if_spppsubr.c revision 1.191
1 /* $NetBSD: if_spppsubr.c,v 1.191 2020/11/25 09:09:24 yamaguchi 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 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions are met: 18 * 1. Redistributions of source code must retain the above copyright notice, 19 * this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright notice, 21 * this list of conditions and the following disclaimer in the documentation 22 * and/or other materials provided with the distribution. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE FREEBSD PROJECT ``AS IS'' AND ANY 25 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE FREEBSD PROJECT OR CONTRIBUTORS BE 28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 34 * POSSIBILITY OF SUCH DAMAGE. 35 * 36 * From: Version 2.4, Thu Apr 30 17:17:21 MSD 1997 37 * 38 * From: if_spppsubr.c,v 1.39 1998/04/04 13:26:03 phk Exp 39 * 40 * From: Id: if_spppsubr.c,v 1.23 1999/02/23 14:47:50 hm Exp 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: if_spppsubr.c,v 1.191 2020/11/25 09:09:24 yamaguchi Exp $"); 45 46 #if defined(_KERNEL_OPT) 47 #include "opt_inet.h" 48 #include "opt_modular.h" 49 #include "opt_compat_netbsd.h" 50 #include "opt_net_mpsafe.h" 51 #endif 52 53 54 #include <sys/param.h> 55 #include <sys/proc.h> 56 #include <sys/systm.h> 57 #include <sys/kernel.h> 58 #include <sys/sockio.h> 59 #include <sys/socket.h> 60 #include <sys/syslog.h> 61 #include <sys/malloc.h> 62 #include <sys/mbuf.h> 63 #include <sys/callout.h> 64 #include <sys/md5.h> 65 #include <sys/inttypes.h> 66 #include <sys/kauth.h> 67 #include <sys/cprng.h> 68 #include <sys/module.h> 69 #include <sys/workqueue.h> 70 #include <sys/atomic.h> 71 #include <sys/compat_stub.h> 72 73 #include <net/if.h> 74 #include <net/netisr.h> 75 #include <net/if_types.h> 76 #include <net/route.h> 77 #include <net/ppp_defs.h> 78 79 #include <netinet/in.h> 80 #include <netinet/in_systm.h> 81 #include <netinet/in_var.h> 82 #ifdef INET 83 #include <netinet/ip.h> 84 #include <netinet/tcp.h> 85 #endif 86 #include <net/ethertypes.h> 87 88 #ifdef INET6 89 #include <netinet6/scope6_var.h> 90 #endif 91 92 #include <net/if_sppp.h> 93 #include <net/if_spppvar.h> 94 95 #ifdef NET_MPSAFE 96 #define SPPPSUBR_MPSAFE 1 97 #endif 98 99 #define LCP_KEEPALIVE_INTERVAL 10 /* seconds between checks */ 100 #define LOOPALIVECNT 3 /* loopback detection tries */ 101 #define DEFAULT_MAXALIVECNT 3 /* max. missed alive packets */ 102 #define DEFAULT_NORECV_TIME 15 /* before we get worried */ 103 #define DEFAULT_MAX_AUTH_FAILURES 5 /* max. auth. failures */ 104 105 /* 106 * Interface flags that can be set in an ifconfig command. 107 * 108 * Setting link0 will make the link passive, i.e. it will be marked 109 * as being administrative openable, but won't be opened to begin 110 * with. Incoming calls will be answered, or subsequent calls with 111 * -link1 will cause the administrative open of the LCP layer. 112 * 113 * Setting link1 will cause the link to auto-dial only as packets 114 * arrive to be sent. 115 * 116 * Setting IFF_DEBUG will syslog the option negotiation and state 117 * transitions at level kern.debug. Note: all logs consistently look 118 * like 119 * 120 * <if-name><unit>: <proto-name> <additional info...> 121 * 122 * with <if-name><unit> being something like "bppp0", and <proto-name> 123 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. 124 */ 125 126 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 127 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 128 129 #define CONF_REQ 1 /* PPP configure request */ 130 #define CONF_ACK 2 /* PPP configure acknowledge */ 131 #define CONF_NAK 3 /* PPP configure negative ack */ 132 #define CONF_REJ 4 /* PPP configure reject */ 133 #define TERM_REQ 5 /* PPP terminate request */ 134 #define TERM_ACK 6 /* PPP terminate acknowledge */ 135 #define CODE_REJ 7 /* PPP code reject */ 136 #define PROTO_REJ 8 /* PPP protocol reject */ 137 #define ECHO_REQ 9 /* PPP echo request */ 138 #define ECHO_REPLY 10 /* PPP echo reply */ 139 #define DISC_REQ 11 /* PPP discard request */ 140 141 #define LCP_OPT_MRU 1 /* maximum receive unit */ 142 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 143 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 144 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 145 #define LCP_OPT_MAGIC 5 /* magic number */ 146 #define LCP_OPT_RESERVED 6 /* reserved */ 147 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 148 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 149 #define LCP_OPT_FCS_ALTS 9 /* FCS alternatives */ 150 #define LCP_OPT_SELF_DESC_PAD 10 /* self-describing padding */ 151 #define LCP_OPT_CALL_BACK 13 /* callback */ 152 #define LCP_OPT_COMPOUND_FRMS 15 /* compound frames */ 153 #define LCP_OPT_MP_MRRU 17 /* multilink MRRU */ 154 #define LCP_OPT_MP_SSNHF 18 /* multilink short seq. numbers */ 155 #define LCP_OPT_MP_EID 19 /* multilink endpoint discriminator */ 156 157 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 158 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol */ 159 #define IPCP_OPT_ADDRESS 3 /* local IP address */ 160 #define IPCP_OPT_PRIMDNS 129 /* primary remote dns address */ 161 #define IPCP_OPT_SECDNS 131 /* secondary remote dns address */ 162 163 #define IPCP_UPDATE_LIMIT 8 /* limit of pending IP updating job */ 164 #define IPCP_SET_ADDRS 1 /* marker for IP address setting job */ 165 #define IPCP_CLEAR_ADDRS 2 /* marker for IP address clearing job */ 166 167 #define IPV6CP_OPT_IFID 1 /* interface identifier */ 168 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 169 170 #define PAP_REQ 1 /* PAP name/password request */ 171 #define PAP_ACK 2 /* PAP acknowledge */ 172 #define PAP_NAK 3 /* PAP fail */ 173 174 #define CHAP_CHALLENGE 1 /* CHAP challenge request */ 175 #define CHAP_RESPONSE 2 /* CHAP challenge response */ 176 #define CHAP_SUCCESS 3 /* CHAP response ok */ 177 #define CHAP_FAILURE 4 /* CHAP response failed */ 178 179 #define CHAP_MD5 5 /* hash algorithm - MD5 */ 180 181 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 182 #define CISCO_UNICAST 0x0f /* Cisco unicast address */ 183 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 184 #define CISCO_ADDR_REQ 0 /* Cisco address request */ 185 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 186 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 187 188 /* states are named and numbered according to RFC 1661 */ 189 #define STATE_INITIAL 0 190 #define STATE_STARTING 1 191 #define STATE_CLOSED 2 192 #define STATE_STOPPED 3 193 #define STATE_CLOSING 4 194 #define STATE_STOPPING 5 195 #define STATE_REQ_SENT 6 196 #define STATE_ACK_RCVD 7 197 #define STATE_ACK_SENT 8 198 #define STATE_OPENED 9 199 200 struct ppp_header { 201 uint8_t address; 202 uint8_t control; 203 uint16_t protocol; 204 } __packed; 205 #define PPP_HEADER_LEN sizeof (struct ppp_header) 206 207 struct lcp_header { 208 uint8_t type; 209 uint8_t ident; 210 uint16_t len; 211 } __packed; 212 #define LCP_HEADER_LEN sizeof (struct lcp_header) 213 214 struct cisco_packet { 215 uint32_t type; 216 uint32_t par1; 217 uint32_t par2; 218 uint16_t rel; 219 uint16_t time0; 220 uint16_t time1; 221 } __packed; 222 #define CISCO_PACKET_LEN 18 223 224 /* 225 * We follow the spelling and capitalization of RFC 1661 here, to make 226 * it easier comparing with the standard. Please refer to this RFC in 227 * case you can't make sense out of these abbreviation; it will also 228 * explain the semantics related to the various events and actions. 229 */ 230 struct cp { 231 u_short proto; /* PPP control protocol number */ 232 u_char protoidx; /* index into state table in struct sppp */ 233 u_char flags; 234 #define CP_LCP 0x01 /* this is the LCP */ 235 #define CP_AUTH 0x02 /* this is an authentication protocol */ 236 #define CP_NCP 0x04 /* this is a NCP */ 237 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 238 const char *name; /* name of this control protocol */ 239 /* event handlers */ 240 void (*Up)(struct sppp *); 241 void (*Down)(struct sppp *); 242 void (*Open)(struct sppp *); 243 void (*Close)(struct sppp *); 244 void (*TO)(void *); 245 int (*RCR)(struct sppp *, struct lcp_header *, int); 246 void (*RCN_rej)(struct sppp *, struct lcp_header *, int); 247 void (*RCN_nak)(struct sppp *, struct lcp_header *, int); 248 /* actions */ 249 void (*tlu)(struct sppp *sp); 250 void (*tld)(struct sppp *sp); 251 void (*tls)(struct sppp *sp); 252 void (*tlf)(struct sppp *sp); 253 void (*scr)(struct sppp *sp); 254 }; 255 256 static struct sppp *spppq; 257 static kmutex_t *spppq_lock = NULL; 258 static callout_t keepalive_ch; 259 260 #define SPPPQ_LOCK() if (spppq_lock) \ 261 mutex_enter(spppq_lock); 262 #define SPPPQ_UNLOCK() if (spppq_lock) \ 263 mutex_exit(spppq_lock); 264 265 #define SPPP_LOCK(_sp, _op) rw_enter(&(_sp)->pp_lock, (_op)) 266 #define SPPP_UNLOCK(_sp) rw_exit(&(_sp)->pp_lock) 267 #define SPPP_WLOCKED(_sp) rw_write_held(&(_sp)->pp_lock) 268 #define SPPP_UPGRADE(_sp) do{ \ 269 SPPP_UNLOCK(_sp); \ 270 SPPP_LOCK(_sp, RW_WRITER); \ 271 }while (0) 272 #define SPPP_DOWNGRADE(_sp) rw_downgrade(&(_sp)->pp_lock) 273 274 #ifdef INET 275 #ifndef SPPPSUBR_MPSAFE 276 /* 277 * The following disgusting hack gets around the problem that IP TOS 278 * can't be set yet. We want to put "interactive" traffic on a high 279 * priority queue. To decide if traffic is interactive, we check that 280 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 281 * 282 * XXX is this really still necessary? - joerg - 283 */ 284 static u_short interactive_ports[8] = { 285 0, 513, 0, 0, 286 0, 21, 0, 23, 287 }; 288 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 289 #endif /* SPPPSUBR_MPSAFE */ 290 #endif 291 292 /* almost every function needs these */ 293 #define STDDCL \ 294 struct ifnet *ifp = &sp->pp_if; \ 295 int debug = ifp->if_flags & IFF_DEBUG 296 297 static int sppp_output(struct ifnet *, struct mbuf *, 298 const struct sockaddr *, const struct rtentry *); 299 300 static void sppp_cisco_send(struct sppp *, int, int32_t, int32_t); 301 static void sppp_cisco_input(struct sppp *, struct mbuf *); 302 303 static void sppp_cp_input(const struct cp *, struct sppp *, 304 struct mbuf *); 305 static void sppp_cp_send(struct sppp *, u_short, u_char, 306 u_char, u_short, void *); 307 /* static void sppp_cp_timeout(void *arg); */ 308 static void sppp_cp_change_state(const struct cp *, struct sppp *, int); 309 static void sppp_auth_send(const struct cp *, struct sppp *, 310 unsigned int, unsigned int, ...); 311 312 static void sppp_up_event(const struct cp *, struct sppp *); 313 static void sppp_down_event(const struct cp *, struct sppp *); 314 static void sppp_open_event(const struct cp *, struct sppp *); 315 static void sppp_close_event(const struct cp *, struct sppp *); 316 static void sppp_to_event(const struct cp *, struct sppp *); 317 318 static void sppp_null(struct sppp *); 319 320 static void sppp_lcp_init(struct sppp *); 321 static void sppp_lcp_up(struct sppp *); 322 static void sppp_lcp_down(struct sppp *); 323 static void sppp_lcp_open(struct sppp *); 324 static void sppp_lcp_close(struct sppp *); 325 static void sppp_lcp_TO(void *); 326 static int sppp_lcp_RCR(struct sppp *, struct lcp_header *, int); 327 static void sppp_lcp_RCN_rej(struct sppp *, struct lcp_header *, int); 328 static void sppp_lcp_RCN_nak(struct sppp *, struct lcp_header *, int); 329 static void sppp_lcp_tlu(struct sppp *); 330 static void sppp_lcp_tld(struct sppp *); 331 static void sppp_lcp_tls(struct sppp *); 332 static void sppp_lcp_tlf(struct sppp *); 333 static void sppp_lcp_scr(struct sppp *); 334 static void sppp_lcp_check_and_close(struct sppp *); 335 static int sppp_ncp_check(struct sppp *); 336 337 static void sppp_ipcp_init(struct sppp *); 338 static void sppp_ipcp_up(struct sppp *); 339 static void sppp_ipcp_down(struct sppp *); 340 static void sppp_ipcp_open(struct sppp *); 341 static void sppp_ipcp_close(struct sppp *); 342 static void sppp_ipcp_TO(void *); 343 static int sppp_ipcp_RCR(struct sppp *, struct lcp_header *, int); 344 static void sppp_ipcp_RCN_rej(struct sppp *, struct lcp_header *, int); 345 static void sppp_ipcp_RCN_nak(struct sppp *, struct lcp_header *, int); 346 static void sppp_ipcp_tlu(struct sppp *); 347 static void sppp_ipcp_tld(struct sppp *); 348 static void sppp_ipcp_tls(struct sppp *); 349 static void sppp_ipcp_tlf(struct sppp *); 350 static void sppp_ipcp_scr(struct sppp *); 351 352 static void sppp_ipv6cp_init(struct sppp *); 353 static void sppp_ipv6cp_up(struct sppp *); 354 static void sppp_ipv6cp_down(struct sppp *); 355 static void sppp_ipv6cp_open(struct sppp *); 356 static void sppp_ipv6cp_close(struct sppp *); 357 static void sppp_ipv6cp_TO(void *); 358 static int sppp_ipv6cp_RCR(struct sppp *, struct lcp_header *, int); 359 static void sppp_ipv6cp_RCN_rej(struct sppp *, struct lcp_header *, int); 360 static void sppp_ipv6cp_RCN_nak(struct sppp *, struct lcp_header *, int); 361 static void sppp_ipv6cp_tlu(struct sppp *); 362 static void sppp_ipv6cp_tld(struct sppp *); 363 static void sppp_ipv6cp_tls(struct sppp *); 364 static void sppp_ipv6cp_tlf(struct sppp *); 365 static void sppp_ipv6cp_scr(struct sppp *); 366 367 static void sppp_pap_input(struct sppp *, struct mbuf *); 368 static void sppp_pap_init(struct sppp *); 369 static void sppp_pap_open(struct sppp *); 370 static void sppp_pap_close(struct sppp *); 371 static void sppp_pap_TO(void *); 372 static void sppp_pap_my_TO(void *); 373 static void sppp_pap_tlu(struct sppp *); 374 static void sppp_pap_tld(struct sppp *); 375 static void sppp_pap_scr(struct sppp *); 376 377 static void sppp_chap_input(struct sppp *, struct mbuf *); 378 static void sppp_chap_init(struct sppp *); 379 static void sppp_chap_open(struct sppp *); 380 static void sppp_chap_close(struct sppp *); 381 static void sppp_chap_TO(void *); 382 static void sppp_chap_tlu(struct sppp *); 383 static void sppp_chap_tld(struct sppp *); 384 static void sppp_chap_scr(struct sppp *); 385 386 static const char *sppp_auth_type_name(u_short, u_char); 387 static const char *sppp_cp_type_name(u_char); 388 static const char *sppp_dotted_quad(uint32_t); 389 static const char *sppp_ipcp_opt_name(u_char); 390 #ifdef INET6 391 static const char *sppp_ipv6cp_opt_name(u_char); 392 #endif 393 static const char *sppp_lcp_opt_name(u_char); 394 static const char *sppp_phase_name(int); 395 static const char *sppp_proto_name(u_short); 396 static const char *sppp_state_name(int); 397 static int sppp_params(struct sppp *, u_long, void *); 398 #ifdef INET 399 static void sppp_get_ip_addrs(struct sppp *, uint32_t *, uint32_t *, uint32_t *); 400 static void sppp_set_ip_addrs_work(struct work *, struct sppp *); 401 static void sppp_set_ip_addrs(struct sppp *); 402 static void sppp_clear_ip_addrs_work(struct work *, struct sppp *); 403 static void sppp_clear_ip_addrs(struct sppp *); 404 static void sppp_update_ip_addrs_work(struct work *, void *); 405 #endif 406 static void sppp_keepalive(void *); 407 static void sppp_phase_network(struct sppp *); 408 static void sppp_print_bytes(const u_char *, u_short); 409 static void sppp_print_string(const char *, u_short); 410 #ifdef INET6 411 static void sppp_get_ip6_addrs(struct sppp *, struct in6_addr *, 412 struct in6_addr *, struct in6_addr *); 413 #ifdef IPV6CP_MYIFID_DYN 414 static void sppp_set_ip6_addr(struct sppp *, const struct in6_addr *); 415 static void sppp_gen_ip6_addr(struct sppp *, const struct in6_addr *); 416 #endif 417 static void sppp_suggest_ip6_addr(struct sppp *, struct in6_addr *); 418 #endif 419 420 static void sppp_notify_up(struct sppp *); 421 static void sppp_notify_down(struct sppp *); 422 static void sppp_notify_tls_wlocked(struct sppp *); 423 static void sppp_notify_tlf_wlocked(struct sppp *); 424 #ifdef INET6 425 static void sppp_notify_con_wlocked(struct sppp *); 426 #endif 427 static void sppp_notify_con(struct sppp *); 428 429 static void sppp_notify_chg_wlocked(struct sppp *); 430 431 432 /* our control protocol descriptors */ 433 static const struct cp lcp = { 434 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 435 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close, 436 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, 437 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, 438 sppp_lcp_scr 439 }; 440 441 static const struct cp ipcp = { 442 PPP_IPCP, IDX_IPCP, 443 #ifdef INET 444 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 445 #else 446 0, 447 #endif 448 "ipcp", 449 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close, 450 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, 451 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf, 452 sppp_ipcp_scr 453 }; 454 455 static const struct cp ipv6cp = { 456 PPP_IPV6CP, IDX_IPV6CP, 457 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 458 CP_NCP, 459 #else 460 0, 461 #endif 462 "ipv6cp", 463 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close, 464 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak, 465 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf, 466 sppp_ipv6cp_scr 467 }; 468 469 static const struct cp pap = { 470 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 471 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close, 472 sppp_pap_TO, 0, 0, 0, 473 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null, 474 sppp_pap_scr 475 }; 476 477 static const struct cp chap = { 478 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 479 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close, 480 sppp_chap_TO, 0, 0, 0, 481 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null, 482 sppp_chap_scr 483 }; 484 485 static const struct cp *cps[IDX_COUNT] = { 486 &lcp, /* IDX_LCP */ 487 &ipcp, /* IDX_IPCP */ 488 &ipv6cp, /* IDX_IPV6CP */ 489 &pap, /* IDX_PAP */ 490 &chap, /* IDX_CHAP */ 491 }; 492 493 static void 494 sppp_change_phase(struct sppp *sp, int phase) 495 { 496 STDDCL; 497 498 KASSERT(SPPP_WLOCKED(sp)); 499 500 if (sp->pp_phase == phase) 501 return; 502 503 sp->pp_phase = phase; 504 505 if (phase == SPPP_PHASE_NETWORK) 506 if_link_state_change(ifp, LINK_STATE_UP); 507 else 508 if_link_state_change(ifp, LINK_STATE_DOWN); 509 510 if (debug) 511 { 512 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 513 sppp_phase_name(sp->pp_phase)); 514 } 515 } 516 517 /* 518 * Exported functions, comprising our interface to the lower layer. 519 */ 520 521 /* 522 * Process the received packet. 523 */ 524 void 525 sppp_input(struct ifnet *ifp, struct mbuf *m) 526 { 527 struct ppp_header *h = NULL; 528 pktqueue_t *pktq = NULL; 529 struct ifqueue *inq = NULL; 530 uint16_t protocol; 531 struct sppp *sp = (struct sppp *)ifp; 532 int debug = ifp->if_flags & IFF_DEBUG; 533 int isr = 0; 534 535 SPPP_LOCK(sp, RW_READER); 536 537 if (ifp->if_flags & IFF_UP) { 538 /* Count received bytes, add hardware framing */ 539 if_statadd(ifp, if_ibytes, m->m_pkthdr.len + sp->pp_framebytes); 540 /* Note time of last receive */ 541 sp->pp_last_receive = time_uptime; 542 } 543 544 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 545 /* Too small packet, drop it. */ 546 if (debug) 547 log(LOG_DEBUG, 548 "%s: input packet is too small, %d bytes\n", 549 ifp->if_xname, m->m_pkthdr.len); 550 drop: 551 if_statadd2(ifp, if_ierrors, 1, if_iqdrops, 1); 552 m_freem(m); 553 SPPP_UNLOCK(sp); 554 return; 555 } 556 557 if (sp->pp_flags & PP_NOFRAMING) { 558 memcpy(&protocol, mtod(m, void *), 2); 559 protocol = ntohs(protocol); 560 m_adj(m, 2); 561 } else { 562 563 /* Get PPP header. */ 564 h = mtod(m, struct ppp_header *); 565 m_adj(m, PPP_HEADER_LEN); 566 567 switch (h->address) { 568 case PPP_ALLSTATIONS: 569 if (h->control != PPP_UI) 570 goto invalid; 571 if (sp->pp_flags & PP_CISCO) { 572 if (debug) 573 log(LOG_DEBUG, 574 "%s: PPP packet in Cisco mode " 575 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 576 ifp->if_xname, 577 h->address, h->control, ntohs(h->protocol)); 578 goto drop; 579 } 580 break; 581 case CISCO_MULTICAST: 582 case CISCO_UNICAST: 583 /* Don't check the control field here (RFC 1547). */ 584 if (! (sp->pp_flags & PP_CISCO)) { 585 if (debug) 586 log(LOG_DEBUG, 587 "%s: Cisco packet in PPP mode " 588 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 589 ifp->if_xname, 590 h->address, h->control, ntohs(h->protocol)); 591 goto drop; 592 } 593 switch (ntohs(h->protocol)) { 594 default: 595 if_statinc(ifp, if_noproto); 596 goto invalid; 597 case CISCO_KEEPALIVE: 598 SPPP_UNLOCK(sp); 599 sppp_cisco_input((struct sppp *) ifp, m); 600 m_freem(m); 601 return; 602 #ifdef INET 603 case ETHERTYPE_IP: 604 pktq = ip_pktq; 605 break; 606 #endif 607 #ifdef INET6 608 case ETHERTYPE_IPV6: 609 pktq = ip6_pktq; 610 break; 611 #endif 612 } 613 goto queue_pkt; 614 default: /* Invalid PPP packet. */ 615 invalid: 616 if (debug) 617 log(LOG_DEBUG, 618 "%s: invalid input packet " 619 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 620 ifp->if_xname, 621 h->address, h->control, ntohs(h->protocol)); 622 goto drop; 623 } 624 protocol = ntohs(h->protocol); 625 } 626 627 switch (protocol) { 628 default: 629 if (sp->state[IDX_LCP] == STATE_OPENED) { 630 uint16_t prot = htons(protocol); 631 632 SPPP_UPGRADE(sp); 633 sppp_cp_send(sp, PPP_LCP, PROTO_REJ, 634 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2, 635 &prot); 636 SPPP_DOWNGRADE(sp); 637 } 638 if (debug) 639 log(LOG_DEBUG, 640 "%s: invalid input protocol " 641 "<proto=0x%x>\n", ifp->if_xname, ntohs(protocol)); 642 if_statinc(ifp, if_noproto); 643 goto drop; 644 case PPP_LCP: 645 SPPP_UNLOCK(sp); 646 sppp_cp_input(&lcp, sp, m); 647 m_freem(m); 648 return; 649 case PPP_PAP: 650 SPPP_UNLOCK(sp); 651 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 652 sppp_pap_input(sp, m); 653 } 654 m_freem(m); 655 return; 656 case PPP_CHAP: 657 SPPP_UNLOCK(sp); 658 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 659 sppp_chap_input(sp, m); 660 } 661 m_freem(m); 662 return; 663 #ifdef INET 664 case PPP_IPCP: 665 SPPP_UNLOCK(sp); 666 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 667 sppp_cp_input(&ipcp, sp, m); 668 } 669 m_freem(m); 670 return; 671 case PPP_IP: 672 if (sp->state[IDX_IPCP] == STATE_OPENED) { 673 sp->pp_last_activity = time_uptime; 674 pktq = ip_pktq; 675 } 676 break; 677 #endif 678 #ifdef INET6 679 case PPP_IPV6CP: 680 SPPP_UNLOCK(sp); 681 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 682 sppp_cp_input(&ipv6cp, sp, m); 683 } 684 m_freem(m); 685 return; 686 687 case PPP_IPV6: 688 if (sp->state[IDX_IPV6CP] == STATE_OPENED) { 689 sp->pp_last_activity = time_uptime; 690 pktq = ip6_pktq; 691 } 692 break; 693 #endif 694 } 695 696 queue_pkt: 697 if ((ifp->if_flags & IFF_UP) == 0 || (!inq && !pktq)) { 698 goto drop; 699 } 700 701 /* Check queue. */ 702 if (__predict_true(pktq)) { 703 if (__predict_false(!pktq_enqueue(pktq, m, 0))) { 704 goto drop; 705 } 706 SPPP_UNLOCK(sp); 707 return; 708 } 709 710 SPPP_UNLOCK(sp); 711 712 IFQ_LOCK(inq); 713 if (IF_QFULL(inq)) { 714 /* Queue overflow. */ 715 IF_DROP(inq); 716 IFQ_UNLOCK(inq); 717 if (debug) 718 log(LOG_DEBUG, "%s: protocol queue overflow\n", 719 ifp->if_xname); 720 721 SPPP_LOCK(sp, RW_READER); 722 goto drop; 723 } 724 IF_ENQUEUE(inq, m); 725 IFQ_UNLOCK(inq); 726 schednetisr(isr); 727 } 728 729 /* 730 * Enqueue transmit packet. 