin_addr.s_addr = htonl(myaddr); 4755 if (hisaddr != 0) { 4756 new_dst.sin_addr.s_addr = htonl(hisaddr); 4757 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) { 4758 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 4759 *dest = new_dst; /* fix dstaddr in place */ 4760 } 4761 } 4762 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4763 if(debug && error) 4764 { 4765 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addrs: in_ifinit " 4766 " failed, error=%d\n", SPP_ARGS(ifp), error); 4767 } 4768 } 4769 } 4770 4771 /* 4772 * Clear IP addresses. Must be called at splnet. 4773 */ 4774 static void 4775 sppp_clear_ip_addrs(struct sppp *sp) 4776 { 4777 struct ifnet *ifp = &sp->pp_if; 4778 struct ifaddr *ifa; 4779 struct sockaddr_in *si; 4780 struct sockaddr_in *dest; 4781 4782 u_int32_t remote; 4783 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4784 remote = sp->ipcp.saved_hisaddr; 4785 else 4786 sppp_get_ip_addrs(sp, 0, &remote, 0); 4787 4788 /* 4789 * Pick the first AF_INET address from the list, 4790 * aliases don't make any sense on a p2p link anyway. 4791 */ 4792 4793 si = 0; 4794 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4795 { 4796 if (ifa->ifa_addr->sa_family == AF_INET) 4797 { 4798 si = (struct sockaddr_in *)ifa->ifa_addr; 4799 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4800 if (si) 4801 break; 4802 } 4803 } 4804 4805 if (ifa && si) 4806 { 4807 struct sockaddr_in new_sin = *si; 4808 4809 in_ifscrub(ifp, ifatoia(ifa)); 4810 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 4811 new_sin.sin_addr.s_addr = 0; 4812 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4813 /* replace peer addr in place */ 4814 dest->sin_addr.s_addr = sp->ipcp.saved_hisaddr; 4815 in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4816 } 4817 } 4818 4819 #ifdef INET6 4820 /* 4821 * Get both IPv6 addresses. 4822 */ 4823 static void 4824 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 4825 struct in6_addr *srcmask) 4826 { 4827 struct ifnet *ifp = &sp->pp_if; 4828 struct ifaddr *ifa; 4829 struct sockaddr_in6 *si, *sm; 4830 struct in6_addr ssrc, ddst; 4831 4832 sm = NULL; 4833 memset(&ssrc, 0, sizeof(ssrc)); 4834 memset(&ddst, 0, sizeof(ddst)); 4835 /* 4836 * Pick the first link-local AF_INET6 address from the list, 4837 * aliases don't make any sense on a p2p link anyway. 4838 */ 4839 si = 0; 4840 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4841 if (ifa->ifa_addr->sa_family == AF_INET6) { 4842 si = (struct sockaddr_in6 *)ifa->ifa_addr; 4843 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 4844 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 4845 break; 4846 } 4847 if (ifa) { 4848 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 4849 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc)); 4850 if (srcmask) { 4851 bcopy(&sm->sin6_addr, srcmask, 4852 sizeof(*srcmask)); 4853 } 4854 } 4855 4856 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 4857 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 4858 bcopy(&si->sin6_addr, &ddst, sizeof(ddst)); 4859 } 4860 4861 if (dst) 4862 bcopy(&ddst, dst, sizeof(*dst)); 4863 if (src) 4864 bcopy(&ssrc, src, sizeof(*src)); 4865 } 4866 4867 #ifdef IPV6CP_MYIFID_DYN 4868 /* 4869 * Generate random ifid. 4870 */ 4871 static void 4872 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 4873 { 4874 /* TBD */ 4875 } 4876 4877 /* 4878 * Set my IPv6 address. Must be called at splnet. 