if_spppsubr.c revision 1.229
1 /* $NetBSD: if_spppsubr.c,v 1.229 2021/05/06 02:05:09 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 1.229 2021/05/06 02:05:09 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 enum { 189 STATE_INITIAL = SPPP_STATE_INITIAL, 190 STATE_STARTING = SPPP_STATE_STARTING, 191 STATE_CLOSED = SPPP_STATE_CLOSED, 192 STATE_STOPPED = SPPP_STATE_STOPPED, 193 STATE_CLOSING = SPPP_STATE_CLOSING, 194 STATE_STOPPING = SPPP_STATE_STOPPING, 195 STATE_REQ_SENT = SPPP_STATE_REQ_SENT, 196 STATE_ACK_RCVD = SPPP_STATE_ACK_RCVD, 197 STATE_ACK_SENT = SPPP_STATE_ACK_SENT, 198 STATE_OPENED = SPPP_STATE_OPENED, 199 }; 200 201 enum cp_rcr_type { 202 CP_RCR_NONE = 0, /* initial value */ 203 CP_RCR_ACK, /* RCR+ */ 204 CP_RCR_NAK, /* RCR- */ 205 CP_RCR_REJ, /* RCR- */ 206 CP_RCR_DROP, /* DROP message */ 207 CP_RCR_ERR, /* internal error */ 208 }; 209 210 struct ppp_header { 211 uint8_t address; 212 uint8_t control; 213 uint16_t protocol; 214 } __packed; 215 #define PPP_HEADER_LEN sizeof (struct ppp_header) 216 217 struct lcp_header { 218 uint8_t type; 219 uint8_t ident; 220 uint16_t len; 221 } __packed; 222 #define LCP_HEADER_LEN sizeof (struct lcp_header) 223 224 struct cisco_packet { 225 uint32_t type; 226 uint32_t par1; 227 uint32_t par2; 228 uint16_t rel; 229 uint16_t time0; 230 uint16_t time1; 231 } __packed; 232 #define CISCO_PACKET_LEN 18 233 234 /* 235 * We follow the spelling and capitalization of RFC 1661 here, to make 236 * it easier comparing with the standard. Please refer to this RFC in 237 * case you can't make sense out of these abbreviation; it will also 238 * explain the semantics related to the various events and actions. 239 */ 240 struct cp { 241 u_short proto; /* PPP control protocol number */ 242 u_char protoidx; /* index into state table in struct sppp */ 243 u_char flags; 244 #define CP_LCP 0x01 /* this is the LCP */ 245 #define CP_AUTH 0x02 /* this is an authentication protocol */ 246 #define CP_NCP 0x04 /* this is a NCP */ 247 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 248 const char *name; /* name of this control protocol */ 249 /* event handlers */ 250 void (*Up)(struct sppp *, void *); 251 void (*Down)(struct sppp *, void *); 252 void (*Open)(struct sppp *, void *); 253 void (*Close)(struct sppp *, void *); 254 void (*TO)(struct sppp *, void *); 255 /* actions */ 256 void (*tlu)(struct sppp *); 257 void (*tld)(struct sppp *); 258 void (*tls)(const struct cp *, struct sppp *); 259 void (*tlf)(const struct cp *, struct sppp *); 260 void (*scr)(struct sppp *); 261 void (*screply)(const struct cp *, struct sppp *, u_char, 262 uint8_t, size_t, void *); 263 264 /* message parser */ 265 enum cp_rcr_type 266 (*parse_confreq)(struct sppp *, struct lcp_header *, int, 267 uint8_t **, size_t *, size_t *); 268 void (*parse_confrej)(struct sppp *, struct lcp_header *, int); 269 void (*parse_confnak)(struct sppp *, struct lcp_header *, int); 270 }; 271 272 enum auth_role { 273 SPPP_AUTH_NOROLE = 0, 274 SPPP_AUTH_SERV = __BIT(0), 275 SPPP_AUTH_PEER = __BIT(1), 276 }; 277 278 static struct sppp *spppq; 279 static kmutex_t *spppq_lock = NULL; 280 static callout_t keepalive_ch; 281 282 #define SPPPQ_LOCK() if (spppq_lock) \ 283 mutex_enter(spppq_lock); 284 #define SPPPQ_UNLOCK() if (spppq_lock) \ 285 mutex_exit(spppq_lock); 286 287 #define SPPP_LOCK(_sp, _op) rw_enter(&(_sp)->pp_lock, (_op)) 288 #define SPPP_UNLOCK(_sp) rw_exit(&(_sp)->pp_lock) 289 #define SPPP_WLOCKED(_sp) rw_write_held(&(_sp)->pp_lock) 290 #define SPPP_UPGRADE(_sp) do{ \ 291 SPPP_UNLOCK(_sp); \ 292 SPPP_LOCK(_sp, RW_WRITER); \ 293 }while (0) 294 #define SPPP_DOWNGRADE(_sp) rw_downgrade(&(_sp)->pp_lock) 295 #define SPPP_WQ_SET(_wk, _func, _arg) \ 296 sppp_wq_set((_wk), (_func), __UNCONST((_arg))) 297 298 #ifdef INET 299 #ifndef SPPPSUBR_MPSAFE 300 /* 301 * The following disgusting hack gets around the problem that IP TOS 302 * can't be set yet. We want to put "interactive" traffic on a high 303 * priority queue. To decide if traffic is interactive, we check that 304 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 305 * 306 * XXX is this really still necessary? - joerg - 307 */ 308 static u_short interactive_ports[8] = { 309 0, 513, 0, 0, 310 0, 21, 0, 23, 311 }; 312 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 313 #endif /* SPPPSUBR_MPSAFE */ 314 #endif 315 316 /* almost every function needs these */ 317 #define STDDCL \ 318 struct ifnet *ifp = &sp->pp_if; \ 319 int debug = ifp->if_flags & IFF_DEBUG 320 321 static int sppp_output(struct ifnet *, struct mbuf *, 322 const struct sockaddr *, const struct rtentry *); 323 324 static void sppp_cisco_send(struct sppp *, int, int32_t, int32_t); 325 static void sppp_cisco_input(struct sppp *, struct mbuf *); 326 327 static void sppp_cp_init(const struct cp *, struct sppp *); 328 static void sppp_cp_fini(const struct cp *, struct sppp *); 329 static void sppp_cp_input(const struct cp *, struct sppp *, 330 struct mbuf *); 331 static void sppp_cp_input(const struct cp *, struct sppp *, 332 struct mbuf *); 333 static void sppp_cp_send(struct sppp *, u_short, u_char, 334 u_char, u_short, void *); 335 /* static void sppp_cp_timeout(void *arg); */ 336 static void sppp_cp_change_state(const struct cp *, struct sppp *, int); 337 static struct workqueue * 338 sppp_wq_create(struct sppp *, const char *, pri_t, int, int); 339 static void sppp_wq_destroy(struct sppp *, struct workqueue *); 340 static void sppp_wq_set(struct sppp_work *, 341 void (*)(struct sppp *, void *), void *); 342 static void sppp_wq_add(struct workqueue *, struct sppp_work *); 343 static void sppp_wq_wait(struct workqueue *, struct sppp_work *); 344 static void sppp_cp_to_lcp(void *); 345 static void sppp_cp_to_ipcp(void *); 346 static void sppp_cp_to_ipv6cp(void *); 347 static void sppp_auth_send(const struct cp *, struct sppp *, 348 unsigned int, unsigned int, ...); 349 static int sppp_auth_role(const struct cp *, struct sppp *); 350 static void sppp_auth_to_event(struct sppp *, void *); 351 static void sppp_auth_screply(const struct cp *, struct sppp *, 352 u_char, uint8_t, size_t, void *); 353 static void sppp_up_event(struct sppp *, void *); 354 static void sppp_down_event(struct sppp *, void *); 355 static void sppp_open_event(struct sppp *, void *); 356 static void sppp_close_event(struct sppp *, void *); 357 static void sppp_to_event(struct sppp *, void *); 358 static void sppp_rcr_event(struct sppp *, void *); 359 static void sppp_rca_event(struct sppp *, void *); 360 static void sppp_rcn_event(struct sppp *, void *); 361 static void sppp_rtr_event(struct sppp *, void *); 362 static void sppp_rta_event(struct sppp *, void *); 363 static void sppp_rxj_event(struct sppp *, void *); 364 365 static void sppp_null(struct sppp *); 366 static void sppp_tls(const struct cp *, struct sppp *); 367 static void sppp_tlf(const struct cp *, struct sppp *); 368 static void sppp_screply(const struct cp *, struct sppp *, 369 u_char, uint8_t, size_t, void *); 370 static void sppp_ifdown(struct sppp *, void *); 371 372 static void sppp_lcp_init(struct sppp *); 373 static void sppp_lcp_up(struct sppp *, void *); 374 static void sppp_lcp_down(struct sppp *, void *); 375 static void sppp_lcp_open(struct sppp *, void *); 376 static enum cp_rcr_type 377 sppp_lcp_confreq(struct sppp *, struct lcp_header *, int, 378 uint8_t **, size_t *, size_t *); 379 static void sppp_lcp_confrej(struct sppp *, struct lcp_header *, int); 380 static void sppp_lcp_confnak(struct sppp *, struct lcp_header *, int); 381 static void sppp_lcp_tlu(struct sppp *); 382 static void sppp_lcp_tld(struct sppp *); 383 static void sppp_lcp_tls(const struct cp *, struct sppp *); 384 static void sppp_lcp_tlf(const struct cp *, struct sppp *); 385 static void sppp_lcp_scr(struct sppp *); 386 static void sppp_lcp_check_and_close(struct sppp *); 387 static int sppp_cp_check(struct sppp *, u_char); 388 389 static void sppp_ipcp_init(struct sppp *); 390 static void sppp_ipcp_open(struct sppp *, void *); 391 static void sppp_ipcp_close(struct sppp *, void *); 392 static enum cp_rcr_type 393 sppp_ipcp_confreq(struct sppp *, struct lcp_header *, int, 394 uint8_t **, size_t *, size_t *); 395 static void sppp_ipcp_confrej(struct sppp *, struct lcp_header *, int); 396 static void sppp_ipcp_confnak(struct sppp *, struct lcp_header *, int); 397 static void sppp_ipcp_tlu(struct sppp *); 398 static void sppp_ipcp_scr(struct sppp *); 399 400 static void sppp_ipv6cp_init(struct sppp *); 401 static void sppp_ipv6cp_open(struct sppp *, void *); 402 static enum cp_rcr_type 403 sppp_ipv6cp_confreq(struct sppp *, struct lcp_header *, int, 404 uint8_t **, size_t *, size_t *); 405 static void sppp_ipv6cp_confrej(struct sppp *, struct lcp_header *, int); 406 static void sppp_ipv6cp_confnak(struct sppp *, struct lcp_header *, int); 407 static void sppp_ipv6cp_tlu(struct sppp *); 408 static void sppp_ipv6cp_scr(struct sppp *); 409 410 static void sppp_pap_input(struct sppp *, struct mbuf *); 411 static void sppp_pap_init(struct sppp *); 412 static void sppp_pap_tlu(struct sppp *); 413 static void sppp_pap_scr(struct sppp *); 414 static void sppp_pap_scr(struct sppp *); 415 416 static void sppp_chap_input(struct sppp *, struct mbuf *); 417 static void sppp_chap_init(struct sppp *); 418 static void sppp_chap_open(struct sppp *, void *); 419 static void sppp_chap_tlu(struct sppp *); 420 static void sppp_chap_scr(struct sppp *); 421 static void sppp_chap_rcv_challenge_event(struct sppp *, void *); 422 423 static const char *sppp_auth_type_name(u_short, u_char); 424 static const char *sppp_cp_type_name(u_char); 425 static const char *sppp_dotted_quad(uint32_t); 426 static const char *sppp_ipcp_opt_name(u_char); 427 #ifdef INET6 428 static const char *sppp_ipv6cp_opt_name(u_char); 429 #endif 430 static const char *sppp_lcp_opt_name(u_char); 431 static const char *sppp_phase_name(int); 432 static const char *sppp_proto_name(u_short); 433 static const char *sppp_state_name(int); 434 static int sppp_params(struct sppp *, u_long, void *); 435 #ifdef INET 436 static void sppp_get_ip_addrs(struct sppp *, uint32_t *, uint32_t *, uint32_t *); 437 static void sppp_set_ip_addrs(struct sppp *); 438 static void sppp_clear_ip_addrs(struct sppp *); 439 #endif 440 static void sppp_keepalive(void *); 441 static void sppp_phase_network(struct sppp *); 442 static void sppp_print_bytes(const u_char *, u_short); 443 static void sppp_print_string(const char *, u_short); 444 #ifdef INET6 445 static void sppp_get_ip6_addrs(struct sppp *, struct in6_addr *, 446 struct in6_addr *, struct in6_addr *); 447 #ifdef IPV6CP_MYIFID_DYN 448 static void sppp_set_ip6_addr(struct sppp *, const struct in6_addr *); 449 static void sppp_gen_ip6_addr(struct sppp *, const struct in6_addr *); 450 #endif 451 static void sppp_suggest_ip6_addr(struct sppp *, struct in6_addr *); 452 #endif 453 454 static void sppp_notify_up(struct sppp *); 455 static void sppp_notify_down(struct sppp *); 456 static void sppp_notify_tls_wlocked(struct sppp *); 457 static void sppp_notify_tlf_wlocked(struct sppp *); 458 #ifdef INET6 459 static void sppp_notify_con_wlocked(struct sppp *); 460 #endif 461 static void sppp_notify_con(struct sppp *); 462 463 static void sppp_notify_chg_wlocked(struct sppp *); 464 465 /* our control protocol descriptors */ 466 static const struct cp lcp = { 467 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 468 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, 469 sppp_close_event, sppp_to_event, 470 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, 471 sppp_lcp_tlf, sppp_lcp_scr, sppp_screply, 472 sppp_lcp_confreq, sppp_lcp_confrej, sppp_lcp_confnak 473 }; 474 475 static const struct cp ipcp = { 476 PPP_IPCP, IDX_IPCP, 477 #ifdef INET 478 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 479 #else 480 0, 481 #endif 482 "ipcp", 483 sppp_up_event, sppp_down_event, sppp_ipcp_open, 484 sppp_ipcp_close, sppp_to_event, 485 sppp_ipcp_tlu, sppp_null, sppp_tls, 486 sppp_tlf, sppp_ipcp_scr, sppp_screply, 487 sppp_ipcp_confreq, sppp_ipcp_confrej, sppp_ipcp_confnak, 488 }; 489 490 static const struct cp ipv6cp = { 491 PPP_IPV6CP, IDX_IPV6CP, 492 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 493 CP_NCP, 494 #else 495 0, 496 #endif 497 "ipv6cp", 498 sppp_up_event, sppp_down_event, sppp_ipv6cp_open, 499 sppp_close_event, sppp_to_event, 500 sppp_ipv6cp_tlu, sppp_null, sppp_tls, 501 sppp_tlf, sppp_ipv6cp_scr, sppp_screply, 502 sppp_ipv6cp_confreq, sppp_ipv6cp_confrej, sppp_ipv6cp_confnak, 503 }; 504 505 static const struct cp pap = { 506 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 507 sppp_up_event, sppp_down_event, sppp_open_event, 508 sppp_close_event, sppp_to_event, 509 sppp_pap_tlu, sppp_null, sppp_tls, sppp_tlf, 510 sppp_pap_scr, sppp_auth_screply, 511 NULL, NULL, NULL 512 }; 513 514 static const struct cp chap = { 515 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 516 sppp_up_event, sppp_down_event, sppp_chap_open, 517 sppp_close_event, sppp_auth_to_event, 518 sppp_chap_tlu, sppp_null, sppp_tls, sppp_tlf, 519 sppp_chap_scr, sppp_auth_screply, 520 NULL, NULL, NULL 521 }; 522 523 static const struct cp *cps[IDX_COUNT] = { 524 &lcp, /* IDX_LCP */ 525 &ipcp, /* IDX_IPCP */ 526 &ipv6cp, /* IDX_IPV6CP */ 527 &pap, /* IDX_PAP */ 528 &chap, /* IDX_CHAP */ 529 }; 530 531 static void 532 sppp_change_phase(struct sppp *sp, int phase) 533 { 534 STDDCL; 535 536 KASSERT(SPPP_WLOCKED(sp)); 537 538 if (sp->pp_phase == phase) 539 return; 540 541 sp->pp_phase = phase; 542 543 if (phase == SPPP_PHASE_NETWORK) 544 if_link_state_change(ifp, LINK_STATE_UP); 545 else 546 if_link_state_change(ifp, LINK_STATE_DOWN); 547 548 if (debug) 549 { 550 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 551 sppp_phase_name(sp->pp_phase)); 552 } 553 } 554 555 /* 556 * Exported functions, comprising our interface to the lower layer. 557 */ 558 559 /* 560 * Process the received packet. 561 */ 562 void 563 sppp_input(struct ifnet *ifp, struct mbuf *m) 564 { 565 struct ppp_header *h = NULL; 566 pktqueue_t *pktq = NULL; 567 struct ifqueue *inq = NULL; 568 uint16_t protocol; 569 struct sppp *sp = (struct sppp *)ifp; 570 int debug = ifp->if_flags & IFF_DEBUG; 571 int isr = 0; 572 573 SPPP_LOCK(sp, RW_READER); 574 575 if (ifp->if_flags & IFF_UP) { 576 /* Count received bytes, add hardware framing */ 577 if_statadd(ifp, if_ibytes, m->m_pkthdr.len + sp->pp_framebytes); 578 /* Note time of last receive */ 579 sp->pp_last_receive = time_uptime; 580 } 581 582 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 583 /* Too small packet, drop it. */ 584 if (debug) 585 log(LOG_DEBUG, 586 "%s: input packet is too small, %d bytes\n", 587 ifp->if_xname, m->m_pkthdr.len); 588 drop: 589 if_statadd2(ifp, if_ierrors, 1, if_iqdrops, 1); 590 m_freem(m); 591 SPPP_UNLOCK(sp); 592 return; 593 } 594 595 if (sp->pp_flags & PP_NOFRAMING) { 596 memcpy(&protocol, mtod(m, void *), 2); 597 protocol = ntohs(protocol); 598 m_adj(m, 2); 599 } else { 600 601 /* Get PPP header. */ 602 h = mtod(m, struct ppp_header *); 603 m_adj(m, PPP_HEADER_LEN); 604 605 switch (h->address) { 606 case PPP_ALLSTATIONS: 607 if (h->control != PPP_UI) 608 goto invalid; 609 if (sp->pp_flags & PP_CISCO) { 610 if (debug) 611 log(LOG_DEBUG, 612 "%s: PPP packet in Cisco mode " 613 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 614 ifp->if_xname, 615 h->address, h->control, ntohs(h->protocol)); 616 goto drop; 617 } 618 break; 619 case CISCO_MULTICAST: 620 case CISCO_UNICAST: 621 /* Don't check the control field here (RFC 1547). */ 622 if (! (sp->pp_flags & PP_CISCO)) { 623 if (debug) 624 log(LOG_DEBUG, 625 "%s: Cisco packet in PPP mode " 626 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 627 ifp->if_xname, 628 h->address, h->control, ntohs(h->protocol)); 629 goto drop; 630 } 631 switch (ntohs(h->protocol)) { 632 default: 633 if_statinc(ifp, if_noproto); 634 goto invalid; 635 case CISCO_KEEPALIVE: 636 SPPP_UNLOCK(sp); 637 sppp_cisco_input((struct sppp *) ifp, m); 638 m_freem(m); 639 return; 640 #ifdef INET 641 case ETHERTYPE_IP: 642 pktq = ip_pktq; 643 break; 644 #endif 645 #ifdef INET6 646 case ETHERTYPE_IPV6: 647 pktq = ip6_pktq; 648 break; 649 #endif 650 } 651 goto queue_pkt; 652 default: /* Invalid PPP packet. */ 653 invalid: 654 if (debug) 655 log(LOG_DEBUG, 656 "%s: invalid input packet " 657 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 658 ifp->if_xname, 659 h->address, h->control, ntohs(h->protocol)); 660 goto drop; 661 } 662 protocol = ntohs(h->protocol); 663 } 664 665 switch (protocol) { 666 default: 667 if (sp->scp[IDX_LCP].state == STATE_OPENED) { 668 uint16_t prot = htons(protocol); 669 670 SPPP_UPGRADE(sp); 671 sppp_cp_send(sp, PPP_LCP, PROTO_REJ, 672 ++sp->scp[IDX_LCP].seq, m->m_pkthdr.len + 2, 673 &prot); 674 SPPP_DOWNGRADE(sp); 675 } 676 if (debug) 677 log(LOG_DEBUG, 678 "%s: invalid input protocol " 679 "<proto=0x%x>\n", ifp->if_xname, ntohs(protocol)); 680 if_statinc(ifp, if_noproto); 681 goto drop; 682 case PPP_LCP: 683 SPPP_UNLOCK(sp); 684 sppp_cp_input(&lcp, sp, m); 685 /* already m_freem(m) */ 686 return; 687 case PPP_PAP: 688 SPPP_UNLOCK(sp); 689 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 690 sppp_pap_input(sp, m); 691 } 692 m_freem(m); 693 return; 694 case PPP_CHAP: 695 SPPP_UNLOCK(sp); 696 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 697 sppp_chap_input(sp, m); 698 } 699 m_freem(m); 700 return; 701 #ifdef INET 702 case PPP_IPCP: 703 SPPP_UNLOCK(sp); 704 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 705 sppp_cp_input(&ipcp, sp, m); 706 /* already m_freem(m) */ 707 } else { 708 m_freem(m); 709 } 710 return; 711 case PPP_IP: 712 if (sp->scp[IDX_IPCP].state == STATE_OPENED) { 713 sp->pp_last_activity = time_uptime; 714 pktq = ip_pktq; 715 } 716 break; 717 #endif 718 #ifdef INET6 719 case PPP_IPV6CP: 720 SPPP_UNLOCK(sp); 721 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 722 sppp_cp_input(&ipv6cp, sp, m); 723 /* already m_freem(m) */ 724 } else { 725 m_freem(m); 726 } 727 return; 728 729 case PPP_IPV6: 730 if (sp->scp[IDX_IPV6CP].state == STATE_OPENED) { 731 sp->pp_last_activity = time_uptime; 732 pktq = ip6_pktq; 733 } 734 break; 735 #endif 736 } 737 738 queue_pkt: 739 if ((ifp->if_flags & IFF_UP) == 0 || (!inq && !pktq)) { 740 goto drop; 741 } 742 743 /* Check queue. */ 744 if (__predict_true(pktq)) { 745 if (__predict_false(!pktq_enqueue(pktq, m, 0))) { 746 goto drop; 747 } 748 SPPP_UNLOCK(sp); 749 return; 750 } 751 752 SPPP_UNLOCK(sp); 753 754 IFQ_LOCK(inq); 755 if (IF_QFULL(inq)) { 756 /* Queue overflow. */ 757 IF_DROP(inq); 758 IFQ_UNLOCK(inq); 759 if (debug) 760 log(LOG_DEBUG, "%s: protocol queue overflow\n", 761 ifp->if_xname); 762 763 SPPP_LOCK(sp, RW_READER); 764 goto drop; 765 } 766 IF_ENQUEUE(inq, m); 767 IFQ_UNLOCK(inq); 768 schednetisr(isr); 769 } 770 771 /* 772 * Enqueue transmit packet. 773 */ 774 static int 775 sppp_output(struct ifnet *ifp, struct mbuf *m, 776 const struct sockaddr *dst, const struct rtentry *rt) 777 { 778 struct sppp *sp = (struct sppp *) ifp; 779 struct ppp_header *h = NULL; 780 #ifndef SPPPSUBR_MPSAFE 781 struct ifqueue *ifq = NULL; /* XXX */ 782 #endif 783 int s, error = 0; 784 uint16_t protocol; 785 size_t pktlen; 786 787 s = splnet(); 788 SPPP_LOCK(sp, RW_READER); 789 790 sp->pp_last_activity = time_uptime; 791 792 if ((ifp->if_flags & IFF_UP) == 0 || 793 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 794 SPPP_UNLOCK(sp); 795 splx(s); 796 797 m_freem(m); 798 799 return (ENETDOWN); 800 } 801 802 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 803 /* 804 * Interface is not yet running, but auto-dial. Need 805 * to start LCP for it. 806 */ 807 ifp->if_flags |= IFF_RUNNING; 808 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 809 } 810 811 /* 812 * If the queueing discipline needs packet classification, 813 * do it before prepending link headers. 814 */ 815 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family); 816 817 #ifdef INET 818 if (dst->sa_family == AF_INET) { 819 struct ip *ip = NULL; 820 #ifndef SPPPSUBR_MPSAFE 821 struct tcphdr *th = NULL; 822 #endif 823 824 if (m->m_len >= sizeof(struct ip)) { 825 ip = mtod(m, struct ip *); 826 #ifndef SPPPSUBR_MPSAFE 827 if (ip->ip_p == IPPROTO_TCP && 828 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + 829 sizeof(struct tcphdr)) { 830 th = (struct tcphdr *) 831 ((char *)ip + (ip->ip_hl << 2)); 832 } 833 #endif 834 } else 835 ip = NULL; 836 837 /* 838 * When using dynamic local IP address assignment by using 839 * 0.0.0.0 as a local address, the first TCP session will 840 * not connect because the local TCP checksum is computed 841 * using 0.0.0.0 which will later become our real IP address 842 * so the TCP checksum computed at the remote end will 843 * become invalid. So we 844 * - don't let packets with src ip addr 0 thru 845 * - we flag TCP packets with src ip 0 as an error 846 */ 847 if (ip && ip->ip_src.s_addr == INADDR_ANY) { 848 uint8_t proto = ip->ip_p; 849 850 SPPP_UNLOCK(sp); 851 splx(s); 852 853 m_freem(m); 854 if (proto == IPPROTO_TCP) 855 return (EADDRNOTAVAIL); 856 else 857 return (0); 858 } 859 860 #ifndef SPPPSUBR_MPSAFE 861 /* 862 * Put low delay, telnet, rlogin and ftp control packets 863 * in front of the queue. 