731 */ 732 static int 733 sppp_output(struct ifnet *ifp, struct mbuf *m, 734 const struct sockaddr *dst, const struct rtentry *rt) 735 { 736 struct sppp *sp = (struct sppp *) ifp; 737 struct ppp_header *h = NULL; 738 #ifndef SPPPSUBR_MPSAFE 739 struct ifqueue *ifq = NULL; /* XXX */ 740 #endif 741 int s, error = 0; 742 uint16_t protocol; 743 size_t pktlen; 744 745 s = splnet(); 746 SPPP_LOCK(sp, RW_READER); 747 748 sp->pp_last_activity = time_uptime; 749 750 if ((ifp->if_flags & IFF_UP) == 0 || 751 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 752 SPPP_UNLOCK(sp); 753 splx(s); 754 755 m_freem(m); 756 757 return (ENETDOWN); 758 } 759 760 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 761 /* 762 * Interface is not yet running, but auto-dial. Need 763 * to start LCP for it. 764 */ 765 ifp->if_flags |= IFF_RUNNING; 766 767 SPPP_UNLOCK(sp); 768 splx(s); 769 770 SPPP_LOCK(sp, RW_WRITER); 771 lcp.Open(sp); 772 SPPP_UNLOCK(sp); 773 774 s = splnet(); 775 SPPP_LOCK(sp, RW_READER); 776 } 777 778 /* 779 * If the queueing discipline needs packet classification, 780 * do it before prepending link headers. 781 */ 782 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family); 783 784 #ifdef INET 785 if (dst->sa_family == AF_INET) { 786 struct ip *ip = NULL; 787 #ifndef SPPPSUBR_MPSAFE 788 struct tcphdr *th = NULL; 789 #endif 790 791 if (m->m_len >= sizeof(struct ip)) { 792 ip = mtod(m, struct ip *); 793 #ifndef SPPPSUBR_MPSAFE 794 if (ip->ip_p == IPPROTO_TCP && 795 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + 796 sizeof(struct tcphdr)) { 797 th = (struct tcphdr *) 798 ((char *)ip + (ip->ip_hl << 2)); 799 } 800 #endif 801 } else 802 ip = NULL; 803 804 /* 805 * When using dynamic local IP address assignment by using 806 * 0.0.0.0 as a local address, the first TCP session will 807 * not connect because the local TCP checksum is computed 808 * using 0.0.0.0 which will later become our real IP address 809 * so the TCP checksum computed at the remote end will 810 * become invalid. So we 811 * - don't let packets with src ip addr 0 thru 812 * - we flag TCP packets with src ip 0 as an error 813 */ 814 if (ip && ip->ip_src.s_addr == INADDR_ANY) { 815 uint8_t proto = ip->ip_p; 816 817 SPPP_UNLOCK(sp); 818 splx(s); 819 820 m_freem(m); 821 if (proto == IPPROTO_TCP) 822 return (EADDRNOTAVAIL); 823 else 824 return (0); 825 } 826 827 #ifndef SPPPSUBR_MPSAFE 828 /* 829 * Put low delay, telnet, rlogin and ftp control packets 830 * in front of the queue. 831 */ 832 if (!IF_QFULL(&sp->pp_fastq) && 833 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 834 (th && (INTERACTIVE(ntohs(th->th_sport)) || 835 INTERACTIVE(ntohs(th->th_dport)))))) 836 ifq = &sp->pp_fastq; 837 #endif /* !SPPPSUBR_MPSAFE */ 838 } 839 #endif 840 841 #ifdef INET6 842 if (dst->sa_family == AF_INET6) { 843 /* XXX do something tricky here? */ 844 } 845 #endif 846 847 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 848 /* 849 * Prepend general data packet PPP header. For now, IP only. 850 */ 851 M_PREPEND(m, PPP_HEADER_LEN, M_DONTWAIT); 852 if (! m) { 853 if (ifp->if_flags & IFF_DEBUG) 854 log(LOG_DEBUG, "%s: no memory for transmit header\n", 855 ifp->if_xname); 856 if_statinc(ifp, if_oerrors); 857 SPPP_UNLOCK(sp); 858 splx(s); 859 return (ENOBUFS); 860 } 861 /* 862 * May want to check size of packet 863 * (albeit due to the implementation it's always enough) 864 */ 865 h = mtod(m, struct ppp_header *); 866 if (sp->pp_flags & PP_CISCO) { 867 h->address = CISCO_UNICAST; /* unicast address */ 868 h->control = 0; 869 } else { 870 h->address = PPP_ALLSTATIONS; /* broadcast address */ 871 h->control = PPP_UI; /* Unnumbered Info */ 872 } 873 } 874 875 switch (dst->sa_family) { 876 #ifdef INET 877 case AF_INET: /* Internet Protocol */ 878 if (sp->pp_flags & PP_CISCO) 879 protocol = htons(ETHERTYPE_IP); 880 else { 881 /* 882 * Don't choke with an ENETDOWN early. It's 883 * possible that we just started dialing out, 884 * so don't drop the packet immediately. If 885 * we notice that we run out of buffer space 886 * below, we will however remember that we are 887 * not ready to carry IP packets, and return 888 * ENETDOWN, as opposed to ENOBUFS. 889 */ 890 protocol = htons(PPP_IP); 891 if (sp->state[IDX_IPCP] != STATE_OPENED) 892 error = ENETDOWN; 893 } 894 break; 895 #endif 896 #ifdef INET6 897 case AF_INET6: /* Internet Protocol version 6 */ 898 if (sp->pp_flags & PP_CISCO) 899 protocol = htons(ETHERTYPE_IPV6); 900 else { 901 /* 902 * Don't choke with an ENETDOWN early. It's 903 * possible that we just started dialing out, 904 * so don't drop the packet immediately. If 905 * we notice that we run out of buffer space 906 * below, we will however remember that we are 907 * not ready to carry IP packets, and return 908 * ENETDOWN, as opposed to ENOBUFS. 909 */ 910 protocol = htons(PPP_IPV6); 911 if (sp->state[IDX_IPV6CP] != STATE_OPENED) 912 error = ENETDOWN; 913 } 914 break; 915 #endif 916 default: 917 m_freem(m); 918 if_statinc(ifp, if_oerrors); 919 SPPP_UNLOCK(sp); 920 splx(s); 921 return (EAFNOSUPPORT); 922 } 923 924 if (sp->pp_flags & PP_NOFRAMING) { 925 M_PREPEND(m, 2, M_DONTWAIT); 926 if (m == NULL) { 927 if (ifp->if_flags & IFF_DEBUG) 928 log(LOG_DEBUG, "%s: no memory for transmit header\n", 929 ifp->if_xname); 930 if_statinc(ifp, if_oerrors); 931 SPPP_UNLOCK(sp); 932 splx(s); 933 return (ENOBUFS); 934 } 935 *mtod(m, uint16_t *) = protocol; 936 } else { 937 h->protocol = protocol; 938 } 939 940 pktlen = m->m_pkthdr.len; 941 #ifdef SPPPSUBR_MPSAFE 942 SPPP_UNLOCK(sp); 943 error = if_transmit_lock(ifp, m); 944 SPPP_LOCK(sp, RW_READER); 945 if (error == 0) 946 if_statadd(ifp, if_obytes, pktlen + sp->pp_framebytes); 947 #else /* !SPPPSUBR_MPSAFE */ 948 error = ifq_enqueue2(ifp, ifq, m); 949 950 if (error == 0) { 951 /* 952 * Count output packets and bytes. 953 * The packet length includes header + additional hardware 954 * framing according to RFC 1333. 955 */ 956 if (!(ifp->if_flags & IFF_OACTIVE)) { 957 SPPP_UNLOCK(sp); 958 if_start_lock(ifp); 959 SPPP_LOCK(sp, RW_READER); 960 } 961 if_statadd(ifp, if_obytes, pktlen + sp->pp_framebytes); 962 } 963 #endif /* !SPPPSUBR_MPSAFE */ 964 SPPP_UNLOCK(sp); 965 splx(s); 966 return error; 967 } 968 969 void 970 sppp_attach(struct ifnet *ifp) 971 { 972 struct sppp *sp = (struct sppp *) ifp; 973 974 /* Initialize keepalive handler. */ 975 if (! spppq) { 976 callout_init(&keepalive_ch, CALLOUT_MPSAFE); 977 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 978 } 979 980 if (! spppq_lock) 981 spppq_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_SOFTNET); 982 983 /* Insert new entry into the keepalive list. */ 984 sp->pp_next = spppq; 985 spppq = sp; 986 987 sp->pp_if.if_type = IFT_PPP; 988 sp->pp_if.if_output = sppp_output; 989 sp->pp_fastq.ifq_maxlen = 32; 990 sp->pp_cpq.ifq_maxlen = 20; 991 sp->pp_loopcnt = 0; 992 sp->pp_alivecnt = 0; 993 sp->pp_last_activity = 0; 994 sp->pp_last_receive = 0; 995 sp->pp_maxalive = DEFAULT_MAXALIVECNT; 996 sp->pp_max_noreceive = DEFAULT_NORECV_TIME; 997 sp->pp_idle_timeout = 0; 998 memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq)); 999 memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq)); 1000 sp->pp_auth_failures = 0; 1001 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 1002 sp->pp_phase = SPPP_PHASE_DEAD; 1003 sp->pp_up = sppp_notify_up; 1004 sp->pp_down = sppp_notify_down; 1005 rw_init(&sp->pp_lock); 1006 1007 if_alloc_sadl(ifp); 1008 1009 /* Lets not beat about the bush, we know we're down. */ 1010 ifp->if_link_state = LINK_STATE_DOWN; 1011 1012 memset(&sp->myauth, 0, sizeof sp->myauth); 1013 memset(&sp->hisauth, 0, sizeof sp->hisauth); 1014 SPPP_LOCK(sp, RW_WRITER); 1015 sppp_lcp_init(sp); 1016 sppp_ipcp_init(sp); 1017 sppp_ipv6cp_init(sp); 1018 sppp_pap_init(sp); 1019 sppp_chap_init(sp); 1020 SPPP_UNLOCK(sp); 1021 } 1022 1023 void 1024 sppp_detach(struct ifnet *ifp) 1025 { 1026 struct sppp **q, *p, *sp = (struct sppp *) ifp; 1027 1028 /* Remove the entry from the keepalive list. */ 1029 SPPPQ_LOCK(); 1030 for (q = &spppq; (p = *q); q = &p->pp_next) 1031 if (p == sp) { 1032 *q = p->pp_next; 1033 break; 1034 } 1035 SPPPQ_UNLOCK(); 1036 1037 if (! spppq) { 1038 /* Stop keepalive handler. */ 1039 callout_stop(&keepalive_ch); 1040 mutex_obj_free(spppq_lock); 1041 spppq_lock = NULL; 1042 } 1043 1044 SPPP_LOCK(sp, RW_WRITER); 1045 1046 /* to avoid workqueue enqueued */ 1047 atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1); 1048 workqueue_wait(sp->ipcp.update_addrs_wq, &sp->ipcp.update_addrs_wk); 1049 workqueue_destroy(sp->ipcp.update_addrs_wq); 1050 pcq_destroy(sp->ipcp.update_addrs_q); 1051 1052 callout_stop(&sp->ch[IDX_LCP]); 1053 callout_stop(&sp->ch[IDX_IPCP]); 1054 callout_stop(&sp->ch[IDX_PAP]); 1055 callout_stop(&sp->ch[IDX_CHAP]); 1056 #ifdef INET6 1057 callout_stop(&sp->ch[IDX_IPV6CP]); 1058 #endif 1059 callout_stop(&sp->pap_my_to_ch); 1060 1061 /* free authentication info */ 1062 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 1063 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 1064 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 1065 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 1066 SPPP_UNLOCK(sp); 1067 rw_destroy(&sp->pp_lock); 1068 } 1069 1070 /* 1071 * Flush the interface output queue. 1072 */ 1073 void 1074 sppp_flush(struct ifnet *ifp) 1075 { 1076 struct sppp *sp = (struct sppp *) ifp; 1077 1078 SPPP_LOCK(sp, RW_WRITER); 1079 IFQ_PURGE(&sp->pp_if.if_snd); 1080 IF_PURGE(&sp->pp_fastq); 1081 IF_PURGE(&sp->pp_cpq); 1082 SPPP_UNLOCK(sp); 1083 } 1084 1085 /* 1086 * Check if the output queue is empty. 1087 */ 1088 int 1089 sppp_isempty(struct ifnet *ifp) 1090 { 1091 struct sppp *sp = (struct sppp *) ifp; 1092 int empty, s; 1093 1094 s = splnet(); 1095 SPPP_LOCK(sp, RW_READER); 1096 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1097 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1098 SPPP_UNLOCK(sp); 1099 splx(s); 1100 return (empty); 1101 } 1102 1103 /* 1104 * Get next packet to send. 1105 */ 1106 struct mbuf * 1107 sppp_dequeue(struct ifnet *ifp) 1108 { 1109 struct sppp *sp = (struct sppp *) ifp; 1110 struct mbuf *m; 1111 int s; 1112 1113 s = splnet(); 1114 SPPP_LOCK(sp, RW_WRITER); 1115 /* 1116 * Process only the control protocol queue until we have at 1117 * least one NCP open. 1118 * 1119 * Do always serve all three queues in Cisco mode. 1120 */ 1121 IF_DEQUEUE(&sp->pp_cpq, m); 1122 if (m == NULL && 1123 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1124 IF_DEQUEUE(&sp->pp_fastq, m); 1125 if (m == NULL) 1126 IFQ_DEQUEUE(&sp->pp_if.if_snd, m); 1127 } 1128 SPPP_UNLOCK(sp); 1129 splx(s); 1130 return m; 1131 } 1132 1133 /* 1134 * Process an ioctl request. Called on low priority level. 1135 */ 1136 int 1137 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1138 { 1139 struct lwp *l = curlwp; /* XXX */ 1140 struct ifreq *ifr = (struct ifreq *) data; 1141 struct ifaddr *ifa = (struct ifaddr *) data; 1142 struct sppp *sp = (struct sppp *) ifp; 1143 int s, error=0, going_up, going_down; 1144 u_short newmode; 1145 1146 s = splnet(); 1147 switch (cmd) { 1148 case SIOCINITIFADDR: 1149 ifa->ifa_rtrequest = p2p_rtrequest; 1150 break; 1151 1152 case SIOCSIFFLAGS: 1153 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1154 break; 1155 1156 SPPP_LOCK(sp, RW_WRITER); 1157 going_up = ifp->if_flags & IFF_UP && 1158 (ifp->if_flags & IFF_RUNNING) == 0; 1159 going_down = (ifp->if_flags & IFF_UP) == 0 && 1160 ifp->if_flags & IFF_RUNNING; 1161 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1162 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1163 /* sanity */ 1164 newmode = IFF_PASSIVE; 1165 ifp->if_flags &= ~IFF_AUTO; 1166 } 1167 1168 if (going_up || going_down) { 1169 lcp.Close(sp); 1170 } 1171 if (going_up && newmode == 0) { 1172 /* neither auto-dial nor passive */ 1173 ifp->if_flags |= IFF_RUNNING; 1174 if (!(sp->pp_flags & PP_CISCO)) 1175 lcp.Open(sp); 1176 } else if (going_down) { 1177 SPPP_UNLOCK(sp); 1178 sppp_flush(ifp); 1179 SPPP_LOCK(sp, RW_WRITER); 1180 1181 ifp->if_flags &= ~IFF_RUNNING; 1182 } 1183 SPPP_UNLOCK(sp); 1184 break; 1185 1186 case SIOCSIFMTU: 1187 if (ifr->ifr_mtu < PPP_MINMRU || 1188 ifr->ifr_mtu > sp->lcp.their_mru) { 1189 error = EINVAL; 1190 break; 1191 } 1192 /*FALLTHROUGH*/ 1193 case SIOCGIFMTU: 1194 if ((error = ifioctl_common(ifp, cmd, data)) == ENETRESET) 1195 error = 0; 1196 break; 1197 case SIOCADDMULTI: 1198 case SIOCDELMULTI: 1199 break; 1200 1201 case SPPPSETAUTHCFG: 1202 case SPPPSETLCPCFG: 1203 case SPPPSETIDLETO: 1204 case SPPPSETAUTHFAILURE: 1205 case SPPPSETDNSOPTS: 1206 case SPPPSETKEEPALIVE: 1207 #if defined(COMPAT_50) || defined(MODULAR) 1208 case __SPPPSETIDLETO50: 1209 case __SPPPSETKEEPALIVE50: 1210 #endif /* COMPAT_50 || MODULAR */ 1211 error = kauth_authorize_network(l->l_cred, 1212 KAUTH_NETWORK_INTERFACE, 1213 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, 1214 NULL); 1215 if (error) 1216 break; 1217 error = sppp_params(sp, cmd, data); 1218 break; 1219 1220 case SPPPGETAUTHCFG: 1221 case SPPPGETLCPCFG: 1222 case SPPPGETAUTHFAILURES: 1223 error = kauth_authorize_network(l->l_cred, 1224 KAUTH_NETWORK_INTERFACE, 1225 KAUTH_REQ_NETWORK_INTERFACE_GETPRIV, ifp, (void *)cmd, 1226 NULL); 1227 if (error) 1228 break; 1229 error = sppp_params(sp, cmd, data); 1230 break; 1231 1232 case SPPPGETSTATUS: 1233 case SPPPGETSTATUSNCP: 1234 case SPPPGETIDLETO: 1235 case SPPPGETDNSOPTS: 1236 case SPPPGETDNSADDRS: 1237 case SPPPGETKEEPALIVE: 1238 #if defined(COMPAT_50) || defined(MODULAR) 1239 case __SPPPGETIDLETO50: 1240 case __SPPPGETKEEPALIVE50: 1241 #endif /* COMPAT_50 || MODULAR */ 1242 error = sppp_params(sp, cmd, data); 1243 break; 1244 1245 default: 1246 error = ifioctl_common(ifp, cmd, data); 1247 break; 1248 } 1249 splx(s); 1250 return (error); 1251 } 1252 1253 1254 /* 1255 * Cisco framing implementation. 1256 */ 1257 1258 /* 1259 * Handle incoming Cisco keepalive protocol packets. 1260 */ 1261 static void 1262 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1263 { 1264 STDDCL; 1265 struct cisco_packet *h; 1266 #ifdef INET 1267 uint32_t me, mymask = 0; /* XXX: GCC */ 1268 #endif 1269 1270 SPPP_LOCK(sp, RW_WRITER); 1271 1272 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1273 if (debug) 1274 log(LOG_DEBUG, 1275 "%s: cisco invalid packet length: %d bytes\n", 1276 ifp->if_xname, m->m_pkthdr.len); 1277 SPPP_UNLOCK(sp); 1278 return; 1279 } 1280 h = mtod(m, struct cisco_packet *); 1281 if (debug) 1282 log(LOG_DEBUG, 1283 "%s: cisco input: %d bytes " 1284 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1285 ifp->if_xname, m->m_pkthdr.len, 1286 ntohl(h->type), h->par1, h->par2, (u_int)h->rel, 1287 (u_int)h->time0, (u_int)h->time1); 1288 switch (ntohl(h->type)) { 1289 default: 1290 if (debug) 1291 addlog("%s: cisco unknown packet type: 0x%x\n", 1292 ifp->if_xname, ntohl(h->type)); 1293 break; 1294 case CISCO_ADDR_REPLY: 1295 /* Reply on address request, ignore */ 1296 break; 1297 case CISCO_KEEPALIVE_REQ: 1298 sp->pp_alivecnt = 0; 1299 sp->pp_rseq[IDX_LCP] = ntohl(h->par1); 1300 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1301 /* Local and remote sequence numbers are equal. 1302 * Probably, the line is in loopback mode. */ 1303 if (sp->pp_loopcnt >= LOOPALIVECNT) { 1304 printf ("%s: loopback\n", 1305 ifp->if_xname); 1306 sp->pp_loopcnt = 0; 1307 if (ifp->if_flags & IFF_UP) { 1308 SPPP_UNLOCK(sp); 1309 if_down(ifp); 1310 SPPP_LOCK(sp, RW_WRITER); 1311 1312 IF_PURGE(&sp->pp_cpq); 1313 } 1314 } 1315 ++sp->pp_loopcnt; 1316 1317 /* Generate new local sequence number */ 1318 sp->pp_seq[IDX_LCP] = cprng_fast32(); 1319 break; 1320 } 1321 sp->pp_loopcnt = 0; 1322 if (! (ifp->if_flags & IFF_UP) && 1323 (ifp->if_flags & IFF_RUNNING)) { 1324 SPPP_UNLOCK(sp); 1325 if_up(ifp); 1326 SPPP_LOCK(sp, RW_WRITER); 1327 } 1328 break; 1329 case CISCO_ADDR_REQ: 1330 #ifdef INET 1331 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1332 if (me != 0L) 1333 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1334 #endif 1335 break; 1336 } 1337 SPPP_UNLOCK(sp); 1338 } 1339 1340 /* 1341 * Send Cisco keepalive packet. 1342 */ 1343 static void 1344 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1345 { 1346 STDDCL; 1347 struct ppp_header *h; 1348 struct cisco_packet *ch; 1349 struct mbuf *m; 1350 uint32_t t; 1351 1352 KASSERT(SPPP_WLOCKED(sp)); 1353 1354 t = time_uptime * 1000; 1355 MGETHDR(m, M_DONTWAIT, MT_DATA); 1356 if (! m) 1357 return; 1358 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1359 m_reset_rcvif(m); 1360 1361 h = mtod(m, struct ppp_header *); 1362 h->address = CISCO_MULTICAST; 1363 h->control = 0; 1364 h->protocol = htons(CISCO_KEEPALIVE); 1365 1366 ch = (struct cisco_packet *)(h + 1); 1367 ch->type = htonl(type); 1368 ch->par1 = htonl(par1); 1369 ch->par2 = htonl(par2); 1370 ch->rel = -1; 1371 1372 ch->time0 = htons((u_short)(t >> 16)); 1373 ch->time1 = htons((u_short) t); 1374 1375 if (debug) 1376 log(LOG_DEBUG, 1377 "%s: cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1378 ifp->if_xname, ntohl(ch->type), ch->par1, 1379 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1380 (u_int)ch->time1); 1381 1382 if (IF_QFULL(&sp->pp_cpq)) { 1383 IF_DROP(&sp->pp_fastq); 1384 IF_DROP(&ifp->if_snd); 1385 m_freem(m); 1386 if_statinc(ifp, if_oerrors); 1387 return; 1388 } 1389 1390 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 1391 IF_ENQUEUE(&sp->pp_cpq, m); 1392 1393 if (! (ifp->if_flags & IFF_OACTIVE)) { 1394 SPPP_UNLOCK(sp); 1395 if_start_lock(ifp); 1396 SPPP_LOCK(sp, RW_WRITER); 1397 } 1398 } 1399 1400 /* 1401 * PPP protocol implementation. 1402 */ 1403 1404 /* 1405 * Send PPP control protocol packet. 1406 */ 1407 static void 1408 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1409 u_char ident, u_short len, void *data) 1410 { 1411 STDDCL; 1412 struct lcp_header *lh; 1413 struct mbuf *m; 1414 size_t pkthdrlen; 1415 1416 KASSERT(SPPP_WLOCKED(sp)); 1417 1418 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1419 1420 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1421 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1422 MGETHDR(m, M_DONTWAIT, MT_DATA); 1423 if (! m) { 1424 return; 1425 } 1426 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1427 m_reset_rcvif(m); 1428 1429 if (sp->pp_flags & PP_NOFRAMING) { 1430 *mtod(m, uint16_t *) = htons(proto); 1431 lh = (struct lcp_header *)(mtod(m, uint8_t *) + 2); 1432 } else { 1433 struct ppp_header *h; 1434 h = mtod(m, struct ppp_header *); 1435 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1436 h->control = PPP_UI; /* Unnumbered Info */ 1437 h->protocol = htons(proto); /* Link Control Protocol */ 1438 lh = (struct lcp_header *)(h + 1); 1439 } 1440 lh->type = type; 1441 lh->ident = ident; 1442 lh->len = htons(LCP_HEADER_LEN + len); 1443 if (len) 1444 memcpy(lh + 1, data, len); 1445 1446 if (debug) { 1447 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 1448 ifp->if_xname, 1449 sppp_proto_name(proto), 1450 sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len)); 1451 if (len) 1452 sppp_print_bytes((u_char *)(lh + 1), len); 1453 addlog(">\n"); 1454 } 1455 if (IF_QFULL(&sp->pp_cpq)) { 1456 IF_DROP(&sp->pp_fastq); 1457 IF_DROP(&ifp->if_snd); 1458 m_freem(m); 1459 if_statinc(ifp, if_oerrors); 1460 return; 1461 } 1462 1463 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 1464 IF_ENQUEUE(&sp->pp_cpq, m); 1465 1466 1467 if (! (ifp->if_flags & IFF_OACTIVE)) { 1468 SPPP_UNLOCK(sp); 1469 if_start_lock(ifp); 1470 SPPP_LOCK(sp, RW_WRITER); 1471 } 1472 } 1473 1474 /* 1475 * Handle incoming PPP control protocol packets. 