if_spppsubr.c revision 1.209
1 /* $NetBSD: if_spppsubr.c,v 1.209 2020/11/25 10:18:49 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 1.209 2020/11/25 10:18:49 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 #include <sys/param.h> 54 #include <sys/proc.h> 55 #include <sys/systm.h> 56 #include <sys/kernel.h> 57 #include <sys/sockio.h> 58 #include <sys/socket.h> 59 #include <sys/syslog.h> 60 #include <sys/malloc.h> 61 #include <sys/mbuf.h> 62 #include <sys/callout.h> 63 #include <sys/md5.h> 64 #include <sys/inttypes.h> 65 #include <sys/kauth.h> 66 #include <sys/cprng.h> 67 #include <sys/module.h> 68 #include <sys/workqueue.h> 69 #include <sys/atomic.h> 70 #include <sys/compat_stub.h> 71 #include <sys/cpu.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 enum cp_rcr_type { 201 CP_RCR_NONE = 0, /* initial value */ 202 CP_RCR_ACK, /* RCR+ */ 203 CP_RCR_NAK, /* RCR- */ 204 CP_RCR_REJ, /* RCR- */ 205 CP_RCR_DROP, /* DROP message */ 206 CP_RCR_ERR, /* internal error */ 207 }; 208 209 struct ppp_header { 210 uint8_t address; 211 uint8_t control; 212 uint16_t protocol; 213 } __packed; 214 #define PPP_HEADER_LEN sizeof (struct ppp_header) 215 216 struct lcp_header { 217 uint8_t type; 218 uint8_t ident; 219 uint16_t len; 220 } __packed; 221 #define LCP_HEADER_LEN sizeof (struct lcp_header) 222 223 struct cisco_packet { 224 uint32_t type; 225 uint32_t par1; 226 uint32_t par2; 227 uint16_t rel; 228 uint16_t time0; 229 uint16_t time1; 230 } __packed; 231 #define CISCO_PACKET_LEN 18 232 233 /* 234 * We follow the spelling and capitalization of RFC 1661 here, to make 235 * it easier comparing with the standard. Please refer to this RFC in 236 * case you can't make sense out of these abbreviation; it will also 237 * explain the semantics related to the various events and actions. 238 */ 239 struct cp { 240 u_short proto; /* PPP control protocol number */ 241 u_char protoidx; /* index into state table in struct sppp */ 242 u_char flags; 243 #define CP_LCP 0x01 /* this is the LCP */ 244 #define CP_AUTH 0x02 /* this is an authentication protocol */ 245 #define CP_NCP 0x04 /* this is a NCP */ 246 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 247 const char *name; /* name of this control protocol */ 248 /* event handlers */ 249 void (*Up)(struct sppp *, void *); 250 void (*Down)(struct sppp *, void *); 251 void (*Open)(struct sppp *, void *); 252 void (*Close)(struct sppp *, void *); 253 void (*TO)(struct sppp *, void *); 254 /* actions */ 255 void (*tlu)(struct sppp *); 256 void (*tld)(struct sppp *); 257 void (*tls)(const struct cp *, struct sppp *); 258 void (*tlf)(const struct cp *, struct sppp *); 259 void (*scr)(struct sppp *); 260 void (*scan)(const struct cp *, struct sppp *); 261 262 /* message parser */ 263 enum cp_rcr_type 264 (*parse_confreq)(struct sppp *, struct lcp_header *, int, 265 uint8_t **, size_t *, size_t *); 266 void (*parse_confrej)(struct sppp *, struct lcp_header *, int); 267 void (*parse_confnak)(struct sppp *, struct lcp_header *, int); 268 }; 269 270 enum auth_role { 271 SPPP_AUTH_NOROLE = 0, 272 SPPP_AUTH_SERV = __BIT(0), 273 SPPP_AUTH_PEER = __BIT(1), 274 }; 275 276 static struct sppp *spppq; 277 static kmutex_t *spppq_lock = NULL; 278 static callout_t keepalive_ch; 279 280 #define SPPPQ_LOCK() if (spppq_lock) \ 281 mutex_enter(spppq_lock); 282 #define SPPPQ_UNLOCK() if (spppq_lock) \ 283 mutex_exit(spppq_lock); 284 285 #define SPPP_LOCK(_sp, _op) rw_enter(&(_sp)->pp_lock, (_op)) 286 #define SPPP_UNLOCK(_sp) rw_exit(&(_sp)->pp_lock) 287 #define SPPP_WLOCKED(_sp) rw_write_held(&(_sp)->pp_lock) 288 #define SPPP_UPGRADE(_sp) do{ \ 289 SPPP_UNLOCK(_sp); \ 290 SPPP_LOCK(_sp, RW_WRITER); \ 291 }while (0) 292 #define SPPP_DOWNGRADE(_sp) rw_downgrade(&(_sp)->pp_lock) 293 #define SPPP_WQ_SET(_wk, _func, _arg) \ 294 sppp_wq_set((_wk), (_func), __UNCONST((_arg))) 295 296 #ifdef INET 297 #ifndef SPPPSUBR_MPSAFE 298 /* 299 * The following disgusting hack gets around the problem that IP TOS 300 * can't be set yet. We want to put "interactive" traffic on a high 301 * priority queue. To decide if traffic is interactive, we check that 302 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 303 * 304 * XXX is this really still necessary? - joerg - 305 */ 306 static u_short interactive_ports[8] = { 307 0, 513, 0, 0, 308 0, 21, 0, 23, 309 }; 310 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 311 #endif /* SPPPSUBR_MPSAFE */ 312 #endif 313 314 /* almost every function needs these */ 315 #define STDDCL \ 316 struct ifnet *ifp = &sp->pp_if; \ 317 int debug = ifp->if_flags & IFF_DEBUG 318 319 static int sppp_output(struct ifnet *, struct mbuf *, 320 const struct sockaddr *, const struct rtentry *); 321 322 static void sppp_cisco_send(struct sppp *, int, int32_t, int32_t); 323 static void sppp_cisco_input(struct sppp *, struct mbuf *); 324 325 static void sppp_cp_init(const struct cp *, struct sppp *); 326 static void sppp_cp_fini(const struct cp *, struct sppp *); 327 static void sppp_cp_input(const struct cp *, struct sppp *, 328 struct mbuf *); 329 static void sppp_cp_input(const struct cp *, struct sppp *, 330 struct mbuf *); 331 static void sppp_cp_send(struct sppp *, u_short, u_char, 332 u_char, u_short, void *); 333 /* static void sppp_cp_timeout(void *arg); */ 334 static void sppp_cp_change_state(const struct cp *, struct sppp *, int); 335 static struct workqueue * 336 sppp_wq_create(struct sppp *, const char *, pri_t, int, int); 337 static void sppp_wq_destroy(struct sppp *, struct workqueue *); 338 static void sppp_wq_set(struct sppp_work *, 339 void (*)(struct sppp *, void *), void *); 340 static void sppp_wq_add(struct workqueue *, struct sppp_work *); 341 static void sppp_wq_wait(struct workqueue *, struct sppp_work *); 342 static void sppp_cp_to_lcp(void *); 343 static void sppp_cp_to_ipcp(void *); 344 static void sppp_cp_to_ipv6cp(void *); 345 static void sppp_auth_send(const struct cp *, struct sppp *, 346 unsigned int, unsigned int, ...); 347 static int sppp_auth_role(const struct cp *, struct sppp *); 348 static void sppp_auth_to_event(struct sppp *, void *); 349 static void sppp_auth_sca_scn(const struct cp *, struct sppp *); 350 351 static void sppp_up_event(struct sppp *, void *); 352 static void sppp_down_event(struct sppp *, void *); 353 static void sppp_open_event(struct sppp *, void *); 354 static void sppp_close_event(struct sppp *, void *); 355 static void sppp_to_event(struct sppp *, void *); 356 static void sppp_rcr_event(struct sppp *, void *); 357 static void sppp_rca_event(struct sppp *, void *); 358 static void sppp_rcn_event(struct sppp *, void *); 359 static void sppp_rtr_event(struct sppp *, void *); 360 static void sppp_rta_event(struct sppp *, void *); 361 static void sppp_rxj_event(struct sppp *, void *); 362 363 static void sppp_null(struct sppp *); 364 static void sppp_tls(const struct cp *, struct sppp *); 365 static void sppp_tlf(const struct cp *, struct sppp *); 366 static void sppp_sca_scn(const struct cp *, struct sppp *); 367 static void sppp_ifdown(struct sppp *, void *); 368 369 static void sppp_lcp_init(struct sppp *); 370 static void sppp_lcp_up(struct sppp *, void *); 371 static void sppp_lcp_down(struct sppp *, void *); 372 static void sppp_lcp_open(struct sppp *, void *); 373 static enum cp_rcr_type 374 sppp_lcp_confreq(struct sppp *, struct lcp_header *, int, 375 uint8_t **, size_t *, size_t *); 376 static void sppp_lcp_confrej(struct sppp *, struct lcp_header *, int); 377 static void sppp_lcp_confnak(struct sppp *, struct lcp_header *, int); 378 static void sppp_lcp_tlu(struct sppp *); 379 static void sppp_lcp_tld(struct sppp *); 380 static void sppp_lcp_tls(const struct cp *, struct sppp *); 381 static void sppp_lcp_tlf(const struct cp *, struct sppp *); 382 static void sppp_lcp_scr(struct sppp *); 383 static void sppp_lcp_check_and_close(struct sppp *); 384 static int sppp_cp_check(struct sppp *, u_char); 385 386 static void sppp_ipcp_init(struct sppp *); 387 static void sppp_ipcp_open(struct sppp *, void *); 388 static void sppp_ipcp_close(struct sppp *, void *); 389 static enum cp_rcr_type 390 sppp_ipcp_confreq(struct sppp *, struct lcp_header *, int, 391 uint8_t **, size_t *, size_t *); 392 static void sppp_ipcp_confrej(struct sppp *, struct lcp_header *, int); 393 static void sppp_ipcp_confnak(struct sppp *, struct lcp_header *, int); 394 static void sppp_ipcp_tlu(struct sppp *); 395 static void sppp_ipcp_scr(struct sppp *); 396 397 static void sppp_ipv6cp_init(struct sppp *); 398 static void sppp_ipv6cp_open(struct sppp *, void *); 399 static enum cp_rcr_type 400 sppp_ipv6cp_confreq(struct sppp *, struct lcp_header *, int, 401 uint8_t **, size_t *, size_t *); 402 static void sppp_ipv6cp_confrej(struct sppp *, struct lcp_header *, int); 403 static void sppp_ipv6cp_confnak(struct sppp *, struct lcp_header *, int); 404 static void sppp_ipv6cp_tlu(struct sppp *); 405 static void sppp_ipv6cp_scr(struct sppp *); 406 407 static void sppp_pap_input(struct sppp *, struct mbuf *); 408 static void sppp_pap_init(struct sppp *); 409 static void sppp_pap_tlu(struct sppp *); 410 static void sppp_pap_scr(struct sppp *); 411 static void sppp_pap_scr(struct sppp *); 412 413 static void sppp_chap_input(struct sppp *, struct mbuf *); 414 static void sppp_chap_init(struct sppp *); 415 static void sppp_chap_open(struct sppp *, void *); 416 static void sppp_chap_tlu(struct sppp *); 417 static void sppp_chap_scr(struct sppp *); 418 static void sppp_chap_rcv_challenge_event(struct sppp *, void *); 419 420 static const char *sppp_auth_type_name(u_short, u_char); 421 static const char *sppp_cp_type_name(u_char); 422 static const char *sppp_dotted_quad(uint32_t); 423 static const char *sppp_ipcp_opt_name(u_char); 424 #ifdef INET6 425 static const char *sppp_ipv6cp_opt_name(u_char); 426 #endif 427 static const char *sppp_lcp_opt_name(u_char); 428 static const char *sppp_phase_name(int); 429 static const char *sppp_proto_name(u_short); 430 static const char *sppp_state_name(int); 431 static int sppp_params(struct sppp *, u_long, void *); 432 #ifdef INET 433 static void sppp_get_ip_addrs(struct sppp *, uint32_t *, uint32_t *, uint32_t *); 434 static void sppp_set_ip_addrs(struct sppp *); 435 static void sppp_clear_ip_addrs(struct sppp *); 436 #endif 437 static void sppp_keepalive(void *); 438 static void sppp_phase_network(struct sppp *); 439 static void sppp_print_bytes(const u_char *, u_short); 440 static void sppp_print_string(const char *, u_short); 441 #ifdef INET6 442 static void sppp_get_ip6_addrs(struct sppp *, struct in6_addr *, 443 struct in6_addr *, struct in6_addr *); 444 #ifdef IPV6CP_MYIFID_DYN 445 static void sppp_set_ip6_addr(struct sppp *, const struct in6_addr *); 446 static void sppp_gen_ip6_addr(struct sppp *, const struct in6_addr *); 447 #endif 448 static void sppp_suggest_ip6_addr(struct sppp *, struct in6_addr *); 449 #endif 450 451 static void sppp_notify_up(struct sppp *); 452 static void sppp_notify_down(struct sppp *); 453 static void sppp_notify_tls_wlocked(struct sppp *); 454 static void sppp_notify_tlf_wlocked(struct sppp *); 455 #ifdef INET6 456 static void sppp_notify_con_wlocked(struct sppp *); 457 #endif 458 static void sppp_notify_con(struct sppp *); 459 460 static void sppp_notify_chg_wlocked(struct sppp *); 461 462 /* our control protocol descriptors */ 463 static const struct cp lcp = { 464 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 465 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, 466 sppp_close_event, sppp_to_event, 467 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, 468 sppp_lcp_tlf, sppp_lcp_scr, sppp_sca_scn, 469 sppp_lcp_confreq, sppp_lcp_confrej, sppp_lcp_confnak 470 }; 471 472 static const struct cp ipcp = { 473 PPP_IPCP, IDX_IPCP, 474 #ifdef INET 475 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 476 #else 477 0, 478 #endif 479 "ipcp", 480 sppp_up_event, sppp_down_event, sppp_ipcp_open, 481 sppp_ipcp_close, sppp_to_event, 482 sppp_ipcp_tlu, sppp_null, sppp_tls, 483 sppp_tlf, sppp_ipcp_scr, sppp_sca_scn, 484 sppp_ipcp_confreq, sppp_ipcp_confrej, sppp_ipcp_confnak, 485 }; 486 487 static const struct cp ipv6cp = { 488 PPP_IPV6CP, IDX_IPV6CP, 489 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 490 CP_NCP, 491 #else 492 0, 493 #endif 494 "ipv6cp", 495 sppp_up_event, sppp_down_event, sppp_ipv6cp_open, 496 sppp_close_event, sppp_to_event, 497 sppp_ipv6cp_tlu, sppp_null, sppp_tls, 498 sppp_tlf, sppp_ipv6cp_scr, sppp_sca_scn, 499 sppp_ipv6cp_confreq, sppp_ipv6cp_confrej, sppp_ipv6cp_confnak, 500 }; 501 502 static const struct cp pap = { 503 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 504 sppp_up_event, sppp_down_event, sppp_open_event, 505 sppp_close_event, sppp_to_event, 506 sppp_pap_tlu, sppp_null, sppp_tls, sppp_tlf, 507 sppp_pap_scr, sppp_auth_sca_scn, 508 NULL, NULL, NULL 509 }; 510 511 static const struct cp chap = { 512 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 513 sppp_up_event, sppp_down_event, sppp_chap_open, 514 sppp_close_event, sppp_auth_to_event, 515 sppp_chap_tlu, sppp_null, sppp_tls, sppp_tlf, 516 sppp_chap_scr, sppp_auth_sca_scn, 517 NULL, NULL, NULL 518 }; 519 520 static const struct cp *cps[IDX_COUNT] = { 521 &lcp, /* IDX_LCP */ 522 &ipcp, /* IDX_IPCP */ 523 &ipv6cp, /* IDX_IPV6CP */ 524 &pap, /* IDX_PAP */ 525 &chap, /* IDX_CHAP */ 526 }; 527 528 static void 529 sppp_change_phase(struct sppp *sp, int phase) 530 { 531 STDDCL; 532 533 KASSERT(SPPP_WLOCKED(sp)); 534 535 if (sp->pp_phase == phase) 536 return; 537 538 sp->pp_phase = phase; 539 540 if (phase == SPPP_PHASE_NETWORK) 541 if_link_state_change(ifp, LINK_STATE_UP); 542 else 543 if_link_state_change(ifp, LINK_STATE_DOWN); 544 545 if (debug) 546 { 547 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 548 sppp_phase_name(sp->pp_phase)); 549 } 550 } 551 552 /* 553 * Exported functions, comprising our interface to the lower layer. 554 */ 555 556 /* 557 * Process the received packet. 558 */ 559 void 560 sppp_input(struct ifnet *ifp, struct mbuf *m) 561 { 562 struct ppp_header *h = NULL; 563 pktqueue_t *pktq = NULL; 564 struct ifqueue *inq = NULL; 565 uint16_t protocol; 566 struct sppp *sp = (struct sppp *)ifp; 567 int debug = ifp->if_flags & IFF_DEBUG; 568 int isr = 0; 569 570 SPPP_LOCK(sp, RW_READER); 571 572 if (ifp->if_flags & IFF_UP) { 573 /* Count received bytes, add hardware framing */ 574 if_statadd(ifp, if_ibytes, m->m_pkthdr.len + sp->pp_framebytes); 575 /* Note time of last receive */ 576 sp->pp_last_receive = time_uptime; 577 } 578 579 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 580 /* Too small packet, drop it. */ 581 if (debug) 582 log(LOG_DEBUG, 583 "%s: input packet is too small, %d bytes\n", 584 ifp->if_xname, m->m_pkthdr.len); 585 drop: 586 if_statadd2(ifp, if_ierrors, 1, if_iqdrops, 1); 587 m_freem(m); 588 SPPP_UNLOCK(sp); 589 return; 590 } 591 592 if (sp->pp_flags & PP_NOFRAMING) { 593 memcpy(&protocol, mtod(m, void *), 2); 594 protocol = ntohs(protocol); 595 m_adj(m, 2); 596 } else { 597 598 /* Get PPP header. */ 599 h = mtod(m, struct ppp_header *); 600 m_adj(m, PPP_HEADER_LEN); 601 602 switch (h->address) { 603 case PPP_ALLSTATIONS: 604 if (h->control != PPP_UI) 605 goto invalid; 606 if (sp->pp_flags & PP_CISCO) { 607 if (debug) 608 log(LOG_DEBUG, 609 "%s: PPP packet in Cisco mode " 610 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 611 ifp->if_xname, 612 h->address, h->control, ntohs(h->protocol)); 613 goto drop; 614 } 615 break; 616 case CISCO_MULTICAST: 617 case CISCO_UNICAST: 618 /* Don't check the control field here (RFC 1547). */ 619 if (! (sp->pp_flags & PP_CISCO)) { 620 if (debug) 621 log(LOG_DEBUG, 622 "%s: Cisco packet in PPP mode " 623 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 624 ifp->if_xname, 625 h->address, h->control, ntohs(h->protocol)); 626 goto drop; 627 } 628 switch (ntohs(h->protocol)) { 629 default: 630 if_statinc(ifp, if_noproto); 631 goto invalid; 632 case CISCO_KEEPALIVE: 633 SPPP_UNLOCK(sp); 634 sppp_cisco_input((struct sppp *) ifp, m); 635 m_freem(m); 636 return; 637 #ifdef INET 638 case ETHERTYPE_IP: 639 pktq = ip_pktq; 640 break; 641 #endif 642 #ifdef INET6 643 case ETHERTYPE_IPV6: 644 pktq = ip6_pktq; 645 break; 646 #endif 647 } 648 goto queue_pkt; 649 default: /* Invalid PPP packet. */ 650 invalid: 651 if (debug) 652 log(LOG_DEBUG, 653 "%s: invalid input packet " 654 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 655 ifp->if_xname, 656 h->address, h->control, ntohs(h->protocol)); 657 goto drop; 658 } 659 protocol = ntohs(h->protocol); 660 } 661 662 switch (protocol) { 663 default: 664 if (sp->scp[IDX_LCP].state == STATE_OPENED) { 665 uint16_t prot = htons(protocol); 666 667 SPPP_UPGRADE(sp); 668 sppp_cp_send(sp, PPP_LCP, PROTO_REJ, 669 ++sp->scp[IDX_LCP].seq, m->m_pkthdr.len + 2, 670 &prot); 671 SPPP_DOWNGRADE(sp); 672 } 673 if (debug) 674 log(LOG_DEBUG, 675 "%s: invalid input protocol " 676 "<proto=0x%x>\n", ifp->if_xname, ntohs(protocol)); 677 if_statinc(ifp, if_noproto); 678 goto drop; 679 case PPP_LCP: 680 SPPP_UNLOCK(sp); 681 sppp_cp_input(&lcp, sp, m); 682 m_freem(m); 683 return; 684 case PPP_PAP: 685 SPPP_UNLOCK(sp); 686 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 687 sppp_pap_input(sp, m); 688 } 689 m_freem(m); 690 return; 691 case PPP_CHAP: 692 SPPP_UNLOCK(sp); 693 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 694 sppp_chap_input(sp, m); 695 } 696 m_freem(m); 697 return; 698 #ifdef INET 699 case PPP_IPCP: 700 SPPP_UNLOCK(sp); 701 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 702 sppp_cp_input(&ipcp, sp, m); 703 } 704 m_freem(m); 705 return; 706 case PPP_IP: 707 if (sp->scp[IDX_IPCP].state == STATE_OPENED) { 708 sp->pp_last_activity = time_uptime; 709 pktq = ip_pktq; 710 } 711 break; 712 #endif 713 #ifdef INET6 714 case PPP_IPV6CP: 715 SPPP_UNLOCK(sp); 716 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 717 sppp_cp_input(&ipv6cp, sp, m); 718 } 719 m_freem(m); 720 return; 721 722 case PPP_IPV6: 723 if (sp->scp[IDX_IPV6CP].state == STATE_OPENED) { 724 sp->pp_last_activity = time_uptime; 725 pktq = ip6_pktq; 726 } 727 break; 728 #endif 729 } 730 731 queue_pkt: 732 if ((ifp->if_flags & IFF_UP) == 0 || (!inq && !pktq)) { 733 goto drop; 734 } 735 736 /* Check queue. */ 737 if (__predict_true(pktq)) { 738 if (__predict_false(!pktq_enqueue(pktq, m, 0))) { 739 goto drop; 740 } 741 SPPP_UNLOCK(sp); 742 return; 743 } 744 745 SPPP_UNLOCK(sp); 746 747 IFQ_LOCK(inq); 748 if (IF_QFULL(inq)) { 749 /* Queue overflow. */ 750 IF_DROP(inq); 751 IFQ_UNLOCK(inq); 752 if (debug) 753 log(LOG_DEBUG, "%s: protocol queue overflow\n", 754 ifp->if_xname); 755 756 SPPP_LOCK(sp, RW_READER); 757 goto drop; 758 } 759 IF_ENQUEUE(inq, m); 760 IFQ_UNLOCK(inq); 761 schednetisr(isr); 762 } 763 764 /* 765 * Enqueue transmit packet. 766 */ 767 static int 768 sppp_output(struct ifnet *ifp, struct mbuf *m, 769 const struct sockaddr *dst, const struct rtentry *rt) 770 { 771 struct sppp *sp = (struct sppp *) ifp; 772 struct ppp_header *h = NULL; 773 #ifndef SPPPSUBR_MPSAFE 774 struct ifqueue *ifq = NULL; /* XXX */ 775 #endif 776 int s, error = 0; 777 uint16_t protocol; 778 size_t pktlen; 779 780 s = splnet(); 781 SPPP_LOCK(sp, RW_READER); 782 783 sp->pp_last_activity = time_uptime; 784 785 if ((ifp->if_flags & IFF_UP) == 0 || 786 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 787 SPPP_UNLOCK(sp); 788 splx(s); 789 790 m_freem(m); 791 792 return (ENETDOWN); 793 } 794 795 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 796 /* 797 * Interface is not yet running, but auto-dial. Need 798 * to start LCP for it. 799 */ 800 ifp->if_flags |= IFF_RUNNING; 801 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 802 } 803 804 /* 805 * If the queueing discipline needs packet classification, 806 * do it before prepending link headers. 807 */ 808 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family); 809 810 #ifdef INET 811 if (dst->sa_family == AF_INET) { 812 struct ip *ip = NULL; 813 #ifndef SPPPSUBR_MPSAFE 814 struct tcphdr *th = NULL; 815 #endif 816 817 if (m->m_len >= sizeof(struct ip)) { 818 ip = mtod(m, struct ip *); 819 #ifndef SPPPSUBR_MPSAFE 820 if (ip->ip_p == IPPROTO_TCP && 821 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + 822 sizeof(struct tcphdr)) { 823 th = (struct tcphdr *) 824 ((char *)ip + (ip->ip_hl << 2)); 825 } 826 #endif 827 } else 828 ip = NULL; 829 830 /* 831 * When using dynamic local IP address assignment by using 832 * 0.0.0.0 as a local address, the first TCP session will 833 * not connect because the local TCP checksum is computed 834 * using 0.0.0.0 which will later become our real IP address 835 * so the TCP checksum computed at the remote end will 836 * become invalid. So we 837 * - don't let packets with src ip addr 0 thru 838 * - we flag TCP packets with src ip 0 as an error 839 */ 840 if (ip && ip->ip_src.s_addr == INADDR_ANY) { 841 uint8_t proto = ip->ip_p; 842 843 SPPP_UNLOCK(sp); 844 splx(s); 845 846 m_freem(m); 847 if (proto == IPPROTO_TCP) 848 return (EADDRNOTAVAIL); 849 else 850 return (0); 851 } 852 853 #ifndef SPPPSUBR_MPSAFE 854 /* 855 * Put low delay, telnet, rlogin and ftp control packets 856 * in front of the queue. 