864 */ 865 if (!IF_QFULL(&sp->pp_fastq) && 866 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 867 (th && (INTERACTIVE(ntohs(th->th_sport)) || 868 INTERACTIVE(ntohs(th->th_dport)))))) 869 ifq = &sp->pp_fastq; 870 #endif /* !SPPPSUBR_MPSAFE */ 871 } 872 #endif 873 874 #ifdef INET6 875 if (dst->sa_family == AF_INET6) { 876 /* XXX do something tricky here? */ 877 } 878 #endif 879 880 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 881 /* 882 * Prepend general data packet PPP header. For now, IP only. 883 */ 884 M_PREPEND(m, PPP_HEADER_LEN, M_DONTWAIT); 885 if (! m) { 886 if (ifp->if_flags & IFF_DEBUG) 887 log(LOG_DEBUG, "%s: no memory for transmit header\n", 888 ifp->if_xname); 889 if_statinc(ifp, if_oerrors); 890 SPPP_UNLOCK(sp); 891 splx(s); 892 return (ENOBUFS); 893 } 894 /* 895 * May want to check size of packet 896 * (albeit due to the implementation it's always enough) 897 */ 898 h = mtod(m, struct ppp_header *); 899 if (sp->pp_flags & PP_CISCO) { 900 h->address = CISCO_UNICAST; /* unicast address */ 901 h->control = 0; 902 } else { 903 h->address = PPP_ALLSTATIONS; /* broadcast address */ 904 h->control = PPP_UI; /* Unnumbered Info */ 905 } 906 } 907 908 switch (dst->sa_family) { 909 #ifdef INET 910 case AF_INET: /* Internet Protocol */ 911 if (sp->pp_flags & PP_CISCO) 912 protocol = htons(ETHERTYPE_IP); 913 else { 914 /* 915 * Don't choke with an ENETDOWN early. It's 916 * possible that we just started dialing out, 917 * so don't drop the packet immediately. If 918 * we notice that we run out of buffer space 919 * below, we will however remember that we are 920 * not ready to carry IP packets, and return 921 * ENETDOWN, as opposed to ENOBUFS. 922 */ 923 protocol = htons(PPP_IP); 924 if (sp->scp[IDX_IPCP].state != STATE_OPENED) 925 error = ENETDOWN; 926 } 927 break; 928 #endif 929 #ifdef INET6 930 case AF_INET6: /* Internet Protocol version 6 */ 931 if (sp->pp_flags & PP_CISCO) 932 protocol = htons(ETHERTYPE_IPV6); 933 else { 934 /* 935 * Don't choke with an ENETDOWN early. It's 936 * possible that we just started dialing out, 937 * so don't drop the packet immediately. If 938 * we notice that we run out of buffer space 939 * below, we will however remember that we are 940 * not ready to carry IP packets, and return 941 * ENETDOWN, as opposed to ENOBUFS. 942 */ 943 protocol = htons(PPP_IPV6); 944 if (sp->scp[IDX_IPV6CP].state != STATE_OPENED) 945 error = ENETDOWN; 946 } 947 break; 948 #endif 949 default: 950 m_freem(m); 951 if_statinc(ifp, if_oerrors); 952 SPPP_UNLOCK(sp); 953 splx(s); 954 return (EAFNOSUPPORT); 955 } 956 957 if (sp->pp_flags & PP_NOFRAMING) { 958 M_PREPEND(m, 2, M_DONTWAIT); 959 if (m == NULL) { 960 if (ifp->if_flags & IFF_DEBUG) 961 log(LOG_DEBUG, "%s: no memory for transmit header\n", 962 ifp->if_xname); 963 if_statinc(ifp, if_oerrors); 964 SPPP_UNLOCK(sp); 965 splx(s); 966 return (ENOBUFS); 967 } 968 *mtod(m, uint16_t *) = protocol; 969 } else { 970 h->protocol = protocol; 971 } 972 973 pktlen = m->m_pkthdr.len; 974 #ifdef SPPPSUBR_MPSAFE 975 SPPP_UNLOCK(sp); 976 error = if_transmit_lock(ifp, m); 977 SPPP_LOCK(sp, RW_READER); 978 if (error == 0) 979 if_statadd(ifp, if_obytes, pktlen + sp->pp_framebytes); 980 #else /* !SPPPSUBR_MPSAFE */ 981 error = ifq_enqueue2(ifp, ifq, m); 982 983 if (error == 0) { 984 /* 985 * Count output packets and bytes. 986 * The packet length includes header + additional hardware 987 * framing according to RFC 1333. 988 */ 989 if (!(ifp->if_flags & IFF_OACTIVE)) { 990 SPPP_UNLOCK(sp); 991 if_start_lock(ifp); 992 SPPP_LOCK(sp, RW_READER); 993 } 994 if_statadd(ifp, if_obytes, pktlen + sp->pp_framebytes); 995 } 996 #endif /* !SPPPSUBR_MPSAFE */ 997 SPPP_UNLOCK(sp); 998 splx(s); 999 return error; 1000 } 1001 1002 void 1003 sppp_attach(struct ifnet *ifp) 1004 { 1005 struct sppp *sp = (struct sppp *) ifp; 1006 char xnamebuf[MAXCOMLEN]; 1007 1008 /* Initialize keepalive handler. */ 1009 if (! spppq) { 1010 callout_init(&keepalive_ch, CALLOUT_MPSAFE); 1011 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 1012 } 1013 1014 if (! spppq_lock) 1015 spppq_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_SOFTNET); 1016 1017 sp->pp_if.if_type = IFT_PPP; 1018 sp->pp_if.if_output = sppp_output; 1019 sp->pp_fastq.ifq_maxlen = 32; 1020 sp->pp_cpq.ifq_maxlen = 20; 1021 sp->pp_loopcnt = 0; 1022 sp->pp_alivecnt = 0; 1023 sp->pp_last_activity = 0; 1024 sp->pp_last_receive = 0; 1025 sp->pp_maxalive = DEFAULT_MAXALIVECNT; 1026 sp->pp_max_noreceive = DEFAULT_NORECV_TIME; 1027 sp->pp_idle_timeout = 0; 1028 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 1029 sp->pp_phase = SPPP_PHASE_DEAD; 1030 sp->pp_up = sppp_notify_up; 1031 sp->pp_down = sppp_notify_down; 1032 sppp_wq_set(&sp->work_ifdown, sppp_ifdown, NULL); 1033 memset(sp->scp, 0, sizeof(sp->scp)); 1034 rw_init(&sp->pp_lock); 1035 1036 if_alloc_sadl(ifp); 1037 1038 /* Lets not beat about the bush, we know we're down. */ 1039 ifp->if_link_state = LINK_STATE_DOWN; 1040 1041 snprintf(xnamebuf, sizeof(xnamebuf), "%s.wq_cp", ifp->if_xname); 1042 sp->wq_cp = sppp_wq_create(sp, xnamebuf, 1043 PRI_SOFTNET, IPL_SOFTNET, WQ_MPSAFE); 1044 1045 memset(&sp->myauth, 0, sizeof sp->myauth); 1046 memset(&sp->hisauth, 0, sizeof sp->hisauth); 1047 SPPP_LOCK(sp, RW_WRITER); 1048 sppp_lcp_init(sp); 1049 sppp_ipcp_init(sp); 1050 sppp_ipv6cp_init(sp); 1051 sppp_pap_init(sp); 1052 sppp_chap_init(sp); 1053 SPPP_UNLOCK(sp); 1054 1055 SPPPQ_LOCK(); 1056 /* Insert new entry into the keepalive list. */ 1057 sp->pp_next = spppq; 1058 spppq = sp; 1059 SPPPQ_UNLOCK(); 1060 } 1061 1062 void 1063 sppp_detach(struct ifnet *ifp) 1064 { 1065 struct sppp **q, *p, *sp = (struct sppp *) ifp; 1066 1067 /* Remove the entry from the keepalive list. */ 1068 SPPPQ_LOCK(); 1069 for (q = &spppq; (p = *q); q = &p->pp_next) 1070 if (p == sp) { 1071 *q = p->pp_next; 1072 break; 1073 } 1074 SPPPQ_UNLOCK(); 1075 1076 if (! spppq) { 1077 /* Stop keepalive handler. */ 1078 callout_stop(&keepalive_ch); 1079 mutex_obj_free(spppq_lock); 1080 spppq_lock = NULL; 1081 } 1082 1083 sppp_cp_fini(&lcp, sp); 1084 sppp_cp_fini(&ipcp, sp); 1085 sppp_cp_fini(&pap, sp); 1086 sppp_cp_fini(&chap, sp); 1087 #ifdef INET6 1088 sppp_cp_fini(&ipv6cp, sp); 1089 #endif 1090 sppp_wq_destroy(sp, sp->wq_cp); 1091 1092 /* free authentication info */ 1093 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 1094 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 1095 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 1096 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 1097 rw_destroy(&sp->pp_lock); 1098 } 1099 1100 /* 1101 * Flush the interface output queue. 1102 */ 1103 void 1104 sppp_flush(struct ifnet *ifp) 1105 { 1106 struct sppp *sp = (struct sppp *) ifp; 1107 1108 SPPP_LOCK(sp, RW_WRITER); 1109 IFQ_PURGE(&sp->pp_if.if_snd); 1110 IF_PURGE(&sp->pp_fastq); 1111 IF_PURGE(&sp->pp_cpq); 1112 SPPP_UNLOCK(sp); 1113 } 1114 1115 /* 1116 * Check if the output queue is empty. 1117 */ 1118 int 1119 sppp_isempty(struct ifnet *ifp) 1120 { 1121 struct sppp *sp = (struct sppp *) ifp; 1122 int empty, s; 1123 1124 s = splnet(); 1125 SPPP_LOCK(sp, RW_READER); 1126 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1127 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1128 SPPP_UNLOCK(sp); 1129 splx(s); 1130 return (empty); 1131 } 1132 1133 /* 1134 * Get next packet to send. 1135 */ 1136 struct mbuf * 1137 sppp_dequeue(struct ifnet *ifp) 1138 { 1139 struct sppp *sp = (struct sppp *) ifp; 1140 struct mbuf *m; 1141 int s; 1142 1143 s = splnet(); 1144 SPPP_LOCK(sp, RW_WRITER); 1145 /* 1146 * Process only the control protocol queue until we have at 1147 * least one NCP open. 1148 * 1149 * Do always serve all three queues in Cisco mode. 1150 */ 1151 IF_DEQUEUE(&sp->pp_cpq, m); 1152 if (m == NULL && 1153 (sppp_cp_check(sp, CP_NCP) || (sp->pp_flags & PP_CISCO) != 0)) { 1154 IF_DEQUEUE(&sp->pp_fastq, m); 1155 if (m == NULL) 1156 IFQ_DEQUEUE(&sp->pp_if.if_snd, m); 1157 } 1158 SPPP_UNLOCK(sp); 1159 splx(s); 1160 return m; 1161 } 1162 1163 /* 1164 * Process an ioctl request. Called on low priority level. 1165 */ 1166 int 1167 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1168 { 1169 struct lwp *l = curlwp; /* XXX */ 1170 struct ifreq *ifr = (struct ifreq *) data; 1171 struct ifaddr *ifa = (struct ifaddr *) data; 1172 struct sppp *sp = (struct sppp *) ifp; 1173 int s, error=0, going_up, going_down; 1174 u_short newmode; 1175 u_long lcp_mru; 1176 1177 s = splnet(); 1178 switch (cmd) { 1179 case SIOCINITIFADDR: 1180 ifa->ifa_rtrequest = p2p_rtrequest; 1181 break; 1182 1183 case SIOCSIFFLAGS: 1184 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1185 break; 1186 1187 SPPP_LOCK(sp, RW_WRITER); 1188 going_up = ifp->if_flags & IFF_UP && 1189 (ifp->if_flags & IFF_RUNNING) == 0; 1190 going_down = (ifp->if_flags & IFF_UP) == 0 && 1191 ifp->if_flags & IFF_RUNNING; 1192 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1193 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1194 /* sanity */ 1195 newmode = IFF_PASSIVE; 1196 ifp->if_flags &= ~IFF_AUTO; 1197 } 1198 1199 if (going_up || going_down) { 1200 sp->lcp.reestablish = false; 1201 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 1202 } 1203 if (going_up && newmode == 0) { 1204 /* neither auto-dial nor passive */ 1205 ifp->if_flags |= IFF_RUNNING; 1206 if (!(sp->pp_flags & PP_CISCO)) { 1207 sppp_wq_add(sp->wq_cp, 1208 &sp->scp[IDX_LCP].work_open); 1209 } 1210 } else if (going_down) { 1211 SPPP_UNLOCK(sp); 1212 sppp_flush(ifp); 1213 SPPP_LOCK(sp, RW_WRITER); 1214 1215 ifp->if_flags &= ~IFF_RUNNING; 1216 } 1217 SPPP_UNLOCK(sp); 1218 break; 1219 1220 case SIOCSIFMTU: 1221 if (ifr->ifr_mtu < PPP_MINMRU || 1222 ifr->ifr_mtu > PP_MTU) { 1223 error = EINVAL; 1224 break; 1225 } 1226 1227 error = ifioctl_common(ifp, cmd, data); 1228 if (error == ENETRESET) 1229 error = 0; 1230 1231 SPPP_LOCK(sp, RW_WRITER); 1232 lcp_mru = sp->lcp.mru; 1233 if (ifp->if_mtu < PP_MTU) { 1234 sp->lcp.mru = ifp->if_mtu; 1235 } else { 1236 sp->lcp.mru = PP_MTU; 1237 } 1238 if (lcp_mru != sp->lcp.mru) 1239 SET(sp->lcp.opts, SPPP_LCP_OPT_MRU); 1240 1241 if (sp->scp[IDX_LCP].state == STATE_OPENED && 1242 ifp->if_mtu > sp->lcp.their_mru) { 1243 sp->pp_saved_mtu = ifp->if_mtu; 1244 ifp->if_mtu = sp->lcp.their_mru; 1245 1246 if (ifp->if_flags & IFF_DEBUG) { 1247 log(LOG_DEBUG, 1248 "%s: setting MTU " 1249 "from %"PRIu64" bytes " 1250 "to %"PRIu64" bytes\n", 1251 ifp->if_xname, sp->pp_saved_mtu, 1252 ifp->if_mtu); 1253 } 1254 } 1255 SPPP_UNLOCK(sp); 1256 break; 1257 1258 case SIOCGIFMTU: 1259 if ((error = ifioctl_common(ifp, cmd, data)) == ENETRESET) 1260 error = 0; 1261 break; 1262 case SIOCADDMULTI: 1263 case SIOCDELMULTI: 1264 break; 1265 1266 case SPPPSETAUTHCFG: 1267 case SPPPSETLCPCFG: 1268 case SPPPSETIDLETO: 1269 case SPPPSETAUTHFAILURE: 1270 case SPPPSETDNSOPTS: 1271 case SPPPSETKEEPALIVE: 1272 #if defined(COMPAT_50) || defined(MODULAR) 1273 case __SPPPSETIDLETO50: 1274 case __SPPPSETKEEPALIVE50: 1275 #endif /* COMPAT_50 || MODULAR */ 1276 error = kauth_authorize_network(l->l_cred, 1277 KAUTH_NETWORK_INTERFACE, 1278 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, 1279 NULL); 1280 if (error) 1281 break; 1282 error = sppp_params(sp, cmd, data); 1283 break; 1284 1285 case SPPPGETAUTHCFG: 1286 case SPPPGETLCPCFG: 1287 case SPPPGETAUTHFAILURES: 1288 error = kauth_authorize_network(l->l_cred, 1289 KAUTH_NETWORK_INTERFACE, 1290 KAUTH_REQ_NETWORK_INTERFACE_GETPRIV, ifp, (void *)cmd, 1291 NULL); 1292 if (error) 1293 break; 1294 error = sppp_params(sp, cmd, data); 1295 break; 1296 1297 case SPPPGETSTATUS: 1298 case SPPPGETSTATUSNCP: 1299 case SPPPGETIDLETO: 1300 case SPPPGETDNSOPTS: 1301 case SPPPGETDNSADDRS: 1302 case SPPPGETKEEPALIVE: 1303 #if defined(COMPAT_50) || defined(MODULAR) 1304 case __SPPPGETIDLETO50: 1305 case __SPPPGETKEEPALIVE50: 1306 #endif /* COMPAT_50 || MODULAR */ 1307 case SPPPGETLCPSTATUS: 1308 case SPPPGETIPCPSTATUS: 1309 case SPPPGETIPV6CPSTATUS: 1310 error = sppp_params(sp, cmd, data); 1311 break; 1312 1313 default: 1314 error = ifioctl_common(ifp, cmd, data); 1315 break; 1316 } 1317 splx(s); 1318 return (error); 1319 } 1320 1321 /* 1322 * Cisco framing implementation. 1323 */ 1324 1325 /* 1326 * Handle incoming Cisco keepalive protocol packets. 1327 */ 1328 static void 1329 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1330 { 1331 STDDCL; 1332 struct cisco_packet *h; 1333 #ifdef INET 1334 uint32_t me, mymask = 0; /* XXX: GCC */ 1335 #endif 1336 1337 SPPP_LOCK(sp, RW_WRITER); 1338 1339 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1340 if (debug) 1341 log(LOG_DEBUG, 1342 "%s: cisco invalid packet length: %d bytes\n", 1343 ifp->if_xname, m->m_pkthdr.len); 1344 SPPP_UNLOCK(sp); 1345 return; 1346 } 1347 h = mtod(m, struct cisco_packet *); 1348 if (debug) 1349 log(LOG_DEBUG, 1350 "%s: cisco input: %d bytes " 1351 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1352 ifp->if_xname, m->m_pkthdr.len, 1353 ntohl(h->type), h->par1, h->par2, (u_int)h->rel, 1354 (u_int)h->time0, (u_int)h->time1); 1355 switch (ntohl(h->type)) { 1356 default: 1357 if (debug) 1358 addlog("%s: cisco unknown packet type: 0x%x\n", 1359 ifp->if_xname, ntohl(h->type)); 1360 break; 1361 case CISCO_ADDR_REPLY: 1362 /* Reply on address request, ignore */ 1363 break; 1364 case CISCO_KEEPALIVE_REQ: 1365 sp->pp_alivecnt = 0; 1366 sp->scp[IDX_LCP].rseq = ntohl(h->par1); 1367 if (sp->scp[IDX_LCP].seq == sp->scp[IDX_LCP].rseq) { 1368 /* Local and remote sequence numbers are equal. 1369 * Probably, the line is in loopback mode. */ 1370 if (sp->pp_loopcnt >= LOOPALIVECNT) { 1371 printf ("%s: loopback\n", 1372 ifp->if_xname); 1373 sp->pp_loopcnt = 0; 1374 if (ifp->if_flags & IFF_UP) { 1375 SPPP_UNLOCK(sp); 1376 if_down(ifp); 1377 SPPP_LOCK(sp, RW_WRITER); 1378 1379 IF_PURGE(&sp->pp_cpq); 1380 } 1381 } 1382 ++sp->pp_loopcnt; 1383 1384 /* Generate new local sequence number */ 1385 sp->scp[IDX_LCP].seq = cprng_fast32(); 1386 break; 1387 } 1388 sp->pp_loopcnt = 0; 1389 if (! (ifp->if_flags & IFF_UP) && 1390 (ifp->if_flags & IFF_RUNNING)) { 1391 SPPP_UNLOCK(sp); 1392 if_up(ifp); 1393 SPPP_LOCK(sp, RW_WRITER); 1394 } 1395 break; 1396 case CISCO_ADDR_REQ: 1397 #ifdef INET 1398 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1399 if (me != 0L) 1400 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1401 #endif 1402 break; 1403 } 1404 SPPP_UNLOCK(sp); 1405 } 1406 1407 /* 1408 * Send Cisco keepalive packet. 1409 */ 1410 static void 1411 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1412 { 1413 STDDCL; 1414 struct ppp_header *h; 1415 struct cisco_packet *ch; 1416 struct mbuf *m; 1417 uint32_t t; 1418 1419 KASSERT(SPPP_WLOCKED(sp)); 1420 1421 t = time_uptime * 1000; 1422 MGETHDR(m, M_DONTWAIT, MT_DATA); 1423 if (! m) 1424 return; 1425 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1426 m_reset_rcvif(m); 1427 1428 h = mtod(m, struct ppp_header *); 1429 h->address = CISCO_MULTICAST; 1430 h->control = 0; 1431 h->protocol = htons(CISCO_KEEPALIVE); 1432 1433 ch = (struct cisco_packet *)(h + 1); 1434 ch->type = htonl(type); 1435 ch->par1 = htonl(par1); 1436 ch->par2 = htonl(par2); 1437 ch->rel = -1; 1438 1439 ch->time0 = htons((u_short)(t >> 16)); 1440 ch->time1 = htons((u_short) t); 1441 1442 if (debug) 1443 log(LOG_DEBUG, 1444 "%s: cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1445 ifp->if_xname, ntohl(ch->type), ch->par1, 1446 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1447 (u_int)ch->time1); 1448 1449 if (IF_QFULL(&sp->pp_cpq)) { 1450 IF_DROP(&sp->pp_fastq); 1451 IF_DROP(&ifp->if_snd); 1452 m_freem(m); 1453 if_statinc(ifp, if_oerrors); 1454 return; 1455 } 1456 1457 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 1458 IF_ENQUEUE(&sp->pp_cpq, m); 1459 1460 if (! (ifp->if_flags & IFF_OACTIVE)) { 1461 SPPP_UNLOCK(sp); 1462 if_start_lock(ifp); 1463 SPPP_LOCK(sp, RW_WRITER); 1464 } 1465 } 1466 1467 /* 1468 * PPP protocol implementation. 1469 */ 1470 1471 /* 1472 * Send PPP control protocol packet. 1473 */ 1474 static void 1475 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1476 u_char ident, u_short len, void *data) 1477 { 1478 STDDCL; 1479 struct lcp_header *lh; 1480 struct mbuf *m; 1481 size_t pkthdrlen; 1482 1483 KASSERT(SPPP_WLOCKED(sp)); 1484 1485 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1486 1487 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1488 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1489 MGETHDR(m, M_DONTWAIT, MT_DATA); 1490 if (! m) { 1491 return; 1492 } 1493 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1494 m_reset_rcvif(m); 1495 1496 if (sp->pp_flags & PP_NOFRAMING) { 1497 *mtod(m, uint16_t *) = htons(proto); 1498 lh = (struct lcp_header *)(mtod(m, uint8_t *) + 2); 1499 } else { 1500 struct ppp_header *h; 1501 h = mtod(m, struct ppp_header *); 1502 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1503 h->control = PPP_UI; /* Unnumbered Info */ 1504 h->protocol = htons(proto); /* Link Control Protocol */ 1505 lh = (struct lcp_header *)(h + 1); 1506 } 1507 lh->type = type; 1508 lh->ident = ident; 1509 lh->len = htons(LCP_HEADER_LEN + len); 1510 if (len) 1511 memcpy(lh + 1, data, len); 1512 1513 if (debug) { 1514 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 1515 ifp->if_xname, 1516 sppp_proto_name(proto), 1517 sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len)); 1518 if (len) 1519 sppp_print_bytes((u_char *)(lh + 1), len); 1520 addlog(">\n"); 1521 } 1522 if (IF_QFULL(&sp->pp_cpq)) { 1523 IF_DROP(&sp->pp_fastq); 1524 IF_DROP(&ifp->if_snd); 1525 m_freem(m); 1526 if_statinc(ifp, if_oerrors); 1527 return; 1528 } 1529 1530 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 1531 IF_ENQUEUE(&sp->pp_cpq, m); 1532 1533 if (! (ifp->if_flags & IFF_OACTIVE)) { 1534 SPPP_UNLOCK(sp); 1535 if_start_lock(ifp); 1536 SPPP_LOCK(sp, RW_WRITER); 1537 } 1538 } 1539 1540 static void 1541 sppp_cp_to_lcp(void *xsp) 1542 { 1543 struct sppp *sp = xsp; 1544 1545 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_to); 1546 } 1547 1548 static void 1549 sppp_cp_to_ipcp(void *xsp) 1550 { 1551 struct sppp *sp = xsp; 1552 1553 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_IPCP].work_to); 1554 } 1555 1556 static void 1557 sppp_cp_to_ipv6cp(void *xsp) 1558 { 1559 struct sppp *sp = xsp; 1560 1561 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_IPV6CP].work_to); 1562 } 1563 1564 static void 1565 sppp_cp_to_pap(void *xsp) 1566 { 1567 struct sppp *sp = xsp; 1568 1569 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_to); 1570 } 1571 1572 static void 1573 sppp_cp_to_chap(void *xsp) 1574 { 1575 struct sppp *sp = xsp; 1576 1577 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_to); 1578 } 1579 1580 static void 1581 sppp_cp_init(const struct cp *cp, struct sppp *sp) 1582 { 1583 struct sppp_cp *scp; 1584 typedef void (*sppp_co_cb_t)(void *); 1585 static const sppp_co_cb_t to_cb[IDX_COUNT] = { 1586 [IDX_LCP] = sppp_cp_to_lcp, 1587 [IDX_IPCP] = sppp_cp_to_ipcp, 1588 [IDX_IPV6CP] = sppp_cp_to_ipv6cp, 1589 [IDX_PAP] = sppp_cp_to_pap, 1590 [IDX_CHAP] = sppp_cp_to_chap, 1591 }; 1592 1593 scp = &sp->scp[cp->protoidx]; 1594 scp->state = STATE_INITIAL; 1595 scp->fail_counter = 0; 1596 scp->seq = 0; 1597 scp->rseq = 0; 1598 1599 SPPP_WQ_SET(&scp->work_up, cp->Up, cp); 1600 SPPP_WQ_SET(&scp->work_down, cp->Down, cp); 1601 SPPP_WQ_SET(&scp->work_open, cp->Open, cp); 1602 SPPP_WQ_SET(&scp->work_close, cp->Close, cp); 1603 SPPP_WQ_SET(&scp->work_to, cp->TO, cp); 1604 SPPP_WQ_SET(&scp->work_rcr, sppp_rcr_event, cp); 1605 SPPP_WQ_SET(&scp->work_rca, sppp_rca_event, cp); 1606 SPPP_WQ_SET(&scp->work_rcn, sppp_rcn_event, cp); 1607 SPPP_WQ_SET(&scp->work_rtr, sppp_rtr_event, cp); 1608 SPPP_WQ_SET(&scp->work_rta, sppp_rta_event, cp); 1609 SPPP_WQ_SET(&scp->work_rxj, sppp_rxj_event, cp); 1610 1611 callout_init(&scp->ch, CALLOUT_MPSAFE); 1612 callout_setfunc(&scp->ch, to_cb[cp->protoidx], sp); 1613 } 1614 1615 static void 1616 sppp_cp_fini(const struct cp *cp, struct sppp *sp) 1617 { 1618 struct sppp_cp *scp; 1619 scp = &sp->scp[cp->protoidx]; 1620 1621 sppp_wq_wait(sp->wq_cp, &scp->work_up); 1622 sppp_wq_wait(sp->wq_cp, &scp->work_down); 1623 sppp_wq_wait(sp->wq_cp, &scp->work_open); 1624 sppp_wq_wait(sp->wq_cp, &scp->work_close); 1625 sppp_wq_wait(sp->wq_cp, &scp->work_to); 1626 sppp_wq_wait(sp->wq_cp, &scp->work_rcr); 1627 sppp_wq_wait(sp->wq_cp, &scp->work_rca); 1628 sppp_wq_wait(sp->wq_cp, &scp->work_rcn); 1629 sppp_wq_wait(sp->wq_cp, &scp->work_rtr); 1630 sppp_wq_wait(sp->wq_cp, &scp->work_rta); 1631 sppp_wq_wait(sp->wq_cp, &scp->work_rxj); 1632 1633 callout_halt(&scp->ch, NULL); 1634 callout_destroy(&scp->ch); 1635 1636 if (scp->mbuf_confreq != NULL) { 1637 m_freem(scp->mbuf_confreq); 1638 scp->mbuf_confreq = NULL; 1639 } 1640 if (scp->mbuf_confnak != NULL) { 1641 m_freem(scp->mbuf_confnak); 1642 scp->mbuf_confnak = NULL; 1643 } 1644 } 1645 1646 /* 1647 * Handle incoming PPP control protocol packets. 