if_spppsubr.c revision 1.203
1 /* $NetBSD: if_spppsubr.c,v 1.203 2020/11/25 09:57:26 yamaguchi Exp $ */ 2 3 /* 4 * Synchronous PPP/Cisco link level subroutines. 5 * Keepalive protocol implemented in both Cisco and PPP modes. 6 * 7 * Copyright (C) 1994-1996 Cronyx Engineering Ltd. 8 * Author: Serge Vakulenko, <vak (at) cronyx.ru> 9 * 10 * Heavily revamped to conform to RFC 1661. 11 * Copyright (C) 1997, Joerg Wunsch. 12 * 13 * RFC2472 IPv6CP support. 14 * Copyright (C) 2000, Jun-ichiro itojun Hagino <itojun (at) iijlab.net>. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions are met: 18 * 1. Redistributions of source code must retain the above copyright notice, 19 * this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright notice, 21 * this list of conditions and the following disclaimer in the documentation 22 * and/or other materials provided with the distribution. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE FREEBSD PROJECT ``AS IS'' AND ANY 25 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE FREEBSD PROJECT OR CONTRIBUTORS BE 28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 34 * POSSIBILITY OF SUCH DAMAGE. 35 * 36 * From: Version 2.4, Thu Apr 30 17:17:21 MSD 1997 37 * 38 * From: if_spppsubr.c,v 1.39 1998/04/04 13:26:03 phk Exp 39 * 40 * From: Id: if_spppsubr.c,v 1.23 1999/02/23 14:47:50 hm Exp 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: if_spppsubr.c,v 1.203 2020/11/25 09:57:26 yamaguchi Exp $"); 45 46 #if defined(_KERNEL_OPT) 47 #include "opt_inet.h" 48 #include "opt_modular.h" 49 #include "opt_compat_netbsd.h" 50 #include "opt_net_mpsafe.h" 51 #endif 52 53 54 #include <sys/param.h> 55 #include <sys/proc.h> 56 #include <sys/systm.h> 57 #include <sys/kernel.h> 58 #include <sys/sockio.h> 59 #include <sys/socket.h> 60 #include <sys/syslog.h> 61 #include <sys/malloc.h> 62 #include <sys/mbuf.h> 63 #include <sys/callout.h> 64 #include <sys/md5.h> 65 #include <sys/inttypes.h> 66 #include <sys/kauth.h> 67 #include <sys/cprng.h> 68 #include <sys/module.h> 69 #include <sys/workqueue.h> 70 #include <sys/atomic.h> 71 #include <sys/compat_stub.h> 72 73 #include <net/if.h> 74 #include <net/netisr.h> 75 #include <net/if_types.h> 76 #include <net/route.h> 77 #include <net/ppp_defs.h> 78 79 #include <netinet/in.h> 80 #include <netinet/in_systm.h> 81 #include <netinet/in_var.h> 82 #ifdef INET 83 #include <netinet/ip.h> 84 #include <netinet/tcp.h> 85 #endif 86 #include <net/ethertypes.h> 87 88 #ifdef INET6 89 #include <netinet6/scope6_var.h> 90 #endif 91 92 #include <net/if_sppp.h> 93 #include <net/if_spppvar.h> 94 95 #ifdef NET_MPSAFE 96 #define SPPPSUBR_MPSAFE 1 97 #endif 98 99 #define LCP_KEEPALIVE_INTERVAL 10 /* seconds between checks */ 100 #define LOOPALIVECNT 3 /* loopback detection tries */ 101 #define DEFAULT_MAXALIVECNT 3 /* max. missed alive packets */ 102 #define DEFAULT_NORECV_TIME 15 /* before we get worried */ 103 #define DEFAULT_MAX_AUTH_FAILURES 5 /* max. auth. failures */ 104 105 /* 106 * Interface flags that can be set in an ifconfig command. 107 * 108 * Setting link0 will make the link passive, i.e. it will be marked 109 * as being administrative openable, but won't be opened to begin 110 * with. Incoming calls will be answered, or subsequent calls with 111 * -link1 will cause the administrative open of the LCP layer. 112 * 113 * Setting link1 will cause the link to auto-dial only as packets 114 * arrive to be sent. 115 * 116 * Setting IFF_DEBUG will syslog the option negotiation and state 117 * transitions at level kern.debug. Note: all logs consistently look 118 * like 119 * 120 * <if-name><unit>: <proto-name> <additional info...> 121 * 122 * with <if-name><unit> being something like "bppp0", and <proto-name> 123 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. 124 */ 125 126 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 127 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 128 129 #define CONF_REQ 1 /* PPP configure request */ 130 #define CONF_ACK 2 /* PPP configure acknowledge */ 131 #define CONF_NAK 3 /* PPP configure negative ack */ 132 #define CONF_REJ 4 /* PPP configure reject */ 133 #define TERM_REQ 5 /* PPP terminate request */ 134 #define TERM_ACK 6 /* PPP terminate acknowledge */ 135 #define CODE_REJ 7 /* PPP code reject */ 136 #define PROTO_REJ 8 /* PPP protocol reject */ 137 #define ECHO_REQ 9 /* PPP echo request */ 138 #define ECHO_REPLY 10 /* PPP echo reply */ 139 #define DISC_REQ 11 /* PPP discard request */ 140 141 #define LCP_OPT_MRU 1 /* maximum receive unit */ 142 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 143 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 144 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 145 #define LCP_OPT_MAGIC 5 /* magic number */ 146 #define LCP_OPT_RESERVED 6 /* reserved */ 147 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 148 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 149 #define LCP_OPT_FCS_ALTS 9 /* FCS alternatives */ 150 #define LCP_OPT_SELF_DESC_PAD 10 /* self-describing padding */ 151 #define LCP_OPT_CALL_BACK 13 /* callback */ 152 #define LCP_OPT_COMPOUND_FRMS 15 /* compound frames */ 153 #define LCP_OPT_MP_MRRU 17 /* multilink MRRU */ 154 #define LCP_OPT_MP_SSNHF 18 /* multilink short seq. numbers */ 155 #define LCP_OPT_MP_EID 19 /* multilink endpoint discriminator */ 156 157 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 158 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol */ 159 #define IPCP_OPT_ADDRESS 3 /* local IP address */ 160 #define IPCP_OPT_PRIMDNS 129 /* primary remote dns address */ 161 #define IPCP_OPT_SECDNS 131 /* secondary remote dns address */ 162 163 #define IPCP_UPDATE_LIMIT 8 /* limit of pending IP updating job */ 164 #define IPCP_SET_ADDRS 1 /* marker for IP address setting job */ 165 #define IPCP_CLEAR_ADDRS 2 /* marker for IP address clearing job */ 166 167 #define IPV6CP_OPT_IFID 1 /* interface identifier */ 168 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 169 170 #define PAP_REQ 1 /* PAP name/password request */ 171 #define PAP_ACK 2 /* PAP acknowledge */ 172 #define PAP_NAK 3 /* PAP fail */ 173 174 #define CHAP_CHALLENGE 1 /* CHAP challenge request */ 175 #define CHAP_RESPONSE 2 /* CHAP challenge response */ 176 #define CHAP_SUCCESS 3 /* CHAP response ok */ 177 #define CHAP_FAILURE 4 /* CHAP response failed */ 178 179 #define CHAP_MD5 5 /* hash algorithm - MD5 */ 180 181 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 182 #define CISCO_UNICAST 0x0f /* Cisco unicast address */ 183 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 184 #define CISCO_ADDR_REQ 0 /* Cisco address request */ 185 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 186 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 187 188 /* states are named and numbered according to RFC 1661 */ 189 #define STATE_INITIAL 0 190 #define STATE_STARTING 1 191 #define STATE_CLOSED 2 192 #define STATE_STOPPED 3 193 #define STATE_CLOSING 4 194 #define STATE_STOPPING 5 195 #define STATE_REQ_SENT 6 196 #define STATE_ACK_RCVD 7 197 #define STATE_ACK_SENT 8 198 #define STATE_OPENED 9 199 200 struct ppp_header { 201 uint8_t address; 202 uint8_t control; 203 uint16_t protocol; 204 } __packed; 205 #define PPP_HEADER_LEN sizeof (struct ppp_header) 206 207 struct lcp_header { 208 uint8_t type; 209 uint8_t ident; 210 uint16_t len; 211 } __packed; 212 #define LCP_HEADER_LEN sizeof (struct lcp_header) 213 214 struct cisco_packet { 215 uint32_t type; 216 uint32_t par1; 217 uint32_t par2; 218 uint16_t rel; 219 uint16_t time0; 220 uint16_t time1; 221 } __packed; 222 #define CISCO_PACKET_LEN 18 223 224 /* 225 * We follow the spelling and capitalization of RFC 1661 here, to make 226 * it easier comparing with the standard. Please refer to this RFC in 227 * case you can't make sense out of these abbreviation; it will also 228 * explain the semantics related to the various events and actions. 229 */ 230 struct cp { 231 u_short proto; /* PPP control protocol number */ 232 u_char protoidx; /* index into state table in struct sppp */ 233 u_char flags; 234 #define CP_LCP 0x01 /* this is the LCP */ 235 #define CP_AUTH 0x02 /* this is an authentication protocol */ 236 #define CP_NCP 0x04 /* this is a NCP */ 237 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 238 const char *name; /* name of this control protocol */ 239 /* event handlers */ 240 void (*Up)(struct sppp *, void *); 241 void (*Down)(struct sppp *, void *); 242 void (*Open)(struct sppp *, void *); 243 void (*Close)(struct sppp *, void *); 244 void (*TO)(struct sppp *, void *); 245 int (*RCR)(struct sppp *, struct lcp_header *, int); 246 void (*RCN_rej)(struct sppp *, struct lcp_header *, int); 247 void (*RCN_nak)(struct sppp *, struct lcp_header *, int); 248 /* actions */ 249 void (*tlu)(struct sppp *); 250 void (*tld)(struct sppp *); 251 void (*tls)(const struct cp *, struct sppp *); 252 void (*tlf)(const struct cp *, struct sppp *); 253 void (*scr)(struct sppp *); 254 void (*scan)(const struct cp *, struct sppp *); 255 }; 256 257 enum auth_role { 258 SPPP_AUTH_NOROLE = 0, 259 SPPP_AUTH_SERV = __BIT(0), 260 SPPP_AUTH_PEER = __BIT(1), 261 }; 262 263 static struct sppp *spppq; 264 static kmutex_t *spppq_lock = NULL; 265 static callout_t keepalive_ch; 266 267 #define SPPPQ_LOCK() if (spppq_lock) \ 268 mutex_enter(spppq_lock); 269 #define SPPPQ_UNLOCK() if (spppq_lock) \ 270 mutex_exit(spppq_lock); 271 272 #define SPPP_LOCK(_sp, _op) rw_enter(&(_sp)->pp_lock, (_op)) 273 #define SPPP_UNLOCK(_sp) rw_exit(&(_sp)->pp_lock) 274 #define SPPP_WLOCKED(_sp) rw_write_held(&(_sp)->pp_lock) 275 #define SPPP_UPGRADE(_sp) do{ \ 276 SPPP_UNLOCK(_sp); \ 277 SPPP_LOCK(_sp, RW_WRITER); \ 278 }while (0) 279 #define SPPP_DOWNGRADE(_sp) rw_downgrade(&(_sp)->pp_lock) 280 #define SPPP_WQ_SET(_wk, _func, _arg) \ 281 sppp_wq_set((_wk), (_func), __UNCONST((_arg))) 282 283 #ifdef INET 284 #ifndef SPPPSUBR_MPSAFE 285 /* 286 * The following disgusting hack gets around the problem that IP TOS 287 * can't be set yet. We want to put "interactive" traffic on a high 288 * priority queue. To decide if traffic is interactive, we check that 289 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 290 * 291 * XXX is this really still necessary? - joerg - 292 */ 293 static u_short interactive_ports[8] = { 294 0, 513, 0, 0, 295 0, 21, 0, 23, 296 }; 297 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 298 #endif /* SPPPSUBR_MPSAFE */ 299 #endif 300 301 /* almost every function needs these */ 302 #define STDDCL \ 303 struct ifnet *ifp = &sp->pp_if; \ 304 int debug = ifp->if_flags & IFF_DEBUG 305 306 static int sppp_output(struct ifnet *, struct mbuf *, 307 const struct sockaddr *, const struct rtentry *); 308 309 static void sppp_cisco_send(struct sppp *, int, int32_t, int32_t); 310 static void sppp_cisco_input(struct sppp *, struct mbuf *); 311 312 static void sppp_cp_init(const struct cp *, struct sppp *); 313 static void sppp_cp_fini(const struct cp *, struct sppp *); 314 static void sppp_cp_input(const struct cp *, struct sppp *, 315 struct mbuf *); 316 static void sppp_cp_input(const struct cp *, struct sppp *, 317 struct mbuf *); 318 static void sppp_cp_send(struct sppp *, u_short, u_char, 319 u_char, u_short, void *); 320 /* static void sppp_cp_timeout(void *arg); */ 321 static void sppp_cp_change_state(const struct cp *, struct sppp *, int); 322 static struct workqueue * 323 sppp_wq_create(struct sppp *, const char *, pri_t, int, int); 324 static void sppp_wq_destroy(struct sppp *, struct workqueue *); 325 static void sppp_wq_set(struct sppp_work *, 326 void (*)(struct sppp *, void *), void *); 327 static void sppp_wq_add(struct workqueue *, struct sppp_work *); 328 static void sppp_wq_wait(struct workqueue *, struct sppp_work *); 329 static void sppp_cp_to_lcp(void *); 330 static void sppp_cp_to_ipcp(void *); 331 static void sppp_cp_to_ipv6cp(void *); 332 static void sppp_auth_send(const struct cp *, struct sppp *, 333 unsigned int, unsigned int, ...); 334 static int sppp_auth_role(const struct cp *, struct sppp *); 335 static void sppp_auth_to_event(struct sppp *, void *); 336 static void sppp_auth_sca_scn(const struct cp *, struct sppp *); 337 338 static void sppp_up_event(struct sppp *, void *); 339 static void sppp_down_event(struct sppp *, void *); 340 static void sppp_open_event(struct sppp *, void *); 341 static void sppp_close_event(struct sppp *, void *); 342 static void sppp_to_event(struct sppp *, void *); 343 static void sppp_rcr_event(struct sppp *, void *); 344 static void sppp_rca_event(struct sppp *, void *); 345 static void sppp_rcn_event(struct sppp *, void *); 346 static void sppp_rtr_event(struct sppp *, void *); 347 static void sppp_rta_event(struct sppp *, void *); 348 static void sppp_rxj_event(struct sppp *, void *); 349 350 static void sppp_null(struct sppp *); 351 static void sppp_tls(const struct cp *, struct sppp *); 352 static void sppp_tlf(const struct cp *, struct sppp *); 353 static void sppp_sca_scn(const struct cp *, struct sppp *); 354 static void sppp_ifdown(struct sppp *, void *); 355 356 static void sppp_lcp_init(struct sppp *); 357 static void sppp_lcp_up(struct sppp *, void *); 358 static void sppp_lcp_down(struct sppp *, void *); 359 static void sppp_lcp_open(struct sppp *, void *); 360 static int sppp_lcp_RCR(struct sppp *, struct lcp_header *, int); 361 static void sppp_lcp_RCN_rej(struct sppp *, struct lcp_header *, int); 362 static void sppp_lcp_RCN_nak(struct sppp *, struct lcp_header *, int); 363 static void sppp_lcp_tlu(struct sppp *); 364 static void sppp_lcp_tld(struct sppp *); 365 static void sppp_lcp_tls(const struct cp *, struct sppp *); 366 static void sppp_lcp_tlf(const struct cp *, struct sppp *); 367 static void sppp_lcp_scr(struct sppp *); 368 static void sppp_lcp_check_and_close(struct sppp *); 369 static int sppp_cp_check(struct sppp *, u_char); 370 371 static void sppp_ipcp_init(struct sppp *); 372 static void sppp_ipcp_open(struct sppp *, void *); 373 static void sppp_ipcp_close(struct sppp *, void *); 374 static int sppp_ipcp_RCR(struct sppp *, struct lcp_header *, int); 375 static void sppp_ipcp_RCN_rej(struct sppp *, struct lcp_header *, int); 376 static void sppp_ipcp_RCN_nak(struct sppp *, struct lcp_header *, int); 377 static void sppp_ipcp_tlu(struct sppp *); 378 static void sppp_ipcp_scr(struct sppp *); 379 380 static void sppp_ipv6cp_init(struct sppp *); 381 static void sppp_ipv6cp_open(struct sppp *, void *); 382 static int sppp_ipv6cp_RCR(struct sppp *, struct lcp_header *, int); 383 static void sppp_ipv6cp_RCN_rej(struct sppp *, struct lcp_header *, int); 384 static void sppp_ipv6cp_RCN_nak(struct sppp *, struct lcp_header *, int); 385 static void sppp_ipv6cp_tlu(struct sppp *); 386 static void sppp_ipv6cp_scr(struct sppp *); 387 388 static void sppp_pap_input(struct sppp *, struct mbuf *); 389 static void sppp_pap_init(struct sppp *); 390 static void sppp_pap_tlu(struct sppp *); 391 static void sppp_pap_scr(struct sppp *); 392 static void sppp_pap_scr(struct sppp *); 393 394 static void sppp_chap_input(struct sppp *, struct mbuf *); 395 static void sppp_chap_init(struct sppp *); 396 static void sppp_chap_open(struct sppp *, void *); 397 static void sppp_chap_tlu(struct sppp *); 398 static void sppp_chap_scr(struct sppp *); 399 static void sppp_chap_rcv_challenge_event(struct sppp *, void *); 400 401 static const char *sppp_auth_type_name(u_short, u_char); 402 static const char *sppp_cp_type_name(u_char); 403 static const char *sppp_dotted_quad(uint32_t); 404 static const char *sppp_ipcp_opt_name(u_char); 405 #ifdef INET6 406 static const char *sppp_ipv6cp_opt_name(u_char); 407 #endif 408 static const char *sppp_lcp_opt_name(u_char); 409 static const char *sppp_phase_name(int); 410 static const char *sppp_proto_name(u_short); 411 static const char *sppp_state_name(int); 412 static int sppp_params(struct sppp *, u_long, void *); 413 #ifdef INET 414 static void sppp_get_ip_addrs(struct sppp *, uint32_t *, uint32_t *, uint32_t *); 415 static void sppp_set_ip_addrs_work(struct work *, struct sppp *); 416 static void sppp_set_ip_addrs(struct sppp *); 417 static void sppp_clear_ip_addrs_work(struct work *, struct sppp *); 418 static void sppp_clear_ip_addrs(struct sppp *); 419 static void sppp_update_ip_addrs_work(struct work *, void *); 420 #endif 421 static void sppp_keepalive(void *); 422 static void sppp_phase_network(struct sppp *); 423 static void sppp_print_bytes(const u_char *, u_short); 424 static void sppp_print_string(const char *, u_short); 425 #ifdef INET6 426 static void sppp_get_ip6_addrs(struct sppp *, struct in6_addr *, 427 struct in6_addr *, struct in6_addr *); 428 #ifdef IPV6CP_MYIFID_DYN 429 static void sppp_set_ip6_addr(struct sppp *, const struct in6_addr *); 430 static void sppp_gen_ip6_addr(struct sppp *, const struct in6_addr *); 431 #endif 432 static void sppp_suggest_ip6_addr(struct sppp *, struct in6_addr *); 433 #endif 434 435 static void sppp_notify_up(struct sppp *); 436 static void sppp_notify_down(struct sppp *); 437 static void sppp_notify_tls_wlocked(struct sppp *); 438 static void sppp_notify_tlf_wlocked(struct sppp *); 439 #ifdef INET6 440 static void sppp_notify_con_wlocked(struct sppp *); 441 #endif 442 static void sppp_notify_con(struct sppp *); 443 444 static void sppp_notify_chg_wlocked(struct sppp *); 445 446 447 /* our control protocol descriptors */ 448 static const struct cp lcp = { 449 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 450 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_close_event, 451 sppp_to_event, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, 452 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, 453 sppp_lcp_scr, sppp_sca_scn 454 }; 455 456 static const struct cp ipcp = { 457 PPP_IPCP, IDX_IPCP, 458 #ifdef INET 459 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 460 #else 461 0, 462 #endif 463 "ipcp", 464 sppp_up_event, sppp_down_event, sppp_ipcp_open, sppp_ipcp_close, 465 sppp_to_event, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, 466 sppp_ipcp_tlu, sppp_null, sppp_tls, sppp_tlf, 467 sppp_ipcp_scr, sppp_sca_scn 468 }; 469 470 static const struct cp ipv6cp = { 471 PPP_IPV6CP, IDX_IPV6CP, 472 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 473 CP_NCP, 474 #else 475 0, 476 #endif 477 "ipv6cp", 478 sppp_up_event, sppp_down_event, sppp_ipv6cp_open, sppp_close_event, 479 sppp_to_event, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak, 480 sppp_ipv6cp_tlu, sppp_null, sppp_tls, sppp_tlf, 481 sppp_ipv6cp_scr, sppp_sca_scn 482 }; 483 484 static const struct cp pap = { 485 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 486 sppp_up_event, sppp_down_event, sppp_open_event, sppp_close_event, 487 sppp_to_event, 0, 0, 0, 488 sppp_pap_tlu, sppp_null, sppp_tls, sppp_tlf, 489 sppp_pap_scr, sppp_auth_sca_scn 490 }; 491 492 static const struct cp chap = { 493 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 494 sppp_up_event, sppp_down_event, sppp_chap_open, sppp_close_event, 495 sppp_auth_to_event, 0, 0, 0, 496 sppp_chap_tlu, sppp_null, sppp_tls, sppp_tlf, 497 sppp_chap_scr, sppp_auth_sca_scn 498 }; 499 500 static const struct cp *cps[IDX_COUNT] = { 501 &lcp, /* IDX_LCP */ 502 &ipcp, /* IDX_IPCP */ 503 &ipv6cp, /* IDX_IPV6CP */ 504 &pap, /* IDX_PAP */ 505 &chap, /* IDX_CHAP */ 506 }; 507 508 static void 509 sppp_change_phase(struct sppp *sp, int phase) 510 { 511 STDDCL; 512 513 KASSERT(SPPP_WLOCKED(sp)); 514 515 if (sp->pp_phase == phase) 516 return; 517 518 sp->pp_phase = phase; 519 520 if (phase == SPPP_PHASE_NETWORK) 521 if_link_state_change(ifp, LINK_STATE_UP); 522 else 523 if_link_state_change(ifp, LINK_STATE_DOWN); 524 525 if (debug) 526 { 527 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 528 sppp_phase_name(sp->pp_phase)); 529 } 530 } 531 532 /* 533 * Exported functions, comprising our interface to the lower layer. 534 */ 535 536 /* 537 * Process the received packet. 