if_spppsubr.c revision 1.48
1 /* $NetBSD: if_spppsubr.c,v 1.48 2002/07/06 18:33:45 itojun Exp $ */ 2 3 /* 4 * Synchronous PPP/Cisco link level subroutines. 5 * Keepalive protocol implemented in both Cisco and PPP modes. 6 * 7 * Copyright (C) 1994-1996 Cronyx Engineering Ltd. 8 * Author: Serge Vakulenko, <vak (at) cronyx.ru> 9 * 10 * Heavily revamped to conform to RFC 1661. 11 * Copyright (C) 1997, Joerg Wunsch. 12 * 13 * RFC2472 IPv6CP support. 14 * Copyright (C) 2000, Jun-ichiro itojun Hagino <itojun (at) iijlab.net>. 15 * 16 * This software is distributed with NO WARRANTIES, not even the implied 17 * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 18 * 19 * Authors grant any other persons or organisations permission to use 20 * or modify this software as long as this message is kept with the software, 21 * all derivative works or modified versions. 22 * 23 * From: Version 2.4, Thu Apr 30 17:17:21 MSD 1997 24 * 25 * From: if_spppsubr.c,v 1.39 1998/04/04 13:26:03 phk Exp 26 * 27 * From: Id: if_spppsubr.c,v 1.23 1999/02/23 14:47:50 hm Exp 28 */ 29 30 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: if_spppsubr.c,v 1.48 2002/07/06 18:33:45 itojun Exp $"); 32 33 #include "opt_inet.h" 34 #include "opt_ipx.h" 35 #include "opt_iso.h" 36 #include "opt_ns.h" 37 38 #include <sys/param.h> 39 #include <sys/proc.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/sockio.h> 43 #include <sys/socket.h> 44 #include <sys/syslog.h> 45 #include <sys/malloc.h> 46 #include <sys/mbuf.h> 47 #include <sys/callout.h> 48 #include <sys/md5.h> 49 50 #include <net/if.h> 51 #include <net/netisr.h> 52 #include <net/if_types.h> 53 #include <net/route.h> 54 #include <net/ppp_defs.h> 55 56 #include <machine/stdarg.h> 57 58 #include <netinet/in.h> 59 #include <netinet/in_systm.h> 60 #include <netinet/in_var.h> 61 #ifdef INET 62 #include <netinet/ip.h> 63 #include <netinet/tcp.h> 64 #endif 65 #include <net/ethertypes.h> 66 67 #ifdef IPX 68 #include <netipx/ipx.h> 69 #include <netipx/ipx_if.h> 70 #endif 71 72 #ifdef NS 73 #include <netns/ns.h> 74 #include <netns/ns_if.h> 75 #endif 76 77 #ifdef ISO 78 #include <netiso/argo_debug.h> 79 #include <netiso/iso.h> 80 #include <netiso/iso_var.h> 81 #include <netiso/iso_snpac.h> 82 #endif 83 84 #include <net/if_sppp.h> 85 #include <net/if_spppvar.h> 86 87 #define 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 p[2] = p[3] = p[4] = p[5] = 0; 2274 break; 2275 2276 case LCP_OPT_MRU: 2277 /* 2278 * Maximum receive unit. Always agreeable, 2279 * but ignored by now. 2280 */ 2281 sp->lcp.their_mru = p[2] * 256 + p[3]; 2282 if (debug) 2283 addlog(" %ld", sp->lcp.their_mru); 2284 continue; 2285 2286 case LCP_OPT_AUTH_PROTO: 2287 authproto = (p[2] << 8) + p[3]; 2288 if (sp->myauth.proto != authproto) { 2289 /* not agreed, nak */ 2290 if (debug) 2291 addlog(" [mine %s != his %s]", 2292 sppp_proto_name(sp->hisauth.proto), 2293 sppp_proto_name(authproto)); 2294 p[2] = sp->myauth.proto >> 8; 2295 p[3] = sp->myauth.proto; 2296 break; 2297 } 2298 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2299 if (debug) 2300 addlog(" [chap not MD5]"); 2301 p[4] = CHAP_MD5; 2302 break; 2303 } 2304 continue; 2305 } 2306 /* Add the option to nak'ed list. */ 2307 bcopy (p, r, p[1]); 2308 r += p[1]; 2309 rlen += p[1]; 2310 } 2311 if (rlen) { 2312 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2313 if (debug) 2314 addlog(" max_failure (%d) exceeded, " 2315 "send conf-rej\n", 2316 sp->lcp.max_failure); 2317 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2318 } else { 2319 if (debug) 2320 addlog(" send conf-nak\n"); 2321 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2322 } 2323 goto end; 2324 } else { 2325 if (debug) 2326 addlog(" send conf-ack\n"); 2327 sp->fail_counter[IDX_LCP] = 0; 2328 sp->pp_loopcnt = 0; 2329 sppp_cp_send (sp, PPP_LCP, CONF_ACK, 2330 h->ident, origlen, h+1); 2331 } 2332 2333 end: 2334 free (buf, M_TEMP); 2335 return (rlen == 0); 2336 } 2337 2338 /* 2339 * Analyze the LCP Configure-Reject option list, and adjust our 2340 * negotiation. 2341 */ 2342 static void 2343 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2344 { 2345 STDDCL; 2346 u_char *buf, *p; 2347 2348 len -= 4; 2349 buf = malloc (len, M_TEMP, M_NOWAIT); 2350 if (!buf) 2351 return; 2352 2353 if (debug) 2354 log(LOG_DEBUG, SPP_FMT "lcp rej opts:", 2355 SPP_ARGS(ifp)); 2356 2357 p = (void*) (h+1); 2358 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2359 if (debug) 2360 addlog(" %s", sppp_lcp_opt_name(*p)); 2361 switch (*p) { 2362 case LCP_OPT_MAGIC: 2363 /* Magic number -- can't use it, use 0 */ 2364 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2365 sp->lcp.magic = 0; 2366 break; 2367 case LCP_OPT_MRU: 2368 /* 2369 * Should not be rejected anyway, since we only 2370 * negotiate a MRU if explicitly requested by 2371 * peer. 2372 */ 2373 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2374 break; 2375 case LCP_OPT_AUTH_PROTO: 2376 /* 2377 * Peer doesn't want to authenticate himself, 2378 * deny unless this is a dialout call, and 2379 * SPPP_AUTHFLAG_NOCALLOUT is set. 2380 */ 2381 if ((sp->pp_flags & PP_CALLIN) == 0 && 2382 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2383 if (debug) 2384 addlog(" [don't insist on auth " 2385 "for callout]"); 2386 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2387 break; 2388 } 2389 if (debug) 2390 addlog("[access denied]\n"); 2391 lcp.Close(sp); 2392 break; 2393 } 2394 } 2395 if (debug) 2396 addlog("\n"); 2397 free (buf, M_TEMP); 2398 return; 2399 } 2400 2401 /* 2402 * Analyze the LCP Configure-NAK option list, and adjust our 2403 * negotiation. 2404 */ 2405 static void 2406 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2407 { 2408 STDDCL; 2409 u_char *buf, *p; 2410 u_int32_t magic; 2411 2412 len -= 4; 2413 buf = malloc (len, M_TEMP, M_NOWAIT); 2414 if (!buf) 2415 return; 2416 2417 if (debug) 2418 log(LOG_DEBUG, SPP_FMT "lcp nak opts:", 2419 SPP_ARGS(ifp)); 2420 2421 p = (void*) (h+1); 2422 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2423 if (debug) 2424 addlog(" %s", sppp_lcp_opt_name(*p)); 2425 switch (*p) { 2426 case LCP_OPT_MAGIC: 2427 /* Magic number -- renegotiate */ 2428 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2429 len >= 6 && p[1] == 6) { 2430 magic = (u_int32_t)p[2] << 24 | 2431 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2432 /* 2433 * If the remote magic is our negated one, 2434 * this looks like a loopback problem. 2435 * Suggest a new magic to make sure. 2436 */ 2437 if (magic == ~sp->lcp.magic) { 2438 if (debug) 2439 addlog(" magic glitch"); 2440 sp->lcp.magic = random(); 2441 } else { 2442 sp->lcp.magic = magic; 2443 if (debug) 2444 addlog(" %d", magic); 2445 } 2446 } 2447 break; 2448 case LCP_OPT_MRU: 2449 /* 2450 * Peer wants to advise us to negotiate an MRU. 2451 * Agree on it if it's reasonable, or use 2452 * default otherwise. 2453 */ 2454 if (len >= 4 && p[1] == 4) { 2455 u_int mru = p[2] * 256 + p[3]; 2456 if (debug) 2457 addlog(" %d", mru); 2458 if (mru < PP_MTU || mru > PP_MAX_MRU) 2459 mru = PP_MTU; 2460 sp->lcp.mru = mru; 2461 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2462 } 2463 break; 2464 case LCP_OPT_AUTH_PROTO: 2465 /* 2466 * Peer doesn't like our authentication method, 2467 * deny. 2468 */ 2469 if (debug) 2470 addlog("[access denied]\n"); 2471 lcp.Close(sp); 2472 break; 2473 } 2474 } 2475 if (debug) 2476 addlog("\n"); 2477 free (buf, M_TEMP); 2478 return; 2479 } 2480 2481 static void 2482 sppp_lcp_tlu(struct sppp *sp) 2483 { 2484 STDDCL; 2485 int i; 2486 u_int32_t mask; 2487 2488 /* XXX ? */ 2489 if (! (ifp->if_flags & IFF_UP) && 2490 (ifp->if_flags & IFF_RUNNING)) { 2491 /* Coming out of loopback mode. */ 2492 if_up(ifp); 2493 } 2494 2495 for (i = 0; i < IDX_COUNT; i++) 2496 if ((cps[i])->flags & CP_QUAL) 2497 (cps[i])->Open(sp); 2498 2499 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2500 (sp->pp_flags & PP_NEEDAUTH) != 0) 2501 sp->pp_phase = SPPP_PHASE_AUTHENTICATE; 2502 else 2503 sp->pp_phase = SPPP_PHASE_NETWORK; 2504 2505 if(debug) 2506 { 2507 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2508 sppp_phase_name(sp->pp_phase)); 2509 } 2510 2511 /* 2512 * Open all authentication protocols. This is even required 2513 * if we already proceeded to network phase, since it might be 2514 * that remote wants us to authenticate, so we might have to 2515 * send a PAP request. Undesired authentication protocols 2516 * don't do anything when they get an Open event. 2517 */ 2518 for (i = 0; i < IDX_COUNT; i++) 2519 if ((cps[i])->flags & CP_AUTH) 2520 (cps[i])->Open(sp); 2521 2522 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2523 /* Notify all NCPs. */ 2524 for (i = 0; i < IDX_COUNT; i++) 2525 if ((cps[i])->flags & CP_NCP) 2526 (cps[i])->Open(sp); 2527 } 2528 2529 /* Send Up events to all started protos. */ 2530 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2531 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) 2532 (cps[i])->Up(sp); 2533 2534 /* notify low-level driver of state change */ 2535 if (sp->pp_chg) 2536 sp->pp_chg(sp, (int)sp->pp_phase); 2537 2538 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2539 /* if no NCP is starting, close down */ 2540 sppp_lcp_check_and_close(sp); 2541 } 2542 2543 static void 2544 sppp_lcp_tld(struct sppp *sp) 2545 { 2546 STDDCL; 2547 int i; 2548 u_int32_t mask; 2549 2550 sp->pp_phase = SPPP_PHASE_TERMINATE; 2551 2552 if(debug) 2553 { 2554 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2555 sppp_phase_name(sp->pp_phase)); 2556 } 2557 2558 /* 2559 * Take upper layers down. We send the Down event first and 2560 * the Close second to prevent the upper layers from sending 2561 * ``a flurry of terminate-request packets'', as the RFC 2562 * describes it. 2563 */ 2564 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2565 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2566 (cps[i])->Down(sp); 2567 (cps[i])->Close(sp); 2568 } 2569 } 2570 2571 static void 2572 sppp_lcp_tls(struct sppp *sp) 2573 { 2574 STDDCL; 2575 2576 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2577 printf("%s: authentication failed %d times, not retrying again\n", 2578 sp->pp_if.if_xname, sp->pp_auth_failures); 2579 if_down(&sp->pp_if); 2580 return; 2581 } 2582 2583 sp->pp_phase = SPPP_PHASE_ESTABLISH; 2584 2585 if(debug) 2586 { 2587 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2588 sppp_phase_name(sp->pp_phase)); 2589 } 2590 2591 /* Notify lower layer if desired. */ 2592 if (sp->pp_tls) 2593 (sp->pp_tls)(sp); 2594 } 2595 2596 static void 2597 sppp_lcp_tlf(struct sppp *sp) 2598 { 2599 STDDCL; 2600 2601 sp->pp_phase = SPPP_PHASE_DEAD; 2602 2603 if(debug) 2604 { 2605 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2606 