1648 */ 1649 static void 1650 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1651 { 1652 STDDCL; 1653 struct lcp_header *h; 1654 struct sppp_cp *scp; 1655 int printlen, len = m->m_pkthdr.len; 1656 u_char *p; 1657 uint32_t u32; 1658 1659 SPPP_LOCK(sp, RW_WRITER); 1660 1661 scp = &sp->scp[cp->protoidx]; 1662 1663 if (len < 4) { 1664 if (debug) 1665 log(LOG_DEBUG, 1666 "%s: %s invalid packet length: %d bytes\n", 1667 ifp->if_xname, cp->name, len); 1668 goto out; 1669 } 1670 h = mtod(m, struct lcp_header *); 1671 if (debug) { 1672 printlen = ntohs(h->len); 1673 log(LOG_DEBUG, 1674 "%s: %s input(%s): <%s id=0x%x len=%d", 1675 ifp->if_xname, cp->name, 1676 sppp_state_name(scp->state), 1677 sppp_cp_type_name(h->type), h->ident, printlen); 1678 if (len < printlen) 1679 printlen = len; 1680 if (printlen > 4) 1681 sppp_print_bytes((u_char *)(h + 1), printlen - 4); 1682 addlog(">\n"); 1683 } 1684 if (len > ntohs(h->len)) 1685 len = ntohs(h->len); 1686 p = (u_char *)(h + 1); 1687 switch (h->type) { 1688 case CONF_REQ: 1689 if (len < 4) { 1690 if (debug) 1691 addlog("%s: %s invalid conf-req length %d\n", 1692 ifp->if_xname, cp->name, 1693 len); 1694 if_statinc(ifp, if_ierrors); 1695 break; 1696 } 1697 1698 scp->rcr_type = CP_RCR_NONE; 1699 scp->rconfid = h->ident; 1700 if (scp->mbuf_confreq != NULL) { 1701 m_freem(scp->mbuf_confreq); 1702 } 1703 scp->mbuf_confreq = m; 1704 m = NULL; 1705 sppp_wq_add(sp->wq_cp, &scp->work_rcr); 1706 break; 1707 case CONF_ACK: 1708 if (h->ident != scp->confid) { 1709 if (debug) 1710 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1711 ifp->if_xname, cp->name, 1712 h->ident, scp->confid); 1713 if_statinc(ifp, if_ierrors); 1714 break; 1715 } 1716 sppp_wq_add(sp->wq_cp, &scp->work_rca); 1717 break; 1718 case CONF_NAK: 1719 case CONF_REJ: 1720 if (h->ident != scp->confid) { 1721 if (debug) 1722 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1723 ifp->if_xname, cp->name, 1724 h->ident, scp->confid); 1725 if_statinc(ifp, if_ierrors); 1726 break; 1727 } 1728 1729 if (scp->mbuf_confnak) { 1730 m_freem(scp->mbuf_confnak); 1731 } 1732 scp->mbuf_confnak = m; 1733 m = NULL; 1734 sppp_wq_add(sp->wq_cp, &scp->work_rcn); 1735 break; 1736 case TERM_REQ: 1737 scp->rseq = h->ident; 1738 sppp_wq_add(sp->wq_cp, &scp->work_rtr); 1739 break; 1740 case TERM_ACK: 1741 if (h->ident != scp->confid && 1742 h->ident != scp->seq) { 1743 if (debug) 1744 addlog("%s: %s id mismatch " 1745 "0x%x != 0x%x and 0x%x != %0lx\n", 1746 ifp->if_xname, cp->name, 1747 h->ident, scp->confid, 1748 h->ident, scp->seq); 1749 if_statinc(ifp, if_ierrors); 1750 break; 1751 } 1752 1753 sppp_wq_add(sp->wq_cp, &scp->work_rta); 1754 break; 1755 case CODE_REJ: 1756 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1757 log(LOG_INFO, 1758 "%s: %s: ignoring RXJ (%s) for code ?, " 1759 "danger will robinson\n", 1760 ifp->if_xname, cp->name, 1761 sppp_cp_type_name(h->type)); 1762 sppp_wq_add(sp->wq_cp, &scp->work_rxj); 1763 break; 1764 case PROTO_REJ: 1765 { 1766 int catastrophic; 1767 const struct cp *upper; 1768 int i; 1769 uint16_t proto; 1770 1771 catastrophic = 0; 1772 upper = NULL; 1773 proto = p[0] << 8 | p[1]; 1774 for (i = 0; i < IDX_COUNT; i++) { 1775 if (cps[i]->proto == proto) { 1776 upper = cps[i]; 1777 break; 1778 } 1779 } 1780 if (upper == NULL) 1781 catastrophic++; 1782 1783 if (debug) 1784 log(LOG_INFO, 1785 "%s: %s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1786 ifp->if_xname, cp->name, catastrophic ? '-' : '+', 1787 sppp_cp_type_name(h->type), proto, 1788 upper ? upper->name : "unknown", 1789 upper ? sppp_state_name(sp->scp[upper->protoidx].state) : "?"); 1790 1791 /* 1792 * if we got RXJ+ against conf-req, the peer does not implement 1793 * this particular protocol type. terminate the protocol. 1794 */ 1795 if (upper && !catastrophic) { 1796 if (sp->scp[upper->protoidx].state == STATE_REQ_SENT) { 1797 sppp_wq_add(sp->wq_cp, 1798 &sp->scp[upper->protoidx].work_close); 1799 break; 1800 } 1801 } 1802 sppp_wq_add(sp->wq_cp, &scp->work_rxj); 1803 break; 1804 } 1805 case DISC_REQ: 1806 if (cp->proto != PPP_LCP) 1807 goto illegal; 1808 /* Discard the packet. */ 1809 break; 1810 case ECHO_REQ: 1811 if (cp->proto != PPP_LCP) 1812 goto illegal; 1813 if (scp->state != STATE_OPENED) { 1814 if (debug) 1815 addlog("%s: lcp echo req but lcp closed\n", 1816 ifp->if_xname); 1817 if_statinc(ifp, if_ierrors); 1818 break; 1819 } 1820 if (len < 8) { 1821 if (debug) 1822 addlog("%s: invalid lcp echo request " 1823 "packet length: %d bytes\n", 1824 ifp->if_xname, len); 1825 break; 1826 } 1827 memcpy(&u32, h + 1, sizeof u32); 1828 if (ntohl(u32) == sp->lcp.magic) { 1829 /* Line loopback mode detected. */ 1830 printf("%s: loopback\n", ifp->if_xname); 1831 /* 1832 * There is no change for items of sp->scp[cp->protoidx] 1833 * while if_down() even without SPPP_LOCK 1834 */ 1835 SPPP_UNLOCK(sp); 1836 if_down(ifp); 1837 SPPP_LOCK(sp, RW_WRITER); 1838 1839 IF_PURGE(&sp->pp_cpq); 1840 1841 /* Shut down the PPP link. */ 1842 /* XXX */ 1843 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_down); 1844 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_up); 1845 break; 1846 } 1847 u32 = htonl(sp->lcp.magic); 1848 memcpy(h + 1, &u32, sizeof u32); 1849 if (debug) 1850 addlog("%s: got lcp echo req, sending echo rep\n", 1851 ifp->if_xname); 1852 sppp_cp_send(sp, PPP_LCP, ECHO_REPLY, h->ident, len - 4, 1853 h + 1); 1854 break; 1855 case ECHO_REPLY: 1856 if (cp->proto != PPP_LCP) 1857 goto illegal; 1858 if (h->ident != sp->lcp.echoid) { 1859 if_statinc(ifp, if_ierrors); 1860 break; 1861 } 1862 if (len < 8) { 1863 if (debug) 1864 addlog("%s: lcp invalid echo reply " 1865 "packet length: %d bytes\n", 1866 ifp->if_xname, len); 1867 break; 1868 } 1869 if (debug) 1870 addlog("%s: lcp got echo rep\n", 1871 ifp->if_xname); 1872 memcpy(&u32, h + 1, sizeof u32); 1873 if (ntohl(u32) != sp->lcp.magic) 1874 sp->pp_alivecnt = 0; 1875 break; 1876 default: 1877 /* Unknown packet type -- send Code-Reject packet. */ 1878 illegal: 1879 if (debug) 1880 addlog("%s: %s send code-rej for 0x%x\n", 1881 ifp->if_xname, cp->name, h->type); 1882 sppp_cp_send(sp, cp->proto, CODE_REJ, 1883 ++scp->seq, m->m_pkthdr.len, h); 1884 if_statinc(ifp, if_ierrors); 1885 } 1886 1887 out: 1888 SPPP_UNLOCK(sp); 1889 if (m != NULL) 1890 m_freem(m); 1891 } 1892 1893 /* 1894 * The generic part of all Up/Down/Open/Close/TO event handlers. 1895 * Basically, the state transition handling in the automaton. 1896 */ 1897 static void 1898 sppp_up_event(struct sppp *sp, void *xcp) 1899 { 1900 const struct cp *cp = xcp; 1901 STDDCL; 1902 1903 KASSERT(SPPP_WLOCKED(sp)); 1904 KASSERT(!cpu_softintr_p()); 1905 1906 if ((cp->flags & CP_AUTH) != 0 && 1907 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1908 return; 1909 1910 if (debug) 1911 log(LOG_DEBUG, "%s: %s up(%s)\n", 1912 ifp->if_xname, cp->name, 1913 sppp_state_name(sp->scp[cp->protoidx].state)); 1914 1915 switch (sp->scp[cp->protoidx].state) { 1916 case STATE_INITIAL: 1917 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1918 break; 1919 case STATE_STARTING: 1920 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 1921 (cp->scr)(sp); 1922 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1923 break; 1924 default: 1925 printf("%s: %s illegal up in state %s\n", 1926 ifp->if_xname, cp->name, 1927 sppp_state_name(sp->scp[cp->protoidx].state)); 1928 } 1929 } 1930 1931 static void 1932 sppp_down_event(struct sppp *sp, void *xcp) 1933 { 1934 const struct cp *cp = xcp; 1935 STDDCL; 1936 1937 KASSERT(SPPP_WLOCKED(sp)); 1938 KASSERT(!cpu_softintr_p()); 1939 1940 if ((cp->flags & CP_AUTH) != 0 && 1941 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1942 return; 1943 1944 if (debug) 1945 log(LOG_DEBUG, "%s: %s down(%s)\n", 1946 ifp->if_xname, cp->name, 1947 sppp_state_name(sp->scp[cp->protoidx].state)); 1948 1949 switch (sp->scp[cp->protoidx].state) { 1950 case STATE_CLOSED: 1951 case STATE_CLOSING: 1952 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1953 break; 1954 case STATE_STOPPED: 1955 (cp->tls)(cp, sp); 1956 /* fall through */ 1957 case STATE_STOPPING: 1958 case STATE_REQ_SENT: 1959 case STATE_ACK_RCVD: 1960 case STATE_ACK_SENT: 1961 sppp_cp_change_state(cp, sp, STATE_STARTING); 1962 break; 1963 case STATE_OPENED: 1964 (cp->tld)(sp); 1965 sppp_cp_change_state(cp, sp, STATE_STARTING); 1966 break; 1967 default: 1968 /* 1969 * a down event may be caused regardless 1970 * of state just in LCP case. 1971 */ 1972 if (cp->proto == PPP_LCP) 1973 break; 1974 1975 printf("%s: %s illegal down in state %s\n", 1976 ifp->if_xname, cp->name, 1977 sppp_state_name(sp->scp[cp->protoidx].state)); 1978 } 1979 } 1980 1981 static void 1982 sppp_open_event(struct sppp *sp, void *xcp) 1983 { 1984 const struct cp *cp = xcp; 1985 STDDCL; 1986 1987 KASSERT(SPPP_WLOCKED(sp)); 1988 KASSERT(!cpu_softintr_p()); 1989 1990 if ((cp->flags & CP_AUTH) != 0 && 1991 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1992 return; 1993 1994 if (debug) 1995 log(LOG_DEBUG, "%s: %s open(%s)\n", 1996 ifp->if_xname, cp->name, 1997 sppp_state_name(sp->scp[cp->protoidx].state)); 1998 1999 switch (sp->scp[cp->protoidx].state) { 2000 case STATE_INITIAL: 2001 sppp_cp_change_state(cp, sp, STATE_STARTING); 2002 (cp->tls)(cp, sp); 2003 break; 2004 case STATE_STARTING: 2005 break; 2006 case STATE_CLOSED: 2007 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2008 (cp->scr)(sp); 2009 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2010 break; 2011 case STATE_STOPPED: 2012 case STATE_STOPPING: 2013 case STATE_REQ_SENT: 2014 case STATE_ACK_RCVD: 2015 case STATE_ACK_SENT: 2016 case STATE_OPENED: 2017 break; 2018 case STATE_CLOSING: 2019 sppp_cp_change_state(cp, sp, STATE_STOPPING); 2020 break; 2021 } 2022 } 2023 2024 static void 2025 sppp_close_event(struct sppp *sp, void *xcp) 2026 { 2027 const struct cp *cp = xcp; 2028 STDDCL; 2029 2030 KASSERT(SPPP_WLOCKED(sp)); 2031 KASSERT(!cpu_softintr_p()); 2032 2033 if ((cp->flags & CP_AUTH) != 0 && 2034 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 2035 return; 2036 2037 if (debug) 2038 log(LOG_DEBUG, "%s: %s close(%s)\n", 2039 ifp->if_xname, cp->name, 2040 sppp_state_name(sp->scp[cp->protoidx].state)); 2041 2042 switch (sp->scp[cp->protoidx].state) { 2043 case STATE_INITIAL: 2044 case STATE_CLOSED: 2045 case STATE_CLOSING: 2046 break; 2047 case STATE_STARTING: 2048 sppp_cp_change_state(cp, sp, STATE_INITIAL); 2049 (cp->tlf)(cp, sp); 2050 break; 2051 case STATE_STOPPED: 2052 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2053 break; 2054 case STATE_STOPPING: 2055 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2056 break; 2057 case STATE_OPENED: 2058 (cp->tld)(sp); 2059 /* fall through */ 2060 case STATE_REQ_SENT: 2061 case STATE_ACK_RCVD: 2062 case STATE_ACK_SENT: 2063 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_terminate; 2064 if ((cp->flags & CP_AUTH) == 0) { 2065 sppp_cp_send(sp, cp->proto, TERM_REQ, 2066 ++sp->scp[cp->protoidx].seq, 0, 0); 2067 } 2068 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2069 break; 2070 } 2071 } 2072 2073 static void 2074 sppp_to_event(struct sppp *sp, void *xcp) 2075 { 2076 const struct cp *cp = xcp; 2077 int s; 2078 STDDCL; 2079 2080 KASSERT(SPPP_WLOCKED(sp)); 2081 KASSERT(!cpu_softintr_p()); 2082 2083 s = splnet(); 2084 2085 if (debug) 2086 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 2087 ifp->if_xname, cp->name, 2088 sppp_state_name(sp->scp[cp->protoidx].state), 2089 sp->scp[cp->protoidx].rst_counter); 2090 2091 if (--sp->scp[cp->protoidx].rst_counter < 0) 2092 /* TO- event */ 2093 switch (sp->scp[cp->protoidx].state) { 2094 case STATE_CLOSING: 2095 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2096 (cp->tlf)(cp, sp); 2097 break; 2098 case STATE_STOPPING: 2099 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2100 (cp->tlf)(cp, sp); 2101 break; 2102 case STATE_REQ_SENT: 2103 case STATE_ACK_RCVD: 2104 case STATE_ACK_SENT: 2105 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2106 (cp->tlf)(cp, sp); 2107 break; 2108 } 2109 else 2110 /* TO+ event */ 2111 switch (sp->scp[cp->protoidx].state) { 2112 case STATE_CLOSING: 2113 case STATE_STOPPING: 2114 if ((cp->flags & CP_AUTH) == 0) { 2115 sppp_cp_send(sp, cp->proto, TERM_REQ, 2116 ++sp->scp[cp->protoidx].seq, 0, 0); 2117 } 2118 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2119 break; 2120 case STATE_REQ_SENT: 2121 case STATE_ACK_RCVD: 2122 (cp->scr)(sp); 2123 /* sppp_cp_change_state() will restart the timer */ 2124 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2125 break; 2126 case STATE_ACK_SENT: 2127 (cp->scr)(sp); 2128 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2129 break; 2130 } 2131 2132 splx(s); 2133 } 2134 static void 2135 sppp_rcr_update_state(const struct cp *cp, struct sppp *sp, 2136 enum cp_rcr_type type, uint8_t ident, size_t msglen, void *msg) 2137 { 2138 STDDCL; 2139 u_char ctype; 2140 2141 if (type == CP_RCR_ERR) { 2142 /* parse error, shut down */ 2143 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 2144 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 2145 } else if (type == CP_RCR_ACK) { 2146 /* RCR+ event */ 2147 ctype = CONF_ACK; 2148 switch (sp->scp[cp->protoidx].state) { 2149 case STATE_OPENED: 2150 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2151 cp->tld(sp); 2152 cp->scr(sp); 2153 cp->screply(cp, sp, ctype, ident, msglen, msg); 2154 break; 2155 case STATE_REQ_SENT: 2156 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2157 /* fall through */ 2158 case STATE_ACK_SENT: 2159 cp->screply(cp, sp, ctype, ident, msglen, msg); 2160 break; 2161 case STATE_STOPPED: 2162 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2163 cp->scr(sp); 2164 cp->screply(cp, sp, ctype, ident, msglen, msg); 2165 break; 2166 case STATE_ACK_RCVD: 2167 sppp_cp_change_state(cp, sp, STATE_OPENED); 2168 if (debug) 2169 log(LOG_DEBUG, "%s: %s tlu\n", 2170 ifp->if_xname, 2171 cp->name); 2172 cp->tlu(sp); 2173 cp->screply(cp, sp, ctype, ident, msglen, msg); 2174 break; 2175 case STATE_CLOSING: 2176 case STATE_STOPPING: 2177 break; 2178 case STATE_CLOSED: 2179 if ((cp->flags & CP_AUTH) == 0) { 2180 sppp_cp_send(sp, cp->proto, TERM_ACK, 2181 ident, 0, 0); 2182 } 2183 break; 2184 default: 2185 printf("%s: %s illegal RCR+ in state %s\n", 2186 ifp->if_xname, cp->name, 2187 sppp_state_name(sp->scp[cp->protoidx].state)); 2188 if_statinc(ifp, if_ierrors); 2189 } 2190 } else if (type == CP_RCR_NAK || type == CP_RCR_REJ) { 2191 ctype = type == CP_RCR_NAK ? CONF_NAK : CONF_REJ; 2192 /* RCR- event */ 2193 switch (sp->scp[cp->protoidx].state) { 2194 case STATE_OPENED: 2195 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2196 cp->tld(sp); 2197 cp->scr(sp); 2198 cp->screply(cp, sp, ctype, ident, msglen, msg); 2199 break; 2200 case STATE_ACK_SENT: 2201 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2202 /* fall through */ 2203 case STATE_REQ_SENT: 2204 cp->screply(cp, sp, ctype, ident, msglen, msg); 2205 break; 2206 case STATE_STOPPED: 2207 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2208 cp->scr(sp); 2209 cp->screply(cp, sp, ctype, ident, msglen, msg); 2210 break; 2211 case STATE_ACK_RCVD: 2212 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2213 cp->screply(cp, sp, ctype, ident, msglen, msg); 2214 break; 2215 case STATE_CLOSING: 2216 case STATE_STOPPING: 2217 break; 2218 case STATE_CLOSED: 2219 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2220 if ((cp->flags & CP_AUTH) == 0) { 2221 sppp_cp_send(sp, cp->proto, TERM_ACK, 2222 ident, 0, 0); 2223 } 2224 break; 2225 default: 2226 printf("%s: %s illegal RCR- in state %s\n", 2227 ifp->if_xname, cp->name, 2228 sppp_state_name(sp->scp[cp->protoidx].state)); 2229 if_statinc(ifp, if_ierrors); 2230 } 2231 } 2232 } 2233 2234 static void 2235 sppp_rcr_event(struct sppp *sp, void *xcp) 2236 { 2237 const struct cp *cp = xcp; 2238 struct sppp_cp *scp; 2239 struct lcp_header *h; 2240 struct mbuf *m; 2241 enum cp_rcr_type type; 2242 size_t len; 2243 uint8_t *buf; 2244 size_t blen, rlen; 2245 uint8_t ident; 2246 2247 KASSERT(!cpu_softintr_p()); 2248 2249 scp = &sp->scp[cp->protoidx]; 2250 2251 if (cp->parse_confreq != NULL) { 2252 m = scp->mbuf_confreq; 2253 if (m == NULL) 2254 return; 2255 scp->mbuf_confreq = NULL; 2256 2257 h = mtod(m, struct lcp_header *); 2258 if (h->type != CONF_REQ) { 2259 m_freem(m); 2260 return; 2261 } 2262 2263 ident = h->ident; 2264 len = MIN(m->m_pkthdr.len, ntohs(h->len)); 2265 2266 type = (cp->parse_confreq)(sp, h, len, 2267 &buf, &blen, &rlen); 2268 m_freem(m); 2269 } else { 2270 /* mbuf_cofreq is already parsed and freed */ 2271 type = scp->rcr_type; 2272 ident = scp->rconfid; 2273 buf = NULL; 2274 blen = rlen = 0; 2275 } 2276 2277 sppp_rcr_update_state(cp, sp, type, ident, rlen, (void *)buf); 2278 2279 if (buf != NULL) 2280 kmem_free(buf, blen); 2281 } 2282 2283 static void 2284 sppp_rca_event(struct sppp *sp, void *xcp) 2285 { 2286 const struct cp *cp = xcp; 2287 STDDCL; 2288 2289 KASSERT(!cpu_softintr_p()); 2290 2291 switch (sp->scp[cp->protoidx].state) { 2292 case STATE_CLOSED: 2293 case STATE_STOPPED: 2294 if ((cp->flags & CP_AUTH) == 0) { 2295 sppp_cp_send(sp, cp->proto, TERM_ACK, 2296 sp->scp[cp->protoidx].rconfid, 0, 0); 2297 } 2298 break; 2299 case STATE_CLOSING: 2300 case STATE_STOPPING: 2301 break; 2302 case STATE_REQ_SENT: 2303 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2304 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2305 break; 2306 case STATE_OPENED: 2307 (cp->tld)(sp); 2308 /* fall through */ 2309 case STATE_ACK_RCVD: 2310 (cp->scr)(sp); 2311 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2312 break; 2313 case STATE_ACK_SENT: 2314 sppp_cp_change_state(cp, sp, STATE_OPENED); 2315 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2316 if (debug) 2317 log(LOG_DEBUG, "%s: %s tlu\n", 2318 ifp->if_xname, cp->name); 2319 (cp->tlu)(sp); 2320 break; 2321 default: 2322 printf("%s: %s illegal RCA in state %s\n", 2323 ifp->if_xname, cp->name, 2324 sppp_state_name(sp->scp[cp->protoidx].state)); 2325 if_statinc(ifp, if_ierrors); 2326 } 2327 } 2328 2329 static void 2330 sppp_rcn_event(struct sppp *sp, void *xcp) 2331 { 2332 const struct cp *cp = xcp; 2333 struct sppp_cp *scp; 2334 struct lcp_header *h; 2335 struct mbuf *m; 2336 struct ifnet *ifp = &sp->pp_if; 2337 size_t len; 2338 2339 KASSERT(!cpu_softintr_p()); 2340 2341 scp = &sp->scp[cp->protoidx]; 2342 m = scp->mbuf_confnak; 2343 if (m == NULL) 2344 return; 2345 scp->mbuf_confnak = NULL; 2346 2347 h = mtod(m, struct lcp_header *); 2348 len = MIN(m->m_pkthdr.len, ntohs(h->len)); 2349 2350 switch (h->type) { 2351 case CONF_NAK: 2352 (cp->parse_confnak)(sp, h, len); 2353 break; 2354 case CONF_REJ: 2355 (cp->parse_confrej)(sp, h, len); 2356 break; 2357 default: 2358 m_freem(m); 2359 return; 2360 } 2361 2362 m_freem(m); 2363 2364 switch (scp->state) { 2365 case STATE_CLOSED: 2366 case STATE_STOPPED: 2367 if ((cp->flags & CP_AUTH) == 0) { 2368 sppp_cp_send(sp, cp->proto, TERM_ACK, 2369 scp->rconfid, 0, 0); 2370 } 2371 break; 2372 case STATE_REQ_SENT: 2373 case STATE_ACK_SENT: 2374 scp->rst_counter = sp->lcp.max_configure; 2375 (cp->scr)(sp); 2376 break; 2377 case STATE_OPENED: 2378 (cp->tld)(sp); 2379 /* fall through */ 2380 case STATE_ACK_RCVD: 2381 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2382 (cp->scr)(sp); 2383 break; 2384 case STATE_CLOSING: 2385 case STATE_STOPPING: 2386 break; 2387 default: 2388 printf("%s: %s illegal RCN in state %s\n", 2389 ifp->if_xname, cp->name, 2390 sppp_state_name(scp->state)); 2391 if_statinc(ifp, if_ierrors); 2392 } 2393 } 2394 2395 static void 2396 sppp_rtr_event(struct sppp *sp, void *xcp) 2397 { 2398 const struct cp *cp = xcp; 2399 STDDCL; 2400 2401 KASSERT(!cpu_softintr_p()); 2402 2403 switch (sp->scp[cp->protoidx].state) { 2404 case STATE_ACK_RCVD: 2405 case STATE_ACK_SENT: 2406 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2407 break; 2408 case STATE_CLOSED: 2409 case STATE_STOPPED: 2410 case STATE_CLOSING: 2411 case STATE_STOPPING: 2412 case STATE_REQ_SENT: 2413 break; 2414 case STATE_OPENED: 2415 (cp->tld)(sp); 2416 sp->scp[cp->protoidx].rst_counter = 0; 2417 sppp_cp_change_state(cp, sp, STATE_STOPPING); 2418 break; 2419 default: 2420 printf("%s: %s illegal RTR in state %s\n", 2421 ifp->if_xname, cp->name, 2422 sppp_state_name(sp->scp[cp->protoidx].state)); 2423 if_statinc(ifp, if_ierrors); 2424 return; 2425 } 2426 2427 /* Send Terminate-Ack packet. */ 2428 if (debug) 2429 log(LOG_DEBUG, "%s: %s send terminate-ack\n", 2430 ifp->if_xname, cp->name); 2431 if ((cp->flags & CP_AUTH) == 0) { 2432 sppp_cp_send(sp, cp->proto, TERM_ACK, 2433 sp->scp[cp->protoidx].rseq, 0, 0); 2434 } 2435 } 2436 2437 static void 2438 sppp_rta_event(struct sppp *sp, void *xcp) 2439 { 2440 const struct cp *cp = xcp; 2441 struct ifnet *ifp = &sp->pp_if; 2442 2443 KASSERT(!cpu_softintr_p()); 2444 2445 switch (sp->scp[cp->protoidx].state) { 2446 case STATE_CLOSED: 2447 case STATE_STOPPED: 2448 case STATE_REQ_SENT: 2449 case STATE_ACK_SENT: 2450 break; 2451 case STATE_CLOSING: 2452 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2453 (cp->tlf)(cp, sp); 2454 break; 2455 case STATE_STOPPING: 2456 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2457 (cp->tlf)(cp, sp); 2458 break; 2459 case STATE_ACK_RCVD: 2460 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2461 break; 2462 case STATE_OPENED: 2463 (cp->tld)(sp); 2464 (cp->scr)(sp); 2465 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2466 break; 2467 default: 2468 printf("%s: %s illegal RTA in state %s\n", 2469 ifp->if_xname, cp->name, 2470 sppp_state_name(sp->scp[cp->protoidx].state)); 2471 if_statinc(ifp, if_ierrors); 2472 } 2473 } 2474 2475 static void 2476 sppp_rxj_event(struct sppp *sp, void *xcp) 2477 { 2478 const struct cp *cp = xcp; 2479 struct ifnet *ifp = &sp->pp_if; 2480 2481 KASSERT(!cpu_softintr_p()); 2482 2483 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 2484 switch (sp->scp[cp->protoidx].state) { 2485 case STATE_CLOSED: 2486 case STATE_STOPPED: 2487 case STATE_REQ_SENT: 2488 case STATE_ACK_SENT: 2489 case STATE_CLOSING: 2490 case STATE_STOPPING: 2491 case STATE_OPENED: 2492 break; 2493 case STATE_ACK_RCVD: 2494 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2495 break; 2496 default: 2497 printf("%s: %s illegal RXJ- in state %s\n", 2498 ifp->if_xname, cp->name, 2499 sppp_state_name(sp->scp[cp->protoidx].state)); 2500 if_statinc(ifp, if_ierrors); 2501 } 2502 } 2503 2504 /* 2505 * Change the state of a control protocol in the state automaton. 2506 * Takes care of starting/stopping the restart timer. 