if_spppsubr.c revision 1.223
1 /* $NetBSD: if_spppsubr.c,v 1.223 2021/04/26 08:34:22 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 1.223 2021/04/26 08:34:22 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 (*scan)(const struct cp *, struct sppp *); 262 263 /* message parser */ 264 enum cp_rcr_type 265 (*parse_confreq)(struct sppp *, struct lcp_header *, int, 266 uint8_t **, size_t *, size_t *); 267 void (*parse_confrej)(struct sppp *, struct lcp_header *, int); 268 void (*parse_confnak)(struct sppp *, struct lcp_header *, int); 269 }; 270 271 enum auth_role { 272 SPPP_AUTH_NOROLE = 0, 273 SPPP_AUTH_SERV = __BIT(0), 274 SPPP_AUTH_PEER = __BIT(1), 275 }; 276 277 static struct sppp *spppq; 278 static kmutex_t *spppq_lock = NULL; 279 static callout_t keepalive_ch; 280 281 #define SPPPQ_LOCK() if (spppq_lock) \ 282 mutex_enter(spppq_lock); 283 #define SPPPQ_UNLOCK() if (spppq_lock) \ 284 mutex_exit(spppq_lock); 285 286 #define SPPP_LOCK(_sp, _op) rw_enter(&(_sp)->pp_lock, (_op)) 287 #define SPPP_UNLOCK(_sp) rw_exit(&(_sp)->pp_lock) 288 #define SPPP_WLOCKED(_sp) rw_write_held(&(_sp)->pp_lock) 289 #define SPPP_UPGRADE(_sp) do{ \ 290 SPPP_UNLOCK(_sp); \ 291 SPPP_LOCK(_sp, RW_WRITER); \ 292 }while (0) 293 #define SPPP_DOWNGRADE(_sp) rw_downgrade(&(_sp)->pp_lock) 294 #define SPPP_WQ_SET(_wk, _func, _arg) \ 295 sppp_wq_set((_wk), (_func), __UNCONST((_arg))) 296 297 #ifdef INET 298 #ifndef SPPPSUBR_MPSAFE 299 /* 300 * The following disgusting hack gets around the problem that IP TOS 301 * can't be set yet. We want to put "interactive" traffic on a high 302 * priority queue. To decide if traffic is interactive, we check that 303 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 304 * 305 * XXX is this really still necessary? - joerg - 306 */ 307 static u_short interactive_ports[8] = { 308 0, 513, 0, 0, 309 0, 21, 0, 23, 310 }; 311 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 312 #endif /* SPPPSUBR_MPSAFE */ 313 #endif 314 315 /* almost every function needs these */ 316 #define STDDCL \ 317 struct ifnet *ifp = &sp->pp_if; \ 318 int debug = ifp->if_flags & IFF_DEBUG 319 320 static int sppp_output(struct ifnet *, struct mbuf *, 321 const struct sockaddr *, const struct rtentry *); 322 323 static void sppp_cisco_send(struct sppp *, int, int32_t, int32_t); 324 static void sppp_cisco_input(struct sppp *, struct mbuf *); 325 326 static void sppp_cp_init(const struct cp *, struct sppp *); 327 static void sppp_cp_fini(const struct cp *, struct sppp *); 328 static void sppp_cp_input(const struct cp *, struct sppp *, 329 struct mbuf *); 330 static void sppp_cp_input(const struct cp *, struct sppp *, 331 struct mbuf *); 332 static void sppp_cp_send(struct sppp *, u_short, u_char, 333 u_char, u_short, void *); 334 /* static void sppp_cp_timeout(void *arg); */ 335 static void sppp_cp_change_state(const struct cp *, struct sppp *, int); 336 static struct workqueue * 337 sppp_wq_create(struct sppp *, const char *, pri_t, int, int); 338 static void sppp_wq_destroy(struct sppp *, struct workqueue *); 339 static void sppp_wq_set(struct sppp_work *, 340 void (*)(struct sppp *, void *), void *); 341 static void sppp_wq_add(struct workqueue *, struct sppp_work *); 342 static void sppp_wq_wait(struct workqueue *, struct sppp_work *); 343 static void sppp_cp_to_lcp(void *); 344 static void sppp_cp_to_ipcp(void *); 345 static void sppp_cp_to_ipv6cp(void *); 346 static void sppp_auth_send(const struct cp *, struct sppp *, 347 unsigned int, unsigned int, ...); 348 static int sppp_auth_role(const struct cp *, struct sppp *); 349 static void sppp_auth_to_event(struct sppp *, void *); 350 static void sppp_auth_sca_scn(const struct cp *, struct sppp *); 351 352 static void sppp_up_event(struct sppp *, void *); 353 static void sppp_down_event(struct sppp *, void *); 354 static void sppp_open_event(struct sppp *, void *); 355 static void sppp_close_event(struct sppp *, void *); 356 static void sppp_to_event(struct sppp *, void *); 357 static void sppp_rcr_event(struct sppp *, void *); 358 static void sppp_rca_event(struct sppp *, void *); 359 static void sppp_rcn_event(struct sppp *, void *); 360 static void sppp_rtr_event(struct sppp *, void *); 361 static void sppp_rta_event(struct sppp *, void *); 362 static void sppp_rxj_event(struct sppp *, void *); 363 364 static void sppp_null(struct sppp *); 365 static void sppp_tls(const struct cp *, struct sppp *); 366 static void sppp_tlf(const struct cp *, struct sppp *); 367 static void sppp_sca_scn(const struct cp *, struct sppp *); 368 static void sppp_ifdown(struct sppp *, void *); 369 370 static void sppp_lcp_init(struct sppp *); 371 static void sppp_lcp_up(struct sppp *, void *); 372 static void sppp_lcp_down(struct sppp *, void *); 373 static void sppp_lcp_open(struct sppp *, void *); 374 static enum cp_rcr_type 375 sppp_lcp_confreq(struct sppp *, struct lcp_header *, int, 376 uint8_t **, size_t *, size_t *); 377 static void sppp_lcp_confrej(struct sppp *, struct lcp_header *, int); 378 static void sppp_lcp_confnak(struct sppp *, struct lcp_header *, int); 379 static void sppp_lcp_tlu(struct sppp *); 380 static void sppp_lcp_tld(struct sppp *); 381 static void sppp_lcp_tls(const struct cp *, struct sppp *); 382 static void sppp_lcp_tlf(const struct cp *, struct sppp *); 383 static void sppp_lcp_scr(struct sppp *); 384 static void sppp_lcp_check_and_close(struct sppp *); 385 static int sppp_cp_check(struct sppp *, u_char); 386 387 static void sppp_ipcp_init(struct sppp *); 388 static void sppp_ipcp_open(struct sppp *, void *); 389 static void sppp_ipcp_close(struct sppp *, void *); 390 static enum cp_rcr_type 391 sppp_ipcp_confreq(struct sppp *, struct lcp_header *, int, 392 uint8_t **, size_t *, size_t *); 393 static void sppp_ipcp_confrej(struct sppp *, struct lcp_header *, int); 394 static void sppp_ipcp_confnak(struct sppp *, struct lcp_header *, int); 395 static void sppp_ipcp_tlu(struct sppp *); 396 static void sppp_ipcp_scr(struct sppp *); 397 398 static void sppp_ipv6cp_init(struct sppp *); 399 static void sppp_ipv6cp_open(struct sppp *, void *); 400 static enum cp_rcr_type 401 sppp_ipv6cp_confreq(struct sppp *, struct lcp_header *, int, 402 uint8_t **, size_t *, size_t *); 403 static void sppp_ipv6cp_confrej(struct sppp *, struct lcp_header *, int); 404 static void sppp_ipv6cp_confnak(struct sppp *, struct lcp_header *, int); 405 static void sppp_ipv6cp_tlu(struct sppp *); 406 static void sppp_ipv6cp_scr(struct sppp *); 407 408 static void sppp_pap_input(struct sppp *, struct mbuf *); 409 static void sppp_pap_init(struct sppp *); 410 static void sppp_pap_tlu(struct sppp *); 411 static void sppp_pap_scr(struct sppp *); 412 static void sppp_pap_scr(struct sppp *); 413 414 static void sppp_chap_input(struct sppp *, struct mbuf *); 415 static void sppp_chap_init(struct sppp *); 416 static void sppp_chap_open(struct sppp *, void *); 417 static void sppp_chap_tlu(struct sppp *); 418 static void sppp_chap_scr(struct sppp *); 419 static void sppp_chap_rcv_challenge_event(struct sppp *, void *); 420 421 static const char *sppp_auth_type_name(u_short, u_char); 422 static const char *sppp_cp_type_name(u_char); 423 static const char *sppp_dotted_quad(uint32_t); 424 static const char *sppp_ipcp_opt_name(u_char); 425 #ifdef INET6 426 static const char *sppp_ipv6cp_opt_name(u_char); 427 #endif 428 static const char *sppp_lcp_opt_name(u_char); 429 static const char *sppp_phase_name(int); 430 static const char *sppp_proto_name(u_short); 431 static const char *sppp_state_name(int); 432 static int sppp_params(struct sppp *, u_long, void *); 433 #ifdef INET 434 static void sppp_get_ip_addrs(struct sppp *, uint32_t *, uint32_t *, uint32_t *); 435 static void sppp_set_ip_addrs(struct sppp *); 436 static void sppp_clear_ip_addrs(struct sppp *); 437 #endif 438 static void sppp_keepalive(void *); 439 static void sppp_phase_network(struct sppp *); 440 static void sppp_print_bytes(const u_char *, u_short); 441 static void sppp_print_string(const char *, u_short); 442 #ifdef INET6 443 static void sppp_get_ip6_addrs(struct sppp *, struct in6_addr *, 444 struct in6_addr *, struct in6_addr *); 445 #ifdef IPV6CP_MYIFID_DYN 446 static void sppp_set_ip6_addr(struct sppp *, const struct in6_addr *); 447 static void sppp_gen_ip6_addr(struct sppp *, const struct in6_addr *); 448 #endif 449 static void sppp_suggest_ip6_addr(struct sppp *, struct in6_addr *); 450 #endif 451 452 static void sppp_notify_up(struct sppp *); 453 static void sppp_notify_down(struct sppp *); 454 static void sppp_notify_tls_wlocked(struct sppp *); 455 static void sppp_notify_tlf_wlocked(struct sppp *); 456 #ifdef INET6 457 static void sppp_notify_con_wlocked(struct sppp *); 458 #endif 459 static void sppp_notify_con(struct sppp *); 460 461 static void sppp_notify_chg_wlocked(struct sppp *); 462 463 /* our control protocol descriptors */ 464 static const struct cp lcp = { 465 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 466 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, 467 sppp_close_event, sppp_to_event, 468 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, 469 sppp_lcp_tlf, sppp_lcp_scr, sppp_sca_scn, 470 sppp_lcp_confreq, sppp_lcp_confrej, sppp_lcp_confnak 471 }; 472 473 static const struct cp ipcp = { 474 PPP_IPCP, IDX_IPCP, 475 #ifdef INET 476 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 477 #else 478 0, 479 #endif 480 "ipcp", 481 sppp_up_event, sppp_down_event, sppp_ipcp_open, 482 sppp_ipcp_close, sppp_to_event, 483 sppp_ipcp_tlu, sppp_null, sppp_tls, 484 sppp_tlf, sppp_ipcp_scr, sppp_sca_scn, 485 sppp_ipcp_confreq, sppp_ipcp_confrej, sppp_ipcp_confnak, 486 }; 487 488 static const struct cp ipv6cp = { 489 PPP_IPV6CP, IDX_IPV6CP, 490 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 491 CP_NCP, 492 #else 493 0, 494 #endif 495 "ipv6cp", 496 sppp_up_event, sppp_down_event, sppp_ipv6cp_open, 497 sppp_close_event, sppp_to_event, 498 sppp_ipv6cp_tlu, sppp_null, sppp_tls, 499 sppp_tlf, sppp_ipv6cp_scr, sppp_sca_scn, 500 sppp_ipv6cp_confreq, sppp_ipv6cp_confrej, sppp_ipv6cp_confnak, 501 }; 502 503 static const struct cp pap = { 504 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 505 sppp_up_event, sppp_down_event, sppp_open_event, 506 sppp_close_event, sppp_to_event, 507 sppp_pap_tlu, sppp_null, sppp_tls, sppp_tlf, 508 sppp_pap_scr, sppp_auth_sca_scn, 509 NULL, NULL, NULL 510 }; 511 512 static const struct cp chap = { 513 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 514 sppp_up_event, sppp_down_event, sppp_chap_open, 515 sppp_close_event, sppp_auth_to_event, 516 sppp_chap_tlu, sppp_null, sppp_tls, sppp_tlf, 517 sppp_chap_scr, sppp_auth_sca_scn, 518 NULL, NULL, NULL 519 }; 520 521 static const struct cp *cps[IDX_COUNT] = { 522 &lcp, /* IDX_LCP */ 523 &ipcp, /* IDX_IPCP */ 524 &ipv6cp, /* IDX_IPV6CP */ 525 &pap, /* IDX_PAP */ 526 &chap, /* IDX_CHAP */ 527 }; 528 529 static void 530 sppp_change_phase(struct sppp *sp, int phase) 531 { 532 STDDCL; 533 534 KASSERT(SPPP_WLOCKED(sp)); 535 536 if (sp->pp_phase == phase) 537 return; 538 539 sp->pp_phase = phase; 540 541 if (phase == SPPP_PHASE_NETWORK) 542 if_link_state_change(ifp, LINK_STATE_UP); 543 else 544 if_link_state_change(ifp, LINK_STATE_DOWN); 545 546 if (debug) 547 { 548 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 549 sppp_phase_name(sp->pp_phase)); 550 } 551 } 552 553 /* 554 * Exported functions, comprising our interface to the lower layer. 555 */ 556 557 /* 558 * Process the received packet. 559 */ 560 void 561 sppp_input(struct ifnet *ifp, struct mbuf *m) 562 { 563 struct ppp_header *h = NULL; 564 pktqueue_t *pktq = NULL; 565 struct ifqueue *inq = NULL; 566 uint16_t protocol; 567 struct sppp *sp = (struct sppp *)ifp; 568 int debug = ifp->if_flags & IFF_DEBUG; 569 int isr = 0; 570 571 SPPP_LOCK(sp, RW_READER); 572 573 if (ifp->if_flags & IFF_UP) { 574 /* Count received bytes, add hardware framing */ 575 if_statadd(ifp, if_ibytes, m->m_pkthdr.len + sp->pp_framebytes); 576 /* Note time of last receive */ 577 sp->pp_last_receive = time_uptime; 578 } 579 580 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 581 /* Too small packet, drop it. */ 582 if (debug) 583 log(LOG_DEBUG, 584 "%s: input packet is too small, %d bytes\n", 585 ifp->if_xname, m->m_pkthdr.len); 586 drop: 587 if_statadd2(ifp, if_ierrors, 1, if_iqdrops, 1); 588 m_freem(m); 589 SPPP_UNLOCK(sp); 590 return; 591 } 592 593 if (sp->pp_flags & PP_NOFRAMING) { 594 memcpy(&protocol, mtod(m, void *), 2); 595 protocol = ntohs(protocol); 596 m_adj(m, 2); 597 } else { 598 599 /* Get PPP header. */ 600 h = mtod(m, struct ppp_header *); 601 m_adj(m, PPP_HEADER_LEN); 602 603 switch (h->address) { 604 case PPP_ALLSTATIONS: 605 if (h->control != PPP_UI) 606 goto invalid; 607 if (sp->pp_flags & PP_CISCO) { 608 if (debug) 609 log(LOG_DEBUG, 610 "%s: PPP packet in Cisco mode " 611 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 612 ifp->if_xname, 613 h->address, h->control, ntohs(h->protocol)); 614 goto drop; 615 } 616 break; 617 case CISCO_MULTICAST: 618 case CISCO_UNICAST: 619 /* Don't check the control field here (RFC 1547). */ 620 if (! (sp->pp_flags & PP_CISCO)) { 621 if (debug) 622 log(LOG_DEBUG, 623 "%s: Cisco packet in PPP mode " 624 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 625 ifp->if_xname, 626 h->address, h->control, ntohs(h->protocol)); 627 goto drop; 628 } 629 switch (ntohs(h->protocol)) { 630 default: 631 if_statinc(ifp, if_noproto); 632 goto invalid; 633 case CISCO_KEEPALIVE: 634 SPPP_UNLOCK(sp); 635 sppp_cisco_input((struct sppp *) ifp, m); 636 m_freem(m); 637 return; 638 #ifdef INET 639 case ETHERTYPE_IP: 640 pktq = ip_pktq; 641 break; 642 #endif 643 #ifdef INET6 644 case ETHERTYPE_IPV6: 645 pktq = ip6_pktq; 646 break; 647 #endif 648 } 649 goto queue_pkt; 650 default: /* Invalid PPP packet. */ 651 invalid: 652 if (debug) 653 log(LOG_DEBUG, 654 "%s: invalid input packet " 655 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 656 ifp->if_xname, 657 h->address, h->control, ntohs(h->protocol)); 658 goto drop; 659 } 660 protocol = ntohs(h->protocol); 661 } 662 663 switch (protocol) { 664 default: 665 if (sp->scp[IDX_LCP].state == STATE_OPENED) { 666 uint16_t prot = htons(protocol); 667 668 SPPP_UPGRADE(sp); 669 sppp_cp_send(sp, PPP_LCP, PROTO_REJ, 670 ++sp->scp[IDX_LCP].seq, m->m_pkthdr.len + 2, 671 &prot); 672 SPPP_DOWNGRADE(sp); 673 } 674 if (debug) 675 log(LOG_DEBUG, 676 "%s: invalid input protocol " 677 "<proto=0x%x>\n", ifp->if_xname, ntohs(protocol)); 678 if_statinc(ifp, if_noproto); 679 goto drop; 680 case PPP_LCP: 681 SPPP_UNLOCK(sp); 682 sppp_cp_input(&lcp, sp, m); 683 m_freem(m); 684 return; 685 case PPP_PAP: 686 SPPP_UNLOCK(sp); 687 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 688 sppp_pap_input(sp, m); 689 } 690 m_freem(m); 691 return; 692 case PPP_CHAP: 693 SPPP_UNLOCK(sp); 694 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 695 sppp_chap_input(sp, m); 696 } 697 m_freem(m); 698 return; 699 #ifdef INET 700 case PPP_IPCP: 701 SPPP_UNLOCK(sp); 702 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 703 sppp_cp_input(&ipcp, sp, m); 704 } 705 m_freem(m); 706 return; 707 case PPP_IP: 708 if (sp->scp[IDX_IPCP].state == STATE_OPENED) { 709 sp->pp_last_activity = time_uptime; 710 pktq = ip_pktq; 711 } 712 break; 713 #endif 714 #ifdef INET6 715 case PPP_IPV6CP: 716 SPPP_UNLOCK(sp); 717 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 718 sppp_cp_input(&ipv6cp, sp, m); 719 } 720 m_freem(m); 721 return; 722 723 case PPP_IPV6: 724 if (sp->scp[IDX_IPV6CP].state == STATE_OPENED) { 725 sp->pp_last_activity = time_uptime; 726 pktq = ip6_pktq; 727 } 728 break; 729 #endif 730 } 731 732 queue_pkt: 733 if ((ifp->if_flags & IFF_UP) == 0 || (!inq && !pktq)) { 734 goto drop; 735 } 736 737 /* Check queue. */ 738 if (__predict_true(pktq)) { 739 if (__predict_false(!pktq_enqueue(pktq, m, 0))) { 740 goto drop; 741 } 742 SPPP_UNLOCK(sp); 743 return; 744 } 745 746 SPPP_UNLOCK(sp); 747 748 IFQ_LOCK(inq); 749 if (IF_QFULL(inq)) { 750 /* Queue overflow. */ 751 IF_DROP(inq); 752 IFQ_UNLOCK(inq); 753 if (debug) 754 log(LOG_DEBUG, "%s: protocol queue overflow\n", 755 ifp->if_xname); 756 757 SPPP_LOCK(sp, RW_READER); 758 goto drop; 759 } 760 IF_ENQUEUE(inq, m); 761 IFQ_UNLOCK(inq); 762 schednetisr(isr); 763 } 764 765 /* 766 * Enqueue transmit packet. 767 */ 768 static int 769 sppp_output(struct ifnet *ifp, struct mbuf *m, 770 const struct sockaddr *dst, const struct rtentry *rt) 771 { 772 struct sppp *sp = (struct sppp *) ifp; 773 struct ppp_header *h = NULL; 774 #ifndef SPPPSUBR_MPSAFE 775 struct ifqueue *ifq = NULL; /* XXX */ 776 #endif 777 int s, error = 0; 778 uint16_t protocol; 779 size_t pktlen; 780 781 s = splnet(); 782 SPPP_LOCK(sp, RW_READER); 783 784 sp->pp_last_activity = time_uptime; 785 786 if ((ifp->if_flags & IFF_UP) == 0 || 787 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 788 SPPP_UNLOCK(sp); 789 splx(s); 790 791 m_freem(m); 792 793 return (ENETDOWN); 794 } 795 796 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 797 /* 798 * Interface is not yet running, but auto-dial. Need 799 * to start LCP for it. 800 */ 801 ifp->if_flags |= IFF_RUNNING; 802 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 803 } 804 805 /* 806 * If the queueing discipline needs packet classification, 807 * do it before prepending link headers. 808 */ 809 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family); 810 811 #ifdef INET 812 if (dst->sa_family == AF_INET) { 813 struct ip *ip = NULL; 814 #ifndef SPPPSUBR_MPSAFE 815 struct tcphdr *th = NULL; 816 #endif 817 818 if (m->m_len >= sizeof(struct ip)) { 819 ip = mtod(m, struct ip *); 820 #ifndef SPPPSUBR_MPSAFE 821 if (ip->ip_p == IPPROTO_TCP && 822 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + 823 sizeof(struct tcphdr)) { 824 th = (struct tcphdr *) 825 ((char *)ip + (ip->ip_hl << 2)); 826 } 827 #endif 828 } else 829 ip = NULL; 830 831 /* 832 * When using dynamic local IP address assignment by using 833 * 0.0.0.0 as a local address, the first TCP session will 834 * not connect because the local TCP checksum is computed 835 * using 0.0.0.0 which will later become our real IP address 836 * so the TCP checksum computed at the remote end will 837 * become invalid. So we 838 * - don't let packets with src ip addr 0 thru 839 * - we flag TCP packets with src ip 0 as an error 840 */ 841 if (ip && ip->ip_src.s_addr == INADDR_ANY) { 842 uint8_t proto = ip->ip_p; 843 844 SPPP_UNLOCK(sp); 845 splx(s); 846 847 m_freem(m); 848 if (proto == IPPROTO_TCP) 849 return (EADDRNOTAVAIL); 850 else 851 return (0); 852 } 853 854 #ifndef SPPPSUBR_MPSAFE 855 /* 856 * Put low delay, telnet, rlogin and ftp control packets 857 * in front of the queue. 858 */ 859 if (!IF_QFULL(&sp->pp_fastq) && 860 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 861 (th && (INTERACTIVE(ntohs(th->th_sport)) || 862 INTERACTIVE(ntohs(th->th_dport)))))) 863 ifq = &sp->pp_fastq; 864 #endif /* !SPPPSUBR_MPSAFE */ 865 } 866 #endif 867 868 #ifdef INET6 869 if (dst->sa_family == AF_INET6) { 870 /* XXX do something tricky here? */ 871 } 872 #endif 873 874 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 875 /* 876 * Prepend general data packet PPP header. For now, IP only. 877 */ 878 M_PREPEND(m, PPP_HEADER_LEN, M_DONTWAIT); 879 if (! m) { 880 if (ifp->if_flags & IFF_DEBUG) 881 log(LOG_DEBUG, "%s: no memory for transmit header\n", 882 ifp->if_xname); 883 if_statinc(ifp, if_oerrors); 884 SPPP_UNLOCK(sp); 885 splx(s); 886 return (ENOBUFS); 887 } 888 /* 889 * May want to check size of packet 890 * (albeit due to the implementation it's always enough) 891 */ 892 h = mtod(m, struct ppp_header *); 893 if (sp->pp_flags & PP_CISCO) { 894 h->address = CISCO_UNICAST; /* unicast address */ 895 h->control = 0; 896 } else { 897 h->address = PPP_ALLSTATIONS; /* broadcast address */ 898 h->control = PPP_UI; /* Unnumbered Info */ 899 } 900 } 901 902 switch (dst->sa_family) { 903 #ifdef INET 904 case AF_INET: /* Internet Protocol */ 905 if (sp->pp_flags & PP_CISCO) 906 protocol = htons(ETHERTYPE_IP); 907 else { 908 /* 909 * Don't choke with an ENETDOWN early. It's 910 * possible that we just started dialing out, 911 * so don't drop the packet immediately. If 912 * we notice that we run out of buffer space 913 * below, we will however remember that we are 914 * not ready to carry IP packets, and return 915 * ENETDOWN, as opposed to ENOBUFS. 916 */ 917 protocol = htons(PPP_IP); 918 if (sp->scp[IDX_IPCP].state != STATE_OPENED) 919 error = ENETDOWN; 920 } 921 break; 922 #endif 923 #ifdef INET6 924 case AF_INET6: /* Internet Protocol version 6 */ 925 if (sp->pp_flags & PP_CISCO) 926 protocol = htons(ETHERTYPE_IPV6); 927 else { 928 /* 929 * Don't choke with an ENETDOWN early. It's 930 * possible that we just started dialing out, 931 * so don't drop the packet immediately. If 932 * we notice that we run out of buffer space 933 * below, we will however remember that we are 934 * not ready to carry IP packets, and return 935 * ENETDOWN, as opposed to ENOBUFS. 