sppp_phase_name(sp->pp_phase)); 2607 } 2608 2609 /* Notify lower layer if desired. */ 2610 if (sp->pp_tlf) 2611 (sp->pp_tlf)(sp); 2612 } 2613 2614 static void 2615 sppp_lcp_scr(struct sppp *sp) 2616 { 2617 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2618 int i = 0; 2619 u_short authproto; 2620 2621 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2622 if (! sp->lcp.magic) 2623 sp->lcp.magic = random(); 2624 opt[i++] = LCP_OPT_MAGIC; 2625 opt[i++] = 6; 2626 opt[i++] = sp->lcp.magic >> 24; 2627 opt[i++] = sp->lcp.magic >> 16; 2628 opt[i++] = sp->lcp.magic >> 8; 2629 opt[i++] = sp->lcp.magic; 2630 } 2631 2632 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2633 opt[i++] = LCP_OPT_MRU; 2634 opt[i++] = 4; 2635 opt[i++] = sp->lcp.mru >> 8; 2636 opt[i++] = sp->lcp.mru; 2637 } 2638 2639 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2640 authproto = sp->hisauth.proto; 2641 opt[i++] = LCP_OPT_AUTH_PROTO; 2642 opt[i++] = authproto == PPP_CHAP? 5: 4; 2643 opt[i++] = authproto >> 8; 2644 opt[i++] = authproto; 2645 if (authproto == PPP_CHAP) 2646 opt[i++] = CHAP_MD5; 2647 } 2648 2649 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2650 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2651 } 2652 2653 /* 2654 * Check the open NCPs, return true if at least one NCP is open. 2655 */ 2656 static int 2657 sppp_ncp_check(struct sppp *sp) 2658 { 2659 int i, mask; 2660 2661 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2662 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2663 return 1; 2664 return 0; 2665 } 2666 2667 /* 2668 * Re-check the open NCPs and see if we should terminate the link. 2669 * Called by the NCPs during their tlf action handling. 2670 */ 2671 static void 2672 sppp_lcp_check_and_close(struct sppp *sp) 2673 { 2674 2675 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2676 /* don't bother, we are already going down */ 2677 return; 2678 2679 if (sppp_ncp_check(sp)) 2680 return; 2681 2682 lcp.Close(sp); 2683 } 2684 2685 2686 /* 2687 *--------------------------------------------------------------------------* 2688 * * 2689 * The IPCP implementation. * 2690 * * 2691 *--------------------------------------------------------------------------* 2692 */ 2693 2694 static void 2695 sppp_ipcp_init(struct sppp *sp) 2696 { 2697 sp->ipcp.opts = 0; 2698 sp->ipcp.flags = 0; 2699 sp->state[IDX_IPCP] = STATE_INITIAL; 2700 sp->fail_counter[IDX_IPCP] = 0; 2701 sp->pp_seq[IDX_IPCP] = 0; 2702 sp->pp_rseq[IDX_IPCP] = 0; 2703 callout_init(&sp->ch[IDX_IPCP]); 2704 } 2705 2706 static void 2707 sppp_ipcp_up(struct sppp *sp) 2708 { 2709 sppp_up_event(&ipcp, sp); 2710 } 2711 2712 static void 2713 sppp_ipcp_down(struct sppp *sp) 2714 { 2715 sppp_down_event(&ipcp, sp); 2716 } 2717 2718 static void 2719 sppp_ipcp_open(struct sppp *sp) 2720 { 2721 STDDCL; 2722 u_int32_t myaddr, hisaddr; 2723 2724 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 2725 sp->ipcp.req_myaddr = 0; 2726 sp->ipcp.req_hisaddr = 0; 2727 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 2728 2729 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 2730 /* 2731 * If we don't have his address, this probably means our 2732 * interface doesn't want to talk IP at all. (This could 2733 * be the case if somebody wants to speak only IPX, for 2734 * example.) Don't open IPCP in this case. 2735 */ 2736 if (hisaddr == 0L) { 2737 /* XXX this message should go away */ 2738 if (debug) 2739 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n", 2740 SPP_ARGS(ifp)); 2741 return; 2742 } 2743 2744 if (myaddr == 0) { 2745 /* 2746 * I don't have an assigned address, so i need to 2747 * negotiate my address. 2748 */ 2749 sp->ipcp.flags |= IPCP_MYADDR_DYN; 2750 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2751 } 2752 if (hisaddr == 1) { 2753 /* 2754 * XXX - remove this hack! 2755 * remote has no valid adress, we need to get one assigned. 2756 */ 2757 sp->ipcp.flags |= IPCP_HISADDR_DYN; 2758 } 2759 sppp_open_event(&ipcp, sp); 2760 } 2761 2762 static void 2763 sppp_ipcp_close(struct sppp *sp) 2764 { 2765 sppp_close_event(&ipcp, sp); 2766 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 2767 /* 2768 * Some address was dynamic, clear it again. 2769 */ 2770 sppp_clear_ip_addrs(sp); 2771 } 2772 2773 static void 2774 sppp_ipcp_TO(void *cookie) 2775 { 2776 sppp_to_event(&ipcp, (struct sppp *)cookie); 2777 } 2778 2779 /* 2780 * Analyze a configure request. Return true if it was agreeable, and 2781 * caused action sca, false if it has been rejected or nak'ed, and 2782 * caused action scn. (The return value is used to make the state 2783 * transition decision in the state automaton.) 2784 */ 2785 static int 2786 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2787 { 2788 u_char *buf, *r, *p; 2789 struct ifnet *ifp = &sp->pp_if; 2790 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 2791 u_int32_t hisaddr, desiredaddr; 2792 2793 len -= 4; 2794 origlen = len; 2795 /* 2796 * Make sure to allocate a buf that can at least hold a 2797 * conf-nak with an `address' option. We might need it below. 2798 */ 2799 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 2800 if (! buf) 2801 return (0); 2802 2803 /* pass 1: see if we can recognize them */ 2804 if (debug) 2805 log(LOG_DEBUG, SPP_FMT "ipcp parse opts:", 2806 SPP_ARGS(ifp)); 2807 p = (void*) (h+1); 2808 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2809 if (debug) 2810 addlog(" %s", sppp_ipcp_opt_name(*p)); 2811 switch (*p) { 2812 #ifdef notyet 2813 case IPCP_OPT_COMPRESSION: 2814 if (len >= 6 && p[1] >= 6) { 2815 /* correctly formed compress option */ 2816 continue; 2817 } 2818 if (debug) 2819 addlog(" [invalid]"); 2820 break; 2821 #endif 2822 case IPCP_OPT_ADDRESS: 2823 if (len >= 6 && p[1] == 6) { 2824 /* correctly formed address option */ 2825 continue; 2826 } 2827 if (debug) 2828 addlog(" [invalid]"); 2829 break; 2830 default: 2831 /* Others not supported. */ 2832 if (debug) 2833 addlog(" [rej]"); 2834 break; 2835 } 2836 /* Add the option to rejected list. */ 2837 bcopy (p, r, p[1]); 2838 r += p[1]; 2839 rlen += p[1]; 2840 } 2841 if (rlen) { 2842 if (debug) 2843 addlog(" send conf-rej\n"); 2844 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 2845 goto end; 2846 } else if (debug) 2847 addlog("\n"); 2848 2849 /* pass 2: parse option values */ 2850 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 2851 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 2852 else 2853 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 2854 if (debug) 2855 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ", 2856 SPP_ARGS(ifp)); 2857 p = (void*) (h+1); 2858 len = origlen; 2859 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2860 if (debug) 2861 addlog(" %s", sppp_ipcp_opt_name(*p)); 2862 switch (*p) { 2863 #ifdef notyet 2864 case IPCP_OPT_COMPRESSION: 2865 continue; 2866 #endif 2867 case IPCP_OPT_ADDRESS: 2868 desiredaddr = p[2] << 24 | p[3] << 16 | 2869 p[4] << 8 | p[5]; 2870 if (desiredaddr == hisaddr || 2871 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 2872 /* 2873 * Peer's address is same as our value, 2874 * this is agreeable. Gonna conf-ack 2875 * it. 2876 */ 2877 if (debug) 2878 addlog(" %s [ack]", 2879 sppp_dotted_quad(hisaddr)); 2880 /* record that we've seen it already */ 2881 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 2882 sp->ipcp.req_hisaddr = desiredaddr; 2883 hisaddr = desiredaddr; 2884 continue; 2885 } 2886 /* 2887 * The address wasn't agreeable. This is either 2888 * he sent us 0.0.0.0, asking to assign him an 2889 * address, or he send us another address not 2890 * matching our value. Either case, we gonna 2891 * conf-nak it with our value. 2892 */ 2893 if (debug) { 2894 if (desiredaddr == 0) 2895 addlog(" [addr requested]"); 2896 else 2897 addlog(" %s [not agreed]", 2898 sppp_dotted_quad(desiredaddr)); 2899 } 2900 2901 p[2] = hisaddr >> 24; 2902 p[3] = hisaddr >> 16; 2903 p[4] = hisaddr >> 8; 2904 p[5] = hisaddr; 2905 break; 2906 } 2907 /* Add the option to nak'ed list. */ 2908 bcopy (p, r, p[1]); 2909 r += p[1]; 2910 rlen += p[1]; 2911 } 2912 2913 /* 2914 * If we are about to conf-ack the request, but haven't seen 2915 * his address so far, gonna conf-nak it instead, with the 2916 * `address' option present and our idea of his address being 2917 * filled in there, to request negotiation of both addresses. 2918 * 2919 * XXX This can result in an endless req - nak loop if peer 2920 * doesn't want to send us his address. Q: What should we do 2921 * about it? XXX A: implement the max-failure counter. 2922 */ 2923 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 2924 buf[0] = IPCP_OPT_ADDRESS; 2925 buf[1] = 6; 2926 buf[2] = hisaddr >> 24; 2927 buf[3] = hisaddr >> 16; 2928 buf[4] = hisaddr >> 8; 2929 buf[5] = hisaddr; 2930 rlen = 6; 2931 if (debug) 2932 addlog(" still need hisaddr"); 2933 } 2934 2935 if (rlen) { 2936 if (debug) 2937 addlog(" send conf-nak\n"); 2938 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 2939 } else { 2940 if (debug) 2941 addlog(" send conf-ack\n"); 2942 sppp_cp_send (sp, PPP_IPCP, CONF_ACK, 2943 h->ident, origlen, h+1); 2944 } 2945 2946 end: 2947 free (buf, M_TEMP); 2948 return (rlen == 0); 2949 } 2950 2951 /* 2952 * Analyze the IPCP Configure-Reject option list, and adjust our 2953 * negotiation. 2954 */ 2955 static void 2956 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2957 { 2958 u_char *buf, *p; 2959 struct ifnet *ifp = &sp->pp_if; 2960 int debug = ifp->if_flags & IFF_DEBUG; 2961 2962 len -= 4; 2963 buf = malloc (len, M_TEMP, M_NOWAIT); 2964 if (!buf) 2965 return; 2966 2967 if (debug) 2968 log(LOG_DEBUG, SPP_FMT "ipcp rej opts:", 2969 SPP_ARGS(ifp)); 2970 2971 p = (void*) (h+1); 2972 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2973 if (debug) 2974 addlog(" %s", sppp_ipcp_opt_name(*p)); 2975 switch (*p) { 2976 case IPCP_OPT_ADDRESS: 2977 /* 2978 * Peer doesn't grok address option. This is 2979 * bad. XXX Should we better give up here? 2980 */ 2981 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 2982 break; 2983 #ifdef notyet 2984 case IPCP_OPT_COMPRESS: 2985 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 2986 break; 2987 #endif 2988 } 2989 } 2990 if (debug) 2991 addlog("\n"); 2992 free (buf, M_TEMP); 2993 return; 2994 } 2995 2996 /* 2997 * Analyze the IPCP Configure-NAK option list, and adjust our 2998 * negotiation. 