2507 */ 2508 void 2509 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 2510 { 2511 2512 KASSERT(SPPP_WLOCKED(sp)); 2513 2514 sp->scp[cp->protoidx].state = newstate; 2515 callout_stop(&sp->scp[cp->protoidx].ch); 2516 switch (newstate) { 2517 case STATE_INITIAL: 2518 case STATE_STARTING: 2519 case STATE_CLOSED: 2520 case STATE_STOPPED: 2521 case STATE_OPENED: 2522 break; 2523 case STATE_CLOSING: 2524 case STATE_STOPPING: 2525 case STATE_REQ_SENT: 2526 case STATE_ACK_RCVD: 2527 case STATE_ACK_SENT: 2528 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2529 break; 2530 } 2531 } 2532 2533 /* 2534 *--------------------------------------------------------------------------* 2535 * * 2536 * The LCP implementation. * 2537 * * 2538 *--------------------------------------------------------------------------* 2539 */ 2540 static void 2541 sppp_lcp_init(struct sppp *sp) 2542 { 2543 2544 KASSERT(SPPP_WLOCKED(sp)); 2545 2546 sppp_cp_init(&lcp, sp); 2547 2548 SET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC); 2549 sp->lcp.magic = 0; 2550 sp->lcp.protos = 0; 2551 sp->lcp.max_terminate = 2; 2552 sp->lcp.max_configure = 10; 2553 sp->lcp.max_failure = 10; 2554 sp->lcp.tlf_sent = false; 2555 2556 /* 2557 * Initialize counters and timeout values. Note that we don't 2558 * use the 3 seconds suggested in RFC 1661 since we are likely 2559 * running on a fast link. XXX We should probably implement 2560 * the exponential backoff option. Note that these values are 2561 * relevant for all control protocols, not just LCP only. 2562 */ 2563 sp->lcp.timeout = 1 * hz; 2564 } 2565 2566 static void 2567 sppp_lcp_up(struct sppp *sp, void *xcp) 2568 { 2569 const struct cp *cp = xcp; 2570 int pidx; 2571 STDDCL; 2572 2573 KASSERT(SPPP_WLOCKED(sp)); 2574 2575 pidx = cp->protoidx; 2576 /* Initialize activity timestamp: opening a connection is an activity */ 2577 sp->pp_last_receive = sp->pp_last_activity = time_uptime; 2578 2579 /* 2580 * If this interface is passive or dial-on-demand, and we are 2581 * still in Initial state, it means we've got an incoming 2582 * call. Activate the interface. 2583 */ 2584 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2585 if (debug) 2586 log(LOG_DEBUG, 2587 "%s: Up event", ifp->if_xname); 2588 ifp->if_flags |= IFF_RUNNING; 2589 if (sp->scp[pidx].state == STATE_INITIAL) { 2590 if (debug) 2591 addlog("(incoming call)\n"); 2592 sp->pp_flags |= PP_CALLIN; 2593 sppp_wq_add(sp->wq_cp, &sp->scp[pidx].work_open); 2594 } else if (debug) 2595 addlog("\n"); 2596 } 2597 2598 sppp_up_event(sp, xcp); 2599 } 2600 2601 static void 2602 sppp_lcp_down(struct sppp *sp, void *xcp) 2603 { 2604 const struct cp *cp = xcp; 2605 int pidx; 2606 STDDCL; 2607 2608 KASSERT(SPPP_WLOCKED(sp)); 2609 KASSERT(!cpu_softintr_p()); 2610 2611 pidx = cp->protoidx; 2612 sppp_down_event(sp, xcp); 2613 2614 /* 2615 * We need to do tls to restart when a down event is caused 2616 * by the last tlf. 2617 */ 2618 if (sp->scp[pidx].state == STATE_STARTING && 2619 sp->lcp.tlf_sent) { 2620 cp->tls(cp, sp); 2621 sp->lcp.tlf_sent = false; 2622 } 2623 2624 /* 2625 * If this is neither a dial-on-demand nor a passive 2626 * interface, simulate an ``ifconfig down'' action, so the 2627 * administrator can force a redial by another ``ifconfig 2628 * up''. XXX For leased line operation, should we immediately 2629 * try to reopen the connection here? 2630 */ 2631 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2632 if (debug) 2633 log(LOG_INFO, 2634 "%s: Down event (carrier loss), taking interface down.\n", 2635 ifp->if_xname); 2636 SPPP_UNLOCK(sp); 2637 if_down(ifp); 2638 SPPP_LOCK(sp, RW_WRITER); 2639 2640 if (sp->lcp.reestablish) 2641 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 2642 } else { 2643 if (debug) 2644 log(LOG_DEBUG, 2645 "%s: Down event (carrier loss)\n", 2646 ifp->if_xname); 2647 2648 sp->pp_flags &= ~PP_CALLIN; 2649 if (sp->scp[pidx].state != STATE_INITIAL) 2650 sppp_wq_add(sp->wq_cp, &sp->scp[pidx].work_close); 2651 ifp->if_flags &= ~IFF_RUNNING; 2652 } 2653 sp->scp[pidx].fail_counter = 0; 2654 } 2655 2656 static void 2657 sppp_lcp_open(struct sppp *sp, void *xcp) 2658 { 2659 2660 KASSERT(SPPP_WLOCKED(sp)); 2661 KASSERT(!cpu_softintr_p()); 2662 2663 sp->lcp.reestablish = false; 2664 sp->scp[IDX_LCP].fail_counter = 0; 2665 2666 if (sp->pp_if.if_mtu < PP_MTU) { 2667 sp->lcp.mru = sp->pp_if.if_mtu; 2668 SET(sp->lcp.opts, SPPP_LCP_OPT_MRU); 2669 } else { 2670 sp->lcp.mru = PP_MTU; 2671 } 2672 sp->lcp.their_mru = PP_MTU; 2673 2674 /* 2675 * If we are authenticator, negotiate LCP_AUTH 2676 */ 2677 if (sp->hisauth.proto != 0) 2678 SET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 2679 else 2680 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 2681 sp->pp_flags &= ~PP_NEEDAUTH; 2682 sppp_open_event(sp, xcp); 2683 } 2684 2685 2686 /* 2687 * Analyze a configure request. Return true if it was agreeable, and 2688 * caused action sca, false if it has been rejected or nak'ed, and 2689 * caused action scn. (The return value is used to make the state 2690 * transition decision in the state automaton.) 2691 */ 2692 static enum cp_rcr_type 2693 sppp_lcp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 2694 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 2695 { 2696 STDDCL; 2697 u_char *buf, *r, *p, l, blen; 2698 enum cp_rcr_type type; 2699 int len, rlen; 2700 uint32_t nmagic; 2701 u_short authproto; 2702 2703 KASSERT(SPPP_WLOCKED(sp)); 2704 2705 if (origlen < sizeof(*h)) 2706 return CP_RCR_DROP; 2707 2708 origlen -= sizeof(*h); 2709 type = CP_RCR_NONE; 2710 type = 0; 2711 2712 if (origlen <= 0) 2713 return CP_RCR_DROP; 2714 else 2715 blen = origlen; 2716 2717 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 2718 if (buf == NULL) 2719 return CP_RCR_DROP; 2720 2721 if (debug) 2722 log(LOG_DEBUG, "%s: lcp parse opts:", 2723 ifp->if_xname); 2724 2725 /* pass 1: check for things that need to be rejected */ 2726 p = (void *)(h + 1); 2727 r = buf; 2728 rlen = 0; 2729 for (len = origlen; len > 1; len-= l, p += l) { 2730 l = p[1]; 2731 if (l == 0) 2732 break; 2733 2734 /* Sanity check option length */ 2735 if (l > len) { 2736 /* 2737 * Malicious option - drop immediately. 2738 * XXX Maybe we should just RXJ it? 2739 */ 2740 addlog("%s: received malicious LCP option 0x%02x, " 2741 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp->if_xname, 2742 p[0], l, len); 2743 type = CP_RCR_ERR; 2744 goto end; 2745 } 2746 if (debug) 2747 addlog(" %s", sppp_lcp_opt_name(*p)); 2748 switch (p[0]) { 2749 case LCP_OPT_MAGIC: 2750 /* Magic number. */ 2751 /* fall through, both are same length */ 2752 case LCP_OPT_ASYNC_MAP: 2753 /* Async control character map. */ 2754 if (len >= 6 || l == 6) 2755 continue; 2756 if (debug) 2757 addlog(" [invalid]"); 2758 break; 2759 case LCP_OPT_MP_EID: 2760 if (len >= l && l >= 3) { 2761 switch (p[2]) { 2762 case 0: if (l==3+ 0) continue;break; 2763 case 2: if (l==3+ 4) continue;break; 2764 case 3: if (l==3+ 6) continue;break; 2765 case 6: if (l==3+16) continue;break; 2766 case 1: /* FALLTHROUGH */ 2767 case 4: if (l<=3+20) continue;break; 2768 case 5: if (l<=3+15) continue;break; 2769 /* XXX should it be default: continue;? */ 2770 } 2771 } 2772 if (debug) 2773 addlog(" [invalid class %d len %d]", p[2], l); 2774 break; 2775 case LCP_OPT_MP_SSNHF: 2776 if (len >= 2 && l == 2) { 2777 if (debug) 2778 addlog(" [rej]"); 2779 break; 2780 } 2781 if (debug) 2782 addlog(" [invalid]"); 2783 break; 2784 case LCP_OPT_MP_MRRU: 2785 /* Multilink maximum received reconstructed unit */ 2786 /* should be fall through, both are same length */ 2787 /* FALLTHROUGH */ 2788 case LCP_OPT_MRU: 2789 /* Maximum receive unit. */ 2790 if (len >= 4 && l == 4) 2791 continue; 2792 if (debug) 2793 addlog(" [invalid]"); 2794 break; 2795 case LCP_OPT_AUTH_PROTO: 2796 if (len < 4) { 2797 if (debug) 2798 addlog(" [invalid]"); 2799 break; 2800 } 2801 authproto = (p[2] << 8) + p[3]; 2802 if (authproto == PPP_CHAP && l != 5) { 2803 if (debug) 2804 addlog(" [invalid chap len]"); 2805 break; 2806 } 2807 if (ISSET(sp->myauth.flags, SPPP_AUTHFLAG_PASSIVEAUTHPROTO)) { 2808 if (authproto == PPP_PAP || authproto == PPP_CHAP) 2809 sp->myauth.proto = authproto; 2810 } 2811 if (sp->myauth.proto == 0) { 2812 /* we are not configured to do auth */ 2813 if (debug) 2814 addlog(" [not configured]"); 2815 break; 2816 } 2817 /* 2818 * Remote want us to authenticate, remember this, 2819 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2820 * up. 2821 */ 2822 sp->pp_flags |= PP_NEEDAUTH; 2823 continue; 2824 default: 2825 /* Others not supported. */ 2826 if (debug) 2827 addlog(" [rej]"); 2828 break; 2829 } 2830 if (rlen + l > blen) { 2831 if (debug) 2832 addlog(" [overflow]"); 2833 continue; 2834 } 2835 /* Add the option to rejected list. */ 2836 memcpy(r, p, l); 2837 r += l; 2838 rlen += l; 2839 } 2840 2841 if (rlen > 0) { 2842 type = CP_RCR_REJ; 2843 goto end; 2844 } 2845 2846 if (debug) 2847 addlog("\n"); 2848 2849 /* 2850 * pass 2: check for option values that are unacceptable and 2851 * thus require to be nak'ed. 2852 */ 2853 if (debug) 2854 log(LOG_DEBUG, "%s: lcp parse opt values: ", 2855 ifp->if_xname); 2856 2857 p = (void *)(h + 1); 2858 r = buf; 2859 rlen = 0; 2860 for (len = origlen; len > 0; len -= l, p += l) { 2861 l = p[1]; 2862 if (l == 0) 2863 break; 2864 2865 if (debug) 2866 addlog(" %s", sppp_lcp_opt_name(*p)); 2867 switch (p[0]) { 2868 case LCP_OPT_MAGIC: 2869 /* Magic number -- extract. */ 2870 nmagic = (uint32_t)p[2] << 24 | 2871 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2872 if (nmagic != sp->lcp.magic) { 2873 if (debug) 2874 addlog(" 0x%x", nmagic); 2875 continue; 2876 } 2877 /* 2878 * Local and remote magics equal -- loopback? 2879 */ 2880 if (sp->pp_loopcnt >= LOOPALIVECNT*5) { 2881 printf ("%s: loopback\n", 2882 ifp->if_xname); 2883 sp->pp_loopcnt = 0; 2884 if (ifp->if_flags & IFF_UP) { 2885 SPPP_UNLOCK(sp); 2886 if_down(ifp); 2887 SPPP_LOCK(sp, RW_WRITER); 2888 2889 IF_PURGE(&sp->pp_cpq); 2890 /* XXX ? */ 2891 sppp_wq_add(sp->wq_cp, 2892 &sp->scp[IDX_LCP].work_down); 2893 sppp_wq_add(sp->wq_cp, 2894 &sp->scp[IDX_LCP].work_up); 2895 } 2896 } else if (debug) 2897 addlog(" [glitch]"); 2898 ++sp->pp_loopcnt; 2899 /* 2900 * We negate our magic here, and NAK it. If 2901 * we see it later in an NAK packet, we 2902 * suggest a new one. 2903 */ 2904 nmagic = ~sp->lcp.magic; 2905 /* Gonna NAK it. */ 2906 p[2] = nmagic >> 24; 2907 p[3] = nmagic >> 16; 2908 p[4] = nmagic >> 8; 2909 p[5] = nmagic; 2910 break; 2911 2912 case LCP_OPT_ASYNC_MAP: 2913 /* 2914 * Async control character map -- just ignore it. 2915 * 2916 * Quote from RFC 1662, chapter 6: 2917 * To enable this functionality, synchronous PPP 2918 * implementations MUST always respond to the 2919 * Async-Control-Character-Map Configuration 2920 * Option with the LCP Configure-Ack. However, 2921 * acceptance of the Configuration Option does 2922 * not imply that the synchronous implementation 2923 * will do any ACCM mapping. Instead, all such 2924 * octet mapping will be performed by the 2925 * asynchronous-to-synchronous converter. 2926 */ 2927 continue; 2928 2929 case LCP_OPT_MRU: 2930 /* 2931 * Maximum receive unit. Always agreeable, 2932 * but ignored by now. 2933 */ 2934 sp->lcp.their_mru = p[2] * 256 + p[3]; 2935 if (debug) 2936 addlog(" %ld", sp->lcp.their_mru); 2937 continue; 2938 2939 case LCP_OPT_AUTH_PROTO: 2940 authproto = (p[2] << 8) + p[3]; 2941 if (ISSET(sp->myauth.flags, SPPP_AUTHFLAG_PASSIVEAUTHPROTO)) { 2942 if (authproto == PPP_PAP || authproto == PPP_CHAP) 2943 sp->myauth.proto = authproto; 2944 } 2945 if (sp->myauth.proto == authproto) { 2946 if (authproto != PPP_CHAP || p[4] == CHAP_MD5) { 2947 continue; 2948 } 2949 if (debug) 2950 addlog(" [chap without MD5]"); 2951 } else { 2952 if (debug) 2953 addlog(" [mine %s != his %s]", 2954 sppp_proto_name(sp->myauth.proto), 2955 sppp_proto_name(authproto)); 2956 } 2957 /* not agreed, nak */ 2958 if (sp->myauth.proto == PPP_CHAP) { 2959 l = 5; 2960 } else { 2961 l = 4; 2962 } 2963 2964 if (rlen + l > blen) { 2965 if (debug) 2966 addlog(" [overflow]"); 2967 continue; 2968 } 2969 2970 r[0] = LCP_OPT_AUTH_PROTO; 2971 r[1] = l; 2972 r[2] = sp->myauth.proto >> 8; 2973 r[3] = sp->myauth.proto & 0xff; 2974 if (sp->myauth.proto == PPP_CHAP) 2975 r[4] = CHAP_MD5; 2976 rlen += l; 2977 r += l; 2978 continue; 2979 case LCP_OPT_MP_EID: 2980 /* 2981 * Endpoint identification. 2982 * Always agreeable, 2983 * but ignored by now. 2984 */ 2985 if (debug) { 2986 addlog(" type %d", p[2]); 2987 sppp_print_bytes(p+3, p[1]-3); 2988 } 2989 continue; 2990 case LCP_OPT_MP_MRRU: 2991 /* 2992 * Maximum received reconstructed unit. 2993 * Always agreeable, 2994 * but ignored by now. 2995 */ 2996 sp->lcp.their_mrru = p[2] * 256 + p[3]; 2997 if (debug) 2998 addlog(" %ld", sp->lcp.their_mrru); 2999 continue; 3000 } 3001 if (rlen + l > blen) { 3002 if (debug) 3003 addlog(" [overflow]"); 3004 continue; 3005 } 3006 /* Add the option to nak'ed list. */ 3007 memcpy(r, p, l); 3008 r += l; 3009 rlen += l; 3010 } 3011 3012 if (rlen > 0) { 3013 if (++sp->scp[IDX_LCP].fail_counter >= sp->lcp.max_failure) { 3014 if (debug) 3015 addlog(" max_failure (%d) exceeded, ", 3016 sp->lcp.max_failure); 3017 type = CP_RCR_REJ; 3018 } else { 3019 type = CP_RCR_NAK; 3020 } 3021 } else { 3022 type = CP_RCR_ACK; 3023 rlen = origlen; 3024 memcpy(r, h + 1, rlen); 3025 sp->scp[IDX_LCP].fail_counter = 0; 3026 sp->pp_loopcnt = 0; 3027 } 3028 3029 end: 3030 if (debug) 3031 addlog("\n"); 3032 3033 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 3034 if (buf != NULL) 3035 kmem_intr_free(buf, blen); 3036 } else { 3037 *msgbuf = buf; 3038 *buflen = blen; 3039 *msglen = rlen; 3040 } 3041 3042 return type; 3043 } 3044 3045 /* 3046 * Analyze the LCP Configure-Reject option list, and adjust our 3047 * negotiation. 3048 */ 3049 static void 3050 sppp_lcp_confrej(struct sppp *sp, struct lcp_header *h, int len) 3051 { 3052 STDDCL; 3053 u_char *p, l; 3054 3055 KASSERT(SPPP_WLOCKED(sp)); 3056 3057 if (len <= sizeof(*h)) 3058 return; 3059 3060 len -= sizeof(*h); 3061 3062 if (debug) 3063 log(LOG_DEBUG, "%s: lcp rej opts:", 3064 ifp->if_xname); 3065 3066 p = (void *)(h + 1); 3067 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3068 /* Sanity check option length */ 3069 if (l > len) { 3070 /* 3071 * Malicious option - drop immediately. 3072 * XXX Maybe we should just RXJ it? 3073 */ 3074 addlog("%s: received malicious LCP option, " 3075 "dropping.\n", ifp->if_xname); 3076 goto end; 3077 } 3078 if (debug) 3079 addlog(" %s", sppp_lcp_opt_name(*p)); 3080 switch (p[0]) { 3081 case LCP_OPT_MAGIC: 3082 /* Magic number -- can't use it, use 0 */ 3083 CLR(sp->lcp.opts, SPPP_LCP_OPT_MAGIC); 3084 sp->lcp.magic = 0; 3085 break; 3086 case LCP_OPT_MRU: 3087 /* 3088 * We try to negotiate a lower MRU if the underlying 3089 * link's MTU is less than PP_MTU (e.g. PPPoE). If the 3090 * peer rejects this lower rate, fallback to the 3091 * default. 3092 */ 3093 if (debug) { 3094 addlog("%s: warning: peer rejected our MRU of " 3095 "%ld bytes. Defaulting to %d bytes\n", 3096 ifp->if_xname, sp->lcp.mru, PP_MTU); 3097 } 3098 CLR(sp->lcp.opts, SPPP_LCP_OPT_MRU); 3099 sp->lcp.mru = PP_MTU; 3100 break; 3101 case LCP_OPT_AUTH_PROTO: 3102 /* 3103 * Peer doesn't want to authenticate himself, 3104 * deny unless this is a dialout call, and 3105 * SPPP_AUTHFLAG_NOCALLOUT is set. 3106 */ 3107 if ((sp->pp_flags & PP_CALLIN) == 0 && 3108 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 3109 if (debug) 3110 addlog(" [don't insist on auth " 3111 "for callout]"); 3112 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 3113 break; 3114 } 3115 if (debug) 3116 addlog("[access denied]\n"); 3117 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3118 break; 3119 } 3120 } 3121 if (debug) 3122 addlog("\n"); 3123 end: 3124 return; 3125 } 3126 3127 /* 3128 * Analyze the LCP Configure-NAK option list, and adjust our 3129 * negotiation. 3130 */ 3131 static void 3132 sppp_lcp_confnak(struct sppp *sp, struct lcp_header *h, int len) 3133 { 3134 STDDCL; 3135 u_char *p, l; 3136 uint32_t magic; 3137 3138 KASSERT(SPPP_WLOCKED(sp)); 3139 3140 if (len <= sizeof(*h)) 3141 return; 3142 len -= sizeof(*h); 3143 3144 if (debug) 3145 log(LOG_DEBUG, "%s: lcp nak opts:", 3146 ifp->if_xname); 3147 3148 p = (void *)(h + 1); 3149 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3150 /* Sanity check option length */ 3151 if (l > len) { 3152 /* 3153 * Malicious option - drop immediately. 3154 * XXX Maybe we should just RXJ it? 3155 */ 3156 addlog("%s: received malicious LCP option, " 3157 "dropping.\n", ifp->if_xname); 3158 goto end; 3159 } 3160 if (debug) 3161 addlog(" %s", sppp_lcp_opt_name(*p)); 3162 switch (p[0]) { 3163 case LCP_OPT_MAGIC: 3164 /* Magic number -- renegotiate */ 3165 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC) && 3166 len >= 6 && l == 6) { 3167 magic = (uint32_t)p[2] << 24 | 3168 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 3169 /* 3170 * If the remote magic is our negated one, 3171 * this looks like a loopback problem. 3172 * Suggest a new magic to make sure. 3173 */ 3174 if (magic == ~sp->lcp.magic) { 3175 if (debug) 3176 addlog(" magic glitch"); 3177 sp->lcp.magic = cprng_fast32(); 3178 } else { 3179 sp->lcp.magic = magic; 3180 if (debug) 3181 addlog(" %d", magic); 3182 } 3183 } 3184 break; 3185 case LCP_OPT_MRU: 3186 /* 3187 * Peer wants to advise us to negotiate an MRU. 3188 * Agree on it if it's reasonable, or use 3189 * default otherwise. 3190 */ 3191 if (len >= 4 && l == 4) { 3192 u_int mru = p[2] * 256 + p[3]; 3193 if (debug) 3194 addlog(" %d", mru); 3195 if (mru < PPP_MINMRU || mru > sp->pp_if.if_mtu) 3196 mru = sp->pp_if.if_mtu; 3197 sp->lcp.mru = mru; 3198 SET(sp->lcp.opts, SPPP_LCP_OPT_MRU); 3199 } 3200 break; 3201 case LCP_OPT_AUTH_PROTO: 3202 /* 3203 * Peer doesn't like our authentication method, 3204 * deny. 3205 */ 3206 if (debug) 3207 addlog("[access denied]\n"); 3208 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3209 break; 3210 } 3211 } 3212 if (debug) 3213 addlog("\n"); 3214 end: 3215 return; 3216 } 3217 3218 static void 3219 sppp_lcp_tlu(struct sppp *sp) 3220 { 3221 STDDCL; 3222 int i; 3223 3224 KASSERT(SPPP_WLOCKED(sp)); 3225 3226 /* unlock for IFNET_LOCK and if_up() */ 3227 SPPP_UNLOCK(sp); 3228 3229 /* XXX ? */ 3230 if (! (ifp->if_flags & IFF_UP) && 3231 (ifp->if_flags & IFF_RUNNING)) { 3232 /* Coming out of loopback mode. */ 3233 if_up(ifp); 3234 } 3235 3236 IFNET_LOCK(ifp); 3237 SPPP_LOCK(sp, RW_WRITER); 3238 3239 if (ifp->if_mtu > sp->lcp.their_mru) { 3240 sp->pp_saved_mtu = ifp->if_mtu; 3241 ifp->if_mtu = sp->lcp.their_mru; 3242 if (debug) { 3243 log(LOG_DEBUG, 3244 "%s: setting MTU " 3245 "from %"PRIu64" bytes " 3246 "to %"PRIu64" bytes\n", 3247 ifp->if_xname, sp->pp_saved_mtu, 3248 ifp->if_mtu); 3249 } 3250 } 3251 IFNET_UNLOCK(ifp); 3252 3253 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO) || 3254 (sp->pp_flags & PP_NEEDAUTH) != 0) 3255 sppp_change_phase(sp, SPPP_PHASE_AUTHENTICATE); 3256 else 3257 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 3258 3259 /* 3260 * Open all authentication protocols. This is even required 3261 * if we already proceeded to network phase, since it might be 3262 * that remote wants us to authenticate, so we might have to 3263 * send a PAP request. Undesired authentication protocols 3264 * don't do anything when they get an Open event. 3265 */ 3266 for (i = 0; i < IDX_COUNT; i++) 3267 if ((cps[i])->flags & CP_AUTH) { 3268 sppp_wq_add(sp->wq_cp, 3269 &sp->scp[(cps[i])->protoidx].work_open); 3270 } 3271 3272 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 3273 /* Notify all NCPs. */ 3274 for (i = 0; i < IDX_COUNT; i++) 3275 if ((cps[i])->flags & CP_NCP) { 3276 sppp_wq_add(sp->wq_cp, 3277 &sp->scp[(cps[i])->protoidx].work_open); 3278 } 3279 } 3280 3281 /* notify low-level driver of state change */ 3282 sppp_notify_chg_wlocked(sp); 3283 } 3284 3285 static void 3286 sppp_lcp_tld(struct sppp *sp) 3287 { 3288 STDDCL; 3289 int i, pi, phase; 3290 3291 KASSERT(SPPP_WLOCKED(sp)); 3292 3293 phase = sp->pp_phase; 3294 3295 sppp_change_phase(sp, SPPP_PHASE_TERMINATE); 3296 3297 if (sp->pp_saved_mtu > 0) { 3298 SPPP_UNLOCK(sp); 3299 IFNET_LOCK(ifp); 3300 SPPP_LOCK(sp, RW_WRITER); 3301 3302 if (debug) { 3303 log(LOG_DEBUG, 3304 "%s: setting MTU " 3305 "from %"PRIu64" bytes " 3306 "to %"PRIu64" bytes\n", 3307 ifp->if_xname, ifp->if_mtu, 3308 sp->pp_saved_mtu); 3309 } 3310 3311 ifp->if_mtu = sp->pp_saved_mtu; 3312 sp->pp_saved_mtu = 0; 3313 IFNET_UNLOCK(ifp); 3314 } 3315 3316 /* 3317 * Take upper layers down. We send the Down event first and 3318 * the Close second to prevent the upper layers from sending 3319 * ``a flurry of terminate-request packets'', as the RFC 3320 * describes it. 3321 */ 3322 for (i = 0; i < IDX_COUNT; i++) { 3323 pi = (cps[i])->protoidx; 3324 if (((cps[i])->flags & CP_LCP) == 0) { 3325 /* skip if ncp was not started */ 3326 if (phase != SPPP_PHASE_NETWORK && 3327 ((cps[i])->flags & CP_NCP) != 0) 3328 continue; 3329 3330 sppp_wq_add(sp->wq_cp, &sp->scp[pi].work_down); 3331 sppp_wq_add(sp->wq_cp, &sp->scp[pi].work_close); 3332 } 3333 } 3334 } 3335 3336 static void 3337 sppp_lcp_tls(const struct cp *cp __unused, struct sppp *sp) 3338 { 3339 3340 KASSERT(SPPP_WLOCKED(sp)); 3341 3342 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 3343 printf("%s: authentication failed %d times, not retrying again\n", 3344 sp->pp_if.if_xname, sp->pp_auth_failures); 3345 3346 SPPP_UNLOCK(sp); 3347 if_down(&sp->pp_if); 3348 SPPP_LOCK(sp, RW_WRITER); 3349 return; 3350 } 3351 3352 sppp_change_phase(sp, SPPP_PHASE_ESTABLISH); 3353 3354 /* Notify lower layer if desired. */ 3355 sppp_notify_tls_wlocked(sp); 3356 sp->lcp.tlf_sent = false; 3357 } 3358 3359 static void 3360 sppp_lcp_tlf(const struct cp *cp __unused, struct sppp *sp) 3361 { 3362 3363 KASSERT(SPPP_WLOCKED(sp)); 3364 3365 sppp_change_phase(sp, SPPP_PHASE_DEAD); 3366 3367 /* Notify lower layer if desired. */ 3368 sppp_notify_tlf_wlocked(sp); 3369 3370 switch (sp->scp[IDX_LCP].state) { 3371 case STATE_CLOSED: 3372 case STATE_STOPPED: 3373 sp->lcp.tlf_sent = true; 3374 break; 3375 case STATE_INITIAL: 3376 default: 3377 /* just in case */ 3378 sp->lcp.tlf_sent = false; 3379 } 3380 } 3381 3382 static void 3383 sppp_lcp_scr(struct sppp *sp) 3384 { 3385 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 3386 int i = 0; 3387 u_short authproto; 3388 3389 KASSERT(SPPP_WLOCKED(sp)); 3390 3391 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC)) { 3392 if (! sp->lcp.magic) 3393 sp->lcp.magic = cprng_fast32(); 3394 opt[i++] = LCP_OPT_MAGIC; 3395 opt[i++] = 6; 3396 opt[i++] = sp->lcp.magic >> 24; 3397 opt[i++] = sp->lcp.magic >> 16; 3398 opt[i++] = sp->lcp.magic >> 8; 3399 opt[i++] = sp->lcp.magic; 3400 } 3401 3402 if (ISSET(sp->lcp.opts,SPPP_LCP_OPT_MRU)) { 3403 opt[i++] = LCP_OPT_MRU; 3404 opt[i++] = 4; 3405 opt[i++] = sp->lcp.mru >> 8; 3406 opt[i++] = sp->lcp.mru; 3407 } 3408 3409 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO)) { 3410 authproto = sp->hisauth.proto; 3411 opt[i++] = LCP_OPT_AUTH_PROTO; 3412 opt[i++] = authproto == PPP_CHAP? 5: 4; 3413 opt[i++] = authproto >> 8; 3414 opt[i++] = authproto; 3415 if (authproto == PPP_CHAP) 3416 opt[i++] = CHAP_MD5; 3417 } 3418 3419 sp->scp[IDX_LCP].confid = ++sp->scp[IDX_LCP].seq; 3420 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->scp[IDX_LCP].confid, i, &opt); 3421 } 3422 3423 /* 3424 * Check the open NCPs, return true if at least one NCP is open. 3425 */ 3426 3427 static int 3428 sppp_cp_check(struct sppp *sp, u_char cp_flags) 3429 { 3430 int i, mask; 3431 3432 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 3433 if ((sp->lcp.protos & mask) && (cps[i])->flags & cp_flags) 3434 return 1; 3435 return 0; 3436 } 3437 3438 /* 3439 * Re-check the open NCPs and see if we should terminate the link. 3440 * Called by the NCPs during their tlf action handling. 