936 */ 937 protocol = htons(PPP_IPV6); 938 if (sp->scp[IDX_IPV6CP].state != STATE_OPENED) 939 error = ENETDOWN; 940 } 941 break; 942 #endif 943 default: 944 m_freem(m); 945 if_statinc(ifp, if_oerrors); 946 SPPP_UNLOCK(sp); 947 splx(s); 948 return (EAFNOSUPPORT); 949 } 950 951 if (sp->pp_flags & PP_NOFRAMING) { 952 M_PREPEND(m, 2, M_DONTWAIT); 953 if (m == NULL) { 954 if (ifp->if_flags & IFF_DEBUG) 955 log(LOG_DEBUG, "%s: no memory for transmit header\n", 956 ifp->if_xname); 957 if_statinc(ifp, if_oerrors); 958 SPPP_UNLOCK(sp); 959 splx(s); 960 return (ENOBUFS); 961 } 962 *mtod(m, uint16_t *) = protocol; 963 } else { 964 h->protocol = protocol; 965 } 966 967 pktlen = m->m_pkthdr.len; 968 #ifdef SPPPSUBR_MPSAFE 969 SPPP_UNLOCK(sp); 970 error = if_transmit_lock(ifp, m); 971 SPPP_LOCK(sp, RW_READER); 972 if (error == 0) 973 if_statadd(ifp, if_obytes, pktlen + sp->pp_framebytes); 974 #else /* !SPPPSUBR_MPSAFE */ 975 error = ifq_enqueue2(ifp, ifq, m); 976 977 if (error == 0) { 978 /* 979 * Count output packets and bytes. 980 * The packet length includes header + additional hardware 981 * framing according to RFC 1333. 982 */ 983 if (!(ifp->if_flags & IFF_OACTIVE)) { 984 SPPP_UNLOCK(sp); 985 if_start_lock(ifp); 986 SPPP_LOCK(sp, RW_READER); 987 } 988 if_statadd(ifp, if_obytes, pktlen + sp->pp_framebytes); 989 } 990 #endif /* !SPPPSUBR_MPSAFE */ 991 SPPP_UNLOCK(sp); 992 splx(s); 993 return error; 994 } 995 996 void 997 sppp_attach(struct ifnet *ifp) 998 { 999 struct sppp *sp = (struct sppp *) ifp; 1000 char xnamebuf[MAXCOMLEN]; 1001 1002 /* Initialize keepalive handler. */ 1003 if (! spppq) { 1004 callout_init(&keepalive_ch, CALLOUT_MPSAFE); 1005 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 1006 } 1007 1008 if (! spppq_lock) 1009 spppq_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_SOFTNET); 1010 1011 sp->pp_if.if_type = IFT_PPP; 1012 sp->pp_if.if_output = sppp_output; 1013 sp->pp_fastq.ifq_maxlen = 32; 1014 sp->pp_cpq.ifq_maxlen = 20; 1015 sp->pp_loopcnt = 0; 1016 sp->pp_alivecnt = 0; 1017 sp->pp_last_activity = 0; 1018 sp->pp_last_receive = 0; 1019 sp->pp_maxalive = DEFAULT_MAXALIVECNT; 1020 sp->pp_max_noreceive = DEFAULT_NORECV_TIME; 1021 sp->pp_idle_timeout = 0; 1022 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 1023 sp->pp_phase = SPPP_PHASE_DEAD; 1024 sp->pp_up = sppp_notify_up; 1025 sp->pp_down = sppp_notify_down; 1026 sppp_wq_set(&sp->work_ifdown, sppp_ifdown, NULL); 1027 memset(sp->scp, 0, sizeof(sp->scp)); 1028 rw_init(&sp->pp_lock); 1029 1030 if_alloc_sadl(ifp); 1031 1032 /* Lets not beat about the bush, we know we're down. */ 1033 ifp->if_link_state = LINK_STATE_DOWN; 1034 1035 snprintf(xnamebuf, sizeof(xnamebuf), "%s.wq_cp", ifp->if_xname); 1036 sp->wq_cp = sppp_wq_create(sp, xnamebuf, 1037 PRI_SOFTNET, IPL_SOFTNET, WQ_MPSAFE); 1038 1039 memset(&sp->myauth, 0, sizeof sp->myauth); 1040 memset(&sp->hisauth, 0, sizeof sp->hisauth); 1041 SPPP_LOCK(sp, RW_WRITER); 1042 sppp_lcp_init(sp); 1043 sppp_ipcp_init(sp); 1044 sppp_ipv6cp_init(sp); 1045 sppp_pap_init(sp); 1046 sppp_chap_init(sp); 1047 SPPP_UNLOCK(sp); 1048 1049 SPPPQ_LOCK(); 1050 /* Insert new entry into the keepalive list. */ 1051 sp->pp_next = spppq; 1052 spppq = sp; 1053 SPPPQ_UNLOCK(); 1054 } 1055 1056 void 1057 sppp_detach(struct ifnet *ifp) 1058 { 1059 struct sppp **q, *p, *sp = (struct sppp *) ifp; 1060 1061 /* Remove the entry from the keepalive list. */ 1062 SPPPQ_LOCK(); 1063 for (q = &spppq; (p = *q); q = &p->pp_next) 1064 if (p == sp) { 1065 *q = p->pp_next; 1066 break; 1067 } 1068 SPPPQ_UNLOCK(); 1069 1070 if (! spppq) { 1071 /* Stop keepalive handler. */ 1072 callout_stop(&keepalive_ch); 1073 mutex_obj_free(spppq_lock); 1074 spppq_lock = NULL; 1075 } 1076 1077 sppp_cp_fini(&lcp, sp); 1078 sppp_cp_fini(&ipcp, sp); 1079 sppp_cp_fini(&pap, sp); 1080 sppp_cp_fini(&chap, sp); 1081 #ifdef INET6 1082 sppp_cp_fini(&ipv6cp, sp); 1083 #endif 1084 sppp_wq_destroy(sp, sp->wq_cp); 1085 1086 /* free authentication info */ 1087 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 1088 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 1089 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 1090 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 1091 rw_destroy(&sp->pp_lock); 1092 } 1093 1094 /* 1095 * Flush the interface output queue. 1096 */ 1097 void 1098 sppp_flush(struct ifnet *ifp) 1099 { 1100 struct sppp *sp = (struct sppp *) ifp; 1101 1102 SPPP_LOCK(sp, RW_WRITER); 1103 IFQ_PURGE(&sp->pp_if.if_snd); 1104 IF_PURGE(&sp->pp_fastq); 1105 IF_PURGE(&sp->pp_cpq); 1106 SPPP_UNLOCK(sp); 1107 } 1108 1109 /* 1110 * Check if the output queue is empty. 1111 */ 1112 int 1113 sppp_isempty(struct ifnet *ifp) 1114 { 1115 struct sppp *sp = (struct sppp *) ifp; 1116 int empty, s; 1117 1118 s = splnet(); 1119 SPPP_LOCK(sp, RW_READER); 1120 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1121 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1122 SPPP_UNLOCK(sp); 1123 splx(s); 1124 return (empty); 1125 } 1126 1127 /* 1128 * Get next packet to send. 1129 */ 1130 struct mbuf * 1131 sppp_dequeue(struct ifnet *ifp) 1132 { 1133 struct sppp *sp = (struct sppp *) ifp; 1134 struct mbuf *m; 1135 int s; 1136 1137 s = splnet(); 1138 SPPP_LOCK(sp, RW_WRITER); 1139 /* 1140 * Process only the control protocol queue until we have at 1141 * least one NCP open. 1142 * 1143 * Do always serve all three queues in Cisco mode. 1144 */ 1145 IF_DEQUEUE(&sp->pp_cpq, m); 1146 if (m == NULL && 1147 (sppp_cp_check(sp, CP_NCP) || (sp->pp_flags & PP_CISCO) != 0)) { 1148 IF_DEQUEUE(&sp->pp_fastq, m); 1149 if (m == NULL) 1150 IFQ_DEQUEUE(&sp->pp_if.if_snd, m); 1151 } 1152 SPPP_UNLOCK(sp); 1153 splx(s); 1154 return m; 1155 } 1156 1157 /* 1158 * Process an ioctl request. Called on low priority level. 1159 */ 1160 int 1161 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1162 { 1163 struct lwp *l = curlwp; /* XXX */ 1164 struct ifreq *ifr = (struct ifreq *) data; 1165 struct ifaddr *ifa = (struct ifaddr *) data; 1166 struct sppp *sp = (struct sppp *) ifp; 1167 int s, error=0, going_up, going_down; 1168 u_short newmode; 1169 u_long lcp_mru; 1170 1171 s = splnet(); 1172 switch (cmd) { 1173 case SIOCINITIFADDR: 1174 ifa->ifa_rtrequest = p2p_rtrequest; 1175 break; 1176 1177 case SIOCSIFFLAGS: 1178 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1179 break; 1180 1181 SPPP_LOCK(sp, RW_WRITER); 1182 going_up = ifp->if_flags & IFF_UP && 1183 (ifp->if_flags & IFF_RUNNING) == 0; 1184 going_down = (ifp->if_flags & IFF_UP) == 0 && 1185 ifp->if_flags & IFF_RUNNING; 1186 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1187 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1188 /* sanity */ 1189 newmode = IFF_PASSIVE; 1190 ifp->if_flags &= ~IFF_AUTO; 1191 } 1192 1193 if (going_up || going_down) { 1194 sp->lcp.reestablish = false; 1195 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 1196 } 1197 if (going_up && newmode == 0) { 1198 /* neither auto-dial nor passive */ 1199 ifp->if_flags |= IFF_RUNNING; 1200 if (!(sp->pp_flags & PP_CISCO)) { 1201 sppp_wq_add(sp->wq_cp, 1202 &sp->scp[IDX_LCP].work_open); 1203 } 1204 } else if (going_down) { 1205 SPPP_UNLOCK(sp); 1206 sppp_flush(ifp); 1207 SPPP_LOCK(sp, RW_WRITER); 1208 1209 ifp->if_flags &= ~IFF_RUNNING; 1210 } 1211 SPPP_UNLOCK(sp); 1212 break; 1213 1214 case SIOCSIFMTU: 1215 if (ifr->ifr_mtu < PPP_MINMRU || 1216 ifr->ifr_mtu > PP_MTU) { 1217 error = EINVAL; 1218 break; 1219 } 1220 1221 error = ifioctl_common(ifp, cmd, data); 1222 if (error == ENETRESET) 1223 error = 0; 1224 1225 SPPP_LOCK(sp, RW_WRITER); 1226 lcp_mru = sp->lcp.mru; 1227 if (ifp->if_mtu < PP_MTU) { 1228 sp->lcp.mru = ifp->if_mtu; 1229 } else { 1230 sp->lcp.mru = PP_MTU; 1231 } 1232 if (lcp_mru != sp->lcp.mru) 1233 SET(sp->lcp.opts, SPPP_LCP_OPT_MRU); 1234 1235 if (sp->scp[IDX_LCP].state == STATE_OPENED && 1236 ifp->if_mtu > sp->lcp.their_mru) { 1237 sp->pp_saved_mtu = ifp->if_mtu; 1238 ifp->if_mtu = sp->lcp.their_mru; 1239 1240 if (ifp->if_flags & IFF_DEBUG) { 1241 log(LOG_DEBUG, 1242 "%s: setting MTU " 1243 "from %"PRIu64" bytes " 1244 "to %"PRIu64" bytes\n", 1245 ifp->if_xname, sp->pp_saved_mtu, 1246 ifp->if_mtu); 1247 } 1248 } 1249 SPPP_UNLOCK(sp); 1250 break; 1251 1252 case SIOCGIFMTU: 1253 if ((error = ifioctl_common(ifp, cmd, data)) == ENETRESET) 1254 error = 0; 1255 break; 1256 case SIOCADDMULTI: 1257 case SIOCDELMULTI: 1258 break; 1259 1260 case SPPPSETAUTHCFG: 1261 case SPPPSETLCPCFG: 1262 case SPPPSETIDLETO: 1263 case SPPPSETAUTHFAILURE: 1264 case SPPPSETDNSOPTS: 1265 case SPPPSETKEEPALIVE: 1266 #if defined(COMPAT_50) || defined(MODULAR) 1267 case __SPPPSETIDLETO50: 1268 case __SPPPSETKEEPALIVE50: 1269 #endif /* COMPAT_50 || MODULAR */ 1270 error = kauth_authorize_network(l->l_cred, 1271 KAUTH_NETWORK_INTERFACE, 1272 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, 1273 NULL); 1274 if (error) 1275 break; 1276 error = sppp_params(sp, cmd, data); 1277 break; 1278 1279 case SPPPGETAUTHCFG: 1280 case SPPPGETLCPCFG: 1281 case SPPPGETAUTHFAILURES: 1282 error = kauth_authorize_network(l->l_cred, 1283 KAUTH_NETWORK_INTERFACE, 1284 KAUTH_REQ_NETWORK_INTERFACE_GETPRIV, ifp, (void *)cmd, 1285 NULL); 1286 if (error) 1287 break; 1288 error = sppp_params(sp, cmd, data); 1289 break; 1290 1291 case SPPPGETSTATUS: 1292 case SPPPGETSTATUSNCP: 1293 case SPPPGETIDLETO: 1294 case SPPPGETDNSOPTS: 1295 case SPPPGETDNSADDRS: 1296 case SPPPGETKEEPALIVE: 1297 #if defined(COMPAT_50) || defined(MODULAR) 1298 case __SPPPGETIDLETO50: 1299 case __SPPPGETKEEPALIVE50: 1300 #endif /* COMPAT_50 || MODULAR */ 1301 case SPPPGETLCPSTATUS: 1302 case SPPPGETIPCPSTATUS: 1303 case SPPPGETIPV6CPSTATUS: 1304 error = sppp_params(sp, cmd, data); 1305 break; 1306 1307 default: 1308 error = ifioctl_common(ifp, cmd, data); 1309 break; 1310 } 1311 splx(s); 1312 return (error); 1313 } 1314 1315 /* 1316 * Cisco framing implementation. 1317 */ 1318 1319 /* 1320 * Handle incoming Cisco keepalive protocol packets. 1321 */ 1322 static void 1323 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1324 { 1325 STDDCL; 1326 struct cisco_packet *h; 1327 #ifdef INET 1328 uint32_t me, mymask = 0; /* XXX: GCC */ 1329 #endif 1330 1331 SPPP_LOCK(sp, RW_WRITER); 1332 1333 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1334 if (debug) 1335 log(LOG_DEBUG, 1336 "%s: cisco invalid packet length: %d bytes\n", 1337 ifp->if_xname, m->m_pkthdr.len); 1338 SPPP_UNLOCK(sp); 1339 return; 1340 } 1341 h = mtod(m, struct cisco_packet *); 1342 if (debug) 1343 log(LOG_DEBUG, 1344 "%s: cisco input: %d bytes " 1345 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1346 ifp->if_xname, m->m_pkthdr.len, 1347 ntohl(h->type), h->par1, h->par2, (u_int)h->rel, 1348 (u_int)h->time0, (u_int)h->time1); 1349 switch (ntohl(h->type)) { 1350 default: 1351 if (debug) 1352 addlog("%s: cisco unknown packet type: 0x%x\n", 1353 ifp->if_xname, ntohl(h->type)); 1354 break; 1355 case CISCO_ADDR_REPLY: 1356 /* Reply on address request, ignore */ 1357 break; 1358 case CISCO_KEEPALIVE_REQ: 1359 sp->pp_alivecnt = 0; 1360 sp->scp[IDX_LCP].rseq = ntohl(h->par1); 1361 if (sp->scp[IDX_LCP].seq == sp->scp[IDX_LCP].rseq) { 1362 /* Local and remote sequence numbers are equal. 1363 * Probably, the line is in loopback mode. */ 1364 if (sp->pp_loopcnt >= LOOPALIVECNT) { 1365 printf ("%s: loopback\n", 1366 ifp->if_xname); 1367 sp->pp_loopcnt = 0; 1368 if (ifp->if_flags & IFF_UP) { 1369 SPPP_UNLOCK(sp); 1370 if_down(ifp); 1371 SPPP_LOCK(sp, RW_WRITER); 1372 1373 IF_PURGE(&sp->pp_cpq); 1374 } 1375 } 1376 ++sp->pp_loopcnt; 1377 1378 /* Generate new local sequence number */ 1379 sp->scp[IDX_LCP].seq = cprng_fast32(); 1380 break; 1381 } 1382 sp->pp_loopcnt = 0; 1383 if (! (ifp->if_flags & IFF_UP) && 1384 (ifp->if_flags & IFF_RUNNING)) { 1385 SPPP_UNLOCK(sp); 1386 if_up(ifp); 1387 SPPP_LOCK(sp, RW_WRITER); 1388 } 1389 break; 1390 case CISCO_ADDR_REQ: 1391 #ifdef INET 1392 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1393 if (me != 0L) 1394 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1395 #endif 1396 break; 1397 } 1398 SPPP_UNLOCK(sp); 1399 } 1400 1401 /* 1402 * Send Cisco keepalive packet. 1403 */ 1404 static void 1405 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1406 { 1407 STDDCL; 1408 struct ppp_header *h; 1409 struct cisco_packet *ch; 1410 struct mbuf *m; 1411 uint32_t t; 1412 1413 KASSERT(SPPP_WLOCKED(sp)); 1414 1415 t = time_uptime * 1000; 1416 MGETHDR(m, M_DONTWAIT, MT_DATA); 1417 if (! m) 1418 return; 1419 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1420 m_reset_rcvif(m); 1421 1422 h = mtod(m, struct ppp_header *); 1423 h->address = CISCO_MULTICAST; 1424 h->control = 0; 1425 h->protocol = htons(CISCO_KEEPALIVE); 1426 1427 ch = (struct cisco_packet *)(h + 1); 1428 ch->type = htonl(type); 1429 ch->par1 = htonl(par1); 1430 ch->par2 = htonl(par2); 1431 ch->rel = -1; 1432 1433 ch->time0 = htons((u_short)(t >> 16)); 1434 ch->time1 = htons((u_short) t); 1435 1436 if (debug) 1437 log(LOG_DEBUG, 1438 "%s: cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1439 ifp->if_xname, ntohl(ch->type), ch->par1, 1440 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1441 (u_int)ch->time1); 1442 1443 if (IF_QFULL(&sp->pp_cpq)) { 1444 IF_DROP(&sp->pp_fastq); 1445 IF_DROP(&ifp->if_snd); 1446 m_freem(m); 1447 if_statinc(ifp, if_oerrors); 1448 return; 1449 } 1450 1451 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 1452 IF_ENQUEUE(&sp->pp_cpq, m); 1453 1454 if (! (ifp->if_flags & IFF_OACTIVE)) { 1455 SPPP_UNLOCK(sp); 1456 if_start_lock(ifp); 1457 SPPP_LOCK(sp, RW_WRITER); 1458 } 1459 } 1460 1461 /* 1462 * PPP protocol implementation. 1463 */ 1464 1465 /* 1466 * Send PPP control protocol packet. 1467 */ 1468 static void 1469 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1470 u_char ident, u_short len, void *data) 1471 { 1472 STDDCL; 1473 struct lcp_header *lh; 1474 struct mbuf *m; 1475 size_t pkthdrlen; 1476 1477 KASSERT(SPPP_WLOCKED(sp)); 1478 1479 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1480 1481 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1482 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1483 MGETHDR(m, M_DONTWAIT, MT_DATA); 1484 if (! m) { 1485 return; 1486 } 1487 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1488 m_reset_rcvif(m); 1489 1490 if (sp->pp_flags & PP_NOFRAMING) { 1491 *mtod(m, uint16_t *) = htons(proto); 1492 lh = (struct lcp_header *)(mtod(m, uint8_t *) + 2); 1493 } else { 1494 struct ppp_header *h; 1495 h = mtod(m, struct ppp_header *); 1496 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1497 h->control = PPP_UI; /* Unnumbered Info */ 1498 h->protocol = htons(proto); /* Link Control Protocol */ 1499 lh = (struct lcp_header *)(h + 1); 1500 } 1501 lh->type = type; 1502 lh->ident = ident; 1503 lh->len = htons(LCP_HEADER_LEN + len); 1504 if (len) 1505 memcpy(lh + 1, data, len); 1506 1507 if (debug) { 1508 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 1509 ifp->if_xname, 1510 sppp_proto_name(proto), 1511 sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len)); 1512 if (len) 1513 sppp_print_bytes((u_char *)(lh + 1), len); 1514 addlog(">\n"); 1515 } 1516 if (IF_QFULL(&sp->pp_cpq)) { 1517 IF_DROP(&sp->pp_fastq); 1518 IF_DROP(&ifp->if_snd); 1519 m_freem(m); 1520 if_statinc(ifp, if_oerrors); 1521 return; 1522 } 1523 1524 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 1525 IF_ENQUEUE(&sp->pp_cpq, m); 1526 1527 if (! (ifp->if_flags & IFF_OACTIVE)) { 1528 SPPP_UNLOCK(sp); 1529 if_start_lock(ifp); 1530 SPPP_LOCK(sp, RW_WRITER); 1531 } 1532 } 1533 1534 static void 1535 sppp_cp_to_lcp(void *xsp) 1536 { 1537 struct sppp *sp = xsp; 1538 1539 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_to); 1540 } 1541 1542 static void 1543 sppp_cp_to_ipcp(void *xsp) 1544 { 1545 struct sppp *sp = xsp; 1546 1547 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_IPCP].work_to); 1548 } 1549 1550 static void 1551 sppp_cp_to_ipv6cp(void *xsp) 1552 { 1553 struct sppp *sp = xsp; 1554 1555 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_IPV6CP].work_to); 1556 } 1557 1558 static void 1559 sppp_cp_to_pap(void *xsp) 1560 { 1561 struct sppp *sp = xsp; 1562 1563 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_to); 1564 } 1565 1566 static void 1567 sppp_cp_to_chap(void *xsp) 1568 { 1569 struct sppp *sp = xsp; 1570 1571 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_to); 1572 } 1573 1574 static void 1575 sppp_cp_init(const struct cp *cp, struct sppp *sp) 1576 { 1577 struct sppp_cp *scp; 1578 typedef void (*sppp_co_cb_t)(void *); 1579 static const sppp_co_cb_t to_cb[IDX_COUNT] = { 1580 [IDX_LCP] = sppp_cp_to_lcp, 1581 [IDX_IPCP] = sppp_cp_to_ipcp, 1582 [IDX_IPV6CP] = sppp_cp_to_ipv6cp, 1583 [IDX_PAP] = sppp_cp_to_pap, 1584 [IDX_CHAP] = sppp_cp_to_chap, 1585 }; 1586 1587 scp = &sp->scp[cp->protoidx]; 1588 scp->state = STATE_INITIAL; 1589 scp->fail_counter = 0; 1590 scp->seq = 0; 1591 scp->rseq = 0; 1592 1593 SPPP_WQ_SET(&scp->work_up, cp->Up, cp); 1594 SPPP_WQ_SET(&scp->work_down, cp->Down, cp); 1595 SPPP_WQ_SET(&scp->work_open, cp->Open, cp); 1596 SPPP_WQ_SET(&scp->work_close, cp->Close, cp); 1597 SPPP_WQ_SET(&scp->work_to, cp->TO, cp); 1598 SPPP_WQ_SET(&scp->work_rcr, sppp_rcr_event, cp); 1599 SPPP_WQ_SET(&scp->work_rca, sppp_rca_event, cp); 1600 SPPP_WQ_SET(&scp->work_rcn, sppp_rcn_event, cp); 1601 SPPP_WQ_SET(&scp->work_rtr, sppp_rtr_event, cp); 1602 SPPP_WQ_SET(&scp->work_rta, sppp_rta_event, cp); 1603 SPPP_WQ_SET(&scp->work_rxj, sppp_rxj_event, cp); 1604 1605 callout_init(&scp->ch, CALLOUT_MPSAFE); 1606 callout_setfunc(&scp->ch, to_cb[cp->protoidx], sp); 1607 } 1608 1609 static void 1610 sppp_cp_fini(const struct cp *cp, struct sppp *sp) 1611 { 1612 struct sppp_cp *scp; 1613 scp = &sp->scp[cp->protoidx]; 1614 1615 sppp_wq_wait(sp->wq_cp, &scp->work_up); 1616 sppp_wq_wait(sp->wq_cp, &scp->work_down); 1617 sppp_wq_wait(sp->wq_cp, &scp->work_open); 1618 sppp_wq_wait(sp->wq_cp, &scp->work_close); 1619 sppp_wq_wait(sp->wq_cp, &scp->work_to); 1620 sppp_wq_wait(sp->wq_cp, &scp->work_rcr); 1621 sppp_wq_wait(sp->wq_cp, &scp->work_rca); 1622 sppp_wq_wait(sp->wq_cp, &scp->work_rcn); 1623 sppp_wq_wait(sp->wq_cp, &scp->work_rtr); 1624 sppp_wq_wait(sp->wq_cp, &scp->work_rta); 1625 sppp_wq_wait(sp->wq_cp, &scp->work_rxj); 1626 1627 callout_halt(&scp->ch, NULL); 1628 callout_destroy(&scp->ch); 1629 } 1630 1631 /* 1632 * Handle incoming PPP control protocol packets. 1633 */ 1634 static void 1635 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1636 { 1637 STDDCL; 1638 struct lcp_header *h; 1639 int printlen, len = m->m_pkthdr.len; 1640 enum cp_rcr_type type; 1641 size_t blen, rlen; 1642 u_char *p; 1643 uint32_t u32; 1644 uint8_t *buf; 1645 1646 SPPP_LOCK(sp, RW_WRITER); 1647 1648 if (len < 4) { 1649 if (debug) 1650 log(LOG_DEBUG, 1651 "%s: %s invalid packet length: %d bytes\n", 1652 ifp->if_xname, cp->name, len); 1653 SPPP_UNLOCK(sp); 1654 return; 1655 } 1656 h = mtod(m, struct lcp_header *); 1657 if (debug) { 1658 printlen = ntohs(h->len); 1659 log(LOG_DEBUG, 1660 "%s: %s input(%s): <%s id=0x%x len=%d", 1661 ifp->if_xname, cp->name, 1662 sppp_state_name(sp->scp[cp->protoidx].state), 1663 sppp_cp_type_name(h->type), h->ident, printlen); 1664 if (len < printlen) 1665 printlen = len; 1666 if (printlen > 4) 1667 sppp_print_bytes((u_char *)(h + 1), printlen - 4); 1668 addlog(">\n"); 1669 } 1670 if (len > ntohs(h->len)) 1671 len = ntohs(h->len); 1672 p = (u_char *)(h + 1); 1673 switch (h->type) { 1674 case CONF_REQ: 1675 if (len < 4) { 1676 if (debug) 1677 addlog("%s: %s invalid conf-req length %d\n", 1678 ifp->if_xname, cp->name, 1679 len); 1680 if_statinc(ifp, if_ierrors); 1681 break; 1682 } 1683 1684 buf = NULL; 1685 blen = 0; 1686 rlen = 0; 1687 1688 type = (cp->parse_confreq)(sp, h, len, 1689 &buf, &blen, &rlen); 1690 1691 if (type == CP_RCR_ERR) { 1692 /* fatal error, shut down */ 1693 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 1694 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 1695 } else if (buf != NULL) { 1696 if (sp->scp[cp->protoidx].rcr_buf != NULL) { 1697 kmem_intr_free(sp->scp[cp->protoidx].rcr_buf, 1698 sp->scp[cp->protoidx].rcr_blen); 1699 } 1700 1701 sp->scp[cp->protoidx].rcr_buf = (void *)buf; 1702 buf = NULL; 1703 1704 sp->scp[cp->protoidx].rcr_blen = blen; 1705 sp->scp[cp->protoidx].rcr_rlen = rlen; 1706 sp->scp[cp->protoidx].rcr_type = type; 1707 sp->scp[cp->protoidx].rconfid = h->ident; 1708 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rcr); 1709 } 1710 break; 1711 case CONF_ACK: 1712 if (h->ident != sp->scp[cp->protoidx].confid) { 1713 if (debug) 1714 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1715 ifp->if_xname, cp->name, 1716 h->ident, sp->scp[cp->protoidx].confid); 1717 if_statinc(ifp, if_ierrors); 1718 break; 1719 } 1720 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rca); 1721 break; 1722 case CONF_NAK: 1723 case CONF_REJ: 1724 if (h->ident != sp->scp[cp->protoidx].confid) { 1725 if (debug) 1726 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1727 ifp->if_xname, cp->name, 1728 h->ident, sp->scp[cp->protoidx].confid); 1729 if_statinc(ifp, if_ierrors); 1730 break; 1731 } 1732 if (h->type == CONF_NAK) 1733 (cp->parse_confnak)(sp, h, len); 1734 else /* CONF_REJ */ 1735 (cp->parse_confrej)(sp, h, len); 1736 1737 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rcn); 1738 break; 1739 1740 case TERM_REQ: 1741 sp->scp[cp->protoidx].rseq = h->ident; 1742 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rtr); 1743 break; 1744 case TERM_ACK: 1745 if (h->ident != sp->scp[cp->protoidx].confid && 1746 h->ident != sp->scp[cp->protoidx].seq) { 1747 if (debug) 1748 addlog("%s: %s id mismatch " 1749 "0x%x != 0x%x and 0x%x != %0lx\n", 1750 ifp->if_xname, cp->name, 1751 h->ident, sp->scp[cp->protoidx].confid, 1752 h->ident, sp->scp[cp->protoidx].seq); 1753 if_statinc(ifp, if_ierrors); 1754 break; 1755 } 1756 1757 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rta); 1758 break; 1759 case CODE_REJ: 1760 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1761 log(LOG_INFO, 1762 "%s: %s: ignoring RXJ (%s) for code ?, " 1763 "danger will robinson\n", 1764 ifp->if_xname, cp->name, 1765 sppp_cp_type_name(h->type)); 1766 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rxj); 1767 break; 1768 case PROTO_REJ: 1769 { 1770 int catastrophic; 1771 const struct cp *upper; 1772 int i; 1773 uint16_t proto; 1774 1775 catastrophic = 0; 1776 upper = NULL; 1777 proto = p[0] << 8 | p[1]; 1778 for (i = 0; i < IDX_COUNT; i++) { 1779 if (cps[i]->proto == proto) { 1780 upper = cps[i]; 1781 break; 1782 } 1783 } 1784 if (upper == NULL) 1785 catastrophic++; 1786 1787 if (debug) 1788 log(LOG_INFO, 1789 "%s: %s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1790 ifp->if_xname, cp->name, catastrophic ? '-' : '+', 1791 sppp_cp_type_name(h->type), proto, 1792 upper ? upper->name : "unknown", 1793 upper ? sppp_state_name(sp->scp[upper->protoidx].state) : "?"); 1794 1795 /* 1796 * if we got RXJ+ against conf-req, the peer does not implement 1797 * this particular protocol type. terminate the protocol. 