538 */ 539 void 540 sppp_input(struct ifnet *ifp, struct mbuf *m) 541 { 542 struct ppp_header *h = NULL; 543 pktqueue_t *pktq = NULL; 544 struct ifqueue *inq = NULL; 545 uint16_t protocol; 546 struct sppp *sp = (struct sppp *)ifp; 547 int debug = ifp->if_flags & IFF_DEBUG; 548 int isr = 0; 549 550 SPPP_LOCK(sp, RW_READER); 551 552 if (ifp->if_flags & IFF_UP) { 553 /* Count received bytes, add hardware framing */ 554 if_statadd(ifp, if_ibytes, m->m_pkthdr.len + sp->pp_framebytes); 555 /* Note time of last receive */ 556 sp->pp_last_receive = time_uptime; 557 } 558 559 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 560 /* Too small packet, drop it. */ 561 if (debug) 562 log(LOG_DEBUG, 563 "%s: input packet is too small, %d bytes\n", 564 ifp->if_xname, m->m_pkthdr.len); 565 drop: 566 if_statadd2(ifp, if_ierrors, 1, if_iqdrops, 1); 567 m_freem(m); 568 SPPP_UNLOCK(sp); 569 return; 570 } 571 572 if (sp->pp_flags & PP_NOFRAMING) { 573 memcpy(&protocol, mtod(m, void *), 2); 574 protocol = ntohs(protocol); 575 m_adj(m, 2); 576 } else { 577 578 /* Get PPP header. */ 579 h = mtod(m, struct ppp_header *); 580 m_adj(m, PPP_HEADER_LEN); 581 582 switch (h->address) { 583 case PPP_ALLSTATIONS: 584 if (h->control != PPP_UI) 585 goto invalid; 586 if (sp->pp_flags & PP_CISCO) { 587 if (debug) 588 log(LOG_DEBUG, 589 "%s: PPP packet in Cisco mode " 590 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 591 ifp->if_xname, 592 h->address, h->control, ntohs(h->protocol)); 593 goto drop; 594 } 595 break; 596 case CISCO_MULTICAST: 597 case CISCO_UNICAST: 598 /* Don't check the control field here (RFC 1547). */ 599 if (! (sp->pp_flags & PP_CISCO)) { 600 if (debug) 601 log(LOG_DEBUG, 602 "%s: Cisco packet in PPP mode " 603 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 604 ifp->if_xname, 605 h->address, h->control, ntohs(h->protocol)); 606 goto drop; 607 } 608 switch (ntohs(h->protocol)) { 609 default: 610 if_statinc(ifp, if_noproto); 611 goto invalid; 612 case CISCO_KEEPALIVE: 613 SPPP_UNLOCK(sp); 614 sppp_cisco_input((struct sppp *) ifp, m); 615 m_freem(m); 616 return; 617 #ifdef INET 618 case ETHERTYPE_IP: 619 pktq = ip_pktq; 620 break; 621 #endif 622 #ifdef INET6 623 case ETHERTYPE_IPV6: 624 pktq = ip6_pktq; 625 break; 626 #endif 627 } 628 goto queue_pkt; 629 default: /* Invalid PPP packet. */ 630 invalid: 631 if (debug) 632 log(LOG_DEBUG, 633 "%s: invalid input packet " 634 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 635 ifp->if_xname, 636 h->address, h->control, ntohs(h->protocol)); 637 goto drop; 638 } 639 protocol = ntohs(h->protocol); 640 } 641 642 switch (protocol) { 643 default: 644 if (sp->scp[IDX_LCP].state == STATE_OPENED) { 645 uint16_t prot = htons(protocol); 646 647 SPPP_UPGRADE(sp); 648 sppp_cp_send(sp, PPP_LCP, PROTO_REJ, 649 ++sp->scp[IDX_LCP].seq, m->m_pkthdr.len + 2, 650 &prot); 651 SPPP_DOWNGRADE(sp); 652 } 653 if (debug) 654 log(LOG_DEBUG, 655 "%s: invalid input protocol " 656 "<proto=0x%x>\n", ifp->if_xname, ntohs(protocol)); 657 if_statinc(ifp, if_noproto); 658 goto drop; 659 case PPP_LCP: 660 SPPP_UNLOCK(sp); 661 sppp_cp_input(&lcp, sp, m); 662 m_freem(m); 663 return; 664 case PPP_PAP: 665 SPPP_UNLOCK(sp); 666 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 667 sppp_pap_input(sp, m); 668 } 669 m_freem(m); 670 return; 671 case PPP_CHAP: 672 SPPP_UNLOCK(sp); 673 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 674 sppp_chap_input(sp, m); 675 } 676 m_freem(m); 677 return; 678 #ifdef INET 679 case PPP_IPCP: 680 SPPP_UNLOCK(sp); 681 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 682 sppp_cp_input(&ipcp, sp, m); 683 } 684 m_freem(m); 685 return; 686 case PPP_IP: 687 if (sp->scp[IDX_IPCP].state == STATE_OPENED) { 688 sp->pp_last_activity = time_uptime; 689 pktq = ip_pktq; 690 } 691 break; 692 #endif 693 #ifdef INET6 694 case PPP_IPV6CP: 695 SPPP_UNLOCK(sp); 696 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 697 sppp_cp_input(&ipv6cp, sp, m); 698 } 699 m_freem(m); 700 return; 701 702 case PPP_IPV6: 703 if (sp->scp[IDX_IPV6CP].state == STATE_OPENED) { 704 sp->pp_last_activity = time_uptime; 705 pktq = ip6_pktq; 706 } 707 break; 708 #endif 709 } 710 711 queue_pkt: 712 if ((ifp->if_flags & IFF_UP) == 0 || (!inq && !pktq)) { 713 goto drop; 714 } 715 716 /* Check queue. */ 717 if (__predict_true(pktq)) { 718 if (__predict_false(!pktq_enqueue(pktq, m, 0))) { 719 goto drop; 720 } 721 SPPP_UNLOCK(sp); 722 return; 723 } 724 725 SPPP_UNLOCK(sp); 726 727 IFQ_LOCK(inq); 728 if (IF_QFULL(inq)) { 729 /* Queue overflow. */ 730 IF_DROP(inq); 731 IFQ_UNLOCK(inq); 732 if (debug) 733 log(LOG_DEBUG, "%s: protocol queue overflow\n", 734 ifp->if_xname); 735 736 SPPP_LOCK(sp, RW_READER); 737 goto drop; 738 } 739 IF_ENQUEUE(inq, m); 740 IFQ_UNLOCK(inq); 741 schednetisr(isr); 742 } 743 744 /* 745 * Enqueue transmit packet. 746 */ 747 static int 748 sppp_output(struct ifnet *ifp, struct mbuf *m, 749 const struct sockaddr *dst, const struct rtentry *rt) 750 { 751 struct sppp *sp = (struct sppp *) ifp; 752 struct ppp_header *h = NULL; 753 #ifndef SPPPSUBR_MPSAFE 754 struct ifqueue *ifq = NULL; /* XXX */ 755 #endif 756 int s, error = 0; 757 uint16_t protocol; 758 size_t pktlen; 759 760 s = splnet(); 761 SPPP_LOCK(sp, RW_READER); 762 763 sp->pp_last_activity = time_uptime; 764 765 if ((ifp->if_flags & IFF_UP) == 0 || 766 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 767 SPPP_UNLOCK(sp); 768 splx(s); 769 770 m_freem(m); 771 772 return (ENETDOWN); 773 } 774 775 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 776 /* 777 * Interface is not yet running, but auto-dial. Need 778 * to start LCP for it. 779 */ 780 ifp->if_flags |= IFF_RUNNING; 781 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 782 } 783 784 /* 785 * If the queueing discipline needs packet classification, 786 * do it before prepending link headers. 787 */ 788 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family); 789 790 #ifdef INET 791 if (dst->sa_family == AF_INET) { 792 struct ip *ip = NULL; 793 #ifndef SPPPSUBR_MPSAFE 794 struct tcphdr *th = NULL; 795 #endif 796 797 if (m->m_len >= sizeof(struct ip)) { 798 ip = mtod(m, struct ip *); 799 #ifndef SPPPSUBR_MPSAFE 800 if (ip->ip_p == IPPROTO_TCP && 801 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + 802 sizeof(struct tcphdr)) { 803 th = (struct tcphdr *) 804 ((char *)ip + (ip->ip_hl << 2)); 805 } 806 #endif 807 } else 808 ip = NULL; 809 810 /* 811 * When using dynamic local IP address assignment by using 812 * 0.0.0.0 as a local address, the first TCP session will 813 * not connect because the local TCP checksum is computed 814 * using 0.0.0.0 which will later become our real IP address 815 * so the TCP checksum computed at the remote end will 816 * become invalid. So we 817 * - don't let packets with src ip addr 0 thru 818 * - we flag TCP packets with src ip 0 as an error 819 */ 820 if (ip && ip->ip_src.s_addr == INADDR_ANY) { 821 uint8_t proto = ip->ip_p; 822 823 SPPP_UNLOCK(sp); 824 splx(s); 825 826 m_freem(m); 827 if (proto == IPPROTO_TCP) 828 return (EADDRNOTAVAIL); 829 else 830 return (0); 831 } 832 833 #ifndef SPPPSUBR_MPSAFE 834 /* 835 * Put low delay, telnet, rlogin and ftp control packets 836 * in front of the queue. 837 */ 838 if (!IF_QFULL(&sp->pp_fastq) && 839 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 840 (th && (INTERACTIVE(ntohs(th->th_sport)) || 841 INTERACTIVE(ntohs(th->th_dport)))))) 842 ifq = &sp->pp_fastq; 843 #endif /* !SPPPSUBR_MPSAFE */ 844 } 845 #endif 846 847 #ifdef INET6 848 if (dst->sa_family == AF_INET6) { 849 /* XXX do something tricky here? */ 850 } 851 #endif 852 853 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 854 /* 855 * Prepend general data packet PPP header. For now, IP only. 856 */ 857 M_PREPEND(m, PPP_HEADER_LEN, M_DONTWAIT); 858 if (! m) { 859 if (ifp->if_flags & IFF_DEBUG) 860 log(LOG_DEBUG, "%s: no memory for transmit header\n", 861 ifp->if_xname); 862 if_statinc(ifp, if_oerrors); 863 SPPP_UNLOCK(sp); 864 splx(s); 865 return (ENOBUFS); 866 } 867 /* 868 * May want to check size of packet 869 * (albeit due to the implementation it's always enough) 870 */ 871 h = mtod(m, struct ppp_header *); 872 if (sp->pp_flags & PP_CISCO) { 873 h->address = CISCO_UNICAST; /* unicast address */ 874 h->control = 0; 875 } else { 876 h->address = PPP_ALLSTATIONS; /* broadcast address */ 877 h->control = PPP_UI; /* Unnumbered Info */ 878 } 879 } 880 881 switch (dst->sa_family) { 882 #ifdef INET 883 case AF_INET: /* Internet Protocol */ 884 if (sp->pp_flags & PP_CISCO) 885 protocol = htons(ETHERTYPE_IP); 886 else { 887 /* 888 * Don't choke with an ENETDOWN early. It's 889 * possible that we just started dialing out, 890 * so don't drop the packet immediately. If 891 * we notice that we run out of buffer space 892 * below, we will however remember that we are 893 * not ready to carry IP packets, and return 894 * ENETDOWN, as opposed to ENOBUFS. 895 */ 896 protocol = htons(PPP_IP); 897 if (sp->scp[IDX_IPCP].state != STATE_OPENED) 898 error = ENETDOWN; 899 } 900 break; 901 #endif 902 #ifdef INET6 903 case AF_INET6: /* Internet Protocol version 6 */ 904 if (sp->pp_flags & PP_CISCO) 905 protocol = htons(ETHERTYPE_IPV6); 906 else { 907 /* 908 * Don't choke with an ENETDOWN early. It's 909 * possible that we just started dialing out, 910 * so don't drop the packet immediately. If 911 * we notice that we run out of buffer space 912 * below, we will however remember that we are 913 * not ready to carry IP packets, and return 914 * ENETDOWN, as opposed to ENOBUFS. 915 */ 916 protocol = htons(PPP_IPV6); 917 if (sp->scp[IDX_IPV6CP].state != STATE_OPENED) 918 error = ENETDOWN; 919 } 920 break; 921 #endif 922 default: 923 m_freem(m); 924 if_statinc(ifp, if_oerrors); 925 SPPP_UNLOCK(sp); 926 splx(s); 927 return (EAFNOSUPPORT); 928 } 929 930 if (sp->pp_flags & PP_NOFRAMING) { 931 M_PREPEND(m, 2, M_DONTWAIT); 932 if (m == NULL) { 933 if (ifp->if_flags & IFF_DEBUG) 934 log(LOG_DEBUG, "%s: no memory for transmit header\n", 935 ifp->if_xname); 936 if_statinc(ifp, if_oerrors); 937 SPPP_UNLOCK(sp); 938 splx(s); 939 return (ENOBUFS); 940 } 941 *mtod(m, uint16_t *) = protocol; 942 } else { 943 h->protocol = protocol; 944 } 945 946 pktlen = m->m_pkthdr.len; 947 #ifdef SPPPSUBR_MPSAFE 948 SPPP_UNLOCK(sp); 949 error = if_transmit_lock(ifp, m); 950 SPPP_LOCK(sp, RW_READER); 951 if (error == 0) 952 if_statadd(ifp, if_obytes, pktlen + sp->pp_framebytes); 953 #else /* !SPPPSUBR_MPSAFE */ 954 error = ifq_enqueue2(ifp, ifq, m); 955 956 if (error == 0) { 957 /* 958 * Count output packets and bytes. 959 * The packet length includes header + additional hardware 960 * framing according to RFC 1333. 961 */ 962 if (!(ifp->if_flags & IFF_OACTIVE)) { 963 SPPP_UNLOCK(sp); 964 if_start_lock(ifp); 965 SPPP_LOCK(sp, RW_READER); 966 } 967 if_statadd(ifp, if_obytes, pktlen + sp->pp_framebytes); 968 } 969 #endif /* !SPPPSUBR_MPSAFE */ 970 SPPP_UNLOCK(sp); 971 splx(s); 972 return error; 973 } 974 975 void 976 sppp_attach(struct ifnet *ifp) 977 { 978 struct sppp *sp = (struct sppp *) ifp; 979 char xnamebuf[MAXCOMLEN]; 980 981 /* Initialize keepalive handler. */ 982 if (! spppq) { 983 callout_init(&keepalive_ch, CALLOUT_MPSAFE); 984 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 985 } 986 987 if (! spppq_lock) 988 spppq_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_SOFTNET); 989 990 sp->pp_if.if_type = IFT_PPP; 991 sp->pp_if.if_output = sppp_output; 992 sp->pp_fastq.ifq_maxlen = 32; 993 sp->pp_cpq.ifq_maxlen = 20; 994 sp->pp_loopcnt = 0; 995 sp->pp_alivecnt = 0; 996 sp->pp_last_activity = 0; 997 sp->pp_last_receive = 0; 998 sp->pp_maxalive = DEFAULT_MAXALIVECNT; 999 sp->pp_max_noreceive = DEFAULT_NORECV_TIME; 1000 sp->pp_idle_timeout = 0; 1001 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 1002 sp->pp_phase = SPPP_PHASE_DEAD; 1003 sp->pp_up = sppp_notify_up; 1004 sp->pp_down = sppp_notify_down; 1005 sppp_wq_set(&sp->work_ifdown, sppp_ifdown, NULL); 1006 memset(sp->scp, 0, sizeof(sp->scp)); 1007 rw_init(&sp->pp_lock); 1008 1009 if_alloc_sadl(ifp); 1010 1011 /* Lets not beat about the bush, we know we're down. */ 1012 ifp->if_link_state = LINK_STATE_DOWN; 1013 1014 snprintf(xnamebuf, sizeof(xnamebuf), "%s.wq_cp", ifp->if_xname); 1015 sp->wq_cp = sppp_wq_create(sp, xnamebuf, 1016 PRI_SOFTNET, IPL_SOFTNET, WQ_MPSAFE); 1017 1018 memset(&sp->myauth, 0, sizeof sp->myauth); 1019 memset(&sp->hisauth, 0, sizeof sp->hisauth); 1020 SPPP_LOCK(sp, RW_WRITER); 1021 sppp_lcp_init(sp); 1022 sppp_ipcp_init(sp); 1023 sppp_ipv6cp_init(sp); 1024 sppp_pap_init(sp); 1025 sppp_chap_init(sp); 1026 SPPP_UNLOCK(sp); 1027 1028 SPPPQ_LOCK(); 1029 /* Insert new entry into the keepalive list. */ 1030 sp->pp_next = spppq; 1031 spppq = sp; 1032 SPPPQ_UNLOCK(); 1033 } 1034 1035 void 1036 sppp_detach(struct ifnet *ifp) 1037 { 1038 struct sppp **q, *p, *sp = (struct sppp *) ifp; 1039 1040 /* Remove the entry from the keepalive list. */ 1041 SPPPQ_LOCK(); 1042 for (q = &spppq; (p = *q); q = &p->pp_next) 1043 if (p == sp) { 1044 *q = p->pp_next; 1045 break; 1046 } 1047 SPPPQ_UNLOCK(); 1048 1049 if (! spppq) { 1050 /* Stop keepalive handler. */ 1051 callout_stop(&keepalive_ch); 1052 mutex_obj_free(spppq_lock); 1053 spppq_lock = NULL; 1054 } 1055 1056 SPPP_LOCK(sp, RW_WRITER); 1057 1058 /* to avoid workqueue enqueued */ 1059 atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1); 1060 workqueue_wait(sp->ipcp.update_addrs_wq, &sp->ipcp.update_addrs_wk); 1061 workqueue_destroy(sp->ipcp.update_addrs_wq); 1062 pcq_destroy(sp->ipcp.update_addrs_q); 1063 1064 sppp_cp_fini(&lcp, sp); 1065 sppp_cp_fini(&ipcp, sp); 1066 sppp_cp_fini(&pap, sp); 1067 sppp_cp_fini(&chap, sp); 1068 #ifdef INET6 1069 sppp_cp_fini(&ipv6cp, sp); 1070 #endif 1071 sppp_wq_destroy(sp, sp->wq_cp); 1072 1073 /* free authentication info */ 1074 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 1075 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 1076 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 1077 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 1078 SPPP_UNLOCK(sp); 1079 rw_destroy(&sp->pp_lock); 1080 } 1081 1082 /* 1083 * Flush the interface output queue. 1084 */ 1085 void 1086 sppp_flush(struct ifnet *ifp) 1087 { 1088 struct sppp *sp = (struct sppp *) ifp; 1089 1090 SPPP_LOCK(sp, RW_WRITER); 1091 IFQ_PURGE(&sp->pp_if.if_snd); 1092 IF_PURGE(&sp->pp_fastq); 1093 IF_PURGE(&sp->pp_cpq); 1094 SPPP_UNLOCK(sp); 1095 } 1096 1097 /* 1098 * Check if the output queue is empty. 1099 */ 1100 int 1101 sppp_isempty(struct ifnet *ifp) 1102 { 1103 struct sppp *sp = (struct sppp *) ifp; 1104 int empty, s; 1105 1106 s = splnet(); 1107 SPPP_LOCK(sp, RW_READER); 1108 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1109 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1110 SPPP_UNLOCK(sp); 1111 splx(s); 1112 return (empty); 1113 } 1114 1115 /* 1116 * Get next packet to send. 1117 */ 1118 struct mbuf * 1119 sppp_dequeue(struct ifnet *ifp) 1120 { 1121 struct sppp *sp = (struct sppp *) ifp; 1122 struct mbuf *m; 1123 int s; 1124 1125 s = splnet(); 1126 SPPP_LOCK(sp, RW_WRITER); 1127 /* 1128 * Process only the control protocol queue until we have at 1129 * least one NCP open. 1130 * 1131 * Do always serve all three queues in Cisco mode. 1132 */ 1133 IF_DEQUEUE(&sp->pp_cpq, m); 1134 if (m == NULL && 1135 (sppp_cp_check(sp, CP_NCP) || (sp->pp_flags & PP_CISCO) != 0)) { 1136 IF_DEQUEUE(&sp->pp_fastq, m); 1137 if (m == NULL) 1138 IFQ_DEQUEUE(&sp->pp_if.if_snd, m); 1139 } 1140 SPPP_UNLOCK(sp); 1141 splx(s); 1142 return m; 1143 } 1144 1145 /* 1146 * Process an ioctl request. Called on low priority level. 1147 */ 1148 int 1149 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1150 { 1151 struct lwp *l = curlwp; /* XXX */ 1152 struct ifreq *ifr = (struct ifreq *) data; 1153 struct ifaddr *ifa = (struct ifaddr *) data; 1154 struct sppp *sp = (struct sppp *) ifp; 1155 int s, error=0, going_up, going_down; 1156 u_short newmode; 1157 1158 s = splnet(); 1159 switch (cmd) { 1160 case SIOCINITIFADDR: 1161 ifa->ifa_rtrequest = p2p_rtrequest; 1162 break; 1163 1164 case SIOCSIFFLAGS: 1165 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1166 break; 1167 1168 SPPP_LOCK(sp, RW_WRITER); 1169 going_up = ifp->if_flags & IFF_UP && 1170 (ifp->if_flags & IFF_RUNNING) == 0; 1171 going_down = (ifp->if_flags & IFF_UP) == 0 && 1172 ifp->if_flags & IFF_RUNNING; 1173 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1174 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1175 /* sanity */ 1176 newmode = IFF_PASSIVE; 1177 ifp->if_flags &= ~IFF_AUTO; 1178 } 1179 1180 if (going_up || going_down) { 1181 sp->lcp.reestablish = false; 1182 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 1183 } 1184 if (going_up && newmode == 0) { 1185 /* neither auto-dial nor passive */ 1186 ifp->if_flags |= IFF_RUNNING; 1187 if (!(sp->pp_flags & PP_CISCO)) { 1188 sppp_wq_add(sp->wq_cp, 1189 &sp->scp[IDX_LCP].work_open); 1190 } 1191 } else if (going_down) { 1192 SPPP_UNLOCK(sp); 1193 sppp_flush(ifp); 1194 SPPP_LOCK(sp, RW_WRITER); 1195 1196 ifp->if_flags &= ~IFF_RUNNING; 1197 } 1198 SPPP_UNLOCK(sp); 1199 break; 1200 1201 case SIOCSIFMTU: 1202 if (ifr->ifr_mtu < PPP_MINMRU || 1203 ifr->ifr_mtu > sp->lcp.their_mru) { 1204 error = EINVAL; 1205 break; 1206 } 1207 /*FALLTHROUGH*/ 1208 case SIOCGIFMTU: 1209 if ((error = ifioctl_common(ifp, cmd, data)) == ENETRESET) 1210 error = 0; 1211 break; 1212 case SIOCADDMULTI: 1213 case SIOCDELMULTI: 1214 break; 1215 1216 case SPPPSETAUTHCFG: 1217 case SPPPSETLCPCFG: 1218 case SPPPSETIDLETO: 1219 case SPPPSETAUTHFAILURE: 1220 case SPPPSETDNSOPTS: 1221 case SPPPSETKEEPALIVE: 1222 #if defined(COMPAT_50) || defined(MODULAR) 1223 case __SPPPSETIDLETO50: 1224 case __SPPPSETKEEPALIVE50: 1225 #endif /* COMPAT_50 || MODULAR */ 1226 error = kauth_authorize_network(l->l_cred, 1227 KAUTH_NETWORK_INTERFACE, 1228 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, 1229 NULL); 1230 if (error) 1231 break; 1232 error = sppp_params(sp, cmd, data); 1233 break; 1234 1235 case SPPPGETAUTHCFG: 1236 case SPPPGETLCPCFG: 1237 case SPPPGETAUTHFAILURES: 1238 error = kauth_authorize_network(l->l_cred, 1239 KAUTH_NETWORK_INTERFACE, 1240 KAUTH_REQ_NETWORK_INTERFACE_GETPRIV, ifp, (void *)cmd, 1241 NULL); 1242 if (error) 1243 break; 1244 error = sppp_params(sp, cmd, data); 1245 break; 1246 1247 case SPPPGETSTATUS: 1248 case SPPPGETSTATUSNCP: 1249 case SPPPGETIDLETO: 1250 case SPPPGETDNSOPTS: 1251 case SPPPGETDNSADDRS: 1252 case SPPPGETKEEPALIVE: 1253 #if defined(COMPAT_50) || defined(MODULAR) 1254 case __SPPPGETIDLETO50: 1255 case __SPPPGETKEEPALIVE50: 1256 #endif /* COMPAT_50 || MODULAR */ 1257 error = sppp_params(sp, cmd, data); 1258 break; 1259 1260 default: 1261 error = ifioctl_common(ifp, cmd, data); 1262 break; 1263 } 1264 splx(s); 1265 return (error); 1266 } 1267 1268 1269 /* 1270 * Cisco framing implementation. 1271 */ 1272 1273 /* 1274 * Handle incoming Cisco keepalive protocol packets. 1275 */ 1276 static void 1277 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1278 { 1279 STDDCL; 1280 struct cisco_packet *h; 1281 #ifdef INET 1282 uint32_t me, mymask = 0; /* XXX: GCC */ 1283 #endif 1284 1285 SPPP_LOCK(sp, RW_WRITER); 1286 1287 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1288 if (debug) 1289 log(LOG_DEBUG, 1290 "%s: cisco invalid packet length: %d bytes\n", 1291 ifp->if_xname, m->m_pkthdr.len); 1292 SPPP_UNLOCK(sp); 1293 return; 1294 } 1295 h = mtod(m, struct cisco_packet *); 1296 if (debug) 1297 log(LOG_DEBUG, 1298 "%s: cisco input: %d bytes " 1299 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1300 ifp->if_xname, m->m_pkthdr.len, 1301 ntohl(h->type), h->par1, h->par2, (u_int)h->rel, 1302 (u_int)h->time0, (u_int)h->time1); 1303 switch (ntohl(h->type)) { 1304 default: 1305 if (debug) 1306 addlog("%s: cisco unknown packet type: 0x%x\n", 1307 ifp->if_xname, ntohl(h->type)); 1308 break; 1309 case CISCO_ADDR_REPLY: 1310 /* Reply on address request, ignore */ 1311 break; 1312 case CISCO_KEEPALIVE_REQ: 1313 sp->pp_alivecnt = 0; 1314 sp->scp[IDX_LCP].rseq = ntohl(h->par1); 1315 if (sp->scp[IDX_LCP].seq == sp->scp[IDX_LCP].rseq) { 1316 /* Local and remote sequence numbers are equal. 1317 * Probably, the line is in loopback mode. */ 1318 if (sp->pp_loopcnt >= LOOPALIVECNT) { 1319 printf ("%s: loopback\n", 1320 ifp->if_xname); 1321 sp->pp_loopcnt = 0; 1322 if (ifp->if_flags & IFF_UP) { 1323 SPPP_UNLOCK(sp); 1324 if_down(ifp); 1325 SPPP_LOCK(sp, RW_WRITER); 1326 1327 IF_PURGE(&sp->pp_cpq); 1328 } 1329 } 1330 ++sp->pp_loopcnt; 1331 1332 /* Generate new local sequence number */ 1333 sp->scp[IDX_LCP].seq = cprng_fast32(); 1334 break; 1335 } 1336 sp->pp_loopcnt = 0; 1337 if (! (ifp->if_flags & IFF_UP) && 1338 (ifp->if_flags & IFF_RUNNING)) { 1339 SPPP_UNLOCK(sp); 1340 if_up(ifp); 1341 SPPP_LOCK(sp, RW_WRITER); 1342 } 1343 break; 1344 case CISCO_ADDR_REQ: 1345 #ifdef INET 1346 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1347 if (me != 0L) 1348 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1349 #endif 1350 break; 1351 } 1352 SPPP_UNLOCK(sp); 1353 } 1354 1355 /* 1356 * Send Cisco keepalive packet. 1357 */ 1358 static void 1359 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1360 { 1361 STDDCL; 1362 struct ppp_header *h; 1363 struct cisco_packet *ch; 1364 struct mbuf *m; 1365 uint32_t t; 1366 1367 KASSERT(SPPP_WLOCKED(sp)); 1368 1369 t = time_uptime * 1000; 1370 MGETHDR(m, M_DONTWAIT, MT_DATA); 1371 if (! m) 1372 return; 1373 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1374 m_reset_rcvif(m); 1375 1376 h = mtod(m, struct ppp_header *); 1377 h->address = CISCO_MULTICAST; 1378 h->control = 0; 1379 h->protocol = htons(CISCO_KEEPALIVE); 1380 1381 ch = (struct cisco_packet *)(h + 1); 1382 ch->type = htonl(type); 1383 ch->par1 = htonl(par1); 1384 ch->par2 = htonl(par2); 1385 ch->rel = -1; 1386 1387 ch->time0 = htons((u_short)(t >> 16)); 1388 ch->time1 = htons((u_short) t); 1389 1390 if (debug) 1391 log(LOG_DEBUG, 1392 "%s: cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1393 ifp->if_xname, ntohl(ch->type), ch->par1, 1394 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1395 (u_int)ch->time1); 1396 1397 if (IF_QFULL(&sp->pp_cpq)) { 1398 IF_DROP(&sp->pp_fastq); 1399 IF_DROP(&ifp->if_snd); 1400 m_freem(m); 1401 if_statinc(ifp, if_oerrors); 1402 return; 1403 } 1404 1405 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 1406 IF_ENQUEUE(&sp->pp_cpq, m); 1407 1408 if (! (ifp->if_flags & IFF_OACTIVE)) { 1409 SPPP_UNLOCK(sp); 1410 if_start_lock(ifp); 1411 SPPP_LOCK(sp, RW_WRITER); 1412 } 1413 } 1414 1415 /* 1416 * PPP protocol implementation. 1417 */ 1418 1419 /* 1420 * Send PPP control protocol packet. 