if_spppsubr.c revision 1.46.4.5
1 /* $NetBSD: if_spppsubr.c,v 1.46.4.5 2003/01/10 06:49:47 jmc 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 1.46.4.5 2003/01/10 06:49:47 jmc 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 m_freem(m); 737 splx(s); 738 if (ip->ip_p == IPPROTO_TCP) 739 return(EADDRNOTAVAIL); 740 else 741 return(0); 742 } 743 744 /* 745 * Put low delay, telnet, rlogin and ftp control packets 746 * in front of the queue. 747 */ 748 749 if (!IF_QFULL(&sp->pp_fastq) && 750 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 751 (th && (INTERACTIVE(ntohs(th->th_sport)) || 752 INTERACTIVE(ntohs(th->th_dport)))))) 753 ifq = &sp->pp_fastq; 754 } 755 #endif 756 757 #ifdef INET6 758 if (dst->sa_family == AF_INET6) { 759 /* XXX do something tricky here? */ 760 } 761 #endif 762 763 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 764 /* 765 * Prepend general data packet PPP header. For now, IP only. 766 */ 767 M_PREPEND (m, PPP_HEADER_LEN, M_DONTWAIT); 768 if (! m) { 769 if (ifp->if_flags & IFF_DEBUG) 770 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 771 SPP_ARGS(ifp)); 772 ++ifp->if_oerrors; 773 splx (s); 774 return (ENOBUFS); 775 } 776 /* 777 * May want to check size of packet 778 * (albeit due to the implementation it's always enough) 779 */ 780 h = mtod (m, struct ppp_header*); 781 if (sp->pp_flags & PP_CISCO) { 782 h->address = CISCO_UNICAST; /* unicast address */ 783 h->control = 0; 784 } else { 785 h->address = PPP_ALLSTATIONS; /* broadcast address */ 786 h->control = PPP_UI; /* Unnumbered Info */ 787 } 788 } 789 790 switch (dst->sa_family) { 791 #ifdef INET 792 case AF_INET: /* Internet Protocol */ 793 if (sp->pp_flags & PP_CISCO) 794 protocol = htons (ETHERTYPE_IP); 795 else { 796 /* 797 * Don't choke with an ENETDOWN early. It's 798 * possible that we just started dialing out, 799 * so don't drop the packet immediately. If 800 * we notice that we run out of buffer space 801 * below, we will however remember that we are 802 * not ready to carry IP packets, and return 803 * ENETDOWN, as opposed to ENOBUFS. 804 */ 805 protocol = htons(PPP_IP); 806 if (sp->state[IDX_IPCP] != STATE_OPENED) 807 rv = ENETDOWN; 808 } 809 break; 810 #endif 811 #ifdef INET6 812 case AF_INET6: /* Internet Protocol version 6 */ 813 if (sp->pp_flags & PP_CISCO) 814 protocol = htons (ETHERTYPE_IPV6); 815 else { 816 /* 817 * Don't choke with an ENETDOWN early. It's 818 * possible that we just started dialing out, 819 * so don't drop the packet immediately. If 820 * we notice that we run out of buffer space 821 * below, we will however remember that we are 822 * not ready to carry IP packets, and return 823 * ENETDOWN, as opposed to ENOBUFS. 824 */ 825 protocol = htons(PPP_IPV6); 826 if (sp->state[IDX_IPV6CP] != STATE_OPENED) 827 rv = ENETDOWN; 828 } 829 break; 830 #endif 831 #ifdef NS 832 case AF_NS: /* Xerox NS Protocol */ 833 protocol = htons ((sp->pp_flags & PP_CISCO) ? 834 ETHERTYPE_NS : PPP_XNS); 835 break; 836 #endif 837 #ifdef IPX 838 case AF_IPX: /* Novell IPX Protocol */ 839 protocol = htons ((sp->pp_flags & PP_CISCO) ? 840 ETHERTYPE_IPX : PPP_IPX); 841 break; 842 #endif 843 #ifdef ISO 844 case AF_ISO: /* ISO OSI Protocol */ 845 if (sp->pp_flags & PP_CISCO) 846 goto nosupport; 847 protocol = htons (PPP_ISO); 848 break; 849 nosupport: 850 #endif 851 default: 852 m_freem (m); 853 ++ifp->if_oerrors; 854 splx (s); 855 return (EAFNOSUPPORT); 856 } 857 858 if (sp->pp_flags & PP_NOFRAMING) { 859 M_PREPEND (m, 2, M_DONTWAIT); 860 if (m == NULL) { 861 if (ifp->if_flags & IFF_DEBUG) 862 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 863 SPP_ARGS(ifp)); 864 ++ifp->if_oerrors; 865 splx (s); 866 return (ENOBUFS); 867 } 868 *mtod(m, u_int16_t*) = protocol; 869 } else { 870 h->protocol = protocol; 871 } 872 873 /* 874 * Queue message on interface, and start output if interface 875 * not yet active. 876 */ 877 len = m->m_pkthdr.len; 878 if (ifq != NULL 879 #ifdef ALTQ 880 && ALTQ_IS_ENABLED(&ifp->if_snd) == 0 881 #endif 882 ) { 883 if (IF_QFULL (ifq)) { 884 IF_DROP (&ifp->if_snd); 885 m_freem (m); 886 if (rv == 0) 887 rv = ENOBUFS; 888 } 889 IF_ENQUEUE(ifq, m); 890 } else 891 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, rv); 892 if (rv != 0) { 893 ++ifp->if_oerrors; 894 splx(s); 895 return (rv); 896 } 897 898 if (! (ifp->if_flags & IFF_OACTIVE)) 899 (*ifp->if_start) (ifp); 900 901 /* 902 * Count output packets and bytes. 903 * The packet length includes header + additional hardware framing 904 * according to RFC 1333. 905 */ 906 ifp->if_obytes += len + sp->pp_framebytes; 907 splx (s); 908 return (0); 909 } 910 911 void 912 sppp_attach(struct ifnet *ifp) 913 { 914 struct sppp *sp = (struct sppp*) ifp; 915 916 /* Initialize keepalive handler. */ 917 if (! spppq) { 918 callout_init(&keepalive_ch); 919 callout_reset(&keepalive_ch, hz * 10, sppp_keepalive, NULL); 920 } 921 922 /* Insert new entry into the keepalive list. */ 923 sp->pp_next = spppq; 924 spppq = sp; 925 926 sp->pp_if.if_type = IFT_PPP; 927 sp->pp_if.if_output = sppp_output; 928 sp->pp_fastq.ifq_maxlen = 32; 929 sp->pp_cpq.ifq_maxlen = 20; 930 sp->pp_loopcnt = 0; 931 sp->pp_alivecnt = 0; 932 sp->pp_last_activity = 0; 933 sp->pp_idle_timeout = 0; 934 memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq)); 935 memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq)); 936 sp->pp_auth_failures = 0; 937 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 938 sp->pp_phase = SPPP_PHASE_DEAD; 939 sp->pp_up = lcp.Up; 940 sp->pp_down = lcp.Down; 941 942 if_alloc_sadl(ifp); 943 944 memset(&sp->myauth, 0, sizeof sp->myauth); 945 memset(&sp->hisauth, 0, sizeof sp->hisauth); 946 sppp_lcp_init(sp); 947 sppp_ipcp_init(sp); 948 sppp_ipv6cp_init(sp); 949 sppp_pap_init(sp); 950 sppp_chap_init(sp); 951 } 952 953 void 954 sppp_detach(struct ifnet *ifp) 955 { 956 struct sppp **q, *p, *sp = (struct sppp*) ifp; 957 int i; 958 959 /* Remove the entry from the keepalive list. */ 960 for (q = &spppq; (p = *q); q = &p->pp_next) 961 if (p == sp) { 962 *q = p->pp_next; 963 break; 964 } 965 966 /* Stop keepalive handler. */ 967 if (! spppq) { 968 callout_stop(&keepalive_ch); 969 } 970 971 for (i = 0; i < IDX_COUNT; i++) { 972 callout_stop(&sp->ch[i]); 973 } 974 callout_stop(&sp->pap_my_to_ch); 975 976 /* free authentication info */ 977 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 978 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 979 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 980 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 981 982 if_free_sadl(ifp); 983 } 984 985 /* 986 * Flush the interface output queue. 987 */ 988 void 989 sppp_flush(struct ifnet *ifp) 990 { 991 struct sppp *sp = (struct sppp*) ifp; 992 993 IFQ_PURGE (&sp->pp_if.if_snd); 994 IF_PURGE (&sp->pp_fastq); 995 IF_PURGE (&sp->pp_cpq); 996 } 997 998 /* 999 * Check if the output queue is empty. 1000 */ 1001 int 1002 sppp_isempty(struct ifnet *ifp) 1003 { 1004 struct sppp *sp = (struct sppp*) ifp; 1005 int empty, s; 1006 1007 s = splnet(); 1008 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1009 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1010 splx(s); 1011 return (empty); 1012 } 1013 1014 /* 1015 * Get next packet to send. 1016 */ 1017 struct mbuf * 1018 sppp_dequeue(struct ifnet *ifp) 1019 { 1020 struct sppp *sp = (struct sppp*) ifp; 1021 struct mbuf *m; 1022 int s; 1023 1024 s = splnet(); 1025 /* 1026 * Process only the control protocol queue until we have at 1027 * least one NCP open. 1028 * 1029 * Do always serve all three queues in Cisco mode. 1030 */ 1031 IF_DEQUEUE(&sp->pp_cpq, m); 1032 if (m == NULL && 1033 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1034 IF_DEQUEUE(&sp->pp_fastq, m); 1035 if (m == NULL) 1036 IF_DEQUEUE (&sp->pp_if.if_snd, m); 1037 } 1038 splx(s); 1039 return m; 1040 } 1041 1042 /* 1043 * Pick the next packet, do not remove it from the queue. 1044 */ 1045 struct mbuf * 1046 sppp_pick(struct ifnet *ifp) 1047 { 1048 struct sppp *sp = (struct sppp*)ifp; 1049 struct mbuf *m; 1050 int s; 1051 1052 s= splnet (); 1053 1054 m = sp->pp_cpq.ifq_head; 1055 if (m == NULL && 1056 (sp->pp_phase == SPPP_PHASE_NETWORK || 1057 (sp->pp_flags & PP_CISCO) != 0)) 1058 if ((m = sp->pp_fastq.ifq_head) == NULL) 1059 m = sp->pp_if.if_snd.ifq_head; 1060 splx (s); 1061 return (m); 1062 } 1063 1064 /* 1065 * Process an ioctl request. Called on low priority level. 1066 */ 1067 int 1068 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1069 { 1070 struct ifreq *ifr = (struct ifreq*) data; 1071 struct sppp *sp = (struct sppp*) ifp; 1072 int s, error=0, going_up, going_down, newmode; 1073 1074 s = splnet(); 1075 switch (cmd) { 1076 case SIOCAIFADDR: 1077 case SIOCSIFDSTADDR: 1078 break; 1079 1080 case SIOCSIFADDR: 1081 if_up(ifp); 1082 /* fall through... */ 1083 1084 case SIOCSIFFLAGS: 1085 going_up = ifp->if_flags & IFF_UP && 1086 (ifp->if_flags & IFF_RUNNING) == 0; 1087 going_down = (ifp->if_flags & IFF_UP) == 0 && 1088 ifp->if_flags & IFF_RUNNING; 1089 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1090 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1091 /* sanity */ 1092 newmode = IFF_PASSIVE; 1093 ifp->if_flags &= ~IFF_AUTO; 1094 } 1095 1096 if (going_up || going_down) 1097 lcp.Close(sp); 1098 if (going_up && newmode == 0) { 1099 /* neither auto-dial nor passive */ 1100 ifp->if_flags |= IFF_RUNNING; 1101 if (!(sp->pp_flags & PP_CISCO)) 1102 lcp.Open(sp); 1103 } else if (going_down) { 1104 sppp_flush(ifp); 1105 ifp->if_flags &= ~IFF_RUNNING; 1106 } 1107 1108 break; 1109 1110 #ifdef SIOCSIFMTU 1111 #ifndef ifr_mtu 1112 #define ifr_mtu ifr_metric 1113 #endif 1114 case SIOCSIFMTU: 1115 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru) 1116 return (EINVAL); 1117 ifp->if_mtu = ifr->ifr_mtu; 1118 break; 1119 #endif 1120 #ifdef SLIOCSETMTU 1121 case SLIOCSETMTU: 1122 if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru) 1123 return (EINVAL); 1124 ifp->if_mtu = *(short*)data; 1125 break; 1126 #endif 1127 #ifdef SIOCGIFMTU 1128 case SIOCGIFMTU: 1129 ifr->ifr_mtu = ifp->if_mtu; 1130 break; 1131 #endif 1132 #ifdef SLIOCGETMTU 1133 case SLIOCGETMTU: 1134 *(short*)data = ifp->if_mtu; 1135 break; 1136 #endif 1137 case SIOCADDMULTI: 1138 case SIOCDELMULTI: 1139 break; 1140 1141 case SPPPSETAUTHCFG: 1142 case SPPPSETLCPCFG: 1143 case SPPPSETIDLETO: 1144 case SPPPSETAUTHFAILURE: 1145 case SPPPSETDNSOPTS: 1146 { 1147 struct proc *p = curproc; /* XXX */ 1148 1149 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1150 break; 1151 } 1152 /* FALLTHROUGH */ 1153 case SPPPGETAUTHCFG: 1154 case SPPPGETLCPCFG: 1155 case SPPPGETSTATUS: 1156 case SPPPGETIDLETO: 1157 case SPPPGETAUTHFAILURES: 1158 case SPPPGETDNSOPTS: 1159 case SPPPGETDNSADDRS: 1160 error = sppp_params(sp, cmd, data); 1161 break; 1162 1163 default: 1164 error = ENOTTY; 1165 } 1166 splx(s); 1167 return (error); 1168 } 1169 1170 1171 /* 1172 * Cisco framing implementation. 1173 */ 1174 1175 /* 1176 * Handle incoming Cisco keepalive protocol packets. 1177 */ 1178 static void 1179 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1180 { 1181 STDDCL; 1182 struct cisco_packet *h; 1183 u_int32_t me, mymask; 1184 1185 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1186 if (debug) 1187 log(LOG_DEBUG, 1188 SPP_FMT "cisco invalid packet length: %d bytes\n", 1189 SPP_ARGS(ifp), m->m_pkthdr.len); 1190 return; 1191 } 1192 h = mtod (m, struct cisco_packet*); 1193 if (debug) 1194 log(LOG_DEBUG, 1195 SPP_FMT "cisco input: %d bytes " 1196 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1197 SPP_ARGS(ifp), m->m_pkthdr.len, 1198 ntohl (h->type), h->par1, h->par2, (u_int)h->rel, 1199 (u_int)h->time0, (u_int)h->time1); 1200 switch (ntohl (h->type)) { 1201 default: 1202 if (debug) 1203 addlog(SPP_FMT "cisco unknown packet type: 0x%x\n", 1204 SPP_ARGS(ifp), ntohl (h->type)); 1205 break; 1206 case CISCO_ADDR_REPLY: 1207 /* Reply on address request, ignore */ 1208 break; 1209 case CISCO_KEEPALIVE_REQ: 1210 sp->pp_alivecnt = 0; 1211 sp->pp_rseq[IDX_LCP] = ntohl (h->par1); 1212 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1213 /* Local and remote sequence numbers are equal. 1214 * Probably, the line is in loopback mode. */ 1215 if (sp->pp_loopcnt >= MAXALIVECNT) { 1216 printf (SPP_FMT "loopback\n", 1217 SPP_ARGS(ifp)); 1218 sp->pp_loopcnt = 0; 1219 if (ifp->if_flags & IFF_UP) { 1220 if_down (ifp); 1221 IF_PURGE (&sp->pp_cpq); 1222 } 1223 } 1224 ++sp->pp_loopcnt; 1225 1226 /* Generate new local sequence number */ 1227 sp->pp_seq[IDX_LCP] = random(); 1228 break; 1229 } 1230 sp->pp_loopcnt = 0; 1231 if (! (ifp->if_flags & IFF_UP) && 1232 (ifp->if_flags & IFF_RUNNING)) { 1233 if_up(ifp); 1234 } 1235 break; 1236 case CISCO_ADDR_REQ: 1237 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1238 if (me != 0L) 1239 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1240 break; 1241 } 1242 } 1243 1244 /* 1245 * Send Cisco keepalive packet. 1246 */ 1247 static void 1248 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1249 { 1250 STDDCL; 1251 struct ppp_header *h; 1252 struct cisco_packet *ch; 1253 struct mbuf *m; 1254 u_int32_t t = (time.tv_sec - boottime.tv_sec) * 1000; 1255 1256 MGETHDR (m, M_DONTWAIT, MT_DATA); 1257 if (! m) 1258 return; 1259 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1260 m->m_pkthdr.rcvif = 0; 1261 1262 h = mtod (m, struct ppp_header*); 1263 h->address = CISCO_MULTICAST; 1264 h->control = 0; 1265 h->protocol = htons (CISCO_KEEPALIVE); 1266 1267 ch = (struct cisco_packet*) (h + 1); 1268 ch->type = htonl (type); 1269 ch->par1 = htonl (par1); 1270 ch->par2 = htonl (par2); 1271 ch->rel = -1; 1272 1273 ch->time0 = htons ((u_short) (t >> 16)); 1274 ch->time1 = htons ((u_short) t); 1275 1276 if (debug) 1277 log(LOG_DEBUG, 1278 SPP_FMT "cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1279 SPP_ARGS(ifp), ntohl (ch->type), ch->par1, 1280 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1281 (u_int)ch->time1); 1282 1283 if (IF_QFULL (&sp->pp_cpq)) { 1284 IF_DROP (&sp->pp_fastq); 1285 IF_DROP (&ifp->if_snd); 1286 m_freem (m); 1287 } else 1288 IF_ENQUEUE (&sp->pp_cpq, m); 1289 if (! (ifp->if_flags & IFF_OACTIVE)) 1290 (*ifp->if_start) (ifp); 1291 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1292 } 1293 1294 /* 1295 * PPP protocol implementation. 1296 */ 1297 1298 /* 1299 * Send PPP control protocol packet. 1300 */ 1301 static void 1302 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1303 u_char ident, u_short len, void *data) 1304 { 1305 STDDCL; 1306 struct lcp_header *lh; 1307 struct mbuf *m; 1308 size_t pkthdrlen; 1309 1310 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1311 1312 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1313 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1314 MGETHDR (m, M_DONTWAIT, MT_DATA); 1315 if (! m) 1316 return; 1317 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1318 m->m_pkthdr.rcvif = 0; 1319 1320 if (sp->pp_flags & PP_NOFRAMING) { 1321 *mtod(m, u_int16_t*) = htons(proto); 1322 lh = (struct lcp_header*)(mtod(m, u_int8_t*) + 2); 1323 } else { 1324 struct ppp_header *h; 1325 h = mtod (m, struct ppp_header*); 1326 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1327 h->control = PPP_UI; /* Unnumbered Info */ 1328 h->protocol = htons (proto); /* Link Control Protocol */ 1329 lh = (struct lcp_header*) (h + 1); 1330 } 1331 lh->type = type; 1332 lh->ident = ident; 1333 lh->len = htons (LCP_HEADER_LEN + len); 1334 if (len) 1335 bcopy (data, lh+1, len); 1336 1337 if (debug) { 1338 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 1339 SPP_ARGS(ifp), 1340 sppp_proto_name(proto), 1341 sppp_cp_type_name (lh->type), lh->ident, 1342 ntohs (lh->len)); 1343 if (len) 1344 sppp_print_bytes ((u_char*) (lh+1), len); 1345 addlog(">\n"); 1346 } 1347 if (IF_QFULL (&sp->pp_cpq)) { 1348 IF_DROP (&sp->pp_fastq); 1349 IF_DROP (&ifp->if_snd); 1350 m_freem (m); 1351 ++ifp->if_oerrors; 1352 } else 1353 IF_ENQUEUE (&sp->pp_cpq, m); 1354 if (! (ifp->if_flags & IFF_OACTIVE)) 1355 (*ifp->if_start) (ifp); 1356 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1357 } 1358 1359 /* 1360 * Handle incoming PPP control protocol packets. 