857 */ 858 if (!IF_QFULL(&sp->pp_fastq) && 859 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 860 (th && (INTERACTIVE(ntohs(th->th_sport)) || 861 INTERACTIVE(ntohs(th->th_dport)))))) 862 ifq = &sp->pp_fastq; 863 #endif /* !SPPPSUBR_MPSAFE */ 864 } 865 #endif 866 867 #ifdef INET6 868 if (dst->sa_family == AF_INET6) { 869 /* XXX do something tricky here? */ 870 } 871 #endif 872 873 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 874 /* 875 * Prepend general data packet PPP header. For now, IP only. 876 */ 877 M_PREPEND(m, PPP_HEADER_LEN, M_DONTWAIT); 878 if (! m) { 879 if (ifp->if_flags & IFF_DEBUG) 880 log(LOG_DEBUG, "%s: no memory for transmit header\n", 881 ifp->if_xname); 882 if_statinc(ifp, if_oerrors); 883 SPPP_UNLOCK(sp); 884 splx(s); 885 return (ENOBUFS); 886 } 887 /* 888 * May want to check size of packet 889 * (albeit due to the implementation it's always enough) 890 */ 891 h = mtod(m, struct ppp_header *); 892 if (sp->pp_flags & PP_CISCO) { 893 h->address = CISCO_UNICAST; /* unicast address */ 894 h->control = 0; 895 } else { 896 h->address = PPP_ALLSTATIONS; /* broadcast address */ 897 h->control = PPP_UI; /* Unnumbered Info */ 898 } 899 } 900 901 switch (dst->sa_family) { 902 #ifdef INET 903 case AF_INET: /* Internet Protocol */ 904 if (sp->pp_flags & PP_CISCO) 905 protocol = htons(ETHERTYPE_IP); 906 else { 907 /* 908 * Don't choke with an ENETDOWN early. It's 909 * possible that we just started dialing out, 910 * so don't drop the packet immediately. If 911 * we notice that we run out of buffer space 912 * below, we will however remember that we are 913 * not ready to carry IP packets, and return 914 * ENETDOWN, as opposed to ENOBUFS. 915 */ 916 protocol = htons(PPP_IP); 917 if (sp->scp[IDX_IPCP].state != STATE_OPENED) 918 error = ENETDOWN; 919 } 920 break; 921 #endif 922 #ifdef INET6 923 case AF_INET6: /* Internet Protocol version 6 */ 924 if (sp->pp_flags & PP_CISCO) 925 protocol = htons(ETHERTYPE_IPV6); 926 else { 927 /* 928 * Don't choke with an ENETDOWN early. It's 929 * possible that we just started dialing out, 930 * so don't drop the packet immediately. If 931 * we notice that we run out of buffer space 932 * below, we will however remember that we are 933 * not ready to carry IP packets, and return 934 * ENETDOWN, as opposed to ENOBUFS. 935 */ 936 protocol = htons(PPP_IPV6); 937 if (sp->scp[IDX_IPV6CP].state != STATE_OPENED) 938 error = ENETDOWN; 939 } 940 break; 941 #endif 942 default: 943 m_freem(m); 944 if_statinc(ifp, if_oerrors); 945 SPPP_UNLOCK(sp); 946 splx(s); 947 return (EAFNOSUPPORT); 948 } 949 950 if (sp->pp_flags & PP_NOFRAMING) { 951 M_PREPEND(m, 2, M_DONTWAIT); 952 if (m == NULL) { 953 if (ifp->if_flags & IFF_DEBUG) 954 log(LOG_DEBUG, "%s: no memory for transmit header\n", 955 ifp->if_xname); 956 if_statinc(ifp, if_oerrors); 957 SPPP_UNLOCK(sp); 958 splx(s); 959 return (ENOBUFS); 960 } 961 *mtod(m, uint16_t *) = protocol; 962 } else { 963 h->protocol = protocol; 964 } 965 966 pktlen = m->m_pkthdr.len; 967 #ifdef SPPPSUBR_MPSAFE 968 SPPP_UNLOCK(sp); 969 error = if_transmit_lock(ifp, m); 970 SPPP_LOCK(sp, RW_READER); 971 if (error == 0) 972 if_statadd(ifp, if_obytes, pktlen + sp->pp_framebytes); 973 #else /* !SPPPSUBR_MPSAFE */ 974 error = ifq_enqueue2(ifp, ifq, m); 975 976 if (error == 0) { 977 /* 978 * Count output packets and bytes. 979 * The packet length includes header + additional hardware 980 * framing according to RFC 1333. 981 */ 982 if (!(ifp->if_flags & IFF_OACTIVE)) { 983 SPPP_UNLOCK(sp); 984 if_start_lock(ifp); 985 SPPP_LOCK(sp, RW_READER); 986 } 987 if_statadd(ifp, if_obytes, pktlen + sp->pp_framebytes); 988 } 989 #endif /* !SPPPSUBR_MPSAFE */ 990 SPPP_UNLOCK(sp); 991 splx(s); 992 return error; 993 } 994 995 void 996 sppp_attach(struct ifnet *ifp) 997 { 998 struct sppp *sp = (struct sppp *) ifp; 999 char xnamebuf[MAXCOMLEN]; 1000 1001 /* Initialize keepalive handler. */ 1002 if (! spppq) { 1003 callout_init(&keepalive_ch, CALLOUT_MPSAFE); 1004 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 1005 } 1006 1007 if (! spppq_lock) 1008 spppq_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_SOFTNET); 1009 1010 sp->pp_if.if_type = IFT_PPP; 1011 sp->pp_if.if_output = sppp_output; 1012 sp->pp_fastq.ifq_maxlen = 32; 1013 sp->pp_cpq.ifq_maxlen = 20; 1014 sp->pp_loopcnt = 0; 1015 sp->pp_alivecnt = 0; 1016 sp->pp_last_activity = 0; 1017 sp->pp_last_receive = 0; 1018 sp->pp_maxalive = DEFAULT_MAXALIVECNT; 1019 sp->pp_max_noreceive = DEFAULT_NORECV_TIME; 1020 sp->pp_idle_timeout = 0; 1021 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 1022 sp->pp_phase = SPPP_PHASE_DEAD; 1023 sp->pp_up = sppp_notify_up; 1024 sp->pp_down = sppp_notify_down; 1025 sppp_wq_set(&sp->work_ifdown, sppp_ifdown, NULL); 1026 memset(sp->scp, 0, sizeof(sp->scp)); 1027 rw_init(&sp->pp_lock); 1028 1029 if_alloc_sadl(ifp); 1030 1031 /* Lets not beat about the bush, we know we're down. */ 1032 ifp->if_link_state = LINK_STATE_DOWN; 1033 1034 snprintf(xnamebuf, sizeof(xnamebuf), "%s.wq_cp", ifp->if_xname); 1035 sp->wq_cp = sppp_wq_create(sp, xnamebuf, 1036 PRI_SOFTNET, IPL_SOFTNET, WQ_MPSAFE); 1037 1038 memset(&sp->myauth, 0, sizeof sp->myauth); 1039 memset(&sp->hisauth, 0, sizeof sp->hisauth); 1040 SPPP_LOCK(sp, RW_WRITER); 1041 sppp_lcp_init(sp); 1042 sppp_ipcp_init(sp); 1043 sppp_ipv6cp_init(sp); 1044 sppp_pap_init(sp); 1045 sppp_chap_init(sp); 1046 SPPP_UNLOCK(sp); 1047 1048 SPPPQ_LOCK(); 1049 /* Insert new entry into the keepalive list. */ 1050 sp->pp_next = spppq; 1051 spppq = sp; 1052 SPPPQ_UNLOCK(); 1053 } 1054 1055 void 1056 sppp_detach(struct ifnet *ifp) 1057 { 1058 struct sppp **q, *p, *sp = (struct sppp *) ifp; 1059 1060 /* Remove the entry from the keepalive list. */ 1061 SPPPQ_LOCK(); 1062 for (q = &spppq; (p = *q); q = &p->pp_next) 1063 if (p == sp) { 1064 *q = p->pp_next; 1065 break; 1066 } 1067 SPPPQ_UNLOCK(); 1068 1069 if (! spppq) { 1070 /* Stop keepalive handler. */ 1071 callout_stop(&keepalive_ch); 1072 mutex_obj_free(spppq_lock); 1073 spppq_lock = NULL; 1074 } 1075 1076 SPPP_LOCK(sp, RW_WRITER); 1077 1078 sppp_cp_fini(&lcp, sp); 1079 sppp_cp_fini(&ipcp, sp); 1080 sppp_cp_fini(&pap, sp); 1081 sppp_cp_fini(&chap, sp); 1082 #ifdef INET6 1083 sppp_cp_fini(&ipv6cp, sp); 1084 #endif 1085 sppp_wq_destroy(sp, sp->wq_cp); 1086 1087 /* free authentication info */ 1088 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 1089 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 1090 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 1091 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 1092 SPPP_UNLOCK(sp); 1093 rw_destroy(&sp->pp_lock); 1094 } 1095 1096 /* 1097 * Flush the interface output queue. 1098 */ 1099 void 1100 sppp_flush(struct ifnet *ifp) 1101 { 1102 struct sppp *sp = (struct sppp *) ifp; 1103 1104 SPPP_LOCK(sp, RW_WRITER); 1105 IFQ_PURGE(&sp->pp_if.if_snd); 1106 IF_PURGE(&sp->pp_fastq); 1107 IF_PURGE(&sp->pp_cpq); 1108 SPPP_UNLOCK(sp); 1109 } 1110 1111 /* 1112 * Check if the output queue is empty. 1113 */ 1114 int 1115 sppp_isempty(struct ifnet *ifp) 1116 { 1117 struct sppp *sp = (struct sppp *) ifp; 1118 int empty, s; 1119 1120 s = splnet(); 1121 SPPP_LOCK(sp, RW_READER); 1122 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1123 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1124 SPPP_UNLOCK(sp); 1125 splx(s); 1126 return (empty); 1127 } 1128 1129 /* 1130 * Get next packet to send. 1131 */ 1132 struct mbuf * 1133 sppp_dequeue(struct ifnet *ifp) 1134 { 1135 struct sppp *sp = (struct sppp *) ifp; 1136 struct mbuf *m; 1137 int s; 1138 1139 s = splnet(); 1140 SPPP_LOCK(sp, RW_WRITER); 1141 /* 1142 * Process only the control protocol queue until we have at 1143 * least one NCP open. 1144 * 1145 * Do always serve all three queues in Cisco mode. 1146 */ 1147 IF_DEQUEUE(&sp->pp_cpq, m); 1148 if (m == NULL && 1149 (sppp_cp_check(sp, CP_NCP) || (sp->pp_flags & PP_CISCO) != 0)) { 1150 IF_DEQUEUE(&sp->pp_fastq, m); 1151 if (m == NULL) 1152 IFQ_DEQUEUE(&sp->pp_if.if_snd, m); 1153 } 1154 SPPP_UNLOCK(sp); 1155 splx(s); 1156 return m; 1157 } 1158 1159 /* 1160 * Process an ioctl request. Called on low priority level. 1161 */ 1162 int 1163 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1164 { 1165 struct lwp *l = curlwp; /* XXX */ 1166 struct ifreq *ifr = (struct ifreq *) data; 1167 struct ifaddr *ifa = (struct ifaddr *) data; 1168 struct sppp *sp = (struct sppp *) ifp; 1169 int s, error=0, going_up, going_down; 1170 u_short newmode; 1171 1172 s = splnet(); 1173 switch (cmd) { 1174 case SIOCINITIFADDR: 1175 ifa->ifa_rtrequest = p2p_rtrequest; 1176 break; 1177 1178 case SIOCSIFFLAGS: 1179 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1180 break; 1181 1182 SPPP_LOCK(sp, RW_WRITER); 1183 going_up = ifp->if_flags & IFF_UP && 1184 (ifp->if_flags & IFF_RUNNING) == 0; 1185 going_down = (ifp->if_flags & IFF_UP) == 0 && 1186 ifp->if_flags & IFF_RUNNING; 1187 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1188 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1189 /* sanity */ 1190 newmode = IFF_PASSIVE; 1191 ifp->if_flags &= ~IFF_AUTO; 1192 } 1193 1194 if (going_up || going_down) { 1195 sp->lcp.reestablish = false; 1196 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 1197 } 1198 if (going_up && newmode == 0) { 1199 /* neither auto-dial nor passive */ 1200 ifp->if_flags |= IFF_RUNNING; 1201 if (!(sp->pp_flags & PP_CISCO)) { 1202 sppp_wq_add(sp->wq_cp, 1203 &sp->scp[IDX_LCP].work_open); 1204 } 1205 } else if (going_down) { 1206 SPPP_UNLOCK(sp); 1207 sppp_flush(ifp); 1208 SPPP_LOCK(sp, RW_WRITER); 1209 1210 ifp->if_flags &= ~IFF_RUNNING; 1211 } 1212 SPPP_UNLOCK(sp); 1213 break; 1214 1215 case SIOCSIFMTU: 1216 if (ifr->ifr_mtu < PPP_MINMRU || 1217 ifr->ifr_mtu > sp->lcp.their_mru) { 1218 error = EINVAL; 1219 break; 1220 } 1221 /*FALLTHROUGH*/ 1222 case SIOCGIFMTU: 1223 if ((error = ifioctl_common(ifp, cmd, data)) == ENETRESET) 1224 error = 0; 1225 break; 1226 case SIOCADDMULTI: 1227 case SIOCDELMULTI: 1228 break; 1229 1230 case SPPPSETAUTHCFG: 1231 case SPPPSETLCPCFG: 1232 case SPPPSETIDLETO: 1233 case SPPPSETAUTHFAILURE: 1234 case SPPPSETDNSOPTS: 1235 case SPPPSETKEEPALIVE: 1236 #if defined(COMPAT_50) || defined(MODULAR) 1237 case __SPPPSETIDLETO50: 1238 case __SPPPSETKEEPALIVE50: 1239 #endif /* COMPAT_50 || MODULAR */ 1240 error = kauth_authorize_network(l->l_cred, 1241 KAUTH_NETWORK_INTERFACE, 1242 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, 1243 NULL); 1244 if (error) 1245 break; 1246 error = sppp_params(sp, cmd, data); 1247 break; 1248 1249 case SPPPGETAUTHCFG: 1250 case SPPPGETLCPCFG: 1251 case SPPPGETAUTHFAILURES: 1252 error = kauth_authorize_network(l->l_cred, 1253 KAUTH_NETWORK_INTERFACE, 1254 KAUTH_REQ_NETWORK_INTERFACE_GETPRIV, ifp, (void *)cmd, 1255 NULL); 1256 if (error) 1257 break; 1258 error = sppp_params(sp, cmd, data); 1259 break; 1260 1261 case SPPPGETSTATUS: 1262 case SPPPGETSTATUSNCP: 1263 case SPPPGETIDLETO: 1264 case SPPPGETDNSOPTS: 1265 case SPPPGETDNSADDRS: 1266 case SPPPGETKEEPALIVE: 1267 #if defined(COMPAT_50) || defined(MODULAR) 1268 case __SPPPGETIDLETO50: 1269 case __SPPPGETKEEPALIVE50: 1270 #endif /* COMPAT_50 || MODULAR */ 1271 error = sppp_params(sp, cmd, data); 1272 break; 1273 1274 default: 1275 error = ifioctl_common(ifp, cmd, data); 1276 break; 1277 } 1278 splx(s); 1279 return (error); 1280 } 1281 1282 /* 1283 * Cisco framing implementation. 1284 */ 1285 1286 /* 1287 * Handle incoming Cisco keepalive protocol packets. 1288 */ 1289 static void 1290 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1291 { 1292 STDDCL; 1293 struct cisco_packet *h; 1294 #ifdef INET 1295 uint32_t me, mymask = 0; /* XXX: GCC */ 1296 #endif 1297 1298 SPPP_LOCK(sp, RW_WRITER); 1299 1300 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1301 if (debug) 1302 log(LOG_DEBUG, 1303 "%s: cisco invalid packet length: %d bytes\n", 1304 ifp->if_xname, m->m_pkthdr.len); 1305 SPPP_UNLOCK(sp); 1306 return; 1307 } 1308 h = mtod(m, struct cisco_packet *); 1309 if (debug) 1310 log(LOG_DEBUG, 1311 "%s: cisco input: %d bytes " 1312 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1313 ifp->if_xname, m->m_pkthdr.len, 1314 ntohl(h->type), h->par1, h->par2, (u_int)h->rel, 1315 (u_int)h->time0, (u_int)h->time1); 1316 switch (ntohl(h->type)) { 1317 default: 1318 if (debug) 1319 addlog("%s: cisco unknown packet type: 0x%x\n", 1320 ifp->if_xname, ntohl(h->type)); 1321 break; 1322 case CISCO_ADDR_REPLY: 1323 /* Reply on address request, ignore */ 1324 break; 1325 case CISCO_KEEPALIVE_REQ: 1326 sp->pp_alivecnt = 0; 1327 sp->scp[IDX_LCP].rseq = ntohl(h->par1); 1328 if (sp->scp[IDX_LCP].seq == sp->scp[IDX_LCP].rseq) { 1329 /* Local and remote sequence numbers are equal. 1330 * Probably, the line is in loopback mode. */ 1331 if (sp->pp_loopcnt >= LOOPALIVECNT) { 1332 printf ("%s: loopback\n", 1333 ifp->if_xname); 1334 sp->pp_loopcnt = 0; 1335 if (ifp->if_flags & IFF_UP) { 1336 SPPP_UNLOCK(sp); 1337 if_down(ifp); 1338 SPPP_LOCK(sp, RW_WRITER); 1339 1340 IF_PURGE(&sp->pp_cpq); 1341 } 1342 } 1343 ++sp->pp_loopcnt; 1344 1345 /* Generate new local sequence number */ 1346 sp->scp[IDX_LCP].seq = cprng_fast32(); 1347 break; 1348 } 1349 sp->pp_loopcnt = 0; 1350 if (! (ifp->if_flags & IFF_UP) && 1351 (ifp->if_flags & IFF_RUNNING)) { 1352 SPPP_UNLOCK(sp); 1353 if_up(ifp); 1354 SPPP_LOCK(sp, RW_WRITER); 1355 } 1356 break; 1357 case CISCO_ADDR_REQ: 1358 #ifdef INET 1359 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1360 if (me != 0L) 1361 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1362 #endif 1363 break; 1364 } 1365 SPPP_UNLOCK(sp); 1366 } 1367 1368 /* 1369 * Send Cisco keepalive packet. 1370 */ 1371 static void 1372 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1373 { 1374 STDDCL; 1375 struct ppp_header *h; 1376 struct cisco_packet *ch; 1377 struct mbuf *m; 1378 uint32_t t; 1379 1380 KASSERT(SPPP_WLOCKED(sp)); 1381 1382 t = time_uptime * 1000; 1383 MGETHDR(m, M_DONTWAIT, MT_DATA); 1384 if (! m) 1385 return; 1386 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1387 m_reset_rcvif(m); 1388 1389 h = mtod(m, struct ppp_header *); 1390 h->address = CISCO_MULTICAST; 1391 h->control = 0; 1392 h->protocol = htons(CISCO_KEEPALIVE); 1393 1394 ch = (struct cisco_packet *)(h + 1); 1395 ch->type = htonl(type); 1396 ch->par1 = htonl(par1); 1397 ch->par2 = htonl(par2); 1398 ch->rel = -1; 1399 1400 ch->time0 = htons((u_short)(t >> 16)); 1401 ch->time1 = htons((u_short) t); 1402 1403 if (debug) 1404 log(LOG_DEBUG, 1405 "%s: cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1406 ifp->if_xname, ntohl(ch->type), ch->par1, 1407 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1408 (u_int)ch->time1); 1409 1410 if (IF_QFULL(&sp->pp_cpq)) { 1411 IF_DROP(&sp->pp_fastq); 1412 IF_DROP(&ifp->if_snd); 1413 m_freem(m); 1414 if_statinc(ifp, if_oerrors); 1415 return; 1416 } 1417 1418 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 1419 IF_ENQUEUE(&sp->pp_cpq, m); 1420 1421 if (! (ifp->if_flags & IFF_OACTIVE)) { 1422 SPPP_UNLOCK(sp); 1423 if_start_lock(ifp); 1424 SPPP_LOCK(sp, RW_WRITER); 1425 } 1426 } 1427 1428 /* 1429 * PPP protocol implementation. 1430 */ 1431 1432 /* 1433 * Send PPP control protocol packet. 1434 */ 1435 static void 1436 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1437 u_char ident, u_short len, void *data) 1438 { 1439 STDDCL; 1440 struct lcp_header *lh; 1441 struct mbuf *m; 1442 size_t pkthdrlen; 1443 1444 KASSERT(SPPP_WLOCKED(sp)); 1445 1446 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1447 1448 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1449 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1450 MGETHDR(m, M_DONTWAIT, MT_DATA); 1451 if (! m) { 1452 return; 1453 } 1454 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1455 m_reset_rcvif(m); 1456 1457 if (sp->pp_flags & PP_NOFRAMING) { 1458 *mtod(m, uint16_t *) = htons(proto); 1459 lh = (struct lcp_header *)(mtod(m, uint8_t *) + 2); 1460 } else { 1461 struct ppp_header *h; 1462 h = mtod(m, struct ppp_header *); 1463 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1464 h->control = PPP_UI; /* Unnumbered Info */ 1465 h->protocol = htons(proto); /* Link Control Protocol */ 1466 lh = (struct lcp_header *)(h + 1); 1467 } 1468 lh->type = type; 1469 lh->ident = ident; 1470 lh->len = htons(LCP_HEADER_LEN + len); 1471 if (len) 1472 memcpy(lh + 1, data, len); 1473 1474 if (debug) { 1475 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 1476 ifp->if_xname, 1477 sppp_proto_name(proto), 1478 sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len)); 1479 if (len) 1480 sppp_print_bytes((u_char *)(lh + 1), len); 1481 addlog(">\n"); 1482 } 1483 if (IF_QFULL(&sp->pp_cpq)) { 1484 IF_DROP(&sp->pp_fastq); 1485 IF_DROP(&ifp->if_snd); 1486 m_freem(m); 1487 if_statinc(ifp, if_oerrors); 1488 return; 1489 } 1490 1491 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 1492 IF_ENQUEUE(&sp->pp_cpq, m); 1493 1494 if (! (ifp->if_flags & IFF_OACTIVE)) { 1495 SPPP_UNLOCK(sp); 1496 if_start_lock(ifp); 1497 SPPP_LOCK(sp, RW_WRITER); 1498 } 1499 } 1500 1501 static void 1502 sppp_cp_to_lcp(void *xsp) 1503 { 1504 struct sppp *sp = xsp; 1505 1506 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_to); 1507 } 1508 1509 static void 1510 sppp_cp_to_ipcp(void *xsp) 1511 { 1512 struct sppp *sp = xsp; 1513 1514 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_IPCP].work_to); 1515 } 1516 1517 static void 1518 sppp_cp_to_ipv6cp(void *xsp) 1519 { 1520 struct sppp *sp = xsp; 1521 1522 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_IPV6CP].work_to); 1523 } 1524 1525 static void 1526 sppp_cp_to_pap(void *xsp) 1527 { 1528 struct sppp *sp = xsp; 1529 1530 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_to); 1531 } 1532 1533 static void 1534 sppp_cp_to_chap(void *xsp) 1535 { 1536 struct sppp *sp = xsp; 1537 1538 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_to); 1539 } 1540 1541 static void 1542 sppp_cp_init(const struct cp *cp, struct sppp *sp) 1543 { 1544 struct sppp_cp *scp; 1545 typedef void (*sppp_co_cb_t)(void *); 1546 static const sppp_co_cb_t to_cb[IDX_COUNT] = { 1547 [IDX_LCP] = sppp_cp_to_lcp, 1548 [IDX_IPCP] = sppp_cp_to_ipcp, 1549 [IDX_IPV6CP] = sppp_cp_to_ipv6cp, 1550 [IDX_PAP] = sppp_cp_to_pap, 1551 [IDX_CHAP] = sppp_cp_to_chap, 1552 }; 1553 1554 scp = &sp->scp[cp->protoidx]; 1555 scp->state = STATE_INITIAL; 1556 scp->fail_counter = 0; 1557 scp->seq = 0; 1558 scp->rseq = 0; 1559 1560 SPPP_WQ_SET(&scp->work_up, cp->Up, cp); 1561 SPPP_WQ_SET(&scp->work_down, cp->Down, cp); 1562 SPPP_WQ_SET(&scp->work_open, cp->Open, cp); 1563 SPPP_WQ_SET(&scp->work_close, cp->Close, cp); 1564 SPPP_WQ_SET(&scp->work_to, cp->TO, cp); 1565 SPPP_WQ_SET(&scp->work_rcr, sppp_rcr_event, cp); 1566 SPPP_WQ_SET(&scp->work_rca, sppp_rca_event, cp); 1567 SPPP_WQ_SET(&scp->work_rcn, sppp_rcn_event, cp); 1568 SPPP_WQ_SET(&scp->work_rtr, sppp_rtr_event, cp); 1569 SPPP_WQ_SET(&scp->work_rta, sppp_rta_event, cp); 1570 SPPP_WQ_SET(&scp->work_rxj, sppp_rxj_event, cp); 1571 1572 callout_init(&scp->ch, CALLOUT_MPSAFE); 1573 callout_setfunc(&scp->ch, to_cb[cp->protoidx], sp); 1574 } 1575 1576 static void 1577 sppp_cp_fini(const struct cp *cp, struct sppp *sp) 1578 { 1579 struct sppp_cp *scp; 1580 scp = &sp->scp[cp->protoidx]; 1581 1582 sppp_wq_wait(sp->wq_cp, &scp->work_up); 1583 sppp_wq_wait(sp->wq_cp, &scp->work_down); 1584 sppp_wq_wait(sp->wq_cp, &scp->work_open); 1585 sppp_wq_wait(sp->wq_cp, &scp->work_close); 1586 sppp_wq_wait(sp->wq_cp, &scp->work_to); 1587 sppp_wq_wait(sp->wq_cp, &scp->work_rcr); 1588 sppp_wq_wait(sp->wq_cp, &scp->work_rca); 1589 sppp_wq_wait(sp->wq_cp, &scp->work_rcn); 1590 sppp_wq_wait(sp->wq_cp, &scp->work_rtr); 1591 sppp_wq_wait(sp->wq_cp, &scp->work_rta); 1592 sppp_wq_wait(sp->wq_cp, &scp->work_rxj); 1593 1594 callout_halt(&scp->ch, NULL); 1595 callout_destroy(&scp->ch); 1596 } 1597 1598 /* 1599 * Handle incoming PPP control protocol packets. 