if_spppsubr.c revision 1.190.2.1
1 /* $NetBSD: if_spppsubr.c,v 1.190.2.1 2020/12/14 14:38:15 thorpej 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 1.190.2.1 2020/12/14 14:38:15 thorpej 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_LOCK(sp, RW_WRITER); 1078 1079 sppp_cp_fini(&lcp, sp); 1080 sppp_cp_fini(&ipcp, sp); 1081 sppp_cp_fini(&pap, sp); 1082 sppp_cp_fini(&chap, sp); 1083 #ifdef INET6 1084 sppp_cp_fini(&ipv6cp, sp); 1085 #endif 1086 sppp_wq_destroy(sp, sp->wq_cp); 1087 1088 /* free authentication info */ 1089 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 1090 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 1091 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 1092 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 1093 SPPP_UNLOCK(sp); 1094 rw_destroy(&sp->pp_lock); 1095 } 1096 1097 /* 1098 * Flush the interface output queue. 1099 */ 1100 void 1101 sppp_flush(struct ifnet *ifp) 1102 { 1103 struct sppp *sp = (struct sppp *) ifp; 1104 1105 SPPP_LOCK(sp, RW_WRITER); 1106 IFQ_PURGE(&sp->pp_if.if_snd); 1107 IF_PURGE(&sp->pp_fastq); 1108 IF_PURGE(&sp->pp_cpq); 1109 SPPP_UNLOCK(sp); 1110 } 1111 1112 /* 1113 * Check if the output queue is empty. 1114 */ 1115 int 1116 sppp_isempty(struct ifnet *ifp) 1117 { 1118 struct sppp *sp = (struct sppp *) ifp; 1119 int empty, s; 1120 1121 s = splnet(); 1122 SPPP_LOCK(sp, RW_READER); 1123 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1124 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1125 SPPP_UNLOCK(sp); 1126 splx(s); 1127 return (empty); 1128 } 1129 1130 /* 1131 * Get next packet to send. 1132 */ 1133 struct mbuf * 1134 sppp_dequeue(struct ifnet *ifp) 1135 { 1136 struct sppp *sp = (struct sppp *) ifp; 1137 struct mbuf *m; 1138 int s; 1139 1140 s = splnet(); 1141 SPPP_LOCK(sp, RW_WRITER); 1142 /* 1143 * Process only the control protocol queue until we have at 1144 * least one NCP open. 1145 * 1146 * Do always serve all three queues in Cisco mode. 1147 */ 1148 IF_DEQUEUE(&sp->pp_cpq, m); 1149 if (m == NULL && 1150 (sppp_cp_check(sp, CP_NCP) || (sp->pp_flags & PP_CISCO) != 0)) { 1151 IF_DEQUEUE(&sp->pp_fastq, m); 1152 if (m == NULL) 1153 IFQ_DEQUEUE(&sp->pp_if.if_snd, m); 1154 } 1155 SPPP_UNLOCK(sp); 1156 splx(s); 1157 return m; 1158 } 1159 1160 /* 1161 * Process an ioctl request. Called on low priority level. 1162 */ 1163 int 1164 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1165 { 1166 struct lwp *l = curlwp; /* XXX */ 1167 struct ifreq *ifr = (struct ifreq *) data; 1168 struct ifaddr *ifa = (struct ifaddr *) data; 1169 struct sppp *sp = (struct sppp *) ifp; 1170 int s, error=0, going_up, going_down; 1171 u_short newmode; 1172 1173 s = splnet(); 1174 switch (cmd) { 1175 case SIOCINITIFADDR: 1176 ifa->ifa_rtrequest = p2p_rtrequest; 1177 break; 1178 1179 case SIOCSIFFLAGS: 1180 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1181 break; 1182 1183 SPPP_LOCK(sp, RW_WRITER); 1184 going_up = ifp->if_flags & IFF_UP && 1185 (ifp->if_flags & IFF_RUNNING) == 0; 1186 going_down = (ifp->if_flags & IFF_UP) == 0 && 1187 ifp->if_flags & IFF_RUNNING; 1188 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1189 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1190 /* sanity */ 1191 newmode = IFF_PASSIVE; 1192 ifp->if_flags &= ~IFF_AUTO; 1193 } 1194 1195 if (going_up || going_down) { 1196 sp->lcp.reestablish = false; 1197 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 1198 } 1199 if (going_up && newmode == 0) { 1200 /* neither auto-dial nor passive */ 1201 ifp->if_flags |= IFF_RUNNING; 1202 if (!(sp->pp_flags & PP_CISCO)) { 1203 sppp_wq_add(sp->wq_cp, 1204 &sp->scp[IDX_LCP].work_open); 1205 } 1206 } else if (going_down) { 1207 SPPP_UNLOCK(sp); 1208 sppp_flush(ifp); 1209 SPPP_LOCK(sp, RW_WRITER); 1210 1211 ifp->if_flags &= ~IFF_RUNNING; 1212 } 1213 SPPP_UNLOCK(sp); 1214 break; 1215 1216 case SIOCSIFMTU: 1217 if (ifr->ifr_mtu < PPP_MINMRU || 1218 ifr->ifr_mtu > sp->lcp.their_mru) { 1219 error = EINVAL; 1220 break; 1221 } 1222 /*FALLTHROUGH*/ 1223 case SIOCGIFMTU: 1224 if ((error = ifioctl_common(ifp, cmd, data)) == ENETRESET) 1225 error = 0; 1226 break; 1227 case SIOCADDMULTI: 1228 case SIOCDELMULTI: 1229 break; 1230 1231 case SPPPSETAUTHCFG: 1232 case SPPPSETLCPCFG: 1233 case SPPPSETIDLETO: 1234 case SPPPSETAUTHFAILURE: 1235 case SPPPSETDNSOPTS: 1236 case SPPPSETKEEPALIVE: 1237 #if defined(COMPAT_50) || defined(MODULAR) 1238 case __SPPPSETIDLETO50: 1239 case __SPPPSETKEEPALIVE50: 1240 #endif /* COMPAT_50 || MODULAR */ 1241 error = kauth_authorize_network(l->l_cred, 1242 KAUTH_NETWORK_INTERFACE, 1243 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, 1244 NULL); 1245 if (error) 1246 break; 1247 error = sppp_params(sp, cmd, data); 1248 break; 1249 1250 case SPPPGETAUTHCFG: 1251 case SPPPGETLCPCFG: 1252 case SPPPGETAUTHFAILURES: 1253 error = kauth_authorize_network(l->l_cred, 1254 KAUTH_NETWORK_INTERFACE, 1255 KAUTH_REQ_NETWORK_INTERFACE_GETPRIV, ifp, (void *)cmd, 1256 NULL); 1257 if (error) 1258 break; 1259 error = sppp_params(sp, cmd, data); 1260 break; 1261 1262 case SPPPGETSTATUS: 1263 case SPPPGETSTATUSNCP: 1264 case SPPPGETIDLETO: 1265 case SPPPGETDNSOPTS: 1266 case SPPPGETDNSADDRS: 1267 case SPPPGETKEEPALIVE: 1268 #if defined(COMPAT_50) || defined(MODULAR) 1269 case __SPPPGETIDLETO50: 1270 case __SPPPGETKEEPALIVE50: 1271 #endif /* COMPAT_50 || MODULAR */ 1272 case SPPPGETLCPSTATUS: 1273 case SPPPGETIPCPSTATUS: 1274 case SPPPGETIPV6CPSTATUS: 1275 error = sppp_params(sp, cmd, data); 1276 break; 1277 1278 default: 1279 error = ifioctl_common(ifp, cmd, data); 1280 break; 1281 } 1282 splx(s); 1283 return (error); 1284 } 1285 1286 /* 1287 * Cisco framing implementation. 1288 */ 1289 1290 /* 1291 * Handle incoming Cisco keepalive protocol packets. 1292 */ 1293 static void 1294 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1295 { 1296 STDDCL; 1297 struct cisco_packet *h; 1298 #ifdef INET 1299 uint32_t me, mymask = 0; /* XXX: GCC */ 1300 #endif 1301 1302 SPPP_LOCK(sp, RW_WRITER); 1303 1304 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1305 if (debug) 1306 log(LOG_DEBUG, 1307 "%s: cisco invalid packet length: %d bytes\n", 1308 ifp->if_xname, m->m_pkthdr.len); 1309 SPPP_UNLOCK(sp); 1310 return; 1311 } 1312 h = mtod(m, struct cisco_packet *); 1313 if (debug) 1314 log(LOG_DEBUG, 1315 "%s: cisco input: %d bytes " 1316 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1317 ifp->if_xname, m->m_pkthdr.len, 1318 ntohl(h->type), h->par1, h->par2, (u_int)h->rel, 1319 (u_int)h->time0, (u_int)h->time1); 1320 switch (ntohl(h->type)) { 1321 default: 1322 if (debug) 1323 addlog("%s: cisco unknown packet type: 0x%x\n", 1324 ifp->if_xname, ntohl(h->type)); 1325 break; 1326 case CISCO_ADDR_REPLY: 1327 /* Reply on address request, ignore */ 1328 break; 1329 case CISCO_KEEPALIVE_REQ: 1330 sp->pp_alivecnt = 0; 1331 sp->scp[IDX_LCP].rseq = ntohl(h->par1); 1332 if (sp->scp[IDX_LCP].seq == sp->scp[IDX_LCP].rseq) { 1333 /* Local and remote sequence numbers are equal. 1334 * Probably, the line is in loopback mode. */ 1335 if (sp->pp_loopcnt >= LOOPALIVECNT) { 1336 printf ("%s: loopback\n", 1337 ifp->if_xname); 1338 sp->pp_loopcnt = 0; 1339 if (ifp->if_flags & IFF_UP) { 1340 SPPP_UNLOCK(sp); 1341 if_down(ifp); 1342 SPPP_LOCK(sp, RW_WRITER); 1343 1344 IF_PURGE(&sp->pp_cpq); 1345 } 1346 } 1347 ++sp->pp_loopcnt; 1348 1349 /* Generate new local sequence number */ 1350 sp->scp[IDX_LCP].seq = cprng_fast32(); 1351 break; 1352 } 1353 sp->pp_loopcnt = 0; 1354 if (! (ifp->if_flags & IFF_UP) && 1355 (ifp->if_flags & IFF_RUNNING)) { 1356 SPPP_UNLOCK(sp); 1357 if_up(ifp); 1358 SPPP_LOCK(sp, RW_WRITER); 1359 } 1360 break; 1361 case CISCO_ADDR_REQ: 1362 #ifdef INET 1363 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1364 if (me != 0L) 1365 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1366 #endif 1367 break; 1368 } 1369 SPPP_UNLOCK(sp); 1370 } 1371 1372 /* 1373 * Send Cisco keepalive packet. 1374 */ 1375 static void 1376 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1377 { 1378 STDDCL; 1379 struct ppp_header *h; 1380 struct cisco_packet *ch; 1381 struct mbuf *m; 1382 uint32_t t; 1383 1384 KASSERT(SPPP_WLOCKED(sp)); 1385 1386 t = time_uptime * 1000; 1387 MGETHDR(m, M_DONTWAIT, MT_DATA); 1388 if (! m) 1389 return; 1390 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1391 m_reset_rcvif(m); 1392 1393 h = mtod(m, struct ppp_header *); 1394 h->address = CISCO_MULTICAST; 1395 h->control = 0; 1396 h->protocol = htons(CISCO_KEEPALIVE); 1397 1398 ch = (struct cisco_packet *)(h + 1); 1399 ch->type = htonl(type); 1400 ch->par1 = htonl(par1); 1401 ch->par2 = htonl(par2); 1402 ch->rel = -1; 1403 1404 ch->time0 = htons((u_short)(t >> 16)); 1405 ch->time1 = htons((u_short) t); 1406 1407 if (debug) 1408 log(LOG_DEBUG, 1409 "%s: cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1410 ifp->if_xname, ntohl(ch->type), ch->par1, 1411 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1412 (u_int)ch->time1); 1413 1414 if (IF_QFULL(&sp->pp_cpq)) { 1415 IF_DROP(&sp->pp_fastq); 1416 IF_DROP(&ifp->if_snd); 1417 m_freem(m); 1418 if_statinc(ifp, if_oerrors); 1419 return; 1420 } 1421 1422 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 1423 IF_ENQUEUE(&sp->pp_cpq, m); 1424 1425 if (! (ifp->if_flags & IFF_OACTIVE)) { 1426 SPPP_UNLOCK(sp); 1427 if_start_lock(ifp); 1428 SPPP_LOCK(sp, RW_WRITER); 1429 } 1430 } 1431 1432 /* 1433 * PPP protocol implementation. 1434 */ 1435 1436 /* 1437 * Send PPP control protocol packet. 1438 */ 1439 static void 1440 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1441 u_char ident, u_short len, void *data) 1442 { 1443 STDDCL; 1444 struct lcp_header *lh; 1445 struct mbuf *m; 1446 size_t pkthdrlen; 1447 1448 KASSERT(SPPP_WLOCKED(sp)); 1449 1450 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1451 1452 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1453 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1454 MGETHDR(m, M_DONTWAIT, MT_DATA); 1455 if (! m) { 1456 return; 1457 } 1458 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1459 m_reset_rcvif(m); 1460 1461 if (sp->pp_flags & PP_NOFRAMING) { 1462 *mtod(m, uint16_t *) = htons(proto); 1463 lh = (struct lcp_header *)(mtod(m, uint8_t *) + 2); 1464 } else { 1465 struct ppp_header *h; 1466 h = mtod(m, struct ppp_header *); 1467 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1468 h->control = PPP_UI; /* Unnumbered Info */ 1469 h->protocol = htons(proto); /* Link Control Protocol */ 1470 lh = (struct lcp_header *)(h + 1); 1471 } 1472 lh->type = type; 1473 lh->ident = ident; 1474 lh->len = htons(LCP_HEADER_LEN + len); 1475 if (len) 1476 memcpy(lh + 1, data, len); 1477 1478 if (debug) { 1479 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 1480 ifp->if_xname, 1481 sppp_proto_name(proto), 1482 sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len)); 1483 if (len) 1484 sppp_print_bytes((u_char *)(lh + 1), len); 1485 addlog(">\n"); 1486 } 1487 if (IF_QFULL(&sp->pp_cpq)) { 1488 IF_DROP(&sp->pp_fastq); 1489 IF_DROP(&ifp->if_snd); 1490 m_freem(m); 1491 if_statinc(ifp, if_oerrors); 1492 return; 1493 } 1494 1495 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 1496 IF_ENQUEUE(&sp->pp_cpq, m); 1497 1498 if (! (ifp->if_flags & IFF_OACTIVE)) { 1499 SPPP_UNLOCK(sp); 1500 if_start_lock(ifp); 1501 SPPP_LOCK(sp, RW_WRITER); 1502 } 1503 } 1504 1505 static void 1506 sppp_cp_to_lcp(void *xsp) 1507 { 1508 struct sppp *sp = xsp; 1509 1510 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_to); 1511 } 1512 1513 static void 1514 sppp_cp_to_ipcp(void *xsp) 1515 { 1516 struct sppp *sp = xsp; 1517 1518 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_IPCP].work_to); 1519 } 1520 1521 static void 1522 sppp_cp_to_ipv6cp(void *xsp) 1523 { 1524 struct sppp *sp = xsp; 1525 1526 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_IPV6CP].work_to); 1527 } 1528 1529 static void 1530 sppp_cp_to_pap(void *xsp) 1531 { 1532 struct sppp *sp = xsp; 1533 1534 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_to); 1535 } 1536 1537 static void 1538 sppp_cp_to_chap(void *xsp) 1539 { 1540 struct sppp *sp = xsp; 1541 1542 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_to); 1543 } 1544 1545 static void 1546 sppp_cp_init(const struct cp *cp, struct sppp *sp) 1547 { 1548 struct sppp_cp *scp; 1549 typedef void (*sppp_co_cb_t)(void *); 1550 static const sppp_co_cb_t to_cb[IDX_COUNT] = { 1551 [IDX_LCP] = sppp_cp_to_lcp, 1552 [IDX_IPCP] = sppp_cp_to_ipcp, 1553 [IDX_IPV6CP] = sppp_cp_to_ipv6cp, 1554 [IDX_PAP] = sppp_cp_to_pap, 1555 [IDX_CHAP] = sppp_cp_to_chap, 1556 }; 1557 1558 scp = &sp->scp[cp->protoidx]; 1559 scp->state = STATE_INITIAL; 1560 scp->fail_counter = 0; 1561 scp->seq = 0; 1562 scp->rseq = 0; 1563 1564 SPPP_WQ_SET(&scp->work_up, cp->Up, cp); 1565 SPPP_WQ_SET(&scp->work_down, cp->Down, cp); 1566 SPPP_WQ_SET(&scp->work_open, cp->Open, cp); 1567 SPPP_WQ_SET(&scp->work_close, cp->Close, cp); 1568 SPPP_WQ_SET(&scp->work_to, cp->TO, cp); 1569 SPPP_WQ_SET(&scp->work_rcr, sppp_rcr_event, cp); 1570 SPPP_WQ_SET(&scp->work_rca, sppp_rca_event, cp); 1571 SPPP_WQ_SET(&scp->work_rcn, sppp_rcn_event, cp); 1572 SPPP_WQ_SET(&scp->work_rtr, sppp_rtr_event, cp); 1573 SPPP_WQ_SET(&scp->work_rta, sppp_rta_event, cp); 1574 SPPP_WQ_SET(&scp->work_rxj, sppp_rxj_event, cp); 1575 1576 callout_init(&scp->ch, CALLOUT_MPSAFE); 1577 callout_setfunc(&scp->ch, to_cb[cp->protoidx], sp); 1578 } 1579 1580 static void 1581 sppp_cp_fini(const struct cp *cp, struct sppp *sp) 1582 { 1583 struct sppp_cp *scp; 1584 scp = &sp->scp[cp->protoidx]; 1585 1586 sppp_wq_wait(sp->wq_cp, &scp->work_up); 1587 sppp_wq_wait(sp->wq_cp, &scp->work_down); 1588 sppp_wq_wait(sp->wq_cp, &scp->work_open); 1589 sppp_wq_wait(sp->wq_cp, &scp->work_close); 1590 sppp_wq_wait(sp->wq_cp, &scp->work_to); 1591 sppp_wq_wait(sp->wq_cp, &scp->work_rcr); 1592 sppp_wq_wait(sp->wq_cp, &scp->work_rca); 1593 sppp_wq_wait(sp->wq_cp, &scp->work_rcn); 1594 sppp_wq_wait(sp->wq_cp, &scp->work_rtr); 1595 sppp_wq_wait(sp->wq_cp, &scp->work_rta); 1596 sppp_wq_wait(sp->wq_cp, &scp->work_rxj); 1597 1598 callout_halt(&scp->ch, NULL); 1599 callout_destroy(&scp->ch); 1600 } 1601 1602 /* 1603 * Handle incoming PPP control protocol packets. 1604 */ 1605 static void 1606 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1607 { 1608 STDDCL; 1609 struct lcp_header *h; 1610 int printlen, len = m->m_pkthdr.len; 1611 enum cp_rcr_type type; 1612 size_t blen, rlen; 1613 u_char *p; 1614 uint32_t u32; 1615 uint8_t *buf; 1616 1617 SPPP_LOCK(sp, RW_WRITER); 1618 1619 if (len < 4) { 1620 if (debug) 1621 log(LOG_DEBUG, 1622 "%s: %s invalid packet length: %d bytes\n", 1623 ifp->if_xname, cp->name, len); 1624 SPPP_UNLOCK(sp); 1625 return; 1626 } 1627 h = mtod(m, struct lcp_header *); 1628 if (debug) { 1629 printlen = ntohs(h->len); 1630 log(LOG_DEBUG, 1631 "%s: %s input(%s): <%s id=0x%x len=%d", 1632 ifp->if_xname, cp->name, 1633 sppp_state_name(sp->scp[cp->protoidx].state), 1634 sppp_cp_type_name(h->type), h->ident, printlen); 1635 if (len < printlen) 1636 printlen = len; 1637 if (printlen > 4) 1638 sppp_print_bytes((u_char *)(h + 1), printlen - 4); 1639 addlog(">\n"); 1640 } 1641 if (len > ntohs(h->len)) 1642 len = ntohs(h->len); 1643 p = (u_char *)(h + 1); 1644 switch (h->type) { 1645 case CONF_REQ: 1646 if (len < 4) { 1647 if (debug) 1648 addlog("%s: %s invalid conf-req length %d\n", 1649 ifp->if_xname, cp->name, 1650 len); 1651 if_statinc(ifp, if_ierrors); 1652 break; 1653 } 1654 1655 buf = NULL; 1656 blen = 0; 1657 rlen = 0; 1658 1659 type = (cp->parse_confreq)(sp, h, len, 1660 &buf, &blen, &rlen); 1661 1662 if (type == CP_RCR_ERR) { 1663 /* fatal error, shut down */ 1664 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 1665 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 1666 } else if (buf != NULL) { 1667 if (sp->scp[cp->protoidx].rcr_buf != NULL) { 1668 kmem_intr_free(sp->scp[cp->protoidx].rcr_buf, 1669 sp->scp[cp->protoidx].rcr_blen); 1670 } 1671 1672 sp->scp[cp->protoidx].rcr_buf = (void *)buf; 1673 buf = NULL; 1674 1675 sp->scp[cp->protoidx].rcr_blen = blen; 1676 sp->scp[cp->protoidx].rcr_rlen = rlen; 1677 sp->scp[cp->protoidx].rcr_type = type; 1678 sp->scp[cp->protoidx].rconfid = h->ident; 1679 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rcr); 1680 } 1681 break; 1682 case CONF_ACK: 1683 if (h->ident != sp->scp[cp->protoidx].confid) { 1684 if (debug) 1685 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1686 ifp->if_xname, cp->name, 1687 h->ident, sp->scp[cp->protoidx].confid); 1688 if_statinc(ifp, if_ierrors); 1689 break; 1690 } 1691 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rca); 1692 break; 1693 case CONF_NAK: 1694 case CONF_REJ: 1695 if (h->ident != sp->scp[cp->protoidx].confid) { 1696 if (debug) 1697 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1698 ifp->if_xname, cp->name, 1699 h->ident, sp->scp[cp->protoidx].confid); 1700 if_statinc(ifp, if_ierrors); 1701 break; 1702 } 1703 if (h->type == CONF_NAK) 1704 (cp->parse_confnak)(sp, h, len); 1705 else /* CONF_REJ */ 1706 (cp->parse_confrej)(sp, h, len); 1707 1708 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rcn); 1709 break; 1710 1711 case TERM_REQ: 1712 sp->scp[cp->protoidx].rseq = h->ident; 1713 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rtr); 1714 break; 1715 case TERM_ACK: 1716 if (h->ident != sp->scp[cp->protoidx].confid && 1717 h->ident != sp->scp[cp->protoidx].seq) { 1718 if (debug) 1719 addlog("%s: %s id mismatch " 1720 "0x%x != 0x%x and 0x%x != %0lx\n", 1721 ifp->if_xname, cp->name, 1722 h->ident, sp->scp[cp->protoidx].confid, 1723 h->ident, sp->scp[cp->protoidx].seq); 1724 if_statinc(ifp, if_ierrors); 1725 break; 1726 } 1727 1728 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rta); 1729 break; 1730 case CODE_REJ: 1731 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1732 log(LOG_INFO, 1733 "%s: %s: ignoring RXJ (%s) for code ?, " 1734 "danger will robinson\n", 1735 ifp->if_xname, cp->name, 1736 sppp_cp_type_name(h->type)); 1737 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rxj); 1738 break; 1739 case PROTO_REJ: 1740 { 1741 int catastrophic; 1742 const struct cp *upper; 1743 int i; 1744 uint16_t proto; 1745 1746 catastrophic = 0; 1747 upper = NULL; 1748 proto = p[0] << 8 | p[1]; 1749 for (i = 0; i < IDX_COUNT; i++) { 1750 if (cps[i]->proto == proto) { 1751 upper = cps[i]; 1752 break; 1753 } 1754 } 1755 if (upper == NULL) 1756 catastrophic++; 1757 1758 if (debug) 1759 log(LOG_INFO, 1760 "%s: %s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1761 ifp->if_xname, cp->name, catastrophic ? '-' : '+', 1762 sppp_cp_type_name(h->type), proto, 1763 upper ? upper->name : "unknown", 1764 upper ? sppp_state_name(sp->scp[upper->protoidx].state) : "?"); 1765 1766 /* 1767 * if we got RXJ+ against conf-req, the peer does not implement 1768 * this particular protocol type. terminate the protocol. 