1476 */ 1477 static void 1478 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1479 { 1480 STDDCL; 1481 struct lcp_header *h; 1482 int printlen, len = m->m_pkthdr.len; 1483 int rv; 1484 u_char *p; 1485 uint32_t u32; 1486 1487 SPPP_LOCK(sp, RW_WRITER); 1488 1489 if (len < 4) { 1490 if (debug) 1491 log(LOG_DEBUG, 1492 "%s: %s invalid packet length: %d bytes\n", 1493 ifp->if_xname, cp->name, len); 1494 SPPP_UNLOCK(sp); 1495 return; 1496 } 1497 h = mtod(m, struct lcp_header *); 1498 if (debug) { 1499 printlen = ntohs(h->len); 1500 log(LOG_DEBUG, 1501 "%s: %s input(%s): <%s id=0x%x len=%d", 1502 ifp->if_xname, cp->name, 1503 sppp_state_name(sp->state[cp->protoidx]), 1504 sppp_cp_type_name(h->type), h->ident, printlen); 1505 if (len < printlen) 1506 printlen = len; 1507 if (printlen > 4) 1508 sppp_print_bytes((u_char *)(h + 1), printlen - 4); 1509 addlog(">\n"); 1510 } 1511 if (len > ntohs(h->len)) 1512 len = ntohs(h->len); 1513 p = (u_char *)(h + 1); 1514 switch (h->type) { 1515 case CONF_REQ: 1516 if (len < 4) { 1517 if (debug) 1518 addlog("%s: %s invalid conf-req length %d\n", 1519 ifp->if_xname, cp->name, 1520 len); 1521 if_statinc(ifp, if_ierrors); 1522 break; 1523 } 1524 /* handle states where RCR doesn't get a SCA/SCN */ 1525 switch (sp->state[cp->protoidx]) { 1526 case STATE_CLOSING: 1527 case STATE_STOPPING: 1528 SPPP_UNLOCK(sp); 1529 return; 1530 case STATE_CLOSED: 1531 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1532 0, 0); 1533 SPPP_UNLOCK(sp); 1534 return; 1535 } 1536 rv = (cp->RCR)(sp, h, len); 1537 if (rv < 0) { 1538 /* fatal error, shut down */ 1539 (cp->tld)(sp); 1540 sppp_lcp_tlf(sp); 1541 SPPP_UNLOCK(sp); 1542 return; 1543 } 1544 switch (sp->state[cp->protoidx]) { 1545 case STATE_OPENED: 1546 (cp->tld)(sp); 1547 (cp->scr)(sp); 1548 /* fall through... */ 1549 case STATE_ACK_SENT: 1550 case STATE_REQ_SENT: 1551 sppp_cp_change_state(cp, sp, rv? 1552 STATE_ACK_SENT: STATE_REQ_SENT); 1553 break; 1554 case STATE_STOPPED: 1555 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1556 (cp->scr)(sp); 1557 sppp_cp_change_state(cp, sp, rv? 1558 STATE_ACK_SENT: STATE_REQ_SENT); 1559 break; 1560 case STATE_ACK_RCVD: 1561 if (rv) { 1562 sppp_cp_change_state(cp, sp, STATE_OPENED); 1563 if (debug) 1564 log(LOG_DEBUG, "%s: %s tlu\n", 1565 ifp->if_xname, 1566 cp->name); 1567 (cp->tlu)(sp); 1568 } else 1569 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1570 break; 1571 default: 1572 printf("%s: %s illegal %s in state %s\n", 1573 ifp->if_xname, cp->name, 1574 sppp_cp_type_name(h->type), 1575 sppp_state_name(sp->state[cp->protoidx])); 1576 if_statinc(ifp, if_ierrors); 1577 } 1578 break; 1579 case CONF_ACK: 1580 if (h->ident != sp->confid[cp->protoidx]) { 1581 if (debug) 1582 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1583 ifp->if_xname, cp->name, 1584 h->ident, sp->confid[cp->protoidx]); 1585 if_statinc(ifp, if_ierrors); 1586 break; 1587 } 1588 switch (sp->state[cp->protoidx]) { 1589 case STATE_CLOSED: 1590 case STATE_STOPPED: 1591 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1592 break; 1593 case STATE_CLOSING: 1594 case STATE_STOPPING: 1595 break; 1596 case STATE_REQ_SENT: 1597 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1598 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1599 break; 1600 case STATE_OPENED: 1601 (cp->tld)(sp); 1602 /* fall through */ 1603 case STATE_ACK_RCVD: 1604 (cp->scr)(sp); 1605 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1606 break; 1607 case STATE_ACK_SENT: 1608 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1609 sppp_cp_change_state(cp, sp, STATE_OPENED); 1610 if (debug) 1611 log(LOG_DEBUG, "%s: %s tlu\n", 1612 ifp->if_xname, cp->name); 1613 (cp->tlu)(sp); 1614 break; 1615 default: 1616 printf("%s: %s illegal %s in state %s\n", 1617 ifp->if_xname, cp->name, 1618 sppp_cp_type_name(h->type), 1619 sppp_state_name(sp->state[cp->protoidx])); 1620 if_statinc(ifp, if_ierrors); 1621 } 1622 break; 1623 case CONF_NAK: 1624 case CONF_REJ: 1625 if (h->ident != sp->confid[cp->protoidx]) { 1626 if (debug) 1627 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1628 ifp->if_xname, cp->name, 1629 h->ident, sp->confid[cp->protoidx]); 1630 if_statinc(ifp, if_ierrors); 1631 break; 1632 } 1633 if (h->type == CONF_NAK) 1634 (cp->RCN_nak)(sp, h, len); 1635 else /* CONF_REJ */ 1636 (cp->RCN_rej)(sp, h, len); 1637 1638 switch (sp->state[cp->protoidx]) { 1639 case STATE_CLOSED: 1640 case STATE_STOPPED: 1641 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1642 break; 1643 case STATE_REQ_SENT: 1644 case STATE_ACK_SENT: 1645 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1646 (cp->scr)(sp); 1647 break; 1648 case STATE_OPENED: 1649 (cp->tld)(sp); 1650 /* fall through */ 1651 case STATE_ACK_RCVD: 1652 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1653 (cp->scr)(sp); 1654 break; 1655 case STATE_CLOSING: 1656 case STATE_STOPPING: 1657 break; 1658 default: 1659 printf("%s: %s illegal %s in state %s\n", 1660 ifp->if_xname, cp->name, 1661 sppp_cp_type_name(h->type), 1662 sppp_state_name(sp->state[cp->protoidx])); 1663 if_statinc(ifp, if_ierrors); 1664 } 1665 break; 1666 1667 case TERM_REQ: 1668 switch (sp->state[cp->protoidx]) { 1669 case STATE_ACK_RCVD: 1670 case STATE_ACK_SENT: 1671 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1672 /* fall through */ 1673 case STATE_CLOSED: 1674 case STATE_STOPPED: 1675 case STATE_CLOSING: 1676 case STATE_STOPPING: 1677 case STATE_REQ_SENT: 1678 sta: 1679 /* Send Terminate-Ack packet. */ 1680 if (debug) 1681 log(LOG_DEBUG, "%s: %s send terminate-ack\n", 1682 ifp->if_xname, cp->name); 1683 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1684 break; 1685 case STATE_OPENED: 1686 (cp->tld)(sp); 1687 sp->rst_counter[cp->protoidx] = 0; 1688 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1689 goto sta; 1690 default: 1691 printf("%s: %s illegal %s in state %s\n", 1692 ifp->if_xname, cp->name, 1693 sppp_cp_type_name(h->type), 1694 sppp_state_name(sp->state[cp->protoidx])); 1695 if_statinc(ifp, if_ierrors); 1696 } 1697 break; 1698 case TERM_ACK: 1699 switch (sp->state[cp->protoidx]) { 1700 case STATE_CLOSED: 1701 case STATE_STOPPED: 1702 case STATE_REQ_SENT: 1703 case STATE_ACK_SENT: 1704 break; 1705 case STATE_CLOSING: 1706 (cp->tlf)(sp); 1707 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1708 sppp_lcp_check_and_close(sp); 1709 break; 1710 case STATE_STOPPING: 1711 (cp->tlf)(sp); 1712 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1713 sppp_lcp_check_and_close(sp); 1714 break; 1715 case STATE_ACK_RCVD: 1716 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1717 break; 1718 case STATE_OPENED: 1719 (cp->tld)(sp); 1720 (cp->scr)(sp); 1721 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1722 break; 1723 default: 1724 printf("%s: %s illegal %s in state %s\n", 1725 ifp->if_xname, cp->name, 1726 sppp_cp_type_name(h->type), 1727 sppp_state_name(sp->state[cp->protoidx])); 1728 if_statinc(ifp, if_ierrors); 1729 } 1730 break; 1731 case CODE_REJ: 1732 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1733 log(LOG_INFO, 1734 "%s: %s: ignoring RXJ (%s) for code ?, " 1735 "danger will robinson\n", 1736 ifp->if_xname, cp->name, 1737 sppp_cp_type_name(h->type)); 1738 switch (sp->state[cp->protoidx]) { 1739 case STATE_CLOSED: 1740 case STATE_STOPPED: 1741 case STATE_REQ_SENT: 1742 case STATE_ACK_SENT: 1743 case STATE_CLOSING: 1744 case STATE_STOPPING: 1745 case STATE_OPENED: 1746 break; 1747 case STATE_ACK_RCVD: 1748 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1749 break; 1750 default: 1751 printf("%s: %s illegal %s in state %s\n", 1752 ifp->if_xname, cp->name, 1753 sppp_cp_type_name(h->type), 1754 sppp_state_name(sp->state[cp->protoidx])); 1755 if_statinc(ifp, if_ierrors); 1756 } 1757 break; 1758 case PROTO_REJ: 1759 { 1760 int catastrophic; 1761 const struct cp *upper; 1762 int i; 1763 uint16_t proto; 1764 1765 catastrophic = 0; 1766 upper = NULL; 1767 proto = p[0] << 8 | p[1]; 1768 for (i = 0; i < IDX_COUNT; i++) { 1769 if (cps[i]->proto == proto) { 1770 upper = cps[i]; 1771 break; 1772 } 1773 } 1774 if (upper == NULL) 1775 catastrophic++; 1776 1777 if (debug) 1778 log(LOG_INFO, 1779 "%s: %s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1780 ifp->if_xname, cp->name, catastrophic ? '-' : '+', 1781 sppp_cp_type_name(h->type), proto, 1782 upper ? upper->name : "unknown", 1783 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1784 1785 /* 1786 * if we got RXJ+ against conf-req, the peer does not implement 1787 * this particular protocol type. terminate the protocol. 1788 */ 1789 if (upper && !catastrophic) { 1790 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1791 upper->Close(sp); 1792 break; 1793 } 1794 } 1795 1796 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1797 switch (sp->state[cp->protoidx]) { 1798 case STATE_CLOSED: 1799 case STATE_STOPPED: 1800 case STATE_REQ_SENT: 1801 case STATE_ACK_SENT: 1802 case STATE_CLOSING: 1803 case STATE_STOPPING: 1804 case STATE_OPENED: 1805 break; 1806 case STATE_ACK_RCVD: 1807 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1808 break; 1809 default: 1810 printf("%s: %s illegal %s in state %s\n", 1811 ifp->if_xname, cp->name, 1812 sppp_cp_type_name(h->type), 1813 sppp_state_name(sp->state[cp->protoidx])); 1814 if_statinc(ifp, if_ierrors); 1815 } 1816 break; 1817 } 1818 case DISC_REQ: 1819 if (cp->proto != PPP_LCP) 1820 goto illegal; 1821 /* Discard the packet. */ 1822 break; 1823 case ECHO_REQ: 1824 if (cp->proto != PPP_LCP) 1825 goto illegal; 1826 if (sp->state[cp->protoidx] != STATE_OPENED) { 1827 if (debug) 1828 addlog("%s: lcp echo req but lcp closed\n", 1829 ifp->if_xname); 1830 if_statinc(ifp, if_ierrors); 1831 break; 1832 } 1833 if (len < 8) { 1834 if (debug) 1835 addlog("%s: invalid lcp echo request " 1836 "packet length: %d bytes\n", 1837 ifp->if_xname, len); 1838 break; 1839 } 1840 memcpy(&u32, h + 1, sizeof u32); 1841 if (ntohl(u32) == sp->lcp.magic) { 1842 /* Line loopback mode detected. */ 1843 printf("%s: loopback\n", ifp->if_xname); 1844 SPPP_UNLOCK(sp); 1845 if_down(ifp); 1846 SPPP_LOCK(sp, RW_WRITER); 1847 1848 IF_PURGE(&sp->pp_cpq); 1849 1850 /* Shut down the PPP link. */ 1851 /* XXX */ 1852 lcp.Down(sp); 1853 lcp.Up(sp); 1854 break; 1855 } 1856 u32 = htonl(sp->lcp.magic); 1857 memcpy(h + 1, &u32, sizeof u32); 1858 if (debug) 1859 addlog("%s: got lcp echo req, sending echo rep\n", 1860 ifp->if_xname); 1861 sppp_cp_send(sp, PPP_LCP, ECHO_REPLY, h->ident, len - 4, 1862 h + 1); 1863 break; 1864 case ECHO_REPLY: 1865 if (cp->proto != PPP_LCP) 1866 goto illegal; 1867 if (h->ident != sp->lcp.echoid) { 1868 if_statinc(ifp, if_ierrors); 1869 break; 1870 } 1871 if (len < 8) { 1872 if (debug) 1873 addlog("%s: lcp invalid echo reply " 1874 "packet length: %d bytes\n", 1875 ifp->if_xname, len); 1876 break; 1877 } 1878 if (debug) 1879 addlog("%s: lcp got echo rep\n", 1880 ifp->if_xname); 1881 memcpy(&u32, h + 1, sizeof u32); 1882 if (ntohl(u32) != sp->lcp.magic) 1883 sp->pp_alivecnt = 0; 1884 break; 1885 default: 1886 /* Unknown packet type -- send Code-Reject packet. */ 1887 illegal: 1888 if (debug) 1889 addlog("%s: %s send code-rej for 0x%x\n", 1890 ifp->if_xname, cp->name, h->type); 1891 sppp_cp_send(sp, cp->proto, CODE_REJ, 1892 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1893 if_statinc(ifp, if_ierrors); 1894 } 1895 1896 SPPP_UNLOCK(sp); 1897 } 1898 1899 1900 /* 1901 * The generic part of all Up/Down/Open/Close/TO event handlers. 1902 * Basically, the state transition handling in the automaton. 1903 */ 1904 static void 1905 sppp_up_event(const struct cp *cp, struct sppp *sp) 1906 { 1907 STDDCL; 1908 1909 KASSERT(SPPP_WLOCKED(sp)); 1910 1911 if (debug) 1912 log(LOG_DEBUG, "%s: %s up(%s)\n", 1913 ifp->if_xname, cp->name, 1914 sppp_state_name(sp->state[cp->protoidx])); 1915 1916 switch (sp->state[cp->protoidx]) { 1917 case STATE_INITIAL: 1918 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1919 break; 1920 case STATE_STARTING: 1921 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1922 (cp->scr)(sp); 1923 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1924 break; 1925 default: 1926 printf("%s: %s illegal up in state %s\n", 1927 ifp->if_xname, cp->name, 1928 sppp_state_name(sp->state[cp->protoidx])); 1929 } 1930 } 1931 1932 static void 1933 sppp_down_event(const struct cp *cp, struct sppp *sp) 1934 { 1935 STDDCL; 1936 1937 KASSERT(SPPP_WLOCKED(sp)); 1938 1939 if (debug) 1940 log(LOG_DEBUG, "%s: %s down(%s)\n", 1941 ifp->if_xname, cp->name, 1942 sppp_state_name(sp->state[cp->protoidx])); 1943 1944 switch (sp->state[cp->protoidx]) { 1945 case STATE_CLOSED: 1946 case STATE_CLOSING: 1947 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1948 break; 1949 case STATE_STOPPED: 1950 (cp->tls)(sp); 1951 /* fall through */ 1952 case STATE_STOPPING: 1953 case STATE_REQ_SENT: 1954 case STATE_ACK_RCVD: 1955 case STATE_ACK_SENT: 1956 sppp_cp_change_state(cp, sp, STATE_STARTING); 1957 break; 1958 case STATE_OPENED: 1959 (cp->tld)(sp); 1960 sppp_cp_change_state(cp, sp, STATE_STARTING); 1961 break; 1962 default: 1963 printf("%s: %s illegal down in state %s\n", 1964 ifp->if_xname, cp->name, 1965 sppp_state_name(sp->state[cp->protoidx])); 1966 } 1967 } 1968 1969 1970 static void 1971 sppp_open_event(const struct cp *cp, struct sppp *sp) 1972 { 1973 STDDCL; 1974 1975 KASSERT(SPPP_WLOCKED(sp)); 1976 1977 if (debug) 1978 log(LOG_DEBUG, "%s: %s open(%s)\n", 1979 ifp->if_xname, cp->name, 1980 sppp_state_name(sp->state[cp->protoidx])); 1981 1982 switch (sp->state[cp->protoidx]) { 1983 case STATE_INITIAL: 1984 sppp_cp_change_state(cp, sp, STATE_STARTING); 1985 (cp->tls)(sp); 1986 break; 1987 case STATE_STARTING: 1988 break; 1989 case STATE_CLOSED: 1990 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1991 (cp->scr)(sp); 1992 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1993 break; 1994 case STATE_STOPPED: 1995 case STATE_STOPPING: 1996 case STATE_REQ_SENT: 1997 case STATE_ACK_RCVD: 1998 case STATE_ACK_SENT: 1999 case STATE_OPENED: 2000 break; 2001 case STATE_CLOSING: 2002 sppp_cp_change_state(cp, sp, STATE_STOPPING); 2003 break; 2004 } 2005 } 2006 2007 2008 static void 2009 sppp_close_event(const struct cp *cp, struct sppp *sp) 2010 { 2011 STDDCL; 2012 2013 KASSERT(SPPP_WLOCKED(sp)); 2014 2015 if (debug) 2016 log(LOG_DEBUG, "%s: %s close(%s)\n", 2017 ifp->if_xname, cp->name, 2018 sppp_state_name(sp->state[cp->protoidx])); 2019 2020 switch (sp->state[cp->protoidx]) { 2021 case STATE_INITIAL: 2022 case STATE_CLOSED: 2023 case STATE_CLOSING: 2024 break; 2025 case STATE_STARTING: 2026 sppp_cp_change_state(cp, sp, STATE_INITIAL); 2027 (cp->tlf)(sp); 2028 break; 2029 case STATE_STOPPED: 2030 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2031 break; 2032 case STATE_STOPPING: 2033 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2034 break; 2035 case STATE_OPENED: 2036 (cp->tld)(sp); 2037 /* fall through */ 2038 case STATE_REQ_SENT: 2039 case STATE_ACK_RCVD: 2040 case STATE_ACK_SENT: 2041 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 2042 sppp_cp_send(sp, cp->proto, TERM_REQ, 2043 ++sp->pp_seq[cp->protoidx], 0, 0); 2044 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2045 break; 2046 } 2047 } 2048 2049 static void 2050 sppp_to_event(const struct cp *cp, struct sppp *sp) 2051 { 2052 STDDCL; 2053 int s; 2054 2055 KASSERT(SPPP_WLOCKED(sp)); 2056 2057 s = splnet(); 2058 2059 if (debug) 2060 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 2061 ifp->if_xname, cp->name, 2062 sppp_state_name(sp->state[cp->protoidx]), 2063 sp->rst_counter[cp->protoidx]); 2064 2065 if (--sp->rst_counter[cp->protoidx] < 0) 2066 /* TO- event */ 2067 switch (sp->state[cp->protoidx]) { 2068 case STATE_CLOSING: 2069 (cp->tlf)(sp); 2070 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2071 sppp_lcp_check_and_close(sp); 2072 break; 2073 case STATE_STOPPING: 2074 (cp->tlf)(sp); 2075 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2076 sppp_lcp_check_and_close(sp); 2077 break; 2078 case STATE_REQ_SENT: 2079 case STATE_ACK_RCVD: 2080 case STATE_ACK_SENT: 2081 (cp->tlf)(sp); 2082 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2083 sppp_lcp_check_and_close(sp); 2084 break; 2085 } 2086 else 2087 /* TO+ event */ 2088 switch (sp->state[cp->protoidx]) { 2089 case STATE_CLOSING: 2090 case STATE_STOPPING: 2091 sppp_cp_send(sp, cp->proto, TERM_REQ, 2092 ++sp->pp_seq[cp->protoidx], 0, 0); 2093 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 2094 cp->TO, sp); 2095 break; 2096 case STATE_REQ_SENT: 2097 case STATE_ACK_RCVD: 2098 (cp->scr)(sp); 2099 /* sppp_cp_change_state() will restart the timer */ 2100 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2101 break; 2102 case STATE_ACK_SENT: 2103 (cp->scr)(sp); 2104 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 2105 cp->TO, sp); 2106 break; 2107 } 2108 2109 splx(s); 2110 } 2111 2112 /* 2113 * Change the state of a control protocol in the state automaton. 2114 * Takes care of starting/stopping the restart timer. 2115 */ 2116 void 2117 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 2118 { 2119 2120 KASSERT(SPPP_WLOCKED(sp)); 2121 2122 sp->state[cp->protoidx] = newstate; 2123 callout_stop(&sp->ch[cp->protoidx]); 2124 switch (newstate) { 2125 case STATE_INITIAL: 2126 case STATE_STARTING: 2127 case STATE_CLOSED: 2128 case STATE_STOPPED: 2129 case STATE_OPENED: 2130 break; 2131 case STATE_CLOSING: 2132 case STATE_STOPPING: 2133 case STATE_REQ_SENT: 2134 case STATE_ACK_RCVD: 2135 case STATE_ACK_SENT: 2136 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 2137 cp->TO, sp); 2138 break; 2139 } 2140 } 2141 2142 /* 2143 *--------------------------------------------------------------------------* 2144 * * 2145 * The LCP implementation. * 2146 * * 2147 *--------------------------------------------------------------------------* 2148 */ 2149 static void 2150 sppp_lcp_init(struct sppp *sp) 2151 { 2152 2153 KASSERT(SPPP_WLOCKED(sp)); 2154 2155 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 2156 sp->lcp.magic = 0; 2157 sp->state[IDX_LCP] = STATE_INITIAL; 2158 sp->fail_counter[IDX_LCP] = 0; 2159 sp->pp_seq[IDX_LCP] = 0; 2160 sp->pp_rseq[IDX_LCP] = 0; 2161 sp->lcp.protos = 0; 2162 2163 /* 2164 * Initialize counters and timeout values. Note that we don't 2165 * use the 3 seconds suggested in RFC 1661 since we are likely 2166 * running on a fast link. XXX We should probably implement 2167 * the exponential backoff option. Note that these values are 2168 * relevant for all control protocols, not just LCP only. 2169 */ 2170 sp->lcp.timeout = 1 * hz; 2171 sp->lcp.max_terminate = 2; 2172 sp->lcp.max_configure = 10; 2173 sp->lcp.max_failure = 10; 2174 callout_init(&sp->ch[IDX_LCP], CALLOUT_MPSAFE); 2175 } 2176 2177 static void 2178 sppp_lcp_up(struct sppp *sp) 2179 { 2180 STDDCL; 2181 2182 KASSERT(SPPP_WLOCKED(sp)); 2183 2184 /* Initialize activity timestamp: opening a connection is an activity */ 2185 sp->pp_last_receive = sp->pp_last_activity = time_uptime; 2186 2187 /* 2188 * If this interface is passive or dial-on-demand, and we are 2189 * still in Initial state, it means we've got an incoming 2190 * call. Activate the interface. 2191 */ 2192 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2193 if (debug) 2194 log(LOG_DEBUG, 2195 "%s: Up event", ifp->if_xname); 2196 ifp->if_flags |= IFF_RUNNING; 2197 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2198 if (debug) 2199 addlog("(incoming call)\n"); 2200 sp->pp_flags |= PP_CALLIN; 2201 lcp.Open(sp); 2202 } else if (debug) 2203 addlog("\n"); 2204 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && 2205 (sp->state[IDX_LCP] == STATE_INITIAL)) { 2206 ifp->if_flags |= IFF_RUNNING; 2207 lcp.Open(sp); 2208 } 2209 2210 sppp_up_event(&lcp, sp); 2211 } 2212 2213 static void 2214 sppp_lcp_down(struct sppp *sp) 2215 { 2216 STDDCL; 2217 2218 KASSERT(SPPP_WLOCKED(sp)); 2219 2220 sppp_down_event(&lcp, sp); 2221 2222 /* 2223 * If this is neither a dial-on-demand nor a passive 2224 * interface, simulate an ``ifconfig down'' action, so the 2225 * administrator can force a redial by another ``ifconfig 2226 * up''. XXX For leased line operation, should we immediately 2227 * try to reopen the connection here? 2228 */ 2229 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2230 if (debug) 2231 log(LOG_INFO, 2232 "%s: Down event (carrier loss), taking interface down.