1798 */ 1799 if (upper && !catastrophic) { 1800 if (sp->scp[upper->protoidx].state == STATE_REQ_SENT) { 1801 sppp_wq_add(sp->wq_cp, 1802 &sp->scp[upper->protoidx].work_close); 1803 break; 1804 } 1805 } 1806 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rxj); 1807 break; 1808 } 1809 case DISC_REQ: 1810 if (cp->proto != PPP_LCP) 1811 goto illegal; 1812 /* Discard the packet. */ 1813 break; 1814 case ECHO_REQ: 1815 if (cp->proto != PPP_LCP) 1816 goto illegal; 1817 if (sp->scp[cp->protoidx].state != STATE_OPENED) { 1818 if (debug) 1819 addlog("%s: lcp echo req but lcp closed\n", 1820 ifp->if_xname); 1821 if_statinc(ifp, if_ierrors); 1822 break; 1823 } 1824 if (len < 8) { 1825 if (debug) 1826 addlog("%s: invalid lcp echo request " 1827 "packet length: %d bytes\n", 1828 ifp->if_xname, len); 1829 break; 1830 } 1831 memcpy(&u32, h + 1, sizeof u32); 1832 if (ntohl(u32) == sp->lcp.magic) { 1833 /* Line loopback mode detected. */ 1834 printf("%s: loopback\n", ifp->if_xname); 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 ++sp->scp[cp->protoidx].seq, m->m_pkthdr.len, h); 1884 if_statinc(ifp, if_ierrors); 1885 } 1886 1887 SPPP_UNLOCK(sp); 1888 } 1889 1890 /* 1891 * The generic part of all Up/Down/Open/Close/TO event handlers. 1892 * Basically, the state transition handling in the automaton. 1893 */ 1894 static void 1895 sppp_up_event(struct sppp *sp, void *xcp) 1896 { 1897 const struct cp *cp = xcp; 1898 STDDCL; 1899 1900 KASSERT(SPPP_WLOCKED(sp)); 1901 KASSERT(!cpu_softintr_p()); 1902 1903 if ((cp->flags & CP_AUTH) != 0 && 1904 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1905 return; 1906 1907 if (debug) 1908 log(LOG_DEBUG, "%s: %s up(%s)\n", 1909 ifp->if_xname, cp->name, 1910 sppp_state_name(sp->scp[cp->protoidx].state)); 1911 1912 switch (sp->scp[cp->protoidx].state) { 1913 case STATE_INITIAL: 1914 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1915 break; 1916 case STATE_STARTING: 1917 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 1918 (cp->scr)(sp); 1919 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1920 break; 1921 default: 1922 printf("%s: %s illegal up in state %s\n", 1923 ifp->if_xname, cp->name, 1924 sppp_state_name(sp->scp[cp->protoidx].state)); 1925 } 1926 } 1927 1928 static void 1929 sppp_down_event(struct sppp *sp, void *xcp) 1930 { 1931 const struct cp *cp = xcp; 1932 STDDCL; 1933 1934 KASSERT(SPPP_WLOCKED(sp)); 1935 KASSERT(!cpu_softintr_p()); 1936 1937 if ((cp->flags & CP_AUTH) != 0 && 1938 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1939 return; 1940 1941 if (debug) 1942 log(LOG_DEBUG, "%s: %s down(%s)\n", 1943 ifp->if_xname, cp->name, 1944 sppp_state_name(sp->scp[cp->protoidx].state)); 1945 1946 switch (sp->scp[cp->protoidx].state) { 1947 case STATE_CLOSED: 1948 case STATE_CLOSING: 1949 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1950 break; 1951 case STATE_STOPPED: 1952 (cp->tls)(cp, sp); 1953 /* fall through */ 1954 case STATE_STOPPING: 1955 case STATE_REQ_SENT: 1956 case STATE_ACK_RCVD: 1957 case STATE_ACK_SENT: 1958 sppp_cp_change_state(cp, sp, STATE_STARTING); 1959 break; 1960 case STATE_OPENED: 1961 (cp->tld)(sp); 1962 sppp_cp_change_state(cp, sp, STATE_STARTING); 1963 break; 1964 default: 1965 /* 1966 * a down event may be caused regardless 1967 * of state just in LCP case. 1968 */ 1969 if (cp->proto == PPP_LCP) 1970 break; 1971 1972 printf("%s: %s illegal down in state %s\n", 1973 ifp->if_xname, cp->name, 1974 sppp_state_name(sp->scp[cp->protoidx].state)); 1975 } 1976 } 1977 1978 static void 1979 sppp_open_event(struct sppp *sp, void *xcp) 1980 { 1981 const struct cp *cp = xcp; 1982 STDDCL; 1983 1984 KASSERT(SPPP_WLOCKED(sp)); 1985 KASSERT(!cpu_softintr_p()); 1986 1987 if ((cp->flags & CP_AUTH) != 0 && 1988 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1989 return; 1990 1991 if (debug) 1992 log(LOG_DEBUG, "%s: %s open(%s)\n", 1993 ifp->if_xname, cp->name, 1994 sppp_state_name(sp->scp[cp->protoidx].state)); 1995 1996 switch (sp->scp[cp->protoidx].state) { 1997 case STATE_INITIAL: 1998 sppp_cp_change_state(cp, sp, STATE_STARTING); 1999 (cp->tls)(cp, sp); 2000 break; 2001 case STATE_STARTING: 2002 break; 2003 case STATE_CLOSED: 2004 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2005 (cp->scr)(sp); 2006 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2007 break; 2008 case STATE_STOPPED: 2009 case STATE_STOPPING: 2010 case STATE_REQ_SENT: 2011 case STATE_ACK_RCVD: 2012 case STATE_ACK_SENT: 2013 case STATE_OPENED: 2014 break; 2015 case STATE_CLOSING: 2016 sppp_cp_change_state(cp, sp, STATE_STOPPING); 2017 break; 2018 } 2019 } 2020 2021 static void 2022 sppp_close_event(struct sppp *sp, void *xcp) 2023 { 2024 const struct cp *cp = xcp; 2025 STDDCL; 2026 2027 KASSERT(SPPP_WLOCKED(sp)); 2028 KASSERT(!cpu_softintr_p()); 2029 2030 if ((cp->flags & CP_AUTH) != 0 && 2031 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 2032 return; 2033 2034 if (debug) 2035 log(LOG_DEBUG, "%s: %s close(%s)\n", 2036 ifp->if_xname, cp->name, 2037 sppp_state_name(sp->scp[cp->protoidx].state)); 2038 2039 switch (sp->scp[cp->protoidx].state) { 2040 case STATE_INITIAL: 2041 case STATE_CLOSED: 2042 case STATE_CLOSING: 2043 break; 2044 case STATE_STARTING: 2045 sppp_cp_change_state(cp, sp, STATE_INITIAL); 2046 (cp->tlf)(cp, sp); 2047 break; 2048 case STATE_STOPPED: 2049 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2050 break; 2051 case STATE_STOPPING: 2052 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2053 break; 2054 case STATE_OPENED: 2055 (cp->tld)(sp); 2056 /* fall through */ 2057 case STATE_REQ_SENT: 2058 case STATE_ACK_RCVD: 2059 case STATE_ACK_SENT: 2060 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_terminate; 2061 if ((cp->flags & CP_AUTH) == 0) { 2062 sppp_cp_send(sp, cp->proto, TERM_REQ, 2063 ++sp->scp[cp->protoidx].seq, 0, 0); 2064 } 2065 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2066 break; 2067 } 2068 } 2069 2070 static void 2071 sppp_to_event(struct sppp *sp, void *xcp) 2072 { 2073 const struct cp *cp = xcp; 2074 int s; 2075 STDDCL; 2076 2077 KASSERT(SPPP_WLOCKED(sp)); 2078 KASSERT(!cpu_softintr_p()); 2079 2080 s = splnet(); 2081 2082 if (debug) 2083 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 2084 ifp->if_xname, cp->name, 2085 sppp_state_name(sp->scp[cp->protoidx].state), 2086 sp->scp[cp->protoidx].rst_counter); 2087 2088 if (--sp->scp[cp->protoidx].rst_counter < 0) 2089 /* TO- event */ 2090 switch (sp->scp[cp->protoidx].state) { 2091 case STATE_CLOSING: 2092 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2093 (cp->tlf)(cp, sp); 2094 break; 2095 case STATE_STOPPING: 2096 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2097 (cp->tlf)(cp, sp); 2098 break; 2099 case STATE_REQ_SENT: 2100 case STATE_ACK_RCVD: 2101 case STATE_ACK_SENT: 2102 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2103 (cp->tlf)(cp, sp); 2104 break; 2105 } 2106 else 2107 /* TO+ event */ 2108 switch (sp->scp[cp->protoidx].state) { 2109 case STATE_CLOSING: 2110 case STATE_STOPPING: 2111 if ((cp->flags & CP_AUTH) == 0) { 2112 sppp_cp_send(sp, cp->proto, TERM_REQ, 2113 ++sp->scp[cp->protoidx].seq, 0, 0); 2114 } 2115 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2116 break; 2117 case STATE_REQ_SENT: 2118 case STATE_ACK_RCVD: 2119 (cp->scr)(sp); 2120 /* sppp_cp_change_state() will restart the timer */ 2121 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2122 break; 2123 case STATE_ACK_SENT: 2124 (cp->scr)(sp); 2125 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2126 break; 2127 } 2128 2129 splx(s); 2130 } 2131 2132 static void 2133 sppp_rcr_event(struct sppp *sp, void *xcp) 2134 { 2135 const struct cp *cp = xcp; 2136 enum cp_rcr_type type; 2137 void *buf; 2138 size_t blen; 2139 STDDCL; 2140 2141 KASSERT(!cpu_softintr_p()); 2142 2143 type = sp->scp[cp->protoidx].rcr_type; 2144 buf = sp->scp[cp->protoidx].rcr_buf; 2145 blen = sp->scp[cp->protoidx].rcr_blen; 2146 2147 if (type == CP_RCR_ACK) { 2148 /* RCR+ event */ 2149 switch (sp->scp[cp->protoidx].state) { 2150 case STATE_OPENED: 2151 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2152 cp->tld(sp); 2153 cp->scr(sp); 2154 cp->scan(cp, sp); 2155 break; 2156 case STATE_ACK_SENT: 2157 case STATE_REQ_SENT: 2158 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2159 cp->scan(cp, sp); 2160 break; 2161 case STATE_STOPPED: 2162 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2163 cp->scr(sp); 2164 cp->scan(cp, sp); 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->scan(cp, sp); 2174 break; 2175 case STATE_CLOSING: 2176 case STATE_STOPPING: 2177 if (buf != NULL) { 2178 sp->scp[cp->protoidx].rcr_buf = NULL; 2179 sp->scp[cp->protoidx].rcr_blen = 0; 2180 kmem_free(buf, blen); 2181 } 2182 break; 2183 case STATE_CLOSED: 2184 if ((cp->flags & CP_AUTH) == 0) { 2185 sppp_cp_send(sp, cp->proto, TERM_ACK, 2186 sp->scp[cp->protoidx].rconfid, 0, 0); 2187 } 2188 break; 2189 default: 2190 printf("%s: %s illegal RCR+ in state %s\n", 2191 ifp->if_xname, cp->name, 2192 sppp_state_name(sp->scp[cp->protoidx].state)); 2193 if_statinc(ifp, if_ierrors); 2194 } 2195 } else { 2196 /* RCR- event */ 2197 switch (sp->scp[cp->protoidx].state) { 2198 case STATE_OPENED: 2199 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2200 cp->tld(sp); 2201 cp->scr(sp); 2202 cp->scan(cp, sp); 2203 break; 2204 case STATE_ACK_SENT: 2205 case STATE_REQ_SENT: 2206 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2207 cp->scan(cp, sp); 2208 break; 2209 case STATE_STOPPED: 2210 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2211 cp->scr(sp); 2212 cp->scan(cp, sp); 2213 break; 2214 case STATE_ACK_RCVD: 2215 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2216 cp->scan(cp, sp); 2217 break; 2218 case STATE_CLOSING: 2219 case STATE_STOPPING: 2220 if (buf != NULL) { 2221 sp->scp[cp->protoidx].rcr_buf = NULL; 2222 sp->scp[cp->protoidx].rcr_blen = 0; 2223 kmem_free(buf, blen); 2224 } 2225 break; 2226 case STATE_CLOSED: 2227 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2228 if ((cp->flags & CP_AUTH) == 0) { 2229 sppp_cp_send(sp, cp->proto, TERM_ACK, 2230 sp->scp[cp->protoidx].rconfid, 0, 0); 2231 } 2232 break; 2233 default: 2234 printf("%s: %s illegal RCR- in state %s\n", 2235 ifp->if_xname, cp->name, 2236 sppp_state_name(sp->scp[cp->protoidx].state)); 2237 if_statinc(ifp, if_ierrors); 2238 } 2239 } 2240 } 2241 2242 static void 2243 sppp_rca_event(struct sppp *sp, void *xcp) 2244 { 2245 const struct cp *cp = xcp; 2246 STDDCL; 2247 2248 KASSERT(!cpu_softintr_p()); 2249 2250 switch (sp->scp[cp->protoidx].state) { 2251 case STATE_CLOSED: 2252 case STATE_STOPPED: 2253 if ((cp->flags & CP_AUTH) == 0) { 2254 sppp_cp_send(sp, cp->proto, TERM_ACK, 2255 sp->scp[cp->protoidx].rconfid, 0, 0); 2256 } 2257 break; 2258 case STATE_CLOSING: 2259 case STATE_STOPPING: 2260 break; 2261 case STATE_REQ_SENT: 2262 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2263 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2264 break; 2265 case STATE_OPENED: 2266 (cp->tld)(sp); 2267 /* fall through */ 2268 case STATE_ACK_RCVD: 2269 (cp->scr)(sp); 2270 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2271 break; 2272 case STATE_ACK_SENT: 2273 sppp_cp_change_state(cp, sp, STATE_OPENED); 2274 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2275 if (debug) 2276 log(LOG_DEBUG, "%s: %s tlu\n", 2277 ifp->if_xname, cp->name); 2278 (cp->tlu)(sp); 2279 break; 2280 default: 2281 printf("%s: %s illegal RCA in state %s\n", 2282 ifp->if_xname, cp->name, 2283 sppp_state_name(sp->scp[cp->protoidx].state)); 2284 if_statinc(ifp, if_ierrors); 2285 } 2286 } 2287 2288 static void 2289 sppp_rcn_event(struct sppp *sp, void *xcp) 2290 { 2291 const struct cp *cp = xcp; 2292 struct ifnet *ifp = &sp->pp_if; 2293 2294 KASSERT(!cpu_softintr_p()); 2295 2296 switch (sp->scp[cp->protoidx].state) { 2297 case STATE_CLOSED: 2298 case STATE_STOPPED: 2299 if ((cp->flags & CP_AUTH) == 0) { 2300 sppp_cp_send(sp, cp->proto, TERM_ACK, 2301 sp->scp[cp->protoidx].rconfid, 0, 0); 2302 } 2303 break; 2304 case STATE_REQ_SENT: 2305 case STATE_ACK_SENT: 2306 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2307 (cp->scr)(sp); 2308 break; 2309 case STATE_OPENED: 2310 (cp->tld)(sp); 2311 /* fall through */ 2312 case STATE_ACK_RCVD: 2313 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2314 (cp->scr)(sp); 2315 break; 2316 case STATE_CLOSING: 2317 case STATE_STOPPING: 2318 break; 2319 default: 2320 printf("%s: %s illegal RCN in state %s\n", 2321 ifp->if_xname, cp->name, 2322 sppp_state_name(sp->scp[cp->protoidx].state)); 2323 if_statinc(ifp, if_ierrors); 2324 } 2325 } 2326 2327 static void 2328 sppp_rtr_event(struct sppp *sp, void *xcp) 2329 { 2330 const struct cp *cp = xcp; 2331 STDDCL; 2332 2333 KASSERT(!cpu_softintr_p()); 2334 2335 switch (sp->scp[cp->protoidx].state) { 2336 case STATE_ACK_RCVD: 2337 case STATE_ACK_SENT: 2338 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2339 break; 2340 case STATE_CLOSED: 2341 case STATE_STOPPED: 2342 case STATE_CLOSING: 2343 case STATE_STOPPING: 2344 case STATE_REQ_SENT: 2345 break; 2346 case STATE_OPENED: 2347 (cp->tld)(sp); 2348 sp->scp[cp->protoidx].rst_counter = 0; 2349 sppp_cp_change_state(cp, sp, STATE_STOPPING); 2350 break; 2351 default: 2352 printf("%s: %s illegal RTR in state %s\n", 2353 ifp->if_xname, cp->name, 2354 sppp_state_name(sp->scp[cp->protoidx].state)); 2355 if_statinc(ifp, if_ierrors); 2356 return; 2357 } 2358 2359 /* Send Terminate-Ack packet. */ 2360 if (debug) 2361 log(LOG_DEBUG, "%s: %s send terminate-ack\n", 2362 ifp->if_xname, cp->name); 2363 if ((cp->flags & CP_AUTH) == 0) { 2364 sppp_cp_send(sp, cp->proto, TERM_ACK, 2365 sp->scp[cp->protoidx].rseq, 0, 0); 2366 } 2367 } 2368 2369 static void 2370 sppp_rta_event(struct sppp *sp, void *xcp) 2371 { 2372 const struct cp *cp = xcp; 2373 struct ifnet *ifp = &sp->pp_if; 2374 2375 KASSERT(!cpu_softintr_p()); 2376 2377 switch (sp->scp[cp->protoidx].state) { 2378 case STATE_CLOSED: 2379 case STATE_STOPPED: 2380 case STATE_REQ_SENT: 2381 case STATE_ACK_SENT: 2382 break; 2383 case STATE_CLOSING: 2384 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2385 (cp->tlf)(cp, sp); 2386 break; 2387 case STATE_STOPPING: 2388 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2389 (cp->tlf)(cp, sp); 2390 break; 2391 case STATE_ACK_RCVD: 2392 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2393 break; 2394 case STATE_OPENED: 2395 (cp->tld)(sp); 2396 (cp->scr)(sp); 2397 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2398 break; 2399 default: 2400 printf("%s: %s illegal RTA in state %s\n", 2401 ifp->if_xname, cp->name, 2402 sppp_state_name(sp->scp[cp->protoidx].state)); 2403 if_statinc(ifp, if_ierrors); 2404 } 2405 } 2406 2407 static void 2408 sppp_rxj_event(struct sppp *sp, void *xcp) 2409 { 2410 const struct cp *cp = xcp; 2411 struct ifnet *ifp = &sp->pp_if; 2412 2413 KASSERT(!cpu_softintr_p()); 2414 2415 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 2416 switch (sp->scp[cp->protoidx].state) { 2417 case STATE_CLOSED: 2418 case STATE_STOPPED: 2419 case STATE_REQ_SENT: 2420 case STATE_ACK_SENT: 2421 case STATE_CLOSING: 2422 case STATE_STOPPING: 2423 case STATE_OPENED: 2424 break; 2425 case STATE_ACK_RCVD: 2426 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2427 break; 2428 default: 2429 printf("%s: %s illegal RXJ- in state %s\n", 2430 ifp->if_xname, cp->name, 2431 sppp_state_name(sp->scp[cp->protoidx].state)); 2432 if_statinc(ifp, if_ierrors); 2433 } 2434 } 2435 2436 /* 2437 * Change the state of a control protocol in the state automaton. 2438 * Takes care of starting/stopping the restart timer. 2439 */ 2440 void 2441 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 2442 { 2443 2444 KASSERT(SPPP_WLOCKED(sp)); 2445 2446 sp->scp[cp->protoidx].state = newstate; 2447 callout_stop(&sp->scp[cp->protoidx].ch); 2448 switch (newstate) { 2449 case STATE_INITIAL: 2450 case STATE_STARTING: 2451 case STATE_CLOSED: 2452 case STATE_STOPPED: 2453 case STATE_OPENED: 2454 break; 2455 case STATE_CLOSING: 2456 case STATE_STOPPING: 2457 case STATE_REQ_SENT: 2458 case STATE_ACK_RCVD: 2459 case STATE_ACK_SENT: 2460 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2461 break; 2462 } 2463 } 2464 2465 /* 2466 *--------------------------------------------------------------------------* 2467 * * 2468 * The LCP implementation. * 2469 * * 2470 *--------------------------------------------------------------------------* 2471 */ 2472 static void 2473 sppp_lcp_init(struct sppp *sp) 2474 { 2475 2476 KASSERT(SPPP_WLOCKED(sp)); 2477 2478 sppp_cp_init(&lcp, sp); 2479 2480 SET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC); 2481 sp->lcp.magic = 0; 2482 sp->lcp.protos = 0; 2483 sp->lcp.max_terminate = 2; 2484 sp->lcp.max_configure = 10; 2485 sp->lcp.max_failure = 10; 2486 sp->lcp.tlf_sent = false; 2487 2488 /* 2489 * Initialize counters and timeout values. Note that we don't 2490 * use the 3 seconds suggested in RFC 1661 since we are likely 2491 * running on a fast link. XXX We should probably implement 2492 * the exponential backoff option. Note that these values are 2493 * relevant for all control protocols, not just LCP only. 2494 */ 2495 sp->lcp.timeout = 1 * hz; 2496 } 2497 2498 static void 2499 sppp_lcp_up(struct sppp *sp, void *xcp) 2500 { 2501 const struct cp *cp = xcp; 2502 int pidx; 2503 STDDCL; 2504 2505 KASSERT(SPPP_WLOCKED(sp)); 2506 2507 pidx = cp->protoidx; 2508 /* Initialize activity timestamp: opening a connection is an activity */ 2509 sp->pp_last_receive = sp->pp_last_activity = time_uptime; 2510 2511 /* 2512 * If this interface is passive or dial-on-demand, and we are 2513 * still in Initial state, it means we've got an incoming 2514 * call. Activate the interface. 2515 */ 2516 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2517 if (debug) 2518 log(LOG_DEBUG, 2519 "%s: Up event", ifp->if_xname); 2520 ifp->if_flags |= IFF_RUNNING; 2521 if (sp->scp[pidx].state == STATE_INITIAL) { 2522 if (debug) 2523 addlog("(incoming call)\n"); 2524 sp->pp_flags |= PP_CALLIN; 2525 sppp_wq_add(sp->wq_cp, &sp->scp[pidx].work_open); 2526 } else if (debug) 2527 addlog("\n"); 2528 } 2529 2530 sppp_up_event(sp, xcp); 2531 } 2532 2533 static void 2534 sppp_lcp_down(struct sppp *sp, void *xcp) 2535 { 2536 const struct cp *cp = xcp; 2537 int pidx; 2538 STDDCL; 2539 2540 KASSERT(SPPP_WLOCKED(sp)); 2541 KASSERT(!cpu_softintr_p()); 2542 2543 pidx = cp->protoidx; 2544 sppp_down_event(sp, xcp); 2545 2546 /* 2547 * We need to do tls to restart when a down event is caused 2548 * by the last tlf. 2549 */ 2550 if (sp->scp[pidx].state == STATE_STARTING && 2551 sp->lcp.tlf_sent) { 2552 cp->tls(cp, sp); 2553 sp->lcp.tlf_sent = false; 2554 } 2555 2556 /* 2557 * If this is neither a dial-on-demand nor a passive 2558 * interface, simulate an ``ifconfig down'' action, so the 2559 * administrator can force a redial by another ``ifconfig 2560 * up''. XXX For leased line operation, should we immediately 2561 * try to reopen the connection here? 2562 */ 2563 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2564 if (debug) 2565 log(LOG_INFO, 2566 "%s: Down event (carrier loss), taking interface down.