4879 */ 4880 static void 4881 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 4882 { 4883 STDDCL; 4884 struct ifaddr *ifa; 4885 struct sockaddr_in6 *sin6; 4886 4887 /* 4888 * Pick the first link-local AF_INET6 address from the list, 4889 * aliases don't make any sense on a p2p link anyway. 4890 */ 4891 4892 sin6 = NULL; 4893 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4894 { 4895 if (ifa->ifa_addr->sa_family == AF_INET6) 4896 { 4897 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 4898 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 4899 break; 4900 } 4901 } 4902 4903 if (ifa && sin6) 4904 { 4905 int error; 4906 struct sockaddr_in6 new_sin6 = *sin6; 4907 4908 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr)); 4909 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 4910 if (debug && error) 4911 { 4912 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit " 4913 " failed, error=%d\n", SPP_ARGS(ifp), error); 4914 } 4915 } 4916 } 4917 #endif 4918 4919 /* 4920 * Suggest a candidate address to be used by peer. 4921 */ 4922 static void 4923 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 4924 { 4925 struct in6_addr myaddr; 4926 struct timeval tv; 4927 4928 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4929 4930 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 4931 microtime(&tv); 4932 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 4933 myaddr.s6_addr[14] ^= 0xff; 4934 myaddr.s6_addr[15] ^= 0xff; 4935 } else { 4936 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 4937 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 4938 } 4939 if (suggest) 4940 bcopy(&myaddr, suggest, sizeof(myaddr)); 4941 } 4942 #endif /*INET6*/ 4943 4944 /* 4945 * Process ioctl requests specific to the PPP interface. 4946 * Permissions have already been checked. 4947 */ 4948 static int 4949 sppp_params(struct sppp *sp, int cmd, void *data) 4950 { 4951 switch (cmd) { 4952 case SPPPGETAUTHCFG: 4953 { 4954 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 4955 int error; 4956 size_t len; 4957 4958 cfg->myauthflags = sp->myauth.flags; 4959 cfg->hisauthflags = sp->hisauth.flags; 4960 strncpy(cfg->ifname, sp->pp_if.if_xname, IFNAMSIZ); 4961 cfg->hisauth = 0; 4962 if (sp->hisauth.proto) 4963 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4964 cfg->myauth = 0; 4965 if (sp->myauth.proto) 4966 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4967 if (cfg->myname_length == 0) { 4968 if (sp->myauth.name != NULL) 4969 cfg->myname_length = strlen(sp->myauth.name)+1; 4970 } else { 4971 if (sp->myauth.name == NULL) { 4972 cfg->myname_length = 0; 4973 } else { 4974 len = strlen(sp->myauth.name)+1; 4975 if (cfg->myname_length < len) 4976 return (ENAMETOOLONG); 4977 error = copyout(sp->myauth.name, cfg->myname, len); 4978 if (error) return error; 4979 } 4980 } 4981 if (cfg->hisname_length == 0) { 4982 if(sp->hisauth.name != NULL) 4983 cfg->hisname_length = strlen(sp->hisauth.name)+1; 4984 } else { 4985 if (sp->hisauth.name == NULL) { 4986 cfg->hisname_length = 0; 4987 } else { 4988 len = strlen(sp->hisauth.name)+1; 4989 if (cfg->hisname_length < len) 4990 return (ENAMETOOLONG); 4991 error = copyout(sp->hisauth.name, cfg->hisname, len); 4992 