if_spppsubr.c revision 1.226
1 /* $NetBSD: if_spppsubr.c,v 1.226 2021/04/26 08:45:57 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 1.226 2021/04/26 08:45:57 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_REQ_SENT: 2157 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2158 /* fall through */ 2159 case STATE_ACK_SENT: 2160 cp->scan(cp, sp); 2161 break; 2162 case STATE_STOPPED: 2163 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2164 cp->scr(sp); 2165 cp->scan(cp, sp); 2166 break; 2167 case STATE_ACK_RCVD: 2168 sppp_cp_change_state(cp, sp, STATE_OPENED); 2169 if (debug) 2170 log(LOG_DEBUG, "%s: %s tlu\n", 2171 ifp->if_xname, 2172 cp->name); 2173 cp->tlu(sp); 2174 cp->scan(cp, sp); 2175 break; 2176 case STATE_CLOSING: 2177 case STATE_STOPPING: 2178 if (buf != NULL) { 2179 sp->scp[cp->protoidx].rcr_buf = NULL; 2180 sp->scp[cp->protoidx].rcr_blen = 0; 2181 kmem_free(buf, blen); 2182 } 2183 break; 2184 case STATE_CLOSED: 2185 if ((cp->flags & CP_AUTH) == 0) { 2186 sppp_cp_send(sp, cp->proto, TERM_ACK, 2187 sp->scp[cp->protoidx].rconfid, 0, 0); 2188 } 2189 break; 2190 default: 2191 printf("%s: %s illegal RCR+ in state %s\n", 2192 ifp->if_xname, cp->name, 2193 sppp_state_name(sp->scp[cp->protoidx].state)); 2194 if_statinc(ifp, if_ierrors); 2195 } 2196 } else { 2197 /* RCR- event */ 2198 switch (sp->scp[cp->protoidx].state) { 2199 case STATE_OPENED: 2200 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2201 cp->tld(sp); 2202 cp->scr(sp); 2203 cp->scan(cp, sp); 2204 break; 2205 case STATE_ACK_SENT: 2206 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2207 /* fall through */ 2208 case STATE_REQ_SENT: 2209 cp->scan(cp, sp); 2210 break; 2211 case STATE_STOPPED: 2212 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2213 cp->scr(sp); 2214 cp->scan(cp, sp); 2215 break; 2216 case STATE_ACK_RCVD: 2217 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2218 cp->scan(cp, sp); 2219 break; 2220 case STATE_CLOSING: 2221 case STATE_STOPPING: 2222 if (buf != NULL) { 2223 sp->scp[cp->protoidx].rcr_buf = NULL; 2224 sp->scp[cp->protoidx].rcr_blen = 0; 2225 kmem_free(buf, blen); 2226 } 2227 break; 2228 case STATE_CLOSED: 2229 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2230 if ((cp->flags & CP_AUTH) == 0) { 2231 sppp_cp_send(sp, cp->proto, TERM_ACK, 2232 sp->scp[cp->protoidx].rconfid, 0, 0); 2233 } 2234 break; 2235 default: 2236 printf("%s: %s illegal RCR- in state %s\n", 2237 ifp->if_xname, cp->name, 2238 sppp_state_name(sp->scp[cp->protoidx].state)); 2239 if_statinc(ifp, if_ierrors); 2240 } 2241 } 2242 } 2243 2244 static void 2245 sppp_rca_event(struct sppp *sp, void *xcp) 2246 { 2247 const struct cp *cp = xcp; 2248 STDDCL; 2249 2250 KASSERT(!cpu_softintr_p()); 2251 2252 switch (sp->scp[cp->protoidx].state) { 2253 case STATE_CLOSED: 2254 case STATE_STOPPED: 2255 if ((cp->flags & CP_AUTH) == 0) { 2256 sppp_cp_send(sp, cp->proto, TERM_ACK, 2257 sp->scp[cp->protoidx].rconfid, 0, 0); 2258 } 2259 break; 2260 case STATE_CLOSING: 2261 case STATE_STOPPING: 2262 break; 2263 case STATE_REQ_SENT: 2264 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2265 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2266 break; 2267 case STATE_OPENED: 2268 (cp->tld)(sp); 2269 /* fall through */ 2270 case STATE_ACK_RCVD: 2271 (cp->scr)(sp); 2272 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2273 break; 2274 case STATE_ACK_SENT: 2275 sppp_cp_change_state(cp, sp, STATE_OPENED); 2276 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2277 if (debug) 2278 log(LOG_DEBUG, "%s: %s tlu\n", 2279 ifp->if_xname, cp->name); 2280 (cp->tlu)(sp); 2281 break; 2282 default: 2283 printf("%s: %s illegal RCA in state %s\n", 2284 ifp->if_xname, cp->name, 2285 sppp_state_name(sp->scp[cp->protoidx].state)); 2286 if_statinc(ifp, if_ierrors); 2287 } 2288 } 2289 2290 static void 2291 sppp_rcn_event(struct sppp *sp, void *xcp) 2292 { 2293 const struct cp *cp = xcp; 2294 struct ifnet *ifp = &sp->pp_if; 2295 2296 KASSERT(!cpu_softintr_p()); 2297 2298 switch (sp->scp[cp->protoidx].state) { 2299 case STATE_CLOSED: 2300 case STATE_STOPPED: 2301 if ((cp->flags & CP_AUTH) == 0) { 2302 sppp_cp_send(sp, cp->proto, TERM_ACK, 2303 sp->scp[cp->protoidx].rconfid, 0, 0); 2304 } 2305 break; 2306 case STATE_REQ_SENT: 2307 case STATE_ACK_SENT: 2308 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2309 (cp->scr)(sp); 2310 break; 2311 case STATE_OPENED: 2312 (cp->tld)(sp); 2313 /* fall through */ 2314 case STATE_ACK_RCVD: 2315 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2316 (cp->scr)(sp); 2317 break; 2318 case STATE_CLOSING: 2319 case STATE_STOPPING: 2320 break; 2321 default: 2322 printf("%s: %s illegal RCN in state %s\n", 2323 ifp->if_xname, cp->name, 2324 sppp_state_name(sp->scp[cp->protoidx].state)); 2325 if_statinc(ifp, if_ierrors); 2326 } 2327 } 2328 2329 static void 2330 sppp_rtr_event(struct sppp *sp, void *xcp) 2331 { 2332 const struct cp *cp = xcp; 2333 STDDCL; 2334 2335 KASSERT(!cpu_softintr_p()); 2336 2337 switch (sp->scp[cp->protoidx].state) { 2338 case STATE_ACK_RCVD: 2339 case STATE_ACK_SENT: 2340 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2341 break; 2342 case STATE_CLOSED: 2343 case STATE_STOPPED: 2344 case STATE_CLOSING: 2345 case STATE_STOPPING: 2346 case STATE_REQ_SENT: 2347 break; 2348 case STATE_OPENED: 2349 (cp->tld)(sp); 2350 sp->scp[cp->protoidx].rst_counter = 0; 2351 sppp_cp_change_state(cp, sp, STATE_STOPPING); 2352 break; 2353 default: 2354 printf("%s: %s illegal RTR in state %s\n", 2355 ifp->if_xname, cp->name, 2356 sppp_state_name(sp->scp[cp->protoidx].state)); 2357 if_statinc(ifp, if_ierrors); 2358 return; 2359 } 2360 2361 /* Send Terminate-Ack packet. */ 2362 if (debug) 2363 log(LOG_DEBUG, "%s: %s send terminate-ack\n", 2364 ifp->if_xname, cp->name); 2365 if ((cp->flags & CP_AUTH) == 0) { 2366 sppp_cp_send(sp, cp->proto, TERM_ACK, 2367 sp->scp[cp->protoidx].rseq, 0, 0); 2368 } 2369 } 2370 2371 static void 2372 sppp_rta_event(struct sppp *sp, void *xcp) 2373 { 2374 const struct cp *cp = xcp; 2375 struct ifnet *ifp = &sp->pp_if; 2376 2377 KASSERT(!cpu_softintr_p()); 2378 2379 switch (sp->scp[cp->protoidx].state) { 2380 case STATE_CLOSED: 2381 case STATE_STOPPED: 2382 case STATE_REQ_SENT: 2383 case STATE_ACK_SENT: 2384 break; 2385 case STATE_CLOSING: 2386 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2387 (cp->tlf)(cp, sp); 2388 break; 2389 case STATE_STOPPING: 2390 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2391 (cp->tlf)(cp, sp); 2392 break; 2393 case STATE_ACK_RCVD: 2394 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2395 break; 2396 case STATE_OPENED: 2397 (cp->tld)(sp); 2398 (cp->scr)(sp); 2399 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2400 break; 2401 default: 2402 printf("%s: %s illegal RTA in state %s\n", 2403 ifp->if_xname, cp->name, 2404 sppp_state_name(sp->scp[cp->protoidx].state)); 2405 if_statinc(ifp, if_ierrors); 2406 } 2407 } 2408 2409 static void 2410 sppp_rxj_event(struct sppp *sp, void *xcp) 2411 { 2412 const struct cp *cp = xcp; 2413 struct ifnet *ifp = &sp->pp_if; 2414 2415 KASSERT(!cpu_softintr_p()); 2416 2417 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 2418 switch (sp->scp[cp->protoidx].state) { 2419 case STATE_CLOSED: 2420 case STATE_STOPPED: 2421 case STATE_REQ_SENT: 2422 case STATE_ACK_SENT: 2423 case STATE_CLOSING: 2424 case STATE_STOPPING: 2425 case STATE_OPENED: 2426 break; 2427 case STATE_ACK_RCVD: 2428 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2429 break; 2430 default: 2431 printf("%s: %s illegal RXJ- in state %s\n", 2432 ifp->if_xname, cp->name, 2433 sppp_state_name(sp->scp[cp->protoidx].state)); 2434 if_statinc(ifp, if_ierrors); 2435 } 2436 } 2437 2438 /* 2439 * Change the state of a control protocol in the state automaton. 2440 * Takes care of starting/stopping the restart timer. 2441 */ 2442 void 2443 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 2444 { 2445 2446 KASSERT(SPPP_WLOCKED(sp)); 2447 2448 sp->scp[cp->protoidx].state = newstate; 2449 callout_stop(&sp->scp[cp->protoidx].ch); 2450 switch (newstate) { 2451 case STATE_INITIAL: 2452 case STATE_STARTING: 2453 case STATE_CLOSED: 2454 case STATE_STOPPED: 2455 case STATE_OPENED: 2456 break; 2457 case STATE_CLOSING: 2458 case STATE_STOPPING: 2459 case STATE_REQ_SENT: 2460 case STATE_ACK_RCVD: 2461 case STATE_ACK_SENT: 2462 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2463 break; 2464 } 2465 } 2466 2467 /* 2468 *--------------------------------------------------------------------------* 2469 * * 2470 * The LCP implementation. * 2471 * * 2472 *--------------------------------------------------------------------------* 2473 */ 2474 static void 2475 sppp_lcp_init(struct sppp *sp) 2476 { 2477 2478 KASSERT(SPPP_WLOCKED(sp)); 2479 2480 sppp_cp_init(&lcp, sp); 2481 2482 SET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC); 2483 sp->lcp.magic = 0; 2484 sp->lcp.protos = 0; 2485 sp->lcp.max_terminate = 2; 2486 sp->lcp.max_configure = 10; 2487 sp->lcp.max_failure = 10; 2488 sp->lcp.tlf_sent = false; 2489 2490 /* 2491 * Initialize counters and timeout values. Note that we don't 2492 * use the 3 seconds suggested in RFC 1661 since we are likely 2493 * running on a fast link. XXX We should probably implement 2494 * the exponential backoff option. Note that these values are 2495 * relevant for all control protocols, not just LCP only. 2496 */ 2497 sp->lcp.timeout = 1 * hz; 2498 } 2499 2500 static void 2501 sppp_lcp_up(struct sppp *sp, void *xcp) 2502 { 2503 const struct cp *cp = xcp; 2504 int pidx; 2505 STDDCL; 2506 2507 KASSERT(SPPP_WLOCKED(sp)); 2508 2509 pidx = cp->protoidx; 2510 /* Initialize activity timestamp: opening a connection is an activity */ 2511 sp->pp_last_receive = sp->pp_last_activity = time_uptime; 2512 2513 /* 2514 * If this interface is passive or dial-on-demand, and we are 2515 * still in Initial state, it means we've got an incoming 2516 * call. Activate the interface. 2517 */ 2518 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2519 if (debug) 2520 log(LOG_DEBUG, 2521 "%s: Up event", ifp->if_xname); 2522 ifp->if_flags |= IFF_RUNNING; 2523 if (sp->scp[pidx].state == STATE_INITIAL) { 2524 if (debug) 2525 addlog("(incoming call)\n"); 2526 sp->pp_flags |= PP_CALLIN; 2527 sppp_wq_add(sp->wq_cp, &sp->scp[pidx].work_open); 2528 } else if (debug) 2529 addlog("\n"); 2530 } 2531 2532 sppp_up_event(sp, xcp); 2533 } 2534 2535 static void 2536 sppp_lcp_down(struct sppp *sp, void *xcp) 2537 { 2538 const struct cp *cp = xcp; 2539 int pidx; 2540 STDDCL; 2541 2542 KASSERT(SPPP_WLOCKED(sp)); 2543 KASSERT(!cpu_softintr_p()); 2544 2545 pidx = cp->protoidx; 2546 sppp_down_event(sp, xcp); 2547 2548 /* 2549 * We need to do tls to restart when a down event is caused 2550 * by the last tlf. 2551 */ 2552 if (sp->scp[pidx].state == STATE_STARTING && 2553 sp->lcp.tlf_sent) { 2554 cp->tls(cp, sp); 2555 sp->lcp.tlf_sent = false; 2556 } 2557 2558 /* 2559 * If this is neither a dial-on-demand nor a passive 2560 * interface, simulate an ``ifconfig down'' action, so the 2561 * administrator can force a redial by another ``ifconfig 2562 * up''. XXX For leased line operation, should we immediately 2563 * try to reopen the connection here? 2564 */ 2565 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2566 if (debug) 2567 log(LOG_INFO, 2568 "%s: Down event (carrier loss), taking interface down.\n", 2569 ifp->if_xname); 2570 SPPP_UNLOCK(sp); 2571 if_down(ifp); 2572 SPPP_LOCK(sp, RW_WRITER); 2573 2574 if (sp->lcp.reestablish) 2575 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 2576 } else { 2577 if (debug) 2578 log(LOG_DEBUG, 2579 "%s: Down event (carrier loss)\n", 2580 ifp->if_xname); 2581 2582 sp->pp_flags &= ~PP_CALLIN; 2583 if (sp->scp[pidx].state != STATE_INITIAL) 2584 sppp_wq_add(sp->wq_cp, &sp->scp[pidx].work_close); 2585 ifp->if_flags &= ~IFF_RUNNING; 2586 } 2587 sp->scp[pidx].fail_counter = 0; 2588 } 2589 2590 static void 2591 sppp_lcp_open(struct sppp *sp, void *xcp) 2592 { 2593 2594 KASSERT(SPPP_WLOCKED(sp)); 2595 KASSERT(!cpu_softintr_p()); 2596 2597 sp->lcp.reestablish = false; 2598 sp->scp[IDX_LCP].fail_counter = 0; 2599 2600 if (sp->pp_if.if_mtu < PP_MTU) { 2601 sp->lcp.mru = sp->pp_if.if_mtu; 2602 SET(sp->lcp.opts, SPPP_LCP_OPT_MRU); 2603 } else { 2604 sp->lcp.mru = PP_MTU; 2605 } 2606 sp->lcp.their_mru = PP_MTU; 2607 2608 /* 2609 * If we are authenticator, negotiate LCP_AUTH 2610 */ 2611 if (sp->hisauth.proto != 0) 2612 SET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 2613 else 2614 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 2615 sp->pp_flags &= ~PP_NEEDAUTH; 2616 sppp_open_event(sp, xcp); 2617 } 2618 2619 2620 /* 2621 * Analyze a configure request. Return true if it was agreeable, and 2622 * caused action sca, false if it has been rejected or nak'ed, and 2623 * caused action scn. (The return value is used to make the state 2624 * transition decision in the state automaton.) 2625 */ 2626 static enum cp_rcr_type 2627 sppp_lcp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 2628 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 2629 { 2630 STDDCL; 2631 u_char *buf, *r, *p, l, blen; 2632 enum cp_rcr_type type; 2633 int len, rlen; 2634 uint32_t nmagic; 2635 u_short authproto; 2636 2637 KASSERT(SPPP_WLOCKED(sp)); 2638 2639 if (origlen < sizeof(*h)) 2640 return CP_RCR_DROP; 2641 2642 origlen -= sizeof(*h); 2643 type = CP_RCR_NONE; 2644 type = 0; 2645 2646 if (origlen <= 0) 2647 return CP_RCR_DROP; 2648 else 2649 blen = origlen; 2650 2651 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 2652 if (buf == NULL) 2653 return CP_RCR_DROP; 2654 2655 if (debug) 2656 log(LOG_DEBUG, "%s: lcp parse opts:", 2657 ifp->if_xname); 2658 2659 /* pass 1: check for things that need to be rejected */ 2660 p = (void *)(h + 1); 2661 r = buf; 2662 rlen = 0; 2663 for (len = origlen; len > 1; len-= l, p += l) { 2664 l = p[1]; 2665 if (l == 0) 2666 break; 2667 2668 /* Sanity check option length */ 2669 if (l > len) { 2670 /* 2671 * Malicious option - drop immediately. 