1600 */ 1601 static void 1602 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1603 { 1604 STDDCL; 1605 struct lcp_header *h; 1606 int printlen, len = m->m_pkthdr.len; 1607 enum cp_rcr_type type; 1608 size_t blen, rlen; 1609 u_char *p; 1610 uint32_t u32; 1611 uint8_t *buf; 1612 1613 SPPP_LOCK(sp, RW_WRITER); 1614 1615 if (len < 4) { 1616 if (debug) 1617 log(LOG_DEBUG, 1618 "%s: %s invalid packet length: %d bytes\n", 1619 ifp->if_xname, cp->name, len); 1620 SPPP_UNLOCK(sp); 1621 return; 1622 } 1623 h = mtod(m, struct lcp_header *); 1624 if (debug) { 1625 printlen = ntohs(h->len); 1626 log(LOG_DEBUG, 1627 "%s: %s input(%s): <%s id=0x%x len=%d", 1628 ifp->if_xname, cp->name, 1629 sppp_state_name(sp->scp[cp->protoidx].state), 1630 sppp_cp_type_name(h->type), h->ident, printlen); 1631 if (len < printlen) 1632 printlen = len; 1633 if (printlen > 4) 1634 sppp_print_bytes((u_char *)(h + 1), printlen - 4); 1635 addlog(">\n"); 1636 } 1637 if (len > ntohs(h->len)) 1638 len = ntohs(h->len); 1639 p = (u_char *)(h + 1); 1640 switch (h->type) { 1641 case CONF_REQ: 1642 if (len < 4) { 1643 if (debug) 1644 addlog("%s: %s invalid conf-req length %d\n", 1645 ifp->if_xname, cp->name, 1646 len); 1647 if_statinc(ifp, if_ierrors); 1648 break; 1649 } 1650 1651 buf = NULL; 1652 blen = 0; 1653 rlen = 0; 1654 1655 type = (cp->parse_confreq)(sp, h, len, 1656 &buf, &blen, &rlen); 1657 1658 if (type == CP_RCR_ERR) { 1659 /* fatal error, shut down */ 1660 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 1661 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 1662 } else if (buf != NULL) { 1663 if (sp->scp[cp->protoidx].rcr_buf != NULL) { 1664 kmem_intr_free(sp->scp[cp->protoidx].rcr_buf, 1665 sp->scp[cp->protoidx].rcr_blen); 1666 } 1667 1668 sp->scp[cp->protoidx].rcr_buf = (void *)buf; 1669 buf = NULL; 1670 1671 sp->scp[cp->protoidx].rcr_blen = blen; 1672 sp->scp[cp->protoidx].rcr_rlen = rlen; 1673 sp->scp[cp->protoidx].rcr_type = type; 1674 sp->scp[cp->protoidx].rconfid = h->ident; 1675 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rcr); 1676 } 1677 break; 1678 case CONF_ACK: 1679 if (h->ident != sp->scp[cp->protoidx].confid) { 1680 if (debug) 1681 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1682 ifp->if_xname, cp->name, 1683 h->ident, sp->scp[cp->protoidx].confid); 1684 if_statinc(ifp, if_ierrors); 1685 break; 1686 } 1687 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rca); 1688 break; 1689 case CONF_NAK: 1690 case CONF_REJ: 1691 if (h->ident != sp->scp[cp->protoidx].confid) { 1692 if (debug) 1693 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1694 ifp->if_xname, cp->name, 1695 h->ident, sp->scp[cp->protoidx].confid); 1696 if_statinc(ifp, if_ierrors); 1697 break; 1698 } 1699 if (h->type == CONF_NAK) 1700 (cp->parse_confnak)(sp, h, len); 1701 else /* CONF_REJ */ 1702 (cp->parse_confrej)(sp, h, len); 1703 1704 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rcn); 1705 break; 1706 1707 case TERM_REQ: 1708 sp->scp[cp->protoidx].rseq = h->ident; 1709 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rtr); 1710 break; 1711 case TERM_ACK: 1712 if (h->ident != sp->scp[cp->protoidx].confid && 1713 h->ident != sp->scp[cp->protoidx].seq) { 1714 if (debug) 1715 addlog("%s: %s id mismatch " 1716 "0x%x != 0x%x and 0x%x != %0lx\n", 1717 ifp->if_xname, cp->name, 1718 h->ident, sp->scp[cp->protoidx].confid, 1719 h->ident, sp->scp[cp->protoidx].seq); 1720 if_statinc(ifp, if_ierrors); 1721 break; 1722 } 1723 1724 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rta); 1725 break; 1726 case CODE_REJ: 1727 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1728 log(LOG_INFO, 1729 "%s: %s: ignoring RXJ (%s) for code ?, " 1730 "danger will robinson\n", 1731 ifp->if_xname, cp->name, 1732 sppp_cp_type_name(h->type)); 1733 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rxj); 1734 break; 1735 case PROTO_REJ: 1736 { 1737 int catastrophic; 1738 const struct cp *upper; 1739 int i; 1740 uint16_t proto; 1741 1742 catastrophic = 0; 1743 upper = NULL; 1744 proto = p[0] << 8 | p[1]; 1745 for (i = 0; i < IDX_COUNT; i++) { 1746 if (cps[i]->proto == proto) { 1747 upper = cps[i]; 1748 break; 1749 } 1750 } 1751 if (upper == NULL) 1752 catastrophic++; 1753 1754 if (debug) 1755 log(LOG_INFO, 1756 "%s: %s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1757 ifp->if_xname, cp->name, catastrophic ? '-' : '+', 1758 sppp_cp_type_name(h->type), proto, 1759 upper ? upper->name : "unknown", 1760 upper ? sppp_state_name(sp->scp[upper->protoidx].state) : "?"); 1761 1762 /* 1763 * if we got RXJ+ against conf-req, the peer does not implement 1764 * this particular protocol type. terminate the protocol. 1765 */ 1766 if (upper && !catastrophic) { 1767 if (sp->scp[upper->protoidx].state == STATE_REQ_SENT) { 1768 sppp_wq_add(sp->wq_cp, 1769 &sp->scp[upper->protoidx].work_close); 1770 break; 1771 } 1772 } 1773 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rxj); 1774 break; 1775 } 1776 case DISC_REQ: 1777 if (cp->proto != PPP_LCP) 1778 goto illegal; 1779 /* Discard the packet. */ 1780 break; 1781 case ECHO_REQ: 1782 if (cp->proto != PPP_LCP) 1783 goto illegal; 1784 if (sp->scp[cp->protoidx].state != STATE_OPENED) { 1785 if (debug) 1786 addlog("%s: lcp echo req but lcp closed\n", 1787 ifp->if_xname); 1788 if_statinc(ifp, if_ierrors); 1789 break; 1790 } 1791 if (len < 8) { 1792 if (debug) 1793 addlog("%s: invalid lcp echo request " 1794 "packet length: %d bytes\n", 1795 ifp->if_xname, len); 1796 break; 1797 } 1798 memcpy(&u32, h + 1, sizeof u32); 1799 if (ntohl(u32) == sp->lcp.magic) { 1800 /* Line loopback mode detected. */ 1801 printf("%s: loopback\n", ifp->if_xname); 1802 SPPP_UNLOCK(sp); 1803 if_down(ifp); 1804 SPPP_LOCK(sp, RW_WRITER); 1805 1806 IF_PURGE(&sp->pp_cpq); 1807 1808 /* Shut down the PPP link. */ 1809 /* XXX */ 1810 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_down); 1811 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_up); 1812 break; 1813 } 1814 u32 = htonl(sp->lcp.magic); 1815 memcpy(h + 1, &u32, sizeof u32); 1816 if (debug) 1817 addlog("%s: got lcp echo req, sending echo rep\n", 1818 ifp->if_xname); 1819 sppp_cp_send(sp, PPP_LCP, ECHO_REPLY, h->ident, len - 4, 1820 h + 1); 1821 break; 1822 case ECHO_REPLY: 1823 if (cp->proto != PPP_LCP) 1824 goto illegal; 1825 if (h->ident != sp->lcp.echoid) { 1826 if_statinc(ifp, if_ierrors); 1827 break; 1828 } 1829 if (len < 8) { 1830 if (debug) 1831 addlog("%s: lcp invalid echo reply " 1832 "packet length: %d bytes\n", 1833 ifp->if_xname, len); 1834 break; 1835 } 1836 if (debug) 1837 addlog("%s: lcp got echo rep\n", 1838 ifp->if_xname); 1839 memcpy(&u32, h + 1, sizeof u32); 1840 if (ntohl(u32) != sp->lcp.magic) 1841 sp->pp_alivecnt = 0; 1842 break; 1843 default: 1844 /* Unknown packet type -- send Code-Reject packet. */ 1845 illegal: 1846 if (debug) 1847 addlog("%s: %s send code-rej for 0x%x\n", 1848 ifp->if_xname, cp->name, h->type); 1849 sppp_cp_send(sp, cp->proto, CODE_REJ, 1850 ++sp->scp[cp->protoidx].seq, m->m_pkthdr.len, h); 1851 if_statinc(ifp, if_ierrors); 1852 } 1853 1854 SPPP_UNLOCK(sp); 1855 } 1856 1857 /* 1858 * The generic part of all Up/Down/Open/Close/TO event handlers. 1859 * Basically, the state transition handling in the automaton. 1860 */ 1861 static void 1862 sppp_up_event(struct sppp *sp, void *xcp) 1863 { 1864 const struct cp *cp = xcp; 1865 STDDCL; 1866 1867 KASSERT(SPPP_WLOCKED(sp)); 1868 1869 if ((cp->flags & CP_AUTH) != 0 && 1870 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1871 return; 1872 1873 if (debug) 1874 log(LOG_DEBUG, "%s: %s up(%s)\n", 1875 ifp->if_xname, cp->name, 1876 sppp_state_name(sp->scp[cp->protoidx].state)); 1877 1878 switch (sp->scp[cp->protoidx].state) { 1879 case STATE_INITIAL: 1880 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1881 break; 1882 case STATE_STARTING: 1883 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 1884 (cp->scr)(sp); 1885 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1886 break; 1887 default: 1888 printf("%s: %s illegal up in state %s\n", 1889 ifp->if_xname, cp->name, 1890 sppp_state_name(sp->scp[cp->protoidx].state)); 1891 } 1892 } 1893 1894 static void 1895 sppp_down_event(struct sppp *sp, void *xcp) 1896 { 1897 const struct cp *cp = xcp; 1898 STDDCL; 1899 1900 KASSERT(SPPP_WLOCKED(sp)); 1901 1902 if ((cp->flags & CP_AUTH) != 0 && 1903 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1904 return; 1905 1906 if (debug) 1907 log(LOG_DEBUG, "%s: %s down(%s)\n", 1908 ifp->if_xname, cp->name, 1909 sppp_state_name(sp->scp[cp->protoidx].state)); 1910 1911 switch (sp->scp[cp->protoidx].state) { 1912 case STATE_CLOSED: 1913 case STATE_CLOSING: 1914 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1915 break; 1916 case STATE_STOPPED: 1917 (cp->tls)(cp, sp); 1918 /* fall through */ 1919 case STATE_STOPPING: 1920 case STATE_REQ_SENT: 1921 case STATE_ACK_RCVD: 1922 case STATE_ACK_SENT: 1923 sppp_cp_change_state(cp, sp, STATE_STARTING); 1924 break; 1925 case STATE_OPENED: 1926 (cp->tld)(sp); 1927 sppp_cp_change_state(cp, sp, STATE_STARTING); 1928 break; 1929 default: 1930 printf("%s: %s illegal down in state %s\n", 1931 ifp->if_xname, cp->name, 1932 sppp_state_name(sp->scp[cp->protoidx].state)); 1933 } 1934 } 1935 1936 static void 1937 sppp_open_event(struct sppp *sp, void *xcp) 1938 { 1939 const struct cp *cp = xcp; 1940 STDDCL; 1941 1942 KASSERT(SPPP_WLOCKED(sp)); 1943 1944 if ((cp->flags & CP_AUTH) != 0 && 1945 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1946 return; 1947 1948 if (debug) 1949 log(LOG_DEBUG, "%s: %s open(%s)\n", 1950 ifp->if_xname, cp->name, 1951 sppp_state_name(sp->scp[cp->protoidx].state)); 1952 1953 switch (sp->scp[cp->protoidx].state) { 1954 case STATE_INITIAL: 1955 sppp_cp_change_state(cp, sp, STATE_STARTING); 1956 (cp->tls)(cp, sp); 1957 break; 1958 case STATE_STARTING: 1959 break; 1960 case STATE_CLOSED: 1961 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 1962 (cp->scr)(sp); 1963 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1964 break; 1965 case STATE_STOPPED: 1966 case STATE_STOPPING: 1967 case STATE_REQ_SENT: 1968 case STATE_ACK_RCVD: 1969 case STATE_ACK_SENT: 1970 case STATE_OPENED: 1971 break; 1972 case STATE_CLOSING: 1973 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1974 break; 1975 } 1976 } 1977 1978 static void 1979 sppp_close_event(struct sppp *sp, void *xcp) 1980 { 1981 const struct cp *cp = xcp; 1982 STDDCL; 1983 1984 KASSERT(SPPP_WLOCKED(sp)); 1985 1986 if ((cp->flags & CP_AUTH) != 0 && 1987 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1988 return; 1989 1990 if (debug) 1991 log(LOG_DEBUG, "%s: %s close(%s)\n", 1992 ifp->if_xname, cp->name, 1993 sppp_state_name(sp->scp[cp->protoidx].state)); 1994 1995 switch (sp->scp[cp->protoidx].state) { 1996 case STATE_INITIAL: 1997 case STATE_CLOSED: 1998 case STATE_CLOSING: 1999 break; 2000 case STATE_STARTING: 2001 sppp_cp_change_state(cp, sp, STATE_INITIAL); 2002 (cp->tlf)(cp, sp); 2003 break; 2004 case STATE_STOPPED: 2005 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2006 break; 2007 case STATE_STOPPING: 2008 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2009 break; 2010 case STATE_OPENED: 2011 (cp->tld)(sp); 2012 /* fall through */ 2013 case STATE_REQ_SENT: 2014 case STATE_ACK_RCVD: 2015 case STATE_ACK_SENT: 2016 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_terminate; 2017 if ((cp->flags & CP_AUTH) == 0) { 2018 sppp_cp_send(sp, cp->proto, TERM_REQ, 2019 ++sp->scp[cp->protoidx].seq, 0, 0); 2020 } 2021 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2022 break; 2023 } 2024 } 2025 2026 static void 2027 sppp_to_event(struct sppp *sp, void *xcp) 2028 { 2029 const struct cp *cp = xcp; 2030 int s; 2031 STDDCL; 2032 2033 KASSERT(SPPP_WLOCKED(sp)); 2034 2035 s = splnet(); 2036 2037 if (debug) 2038 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 2039 ifp->if_xname, cp->name, 2040 sppp_state_name(sp->scp[cp->protoidx].state), 2041 sp->scp[cp->protoidx].rst_counter); 2042 2043 if (--sp->scp[cp->protoidx].rst_counter < 0) 2044 /* TO- event */ 2045 switch (sp->scp[cp->protoidx].state) { 2046 case STATE_CLOSING: 2047 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2048 (cp->tlf)(cp, sp); 2049 break; 2050 case STATE_STOPPING: 2051 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2052 (cp->tlf)(cp, sp); 2053 break; 2054 case STATE_REQ_SENT: 2055 case STATE_ACK_RCVD: 2056 case STATE_ACK_SENT: 2057 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2058 (cp->tlf)(cp, sp); 2059 break; 2060 } 2061 else 2062 /* TO+ event */ 2063 switch (sp->scp[cp->protoidx].state) { 2064 case STATE_CLOSING: 2065 case STATE_STOPPING: 2066 if ((cp->flags & CP_AUTH) == 0) { 2067 sppp_cp_send(sp, cp->proto, TERM_REQ, 2068 ++sp->scp[cp->protoidx].seq, 0, 0); 2069 } 2070 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2071 break; 2072 case STATE_REQ_SENT: 2073 case STATE_ACK_RCVD: 2074 (cp->scr)(sp); 2075 /* sppp_cp_change_state() will restart the timer */ 2076 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2077 break; 2078 case STATE_ACK_SENT: 2079 (cp->scr)(sp); 2080 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2081 break; 2082 } 2083 2084 splx(s); 2085 } 2086 2087 static void 2088 sppp_rcr_event(struct sppp *sp, void *xcp) 2089 { 2090 const struct cp *cp = xcp; 2091 enum cp_rcr_type type; 2092 void *buf; 2093 size_t blen; 2094 STDDCL; 2095 2096 type = sp->scp[cp->protoidx].rcr_type; 2097 buf = sp->scp[cp->protoidx].rcr_buf; 2098 blen = sp->scp[cp->protoidx].rcr_blen; 2099 2100 if (type == CP_RCR_ACK) { 2101 /* RCR+ event */ 2102 switch (sp->scp[cp->protoidx].state) { 2103 case STATE_OPENED: 2104 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2105 cp->tld(sp); 2106 cp->scr(sp); 2107 cp->scan(cp, sp); 2108 break; 2109 case STATE_ACK_SENT: 2110 case STATE_REQ_SENT: 2111 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2112 cp->scan(cp, sp); 2113 break; 2114 case STATE_STOPPED: 2115 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2116 cp->scr(sp); 2117 cp->scan(cp, sp); 2118 break; 2119 case STATE_ACK_RCVD: 2120 sppp_cp_change_state(cp, sp, STATE_OPENED); 2121 if (debug) 2122 log(LOG_DEBUG, "%s: %s tlu\n", 2123 ifp->if_xname, 2124 cp->name); 2125 cp->tlu(sp); 2126 cp->scan(cp, sp); 2127 break; 2128 case STATE_CLOSING: 2129 case STATE_STOPPING: 2130 if (buf != NULL) { 2131 sp->scp[cp->protoidx].rcr_buf = NULL; 2132 sp->scp[cp->protoidx].rcr_blen = 0; 2133 kmem_free(buf, blen); 2134 } 2135 break; 2136 case STATE_CLOSED: 2137 if ((cp->flags & CP_AUTH) == 0) { 2138 sppp_cp_send(sp, cp->proto, TERM_ACK, 2139 sp->scp[cp->protoidx].rconfid, 0, 0); 2140 } 2141 break; 2142 default: 2143 printf("%s: %s illegal RCR+ in state %s\n", 2144 ifp->if_xname, cp->name, 2145 sppp_state_name(sp->scp[cp->protoidx].state)); 2146 if_statinc(ifp, if_ierrors); 2147 } 2148 } else { 2149 /* RCR- event */ 2150 switch (sp->scp[cp->protoidx].state) { 2151 case STATE_OPENED: 2152 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2153 cp->tld(sp); 2154 cp->scr(sp); 2155 cp->scan(cp, sp); 2156 break; 2157 case STATE_ACK_SENT: 2158 case STATE_REQ_SENT: 2159 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2160 cp->scan(cp, sp); 2161 break; 2162 case STATE_STOPPED: 2163 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2164 cp->scr(sp); 2165 cp->scan(cp, sp); 2166 break; 2167 case STATE_ACK_RCVD: 2168 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2169 cp->scan(cp, sp); 2170 break; 2171 case STATE_CLOSING: 2172 case STATE_STOPPING: 2173 if (buf != NULL) { 2174 sp->scp[cp->protoidx].rcr_buf = NULL; 2175 sp->scp[cp->protoidx].rcr_blen = 0; 2176 kmem_free(buf, blen); 2177 } 2178 break; 2179 case STATE_CLOSED: 2180 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2181 if ((cp->flags & CP_AUTH) == 0) { 2182 sppp_cp_send(sp, cp->proto, TERM_ACK, 2183 sp->scp[cp->protoidx].rconfid, 0, 0); 2184 } 2185 break; 2186 default: 2187 printf("%s: %s illegal RCR- in state %s\n", 2188 ifp->if_xname, cp->name, 2189 sppp_state_name(sp->scp[cp->protoidx].state)); 2190 if_statinc(ifp, if_ierrors); 2191 } 2192 } 2193 } 2194 2195 static void 2196 sppp_rca_event(struct sppp *sp, void *xcp) 2197 { 2198 const struct cp *cp = xcp; 2199 STDDCL; 2200 2201 switch (sp->scp[cp->protoidx].state) { 2202 case STATE_CLOSED: 2203 case STATE_STOPPED: 2204 if ((cp->flags & CP_AUTH) == 0) { 2205 sppp_cp_send(sp, cp->proto, TERM_ACK, 2206 sp->scp[cp->protoidx].rconfid, 0, 0); 2207 } 2208 break; 2209 case STATE_CLOSING: 2210 case STATE_STOPPING: 2211 break; 2212 case STATE_REQ_SENT: 2213 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2214 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2215 break; 2216 case STATE_OPENED: 2217 (cp->tld)(sp); 2218 /* fall through */ 2219 case STATE_ACK_RCVD: 2220 (cp->scr)(sp); 2221 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2222 break; 2223 case STATE_ACK_SENT: 2224 sppp_cp_change_state(cp, sp, STATE_OPENED); 2225 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2226 if (debug) 2227 log(LOG_DEBUG, "%s: %s tlu\n", 2228 ifp->if_xname, cp->name); 2229 (cp->tlu)(sp); 2230 break; 2231 default: 2232 printf("%s: %s illegal RCA in state %s\n", 2233 ifp->if_xname, cp->name, 2234 sppp_state_name(sp->scp[cp->protoidx].state)); 2235 if_statinc(ifp, if_ierrors); 2236 } 2237 } 2238 2239 static void 2240 sppp_rcn_event(struct sppp *sp, void *xcp) 2241 { 2242 const struct cp *cp = xcp; 2243 struct ifnet *ifp = &sp->pp_if; 2244 2245 switch (sp->scp[cp->protoidx].state) { 2246 case STATE_CLOSED: 2247 case STATE_STOPPED: 2248 if ((cp->flags & CP_AUTH) == 0) { 2249 sppp_cp_send(sp, cp->proto, TERM_ACK, 2250 sp->scp[cp->protoidx].rconfid, 0, 0); 2251 } 2252 break; 2253 case STATE_REQ_SENT: 2254 case STATE_ACK_SENT: 2255 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2256 (cp->scr)(sp); 2257 break; 2258 case STATE_OPENED: 2259 (cp->tld)(sp); 2260 /* fall through */ 2261 case STATE_ACK_RCVD: 2262 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2263 (cp->scr)(sp); 2264 break; 2265 case STATE_CLOSING: 2266 case STATE_STOPPING: 2267 break; 2268 default: 2269 printf("%s: %s illegal RCN in state %s\n", 2270 ifp->if_xname, cp->name, 2271 sppp_state_name(sp->scp[cp->protoidx].state)); 2272 if_statinc(ifp, if_ierrors); 2273 } 2274 } 2275 2276 static void 2277 sppp_rtr_event(struct sppp *sp, void *xcp) 2278 { 2279 const struct cp *cp = xcp; 2280 STDDCL; 2281 2282 switch (sp->scp[cp->protoidx].state) { 2283 case STATE_ACK_RCVD: 2284 case STATE_ACK_SENT: 2285 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2286 break; 2287 case STATE_CLOSED: 2288 case STATE_STOPPED: 2289 case STATE_CLOSING: 2290 case STATE_STOPPING: 2291 case STATE_REQ_SENT: 2292 break; 2293 case STATE_OPENED: 2294 (cp->tld)(sp); 2295 sp->scp[cp->protoidx].rst_counter = 0; 2296 sppp_cp_change_state(cp, sp, STATE_STOPPING); 2297 break; 2298 default: 2299 printf("%s: %s illegal RTR in state %s\n", 2300 ifp->if_xname, cp->name, 2301 sppp_state_name(sp->scp[cp->protoidx].state)); 2302 if_statinc(ifp, if_ierrors); 2303 return; 2304 } 2305 2306 /* Send Terminate-Ack packet. */ 2307 if (debug) 2308 log(LOG_DEBUG, "%s: %s send terminate-ack\n", 2309 ifp->if_xname, cp->name); 2310 if ((cp->flags & CP_AUTH) == 0) { 2311 sppp_cp_send(sp, cp->proto, TERM_ACK, 2312 sp->scp[cp->protoidx].rseq, 0, 0); 2313 } 2314 } 2315 2316 static void 2317 sppp_rta_event(struct sppp *sp, void *xcp) 2318 { 2319 const struct cp *cp = xcp; 2320 struct ifnet *ifp = &sp->pp_if; 2321 2322 switch (sp->scp[cp->protoidx].state) { 2323 case STATE_CLOSED: 2324 case STATE_STOPPED: 2325 case STATE_REQ_SENT: 2326 case STATE_ACK_SENT: 2327 break; 2328 case STATE_CLOSING: 2329 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2330 (cp->tlf)(cp, sp); 2331 break; 2332 case STATE_STOPPING: 2333 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2334 (cp->tlf)(cp, sp); 2335 break; 2336 case STATE_ACK_RCVD: 2337 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2338 break; 2339 case STATE_OPENED: 2340 (cp->tld)(sp); 2341 (cp->scr)(sp); 2342 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2343 break; 2344 default: 2345 printf("%s: %s illegal RTA in state %s\n", 2346 ifp->if_xname, cp->name, 2347 sppp_state_name(sp->scp[cp->protoidx].state)); 2348 if_statinc(ifp, if_ierrors); 2349 } 2350 } 2351 2352 static void 2353 sppp_rxj_event(struct sppp *sp, void *xcp) 2354 { 2355 const struct cp *cp = xcp; 2356 struct ifnet *ifp = &sp->pp_if; 2357 2358 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 2359 switch (sp->scp[cp->protoidx].state) { 2360 case STATE_CLOSED: 2361 case STATE_STOPPED: 2362 case STATE_REQ_SENT: 2363 case STATE_ACK_SENT: 2364 case STATE_CLOSING: 2365 case STATE_STOPPING: 2366 case STATE_OPENED: 2367 break; 2368 case STATE_ACK_RCVD: 2369 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2370 break; 2371 default: 2372 printf("%s: %s illegal RXJ- in state %s\n", 2373 ifp->if_xname, cp->name, 2374 sppp_state_name(sp->scp[cp->protoidx].state)); 2375 if_statinc(ifp, if_ierrors); 2376 } 2377 } 2378 2379 /* 2380 * Change the state of a control protocol in the state automaton. 2381 * Takes care of starting/stopping the restart timer. 