1361 */ 1362 static void 1363 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1364 { 1365 STDDCL; 1366 struct lcp_header *h; 1367 int len = m->m_pkthdr.len; 1368 int rv; 1369 u_char *p; 1370 u_int32_t u32; 1371 1372 if (len < 4) { 1373 if (debug) 1374 log(LOG_DEBUG, 1375 SPP_FMT "%s invalid packet length: %d bytes\n", 1376 SPP_ARGS(ifp), cp->name, len); 1377 return; 1378 } 1379 h = mtod (m, struct lcp_header*); 1380 if (debug) { 1381 log(LOG_DEBUG, 1382 SPP_FMT "%s input(%s): <%s id=0x%x len=%d", 1383 SPP_ARGS(ifp), cp->name, 1384 sppp_state_name(sp->state[cp->protoidx]), 1385 sppp_cp_type_name (h->type), h->ident, ntohs (h->len)); 1386 if (len > 4) 1387 sppp_print_bytes ((u_char*) (h+1), len-4); 1388 addlog(">\n"); 1389 } 1390 if (len > ntohs (h->len)) 1391 len = ntohs (h->len); 1392 p = (u_char *)(h + 1); 1393 switch (h->type) { 1394 case CONF_REQ: 1395 if (len < 4) { 1396 if (debug) 1397 addlog(SPP_FMT "%s invalid conf-req length %d\n", 1398 SPP_ARGS(ifp), cp->name, 1399 len); 1400 ++ifp->if_ierrors; 1401 break; 1402 } 1403 /* handle states where RCR doesn't get a SCA/SCN */ 1404 switch (sp->state[cp->protoidx]) { 1405 case STATE_CLOSING: 1406 case STATE_STOPPING: 1407 return; 1408 case STATE_CLOSED: 1409 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1410 0, 0); 1411 return; 1412 } 1413 rv = (cp->RCR)(sp, h, len); 1414 switch (sp->state[cp->protoidx]) { 1415 case STATE_OPENED: 1416 (cp->tld)(sp); 1417 (cp->scr)(sp); 1418 /* fall through... */ 1419 case STATE_ACK_SENT: 1420 case STATE_REQ_SENT: 1421 sppp_cp_change_state(cp, sp, rv? 1422 STATE_ACK_SENT: STATE_REQ_SENT); 1423 break; 1424 case STATE_STOPPED: 1425 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1426 (cp->scr)(sp); 1427 sppp_cp_change_state(cp, sp, rv? 1428 STATE_ACK_SENT: STATE_REQ_SENT); 1429 break; 1430 case STATE_ACK_RCVD: 1431 if (rv) { 1432 sppp_cp_change_state(cp, sp, STATE_OPENED); 1433 if (debug) 1434 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1435 SPP_ARGS(ifp), 1436 cp->name); 1437 (cp->tlu)(sp); 1438 } else 1439 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1440 break; 1441 default: 1442 printf(SPP_FMT "%s illegal %s in state %s\n", 1443 SPP_ARGS(ifp), cp->name, 1444 sppp_cp_type_name(h->type), 1445 sppp_state_name(sp->state[cp->protoidx])); 1446 ++ifp->if_ierrors; 1447 } 1448 break; 1449 case CONF_ACK: 1450 if (h->ident != sp->confid[cp->protoidx]) { 1451 if (debug) 1452 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1453 SPP_ARGS(ifp), cp->name, 1454 h->ident, sp->confid[cp->protoidx]); 1455 ++ifp->if_ierrors; 1456 break; 1457 } 1458 switch (sp->state[cp->protoidx]) { 1459 case STATE_CLOSED: 1460 case STATE_STOPPED: 1461 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1462 break; 1463 case STATE_CLOSING: 1464 case STATE_STOPPING: 1465 break; 1466 case STATE_REQ_SENT: 1467 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1468 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1469 break; 1470 case STATE_OPENED: 1471 (cp->tld)(sp); 1472 /* fall through */ 1473 case STATE_ACK_RCVD: 1474 (cp->scr)(sp); 1475 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1476 break; 1477 case STATE_ACK_SENT: 1478 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1479 sppp_cp_change_state(cp, sp, STATE_OPENED); 1480 if (debug) 1481 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1482 SPP_ARGS(ifp), cp->name); 1483 (cp->tlu)(sp); 1484 break; 1485 default: 1486 printf(SPP_FMT "%s illegal %s in state %s\n", 1487 SPP_ARGS(ifp), cp->name, 1488 sppp_cp_type_name(h->type), 1489 sppp_state_name(sp->state[cp->protoidx])); 1490 ++ifp->if_ierrors; 1491 } 1492 break; 1493 case CONF_NAK: 1494 case CONF_REJ: 1495 if (h->ident != sp->confid[cp->protoidx]) { 1496 if (debug) 1497 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1498 SPP_ARGS(ifp), cp->name, 1499 h->ident, sp->confid[cp->protoidx]); 1500 ++ifp->if_ierrors; 1501 break; 1502 } 1503 if (h->type == CONF_NAK) 1504 (cp->RCN_nak)(sp, h, len); 1505 else /* CONF_REJ */ 1506 (cp->RCN_rej)(sp, h, len); 1507 1508 switch (sp->state[cp->protoidx]) { 1509 case STATE_CLOSED: 1510 case STATE_STOPPED: 1511 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1512 break; 1513 case STATE_REQ_SENT: 1514 case STATE_ACK_SENT: 1515 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1516 (cp->scr)(sp); 1517 break; 1518 case STATE_OPENED: 1519 (cp->tld)(sp); 1520 /* fall through */ 1521 case STATE_ACK_RCVD: 1522 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1523 (cp->scr)(sp); 1524 break; 1525 case STATE_CLOSING: 1526 case STATE_STOPPING: 1527 break; 1528 default: 1529 printf(SPP_FMT "%s illegal %s in state %s\n", 1530 SPP_ARGS(ifp), cp->name, 1531 sppp_cp_type_name(h->type), 1532 sppp_state_name(sp->state[cp->protoidx])); 1533 ++ifp->if_ierrors; 1534 } 1535 break; 1536 1537 case TERM_REQ: 1538 switch (sp->state[cp->protoidx]) { 1539 case STATE_ACK_RCVD: 1540 case STATE_ACK_SENT: 1541 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1542 /* fall through */ 1543 case STATE_CLOSED: 1544 case STATE_STOPPED: 1545 case STATE_CLOSING: 1546 case STATE_STOPPING: 1547 case STATE_REQ_SENT: 1548 sta: 1549 /* Send Terminate-Ack packet. */ 1550 if (debug) 1551 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n", 1552 SPP_ARGS(ifp), cp->name); 1553 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1554 break; 1555 case STATE_OPENED: 1556 (cp->tld)(sp); 1557 sp->rst_counter[cp->protoidx] = 0; 1558 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1559 goto sta; 1560 break; 1561 default: 1562 printf(SPP_FMT "%s illegal %s in state %s\n", 1563 SPP_ARGS(ifp), cp->name, 1564 sppp_cp_type_name(h->type), 1565 sppp_state_name(sp->state[cp->protoidx])); 1566 ++ifp->if_ierrors; 1567 } 1568 break; 1569 case TERM_ACK: 1570 switch (sp->state[cp->protoidx]) { 1571 case STATE_CLOSED: 1572 case STATE_STOPPED: 1573 case STATE_REQ_SENT: 1574 case STATE_ACK_SENT: 1575 break; 1576 case STATE_CLOSING: 1577 (cp->tlf)(sp); 1578 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1579 sppp_lcp_check_and_close(sp); 1580 break; 1581 case STATE_STOPPING: 1582 (cp->tlf)(sp); 1583 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1584 sppp_lcp_check_and_close(sp); 1585 break; 1586 case STATE_ACK_RCVD: 1587 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1588 break; 1589 case STATE_OPENED: 1590 (cp->tld)(sp); 1591 (cp->scr)(sp); 1592 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1593 break; 1594 default: 1595 printf(SPP_FMT "%s illegal %s in state %s\n", 1596 SPP_ARGS(ifp), cp->name, 1597 sppp_cp_type_name(h->type), 1598 sppp_state_name(sp->state[cp->protoidx])); 1599 ++ifp->if_ierrors; 1600 } 1601 break; 1602 case CODE_REJ: 1603 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1604 log(LOG_INFO, 1605 SPP_FMT "%s: ignoring RXJ (%s) for code ?, " 1606 "danger will robinson\n", 1607 SPP_ARGS(ifp), cp->name, 1608 sppp_cp_type_name(h->type)); 1609 switch (sp->state[cp->protoidx]) { 1610 case STATE_CLOSED: 1611 case STATE_STOPPED: 1612 case STATE_REQ_SENT: 1613 case STATE_ACK_SENT: 1614 case STATE_CLOSING: 1615 case STATE_STOPPING: 1616 case STATE_OPENED: 1617 break; 1618 case STATE_ACK_RCVD: 1619 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1620 break; 1621 default: 1622 printf(SPP_FMT "%s illegal %s in state %s\n", 1623 SPP_ARGS(ifp), cp->name, 1624 sppp_cp_type_name(h->type), 1625 sppp_state_name(sp->state[cp->protoidx])); 1626 ++ifp->if_ierrors; 1627 } 1628 break; 1629 case PROTO_REJ: 1630 { 1631 int catastrophic; 1632 const struct cp *upper; 1633 int i; 1634 u_int16_t proto; 1635 1636 catastrophic = 0; 1637 upper = NULL; 1638 proto = p[0] << 8 | p[1]; 1639 for (i = 0; i < IDX_COUNT; i++) { 1640 if (cps[i]->proto == proto) { 1641 upper = cps[i]; 1642 break; 1643 } 1644 } 1645 if (upper == NULL) 1646 catastrophic++; 1647 1648 if (debug) 1649 log(LOG_INFO, 1650 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1651 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+', 1652 sppp_cp_type_name(h->type), proto, 1653 upper ? upper->name : "unknown", 1654 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1655 1656 /* 1657 * if we got RXJ+ against conf-req, the peer does not implement 1658 * this particular protocol type. terminate the protocol. 1659 */ 1660 if (upper && !catastrophic) { 1661 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1662 upper->Close(sp); 1663 break; 1664 } 1665 } 1666 1667 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1668 switch (sp->state[cp->protoidx]) { 1669 case STATE_CLOSED: 1670 case STATE_STOPPED: 1671 case STATE_REQ_SENT: 1672 case STATE_ACK_SENT: 1673 case STATE_CLOSING: 1674 case STATE_STOPPING: 1675 case STATE_OPENED: 1676 break; 1677 case STATE_ACK_RCVD: 1678 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1679 break; 1680 default: 1681 printf(SPP_FMT "%s illegal %s in state %s\n", 1682 SPP_ARGS(ifp), cp->name, 1683 sppp_cp_type_name(h->type), 1684 sppp_state_name(sp->state[cp->protoidx])); 1685 ++ifp->if_ierrors; 1686 } 1687 break; 1688 } 1689 case DISC_REQ: 1690 if (cp->proto != PPP_LCP) 1691 goto illegal; 1692 /* Discard the packet. */ 1693 break; 1694 case ECHO_REQ: 1695 if (cp->proto != PPP_LCP) 1696 goto illegal; 1697 if (sp->state[cp->protoidx] != STATE_OPENED) { 1698 if (debug) 1699 addlog(SPP_FMT "lcp echo req but lcp closed\n", 1700 SPP_ARGS(ifp)); 1701 ++ifp->if_ierrors; 1702 break; 1703 } 1704 if (len < 8) { 1705 if (debug) 1706 addlog(SPP_FMT "invalid lcp echo request " 1707 "packet length: %d bytes\n", 1708 SPP_ARGS(ifp), len); 1709 break; 1710 } 1711 memcpy(&u32, h + 1, sizeof u32); 1712 if (ntohl(u32) == sp->lcp.magic) { 1713 /* Line loopback mode detected. */ 1714 printf(SPP_FMT "loopback\n", SPP_ARGS(ifp)); 1715 if_down (ifp); 1716 IF_PURGE (&sp->pp_cpq); 1717 1718 /* Shut down the PPP link. */ 1719 /* XXX */ 1720 lcp.Down(sp); 1721 lcp.Up(sp); 1722 break; 1723 } 1724 u32 = htonl(sp->lcp.magic); 1725 memcpy(h + 1, &u32, sizeof u32); 1726 if (debug) 1727 addlog(SPP_FMT "got lcp echo req, sending echo rep\n", 1728 SPP_ARGS(ifp)); 1729 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1); 1730 break; 1731 case ECHO_REPLY: 1732 if (cp->proto != PPP_LCP) 1733 goto illegal; 1734 if (h->ident != sp->lcp.echoid) { 1735 ++ifp->if_ierrors; 1736 break; 1737 } 1738 if (len < 8) { 1739 if (debug) 1740 addlog(SPP_FMT "lcp invalid echo reply " 1741 "packet length: %d bytes\n", 1742 SPP_ARGS(ifp), len); 1743 break; 1744 } 1745 if (debug) 1746 addlog(SPP_FMT "lcp got echo rep\n", 1747 SPP_ARGS(ifp)); 1748 memcpy(&u32, h + 1, sizeof u32); 1749 if (ntohl(u32) != sp->lcp.magic) 1750 sp->pp_alivecnt = 0; 1751 break; 1752 default: 1753 /* Unknown packet type -- send Code-Reject packet. */ 1754 illegal: 1755 if (debug) 1756 addlog(SPP_FMT "%s send code-rej for 0x%x\n", 1757 SPP_ARGS(ifp), cp->name, h->type); 1758 sppp_cp_send(sp, cp->proto, CODE_REJ, 1759 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1760 ++ifp->if_ierrors; 1761 } 1762 } 1763 1764 1765 /* 1766 * The generic part of all Up/Down/Open/Close/TO event handlers. 1767 * Basically, the state transition handling in the automaton. 1768 */ 1769 static void 1770 sppp_up_event(const struct cp *cp, struct sppp *sp) 1771 { 1772 STDDCL; 1773 1774 if (debug) 1775 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n", 1776 SPP_ARGS(ifp), cp->name, 1777 sppp_state_name(sp->state[cp->protoidx])); 1778 1779 switch (sp->state[cp->protoidx]) { 1780 case STATE_INITIAL: 1781 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1782 break; 1783 case STATE_STARTING: 1784 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1785 (cp->scr)(sp); 1786 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1787 break; 1788 default: 1789 printf(SPP_FMT "%s illegal up in state %s\n", 1790 SPP_ARGS(ifp), cp->name, 1791 sppp_state_name(sp->state[cp->protoidx])); 1792 } 1793 } 1794 1795 static void 1796 sppp_down_event(const struct cp *cp, struct sppp *sp) 1797 { 1798 STDDCL; 1799 1800 if (debug) 1801 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n", 1802 SPP_ARGS(ifp), cp->name, 1803 sppp_state_name(sp->state[cp->protoidx])); 1804 1805 switch (sp->state[cp->protoidx]) { 1806 case STATE_CLOSED: 1807 case STATE_CLOSING: 1808 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1809 break; 1810 case STATE_STOPPED: 1811 (cp->tls)(sp); 1812 /* fall through */ 1813 case STATE_STOPPING: 1814 case STATE_REQ_SENT: 1815 case STATE_ACK_RCVD: 1816 case STATE_ACK_SENT: 1817 sppp_cp_change_state(cp, sp, STATE_STARTING); 1818 break; 1819 case STATE_OPENED: 1820 (cp->tld)(sp); 1821 sppp_cp_change_state(cp, sp, STATE_STARTING); 1822 break; 1823 default: 1824 printf(SPP_FMT "%s illegal down in state %s\n", 1825 SPP_ARGS(ifp), cp->name, 1826 sppp_state_name(sp->state[cp->protoidx])); 1827 } 1828 } 1829 1830 1831 static void 1832 sppp_open_event(const struct cp *cp, struct sppp *sp) 1833 { 1834 STDDCL; 1835 1836 if (debug) 1837 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n", 1838 SPP_ARGS(ifp), cp->name, 1839 sppp_state_name(sp->state[cp->protoidx])); 1840 1841 switch (sp->state[cp->protoidx]) { 1842 case STATE_INITIAL: 1843 (cp->tls)(sp); 1844 sppp_cp_change_state(cp, sp, STATE_STARTING); 1845 break; 1846 case STATE_STARTING: 1847 break; 1848 case STATE_CLOSED: 1849 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1850 (cp->scr)(sp); 1851 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1852 break; 1853 case STATE_STOPPED: 1854 case STATE_STOPPING: 1855 case STATE_REQ_SENT: 1856 case STATE_ACK_RCVD: 1857 case STATE_ACK_SENT: 1858 case STATE_OPENED: 1859 break; 1860 case STATE_CLOSING: 1861 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1862 break; 1863 } 1864 } 1865 1866 1867 static void 1868 sppp_close_event(const struct cp *cp, struct sppp *sp) 1869 { 1870 STDDCL; 1871 1872 if (debug) 1873 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n", 1874 SPP_ARGS(ifp), cp->name, 1875 sppp_state_name(sp->state[cp->protoidx])); 1876 1877 switch (sp->state[cp->protoidx]) { 1878 case STATE_INITIAL: 1879 case STATE_CLOSED: 1880 case STATE_CLOSING: 1881 break; 1882 case STATE_STARTING: 1883 (cp->tlf)(sp); 1884 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1885 break; 1886 case STATE_STOPPED: 1887 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1888 break; 1889 case STATE_STOPPING: 1890 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1891 break; 1892 case STATE_OPENED: 1893 (cp->tld)(sp); 1894 /* fall through */ 1895 case STATE_REQ_SENT: 1896 case STATE_ACK_RCVD: 1897 case STATE_ACK_SENT: 1898 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 1899 sppp_cp_send(sp, cp->proto, TERM_REQ, 1900 ++sp->pp_seq[cp->protoidx], 0, 0); 1901 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1902 break; 1903 } 1904 } 1905 1906 static void 1907 sppp_to_event(const struct cp *cp, struct sppp *sp) 1908 { 1909 STDDCL; 1910 int s; 1911 1912 s = splnet(); 1913 if (debug) 1914 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n", 1915 SPP_ARGS(ifp), cp->name, 1916 sppp_state_name(sp->state[cp->protoidx]), 1917 sp->rst_counter[cp->protoidx]); 1918 1919 if (--sp->rst_counter[cp->protoidx] < 0) 1920 /* TO- event */ 1921 switch (sp->state[cp->protoidx]) { 1922 case STATE_CLOSING: 1923 (cp->tlf)(sp); 1924 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1925 sppp_lcp_check_and_close(sp); 1926 break; 1927 case STATE_STOPPING: 1928 (cp->tlf)(sp); 1929 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1930 sppp_lcp_check_and_close(sp); 1931 break; 1932 case STATE_REQ_SENT: 1933 case STATE_ACK_RCVD: 1934 case STATE_ACK_SENT: 1935 (cp->tlf)(sp); 1936 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1937 sppp_lcp_check_and_close(sp); 1938 break; 1939 } 1940 else 1941 /* TO+ event */ 1942 switch (sp->state[cp->protoidx]) { 1943 case STATE_CLOSING: 1944 case STATE_STOPPING: 1945 sppp_cp_send(sp, cp->proto, TERM_REQ, 1946 ++sp->pp_seq[cp->protoidx], 0, 0); 1947 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1948 cp->TO, sp); 1949 break; 1950 case STATE_REQ_SENT: 1951 case STATE_ACK_RCVD: 1952 (cp->scr)(sp); 1953 /* sppp_cp_change_state() will restart the timer */ 1954 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1955 break; 1956 case STATE_ACK_SENT: 1957 (cp->scr)(sp); 1958 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1959 cp->TO, sp); 1960 break; 1961 } 1962 1963 splx(s); 1964 } 1965 1966 /* 1967 * Change the state of a control protocol in the state automaton. 