1769 */ 1770 if (upper && !catastrophic) { 1771 if (sp->scp[upper->protoidx].state == STATE_REQ_SENT) { 1772 sppp_wq_add(sp->wq_cp, 1773 &sp->scp[upper->protoidx].work_close); 1774 break; 1775 } 1776 } 1777 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rxj); 1778 break; 1779 } 1780 case DISC_REQ: 1781 if (cp->proto != PPP_LCP) 1782 goto illegal; 1783 /* Discard the packet. */ 1784 break; 1785 case ECHO_REQ: 1786 if (cp->proto != PPP_LCP) 1787 goto illegal; 1788 if (sp->scp[cp->protoidx].state != STATE_OPENED) { 1789 if (debug) 1790 addlog("%s: lcp echo req but lcp closed\n", 1791 ifp->if_xname); 1792 if_statinc(ifp, if_ierrors); 1793 break; 1794 } 1795 if (len < 8) { 1796 if (debug) 1797 addlog("%s: invalid lcp echo request " 1798 "packet length: %d bytes\n", 1799 ifp->if_xname, len); 1800 break; 1801 } 1802 memcpy(&u32, h + 1, sizeof u32); 1803 if (ntohl(u32) == sp->lcp.magic) { 1804 /* Line loopback mode detected. */ 1805 printf("%s: loopback\n", ifp->if_xname); 1806 SPPP_UNLOCK(sp); 1807 if_down(ifp); 1808 SPPP_LOCK(sp, RW_WRITER); 1809 1810 IF_PURGE(&sp->pp_cpq); 1811 1812 /* Shut down the PPP link. */ 1813 /* XXX */ 1814 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_down); 1815 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_up); 1816 break; 1817 } 1818 u32 = htonl(sp->lcp.magic); 1819 memcpy(h + 1, &u32, sizeof u32); 1820 if (debug) 1821 addlog("%s: got lcp echo req, sending echo rep\n", 1822 ifp->if_xname); 1823 sppp_cp_send(sp, PPP_LCP, ECHO_REPLY, h->ident, len - 4, 1824 h + 1); 1825 break; 1826 case ECHO_REPLY: 1827 if (cp->proto != PPP_LCP) 1828 goto illegal; 1829 if (h->ident != sp->lcp.echoid) { 1830 if_statinc(ifp, if_ierrors); 1831 break; 1832 } 1833 if (len < 8) { 1834 if (debug) 1835 addlog("%s: lcp invalid echo reply " 1836 "packet length: %d bytes\n", 1837 ifp->if_xname, len); 1838 break; 1839 } 1840 if (debug) 1841 addlog("%s: lcp got echo rep\n", 1842 ifp->if_xname); 1843 memcpy(&u32, h + 1, sizeof u32); 1844 if (ntohl(u32) != sp->lcp.magic) 1845 sp->pp_alivecnt = 0; 1846 break; 1847 default: 1848 /* Unknown packet type -- send Code-Reject packet. */ 1849 illegal: 1850 if (debug) 1851 addlog("%s: %s send code-rej for 0x%x\n", 1852 ifp->if_xname, cp->name, h->type); 1853 sppp_cp_send(sp, cp->proto, CODE_REJ, 1854 ++sp->scp[cp->protoidx].seq, m->m_pkthdr.len, h); 1855 if_statinc(ifp, if_ierrors); 1856 } 1857 1858 SPPP_UNLOCK(sp); 1859 } 1860 1861 /* 1862 * The generic part of all Up/Down/Open/Close/TO event handlers. 1863 * Basically, the state transition handling in the automaton. 1864 */ 1865 static void 1866 sppp_up_event(struct sppp *sp, void *xcp) 1867 { 1868 const struct cp *cp = xcp; 1869 STDDCL; 1870 1871 KASSERT(SPPP_WLOCKED(sp)); 1872 KASSERT(!cpu_softintr_p()); 1873 1874 if ((cp->flags & CP_AUTH) != 0 && 1875 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1876 return; 1877 1878 if (debug) 1879 log(LOG_DEBUG, "%s: %s up(%s)\n", 1880 ifp->if_xname, cp->name, 1881 sppp_state_name(sp->scp[cp->protoidx].state)); 1882 1883 switch (sp->scp[cp->protoidx].state) { 1884 case STATE_INITIAL: 1885 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1886 break; 1887 case STATE_STARTING: 1888 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 1889 (cp->scr)(sp); 1890 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1891 break; 1892 default: 1893 printf("%s: %s illegal up in state %s\n", 1894 ifp->if_xname, cp->name, 1895 sppp_state_name(sp->scp[cp->protoidx].state)); 1896 } 1897 } 1898 1899 static void 1900 sppp_down_event(struct sppp *sp, void *xcp) 1901 { 1902 const struct cp *cp = xcp; 1903 STDDCL; 1904 1905 KASSERT(SPPP_WLOCKED(sp)); 1906 KASSERT(!cpu_softintr_p()); 1907 1908 if ((cp->flags & CP_AUTH) != 0 && 1909 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1910 return; 1911 1912 if (debug) 1913 log(LOG_DEBUG, "%s: %s down(%s)\n", 1914 ifp->if_xname, cp->name, 1915 sppp_state_name(sp->scp[cp->protoidx].state)); 1916 1917 switch (sp->scp[cp->protoidx].state) { 1918 case STATE_CLOSED: 1919 case STATE_CLOSING: 1920 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1921 break; 1922 case STATE_STOPPED: 1923 (cp->tls)(cp, sp); 1924 /* fall through */ 1925 case STATE_STOPPING: 1926 case STATE_REQ_SENT: 1927 case STATE_ACK_RCVD: 1928 case STATE_ACK_SENT: 1929 sppp_cp_change_state(cp, sp, STATE_STARTING); 1930 break; 1931 case STATE_OPENED: 1932 (cp->tld)(sp); 1933 sppp_cp_change_state(cp, sp, STATE_STARTING); 1934 break; 1935 default: 1936 printf("%s: %s illegal down in state %s\n", 1937 ifp->if_xname, cp->name, 1938 sppp_state_name(sp->scp[cp->protoidx].state)); 1939 } 1940 } 1941 1942 static void 1943 sppp_open_event(struct sppp *sp, void *xcp) 1944 { 1945 const struct cp *cp = xcp; 1946 STDDCL; 1947 1948 KASSERT(SPPP_WLOCKED(sp)); 1949 KASSERT(!cpu_softintr_p()); 1950 1951 if ((cp->flags & CP_AUTH) != 0 && 1952 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1953 return; 1954 1955 if (debug) 1956 log(LOG_DEBUG, "%s: %s open(%s)\n", 1957 ifp->if_xname, cp->name, 1958 sppp_state_name(sp->scp[cp->protoidx].state)); 1959 1960 switch (sp->scp[cp->protoidx].state) { 1961 case STATE_INITIAL: 1962 sppp_cp_change_state(cp, sp, STATE_STARTING); 1963 (cp->tls)(cp, sp); 1964 break; 1965 case STATE_STARTING: 1966 break; 1967 case STATE_CLOSED: 1968 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 1969 (cp->scr)(sp); 1970 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1971 break; 1972 case STATE_STOPPED: 1973 case STATE_STOPPING: 1974 case STATE_REQ_SENT: 1975 case STATE_ACK_RCVD: 1976 case STATE_ACK_SENT: 1977 case STATE_OPENED: 1978 break; 1979 case STATE_CLOSING: 1980 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1981 break; 1982 } 1983 } 1984 1985 static void 1986 sppp_close_event(struct sppp *sp, void *xcp) 1987 { 1988 const struct cp *cp = xcp; 1989 STDDCL; 1990 1991 KASSERT(SPPP_WLOCKED(sp)); 1992 KASSERT(!cpu_softintr_p()); 1993 1994 if ((cp->flags & CP_AUTH) != 0 && 1995 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1996 return; 1997 1998 if (debug) 1999 log(LOG_DEBUG, "%s: %s close(%s)\n", 2000 ifp->if_xname, cp->name, 2001 sppp_state_name(sp->scp[cp->protoidx].state)); 2002 2003 switch (sp->scp[cp->protoidx].state) { 2004 case STATE_INITIAL: 2005 case STATE_CLOSED: 2006 case STATE_CLOSING: 2007 break; 2008 case STATE_STARTING: 2009 sppp_cp_change_state(cp, sp, STATE_INITIAL); 2010 (cp->tlf)(cp, sp); 2011 break; 2012 case STATE_STOPPED: 2013 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2014 break; 2015 case STATE_STOPPING: 2016 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2017 break; 2018 case STATE_OPENED: 2019 (cp->tld)(sp); 2020 /* fall through */ 2021 case STATE_REQ_SENT: 2022 case STATE_ACK_RCVD: 2023 case STATE_ACK_SENT: 2024 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_terminate; 2025 if ((cp->flags & CP_AUTH) == 0) { 2026 sppp_cp_send(sp, cp->proto, TERM_REQ, 2027 ++sp->scp[cp->protoidx].seq, 0, 0); 2028 } 2029 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2030 break; 2031 } 2032 } 2033 2034 static void 2035 sppp_to_event(struct sppp *sp, void *xcp) 2036 { 2037 const struct cp *cp = xcp; 2038 int s; 2039 STDDCL; 2040 2041 KASSERT(SPPP_WLOCKED(sp)); 2042 KASSERT(!cpu_softintr_p()); 2043 2044 s = splnet(); 2045 2046 if (debug) 2047 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 2048 ifp->if_xname, cp->name, 2049 sppp_state_name(sp->scp[cp->protoidx].state), 2050 sp->scp[cp->protoidx].rst_counter); 2051 2052 if (--sp->scp[cp->protoidx].rst_counter < 0) 2053 /* TO- event */ 2054 switch (sp->scp[cp->protoidx].state) { 2055 case STATE_CLOSING: 2056 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2057 (cp->tlf)(cp, sp); 2058 break; 2059 case STATE_STOPPING: 2060 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2061 (cp->tlf)(cp, sp); 2062 break; 2063 case STATE_REQ_SENT: 2064 case STATE_ACK_RCVD: 2065 case STATE_ACK_SENT: 2066 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2067 (cp->tlf)(cp, sp); 2068 break; 2069 } 2070 else 2071 /* TO+ event */ 2072 switch (sp->scp[cp->protoidx].state) { 2073 case STATE_CLOSING: 2074 case STATE_STOPPING: 2075 if ((cp->flags & CP_AUTH) == 0) { 2076 sppp_cp_send(sp, cp->proto, TERM_REQ, 2077 ++sp->scp[cp->protoidx].seq, 0, 0); 2078 } 2079 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2080 break; 2081 case STATE_REQ_SENT: 2082 case STATE_ACK_RCVD: 2083 (cp->scr)(sp); 2084 /* sppp_cp_change_state() will restart the timer */ 2085 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2086 break; 2087 case STATE_ACK_SENT: 2088 (cp->scr)(sp); 2089 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2090 break; 2091 } 2092 2093 splx(s); 2094 } 2095 2096 static void 2097 sppp_rcr_event(struct sppp *sp, void *xcp) 2098 { 2099 const struct cp *cp = xcp; 2100 enum cp_rcr_type type; 2101 void *buf; 2102 size_t blen; 2103 STDDCL; 2104 2105 KASSERT(!cpu_softintr_p()); 2106 2107 type = sp->scp[cp->protoidx].rcr_type; 2108 buf = sp->scp[cp->protoidx].rcr_buf; 2109 blen = sp->scp[cp->protoidx].rcr_blen; 2110 2111 if (type == CP_RCR_ACK) { 2112 /* RCR+ event */ 2113 switch (sp->scp[cp->protoidx].state) { 2114 case STATE_OPENED: 2115 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2116 cp->tld(sp); 2117 cp->scr(sp); 2118 cp->scan(cp, sp); 2119 break; 2120 case STATE_ACK_SENT: 2121 case STATE_REQ_SENT: 2122 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2123 cp->scan(cp, sp); 2124 break; 2125 case STATE_STOPPED: 2126 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2127 cp->scr(sp); 2128 cp->scan(cp, sp); 2129 break; 2130 case STATE_ACK_RCVD: 2131 sppp_cp_change_state(cp, sp, STATE_OPENED); 2132 if (debug) 2133 log(LOG_DEBUG, "%s: %s tlu\n", 2134 ifp->if_xname, 2135 cp->name); 2136 cp->tlu(sp); 2137 cp->scan(cp, sp); 2138 break; 2139 case STATE_CLOSING: 2140 case STATE_STOPPING: 2141 if (buf != NULL) { 2142 sp->scp[cp->protoidx].rcr_buf = NULL; 2143 sp->scp[cp->protoidx].rcr_blen = 0; 2144 kmem_free(buf, blen); 2145 } 2146 break; 2147 case STATE_CLOSED: 2148 if ((cp->flags & CP_AUTH) == 0) { 2149 sppp_cp_send(sp, cp->proto, TERM_ACK, 2150 sp->scp[cp->protoidx].rconfid, 0, 0); 2151 } 2152 break; 2153 default: 2154 printf("%s: %s illegal RCR+ in state %s\n", 2155 ifp->if_xname, cp->name, 2156 sppp_state_name(sp->scp[cp->protoidx].state)); 2157 if_statinc(ifp, if_ierrors); 2158 } 2159 } else { 2160 /* RCR- event */ 2161 switch (sp->scp[cp->protoidx].state) { 2162 case STATE_OPENED: 2163 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2164 cp->tld(sp); 2165 cp->scr(sp); 2166 cp->scan(cp, sp); 2167 break; 2168 case STATE_ACK_SENT: 2169 case STATE_REQ_SENT: 2170 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2171 cp->scan(cp, sp); 2172 break; 2173 case STATE_STOPPED: 2174 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2175 cp->scr(sp); 2176 cp->scan(cp, sp); 2177 break; 2178 case STATE_ACK_RCVD: 2179 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2180 cp->scan(cp, sp); 2181 break; 2182 case STATE_CLOSING: 2183 case STATE_STOPPING: 2184 if (buf != NULL) { 2185 sp->scp[cp->protoidx].rcr_buf = NULL; 2186 sp->scp[cp->protoidx].rcr_blen = 0; 2187 kmem_free(buf, blen); 2188 } 2189 break; 2190 case STATE_CLOSED: 2191 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2192 if ((cp->flags & CP_AUTH) == 0) { 2193 sppp_cp_send(sp, cp->proto, TERM_ACK, 2194 sp->scp[cp->protoidx].rconfid, 0, 0); 2195 } 2196 break; 2197 default: 2198 printf("%s: %s illegal RCR- in state %s\n", 2199 ifp->if_xname, cp->name, 2200 sppp_state_name(sp->scp[cp->protoidx].state)); 2201 if_statinc(ifp, if_ierrors); 2202 } 2203 } 2204 } 2205 2206 static void 2207 sppp_rca_event(struct sppp *sp, void *xcp) 2208 { 2209 const struct cp *cp = xcp; 2210 STDDCL; 2211 2212 KASSERT(!cpu_softintr_p()); 2213 2214 switch (sp->scp[cp->protoidx].state) { 2215 case STATE_CLOSED: 2216 case STATE_STOPPED: 2217 if ((cp->flags & CP_AUTH) == 0) { 2218 sppp_cp_send(sp, cp->proto, TERM_ACK, 2219 sp->scp[cp->protoidx].rconfid, 0, 0); 2220 } 2221 break; 2222 case STATE_CLOSING: 2223 case STATE_STOPPING: 2224 break; 2225 case STATE_REQ_SENT: 2226 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2227 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2228 break; 2229 case STATE_OPENED: 2230 (cp->tld)(sp); 2231 /* fall through */ 2232 case STATE_ACK_RCVD: 2233 (cp->scr)(sp); 2234 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2235 break; 2236 case STATE_ACK_SENT: 2237 sppp_cp_change_state(cp, sp, STATE_OPENED); 2238 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2239 if (debug) 2240 log(LOG_DEBUG, "%s: %s tlu\n", 2241 ifp->if_xname, cp->name); 2242 (cp->tlu)(sp); 2243 break; 2244 default: 2245 printf("%s: %s illegal RCA in state %s\n", 2246 ifp->if_xname, cp->name, 2247 sppp_state_name(sp->scp[cp->protoidx].state)); 2248 if_statinc(ifp, if_ierrors); 2249 } 2250 } 2251 2252 static void 2253 sppp_rcn_event(struct sppp *sp, void *xcp) 2254 { 2255 const struct cp *cp = xcp; 2256 struct ifnet *ifp = &sp->pp_if; 2257 2258 KASSERT(!cpu_softintr_p()); 2259 2260 switch (sp->scp[cp->protoidx].state) { 2261 case STATE_CLOSED: 2262 case STATE_STOPPED: 2263 if ((cp->flags & CP_AUTH) == 0) { 2264 sppp_cp_send(sp, cp->proto, TERM_ACK, 2265 sp->scp[cp->protoidx].rconfid, 0, 0); 2266 } 2267 break; 2268 case STATE_REQ_SENT: 2269 case STATE_ACK_SENT: 2270 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2271 (cp->scr)(sp); 2272 break; 2273 case STATE_OPENED: 2274 (cp->tld)(sp); 2275 /* fall through */ 2276 case STATE_ACK_RCVD: 2277 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2278 (cp->scr)(sp); 2279 break; 2280 case STATE_CLOSING: 2281 case STATE_STOPPING: 2282 break; 2283 default: 2284 printf("%s: %s illegal RCN in state %s\n", 2285 ifp->if_xname, cp->name, 2286 sppp_state_name(sp->scp[cp->protoidx].state)); 2287 if_statinc(ifp, if_ierrors); 2288 } 2289 } 2290 2291 static void 2292 sppp_rtr_event(struct sppp *sp, void *xcp) 2293 { 2294 const struct cp *cp = xcp; 2295 STDDCL; 2296 2297 KASSERT(!cpu_softintr_p()); 2298 2299 switch (sp->scp[cp->protoidx].state) { 2300 case STATE_ACK_RCVD: 2301 case STATE_ACK_SENT: 2302 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2303 break; 2304 case STATE_CLOSED: 2305 case STATE_STOPPED: 2306 case STATE_CLOSING: 2307 case STATE_STOPPING: 2308 case STATE_REQ_SENT: 2309 break; 2310 case STATE_OPENED: 2311 (cp->tld)(sp); 2312 sp->scp[cp->protoidx].rst_counter = 0; 2313 sppp_cp_change_state(cp, sp, STATE_STOPPING); 2314 break; 2315 default: 2316 printf("%s: %s illegal RTR in state %s\n", 2317 ifp->if_xname, cp->name, 2318 sppp_state_name(sp->scp[cp->protoidx].state)); 2319 if_statinc(ifp, if_ierrors); 2320 return; 2321 } 2322 2323 /* Send Terminate-Ack packet. */ 2324 if (debug) 2325 log(LOG_DEBUG, "%s: %s send terminate-ack\n", 2326 ifp->if_xname, cp->name); 2327 if ((cp->flags & CP_AUTH) == 0) { 2328 sppp_cp_send(sp, cp->proto, TERM_ACK, 2329 sp->scp[cp->protoidx].rseq, 0, 0); 2330 } 2331 } 2332 2333 static void 2334 sppp_rta_event(struct sppp *sp, void *xcp) 2335 { 2336 const struct cp *cp = xcp; 2337 struct ifnet *ifp = &sp->pp_if; 2338 2339 KASSERT(!cpu_softintr_p()); 2340 2341 switch (sp->scp[cp->protoidx].state) { 2342 case STATE_CLOSED: 2343 case STATE_STOPPED: 2344 case STATE_REQ_SENT: 2345 case STATE_ACK_SENT: 2346 break; 2347 case STATE_CLOSING: 2348 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2349 (cp->tlf)(cp, sp); 2350 break; 2351 case STATE_STOPPING: 2352 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2353 (cp->tlf)(cp, sp); 2354 break; 2355 case STATE_ACK_RCVD: 2356 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2357 break; 2358 case STATE_OPENED: 2359 (cp->tld)(sp); 2360 (cp->scr)(sp); 2361 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2362 break; 2363 default: 2364 printf("%s: %s illegal RTA in state %s\n", 2365 ifp->if_xname, cp->name, 2366 sppp_state_name(sp->scp[cp->protoidx].state)); 2367 if_statinc(ifp, if_ierrors); 2368 } 2369 } 2370 2371 static void 2372 sppp_rxj_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 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 2380 switch (sp->scp[cp->protoidx].state) { 2381 case STATE_CLOSED: 2382 case STATE_STOPPED: 2383 case STATE_REQ_SENT: 2384 case STATE_ACK_SENT: 2385 case STATE_CLOSING: 2386 case STATE_STOPPING: 2387 case STATE_OPENED: 2388 break; 2389 case STATE_ACK_RCVD: 2390 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2391 break; 2392 default: 2393 printf("%s: %s illegal RXJ- in state %s\n", 2394 ifp->if_xname, cp->name, 2395 sppp_state_name(sp->scp[cp->protoidx].state)); 2396 if_statinc(ifp, if_ierrors); 2397 } 2398 } 2399 2400 /* 2401 * Change the state of a control protocol in the state automaton. 2402 * Takes care of starting/stopping the restart timer. 