\n", 2567 ifp->if_xname); 2568 SPPP_UNLOCK(sp); 2569 if_down(ifp); 2570 SPPP_LOCK(sp, RW_WRITER); 2571 2572 if (sp->lcp.reestablish) 2573 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 2574 } else { 2575 if (debug) 2576 log(LOG_DEBUG, 2577 "%s: Down event (carrier loss)\n", 2578 ifp->if_xname); 2579 2580 sp->pp_flags &= ~PP_CALLIN; 2581 if (sp->scp[pidx].state != STATE_INITIAL) 2582 sppp_wq_add(sp->wq_cp, &sp->scp[pidx].work_close); 2583 ifp->if_flags &= ~IFF_RUNNING; 2584 } 2585 sp->scp[pidx].fail_counter = 0; 2586 } 2587 2588 static void 2589 sppp_lcp_open(struct sppp *sp, void *xcp) 2590 { 2591 2592 KASSERT(SPPP_WLOCKED(sp)); 2593 KASSERT(!cpu_softintr_p()); 2594 2595 sp->lcp.reestablish = false; 2596 2597 if (sp->pp_if.if_mtu < PP_MTU) { 2598 sp->lcp.mru = sp->pp_if.if_mtu; 2599 SET(sp->lcp.opts, SPPP_LCP_OPT_MRU); 2600 } else { 2601 sp->lcp.mru = PP_MTU; 2602 } 2603 sp->lcp.their_mru = PP_MTU; 2604 2605 /* 2606 * If we are authenticator, negotiate LCP_AUTH 2607 */ 2608 if (sp->hisauth.proto != 0) 2609 SET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 2610 else 2611 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 2612 sp->pp_flags &= ~PP_NEEDAUTH; 2613 sppp_open_event(sp, xcp); 2614 } 2615 2616 2617 /* 2618 * Analyze a configure request. Return true if it was agreeable, and 2619 * caused action sca, false if it has been rejected or nak'ed, and 2620 * caused action scn. (The return value is used to make the state 2621 * transition decision in the state automaton.) 2622 */ 2623 static enum cp_rcr_type 2624 sppp_lcp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 2625 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 2626 { 2627 STDDCL; 2628 u_char *buf, *r, *p, l, blen; 2629 enum cp_rcr_type type; 2630 int len, rlen; 2631 uint32_t nmagic; 2632 u_short authproto; 2633 2634 KASSERT(SPPP_WLOCKED(sp)); 2635 2636 if (origlen < sizeof(*h)) 2637 return CP_RCR_DROP; 2638 2639 origlen -= sizeof(*h); 2640 type = CP_RCR_NONE; 2641 type = 0; 2642 2643 if (origlen <= 0) 2644 return CP_RCR_DROP; 2645 else 2646 blen = origlen; 2647 2648 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 2649 if (buf == NULL) 2650 return CP_RCR_DROP; 2651 2652 if (debug) 2653 log(LOG_DEBUG, "%s: lcp parse opts:", 2654 ifp->if_xname); 2655 2656 /* pass 1: check for things that need to be rejected */ 2657 p = (void *)(h + 1); 2658 r = buf; 2659 rlen = 0; 2660 for (len = origlen; len > 1; len-= l, p += l) { 2661 l = p[1]; 2662 if (l == 0) 2663 break; 2664 2665 /* Sanity check option length */ 2666 if (l > len) { 2667 /* 2668 * Malicious option - drop immediately. 2669 * XXX Maybe we should just RXJ it? 2670 */ 2671 addlog("%s: received malicious LCP option 0x%02x, " 2672 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp->if_xname, 2673 p[0], l, len); 2674 type = CP_RCR_ERR; 2675 goto end; 2676 } 2677 if (debug) 2678 addlog(" %s", sppp_lcp_opt_name(*p)); 2679 switch (p[0]) { 2680 case LCP_OPT_MAGIC: 2681 /* Magic number. */ 2682 /* fall through, both are same length */ 2683 case LCP_OPT_ASYNC_MAP: 2684 /* Async control character map. */ 2685 if (len >= 6 || l == 6) 2686 continue; 2687 if (debug) 2688 addlog(" [invalid]"); 2689 break; 2690 case LCP_OPT_MP_EID: 2691 if (len >= l && l >= 3) { 2692 switch (p[2]) { 2693 case 0: if (l==3+ 0) continue;break; 2694 case 2: if (l==3+ 4) continue;break; 2695 case 3: if (l==3+ 6) continue;break; 2696 case 6: if (l==3+16) continue;break; 2697 case 1: /* FALLTHROUGH */ 2698 case 4: if (l<=3+20) continue;break; 2699 case 5: if (l<=3+15) continue;break; 2700 /* XXX should it be default: continue;? */ 2701 } 2702 } 2703 if (debug) 2704 addlog(" [invalid class %d len %d]", p[2], l); 2705 break; 2706 case LCP_OPT_MP_SSNHF: 2707 if (len >= 2 && l == 2) { 2708 if (debug) 2709 addlog(" [rej]"); 2710 break; 2711 } 2712 if (debug) 2713 addlog(" [invalid]"); 2714 break; 2715 case LCP_OPT_MP_MRRU: 2716 /* Multilink maximum received reconstructed unit */ 2717 /* should be fall through, both are same length */ 2718 /* FALLTHROUGH */ 2719 case LCP_OPT_MRU: 2720 /* Maximum receive unit. */ 2721 if (len >= 4 && l == 4) 2722 continue; 2723 if (debug) 2724 addlog(" [invalid]"); 2725 break; 2726 case LCP_OPT_AUTH_PROTO: 2727 if (len < 4) { 2728 if (debug) 2729 addlog(" [invalid]"); 2730 break; 2731 } 2732 authproto = (p[2] << 8) + p[3]; 2733 if (authproto == PPP_CHAP && l != 5) { 2734 if (debug) 2735 addlog(" [invalid chap len]"); 2736 break; 2737 } 2738 if (ISSET(sp->myauth.flags, SPPP_AUTHFLAG_PASSIVEAUTHPROTO)) { 2739 if (authproto == PPP_PAP || authproto == PPP_CHAP) 2740 sp->myauth.proto = authproto; 2741 } 2742 if (sp->myauth.proto == 0) { 2743 /* we are not configured to do auth */ 2744 if (debug) 2745 addlog(" [not configured]"); 2746 break; 2747 } 2748 /* 2749 * Remote want us to authenticate, remember this, 2750 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2751 * up. 2752 */ 2753 sp->pp_flags |= PP_NEEDAUTH; 2754 continue; 2755 default: 2756 /* Others not supported. */ 2757 if (debug) 2758 addlog(" [rej]"); 2759 break; 2760 } 2761 if (rlen + l > blen) { 2762 if (debug) 2763 addlog(" [overflow]"); 2764 continue; 2765 } 2766 /* Add the option to rejected list. */ 2767 memcpy(r, p, l); 2768 r += l; 2769 rlen += l; 2770 } 2771 2772 if (rlen > 0) { 2773 type = CP_RCR_REJ; 2774 goto end; 2775 } 2776 2777 if (debug) 2778 addlog("\n"); 2779 2780 /* 2781 * pass 2: check for option values that are unacceptable and 2782 * thus require to be nak'ed. 2783 */ 2784 if (debug) 2785 log(LOG_DEBUG, "%s: lcp parse opt values: ", 2786 ifp->if_xname); 2787 2788 p = (void *)(h + 1); 2789 r = buf; 2790 rlen = 0; 2791 for (len = origlen; len > 0; len -= l, p += l) { 2792 l = p[1]; 2793 if (l == 0) 2794 break; 2795 2796 if (debug) 2797 addlog(" %s", sppp_lcp_opt_name(*p)); 2798 switch (p[0]) { 2799 case LCP_OPT_MAGIC: 2800 /* Magic number -- extract. */ 2801 nmagic = (uint32_t)p[2] << 24 | 2802 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2803 if (nmagic != sp->lcp.magic) { 2804 if (debug) 2805 addlog(" 0x%x", nmagic); 2806 continue; 2807 } 2808 /* 2809 * Local and remote magics equal -- loopback? 2810 */ 2811 if (sp->pp_loopcnt >= LOOPALIVECNT*5) { 2812 printf ("%s: loopback\n", 2813 ifp->if_xname); 2814 sp->pp_loopcnt = 0; 2815 if (ifp->if_flags & IFF_UP) { 2816 SPPP_UNLOCK(sp); 2817 if_down(ifp); 2818 SPPP_LOCK(sp, RW_WRITER); 2819 2820 IF_PURGE(&sp->pp_cpq); 2821 /* XXX ? */ 2822 sppp_wq_add(sp->wq_cp, 2823 &sp->scp[IDX_LCP].work_down); 2824 sppp_wq_add(sp->wq_cp, 2825 &sp->scp[IDX_LCP].work_up); 2826 } 2827 } else if (debug) 2828 addlog(" [glitch]"); 2829 ++sp->pp_loopcnt; 2830 /* 2831 * We negate our magic here, and NAK it. If 2832 * we see it later in an NAK packet, we 2833 * suggest a new one. 2834 */ 2835 nmagic = ~sp->lcp.magic; 2836 /* Gonna NAK it. */ 2837 p[2] = nmagic >> 24; 2838 p[3] = nmagic >> 16; 2839 p[4] = nmagic >> 8; 2840 p[5] = nmagic; 2841 break; 2842 2843 case LCP_OPT_ASYNC_MAP: 2844 /* 2845 * Async control character map -- just ignore it. 2846 * 2847 * Quote from RFC 1662, chapter 6: 2848 * To enable this functionality, synchronous PPP 2849 * implementations MUST always respond to the 2850 * Async-Control-Character-Map Configuration 2851 * Option with the LCP Configure-Ack. However, 2852 * acceptance of the Configuration Option does 2853 * not imply that the synchronous implementation 2854 * will do any ACCM mapping. Instead, all such 2855 * octet mapping will be performed by the 2856 * asynchronous-to-synchronous converter. 2857 */ 2858 continue; 2859 2860 case LCP_OPT_MRU: 2861 /* 2862 * Maximum receive unit. Always agreeable, 2863 * but ignored by now. 2864 */ 2865 sp->lcp.their_mru = p[2] * 256 + p[3]; 2866 if (debug) 2867 addlog(" %ld", sp->lcp.their_mru); 2868 continue; 2869 2870 case LCP_OPT_AUTH_PROTO: 2871 authproto = (p[2] << 8) + p[3]; 2872 if (ISSET(sp->myauth.flags, SPPP_AUTHFLAG_PASSIVEAUTHPROTO)) { 2873 if (authproto == PPP_PAP || authproto == PPP_CHAP) 2874 sp->myauth.proto = authproto; 2875 } 2876 if (sp->myauth.proto != authproto) { 2877 /* not agreed, nak */ 2878 if (debug) 2879 addlog(" [mine %s != his %s]", 2880 sppp_proto_name(sp->myauth.proto), 2881 sppp_proto_name(authproto)); 2882 p[2] = sp->myauth.proto >> 8; 2883 p[3] = sp->myauth.proto; 2884 break; 2885 } 2886 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2887 if (debug) 2888 addlog(" [chap not MD5]"); 2889 p[4] = CHAP_MD5; 2890 break; 2891 } 2892 continue; 2893 case LCP_OPT_MP_EID: 2894 /* 2895 * Endpoint identification. 2896 * Always agreeable, 2897 * but ignored by now. 2898 */ 2899 if (debug) { 2900 addlog(" type %d", p[2]); 2901 sppp_print_bytes(p+3, p[1]-3); 2902 } 2903 continue; 2904 case LCP_OPT_MP_MRRU: 2905 /* 2906 * Maximum received reconstructed unit. 2907 * Always agreeable, 2908 * but ignored by now. 2909 */ 2910 sp->lcp.their_mrru = p[2] * 256 + p[3]; 2911 if (debug) 2912 addlog(" %ld", sp->lcp.their_mrru); 2913 continue; 2914 } 2915 if (rlen + l > blen) { 2916 if (debug) 2917 addlog(" [overflow]"); 2918 continue; 2919 } 2920 /* Add the option to nak'ed list. */ 2921 memcpy(r, p, l); 2922 r += l; 2923 rlen += l; 2924 } 2925 2926 if (rlen > 0) { 2927 if (++sp->scp[IDX_LCP].fail_counter >= sp->lcp.max_failure) { 2928 if (debug) 2929 addlog(" max_failure (%d) exceeded, ", 2930 sp->lcp.max_failure); 2931 type = CP_RCR_REJ; 2932 } else { 2933 type = CP_RCR_NAK; 2934 } 2935 } else { 2936 type = CP_RCR_ACK; 2937 rlen = origlen; 2938 memcpy(r, h + 1, rlen); 2939 sp->scp[IDX_LCP].fail_counter = 0; 2940 sp->pp_loopcnt = 0; 2941 } 2942 2943 end: 2944 if (debug) 2945 addlog("\n"); 2946 2947 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 2948 if (buf != NULL) 2949 kmem_intr_free(buf, blen); 2950 } else { 2951 *msgbuf = buf; 2952 *buflen = blen; 2953 *msglen = rlen; 2954 } 2955 2956 return type; 2957 } 2958 2959 /* 2960 * Analyze the LCP Configure-Reject option list, and adjust our 2961 * negotiation. 2962 */ 2963 static void 2964 sppp_lcp_confrej(struct sppp *sp, struct lcp_header *h, int len) 2965 { 2966 STDDCL; 2967 u_char *p, l; 2968 2969 KASSERT(SPPP_WLOCKED(sp)); 2970 2971 if (len <= sizeof(*h)) 2972 return; 2973 2974 len -= sizeof(*h); 2975 2976 if (debug) 2977 log(LOG_DEBUG, "%s: lcp rej opts:", 2978 ifp->if_xname); 2979 2980 p = (void *)(h + 1); 2981 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2982 /* Sanity check option length */ 2983 if (l > len) { 2984 /* 2985 * Malicious option - drop immediately. 2986 * XXX Maybe we should just RXJ it? 2987 */ 2988 addlog("%s: received malicious LCP option, " 2989 "dropping.\n", ifp->if_xname); 2990 goto end; 2991 } 2992 if (debug) 2993 addlog(" %s", sppp_lcp_opt_name(*p)); 2994 switch (p[0]) { 2995 case LCP_OPT_MAGIC: 2996 /* Magic number -- can't use it, use 0 */ 2997 CLR(sp->lcp.opts, SPPP_LCP_OPT_MAGIC); 2998 sp->lcp.magic = 0; 2999 break; 3000 case LCP_OPT_MRU: 3001 /* 3002 * We try to negotiate a lower MRU if the underlying 3003 * link's MTU is less than PP_MTU (e.g. PPPoE). If the 3004 * peer rejects this lower rate, fallback to the 3005 * default. 3006 */ 3007 if (debug) { 3008 addlog("%s: warning: peer rejected our MRU of " 3009 "%ld bytes. Defaulting to %d bytes\n", 3010 ifp->if_xname, sp->lcp.mru, PP_MTU); 3011 } 3012 CLR(sp->lcp.opts, SPPP_LCP_OPT_MRU); 3013 sp->lcp.mru = PP_MTU; 3014 break; 3015 case LCP_OPT_AUTH_PROTO: 3016 /* 3017 * Peer doesn't want to authenticate himself, 3018 * deny unless this is a dialout call, and 3019 * SPPP_AUTHFLAG_NOCALLOUT is set. 3020 */ 3021 if ((sp->pp_flags & PP_CALLIN) == 0 && 3022 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 3023 if (debug) 3024 addlog(" [don't insist on auth " 3025 "for callout]"); 3026 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 3027 break; 3028 } 3029 if (debug) 3030 addlog("[access denied]\n"); 3031 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3032 break; 3033 } 3034 } 3035 if (debug) 3036 addlog("\n"); 3037 end: 3038 return; 3039 } 3040 3041 /* 3042 * Analyze the LCP Configure-NAK option list, and adjust our 3043 * negotiation. 3044 */ 3045 static void 3046 sppp_lcp_confnak(struct sppp *sp, struct lcp_header *h, int len) 3047 { 3048 STDDCL; 3049 u_char *p, l; 3050 uint32_t magic; 3051 3052 KASSERT(SPPP_WLOCKED(sp)); 3053 3054 if (len <= sizeof(*h)) 3055 return; 3056 len -= sizeof(*h); 3057 3058 if (debug) 3059 log(LOG_DEBUG, "%s: lcp nak opts:", 3060 ifp->if_xname); 3061 3062 p = (void *)(h + 1); 3063 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3064 /* Sanity check option length */ 3065 if (l > len) { 3066 /* 3067 * Malicious option - drop immediately. 3068 * XXX Maybe we should just RXJ it? 3069 */ 3070 addlog("%s: received malicious LCP option, " 3071 "dropping.\n", ifp->if_xname); 3072 goto end; 3073 } 3074 if (debug) 3075 addlog(" %s", sppp_lcp_opt_name(*p)); 3076 switch (p[0]) { 3077 case LCP_OPT_MAGIC: 3078 /* Magic number -- renegotiate */ 3079 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC) && 3080 len >= 6 && l == 6) { 3081 magic = (uint32_t)p[2] << 24 | 3082 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 3083 /* 3084 * If the remote magic is our negated one, 3085 * this looks like a loopback problem. 3086 * Suggest a new magic to make sure. 3087 */ 3088 if (magic == ~sp->lcp.magic) { 3089 if (debug) 3090 addlog(" magic glitch"); 3091 sp->lcp.magic = cprng_fast32(); 3092 } else { 3093 sp->lcp.magic = magic; 3094 if (debug) 3095 addlog(" %d", magic); 3096 } 3097 } 3098 break; 3099 case LCP_OPT_MRU: 3100 /* 3101 * Peer wants to advise us to negotiate an MRU. 3102 * Agree on it if it's reasonable, or use 3103 * default otherwise. 3104 */ 3105 if (len >= 4 && l == 4) { 3106 u_int mru = p[2] * 256 + p[3]; 3107 if (debug) 3108 addlog(" %d", mru); 3109 if (mru < PPP_MINMRU || mru > sp->pp_if.if_mtu) 3110 mru = sp->pp_if.if_mtu; 3111 sp->lcp.mru = mru; 3112 SET(sp->lcp.opts, SPPP_LCP_OPT_MRU); 3113 } 3114 break; 3115 case LCP_OPT_AUTH_PROTO: 3116 /* 3117 * Peer doesn't like our authentication method, 3118 * deny. 3119 */ 3120 if (debug) 3121 addlog("[access denied]\n"); 3122 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3123 break; 3124 } 3125 } 3126 if (debug) 3127 addlog("\n"); 3128 end: 3129 return; 3130 } 3131 3132 static void 3133 sppp_lcp_tlu(struct sppp *sp) 3134 { 3135 STDDCL; 3136 int i; 3137 3138 KASSERT(SPPP_WLOCKED(sp)); 3139 3140 /* unlock for IFNET_LOCK and if_up() */ 3141 SPPP_UNLOCK(sp); 3142 3143 /* XXX ? */ 3144 if (! (ifp->if_flags & IFF_UP) && 3145 (ifp->if_flags & IFF_RUNNING)) { 3146 /* Coming out of loopback mode. */ 3147 if_up(ifp); 3148 } 3149 3150 IFNET_LOCK(ifp); 3151 SPPP_LOCK(sp, RW_WRITER); 3152 3153 if (ifp->if_mtu > sp->lcp.their_mru) { 3154 sp->pp_saved_mtu = ifp->if_mtu; 3155 ifp->if_mtu = sp->lcp.their_mru; 3156 if (debug) { 3157 log(LOG_DEBUG, 3158 "%s: setting MTU " 3159 "from %"PRIu64" bytes " 3160 "to %"PRIu64" bytes\n", 3161 ifp->if_xname, sp->pp_saved_mtu, 3162 ifp->if_mtu); 3163 } 3164 } 3165 IFNET_UNLOCK(ifp); 3166 3167 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO) || 3168 (sp->pp_flags & PP_NEEDAUTH) != 0) 3169 sppp_change_phase(sp, SPPP_PHASE_AUTHENTICATE); 3170 else 3171 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 3172 3173 /* 3174 * Open all authentication protocols. This is even required 3175 * if we already proceeded to network phase, since it might be 3176 * that remote wants us to authenticate, so we might have to 3177 * send a PAP request. Undesired authentication protocols 3178 * don't do anything when they get an Open event. 3179 */ 3180 for (i = 0; i < IDX_COUNT; i++) 3181 if ((cps[i])->flags & CP_AUTH) { 3182 sppp_wq_add(sp->wq_cp, 3183 &sp->scp[(cps[i])->protoidx].work_open); 3184 } 3185 3186 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 3187 /* Notify all NCPs. */ 3188 for (i = 0; i < IDX_COUNT; i++) 3189 if ((cps[i])->flags & CP_NCP) { 3190 sppp_wq_add(sp->wq_cp, 3191 &sp->scp[(cps[i])->protoidx].work_open); 3192 } 3193 } 3194 3195 /* notify low-level driver of state change */ 3196 sppp_notify_chg_wlocked(sp); 3197 } 3198 3199 static void 3200 sppp_lcp_tld(struct sppp *sp) 3201 { 3202 STDDCL; 3203 int i, pi, phase; 3204 3205 KASSERT(SPPP_WLOCKED(sp)); 3206 3207 phase = sp->pp_phase; 3208 3209 sppp_change_phase(sp, SPPP_PHASE_TERMINATE); 3210 3211 if (sp->pp_saved_mtu > 0) { 3212 SPPP_UNLOCK(sp); 3213 IFNET_LOCK(ifp); 3214 SPPP_LOCK(sp, RW_WRITER); 3215 3216 if (debug) { 3217 log(LOG_DEBUG, 3218 "%s: setting MTU " 3219 "from %"PRIu64" bytes " 3220 "to %"PRIu64" bytes\n", 3221 ifp->if_xname, ifp->if_mtu, 3222 sp->pp_saved_mtu); 3223 } 3224 3225 ifp->if_mtu = sp->pp_saved_mtu; 3226 sp->pp_saved_mtu = 0; 3227 IFNET_UNLOCK(ifp); 3228 } 3229 3230 /* 3231 * Take upper layers down. We send the Down event first and 3232 * the Close second to prevent the upper layers from sending 3233 * ``a flurry of terminate-request packets'', as the RFC 3234 * describes it. 3235 */ 3236 for (i = 0; i < IDX_COUNT; i++) { 3237 pi = (cps[i])->protoidx; 3238 if (((cps[i])->flags & CP_LCP) == 0) { 3239 /* skip if ncp was not started */ 3240 if (phase != SPPP_PHASE_NETWORK && 3241 ((cps[i])->flags & CP_NCP) != 0) 3242 continue; 3243 3244 sppp_wq_add(sp->wq_cp, &sp->scp[pi].work_down); 3245 sppp_wq_add(sp->wq_cp, &sp->scp[pi].work_close); 3246 } 3247 } 3248 } 3249 3250 static void 3251 sppp_lcp_tls(const struct cp *cp __unused, struct sppp *sp) 3252 { 3253 3254 KASSERT(SPPP_WLOCKED(sp)); 3255 3256 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 3257 printf("%s: authentication failed %d times, not retrying again\n", 3258 sp->pp_if.if_xname, sp->pp_auth_failures); 3259 3260 SPPP_UNLOCK(sp); 3261 if_down(&sp->pp_if); 3262 SPPP_LOCK(sp, RW_WRITER); 3263 return; 3264 } 3265 3266 sppp_change_phase(sp, SPPP_PHASE_ESTABLISH); 3267 3268 /* Notify lower layer if desired. */ 3269 sppp_notify_tls_wlocked(sp); 3270 sp->lcp.tlf_sent = false; 3271 } 3272 3273 static void 3274 sppp_lcp_tlf(const struct cp *cp __unused, struct sppp *sp) 3275 { 3276 3277 KASSERT(SPPP_WLOCKED(sp)); 3278 3279 sppp_change_phase(sp, SPPP_PHASE_DEAD); 3280 3281 /* Notify lower layer if desired. */ 3282 sppp_notify_tlf_wlocked(sp); 3283 3284 switch (sp->scp[IDX_LCP].state) { 3285 case STATE_CLOSED: 3286 case STATE_STOPPED: 3287 sp->lcp.tlf_sent = true; 3288 break; 3289 case STATE_INITIAL: 3290 default: 3291 /* just in case */ 3292 sp->lcp.tlf_sent = false; 3293 } 3294 } 3295 3296 static void 3297 sppp_lcp_scr(struct sppp *sp) 3298 { 3299 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 3300 int i = 0; 3301 u_short authproto; 3302 3303 KASSERT(SPPP_WLOCKED(sp)); 3304 3305 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC)) { 3306 if (! sp->lcp.magic) 3307 sp->lcp.magic = cprng_fast32(); 3308 opt[i++] = LCP_OPT_MAGIC; 3309 opt[i++] = 6; 3310 opt[i++] = sp->lcp.magic >> 24; 3311 opt[i++] = sp->lcp.magic >> 16; 3312 opt[i++] = sp->lcp.magic >> 8; 3313 opt[i++] = sp->lcp.magic; 3314 } 3315 3316 if (ISSET(sp->lcp.opts,SPPP_LCP_OPT_MRU)) { 3317 opt[i++] = LCP_OPT_MRU; 3318 opt[i++] = 4; 3319 opt[i++] = sp->lcp.mru >> 8; 3320 opt[i++] = sp->lcp.mru; 3321 } 3322 3323 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO)) { 3324 authproto = sp->hisauth.proto; 3325 opt[i++] = LCP_OPT_AUTH_PROTO; 3326 opt[i++] = authproto == PPP_CHAP? 5: 4; 3327 opt[i++] = authproto >> 8; 3328 opt[i++] = authproto; 3329 if (authproto == PPP_CHAP) 3330 opt[i++] = CHAP_MD5; 3331 } 3332 3333 sp->scp[IDX_LCP].confid = ++sp->scp[IDX_LCP].seq; 3334 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->scp[IDX_LCP].confid, i, &opt); 3335 } 3336 3337 /* 3338 * Check the open NCPs, return true if at least one NCP is open. 3339 */ 3340 3341 static int 3342 sppp_cp_check(struct sppp *sp, u_char cp_flags) 3343 { 3344 int i, mask; 3345 3346 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 3347 if ((sp->lcp.protos & mask) && (cps[i])->flags & cp_flags) 3348 return 1; 3349 return 0; 3350 } 3351 3352 /* 3353 * Re-check the open NCPs and see if we should terminate the link. 3354 * Called by the NCPs during their tlf action handling. 3355 */ 3356 static void 3357 sppp_lcp_check_and_close(struct sppp *sp) 3358 { 3359 3360 KASSERT(SPPP_WLOCKED(sp)); 3361 3362 if (sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 3363 /* don't bother, we are already going down */ 3364 return; 3365 } 3366 3367 if (sp->pp_phase == SPPP_PHASE_AUTHENTICATE && 3368 sppp_cp_check(sp, CP_AUTH)) 3369 return; 3370 3371 if (sp->pp_phase >= SPPP_PHASE_NETWORK && 3372 sppp_cp_check(sp, CP_NCP)) 3373 return; 3374 3375 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3376 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 3377 } 3378 3379 /* 3380 *--------------------------------------------------------------------------* 3381 * * 3382 * The IPCP implementation. * 3383 * * 3384 *--------------------------------------------------------------------------* 3385 */ 3386 3387 static void 3388 sppp_ipcp_init(struct sppp *sp) 3389 { 3390 3391 KASSERT(SPPP_WLOCKED(sp)); 3392 3393 sppp_cp_init(&ipcp, sp); 3394 3395 sp->ipcp.opts = 0; 3396 sp->ipcp.flags = 0; 3397 } 3398 3399 static void 3400 sppp_ipcp_open(struct sppp *sp, void *xcp) 3401 { 3402 STDDCL; 3403 uint32_t myaddr, hisaddr; 3404 3405 KASSERT(SPPP_WLOCKED(sp)); 3406 KASSERT(!cpu_softintr_p()); 3407 3408 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 3409 sp->ipcp.req_myaddr = 0; 3410 sp->ipcp.req_hisaddr = 0; 3411 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 3412 3413 #ifdef INET 3414 kpreempt_disable(); 3415 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3416 kpreempt_enable(); 3417 #else 3418 myaddr = hisaddr = 0; 3419 #endif 3420 /* 3421 * If we don't have his address, this probably means our 3422 * interface doesn't want to talk IP at all. (This could 3423 * be the case if somebody wants to speak only IPX, for 3424 * example.) Don't open IPCP in this case. 3425 */ 3426 if (hisaddr == 0) { 3427 /* XXX this message should go away */ 3428 if (debug) 3429 log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n", 3430 ifp->if_xname); 3431 return; 3432 } 3433 3434 if (myaddr == 0) { 3435 /* 3436 * I don't have an assigned address, so i need to 3437 * negotiate my address. 