1968 * Takes care of starting/stopping the restart timer. 1969 */ 1970 void 1971 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 1972 { 1973 sp->state[cp->protoidx] = newstate; 1974 callout_stop(&sp->ch[cp->protoidx]); 1975 switch (newstate) { 1976 case STATE_INITIAL: 1977 case STATE_STARTING: 1978 case STATE_CLOSED: 1979 case STATE_STOPPED: 1980 case STATE_OPENED: 1981 break; 1982 case STATE_CLOSING: 1983 case STATE_STOPPING: 1984 case STATE_REQ_SENT: 1985 case STATE_ACK_RCVD: 1986 case STATE_ACK_SENT: 1987 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1988 cp->TO, sp); 1989 break; 1990 } 1991 } 1992 1993 /* 1994 *--------------------------------------------------------------------------* 1995 * * 1996 * The LCP implementation. * 1997 * * 1998 *--------------------------------------------------------------------------* 1999 */ 2000 static void 2001 sppp_lcp_init(struct sppp *sp) 2002 { 2003 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 2004 sp->lcp.magic = 0; 2005 sp->state[IDX_LCP] = STATE_INITIAL; 2006 sp->fail_counter[IDX_LCP] = 0; 2007 sp->pp_seq[IDX_LCP] = 0; 2008 sp->pp_rseq[IDX_LCP] = 0; 2009 sp->lcp.protos = 0; 2010 sp->lcp.mru = sp->lcp.their_mru = PP_MTU; 2011 2012 /* 2013 * Initialize counters and timeout values. Note that we don't 2014 * use the 3 seconds suggested in RFC 1661 since we are likely 2015 * running on a fast link. XXX We should probably implement 2016 * the exponential backoff option. Note that these values are 2017 * relevant for all control protocols, not just LCP only. 2018 */ 2019 sp->lcp.timeout = 1 * hz; 2020 sp->lcp.max_terminate = 2; 2021 sp->lcp.max_configure = 10; 2022 sp->lcp.max_failure = 10; 2023 callout_init(&sp->ch[IDX_LCP]); 2024 } 2025 2026 static void 2027 sppp_lcp_up(struct sppp *sp) 2028 { 2029 STDDCL; 2030 2031 /* Initialize activity timestamp: opening a connection is an activity */ 2032 sp->pp_last_activity = time.tv_sec; 2033 2034 /* 2035 * If this interface is passive or dial-on-demand, and we are 2036 * still in Initial state, it means we've got an incoming 2037 * call. Activate the interface. 2038 */ 2039 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2040 if (debug) 2041 log(LOG_DEBUG, 2042 SPP_FMT "Up event", SPP_ARGS(ifp)); 2043 ifp->if_flags |= IFF_RUNNING; 2044 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2045 if (debug) 2046 addlog("(incoming call)\n"); 2047 sp->pp_flags |= PP_CALLIN; 2048 lcp.Open(sp); 2049 } else if (debug) 2050 addlog("\n"); 2051 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && 2052 (sp->state[IDX_LCP] == STATE_INITIAL)) { 2053 ifp->if_flags |= IFF_RUNNING; 2054 lcp.Open(sp); 2055 } 2056 2057 sppp_up_event(&lcp, sp); 2058 } 2059 2060 static void 2061 sppp_lcp_down(struct sppp *sp) 2062 { 2063 STDDCL; 2064 2065 sppp_down_event(&lcp, sp); 2066 2067 /* 2068 * If this is neither a dial-on-demand nor a passive 2069 * interface, simulate an ``ifconfig down'' action, so the 2070 * administrator can force a redial by another ``ifconfig 2071 * up''. XXX For leased line operation, should we immediately 2072 * try to reopen the connection here? 2073 */ 2074 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2075 if (debug) 2076 log(LOG_INFO, 2077 SPP_FMT "Down event (carrier loss), taking interface down.\n", 2078 SPP_ARGS(ifp)); 2079 if_down(ifp); 2080 } else { 2081 if (debug) 2082 log(LOG_DEBUG, 2083 SPP_FMT "Down event (carrier loss)\n", 2084 SPP_ARGS(ifp)); 2085 } 2086 sp->pp_flags &= ~PP_CALLIN; 2087 if (sp->state[IDX_LCP] != STATE_INITIAL) 2088 lcp.Close(sp); 2089 ifp->if_flags &= ~IFF_RUNNING; 2090 } 2091 2092 static void 2093 sppp_lcp_open(struct sppp *sp) 2094 { 2095 /* 2096 * If we are authenticator, negotiate LCP_AUTH 2097 */ 2098 if (sp->hisauth.proto != 0) 2099 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2100 else 2101 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2102 sp->pp_flags &= ~PP_NEEDAUTH; 2103 sppp_open_event(&lcp, sp); 2104 } 2105 2106 static void 2107 sppp_lcp_close(struct sppp *sp) 2108 { 2109 sppp_close_event(&lcp, sp); 2110 } 2111 2112 static void 2113 sppp_lcp_TO(void *cookie) 2114 { 2115 sppp_to_event(&lcp, (struct sppp *)cookie); 2116 } 2117 2118 /* 2119 * Analyze a configure request. Return true if it was agreeable, and 2120 * caused action sca, false if it has been rejected or nak'ed, and 2121 * caused action scn. (The return value is used to make the state 2122 * transition decision in the state automaton.) 2123 */ 2124 static int 2125 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2126 { 2127 STDDCL; 2128 u_char *buf, *r, *p; 2129 int origlen, rlen; 2130 u_int32_t nmagic; 2131 u_short authproto; 2132 2133 len -= 4; 2134 origlen = len; 2135 buf = r = malloc (len, M_TEMP, M_NOWAIT); 2136 if (! buf) 2137 return (0); 2138 2139 if (debug) 2140 log(LOG_DEBUG, SPP_FMT "lcp parse opts:", 2141 SPP_ARGS(ifp)); 2142 2143 /* pass 1: check for things that need to be rejected */ 2144 p = (void*) (h+1); 2145 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2146 if (debug) 2147 addlog(" %s", sppp_lcp_opt_name(*p)); 2148 switch (*p) { 2149 case LCP_OPT_MAGIC: 2150 /* Magic number. */ 2151 /* fall through, both are same length */ 2152 case LCP_OPT_ASYNC_MAP: 2153 /* Async control character map. */ 2154 if (len >= 6 || p[1] == 6) 2155 continue; 2156 if (debug) 2157 addlog(" [invalid]"); 2158 break; 2159 case LCP_OPT_MRU: 2160 /* Maximum receive unit. */ 2161 if (len >= 4 && p[1] == 4) 2162 continue; 2163 if (debug) 2164 addlog(" [invalid]"); 2165 break; 2166 case LCP_OPT_AUTH_PROTO: 2167 if (len < 4) { 2168 if (debug) 2169 addlog(" [invalid]"); 2170 break; 2171 } 2172 authproto = (p[2] << 8) + p[3]; 2173 if (authproto == PPP_CHAP && p[1] != 5) { 2174 if (debug) 2175 addlog(" [invalid chap len]"); 2176 break; 2177 } 2178 if (sp->myauth.proto == 0) { 2179 /* we are not configured to do auth */ 2180 if (debug) 2181 addlog(" [not configured]"); 2182 break; 2183 } 2184 /* 2185 * Remote want us to authenticate, remember this, 2186 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2187 * up. 2188 */ 2189 sp->pp_flags |= PP_NEEDAUTH; 2190 continue; 2191 default: 2192 /* Others not supported. */ 2193 if (debug) 2194 addlog(" [rej]"); 2195 break; 2196 } 2197 /* Add the option to rejected list. */ 2198 bcopy (p, r, p[1]); 2199 r += p[1]; 2200 rlen += p[1]; 2201 } 2202 if (rlen) { 2203 if (debug) 2204 addlog(" send conf-rej\n"); 2205 sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2206 goto end; 2207 } else if (debug) 2208 addlog("\n"); 2209 2210 /* 2211 * pass 2: check for option values that are unacceptable and 2212 * thus require to be nak'ed. 2213 */ 2214 if (debug) 2215 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ", 2216 SPP_ARGS(ifp)); 2217 2218 p = (void*) (h+1); 2219 len = origlen; 2220 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2221 if (debug) 2222 addlog(" %s", sppp_lcp_opt_name(*p)); 2223 switch (*p) { 2224 case LCP_OPT_MAGIC: 2225 /* Magic number -- extract. */ 2226 nmagic = (u_int32_t)p[2] << 24 | 2227 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2228 if (nmagic != sp->lcp.magic) { 2229 if (debug) 2230 addlog(" 0x%x", nmagic); 2231 continue; 2232 } 2233 /* 2234 * Local and remote magics equal -- loopback? 2235 */ 2236 if (sp->pp_loopcnt >= MAXALIVECNT*5) { 2237 printf (SPP_FMT "loopback\n", 2238 SPP_ARGS(ifp)); 2239 sp->pp_loopcnt = 0; 2240 if (ifp->if_flags & IFF_UP) { 2241 if_down(ifp); 2242 IF_PURGE(&sp->pp_cpq); 2243 /* XXX ? */ 2244 lcp.Down(sp); 2245 lcp.Up(sp); 2246 } 2247 } else if (debug) 2248 addlog(" [glitch]"); 2249 ++sp->pp_loopcnt; 2250 /* 2251 * We negate our magic here, and NAK it. If 2252 * we see it later in an NAK packet, we 2253 * suggest a new one. 2254 */ 2255 nmagic = ~sp->lcp.magic; 2256 /* Gonna NAK it. */ 2257 p[2] = nmagic >> 24; 2258 p[3] = nmagic >> 16; 2259 p[4] = nmagic >> 8; 2260 p[5] = nmagic; 2261 break; 2262 2263 case LCP_OPT_ASYNC_MAP: 2264 /* Async control character map -- check to be zero. */ 2265 if (! p[2] && ! p[3] && ! p[4] && ! p[5]) { 2266 if (debug) 2267 addlog(" [empty]"); 2268 continue; 2269 } 2270 if (debug) 2271 addlog(" [non-empty]"); 2272 /* suggest a zero one */ 2273 #ifndef BROKEN_98 /* XXX - broken Win98 drivers INSIST on having an ASYNC_MAP */ 2274 p[2] = p[3] = p[4] = p[5] = 0; 2275 break; 2276 #else 2277 continue; 2278 #endif 2279 2280 case LCP_OPT_MRU: 2281 /* 2282 * Maximum receive unit. Always agreeable, 2283 * but ignored by now. 2284 */ 2285 sp->lcp.their_mru = p[2] * 256 + p[3]; 2286 if (debug) 2287 addlog(" %ld", sp->lcp.their_mru); 2288 continue; 2289 2290 case LCP_OPT_AUTH_PROTO: 2291 authproto = (p[2] << 8) + p[3]; 2292 if (sp->myauth.proto != authproto) { 2293 /* not agreed, nak */ 2294 if (debug) 2295 addlog(" [mine %s != his %s]", 2296 sppp_proto_name(sp->hisauth.proto), 2297 sppp_proto_name(authproto)); 2298 p[2] = sp->myauth.proto >> 8; 2299 p[3] = sp->myauth.proto; 2300 break; 2301 } 2302 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2303 if (debug) 2304 addlog(" [chap not MD5]"); 2305 p[4] = CHAP_MD5; 2306 break; 2307 } 2308 continue; 2309 } 2310 /* Add the option to nak'ed list. */ 2311 bcopy (p, r, p[1]); 2312 r += p[1]; 2313 rlen += p[1]; 2314 } 2315 if (rlen) { 2316 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2317 if (debug) 2318 addlog(" max_failure (%d) exceeded, " 2319 "send conf-rej\n", 2320 sp->lcp.max_failure); 2321 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2322 } else { 2323 if (debug) 2324 addlog(" send conf-nak\n"); 2325 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2326 } 2327 goto end; 2328 } else { 2329 if (debug) 2330 addlog(" send conf-ack\n"); 2331 sp->fail_counter[IDX_LCP] = 0; 2332 sp->pp_loopcnt = 0; 2333 sppp_cp_send (sp, PPP_LCP, CONF_ACK, 2334 h->ident, origlen, h+1); 2335 } 2336 2337 end: 2338 free (buf, M_TEMP); 2339 return (rlen == 0); 2340 } 2341 2342 /* 2343 * Analyze the LCP Configure-Reject option list, and adjust our 2344 * negotiation. 2345 */ 2346 static void 2347 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2348 { 2349 STDDCL; 2350 u_char *buf, *p; 2351 2352 len -= 4; 2353 buf = malloc (len, M_TEMP, M_NOWAIT); 2354 if (!buf) 2355 return; 2356 2357 if (debug) 2358 log(LOG_DEBUG, SPP_FMT "lcp rej opts:", 2359 SPP_ARGS(ifp)); 2360 2361 p = (void*) (h+1); 2362 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2363 if (debug) 2364 addlog(" %s", sppp_lcp_opt_name(*p)); 2365 switch (*p) { 2366 case LCP_OPT_MAGIC: 2367 /* Magic number -- can't use it, use 0 */ 2368 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2369 sp->lcp.magic = 0; 2370 break; 2371 case LCP_OPT_MRU: 2372 /* 2373 * Should not be rejected anyway, since we only 2374 * negotiate a MRU if explicitly requested by 2375 * peer. 2376 */ 2377 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2378 break; 2379 case LCP_OPT_AUTH_PROTO: 2380 /* 2381 * Peer doesn't want to authenticate himself, 2382 * deny unless this is a dialout call, and 2383 * SPPP_AUTHFLAG_NOCALLOUT is set. 2384 */ 2385 if ((sp->pp_flags & PP_CALLIN) == 0 && 2386 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2387 if (debug) 2388 addlog(" [don't insist on auth " 2389 "for callout]"); 2390 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2391 break; 2392 } 2393 if (debug) 2394 addlog("[access denied]\n"); 2395 lcp.Close(sp); 2396 break; 2397 } 2398 } 2399 if (debug) 2400 addlog("\n"); 2401 free (buf, M_TEMP); 2402 return; 2403 } 2404 2405 /* 2406 * Analyze the LCP Configure-NAK option list, and adjust our 2407 * negotiation. 2408 */ 2409 static void 2410 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2411 { 2412 STDDCL; 2413 u_char *buf, *p; 2414 u_int32_t magic; 2415 2416 len -= 4; 2417 buf = malloc (len, M_TEMP, M_NOWAIT); 2418 if (!buf) 2419 return; 2420 2421 if (debug) 2422 log(LOG_DEBUG, SPP_FMT "lcp nak opts:", 2423 SPP_ARGS(ifp)); 2424 2425 p = (void*) (h+1); 2426 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2427 if (debug) 2428 addlog(" %s", sppp_lcp_opt_name(*p)); 2429 switch (*p) { 2430 case LCP_OPT_MAGIC: 2431 /* Magic number -- renegotiate */ 2432 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2433 len >= 6 && p[1] == 6) { 2434 magic = (u_int32_t)p[2] << 24 | 2435 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2436 /* 2437 * If the remote magic is our negated one, 2438 * this looks like a loopback problem. 2439 * Suggest a new magic to make sure. 2440 */ 2441 if (magic == ~sp->lcp.magic) { 2442 if (debug) 2443 addlog(" magic glitch"); 2444 sp->lcp.magic = random(); 2445 } else { 2446 sp->lcp.magic = magic; 2447 if (debug) 2448 addlog(" %d", magic); 2449 } 2450 } 2451 break; 2452 case LCP_OPT_MRU: 2453 /* 2454 * Peer wants to advise us to negotiate an MRU. 2455 * Agree on it if it's reasonable, or use 2456 * default otherwise. 2457 */ 2458 if (len >= 4 && p[1] == 4) { 2459 u_int mru = p[2] * 256 + p[3]; 2460 if (debug) 2461 addlog(" %d", mru); 2462 if (mru < PP_MTU || mru > PP_MAX_MRU) 2463 mru = PP_MTU; 2464 sp->lcp.mru = mru; 2465 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2466 } 2467 break; 2468 case LCP_OPT_AUTH_PROTO: 2469 /* 2470 * Peer doesn't like our authentication method, 2471 * deny. 2472 */ 2473 if (debug) 2474 addlog("[access denied]\n"); 2475 lcp.Close(sp); 2476 break; 2477 } 2478 } 2479 if (debug) 2480 addlog("\n"); 2481 free (buf, M_TEMP); 2482 return; 2483 } 2484 2485 static void 2486 sppp_lcp_tlu(struct sppp *sp) 2487 { 2488 STDDCL; 2489 int i; 2490 u_int32_t mask; 2491 2492 /* XXX ? */ 2493 if (! (ifp->if_flags & IFF_UP) && 2494 (ifp->if_flags & IFF_RUNNING)) { 2495 /* Coming out of loopback mode. */ 2496 if_up(ifp); 2497 } 2498 2499 for (i = 0; i < IDX_COUNT; i++) 2500 if ((cps[i])->flags & CP_QUAL) 2501 (cps[i])->Open(sp); 2502 2503 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2504 (sp->pp_flags & PP_NEEDAUTH) != 0) 2505 sp->pp_phase = SPPP_PHASE_AUTHENTICATE; 2506 else 2507 sp->pp_phase = SPPP_PHASE_NETWORK; 2508 2509 if(debug) 2510 { 2511 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2512 sppp_phase_name(sp->pp_phase)); 2513 } 2514 2515 /* 2516 * Open all authentication protocols. This is even required 2517 * if we already proceeded to network phase, since it might be 2518 * that remote wants us to authenticate, so we might have to 2519 * send a PAP request. Undesired authentication protocols 2520 * don't do anything when they get an Open event. 