1421 */ 1422 static void 1423 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1424 u_char ident, u_short len, void *data) 1425 { 1426 STDDCL; 1427 struct lcp_header *lh; 1428 struct mbuf *m; 1429 size_t pkthdrlen; 1430 1431 KASSERT(SPPP_WLOCKED(sp)); 1432 1433 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1434 1435 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1436 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1437 MGETHDR(m, M_DONTWAIT, MT_DATA); 1438 if (! m) { 1439 return; 1440 } 1441 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1442 m_reset_rcvif(m); 1443 1444 if (sp->pp_flags & PP_NOFRAMING) { 1445 *mtod(m, uint16_t *) = htons(proto); 1446 lh = (struct lcp_header *)(mtod(m, uint8_t *) + 2); 1447 } else { 1448 struct ppp_header *h; 1449 h = mtod(m, struct ppp_header *); 1450 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1451 h->control = PPP_UI; /* Unnumbered Info */ 1452 h->protocol = htons(proto); /* Link Control Protocol */ 1453 lh = (struct lcp_header *)(h + 1); 1454 } 1455 lh->type = type; 1456 lh->ident = ident; 1457 lh->len = htons(LCP_HEADER_LEN + len); 1458 if (len) 1459 memcpy(lh + 1, data, len); 1460 1461 if (debug) { 1462 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 1463 ifp->if_xname, 1464 sppp_proto_name(proto), 1465 sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len)); 1466 if (len) 1467 sppp_print_bytes((u_char *)(lh + 1), len); 1468 addlog(">\n"); 1469 } 1470 if (IF_QFULL(&sp->pp_cpq)) { 1471 IF_DROP(&sp->pp_fastq); 1472 IF_DROP(&ifp->if_snd); 1473 m_freem(m); 1474 if_statinc(ifp, if_oerrors); 1475 return; 1476 } 1477 1478 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 1479 IF_ENQUEUE(&sp->pp_cpq, m); 1480 1481 1482 if (! (ifp->if_flags & IFF_OACTIVE)) { 1483 SPPP_UNLOCK(sp); 1484 if_start_lock(ifp); 1485 SPPP_LOCK(sp, RW_WRITER); 1486 } 1487 } 1488 1489 static void 1490 sppp_cp_to_lcp(void *xsp) 1491 { 1492 struct sppp *sp = xsp; 1493 1494 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_to); 1495 } 1496 1497 static void 1498 sppp_cp_to_ipcp(void *xsp) 1499 { 1500 struct sppp *sp = xsp; 1501 1502 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_IPCP].work_to); 1503 } 1504 1505 static void 1506 sppp_cp_to_ipv6cp(void *xsp) 1507 { 1508 struct sppp *sp = xsp; 1509 1510 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_IPV6CP].work_to); 1511 } 1512 1513 static void 1514 sppp_cp_to_pap(void *xsp) 1515 { 1516 struct sppp *sp = xsp; 1517 1518 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_to); 1519 } 1520 1521 static void 1522 sppp_cp_to_chap(void *xsp) 1523 { 1524 struct sppp *sp = xsp; 1525 1526 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_to); 1527 } 1528 1529 1530 static void 1531 sppp_cp_init(const struct cp *cp, struct sppp *sp) 1532 { 1533 struct sppp_cp *scp; 1534 typedef void (*sppp_co_cb_t)(void *); 1535 static const sppp_co_cb_t to_cb[IDX_COUNT] = { 1536 [IDX_LCP] = sppp_cp_to_lcp, 1537 [IDX_IPCP] = sppp_cp_to_ipcp, 1538 [IDX_IPV6CP] = sppp_cp_to_ipv6cp, 1539 [IDX_PAP] = sppp_cp_to_pap, 1540 [IDX_CHAP] = sppp_cp_to_chap, 1541 }; 1542 1543 scp = &sp->scp[cp->protoidx]; 1544 1545 SPPP_WQ_SET(&scp->work_up, cp->Up, cp); 1546 SPPP_WQ_SET(&scp->work_down, cp->Down, cp); 1547 SPPP_WQ_SET(&scp->work_open, cp->Open, cp); 1548 SPPP_WQ_SET(&scp->work_close, cp->Close, cp); 1549 SPPP_WQ_SET(&scp->work_to, cp->TO, cp); 1550 SPPP_WQ_SET(&scp->work_rcr, sppp_rcr_event, cp); 1551 SPPP_WQ_SET(&scp->work_rca, sppp_rca_event, cp); 1552 SPPP_WQ_SET(&scp->work_rcn, sppp_rcn_event, cp); 1553 SPPP_WQ_SET(&scp->work_rtr, sppp_rtr_event, cp); 1554 SPPP_WQ_SET(&scp->work_rta, sppp_rta_event, cp); 1555 SPPP_WQ_SET(&scp->work_rxj, sppp_rxj_event, cp); 1556 1557 callout_init(&scp->ch, CALLOUT_MPSAFE); 1558 callout_setfunc(&scp->ch, to_cb[cp->protoidx], sp); 1559 } 1560 1561 static void 1562 sppp_cp_fini(const struct cp *cp, struct sppp *sp) 1563 { 1564 struct sppp_cp *scp; 1565 scp = &sp->scp[cp->protoidx]; 1566 1567 sppp_wq_wait(sp->wq_cp, &scp->work_up); 1568 sppp_wq_wait(sp->wq_cp, &scp->work_down); 1569 sppp_wq_wait(sp->wq_cp, &scp->work_open); 1570 sppp_wq_wait(sp->wq_cp, &scp->work_close); 1571 sppp_wq_wait(sp->wq_cp, &scp->work_to); 1572 sppp_wq_wait(sp->wq_cp, &scp->work_rcr); 1573 sppp_wq_wait(sp->wq_cp, &scp->work_rca); 1574 sppp_wq_wait(sp->wq_cp, &scp->work_rcn); 1575 sppp_wq_wait(sp->wq_cp, &scp->work_rtr); 1576 sppp_wq_wait(sp->wq_cp, &scp->work_rta); 1577 sppp_wq_wait(sp->wq_cp, &scp->work_rxj); 1578 1579 callout_halt(&scp->ch, NULL); 1580 callout_destroy(&scp->ch); 1581 } 1582 1583 /* 1584 * Handle incoming PPP control protocol packets. 1585 */ 1586 static void 1587 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1588 { 1589 STDDCL; 1590 struct lcp_header *h; 1591 int printlen, len = m->m_pkthdr.len; 1592 int rv; 1593 u_char *p; 1594 uint32_t u32; 1595 1596 SPPP_LOCK(sp, RW_WRITER); 1597 1598 if (len < 4) { 1599 if (debug) 1600 log(LOG_DEBUG, 1601 "%s: %s invalid packet length: %d bytes\n", 1602 ifp->if_xname, cp->name, len); 1603 SPPP_UNLOCK(sp); 1604 return; 1605 } 1606 h = mtod(m, struct lcp_header *); 1607 if (debug) { 1608 printlen = ntohs(h->len); 1609 log(LOG_DEBUG, 1610 "%s: %s input(%s): <%s id=0x%x len=%d", 1611 ifp->if_xname, cp->name, 1612 sppp_state_name(sp->scp[cp->protoidx].state), 1613 sppp_cp_type_name(h->type), h->ident, printlen); 1614 if (len < printlen) 1615 printlen = len; 1616 if (printlen > 4) 1617 sppp_print_bytes((u_char *)(h + 1), printlen - 4); 1618 addlog(">\n"); 1619 } 1620 if (len > ntohs(h->len)) 1621 len = ntohs(h->len); 1622 p = (u_char *)(h + 1); 1623 switch (h->type) { 1624 case CONF_REQ: 1625 if (len < 4) { 1626 if (debug) 1627 addlog("%s: %s invalid conf-req length %d\n", 1628 ifp->if_xname, cp->name, 1629 len); 1630 if_statinc(ifp, if_ierrors); 1631 break; 1632 } 1633 rv = (cp->RCR)(sp, h, len); 1634 if (rv < 0) { 1635 /* fatal error, shut down */ 1636 (cp->tld)(sp); 1637 lcp.tlf(&lcp, sp); 1638 SPPP_UNLOCK(sp); 1639 return; 1640 } 1641 sp->scp[cp->protoidx].rconfid = h->ident; 1642 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rcr); 1643 break; 1644 case CONF_ACK: 1645 if (h->ident != sp->scp[cp->protoidx].confid) { 1646 if (debug) 1647 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1648 ifp->if_xname, cp->name, 1649 h->ident, sp->scp[cp->protoidx].confid); 1650 if_statinc(ifp, if_ierrors); 1651 break; 1652 } 1653 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rca); 1654 break; 1655 case CONF_NAK: 1656 case CONF_REJ: 1657 if (h->ident != sp->scp[cp->protoidx].confid) { 1658 if (debug) 1659 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1660 ifp->if_xname, cp->name, 1661 h->ident, sp->scp[cp->protoidx].confid); 1662 if_statinc(ifp, if_ierrors); 1663 break; 1664 } 1665 if (h->type == CONF_NAK) 1666 (cp->RCN_nak)(sp, h, len); 1667 else /* CONF_REJ */ 1668 (cp->RCN_rej)(sp, h, len); 1669 1670 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rcn); 1671 break; 1672 1673 case TERM_REQ: 1674 sp->scp[cp->protoidx].rseq = h->ident; 1675 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rtr); 1676 break; 1677 case TERM_ACK: 1678 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rta); 1679 break; 1680 case CODE_REJ: 1681 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1682 log(LOG_INFO, 1683 "%s: %s: ignoring RXJ (%s) for code ?, " 1684 "danger will robinson\n", 1685 ifp->if_xname, cp->name, 1686 sppp_cp_type_name(h->type)); 1687 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rxj); 1688 break; 1689 case PROTO_REJ: 1690 { 1691 int catastrophic; 1692 const struct cp *upper; 1693 int i; 1694 uint16_t proto; 1695 1696 catastrophic = 0; 1697 upper = NULL; 1698 proto = p[0] << 8 | p[1]; 1699 for (i = 0; i < IDX_COUNT; i++) { 1700 if (cps[i]->proto == proto) { 1701 upper = cps[i]; 1702 break; 1703 } 1704 } 1705 if (upper == NULL) 1706 catastrophic++; 1707 1708 if (debug) 1709 log(LOG_INFO, 1710 "%s: %s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1711 ifp->if_xname, cp->name, catastrophic ? '-' : '+', 1712 sppp_cp_type_name(h->type), proto, 1713 upper ? upper->name : "unknown", 1714 upper ? sppp_state_name(sp->scp[upper->protoidx].state) : "?"); 1715 1716 /* 1717 * if we got RXJ+ against conf-req, the peer does not implement 1718 * this particular protocol type. terminate the protocol. 1719 */ 1720 if (upper && !catastrophic) { 1721 if (sp->scp[upper->protoidx].state == STATE_REQ_SENT) { 1722 sppp_wq_add(sp->wq_cp, 1723 &sp->scp[upper->protoidx].work_close); 1724 break; 1725 } 1726 } 1727 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rxj); 1728 break; 1729 } 1730 case DISC_REQ: 1731 if (cp->proto != PPP_LCP) 1732 goto illegal; 1733 /* Discard the packet. */ 1734 break; 1735 case ECHO_REQ: 1736 if (cp->proto != PPP_LCP) 1737 goto illegal; 1738 if (sp->scp[cp->protoidx].state != STATE_OPENED) { 1739 if (debug) 1740 addlog("%s: lcp echo req but lcp closed\n", 1741 ifp->if_xname); 1742 if_statinc(ifp, if_ierrors); 1743 break; 1744 } 1745 if (len < 8) { 1746 if (debug) 1747 addlog("%s: invalid lcp echo request " 1748 "packet length: %d bytes\n", 1749 ifp->if_xname, len); 1750 break; 1751 } 1752 memcpy(&u32, h + 1, sizeof u32); 1753 if (ntohl(u32) == sp->lcp.magic) { 1754 /* Line loopback mode detected. */ 1755 printf("%s: loopback\n", ifp->if_xname); 1756 SPPP_UNLOCK(sp); 1757 if_down(ifp); 1758 SPPP_LOCK(sp, RW_WRITER); 1759 1760 IF_PURGE(&sp->pp_cpq); 1761 1762 /* Shut down the PPP link. */ 1763 /* XXX */ 1764 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_down); 1765 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_up); 1766 break; 1767 } 1768 u32 = htonl(sp->lcp.magic); 1769 memcpy(h + 1, &u32, sizeof u32); 1770 if (debug) 1771 addlog("%s: got lcp echo req, sending echo rep\n", 1772 ifp->if_xname); 1773 sppp_cp_send(sp, PPP_LCP, ECHO_REPLY, h->ident, len - 4, 1774 h + 1); 1775 break; 1776 case ECHO_REPLY: 1777 if (cp->proto != PPP_LCP) 1778 goto illegal; 1779 if (h->ident != sp->lcp.echoid) { 1780 if_statinc(ifp, if_ierrors); 1781 break; 1782 } 1783 if (len < 8) { 1784 if (debug) 1785 addlog("%s: lcp invalid echo reply " 1786 "packet length: %d bytes\n", 1787 ifp->if_xname, len); 1788 break; 1789 } 1790 if (debug) 1791 addlog("%s: lcp got echo rep\n", 1792 ifp->if_xname); 1793 memcpy(&u32, h + 1, sizeof u32); 1794 if (ntohl(u32) != sp->lcp.magic) 1795 sp->pp_alivecnt = 0; 1796 break; 1797 default: 1798 /* Unknown packet type -- send Code-Reject packet. */ 1799 illegal: 1800 if (debug) 1801 addlog("%s: %s send code-rej for 0x%x\n", 1802 ifp->if_xname, cp->name, h->type); 1803 sppp_cp_send(sp, cp->proto, CODE_REJ, 1804 ++sp->scp[cp->protoidx].seq, m->m_pkthdr.len, h); 1805 if_statinc(ifp, if_ierrors); 1806 } 1807 1808 SPPP_UNLOCK(sp); 1809 } 1810 1811 1812 /* 1813 * The generic part of all Up/Down/Open/Close/TO event handlers. 1814 * Basically, the state transition handling in the automaton. 1815 */ 1816 static void 1817 sppp_up_event(struct sppp *sp, void *xcp) 1818 { 1819 const struct cp *cp = xcp; 1820 STDDCL; 1821 1822 KASSERT(SPPP_WLOCKED(sp)); 1823 1824 if ((cp->flags & CP_AUTH) != 0 && 1825 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1826 return; 1827 1828 if (debug) 1829 log(LOG_DEBUG, "%s: %s up(%s)\n", 1830 ifp->if_xname, cp->name, 1831 sppp_state_name(sp->scp[cp->protoidx].state)); 1832 1833 switch (sp->scp[cp->protoidx].state) { 1834 case STATE_INITIAL: 1835 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1836 break; 1837 case STATE_STARTING: 1838 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 1839 (cp->scr)(sp); 1840 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1841 break; 1842 default: 1843 printf("%s: %s illegal up in state %s\n", 1844 ifp->if_xname, cp->name, 1845 sppp_state_name(sp->scp[cp->protoidx].state)); 1846 } 1847 } 1848 1849 static void 1850 sppp_down_event(struct sppp *sp, void *xcp) 1851 { 1852 const struct cp *cp = xcp; 1853 STDDCL; 1854 1855 KASSERT(SPPP_WLOCKED(sp)); 1856 1857 if ((cp->flags & CP_AUTH) != 0 && 1858 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1859 return; 1860 1861 if (debug) 1862 log(LOG_DEBUG, "%s: %s down(%s)\n", 1863 ifp->if_xname, cp->name, 1864 sppp_state_name(sp->scp[cp->protoidx].state)); 1865 1866 switch (sp->scp[cp->protoidx].state) { 1867 case STATE_CLOSED: 1868 case STATE_CLOSING: 1869 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1870 break; 1871 case STATE_STOPPED: 1872 (cp->tls)(cp, sp); 1873 /* fall through */ 1874 case STATE_STOPPING: 1875 case STATE_REQ_SENT: 1876 case STATE_ACK_RCVD: 1877 case STATE_ACK_SENT: 1878 sppp_cp_change_state(cp, sp, STATE_STARTING); 1879 break; 1880 case STATE_OPENED: 1881 (cp->tld)(sp); 1882 sppp_cp_change_state(cp, sp, STATE_STARTING); 1883 break; 1884 default: 1885 printf("%s: %s illegal down in state %s\n", 1886 ifp->if_xname, cp->name, 1887 sppp_state_name(sp->scp[cp->protoidx].state)); 1888 } 1889 } 1890 1891 1892 static void 1893 sppp_open_event(struct sppp *sp, void *xcp) 1894 { 1895 const struct cp *cp = xcp; 1896 STDDCL; 1897 1898 KASSERT(SPPP_WLOCKED(sp)); 1899 1900 if ((cp->flags & CP_AUTH) != 0 && 1901 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1902 return; 1903 1904 if (debug) 1905 log(LOG_DEBUG, "%s: %s open(%s)\n", 1906 ifp->if_xname, cp->name, 1907 sppp_state_name(sp->scp[cp->protoidx].state)); 1908 1909 switch (sp->scp[cp->protoidx].state) { 1910 case STATE_INITIAL: 1911 sppp_cp_change_state(cp, sp, STATE_STARTING); 1912 (cp->tls)(cp, sp); 1913 break; 1914 case STATE_STARTING: 1915 break; 1916 case STATE_CLOSED: 1917 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 1918 (cp->scr)(sp); 1919 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1920 break; 1921 case STATE_STOPPED: 1922 case STATE_STOPPING: 1923 case STATE_REQ_SENT: 1924 case STATE_ACK_RCVD: 1925 case STATE_ACK_SENT: 1926 case STATE_OPENED: 1927 break; 1928 case STATE_CLOSING: 1929 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1930 break; 1931 } 1932 } 1933 1934 1935 static void 1936 sppp_close_event(struct sppp *sp, void *xcp) 1937 { 1938 const struct cp *cp = xcp; 1939 STDDCL; 1940 1941 KASSERT(SPPP_WLOCKED(sp)); 1942 1943 if ((cp->flags & CP_AUTH) != 0 && 1944 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1945 return; 1946 1947 if (debug) 1948 log(LOG_DEBUG, "%s: %s close(%s)\n", 1949 ifp->if_xname, cp->name, 1950 sppp_state_name(sp->scp[cp->protoidx].state)); 1951 1952 switch (sp->scp[cp->protoidx].state) { 1953 case STATE_INITIAL: 1954 case STATE_CLOSED: 1955 case STATE_CLOSING: 1956 break; 1957 case STATE_STARTING: 1958 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1959 (cp->tlf)(cp, sp); 1960 break; 1961 case STATE_STOPPED: 1962 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1963 break; 1964 case STATE_STOPPING: 1965 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1966 break; 1967 case STATE_OPENED: 1968 (cp->tld)(sp); 1969 /* fall through */ 1970 case STATE_REQ_SENT: 1971 case STATE_ACK_RCVD: 1972 case STATE_ACK_SENT: 1973 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_terminate; 1974 if ((cp->flags & CP_AUTH) == 0) { 1975 sppp_cp_send(sp, cp->proto, TERM_REQ, 1976 ++sp->scp[cp->protoidx].seq, 0, 0); 1977 } 1978 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1979 break; 1980 } 1981 } 1982 1983 static void 1984 sppp_to_event(struct sppp *sp, void *xcp) 1985 { 1986 const struct cp *cp = xcp; 1987 int s; 1988 STDDCL; 1989 1990 KASSERT(SPPP_WLOCKED(sp)); 1991 1992 s = splnet(); 1993 1994 if (debug) 1995 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 1996 ifp->if_xname, cp->name, 1997 sppp_state_name(sp->scp[cp->protoidx].state), 1998 sp->scp[cp->protoidx].rst_counter); 1999 2000 if (--sp->scp[cp->protoidx].rst_counter < 0) 2001 /* TO- event */ 2002 switch (sp->scp[cp->protoidx].state) { 2003 case STATE_CLOSING: 2004 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2005 (cp->tlf)(cp, sp); 2006 break; 2007 case STATE_STOPPING: 2008 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2009 (cp->tlf)(cp, sp); 2010 break; 2011 case STATE_REQ_SENT: 2012 case STATE_ACK_RCVD: 2013 case STATE_ACK_SENT: 2014 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2015 (cp->tlf)(cp, sp); 2016 break; 2017 } 2018 else 2019 /* TO+ event */ 2020 switch (sp->scp[cp->protoidx].state) { 2021 case STATE_CLOSING: 2022 case STATE_STOPPING: 2023 if ((cp->flags & CP_AUTH) == 0) { 2024 sppp_cp_send(sp, cp->proto, TERM_REQ, 2025 ++sp->scp[cp->protoidx].seq, 0, 0); 2026 } 2027 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2028 break; 2029 case STATE_REQ_SENT: 2030 case STATE_ACK_RCVD: 2031 (cp->scr)(sp); 2032 /* sppp_cp_change_state() will restart the timer */ 2033 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2034 break; 2035 case STATE_ACK_SENT: 2036 (cp->scr)(sp); 2037 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2038 break; 2039 } 2040 2041 splx(s); 2042 } 2043 2044 static void 2045 sppp_rcr_event(struct sppp *sp, void *xcp) 2046 { 2047 const struct cp *cp = xcp; 2048 u_char type; 2049 void *buf; 2050 size_t blen; 2051 STDDCL; 2052 2053 type = sp->scp[cp->protoidx].rcr_type; 2054 buf = sp->scp[cp->protoidx].rcr_buf; 2055 blen = sp->scp[cp->protoidx].rcr_blen; 2056 2057 if (type == CONF_ACK) { 2058 /* RCR+ event */ 2059 switch (sp->scp[cp->protoidx].state) { 2060 case STATE_OPENED: 2061 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2062 cp->tld(sp); 2063 cp->scr(sp); 2064 cp->scan(cp, sp); 2065 break; 2066 case STATE_ACK_SENT: 2067 case STATE_REQ_SENT: 2068 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2069 cp->scan(cp, sp); 2070 break; 2071 case STATE_STOPPED: 2072 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2073 cp->scr(sp); 2074 cp->scan(cp, sp); 2075 break; 2076 case STATE_ACK_RCVD: 2077 sppp_cp_change_state(cp, sp, STATE_OPENED); 2078 if (debug) 2079 log(LOG_DEBUG, "%s: %s tlu\n", 2080 ifp->if_xname, 2081 cp->name); 2082 cp->tlu(sp); 2083 cp->scan(cp, sp); 2084 break; 2085 case STATE_CLOSING: 2086 case STATE_STOPPING: 2087 if (buf != NULL) { 2088 sp->scp[cp->protoidx].rcr_buf = NULL; 2089 sp->scp[cp->protoidx].rcr_blen = 0; 2090 kmem_free(buf, blen); 2091 } 2092 break; 2093 case STATE_CLOSED: 2094 if ((cp->flags & CP_AUTH) == 0) { 2095 sppp_cp_send(sp, cp->proto, TERM_ACK, 2096 sp->scp[cp->protoidx].rconfid, 0, 0); 2097 } 2098 break; 2099 default: 2100 printf("%s: %s illegal RCR+ in state %s\n", 2101 ifp->if_xname, cp->name, 2102 sppp_state_name(sp->scp[cp->protoidx].state)); 2103 if_statinc(ifp, if_ierrors); 2104 } 2105 } else { 2106 /* RCR- event */ 2107 switch (sp->scp[cp->protoidx].state) { 2108 case STATE_OPENED: 2109 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2110 cp->tld(sp); 2111 cp->scr(sp); 2112 cp->scan(cp, sp); 2113 break; 2114 case STATE_ACK_SENT: 2115 case STATE_REQ_SENT: 2116 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2117 cp->scan(cp, sp); 2118 break; 2119 case STATE_STOPPED: 2120 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2121 cp->scr(sp); 2122 cp->scan(cp, sp); 2123 break; 2124 case STATE_ACK_RCVD: 2125 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2126 cp->scan(cp, sp); 2127 break; 2128 case STATE_CLOSING: 2129 case STATE_STOPPING: 2130 if (buf != NULL) { 2131 sp->scp[cp->protoidx].rcr_buf = NULL; 2132 sp->scp[cp->protoidx].rcr_blen = 0; 2133 kmem_free(buf, blen); 2134 } 2135 break; 2136 case STATE_CLOSED: 2137 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2138 if ((cp->flags & CP_AUTH) == 0) { 2139 sppp_cp_send(sp, cp->proto, TERM_ACK, 2140 sp->scp[cp->protoidx].rconfid, 0, 0); 2141 } 2142 break; 2143 default: 2144 printf("%s: %s illegal RCR- in state %s\n", 2145 ifp->if_xname, cp->name, 2146 sppp_state_name(sp->scp[cp->protoidx].state)); 2147 if_statinc(ifp, if_ierrors); 2148 } 2149 } 2150 } 2151 2152 static void 2153 sppp_rca_event(struct sppp *sp, void *xcp) 2154 { 2155 const struct cp *cp = xcp; 2156 STDDCL; 2157 2158 switch (sp->scp[cp->protoidx].state) { 2159 case STATE_CLOSED: 2160 case STATE_STOPPED: 2161 if ((cp->flags & CP_AUTH) == 0) { 2162 sppp_cp_send(sp, cp->proto, TERM_ACK, 2163 sp->scp[cp->protoidx].rconfid, 0, 0); 2164 } 2165 break; 2166 case STATE_CLOSING: 2167 case STATE_STOPPING: 2168 break; 2169 case STATE_REQ_SENT: 2170 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2171 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2172 break; 2173 case STATE_OPENED: 2174 (cp->tld)(sp); 2175 /* fall through */ 2176 case STATE_ACK_RCVD: 2177 (cp->scr)(sp); 2178 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2179 break; 2180 case STATE_ACK_SENT: 2181 sppp_cp_change_state(cp, sp, STATE_OPENED); 2182 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2183 if (debug) 2184 log(LOG_DEBUG, "%s: %s tlu\n", 2185 ifp->if_xname, cp->name); 2186 (cp->tlu)(sp); 2187 break; 2188 default: 2189 printf("%s: %s illegal RCA in state %s\n", 2190 ifp->if_xname, cp->name, 2191 sppp_state_name(sp->scp[cp->protoidx].state)); 2192 if_statinc(ifp, if_ierrors); 2193 } 2194 } 2195 2196 static void 2197 sppp_rcn_event(struct sppp *sp, void *xcp) 2198 { 2199 const struct cp *cp = xcp; 2200 struct ifnet *ifp = &sp->pp_if; 2201 2202 switch (sp->scp[cp->protoidx].state) { 2203 case STATE_CLOSED: 2204 case STATE_STOPPED: 2205 if ((cp->flags & CP_AUTH) == 0) { 2206 sppp_cp_send(sp, cp->proto, TERM_ACK, 2207 sp->scp[cp->protoidx].rconfid, 0, 0); 2208 } 2209 break; 2210 case STATE_REQ_SENT: 2211 case STATE_ACK_SENT: 2212 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2213 (cp->scr)(sp); 2214 break; 2215 case STATE_OPENED: 2216 (cp->tld)(sp); 2217 /* fall through */ 2218 case STATE_ACK_RCVD: 2219 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2220 (cp->scr)(sp); 2221 break; 2222 case STATE_CLOSING: 2223 case STATE_STOPPING: 2224 break; 2225 default: 2226 printf("%s: %s illegal RCN in state %s\n", 2227 ifp->if_xname, cp->name, 2228 sppp_state_name(sp->scp[cp->protoidx].state)); 2229 if_statinc(ifp, if_ierrors); 2230 } 2231 } 2232 2233 static void 2234 sppp_rtr_event(struct sppp *sp, void *xcp) 2235 { 2236 const struct cp *cp = xcp; 2237 STDDCL; 2238 2239 switch (sp->scp[cp->protoidx].state) { 2240 case STATE_ACK_RCVD: 2241 case STATE_ACK_SENT: 2242 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2243 break; 2244 case STATE_CLOSED: 2245 case STATE_STOPPED: 2246 case STATE_CLOSING: 2247 case STATE_STOPPING: 2248 case STATE_REQ_SENT: 2249 break; 2250 case STATE_OPENED: 2251 (cp->tld)(sp); 2252 sp->scp[cp->protoidx].rst_counter = 0; 2253 sppp_cp_change_state(cp, sp, STATE_STOPPING); 2254 break; 2255 default: 2256 printf("%s: %s illegal RTR in state %s\n", 2257 ifp->if_xname, cp->name, 2258 sppp_state_name(sp->scp[cp->protoidx].state)); 2259 if_statinc(ifp, if_ierrors); 2260 return; 2261 } 2262 2263 /* Send Terminate-Ack packet. */ 2264 if (debug) 2265 log(LOG_DEBUG, "%s: %s send terminate-ack\n", 2266 ifp->if_xname, cp->name); 2267 if ((cp->flags & CP_AUTH) == 0) { 2268 sppp_cp_send(sp, cp->proto, TERM_ACK, 2269 sp->scp[cp->protoidx].rseq, 0, 0); 2270 } 2271 } 2272 2273 static void 2274 sppp_rta_event(struct sppp *sp, void *xcp) 2275 { 2276 const struct cp *cp = xcp; 2277 struct ifnet *ifp = &sp->pp_if; 2278 2279 switch (sp->scp[cp->protoidx].state) { 2280 case STATE_CLOSED: 2281 case STATE_STOPPED: 2282 case STATE_REQ_SENT: 2283 case STATE_ACK_SENT: 2284 break; 2285 case STATE_CLOSING: 2286 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2287 (cp->tlf)(cp, sp); 2288 break; 2289 case STATE_STOPPING: 2290 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2291 (cp->tlf)(cp, sp); 2292 break; 2293 case STATE_ACK_RCVD: 2294 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2295 break; 2296 case STATE_OPENED: 2297 (cp->tld)(sp); 2298 (cp->scr)(sp); 2299 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2300 break; 2301 default: 2302 printf("%s: %s illegal RTA in state %s\n", 2303 ifp->if_xname, cp->name, 2304 sppp_state_name(sp->scp[cp->protoidx].state)); 2305 if_statinc(ifp, if_ierrors); 2306 } 2307 } 2308 2309 static void 2310 sppp_rxj_event(struct sppp *sp, void *xcp) 2311 { 2312 const struct cp *cp = xcp; 2313 struct ifnet *ifp = &sp->pp_if; 2314 2315 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 2316 switch (sp->scp[cp->protoidx].state) { 2317 case STATE_CLOSED: 2318 case STATE_STOPPED: 2319 case STATE_REQ_SENT: 2320 case STATE_ACK_SENT: 2321 case STATE_CLOSING: 2322 case STATE_STOPPING: 2323 case STATE_OPENED: 2324 break; 2325 case STATE_ACK_RCVD: 2326 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2327 break; 2328 default: 2329 printf("%s: %s illegal RXJ- in state %s\n", 2330 ifp->if_xname, cp->name, 2331 sppp_state_name(sp->scp[cp->protoidx].state)); 2332 if_statinc(ifp, if_ierrors); 2333 } 2334 } 2335 2336 /* 2337 * Change the state of a control protocol in the state automaton. 