3438 */ 3439 sp->ipcp.flags |= IPCP_MYADDR_DYN; 3440 SET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3441 } 3442 if (hisaddr == 1) { 3443 /* 3444 * XXX - remove this hack! 3445 * remote has no valid address, we need to get one assigned. 3446 */ 3447 sp->ipcp.flags |= IPCP_HISADDR_DYN; 3448 } 3449 3450 if (sp->query_dns & 1) { 3451 SET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3452 } else { 3453 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3454 } 3455 3456 if (sp->query_dns & 2) { 3457 SET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3458 } else { 3459 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3460 } 3461 sppp_open_event(sp, xcp); 3462 } 3463 3464 static void 3465 sppp_ipcp_close(struct sppp *sp, void *xcp) 3466 { 3467 3468 KASSERT(SPPP_WLOCKED(sp)); 3469 KASSERT(!cpu_softintr_p()); 3470 3471 sppp_close_event(sp, xcp); 3472 3473 #ifdef INET 3474 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 3475 /* 3476 * Some address was dynamic, clear it again. 3477 */ 3478 sppp_clear_ip_addrs(sp); 3479 #endif 3480 } 3481 3482 /* 3483 * Analyze a configure request. Return true if it was agreeable, and 3484 * caused action sca, false if it has been rejected or nak'ed, and 3485 * caused action scn. (The return value is used to make the state 3486 * transition decision in the state automaton.) 3487 */ 3488 static enum cp_rcr_type 3489 sppp_ipcp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 3490 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 3491 { 3492 u_char *buf, *r, *p, l, blen; 3493 enum cp_rcr_type type; 3494 struct ifnet *ifp = &sp->pp_if; 3495 int rlen, len, debug = ifp->if_flags & IFF_DEBUG; 3496 uint32_t hisaddr, desiredaddr; 3497 3498 KASSERT(SPPP_WLOCKED(sp)); 3499 3500 type = CP_RCR_NONE; 3501 origlen -= sizeof(*h); 3502 3503 if (origlen < 0) 3504 return CP_RCR_DROP; 3505 3506 /* 3507 * Make sure to allocate a buf that can at least hold a 3508 * conf-nak with an `address' option. We might need it below. 3509 */ 3510 blen = MAX(6, origlen); 3511 3512 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 3513 if (buf == NULL) 3514 return CP_RCR_DROP; 3515 3516 /* pass 1: see if we can recognize them */ 3517 if (debug) 3518 log(LOG_DEBUG, "%s: ipcp parse opts:", 3519 ifp->if_xname); 3520 p = (void *)(h + 1); 3521 r = buf; 3522 rlen = 0; 3523 for (len = origlen; len > 1; len -= l, p += l) { 3524 l = p[1]; 3525 if (l == 0) 3526 break; 3527 3528 /* Sanity check option length */ 3529 if (l > len) { 3530 /* XXX should we just RXJ? */ 3531 addlog("%s: malicious IPCP option received, dropping\n", 3532 ifp->if_xname); 3533 type = CP_RCR_ERR; 3534 goto end; 3535 } 3536 if (debug) 3537 addlog(" %s", sppp_ipcp_opt_name(*p)); 3538 switch (p[0]) { 3539 #ifdef notyet 3540 case IPCP_OPT_COMPRESSION: 3541 if (len >= 6 && l >= 6) { 3542 /* correctly formed compress option */ 3543 continue; 3544 } 3545 if (debug) 3546 addlog(" [invalid]"); 3547 break; 3548 #endif 3549 case IPCP_OPT_ADDRESS: 3550 if (len >= 6 && l == 6) { 3551 /* correctly formed address option */ 3552 continue; 3553 } 3554 if (debug) 3555 addlog(" [invalid]"); 3556 break; 3557 default: 3558 /* Others not supported. */ 3559 if (debug) 3560 addlog(" [rej]"); 3561 break; 3562 } 3563 /* Add the option to rejected list. */ 3564 if (rlen + l > blen) { 3565 if (debug) 3566 addlog(" [overflow]"); 3567 continue; 3568 } 3569 memcpy(r, p, l); 3570 r += l; 3571 rlen += l; 3572 } 3573 3574 if (rlen > 0) { 3575 type = CP_RCR_REJ; 3576 goto end; 3577 } 3578 3579 if (debug) 3580 addlog("\n"); 3581 3582 /* pass 2: parse option values */ 3583 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 3584 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 3585 else 3586 #ifdef INET 3587 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 3588 #else 3589 hisaddr = 0; 3590 #endif 3591 if (debug) 3592 log(LOG_DEBUG, "%s: ipcp parse opt values: ", 3593 ifp->if_xname); 3594 p = (void *)(h + 1); 3595 r = buf; 3596 rlen = 0; 3597 for (len = origlen; len > 1; len -= l, p += l) { 3598 l = p[1]; 3599 if (l == 0) 3600 break; 3601 3602 if (debug) 3603 addlog(" %s", sppp_ipcp_opt_name(*p)); 3604 switch (p[0]) { 3605 #ifdef notyet 3606 case IPCP_OPT_COMPRESSION: 3607 continue; 3608 #endif 3609 case IPCP_OPT_ADDRESS: 3610 desiredaddr = p[2] << 24 | p[3] << 16 | 3611 p[4] << 8 | p[5]; 3612 if (desiredaddr == hisaddr || 3613 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 3614 /* 3615 * Peer's address is same as our value, 3616 * this is agreeable. Gonna conf-ack 3617 * it. 3618 */ 3619 if (debug) 3620 addlog(" %s [ack]", 3621 sppp_dotted_quad(hisaddr)); 3622 /* record that we've seen it already */ 3623 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 3624 sp->ipcp.req_hisaddr = desiredaddr; 3625 hisaddr = desiredaddr; 3626 continue; 3627 } 3628 /* 3629 * The address wasn't agreeable. This is either 3630 * he sent us 0.0.0.0, asking to assign him an 3631 * address, or he send us another address not 3632 * matching our value. Either case, we gonna 3633 * conf-nak it with our value. 3634 */ 3635 if (debug) { 3636 if (desiredaddr == 0) 3637 addlog(" [addr requested]"); 3638 else 3639 addlog(" %s [not agreed]", 3640 sppp_dotted_quad(desiredaddr)); 3641 } 3642 3643 p[2] = hisaddr >> 24; 3644 p[3] = hisaddr >> 16; 3645 p[4] = hisaddr >> 8; 3646 p[5] = hisaddr; 3647 break; 3648 } 3649 if (rlen + l > blen) { 3650 if (debug) 3651 addlog(" [overflow]"); 3652 continue; 3653 } 3654 /* Add the option to nak'ed list. */ 3655 memcpy(r, p, l); 3656 r += l; 3657 rlen += l; 3658 } 3659 3660 if (rlen > 0) { 3661 type = CP_RCR_NAK; 3662 } else { 3663 if ((sp->ipcp.flags & IPCP_HISADDR_SEEN) == 0) { 3664 /* 3665 * If we are about to conf-ack the request, but haven't seen 3666 * his address so far, gonna conf-nak it instead, with the 3667 * `address' option present and our idea of his address being 3668 * filled in there, to request negotiation of both addresses. 3669 * 3670 * XXX This can result in an endless req - nak loop if peer 3671 * doesn't want to send us his address. Q: What should we do 3672 * about it? XXX A: implement the max-failure counter. 3673 */ 3674 buf[0] = IPCP_OPT_ADDRESS; 3675 buf[1] = 6; 3676 buf[2] = hisaddr >> 24; 3677 buf[3] = hisaddr >> 16; 3678 buf[4] = hisaddr >> 8; 3679 buf[5] = hisaddr; 3680 rlen = 6; 3681 if (debug) 3682 addlog(" still need hisaddr"); 3683 type = CP_RCR_NAK; 3684 } else { 3685 type = CP_RCR_ACK; 3686 rlen = origlen; 3687 memcpy(r, h + 1, rlen); 3688 } 3689 } 3690 3691 end: 3692 if (debug) 3693 addlog("\n"); 3694 3695 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 3696 if (buf != NULL) 3697 kmem_intr_free(buf, blen); 3698 } else { 3699 *msgbuf = buf; 3700 *buflen = blen; 3701 *msglen = rlen; 3702 } 3703 3704 return type; 3705 } 3706 3707 /* 3708 * Analyze the IPCP Configure-Reject option list, and adjust our 3709 * negotiation. 3710 */ 3711 static void 3712 sppp_ipcp_confrej(struct sppp *sp, struct lcp_header *h, int len) 3713 { 3714 u_char *p, l; 3715 struct ifnet *ifp = &sp->pp_if; 3716 int debug = ifp->if_flags & IFF_DEBUG; 3717 3718 KASSERT(SPPP_WLOCKED(sp)); 3719 3720 if (len <= sizeof(*h)) 3721 return; 3722 3723 len -= sizeof(*h); 3724 3725 if (debug) 3726 log(LOG_DEBUG, "%s: ipcp rej opts:", 3727 ifp->if_xname); 3728 3729 p = (void *)(h + 1); 3730 for (; len > 1; len -= l, p += l) { 3731 l = p[1]; 3732 if (l == 0) 3733 break; 3734 3735 /* Sanity check option length */ 3736 if (l > len) { 3737 /* XXX should we just RXJ? */ 3738 addlog("%s: malicious IPCP option received, dropping\n", 3739 ifp->if_xname); 3740 goto end; 3741 } 3742 if (debug) 3743 addlog(" %s", sppp_ipcp_opt_name(*p)); 3744 switch (p[0]) { 3745 case IPCP_OPT_ADDRESS: 3746 /* 3747 * Peer doesn't grok address option. This is 3748 * bad. XXX Should we better give up here? 3749 */ 3750 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3751 break; 3752 #ifdef notyet 3753 case IPCP_OPT_COMPRESS: 3754 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_COMPRESS); 3755 break; 3756 #endif 3757 case IPCP_OPT_PRIMDNS: 3758 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3759 break; 3760 3761 case IPCP_OPT_SECDNS: 3762 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3763 break; 3764 } 3765 } 3766 if (debug) 3767 addlog("\n"); 3768 end: 3769 return; 3770 } 3771 3772 /* 3773 * Analyze the IPCP Configure-NAK option list, and adjust our 3774 * negotiation. 3775 */ 3776 static void 3777 sppp_ipcp_confnak(struct sppp *sp, struct lcp_header *h, int len) 3778 { 3779 u_char *p, l; 3780 struct ifnet *ifp = &sp->pp_if; 3781 int debug = ifp->if_flags & IFF_DEBUG; 3782 uint32_t wantaddr; 3783 3784 KASSERT(SPPP_WLOCKED(sp)); 3785 3786 len -= sizeof(*h); 3787 3788 if (debug) 3789 log(LOG_DEBUG, "%s: ipcp nak opts:", 3790 ifp->if_xname); 3791 3792 p = (void *)(h + 1); 3793 for (; len > 1; len -= l, p += l) { 3794 l = p[1]; 3795 if (l == 0) 3796 break; 3797 3798 /* Sanity check option length */ 3799 if (l > len) { 3800 /* XXX should we just RXJ? */ 3801 addlog("%s: malicious IPCP option received, dropping\n", 3802 ifp->if_xname); 3803 return; 3804 } 3805 if (debug) 3806 addlog(" %s", sppp_ipcp_opt_name(*p)); 3807 switch (*p) { 3808 case IPCP_OPT_ADDRESS: 3809 /* 3810 * Peer doesn't like our local IP address. See 3811 * if we can do something for him. We'll drop 3812 * him our address then. 3813 */ 3814 if (len >= 6 && l == 6) { 3815 wantaddr = p[2] << 24 | p[3] << 16 | 3816 p[4] << 8 | p[5]; 3817 SET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3818 if (debug) 3819 addlog(" [wantaddr %s]", 3820 sppp_dotted_quad(wantaddr)); 3821 /* 3822 * When doing dynamic address assignment, 3823 * we accept his offer. Otherwise, we 3824 * ignore it and thus continue to negotiate 3825 * our already existing value. 3826 */ 3827 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3828 if (ntohl(wantaddr) != INADDR_ANY) { 3829 if (debug) 3830 addlog(" [agree]"); 3831 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3832 sp->ipcp.req_myaddr = wantaddr; 3833 } else { 3834 if (debug) 3835 addlog(" [not agreed]"); 3836 } 3837 } 3838 } 3839 break; 3840 3841 case IPCP_OPT_PRIMDNS: 3842 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS) && 3843 len >= 6 && l == 6) { 3844 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3845 p[4] << 8 | p[5]; 3846 } 3847 break; 3848 3849 case IPCP_OPT_SECDNS: 3850 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS) && 3851 len >= 6 && l == 6) { 3852 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3853 p[4] << 8 | p[5]; 3854 } 3855 break; 3856 #ifdef notyet 3857 case IPCP_OPT_COMPRESS: 3858 /* 3859 * Peer wants different compression parameters. 3860 */ 3861 break; 3862 #endif 3863 } 3864 } 3865 if (debug) 3866 addlog("\n"); 3867 } 3868 3869 static void 3870 sppp_ipcp_tlu(struct sppp *sp) 3871 { 3872 #ifdef INET 3873 struct ifnet *ifp; 3874 3875 ifp = &sp->pp_if; 3876 KASSERT(SPPP_WLOCKED(sp)); 3877 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && 3878 ((sp->ipcp.flags & IPCP_MYADDR_SEEN) == 0)) { 3879 log(LOG_WARNING, "%s: no IP address, closing IPCP\n", 3880 ifp->if_xname); 3881 sppp_wq_add(sp->wq_cp, 3882 &sp->scp[IDX_IPCP].work_close); 3883 } else { 3884 /* we are up. Set addresses and notify anyone interested */ 3885 sppp_set_ip_addrs(sp); 3886 } 3887 #endif 3888 } 3889 3890 static void 3891 sppp_ipcp_scr(struct sppp *sp) 3892 { 3893 uint8_t opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3894 #ifdef INET 3895 uint32_t ouraddr; 3896 #endif 3897 int i = 0; 3898 3899 KASSERT(SPPP_WLOCKED(sp)); 3900 3901 #ifdef notyet 3902 if (ISSET(sp->ipcp.opts,SPPP_IPCP_OPT_COMPRESSION)) { 3903 opt[i++] = IPCP_OPT_COMPRESSION; 3904 opt[i++] = 6; 3905 opt[i++] = 0; /* VJ header compression */ 3906 opt[i++] = 0x2d; /* VJ header compression */ 3907 opt[i++] = max_slot_id; 3908 opt[i++] = comp_slot_id; 3909 } 3910 #endif 3911 3912 #ifdef INET 3913 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS)) { 3914 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) { 3915 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3916 } else { 3917 kpreempt_disable(); 3918 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3919 kpreempt_enable(); 3920 } 3921 opt[i++] = IPCP_OPT_ADDRESS; 3922 opt[i++] = 6; 3923 opt[i++] = ouraddr >> 24; 3924 opt[i++] = ouraddr >> 16; 3925 opt[i++] = ouraddr >> 8; 3926 opt[i++] = ouraddr; 3927 } 3928 #endif 3929 3930 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS)) { 3931 opt[i++] = IPCP_OPT_PRIMDNS; 3932 opt[i++] = 6; 3933 opt[i++] = sp->dns_addrs[0] >> 24; 3934 opt[i++] = sp->dns_addrs[0] >> 16; 3935 opt[i++] = sp->dns_addrs[0] >> 8; 3936 opt[i++] = sp->dns_addrs[0]; 3937 } 3938 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS)) { 3939 opt[i++] = IPCP_OPT_SECDNS; 3940 opt[i++] = 6; 3941 opt[i++] = sp->dns_addrs[1] >> 24; 3942 opt[i++] = sp->dns_addrs[1] >> 16; 3943 opt[i++] = sp->dns_addrs[1] >> 8; 3944 opt[i++] = sp->dns_addrs[1]; 3945 } 3946 3947 sp->scp[IDX_IPCP].confid = ++sp->scp[IDX_IPCP].seq; 3948 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->scp[IDX_IPCP].confid, i, &opt); 3949 } 3950 3951 /* 3952 *--------------------------------------------------------------------------* 3953 * * 3954 * The IPv6CP implementation. * 3955 * * 3956 *--------------------------------------------------------------------------* 3957 */ 3958 3959 #ifdef INET6 3960 static void 3961 sppp_ipv6cp_init(struct sppp *sp) 3962 { 3963 3964 KASSERT(SPPP_WLOCKED(sp)); 3965 3966 sppp_cp_init(&ipv6cp, sp); 3967 3968 sp->ipv6cp.opts = 0; 3969 sp->ipv6cp.flags = 0; 3970 } 3971 3972 static void 3973 sppp_ipv6cp_open(struct sppp *sp, void *xcp) 3974 { 3975 STDDCL; 3976 struct in6_addr myaddr, hisaddr; 3977 3978 KASSERT(SPPP_WLOCKED(sp)); 3979 KASSERT(!cpu_softintr_p()); 3980 3981 #ifdef IPV6CP_MYIFID_DYN 3982 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3983 #else 3984 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3985 #endif 3986 3987 kpreempt_disable(); 3988 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3989 kpreempt_enable(); 3990 /* 3991 * If we don't have our address, this probably means our 3992 * interface doesn't want to talk IPv6 at all. (This could 3993 * be the case if somebody wants to speak only IPX, for 3994 * example.) Don't open IPv6CP in this case. 3995 */ 3996 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3997 /* XXX this message should go away */ 3998 if (debug) 3999 log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n", 4000 ifp->if_xname); 4001 return; 4002 } 4003 4004 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 4005 SET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 4006 sppp_open_event(sp, xcp); 4007 } 4008 4009 /* 4010 * Analyze a configure request. Return true if it was agreeable, and 4011 * caused action sca, false if it has been rejected or nak'ed, and 4012 * caused action scn. (The return value is used to make the state 4013 * transition decision in the state automaton.) 4014 */ 4015 static enum cp_rcr_type 4016 sppp_ipv6cp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 4017 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 4018 { 4019 u_char *buf, *r, *p, l, blen; 4020 struct ifnet *ifp = &sp->pp_if; 4021 int rlen, len, debug = ifp->if_flags & IFF_DEBUG; 4022 struct in6_addr myaddr, desiredaddr, suggestaddr; 4023 enum cp_rcr_type type; 4024 int ifidcount; 4025 int collision, nohisaddr; 4026 char ip6buf[INET6_ADDRSTRLEN]; 4027 4028 KASSERT(SPPP_WLOCKED(sp)); 4029 4030 type = CP_RCR_NONE; 4031 origlen -= sizeof(*h); 4032 4033 if (origlen < 0) 4034 return CP_RCR_DROP; 4035 4036 /* 4037 * Make sure to allocate a buf that can at least hold a 4038 * conf-nak with an `address' option. We might need it below. 4039 */ 4040 blen = MAX(6, origlen); 4041 4042 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 4043 if (buf == NULL) 4044 return CP_RCR_DROP; 4045 4046 /* pass 1: see if we can recognize them */ 4047 if (debug) 4048 log(LOG_DEBUG, "%s: ipv6cp parse opts:", 4049 ifp->if_xname); 4050 p = (void *)(h + 1); 4051 r = buf; 4052 rlen = 0; 4053 ifidcount = 0; 4054 for (len = origlen; len > 1; len -= l, p += l) { 4055 l = p[1]; 4056 if (l == 0) 4057 break; 4058 4059 /* Sanity check option length */ 4060 if (l > len) { 4061 /* XXX just RXJ? */ 4062 addlog("%s: received malicious IPCPv6 option, " 4063 "dropping\n", ifp->if_xname); 4064 type = CP_RCR_ERR; 4065 goto end; 4066 } 4067 if (debug) 4068 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4069 switch (p[0]) { 4070 case IPV6CP_OPT_IFID: 4071 if (len >= 10 && l == 10 && ifidcount == 0) { 4072 /* correctly formed address option */ 4073 ifidcount++; 4074 continue; 4075 } 4076 if (debug) 4077 addlog(" [invalid]"); 4078 break; 4079 #ifdef notyet 4080 case IPV6CP_OPT_COMPRESSION: 4081 if (len >= 4 && l >= 4) { 4082 /* correctly formed compress option */ 4083 continue; 4084 } 4085 if (debug) 4086 addlog(" [invalid]"); 4087 break; 4088 #endif 4089 default: 4090 /* Others not supported. */ 4091 if (debug) 4092 addlog(" [rej]"); 4093 break; 4094 } 4095 if (rlen + l > blen) { 4096 if (debug) 4097 addlog(" [overflow]"); 4098 continue; 4099 } 4100 /* Add the option to rejected list. */ 4101 memcpy(r, p, l); 4102 r += l; 4103 rlen += l; 4104 } 4105 4106 if (rlen > 0) { 4107 type = CP_RCR_REJ; 4108 goto end; 4109 } 4110 4111 if (debug) 4112 addlog("\n"); 4113 4114 /* pass 2: parse option values */ 4115 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4116 if (debug) 4117 log(LOG_DEBUG, "%s: ipv6cp parse opt values: ", 4118 ifp->if_xname); 4119 p = (void *)(h + 1); 4120 r = buf; 4121 rlen = 0; 4122 type = CP_RCR_ACK; 4123 for (len = origlen; len > 1; len -= l, p += l) { 4124 l = p[1]; 4125 if (l == 0) 4126 break; 4127 4128 if (debug) 4129 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4130 switch (p[0]) { 4131 #ifdef notyet 4132 case IPV6CP_OPT_COMPRESSION: 4133 continue; 4134 #endif 4135 case IPV6CP_OPT_IFID: 4136 memset(&desiredaddr, 0, sizeof(desiredaddr)); 4137 memcpy(&desiredaddr.s6_addr[8], &p[2], 8); 4138 collision = (memcmp(&desiredaddr.s6_addr[8], 4139 &myaddr.s6_addr[8], 8) == 0); 4140 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 4141 4142 desiredaddr.s6_addr16[0] = htons(0xfe80); 4143 (void)in6_setscope(&desiredaddr, &sp->pp_if, NULL); 4144 4145 if (!collision && !nohisaddr) { 4146 /* no collision, hisaddr known - Conf-Ack */ 4147 type = CP_RCR_ACK; 4148 memcpy(sp->ipv6cp.my_ifid, &myaddr.s6_addr[8], 4149 sizeof(sp->ipv6cp.my_ifid)); 4150 memcpy(sp->ipv6cp.his_ifid, 4151 &desiredaddr.s6_addr[8], 4152 sizeof(sp->ipv6cp.my_ifid)); 4153 4154 if (debug) { 4155 addlog(" %s [%s]", 4156 IN6_PRINT(ip6buf, &desiredaddr), 4157 sppp_cp_type_name(CONF_ACK)); 4158 } 4159 continue; 4160 } 4161 4162 memset(&suggestaddr, 0, sizeof(suggestaddr)); 4163 if (collision && nohisaddr) { 4164 /* collision, hisaddr unknown - Conf-Rej */ 4165 type = CP_RCR_REJ; 4166 memset(&p[2], 0, 8); 4167 } else { 4168 /* 4169 * - no collision, hisaddr unknown, or 4170 * - collision, hisaddr known 4171 * Conf-Nak, suggest hisaddr 4172 */ 4173 type = CP_RCR_NAK; 4174 sppp_suggest_ip6_addr(sp, &suggestaddr); 4175 memcpy(&p[2], &suggestaddr.s6_addr[8], 8); 4176 } 4177 if (debug) { 4178 int ctype = type == CP_RCR_REJ ? CONF_REJ : CONF_NAK; 4179 addlog(" %s [%s]", IN6_PRINT(ip6buf, &desiredaddr), 4180 sppp_cp_type_name(ctype)); 4181 } 4182 break; 4183 } 4184 if (rlen + l > blen) { 4185 if (debug) 4186 addlog(" [overflow]"); 4187 continue; 4188 } 4189 /* Add the option to nak'ed list. */ 4190 memcpy(r, p, l); 4191 r += l; 4192 rlen += l; 4193 } 4194 4195 if (rlen > 0) { 4196 if (type != CP_RCR_ACK) { 4197 if (debug) { 4198 int ctype ; 4199 ctype = type == CP_RCR_REJ ? 4200 CONF_REJ : CONF_NAK; 4201 addlog(" send %s suggest %s\n", 4202 sppp_cp_type_name(ctype), 4203 IN6_PRINT(ip6buf, &suggestaddr)); 4204 } 4205 } 4206 #ifdef notdef 4207 if (type == CP_RCR_ACK) 4208 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 4209 #endif 4210 } else { 4211 if (type == CP_RCR_ACK) { 4212 rlen = origlen; 4213 memcpy(r, h + 1, rlen); 4214 } 4215 } 4216 end: 4217 if (debug) 4218 addlog("\n"); 4219 4220 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 4221 if (buf != NULL) 4222 kmem_intr_free(buf, blen); 4223 } else { 4224 *msgbuf = buf; 4225 *buflen = blen; 4226 *msglen = rlen; 4227 } 4228 4229 return type; 4230 } 4231 4232 /* 4233 * Analyze the IPv6CP Configure-Reject option list, and adjust our 4234 * negotiation. 