2672 * XXX Maybe we should just RXJ it? 2673 */ 2674 addlog("%s: received malicious LCP option 0x%02x, " 2675 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp->if_xname, 2676 p[0], l, len); 2677 type = CP_RCR_ERR; 2678 goto end; 2679 } 2680 if (debug) 2681 addlog(" %s", sppp_lcp_opt_name(*p)); 2682 switch (p[0]) { 2683 case LCP_OPT_MAGIC: 2684 /* Magic number. */ 2685 /* fall through, both are same length */ 2686 case LCP_OPT_ASYNC_MAP: 2687 /* Async control character map. */ 2688 if (len >= 6 || l == 6) 2689 continue; 2690 if (debug) 2691 addlog(" [invalid]"); 2692 break; 2693 case LCP_OPT_MP_EID: 2694 if (len >= l && l >= 3) { 2695 switch (p[2]) { 2696 case 0: if (l==3+ 0) continue;break; 2697 case 2: if (l==3+ 4) continue;break; 2698 case 3: if (l==3+ 6) continue;break; 2699 case 6: if (l==3+16) continue;break; 2700 case 1: /* FALLTHROUGH */ 2701 case 4: if (l<=3+20) continue;break; 2702 case 5: if (l<=3+15) continue;break; 2703 /* XXX should it be default: continue;? */ 2704 } 2705 } 2706 if (debug) 2707 addlog(" [invalid class %d len %d]", p[2], l); 2708 break; 2709 case LCP_OPT_MP_SSNHF: 2710 if (len >= 2 && l == 2) { 2711 if (debug) 2712 addlog(" [rej]"); 2713 break; 2714 } 2715 if (debug) 2716 addlog(" [invalid]"); 2717 break; 2718 case LCP_OPT_MP_MRRU: 2719 /* Multilink maximum received reconstructed unit */ 2720 /* should be fall through, both are same length */ 2721 /* FALLTHROUGH */ 2722 case LCP_OPT_MRU: 2723 /* Maximum receive unit. */ 2724 if (len >= 4 && l == 4) 2725 continue; 2726 if (debug) 2727 addlog(" [invalid]"); 2728 break; 2729 case LCP_OPT_AUTH_PROTO: 2730 if (len < 4) { 2731 if (debug) 2732 addlog(" [invalid]"); 2733 break; 2734 } 2735 authproto = (p[2] << 8) + p[3]; 2736 if (authproto == PPP_CHAP && l != 5) { 2737 if (debug) 2738 addlog(" [invalid chap len]"); 2739 break; 2740 } 2741 if (ISSET(sp->myauth.flags, SPPP_AUTHFLAG_PASSIVEAUTHPROTO)) { 2742 if (authproto == PPP_PAP || authproto == PPP_CHAP) 2743 sp->myauth.proto = authproto; 2744 } 2745 if (sp->myauth.proto == 0) { 2746 /* we are not configured to do auth */ 2747 if (debug) 2748 addlog(" [not configured]"); 2749 break; 2750 } 2751 /* 2752 * Remote want us to authenticate, remember this, 2753 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2754 * up. 2755 */ 2756 sp->pp_flags |= PP_NEEDAUTH; 2757 continue; 2758 default: 2759 /* Others not supported. */ 2760 if (debug) 2761 addlog(" [rej]"); 2762 break; 2763 } 2764 if (rlen + l > blen) { 2765 if (debug) 2766 addlog(" [overflow]"); 2767 continue; 2768 } 2769 /* Add the option to rejected list. */ 2770 memcpy(r, p, l); 2771 r += l; 2772 rlen += l; 2773 } 2774 2775 if (rlen > 0) { 2776 type = CP_RCR_REJ; 2777 goto end; 2778 } 2779 2780 if (debug) 2781 addlog("\n"); 2782 2783 /* 2784 * pass 2: check for option values that are unacceptable and 2785 * thus require to be nak'ed. 2786 */ 2787 if (debug) 2788 log(LOG_DEBUG, "%s: lcp parse opt values: ", 2789 ifp->if_xname); 2790 2791 p = (void *)(h + 1); 2792 r = buf; 2793 rlen = 0; 2794 for (len = origlen; len > 0; len -= l, p += l) { 2795 l = p[1]; 2796 if (l == 0) 2797 break; 2798 2799 if (debug) 2800 addlog(" %s", sppp_lcp_opt_name(*p)); 2801 switch (p[0]) { 2802 case LCP_OPT_MAGIC: 2803 /* Magic number -- extract. */ 2804 nmagic = (uint32_t)p[2] << 24 | 2805 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2806 if (nmagic != sp->lcp.magic) { 2807 if (debug) 2808 addlog(" 0x%x", nmagic); 2809 continue; 2810 } 2811 /* 2812 * Local and remote magics equal -- loopback? 2813 */ 2814 if (sp->pp_loopcnt >= LOOPALIVECNT*5) { 2815 printf ("%s: loopback\n", 2816 ifp->if_xname); 2817 sp->pp_loopcnt = 0; 2818 if (ifp->if_flags & IFF_UP) { 2819 SPPP_UNLOCK(sp); 2820 if_down(ifp); 2821 SPPP_LOCK(sp, RW_WRITER); 2822 2823 IF_PURGE(&sp->pp_cpq); 2824 /* XXX ? */ 2825 sppp_wq_add(sp->wq_cp, 2826 &sp->scp[IDX_LCP].work_down); 2827 sppp_wq_add(sp->wq_cp, 2828 &sp->scp[IDX_LCP].work_up); 2829 } 2830 } else if (debug) 2831 addlog(" [glitch]"); 2832 ++sp->pp_loopcnt; 2833 /* 2834 * We negate our magic here, and NAK it. If 2835 * we see it later in an NAK packet, we 2836 * suggest a new one. 2837 */ 2838 nmagic = ~sp->lcp.magic; 2839 /* Gonna NAK it. */ 2840 p[2] = nmagic >> 24; 2841 p[3] = nmagic >> 16; 2842 p[4] = nmagic >> 8; 2843 p[5] = nmagic; 2844 break; 2845 2846 case LCP_OPT_ASYNC_MAP: 2847 /* 2848 * Async control character map -- just ignore it. 2849 * 2850 * Quote from RFC 1662, chapter 6: 2851 * To enable this functionality, synchronous PPP 2852 * implementations MUST always respond to the 2853 * Async-Control-Character-Map Configuration 2854 * Option with the LCP Configure-Ack. However, 2855 * acceptance of the Configuration Option does 2856 * not imply that the synchronous implementation 2857 * will do any ACCM mapping. Instead, all such 2858 * octet mapping will be performed by the 2859 * asynchronous-to-synchronous converter. 2860 */ 2861 continue; 2862 2863 case LCP_OPT_MRU: 2864 /* 2865 * Maximum receive unit. Always agreeable, 2866 * but ignored by now. 2867 */ 2868 sp->lcp.their_mru = p[2] * 256 + p[3]; 2869 if (debug) 2870 addlog(" %ld", sp->lcp.their_mru); 2871 continue; 2872 2873 case LCP_OPT_AUTH_PROTO: 2874 authproto = (p[2] << 8) + p[3]; 2875 if (ISSET(sp->myauth.flags, SPPP_AUTHFLAG_PASSIVEAUTHPROTO)) { 2876 if (authproto == PPP_PAP || authproto == PPP_CHAP) 2877 sp->myauth.proto = authproto; 2878 } 2879 if (sp->myauth.proto == authproto) { 2880 if (authproto != PPP_CHAP || p[4] == CHAP_MD5) { 2881 continue; 2882 } 2883 if (debug) 2884 addlog(" [chap without MD5]"); 2885 } else { 2886 if (debug) 2887 addlog(" [mine %s != his %s]", 2888 sppp_proto_name(sp->myauth.proto), 2889 sppp_proto_name(authproto)); 2890 } 2891 /* not agreed, nak */ 2892 if (sp->myauth.proto == PPP_CHAP) { 2893 l = 5; 2894 } else { 2895 l = 4; 2896 } 2897 2898 if (rlen + l > blen) { 2899 if (debug) 2900 addlog(" [overflow]"); 2901 continue; 2902 } 2903 2904 r[0] = LCP_OPT_AUTH_PROTO; 2905 r[1] = l; 2906 r[2] = sp->myauth.proto >> 8; 2907 r[3] = sp->myauth.proto & 0xff; 2908 if (sp->myauth.proto == PPP_CHAP) 2909 r[4] = CHAP_MD5; 2910 rlen += l; 2911 r += l; 2912 continue; 2913 case LCP_OPT_MP_EID: 2914 /* 2915 * Endpoint identification. 2916 * Always agreeable, 2917 * but ignored by now. 2918 */ 2919 if (debug) { 2920 addlog(" type %d", p[2]); 2921 sppp_print_bytes(p+3, p[1]-3); 2922 } 2923 continue; 2924 case LCP_OPT_MP_MRRU: 2925 /* 2926 * Maximum received reconstructed unit. 2927 * Always agreeable, 2928 * but ignored by now. 2929 */ 2930 sp->lcp.their_mrru = p[2] * 256 + p[3]; 2931 if (debug) 2932 addlog(" %ld", sp->lcp.their_mrru); 2933 continue; 2934 } 2935 if (rlen + l > blen) { 2936 if (debug) 2937 addlog(" [overflow]"); 2938 continue; 2939 } 2940 /* Add the option to nak'ed list. */ 2941 memcpy(r, p, l); 2942 r += l; 2943 rlen += l; 2944 } 2945 2946 if (rlen > 0) { 2947 if (++sp->scp[IDX_LCP].fail_counter >= sp->lcp.max_failure) { 2948 if (debug) 2949 addlog(" max_failure (%d) exceeded, ", 2950 sp->lcp.max_failure); 2951 type = CP_RCR_REJ; 2952 } else { 2953 type = CP_RCR_NAK; 2954 } 2955 } else { 2956 type = CP_RCR_ACK; 2957 rlen = origlen; 2958 memcpy(r, h + 1, rlen); 2959 sp->scp[IDX_LCP].fail_counter = 0; 2960 sp->pp_loopcnt = 0; 2961 } 2962 2963 end: 2964 if (debug) 2965 addlog("\n"); 2966 2967 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 2968 if (buf != NULL) 2969 kmem_intr_free(buf, blen); 2970 } else { 2971 *msgbuf = buf; 2972 *buflen = blen; 2973 *msglen = rlen; 2974 } 2975 2976 return type; 2977 } 2978 2979 /* 2980 * Analyze the LCP Configure-Reject option list, and adjust our 2981 * negotiation. 2982 */ 2983 static void 2984 sppp_lcp_confrej(struct sppp *sp, struct lcp_header *h, int len) 2985 { 2986 STDDCL; 2987 u_char *p, l; 2988 2989 KASSERT(SPPP_WLOCKED(sp)); 2990 2991 if (len <= sizeof(*h)) 2992 return; 2993 2994 len -= sizeof(*h); 2995 2996 if (debug) 2997 log(LOG_DEBUG, "%s: lcp rej opts:", 2998 ifp->if_xname); 2999 3000 p = (void *)(h + 1); 3001 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3002 /* Sanity check option length */ 3003 if (l > len) { 3004 /* 3005 * Malicious option - drop immediately. 3006 * XXX Maybe we should just RXJ it? 3007 */ 3008 addlog("%s: received malicious LCP option, " 3009 "dropping.\n", ifp->if_xname); 3010 goto end; 3011 } 3012 if (debug) 3013 addlog(" %s", sppp_lcp_opt_name(*p)); 3014 switch (p[0]) { 3015 case LCP_OPT_MAGIC: 3016 /* Magic number -- can't use it, use 0 */ 3017 CLR(sp->lcp.opts, SPPP_LCP_OPT_MAGIC); 3018 sp->lcp.magic = 0; 3019 break; 3020 case LCP_OPT_MRU: 3021 /* 3022 * We try to negotiate a lower MRU if the underlying 3023 * link's MTU is less than PP_MTU (e.g. PPPoE). If the 3024 * peer rejects this lower rate, fallback to the 3025 * default. 3026 */ 3027 if (debug) { 3028 addlog("%s: warning: peer rejected our MRU of " 3029 "%ld bytes. Defaulting to %d bytes\n", 3030 ifp->if_xname, sp->lcp.mru, PP_MTU); 3031 } 3032 CLR(sp->lcp.opts, SPPP_LCP_OPT_MRU); 3033 sp->lcp.mru = PP_MTU; 3034 break; 3035 case LCP_OPT_AUTH_PROTO: 3036 /* 3037 * Peer doesn't want to authenticate himself, 3038 * deny unless this is a dialout call, and 3039 * SPPP_AUTHFLAG_NOCALLOUT is set. 3040 */ 3041 if ((sp->pp_flags & PP_CALLIN) == 0 && 3042 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 3043 if (debug) 3044 addlog(" [don't insist on auth " 3045 "for callout]"); 3046 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 3047 break; 3048 } 3049 if (debug) 3050 addlog("[access denied]\n"); 3051 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3052 break; 3053 } 3054 } 3055 if (debug) 3056 addlog("\n"); 3057 end: 3058 return; 3059 } 3060 3061 /* 3062 * Analyze the LCP Configure-NAK option list, and adjust our 3063 * negotiation. 3064 */ 3065 static void 3066 sppp_lcp_confnak(struct sppp *sp, struct lcp_header *h, int len) 3067 { 3068 STDDCL; 3069 u_char *p, l; 3070 uint32_t magic; 3071 3072 KASSERT(SPPP_WLOCKED(sp)); 3073 3074 if (len <= sizeof(*h)) 3075 return; 3076 len -= sizeof(*h); 3077 3078 if (debug) 3079 log(LOG_DEBUG, "%s: lcp nak opts:", 3080 ifp->if_xname); 3081 3082 p = (void *)(h + 1); 3083 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3084 /* Sanity check option length */ 3085 if (l > len) { 3086 /* 3087 * Malicious option - drop immediately. 3088 * XXX Maybe we should just RXJ it? 3089 */ 3090 addlog("%s: received malicious LCP option, " 3091 "dropping.\n", ifp->if_xname); 3092 goto end; 3093 } 3094 if (debug) 3095 addlog(" %s", sppp_lcp_opt_name(*p)); 3096 switch (p[0]) { 3097 case LCP_OPT_MAGIC: 3098 /* Magic number -- renegotiate */ 3099 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC) && 3100 len >= 6 && l == 6) { 3101 magic = (uint32_t)p[2] << 24 | 3102 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 3103 /* 3104 * If the remote magic is our negated one, 3105 * this looks like a loopback problem. 3106 * Suggest a new magic to make sure. 3107 */ 3108 if (magic == ~sp->lcp.magic) { 3109 if (debug) 3110 addlog(" magic glitch"); 3111 sp->lcp.magic = cprng_fast32(); 3112 } else { 3113 sp->lcp.magic = magic; 3114 if (debug) 3115 addlog(" %d", magic); 3116 } 3117 } 3118 break; 3119 case LCP_OPT_MRU: 3120 /* 3121 * Peer wants to advise us to negotiate an MRU. 3122 * Agree on it if it's reasonable, or use 3123 * default otherwise. 3124 */ 3125 if (len >= 4 && l == 4) { 3126 u_int mru = p[2] * 256 + p[3]; 3127 if (debug) 3128 addlog(" %d", mru); 3129 if (mru < PPP_MINMRU || mru > sp->pp_if.if_mtu) 3130 mru = sp->pp_if.if_mtu; 3131 sp->lcp.mru = mru; 3132 SET(sp->lcp.opts, SPPP_LCP_OPT_MRU); 3133 } 3134 break; 3135 case LCP_OPT_AUTH_PROTO: 3136 /* 3137 * Peer doesn't like our authentication method, 3138 * deny. 3139 */ 3140 if (debug) 3141 addlog("[access denied]\n"); 3142 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3143 break; 3144 } 3145 } 3146 if (debug) 3147 addlog("\n"); 3148 end: 3149 return; 3150 } 3151 3152 static void 3153 sppp_lcp_tlu(struct sppp *sp) 3154 { 3155 STDDCL; 3156 int i; 3157 3158 KASSERT(SPPP_WLOCKED(sp)); 3159 3160 /* unlock for IFNET_LOCK and if_up() */ 3161 SPPP_UNLOCK(sp); 3162 3163 /* XXX ? */ 3164 if (! (ifp->if_flags & IFF_UP) && 3165 (ifp->if_flags & IFF_RUNNING)) { 3166 /* Coming out of loopback mode. */ 3167 if_up(ifp); 3168 } 3169 3170 IFNET_LOCK(ifp); 3171 SPPP_LOCK(sp, RW_WRITER); 3172 3173 if (ifp->if_mtu > sp->lcp.their_mru) { 3174 sp->pp_saved_mtu = ifp->if_mtu; 3175 ifp->if_mtu = sp->lcp.their_mru; 3176 if (debug) { 3177 log(LOG_DEBUG, 3178 "%s: setting MTU " 3179 "from %"PRIu64" bytes " 3180 "to %"PRIu64" bytes\n", 3181 ifp->if_xname, sp->pp_saved_mtu, 3182 ifp->if_mtu); 3183 } 3184 } 3185 IFNET_UNLOCK(ifp); 3186 3187 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO) || 3188 (sp->pp_flags & PP_NEEDAUTH) != 0) 3189 sppp_change_phase(sp, SPPP_PHASE_AUTHENTICATE); 3190 else 3191 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 3192 3193 /* 3194 * Open all authentication protocols. This is even required 3195 * if we already proceeded to network phase, since it might be 3196 * that remote wants us to authenticate, so we might have to 3197 * send a PAP request. Undesired authentication protocols 3198 * don't do anything when they get an Open event. 