2338 * Takes care of starting/stopping the restart timer. 2339 */ 2340 void 2341 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 2342 { 2343 2344 KASSERT(SPPP_WLOCKED(sp)); 2345 2346 sp->scp[cp->protoidx].state = newstate; 2347 callout_stop(&sp->scp[cp->protoidx].ch); 2348 switch (newstate) { 2349 case STATE_INITIAL: 2350 case STATE_STARTING: 2351 case STATE_CLOSED: 2352 case STATE_STOPPED: 2353 case STATE_OPENED: 2354 break; 2355 case STATE_CLOSING: 2356 case STATE_STOPPING: 2357 case STATE_REQ_SENT: 2358 case STATE_ACK_RCVD: 2359 case STATE_ACK_SENT: 2360 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2361 break; 2362 } 2363 } 2364 2365 /* 2366 *--------------------------------------------------------------------------* 2367 * * 2368 * The LCP implementation. * 2369 * * 2370 *--------------------------------------------------------------------------* 2371 */ 2372 static void 2373 sppp_lcp_init(struct sppp *sp) 2374 { 2375 2376 KASSERT(SPPP_WLOCKED(sp)); 2377 2378 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 2379 sp->lcp.magic = 0; 2380 sp->scp[IDX_LCP].state = STATE_INITIAL; 2381 sp->scp[IDX_LCP].fail_counter = 0; 2382 sp->scp[IDX_LCP].seq = 0; 2383 sp->scp[IDX_LCP].rseq = 0; 2384 sp->lcp.protos = 0; 2385 2386 /* 2387 * Initialize counters and timeout values. Note that we don't 2388 * use the 3 seconds suggested in RFC 1661 since we are likely 2389 * running on a fast link. XXX We should probably implement 2390 * the exponential backoff option. Note that these values are 2391 * relevant for all control protocols, not just LCP only. 2392 */ 2393 sp->lcp.timeout = 1 * hz; 2394 sp->lcp.max_terminate = 2; 2395 sp->lcp.max_configure = 10; 2396 sp->lcp.max_failure = 10; 2397 sppp_cp_init(&lcp, sp); 2398 } 2399 2400 static void 2401 sppp_lcp_up(struct sppp *sp, void *xcp) 2402 { 2403 const struct cp *cp = xcp; 2404 int pidx; 2405 STDDCL; 2406 2407 KASSERT(SPPP_WLOCKED(sp)); 2408 2409 pidx = cp->protoidx; 2410 /* Initialize activity timestamp: opening a connection is an activity */ 2411 sp->pp_last_receive = sp->pp_last_activity = time_uptime; 2412 2413 /* 2414 * If this interface is passive or dial-on-demand, and we are 2415 * still in Initial state, it means we've got an incoming 2416 * call. Activate the interface. 2417 */ 2418 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2419 if (debug) 2420 log(LOG_DEBUG, 2421 "%s: Up event", ifp->if_xname); 2422 ifp->if_flags |= IFF_RUNNING; 2423 if (sp->scp[pidx].state == STATE_INITIAL) { 2424 if (debug) 2425 addlog("(incoming call)\n"); 2426 sp->pp_flags |= PP_CALLIN; 2427 sppp_wq_add(sp->wq_cp, &sp->scp[pidx].work_open); 2428 } else if (debug) 2429 addlog("\n"); 2430 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && 2431 (sp->scp[IDX_LCP].state == STATE_INITIAL)) { 2432 ifp->if_flags |= IFF_RUNNING; 2433 sppp_wq_add(sp->wq_cp, &sp->scp[pidx].work_open); 2434 } 2435 2436 sppp_up_event(sp, xcp); 2437 } 2438 2439 static void 2440 sppp_lcp_down(struct sppp *sp, void *xcp) 2441 { 2442 const struct cp *cp = xcp; 2443 int pidx; 2444 STDDCL; 2445 2446 KASSERT(SPPP_WLOCKED(sp)); 2447 2448 pidx = cp->protoidx; 2449 sppp_down_event(sp, xcp); 2450 2451 /* 2452 * If this is neither a dial-on-demand nor a passive 2453 * interface, simulate an ``ifconfig down'' action, so the 2454 * administrator can force a redial by another ``ifconfig 2455 * up''. XXX For leased line operation, should we immediately 2456 * try to reopen the connection here? 2457 */ 2458 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2459 if (debug) 2460 log(LOG_INFO, 2461 "%s: Down event (carrier loss), taking interface down.\n", 2462 ifp->if_xname); 2463 SPPP_UNLOCK(sp); 2464 if_down(ifp); 2465 SPPP_LOCK(sp, RW_WRITER); 2466 2467 if (sp->lcp.reestablish) 2468 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 2469 } else { 2470 if (debug) 2471 log(LOG_DEBUG, 2472 "%s: Down event (carrier loss)\n", 2473 ifp->if_xname); 2474 } 2475 sp->scp[pidx].fail_counter = 0; 2476 sp->pp_flags &= ~PP_CALLIN; 2477 if (sp->scp[pidx].state != STATE_INITIAL) 2478 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 2479 ifp->if_flags &= ~IFF_RUNNING; 2480 } 2481 2482 static void 2483 sppp_lcp_open(struct sppp *sp, void *xcp) 2484 { 2485 2486 KASSERT(SPPP_WLOCKED(sp)); 2487 2488 sp->lcp.reestablish = false; 2489 2490 if (sp->pp_if.if_mtu < PP_MTU) { 2491 sp->lcp.mru = sp->pp_if.if_mtu; 2492 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2493 } else 2494 sp->lcp.mru = PP_MTU; 2495 sp->lcp.their_mru = PP_MTU; 2496 2497 /* 2498 * If we are authenticator, negotiate LCP_AUTH 2499 */ 2500 if (sp->hisauth.proto != 0) 2501 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2502 else 2503 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2504 sp->pp_flags &= ~PP_NEEDAUTH; 2505 sppp_open_event(sp, xcp); 2506 } 2507 2508 /* 2509 * Analyze a configure request. Return true if it was agreeable, and 2510 * caused action sca, false if it has been rejected or nak'ed, and 2511 * caused action scn. (The return value is used to make the state 2512 * transition decision in the state automaton.) 2513 */ 2514 static int 2515 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int origlen) 2516 { 2517 STDDCL; 2518 u_char *buf, *r, *p, l, blen, type; 2519 int len, rlen; 2520 uint32_t nmagic; 2521 u_short authproto; 2522 2523 KASSERT(SPPP_WLOCKED(sp)); 2524 2525 if (origlen < sizeof(*h)) 2526 return 0; 2527 2528 origlen -= sizeof(*h); 2529 type = 0; 2530 2531 if (origlen <= 0) 2532 return 0; 2533 else 2534 blen = origlen; 2535 2536 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 2537 if (buf == NULL) 2538 return 0; 2539 2540 if (debug) 2541 log(LOG_DEBUG, "%s: lcp parse opts:", 2542 ifp->if_xname); 2543 2544 /* pass 1: check for things that need to be rejected */ 2545 p = (void *)(h + 1); 2546 r = buf; 2547 rlen = 0; 2548 for (len = origlen; len > 1; len-= l, p += l) { 2549 l = p[1]; 2550 if (l == 0) 2551 break; 2552 2553 /* Sanity check option length */ 2554 if (l > len) { 2555 /* 2556 * Malicious option - drop immediately. 2557 * XXX Maybe we should just RXJ it? 2558 */ 2559 addlog("%s: received malicious LCP option 0x%02x, " 2560 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp->if_xname, 2561 p[0], l, len); 2562 rlen = -1; 2563 goto end; 2564 } 2565 if (debug) 2566 addlog(" %s", sppp_lcp_opt_name(*p)); 2567 switch (p[0]) { 2568 case LCP_OPT_MAGIC: 2569 /* Magic number. */ 2570 /* fall through, both are same length */ 2571 case LCP_OPT_ASYNC_MAP: 2572 /* Async control character map. */ 2573 if (len >= 6 || l == 6) 2574 continue; 2575 if (debug) 2576 addlog(" [invalid]"); 2577 break; 2578 case LCP_OPT_MP_EID: 2579 if (len >= l && l >= 3) { 2580 switch (p[2]) { 2581 case 0: if (l==3+ 0) continue;break; 2582 case 2: if (l==3+ 4) continue;break; 2583 case 3: if (l==3+ 6) continue;break; 2584 case 6: if (l==3+16) continue;break; 2585 case 1: /* FALLTHROUGH */ 2586 case 4: if (l<=3+20) continue;break; 2587 case 5: if (l<=3+15) continue;break; 2588 /* XXX should it be default: continue;? */ 2589 } 2590 } 2591 if (debug) 2592 addlog(" [invalid class %d len %d]", p[2], l); 2593 break; 2594 case LCP_OPT_MP_SSNHF: 2595 if (len >= 2 && l == 2) { 2596 if (debug) 2597 addlog(" [rej]"); 2598 break; 2599 } 2600 if (debug) 2601 addlog(" [invalid]"); 2602 break; 2603 case LCP_OPT_MP_MRRU: 2604 /* Multilink maximum received reconstructed unit */ 2605 /* should be fall through, both are same length */ 2606 /* FALLTHROUGH */ 2607 case LCP_OPT_MRU: 2608 /* Maximum receive unit. */ 2609 if (len >= 4 && l == 4) 2610 continue; 2611 if (debug) 2612 addlog(" [invalid]"); 2613 break; 2614 case LCP_OPT_AUTH_PROTO: 2615 if (len < 4) { 2616 if (debug) 2617 addlog(" [invalid]"); 2618 break; 2619 } 2620 authproto = (p[2] << 8) + p[3]; 2621 if (authproto == PPP_CHAP && l != 5) { 2622 if (debug) 2623 addlog(" [invalid chap len]"); 2624 break; 2625 } 2626 if (sp->myauth.proto == 0) { 2627 /* we are not configured to do auth */ 2628 if (debug) 2629 addlog(" [not configured]"); 2630 break; 2631 } 2632 /* 2633 * Remote want us to authenticate, remember this, 2634 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2635 * up. 2636 */ 2637 sp->pp_flags |= PP_NEEDAUTH; 2638 continue; 2639 default: 2640 /* Others not supported. */ 2641 if (debug) 2642 addlog(" [rej]"); 2643 break; 2644 } 2645 if (rlen + l > blen) { 2646 if (debug) 2647 addlog(" [overflow]"); 2648 continue; 2649 } 2650 /* Add the option to rejected list. */ 2651 memcpy(r, p, l); 2652 r += l; 2653 rlen += l; 2654 } 2655 2656 if (rlen > 0) { 2657 type = CONF_REJ; 2658 goto end; 2659 } 2660 2661 if (debug) 2662 addlog("\n"); 2663 2664 /* 2665 * pass 2: check for option values that are unacceptable and 2666 * thus require to be nak'ed. 2667 */ 2668 if (debug) 2669 log(LOG_DEBUG, "%s: lcp parse opt values: ", 2670 ifp->if_xname); 2671 2672 p = (void *)(h + 1); 2673 r = buf; 2674 rlen = 0; 2675 for (len = origlen; len > 0; len -= l, p += l) { 2676 l = p[1]; 2677 if (l == 0) 2678 break; 2679 2680 if (debug) 2681 addlog(" %s", sppp_lcp_opt_name(*p)); 2682 switch (p[0]) { 2683 case LCP_OPT_MAGIC: 2684 /* Magic number -- extract. */ 2685 nmagic = (uint32_t)p[2] << 24 | 2686 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2687 if (nmagic != sp->lcp.magic) { 2688 if (debug) 2689 addlog(" 0x%x", nmagic); 2690 continue; 2691 } 2692 /* 2693 * Local and remote magics equal -- loopback? 2694 */ 2695 if (sp->pp_loopcnt >= LOOPALIVECNT*5) { 2696 printf ("%s: loopback\n", 2697 ifp->if_xname); 2698 sp->pp_loopcnt = 0; 2699 if (ifp->if_flags & IFF_UP) { 2700 SPPP_UNLOCK(sp); 2701 if_down(ifp); 2702 SPPP_LOCK(sp, RW_WRITER); 2703 2704 IF_PURGE(&sp->pp_cpq); 2705 /* XXX ? */ 2706 sppp_wq_add(sp->wq_cp, 2707 &sp->scp[IDX_LCP].work_down); 2708 sppp_wq_add(sp->wq_cp, 2709 &sp->scp[IDX_LCP].work_up); 2710 } 2711 } else if (debug) 2712 addlog(" [glitch]"); 2713 ++sp->pp_loopcnt; 2714 /* 2715 * We negate our magic here, and NAK it. If 2716 * we see it later in an NAK packet, we 2717 * suggest a new one. 2718 */ 2719 nmagic = ~sp->lcp.magic; 2720 /* Gonna NAK it. */ 2721 p[2] = nmagic >> 24; 2722 p[3] = nmagic >> 16; 2723 p[4] = nmagic >> 8; 2724 p[5] = nmagic; 2725 break; 2726 2727 case LCP_OPT_ASYNC_MAP: 2728 /* 2729 * Async control character map -- just ignore it. 2730 * 2731 * Quote from RFC 1662, chapter 6: 2732 * To enable this functionality, synchronous PPP 2733 * implementations MUST always respond to the 2734 * Async-Control-Character-Map Configuration 2735 * Option with the LCP Configure-Ack. However, 2736 * acceptance of the Configuration Option does 2737 * not imply that the synchronous implementation 2738 * will do any ACCM mapping. Instead, all such 2739 * octet mapping will be performed by the 2740 * asynchronous-to-synchronous converter. 2741 */ 2742 continue; 2743 2744 case LCP_OPT_MRU: 2745 /* 2746 * Maximum receive unit. Always agreeable, 2747 * but ignored by now. 2748 */ 2749 sp->lcp.their_mru = p[2] * 256 + p[3]; 2750 if (debug) 2751 addlog(" %ld", sp->lcp.their_mru); 2752 continue; 2753 2754 case LCP_OPT_AUTH_PROTO: 2755 authproto = (p[2] << 8) + p[3]; 2756 if (sp->myauth.proto != authproto) { 2757 /* not agreed, nak */ 2758 if (debug) 2759 addlog(" [mine %s != his %s]", 2760 sppp_proto_name(sp->myauth.proto), 2761 sppp_proto_name(authproto)); 2762 p[2] = sp->myauth.proto >> 8; 2763 p[3] = sp->myauth.proto; 2764 break; 2765 } 2766 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2767 if (debug) 2768 addlog(" [chap not MD5]"); 2769 p[4] = CHAP_MD5; 2770 break; 2771 } 2772 continue; 2773 case LCP_OPT_MP_EID: 2774 /* 2775 * Endpoint identification. 2776 * Always agreeable, 2777 * but ignored by now. 2778 */ 2779 if (debug) { 2780 addlog(" type %d", p[2]); 2781 sppp_print_bytes(p+3, p[1]-3); 2782 } 2783 continue; 2784 case LCP_OPT_MP_MRRU: 2785 /* 2786 * Maximum received reconstructed unit. 2787 * Always agreeable, 2788 * but ignored by now. 2789 */ 2790 sp->lcp.their_mrru = p[2] * 256 + p[3]; 2791 if (debug) 2792 addlog(" %ld", sp->lcp.their_mrru); 2793 continue; 2794 } 2795 if (rlen + l > blen) { 2796 if (debug) 2797 addlog(" [overflow]"); 2798 continue; 2799 } 2800 /* Add the option to nak'ed list. */ 2801 memcpy(r, p, l); 2802 r += l; 2803 rlen += l; 2804 } 2805 2806 if (rlen > 0) { 2807 if (++sp->scp[IDX_LCP].fail_counter >= sp->lcp.max_failure) { 2808 if (debug) 2809 addlog(" max_failure (%d) exceeded, ", 2810 sp->lcp.max_failure); 2811 type = CONF_REJ; 2812 } else { 2813 type = CONF_NAK; 2814 } 2815 } else { 2816 type = CONF_ACK; 2817 rlen = origlen; 2818 memcpy(r, h + 1, rlen); 2819 sp->scp[IDX_LCP].fail_counter = 0; 2820 sp->pp_loopcnt = 0; 2821 } 2822 2823 end: 2824 if (debug) 2825 addlog("\n"); 2826 2827 if (sp->scp[IDX_LCP].rcr_buf != NULL) { 2828 kmem_intr_free(sp->scp[IDX_LCP].rcr_buf, 2829 sp->scp[IDX_LCP].rcr_blen); 2830 } 2831 2832 if (rlen < 0) { 2833 kmem_intr_free(buf, blen); 2834 sp->scp[IDX_IPCP].rcr_buf = NULL; 2835 sp->scp[IDX_IPCP].rcr_rlen = 0; 2836 return -1; 2837 } 2838 2839 sp->scp[IDX_LCP].rcr_type = type; 2840 sp->scp[IDX_LCP].rcr_buf = buf; 2841 sp->scp[IDX_LCP].rcr_blen = blen; 2842 sp->scp[IDX_LCP].rcr_rlen = rlen; 2843 2844 if (type != CONF_ACK) 2845 return 0; 2846 return 1; 2847 } 2848 2849 /* 2850 * Analyze the LCP Configure-Reject option list, and adjust our 2851 * negotiation. 2852 */ 2853 static void 2854 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2855 { 2856 STDDCL; 2857 u_char *p, l; 2858 2859 KASSERT(SPPP_WLOCKED(sp)); 2860 2861 if (len <= sizeof(*h)) 2862 return; 2863 2864 len -= sizeof(*h); 2865 2866 if (debug) 2867 log(LOG_DEBUG, "%s: lcp rej opts:", 2868 ifp->if_xname); 2869 2870 p = (void *)(h + 1); 2871 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2872 /* Sanity check option length */ 2873 if (l > len) { 2874 /* 2875 * Malicious option - drop immediately. 2876 * XXX Maybe we should just RXJ it? 2877 */ 2878 addlog("%s: received malicious LCP option, " 2879 "dropping.\n", ifp->if_xname); 2880 goto end; 2881 } 2882 if (debug) 2883 addlog(" %s", sppp_lcp_opt_name(*p)); 2884 switch (p[0]) { 2885 case LCP_OPT_MAGIC: 2886 /* Magic number -- can't use it, use 0 */ 2887 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2888 sp->lcp.magic = 0; 2889 break; 2890 case LCP_OPT_MRU: 2891 /* 2892 * We try to negotiate a lower MRU if the underlying 2893 * link's MTU is less than PP_MTU (e.g. PPPoE). If the 2894 * peer rejects this lower rate, fallback to the 2895 * default. 2896 */ 2897 if (debug) { 2898 addlog("%s: warning: peer rejected our MRU of " 2899 "%ld bytes. Defaulting to %d bytes\n", 2900 ifp->if_xname, sp->lcp.mru, PP_MTU); 2901 } 2902 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2903 sp->lcp.mru = PP_MTU; 2904 break; 2905 case LCP_OPT_AUTH_PROTO: 2906 /* 2907 * Peer doesn't want to authenticate himself, 2908 * deny unless this is a dialout call, and 2909 * SPPP_AUTHFLAG_NOCALLOUT is set. 2910 */ 2911 if ((sp->pp_flags & PP_CALLIN) == 0 && 2912 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2913 if (debug) 2914 addlog(" [don't insist on auth " 2915 "for callout]"); 2916 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2917 break; 2918 } 2919 if (debug) 2920 addlog("[access denied]\n"); 2921 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 2922 break; 2923 } 2924 } 2925 if (debug) 2926 addlog("\n"); 2927 end: 2928 return; 2929 } 2930 2931 /* 2932 * Analyze the LCP Configure-NAK option list, and adjust our 2933 * negotiation. 2934 */ 2935 static void 2936 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2937 { 2938 STDDCL; 2939 u_char *p, l; 2940 uint32_t magic; 2941 2942 KASSERT(SPPP_WLOCKED(sp)); 2943 2944 if (len <= sizeof(*h)) 2945 return; 2946 len -= sizeof(*h); 2947 2948 if (debug) 2949 log(LOG_DEBUG, "%s: lcp nak opts:", 2950 ifp->if_xname); 2951 2952 p = (void *)(h + 1); 2953 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2954 /* Sanity check option length */ 2955 if (l > len) { 2956 /* 2957 * Malicious option - drop immediately. 2958 * XXX Maybe we should just RXJ it? 2959 */ 2960 addlog("%s: received malicious LCP option, " 2961 "dropping.\n", ifp->if_xname); 2962 goto end; 2963 } 2964 if (debug) 2965 addlog(" %s", sppp_lcp_opt_name(*p)); 2966 switch (p[0]) { 2967 case LCP_OPT_MAGIC: 2968 /* Magic number -- renegotiate */ 2969 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2970 len >= 6 && l == 6) { 2971 magic = (uint32_t)p[2] << 24 | 2972 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2973 /* 2974 * If the remote magic is our negated one, 2975 * this looks like a loopback problem. 2976 * Suggest a new magic to make sure. 2977 */ 2978 if (magic == ~sp->lcp.magic) { 2979 if (debug) 2980 addlog(" magic glitch"); 2981 sp->lcp.magic = cprng_fast32(); 2982 } else { 2983 sp->lcp.magic = magic; 2984 if (debug) 2985 addlog(" %d", magic); 2986 } 2987 } 2988 break; 2989 case LCP_OPT_MRU: 2990 /* 2991 * Peer wants to advise us to negotiate an MRU. 2992 * Agree on it if it's reasonable, or use 2993 * default otherwise. 2994 */ 2995 if (len >= 4 && l == 4) { 2996 u_int mru = p[2] * 256 + p[3]; 2997 if (debug) 2998 addlog(" %d", mru); 2999 if (mru < PPP_MINMRU || mru > sp->pp_if.if_mtu) 3000 mru = sp->pp_if.if_mtu; 3001 sp->lcp.mru = mru; 3002 sp->lcp.opts |= (1 << LCP_OPT_MRU); 3003 } 3004 break; 3005 case LCP_OPT_AUTH_PROTO: 3006 /* 3007 * Peer doesn't like our authentication method, 3008 * deny. 3009 */ 3010 if (debug) 3011 addlog("[access denied]\n"); 3012 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3013 break; 3014 } 3015 } 3016 if (debug) 3017 addlog("\n"); 3018 end: 3019 return; 3020 } 3021 3022 static void 3023 sppp_lcp_tlu(struct sppp *sp) 3024 { 3025 struct ifnet *ifp = &sp->pp_if; 3026 int i; 3027 3028 KASSERT(SPPP_WLOCKED(sp)); 3029 3030 /* XXX ? */ 3031 if (! (ifp->if_flags & IFF_UP) && 3032 (ifp->if_flags & IFF_RUNNING)) { 3033 /* Coming out of loopback mode. */ 3034 SPPP_UNLOCK(sp); 3035 if_up(ifp); 3036 SPPP_LOCK(sp, RW_WRITER); 3037 } 3038 3039 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 3040 (sp->pp_flags & PP_NEEDAUTH) != 0) 3041 sppp_change_phase(sp, SPPP_PHASE_AUTHENTICATE); 3042 else 3043 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 3044 3045 /* 3046 * Open all authentication protocols. This is even required 3047 * if we already proceeded to network phase, since it might be 3048 * that remote wants us to authenticate, so we might have to 3049 * send a PAP request. Undesired authentication protocols 3050 * don't do anything when they get an Open event. 