\n", 2233 ifp->if_xname); 2234 SPPP_UNLOCK(sp); 2235 if_down(ifp); 2236 SPPP_LOCK(sp, RW_WRITER); 2237 } else { 2238 if (debug) 2239 log(LOG_DEBUG, 2240 "%s: Down event (carrier loss)\n", 2241 ifp->if_xname); 2242 } 2243 sp->fail_counter[IDX_LCP] = 0; 2244 sp->pp_flags &= ~PP_CALLIN; 2245 if (sp->state[IDX_LCP] != STATE_INITIAL) 2246 lcp.Close(sp); 2247 ifp->if_flags &= ~IFF_RUNNING; 2248 } 2249 2250 static void 2251 sppp_lcp_open(struct sppp *sp) 2252 { 2253 2254 KASSERT(SPPP_WLOCKED(sp)); 2255 2256 if (sp->pp_if.if_mtu < PP_MTU) { 2257 sp->lcp.mru = sp->pp_if.if_mtu; 2258 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2259 } else 2260 sp->lcp.mru = PP_MTU; 2261 sp->lcp.their_mru = PP_MTU; 2262 2263 /* 2264 * If we are authenticator, negotiate LCP_AUTH 2265 */ 2266 if (sp->hisauth.proto != 0) 2267 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2268 else 2269 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2270 sp->pp_flags &= ~PP_NEEDAUTH; 2271 sppp_open_event(&lcp, sp); 2272 } 2273 2274 static void 2275 sppp_lcp_close(struct sppp *sp) 2276 { 2277 2278 KASSERT(SPPP_WLOCKED(sp)); 2279 sppp_close_event(&lcp, sp); 2280 } 2281 2282 static void 2283 sppp_lcp_TO(void *cookie) 2284 { 2285 struct sppp *sp = (struct sppp*)cookie; 2286 2287 SPPP_LOCK(sp, RW_WRITER); 2288 sppp_to_event(&lcp, sp); 2289 SPPP_UNLOCK(sp); 2290 } 2291 2292 /* 2293 * Analyze a configure request. Return true if it was agreeable, and 2294 * caused action sca, false if it has been rejected or nak'ed, and 2295 * caused action scn. (The return value is used to make the state 2296 * transition decision in the state automaton.) 2297 */ 2298 static int 2299 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2300 { 2301 STDDCL; 2302 u_char *buf, *r, *p, l, blen; 2303 int origlen, rlen; 2304 uint32_t nmagic; 2305 u_short authproto; 2306 2307 KASSERT(SPPP_WLOCKED(sp)); 2308 2309 len -= 4; 2310 origlen = len; 2311 buf = r = malloc (blen = len, M_TEMP, M_NOWAIT); 2312 if (! buf) 2313 return (0); 2314 2315 if (debug) 2316 log(LOG_DEBUG, "%s: lcp parse opts:", 2317 ifp->if_xname); 2318 2319 /* pass 1: check for things that need to be rejected */ 2320 p = (void *)(h + 1); 2321 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2322 /* Sanity check option length */ 2323 if (l > len) { 2324 /* 2325 * Malicious option - drop immediately. 2326 * XXX Maybe we should just RXJ it? 2327 */ 2328 addlog("%s: received malicious LCP option 0x%02x, " 2329 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp->if_xname, 2330 p[0], l, len); 2331 goto drop; 2332 } 2333 if (debug) 2334 addlog(" %s", sppp_lcp_opt_name(*p)); 2335 switch (*p) { 2336 case LCP_OPT_MAGIC: 2337 /* Magic number. */ 2338 /* fall through, both are same length */ 2339 case LCP_OPT_ASYNC_MAP: 2340 /* Async control character map. */ 2341 if (len >= 6 || l == 6) 2342 continue; 2343 if (debug) 2344 addlog(" [invalid]"); 2345 break; 2346 case LCP_OPT_MP_EID: 2347 if (len >= l && l >= 3) { 2348 switch (p[2]) { 2349 case 0: if (l==3+ 0) continue;break; 2350 case 2: if (l==3+ 4) continue;break; 2351 case 3: if (l==3+ 6) continue;break; 2352 case 6: if (l==3+16) continue;break; 2353 case 1: /* FALLTHROUGH */ 2354 case 4: if (l<=3+20) continue;break; 2355 case 5: if (l<=3+15) continue;break; 2356 /* XXX should it be default: continue;? */ 2357 } 2358 } 2359 if (debug) 2360 addlog(" [invalid class %d len %d]", p[2], l); 2361 break; 2362 case LCP_OPT_MP_SSNHF: 2363 if (len >= 2 && l == 2) { 2364 if (debug) 2365 addlog(" [rej]"); 2366 break; 2367 } 2368 if (debug) 2369 addlog(" [invalid]"); 2370 break; 2371 case LCP_OPT_MP_MRRU: 2372 /* Multilink maximum received reconstructed unit */ 2373 /* should be fall through, both are same length */ 2374 /* FALLTHROUGH */ 2375 case LCP_OPT_MRU: 2376 /* Maximum receive unit. */ 2377 if (len >= 4 && l == 4) 2378 continue; 2379 if (debug) 2380 addlog(" [invalid]"); 2381 break; 2382 case LCP_OPT_AUTH_PROTO: 2383 if (len < 4) { 2384 if (debug) 2385 addlog(" [invalid]"); 2386 break; 2387 } 2388 authproto = (p[2] << 8) + p[3]; 2389 if (authproto == PPP_CHAP && l != 5) { 2390 if (debug) 2391 addlog(" [invalid chap len]"); 2392 break; 2393 } 2394 if (sp->myauth.proto == 0) { 2395 /* we are not configured to do auth */ 2396 if (debug) 2397 addlog(" [not configured]"); 2398 break; 2399 } 2400 /* 2401 * Remote want us to authenticate, remember this, 2402 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2403 * up. 2404 */ 2405 sp->pp_flags |= PP_NEEDAUTH; 2406 continue; 2407 default: 2408 /* Others not supported. */ 2409 if (debug) 2410 addlog(" [rej]"); 2411 break; 2412 } 2413 if (rlen + l > blen) { 2414 if (debug) 2415 addlog(" [overflow]"); 2416 continue; 2417 } 2418 /* Add the option to rejected list. */ 2419 memcpy(r, p, l); 2420 r += l; 2421 rlen += l; 2422 } 2423 if (rlen) { 2424 if (debug) 2425 addlog(" send conf-rej\n"); 2426 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2427 goto end; 2428 } else if (debug) 2429 addlog("\n"); 2430 2431 /* 2432 * pass 2: check for option values that are unacceptable and 2433 * thus require to be nak'ed. 2434 */ 2435 if (debug) 2436 log(LOG_DEBUG, "%s: lcp parse opt values: ", 2437 ifp->if_xname); 2438 2439 p = (void *)(h + 1); 2440 len = origlen; 2441 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2442 if (debug) 2443 addlog(" %s", sppp_lcp_opt_name(*p)); 2444 switch (*p) { 2445 case LCP_OPT_MAGIC: 2446 /* Magic number -- extract. */ 2447 nmagic = (uint32_t)p[2] << 24 | 2448 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2449 if (nmagic != sp->lcp.magic) { 2450 if (debug) 2451 addlog(" 0x%x", nmagic); 2452 continue; 2453 } 2454 /* 2455 * Local and remote magics equal -- loopback? 2456 */ 2457 if (sp->pp_loopcnt >= LOOPALIVECNT*5) { 2458 printf ("%s: loopback\n", 2459 ifp->if_xname); 2460 sp->pp_loopcnt = 0; 2461 if (ifp->if_flags & IFF_UP) { 2462 SPPP_UNLOCK(sp); 2463 if_down(ifp); 2464 SPPP_LOCK(sp, RW_WRITER); 2465 2466 IF_PURGE(&sp->pp_cpq); 2467 /* XXX ? */ 2468 lcp.Down(sp); 2469 lcp.Up(sp); 2470 } 2471 } else if (debug) 2472 addlog(" [glitch]"); 2473 ++sp->pp_loopcnt; 2474 /* 2475 * We negate our magic here, and NAK it. If 2476 * we see it later in an NAK packet, we 2477 * suggest a new one. 2478 */ 2479 nmagic = ~sp->lcp.magic; 2480 /* Gonna NAK it. */ 2481 p[2] = nmagic >> 24; 2482 p[3] = nmagic >> 16; 2483 p[4] = nmagic >> 8; 2484 p[5] = nmagic; 2485 break; 2486 2487 case LCP_OPT_ASYNC_MAP: 2488 /* 2489 * Async control character map -- just ignore it. 2490 * 2491 * Quote from RFC 1662, chapter 6: 2492 * To enable this functionality, synchronous PPP 2493 * implementations MUST always respond to the 2494 * Async-Control-Character-Map Configuration 2495 * Option with the LCP Configure-Ack. However, 2496 * acceptance of the Configuration Option does 2497 * not imply that the synchronous implementation 2498 * will do any ACCM mapping. Instead, all such 2499 * octet mapping will be performed by the 2500 * asynchronous-to-synchronous converter. 2501 */ 2502 continue; 2503 2504 case LCP_OPT_MRU: 2505 /* 2506 * Maximum receive unit. Always agreeable, 2507 * but ignored by now. 2508 */ 2509 sp->lcp.their_mru = p[2] * 256 + p[3]; 2510 if (debug) 2511 addlog(" %ld", sp->lcp.their_mru); 2512 continue; 2513 2514 case LCP_OPT_AUTH_PROTO: 2515 authproto = (p[2] << 8) + p[3]; 2516 if (sp->myauth.proto != authproto) { 2517 /* not agreed, nak */ 2518 if (debug) 2519 addlog(" [mine %s != his %s]", 2520 sppp_proto_name(sp->myauth.proto), 2521 sppp_proto_name(authproto)); 2522 p[2] = sp->myauth.proto >> 8; 2523 p[3] = sp->myauth.proto; 2524 break; 2525 } 2526 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2527 if (debug) 2528 addlog(" [chap not MD5]"); 2529 p[4] = CHAP_MD5; 2530 break; 2531 } 2532 continue; 2533 case LCP_OPT_MP_EID: 2534 /* 2535 * Endpoint identification. 2536 * Always agreeable, 2537 * but ignored by now. 2538 */ 2539 if (debug) { 2540 addlog(" type %d", p[2]); 2541 sppp_print_bytes(p+3, p[1]-3); 2542 } 2543 continue; 2544 case LCP_OPT_MP_MRRU: 2545 /* 2546 * Maximum received reconstructed unit. 2547 * Always agreeable, 2548 * but ignored by now. 2549 */ 2550 sp->lcp.their_mrru = p[2] * 256 + p[3]; 2551 if (debug) 2552 addlog(" %ld", sp->lcp.their_mrru); 2553 continue; 2554 } 2555 if (rlen + l > blen) { 2556 if (debug) 2557 addlog(" [overflow]"); 2558 continue; 2559 } 2560 /* Add the option to nak'ed list. */ 2561 memcpy(r, p, l); 2562 r += l; 2563 rlen += l; 2564 } 2565 if (rlen) { 2566 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2567 if (debug) 2568 addlog(" max_failure (%d) exceeded, " 2569 "send conf-rej\n", 2570 sp->lcp.max_failure); 2571 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2572 } else { 2573 if (debug) 2574 addlog(" send conf-nak\n"); 2575 sppp_cp_send(sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2576 } 2577 goto end; 2578 } else { 2579 if (debug) 2580 addlog(" send conf-ack\n"); 2581 sp->fail_counter[IDX_LCP] = 0; 2582 sp->pp_loopcnt = 0; 2583 sppp_cp_send(sp, PPP_LCP, CONF_ACK, h->ident, origlen, h + 1); 2584 } 2585 2586 end: 2587 free(buf, M_TEMP); 2588 return (rlen == 0); 2589 2590 drop: 2591 free(buf, M_TEMP); 2592 return -1; 2593 } 2594 2595 /* 2596 * Analyze the LCP Configure-Reject option list, and adjust our 2597 * negotiation. 2598 */ 2599 static void 2600 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2601 { 2602 STDDCL; 2603 u_char *buf, *p, l; 2604 2605 KASSERT(SPPP_WLOCKED(sp)); 2606 2607 len -= 4; 2608 buf = malloc (len, M_TEMP, M_NOWAIT); 2609 if (!buf) 2610 return; 2611 2612 if (debug) 2613 log(LOG_DEBUG, "%s: lcp rej opts:", 2614 ifp->if_xname); 2615 2616 p = (void *)(h + 1); 2617 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2618 /* Sanity check option length */ 2619 if (l > len) { 2620 /* 2621 * Malicious option - drop immediately. 2622 * XXX Maybe we should just RXJ it? 2623 */ 2624 addlog("%s: received malicious LCP option, " 2625 "dropping.\n", ifp->if_xname); 2626 goto drop; 2627 } 2628 if (debug) 2629 addlog(" %s", sppp_lcp_opt_name(*p)); 2630 switch (*p) { 2631 case LCP_OPT_MAGIC: 2632 /* Magic number -- can't use it, use 0 */ 2633 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2634 sp->lcp.magic = 0; 2635 break; 2636 case LCP_OPT_MRU: 2637 /* 2638 * We try to negotiate a lower MRU if the underlying 2639 * link's MTU is less than PP_MTU (e.g. PPPoE). If the 2640 * peer rejects this lower rate, fallback to the 2641 * default. 2642 */ 2643 if (debug) { 2644 addlog("%s: warning: peer rejected our MRU of " 2645 "%ld bytes. Defaulting to %d bytes\n", 2646 ifp->if_xname, sp->lcp.mru, PP_MTU); 2647 } 2648 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2649 sp->lcp.mru = PP_MTU; 2650 break; 2651 case LCP_OPT_AUTH_PROTO: 2652 /* 2653 * Peer doesn't want to authenticate himself, 2654 * deny unless this is a dialout call, and 2655 * SPPP_AUTHFLAG_NOCALLOUT is set. 2656 */ 2657 if ((sp->pp_flags & PP_CALLIN) == 0 && 2658 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2659 if (debug) 2660 addlog(" [don't insist on auth " 2661 "for callout]"); 2662 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2663 break; 2664 } 2665 if (debug) 2666 addlog("[access denied]\n"); 2667 lcp.Close(sp); 2668 break; 2669 } 2670 } 2671 if (debug) 2672 addlog("\n"); 2673 drop: 2674 free(buf, M_TEMP); 2675 return; 2676 } 2677 2678 /* 2679 * Analyze the LCP Configure-NAK option list, and adjust our 2680 * negotiation. 2681 */ 2682 static void 2683 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2684 { 2685 STDDCL; 2686 u_char *buf, *p, l, blen; 2687 uint32_t magic; 2688 2689 KASSERT(SPPP_WLOCKED(sp)); 2690 2691 len -= 4; 2692 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 2693 if (!buf) 2694 return; 2695 2696 if (debug) 2697 log(LOG_DEBUG, "%s: lcp nak opts:", 2698 ifp->if_xname); 2699 2700 p = (void *)(h + 1); 2701 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2702 /* Sanity check option length */ 2703 if (l > len) { 2704 /* 2705 * Malicious option - drop immediately. 2706 * XXX Maybe we should just RXJ it? 2707 */ 2708 addlog("%s: received malicious LCP option, " 2709 "dropping.\n", ifp->if_xname); 2710 goto drop; 2711 } 2712 if (debug) 2713 addlog(" %s", sppp_lcp_opt_name(*p)); 2714 switch (*p) { 2715 case LCP_OPT_MAGIC: 2716 /* Magic number -- renegotiate */ 2717 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2718 len >= 6 && l == 6) { 2719 magic = (uint32_t)p[2] << 24 | 2720 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2721 /* 2722 * If the remote magic is our negated one, 2723 * this looks like a loopback problem. 2724 * Suggest a new magic to make sure. 2725 */ 2726 if (magic == ~sp->lcp.magic) { 2727 if (debug) 2728 addlog(" magic glitch"); 2729 sp->lcp.magic = cprng_fast32(); 2730 } else { 2731 sp->lcp.magic = magic; 2732 if (debug) 2733 addlog(" %d", magic); 2734 } 2735 } 2736 break; 2737 case LCP_OPT_MRU: 2738 /* 2739 * Peer wants to advise us to negotiate an MRU. 2740 * Agree on it if it's reasonable, or use 2741 * default otherwise. 2742 */ 2743 if (len >= 4 && l == 4) { 2744 u_int mru = p[2] * 256 + p[3]; 2745 if (debug) 2746 addlog(" %d", mru); 2747 if (mru < PPP_MINMRU || mru > sp->pp_if.if_mtu) 2748 mru = sp->pp_if.if_mtu; 2749 sp->lcp.mru = mru; 2750 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2751 } 2752 break; 2753 case LCP_OPT_AUTH_PROTO: 2754 /* 2755 * Peer doesn't like our authentication method, 2756 * deny. 2757 */ 2758 if (debug) 2759 addlog("[access denied]\n"); 2760 lcp.Close(sp); 2761 break; 2762 } 2763 } 2764 if (debug) 2765 addlog("\n"); 2766 drop: 2767 free(buf, M_TEMP); 2768 return; 2769 } 2770 2771 static void 2772 sppp_lcp_tlu(struct sppp *sp) 2773 { 2774 struct ifnet *ifp = &sp->pp_if; 2775 int i; 2776 uint32_t mask; 2777 2778 KASSERT(SPPP_WLOCKED(sp)); 2779 2780 /* XXX ? */ 2781 if (! (ifp->if_flags & IFF_UP) && 2782 (ifp->if_flags & IFF_RUNNING)) { 2783 /* Coming out of loopback mode. */ 2784 SPPP_UNLOCK(sp); 2785 if_up(ifp); 2786 SPPP_LOCK(sp, RW_WRITER); 2787 } 2788 2789 for (i = 0; i < IDX_COUNT; i++) 2790 if ((cps[i])->flags & CP_QUAL) 2791 (cps[i])->Open(sp); 2792 2793 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2794 (sp->pp_flags & PP_NEEDAUTH) != 0) 2795 sppp_change_phase(sp, SPPP_PHASE_AUTHENTICATE); 2796 else 2797 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 2798 2799 /* 2800 * Open all authentication protocols. This is even required 2801 * if we already proceeded to network phase, since it might be 2802 * that remote wants us to authenticate, so we might have to 2803 * send a PAP request. Undesired authentication protocols 2804 * don't do anything when they get an Open event. 2805 */ 2806 for (i = 0; i < IDX_COUNT; i++) 2807 if ((cps[i])->flags & CP_AUTH) 2808 (cps[i])->Open(sp); 2809 2810 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2811 /* Notify all NCPs. */ 2812 for (i = 0; i < IDX_COUNT; i++) 2813 if ((cps[i])->flags & CP_NCP) 2814 (cps[i])->Open(sp); 2815 } 2816 2817 /* Send Up events to all started protos. */ 2818 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) { 2819 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2820 (cps[i])->Up(sp); 2821 } 2822 } 2823 2824 /* notify low-level driver of state change */ 2825 sppp_notify_chg_wlocked(sp); 2826 2827 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2828 /* if no NCP is starting, close down */ 2829 sppp_lcp_check_and_close(sp); 2830 } 2831 2832 static void 2833 sppp_lcp_tld(struct sppp *sp) 2834 { 2835 int i; 2836 uint32_t mask; 2837 2838 KASSERT(SPPP_WLOCKED(sp)); 2839 2840 sppp_change_phase(sp, SPPP_PHASE_TERMINATE); 2841 2842 /* 2843 * Take upper layers down. We send the Down event first and 2844 * the Close second to prevent the upper layers from sending 2845 * ``a flurry of terminate-request packets'', as the RFC 2846 * describes it. 2847 */ 2848 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) { 2849 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2850 (cps[i])->Down(sp); 2851 (cps[i])->Close(sp); 2852 } 2853 } 2854 } 2855 2856 static void 2857 sppp_lcp_tls(struct sppp *sp) 2858 { 2859 2860 KASSERT(SPPP_WLOCKED(sp)); 2861 2862 2863 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2864 printf("%s: authentication failed %d times, not retrying again\n", 2865 sp->pp_if.if_xname, sp->pp_auth_failures); 2866 2867 SPPP_UNLOCK(sp); 2868 if_down(&sp->pp_if); 2869 SPPP_LOCK(sp, RW_WRITER); 2870 return; 2871 } 2872 2873 sppp_change_phase(sp, SPPP_PHASE_ESTABLISH); 2874 2875 /* Notify lower layer if desired. */ 2876 sppp_notify_tls_wlocked(sp); 2877 } 2878 2879 static void 2880 sppp_lcp_tlf(struct sppp *sp) 2881 { 2882 2883 KASSERT(SPPP_WLOCKED(sp)); 2884 2885 sppp_change_phase(sp, SPPP_PHASE_DEAD); 2886 2887 /* Notify lower layer if desired. */ 2888 sppp_notify_tlf_wlocked(sp); 2889 } 2890 2891 static void 2892 sppp_lcp_scr(struct sppp *sp) 2893 { 2894 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2895 int i = 0; 2896 u_short authproto; 2897 2898 KASSERT(SPPP_WLOCKED(sp)); 2899 2900 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2901 if (! sp->lcp.magic) 2902 sp->lcp.magic = cprng_fast32(); 2903 opt[i++] = LCP_OPT_MAGIC; 2904 opt[i++] = 6; 2905 opt[i++] = sp->lcp.magic >> 24; 2906 opt[i++] = sp->lcp.magic >> 16; 2907 opt[i++] = sp->lcp.magic >> 8; 2908 opt[i++] = sp->lcp.magic; 2909 } 2910 2911 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2912 opt[i++] = LCP_OPT_MRU; 2913 opt[i++] = 4; 2914 opt[i++] = sp->lcp.mru >> 8; 2915 opt[i++] = sp->lcp.mru; 2916 } 2917 2918 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2919 authproto = sp->hisauth.proto; 2920 opt[i++] = LCP_OPT_AUTH_PROTO; 2921 opt[i++] = authproto == PPP_CHAP? 5: 4; 2922 opt[i++] = authproto >> 8; 2923 opt[i++] = authproto; 2924 if (authproto == PPP_CHAP) 2925 opt[i++] = CHAP_MD5; 2926 } 2927 2928 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2929 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2930 } 2931 2932 /* 2933 * Check the open NCPs, return true if at least one NCP is open. 2934 */ 2935 static int 2936 sppp_ncp_check(struct sppp *sp) 2937 { 2938 int i, mask; 2939 2940 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2941 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2942 return 1; 2943 return 0; 2944 } 2945 2946 /* 2947 * Re-check the open NCPs and see if we should terminate the link. 2948 * Called by the NCPs during their tlf action handling. 2949 */ 2950 static void 2951 sppp_lcp_check_and_close(struct sppp *sp) 2952 { 2953 2954 KASSERT(SPPP_WLOCKED(sp)); 2955 2956 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2957 /* don't bother, we are already going down */ 2958 return; 2959 2960 if (sppp_ncp_check(sp)) 2961 return; 2962 lcp.Close(sp); 2963 } 2964 2965 2966 /* 2967 *--------------------------------------------------------------------------* 2968 * * 2969 * The IPCP implementation. * 2970 * * 2971 *--------------------------------------------------------------------------* 2972 */ 2973 2974 static void 2975 sppp_ipcp_init(struct sppp *sp) 2976 { 2977 int error; 2978 2979 KASSERT(SPPP_WLOCKED(sp)); 2980 2981 sp->ipcp.opts = 0; 2982 sp->ipcp.flags = 0; 2983 sp->state[IDX_IPCP] = STATE_INITIAL; 2984 sp->fail_counter[IDX_IPCP] = 0; 2985 sp->pp_seq[IDX_IPCP] = 0; 2986 sp->pp_rseq[IDX_IPCP] = 0; 2987 callout_init(&sp->ch[IDX_IPCP], CALLOUT_MPSAFE); 2988 2989 error = workqueue_create(&sp->ipcp.update_addrs_wq, "ipcp_addr", 2990 sppp_update_ip_addrs_work, sp, PRI_SOFTNET, IPL_NET, 0); 2991 if (error) 2992 panic("%s: update_addrs workqueue_create failed (%d)\n", 2993 __func__, error); 2994 sp->ipcp.update_addrs_q = pcq_create(IPCP_UPDATE_LIMIT, KM_SLEEP); 2995 2996 sp->ipcp.update_addrs_enqueued = 0; 2997 } 2998 2999 static void 3000 sppp_ipcp_up(struct sppp *sp) 3001 { 3002 KASSERT(SPPP_WLOCKED(sp)); 3003 sppp_up_event(&ipcp, sp); 3004 } 3005 3006 static void 3007 sppp_ipcp_down(struct sppp *sp) 3008 { 3009 KASSERT(SPPP_WLOCKED(sp)); 3010 sppp_down_event(&ipcp, sp); 3011 } 3012 3013 static void 3014 sppp_ipcp_open(struct sppp *sp) 3015 { 3016 STDDCL; 3017 uint32_t myaddr, hisaddr; 3018 3019 KASSERT(SPPP_WLOCKED(sp)); 3020 3021 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 3022 sp->ipcp.req_myaddr = 0; 3023 sp->ipcp.req_hisaddr = 0; 3024 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 3025 3026 #ifdef INET 3027 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3028 #else 3029 myaddr = hisaddr = 0; 3030 #endif 3031 /* 3032 * If we don't have his address, this probably means our 3033 * interface doesn't want to talk IP at all. (This could 3034 * be the case if somebody wants to speak only IPX, for 3035 * example.) Don't open IPCP in this case. 3036 */ 3037 if (hisaddr == 0) { 3038 /* XXX this message should go away */ 3039 if (debug) 3040 log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n", 3041 ifp->if_xname); 3042 return; 3043 } 3044 3045 if (myaddr == 0) { 3046 /* 3047 * I don't have an assigned address, so i need to 3048 * negotiate my address. 