3199 */ 3200 for (i = 0; i < IDX_COUNT; i++) 3201 if ((cps[i])->flags & CP_AUTH) { 3202 sppp_wq_add(sp->wq_cp, 3203 &sp->scp[(cps[i])->protoidx].work_open); 3204 } 3205 3206 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 3207 /* Notify all NCPs. */ 3208 for (i = 0; i < IDX_COUNT; i++) 3209 if ((cps[i])->flags & CP_NCP) { 3210 sppp_wq_add(sp->wq_cp, 3211 &sp->scp[(cps[i])->protoidx].work_open); 3212 } 3213 } 3214 3215 /* notify low-level driver of state change */ 3216 sppp_notify_chg_wlocked(sp); 3217 } 3218 3219 static void 3220 sppp_lcp_tld(struct sppp *sp) 3221 { 3222 STDDCL; 3223 int i, pi, phase; 3224 3225 KASSERT(SPPP_WLOCKED(sp)); 3226 3227 phase = sp->pp_phase; 3228 3229 sppp_change_phase(sp, SPPP_PHASE_TERMINATE); 3230 3231 if (sp->pp_saved_mtu > 0) { 3232 SPPP_UNLOCK(sp); 3233 IFNET_LOCK(ifp); 3234 SPPP_LOCK(sp, RW_WRITER); 3235 3236 if (debug) { 3237 log(LOG_DEBUG, 3238 "%s: setting MTU " 3239 "from %"PRIu64" bytes " 3240 "to %"PRIu64" bytes\n", 3241 ifp->if_xname, ifp->if_mtu, 3242 sp->pp_saved_mtu); 3243 } 3244 3245 ifp->if_mtu = sp->pp_saved_mtu; 3246 sp->pp_saved_mtu = 0; 3247 IFNET_UNLOCK(ifp); 3248 } 3249 3250 /* 3251 * Take upper layers down. We send the Down event first and 3252 * the Close second to prevent the upper layers from sending 3253 * ``a flurry of terminate-request packets'', as the RFC 3254 * describes it. 3255 */ 3256 for (i = 0; i < IDX_COUNT; i++) { 3257 pi = (cps[i])->protoidx; 3258 if (((cps[i])->flags & CP_LCP) == 0) { 3259 /* skip if ncp was not started */ 3260 if (phase != SPPP_PHASE_NETWORK && 3261 ((cps[i])->flags & CP_NCP) != 0) 3262 continue; 3263 3264 sppp_wq_add(sp->wq_cp, &sp->scp[pi].work_down); 3265 sppp_wq_add(sp->wq_cp, &sp->scp[pi].work_close); 3266 } 3267 } 3268 } 3269 3270 static void 3271 sppp_lcp_tls(const struct cp *cp __unused, struct sppp *sp) 3272 { 3273 3274 KASSERT(SPPP_WLOCKED(sp)); 3275 3276 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 3277 printf("%s: authentication failed %d times, not retrying again\n", 3278 sp->pp_if.if_xname, sp->pp_auth_failures); 3279 3280 SPPP_UNLOCK(sp); 3281 if_down(&sp->pp_if); 3282 SPPP_LOCK(sp, RW_WRITER); 3283 return; 3284 } 3285 3286 sppp_change_phase(sp, SPPP_PHASE_ESTABLISH); 3287 3288 /* Notify lower layer if desired. */ 3289 sppp_notify_tls_wlocked(sp); 3290 sp->lcp.tlf_sent = false; 3291 } 3292 3293 static void 3294 sppp_lcp_tlf(const struct cp *cp __unused, struct sppp *sp) 3295 { 3296 3297 KASSERT(SPPP_WLOCKED(sp)); 3298 3299 sppp_change_phase(sp, SPPP_PHASE_DEAD); 3300 3301 /* Notify lower layer if desired. */ 3302 sppp_notify_tlf_wlocked(sp); 3303 3304 switch (sp->scp[IDX_LCP].state) { 3305 case STATE_CLOSED: 3306 case STATE_STOPPED: 3307 sp->lcp.tlf_sent = true; 3308 break; 3309 case STATE_INITIAL: 3310 default: 3311 /* just in case */ 3312 sp->lcp.tlf_sent = false; 3313 } 3314 } 3315 3316 static void 3317 sppp_lcp_scr(struct sppp *sp) 3318 { 3319 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 3320 int i = 0; 3321 u_short authproto; 3322 3323 KASSERT(SPPP_WLOCKED(sp)); 3324 3325 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC)) { 3326 if (! sp->lcp.magic) 3327 sp->lcp.magic = cprng_fast32(); 3328 opt[i++] = LCP_OPT_MAGIC; 3329 opt[i++] = 6; 3330 opt[i++] = sp->lcp.magic >> 24; 3331 opt[i++] = sp->lcp.magic >> 16; 3332 opt[i++] = sp->lcp.magic >> 8; 3333 opt[i++] = sp->lcp.magic; 3334 } 3335 3336 if (ISSET(sp->lcp.opts,SPPP_LCP_OPT_MRU)) { 3337 opt[i++] = LCP_OPT_MRU; 3338 opt[i++] = 4; 3339 opt[i++] = sp->lcp.mru >> 8; 3340 opt[i++] = sp->lcp.mru; 3341 } 3342 3343 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO)) { 3344 authproto = sp->hisauth.proto; 3345 opt[i++] = LCP_OPT_AUTH_PROTO; 3346 opt[i++] = authproto == PPP_CHAP? 5: 4; 3347 opt[i++] = authproto >> 8; 3348 opt[i++] = authproto; 3349 if (authproto == PPP_CHAP) 3350 opt[i++] = CHAP_MD5; 3351 } 3352 3353 sp->scp[IDX_LCP].confid = ++sp->scp[IDX_LCP].seq; 3354 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->scp[IDX_LCP].confid, i, &opt); 3355 } 3356 3357 /* 3358 * Check the open NCPs, return true if at least one NCP is open. 3359 */ 3360 3361 static int 3362 sppp_cp_check(struct sppp *sp, u_char cp_flags) 3363 { 3364 int i, mask; 3365 3366 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 3367 if ((sp->lcp.protos & mask) && (cps[i])->flags & cp_flags) 3368 return 1; 3369 return 0; 3370 } 3371 3372 /* 3373 * Re-check the open NCPs and see if we should terminate the link. 3374 * Called by the NCPs during their tlf action handling. 3375 */ 3376 static void 3377 sppp_lcp_check_and_close(struct sppp *sp) 3378 { 3379 3380 KASSERT(SPPP_WLOCKED(sp)); 3381 3382 if (sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 3383 /* don't bother, we are already going down */ 3384 return; 3385 } 3386 3387 if (sp->pp_phase == SPPP_PHASE_AUTHENTICATE && 3388 sppp_cp_check(sp, CP_AUTH)) 3389 return; 3390 3391 if (sp->pp_phase >= SPPP_PHASE_NETWORK && 3392 sppp_cp_check(sp, CP_NCP)) 3393 return; 3394 3395 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3396 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 3397 } 3398 3399 /* 3400 *--------------------------------------------------------------------------* 3401 * * 3402 * The IPCP implementation. * 3403 * * 3404 *--------------------------------------------------------------------------* 3405 */ 3406 3407 static void 3408 sppp_ipcp_init(struct sppp *sp) 3409 { 3410 3411 KASSERT(SPPP_WLOCKED(sp)); 3412 3413 sppp_cp_init(&ipcp, sp); 3414 3415 sp->ipcp.opts = 0; 3416 sp->ipcp.flags = 0; 3417 } 3418 3419 static void 3420 sppp_ipcp_open(struct sppp *sp, void *xcp) 3421 { 3422 STDDCL; 3423 uint32_t myaddr, hisaddr; 3424 3425 KASSERT(SPPP_WLOCKED(sp)); 3426 KASSERT(!cpu_softintr_p()); 3427 3428 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 3429 sp->ipcp.req_myaddr = 0; 3430 sp->ipcp.req_hisaddr = 0; 3431 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 3432 3433 #ifdef INET 3434 kpreempt_disable(); 3435 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3436 kpreempt_enable(); 3437 #else 3438 myaddr = hisaddr = 0; 3439 #endif 3440 /* 3441 * If we don't have his address, this probably means our 3442 * interface doesn't want to talk IP at all. (This could 3443 * be the case if somebody wants to speak only IPX, for 3444 * example.) Don't open IPCP in this case. 3445 */ 3446 if (hisaddr == 0) { 3447 /* XXX this message should go away */ 3448 if (debug) 3449 log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n", 3450 ifp->if_xname); 3451 return; 3452 } 3453 3454 if (myaddr == 0) { 3455 /* 3456 * I don't have an assigned address, so i need to 3457 * negotiate my address. 3458 */ 3459 sp->ipcp.flags |= IPCP_MYADDR_DYN; 3460 SET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3461 } 3462 if (hisaddr == 1) { 3463 /* 3464 * XXX - remove this hack! 3465 * remote has no valid address, we need to get one assigned. 3466 */ 3467 sp->ipcp.flags |= IPCP_HISADDR_DYN; 3468 } 3469 3470 if (sp->query_dns & 1) { 3471 SET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3472 } else { 3473 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3474 } 3475 3476 if (sp->query_dns & 2) { 3477 SET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3478 } else { 3479 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3480 } 3481 sppp_open_event(sp, xcp); 3482 } 3483 3484 static void 3485 sppp_ipcp_close(struct sppp *sp, void *xcp) 3486 { 3487 3488 KASSERT(SPPP_WLOCKED(sp)); 3489 KASSERT(!cpu_softintr_p()); 3490 3491 sppp_close_event(sp, xcp); 3492 3493 #ifdef INET 3494 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 3495 /* 3496 * Some address was dynamic, clear it again. 3497 */ 3498 sppp_clear_ip_addrs(sp); 3499 #endif 3500 } 3501 3502 /* 3503 * Analyze a configure request. Return true if it was agreeable, and 3504 * caused action sca, false if it has been rejected or nak'ed, and 3505 * caused action scn. (The return value is used to make the state 3506 * transition decision in the state automaton.) 3507 */ 3508 static enum cp_rcr_type 3509 sppp_ipcp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 3510 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 3511 { 3512 u_char *buf, *r, *p, l, blen; 3513 enum cp_rcr_type type; 3514 struct ifnet *ifp = &sp->pp_if; 3515 int rlen, len, debug = ifp->if_flags & IFF_DEBUG; 3516 uint32_t hisaddr, desiredaddr; 3517 3518 KASSERT(SPPP_WLOCKED(sp)); 3519 3520 type = CP_RCR_NONE; 3521 origlen -= sizeof(*h); 3522 3523 if (origlen < 0) 3524 return CP_RCR_DROP; 3525 3526 /* 3527 * Make sure to allocate a buf that can at least hold a 3528 * conf-nak with an `address' option. We might need it below. 3529 */ 3530 blen = MAX(6, origlen); 3531 3532 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 3533 if (buf == NULL) 3534 return CP_RCR_DROP; 3535 3536 /* pass 1: see if we can recognize them */ 3537 if (debug) 3538 log(LOG_DEBUG, "%s: ipcp parse opts:", 3539 ifp->if_xname); 3540 p = (void *)(h + 1); 3541 r = buf; 3542 rlen = 0; 3543 for (len = origlen; len > 1; len -= l, p += l) { 3544 l = p[1]; 3545 if (l == 0) 3546 break; 3547 3548 /* Sanity check option length */ 3549 if (l > len) { 3550 /* XXX should we just RXJ? */ 3551 addlog("%s: malicious IPCP option received, dropping\n", 3552 ifp->if_xname); 3553 type = CP_RCR_ERR; 3554 goto end; 3555 } 3556 if (debug) 3557 addlog(" %s", sppp_ipcp_opt_name(*p)); 3558 switch (p[0]) { 3559 #ifdef notyet 3560 case IPCP_OPT_COMPRESSION: 3561 if (len >= 6 && l >= 6) { 3562 /* correctly formed compress option */ 3563 continue; 3564 } 3565 if (debug) 3566 addlog(" [invalid]"); 3567 break; 3568 #endif 3569 case IPCP_OPT_ADDRESS: 3570 if (len >= 6 && l == 6) { 3571 /* correctly formed address option */ 3572 continue; 3573 } 3574 if (debug) 3575 addlog(" [invalid]"); 3576 break; 3577 default: 3578 /* Others not supported. */ 3579 if (debug) 3580 addlog(" [rej]"); 3581 break; 3582 } 3583 /* Add the option to rejected list. */ 3584 if (rlen + l > blen) { 3585 if (debug) 3586 addlog(" [overflow]"); 3587 continue; 3588 } 3589 memcpy(r, p, l); 3590 r += l; 3591 rlen += l; 3592 } 3593 3594 if (rlen > 0) { 3595 type = CP_RCR_REJ; 3596 goto end; 3597 } 3598 3599 if (debug) 3600 addlog("\n"); 3601 3602 /* pass 2: parse option values */ 3603 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 3604 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 3605 else 3606 #ifdef INET 3607 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 3608 #else 3609 hisaddr = 0; 3610 #endif 3611 if (debug) 3612 log(LOG_DEBUG, "%s: ipcp parse opt values: ", 3613 ifp->if_xname); 3614 p = (void *)(h + 1); 3615 r = buf; 3616 rlen = 0; 3617 for (len = origlen; len > 1; len -= l, p += l) { 3618 l = p[1]; 3619 if (l == 0) 3620 break; 3621 3622 if (debug) 3623 addlog(" %s", sppp_ipcp_opt_name(*p)); 3624 switch (p[0]) { 3625 #ifdef notyet 3626 case IPCP_OPT_COMPRESSION: 3627 continue; 3628 #endif 3629 case IPCP_OPT_ADDRESS: 3630 desiredaddr = p[2] << 24 | p[3] << 16 | 3631 p[4] << 8 | p[5]; 3632 if (desiredaddr == hisaddr || 3633 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 3634 /* 3635 * Peer's address is same as our value, 3636 * this is agreeable. Gonna conf-ack 3637 * it. 3638 */ 3639 if (debug) 3640 addlog(" %s [ack]", 3641 sppp_dotted_quad(hisaddr)); 3642 /* record that we've seen it already */ 3643 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 3644 sp->ipcp.req_hisaddr = desiredaddr; 3645 hisaddr = desiredaddr; 3646 continue; 3647 } 3648 /* 3649 * The address wasn't agreeable. This is either 3650 * he sent us 0.0.0.0, asking to assign him an 3651 * address, or he send us another address not 3652 * matching our value. Either case, we gonna 3653 * conf-nak it with our value. 3654 */ 3655 if (debug) { 3656 if (desiredaddr == 0) 3657 addlog(" [addr requested]"); 3658 else 3659 addlog(" %s [not agreed]", 3660 sppp_dotted_quad(desiredaddr)); 3661 } 3662 3663 p[2] = hisaddr >> 24; 3664 p[3] = hisaddr >> 16; 3665 p[4] = hisaddr >> 8; 3666 p[5] = hisaddr; 3667 break; 3668 } 3669 if (rlen + l > blen) { 3670 if (debug) 3671 addlog(" [overflow]"); 3672 continue; 3673 } 3674 /* Add the option to nak'ed list. */ 3675 memcpy(r, p, l); 3676 r += l; 3677 rlen += l; 3678 } 3679 3680 if (rlen > 0) { 3681 type = CP_RCR_NAK; 3682 } else { 3683 if ((sp->ipcp.flags & IPCP_HISADDR_SEEN) == 0) { 3684 /* 3685 * If we are about to conf-ack the request, but haven't seen 3686 * his address so far, gonna conf-nak it instead, with the 3687 * `address' option present and our idea of his address being 3688 * filled in there, to request negotiation of both addresses. 3689 * 3690 * XXX This can result in an endless req - nak loop if peer 3691 * doesn't want to send us his address. Q: What should we do 3692 * about it? XXX A: implement the max-failure counter. 3693 */ 3694 buf[0] = IPCP_OPT_ADDRESS; 3695 buf[1] = 6; 3696 buf[2] = hisaddr >> 24; 3697 buf[3] = hisaddr >> 16; 3698 buf[4] = hisaddr >> 8; 3699 buf[5] = hisaddr; 3700 rlen = 6; 3701 if (debug) 3702 addlog(" still need hisaddr"); 3703 type = CP_RCR_NAK; 3704 } else { 3705 type = CP_RCR_ACK; 3706 rlen = origlen; 3707 memcpy(r, h + 1, rlen); 3708 } 3709 } 3710 3711 end: 3712 if (debug) 3713 addlog("\n"); 3714 3715 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 3716 if (buf != NULL) 3717 kmem_intr_free(buf, blen); 3718 } else { 3719 *msgbuf = buf; 3720 *buflen = blen; 3721 *msglen = rlen; 3722 } 3723 3724 return type; 3725 } 3726 3727 /* 3728 * Analyze the IPCP Configure-Reject option list, and adjust our 3729 * negotiation. 3730 */ 3731 static void 3732 sppp_ipcp_confrej(struct sppp *sp, struct lcp_header *h, int len) 3733 { 3734 u_char *p, l; 3735 struct ifnet *ifp = &sp->pp_if; 3736 int debug = ifp->if_flags & IFF_DEBUG; 3737 3738 KASSERT(SPPP_WLOCKED(sp)); 3739 3740 if (len <= sizeof(*h)) 3741 return; 3742 3743 len -= sizeof(*h); 3744 3745 if (debug) 3746 log(LOG_DEBUG, "%s: ipcp rej opts:", 3747 ifp->if_xname); 3748 3749 p = (void *)(h + 1); 3750 for (; len > 1; len -= l, p += l) { 3751 l = p[1]; 3752 if (l == 0) 3753 break; 3754 3755 /* Sanity check option length */ 3756 if (l > len) { 3757 /* XXX should we just RXJ? */ 3758 addlog("%s: malicious IPCP option received, dropping\n", 3759 ifp->if_xname); 3760 goto end; 3761 } 3762 if (debug) 3763 addlog(" %s", sppp_ipcp_opt_name(*p)); 3764 switch (p[0]) { 3765 case IPCP_OPT_ADDRESS: 3766 /* 3767 * Peer doesn't grok address option. This is 3768 * bad. XXX Should we better give up here? 3769 */ 3770 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3771 break; 3772 #ifdef notyet 3773 case IPCP_OPT_COMPRESS: 3774 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_COMPRESS); 3775 break; 3776 #endif 3777 case IPCP_OPT_PRIMDNS: 3778 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3779 break; 3780 3781 case IPCP_OPT_SECDNS: 3782 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3783 break; 3784 } 3785 } 3786 if (debug) 3787 addlog("\n"); 3788 end: 3789 return; 3790 } 3791 3792 /* 3793 * Analyze the IPCP Configure-NAK option list, and adjust our 3794 * negotiation. 3795 */ 3796 static void 3797 sppp_ipcp_confnak(struct sppp *sp, struct lcp_header *h, int len) 3798 { 3799 u_char *p, l; 3800 struct ifnet *ifp = &sp->pp_if; 3801 int debug = ifp->if_flags & IFF_DEBUG; 3802 uint32_t wantaddr; 3803 3804 KASSERT(SPPP_WLOCKED(sp)); 3805 3806 len -= sizeof(*h); 3807 3808 if (debug) 3809 log(LOG_DEBUG, "%s: ipcp nak opts:", 3810 ifp->if_xname); 3811 3812 p = (void *)(h + 1); 3813 for (; len > 1; len -= l, p += l) { 3814 l = p[1]; 3815 if (l == 0) 3816 break; 3817 3818 /* Sanity check option length */ 3819 if (l > len) { 3820 /* XXX should we just RXJ? */ 3821 addlog("%s: malicious IPCP option received, dropping\n", 3822 ifp->if_xname); 3823 return; 3824 } 3825 if (debug) 3826 addlog(" %s", sppp_ipcp_opt_name(*p)); 3827 switch (*p) { 3828 case IPCP_OPT_ADDRESS: 3829 /* 3830 * Peer doesn't like our local IP address. See 3831 * if we can do something for him. We'll drop 3832 * him our address then. 3833 */ 3834 if (len >= 6 && l == 6) { 3835 wantaddr = p[2] << 24 | p[3] << 16 | 3836 p[4] << 8 | p[5]; 3837 SET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3838 if (debug) 3839 addlog(" [wantaddr %s]", 3840 sppp_dotted_quad(wantaddr)); 3841 /* 3842 * When doing dynamic address assignment, 3843 * we accept his offer. Otherwise, we 3844 * ignore it and thus continue to negotiate 3845 * our already existing value. 