3051 */ 3052 for (i = 0; i < IDX_COUNT; i++) 3053 if ((cps[i])->flags & CP_AUTH) { 3054 sppp_wq_add(sp->wq_cp, 3055 &sp->scp[(cps[i])->protoidx].work_open); 3056 } 3057 3058 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 3059 /* Notify all NCPs. */ 3060 for (i = 0; i < IDX_COUNT; i++) 3061 if ((cps[i])->flags & CP_NCP) { 3062 sppp_wq_add(sp->wq_cp, 3063 &sp->scp[(cps[i])->protoidx].work_open); 3064 } 3065 } 3066 3067 /* notify low-level driver of state change */ 3068 sppp_notify_chg_wlocked(sp); 3069 } 3070 3071 static void 3072 sppp_lcp_tld(struct sppp *sp) 3073 { 3074 int i, pi, phase; 3075 3076 KASSERT(SPPP_WLOCKED(sp)); 3077 3078 phase = sp->pp_phase; 3079 3080 sppp_change_phase(sp, SPPP_PHASE_TERMINATE); 3081 3082 /* 3083 * Take upper layers down. We send the Down event first and 3084 * the Close second to prevent the upper layers from sending 3085 * ``a flurry of terminate-request packets'', as the RFC 3086 * describes it. 3087 */ 3088 for (i = 0; i < IDX_COUNT; i++) { 3089 pi = (cps[i])->protoidx; 3090 if (((cps[i])->flags & CP_LCP) == 0) { 3091 /* skip if ncp was not started */ 3092 if (phase != SPPP_PHASE_NETWORK && 3093 ((cps[i])->flags & CP_NCP) != 0) 3094 continue; 3095 3096 sppp_wq_add(sp->wq_cp, &sp->scp[pi].work_down); 3097 sppp_wq_add(sp->wq_cp, &sp->scp[pi].work_close); 3098 } 3099 } 3100 } 3101 3102 static void 3103 sppp_lcp_tls(const struct cp *cp __unused, struct sppp *sp) 3104 { 3105 3106 KASSERT(SPPP_WLOCKED(sp)); 3107 3108 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 3109 printf("%s: authentication failed %d times, not retrying again\n", 3110 sp->pp_if.if_xname, sp->pp_auth_failures); 3111 3112 SPPP_UNLOCK(sp); 3113 if_down(&sp->pp_if); 3114 SPPP_LOCK(sp, RW_WRITER); 3115 return; 3116 } 3117 3118 sppp_change_phase(sp, SPPP_PHASE_ESTABLISH); 3119 3120 /* Notify lower layer if desired. */ 3121 sppp_notify_tls_wlocked(sp); 3122 } 3123 3124 static void 3125 sppp_lcp_tlf(const struct cp *cp __unused, struct sppp *sp) 3126 { 3127 3128 KASSERT(SPPP_WLOCKED(sp)); 3129 3130 sppp_change_phase(sp, SPPP_PHASE_DEAD); 3131 3132 /* Notify lower layer if desired. */ 3133 sppp_notify_tlf_wlocked(sp); 3134 } 3135 3136 static void 3137 sppp_lcp_scr(struct sppp *sp) 3138 { 3139 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 3140 int i = 0; 3141 u_short authproto; 3142 3143 KASSERT(SPPP_WLOCKED(sp)); 3144 3145 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 3146 if (! sp->lcp.magic) 3147 sp->lcp.magic = cprng_fast32(); 3148 opt[i++] = LCP_OPT_MAGIC; 3149 opt[i++] = 6; 3150 opt[i++] = sp->lcp.magic >> 24; 3151 opt[i++] = sp->lcp.magic >> 16; 3152 opt[i++] = sp->lcp.magic >> 8; 3153 opt[i++] = sp->lcp.magic; 3154 } 3155 3156 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 3157 opt[i++] = LCP_OPT_MRU; 3158 opt[i++] = 4; 3159 opt[i++] = sp->lcp.mru >> 8; 3160 opt[i++] = sp->lcp.mru; 3161 } 3162 3163 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 3164 authproto = sp->hisauth.proto; 3165 opt[i++] = LCP_OPT_AUTH_PROTO; 3166 opt[i++] = authproto == PPP_CHAP? 5: 4; 3167 opt[i++] = authproto >> 8; 3168 opt[i++] = authproto; 3169 if (authproto == PPP_CHAP) 3170 opt[i++] = CHAP_MD5; 3171 } 3172 3173 sp->scp[IDX_LCP].confid = ++sp->scp[IDX_LCP].seq; 3174 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->scp[IDX_LCP].confid, i, &opt); 3175 } 3176 3177 /* 3178 * Check the open NCPs, return true if at least one NCP is open. 3179 */ 3180 3181 static int 3182 sppp_cp_check(struct sppp *sp, u_char cp_flags) 3183 { 3184 int i, mask; 3185 3186 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 3187 if ((sp->lcp.protos & mask) && (cps[i])->flags & cp_flags) 3188 return 1; 3189 return 0; 3190 } 3191 3192 /* 3193 * Re-check the open NCPs and see if we should terminate the link. 3194 * Called by the NCPs during their tlf action handling. 3195 */ 3196 static void 3197 sppp_lcp_check_and_close(struct sppp *sp) 3198 { 3199 3200 KASSERT(SPPP_WLOCKED(sp)); 3201 3202 if (sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 3203 /* don't bother, we are already going down */ 3204 return; 3205 } 3206 3207 if (sp->pp_phase == SPPP_PHASE_AUTHENTICATE && 3208 sppp_cp_check(sp, CP_AUTH)) 3209 return; 3210 3211 if (sp->pp_phase >= SPPP_PHASE_NETWORK && 3212 sppp_cp_check(sp, CP_NCP)) 3213 return; 3214 3215 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3216 } 3217 3218 /* 3219 *--------------------------------------------------------------------------* 3220 * * 3221 * The IPCP implementation. * 3222 * * 3223 *--------------------------------------------------------------------------* 3224 */ 3225 3226 static void 3227 sppp_ipcp_init(struct sppp *sp) 3228 { 3229 int error; 3230 3231 KASSERT(SPPP_WLOCKED(sp)); 3232 3233 sp->ipcp.opts = 0; 3234 sp->ipcp.flags = 0; 3235 sp->scp[IDX_IPCP].state = STATE_INITIAL; 3236 sp->scp[IDX_IPCP].fail_counter = 0; 3237 sp->scp[IDX_IPCP].seq = 0; 3238 sp->scp[IDX_IPCP].rseq = 0; 3239 sppp_cp_init(&ipcp, sp); 3240 3241 error = workqueue_create(&sp->ipcp.update_addrs_wq, "ipcp_addr", 3242 sppp_update_ip_addrs_work, sp, PRI_SOFTNET, IPL_NET, 0); 3243 if (error) 3244 panic("%s: update_addrs workqueue_create failed (%d)\n", 3245 __func__, error); 3246 sp->ipcp.update_addrs_q = pcq_create(IPCP_UPDATE_LIMIT, KM_SLEEP); 3247 3248 sp->ipcp.update_addrs_enqueued = 0; 3249 } 3250 3251 static void 3252 sppp_ipcp_open(struct sppp *sp, void *xcp) 3253 { 3254 STDDCL; 3255 uint32_t myaddr, hisaddr; 3256 3257 KASSERT(SPPP_WLOCKED(sp)); 3258 3259 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 3260 sp->ipcp.req_myaddr = 0; 3261 sp->ipcp.req_hisaddr = 0; 3262 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 3263 3264 #ifdef INET 3265 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3266 #else 3267 myaddr = hisaddr = 0; 3268 #endif 3269 /* 3270 * If we don't have his address, this probably means our 3271 * interface doesn't want to talk IP at all. (This could 3272 * be the case if somebody wants to speak only IPX, for 3273 * example.) Don't open IPCP in this case. 3274 */ 3275 if (hisaddr == 0) { 3276 /* XXX this message should go away */ 3277 if (debug) 3278 log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n", 3279 ifp->if_xname); 3280 return; 3281 } 3282 3283 if (myaddr == 0) { 3284 /* 3285 * I don't have an assigned address, so i need to 3286 * negotiate my address. 3287 */ 3288 sp->ipcp.flags |= IPCP_MYADDR_DYN; 3289 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3290 } 3291 if (hisaddr == 1) { 3292 /* 3293 * XXX - remove this hack! 3294 * remote has no valid address, we need to get one assigned. 3295 */ 3296 sp->ipcp.flags |= IPCP_HISADDR_DYN; 3297 } 3298 sppp_open_event(sp, xcp); 3299 } 3300 3301 static void 3302 sppp_ipcp_close(struct sppp *sp, void *xcp) 3303 { 3304 3305 KASSERT(SPPP_WLOCKED(sp)); 3306 3307 sppp_close_event(sp, xcp); 3308 3309 #ifdef INET 3310 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 3311 /* 3312 * Some address was dynamic, clear it again. 3313 */ 3314 sppp_clear_ip_addrs(sp); 3315 #endif 3316 } 3317 3318 /* 3319 * Analyze a configure request. Return true if it was agreeable, and 3320 * caused action sca, false if it has been rejected or nak'ed, and 3321 * caused action scn. (The return value is used to make the state 3322 * transition decision in the state automaton.) 3323 */ 3324 static int 3325 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int origlen) 3326 { 3327 u_char *buf, *r, *p, l, blen, type; 3328 struct ifnet *ifp = &sp->pp_if; 3329 int rlen, len, debug = ifp->if_flags & IFF_DEBUG; 3330 uint32_t hisaddr, desiredaddr; 3331 3332 KASSERT(SPPP_WLOCKED(sp)); 3333 3334 if (origlen < sizeof(*h)) 3335 return 0; 3336 3337 origlen -= sizeof(*h); 3338 type = 0; 3339 3340 /* 3341 * Make sure to allocate a buf that can at least hold a 3342 * conf-nak with an `address' option. We might need it below. 3343 */ 3344 blen = MAX(6, origlen); 3345 3346 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 3347 if (buf == NULL) 3348 return 0; 3349 3350 /* pass 1: see if we can recognize them */ 3351 if (debug) 3352 log(LOG_DEBUG, "%s: ipcp parse opts:", 3353 ifp->if_xname); 3354 p = (void *)(h + 1); 3355 r = buf; 3356 rlen = 0; 3357 for (len = origlen; len > 1; len -= l, p += l) { 3358 l = p[1]; 3359 if (l == 0) 3360 break; 3361 3362 /* Sanity check option length */ 3363 if (l > len) { 3364 /* XXX should we just RXJ? */ 3365 addlog("%s: malicious IPCP option received, dropping\n", 3366 ifp->if_xname); 3367 rlen = -1; 3368 goto end; 3369 } 3370 if (debug) 3371 addlog(" %s", sppp_ipcp_opt_name(*p)); 3372 switch (p[0]) { 3373 #ifdef notyet 3374 case IPCP_OPT_COMPRESSION: 3375 if (len >= 6 && l >= 6) { 3376 /* correctly formed compress option */ 3377 continue; 3378 } 3379 if (debug) 3380 addlog(" [invalid]"); 3381 break; 3382 #endif 3383 case IPCP_OPT_ADDRESS: 3384 if (len >= 6 && l == 6) { 3385 /* correctly formed address option */ 3386 continue; 3387 } 3388 if (debug) 3389 addlog(" [invalid]"); 3390 break; 3391 default: 3392 /* Others not supported. */ 3393 if (debug) 3394 addlog(" [rej]"); 3395 break; 3396 } 3397 /* Add the option to rejected list. */ 3398 if (rlen + l > blen) { 3399 if (debug) 3400 addlog(" [overflow]"); 3401 continue; 3402 } 3403 memcpy(r, p, l); 3404 r += l; 3405 rlen += l; 3406 } 3407 3408 if (rlen > 0) { 3409 type = CONF_REJ; 3410 goto end; 3411 } 3412 3413 if (debug) 3414 addlog("\n"); 3415 3416 /* pass 2: parse option values */ 3417 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 3418 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 3419 else 3420 #ifdef INET 3421 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 3422 #else 3423 hisaddr = 0; 3424 #endif 3425 if (debug) 3426 log(LOG_DEBUG, "%s: ipcp parse opt values: ", 3427 ifp->if_xname); 3428 p = (void *)(h + 1); 3429 r = buf; 3430 rlen = 0; 3431 for (len = origlen; len > 1; len -= l, p += l) { 3432 l = p[1]; 3433 if (l == 0) 3434 break; 3435 3436 if (debug) 3437 addlog(" %s", sppp_ipcp_opt_name(*p)); 3438 switch (p[0]) { 3439 #ifdef notyet 3440 case IPCP_OPT_COMPRESSION: 3441 continue; 3442 #endif 3443 case IPCP_OPT_ADDRESS: 3444 desiredaddr = p[2] << 24 | p[3] << 16 | 3445 p[4] << 8 | p[5]; 3446 if (desiredaddr == hisaddr || 3447 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 3448 /* 3449 * Peer's address is same as our value, 3450 * this is agreeable. Gonna conf-ack 3451 * it. 3452 */ 3453 if (debug) 3454 addlog(" %s [ack]", 3455 sppp_dotted_quad(hisaddr)); 3456 /* record that we've seen it already */ 3457 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 3458 sp->ipcp.req_hisaddr = desiredaddr; 3459 hisaddr = desiredaddr; 3460 continue; 3461 } 3462 /* 3463 * The address wasn't agreeable. This is either 3464 * he sent us 0.0.0.0, asking to assign him an 3465 * address, or he send us another address not 3466 * matching our value. Either case, we gonna 3467 * conf-nak it with our value. 3468 */ 3469 if (debug) { 3470 if (desiredaddr == 0) 3471 addlog(" [addr requested]"); 3472 else 3473 addlog(" %s [not agreed]", 3474 sppp_dotted_quad(desiredaddr)); 3475 } 3476 3477 p[2] = hisaddr >> 24; 3478 p[3] = hisaddr >> 16; 3479 p[4] = hisaddr >> 8; 3480 p[5] = hisaddr; 3481 break; 3482 } 3483 if (rlen + l > blen) { 3484 if (debug) 3485 addlog(" [overflow]"); 3486 continue; 3487 } 3488 /* Add the option to nak'ed list. */ 3489 memcpy(r, p, l); 3490 r += l; 3491 rlen += l; 3492 } 3493 3494 if (rlen > 0) { 3495 type = CONF_NAK; 3496 } else { 3497 if ((sp->ipcp.flags & IPCP_HISADDR_SEEN) == 0) { 3498 /* 3499 * If we are about to conf-ack the request, but haven't seen 3500 * his address so far, gonna conf-nak it instead, with the 3501 * `address' option present and our idea of his address being 3502 * filled in there, to request negotiation of both addresses. 3503 * 3504 * XXX This can result in an endless req - nak loop if peer 3505 * doesn't want to send us his address. Q: What should we do 3506 * about it? XXX A: implement the max-failure counter. 3507 */ 3508 buf[0] = IPCP_OPT_ADDRESS; 3509 buf[1] = 6; 3510 buf[2] = hisaddr >> 24; 3511 buf[3] = hisaddr >> 16; 3512 buf[4] = hisaddr >> 8; 3513 buf[5] = hisaddr; 3514 rlen = 6; 3515 if (debug) 3516 addlog(" still need hisaddr"); 3517 type = CONF_NAK; 3518 } else { 3519 type = CONF_ACK; 3520 rlen = origlen; 3521 memcpy(r, h + 1, rlen); 3522 } 3523 } 3524 3525 end: 3526 if (debug) 3527 addlog("\n"); 3528 3529 if (rlen < 0) { 3530 kmem_intr_free(buf, blen); 3531 return -1; 3532 } 3533 3534 if (sp->scp[IDX_IPCP].rcr_buf != NULL) { 3535 kmem_intr_free(sp->scp[IDX_IPCP].rcr_buf, 3536 sp->scp[IDX_IPCP].rcr_blen); 3537 } 3538 3539 sp->scp[IDX_IPCP].rcr_type = type; 3540 sp->scp[IDX_IPCP].rcr_buf = buf; 3541 sp->scp[IDX_IPCP].rcr_blen = blen; 3542 sp->scp[IDX_IPCP].rcr_rlen = rlen; 3543 3544 if (type != CONF_ACK) 3545 return 0; 3546 return 1; 3547 } 3548 3549 /* 3550 * Analyze the IPCP Configure-Reject option list, and adjust our 3551 * negotiation. 3552 */ 3553 static void 3554 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3555 { 3556 u_char *p, l; 3557 struct ifnet *ifp = &sp->pp_if; 3558 int debug = ifp->if_flags & IFF_DEBUG; 3559 3560 KASSERT(SPPP_WLOCKED(sp)); 3561 3562 if (len <= sizeof(*h)) 3563 return; 3564 3565 len -= sizeof(*h); 3566 3567 if (debug) 3568 log(LOG_DEBUG, "%s: ipcp rej opts:", 3569 ifp->if_xname); 3570 3571 p = (void *)(h + 1); 3572 for (; len > 1; len -= l, p += l) { 3573 l = p[1]; 3574 if (l == 0) 3575 break; 3576 3577 /* Sanity check option length */ 3578 if (l > len) { 3579 /* XXX should we just RXJ? */ 3580 addlog("%s: malicious IPCP option received, dropping\n", 3581 ifp->if_xname); 3582 goto end; 3583 } 3584 if (debug) 3585 addlog(" %s", sppp_ipcp_opt_name(*p)); 3586 switch (p[0]) { 3587 case IPCP_OPT_ADDRESS: 3588 /* 3589 * Peer doesn't grok address option. This is 3590 * bad. XXX Should we better give up here? 3591 */ 3592 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 3593 break; 3594 #ifdef notyet 3595 case IPCP_OPT_COMPRESS: 3596 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 3597 break; 3598 #endif 3599 } 3600 } 3601 if (debug) 3602 addlog("\n"); 3603 end: 3604 return; 3605 } 3606 3607 /* 3608 * Analyze the IPCP Configure-NAK option list, and adjust our 3609 * negotiation. 3610 */ 3611 static void 3612 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3613 { 3614 u_char *p, l; 3615 struct ifnet *ifp = &sp->pp_if; 3616 int debug = ifp->if_flags & IFF_DEBUG; 3617 uint32_t wantaddr; 3618 3619 KASSERT(SPPP_WLOCKED(sp)); 3620 3621 len -= sizeof(*h); 3622 3623 if (debug) 3624 log(LOG_DEBUG, "%s: ipcp nak opts:", 3625 ifp->if_xname); 3626 3627 p = (void *)(h + 1); 3628 for (; len > 1; len -= l, p += l) { 3629 l = p[1]; 3630 if (l == 0) 3631 break; 3632 3633 /* Sanity check option length */ 3634 if (l > len) { 3635 /* XXX should we just RXJ? */ 3636 addlog("%s: malicious IPCP option received, dropping\n", 3637 ifp->if_xname); 3638 return; 3639 } 3640 if (debug) 3641 addlog(" %s", sppp_ipcp_opt_name(*p)); 3642 switch (*p) { 3643 case IPCP_OPT_ADDRESS: 3644 /* 3645 * Peer doesn't like our local IP address. See 3646 * if we can do something for him. We'll drop 3647 * him our address then. 3648 */ 3649 if (len >= 6 && l == 6) { 3650 wantaddr = p[2] << 24 | p[3] << 16 | 3651 p[4] << 8 | p[5]; 3652 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3653 if (debug) 3654 addlog(" [wantaddr %s]", 3655 sppp_dotted_quad(wantaddr)); 3656 /* 3657 * When doing dynamic address assignment, 3658 * we accept his offer. Otherwise, we 3659 * ignore it and thus continue to negotiate 3660 * our already existing value. 3661 */ 3662 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3663 if (debug) 3664 addlog(" [agree]"); 3665 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3666 sp->ipcp.req_myaddr = wantaddr; 3667 } 3668 } 3669 break; 3670 3671 case IPCP_OPT_PRIMDNS: 3672 if (len >= 6 && l == 6) { 3673 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3674 p[4] << 8 | p[5]; 3675 } 3676 break; 3677 3678 case IPCP_OPT_SECDNS: 3679 if (len >= 6 && l == 6) { 3680 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3681 p[4] << 8 | p[5]; 3682 } 3683 break; 3684 #ifdef notyet 3685 case IPCP_OPT_COMPRESS: 3686 /* 3687 * Peer wants different compression parameters. 3688 */ 3689 break; 3690 #endif 3691 } 3692 } 3693 if (debug) 3694 addlog("\n"); 3695 } 3696 3697 static void 3698 sppp_ipcp_tlu(struct sppp *sp) 3699 { 3700 #ifdef INET 3701 KASSERT(SPPP_WLOCKED(sp)); 3702 /* we are up. Set addresses and notify anyone interested */ 3703 sppp_set_ip_addrs(sp); 3704 #endif 3705 } 3706 3707 static void 3708 sppp_ipcp_scr(struct sppp *sp) 3709 { 3710 uint8_t opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3711 #ifdef INET 3712 uint32_t ouraddr; 3713 #endif 3714 int i = 0; 3715 3716 KASSERT(SPPP_WLOCKED(sp)); 3717 3718 #ifdef notyet 3719 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3720 opt[i++] = IPCP_OPT_COMPRESSION; 3721 opt[i++] = 6; 3722 opt[i++] = 0; /* VJ header compression */ 3723 opt[i++] = 0x2d; /* VJ header compression */ 3724 opt[i++] = max_slot_id; 3725 opt[i++] = comp_slot_id; 3726 } 3727 #endif 3728 3729 #ifdef INET 3730 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3731 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3732 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3733 else 3734 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3735 opt[i++] = IPCP_OPT_ADDRESS; 3736 opt[i++] = 6; 3737 opt[i++] = ouraddr >> 24; 3738 opt[i++] = ouraddr >> 16; 3739 opt[i++] = ouraddr >> 8; 3740 opt[i++] = ouraddr; 3741 } 3742 #endif 3743 3744 if (sp->query_dns & 1) { 3745 opt[i++] = IPCP_OPT_PRIMDNS; 3746 opt[i++] = 6; 3747 opt[i++] = sp->dns_addrs[0] >> 24; 3748 opt[i++] = sp->dns_addrs[0] >> 16; 3749 opt[i++] = sp->dns_addrs[0] >> 8; 3750 opt[i++] = sp->dns_addrs[0]; 3751 } 3752 if (sp->query_dns & 2) { 3753 opt[i++] = IPCP_OPT_SECDNS; 3754 opt[i++] = 6; 3755 opt[i++] = sp->dns_addrs[1] >> 24; 3756 opt[i++] = sp->dns_addrs[1] >> 16; 3757 opt[i++] = sp->dns_addrs[1] >> 8; 3758 opt[i++] = sp->dns_addrs[1]; 3759 } 3760 3761 sp->scp[IDX_IPCP].confid = ++sp->scp[IDX_IPCP].seq; 3762 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->scp[IDX_IPCP].confid, i, &opt); 3763 } 3764 3765 3766 /* 3767 *--------------------------------------------------------------------------* 3768 * * 3769 * The IPv6CP implementation. * 3770 * * 3771 *--------------------------------------------------------------------------* 3772 */ 3773 3774 #ifdef INET6 3775 static void 3776 sppp_ipv6cp_init(struct sppp *sp) 3777 { 3778 3779 KASSERT(SPPP_WLOCKED(sp)); 3780 3781 sp->ipv6cp.opts = 0; 3782 sp->ipv6cp.flags = 0; 3783 sp->scp[IDX_IPV6CP].state = STATE_INITIAL; 3784 sp->scp[IDX_IPV6CP].fail_counter = 0; 3785 sp->scp[IDX_IPV6CP].seq = 0; 3786 sp->scp[IDX_IPV6CP].rseq = 0; 3787 sppp_cp_init(&ipv6cp, sp); 3788 } 3789 3790 static void 3791 sppp_ipv6cp_open(struct sppp *sp, void *xcp) 3792 { 3793 STDDCL; 3794 struct in6_addr myaddr, hisaddr; 3795 3796 KASSERT(SPPP_WLOCKED(sp)); 3797 3798 #ifdef IPV6CP_MYIFID_DYN 3799 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3800 #else 3801 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3802 #endif 3803 3804 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3805 /* 3806 * If we don't have our address, this probably means our 3807 * interface doesn't want to talk IPv6 at all. (This could 3808 * be the case if somebody wants to speak only IPX, for 3809 * example.) Don't open IPv6CP in this case. 3810 */ 3811 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3812 /* XXX this message should go away */ 3813 if (debug) 3814 log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n", 3815 ifp->if_xname); 3816 return; 3817 } 3818 3819 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3820 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3821 sppp_open_event(sp, xcp); 3822 } 3823 3824 /* 3825 * Analyze a configure request. Return true if it was agreeable, and 3826 * caused action sca, false if it has been rejected or nak'ed, and 3827 * caused action scn. (The return value is used to make the state 3828 * transition decision in the state automaton.) 3829 */ 3830 static int 3831 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int origlen) 3832 { 3833 u_char *buf, *r, *p, l, blen; 3834 struct ifnet *ifp = &sp->pp_if; 3835 int rlen, len, debug = ifp->if_flags & IFF_DEBUG; 3836 struct in6_addr myaddr, desiredaddr, suggestaddr; 3837 int ifidcount; 3838 int type; 3839 int collision, nohisaddr; 3840 char ip6buf[INET6_ADDRSTRLEN]; 3841 3842 KASSERT(SPPP_WLOCKED(sp)); 3843 3844 if (origlen < sizeof(*h)) 3845 return 0; 3846 3847 origlen -= sizeof(*h); 3848 type = 0; 3849 3850 /* 3851 * Make sure to allocate a buf that can at least hold a 3852 * conf-nak with an `address' option. We might need it below. 3853 */ 3854 blen = MAX(6, origlen); 3855 3856 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 3857 if (buf == NULL) 3858 return 0; 3859 3860 /* pass 1: see if we can recognize them */ 3861 if (debug) 3862 log(LOG_DEBUG, "%s: ipv6cp parse opts:", 3863 ifp->if_xname); 3864 p = (void *)(h + 1); 3865 r = buf; 3866 rlen = 0; 3867 ifidcount = 0; 3868 for (len = origlen; len > 1; len -= l, p += l) { 3869 l = p[1]; 3870 if (l == 0) 3871 break; 3872 3873 /* Sanity check option length */ 3874 if (l > len) { 3875 /* XXX just RXJ? */ 3876 addlog("%s: received malicious IPCPv6 option, " 3877 "dropping\n", ifp->if_xname); 3878 rlen = -1; 3879 goto end; 3880 } 3881 if (debug) 3882 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3883 switch (p[0]) { 3884 case IPV6CP_OPT_IFID: 3885 if (len >= 10 && l == 10 && ifidcount == 0) { 3886 /* correctly formed address option */ 3887 ifidcount++; 3888 continue; 3889 } 3890 if (debug) 3891 addlog(" [invalid]"); 3892 break; 3893 #ifdef notyet 3894 case IPV6CP_OPT_COMPRESSION: 3895 if (len >= 4 && l >= 4) { 3896 /* correctly formed compress option */ 3897 continue; 3898 } 3899 if (debug) 3900 addlog(" [invalid]"); 3901 break; 3902 #endif 3903 default: 3904 /* Others not supported. */ 3905 if (debug) 3906 addlog(" [rej]"); 3907 break; 3908 } 3909 if (rlen + l > blen) { 3910 if (debug) 3911 addlog(" [overflow]"); 3912 continue; 3913 } 3914 /* Add the option to rejected list. */ 3915 memcpy(r, p, l); 3916 r += l; 3917 rlen += l; 3918 } 3919 3920 if (rlen > 0) { 3921 type = CONF_REJ; 3922 goto end; 3923 } 3924 3925 if (debug) 3926 addlog("\n"); 3927 3928 /* pass 2: parse option values */ 3929 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3930 if (debug) 3931 log(LOG_DEBUG, "%s: ipv6cp parse opt values: ", 3932 ifp->if_xname); 3933 p = (void *)(h + 1); 3934 r = buf; 3935 rlen = 0; 3936 type = CONF_ACK; 3937 for (len = origlen; len > 1; len -= l, p += l) { 3938 l = p[1]; 3939 if (l == 0) 3940 break; 3941 3942 if (debug) 3943 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3944 switch (p[0]) { 3945 #ifdef notyet 3946 case IPV6CP_OPT_COMPRESSION: 3947 continue; 3948 #endif 3949 case IPV6CP_OPT_IFID: 3950 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3951 memcpy(&desiredaddr.s6_addr[8], &p[2], 8); 3952 collision = (memcmp(&desiredaddr.s6_addr[8], 3953 &myaddr.s6_addr[8], 8) == 0); 3954 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3955 3956 desiredaddr.s6_addr16[0] = htons(0xfe80); 3957 (void)in6_setscope(&desiredaddr, &sp->pp_if, NULL); 3958 3959 if (!collision && !nohisaddr) { 3960 /* no collision, hisaddr known - Conf-Ack */ 3961 type = CONF_ACK; 3962 3963 if (debug) { 3964 addlog(" %s [%s]", 3965 IN6_PRINT(ip6buf, &desiredaddr), 3966 sppp_cp_type_name(type)); 3967 } 3968 continue; 3969 } 3970 3971 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3972 if (collision && nohisaddr) { 3973 /* collision, hisaddr unknown - Conf-Rej */ 3974 type = CONF_REJ; 3975 memset(&p[2], 0, 8); 3976 } else { 3977 /* 3978 * - no collision, hisaddr unknown, or 3979 * - collision, hisaddr known 3980 * Conf-Nak, suggest hisaddr 3981 */ 3982 type = CONF_NAK; 3983 sppp_suggest_ip6_addr(sp, &suggestaddr); 3984 memcpy(&p[2], &suggestaddr.s6_addr[8], 8); 3985 } 3986 if (debug) 3987 addlog(" %s [%s]", IN6_PRINT(ip6buf, &desiredaddr), 3988 sppp_cp_type_name(type)); 3989 break; 3990 } 3991 if (rlen + l > blen) { 3992 if (debug) 3993 addlog(" [overflow]"); 3994 continue; 3995 } 3996 /* Add the option to nak'ed list. */ 3997 memcpy(r, p, l); 3998 r += l; 3999 rlen += l; 4000 } 4001 4002 if (rlen > 0) { 4003 if (type != CONF_ACK) { 4004 if (debug) { 4005 addlog(" send %s suggest %s\n", 4006 sppp_cp_type_name(type), 4007 IN6_PRINT(ip6buf, &suggestaddr)); 4008 } 4009 } 4010 #ifdef notdef 4011 if (type == CONF_ACK) 4012 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 4013 #endif 4014 } else { 4015 if (type == CONF_ACK) { 4016 rlen = origlen; 4017 memcpy(r, h + 1, rlen); 4018 } 4019 } 4020 end: 4021 if (debug) 4022 addlog("\n"); 4023 4024 if (rlen < 0) { 4025 kmem_intr_free(buf, blen); 4026 return -1; 4027 } 4028 4029 if (sp->scp[IDX_IPV6CP].rcr_buf != NULL) { 4030 kmem_intr_free(sp->scp[IDX_IPV6CP].rcr_buf, 4031 sp->scp[IDX_IPV6CP].rcr_blen); 4032 } 4033 4034 sp->scp[IDX_IPV6CP].rcr_type = type; 4035 sp->scp[IDX_IPV6CP].rcr_buf = buf; 4036 sp->scp[IDX_IPV6CP].rcr_blen = blen; 4037 sp->scp[IDX_IPV6CP].rcr_rlen = rlen; 4038 4039 if (type != CONF_ACK) 4040 return 0; 4041 return 0; 4042 } 4043 4044 /* 4045 * Analyze the IPv6CP Configure-Reject option list, and adjust our 4046 * negotiation. 