2999 */ 3000 static void 3001 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3002 { 3003 u_char *p; 3004 struct ifnet *ifp = &sp->pp_if; 3005 int debug = ifp->if_flags & IFF_DEBUG; 3006 u_int32_t wantaddr; 3007 3008 len -= 4; 3009 3010 if (debug) 3011 log(LOG_DEBUG, SPP_FMT "ipcp nak opts:", 3012 SPP_ARGS(ifp)); 3013 3014 p = (void*) (h+1); 3015 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3016 if (debug) 3017 addlog(" %s", sppp_ipcp_opt_name(*p)); 3018 switch (*p) { 3019 case IPCP_OPT_ADDRESS: 3020 /* 3021 * Peer doesn't like our local IP address. See 3022 * if we can do something for him. We'll drop 3023 * him our address then. 3024 */ 3025 if (len >= 6 && p[1] == 6) { 3026 wantaddr = p[2] << 24 | p[3] << 16 | 3027 p[4] << 8 | p[5]; 3028 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3029 if (debug) 3030 addlog(" [wantaddr %s]", 3031 sppp_dotted_quad(wantaddr)); 3032 /* 3033 * When doing dynamic address assignment, 3034 * we accept his offer. Otherwise, we 3035 * ignore it and thus continue to negotiate 3036 * our already existing value. 3037 */ 3038 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3039 if (debug) 3040 addlog(" [agree]"); 3041 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3042 sp->ipcp.req_myaddr = wantaddr; 3043 } 3044 } 3045 break; 3046 3047 case IPCP_OPT_PRIMDNS: 3048 if (len >= 6 && p[1] == 6) { 3049 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3050 p[4] << 8 | p[5]; 3051 } 3052 break; 3053 3054 case IPCP_OPT_SECDNS: 3055 if (len >= 6 && p[1] == 6) { 3056 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3057 p[4] << 8 | p[5]; 3058 } 3059 break; 3060 #ifdef notyet 3061 case IPCP_OPT_COMPRESS: 3062 /* 3063 * Peer wants different compression parameters. 3064 */ 3065 break; 3066 #endif 3067 } 3068 } 3069 if (debug) 3070 addlog("\n"); 3071 return; 3072 } 3073 3074 static void 3075 sppp_ipcp_tlu(struct sppp *sp) 3076 { 3077 /* we are up. Set addresses and notify anyone interested */ 3078 u_int32_t myaddr, hisaddr; 3079 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3080 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 3081 myaddr = sp->ipcp.req_myaddr; 3082 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 3083 hisaddr = sp->ipcp.req_hisaddr; 3084 sppp_set_ip_addrs(sp, myaddr, hisaddr); 3085 if (sp->pp_con) 3086 sp->pp_con(sp); 3087 } 3088 3089 static void 3090 sppp_ipcp_tld(struct sppp *sp) 3091 { 3092 } 3093 3094 static void 3095 sppp_ipcp_tls(struct sppp *sp) 3096 { 3097 /* indicate to LCP that it must stay alive */ 3098 sp->lcp.protos |= (1 << IDX_IPCP); 3099 } 3100 3101 static void 3102 sppp_ipcp_tlf(struct sppp *sp) 3103 { 3104 /* we no longer need LCP */ 3105 sp->lcp.protos &= ~(1 << IDX_IPCP); 3106 } 3107 3108 static void 3109 sppp_ipcp_scr(struct sppp *sp) 3110 { 3111 char opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3112 u_int32_t ouraddr; 3113 int i = 0; 3114 3115 #ifdef notyet 3116 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3117 opt[i++] = IPCP_OPT_COMPRESSION; 3118 opt[i++] = 6; 3119 opt[i++] = 0; /* VJ header compression */ 3120 opt[i++] = 0x2d; /* VJ header compression */ 3121 opt[i++] = max_slot_id; 3122 opt[i++] = comp_slot_id; 3123 } 3124 #endif 3125 3126 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3127 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3128 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3129 else 3130 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3131 opt[i++] = IPCP_OPT_ADDRESS; 3132 opt[i++] = 6; 3133 opt[i++] = ouraddr >> 24; 3134 opt[i++] = ouraddr >> 16; 3135 opt[i++] = ouraddr >> 8; 3136 opt[i++] = ouraddr; 3137 } 3138 3139 if (sp->query_dns & 1) { 3140 opt[i++] = IPCP_OPT_PRIMDNS; 3141 opt[i++] = 6; 3142 opt[i++] = sp->dns_addrs[0] >> 24; 3143 opt[i++] = sp->dns_addrs[0] >> 16; 3144 opt[i++] = sp->dns_addrs[0] >> 8; 3145 opt[i++] = sp->dns_addrs[0]; 3146 } 3147 if (sp->query_dns & 2) { 3148 opt[i++] = IPCP_OPT_SECDNS; 3149 opt[i++] = 6; 3150 opt[i++] = sp->dns_addrs[1] >> 24; 3151 opt[i++] = sp->dns_addrs[1] >> 16; 3152 opt[i++] = sp->dns_addrs[1] >> 8; 3153 opt[i++] = sp->dns_addrs[1]; 3154 } 3155 3156 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3157 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3158 } 3159 3160 3161 /* 3162 *--------------------------------------------------------------------------* 3163 * * 3164 * The IPv6CP implementation. * 3165 * * 3166 *--------------------------------------------------------------------------* 3167 */ 3168 3169 #ifdef INET6 3170 static void 3171 sppp_ipv6cp_init(struct sppp *sp) 3172 { 3173 sp->ipv6cp.opts = 0; 3174 sp->ipv6cp.flags = 0; 3175 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3176 sp->fail_counter[IDX_IPV6CP] = 0; 3177 sp->pp_seq[IDX_IPV6CP] = 0; 3178 sp->pp_rseq[IDX_IPV6CP] = 0; 3179 callout_init(&sp->ch[IDX_IPV6CP]); 3180 } 3181 3182 static void 3183 sppp_ipv6cp_up(struct sppp *sp) 3184 { 3185 sppp_up_event(&ipv6cp, sp); 3186 } 3187 3188 static void 3189 sppp_ipv6cp_down(struct sppp *sp) 3190 { 3191 sppp_down_event(&ipv6cp, sp); 3192 } 3193 3194 static void 3195 sppp_ipv6cp_open(struct sppp *sp) 3196 { 3197 STDDCL; 3198 struct in6_addr myaddr, hisaddr; 3199 3200 #ifdef IPV6CP_MYIFID_DYN 3201 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3202 #else 3203 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3204 #endif 3205 3206 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3207 /* 3208 * If we don't have our address, this probably means our 3209 * interface doesn't want to talk IPv6 at all. (This could 3210 * be the case if somebody wants to speak only IPX, for 3211 * example.) Don't open IPv6CP in this case. 3212 */ 3213 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3214 /* XXX this message should go away */ 3215 if (debug) 3216 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n", 3217 SPP_ARGS(ifp)); 3218 return; 3219 } 3220 3221 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3222 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3223 sppp_open_event(&ipv6cp, sp); 3224 } 3225 3226 static void 3227 sppp_ipv6cp_close(struct sppp *sp) 3228 { 3229 sppp_close_event(&ipv6cp, sp); 3230 } 3231 3232 static void 3233 sppp_ipv6cp_TO(void *cookie) 3234 { 3235 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3236 } 3237 3238 /* 3239 * Analyze a configure request. Return true if it was agreeable, and 3240 * caused action sca, false if it has been rejected or nak'ed, and 3241 * caused action scn. (The return value is used to make the state 3242 * transition decision in the state automaton.) 3243 */ 3244 static int 3245 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3246 { 3247 u_char *buf, *r, *p; 3248 struct ifnet *ifp = &sp->pp_if; 3249 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3250 struct in6_addr myaddr, desiredaddr, suggestaddr; 3251 int ifidcount; 3252 int type; 3253 int collision, nohisaddr; 3254 3255 len -= 4; 3256 origlen = len; 3257 /* 3258 * Make sure to allocate a buf that can at least hold a 3259 * conf-nak with an `address' option. We might need it below. 3260 */ 3261 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 3262 if (! buf) 3263 return (0); 3264 3265 /* pass 1: see if we can recognize them */ 3266 if (debug) 3267 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:", 3268 SPP_ARGS(ifp)); 3269 p = (void*) (h+1); 3270 ifidcount = 0; 3271 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3272 if (debug) 3273 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3274 switch (*p) { 3275 case IPV6CP_OPT_IFID: 3276 if (len >= 10 && p[1] == 10 && ifidcount == 0) { 3277 /* correctly formed address option */ 3278 ifidcount++; 3279 continue; 3280 } 3281 if (debug) 3282 addlog(" [invalid]"); 3283 break; 3284 #ifdef notyet 3285 case IPV6CP_OPT_COMPRESSION: 3286 if (len >= 4 && p[1] >= 4) { 3287 /* correctly formed compress option */ 3288 continue; 3289 } 3290 if (debug) 3291 addlog(" [invalid]"); 3292 break; 3293 #endif 3294 default: 3295 /* Others not supported. */ 3296 if (debug) 3297 addlog(" [rej]"); 3298 break; 3299 } 3300 /* Add the option to rejected list. */ 3301 bcopy (p, r, p[1]); 3302 r += p[1]; 3303 rlen += p[1]; 3304 } 3305 if (rlen) { 3306 if (debug) 3307 addlog(" send conf-rej\n"); 3308 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3309 goto end; 3310 } else if (debug) 3311 addlog("\n"); 3312 3313 /* pass 2: parse option values */ 3314 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3315 if (debug) 3316 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ", 3317 SPP_ARGS(ifp)); 3318 p = (void*) (h+1); 3319 len = origlen; 3320 type = CONF_ACK; 3321 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3322 if (debug) 3323 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3324 switch (*p) { 3325 #ifdef notyet 3326 case IPV6CP_OPT_COMPRESSION: 3327 continue; 3328 #endif 3329 case IPV6CP_OPT_IFID: 3330 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3331 bcopy(&p[2], &desiredaddr.s6_addr[8], 8); 3332 collision = (memcmp(&desiredaddr.s6_addr[8], 3333 &myaddr.s6_addr[8], 8) == 0); 3334 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3335 3336 desiredaddr.s6_addr16[0] = htons(0xfe80); 3337 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3338 3339 if (!collision && !nohisaddr) { 3340 /* no collision, hisaddr known - Conf-Ack */ 3341 type = CONF_ACK; 3342 3343 if (debug) { 3344 addlog(" %s [%s]", 3345 ip6_sprintf(&desiredaddr), 3346 sppp_cp_type_name(type)); 3347 } 3348 continue; 3349 } 3350 3351 memset(&suggestaddr, 0, sizeof(&suggestaddr)); 3352 if (collision && nohisaddr) { 3353 /* collision, hisaddr unknown - Conf-Rej */ 3354 type = CONF_REJ; 3355 memset(&p[2], 0, 8); 3356 } else { 3357 /* 3358 * - no collision, hisaddr unknown, or 3359 * - collision, hisaddr known 3360 * Conf-Nak, suggest hisaddr 3361 */ 3362 type = CONF_NAK; 3363 sppp_suggest_ip6_addr(sp, &suggestaddr); 3364 bcopy(&suggestaddr.s6_addr[8], &p[2], 8); 3365 } 3366 if (debug) 3367 addlog(" %s [%s]", ip6_sprintf(&desiredaddr), 3368 sppp_cp_type_name(type)); 3369 break; 3370 } 3371 /* Add the option to nak'ed list. */ 3372 bcopy (p, r, p[1]); 3373 r += p[1]; 3374 rlen += p[1]; 3375 } 3376 3377 if (rlen == 0 && type == CONF_ACK) { 3378 if (debug) 3379 addlog(" send %s\n", sppp_cp_type_name(type)); 3380 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1); 3381 } else { 3382 #ifdef notdef 3383 if (type == CONF_ACK) 3384 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3385 #endif 3386 3387 if (debug) { 3388 addlog(" send %s suggest %s\n", 3389 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); 3390 } 3391 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3392 } 3393 3394 end: 3395 free (buf, M_TEMP); 3396 return (rlen == 0); 3397 } 3398 3399 /* 3400 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3401 * negotiation. 