4235 */ 4236 static void 4237 sppp_ipv6cp_confrej(struct sppp *sp, struct lcp_header *h, int len) 4238 { 4239 u_char *p, l; 4240 struct ifnet *ifp = &sp->pp_if; 4241 int debug = ifp->if_flags & IFF_DEBUG; 4242 4243 KASSERT(SPPP_WLOCKED(sp)); 4244 4245 if (len <= sizeof(*h)) 4246 return; 4247 4248 len -= sizeof(*h); 4249 4250 if (debug) 4251 log(LOG_DEBUG, "%s: ipv6cp rej opts:", 4252 ifp->if_xname); 4253 4254 p = (void *)(h + 1); 4255 for (; len > 1; len -= l, p += l) { 4256 l = p[1]; 4257 if (l == 0) 4258 break; 4259 4260 if (l > len) { 4261 /* XXX just RXJ? */ 4262 addlog("%s: received malicious IPCPv6 option, " 4263 "dropping\n", ifp->if_xname); 4264 goto end; 4265 } 4266 if (debug) 4267 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4268 switch (p[0]) { 4269 case IPV6CP_OPT_IFID: 4270 /* 4271 * Peer doesn't grok address option. This is 4272 * bad. XXX Should we better give up here? 4273 */ 4274 CLR(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 4275 break; 4276 #ifdef notyet 4277 case IPV6CP_OPT_COMPRESS: 4278 CLR(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_COMPRESS); 4279 break; 4280 #endif 4281 } 4282 } 4283 if (debug) 4284 addlog("\n"); 4285 end: 4286 return; 4287 } 4288 4289 /* 4290 * Analyze the IPv6CP Configure-NAK option list, and adjust our 4291 * negotiation. 4292 */ 4293 static void 4294 sppp_ipv6cp_confnak(struct sppp *sp, struct lcp_header *h, int len) 4295 { 4296 u_char *p, l; 4297 struct ifnet *ifp = &sp->pp_if; 4298 int debug = ifp->if_flags & IFF_DEBUG; 4299 struct in6_addr suggestaddr; 4300 char ip6buf[INET6_ADDRSTRLEN]; 4301 4302 KASSERT(SPPP_WLOCKED(sp)); 4303 4304 if (len <= sizeof(*h)) 4305 return; 4306 4307 len -= sizeof(*h); 4308 4309 if (debug) 4310 log(LOG_DEBUG, "%s: ipv6cp nak opts:", 4311 ifp->if_xname); 4312 4313 p = (void *)(h + 1); 4314 for (; len > 1; len -= l, p += l) { 4315 l = p[1]; 4316 if (l == 0) 4317 break; 4318 4319 if (l > len) { 4320 /* XXX just RXJ? */ 4321 addlog("%s: received malicious IPCPv6 option, " 4322 "dropping\n", ifp->if_xname); 4323 goto end; 4324 } 4325 if (debug) 4326 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4327 switch (p[0]) { 4328 case IPV6CP_OPT_IFID: 4329 /* 4330 * Peer doesn't like our local ifid. See 4331 * if we can do something for him. We'll drop 4332 * him our address then. 4333 */ 4334 if (len < 10 || l != 10) 4335 break; 4336 memset(&suggestaddr, 0, sizeof(suggestaddr)); 4337 suggestaddr.s6_addr16[0] = htons(0xfe80); 4338 (void)in6_setscope(&suggestaddr, &sp->pp_if, NULL); 4339 memcpy(&suggestaddr.s6_addr[8], &p[2], 8); 4340 4341 SET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 4342 if (debug) 4343 addlog(" [suggestaddr %s]", 4344 IN6_PRINT(ip6buf, &suggestaddr)); 4345 #ifdef IPV6CP_MYIFID_DYN 4346 /* 4347 * When doing dynamic address assignment, 4348 * we accept his offer. 4349 */ 4350 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 4351 struct in6_addr lastsuggest; 4352 /* 4353 * If <suggested myaddr from peer> equals to 4354 * <hisaddr we have suggested last time>, 4355 * we have a collision. generate new random 4356 * ifid. 4357 */ 4358 sppp_suggest_ip6_addr(&lastsuggest); 4359 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 4360 lastsuggest)) { 4361 if (debug) 4362 addlog(" [random]"); 4363 sppp_gen_ip6_addr(sp, &suggestaddr); 4364 } 4365 sppp_set_ip6_addr(sp, &suggestaddr, 0); 4366 if (debug) 4367 addlog(" [agree]"); 4368 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 4369 } 4370 #else 4371 /* 4372 * Since we do not do dynamic address assignment, 4373 * we ignore it and thus continue to negotiate 4374 * our already existing value. This can possibly 4375 * go into infinite request-reject loop. 4376 * 4377 * This is not likely because we normally use 4378 * ifid based on MAC-address. 4379 * If you have no ethernet card on the node, too bad. 4380 * XXX should we use fail_counter? 4381 */ 4382 #endif 4383 break; 4384 #ifdef notyet 4385 case IPV6CP_OPT_COMPRESS: 4386 /* 4387 * Peer wants different compression parameters. 4388 */ 4389 break; 4390 #endif 4391 } 4392 } 4393 if (debug) 4394 addlog("\n"); 4395 end: 4396 return; 4397 } 4398 4399 static void 4400 sppp_ipv6cp_tlu(struct sppp *sp) 4401 { 4402 4403 KASSERT(SPPP_WLOCKED(sp)); 4404 /* we are up - notify isdn daemon */ 4405 sppp_notify_con_wlocked(sp); 4406 } 4407 4408 static void 4409 sppp_ipv6cp_scr(struct sppp *sp) 4410 { 4411 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 4412 struct in6_addr ouraddr; 4413 int i = 0; 4414 4415 KASSERT(SPPP_WLOCKED(sp)); 4416 4417 if (ISSET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID)) { 4418 kpreempt_disable(); 4419 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 4420 kpreempt_enable(); 4421 4422 opt[i++] = IPV6CP_OPT_IFID; 4423 opt[i++] = 10; 4424 memcpy(&opt[i], &ouraddr.s6_addr[8], 8); 4425 i += 8; 4426 } 4427 4428 #ifdef notyet 4429 if (ISSET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_COMPRESSION)) { 4430 opt[i++] = IPV6CP_OPT_COMPRESSION; 4431 opt[i++] = 4; 4432 opt[i++] = 0; /* TBD */ 4433 opt[i++] = 0; /* TBD */ 4434 /* variable length data may follow */ 4435 } 4436 #endif 4437 4438 sp->scp[IDX_IPV6CP].confid = ++sp->scp[IDX_IPV6CP].seq; 4439 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->scp[IDX_IPV6CP].confid, i, &opt); 4440 } 4441 #else /*INET6*/ 4442 static void 4443 sppp_ipv6cp_init(struct sppp *sp) 4444 { 4445 4446 KASSERT(SPPP_WLOCKED(sp)); 4447 } 4448 4449 static void 4450 sppp_ipv6cp_open(struct sppp *sp, void *xcp) 4451 { 4452 4453 KASSERT(SPPP_WLOCKED(sp)); 4454 } 4455 4456 static enum cp_rcr_type 4457 sppp_ipv6cp_confreq(struct sppp *sp, struct lcp_header *h, 4458 int len, uint8_t **msgbuf, size_t *buflen, size_t *msglen) 4459 { 4460 4461 KASSERT(SPPP_WLOCKED(sp)); 4462 return 0; 4463 } 4464 4465 static void 4466 sppp_ipv6cp_confrej(struct sppp *sp, struct lcp_header *h, 4467 int len) 4468 { 4469 4470 KASSERT(SPPP_WLOCKED(sp)); 4471 } 4472 4473 static void 4474 sppp_ipv6cp_confnak(struct sppp *sp, struct lcp_header *h, 4475 int len) 4476 { 4477 4478 KASSERT(SPPP_WLOCKED(sp)); 4479 } 4480 4481 static void 4482 sppp_ipv6cp_tlu(struct sppp *sp) 4483 { 4484 4485 KASSERT(SPPP_WLOCKED(sp)); 4486 } 4487 4488 static void 4489 sppp_ipv6cp_scr(struct sppp *sp) 4490 { 4491 4492 KASSERT(SPPP_WLOCKED(sp)); 4493 } 4494 #endif /*INET6*/ 4495 4496 /* 4497 *--------------------------------------------------------------------------* 4498 * * 4499 * The CHAP implementation. * 4500 * * 4501 *--------------------------------------------------------------------------* 4502 */ 4503 /* 4504 * The authentication protocols is implemented on the state machine for 4505 * control protocols. And it uses following actions and events. 4506 * 4507 * Actions: 4508 * - scr: send CHAP_CHALLENGE and CHAP_RESPONSE 4509 * - sca: send CHAP_SUCCESS 4510 * - scn: send CHAP_FAILURE and shutdown lcp 4511 * Events: 4512 * - RCR+: receive CHAP_RESPONSE containing correct digest 4513 * - RCR-: receive CHAP_RESPONSE containing wrong digest 4514 * - RCA: receive CHAP_SUCCESS 4515 * - RCN: (this event is unused) 4516 * - TO+: re-send CHAP_CHALLENGE and CHAP_RESPONSE 4517 * - TO-: this layer finish 4518 */ 4519 4520 /* 4521 * Handle incoming CHAP packets. 4522 */ 4523 void 4524 sppp_chap_input(struct sppp *sp, struct mbuf *m) 4525 { 4526 STDDCL; 4527 struct lcp_header *h; 4528 int len, x; 4529 u_char *value, *name, digest[sizeof(sp->chap.challenge)]; 4530 int value_len, name_len; 4531 MD5_CTX ctx; 4532 4533 len = m->m_pkthdr.len; 4534 if (len < 4) { 4535 if (debug) 4536 log(LOG_DEBUG, 4537 "%s: chap invalid packet length: %d bytes\n", 4538 ifp->if_xname, len); 4539 return; 4540 } 4541 h = mtod(m, struct lcp_header *); 4542 if (len > ntohs(h->len)) 4543 len = ntohs(h->len); 4544 4545 SPPP_LOCK(sp, RW_WRITER); 4546 4547 switch (h->type) { 4548 /* challenge, failure and success are his authproto */ 4549 case CHAP_CHALLENGE: 4550 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4551 /* can't do anything useful */ 4552 sp->pp_auth_failures++; 4553 printf("%s: chap input without my name and my secret being set\n", 4554 ifp->if_xname); 4555 break; 4556 } 4557 value = 1 + (u_char *)(h + 1); 4558 value_len = value[-1]; 4559 name = value + value_len; 4560 name_len = len - value_len - 5; 4561 if (name_len < 0) { 4562 if (debug) { 4563 log(LOG_DEBUG, 4564 "%s: chap corrupted challenge " 4565 "<%s id=0x%x len=%d", 4566 ifp->if_xname, 4567 sppp_auth_type_name(PPP_CHAP, h->type), 4568 h->ident, ntohs(h->len)); 4569 if (len > 4) 4570 sppp_print_bytes((u_char *)(h + 1), 4571 len - 4); 4572 addlog(">\n"); 4573 } 4574 break; 4575 } 4576 4577 if (debug) { 4578 log(LOG_DEBUG, 4579 "%s: chap input <%s id=0x%x len=%d name=", 4580 ifp->if_xname, 4581 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 4582 ntohs(h->len)); 4583 sppp_print_string((char *) name, name_len); 4584 addlog(" value-size=%d value=", value_len); 4585 sppp_print_bytes(value, value_len); 4586 addlog(">\n"); 4587 } 4588 4589 /* Compute reply value. */ 4590 MD5Init(&ctx); 4591 MD5Update(&ctx, &h->ident, 1); 4592 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 4593 MD5Update(&ctx, value, value_len); 4594 MD5Final(sp->chap.digest, &ctx); 4595 sp->chap.digest_len = sizeof(sp->chap.digest); 4596 sp->scp[IDX_CHAP].rconfid = h->ident; 4597 4598 sppp_wq_add(sp->wq_cp, &sp->chap.work_challenge_rcvd); 4599 break; 4600 4601 case CHAP_SUCCESS: 4602 if (debug) { 4603 log(LOG_DEBUG, "%s: chap success", 4604 ifp->if_xname); 4605 if (len > 4) { 4606 addlog(": "); 4607 sppp_print_string((char *)(h + 1), len - 4); 4608 } 4609 addlog("\n"); 4610 } 4611 4612 if (h->ident != sp->scp[IDX_CHAP].rconfid) { 4613 if (debug) { 4614 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4615 ifp->if_xname, chap.name, 4616 h->ident, sp->scp[IDX_CHAP].rconfid); 4617 } 4618 if_statinc(ifp, if_ierrors); 4619 break; 4620 } 4621 4622 if (sp->chap.digest_len == 0) { 4623 if (debug) { 4624 log(LOG_DEBUG, 4625 "%s: receive CHAP success without challenge\n", 4626 ifp->if_xname); 4627 } 4628 if_statinc(ifp, if_ierrors); 4629 break; 4630 } 4631 4632 x = splnet(); 4633 sp->pp_auth_failures = 0; 4634 sp->pp_flags &= ~PP_NEEDAUTH; 4635 splx(x); 4636 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4637 sp->chap.digest_len = 0; 4638 4639 if (!ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_SERV)) { 4640 /* 4641 * we are not authenticator for CHAP, 4642 * generate a dummy RCR+ event without CHAP_RESPONSE 4643 */ 4644 sp->scp[IDX_CHAP].rcr_type = CP_RCR_ACK; 4645 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4646 } 4647 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rca); 4648 break; 4649 4650 case CHAP_FAILURE: 4651 if (h->ident != sp->scp[IDX_CHAP].rconfid) { 4652 if (debug) { 4653 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4654 ifp->if_xname, chap.name, 4655 h->ident, sp->scp[IDX_CHAP].rconfid); 4656 } 4657 if_statinc(ifp, if_ierrors); 4658 break; 4659 } 4660 4661 if (sp->chap.digest_len == 0) { 4662 if (debug) { 4663 log(LOG_DEBUG, 4664 "%s: receive CHAP failure without challenge\n", 4665 ifp->if_xname); 4666 } 4667 if_statinc(ifp, if_ierrors); 4668 break; 4669 } 4670 4671 x = splnet(); 4672 sp->pp_auth_failures++; 4673 splx(x); 4674 if (debug) { 4675 log(LOG_INFO, "%s: chap failure", 4676 ifp->if_xname); 4677 if (len > 4) { 4678 addlog(": "); 4679 sppp_print_string((char *)(h + 1), len - 4); 4680 } 4681 addlog("\n"); 4682 } else 4683 log(LOG_INFO, "%s: chap failure\n", 4684 ifp->if_xname); 4685 4686 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4687 sp->chap.digest_len = 0; 4688 /* 4689 * await LCP shutdown by authenticator, 4690 * so we don't have to enqueue sc->scp[IDX_CHAP].work_rcn 4691 */ 4692 break; 4693 4694 /* response is my authproto */ 4695 case CHAP_RESPONSE: 4696 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4697 /* can't do anything useful */ 4698 printf("%s: chap response" 4699 " without his name and his secret being set\n", 4700 ifp->if_xname); 4701 break; 4702 } 4703 value = 1 + (u_char *)(h + 1); 4704 value_len = value[-1]; 4705 name = value + value_len; 4706 name_len = len - value_len - 5; 4707 if (name_len < 0) { 4708 if (debug) { 4709 log(LOG_DEBUG, 4710 "%s: chap corrupted response " 4711 "<%s id=0x%x len=%d", 4712 ifp->if_xname, 4713 sppp_auth_type_name(PPP_CHAP, h->type), 4714 h->ident, ntohs(h->len)); 4715 if (len > 4) 4716 sppp_print_bytes((u_char *)(h + 1), 4717 len - 4); 4718 addlog(">\n"); 4719 } 4720 break; 4721 } 4722 if (h->ident != sp->scp[IDX_CHAP].confid) { 4723 if (debug) 4724 log(LOG_DEBUG, 4725 "%s: chap dropping response for old ID " 4726 "(got %d, expected %d)\n", 4727 ifp->if_xname, 4728 h->ident, sp->scp[IDX_CHAP].confid); 4729 break; 4730 } else { 4731 sp->scp[IDX_CHAP].rconfid = h->ident; 4732 } 4733 4734 if (sp->hisauth.name != NULL && 4735 (name_len != sp->hisauth.name_len 4736 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 4737 log(LOG_INFO, "%s: chap response, his name ", 4738 ifp->if_xname); 4739 sppp_print_string(name, name_len); 4740 addlog(" != expected "); 4741 sppp_print_string(sp->hisauth.name, 4742 sp->hisauth.name_len); 4743 addlog("\n"); 4744 4745 /* generate RCR- event */ 4746 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4747 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4748 break; 4749 } 4750 4751 if (debug) { 4752 log(LOG_DEBUG, "%s: chap input(%s) " 4753 "<%s id=0x%x len=%d name=", 4754 ifp->if_xname, 4755 sppp_state_name(sp->scp[IDX_CHAP].state), 4756 sppp_auth_type_name(PPP_CHAP, h->type), 4757 h->ident, ntohs(h->len)); 4758 sppp_print_string((char *)name, name_len); 4759 addlog(" value-size=%d value=", value_len); 4760 sppp_print_bytes(value, value_len); 4761 addlog(">\n"); 4762 } 4763 4764 if (value_len == sizeof(sp->chap.challenge) && 4765 value_len == sizeof(sp->chap.digest)) { 4766 MD5Init(&ctx); 4767 MD5Update(&ctx, &h->ident, 1); 4768 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 4769 MD5Update(&ctx, sp->chap.challenge, sizeof(sp->chap.challenge)); 4770 MD5Final(digest, &ctx); 4771 4772 if (memcmp(digest, value, value_len) == 0) { 4773 sp->scp[IDX_CHAP].rcr_type = CP_RCR_ACK; 4774 if (!ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_PEER) || 4775 sp->chap.rechallenging) { 4776 /* generate a dummy RCA event*/ 4777 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rca); 4778 } 4779 } else { 4780 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4781 } 4782 } else { 4783 if (debug) 4784 log(LOG_DEBUG, 4785 "%s: chap bad hash value length: " 4786 "%d bytes, should be %zu\n", 4787 ifp->if_xname, value_len, 4788 sizeof(sp->chap.challenge)); 4789 4790 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4791 } 4792 4793 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4794 break; 4795 4796 default: 4797 /* Unknown CHAP packet type -- ignore. */ 4798 if (debug) { 4799 log(LOG_DEBUG, "%s: chap unknown input(%s) " 4800 "<0x%x id=0x%xh len=%d", 4801 ifp->if_xname, 4802 sppp_state_name(sp->scp[IDX_CHAP].state), 4803 h->type, h->ident, ntohs(h->len)); 4804 if (len > 4) 4805 sppp_print_bytes((u_char *)(h + 1), len - 4); 4806 addlog(">\n"); 4807 } 4808 break; 4809 4810 } 4811 4812 SPPP_UNLOCK(sp); 4813 } 4814 4815 static void 4816 sppp_chap_init(struct sppp *sp) 4817 { 4818 4819 KASSERT(SPPP_WLOCKED(sp)); 4820 4821 sppp_cp_init(&chap, sp); 4822 4823 SPPP_WQ_SET(&sp->chap.work_challenge_rcvd, 4824 sppp_chap_rcv_challenge_event, &chap); 4825 } 4826 4827 static void 4828 sppp_chap_open(struct sppp *sp, void *xcp) 4829 { 4830 4831 KASSERT(SPPP_WLOCKED(sp)); 4832 4833 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4834 sp->chap.digest_len = 0; 4835 sp->chap.rechallenging = false; 4836 sp->chap.response_rcvd = false; 4837 sppp_open_event(sp, xcp); 4838 } 4839 4840 static void 4841 sppp_chap_tlu(struct sppp *sp) 4842 { 4843 STDDCL; 4844 int i, x; 4845 4846 KASSERT(SPPP_WLOCKED(sp)); 4847 4848 i = 0; 4849 sp->scp[IDX_CHAP].rst_counter = sp->lcp.max_configure; 4850 x = splnet(); 4851 sp->pp_auth_failures = 0; 4852 splx(x); 4853 4854 log(LOG_DEBUG, "%s: chap %s", ifp->if_xname, 4855 sp->pp_phase == SPPP_PHASE_NETWORK ? "reconfirmed" : "tlu"); 4856 4857 /* 4858 * Some broken CHAP implementations (Conware CoNet, firmware 4859 * 4.0.?) don't want to re-authenticate their CHAP once the 4860 * initial challenge-response exchange has taken place. 4861 * Provide for an option to avoid rechallenges. 4862 */ 4863 if (ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_SERV) && 4864 (sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4865 /* 4866 * Compute the re-challenge timeout. This will yield 4867 * a number between 300 and 810 seconds. 4868 */ 4869 i = 300 + ((unsigned)(cprng_fast32() & 0xff00) >> 7); 4870 callout_schedule(&sp->scp[IDX_CHAP].ch, i * hz); 4871 4872 if (debug) { 4873 addlog(", next rechallenge in %d seconds", i); 4874 } 4875 } 4876 4877 addlog("\n"); 4878 4879 /* 4880 * If we are already in phase network, we are done here. This 4881 * is the case if this is a dummy tlu event after a re-challenge. 4882 */ 4883 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4884 sppp_phase_network(sp); 4885 } 4886 4887 static void 4888 sppp_chap_scr(struct sppp *sp) 4889 { 4890 uint32_t *ch; 4891 u_char clen, dsize; 4892 int role; 4893 4894 KASSERT(SPPP_WLOCKED(sp)); 4895 4896 role = sppp_auth_role(&chap, sp); 4897 4898 if (ISSET(role, SPPP_AUTH_SERV) && 4899 !sp->chap.response_rcvd) { 4900 /* we are authenticator for CHAP, send challenge */ 4901 ch = (uint32_t *)sp->chap.challenge; 4902 clen = sizeof(sp->chap.challenge); 4903 /* Compute random challenge. */ 4904 cprng_strong(kern_cprng, ch, clen, 0); 4905 4906 sp->scp[IDX_CHAP].confid = ++sp->scp[IDX_CHAP].seq; 4907 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->scp[IDX_CHAP].confid, 4908 sizeof(clen), (const char *)&clen, 4909 sizeof(sp->chap.challenge), sp->chap.challenge, 4910 0); 4911 } 4912 4913 if (ISSET(role, SPPP_AUTH_PEER) && 4914 sp->chap.digest_len > 0) { 4915 /* we are peer for CHAP, send response */ 4916 dsize = sp->chap.digest_len; 4917 4918 sppp_auth_send(&chap, sp, CHAP_RESPONSE, sp->scp[IDX_CHAP].rconfid, 4919 sizeof(dsize), (const char *)&dsize, 4920 sp->chap.digest_len, sp->chap.digest, 4921 sp->myauth.name_len, sp->myauth.name, 0); 4922 } 4923 } 4924 4925 static void 4926 sppp_chap_rcv_challenge_event(struct sppp *sp, void *xcp) 4927 { 4928 const struct cp *cp = xcp; 4929 4930 KASSERT(!cpu_softintr_p()); 4931 4932 sp->chap.rechallenging = false; 4933 4934 switch (sp->scp[IDX_CHAP].state) { 4935 case STATE_REQ_SENT: 4936 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 4937 cp->scr(sp); 4938 break; 4939 case STATE_OPENED: 4940 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 4941 cp->scr(sp); 4942 break; 4943 } 4944 } 4945 4946 /* 4947 *--------------------------------------------------------------------------* 4948 * * 4949 * The PAP implementation. * 4950 * * 4951 *--------------------------------------------------------------------------* 4952 */ 4953 /* 4954 * PAP uses following actions and events. 4955 * Actions: 4956 * - scr: send PAP_REQ 4957 * - sca: send PAP_ACK 4958 * - scn: send PAP_NAK 4959 * Events: 4960 * - RCR+: receive PAP_REQ containing correct username and password 4961 * - RCR-: receive PAP_REQ containing wrong username and password 4962 * - RCA: receive PAP_ACK 4963 * - RCN: (this event is unused) 4964 * - TO+: re-send PAP_REQ 4965 * - TO-: this layer finish 4966 */ 4967 4968 /* 4969 * Handle incoming PAP packets. */ 4970 static void 4971 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4972 { 4973 STDDCL; 4974 struct lcp_header *h; 4975 int len, x; 4976 char *name, *secret; 4977 int name_len, secret_len; 4978 4979 /* 4980 * Malicious input might leave this uninitialized, so 4981 * init to an impossible value. 4982 */ 4983 secret_len = -1; 4984 4985 len = m->m_pkthdr.len; 4986 if (len < 5) { 4987 if (debug) 4988 log(LOG_DEBUG, 4989 "%s: pap invalid packet length: %d bytes\n", 4990 ifp->if_xname, len); 4991 return; 4992 } 4993 h = mtod(m, struct lcp_header *); 4994 if (len > ntohs(h->len)) 4995 len = ntohs(h->len); 4996 4997 SPPP_LOCK(sp, RW_WRITER); 4998 4999 switch (h->type) { 5000 /* PAP request is my authproto */ 5001 case PAP_REQ: 5002 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 5003 /* can't do anything useful */ 5004 printf("%s: pap request" 5005 " without his name and his secret being set\n", 5006 ifp->if_xname); 5007 break; 5008 } 5009 name = 1 + (u_char *)(h + 1); 5010 name_len = name[-1]; 5011 secret = name + name_len + 1; 5012 if (name_len > len - 6 || 5013 (secret_len = secret[-1]) > len - 6 - name_len) { 5014 if (debug) { 5015 log(LOG_DEBUG, "%s: pap corrupted input " 5016 "<%s id=0x%x len=%d", 5017 ifp->if_xname, 5018 sppp_auth_type_name(PPP_PAP, h->type), 5019 h->ident, ntohs(h->len)); 5020 if (len > 4) 5021 sppp_print_bytes((u_char *)(h + 1), 5022 len - 4); 5023 addlog(">\n"); 5024 } 5025 break; 5026 } 5027 if (debug) { 5028 log(LOG_DEBUG, "%s: pap input(%s) " 5029 "<%s id=0x%x len=%d name=", 5030 ifp->if_xname, 5031 sppp_state_name(sp->scp[IDX_PAP].state), 5032 sppp_auth_type_name(PPP_PAP, h->type), 5033 h->ident, ntohs(h->len)); 5034 sppp_print_string((char *)name, name_len); 5035 addlog(" secret="); 5036 sppp_print_string((char *)secret, secret_len); 5037 addlog(">\n"); 5038 } 5039 5040 sp->scp[IDX_PAP].rconfid = h->ident; 5041 5042 if (name_len == sp->hisauth.name_len && 5043 memcmp(name, sp->hisauth.name, name_len) == 0 && 5044 secret_len == sp->hisauth.secret_len && 5045 memcmp(secret, sp->hisauth.secret, secret_len) == 0) { 5046 sp->scp[IDX_PAP].rcr_type = CP_RCR_ACK; 5047 if (!ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_PEER)) { 5048 /* generate a dummy RCA event*/ 5049 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rca); 5050 } 5051 } else { 5052 sp->scp[IDX_PAP].rcr_type = CP_RCR_NAK; 5053 } 5054 5055 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rcr); 5056 break; 5057 5058 /* ack and nak are his authproto */ 5059 case PAP_ACK: 5060 if (debug) { 5061 log(LOG_DEBUG, "%s: pap success", 5062 ifp->if_xname); 5063 name = 1 + (u_char *)(h + 1); 5064 name_len = name[-1]; 5065 if (len > 5 && name_len < len+4) { 5066 addlog(": "); 5067 sppp_print_string(name, name_len); 5068 } 5069 addlog("\n"); 5070 } 5071 5072 if (h->ident != sp->scp[IDX_PAP].confid) { 5073 if (debug) { 5074 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 5075 ifp->if_xname, pap.name, 5076 h->ident, sp->scp[IDX_PAP].rconfid); 5077 } 5078 if_statinc(ifp, if_ierrors); 5079 break; 5080 } 5081 5082 x = splnet(); 5083 sp->pp_auth_failures = 0; 5084 sp->pp_flags &= ~PP_NEEDAUTH; 5085 splx(x); 5086 5087 /* we are not authenticator, generate a dummy RCR+ event */ 5088 if (!ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_SERV)) { 5089 sp->scp[IDX_PAP].rcr_type = CP_RCR_ACK; 5090 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rcr); 5091 } 5092 5093 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rca); 5094 break; 5095 5096 case PAP_NAK: 5097 if (debug) { 5098 log(LOG_INFO, "%s: pap failure", 5099 ifp->if_xname); 5100 name = 1 + (u_char *)(h + 1); 5101 name_len = name[-1]; 5102 if (len > 5 && name_len < len+4) { 5103 addlog(": "); 5104 sppp_print_string(name, name_len); 5105 } 5106 addlog("\n"); 5107 } else 5108 log(LOG_INFO, "%s: pap failure\n", 5109 ifp->if_xname); 5110 5111 if (h->ident != sp->scp[IDX_PAP].confid) { 5112 if (debug) { 5113 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 5114 ifp->if_xname, pap.name, 5115 h->ident, sp->scp[IDX_PAP].rconfid); 5116 } 5117 if_statinc(ifp, if_ierrors); 5118 break; 5119 } 5120 5121 sp->pp_auth_failures++; 5122 /* 5123 * await LCP shutdown by authenticator, 5124 * so we don't have to enqueue sc->scp[IDX_PAP].work_rcn 5125 */ 5126 break; 5127 5128 default: 5129 /* Unknown PAP packet type -- ignore. */ 5130 if (debug) { 5131 log(LOG_DEBUG, "%s: pap corrupted input " 5132 "<0x%x id=0x%x len=%d", 5133 ifp->if_xname, 5134 h->type, h->ident, ntohs(h->len)); 5135 if (len > 4) 5136 sppp_print_bytes((u_char *)(h + 1), len - 4); 5137 addlog(">\n"); 5138 } 5139 break; 5140 } 5141 5142 SPPP_UNLOCK(sp); 5143 } 5144 5145 static void 5146 sppp_pap_init(struct sppp *sp) 5147 { 5148 5149 KASSERT(SPPP_WLOCKED(sp)); 5150 sppp_cp_init(&pap, sp); 5151 } 5152 5153 static void 5154 sppp_pap_tlu(struct sppp *sp) 5155 { 5156 STDDCL; 5157 int x; 5158 5159 sp->scp[IDX_PAP].rst_counter = sp->lcp.max_configure; 5160 5161 if (debug) 5162 log(LOG_DEBUG, "%s: %s tlu\n", 5163 ifp->if_xname, pap.name); 5164 5165 x = splnet(); 5166 sp->pp_auth_failures = 0; 5167 splx(x); 5168 5169 if (sp->pp_phase < SPPP_PHASE_NETWORK) 5170 sppp_phase_network(sp); 5171 } 5172 5173 static void 5174 sppp_pap_scr(struct sppp *sp) 5175 { 5176 u_char idlen, pwdlen; 5177 5178 KASSERT(SPPP_WLOCKED(sp)); 5179 5180 if (ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_PEER) && 5181 sp->scp[IDX_PAP].state != STATE_ACK_RCVD) { 5182 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 5183 log(LOG_DEBUG, "%s: couldn't send PAP_REQ " 5184 "because of no name or no secret\n", 5185 sp->pp_if.if_xname); 5186 } else { 5187 sp->scp[IDX_PAP].confid = ++sp->scp[IDX_PAP].seq; 5188 pwdlen = sp->myauth.secret_len; 5189 idlen = sp->myauth.name_len; 5190 5191 sppp_auth_send(&pap, sp, PAP_REQ, sp->scp[IDX_PAP].confid, 5192 sizeof idlen, (const char *)&idlen, 5193 idlen, sp->myauth.name, 5194 sizeof pwdlen, (const char *)&pwdlen, 5195 pwdlen, sp->myauth.secret, 5196 0); 5197 } 5198 } 5199 } 5200 5201 /* 5202 * Random miscellaneous functions. 5203 */ 5204 5205 /* 5206 * Send a PAP or CHAP proto packet. 5207 * 5208 * Varadic function, each of the elements for the ellipsis is of type 5209 * ``size_t mlen, const u_char *msg''. Processing will stop iff 5210 * mlen == 0. 5211 * NOTE: never declare variadic functions with types subject to type 5212 * promotion (i.e. u_char). This is asking for big trouble depending 5213 * on the architecture you are on... 5214 */ 5215 5216 static void 5217 sppp_auth_send(const struct cp *cp, struct sppp *sp, 5218 unsigned int type, unsigned int id, 5219 ...) 5220 { 5221 STDDCL; 5222 struct lcp_header *lh; 5223 struct mbuf *m; 5224 u_char *p; 5225 int len; 5226 size_t pkthdrlen; 5227 unsigned int mlen; 5228 const char *msg; 5229 va_list ap; 5230 5231 KASSERT(SPPP_WLOCKED(sp)); 5232 5233 MGETHDR(m, M_DONTWAIT, MT_DATA); 5234 if (! m) 5235 return; 5236 m_reset_rcvif(m); 5237 5238 if (sp->pp_flags & PP_NOFRAMING) { 5239 *mtod(m, uint16_t *) = htons(cp->proto); 5240 pkthdrlen = 2; 5241 lh = (struct lcp_header *)(mtod(m, uint8_t *)+2); 5242 } else { 5243 struct ppp_header *h; 5244 h = mtod(m, struct ppp_header *); 5245 h->address = PPP_ALLSTATIONS; /* broadcast address */ 5246 h->control = PPP_UI; /* Unnumbered Info */ 5247 h->protocol = htons(cp->proto); 5248 pkthdrlen = PPP_HEADER_LEN; 5249 5250 lh = (struct lcp_header *)(h + 1); 5251 } 5252 5253 lh->type = type; 5254 lh->ident = id; 5255 p = (u_char *)(lh + 1); 5256 5257 va_start(ap, id); 5258 len = 0; 5259 5260 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 5261 msg = va_arg(ap, const char *); 5262 len += mlen; 5263 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 5264 va_end(ap); 5265 m_freem(m); 5266 return; 5267 } 5268 5269 memcpy(p, msg, mlen); 5270 p += mlen; 5271 } 5272 va_end(ap); 5273 5274 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 5275 lh->len = htons(LCP_HEADER_LEN + len); 5276 5277 if (debug) { 5278 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 5279 ifp->if_xname, cp->name, 5280 sppp_auth_type_name(cp->proto, lh->type), 5281 lh->ident, ntohs(lh->len)); 5282 if (len) 5283 sppp_print_bytes((u_char *)(lh + 1), len); 5284 addlog(">\n"); 5285 } 5286 if (IF_QFULL(&sp->pp_cpq)) { 5287 IF_DROP(&sp->pp_fastq); 5288 IF_DROP(&ifp->if_snd); 5289 m_freem(m); 5290 if_statinc(ifp, if_oerrors); 5291 return; 5292 } 5293 5294 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 5295 IF_ENQUEUE(&sp->pp_cpq, m); 5296 5297 if (! (ifp->if_flags & IFF_OACTIVE)) { 5298 SPPP_UNLOCK(sp); 5299 if_start_lock(ifp); 5300 SPPP_LOCK(sp, RW_WRITER); 5301 } 5302 } 5303 5304 static int 5305 sppp_auth_role(const struct cp *cp, struct sppp *sp) 5306 { 5307 int role; 5308 5309 role = SPPP_AUTH_NOROLE; 5310 5311 if (sp->hisauth.proto == cp->proto && 5312 ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO)) 5313 SET(role, SPPP_AUTH_SERV); 5314 5315 if (sp->myauth.proto == cp->proto) 5316 SET(role, SPPP_AUTH_PEER); 5317 5318 return role; 5319 } 5320 5321 static void 5322 sppp_auth_to_event(struct sppp *sp, void *xcp) 5323 { 5324 const struct cp *cp = xcp; 5325 bool override; 5326 int state; 5327 STDDCL; 5328 5329 KASSERT(SPPP_WLOCKED(sp)); 5330 KASSERT(!cpu_softintr_p()); 5331 5332 override = false; 5333 state = sp->scp[cp->protoidx].state; 5334 5335 if (sp->scp[cp->protoidx].rst_counter > 0) { 5336 /* override TO+ event */ 5337 switch (state) { 5338 case STATE_OPENED: 5339 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 5340 override = true; 5341 sp->chap.rechallenging = true; 5342 sp->chap.response_rcvd = false; 5343 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 5344 cp->scr(sp); 5345 } 5346 break; 5347 5348 case STATE_ACK_RCVD: 5349 override = true; 5350 cp->scr(sp); 5351 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 5352 break; 5353 } 5354 } 5355 5356 if (override) { 5357 if (debug) 5358 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 5359 ifp->if_xname, cp->name, 5360 sppp_state_name(state), 5361 sp->scp[cp->protoidx].rst_counter); 5362 sp->scp[cp->protoidx].rst_counter--; 5363 } else { 5364 sppp_to_event(sp, xcp); 5365 } 5366 } 5367 5368 static void 5369 sppp_auth_sca_scn(const struct cp *cp, struct sppp *sp) 5370 { 5371 static const char *succmsg = "Welcome!"; 5372 static const char *failmsg = "Failed..."; 5373 const char *msg; 5374 u_char type, rconfid, mlen; 5375 5376 KASSERT(SPPP_WLOCKED(sp)); 5377 5378 if (!ISSET(sppp_auth_role(cp, sp), SPPP_AUTH_SERV)) 5379 return; 5380 5381 rconfid = sp->scp[cp->protoidx].rconfid; 5382 5383 if (sp->scp[cp->protoidx].rcr_type == CP_RCR_ACK) { 5384 type = cp->proto == PPP_CHAP ? CHAP_SUCCESS : PAP_ACK; 5385 msg = succmsg; 5386 mlen = sizeof(succmsg) - 1; 5387 5388 sp->pp_auth_failures = 0; 5389 } else { 5390 type = cp->proto == PPP_CHAP ? CHAP_FAILURE : PAP_NAK; 5391 msg = failmsg; 5392 mlen = sizeof(failmsg) - 1; 5393 5394 /* shutdown LCP if auth failed */ 5395 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5396 sp->pp_auth_failures++; 5397 } 5398 5399 sppp_auth_send(cp, sp, type, rconfid, 5400 mlen, (const u_char *)msg, 0); 5401 } 5402 5403 /* 5404 * Send keepalive packets, every 10 seconds. 5405 */ 5406 static void 5407 sppp_keepalive(void *dummy) 5408 { 5409 struct sppp *sp; 5410 int s; 5411 time_t now; 5412 5413 SPPPQ_LOCK(); 5414 5415 s = splnet(); 5416 now = time_uptime; 5417 for (sp=spppq; sp; sp=sp->pp_next) { 5418 struct ifnet *ifp = NULL; 5419 5420 SPPP_LOCK(sp, RW_WRITER); 5421 ifp = &sp->pp_if; 5422 5423 /* check idle timeout */ 5424 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 5425 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 5426 /* idle timeout is enabled for this interface */ 5427 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 5428 if (ifp->if_flags & IFF_DEBUG) 5429 printf("%s: no activity for %lu seconds\n", 5430 sp->pp_if.if_xname, 5431 (unsigned long)(now-sp->pp_last_activity)); 5432 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5433 SPPP_UNLOCK(sp); 5434 continue; 5435 } 5436 } 5437 5438 /* Keepalive mode disabled or channel down? */ 5439 if (! (sp->pp_flags & PP_KEEPALIVE) || 5440 ! (ifp->if_flags & IFF_RUNNING)) { 5441 SPPP_UNLOCK(sp); 5442 continue; 5443 } 5444 5445 /* No keepalive in PPP mode if LCP not opened yet. */ 5446 if (! (sp->pp_flags & PP_CISCO) && 5447 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 5448 SPPP_UNLOCK(sp); 5449 continue; 5450 } 5451 5452 /* No echo reply, but maybe user data passed through? */ 5453 if ((now - sp->pp_last_receive) < sp->pp_max_noreceive) { 5454 sp->pp_alivecnt = 0; 5455 SPPP_UNLOCK(sp); 5456 continue; 5457 } 5458 5459 if (sp->pp_alivecnt >= sp->pp_maxalive) { 5460 /* No keepalive packets got. Stop the interface. */ 5461 sppp_wq_add(sp->wq_cp, &sp->work_ifdown); 5462 5463 if (! (sp->pp_flags & PP_CISCO)) { 5464 printf("%s: LCP keepalive timed out, going to restart the connection\n", 5465 ifp->if_xname); 5466 sp->pp_alivecnt = 0; 5467 5468 /* we are down, close all open protocols */ 5469 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5470 5471 /* And now prepare LCP to reestablish the link, if configured to do so. */ 5472 sp->lcp.reestablish = true; 5473 5474 SPPP_UNLOCK(sp); 5475 continue; 5476 } 5477 } 5478 if (sp->pp_alivecnt < sp->pp_maxalive) 5479 ++sp->pp_alivecnt; 5480 if (sp->pp_flags & PP_CISCO) 5481 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, 5482 ++sp->scp[IDX_LCP].seq, sp->scp[IDX_LCP].rseq); 5483 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 5484 int32_t nmagic = htonl(sp->lcp.magic); 5485 sp->lcp.echoid = ++sp->scp[IDX_LCP].seq; 5486 sppp_cp_send(sp, PPP_LCP, ECHO_REQ, 5487 sp->lcp.echoid, 4, &nmagic); 5488 } 5489 5490 SPPP_UNLOCK(sp); 5491 } 5492 splx(s); 5493 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 5494 5495 SPPPQ_UNLOCK(); 5496 } 5497 5498 #ifdef INET 5499 /* 5500 * Get both IP addresses. 5501 */ 5502 static void 5503 sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, uint32_t *srcmask) 5504 { 5505 struct ifnet *ifp = &sp->pp_if; 5506 struct ifaddr *ifa; 5507 struct sockaddr_in *si, *sm; 5508 uint32_t ssrc, ddst; 5509 int s; 5510 struct psref psref; 5511 5512 sm = NULL; 5513 ssrc = ddst = 0; 5514 /* 5515 * Pick the first AF_INET address from the list, 5516 * aliases don't make any sense on a p2p link anyway. 5517 */ 5518 si = 0; 5519 s = pserialize_read_enter(); 5520 IFADDR_READER_FOREACH(ifa, ifp) { 5521 if (ifa->ifa_addr->sa_family == AF_INET) { 5522 si = (struct sockaddr_in *)ifa->ifa_addr; 5523 sm = (struct sockaddr_in *)ifa->ifa_netmask; 5524 if (si) { 5525 ifa_acquire(ifa, &psref); 5526 break; 5527 } 5528 } 5529 } 5530 pserialize_read_exit(s); 5531 if (ifa) { 5532 if (si && si->sin_addr.s_addr) { 5533 ssrc = si->sin_addr.s_addr; 5534 if (srcmask) 5535 *srcmask = ntohl(sm->sin_addr.s_addr); 5536 } 5537 5538 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 5539 if (si && si->sin_addr.s_addr) 5540 ddst = si->sin_addr.s_addr; 5541 ifa_release(ifa, &psref); 5542 } 5543 5544 if (dst) *dst = ntohl(ddst); 5545 if (src) *src = ntohl(ssrc); 5546 } 5547 5548 /* 5549 * Set IP addresses. Must be called at splnet. 5550 * If an address is 0, leave it the way it is. 5551 */ 5552 static void 5553 sppp_set_ip_addrs(struct sppp *sp) 5554 { 5555 STDDCL; 5556 struct ifaddr *ifa; 5557 struct sockaddr_in *si, *dest; 5558 uint32_t myaddr = 0, hisaddr = 0; 5559 int s; 5560 5561 KASSERT(SPPP_WLOCKED(sp)); 5562 SPPP_UNLOCK(sp); 5563 IFNET_LOCK(ifp); 5564 SPPP_LOCK(sp, RW_WRITER); 5565 5566 /* 5567 * Pick the first AF_INET address from the list, 5568 * aliases don't make any sense on a p2p link anyway. 5569 */ 5570 si = dest = NULL; 5571 s = pserialize_read_enter(); 5572 IFADDR_READER_FOREACH(ifa, ifp) { 5573 if (ifa->ifa_addr->sa_family == AF_INET) { 5574 si = (struct sockaddr_in *)ifa->ifa_addr; 5575 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5576 break; 5577 } 5578 } 5579 pserialize_read_exit(s); 5580 5581 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 5582 myaddr = sp->ipcp.req_myaddr; 5583 else if (si != NULL) 5584 myaddr = ntohl(si->sin_addr.s_addr); 5585 5586 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 5587 hisaddr = sp->ipcp.req_hisaddr; 5588 else if (dest != NULL) 5589 hisaddr = ntohl(dest->sin_addr.s_addr); 5590 5591 if (si != NULL && dest != NULL) { 5592 int error; 5593 struct sockaddr_in new_sin = *si; 5594 struct sockaddr_in new_dst = *dest; 5595 5596 if (myaddr != 0) 5597 new_sin.sin_addr.s_addr = htonl(myaddr); 5598 if (hisaddr != 0) { 5599 new_dst.sin_addr.s_addr = htonl(hisaddr); 5600 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) 5601 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 5602 } 5603 5604 in_addrhash_remove(ifatoia(ifa)); 5605 5606 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5607 5608 in_addrhash_insert(ifatoia(ifa)); 5609 5610 if (debug && error) 5611 { 5612 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5613 ifp->if_xname, __func__, error); 5614 } 5615 if (!error) { 5616 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5617 } 5618 } 5619 5620 IFNET_UNLOCK(ifp); 5621 5622 sppp_notify_con(sp); 5623 } 5624 5625 /* 5626 * Clear IP addresses. Must be called at splnet. 5627 */ 5628 static void 5629 sppp_clear_ip_addrs(struct sppp *sp) 5630 { 5631 STDDCL; 5632 struct ifaddr *ifa; 5633 struct sockaddr_in *si, *dest; 5634 int s; 5635 5636 KASSERT(SPPP_WLOCKED(sp)); 5637 SPPP_UNLOCK(sp); 5638 IFNET_LOCK(ifp); 5639 SPPP_LOCK(sp, RW_WRITER); 5640 5641 /* 5642 * Pick the first AF_INET address from the list, 5643 * aliases don't make any sense on a p2p link anyway. 5644 */ 5645 si = dest = NULL; 5646 s = pserialize_read_enter(); 5647 IFADDR_READER_FOREACH(ifa, ifp) { 5648 if (ifa->ifa_addr->sa_family == AF_INET) { 5649 si = (struct sockaddr_in *)ifa->ifa_addr; 5650 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5651 break; 5652 } 5653 } 5654 pserialize_read_exit(s); 5655 5656 if (si != NULL) { 5657 struct sockaddr_in new_sin = *si; 5658 struct sockaddr_in new_dst = *dest; 5659 int error; 5660 5661 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 5662 new_sin.sin_addr.s_addr = 0; 5663 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 5664 new_dst.sin_addr.s_addr = sp->ipcp.saved_hisaddr; 5665 5666 in_addrhash_remove(ifatoia(ifa)); 5667 5668 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5669 5670 in_addrhash_insert(ifatoia(ifa)); 5671 5672 if (debug && error) 5673 { 5674 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5675 ifp->if_xname, __func__, error); 5676 } 5677 if (!error) { 5678 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5679 } 5680 } 5681 5682 IFNET_UNLOCK(ifp); 5683 } 5684 #endif 5685 5686 #ifdef INET6 5687 /* 5688 * Get both IPv6 addresses. 5689 */ 5690 static void 5691 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 5692 struct in6_addr *srcmask) 5693 { 5694 struct ifnet *ifp = &sp->pp_if; 5695 struct ifaddr *ifa; 5696 struct sockaddr_in6 *si, *sm; 5697 struct in6_addr ssrc, ddst; 5698 int s; 5699 struct psref psref; 5700 5701 sm = NULL; 5702 memset(&ssrc, 0, sizeof(ssrc)); 5703 memset(&ddst, 0, sizeof(ddst)); 5704 /* 5705 * Pick the first link-local AF_INET6 address from the list, 5706 * aliases don't make any sense on a p2p link anyway. 5707 */ 5708 si = 0; 5709 s = pserialize_read_enter(); 5710 IFADDR_READER_FOREACH(ifa, ifp) { 5711 if (ifa->ifa_addr->sa_family == AF_INET6) { 5712 si = (struct sockaddr_in6 *)ifa->ifa_addr; 5713 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 5714 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) { 5715 ifa_acquire(ifa, &psref); 5716 break; 5717 } 5718 } 5719 } 5720 pserialize_read_exit(s); 5721 5722 if (ifa) { 5723 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 5724 memcpy(&ssrc, &si->sin6_addr, sizeof(ssrc)); 5725 if (srcmask) { 5726 memcpy(srcmask, &sm->sin6_addr, 5727 sizeof(*srcmask)); 5728 } 5729 } 5730 5731 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 5732 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 5733 memcpy(&ddst, &si->sin6_addr, sizeof(ddst)); 5734 ifa_release(ifa, &psref); 5735 } 5736 5737 if (dst) 5738 memcpy(dst, &ddst, sizeof(*dst)); 5739 if (src) 5740 memcpy(src, &ssrc, sizeof(*src)); 5741 } 5742 5743 #ifdef IPV6CP_MYIFID_DYN 5744 /* 5745 * Generate random ifid. 5746 */ 5747 static void 5748 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 5749 { 5750 /* TBD */ 5751 } 5752 5753 /* 5754 * Set my IPv6 address. Must be called at splnet. 5755 */ 5756 static void 5757 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 5758 { 5759 STDDCL; 5760 struct ifaddr *ifa; 5761 struct sockaddr_in6 *sin6; 5762 int s; 5763 struct psref psref; 5764 5765 KASSERT(SPPP_WLOCKED(sp)); 5766 SPPP_UNLOCK(sp); 5767 IFNET_LOCK(ifp); 5768 SPPP_LOCK(sp, RW_WRITER); 5769 5770 /* 5771 * Pick the first link-local AF_INET6 address from the list, 5772 * aliases don't make any sense on a p2p link anyway. 5773 */ 5774 5775 sin6 = NULL; 5776 s = pserialize_read_enter(); 5777 IFADDR_READER_FOREACH(ifa, ifp) 5778 { 5779 if (ifa->ifa_addr->sa_family == AF_INET6) 5780 { 5781 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 5782 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 5783 ifa_acquire(ifa, &psref); 5784 break; 5785 } 5786 } 5787 } 5788 pserialize_read_exit(s); 5789 5790 if (ifa && sin6) 5791 { 5792 int error; 5793 struct sockaddr_in6 new_sin6 = *sin6; 5794 5795 memcpy(&new_sin6.sin6_addr, src, sizeof(new_sin6.sin6_addr)); 5796 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 5797 if (debug && error) 5798 { 5799 log(LOG_DEBUG, "%s: %s: in6_ifinit failed, error=%d\n", 5800 ifp->if_xname, __func__, error); 5801 } 5802 if (!error) { 5803 pfil_run_addrhooks(if_pfil, SIOCAIFADDR_IN6, ifa); 5804 } 5805 ifa_release(ifa, &psref); 5806 } 5807 5808 IFNET_UNLOCK(ifp); 5809 } 5810 #endif 5811 5812 /* 5813 * Suggest a candidate address to be used by peer. 5814 */ 5815 static void 5816 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 5817 { 5818 struct in6_addr myaddr; 5819 struct timeval tv; 5820 5821 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 5822 5823 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 5824 microtime(&tv); 5825 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 5826 myaddr.s6_addr[14] ^= 0xff; 5827 myaddr.s6_addr[15] ^= 0xff; 5828 } else { 5829 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 5830 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 5831 } 5832 if (suggest) 5833 memcpy(suggest, &myaddr, sizeof(myaddr)); 5834 } 5835 #endif /*INET6*/ 5836 5837 /* 5838 * Process ioctl requests specific to the PPP interface. 