3049 */ 3050 sp->ipcp.flags |= IPCP_MYADDR_DYN; 3051 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3052 } 3053 if (hisaddr == 1) { 3054 /* 3055 * XXX - remove this hack! 3056 * remote has no valid address, we need to get one assigned. 3057 */ 3058 sp->ipcp.flags |= IPCP_HISADDR_DYN; 3059 } 3060 sppp_open_event(&ipcp, sp); 3061 } 3062 3063 static void 3064 sppp_ipcp_close(struct sppp *sp) 3065 { 3066 3067 KASSERT(SPPP_WLOCKED(sp)); 3068 3069 sppp_close_event(&ipcp, sp); 3070 3071 #ifdef INET 3072 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 3073 /* 3074 * Some address was dynamic, clear it again. 3075 */ 3076 sppp_clear_ip_addrs(sp); 3077 #endif 3078 } 3079 3080 static void 3081 sppp_ipcp_TO(void *cookie) 3082 { 3083 struct sppp *sp = cookie; 3084 3085 SPPP_LOCK(sp, RW_WRITER); 3086 sppp_to_event(&ipcp, sp); 3087 SPPP_UNLOCK(sp); 3088 } 3089 3090 /* 3091 * Analyze a configure request. Return true if it was agreeable, and 3092 * caused action sca, false if it has been rejected or nak'ed, and 3093 * caused action scn. (The return value is used to make the state 3094 * transition decision in the state automaton.) 3095 */ 3096 static int 3097 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3098 { 3099 u_char *buf, *r, *p, l, blen; 3100 struct ifnet *ifp = &sp->pp_if; 3101 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3102 uint32_t hisaddr, desiredaddr; 3103 3104 KASSERT(SPPP_WLOCKED(sp)); 3105 3106 len -= 4; 3107 origlen = len; 3108 /* 3109 * Make sure to allocate a buf that can at least hold a 3110 * conf-nak with an `address' option. We might need it below. 3111 */ 3112 blen = len < 6 ? 6 : len; 3113 buf = r = malloc (blen, M_TEMP, M_NOWAIT); 3114 if (! buf) 3115 return (0); 3116 3117 /* pass 1: see if we can recognize them */ 3118 if (debug) 3119 log(LOG_DEBUG, "%s: ipcp parse opts:", 3120 ifp->if_xname); 3121 p = (void *)(h + 1); 3122 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3123 /* Sanity check option length */ 3124 if (l > len) { 3125 /* XXX should we just RXJ? */ 3126 addlog("%s: malicious IPCP option received, dropping\n", 3127 ifp->if_xname); 3128 goto drop; 3129 } 3130 if (debug) 3131 addlog(" %s", sppp_ipcp_opt_name(*p)); 3132 switch (*p) { 3133 #ifdef notyet 3134 case IPCP_OPT_COMPRESSION: 3135 if (len >= 6 && l >= 6) { 3136 /* correctly formed compress option */ 3137 continue; 3138 } 3139 if (debug) 3140 addlog(" [invalid]"); 3141 break; 3142 #endif 3143 case IPCP_OPT_ADDRESS: 3144 if (len >= 6 && l == 6) { 3145 /* correctly formed address option */ 3146 continue; 3147 } 3148 if (debug) 3149 addlog(" [invalid]"); 3150 break; 3151 default: 3152 /* Others not supported. */ 3153 if (debug) 3154 addlog(" [rej]"); 3155 break; 3156 } 3157 /* Add the option to rejected list. */ 3158 if (rlen + l > blen) { 3159 if (debug) 3160 addlog(" [overflow]"); 3161 continue; 3162 } 3163 memcpy(r, p, l); 3164 r += l; 3165 rlen += l; 3166 } 3167 if (rlen) { 3168 if (debug) 3169 addlog(" send conf-rej\n"); 3170 sppp_cp_send(sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 3171 goto end; 3172 } else if (debug) 3173 addlog("\n"); 3174 3175 /* pass 2: parse option values */ 3176 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 3177 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 3178 else 3179 #ifdef INET 3180 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 3181 #else 3182 hisaddr = 0; 3183 #endif 3184 if (debug) 3185 log(LOG_DEBUG, "%s: ipcp parse opt values: ", 3186 ifp->if_xname); 3187 p = (void *)(h + 1); 3188 len = origlen; 3189 for (rlen=0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3190 if (debug) 3191 addlog(" %s", sppp_ipcp_opt_name(*p)); 3192 switch (*p) { 3193 #ifdef notyet 3194 case IPCP_OPT_COMPRESSION: 3195 continue; 3196 #endif 3197 case IPCP_OPT_ADDRESS: 3198 desiredaddr = p[2] << 24 | p[3] << 16 | 3199 p[4] << 8 | p[5]; 3200 if (desiredaddr == hisaddr || 3201 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 3202 /* 3203 * Peer's address is same as our value, 3204 * this is agreeable. Gonna conf-ack 3205 * it. 3206 */ 3207 if (debug) 3208 addlog(" %s [ack]", 3209 sppp_dotted_quad(hisaddr)); 3210 /* record that we've seen it already */ 3211 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 3212 sp->ipcp.req_hisaddr = desiredaddr; 3213 hisaddr = desiredaddr; 3214 continue; 3215 } 3216 /* 3217 * The address wasn't agreeable. This is either 3218 * he sent us 0.0.0.0, asking to assign him an 3219 * address, or he send us another address not 3220 * matching our value. Either case, we gonna 3221 * conf-nak it with our value. 3222 */ 3223 if (debug) { 3224 if (desiredaddr == 0) 3225 addlog(" [addr requested]"); 3226 else 3227 addlog(" %s [not agreed]", 3228 sppp_dotted_quad(desiredaddr)); 3229 } 3230 3231 p[2] = hisaddr >> 24; 3232 p[3] = hisaddr >> 16; 3233 p[4] = hisaddr >> 8; 3234 p[5] = hisaddr; 3235 break; 3236 } 3237 if (rlen + l > blen) { 3238 if (debug) 3239 addlog(" [overflow]"); 3240 continue; 3241 } 3242 /* Add the option to nak'ed list. */ 3243 memcpy(r, p, l); 3244 r += l; 3245 rlen += l; 3246 } 3247 3248 /* 3249 * If we are about to conf-ack the request, but haven't seen 3250 * his address so far, gonna conf-nak it instead, with the 3251 * `address' option present and our idea of his address being 3252 * filled in there, to request negotiation of both addresses. 3253 * 3254 * XXX This can result in an endless req - nak loop if peer 3255 * doesn't want to send us his address. Q: What should we do 3256 * about it? XXX A: implement the max-failure counter. 3257 */ 3258 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 3259 buf[0] = IPCP_OPT_ADDRESS; 3260 buf[1] = 6; 3261 buf[2] = hisaddr >> 24; 3262 buf[3] = hisaddr >> 16; 3263 buf[4] = hisaddr >> 8; 3264 buf[5] = hisaddr; 3265 rlen = 6; 3266 if (debug) 3267 addlog(" still need hisaddr"); 3268 } 3269 3270 if (rlen) { 3271 if (debug) 3272 addlog(" send conf-nak\n"); 3273 sppp_cp_send(sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 3274 } else { 3275 if (debug) 3276 addlog(" send conf-ack\n"); 3277 sppp_cp_send(sp, PPP_IPCP, CONF_ACK, h->ident, origlen, h + 1); 3278 } 3279 3280 end: 3281 free(buf, M_TEMP); 3282 return (rlen == 0); 3283 3284 drop: 3285 free(buf, M_TEMP); 3286 return -1; 3287 } 3288 3289 /* 3290 * Analyze the IPCP Configure-Reject option list, and adjust our 3291 * negotiation. 3292 */ 3293 static void 3294 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3295 { 3296 u_char *buf, *p, l, blen; 3297 struct ifnet *ifp = &sp->pp_if; 3298 int debug = ifp->if_flags & IFF_DEBUG; 3299 3300 KASSERT(SPPP_WLOCKED(sp)); 3301 3302 len -= 4; 3303 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 3304 if (!buf) 3305 return; 3306 3307 if (debug) 3308 log(LOG_DEBUG, "%s: ipcp rej opts:", 3309 ifp->if_xname); 3310 3311 p = (void *)(h + 1); 3312 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3313 /* Sanity check option length */ 3314 if (l > len) { 3315 /* XXX should we just RXJ? */ 3316 addlog("%s: malicious IPCP option received, dropping\n", 3317 ifp->if_xname); 3318 goto drop; 3319 } 3320 if (debug) 3321 addlog(" %s", sppp_ipcp_opt_name(*p)); 3322 switch (*p) { 3323 case IPCP_OPT_ADDRESS: 3324 /* 3325 * Peer doesn't grok address option. This is 3326 * bad. XXX Should we better give up here? 3327 */ 3328 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 3329 break; 3330 #ifdef notyet 3331 case IPCP_OPT_COMPRESS: 3332 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 3333 break; 3334 #endif 3335 } 3336 } 3337 if (debug) 3338 addlog("\n"); 3339 drop: 3340 free(buf, M_TEMP); 3341 return; 3342 } 3343 3344 /* 3345 * Analyze the IPCP Configure-NAK option list, and adjust our 3346 * negotiation. 3347 */ 3348 static void 3349 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3350 { 3351 u_char *p, l; 3352 struct ifnet *ifp = &sp->pp_if; 3353 int debug = ifp->if_flags & IFF_DEBUG; 3354 uint32_t wantaddr; 3355 3356 KASSERT(SPPP_WLOCKED(sp)); 3357 3358 len -= 4; 3359 3360 if (debug) 3361 log(LOG_DEBUG, "%s: ipcp nak opts:", 3362 ifp->if_xname); 3363 3364 p = (void *)(h + 1); 3365 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3366 /* Sanity check option length */ 3367 if (l > len) { 3368 /* XXX should we just RXJ? */ 3369 addlog("%s: malicious IPCP option received, dropping\n", 3370 ifp->if_xname); 3371 return; 3372 } 3373 if (debug) 3374 addlog(" %s", sppp_ipcp_opt_name(*p)); 3375 switch (*p) { 3376 case IPCP_OPT_ADDRESS: 3377 /* 3378 * Peer doesn't like our local IP address. See 3379 * if we can do something for him. We'll drop 3380 * him our address then. 3381 */ 3382 if (len >= 6 && l == 6) { 3383 wantaddr = p[2] << 24 | p[3] << 16 | 3384 p[4] << 8 | p[5]; 3385 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3386 if (debug) 3387 addlog(" [wantaddr %s]", 3388 sppp_dotted_quad(wantaddr)); 3389 /* 3390 * When doing dynamic address assignment, 3391 * we accept his offer. Otherwise, we 3392 * ignore it and thus continue to negotiate 3393 * our already existing value. 3394 */ 3395 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3396 if (debug) 3397 addlog(" [agree]"); 3398 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3399 sp->ipcp.req_myaddr = wantaddr; 3400 } 3401 } 3402 break; 3403 3404 case IPCP_OPT_PRIMDNS: 3405 if (len >= 6 && l == 6) { 3406 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3407 p[4] << 8 | p[5]; 3408 } 3409 break; 3410 3411 case IPCP_OPT_SECDNS: 3412 if (len >= 6 && l == 6) { 3413 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3414 p[4] << 8 | p[5]; 3415 } 3416 break; 3417 #ifdef notyet 3418 case IPCP_OPT_COMPRESS: 3419 /* 3420 * Peer wants different compression parameters. 3421 */ 3422 break; 3423 #endif 3424 } 3425 } 3426 if (debug) 3427 addlog("\n"); 3428 } 3429 3430 static void 3431 sppp_ipcp_tlu(struct sppp *sp) 3432 { 3433 #ifdef INET 3434 KASSERT(SPPP_WLOCKED(sp)); 3435 /* we are up. Set addresses and notify anyone interested */ 3436 sppp_set_ip_addrs(sp); 3437 #endif 3438 } 3439 3440 static void 3441 sppp_ipcp_tld(struct sppp *sp) 3442 { 3443 3444 KASSERT(SPPP_WLOCKED(sp)); 3445 } 3446 3447 static void 3448 sppp_ipcp_tls(struct sppp *sp) 3449 { 3450 3451 KASSERT(SPPP_WLOCKED(sp)); 3452 /* indicate to LCP that it must stay alive */ 3453 sp->lcp.protos |= (1 << IDX_IPCP); 3454 } 3455 3456 static void 3457 sppp_ipcp_tlf(struct sppp *sp) 3458 { 3459 3460 KASSERT(SPPP_WLOCKED(sp)); 3461 3462 /* we no longer need LCP */ 3463 sp->lcp.protos &= ~(1 << IDX_IPCP); 3464 } 3465 3466 static void 3467 sppp_ipcp_scr(struct sppp *sp) 3468 { 3469 uint8_t opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3470 #ifdef INET 3471 uint32_t ouraddr; 3472 #endif 3473 int i = 0; 3474 3475 KASSERT(SPPP_WLOCKED(sp)); 3476 3477 #ifdef notyet 3478 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3479 opt[i++] = IPCP_OPT_COMPRESSION; 3480 opt[i++] = 6; 3481 opt[i++] = 0; /* VJ header compression */ 3482 opt[i++] = 0x2d; /* VJ header compression */ 3483 opt[i++] = max_slot_id; 3484 opt[i++] = comp_slot_id; 3485 } 3486 #endif 3487 3488 #ifdef INET 3489 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3490 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3491 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3492 else 3493 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3494 opt[i++] = IPCP_OPT_ADDRESS; 3495 opt[i++] = 6; 3496 opt[i++] = ouraddr >> 24; 3497 opt[i++] = ouraddr >> 16; 3498 opt[i++] = ouraddr >> 8; 3499 opt[i++] = ouraddr; 3500 } 3501 #endif 3502 3503 if (sp->query_dns & 1) { 3504 opt[i++] = IPCP_OPT_PRIMDNS; 3505 opt[i++] = 6; 3506 opt[i++] = sp->dns_addrs[0] >> 24; 3507 opt[i++] = sp->dns_addrs[0] >> 16; 3508 opt[i++] = sp->dns_addrs[0] >> 8; 3509 opt[i++] = sp->dns_addrs[0]; 3510 } 3511 if (sp->query_dns & 2) { 3512 opt[i++] = IPCP_OPT_SECDNS; 3513 opt[i++] = 6; 3514 opt[i++] = sp->dns_addrs[1] >> 24; 3515 opt[i++] = sp->dns_addrs[1] >> 16; 3516 opt[i++] = sp->dns_addrs[1] >> 8; 3517 opt[i++] = sp->dns_addrs[1]; 3518 } 3519 3520 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3521 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3522 } 3523 3524 3525 /* 3526 *--------------------------------------------------------------------------* 3527 * * 3528 * The IPv6CP implementation. * 3529 * * 3530 *--------------------------------------------------------------------------* 3531 */ 3532 3533 #ifdef INET6 3534 static void 3535 sppp_ipv6cp_init(struct sppp *sp) 3536 { 3537 3538 KASSERT(SPPP_WLOCKED(sp)); 3539 3540 sp->ipv6cp.opts = 0; 3541 sp->ipv6cp.flags = 0; 3542 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3543 sp->fail_counter[IDX_IPV6CP] = 0; 3544 sp->pp_seq[IDX_IPV6CP] = 0; 3545 sp->pp_rseq[IDX_IPV6CP] = 0; 3546 callout_init(&sp->ch[IDX_IPV6CP], CALLOUT_MPSAFE); 3547 } 3548 3549 static void 3550 sppp_ipv6cp_up(struct sppp *sp) 3551 { 3552 3553 KASSERT(SPPP_WLOCKED(sp)); 3554 sppp_up_event(&ipv6cp, sp); 3555 } 3556 3557 static void 3558 sppp_ipv6cp_down(struct sppp *sp) 3559 { 3560 3561 KASSERT(SPPP_WLOCKED(sp)); 3562 sppp_down_event(&ipv6cp, sp); 3563 } 3564 3565 static void 3566 sppp_ipv6cp_open(struct sppp *sp) 3567 { 3568 STDDCL; 3569 struct in6_addr myaddr, hisaddr; 3570 3571 KASSERT(SPPP_WLOCKED(sp)); 3572 3573 #ifdef IPV6CP_MYIFID_DYN 3574 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3575 #else 3576 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3577 #endif 3578 3579 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3580 /* 3581 * If we don't have our address, this probably means our 3582 * interface doesn't want to talk IPv6 at all. (This could 3583 * be the case if somebody wants to speak only IPX, for 3584 * example.) Don't open IPv6CP in this case. 3585 */ 3586 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3587 /* XXX this message should go away */ 3588 if (debug) 3589 log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n", 3590 ifp->if_xname); 3591 return; 3592 } 3593 3594 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3595 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3596 sppp_open_event(&ipv6cp, sp); 3597 } 3598 3599 static void 3600 sppp_ipv6cp_close(struct sppp *sp) 3601 { 3602 3603 KASSERT(SPPP_WLOCKED(sp)); 3604 sppp_close_event(&ipv6cp, sp); 3605 } 3606 3607 static void 3608 sppp_ipv6cp_TO(void *cookie) 3609 { 3610 struct sppp *sp = cookie; 3611 3612 SPPP_LOCK(sp, RW_WRITER); 3613 sppp_to_event(&ipv6cp, sp); 3614 SPPP_UNLOCK(sp); 3615 } 3616 3617 /* 3618 * Analyze a configure request. Return true if it was agreeable, and 3619 * caused action sca, false if it has been rejected or nak'ed, and 3620 * caused action scn. (The return value is used to make the state 3621 * transition decision in the state automaton.) 3622 */ 3623 static int 3624 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3625 { 3626 u_char *buf, *r, *p, l, blen; 3627 struct ifnet *ifp = &sp->pp_if; 3628 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3629 struct in6_addr myaddr, desiredaddr, suggestaddr; 3630 int ifidcount; 3631 int type; 3632 int collision, nohisaddr; 3633 char ip6buf[INET6_ADDRSTRLEN]; 3634 3635 KASSERT(SPPP_WLOCKED(sp)); 3636 3637 len -= 4; 3638 origlen = len; 3639 /* 3640 * Make sure to allocate a buf that can at least hold a 3641 * conf-nak with an `address' option. We might need it below. 3642 */ 3643 blen = len < 6 ? 6 : len; 3644 buf = r = malloc (blen, M_TEMP, M_NOWAIT); 3645 if (! buf) 3646 return (0); 3647 3648 /* pass 1: see if we can recognize them */ 3649 if (debug) 3650 log(LOG_DEBUG, "%s: ipv6cp parse opts:", 3651 ifp->if_xname); 3652 p = (void *)(h + 1); 3653 ifidcount = 0; 3654 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3655 /* Sanity check option length */ 3656 if (l > len) { 3657 /* XXX just RXJ? */ 3658 addlog("%s: received malicious IPCPv6 option, " 3659 "dropping\n", ifp->if_xname); 3660 goto drop; 3661 } 3662 if (debug) 3663 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3664 switch (*p) { 3665 case IPV6CP_OPT_IFID: 3666 if (len >= 10 && l == 10 && ifidcount == 0) { 3667 /* correctly formed address option */ 3668 ifidcount++; 3669 continue; 3670 } 3671 if (debug) 3672 addlog(" [invalid]"); 3673 break; 3674 #ifdef notyet 3675 case IPV6CP_OPT_COMPRESSION: 3676 if (len >= 4 && l >= 4) { 3677 /* correctly formed compress option */ 3678 continue; 3679 } 3680 if (debug) 3681 addlog(" [invalid]"); 3682 break; 3683 #endif 3684 default: 3685 /* Others not supported. */ 3686 if (debug) 3687 addlog(" [rej]"); 3688 break; 3689 } 3690 if (rlen + l > blen) { 3691 if (debug) 3692 addlog(" [overflow]"); 3693 continue; 3694 } 3695 /* Add the option to rejected list. */ 3696 memcpy(r, p, l); 3697 r += l; 3698 rlen += l; 3699 } 3700 if (rlen) { 3701 if (debug) 3702 addlog(" send conf-rej\n"); 3703 sppp_cp_send(sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3704 goto end; 3705 } else if (debug) 3706 addlog("\n"); 3707 3708 /* pass 2: parse option values */ 3709 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3710 if (debug) 3711 log(LOG_DEBUG, "%s: ipv6cp parse opt values: ", 3712 ifp->if_xname); 3713 p = (void *)(h + 1); 3714 len = origlen; 3715 type = CONF_ACK; 3716 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3717 if (debug) 3718 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3719 switch (*p) { 3720 #ifdef notyet 3721 case IPV6CP_OPT_COMPRESSION: 3722 continue; 3723 #endif 3724 case IPV6CP_OPT_IFID: 3725 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3726 memcpy(&desiredaddr.s6_addr[8], &p[2], 8); 3727 collision = (memcmp(&desiredaddr.s6_addr[8], 3728 &myaddr.s6_addr[8], 8) == 0); 3729 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3730 3731 desiredaddr.s6_addr16[0] = htons(0xfe80); 3732 (void)in6_setscope(&desiredaddr, &sp->pp_if, NULL); 3733 3734 if (!collision && !nohisaddr) { 3735 /* no collision, hisaddr known - Conf-Ack */ 3736 type = CONF_ACK; 3737 3738 if (debug) { 3739 addlog(" %s [%s]", 3740 IN6_PRINT(ip6buf, &desiredaddr), 3741 sppp_cp_type_name(type)); 3742 } 3743 continue; 3744 } 3745 3746 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3747 if (collision && nohisaddr) { 3748 /* collision, hisaddr unknown - Conf-Rej */ 3749 type = CONF_REJ; 3750 memset(&p[2], 0, 8); 3751 } else { 3752 /* 3753 * - no collision, hisaddr unknown, or 3754 * - collision, hisaddr known 3755 * Conf-Nak, suggest hisaddr 3756 */ 3757 type = CONF_NAK; 3758 sppp_suggest_ip6_addr(sp, &suggestaddr); 3759 memcpy(&p[2], &suggestaddr.s6_addr[8], 8); 3760 } 3761 if (debug) 3762 addlog(" %s [%s]", IN6_PRINT(ip6buf, &desiredaddr), 3763 sppp_cp_type_name(type)); 3764 break; 3765 } 3766 if (rlen + l > blen) { 3767 if (debug) 3768 addlog(" [overflow]"); 3769 continue; 3770 } 3771 /* Add the option to nak'ed list. */ 3772 memcpy(r, p, l); 3773 r += l; 3774 rlen += l; 3775 } 3776 3777 if (rlen == 0 && type == CONF_ACK) { 3778 if (debug) 3779 addlog(" send %s\n", sppp_cp_type_name(type)); 3780 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, origlen, h + 1); 3781 } else { 3782 #ifdef notdef 3783 if (type == CONF_ACK) 3784 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3785 #endif 3786 3787 if (debug) { 3788 addlog(" send %s suggest %s\n", 3789 sppp_cp_type_name(type), IN6_PRINT(ip6buf, &suggestaddr)); 3790 } 3791 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3792 } 3793 3794 end: 3795 free(buf, M_TEMP); 3796 return (rlen == 0); 3797 3798 drop: 3799 free(buf, M_TEMP); 3800 return -1; 3801 } 3802 3803 /* 3804 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3805 * negotiation. 3806 */ 3807 static void 3808 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3809 { 3810 u_char *buf, *p, l, blen; 3811 struct ifnet *ifp = &sp->pp_if; 3812 int debug = ifp->if_flags & IFF_DEBUG; 3813 3814 KASSERT(SPPP_WLOCKED(sp)); 3815 3816 len -= 4; 3817 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 3818 if (!buf) 3819 return; 3820 3821 if (debug) 3822 log(LOG_DEBUG, "%s: ipv6cp rej opts:", 3823 ifp->if_xname); 3824 3825 p = (void *)(h + 1); 3826 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3827 if (l > len) { 3828 /* XXX just RXJ? */ 3829 addlog("%s: received malicious IPCPv6 option, " 3830 "dropping\n", ifp->if_xname); 3831 goto drop; 3832 } 3833 if (debug) 3834 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3835 switch (*p) { 3836 case IPV6CP_OPT_IFID: 3837 /* 3838 * Peer doesn't grok address option. This is 3839 * bad. XXX Should we better give up here? 3840 */ 3841 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3842 break; 3843 #ifdef notyet 3844 case IPV6CP_OPT_COMPRESS: 3845 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3846 break; 3847 #endif 3848 } 3849 } 3850 if (debug) 3851 addlog("\n"); 3852 drop: 3853 free(buf, M_TEMP); 3854 return; 3855 } 3856 3857 /* 3858 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3859 * negotiation. 