3846 */ 3847 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3848 if (ntohl(wantaddr) != INADDR_ANY) { 3849 if (debug) 3850 addlog(" [agree]"); 3851 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3852 sp->ipcp.req_myaddr = wantaddr; 3853 } else { 3854 if (debug) 3855 addlog(" [not agreed]"); 3856 } 3857 } 3858 } 3859 break; 3860 3861 case IPCP_OPT_PRIMDNS: 3862 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS) && 3863 len >= 6 && l == 6) { 3864 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3865 p[4] << 8 | p[5]; 3866 } 3867 break; 3868 3869 case IPCP_OPT_SECDNS: 3870 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS) && 3871 len >= 6 && l == 6) { 3872 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3873 p[4] << 8 | p[5]; 3874 } 3875 break; 3876 #ifdef notyet 3877 case IPCP_OPT_COMPRESS: 3878 /* 3879 * Peer wants different compression parameters. 3880 */ 3881 break; 3882 #endif 3883 } 3884 } 3885 if (debug) 3886 addlog("\n"); 3887 } 3888 3889 static void 3890 sppp_ipcp_tlu(struct sppp *sp) 3891 { 3892 #ifdef INET 3893 struct ifnet *ifp; 3894 3895 ifp = &sp->pp_if; 3896 KASSERT(SPPP_WLOCKED(sp)); 3897 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && 3898 ((sp->ipcp.flags & IPCP_MYADDR_SEEN) == 0)) { 3899 log(LOG_WARNING, "%s: no IP address, closing IPCP\n", 3900 ifp->if_xname); 3901 sppp_wq_add(sp->wq_cp, 3902 &sp->scp[IDX_IPCP].work_close); 3903 } else { 3904 /* we are up. Set addresses and notify anyone interested */ 3905 sppp_set_ip_addrs(sp); 3906 } 3907 #endif 3908 } 3909 3910 static void 3911 sppp_ipcp_scr(struct sppp *sp) 3912 { 3913 uint8_t opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3914 #ifdef INET 3915 uint32_t ouraddr; 3916 #endif 3917 int i = 0; 3918 3919 KASSERT(SPPP_WLOCKED(sp)); 3920 3921 #ifdef notyet 3922 if (ISSET(sp->ipcp.opts,SPPP_IPCP_OPT_COMPRESSION)) { 3923 opt[i++] = IPCP_OPT_COMPRESSION; 3924 opt[i++] = 6; 3925 opt[i++] = 0; /* VJ header compression */ 3926 opt[i++] = 0x2d; /* VJ header compression */ 3927 opt[i++] = max_slot_id; 3928 opt[i++] = comp_slot_id; 3929 } 3930 #endif 3931 3932 #ifdef INET 3933 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS)) { 3934 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) { 3935 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3936 } else { 3937 kpreempt_disable(); 3938 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3939 kpreempt_enable(); 3940 } 3941 opt[i++] = IPCP_OPT_ADDRESS; 3942 opt[i++] = 6; 3943 opt[i++] = ouraddr >> 24; 3944 opt[i++] = ouraddr >> 16; 3945 opt[i++] = ouraddr >> 8; 3946 opt[i++] = ouraddr; 3947 } 3948 #endif 3949 3950 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS)) { 3951 opt[i++] = IPCP_OPT_PRIMDNS; 3952 opt[i++] = 6; 3953 opt[i++] = sp->dns_addrs[0] >> 24; 3954 opt[i++] = sp->dns_addrs[0] >> 16; 3955 opt[i++] = sp->dns_addrs[0] >> 8; 3956 opt[i++] = sp->dns_addrs[0]; 3957 } 3958 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS)) { 3959 opt[i++] = IPCP_OPT_SECDNS; 3960 opt[i++] = 6; 3961 opt[i++] = sp->dns_addrs[1] >> 24; 3962 opt[i++] = sp->dns_addrs[1] >> 16; 3963 opt[i++] = sp->dns_addrs[1] >> 8; 3964 opt[i++] = sp->dns_addrs[1]; 3965 } 3966 3967 sp->scp[IDX_IPCP].confid = ++sp->scp[IDX_IPCP].seq; 3968 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->scp[IDX_IPCP].confid, i, &opt); 3969 } 3970 3971 /* 3972 *--------------------------------------------------------------------------* 3973 * * 3974 * The IPv6CP implementation. * 3975 * * 3976 *--------------------------------------------------------------------------* 3977 */ 3978 3979 #ifdef INET6 3980 static void 3981 sppp_ipv6cp_init(struct sppp *sp) 3982 { 3983 3984 KASSERT(SPPP_WLOCKED(sp)); 3985 3986 sppp_cp_init(&ipv6cp, sp); 3987 3988 sp->ipv6cp.opts = 0; 3989 sp->ipv6cp.flags = 0; 3990 } 3991 3992 static void 3993 sppp_ipv6cp_open(struct sppp *sp, void *xcp) 3994 { 3995 STDDCL; 3996 struct in6_addr myaddr, hisaddr; 3997 3998 KASSERT(SPPP_WLOCKED(sp)); 3999 KASSERT(!cpu_softintr_p()); 4000 4001 #ifdef IPV6CP_MYIFID_DYN 4002 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 4003 #else 4004 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 4005 #endif 4006 4007 kpreempt_disable(); 4008 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 4009 kpreempt_enable(); 4010 /* 4011 * If we don't have our address, this probably means our 4012 * interface doesn't want to talk IPv6 at all. (This could 4013 * be the case if somebody wants to speak only IPX, for 4014 * example.) Don't open IPv6CP in this case. 4015 */ 4016 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 4017 /* XXX this message should go away */ 4018 if (debug) 4019 log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n", 4020 ifp->if_xname); 4021 return; 4022 } 4023 4024 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 4025 SET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 4026 sppp_open_event(sp, xcp); 4027 } 4028 4029 /* 4030 * Analyze a configure request. Return true if it was agreeable, and 4031 * caused action sca, false if it has been rejected or nak'ed, and 4032 * caused action scn. (The return value is used to make the state 4033 * transition decision in the state automaton.) 4034 */ 4035 static enum cp_rcr_type 4036 sppp_ipv6cp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 4037 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 4038 { 4039 u_char *buf, *r, *p, l, blen; 4040 struct ifnet *ifp = &sp->pp_if; 4041 int rlen, len, debug = ifp->if_flags & IFF_DEBUG; 4042 struct in6_addr myaddr, desiredaddr, suggestaddr; 4043 enum cp_rcr_type type; 4044 int ifidcount; 4045 int collision, nohisaddr; 4046 char ip6buf[INET6_ADDRSTRLEN]; 4047 4048 KASSERT(SPPP_WLOCKED(sp)); 4049 4050 type = CP_RCR_NONE; 4051 origlen -= sizeof(*h); 4052 4053 if (origlen < 0) 4054 return CP_RCR_DROP; 4055 4056 /* 4057 * Make sure to allocate a buf that can at least hold a 4058 * conf-nak with an `address' option. We might need it below. 4059 */ 4060 blen = MAX(6, origlen); 4061 4062 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 4063 if (buf == NULL) 4064 return CP_RCR_DROP; 4065 4066 /* pass 1: see if we can recognize them */ 4067 if (debug) 4068 log(LOG_DEBUG, "%s: ipv6cp parse opts:", 4069 ifp->if_xname); 4070 p = (void *)(h + 1); 4071 r = buf; 4072 rlen = 0; 4073 ifidcount = 0; 4074 for (len = origlen; len > 1; len -= l, p += l) { 4075 l = p[1]; 4076 if (l == 0) 4077 break; 4078 4079 /* Sanity check option length */ 4080 if (l > len) { 4081 /* XXX just RXJ? */ 4082 addlog("%s: received malicious IPCPv6 option, " 4083 "dropping\n", ifp->if_xname); 4084 type = CP_RCR_ERR; 4085 goto end; 4086 } 4087 if (debug) 4088 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4089 switch (p[0]) { 4090 case IPV6CP_OPT_IFID: 4091 if (len >= 10 && l == 10 && ifidcount == 0) { 4092 /* correctly formed address option */ 4093 ifidcount++; 4094 continue; 4095 } 4096 if (debug) 4097 addlog(" [invalid]"); 4098 break; 4099 #ifdef notyet 4100 case IPV6CP_OPT_COMPRESSION: 4101 if (len >= 4 && l >= 4) { 4102 /* correctly formed compress option */ 4103 continue; 4104 } 4105 if (debug) 4106 addlog(" [invalid]"); 4107 break; 4108 #endif 4109 default: 4110 /* Others not supported. */ 4111 if (debug) 4112 addlog(" [rej]"); 4113 break; 4114 } 4115 if (rlen + l > blen) { 4116 if (debug) 4117 addlog(" [overflow]"); 4118 continue; 4119 } 4120 /* Add the option to rejected list. */ 4121 memcpy(r, p, l); 4122 r += l; 4123 rlen += l; 4124 } 4125 4126 if (rlen > 0) { 4127 type = CP_RCR_REJ; 4128 goto end; 4129 } 4130 4131 if (debug) 4132 addlog("\n"); 4133 4134 /* pass 2: parse option values */ 4135 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4136 if (debug) 4137 log(LOG_DEBUG, "%s: ipv6cp parse opt values: ", 4138 ifp->if_xname); 4139 p = (void *)(h + 1); 4140 r = buf; 4141 rlen = 0; 4142 type = CP_RCR_ACK; 4143 for (len = origlen; len > 1; len -= l, p += l) { 4144 l = p[1]; 4145 if (l == 0) 4146 break; 4147 4148 if (debug) 4149 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4150 switch (p[0]) { 4151 #ifdef notyet 4152 case IPV6CP_OPT_COMPRESSION: 4153 continue; 4154 #endif 4155 case IPV6CP_OPT_IFID: 4156 memset(&desiredaddr, 0, sizeof(desiredaddr)); 4157 memcpy(&desiredaddr.s6_addr[8], &p[2], 8); 4158 collision = (memcmp(&desiredaddr.s6_addr[8], 4159 &myaddr.s6_addr[8], 8) == 0); 4160 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 4161 4162 desiredaddr.s6_addr16[0] = htons(0xfe80); 4163 (void)in6_setscope(&desiredaddr, &sp->pp_if, NULL); 4164 4165 if (!collision && !nohisaddr) { 4166 /* no collision, hisaddr known - Conf-Ack */ 4167 type = CP_RCR_ACK; 4168 memcpy(sp->ipv6cp.my_ifid, &myaddr.s6_addr[8], 4169 sizeof(sp->ipv6cp.my_ifid)); 4170 memcpy(sp->ipv6cp.his_ifid, 4171 &desiredaddr.s6_addr[8], 4172 sizeof(sp->ipv6cp.my_ifid)); 4173 4174 if (debug) { 4175 addlog(" %s [%s]", 4176 IN6_PRINT(ip6buf, &desiredaddr), 4177 sppp_cp_type_name(CONF_ACK)); 4178 } 4179 continue; 4180 } 4181 4182 memset(&suggestaddr, 0, sizeof(suggestaddr)); 4183 if (collision && nohisaddr) { 4184 /* collision, hisaddr unknown - Conf-Rej */ 4185 type = CP_RCR_REJ; 4186 memset(&p[2], 0, 8); 4187 } else { 4188 /* 4189 * - no collision, hisaddr unknown, or 4190 * - collision, hisaddr known 4191 * Conf-Nak, suggest hisaddr 4192 */ 4193 type = CP_RCR_NAK; 4194 sppp_suggest_ip6_addr(sp, &suggestaddr); 4195 memcpy(&p[2], &suggestaddr.s6_addr[8], 8); 4196 } 4197 if (debug) { 4198 int ctype = type == CP_RCR_REJ ? CONF_REJ : CONF_NAK; 4199 addlog(" %s [%s]", IN6_PRINT(ip6buf, &desiredaddr), 4200 sppp_cp_type_name(ctype)); 4201 } 4202 break; 4203 } 4204 if (rlen + l > blen) { 4205 if (debug) 4206 addlog(" [overflow]"); 4207 continue; 4208 } 4209 /* Add the option to nak'ed list. */ 4210 memcpy(r, p, l); 4211 r += l; 4212 rlen += l; 4213 } 4214 4215 if (rlen > 0) { 4216 if (type != CP_RCR_ACK) { 4217 if (debug) { 4218 int ctype ; 4219 ctype = type == CP_RCR_REJ ? 4220 CONF_REJ : CONF_NAK; 4221 addlog(" send %s suggest %s\n", 4222 sppp_cp_type_name(ctype), 4223 IN6_PRINT(ip6buf, &suggestaddr)); 4224 } 4225 } 4226 #ifdef notdef 4227 if (type == CP_RCR_ACK) 4228 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 4229 #endif 4230 } else { 4231 if (type == CP_RCR_ACK) { 4232 rlen = origlen; 4233 memcpy(r, h + 1, rlen); 4234 } 4235 } 4236 end: 4237 if (debug) 4238 addlog("\n"); 4239 4240 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 4241 if (buf != NULL) 4242 kmem_intr_free(buf, blen); 4243 } else { 4244 *msgbuf = buf; 4245 *buflen = blen; 4246 *msglen = rlen; 4247 } 4248 4249 return type; 4250 } 4251 4252 /* 4253 * Analyze the IPv6CP Configure-Reject option list, and adjust our 4254 * negotiation. 4255 */ 4256 static void 4257 sppp_ipv6cp_confrej(struct sppp *sp, struct lcp_header *h, int len) 4258 { 4259 u_char *p, l; 4260 struct ifnet *ifp = &sp->pp_if; 4261 int debug = ifp->if_flags & IFF_DEBUG; 4262 4263 KASSERT(SPPP_WLOCKED(sp)); 4264 4265 if (len <= sizeof(*h)) 4266 return; 4267 4268 len -= sizeof(*h); 4269 4270 if (debug) 4271 log(LOG_DEBUG, "%s: ipv6cp rej opts:", 4272 ifp->if_xname); 4273 4274 p = (void *)(h + 1); 4275 for (; len > 1; len -= l, p += l) { 4276 l = p[1]; 4277 if (l == 0) 4278 break; 4279 4280 if (l > len) { 4281 /* XXX just RXJ? */ 4282 addlog("%s: received malicious IPCPv6 option, " 4283 "dropping\n", ifp->if_xname); 4284 goto end; 4285 } 4286 if (debug) 4287 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4288 switch (p[0]) { 4289 case IPV6CP_OPT_IFID: 4290 /* 4291 * Peer doesn't grok address option. This is 4292 * bad. XXX Should we better give up here? 4293 */ 4294 CLR(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 4295 break; 4296 #ifdef notyet 4297 case IPV6CP_OPT_COMPRESS: 4298 CLR(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_COMPRESS); 4299 break; 4300 #endif 4301 } 4302 } 4303 if (debug) 4304 addlog("\n"); 4305 end: 4306 return; 4307 } 4308 4309 /* 4310 * Analyze the IPv6CP Configure-NAK option list, and adjust our 4311 * negotiation. 4312 */ 4313 static void 4314 sppp_ipv6cp_confnak(struct sppp *sp, struct lcp_header *h, int len) 4315 { 4316 u_char *p, l; 4317 struct ifnet *ifp = &sp->pp_if; 4318 int debug = ifp->if_flags & IFF_DEBUG; 4319 struct in6_addr suggestaddr; 4320 char ip6buf[INET6_ADDRSTRLEN]; 4321 4322 KASSERT(SPPP_WLOCKED(sp)); 4323 4324 if (len <= sizeof(*h)) 4325 return; 4326 4327 len -= sizeof(*h); 4328 4329 if (debug) 4330 log(LOG_DEBUG, "%s: ipv6cp nak opts:", 4331 ifp->if_xname); 4332 4333 p = (void *)(h + 1); 4334 for (; len > 1; len -= l, p += l) { 4335 l = p[1]; 4336 if (l == 0) 4337 break; 4338 4339 if (l > len) { 4340 /* XXX just RXJ? */ 4341 addlog("%s: received malicious IPCPv6 option, " 4342 "dropping\n", ifp->if_xname); 4343 goto end; 4344 } 4345 if (debug) 4346 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4347 switch (p[0]) { 4348 case IPV6CP_OPT_IFID: 4349 /* 4350 * Peer doesn't like our local ifid. See 4351 * if we can do something for him. We'll drop 4352 * him our address then. 4353 */ 4354 if (len < 10 || l != 10) 4355 break; 4356 memset(&suggestaddr, 0, sizeof(suggestaddr)); 4357 suggestaddr.s6_addr16[0] = htons(0xfe80); 4358 (void)in6_setscope(&suggestaddr, &sp->pp_if, NULL); 4359 memcpy(&suggestaddr.s6_addr[8], &p[2], 8); 4360 4361 SET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 4362 if (debug) 4363 addlog(" [suggestaddr %s]", 4364 IN6_PRINT(ip6buf, &suggestaddr)); 4365 #ifdef IPV6CP_MYIFID_DYN 4366 /* 4367 * When doing dynamic address assignment, 4368 * we accept his offer. 4369 */ 4370 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 4371 struct in6_addr lastsuggest; 4372 /* 4373 * If <suggested myaddr from peer> equals to 4374 * <hisaddr we have suggested last time>, 4375 * we have a collision. generate new random 4376 * ifid. 4377 */ 4378 sppp_suggest_ip6_addr(&lastsuggest); 4379 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 4380 lastsuggest)) { 4381 if (debug) 4382 addlog(" [random]"); 4383 sppp_gen_ip6_addr(sp, &suggestaddr); 4384 } 4385 sppp_set_ip6_addr(sp, &suggestaddr, 0); 4386 if (debug) 4387 addlog(" [agree]"); 4388 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 4389 } 4390 #else 4391 /* 4392 * Since we do not do dynamic address assignment, 4393 * we ignore it and thus continue to negotiate 4394 * our already existing value. This can possibly 4395 * go into infinite request-reject loop. 4396 * 4397 * This is not likely because we normally use 4398 * ifid based on MAC-address. 4399 * If you have no ethernet card on the node, too bad. 4400 * XXX should we use fail_counter? 4401 */ 4402 #endif 4403 break; 4404 #ifdef notyet 4405 case IPV6CP_OPT_COMPRESS: 4406 /* 4407 * Peer wants different compression parameters. 