2521 */ 2522 for (i = 0; i < IDX_COUNT; i++) 2523 if ((cps[i])->flags & CP_AUTH) 2524 (cps[i])->Open(sp); 2525 2526 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2527 /* Notify all NCPs. */ 2528 for (i = 0; i < IDX_COUNT; i++) 2529 if ((cps[i])->flags & CP_NCP) 2530 (cps[i])->Open(sp); 2531 } 2532 2533 /* Send Up events to all started protos. */ 2534 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2535 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) 2536 (cps[i])->Up(sp); 2537 2538 /* notify low-level driver of state change */ 2539 if (sp->pp_chg) 2540 sp->pp_chg(sp, (int)sp->pp_phase); 2541 2542 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2543 /* if no NCP is starting, close down */ 2544 sppp_lcp_check_and_close(sp); 2545 } 2546 2547 static void 2548 sppp_lcp_tld(struct sppp *sp) 2549 { 2550 STDDCL; 2551 int i; 2552 u_int32_t mask; 2553 2554 sp->pp_phase = SPPP_PHASE_TERMINATE; 2555 2556 if(debug) 2557 { 2558 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2559 sppp_phase_name(sp->pp_phase)); 2560 } 2561 2562 /* 2563 * Take upper layers down. We send the Down event first and 2564 * the Close second to prevent the upper layers from sending 2565 * ``a flurry of terminate-request packets'', as the RFC 2566 * describes it. 2567 */ 2568 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2569 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2570 (cps[i])->Down(sp); 2571 (cps[i])->Close(sp); 2572 } 2573 } 2574 2575 static void 2576 sppp_lcp_tls(struct sppp *sp) 2577 { 2578 STDDCL; 2579 2580 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2581 printf("%s: authentication failed %d times, not retrying again\n", 2582 sp->pp_if.if_xname, sp->pp_auth_failures); 2583 if_down(&sp->pp_if); 2584 return; 2585 } 2586 2587 sp->pp_phase = SPPP_PHASE_ESTABLISH; 2588 2589 if(debug) 2590 { 2591 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2592 sppp_phase_name(sp->pp_phase)); 2593 } 2594 2595 /* Notify lower layer if desired. */ 2596 if (sp->pp_tls) 2597 (sp->pp_tls)(sp); 2598 } 2599 2600 static void 2601 sppp_lcp_tlf(struct sppp *sp) 2602 { 2603 STDDCL; 2604 2605 sp->pp_phase = SPPP_PHASE_DEAD; 2606 2607 if(debug) 2608 { 2609 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2610 sppp_phase_name(sp->pp_phase)); 2611 } 2612 2613 /* Notify lower layer if desired. */ 2614 if (sp->pp_tlf) 2615 (sp->pp_tlf)(sp); 2616 } 2617 2618 static void 2619 sppp_lcp_scr(struct sppp *sp) 2620 { 2621 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2622 int i = 0; 2623 u_short authproto; 2624 2625 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2626 if (! sp->lcp.magic) 2627 sp->lcp.magic = random(); 2628 opt[i++] = LCP_OPT_MAGIC; 2629 opt[i++] = 6; 2630 opt[i++] = sp->lcp.magic >> 24; 2631 opt[i++] = sp->lcp.magic >> 16; 2632 opt[i++] = sp->lcp.magic >> 8; 2633 opt[i++] = sp->lcp.magic; 2634 } 2635 2636 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2637 opt[i++] = LCP_OPT_MRU; 2638 opt[i++] = 4; 2639 opt[i++] = sp->lcp.mru >> 8; 2640 opt[i++] = sp->lcp.mru; 2641 } 2642 2643 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2644 authproto = sp->hisauth.proto; 2645 opt[i++] = LCP_OPT_AUTH_PROTO; 2646 opt[i++] = authproto == PPP_CHAP? 5: 4; 2647 opt[i++] = authproto >> 8; 2648 opt[i++] = authproto; 2649 if (authproto == PPP_CHAP) 2650 opt[i++] = CHAP_MD5; 2651 } 2652 2653 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2654 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2655 } 2656 2657 /* 2658 * Check the open NCPs, return true if at least one NCP is open. 2659 */ 2660 static int 2661 sppp_ncp_check(struct sppp *sp) 2662 { 2663 int i, mask; 2664 2665 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2666 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2667 return 1; 2668 return 0; 2669 } 2670 2671 /* 2672 * Re-check the open NCPs and see if we should terminate the link. 2673 * Called by the NCPs during their tlf action handling. 2674 */ 2675 static void 2676 sppp_lcp_check_and_close(struct sppp *sp) 2677 { 2678 2679 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2680 /* don't bother, we are already going down */ 2681 return; 2682 2683 if (sppp_ncp_check(sp)) 2684 return; 2685 2686 lcp.Close(sp); 2687 } 2688 2689 2690 /* 2691 *--------------------------------------------------------------------------* 2692 * * 2693 * The IPCP implementation. * 2694 * * 2695 *--------------------------------------------------------------------------* 2696 */ 2697 2698 static void 2699 sppp_ipcp_init(struct sppp *sp) 2700 { 2701 sp->ipcp.opts = 0; 2702 sp->ipcp.flags = 0; 2703 sp->state[IDX_IPCP] = STATE_INITIAL; 2704 sp->fail_counter[IDX_IPCP] = 0; 2705 sp->pp_seq[IDX_IPCP] = 0; 2706 sp->pp_rseq[IDX_IPCP] = 0; 2707 callout_init(&sp->ch[IDX_IPCP]); 2708 } 2709 2710 static void 2711 sppp_ipcp_up(struct sppp *sp) 2712 { 2713 sppp_up_event(&ipcp, sp); 2714 } 2715 2716 static void 2717 sppp_ipcp_down(struct sppp *sp) 2718 { 2719 sppp_down_event(&ipcp, sp); 2720 } 2721 2722 static void 2723 sppp_ipcp_open(struct sppp *sp) 2724 { 2725 STDDCL; 2726 u_int32_t myaddr, hisaddr; 2727 2728 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 2729 sp->ipcp.req_myaddr = 0; 2730 sp->ipcp.req_hisaddr = 0; 2731 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 2732 2733 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 2734 /* 2735 * If we don't have his address, this probably means our 2736 * interface doesn't want to talk IP at all. (This could 2737 * be the case if somebody wants to speak only IPX, for 2738 * example.) Don't open IPCP in this case. 2739 */ 2740 if (hisaddr == 0L) { 2741 /* XXX this message should go away */ 2742 if (debug) 2743 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n", 2744 SPP_ARGS(ifp)); 2745 return; 2746 } 2747 2748 if (myaddr == 0) { 2749 /* 2750 * I don't have an assigned address, so i need to 2751 * negotiate my address. 2752 */ 2753 sp->ipcp.flags |= IPCP_MYADDR_DYN; 2754 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2755 } 2756 if (hisaddr == 1) { 2757 /* 2758 * XXX - remove this hack! 2759 * remote has no valid adress, we need to get one assigned. 2760 */ 2761 sp->ipcp.flags |= IPCP_HISADDR_DYN; 2762 } 2763 sppp_open_event(&ipcp, sp); 2764 } 2765 2766 static void 2767 sppp_ipcp_close(struct sppp *sp) 2768 { 2769 sppp_close_event(&ipcp, sp); 2770 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 2771 /* 2772 * Some address was dynamic, clear it again. 2773 */ 2774 sppp_clear_ip_addrs(sp); 2775 } 2776 2777 static void 2778 sppp_ipcp_TO(void *cookie) 2779 { 2780 sppp_to_event(&ipcp, (struct sppp *)cookie); 2781 } 2782 2783 /* 2784 * Analyze a configure request. Return true if it was agreeable, and 2785 * caused action sca, false if it has been rejected or nak'ed, and 2786 * caused action scn. (The return value is used to make the state 2787 * transition decision in the state automaton.) 2788 */ 2789 static int 2790 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2791 { 2792 u_char *buf, *r, *p; 2793 struct ifnet *ifp = &sp->pp_if; 2794 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 2795 u_int32_t hisaddr, desiredaddr; 2796 2797 len -= 4; 2798 origlen = len; 2799 /* 2800 * Make sure to allocate a buf that can at least hold a 2801 * conf-nak with an `address' option. We might need it below. 2802 */ 2803 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 2804 if (! buf) 2805 return (0); 2806 2807 /* pass 1: see if we can recognize them */ 2808 if (debug) 2809 log(LOG_DEBUG, SPP_FMT "ipcp parse opts:", 2810 SPP_ARGS(ifp)); 2811 p = (void*) (h+1); 2812 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2813 if (debug) 2814 addlog(" %s", sppp_ipcp_opt_name(*p)); 2815 switch (*p) { 2816 #ifdef notyet 2817 case IPCP_OPT_COMPRESSION: 2818 if (len >= 6 && p[1] >= 6) { 2819 /* correctly formed compress option */ 2820 continue; 2821 } 2822 if (debug) 2823 addlog(" [invalid]"); 2824 break; 2825 #endif 2826 case IPCP_OPT_ADDRESS: 2827 if (len >= 6 && p[1] == 6) { 2828 /* correctly formed address option */ 2829 continue; 2830 } 2831 if (debug) 2832 addlog(" [invalid]"); 2833 break; 2834 default: 2835 /* Others not supported. */ 2836 if (debug) 2837 addlog(" [rej]"); 2838 break; 2839 } 2840 /* Add the option to rejected list. */ 2841 bcopy (p, r, p[1]); 2842 r += p[1]; 2843 rlen += p[1]; 2844 } 2845 if (rlen) { 2846 if (debug) 2847 addlog(" send conf-rej\n"); 2848 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 2849 goto end; 2850 } else if (debug) 2851 addlog("\n"); 2852 2853 /* pass 2: parse option values */ 2854 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 2855 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 2856 else 2857 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 2858 if (debug) 2859 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ", 2860 SPP_ARGS(ifp)); 2861 p = (void*) (h+1); 2862 len = origlen; 2863 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2864 if (debug) 2865 addlog(" %s", sppp_ipcp_opt_name(*p)); 2866 switch (*p) { 2867 #ifdef notyet 2868 case IPCP_OPT_COMPRESSION: 2869 continue; 2870 #endif 2871 case IPCP_OPT_ADDRESS: 2872 desiredaddr = p[2] << 24 | p[3] << 16 | 2873 p[4] << 8 | p[5]; 2874 if (desiredaddr == hisaddr || 2875 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 2876 /* 2877 * Peer's address is same as our value, 2878 * this is agreeable. Gonna conf-ack 2879 * it. 2880 */ 2881 if (debug) 2882 addlog(" %s [ack]", 2883 sppp_dotted_quad(hisaddr)); 2884 /* record that we've seen it already */ 2885 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 2886 sp->ipcp.req_hisaddr = desiredaddr; 2887 hisaddr = desiredaddr; 2888 continue; 2889 } 2890 /* 2891 * The address wasn't agreeable. This is either 2892 * he sent us 0.0.0.0, asking to assign him an 2893 * address, or he send us another address not 2894 * matching our value. Either case, we gonna 2895 * conf-nak it with our value. 2896 */ 2897 if (debug) { 2898 if (desiredaddr == 0) 2899 addlog(" [addr requested]"); 2900 else 2901 addlog(" %s [not agreed]", 2902 sppp_dotted_quad(desiredaddr)); 2903 } 2904 2905 p[2] = hisaddr >> 24; 2906 p[3] = hisaddr >> 16; 2907 p[4] = hisaddr >> 8; 2908 p[5] = hisaddr; 2909 break; 2910 } 2911 /* Add the option to nak'ed list. */ 2912 bcopy (p, r, p[1]); 2913 r += p[1]; 2914 rlen += p[1]; 2915 } 2916 2917 /* 2918 * If we are about to conf-ack the request, but haven't seen 2919 * his address so far, gonna conf-nak it instead, with the 2920 * `address' option present and our idea of his address being 2921 * filled in there, to request negotiation of both addresses. 2922 * 2923 * XXX This can result in an endless req - nak loop if peer 2924 * doesn't want to send us his address. Q: What should we do 2925 * about it? XXX A: implement the max-failure counter. 2926 */ 2927 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 2928 buf[0] = IPCP_OPT_ADDRESS; 2929 buf[1] = 6; 2930 buf[2] = hisaddr >> 24; 2931 buf[3] = hisaddr >> 16; 2932 buf[4] = hisaddr >> 8; 2933 buf[5] = hisaddr; 2934 rlen = 6; 2935 if (debug) 2936 addlog(" still need hisaddr"); 2937 } 2938 2939 if (rlen) { 2940 if (debug) 2941 addlog(" send conf-nak\n"); 2942 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 2943 } else { 2944 if (debug) 2945 addlog(" send conf-ack\n"); 2946 sppp_cp_send (sp, PPP_IPCP, CONF_ACK, 2947 h->ident, origlen, h+1); 2948 } 2949 2950 end: 2951 free (buf, M_TEMP); 2952 return (rlen == 0); 2953 } 2954 2955 /* 2956 * Analyze the IPCP Configure-Reject option list, and adjust our 2957 * negotiation. 2958 */ 2959 static void 2960 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2961 { 2962 u_char *buf, *p; 2963 struct ifnet *ifp = &sp->pp_if; 2964 int debug = ifp->if_flags & IFF_DEBUG; 2965 2966 len -= 4; 2967 buf = malloc (len, M_TEMP, M_NOWAIT); 2968 if (!buf) 2969 return; 2970 2971 if (debug) 2972 log(LOG_DEBUG, SPP_FMT "ipcp rej opts:", 2973 SPP_ARGS(ifp)); 2974 2975 p = (void*) (h+1); 2976 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2977 if (debug) 2978 addlog(" %s", sppp_ipcp_opt_name(*p)); 2979 switch (*p) { 2980 case IPCP_OPT_ADDRESS: 2981 /* 2982 * Peer doesn't grok address option. This is 2983 * bad. XXX Should we better give up here? 2984 */ 2985 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 2986 break; 2987 #ifdef notyet 2988 case IPCP_OPT_COMPRESS: 2989 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 2990 break; 2991 #endif 2992 } 2993 } 2994 if (debug) 2995 addlog("\n"); 2996 free (buf, M_TEMP); 2997 return; 2998 } 2999 3000 /* 3001 * Analyze the IPCP Configure-NAK option list, and adjust our 3002 * negotiation. 3003 */ 3004 static void 3005 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3006 { 3007 u_char *p; 3008 struct ifnet *ifp = &sp->pp_if; 3009 int debug = ifp->if_flags & IFF_DEBUG; 3010 u_int32_t wantaddr; 3011 3012 len -= 4; 3013 3014 if (debug) 3015 log(LOG_DEBUG, SPP_FMT "ipcp nak opts:", 3016 SPP_ARGS(ifp)); 3017 3018 p = (void*) (h+1); 3019 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3020 if (debug) 3021 addlog(" %s", sppp_ipcp_opt_name(*p)); 3022 switch (*p) { 3023 case IPCP_OPT_ADDRESS: 3024 /* 3025 * Peer doesn't like our local IP address. See 3026 * if we can do something for him. We'll drop 3027 * him our address then. 3028 */ 3029 if (len >= 6 && p[1] == 6) { 3030 wantaddr = p[2] << 24 | p[3] << 16 | 3031 p[4] << 8 | p[5]; 3032 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3033 if (debug) 3034 addlog(" [wantaddr %s]", 3035 sppp_dotted_quad(wantaddr)); 3036 /* 3037 * When doing dynamic address assignment, 3038 * we accept his offer. Otherwise, we 3039 * ignore it and thus continue to negotiate 3040 * our already existing value. 3041 */ 3042 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3043 if (debug) 3044 addlog(" [agree]"); 3045 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3046 sp->ipcp.req_myaddr = wantaddr; 3047 } 3048 } 3049 break; 3050 3051 case IPCP_OPT_PRIMDNS: 3052 if (len >= 6 && p[1] == 6) { 3053 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3054 p[4] << 8 | p[5]; 3055 } 3056 break; 3057 3058 case IPCP_OPT_SECDNS: 3059 if (len >= 6 && p[1] == 6) { 3060 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3061 p[4] << 8 | p[5]; 3062 } 3063 break; 3064 #ifdef notyet 3065 case IPCP_OPT_COMPRESS: 3066 /* 3067 * Peer wants different compression parameters. 