2382 */ 2383 void 2384 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 2385 { 2386 2387 KASSERT(SPPP_WLOCKED(sp)); 2388 2389 sp->scp[cp->protoidx].state = newstate; 2390 callout_stop(&sp->scp[cp->protoidx].ch); 2391 switch (newstate) { 2392 case STATE_INITIAL: 2393 case STATE_STARTING: 2394 case STATE_CLOSED: 2395 case STATE_STOPPED: 2396 case STATE_OPENED: 2397 break; 2398 case STATE_CLOSING: 2399 case STATE_STOPPING: 2400 case STATE_REQ_SENT: 2401 case STATE_ACK_RCVD: 2402 case STATE_ACK_SENT: 2403 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2404 break; 2405 } 2406 } 2407 2408 /* 2409 *--------------------------------------------------------------------------* 2410 * * 2411 * The LCP implementation. * 2412 * * 2413 *--------------------------------------------------------------------------* 2414 */ 2415 static void 2416 sppp_lcp_init(struct sppp *sp) 2417 { 2418 2419 KASSERT(SPPP_WLOCKED(sp)); 2420 2421 sppp_cp_init(&lcp, sp); 2422 2423 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 2424 sp->lcp.magic = 0; 2425 sp->lcp.protos = 0; 2426 sp->lcp.max_terminate = 2; 2427 sp->lcp.max_configure = 10; 2428 sp->lcp.max_failure = 10; 2429 2430 /* 2431 * Initialize counters and timeout values. Note that we don't 2432 * use the 3 seconds suggested in RFC 1661 since we are likely 2433 * running on a fast link. XXX We should probably implement 2434 * the exponential backoff option. Note that these values are 2435 * relevant for all control protocols, not just LCP only. 2436 */ 2437 sp->lcp.timeout = 1 * hz; 2438 } 2439 2440 static void 2441 sppp_lcp_up(struct sppp *sp, void *xcp) 2442 { 2443 const struct cp *cp = xcp; 2444 int pidx; 2445 STDDCL; 2446 2447 KASSERT(SPPP_WLOCKED(sp)); 2448 2449 pidx = cp->protoidx; 2450 /* Initialize activity timestamp: opening a connection is an activity */ 2451 sp->pp_last_receive = sp->pp_last_activity = time_uptime; 2452 2453 /* 2454 * If this interface is passive or dial-on-demand, and we are 2455 * still in Initial state, it means we've got an incoming 2456 * call. Activate the interface. 2457 */ 2458 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2459 if (debug) 2460 log(LOG_DEBUG, 2461 "%s: Up event", ifp->if_xname); 2462 ifp->if_flags |= IFF_RUNNING; 2463 if (sp->scp[pidx].state == STATE_INITIAL) { 2464 if (debug) 2465 addlog("(incoming call)\n"); 2466 sp->pp_flags |= PP_CALLIN; 2467 sppp_wq_add(sp->wq_cp, &sp->scp[pidx].work_open); 2468 } else if (debug) 2469 addlog("\n"); 2470 } 2471 2472 sppp_up_event(sp, xcp); 2473 } 2474 2475 static void 2476 sppp_lcp_down(struct sppp *sp, void *xcp) 2477 { 2478 const struct cp *cp = xcp; 2479 int pidx; 2480 STDDCL; 2481 2482 KASSERT(SPPP_WLOCKED(sp)); 2483 2484 pidx = cp->protoidx; 2485 sppp_down_event(sp, xcp); 2486 2487 /* 2488 * If this is neither a dial-on-demand nor a passive 2489 * interface, simulate an ``ifconfig down'' action, so the 2490 * administrator can force a redial by another ``ifconfig 2491 * up''. XXX For leased line operation, should we immediately 2492 * try to reopen the connection here? 2493 */ 2494 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2495 if (debug) 2496 log(LOG_INFO, 2497 "%s: Down event (carrier loss), taking interface down.\n", 2498 ifp->if_xname); 2499 SPPP_UNLOCK(sp); 2500 if_down(ifp); 2501 SPPP_LOCK(sp, RW_WRITER); 2502 2503 if (sp->lcp.reestablish) 2504 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 2505 } else { 2506 if (debug) 2507 log(LOG_DEBUG, 2508 "%s: Down event (carrier loss)\n", 2509 ifp->if_xname); 2510 2511 sp->pp_flags &= ~PP_CALLIN; 2512 if (sp->scp[pidx].state != STATE_INITIAL) 2513 sppp_wq_add(sp->wq_cp, &sp->scp[pidx].work_close); 2514 ifp->if_flags &= ~IFF_RUNNING; 2515 } 2516 sp->scp[pidx].fail_counter = 0; 2517 } 2518 2519 static void 2520 sppp_lcp_open(struct sppp *sp, void *xcp) 2521 { 2522 2523 KASSERT(SPPP_WLOCKED(sp)); 2524 2525 sp->lcp.reestablish = false; 2526 2527 if (sp->pp_if.if_mtu < PP_MTU) { 2528 sp->lcp.mru = sp->pp_if.if_mtu; 2529 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2530 } else 2531 sp->lcp.mru = PP_MTU; 2532 sp->lcp.their_mru = PP_MTU; 2533 2534 /* 2535 * If we are authenticator, negotiate LCP_AUTH 2536 */ 2537 if (sp->hisauth.proto != 0) 2538 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2539 else 2540 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2541 sp->pp_flags &= ~PP_NEEDAUTH; 2542 sppp_open_event(sp, xcp); 2543 } 2544 2545 /* 2546 * Analyze a configure request. Return true if it was agreeable, and 2547 * caused action sca, false if it has been rejected or nak'ed, and 2548 * caused action scn. (The return value is used to make the state 2549 * transition decision in the state automaton.) 2550 */ 2551 static enum cp_rcr_type 2552 sppp_lcp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 2553 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 2554 { 2555 STDDCL; 2556 u_char *buf, *r, *p, l, blen; 2557 enum cp_rcr_type type; 2558 int len, rlen; 2559 uint32_t nmagic; 2560 u_short authproto; 2561 2562 KASSERT(SPPP_WLOCKED(sp)); 2563 2564 if (origlen < sizeof(*h)) 2565 return CP_RCR_DROP; 2566 2567 origlen -= sizeof(*h); 2568 type = CP_RCR_NONE; 2569 type = 0; 2570 2571 if (origlen <= 0) 2572 return CP_RCR_DROP; 2573 else 2574 blen = origlen; 2575 2576 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 2577 if (buf == NULL) 2578 return CP_RCR_DROP; 2579 2580 if (debug) 2581 log(LOG_DEBUG, "%s: lcp parse opts:", 2582 ifp->if_xname); 2583 2584 /* pass 1: check for things that need to be rejected */ 2585 p = (void *)(h + 1); 2586 r = buf; 2587 rlen = 0; 2588 for (len = origlen; len > 1; len-= l, p += l) { 2589 l = p[1]; 2590 if (l == 0) 2591 break; 2592 2593 /* Sanity check option length */ 2594 if (l > len) { 2595 /* 2596 * Malicious option - drop immediately. 2597 * XXX Maybe we should just RXJ it? 2598 */ 2599 addlog("%s: received malicious LCP option 0x%02x, " 2600 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp->if_xname, 2601 p[0], l, len); 2602 type = CP_RCR_ERR; 2603 goto end; 2604 } 2605 if (debug) 2606 addlog(" %s", sppp_lcp_opt_name(*p)); 2607 switch (p[0]) { 2608 case LCP_OPT_MAGIC: 2609 /* Magic number. */ 2610 /* fall through, both are same length */ 2611 case LCP_OPT_ASYNC_MAP: 2612 /* Async control character map. */ 2613 if (len >= 6 || l == 6) 2614 continue; 2615 if (debug) 2616 addlog(" [invalid]"); 2617 break; 2618 case LCP_OPT_MP_EID: 2619 if (len >= l && l >= 3) { 2620 switch (p[2]) { 2621 case 0: if (l==3+ 0) continue;break; 2622 case 2: if (l==3+ 4) continue;break; 2623 case 3: if (l==3+ 6) continue;break; 2624 case 6: if (l==3+16) continue;break; 2625 case 1: /* FALLTHROUGH */ 2626 case 4: if (l<=3+20) continue;break; 2627 case 5: if (l<=3+15) continue;break; 2628 /* XXX should it be default: continue;? */ 2629 } 2630 } 2631 if (debug) 2632 addlog(" [invalid class %d len %d]", p[2], l); 2633 break; 2634 case LCP_OPT_MP_SSNHF: 2635 if (len >= 2 && l == 2) { 2636 if (debug) 2637 addlog(" [rej]"); 2638 break; 2639 } 2640 if (debug) 2641 addlog(" [invalid]"); 2642 break; 2643 case LCP_OPT_MP_MRRU: 2644 /* Multilink maximum received reconstructed unit */ 2645 /* should be fall through, both are same length */ 2646 /* FALLTHROUGH */ 2647 case LCP_OPT_MRU: 2648 /* Maximum receive unit. */ 2649 if (len >= 4 && l == 4) 2650 continue; 2651 if (debug) 2652 addlog(" [invalid]"); 2653 break; 2654 case LCP_OPT_AUTH_PROTO: 2655 if (len < 4) { 2656 if (debug) 2657 addlog(" [invalid]"); 2658 break; 2659 } 2660 authproto = (p[2] << 8) + p[3]; 2661 if (authproto == PPP_CHAP && l != 5) { 2662 if (debug) 2663 addlog(" [invalid chap len]"); 2664 break; 2665 } 2666 if (sp->myauth.proto == 0) { 2667 /* we are not configured to do auth */ 2668 if (debug) 2669 addlog(" [not configured]"); 2670 break; 2671 } 2672 /* 2673 * Remote want us to authenticate, remember this, 2674 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2675 * up. 2676 */ 2677 sp->pp_flags |= PP_NEEDAUTH; 2678 continue; 2679 default: 2680 /* Others not supported. */ 2681 if (debug) 2682 addlog(" [rej]"); 2683 break; 2684 } 2685 if (rlen + l > blen) { 2686 if (debug) 2687 addlog(" [overflow]"); 2688 continue; 2689 } 2690 /* Add the option to rejected list. */ 2691 memcpy(r, p, l); 2692 r += l; 2693 rlen += l; 2694 } 2695 2696 if (rlen > 0) { 2697 type = CP_RCR_REJ; 2698 goto end; 2699 } 2700 2701 if (debug) 2702 addlog("\n"); 2703 2704 /* 2705 * pass 2: check for option values that are unacceptable and 2706 * thus require to be nak'ed. 2707 */ 2708 if (debug) 2709 log(LOG_DEBUG, "%s: lcp parse opt values: ", 2710 ifp->if_xname); 2711 2712 p = (void *)(h + 1); 2713 r = buf; 2714 rlen = 0; 2715 for (len = origlen; len > 0; len -= l, p += l) { 2716 l = p[1]; 2717 if (l == 0) 2718 break; 2719 2720 if (debug) 2721 addlog(" %s", sppp_lcp_opt_name(*p)); 2722 switch (p[0]) { 2723 case LCP_OPT_MAGIC: 2724 /* Magic number -- extract. */ 2725 nmagic = (uint32_t)p[2] << 24 | 2726 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2727 if (nmagic != sp->lcp.magic) { 2728 if (debug) 2729 addlog(" 0x%x", nmagic); 2730 continue; 2731 } 2732 /* 2733 * Local and remote magics equal -- loopback? 2734 */ 2735 if (sp->pp_loopcnt >= LOOPALIVECNT*5) { 2736 printf ("%s: loopback\n", 2737 ifp->if_xname); 2738 sp->pp_loopcnt = 0; 2739 if (ifp->if_flags & IFF_UP) { 2740 SPPP_UNLOCK(sp); 2741 if_down(ifp); 2742 SPPP_LOCK(sp, RW_WRITER); 2743 2744 IF_PURGE(&sp->pp_cpq); 2745 /* XXX ? */ 2746 sppp_wq_add(sp->wq_cp, 2747 &sp->scp[IDX_LCP].work_down); 2748 sppp_wq_add(sp->wq_cp, 2749 &sp->scp[IDX_LCP].work_up); 2750 } 2751 } else if (debug) 2752 addlog(" [glitch]"); 2753 ++sp->pp_loopcnt; 2754 /* 2755 * We negate our magic here, and NAK it. If 2756 * we see it later in an NAK packet, we 2757 * suggest a new one. 2758 */ 2759 nmagic = ~sp->lcp.magic; 2760 /* Gonna NAK it. */ 2761 p[2] = nmagic >> 24; 2762 p[3] = nmagic >> 16; 2763 p[4] = nmagic >> 8; 2764 p[5] = nmagic; 2765 break; 2766 2767 case LCP_OPT_ASYNC_MAP: 2768 /* 2769 * Async control character map -- just ignore it. 2770 * 2771 * Quote from RFC 1662, chapter 6: 2772 * To enable this functionality, synchronous PPP 2773 * implementations MUST always respond to the 2774 * Async-Control-Character-Map Configuration 2775 * Option with the LCP Configure-Ack. However, 2776 * acceptance of the Configuration Option does 2777 * not imply that the synchronous implementation 2778 * will do any ACCM mapping. Instead, all such 2779 * octet mapping will be performed by the 2780 * asynchronous-to-synchronous converter. 2781 */ 2782 continue; 2783 2784 case LCP_OPT_MRU: 2785 /* 2786 * Maximum receive unit. Always agreeable, 2787 * but ignored by now. 2788 */ 2789 sp->lcp.their_mru = p[2] * 256 + p[3]; 2790 if (debug) 2791 addlog(" %ld", sp->lcp.their_mru); 2792 continue; 2793 2794 case LCP_OPT_AUTH_PROTO: 2795 authproto = (p[2] << 8) + p[3]; 2796 if (sp->myauth.proto != authproto) { 2797 /* not agreed, nak */ 2798 if (debug) 2799 addlog(" [mine %s != his %s]", 2800 sppp_proto_name(sp->myauth.proto), 2801 sppp_proto_name(authproto)); 2802 p[2] = sp->myauth.proto >> 8; 2803 p[3] = sp->myauth.proto; 2804 break; 2805 } 2806 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2807 if (debug) 2808 addlog(" [chap not MD5]"); 2809 p[4] = CHAP_MD5; 2810 break; 2811 } 2812 continue; 2813 case LCP_OPT_MP_EID: 2814 /* 2815 * Endpoint identification. 2816 * Always agreeable, 2817 * but ignored by now. 2818 */ 2819 if (debug) { 2820 addlog(" type %d", p[2]); 2821 sppp_print_bytes(p+3, p[1]-3); 2822 } 2823 continue; 2824 case LCP_OPT_MP_MRRU: 2825 /* 2826 * Maximum received reconstructed unit. 2827 * Always agreeable, 2828 * but ignored by now. 2829 */ 2830 sp->lcp.their_mrru = p[2] * 256 + p[3]; 2831 if (debug) 2832 addlog(" %ld", sp->lcp.their_mrru); 2833 continue; 2834 } 2835 if (rlen + l > blen) { 2836 if (debug) 2837 addlog(" [overflow]"); 2838 continue; 2839 } 2840 /* Add the option to nak'ed list. */ 2841 memcpy(r, p, l); 2842 r += l; 2843 rlen += l; 2844 } 2845 2846 if (rlen > 0) { 2847 if (++sp->scp[IDX_LCP].fail_counter >= sp->lcp.max_failure) { 2848 if (debug) 2849 addlog(" max_failure (%d) exceeded, ", 2850 sp->lcp.max_failure); 2851 type = CP_RCR_REJ; 2852 } else { 2853 type = CP_RCR_NAK; 2854 } 2855 } else { 2856 type = CP_RCR_ACK; 2857 rlen = origlen; 2858 memcpy(r, h + 1, rlen); 2859 sp->scp[IDX_LCP].fail_counter = 0; 2860 sp->pp_loopcnt = 0; 2861 } 2862 2863 end: 2864 if (debug) 2865 addlog("\n"); 2866 2867 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 2868 if (buf != NULL) 2869 kmem_intr_free(buf, blen); 2870 } else { 2871 *msgbuf = buf; 2872 *buflen = blen; 2873 *msglen = rlen; 2874 } 2875 2876 return type; 2877 } 2878 2879 /* 2880 * Analyze the LCP Configure-Reject option list, and adjust our 2881 * negotiation. 2882 */ 2883 static void 2884 sppp_lcp_confrej(struct sppp *sp, struct lcp_header *h, int len) 2885 { 2886 STDDCL; 2887 u_char *p, l; 2888 2889 KASSERT(SPPP_WLOCKED(sp)); 2890 2891 if (len <= sizeof(*h)) 2892 return; 2893 2894 len -= sizeof(*h); 2895 2896 if (debug) 2897 log(LOG_DEBUG, "%s: lcp rej opts:", 2898 ifp->if_xname); 2899 2900 p = (void *)(h + 1); 2901 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2902 /* Sanity check option length */ 2903 if (l > len) { 2904 /* 2905 * Malicious option - drop immediately. 2906 * XXX Maybe we should just RXJ it? 2907 */ 2908 addlog("%s: received malicious LCP option, " 2909 "dropping.\n", ifp->if_xname); 2910 goto end; 2911 } 2912 if (debug) 2913 addlog(" %s", sppp_lcp_opt_name(*p)); 2914 switch (p[0]) { 2915 case LCP_OPT_MAGIC: 2916 /* Magic number -- can't use it, use 0 */ 2917 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2918 sp->lcp.magic = 0; 2919 break; 2920 case LCP_OPT_MRU: 2921 /* 2922 * We try to negotiate a lower MRU if the underlying 2923 * link's MTU is less than PP_MTU (e.g. PPPoE). If the 2924 * peer rejects this lower rate, fallback to the 2925 * default. 2926 */ 2927 if (debug) { 2928 addlog("%s: warning: peer rejected our MRU of " 2929 "%ld bytes. Defaulting to %d bytes\n", 2930 ifp->if_xname, sp->lcp.mru, PP_MTU); 2931 } 2932 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2933 sp->lcp.mru = PP_MTU; 2934 break; 2935 case LCP_OPT_AUTH_PROTO: 2936 /* 2937 * Peer doesn't want to authenticate himself, 2938 * deny unless this is a dialout call, and 2939 * SPPP_AUTHFLAG_NOCALLOUT is set. 2940 */ 2941 if ((sp->pp_flags & PP_CALLIN) == 0 && 2942 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2943 if (debug) 2944 addlog(" [don't insist on auth " 2945 "for callout]"); 2946 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2947 break; 2948 } 2949 if (debug) 2950 addlog("[access denied]\n"); 2951 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 2952 break; 2953 } 2954 } 2955 if (debug) 2956 addlog("\n"); 2957 end: 2958 return; 2959 } 2960 2961 /* 2962 * Analyze the LCP Configure-NAK option list, and adjust our 2963 * negotiation. 2964 */ 2965 static void 2966 sppp_lcp_confnak(struct sppp *sp, struct lcp_header *h, int len) 2967 { 2968 STDDCL; 2969 u_char *p, l; 2970 uint32_t magic; 2971 2972 KASSERT(SPPP_WLOCKED(sp)); 2973 2974 if (len <= sizeof(*h)) 2975 return; 2976 len -= sizeof(*h); 2977 2978 if (debug) 2979 log(LOG_DEBUG, "%s: lcp nak opts:", 2980 ifp->if_xname); 2981 2982 p = (void *)(h + 1); 2983 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2984 /* Sanity check option length */ 2985 if (l > len) { 2986 /* 2987 * Malicious option - drop immediately. 2988 * XXX Maybe we should just RXJ it? 2989 */ 2990 addlog("%s: received malicious LCP option, " 2991 "dropping.\n", ifp->if_xname); 2992 goto end; 2993 } 2994 if (debug) 2995 addlog(" %s", sppp_lcp_opt_name(*p)); 2996 switch (p[0]) { 2997 case LCP_OPT_MAGIC: 2998 /* Magic number -- renegotiate */ 2999 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 3000 len >= 6 && l == 6) { 3001 magic = (uint32_t)p[2] << 24 | 3002 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 3003 /* 3004 * If the remote magic is our negated one, 3005 * this looks like a loopback problem. 3006 * Suggest a new magic to make sure. 3007 */ 3008 if (magic == ~sp->lcp.magic) { 3009 if (debug) 3010 addlog(" magic glitch"); 3011 sp->lcp.magic = cprng_fast32(); 3012 } else { 3013 sp->lcp.magic = magic; 3014 if (debug) 3015 addlog(" %d", magic); 3016 } 3017 } 3018 break; 3019 case LCP_OPT_MRU: 3020 /* 3021 * Peer wants to advise us to negotiate an MRU. 3022 * Agree on it if it's reasonable, or use 3023 * default otherwise. 3024 */ 3025 if (len >= 4 && l == 4) { 3026 u_int mru = p[2] * 256 + p[3]; 3027 if (debug) 3028 addlog(" %d", mru); 3029 if (mru < PPP_MINMRU || mru > sp->pp_if.if_mtu) 3030 mru = sp->pp_if.if_mtu; 3031 sp->lcp.mru = mru; 3032 sp->lcp.opts |= (1 << LCP_OPT_MRU); 3033 } 3034 break; 3035 case LCP_OPT_AUTH_PROTO: 3036 /* 3037 * Peer doesn't like our authentication method, 3038 * deny. 3039 */ 3040 if (debug) 3041 addlog("[access denied]\n"); 3042 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3043 break; 3044 } 3045 } 3046 if (debug) 3047 addlog("\n"); 3048 end: 3049 return; 3050 } 3051 3052 static void 3053 sppp_lcp_tlu(struct sppp *sp) 3054 { 3055 struct ifnet *ifp = &sp->pp_if; 3056 int i; 3057 3058 KASSERT(SPPP_WLOCKED(sp)); 3059 3060 /* XXX ? */ 3061 if (! (ifp->if_flags & IFF_UP) && 3062 (ifp->if_flags & IFF_RUNNING)) { 3063 /* Coming out of loopback mode. */ 3064 SPPP_UNLOCK(sp); 3065 if_up(ifp); 3066 SPPP_LOCK(sp, RW_WRITER); 3067 } 3068 3069 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 3070 (sp->pp_flags & PP_NEEDAUTH) != 0) 3071 sppp_change_phase(sp, SPPP_PHASE_AUTHENTICATE); 3072 else 3073 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 3074 3075 /* 3076 * Open all authentication protocols. This is even required 3077 * if we already proceeded to network phase, since it might be 3078 * that remote wants us to authenticate, so we might have to 3079 * send a PAP request. Undesired authentication protocols 3080 * don't do anything when they get an Open event. 3081 */ 3082 for (i = 0; i < IDX_COUNT; i++) 3083 if ((cps[i])->flags & CP_AUTH) { 3084 sppp_wq_add(sp->wq_cp, 3085 &sp->scp[(cps[i])->protoidx].work_open); 3086 } 3087 3088 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 3089 /* Notify all NCPs. */ 3090 for (i = 0; i < IDX_COUNT; i++) 3091 if ((cps[i])->flags & CP_NCP) { 3092 sppp_wq_add(sp->wq_cp, 3093 &sp->scp[(cps[i])->protoidx].work_open); 3094 } 3095 } 3096 3097 /* notify low-level driver of state change */ 3098 sppp_notify_chg_wlocked(sp); 3099 } 3100 3101 static void 3102 sppp_lcp_tld(struct sppp *sp) 3103 { 3104 int i, pi, phase; 3105 3106 KASSERT(SPPP_WLOCKED(sp)); 3107 3108 phase = sp->pp_phase; 3109 3110 sppp_change_phase(sp, SPPP_PHASE_TERMINATE); 3111 3112 /* 3113 * Take upper layers down. We send the Down event first and 3114 * the Close second to prevent the upper layers from sending 3115 * ``a flurry of terminate-request packets'', as the RFC 3116 * describes it. 3117 */ 3118 for (i = 0; i < IDX_COUNT; i++) { 3119 pi = (cps[i])->protoidx; 3120 if (((cps[i])->flags & CP_LCP) == 0) { 3121 /* skip if ncp was not started */ 3122 if (phase != SPPP_PHASE_NETWORK && 3123 ((cps[i])->flags & CP_NCP) != 0) 3124 continue; 3125 3126 sppp_wq_add(sp->wq_cp, &sp->scp[pi].work_down); 3127 sppp_wq_add(sp->wq_cp, &sp->scp[pi].work_close); 3128 } 3129 } 3130 } 3131 3132 static void 3133 sppp_lcp_tls(const struct cp *cp __unused, struct sppp *sp) 3134 { 3135 3136 KASSERT(SPPP_WLOCKED(sp)); 3137 3138 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 3139 printf("%s: authentication failed %d times, not retrying again\n", 3140 sp->pp_if.if_xname, sp->pp_auth_failures); 3141 3142 SPPP_UNLOCK(sp); 3143 if_down(&sp->pp_if); 3144 SPPP_LOCK(sp, RW_WRITER); 3145 return; 3146 } 3147 3148 sppp_change_phase(sp, SPPP_PHASE_ESTABLISH); 3149 3150 /* Notify lower layer if desired. */ 3151 sppp_notify_tls_wlocked(sp); 3152 } 3153 3154 static void 3155 sppp_lcp_tlf(const struct cp *cp __unused, struct sppp *sp) 3156 { 3157 3158 KASSERT(SPPP_WLOCKED(sp)); 3159 3160 sppp_change_phase(sp, SPPP_PHASE_DEAD); 3161 3162 /* Notify lower layer if desired. */ 3163 sppp_notify_tlf_wlocked(sp); 3164 } 3165 3166 static void 3167 sppp_lcp_scr(struct sppp *sp) 3168 { 3169 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 3170 int i = 0; 3171 u_short authproto; 3172 3173 KASSERT(SPPP_WLOCKED(sp)); 3174 3175 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 3176 if (! sp->lcp.magic) 3177 sp->lcp.magic = cprng_fast32(); 3178 opt[i++] = LCP_OPT_MAGIC; 3179 opt[i++] = 6; 3180 opt[i++] = sp->lcp.magic >> 24; 3181 opt[i++] = sp->lcp.magic >> 16; 3182 opt[i++] = sp->lcp.magic >> 8; 3183 opt[i++] = sp->lcp.magic; 3184 } 3185 3186 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 3187 opt[i++] = LCP_OPT_MRU; 3188 opt[i++] = 4; 3189 opt[i++] = sp->lcp.mru >> 8; 3190 opt[i++] = sp->lcp.mru; 3191 } 3192 3193 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 3194 authproto = sp->hisauth.proto; 3195 opt[i++] = LCP_OPT_AUTH_PROTO; 3196 opt[i++] = authproto == PPP_CHAP? 5: 4; 3197 opt[i++] = authproto >> 8; 3198 opt[i++] = authproto; 3199 if (authproto == PPP_CHAP) 3200 opt[i++] = CHAP_MD5; 3201 } 3202 3203 sp->scp[IDX_LCP].confid = ++sp->scp[IDX_LCP].seq; 3204 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->scp[IDX_LCP].confid, i, &opt); 3205 } 3206 3207 /* 3208 * Check the open NCPs, return true if at least one NCP is open. 3209 */ 3210 3211 static int 3212 sppp_cp_check(struct sppp *sp, u_char cp_flags) 3213 { 3214 int i, mask; 3215 3216 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 3217 if ((sp->lcp.protos & mask) && (cps[i])->flags & cp_flags) 3218 return 1; 3219 return 0; 3220 } 3221 3222 /* 3223 * Re-check the open NCPs and see if we should terminate the link. 3224 * Called by the NCPs during their tlf action handling. 