4408 */ 4409 break; 4410 #endif 4411 } 4412 } 4413 if (debug) 4414 addlog("\n"); 4415 end: 4416 return; 4417 } 4418 4419 static void 4420 sppp_ipv6cp_tlu(struct sppp *sp) 4421 { 4422 4423 KASSERT(SPPP_WLOCKED(sp)); 4424 /* we are up - notify isdn daemon */ 4425 sppp_notify_con_wlocked(sp); 4426 } 4427 4428 static void 4429 sppp_ipv6cp_scr(struct sppp *sp) 4430 { 4431 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 4432 struct in6_addr ouraddr; 4433 int i = 0; 4434 4435 KASSERT(SPPP_WLOCKED(sp)); 4436 4437 if (ISSET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID)) { 4438 kpreempt_disable(); 4439 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 4440 kpreempt_enable(); 4441 4442 opt[i++] = IPV6CP_OPT_IFID; 4443 opt[i++] = 10; 4444 memcpy(&opt[i], &ouraddr.s6_addr[8], 8); 4445 i += 8; 4446 } 4447 4448 #ifdef notyet 4449 if (ISSET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_COMPRESSION)) { 4450 opt[i++] = IPV6CP_OPT_COMPRESSION; 4451 opt[i++] = 4; 4452 opt[i++] = 0; /* TBD */ 4453 opt[i++] = 0; /* TBD */ 4454 /* variable length data may follow */ 4455 } 4456 #endif 4457 4458 sp->scp[IDX_IPV6CP].confid = ++sp->scp[IDX_IPV6CP].seq; 4459 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->scp[IDX_IPV6CP].confid, i, &opt); 4460 } 4461 #else /*INET6*/ 4462 static void 4463 sppp_ipv6cp_init(struct sppp *sp) 4464 { 4465 4466 KASSERT(SPPP_WLOCKED(sp)); 4467 } 4468 4469 static void 4470 sppp_ipv6cp_open(struct sppp *sp, void *xcp) 4471 { 4472 4473 KASSERT(SPPP_WLOCKED(sp)); 4474 } 4475 4476 static enum cp_rcr_type 4477 sppp_ipv6cp_confreq(struct sppp *sp, struct lcp_header *h, 4478 int len, uint8_t **msgbuf, size_t *buflen, size_t *msglen) 4479 { 4480 4481 KASSERT(SPPP_WLOCKED(sp)); 4482 return 0; 4483 } 4484 4485 static void 4486 sppp_ipv6cp_confrej(struct sppp *sp, struct lcp_header *h, 4487 int len) 4488 { 4489 4490 KASSERT(SPPP_WLOCKED(sp)); 4491 } 4492 4493 static void 4494 sppp_ipv6cp_confnak(struct sppp *sp, struct lcp_header *h, 4495 int len) 4496 { 4497 4498 KASSERT(SPPP_WLOCKED(sp)); 4499 } 4500 4501 static void 4502 sppp_ipv6cp_tlu(struct sppp *sp) 4503 { 4504 4505 KASSERT(SPPP_WLOCKED(sp)); 4506 } 4507 4508 static void 4509 sppp_ipv6cp_scr(struct sppp *sp) 4510 { 4511 4512 KASSERT(SPPP_WLOCKED(sp)); 4513 } 4514 #endif /*INET6*/ 4515 4516 /* 4517 *--------------------------------------------------------------------------* 4518 * * 4519 * The CHAP implementation. * 4520 * * 4521 *--------------------------------------------------------------------------* 4522 */ 4523 /* 4524 * The authentication protocols is implemented on the state machine for 4525 * control protocols. And it uses following actions and events. 4526 * 4527 * Actions: 4528 * - scr: send CHAP_CHALLENGE and CHAP_RESPONSE 4529 * - sca: send CHAP_SUCCESS 4530 * - scn: send CHAP_FAILURE and shutdown lcp 4531 * Events: 4532 * - RCR+: receive CHAP_RESPONSE containing correct digest 4533 * - RCR-: receive CHAP_RESPONSE containing wrong digest 4534 * - RCA: receive CHAP_SUCCESS 4535 * - RCN: (this event is unused) 4536 * - TO+: re-send CHAP_CHALLENGE and CHAP_RESPONSE 4537 * - TO-: this layer finish 4538 */ 4539 4540 /* 4541 * Handle incoming CHAP packets. 4542 */ 4543 void 4544 sppp_chap_input(struct sppp *sp, struct mbuf *m) 4545 { 4546 STDDCL; 4547 struct lcp_header *h; 4548 int len, x; 4549 u_char *value, *name, digest[sizeof(sp->chap.challenge)]; 4550 int value_len, name_len; 4551 MD5_CTX ctx; 4552 4553 len = m->m_pkthdr.len; 4554 if (len < 4) { 4555 if (debug) 4556 log(LOG_DEBUG, 4557 "%s: chap invalid packet length: %d bytes\n", 4558 ifp->if_xname, len); 4559 return; 4560 } 4561 h = mtod(m, struct lcp_header *); 4562 if (len > ntohs(h->len)) 4563 len = ntohs(h->len); 4564 4565 SPPP_LOCK(sp, RW_WRITER); 4566 4567 switch (h->type) { 4568 /* challenge, failure and success are his authproto */ 4569 case CHAP_CHALLENGE: 4570 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4571 /* can't do anything useful */ 4572 sp->pp_auth_failures++; 4573 printf("%s: chap input without my name and my secret being set\n", 4574 ifp->if_xname); 4575 break; 4576 } 4577 value = 1 + (u_char *)(h + 1); 4578 value_len = value[-1]; 4579 name = value + value_len; 4580 name_len = len - value_len - 5; 4581 if (name_len < 0) { 4582 if (debug) { 4583 log(LOG_DEBUG, 4584 "%s: chap corrupted challenge " 4585 "<%s id=0x%x len=%d", 4586 ifp->if_xname, 4587 sppp_auth_type_name(PPP_CHAP, h->type), 4588 h->ident, ntohs(h->len)); 4589 if (len > 4) 4590 sppp_print_bytes((u_char *)(h + 1), 4591 len - 4); 4592 addlog(">\n"); 4593 } 4594 break; 4595 } 4596 4597 if (debug) { 4598 log(LOG_DEBUG, 4599 "%s: chap input <%s id=0x%x len=%d name=", 4600 ifp->if_xname, 4601 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 4602 ntohs(h->len)); 4603 sppp_print_string((char *) name, name_len); 4604 addlog(" value-size=%d value=", value_len); 4605 sppp_print_bytes(value, value_len); 4606 addlog(">\n"); 4607 } 4608 4609 /* Compute reply value. */ 4610 MD5Init(&ctx); 4611 MD5Update(&ctx, &h->ident, 1); 4612 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 4613 MD5Update(&ctx, value, value_len); 4614 MD5Final(sp->chap.digest, &ctx); 4615 sp->chap.digest_len = sizeof(sp->chap.digest); 4616 sp->scp[IDX_CHAP].rconfid = h->ident; 4617 4618 sppp_wq_add(sp->wq_cp, &sp->chap.work_challenge_rcvd); 4619 break; 4620 4621 case CHAP_SUCCESS: 4622 if (debug) { 4623 log(LOG_DEBUG, "%s: chap success", 4624 ifp->if_xname); 4625 if (len > 4) { 4626 addlog(": "); 4627 sppp_print_string((char *)(h + 1), len - 4); 4628 } 4629 addlog("\n"); 4630 } 4631 4632 if (h->ident != sp->scp[IDX_CHAP].rconfid) { 4633 if (debug) { 4634 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4635 ifp->if_xname, chap.name, 4636 h->ident, sp->scp[IDX_CHAP].rconfid); 4637 } 4638 if_statinc(ifp, if_ierrors); 4639 break; 4640 } 4641 4642 if (sp->chap.digest_len == 0) { 4643 if (debug) { 4644 log(LOG_DEBUG, 4645 "%s: receive CHAP success without challenge\n", 4646 ifp->if_xname); 4647 } 4648 if_statinc(ifp, if_ierrors); 4649 break; 4650 } 4651 4652 x = splnet(); 4653 sp->pp_auth_failures = 0; 4654 sp->pp_flags &= ~PP_NEEDAUTH; 4655 splx(x); 4656 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4657 sp->chap.digest_len = 0; 4658 4659 if (!ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_SERV)) { 4660 /* 4661 * we are not authenticator for CHAP, 4662 * generate a dummy RCR+ event without CHAP_RESPONSE 4663 */ 4664 sp->scp[IDX_CHAP].rcr_type = CP_RCR_ACK; 4665 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4666 } 4667 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rca); 4668 break; 4669 4670 case CHAP_FAILURE: 4671 if (h->ident != sp->scp[IDX_CHAP].rconfid) { 4672 if (debug) { 4673 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4674 ifp->if_xname, chap.name, 4675 h->ident, sp->scp[IDX_CHAP].rconfid); 4676 } 4677 if_statinc(ifp, if_ierrors); 4678 break; 4679 } 4680 4681 if (sp->chap.digest_len == 0) { 4682 if (debug) { 4683 log(LOG_DEBUG, 4684 "%s: receive CHAP failure without challenge\n", 4685 ifp->if_xname); 4686 } 4687 if_statinc(ifp, if_ierrors); 4688 break; 4689 } 4690 4691 x = splnet(); 4692 sp->pp_auth_failures++; 4693 splx(x); 4694 if (debug) { 4695 log(LOG_INFO, "%s: chap failure", 4696 ifp->if_xname); 4697 if (len > 4) { 4698 addlog(": "); 4699 sppp_print_string((char *)(h + 1), len - 4); 4700 } 4701 addlog("\n"); 4702 } else 4703 log(LOG_INFO, "%s: chap failure\n", 4704 ifp->if_xname); 4705 4706 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4707 sp->chap.digest_len = 0; 4708 /* 4709 * await LCP shutdown by authenticator, 4710 * so we don't have to enqueue sc->scp[IDX_CHAP].work_rcn 4711 */ 4712 break; 4713 4714 /* response is my authproto */ 4715 case CHAP_RESPONSE: 4716 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4717 /* can't do anything useful */ 4718 printf("%s: chap response" 4719 " without his name and his secret being set\n", 4720 ifp->if_xname); 4721 break; 4722 } 4723 value = 1 + (u_char *)(h + 1); 4724 value_len = value[-1]; 4725 name = value + value_len; 4726 name_len = len - value_len - 5; 4727 if (name_len < 0) { 4728 if (debug) { 4729 log(LOG_DEBUG, 4730 "%s: chap corrupted response " 4731 "<%s id=0x%x len=%d", 4732 ifp->if_xname, 4733 sppp_auth_type_name(PPP_CHAP, h->type), 4734 h->ident, ntohs(h->len)); 4735 if (len > 4) 4736 sppp_print_bytes((u_char *)(h + 1), 4737 len - 4); 4738 addlog(">\n"); 4739 } 4740 break; 4741 } 4742 if (h->ident != sp->scp[IDX_CHAP].confid) { 4743 if (debug) 4744 log(LOG_DEBUG, 4745 "%s: chap dropping response for old ID " 4746 "(got %d, expected %d)\n", 4747 ifp->if_xname, 4748 h->ident, sp->scp[IDX_CHAP].confid); 4749 break; 4750 } else { 4751 sp->scp[IDX_CHAP].rconfid = h->ident; 4752 } 4753 4754 if (sp->hisauth.name != NULL && 4755 (name_len != sp->hisauth.name_len 4756 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 4757 log(LOG_INFO, "%s: chap response, his name ", 4758 ifp->if_xname); 4759 sppp_print_string(name, name_len); 4760 addlog(" != expected "); 4761 sppp_print_string(sp->hisauth.name, 4762 sp->hisauth.name_len); 4763 addlog("\n"); 4764 4765 /* generate RCR- event */ 4766 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4767 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4768 break; 4769 } 4770 4771 if (debug) { 4772 log(LOG_DEBUG, "%s: chap input(%s) " 4773 "<%s id=0x%x len=%d name=", 4774 ifp->if_xname, 4775 sppp_state_name(sp->scp[IDX_CHAP].state), 4776 sppp_auth_type_name(PPP_CHAP, h->type), 4777 h->ident, ntohs(h->len)); 4778 sppp_print_string((char *)name, name_len); 4779 addlog(" value-size=%d value=", value_len); 4780 sppp_print_bytes(value, value_len); 4781 addlog(">\n"); 4782 } 4783 4784 if (value_len == sizeof(sp->chap.challenge) && 4785 value_len == sizeof(sp->chap.digest)) { 4786 MD5Init(&ctx); 4787 MD5Update(&ctx, &h->ident, 1); 4788 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 4789 MD5Update(&ctx, sp->chap.challenge, sizeof(sp->chap.challenge)); 4790 MD5Final(digest, &ctx); 4791 4792 if (memcmp(digest, value, value_len) == 0) { 4793 sp->scp[IDX_CHAP].rcr_type = CP_RCR_ACK; 4794 if (!ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_PEER) || 4795 sp->chap.rechallenging) { 4796 /* generate a dummy RCA event*/ 4797 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rca); 4798 } 4799 } else { 4800 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4801 } 4802 } else { 4803 if (debug) 4804 log(LOG_DEBUG, 4805 "%s: chap bad hash value length: " 4806 "%d bytes, should be %zu\n", 4807 ifp->if_xname, value_len, 4808 sizeof(sp->chap.challenge)); 4809 4810 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4811 } 4812 4813 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4814 break; 4815 4816 default: 4817 /* Unknown CHAP packet type -- ignore. */ 4818 if (debug) { 4819 log(LOG_DEBUG, "%s: chap unknown input(%s) " 4820 "<0x%x id=0x%xh len=%d", 4821 ifp->if_xname, 4822 sppp_state_name(sp->scp[IDX_CHAP].state), 4823 h->type, h->ident, ntohs(h->len)); 4824 if (len > 4) 4825 sppp_print_bytes((u_char *)(h + 1), len - 4); 4826 addlog(">\n"); 4827 } 4828 break; 4829 4830 } 4831 4832 SPPP_UNLOCK(sp); 4833 } 4834 4835 static void 4836 sppp_chap_init(struct sppp *sp) 4837 { 4838 4839 KASSERT(SPPP_WLOCKED(sp)); 4840 4841 sppp_cp_init(&chap, sp); 4842 4843 SPPP_WQ_SET(&sp->chap.work_challenge_rcvd, 4844 sppp_chap_rcv_challenge_event, &chap); 4845 } 4846 4847 static void 4848 sppp_chap_open(struct sppp *sp, void *xcp) 4849 { 4850 4851 KASSERT(SPPP_WLOCKED(sp)); 4852 4853 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4854 sp->chap.digest_len = 0; 4855 sp->chap.rechallenging = false; 4856 sp->chap.response_rcvd = false; 4857 sppp_open_event(sp, xcp); 4858 } 4859 4860 static void 4861 sppp_chap_tlu(struct sppp *sp) 4862 { 4863 STDDCL; 4864 int i, x; 4865 4866 KASSERT(SPPP_WLOCKED(sp)); 4867 4868 i = 0; 4869 sp->scp[IDX_CHAP].rst_counter = sp->lcp.max_configure; 4870 x = splnet(); 4871 sp->pp_auth_failures = 0; 4872 splx(x); 4873 4874 log(LOG_DEBUG, "%s: chap %s", ifp->if_xname, 4875 sp->pp_phase == SPPP_PHASE_NETWORK ? "reconfirmed" : "tlu"); 4876 4877 /* 4878 * Some broken CHAP implementations (Conware CoNet, firmware 4879 * 4.0.?) don't want to re-authenticate their CHAP once the 4880 * initial challenge-response exchange has taken place. 4881 * Provide for an option to avoid rechallenges. 4882 */ 4883 if (ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_SERV) && 4884 (sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4885 /* 4886 * Compute the re-challenge timeout. This will yield 4887 * a number between 300 and 810 seconds. 4888 */ 4889 i = 300 + ((unsigned)(cprng_fast32() & 0xff00) >> 7); 4890 callout_schedule(&sp->scp[IDX_CHAP].ch, i * hz); 4891 4892 if (debug) { 4893 addlog(", next rechallenge in %d seconds", i); 4894 } 4895 } 4896 4897 addlog("\n"); 4898 4899 /* 4900 * If we are already in phase network, we are done here. This 4901 * is the case if this is a dummy tlu event after a re-challenge. 4902 */ 4903 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4904 sppp_phase_network(sp); 4905 } 4906 4907 static void 4908 sppp_chap_scr(struct sppp *sp) 4909 { 4910 uint32_t *ch; 4911 u_char clen, dsize; 4912 int role; 4913 4914 KASSERT(SPPP_WLOCKED(sp)); 4915 4916 role = sppp_auth_role(&chap, sp); 4917 4918 if (ISSET(role, SPPP_AUTH_SERV) && 4919 !sp->chap.response_rcvd) { 4920 /* we are authenticator for CHAP, send challenge */ 4921 ch = (uint32_t *)sp->chap.challenge; 4922 clen = sizeof(sp->chap.challenge); 4923 /* Compute random challenge. */ 4924 cprng_strong(kern_cprng, ch, clen, 0); 4925 4926 sp->scp[IDX_CHAP].confid = ++sp->scp[IDX_CHAP].seq; 4927 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->scp[IDX_CHAP].confid, 4928 sizeof(clen), (const char *)&clen, 4929 sizeof(sp->chap.challenge), sp->chap.challenge, 4930 0); 4931 } 4932 4933 if (ISSET(role, SPPP_AUTH_PEER) && 4934 sp->chap.digest_len > 0) { 4935 /* we are peer for CHAP, send response */ 4936 dsize = sp->chap.digest_len; 4937 4938 sppp_auth_send(&chap, sp, CHAP_RESPONSE, sp->scp[IDX_CHAP].rconfid, 4939 sizeof(dsize), (const char *)&dsize, 4940 sp->chap.digest_len, sp->chap.digest, 4941 sp->myauth.name_len, sp->myauth.name, 0); 4942 } 4943 } 4944 4945 static void 4946 sppp_chap_rcv_challenge_event(struct sppp *sp, void *xcp) 4947 { 4948 const struct cp *cp = xcp; 4949 4950 KASSERT(!cpu_softintr_p()); 4951 4952 sp->chap.rechallenging = false; 4953 4954 switch (sp->scp[IDX_CHAP].state) { 4955 case STATE_REQ_SENT: 4956 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 4957 cp->scr(sp); 4958 break; 4959 case STATE_OPENED: 4960 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 4961 cp->scr(sp); 4962 break; 4963 } 4964 } 4965 4966 /* 4967 *--------------------------------------------------------------------------* 4968 * * 4969 * The PAP implementation. * 4970 * * 4971 *--------------------------------------------------------------------------* 4972 */ 4973 /* 4974 * PAP uses following actions and events. 