if (error) return error; 4993 } 4994 } 4995 } 4996 break; 4997 case SPPPSETAUTHCFG: 4998 { 4999 struct spppauthcfg *cfg = (struct spppauthcfg*)data; 5000 int error; 5001 5002 if (sp->myauth.name) { 5003 free(sp->myauth.name, M_DEVBUF); 5004 sp->myauth.name = NULL; 5005 } 5006 if (sp->myauth.secret) { 5007 free(sp->myauth.secret, M_DEVBUF); 5008 sp->myauth.secret = NULL; 5009 } 5010 if (sp->hisauth.name) { 5011 free(sp->hisauth.name, M_DEVBUF); 5012 sp->hisauth.name = NULL; 5013 } 5014 if (sp->hisauth.secret) { 5015 free(sp->hisauth.secret, M_DEVBUF); 5016 sp->hisauth.secret = NULL; 5017 } 5018 5019 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5020 if (cfg->hisname_length >= MCLBYTES) 5021 return (ENAMETOOLONG); 5022 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5023 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5024 if (error) { 5025 free(sp->hisauth.name, M_DEVBUF); 5026 sp->hisauth.name = NULL; 5027 return error; 5028 } 5029 sp->hisauth.name[cfg->hisname_length-1] = 0; 5030 } 5031 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5032 if (cfg->hissecret_length >= MCLBYTES) 5033 return (ENAMETOOLONG); 5034 sp->hisauth.secret = malloc(cfg->hissecret_length, M_DEVBUF, M_WAITOK); 5035 error = copyin(cfg->hissecret, sp->hisauth.secret, cfg->hissecret_length); 5036 if (error) { 5037 free(sp->hisauth.secret, M_DEVBUF); 5038 sp->hisauth.secret = NULL; 5039 return error; 5040 } 5041 sp->hisauth.secret[cfg->hissecret_length-1] = 0; 5042 } 5043 if (cfg->myname != NULL && cfg->myname_length > 0) { 5044 if (cfg->myname_length >= MCLBYTES) 5045 return (ENAMETOOLONG); 5046 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5047 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5048 if (error) { 5049 free(sp->myauth.name, M_DEVBUF); 5050 sp->myauth.name = NULL; 5051 return error; 5052 } 5053 sp->myauth.name[cfg->myname_length-1] = 0; 5054 } 5055 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5056 if (cfg->mysecret_length >= MCLBYTES) 5057 return (ENAMETOOLONG); 5058 sp->myauth.secret = malloc(cfg->mysecret_length, M_DEVBUF, M_WAITOK); 5059 error = copyin(cfg->mysecret, sp->myauth.secret, cfg->mysecret_length); 5060 if (error) { 5061 free(sp->myauth.secret, M_DEVBUF); 5062 sp->myauth.secret = NULL; 5063 return error; 5064 } 5065 sp->myauth.secret[cfg->mysecret_length-1] = 0; 5066 } 5067 sp->myauth.flags = cfg->myauthflags; 5068 if (cfg->myauth) 5069 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5070 sp->hisauth.flags = cfg->hisauthflags; 5071 if (cfg->hisauth) 5072 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5073 sp->pp_auth_failures = 0; 5074 } 5075 break; 5076 case SPPPGETLCPCFG: 5077 { 5078 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5079 lcp->lcp_timeout = sp->lcp.timeout; 5080 } 5081 break; 5082 case SPPPSETLCPCFG: 5083 { 5084 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5085 sp->lcp.timeout = lcp->lcp_timeout; 5086 } 5087 break; 5088 case SPPPGETSTATUS: 5089 { 5090 struct spppstatus *status = (struct spppstatus *)data; 5091 status->phase = sp->pp_phase; 5092 } 5093 break; 5094 case SPPPGETIDLETO: 5095 { 5096 struct spppidletimeout *to = (struct spppidletimeout *)data; 5097 to->idle_seconds = sp->pp_idle_timeout; 5098 } 5099 break; 5100 case SPPPSETIDLETO: 5101 { 5102 struct spppidletimeout *to = (struct spppidletimeout *)data; 5103 sp->pp_idle_timeout = to->idle_seconds; 5104 } 5105 break; 5106 case SPPPSETAUTHFAILURE: 5107 { 5108 struct spppauthfailuresettings *afsettings = (struct spppauthfailuresettings *)data; 5109 sp->pp_max_auth_fail = afsettings->max_failures; 5110 sp->pp_auth_failures = 0; 5111 } 5112 break; 5113 case SPPPGETAUTHFAILURES: 5114 { 5115 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5116 stats->auth_failures = sp->pp_auth_failures; 5117 stats->max_failures = sp->pp_max_auth_fail; 5118 } 5119 break; 5120 case SPPPSETDNSOPTS: 5121 { 5122 struct spppdnssettings *req = (struct spppdnssettings*)data; 5123 sp->query_dns = req->query_dns & 3; 5124 } 5125 break; 5126 case SPPPGETDNSOPTS: 5127 { 5128 struct spppdnssettings *req = (struct spppdnssettings*)data; 5129 req->query_dns = sp->query_dns; 5130 } 5131 break; 5132 case SPPPGETDNSADDRS: 5133 { 5134 struct spppdnsaddrs *addrs = (struct spppdnsaddrs*)data; 5135 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5136 } 5137 break; 5138 default: 5139 return (EINVAL); 5140 } 5141 5142 return (0); 5143 } 5144 5145 static void 5146 sppp_phase_network(struct sppp *sp) 5147 { 5148 STDDCL; 5149 int i; 5150 u_int32_t mask; 5151 5152 sp->pp_phase = SPPP_PHASE_NETWORK; 5153 5154 if(debug) 5155 { 5156 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 5157 sppp_phase_name(sp->pp_phase)); 5158 } 5159 5160 /* Notify NCPs now. */ 5161 for (i = 0; i < IDX_COUNT; i++) 5162 if ((cps[i])->flags & CP_NCP) 5163 (cps[i])->Open(sp); 5164 5165 /* Send Up events to all NCPs. */ 5166 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5167 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) 5168 (cps[i])->Up(sp); 5169 5170 /* if no NCP is starting, all this was in vain, close down */ 5171 sppp_lcp_check_and_close(sp); 5172 } 5173 5174 5175 static const char * 5176 sppp_cp_type_name(u_char type) 5177 { 5178 static char buf[12]; 5179 switch (type) { 5180 case CONF_REQ: return "conf-req"; 5181 case CONF_ACK: return "conf-ack"; 5182 case CONF_NAK: return "conf-nak"; 5183 case CONF_REJ: return "conf-rej"; 5184 case TERM_REQ: return "term-req"; 5185 case TERM_ACK: return "term-ack"; 5186 case CODE_REJ: return "code-rej"; 5187 case PROTO_REJ: return "proto-rej"; 5188 case ECHO_REQ: return "echo-req"; 5189 case ECHO_REPLY: return "echo-reply"; 5190 case DISC_REQ: return "discard-req"; 5191 } 5192 sprintf (buf, "0x%x", type); 5193 return buf; 5194 } 5195 5196 static const char * 5197 sppp_auth_type_name(u_short proto, u_char type) 5198 { 5199 static char buf[12]; 5200 switch (proto) { 5201 case PPP_CHAP: 5202 switch (type) { 5203 case CHAP_CHALLENGE: return "challenge"; 5204 case CHAP_RESPONSE: return "response"; 5205 case CHAP_SUCCESS: return "success"; 5206 case CHAP_FAILURE: return "failure"; 5207 } 5208 case PPP_PAP: 5209 switch (type) { 5210 case PAP_REQ: return "req"; 5211 case PAP_ACK: return "ack"; 5212 case PAP_NAK: return "nak"; 5213 } 5214 } 5215 sprintf (buf, "0x%x", type); 5216 return buf; 5217 } 5218 5219 static const char * 5220 sppp_lcp_opt_name(u_char opt) 5221 { 5222 static char buf[12]; 5223 switch (opt) { 5224 case LCP_OPT_MRU: return "mru"; 5225 case LCP_OPT_ASYNC_MAP: return "async-map"; 5226 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 5227 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 5228 case