4047 */ 4048 static void 4049 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 4050 { 4051 u_char *p, l; 4052 struct ifnet *ifp = &sp->pp_if; 4053 int debug = ifp->if_flags & IFF_DEBUG; 4054 4055 KASSERT(SPPP_WLOCKED(sp)); 4056 4057 if (len <= sizeof(*h)) 4058 return; 4059 4060 len -= sizeof(*h); 4061 4062 if (debug) 4063 log(LOG_DEBUG, "%s: ipv6cp rej opts:", 4064 ifp->if_xname); 4065 4066 p = (void *)(h + 1); 4067 for (; len > 1; len -= l, p += l) { 4068 l = p[1]; 4069 if (l == 0) 4070 break; 4071 4072 if (l > len) { 4073 /* XXX just RXJ? */ 4074 addlog("%s: received malicious IPCPv6 option, " 4075 "dropping\n", ifp->if_xname); 4076 goto end; 4077 } 4078 if (debug) 4079 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4080 switch (p[0]) { 4081 case IPV6CP_OPT_IFID: 4082 /* 4083 * Peer doesn't grok address option. This is 4084 * bad. XXX Should we better give up here? 4085 */ 4086 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 4087 break; 4088 #ifdef notyet 4089 case IPV6CP_OPT_COMPRESS: 4090 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 4091 break; 4092 #endif 4093 } 4094 } 4095 if (debug) 4096 addlog("\n"); 4097 end: 4098 return; 4099 } 4100 4101 /* 4102 * Analyze the IPv6CP Configure-NAK option list, and adjust our 4103 * negotiation. 4104 */ 4105 static void 4106 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 4107 { 4108 u_char *p, l; 4109 struct ifnet *ifp = &sp->pp_if; 4110 int debug = ifp->if_flags & IFF_DEBUG; 4111 struct in6_addr suggestaddr; 4112 char ip6buf[INET6_ADDRSTRLEN]; 4113 4114 KASSERT(SPPP_WLOCKED(sp)); 4115 4116 if (len <= sizeof(*h)) 4117 return; 4118 4119 len -= sizeof(*h); 4120 4121 if (debug) 4122 log(LOG_DEBUG, "%s: ipv6cp nak opts:", 4123 ifp->if_xname); 4124 4125 p = (void *)(h + 1); 4126 for (; len > 1; len -= l, p += l) { 4127 l = p[1]; 4128 if (l == 0) 4129 break; 4130 4131 if (l > len) { 4132 /* XXX just RXJ? */ 4133 addlog("%s: received malicious IPCPv6 option, " 4134 "dropping\n", ifp->if_xname); 4135 goto end; 4136 } 4137 if (debug) 4138 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4139 switch (p[0]) { 4140 case IPV6CP_OPT_IFID: 4141 /* 4142 * Peer doesn't like our local ifid. See 4143 * if we can do something for him. We'll drop 4144 * him our address then. 4145 */ 4146 if (len < 10 || l != 10) 4147 break; 4148 memset(&suggestaddr, 0, sizeof(suggestaddr)); 4149 suggestaddr.s6_addr16[0] = htons(0xfe80); 4150 (void)in6_setscope(&suggestaddr, &sp->pp_if, NULL); 4151 memcpy(&suggestaddr.s6_addr[8], &p[2], 8); 4152 4153 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 4154 if (debug) 4155 addlog(" [suggestaddr %s]", 4156 IN6_PRINT(ip6buf, &suggestaddr)); 4157 #ifdef IPV6CP_MYIFID_DYN 4158 /* 4159 * When doing dynamic address assignment, 4160 * we accept his offer. 4161 */ 4162 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 4163 struct in6_addr lastsuggest; 4164 /* 4165 * If <suggested myaddr from peer> equals to 4166 * <hisaddr we have suggested last time>, 4167 * we have a collision. generate new random 4168 * ifid. 4169 */ 4170 sppp_suggest_ip6_addr(&lastsuggest); 4171 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 4172 lastsuggest)) { 4173 if (debug) 4174 addlog(" [random]"); 4175 sppp_gen_ip6_addr(sp, &suggestaddr); 4176 } 4177 sppp_set_ip6_addr(sp, &suggestaddr, 0); 4178 if (debug) 4179 addlog(" [agree]"); 4180 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 4181 } 4182 #else 4183 /* 4184 * Since we do not do dynamic address assignment, 4185 * we ignore it and thus continue to negotiate 4186 * our already existing value. This can possibly 4187 * go into infinite request-reject loop. 4188 * 4189 * This is not likely because we normally use 4190 * ifid based on MAC-address. 4191 * If you have no ethernet card on the node, too bad. 4192 * XXX should we use fail_counter? 4193 */ 4194 #endif 4195 break; 4196 #ifdef notyet 4197 case IPV6CP_OPT_COMPRESS: 4198 /* 4199 * Peer wants different compression parameters. 4200 */ 4201 break; 4202 #endif 4203 } 4204 } 4205 if (debug) 4206 addlog("\n"); 4207 end: 4208 return; 4209 } 4210 4211 static void 4212 sppp_ipv6cp_tlu(struct sppp *sp) 4213 { 4214 4215 KASSERT(SPPP_WLOCKED(sp)); 4216 /* we are up - notify isdn daemon */ 4217 sppp_notify_con_wlocked(sp); 4218 } 4219 4220 static void 4221 sppp_ipv6cp_scr(struct sppp *sp) 4222 { 4223 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 4224 struct in6_addr ouraddr; 4225 int i = 0; 4226 4227 KASSERT(SPPP_WLOCKED(sp)); 4228 4229 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 4230 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 4231 opt[i++] = IPV6CP_OPT_IFID; 4232 opt[i++] = 10; 4233 memcpy(&opt[i], &ouraddr.s6_addr[8], 8); 4234 i += 8; 4235 } 4236 4237 #ifdef notyet 4238 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 4239 opt[i++] = IPV6CP_OPT_COMPRESSION; 4240 opt[i++] = 4; 4241 opt[i++] = 0; /* TBD */ 4242 opt[i++] = 0; /* TBD */ 4243 /* variable length data may follow */ 4244 } 4245 #endif 4246 4247 sp->scp[IDX_IPV6CP].confid = ++sp->scp[IDX_IPV6CP].seq; 4248 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->scp[IDX_IPV6CP].confid, i, &opt); 4249 } 4250 #else /*INET6*/ 4251 static void 4252 sppp_ipv6cp_init(struct sppp *sp) 4253 { 4254 4255 KASSERT(SPPP_WLOCKED(sp)); 4256 } 4257 4258 static void 4259 sppp_ipv6cp_open(struct sppp *sp, void *xcp) 4260 { 4261 4262 KASSERT(SPPP_WLOCKED(sp)); 4263 } 4264 4265 static int 4266 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, 4267 int len) 4268 { 4269 4270 KASSERT(SPPP_WLOCKED(sp)); 4271 return 0; 4272 } 4273 4274 static void 4275 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, 4276 int len) 4277 { 4278 4279 KASSERT(SPPP_WLOCKED(sp)); 4280 } 4281 4282 static void 4283 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, 4284 int len) 4285 { 4286 4287 KASSERT(SPPP_WLOCKED(sp)); 4288 } 4289 4290 static void 4291 sppp_ipv6cp_tlu(struct sppp *sp) 4292 { 4293 4294 KASSERT(SPPP_WLOCKED(sp)); 4295 } 4296 4297 static void 4298 sppp_ipv6cp_scr(struct sppp *sp) 4299 { 4300 4301 KASSERT(SPPP_WLOCKED(sp)); 4302 } 4303 #endif /*INET6*/ 4304 4305 4306 /* 4307 *--------------------------------------------------------------------------* 4308 * * 4309 * The CHAP implementation. * 4310 * * 4311 *--------------------------------------------------------------------------* 4312 */ 4313 /* 4314 * The authentication protocols is implemented on the state machine for 4315 * control protocols. And it uses following actions and events. 4316 * 4317 * Actions: 4318 * - scr: send CHAP_CHALLENGE and CHAP_RESPONSE 4319 * - sca: send CHAP_SUCCESS 4320 * - scn: send CHAP_FAILURE and shutdown lcp 4321 * Events: 4322 * - RCR+: receive CHAP_RESPONSE containing correct digest 4323 * - RCR-: receive CHAP_RESPONSE containing wrong digest 4324 * - RCA: receive CHAP_SUCCESS 4325 * - RCN: (this event is unused) 4326 * - TO+: re-send CHAP_CHALLENGE and CHAP_RESPONSE 4327 * - TO-: this layer finish 4328 */ 4329 4330 /* 4331 * Handle incoming CHAP packets. 4332 */ 4333 void 4334 sppp_chap_input(struct sppp *sp, struct mbuf *m) 4335 { 4336 STDDCL; 4337 struct lcp_header *h; 4338 int len, x; 4339 u_char *value, *name, digest[sizeof(sp->chap.challenge)]; 4340 int value_len, name_len; 4341 MD5_CTX ctx; 4342 4343 len = m->m_pkthdr.len; 4344 if (len < 4) { 4345 if (debug) 4346 log(LOG_DEBUG, 4347 "%s: chap invalid packet length: %d bytes\n", 4348 ifp->if_xname, len); 4349 return; 4350 } 4351 h = mtod(m, struct lcp_header *); 4352 if (len > ntohs(h->len)) 4353 len = ntohs(h->len); 4354 4355 SPPP_LOCK(sp, RW_WRITER); 4356 4357 switch (h->type) { 4358 /* challenge, failure and success are his authproto */ 4359 case CHAP_CHALLENGE: 4360 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4361 /* can't do anything useful */ 4362 sp->pp_auth_failures++; 4363 printf("%s: chap input without my name and my secret being set\n", 4364 ifp->if_xname); 4365 break; 4366 } 4367 value = 1 + (u_char *)(h + 1); 4368 value_len = value[-1]; 4369 name = value + value_len; 4370 name_len = len - value_len - 5; 4371 if (name_len < 0) { 4372 if (debug) { 4373 log(LOG_DEBUG, 4374 "%s: chap corrupted challenge " 4375 "<%s id=0x%x len=%d", 4376 ifp->if_xname, 4377 sppp_auth_type_name(PPP_CHAP, h->type), 4378 h->ident, ntohs(h->len)); 4379 if (len > 4) 4380 sppp_print_bytes((u_char *)(h + 1), 4381 len - 4); 4382 addlog(">\n"); 4383 } 4384 break; 4385 } 4386 4387 if (debug) { 4388 log(LOG_DEBUG, 4389 "%s: chap input <%s id=0x%x len=%d name=", 4390 ifp->if_xname, 4391 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 4392 ntohs(h->len)); 4393 sppp_print_string((char *) name, name_len); 4394 addlog(" value-size=%d value=", value_len); 4395 sppp_print_bytes(value, value_len); 4396 addlog(">\n"); 4397 } 4398 4399 /* Compute reply value. */ 4400 MD5Init(&ctx); 4401 MD5Update(&ctx, &h->ident, 1); 4402 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 4403 MD5Update(&ctx, value, value_len); 4404 MD5Final(sp->chap.digest, &ctx); 4405 sp->chap.digest_len = sizeof(sp->chap.digest); 4406 sp->scp[IDX_CHAP].rconfid = h->ident; 4407 4408 sppp_wq_add(sp->wq_cp, &sp->chap.work_challenge_rcvd); 4409 break; 4410 4411 case CHAP_SUCCESS: 4412 if (debug) { 4413 log(LOG_DEBUG, "%s: chap success", 4414 ifp->if_xname); 4415 if (len > 4) { 4416 addlog(": "); 4417 sppp_print_string((char *)(h + 1), len - 4); 4418 } 4419 addlog("\n"); 4420 } 4421 4422 if (h->ident != sp->scp[IDX_CHAP].rconfid) { 4423 if (debug) { 4424 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4425 ifp->if_xname, chap.name, 4426 h->ident, sp->scp[IDX_CHAP].rconfid); 4427 } 4428 if_statinc(ifp, if_ierrors); 4429 break; 4430 } 4431 4432 if (sp->chap.digest_len == 0) { 4433 if (debug) { 4434 log(LOG_DEBUG, 4435 "%s: receive CHAP success without challenge\n", 4436 ifp->if_xname); 4437 } 4438 if_statinc(ifp, if_ierrors); 4439 break; 4440 } 4441 4442 x = splnet(); 4443 sp->pp_auth_failures = 0; 4444 sp->pp_flags &= ~PP_NEEDAUTH; 4445 splx(x); 4446 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4447 sp->chap.digest_len = 0; 4448 4449 if (!ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_SERV)) { 4450 /* 4451 * we are not authenticator for CHAP, 4452 * generate a dummy RCR+ event without CHAP_RESPONSE 4453 */ 4454 sp->scp[IDX_CHAP].rcr_type = CONF_ACK; 4455 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4456 } 4457 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rca); 4458 break; 4459 4460 case CHAP_FAILURE: 4461 if (h->ident != sp->scp[IDX_CHAP].rconfid) { 4462 if (debug) { 4463 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4464 ifp->if_xname, chap.name, 4465 h->ident, sp->scp[IDX_CHAP].rconfid); 4466 } 4467 if_statinc(ifp, if_ierrors); 4468 break; 4469 } 4470 4471 if (sp->chap.digest_len == 0) { 4472 if (debug) { 4473 log(LOG_DEBUG, 4474 "%s: receive CHAP failure without challenge\n", 4475 ifp->if_xname); 4476 } 4477 if_statinc(ifp, if_ierrors); 4478 break; 4479 } 4480 4481 x = splnet(); 4482 sp->pp_auth_failures++; 4483 splx(x); 4484 if (debug) { 4485 log(LOG_INFO, "%s: chap failure", 4486 ifp->if_xname); 4487 if (len > 4) { 4488 addlog(": "); 4489 sppp_print_string((char *)(h + 1), len - 4); 4490 } 4491 addlog("\n"); 4492 } else 4493 log(LOG_INFO, "%s: chap failure\n", 4494 ifp->if_xname); 4495 4496 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4497 sp->chap.digest_len = 0; 4498 /* 4499 * await LCP shutdown by authenticator, 4500 * so we don't have to enqueue sc->scp[IDX_CHAP].work_rcn 4501 */ 4502 break; 4503 4504 /* response is my authproto */ 4505 case CHAP_RESPONSE: 4506 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4507 /* can't do anything useful */ 4508 printf("%s: chap response" 4509 " without his name and his secret being set\n", 4510 ifp->if_xname); 4511 break; 4512 } 4513 value = 1 + (u_char *)(h + 1); 4514 value_len = value[-1]; 4515 name = value + value_len; 4516 name_len = len - value_len - 5; 4517 if (name_len < 0) { 4518 if (debug) { 4519 log(LOG_DEBUG, 4520 "%s: chap corrupted response " 4521 "<%s id=0x%x len=%d", 4522 ifp->if_xname, 4523 sppp_auth_type_name(PPP_CHAP, h->type), 4524 h->ident, ntohs(h->len)); 4525 if (len > 4) 4526 sppp_print_bytes((u_char *)(h + 1), 4527 len - 4); 4528 addlog(">\n"); 4529 } 4530 break; 4531 } 4532 if (h->ident != sp->scp[IDX_CHAP].confid) { 4533 if (debug) 4534 log(LOG_DEBUG, 4535 "%s: chap dropping response for old ID " 4536 "(got %d, expected %d)\n", 4537 ifp->if_xname, 4538 h->ident, sp->scp[IDX_CHAP].confid); 4539 break; 4540 } else { 4541 sp->scp[IDX_CHAP].rconfid = h->ident; 4542 } 4543 4544 if (sp->hisauth.name != NULL && 4545 (name_len != sp->hisauth.name_len 4546 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 4547 log(LOG_INFO, "%s: chap response, his name ", 4548 ifp->if_xname); 4549 sppp_print_string(name, name_len); 4550 addlog(" != expected "); 4551 sppp_print_string(sp->hisauth.name, 4552 sp->hisauth.name_len); 4553 addlog("\n"); 4554 4555 /* generate RCR- event */ 4556 sp->scp[IDX_CHAP].rcr_type = CONF_NAK; 4557 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4558 break; 4559 } 4560 4561 if (debug) { 4562 log(LOG_DEBUG, "%s: chap input(%s) " 4563 "<%s id=0x%x len=%d name=", 4564 ifp->if_xname, 4565 sppp_state_name(sp->scp[IDX_CHAP].state), 4566 sppp_auth_type_name(PPP_CHAP, h->type), 4567 h->ident, ntohs(h->len)); 4568 sppp_print_string((char *)name, name_len); 4569 addlog(" value-size=%d value=", value_len); 4570 sppp_print_bytes(value, value_len); 4571 addlog(">\n"); 4572 } 4573 4574 if (value_len == sizeof(sp->chap.challenge) && 4575 value_len == sizeof(sp->chap.digest)) { 4576 MD5Init(&ctx); 4577 MD5Update(&ctx, &h->ident, 1); 4578 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 4579 MD5Update(&ctx, sp->chap.challenge, sizeof(sp->chap.challenge)); 4580 MD5Final(digest, &ctx); 4581 4582 if (memcmp(digest, value, value_len) == 0) { 4583 sp->scp[IDX_CHAP].rcr_type = CONF_ACK; 4584 if (!ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_PEER) || 4585 sp->chap.rechallenging) { 4586 /* generate a dummy RCA event*/ 4587 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rca); 4588 } 4589 } else { 4590 sp->scp[IDX_CHAP].rcr_type = CONF_NAK; 4591 } 4592 } else { 4593 if (debug) 4594 log(LOG_DEBUG, 4595 "%s: chap bad hash value length: " 4596 "%d bytes, should be %zu\n", 4597 ifp->if_xname, value_len, 4598 sizeof(sp->chap.challenge)); 4599 4600 sp->scp[IDX_CHAP].rcr_type = CONF_NAK; 4601 } 4602 4603 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4604 break; 4605 4606 default: 4607 /* Unknown CHAP packet type -- ignore. */ 4608 if (debug) { 4609 log(LOG_DEBUG, "%s: chap unknown input(%s) " 4610 "<0x%x id=0x%xh len=%d", 4611 ifp->if_xname, 4612 sppp_state_name(sp->scp[IDX_CHAP].state), 4613 h->type, h->ident, ntohs(h->len)); 4614 if (len > 4) 4615 sppp_print_bytes((u_char *)(h + 1), len - 4); 4616 addlog(">\n"); 4617 } 4618 break; 4619 4620 } 4621 4622 SPPP_UNLOCK(sp); 4623 } 4624 4625 static void 4626 sppp_chap_init(struct sppp *sp) 4627 { 4628 4629 KASSERT(SPPP_WLOCKED(sp)); 4630 4631 sp->scp[IDX_CHAP].state = STATE_INITIAL; 4632 sp->scp[IDX_CHAP].fail_counter = 0; 4633 sp->scp[IDX_CHAP].seq = 0; 4634 sp->scp[IDX_CHAP].rseq = 0; 4635 SPPP_WQ_SET(&sp->chap.work_challenge_rcvd, 4636 sppp_chap_rcv_challenge_event, &chap); 4637 sppp_cp_init(&chap, sp); 4638 } 4639 4640 static void 4641 sppp_chap_open(struct sppp *sp, void *xcp) 4642 { 4643 4644 KASSERT(SPPP_WLOCKED(sp)); 4645 4646 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4647 sp->chap.digest_len = 0; 4648 sp->chap.rechallenging = false; 4649 sp->chap.response_rcvd = false; 4650 sppp_open_event(sp, xcp); 4651 } 4652 4653 static void 4654 sppp_chap_tlu(struct sppp *sp) 4655 { 4656 STDDCL; 4657 int i, x; 4658 4659 KASSERT(SPPP_WLOCKED(sp)); 4660 4661 i = 0; 4662 sp->scp[IDX_CHAP].rst_counter = sp->lcp.max_configure; 4663 x = splnet(); 4664 sp->pp_auth_failures = 0; 4665 splx(x); 4666 4667 log(LOG_DEBUG, "%s: chap %s", ifp->if_xname, 4668 sp->pp_phase == SPPP_PHASE_NETWORK ? "reconfirmed" : "tlu"); 4669 4670 /* 4671 * Some broken CHAP implementations (Conware CoNet, firmware 4672 * 4.0.?) don't want to re-authenticate their CHAP once the 4673 * initial challenge-response exchange has taken place. 4674 * Provide for an option to avoid rechallenges. 4675 */ 4676 if (ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_SERV) && 4677 (sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4678 /* 4679 * Compute the re-challenge timeout. This will yield 4680 * a number between 300 and 810 seconds. 4681 */ 4682 i = 300 + ((unsigned)(cprng_fast32() & 0xff00) >> 7); 4683 callout_schedule(&sp->scp[IDX_CHAP].ch, i * hz); 4684 4685 if (debug) { 4686 addlog(", next rechallenge in %d seconds", i); 4687 } 4688 } 4689 4690 addlog("\n"); 4691 4692 /* 4693 * If we are already in phase network, we are done here. This 4694 * is the case if this is a dummy tlu event after a re-challenge. 4695 */ 4696 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4697 sppp_phase_network(sp); 4698 } 4699 4700 static void 4701 sppp_chap_scr(struct sppp *sp) 4702 { 4703 uint32_t *ch; 4704 u_char clen, dsize; 4705 int role; 4706 4707 KASSERT(SPPP_WLOCKED(sp)); 4708 4709 role = sppp_auth_role(&chap, sp); 4710 4711 if (ISSET(role, SPPP_AUTH_SERV) && 4712 !sp->chap.response_rcvd) { 4713 /* we are authenticator for CHAP, send challenge */ 4714 ch = (uint32_t *)sp->chap.challenge; 4715 clen = sizeof(sp->chap.challenge); 4716 /* Compute random challenge. */ 4717 cprng_strong(kern_cprng, ch, clen, 0); 4718 4719 sp->scp[IDX_CHAP].confid = ++sp->scp[IDX_CHAP].seq; 4720 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->scp[IDX_CHAP].confid, 4721 sizeof(clen), (const char *)&clen, 4722 sizeof(sp->chap.challenge), sp->chap.challenge, 4723 0); 4724 } 4725 4726 if (ISSET(role, SPPP_AUTH_PEER) && 4727 sp->chap.digest_len > 0) { 4728 /* we are peer for CHAP, send response */ 4729 dsize = sp->chap.digest_len; 4730 4731 sppp_auth_send(&chap, sp, CHAP_RESPONSE, sp->scp[IDX_CHAP].rconfid, 4732 sizeof(dsize), (const char *)&dsize, 4733 sp->chap.digest_len, sp->chap.digest, 4734 sp->myauth.name_len, sp->myauth.name, 0); 4735 } 4736 } 4737 4738 static void 4739 sppp_chap_rcv_challenge_event(struct sppp *sp, void *xcp) 4740 { 4741 const struct cp *cp = xcp; 4742 4743 sp->chap.rechallenging = false; 4744 4745 switch (sp->scp[IDX_CHAP].state) { 4746 case STATE_REQ_SENT: 4747 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 4748 cp->scr(sp); 4749 break; 4750 case STATE_OPENED: 4751 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 4752 cp->scr(sp); 4753 break; 4754 } 4755 } 4756 4757 /* 4758 *--------------------------------------------------------------------------* 4759 * * 4760 * The PAP implementation. * 4761 * * 4762 *--------------------------------------------------------------------------* 4763 */ 4764 /* 4765 * PAP uses following actions and events. 4766 * Actions: 4767 * - scr: send PAP_REQ 4768 * - sca: send PAP_ACK 4769 * - scn: send PAP_NAK 4770 * Events: 4771 * - RCR+: receive PAP_REQ containing correct username and password 4772 * - RCR-: receive PAP_REQ containing wrong username and password 4773 * - RCA: receive PAP_ACK 4774 * - RCN: (this event is unused) 4775 * - TO+: re-send PAP_REQ 4776 * - TO-: this layer finish 4777 */ 4778 4779 /* 4780 * Handle incoming PAP packets. */ 4781 static void 4782 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4783 { 4784 STDDCL; 4785 struct lcp_header *h; 4786 int len, x; 4787 char *name, *secret; 4788 int name_len, secret_len; 4789 4790 /* 4791 * Malicious input might leave this uninitialized, so 4792 * init to an impossible value. 