3402 */ 3403 static void 3404 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3405 { 3406 u_char *buf, *p; 3407 struct ifnet *ifp = &sp->pp_if; 3408 int debug = ifp->if_flags & IFF_DEBUG; 3409 3410 len -= 4; 3411 buf = malloc (len, M_TEMP, M_NOWAIT); 3412 if (!buf) 3413 return; 3414 3415 if (debug) 3416 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:", 3417 SPP_ARGS(ifp)); 3418 3419 p = (void*) (h+1); 3420 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3421 if (debug) 3422 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3423 switch (*p) { 3424 case IPV6CP_OPT_IFID: 3425 /* 3426 * Peer doesn't grok address option. This is 3427 * bad. XXX Should we better give up here? 3428 */ 3429 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3430 break; 3431 #ifdef notyet 3432 case IPV6CP_OPT_COMPRESS: 3433 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3434 break; 3435 #endif 3436 } 3437 } 3438 if (debug) 3439 addlog("\n"); 3440 free (buf, M_TEMP); 3441 return; 3442 } 3443 3444 /* 3445 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3446 * negotiation. 3447 */ 3448 static void 3449 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3450 { 3451 u_char *buf, *p; 3452 struct ifnet *ifp = &sp->pp_if; 3453 int debug = ifp->if_flags & IFF_DEBUG; 3454 struct in6_addr suggestaddr; 3455 3456 len -= 4; 3457 buf = malloc (len, M_TEMP, M_NOWAIT); 3458 if (!buf) 3459 return; 3460 3461 if (debug) 3462 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:", 3463 SPP_ARGS(ifp)); 3464 3465 p = (void*) (h+1); 3466 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3467 if (debug) 3468 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3469 switch (*p) { 3470 case IPV6CP_OPT_IFID: 3471 /* 3472 * Peer doesn't like our local ifid. See 3473 * if we can do something for him. We'll drop 3474 * him our address then. 3475 */ 3476 if (len < 10 || p[1] != 10) 3477 break; 3478 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3479 suggestaddr.s6_addr16[0] = htons(0xfe80); 3480 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3481 bcopy(&p[2], &suggestaddr.s6_addr[8], 8); 3482 3483 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3484 if (debug) 3485 addlog(" [suggestaddr %s]", 3486 ip6_sprintf(&suggestaddr)); 3487 #ifdef IPV6CP_MYIFID_DYN 3488 /* 3489 * When doing dynamic address assignment, 3490 * we accept his offer. 3491 */ 3492 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3493 struct in6_addr lastsuggest; 3494 /* 3495 * If <suggested myaddr from peer> equals to 3496 * <hisaddr we have suggested last time>, 3497 * we have a collision. generate new random 3498 * ifid. 3499 */ 3500 sppp_suggest_ip6_addr(&lastsuggest); 3501 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3502 lastsuggest)) { 3503 if (debug) 3504 addlog(" [random]"); 3505 sppp_gen_ip6_addr(sp, &suggestaddr); 3506 } 3507 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3508 if (debug) 3509 addlog(" [agree]"); 3510 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3511 } 3512 #else 3513 /* 3514 * Since we do not do dynamic address assignment, 3515 * we ignore it and thus continue to negotiate 3516 * our already existing value. This can possibly 3517 * go into infinite request-reject loop. 3518 * 3519 * This is not likely because we normally use 3520 * ifid based on MAC-address. 3521 * If you have no ethernet card on the node, too bad. 3522 * XXX should we use fail_counter? 3523 */ 3524 #endif 3525 break; 3526 #ifdef notyet 3527 case IPV6CP_OPT_COMPRESS: 3528 /* 3529 * Peer wants different compression parameters. 3530 */ 3531 break; 3532 #endif 3533 } 3534 } 3535 if (debug) 3536 addlog("\n"); 3537 free (buf, M_TEMP); 3538 return; 3539 } 3540 3541 static void 3542 sppp_ipv6cp_tlu(struct sppp *sp) 3543 { 3544 /* we are up - notify isdn daemon */ 3545 if (sp->pp_con) 3546 sp->pp_con(sp); 3547 } 3548 3549 static void 3550 sppp_ipv6cp_tld(struct sppp *sp) 3551 { 3552 } 3553 3554 static void 3555 sppp_ipv6cp_tls(struct sppp *sp) 3556 { 3557 /* indicate to LCP that it must stay alive */ 3558 sp->lcp.protos |= (1 << IDX_IPV6CP); 3559 } 3560 3561 static void 3562 sppp_ipv6cp_tlf(struct sppp *sp) 3563 { 3564 /* we no longer need LCP */ 3565 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3566 } 3567 3568 static void 3569 sppp_ipv6cp_scr(struct sppp *sp) 3570 { 3571 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3572 struct in6_addr ouraddr; 3573 int i = 0; 3574 3575 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3576 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3577 opt[i++] = IPV6CP_OPT_IFID; 3578 opt[i++] = 10; 3579 bcopy(&ouraddr.s6_addr[8], &opt[i], 8); 3580 i += 8; 3581 } 3582 3583 #ifdef notyet 3584 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3585 opt[i++] = IPV6CP_OPT_COMPRESSION; 3586 opt[i++] = 4; 3587 opt[i++] = 0; /* TBD */ 3588 opt[i++] = 0; /* TBD */ 3589 /* variable length data may follow */ 3590 } 3591 #endif 3592 3593 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3594 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 3595 } 3596 #else /*INET6*/ 3597 static void sppp_ipv6cp_init(struct sppp *sp) 3598 { 3599 } 3600 3601 static void sppp_ipv6cp_up(struct sppp *sp) 3602 { 3603 } 3604 3605 static void sppp_ipv6cp_down(struct sppp *sp) 3606 { 3607 } 3608 3609 3610 static void sppp_ipv6cp_open(struct sppp *sp) 3611 { 3612 } 3613 3614 static void sppp_ipv6cp_close(struct sppp *sp) 3615 { 3616 } 3617 3618 static void sppp_ipv6cp_TO(void *sp) 3619 { 3620 } 3621 3622 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3623 { 3624 return 0; 3625 } 3626 3627 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3628 { 3629 } 3630 3631 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3632 { 3633 } 3634 3635 static void sppp_ipv6cp_tlu(struct sppp *sp) 3636 { 3637 } 3638 3639 static void sppp_ipv6cp_tld(struct sppp *sp) 3640 { 3641 } 3642 3643 static void sppp_ipv6cp_tls(struct sppp *sp) 3644 { 3645 } 3646 3647 static void sppp_ipv6cp_tlf(struct sppp *sp) 3648 { 3649 } 3650 3651 static void sppp_ipv6cp_scr(struct sppp *sp) 3652 { 3653 } 3654 #endif /*INET6*/ 3655 3656 3657 /* 3658 *--------------------------------------------------------------------------* 3659 * * 3660 * The CHAP implementation. * 3661 * * 3662 *--------------------------------------------------------------------------* 3663 */ 3664 3665 /* 3666 * The authentication protocols don't employ a full-fledged state machine as 3667 * the control protocols do, since they do have Open and Close events, but 3668 * not Up and Down, nor are they explicitly terminated. Also, use of the 3669 * authentication protocols may be different in both directions (this makes 3670 * sense, think of a machine that never accepts incoming calls but only 3671 * calls out, it doesn't require the called party to authenticate itself). 3672 * 3673 * Our state machine for the local authentication protocol (we are requesting 3674 * the peer to authenticate) looks like: 3675 * 3676 * RCA- 3677 * +--------------------------------------------+ 3678 * V scn,tld| 3679 * +--------+ Close +---------+ RCA+ 3680 * | |<----------------------------------| |------+ 3681 * +--->| Closed | TO* | Opened | sca | 3682 * | | |-----+ +-------| |<-----+ 3683 * | +--------+ irc | | +---------+ 3684 * | ^ | | ^ 3685 * | | | | | 3686 * | | | | | 3687 * | TO-| | | | 3688 * | |tld TO+ V | | 3689 * | | +------->+ | | 3690 * | | | | | | 3691 * | +--------+ V | | 3692 * | | |<----+<--------------------+ | 3693 * | | Req- | scr | 3694 * | | Sent | | 3695 * | | | | 3696 * | +--------+ | 3697 * | RCA- | | RCA+ | 3698 * +------+ +------------------------------------------+ 3699 * scn,tld sca,irc,ict,tlu 3700 * 3701 * 3702 * with: 3703 * 3704 * Open: LCP reached authentication phase 3705 * Close: LCP reached terminate phase 3706 * 3707 * RCA+: received reply (pap-req, chap-response), acceptable 3708 * RCN: received reply (pap-req, chap-response), not acceptable 3709 * TO+: timeout with restart counter >= 0 3710 * TO-: timeout with restart counter < 0 3711 * TO*: reschedule timeout for CHAP 3712 * 3713 * scr: send request packet (none for PAP, chap-challenge) 3714 * sca: send ack packet (pap-ack, chap-success) 3715 * scn: send nak packet (pap-nak, chap-failure) 3716 * ict: initialize re-challenge timer (CHAP only) 3717 * 3718 * tlu: this-layer-up, LCP reaches network phase 3719 * tld: this-layer-down, LCP enters terminate phase 3720 * 3721 * Note that in CHAP mode, after sending a new challenge, while the state 3722 * automaton falls back into Req-Sent state, it doesn't signal a tld 3723 * event to LCP, so LCP remains in network phase. Only after not getting 3724 * any response (or after getting an unacceptable response), CHAP closes, 3725 * causing LCP to enter terminate phase. 3726 * 3727 * With PAP, there is no initial request that can be sent. The peer is 3728 * expected to send one based on the successful negotiation of PAP as 3729 * the authentication protocol during the LCP option negotiation. 3730 * 3731 * Incoming authentication protocol requests (remote requests 3732 * authentication, we are peer) don't employ a state machine at all, 3733 * they are simply answered. Some peers [Ascend P50 firmware rev 3734 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 3735 * still in authentication phase (thereby violating the standard that 3736 * demands that these NCP packets are to be discarded), so we keep 3737 * track of the peer demanding us to authenticate, and only proceed to 3738 * phase network once we've seen a positive acknowledge for the 3739 * authentication. 3740 */ 3741 3742 /* 3743 * Handle incoming CHAP packets. 