2403 */ 2404 void 2405 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 2406 { 2407 2408 KASSERT(SPPP_WLOCKED(sp)); 2409 2410 sp->scp[cp->protoidx].state = newstate; 2411 callout_stop(&sp->scp[cp->protoidx].ch); 2412 switch (newstate) { 2413 case STATE_INITIAL: 2414 case STATE_STARTING: 2415 case STATE_CLOSED: 2416 case STATE_STOPPED: 2417 case STATE_OPENED: 2418 break; 2419 case STATE_CLOSING: 2420 case STATE_STOPPING: 2421 case STATE_REQ_SENT: 2422 case STATE_ACK_RCVD: 2423 case STATE_ACK_SENT: 2424 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2425 break; 2426 } 2427 } 2428 2429 /* 2430 *--------------------------------------------------------------------------* 2431 * * 2432 * The LCP implementation. * 2433 * * 2434 *--------------------------------------------------------------------------* 2435 */ 2436 static void 2437 sppp_lcp_init(struct sppp *sp) 2438 { 2439 2440 KASSERT(SPPP_WLOCKED(sp)); 2441 2442 sppp_cp_init(&lcp, sp); 2443 2444 SET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC); 2445 sp->lcp.magic = 0; 2446 sp->lcp.protos = 0; 2447 sp->lcp.max_terminate = 2; 2448 sp->lcp.max_configure = 10; 2449 sp->lcp.max_failure = 10; 2450 sp->lcp.tlf_sent = false; 2451 2452 /* 2453 * Initialize counters and timeout values. Note that we don't 2454 * use the 3 seconds suggested in RFC 1661 since we are likely 2455 * running on a fast link. XXX We should probably implement 2456 * the exponential backoff option. Note that these values are 2457 * relevant for all control protocols, not just LCP only. 2458 */ 2459 sp->lcp.timeout = 1 * hz; 2460 } 2461 2462 static void 2463 sppp_lcp_up(struct sppp *sp, void *xcp) 2464 { 2465 const struct cp *cp = xcp; 2466 int pidx; 2467 STDDCL; 2468 2469 KASSERT(SPPP_WLOCKED(sp)); 2470 2471 pidx = cp->protoidx; 2472 /* Initialize activity timestamp: opening a connection is an activity */ 2473 sp->pp_last_receive = sp->pp_last_activity = time_uptime; 2474 2475 /* 2476 * If this interface is passive or dial-on-demand, and we are 2477 * still in Initial state, it means we've got an incoming 2478 * call. Activate the interface. 2479 */ 2480 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2481 if (debug) 2482 log(LOG_DEBUG, 2483 "%s: Up event", ifp->if_xname); 2484 ifp->if_flags |= IFF_RUNNING; 2485 if (sp->scp[pidx].state == STATE_INITIAL) { 2486 if (debug) 2487 addlog("(incoming call)\n"); 2488 sp->pp_flags |= PP_CALLIN; 2489 sppp_wq_add(sp->wq_cp, &sp->scp[pidx].work_open); 2490 } else if (debug) 2491 addlog("\n"); 2492 } 2493 2494 sppp_up_event(sp, xcp); 2495 } 2496 2497 static void 2498 sppp_lcp_down(struct sppp *sp, void *xcp) 2499 { 2500 const struct cp *cp = xcp; 2501 int pidx; 2502 STDDCL; 2503 2504 KASSERT(SPPP_WLOCKED(sp)); 2505 KASSERT(!cpu_softintr_p()); 2506 2507 pidx = cp->protoidx; 2508 sppp_down_event(sp, xcp); 2509 2510 /* 2511 * We need to do tls to restart when a down event is caused 2512 * by the last tlf. 2513 */ 2514 if (sp->scp[pidx].state == STATE_STARTING && 2515 sp->lcp.tlf_sent) { 2516 cp->tls(cp, sp); 2517 sp->lcp.tlf_sent = false; 2518 } 2519 2520 /* 2521 * If this is neither a dial-on-demand nor a passive 2522 * interface, simulate an ``ifconfig down'' action, so the 2523 * administrator can force a redial by another ``ifconfig 2524 * up''. XXX For leased line operation, should we immediately 2525 * try to reopen the connection here? 2526 */ 2527 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2528 if (debug) 2529 log(LOG_INFO, 2530 "%s: Down event (carrier loss), taking interface down.\n", 2531 ifp->if_xname); 2532 SPPP_UNLOCK(sp); 2533 if_down(ifp); 2534 SPPP_LOCK(sp, RW_WRITER); 2535 2536 if (sp->lcp.reestablish) 2537 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 2538 } else { 2539 if (debug) 2540 log(LOG_DEBUG, 2541 "%s: Down event (carrier loss)\n", 2542 ifp->if_xname); 2543 2544 sp->pp_flags &= ~PP_CALLIN; 2545 if (sp->scp[pidx].state != STATE_INITIAL) 2546 sppp_wq_add(sp->wq_cp, &sp->scp[pidx].work_close); 2547 ifp->if_flags &= ~IFF_RUNNING; 2548 } 2549 sp->scp[pidx].fail_counter = 0; 2550 } 2551 2552 static void 2553 sppp_lcp_open(struct sppp *sp, void *xcp) 2554 { 2555 2556 KASSERT(SPPP_WLOCKED(sp)); 2557 KASSERT(!cpu_softintr_p()); 2558 2559 sp->lcp.reestablish = false; 2560 2561 if (sp->pp_if.if_mtu < PP_MTU) { 2562 sp->lcp.mru = sp->pp_if.if_mtu; 2563 SET(sp->lcp.opts, SPPP_LCP_OPT_MRU); 2564 } else 2565 sp->lcp.mru = PP_MTU; 2566 sp->lcp.their_mru = PP_MTU; 2567 2568 /* 2569 * If we are authenticator, negotiate LCP_AUTH 2570 */ 2571 if (sp->hisauth.proto != 0) 2572 SET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 2573 else 2574 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 2575 sp->pp_flags &= ~PP_NEEDAUTH; 2576 sppp_open_event(sp, xcp); 2577 } 2578 2579 /* 2580 * Analyze a configure request. Return true if it was agreeable, and 2581 * caused action sca, false if it has been rejected or nak'ed, and 2582 * caused action scn. (The return value is used to make the state 2583 * transition decision in the state automaton.) 2584 */ 2585 static enum cp_rcr_type 2586 sppp_lcp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 2587 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 2588 { 2589 STDDCL; 2590 u_char *buf, *r, *p, l, blen; 2591 enum cp_rcr_type type; 2592 int len, rlen; 2593 uint32_t nmagic; 2594 u_short authproto; 2595 2596 KASSERT(SPPP_WLOCKED(sp)); 2597 2598 if (origlen < sizeof(*h)) 2599 return CP_RCR_DROP; 2600 2601 origlen -= sizeof(*h); 2602 type = CP_RCR_NONE; 2603 type = 0; 2604 2605 if (origlen <= 0) 2606 return CP_RCR_DROP; 2607 else 2608 blen = origlen; 2609 2610 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 2611 if (buf == NULL) 2612 return CP_RCR_DROP; 2613 2614 if (debug) 2615 log(LOG_DEBUG, "%s: lcp parse opts:", 2616 ifp->if_xname); 2617 2618 /* pass 1: check for things that need to be rejected */ 2619 p = (void *)(h + 1); 2620 r = buf; 2621 rlen = 0; 2622 for (len = origlen; len > 1; len-= l, p += l) { 2623 l = p[1]; 2624 if (l == 0) 2625 break; 2626 2627 /* Sanity check option length */ 2628 if (l > len) { 2629 /* 2630 * Malicious option - drop immediately. 2631 * XXX Maybe we should just RXJ it? 2632 */ 2633 addlog("%s: received malicious LCP option 0x%02x, " 2634 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp->if_xname, 2635 p[0], l, len); 2636 type = CP_RCR_ERR; 2637 goto end; 2638 } 2639 if (debug) 2640 addlog(" %s", sppp_lcp_opt_name(*p)); 2641 switch (p[0]) { 2642 case LCP_OPT_MAGIC: 2643 /* Magic number. */ 2644 /* fall through, both are same length */ 2645 case LCP_OPT_ASYNC_MAP: 2646 /* Async control character map. */ 2647 if (len >= 6 || l == 6) 2648 continue; 2649 if (debug) 2650 addlog(" [invalid]"); 2651 break; 2652 case LCP_OPT_MP_EID: 2653 if (len >= l && l >= 3) { 2654 switch (p[2]) { 2655 case 0: if (l==3+ 0) continue;break; 2656 case 2: if (l==3+ 4) continue;break; 2657 case 3: if (l==3+ 6) continue;break; 2658 case 6: if (l==3+16) continue;break; 2659 case 1: /* FALLTHROUGH */ 2660 case 4: if (l<=3+20) continue;break; 2661 case 5: if (l<=3+15) continue;break; 2662 /* XXX should it be default: continue;? */ 2663 } 2664 } 2665 if (debug) 2666 addlog(" [invalid class %d len %d]", p[2], l); 2667 break; 2668 case LCP_OPT_MP_SSNHF: 2669 if (len >= 2 && l == 2) { 2670 if (debug) 2671 addlog(" [rej]"); 2672 break; 2673 } 2674 if (debug) 2675 addlog(" [invalid]"); 2676 break; 2677 case LCP_OPT_MP_MRRU: 2678 /* Multilink maximum received reconstructed unit */ 2679 /* should be fall through, both are same length */ 2680 /* FALLTHROUGH */ 2681 case LCP_OPT_MRU: 2682 /* Maximum receive unit. */ 2683 if (len >= 4 && l == 4) 2684 continue; 2685 if (debug) 2686 addlog(" [invalid]"); 2687 break; 2688 case LCP_OPT_AUTH_PROTO: 2689 if (len < 4) { 2690 if (debug) 2691 addlog(" [invalid]"); 2692 break; 2693 } 2694 authproto = (p[2] << 8) + p[3]; 2695 if (authproto == PPP_CHAP && l != 5) { 2696 if (debug) 2697 addlog(" [invalid chap len]"); 2698 break; 2699 } 2700 if (sp->myauth.proto == 0) { 2701 /* we are not configured to do auth */ 2702 if (debug) 2703 addlog(" [not configured]"); 2704 break; 2705 } 2706 /* 2707 * Remote want us to authenticate, remember this, 2708 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2709 * up. 2710 */ 2711 sp->pp_flags |= PP_NEEDAUTH; 2712 continue; 2713 default: 2714 /* Others not supported. */ 2715 if (debug) 2716 addlog(" [rej]"); 2717 break; 2718 } 2719 if (rlen + l > blen) { 2720 if (debug) 2721 addlog(" [overflow]"); 2722 continue; 2723 } 2724 /* Add the option to rejected list. */ 2725 memcpy(r, p, l); 2726 r += l; 2727 rlen += l; 2728 } 2729 2730 if (rlen > 0) { 2731 type = CP_RCR_REJ; 2732 goto end; 2733 } 2734 2735 if (debug) 2736 addlog("\n"); 2737 2738 /* 2739 * pass 2: check for option values that are unacceptable and 2740 * thus require to be nak'ed. 2741 */ 2742 if (debug) 2743 log(LOG_DEBUG, "%s: lcp parse opt values: ", 2744 ifp->if_xname); 2745 2746 p = (void *)(h + 1); 2747 r = buf; 2748 rlen = 0; 2749 for (len = origlen; len > 0; len -= l, p += l) { 2750 l = p[1]; 2751 if (l == 0) 2752 break; 2753 2754 if (debug) 2755 addlog(" %s", sppp_lcp_opt_name(*p)); 2756 switch (p[0]) { 2757 case LCP_OPT_MAGIC: 2758 /* Magic number -- extract. */ 2759 nmagic = (uint32_t)p[2] << 24 | 2760 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2761 if (nmagic != sp->lcp.magic) { 2762 if (debug) 2763 addlog(" 0x%x", nmagic); 2764 continue; 2765 } 2766 /* 2767 * Local and remote magics equal -- loopback? 2768 */ 2769 if (sp->pp_loopcnt >= LOOPALIVECNT*5) { 2770 printf ("%s: loopback\n", 2771 ifp->if_xname); 2772 sp->pp_loopcnt = 0; 2773 if (ifp->if_flags & IFF_UP) { 2774 SPPP_UNLOCK(sp); 2775 if_down(ifp); 2776 SPPP_LOCK(sp, RW_WRITER); 2777 2778 IF_PURGE(&sp->pp_cpq); 2779 /* XXX ? */ 2780 sppp_wq_add(sp->wq_cp, 2781 &sp->scp[IDX_LCP].work_down); 2782 sppp_wq_add(sp->wq_cp, 2783 &sp->scp[IDX_LCP].work_up); 2784 } 2785 } else if (debug) 2786 addlog(" [glitch]"); 2787 ++sp->pp_loopcnt; 2788 /* 2789 * We negate our magic here, and NAK it. If 2790 * we see it later in an NAK packet, we 2791 * suggest a new one. 2792 */ 2793 nmagic = ~sp->lcp.magic; 2794 /* Gonna NAK it. */ 2795 p[2] = nmagic >> 24; 2796 p[3] = nmagic >> 16; 2797 p[4] = nmagic >> 8; 2798 p[5] = nmagic; 2799 break; 2800 2801 case LCP_OPT_ASYNC_MAP: 2802 /* 2803 * Async control character map -- just ignore it. 2804 * 2805 * Quote from RFC 1662, chapter 6: 2806 * To enable this functionality, synchronous PPP 2807 * implementations MUST always respond to the 2808 * Async-Control-Character-Map Configuration 2809 * Option with the LCP Configure-Ack. However, 2810 * acceptance of the Configuration Option does 2811 * not imply that the synchronous implementation 2812 * will do any ACCM mapping. Instead, all such 2813 * octet mapping will be performed by the 2814 * asynchronous-to-synchronous converter. 2815 */ 2816 continue; 2817 2818 case LCP_OPT_MRU: 2819 /* 2820 * Maximum receive unit. Always agreeable, 2821 * but ignored by now. 2822 */ 2823 sp->lcp.their_mru = p[2] * 256 + p[3]; 2824 if (debug) 2825 addlog(" %ld", sp->lcp.their_mru); 2826 continue; 2827 2828 case LCP_OPT_AUTH_PROTO: 2829 authproto = (p[2] << 8) + p[3]; 2830 if (sp->myauth.proto != authproto) { 2831 /* not agreed, nak */ 2832 if (debug) 2833 addlog(" [mine %s != his %s]", 2834 sppp_proto_name(sp->myauth.proto), 2835 sppp_proto_name(authproto)); 2836 p[2] = sp->myauth.proto >> 8; 2837 p[3] = sp->myauth.proto; 2838 break; 2839 } 2840 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2841 if (debug) 2842 addlog(" [chap not MD5]"); 2843 p[4] = CHAP_MD5; 2844 break; 2845 } 2846 continue; 2847 case LCP_OPT_MP_EID: 2848 /* 2849 * Endpoint identification. 2850 * Always agreeable, 2851 * but ignored by now. 2852 */ 2853 if (debug) { 2854 addlog(" type %d", p[2]); 2855 sppp_print_bytes(p+3, p[1]-3); 2856 } 2857 continue; 2858 case LCP_OPT_MP_MRRU: 2859 /* 2860 * Maximum received reconstructed unit. 2861 * Always agreeable, 2862 * but ignored by now. 2863 */ 2864 sp->lcp.their_mrru = p[2] * 256 + p[3]; 2865 if (debug) 2866 addlog(" %ld", sp->lcp.their_mrru); 2867 continue; 2868 } 2869 if (rlen + l > blen) { 2870 if (debug) 2871 addlog(" [overflow]"); 2872 continue; 2873 } 2874 /* Add the option to nak'ed list. */ 2875 memcpy(r, p, l); 2876 r += l; 2877 rlen += l; 2878 } 2879 2880 if (rlen > 0) { 2881 if (++sp->scp[IDX_LCP].fail_counter >= sp->lcp.max_failure) { 2882 if (debug) 2883 addlog(" max_failure (%d) exceeded, ", 2884 sp->lcp.max_failure); 2885 type = CP_RCR_REJ; 2886 } else { 2887 type = CP_RCR_NAK; 2888 } 2889 } else { 2890 type = CP_RCR_ACK; 2891 rlen = origlen; 2892 memcpy(r, h + 1, rlen); 2893 sp->scp[IDX_LCP].fail_counter = 0; 2894 sp->pp_loopcnt = 0; 2895 } 2896 2897 end: 2898 if (debug) 2899 addlog("\n"); 2900 2901 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 2902 if (buf != NULL) 2903 kmem_intr_free(buf, blen); 2904 } else { 2905 *msgbuf = buf; 2906 *buflen = blen; 2907 *msglen = rlen; 2908 } 2909 2910 return type; 2911 } 2912 2913 /* 2914 * Analyze the LCP Configure-Reject option list, and adjust our 2915 * negotiation. 2916 */ 2917 static void 2918 sppp_lcp_confrej(struct sppp *sp, struct lcp_header *h, int len) 2919 { 2920 STDDCL; 2921 u_char *p, l; 2922 2923 KASSERT(SPPP_WLOCKED(sp)); 2924 2925 if (len <= sizeof(*h)) 2926 return; 2927 2928 len -= sizeof(*h); 2929 2930 if (debug) 2931 log(LOG_DEBUG, "%s: lcp rej opts:", 2932 ifp->if_xname); 2933 2934 p = (void *)(h + 1); 2935 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2936 /* Sanity check option length */ 2937 if (l > len) { 2938 /* 2939 * Malicious option - drop immediately. 2940 * XXX Maybe we should just RXJ it? 2941 */ 2942 addlog("%s: received malicious LCP option, " 2943 "dropping.\n", ifp->if_xname); 2944 goto end; 2945 } 2946 if (debug) 2947 addlog(" %s", sppp_lcp_opt_name(*p)); 2948 switch (p[0]) { 2949 case LCP_OPT_MAGIC: 2950 /* Magic number -- can't use it, use 0 */ 2951 CLR(sp->lcp.opts, SPPP_LCP_OPT_MAGIC); 2952 sp->lcp.magic = 0; 2953 break; 2954 case LCP_OPT_MRU: 2955 /* 2956 * We try to negotiate a lower MRU if the underlying 2957 * link's MTU is less than PP_MTU (e.g. PPPoE). If the 2958 * peer rejects this lower rate, fallback to the 2959 * default. 2960 */ 2961 if (debug) { 2962 addlog("%s: warning: peer rejected our MRU of " 2963 "%ld bytes. Defaulting to %d bytes\n", 2964 ifp->if_xname, sp->lcp.mru, PP_MTU); 2965 } 2966 CLR(sp->lcp.opts, SPPP_LCP_OPT_MRU); 2967 sp->lcp.mru = PP_MTU; 2968 break; 2969 case LCP_OPT_AUTH_PROTO: 2970 /* 2971 * Peer doesn't want to authenticate himself, 2972 * deny unless this is a dialout call, and 2973 * SPPP_AUTHFLAG_NOCALLOUT is set. 2974 */ 2975 if ((sp->pp_flags & PP_CALLIN) == 0 && 2976 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2977 if (debug) 2978 addlog(" [don't insist on auth " 2979 "for callout]"); 2980 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 2981 break; 2982 } 2983 if (debug) 2984 addlog("[access denied]\n"); 2985 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 2986 break; 2987 } 2988 } 2989 if (debug) 2990 addlog("\n"); 2991 end: 2992 return; 2993 } 2994 2995 /* 2996 * Analyze the LCP Configure-NAK option list, and adjust our 2997 * negotiation. 2998 */ 2999 static void 3000 sppp_lcp_confnak(struct sppp *sp, struct lcp_header *h, int len) 3001 { 3002 STDDCL; 3003 u_char *p, l; 3004 uint32_t magic; 3005 3006 KASSERT(SPPP_WLOCKED(sp)); 3007 3008 if (len <= sizeof(*h)) 3009 return; 3010 len -= sizeof(*h); 3011 3012 if (debug) 3013 log(LOG_DEBUG, "%s: lcp nak opts:", 3014 ifp->if_xname); 3015 3016 p = (void *)(h + 1); 3017 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3018 /* Sanity check option length */ 3019 if (l > len) { 3020 /* 3021 * Malicious option - drop immediately. 3022 * XXX Maybe we should just RXJ it? 3023 */ 3024 addlog("%s: received malicious LCP option, " 3025 "dropping.\n", ifp->if_xname); 3026 goto end; 3027 } 3028 if (debug) 3029 addlog(" %s", sppp_lcp_opt_name(*p)); 3030 switch (p[0]) { 3031 case LCP_OPT_MAGIC: 3032 /* Magic number -- renegotiate */ 3033 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC) && 3034 len >= 6 && l == 6) { 3035 magic = (uint32_t)p[2] << 24 | 3036 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 3037 /* 3038 * If the remote magic is our negated one, 3039 * this looks like a loopback problem. 3040 * Suggest a new magic to make sure. 3041 */ 3042 if (magic == ~sp->lcp.magic) { 3043 if (debug) 3044 addlog(" magic glitch"); 3045 sp->lcp.magic = cprng_fast32(); 3046 } else { 3047 sp->lcp.magic = magic; 3048 if (debug) 3049 addlog(" %d", magic); 3050 } 3051 } 3052 break; 3053 case LCP_OPT_MRU: 3054 /* 3055 * Peer wants to advise us to negotiate an MRU. 3056 * Agree on it if it's reasonable, or use 3057 * default otherwise. 3058 */ 3059 if (len >= 4 && l == 4) { 3060 u_int mru = p[2] * 256 + p[3]; 3061 if (debug) 3062 addlog(" %d", mru); 3063 if (mru < PPP_MINMRU || mru > sp->pp_if.if_mtu) 3064 mru = sp->pp_if.if_mtu; 3065 sp->lcp.mru = mru; 3066 SET(sp->lcp.opts, SPPP_LCP_OPT_MRU); 3067 } 3068 break; 3069 case LCP_OPT_AUTH_PROTO: 3070 /* 3071 * Peer doesn't like our authentication method, 3072 * deny. 3073 */ 3074 if (debug) 3075 addlog("[access denied]\n"); 3076 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3077 break; 3078 } 3079 } 3080 if (debug) 3081 addlog("\n"); 3082 end: 3083 return; 3084 } 3085 3086 static void 3087 sppp_lcp_tlu(struct sppp *sp) 3088 { 3089 struct ifnet *ifp = &sp->pp_if; 3090 int i; 3091 3092 KASSERT(SPPP_WLOCKED(sp)); 3093 3094 /* XXX ? */ 3095 if (! (ifp->if_flags & IFF_UP) && 3096 (ifp->if_flags & IFF_RUNNING)) { 3097 /* Coming out of loopback mode. */ 3098 SPPP_UNLOCK(sp); 3099 if_up(ifp); 3100 SPPP_LOCK(sp, RW_WRITER); 3101 } 3102 3103 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO) || 3104 (sp->pp_flags & PP_NEEDAUTH) != 0) 3105 sppp_change_phase(sp, SPPP_PHASE_AUTHENTICATE); 3106 else 3107 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 3108 3109 /* 3110 * Open all authentication protocols. This is even required 3111 * if we already proceeded to network phase, since it might be 3112 * that remote wants us to authenticate, so we might have to 3113 * send a PAP request. Undesired authentication protocols 3114 * don't do anything when they get an Open event. 