3441 */ 3442 static void 3443 sppp_lcp_check_and_close(struct sppp *sp) 3444 { 3445 3446 KASSERT(SPPP_WLOCKED(sp)); 3447 3448 if (sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 3449 /* don't bother, we are already going down */ 3450 return; 3451 } 3452 3453 if (sp->pp_phase == SPPP_PHASE_AUTHENTICATE && 3454 sppp_cp_check(sp, CP_AUTH)) 3455 return; 3456 3457 if (sp->pp_phase >= SPPP_PHASE_NETWORK && 3458 sppp_cp_check(sp, CP_NCP)) 3459 return; 3460 3461 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3462 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 3463 } 3464 3465 /* 3466 *--------------------------------------------------------------------------* 3467 * * 3468 * The IPCP implementation. * 3469 * * 3470 *--------------------------------------------------------------------------* 3471 */ 3472 3473 static void 3474 sppp_ipcp_init(struct sppp *sp) 3475 { 3476 3477 KASSERT(SPPP_WLOCKED(sp)); 3478 3479 sppp_cp_init(&ipcp, sp); 3480 3481 sp->ipcp.opts = 0; 3482 sp->ipcp.flags = 0; 3483 } 3484 3485 static void 3486 sppp_ipcp_open(struct sppp *sp, void *xcp) 3487 { 3488 STDDCL; 3489 uint32_t myaddr, hisaddr; 3490 3491 KASSERT(SPPP_WLOCKED(sp)); 3492 KASSERT(!cpu_softintr_p()); 3493 3494 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 3495 sp->ipcp.req_myaddr = 0; 3496 sp->ipcp.req_hisaddr = 0; 3497 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 3498 3499 #ifdef INET 3500 kpreempt_disable(); 3501 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3502 kpreempt_enable(); 3503 #else 3504 myaddr = hisaddr = 0; 3505 #endif 3506 /* 3507 * If we don't have his address, this probably means our 3508 * interface doesn't want to talk IP at all. (This could 3509 * be the case if somebody wants to speak only IPX, for 3510 * example.) Don't open IPCP in this case. 3511 */ 3512 if (hisaddr == 0) { 3513 /* XXX this message should go away */ 3514 if (debug) 3515 log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n", 3516 ifp->if_xname); 3517 return; 3518 } 3519 3520 if (myaddr == 0) { 3521 /* 3522 * I don't have an assigned address, so i need to 3523 * negotiate my address. 3524 */ 3525 sp->ipcp.flags |= IPCP_MYADDR_DYN; 3526 SET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3527 } 3528 if (hisaddr == 1) { 3529 /* 3530 * XXX - remove this hack! 3531 * remote has no valid address, we need to get one assigned. 3532 */ 3533 sp->ipcp.flags |= IPCP_HISADDR_DYN; 3534 } 3535 3536 if (sp->query_dns & 1) { 3537 SET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3538 } else { 3539 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3540 } 3541 3542 if (sp->query_dns & 2) { 3543 SET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3544 } else { 3545 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3546 } 3547 sppp_open_event(sp, xcp); 3548 } 3549 3550 static void 3551 sppp_ipcp_close(struct sppp *sp, void *xcp) 3552 { 3553 3554 KASSERT(SPPP_WLOCKED(sp)); 3555 KASSERT(!cpu_softintr_p()); 3556 3557 sppp_close_event(sp, xcp); 3558 3559 #ifdef INET 3560 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 3561 /* 3562 * Some address was dynamic, clear it again. 3563 */ 3564 sppp_clear_ip_addrs(sp); 3565 #endif 3566 } 3567 3568 /* 3569 * Analyze a configure request. Return true if it was agreeable, and 3570 * caused action sca, false if it has been rejected or nak'ed, and 3571 * caused action scn. (The return value is used to make the state 3572 * transition decision in the state automaton.) 3573 */ 3574 static enum cp_rcr_type 3575 sppp_ipcp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 3576 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 3577 { 3578 u_char *buf, *r, *p, l, blen; 3579 enum cp_rcr_type type; 3580 struct ifnet *ifp = &sp->pp_if; 3581 int rlen, len, debug = ifp->if_flags & IFF_DEBUG; 3582 uint32_t hisaddr, desiredaddr; 3583 3584 KASSERT(SPPP_WLOCKED(sp)); 3585 3586 type = CP_RCR_NONE; 3587 origlen -= sizeof(*h); 3588 3589 if (origlen < 0) 3590 return CP_RCR_DROP; 3591 3592 /* 3593 * Make sure to allocate a buf that can at least hold a 3594 * conf-nak with an `address' option. We might need it below. 3595 */ 3596 blen = MAX(6, origlen); 3597 3598 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 3599 if (buf == NULL) 3600 return CP_RCR_DROP; 3601 3602 /* pass 1: see if we can recognize them */ 3603 if (debug) 3604 log(LOG_DEBUG, "%s: ipcp parse opts:", 3605 ifp->if_xname); 3606 p = (void *)(h + 1); 3607 r = buf; 3608 rlen = 0; 3609 for (len = origlen; len > 1; len -= l, p += l) { 3610 l = p[1]; 3611 if (l == 0) 3612 break; 3613 3614 /* Sanity check option length */ 3615 if (l > len) { 3616 /* XXX should we just RXJ? */ 3617 addlog("%s: malicious IPCP option received, dropping\n", 3618 ifp->if_xname); 3619 type = CP_RCR_ERR; 3620 goto end; 3621 } 3622 if (debug) 3623 addlog(" %s", sppp_ipcp_opt_name(*p)); 3624 switch (p[0]) { 3625 #ifdef notyet 3626 case IPCP_OPT_COMPRESSION: 3627 if (len >= 6 && l >= 6) { 3628 /* correctly formed compress option */ 3629 continue; 3630 } 3631 if (debug) 3632 addlog(" [invalid]"); 3633 break; 3634 #endif 3635 case IPCP_OPT_ADDRESS: 3636 if (len >= 6 && l == 6) { 3637 /* correctly formed address option */ 3638 continue; 3639 } 3640 if (debug) 3641 addlog(" [invalid]"); 3642 break; 3643 default: 3644 /* Others not supported. */ 3645 if (debug) 3646 addlog(" [rej]"); 3647 break; 3648 } 3649 /* Add the option to rejected list. */ 3650 if (rlen + l > blen) { 3651 if (debug) 3652 addlog(" [overflow]"); 3653 continue; 3654 } 3655 memcpy(r, p, l); 3656 r += l; 3657 rlen += l; 3658 } 3659 3660 if (rlen > 0) { 3661 type = CP_RCR_REJ; 3662 goto end; 3663 } 3664 3665 if (debug) 3666 addlog("\n"); 3667 3668 /* pass 2: parse option values */ 3669 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 3670 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 3671 else 3672 #ifdef INET 3673 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 3674 #else 3675 hisaddr = 0; 3676 #endif 3677 if (debug) 3678 log(LOG_DEBUG, "%s: ipcp parse opt values: ", 3679 ifp->if_xname); 3680 p = (void *)(h + 1); 3681 r = buf; 3682 rlen = 0; 3683 for (len = origlen; len > 1; len -= l, p += l) { 3684 l = p[1]; 3685 if (l == 0) 3686 break; 3687 3688 if (debug) 3689 addlog(" %s", sppp_ipcp_opt_name(*p)); 3690 switch (p[0]) { 3691 #ifdef notyet 3692 case IPCP_OPT_COMPRESSION: 3693 continue; 3694 #endif 3695 case IPCP_OPT_ADDRESS: 3696 desiredaddr = p[2] << 24 | p[3] << 16 | 3697 p[4] << 8 | p[5]; 3698 if (desiredaddr == hisaddr || 3699 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 3700 /* 3701 * Peer's address is same as our value, 3702 * this is agreeable. Gonna conf-ack 3703 * it. 3704 */ 3705 if (debug) 3706 addlog(" %s [ack]", 3707 sppp_dotted_quad(hisaddr)); 3708 /* record that we've seen it already */ 3709 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 3710 sp->ipcp.req_hisaddr = desiredaddr; 3711 hisaddr = desiredaddr; 3712 continue; 3713 } 3714 /* 3715 * The address wasn't agreeable. This is either 3716 * he sent us 0.0.0.0, asking to assign him an 3717 * address, or he send us another address not 3718 * matching our value. Either case, we gonna 3719 * conf-nak it with our value. 3720 */ 3721 if (debug) { 3722 if (desiredaddr == 0) 3723 addlog(" [addr requested]"); 3724 else 3725 addlog(" %s [not agreed]", 3726 sppp_dotted_quad(desiredaddr)); 3727 } 3728 3729 p[2] = hisaddr >> 24; 3730 p[3] = hisaddr >> 16; 3731 p[4] = hisaddr >> 8; 3732 p[5] = hisaddr; 3733 break; 3734 } 3735 if (rlen + l > blen) { 3736 if (debug) 3737 addlog(" [overflow]"); 3738 continue; 3739 } 3740 /* Add the option to nak'ed list. */ 3741 memcpy(r, p, l); 3742 r += l; 3743 rlen += l; 3744 } 3745 3746 if (rlen > 0) { 3747 type = CP_RCR_NAK; 3748 } else { 3749 if ((sp->ipcp.flags & IPCP_HISADDR_SEEN) == 0) { 3750 /* 3751 * If we are about to conf-ack the request, but haven't seen 3752 * his address so far, gonna conf-nak it instead, with the 3753 * `address' option present and our idea of his address being 3754 * filled in there, to request negotiation of both addresses. 3755 * 3756 * XXX This can result in an endless req - nak loop if peer 3757 * doesn't want to send us his address. Q: What should we do 3758 * about it? XXX A: implement the max-failure counter. 3759 */ 3760 buf[0] = IPCP_OPT_ADDRESS; 3761 buf[1] = 6; 3762 buf[2] = hisaddr >> 24; 3763 buf[3] = hisaddr >> 16; 3764 buf[4] = hisaddr >> 8; 3765 buf[5] = hisaddr; 3766 rlen = 6; 3767 if (debug) 3768 addlog(" still need hisaddr"); 3769 type = CP_RCR_NAK; 3770 } else { 3771 type = CP_RCR_ACK; 3772 rlen = origlen; 3773 memcpy(r, h + 1, rlen); 3774 } 3775 } 3776 3777 end: 3778 if (debug) 3779 addlog("\n"); 3780 3781 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 3782 if (buf != NULL) 3783 kmem_intr_free(buf, blen); 3784 } else { 3785 *msgbuf = buf; 3786 *buflen = blen; 3787 *msglen = rlen; 3788 } 3789 3790 return type; 3791 } 3792 3793 /* 3794 * Analyze the IPCP Configure-Reject option list, and adjust our 3795 * negotiation. 3796 */ 3797 static void 3798 sppp_ipcp_confrej(struct sppp *sp, struct lcp_header *h, int len) 3799 { 3800 u_char *p, l; 3801 struct ifnet *ifp = &sp->pp_if; 3802 int debug = ifp->if_flags & IFF_DEBUG; 3803 3804 KASSERT(SPPP_WLOCKED(sp)); 3805 3806 if (len <= sizeof(*h)) 3807 return; 3808 3809 len -= sizeof(*h); 3810 3811 if (debug) 3812 log(LOG_DEBUG, "%s: ipcp rej opts:", 3813 ifp->if_xname); 3814 3815 p = (void *)(h + 1); 3816 for (; len > 1; len -= l, p += l) { 3817 l = p[1]; 3818 if (l == 0) 3819 break; 3820 3821 /* Sanity check option length */ 3822 if (l > len) { 3823 /* XXX should we just RXJ? */ 3824 addlog("%s: malicious IPCP option received, dropping\n", 3825 ifp->if_xname); 3826 goto end; 3827 } 3828 if (debug) 3829 addlog(" %s", sppp_ipcp_opt_name(*p)); 3830 switch (p[0]) { 3831 case IPCP_OPT_ADDRESS: 3832 /* 3833 * Peer doesn't grok address option. This is 3834 * bad. XXX Should we better give up here? 3835 */ 3836 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3837 break; 3838 #ifdef notyet 3839 case IPCP_OPT_COMPRESS: 3840 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_COMPRESS); 3841 break; 3842 #endif 3843 case IPCP_OPT_PRIMDNS: 3844 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3845 break; 3846 3847 case IPCP_OPT_SECDNS: 3848 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3849 break; 3850 } 3851 } 3852 if (debug) 3853 addlog("\n"); 3854 end: 3855 return; 3856 } 3857 3858 /* 3859 * Analyze the IPCP Configure-NAK option list, and adjust our 3860 * negotiation. 3861 */ 3862 static void 3863 sppp_ipcp_confnak(struct sppp *sp, struct lcp_header *h, int len) 3864 { 3865 u_char *p, l; 3866 struct ifnet *ifp = &sp->pp_if; 3867 int debug = ifp->if_flags & IFF_DEBUG; 3868 uint32_t wantaddr; 3869 3870 KASSERT(SPPP_WLOCKED(sp)); 3871 3872 len -= sizeof(*h); 3873 3874 if (debug) 3875 log(LOG_DEBUG, "%s: ipcp nak opts:", 3876 ifp->if_xname); 3877 3878 p = (void *)(h + 1); 3879 for (; len > 1; len -= l, p += l) { 3880 l = p[1]; 3881 if (l == 0) 3882 break; 3883 3884 /* Sanity check option length */ 3885 if (l > len) { 3886 /* XXX should we just RXJ? */ 3887 addlog("%s: malicious IPCP option received, dropping\n", 3888 ifp->if_xname); 3889 return; 3890 } 3891 if (debug) 3892 addlog(" %s", sppp_ipcp_opt_name(*p)); 3893 switch (*p) { 3894 case IPCP_OPT_ADDRESS: 3895 /* 3896 * Peer doesn't like our local IP address. See 3897 * if we can do something for him. We'll drop 3898 * him our address then. 3899 */ 3900 if (len >= 6 && l == 6) { 3901 wantaddr = p[2] << 24 | p[3] << 16 | 3902 p[4] << 8 | p[5]; 3903 SET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3904 if (debug) 3905 addlog(" [wantaddr %s]", 3906 sppp_dotted_quad(wantaddr)); 3907 /* 3908 * When doing dynamic address assignment, 3909 * we accept his offer. Otherwise, we 3910 * ignore it and thus continue to negotiate 3911 * our already existing value. 3912 */ 3913 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3914 if (ntohl(wantaddr) != INADDR_ANY) { 3915 if (debug) 3916 addlog(" [agree]"); 3917 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3918 sp->ipcp.req_myaddr = wantaddr; 3919 } else { 3920 if (debug) 3921 addlog(" [not agreed]"); 3922 } 3923 } 3924 } 3925 break; 3926 3927 case IPCP_OPT_PRIMDNS: 3928 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS) && 3929 len >= 6 && l == 6) { 3930 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3931 p[4] << 8 | p[5]; 3932 } 3933 break; 3934 3935 case IPCP_OPT_SECDNS: 3936 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS) && 3937 len >= 6 && l == 6) { 3938 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3939 p[4] << 8 | p[5]; 3940 } 3941 break; 3942 #ifdef notyet 3943 case IPCP_OPT_COMPRESS: 3944 /* 3945 * Peer wants different compression parameters. 3946 */ 3947 break; 3948 #endif 3949 } 3950 } 3951 if (debug) 3952 addlog("\n"); 3953 } 3954 3955 static void 3956 sppp_ipcp_tlu(struct sppp *sp) 3957 { 3958 #ifdef INET 3959 struct ifnet *ifp; 3960 3961 ifp = &sp->pp_if; 3962 KASSERT(SPPP_WLOCKED(sp)); 3963 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && 3964 ((sp->ipcp.flags & IPCP_MYADDR_SEEN) == 0)) { 3965 log(LOG_WARNING, "%s: no IP address, closing IPCP\n", 3966 ifp->if_xname); 3967 sppp_wq_add(sp->wq_cp, 3968 &sp->scp[IDX_IPCP].work_close); 3969 } else { 3970 /* we are up. Set addresses and notify anyone interested */ 3971 sppp_set_ip_addrs(sp); 3972 } 3973 #endif 3974 } 3975 3976 static void 3977 sppp_ipcp_scr(struct sppp *sp) 3978 { 3979 uint8_t opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3980 #ifdef INET 3981 uint32_t ouraddr; 3982 #endif 3983 int i = 0; 3984 3985 KASSERT(SPPP_WLOCKED(sp)); 3986 3987 #ifdef notyet 3988 if (ISSET(sp->ipcp.opts,SPPP_IPCP_OPT_COMPRESSION)) { 3989 opt[i++] = IPCP_OPT_COMPRESSION; 3990 opt[i++] = 6; 3991 opt[i++] = 0; /* VJ header compression */ 3992 opt[i++] = 0x2d; /* VJ header compression */ 3993 opt[i++] = max_slot_id; 3994 opt[i++] = comp_slot_id; 3995 } 3996 #endif 3997 3998 #ifdef INET 3999 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS)) { 4000 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) { 4001 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 4002 } else { 4003 kpreempt_disable(); 4004 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 4005 kpreempt_enable(); 4006 } 4007 opt[i++] = IPCP_OPT_ADDRESS; 4008 opt[i++] = 6; 4009 opt[i++] = ouraddr >> 24; 4010 opt[i++] = ouraddr >> 16; 4011 opt[i++] = ouraddr >> 8; 4012 opt[i++] = ouraddr; 4013 } 4014 #endif 4015 4016 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS)) { 4017 opt[i++] = IPCP_OPT_PRIMDNS; 4018 opt[i++] = 6; 4019 opt[i++] = sp->dns_addrs[0] >> 24; 4020 opt[i++] = sp->dns_addrs[0] >> 16; 4021 opt[i++] = sp->dns_addrs[0] >> 8; 4022 opt[i++] = sp->dns_addrs[0]; 4023 } 4024 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS)) { 4025 opt[i++] = IPCP_OPT_SECDNS; 4026 opt[i++] = 6; 4027 opt[i++] = sp->dns_addrs[1] >> 24; 4028 opt[i++] = sp->dns_addrs[1] >> 16; 4029 opt[i++] = sp->dns_addrs[1] >> 8; 4030 opt[i++] = sp->dns_addrs[1]; 4031 } 4032 4033 sp->scp[IDX_IPCP].confid = ++sp->scp[IDX_IPCP].seq; 4034 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->scp[IDX_IPCP].confid, i, &opt); 4035 } 4036 4037 /* 4038 *--------------------------------------------------------------------------* 4039 * * 4040 * The IPv6CP implementation. * 4041 * * 4042 *--------------------------------------------------------------------------* 4043 */ 4044 4045 #ifdef INET6 4046 static void 4047 sppp_ipv6cp_init(struct sppp *sp) 4048 { 4049 4050 KASSERT(SPPP_WLOCKED(sp)); 4051 4052 sppp_cp_init(&ipv6cp, sp); 4053 4054 sp->ipv6cp.opts = 0; 4055 sp->ipv6cp.flags = 0; 4056 } 4057 4058 static void 4059 sppp_ipv6cp_open(struct sppp *sp, void *xcp) 4060 { 4061 STDDCL; 4062 struct in6_addr myaddr, hisaddr; 4063 4064 KASSERT(SPPP_WLOCKED(sp)); 4065 KASSERT(!cpu_softintr_p()); 4066 4067 #ifdef IPV6CP_MYIFID_DYN 4068 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 4069 #else 4070 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 4071 #endif 4072 4073 kpreempt_disable(); 4074 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 4075 kpreempt_enable(); 4076 /* 4077 * If we don't have our address, this probably means our 4078 * interface doesn't want to talk IPv6 at all. (This could 4079 * be the case if somebody wants to speak only IPX, for 4080 * example.) Don't open IPv6CP in this case. 4081 */ 4082 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 4083 /* XXX this message should go away */ 4084 if (debug) 4085 log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n", 4086 ifp->if_xname); 4087 return; 4088 } 4089 4090 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 4091 SET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 4092 sppp_open_event(sp, xcp); 4093 } 4094 4095 /* 4096 * Analyze a configure request. Return true if it was agreeable, and 4097 * caused action sca, false if it has been rejected or nak'ed, and 4098 * caused action scn. (The return value is used to make the state 4099 * transition decision in the state automaton.) 4100 */ 4101 static enum cp_rcr_type 4102 sppp_ipv6cp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 4103 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 4104 { 4105 u_char *buf, *r, *p, l, blen; 4106 struct ifnet *ifp = &sp->pp_if; 4107 int rlen, len, debug = ifp->if_flags & IFF_DEBUG; 4108 struct in6_addr myaddr, desiredaddr, suggestaddr; 4109 enum cp_rcr_type type; 4110 int ifidcount; 4111 int collision, nohisaddr; 4112 char ip6buf[INET6_ADDRSTRLEN]; 4113 4114 KASSERT(SPPP_WLOCKED(sp)); 4115 4116 type = CP_RCR_NONE; 4117 origlen -= sizeof(*h); 4118 4119 if (origlen < 0) 4120 return CP_RCR_DROP; 4121 4122 /* 4123 * Make sure to allocate a buf that can at least hold a 4124 * conf-nak with an `address' option. We might need it below. 4125 */ 4126 blen = MAX(6, origlen); 4127 4128 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 4129 if (buf == NULL) 4130 return CP_RCR_DROP; 4131 4132 /* pass 1: see if we can recognize them */ 4133 if (debug) 4134 log(LOG_DEBUG, "%s: ipv6cp parse opts:", 4135 ifp->if_xname); 4136 p = (void *)(h + 1); 4137 r = buf; 4138 rlen = 0; 4139 ifidcount = 0; 4140 for (len = origlen; len > 1; len -= l, p += l) { 4141 l = p[1]; 4142 if (l == 0) 4143 break; 4144 4145 /* Sanity check option length */ 4146 if (l > len) { 4147 /* XXX just RXJ? */ 4148 addlog("%s: received malicious IPCPv6 option, " 4149 "dropping\n", ifp->if_xname); 4150 type = CP_RCR_ERR; 4151 goto end; 4152 } 4153 if (debug) 4154 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4155 switch (p[0]) { 4156 case IPV6CP_OPT_IFID: 4157 if (len >= 10 && l == 10 && ifidcount == 0) { 4158 /* correctly formed address option */ 4159 ifidcount++; 4160 continue; 4161 } 4162 if (debug) 4163 addlog(" [invalid]"); 4164 break; 4165 #ifdef notyet 4166 case IPV6CP_OPT_COMPRESSION: 4167 if (len >= 4 && l >= 4) { 4168 /* correctly formed compress option */ 4169 continue; 4170 } 4171 if (debug) 4172 addlog(" [invalid]"); 4173 break; 4174 #endif 4175 default: 4176 /* Others not supported. */ 4177 if (debug) 4178 addlog(" [rej]"); 4179 break; 4180 } 4181 if (rlen + l > blen) { 4182 if (debug) 4183 addlog(" [overflow]"); 4184 continue; 4185 } 4186 /* Add the option to rejected list. */ 4187 memcpy(r, p, l); 4188 r += l; 4189 rlen += l; 4190 } 4191 4192 if (rlen > 0) { 4193 type = CP_RCR_REJ; 4194 goto end; 4195 } 4196 4197 if (debug) 4198 addlog("\n"); 4199 4200 /* pass 2: parse option values */ 4201 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4202 if (debug) 4203 log(LOG_DEBUG, "%s: ipv6cp parse opt values: ", 4204 ifp->if_xname); 4205 p = (void *)(h + 1); 4206 r = buf; 4207 rlen = 0; 4208 type = CP_RCR_ACK; 4209 for (len = origlen; len > 1; len -= l, p += l) { 4210 l = p[1]; 4211 if (l == 0) 4212 break; 4213 4214 if (debug) 4215 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4216 switch (p[0]) { 4217 #ifdef notyet 4218 case IPV6CP_OPT_COMPRESSION: 4219 continue; 4220 #endif 4221 case IPV6CP_OPT_IFID: 4222 memset(&desiredaddr, 0, sizeof(desiredaddr)); 4223 memcpy(&desiredaddr.s6_addr[8], &p[2], 8); 4224 collision = (memcmp(&desiredaddr.s6_addr[8], 4225 &myaddr.s6_addr[8], 8) == 0); 4226 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 4227 4228 desiredaddr.s6_addr16[0] = htons(0xfe80); 4229 (void)in6_setscope(&desiredaddr, &sp->pp_if, NULL); 4230 4231 if (!collision && !nohisaddr) { 4232 /* no collision, hisaddr known - Conf-Ack */ 4233 type = CP_RCR_ACK; 4234 memcpy(sp->ipv6cp.my_ifid, &myaddr.s6_addr[8], 4235 sizeof(sp->ipv6cp.my_ifid)); 4236 memcpy(sp->ipv6cp.his_ifid, 4237 &desiredaddr.s6_addr[8], 4238 sizeof(sp->ipv6cp.my_ifid)); 4239 4240 if (debug) { 4241 addlog(" %s [%s]", 4242 IN6_PRINT(ip6buf, &desiredaddr), 4243 sppp_cp_type_name(CONF_ACK)); 4244 } 4245 continue; 4246 } 4247 4248 memset(&suggestaddr, 0, sizeof(suggestaddr)); 4249 if (collision && nohisaddr) { 4250 /* collision, hisaddr unknown - Conf-Rej */ 4251 type = CP_RCR_REJ; 4252 memset(&p[2], 0, 8); 4253 } else { 4254 /* 4255 * - no collision, hisaddr unknown, or 4256 * - collision, hisaddr known 4257 * Conf-Nak, suggest hisaddr 4258 */ 4259 type = CP_RCR_NAK; 4260 sppp_suggest_ip6_addr(sp, &suggestaddr); 4261 memcpy(&p[2], &suggestaddr.s6_addr[8], 8); 4262 } 4263 if (debug) { 4264 int ctype = type == CP_RCR_REJ ? CONF_REJ : CONF_NAK; 4265 addlog(" %s [%s]", IN6_PRINT(ip6buf, &desiredaddr), 4266 sppp_cp_type_name(ctype)); 4267 } 4268 break; 4269 } 4270 if (rlen + l > blen) { 4271 if (debug) 4272 addlog(" [overflow]"); 4273 continue; 4274 } 4275 /* Add the option to nak'ed list. */ 4276 memcpy(r, p, l); 4277 r += l; 4278 rlen += l; 4279 } 4280 4281 if (rlen > 0) { 4282 if (type != CP_RCR_ACK) { 4283 if (debug) { 4284 int ctype ; 4285 ctype = type == CP_RCR_REJ ? 