3744 */ 3745 void 3746 sppp_chap_input(struct sppp *sp, struct mbuf *m) 3747 { 3748 STDDCL; 3749 struct lcp_header *h; 3750 int len, x; 3751 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 3752 int value_len, name_len; 3753 MD5_CTX ctx; 3754 3755 len = m->m_pkthdr.len; 3756 if (len < 4) { 3757 if (debug) 3758 log(LOG_DEBUG, 3759 SPP_FMT "chap invalid packet length: %d bytes\n", 3760 SPP_ARGS(ifp), len); 3761 return; 3762 } 3763 h = mtod (m, struct lcp_header*); 3764 if (len > ntohs (h->len)) 3765 len = ntohs (h->len); 3766 3767 switch (h->type) { 3768 /* challenge, failure and success are his authproto */ 3769 case CHAP_CHALLENGE: 3770 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 3771 /* can't do anything usefull */ 3772 sp->pp_auth_failures++; 3773 printf(SPP_FMT "chap input without my name and my secret being set\n", 3774 SPP_ARGS(ifp)); 3775 break; 3776 } 3777 value = 1 + (u_char*)(h+1); 3778 value_len = value[-1]; 3779 name = value + value_len; 3780 name_len = len - value_len - 5; 3781 if (name_len < 0) { 3782 if (debug) { 3783 log(LOG_DEBUG, 3784 SPP_FMT "chap corrupted challenge " 3785 "<%s id=0x%x len=%d", 3786 SPP_ARGS(ifp), 3787 sppp_auth_type_name(PPP_CHAP, h->type), 3788 h->ident, ntohs(h->len)); 3789 if (len > 4) 3790 sppp_print_bytes((u_char*) (h+1), len-4); 3791 addlog(">\n"); 3792 } 3793 break; 3794 } 3795 3796 if (debug) { 3797 log(LOG_DEBUG, 3798 SPP_FMT "chap input <%s id=0x%x len=%d name=", 3799 SPP_ARGS(ifp), 3800 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 3801 ntohs(h->len)); 3802 sppp_print_string((char*) name, name_len); 3803 addlog(" value-size=%d value=", value_len); 3804 sppp_print_bytes(value, value_len); 3805 addlog(">\n"); 3806 } 3807 3808 /* Compute reply value. */ 3809 MD5Init(&ctx); 3810 MD5Update(&ctx, &h->ident, 1); 3811 MD5Update(&ctx, sp->myauth.secret, strlen(sp->myauth.secret)); 3812 MD5Update(&ctx, value, value_len); 3813 MD5Final(digest, &ctx); 3814 dsize = sizeof digest; 3815 3816 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 3817 sizeof dsize, (const char *)&dsize, 3818 sizeof digest, digest, 3819 strlen(sp->myauth.name), 3820 sp->myauth.name, 3821 0); 3822 break; 3823 3824 case CHAP_SUCCESS: 3825 if (debug) { 3826 log(LOG_DEBUG, SPP_FMT "chap success", 3827 SPP_ARGS(ifp)); 3828 if (len > 4) { 3829 addlog(": "); 3830 sppp_print_string((char*)(h + 1), len - 4); 3831 } 3832 addlog("\n"); 3833 } 3834 x = splnet(); 3835 sp->pp_auth_failures = 0; 3836 sp->pp_flags &= ~PP_NEEDAUTH; 3837 if (sp->myauth.proto == PPP_CHAP && 3838 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 3839 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 3840 /* 3841 * We are authenticator for CHAP but didn't 3842 * complete yet. Leave it to tlu to proceed 3843 * to network phase. 3844 */ 3845 splx(x); 3846 break; 3847 } 3848 splx(x); 3849 sppp_phase_network(sp); 3850 break; 3851 3852 case CHAP_FAILURE: 3853 x = splnet(); 3854 sp->pp_auth_failures++; 3855 splx(x); 3856 if (debug) { 3857 log(LOG_INFO, SPP_FMT "chap failure", 3858 SPP_ARGS(ifp)); 3859 if (len > 4) { 3860 addlog(": "); 3861 sppp_print_string((char*)(h + 1), len - 4); 3862 } 3863 addlog("\n"); 3864 } else 3865 log(LOG_INFO, SPP_FMT "chap failure\n", 3866 SPP_ARGS(ifp)); 3867 /* await LCP shutdown by authenticator */ 3868 break; 3869 3870 /* response is my authproto */ 3871 case CHAP_RESPONSE: 3872 if (sp->hisauth.secret == NULL) { 3873 /* can't do anything usefull */ 3874 printf(SPP_FMT "chap input without his secret being set\n", 3875 SPP_ARGS(ifp)); 3876 break; 3877 } 3878 value = 1 + (u_char*)(h+1); 3879 value_len = value[-1]; 3880 name = value + value_len; 3881 name_len = len - value_len - 5; 3882 if (name_len < 0) { 3883 if (debug) { 3884 log(LOG_DEBUG, 3885 SPP_FMT "chap corrupted response " 3886 "<%s id=0x%x len=%d", 3887 SPP_ARGS(ifp), 3888 sppp_auth_type_name(PPP_CHAP, h->type), 3889 h->ident, ntohs(h->len)); 3890 if (len > 4) 3891 sppp_print_bytes((u_char*)(h+1), len-4); 3892 addlog(">\n"); 3893 } 3894 break; 3895 } 3896 if (h->ident != sp->confid[IDX_CHAP]) { 3897 if (debug) 3898 log(LOG_DEBUG, 3899 SPP_FMT "chap dropping response for old ID " 3900 "(got %d, expected %d)\n", 3901 SPP_ARGS(ifp), 3902 h->ident, sp->confid[IDX_CHAP]); 3903 break; 3904 } 3905 if (sp->hisauth.name != NULL && 3906 (name_len != strlen(sp->hisauth.name) 3907 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 3908 log(LOG_INFO, SPP_FMT "chap response, his name ", 3909 SPP_ARGS(ifp)); 3910 sppp_print_string(name, name_len); 3911 addlog(" != expected "); 3912 sppp_print_string(sp->hisauth.name, 3913 strlen(sp->hisauth.name)); 3914 addlog("\n"); 3915 goto chap_failure; 3916 } 3917 if (debug) { 3918 log(LOG_DEBUG, SPP_FMT "chap input(%s) " 3919 "<%s id=0x%x len=%d name=", 3920 SPP_ARGS(ifp), 3921 sppp_state_name(sp->state[IDX_CHAP]), 3922 sppp_auth_type_name(PPP_CHAP, h->type), 3923 h->ident, ntohs (h->len)); 3924 sppp_print_string((char*)name, name_len); 3925 addlog(" value-size=%d value=", value_len); 3926 sppp_print_bytes(value, value_len); 3927 addlog(">\n"); 3928 } 3929 if (value_len != sizeof(sp->myauth.challenge)) { 3930 if (debug) 3931 log(LOG_DEBUG, 3932 SPP_FMT "chap bad hash value length: " 3933 "%d bytes, should be %ld\n", 3934 SPP_ARGS(ifp), value_len, 3935 (long) sizeof(sp->myauth.challenge)); 3936 goto chap_failure; 3937 } 3938 3939 MD5Init(&ctx); 3940 MD5Update(&ctx, &h->ident, 1); 3941 MD5Update(&ctx, sp->hisauth.secret, 3942 strlen(sp->hisauth.secret)); 3943 MD5Update(&ctx, sp->myauth.challenge, sizeof(sp->myauth.challenge)); 3944 MD5Final(digest, &ctx); 3945 3946 #define FAILMSG "Failed..." 3947 #define SUCCMSG "Welcome!" 3948 3949 if (value_len != sizeof digest || 3950 memcmp(digest, value, value_len) != 0) { 3951 chap_failure: 3952 /* action scn, tld */ 3953 x = splnet(); 3954 sp->pp_auth_failures++; 3955 splx(x); 3956 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 3957 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 3958 0); 3959 chap.tld(sp); 3960 break; 3961 } 3962 sp->pp_auth_failures = 0; 3963 /* action sca, perhaps tlu */ 3964 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 3965 sp->state[IDX_CHAP] == STATE_OPENED) 3966 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 3967 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 3968 0); 3969 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 3970 sppp_cp_change_state(&chap, sp, STATE_OPENED); 3971 chap.tlu(sp); 3972 } 3973 break; 3974 3975 default: 3976 /* Unknown CHAP packet type -- ignore. */ 3977 if (debug) { 3978 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) " 3979 "<0x%x id=0x%xh len=%d", 3980 SPP_ARGS(ifp), 3981 sppp_state_name(sp->state[IDX_CHAP]), 3982 h->type, h->ident, ntohs(h->len)); 3983 if (len > 4) 3984 sppp_print_bytes((u_char*)(h+1), len-4); 3985 addlog(">\n"); 3986 } 3987 break; 3988 3989 } 3990 } 3991 3992 static void 3993 sppp_chap_init(struct sppp *sp) 3994 { 3995 /* Chap doesn't have STATE_INITIAL at all. */ 3996 sp->state[IDX_CHAP] = STATE_CLOSED; 3997 sp->fail_counter[IDX_CHAP] = 0; 3998 sp->pp_seq[IDX_CHAP] = 0; 3999 sp->pp_rseq[IDX_CHAP] = 0; 4000 callout_init(&sp->ch[IDX_CHAP]); 4001 } 4002 4003 static void 4004 sppp_chap_open(struct sppp *sp) 4005 { 4006 if (sp->myauth.proto == PPP_CHAP && 4007 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4008 /* we are authenticator for CHAP, start it */ 4009 chap.scr(sp); 4010 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4011 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4012 } 4013 /* nothing to be done if we are peer, await a challenge */ 4014 } 4015 4016 static void 4017 sppp_chap_close(struct sppp *sp) 4018 { 4019 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4020 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4021 } 4022 4023 static void 4024 sppp_chap_TO(void *cookie) 4025 { 4026 struct sppp *sp = (struct sppp *)cookie; 4027 STDDCL; 4028 int s; 4029 4030 s = splnet(); 4031 if (debug) 4032 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n", 4033 SPP_ARGS(ifp), 4034 sppp_state_name(sp->state[IDX_CHAP]), 4035 sp->rst_counter[IDX_CHAP]); 4036 4037 if (--sp->rst_counter[IDX_CHAP] < 0) 4038 /* TO- event */ 4039 switch (sp->state[IDX_CHAP]) { 4040 case STATE_REQ_SENT: 4041 chap.tld(sp); 4042 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4043 break; 4044 } 4045 else 4046 /* TO+ (or TO*) event */ 4047 switch (sp->state[IDX_CHAP]) { 4048 case STATE_OPENED: 4049 /* TO* event */ 4050 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4051 /* fall through */ 4052 case STATE_REQ_SENT: 4053 chap.scr(sp); 4054 /* sppp_cp_change_state() will restart the timer */ 4055 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4056 break; 4057 } 4058 4059 splx(s); 4060 } 4061 4062 static void 4063 sppp_chap_tlu(struct sppp *sp) 4064 { 4065 STDDCL; 4066 int i, x; 4067 4068 i = 0; 4069 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4070 4071 /* 4072 * Some broken CHAP implementations (Conware CoNet, firmware 4073 * 4.0.?) don't want to re-authenticate their CHAP once the 4074 * initial challenge-response exchange has taken place. 4075 * Provide for an option to avoid rechallenges. 4076 */ 4077 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4078 /* 4079 * Compute the re-challenge timeout. This will yield 4080 * a number between 300 and 810 seconds. 4081 */ 4082 i = 300 + ((unsigned)(random() & 0xff00) >> 7); 4083 4084 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4085 } 4086 4087 if (debug) { 4088 log(LOG_DEBUG, 4089 SPP_FMT "chap %s, ", 4090 SPP_ARGS(ifp), 4091 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4092 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4093 addlog("next re-challenge in %d seconds\n", i); 4094 else 4095 addlog("re-challenging supressed\n"); 4096 } 4097 4098 x = splnet(); 4099 sp->pp_auth_failures = 0; 4100 /* indicate to LCP that we need to be closed down */ 4101 sp->lcp.protos |= (1 << IDX_CHAP); 4102 4103 if (sp->pp_flags & PP_NEEDAUTH) { 4104 /* 4105 * Remote is authenticator, but his auth proto didn't 4106 * complete yet. Defer the transition to network 4107 * phase. 4108 */ 4109 splx(x); 4110 return; 4111 } 4112 splx(x); 4113 4114 /* 4115 * If we are already in phase network, we are done here. This 4116 * is the case if this is a dummy tlu event after a re-challenge. 4117 */ 4118 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4119 sppp_phase_network(sp); 4120 } 4121 4122 static void 4123 sppp_chap_tld(struct sppp *sp) 4124 { 4125 STDDCL; 4126 4127 if (debug) 4128 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp)); 4129 callout_stop(&sp->ch[IDX_CHAP]); 4130 sp->lcp.protos &= ~(1 << IDX_CHAP); 4131 4132 lcp.Close(sp); 4133 } 4134 4135 static void 4136 sppp_chap_scr(struct sppp *sp) 4137 { 4138 struct timeval tv; 4139 u_int32_t *ch, seed; 4140 u_char clen; 4141 4142 if (sp->myauth.name == NULL) { 4143 /* can't do anything usefull */ 4144 printf(SPP_FMT "chap starting without my name being set\n", 4145 SPP_ARGS(&sp->pp_if)); 4146 return; 4147 } 4148 4149 /* Compute random challenge. */ 4150 ch = (u_int32_t *)sp->myauth.challenge; 4151 microtime(&tv); 4152 seed = tv.tv_sec ^ tv.tv_usec; 4153 ch[0] = seed ^ random(); 4154 ch[1] = seed ^ random(); 4155 ch[2] = seed ^ random(); 4156 ch[3] = seed ^ random(); 4157 clen = 16; /* 4 * sizeof(u_int32_t) */ 4158 4159 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4160 4161 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4162 sizeof clen, (const char *)&clen, 4163 sizeof(sp->myauth.challenge), sp->myauth.challenge, 4164 strlen(sp->myauth.name), 4165 sp->myauth.name, 4166 0); 4167 } 4168 4169 /* 4170 *--------------------------------------------------------------------------* 4171 * * 4172 * The PAP implementation. * 4173 * * 4174 *--------------------------------------------------------------------------* 4175 */ 4176 /* 4177 * For PAP, we need to keep a little state also if we are the peer, not the 4178 * authenticator. This is since we don't get a request to authenticate, but 4179 * have to repeatedly authenticate ourself until we got a response (or the 4180 * retry counter is expired). 