3068 */ 3069 break; 3070 #endif 3071 } 3072 } 3073 if (debug) 3074 addlog("\n"); 3075 return; 3076 } 3077 3078 static void 3079 sppp_ipcp_tlu(struct sppp *sp) 3080 { 3081 /* we are up. Set addresses and notify anyone interested */ 3082 u_int32_t myaddr, hisaddr; 3083 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3084 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 3085 myaddr = sp->ipcp.req_myaddr; 3086 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 3087 hisaddr = sp->ipcp.req_hisaddr; 3088 sppp_set_ip_addrs(sp, myaddr, hisaddr); 3089 if (sp->pp_con) 3090 sp->pp_con(sp); 3091 } 3092 3093 static void 3094 sppp_ipcp_tld(struct sppp *sp) 3095 { 3096 } 3097 3098 static void 3099 sppp_ipcp_tls(struct sppp *sp) 3100 { 3101 /* indicate to LCP that it must stay alive */ 3102 sp->lcp.protos |= (1 << IDX_IPCP); 3103 } 3104 3105 static void 3106 sppp_ipcp_tlf(struct sppp *sp) 3107 { 3108 /* we no longer need LCP */ 3109 sp->lcp.protos &= ~(1 << IDX_IPCP); 3110 } 3111 3112 static void 3113 sppp_ipcp_scr(struct sppp *sp) 3114 { 3115 char opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3116 u_int32_t ouraddr; 3117 int i = 0; 3118 3119 #ifdef notyet 3120 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3121 opt[i++] = IPCP_OPT_COMPRESSION; 3122 opt[i++] = 6; 3123 opt[i++] = 0; /* VJ header compression */ 3124 opt[i++] = 0x2d; /* VJ header compression */ 3125 opt[i++] = max_slot_id; 3126 opt[i++] = comp_slot_id; 3127 } 3128 #endif 3129 3130 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3131 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3132 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3133 else 3134 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3135 opt[i++] = IPCP_OPT_ADDRESS; 3136 opt[i++] = 6; 3137 opt[i++] = ouraddr >> 24; 3138 opt[i++] = ouraddr >> 16; 3139 opt[i++] = ouraddr >> 8; 3140 opt[i++] = ouraddr; 3141 } 3142 3143 if (sp->query_dns & 1) { 3144 opt[i++] = IPCP_OPT_PRIMDNS; 3145 opt[i++] = 6; 3146 opt[i++] = sp->dns_addrs[0] >> 24; 3147 opt[i++] = sp->dns_addrs[0] >> 16; 3148 opt[i++] = sp->dns_addrs[0] >> 8; 3149 opt[i++] = sp->dns_addrs[0]; 3150 } 3151 if (sp->query_dns & 2) { 3152 opt[i++] = IPCP_OPT_SECDNS; 3153 opt[i++] = 6; 3154 opt[i++] = sp->dns_addrs[1] >> 24; 3155 opt[i++] = sp->dns_addrs[1] >> 16; 3156 opt[i++] = sp->dns_addrs[1] >> 8; 3157 opt[i++] = sp->dns_addrs[1]; 3158 } 3159 3160 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3161 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3162 } 3163 3164 3165 /* 3166 *--------------------------------------------------------------------------* 3167 * * 3168 * The IPv6CP implementation. * 3169 * * 3170 *--------------------------------------------------------------------------* 3171 */ 3172 3173 #ifdef INET6 3174 static void 3175 sppp_ipv6cp_init(struct sppp *sp) 3176 { 3177 sp->ipv6cp.opts = 0; 3178 sp->ipv6cp.flags = 0; 3179 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3180 sp->fail_counter[IDX_IPV6CP] = 0; 3181 sp->pp_seq[IDX_IPV6CP] = 0; 3182 sp->pp_rseq[IDX_IPV6CP] = 0; 3183 callout_init(&sp->ch[IDX_IPV6CP]); 3184 } 3185 3186 static void 3187 sppp_ipv6cp_up(struct sppp *sp) 3188 { 3189 sppp_up_event(&ipv6cp, sp); 3190 } 3191 3192 static void 3193 sppp_ipv6cp_down(struct sppp *sp) 3194 { 3195 sppp_down_event(&ipv6cp, sp); 3196 } 3197 3198 static void 3199 sppp_ipv6cp_open(struct sppp *sp) 3200 { 3201 STDDCL; 3202 struct in6_addr myaddr, hisaddr; 3203 3204 #ifdef IPV6CP_MYIFID_DYN 3205 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3206 #else 3207 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3208 #endif 3209 3210 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3211 /* 3212 * If we don't have our address, this probably means our 3213 * interface doesn't want to talk IPv6 at all. (This could 3214 * be the case if somebody wants to speak only IPX, for 3215 * example.) Don't open IPv6CP in this case. 3216 */ 3217 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3218 /* XXX this message should go away */ 3219 if (debug) 3220 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n", 3221 SPP_ARGS(ifp)); 3222 return; 3223 } 3224 3225 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3226 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3227 sppp_open_event(&ipv6cp, sp); 3228 } 3229 3230 static void 3231 sppp_ipv6cp_close(struct sppp *sp) 3232 { 3233 sppp_close_event(&ipv6cp, sp); 3234 } 3235 3236 static void 3237 sppp_ipv6cp_TO(void *cookie) 3238 { 3239 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3240 } 3241 3242 /* 3243 * Analyze a configure request. Return true if it was agreeable, and 3244 * caused action sca, false if it has been rejected or nak'ed, and 3245 * caused action scn. (The return value is used to make the state 3246 * transition decision in the state automaton.) 3247 */ 3248 static int 3249 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3250 { 3251 u_char *buf, *r, *p; 3252 struct ifnet *ifp = &sp->pp_if; 3253 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3254 struct in6_addr myaddr, desiredaddr, suggestaddr; 3255 int ifidcount; 3256 int type; 3257 int collision, nohisaddr; 3258 3259 len -= 4; 3260 origlen = len; 3261 /* 3262 * Make sure to allocate a buf that can at least hold a 3263 * conf-nak with an `address' option. We might need it below. 3264 */ 3265 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 3266 if (! buf) 3267 return (0); 3268 3269 /* pass 1: see if we can recognize them */ 3270 if (debug) 3271 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:", 3272 SPP_ARGS(ifp)); 3273 p = (void*) (h+1); 3274 ifidcount = 0; 3275 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3276 if (debug) 3277 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3278 switch (*p) { 3279 case IPV6CP_OPT_IFID: 3280 if (len >= 10 && p[1] == 10 && ifidcount == 0) { 3281 /* correctly formed address option */ 3282 ifidcount++; 3283 continue; 3284 } 3285 if (debug) 3286 addlog(" [invalid]"); 3287 break; 3288 #ifdef notyet 3289 case IPV6CP_OPT_COMPRESSION: 3290 if (len >= 4 && p[1] >= 4) { 3291 /* correctly formed compress option */ 3292 continue; 3293 } 3294 if (debug) 3295 addlog(" [invalid]"); 3296 break; 3297 #endif 3298 default: 3299 /* Others not supported. */ 3300 if (debug) 3301 addlog(" [rej]"); 3302 break; 3303 } 3304 /* Add the option to rejected list. */ 3305 bcopy (p, r, p[1]); 3306 r += p[1]; 3307 rlen += p[1]; 3308 } 3309 if (rlen) { 3310 if (debug) 3311 addlog(" send conf-rej\n"); 3312 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3313 goto end; 3314 } else if (debug) 3315 addlog("\n"); 3316 3317 /* pass 2: parse option values */ 3318 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3319 if (debug) 3320 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ", 3321 SPP_ARGS(ifp)); 3322 p = (void*) (h+1); 3323 len = origlen; 3324 type = CONF_ACK; 3325 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3326 if (debug) 3327 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3328 switch (*p) { 3329 #ifdef notyet 3330 case IPV6CP_OPT_COMPRESSION: 3331 continue; 3332 #endif 3333 case IPV6CP_OPT_IFID: 3334 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3335 bcopy(&p[2], &desiredaddr.s6_addr[8], 8); 3336 collision = (memcmp(&desiredaddr.s6_addr[8], 3337 &myaddr.s6_addr[8], 8) == 0); 3338 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3339 3340 desiredaddr.s6_addr16[0] = htons(0xfe80); 3341 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3342 3343 if (!collision && !nohisaddr) { 3344 /* no collision, hisaddr known - Conf-Ack */ 3345 type = CONF_ACK; 3346 3347 if (debug) { 3348 addlog(" %s [%s]", 3349 ip6_sprintf(&desiredaddr), 3350 sppp_cp_type_name(type)); 3351 } 3352 continue; 3353 } 3354 3355 memset(&suggestaddr, 0, sizeof(&suggestaddr)); 3356 if (collision && nohisaddr) { 3357 /* collision, hisaddr unknown - Conf-Rej */ 3358 type = CONF_REJ; 3359 memset(&p[2], 0, 8); 3360 } else { 3361 /* 3362 * - no collision, hisaddr unknown, or 3363 * - collision, hisaddr known 3364 * Conf-Nak, suggest hisaddr 3365 */ 3366 type = CONF_NAK; 3367 sppp_suggest_ip6_addr(sp, &suggestaddr); 3368 bcopy(&suggestaddr.s6_addr[8], &p[2], 8); 3369 } 3370 if (debug) 3371 addlog(" %s [%s]", ip6_sprintf(&desiredaddr), 3372 sppp_cp_type_name(type)); 3373 break; 3374 } 3375 /* Add the option to nak'ed list. */ 3376 bcopy (p, r, p[1]); 3377 r += p[1]; 3378 rlen += p[1]; 3379 } 3380 3381 if (rlen == 0 && type == CONF_ACK) { 3382 if (debug) 3383 addlog(" send %s\n", sppp_cp_type_name(type)); 3384 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1); 3385 } else { 3386 #ifdef DIAGNOSTIC 3387 if (type == CONF_ACK) 3388 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3389 #endif 3390 3391 if (debug) { 3392 addlog(" send %s suggest %s\n", 3393 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); 3394 } 3395 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3396 } 3397 3398 end: 3399 free (buf, M_TEMP); 3400 return (rlen == 0); 3401 } 3402 3403 /* 3404 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3405 * negotiation. 3406 */ 3407 static void 3408 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3409 { 3410 u_char *buf, *p; 3411 struct ifnet *ifp = &sp->pp_if; 3412 int debug = ifp->if_flags & IFF_DEBUG; 3413 3414 len -= 4; 3415 buf = malloc (len, M_TEMP, M_NOWAIT); 3416 if (!buf) 3417 return; 3418 3419 if (debug) 3420 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:", 3421 SPP_ARGS(ifp)); 3422 3423 p = (void*) (h+1); 3424 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3425 if (debug) 3426 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3427 switch (*p) { 3428 case IPV6CP_OPT_IFID: 3429 /* 3430 * Peer doesn't grok address option. This is 3431 * bad. XXX Should we better give up here? 3432 */ 3433 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3434 break; 3435 #ifdef notyet 3436 case IPV6CP_OPT_COMPRESS: 3437 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3438 break; 3439 #endif 3440 } 3441 } 3442 if (debug) 3443 addlog("\n"); 3444 free (buf, M_TEMP); 3445 return; 3446 } 3447 3448 /* 3449 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3450 * negotiation. 3451 */ 3452 static void 3453 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3454 { 3455 u_char *buf, *p; 3456 struct ifnet *ifp = &sp->pp_if; 3457 int debug = ifp->if_flags & IFF_DEBUG; 3458 struct in6_addr suggestaddr; 3459 3460 len -= 4; 3461 buf = malloc (len, M_TEMP, M_NOWAIT); 3462 if (!buf) 3463 return; 3464 3465 if (debug) 3466 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:", 3467 SPP_ARGS(ifp)); 3468 3469 p = (void*) (h+1); 3470 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3471 if (debug) 3472 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3473 switch (*p) { 3474 case IPV6CP_OPT_IFID: 3475 /* 3476 * Peer doesn't like our local ifid. See 3477 * if we can do something for him. We'll drop 3478 * him our address then. 3479 */ 3480 if (len < 10 || p[1] != 10) 3481 break; 3482 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3483 suggestaddr.s6_addr16[0] = htons(0xfe80); 3484 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3485 bcopy(&p[2], &suggestaddr.s6_addr[8], 8); 3486 3487 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3488 if (debug) 3489 addlog(" [suggestaddr %s]", 3490 ip6_sprintf(&suggestaddr)); 3491 #ifdef IPV6CP_MYIFID_DYN 3492 /* 3493 * When doing dynamic address assignment, 3494 * we accept his offer. 3495 */ 3496 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3497 struct in6_addr lastsuggest; 3498 /* 3499 * If <suggested myaddr from peer> equals to 3500 * <hisaddr we have suggested last time>, 3501 * we have a collision. generate new random 3502 * ifid. 3503 */ 3504 sppp_suggest_ip6_addr(&lastsuggest); 3505 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3506 lastsuggest)) { 3507 if (debug) 3508 addlog(" [random]"); 3509 sppp_gen_ip6_addr(sp, &suggestaddr); 3510 } 3511 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3512 if (debug) 3513 addlog(" [agree]"); 3514 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3515 } 3516 #else 3517 /* 3518 * Since we do not do dynamic address assignment, 3519 * we ignore it and thus continue to negotiate 3520 * our already existing value. This can possibly 3521 * go into infinite request-reject loop. 3522 * 3523 * This is not likely because we normally use 3524 * ifid based on MAC-address. 3525 * If you have no ethernet card on the node, too bad. 3526 * XXX should we use fail_counter? 3527 */ 3528 #endif 3529 break; 3530 #ifdef notyet 3531 case IPV6CP_OPT_COMPRESS: 3532 /* 3533 * Peer wants different compression parameters. 3534 */ 3535 break; 3536 #endif 3537 } 3538 } 3539 if (debug) 3540 addlog("\n"); 3541 free (buf, M_TEMP); 3542 return; 3543 } 3544 3545 static void 3546 sppp_ipv6cp_tlu(struct sppp *sp) 3547 { 3548 /* we are up - notify isdn daemon */ 3549 if (sp->pp_con) 3550 sp->pp_con(sp); 3551 } 3552 3553 static void 3554 sppp_ipv6cp_tld(struct sppp *sp) 3555 { 3556 } 3557 3558 static void 3559 sppp_ipv6cp_tls(struct sppp *sp) 3560 { 3561 /* indicate to LCP that it must stay alive */ 3562 sp->lcp.protos |= (1 << IDX_IPV6CP); 3563 } 3564 3565 static void 3566 sppp_ipv6cp_tlf(struct sppp *sp) 3567 { 3568 /* we no longer need LCP */ 3569 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3570 } 3571 3572 static void 3573 sppp_ipv6cp_scr(struct sppp *sp) 3574 { 3575 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3576 struct in6_addr ouraddr; 3577 int i = 0; 3578 3579 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3580 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3581 opt[i++] = IPV6CP_OPT_IFID; 3582 opt[i++] = 10; 3583 bcopy(&ouraddr.s6_addr[8], &opt[i], 8); 3584 i += 8; 3585 } 3586 3587 #ifdef notyet 3588 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3589 opt[i++] = IPV6CP_OPT_COMPRESSION; 3590 opt[i++] = 4; 3591 opt[i++] = 0; /* TBD */ 3592 opt[i++] = 0; /* TBD */ 3593 /* variable length data may follow */ 3594 } 3595 #endif 3596 3597 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3598 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 3599 } 3600 #else /*INET6*/ 3601 static void sppp_ipv6cp_init(struct sppp *sp) 3602 { 3603 } 3604 3605 static void sppp_ipv6cp_up(struct sppp *sp) 3606 { 3607 } 3608 3609 static void sppp_ipv6cp_down(struct sppp *sp) 3610 { 3611 } 3612 3613 3614 static void sppp_ipv6cp_open(struct sppp *sp) 3615 { 3616 } 3617 3618 static void sppp_ipv6cp_close(struct sppp *sp) 3619 { 3620 } 3621 3622 static void sppp_ipv6cp_TO(void *sp) 3623 { 3624 } 3625 3626 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3627 { 3628 return 0; 3629 } 3630 3631 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3632 { 3633 } 3634 3635 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3636 { 3637 } 3638 3639 static void sppp_ipv6cp_tlu(struct sppp *sp) 3640 { 3641 } 3642 3643 static void sppp_ipv6cp_tld(struct sppp *sp) 3644 { 3645 } 3646 3647 static void sppp_ipv6cp_tls(struct sppp *sp) 3648 { 3649 } 3650 3651 static void sppp_ipv6cp_tlf(struct sppp *sp) 3652 { 3653 } 3654 3655 static void sppp_ipv6cp_scr(struct sppp *sp) 3656 { 3657 } 3658 #endif /*INET6*/ 3659 3660 3661 /* 3662 *--------------------------------------------------------------------------* 3663 * * 3664 * The CHAP implementation. * 3665 * * 3666 *--------------------------------------------------------------------------* 3667 */ 3668 3669 /* 3670 * The authentication protocols don't employ a full-fledged state machine as 3671 * the control protocols do, since they do have Open and Close events, but 3672 * not Up and Down, nor are they explicitly terminated. Also, use of the 3673 * authentication protocols may be different in both directions (this makes 3674 * sense, think of a machine that never accepts incoming calls but only 3675 * calls out, it doesn't require the called party to authenticate itself). 