3115 */ 3116 for (i = 0; i < IDX_COUNT; i++) 3117 if ((cps[i])->flags & CP_AUTH) { 3118 sppp_wq_add(sp->wq_cp, 3119 &sp->scp[(cps[i])->protoidx].work_open); 3120 } 3121 3122 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 3123 /* Notify all NCPs. */ 3124 for (i = 0; i < IDX_COUNT; i++) 3125 if ((cps[i])->flags & CP_NCP) { 3126 sppp_wq_add(sp->wq_cp, 3127 &sp->scp[(cps[i])->protoidx].work_open); 3128 } 3129 } 3130 3131 /* notify low-level driver of state change */ 3132 sppp_notify_chg_wlocked(sp); 3133 } 3134 3135 static void 3136 sppp_lcp_tld(struct sppp *sp) 3137 { 3138 int i, pi, phase; 3139 3140 KASSERT(SPPP_WLOCKED(sp)); 3141 3142 phase = sp->pp_phase; 3143 3144 sppp_change_phase(sp, SPPP_PHASE_TERMINATE); 3145 3146 /* 3147 * Take upper layers down. We send the Down event first and 3148 * the Close second to prevent the upper layers from sending 3149 * ``a flurry of terminate-request packets'', as the RFC 3150 * describes it. 3151 */ 3152 for (i = 0; i < IDX_COUNT; i++) { 3153 pi = (cps[i])->protoidx; 3154 if (((cps[i])->flags & CP_LCP) == 0) { 3155 /* skip if ncp was not started */ 3156 if (phase != SPPP_PHASE_NETWORK && 3157 ((cps[i])->flags & CP_NCP) != 0) 3158 continue; 3159 3160 sppp_wq_add(sp->wq_cp, &sp->scp[pi].work_down); 3161 sppp_wq_add(sp->wq_cp, &sp->scp[pi].work_close); 3162 } 3163 } 3164 } 3165 3166 static void 3167 sppp_lcp_tls(const struct cp *cp __unused, struct sppp *sp) 3168 { 3169 3170 KASSERT(SPPP_WLOCKED(sp)); 3171 3172 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 3173 printf("%s: authentication failed %d times, not retrying again\n", 3174 sp->pp_if.if_xname, sp->pp_auth_failures); 3175 3176 SPPP_UNLOCK(sp); 3177 if_down(&sp->pp_if); 3178 SPPP_LOCK(sp, RW_WRITER); 3179 return; 3180 } 3181 3182 sppp_change_phase(sp, SPPP_PHASE_ESTABLISH); 3183 3184 /* Notify lower layer if desired. */ 3185 sppp_notify_tls_wlocked(sp); 3186 sp->lcp.tlf_sent = false; 3187 } 3188 3189 static void 3190 sppp_lcp_tlf(const struct cp *cp __unused, struct sppp *sp) 3191 { 3192 3193 KASSERT(SPPP_WLOCKED(sp)); 3194 3195 sppp_change_phase(sp, SPPP_PHASE_DEAD); 3196 3197 /* Notify lower layer if desired. */ 3198 sppp_notify_tlf_wlocked(sp); 3199 3200 switch (sp->scp[IDX_LCP].state) { 3201 case STATE_CLOSED: 3202 case STATE_STOPPED: 3203 sp->lcp.tlf_sent = true; 3204 break; 3205 case STATE_INITIAL: 3206 default: 3207 /* just in case */ 3208 sp->lcp.tlf_sent = false; 3209 } 3210 } 3211 3212 static void 3213 sppp_lcp_scr(struct sppp *sp) 3214 { 3215 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 3216 int i = 0; 3217 u_short authproto; 3218 3219 KASSERT(SPPP_WLOCKED(sp)); 3220 3221 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC)) { 3222 if (! sp->lcp.magic) 3223 sp->lcp.magic = cprng_fast32(); 3224 opt[i++] = LCP_OPT_MAGIC; 3225 opt[i++] = 6; 3226 opt[i++] = sp->lcp.magic >> 24; 3227 opt[i++] = sp->lcp.magic >> 16; 3228 opt[i++] = sp->lcp.magic >> 8; 3229 opt[i++] = sp->lcp.magic; 3230 } 3231 3232 if (ISSET(sp->lcp.opts,SPPP_LCP_OPT_MRU)) { 3233 opt[i++] = LCP_OPT_MRU; 3234 opt[i++] = 4; 3235 opt[i++] = sp->lcp.mru >> 8; 3236 opt[i++] = sp->lcp.mru; 3237 } 3238 3239 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO)) { 3240 authproto = sp->hisauth.proto; 3241 opt[i++] = LCP_OPT_AUTH_PROTO; 3242 opt[i++] = authproto == PPP_CHAP? 5: 4; 3243 opt[i++] = authproto >> 8; 3244 opt[i++] = authproto; 3245 if (authproto == PPP_CHAP) 3246 opt[i++] = CHAP_MD5; 3247 } 3248 3249 sp->scp[IDX_LCP].confid = ++sp->scp[IDX_LCP].seq; 3250 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->scp[IDX_LCP].confid, i, &opt); 3251 } 3252 3253 /* 3254 * Check the open NCPs, return true if at least one NCP is open. 3255 */ 3256 3257 static int 3258 sppp_cp_check(struct sppp *sp, u_char cp_flags) 3259 { 3260 int i, mask; 3261 3262 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 3263 if ((sp->lcp.protos & mask) && (cps[i])->flags & cp_flags) 3264 return 1; 3265 return 0; 3266 } 3267 3268 /* 3269 * Re-check the open NCPs and see if we should terminate the link. 3270 * Called by the NCPs during their tlf action handling. 3271 */ 3272 static void 3273 sppp_lcp_check_and_close(struct sppp *sp) 3274 { 3275 3276 KASSERT(SPPP_WLOCKED(sp)); 3277 3278 if (sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 3279 /* don't bother, we are already going down */ 3280 return; 3281 } 3282 3283 if (sp->pp_phase == SPPP_PHASE_AUTHENTICATE && 3284 sppp_cp_check(sp, CP_AUTH)) 3285 return; 3286 3287 if (sp->pp_phase >= SPPP_PHASE_NETWORK && 3288 sppp_cp_check(sp, CP_NCP)) 3289 return; 3290 3291 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3292 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 3293 } 3294 3295 /* 3296 *--------------------------------------------------------------------------* 3297 * * 3298 * The IPCP implementation. * 3299 * * 3300 *--------------------------------------------------------------------------* 3301 */ 3302 3303 static void 3304 sppp_ipcp_init(struct sppp *sp) 3305 { 3306 3307 KASSERT(SPPP_WLOCKED(sp)); 3308 3309 sppp_cp_init(&ipcp, sp); 3310 3311 sp->ipcp.opts = 0; 3312 sp->ipcp.flags = 0; 3313 } 3314 3315 static void 3316 sppp_ipcp_open(struct sppp *sp, void *xcp) 3317 { 3318 STDDCL; 3319 uint32_t myaddr, hisaddr; 3320 3321 KASSERT(SPPP_WLOCKED(sp)); 3322 KASSERT(!cpu_softintr_p()); 3323 3324 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 3325 sp->ipcp.req_myaddr = 0; 3326 sp->ipcp.req_hisaddr = 0; 3327 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 3328 3329 #ifdef INET 3330 kpreempt_disable(); 3331 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3332 kpreempt_enable(); 3333 #else 3334 myaddr = hisaddr = 0; 3335 #endif 3336 /* 3337 * If we don't have his address, this probably means our 3338 * interface doesn't want to talk IP at all. (This could 3339 * be the case if somebody wants to speak only IPX, for 3340 * example.) Don't open IPCP in this case. 3341 */ 3342 if (hisaddr == 0) { 3343 /* XXX this message should go away */ 3344 if (debug) 3345 log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n", 3346 ifp->if_xname); 3347 return; 3348 } 3349 3350 if (myaddr == 0) { 3351 /* 3352 * I don't have an assigned address, so i need to 3353 * negotiate my address. 3354 */ 3355 sp->ipcp.flags |= IPCP_MYADDR_DYN; 3356 SET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3357 } 3358 if (hisaddr == 1) { 3359 /* 3360 * XXX - remove this hack! 3361 * remote has no valid address, we need to get one assigned. 3362 */ 3363 sp->ipcp.flags |= IPCP_HISADDR_DYN; 3364 } 3365 3366 if (sp->query_dns & 1) { 3367 SET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3368 } else { 3369 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3370 } 3371 3372 if (sp->query_dns & 2) { 3373 SET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3374 } else { 3375 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3376 } 3377 sppp_open_event(sp, xcp); 3378 } 3379 3380 static void 3381 sppp_ipcp_close(struct sppp *sp, void *xcp) 3382 { 3383 3384 KASSERT(SPPP_WLOCKED(sp)); 3385 KASSERT(!cpu_softintr_p()); 3386 3387 sppp_close_event(sp, xcp); 3388 3389 #ifdef INET 3390 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 3391 /* 3392 * Some address was dynamic, clear it again. 3393 */ 3394 sppp_clear_ip_addrs(sp); 3395 #endif 3396 } 3397 3398 /* 3399 * Analyze a configure request. Return true if it was agreeable, and 3400 * caused action sca, false if it has been rejected or nak'ed, and 3401 * caused action scn. (The return value is used to make the state 3402 * transition decision in the state automaton.) 3403 */ 3404 static enum cp_rcr_type 3405 sppp_ipcp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 3406 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 3407 { 3408 u_char *buf, *r, *p, l, blen; 3409 enum cp_rcr_type type; 3410 struct ifnet *ifp = &sp->pp_if; 3411 int rlen, len, debug = ifp->if_flags & IFF_DEBUG; 3412 uint32_t hisaddr, desiredaddr; 3413 3414 KASSERT(SPPP_WLOCKED(sp)); 3415 3416 type = CP_RCR_NONE; 3417 origlen -= sizeof(*h); 3418 3419 if (origlen < 0) 3420 return CP_RCR_DROP; 3421 3422 /* 3423 * Make sure to allocate a buf that can at least hold a 3424 * conf-nak with an `address' option. We might need it below. 3425 */ 3426 blen = MAX(6, origlen); 3427 3428 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 3429 if (buf == NULL) 3430 return CP_RCR_DROP; 3431 3432 /* pass 1: see if we can recognize them */ 3433 if (debug) 3434 log(LOG_DEBUG, "%s: ipcp parse opts:", 3435 ifp->if_xname); 3436 p = (void *)(h + 1); 3437 r = buf; 3438 rlen = 0; 3439 for (len = origlen; len > 1; len -= l, p += l) { 3440 l = p[1]; 3441 if (l == 0) 3442 break; 3443 3444 /* Sanity check option length */ 3445 if (l > len) { 3446 /* XXX should we just RXJ? */ 3447 addlog("%s: malicious IPCP option received, dropping\n", 3448 ifp->if_xname); 3449 type = CP_RCR_ERR; 3450 goto end; 3451 } 3452 if (debug) 3453 addlog(" %s", sppp_ipcp_opt_name(*p)); 3454 switch (p[0]) { 3455 #ifdef notyet 3456 case IPCP_OPT_COMPRESSION: 3457 if (len >= 6 && l >= 6) { 3458 /* correctly formed compress option */ 3459 continue; 3460 } 3461 if (debug) 3462 addlog(" [invalid]"); 3463 break; 3464 #endif 3465 case IPCP_OPT_ADDRESS: 3466 if (len >= 6 && l == 6) { 3467 /* correctly formed address option */ 3468 continue; 3469 } 3470 if (debug) 3471 addlog(" [invalid]"); 3472 break; 3473 default: 3474 /* Others not supported. */ 3475 if (debug) 3476 addlog(" [rej]"); 3477 break; 3478 } 3479 /* Add the option to rejected list. */ 3480 if (rlen + l > blen) { 3481 if (debug) 3482 addlog(" [overflow]"); 3483 continue; 3484 } 3485 memcpy(r, p, l); 3486 r += l; 3487 rlen += l; 3488 } 3489 3490 if (rlen > 0) { 3491 type = CP_RCR_REJ; 3492 goto end; 3493 } 3494 3495 if (debug) 3496 addlog("\n"); 3497 3498 /* pass 2: parse option values */ 3499 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 3500 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 3501 else 3502 #ifdef INET 3503 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 3504 #else 3505 hisaddr = 0; 3506 #endif 3507 if (debug) 3508 log(LOG_DEBUG, "%s: ipcp parse opt values: ", 3509 ifp->if_xname); 3510 p = (void *)(h + 1); 3511 r = buf; 3512 rlen = 0; 3513 for (len = origlen; len > 1; len -= l, p += l) { 3514 l = p[1]; 3515 if (l == 0) 3516 break; 3517 3518 if (debug) 3519 addlog(" %s", sppp_ipcp_opt_name(*p)); 3520 switch (p[0]) { 3521 #ifdef notyet 3522 case IPCP_OPT_COMPRESSION: 3523 continue; 3524 #endif 3525 case IPCP_OPT_ADDRESS: 3526 desiredaddr = p[2] << 24 | p[3] << 16 | 3527 p[4] << 8 | p[5]; 3528 if (desiredaddr == hisaddr || 3529 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 3530 /* 3531 * Peer's address is same as our value, 3532 * this is agreeable. Gonna conf-ack 3533 * it. 3534 */ 3535 if (debug) 3536 addlog(" %s [ack]", 3537 sppp_dotted_quad(hisaddr)); 3538 /* record that we've seen it already */ 3539 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 3540 sp->ipcp.req_hisaddr = desiredaddr; 3541 hisaddr = desiredaddr; 3542 continue; 3543 } 3544 /* 3545 * The address wasn't agreeable. This is either 3546 * he sent us 0.0.0.0, asking to assign him an 3547 * address, or he send us another address not 3548 * matching our value. Either case, we gonna 3549 * conf-nak it with our value. 3550 */ 3551 if (debug) { 3552 if (desiredaddr == 0) 3553 addlog(" [addr requested]"); 3554 else 3555 addlog(" %s [not agreed]", 3556 sppp_dotted_quad(desiredaddr)); 3557 } 3558 3559 p[2] = hisaddr >> 24; 3560 p[3] = hisaddr >> 16; 3561 p[4] = hisaddr >> 8; 3562 p[5] = hisaddr; 3563 break; 3564 } 3565 if (rlen + l > blen) { 3566 if (debug) 3567 addlog(" [overflow]"); 3568 continue; 3569 } 3570 /* Add the option to nak'ed list. */ 3571 memcpy(r, p, l); 3572 r += l; 3573 rlen += l; 3574 } 3575 3576 if (rlen > 0) { 3577 type = CP_RCR_NAK; 3578 } else { 3579 if ((sp->ipcp.flags & IPCP_HISADDR_SEEN) == 0) { 3580 /* 3581 * If we are about to conf-ack the request, but haven't seen 3582 * his address so far, gonna conf-nak it instead, with the 3583 * `address' option present and our idea of his address being 3584 * filled in there, to request negotiation of both addresses. 3585 * 3586 * XXX This can result in an endless req - nak loop if peer 3587 * doesn't want to send us his address. Q: What should we do 3588 * about it? XXX A: implement the max-failure counter. 3589 */ 3590 buf[0] = IPCP_OPT_ADDRESS; 3591 buf[1] = 6; 3592 buf[2] = hisaddr >> 24; 3593 buf[3] = hisaddr >> 16; 3594 buf[4] = hisaddr >> 8; 3595 buf[5] = hisaddr; 3596 rlen = 6; 3597 if (debug) 3598 addlog(" still need hisaddr"); 3599 type = CP_RCR_NAK; 3600 } else { 3601 type = CP_RCR_ACK; 3602 rlen = origlen; 3603 memcpy(r, h + 1, rlen); 3604 } 3605 } 3606 3607 end: 3608 if (debug) 3609 addlog("\n"); 3610 3611 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 3612 if (buf != NULL) 3613 kmem_intr_free(buf, blen); 3614 } else { 3615 *msgbuf = buf; 3616 *buflen = blen; 3617 *msglen = rlen; 3618 } 3619 3620 return type; 3621 } 3622 3623 /* 3624 * Analyze the IPCP Configure-Reject option list, and adjust our 3625 * negotiation. 3626 */ 3627 static void 3628 sppp_ipcp_confrej(struct sppp *sp, struct lcp_header *h, int len) 3629 { 3630 u_char *p, l; 3631 struct ifnet *ifp = &sp->pp_if; 3632 int debug = ifp->if_flags & IFF_DEBUG; 3633 3634 KASSERT(SPPP_WLOCKED(sp)); 3635 3636 if (len <= sizeof(*h)) 3637 return; 3638 3639 len -= sizeof(*h); 3640 3641 if (debug) 3642 log(LOG_DEBUG, "%s: ipcp rej opts:", 3643 ifp->if_xname); 3644 3645 p = (void *)(h + 1); 3646 for (; len > 1; len -= l, p += l) { 3647 l = p[1]; 3648 if (l == 0) 3649 break; 3650 3651 /* Sanity check option length */ 3652 if (l > len) { 3653 /* XXX should we just RXJ? */ 3654 addlog("%s: malicious IPCP option received, dropping\n", 3655 ifp->if_xname); 3656 goto end; 3657 } 3658 if (debug) 3659 addlog(" %s", sppp_ipcp_opt_name(*p)); 3660 switch (p[0]) { 3661 case IPCP_OPT_ADDRESS: 3662 /* 3663 * Peer doesn't grok address option. This is 3664 * bad. XXX Should we better give up here? 3665 */ 3666 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3667 break; 3668 #ifdef notyet 3669 case IPCP_OPT_COMPRESS: 3670 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_COMPRESS); 3671 break; 3672 #endif 3673 case IPCP_OPT_PRIMDNS: 3674 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3675 break; 3676 3677 case IPCP_OPT_SECDNS: 3678 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3679 break; 3680 } 3681 } 3682 if (debug) 3683 addlog("\n"); 3684 end: 3685 return; 3686 } 3687 3688 /* 3689 * Analyze the IPCP Configure-NAK option list, and adjust our 3690 * negotiation. 3691 */ 3692 static void 3693 sppp_ipcp_confnak(struct sppp *sp, struct lcp_header *h, int len) 3694 { 3695 u_char *p, l; 3696 struct ifnet *ifp = &sp->pp_if; 3697 int debug = ifp->if_flags & IFF_DEBUG; 3698 uint32_t wantaddr; 3699 3700 KASSERT(SPPP_WLOCKED(sp)); 3701 3702 len -= sizeof(*h); 3703 3704 if (debug) 3705 log(LOG_DEBUG, "%s: ipcp nak opts:", 3706 ifp->if_xname); 3707 3708 p = (void *)(h + 1); 3709 for (; len > 1; len -= l, p += l) { 3710 l = p[1]; 3711 if (l == 0) 3712 break; 3713 3714 /* Sanity check option length */ 3715 if (l > len) { 3716 /* XXX should we just RXJ? */ 3717 addlog("%s: malicious IPCP option received, dropping\n", 3718 ifp->if_xname); 3719 return; 3720 } 3721 if (debug) 3722 addlog(" %s", sppp_ipcp_opt_name(*p)); 3723 switch (*p) { 3724 case IPCP_OPT_ADDRESS: 3725 /* 3726 * Peer doesn't like our local IP address. See 3727 * if we can do something for him. We'll drop 3728 * him our address then. 3729 */ 3730 if (len >= 6 && l == 6) { 3731 wantaddr = p[2] << 24 | p[3] << 16 | 3732 p[4] << 8 | p[5]; 3733 SET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3734 if (debug) 3735 addlog(" [wantaddr %s]", 3736 sppp_dotted_quad(wantaddr)); 3737 /* 3738 * When doing dynamic address assignment, 3739 * we accept his offer. Otherwise, we 3740 * ignore it and thus continue to negotiate 3741 * our already existing value. 3742 */ 3743 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3744 if (debug) 3745 addlog(" [agree]"); 3746 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3747 sp->ipcp.req_myaddr = wantaddr; 3748 } 3749 } 3750 break; 3751 3752 case IPCP_OPT_PRIMDNS: 3753 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS) && 3754 len >= 6 && l == 6) { 3755 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3756 p[4] << 8 | p[5]; 3757 } 3758 break; 3759 3760 case IPCP_OPT_SECDNS: 3761 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS) && 3762 len >= 6 && l == 6) { 3763 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3764 p[4] << 8 | p[5]; 3765 } 3766 break; 3767 #ifdef notyet 3768 case IPCP_OPT_COMPRESS: 3769 /* 3770 * Peer wants different compression parameters. 