4181 */ 4182 4183 /* 4184 * Handle incoming PAP packets. */ 4185 static void 4186 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4187 { 4188 STDDCL; 4189 struct lcp_header *h; 4190 int len, x; 4191 u_char mlen; 4192 char *name, *passwd; 4193 int name_len, passwd_len; 4194 4195 len = m->m_pkthdr.len; 4196 if (len < 5) { 4197 if (debug) 4198 log(LOG_DEBUG, 4199 SPP_FMT "pap invalid packet length: %d bytes\n", 4200 SPP_ARGS(ifp), len); 4201 return; 4202 } 4203 h = mtod (m, struct lcp_header*); 4204 if (len > ntohs (h->len)) 4205 len = ntohs (h->len); 4206 switch (h->type) { 4207 /* PAP request is my authproto */ 4208 case PAP_REQ: 4209 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4210 /* can't do anything usefull */ 4211 printf(SPP_FMT "pap request without his name and his secret being set\n", 4212 SPP_ARGS(ifp)); 4213 break; 4214 } 4215 name = 1 + (u_char*)(h+1); 4216 name_len = name[-1]; 4217 passwd = name + name_len + 1; 4218 if (name_len > len - 6 || 4219 (passwd_len = passwd[-1]) > len - 6 - name_len) { 4220 if (debug) { 4221 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4222 "<%s id=0x%x len=%d", 4223 SPP_ARGS(ifp), 4224 sppp_auth_type_name(PPP_PAP, h->type), 4225 h->ident, ntohs(h->len)); 4226 if (len > 4) 4227 sppp_print_bytes((u_char*)(h+1), len-4); 4228 addlog(">\n"); 4229 } 4230 break; 4231 } 4232 if (debug) { 4233 log(LOG_DEBUG, SPP_FMT "pap input(%s) " 4234 "<%s id=0x%x len=%d name=", 4235 SPP_ARGS(ifp), 4236 sppp_state_name(sp->state[IDX_PAP]), 4237 sppp_auth_type_name(PPP_PAP, h->type), 4238 h->ident, ntohs(h->len)); 4239 sppp_print_string((char*)name, name_len); 4240 addlog(" passwd="); 4241 sppp_print_string((char*)passwd, passwd_len); 4242 addlog(">\n"); 4243 } 4244 if (memcmp(name, sp->hisauth.name, name_len) != 0 || 4245 memcmp(passwd, sp->hisauth.secret, passwd_len) != 0) { 4246 /* action scn, tld */ 4247 sp->pp_auth_failures++; 4248 mlen = sizeof(FAILMSG) - 1; 4249 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4250 sizeof mlen, (const char *)&mlen, 4251 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 4252 0); 4253 pap.tld(sp); 4254 break; 4255 } 4256 /* action sca, perhaps tlu */ 4257 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4258 sp->state[IDX_PAP] == STATE_OPENED) { 4259 mlen = sizeof(SUCCMSG) - 1; 4260 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4261 sizeof mlen, (const char *)&mlen, 4262 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 4263 0); 4264 } 4265 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4266 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4267 pap.tlu(sp); 4268 } 4269 break; 4270 4271 /* ack and nak are his authproto */ 4272 case PAP_ACK: 4273 callout_stop(&sp->pap_my_to_ch); 4274 if (debug) { 4275 log(LOG_DEBUG, SPP_FMT "pap success", 4276 SPP_ARGS(ifp)); 4277 name_len = *(char *)h; 4278 if (len > 5 && name_len) { 4279 addlog(": "); 4280 sppp_print_string((char*)(h+1), name_len); 4281 } 4282 addlog("\n"); 4283 } 4284 x = splnet(); 4285 sp->pp_auth_failures = 0; 4286 sp->pp_flags &= ~PP_NEEDAUTH; 4287 if (sp->myauth.proto == PPP_PAP && 4288 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4289 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4290 /* 4291 * We are authenticator for PAP but didn't 4292 * complete yet. Leave it to tlu to proceed 4293 * to network phase. 4294 */ 4295 splx(x); 4296 break; 4297 } 4298 splx(x); 4299 sppp_phase_network(sp); 4300 break; 4301 4302 case PAP_NAK: 4303 callout_stop(&sp->pap_my_to_ch); 4304 sp->pp_auth_failures++; 4305 if (debug) { 4306 log(LOG_INFO, SPP_FMT "pap failure", 4307 SPP_ARGS(ifp)); 4308 name_len = *(char *)h; 4309 if (len > 5 && name_len) { 4310 addlog(": "); 4311 sppp_print_string((char*)(h+1), name_len); 4312 } 4313 addlog("\n"); 4314 } else 4315 log(LOG_INFO, SPP_FMT "pap failure\n", 4316 SPP_ARGS(ifp)); 4317 /* await LCP shutdown by authenticator */ 4318 break; 4319 4320 default: 4321 /* Unknown PAP packet type -- ignore. */ 4322 if (debug) { 4323 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4324 "<0x%x id=0x%x len=%d", 4325 SPP_ARGS(ifp), 4326 h->type, h->ident, ntohs(h->len)); 4327 if (len > 4) 4328 sppp_print_bytes((u_char*)(h+1), len-4); 4329 addlog(">\n"); 4330 } 4331 break; 4332 4333 } 4334 } 4335 4336 static void 4337 sppp_pap_init(struct sppp *sp) 4338 { 4339 /* PAP doesn't have STATE_INITIAL at all. */ 4340 sp->state[IDX_PAP] = STATE_CLOSED; 4341 sp->fail_counter[IDX_PAP] = 0; 4342 sp->pp_seq[IDX_PAP] = 0; 4343 sp->pp_rseq[IDX_PAP] = 0; 4344 callout_init(&sp->ch[IDX_PAP]); 4345 callout_init(&sp->pap_my_to_ch); 4346 } 4347 4348 static void 4349 sppp_pap_open(struct sppp *sp) 4350 { 4351 if (sp->hisauth.proto == PPP_PAP && 4352 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4353 /* we are authenticator for PAP, start our timer */ 4354 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4355 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4356 } 4357 if (sp->myauth.proto == PPP_PAP) { 4358 /* we are peer, send a request, and start a timer */ 4359 pap.scr(sp); 4360 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4361 sppp_pap_my_TO, sp); 4362 } 4363 } 4364 4365 static void 4366 sppp_pap_close(struct sppp *sp) 4367 { 4368 if (sp->state[IDX_PAP] != STATE_CLOSED) 4369 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4370 } 4371 4372 /* 4373 * That's the timeout routine if we are authenticator. Since the 4374 * authenticator is basically passive in PAP, we can't do much here. 4375 */ 4376 static void 4377 sppp_pap_TO(void *cookie) 4378 { 4379 struct sppp *sp = (struct sppp *)cookie; 4380 STDDCL; 4381 int s; 4382 4383 s = splnet(); 4384 if (debug) 4385 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n", 4386 SPP_ARGS(ifp), 4387 sppp_state_name(sp->state[IDX_PAP]), 4388 sp->rst_counter[IDX_PAP]); 4389 4390 if (--sp->rst_counter[IDX_PAP] < 0) 4391 /* TO- event */ 4392 switch (sp->state[IDX_PAP]) { 4393 case STATE_REQ_SENT: 4394 pap.tld(sp); 4395 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4396 break; 4397 } 4398 else 4399 /* TO+ event, not very much we could do */ 4400 switch (sp->state[IDX_PAP]) { 4401 case STATE_REQ_SENT: 4402 /* sppp_cp_change_state() will restart the timer */ 4403 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4404 break; 4405 } 4406 4407 splx(s); 4408 } 4409 4410 /* 4411 * That's the timeout handler if we are peer. Since the peer is active, 4412 * we need to retransmit our PAP request since it is apparently lost. 4413 * XXX We should impose a max counter. 4414 */ 4415 static void 4416 sppp_pap_my_TO(void *cookie) 4417 { 4418 struct sppp *sp = (struct sppp *)cookie; 4419 STDDCL; 4420 4421 if (debug) 4422 log(LOG_DEBUG, SPP_FMT "pap peer TO\n", 4423 SPP_ARGS(ifp)); 4424 4425 pap.scr(sp); 4426 } 4427 4428 static void 4429 sppp_pap_tlu(struct sppp *sp) 4430 { 4431 STDDCL; 4432 int x; 4433 4434 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4435 4436 if (debug) 4437 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 4438 SPP_ARGS(ifp), pap.name); 4439 4440 x = splnet(); 4441 sp->pp_auth_failures = 0; 4442 /* indicate to LCP that we need to be closed down */ 4443 sp->lcp.protos |= (1 << IDX_PAP); 4444 4445 if (sp->pp_flags & PP_NEEDAUTH) { 4446 /* 4447 * Remote is authenticator, but his auth proto didn't 4448 * complete yet. Defer the transition to network 4449 * phase. 4450 */ 4451 splx(x); 4452 return; 4453 } 4454 splx(x); 4455 sppp_phase_network(sp); 4456 } 4457 4458 static void 4459 sppp_pap_tld(struct sppp *sp) 4460 { 4461 STDDCL; 4462 4463 if (debug) 4464 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp)); 4465 callout_stop(&sp->ch[IDX_PAP]); 4466 callout_stop(&sp->pap_my_to_ch); 4467 sp->lcp.protos &= ~(1 << IDX_PAP); 4468 4469 lcp.Close(sp); 4470 } 4471 4472 static void 4473 sppp_pap_scr(struct sppp *sp) 4474 { 4475 u_char idlen, pwdlen; 4476 4477 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4478 /* can't do anything usefull */ 4479 printf(SPP_FMT "pap starting without my name and secret being set\n", 4480 SPP_ARGS(&sp->pp_if)); 4481 return; 4482 } 4483 4484 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4485 pwdlen = strlen(sp->myauth.secret); 4486 idlen = strlen(sp->myauth.name); 4487 4488 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4489 sizeof idlen, (const char *)&idlen, 4490 idlen, sp->myauth.name, 4491 sizeof pwdlen, (const char *)&pwdlen, 4492 pwdlen, sp->myauth.secret, 4493 0); 4494 } 4495 4496 /* 4497 * Random miscellaneous functions. 4498 */ 4499 4500 /* 4501 * Send a PAP or CHAP proto packet. 4502 * 4503 * Varadic function, each of the elements for the ellipsis is of type 4504 * ``size_t mlen, const u_char *msg''. Processing will stop iff 4505 * mlen == 0. 4506 * NOTE: never declare variadic functions with types subject to type 4507 * promotion (i.e. u_char). This is asking for big trouble depending 4508 * on the architecture you are on... 4509 */ 4510 4511 static void 4512 sppp_auth_send(const struct cp *cp, struct sppp *sp, 4513 unsigned int type, unsigned int id, 4514 ...) 4515 { 4516 STDDCL; 4517 struct lcp_header *lh; 4518 struct mbuf *m; 4519 u_char *p; 4520 int len; 4521 size_t pkthdrlen; 4522 unsigned int mlen; 4523 const char *msg; 4524 va_list ap; 4525 4526 MGETHDR (m, M_DONTWAIT, MT_DATA); 4527 if (! m) 4528 return; 4529 m->m_pkthdr.rcvif = 0; 4530 4531 if (sp->pp_flags & PP_NOFRAMING) { 4532 *mtod(m, u_int16_t*) = htons(cp->proto); 4533 pkthdrlen = 2; 4534 lh = (struct lcp_header*)(mtod(m, u_int8_t*)+2); 4535 } else { 4536 struct ppp_header *h; 4537 h = mtod (m, struct ppp_header*); 4538 h->address = PPP_ALLSTATIONS; /* broadcast address */ 4539 h->control = PPP_UI; /* Unnumbered Info */ 4540 h->protocol = htons(cp->proto); 4541 pkthdrlen = PPP_HEADER_LEN; 4542 4543 lh = (struct lcp_header*)(h + 1); 4544 } 4545 4546 lh->type = type; 4547 lh->ident = id; 4548 p = (u_char*) (lh+1); 4549 4550 va_start(ap, id); 4551 len = 0; 4552 4553 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 4554 msg = va_arg(ap, const char *); 4555 len += mlen; 4556 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 4557 va_end(ap); 4558 m_freem(m); 4559 return; 4560 } 4561 4562 bcopy(msg, p, mlen); 4563 p += mlen; 4564 } 4565 va_end(ap); 4566 4567 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 4568 lh->len = htons (LCP_HEADER_LEN + len); 4569 4570 if (debug) { 4571 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 4572 SPP_ARGS(ifp), cp->name, 4573 sppp_auth_type_name(cp->proto, lh->type), 4574 lh->ident, ntohs(lh->len)); 4575 if (len) 4576 sppp_print_bytes((u_char*) (lh+1), len); 4577 addlog(">\n"); 4578 } 4579 if (IF_QFULL (&sp->pp_cpq)) { 4580 IF_DROP (&sp->pp_fastq); 4581 IF_DROP (&ifp->if_snd); 4582 m_freem (m); 4583 ++ifp->if_oerrors; 4584 } else 4585 IF_ENQUEUE (&sp->pp_cpq, m); 4586 if (! (ifp->if_flags & IFF_OACTIVE)) 4587 (*ifp->if_start) (ifp); 4588 ifp->if_obytes += m->m_pkthdr.len + 3; 4589 } 4590 4591 /* 4592 * Send keepalive packets, every 10 seconds. 