5839 * Permissions have already been checked. 5840 */ 5841 static int 5842 sppp_params(struct sppp *sp, u_long cmd, void *data) 5843 { 5844 switch (cmd) { 5845 case SPPPGETAUTHCFG: 5846 { 5847 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5848 int error; 5849 size_t len; 5850 5851 SPPP_LOCK(sp, RW_READER); 5852 5853 cfg->myauthflags = sp->myauth.flags; 5854 cfg->hisauthflags = sp->hisauth.flags; 5855 strlcpy(cfg->ifname, sp->pp_if.if_xname, sizeof(cfg->ifname)); 5856 cfg->hisauth = 0; 5857 if (sp->hisauth.proto) 5858 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5859 cfg->myauth = 0; 5860 if (sp->myauth.proto) 5861 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5862 if (cfg->myname_length == 0) { 5863 if (sp->myauth.name != NULL) 5864 cfg->myname_length = sp->myauth.name_len + 1; 5865 } else { 5866 if (sp->myauth.name == NULL) { 5867 cfg->myname_length = 0; 5868 } else { 5869 len = sp->myauth.name_len + 1; 5870 5871 if (cfg->myname_length < len) { 5872 SPPP_UNLOCK(sp); 5873 return (ENAMETOOLONG); 5874 } 5875 error = copyout(sp->myauth.name, cfg->myname, len); 5876 if (error) { 5877 SPPP_UNLOCK(sp); 5878 return error; 5879 } 5880 } 5881 } 5882 if (cfg->hisname_length == 0) { 5883 if (sp->hisauth.name != NULL) 5884 cfg->hisname_length = sp->hisauth.name_len + 1; 5885 } else { 5886 if (sp->hisauth.name == NULL) { 5887 cfg->hisname_length = 0; 5888 } else { 5889 len = sp->hisauth.name_len + 1; 5890 5891 if (cfg->hisname_length < len) { 5892 SPPP_UNLOCK(sp); 5893 return (ENAMETOOLONG); 5894 } 5895 error = copyout(sp->hisauth.name, cfg->hisname, len); 5896 if (error) { 5897 SPPP_UNLOCK(sp); 5898 return error; 5899 } 5900 } 5901 } 5902 SPPP_UNLOCK(sp); 5903 } 5904 break; 5905 case SPPPSETAUTHCFG: 5906 { 5907 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5908 int error; 5909 5910 SPPP_LOCK(sp, RW_WRITER); 5911 5912 if (sp->myauth.name) { 5913 free(sp->myauth.name, M_DEVBUF); 5914 sp->myauth.name = NULL; 5915 } 5916 if (sp->myauth.secret) { 5917 free(sp->myauth.secret, M_DEVBUF); 5918 sp->myauth.secret = NULL; 5919 } 5920 if (sp->hisauth.name) { 5921 free(sp->hisauth.name, M_DEVBUF); 5922 sp->hisauth.name = NULL; 5923 } 5924 if (sp->hisauth.secret) { 5925 free(sp->hisauth.secret, M_DEVBUF); 5926 sp->hisauth.secret = NULL; 5927 } 5928 5929 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5930 if (cfg->hisname_length >= MCLBYTES) { 5931 SPPP_UNLOCK(sp); 5932 return (ENAMETOOLONG); 5933 } 5934 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5935 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5936 if (error) { 5937 free(sp->hisauth.name, M_DEVBUF); 5938 sp->hisauth.name = NULL; 5939 SPPP_UNLOCK(sp); 5940 return error; 5941 } 5942 sp->hisauth.name_len = cfg->hisname_length - 1; 5943 sp->hisauth.name[sp->hisauth.name_len] = 0; 5944 } 5945 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5946 if (cfg->hissecret_length >= MCLBYTES) { 5947 SPPP_UNLOCK(sp); 5948 return (ENAMETOOLONG); 5949 } 5950 sp->hisauth.secret = malloc(cfg->hissecret_length, 5951 M_DEVBUF, M_WAITOK); 5952 error = copyin(cfg->hissecret, sp->hisauth.secret, 5953 cfg->hissecret_length); 5954 if (error) { 5955 free(sp->hisauth.secret, M_DEVBUF); 5956 sp->hisauth.secret = NULL; 5957 SPPP_UNLOCK(sp); 5958 return error; 5959 } 5960 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5961 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5962 } 5963 if (cfg->myname != NULL && cfg->myname_length > 0) { 5964 if (cfg->myname_length >= MCLBYTES) { 5965 SPPP_UNLOCK(sp); 5966 return (ENAMETOOLONG); 5967 } 5968 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5969 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5970 if (error) { 5971 free(sp->myauth.name, M_DEVBUF); 5972 sp->myauth.name = NULL; 5973 SPPP_UNLOCK(sp); 5974 return error; 5975 } 5976 sp->myauth.name_len = cfg->myname_length - 1; 5977 sp->myauth.name[sp->myauth.name_len] = 0; 5978 } 5979 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5980 if (cfg->mysecret_length >= MCLBYTES) { 5981 SPPP_UNLOCK(sp); 5982 return (ENAMETOOLONG); 5983 } 5984 sp->myauth.secret = malloc(cfg->mysecret_length, 5985 M_DEVBUF, M_WAITOK); 5986 error = copyin(cfg->mysecret, sp->myauth.secret, 5987 cfg->mysecret_length); 5988 if (error) { 5989 free(sp->myauth.secret, M_DEVBUF); 5990 sp->myauth.secret = NULL; 5991 SPPP_UNLOCK(sp); 5992 return error; 5993 } 5994 sp->myauth.secret_len = cfg->mysecret_length - 1; 5995 sp->myauth.secret[sp->myauth.secret_len] = 0; 5996 } 5997 sp->myauth.flags = cfg->myauthflags; 5998 if (cfg->myauth) 5999 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 6000 sp->hisauth.flags = cfg->hisauthflags; 6001 if (cfg->hisauth) 6002 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 6003 sp->pp_auth_failures = 0; 6004 if (sp->hisauth.proto != 0) 6005 SET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 6006 else 6007 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 6008 6009 SPPP_UNLOCK(sp); 6010 } 6011 break; 6012 case SPPPGETLCPCFG: 6013 { 6014 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 6015 6016 SPPP_LOCK(sp, RW_READER); 6017 lcpp->lcp_timeout = sp->lcp.timeout; 6018 SPPP_UNLOCK(sp); 6019 } 6020 break; 6021 case SPPPSETLCPCFG: 6022 { 6023 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 6024 6025 SPPP_LOCK(sp, RW_WRITER); 6026 sp->lcp.timeout = lcpp->lcp_timeout; 6027 SPPP_UNLOCK(sp); 6028 } 6029 break; 6030 case SPPPGETSTATUS: 6031 { 6032 struct spppstatus *status = (struct spppstatus *)data; 6033 6034 SPPP_LOCK(sp, RW_READER); 6035 status->phase = sp->pp_phase; 6036 SPPP_UNLOCK(sp); 6037 } 6038 break; 6039 case SPPPGETSTATUSNCP: 6040 { 6041 struct spppstatusncp *status = (struct spppstatusncp *)data; 6042 6043 SPPP_LOCK(sp, RW_READER); 6044 status->phase = sp->pp_phase; 6045 status->ncpup = sppp_cp_check(sp, CP_NCP); 6046 SPPP_UNLOCK(sp); 6047 } 6048 break; 6049 case SPPPGETIDLETO: 6050 { 6051 struct spppidletimeout *to = (struct spppidletimeout *)data; 6052 6053 SPPP_LOCK(sp, RW_READER); 6054 to->idle_seconds = sp->pp_idle_timeout; 6055 SPPP_UNLOCK(sp); 6056 } 6057 break; 6058 case SPPPSETIDLETO: 6059 { 6060 struct spppidletimeout *to = (struct spppidletimeout *)data; 6061 6062 SPPP_LOCK(sp, RW_WRITER); 6063 sp->pp_idle_timeout = to->idle_seconds; 6064 SPPP_UNLOCK(sp); 6065 } 6066 break; 6067 case SPPPSETAUTHFAILURE: 6068 { 6069 struct spppauthfailuresettings *afsettings = 6070 (struct spppauthfailuresettings *)data; 6071 6072 SPPP_LOCK(sp, RW_WRITER); 6073 sp->pp_max_auth_fail = afsettings->max_failures; 6074 sp->pp_auth_failures = 0; 6075 SPPP_UNLOCK(sp); 6076 } 6077 break; 6078 case SPPPGETAUTHFAILURES: 6079 { 6080 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 6081 6082 SPPP_LOCK(sp, RW_READER); 6083 stats->auth_failures = sp->pp_auth_failures; 6084 stats->max_failures = sp->pp_max_auth_fail; 6085 SPPP_UNLOCK(sp); 6086 } 6087 break; 6088 case SPPPSETDNSOPTS: 6089 { 6090 struct spppdnssettings *req = (struct spppdnssettings *)data; 6091 6092 SPPP_LOCK(sp, RW_WRITER); 6093 sp->query_dns = req->query_dns & 3; 6094 SPPP_UNLOCK(sp); 6095 } 6096 break; 6097 case SPPPGETDNSOPTS: 6098 { 6099 struct spppdnssettings *req = (struct spppdnssettings *)data; 6100 6101 SPPP_LOCK(sp, RW_READER); 6102 req->query_dns = sp->query_dns; 6103 SPPP_UNLOCK(sp); 6104 } 6105 break; 6106 case SPPPGETDNSADDRS: 6107 { 6108 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; 6109 6110 SPPP_LOCK(sp, RW_READER); 6111 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 6112 SPPP_UNLOCK(sp); 6113 } 6114 break; 6115 case SPPPGETKEEPALIVE: 6116 { 6117 struct spppkeepalivesettings *settings = 6118 (struct spppkeepalivesettings*)data; 6119 6120 SPPP_LOCK(sp, RW_READER); 6121 settings->maxalive = sp->pp_maxalive; 6122 settings->max_noreceive = sp->pp_max_noreceive; 6123 SPPP_UNLOCK(sp); 6124 } 6125 break; 6126 case SPPPSETKEEPALIVE: 6127 { 6128 struct spppkeepalivesettings *settings = 6129 (struct spppkeepalivesettings*)data; 6130 6131 SPPP_LOCK(sp, RW_WRITER); 6132 sp->pp_maxalive = settings->maxalive; 6133 sp->pp_max_noreceive = settings->max_noreceive; 6134 SPPP_UNLOCK(sp); 6135 } 6136 break; 6137 case SPPPGETLCPSTATUS: 6138 { 6139 struct sppplcpstatus *status = 6140 (struct sppplcpstatus *)data; 6141 6142 SPPP_LOCK(sp, RW_READER); 6143 status->state = sp->scp[IDX_LCP].state; 6144 status->opts = sp->lcp.opts; 6145 status->magic = sp->lcp.magic; 6146 status->mru = sp->lcp.mru; 6147 SPPP_UNLOCK(sp); 6148 } 6149 break; 6150 case SPPPGETIPCPSTATUS: 6151 { 6152 struct spppipcpstatus *status = 6153 (struct spppipcpstatus *)data; 6154 u_int32_t myaddr; 6155 6156 SPPP_LOCK(sp, RW_READER); 6157 status->state = sp->scp[IDX_IPCP].state; 6158 status->opts = sp->ipcp.opts; 6159 #ifdef INET 6160 kpreempt_disable(); 6161 sppp_get_ip_addrs(sp, &myaddr, 0, 0); 6162 kpreempt_enable(); 6163 #else 6164 myaddr = 0; 6165 #endif 6166 status->myaddr = ntohl(myaddr); 6167 SPPP_UNLOCK(sp); 6168 } 6169 break; 6170 case SPPPGETIPV6CPSTATUS: 6171 { 6172 struct spppipv6cpstatus *status = 6173 (struct spppipv6cpstatus *)data; 6174 6175 SPPP_LOCK(sp, RW_READER); 6176 status->state = sp->scp[IDX_IPV6CP].state; 6177 memcpy(status->my_ifid, sp->ipv6cp.my_ifid, 6178 sizeof(status->my_ifid)); 6179 memcpy(status->his_ifid, sp->ipv6cp.his_ifid, 6180 sizeof(status->his_ifid)); 6181 SPPP_UNLOCK(sp); 6182 } 6183 break; 6184 default: 6185 { 6186 int ret; 6187 6188 MODULE_HOOK_CALL(sppp_params_50_hook, (sp, cmd, data), 6189 enosys(), ret); 6190 if (ret != ENOSYS) 6191 return ret; 6192 return (EINVAL); 6193 } 6194 } 6195 return (0); 6196 } 6197 6198 static void 6199 sppp_phase_network(struct sppp *sp) 6200 { 6201 int i; 6202 6203 KASSERT(SPPP_WLOCKED(sp)); 6204 6205 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 6206 6207 /* Notify NCPs now. */ 6208 for (i = 0; i < IDX_COUNT; i++) 6209 if ((cps[i])->flags & CP_NCP) 6210 sppp_wq_add(sp->wq_cp, &sp->scp[i].work_open); 6211 } 6212 6213 static const char * 6214 sppp_cp_type_name(u_char type) 6215 { 6216 static char buf[12]; 6217 switch (type) { 6218 case CONF_REQ: return "conf-req"; 6219 case CONF_ACK: return "conf-ack"; 6220 case CONF_NAK: return "conf-nak"; 6221 case CONF_REJ: return "conf-rej"; 6222 case TERM_REQ: return "term-req"; 6223 case TERM_ACK: return "term-ack"; 6224 case CODE_REJ: return "code-rej"; 6225 case PROTO_REJ: return "proto-rej"; 6226 case ECHO_REQ: return "echo-req"; 6227 case ECHO_REPLY: return "echo-reply"; 6228 case DISC_REQ: return "discard-req"; 6229 } 6230 snprintf(buf, sizeof(buf), "0x%x", type); 6231 return buf; 6232 } 6233 6234 static const char * 6235 sppp_auth_type_name(u_short proto, u_char type) 6236 { 6237 static char buf[32]; 6238 const char *name; 6239 6240 switch (proto) { 6241 case PPP_CHAP: 6242 switch (type) { 6243 case CHAP_CHALLENGE: return "challenge"; 6244 case CHAP_RESPONSE: return "response"; 6245 case CHAP_SUCCESS: return "success"; 6246 case CHAP_FAILURE: return "failure"; 6247 default: name = "chap"; break; 6248 } 6249 break; 6250 6251 case PPP_PAP: 6252 switch (type) { 6253 case PAP_REQ: return "req"; 6254 case PAP_ACK: return "ack"; 6255 case PAP_NAK: return "nak"; 6256 default: name = "pap"; break; 6257 } 6258 break; 6259 6260 default: 6261 name = "bad"; 6262 break; 6263 } 6264 6265 snprintf(buf, sizeof(buf), "%s(%#x) %#x", name, proto, type); 6266 return buf; 6267 } 6268 6269 static const char * 6270 sppp_lcp_opt_name(u_char opt) 6271 { 6272 static char buf[12]; 6273 switch (opt) { 6274 case LCP_OPT_MRU: return "mru"; 6275 case LCP_OPT_ASYNC_MAP: return "async-map"; 6276 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 6277 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 6278 case LCP_OPT_MAGIC: return "magic"; 6279 case LCP_OPT_PROTO_COMP: return "proto-comp"; 6280 case LCP_OPT_ADDR_COMP: return "addr-comp"; 6281 case LCP_OPT_SELF_DESC_PAD: return "sdpad"; 6282 case LCP_OPT_CALL_BACK: return "callback"; 6283 case LCP_OPT_COMPOUND_FRMS: return "cmpd-frms"; 6284 case LCP_OPT_MP_MRRU: return "mrru"; 6285 case LCP_OPT_MP_SSNHF: return "mp-ssnhf"; 6286 case LCP_OPT_MP_EID: return "mp-eid"; 6287 } 6288 snprintf(buf, sizeof(buf), "0x%x", opt); 6289 return buf; 6290 } 6291 6292 static const char * 6293 sppp_ipcp_opt_name(u_char opt) 6294 { 6295 static char buf[12]; 6296 switch (opt) { 6297 case IPCP_OPT_ADDRESSES: return "addresses"; 6298 case IPCP_OPT_COMPRESSION: return "compression"; 6299 case IPCP_OPT_ADDRESS: return "address"; 6300 case IPCP_OPT_PRIMDNS: return "primdns"; 6301 case IPCP_OPT_SECDNS: return "secdns"; 6302 } 6303 snprintf(buf, sizeof(buf), "0x%x", opt); 6304 return buf; 6305 } 6306 6307 #ifdef INET6 6308 static const char * 6309 sppp_ipv6cp_opt_name(u_char opt) 6310 { 6311 static char buf[12]; 6312 switch (opt) { 6313 case IPV6CP_OPT_IFID: return "ifid"; 6314 case IPV6CP_OPT_COMPRESSION: return "compression"; 6315 } 6316 snprintf(buf, sizeof(buf), "0x%x", opt); 6317 return buf; 6318 } 6319 #endif 6320 6321 static const char * 6322 sppp_state_name(int state) 6323 { 6324 switch (state) { 6325 case STATE_INITIAL: return "initial"; 6326 case STATE_STARTING: return "starting"; 6327 case STATE_CLOSED: return "closed"; 6328 case STATE_STOPPED: return "stopped"; 6329 case STATE_CLOSING: return "closing"; 6330 case STATE_STOPPING: return "stopping"; 6331 case STATE_REQ_SENT: return "req-sent"; 6332 case STATE_ACK_RCVD: return "ack-rcvd"; 6333 case STATE_ACK_SENT: return "ack-sent"; 6334 case STATE_OPENED: return "opened"; 6335 } 6336 return "illegal"; 6337 } 6338 6339 static const char * 6340 sppp_phase_name(int phase) 6341 { 6342 switch (phase) { 6343 case SPPP_PHASE_DEAD: return "dead"; 6344 case SPPP_PHASE_ESTABLISH: return "establish"; 6345 case SPPP_PHASE_TERMINATE: return "terminate"; 6346 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 6347 case SPPP_PHASE_NETWORK: return "network"; 6348 } 6349 return "illegal"; 6350 } 6351 6352 static const char * 6353 sppp_proto_name(u_short proto) 6354 { 6355 static char buf[12]; 6356 switch (proto) { 6357 case PPP_LCP: return "lcp"; 6358 case PPP_IPCP: return "ipcp"; 6359 case PPP_PAP: return "pap"; 6360 case PPP_CHAP: return "chap"; 6361 case PPP_IPV6CP: return "ipv6cp"; 6362 } 6363 snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto); 6364 return buf; 6365 } 6366 6367 static void 6368 sppp_print_bytes(const u_char *p, u_short len) 6369 { 6370 addlog(" %02x", *p++); 6371 while (--len > 0) 6372 addlog("-%02x", *p++); 6373 } 6374 6375 static void 6376 sppp_print_string(const char *p, u_short len) 6377 { 6378 u_char c; 6379 6380 while (len-- > 0) { 6381 c = *p++; 6382 /* 6383 * Print only ASCII chars directly. RFC 1994 recommends 6384 * using only them, but we don't rely on it. */ 6385 if (c < ' ' || c > '~') 6386 addlog("\\x%x", c); 6387 else 6388 addlog("%c", c); 6389 } 6390 } 6391 6392 static const char * 6393 sppp_dotted_quad(uint32_t addr) 6394 { 6395 static char s[16]; 6396 snprintf(s, sizeof(s), "%d.%d.%d.%d", 6397 (int)((addr >> 24) & 0xff), 6398 (int)((addr >> 16) & 0xff), 6399 (int)((addr >> 8) & 0xff), 6400 (int)(addr & 0xff)); 6401 return s; 6402 } 6403 6404 /* a dummy, used to drop uninteresting events */ 6405 static void 6406 sppp_null(struct sppp *unused) 6407 { 6408 /* do just nothing */ 6409 } 6410 6411 static void 6412 sppp_tls(const struct cp *cp, struct sppp *sp) 6413 { 6414 6415 /* notify lcp that is lower layer */ 6416 sp->lcp.protos |= (1 << cp->protoidx); 6417 6418 if (sp->scp[IDX_LCP].state == STATE_OPENED) 6419 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_up); 6420 } 6421 6422 static void 6423 sppp_tlf(const struct cp *cp, struct sppp *sp) 6424 { 6425 STDDCL; 6426 6427 if (debug) 6428 log(LOG_DEBUG, "%s: %s tlf\n", ifp->if_xname, cp->name); 6429 6430 /* notify lcp that is lower layer */ 6431 sp->lcp.protos &= ~(1 << cp->protoidx); 6432 6433 /* cleanup */ 6434 if (sp->scp[cp->protoidx].rcr_buf != NULL) { 6435 kmem_free(sp->scp[cp->protoidx].rcr_buf, 6436 sp->scp[cp->protoidx].rcr_blen); 6437 } 6438 6439 sp->scp[cp->protoidx].rcr_buf = NULL; 6440 sp->scp[cp->protoidx].rcr_blen = 0; 6441 sp->scp[cp->protoidx].rcr_rlen = 0; 6442 6443 sppp_lcp_check_and_close(sp); 6444 } 6445 6446 static void 6447 sppp_sca_scn(const struct cp *cp, struct sppp *sp) 6448 { 6449 STDDCL; 6450 u_char rconfid, rlen; 6451 int type; 6452 void *buf; 6453 size_t blen; 6454 6455 rconfid = sp->scp[cp->protoidx].rconfid; 6456 buf = sp->scp[cp->protoidx].rcr_buf; 6457 rlen = sp->scp[cp->protoidx].rcr_rlen; 6458 blen = sp->scp[cp->protoidx].rcr_blen; 6459 6460 sp->scp[cp->protoidx].rcr_buf = NULL; 6461 sp->scp[cp->protoidx].rcr_blen = 0; 6462 6463 switch (sp->scp[cp->protoidx].rcr_type) { 6464 case CP_RCR_ACK: 6465 type = CONF_ACK; 6466 break; 6467 case CP_RCR_REJ: 6468 type = CONF_REJ; 6469 break; 6470 case CP_RCR_NAK: 6471 type = CONF_NAK; 6472 break; 6473 default: 6474 type = -1; 6475 break; 6476 } 6477 6478 sp->scp[cp->protoidx].rcr_type = CP_RCR_NONE; 6479 6480 if (buf != NULL) { 6481 if (rlen > 0 && type != -1) { 6482 if (debug) { 6483 log(LOG_DEBUG, "%s: send %s\n", 6484 ifp->if_xname, sppp_cp_type_name(type)); 6485 } 6486 sppp_cp_send(sp, cp->proto, type, rconfid, rlen, buf); 6487 } 6488 kmem_free(buf, blen); 6489 } 6490 } 6491 6492 static void 6493 sppp_ifdown(struct sppp *sp, void *xcp __unused) 6494 { 6495 6496 SPPP_UNLOCK(sp); 6497 if_down(&sp->pp_if); 6498 IF_PURGE(&sp->pp_cpq); 6499 SPPP_LOCK(sp, RW_WRITER); 6500 } 6501 6502 static void 6503 sppp_notify_up(struct sppp *sp) 6504 { 6505 6506 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_up); 6507 } 6508 6509 static void 6510 sppp_notify_down(struct sppp *sp) 6511 { 6512 6513 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_down); 6514 } 6515 6516 static void 6517 sppp_notify_tls_wlocked(struct sppp *sp) 6518 { 6519 6520 KASSERT(SPPP_WLOCKED(sp)); 6521 6522 if (!sp->pp_tls) 6523 return; 6524 6525 SPPP_UNLOCK(sp); 6526 sp->pp_tls(sp); 6527 SPPP_LOCK(sp, RW_WRITER); 6528 } 6529 6530 static void 6531 sppp_notify_tlf_wlocked(struct sppp *sp) 6532 { 6533 6534 KASSERT(SPPP_WLOCKED(sp)); 6535 6536 if (!sp->pp_tlf) 6537 return; 6538 6539 SPPP_UNLOCK(sp); 6540 sp->pp_tlf(sp); 6541 SPPP_LOCK(sp, RW_WRITER); 6542 } 6543 6544 static void 6545 sppp_notify_con(struct sppp *sp) 6546 { 6547 6548 if (!sp->pp_con) 6549 return; 6550 6551 sp->pp_con(sp); 6552 } 6553 6554 #ifdef INET6 6555 static void 6556 sppp_notify_con_wlocked(struct sppp *sp) 6557 { 6558 6559 KASSERT(SPPP_WLOCKED(sp)); 6560 6561 SPPP_UNLOCK(sp); 6562 sppp_notify_con(sp); 6563 SPPP_LOCK(sp, RW_WRITER); 6564 6565 } 6566 #endif 6567 6568 static void 6569 sppp_notify_chg_wlocked(struct sppp *sp) 6570 { 6571 6572 KASSERT(SPPP_WLOCKED(sp)); 6573 6574 if (!sp->pp_chg) 6575 return; 6576 6577 SPPP_UNLOCK(sp); 6578 sp->pp_chg(sp, sp->pp_phase); 6579 SPPP_LOCK(sp, RW_WRITER); 6580 } 6581 6582 static void 6583 sppp_wq_work(struct work *wk, void *xsp) 6584 { 6585 struct sppp *sp; 6586 struct sppp_work *work; 6587 6588 sp = xsp; 6589 work = container_of(wk, struct sppp_work, work); 6590 atomic_cas_uint(&work->state, SPPP_WK_BUSY, SPPP_WK_FREE); 6591 6592 SPPP_LOCK(sp, RW_WRITER); 6593 work->func(sp, work->arg); 6594 SPPP_UNLOCK(sp); 6595 } 6596 6597 static struct workqueue * 6598 sppp_wq_create(struct sppp *sp, const char *xnamebuf, pri_t prio, int ipl, int flags) 6599 { 6600 struct workqueue *wq; 6601 int error; 6602 6603 error = workqueue_create(&wq, xnamebuf, sppp_wq_work, 6604 (void *)sp, prio, ipl, flags); 6605 if (error) { 6606 panic("%s: workqueue_create failed [%s, %d]\n", 6607 sp->pp_if.if_xname, xnamebuf, error); 6608 } 6609 6610 return wq; 6611 } 6612 6613 static void 6614 sppp_wq_destroy(struct sppp *sp __unused, struct workqueue *wq) 6615 { 6616 6617 workqueue_destroy(wq); 6618 } 6619 6620 static void 6621 sppp_wq_set(struct sppp_work *work, 6622 void (*func)(struct sppp *, void *), void *arg) 6623 { 6624 6625 work->func = func; 6626 work->arg = arg; 6627 } 6628 6629 static void 6630 sppp_wq_add(struct workqueue *wq, struct sppp_work *work) 6631 { 6632 6633 if (atomic_cas_uint(&work->state, SPPP_WK_FREE, SPPP_WK_BUSY) 6634 != SPPP_WK_FREE) 6635 return; 6636 6637 KASSERT(work->func != NULL); 6638 kpreempt_disable(); 6639 workqueue_enqueue(wq, &work->work, NULL); 6640 kpreempt_enable(); 6641 } 6642 static void 6643 sppp_wq_wait(struct workqueue *wq, struct sppp_work *work) 6644 { 6645 6646 atomic_swap_uint(&work->state, SPPP_WK_UNAVAIL); 6647 workqueue_wait(wq, &work->work); 6648 } 6649 6650 /* 6651 * This file is large. Tell emacs to highlight it nevertheless. 6652 * 6653 * Local Variables: 6654 * hilit-auto-highlight-maxout: 120000 6655 * End: 6656 */ 6657 6658 /* 6659 * Module glue 6660 */ 6661 MODULE(MODULE_CLASS_MISC, sppp_subr, NULL); 6662 6663 static int 6664 sppp_subr_modcmd(modcmd_t cmd, void *arg) 6665 { 6666 6667 switch (cmd) { 6668 case MODULE_CMD_INIT: 6669 case MODULE_CMD_FINI: 6670 return 0; 6671 case MODULE_CMD_STAT: 6672 case MODULE_CMD_AUTOUNLOAD: 6673 default: 6674 return ENOTTY; 6675 } 6676 } 6677
Indexes created Fri Sep 26 08:10:20 GMT 2025