3676 * 3677 * Our state machine for the local authentication protocol (we are requesting 3678 * the peer to authenticate) looks like: 3679 * 3680 * RCA- 3681 * +--------------------------------------------+ 3682 * V scn,tld| 3683 * +--------+ Close +---------+ RCA+ 3684 * | |<----------------------------------| |------+ 3685 * +--->| Closed | TO* | Opened | sca | 3686 * | | |-----+ +-------| |<-----+ 3687 * | +--------+ irc | | +---------+ 3688 * | ^ | | ^ 3689 * | | | | | 3690 * | | | | | 3691 * | TO-| | | | 3692 * | |tld TO+ V | | 3693 * | | +------->+ | | 3694 * | | | | | | 3695 * | +--------+ V | | 3696 * | | |<----+<--------------------+ | 3697 * | | Req- | scr | 3698 * | | Sent | | 3699 * | | | | 3700 * | +--------+ | 3701 * | RCA- | | RCA+ | 3702 * +------+ +------------------------------------------+ 3703 * scn,tld sca,irc,ict,tlu 3704 * 3705 * 3706 * with: 3707 * 3708 * Open: LCP reached authentication phase 3709 * Close: LCP reached terminate phase 3710 * 3711 * RCA+: received reply (pap-req, chap-response), acceptable 3712 * RCN: received reply (pap-req, chap-response), not acceptable 3713 * TO+: timeout with restart counter >= 0 3714 * TO-: timeout with restart counter < 0 3715 * TO*: reschedule timeout for CHAP 3716 * 3717 * scr: send request packet (none for PAP, chap-challenge) 3718 * sca: send ack packet (pap-ack, chap-success) 3719 * scn: send nak packet (pap-nak, chap-failure) 3720 * ict: initialize re-challenge timer (CHAP only) 3721 * 3722 * tlu: this-layer-up, LCP reaches network phase 3723 * tld: this-layer-down, LCP enters terminate phase 3724 * 3725 * Note that in CHAP mode, after sending a new challenge, while the state 3726 * automaton falls back into Req-Sent state, it doesn't signal a tld 3727 * event to LCP, so LCP remains in network phase. Only after not getting 3728 * any response (or after getting an unacceptable response), CHAP closes, 3729 * causing LCP to enter terminate phase. 3730 * 3731 * With PAP, there is no initial request that can be sent. The peer is 3732 * expected to send one based on the successful negotiation of PAP as 3733 * the authentication protocol during the LCP option negotiation. 3734 * 3735 * Incoming authentication protocol requests (remote requests 3736 * authentication, we are peer) don't employ a state machine at all, 3737 * they are simply answered. Some peers [Ascend P50 firmware rev 3738 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 3739 * still in authentication phase (thereby violating the standard that 3740 * demands that these NCP packets are to be discarded), so we keep 3741 * track of the peer demanding us to authenticate, and only proceed to 3742 * phase network once we've seen a positive acknowledge for the 3743 * authentication. 3744 */ 3745 3746 /* 3747 * Handle incoming CHAP packets. 3748 */ 3749 void 3750 sppp_chap_input(struct sppp *sp, struct mbuf *m) 3751 { 3752 STDDCL; 3753 struct lcp_header *h; 3754 int len, x; 3755 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 3756 int value_len, name_len; 3757 MD5_CTX ctx; 3758 3759 len = m->m_pkthdr.len; 3760 if (len < 4) { 3761 if (debug) 3762 log(LOG_DEBUG, 3763 SPP_FMT "chap invalid packet length: %d bytes\n", 3764 SPP_ARGS(ifp), len); 3765 return; 3766 } 3767 h = mtod (m, struct lcp_header*); 3768 if (len > ntohs (h->len)) 3769 len = ntohs (h->len); 3770 3771 switch (h->type) { 3772 /* challenge, failure and success are his authproto */ 3773 case CHAP_CHALLENGE: 3774 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 3775 /* can't do anything usefull */ 3776 sp->pp_auth_failures++; 3777 printf(SPP_FMT "chap input without my name and my secret being set\n", 3778 SPP_ARGS(ifp)); 3779 break; 3780 } 3781 value = 1 + (u_char*)(h+1); 3782 value_len = value[-1]; 3783 name = value + value_len; 3784 name_len = len - value_len - 5; 3785 if (name_len < 0) { 3786 if (debug) { 3787 log(LOG_DEBUG, 3788 SPP_FMT "chap corrupted challenge " 3789 "<%s id=0x%x len=%d", 3790 SPP_ARGS(ifp), 3791 sppp_auth_type_name(PPP_CHAP, h->type), 3792 h->ident, ntohs(h->len)); 3793 if (len > 4) 3794 sppp_print_bytes((u_char*) (h+1), len-4); 3795 addlog(">\n"); 3796 } 3797 break; 3798 } 3799 3800 if (debug) { 3801 log(LOG_DEBUG, 3802 SPP_FMT "chap input <%s id=0x%x len=%d name=", 3803 SPP_ARGS(ifp), 3804 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 3805 ntohs(h->len)); 3806 sppp_print_string((char*) name, name_len); 3807 addlog(" value-size=%d value=", value_len); 3808 sppp_print_bytes(value, value_len); 3809 addlog(">\n"); 3810 } 3811 3812 /* Compute reply value. */ 3813 MD5Init(&ctx); 3814 MD5Update(&ctx, &h->ident, 1); 3815 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 3816 MD5Update(&ctx, value, value_len); 3817 MD5Final(digest, &ctx); 3818 dsize = sizeof digest; 3819 3820 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 3821 sizeof dsize, (const char *)&dsize, 3822 sizeof digest, digest, 3823 sp->myauth.name_len, 3824 sp->myauth.name, 3825 0); 3826 break; 3827 3828 case CHAP_SUCCESS: 3829 if (debug) { 3830 log(LOG_DEBUG, SPP_FMT "chap success", 3831 SPP_ARGS(ifp)); 3832 if (len > 4) { 3833 addlog(": "); 3834 sppp_print_string((char*)(h + 1), len - 4); 3835 } 3836 addlog("\n"); 3837 } 3838 x = splnet(); 3839 sp->pp_auth_failures = 0; 3840 sp->pp_flags &= ~PP_NEEDAUTH; 3841 if (sp->myauth.proto == PPP_CHAP && 3842 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 3843 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 3844 /* 3845 * We are authenticator for CHAP but didn't 3846 * complete yet. Leave it to tlu to proceed 3847 * to network phase. 3848 */ 3849 splx(x); 3850 break; 3851 } 3852 splx(x); 3853 sppp_phase_network(sp); 3854 break; 3855 3856 case CHAP_FAILURE: 3857 x = splnet(); 3858 sp->pp_auth_failures++; 3859 splx(x); 3860 if (debug) { 3861 log(LOG_INFO, SPP_FMT "chap failure", 3862 SPP_ARGS(ifp)); 3863 if (len > 4) { 3864 addlog(": "); 3865 sppp_print_string((char*)(h + 1), len - 4); 3866 } 3867 addlog("\n"); 3868 } else 3869 log(LOG_INFO, SPP_FMT "chap failure\n", 3870 SPP_ARGS(ifp)); 3871 /* await LCP shutdown by authenticator */ 3872 break; 3873 3874 /* response is my authproto */ 3875 case CHAP_RESPONSE: 3876 if (sp->hisauth.secret == NULL) { 3877 /* can't do anything usefull */ 3878 printf(SPP_FMT "chap input without his secret being set\n", 3879 SPP_ARGS(ifp)); 3880 break; 3881 } 3882 value = 1 + (u_char*)(h+1); 3883 value_len = value[-1]; 3884 name = value + value_len; 3885 name_len = len - value_len - 5; 3886 if (name_len < 0) { 3887 if (debug) { 3888 log(LOG_DEBUG, 3889 SPP_FMT "chap corrupted response " 3890 "<%s id=0x%x len=%d", 3891 SPP_ARGS(ifp), 3892 sppp_auth_type_name(PPP_CHAP, h->type), 3893 h->ident, ntohs(h->len)); 3894 if (len > 4) 3895 sppp_print_bytes((u_char*)(h+1), len-4); 3896 addlog(">\n"); 3897 } 3898 break; 3899 } 3900 if (h->ident != sp->confid[IDX_CHAP]) { 3901 if (debug) 3902 log(LOG_DEBUG, 3903 SPP_FMT "chap dropping response for old ID " 3904 "(got %d, expected %d)\n", 3905 SPP_ARGS(ifp), 3906 h->ident, sp->confid[IDX_CHAP]); 3907 break; 3908 } 3909 if (sp->hisauth.name != NULL && 3910 (name_len != sp->hisauth.name_len 3911 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 3912 log(LOG_INFO, SPP_FMT "chap response, his name ", 3913 SPP_ARGS(ifp)); 3914 sppp_print_string(name, name_len); 3915 addlog(" != expected "); 3916 sppp_print_string(sp->hisauth.name, 3917 sp->hisauth.name_len); 3918 addlog("\n"); 3919 goto chap_failure; 3920 } 3921 if (debug) { 3922 log(LOG_DEBUG, SPP_FMT "chap input(%s) " 3923 "<%s id=0x%x len=%d name=", 3924 SPP_ARGS(ifp), 3925 sppp_state_name(sp->state[IDX_CHAP]), 3926 sppp_auth_type_name(PPP_CHAP, h->type), 3927 h->ident, ntohs (h->len)); 3928 sppp_print_string((char*)name, name_len); 3929 addlog(" value-size=%d value=", value_len); 3930 sppp_print_bytes(value, value_len); 3931 addlog(">\n"); 3932 } 3933 if (value_len != sizeof(sp->myauth.challenge)) { 3934 if (debug) 3935 log(LOG_DEBUG, 3936 SPP_FMT "chap bad hash value length: " 3937 "%d bytes, should be %ld\n", 3938 SPP_ARGS(ifp), value_len, 3939 (long) sizeof(sp->myauth.challenge)); 3940 goto chap_failure; 3941 } 3942 3943 MD5Init(&ctx); 3944 MD5Update(&ctx, &h->ident, 1); 3945 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 3946 MD5Update(&ctx, sp->myauth.challenge, sizeof(sp->myauth.challenge)); 3947 MD5Final(digest, &ctx); 3948 3949 #define FAILMSG "Failed..." 3950 #define SUCCMSG "Welcome!" 3951 3952 if (value_len != sizeof digest || 3953 memcmp(digest, value, value_len) != 0) { 3954 chap_failure: 3955 /* action scn, tld */ 3956 x = splnet(); 3957 sp->pp_auth_failures++; 3958 splx(x); 3959 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 3960 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 3961 0); 3962 chap.tld(sp); 3963 break; 3964 } 3965 sp->pp_auth_failures = 0; 3966 /* action sca, perhaps tlu */ 3967 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 3968 sp->state[IDX_CHAP] == STATE_OPENED) 3969 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 3970 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 3971 0); 3972 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 3973 sppp_cp_change_state(&chap, sp, STATE_OPENED); 3974 chap.tlu(sp); 3975 } 3976 break; 3977 3978 default: 3979 /* Unknown CHAP packet type -- ignore. */ 3980 if (debug) { 3981 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) " 3982 "<0x%x id=0x%xh len=%d", 3983 SPP_ARGS(ifp), 3984 sppp_state_name(sp->state[IDX_CHAP]), 3985 h->type, h->ident, ntohs(h->len)); 3986 if (len > 4) 3987 sppp_print_bytes((u_char*)(h+1), len-4); 3988 addlog(">\n"); 3989 } 3990 break; 3991 3992 } 3993 } 3994 3995 static void 3996 sppp_chap_init(struct sppp *sp) 3997 { 3998 /* Chap doesn't have STATE_INITIAL at all. */ 3999 sp->state[IDX_CHAP] = STATE_CLOSED; 4000 sp->fail_counter[IDX_CHAP] = 0; 4001 sp->pp_seq[IDX_CHAP] = 0; 4002 sp->pp_rseq[IDX_CHAP] = 0; 4003 callout_init(&sp->ch[IDX_CHAP]); 4004 } 4005 4006 static void 4007 sppp_chap_open(struct sppp *sp) 4008 { 4009 if (sp->myauth.proto == PPP_CHAP && 4010 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4011 /* we are authenticator for CHAP, start it */ 4012 chap.scr(sp); 4013 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4014 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4015 } 4016 /* nothing to be done if we are peer, await a challenge */ 4017 } 4018 4019 static void 4020 sppp_chap_close(struct sppp *sp) 4021 { 4022 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4023 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4024 } 4025 4026 static void 4027 sppp_chap_TO(void *cookie) 4028 { 4029 struct sppp *sp = (struct sppp *)cookie; 4030 STDDCL; 4031 int s; 4032 4033 s = splnet(); 4034 if (debug) 4035 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n", 4036 SPP_ARGS(ifp), 4037 sppp_state_name(sp->state[IDX_CHAP]), 4038 sp->rst_counter[IDX_CHAP]); 4039 4040 if (--sp->rst_counter[IDX_CHAP] < 0) 4041 /* TO- event */ 4042 switch (sp->state[IDX_CHAP]) { 4043 case STATE_REQ_SENT: 4044 chap.tld(sp); 4045 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4046 break; 4047 } 4048 else 4049 /* TO+ (or TO*) event */ 4050 switch (sp->state[IDX_CHAP]) { 4051 case STATE_OPENED: 4052 /* TO* event */ 4053 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4054 /* fall through */ 4055 case STATE_REQ_SENT: 4056 chap.scr(sp); 4057 /* sppp_cp_change_state() will restart the timer */ 4058 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4059 break; 4060 } 4061 4062 splx(s); 4063 } 4064 4065 static void 4066 sppp_chap_tlu(struct sppp *sp) 4067 { 4068 STDDCL; 4069 int i, x; 4070 4071 i = 0; 4072 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4073 4074 /* 4075 * Some broken CHAP implementations (Conware CoNet, firmware 4076 * 4.0.?) don't want to re-authenticate their CHAP once the 4077 * initial challenge-response exchange has taken place. 4078 * Provide for an option to avoid rechallenges. 4079 */ 4080 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4081 /* 4082 * Compute the re-challenge timeout. This will yield 4083 * a number between 300 and 810 seconds. 4084 */ 4085 i = 300 + ((unsigned)(random() & 0xff00) >> 7); 4086 4087 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4088 } 4089 4090 if (debug) { 4091 log(LOG_DEBUG, 4092 SPP_FMT "chap %s, ", 4093 SPP_ARGS(ifp), 4094 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4095 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4096 addlog("next re-challenge in %d seconds\n", i); 4097 else 4098 addlog("re-challenging supressed\n"); 4099 } 4100 4101 x = splnet(); 4102 sp->pp_auth_failures = 0; 4103 /* indicate to LCP that we need to be closed down */ 4104 sp->lcp.protos |= (1 << IDX_CHAP); 4105 4106 if (sp->pp_flags & PP_NEEDAUTH) { 4107 /* 4108 * Remote is authenticator, but his auth proto didn't 4109 * complete yet. Defer the transition to network 4110 * phase. 4111 */ 4112 splx(x); 4113 return; 4114 } 4115 splx(x); 4116 4117 /* 4118 * If we are already in phase network, we are done here. This 4119 * is the case if this is a dummy tlu event after a re-challenge. 4120 */ 4121 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4122 sppp_phase_network(sp); 4123 } 4124 4125 static void 4126 sppp_chap_tld(struct sppp *sp) 4127 { 4128 STDDCL; 4129 4130 if (debug) 4131 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp)); 4132 callout_stop(&sp->ch[IDX_CHAP]); 4133 sp->lcp.protos &= ~(1 << IDX_CHAP); 4134 4135 lcp.Close(sp); 4136 } 4137 4138 static void 4139 sppp_chap_scr(struct sppp *sp) 4140 { 4141 struct timeval tv; 4142 u_int32_t *ch, seed; 4143 u_char clen; 4144 4145 if (sp->myauth.name == NULL) { 4146 /* can't do anything usefull */ 4147 printf(SPP_FMT "chap starting without my name being set\n", 4148 SPP_ARGS(&sp->pp_if)); 4149 return; 4150 } 4151 4152 /* Compute random challenge. */ 4153 ch = (u_int32_t *)sp->myauth.challenge; 4154 microtime(&tv); 4155 seed = tv.tv_sec ^ tv.tv_usec; 4156 ch[0] = seed ^ random(); 4157 ch[1] = seed ^ random(); 4158 ch[2] = seed ^ random(); 4159 ch[3] = seed ^ random(); 4160 clen = 16; /* 4 * sizeof(u_int32_t) */ 4161 4162 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4163 4164 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4165 sizeof clen, (const char *)&clen, 4166 sizeof(sp->myauth.challenge), sp->myauth.challenge, 4167 sp->myauth.name_len, 4168 sp->myauth.name, 4169 0); 4170 } 4171 4172 /* 4173 *--------------------------------------------------------------------------* 4174 * * 4175 * The PAP implementation. * 4176 * * 4177 *--------------------------------------------------------------------------* 4178 */ 4179 /* 4180 * For PAP, we need to keep a little state also if we are the peer, not the 4181 * authenticator. This is since we don't get a request to authenticate, but 4182 * have to repeatedly authenticate ourself until we got a response (or the 4183 * retry counter is expired). 