4593 */ 4594 static void 4595 sppp_keepalive(void *dummy) 4596 { 4597 struct sppp *sp; 4598 int s; 4599 time_t now; 4600 4601 s = splnet(); 4602 now = time.tv_sec; 4603 for (sp=spppq; sp; sp=sp->pp_next) { 4604 struct ifnet *ifp = &sp->pp_if; 4605 4606 /* check idle timeout */ 4607 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 4608 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 4609 /* idle timeout is enabled for this interface */ 4610 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 4611 if (ifp->if_flags & IFF_DEBUG) 4612 printf("%s: no activitiy for %lu seconds\n", 4613 sp->pp_if.if_xname, 4614 (unsigned long)(now-sp->pp_last_activity)); 4615 lcp.Close(sp); 4616 continue; 4617 } 4618 } 4619 4620 /* Keepalive mode disabled or channel down? */ 4621 if (! (sp->pp_flags & PP_KEEPALIVE) || 4622 ! (ifp->if_flags & IFF_RUNNING)) 4623 continue; 4624 4625 /* No keepalive in PPP mode if LCP not opened yet. */ 4626 if (! (sp->pp_flags & PP_CISCO) && 4627 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) 4628 continue; 4629 4630 if (sp->pp_alivecnt == MAXALIVECNT) { 4631 /* No keepalive packets got. Stop the interface. */ 4632 if_down (ifp); 4633 IF_PURGE (&sp->pp_cpq); 4634 if (! (sp->pp_flags & PP_CISCO)) { 4635 printf("%s: LCP keepalive timed out, going to restart the connection\n", 4636 ifp->if_xname); 4637 sp->pp_alivecnt = 0; 4638 4639 /* we are down, close all open protocols */ 4640 lcp.Close(sp); 4641 4642 /* And now prepare LCP to reestablish the link, if configured to do so. */ 4643 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 4644 4645 /* Close connection imediatly, completition of this 4646 * will summon the magic needed to reestablish it. */ 4647 sp->pp_tlf(sp); 4648 continue; 4649 } 4650 } 4651 if (sp->pp_alivecnt <= MAXALIVECNT) 4652 ++sp->pp_alivecnt; 4653 if (sp->pp_flags & PP_CISCO) 4654 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ, 4655 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 4656 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 4657 int32_t nmagic = htonl (sp->lcp.magic); 4658 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 4659 sppp_cp_send (sp, PPP_LCP, ECHO_REQ, 4660 sp->lcp.echoid, 4, &nmagic); 4661 } 4662 } 4663 splx(s); 4664 callout_reset(&keepalive_ch, hz * 10, sppp_keepalive, NULL); 4665 } 4666 4667 /* 4668 * Get both IP addresses. 4669 */ 4670 static void 4671 sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, u_int32_t *srcmask) 4672 { 4673 struct ifnet *ifp = &sp->pp_if; 4674 struct ifaddr *ifa; 4675 struct sockaddr_in *si, *sm; 4676 u_int32_t ssrc, ddst; 4677 4678 sm = NULL; 4679 ssrc = ddst = 0; 4680 /* 4681 * Pick the first AF_INET address from the list, 4682 * aliases don't make any sense on a p2p link anyway. 4683 */ 4684 si = 0; 4685 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 4686 if (ifa->ifa_addr->sa_family == AF_INET) { 4687 si = (struct sockaddr_in *)ifa->ifa_addr; 4688 sm = (struct sockaddr_in *)ifa->ifa_netmask; 4689 if (si) 4690 break; 4691 } 4692 } 4693 if (ifa) { 4694 if (si && si->sin_addr.s_addr) { 4695 ssrc = si->sin_addr.s_addr; 4696 if (srcmask) 4697 *srcmask = ntohl(sm->sin_addr.s_addr); 4698 } 4699 4700 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 4701 if (si && si->sin_addr.s_addr) 4702 ddst = si->sin_addr.s_addr; 4703 } 4704 4705 if (dst) *dst = ntohl(ddst); 4706 if (src) *src = ntohl(ssrc); 4707 } 4708 4709 /* 4710 * Set IP addresses. Must be called at splnet. 4711 * If an address is 0, leave it the way it is. 4712 */ 4713 static void 4714 sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr) 4715 { 4716 STDDCL; 4717 struct ifaddr *ifa; 4718 struct sockaddr_in *si; 4719 struct sockaddr_in *dest; 4720 4721 /* 4722 * Pick the first AF_INET address from the list, 4723 * aliases don't make any sense on a p2p link anyway. 4724 */ 4725 4726 si = 0; 4727 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4728 { 4729 if (ifa->ifa_addr->sa_family == AF_INET) 4730 { 4731 si = (struct sockaddr_in *)ifa->ifa_addr; 4732 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4733 if (si) 4734 break; 4735 } 4736 } 4737 4738 if (ifa && si) 4739 { 4740 int error; 4741 struct sockaddr_in new_sin = *si; 4742 struct sockaddr_in new_dst = *dest; 4743 4744 /* 4745 * Scrub old routes now instead of calling in_ifinit with 4746 * scrub=1, because we may change the dstaddr 4747 * before the call to in_ifinit. 4748 */ 4749 in_ifscrub(ifp, ifatoia(ifa)); 4750 4751 if (myaddr != 0) 4752 new_sin.sin_addr.s_addr = htonl(myaddr); 4753 if (hisaddr != 0) { 4754 new_dst.sin_addr.s_addr = htonl(hisaddr); 4755 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) { 4756 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 4757 *dest = new_dst; /* fix dstaddr in place */ 4758 } 4759 } 4760 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4761 if(debug && error) 4762 { 4763 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addrs: in_ifinit " 4764 " failed, error=%d\n", SPP_ARGS(ifp), error); 4765 } 4766 } 4767 } 4768 4769 /* 4770 * Clear IP addresses. Must be called at splnet. 4771 */ 4772 static void 4773 sppp_clear_ip_addrs(struct sppp *sp) 4774 { 4775 struct ifnet *ifp = &sp->pp_if; 4776 struct ifaddr *ifa; 4777 struct sockaddr_in *si; 4778 struct sockaddr_in *dest; 4779 4780 u_int32_t remote; 4781 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4782 remote = sp->ipcp.saved_hisaddr; 4783 else 4784 sppp_get_ip_addrs(sp, 0, &remote, 0); 4785 4786 /* 4787 * Pick the first AF_INET address from the list, 4788 * aliases don't make any sense on a p2p link anyway. 4789 */ 4790 4791 si = 0; 4792 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4793 { 4794 if (ifa->ifa_addr->sa_family == AF_INET) 4795 { 4796 si = (struct sockaddr_in *)ifa->ifa_addr; 4797 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4798 if (si) 4799 break; 4800 } 4801 } 4802 4803 if (ifa && si) 4804 { 4805 struct sockaddr_in new_sin = *si; 4806 4807 in_ifscrub(ifp, ifatoia(ifa)); 4808 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 4809 new_sin.sin_addr.s_addr = 0; 4810 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4811 /* replace peer addr in place */ 4812 dest->sin_addr.s_addr = sp->ipcp.saved_hisaddr; 4813 in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4814 } 4815 } 4816 4817 #ifdef INET6 4818 /* 4819 * Get both IPv6 addresses. 4820 */ 4821 static void 4822 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 4823 struct in6_addr *srcmask) 4824 { 4825 struct ifnet *ifp = &sp->pp_if; 4826 struct ifaddr *ifa; 4827 struct sockaddr_in6 *si, *sm; 4828 struct in6_addr ssrc, ddst; 4829 4830 sm = NULL; 4831 memset(&ssrc, 0, sizeof(ssrc)); 4832 memset(&ddst, 0, sizeof(ddst)); 4833 /* 4834 * Pick the first link-local AF_INET6 address from the list, 4835 * aliases don't make any sense on a p2p link anyway. 4836 */ 4837 si = 0; 4838 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4839 if (ifa->ifa_addr->sa_family == AF_INET6) { 4840 si = (struct sockaddr_in6 *)ifa->ifa_addr; 4841 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 4842 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 4843 break; 4844 } 4845 if (ifa) { 4846 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 4847 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc)); 4848 if (srcmask) { 4849 bcopy(&sm->sin6_addr, srcmask, 4850 sizeof(*srcmask)); 4851 } 4852 } 4853 4854 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 4855 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 4856 bcopy(&si->sin6_addr, &ddst, sizeof(ddst)); 4857 } 4858 4859 if (dst) 4860 bcopy(&ddst, dst, sizeof(*dst)); 4861 if (src) 4862 bcopy(&ssrc, src, sizeof(*src)); 4863 } 4864 4865 #ifdef IPV6CP_MYIFID_DYN 4866 /* 4867 * Generate random ifid. 4868 */ 4869 static void 4870 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 4871 { 4872 /* TBD */ 4873 } 4874 4875 /* 4876 * Set my IPv6 address. Must be called at splnet. 4877 */ 4878 static void 4879 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 4880 { 4881 STDDCL; 4882 struct ifaddr *ifa; 4883 struct sockaddr_in6 *sin6; 4884 4885 /* 4886 * Pick the first link-local AF_INET6 address from the list, 4887 * aliases don't make any sense on a p2p link anyway. 4888 */ 4889 4890 sin6 = NULL; 4891 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4892 { 4893 if (ifa->ifa_addr->sa_family == AF_INET6) 4894 { 4895 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 4896 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 4897 break; 4898 } 4899 } 4900 4901 if (ifa && sin6) 4902 { 4903 int error; 4904 struct sockaddr_in6 new_sin6 = *sin6; 4905 4906 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr)); 4907 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 4908 if (debug && error) 4909 { 4910 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit " 4911 " failed, error=%d\n", SPP_ARGS(ifp), error); 4912 } 4913 } 4914 } 4915 #endif 4916 4917 /* 4918 * Suggest a candidate address to be used by peer. 4919 */ 4920 static void 4921 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 4922 { 4923 struct in6_addr myaddr; 4924 struct timeval tv; 4925 4926 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4927 4928 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 4929 microtime(&tv); 4930 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 4931 myaddr.s6_addr[14] ^= 0xff; 4932 myaddr.s6_addr[15] ^= 0xff; 4933 } else { 4934 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 4935 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 4936 } 4937 if (suggest) 4938 bcopy(&myaddr, suggest, sizeof(myaddr)); 4939 } 4940 #endif /*INET6*/ 4941 4942 /* 4943 * Process ioctl requests specific to the PPP interface. 4944 * Permissions have already been checked. 