3860 */ 3861 static void 3862 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3863 { 3864 u_char *buf, *p, l, blen; 3865 struct ifnet *ifp = &sp->pp_if; 3866 int debug = ifp->if_flags & IFF_DEBUG; 3867 struct in6_addr suggestaddr; 3868 char ip6buf[INET6_ADDRSTRLEN]; 3869 3870 KASSERT(SPPP_WLOCKED(sp)); 3871 3872 len -= 4; 3873 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 3874 if (!buf) 3875 return; 3876 3877 if (debug) 3878 log(LOG_DEBUG, "%s: ipv6cp nak opts:", 3879 ifp->if_xname); 3880 3881 p = (void *)(h + 1); 3882 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3883 if (l > len) { 3884 /* XXX just RXJ? */ 3885 addlog("%s: received malicious IPCPv6 option, " 3886 "dropping\n", ifp->if_xname); 3887 goto drop; 3888 } 3889 if (debug) 3890 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3891 switch (*p) { 3892 case IPV6CP_OPT_IFID: 3893 /* 3894 * Peer doesn't like our local ifid. See 3895 * if we can do something for him. We'll drop 3896 * him our address then. 3897 */ 3898 if (len < 10 || l != 10) 3899 break; 3900 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3901 suggestaddr.s6_addr16[0] = htons(0xfe80); 3902 (void)in6_setscope(&suggestaddr, &sp->pp_if, NULL); 3903 memcpy(&suggestaddr.s6_addr[8], &p[2], 8); 3904 3905 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3906 if (debug) 3907 addlog(" [suggestaddr %s]", 3908 IN6_PRINT(ip6buf, &suggestaddr)); 3909 #ifdef IPV6CP_MYIFID_DYN 3910 /* 3911 * When doing dynamic address assignment, 3912 * we accept his offer. 3913 */ 3914 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3915 struct in6_addr lastsuggest; 3916 /* 3917 * If <suggested myaddr from peer> equals to 3918 * <hisaddr we have suggested last time>, 3919 * we have a collision. generate new random 3920 * ifid. 3921 */ 3922 sppp_suggest_ip6_addr(&lastsuggest); 3923 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3924 lastsuggest)) { 3925 if (debug) 3926 addlog(" [random]"); 3927 sppp_gen_ip6_addr(sp, &suggestaddr); 3928 } 3929 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3930 if (debug) 3931 addlog(" [agree]"); 3932 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3933 } 3934 #else 3935 /* 3936 * Since we do not do dynamic address assignment, 3937 * we ignore it and thus continue to negotiate 3938 * our already existing value. This can possibly 3939 * go into infinite request-reject loop. 3940 * 3941 * This is not likely because we normally use 3942 * ifid based on MAC-address. 3943 * If you have no ethernet card on the node, too bad. 3944 * XXX should we use fail_counter? 3945 */ 3946 #endif 3947 break; 3948 #ifdef notyet 3949 case IPV6CP_OPT_COMPRESS: 3950 /* 3951 * Peer wants different compression parameters. 3952 */ 3953 break; 3954 #endif 3955 } 3956 } 3957 if (debug) 3958 addlog("\n"); 3959 drop: 3960 free(buf, M_TEMP); 3961 return; 3962 } 3963 3964 static void 3965 sppp_ipv6cp_tlu(struct sppp *sp) 3966 { 3967 3968 KASSERT(SPPP_WLOCKED(sp)); 3969 /* we are up - notify isdn daemon */ 3970 sppp_notify_con_wlocked(sp); 3971 } 3972 3973 static void 3974 sppp_ipv6cp_tld(struct sppp *sp) 3975 { 3976 3977 KASSERT(SPPP_WLOCKED(sp)); 3978 } 3979 3980 static void 3981 sppp_ipv6cp_tls(struct sppp *sp) 3982 { 3983 3984 KASSERT(SPPP_WLOCKED(sp)); 3985 /* indicate to LCP that it must stay alive */ 3986 sp->lcp.protos |= (1 << IDX_IPV6CP); 3987 } 3988 3989 static void 3990 sppp_ipv6cp_tlf(struct sppp *sp) 3991 { 3992 3993 KASSERT(SPPP_WLOCKED(sp)); 3994 /* we no longer need LCP */ 3995 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3996 } 3997 3998 static void 3999 sppp_ipv6cp_scr(struct sppp *sp) 4000 { 4001 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 4002 struct in6_addr ouraddr; 4003 int i = 0; 4004 4005 KASSERT(SPPP_WLOCKED(sp)); 4006 4007 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 4008 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 4009 opt[i++] = IPV6CP_OPT_IFID; 4010 opt[i++] = 10; 4011 memcpy(&opt[i], &ouraddr.s6_addr[8], 8); 4012 i += 8; 4013 } 4014 4015 #ifdef notyet 4016 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 4017 opt[i++] = IPV6CP_OPT_COMPRESSION; 4018 opt[i++] = 4; 4019 opt[i++] = 0; /* TBD */ 4020 opt[i++] = 0; /* TBD */ 4021 /* variable length data may follow */ 4022 } 4023 #endif 4024 4025 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 4026 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 4027 } 4028 #else /*INET6*/ 4029 static void 4030 sppp_ipv6cp_init(struct sppp *sp) 4031 { 4032 4033 KASSERT(SPPP_WLOCKED(sp)); 4034 } 4035 4036 static void 4037 sppp_ipv6cp_up(struct sppp *sp) 4038 { 4039 4040 KASSERT(SPPP_WLOCKED(sp)); 4041 } 4042 4043 static void 4044 sppp_ipv6cp_down(struct sppp *sp) 4045 { 4046 4047 KASSERT(SPPP_WLOCKED(sp)); 4048 } 4049 4050 static void 4051 sppp_ipv6cp_open(struct sppp *sp) 4052 { 4053 4054 KASSERT(SPPP_WLOCKED(sp)); 4055 } 4056 4057 static void 4058 sppp_ipv6cp_close(struct sppp *sp) 4059 { 4060 4061 KASSERT(SPPP_WLOCKED(sp)); 4062 } 4063 4064 static void 4065 sppp_ipv6cp_TO(void *cookie) 4066 { 4067 struct sppp *sp __diagused = cookie; 4068 4069 KASSERT(SPPP_WLOCKED(sp)); 4070 } 4071 4072 static int 4073 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, 4074 int len) 4075 { 4076 4077 KASSERT(SPPP_WLOCKED(sp)); 4078 return 0; 4079 } 4080 4081 static void 4082 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, 4083 int len) 4084 { 4085 4086 KASSERT(SPPP_WLOCKED(sp)); 4087 } 4088 4089 static void 4090 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, 4091 int len) 4092 { 4093 4094 KASSERT(SPPP_WLOCKED(sp)); 4095 } 4096 4097 static void 4098 sppp_ipv6cp_tlu(struct sppp *sp) 4099 { 4100 4101 KASSERT(SPPP_WLOCKED(sp)); 4102 } 4103 4104 static void 4105 sppp_ipv6cp_tld(struct sppp *sp) 4106 { 4107 4108 KASSERT(SPPP_WLOCKED(sp)); 4109 } 4110 4111 static void 4112 sppp_ipv6cp_tls(struct sppp *sp) 4113 { 4114 4115 KASSERT(SPPP_WLOCKED(sp)); 4116 } 4117 4118 static void 4119 sppp_ipv6cp_tlf(struct sppp *sp) 4120 { 4121 4122 KASSERT(SPPP_WLOCKED(sp)); 4123 } 4124 4125 static void 4126 sppp_ipv6cp_scr(struct sppp *sp) 4127 { 4128 4129 KASSERT(SPPP_WLOCKED(sp)); 4130 } 4131 #endif /*INET6*/ 4132 4133 4134 /* 4135 *--------------------------------------------------------------------------* 4136 * * 4137 * The CHAP implementation. * 4138 * * 4139 *--------------------------------------------------------------------------* 4140 */ 4141 4142 /* 4143 * The authentication protocols don't employ a full-fledged state machine as 4144 * the control protocols do, since they do have Open and Close events, but 4145 * not Up and Down, nor are they explicitly terminated. Also, use of the 4146 * authentication protocols may be different in both directions (this makes 4147 * sense, think of a machine that never accepts incoming calls but only 4148 * calls out, it doesn't require the called party to authenticate itself). 4149 * 4150 * Our state machine for the local authentication protocol (we are requesting 4151 * the peer to authenticate) looks like: 4152 * 4153 * RCA- 4154 * +--------------------------------------------+ 4155 * V scn,tld| 4156 * +--------+ Close +---------+ RCA+ 4157 * | |<----------------------------------| |------+ 4158 * +--->| Closed | TO* | Opened | sca | 4159 * | | |-----+ +-------| |<-----+ 4160 * | +--------+ irc | | +---------+ 4161 * | ^ | | ^ 4162 * | | | | | 4163 * | | | | | 4164 * | TO-| | | | 4165 * | |tld TO+ V | | 4166 * | | +------->+ | | 4167 * | | | | | | 4168 * | +--------+ V | | 4169 * | | |<----+<--------------------+ | 4170 * | | Req- | scr | 4171 * | | Sent | | 4172 * | | | | 4173 * | +--------+ | 4174 * | RCA- | | RCA+ | 4175 * +------+ +------------------------------------------+ 4176 * scn,tld sca,irc,ict,tlu 4177 * 4178 * 4179 * with: 4180 * 4181 * Open: LCP reached authentication phase 4182 * Close: LCP reached terminate phase 4183 * 4184 * RCA+: received reply (pap-req, chap-response), acceptable 4185 * RCN: received reply (pap-req, chap-response), not acceptable 4186 * TO+: timeout with restart counter >= 0 4187 * TO-: timeout with restart counter < 0 4188 * TO*: reschedule timeout for CHAP 4189 * 4190 * scr: send request packet (none for PAP, chap-challenge) 4191 * sca: send ack packet (pap-ack, chap-success) 4192 * scn: send nak packet (pap-nak, chap-failure) 4193 * ict: initialize re-challenge timer (CHAP only) 4194 * 4195 * tlu: this-layer-up, LCP reaches network phase 4196 * tld: this-layer-down, LCP enters terminate phase 4197 * 4198 * Note that in CHAP mode, after sending a new challenge, while the state 4199 * automaton falls back into Req-Sent state, it doesn't signal a tld 4200 * event to LCP, so LCP remains in network phase. Only after not getting 4201 * any response (or after getting an unacceptable response), CHAP closes, 4202 * causing LCP to enter terminate phase. 4203 * 4204 * With PAP, there is no initial request that can be sent. The peer is 4205 * expected to send one based on the successful negotiation of PAP as 4206 * the authentication protocol during the LCP option negotiation. 4207 * 4208 * Incoming authentication protocol requests (remote requests 4209 * authentication, we are peer) don't employ a state machine at all, 4210 * they are simply answered. Some peers [Ascend P50 firmware rev 4211 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 4212 * still in authentication phase (thereby violating the standard that 4213 * demands that these NCP packets are to be discarded), so we keep 4214 * track of the peer demanding us to authenticate, and only proceed to 4215 * phase network once we've seen a positive acknowledge for the 4216 * authentication. 4217 */ 4218 4219 /* 4220 * Handle incoming CHAP packets. 4221 */ 4222 void 4223 sppp_chap_input(struct sppp *sp, struct mbuf *m) 4224 { 4225 STDDCL; 4226 struct lcp_header *h; 4227 int len, x; 4228 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 4229 int value_len, name_len; 4230 MD5_CTX ctx; 4231 4232 len = m->m_pkthdr.len; 4233 if (len < 4) { 4234 if (debug) 4235 log(LOG_DEBUG, 4236 "%s: chap invalid packet length: %d bytes\n", 4237 ifp->if_xname, len); 4238 return; 4239 } 4240 h = mtod(m, struct lcp_header *); 4241 if (len > ntohs(h->len)) 4242 len = ntohs(h->len); 4243 4244 SPPP_LOCK(sp, RW_WRITER); 4245 4246 switch (h->type) { 4247 /* challenge, failure and success are his authproto */ 4248 case CHAP_CHALLENGE: 4249 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4250 /* can't do anything useful */ 4251 sp->pp_auth_failures++; 4252 printf("%s: chap input without my name and my secret being set\n", 4253 ifp->if_xname); 4254 break; 4255 } 4256 value = 1 + (u_char *)(h + 1); 4257 value_len = value[-1]; 4258 name = value + value_len; 4259 name_len = len - value_len - 5; 4260 if (name_len < 0) { 4261 if (debug) { 4262 log(LOG_DEBUG, 4263 "%s: chap corrupted challenge " 4264 "<%s id=0x%x len=%d", 4265 ifp->if_xname, 4266 sppp_auth_type_name(PPP_CHAP, h->type), 4267 h->ident, ntohs(h->len)); 4268 if (len > 4) 4269 sppp_print_bytes((u_char *)(h + 1), 4270 len - 4); 4271 addlog(">\n"); 4272 } 4273 break; 4274 } 4275 4276 if (debug) { 4277 log(LOG_DEBUG, 4278 "%s: chap input <%s id=0x%x len=%d name=", 4279 ifp->if_xname, 4280 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 4281 ntohs(h->len)); 4282 sppp_print_string((char *) name, name_len); 4283 addlog(" value-size=%d value=", value_len); 4284 sppp_print_bytes(value, value_len); 4285 addlog(">\n"); 4286 } 4287 4288 /* Compute reply value. */ 4289 MD5Init(&ctx); 4290 MD5Update(&ctx, &h->ident, 1); 4291 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 4292 MD5Update(&ctx, value, value_len); 4293 MD5Final(digest, &ctx); 4294 dsize = sizeof digest; 4295 4296 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 4297 sizeof dsize, (const char *)&dsize, 4298 sizeof digest, digest, 4299 sp->myauth.name_len, 4300 sp->myauth.name, 4301 0); 4302 break; 4303 4304 case CHAP_SUCCESS: 4305 if (debug) { 4306 log(LOG_DEBUG, "%s: chap success", 4307 ifp->if_xname); 4308 if (len > 4) { 4309 addlog(": "); 4310 sppp_print_string((char *)(h + 1), len - 4); 4311 } 4312 addlog("\n"); 4313 } 4314 x = splnet(); 4315 sp->pp_auth_failures = 0; 4316 sp->pp_flags &= ~PP_NEEDAUTH; 4317 if (sp->myauth.proto == PPP_CHAP && 4318 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4319 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 4320 /* 4321 * We are authenticator for CHAP but didn't 4322 * complete yet. Leave it to tlu to proceed 4323 * to network phase. 4324 */ 4325 splx(x); 4326 break; 4327 } 4328 splx(x); 4329 sppp_phase_network(sp); 4330 break; 4331 4332 case CHAP_FAILURE: 4333 x = splnet(); 4334 sp->pp_auth_failures++; 4335 splx(x); 4336 if (debug) { 4337 log(LOG_INFO, "%s: chap failure", 4338 ifp->if_xname); 4339 if (len > 4) { 4340 addlog(": "); 4341 sppp_print_string((char *)(h + 1), len - 4); 4342 } 4343 addlog("\n"); 4344 } else 4345 log(LOG_INFO, "%s: chap failure\n", 4346 ifp->if_xname); 4347 /* await LCP shutdown by authenticator */ 4348 break; 4349 4350 /* response is my authproto */ 4351 case CHAP_RESPONSE: 4352 if (sp->hisauth.secret == NULL) { 4353 /* can't do anything useful */ 4354 printf("%s: chap input without his secret being set\n", 4355 ifp->if_xname); 4356 break; 4357 } 4358 value = 1 + (u_char *)(h + 1); 4359 value_len = value[-1]; 4360 name = value + value_len; 4361 name_len = len - value_len - 5; 4362 if (name_len < 0) { 4363 if (debug) { 4364 log(LOG_DEBUG, 4365 "%s: chap corrupted response " 4366 "<%s id=0x%x len=%d", 4367 ifp->if_xname, 4368 sppp_auth_type_name(PPP_CHAP, h->type), 4369 h->ident, ntohs(h->len)); 4370 if (len > 4) 4371 sppp_print_bytes((u_char *)(h + 1), 4372 len - 4); 4373 addlog(">\n"); 4374 } 4375 break; 4376 } 4377 if (h->ident != sp->confid[IDX_CHAP]) { 4378 if (debug) 4379 log(LOG_DEBUG, 4380 "%s: chap dropping response for old ID " 4381 "(got %d, expected %d)\n", 4382 ifp->if_xname, 4383 h->ident, sp->confid[IDX_CHAP]); 4384 break; 4385 } 4386 if (sp->hisauth.name != NULL && 4387 (name_len != sp->hisauth.name_len 4388 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 4389 log(LOG_INFO, "%s: chap response, his name ", 4390 ifp->if_xname); 4391 sppp_print_string(name, name_len); 4392 addlog(" != expected "); 4393 sppp_print_string(sp->hisauth.name, 4394 sp->hisauth.name_len); 4395 addlog("\n"); 4396 goto chap_failure; 4397 } 4398 if (debug) { 4399 log(LOG_DEBUG, "%s: chap input(%s) " 4400 "<%s id=0x%x len=%d name=", 4401 ifp->if_xname, 4402 sppp_state_name(sp->state[IDX_CHAP]), 4403 sppp_auth_type_name(PPP_CHAP, h->type), 4404 h->ident, ntohs(h->len)); 4405 sppp_print_string((char *)name, name_len); 4406 addlog(" value-size=%d value=", value_len); 4407 sppp_print_bytes(value, value_len); 4408 addlog(">\n"); 4409 } 4410 if (value_len != sizeof(sp->hisauth.challenge)) { 4411 if (debug) 4412 log(LOG_DEBUG, 4413 "%s: chap bad hash value length: " 4414 "%d bytes, should be %zu\n", 4415 ifp->if_xname, value_len, 4416 sizeof(sp->hisauth.challenge)); 4417 goto chap_failure; 4418 } 4419 4420 MD5Init(&ctx); 4421 MD5Update(&ctx, &h->ident, 1); 4422 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 4423 MD5Update(&ctx, sp->hisauth.challenge, sizeof(sp->hisauth.challenge)); 4424 MD5Final(digest, &ctx); 4425 4426 #define FAILMSG "Failed..." 4427 #define SUCCMSG "Welcome!" 4428 4429 if (value_len != sizeof digest || 4430 memcmp(digest, value, value_len) != 0) { 4431 chap_failure: 4432 KASSERT(SPPP_WLOCKED(sp)); 4433 /* action scn, tld */ 4434 sp->pp_auth_failures++; 4435 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 4436 sizeof(FAILMSG) - 1, (const u_char *)FAILMSG, 4437 0); 4438 chap.tld(sp); 4439 break; 4440 } 4441 sp->pp_auth_failures = 0; 4442 /* action sca, perhaps tlu */ 4443 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 4444 sp->state[IDX_CHAP] == STATE_OPENED) 4445 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 4446 sizeof(SUCCMSG) - 1, (const u_char *)SUCCMSG, 4447 0); 4448 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 4449 sppp_cp_change_state(&chap, sp, STATE_OPENED); 4450 chap.tlu(sp); 4451 } 4452 break; 4453 4454 default: 4455 /* Unknown CHAP packet type -- ignore. */ 4456 if (debug) { 4457 log(LOG_DEBUG, "%s: chap unknown input(%s) " 4458 "<0x%x id=0x%xh len=%d", 4459 ifp->if_xname, 4460 sppp_state_name(sp->state[IDX_CHAP]), 4461 h->type, h->ident, ntohs(h->len)); 4462 if (len > 4) 4463 sppp_print_bytes((u_char *)(h + 1), len - 4); 4464 addlog(">\n"); 4465 } 4466 break; 4467 4468 } 4469 4470 SPPP_UNLOCK(sp); 4471 } 4472 4473 static void 4474 sppp_chap_init(struct sppp *sp) 4475 { 4476 4477 KASSERT(SPPP_WLOCKED(sp)); 4478 4479 /* Chap doesn't have STATE_INITIAL at all. */ 4480 sp->state[IDX_CHAP] = STATE_CLOSED; 4481 sp->fail_counter[IDX_CHAP] = 0; 4482 sp->pp_seq[IDX_CHAP] = 0; 4483 sp->pp_rseq[IDX_CHAP] = 0; 4484 callout_init(&sp->ch[IDX_CHAP], CALLOUT_MPSAFE); 4485 } 4486 4487 static void 4488 sppp_chap_open(struct sppp *sp) 4489 { 4490 4491 KASSERT(SPPP_WLOCKED(sp)); 4492 if (sp->hisauth.proto == PPP_CHAP && 4493 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4494 /* we are authenticator for CHAP, start it */ 4495 chap.scr(sp); 4496 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4497 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4498 } 4499 /* nothing to be done if we are peer, await a challenge */ 4500 } 4501 4502 static void 4503 sppp_chap_close(struct sppp *sp) 4504 { 4505 4506 KASSERT(SPPP_WLOCKED(sp)); 4507 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4508 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4509 } 4510 4511 static void 4512 sppp_chap_TO(void *cookie) 4513 { 4514 struct sppp *sp = (struct sppp *)cookie; 4515 STDDCL; 4516 int s; 4517 4518 s = splnet(); 4519 4520 SPPP_LOCK(sp, RW_WRITER); 4521 4522 if (debug) 4523 log(LOG_DEBUG, "%s: chap TO(%s) rst_counter = %d\n", 4524 ifp->if_xname, 4525 sppp_state_name(sp->state[IDX_CHAP]), 4526 sp->rst_counter[IDX_CHAP]); 4527 4528 if (--sp->rst_counter[IDX_CHAP] < 0) 4529 /* TO- event */ 4530 switch (sp->state[IDX_CHAP]) { 4531 case STATE_REQ_SENT: 4532 chap.tld(sp); 4533 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4534 break; 4535 } 4536 else 4537 /* TO+ (or TO*) event */ 4538 switch (sp->state[IDX_CHAP]) { 4539 case STATE_OPENED: 4540 /* TO* event */ 4541 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4542 /* fall through */ 4543 case STATE_REQ_SENT: 4544 chap.scr(sp); 4545 /* sppp_cp_change_state() will restart the timer */ 4546 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4547 break; 4548 } 4549 4550 SPPP_UNLOCK(sp); 4551 splx(s); 4552 } 4553 4554 static void 4555 sppp_chap_tlu(struct sppp *sp) 4556 { 4557 STDDCL; 4558 int i, x; 4559 4560 KASSERT(SPPP_WLOCKED(sp)); 4561 4562 i = 0; 4563 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4564 4565 /* 4566 * Some broken CHAP implementations (Conware CoNet, firmware 4567 * 4.0.?) don't want to re-authenticate their CHAP once the 4568 * initial challenge-response exchange has taken place. 4569 * Provide for an option to avoid rechallenges. 4570 */ 4571 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4572 /* 4573 * Compute the re-challenge timeout. This will yield 4574 * a number between 300 and 810 seconds. 4575 */ 4576 i = 300 + ((unsigned)(cprng_fast32() & 0xff00) >> 7); 4577 4578 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4579 } 4580 4581 if (debug) { 4582 log(LOG_DEBUG, 4583 "%s: chap %s, ", 4584 ifp->if_xname, 4585 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4586 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4587 addlog("next re-challenge in %d seconds\n", i); 4588 else 4589 addlog("re-challenging suppressed\n"); 4590 } 4591 4592 x = splnet(); 4593 sp->pp_auth_failures = 0; 4594 /* indicate to LCP that we need to be closed down */ 4595 sp->lcp.protos |= (1 << IDX_CHAP); 4596 4597 if (sp->pp_flags & PP_NEEDAUTH) { 4598 /* 4599 * Remote is authenticator, but his auth proto didn't 4600 * complete yet. Defer the transition to network 4601 * phase. 4602 */ 4603 splx(x); 4604 return; 4605 } 4606 splx(x); 4607 4608 /* 4609 * If we are already in phase network, we are done here. This 4610 * is the case if this is a dummy tlu event after a re-challenge. 4611 */ 4612 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4613 sppp_phase_network(sp); 4614 } 4615 4616 static void 4617 sppp_chap_tld(struct sppp *sp) 4618 { 4619 STDDCL; 4620 4621 KASSERT(SPPP_WLOCKED(sp)); 4622 4623 if (debug) 4624 log(LOG_DEBUG, "%s: chap tld\n", ifp->if_xname); 4625 callout_stop(&sp->ch[IDX_CHAP]); 4626 sp->lcp.protos &= ~(1 << IDX_CHAP); 4627 4628 lcp.Close(sp); 4629 } 4630 4631 static void 4632 sppp_chap_scr(struct sppp *sp) 4633 { 4634 uint32_t *ch; 4635 u_char clen = 4 * sizeof(uint32_t); 4636 4637 KASSERT(SPPP_WLOCKED(sp)); 4638 4639 if (sp->hisauth.name == NULL) { 4640 /* can't do anything useful */ 4641 printf("%s: chap starting without his name being set\n", 4642 sp->pp_if.if_xname); 4643 return; 4644 } 4645 4646 /* Compute random challenge. */ 4647 ch = (uint32_t *)sp->hisauth.challenge; 4648 cprng_strong(kern_cprng, ch, clen, 0); 4649 4650 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4651 4652 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4653 sizeof clen, (const char *)&clen, 4654 sizeof(sp->hisauth.challenge), sp->hisauth.challenge, 4655 0); 4656 } 4657 4658 /* 4659 *--------------------------------------------------------------------------* 4660 * * 4661 * The PAP implementation. * 4662 * * 4663 *--------------------------------------------------------------------------* 4664 */ 4665 /* 4666 * For PAP, we need to keep a little state also if we are the peer, not the 4667 * authenticator. This is since we don't get a request to authenticate, but 4668 * have to repeatedly authenticate ourself until we got a response (or the 4669 * retry counter is expired). 