4286 CONF_REJ : CONF_NAK; 4287 addlog(" send %s suggest %s\n", 4288 sppp_cp_type_name(ctype), 4289 IN6_PRINT(ip6buf, &suggestaddr)); 4290 } 4291 } 4292 #ifdef notdef 4293 if (type == CP_RCR_ACK) 4294 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 4295 #endif 4296 } else { 4297 if (type == CP_RCR_ACK) { 4298 rlen = origlen; 4299 memcpy(r, h + 1, rlen); 4300 } 4301 } 4302 end: 4303 if (debug) 4304 addlog("\n"); 4305 4306 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 4307 if (buf != NULL) 4308 kmem_intr_free(buf, blen); 4309 } else { 4310 *msgbuf = buf; 4311 *buflen = blen; 4312 *msglen = rlen; 4313 } 4314 4315 return type; 4316 } 4317 4318 /* 4319 * Analyze the IPv6CP Configure-Reject option list, and adjust our 4320 * negotiation. 4321 */ 4322 static void 4323 sppp_ipv6cp_confrej(struct sppp *sp, struct lcp_header *h, int len) 4324 { 4325 u_char *p, l; 4326 struct ifnet *ifp = &sp->pp_if; 4327 int debug = ifp->if_flags & IFF_DEBUG; 4328 4329 KASSERT(SPPP_WLOCKED(sp)); 4330 4331 if (len <= sizeof(*h)) 4332 return; 4333 4334 len -= sizeof(*h); 4335 4336 if (debug) 4337 log(LOG_DEBUG, "%s: ipv6cp rej opts:", 4338 ifp->if_xname); 4339 4340 p = (void *)(h + 1); 4341 for (; len > 1; len -= l, p += l) { 4342 l = p[1]; 4343 if (l == 0) 4344 break; 4345 4346 if (l > len) { 4347 /* XXX just RXJ? */ 4348 addlog("%s: received malicious IPCPv6 option, " 4349 "dropping\n", ifp->if_xname); 4350 goto end; 4351 } 4352 if (debug) 4353 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4354 switch (p[0]) { 4355 case IPV6CP_OPT_IFID: 4356 /* 4357 * Peer doesn't grok address option. This is 4358 * bad. XXX Should we better give up here? 4359 */ 4360 CLR(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 4361 break; 4362 #ifdef notyet 4363 case IPV6CP_OPT_COMPRESS: 4364 CLR(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_COMPRESS); 4365 break; 4366 #endif 4367 } 4368 } 4369 if (debug) 4370 addlog("\n"); 4371 end: 4372 return; 4373 } 4374 4375 /* 4376 * Analyze the IPv6CP Configure-NAK option list, and adjust our 4377 * negotiation. 4378 */ 4379 static void 4380 sppp_ipv6cp_confnak(struct sppp *sp, struct lcp_header *h, int len) 4381 { 4382 u_char *p, l; 4383 struct ifnet *ifp = &sp->pp_if; 4384 int debug = ifp->if_flags & IFF_DEBUG; 4385 struct in6_addr suggestaddr; 4386 char ip6buf[INET6_ADDRSTRLEN]; 4387 4388 KASSERT(SPPP_WLOCKED(sp)); 4389 4390 if (len <= sizeof(*h)) 4391 return; 4392 4393 len -= sizeof(*h); 4394 4395 if (debug) 4396 log(LOG_DEBUG, "%s: ipv6cp nak opts:", 4397 ifp->if_xname); 4398 4399 p = (void *)(h + 1); 4400 for (; len > 1; len -= l, p += l) { 4401 l = p[1]; 4402 if (l == 0) 4403 break; 4404 4405 if (l > len) { 4406 /* XXX just RXJ? */ 4407 addlog("%s: received malicious IPCPv6 option, " 4408 "dropping\n", ifp->if_xname); 4409 goto end; 4410 } 4411 if (debug) 4412 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4413 switch (p[0]) { 4414 case IPV6CP_OPT_IFID: 4415 /* 4416 * Peer doesn't like our local ifid. See 4417 * if we can do something for him. We'll drop 4418 * him our address then. 4419 */ 4420 if (len < 10 || l != 10) 4421 break; 4422 memset(&suggestaddr, 0, sizeof(suggestaddr)); 4423 suggestaddr.s6_addr16[0] = htons(0xfe80); 4424 (void)in6_setscope(&suggestaddr, &sp->pp_if, NULL); 4425 memcpy(&suggestaddr.s6_addr[8], &p[2], 8); 4426 4427 SET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 4428 if (debug) 4429 addlog(" [suggestaddr %s]", 4430 IN6_PRINT(ip6buf, &suggestaddr)); 4431 #ifdef IPV6CP_MYIFID_DYN 4432 /* 4433 * When doing dynamic address assignment, 4434 * we accept his offer. 4435 */ 4436 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 4437 struct in6_addr lastsuggest; 4438 /* 4439 * If <suggested myaddr from peer> equals to 4440 * <hisaddr we have suggested last time>, 4441 * we have a collision. generate new random 4442 * ifid. 4443 */ 4444 sppp_suggest_ip6_addr(&lastsuggest); 4445 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 4446 lastsuggest)) { 4447 if (debug) 4448 addlog(" [random]"); 4449 sppp_gen_ip6_addr(sp, &suggestaddr); 4450 } 4451 sppp_set_ip6_addr(sp, &suggestaddr, 0); 4452 if (debug) 4453 addlog(" [agree]"); 4454 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 4455 } 4456 #else 4457 /* 4458 * Since we do not do dynamic address assignment, 4459 * we ignore it and thus continue to negotiate 4460 * our already existing value. This can possibly 4461 * go into infinite request-reject loop. 4462 * 4463 * This is not likely because we normally use 4464 * ifid based on MAC-address. 4465 * If you have no ethernet card on the node, too bad. 4466 * XXX should we use fail_counter? 4467 */ 4468 #endif 4469 break; 4470 #ifdef notyet 4471 case IPV6CP_OPT_COMPRESS: 4472 /* 4473 * Peer wants different compression parameters. 4474 */ 4475 break; 4476 #endif 4477 } 4478 } 4479 if (debug) 4480 addlog("\n"); 4481 end: 4482 return; 4483 } 4484 4485 static void 4486 sppp_ipv6cp_tlu(struct sppp *sp) 4487 { 4488 4489 KASSERT(SPPP_WLOCKED(sp)); 4490 /* we are up - notify isdn daemon */ 4491 sppp_notify_con_wlocked(sp); 4492 } 4493 4494 static void 4495 sppp_ipv6cp_scr(struct sppp *sp) 4496 { 4497 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 4498 struct in6_addr ouraddr; 4499 int i = 0; 4500 4501 KASSERT(SPPP_WLOCKED(sp)); 4502 4503 if (ISSET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID)) { 4504 kpreempt_disable(); 4505 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 4506 kpreempt_enable(); 4507 4508 opt[i++] = IPV6CP_OPT_IFID; 4509 opt[i++] = 10; 4510 memcpy(&opt[i], &ouraddr.s6_addr[8], 8); 4511 i += 8; 4512 } 4513 4514 #ifdef notyet 4515 if (ISSET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_COMPRESSION)) { 4516 opt[i++] = IPV6CP_OPT_COMPRESSION; 4517 opt[i++] = 4; 4518 opt[i++] = 0; /* TBD */ 4519 opt[i++] = 0; /* TBD */ 4520 /* variable length data may follow */ 4521 } 4522 #endif 4523 4524 sp->scp[IDX_IPV6CP].confid = ++sp->scp[IDX_IPV6CP].seq; 4525 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->scp[IDX_IPV6CP].confid, i, &opt); 4526 } 4527 #else /*INET6*/ 4528 static void 4529 sppp_ipv6cp_init(struct sppp *sp) 4530 { 4531 4532 KASSERT(SPPP_WLOCKED(sp)); 4533 } 4534 4535 static void 4536 sppp_ipv6cp_open(struct sppp *sp, void *xcp) 4537 { 4538 4539 KASSERT(SPPP_WLOCKED(sp)); 4540 } 4541 4542 static enum cp_rcr_type 4543 sppp_ipv6cp_confreq(struct sppp *sp, struct lcp_header *h, 4544 int len, uint8_t **msgbuf, size_t *buflen, size_t *msglen) 4545 { 4546 4547 KASSERT(SPPP_WLOCKED(sp)); 4548 return 0; 4549 } 4550 4551 static void 4552 sppp_ipv6cp_confrej(struct sppp *sp, struct lcp_header *h, 4553 int len) 4554 { 4555 4556 KASSERT(SPPP_WLOCKED(sp)); 4557 } 4558 4559 static void 4560 sppp_ipv6cp_confnak(struct sppp *sp, struct lcp_header *h, 4561 int len) 4562 { 4563 4564 KASSERT(SPPP_WLOCKED(sp)); 4565 } 4566 4567 static void 4568 sppp_ipv6cp_tlu(struct sppp *sp) 4569 { 4570 4571 KASSERT(SPPP_WLOCKED(sp)); 4572 } 4573 4574 static void 4575 sppp_ipv6cp_scr(struct sppp *sp) 4576 { 4577 4578 KASSERT(SPPP_WLOCKED(sp)); 4579 } 4580 #endif /*INET6*/ 4581 4582 /* 4583 *--------------------------------------------------------------------------* 4584 * * 4585 * The CHAP implementation. * 4586 * * 4587 *--------------------------------------------------------------------------* 4588 */ 4589 /* 4590 * The authentication protocols is implemented on the state machine for 4591 * control protocols. And it uses following actions and events. 4592 * 4593 * Actions: 4594 * - scr: send CHAP_CHALLENGE and CHAP_RESPONSE 4595 * - sca: send CHAP_SUCCESS 4596 * - scn: send CHAP_FAILURE and shutdown lcp 4597 * Events: 4598 * - RCR+: receive CHAP_RESPONSE containing correct digest 4599 * - RCR-: receive CHAP_RESPONSE containing wrong digest 4600 * - RCA: receive CHAP_SUCCESS 4601 * - RCN: (this event is unused) 4602 * - TO+: re-send CHAP_CHALLENGE and CHAP_RESPONSE 4603 * - TO-: this layer finish 4604 */ 4605 4606 /* 4607 * Handle incoming CHAP packets. 4608 */ 4609 void 4610 sppp_chap_input(struct sppp *sp, struct mbuf *m) 4611 { 4612 STDDCL; 4613 struct lcp_header *h; 4614 int len, x; 4615 u_char *value, *name, digest[sizeof(sp->chap.challenge)]; 4616 int value_len, name_len; 4617 MD5_CTX ctx; 4618 4619 len = m->m_pkthdr.len; 4620 if (len < 4) { 4621 if (debug) 4622 log(LOG_DEBUG, 4623 "%s: chap invalid packet length: %d bytes\n", 4624 ifp->if_xname, len); 4625 return; 4626 } 4627 h = mtod(m, struct lcp_header *); 4628 if (len > ntohs(h->len)) 4629 len = ntohs(h->len); 4630 4631 SPPP_LOCK(sp, RW_WRITER); 4632 4633 switch (h->type) { 4634 /* challenge, failure and success are his authproto */ 4635 case CHAP_CHALLENGE: 4636 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4637 /* can't do anything useful */ 4638 sp->pp_auth_failures++; 4639 printf("%s: chap input without my name and my secret being set\n", 4640 ifp->if_xname); 4641 break; 4642 } 4643 value = 1 + (u_char *)(h + 1); 4644 value_len = value[-1]; 4645 name = value + value_len; 4646 name_len = len - value_len - 5; 4647 if (name_len < 0) { 4648 if (debug) { 4649 log(LOG_DEBUG, 4650 "%s: chap corrupted challenge " 4651 "<%s id=0x%x len=%d", 4652 ifp->if_xname, 4653 sppp_auth_type_name(PPP_CHAP, h->type), 4654 h->ident, ntohs(h->len)); 4655 if (len > 4) 4656 sppp_print_bytes((u_char *)(h + 1), 4657 len - 4); 4658 addlog(">\n"); 4659 } 4660 break; 4661 } 4662 4663 if (debug) { 4664 log(LOG_DEBUG, 4665 "%s: chap input <%s id=0x%x len=%d name=", 4666 ifp->if_xname, 4667 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 4668 ntohs(h->len)); 4669 sppp_print_string((char *) name, name_len); 4670 addlog(" value-size=%d value=", value_len); 4671 sppp_print_bytes(value, value_len); 4672 addlog(">\n"); 4673 } 4674 4675 /* Compute reply value. */ 4676 MD5Init(&ctx); 4677 MD5Update(&ctx, &h->ident, 1); 4678 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 4679 MD5Update(&ctx, value, value_len); 4680 MD5Final(sp->chap.digest, &ctx); 4681 sp->chap.digest_len = sizeof(sp->chap.digest); 4682 sp->scp[IDX_CHAP].rconfid = h->ident; 4683 4684 sppp_wq_add(sp->wq_cp, &sp->chap.work_challenge_rcvd); 4685 break; 4686 4687 case CHAP_SUCCESS: 4688 if (debug) { 4689 log(LOG_DEBUG, "%s: chap success", 4690 ifp->if_xname); 4691 if (len > 4) { 4692 addlog(": "); 4693 sppp_print_string((char *)(h + 1), len - 4); 4694 } 4695 addlog("\n"); 4696 } 4697 4698 if (h->ident != sp->scp[IDX_CHAP].rconfid) { 4699 if (debug) { 4700 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4701 ifp->if_xname, chap.name, 4702 h->ident, sp->scp[IDX_CHAP].rconfid); 4703 } 4704 if_statinc(ifp, if_ierrors); 4705 break; 4706 } 4707 4708 if (sp->chap.digest_len == 0) { 4709 if (debug) { 4710 log(LOG_DEBUG, 4711 "%s: receive CHAP success without challenge\n", 4712 ifp->if_xname); 4713 } 4714 if_statinc(ifp, if_ierrors); 4715 break; 4716 } 4717 4718 x = splnet(); 4719 sp->pp_auth_failures = 0; 4720 sp->pp_flags &= ~PP_NEEDAUTH; 4721 splx(x); 4722 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4723 sp->chap.digest_len = 0; 4724 4725 if (!ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_SERV)) { 4726 /* 4727 * we are not authenticator for CHAP, 4728 * generate a dummy RCR+ event without CHAP_RESPONSE 4729 */ 4730 sp->scp[IDX_CHAP].rcr_type = CP_RCR_ACK; 4731 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4732 } 4733 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rca); 4734 break; 4735 4736 case CHAP_FAILURE: 4737 if (h->ident != sp->scp[IDX_CHAP].rconfid) { 4738 if (debug) { 4739 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4740 ifp->if_xname, chap.name, 4741 h->ident, sp->scp[IDX_CHAP].rconfid); 4742 } 4743 if_statinc(ifp, if_ierrors); 4744 break; 4745 } 4746 4747 if (sp->chap.digest_len == 0) { 4748 if (debug) { 4749 log(LOG_DEBUG, 4750 "%s: receive CHAP failure without challenge\n", 4751 ifp->if_xname); 4752 } 4753 if_statinc(ifp, if_ierrors); 4754 break; 4755 } 4756 4757 x = splnet(); 4758 sp->pp_auth_failures++; 4759 splx(x); 4760 if (debug) { 4761 log(LOG_INFO, "%s: chap failure", 4762 ifp->if_xname); 4763 if (len > 4) { 4764 addlog(": "); 4765 sppp_print_string((char *)(h + 1), len - 4); 4766 } 4767 addlog("\n"); 4768 } else 4769 log(LOG_INFO, "%s: chap failure\n", 4770 ifp->if_xname); 4771 4772 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4773 sp->chap.digest_len = 0; 4774 /* 4775 * await LCP shutdown by authenticator, 4776 * so we don't have to enqueue sc->scp[IDX_CHAP].work_rcn 4777 */ 4778 break; 4779 4780 /* response is my authproto */ 4781 case CHAP_RESPONSE: 4782 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4783 /* can't do anything useful */ 4784 printf("%s: chap response" 4785 " without his name and his secret being set\n", 4786 ifp->if_xname); 4787 break; 4788 } 4789 value = 1 + (u_char *)(h + 1); 4790 value_len = value[-1]; 4791 name = value + value_len; 4792 name_len = len - value_len - 5; 4793 if (name_len < 0) { 4794 if (debug) { 4795 log(LOG_DEBUG, 4796 "%s: chap corrupted response " 4797 "<%s id=0x%x len=%d", 4798 ifp->if_xname, 4799 sppp_auth_type_name(PPP_CHAP, h->type), 4800 h->ident, ntohs(h->len)); 4801 if (len > 4) 4802 sppp_print_bytes((u_char *)(h + 1), 4803 len - 4); 4804 addlog(">\n"); 4805 } 4806 break; 4807 } 4808 if (h->ident != sp->scp[IDX_CHAP].confid) { 4809 if (debug) 4810 log(LOG_DEBUG, 4811 "%s: chap dropping response for old ID " 4812 "(got %d, expected %d)\n", 4813 ifp->if_xname, 4814 h->ident, sp->scp[IDX_CHAP].confid); 4815 break; 4816 } else { 4817 sp->scp[IDX_CHAP].rconfid = h->ident; 4818 } 4819 4820 if (sp->hisauth.name != NULL && 4821 (name_len != sp->hisauth.name_len 4822 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 4823 log(LOG_INFO, "%s: chap response, his name ", 4824 ifp->if_xname); 4825 sppp_print_string(name, name_len); 4826 addlog(" != expected "); 4827 sppp_print_string(sp->hisauth.name, 4828 sp->hisauth.name_len); 4829 addlog("\n"); 4830 4831 /* generate RCR- event */ 4832 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4833 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4834 break; 4835 } 4836 4837 if (debug) { 4838 log(LOG_DEBUG, "%s: chap input(%s) " 4839 "<%s id=0x%x len=%d name=", 4840 ifp->if_xname, 4841 sppp_state_name(sp->scp[IDX_CHAP].state), 4842 sppp_auth_type_name(PPP_CHAP, h->type), 4843 h->ident, ntohs(h->len)); 4844 sppp_print_string((char *)name, name_len); 4845 addlog(" value-size=%d value=", value_len); 4846 sppp_print_bytes(value, value_len); 4847 addlog(">\n"); 4848 } 4849 4850 if (value_len == sizeof(sp->chap.challenge) && 4851 value_len == sizeof(sp->chap.digest)) { 4852 MD5Init(&ctx); 4853 MD5Update(&ctx, &h->ident, 1); 4854 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 4855 MD5Update(&ctx, sp->chap.challenge, sizeof(sp->chap.challenge)); 4856 MD5Final(digest, &ctx); 4857 4858 if (memcmp(digest, value, value_len) == 0) { 4859 sp->scp[IDX_CHAP].rcr_type = CP_RCR_ACK; 4860 if (!ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_PEER) || 4861 sp->chap.rechallenging) { 4862 /* generate a dummy RCA event*/ 4863 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rca); 4864 } 4865 } else { 4866 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4867 } 4868 } else { 4869 if (debug) 4870 log(LOG_DEBUG, 4871 "%s: chap bad hash value length: " 4872 "%d bytes, should be %zu\n", 4873 ifp->if_xname, value_len, 4874 sizeof(sp->chap.challenge)); 4875 4876 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4877 } 4878 4879 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4880 break; 4881 4882 default: 4883 /* Unknown CHAP packet type -- ignore. */ 4884 if (debug) { 4885 log(LOG_DEBUG, "%s: chap unknown input(%s) " 4886 "<0x%x id=0x%xh len=%d", 4887 ifp->if_xname, 4888 sppp_state_name(sp->scp[IDX_CHAP].state), 4889 h->type, h->ident, ntohs(h->len)); 4890 if (len > 4) 4891 sppp_print_bytes((u_char *)(h + 1), len - 4); 4892 addlog(">\n"); 4893 } 4894 break; 4895 4896 } 4897 4898 SPPP_UNLOCK(sp); 4899 } 4900 4901 static void 4902 sppp_chap_init(struct sppp *sp) 4903 { 4904 4905 KASSERT(SPPP_WLOCKED(sp)); 4906 4907 sppp_cp_init(&chap, sp); 4908 4909 SPPP_WQ_SET(&sp->chap.work_challenge_rcvd, 4910 sppp_chap_rcv_challenge_event, &chap); 4911 } 4912 4913 static void 4914 sppp_chap_open(struct sppp *sp, void *xcp) 4915 { 4916 4917 KASSERT(SPPP_WLOCKED(sp)); 4918 4919 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4920 sp->chap.digest_len = 0; 4921 sp->chap.rechallenging = false; 4922 sp->chap.response_rcvd = false; 4923 sppp_open_event(sp, xcp); 4924 } 4925 4926 static void 4927 sppp_chap_tlu(struct sppp *sp) 4928 { 4929 STDDCL; 4930 int i, x; 4931 4932 KASSERT(SPPP_WLOCKED(sp)); 4933 4934 i = 0; 4935 sp->scp[IDX_CHAP].rst_counter = sp->lcp.max_configure; 4936 x = splnet(); 4937 sp->pp_auth_failures = 0; 4938 splx(x); 4939 4940 log(LOG_DEBUG, "%s: chap %s", ifp->if_xname, 4941 sp->pp_phase == SPPP_PHASE_NETWORK ? "reconfirmed" : "tlu"); 4942 4943 /* 4944 * Some broken CHAP implementations (Conware CoNet, firmware 4945 * 4.0.?) don't want to re-authenticate their CHAP once the 4946 * initial challenge-response exchange has taken place. 4947 * Provide for an option to avoid rechallenges. 4948 */ 4949 if (ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_SERV) && 4950 (sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4951 /* 4952 * Compute the re-challenge timeout. This will yield 4953 * a number between 300 and 810 seconds. 4954 */ 4955 i = 300 + ((unsigned)(cprng_fast32() & 0xff00) >> 7); 4956 callout_schedule(&sp->scp[IDX_CHAP].ch, i * hz); 4957 4958 if (debug) { 4959 addlog(", next rechallenge in %d seconds", i); 4960 } 4961 } 4962 4963 addlog("\n"); 4964 4965 /* 4966 * If we are already in phase network, we are done here. This 4967 * is the case if this is a dummy tlu event after a re-challenge. 4968 */ 4969 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4970 sppp_phase_network(sp); 4971 } 4972 4973 static void 4974 sppp_chap_scr(struct sppp *sp) 4975 { 4976 uint32_t *ch; 4977 u_char clen, dsize; 4978 int role; 4979 4980 KASSERT(SPPP_WLOCKED(sp)); 4981 4982 role = sppp_auth_role(&chap, sp); 4983 4984 if (ISSET(role, SPPP_AUTH_SERV) && 4985 !sp->chap.response_rcvd) { 4986 /* we are authenticator for CHAP, send challenge */ 4987 ch = (uint32_t *)sp->chap.challenge; 4988 clen = sizeof(sp->chap.challenge); 4989 /* Compute random challenge. */ 4990 cprng_strong(kern_cprng, ch, clen, 0); 4991 4992 sp->scp[IDX_CHAP].confid = ++sp->scp[IDX_CHAP].seq; 4993 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->scp[IDX_CHAP].confid, 4994 sizeof(clen), (const char *)&clen, 4995 sizeof(sp->chap.challenge), sp->chap.challenge, 4996 0); 4997 } 4998 4999 if (ISSET(role, SPPP_AUTH_PEER) && 5000 sp->chap.digest_len > 0) { 5001 /* we are peer for CHAP, send response */ 5002 dsize = sp->chap.digest_len; 5003 5004 sppp_auth_send(&chap, sp, CHAP_RESPONSE, sp->scp[IDX_CHAP].rconfid, 5005 sizeof(dsize), (const char *)&dsize, 5006 sp->chap.digest_len, sp->chap.digest, 5007 sp->myauth.name_len, sp->myauth.name, 0); 5008 } 5009 } 5010 5011 static void 5012 sppp_chap_rcv_challenge_event(struct sppp *sp, void *xcp) 5013 { 5014 const struct cp *cp = xcp; 5015 5016 KASSERT(!cpu_softintr_p()); 5017 5018 sp->chap.rechallenging = false; 5019 5020 switch (sp->scp[IDX_CHAP].state) { 5021 case STATE_REQ_SENT: 5022 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 5023 cp->scr(sp); 5024 break; 5025 case STATE_OPENED: 5026 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 5027 cp->scr(sp); 5028 break; 5029 } 5030 } 5031 5032 /* 5033 *--------------------------------------------------------------------------* 5034 * * 5035 * The PAP implementation. * 5036 * * 5037 *--------------------------------------------------------------------------* 5038 */ 5039 /* 5040 * PAP uses following actions and events. 