4184 */ 4185 4186 /* 4187 * Handle incoming PAP packets. */ 4188 static void 4189 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4190 { 4191 STDDCL; 4192 struct lcp_header *h; 4193 int len, x; 4194 u_char mlen; 4195 char *name, *secret; 4196 int name_len, secret_len; 4197 4198 len = m->m_pkthdr.len; 4199 if (len < 5) { 4200 if (debug) 4201 log(LOG_DEBUG, 4202 SPP_FMT "pap invalid packet length: %d bytes\n", 4203 SPP_ARGS(ifp), len); 4204 return; 4205 } 4206 h = mtod (m, struct lcp_header*); 4207 if (len > ntohs (h->len)) 4208 len = ntohs (h->len); 4209 switch (h->type) { 4210 /* PAP request is my authproto */ 4211 case PAP_REQ: 4212 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4213 /* can't do anything usefull */ 4214 printf(SPP_FMT "pap request without his name and his secret being set\n", 4215 SPP_ARGS(ifp)); 4216 break; 4217 } 4218 name = 1 + (u_char*)(h+1); 4219 name_len = name[-1]; 4220 secret = name + name_len + 1; 4221 if (name_len > len - 6 || 4222 (secret_len = secret[-1]) > len - 6 - name_len) { 4223 if (debug) { 4224 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4225 "<%s id=0x%x len=%d", 4226 SPP_ARGS(ifp), 4227 sppp_auth_type_name(PPP_PAP, h->type), 4228 h->ident, ntohs(h->len)); 4229 if (len > 4) 4230 sppp_print_bytes((u_char*)(h+1), len-4); 4231 addlog(">\n"); 4232 } 4233 break; 4234 } 4235 if (debug) { 4236 log(LOG_DEBUG, SPP_FMT "pap input(%s) " 4237 "<%s id=0x%x len=%d name=", 4238 SPP_ARGS(ifp), 4239 sppp_state_name(sp->state[IDX_PAP]), 4240 sppp_auth_type_name(PPP_PAP, h->type), 4241 h->ident, ntohs(h->len)); 4242 sppp_print_string((char*)name, name_len); 4243 addlog(" secret="); 4244 sppp_print_string((char*)secret, secret_len); 4245 addlog(">\n"); 4246 } 4247 if (name_len != sp->hisauth.name_len || 4248 secret_len != sp->hisauth.secret_len || 4249 memcmp(name, sp->hisauth.name, name_len) != 0 || 4250 memcmp(secret, sp->hisauth.secret, secret_len) != 0) { 4251 /* action scn, tld */ 4252 sp->pp_auth_failures++; 4253 mlen = sizeof(FAILMSG) - 1; 4254 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4255 sizeof mlen, (const char *)&mlen, 4256 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 4257 0); 4258 pap.tld(sp); 4259 break; 4260 } 4261 /* action sca, perhaps tlu */ 4262 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4263 sp->state[IDX_PAP] == STATE_OPENED) { 4264 mlen = sizeof(SUCCMSG) - 1; 4265 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4266 sizeof mlen, (const char *)&mlen, 4267 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 4268 0); 4269 } 4270 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4271 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4272 pap.tlu(sp); 4273 } 4274 break; 4275 4276 /* ack and nak are his authproto */ 4277 case PAP_ACK: 4278 callout_stop(&sp->pap_my_to_ch); 4279 if (debug) { 4280 log(LOG_DEBUG, SPP_FMT "pap success", 4281 SPP_ARGS(ifp)); 4282 name_len = *(char *)h; 4283 if (len > 5 && name_len) { 4284 addlog(": "); 4285 sppp_print_string((char*)(h+1), name_len); 4286 } 4287 addlog("\n"); 4288 } 4289 x = splnet(); 4290 sp->pp_auth_failures = 0; 4291 sp->pp_flags &= ~PP_NEEDAUTH; 4292 if (sp->myauth.proto == PPP_PAP && 4293 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4294 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4295 /* 4296 * We are authenticator for PAP but didn't 4297 * complete yet. Leave it to tlu to proceed 4298 * to network phase. 4299 */ 4300 splx(x); 4301 break; 4302 } 4303 splx(x); 4304 sppp_phase_network(sp); 4305 break; 4306 4307 case PAP_NAK: 4308 callout_stop(&sp->pap_my_to_ch); 4309 sp->pp_auth_failures++; 4310 if (debug) { 4311 log(LOG_INFO, SPP_FMT "pap failure", 4312 SPP_ARGS(ifp)); 4313 name_len = *(char *)h; 4314 if (len > 5 && name_len) { 4315 addlog(": "); 4316 sppp_print_string((char*)(h+1), name_len); 4317 } 4318 addlog("\n"); 4319 } else 4320 log(LOG_INFO, SPP_FMT "pap failure\n", 4321 SPP_ARGS(ifp)); 4322 /* await LCP shutdown by authenticator */ 4323 break; 4324 4325 default: 4326 /* Unknown PAP packet type -- ignore. */ 4327 if (debug) { 4328 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4329 "<0x%x id=0x%x len=%d", 4330 SPP_ARGS(ifp), 4331 h->type, h->ident, ntohs(h->len)); 4332 if (len > 4) 4333 sppp_print_bytes((u_char*)(h+1), len-4); 4334 addlog(">\n"); 4335 } 4336 break; 4337 4338 } 4339 } 4340 4341 static void 4342 sppp_pap_init(struct sppp *sp) 4343 { 4344 /* PAP doesn't have STATE_INITIAL at all. */ 4345 sp->state[IDX_PAP] = STATE_CLOSED; 4346 sp->fail_counter[IDX_PAP] = 0; 4347 sp->pp_seq[IDX_PAP] = 0; 4348 sp->pp_rseq[IDX_PAP] = 0; 4349 callout_init(&sp->ch[IDX_PAP]); 4350 callout_init(&sp->pap_my_to_ch); 4351 } 4352 4353 static void 4354 sppp_pap_open(struct sppp *sp) 4355 { 4356 if (sp->hisauth.proto == PPP_PAP && 4357 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4358 /* we are authenticator for PAP, start our timer */ 4359 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4360 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4361 } 4362 if (sp->myauth.proto == PPP_PAP) { 4363 /* we are peer, send a request, and start a timer */ 4364 pap.scr(sp); 4365 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4366 sppp_pap_my_TO, sp); 4367 } 4368 } 4369 4370 static void 4371 sppp_pap_close(struct sppp *sp) 4372 { 4373 if (sp->state[IDX_PAP] != STATE_CLOSED) 4374 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4375 } 4376 4377 /* 4378 * That's the timeout routine if we are authenticator. Since the 4379 * authenticator is basically passive in PAP, we can't do much here. 4380 */ 4381 static void 4382 sppp_pap_TO(void *cookie) 4383 { 4384 struct sppp *sp = (struct sppp *)cookie; 4385 STDDCL; 4386 int s; 4387 4388 s = splnet(); 4389 if (debug) 4390 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n", 4391 SPP_ARGS(ifp), 4392 sppp_state_name(sp->state[IDX_PAP]), 4393 sp->rst_counter[IDX_PAP]); 4394 4395 if (--sp->rst_counter[IDX_PAP] < 0) 4396 /* TO- event */ 4397 switch (sp->state[IDX_PAP]) { 4398 case STATE_REQ_SENT: 4399 pap.tld(sp); 4400 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4401 break; 4402 } 4403 else 4404 /* TO+ event, not very much we could do */ 4405 switch (sp->state[IDX_PAP]) { 4406 case STATE_REQ_SENT: 4407 /* sppp_cp_change_state() will restart the timer */ 4408 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4409 break; 4410 } 4411 4412 splx(s); 4413 } 4414 4415 /* 4416 * That's the timeout handler if we are peer. Since the peer is active, 4417 * we need to retransmit our PAP request since it is apparently lost. 4418 * XXX We should impose a max counter. 4419 */ 4420 static void 4421 sppp_pap_my_TO(void *cookie) 4422 { 4423 struct sppp *sp = (struct sppp *)cookie; 4424 STDDCL; 4425 4426 if (debug) 4427 log(LOG_DEBUG, SPP_FMT "pap peer TO\n", 4428 SPP_ARGS(ifp)); 4429 4430 pap.scr(sp); 4431 } 4432 4433 static void 4434 sppp_pap_tlu(struct sppp *sp) 4435 { 4436 STDDCL; 4437 int x; 4438 4439 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4440 4441 if (debug) 4442 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 4443 SPP_ARGS(ifp), pap.name); 4444 4445 x = splnet(); 4446 sp->pp_auth_failures = 0; 4447 /* indicate to LCP that we need to be closed down */ 4448 sp->lcp.protos |= (1 << IDX_PAP); 4449 4450 if (sp->pp_flags & PP_NEEDAUTH) { 4451 /* 4452 * Remote is authenticator, but his auth proto didn't 4453 * complete yet. Defer the transition to network 4454 * phase. 4455 */ 4456 splx(x); 4457 return; 4458 } 4459 splx(x); 4460 sppp_phase_network(sp); 4461 } 4462 4463 static void 4464 sppp_pap_tld(struct sppp *sp) 4465 { 4466 STDDCL; 4467 4468 if (debug) 4469 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp)); 4470 callout_stop(&sp->ch[IDX_PAP]); 4471 callout_stop(&sp->pap_my_to_ch); 4472 sp->lcp.protos &= ~(1 << IDX_PAP); 4473 4474 lcp.Close(sp); 4475 } 4476 4477 static void 4478 sppp_pap_scr(struct sppp *sp) 4479 { 4480 u_char idlen, pwdlen; 4481 4482 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4483 /* can't do anything usefull */ 4484 printf(SPP_FMT "pap starting without my name and secret being set\n", 4485 SPP_ARGS(&sp->pp_if)); 4486 return; 4487 } 4488 4489 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4490 pwdlen = sp->myauth.secret_len; 4491 idlen = sp->myauth.name_len; 4492 4493 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4494 sizeof idlen, (const char *)&idlen, 4495 idlen, sp->myauth.name, 4496 sizeof pwdlen, (const char *)&pwdlen, 4497 pwdlen, sp->myauth.secret, 4498 0); 4499 } 4500 4501 /* 4502 * Random miscellaneous functions. 4503 */ 4504 4505 /* 4506 * Send a PAP or CHAP proto packet. 4507 * 4508 * Varadic function, each of the elements for the ellipsis is of type 4509 * ``size_t mlen, const u_char *msg''. Processing will stop iff 4510 * mlen == 0. 4511 * NOTE: never declare variadic functions with types subject to type 4512 * promotion (i.e. u_char). This is asking for big trouble depending 4513 * on the architecture you are on... 4514 */ 4515 4516 static void 4517 sppp_auth_send(const struct cp *cp, struct sppp *sp, 4518 unsigned int type, unsigned int id, 4519 ...) 4520 { 4521 STDDCL; 4522 struct lcp_header *lh; 4523 struct mbuf *m; 4524 u_char *p; 4525 int len; 4526 size_t pkthdrlen; 4527 unsigned int mlen; 4528 const char *msg; 4529 va_list ap; 4530 4531 MGETHDR (m, M_DONTWAIT, MT_DATA); 4532 if (! m) 4533 return; 4534 m->m_pkthdr.rcvif = 0; 4535 4536 if (sp->pp_flags & PP_NOFRAMING) { 4537 *mtod(m, u_int16_t*) = htons(cp->proto); 4538 pkthdrlen = 2; 4539 lh = (struct lcp_header*)(mtod(m, u_int8_t*)+2); 4540 } else { 4541 struct ppp_header *h; 4542 h = mtod (m, struct ppp_header*); 4543 h->address = PPP_ALLSTATIONS; /* broadcast address */ 4544 h->control = PPP_UI; /* Unnumbered Info */ 4545 h->protocol = htons(cp->proto); 4546 pkthdrlen = PPP_HEADER_LEN; 4547 4548 lh = (struct lcp_header*)(h + 1); 4549 } 4550 4551 lh->type = type; 4552 lh->ident = id; 4553 p = (u_char*) (lh+1); 4554 4555 va_start(ap, id); 4556 len = 0; 4557 4558 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 4559 msg = va_arg(ap, const char *); 4560 len += mlen; 4561 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 4562 va_end(ap); 4563 m_freem(m); 4564 return; 4565 } 4566 4567 bcopy(msg, p, mlen); 4568 p += mlen; 4569 } 4570 va_end(ap); 4571 4572 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 4573 lh->len = htons (LCP_HEADER_LEN + len); 4574 4575 if (debug) { 4576 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 4577 SPP_ARGS(ifp), cp->name, 4578 sppp_auth_type_name(cp->proto, lh->type), 4579 lh->ident, ntohs(lh->len)); 4580 if (len) 4581 sppp_print_bytes((u_char*) (lh+1), len); 4582 addlog(">\n"); 4583 } 4584 if (IF_QFULL (&sp->pp_cpq)) { 4585 IF_DROP (&sp->pp_fastq); 4586 IF_DROP (&ifp->if_snd); 4587 m_freem (m); 4588 ++ifp->if_oerrors; 4589 } else 4590 IF_ENQUEUE (&sp->pp_cpq, m); 4591 if (! (ifp->if_flags & IFF_OACTIVE)) 4592 (*ifp->if_start) (ifp); 4593 ifp->if_obytes += m->m_pkthdr.len + 3; 4594 } 4595 4596 /* 4597 * Send keepalive packets, every 10 seconds. 4598 */ 4599 static void 4600 sppp_keepalive(void *dummy) 4601 { 4602 struct sppp *sp; 4603 int s; 4604 time_t now; 4605 4606 s = splnet(); 4607 now = time.tv_sec; 4608 for (sp=spppq; sp; sp=sp->pp_next) { 4609 struct ifnet *ifp = &sp->pp_if; 4610 4611 /* check idle timeout */ 4612 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 4613 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 4614 /* idle timeout is enabled for this interface */ 4615 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 4616 if (ifp->if_flags & IFF_DEBUG) 4617 printf("%s: no activitiy for %lu seconds\n", 4618 sp->pp_if.if_xname, 4619 (unsigned long)(now-sp->pp_last_activity)); 4620 lcp.Close(sp); 4621 continue; 4622 } 4623 } 4624 4625 /* Keepalive mode disabled or channel down? */ 4626 if (! (sp->pp_flags & PP_KEEPALIVE) || 4627 ! (ifp->if_flags & IFF_RUNNING)) 4628 continue; 4629 4630 /* No keepalive in PPP mode if LCP not opened yet. */ 4631 if (! (sp->pp_flags & PP_CISCO) && 4632 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) 4633 continue; 4634 4635 if (sp->pp_alivecnt == MAXALIVECNT) { 4636 /* No keepalive packets got. Stop the interface. */ 4637 if_down (ifp); 4638 IF_PURGE (&sp->pp_cpq); 4639 if (! (sp->pp_flags & PP_CISCO)) { 4640 printf("%s: LCP keepalive timed out, going to restart the connection\n", 4641 ifp->if_xname); 4642 sp->pp_alivecnt = 0; 4643 4644 /* we are down, close all open protocols */ 4645 lcp.Close(sp); 4646 4647 /* And now prepare LCP to reestablish the link, if configured to do so. */ 4648 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 4649 4650 /* Close connection imediatly, completition of this 4651 * will summon the magic needed to reestablish it. */ 4652 sp->pp_tlf(sp); 4653 continue; 4654 } 4655 } 4656 if (sp->pp_alivecnt <= MAXALIVECNT) 4657 ++sp->pp_alivecnt; 4658 if (sp->pp_flags & PP_CISCO) 4659 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ, 4660 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 4661 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 4662 int32_t nmagic = htonl (sp->lcp.magic); 4663 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 4664 sppp_cp_send (sp, PPP_LCP, ECHO_REQ, 4665 sp->lcp.echoid, 4, &nmagic); 4666 } 4667 } 4668 splx(s); 4669 callout_reset(&keepalive_ch, hz * 10, sppp_keepalive, NULL); 4670 } 4671 4672 /* 4673 * Get both IP addresses. 4674 */ 4675 static void 4676 sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, u_int32_t *srcmask) 4677 { 4678 struct ifnet *ifp = &sp->pp_if; 4679 struct ifaddr *ifa; 4680 struct sockaddr_in *si, *sm; 4681 u_int32_t ssrc, ddst; 4682 4683 sm = NULL; 4684 ssrc = ddst = 0; 4685 /* 4686 * Pick the first AF_INET address from the list, 4687 * aliases don't make any sense on a p2p link anyway. 4688 */ 4689 si = 0; 4690 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 4691 if (ifa->ifa_addr->sa_family == AF_INET) { 4692 si = (struct sockaddr_in *)ifa->ifa_addr; 4693 sm = (struct sockaddr_in *)ifa->ifa_netmask; 4694 if (si) 4695 break; 4696 } 4697 } 4698 if (ifa) { 4699 if (si && si->sin_addr.s_addr) { 4700 ssrc = si->sin_addr.s_addr; 4701 if (srcmask) 4702 *srcmask = ntohl(sm->sin_addr.s_addr); 4703 } 4704 4705 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 4706 if (si && si->sin_addr.s_addr) 4707 ddst = si->sin_addr.s_addr; 4708 } 4709 4710 if (dst) *dst = ntohl(ddst); 4711 if (src) *src = ntohl(ssrc); 4712 } 4713 4714 /* 4715 * Set IP addresses. Must be called at splnet. 4716 * If an address is 0, leave it the way it is. 4717 */ 4718 static void 4719 sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr) 4720 { 4721 STDDCL; 4722 struct ifaddr *ifa; 4723 struct sockaddr_in *si; 4724 struct sockaddr_in *dest; 4725 4726 /* 4727 * Pick the first AF_INET address from the list, 4728 * aliases don't make any sense on a p2p link anyway. 4729 */ 4730 4731 si = 0; 4732 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4733 { 4734 if (ifa->ifa_addr->sa_family == AF_INET) 4735 { 4736 si = (struct sockaddr_in *)ifa->ifa_addr; 4737 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4738 if (si) 4739 break; 4740 } 4741 } 4742 4743 if (ifa && si) 4744 { 4745 int error; 4746 struct sockaddr_in new_sin = *si; 4747 struct sockaddr_in new_dst = *dest; 4748 4749 /* 4750 * Scrub old routes now instead of calling in_ifinit with 4751 * scrub=1, because we may change the dstaddr 4752 * before the call to in_ifinit. 4753 */ 4754 in_ifscrub(ifp, ifatoia(ifa)); 4755 4756 if (myaddr != 0) 4757 new_sin.sin_addr.s_addr = htonl(myaddr); 4758 if (hisaddr != 0) { 4759 new_dst.sin_addr.s_addr = htonl(hisaddr); 4760 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) { 4761 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 4762 *dest = new_dst; /* fix dstaddr in place */ 4763 } 4764 } 4765 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4766 if(debug && error) 4767 { 4768 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addrs: in_ifinit " 4769 " failed, error=%d\n", SPP_ARGS(ifp), error); 4770 } 4771 } 4772 } 4773 4774 /* 4775 * Clear IP addresses. Must be called at splnet. 4776 */ 4777 static void 4778 sppp_clear_ip_addrs(struct sppp *sp) 4779 { 4780 struct ifnet *ifp = &sp->pp_if; 4781 struct ifaddr *ifa; 4782 struct sockaddr_in *si; 4783 struct sockaddr_in *dest; 4784 4785 u_int32_t remote; 4786 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4787 remote = sp->ipcp.saved_hisaddr; 4788 else 4789 sppp_get_ip_addrs(sp, 0, &remote, 0); 4790 4791 /* 4792 * Pick the first AF_INET address from the list, 4793 * aliases don't make any sense on a p2p link anyway. 