4975 * Actions: 4976 * - scr: send PAP_REQ 4977 * - sca: send PAP_ACK 4978 * - scn: send PAP_NAK 4979 * Events: 4980 * - RCR+: receive PAP_REQ containing correct username and password 4981 * - RCR-: receive PAP_REQ containing wrong username and password 4982 * - RCA: receive PAP_ACK 4983 * - RCN: (this event is unused) 4984 * - TO+: re-send PAP_REQ 4985 * - TO-: this layer finish 4986 */ 4987 4988 /* 4989 * Handle incoming PAP packets. */ 4990 static void 4991 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4992 { 4993 STDDCL; 4994 struct lcp_header *h; 4995 int len, x; 4996 char *name, *secret; 4997 int name_len, secret_len; 4998 4999 /* 5000 * Malicious input might leave this uninitialized, so 5001 * init to an impossible value. 5002 */ 5003 secret_len = -1; 5004 5005 len = m->m_pkthdr.len; 5006 if (len < 5) { 5007 if (debug) 5008 log(LOG_DEBUG, 5009 "%s: pap invalid packet length: %d bytes\n", 5010 ifp->if_xname, len); 5011 return; 5012 } 5013 h = mtod(m, struct lcp_header *); 5014 if (len > ntohs(h->len)) 5015 len = ntohs(h->len); 5016 5017 SPPP_LOCK(sp, RW_WRITER); 5018 5019 switch (h->type) { 5020 /* PAP request is my authproto */ 5021 case PAP_REQ: 5022 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 5023 /* can't do anything useful */ 5024 printf("%s: pap request" 5025 " without his name and his secret being set\n", 5026 ifp->if_xname); 5027 break; 5028 } 5029 name = 1 + (u_char *)(h + 1); 5030 name_len = name[-1]; 5031 secret = name + name_len + 1; 5032 if (name_len > len - 6 || 5033 (secret_len = secret[-1]) > len - 6 - name_len) { 5034 if (debug) { 5035 log(LOG_DEBUG, "%s: pap corrupted input " 5036 "<%s id=0x%x len=%d", 5037 ifp->if_xname, 5038 sppp_auth_type_name(PPP_PAP, h->type), 5039 h->ident, ntohs(h->len)); 5040 if (len > 4) 5041 sppp_print_bytes((u_char *)(h + 1), 5042 len - 4); 5043 addlog(">\n"); 5044 } 5045 break; 5046 } 5047 if (debug) { 5048 log(LOG_DEBUG, "%s: pap input(%s) " 5049 "<%s id=0x%x len=%d name=", 5050 ifp->if_xname, 5051 sppp_state_name(sp->scp[IDX_PAP].state), 5052 sppp_auth_type_name(PPP_PAP, h->type), 5053 h->ident, ntohs(h->len)); 5054 sppp_print_string((char *)name, name_len); 5055 addlog(" secret="); 5056 sppp_print_string((char *)secret, secret_len); 5057 addlog(">\n"); 5058 } 5059 5060 sp->scp[IDX_PAP].rconfid = h->ident; 5061 5062 if (name_len == sp->hisauth.name_len && 5063 memcmp(name, sp->hisauth.name, name_len) == 0 && 5064 secret_len == sp->hisauth.secret_len && 5065 memcmp(secret, sp->hisauth.secret, secret_len) == 0) { 5066 sp->scp[IDX_PAP].rcr_type = CP_RCR_ACK; 5067 if (!ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_PEER)) { 5068 /* generate a dummy RCA event*/ 5069 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rca); 5070 } 5071 } else { 5072 sp->scp[IDX_PAP].rcr_type = CP_RCR_NAK; 5073 } 5074 5075 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rcr); 5076 break; 5077 5078 /* ack and nak are his authproto */ 5079 case PAP_ACK: 5080 if (debug) { 5081 log(LOG_DEBUG, "%s: pap success", 5082 ifp->if_xname); 5083 name = 1 + (u_char *)(h + 1); 5084 name_len = name[-1]; 5085 if (len > 5 && name_len < len+4) { 5086 addlog(": "); 5087 sppp_print_string(name, name_len); 5088 } 5089 addlog("\n"); 5090 } 5091 5092 if (h->ident != sp->scp[IDX_PAP].confid) { 5093 if (debug) { 5094 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 5095 ifp->if_xname, pap.name, 5096 h->ident, sp->scp[IDX_PAP].rconfid); 5097 } 5098 if_statinc(ifp, if_ierrors); 5099 break; 5100 } 5101 5102 x = splnet(); 5103 sp->pp_auth_failures = 0; 5104 sp->pp_flags &= ~PP_NEEDAUTH; 5105 splx(x); 5106 5107 /* we are not authenticator, generate a dummy RCR+ event */ 5108 if (!ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_SERV)) { 5109 sp->scp[IDX_PAP].rcr_type = CP_RCR_ACK; 5110 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rcr); 5111 } 5112 5113 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rca); 5114 break; 5115 5116 case PAP_NAK: 5117 if (debug) { 5118 log(LOG_INFO, "%s: pap failure", 5119 ifp->if_xname); 5120 name = 1 + (u_char *)(h + 1); 5121 name_len = name[-1]; 5122 if (len > 5 && name_len < len+4) { 5123 addlog(": "); 5124 sppp_print_string(name, name_len); 5125 } 5126 addlog("\n"); 5127 } else 5128 log(LOG_INFO, "%s: pap failure\n", 5129 ifp->if_xname); 5130 5131 if (h->ident != sp->scp[IDX_PAP].confid) { 5132 if (debug) { 5133 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 5134 ifp->if_xname, pap.name, 5135 h->ident, sp->scp[IDX_PAP].rconfid); 5136 } 5137 if_statinc(ifp, if_ierrors); 5138 break; 5139 } 5140 5141 sp->pp_auth_failures++; 5142 /* 5143 * await LCP shutdown by authenticator, 5144 * so we don't have to enqueue sc->scp[IDX_PAP].work_rcn 5145 */ 5146 break; 5147 5148 default: 5149 /* Unknown PAP packet type -- ignore. */ 5150 if (debug) { 5151 log(LOG_DEBUG, "%s: pap corrupted input " 5152 "<0x%x id=0x%x len=%d", 5153 ifp->if_xname, 5154 h->type, h->ident, ntohs(h->len)); 5155 if (len > 4) 5156 sppp_print_bytes((u_char *)(h + 1), len - 4); 5157 addlog(">\n"); 5158 } 5159 break; 5160 } 5161 5162 SPPP_UNLOCK(sp); 5163 } 5164 5165 static void 5166 sppp_pap_init(struct sppp *sp) 5167 { 5168 5169 KASSERT(SPPP_WLOCKED(sp)); 5170 sppp_cp_init(&pap, sp); 5171 } 5172 5173 static void 5174 sppp_pap_tlu(struct sppp *sp) 5175 { 5176 STDDCL; 5177 int x; 5178 5179 sp->scp[IDX_PAP].rst_counter = sp->lcp.max_configure; 5180 5181 if (debug) 5182 log(LOG_DEBUG, "%s: %s tlu\n", 5183 ifp->if_xname, pap.name); 5184 5185 x = splnet(); 5186 sp->pp_auth_failures = 0; 5187 splx(x); 5188 5189 if (sp->pp_phase < SPPP_PHASE_NETWORK) 5190 sppp_phase_network(sp); 5191 } 5192 5193 static void 5194 sppp_pap_scr(struct sppp *sp) 5195 { 5196 u_char idlen, pwdlen; 5197 5198 KASSERT(SPPP_WLOCKED(sp)); 5199 5200 if (ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_PEER) && 5201 sp->scp[IDX_PAP].state != STATE_ACK_RCVD) { 5202 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 5203 log(LOG_DEBUG, "%s: couldn't send PAP_REQ " 5204 "because of no name or no secret\n", 5205 sp->pp_if.if_xname); 5206 } else { 5207 sp->scp[IDX_PAP].confid = ++sp->scp[IDX_PAP].seq; 5208 pwdlen = sp->myauth.secret_len; 5209 idlen = sp->myauth.name_len; 5210 5211 sppp_auth_send(&pap, sp, PAP_REQ, sp->scp[IDX_PAP].confid, 5212 sizeof idlen, (const char *)&idlen, 5213 idlen, sp->myauth.name, 5214 sizeof pwdlen, (const char *)&pwdlen, 5215 pwdlen, sp->myauth.secret, 5216 0); 5217 } 5218 } 5219 } 5220 5221 /* 5222 * Random miscellaneous functions. 5223 */ 5224 5225 /* 5226 * Send a PAP or CHAP proto packet. 5227 * 5228 * Varadic function, each of the elements for the ellipsis is of type 5229 * ``size_t mlen, const u_char *msg''. Processing will stop iff 5230 * mlen == 0. 5231 * NOTE: never declare variadic functions with types subject to type 5232 * promotion (i.e. u_char). This is asking for big trouble depending 5233 * on the architecture you are on... 5234 */ 5235 5236 static void 5237 sppp_auth_send(const struct cp *cp, struct sppp *sp, 5238 unsigned int type, unsigned int id, 5239 ...) 5240 { 5241 STDDCL; 5242 struct lcp_header *lh; 5243 struct mbuf *m; 5244 u_char *p; 5245 int len; 5246 size_t pkthdrlen; 5247 unsigned int mlen; 5248 const char *msg; 5249 va_list ap; 5250 5251 KASSERT(SPPP_WLOCKED(sp)); 5252 5253 MGETHDR(m, M_DONTWAIT, MT_DATA); 5254 if (! m) 5255 return; 5256 m_reset_rcvif(m); 5257 5258 if (sp->pp_flags & PP_NOFRAMING) { 5259 *mtod(m, uint16_t *) = htons(cp->proto); 5260 pkthdrlen = 2; 5261 lh = (struct lcp_header *)(mtod(m, uint8_t *)+2); 5262 } else { 5263 struct ppp_header *h; 5264 h = mtod(m, struct ppp_header *); 5265 h->address = PPP_ALLSTATIONS; /* broadcast address */ 5266 h->control = PPP_UI; /* Unnumbered Info */ 5267 h->protocol = htons(cp->proto); 5268 pkthdrlen = PPP_HEADER_LEN; 5269 5270 lh = (struct lcp_header *)(h + 1); 5271 } 5272 5273 lh->type = type; 5274 lh->ident = id; 5275 p = (u_char *)(lh + 1); 5276 5277 va_start(ap, id); 5278 len = 0; 5279 5280 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 5281 msg = va_arg(ap, const char *); 5282 len += mlen; 5283 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 5284 va_end(ap); 5285 m_freem(m); 5286 return; 5287 } 5288 5289 memcpy(p, msg, mlen); 5290 p += mlen; 5291 } 5292 va_end(ap); 5293 5294 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 5295 lh->len = htons(LCP_HEADER_LEN + len); 5296 5297 if (debug) { 5298 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 5299 ifp->if_xname, cp->name, 5300 sppp_auth_type_name(cp->proto, lh->type), 5301 lh->ident, ntohs(lh->len)); 5302 if (len) 5303 sppp_print_bytes((u_char *)(lh + 1), len); 5304 addlog(">\n"); 5305 } 5306 if (IF_QFULL(&sp->pp_cpq)) { 5307 IF_DROP(&sp->pp_fastq); 5308 IF_DROP(&ifp->if_snd); 5309 m_freem(m); 5310 if_statinc(ifp, if_oerrors); 5311 return; 5312 } 5313 5314 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 5315 IF_ENQUEUE(&sp->pp_cpq, m); 5316 5317 if (! (ifp->if_flags & IFF_OACTIVE)) { 5318 SPPP_UNLOCK(sp); 5319 if_start_lock(ifp); 5320 SPPP_LOCK(sp, RW_WRITER); 5321 } 5322 } 5323 5324 static int 5325 sppp_auth_role(const struct cp *cp, struct sppp *sp) 5326 { 5327 int role; 5328 5329 role = SPPP_AUTH_NOROLE; 5330 5331 if (sp->hisauth.proto == cp->proto && 5332 ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO)) 5333 SET(role, SPPP_AUTH_SERV); 5334 5335 if (sp->myauth.proto == cp->proto) 5336 SET(role, SPPP_AUTH_PEER); 5337 5338 return role; 5339 } 5340 5341 static void 5342 sppp_auth_to_event(struct sppp *sp, void *xcp) 5343 { 5344 const struct cp *cp = xcp; 5345 bool override; 5346 int state; 5347 STDDCL; 5348 5349 KASSERT(SPPP_WLOCKED(sp)); 5350 KASSERT(!cpu_softintr_p()); 5351 5352 override = false; 5353 state = sp->scp[cp->protoidx].state; 5354 5355 if (sp->scp[cp->protoidx].rst_counter > 0) { 5356 /* override TO+ event */ 5357 switch (state) { 5358 case STATE_OPENED: 5359 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 5360 override = true; 5361 sp->chap.rechallenging = true; 5362 sp->chap.response_rcvd = false; 5363 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 5364 cp->scr(sp); 5365 } 5366 break; 5367 5368 case STATE_ACK_RCVD: 5369 override = true; 5370 cp->scr(sp); 5371 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 5372 break; 5373 } 5374 } 5375 5376 if (override) { 5377 if (debug) 5378 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 5379 ifp->if_xname, cp->name, 5380 sppp_state_name(state), 5381 sp->scp[cp->protoidx].rst_counter); 5382 sp->scp[cp->protoidx].rst_counter--; 5383 } else { 5384 sppp_to_event(sp, xcp); 5385 } 5386 } 5387 5388 static void 5389 sppp_auth_sca_scn(const struct cp *cp, struct sppp *sp) 5390 { 5391 static const char *succmsg = "Welcome!"; 5392 static const char *failmsg = "Failed..."; 5393 const char *msg; 5394 u_char type, rconfid, mlen; 5395 5396 KASSERT(SPPP_WLOCKED(sp)); 5397 5398 if (!ISSET(sppp_auth_role(cp, sp), SPPP_AUTH_SERV)) 5399 return; 5400 5401 rconfid = sp->scp[cp->protoidx].rconfid; 5402 5403 if (sp->scp[cp->protoidx].rcr_type == CP_RCR_ACK) { 5404 type = cp->proto == PPP_CHAP ? CHAP_SUCCESS : PAP_ACK; 5405 msg = succmsg; 5406 mlen = sizeof(succmsg) - 1; 5407 5408 sp->pp_auth_failures = 0; 5409 } else { 5410 type = cp->proto == PPP_CHAP ? CHAP_FAILURE : PAP_NAK; 5411 msg = failmsg; 5412 mlen = sizeof(failmsg) - 1; 5413 5414 /* shutdown LCP if auth failed */ 5415 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5416 sp->pp_auth_failures++; 5417 } 5418 5419 sppp_auth_send(cp, sp, type, rconfid, 5420 mlen, (const u_char *)msg, 0); 5421 } 5422 5423 /* 5424 * Send keepalive packets, every 10 seconds. 5425 */ 5426 static void 5427 sppp_keepalive(void *dummy) 5428 { 5429 struct sppp *sp; 5430 int s; 5431 time_t now; 5432 5433 SPPPQ_LOCK(); 5434 5435 s = splnet(); 5436 now = time_uptime; 5437 for (sp=spppq; sp; sp=sp->pp_next) { 5438 struct ifnet *ifp = NULL; 5439 5440 SPPP_LOCK(sp, RW_WRITER); 5441 ifp = &sp->pp_if; 5442 5443 /* check idle timeout */ 5444 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 5445 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 5446 /* idle timeout is enabled for this interface */ 5447 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 5448 if (ifp->if_flags & IFF_DEBUG) 5449 printf("%s: no activity for %lu seconds\n", 5450 sp->pp_if.if_xname, 5451 (unsigned long)(now-sp->pp_last_activity)); 5452 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5453 SPPP_UNLOCK(sp); 5454 continue; 5455 } 5456 } 5457 5458 /* Keepalive mode disabled or channel down? */ 5459 if (! (sp->pp_flags & PP_KEEPALIVE) || 5460 ! (ifp->if_flags & IFF_RUNNING)) { 5461 SPPP_UNLOCK(sp); 5462 continue; 5463 } 5464 5465 /* No keepalive in PPP mode if LCP not opened yet. */ 5466 if (! (sp->pp_flags & PP_CISCO) && 5467 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 5468 SPPP_UNLOCK(sp); 5469 continue; 5470 } 5471 5472 /* No echo reply, but maybe user data passed through? */ 5473 if ((now - sp->pp_last_receive) < sp->pp_max_noreceive) { 5474 sp->pp_alivecnt = 0; 5475 SPPP_UNLOCK(sp); 5476 continue; 5477 } 5478 5479 if (sp->pp_alivecnt >= sp->pp_maxalive) { 5480 /* No keepalive packets got. Stop the interface. */ 5481 sppp_wq_add(sp->wq_cp, &sp->work_ifdown); 5482 5483 if (! (sp->pp_flags & PP_CISCO)) { 5484 printf("%s: LCP keepalive timed out, going to restart the connection\n", 5485 ifp->if_xname); 5486 sp->pp_alivecnt = 0; 5487 5488 /* we are down, close all open protocols */ 5489 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5490 5491 /* And now prepare LCP to reestablish the link, if configured to do so. */ 5492 sp->lcp.reestablish = true; 5493 5494 SPPP_UNLOCK(sp); 5495 continue; 5496 } 5497 } 5498 if (sp->pp_alivecnt < sp->pp_maxalive) 5499 ++sp->pp_alivecnt; 5500 if (sp->pp_flags & PP_CISCO) 5501 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, 5502 ++sp->scp[IDX_LCP].seq, sp->scp[IDX_LCP].rseq); 5503 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 5504 int32_t nmagic = htonl(sp->lcp.magic); 5505 sp->lcp.echoid = ++sp->scp[IDX_LCP].seq; 5506 sppp_cp_send(sp, PPP_LCP, ECHO_REQ, 5507 sp->lcp.echoid, 4, &nmagic); 5508 } 5509 5510 SPPP_UNLOCK(sp); 5511 } 5512 splx(s); 5513 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 5514 5515 SPPPQ_UNLOCK(); 5516 } 5517 5518 #ifdef INET 5519 /* 5520 * Get both IP addresses. 5521 */ 5522 static void 5523 sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, uint32_t *srcmask) 5524 { 5525 struct ifnet *ifp = &sp->pp_if; 5526 struct ifaddr *ifa; 5527 struct sockaddr_in *si, *sm; 5528 uint32_t ssrc, ddst; 5529 int s; 5530 struct psref psref; 5531 5532 sm = NULL; 5533 ssrc = ddst = 0; 5534 /* 5535 * Pick the first AF_INET address from the list, 5536 * aliases don't make any sense on a p2p link anyway. 