5041 * Actions: 5042 * - scr: send PAP_REQ 5043 * - sca: send PAP_ACK 5044 * - scn: send PAP_NAK 5045 * Events: 5046 * - RCR+: receive PAP_REQ containing correct username and password 5047 * - RCR-: receive PAP_REQ containing wrong username and password 5048 * - RCA: receive PAP_ACK 5049 * - RCN: (this event is unused) 5050 * - TO+: re-send PAP_REQ 5051 * - TO-: this layer finish 5052 */ 5053 5054 /* 5055 * Handle incoming PAP packets. */ 5056 static void 5057 sppp_pap_input(struct sppp *sp, struct mbuf *m) 5058 { 5059 STDDCL; 5060 struct lcp_header *h; 5061 int len, x; 5062 char *name, *secret; 5063 int name_len, secret_len; 5064 5065 /* 5066 * Malicious input might leave this uninitialized, so 5067 * init to an impossible value. 5068 */ 5069 secret_len = -1; 5070 5071 len = m->m_pkthdr.len; 5072 if (len < 5) { 5073 if (debug) 5074 log(LOG_DEBUG, 5075 "%s: pap invalid packet length: %d bytes\n", 5076 ifp->if_xname, len); 5077 return; 5078 } 5079 h = mtod(m, struct lcp_header *); 5080 if (len > ntohs(h->len)) 5081 len = ntohs(h->len); 5082 5083 SPPP_LOCK(sp, RW_WRITER); 5084 5085 switch (h->type) { 5086 /* PAP request is my authproto */ 5087 case PAP_REQ: 5088 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 5089 /* can't do anything useful */ 5090 printf("%s: pap request" 5091 " without his name and his secret being set\n", 5092 ifp->if_xname); 5093 break; 5094 } 5095 name = 1 + (u_char *)(h + 1); 5096 name_len = name[-1]; 5097 secret = name + name_len + 1; 5098 if (name_len > len - 6 || 5099 (secret_len = secret[-1]) > len - 6 - name_len) { 5100 if (debug) { 5101 log(LOG_DEBUG, "%s: pap corrupted input " 5102 "<%s id=0x%x len=%d", 5103 ifp->if_xname, 5104 sppp_auth_type_name(PPP_PAP, h->type), 5105 h->ident, ntohs(h->len)); 5106 if (len > 4) 5107 sppp_print_bytes((u_char *)(h + 1), 5108 len - 4); 5109 addlog(">\n"); 5110 } 5111 break; 5112 } 5113 if (debug) { 5114 log(LOG_DEBUG, "%s: pap input(%s) " 5115 "<%s id=0x%x len=%d name=", 5116 ifp->if_xname, 5117 sppp_state_name(sp->scp[IDX_PAP].state), 5118 sppp_auth_type_name(PPP_PAP, h->type), 5119 h->ident, ntohs(h->len)); 5120 sppp_print_string((char *)name, name_len); 5121 addlog(" secret="); 5122 sppp_print_string((char *)secret, secret_len); 5123 addlog(">\n"); 5124 } 5125 5126 sp->scp[IDX_PAP].rconfid = h->ident; 5127 5128 if (name_len == sp->hisauth.name_len && 5129 memcmp(name, sp->hisauth.name, name_len) == 0 && 5130 secret_len == sp->hisauth.secret_len && 5131 memcmp(secret, sp->hisauth.secret, secret_len) == 0) { 5132 sp->scp[IDX_PAP].rcr_type = CP_RCR_ACK; 5133 if (!ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_PEER)) { 5134 /* generate a dummy RCA event*/ 5135 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rca); 5136 } 5137 } else { 5138 sp->scp[IDX_PAP].rcr_type = CP_RCR_NAK; 5139 } 5140 5141 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rcr); 5142 break; 5143 5144 /* ack and nak are his authproto */ 5145 case PAP_ACK: 5146 if (debug) { 5147 log(LOG_DEBUG, "%s: pap success", 5148 ifp->if_xname); 5149 name = 1 + (u_char *)(h + 1); 5150 name_len = name[-1]; 5151 if (len > 5 && name_len < len+4) { 5152 addlog(": "); 5153 sppp_print_string(name, name_len); 5154 } 5155 addlog("\n"); 5156 } 5157 5158 if (h->ident != sp->scp[IDX_PAP].confid) { 5159 if (debug) { 5160 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 5161 ifp->if_xname, pap.name, 5162 h->ident, sp->scp[IDX_PAP].rconfid); 5163 } 5164 if_statinc(ifp, if_ierrors); 5165 break; 5166 } 5167 5168 x = splnet(); 5169 sp->pp_auth_failures = 0; 5170 sp->pp_flags &= ~PP_NEEDAUTH; 5171 splx(x); 5172 5173 /* we are not authenticator, generate a dummy RCR+ event */ 5174 if (!ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_SERV)) { 5175 sp->scp[IDX_PAP].rcr_type = CP_RCR_ACK; 5176 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rcr); 5177 } 5178 5179 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rca); 5180 break; 5181 5182 case PAP_NAK: 5183 if (debug) { 5184 log(LOG_INFO, "%s: pap failure", 5185 ifp->if_xname); 5186 name = 1 + (u_char *)(h + 1); 5187 name_len = name[-1]; 5188 if (len > 5 && name_len < len+4) { 5189 addlog(": "); 5190 sppp_print_string(name, name_len); 5191 } 5192 addlog("\n"); 5193 } else 5194 log(LOG_INFO, "%s: pap failure\n", 5195 ifp->if_xname); 5196 5197 if (h->ident != sp->scp[IDX_PAP].confid) { 5198 if (debug) { 5199 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 5200 ifp->if_xname, pap.name, 5201 h->ident, sp->scp[IDX_PAP].rconfid); 5202 } 5203 if_statinc(ifp, if_ierrors); 5204 break; 5205 } 5206 5207 sp->pp_auth_failures++; 5208 /* 5209 * await LCP shutdown by authenticator, 5210 * so we don't have to enqueue sc->scp[IDX_PAP].work_rcn 5211 */ 5212 break; 5213 5214 default: 5215 /* Unknown PAP packet type -- ignore. */ 5216 if (debug) { 5217 log(LOG_DEBUG, "%s: pap corrupted input " 5218 "<0x%x id=0x%x len=%d", 5219 ifp->if_xname, 5220 h->type, h->ident, ntohs(h->len)); 5221 if (len > 4) 5222 sppp_print_bytes((u_char *)(h + 1), len - 4); 5223 addlog(">\n"); 5224 } 5225 break; 5226 } 5227 5228 SPPP_UNLOCK(sp); 5229 } 5230 5231 static void 5232 sppp_pap_init(struct sppp *sp) 5233 { 5234 5235 KASSERT(SPPP_WLOCKED(sp)); 5236 sppp_cp_init(&pap, sp); 5237 } 5238 5239 static void 5240 sppp_pap_tlu(struct sppp *sp) 5241 { 5242 STDDCL; 5243 int x; 5244 5245 sp->scp[IDX_PAP].rst_counter = sp->lcp.max_configure; 5246 5247 if (debug) 5248 log(LOG_DEBUG, "%s: %s tlu\n", 5249 ifp->if_xname, pap.name); 5250 5251 x = splnet(); 5252 sp->pp_auth_failures = 0; 5253 splx(x); 5254 5255 if (sp->pp_phase < SPPP_PHASE_NETWORK) 5256 sppp_phase_network(sp); 5257 } 5258 5259 static void 5260 sppp_pap_scr(struct sppp *sp) 5261 { 5262 u_char idlen, pwdlen; 5263 5264 KASSERT(SPPP_WLOCKED(sp)); 5265 5266 if (ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_PEER) && 5267 sp->scp[IDX_PAP].state != STATE_ACK_RCVD) { 5268 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 5269 log(LOG_DEBUG, "%s: couldn't send PAP_REQ " 5270 "because of no name or no secret\n", 5271 sp->pp_if.if_xname); 5272 } else { 5273 sp->scp[IDX_PAP].confid = ++sp->scp[IDX_PAP].seq; 5274 pwdlen = sp->myauth.secret_len; 5275 idlen = sp->myauth.name_len; 5276 5277 sppp_auth_send(&pap, sp, PAP_REQ, sp->scp[IDX_PAP].confid, 5278 sizeof idlen, (const char *)&idlen, 5279 idlen, sp->myauth.name, 5280 sizeof pwdlen, (const char *)&pwdlen, 5281 pwdlen, sp->myauth.secret, 5282 0); 5283 } 5284 } 5285 } 5286 5287 /* 5288 * Random miscellaneous functions. 5289 */ 5290 5291 /* 5292 * Send a PAP or CHAP proto packet. 5293 * 5294 * Varadic function, each of the elements for the ellipsis is of type 5295 * ``size_t mlen, const u_char *msg''. Processing will stop iff 5296 * mlen == 0. 5297 * NOTE: never declare variadic functions with types subject to type 5298 * promotion (i.e. u_char). This is asking for big trouble depending 5299 * on the architecture you are on... 5300 */ 5301 5302 static void 5303 sppp_auth_send(const struct cp *cp, struct sppp *sp, 5304 unsigned int type, unsigned int id, 5305 ...) 5306 { 5307 STDDCL; 5308 struct lcp_header *lh; 5309 struct mbuf *m; 5310 u_char *p; 5311 int len; 5312 size_t pkthdrlen; 5313 unsigned int mlen; 5314 const char *msg; 5315 va_list ap; 5316 5317 KASSERT(SPPP_WLOCKED(sp)); 5318 5319 MGETHDR(m, M_DONTWAIT, MT_DATA); 5320 if (! m) 5321 return; 5322 m_reset_rcvif(m); 5323 5324 if (sp->pp_flags & PP_NOFRAMING) { 5325 *mtod(m, uint16_t *) = htons(cp->proto); 5326 pkthdrlen = 2; 5327 lh = (struct lcp_header *)(mtod(m, uint8_t *)+2); 5328 } else { 5329 struct ppp_header *h; 5330 h = mtod(m, struct ppp_header *); 5331 h->address = PPP_ALLSTATIONS; /* broadcast address */ 5332 h->control = PPP_UI; /* Unnumbered Info */ 5333 h->protocol = htons(cp->proto); 5334 pkthdrlen = PPP_HEADER_LEN; 5335 5336 lh = (struct lcp_header *)(h + 1); 5337 } 5338 5339 lh->type = type; 5340 lh->ident = id; 5341 p = (u_char *)(lh + 1); 5342 5343 va_start(ap, id); 5344 len = 0; 5345 5346 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 5347 msg = va_arg(ap, const char *); 5348 len += mlen; 5349 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 5350 va_end(ap); 5351 m_freem(m); 5352 return; 5353 } 5354 5355 memcpy(p, msg, mlen); 5356 p += mlen; 5357 } 5358 va_end(ap); 5359 5360 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 5361 lh->len = htons(LCP_HEADER_LEN + len); 5362 5363 if (debug) { 5364 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 5365 ifp->if_xname, cp->name, 5366 sppp_auth_type_name(cp->proto, lh->type), 5367 lh->ident, ntohs(lh->len)); 5368 if (len) 5369 sppp_print_bytes((u_char *)(lh + 1), len); 5370 addlog(">\n"); 5371 } 5372 if (IF_QFULL(&sp->pp_cpq)) { 5373 IF_DROP(&sp->pp_fastq); 5374 IF_DROP(&ifp->if_snd); 5375 m_freem(m); 5376 if_statinc(ifp, if_oerrors); 5377 return; 5378 } 5379 5380 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 5381 IF_ENQUEUE(&sp->pp_cpq, m); 5382 5383 if (! (ifp->if_flags & IFF_OACTIVE)) { 5384 SPPP_UNLOCK(sp); 5385 if_start_lock(ifp); 5386 SPPP_LOCK(sp, RW_WRITER); 5387 } 5388 } 5389 5390 static int 5391 sppp_auth_role(const struct cp *cp, struct sppp *sp) 5392 { 5393 int role; 5394 5395 role = SPPP_AUTH_NOROLE; 5396 5397 if (sp->hisauth.proto == cp->proto && 5398 ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO)) 5399 SET(role, SPPP_AUTH_SERV); 5400 5401 if (sp->myauth.proto == cp->proto) 5402 SET(role, SPPP_AUTH_PEER); 5403 5404 return role; 5405 } 5406 5407 static void 5408 sppp_auth_to_event(struct sppp *sp, void *xcp) 5409 { 5410 const struct cp *cp = xcp; 5411 bool override; 5412 int state; 5413 STDDCL; 5414 5415 KASSERT(SPPP_WLOCKED(sp)); 5416 KASSERT(!cpu_softintr_p()); 5417 5418 override = false; 5419 state = sp->scp[cp->protoidx].state; 5420 5421 if (sp->scp[cp->protoidx].rst_counter > 0) { 5422 /* override TO+ event */ 5423 switch (state) { 5424 case STATE_OPENED: 5425 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 5426 override = true; 5427 sp->chap.rechallenging = true; 5428 sp->chap.response_rcvd = false; 5429 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 5430 cp->scr(sp); 5431 } 5432 break; 5433 5434 case STATE_ACK_RCVD: 5435 override = true; 5436 cp->scr(sp); 5437 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 5438 break; 5439 } 5440 } 5441 5442 if (override) { 5443 if (debug) 5444 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 5445 ifp->if_xname, cp->name, 5446 sppp_state_name(state), 5447 sp->scp[cp->protoidx].rst_counter); 5448 sp->scp[cp->protoidx].rst_counter--; 5449 } else { 5450 sppp_to_event(sp, xcp); 5451 } 5452 } 5453 5454 static void 5455 sppp_auth_screply(const struct cp *cp, struct sppp *sp, u_char ctype, 5456 uint8_t ident, size_t _mlen __unused, void *_msg __unused) 5457 { 5458 static const char *succmsg = "Welcome!"; 5459 static const char *failmsg = "Failed..."; 5460 const char *msg; 5461 u_char type, mlen; 5462 5463 KASSERT(SPPP_WLOCKED(sp)); 5464 5465 if (!ISSET(sppp_auth_role(cp, sp), SPPP_AUTH_SERV)) 5466 return; 5467 5468 if (ctype == CONF_ACK) { 5469 type = cp->proto == PPP_CHAP ? CHAP_SUCCESS : PAP_ACK; 5470 msg = succmsg; 5471 mlen = sizeof(succmsg) - 1; 5472 5473 sp->pp_auth_failures = 0; 5474 } else { 5475 type = cp->proto == PPP_CHAP ? CHAP_FAILURE : PAP_NAK; 5476 msg = failmsg; 5477 mlen = sizeof(failmsg) - 1; 5478 5479 /* shutdown LCP if auth failed */ 5480 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5481 sp->pp_auth_failures++; 5482 } 5483 5484 sppp_auth_send(cp, sp, type, ident, mlen, (const u_char *)msg, 0); 5485 } 5486 5487 /* 5488 * Send keepalive packets, every 10 seconds. 5489 */ 5490 static void 5491 sppp_keepalive(void *dummy) 5492 { 5493 struct sppp *sp; 5494 int s; 5495 time_t now; 5496 5497 SPPPQ_LOCK(); 5498 5499 s = splnet(); 5500 now = time_uptime; 5501 for (sp=spppq; sp; sp=sp->pp_next) { 5502 struct ifnet *ifp = NULL; 5503 5504 SPPP_LOCK(sp, RW_WRITER); 5505 ifp = &sp->pp_if; 5506 5507 /* check idle timeout */ 5508 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 5509 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 5510 /* idle timeout is enabled for this interface */ 5511 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 5512 if (ifp->if_flags & IFF_DEBUG) 5513 printf("%s: no activity for %lu seconds\n", 5514 sp->pp_if.if_xname, 5515 (unsigned long)(now-sp->pp_last_activity)); 5516 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5517 SPPP_UNLOCK(sp); 5518 continue; 5519 } 5520 } 5521 5522 /* Keepalive mode disabled or channel down? */ 5523 if (! (sp->pp_flags & PP_KEEPALIVE) || 5524 ! (ifp->if_flags & IFF_RUNNING)) { 5525 SPPP_UNLOCK(sp); 5526 continue; 5527 } 5528 5529 /* No keepalive in PPP mode if LCP not opened yet. */ 5530 if (! (sp->pp_flags & PP_CISCO) && 5531 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 5532 SPPP_UNLOCK(sp); 5533 continue; 5534 } 5535 5536 /* No echo reply, but maybe user data passed through? */ 5537 if ((now - sp->pp_last_receive) < sp->pp_max_noreceive) { 5538 sp->pp_alivecnt = 0; 5539 SPPP_UNLOCK(sp); 5540 continue; 5541 } 5542 5543 if (sp->pp_alivecnt >= sp->pp_maxalive) { 5544 /* No keepalive packets got. Stop the interface. */ 5545 sppp_wq_add(sp->wq_cp, &sp->work_ifdown); 5546 5547 if (! (sp->pp_flags & PP_CISCO)) { 5548 printf("%s: LCP keepalive timed out, going to restart the connection\n", 5549 ifp->if_xname); 5550 sp->pp_alivecnt = 0; 5551 5552 /* we are down, close all open protocols */ 5553 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5554 5555 /* And now prepare LCP to reestablish the link, if configured to do so. */ 5556 sp->lcp.reestablish = true; 5557 5558 SPPP_UNLOCK(sp); 5559 continue; 5560 } 5561 } 5562 if (sp->pp_alivecnt < sp->pp_maxalive) 5563 ++sp->pp_alivecnt; 5564 if (sp->pp_flags & PP_CISCO) 5565 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, 5566 ++sp->scp[IDX_LCP].seq, sp->scp[IDX_LCP].rseq); 5567 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 5568 int32_t nmagic = htonl(sp->lcp.magic); 5569 sp->lcp.echoid = ++sp->scp[IDX_LCP].seq; 5570 sppp_cp_send(sp, PPP_LCP, ECHO_REQ, 5571 sp->lcp.echoid, 4, &nmagic); 5572 } 5573 5574 SPPP_UNLOCK(sp); 5575 } 5576 splx(s); 5577 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 5578 5579 SPPPQ_UNLOCK(); 5580 } 5581 5582 #ifdef INET 5583 /* 5584 * Get both IP addresses. 5585 */ 5586 static void 5587 sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, uint32_t *srcmask) 5588 { 5589 struct ifnet *ifp = &sp->pp_if; 5590 struct ifaddr *ifa; 5591 struct sockaddr_in *si, *sm; 5592 uint32_t ssrc, ddst; 5593 int s; 5594 struct psref psref; 5595 5596 sm = NULL; 5597 ssrc = ddst = 0; 5598 /* 5599 * Pick the first AF_INET address from the list, 5600 * aliases don't make any sense on a p2p link anyway. 5601 */ 5602 si = 0; 5603 s = pserialize_read_enter(); 5604 IFADDR_READER_FOREACH(ifa, ifp) { 5605 if (ifa->ifa_addr->sa_family == AF_INET) { 5606 si = (struct sockaddr_in *)ifa->ifa_addr; 5607 sm = (struct sockaddr_in *)ifa->ifa_netmask; 5608 if (si) { 5609 ifa_acquire(ifa, &psref); 5610 break; 5611 } 5612 } 5613 } 5614 pserialize_read_exit(s); 5615 if (ifa) { 5616 if (si && si->sin_addr.s_addr) { 5617 ssrc = si->sin_addr.s_addr; 5618 if (srcmask) 5619 *srcmask = ntohl(sm->sin_addr.s_addr); 5620 } 5621 5622 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 5623 if (si && si->sin_addr.s_addr) 5624 ddst = si->sin_addr.s_addr; 5625 ifa_release(ifa, &psref); 5626 } 5627 5628 if (dst) *dst = ntohl(ddst); 5629 if (src) *src = ntohl(ssrc); 5630 } 5631 5632 /* 5633 * Set IP addresses. Must be called at splnet. 5634 * If an address is 0, leave it the way it is. 5635 */ 5636 static void 5637 sppp_set_ip_addrs(struct sppp *sp) 5638 { 5639 STDDCL; 5640 struct ifaddr *ifa; 5641 struct sockaddr_in *si, *dest; 5642 uint32_t myaddr = 0, hisaddr = 0; 5643 int s; 5644 5645 KASSERT(SPPP_WLOCKED(sp)); 5646 SPPP_UNLOCK(sp); 5647 IFNET_LOCK(ifp); 5648 SPPP_LOCK(sp, RW_WRITER); 5649 5650 /* 5651 * Pick the first AF_INET address from the list, 5652 * aliases don't make any sense on a p2p link anyway. 5653 */ 5654 si = dest = NULL; 5655 s = pserialize_read_enter(); 5656 IFADDR_READER_FOREACH(ifa, ifp) { 5657 if (ifa->ifa_addr->sa_family == AF_INET) { 5658 si = (struct sockaddr_in *)ifa->ifa_addr; 5659 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5660 break; 5661 } 5662 } 5663 pserialize_read_exit(s); 5664 5665 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 5666 myaddr = sp->ipcp.req_myaddr; 5667 else if (si != NULL) 5668 myaddr = ntohl(si->sin_addr.s_addr); 5669 5670 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 5671 hisaddr = sp->ipcp.req_hisaddr; 5672 else if (dest != NULL) 5673 hisaddr = ntohl(dest->sin_addr.s_addr); 5674 5675 if (si != NULL && dest != NULL) { 5676 int error; 5677 struct sockaddr_in new_sin = *si; 5678 struct sockaddr_in new_dst = *dest; 5679 5680 if (myaddr != 0) 5681 new_sin.sin_addr.s_addr = htonl(myaddr); 5682 if (hisaddr != 0) { 5683 new_dst.sin_addr.s_addr = htonl(hisaddr); 5684 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) 5685 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 5686 } 5687 5688 in_addrhash_remove(ifatoia(ifa)); 5689 5690 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5691 5692 in_addrhash_insert(ifatoia(ifa)); 5693 5694 if (debug && error) 5695 { 5696 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5697 ifp->if_xname, __func__, error); 5698 } 5699 if (!error) { 5700 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5701 } 5702 } 5703 5704 IFNET_UNLOCK(ifp); 5705 5706 sppp_notify_con(sp); 5707 } 5708 5709 /* 5710 * Clear IP addresses. Must be called at splnet. 5711 */ 5712 static void 5713 sppp_clear_ip_addrs(struct sppp *sp) 5714 { 5715 STDDCL; 5716 struct ifaddr *ifa; 5717 struct sockaddr_in *si, *dest; 5718 int s; 5719 5720 KASSERT(SPPP_WLOCKED(sp)); 5721 SPPP_UNLOCK(sp); 5722 IFNET_LOCK(ifp); 5723 SPPP_LOCK(sp, RW_WRITER); 5724 5725 /* 5726 * Pick the first AF_INET address from the list, 5727 * aliases don't make any sense on a p2p link anyway. 5728 */ 5729 si = dest = NULL; 5730 s = pserialize_read_enter(); 5731 IFADDR_READER_FOREACH(ifa, ifp) { 5732 if (ifa->ifa_addr->sa_family == AF_INET) { 5733 si = (struct sockaddr_in *)ifa->ifa_addr; 5734 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5735 break; 5736 } 5737 } 5738 pserialize_read_exit(s); 5739 5740 if (si != NULL) { 5741 struct sockaddr_in new_sin = *si; 5742 struct sockaddr_in new_dst = *dest; 5743 int error; 5744 5745 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 5746 new_sin.sin_addr.s_addr = 0; 5747 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 5748 new_dst.sin_addr.s_addr = sp->ipcp.saved_hisaddr; 5749 5750 in_addrhash_remove(ifatoia(ifa)); 5751 5752 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5753 5754 in_addrhash_insert(ifatoia(ifa)); 5755 5756 if (debug && error) 5757 { 5758 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5759 ifp->if_xname, __func__, error); 5760 } 5761 if (!error) { 5762 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5763 } 5764 } 5765 5766 IFNET_UNLOCK(ifp); 5767 } 5768 #endif 5769 5770 #ifdef INET6 5771 /* 5772 * Get both IPv6 addresses. 5773 */ 5774 static void 5775 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 5776 struct in6_addr *srcmask) 5777 { 5778 struct ifnet *ifp = &sp->pp_if; 5779 struct ifaddr *ifa; 5780 struct sockaddr_in6 *si, *sm; 5781 struct in6_addr ssrc, ddst; 5782 int s; 5783 struct psref psref; 5784 5785 sm = NULL; 5786 memset(&ssrc, 0, sizeof(ssrc)); 5787 memset(&ddst, 0, sizeof(ddst)); 5788 /* 5789 * Pick the first link-local AF_INET6 address from the list, 5790 * aliases don't make any sense on a p2p link anyway. 5791 */ 5792 si = 0; 5793 s = pserialize_read_enter(); 5794 IFADDR_READER_FOREACH(ifa, ifp) { 5795 if (ifa->ifa_addr->sa_family == AF_INET6) { 5796 si = (struct sockaddr_in6 *)ifa->ifa_addr; 5797 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 5798 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) { 5799 ifa_acquire(ifa, &psref); 5800 break; 5801 } 5802 } 5803 } 5804 pserialize_read_exit(s); 5805 5806 if (ifa) { 5807 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 5808 memcpy(&ssrc, &si->sin6_addr, sizeof(ssrc)); 5809 if (srcmask) { 5810 memcpy(srcmask, &sm->sin6_addr, 5811 sizeof(*srcmask)); 5812 } 5813 } 5814 5815 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 5816 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 5817 memcpy(&ddst, &si->sin6_addr, sizeof(ddst)); 5818 ifa_release(ifa, &psref); 5819 } 5820 5821 if (dst) 5822 memcpy(dst, &ddst, sizeof(*dst)); 5823 if (src) 5824 memcpy(src, &ssrc, sizeof(*src)); 5825 } 5826 5827 #ifdef IPV6CP_MYIFID_DYN 5828 /* 5829 * Generate random ifid. 5830 */ 5831 static void 5832 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 5833 { 5834 /* TBD */ 5835 } 5836 5837 /* 5838 * Set my IPv6 address. Must be called at splnet. 5839 */ 5840 static void 5841 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 5842 { 5843 STDDCL; 5844 struct ifaddr *ifa; 5845 struct sockaddr_in6 *sin6; 5846 int s; 5847 struct psref psref; 5848 5849 KASSERT(SPPP_WLOCKED(sp)); 5850 SPPP_UNLOCK(sp); 5851 IFNET_LOCK(ifp); 5852 SPPP_LOCK(sp, RW_WRITER); 5853 5854 /* 5855 * Pick the first link-local AF_INET6 address from the list, 5856 * aliases don't make any sense on a p2p link anyway. 