if_spppsubr.c revision 1.202
1 /* $NetBSD: if_spppsubr.c,v 1.202 2020/11/25 09:55:01 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 1.202 2020/11/25 09:55:01 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 for (i = 0; i < IDX_COUNT; i++) 3040 if ((cps[i])->flags & CP_QUAL) { 3041 (cps[i])->Open(sp, __UNCONST(&cps[i])); 3042 } 3043 3044 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 3045 (sp->pp_flags & PP_NEEDAUTH) != 0) 3046 sppp_change_phase(sp, SPPP_PHASE_AUTHENTICATE); 3047 else 3048 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 3049 3050 /* 3051 * Open all authentication protocols. This is even required 3052 * if we already proceeded to network phase, since it might be 3053 * that remote wants us to authenticate, so we might have to 3054 * send a PAP request. Undesired authentication protocols 3055 * don't do anything when they get an Open event. 3056 */ 3057 for (i = 0; i < IDX_COUNT; i++) 3058 if ((cps[i])->flags & CP_AUTH) { 3059 sppp_wq_add(sp->wq_cp, 3060 &sp->scp[(cps[i])->protoidx].work_open); 3061 } 3062 3063 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 3064 /* Notify all NCPs. */ 3065 for (i = 0; i < IDX_COUNT; i++) 3066 if ((cps[i])->flags & CP_NCP) { 3067 sppp_wq_add(sp->wq_cp, 3068 &sp->scp[(cps[i])->protoidx].work_open); 3069 } 3070 } 3071 3072 /* notify low-level driver of state change */ 3073 sppp_notify_chg_wlocked(sp); 3074 } 3075 3076 static void 3077 sppp_lcp_tld(struct sppp *sp) 3078 { 3079 int i, pi, phase; 3080 3081 KASSERT(SPPP_WLOCKED(sp)); 3082 3083 phase = sp->pp_phase; 3084 3085 sppp_change_phase(sp, SPPP_PHASE_TERMINATE); 3086 3087 /* 3088 * Take upper layers down. We send the Down event first and 3089 * the Close second to prevent the upper layers from sending 3090 * ``a flurry of terminate-request packets'', as the RFC 3091 * describes it. 3092 */ 3093 for (i = 0; i < IDX_COUNT; i++) { 3094 pi = (cps[i])->protoidx; 3095 if (((cps[i])->flags & CP_LCP) == 0) { 3096 /* skip if ncp was not started */ 3097 if (phase != SPPP_PHASE_NETWORK && 3098 ((cps[i])->flags & CP_NCP) != 0) 3099 continue; 3100 3101 sppp_wq_add(sp->wq_cp, &sp->scp[pi].work_down); 3102 sppp_wq_add(sp->wq_cp, &sp->scp[pi].work_close); 3103 } 3104 } 3105 } 3106 3107 static void 3108 sppp_lcp_tls(const struct cp *cp __unused, struct sppp *sp) 3109 { 3110 3111 KASSERT(SPPP_WLOCKED(sp)); 3112 3113 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 3114 printf("%s: authentication failed %d times, not retrying again\n", 3115 sp->pp_if.if_xname, sp->pp_auth_failures); 3116 3117 SPPP_UNLOCK(sp); 3118 if_down(&sp->pp_if); 3119 SPPP_LOCK(sp, RW_WRITER); 3120 return; 3121 } 3122 3123 sppp_change_phase(sp, SPPP_PHASE_ESTABLISH); 3124 3125 /* Notify lower layer if desired. */ 3126 sppp_notify_tls_wlocked(sp); 3127 } 3128 3129 static void 3130 sppp_lcp_tlf(const struct cp *cp __unused, struct sppp *sp) 3131 { 3132 3133 KASSERT(SPPP_WLOCKED(sp)); 3134 3135 sppp_change_phase(sp, SPPP_PHASE_DEAD); 3136 3137 /* Notify lower layer if desired. */ 3138 sppp_notify_tlf_wlocked(sp); 3139 } 3140 3141 static void 3142 sppp_lcp_scr(struct sppp *sp) 3143 { 3144 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 3145 int i = 0; 3146 u_short authproto; 3147 3148 KASSERT(SPPP_WLOCKED(sp)); 3149 3150 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 3151 if (! sp->lcp.magic) 3152 sp->lcp.magic = cprng_fast32(); 3153 opt[i++] = LCP_OPT_MAGIC; 3154 opt[i++] = 6; 3155 opt[i++] = sp->lcp.magic >> 24; 3156 opt[i++] = sp->lcp.magic >> 16; 3157 opt[i++] = sp->lcp.magic >> 8; 3158 opt[i++] = sp->lcp.magic; 3159 } 3160 3161 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 3162 opt[i++] = LCP_OPT_MRU; 3163 opt[i++] = 4; 3164 opt[i++] = sp->lcp.mru >> 8; 3165 opt[i++] = sp->lcp.mru; 3166 } 3167 3168 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 3169 authproto = sp->hisauth.proto; 3170 opt[i++] = LCP_OPT_AUTH_PROTO; 3171 opt[i++] = authproto == PPP_CHAP? 5: 4; 3172 opt[i++] = authproto >> 8; 3173 opt[i++] = authproto; 3174 if (authproto == PPP_CHAP) 3175 opt[i++] = CHAP_MD5; 3176 } 3177 3178 sp->scp[IDX_LCP].confid = ++sp->scp[IDX_LCP].seq; 3179 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->scp[IDX_LCP].confid, i, &opt); 3180 } 3181 3182 /* 3183 * Check the open NCPs, return true if at least one NCP is open. 3184 */ 3185 3186 static int 3187 sppp_cp_check(struct sppp *sp, u_char cp_flags) 3188 { 3189 int i, mask; 3190 3191 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 3192 if ((sp->lcp.protos & mask) && (cps[i])->flags & cp_flags) 3193 return 1; 3194 return 0; 3195 } 3196 3197 /* 3198 * Re-check the open NCPs and see if we should terminate the link. 3199 * Called by the NCPs during their tlf action handling. 3200 */ 3201 static void 3202 sppp_lcp_check_and_close(struct sppp *sp) 3203 { 3204 3205 KASSERT(SPPP_WLOCKED(sp)); 3206 3207 if (sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 3208 /* don't bother, we are already going down */ 3209 return; 3210 } 3211 3212 if (sp->pp_phase == SPPP_PHASE_AUTHENTICATE && 3213 sppp_cp_check(sp, CP_AUTH)) 3214 return; 3215 3216 if (sp->pp_phase >= SPPP_PHASE_NETWORK && 3217 sppp_cp_check(sp, CP_NCP)) 3218 return; 3219 3220 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3221 } 3222 3223 /* 3224 *--------------------------------------------------------------------------* 3225 * * 3226 * The IPCP implementation. * 3227 * * 3228 *--------------------------------------------------------------------------* 3229 */ 3230 3231 static void 3232 sppp_ipcp_init(struct sppp *sp) 3233 { 3234 int error; 3235 3236 KASSERT(SPPP_WLOCKED(sp)); 3237 3238 sp->ipcp.opts = 0; 3239 sp->ipcp.flags = 0; 3240 sp->scp[IDX_IPCP].state = STATE_INITIAL; 3241 sp->scp[IDX_IPCP].fail_counter = 0; 3242 sp->scp[IDX_IPCP].seq = 0; 3243 sp->scp[IDX_IPCP].rseq = 0; 3244 sppp_cp_init(&ipcp, sp); 3245 3246 error = workqueue_create(&sp->ipcp.update_addrs_wq, "ipcp_addr", 3247 sppp_update_ip_addrs_work, sp, PRI_SOFTNET, IPL_NET, 0); 3248 if (error) 3249 panic("%s: update_addrs workqueue_create failed (%d)\n", 3250 __func__, error); 3251 sp->ipcp.update_addrs_q = pcq_create(IPCP_UPDATE_LIMIT, KM_SLEEP); 3252 3253 sp->ipcp.update_addrs_enqueued = 0; 3254 } 3255 3256 static void 3257 sppp_ipcp_open(struct sppp *sp, void *xcp) 3258 { 3259 STDDCL; 3260 uint32_t myaddr, hisaddr; 3261 3262 KASSERT(SPPP_WLOCKED(sp)); 3263 3264 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 3265 sp->ipcp.req_myaddr = 0; 3266 sp->ipcp.req_hisaddr = 0; 3267 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 3268 3269 #ifdef INET 3270 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3271 #else 3272 myaddr = hisaddr = 0; 3273 #endif 3274 /* 3275 * If we don't have his address, this probably means our 3276 * interface doesn't want to talk IP at all. (This could 3277 * be the case if somebody wants to speak only IPX, for 3278 * example.) Don't open IPCP in this case. 3279 */ 3280 if (hisaddr == 0) { 3281 /* XXX this message should go away */ 3282 if (debug) 3283 log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n", 3284 ifp->if_xname); 3285 return; 3286 } 3287 3288 if (myaddr == 0) { 3289 /* 3290 * I don't have an assigned address, so i need to 3291 * negotiate my address. 3292 */ 3293 sp->ipcp.flags |= IPCP_MYADDR_DYN; 3294 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3295 } 3296 if (hisaddr == 1) { 3297 /* 3298 * XXX - remove this hack! 3299 * remote has no valid address, we need to get one assigned. 3300 */ 3301 sp->ipcp.flags |= IPCP_HISADDR_DYN; 3302 } 3303 sppp_open_event(sp, xcp); 3304 } 3305 3306 static void 3307 sppp_ipcp_close(struct sppp *sp, void *xcp) 3308 { 3309 3310 KASSERT(SPPP_WLOCKED(sp)); 3311 3312 sppp_close_event(sp, xcp); 3313 3314 #ifdef INET 3315 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 3316 /* 3317 * Some address was dynamic, clear it again. 3318 */ 3319 sppp_clear_ip_addrs(sp); 3320 #endif 3321 } 3322 3323 /* 3324 * Analyze a configure request. Return true if it was agreeable, and 3325 * caused action sca, false if it has been rejected or nak'ed, and 3326 * caused action scn. (The return value is used to make the state 3327 * transition decision in the state automaton.) 