4794 */ 4795 4796 si = 0; 4797 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4798 { 4799 if (ifa->ifa_addr->sa_family == AF_INET) 4800 { 4801 si = (struct sockaddr_in *)ifa->ifa_addr; 4802 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4803 if (si) 4804 break; 4805 } 4806 } 4807 4808 if (ifa && si) 4809 { 4810 struct sockaddr_in new_sin = *si; 4811 4812 in_ifscrub(ifp, ifatoia(ifa)); 4813 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 4814 new_sin.sin_addr.s_addr = 0; 4815 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4816 /* replace peer addr in place */ 4817 dest->sin_addr.s_addr = sp->ipcp.saved_hisaddr; 4818 in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4819 } 4820 } 4821 4822 #ifdef INET6 4823 /* 4824 * Get both IPv6 addresses. 4825 */ 4826 static void 4827 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 4828 struct in6_addr *srcmask) 4829 { 4830 struct ifnet *ifp = &sp->pp_if; 4831 struct ifaddr *ifa; 4832 struct sockaddr_in6 *si, *sm; 4833 struct in6_addr ssrc, ddst; 4834 4835 sm = NULL; 4836 memset(&ssrc, 0, sizeof(ssrc)); 4837 memset(&ddst, 0, sizeof(ddst)); 4838 /* 4839 * Pick the first link-local AF_INET6 address from the list, 4840 * aliases don't make any sense on a p2p link anyway. 4841 */ 4842 si = 0; 4843 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4844 if (ifa->ifa_addr->sa_family == AF_INET6) { 4845 si = (struct sockaddr_in6 *)ifa->ifa_addr; 4846 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 4847 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 4848 break; 4849 } 4850 if (ifa) { 4851 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 4852 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc)); 4853 if (srcmask) { 4854 bcopy(&sm->sin6_addr, srcmask, 4855 sizeof(*srcmask)); 4856 } 4857 } 4858 4859 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 4860 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 4861 bcopy(&si->sin6_addr, &ddst, sizeof(ddst)); 4862 } 4863 4864 if (dst) 4865 bcopy(&ddst, dst, sizeof(*dst)); 4866 if (src) 4867 bcopy(&ssrc, src, sizeof(*src)); 4868 } 4869 4870 #ifdef IPV6CP_MYIFID_DYN 4871 /* 4872 * Generate random ifid. 4873 */ 4874 static void 4875 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 4876 { 4877 /* TBD */ 4878 } 4879 4880 /* 4881 * Set my IPv6 address. Must be called at splnet. 4882 */ 4883 static void 4884 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 4885 { 4886 STDDCL; 4887 struct ifaddr *ifa; 4888 struct sockaddr_in6 *sin6; 4889 4890 /* 4891 * Pick the first link-local AF_INET6 address from the list, 4892 * aliases don't make any sense on a p2p link anyway. 4893 */ 4894 4895 sin6 = NULL; 4896 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4897 { 4898 if (ifa->ifa_addr->sa_family == AF_INET6) 4899 { 4900 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 4901 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 4902 break; 4903 } 4904 } 4905 4906 if (ifa && sin6) 4907 { 4908 int error; 4909 struct sockaddr_in6 new_sin6 = *sin6; 4910 4911 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr)); 4912 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 4913 if (debug && error) 4914 { 4915 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit " 4916 " failed, error=%d\n", SPP_ARGS(ifp), error); 4917 } 4918 } 4919 } 4920 #endif 4921 4922 /* 4923 * Suggest a candidate address to be used by peer. 4924 */ 4925 static void 4926 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 4927 { 4928 struct in6_addr myaddr; 4929 struct timeval tv; 4930 4931 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4932 4933 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 4934 microtime(&tv); 4935 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 4936 myaddr.s6_addr[14] ^= 0xff; 4937 myaddr.s6_addr[15] ^= 0xff; 4938 } else { 4939 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 4940 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 4941 } 4942 if (suggest) 4943 bcopy(&myaddr, suggest, sizeof(myaddr)); 4944 } 4945 #endif /*INET6*/ 4946 4947 /* 4948 * Process ioctl requests specific to the PPP interface. 4949 * Permissions have already been checked. 4950 */ 4951 static int 4952 sppp_params(struct sppp *sp, int cmd, void *data) 4953 { 4954 switch (cmd) { 4955 case SPPPGETAUTHCFG: 4956 { 4957 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 4958 int error; 4959 size_t len; 4960 4961 cfg->myauthflags = sp->myauth.flags; 4962 cfg->hisauthflags = sp->hisauth.flags; 4963 strncpy(cfg->ifname, sp->pp_if.if_xname, IFNAMSIZ); 4964 cfg->hisauth = 0; 4965 if (sp->hisauth.proto) 4966 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4967 cfg->myauth = 0; 4968 if (sp->myauth.proto) 4969 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4970 if (cfg->myname_length == 0) { 4971 if (sp->myauth.name != NULL) 4972 cfg->myname_length = sp->myauth.name_len + 1; 4973 } else { 4974 if (sp->myauth.name == NULL) { 4975 cfg->myname_length = 0; 4976 } else { 4977 len = sp->myauth.name_len + 1; 4978 if (cfg->myname_length < len) 4979 return (ENAMETOOLONG); 4980 error = copyout(sp->myauth.name, cfg->myname, len); 4981 if (error) return error; 4982 } 4983 } 4984 if (cfg->hisname_length == 0) { 4985 if(sp->hisauth.name != NULL) 4986 cfg->hisname_length = sp->hisauth.name_len + 1; 4987 } else { 4988 if (sp->hisauth.name == NULL) { 4989 cfg->hisname_length = 0; 4990 } else { 4991 len = sp->hisauth.name_len + 1; 4992 if (cfg->hisname_length < len) 4993 return (ENAMETOOLONG); 4994 error = copyout(sp->hisauth.name, cfg->hisname, len); 4995 if (error) return error; 4996 } 4997 } 4998 } 4999 break; 5000 case SPPPSETAUTHCFG: 5001 { 5002 struct spppauthcfg *cfg = (struct spppauthcfg*)data; 5003 int error; 5004 5005 if (sp->myauth.name) { 5006 free(sp->myauth.name, M_DEVBUF); 5007 sp->myauth.name = NULL; 5008 } 5009 if (sp->myauth.secret) { 5010 free(sp->myauth.secret, M_DEVBUF); 5011 sp->myauth.secret = NULL; 5012 } 5013 if (sp->hisauth.name) { 5014 free(sp->hisauth.name, M_DEVBUF); 5015 sp->hisauth.name = NULL; 5016 } 5017 if (sp->hisauth.secret) { 5018 free(sp->hisauth.secret, M_DEVBUF); 5019 sp->hisauth.secret = NULL; 5020 } 5021 5022 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5023 if (cfg->hisname_length >= MCLBYTES) 5024 return (ENAMETOOLONG); 5025 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5026 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5027 if (error) { 5028 free(sp->hisauth.name, M_DEVBUF); 5029 sp->hisauth.name = NULL; 5030 return error; 5031 } 5032 sp->hisauth.name_len = cfg->hisname_length - 1; 5033 sp->hisauth.name[sp->hisauth.name_len] = 0; 5034 } 5035 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5036 if (cfg->hissecret_length >= MCLBYTES) 5037 return (ENAMETOOLONG); 5038 sp->hisauth.secret = malloc(cfg->hissecret_length, M_DEVBUF, M_WAITOK); 5039 error = copyin(cfg->hissecret, sp->hisauth.secret, cfg->hissecret_length); 5040 if (error) { 5041 free(sp->hisauth.secret, M_DEVBUF); 5042 sp->hisauth.secret = NULL; 5043 return error; 5044 } 5045 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5046 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5047 } 5048 if (cfg->myname != NULL && cfg->myname_length > 0) { 5049 if (cfg->myname_length >= MCLBYTES) 5050 return (ENAMETOOLONG); 5051 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5052 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5053 if (error) { 5054 free(sp->myauth.name, M_DEVBUF); 5055 sp->myauth.name = NULL; 5056 return error; 5057 } 5058 sp->myauth.name_len = cfg->myname_length - 1; 5059 sp->myauth.name[sp->myauth.name_len] = 0; 5060 } 5061 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5062 if (cfg->mysecret_length >= MCLBYTES) 5063 return (ENAMETOOLONG); 5064 sp->myauth.secret = malloc(cfg->mysecret_length, M_DEVBUF, M_WAITOK); 5065 error = copyin(cfg->mysecret, sp->myauth.secret, cfg->mysecret_length); 5066 if (error) { 5067 free(sp->myauth.secret, M_DEVBUF); 5068 sp->myauth.secret = NULL; 5069 return error; 5070 } 5071 sp->myauth.secret_len = cfg->mysecret_length - 1; 5072 sp->myauth.secret[sp->myauth.secret_len] = 0; 5073 } 5074 sp->myauth.flags = cfg->myauthflags; 5075 if (cfg->myauth) 5076 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5077 sp->hisauth.flags = cfg->hisauthflags; 5078 if (cfg->hisauth) 5079 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5080 sp->pp_auth_failures = 0; 5081 if (sp->hisauth.proto != 0) 5082 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 5083 else 5084 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 5085 } 5086 break; 5087 case SPPPGETLCPCFG: 5088 { 5089 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5090 lcp->lcp_timeout = sp->lcp.timeout; 5091 } 5092 break; 5093 case SPPPSETLCPCFG: 5094 { 5095 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5096 sp->lcp.timeout = lcp->lcp_timeout; 5097 } 5098 break; 5099 case SPPPGETSTATUS: 5100 { 5101 struct spppstatus *status = (struct spppstatus *)data; 5102 status->phase = sp->pp_phase; 5103 } 5104 break; 5105 case SPPPGETIDLETO: 5106 { 5107 struct spppidletimeout *to = (struct spppidletimeout *)data; 5108 to->idle_seconds = sp->pp_idle_timeout; 5109 } 5110 break; 5111 case SPPPSETIDLETO: 5112 { 5113 struct spppidletimeout *to = (struct spppidletimeout *)data; 5114 sp->pp_idle_timeout = to->idle_seconds; 5115 } 5116 break; 5117 case SPPPSETAUTHFAILURE: 5118 { 5119 struct spppauthfailuresettings *afsettings = (struct spppauthfailuresettings *)data; 5120 sp->pp_max_auth_fail = afsettings->max_failures; 5121 sp->pp_auth_failures = 0; 5122 } 5123 break; 5124 case SPPPGETAUTHFAILURES: 5125 { 5126 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5127 stats->auth_failures = sp->pp_auth_failures; 5128 stats->max_failures = sp->pp_max_auth_fail; 5129 } 5130 break; 5131 case SPPPSETDNSOPTS: 5132 { 5133 struct spppdnssettings *req = (struct spppdnssettings*)data; 5134 sp->query_dns = req->query_dns & 3; 5135 } 5136 break; 5137 case SPPPGETDNSOPTS: 5138 { 5139 struct spppdnssettings *req = (struct spppdnssettings*)data; 5140 req->query_dns = sp->query_dns; 5141 } 5142 break; 5143 case SPPPGETDNSADDRS: 5144 { 5145 struct spppdnsaddrs *addrs = (struct spppdnsaddrs*)data; 5146 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5147 } 5148 break; 5149 default: 5150 return (EINVAL); 5151 } 5152 5153 return (0); 5154 } 5155 5156 static void 5157 sppp_phase_network(struct sppp *sp) 5158 { 5159 STDDCL; 5160 int i; 5161 u_int32_t mask; 5162 5163 sp->pp_phase = SPPP_PHASE_NETWORK; 5164 5165 if(debug) 5166 { 5167 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 5168 sppp_phase_name(sp->pp_phase)); 5169 } 5170 5171 /* Notify NCPs now. */ 5172 for (i = 0; i < IDX_COUNT; i++) 5173 if ((cps[i])->flags & CP_NCP) 5174 (cps[i])->Open(sp); 5175 5176 /* Send Up events to all NCPs. */ 5177 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5178 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) 5179 (cps[i])->Up(sp); 5180 5181 /* if no NCP is starting, all this was in vain, close down */ 5182 sppp_lcp_check_and_close(sp); 5183 } 5184 5185 5186 static const char * 5187 sppp_cp_type_name(u_char type) 5188 { 5189 static char buf[12]; 5190 switch (type) { 5191 case CONF_REQ: return "conf-req"; 5192 case CONF_ACK: return "conf-ack"; 5193 case CONF_NAK: return "conf-nak"; 5194 case CONF_REJ: return "conf-rej"; 5195 case TERM_REQ: return "term-req"; 5196 case TERM_ACK: return "term-ack"; 5197 case CODE_REJ: return "code-rej"; 5198 case PROTO_REJ: return "proto-rej"; 5199 case ECHO_REQ: return "echo-req"; 5200 case ECHO_REPLY: return "echo-reply"; 5201 case DISC_REQ: return "discard-req"; 5202 } 5203 sprintf (buf, "0x%x", type); 5204 return buf; 5205 } 5206 5207 static const char * 5208 sppp_auth_type_name(u_short proto, u_char type) 5209 { 5210 static char buf[12]; 5211 switch (proto) { 5212 case PPP_CHAP: 5213 switch (type) { 5214 case CHAP_CHALLENGE: return "challenge"; 5215 case CHAP_RESPONSE: return "response"; 5216 case CHAP_SUCCESS: return "success"; 5217 case CHAP_FAILURE: return "failure"; 5218 } 5219 case PPP_PAP: 5220 switch (type) { 5221 case PAP_REQ: return "req"; 5222 case PAP_ACK: return "ack"; 5223 case PAP_NAK: return "nak"; 5224 } 5225 } 5226 sprintf (buf, "0x%x", type); 5227 return buf; 5228 } 5229 5230 static const char * 5231 sppp_lcp_opt_name(u_char opt) 5232 { 5233 static char buf[12]; 5234 switch (opt) { 5235 case LCP_OPT_MRU: return "mru"; 5236 case LCP_OPT_ASYNC_MAP: return "async-map"; 5237 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 5238 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 5239 case LCP_OPT_MAGIC: return "magic"; 5240 case LCP_OPT_PROTO_COMP: return "proto-comp"; 5241 case LCP_OPT_ADDR_COMP: return "addr-comp"; 5242 } 5243 sprintf (buf, "0x%x", opt); 5244 return buf; 5245 } 5246 5247 static const char * 5248 sppp_ipcp_opt_name(u_char opt) 5249 { 5250 static char buf[12]; 5251 switch (opt) { 5252 case IPCP_OPT_ADDRESSES: return "addresses"; 5253 case IPCP_OPT_COMPRESSION: return "compression"; 5254 case IPCP_OPT_ADDRESS: return "address"; 5255 } 5256 sprintf (buf, "0x%x", opt); 5257 return buf; 5258 } 5259 5260 #ifdef INET6 5261 static const char * 5262 sppp_ipv6cp_opt_name(u_char opt) 5263 { 5264 static char buf[12]; 5265 switch (opt) { 5266 case IPV6CP_OPT_IFID: return "ifid"; 5267 case IPV6CP_OPT_COMPRESSION: return "compression"; 5268 } 5269 sprintf (buf, "0x%x", opt); 5270 return buf; 5271 } 5272 #endif 5273 5274 static const char * 5275 sppp_state_name(int state) 5276 { 5277 switch (state) { 5278 case STATE_INITIAL: return "initial"; 5279 case STATE_STARTING: return "starting"; 5280 case STATE_CLOSED: return "closed"; 5281 case STATE_STOPPED: return "stopped"; 5282 case STATE_CLOSING: return "closing"; 5283 case STATE_STOPPING: return "stopping"; 5284 case STATE_REQ_SENT: return "req-sent"; 5285 case STATE_ACK_RCVD: return "ack-rcvd"; 5286 case STATE_ACK_SENT: return "ack-sent"; 5287 case STATE_OPENED: return "opened"; 5288 } 5289 return "illegal"; 5290 } 5291 5292 static const char * 5293 sppp_phase_name(int phase) 5294 { 5295 switch (phase) { 5296 case SPPP_PHASE_DEAD: return "dead"; 5297 case SPPP_PHASE_ESTABLISH: return "establish"; 5298 case SPPP_PHASE_TERMINATE: return "terminate"; 5299 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 5300 case SPPP_PHASE_NETWORK: return "network"; 5301 } 5302 return "illegal"; 5303 } 5304 5305 static const char * 5306 sppp_proto_name(u_short proto) 5307 { 5308 static char buf[12]; 5309 switch (proto) { 5310 case PPP_LCP: return "lcp"; 5311 case PPP_IPCP: return "ipcp"; 5312 case PPP_PAP: return "pap"; 5313 case PPP_CHAP: return "chap"; 5314 case PPP_IPV6CP: return "ipv6cp"; 5315 } 5316 sprintf(buf, "0x%x", (unsigned)proto); 5317 return buf; 5318 } 5319 5320 static void 5321 sppp_print_bytes(const u_char *p, u_short len) 5322 { 5323 addlog(" %02x", *p++); 5324 while (--len > 0) 5325 addlog("-%02x", *p++); 5326 } 5327 5328 static void 5329 sppp_print_string(const char *p, u_short len) 5330 { 5331 u_char c; 5332 5333 while (len-- > 0) { 5334 c = *p++; 5335 /* 5336 * Print only ASCII chars directly. RFC 1994 recommends 5337 * using only them, but we don't rely on it. */ 5338 if (c < ' ' || c > '~') 5339 addlog("\\x%x", c); 5340 else 5341 addlog("%c", c); 5342 } 5343 } 5344 5345 static const char * 5346 sppp_dotted_quad(u_int32_t addr) 5347 { 5348 static char s[16]; 5349 sprintf(s, "%d.%d.%d.%d", 5350 (int)((addr >> 24) & 0xff), 5351 (int)((addr >> 16) & 0xff), 5352 (int)((addr >> 8) & 0xff), 5353 (int)(addr & 0xff)); 5354 return s; 5355 } 5356 5357 /* a dummy, used to drop uninteresting events */ 5358 static void 5359 sppp_null(struct sppp *unused) 5360 { 5361 /* do just nothing */ 5362 } 5363 /* 5364 * This file is large. Tell emacs to highlight it nevertheless. 5365 * 5366 * Local Variables: 5367 * hilit-auto-highlight-maxout: 120000 5368 * End: 5369 */ 5370
Indexes created Thu Oct 16 14:10:15 GMT 2025