5537 */ 5538 si = 0; 5539 s = pserialize_read_enter(); 5540 IFADDR_READER_FOREACH(ifa, ifp) { 5541 if (ifa->ifa_addr->sa_family == AF_INET) { 5542 si = (struct sockaddr_in *)ifa->ifa_addr; 5543 sm = (struct sockaddr_in *)ifa->ifa_netmask; 5544 if (si) { 5545 ifa_acquire(ifa, &psref); 5546 break; 5547 } 5548 } 5549 } 5550 pserialize_read_exit(s); 5551 if (ifa) { 5552 if (si && si->sin_addr.s_addr) { 5553 ssrc = si->sin_addr.s_addr; 5554 if (srcmask) 5555 *srcmask = ntohl(sm->sin_addr.s_addr); 5556 } 5557 5558 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 5559 if (si && si->sin_addr.s_addr) 5560 ddst = si->sin_addr.s_addr; 5561 ifa_release(ifa, &psref); 5562 } 5563 5564 if (dst) *dst = ntohl(ddst); 5565 if (src) *src = ntohl(ssrc); 5566 } 5567 5568 /* 5569 * Set IP addresses. Must be called at splnet. 5570 * If an address is 0, leave it the way it is. 5571 */ 5572 static void 5573 sppp_set_ip_addrs(struct sppp *sp) 5574 { 5575 STDDCL; 5576 struct ifaddr *ifa; 5577 struct sockaddr_in *si, *dest; 5578 uint32_t myaddr = 0, hisaddr = 0; 5579 int s; 5580 5581 KASSERT(SPPP_WLOCKED(sp)); 5582 SPPP_UNLOCK(sp); 5583 IFNET_LOCK(ifp); 5584 SPPP_LOCK(sp, RW_WRITER); 5585 5586 /* 5587 * Pick the first AF_INET address from the list, 5588 * aliases don't make any sense on a p2p link anyway. 5589 */ 5590 si = dest = NULL; 5591 s = pserialize_read_enter(); 5592 IFADDR_READER_FOREACH(ifa, ifp) { 5593 if (ifa->ifa_addr->sa_family == AF_INET) { 5594 si = (struct sockaddr_in *)ifa->ifa_addr; 5595 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5596 break; 5597 } 5598 } 5599 pserialize_read_exit(s); 5600 5601 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 5602 myaddr = sp->ipcp.req_myaddr; 5603 else if (si != NULL) 5604 myaddr = ntohl(si->sin_addr.s_addr); 5605 5606 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 5607 hisaddr = sp->ipcp.req_hisaddr; 5608 else if (dest != NULL) 5609 hisaddr = ntohl(dest->sin_addr.s_addr); 5610 5611 if (si != NULL && dest != NULL) { 5612 int error; 5613 struct sockaddr_in new_sin = *si; 5614 struct sockaddr_in new_dst = *dest; 5615 5616 if (myaddr != 0) 5617 new_sin.sin_addr.s_addr = htonl(myaddr); 5618 if (hisaddr != 0) { 5619 new_dst.sin_addr.s_addr = htonl(hisaddr); 5620 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) 5621 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 5622 } 5623 5624 in_addrhash_remove(ifatoia(ifa)); 5625 5626 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5627 5628 in_addrhash_insert(ifatoia(ifa)); 5629 5630 if (debug && error) 5631 { 5632 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5633 ifp->if_xname, __func__, error); 5634 } 5635 if (!error) { 5636 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5637 } 5638 } 5639 5640 IFNET_UNLOCK(ifp); 5641 5642 sppp_notify_con(sp); 5643 } 5644 5645 /* 5646 * Clear IP addresses. Must be called at splnet. 5647 */ 5648 static void 5649 sppp_clear_ip_addrs(struct sppp *sp) 5650 { 5651 STDDCL; 5652 struct ifaddr *ifa; 5653 struct sockaddr_in *si, *dest; 5654 int s; 5655 5656 KASSERT(SPPP_WLOCKED(sp)); 5657 SPPP_UNLOCK(sp); 5658 IFNET_LOCK(ifp); 5659 SPPP_LOCK(sp, RW_WRITER); 5660 5661 /* 5662 * Pick the first AF_INET address from the list, 5663 * aliases don't make any sense on a p2p link anyway. 5664 */ 5665 si = dest = NULL; 5666 s = pserialize_read_enter(); 5667 IFADDR_READER_FOREACH(ifa, ifp) { 5668 if (ifa->ifa_addr->sa_family == AF_INET) { 5669 si = (struct sockaddr_in *)ifa->ifa_addr; 5670 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5671 break; 5672 } 5673 } 5674 pserialize_read_exit(s); 5675 5676 if (si != NULL) { 5677 struct sockaddr_in new_sin = *si; 5678 struct sockaddr_in new_dst = *dest; 5679 int error; 5680 5681 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 5682 new_sin.sin_addr.s_addr = 0; 5683 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 5684 new_dst.sin_addr.s_addr = sp->ipcp.saved_hisaddr; 5685 5686 in_addrhash_remove(ifatoia(ifa)); 5687 5688 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5689 5690 in_addrhash_insert(ifatoia(ifa)); 5691 5692 if (debug && error) 5693 { 5694 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5695 ifp->if_xname, __func__, error); 5696 } 5697 if (!error) { 5698 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5699 } 5700 } 5701 5702 IFNET_UNLOCK(ifp); 5703 } 5704 #endif 5705 5706 #ifdef INET6 5707 /* 5708 * Get both IPv6 addresses. 5709 */ 5710 static void 5711 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 5712 struct in6_addr *srcmask) 5713 { 5714 struct ifnet *ifp = &sp->pp_if; 5715 struct ifaddr *ifa; 5716 struct sockaddr_in6 *si, *sm; 5717 struct in6_addr ssrc, ddst; 5718 int s; 5719 struct psref psref; 5720 5721 sm = NULL; 5722 memset(&ssrc, 0, sizeof(ssrc)); 5723 memset(&ddst, 0, sizeof(ddst)); 5724 /* 5725 * Pick the first link-local AF_INET6 address from the list, 5726 * aliases don't make any sense on a p2p link anyway. 5727 */ 5728 si = 0; 5729 s = pserialize_read_enter(); 5730 IFADDR_READER_FOREACH(ifa, ifp) { 5731 if (ifa->ifa_addr->sa_family == AF_INET6) { 5732 si = (struct sockaddr_in6 *)ifa->ifa_addr; 5733 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 5734 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) { 5735 ifa_acquire(ifa, &psref); 5736 break; 5737 } 5738 } 5739 } 5740 pserialize_read_exit(s); 5741 5742 if (ifa) { 5743 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 5744 memcpy(&ssrc, &si->sin6_addr, sizeof(ssrc)); 5745 if (srcmask) { 5746 memcpy(srcmask, &sm->sin6_addr, 5747 sizeof(*srcmask)); 5748 } 5749 } 5750 5751 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 5752 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 5753 memcpy(&ddst, &si->sin6_addr, sizeof(ddst)); 5754 ifa_release(ifa, &psref); 5755 } 5756 5757 if (dst) 5758 memcpy(dst, &ddst, sizeof(*dst)); 5759 if (src) 5760 memcpy(src, &ssrc, sizeof(*src)); 5761 } 5762 5763 #ifdef IPV6CP_MYIFID_DYN 5764 /* 5765 * Generate random ifid. 5766 */ 5767 static void 5768 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 5769 { 5770 /* TBD */ 5771 } 5772 5773 /* 5774 * Set my IPv6 address. Must be called at splnet. 5775 */ 5776 static void 5777 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 5778 { 5779 STDDCL; 5780 struct ifaddr *ifa; 5781 struct sockaddr_in6 *sin6; 5782 int s; 5783 struct psref psref; 5784 5785 KASSERT(SPPP_WLOCKED(sp)); 5786 SPPP_UNLOCK(sp); 5787 IFNET_LOCK(ifp); 5788 SPPP_LOCK(sp, RW_WRITER); 5789 5790 /* 5791 * Pick the first link-local AF_INET6 address from the list, 5792 * aliases don't make any sense on a p2p link anyway. 5793 */ 5794 5795 sin6 = NULL; 5796 s = pserialize_read_enter(); 5797 IFADDR_READER_FOREACH(ifa, ifp) 5798 { 5799 if (ifa->ifa_addr->sa_family == AF_INET6) 5800 { 5801 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 5802 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 5803 ifa_acquire(ifa, &psref); 5804 break; 5805 } 5806 } 5807 } 5808 pserialize_read_exit(s); 5809 5810 if (ifa && sin6) 5811 { 5812 int error; 5813 struct sockaddr_in6 new_sin6 = *sin6; 5814 5815 memcpy(&new_sin6.sin6_addr, src, sizeof(new_sin6.sin6_addr)); 5816 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 5817 if (debug && error) 5818 { 5819 log(LOG_DEBUG, "%s: %s: in6_ifinit failed, error=%d\n", 5820 ifp->if_xname, __func__, error); 5821 } 5822 if (!error) { 5823 pfil_run_addrhooks(if_pfil, SIOCAIFADDR_IN6, ifa); 5824 } 5825 ifa_release(ifa, &psref); 5826 } 5827 5828 IFNET_UNLOCK(ifp); 5829 } 5830 #endif 5831 5832 /* 5833 * Suggest a candidate address to be used by peer. 5834 */ 5835 static void 5836 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 5837 { 5838 struct in6_addr myaddr; 5839 struct timeval tv; 5840 5841 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 5842 5843 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 5844 microtime(&tv); 5845 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 5846 myaddr.s6_addr[14] ^= 0xff; 5847 myaddr.s6_addr[15] ^= 0xff; 5848 } else { 5849 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 5850 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 5851 } 5852 if (suggest) 5853 memcpy(suggest, &myaddr, sizeof(myaddr)); 5854 } 5855 #endif /*INET6*/ 5856 5857 /* 5858 * Process ioctl requests specific to the PPP interface. 5859 * Permissions have already been checked. 5860 */ 5861 static int 5862 sppp_params(struct sppp *sp, u_long cmd, void *data) 5863 { 5864 switch (cmd) { 5865 case SPPPGETAUTHCFG: 5866 { 5867 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5868 int error; 5869 size_t len; 5870 5871 SPPP_LOCK(sp, RW_READER); 5872 5873 cfg->myauthflags = sp->myauth.flags; 5874 cfg->hisauthflags = sp->hisauth.flags; 5875 strlcpy(cfg->ifname, sp->pp_if.if_xname, sizeof(cfg->ifname)); 5876 cfg->hisauth = 0; 5877 if (sp->hisauth.proto) 5878 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5879 cfg->myauth = 0; 5880 if (sp->myauth.proto) 5881 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5882 if (cfg->myname_length == 0) { 5883 if (sp->myauth.name != NULL) 5884 cfg->myname_length = sp->myauth.name_len + 1; 5885 } else { 5886 if (sp->myauth.name == NULL) { 5887 cfg->myname_length = 0; 5888 } else { 5889 len = sp->myauth.name_len + 1; 5890 5891 if (cfg->myname_length < len) { 5892 SPPP_UNLOCK(sp); 5893 return (ENAMETOOLONG); 5894 } 5895 error = copyout(sp->myauth.name, cfg->myname, len); 5896 if (error) { 5897 SPPP_UNLOCK(sp); 5898 return error; 5899 } 5900 } 5901 } 5902 if (cfg->hisname_length == 0) { 5903 if (sp->hisauth.name != NULL) 5904 cfg->hisname_length = sp->hisauth.name_len + 1; 5905 } else { 5906 if (sp->hisauth.name == NULL) { 5907 cfg->hisname_length = 0; 5908 } else { 5909 len = sp->hisauth.name_len + 1; 5910 5911 if (cfg->hisname_length < len) { 5912 SPPP_UNLOCK(sp); 5913 return (ENAMETOOLONG); 5914 } 5915 error = copyout(sp->hisauth.name, cfg->hisname, len); 5916 if (error) { 5917 SPPP_UNLOCK(sp); 5918 return error; 5919 } 5920 } 5921 } 5922 SPPP_UNLOCK(sp); 5923 } 5924 break; 5925 case SPPPSETAUTHCFG: 5926 { 5927 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5928 int error; 5929 5930 SPPP_LOCK(sp, RW_WRITER); 5931 5932 if (sp->myauth.name) { 5933 free(sp->myauth.name, M_DEVBUF); 5934 sp->myauth.name = NULL; 5935 } 5936 if (sp->myauth.secret) { 5937 free(sp->myauth.secret, M_DEVBUF); 5938 sp->myauth.secret = NULL; 5939 } 5940 if (sp->hisauth.name) { 5941 free(sp->hisauth.name, M_DEVBUF); 5942 sp->hisauth.name = NULL; 5943 } 5944 if (sp->hisauth.secret) { 5945 free(sp->hisauth.secret, M_DEVBUF); 5946 sp->hisauth.secret = NULL; 5947 } 5948 5949 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5950 if (cfg->hisname_length >= MCLBYTES) { 5951 SPPP_UNLOCK(sp); 5952 return (ENAMETOOLONG); 5953 } 5954 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5955 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5956 if (error) { 5957 free(sp->hisauth.name, M_DEVBUF); 5958 sp->hisauth.name = NULL; 5959 SPPP_UNLOCK(sp); 5960 return error; 5961 } 5962 sp->hisauth.name_len = cfg->hisname_length - 1; 5963 sp->hisauth.name[sp->hisauth.name_len] = 0; 5964 } 5965 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5966 if (cfg->hissecret_length >= MCLBYTES) { 5967 SPPP_UNLOCK(sp); 5968 return (ENAMETOOLONG); 5969 } 5970 sp->hisauth.secret = malloc(cfg->hissecret_length, 5971 M_DEVBUF, M_WAITOK); 5972 error = copyin(cfg->hissecret, sp->hisauth.secret, 5973 cfg->hissecret_length); 5974 if (error) { 5975 free(sp->hisauth.secret, M_DEVBUF); 5976 sp->hisauth.secret = NULL; 5977 SPPP_UNLOCK(sp); 5978 return error; 5979 } 5980 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5981 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5982 } 5983 if (cfg->myname != NULL && cfg->myname_length > 0) { 5984 if (cfg->myname_length >= MCLBYTES) { 5985 SPPP_UNLOCK(sp); 5986 return (ENAMETOOLONG); 5987 } 5988 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5989 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5990 if (error) { 5991 free(sp->myauth.name, M_DEVBUF); 5992 sp->myauth.name = NULL; 5993 SPPP_UNLOCK(sp); 5994 return error; 5995 } 5996 sp->myauth.name_len = cfg->myname_length - 1; 5997 sp->myauth.name[sp->myauth.name_len] = 0; 5998 } 5999 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 6000 if (cfg->mysecret_length >= MCLBYTES) { 6001 SPPP_UNLOCK(sp); 6002 return (ENAMETOOLONG); 6003 } 6004 sp->myauth.secret = malloc(cfg->mysecret_length, 6005 M_DEVBUF, M_WAITOK); 6006 error = copyin(cfg->mysecret, sp->myauth.secret, 6007 cfg->mysecret_length); 6008 if (error) { 6009 free(sp->myauth.secret, M_DEVBUF); 6010 sp->myauth.secret = NULL; 6011 SPPP_UNLOCK(sp); 6012 return error; 6013 } 6014 sp->myauth.secret_len = cfg->mysecret_length - 1; 6015 sp->myauth.secret[sp->myauth.secret_len] = 0; 6016 } 6017 sp->myauth.flags = cfg->myauthflags; 6018 if (cfg->myauth) 6019 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 6020 sp->hisauth.flags = cfg->hisauthflags; 6021 if (cfg->hisauth) 6022 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 6023 sp->pp_auth_failures = 0; 6024 if (sp->hisauth.proto != 0) 6025 SET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 6026 else 6027 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 6028 6029 SPPP_UNLOCK(sp); 6030 } 6031 break; 6032 case SPPPGETLCPCFG: 6033 { 6034 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 6035 6036 SPPP_LOCK(sp, RW_READER); 6037 lcpp->lcp_timeout = sp->lcp.timeout; 6038 SPPP_UNLOCK(sp); 6039 } 6040 break; 6041 case SPPPSETLCPCFG: 6042 { 6043 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 6044 6045 SPPP_LOCK(sp, RW_WRITER); 6046 sp->lcp.timeout = lcpp->lcp_timeout; 6047 SPPP_UNLOCK(sp); 6048 } 6049 break; 6050 case SPPPGETSTATUS: 6051 { 6052 struct spppstatus *status = (struct spppstatus *)data; 6053 6054 SPPP_LOCK(sp, RW_READER); 6055 status->phase = sp->pp_phase; 6056 SPPP_UNLOCK(sp); 6057 } 6058 break; 6059 case SPPPGETSTATUSNCP: 6060 { 6061 struct spppstatusncp *status = (struct spppstatusncp *)data; 6062 6063 SPPP_LOCK(sp, RW_READER); 6064 status->phase = sp->pp_phase; 6065 status->ncpup = sppp_cp_check(sp, CP_NCP); 6066 SPPP_UNLOCK(sp); 6067 } 6068 break; 6069 case SPPPGETIDLETO: 6070 { 6071 struct spppidletimeout *to = (struct spppidletimeout *)data; 6072 6073 SPPP_LOCK(sp, RW_READER); 6074 to->idle_seconds = sp->pp_idle_timeout; 6075 SPPP_UNLOCK(sp); 6076 } 6077 break; 6078 case SPPPSETIDLETO: 6079 { 6080 struct spppidletimeout *to = (struct spppidletimeout *)data; 6081 6082 SPPP_LOCK(sp, RW_WRITER); 6083 sp->pp_idle_timeout = to->idle_seconds; 6084 SPPP_UNLOCK(sp); 6085 } 6086 break; 6087 case