3225 */ 3226 static void 3227 sppp_lcp_check_and_close(struct sppp *sp) 3228 { 3229 3230 KASSERT(SPPP_WLOCKED(sp)); 3231 3232 if (sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 3233 /* don't bother, we are already going down */ 3234 return; 3235 } 3236 3237 if (sp->pp_phase == SPPP_PHASE_AUTHENTICATE && 3238 sppp_cp_check(sp, CP_AUTH)) 3239 return; 3240 3241 if (sp->pp_phase >= SPPP_PHASE_NETWORK && 3242 sppp_cp_check(sp, CP_NCP)) 3243 return; 3244 3245 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3246 } 3247 3248 /* 3249 *--------------------------------------------------------------------------* 3250 * * 3251 * The IPCP implementation. * 3252 * * 3253 *--------------------------------------------------------------------------* 3254 */ 3255 3256 static void 3257 sppp_ipcp_init(struct sppp *sp) 3258 { 3259 3260 KASSERT(SPPP_WLOCKED(sp)); 3261 3262 sppp_cp_init(&ipcp, sp); 3263 3264 sp->ipcp.opts = 0; 3265 sp->ipcp.flags = 0; 3266 } 3267 3268 static void 3269 sppp_ipcp_open(struct sppp *sp, void *xcp) 3270 { 3271 STDDCL; 3272 uint32_t myaddr, hisaddr; 3273 3274 KASSERT(SPPP_WLOCKED(sp)); 3275 3276 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 3277 sp->ipcp.req_myaddr = 0; 3278 sp->ipcp.req_hisaddr = 0; 3279 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 3280 3281 #ifdef INET 3282 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3283 #else 3284 myaddr = hisaddr = 0; 3285 #endif 3286 /* 3287 * If we don't have his address, this probably means our 3288 * interface doesn't want to talk IP at all. (This could 3289 * be the case if somebody wants to speak only IPX, for 3290 * example.) Don't open IPCP in this case. 3291 */ 3292 if (hisaddr == 0) { 3293 /* XXX this message should go away */ 3294 if (debug) 3295 log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n", 3296 ifp->if_xname); 3297 return; 3298 } 3299 3300 if (myaddr == 0) { 3301 /* 3302 * I don't have an assigned address, so i need to 3303 * negotiate my address. 3304 */ 3305 sp->ipcp.flags |= IPCP_MYADDR_DYN; 3306 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3307 } 3308 if (hisaddr == 1) { 3309 /* 3310 * XXX - remove this hack! 3311 * remote has no valid address, we need to get one assigned. 3312 */ 3313 sp->ipcp.flags |= IPCP_HISADDR_DYN; 3314 } 3315 sppp_open_event(sp, xcp); 3316 } 3317 3318 static void 3319 sppp_ipcp_close(struct sppp *sp, void *xcp) 3320 { 3321 3322 KASSERT(SPPP_WLOCKED(sp)); 3323 3324 sppp_close_event(sp, xcp); 3325 3326 #ifdef INET 3327 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 3328 /* 3329 * Some address was dynamic, clear it again. 3330 */ 3331 sppp_clear_ip_addrs(sp); 3332 #endif 3333 } 3334 3335 /* 3336 * Analyze a configure request. Return true if it was agreeable, and 3337 * caused action sca, false if it has been rejected or nak'ed, and 3338 * caused action scn. (The return value is used to make the state 3339 * transition decision in the state automaton.) 3340 */ 3341 static enum cp_rcr_type 3342 sppp_ipcp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 3343 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 3344 { 3345 u_char *buf, *r, *p, l, blen; 3346 enum cp_rcr_type type; 3347 struct ifnet *ifp = &sp->pp_if; 3348 int rlen, len, debug = ifp->if_flags & IFF_DEBUG; 3349 uint32_t hisaddr, desiredaddr; 3350 3351 KASSERT(SPPP_WLOCKED(sp)); 3352 3353 type = CP_RCR_NONE; 3354 origlen -= sizeof(*h); 3355 3356 if (origlen < 0) 3357 return CP_RCR_DROP; 3358 3359 /* 3360 * Make sure to allocate a buf that can at least hold a 3361 * conf-nak with an `address' option. We might need it below. 3362 */ 3363 blen = MAX(6, origlen); 3364 3365 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 3366 if (buf == NULL) 3367 return CP_RCR_DROP; 3368 3369 /* pass 1: see if we can recognize them */ 3370 if (debug) 3371 log(LOG_DEBUG, "%s: ipcp parse opts:", 3372 ifp->if_xname); 3373 p = (void *)(h + 1); 3374 r = buf; 3375 rlen = 0; 3376 for (len = origlen; len > 1; len -= l, p += l) { 3377 l = p[1]; 3378 if (l == 0) 3379 break; 3380 3381 /* Sanity check option length */ 3382 if (l > len) { 3383 /* XXX should we just RXJ? */ 3384 addlog("%s: malicious IPCP option received, dropping\n", 3385 ifp->if_xname); 3386 type = CP_RCR_ERR; 3387 goto end; 3388 } 3389 if (debug) 3390 addlog(" %s", sppp_ipcp_opt_name(*p)); 3391 switch (p[0]) { 3392 #ifdef notyet 3393 case IPCP_OPT_COMPRESSION: 3394 if (len >= 6 && l >= 6) { 3395 /* correctly formed compress option */ 3396 continue; 3397 } 3398 if (debug) 3399 addlog(" [invalid]"); 3400 break; 3401 #endif 3402 case IPCP_OPT_ADDRESS: 3403 if (len >= 6 && l == 6) { 3404 /* correctly formed address option */ 3405 continue; 3406 } 3407 if (debug) 3408 addlog(" [invalid]"); 3409 break; 3410 default: 3411 /* Others not supported. */ 3412 if (debug) 3413 addlog(" [rej]"); 3414 break; 3415 } 3416 /* Add the option to rejected list. */ 3417 if (rlen + l > blen) { 3418 if (debug) 3419 addlog(" [overflow]"); 3420 continue; 3421 } 3422 memcpy(r, p, l); 3423 r += l; 3424 rlen += l; 3425 } 3426 3427 if (rlen > 0) { 3428 type = CP_RCR_REJ; 3429 goto end; 3430 } 3431 3432 if (debug) 3433 addlog("\n"); 3434 3435 /* pass 2: parse option values */ 3436 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 3437 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 3438 else 3439 #ifdef INET 3440 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 3441 #else 3442 hisaddr = 0; 3443 #endif 3444 if (debug) 3445 log(LOG_DEBUG, "%s: ipcp parse opt values: ", 3446 ifp->if_xname); 3447 p = (void *)(h + 1); 3448 r = buf; 3449 rlen = 0; 3450 for (len = origlen; len > 1; len -= l, p += l) { 3451 l = p[1]; 3452 if (l == 0) 3453 break; 3454 3455 if (debug) 3456 addlog(" %s", sppp_ipcp_opt_name(*p)); 3457 switch (p[0]) { 3458 #ifdef notyet 3459 case IPCP_OPT_COMPRESSION: 3460 continue; 3461 #endif 3462 case IPCP_OPT_ADDRESS: 3463 desiredaddr = p[2] << 24 | p[3] << 16 | 3464 p[4] << 8 | p[5]; 3465 if (desiredaddr == hisaddr || 3466 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 3467 /* 3468 * Peer's address is same as our value, 3469 * this is agreeable. Gonna conf-ack 3470 * it. 3471 */ 3472 if (debug) 3473 addlog(" %s [ack]", 3474 sppp_dotted_quad(hisaddr)); 3475 /* record that we've seen it already */ 3476 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 3477 sp->ipcp.req_hisaddr = desiredaddr; 3478 hisaddr = desiredaddr; 3479 continue; 3480 } 3481 /* 3482 * The address wasn't agreeable. This is either 3483 * he sent us 0.0.0.0, asking to assign him an 3484 * address, or he send us another address not 3485 * matching our value. Either case, we gonna 3486 * conf-nak it with our value. 3487 */ 3488 if (debug) { 3489 if (desiredaddr == 0) 3490 addlog(" [addr requested]"); 3491 else 3492 addlog(" %s [not agreed]", 3493 sppp_dotted_quad(desiredaddr)); 3494 } 3495 3496 p[2] = hisaddr >> 24; 3497 p[3] = hisaddr >> 16; 3498 p[4] = hisaddr >> 8; 3499 p[5] = hisaddr; 3500 break; 3501 } 3502 if (rlen + l > blen) { 3503 if (debug) 3504 addlog(" [overflow]"); 3505 continue; 3506 } 3507 /* Add the option to nak'ed list. */ 3508 memcpy(r, p, l); 3509 r += l; 3510 rlen += l; 3511 } 3512 3513 if (rlen > 0) { 3514 type = CP_RCR_NAK; 3515 } else { 3516 if ((sp->ipcp.flags & IPCP_HISADDR_SEEN) == 0) { 3517 /* 3518 * If we are about to conf-ack the request, but haven't seen 3519 * his address so far, gonna conf-nak it instead, with the 3520 * `address' option present and our idea of his address being 3521 * filled in there, to request negotiation of both addresses. 3522 * 3523 * XXX This can result in an endless req - nak loop if peer 3524 * doesn't want to send us his address. Q: What should we do 3525 * about it? XXX A: implement the max-failure counter. 3526 */ 3527 buf[0] = IPCP_OPT_ADDRESS; 3528 buf[1] = 6; 3529 buf[2] = hisaddr >> 24; 3530 buf[3] = hisaddr >> 16; 3531 buf[4] = hisaddr >> 8; 3532 buf[5] = hisaddr; 3533 rlen = 6; 3534 if (debug) 3535 addlog(" still need hisaddr"); 3536 type = CP_RCR_NAK; 3537 } else { 3538 type = CP_RCR_ACK; 3539 rlen = origlen; 3540 memcpy(r, h + 1, rlen); 3541 } 3542 } 3543 3544 end: 3545 if (debug) 3546 addlog("\n"); 3547 3548 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 3549 if (buf != NULL) 3550 kmem_intr_free(buf, blen); 3551 } else { 3552 *msgbuf = buf; 3553 *buflen = blen; 3554 *msglen = rlen; 3555 } 3556 3557 return type; 3558 } 3559 3560 /* 3561 * Analyze the IPCP Configure-Reject option list, and adjust our 3562 * negotiation. 3563 */ 3564 static void 3565 sppp_ipcp_confrej(struct sppp *sp, struct lcp_header *h, int len) 3566 { 3567 u_char *p, l; 3568 struct ifnet *ifp = &sp->pp_if; 3569 int debug = ifp->if_flags & IFF_DEBUG; 3570 3571 KASSERT(SPPP_WLOCKED(sp)); 3572 3573 if (len <= sizeof(*h)) 3574 return; 3575 3576 len -= sizeof(*h); 3577 3578 if (debug) 3579 log(LOG_DEBUG, "%s: ipcp rej opts:", 3580 ifp->if_xname); 3581 3582 p = (void *)(h + 1); 3583 for (; len > 1; len -= l, p += l) { 3584 l = p[1]; 3585 if (l == 0) 3586 break; 3587 3588 /* Sanity check option length */ 3589 if (l > len) { 3590 /* XXX should we just RXJ? */ 3591 addlog("%s: malicious IPCP option received, dropping\n", 3592 ifp->if_xname); 3593 goto end; 3594 } 3595 if (debug) 3596 addlog(" %s", sppp_ipcp_opt_name(*p)); 3597 switch (p[0]) { 3598 case IPCP_OPT_ADDRESS: 3599 /* 3600 * Peer doesn't grok address option. This is 3601 * bad. XXX Should we better give up here? 3602 */ 3603 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 3604 break; 3605 #ifdef notyet 3606 case IPCP_OPT_COMPRESS: 3607 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 3608 break; 3609 #endif 3610 } 3611 } 3612 if (debug) 3613 addlog("\n"); 3614 end: 3615 return; 3616 } 3617 3618 /* 3619 * Analyze the IPCP Configure-NAK option list, and adjust our 3620 * negotiation. 3621 */ 3622 static void 3623 sppp_ipcp_confnak(struct sppp *sp, struct lcp_header *h, int len) 3624 { 3625 u_char *p, l; 3626 struct ifnet *ifp = &sp->pp_if; 3627 int debug = ifp->if_flags & IFF_DEBUG; 3628 uint32_t wantaddr; 3629 3630 KASSERT(SPPP_WLOCKED(sp)); 3631 3632 len -= sizeof(*h); 3633 3634 if (debug) 3635 log(LOG_DEBUG, "%s: ipcp nak opts:", 3636 ifp->if_xname); 3637 3638 p = (void *)(h + 1); 3639 for (; len > 1; len -= l, p += l) { 3640 l = p[1]; 3641 if (l == 0) 3642 break; 3643 3644 /* Sanity check option length */ 3645 if (l > len) { 3646 /* XXX should we just RXJ? */ 3647 addlog("%s: malicious IPCP option received, dropping\n", 3648 ifp->if_xname); 3649 return; 3650 } 3651 if (debug) 3652 addlog(" %s", sppp_ipcp_opt_name(*p)); 3653 switch (*p) { 3654 case IPCP_OPT_ADDRESS: 3655 /* 3656 * Peer doesn't like our local IP address. See 3657 * if we can do something for him. We'll drop 3658 * him our address then. 3659 */ 3660 if (len >= 6 && l == 6) { 3661 wantaddr = p[2] << 24 | p[3] << 16 | 3662 p[4] << 8 | p[5]; 3663 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3664 if (debug) 3665 addlog(" [wantaddr %s]", 3666 sppp_dotted_quad(wantaddr)); 3667 /* 3668 * When doing dynamic address assignment, 3669 * we accept his offer. Otherwise, we 3670 * ignore it and thus continue to negotiate 3671 * our already existing value. 3672 */ 3673 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3674 if (debug) 3675 addlog(" [agree]"); 3676 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3677 sp->ipcp.req_myaddr = wantaddr; 3678 } 3679 } 3680 break; 3681 3682 case IPCP_OPT_PRIMDNS: 3683 if (len >= 6 && l == 6) { 3684 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3685 p[4] << 8 | p[5]; 3686 } 3687 break; 3688 3689 case IPCP_OPT_SECDNS: 3690 if (len >= 6 && l == 6) { 3691 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3692 p[4] << 8 | p[5]; 3693 } 3694 break; 3695 #ifdef notyet 3696 case IPCP_OPT_COMPRESS: 3697 /* 3698 * Peer wants different compression parameters. 3699 */ 3700 break; 3701 #endif 3702 } 3703 } 3704 if (debug) 3705 addlog("\n"); 3706 } 3707 3708 static void 3709 sppp_ipcp_tlu(struct sppp *sp) 3710 { 3711 #ifdef INET 3712 KASSERT(SPPP_WLOCKED(sp)); 3713 /* we are up. Set addresses and notify anyone interested */ 3714 sppp_set_ip_addrs(sp); 3715 #endif 3716 } 3717 3718 static void 3719 sppp_ipcp_scr(struct sppp *sp) 3720 { 3721 uint8_t opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3722 #ifdef INET 3723 uint32_t ouraddr; 3724 #endif 3725 int i = 0; 3726 3727 KASSERT(SPPP_WLOCKED(sp)); 3728 3729 #ifdef notyet 3730 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3731 opt[i++] = IPCP_OPT_COMPRESSION; 3732 opt[i++] = 6; 3733 opt[i++] = 0; /* VJ header compression */ 3734 opt[i++] = 0x2d; /* VJ header compression */ 3735 opt[i++] = max_slot_id; 3736 opt[i++] = comp_slot_id; 3737 } 3738 #endif 3739 3740 #ifdef INET 3741 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3742 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3743 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3744 else 3745 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3746 opt[i++] = IPCP_OPT_ADDRESS; 3747 opt[i++] = 6; 3748 opt[i++] = ouraddr >> 24; 3749 opt[i++] = ouraddr >> 16; 3750 opt[i++] = ouraddr >> 8; 3751 opt[i++] = ouraddr; 3752 } 3753 #endif 3754 3755 if (sp->query_dns & 1) { 3756 opt[i++] = IPCP_OPT_PRIMDNS; 3757 opt[i++] = 6; 3758 opt[i++] = sp->dns_addrs[0] >> 24; 3759 opt[i++] = sp->dns_addrs[0] >> 16; 3760 opt[i++] = sp->dns_addrs[0] >> 8; 3761 opt[i++] = sp->dns_addrs[0]; 3762 } 3763 if (sp->query_dns & 2) { 3764 opt[i++] = IPCP_OPT_SECDNS; 3765 opt[i++] = 6; 3766 opt[i++] = sp->dns_addrs[1] >> 24; 3767 opt[i++] = sp->dns_addrs[1] >> 16; 3768 opt[i++] = sp->dns_addrs[1] >> 8; 3769 opt[i++] = sp->dns_addrs[1]; 3770 } 3771 3772 sp->scp[IDX_IPCP].confid = ++sp->scp[IDX_IPCP].seq; 3773 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->scp[IDX_IPCP].confid, i, &opt); 3774 } 3775 3776 /* 3777 *--------------------------------------------------------------------------* 3778 * * 3779 * The IPv6CP implementation. * 3780 * * 3781 *--------------------------------------------------------------------------* 3782 */ 3783 3784 #ifdef INET6 3785 static void 3786 sppp_ipv6cp_init(struct sppp *sp) 3787 { 3788 3789 KASSERT(SPPP_WLOCKED(sp)); 3790 3791 sppp_cp_init(&ipv6cp, sp); 3792 3793 sp->ipv6cp.opts = 0; 3794 sp->ipv6cp.flags = 0; 3795 } 3796 3797 static void 3798 sppp_ipv6cp_open(struct sppp *sp, void *xcp) 3799 { 3800 STDDCL; 3801 struct in6_addr myaddr, hisaddr; 3802 3803 KASSERT(SPPP_WLOCKED(sp)); 3804 3805 #ifdef IPV6CP_MYIFID_DYN 3806 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3807 #else 3808 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3809 #endif 3810 3811 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3812 /* 3813 * If we don't have our address, this probably means our 3814 * interface doesn't want to talk IPv6 at all. (This could 3815 * be the case if somebody wants to speak only IPX, for 3816 * example.) Don't open IPv6CP in this case. 3817 */ 3818 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3819 /* XXX this message should go away */ 3820 if (debug) 3821 log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n", 3822 ifp->if_xname); 3823 return; 3824 } 3825 3826 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3827 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3828 sppp_open_event(sp, xcp); 3829 } 3830 3831 /* 3832 * Analyze a configure request. Return true if it was agreeable, and 3833 * caused action sca, false if it has been rejected or nak'ed, and 3834 * caused action scn. (The return value is used to make the state 3835 * transition decision in the state automaton.) 3836 */ 3837 static enum cp_rcr_type 3838 sppp_ipv6cp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 3839 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 3840 { 3841 u_char *buf, *r, *p, l, blen; 3842 struct ifnet *ifp = &sp->pp_if; 3843 int rlen, len, debug = ifp->if_flags & IFF_DEBUG; 3844 struct in6_addr myaddr, desiredaddr, suggestaddr; 3845 enum cp_rcr_type type; 3846 int ifidcount; 3847 int collision, nohisaddr; 3848 char ip6buf[INET6_ADDRSTRLEN]; 3849 3850 KASSERT(SPPP_WLOCKED(sp)); 3851 3852 type = CP_RCR_NONE; 3853 origlen -= sizeof(*h); 3854 3855 if (origlen < 0) 3856 return CP_RCR_DROP; 3857 3858 /* 3859 * Make sure to allocate a buf that can at least hold a 3860 * conf-nak with an `address' option. We might need it below. 3861 */ 3862 blen = MAX(6, origlen); 3863 3864 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 3865 if (buf == NULL) 3866 return CP_RCR_DROP; 3867 3868 /* pass 1: see if we can recognize them */ 3869 if (debug) 3870 log(LOG_DEBUG, "%s: ipv6cp parse opts:", 3871 ifp->if_xname); 3872 p = (void *)(h + 1); 3873 r = buf; 3874 rlen = 0; 3875 ifidcount = 0; 3876 for (len = origlen; len > 1; len -= l, p += l) { 3877 l = p[1]; 3878 if (l == 0) 3879 break; 3880 3881 /* Sanity check option length */ 3882 if (l > len) { 3883 /* XXX just RXJ? */ 3884 addlog("%s: received malicious IPCPv6 option, " 3885 "dropping\n", ifp->if_xname); 3886 type = CP_RCR_ERR; 3887 goto end; 3888 } 3889 if (debug) 3890 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3891 switch (p[0]) { 3892 case IPV6CP_OPT_IFID: 3893 if (len >= 10 && l == 10 && ifidcount == 0) { 3894 /* correctly formed address option */ 3895 ifidcount++; 3896 continue; 3897 } 3898 if (debug) 3899 addlog(" [invalid]"); 3900 break; 3901 #ifdef notyet 3902 case IPV6CP_OPT_COMPRESSION: 3903 if (len >= 4 && l >= 4) { 3904 /* correctly formed compress option */ 3905 continue; 3906 } 3907 if (debug) 3908 addlog(" [invalid]"); 3909 break; 3910 #endif 3911 default: 3912 /* Others not supported. */ 3913 if (debug) 3914 addlog(" [rej]"); 3915 break; 3916 } 3917 if (rlen + l > blen) { 3918 if (debug) 3919 addlog(" [overflow]"); 3920 continue; 3921 } 3922 /* Add the option to rejected list. */ 3923 memcpy(r, p, l); 3924 r += l; 3925 rlen += l; 3926 } 3927 3928 if (rlen > 0) { 3929 type = CP_RCR_REJ; 3930 goto end; 3931 } 3932 3933 if (debug) 3934 addlog("\n"); 3935 3936 /* pass 2: parse option values */ 3937 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3938 if (debug) 3939 log(LOG_DEBUG, "%s: ipv6cp parse opt values: ", 3940 ifp->if_xname); 3941 p = (void *)(h + 1); 3942 r = buf; 3943 rlen = 0; 3944 type = CP_RCR_ACK; 3945 for (len = origlen; len > 1; len -= l, p += l) { 3946 l = p[1]; 3947 if (l == 0) 3948 break; 3949 3950 if (debug) 3951 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3952 switch (p[0]) { 3953 #ifdef notyet 3954 case IPV6CP_OPT_COMPRESSION: 3955 continue; 3956 #endif 3957 case IPV6CP_OPT_IFID: 3958 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3959 memcpy(&desiredaddr.s6_addr[8], &p[2], 8); 3960 collision = (memcmp(&desiredaddr.s6_addr[8], 3961 &myaddr.s6_addr[8], 8) == 0); 3962 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3963 3964 desiredaddr.s6_addr16[0] = htons(0xfe80); 3965 (void)in6_setscope(&desiredaddr, &sp->pp_if, NULL); 3966 3967 if (!collision && !nohisaddr) { 3968 /* no collision, hisaddr known - Conf-Ack */ 3969 type = CP_RCR_ACK; 3970 3971 if (debug) { 3972 addlog(" %s [%s]", 3973 IN6_PRINT(ip6buf, &desiredaddr), 3974 sppp_cp_type_name(CONF_ACK)); 3975 } 3976 continue; 3977 } 3978 3979 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3980 if (collision && nohisaddr) { 3981 /* collision, hisaddr unknown - Conf-Rej */ 3982 type = CP_RCR_REJ; 3983 memset(&p[2], 0, 8); 3984 } else { 3985 /* 3986 * - no collision, hisaddr unknown, or 3987 * - collision, hisaddr known 3988 * Conf-Nak, suggest hisaddr 3989 */ 3990 type = CP_RCR_NAK; 3991 sppp_suggest_ip6_addr(sp, &suggestaddr); 3992 memcpy(&p[2], &suggestaddr.s6_addr[8], 8); 3993 } 3994 if (debug) { 3995 int ctype = type == CP_RCR_REJ ? CONF_REJ : CONF_NAK; 3996 addlog(" %s [%s]", IN6_PRINT(ip6buf, &desiredaddr), 3997 sppp_cp_type_name(ctype)); 3998 } 3999 break; 4000 } 4001 if (rlen + l > blen) { 4002 if (debug) 4003 addlog(" [overflow]"); 4004 continue; 4005 } 4006 /* Add the option to nak'ed list. */ 4007 memcpy(r, p, l); 4008 r += l; 4009 rlen += l; 4010 } 4011 4012 if (rlen > 0) { 4013 if (type != CP_RCR_ACK) { 4014 if (debug) { 4015 int ctype ; 4016 ctype = type == CP_RCR_REJ ? 