LCP_OPT_MAGIC: return "magic"; 5229 case LCP_OPT_PROTO_COMP: return "proto-comp"; 5230 case LCP_OPT_ADDR_COMP: return "addr-comp"; 5231 } 5232 sprintf (buf, "0x%x", opt); 5233 return buf; 5234 } 5235 5236 static const char * 5237 sppp_ipcp_opt_name(u_char opt) 5238 { 5239 static char buf[12]; 5240 switch (opt) { 5241 case IPCP_OPT_ADDRESSES: return "addresses"; 5242 case IPCP_OPT_COMPRESSION: return "compression"; 5243 case IPCP_OPT_ADDRESS: return "address"; 5244 } 5245 sprintf (buf, "0x%x", opt); 5246 return buf; 5247 } 5248 5249 #ifdef INET6 5250 static const char * 5251 sppp_ipv6cp_opt_name(u_char opt) 5252 { 5253 static char buf[12]; 5254 switch (opt) { 5255 case IPV6CP_OPT_IFID: return "ifid"; 5256 case IPV6CP_OPT_COMPRESSION: return "compression"; 5257 } 5258 sprintf (buf, "0x%x", opt); 5259 return buf; 5260 } 5261 #endif 5262 5263 static const char * 5264 sppp_state_name(int state) 5265 { 5266 switch (state) { 5267 case STATE_INITIAL: return "initial"; 5268 case STATE_STARTING: return "starting"; 5269 case STATE_CLOSED: return "closed"; 5270 case STATE_STOPPED: return "stopped"; 5271 case STATE_CLOSING: return "closing"; 5272 case STATE_STOPPING: return "stopping"; 5273 case STATE_REQ_SENT: return "req-sent"; 5274 case STATE_ACK_RCVD: return "ack-rcvd"; 5275 case STATE_ACK_SENT: return "ack-sent"; 5276 case STATE_OPENED: return "opened"; 5277 } 5278 return "illegal"; 5279 } 5280 5281 static const char * 5282 sppp_phase_name(int phase) 5283 { 5284 switch (phase) { 5285 case SPPP_PHASE_DEAD: return "dead"; 5286 case SPPP_PHASE_ESTABLISH: return "establish"; 5287 case SPPP_PHASE_TERMINATE: return "terminate"; 5288 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 5289 case SPPP_PHASE_NETWORK: return "network"; 5290 } 5291 return "illegal"; 5292 } 5293 5294 static const char * 5295 sppp_proto_name(u_short proto) 5296 { 5297 static char buf[12]; 5298 switch (proto) { 5299 case PPP_LCP: return "lcp"; 5300 case PPP_IPCP: return "ipcp"; 5301 case PPP_PAP: return "pap"; 5302 case PPP_CHAP: return "chap"; 5303 case PPP_IPV6CP: return "ipv6cp"; 5304 } 5305 sprintf(buf, "0x%x", (unsigned)proto); 5306 return buf; 5307 } 5308 5309 static void 5310 sppp_print_bytes(const u_char *p, u_short len) 5311 { 5312 addlog(" %02x", *p++); 5313 while (--len > 0) 5314 addlog("-%02x", *p++); 5315 } 5316 5317 static void 5318 sppp_print_string(const char *p, u_short len) 5319 { 5320 u_char c; 5321 5322 while (len-- > 0) { 5323 c = *p++; 5324 /* 5325 * Print only ASCII chars directly. RFC 1994 recommends 5326 * using only them, but we don't rely on it. */ 5327 if (c < ' ' || c > '~') 5328 addlog("\\x%x", c); 5329 else 5330 addlog("%c", c); 5331 } 5332 } 5333 5334 static const char * 5335 sppp_dotted_quad(u_int32_t addr) 5336 { 5337 static char s[16]; 5338 sprintf(s, "%d.%d.%d.%d", 5339 (int)((addr >> 24) & 0xff), 5340 (int)((addr >> 16) & 0xff), 5341 (int)((addr >> 8) & 0xff), 5342 (int)(addr & 0xff)); 5343 return s; 5344 } 5345 5346 /* a dummy, used to drop uninteresting events */ 5347 static void 5348 sppp_null(struct sppp *unused) 5349 { 5350 /* do just nothing */ 5351 } 5352 /* 5353 * This file is large. Tell emacs to highlight it nevertheless. 5354 * 5355 * Local Variables: 5356 * hilit-auto-highlight-maxout: 120000 5357 * End: 5358 */ 5359
Indexes created Fri Sep 26 08:10:20 GMT 2025