4793 */ 4794 secret_len = -1; 4795 4796 len = m->m_pkthdr.len; 4797 if (len < 5) { 4798 if (debug) 4799 log(LOG_DEBUG, 4800 "%s: pap invalid packet length: %d bytes\n", 4801 ifp->if_xname, len); 4802 return; 4803 } 4804 h = mtod(m, struct lcp_header *); 4805 if (len > ntohs(h->len)) 4806 len = ntohs(h->len); 4807 4808 SPPP_LOCK(sp, RW_WRITER); 4809 4810 switch (h->type) { 4811 /* PAP request is my authproto */ 4812 case PAP_REQ: 4813 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4814 /* can't do anything useful */ 4815 printf("%s: pap request" 4816 " without his name and his secret being set\n", 4817 ifp->if_xname); 4818 break; 4819 } 4820 name = 1 + (u_char *)(h + 1); 4821 name_len = name[-1]; 4822 secret = name + name_len + 1; 4823 if (name_len > len - 6 || 4824 (secret_len = secret[-1]) > len - 6 - name_len) { 4825 if (debug) { 4826 log(LOG_DEBUG, "%s: pap corrupted input " 4827 "<%s id=0x%x len=%d", 4828 ifp->if_xname, 4829 sppp_auth_type_name(PPP_PAP, h->type), 4830 h->ident, ntohs(h->len)); 4831 if (len > 4) 4832 sppp_print_bytes((u_char *)(h + 1), 4833 len - 4); 4834 addlog(">\n"); 4835 } 4836 break; 4837 } 4838 if (debug) { 4839 log(LOG_DEBUG, "%s: pap input(%s) " 4840 "<%s id=0x%x len=%d name=", 4841 ifp->if_xname, 4842 sppp_state_name(sp->scp[IDX_PAP].state), 4843 sppp_auth_type_name(PPP_PAP, h->type), 4844 h->ident, ntohs(h->len)); 4845 sppp_print_string((char *)name, name_len); 4846 addlog(" secret="); 4847 sppp_print_string((char *)secret, secret_len); 4848 addlog(">\n"); 4849 } 4850 4851 sp->scp[IDX_PAP].rconfid = h->ident; 4852 4853 if (name_len == sp->hisauth.name_len && 4854 memcmp(name, sp->hisauth.name, name_len) == 0 && 4855 secret_len == sp->hisauth.secret_len && 4856 memcmp(secret, sp->hisauth.secret, secret_len) == 0) { 4857 sp->scp[IDX_PAP].rcr_type = CONF_ACK; 4858 if (!ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_PEER)) { 4859 /* generate a dummy RCA event*/ 4860 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rca); 4861 } 4862 } else { 4863 sp->scp[IDX_PAP].rcr_type = CONF_NAK; 4864 } 4865 4866 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rcr); 4867 break; 4868 4869 /* ack and nak are his authproto */ 4870 case PAP_ACK: 4871 if (debug) { 4872 log(LOG_DEBUG, "%s: pap success", 4873 ifp->if_xname); 4874 name = 1 + (u_char *)(h + 1); 4875 name_len = name[-1]; 4876 if (len > 5 && name_len < len+4) { 4877 addlog(": "); 4878 sppp_print_string(name, name_len); 4879 } 4880 addlog("\n"); 4881 } 4882 4883 if (h->ident != sp->scp[IDX_PAP].confid) { 4884 if (debug) { 4885 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4886 ifp->if_xname, pap.name, 4887 h->ident, sp->scp[IDX_PAP].rconfid); 4888 } 4889 if_statinc(ifp, if_ierrors); 4890 break; 4891 } 4892 4893 x = splnet(); 4894 sp->pp_auth_failures = 0; 4895 sp->pp_flags &= ~PP_NEEDAUTH; 4896 splx(x); 4897 4898 /* we are not authenticator, generate a dummy RCR+ event */ 4899 if (!ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_SERV)) { 4900 sp->scp[IDX_PAP].rcr_type = CONF_ACK; 4901 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rcr); 4902 } 4903 4904 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rca); 4905 break; 4906 4907 case PAP_NAK: 4908 if (debug) { 4909 log(LOG_INFO, "%s: pap failure", 4910 ifp->if_xname); 4911 name = 1 + (u_char *)(h + 1); 4912 name_len = name[-1]; 4913 if (len > 5 && name_len < len+4) { 4914 addlog(": "); 4915 sppp_print_string(name, name_len); 4916 } 4917 addlog("\n"); 4918 } else 4919 log(LOG_INFO, "%s: pap failure\n", 4920 ifp->if_xname); 4921 4922 if (h->ident != sp->scp[IDX_PAP].confid) { 4923 if (debug) { 4924 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4925 ifp->if_xname, pap.name, 4926 h->ident, sp->scp[IDX_PAP].rconfid); 4927 } 4928 if_statinc(ifp, if_ierrors); 4929 break; 4930 } 4931 4932 sp->pp_auth_failures++; 4933 /* 4934 * await LCP shutdown by authenticator, 4935 * so we don't have to enqueue sc->scp[IDX_PAP].work_rcn 4936 */ 4937 break; 4938 4939 default: 4940 /* Unknown PAP packet type -- ignore. */ 4941 if (debug) { 4942 log(LOG_DEBUG, "%s: pap corrupted input " 4943 "<0x%x id=0x%x len=%d", 4944 ifp->if_xname, 4945 h->type, h->ident, ntohs(h->len)); 4946 if (len > 4) 4947 sppp_print_bytes((u_char *)(h + 1), len - 4); 4948 addlog(">\n"); 4949 } 4950 break; 4951 } 4952 4953 SPPP_UNLOCK(sp); 4954 } 4955 4956 static void 4957 sppp_pap_init(struct sppp *sp) 4958 { 4959 4960 KASSERT(SPPP_WLOCKED(sp)); 4961 4962 sp->scp[IDX_PAP].state = STATE_INITIAL; 4963 sp->scp[IDX_PAP].fail_counter = 0; 4964 sp->scp[IDX_PAP].seq = 0; 4965 sp->scp[IDX_PAP].rseq = 0; 4966 sppp_cp_init(&pap, sp); 4967 } 4968 4969 static void 4970 sppp_pap_tlu(struct sppp *sp) 4971 { 4972 STDDCL; 4973 int x; 4974 4975 sp->scp[IDX_PAP].rst_counter = sp->lcp.max_configure; 4976 4977 if (debug) 4978 log(LOG_DEBUG, "%s: %s tlu\n", 4979 ifp->if_xname, pap.name); 4980 4981 x = splnet(); 4982 sp->pp_auth_failures = 0; 4983 splx(x); 4984 4985 if (sp->pp_phase < SPPP_PHASE_NETWORK) 4986 sppp_phase_network(sp); 4987 } 4988 4989 static void 4990 sppp_pap_scr(struct sppp *sp) 4991 { 4992 u_char idlen, pwdlen; 4993 4994 KASSERT(SPPP_WLOCKED(sp)); 4995 4996 if (ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_PEER) && 4997 sp->scp[IDX_PAP].state != STATE_ACK_RCVD) { 4998 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4999 log(LOG_DEBUG, "%s: couldn't send PAP_REQ " 5000 "because of no name or no secret\n", 5001 sp->pp_if.if_xname); 5002 } else { 5003 sp->scp[IDX_PAP].confid = ++sp->scp[IDX_PAP].seq; 5004 pwdlen = sp->myauth.secret_len; 5005 idlen = sp->myauth.name_len; 5006 5007 sppp_auth_send(&pap, sp, PAP_REQ, sp->scp[IDX_PAP].confid, 5008 sizeof idlen, (const char *)&idlen, 5009 idlen, sp->myauth.name, 5010 sizeof pwdlen, (const char *)&pwdlen, 5011 pwdlen, sp->myauth.secret, 5012 0); 5013 } 5014 } 5015 } 5016 5017 /* 5018 * Random miscellaneous functions. 5019 */ 5020 5021 /* 5022 * Send a PAP or CHAP proto packet. 5023 * 5024 * Varadic function, each of the elements for the ellipsis is of type 5025 * ``size_t mlen, const u_char *msg''. Processing will stop iff 5026 * mlen == 0. 5027 * NOTE: never declare variadic functions with types subject to type 5028 * promotion (i.e. u_char). This is asking for big trouble depending 5029 * on the architecture you are on... 5030 */ 5031 5032 static void 5033 sppp_auth_send(const struct cp *cp, struct sppp *sp, 5034 unsigned int type, unsigned int id, 5035 ...) 5036 { 5037 STDDCL; 5038 struct lcp_header *lh; 5039 struct mbuf *m; 5040 u_char *p; 5041 int len; 5042 size_t pkthdrlen; 5043 unsigned int mlen; 5044 const char *msg; 5045 va_list ap; 5046 5047 KASSERT(SPPP_WLOCKED(sp)); 5048 5049 MGETHDR(m, M_DONTWAIT, MT_DATA); 5050 if (! m) 5051 return; 5052 m_reset_rcvif(m); 5053 5054 if (sp->pp_flags & PP_NOFRAMING) { 5055 *mtod(m, uint16_t *) = htons(cp->proto); 5056 pkthdrlen = 2; 5057 lh = (struct lcp_header *)(mtod(m, uint8_t *)+2); 5058 } else { 5059 struct ppp_header *h; 5060 h = mtod(m, struct ppp_header *); 5061 h->address = PPP_ALLSTATIONS; /* broadcast address */ 5062 h->control = PPP_UI; /* Unnumbered Info */ 5063 h->protocol = htons(cp->proto); 5064 pkthdrlen = PPP_HEADER_LEN; 5065 5066 lh = (struct lcp_header *)(h + 1); 5067 } 5068 5069 lh->type = type; 5070 lh->ident = id; 5071 p = (u_char *)(lh + 1); 5072 5073 va_start(ap, id); 5074 len = 0; 5075 5076 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 5077 msg = va_arg(ap, const char *); 5078 len += mlen; 5079 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 5080 va_end(ap); 5081 m_freem(m); 5082 return; 5083 } 5084 5085 memcpy(p, msg, mlen); 5086 p += mlen; 5087 } 5088 va_end(ap); 5089 5090 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 5091 lh->len = htons(LCP_HEADER_LEN + len); 5092 5093 if (debug) { 5094 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 5095 ifp->if_xname, cp->name, 5096 sppp_auth_type_name(cp->proto, lh->type), 5097 lh->ident, ntohs(lh->len)); 5098 if (len) 5099 sppp_print_bytes((u_char *)(lh + 1), len); 5100 addlog(">\n"); 5101 } 5102 if (IF_QFULL(&sp->pp_cpq)) { 5103 IF_DROP(&sp->pp_fastq); 5104 IF_DROP(&ifp->if_snd); 5105 m_freem(m); 5106 if_statinc(ifp, if_oerrors); 5107 return; 5108 } 5109 5110 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 5111 IF_ENQUEUE(&sp->pp_cpq, m); 5112 5113 if (! (ifp->if_flags & IFF_OACTIVE)) { 5114 SPPP_UNLOCK(sp); 5115 if_start_lock(ifp); 5116 SPPP_LOCK(sp, RW_WRITER); 5117 } 5118 } 5119 5120 static int 5121 sppp_auth_role(const struct cp *cp, struct sppp *sp) 5122 { 5123 int role; 5124 5125 role = SPPP_AUTH_NOROLE; 5126 5127 if (sp->hisauth.proto == cp->proto && 5128 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) 5129 SET(role, SPPP_AUTH_SERV); 5130 5131 if (sp->myauth.proto == cp->proto) 5132 SET(role, SPPP_AUTH_PEER); 5133 5134 return role; 5135 } 5136 5137 static void 5138 sppp_auth_to_event(struct sppp *sp, void *xcp) 5139 { 5140 const struct cp *cp = xcp; 5141 bool override; 5142 int state; 5143 STDDCL; 5144 5145 KASSERT(SPPP_WLOCKED(sp)); 5146 5147 override = false; 5148 state = sp->scp[cp->protoidx].state; 5149 5150 if (sp->scp[cp->protoidx].rst_counter > 0) { 5151 /* override TO+ event */ 5152 switch (state) { 5153 case STATE_OPENED: 5154 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 5155 override = true; 5156 sp->chap.rechallenging = true; 5157 sp->chap.response_rcvd = false; 5158 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 5159 cp->scr(sp); 5160 } 5161 break; 5162 5163 case STATE_ACK_RCVD: 5164 override = true; 5165 cp->scr(sp); 5166 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 5167 break; 5168 } 5169 } 5170 5171 if (override) { 5172 if (debug) 5173 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 5174 ifp->if_xname, cp->name, 5175 sppp_state_name(state), 5176 sp->scp[cp->protoidx].rst_counter); 5177 sp->scp[cp->protoidx].rst_counter--; 5178 } else { 5179 sppp_to_event(sp, xcp); 5180 } 5181 } 5182 5183 static void 5184 sppp_auth_sca_scn(const struct cp *cp, struct sppp *sp) 5185 { 5186 static const char *succmsg = "Welcome!"; 5187 static const char *failmsg = "Failed..."; 5188 const char *msg; 5189 u_char type, rconfid, mlen; 5190 5191 KASSERT(SPPP_WLOCKED(sp)); 5192 5193 if (!ISSET(sppp_auth_role(cp, sp), SPPP_AUTH_SERV)) 5194 return; 5195 5196 rconfid = sp->scp[cp->protoidx].rconfid; 5197 5198 if (sp->scp[cp->protoidx].rcr_type == CONF_ACK) { 5199 type = cp->proto == PPP_CHAP ? CHAP_SUCCESS : PAP_ACK; 5200 msg = succmsg; 5201 mlen = sizeof(succmsg) - 1; 5202 5203 sp->pp_auth_failures = 0; 5204 } else { 5205 type = cp->proto == PPP_CHAP ? CHAP_FAILURE : PAP_NAK; 5206 msg = failmsg; 5207 mlen = sizeof(failmsg) - 1; 5208 5209 /* shutdown LCP if auth failed */ 5210 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5211 sp->pp_auth_failures++; 5212 } 5213 5214 sppp_auth_send(cp, sp, type, rconfid, 5215 mlen, (const u_char *)msg, 0); 5216 } 5217 5218 /* 5219 * Send keepalive packets, every 10 seconds. 5220 */ 5221 static void 5222 sppp_keepalive(void *dummy) 5223 { 5224 struct sppp *sp; 5225 int s; 5226 time_t now; 5227 5228 SPPPQ_LOCK(); 5229 5230 s = splnet(); 5231 now = time_uptime; 5232 for (sp=spppq; sp; sp=sp->pp_next) { 5233 struct ifnet *ifp = NULL; 5234 5235 SPPP_LOCK(sp, RW_WRITER); 5236 ifp = &sp->pp_if; 5237 5238 /* check idle timeout */ 5239 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 5240 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 5241 /* idle timeout is enabled for this interface */ 5242 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 5243 if (ifp->if_flags & IFF_DEBUG) 5244 printf("%s: no activity for %lu seconds\n", 5245 sp->pp_if.if_xname, 5246 (unsigned long)(now-sp->pp_last_activity)); 5247 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5248 SPPP_UNLOCK(sp); 5249 continue; 5250 } 5251 } 5252 5253 /* Keepalive mode disabled or channel down? */ 5254 if (! (sp->pp_flags & PP_KEEPALIVE) || 5255 ! (ifp->if_flags & IFF_RUNNING)) { 5256 SPPP_UNLOCK(sp); 5257 continue; 5258 } 5259 5260 5261 /* No keepalive in PPP mode if LCP not opened yet. */ 5262 if (! (sp->pp_flags & PP_CISCO) && 5263 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 5264 SPPP_UNLOCK(sp); 5265 continue; 5266 } 5267 5268 /* No echo reply, but maybe user data passed through? */ 5269 if ((now - sp->pp_last_receive) < sp->pp_max_noreceive) { 5270 sp->pp_alivecnt = 0; 5271 SPPP_UNLOCK(sp); 5272 continue; 5273 } 5274 5275 if (sp->pp_alivecnt >= sp->pp_maxalive) { 5276 /* No keepalive packets got. Stop the interface. */ 5277 sppp_wq_add(sp->wq_cp, &sp->work_ifdown); 5278 5279 if (! (sp->pp_flags & PP_CISCO)) { 5280 printf("%s: LCP keepalive timed out, going to restart the connection\n", 5281 ifp->if_xname); 5282 sp->pp_alivecnt = 0; 5283 5284 /* we are down, close all open protocols */ 5285 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5286 5287 /* And now prepare LCP to reestablish the link, if configured to do so. */ 5288 sp->lcp.reestablish = true; 5289 5290 SPPP_UNLOCK(sp); 5291 continue; 5292 } 5293 } 5294 if (sp->pp_alivecnt < sp->pp_maxalive) 5295 ++sp->pp_alivecnt; 5296 if (sp->pp_flags & PP_CISCO) 5297 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, 5298 ++sp->scp[IDX_LCP].seq, sp->scp[IDX_LCP].rseq); 5299 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 5300 int32_t nmagic = htonl(sp->lcp.magic); 5301 sp->lcp.echoid = ++sp->scp[IDX_LCP].seq; 5302 sppp_cp_send(sp, PPP_LCP, ECHO_REQ, 5303 sp->lcp.echoid, 4, &nmagic); 5304 } 5305 5306 SPPP_UNLOCK(sp); 5307 } 5308 splx(s); 5309 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 5310 5311 SPPPQ_UNLOCK(); 5312 } 5313 5314 #ifdef INET 5315 /* 5316 * Get both IP addresses. 5317 */ 5318 static void 5319 sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, uint32_t *srcmask) 5320 { 5321 struct ifnet *ifp = &sp->pp_if; 5322 struct ifaddr *ifa; 5323 struct sockaddr_in *si, *sm; 5324 uint32_t ssrc, ddst; 5325 int s; 5326 struct psref psref; 5327 5328 sm = NULL; 5329 ssrc = ddst = 0; 5330 /* 5331 * Pick the first AF_INET address from the list, 5332 * aliases don't make any sense on a p2p link anyway. 5333 */ 5334 si = 0; 5335 s = pserialize_read_enter(); 5336 IFADDR_READER_FOREACH(ifa, ifp) { 5337 if (ifa->ifa_addr->sa_family == AF_INET) { 5338 si = (struct sockaddr_in *)ifa->ifa_addr; 5339 sm = (struct sockaddr_in *)ifa->ifa_netmask; 5340 if (si) { 5341 ifa_acquire(ifa, &psref); 5342 break; 5343 } 5344 } 5345 } 5346 pserialize_read_exit(s); 5347 if (ifa) { 5348 if (si && si->sin_addr.s_addr) { 5349 ssrc = si->sin_addr.s_addr; 5350 if (srcmask) 5351 *srcmask = ntohl(sm->sin_addr.s_addr); 5352 } 5353 5354 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 5355 if (si && si->sin_addr.s_addr) 5356 ddst = si->sin_addr.s_addr; 5357 ifa_release(ifa, &psref); 5358 } 5359 5360 if (dst) *dst = ntohl(ddst); 5361 if (src) *src = ntohl(ssrc); 5362 } 5363 5364 /* 5365 * Set IP addresses. Must be called at splnet. 5366 * If an address is 0, leave it the way it is. 5367 */ 5368 static void 5369 sppp_set_ip_addrs_work(struct work *wk, struct sppp *sp) 5370 { 5371 STDDCL; 5372 struct ifaddr *ifa; 5373 struct sockaddr_in *si, *dest; 5374 uint32_t myaddr = 0, hisaddr = 0; 5375 int s; 5376 5377 IFNET_LOCK(ifp); 5378 5379 /* 5380 * Pick the first AF_INET address from the list, 5381 * aliases don't make any sense on a p2p link anyway. 5382 */ 5383 si = dest = NULL; 5384 s = pserialize_read_enter(); 5385 IFADDR_READER_FOREACH(ifa, ifp) { 5386 if (ifa->ifa_addr->sa_family == AF_INET) { 5387 si = (struct sockaddr_in *)ifa->ifa_addr; 5388 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5389 break; 5390 } 5391 } 5392 pserialize_read_exit(s); 5393 5394 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 5395 myaddr = sp->ipcp.req_myaddr; 5396 else if (si != NULL) 5397 myaddr = ntohl(si->sin_addr.s_addr); 5398 5399 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 5400 hisaddr = sp->ipcp.req_hisaddr; 5401 else if (dest != NULL) 5402 hisaddr = ntohl(dest->sin_addr.s_addr); 5403 5404 if (si != NULL && dest != NULL) { 5405 int error; 5406 struct sockaddr_in new_sin = *si; 5407 struct sockaddr_in new_dst = *dest; 5408 5409 if (myaddr != 0) 5410 new_sin.sin_addr.s_addr = htonl(myaddr); 5411 if (hisaddr != 0) { 5412 new_dst.sin_addr.s_addr = htonl(hisaddr); 5413 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) 5414 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 5415 } 5416 5417 in_addrhash_remove(ifatoia(ifa)); 5418 5419 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5420 5421 in_addrhash_insert(ifatoia(ifa)); 5422 5423 if (debug && error) 5424 { 5425 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5426 ifp->if_xname, __func__, error); 5427 } 5428 if (!error) { 5429 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5430 } 5431 } 5432 5433 if (ifp->if_mtu > sp->lcp.their_mru) { 5434 sp->pp_saved_mtu = ifp->if_mtu; 5435 ifp->if_mtu = sp->lcp.their_mru; 5436 if (debug) 5437 log(LOG_DEBUG, 5438 "%s: setting MTU to %" PRIu64 " bytes\n", 5439 ifp->if_xname, ifp->if_mtu); 5440 } 5441 5442 IFNET_UNLOCK(ifp); 5443 5444 sppp_notify_con(sp); 5445 } 5446 5447 static void 5448 sppp_set_ip_addrs(struct sppp *sp) 5449 { 5450 struct ifnet *ifp = &sp->pp_if; 5451 5452 if (!pcq_put(sp->ipcp.update_addrs_q, (void *)IPCP_SET_ADDRS)) { 5453 log(LOG_WARNING, "%s: cannot enqueued, ignore sppp_clear_ip_addrs\n", 5454 ifp->if_xname); 5455 return; 5456 } 5457 5458 if (atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1) == 1) 5459 return; 5460 5461 workqueue_enqueue(sp->ipcp.update_addrs_wq, &sp->ipcp.update_addrs_wk, NULL); 5462 } 5463 5464 /* 5465 * Clear IP addresses. Must be called at splnet. 5466 */ 5467 static void 5468 sppp_clear_ip_addrs_work(struct work *wk, struct sppp *sp) 5469 { 5470 STDDCL; 5471 struct ifaddr *ifa; 5472 struct sockaddr_in *si, *dest; 5473 int s; 5474 5475 IFNET_LOCK(ifp); 5476 5477 /* 5478 * Pick the first AF_INET address from the list, 5479 * aliases don't make any sense on a p2p link anyway. 5480 */ 5481 si = dest = NULL; 5482 s = pserialize_read_enter(); 5483 IFADDR_READER_FOREACH(ifa, ifp) { 5484 if (ifa->ifa_addr->sa_family == AF_INET) { 5485 si = (struct sockaddr_in *)ifa->ifa_addr; 5486 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5487 break; 5488 } 5489 } 5490 pserialize_read_exit(s); 5491 5492 if (si != NULL) { 5493 struct sockaddr_in new_sin = *si; 5494 struct sockaddr_in new_dst = *dest; 5495 int error; 5496 5497 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 5498 new_sin.sin_addr.s_addr = 0; 5499 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 5500 new_dst.sin_addr.s_addr = sp->ipcp.saved_hisaddr; 5501 5502 in_addrhash_remove(ifatoia(ifa)); 5503 5504 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5505 5506 in_addrhash_insert(ifatoia(ifa)); 5507 5508 if (debug && error) 5509 { 5510 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5511 ifp->if_xname, __func__, error); 5512 } 5513 if (!error) { 5514 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5515 } 5516 } 5517 5518 if (sp->pp_saved_mtu > 0) { 5519 ifp->if_mtu = sp->pp_saved_mtu; 5520 sp->pp_saved_mtu = 0; 5521 if (debug) 5522 log(LOG_DEBUG, 5523 "%s: resetting MTU to %" PRIu64 " bytes\n", 5524 ifp->if_xname, ifp->if_mtu); 5525 } 5526 5527 IFNET_UNLOCK(ifp); 5528 } 5529 5530 static void 5531 sppp_clear_ip_addrs(struct sppp *sp) 5532 { 5533 struct ifnet *ifp = &sp->pp_if; 5534 5535 if (!pcq_put(sp->ipcp.update_addrs_q, (void *)IPCP_CLEAR_ADDRS)) { 5536 log(LOG_WARNING, "%s: cannot enqueued, ignore sppp_clear_ip_addrs\n", 5537 ifp->if_xname); 5538 return; 5539 } 5540 5541 if (atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1) == 1) 5542 return; 5543 5544 workqueue_enqueue(sp->ipcp.update_addrs_wq, &sp->ipcp.update_addrs_wk, NULL); 5545 } 5546 5547 static void 5548 sppp_update_ip_addrs_work(struct work *wk, void *arg) 5549 { 5550 struct sppp *sp = arg; 5551 void *work; 5552 5553 atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 0); 5554 5555 while ((work = pcq_get(sp->ipcp.update_addrs_q)) != NULL) { 5556 int update = (intptr_t)work; 5557 5558 if (update == IPCP_SET_ADDRS) 5559 sppp_set_ip_addrs_work(wk, sp); 5560 else if (update == IPCP_CLEAR_ADDRS) 5561 sppp_clear_ip_addrs_work(wk, sp); 5562 } 5563 } 5564 #endif 5565 5566 #ifdef INET6 5567 /* 5568 * Get both IPv6 addresses. 5569 */ 5570 static void 5571 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 5572 struct in6_addr *srcmask) 5573 { 5574 struct ifnet *ifp = &sp->pp_if; 5575 struct ifaddr *ifa; 5576 struct sockaddr_in6 *si, *sm; 5577 struct in6_addr ssrc, ddst; 5578 int s; 5579 struct psref psref; 5580 5581 sm = NULL; 5582 memset(&ssrc, 0, sizeof(ssrc)); 5583 memset(&ddst, 0, sizeof(ddst)); 5584 /* 5585 * Pick the first link-local AF_INET6 address from the list, 5586 * aliases don't make any sense on a p2p link anyway. 5587 */ 5588 si = 0; 5589 s = pserialize_read_enter(); 5590 IFADDR_READER_FOREACH(ifa, ifp) { 5591 if (ifa->ifa_addr->sa_family == AF_INET6) { 5592 si = (struct sockaddr_in6 *)ifa->ifa_addr; 5593 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 5594 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) { 5595 ifa_acquire(ifa, &psref); 5596 break; 5597 } 5598 } 5599 } 5600 pserialize_read_exit(s); 5601 5602 if (ifa) { 5603 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 5604 memcpy(&ssrc, &si->sin6_addr, sizeof(ssrc)); 5605 if (srcmask) { 5606 memcpy(srcmask, &sm->sin6_addr, 5607 sizeof(*srcmask)); 5608 } 5609 } 5610 5611 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 5612 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 5613 memcpy(&ddst, &si->sin6_addr, sizeof(ddst)); 5614 ifa_release(ifa, &psref); 5615 } 5616 5617 if (dst) 5618 memcpy(dst, &ddst, sizeof(*dst)); 5619 if (src) 5620 memcpy(src, &ssrc, sizeof(*src)); 5621 } 5622 5623 #ifdef IPV6CP_MYIFID_DYN 5624 /* 5625 * Generate random ifid. 5626 */ 5627 static void 5628 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 5629 { 5630 /* TBD */ 5631 } 5632 5633 /* 5634 * Set my IPv6 address. Must be called at splnet. 