4017 CONF_REJ : CONF_NAK; 4018 addlog(" send %s suggest %s\n", 4019 sppp_cp_type_name(ctype), 4020 IN6_PRINT(ip6buf, &suggestaddr)); 4021 } 4022 } 4023 #ifdef notdef 4024 if (type == CP_RCR_ACK) 4025 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 4026 #endif 4027 } else { 4028 if (type == CP_RCR_ACK) { 4029 rlen = origlen; 4030 memcpy(r, h + 1, rlen); 4031 } 4032 } 4033 end: 4034 if (debug) 4035 addlog("\n"); 4036 4037 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 4038 if (buf != NULL) 4039 kmem_intr_free(buf, blen); 4040 } else { 4041 *msgbuf = buf; 4042 *buflen = blen; 4043 *msglen = rlen; 4044 } 4045 4046 return type; 4047 } 4048 4049 /* 4050 * Analyze the IPv6CP Configure-Reject option list, and adjust our 4051 * negotiation. 4052 */ 4053 static void 4054 sppp_ipv6cp_confrej(struct sppp *sp, struct lcp_header *h, int len) 4055 { 4056 u_char *p, l; 4057 struct ifnet *ifp = &sp->pp_if; 4058 int debug = ifp->if_flags & IFF_DEBUG; 4059 4060 KASSERT(SPPP_WLOCKED(sp)); 4061 4062 if (len <= sizeof(*h)) 4063 return; 4064 4065 len -= sizeof(*h); 4066 4067 if (debug) 4068 log(LOG_DEBUG, "%s: ipv6cp rej opts:", 4069 ifp->if_xname); 4070 4071 p = (void *)(h + 1); 4072 for (; len > 1; len -= l, p += l) { 4073 l = p[1]; 4074 if (l == 0) 4075 break; 4076 4077 if (l > len) { 4078 /* XXX just RXJ? */ 4079 addlog("%s: received malicious IPCPv6 option, " 4080 "dropping\n", ifp->if_xname); 4081 goto end; 4082 } 4083 if (debug) 4084 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4085 switch (p[0]) { 4086 case IPV6CP_OPT_IFID: 4087 /* 4088 * Peer doesn't grok address option. This is 4089 * bad. XXX Should we better give up here? 4090 */ 4091 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 4092 break; 4093 #ifdef notyet 4094 case IPV6CP_OPT_COMPRESS: 4095 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 4096 break; 4097 #endif 4098 } 4099 } 4100 if (debug) 4101 addlog("\n"); 4102 end: 4103 return; 4104 } 4105 4106 /* 4107 * Analyze the IPv6CP Configure-NAK option list, and adjust our 4108 * negotiation. 4109 */ 4110 static void 4111 sppp_ipv6cp_confnak(struct sppp *sp, struct lcp_header *h, int len) 4112 { 4113 u_char *p, l; 4114 struct ifnet *ifp = &sp->pp_if; 4115 int debug = ifp->if_flags & IFF_DEBUG; 4116 struct in6_addr suggestaddr; 4117 char ip6buf[INET6_ADDRSTRLEN]; 4118 4119 KASSERT(SPPP_WLOCKED(sp)); 4120 4121 if (len <= sizeof(*h)) 4122 return; 4123 4124 len -= sizeof(*h); 4125 4126 if (debug) 4127 log(LOG_DEBUG, "%s: ipv6cp nak opts:", 4128 ifp->if_xname); 4129 4130 p = (void *)(h + 1); 4131 for (; len > 1; len -= l, p += l) { 4132 l = p[1]; 4133 if (l == 0) 4134 break; 4135 4136 if (l > len) { 4137 /* XXX just RXJ? */ 4138 addlog("%s: received malicious IPCPv6 option, " 4139 "dropping\n", ifp->if_xname); 4140 goto end; 4141 } 4142 if (debug) 4143 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4144 switch (p[0]) { 4145 case IPV6CP_OPT_IFID: 4146 /* 4147 * Peer doesn't like our local ifid. See 4148 * if we can do something for him. We'll drop 4149 * him our address then. 4150 */ 4151 if (len < 10 || l != 10) 4152 break; 4153 memset(&suggestaddr, 0, sizeof(suggestaddr)); 4154 suggestaddr.s6_addr16[0] = htons(0xfe80); 4155 (void)in6_setscope(&suggestaddr, &sp->pp_if, NULL); 4156 memcpy(&suggestaddr.s6_addr[8], &p[2], 8); 4157 4158 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 4159 if (debug) 4160 addlog(" [suggestaddr %s]", 4161 IN6_PRINT(ip6buf, &suggestaddr)); 4162 #ifdef IPV6CP_MYIFID_DYN 4163 /* 4164 * When doing dynamic address assignment, 4165 * we accept his offer. 4166 */ 4167 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 4168 struct in6_addr lastsuggest; 4169 /* 4170 * If <suggested myaddr from peer> equals to 4171 * <hisaddr we have suggested last time>, 4172 * we have a collision. generate new random 4173 * ifid. 4174 */ 4175 sppp_suggest_ip6_addr(&lastsuggest); 4176 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 4177 lastsuggest)) { 4178 if (debug) 4179 addlog(" [random]"); 4180 sppp_gen_ip6_addr(sp, &suggestaddr); 4181 } 4182 sppp_set_ip6_addr(sp, &suggestaddr, 0); 4183 if (debug) 4184 addlog(" [agree]"); 4185 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 4186 } 4187 #else 4188 /* 4189 * Since we do not do dynamic address assignment, 4190 * we ignore it and thus continue to negotiate 4191 * our already existing value. This can possibly 4192 * go into infinite request-reject loop. 4193 * 4194 * This is not likely because we normally use 4195 * ifid based on MAC-address. 4196 * If you have no ethernet card on the node, too bad. 4197 * XXX should we use fail_counter? 4198 */ 4199 #endif 4200 break; 4201 #ifdef notyet 4202 case IPV6CP_OPT_COMPRESS: 4203 /* 4204 * Peer wants different compression parameters. 4205 */ 4206 break; 4207 #endif 4208 } 4209 } 4210 if (debug) 4211 addlog("\n"); 4212 end: 4213 return; 4214 } 4215 4216 static void 4217 sppp_ipv6cp_tlu(struct sppp *sp) 4218 { 4219 4220 KASSERT(SPPP_WLOCKED(sp)); 4221 /* we are up - notify isdn daemon */ 4222 sppp_notify_con_wlocked(sp); 4223 } 4224 4225 static void 4226 sppp_ipv6cp_scr(struct sppp *sp) 4227 { 4228 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 4229 struct in6_addr ouraddr; 4230 int i = 0; 4231 4232 KASSERT(SPPP_WLOCKED(sp)); 4233 4234 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 4235 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 4236 opt[i++] = IPV6CP_OPT_IFID; 4237 opt[i++] = 10; 4238 memcpy(&opt[i], &ouraddr.s6_addr[8], 8); 4239 i += 8; 4240 } 4241 4242 #ifdef notyet 4243 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 4244 opt[i++] = IPV6CP_OPT_COMPRESSION; 4245 opt[i++] = 4; 4246 opt[i++] = 0; /* TBD */ 4247 opt[i++] = 0; /* TBD */ 4248 /* variable length data may follow */ 4249 } 4250 #endif 4251 4252 sp->scp[IDX_IPV6CP].confid = ++sp->scp[IDX_IPV6CP].seq; 4253 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->scp[IDX_IPV6CP].confid, i, &opt); 4254 } 4255 #else /*INET6*/ 4256 static void 4257 sppp_ipv6cp_init(struct sppp *sp) 4258 { 4259 4260 KASSERT(SPPP_WLOCKED(sp)); 4261 } 4262 4263 static void 4264 sppp_ipv6cp_open(struct sppp *sp, void *xcp) 4265 { 4266 4267 KASSERT(SPPP_WLOCKED(sp)); 4268 } 4269 4270 static enum cp_rcr_type 4271 sppp_ipv6cp_confreq(struct sppp *sp, struct lcp_header *h, 4272 int len, uint8_t **msgbuf, size_t *buflen, size_t *msglen) 4273 { 4274 4275 KASSERT(SPPP_WLOCKED(sp)); 4276 return 0; 4277 } 4278 4279 static void 4280 sppp_ipv6cp_confrej(struct sppp *sp, struct lcp_header *h, 4281 int len) 4282 { 4283 4284 KASSERT(SPPP_WLOCKED(sp)); 4285 } 4286 4287 static void 4288 sppp_ipv6cp_confnak(struct sppp *sp, struct lcp_header *h, 4289 int len) 4290 { 4291 4292 KASSERT(SPPP_WLOCKED(sp)); 4293 } 4294 4295 static void 4296 sppp_ipv6cp_tlu(struct sppp *sp) 4297 { 4298 4299 KASSERT(SPPP_WLOCKED(sp)); 4300 } 4301 4302 static void 4303 sppp_ipv6cp_scr(struct sppp *sp) 4304 { 4305 4306 KASSERT(SPPP_WLOCKED(sp)); 4307 } 4308 #endif /*INET6*/ 4309 4310 /* 4311 *--------------------------------------------------------------------------* 4312 * * 4313 * The CHAP implementation. * 4314 * * 4315 *--------------------------------------------------------------------------* 4316 */ 4317 /* 4318 * The authentication protocols is implemented on the state machine for 4319 * control protocols. And it uses following actions and events. 4320 * 4321 * Actions: 4322 * - scr: send CHAP_CHALLENGE and CHAP_RESPONSE 4323 * - sca: send CHAP_SUCCESS 4324 * - scn: send CHAP_FAILURE and shutdown lcp 4325 * Events: 4326 * - RCR+: receive CHAP_RESPONSE containing correct digest 4327 * - RCR-: receive CHAP_RESPONSE containing wrong digest 4328 * - RCA: receive CHAP_SUCCESS 4329 * - RCN: (this event is unused) 4330 * - TO+: re-send CHAP_CHALLENGE and CHAP_RESPONSE 4331 * - TO-: this layer finish 4332 */ 4333 4334 /* 4335 * Handle incoming CHAP packets. 4336 */ 4337 void 4338 sppp_chap_input(struct sppp *sp, struct mbuf *m) 4339 { 4340 STDDCL; 4341 struct lcp_header *h; 4342 int len, x; 4343 u_char *value, *name, digest[sizeof(sp->chap.challenge)]; 4344 int value_len, name_len; 4345 MD5_CTX ctx; 4346 4347 len = m->m_pkthdr.len; 4348 if (len < 4) { 4349 if (debug) 4350 log(LOG_DEBUG, 4351 "%s: chap invalid packet length: %d bytes\n", 4352 ifp->if_xname, len); 4353 return; 4354 } 4355 h = mtod(m, struct lcp_header *); 4356 if (len > ntohs(h->len)) 4357 len = ntohs(h->len); 4358 4359 SPPP_LOCK(sp, RW_WRITER); 4360 4361 switch (h->type) { 4362 /* challenge, failure and success are his authproto */ 4363 case CHAP_CHALLENGE: 4364 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4365 /* can't do anything useful */ 4366 sp->pp_auth_failures++; 4367 printf("%s: chap input without my name and my secret being set\n", 4368 ifp->if_xname); 4369 break; 4370 } 4371 value = 1 + (u_char *)(h + 1); 4372 value_len = value[-1]; 4373 name = value + value_len; 4374 name_len = len - value_len - 5; 4375 if (name_len < 0) { 4376 if (debug) { 4377 log(LOG_DEBUG, 4378 "%s: chap corrupted challenge " 4379 "<%s id=0x%x len=%d", 4380 ifp->if_xname, 4381 sppp_auth_type_name(PPP_CHAP, h->type), 4382 h->ident, ntohs(h->len)); 4383 if (len > 4) 4384 sppp_print_bytes((u_char *)(h + 1), 4385 len - 4); 4386 addlog(">\n"); 4387 } 4388 break; 4389 } 4390 4391 if (debug) { 4392 log(LOG_DEBUG, 4393 "%s: chap input <%s id=0x%x len=%d name=", 4394 ifp->if_xname, 4395 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 4396 ntohs(h->len)); 4397 sppp_print_string((char *) name, name_len); 4398 addlog(" value-size=%d value=", value_len); 4399 sppp_print_bytes(value, value_len); 4400 addlog(">\n"); 4401 } 4402 4403 /* Compute reply value. */ 4404 MD5Init(&ctx); 4405 MD5Update(&ctx, &h->ident, 1); 4406 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 4407 MD5Update(&ctx, value, value_len); 4408 MD5Final(sp->chap.digest, &ctx); 4409 sp->chap.digest_len = sizeof(sp->chap.digest); 4410 sp->scp[IDX_CHAP].rconfid = h->ident; 4411 4412 sppp_wq_add(sp->wq_cp, &sp->chap.work_challenge_rcvd); 4413 break; 4414 4415 case CHAP_SUCCESS: 4416 if (debug) { 4417 log(LOG_DEBUG, "%s: chap success", 4418 ifp->if_xname); 4419 if (len > 4) { 4420 addlog(": "); 4421 sppp_print_string((char *)(h + 1), len - 4); 4422 } 4423 addlog("\n"); 4424 } 4425 4426 if (h->ident != sp->scp[IDX_CHAP].rconfid) { 4427 if (debug) { 4428 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4429 ifp->if_xname, chap.name, 4430 h->ident, sp->scp[IDX_CHAP].rconfid); 4431 } 4432 if_statinc(ifp, if_ierrors); 4433 break; 4434 } 4435 4436 if (sp->chap.digest_len == 0) { 4437 if (debug) { 4438 log(LOG_DEBUG, 4439 "%s: receive CHAP success without challenge\n", 4440 ifp->if_xname); 4441 } 4442 if_statinc(ifp, if_ierrors); 4443 break; 4444 } 4445 4446 x = splnet(); 4447 sp->pp_auth_failures = 0; 4448 sp->pp_flags &= ~PP_NEEDAUTH; 4449 splx(x); 4450 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4451 sp->chap.digest_len = 0; 4452 4453 if (!ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_SERV)) { 4454 /* 4455 * we are not authenticator for CHAP, 4456 * generate a dummy RCR+ event without CHAP_RESPONSE 4457 */ 4458 sp->scp[IDX_CHAP].rcr_type = CP_RCR_ACK; 4459 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4460 } 4461 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rca); 4462 break; 4463 4464 case CHAP_FAILURE: 4465 if (h->ident != sp->scp[IDX_CHAP].rconfid) { 4466 if (debug) { 4467 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4468 ifp->if_xname, chap.name, 4469 h->ident, sp->scp[IDX_CHAP].rconfid); 4470 } 4471 if_statinc(ifp, if_ierrors); 4472 break; 4473 } 4474 4475 if (sp->chap.digest_len == 0) { 4476 if (debug) { 4477 log(LOG_DEBUG, 4478 "%s: receive CHAP failure without challenge\n", 4479 ifp->if_xname); 4480 } 4481 if_statinc(ifp, if_ierrors); 4482 break; 4483 } 4484 4485 x = splnet(); 4486 sp->pp_auth_failures++; 4487 splx(x); 4488 if (debug) { 4489 log(LOG_INFO, "%s: chap failure", 4490 ifp->if_xname); 4491 if (len > 4) { 4492 addlog(": "); 4493 sppp_print_string((char *)(h + 1), len - 4); 4494 } 4495 addlog("\n"); 4496 } else 4497 log(LOG_INFO, "%s: chap failure\n", 4498 ifp->if_xname); 4499 4500 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4501 sp->chap.digest_len = 0; 4502 /* 4503 * await LCP shutdown by authenticator, 4504 * so we don't have to enqueue sc->scp[IDX_CHAP].work_rcn 4505 */ 4506 break; 4507 4508 /* response is my authproto */ 4509 case CHAP_RESPONSE: 4510 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4511 /* can't do anything useful */ 4512 printf("%s: chap response" 4513 " without his name and his secret being set\n", 4514 ifp->if_xname); 4515 break; 4516 } 4517 value = 1 + (u_char *)(h + 1); 4518 value_len = value[-1]; 4519 name = value + value_len; 4520 name_len = len - value_len - 5; 4521 if (name_len < 0) { 4522 if (debug) { 4523 log(LOG_DEBUG, 4524 "%s: chap corrupted response " 4525 "<%s id=0x%x len=%d", 4526 ifp->if_xname, 4527 sppp_auth_type_name(PPP_CHAP, h->type), 4528 h->ident, ntohs(h->len)); 4529 if (len > 4) 4530 sppp_print_bytes((u_char *)(h + 1), 4531 len - 4); 4532 addlog(">\n"); 4533 } 4534 break; 4535 } 4536 if (h->ident != sp->scp[IDX_CHAP].confid) { 4537 if (debug) 4538 log(LOG_DEBUG, 4539 "%s: chap dropping response for old ID " 4540 "(got %d, expected %d)\n", 4541 ifp->if_xname, 4542 h->ident, sp->scp[IDX_CHAP].confid); 4543 break; 4544 } else { 4545 sp->scp[IDX_CHAP].rconfid = h->ident; 4546 } 4547 4548 if (sp->hisauth.name != NULL && 4549 (name_len != sp->hisauth.name_len 4550 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 4551 log(LOG_INFO, "%s: chap response, his name ", 4552 ifp->if_xname); 4553 sppp_print_string(name, name_len); 4554 addlog(" != expected "); 4555 sppp_print_string(sp->hisauth.name, 4556 sp->hisauth.name_len); 4557 addlog("\n"); 4558 4559 /* generate RCR- event */ 4560 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4561 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4562 break; 4563 } 4564 4565 if (debug) { 4566 log(LOG_DEBUG, "%s: chap input(%s) " 4567 "<%s id=0x%x len=%d name=", 4568 ifp->if_xname, 4569 sppp_state_name(sp->scp[IDX_CHAP].state), 4570 sppp_auth_type_name(PPP_CHAP, h->type), 4571 h->ident, ntohs(h->len)); 4572 sppp_print_string((char *)name, name_len); 4573 addlog(" value-size=%d value=", value_len); 4574 sppp_print_bytes(value, value_len); 4575 addlog(">\n"); 4576 } 4577 4578 if (value_len == sizeof(sp->chap.challenge) && 4579 value_len == sizeof(sp->chap.digest)) { 4580 MD5Init(&ctx); 4581 MD5Update(&ctx, &h->ident, 1); 4582 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 4583 MD5Update(&ctx, sp->chap.challenge, sizeof(sp->chap.challenge)); 4584 MD5Final(digest, &ctx); 4585 4586 if (memcmp(digest, value, value_len) == 0) { 4587 sp->scp[IDX_CHAP].rcr_type = CP_RCR_ACK; 4588 if (!ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_PEER) || 4589 sp->chap.rechallenging) { 4590 /* generate a dummy RCA event*/ 4591 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rca); 4592 } 4593 } else { 4594 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4595 } 4596 } else { 4597 if (debug) 4598 log(LOG_DEBUG, 4599 "%s: chap bad hash value length: " 4600 "%d bytes, should be %zu\n", 4601 ifp->if_xname, value_len, 4602 sizeof(sp->chap.challenge)); 4603 4604 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4605 } 4606 4607 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4608 break; 4609 4610 default: 4611 /* Unknown CHAP packet type -- ignore. */ 4612 if (debug) { 4613 log(LOG_DEBUG, "%s: chap unknown input(%s) " 4614 "<0x%x id=0x%xh len=%d", 4615 ifp->if_xname, 4616 sppp_state_name(sp->scp[IDX_CHAP].state), 4617 h->type, h->ident, ntohs(h->len)); 4618 if (len > 4) 4619 sppp_print_bytes((u_char *)(h + 1), len - 4); 4620 addlog(">\n"); 4621 } 4622 break; 4623 4624 } 4625 4626 SPPP_UNLOCK(sp); 4627 } 4628 4629 static void 4630 sppp_chap_init(struct sppp *sp) 4631 { 4632 4633 KASSERT(SPPP_WLOCKED(sp)); 4634 4635 sppp_cp_init(&chap, sp); 4636 4637 SPPP_WQ_SET(&sp->chap.work_challenge_rcvd, 4638 sppp_chap_rcv_challenge_event, &chap); 4639 } 4640 4641 static void 4642 sppp_chap_open(struct sppp *sp, void *xcp) 4643 { 4644 4645 KASSERT(SPPP_WLOCKED(sp)); 4646 4647 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4648 sp->chap.digest_len = 0; 4649 sp->chap.rechallenging = false; 4650 sp->chap.response_rcvd = false; 4651 sppp_open_event(sp, xcp); 4652 } 4653 4654 static void 4655 sppp_chap_tlu(struct sppp *sp) 4656 { 4657 STDDCL; 4658 int i, x; 4659 4660 KASSERT(SPPP_WLOCKED(sp)); 4661 4662 i = 0; 4663 sp->scp[IDX_CHAP].rst_counter = sp->lcp.max_configure; 4664 x = splnet(); 4665 sp->pp_auth_failures = 0; 4666 splx(x); 4667 4668 log(LOG_DEBUG, "%s: chap %s", ifp->if_xname, 4669 sp->pp_phase == SPPP_PHASE_NETWORK ? "reconfirmed" : "tlu"); 4670 4671 /* 4672 * Some broken CHAP implementations (Conware CoNet, firmware 4673 * 4.0.?) don't want to re-authenticate their CHAP once the 4674 * initial challenge-response exchange has taken place. 4675 * Provide for an option to avoid rechallenges. 4676 */ 4677 if (ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_SERV) && 4678 (sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4679 /* 4680 * Compute the re-challenge timeout. This will yield 4681 * a number between 300 and 810 seconds. 4682 */ 4683 i = 300 + ((unsigned)(cprng_fast32() & 0xff00) >> 7); 4684 callout_schedule(&sp->scp[IDX_CHAP].ch, i * hz); 4685 4686 if (debug) { 4687 addlog(", next rechallenge in %d seconds", i); 4688 } 4689 } 4690 4691 addlog("\n"); 4692 4693 /* 4694 * If we are already in phase network, we are done here. This 4695 * is the case if this is a dummy tlu event after a re-challenge. 4696 */ 4697 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4698 sppp_phase_network(sp); 4699 } 4700 4701 static void 4702 sppp_chap_scr(struct sppp *sp) 4703 { 4704 uint32_t *ch; 4705 u_char clen, dsize; 4706 int role; 4707 4708 KASSERT(SPPP_WLOCKED(sp)); 4709 4710 role = sppp_auth_role(&chap, sp); 4711 4712 if (ISSET(role, SPPP_AUTH_SERV) && 4713 !sp->chap.response_rcvd) { 4714 /* we are authenticator for CHAP, send challenge */ 4715 ch = (uint32_t *)sp->chap.challenge; 4716 clen = sizeof(sp->chap.challenge); 4717 /* Compute random challenge. */ 4718 cprng_strong(kern_cprng, ch, clen, 0); 4719 4720 sp->scp[IDX_CHAP].confid = ++sp->scp[IDX_CHAP].seq; 4721 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->scp[IDX_CHAP].confid, 4722 sizeof(clen), (const char *)&clen, 4723 sizeof(sp->chap.challenge), sp->chap.challenge, 4724 0); 4725 } 4726 4727 if (ISSET(role, SPPP_AUTH_PEER) && 4728 sp->chap.digest_len > 0) { 4729 /* we are peer for CHAP, send response */ 4730 dsize = sp->chap.digest_len; 4731 4732 sppp_auth_send(&chap, sp, CHAP_RESPONSE, sp->scp[IDX_CHAP].rconfid, 4733 sizeof(dsize), (const char *)&dsize, 4734 sp->chap.digest_len, sp->chap.digest, 4735 sp->myauth.name_len, sp->myauth.name, 0); 4736 } 4737 } 4738 4739 static void 4740 sppp_chap_rcv_challenge_event(struct sppp *sp, void *xcp) 4741 { 4742 const struct cp *cp = xcp; 4743 4744 sp->chap.rechallenging = false; 4745 4746 switch (sp->scp[IDX_CHAP].state) { 4747 case STATE_REQ_SENT: 4748 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 4749 cp->scr(sp); 4750 break; 4751 case STATE_OPENED: 4752 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 4753 cp->scr(sp); 4754 break; 4755 } 4756 } 4757 4758 /* 4759 *--------------------------------------------------------------------------* 4760 * * 4761 * The PAP implementation. * 4762 * * 4763 *--------------------------------------------------------------------------* 4764 */ 4765 /* 4766 * PAP uses following actions and events. 4767 * Actions: 4768 * - scr: send PAP_REQ 4769 * - sca: send PAP_ACK 4770 * - scn: send PAP_NAK 4771 * Events: 4772 * - RCR+: receive PAP_REQ containing correct username and password 4773 * - RCR-: receive PAP_REQ containing wrong username and password 4774 * - RCA: receive PAP_ACK 4775 * - RCN: (this event is unused) 4776 * - TO+: re-send PAP_REQ 4777 * - TO-: this layer finish 4778 */ 4779 4780 /* 4781 * Handle incoming PAP packets. */ 4782 static void 4783 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4784 { 4785 STDDCL; 4786 struct lcp_header *h; 4787 int len, x; 4788 char *name, *secret; 4789 int name_len, secret_len; 4790 4791 /* 4792 * Malicious input might leave this uninitialized, so 4793 * init to an impossible value. 