4670 */ 4671 4672 /* 4673 * Handle incoming PAP packets. */ 4674 static void 4675 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4676 { 4677 STDDCL; 4678 struct lcp_header *h; 4679 int len, x; 4680 u_char mlen; 4681 char *name, *secret; 4682 int name_len, secret_len; 4683 4684 /* 4685 * Malicious input might leave this uninitialized, so 4686 * init to an impossible value. 4687 */ 4688 secret_len = -1; 4689 4690 len = m->m_pkthdr.len; 4691 if (len < 5) { 4692 if (debug) 4693 log(LOG_DEBUG, 4694 "%s: pap invalid packet length: %d bytes\n", 4695 ifp->if_xname, len); 4696 return; 4697 } 4698 h = mtod(m, struct lcp_header *); 4699 if (len > ntohs(h->len)) 4700 len = ntohs(h->len); 4701 4702 SPPP_LOCK(sp, RW_WRITER); 4703 4704 switch (h->type) { 4705 /* PAP request is my authproto */ 4706 case PAP_REQ: 4707 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4708 /* can't do anything useful */ 4709 printf("%s: " 4710 "pap request without his name and his secret being set\n", 4711 ifp->if_xname); 4712 break; 4713 } 4714 name = 1 + (u_char *)(h + 1); 4715 name_len = name[-1]; 4716 secret = name + name_len + 1; 4717 if (name_len > len - 6 || 4718 (secret_len = secret[-1]) > len - 6 - name_len) { 4719 if (debug) { 4720 log(LOG_DEBUG, "%s: pap corrupted input " 4721 "<%s id=0x%x len=%d", 4722 ifp->if_xname, 4723 sppp_auth_type_name(PPP_PAP, h->type), 4724 h->ident, ntohs(h->len)); 4725 if (len > 4) 4726 sppp_print_bytes((u_char *)(h + 1), 4727 len - 4); 4728 addlog(">\n"); 4729 } 4730 break; 4731 } 4732 if (debug) { 4733 log(LOG_DEBUG, "%s: pap input(%s) " 4734 "<%s id=0x%x len=%d name=", 4735 ifp->if_xname, 4736 sppp_state_name(sp->state[IDX_PAP]), 4737 sppp_auth_type_name(PPP_PAP, h->type), 4738 h->ident, ntohs(h->len)); 4739 sppp_print_string((char *)name, name_len); 4740 addlog(" secret="); 4741 sppp_print_string((char *)secret, secret_len); 4742 addlog(">\n"); 4743 } 4744 if (name_len != sp->hisauth.name_len || 4745 secret_len != sp->hisauth.secret_len || 4746 memcmp(name, sp->hisauth.name, name_len) != 0 || 4747 memcmp(secret, sp->hisauth.secret, secret_len) != 0) { 4748 /* action scn, tld */ 4749 sp->pp_auth_failures++; 4750 mlen = sizeof(FAILMSG) - 1; 4751 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4752 sizeof mlen, (const char *)&mlen, 4753 sizeof(FAILMSG) - 1, (const u_char *)FAILMSG, 4754 0); 4755 pap.tld(sp); 4756 break; 4757 } 4758 /* action sca, perhaps tlu */ 4759 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4760 sp->state[IDX_PAP] == STATE_OPENED) { 4761 mlen = sizeof(SUCCMSG) - 1; 4762 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4763 sizeof mlen, (const char *)&mlen, 4764 sizeof(SUCCMSG) - 1, (const u_char *)SUCCMSG, 4765 0); 4766 } 4767 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4768 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4769 pap.tlu(sp); 4770 } 4771 break; 4772 4773 /* ack and nak are his authproto */ 4774 case PAP_ACK: 4775 callout_stop(&sp->pap_my_to_ch); 4776 if (debug) { 4777 log(LOG_DEBUG, "%s: pap success", 4778 ifp->if_xname); 4779 name = 1 + (u_char *)(h + 1); 4780 name_len = name[-1]; 4781 if (len > 5 && name_len < len+4) { 4782 addlog(": "); 4783 sppp_print_string(name, name_len); 4784 } 4785 addlog("\n"); 4786 } 4787 x = splnet(); 4788 sp->pp_auth_failures = 0; 4789 sp->pp_flags &= ~PP_NEEDAUTH; 4790 if (sp->myauth.proto == PPP_PAP && 4791 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4792 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4793 /* 4794 * We are authenticator for PAP but didn't 4795 * complete yet. Leave it to tlu to proceed 4796 * to network phase. 4797 */ 4798 splx(x); 4799 break; 4800 } 4801 splx(x); 4802 sppp_phase_network(sp); 4803 break; 4804 4805 case PAP_NAK: 4806 callout_stop(&sp->pap_my_to_ch); 4807 sp->pp_auth_failures++; 4808 if (debug) { 4809 log(LOG_INFO, "%s: pap failure", 4810 ifp->if_xname); 4811 name = 1 + (u_char *)(h + 1); 4812 name_len = name[-1]; 4813 if (len > 5 && name_len < len+4) { 4814 addlog(": "); 4815 sppp_print_string(name, name_len); 4816 } 4817 addlog("\n"); 4818 } else 4819 log(LOG_INFO, "%s: pap failure\n", 4820 ifp->if_xname); 4821 /* await LCP shutdown by authenticator */ 4822 break; 4823 4824 default: 4825 /* Unknown PAP packet type -- ignore. */ 4826 if (debug) { 4827 log(LOG_DEBUG, "%s: pap corrupted input " 4828 "<0x%x id=0x%x len=%d", 4829 ifp->if_xname, 4830 h->type, h->ident, ntohs(h->len)); 4831 if (len > 4) 4832 sppp_print_bytes((u_char *)(h + 1), len - 4); 4833 addlog(">\n"); 4834 } 4835 break; 4836 } 4837 4838 SPPP_UNLOCK(sp); 4839 } 4840 4841 static void 4842 sppp_pap_init(struct sppp *sp) 4843 { 4844 4845 KASSERT(SPPP_WLOCKED(sp)); 4846 4847 /* PAP doesn't have STATE_INITIAL at all. */ 4848 sp->state[IDX_PAP] = STATE_CLOSED; 4849 sp->fail_counter[IDX_PAP] = 0; 4850 sp->pp_seq[IDX_PAP] = 0; 4851 sp->pp_rseq[IDX_PAP] = 0; 4852 callout_init(&sp->ch[IDX_PAP], CALLOUT_MPSAFE); 4853 callout_init(&sp->pap_my_to_ch, CALLOUT_MPSAFE); 4854 } 4855 4856 static void 4857 sppp_pap_open(struct sppp *sp) 4858 { 4859 4860 KASSERT(SPPP_WLOCKED(sp)); 4861 4862 if (sp->hisauth.proto == PPP_PAP && 4863 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4864 /* we are authenticator for PAP, start our timer */ 4865 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4866 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4867 } 4868 if (sp->myauth.proto == PPP_PAP) { 4869 /* we are peer, send a request, and start a timer */ 4870 pap.scr(sp); 4871 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4872 sppp_pap_my_TO, sp); 4873 } 4874 } 4875 4876 static void 4877 sppp_pap_close(struct sppp *sp) 4878 { 4879 4880 KASSERT(SPPP_WLOCKED(sp)); 4881 4882 if (sp->state[IDX_PAP] != STATE_CLOSED) 4883 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4884 } 4885 4886 /* 4887 * That's the timeout routine if we are authenticator. Since the 4888 * authenticator is basically passive in PAP, we can't do much here. 4889 */ 4890 static void 4891 sppp_pap_TO(void *cookie) 4892 { 4893 struct sppp *sp = (struct sppp *)cookie; 4894 STDDCL; 4895 int s; 4896 4897 s = splnet(); 4898 SPPP_LOCK(sp, RW_WRITER); 4899 4900 if (debug) 4901 log(LOG_DEBUG, "%s: pap TO(%s) rst_counter = %d\n", 4902 ifp->if_xname, 4903 sppp_state_name(sp->state[IDX_PAP]), 4904 sp->rst_counter[IDX_PAP]); 4905 4906 if (--sp->rst_counter[IDX_PAP] < 0) 4907 /* TO- event */ 4908 switch (sp->state[IDX_PAP]) { 4909 case STATE_REQ_SENT: 4910 pap.tld(sp); 4911 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4912 break; 4913 } 4914 else 4915 /* TO+ event, not very much we could do */ 4916 switch (sp->state[IDX_PAP]) { 4917 case STATE_REQ_SENT: 4918 /* sppp_cp_change_state() will restart the timer */ 4919 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4920 break; 4921 } 4922 4923 SPPP_UNLOCK(sp); 4924 splx(s); 4925 } 4926 4927 /* 4928 * That's the timeout handler if we are peer. Since the peer is active, 4929 * we need to retransmit our PAP request since it is apparently lost. 4930 * XXX We should impose a max counter. 4931 */ 4932 static void 4933 sppp_pap_my_TO(void *cookie) 4934 { 4935 struct sppp *sp = (struct sppp *)cookie; 4936 STDDCL; 4937 4938 SPPP_LOCK(sp, RW_WRITER); 4939 if (debug) 4940 log(LOG_DEBUG, "%s: pap peer TO\n", 4941 ifp->if_xname); 4942 4943 pap.scr(sp); 4944 4945 SPPP_UNLOCK(sp); 4946 } 4947 4948 static void 4949 sppp_pap_tlu(struct sppp *sp) 4950 { 4951 STDDCL; 4952 int x; 4953 4954 KASSERT(SPPP_WLOCKED(sp)); 4955 4956 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4957 4958 if (debug) 4959 log(LOG_DEBUG, "%s: %s tlu\n", 4960 ifp->if_xname, pap.name); 4961 4962 x = splnet(); 4963 sp->pp_auth_failures = 0; 4964 /* indicate to LCP that we need to be closed down */ 4965 sp->lcp.protos |= (1 << IDX_PAP); 4966 4967 if (sp->pp_flags & PP_NEEDAUTH) { 4968 /* 4969 * Remote is authenticator, but his auth proto didn't 4970 * complete yet. Defer the transition to network 4971 * phase. 4972 */ 4973 splx(x); 4974 return; 4975 } 4976 splx(x); 4977 sppp_phase_network(sp); 4978 } 4979 4980 static void 4981 sppp_pap_tld(struct sppp *sp) 4982 { 4983 STDDCL; 4984 4985 KASSERT(SPPP_WLOCKED(sp)); 4986 4987 if (debug) 4988 log(LOG_DEBUG, "%s: pap tld\n", ifp->if_xname); 4989 callout_stop(&sp->ch[IDX_PAP]); 4990 callout_stop(&sp->pap_my_to_ch); 4991 sp->lcp.protos &= ~(1 << IDX_PAP); 4992 4993 lcp.Close(sp); 4994 } 4995 4996 static void 4997 sppp_pap_scr(struct sppp *sp) 4998 { 4999 u_char idlen, pwdlen; 5000 5001 KASSERT(SPPP_WLOCKED(sp)); 5002 5003 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 5004 /* can't do anything useful */ 5005 printf("%s: pap starting without my name and secret being set\n", 5006 sp->pp_if.if_xname); 5007 return; 5008 } 5009 5010 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 5011 pwdlen = sp->myauth.secret_len; 5012 idlen = sp->myauth.name_len; 5013 5014 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 5015 sizeof idlen, (const char *)&idlen, 5016 idlen, sp->myauth.name, 5017 sizeof pwdlen, (const char *)&pwdlen, 5018 pwdlen, sp->myauth.secret, 5019 0); 5020 } 5021 5022 /* 5023 * Random miscellaneous functions. 5024 */ 5025 5026 /* 5027 * Send a PAP or CHAP proto packet. 5028 * 5029 * Varadic function, each of the elements for the ellipsis is of type 5030 * ``size_t mlen, const u_char *msg''. Processing will stop iff 5031 * mlen == 0. 5032 * NOTE: never declare variadic functions with types subject to type 5033 * promotion (i.e. u_char). This is asking for big trouble depending 5034 * on the architecture you are on... 5035 */ 5036 5037 static void 5038 sppp_auth_send(const struct cp *cp, struct sppp *sp, 5039 unsigned int type, unsigned int id, 5040 ...) 5041 { 5042 STDDCL; 5043 struct lcp_header *lh; 5044 struct mbuf *m; 5045 u_char *p; 5046 int len; 5047 size_t pkthdrlen; 5048 unsigned int mlen; 5049 const char *msg; 5050 va_list ap; 5051 5052 KASSERT(SPPP_WLOCKED(sp)); 5053 5054 MGETHDR(m, M_DONTWAIT, MT_DATA); 5055 if (! m) 5056 return; 5057 m_reset_rcvif(m); 5058 5059 if (sp->pp_flags & PP_NOFRAMING) { 5060 *mtod(m, uint16_t *) = htons(cp->proto); 5061 pkthdrlen = 2; 5062 lh = (struct lcp_header *)(mtod(m, uint8_t *)+2); 5063 } else { 5064 struct ppp_header *h; 5065 h = mtod(m, struct ppp_header *); 5066 h->address = PPP_ALLSTATIONS; /* broadcast address */ 5067 h->control = PPP_UI; /* Unnumbered Info */ 5068 h->protocol = htons(cp->proto); 5069 pkthdrlen = PPP_HEADER_LEN; 5070 5071 lh = (struct lcp_header *)(h + 1); 5072 } 5073 5074 lh->type = type; 5075 lh->ident = id; 5076 p = (u_char *)(lh + 1); 5077 5078 va_start(ap, id); 5079 len = 0; 5080 5081 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 5082 msg = va_arg(ap, const char *); 5083 len += mlen; 5084 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 5085 va_end(ap); 5086 m_freem(m); 5087 return; 5088 } 5089 5090 memcpy(p, msg, mlen); 5091 p += mlen; 5092 } 5093 va_end(ap); 5094 5095 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 5096 lh->len = htons(LCP_HEADER_LEN + len); 5097 5098 if (debug) { 5099 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 5100 ifp->if_xname, cp->name, 5101 sppp_auth_type_name(cp->proto, lh->type), 5102 lh->ident, ntohs(lh->len)); 5103 if (len) 5104 sppp_print_bytes((u_char *)(lh + 1), len); 5105 addlog(">\n"); 5106 } 5107 if (IF_QFULL(&sp->pp_cpq)) { 5108 IF_DROP(&sp->pp_fastq); 5109 IF_DROP(&ifp->if_snd); 5110 m_freem(m); 5111 if_statinc(ifp, if_oerrors); 5112 return; 5113 } 5114 5115 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 5116 IF_ENQUEUE(&sp->pp_cpq, m); 5117 5118 if (! (ifp->if_flags & IFF_OACTIVE)) { 5119 SPPP_UNLOCK(sp); 5120 if_start_lock(ifp); 5121 SPPP_LOCK(sp, RW_WRITER); 5122 } 5123 } 5124 5125 /* 5126 * Send keepalive packets, every 10 seconds. 5127 */ 5128 static void 5129 sppp_keepalive(void *dummy) 5130 { 5131 struct sppp *sp; 5132 int s; 5133 time_t now; 5134 5135 SPPPQ_LOCK(); 5136 5137 s = splnet(); 5138 now = time_uptime; 5139 for (sp=spppq; sp; sp=sp->pp_next) { 5140 struct ifnet *ifp = NULL; 5141 5142 SPPP_LOCK(sp, RW_WRITER); 5143 ifp = &sp->pp_if; 5144 5145 /* check idle timeout */ 5146 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 5147 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 5148 /* idle timeout is enabled for this interface */ 5149 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 5150 if (ifp->if_flags & IFF_DEBUG) 5151 printf("%s: no activity for %lu seconds\n", 5152 sp->pp_if.if_xname, 5153 (unsigned long)(now-sp->pp_last_activity)); 5154 lcp.Close(sp); 5155 SPPP_UNLOCK(sp); 5156 continue; 5157 } 5158 } 5159 5160 /* Keepalive mode disabled or channel down? */ 5161 if (! (sp->pp_flags & PP_KEEPALIVE) || 5162 ! (ifp->if_flags & IFF_RUNNING)) { 5163 SPPP_UNLOCK(sp); 5164 continue; 5165 } 5166 5167 5168 /* No keepalive in PPP mode if LCP not opened yet. */ 5169 if (! (sp->pp_flags & PP_CISCO) && 5170 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 5171 SPPP_UNLOCK(sp); 5172 continue; 5173 } 5174 5175 /* No echo reply, but maybe user data passed through? */ 5176 if ((now - sp->pp_last_receive) < sp->pp_max_noreceive) { 5177 sp->pp_alivecnt = 0; 5178 SPPP_UNLOCK(sp); 5179 continue; 5180 } 5181 5182 if (sp->pp_alivecnt >= sp->pp_maxalive) { 5183 /* No keepalive packets got. Stop the interface. */ 5184 SPPP_UNLOCK(sp); 5185 if_down (ifp); 5186 SPPP_LOCK(sp, RW_WRITER); 5187 5188 IF_PURGE(&sp->pp_cpq); 5189 5190 if (! (sp->pp_flags & PP_CISCO)) { 5191 printf("%s: LCP keepalive timed out, going to restart the connection\n", 5192 ifp->if_xname); 5193 sp->pp_alivecnt = 0; 5194 5195 /* we are down, close all open protocols */ 5196 lcp.Close(sp); 5197 5198 /* And now prepare LCP to reestablish the link, if configured to do so. */ 5199 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 5200 5201 /* Close connection immediately, completition of this 5202 * will summon the magic needed to reestablish it. */ 5203 sppp_notify_tlf_wlocked(sp); 5204 5205 SPPP_UNLOCK(sp); 5206 continue; 5207 } 5208 } 5209 if (sp->pp_alivecnt < sp->pp_maxalive) 5210 ++sp->pp_alivecnt; 5211 if (sp->pp_flags & PP_CISCO) 5212 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, 5213 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 5214 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 5215 int32_t nmagic = htonl(sp->lcp.magic); 5216 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 5217 sppp_cp_send(sp, PPP_LCP, ECHO_REQ, 5218 sp->lcp.echoid, 4, &nmagic); 5219 } 5220 5221 SPPP_UNLOCK(sp); 5222 } 5223 splx(s); 5224 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 5225 5226 SPPPQ_UNLOCK(); 5227 } 5228 5229 #ifdef INET 5230 /* 5231 * Get both IP addresses. 5232 */ 5233 static void 5234 sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, uint32_t *srcmask) 5235 { 5236 struct ifnet *ifp = &sp->pp_if; 5237 struct ifaddr *ifa; 5238 struct sockaddr_in *si, *sm; 5239 uint32_t ssrc, ddst; 5240 int s; 5241 struct psref psref; 5242 5243 sm = NULL; 5244 ssrc = ddst = 0; 5245 /* 5246 * Pick the first AF_INET address from the list, 5247 * aliases don't make any sense on a p2p link anyway. 5248 */ 5249 si = 0; 5250 s = pserialize_read_enter(); 5251 IFADDR_READER_FOREACH(ifa, ifp) { 5252 if (ifa->ifa_addr->sa_family == AF_INET) { 5253 si = (struct sockaddr_in *)ifa->ifa_addr; 5254 sm = (struct sockaddr_in *)ifa->ifa_netmask; 5255 if (si) { 5256 ifa_acquire(ifa, &psref); 5257 break; 5258 } 5259 } 5260 } 5261 pserialize_read_exit(s); 5262 if (ifa) { 5263 if (si && si->sin_addr.s_addr) { 5264 ssrc = si->sin_addr.s_addr; 5265 if (srcmask) 5266 *srcmask = ntohl(sm->sin_addr.s_addr); 5267 } 5268 5269 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 5270 if (si && si->sin_addr.s_addr) 5271 ddst = si->sin_addr.s_addr; 5272 ifa_release(ifa, &psref); 5273 } 5274 5275 if (dst) *dst = ntohl(ddst); 5276 if (src) *src = ntohl(ssrc); 5277 } 5278 5279 /* 5280 * Set IP addresses. Must be called at splnet. 5281 * If an address is 0, leave it the way it is. 5282 */ 5283 static void 5284 sppp_set_ip_addrs_work(struct work *wk, struct sppp *sp) 5285 { 5286 STDDCL; 5287 struct ifaddr *ifa; 5288 struct sockaddr_in *si, *dest; 5289 uint32_t myaddr = 0, hisaddr = 0; 5290 int s; 5291 5292 IFNET_LOCK(ifp); 5293 5294 /* 5295 * Pick the first AF_INET address from the list, 5296 * aliases don't make any sense on a p2p link anyway. 5297 */ 5298 si = dest = NULL; 5299 s = pserialize_read_enter(); 5300 IFADDR_READER_FOREACH(ifa, ifp) { 5301 if (ifa->ifa_addr->sa_family == AF_INET) { 5302 si = (struct sockaddr_in *)ifa->ifa_addr; 5303 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5304 break; 5305 } 5306 } 5307 pserialize_read_exit(s); 5308 5309 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 5310 myaddr = sp->ipcp.req_myaddr; 5311 else if (si != NULL) 5312 myaddr = ntohl(si->sin_addr.s_addr); 5313 5314 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 5315 hisaddr = sp->ipcp.req_hisaddr; 5316 else if (dest != NULL) 5317 hisaddr = ntohl(dest->sin_addr.s_addr); 5318 5319 if (si != NULL && dest != NULL) { 5320 int error; 5321 struct sockaddr_in new_sin = *si; 5322 struct sockaddr_in new_dst = *dest; 5323 5324 if (myaddr != 0) 5325 new_sin.sin_addr.s_addr = htonl(myaddr); 5326 if (hisaddr != 0) { 5327 new_dst.sin_addr.s_addr = htonl(hisaddr); 5328 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) 5329 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 5330 } 5331 5332 in_addrhash_remove(ifatoia(ifa)); 5333 5334 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5335 5336 in_addrhash_insert(ifatoia(ifa)); 5337 5338 if (debug && error) 5339 { 5340 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5341 ifp->if_xname, __func__, error); 5342 } 5343 if (!error) { 5344 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5345 } 5346 } 5347 5348 if (ifp->if_mtu > sp->lcp.their_mru) { 5349 sp->pp_saved_mtu = ifp->if_mtu; 5350 ifp->if_mtu = sp->lcp.their_mru; 5351 if (debug) 5352 log(LOG_DEBUG, 5353 "%s: setting MTU to %" PRIu64 " bytes\n", 5354 ifp->if_xname, ifp->if_mtu); 5355 } 5356 5357 IFNET_UNLOCK(ifp); 5358 5359 sppp_notify_con(sp); 5360 } 5361 5362 static void 5363 sppp_set_ip_addrs(struct sppp *sp) 5364 { 5365 struct ifnet *ifp = &sp->pp_if; 5366 5367 if (!pcq_put(sp->ipcp.update_addrs_q, (void *)IPCP_SET_ADDRS)) { 5368 log(LOG_WARNING, "%s: cannot enqueued, ignore sppp_clear_ip_addrs\n", 5369 ifp->if_xname); 5370 return; 5371 } 5372 5373 if (atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1) == 1) 5374 return; 5375 5376 workqueue_enqueue(sp->ipcp.update_addrs_wq, &sp->ipcp.update_addrs_wk, NULL); 5377 } 5378 5379 /* 5380 * Clear IP addresses. Must be called at splnet. 5381 */ 5382 static void 5383 sppp_clear_ip_addrs_work(struct work *wk, struct sppp *sp) 5384 { 5385 STDDCL; 5386 struct ifaddr *ifa; 5387 struct sockaddr_in *si, *dest; 5388 int s; 5389 5390 IFNET_LOCK(ifp); 5391 5392 /* 5393 * Pick the first AF_INET address from the list, 5394 * aliases don't make any sense on a p2p link anyway. 5395 */ 5396 si = dest = NULL; 5397 s = pserialize_read_enter(); 5398 IFADDR_READER_FOREACH(ifa, ifp) { 5399 if (ifa->ifa_addr->sa_family == AF_INET) { 5400 si = (struct sockaddr_in *)ifa->ifa_addr; 5401 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5402 break; 5403 } 5404 } 5405 pserialize_read_exit(s); 5406 5407 if (si != NULL) { 5408 struct sockaddr_in new_sin = *si; 5409 struct sockaddr_in new_dst = *dest; 5410 int error; 5411 5412 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 5413 new_sin.sin_addr.s_addr = 0; 5414 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 5415 new_dst.sin_addr.s_addr = sp->ipcp.saved_hisaddr; 5416 5417 in_addrhash_remove(ifatoia(ifa)); 5418 5419 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5420 5421 in_addrhash_insert(ifatoia(ifa)); 5422 5423 if (debug && error) 5424 { 5425 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5426 ifp->if_xname, __func__, error); 5427 } 5428 if (!error) { 5429 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5430 } 5431 } 5432 5433 if (sp->pp_saved_mtu > 0) { 5434 ifp->if_mtu = sp->pp_saved_mtu; 5435 sp->pp_saved_mtu = 0; 5436 if (debug) 5437 log(LOG_DEBUG, 5438 "%s: resetting MTU to %" PRIu64 " bytes\n", 5439 ifp->if_xname, ifp->if_mtu); 5440 } 5441 5442 IFNET_UNLOCK(ifp); 5443 } 5444 5445 static void 5446 sppp_clear_ip_addrs(struct sppp *sp) 5447 { 5448 struct ifnet *ifp = &sp->pp_if; 5449 5450 if (!pcq_put(sp->ipcp.update_addrs_q, (void *)IPCP_CLEAR_ADDRS)) { 5451 log(LOG_WARNING, "%s: cannot enqueued, ignore sppp_clear_ip_addrs\n", 5452 ifp->if_xname); 5453 return; 5454 } 5455 5456 if (atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1) == 1) 5457 return; 5458 5459 workqueue_enqueue(sp->ipcp.update_addrs_wq, &sp->ipcp.update_addrs_wk, NULL); 5460 } 5461 5462 static void 5463 sppp_update_ip_addrs_work(struct work *wk, void *arg) 5464 { 5465 struct sppp *sp = arg; 5466 void *work; 5467 5468 atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 0); 5469 5470 while ((work = pcq_get(sp->ipcp.update_addrs_q)) != NULL) { 5471 int update = (intptr_t)work; 5472 5473 if (update == IPCP_SET_ADDRS) 5474 sppp_set_ip_addrs_work(wk, sp); 5475 else if (update == IPCP_CLEAR_ADDRS) 5476 sppp_clear_ip_addrs_work(wk, sp); 5477 } 5478 } 5479 #endif 5480 5481 #ifdef INET6 5482 /* 5483 * Get both IPv6 addresses. 