3771 */ 3772 break; 3773 #endif 3774 } 3775 } 3776 if (debug) 3777 addlog("\n"); 3778 } 3779 3780 static void 3781 sppp_ipcp_tlu(struct sppp *sp) 3782 { 3783 #ifdef INET 3784 KASSERT(SPPP_WLOCKED(sp)); 3785 /* we are up. Set addresses and notify anyone interested */ 3786 sppp_set_ip_addrs(sp); 3787 #endif 3788 } 3789 3790 static void 3791 sppp_ipcp_scr(struct sppp *sp) 3792 { 3793 uint8_t opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3794 #ifdef INET 3795 uint32_t ouraddr; 3796 #endif 3797 int i = 0; 3798 3799 KASSERT(SPPP_WLOCKED(sp)); 3800 3801 #ifdef notyet 3802 if (ISSET(sp->ipcp.opts,SPPP_IPCP_OPT_COMPRESSION)) { 3803 opt[i++] = IPCP_OPT_COMPRESSION; 3804 opt[i++] = 6; 3805 opt[i++] = 0; /* VJ header compression */ 3806 opt[i++] = 0x2d; /* VJ header compression */ 3807 opt[i++] = max_slot_id; 3808 opt[i++] = comp_slot_id; 3809 } 3810 #endif 3811 3812 #ifdef INET 3813 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS)) { 3814 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) { 3815 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3816 } else { 3817 kpreempt_disable(); 3818 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3819 kpreempt_enable(); 3820 } 3821 opt[i++] = IPCP_OPT_ADDRESS; 3822 opt[i++] = 6; 3823 opt[i++] = ouraddr >> 24; 3824 opt[i++] = ouraddr >> 16; 3825 opt[i++] = ouraddr >> 8; 3826 opt[i++] = ouraddr; 3827 } 3828 #endif 3829 3830 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS)) { 3831 opt[i++] = IPCP_OPT_PRIMDNS; 3832 opt[i++] = 6; 3833 opt[i++] = sp->dns_addrs[0] >> 24; 3834 opt[i++] = sp->dns_addrs[0] >> 16; 3835 opt[i++] = sp->dns_addrs[0] >> 8; 3836 opt[i++] = sp->dns_addrs[0]; 3837 } 3838 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS)) { 3839 opt[i++] = IPCP_OPT_SECDNS; 3840 opt[i++] = 6; 3841 opt[i++] = sp->dns_addrs[1] >> 24; 3842 opt[i++] = sp->dns_addrs[1] >> 16; 3843 opt[i++] = sp->dns_addrs[1] >> 8; 3844 opt[i++] = sp->dns_addrs[1]; 3845 } 3846 3847 sp->scp[IDX_IPCP].confid = ++sp->scp[IDX_IPCP].seq; 3848 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->scp[IDX_IPCP].confid, i, &opt); 3849 } 3850 3851 /* 3852 *--------------------------------------------------------------------------* 3853 * * 3854 * The IPv6CP implementation. * 3855 * * 3856 *--------------------------------------------------------------------------* 3857 */ 3858 3859 #ifdef INET6 3860 static void 3861 sppp_ipv6cp_init(struct sppp *sp) 3862 { 3863 3864 KASSERT(SPPP_WLOCKED(sp)); 3865 3866 sppp_cp_init(&ipv6cp, sp); 3867 3868 sp->ipv6cp.opts = 0; 3869 sp->ipv6cp.flags = 0; 3870 } 3871 3872 static void 3873 sppp_ipv6cp_open(struct sppp *sp, void *xcp) 3874 { 3875 STDDCL; 3876 struct in6_addr myaddr, hisaddr; 3877 3878 KASSERT(SPPP_WLOCKED(sp)); 3879 KASSERT(!cpu_softintr_p()); 3880 3881 #ifdef IPV6CP_MYIFID_DYN 3882 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3883 #else 3884 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3885 #endif 3886 3887 kpreempt_disable(); 3888 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3889 kpreempt_enable(); 3890 /* 3891 * If we don't have our address, this probably means our 3892 * interface doesn't want to talk IPv6 at all. (This could 3893 * be the case if somebody wants to speak only IPX, for 3894 * example.) Don't open IPv6CP in this case. 3895 */ 3896 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3897 /* XXX this message should go away */ 3898 if (debug) 3899 log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n", 3900 ifp->if_xname); 3901 return; 3902 } 3903 3904 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3905 SET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 3906 sppp_open_event(sp, xcp); 3907 } 3908 3909 /* 3910 * Analyze a configure request. Return true if it was agreeable, and 3911 * caused action sca, false if it has been rejected or nak'ed, and 3912 * caused action scn. (The return value is used to make the state 3913 * transition decision in the state automaton.) 3914 */ 3915 static enum cp_rcr_type 3916 sppp_ipv6cp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 3917 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 3918 { 3919 u_char *buf, *r, *p, l, blen; 3920 struct ifnet *ifp = &sp->pp_if; 3921 int rlen, len, debug = ifp->if_flags & IFF_DEBUG; 3922 struct in6_addr myaddr, desiredaddr, suggestaddr; 3923 enum cp_rcr_type type; 3924 int ifidcount; 3925 int collision, nohisaddr; 3926 char ip6buf[INET6_ADDRSTRLEN]; 3927 3928 KASSERT(SPPP_WLOCKED(sp)); 3929 3930 type = CP_RCR_NONE; 3931 origlen -= sizeof(*h); 3932 3933 if (origlen < 0) 3934 return CP_RCR_DROP; 3935 3936 /* 3937 * Make sure to allocate a buf that can at least hold a 3938 * conf-nak with an `address' option. We might need it below. 3939 */ 3940 blen = MAX(6, origlen); 3941 3942 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 3943 if (buf == NULL) 3944 return CP_RCR_DROP; 3945 3946 /* pass 1: see if we can recognize them */ 3947 if (debug) 3948 log(LOG_DEBUG, "%s: ipv6cp parse opts:", 3949 ifp->if_xname); 3950 p = (void *)(h + 1); 3951 r = buf; 3952 rlen = 0; 3953 ifidcount = 0; 3954 for (len = origlen; len > 1; len -= l, p += l) { 3955 l = p[1]; 3956 if (l == 0) 3957 break; 3958 3959 /* Sanity check option length */ 3960 if (l > len) { 3961 /* XXX just RXJ? */ 3962 addlog("%s: received malicious IPCPv6 option, " 3963 "dropping\n", ifp->if_xname); 3964 type = CP_RCR_ERR; 3965 goto end; 3966 } 3967 if (debug) 3968 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3969 switch (p[0]) { 3970 case IPV6CP_OPT_IFID: 3971 if (len >= 10 && l == 10 && ifidcount == 0) { 3972 /* correctly formed address option */ 3973 ifidcount++; 3974 continue; 3975 } 3976 if (debug) 3977 addlog(" [invalid]"); 3978 break; 3979 #ifdef notyet 3980 case IPV6CP_OPT_COMPRESSION: 3981 if (len >= 4 && l >= 4) { 3982 /* correctly formed compress option */ 3983 continue; 3984 } 3985 if (debug) 3986 addlog(" [invalid]"); 3987 break; 3988 #endif 3989 default: 3990 /* Others not supported. */ 3991 if (debug) 3992 addlog(" [rej]"); 3993 break; 3994 } 3995 if (rlen + l > blen) { 3996 if (debug) 3997 addlog(" [overflow]"); 3998 continue; 3999 } 4000 /* Add the option to rejected list. */ 4001 memcpy(r, p, l); 4002 r += l; 4003 rlen += l; 4004 } 4005 4006 if (rlen > 0) { 4007 type = CP_RCR_REJ; 4008 goto end; 4009 } 4010 4011 if (debug) 4012 addlog("\n"); 4013 4014 /* pass 2: parse option values */ 4015 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4016 if (debug) 4017 log(LOG_DEBUG, "%s: ipv6cp parse opt values: ", 4018 ifp->if_xname); 4019 p = (void *)(h + 1); 4020 r = buf; 4021 rlen = 0; 4022 type = CP_RCR_ACK; 4023 for (len = origlen; len > 1; len -= l, p += l) { 4024 l = p[1]; 4025 if (l == 0) 4026 break; 4027 4028 if (debug) 4029 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4030 switch (p[0]) { 4031 #ifdef notyet 4032 case IPV6CP_OPT_COMPRESSION: 4033 continue; 4034 #endif 4035 case IPV6CP_OPT_IFID: 4036 memset(&desiredaddr, 0, sizeof(desiredaddr)); 4037 memcpy(&desiredaddr.s6_addr[8], &p[2], 8); 4038 collision = (memcmp(&desiredaddr.s6_addr[8], 4039 &myaddr.s6_addr[8], 8) == 0); 4040 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 4041 4042 desiredaddr.s6_addr16[0] = htons(0xfe80); 4043 (void)in6_setscope(&desiredaddr, &sp->pp_if, NULL); 4044 4045 if (!collision && !nohisaddr) { 4046 /* no collision, hisaddr known - Conf-Ack */ 4047 type = CP_RCR_ACK; 4048 memcpy(sp->ipv6cp.my_ifid, &myaddr.s6_addr[8], 4049 sizeof(sp->ipv6cp.my_ifid)); 4050 memcpy(sp->ipv6cp.his_ifid, 4051 &desiredaddr.s6_addr[8], 4052 sizeof(sp->ipv6cp.my_ifid)); 4053 4054 if (debug) { 4055 addlog(" %s [%s]", 4056 IN6_PRINT(ip6buf, &desiredaddr), 4057 sppp_cp_type_name(CONF_ACK)); 4058 } 4059 continue; 4060 } 4061 4062 memset(&suggestaddr, 0, sizeof(suggestaddr)); 4063 if (collision && nohisaddr) { 4064 /* collision, hisaddr unknown - Conf-Rej */ 4065 type = CP_RCR_REJ; 4066 memset(&p[2], 0, 8); 4067 } else { 4068 /* 4069 * - no collision, hisaddr unknown, or 4070 * - collision, hisaddr known 4071 * Conf-Nak, suggest hisaddr 4072 */ 4073 type = CP_RCR_NAK; 4074 sppp_suggest_ip6_addr(sp, &suggestaddr); 4075 memcpy(&p[2], &suggestaddr.s6_addr[8], 8); 4076 } 4077 if (debug) { 4078 int ctype = type == CP_RCR_REJ ? CONF_REJ : CONF_NAK; 4079 addlog(" %s [%s]", IN6_PRINT(ip6buf, &desiredaddr), 4080 sppp_cp_type_name(ctype)); 4081 } 4082 break; 4083 } 4084 if (rlen + l > blen) { 4085 if (debug) 4086 addlog(" [overflow]"); 4087 continue; 4088 } 4089 /* Add the option to nak'ed list. */ 4090 memcpy(r, p, l); 4091 r += l; 4092 rlen += l; 4093 } 4094 4095 if (rlen > 0) { 4096 if (type != CP_RCR_ACK) { 4097 if (debug) { 4098 int ctype ; 4099 ctype = type == CP_RCR_REJ ? 4100 CONF_REJ : CONF_NAK; 4101 addlog(" send %s suggest %s\n", 4102 sppp_cp_type_name(ctype), 4103 IN6_PRINT(ip6buf, &suggestaddr)); 4104 } 4105 } 4106 #ifdef notdef 4107 if (type == CP_RCR_ACK) 4108 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 4109 #endif 4110 } else { 4111 if (type == CP_RCR_ACK) { 4112 rlen = origlen; 4113 memcpy(r, h + 1, rlen); 4114 } 4115 } 4116 end: 4117 if (debug) 4118 addlog("\n"); 4119 4120 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 4121 if (buf != NULL) 4122 kmem_intr_free(buf, blen); 4123 } else { 4124 *msgbuf = buf; 4125 *buflen = blen; 4126 *msglen = rlen; 4127 } 4128 4129 return type; 4130 } 4131 4132 /* 4133 * Analyze the IPv6CP Configure-Reject option list, and adjust our 4134 * negotiation. 4135 */ 4136 static void 4137 sppp_ipv6cp_confrej(struct sppp *sp, struct lcp_header *h, int len) 4138 { 4139 u_char *p, l; 4140 struct ifnet *ifp = &sp->pp_if; 4141 int debug = ifp->if_flags & IFF_DEBUG; 4142 4143 KASSERT(SPPP_WLOCKED(sp)); 4144 4145 if (len <= sizeof(*h)) 4146 return; 4147 4148 len -= sizeof(*h); 4149 4150 if (debug) 4151 log(LOG_DEBUG, "%s: ipv6cp rej opts:", 4152 ifp->if_xname); 4153 4154 p = (void *)(h + 1); 4155 for (; len > 1; len -= l, p += l) { 4156 l = p[1]; 4157 if (l == 0) 4158 break; 4159 4160 if (l > len) { 4161 /* XXX just RXJ? */ 4162 addlog("%s: received malicious IPCPv6 option, " 4163 "dropping\n", ifp->if_xname); 4164 goto end; 4165 } 4166 if (debug) 4167 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4168 switch (p[0]) { 4169 case IPV6CP_OPT_IFID: 4170 /* 4171 * Peer doesn't grok address option. This is 4172 * bad. XXX Should we better give up here? 4173 */ 4174 CLR(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 4175 break; 4176 #ifdef notyet 4177 case IPV6CP_OPT_COMPRESS: 4178 CLR(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_COMPRESS); 4179 break; 4180 #endif 4181 } 4182 } 4183 if (debug) 4184 addlog("\n"); 4185 end: 4186 return; 4187 } 4188 4189 /* 4190 * Analyze the IPv6CP Configure-NAK option list, and adjust our 4191 * negotiation. 4192 */ 4193 static void 4194 sppp_ipv6cp_confnak(struct sppp *sp, struct lcp_header *h, int len) 4195 { 4196 u_char *p, l; 4197 struct ifnet *ifp = &sp->pp_if; 4198 int debug = ifp->if_flags & IFF_DEBUG; 4199 struct in6_addr suggestaddr; 4200 char ip6buf[INET6_ADDRSTRLEN]; 4201 4202 KASSERT(SPPP_WLOCKED(sp)); 4203 4204 if (len <= sizeof(*h)) 4205 return; 4206 4207 len -= sizeof(*h); 4208 4209 if (debug) 4210 log(LOG_DEBUG, "%s: ipv6cp nak opts:", 4211 ifp->if_xname); 4212 4213 p = (void *)(h + 1); 4214 for (; len > 1; len -= l, p += l) { 4215 l = p[1]; 4216 if (l == 0) 4217 break; 4218 4219 if (l > len) { 4220 /* XXX just RXJ? */ 4221 addlog("%s: received malicious IPCPv6 option, " 4222 "dropping\n", ifp->if_xname); 4223 goto end; 4224 } 4225 if (debug) 4226 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4227 switch (p[0]) { 4228 case IPV6CP_OPT_IFID: 4229 /* 4230 * Peer doesn't like our local ifid. See 4231 * if we can do something for him. We'll drop 4232 * him our address then. 4233 */ 4234 if (len < 10 || l != 10) 4235 break; 4236 memset(&suggestaddr, 0, sizeof(suggestaddr)); 4237 suggestaddr.s6_addr16[0] = htons(0xfe80); 4238 (void)in6_setscope(&suggestaddr, &sp->pp_if, NULL); 4239 memcpy(&suggestaddr.s6_addr[8], &p[2], 8); 4240 4241 SET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 4242 if (debug) 4243 addlog(" [suggestaddr %s]", 4244 IN6_PRINT(ip6buf, &suggestaddr)); 4245 #ifdef IPV6CP_MYIFID_DYN 4246 /* 4247 * When doing dynamic address assignment, 4248 * we accept his offer. 4249 */ 4250 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 4251 struct in6_addr lastsuggest; 4252 /* 4253 * If <suggested myaddr from peer> equals to 4254 * <hisaddr we have suggested last time>, 4255 * we have a collision. generate new random 4256 * ifid. 4257 */ 4258 sppp_suggest_ip6_addr(&lastsuggest); 4259 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 4260 lastsuggest)) { 4261 if (debug) 4262 addlog(" [random]"); 4263 sppp_gen_ip6_addr(sp, &suggestaddr); 4264 } 4265 sppp_set_ip6_addr(sp, &suggestaddr, 0); 4266 if (debug) 4267 addlog(" [agree]"); 4268 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 4269 } 4270 #else 4271 /* 4272 * Since we do not do dynamic address assignment, 4273 * we ignore it and thus continue to negotiate 4274 * our already existing value. This can possibly 4275 * go into infinite request-reject loop. 4276 * 4277 * This is not likely because we normally use 4278 * ifid based on MAC-address. 4279 * If you have no ethernet card on the node, too bad. 4280 * XXX should we use fail_counter? 4281 */ 4282 #endif 4283 break; 4284 #ifdef notyet 4285 case IPV6CP_OPT_COMPRESS: 4286 /* 4287 * Peer wants different compression parameters. 4288 */ 4289 break; 4290 #endif 4291 } 4292 } 4293 if (debug) 4294 addlog("\n"); 4295 end: 4296 return; 4297 } 4298 4299 static void 4300 sppp_ipv6cp_tlu(struct sppp *sp) 4301 { 4302 4303 KASSERT(SPPP_WLOCKED(sp)); 4304 /* we are up - notify isdn daemon */ 4305 sppp_notify_con_wlocked(sp); 4306 } 4307 4308 static void 4309 sppp_ipv6cp_scr(struct sppp *sp) 4310 { 4311 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 4312 struct in6_addr ouraddr; 4313 int i = 0; 4314 4315 KASSERT(SPPP_WLOCKED(sp)); 4316 4317 if (ISSET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID)) { 4318 kpreempt_disable(); 4319 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 4320 kpreempt_enable(); 4321 4322 opt[i++] = IPV6CP_OPT_IFID; 4323 opt[i++] = 10; 4324 memcpy(&opt[i], &ouraddr.s6_addr[8], 8); 4325 i += 8; 4326 } 4327 4328 #ifdef notyet 4329 if (ISSET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_COMPRESSION)) { 4330 opt[i++] = IPV6CP_OPT_COMPRESSION; 4331 opt[i++] = 4; 4332 opt[i++] = 0; /* TBD */ 4333 opt[i++] = 0; /* TBD */ 4334 /* variable length data may follow */ 4335 } 4336 #endif 4337 4338 sp->scp[IDX_IPV6CP].confid = ++sp->scp[IDX_IPV6CP].seq; 4339 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->scp[IDX_IPV6CP].confid, i, &opt); 4340 } 4341 #else /*INET6*/ 4342 static void 4343 sppp_ipv6cp_init(struct sppp *sp) 4344 { 4345 4346 KASSERT(SPPP_WLOCKED(sp)); 4347 } 4348 4349 static void 4350 sppp_ipv6cp_open(struct sppp *sp, void *xcp) 4351 { 4352 4353 KASSERT(SPPP_WLOCKED(sp)); 4354 } 4355 4356 static enum cp_rcr_type 4357 sppp_ipv6cp_confreq(struct sppp *sp, struct lcp_header *h, 4358 int len, uint8_t **msgbuf, size_t *buflen, size_t *msglen) 4359 { 4360 4361 KASSERT(SPPP_WLOCKED(sp)); 4362 return 0; 4363 } 4364 4365 static void 4366 sppp_ipv6cp_confrej(struct sppp *sp, struct lcp_header *h, 4367 int len) 4368 { 4369 4370 KASSERT(SPPP_WLOCKED(sp)); 4371 } 4372 4373 static void 4374 sppp_ipv6cp_confnak(struct sppp *sp, struct lcp_header *h, 4375 int len) 4376 { 4377 4378 KASSERT(SPPP_WLOCKED(sp)); 4379 } 4380 4381 static void 4382 sppp_ipv6cp_tlu(struct sppp *sp) 4383 { 4384 4385 KASSERT(SPPP_WLOCKED(sp)); 4386 } 4387 4388 static void 4389 sppp_ipv6cp_scr(struct sppp *sp) 4390 { 4391 4392 KASSERT(SPPP_WLOCKED(sp)); 4393 } 4394 #endif /*INET6*/ 4395 4396 /* 4397 *--------------------------------------------------------------------------* 4398 * * 4399 * The CHAP implementation. * 4400 * * 4401 *--------------------------------------------------------------------------* 4402 */ 4403 /* 4404 * The authentication protocols is implemented on the state machine for 4405 * control protocols. And it uses following actions and events. 4406 * 4407 * Actions: 4408 * - scr: send CHAP_CHALLENGE and CHAP_RESPONSE 4409 * - sca: send CHAP_SUCCESS 4410 * - scn: send CHAP_FAILURE and shutdown lcp 4411 * Events: 4412 * - RCR+: receive CHAP_RESPONSE containing correct digest 4413 * - RCR-: receive CHAP_RESPONSE containing wrong digest 4414 * - RCA: receive CHAP_SUCCESS 4415 * - RCN: (this event is unused) 4416 * - TO+: re-send CHAP_CHALLENGE and CHAP_RESPONSE 4417 * - TO-: this layer finish 4418 */ 4419 4420 /* 4421 * Handle incoming CHAP packets. 4422 */ 4423 void 4424 sppp_chap_input(struct sppp *sp, struct mbuf *m) 4425 { 4426 STDDCL; 4427 struct lcp_header *h; 4428 int len, x; 4429 u_char *value, *name, digest[sizeof(sp->chap.challenge)]; 4430 int value_len, name_len; 4431 MD5_CTX ctx; 4432 4433 len = m->m_pkthdr.len; 4434 if (len < 4) { 4435 if (debug) 4436 log(LOG_DEBUG, 4437 "%s: chap invalid packet length: %d bytes\n", 4438 ifp->if_xname, len); 4439 return; 4440 } 4441 h = mtod(m, struct lcp_header *); 4442 if (len > ntohs(h->len)) 4443 len = ntohs(h->len); 4444 4445 SPPP_LOCK(sp, RW_WRITER); 4446 4447 switch (h->type) { 4448 /* challenge, failure and success are his authproto */ 4449 case CHAP_CHALLENGE: 4450 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4451 /* can't do anything useful */ 4452 sp->pp_auth_failures++; 4453 printf("%s: chap input without my name and my secret being set\n", 4454 ifp->if_xname); 4455 break; 4456 } 4457 value = 1 + (u_char *)(h + 1); 4458 value_len = value[-1]; 4459 name = value + value_len; 4460 name_len = len - value_len - 5; 4461 if (name_len < 0) { 4462 if (debug) { 4463 log(LOG_DEBUG, 4464 "%s: chap corrupted challenge " 4465 "<%s id=0x%x len=%d", 4466 ifp->if_xname, 4467 sppp_auth_type_name(PPP_CHAP, h->type), 4468 h->ident, ntohs(h->len)); 4469 if (len > 4) 4470 sppp_print_bytes((u_char *)(h + 1), 4471 len - 4); 4472 addlog(">\n"); 4473 } 4474 break; 4475 } 4476 4477 if (debug) { 4478 log(LOG_DEBUG, 4479 "%s: chap input <%s id=0x%x len=%d name=", 4480 ifp->if_xname, 4481 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 4482 ntohs(h->len)); 4483 sppp_print_string((char *) name, name_len); 4484 addlog(" value-size=%d value=", value_len); 4485 sppp_print_bytes(value, value_len); 4486 addlog(">\n"); 4487 } 4488 4489 /* Compute reply value. */ 4490 MD5Init(&ctx); 4491 MD5Update(&ctx, &h->ident, 1); 4492 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 4493 MD5Update(&ctx, value, value_len); 4494 MD5Final(sp->chap.digest, &ctx); 4495 sp->chap.digest_len = sizeof(sp->chap.digest); 4496 sp->scp[IDX_CHAP].rconfid = h->ident; 4497 4498 sppp_wq_add(sp->wq_cp, &sp->chap.work_challenge_rcvd); 4499 break; 4500 4501 case CHAP_SUCCESS: 4502 if (debug) { 4503 log(LOG_DEBUG, "%s: chap success", 4504 ifp->if_xname); 4505 if (len > 4) { 4506 addlog(": "); 4507 sppp_print_string((char *)(h + 1), len - 4); 4508 } 4509 addlog("\n"); 4510 } 4511 4512 if (h->ident != sp->scp[IDX_CHAP].rconfid) { 4513 if (debug) { 4514 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4515 ifp->if_xname, chap.name, 4516 h->ident, sp->scp[IDX_CHAP].rconfid); 4517 } 4518 if_statinc(ifp, if_ierrors); 4519 break; 4520 } 4521 4522 if (sp->chap.digest_len == 0) { 4523 if (debug) { 4524 log(LOG_DEBUG, 4525 "%s: receive CHAP success without challenge\n", 4526 ifp->if_xname); 4527 } 4528 if_statinc(ifp, if_ierrors); 4529 break; 4530 } 4531 4532 x = splnet(); 4533 sp->pp_auth_failures = 0; 4534 sp->pp_flags &= ~PP_NEEDAUTH; 4535 splx(x); 4536 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4537 sp->chap.digest_len = 0; 4538 4539 if (!ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_SERV)) { 4540 /* 4541 * we are not authenticator for CHAP, 4542 * generate a dummy RCR+ event without CHAP_RESPONSE 4543 */ 4544 sp->scp[IDX_CHAP].rcr_type = CP_RCR_ACK; 4545 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4546 } 4547 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rca); 4548 break; 4549 4550 case CHAP_FAILURE: 4551 if (h->ident != sp->scp[IDX_CHAP].rconfid) { 4552 if (debug) { 4553 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4554 ifp->if_xname, chap.name, 4555 h->ident, sp->scp[IDX_CHAP].rconfid); 4556 } 4557 if_statinc(ifp, if_ierrors); 4558 break; 4559 } 4560 4561 if (sp->chap.digest_len == 0) { 4562 if (debug) { 4563 log(LOG_DEBUG, 4564 "%s: receive CHAP failure without challenge\n", 4565 ifp->if_xname); 4566 } 4567 if_statinc(ifp, if_ierrors); 4568 break; 4569 } 4570 4571 x = splnet(); 4572 sp->pp_auth_failures++; 4573 splx(x); 4574 if (debug) { 4575 log(LOG_INFO, "%s: chap failure", 4576 ifp->if_xname); 4577 if (len > 4) { 4578 addlog(": "); 4579 sppp_print_string((char *)(h + 1), len - 4); 4580 } 4581 addlog("\n"); 4582 } else 4583 log(LOG_INFO, "%s: chap failure\n", 4584 ifp->if_xname); 4585 4586 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4587 sp->chap.digest_len = 0; 4588 /* 4589 * await LCP shutdown by authenticator, 4590 * so we don't have to enqueue sc->scp[IDX_CHAP].work_rcn 4591 */ 4592 break; 4593 4594 /* response is my authproto */ 4595 case CHAP_RESPONSE: 4596 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4597 /* can't do anything useful */ 4598 printf("%s: chap response" 4599 " without his name and his secret being set\n", 4600 ifp->if_xname); 4601 break; 4602 } 4603 value = 1 + (u_char *)(h + 1); 4604 value_len = value[-1]; 4605 name = value + value_len; 4606 name_len = len - value_len - 5; 4607 if (name_len < 0) { 4608 if (debug) { 4609 log(LOG_DEBUG, 4610 "%s: chap corrupted response " 4611 "<%s id=0x%x len=%d", 4612 ifp->if_xname, 4613 sppp_auth_type_name(PPP_CHAP, h->type), 4614 h->ident, ntohs(h->len)); 4615 if (len > 4) 4616 sppp_print_bytes((u_char *)(h + 1), 4617 len - 4); 4618 addlog(">\n"); 4619 } 4620 break; 4621 } 4622 if (h->ident != sp->scp[IDX_CHAP].confid) { 4623 if (debug) 4624 log(LOG_DEBUG, 4625 "%s: chap dropping response for old ID " 4626 "(got %d, expected %d)\n", 4627 ifp->if_xname, 4628 h->ident, sp->scp[IDX_CHAP].confid); 4629 break; 4630 } else { 4631 sp->scp[IDX_CHAP].rconfid = h->ident; 4632 } 4633 4634 if (sp->hisauth.name != NULL && 4635 (name_len != sp->hisauth.name_len 4636 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 4637 log(LOG_INFO, "%s: chap response, his name ", 4638 ifp->if_xname); 4639 sppp_print_string(name, name_len); 4640 addlog(" != expected "); 4641 sppp_print_string(sp->hisauth.name, 4642 sp->hisauth.name_len); 4643 addlog("\n"); 4644 4645 /* generate RCR- event */ 4646 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4647 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4648 break; 4649 } 4650 4651 if (debug) { 4652 log(LOG_DEBUG, "%s: chap input(%s) " 4653 "<%s id=0x%x len=%d name=", 4654 ifp->if_xname, 4655 sppp_state_name(sp->scp[IDX_CHAP].state), 4656 sppp_auth_type_name(PPP_CHAP, h->type), 4657 h->ident, ntohs(h->len)); 4658 sppp_print_string((char *)name, name_len); 4659 addlog(" value-size=%d value=", value_len); 4660 sppp_print_bytes(value, value_len); 4661 addlog(">\n"); 4662 } 4663 4664 if (value_len == sizeof(sp->chap.challenge) && 4665 value_len == sizeof(sp->chap.digest)) { 4666 MD5Init(&ctx); 4667 MD5Update(&ctx, &h->ident, 1); 4668 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 4669 MD5Update(&ctx, sp->chap.challenge, sizeof(sp->chap.challenge)); 4670 MD5Final(digest, &ctx); 4671 4672 if (memcmp(digest, value, value_len) == 0) { 4673 sp->scp[IDX_CHAP].rcr_type = CP_RCR_ACK; 4674 if (!ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_PEER) || 4675 sp->chap.rechallenging) { 4676 /* generate a dummy RCA event*/ 4677 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rca); 4678 } 4679 } else { 4680 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4681 } 4682 } else { 4683 if (debug) 4684 log(LOG_DEBUG, 4685 "%s: chap bad hash value length: " 4686 "%d bytes, should be %zu\n", 4687 ifp->if_xname, value_len, 4688 sizeof(sp->chap.challenge)); 4689 4690 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4691 } 4692 4693 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4694 break; 4695 4696 default: 4697 /* Unknown CHAP packet type -- ignore. */ 4698 if (debug) { 4699 log(LOG_DEBUG, "%s: chap unknown input(%s) " 4700 "<0x%x id=0x%xh len=%d", 4701 ifp->if_xname, 4702 sppp_state_name(sp->scp[IDX_CHAP].state), 4703 h->type, h->ident, ntohs(h->len)); 4704 if (len > 4) 4705 sppp_print_bytes((u_char *)(h + 1), len - 4); 4706 addlog(">\n"); 4707 } 4708 break; 4709 4710 } 4711 4712 SPPP_UNLOCK(sp); 4713 } 4714 4715 static void 4716 sppp_chap_init(struct sppp *sp) 4717 { 4718 4719 KASSERT(SPPP_WLOCKED(sp)); 4720 4721 sppp_cp_init(&chap, sp); 4722 4723 SPPP_WQ_SET(&sp->chap.work_challenge_rcvd, 4724 sppp_chap_rcv_challenge_event, &chap); 4725 } 4726 4727 static void 4728 sppp_chap_open(struct sppp *sp, void *xcp) 4729 { 4730 4731 KASSERT(SPPP_WLOCKED(sp)); 4732 4733 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4734 sp->chap.digest_len = 0; 4735 sp->chap.rechallenging = false; 4736 sp->chap.response_rcvd = false; 4737 sppp_open_event(sp, xcp); 4738 } 4739 4740 static void 4741 sppp_chap_tlu(struct sppp *sp) 4742 { 4743 STDDCL; 4744 int i, x; 4745 4746 KASSERT(SPPP_WLOCKED(sp)); 4747 4748 i = 0; 4749 sp->scp[IDX_CHAP].rst_counter = sp->lcp.max_configure; 4750 x = splnet(); 4751 sp->pp_auth_failures = 0; 4752 splx(x); 4753 4754 log(LOG_DEBUG, "%s: chap %s", ifp->if_xname, 4755 sp->pp_phase == SPPP_PHASE_NETWORK ? "reconfirmed" : "tlu"); 4756 4757 /* 4758 * Some broken CHAP implementations (Conware CoNet, firmware 4759 * 4.0.?) don't want to re-authenticate their CHAP once the 4760 * initial challenge-response exchange has taken place. 4761 * Provide for an option to avoid rechallenges. 4762 */ 4763 if (ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_SERV) && 4764 (sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4765 /* 4766 * Compute the re-challenge timeout. This will yield 4767 * a number between 300 and 810 seconds. 4768 */ 4769 i = 300 + ((unsigned)(cprng_fast32() & 0xff00) >> 7); 4770 callout_schedule(&sp->scp[IDX_CHAP].ch, i * hz); 4771 4772 if (debug) { 4773 addlog(", next rechallenge in %d seconds", i); 4774 } 4775 } 4776 4777 addlog("\n"); 4778 4779 /* 4780 * If we are already in phase network, we are done here. This 4781 * is the case if this is a dummy tlu event after a re-challenge. 4782 */ 4783 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4784 sppp_phase_network(sp); 4785 } 4786 4787 static void 4788 sppp_chap_scr(struct sppp *sp) 4789 { 4790 uint32_t *ch; 4791 u_char clen, dsize; 4792 int role; 4793 4794 KASSERT(SPPP_WLOCKED(sp)); 4795 4796 role = sppp_auth_role(&chap, sp); 4797 4798 if (ISSET(role, SPPP_AUTH_SERV) && 4799 !sp->chap.response_rcvd) { 4800 /* we are authenticator for CHAP, send challenge */ 4801 ch = (uint32_t *)sp->chap.challenge; 4802 clen = sizeof(sp->chap.challenge); 4803 /* Compute random challenge. */ 4804 cprng_strong(kern_cprng, ch, clen, 0); 4805 4806 sp->scp[IDX_CHAP].confid = ++sp->scp[IDX_CHAP].seq; 4807 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->scp[IDX_CHAP].confid, 4808 sizeof(clen), (const char *)&clen, 4809 sizeof(sp->chap.challenge), sp->chap.challenge, 4810 0); 4811 } 4812 4813 if (ISSET(role, SPPP_AUTH_PEER) && 4814 sp->chap.digest_len > 0) { 4815 /* we are peer for CHAP, send response */ 4816 dsize = sp->chap.digest_len; 4817 4818 sppp_auth_send(&chap, sp, CHAP_RESPONSE, sp->scp[IDX_CHAP].rconfid, 4819 sizeof(dsize), (const char *)&dsize, 4820 sp->chap.digest_len, sp->chap.digest, 4821 sp->myauth.name_len, sp->myauth.name, 0); 4822 } 4823 } 4824 4825 static void 4826 sppp_chap_rcv_challenge_event(struct sppp *sp, void *xcp) 4827 { 4828 const struct cp *cp = xcp; 4829 4830 KASSERT(!cpu_softintr_p()); 4831 4832 sp->chap.rechallenging = false; 4833 4834 switch (sp->scp[IDX_CHAP].state) { 4835 case STATE_REQ_SENT: 4836 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 4837 cp->scr(sp); 4838 break; 4839 case STATE_OPENED: 4840 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 4841 cp->scr(sp); 4842 break; 4843 } 4844 } 4845 4846 /* 4847 *--------------------------------------------------------------------------* 4848 * * 4849 * The PAP implementation. * 4850 * * 4851 *--------------------------------------------------------------------------* 4852 */ 4853 /* 4854 * PAP uses following actions and events. 4855 * Actions: 4856 * - scr: send PAP_REQ 4857 * - sca: send PAP_ACK 4858 * - scn: send PAP_NAK 4859 * Events: 4860 * - RCR+: receive PAP_REQ containing correct username and password 4861 * - RCR-: receive PAP_REQ containing wrong username and password 4862 * - RCA: receive PAP_ACK 4863 * - RCN: (this event is unused) 4864 * - TO+: re-send PAP_REQ 4865 * - TO-: this layer finish 4866 */ 4867 4868 /* 4869 * Handle incoming PAP packets. */ 4870 static void 4871 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4872 { 4873 STDDCL; 4874 struct lcp_header *h; 4875 int len, x; 4876 char *name, *secret; 4877 int name_len, secret_len; 4878 4879 /* 4880 * Malicious input might leave this uninitialized, so 4881 * init to an impossible value. 4882 */ 4883 secret_len = -1; 4884 4885 len = m->m_pkthdr.len; 4886 if (len < 5) { 4887 if (debug) 4888 log(LOG_DEBUG, 4889 "%s: pap invalid packet length: %d bytes\n", 4890 ifp->if_xname, len); 4891 return; 4892 } 4893 h = mtod(m, struct lcp_header *); 4894 if (len > ntohs(h->len)) 4895 len = ntohs(h->len); 4896 4897 SPPP_LOCK(sp, RW_WRITER); 4898 4899 switch (h->type) { 4900 /* PAP request is my authproto */ 4901 case PAP_REQ: 4902 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4903 /* can't do anything useful */ 4904 printf("%s: pap request" 4905 " without his name and his secret being set\n", 4906 ifp->if_xname); 4907 break; 4908 } 4909 name = 1 + (u_char *)(h + 1); 4910 name_len = name[-1]; 4911 secret = name + name_len + 1; 4912 if (name_len > len - 6 || 4913 (secret_len = secret[-1]) > len - 6 - name_len) { 4914 if (debug) { 4915 log(LOG_DEBUG, "%s: pap corrupted input " 4916 "<%s id=0x%x len=%d", 4917 ifp->if_xname, 4918 sppp_auth_type_name(PPP_PAP, h->type), 4919 h->ident, ntohs(h->len)); 4920 if (len > 4) 4921 sppp_print_bytes((u_char *)(h + 1), 4922 len - 4); 4923 addlog(">\n"); 4924 } 4925 break; 4926 } 4927 if (debug) { 4928 log(LOG_DEBUG, "%s: pap input(%s) " 4929 "<%s id=0x%x len=%d name=", 4930 ifp->if_xname, 4931 sppp_state_name(sp->scp[IDX_PAP].state), 4932 sppp_auth_type_name(PPP_PAP, h->type), 4933 h->ident, ntohs(h->len)); 4934 sppp_print_string((char *)name, name_len); 4935 addlog(" secret="); 4936 sppp_print_string((char *)secret, secret_len); 4937 addlog(">\n"); 4938 } 4939 4940 sp->scp[IDX_PAP].rconfid = h->ident; 4941 4942 if (name_len == sp->hisauth.name_len && 4943 memcmp(name, sp->hisauth.name, name_len) == 0 && 4944 secret_len == sp->hisauth.secret_len && 4945 memcmp(secret, sp->hisauth.secret, secret_len) == 0) { 4946 sp->scp[IDX_PAP].rcr_type = CP_RCR_ACK; 4947 if (!ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_PEER)) { 4948 /* generate a dummy RCA event*/ 4949 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rca); 4950 } 4951 } else { 4952 sp->scp[IDX_PAP].rcr_type = CP_RCR_NAK; 4953 } 4954 4955 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rcr); 4956 break; 4957 4958 /* ack and nak are his authproto */ 4959 case PAP_ACK: 4960 if (debug) { 4961 log(LOG_DEBUG, "%s: pap success", 4962 ifp->if_xname); 4963 name = 1 + (u_char *)(h + 1); 4964 name_len = name[-1]; 4965 if (len > 5 && name_len < len+4) { 4966 addlog(": "); 4967 sppp_print_string(name, name_len); 4968 } 4969 addlog("\n"); 4970 } 4971 4972 if (h->ident != sp->scp[IDX_PAP].confid) { 4973 if (debug) { 4974 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4975 ifp->if_xname, pap.name, 4976 h->ident, sp->scp[IDX_PAP].rconfid); 4977 } 4978 if_statinc(ifp, if_ierrors); 4979 break; 4980 } 4981 4982 x = splnet(); 4983 sp->pp_auth_failures = 0; 4984 sp->pp_flags &= ~PP_NEEDAUTH; 4985 splx(x); 4986 4987 /* we are not authenticator, generate a dummy RCR+ event */ 4988 if (!ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_SERV)) { 4989 sp->scp[IDX_PAP].rcr_type = CP_RCR_ACK; 4990 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rcr); 4991 } 4992 4993 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rca); 4994 break; 4995 4996 case PAP_NAK: 4997 if (debug) { 4998 log(LOG_INFO, "%s: pap failure", 4999 ifp->if_xname); 5000 name = 1 + (u_char *)(h + 1); 5001 name_len = name[-1]; 5002 if (len > 5 && name_len < len+4) { 5003 addlog(": "); 5004 sppp_print_string(name, name_len); 5005 } 5006 addlog("\n"); 5007 } else 5008 log(LOG_INFO, "%s: pap failure\n", 5009 ifp->if_xname); 5010 5011 if (h->ident != sp->scp[IDX_PAP].confid) { 5012 if (debug) { 5013 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 5014 ifp->if_xname, pap.name, 5015 h->ident, sp->scp[IDX_PAP].rconfid); 5016 } 5017 if_statinc(ifp, if_ierrors); 5018 break; 5019 } 5020 5021 sp->pp_auth_failures++; 5022 /* 5023 * await LCP shutdown by authenticator, 5024 * so we don't have to enqueue sc->scp[IDX_PAP].work_rcn 5025 */ 5026 break; 5027 5028 default: 5029 /* Unknown PAP packet type -- ignore. */ 5030 if (debug) { 5031 log(LOG_DEBUG, "%s: pap corrupted input " 5032 "<0x%x id=0x%x len=%d", 5033 ifp->if_xname, 5034 h->type, h->ident, ntohs(h->len)); 5035 if (len > 4) 5036 sppp_print_bytes((u_char *)(h + 1), len - 4); 5037 addlog(">\n"); 5038 } 5039 break; 5040 } 5041 5042 SPPP_UNLOCK(sp); 5043 } 5044 5045 static void 5046 sppp_pap_init(struct sppp *sp) 5047 { 5048 5049 KASSERT(SPPP_WLOCKED(sp)); 5050 sppp_cp_init(&pap, sp); 5051 } 5052 5053 static void 5054 sppp_pap_tlu(struct sppp *sp) 5055 { 5056 STDDCL; 5057 int x; 5058 5059 sp->scp[IDX_PAP].rst_counter = sp->lcp.max_configure; 5060 5061 if (debug) 5062 log(LOG_DEBUG, "%s: %s tlu\n", 5063 ifp->if_xname, pap.name); 5064 5065 x = splnet(); 5066 sp->pp_auth_failures = 0; 5067 splx(x); 5068 5069 if (sp->pp_phase < SPPP_PHASE_NETWORK) 5070 sppp_phase_network(sp); 5071 } 5072 5073 static void 5074 sppp_pap_scr(struct sppp *sp) 5075 { 5076 u_char idlen, pwdlen; 5077 5078 KASSERT(SPPP_WLOCKED(sp)); 5079 5080 if (ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_PEER) && 5081 sp->scp[IDX_PAP].state != STATE_ACK_RCVD) { 5082 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 5083 log(LOG_DEBUG, "%s: couldn't send PAP_REQ " 5084 "because of no name or no secret\n", 5085 sp->pp_if.if_xname); 5086 } else { 5087 sp->scp[IDX_PAP].confid = ++sp->scp[IDX_PAP].seq; 5088 pwdlen = sp->myauth.secret_len; 5089 idlen = sp->myauth.name_len; 5090 5091 sppp_auth_send(&pap, sp, PAP_REQ, sp->scp[IDX_PAP].confid, 5092 sizeof idlen, (const char *)&idlen, 5093 idlen, sp->myauth.name, 5094 sizeof pwdlen, (const char *)&pwdlen, 5095 pwdlen, sp->myauth.secret, 5096 0); 5097 } 5098 } 5099 } 5100 5101 /* 5102 * Random miscellaneous functions. 5103 */ 5104 5105 /* 5106 * Send a PAP or CHAP proto packet. 5107 * 5108 * Varadic function, each of the elements for the ellipsis is of type 5109 * ``size_t mlen, const u_char *msg''. Processing will stop iff 5110 * mlen == 0. 5111 * NOTE: never declare variadic functions with types subject to type 5112 * promotion (i.e. u_char). This is asking for big trouble depending 5113 * on the architecture you are on... 5114 */ 5115 5116 static void 5117 sppp_auth_send(const struct cp *cp, struct sppp *sp, 5118 unsigned int type, unsigned int id, 5119 ...) 