SPPPSETAUTHFAILURE: 6088 { 6089 struct spppauthfailuresettings *afsettings = 6090 (struct spppauthfailuresettings *)data; 6091 6092 SPPP_LOCK(sp, RW_WRITER); 6093 sp->pp_max_auth_fail = afsettings->max_failures; 6094 sp->pp_auth_failures = 0; 6095 SPPP_UNLOCK(sp); 6096 } 6097 break; 6098 case SPPPGETAUTHFAILURES: 6099 { 6100 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 6101 6102 SPPP_LOCK(sp, RW_READER); 6103 stats->auth_failures = sp->pp_auth_failures; 6104 stats->max_failures = sp->pp_max_auth_fail; 6105 SPPP_UNLOCK(sp); 6106 } 6107 break; 6108 case SPPPSETDNSOPTS: 6109 { 6110 struct spppdnssettings *req = (struct spppdnssettings *)data; 6111 6112 SPPP_LOCK(sp, RW_WRITER); 6113 sp->query_dns = req->query_dns & 3; 6114 SPPP_UNLOCK(sp); 6115 } 6116 break; 6117 case SPPPGETDNSOPTS: 6118 { 6119 struct spppdnssettings *req = (struct spppdnssettings *)data; 6120 6121 SPPP_LOCK(sp, RW_READER); 6122 req->query_dns = sp->query_dns; 6123 SPPP_UNLOCK(sp); 6124 } 6125 break; 6126 case SPPPGETDNSADDRS: 6127 { 6128 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; 6129 6130 SPPP_LOCK(sp, RW_READER); 6131 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 6132 SPPP_UNLOCK(sp); 6133 } 6134 break; 6135 case SPPPGETKEEPALIVE: 6136 { 6137 struct spppkeepalivesettings *settings = 6138 (struct spppkeepalivesettings*)data; 6139 6140 SPPP_LOCK(sp, RW_READER); 6141 settings->maxalive = sp->pp_maxalive; 6142 settings->max_noreceive = sp->pp_max_noreceive; 6143 SPPP_UNLOCK(sp); 6144 } 6145 break; 6146 case SPPPSETKEEPALIVE: 6147 { 6148 struct spppkeepalivesettings *settings = 6149 (struct spppkeepalivesettings*)data; 6150 6151 SPPP_LOCK(sp, RW_WRITER); 6152 sp->pp_maxalive = settings->maxalive; 6153 sp->pp_max_noreceive = settings->max_noreceive; 6154 SPPP_UNLOCK(sp); 6155 } 6156 break; 6157 case SPPPGETLCPSTATUS: 6158 { 6159 struct sppplcpstatus *status = 6160 (struct sppplcpstatus *)data; 6161 6162 SPPP_LOCK(sp, RW_READER); 6163 status->state = sp->scp[IDX_LCP].state; 6164 status->opts = sp->lcp.opts; 6165 status->magic = sp->lcp.magic; 6166 status->mru = sp->lcp.mru; 6167 SPPP_UNLOCK(sp); 6168 } 6169 break; 6170 case SPPPGETIPCPSTATUS: 6171 { 6172 struct spppipcpstatus *status = 6173 (struct spppipcpstatus *)data; 6174 u_int32_t myaddr; 6175 6176 SPPP_LOCK(sp, RW_READER); 6177 status->state = sp->scp[IDX_IPCP].state; 6178 status->opts = sp->ipcp.opts; 6179 #ifdef INET 6180 kpreempt_disable(); 6181 sppp_get_ip_addrs(sp, &myaddr, 0, 0); 6182 kpreempt_enable(); 6183 #else 6184 myaddr = 0; 6185 #endif 6186 status->myaddr = ntohl(myaddr); 6187 SPPP_UNLOCK(sp); 6188 } 6189 break; 6190 case SPPPGETIPV6CPSTATUS: 6191 { 6192 struct spppipv6cpstatus *status = 6193 (struct spppipv6cpstatus *)data; 6194 6195 SPPP_LOCK(sp, RW_READER); 6196 status->state = sp->scp[IDX_IPV6CP].state; 6197 memcpy(status->my_ifid, sp->ipv6cp.my_ifid, 6198 sizeof(status->my_ifid)); 6199 memcpy(status->his_ifid, sp->ipv6cp.his_ifid, 6200 sizeof(status->his_ifid)); 6201 SPPP_UNLOCK(sp); 6202 } 6203 break; 6204 default: 6205 { 6206 int ret; 6207 6208 MODULE_HOOK_CALL(sppp_params_50_hook, (sp, cmd, data), 6209 enosys(), ret); 6210 if (ret != ENOSYS) 6211 return ret; 6212 return (EINVAL); 6213 } 6214 } 6215 return (0); 6216 } 6217 6218 static void 6219 sppp_phase_network(struct sppp *sp) 6220 { 6221 int i; 6222 6223 KASSERT(SPPP_WLOCKED(sp)); 6224 6225 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 6226 6227 /* Notify NCPs now. */ 6228 for (i = 0; i < IDX_COUNT; i++) 6229 if ((cps[i])->flags & CP_NCP) 6230 sppp_wq_add(sp->wq_cp, &sp->scp[i].work_open); 6231 } 6232 6233 static const char * 6234 sppp_cp_type_name(u_char type) 6235 { 6236 static char buf[12]; 6237 switch (type) { 6238 case CONF_REQ: return "conf-req"; 6239 case CONF_ACK: return "conf-ack"; 6240 case CONF_NAK: return "conf-nak"; 6241 case CONF_REJ: return "conf-rej"; 6242 case TERM_REQ: return "term-req"; 6243 case TERM_ACK: return "term-ack"; 6244 case CODE_REJ: return "code-rej"; 6245 case PROTO_REJ: return "proto-rej"; 6246 case ECHO_REQ: return "echo-req"; 6247 case ECHO_REPLY: return "echo-reply"; 6248 case DISC_REQ: return "discard-req"; 6249 } 6250 snprintf(buf, sizeof(buf), "0x%x", type); 6251 return buf; 6252 } 6253 6254 static const char * 6255 sppp_auth_type_name(u_short proto, u_char type) 6256 { 6257 static char buf[32]; 6258 const char *name; 6259 6260 switch (proto) { 6261 case PPP_CHAP: 6262 switch (type) { 6263 case CHAP_CHALLENGE: return "challenge"; 6264 case CHAP_RESPONSE: return "response"; 6265 case CHAP_SUCCESS: return "success"; 6266 case CHAP_FAILURE: return "failure"; 6267 default: name = "chap"; break; 6268 } 6269 break; 6270 6271 case PPP_PAP: 6272 switch (type) { 6273 case PAP_REQ: return "req"; 6274 case PAP_ACK: return "ack"; 6275 case PAP_NAK: return "nak"; 6276 default: name = "pap"; break; 6277 } 6278 break; 6279 6280 default: 6281 name = "bad"; 6282 break; 6283 } 6284 6285 snprintf(buf, sizeof(buf), "%s(%#x) %#x", name, proto, type); 6286 return buf; 6287 } 6288 6289 static const char * 6290 sppp_lcp_opt_name(u_char opt) 6291 { 6292 static char buf[12]; 6293 switch (opt) { 6294 case LCP_OPT_MRU: return "mru"; 6295 case LCP_OPT_ASYNC_MAP: return "async-map"; 6296 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 6297 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 6298 case LCP_OPT_MAGIC: return "magic"; 6299 case LCP_OPT_PROTO_COMP: return "proto-comp"; 6300 case LCP_OPT_ADDR_COMP: return "addr-comp"; 6301 case LCP_OPT_SELF_DESC_PAD: return "sdpad"; 6302 case LCP_OPT_CALL_BACK: return "callback"; 6303 case LCP_OPT_COMPOUND_FRMS: return "cmpd-frms"; 6304 case LCP_OPT_MP_MRRU: return "mrru"; 6305 case LCP_OPT_MP_SSNHF: return "mp-ssnhf"; 6306 case LCP_OPT_MP_EID: return "mp-eid"; 6307 } 6308 snprintf(buf, sizeof(buf), "0x%x", opt); 6309 return buf; 6310 } 6311 6312 static const char * 6313 sppp_ipcp_opt_name(u_char opt) 6314 { 6315 static char buf[12]; 6316 switch (opt) { 6317 case IPCP_OPT_ADDRESSES: return "addresses"; 6318 case IPCP_OPT_COMPRESSION: return "compression"; 6319 case IPCP_OPT_ADDRESS: return "address"; 6320 case IPCP_OPT_PRIMDNS: return "primdns"; 6321 case IPCP_OPT_SECDNS: return "secdns"; 6322 } 6323 snprintf(buf, sizeof(buf), "0x%x", opt); 6324 return buf; 6325 } 6326 6327 #ifdef INET6 6328 static const char * 6329 sppp_ipv6cp_opt_name(u_char opt) 6330 { 6331 static char buf[12]; 6332 switch (opt) { 6333 case IPV6CP_OPT_IFID: return "ifid"; 6334 case IPV6CP_OPT_COMPRESSION: return "compression"; 6335 } 6336 snprintf(buf, sizeof(buf), "0x%x", opt); 6337 return buf; 6338 } 6339 #endif 6340 6341 static const char * 6342 sppp_state_name(int state) 6343 { 6344 switch (state) { 6345 case STATE_INITIAL: return "initial"; 6346 case STATE_STARTING: return "starting"; 6347 case STATE_CLOSED: return "closed"; 6348 case STATE_STOPPED: return "stopped"; 6349 case STATE_CLOSING: return "closing"; 6350 case STATE_STOPPING: return "stopping"; 6351 case STATE_REQ_SENT: return "req-sent"; 6352 case STATE_ACK_RCVD: return "ack-rcvd"; 6353 case STATE_ACK_SENT: return "ack-sent"; 6354 case STATE_OPENED: return "opened"; 6355 } 6356 return "illegal"; 6357 } 6358 6359 static const char * 6360 sppp_phase_name(int phase) 6361 { 6362 switch (phase) { 6363 case SPPP_PHASE_DEAD: return "dead"; 6364 case SPPP_PHASE_ESTABLISH: return "establish"; 6365 case SPPP_PHASE_TERMINATE: return "terminate"; 6366 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 6367 case SPPP_PHASE_NETWORK: return "network"; 6368 } 6369 return "illegal"; 6370 } 6371 6372 static const char * 6373 sppp_proto_name(u_short proto) 6374 { 6375 static char buf[12]; 6376 switch (proto) { 6377 case PPP_LCP: return "lcp"; 6378 case PPP_IPCP: return "ipcp"; 6379 case PPP_PAP: return "pap"; 6380 case PPP_CHAP: return "chap"; 6381 case PPP_IPV6CP: return "ipv6cp"; 6382 } 6383 snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto); 6384 return buf; 6385 } 6386 6387 static void 6388 sppp_print_bytes(const u_char *p, u_short len) 6389 { 6390 addlog(" %02x", *p++); 6391 while (--len > 0) 6392 addlog("-%02x", *p++); 6393 } 6394 6395 static void 6396 sppp_print_string(const char *p, u_short len) 6397 { 6398 u_char c; 6399 6400 while (len-- > 0) { 6401 c = *p++; 6402 /* 6403 * Print only ASCII chars directly. RFC 1994 recommends 6404 * using only them, but we don't rely on it. */ 6405 if (c < ' ' || c > '~') 6406 addlog("\\x%x", c); 6407 else 6408 addlog("%c", c); 6409 } 6410 } 6411 6412 static const char * 6413 sppp_dotted_quad(uint32_t addr) 6414 { 6415 static char s[16]; 6416 snprintf(s, sizeof(s), "%d.%d.%d.%d", 6417 (int)((addr >> 24) & 0xff), 6418 (int)((addr >> 16) & 0xff), 6419 (int)((addr >> 8) & 0xff), 6420 (int)(addr & 0xff)); 6421 return s; 6422 } 6423 6424 /* a dummy, used to drop uninteresting events */ 6425 static void 6426 sppp_null(struct sppp *unused) 6427 { 6428 /* do just nothing */ 6429 } 6430 6431 static void 6432 sppp_tls(const struct cp *cp, struct sppp *sp) 6433 { 6434 6435 /* notify lcp that is lower layer */ 6436 sp->lcp.protos |= (1 << cp->protoidx); 6437 6438 if (sp->scp[IDX_LCP].state == STATE_OPENED) 6439 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_up); 6440 } 6441 6442 static void 6443 sppp_tlf(const struct cp *cp, struct sppp *sp) 6444 { 6445 STDDCL; 6446 6447 if (debug) 6448 log(LOG_DEBUG, "%s: %s tlf\n", ifp->if_xname, cp->name); 6449 6450 /* notify lcp that is lower layer */ 6451 sp->lcp.protos &= ~(1 << cp->protoidx); 6452 6453 /* cleanup */ 6454 if (sp->scp[cp->protoidx].rcr_buf != NULL) { 6455 kmem_free(sp->scp[cp->protoidx].rcr_buf, 6456 sp->scp[cp->protoidx].rcr_blen); 6457 } 6458 6459 sp->scp[cp->protoidx].rcr_buf = NULL; 6460 sp->scp[cp->protoidx].rcr_blen = 0; 6461 sp->scp[cp->protoidx].rcr_rlen = 0; 6462 6463 sppp_lcp_check_and_close(sp); 6464 } 6465 6466 static void 6467 sppp_sca_scn(const struct cp *cp, struct sppp *sp) 6468 { 6469 STDDCL; 6470 u_char rconfid, rlen; 6471 int type; 6472 void *buf; 6473 size_t blen; 6474 6475 rconfid = sp->scp[cp->protoidx].rconfid; 6476 buf = sp->scp[cp->protoidx].rcr_buf; 6477 rlen = sp->scp[cp->protoidx].rcr_rlen; 6478 blen = sp->scp[cp->protoidx].rcr_blen; 6479 6480 sp->scp[cp->protoidx].rcr_buf = NULL; 6481 sp->scp[cp->protoidx].rcr_blen = 0; 6482 6483 switch (sp->scp[cp->protoidx].rcr_type) { 6484 case CP_RCR_ACK: 6485 type = CONF_ACK; 6486 break; 6487 case CP_RCR_REJ: 6488 type = CONF_REJ; 6489 break; 6490 case CP_RCR_NAK: 6491 type = CONF_NAK; 6492 break; 6493 default: 6494 type = -1; 6495 break; 6496 } 6497 6498 sp->scp[cp->protoidx].rcr_type = CP_RCR_NONE; 6499 6500 if (buf != NULL) { 6501 if (rlen > 0 && type != -1) { 6502 if (debug) { 6503 log(LOG_DEBUG, "%s: send %s\n", 6504 ifp->if_xname, sppp_cp_type_name(type)); 6505 } 6506 sppp_cp_send(sp, cp->proto, type, rconfid, rlen, buf); 6507 } 6508 kmem_free(buf, blen); 6509 } 6510 } 6511 6512 static void 6513 sppp_ifdown(struct sppp *sp, void *xcp __unused) 6514 { 6515 6516 SPPP_UNLOCK(sp); 6517 if_down(&sp->pp_if); 6518 IF_PURGE(&sp->pp_cpq); 6519 SPPP_LOCK(sp, RW_WRITER); 6520 } 6521 6522 static void 6523 sppp_notify_up(struct sppp *sp) 6524 { 6525 6526 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_up); 6527 } 6528 6529 static void 6530 sppp_notify_down(struct sppp *sp) 6531 { 6532 6533 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_down); 6534 } 6535 6536 static void 6537 sppp_notify_tls_wlocked(struct sppp *sp) 6538 { 6539 6540 KASSERT(SPPP_WLOCKED(sp)); 6541 6542 if (!sp->pp_tls) 6543 return; 6544 6545 SPPP_UNLOCK(sp); 6546 sp->pp_tls(sp); 6547 SPPP_LOCK(sp, RW_WRITER); 6548 } 6549 6550 static void 6551 sppp_notify_tlf_wlocked(struct sppp *sp) 6552 { 6553 6554 KASSERT(SPPP_WLOCKED(sp)); 6555 6556 if (!sp->pp_tlf) 6557 return; 6558 6559 SPPP_UNLOCK(sp); 6560 sp->pp_tlf(sp); 6561 SPPP_LOCK(sp, RW_WRITER); 6562 } 6563 6564 static void 6565 sppp_notify_con(struct sppp *sp) 6566 { 6567 6568 if (!sp->pp_con) 6569 return; 6570 6571 sp->pp_con(sp); 6572 } 6573 6574 #ifdef INET6 6575 static void 6576 sppp_notify_con_wlocked(struct sppp *sp) 6577 { 6578 6579 KASSERT(SPPP_WLOCKED(sp)); 6580 6581 SPPP_UNLOCK(sp); 6582 sppp_notify_con(sp); 6583 SPPP_LOCK(sp, RW_WRITER); 6584 6585 } 6586 #endif 6587 6588 static void 6589 sppp_notify_chg_wlocked(struct sppp *sp) 6590 { 6591 6592 KASSERT(SPPP_WLOCKED(sp)); 6593 6594 if (!sp->pp_chg) 6595 return; 6596 6597 SPPP_UNLOCK(sp); 6598 sp->pp_chg(sp, sp->pp_phase); 6599 SPPP_LOCK(sp, RW_WRITER); 6600 } 6601 6602 static void 6603 sppp_wq_work(struct work *wk, void *xsp) 6604 { 6605 struct sppp *sp; 6606 struct sppp_work *work; 6607 6608 sp = xsp; 6609 work = container_of(wk, struct sppp_work, work); 6610 atomic_cas_uint(&work->state, SPPP_WK_BUSY, SPPP_WK_FREE); 6611 6612 SPPP_LOCK(sp, RW_WRITER); 6613 work->func(sp, work->arg); 6614 SPPP_UNLOCK(sp); 6615 } 6616 6617 static struct workqueue * 6618 sppp_wq_create(struct sppp *sp, const char *xnamebuf, pri_t prio, int ipl, int flags) 6619 { 6620 struct workqueue *wq; 6621 int error; 6622 6623 error = workqueue_create(&wq, xnamebuf, sppp_wq_work, 6624 (void *)sp, prio, ipl, flags); 6625 if (error) { 6626 panic("%s: workqueue_create failed [%s, %d]\n", 6627 sp->pp_if.if_xname, xnamebuf, error); 6628 } 6629 6630 return wq; 6631 } 6632 6633 static void 6634 sppp_wq_destroy(struct sppp *sp __unused, struct workqueue *wq) 6635 { 6636 6637 workqueue_destroy(wq); 6638 } 6639 6640 static void 6641 sppp_wq_set(struct sppp_work *work, 6642 void (*func)(struct sppp *, void *), void *arg) 6643 { 6644 6645 work->func = func; 6646 work->arg = arg; 6647 } 6648 6649 static void 6650 sppp_wq_add(struct workqueue *wq, struct sppp_work *work) 6651 { 6652 6653 if (atomic_cas_uint(&work->state, SPPP_WK_FREE, SPPP_WK_BUSY) 6654 != SPPP_WK_FREE) 6655 return; 6656 6657 KASSERT(work->func != NULL); 6658 kpreempt_disable(); 6659 workqueue_enqueue(wq, &work->work, NULL); 6660 kpreempt_enable(); 6661 } 6662 static void 6663 sppp_wq_wait(struct workqueue *wq, struct sppp_work *work) 6664 { 6665 6666 atomic_swap_uint(&work->state, SPPP_WK_UNAVAIL); 6667 workqueue_wait(wq, &work->work); 6668 } 6669 6670 /* 6671 * This file is large. Tell emacs to highlight it nevertheless. 6672 * 6673 * Local Variables: 6674 * hilit-auto-highlight-maxout: 120000 6675 * End: 6676 */ 6677 6678 /* 6679 * Module glue 6680 */ 6681 MODULE(MODULE_CLASS_MISC, sppp_subr, NULL); 6682 6683 static int 6684 sppp_subr_modcmd(modcmd_t cmd, void *arg) 6685 { 6686 6687 switch (cmd) { 6688 case MODULE_CMD_INIT: 6689 case MODULE_CMD_FINI: 6690 return 0; 6691 case MODULE_CMD_STAT: 6692 case MODULE_CMD_AUTOUNLOAD: 6693 default: 6694 return ENOTTY; 6695 } 6696 } 6697
Indexes created Fri Sep 26 08:10:20 GMT 2025