5635 */ 5636 static void 5637 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 5638 { 5639 STDDCL; 5640 struct ifaddr *ifa; 5641 struct sockaddr_in6 *sin6; 5642 int s; 5643 struct psref psref; 5644 5645 IFNET_LOCK(ifp); 5646 5647 /* 5648 * Pick the first link-local AF_INET6 address from the list, 5649 * aliases don't make any sense on a p2p link anyway. 5650 */ 5651 5652 sin6 = NULL; 5653 s = pserialize_read_enter(); 5654 IFADDR_READER_FOREACH(ifa, ifp) 5655 { 5656 if (ifa->ifa_addr->sa_family == AF_INET6) 5657 { 5658 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 5659 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 5660 ifa_acquire(ifa, &psref); 5661 break; 5662 } 5663 } 5664 } 5665 pserialize_read_exit(s); 5666 5667 if (ifa && sin6) 5668 { 5669 int error; 5670 struct sockaddr_in6 new_sin6 = *sin6; 5671 5672 memcpy(&new_sin6.sin6_addr, src, sizeof(new_sin6.sin6_addr)); 5673 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 5674 if (debug && error) 5675 { 5676 log(LOG_DEBUG, "%s: %s: in6_ifinit failed, error=%d\n", 5677 ifp->if_xname, __func__, error); 5678 } 5679 if (!error) { 5680 pfil_run_addrhooks(if_pfil, SIOCAIFADDR_IN6, ifa); 5681 } 5682 ifa_release(ifa, &psref); 5683 } 5684 5685 IFNET_UNLOCK(ifp); 5686 } 5687 #endif 5688 5689 /* 5690 * Suggest a candidate address to be used by peer. 5691 */ 5692 static void 5693 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 5694 { 5695 struct in6_addr myaddr; 5696 struct timeval tv; 5697 5698 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 5699 5700 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 5701 microtime(&tv); 5702 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 5703 myaddr.s6_addr[14] ^= 0xff; 5704 myaddr.s6_addr[15] ^= 0xff; 5705 } else { 5706 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 5707 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 5708 } 5709 if (suggest) 5710 memcpy(suggest, &myaddr, sizeof(myaddr)); 5711 } 5712 #endif /*INET6*/ 5713 5714 /* 5715 * Process ioctl requests specific to the PPP interface. 5716 * Permissions have already been checked. 5717 */ 5718 static int 5719 sppp_params(struct sppp *sp, u_long cmd, void *data) 5720 { 5721 switch (cmd) { 5722 case SPPPGETAUTHCFG: 5723 { 5724 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5725 int error; 5726 size_t len; 5727 5728 SPPP_LOCK(sp, RW_READER); 5729 5730 cfg->myauthflags = sp->myauth.flags; 5731 cfg->hisauthflags = sp->hisauth.flags; 5732 strlcpy(cfg->ifname, sp->pp_if.if_xname, sizeof(cfg->ifname)); 5733 cfg->hisauth = 0; 5734 if (sp->hisauth.proto) 5735 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5736 cfg->myauth = 0; 5737 if (sp->myauth.proto) 5738 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5739 if (cfg->myname_length == 0) { 5740 if (sp->myauth.name != NULL) 5741 cfg->myname_length = sp->myauth.name_len + 1; 5742 } else { 5743 if (sp->myauth.name == NULL) { 5744 cfg->myname_length = 0; 5745 } else { 5746 len = sp->myauth.name_len + 1; 5747 5748 5749 if (cfg->myname_length < len) { 5750 SPPP_UNLOCK(sp); 5751 return (ENAMETOOLONG); 5752 } 5753 error = copyout(sp->myauth.name, cfg->myname, len); 5754 if (error) { 5755 SPPP_UNLOCK(sp); 5756 return error; 5757 } 5758 } 5759 } 5760 if (cfg->hisname_length == 0) { 5761 if (sp->hisauth.name != NULL) 5762 cfg->hisname_length = sp->hisauth.name_len + 1; 5763 } else { 5764 if (sp->hisauth.name == NULL) { 5765 cfg->hisname_length = 0; 5766 } else { 5767 len = sp->hisauth.name_len + 1; 5768 5769 if (cfg->hisname_length < len) { 5770 SPPP_UNLOCK(sp); 5771 return (ENAMETOOLONG); 5772 } 5773 error = copyout(sp->hisauth.name, cfg->hisname, len); 5774 if (error) { 5775 SPPP_UNLOCK(sp); 5776 return error; 5777 } 5778 } 5779 } 5780 SPPP_UNLOCK(sp); 5781 } 5782 break; 5783 case SPPPSETAUTHCFG: 5784 { 5785 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5786 int error; 5787 5788 SPPP_LOCK(sp, RW_WRITER); 5789 5790 if (sp->myauth.name) { 5791 free(sp->myauth.name, M_DEVBUF); 5792 sp->myauth.name = NULL; 5793 } 5794 if (sp->myauth.secret) { 5795 free(sp->myauth.secret, M_DEVBUF); 5796 sp->myauth.secret = NULL; 5797 } 5798 if (sp->hisauth.name) { 5799 free(sp->hisauth.name, M_DEVBUF); 5800 sp->hisauth.name = NULL; 5801 } 5802 if (sp->hisauth.secret) { 5803 free(sp->hisauth.secret, M_DEVBUF); 5804 sp->hisauth.secret = NULL; 5805 } 5806 5807 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5808 if (cfg->hisname_length >= MCLBYTES) { 5809 SPPP_UNLOCK(sp); 5810 return (ENAMETOOLONG); 5811 } 5812 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5813 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5814 if (error) { 5815 free(sp->hisauth.name, M_DEVBUF); 5816 sp->hisauth.name = NULL; 5817 SPPP_UNLOCK(sp); 5818 return error; 5819 } 5820 sp->hisauth.name_len = cfg->hisname_length - 1; 5821 sp->hisauth.name[sp->hisauth.name_len] = 0; 5822 } 5823 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5824 if (cfg->hissecret_length >= MCLBYTES) { 5825 SPPP_UNLOCK(sp); 5826 return (ENAMETOOLONG); 5827 } 5828 sp->hisauth.secret = malloc(cfg->hissecret_length, 5829 M_DEVBUF, M_WAITOK); 5830 error = copyin(cfg->hissecret, sp->hisauth.secret, 5831 cfg->hissecret_length); 5832 if (error) { 5833 free(sp->hisauth.secret, M_DEVBUF); 5834 sp->hisauth.secret = NULL; 5835 SPPP_UNLOCK(sp); 5836 return error; 5837 } 5838 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5839 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5840 } 5841 if (cfg->myname != NULL && cfg->myname_length > 0) { 5842 if (cfg->myname_length >= MCLBYTES) { 5843 SPPP_UNLOCK(sp); 5844 return (ENAMETOOLONG); 5845 } 5846 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5847 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5848 if (error) { 5849 free(sp->myauth.name, M_DEVBUF); 5850 sp->myauth.name = NULL; 5851 SPPP_UNLOCK(sp); 5852 return error; 5853 } 5854 sp->myauth.name_len = cfg->myname_length - 1; 5855 sp->myauth.name[sp->myauth.name_len] = 0; 5856 } 5857 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5858 if (cfg->mysecret_length >= MCLBYTES) { 5859 SPPP_UNLOCK(sp); 5860 return (ENAMETOOLONG); 5861 } 5862 sp->myauth.secret = malloc(cfg->mysecret_length, 5863 M_DEVBUF, M_WAITOK); 5864 error = copyin(cfg->mysecret, sp->myauth.secret, 5865 cfg->mysecret_length); 5866 if (error) { 5867 free(sp->myauth.secret, M_DEVBUF); 5868 sp->myauth.secret = NULL; 5869 SPPP_UNLOCK(sp); 5870 return error; 5871 } 5872 sp->myauth.secret_len = cfg->mysecret_length - 1; 5873 sp->myauth.secret[sp->myauth.secret_len] = 0; 5874 } 5875 sp->myauth.flags = cfg->myauthflags; 5876 if (cfg->myauth) 5877 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5878 sp->hisauth.flags = cfg->hisauthflags; 5879 if (cfg->hisauth) 5880 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5881 sp->pp_auth_failures = 0; 5882 if (sp->hisauth.proto != 0) 5883 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 5884 else 5885 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 5886 5887 SPPP_UNLOCK(sp); 5888 } 5889 break; 5890 case SPPPGETLCPCFG: 5891 { 5892 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5893 5894 SPPP_LOCK(sp, RW_READER); 5895 lcpp->lcp_timeout = sp->lcp.timeout; 5896 SPPP_UNLOCK(sp); 5897 } 5898 break; 5899 case SPPPSETLCPCFG: 5900 { 5901 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5902 5903 SPPP_LOCK(sp, RW_WRITER); 5904 sp->lcp.timeout = lcpp->lcp_timeout; 5905 SPPP_UNLOCK(sp); 5906 } 5907 break; 5908 case SPPPGETSTATUS: 5909 { 5910 struct spppstatus *status = (struct spppstatus *)data; 5911 5912 SPPP_LOCK(sp, RW_READER); 5913 status->phase = sp->pp_phase; 5914 SPPP_UNLOCK(sp); 5915 } 5916 break; 5917 case SPPPGETSTATUSNCP: 5918 { 5919 struct spppstatusncp *status = (struct spppstatusncp *)data; 5920 5921 SPPP_LOCK(sp, RW_READER); 5922 status->phase = sp->pp_phase; 5923 status->ncpup = sppp_cp_check(sp, CP_NCP); 5924 SPPP_UNLOCK(sp); 5925 } 5926 break; 5927 case SPPPGETIDLETO: 5928 { 5929 struct spppidletimeout *to = (struct spppidletimeout *)data; 5930 5931 SPPP_LOCK(sp, RW_READER); 5932 to->idle_seconds = sp->pp_idle_timeout; 5933 SPPP_UNLOCK(sp); 5934 } 5935 break; 5936 case SPPPSETIDLETO: 5937 { 5938 struct spppidletimeout *to = (struct spppidletimeout *)data; 5939 5940 SPPP_LOCK(sp, RW_WRITER); 5941 sp->pp_idle_timeout = to->idle_seconds; 5942 SPPP_UNLOCK(sp); 5943 } 5944 break; 5945 case SPPPSETAUTHFAILURE: 5946 { 5947 struct spppauthfailuresettings *afsettings = 5948 (struct spppauthfailuresettings *)data; 5949 5950 SPPP_LOCK(sp, RW_WRITER); 5951 sp->pp_max_auth_fail = afsettings->max_failures; 5952 sp->pp_auth_failures = 0; 5953 SPPP_UNLOCK(sp); 5954 } 5955 break; 5956 case SPPPGETAUTHFAILURES: 5957 { 5958 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5959 5960 SPPP_LOCK(sp, RW_READER); 5961 stats->auth_failures = sp->pp_auth_failures; 5962 stats->max_failures = sp->pp_max_auth_fail; 5963 SPPP_UNLOCK(sp); 5964 } 5965 break; 5966 case SPPPSETDNSOPTS: 5967 { 5968 struct spppdnssettings *req = (struct spppdnssettings *)data; 5969 5970 SPPP_LOCK(sp, RW_WRITER); 5971 sp->query_dns = req->query_dns & 3; 5972 SPPP_UNLOCK(sp); 5973 } 5974 break; 5975 case SPPPGETDNSOPTS: 5976 { 5977 struct spppdnssettings *req = (struct spppdnssettings *)data; 5978 5979 SPPP_LOCK(sp, RW_READER); 5980 req->query_dns = sp->query_dns; 5981 SPPP_UNLOCK(sp); 5982 } 5983 break; 5984 case SPPPGETDNSADDRS: 5985 { 5986 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; 5987 5988 SPPP_LOCK(sp, RW_READER); 5989 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5990 SPPP_UNLOCK(sp); 5991 } 5992 break; 5993 case SPPPGETKEEPALIVE: 5994 { 5995 struct spppkeepalivesettings *settings = 5996 (struct spppkeepalivesettings*)data; 5997 5998 SPPP_LOCK(sp, RW_READER); 5999 settings->maxalive = sp->pp_maxalive; 6000 settings->max_noreceive = sp->pp_max_noreceive; 6001 SPPP_UNLOCK(sp); 6002 } 6003 break; 6004 case SPPPSETKEEPALIVE: 6005 { 6006 struct spppkeepalivesettings *settings = 6007 (struct spppkeepalivesettings*)data; 6008 6009 SPPP_LOCK(sp, RW_WRITER); 6010 sp->pp_maxalive = settings->maxalive; 6011 sp->pp_max_noreceive = settings->max_noreceive; 6012 SPPP_UNLOCK(sp); 6013 } 6014 break; 6015 default: 6016 { 6017 int ret; 6018 6019 MODULE_HOOK_CALL(sppp_params_50_hook, (sp, cmd, data), 6020 enosys(), ret); 6021 if (ret != ENOSYS) 6022 return ret; 6023 return (EINVAL); 6024 } 6025 } 6026 return (0); 6027 } 6028 6029 static void 6030 sppp_phase_network(struct sppp *sp) 6031 { 6032 int i; 6033 6034 KASSERT(SPPP_WLOCKED(sp)); 6035 6036 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 6037 6038 /* Notify NCPs now. */ 6039 for (i = 0; i < IDX_COUNT; i++) 6040 if ((cps[i])->flags & CP_NCP) 6041 sppp_wq_add(sp->wq_cp, &sp->scp[i].work_open); 6042 } 6043 6044 static const char * 6045 sppp_cp_type_name(u_char type) 6046 { 6047 static char buf[12]; 6048 switch (type) { 6049 case CONF_REQ: return "conf-req"; 6050 case CONF_ACK: return "conf-ack"; 6051 case CONF_NAK: return "conf-nak"; 6052 case CONF_REJ: return "conf-rej"; 6053 case TERM_REQ: return "term-req"; 6054 case TERM_ACK: return "term-ack"; 6055 case CODE_REJ: return "code-rej"; 6056 case PROTO_REJ: return "proto-rej"; 6057 case ECHO_REQ: return "echo-req"; 6058 case ECHO_REPLY: return "echo-reply"; 6059 case DISC_REQ: return "discard-req"; 6060 } 6061 snprintf(buf, sizeof(buf), "0x%x", type); 6062 return buf; 6063 } 6064 6065 static const char * 6066 sppp_auth_type_name(u_short proto, u_char type) 6067 { 6068 static char buf[32]; 6069 const char *name; 6070 6071 switch (proto) { 6072 case PPP_CHAP: 6073 switch (type) { 6074 case CHAP_CHALLENGE: return "challenge"; 6075 case CHAP_RESPONSE: return "response"; 6076 case CHAP_SUCCESS: return "success"; 6077 case CHAP_FAILURE: return "failure"; 6078 default: name = "chap"; break; 6079 } 6080 break; 6081 6082 case PPP_PAP: 6083 switch (type) { 6084 case PAP_REQ: return "req"; 6085 case PAP_ACK: return "ack"; 6086 case PAP_NAK: return "nak"; 6087 default: name = "pap"; break; 6088 } 6089 break; 6090 6091 default: 6092 name = "bad"; 6093 break; 6094 } 6095 6096 snprintf(buf, sizeof(buf), "%s(%#x) %#x", name, proto, type); 6097 return buf; 6098 } 6099 6100 static const char * 6101 sppp_lcp_opt_name(u_char opt) 6102 { 6103 static char buf[12]; 6104 switch (opt) { 6105 case LCP_OPT_MRU: return "mru"; 6106 case LCP_OPT_ASYNC_MAP: return "async-map"; 6107 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 6108 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 6109 case LCP_OPT_MAGIC: return "magic"; 6110 case LCP_OPT_PROTO_COMP: return "proto-comp"; 6111 case LCP_OPT_ADDR_COMP: return "addr-comp"; 6112 case LCP_OPT_SELF_DESC_PAD: return "sdpad"; 6113 case LCP_OPT_CALL_BACK: return "callback"; 6114 case LCP_OPT_COMPOUND_FRMS: return "cmpd-frms"; 6115 case LCP_OPT_MP_MRRU: return "mrru"; 6116 case LCP_OPT_MP_SSNHF: return "mp-ssnhf"; 6117 case LCP_OPT_MP_EID: return "mp-eid"; 6118 } 6119 snprintf(buf, sizeof(buf), "0x%x", opt); 6120 return buf; 6121 } 6122 6123 static const char * 6124 sppp_ipcp_opt_name(u_char opt) 6125 { 6126 static char buf[12]; 6127 switch (opt) { 6128 case IPCP_OPT_ADDRESSES: return "addresses"; 6129 case IPCP_OPT_COMPRESSION: return "compression"; 6130 case IPCP_OPT_ADDRESS: return "address"; 6131 } 6132 snprintf(buf, sizeof(buf), "0x%x", opt); 6133 return buf; 6134 } 6135 6136 #ifdef INET6 6137 static const char * 6138 sppp_ipv6cp_opt_name(u_char opt) 6139 { 6140 static char buf[12]; 6141 switch (opt) { 6142 case IPV6CP_OPT_IFID: return "ifid"; 6143 case IPV6CP_OPT_COMPRESSION: return "compression"; 6144 } 6145 snprintf(buf, sizeof(buf), "0x%x", opt); 6146 return buf; 6147 } 6148 #endif 6149 6150 static const char * 6151 sppp_state_name(int state) 6152 { 6153 switch (state) { 6154 case STATE_INITIAL: return "initial"; 6155 case STATE_STARTING: return "starting"; 6156 case STATE_CLOSED: return "closed"; 6157 case STATE_STOPPED: return "stopped"; 6158 case STATE_CLOSING: return "closing"; 6159 case STATE_STOPPING: return "stopping"; 6160 case STATE_REQ_SENT: return "req-sent"; 6161 case STATE_ACK_RCVD: return "ack-rcvd"; 6162 case STATE_ACK_SENT: return "ack-sent"; 6163 case STATE_OPENED: return "opened"; 6164 } 6165 return "illegal"; 6166 } 6167 6168 static const char * 6169 sppp_phase_name(int phase) 6170 { 6171 switch (phase) { 6172 case SPPP_PHASE_DEAD: return "dead"; 6173 case SPPP_PHASE_ESTABLISH: return "establish"; 6174 case SPPP_PHASE_TERMINATE: return "terminate"; 6175 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 6176 case SPPP_PHASE_NETWORK: return "network"; 6177 } 6178 return "illegal"; 6179 } 6180 6181 static const char * 6182 sppp_proto_name(u_short proto) 6183 { 6184 static char buf[12]; 6185 switch (proto) { 6186 case PPP_LCP: return "lcp"; 6187 case PPP_IPCP: return "ipcp"; 6188 case PPP_PAP: return "pap"; 6189 case PPP_CHAP: return "chap"; 6190 case PPP_IPV6CP: return "ipv6cp"; 6191 } 6192 snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto); 6193 return buf; 6194 } 6195 6196 static void 6197 sppp_print_bytes(const u_char *p, u_short len) 6198 { 6199 addlog(" %02x", *p++); 6200 while (--len > 0) 6201 addlog("-%02x", *p++); 6202 } 6203 6204 static void 6205 sppp_print_string(const char *p, u_short len) 6206 { 6207 u_char c; 6208 6209 while (len-- > 0) { 6210 c = *p++; 6211 /* 6212 * Print only ASCII chars directly. RFC 1994 recommends 6213 * using only them, but we don't rely on it. */ 6214 if (c < ' ' || c > '~') 6215 addlog("\\x%x", c); 6216 else 6217 addlog("%c", c); 6218 } 6219 } 6220 6221 static const char * 6222 sppp_dotted_quad(uint32_t addr) 6223 { 6224 static char s[16]; 6225 snprintf(s, sizeof(s), "%d.%d.%d.%d", 6226 (int)((addr >> 24) & 0xff), 6227 (int)((addr >> 16) & 0xff), 6228 (int)((addr >> 8) & 0xff), 6229 (int)(addr & 0xff)); 6230 return s; 6231 } 6232 6233 /* a dummy, used to drop uninteresting events */ 6234 static void 6235 sppp_null(struct sppp *unused) 6236 { 6237 /* do just nothing */ 6238 } 6239 6240 static void 6241 sppp_tls(const struct cp *cp, struct sppp *sp) 6242 { 6243 6244 /* notify lcp that is lower layer */ 6245 sp->lcp.protos |= (1 << cp->protoidx); 6246 6247 if (sp->scp[IDX_LCP].state == STATE_OPENED) 6248 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_up); 6249 } 6250 6251 static void 6252 sppp_tlf(const struct cp *cp, struct sppp *sp) 6253 { 6254 STDDCL; 6255 6256 if (debug) 6257 log(LOG_DEBUG, "%s: %s tlf\n", ifp->if_xname, cp->name); 6258 6259 /* notify lcp that is lower layer */ 6260 sp->lcp.protos &= ~(1 << cp->protoidx); 6261 6262 /* cleanup */ 6263 if (sp->scp[cp->protoidx].rcr_buf != NULL) { 6264 kmem_free(sp->scp[cp->protoidx].rcr_buf, 6265 sp->scp[cp->protoidx].rcr_blen); 6266 } 6267 6268 sp->scp[cp->protoidx].rcr_buf = NULL; 6269 sp->scp[cp->protoidx].rcr_blen = 0; 6270 sp->scp[cp->protoidx].rcr_rlen = 0; 6271 6272 sppp_lcp_check_and_close(sp); 6273 } 6274 6275 static void 6276 sppp_sca_scn(const struct cp *cp, struct sppp *sp) 6277 { 6278 STDDCL; 6279 u_char rconfid, type, rlen; 6280 void *buf; 6281 size_t blen; 6282 6283 rconfid = sp->scp[cp->protoidx].rconfid; 6284 type = sp->scp[cp->protoidx].rcr_type; 6285 buf = sp->scp[cp->protoidx].rcr_buf; 6286 rlen = sp->scp[cp->protoidx].rcr_rlen; 6287 blen = sp->scp[cp->protoidx].rcr_blen; 6288 6289 sp->scp[cp->protoidx].rcr_buf = NULL; 6290 sp->scp[cp->protoidx].rcr_blen = 0; 6291 6292 if (buf != NULL) { 6293 if (rlen > 0) { 6294 if (debug) { 6295 log(LOG_DEBUG, "%s: send %s\n", 6296 ifp->if_xname, sppp_cp_type_name(type)); 6297 } 6298 sppp_cp_send(sp, cp->proto, type, rconfid, rlen, buf); 6299 } 6300 kmem_free(buf, blen); 6301 } 6302 } 6303 6304 static void 6305 sppp_ifdown(struct sppp *sp, void *xcp __unused) 6306 { 6307 6308 SPPP_UNLOCK(sp); 6309 if_down(&sp->pp_if); 6310 IF_PURGE(&sp->pp_cpq); 6311 SPPP_LOCK(sp, RW_WRITER); 6312 } 6313 6314 /* 6315 * This file is large. Tell emacs to highlight it nevertheless. 6316 * 6317 * Local Variables: 6318 * hilit-auto-highlight-maxout: 120000 6319 * End: 6320 */ 6321 6322 /* 6323 * Module glue 6324 */ 6325 MODULE(MODULE_CLASS_MISC, sppp_subr, NULL); 6326 6327 static int 6328 sppp_subr_modcmd(modcmd_t cmd, void *arg) 6329 { 6330 switch (cmd) { 6331 case MODULE_CMD_INIT: 6332 case MODULE_CMD_FINI: 6333 return 0; 6334 case MODULE_CMD_STAT: 6335 case MODULE_CMD_AUTOUNLOAD: 6336 default: 6337 return ENOTTY; 6338 } 6339 } 6340 6341 static void 6342 sppp_notify_up(struct sppp *sp) 6343 { 6344 6345 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_up); 6346 } 6347 6348 static void 6349 sppp_notify_down(struct sppp *sp) 6350 { 6351 6352 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_down); 6353 } 6354 6355 static void 6356 sppp_notify_tls_wlocked(struct sppp *sp) 6357 { 6358 6359 KASSERT(SPPP_WLOCKED(sp)); 6360 6361 if (!sp->pp_tls) 6362 return; 6363 6364 SPPP_UNLOCK(sp); 6365 sp->pp_tls(sp); 6366 SPPP_LOCK(sp, RW_WRITER); 6367 } 6368 6369 static void 6370 sppp_notify_tlf_wlocked(struct sppp *sp) 6371 { 6372 6373 KASSERT(SPPP_WLOCKED(sp)); 6374 6375 if (!sp->pp_tlf) 6376 return; 6377 6378 SPPP_UNLOCK(sp); 6379 sp->pp_tlf(sp); 6380 SPPP_LOCK(sp, RW_WRITER); 6381 } 6382 6383 static void 6384 sppp_notify_con(struct sppp *sp) 6385 { 6386 6387 if (!sp->pp_con) 6388 return; 6389 6390 sp->pp_con(sp); 6391 } 6392 6393 #ifdef INET6 6394 static void 6395 sppp_notify_con_wlocked(struct sppp *sp) 6396 { 6397 6398 KASSERT(SPPP_WLOCKED(sp)); 6399 6400 SPPP_UNLOCK(sp); 6401 sppp_notify_con(sp); 6402 SPPP_LOCK(sp, RW_WRITER); 6403 6404 } 6405 #endif 6406 6407 static void 6408 sppp_notify_chg_wlocked(struct sppp *sp) 6409 { 6410 6411 KASSERT(SPPP_WLOCKED(sp)); 6412 6413 if (!sp->pp_chg) 6414 return; 6415 6416 SPPP_UNLOCK(sp); 6417 sp->pp_chg(sp, sp->pp_phase); 6418 SPPP_LOCK(sp, RW_WRITER); 6419 } 6420 6421 static void 6422 sppp_wq_work(struct work *wk, void *xsp) 6423 { 6424 struct sppp *sp; 6425 struct sppp_work *work; 6426 6427 sp = xsp; 6428 work = container_of(wk, struct sppp_work, work); 6429 atomic_cas_uint(&work->state, SPPP_WK_BUSY, SPPP_WK_FREE); 6430 6431 SPPP_LOCK(sp, RW_WRITER); 6432 work->func(sp, work->arg); 6433 SPPP_UNLOCK(sp); 6434 } 6435 6436 static struct workqueue * 6437 sppp_wq_create(struct sppp *sp, const char *xnamebuf, pri_t prio, int ipl, int flags) 6438 { 6439 struct workqueue *wq; 6440 int error; 6441 6442 error = workqueue_create(&wq, xnamebuf, sppp_wq_work, 6443 (void *)sp, prio, ipl, flags); 6444 if (error) { 6445 panic("%s: workqueue_create failed [%s, %d]\n", 6446 sp->pp_if.if_xname, xnamebuf, error); 6447 } 6448 6449 return wq; 6450 } 6451 6452 static void 6453 sppp_wq_destroy(struct sppp *sp __unused, struct workqueue *wq) 6454 { 6455 6456 workqueue_destroy(wq); 6457 } 6458 6459 static void 6460 sppp_wq_set(struct sppp_work *work, 6461 void (*func)(struct sppp *, void *), void *arg) 6462 { 6463 6464 work->func = func; 6465 work->arg = arg; 6466 } 6467 6468 static void 6469 sppp_wq_add(struct workqueue *wq, struct sppp_work *work) 6470 { 6471 6472 if (atomic_cas_uint(&work->state, SPPP_WK_FREE, SPPP_WK_BUSY) 6473 != SPPP_WK_FREE) 6474 return; 6475 6476 KASSERT(work->func != NULL); 6477 kpreempt_disable(); 6478 workqueue_enqueue(wq, &work->work, NULL); 6479 kpreempt_enable(); 6480 } 6481 static void 6482 sppp_wq_wait(struct workqueue *wq, struct sppp_work *work) 6483 { 6484 6485 atomic_swap_uint(&work->state, SPPP_WK_UNAVAIL); 6486 workqueue_wait(wq, &work->work); 6487 } 6488
Indexes created Tue Oct 14 00:09:49 GMT 2025