5857 */ 5858 5859 sin6 = NULL; 5860 s = pserialize_read_enter(); 5861 IFADDR_READER_FOREACH(ifa, ifp) 5862 { 5863 if (ifa->ifa_addr->sa_family == AF_INET6) 5864 { 5865 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 5866 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 5867 ifa_acquire(ifa, &psref); 5868 break; 5869 } 5870 } 5871 } 5872 pserialize_read_exit(s); 5873 5874 if (ifa && sin6) 5875 { 5876 int error; 5877 struct sockaddr_in6 new_sin6 = *sin6; 5878 5879 memcpy(&new_sin6.sin6_addr, src, sizeof(new_sin6.sin6_addr)); 5880 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 5881 if (debug && error) 5882 { 5883 log(LOG_DEBUG, "%s: %s: in6_ifinit failed, error=%d\n", 5884 ifp->if_xname, __func__, error); 5885 } 5886 if (!error) { 5887 pfil_run_addrhooks(if_pfil, SIOCAIFADDR_IN6, ifa); 5888 } 5889 ifa_release(ifa, &psref); 5890 } 5891 5892 IFNET_UNLOCK(ifp); 5893 } 5894 #endif 5895 5896 /* 5897 * Suggest a candidate address to be used by peer. 5898 */ 5899 static void 5900 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 5901 { 5902 struct in6_addr myaddr; 5903 struct timeval tv; 5904 5905 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 5906 5907 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 5908 microtime(&tv); 5909 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 5910 myaddr.s6_addr[14] ^= 0xff; 5911 myaddr.s6_addr[15] ^= 0xff; 5912 } else { 5913 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 5914 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 5915 } 5916 if (suggest) 5917 memcpy(suggest, &myaddr, sizeof(myaddr)); 5918 } 5919 #endif /*INET6*/ 5920 5921 /* 5922 * Process ioctl requests specific to the PPP interface. 5923 * Permissions have already been checked. 5924 */ 5925 static int 5926 sppp_params(struct sppp *sp, u_long cmd, void *data) 5927 { 5928 switch (cmd) { 5929 case SPPPGETAUTHCFG: 5930 { 5931 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5932 int error; 5933 size_t len; 5934 5935 SPPP_LOCK(sp, RW_READER); 5936 5937 cfg->myauthflags = sp->myauth.flags; 5938 cfg->hisauthflags = sp->hisauth.flags; 5939 strlcpy(cfg->ifname, sp->pp_if.if_xname, sizeof(cfg->ifname)); 5940 cfg->hisauth = 0; 5941 if (sp->hisauth.proto) 5942 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5943 cfg->myauth = 0; 5944 if (sp->myauth.proto) 5945 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5946 if (cfg->myname_length == 0) { 5947 if (sp->myauth.name != NULL) 5948 cfg->myname_length = sp->myauth.name_len + 1; 5949 } else { 5950 if (sp->myauth.name == NULL) { 5951 cfg->myname_length = 0; 5952 } else { 5953 len = sp->myauth.name_len + 1; 5954 5955 if (cfg->myname_length < len) { 5956 SPPP_UNLOCK(sp); 5957 return (ENAMETOOLONG); 5958 } 5959 error = copyout(sp->myauth.name, cfg->myname, len); 5960 if (error) { 5961 SPPP_UNLOCK(sp); 5962 return error; 5963 } 5964 } 5965 } 5966 if (cfg->hisname_length == 0) { 5967 if (sp->hisauth.name != NULL) 5968 cfg->hisname_length = sp->hisauth.name_len + 1; 5969 } else { 5970 if (sp->hisauth.name == NULL) { 5971 cfg->hisname_length = 0; 5972 } else { 5973 len = sp->hisauth.name_len + 1; 5974 5975 if (cfg->hisname_length < len) { 5976 SPPP_UNLOCK(sp); 5977 return (ENAMETOOLONG); 5978 } 5979 error = copyout(sp->hisauth.name, cfg->hisname, len); 5980 if (error) { 5981 SPPP_UNLOCK(sp); 5982 return error; 5983 } 5984 } 5985 } 5986 SPPP_UNLOCK(sp); 5987 } 5988 break; 5989 case SPPPSETAUTHCFG: 5990 { 5991 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5992 int error; 5993 5994 SPPP_LOCK(sp, RW_WRITER); 5995 5996 if (sp->myauth.name) { 5997 free(sp->myauth.name, M_DEVBUF); 5998 sp->myauth.name = NULL; 5999 } 6000 if (sp->myauth.secret) { 6001 free(sp->myauth.secret, M_DEVBUF); 6002 sp->myauth.secret = NULL; 6003 } 6004 if (sp->hisauth.name) { 6005 free(sp->hisauth.name, M_DEVBUF); 6006 sp->hisauth.name = NULL; 6007 } 6008 if (sp->hisauth.secret) { 6009 free(sp->hisauth.secret, M_DEVBUF); 6010 sp->hisauth.secret = NULL; 6011 } 6012 6013 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 6014 if (cfg->hisname_length >= MCLBYTES) { 6015 SPPP_UNLOCK(sp); 6016 return (ENAMETOOLONG); 6017 } 6018 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 6019 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 6020 if (error) { 6021 free(sp->hisauth.name, M_DEVBUF); 6022 sp->hisauth.name = NULL; 6023 SPPP_UNLOCK(sp); 6024 return error; 6025 } 6026 sp->hisauth.name_len = cfg->hisname_length - 1; 6027 sp->hisauth.name[sp->hisauth.name_len] = 0; 6028 } 6029 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 6030 if (cfg->hissecret_length >= MCLBYTES) { 6031 SPPP_UNLOCK(sp); 6032 return (ENAMETOOLONG); 6033 } 6034 sp->hisauth.secret = malloc(cfg->hissecret_length, 6035 M_DEVBUF, M_WAITOK); 6036 error = copyin(cfg->hissecret, sp->hisauth.secret, 6037 cfg->hissecret_length); 6038 if (error) { 6039 free(sp->hisauth.secret, M_DEVBUF); 6040 sp->hisauth.secret = NULL; 6041 SPPP_UNLOCK(sp); 6042 return error; 6043 } 6044 sp->hisauth.secret_len = cfg->hissecret_length - 1; 6045 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 6046 } 6047 if (cfg->myname != NULL && cfg->myname_length > 0) { 6048 if (cfg->myname_length >= MCLBYTES) { 6049 SPPP_UNLOCK(sp); 6050 return (ENAMETOOLONG); 6051 } 6052 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 6053 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 6054 if (error) { 6055 free(sp->myauth.name, M_DEVBUF); 6056 sp->myauth.name = NULL; 6057 SPPP_UNLOCK(sp); 6058 return error; 6059 } 6060 sp->myauth.name_len = cfg->myname_length - 1; 6061 sp->myauth.name[sp->myauth.name_len] = 0; 6062 } 6063 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 6064 if (cfg->mysecret_length >= MCLBYTES) { 6065 SPPP_UNLOCK(sp); 6066 return (ENAMETOOLONG); 6067 } 6068 sp->myauth.secret = malloc(cfg->mysecret_length, 6069 M_DEVBUF, M_WAITOK); 6070 error = copyin(cfg->mysecret, sp->myauth.secret, 6071 cfg->mysecret_length); 6072 if (error) { 6073 free(sp->myauth.secret, M_DEVBUF); 6074 sp->myauth.secret = NULL; 6075 SPPP_UNLOCK(sp); 6076 return error; 6077 } 6078 sp->myauth.secret_len = cfg->mysecret_length - 1; 6079 sp->myauth.secret[sp->myauth.secret_len] = 0; 6080 } 6081 sp->myauth.flags = cfg->myauthflags; 6082 if (cfg->myauth) 6083 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 6084 sp->hisauth.flags = cfg->hisauthflags; 6085 if (cfg->hisauth) 6086 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 6087 sp->pp_auth_failures = 0; 6088 if (sp->hisauth.proto != 0) 6089 SET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 6090 else 6091 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 6092 6093 SPPP_UNLOCK(sp); 6094 } 6095 break; 6096 case SPPPGETLCPCFG: 6097 { 6098 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 6099 6100 SPPP_LOCK(sp, RW_READER); 6101 lcpp->lcp_timeout = sp->lcp.timeout; 6102 SPPP_UNLOCK(sp); 6103 } 6104 break; 6105 case SPPPSETLCPCFG: 6106 { 6107 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 6108 6109 SPPP_LOCK(sp, RW_WRITER); 6110 sp->lcp.timeout = lcpp->lcp_timeout; 6111 SPPP_UNLOCK(sp); 6112 } 6113 break; 6114 case SPPPGETSTATUS: 6115 { 6116 struct spppstatus *status = (struct spppstatus *)data; 6117 6118 SPPP_LOCK(sp, RW_READER); 6119 status->phase = sp->pp_phase; 6120 SPPP_UNLOCK(sp); 6121 } 6122 break; 6123 case SPPPGETSTATUSNCP: 6124 { 6125 struct spppstatusncp *status = (struct spppstatusncp *)data; 6126 6127 SPPP_LOCK(sp, RW_READER); 6128 status->phase = sp->pp_phase; 6129 status->ncpup = sppp_cp_check(sp, CP_NCP); 6130 SPPP_UNLOCK(sp); 6131 } 6132 break; 6133 case SPPPGETIDLETO: 6134 { 6135 struct spppidletimeout *to = (struct spppidletimeout *)data; 6136 6137 SPPP_LOCK(sp, RW_READER); 6138 to->idle_seconds = sp->pp_idle_timeout; 6139 SPPP_UNLOCK(sp); 6140 } 6141 break; 6142 case SPPPSETIDLETO: 6143 { 6144 struct spppidletimeout *to = (struct spppidletimeout *)data; 6145 6146 SPPP_LOCK(sp, RW_WRITER); 6147 sp->pp_idle_timeout = to->idle_seconds; 6148 SPPP_UNLOCK(sp); 6149 } 6150 break; 6151 case SPPPSETAUTHFAILURE: 6152 { 6153 struct spppauthfailuresettings *afsettings = 6154 (struct spppauthfailuresettings *)data; 6155 6156 SPPP_LOCK(sp, RW_WRITER); 6157 sp->pp_max_auth_fail = afsettings->max_failures; 6158 sp->pp_auth_failures = 0; 6159 SPPP_UNLOCK(sp); 6160 } 6161 break; 6162 case SPPPGETAUTHFAILURES: 6163 { 6164 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 6165 6166 SPPP_LOCK(sp, RW_READER); 6167 stats->auth_failures = sp->pp_auth_failures; 6168 stats->max_failures = sp->pp_max_auth_fail; 6169 SPPP_UNLOCK(sp); 6170 } 6171 break; 6172 case SPPPSETDNSOPTS: 6173 { 6174 struct spppdnssettings *req = (struct spppdnssettings *)data; 6175 6176 SPPP_LOCK(sp, RW_WRITER); 6177 sp->query_dns = req->query_dns & 3; 6178 SPPP_UNLOCK(sp); 6179 } 6180 break; 6181 case SPPPGETDNSOPTS: 6182 { 6183 struct spppdnssettings *req = (struct spppdnssettings *)data; 6184 6185 SPPP_LOCK(sp, RW_READER); 6186 req->query_dns = sp->query_dns; 6187 SPPP_UNLOCK(sp); 6188 } 6189 break; 6190 case SPPPGETDNSADDRS: 6191 { 6192 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; 6193 6194 SPPP_LOCK(sp, RW_READER); 6195 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 6196 SPPP_UNLOCK(sp); 6197 } 6198 break; 6199 case SPPPGETKEEPALIVE: 6200 { 6201 struct spppkeepalivesettings *settings = 6202 (struct spppkeepalivesettings*)data; 6203 6204 SPPP_LOCK(sp, RW_READER); 6205 settings->maxalive = sp->pp_maxalive; 6206 settings->max_noreceive = sp->pp_max_noreceive; 6207 SPPP_UNLOCK(sp); 6208 } 6209 break; 6210 case SPPPSETKEEPALIVE: 6211 { 6212 struct spppkeepalivesettings *settings = 6213 (struct spppkeepalivesettings*)data; 6214 6215 SPPP_LOCK(sp, RW_WRITER); 6216 sp->pp_maxalive = settings->maxalive; 6217 sp->pp_max_noreceive = settings->max_noreceive; 6218 SPPP_UNLOCK(sp); 6219 } 6220 break; 6221 case SPPPGETLCPSTATUS: 6222 { 6223 struct sppplcpstatus *status = 6224 (struct sppplcpstatus *)data; 6225 6226 SPPP_LOCK(sp, RW_READER); 6227 status->state = sp->scp[IDX_LCP].state; 6228 status->opts = sp->lcp.opts; 6229 status->magic = sp->lcp.magic; 6230 status->mru = sp->lcp.mru; 6231 SPPP_UNLOCK(sp); 6232 } 6233 break; 6234 case SPPPGETIPCPSTATUS: 6235 { 6236 struct spppipcpstatus *status = 6237 (struct spppipcpstatus *)data; 6238 u_int32_t myaddr; 6239 6240 SPPP_LOCK(sp, RW_READER); 6241 status->state = sp->scp[IDX_IPCP].state; 6242 status->opts = sp->ipcp.opts; 6243 #ifdef INET 6244 kpreempt_disable(); 6245 sppp_get_ip_addrs(sp, &myaddr, 0, 0); 6246 kpreempt_enable(); 6247 #else 6248 myaddr = 0; 6249 #endif 6250 status->myaddr = ntohl(myaddr); 6251 SPPP_UNLOCK(sp); 6252 } 6253 break; 6254 case SPPPGETIPV6CPSTATUS: 6255 { 6256 struct spppipv6cpstatus *status = 6257 (struct spppipv6cpstatus *)data; 6258 6259 SPPP_LOCK(sp, RW_READER); 6260 status->state = sp->scp[IDX_IPV6CP].state; 6261 memcpy(status->my_ifid, sp->ipv6cp.my_ifid, 6262 sizeof(status->my_ifid)); 6263 memcpy(status->his_ifid, sp->ipv6cp.his_ifid, 6264 sizeof(status->his_ifid)); 6265 SPPP_UNLOCK(sp); 6266 } 6267 break; 6268 default: 6269 { 6270 int ret; 6271 6272 MODULE_HOOK_CALL(sppp_params_50_hook, (sp, cmd, data), 6273 enosys(), ret); 6274 if (ret != ENOSYS) 6275 return ret; 6276 return (EINVAL); 6277 } 6278 } 6279 return (0); 6280 } 6281 6282 static void 6283 sppp_phase_network(struct sppp *sp) 6284 { 6285 int i; 6286 6287 KASSERT(SPPP_WLOCKED(sp)); 6288 6289 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 6290 6291 /* Notify NCPs now. */ 6292 for (i = 0; i < IDX_COUNT; i++) 6293 if ((cps[i])->flags & CP_NCP) 6294 sppp_wq_add(sp->wq_cp, &sp->scp[i].work_open); 6295 } 6296 6297 static const char * 6298 sppp_cp_type_name(u_char type) 6299 { 6300 static char buf[12]; 6301 switch (type) { 6302 case CONF_REQ: return "conf-req"; 6303 case CONF_ACK: return "conf-ack"; 6304 case CONF_NAK: return "conf-nak"; 6305 case CONF_REJ: return "conf-rej"; 6306 case TERM_REQ: return "term-req"; 6307 case TERM_ACK: return "term-ack"; 6308 case CODE_REJ: return "code-rej"; 6309 case PROTO_REJ: return "proto-rej"; 6310 case ECHO_REQ: return "echo-req"; 6311 case ECHO_REPLY: return "echo-reply"; 6312 case DISC_REQ: return "discard-req"; 6313 } 6314 snprintf(buf, sizeof(buf), "0x%x", type); 6315 return buf; 6316 } 6317 6318 static const char * 6319 sppp_auth_type_name(u_short proto, u_char type) 6320 { 6321 static char buf[32]; 6322 const char *name; 6323 6324 switch (proto) { 6325 case PPP_CHAP: 6326 switch (type) { 6327 case CHAP_CHALLENGE: return "challenge"; 6328 case CHAP_RESPONSE: return "response"; 6329 case CHAP_SUCCESS: return "success"; 6330 case CHAP_FAILURE: return "failure"; 6331 default: name = "chap"; break; 6332 } 6333 break; 6334 6335 case PPP_PAP: 6336 switch (type) { 6337 case PAP_REQ: return "req"; 6338 case PAP_ACK: return "ack"; 6339 case PAP_NAK: return "nak"; 6340 default: name = "pap"; break; 6341 } 6342 break; 6343 6344 default: 6345 name = "bad"; 6346 break; 6347 } 6348 6349 snprintf(buf, sizeof(buf), "%s(%#x) %#x", name, proto, type); 6350 return buf; 6351 } 6352 6353 static const char * 6354 sppp_lcp_opt_name(u_char opt) 6355 { 6356 static char buf[12]; 6357 switch (opt) { 6358 case LCP_OPT_MRU: return "mru"; 6359 case LCP_OPT_ASYNC_MAP: return "async-map"; 6360 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 6361 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 6362 case LCP_OPT_MAGIC: return "magic"; 6363 case LCP_OPT_PROTO_COMP: return "proto-comp"; 6364 case LCP_OPT_ADDR_COMP: return "addr-comp"; 6365 case LCP_OPT_SELF_DESC_PAD: return "sdpad"; 6366 case LCP_OPT_CALL_BACK: return "callback"; 6367 case LCP_OPT_COMPOUND_FRMS: return "cmpd-frms"; 6368 case LCP_OPT_MP_MRRU: return "mrru"; 6369 case LCP_OPT_MP_SSNHF: return "mp-ssnhf"; 6370 case LCP_OPT_MP_EID: return "mp-eid"; 6371 } 6372 snprintf(buf, sizeof(buf), "0x%x", opt); 6373 return buf; 6374 } 6375 6376 static const char * 6377 sppp_ipcp_opt_name(u_char opt) 6378 { 6379 static char buf[12]; 6380 switch (opt) { 6381 case IPCP_OPT_ADDRESSES: return "addresses"; 6382 case IPCP_OPT_COMPRESSION: return "compression"; 6383 case IPCP_OPT_ADDRESS: return "address"; 6384 case IPCP_OPT_PRIMDNS: return "primdns"; 6385 case IPCP_OPT_SECDNS: return "secdns"; 6386 } 6387 snprintf(buf, sizeof(buf), "0x%x", opt); 6388 return buf; 6389 } 6390 6391 #ifdef INET6 6392 static const char * 6393 sppp_ipv6cp_opt_name(u_char opt) 6394 { 6395 static char buf[12]; 6396 switch (opt) { 6397 case IPV6CP_OPT_IFID: return "ifid"; 6398 case IPV6CP_OPT_COMPRESSION: return "compression"; 6399 } 6400 snprintf(buf, sizeof(buf), "0x%x", opt); 6401 return buf; 6402 } 6403 #endif 6404 6405 static const char * 6406 sppp_state_name(int state) 6407 { 6408 switch (state) { 6409 case STATE_INITIAL: return "initial"; 6410 case STATE_STARTING: return "starting"; 6411 case STATE_CLOSED: return "closed"; 6412 case STATE_STOPPED: return "stopped"; 6413 case STATE_CLOSING: return "closing"; 6414 case STATE_STOPPING: return "stopping"; 6415 case STATE_REQ_SENT: return "req-sent"; 6416 case STATE_ACK_RCVD: return "ack-rcvd"; 6417 case STATE_ACK_SENT: return "ack-sent"; 6418 case STATE_OPENED: return "opened"; 6419 } 6420 return "illegal"; 6421 } 6422 6423 static const char * 6424 sppp_phase_name(int phase) 6425 { 6426 switch (phase) { 6427 case SPPP_PHASE_DEAD: return "dead"; 6428 case SPPP_PHASE_ESTABLISH: return "establish"; 6429 case SPPP_PHASE_TERMINATE: return "terminate"; 6430 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 6431 case SPPP_PHASE_NETWORK: return "network"; 6432 } 6433 return "illegal"; 6434 } 6435 6436 static const char * 6437 sppp_proto_name(u_short proto) 6438 { 6439 static char buf[12]; 6440 switch (proto) { 6441 case PPP_LCP: return "lcp"; 6442 case PPP_IPCP: return "ipcp"; 6443 case PPP_PAP: return "pap"; 6444 case PPP_CHAP: return "chap"; 6445 case PPP_IPV6CP: return "ipv6cp"; 6446 } 6447 snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto); 6448 return buf; 6449 } 6450 6451 static void 6452 sppp_print_bytes(const u_char *p, u_short len) 6453 { 6454 addlog(" %02x", *p++); 6455 while (--len > 0) 6456 addlog("-%02x", *p++); 6457 } 6458 6459 static void 6460 sppp_print_string(const char *p, u_short len) 6461 { 6462 u_char c; 6463 6464 while (len-- > 0) { 6465 c = *p++; 6466 /* 6467 * Print only ASCII chars directly. RFC 1994 recommends 6468 * using only them, but we don't rely on it. */ 6469 if (c < ' ' || c > '~') 6470 addlog("\\x%x", c); 6471 else 6472 addlog("%c", c); 6473 } 6474 } 6475 6476 static const char * 6477 sppp_dotted_quad(uint32_t addr) 6478 { 6479 static char s[16]; 6480 snprintf(s, sizeof(s), "%d.%d.%d.%d", 6481 (int)((addr >> 24) & 0xff), 6482 (int)((addr >> 16) & 0xff), 6483 (int)((addr >> 8) & 0xff), 6484 (int)(addr & 0xff)); 6485 return s; 6486 } 6487 6488 /* a dummy, used to drop uninteresting events */ 6489 static void 6490 sppp_null(struct sppp *unused) 6491 { 6492 /* do just nothing */ 6493 } 6494 6495 static void 6496 sppp_tls(const struct cp *cp, struct sppp *sp) 6497 { 6498 6499 /* notify lcp that is lower layer */ 6500 sp->lcp.protos |= (1 << cp->protoidx); 6501 6502 if (sp->scp[IDX_LCP].state == STATE_OPENED) 6503 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_up); 6504 } 6505 6506 static void 6507 sppp_tlf(const struct cp *cp, struct sppp *sp) 6508 { 6509 STDDCL; 6510 6511 if (debug) 6512 log(LOG_DEBUG, "%s: %s tlf\n", ifp->if_xname, cp->name); 6513 6514 /* notify lcp that is lower layer */ 6515 sp->lcp.protos &= ~(1 << cp->protoidx); 6516 6517 /* cleanup */ 6518 if (sp->scp[cp->protoidx].mbuf_confreq != NULL) { 6519 m_freem(sp->scp[cp->protoidx].mbuf_confreq); 6520 sp->scp[cp->protoidx].mbuf_confreq = NULL; 6521 } 6522 if (sp->scp[cp->protoidx].mbuf_confnak != NULL) { 6523 m_freem(sp->scp[cp->protoidx].mbuf_confnak); 6524 sp->scp[cp->protoidx].mbuf_confnak = NULL; 6525 } 6526 6527 sppp_lcp_check_and_close(sp); 6528 } 6529 6530 static void 6531 sppp_screply(const struct cp *cp, struct sppp *sp, u_char type, 6532 uint8_t ident, size_t msglen, void *msg) 6533 { 6534 STDDCL; 6535 6536 if (msglen == 0) 6537 return; 6538 6539 switch (type) { 6540 case CONF_ACK: 6541 case CONF_NAK: 6542 case CONF_REJ: 6543 break; 6544 default: 6545 return; 6546 } 6547 6548 if (debug) { 6549 log(LOG_DEBUG, "%s: send %s\n", 6550 ifp->if_xname, sppp_cp_type_name(type)); 6551 } 6552 6553 sppp_cp_send(sp, cp->proto, type, ident, msglen, msg); 6554 } 6555 6556 static void 6557 sppp_ifdown(struct sppp *sp, void *xcp __unused) 6558 { 6559 6560 SPPP_UNLOCK(sp); 6561 if_down(&sp->pp_if); 6562 IF_PURGE(&sp->pp_cpq); 6563 SPPP_LOCK(sp, RW_WRITER); 6564 } 6565 6566 static void 6567 sppp_notify_up(struct sppp *sp) 6568 { 6569 6570 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_up); 6571 } 6572 6573 static void 6574 sppp_notify_down(struct sppp *sp) 6575 { 6576 6577 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_down); 6578 } 6579 6580 static void 6581 sppp_notify_tls_wlocked(struct sppp *sp) 6582 { 6583 6584 KASSERT(SPPP_WLOCKED(sp)); 6585 6586 if (!sp->pp_tls) 6587 return; 6588 6589 SPPP_UNLOCK(sp); 6590 sp->pp_tls(sp); 6591 SPPP_LOCK(sp, RW_WRITER); 6592 } 6593 6594 static void 6595 sppp_notify_tlf_wlocked(struct sppp *sp) 6596 { 6597 6598 KASSERT(SPPP_WLOCKED(sp)); 6599 6600 if (!sp->pp_tlf) 6601 return; 6602 6603 SPPP_UNLOCK(sp); 6604 sp->pp_tlf(sp); 6605 SPPP_LOCK(sp, RW_WRITER); 6606 } 6607 6608 static void 6609 sppp_notify_con(struct sppp *sp) 6610 { 6611 6612 if (!sp->pp_con) 6613 return; 6614 6615 sp->pp_con(sp); 6616 } 6617 6618 #ifdef INET6 6619 static void 6620 sppp_notify_con_wlocked(struct sppp *sp) 6621 { 6622 6623 KASSERT(SPPP_WLOCKED(sp)); 6624 6625 SPPP_UNLOCK(sp); 6626 sppp_notify_con(sp); 6627 SPPP_LOCK(sp, RW_WRITER); 6628 6629 } 6630 #endif 6631 6632 static void 6633 sppp_notify_chg_wlocked(struct sppp *sp) 6634 { 6635 6636 KASSERT(SPPP_WLOCKED(sp)); 6637 6638 if (!sp->pp_chg) 6639 return; 6640 6641 SPPP_UNLOCK(sp); 6642 sp->pp_chg(sp, sp->pp_phase); 6643 SPPP_LOCK(sp, RW_WRITER); 6644 } 6645 6646 static void 6647 sppp_wq_work(struct work *wk, void *xsp) 6648 { 6649 struct sppp *sp; 6650 struct sppp_work *work; 6651 6652 sp = xsp; 6653 work = container_of(wk, struct sppp_work, work); 6654 atomic_cas_uint(&work->state, SPPP_WK_BUSY, SPPP_WK_FREE); 6655 6656 SPPP_LOCK(sp, RW_WRITER); 6657 work->func(sp, work->arg); 6658 SPPP_UNLOCK(sp); 6659 } 6660 6661 static struct workqueue * 6662 sppp_wq_create(struct sppp *sp, const char *xnamebuf, pri_t prio, int ipl, int flags) 6663 { 6664 struct workqueue *wq; 6665 int error; 6666 6667 error = workqueue_create(&wq, xnamebuf, sppp_wq_work, 6668 (void *)sp, prio, ipl, flags); 6669 if (error) { 6670 panic("%s: workqueue_create failed [%s, %d]\n", 6671 sp->pp_if.if_xname, xnamebuf, error); 6672 } 6673 6674 return wq; 6675 } 6676 6677 static void 6678 sppp_wq_destroy(struct sppp *sp __unused, struct workqueue *wq) 6679 { 6680 6681 workqueue_destroy(wq); 6682 } 6683 6684 static void 6685 sppp_wq_set(struct sppp_work *work, 6686 void (*func)(struct sppp *, void *), void *arg) 6687 { 6688 6689 work->func = func; 6690 work->arg = arg; 6691 } 6692 6693 static void 6694 sppp_wq_add(struct workqueue *wq, struct sppp_work *work) 6695 { 6696 6697 if (atomic_cas_uint(&work->state, SPPP_WK_FREE, SPPP_WK_BUSY) 6698 != SPPP_WK_FREE) 6699 return; 6700 6701 KASSERT(work->func != NULL); 6702 kpreempt_disable(); 6703 workqueue_enqueue(wq, &work->work, NULL); 6704 kpreempt_enable(); 6705 } 6706 static void 6707 sppp_wq_wait(struct workqueue *wq, struct sppp_work *work) 6708 { 6709 6710 atomic_swap_uint(&work->state, SPPP_WK_UNAVAIL); 6711 workqueue_wait(wq, &work->work); 6712 } 6713 6714 /* 6715 * This file is large. Tell emacs to highlight it nevertheless. 6716 * 6717 * Local Variables: 6718 * hilit-auto-highlight-maxout: 120000 6719 * End: 6720 */ 6721 6722 /* 6723 * Module glue 6724 */ 6725 MODULE(MODULE_CLASS_MISC, sppp_subr, NULL); 6726 6727 static int 6728 sppp_subr_modcmd(modcmd_t cmd, void *arg) 6729 { 6730 6731 switch (cmd) { 6732 case MODULE_CMD_INIT: 6733 case MODULE_CMD_FINI: 6734 return 0; 6735 case MODULE_CMD_STAT: 6736 case MODULE_CMD_AUTOUNLOAD: 6737 default: 6738 return ENOTTY; 6739 } 6740 } 6741
Indexes created Fri Sep 26 08:10:20 GMT 2025