5120 { 5121 STDDCL; 5122 struct lcp_header *lh; 5123 struct mbuf *m; 5124 u_char *p; 5125 int len; 5126 size_t pkthdrlen; 5127 unsigned int mlen; 5128 const char *msg; 5129 va_list ap; 5130 5131 KASSERT(SPPP_WLOCKED(sp)); 5132 5133 MGETHDR(m, M_DONTWAIT, MT_DATA); 5134 if (! m) 5135 return; 5136 m_reset_rcvif(m); 5137 5138 if (sp->pp_flags & PP_NOFRAMING) { 5139 *mtod(m, uint16_t *) = htons(cp->proto); 5140 pkthdrlen = 2; 5141 lh = (struct lcp_header *)(mtod(m, uint8_t *)+2); 5142 } else { 5143 struct ppp_header *h; 5144 h = mtod(m, struct ppp_header *); 5145 h->address = PPP_ALLSTATIONS; /* broadcast address */ 5146 h->control = PPP_UI; /* Unnumbered Info */ 5147 h->protocol = htons(cp->proto); 5148 pkthdrlen = PPP_HEADER_LEN; 5149 5150 lh = (struct lcp_header *)(h + 1); 5151 } 5152 5153 lh->type = type; 5154 lh->ident = id; 5155 p = (u_char *)(lh + 1); 5156 5157 va_start(ap, id); 5158 len = 0; 5159 5160 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 5161 msg = va_arg(ap, const char *); 5162 len += mlen; 5163 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 5164 va_end(ap); 5165 m_freem(m); 5166 return; 5167 } 5168 5169 memcpy(p, msg, mlen); 5170 p += mlen; 5171 } 5172 va_end(ap); 5173 5174 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 5175 lh->len = htons(LCP_HEADER_LEN + len); 5176 5177 if (debug) { 5178 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 5179 ifp->if_xname, cp->name, 5180 sppp_auth_type_name(cp->proto, lh->type), 5181 lh->ident, ntohs(lh->len)); 5182 if (len) 5183 sppp_print_bytes((u_char *)(lh + 1), len); 5184 addlog(">\n"); 5185 } 5186 if (IF_QFULL(&sp->pp_cpq)) { 5187 IF_DROP(&sp->pp_fastq); 5188 IF_DROP(&ifp->if_snd); 5189 m_freem(m); 5190 if_statinc(ifp, if_oerrors); 5191 return; 5192 } 5193 5194 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 5195 IF_ENQUEUE(&sp->pp_cpq, m); 5196 5197 if (! (ifp->if_flags & IFF_OACTIVE)) { 5198 SPPP_UNLOCK(sp); 5199 if_start_lock(ifp); 5200 SPPP_LOCK(sp, RW_WRITER); 5201 } 5202 } 5203 5204 static int 5205 sppp_auth_role(const struct cp *cp, struct sppp *sp) 5206 { 5207 int role; 5208 5209 role = SPPP_AUTH_NOROLE; 5210 5211 if (sp->hisauth.proto == cp->proto && 5212 ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO)) 5213 SET(role, SPPP_AUTH_SERV); 5214 5215 if (sp->myauth.proto == cp->proto) 5216 SET(role, SPPP_AUTH_PEER); 5217 5218 return role; 5219 } 5220 5221 static void 5222 sppp_auth_to_event(struct sppp *sp, void *xcp) 5223 { 5224 const struct cp *cp = xcp; 5225 bool override; 5226 int state; 5227 STDDCL; 5228 5229 KASSERT(SPPP_WLOCKED(sp)); 5230 KASSERT(!cpu_softintr_p()); 5231 5232 override = false; 5233 state = sp->scp[cp->protoidx].state; 5234 5235 if (sp->scp[cp->protoidx].rst_counter > 0) { 5236 /* override TO+ event */ 5237 switch (state) { 5238 case STATE_OPENED: 5239 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 5240 override = true; 5241 sp->chap.rechallenging = true; 5242 sp->chap.response_rcvd = false; 5243 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 5244 cp->scr(sp); 5245 } 5246 break; 5247 5248 case STATE_ACK_RCVD: 5249 override = true; 5250 cp->scr(sp); 5251 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 5252 break; 5253 } 5254 } 5255 5256 if (override) { 5257 if (debug) 5258 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 5259 ifp->if_xname, cp->name, 5260 sppp_state_name(state), 5261 sp->scp[cp->protoidx].rst_counter); 5262 sp->scp[cp->protoidx].rst_counter--; 5263 } else { 5264 sppp_to_event(sp, xcp); 5265 } 5266 } 5267 5268 static void 5269 sppp_auth_sca_scn(const struct cp *cp, struct sppp *sp) 5270 { 5271 static const char *succmsg = "Welcome!"; 5272 static const char *failmsg = "Failed..."; 5273 const char *msg; 5274 u_char type, rconfid, mlen; 5275 5276 KASSERT(SPPP_WLOCKED(sp)); 5277 5278 if (!ISSET(sppp_auth_role(cp, sp), SPPP_AUTH_SERV)) 5279 return; 5280 5281 rconfid = sp->scp[cp->protoidx].rconfid; 5282 5283 if (sp->scp[cp->protoidx].rcr_type == CP_RCR_ACK) { 5284 type = cp->proto == PPP_CHAP ? CHAP_SUCCESS : PAP_ACK; 5285 msg = succmsg; 5286 mlen = sizeof(succmsg) - 1; 5287 5288 sp->pp_auth_failures = 0; 5289 } else { 5290 type = cp->proto == PPP_CHAP ? CHAP_FAILURE : PAP_NAK; 5291 msg = failmsg; 5292 mlen = sizeof(failmsg) - 1; 5293 5294 /* shutdown LCP if auth failed */ 5295 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5296 sp->pp_auth_failures++; 5297 } 5298 5299 sppp_auth_send(cp, sp, type, rconfid, 5300 mlen, (const u_char *)msg, 0); 5301 } 5302 5303 /* 5304 * Send keepalive packets, every 10 seconds. 5305 */ 5306 static void 5307 sppp_keepalive(void *dummy) 5308 { 5309 struct sppp *sp; 5310 int s; 5311 time_t now; 5312 5313 SPPPQ_LOCK(); 5314 5315 s = splnet(); 5316 now = time_uptime; 5317 for (sp=spppq; sp; sp=sp->pp_next) { 5318 struct ifnet *ifp = NULL; 5319 5320 SPPP_LOCK(sp, RW_WRITER); 5321 ifp = &sp->pp_if; 5322 5323 /* check idle timeout */ 5324 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 5325 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 5326 /* idle timeout is enabled for this interface */ 5327 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 5328 if (ifp->if_flags & IFF_DEBUG) 5329 printf("%s: no activity for %lu seconds\n", 5330 sp->pp_if.if_xname, 5331 (unsigned long)(now-sp->pp_last_activity)); 5332 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5333 SPPP_UNLOCK(sp); 5334 continue; 5335 } 5336 } 5337 5338 /* Keepalive mode disabled or channel down? */ 5339 if (! (sp->pp_flags & PP_KEEPALIVE) || 5340 ! (ifp->if_flags & IFF_RUNNING)) { 5341 SPPP_UNLOCK(sp); 5342 continue; 5343 } 5344 5345 /* No keepalive in PPP mode if LCP not opened yet. */ 5346 if (! (sp->pp_flags & PP_CISCO) && 5347 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 5348 SPPP_UNLOCK(sp); 5349 continue; 5350 } 5351 5352 /* No echo reply, but maybe user data passed through? */ 5353 if ((now - sp->pp_last_receive) < sp->pp_max_noreceive) { 5354 sp->pp_alivecnt = 0; 5355 SPPP_UNLOCK(sp); 5356 continue; 5357 } 5358 5359 if (sp->pp_alivecnt >= sp->pp_maxalive) { 5360 /* No keepalive packets got. Stop the interface. */ 5361 sppp_wq_add(sp->wq_cp, &sp->work_ifdown); 5362 5363 if (! (sp->pp_flags & PP_CISCO)) { 5364 printf("%s: LCP keepalive timed out, going to restart the connection\n", 5365 ifp->if_xname); 5366 sp->pp_alivecnt = 0; 5367 5368 /* we are down, close all open protocols */ 5369 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5370 5371 /* And now prepare LCP to reestablish the link, if configured to do so. */ 5372 sp->lcp.reestablish = true; 5373 5374 SPPP_UNLOCK(sp); 5375 continue; 5376 } 5377 } 5378 if (sp->pp_alivecnt < sp->pp_maxalive) 5379 ++sp->pp_alivecnt; 5380 if (sp->pp_flags & PP_CISCO) 5381 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, 5382 ++sp->scp[IDX_LCP].seq, sp->scp[IDX_LCP].rseq); 5383 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 5384 int32_t nmagic = htonl(sp->lcp.magic); 5385 sp->lcp.echoid = ++sp->scp[IDX_LCP].seq; 5386 sppp_cp_send(sp, PPP_LCP, ECHO_REQ, 5387 sp->lcp.echoid, 4, &nmagic); 5388 } 5389 5390 SPPP_UNLOCK(sp); 5391 } 5392 splx(s); 5393 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 5394 5395 SPPPQ_UNLOCK(); 5396 } 5397 5398 #ifdef INET 5399 /* 5400 * Get both IP addresses. 5401 */ 5402 static void 5403 sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, uint32_t *srcmask) 5404 { 5405 struct ifnet *ifp = &sp->pp_if; 5406 struct ifaddr *ifa; 5407 struct sockaddr_in *si, *sm; 5408 uint32_t ssrc, ddst; 5409 int s; 5410 struct psref psref; 5411 5412 sm = NULL; 5413 ssrc = ddst = 0; 5414 /* 5415 * Pick the first AF_INET address from the list, 5416 * aliases don't make any sense on a p2p link anyway. 5417 */ 5418 si = 0; 5419 s = pserialize_read_enter(); 5420 IFADDR_READER_FOREACH(ifa, ifp) { 5421 if (ifa->ifa_addr->sa_family == AF_INET) { 5422 si = (struct sockaddr_in *)ifa->ifa_addr; 5423 sm = (struct sockaddr_in *)ifa->ifa_netmask; 5424 if (si) { 5425 ifa_acquire(ifa, &psref); 5426 break; 5427 } 5428 } 5429 } 5430 pserialize_read_exit(s); 5431 if (ifa) { 5432 if (si && si->sin_addr.s_addr) { 5433 ssrc = si->sin_addr.s_addr; 5434 if (srcmask) 5435 *srcmask = ntohl(sm->sin_addr.s_addr); 5436 } 5437 5438 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 5439 if (si && si->sin_addr.s_addr) 5440 ddst = si->sin_addr.s_addr; 5441 ifa_release(ifa, &psref); 5442 } 5443 5444 if (dst) *dst = ntohl(ddst); 5445 if (src) *src = ntohl(ssrc); 5446 } 5447 5448 /* 5449 * Set IP addresses. Must be called at splnet. 5450 * If an address is 0, leave it the way it is. 5451 */ 5452 static void 5453 sppp_set_ip_addrs(struct sppp *sp) 5454 { 5455 STDDCL; 5456 struct ifaddr *ifa; 5457 struct sockaddr_in *si, *dest; 5458 uint32_t myaddr = 0, hisaddr = 0; 5459 int s; 5460 5461 IFNET_LOCK(ifp); 5462 5463 /* 5464 * Pick the first AF_INET address from the list, 5465 * aliases don't make any sense on a p2p link anyway. 5466 */ 5467 si = dest = NULL; 5468 s = pserialize_read_enter(); 5469 IFADDR_READER_FOREACH(ifa, ifp) { 5470 if (ifa->ifa_addr->sa_family == AF_INET) { 5471 si = (struct sockaddr_in *)ifa->ifa_addr; 5472 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5473 break; 5474 } 5475 } 5476 pserialize_read_exit(s); 5477 5478 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 5479 myaddr = sp->ipcp.req_myaddr; 5480 else if (si != NULL) 5481 myaddr = ntohl(si->sin_addr.s_addr); 5482 5483 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 5484 hisaddr = sp->ipcp.req_hisaddr; 5485 else if (dest != NULL) 5486 hisaddr = ntohl(dest->sin_addr.s_addr); 5487 5488 if (si != NULL && dest != NULL) { 5489 int error; 5490 struct sockaddr_in new_sin = *si; 5491 struct sockaddr_in new_dst = *dest; 5492 5493 if (myaddr != 0) 5494 new_sin.sin_addr.s_addr = htonl(myaddr); 5495 if (hisaddr != 0) { 5496 new_dst.sin_addr.s_addr = htonl(hisaddr); 5497 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) 5498 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 5499 } 5500 5501 in_addrhash_remove(ifatoia(ifa)); 5502 5503 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5504 5505 in_addrhash_insert(ifatoia(ifa)); 5506 5507 if (debug && error) 5508 { 5509 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5510 ifp->if_xname, __func__, error); 5511 } 5512 if (!error) { 5513 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5514 } 5515 } 5516 5517 if (ifp->if_mtu > sp->lcp.their_mru) { 5518 sp->pp_saved_mtu = ifp->if_mtu; 5519 ifp->if_mtu = sp->lcp.their_mru; 5520 if (debug) 5521 log(LOG_DEBUG, 5522 "%s: setting MTU to %" PRIu64 " bytes\n", 5523 ifp->if_xname, ifp->if_mtu); 5524 } 5525 5526 IFNET_UNLOCK(ifp); 5527 5528 sppp_notify_con(sp); 5529 } 5530 5531 /* 5532 * Clear IP addresses. Must be called at splnet. 5533 */ 5534 static void 5535 sppp_clear_ip_addrs(struct sppp *sp) 5536 { 5537 STDDCL; 5538 struct ifaddr *ifa; 5539 struct sockaddr_in *si, *dest; 5540 int s; 5541 5542 IFNET_LOCK(ifp); 5543 5544 /* 5545 * Pick the first AF_INET address from the list, 5546 * aliases don't make any sense on a p2p link anyway. 5547 */ 5548 si = dest = NULL; 5549 s = pserialize_read_enter(); 5550 IFADDR_READER_FOREACH(ifa, ifp) { 5551 if (ifa->ifa_addr->sa_family == AF_INET) { 5552 si = (struct sockaddr_in *)ifa->ifa_addr; 5553 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5554 break; 5555 } 5556 } 5557 pserialize_read_exit(s); 5558 5559 if (si != NULL) { 5560 struct sockaddr_in new_sin = *si; 5561 struct sockaddr_in new_dst = *dest; 5562 int error; 5563 5564 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 5565 new_sin.sin_addr.s_addr = 0; 5566 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 5567 new_dst.sin_addr.s_addr = sp->ipcp.saved_hisaddr; 5568 5569 in_addrhash_remove(ifatoia(ifa)); 5570 5571 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5572 5573 in_addrhash_insert(ifatoia(ifa)); 5574 5575 if (debug && error) 5576 { 5577 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5578 ifp->if_xname, __func__, error); 5579 } 5580 if (!error) { 5581 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5582 } 5583 } 5584 5585 if (sp->pp_saved_mtu > 0) { 5586 ifp->if_mtu = sp->pp_saved_mtu; 5587 sp->pp_saved_mtu = 0; 5588 if (debug) 5589 log(LOG_DEBUG, 5590 "%s: resetting MTU to %" PRIu64 " bytes\n", 5591 ifp->if_xname, ifp->if_mtu); 5592 } 5593 5594 IFNET_UNLOCK(ifp); 5595 } 5596 #endif 5597 5598 #ifdef INET6 5599 /* 5600 * Get both IPv6 addresses. 5601 */ 5602 static void 5603 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 5604 struct in6_addr *srcmask) 5605 { 5606 struct ifnet *ifp = &sp->pp_if; 5607 struct ifaddr *ifa; 5608 struct sockaddr_in6 *si, *sm; 5609 struct in6_addr ssrc, ddst; 5610 int s; 5611 struct psref psref; 5612 5613 sm = NULL; 5614 memset(&ssrc, 0, sizeof(ssrc)); 5615 memset(&ddst, 0, sizeof(ddst)); 5616 /* 5617 * Pick the first link-local AF_INET6 address from the list, 5618 * aliases don't make any sense on a p2p link anyway. 5619 */ 5620 si = 0; 5621 s = pserialize_read_enter(); 5622 IFADDR_READER_FOREACH(ifa, ifp) { 5623 if (ifa->ifa_addr->sa_family == AF_INET6) { 5624 si = (struct sockaddr_in6 *)ifa->ifa_addr; 5625 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 5626 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) { 5627 ifa_acquire(ifa, &psref); 5628 break; 5629 } 5630 } 5631 } 5632 pserialize_read_exit(s); 5633 5634 if (ifa) { 5635 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 5636 memcpy(&ssrc, &si->sin6_addr, sizeof(ssrc)); 5637 if (srcmask) { 5638 memcpy(srcmask, &sm->sin6_addr, 5639 sizeof(*srcmask)); 5640 } 5641 } 5642 5643 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 5644 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 5645 memcpy(&ddst, &si->sin6_addr, sizeof(ddst)); 5646 ifa_release(ifa, &psref); 5647 } 5648 5649 if (dst) 5650 memcpy(dst, &ddst, sizeof(*dst)); 5651 if (src) 5652 memcpy(src, &ssrc, sizeof(*src)); 5653 } 5654 5655 #ifdef IPV6CP_MYIFID_DYN 5656 /* 5657 * Generate random ifid. 5658 */ 5659 static void 5660 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 5661 { 5662 /* TBD */ 5663 } 5664 5665 /* 5666 * Set my IPv6 address. Must be called at splnet. 5667 */ 5668 static void 5669 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 5670 { 5671 STDDCL; 5672 struct ifaddr *ifa; 5673 struct sockaddr_in6 *sin6; 5674 int s; 5675 struct psref psref; 5676 5677 IFNET_LOCK(ifp); 5678 5679 /* 5680 * Pick the first link-local AF_INET6 address from the list, 5681 * aliases don't make any sense on a p2p link anyway. 5682 */ 5683 5684 sin6 = NULL; 5685 s = pserialize_read_enter(); 5686 IFADDR_READER_FOREACH(ifa, ifp) 5687 { 5688 if (ifa->ifa_addr->sa_family == AF_INET6) 5689 { 5690 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 5691 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 5692 ifa_acquire(ifa, &psref); 5693 break; 5694 } 5695 } 5696 } 5697 pserialize_read_exit(s); 5698 5699 if (ifa && sin6) 5700 { 5701 int error; 5702 struct sockaddr_in6 new_sin6 = *sin6; 5703 5704 memcpy(&new_sin6.sin6_addr, src, sizeof(new_sin6.sin6_addr)); 5705 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 5706 if (debug && error) 5707 { 5708 log(LOG_DEBUG, "%s: %s: in6_ifinit failed, error=%d\n", 5709 ifp->if_xname, __func__, error); 5710 } 5711 if (!error) { 5712 pfil_run_addrhooks(if_pfil, SIOCAIFADDR_IN6, ifa); 5713 } 5714 ifa_release(ifa, &psref); 5715 } 5716 5717 IFNET_UNLOCK(ifp); 5718 } 5719 #endif 5720 5721 /* 5722 * Suggest a candidate address to be used by peer. 5723 */ 5724 static void 5725 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 5726 { 5727 struct in6_addr myaddr; 5728 struct timeval tv; 5729 5730 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 5731 5732 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 5733 microtime(&tv); 5734 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 5735 myaddr.s6_addr[14] ^= 0xff; 5736 myaddr.s6_addr[15] ^= 0xff; 5737 } else { 5738 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 5739 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 5740 } 5741 if (suggest) 5742 memcpy(suggest, &myaddr, sizeof(myaddr)); 5743 } 5744 #endif /*INET6*/ 5745 5746 /* 5747 * Process ioctl requests specific to the PPP interface. 5748 * Permissions have already been checked. 5749 */ 5750 static int 5751 sppp_params(struct sppp *sp, u_long cmd, void *data) 5752 { 5753 switch (cmd) { 5754 case SPPPGETAUTHCFG: 5755 { 5756 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5757 int error; 5758 size_t len; 5759 5760 SPPP_LOCK(sp, RW_READER); 5761 5762 cfg->myauthflags = sp->myauth.flags; 5763 cfg->hisauthflags = sp->hisauth.flags; 5764 strlcpy(cfg->ifname, sp->pp_if.if_xname, sizeof(cfg->ifname)); 5765 cfg->hisauth = 0; 5766 if (sp->hisauth.proto) 5767 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5768 cfg->myauth = 0; 5769 if (sp->myauth.proto) 5770 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5771 if (cfg->myname_length == 0) { 5772 if (sp->myauth.name != NULL) 5773 cfg->myname_length = sp->myauth.name_len + 1; 5774 } else { 5775 if (sp->myauth.name == NULL) { 5776 cfg->myname_length = 0; 5777 } else { 5778 len = sp->myauth.name_len + 1; 5779 5780 if (cfg->myname_length < len) { 5781 SPPP_UNLOCK(sp); 5782 return (ENAMETOOLONG); 5783 } 5784 error = copyout(sp->myauth.name, cfg->myname, len); 5785 if (error) { 5786 SPPP_UNLOCK(sp); 5787 return error; 5788 } 5789 } 5790 } 5791 if (cfg->hisname_length == 0) { 5792 if (sp->hisauth.name != NULL) 5793 cfg->hisname_length = sp->hisauth.name_len + 1; 5794 } else { 5795 if (sp->hisauth.name == NULL) { 5796 cfg->hisname_length = 0; 5797 } else { 5798 len = sp->hisauth.name_len + 1; 5799 5800 if (cfg->hisname_length < len) { 5801 SPPP_UNLOCK(sp); 5802 return (ENAMETOOLONG); 5803 } 5804 error = copyout(sp->hisauth.name, cfg->hisname, len); 5805 if (error) { 5806 SPPP_UNLOCK(sp); 5807 return error; 5808 } 5809 } 5810 } 5811 SPPP_UNLOCK(sp); 5812 } 5813 break; 5814 case SPPPSETAUTHCFG: 5815 { 5816 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5817 int error; 5818 5819 SPPP_LOCK(sp, RW_WRITER); 5820 5821 if (sp->myauth.name) { 5822 free(sp->myauth.name, M_DEVBUF); 5823 sp->myauth.name = NULL; 5824 } 5825 if (sp->myauth.secret) { 5826 free(sp->myauth.secret, M_DEVBUF); 5827 sp->myauth.secret = NULL; 5828 } 5829 if (sp->hisauth.name) { 5830 free(sp->hisauth.name, M_DEVBUF); 5831 sp->hisauth.name = NULL; 5832 } 5833 if (sp->hisauth.secret) { 5834 free(sp->hisauth.secret, M_DEVBUF); 5835 sp->hisauth.secret = NULL; 5836 } 5837 5838 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5839 if (cfg->hisname_length >= MCLBYTES) { 5840 SPPP_UNLOCK(sp); 5841 return (ENAMETOOLONG); 5842 } 5843 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5844 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5845 if (error) { 5846 free(sp->hisauth.name, M_DEVBUF); 5847 sp->hisauth.name = NULL; 5848 SPPP_UNLOCK(sp); 5849 return error; 5850 } 5851 sp->hisauth.name_len = cfg->hisname_length - 1; 5852 sp->hisauth.name[sp->hisauth.name_len] = 0; 5853 } 5854 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5855 if (cfg->hissecret_length >= MCLBYTES) { 5856 SPPP_UNLOCK(sp); 5857 return (ENAMETOOLONG); 5858 } 5859 