4794 */ 4795 secret_len = -1; 4796 4797 len = m->m_pkthdr.len; 4798 if (len < 5) { 4799 if (debug) 4800 log(LOG_DEBUG, 4801 "%s: pap invalid packet length: %d bytes\n", 4802 ifp->if_xname, len); 4803 return; 4804 } 4805 h = mtod(m, struct lcp_header *); 4806 if (len > ntohs(h->len)) 4807 len = ntohs(h->len); 4808 4809 SPPP_LOCK(sp, RW_WRITER); 4810 4811 switch (h->type) { 4812 /* PAP request is my authproto */ 4813 case PAP_REQ: 4814 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4815 /* can't do anything useful */ 4816 printf("%s: pap request" 4817 " without his name and his secret being set\n", 4818 ifp->if_xname); 4819 break; 4820 } 4821 name = 1 + (u_char *)(h + 1); 4822 name_len = name[-1]; 4823 secret = name + name_len + 1; 4824 if (name_len > len - 6 || 4825 (secret_len = secret[-1]) > len - 6 - name_len) { 4826 if (debug) { 4827 log(LOG_DEBUG, "%s: pap corrupted input " 4828 "<%s id=0x%x len=%d", 4829 ifp->if_xname, 4830 sppp_auth_type_name(PPP_PAP, h->type), 4831 h->ident, ntohs(h->len)); 4832 if (len > 4) 4833 sppp_print_bytes((u_char *)(h + 1), 4834 len - 4); 4835 addlog(">\n"); 4836 } 4837 break; 4838 } 4839 if (debug) { 4840 log(LOG_DEBUG, "%s: pap input(%s) " 4841 "<%s id=0x%x len=%d name=", 4842 ifp->if_xname, 4843 sppp_state_name(sp->scp[IDX_PAP].state), 4844 sppp_auth_type_name(PPP_PAP, h->type), 4845 h->ident, ntohs(h->len)); 4846 sppp_print_string((char *)name, name_len); 4847 addlog(" secret="); 4848 sppp_print_string((char *)secret, secret_len); 4849 addlog(">\n"); 4850 } 4851 4852 sp->scp[IDX_PAP].rconfid = h->ident; 4853 4854 if (name_len == sp->hisauth.name_len && 4855 memcmp(name, sp->hisauth.name, name_len) == 0 && 4856 secret_len == sp->hisauth.secret_len && 4857 memcmp(secret, sp->hisauth.secret, secret_len) == 0) { 4858 sp->scp[IDX_PAP].rcr_type = CP_RCR_ACK; 4859 if (!ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_PEER)) { 4860 /* generate a dummy RCA event*/ 4861 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rca); 4862 } 4863 } else { 4864 sp->scp[IDX_PAP].rcr_type = CP_RCR_NAK; 4865 } 4866 4867 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rcr); 4868 break; 4869 4870 /* ack and nak are his authproto */ 4871 case PAP_ACK: 4872 if (debug) { 4873 log(LOG_DEBUG, "%s: pap success", 4874 ifp->if_xname); 4875 name = 1 + (u_char *)(h + 1); 4876 name_len = name[-1]; 4877 if (len > 5 && name_len < len+4) { 4878 addlog(": "); 4879 sppp_print_string(name, name_len); 4880 } 4881 addlog("\n"); 4882 } 4883 4884 if (h->ident != sp->scp[IDX_PAP].confid) { 4885 if (debug) { 4886 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4887 ifp->if_xname, pap.name, 4888 h->ident, sp->scp[IDX_PAP].rconfid); 4889 } 4890 if_statinc(ifp, if_ierrors); 4891 break; 4892 } 4893 4894 x = splnet(); 4895 sp->pp_auth_failures = 0; 4896 sp->pp_flags &= ~PP_NEEDAUTH; 4897 splx(x); 4898 4899 /* we are not authenticator, generate a dummy RCR+ event */ 4900 if (!ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_SERV)) { 4901 sp->scp[IDX_PAP].rcr_type = CP_RCR_ACK; 4902 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rcr); 4903 } 4904 4905 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rca); 4906 break; 4907 4908 case PAP_NAK: 4909 if (debug) { 4910 log(LOG_INFO, "%s: pap failure", 4911 ifp->if_xname); 4912 name = 1 + (u_char *)(h + 1); 4913 name_len = name[-1]; 4914 if (len > 5 && name_len < len+4) { 4915 addlog(": "); 4916 sppp_print_string(name, name_len); 4917 } 4918 addlog("\n"); 4919 } else 4920 log(LOG_INFO, "%s: pap failure\n", 4921 ifp->if_xname); 4922 4923 if (h->ident != sp->scp[IDX_PAP].confid) { 4924 if (debug) { 4925 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4926 ifp->if_xname, pap.name, 4927 h->ident, sp->scp[IDX_PAP].rconfid); 4928 } 4929 if_statinc(ifp, if_ierrors); 4930 break; 4931 } 4932 4933 sp->pp_auth_failures++; 4934 /* 4935 * await LCP shutdown by authenticator, 4936 * so we don't have to enqueue sc->scp[IDX_PAP].work_rcn 4937 */ 4938 break; 4939 4940 default: 4941 /* Unknown PAP packet type -- ignore. */ 4942 if (debug) { 4943 log(LOG_DEBUG, "%s: pap corrupted input " 4944 "<0x%x id=0x%x len=%d", 4945 ifp->if_xname, 4946 h->type, h->ident, ntohs(h->len)); 4947 if (len > 4) 4948 sppp_print_bytes((u_char *)(h + 1), len - 4); 4949 addlog(">\n"); 4950 } 4951 break; 4952 } 4953 4954 SPPP_UNLOCK(sp); 4955 } 4956 4957 static void 4958 sppp_pap_init(struct sppp *sp) 4959 { 4960 4961 KASSERT(SPPP_WLOCKED(sp)); 4962 sppp_cp_init(&pap, sp); 4963 } 4964 4965 static void 4966 sppp_pap_tlu(struct sppp *sp) 4967 { 4968 STDDCL; 4969 int x; 4970 4971 sp->scp[IDX_PAP].rst_counter = sp->lcp.max_configure; 4972 4973 if (debug) 4974 log(LOG_DEBUG, "%s: %s tlu\n", 4975 ifp->if_xname, pap.name); 4976 4977 x = splnet(); 4978 sp->pp_auth_failures = 0; 4979 splx(x); 4980 4981 if (sp->pp_phase < SPPP_PHASE_NETWORK) 4982 sppp_phase_network(sp); 4983 } 4984 4985 static void 4986 sppp_pap_scr(struct sppp *sp) 4987 { 4988 u_char idlen, pwdlen; 4989 4990 KASSERT(SPPP_WLOCKED(sp)); 4991 4992 if (ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_PEER) && 4993 sp->scp[IDX_PAP].state != STATE_ACK_RCVD) { 4994 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4995 log(LOG_DEBUG, "%s: couldn't send PAP_REQ " 4996 "because of no name or no secret\n", 4997 sp->pp_if.if_xname); 4998 } else { 4999 sp->scp[IDX_PAP].confid = ++sp->scp[IDX_PAP].seq; 5000 pwdlen = sp->myauth.secret_len; 5001 idlen = sp->myauth.name_len; 5002 5003 sppp_auth_send(&pap, sp, PAP_REQ, sp->scp[IDX_PAP].confid, 5004 sizeof idlen, (const char *)&idlen, 5005 idlen, sp->myauth.name, 5006 sizeof pwdlen, (const char *)&pwdlen, 5007 pwdlen, sp->myauth.secret, 5008 0); 5009 } 5010 } 5011 } 5012 5013 /* 5014 * Random miscellaneous functions. 5015 */ 5016 5017 /* 5018 * Send a PAP or CHAP proto packet. 5019 * 5020 * Varadic function, each of the elements for the ellipsis is of type 5021 * ``size_t mlen, const u_char *msg''. Processing will stop iff 5022 * mlen == 0. 5023 * NOTE: never declare variadic functions with types subject to type 5024 * promotion (i.e. u_char). This is asking for big trouble depending 5025 * on the architecture you are on... 5026 */ 5027 5028 static void 5029 sppp_auth_send(const struct cp *cp, struct sppp *sp, 5030 unsigned int type, unsigned int id, 5031 ...) 5032 { 5033 STDDCL; 5034 struct lcp_header *lh; 5035 struct mbuf *m; 5036 u_char *p; 5037 int len; 5038 size_t pkthdrlen; 5039 unsigned int mlen; 5040 const char *msg; 5041 va_list ap; 5042 5043 KASSERT(SPPP_WLOCKED(sp)); 5044 5045 MGETHDR(m, M_DONTWAIT, MT_DATA); 5046 if (! m) 5047 return; 5048 m_reset_rcvif(m); 5049 5050 if (sp->pp_flags & PP_NOFRAMING) { 5051 *mtod(m, uint16_t *) = htons(cp->proto); 5052 pkthdrlen = 2; 5053 lh = (struct lcp_header *)(mtod(m, uint8_t *)+2); 5054 } else { 5055 struct ppp_header *h; 5056 h = mtod(m, struct ppp_header *); 5057 h->address = PPP_ALLSTATIONS; /* broadcast address */ 5058 h->control = PPP_UI; /* Unnumbered Info */ 5059 h->protocol = htons(cp->proto); 5060 pkthdrlen = PPP_HEADER_LEN; 5061 5062 lh = (struct lcp_header *)(h + 1); 5063 } 5064 5065 lh->type = type; 5066 lh->ident = id; 5067 p = (u_char *)(lh + 1); 5068 5069 va_start(ap, id); 5070 len = 0; 5071 5072 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 5073 msg = va_arg(ap, const char *); 5074 len += mlen; 5075 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 5076 va_end(ap); 5077 m_freem(m); 5078 return; 5079 } 5080 5081 memcpy(p, msg, mlen); 5082 p += mlen; 5083 } 5084 va_end(ap); 5085 5086 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 5087 lh->len = htons(LCP_HEADER_LEN + len); 5088 5089 if (debug) { 5090 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 5091 ifp->if_xname, cp->name, 5092 sppp_auth_type_name(cp->proto, lh->type), 5093 lh->ident, ntohs(lh->len)); 5094 if (len) 5095 sppp_print_bytes((u_char *)(lh + 1), len); 5096 addlog(">\n"); 5097 } 5098 if (IF_QFULL(&sp->pp_cpq)) { 5099 IF_DROP(&sp->pp_fastq); 5100 IF_DROP(&ifp->if_snd); 5101 m_freem(m); 5102 if_statinc(ifp, if_oerrors); 5103 return; 5104 } 5105 5106 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 5107 IF_ENQUEUE(&sp->pp_cpq, m); 5108 5109 if (! (ifp->if_flags & IFF_OACTIVE)) { 5110 SPPP_UNLOCK(sp); 5111 if_start_lock(ifp); 5112 SPPP_LOCK(sp, RW_WRITER); 5113 } 5114 } 5115 5116 static int 5117 sppp_auth_role(const struct cp *cp, struct sppp *sp) 5118 { 5119 int role; 5120 5121 role = SPPP_AUTH_NOROLE; 5122 5123 if (sp->hisauth.proto == cp->proto && 5124 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) 5125 SET(role, SPPP_AUTH_SERV); 5126 5127 if (sp->myauth.proto == cp->proto) 5128 SET(role, SPPP_AUTH_PEER); 5129 5130 return role; 5131 } 5132 5133 static void 5134 sppp_auth_to_event(struct sppp *sp, void *xcp) 5135 { 5136 const struct cp *cp = xcp; 5137 bool override; 5138 int state; 5139 STDDCL; 5140 5141 KASSERT(SPPP_WLOCKED(sp)); 5142 5143 override = false; 5144 state = sp->scp[cp->protoidx].state; 5145 5146 if (sp->scp[cp->protoidx].rst_counter > 0) { 5147 /* override TO+ event */ 5148 switch (state) { 5149 case STATE_OPENED: 5150 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 5151 override = true; 5152 sp->chap.rechallenging = true; 5153 sp->chap.response_rcvd = false; 5154 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 5155 cp->scr(sp); 5156 } 5157 break; 5158 5159 case STATE_ACK_RCVD: 5160 override = true; 5161 cp->scr(sp); 5162 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 5163 break; 5164 } 5165 } 5166 5167 if (override) { 5168 if (debug) 5169 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 5170 ifp->if_xname, cp->name, 5171 sppp_state_name(state), 5172 sp->scp[cp->protoidx].rst_counter); 5173 sp->scp[cp->protoidx].rst_counter--; 5174 } else { 5175 sppp_to_event(sp, xcp); 5176 } 5177 } 5178 5179 static void 5180 sppp_auth_sca_scn(const struct cp *cp, struct sppp *sp) 5181 { 5182 static const char *succmsg = "Welcome!"; 5183 static const char *failmsg = "Failed..."; 5184 const char *msg; 5185 u_char type, rconfid, mlen; 5186 5187 KASSERT(SPPP_WLOCKED(sp)); 5188 5189 if (!ISSET(sppp_auth_role(cp, sp), SPPP_AUTH_SERV)) 5190 return; 5191 5192 rconfid = sp->scp[cp->protoidx].rconfid; 5193 5194 if (sp->scp[cp->protoidx].rcr_type == CP_RCR_ACK) { 5195 type = cp->proto == PPP_CHAP ? CHAP_SUCCESS : PAP_ACK; 5196 msg = succmsg; 5197 mlen = sizeof(succmsg) - 1; 5198 5199 sp->pp_auth_failures = 0; 5200 } else { 5201 type = cp->proto == PPP_CHAP ? CHAP_FAILURE : PAP_NAK; 5202 msg = failmsg; 5203 mlen = sizeof(failmsg) - 1; 5204 5205 /* shutdown LCP if auth failed */ 5206 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5207 sp->pp_auth_failures++; 5208 } 5209 5210 sppp_auth_send(cp, sp, type, rconfid, 5211 mlen, (const u_char *)msg, 0); 5212 } 5213 5214 /* 5215 * Send keepalive packets, every 10 seconds. 5216 */ 5217 static void 5218 sppp_keepalive(void *dummy) 5219 { 5220 struct sppp *sp; 5221 int s; 5222 time_t now; 5223 5224 SPPPQ_LOCK(); 5225 5226 s = splnet(); 5227 now = time_uptime; 5228 for (sp=spppq; sp; sp=sp->pp_next) { 5229 struct ifnet *ifp = NULL; 5230 5231 SPPP_LOCK(sp, RW_WRITER); 5232 ifp = &sp->pp_if; 5233 5234 /* check idle timeout */ 5235 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 5236 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 5237 /* idle timeout is enabled for this interface */ 5238 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 5239 if (ifp->if_flags & IFF_DEBUG) 5240 printf("%s: no activity for %lu seconds\n", 5241 sp->pp_if.if_xname, 5242 (unsigned long)(now-sp->pp_last_activity)); 5243 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5244 SPPP_UNLOCK(sp); 5245 continue; 5246 } 5247 } 5248 5249 /* Keepalive mode disabled or channel down? */ 5250 if (! (sp->pp_flags & PP_KEEPALIVE) || 5251 ! (ifp->if_flags & IFF_RUNNING)) { 5252 SPPP_UNLOCK(sp); 5253 continue; 5254 } 5255 5256 /* No keepalive in PPP mode if LCP not opened yet. */ 5257 if (! (sp->pp_flags & PP_CISCO) && 5258 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 5259 SPPP_UNLOCK(sp); 5260 continue; 5261 } 5262 5263 /* No echo reply, but maybe user data passed through? */ 5264 if ((now - sp->pp_last_receive) < sp->pp_max_noreceive) { 5265 sp->pp_alivecnt = 0; 5266 SPPP_UNLOCK(sp); 5267 continue; 5268 } 5269 5270 if (sp->pp_alivecnt >= sp->pp_maxalive) { 5271 /* No keepalive packets got. Stop the interface. */ 5272 sppp_wq_add(sp->wq_cp, &sp->work_ifdown); 5273 5274 if (! (sp->pp_flags & PP_CISCO)) { 5275 printf("%s: LCP keepalive timed out, going to restart the connection\n", 5276 ifp->if_xname); 5277 sp->pp_alivecnt = 0; 5278 5279 /* we are down, close all open protocols */ 5280 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5281 5282 /* And now prepare LCP to reestablish the link, if configured to do so. */ 5283 sp->lcp.reestablish = true; 5284 5285 SPPP_UNLOCK(sp); 5286 continue; 5287 } 5288 } 5289 if (sp->pp_alivecnt < sp->pp_maxalive) 5290 ++sp->pp_alivecnt; 5291 if (sp->pp_flags & PP_CISCO) 5292 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, 5293 ++sp->scp[IDX_LCP].seq, sp->scp[IDX_LCP].rseq); 5294 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 5295 int32_t nmagic = htonl(sp->lcp.magic); 5296 sp->lcp.echoid = ++sp->scp[IDX_LCP].seq; 5297 sppp_cp_send(sp, PPP_LCP, ECHO_REQ, 5298 sp->lcp.echoid, 4, &nmagic); 5299 } 5300 5301 SPPP_UNLOCK(sp); 5302 } 5303 splx(s); 5304 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 5305 5306 SPPPQ_UNLOCK(); 5307 } 5308 5309 #ifdef INET 5310 /* 5311 * Get both IP addresses. 5312 */ 5313 static void 5314 sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, uint32_t *srcmask) 5315 { 5316 struct ifnet *ifp = &sp->pp_if; 5317 struct ifaddr *ifa; 5318 struct sockaddr_in *si, *sm; 5319 uint32_t ssrc, ddst; 5320 int s; 5321 struct psref psref; 5322 5323 sm = NULL; 5324 ssrc = ddst = 0; 5325 /* 5326 * Pick the first AF_INET address from the list, 5327 * aliases don't make any sense on a p2p link anyway. 5328 */ 5329 si = 0; 5330 s = pserialize_read_enter(); 5331 IFADDR_READER_FOREACH(ifa, ifp) { 5332 if (ifa->ifa_addr->sa_family == AF_INET) { 5333 si = (struct sockaddr_in *)ifa->ifa_addr; 5334 sm = (struct sockaddr_in *)ifa->ifa_netmask; 5335 if (si) { 5336 ifa_acquire(ifa, &psref); 5337 break; 5338 } 5339 } 5340 } 5341 pserialize_read_exit(s); 5342 if (ifa) { 5343 if (si && si->sin_addr.s_addr) { 5344 ssrc = si->sin_addr.s_addr; 5345 if (srcmask) 5346 *srcmask = ntohl(sm->sin_addr.s_addr); 5347 } 5348 5349 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 5350 if (si && si->sin_addr.s_addr) 5351 ddst = si->sin_addr.s_addr; 5352 ifa_release(ifa, &psref); 5353 } 5354 5355 if (dst) *dst = ntohl(ddst); 5356 if (src) *src = ntohl(ssrc); 5357 } 5358 5359 /* 5360 * Set IP addresses. Must be called at splnet. 5361 * If an address is 0, leave it the way it is. 5362 */ 5363 static void 5364 sppp_set_ip_addrs(struct sppp *sp) 5365 { 5366 STDDCL; 5367 struct ifaddr *ifa; 5368 struct sockaddr_in *si, *dest; 5369 uint32_t myaddr = 0, hisaddr = 0; 5370 int s; 5371 5372 IFNET_LOCK(ifp); 5373 5374 /* 5375 * Pick the first AF_INET address from the list, 5376 * aliases don't make any sense on a p2p link anyway. 5377 */ 5378 si = dest = NULL; 5379 s = pserialize_read_enter(); 5380 IFADDR_READER_FOREACH(ifa, ifp) { 5381 if (ifa->ifa_addr->sa_family == AF_INET) { 5382 si = (struct sockaddr_in *)ifa->ifa_addr; 5383 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5384 break; 5385 } 5386 } 5387 pserialize_read_exit(s); 5388 5389 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 5390 myaddr = sp->ipcp.req_myaddr; 5391 else if (si != NULL) 5392 myaddr = ntohl(si->sin_addr.s_addr); 5393 5394 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 5395 hisaddr = sp->ipcp.req_hisaddr; 5396 else if (dest != NULL) 5397 hisaddr = ntohl(dest->sin_addr.s_addr); 5398 5399 if (si != NULL && dest != NULL) { 5400 int error; 5401 struct sockaddr_in new_sin = *si; 5402 struct sockaddr_in new_dst = *dest; 5403 5404 if (myaddr != 0) 5405 new_sin.sin_addr.s_addr = htonl(myaddr); 5406 if (hisaddr != 0) { 5407 new_dst.sin_addr.s_addr = htonl(hisaddr); 5408 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) 5409 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 5410 } 5411 5412 in_addrhash_remove(ifatoia(ifa)); 5413 5414 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5415 5416 in_addrhash_insert(ifatoia(ifa)); 5417 5418 if (debug && error) 5419 { 5420 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5421 ifp->if_xname, __func__, error); 5422 } 5423 if (!error) { 5424 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5425 } 5426 } 5427 5428 if (ifp->if_mtu > sp->lcp.their_mru) { 5429 sp->pp_saved_mtu = ifp->if_mtu; 5430 ifp->if_mtu = sp->lcp.their_mru; 5431 if (debug) 5432 log(LOG_DEBUG, 5433 "%s: setting MTU to %" PRIu64 " bytes\n", 5434 ifp->if_xname, ifp->if_mtu); 5435 } 5436 5437 IFNET_UNLOCK(ifp); 5438 5439 sppp_notify_con(sp); 5440 } 5441 5442 /* 5443 * Clear IP addresses. Must be called at splnet. 5444 */ 5445 static void 5446 sppp_clear_ip_addrs(struct sppp *sp) 5447 { 5448 STDDCL; 5449 struct ifaddr *ifa; 5450 struct sockaddr_in *si, *dest; 5451 int s; 5452 5453 IFNET_LOCK(ifp); 5454 5455 /* 5456 * Pick the first AF_INET address from the list, 5457 * aliases don't make any sense on a p2p link anyway. 5458 */ 5459 si = dest = NULL; 5460 s = pserialize_read_enter(); 5461 IFADDR_READER_FOREACH(ifa, ifp) { 5462 if (ifa->ifa_addr->sa_family == AF_INET) { 5463 si = (struct sockaddr_in *)ifa->ifa_addr; 5464 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5465 break; 5466 } 5467 } 5468 pserialize_read_exit(s); 5469 5470 if (si != NULL) { 5471 struct sockaddr_in new_sin = *si; 5472 struct sockaddr_in new_dst = *dest; 5473 int error; 5474 5475 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 5476 new_sin.sin_addr.s_addr = 0; 5477 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 5478 new_dst.sin_addr.s_addr = sp->ipcp.saved_hisaddr; 5479 5480 in_addrhash_remove(ifatoia(ifa)); 5481 5482 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5483 5484 in_addrhash_insert(ifatoia(ifa)); 5485 5486 if (debug && error) 5487 { 5488 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5489 ifp->if_xname, __func__, error); 5490 } 5491 if (!error) { 5492 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5493 } 5494 } 5495 5496 if (sp->pp_saved_mtu > 0) { 5497 ifp->if_mtu = sp->pp_saved_mtu; 5498 sp->pp_saved_mtu = 0; 5499 if (debug) 5500 log(LOG_DEBUG, 5501 "%s: resetting MTU to %" PRIu64 " bytes\n", 5502 ifp->if_xname, ifp->if_mtu); 5503 } 5504 5505 IFNET_UNLOCK(ifp); 5506 } 5507 #endif 5508 5509 #ifdef INET6 5510 /* 5511 * Get both IPv6 addresses. 5512 */ 5513 static void 5514 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 5515 struct in6_addr *srcmask) 5516 { 5517 struct ifnet *ifp = &sp->pp_if; 5518 struct ifaddr *ifa; 5519 struct sockaddr_in6 *si, *sm; 5520 struct in6_addr ssrc, ddst; 5521 int s; 5522 struct psref psref; 5523 5524 sm = NULL; 5525 memset(&ssrc, 0, sizeof(ssrc)); 5526 memset(&ddst, 0, sizeof(ddst)); 5527 /* 5528 * Pick the first link-local AF_INET6 address from the list, 5529 * aliases don't make any sense on a p2p link anyway. 5530 */ 5531 si = 0; 5532 s = pserialize_read_enter(); 5533 IFADDR_READER_FOREACH(ifa, ifp) { 5534 if (ifa->ifa_addr->sa_family == AF_INET6) { 5535 si = (struct sockaddr_in6 *)ifa->ifa_addr; 5536 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 5537 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) { 5538 ifa_acquire(ifa, &psref); 5539 break; 5540 } 5541 } 5542 } 5543 pserialize_read_exit(s); 5544 5545 if (ifa) { 5546 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 5547 memcpy(&ssrc, &si->sin6_addr, sizeof(ssrc)); 5548 if (srcmask) { 5549 memcpy(srcmask, &sm->sin6_addr, 5550 sizeof(*srcmask)); 5551 } 5552 } 5553 5554 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 5555 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 5556 memcpy(&ddst, &si->sin6_addr, sizeof(ddst)); 5557 ifa_release(ifa, &psref); 5558 } 5559 5560 if (dst) 5561 memcpy(dst, &ddst, sizeof(*dst)); 5562 if (src) 5563 memcpy(src, &ssrc, sizeof(*src)); 5564 } 5565 5566 #ifdef IPV6CP_MYIFID_DYN 5567 /* 5568 * Generate random ifid. 5569 */ 5570 static void 5571 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 5572 { 5573 /* TBD */ 5574 } 5575 5576 /* 5577 * Set my IPv6 address. Must be called at splnet. 5578 */ 5579 static void 5580 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 5581 { 5582 STDDCL; 5583 struct ifaddr *ifa; 5584 struct sockaddr_in6 *sin6; 5585 int s; 5586 struct psref psref; 5587 5588 IFNET_LOCK(ifp); 5589 5590 /* 5591 * Pick the first link-local AF_INET6 address from the list, 5592 * aliases don't make any sense on a p2p link anyway. 