5484 */ 5485 static void 5486 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 5487 struct in6_addr *srcmask) 5488 { 5489 struct ifnet *ifp = &sp->pp_if; 5490 struct ifaddr *ifa; 5491 struct sockaddr_in6 *si, *sm; 5492 struct in6_addr ssrc, ddst; 5493 int s; 5494 struct psref psref; 5495 5496 sm = NULL; 5497 memset(&ssrc, 0, sizeof(ssrc)); 5498 memset(&ddst, 0, sizeof(ddst)); 5499 /* 5500 * Pick the first link-local AF_INET6 address from the list, 5501 * aliases don't make any sense on a p2p link anyway. 5502 */ 5503 si = 0; 5504 s = pserialize_read_enter(); 5505 IFADDR_READER_FOREACH(ifa, ifp) { 5506 if (ifa->ifa_addr->sa_family == AF_INET6) { 5507 si = (struct sockaddr_in6 *)ifa->ifa_addr; 5508 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 5509 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) { 5510 ifa_acquire(ifa, &psref); 5511 break; 5512 } 5513 } 5514 } 5515 pserialize_read_exit(s); 5516 5517 if (ifa) { 5518 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 5519 memcpy(&ssrc, &si->sin6_addr, sizeof(ssrc)); 5520 if (srcmask) { 5521 memcpy(srcmask, &sm->sin6_addr, 5522 sizeof(*srcmask)); 5523 } 5524 } 5525 5526 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 5527 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 5528 memcpy(&ddst, &si->sin6_addr, sizeof(ddst)); 5529 ifa_release(ifa, &psref); 5530 } 5531 5532 if (dst) 5533 memcpy(dst, &ddst, sizeof(*dst)); 5534 if (src) 5535 memcpy(src, &ssrc, sizeof(*src)); 5536 } 5537 5538 #ifdef IPV6CP_MYIFID_DYN 5539 /* 5540 * Generate random ifid. 5541 */ 5542 static void 5543 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 5544 { 5545 /* TBD */ 5546 } 5547 5548 /* 5549 * Set my IPv6 address. Must be called at splnet. 5550 */ 5551 static void 5552 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 5553 { 5554 STDDCL; 5555 struct ifaddr *ifa; 5556 struct sockaddr_in6 *sin6; 5557 int s; 5558 struct psref psref; 5559 5560 IFNET_LOCK(ifp); 5561 5562 /* 5563 * Pick the first link-local AF_INET6 address from the list, 5564 * aliases don't make any sense on a p2p link anyway. 5565 */ 5566 5567 sin6 = NULL; 5568 s = pserialize_read_enter(); 5569 IFADDR_READER_FOREACH(ifa, ifp) 5570 { 5571 if (ifa->ifa_addr->sa_family == AF_INET6) 5572 { 5573 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 5574 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 5575 ifa_acquire(ifa, &psref); 5576 break; 5577 } 5578 } 5579 } 5580 pserialize_read_exit(s); 5581 5582 if (ifa && sin6) 5583 { 5584 int error; 5585 struct sockaddr_in6 new_sin6 = *sin6; 5586 5587 memcpy(&new_sin6.sin6_addr, src, sizeof(new_sin6.sin6_addr)); 5588 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 5589 if (debug && error) 5590 { 5591 log(LOG_DEBUG, "%s: %s: in6_ifinit failed, error=%d\n", 5592 ifp->if_xname, __func__, error); 5593 } 5594 if (!error) { 5595 pfil_run_addrhooks(if_pfil, SIOCAIFADDR_IN6, ifa); 5596 } 5597 ifa_release(ifa, &psref); 5598 } 5599 5600 IFNET_UNLOCK(ifp); 5601 } 5602 #endif 5603 5604 /* 5605 * Suggest a candidate address to be used by peer. 5606 */ 5607 static void 5608 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 5609 { 5610 struct in6_addr myaddr; 5611 struct timeval tv; 5612 5613 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 5614 5615 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 5616 microtime(&tv); 5617 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 5618 myaddr.s6_addr[14] ^= 0xff; 5619 myaddr.s6_addr[15] ^= 0xff; 5620 } else { 5621 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 5622 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 5623 } 5624 if (suggest) 5625 memcpy(suggest, &myaddr, sizeof(myaddr)); 5626 } 5627 #endif /*INET6*/ 5628 5629 /* 5630 * Process ioctl requests specific to the PPP interface. 5631 * Permissions have already been checked. 5632 */ 5633 static int 5634 sppp_params(struct sppp *sp, u_long cmd, void *data) 5635 { 5636 switch (cmd) { 5637 case SPPPGETAUTHCFG: 5638 { 5639 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5640 int error; 5641 size_t len; 5642 5643 SPPP_LOCK(sp, RW_READER); 5644 5645 cfg->myauthflags = sp->myauth.flags; 5646 cfg->hisauthflags = sp->hisauth.flags; 5647 strlcpy(cfg->ifname, sp->pp_if.if_xname, sizeof(cfg->ifname)); 5648 cfg->hisauth = 0; 5649 if (sp->hisauth.proto) 5650 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5651 cfg->myauth = 0; 5652 if (sp->myauth.proto) 5653 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5654 if (cfg->myname_length == 0) { 5655 if (sp->myauth.name != NULL) 5656 cfg->myname_length = sp->myauth.name_len + 1; 5657 } else { 5658 if (sp->myauth.name == NULL) { 5659 cfg->myname_length = 0; 5660 } else { 5661 len = sp->myauth.name_len + 1; 5662 5663 5664 if (cfg->myname_length < len) { 5665 SPPP_UNLOCK(sp); 5666 return (ENAMETOOLONG); 5667 } 5668 error = copyout(sp->myauth.name, cfg->myname, len); 5669 if (error) { 5670 SPPP_UNLOCK(sp); 5671 return error; 5672 } 5673 } 5674 } 5675 if (cfg->hisname_length == 0) { 5676 if (sp->hisauth.name != NULL) 5677 cfg->hisname_length = sp->hisauth.name_len + 1; 5678 } else { 5679 if (sp->hisauth.name == NULL) { 5680 cfg->hisname_length = 0; 5681 } else { 5682 len = sp->hisauth.name_len + 1; 5683 5684 if (cfg->hisname_length < len) { 5685 SPPP_UNLOCK(sp); 5686 return (ENAMETOOLONG); 5687 } 5688 error = copyout(sp->hisauth.name, cfg->hisname, len); 5689 if (error) { 5690 SPPP_UNLOCK(sp); 5691 return error; 5692 } 5693 } 5694 } 5695 SPPP_UNLOCK(sp); 5696 } 5697 break; 5698 case SPPPSETAUTHCFG: 5699 { 5700 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5701 int error; 5702 5703 SPPP_LOCK(sp, RW_WRITER); 5704 5705 if (sp->myauth.name) { 5706 free(sp->myauth.name, M_DEVBUF); 5707 sp->myauth.name = NULL; 5708 } 5709 if (sp->myauth.secret) { 5710 free(sp->myauth.secret, M_DEVBUF); 5711 sp->myauth.secret = NULL; 5712 } 5713 if (sp->hisauth.name) { 5714 free(sp->hisauth.name, M_DEVBUF); 5715 sp->hisauth.name = NULL; 5716 } 5717 if (sp->hisauth.secret) { 5718 free(sp->hisauth.secret, M_DEVBUF); 5719 sp->hisauth.secret = NULL; 5720 } 5721 5722 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5723 if (cfg->hisname_length >= MCLBYTES) { 5724 SPPP_UNLOCK(sp); 5725 return (ENAMETOOLONG); 5726 } 5727 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5728 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5729 if (error) { 5730 free(sp->hisauth.name, M_DEVBUF); 5731 sp->hisauth.name = NULL; 5732 SPPP_UNLOCK(sp); 5733 return error; 5734 } 5735 sp->hisauth.name_len = cfg->hisname_length - 1; 5736 sp->hisauth.name[sp->hisauth.name_len] = 0; 5737 } 5738 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5739 if (cfg->hissecret_length >= MCLBYTES) { 5740 SPPP_UNLOCK(sp); 5741 return (ENAMETOOLONG); 5742 } 5743 sp->hisauth.secret = malloc(cfg->hissecret_length, 5744 M_DEVBUF, M_WAITOK); 5745 error = copyin(cfg->hissecret, sp->hisauth.secret, 5746 cfg->hissecret_length); 5747 if (error) { 5748 free(sp->hisauth.secret, M_DEVBUF); 5749 sp->hisauth.secret = NULL; 5750 SPPP_UNLOCK(sp); 5751 return error; 5752 } 5753 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5754 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5755 } 5756 if (cfg->myname != NULL && cfg->myname_length > 0) { 5757 if (cfg->myname_length >= MCLBYTES) { 5758 SPPP_UNLOCK(sp); 5759 return (ENAMETOOLONG); 5760 } 5761 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5762 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5763 if (error) { 5764 free(sp->myauth.name, M_DEVBUF); 5765 sp->myauth.name = NULL; 5766 SPPP_UNLOCK(sp); 5767 return error; 5768 } 5769 sp->myauth.name_len = cfg->myname_length - 1; 5770 sp->myauth.name[sp->myauth.name_len] = 0; 5771 } 5772 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5773 if (cfg->mysecret_length >= MCLBYTES) { 5774 SPPP_UNLOCK(sp); 5775 return (ENAMETOOLONG); 5776 } 5777 sp->myauth.secret = malloc(cfg->mysecret_length, 5778 M_DEVBUF, M_WAITOK); 5779 error = copyin(cfg->mysecret, sp->myauth.secret, 5780 cfg->mysecret_length); 5781 if (error) { 5782 free(sp->myauth.secret, M_DEVBUF); 5783 sp->myauth.secret = NULL; 5784 SPPP_UNLOCK(sp); 5785 return error; 5786 } 5787 sp->myauth.secret_len = cfg->mysecret_length - 1; 5788 sp->myauth.secret[sp->myauth.secret_len] = 0; 5789 } 5790 sp->myauth.flags = cfg->myauthflags; 5791 if (cfg->myauth) 5792 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5793 sp->hisauth.flags = cfg->hisauthflags; 5794 if (cfg->hisauth) 5795 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5796 sp->pp_auth_failures = 0; 5797 if (sp->hisauth.proto != 0) 5798 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 5799 else 5800 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 5801 5802 SPPP_UNLOCK(sp); 5803 } 5804 break; 5805 case SPPPGETLCPCFG: 5806 { 5807 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5808 5809 SPPP_LOCK(sp, RW_READER); 5810 lcpp->lcp_timeout = sp->lcp.timeout; 5811 SPPP_UNLOCK(sp); 5812 } 5813 break; 5814 case SPPPSETLCPCFG: 5815 { 5816 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5817 5818 SPPP_LOCK(sp, RW_WRITER); 5819 sp->lcp.timeout = lcpp->lcp_timeout; 5820 SPPP_UNLOCK(sp); 5821 } 5822 break; 5823 case SPPPGETSTATUS: 5824 { 5825 struct spppstatus *status = (struct spppstatus *)data; 5826 5827 SPPP_LOCK(sp, RW_READER); 5828 status->phase = sp->pp_phase; 5829 SPPP_UNLOCK(sp); 5830 } 5831 break; 5832 case SPPPGETSTATUSNCP: 5833 { 5834 struct spppstatusncp *status = (struct spppstatusncp *)data; 5835 5836 SPPP_LOCK(sp, RW_READER); 5837 status->phase = sp->pp_phase; 5838 status->ncpup = sppp_ncp_check(sp); 5839 SPPP_UNLOCK(sp); 5840 } 5841 break; 5842 case SPPPGETIDLETO: 5843 { 5844 struct spppidletimeout *to = (struct spppidletimeout *)data; 5845 5846 SPPP_LOCK(sp, RW_READER); 5847 to->idle_seconds = sp->pp_idle_timeout; 5848 SPPP_UNLOCK(sp); 5849 } 5850 break; 5851 case SPPPSETIDLETO: 5852 { 5853 struct spppidletimeout *to = (struct spppidletimeout *)data; 5854 5855 SPPP_LOCK(sp, RW_WRITER); 5856 sp->pp_idle_timeout = to->idle_seconds; 5857 SPPP_UNLOCK(sp); 5858 } 5859 break; 5860 case SPPPSETAUTHFAILURE: 5861 { 5862 struct spppauthfailuresettings *afsettings = 5863 (struct spppauthfailuresettings *)data; 5864 5865 SPPP_LOCK(sp, RW_WRITER); 5866 sp->pp_max_auth_fail = afsettings->max_failures; 5867 sp->pp_auth_failures = 0; 5868 SPPP_UNLOCK(sp); 5869 } 5870 break; 5871 case SPPPGETAUTHFAILURES: 5872 { 5873 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5874 5875 SPPP_LOCK(sp, RW_READER); 5876 stats->auth_failures = sp->pp_auth_failures; 5877 stats->max_failures = sp->pp_max_auth_fail; 5878 SPPP_UNLOCK(sp); 5879 } 5880 break; 5881 case SPPPSETDNSOPTS: 5882 { 5883 struct spppdnssettings *req = (struct spppdnssettings *)data; 5884 5885 SPPP_LOCK(sp, RW_WRITER); 5886 sp->query_dns = req->query_dns & 3; 5887 SPPP_UNLOCK(sp); 5888 } 5889 break; 5890 case SPPPGETDNSOPTS: 5891 { 5892 struct spppdnssettings *req = (struct spppdnssettings *)data; 5893 5894 SPPP_LOCK(sp, RW_READER); 5895 req->query_dns = sp->query_dns; 5896 SPPP_UNLOCK(sp); 5897 } 5898 break; 5899 case SPPPGETDNSADDRS: 5900 { 5901 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; 5902 5903 SPPP_LOCK(sp, RW_READER); 5904 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5905 SPPP_UNLOCK(sp); 5906 } 5907 break; 5908 case SPPPGETKEEPALIVE: 5909 { 5910 struct spppkeepalivesettings *settings = 5911 (struct spppkeepalivesettings*)data; 5912 5913 SPPP_LOCK(sp, RW_READER); 5914 settings->maxalive = sp->pp_maxalive; 5915 settings->max_noreceive = sp->pp_max_noreceive; 5916 SPPP_UNLOCK(sp); 5917 } 5918 break; 5919 case SPPPSETKEEPALIVE: 5920 { 5921 struct spppkeepalivesettings *settings = 5922 (struct spppkeepalivesettings*)data; 5923 5924 SPPP_LOCK(sp, RW_WRITER); 5925 sp->pp_maxalive = settings->maxalive; 5926 sp->pp_max_noreceive = settings->max_noreceive; 5927 SPPP_UNLOCK(sp); 5928 } 5929 break; 5930 default: 5931 { 5932 int ret; 5933 5934 MODULE_HOOK_CALL(sppp_params_50_hook, (sp, cmd, data), 5935 enosys(), ret); 5936 if (ret != ENOSYS) 5937 return ret; 5938 return (EINVAL); 5939 } 5940 } 5941 return (0); 5942 } 5943 5944 static void 5945 sppp_phase_network(struct sppp *sp) 5946 { 5947 int i; 5948 uint32_t mask; 5949 5950 KASSERT(SPPP_WLOCKED(sp)); 5951 5952 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 5953 5954 /* Notify NCPs now. */ 5955 for (i = 0; i < IDX_COUNT; i++) 5956 if ((cps[i])->flags & CP_NCP) 5957 (cps[i])->Open(sp); 5958 5959 /* Send Up events to all NCPs. */ 5960 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5961 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) { 5962 (cps[i])->Up(sp); 5963 } 5964 5965 /* if no NCP is starting, all this was in vain, close down */ 5966 sppp_lcp_check_and_close(sp); 5967 } 5968 5969 5970 static const char * 5971 sppp_cp_type_name(u_char type) 5972 { 5973 static char buf[12]; 5974 switch (type) { 5975 case CONF_REQ: return "conf-req"; 5976 case CONF_ACK: return "conf-ack"; 5977 case CONF_NAK: return "conf-nak"; 5978 case CONF_REJ: return "conf-rej"; 5979 case TERM_REQ: return "term-req"; 5980 case TERM_ACK: return "term-ack"; 5981 case CODE_REJ: return "code-rej"; 5982 case PROTO_REJ: return "proto-rej"; 5983 case ECHO_REQ: return "echo-req"; 5984 case ECHO_REPLY: return "echo-reply"; 5985 case DISC_REQ: return "discard-req"; 5986 } 5987 snprintf(buf, sizeof(buf), "0x%x", type); 5988 return buf; 5989 } 5990 5991 static const char * 5992 sppp_auth_type_name(u_short proto, u_char type) 5993 { 5994 static char buf[32]; 5995 const char *name; 5996 5997 switch (proto) { 5998 case PPP_CHAP: 5999 switch (type) { 6000 case CHAP_CHALLENGE: return "challenge"; 6001 case CHAP_RESPONSE: return "response"; 6002 case CHAP_SUCCESS: return "success"; 6003 case CHAP_FAILURE: return "failure"; 6004 default: name = "chap"; break; 6005 } 6006 break; 6007 6008 case PPP_PAP: 6009 switch (type) { 6010 case PAP_REQ: return "req"; 6011 case PAP_ACK: return "ack"; 6012 case PAP_NAK: return "nak"; 6013 default: name = "pap"; break; 6014 } 6015 break; 6016 6017 default: 6018 name = "bad"; 6019 break; 6020 } 6021 6022 snprintf(buf, sizeof(buf), "%s(%#x) %#x", name, proto, type); 6023 return buf; 6024 } 6025 6026 static const char * 6027 sppp_lcp_opt_name(u_char opt) 6028 { 6029 static char buf[12]; 6030 switch (opt) { 6031 case LCP_OPT_MRU: return "mru"; 6032 case LCP_OPT_ASYNC_MAP: return "async-map"; 6033 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 6034 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 6035 case LCP_OPT_MAGIC: return "magic"; 6036 case LCP_OPT_PROTO_COMP: return "proto-comp"; 6037 case LCP_OPT_ADDR_COMP: return "addr-comp"; 6038 case LCP_OPT_SELF_DESC_PAD: return "sdpad"; 6039 case LCP_OPT_CALL_BACK: return "callback"; 6040 case LCP_OPT_COMPOUND_FRMS: return "cmpd-frms"; 6041 case LCP_OPT_MP_MRRU: return "mrru"; 6042 case LCP_OPT_MP_SSNHF: return "mp-ssnhf"; 6043 case LCP_OPT_MP_EID: return "mp-eid"; 6044 } 6045 snprintf(buf, sizeof(buf), "0x%x", opt); 6046 return buf; 6047 } 6048 6049 static const char * 6050 sppp_ipcp_opt_name(u_char opt) 6051 { 6052 static char buf[12]; 6053 switch (opt) { 6054 case IPCP_OPT_ADDRESSES: return "addresses"; 6055 case IPCP_OPT_COMPRESSION: return "compression"; 6056 case IPCP_OPT_ADDRESS: return "address"; 6057 } 6058 snprintf(buf, sizeof(buf), "0x%x", opt); 6059 return buf; 6060 } 6061 6062 #ifdef INET6 6063 static const char * 6064 sppp_ipv6cp_opt_name(u_char opt) 6065 { 6066 static char buf[12]; 6067 switch (opt) { 6068 case IPV6CP_OPT_IFID: return "ifid"; 6069 case IPV6CP_OPT_COMPRESSION: return "compression"; 6070 } 6071 snprintf(buf, sizeof(buf), "0x%x", opt); 6072 return buf; 6073 } 6074 #endif 6075 6076 static const char * 6077 sppp_state_name(int state) 6078 { 6079 switch (state) { 6080 case STATE_INITIAL: return "initial"; 6081 case STATE_STARTING: return "starting"; 6082 case STATE_CLOSED: return "closed"; 6083 case STATE_STOPPED: return "stopped"; 6084 case STATE_CLOSING: return "closing"; 6085 case STATE_STOPPING: return "stopping"; 6086 case STATE_REQ_SENT: return "req-sent"; 6087 case STATE_ACK_RCVD: return "ack-rcvd"; 6088 case STATE_ACK_SENT: return "ack-sent"; 6089 case STATE_OPENED: return "opened"; 6090 } 6091 return "illegal"; 6092 } 6093 6094 static const char * 6095 sppp_phase_name(int phase) 6096 { 6097 switch (phase) { 6098 case SPPP_PHASE_DEAD: return "dead"; 6099 case SPPP_PHASE_ESTABLISH: return "establish"; 6100 case SPPP_PHASE_TERMINATE: return "terminate"; 6101 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 6102 case SPPP_PHASE_NETWORK: return "network"; 6103 } 6104 return "illegal"; 6105 } 6106 6107 static const char * 6108 sppp_proto_name(u_short proto) 6109 { 6110 static char buf[12]; 6111 switch (proto) { 6112 case PPP_LCP: return "lcp"; 6113 case PPP_IPCP: return "ipcp"; 6114 case PPP_PAP: return "pap"; 6115 case PPP_CHAP: return "chap"; 6116 case PPP_IPV6CP: return "ipv6cp"; 6117 } 6118 snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto); 6119 return buf; 6120 } 6121 6122 static void 6123 sppp_print_bytes(const u_char *p, u_short len) 6124 { 6125 addlog(" %02x", *p++); 6126 while (--len > 0) 6127 addlog("-%02x", *p++); 6128 } 6129 6130 static void 6131 sppp_print_string(const char *p, u_short len) 6132 { 6133 u_char c; 6134 6135 while (len-- > 0) { 6136 c = *p++; 6137 /* 6138 * Print only ASCII chars directly. RFC 1994 recommends 6139 * using only them, but we don't rely on it. */ 6140 if (c < ' ' || c > '~') 6141 addlog("\\x%x", c); 6142 else 6143 addlog("%c", c); 6144 } 6145 } 6146 6147 static const char * 6148 sppp_dotted_quad(uint32_t addr) 6149 { 6150 static char s[16]; 6151 snprintf(s, sizeof(s), "%d.%d.%d.%d", 6152 (int)((addr >> 24) & 0xff), 6153 (int)((addr >> 16) & 0xff), 6154 (int)((addr >> 8) & 0xff), 6155 (int)(addr & 0xff)); 6156 return s; 6157 } 6158 6159 /* a dummy, used to drop uninteresting events */ 6160 static void 6161 sppp_null(struct sppp *unused) 6162 { 6163 /* do just nothing */ 6164 } 6165 /* 6166 * This file is large. Tell emacs to highlight it nevertheless. 6167 * 6168 * Local Variables: 6169 * hilit-auto-highlight-maxout: 120000 6170 * End: 6171 */ 6172 6173 /* 6174 * Module glue 6175 */ 6176 MODULE(MODULE_CLASS_MISC, sppp_subr, NULL); 6177 6178 static int 6179 sppp_subr_modcmd(modcmd_t cmd, void *arg) 6180 { 6181 switch (cmd) { 6182 case MODULE_CMD_INIT: 6183 case MODULE_CMD_FINI: 6184 return 0; 6185 case MODULE_CMD_STAT: 6186 case MODULE_CMD_AUTOUNLOAD: 6187 default: 6188 return ENOTTY; 6189 } 6190 } 6191 6192 static void 6193 sppp_notify_up(struct sppp *sp) 6194 { 6195 6196 SPPP_LOCK(sp, RW_WRITER); 6197 lcp.Up(sp); 6198 SPPP_UNLOCK(sp); 6199 } 6200 6201 static void 6202 sppp_notify_down(struct sppp *sp) 6203 { 6204 6205 SPPP_LOCK(sp, RW_WRITER); 6206 lcp.Down(sp); 6207 SPPP_UNLOCK(sp); 6208 } 6209 6210 static void 6211 sppp_notify_tls_wlocked(struct sppp *sp) 6212 { 6213 6214 KASSERT(SPPP_WLOCKED(sp)); 6215 6216 if (!sp->pp_tls) 6217 return; 6218 6219 SPPP_UNLOCK(sp); 6220 sp->pp_tls(sp); 6221 SPPP_LOCK(sp, RW_WRITER); 6222 } 6223 6224 static void 6225 sppp_notify_tlf_wlocked(struct sppp *sp) 6226 { 6227 6228 KASSERT(SPPP_WLOCKED(sp)); 6229 6230 if (!sp->pp_tlf) 6231 return; 6232 6233 SPPP_UNLOCK(sp); 6234 sp->pp_tlf(sp); 6235 SPPP_LOCK(sp, RW_WRITER); 6236 } 6237 6238 static void 6239 sppp_notify_con(struct sppp *sp) 6240 { 6241 6242 if (!sp->pp_con) 6243 return; 6244 6245 sp->pp_con(sp); 6246 } 6247 6248 #ifdef INET6 6249 static void 6250 sppp_notify_con_wlocked(struct sppp *sp) 6251 { 6252 6253 KASSERT(SPPP_WLOCKED(sp)); 6254 6255 SPPP_UNLOCK(sp); 6256 sppp_notify_con(sp); 6257 SPPP_LOCK(sp, RW_WRITER); 6258 6259 } 6260 #endif 6261 6262 static void 6263 sppp_notify_chg_wlocked(struct sppp *sp) 6264 { 6265 6266 KASSERT(SPPP_WLOCKED(sp)); 6267 6268 if (!sp->pp_chg) 6269 return; 6270 6271 SPPP_UNLOCK(sp); 6272 sp->pp_chg(sp, sp->pp_phase); 6273 SPPP_LOCK(sp, RW_WRITER); 6274 } 6275
Indexes created Fri Sep 26 08:10:20 GMT 2025