4945 */ 4946 static int 4947 sppp_params(struct sppp *sp, int cmd, void *data) 4948 { 4949 switch (cmd) { 4950 case SPPPGETAUTHCFG: 4951 { 4952 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 4953 int error; 4954 size_t len; 4955 4956 cfg->myauthflags = sp->myauth.flags; 4957 cfg->hisauthflags = sp->hisauth.flags; 4958 strncpy(cfg->ifname, sp->pp_if.if_xname, IFNAMSIZ); 4959 cfg->hisauth = 0; 4960 if (sp->hisauth.proto) 4961 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4962 cfg->myauth = 0; 4963 if (sp->myauth.proto) 4964 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4965 if (cfg->myname_length == 0) { 4966 if (sp->myauth.name != NULL) 4967 cfg->myname_length = strlen(sp->myauth.name)+1; 4968 } else { 4969 if (sp->myauth.name == NULL) { 4970 cfg->myname_length = 0; 4971 } else { 4972 len = strlen(sp->myauth.name)+1; 4973 if (cfg->myname_length < len) 4974 return (ENAMETOOLONG); 4975 error = copyout(sp->myauth.name, cfg->myname, len); 4976 if (error) return error; 4977 } 4978 } 4979 if (cfg->hisname_length == 0) { 4980 if(sp->hisauth.name != NULL) 4981 cfg->hisname_length = strlen(sp->hisauth.name)+1; 4982 } else { 4983 if (sp->hisauth.name == NULL) { 4984 cfg->hisname_length = 0; 4985 } else { 4986 len = strlen(sp->hisauth.name)+1; 4987 if (cfg->hisname_length < len) 4988 return (ENAMETOOLONG); 4989 error = copyout(sp->hisauth.name, cfg->hisname, len); 4990 if (error) return error; 4991 } 4992 } 4993 } 4994 break; 4995 case SPPPSETAUTHCFG: 4996 { 4997 struct spppauthcfg *cfg = (struct spppauthcfg*)data; 4998 int error; 4999 5000 if (sp->myauth.name) { 5001 free(sp->myauth.name, M_DEVBUF); 5002 sp->myauth.name = NULL; 5003 } 5004 if (sp->myauth.secret) { 5005 free(sp->myauth.secret, M_DEVBUF); 5006 sp->myauth.secret = NULL; 5007 } 5008 if (sp->hisauth.name) { 5009 free(sp->hisauth.name, M_DEVBUF); 5010 sp->hisauth.name = NULL; 5011 } 5012 if (sp->hisauth.secret) { 5013 free(sp->hisauth.secret, M_DEVBUF); 5014 sp->hisauth.secret = NULL; 5015 } 5016 5017 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5018 if (cfg->hisname_length >= MCLBYTES) 5019 return (ENAMETOOLONG); 5020 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5021 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5022 if (error) { 5023 free(sp->hisauth.name, M_DEVBUF); 5024 sp->hisauth.name = NULL; 5025 return error; 5026 } 5027 sp->hisauth.name[cfg->hisname_length-1] = 0; 5028 } 5029 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5030 if (cfg->hissecret_length >= MCLBYTES) 5031 return (ENAMETOOLONG); 5032 sp->hisauth.secret = malloc(cfg->hissecret_length, M_DEVBUF, M_WAITOK); 5033 error = copyin(cfg->hissecret, sp->hisauth.secret, cfg->hissecret_length); 5034 if (error) { 5035 free(sp->hisauth.secret, M_DEVBUF); 5036 sp->hisauth.secret = NULL; 5037 return error; 5038 } 5039 sp->hisauth.secret[cfg->hissecret_length-1] = 0; 5040 } 5041 if (cfg->myname != NULL && cfg->myname_length > 0) { 5042 if (cfg->myname_length >= MCLBYTES) 5043 return (ENAMETOOLONG); 5044 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5045 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5046 if (error) { 5047 free(sp->myauth.name, M_DEVBUF); 5048 sp->myauth.name = NULL; 5049 return error; 5050 } 5051 sp->myauth.name[cfg->myname_length-1] = 0; 5052 } 5053 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5054 if (cfg->mysecret_length >= MCLBYTES) 5055 return (ENAMETOOLONG); 5056 sp->myauth.secret = malloc(cfg->mysecret_length, M_DEVBUF, M_WAITOK); 5057 error = copyin(cfg->mysecret, sp->myauth.secret, cfg->mysecret_length); 5058 if (error) { 5059 free(sp->myauth.secret, M_DEVBUF); 5060 sp->myauth.secret = NULL; 5061 return error; 5062 } 5063 sp->myauth.secret[cfg->mysecret_length-1] = 0; 5064 } 5065 sp->myauth.flags = cfg->myauthflags; 5066 if (cfg->myauth) 5067 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5068 sp->hisauth.flags = cfg->hisauthflags; 5069 if (cfg->hisauth) 5070 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5071 sp->pp_auth_failures = 0; 5072 } 5073 break; 5074 case SPPPGETLCPCFG: 5075 { 5076 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5077 lcp->lcp_timeout = sp->lcp.timeout; 5078 } 5079 break; 5080 case SPPPSETLCPCFG: 5081 { 5082 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5083 sp->lcp.timeout = lcp->lcp_timeout; 5084 } 5085 break; 5086 case SPPPGETSTATUS: 5087 { 5088 struct spppstatus *status = (struct spppstatus *)data; 5089 status->phase = sp->pp_phase; 5090 } 5091 break; 5092 case SPPPGETIDLETO: 5093 { 5094 struct spppidletimeout *to = (struct spppidletimeout *)data; 5095 to->idle_seconds = sp->pp_idle_timeout; 5096 } 5097 break; 5098 case SPPPSETIDLETO: 5099 { 5100 struct spppidletimeout *to = (struct spppidletimeout *)data; 5101 sp->pp_idle_timeout = to->idle_seconds; 5102 } 5103 break; 5104 case SPPPSETAUTHFAILURE: 5105 { 5106 struct spppauthfailuresettings *afsettings = (struct spppauthfailuresettings *)data; 5107 sp->pp_max_auth_fail = afsettings->max_failures; 5108 sp->pp_auth_failures = 0; 5109 } 5110 break; 5111 case SPPPGETAUTHFAILURES: 5112 { 5113 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5114 stats->auth_failures = sp->pp_auth_failures; 5115 stats->max_failures = sp->pp_max_auth_fail; 5116 } 5117 break; 5118 case SPPPSETDNSOPTS: 5119 { 5120 struct spppdnssettings *req = (struct spppdnssettings*)data; 5121 sp->query_dns = req->query_dns & 3; 5122 } 5123 break; 5124 case SPPPGETDNSOPTS: 5125 { 5126 struct spppdnssettings *req = (struct spppdnssettings*)data; 5127 req->query_dns = sp->query_dns; 5128 } 5129 break; 5130 case SPPPGETDNSADDRS: 5131 { 5132 struct spppdnsaddrs *addrs = (struct spppdnsaddrs*)data; 5133 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5134 } 5135 break; 5136 default: 5137 return (EINVAL); 5138 } 5139 5140 return (0); 5141 } 5142 5143 static void 5144 sppp_phase_network(struct sppp *sp) 5145 { 5146 STDDCL; 5147 int i; 5148 u_int32_t mask; 5149 5150 sp->pp_phase = SPPP_PHASE_NETWORK; 5151 5152 if(debug) 5153 { 5154 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 5155 sppp_phase_name(sp->pp_phase)); 5156 } 5157 5158 /* Notify NCPs now. */ 5159 for (i = 0; i < IDX_COUNT; i++) 5160 if ((cps[i])->flags & CP_NCP) 5161 (cps[i])->Open(sp); 5162 5163 /* Send Up events to all NCPs. */ 5164 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5165 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) 5166 (cps[i])->Up(sp); 5167 5168 /* if no NCP is starting, all this was in vain, close down */ 5169 sppp_lcp_check_and_close(sp); 5170 } 5171 5172 5173 static const char * 5174 sppp_cp_type_name(u_char type) 5175 { 5176 static char buf[12]; 5177 switch (type) { 5178 case CONF_REQ: return "conf-req"; 5179 case CONF_ACK: return "conf-ack"; 5180 case CONF_NAK: return "conf-nak"; 5181 case CONF_REJ: return "conf-rej"; 5182 case TERM_REQ: return "term-req"; 5183 case TERM_ACK: return "term-ack"; 5184 case CODE_REJ: return "code-rej"; 5185 case PROTO_REJ: return "proto-rej"; 5186 case ECHO_REQ: return "echo-req"; 5187 case ECHO_REPLY: return "echo-reply"; 5188 case DISC_REQ: return "discard-req"; 5189 } 5190 sprintf (buf, "0x%x", type); 5191 return buf; 5192 } 5193 5194 static const char * 5195 sppp_auth_type_name(u_short proto, u_char type) 5196 { 5197 static char buf[12]; 5198 switch (proto) { 5199 case PPP_CHAP: 5200 switch (type) { 5201 case CHAP_CHALLENGE: return "challenge"; 5202 case CHAP_RESPONSE: return "response"; 5203 case CHAP_SUCCESS: return "success"; 5204 case CHAP_FAILURE: return "failure"; 5205 } 5206 case PPP_PAP: 5207 switch (type) { 5208 case PAP_REQ: return "req"; 5209 case PAP_ACK: return "ack"; 5210 case PAP_NAK: return "nak"; 5211 } 5212 } 5213 sprintf (buf, "0x%x", type); 5214 return buf; 5215 } 5216 5217 static const char * 5218 sppp_lcp_opt_name(u_char opt) 5219 { 5220 static char buf[12]; 5221 switch (opt) { 5222 case LCP_OPT_MRU: return "mru"; 5223 case LCP_OPT_ASYNC_MAP: return "async-map"; 5224 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 5225 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 5226 case LCP_OPT_MAGIC: return "magic"; 5227 case LCP_OPT_PROTO_COMP: return "proto-comp"; 5228 case LCP_OPT_ADDR_COMP: return "addr-comp"; 5229 } 5230 sprintf (buf, "0x%x", opt); 5231 return buf; 5232 } 5233 5234 static const char * 5235 sppp_ipcp_opt_name(u_char opt) 5236 { 5237 static char buf[12]; 5238 switch (opt) { 5239 case IPCP_OPT_ADDRESSES: return "addresses"; 5240 case IPCP_OPT_COMPRESSION: return "compression"; 5241 case IPCP_OPT_ADDRESS: return "address"; 5242 } 5243 sprintf (buf, "0x%x", opt); 5244 return buf; 5245 } 5246 5247 #ifdef INET6 5248 static const char * 5249 sppp_ipv6cp_opt_name(u_char opt) 5250 { 5251 static char buf[12]; 5252 switch (opt) { 5253 case IPV6CP_OPT_IFID: return "ifid"; 5254 case IPV6CP_OPT_COMPRESSION: return "compression"; 5255 } 5256 sprintf (buf, "0x%x", opt); 5257 return buf; 5258 } 5259 #endif 5260 5261 static const char * 5262 sppp_state_name(int state) 5263 { 5264 switch (state) { 5265 case STATE_INITIAL: return "initial"; 5266 case STATE_STARTING: return "starting"; 5267 case STATE_CLOSED: return "closed"; 5268 case STATE_STOPPED: return "stopped"; 5269 case STATE_CLOSING: return "closing"; 5270 case STATE_STOPPING: return "stopping"; 5271 case STATE_REQ_SENT: return "req-sent"; 5272 case STATE_ACK_RCVD: return "ack-rcvd"; 5273 case STATE_ACK_SENT: return "ack-sent"; 5274 case STATE_OPENED: return "opened"; 5275 } 5276 return "illegal"; 5277 } 5278 5279 static const char * 5280 sppp_phase_name(int phase) 5281 { 5282 switch (phase) { 5283 case SPPP_PHASE_DEAD: return "dead"; 5284 case SPPP_PHASE_ESTABLISH: return "establish"; 5285 case SPPP_PHASE_TERMINATE: return "terminate"; 5286 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 5287 case SPPP_PHASE_NETWORK: return "network"; 5288 } 5289 return "illegal"; 5290 } 5291 5292 static const char * 5293 sppp_proto_name(u_short proto) 5294 { 5295 static char buf[12]; 5296 switch (proto) { 5297 case PPP_LCP: return "lcp"; 5298 case PPP_IPCP: return "ipcp"; 5299 case PPP_PAP: return "pap"; 5300 case PPP_CHAP: return "chap"; 5301 case PPP_IPV6CP: return "ipv6cp"; 5302 } 5303 sprintf(buf, "0x%x", (unsigned)proto); 5304 return buf; 5305 } 5306 5307 static void 5308 sppp_print_bytes(const u_char *p, u_short len) 5309 { 5310 addlog(" %02x", *p++); 5311 while (--len > 0) 5312 addlog("-%02x", *p++); 5313 } 5314 5315 static void 5316 sppp_print_string(const char *p, u_short len) 5317 { 5318 u_char c; 5319 5320 while (len-- > 0) { 5321 c = *p++; 5322 /* 5323 * Print only ASCII chars directly. RFC 1994 recommends 5324 * using only them, but we don't rely on it. */ 5325 if (c < ' ' || c > '~') 5326 addlog("\\x%x", c); 5327 else 5328 addlog("%c", c); 5329 } 5330 } 5331 5332 static const char * 5333 sppp_dotted_quad(u_int32_t addr) 5334 { 5335 static char s[16]; 5336 sprintf(s, "%d.%d.%d.%d", 5337 (int)((addr >> 24) & 0xff), 5338 (int)((addr >> 16) & 0xff), 5339 (int)((addr >> 8) & 0xff), 5340 (int)(addr & 0xff)); 5341 return s; 5342 } 5343 5344 /* a dummy, used to drop uninteresting events */ 5345 static void 5346 sppp_null(struct sppp *unused) 5347 { 5348 /* do just nothing */ 5349 } 5350 /* 5351 * This file is large. Tell emacs to highlight it nevertheless. 5352 * 5353 * Local Variables: 5354 * hilit-auto-highlight-maxout: 120000 5355 * End: 5356 */ 5357
Indexes created Fri Sep 26 08:10:20 GMT 2025