5593 */ 5594 5595 sin6 = NULL; 5596 s = pserialize_read_enter(); 5597 IFADDR_READER_FOREACH(ifa, ifp) 5598 { 5599 if (ifa->ifa_addr->sa_family == AF_INET6) 5600 { 5601 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 5602 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 5603 ifa_acquire(ifa, &psref); 5604 break; 5605 } 5606 } 5607 } 5608 pserialize_read_exit(s); 5609 5610 if (ifa && sin6) 5611 { 5612 int error; 5613 struct sockaddr_in6 new_sin6 = *sin6; 5614 5615 memcpy(&new_sin6.sin6_addr, src, sizeof(new_sin6.sin6_addr)); 5616 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 5617 if (debug && error) 5618 { 5619 log(LOG_DEBUG, "%s: %s: in6_ifinit failed, error=%d\n", 5620 ifp->if_xname, __func__, error); 5621 } 5622 if (!error) { 5623 pfil_run_addrhooks(if_pfil, SIOCAIFADDR_IN6, ifa); 5624 } 5625 ifa_release(ifa, &psref); 5626 } 5627 5628 IFNET_UNLOCK(ifp); 5629 } 5630 #endif 5631 5632 /* 5633 * Suggest a candidate address to be used by peer. 5634 */ 5635 static void 5636 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 5637 { 5638 struct in6_addr myaddr; 5639 struct timeval tv; 5640 5641 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 5642 5643 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 5644 microtime(&tv); 5645 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 5646 myaddr.s6_addr[14] ^= 0xff; 5647 myaddr.s6_addr[15] ^= 0xff; 5648 } else { 5649 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 5650 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 5651 } 5652 if (suggest) 5653 memcpy(suggest, &myaddr, sizeof(myaddr)); 5654 } 5655 #endif /*INET6*/ 5656 5657 /* 5658 * Process ioctl requests specific to the PPP interface. 5659 * Permissions have already been checked. 5660 */ 5661 static int 5662 sppp_params(struct sppp *sp, u_long cmd, void *data) 5663 { 5664 switch (cmd) { 5665 case SPPPGETAUTHCFG: 5666 { 5667 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5668 int error; 5669 size_t len; 5670 5671 SPPP_LOCK(sp, RW_READER); 5672 5673 cfg->myauthflags = sp->myauth.flags; 5674 cfg->hisauthflags = sp->hisauth.flags; 5675 strlcpy(cfg->ifname, sp->pp_if.if_xname, sizeof(cfg->ifname)); 5676 cfg->hisauth = 0; 5677 if (sp->hisauth.proto) 5678 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5679 cfg->myauth = 0; 5680 if (sp->myauth.proto) 5681 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5682 if (cfg->myname_length == 0) { 5683 if (sp->myauth.name != NULL) 5684 cfg->myname_length = sp->myauth.name_len + 1; 5685 } else { 5686 if (sp->myauth.name == NULL) { 5687 cfg->myname_length = 0; 5688 } else { 5689 len = sp->myauth.name_len + 1; 5690 5691 if (cfg->myname_length < len) { 5692 SPPP_UNLOCK(sp); 5693 return (ENAMETOOLONG); 5694 } 5695 error = copyout(sp->myauth.name, cfg->myname, len); 5696 if (error) { 5697 SPPP_UNLOCK(sp); 5698 return error; 5699 } 5700 } 5701 } 5702 if (cfg->hisname_length == 0) { 5703 if (sp->hisauth.name != NULL) 5704 cfg->hisname_length = sp->hisauth.name_len + 1; 5705 } else { 5706 if (sp->hisauth.name == NULL) { 5707 cfg->hisname_length = 0; 5708 } else { 5709 len = sp->hisauth.name_len + 1; 5710 5711 if (cfg->hisname_length < len) { 5712 SPPP_UNLOCK(sp); 5713 return (ENAMETOOLONG); 5714 } 5715 error = copyout(sp->hisauth.name, cfg->hisname, len); 5716 if (error) { 5717 SPPP_UNLOCK(sp); 5718 return error; 5719 } 5720 } 5721 } 5722 SPPP_UNLOCK(sp); 5723 } 5724 break; 5725 case SPPPSETAUTHCFG: 5726 { 5727 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5728 int error; 5729 5730 SPPP_LOCK(sp, RW_WRITER); 5731 5732 if (sp->myauth.name) { 5733 free(sp->myauth.name, M_DEVBUF); 5734 sp->myauth.name = NULL; 5735 } 5736 if (sp->myauth.secret) { 5737 free(sp->myauth.secret, M_DEVBUF); 5738 sp->myauth.secret = NULL; 5739 } 5740 if (sp->hisauth.name) { 5741 free(sp->hisauth.name, M_DEVBUF); 5742 sp->hisauth.name = NULL; 5743 } 5744 if (sp->hisauth.secret) { 5745 free(sp->hisauth.secret, M_DEVBUF); 5746 sp->hisauth.secret = NULL; 5747 } 5748 5749 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5750 if (cfg->hisname_length >= MCLBYTES) { 5751 SPPP_UNLOCK(sp); 5752 return (ENAMETOOLONG); 5753 } 5754 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5755 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5756 if (error) { 5757 free(sp->hisauth.name, M_DEVBUF); 5758 sp->hisauth.name = NULL; 5759 SPPP_UNLOCK(sp); 5760 return error; 5761 } 5762 sp->hisauth.name_len = cfg->hisname_length - 1; 5763 sp->hisauth.name[sp->hisauth.name_len] = 0; 5764 } 5765 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5766 if (cfg->hissecret_length >= MCLBYTES) { 5767 SPPP_UNLOCK(sp); 5768 return (ENAMETOOLONG); 5769 } 5770 sp->hisauth.secret = malloc(cfg->hissecret_length, 5771 M_DEVBUF, M_WAITOK); 5772 error = copyin(cfg->hissecret, sp->hisauth.secret, 5773 cfg->hissecret_length); 5774 if (error) { 5775 free(sp->hisauth.secret, M_DEVBUF); 5776 sp->hisauth.secret = NULL; 5777 SPPP_UNLOCK(sp); 5778 return error; 5779 } 5780 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5781 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5782 } 5783 if (cfg->myname != NULL && cfg->myname_length > 0) { 5784 if (cfg->myname_length >= MCLBYTES) { 5785 SPPP_UNLOCK(sp); 5786 return (ENAMETOOLONG); 5787 } 5788 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5789 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5790 if (error) { 5791 free(sp->myauth.name, M_DEVBUF); 5792 sp->myauth.name = NULL; 5793 SPPP_UNLOCK(sp); 5794 return error; 5795 } 5796 sp->myauth.name_len = cfg->myname_length - 1; 5797 sp->myauth.name[sp->myauth.name_len] = 0; 5798 } 5799 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5800 if (cfg->mysecret_length >= MCLBYTES) { 5801 SPPP_UNLOCK(sp); 5802 return (ENAMETOOLONG); 5803 } 5804 sp->myauth.secret = malloc(cfg->mysecret_length, 5805 M_DEVBUF, M_WAITOK); 5806 error = copyin(cfg->mysecret, sp->myauth.secret, 5807 cfg->mysecret_length); 5808 if (error) { 5809 free(sp->myauth.secret, M_DEVBUF); 5810 sp->myauth.secret = NULL; 5811 SPPP_UNLOCK(sp); 5812 return error; 5813 } 5814 sp->myauth.secret_len = cfg->mysecret_length - 1; 5815 sp->myauth.secret[sp->myauth.secret_len] = 0; 5816 } 5817 sp->myauth.flags = cfg->myauthflags; 5818 if (cfg->myauth) 5819 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5820 sp->hisauth.flags = cfg->hisauthflags; 5821 if (cfg->hisauth) 5822 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5823 sp->pp_auth_failures = 0; 5824 if (sp->hisauth.proto != 0) 5825 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 5826 else 5827 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 5828 5829 SPPP_UNLOCK(sp); 5830 } 5831 break; 5832 case SPPPGETLCPCFG: 5833 { 5834 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5835 5836 SPPP_LOCK(sp, RW_READER); 5837 lcpp->lcp_timeout = sp->lcp.timeout; 5838 SPPP_UNLOCK(sp); 5839 } 5840 break; 5841 case SPPPSETLCPCFG: 5842 { 5843 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5844 5845 SPPP_LOCK(sp, RW_WRITER); 5846 sp->lcp.timeout = lcpp->lcp_timeout; 5847 SPPP_UNLOCK(sp); 5848 } 5849 break; 5850 case SPPPGETSTATUS: 5851 { 5852 struct spppstatus *status = (struct spppstatus *)data; 5853 5854 SPPP_LOCK(sp, RW_READER); 5855 status->phase = sp->pp_phase; 5856 SPPP_UNLOCK(sp); 5857 } 5858 break; 5859 case SPPPGETSTATUSNCP: 5860 { 5861 struct spppstatusncp *status = (struct spppstatusncp *)data; 5862 5863 SPPP_LOCK(sp, RW_READER); 5864 status->phase = sp->pp_phase; 5865 status->ncpup = sppp_cp_check(sp, CP_NCP); 5866 SPPP_UNLOCK(sp); 5867 } 5868 break; 5869 case SPPPGETIDLETO: 5870 { 5871 struct spppidletimeout *to = (struct spppidletimeout *)data; 5872 5873 SPPP_LOCK(sp, RW_READER); 5874 to->idle_seconds = sp->pp_idle_timeout; 5875 SPPP_UNLOCK(sp); 5876 } 5877 break; 5878 case SPPPSETIDLETO: 5879 { 5880 struct spppidletimeout *to = (struct spppidletimeout *)data; 5881 5882 SPPP_LOCK(sp, RW_WRITER); 5883 sp->pp_idle_timeout = to->idle_seconds; 5884 SPPP_UNLOCK(sp); 5885 } 5886 break; 5887 case SPPPSETAUTHFAILURE: 5888 { 5889 struct spppauthfailuresettings *afsettings = 5890 (struct spppauthfailuresettings *)data; 5891 5892 SPPP_LOCK(sp, RW_WRITER); 5893 sp->pp_max_auth_fail = afsettings->max_failures; 5894 sp->pp_auth_failures = 0; 5895 SPPP_UNLOCK(sp); 5896 } 5897 break; 5898 case SPPPGETAUTHFAILURES: 5899 { 5900 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5901 5902 SPPP_LOCK(sp, RW_READER); 5903 stats->auth_failures = sp->pp_auth_failures; 5904 stats->max_failures = sp->pp_max_auth_fail; 5905 SPPP_UNLOCK(sp); 5906 } 5907 break; 5908 case SPPPSETDNSOPTS: 5909 { 5910 struct spppdnssettings *req = (struct spppdnssettings *)data; 5911 5912 SPPP_LOCK(sp, RW_WRITER); 5913 sp->query_dns = req->query_dns & 3; 5914 SPPP_UNLOCK(sp); 5915 } 5916 break; 5917 case SPPPGETDNSOPTS: 5918 { 5919 struct spppdnssettings *req = (struct spppdnssettings *)data; 5920 5921 SPPP_LOCK(sp, RW_READER); 5922 req->query_dns = sp->query_dns; 5923 SPPP_UNLOCK(sp); 5924 } 5925 break; 5926 case SPPPGETDNSADDRS: 5927 { 5928 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; 5929 5930 SPPP_LOCK(sp, RW_READER); 5931 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5932 SPPP_UNLOCK(sp); 5933 } 5934 break; 5935 case SPPPGETKEEPALIVE: 5936 { 5937 struct spppkeepalivesettings *settings = 5938 (struct spppkeepalivesettings*)data; 5939 5940 SPPP_LOCK(sp, RW_READER); 5941 settings->maxalive = sp->pp_maxalive; 5942 settings->max_noreceive = sp->pp_max_noreceive; 5943 SPPP_UNLOCK(sp); 5944 } 5945 break; 5946 case SPPPSETKEEPALIVE: 5947 { 5948 struct spppkeepalivesettings *settings = 5949 (struct spppkeepalivesettings*)data; 5950 5951 SPPP_LOCK(sp, RW_WRITER); 5952 sp->pp_maxalive = settings->maxalive; 5953 sp->pp_max_noreceive = settings->max_noreceive; 5954 SPPP_UNLOCK(sp); 5955 } 5956 break; 5957 default: 5958 { 5959 int ret; 5960 5961 MODULE_HOOK_CALL(sppp_params_50_hook, (sp, cmd, data), 5962 enosys(), ret); 5963 if (ret != ENOSYS) 5964 return ret; 5965 return (EINVAL); 5966 } 5967 } 5968 return (0); 5969 } 5970 5971 static void 5972 sppp_phase_network(struct sppp *sp) 5973 { 5974 int i; 5975 5976 KASSERT(SPPP_WLOCKED(sp)); 5977 5978 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 5979 5980 /* Notify NCPs now. */ 5981 for (i = 0; i < IDX_COUNT; i++) 5982 if ((cps[i])->flags & CP_NCP) 5983 sppp_wq_add(sp->wq_cp, &sp->scp[i].work_open); 5984 } 5985 5986 static const char * 5987 sppp_cp_type_name(u_char type) 5988 { 5989 static char buf[12]; 5990 switch (type) { 5991 case CONF_REQ: return "conf-req"; 5992 case CONF_ACK: return "conf-ack"; 5993 case CONF_NAK: return "conf-nak"; 5994 case CONF_REJ: return "conf-rej"; 5995 case TERM_REQ: return "term-req"; 5996 case TERM_ACK: return "term-ack"; 5997 case CODE_REJ: return "code-rej"; 5998 case PROTO_REJ: return "proto-rej"; 5999 case ECHO_REQ: return "echo-req"; 6000 case ECHO_REPLY: return "echo-reply"; 6001 case DISC_REQ: return "discard-req"; 6002 } 6003 snprintf(buf, sizeof(buf), "0x%x", type); 6004 return buf; 6005 } 6006 6007 static const char * 6008 sppp_auth_type_name(u_short proto, u_char type) 6009 { 6010 static char buf[32]; 6011 const char *name; 6012 6013 switch (proto) { 6014 case PPP_CHAP: 6015 switch (type) { 6016 case CHAP_CHALLENGE: return "challenge"; 6017 case CHAP_RESPONSE: return "response"; 6018 case CHAP_SUCCESS: return "success"; 6019 case CHAP_FAILURE: return "failure"; 6020 default: name = "chap"; break; 6021 } 6022 break; 6023 6024 case PPP_PAP: 6025 switch (type) { 6026 case PAP_REQ: return "req"; 6027 case PAP_ACK: return "ack"; 6028 case PAP_NAK: return "nak"; 6029 default: name = "pap"; break; 6030 } 6031 break; 6032 6033 default: 6034 name = "bad"; 6035 break; 6036 } 6037 6038 snprintf(buf, sizeof(buf), "%s(%#x) %#x", name, proto, type); 6039 return buf; 6040 } 6041 6042 static const char * 6043 sppp_lcp_opt_name(u_char opt) 6044 { 6045 static char buf[12]; 6046 switch (opt) { 6047 case LCP_OPT_MRU: return "mru"; 6048 case LCP_OPT_ASYNC_MAP: return "async-map"; 6049 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 6050 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 6051 case LCP_OPT_MAGIC: return "magic"; 6052 case LCP_OPT_PROTO_COMP: return "proto-comp"; 6053 case LCP_OPT_ADDR_COMP: return "addr-comp"; 6054 case LCP_OPT_SELF_DESC_PAD: return "sdpad"; 6055 case LCP_OPT_CALL_BACK: return "callback"; 6056 case LCP_OPT_COMPOUND_FRMS: return "cmpd-frms"; 6057 case LCP_OPT_MP_MRRU: return "mrru"; 6058 case LCP_OPT_MP_SSNHF: return "mp-ssnhf"; 6059 case LCP_OPT_MP_EID: return "mp-eid"; 6060 } 6061 snprintf(buf, sizeof(buf), "0x%x", opt); 6062 return buf; 6063 } 6064 6065 static const char * 6066 sppp_ipcp_opt_name(u_char opt) 6067 { 6068 static char buf[12]; 6069 switch (opt) { 6070 case IPCP_OPT_ADDRESSES: return "addresses"; 6071 case IPCP_OPT_COMPRESSION: return "compression"; 6072 case IPCP_OPT_ADDRESS: return "address"; 6073 } 6074 snprintf(buf, sizeof(buf), "0x%x", opt); 6075 return buf; 6076 } 6077 6078 #ifdef INET6 6079 static const char * 6080 sppp_ipv6cp_opt_name(u_char opt) 6081 { 6082 static char buf[12]; 6083 switch (opt) { 6084 case IPV6CP_OPT_IFID: return "ifid"; 6085 case IPV6CP_OPT_COMPRESSION: return "compression"; 6086 } 6087 snprintf(buf, sizeof(buf), "0x%x", opt); 6088 return buf; 6089 } 6090 #endif 6091 6092 static const char * 6093 sppp_state_name(int state) 6094 { 6095 switch (state) { 6096 case STATE_INITIAL: return "initial"; 6097 case STATE_STARTING: return "starting"; 6098 case STATE_CLOSED: return "closed"; 6099 case STATE_STOPPED: return "stopped"; 6100 case STATE_CLOSING: return "closing"; 6101 case STATE_STOPPING: return "stopping"; 6102 case STATE_REQ_SENT: return "req-sent"; 6103 case STATE_ACK_RCVD: return "ack-rcvd"; 6104 case STATE_ACK_SENT: return "ack-sent"; 6105 case STATE_OPENED: return "opened"; 6106 } 6107 return "illegal"; 6108 } 6109 6110 static const char * 6111 sppp_phase_name(int phase) 6112 { 6113 switch (phase) { 6114 case SPPP_PHASE_DEAD: return "dead"; 6115 case SPPP_PHASE_ESTABLISH: return "establish"; 6116 case SPPP_PHASE_TERMINATE: return "terminate"; 6117 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 6118 case SPPP_PHASE_NETWORK: return "network"; 6119 } 6120 return "illegal"; 6121 } 6122 6123 static const char * 6124 sppp_proto_name(u_short proto) 6125 { 6126 static char buf[12]; 6127 switch (proto) { 6128 case PPP_LCP: return "lcp"; 6129 case PPP_IPCP: return "ipcp"; 6130 case PPP_PAP: return "pap"; 6131 case PPP_CHAP: return "chap"; 6132 case PPP_IPV6CP: return "ipv6cp"; 6133 } 6134 snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto); 6135 return buf; 6136 } 6137 6138 static void 6139 sppp_print_bytes(const u_char *p, u_short len) 6140 { 6141 addlog(" %02x", *p++); 6142 while (--len > 0) 6143 addlog("-%02x", *p++); 6144 } 6145 6146 static void 6147 sppp_print_string(const char *p, u_short len) 6148 { 6149 u_char c; 6150 6151 while (len-- > 0) { 6152 c = *p++; 6153 /* 6154 * Print only ASCII chars directly. RFC 1994 recommends 6155 * using only them, but we don't rely on it. */ 6156 if (c < ' ' || c > '~') 6157 addlog("\\x%x", c); 6158 else 6159 addlog("%c", c); 6160 } 6161 } 6162 6163 static const char * 6164 sppp_dotted_quad(uint32_t addr) 6165 { 6166 static char s[16]; 6167 snprintf(s, sizeof(s), "%d.%d.%d.%d", 6168 (int)((addr >> 24) & 0xff), 6169 (int)((addr >> 16) & 0xff), 6170 (int)((addr >> 8) & 0xff), 6171 (int)(addr & 0xff)); 6172 return s; 6173 } 6174 6175 /* a dummy, used to drop uninteresting events */ 6176 static void 6177 sppp_null(struct sppp *unused) 6178 { 6179 /* do just nothing */ 6180 } 6181 6182 static void 6183 sppp_tls(const struct cp *cp, struct sppp *sp) 6184 { 6185 6186 /* notify lcp that is lower layer */ 6187 sp->lcp.protos |= (1 << cp->protoidx); 6188 6189 if (sp->scp[IDX_LCP].state == STATE_OPENED) 6190 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_up); 6191 } 6192 6193 static void 6194 sppp_tlf(const struct cp *cp, struct sppp *sp) 6195 { 6196 STDDCL; 6197 6198 if (debug) 6199 log(LOG_DEBUG, "%s: %s tlf\n", ifp->if_xname, cp->name); 6200 6201 /* notify lcp that is lower layer */ 6202 sp->lcp.protos &= ~(1 << cp->protoidx); 6203 6204 /* cleanup */ 6205 if (sp->scp[cp->protoidx].rcr_buf != NULL) { 6206 kmem_free(sp->scp[cp->protoidx].rcr_buf, 6207 sp->scp[cp->protoidx].rcr_blen); 6208 } 6209 6210 sp->scp[cp->protoidx].rcr_buf = NULL; 6211 sp->scp[cp->protoidx].rcr_blen = 0; 6212 sp->scp[cp->protoidx].rcr_rlen = 0; 6213 6214 sppp_lcp_check_and_close(sp); 6215 } 6216 6217 static void 6218 sppp_sca_scn(const struct cp *cp, struct sppp *sp) 6219 { 6220 STDDCL; 6221 u_char rconfid, rlen; 6222 int type; 6223 void *buf; 6224 size_t blen; 6225 6226 rconfid = sp->scp[cp->protoidx].rconfid; 6227 buf = sp->scp[cp->protoidx].rcr_buf; 6228 rlen = sp->scp[cp->protoidx].rcr_rlen; 6229 blen = sp->scp[cp->protoidx].rcr_blen; 6230 6231 sp->scp[cp->protoidx].rcr_buf = NULL; 6232 sp->scp[cp->protoidx].rcr_blen = 0; 6233 6234 switch (sp->scp[cp->protoidx].rcr_type) { 6235 case CP_RCR_ACK: 6236 type = CONF_ACK; 6237 break; 6238 case CP_RCR_REJ: 6239 type = CONF_REJ; 6240 break; 6241 case CP_RCR_NAK: 6242 type = CONF_NAK; 6243 break; 6244 default: 6245 type = -1; 6246 break; 6247 } 6248 6249 sp->scp[cp->protoidx].rcr_type = CP_RCR_NONE; 6250 6251 if (buf != NULL) { 6252 if (rlen > 0 && type != -1) { 6253 if (debug) { 6254 log(LOG_DEBUG, "%s: send %s\n", 6255 ifp->if_xname, sppp_cp_type_name(type)); 6256 } 6257 sppp_cp_send(sp, cp->proto, type, rconfid, rlen, buf); 6258 } 6259 kmem_free(buf, blen); 6260 } 6261 } 6262 6263 static void 6264 sppp_ifdown(struct sppp *sp, void *xcp __unused) 6265 { 6266 6267 SPPP_UNLOCK(sp); 6268 if_down(&sp->pp_if); 6269 IF_PURGE(&sp->pp_cpq); 6270 SPPP_LOCK(sp, RW_WRITER); 6271 } 6272 6273 /* 6274 * This file is large. Tell emacs to highlight it nevertheless. 6275 * 6276 * Local Variables: 6277 * hilit-auto-highlight-maxout: 120000 6278 * End: 6279 */ 6280 6281 /* 6282 * Module glue 6283 */ 6284 MODULE(MODULE_CLASS_MISC, sppp_subr, NULL); 6285 6286 static int 6287 sppp_subr_modcmd(modcmd_t cmd, void *arg) 6288 { 6289 switch (cmd) { 6290 case MODULE_CMD_INIT: 6291 case MODULE_CMD_FINI: 6292 return 0; 6293 case MODULE_CMD_STAT: 6294 case MODULE_CMD_AUTOUNLOAD: 6295 default: 6296 return ENOTTY; 6297 } 6298 } 6299 6300 static void 6301 sppp_notify_up(struct sppp *sp) 6302 { 6303 6304 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_up); 6305 } 6306 6307 static void 6308 sppp_notify_down(struct sppp *sp) 6309 { 6310 6311 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_down); 6312 } 6313 6314 static void 6315 sppp_notify_tls_wlocked(struct sppp *sp) 6316 { 6317 6318 KASSERT(SPPP_WLOCKED(sp)); 6319 6320 if (!sp->pp_tls) 6321 return; 6322 6323 SPPP_UNLOCK(sp); 6324 sp->pp_tls(sp); 6325 SPPP_LOCK(sp, RW_WRITER); 6326 } 6327 6328 static void 6329 sppp_notify_tlf_wlocked(struct sppp *sp) 6330 { 6331 6332 KASSERT(SPPP_WLOCKED(sp)); 6333 6334 if (!sp->pp_tlf) 6335 return; 6336 6337 SPPP_UNLOCK(sp); 6338 sp->pp_tlf(sp); 6339 SPPP_LOCK(sp, RW_WRITER); 6340 } 6341 6342 static void 6343 sppp_notify_con(struct sppp *sp) 6344 { 6345 6346 if (!sp->pp_con) 6347 return; 6348 6349 sp->pp_con(sp); 6350 } 6351 6352 #ifdef INET6 6353 static void 6354 sppp_notify_con_wlocked(struct sppp *sp) 6355 { 6356 6357 KASSERT(SPPP_WLOCKED(sp)); 6358 6359 SPPP_UNLOCK(sp); 6360 sppp_notify_con(sp); 6361 SPPP_LOCK(sp, RW_WRITER); 6362 6363 } 6364 #endif 6365 6366 static void 6367 sppp_notify_chg_wlocked(struct sppp *sp) 6368 { 6369 6370 KASSERT(SPPP_WLOCKED(sp)); 6371 6372 if (!sp->pp_chg) 6373 return; 6374 6375 SPPP_UNLOCK(sp); 6376 sp->pp_chg(sp, sp->pp_phase); 6377 SPPP_LOCK(sp, RW_WRITER); 6378 } 6379 6380 static void 6381 sppp_wq_work(struct work *wk, void *xsp) 6382 { 6383 struct sppp *sp; 6384 struct sppp_work *work; 6385 6386 sp = xsp; 6387 work = container_of(wk, struct sppp_work, work); 6388 atomic_cas_uint(&work->state, SPPP_WK_BUSY, SPPP_WK_FREE); 6389 6390 SPPP_LOCK(sp, RW_WRITER); 6391 work->func(sp, work->arg); 6392 SPPP_UNLOCK(sp); 6393 } 6394 6395 static struct workqueue * 6396 sppp_wq_create(struct sppp *sp, const char *xnamebuf, pri_t prio, int ipl, int flags) 6397 { 6398 struct workqueue *wq; 6399 int error; 6400 6401 error = workqueue_create(&wq, xnamebuf, sppp_wq_work, 6402 (void *)sp, prio, ipl, flags); 6403 if (error) { 6404 panic("%s: workqueue_create failed [%s, %d]\n", 6405 sp->pp_if.if_xname, xnamebuf, error); 6406 } 6407 6408 return wq; 6409 } 6410 6411 static void 6412 sppp_wq_destroy(struct sppp *sp __unused, struct workqueue *wq) 6413 { 6414 6415 workqueue_destroy(wq); 6416 } 6417 6418 static void 6419 sppp_wq_set(struct sppp_work *work, 6420 void (*func)(struct sppp *, void *), void *arg) 6421 { 6422 6423 work->func = func; 6424 work->arg = arg; 6425 } 6426 6427 static void 6428 sppp_wq_add(struct workqueue *wq, struct sppp_work *work) 6429 { 6430 6431 if (atomic_cas_uint(&work->state, SPPP_WK_FREE, SPPP_WK_BUSY) 6432 != SPPP_WK_FREE) 6433 return; 6434 6435 KASSERT(work->func != NULL); 6436 kpreempt_disable(); 6437 workqueue_enqueue(wq, &work->work, NULL); 6438 kpreempt_enable(); 6439 } 6440 static void 6441 sppp_wq_wait(struct workqueue *wq, struct sppp_work *work) 6442 { 6443 6444 atomic_swap_uint(&work->state, SPPP_WK_UNAVAIL); 6445 workqueue_wait(wq, &work->work); 6446 } 6447
Indexes created Fri Sep 26 08:10:20 GMT 2025