sp->hisauth.secret = malloc(cfg->hissecret_length, 5860 M_DEVBUF, M_WAITOK); 5861 error = copyin(cfg->hissecret, sp->hisauth.secret, 5862 cfg->hissecret_length); 5863 if (error) { 5864 free(sp->hisauth.secret, M_DEVBUF); 5865 sp->hisauth.secret = NULL; 5866 SPPP_UNLOCK(sp); 5867 return error; 5868 } 5869 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5870 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5871 } 5872 if (cfg->myname != NULL && cfg->myname_length > 0) { 5873 if (cfg->myname_length >= MCLBYTES) { 5874 SPPP_UNLOCK(sp); 5875 return (ENAMETOOLONG); 5876 } 5877 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5878 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5879 if (error) { 5880 free(sp->myauth.name, M_DEVBUF); 5881 sp->myauth.name = NULL; 5882 SPPP_UNLOCK(sp); 5883 return error; 5884 } 5885 sp->myauth.name_len = cfg->myname_length - 1; 5886 sp->myauth.name[sp->myauth.name_len] = 0; 5887 } 5888 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5889 if (cfg->mysecret_length >= MCLBYTES) { 5890 SPPP_UNLOCK(sp); 5891 return (ENAMETOOLONG); 5892 } 5893 sp->myauth.secret = malloc(cfg->mysecret_length, 5894 M_DEVBUF, M_WAITOK); 5895 error = copyin(cfg->mysecret, sp->myauth.secret, 5896 cfg->mysecret_length); 5897 if (error) { 5898 free(sp->myauth.secret, M_DEVBUF); 5899 sp->myauth.secret = NULL; 5900 SPPP_UNLOCK(sp); 5901 return error; 5902 } 5903 sp->myauth.secret_len = cfg->mysecret_length - 1; 5904 sp->myauth.secret[sp->myauth.secret_len] = 0; 5905 } 5906 sp->myauth.flags = cfg->myauthflags; 5907 if (cfg->myauth) 5908 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5909 sp->hisauth.flags = cfg->hisauthflags; 5910 if (cfg->hisauth) 5911 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5912 sp->pp_auth_failures = 0; 5913 if (sp->hisauth.proto != 0) 5914 SET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 5915 else 5916 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 5917 5918 SPPP_UNLOCK(sp); 5919 } 5920 break; 5921 case SPPPGETLCPCFG: 5922 { 5923 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5924 5925 SPPP_LOCK(sp, RW_READER); 5926 lcpp->lcp_timeout = sp->lcp.timeout; 5927 SPPP_UNLOCK(sp); 5928 } 5929 break; 5930 case SPPPSETLCPCFG: 5931 { 5932 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5933 5934 SPPP_LOCK(sp, RW_WRITER); 5935 sp->lcp.timeout = lcpp->lcp_timeout; 5936 SPPP_UNLOCK(sp); 5937 } 5938 break; 5939 case SPPPGETSTATUS: 5940 { 5941 struct spppstatus *status = (struct spppstatus *)data; 5942 5943 SPPP_LOCK(sp, RW_READER); 5944 status->phase = sp->pp_phase; 5945 SPPP_UNLOCK(sp); 5946 } 5947 break; 5948 case SPPPGETSTATUSNCP: 5949 { 5950 struct spppstatusncp *status = (struct spppstatusncp *)data; 5951 5952 SPPP_LOCK(sp, RW_READER); 5953 status->phase = sp->pp_phase; 5954 status->ncpup = sppp_cp_check(sp, CP_NCP); 5955 SPPP_UNLOCK(sp); 5956 } 5957 break; 5958 case SPPPGETIDLETO: 5959 { 5960 struct spppidletimeout *to = (struct spppidletimeout *)data; 5961 5962 SPPP_LOCK(sp, RW_READER); 5963 to->idle_seconds = sp->pp_idle_timeout; 5964 SPPP_UNLOCK(sp); 5965 } 5966 break; 5967 case SPPPSETIDLETO: 5968 { 5969 struct spppidletimeout *to = (struct spppidletimeout *)data; 5970 5971 SPPP_LOCK(sp, RW_WRITER); 5972 sp->pp_idle_timeout = to->idle_seconds; 5973 SPPP_UNLOCK(sp); 5974 } 5975 break; 5976 case SPPPSETAUTHFAILURE: 5977 { 5978 struct spppauthfailuresettings *afsettings = 5979 (struct spppauthfailuresettings *)data; 5980 5981 SPPP_LOCK(sp, RW_WRITER); 5982 sp->pp_max_auth_fail = afsettings->max_failures; 5983 sp->pp_auth_failures = 0; 5984 SPPP_UNLOCK(sp); 5985 } 5986 break; 5987 case SPPPGETAUTHFAILURES: 5988 { 5989 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5990 5991 SPPP_LOCK(sp, RW_READER); 5992 stats->auth_failures = sp->pp_auth_failures; 5993 stats->max_failures = sp->pp_max_auth_fail; 5994 SPPP_UNLOCK(sp); 5995 } 5996 break; 5997 case SPPPSETDNSOPTS: 5998 { 5999 struct spppdnssettings *req = (struct spppdnssettings *)data; 6000 6001 SPPP_LOCK(sp, RW_WRITER); 6002 sp->query_dns = req->query_dns & 3; 6003 SPPP_UNLOCK(sp); 6004 } 6005 break; 6006 case SPPPGETDNSOPTS: 6007 { 6008 struct spppdnssettings *req = (struct spppdnssettings *)data; 6009 6010 SPPP_LOCK(sp, RW_READER); 6011 req->query_dns = sp->query_dns; 6012 SPPP_UNLOCK(sp); 6013 } 6014 break; 6015 case SPPPGETDNSADDRS: 6016 { 6017 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; 6018 6019 SPPP_LOCK(sp, RW_READER); 6020 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 6021 SPPP_UNLOCK(sp); 6022 } 6023 break; 6024 case SPPPGETKEEPALIVE: 6025 { 6026 struct spppkeepalivesettings *settings = 6027 (struct spppkeepalivesettings*)data; 6028 6029 SPPP_LOCK(sp, RW_READER); 6030 settings->maxalive = sp->pp_maxalive; 6031 settings->max_noreceive = sp->pp_max_noreceive; 6032 SPPP_UNLOCK(sp); 6033 } 6034 break; 6035 case SPPPSETKEEPALIVE: 6036 { 6037 struct spppkeepalivesettings *settings = 6038 (struct spppkeepalivesettings*)data; 6039 6040 SPPP_LOCK(sp, RW_WRITER); 6041 sp->pp_maxalive = settings->maxalive; 6042 sp->pp_max_noreceive = settings->max_noreceive; 6043 SPPP_UNLOCK(sp); 6044 } 6045 break; 6046 case SPPPGETLCPSTATUS: 6047 { 6048 struct sppplcpstatus *status = 6049 (struct sppplcpstatus *)data; 6050 6051 SPPP_LOCK(sp, RW_READER); 6052 status->state = sp->scp[IDX_LCP].state; 6053 status->opts = sp->lcp.opts; 6054 status->magic = sp->lcp.magic; 6055 status->mru = sp->lcp.mru; 6056 SPPP_UNLOCK(sp); 6057 } 6058 break; 6059 case SPPPGETIPCPSTATUS: 6060 { 6061 struct spppipcpstatus *status = 6062 (struct spppipcpstatus *)data; 6063 u_int32_t myaddr; 6064 6065 SPPP_LOCK(sp, RW_READER); 6066 status->state = sp->scp[IDX_IPCP].state; 6067 status->opts = sp->ipcp.opts; 6068 #ifdef INET 6069 kpreempt_disable(); 6070 sppp_get_ip_addrs(sp, &myaddr, 0, 0); 6071 kpreempt_enable(); 6072 #else 6073 myaddr = 0; 6074 #endif 6075 status->myaddr = ntohl(myaddr); 6076 SPPP_UNLOCK(sp); 6077 } 6078 break; 6079 case SPPPGETIPV6CPSTATUS: 6080 { 6081 struct spppipv6cpstatus *status = 6082 (struct spppipv6cpstatus *)data; 6083 6084 SPPP_LOCK(sp, RW_READER); 6085 status->state = sp->scp[IDX_IPV6CP].state; 6086 memcpy(status->my_ifid, sp->ipv6cp.my_ifid, 6087 sizeof(status->my_ifid)); 6088 memcpy(status->his_ifid, sp->ipv6cp.his_ifid, 6089 sizeof(status->his_ifid)); 6090 SPPP_UNLOCK(sp); 6091 } 6092 break; 6093 default: 6094 { 6095 int ret; 6096 6097 MODULE_HOOK_CALL(sppp_params_50_hook, (sp, cmd, data), 6098 enosys(), ret); 6099 if (ret != ENOSYS) 6100 return ret; 6101 return (EINVAL); 6102 } 6103 } 6104 return (0); 6105 } 6106 6107 static void 6108 sppp_phase_network(struct sppp *sp) 6109 { 6110 int i; 6111 6112 KASSERT(SPPP_WLOCKED(sp)); 6113 6114 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 6115 6116 /* Notify NCPs now. */ 6117 for (i = 0; i < IDX_COUNT; i++) 6118 if ((cps[i])->flags & CP_NCP) 6119 sppp_wq_add(sp->wq_cp, &sp->scp[i].work_open); 6120 } 6121 6122 static const char * 6123 sppp_cp_type_name(u_char type) 6124 { 6125 static char buf[12]; 6126 switch (type) { 6127 case CONF_REQ: return "conf-req"; 6128 case CONF_ACK: return "conf-ack"; 6129 case CONF_NAK: return "conf-nak"; 6130 case CONF_REJ: return "conf-rej"; 6131 case TERM_REQ: return "term-req"; 6132 case TERM_ACK: return "term-ack"; 6133 case CODE_REJ: return "code-rej"; 6134 case PROTO_REJ: return "proto-rej"; 6135 case ECHO_REQ: return "echo-req"; 6136 case ECHO_REPLY: return "echo-reply"; 6137 case DISC_REQ: return "discard-req"; 6138 } 6139 snprintf(buf, sizeof(buf), "0x%x", type); 6140 return buf; 6141 } 6142 6143 static const char * 6144 sppp_auth_type_name(u_short proto, u_char type) 6145 { 6146 static char buf[32]; 6147 const char *name; 6148 6149 switch (proto) { 6150 case PPP_CHAP: 6151 switch (type) { 6152 case CHAP_CHALLENGE: return "challenge"; 6153 case CHAP_RESPONSE: return "response"; 6154 case CHAP_SUCCESS: return "success"; 6155 case CHAP_FAILURE: return "failure"; 6156 default: name = "chap"; break; 6157 } 6158 break; 6159 6160 case PPP_PAP: 6161 switch (type) { 6162 case PAP_REQ: return "req"; 6163 case PAP_ACK: return "ack"; 6164 case PAP_NAK: return "nak"; 6165 default: name = "pap"; break; 6166 } 6167 break; 6168 6169 default: 6170 name = "bad"; 6171 break; 6172 } 6173 6174 snprintf(buf, sizeof(buf), "%s(%#x) %#x", name, proto, type); 6175 return buf; 6176 } 6177 6178 static const char * 6179 sppp_lcp_opt_name(u_char opt) 6180 { 6181 static char buf[12]; 6182 switch (opt) { 6183 case LCP_OPT_MRU: return "mru"; 6184 case LCP_OPT_ASYNC_MAP: return "async-map"; 6185 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 6186 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 6187 case LCP_OPT_MAGIC: return "magic"; 6188 case LCP_OPT_PROTO_COMP: return "proto-comp"; 6189 case LCP_OPT_ADDR_COMP: return "addr-comp"; 6190 case LCP_OPT_SELF_DESC_PAD: return "sdpad"; 6191 case LCP_OPT_CALL_BACK: return "callback"; 6192 case LCP_OPT_COMPOUND_FRMS: return "cmpd-frms"; 6193 case LCP_OPT_MP_MRRU: return "mrru"; 6194 case LCP_OPT_MP_SSNHF: return "mp-ssnhf"; 6195 case LCP_OPT_MP_EID: return "mp-eid"; 6196 } 6197 snprintf(buf, sizeof(buf), "0x%x", opt); 6198 return buf; 6199 } 6200 6201 static const char * 6202 sppp_ipcp_opt_name(u_char opt) 6203 { 6204 static char buf[12]; 6205 switch (opt) { 6206 case IPCP_OPT_ADDRESSES: return "addresses"; 6207 case IPCP_OPT_COMPRESSION: return "compression"; 6208 case IPCP_OPT_ADDRESS: return "address"; 6209 } 6210 snprintf(buf, sizeof(buf), "0x%x", opt); 6211 return buf; 6212 } 6213 6214 #ifdef INET6 6215 static const char * 6216 sppp_ipv6cp_opt_name(u_char opt) 6217 { 6218 static char buf[12]; 6219 switch (opt) { 6220 case IPV6CP_OPT_IFID: return "ifid"; 6221 case IPV6CP_OPT_COMPRESSION: return "compression"; 6222 } 6223 snprintf(buf, sizeof(buf), "0x%x", opt); 6224 return buf; 6225 } 6226 #endif 6227 6228 static const char * 6229 sppp_state_name(int state) 6230 { 6231 switch (state) { 6232 case STATE_INITIAL: return "initial"; 6233 case STATE_STARTING: return "starting"; 6234 case STATE_CLOSED: return "closed"; 6235 case STATE_STOPPED: return "stopped"; 6236 case STATE_CLOSING: return "closing"; 6237 case STATE_STOPPING: return "stopping"; 6238 case STATE_REQ_SENT: return "req-sent"; 6239 case STATE_ACK_RCVD: return "ack-rcvd"; 6240 case STATE_ACK_SENT: return "ack-sent"; 6241 case STATE_OPENED: return "opened"; 6242 } 6243 return "illegal"; 6244 } 6245 6246 static const char * 6247 sppp_phase_name(int phase) 6248 { 6249 switch (phase) { 6250 case SPPP_PHASE_DEAD: return "dead"; 6251 case SPPP_PHASE_ESTABLISH: return "establish"; 6252 case SPPP_PHASE_TERMINATE: return "terminate"; 6253 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 6254 case SPPP_PHASE_NETWORK: return "network"; 6255 } 6256 return "illegal"; 6257 } 6258 6259 static const char * 6260 sppp_proto_name(u_short proto) 6261 { 6262 static char buf[12]; 6263 switch (proto) { 6264 case PPP_LCP: return "lcp"; 6265 case PPP_IPCP: return "ipcp"; 6266 case PPP_PAP: return "pap"; 6267 case PPP_CHAP: return "chap"; 6268 case PPP_IPV6CP: return "ipv6cp"; 6269 } 6270 snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto); 6271 return buf; 6272 } 6273 6274 static void 6275 sppp_print_bytes(const u_char *p, u_short len) 6276 { 6277 addlog(" %02x", *p++); 6278 while (--len > 0) 6279 addlog("-%02x", *p++); 6280 } 6281 6282 static void 6283 sppp_print_string(const char *p, u_short len) 6284 { 6285 u_char c; 6286 6287 while (len-- > 0) { 6288 c = *p++; 6289 /* 6290 * Print only ASCII chars directly. RFC 1994 recommends 6291 * using only them, but we don't rely on it. */ 6292 if (c < ' ' || c > '~') 6293 addlog("\\x%x", c); 6294 else 6295 addlog("%c", c); 6296 } 6297 } 6298 6299 static const char * 6300 sppp_dotted_quad(uint32_t addr) 6301 { 6302 static char s[16]; 6303 snprintf(s, sizeof(s), "%d.%d.%d.%d", 6304 (int)((addr >> 24) & 0xff), 6305 (int)((addr >> 16) & 0xff), 6306 (int)((addr >> 8) & 0xff), 6307 (int)(addr & 0xff)); 6308 return s; 6309 } 6310 6311 /* a dummy, used to drop uninteresting events */ 6312 static void 6313 sppp_null(struct sppp *unused) 6314 { 6315 /* do just nothing */ 6316 } 6317 6318 static void 6319 sppp_tls(const struct cp *cp, struct sppp *sp) 6320 { 6321 6322 /* notify lcp that is lower layer */ 6323 sp->lcp.protos |= (1 << cp->protoidx); 6324 6325 if (sp->scp[IDX_LCP].state == STATE_OPENED) 6326 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_up); 6327 } 6328 6329 static void 6330 sppp_tlf(const struct cp *cp, struct sppp *sp) 6331 { 6332 STDDCL; 6333 6334 if (debug) 6335 log(LOG_DEBUG, "%s: %s tlf\n", ifp->if_xname, cp->name); 6336 6337 /* notify lcp that is lower layer */ 6338 sp->lcp.protos &= ~(1 << cp->protoidx); 6339 6340 /* cleanup */ 6341 if (sp->scp[cp->protoidx].rcr_buf != NULL) { 6342 kmem_free(sp->scp[cp->protoidx].rcr_buf, 6343 sp->scp[cp->protoidx].rcr_blen); 6344 } 6345 6346 sp->scp[cp->protoidx].rcr_buf = NULL; 6347 sp->scp[cp->protoidx].rcr_blen = 0; 6348 sp->scp[cp->protoidx].rcr_rlen = 0; 6349 6350 sppp_lcp_check_and_close(sp); 6351 } 6352 6353 static void 6354 sppp_sca_scn(const struct cp *cp, struct sppp *sp) 6355 { 6356 STDDCL; 6357 u_char rconfid, rlen; 6358 int type; 6359 void *buf; 6360 size_t blen; 6361 6362 rconfid = sp->scp[cp->protoidx].rconfid; 6363 buf = sp->scp[cp->protoidx].rcr_buf; 6364 rlen = sp->scp[cp->protoidx].rcr_rlen; 6365 blen = sp->scp[cp->protoidx].rcr_blen; 6366 6367 sp->scp[cp->protoidx].rcr_buf = NULL; 6368 sp->scp[cp->protoidx].rcr_blen = 0; 6369 6370 switch (sp->scp[cp->protoidx].rcr_type) { 6371 case CP_RCR_ACK: 6372 type = CONF_ACK; 6373 break; 6374 case CP_RCR_REJ: 6375 type = CONF_REJ; 6376 break; 6377 case CP_RCR_NAK: 6378 type = CONF_NAK; 6379 break; 6380 default: 6381 type = -1; 6382 break; 6383 } 6384 6385 sp->scp[cp->protoidx].rcr_type = CP_RCR_NONE; 6386 6387 if (buf != NULL) { 6388 if (rlen > 0 && type != -1) { 6389 if (debug) { 6390 log(LOG_DEBUG, "%s: send %s\n", 6391 ifp->if_xname, sppp_cp_type_name(type)); 6392 } 6393 sppp_cp_send(sp, cp->proto, type, rconfid, rlen, buf); 6394 } 6395 kmem_free(buf, blen); 6396 } 6397 } 6398 6399 static void 6400 sppp_ifdown(struct sppp *sp, void *xcp __unused) 6401 { 6402 6403 SPPP_UNLOCK(sp); 6404 if_down(&sp->pp_if); 6405 IF_PURGE(&sp->pp_cpq); 6406 SPPP_LOCK(sp, RW_WRITER); 6407 } 6408 6409 static void 6410 sppp_notify_up(struct sppp *sp) 6411 { 6412 6413 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_up); 6414 } 6415 6416 static void 6417 sppp_notify_down(struct sppp *sp) 6418 { 6419 6420 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_down); 6421 } 6422 6423 static void 6424 sppp_notify_tls_wlocked(struct sppp *sp) 6425 { 6426 6427 KASSERT(SPPP_WLOCKED(sp)); 6428 6429 if (!sp->pp_tls) 6430 return; 6431 6432 SPPP_UNLOCK(sp); 6433 sp->pp_tls(sp); 6434 SPPP_LOCK(sp, RW_WRITER); 6435 } 6436 6437 static void 6438 sppp_notify_tlf_wlocked(struct sppp *sp) 6439 { 6440 6441 KASSERT(SPPP_WLOCKED(sp)); 6442 6443 if (!sp->pp_tlf) 6444 return; 6445 6446 SPPP_UNLOCK(sp); 6447 sp->pp_tlf(sp); 6448 SPPP_LOCK(sp, RW_WRITER); 6449 } 6450 6451 static void 6452 sppp_notify_con(struct sppp *sp) 6453 { 6454 6455 if (!sp->pp_con) 6456 return; 6457 6458 sp->pp_con(sp); 6459 } 6460 6461 #ifdef INET6 6462 static void 6463 sppp_notify_con_wlocked(struct sppp *sp) 6464 { 6465 6466 KASSERT(SPPP_WLOCKED(sp)); 6467 6468 SPPP_UNLOCK(sp); 6469 sppp_notify_con(sp); 6470 SPPP_LOCK(sp, RW_WRITER); 6471 6472 } 6473 #endif 6474 6475 static void 6476 sppp_notify_chg_wlocked(struct sppp *sp) 6477 { 6478 6479 KASSERT(SPPP_WLOCKED(sp)); 6480 6481 if (!sp->pp_chg) 6482 return; 6483 6484 SPPP_UNLOCK(sp); 6485 sp->pp_chg(sp, sp->pp_phase); 6486 SPPP_LOCK(sp, RW_WRITER); 6487 } 6488 6489 static void 6490 sppp_wq_work(struct work *wk, void *xsp) 6491 { 6492 struct sppp *sp; 6493 struct sppp_work *work; 6494 6495 sp = xsp; 6496 work = container_of(wk, struct sppp_work, work); 6497 atomic_cas_uint(&work->state, SPPP_WK_BUSY, SPPP_WK_FREE); 6498 6499 SPPP_LOCK(sp, RW_WRITER); 6500 work->func(sp, work->arg); 6501 SPPP_UNLOCK(sp); 6502 } 6503 6504 static struct workqueue * 6505 sppp_wq_create(struct sppp *sp, const char *xnamebuf, pri_t prio, int ipl, int flags) 6506 { 6507 struct workqueue *wq; 6508 int error; 6509 6510 error = workqueue_create(&wq, xnamebuf, sppp_wq_work, 6511 (void *)sp, prio, ipl, flags); 6512 if (error) { 6513 panic("%s: workqueue_create failed [%s, %d]\n", 6514 sp->pp_if.if_xname, xnamebuf, error); 6515 } 6516 6517 return wq; 6518 } 6519 6520 static void 6521 sppp_wq_destroy(struct sppp *sp __unused, struct workqueue *wq) 6522 { 6523 6524 workqueue_destroy(wq); 6525 } 6526 6527 static void 6528 sppp_wq_set(struct sppp_work *work, 6529 void (*func)(struct sppp *, void *), void *arg) 6530 { 6531 6532 work->func = func; 6533 work->arg = arg; 6534 } 6535 6536 static void 6537 sppp_wq_add(struct workqueue *wq, struct sppp_work *work) 6538 { 6539 6540 if (atomic_cas_uint(&work->state, SPPP_WK_FREE, SPPP_WK_BUSY) 6541 != SPPP_WK_FREE) 6542 return; 6543 6544 KASSERT(work->func != NULL); 6545 kpreempt_disable(); 6546 workqueue_enqueue(wq, &work->work, NULL); 6547 kpreempt_enable(); 6548 } 6549 static void 6550 sppp_wq_wait(struct workqueue *wq, struct sppp_work *work) 6551 { 6552 6553 atomic_swap_uint(&work->state, SPPP_WK_UNAVAIL); 6554 workqueue_wait(wq, &work->work); 6555 } 6556 6557 /* 6558 * This file is large. Tell emacs to highlight it nevertheless. 6559 * 6560 * Local Variables: 6561 * hilit-auto-highlight-maxout: 120000 6562 * End: 6563 */ 6564 6565 /* 6566 * Module glue 6567 */ 6568 MODULE(MODULE_CLASS_MISC, sppp_subr, NULL); 6569 6570 static int 6571 sppp_subr_modcmd(modcmd_t cmd, void *arg) 6572 { 6573 6574 switch (cmd) { 6575 case MODULE_CMD_INIT: 6576 case MODULE_CMD_FINI: 6577 return 0; 6578 case MODULE_CMD_STAT: 6579 case MODULE_CMD_AUTOUNLOAD: 6580 default: 6581 return ENOTTY; 6582 } 6583 } 6584
Indexes created Tue Oct 14 11:09:46 GMT 2025