3328 */ 3329 static int 3330 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int origlen) 3331 { 3332 u_char *buf, *r, *p, l, blen, type; 3333 struct ifnet *ifp = &sp->pp_if; 3334 int rlen, len, debug = ifp->if_flags & IFF_DEBUG; 3335 uint32_t hisaddr, desiredaddr; 3336 3337 KASSERT(SPPP_WLOCKED(sp)); 3338 3339 if (origlen < sizeof(*h)) 3340 return 0; 3341 3342 origlen -= sizeof(*h); 3343 type = 0; 3344 3345 /* 3346 * Make sure to allocate a buf that can at least hold a 3347 * conf-nak with an `address' option. We might need it below. 3348 */ 3349 blen = MAX(6, origlen); 3350 3351 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 3352 if (buf == NULL) 3353 return 0; 3354 3355 /* pass 1: see if we can recognize them */ 3356 if (debug) 3357 log(LOG_DEBUG, "%s: ipcp parse opts:", 3358 ifp->if_xname); 3359 p = (void *)(h + 1); 3360 r = buf; 3361 rlen = 0; 3362 for (len = origlen; len > 1; len -= l, p += l) { 3363 l = p[1]; 3364 if (l == 0) 3365 break; 3366 3367 /* Sanity check option length */ 3368 if (l > len) { 3369 /* XXX should we just RXJ? */ 3370 addlog("%s: malicious IPCP option received, dropping\n", 3371 ifp->if_xname); 3372 rlen = -1; 3373 goto end; 3374 } 3375 if (debug) 3376 addlog(" %s", sppp_ipcp_opt_name(*p)); 3377 switch (p[0]) { 3378 #ifdef notyet 3379 case IPCP_OPT_COMPRESSION: 3380 if (len >= 6 && l >= 6) { 3381 /* correctly formed compress option */ 3382 continue; 3383 } 3384 if (debug) 3385 addlog(" [invalid]"); 3386 break; 3387 #endif 3388 case IPCP_OPT_ADDRESS: 3389 if (len >= 6 && l == 6) { 3390 /* correctly formed address option */ 3391 continue; 3392 } 3393 if (debug) 3394 addlog(" [invalid]"); 3395 break; 3396 default: 3397 /* Others not supported. */ 3398 if (debug) 3399 addlog(" [rej]"); 3400 break; 3401 } 3402 /* Add the option to rejected list. */ 3403 if (rlen + l > blen) { 3404 if (debug) 3405 addlog(" [overflow]"); 3406 continue; 3407 } 3408 memcpy(r, p, l); 3409 r += l; 3410 rlen += l; 3411 } 3412 3413 if (rlen > 0) { 3414 type = CONF_REJ; 3415 goto end; 3416 } 3417 3418 if (debug) 3419 addlog("\n"); 3420 3421 /* pass 2: parse option values */ 3422 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 3423 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 3424 else 3425 #ifdef INET 3426 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 3427 #else 3428 hisaddr = 0; 3429 #endif 3430 if (debug) 3431 log(LOG_DEBUG, "%s: ipcp parse opt values: ", 3432 ifp->if_xname); 3433 p = (void *)(h + 1); 3434 r = buf; 3435 rlen = 0; 3436 for (len = origlen; len > 1; len -= l, p += l) { 3437 l = p[1]; 3438 if (l == 0) 3439 break; 3440 3441 if (debug) 3442 addlog(" %s", sppp_ipcp_opt_name(*p)); 3443 switch (p[0]) { 3444 #ifdef notyet 3445 case IPCP_OPT_COMPRESSION: 3446 continue; 3447 #endif 3448 case IPCP_OPT_ADDRESS: 3449 desiredaddr = p[2] << 24 | p[3] << 16 | 3450 p[4] << 8 | p[5]; 3451 if (desiredaddr == hisaddr || 3452 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 3453 /* 3454 * Peer's address is same as our value, 3455 * this is agreeable. Gonna conf-ack 3456 * it. 3457 */ 3458 if (debug) 3459 addlog(" %s [ack]", 3460 sppp_dotted_quad(hisaddr)); 3461 /* record that we've seen it already */ 3462 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 3463 sp->ipcp.req_hisaddr = desiredaddr; 3464 hisaddr = desiredaddr; 3465 continue; 3466 } 3467 /* 3468 * The address wasn't agreeable. This is either 3469 * he sent us 0.0.0.0, asking to assign him an 3470 * address, or he send us another address not 3471 * matching our value. Either case, we gonna 3472 * conf-nak it with our value. 3473 */ 3474 if (debug) { 3475 if (desiredaddr == 0) 3476 addlog(" [addr requested]"); 3477 else 3478 addlog(" %s [not agreed]", 3479 sppp_dotted_quad(desiredaddr)); 3480 } 3481 3482 p[2] = hisaddr >> 24; 3483 p[3] = hisaddr >> 16; 3484 p[4] = hisaddr >> 8; 3485 p[5] = hisaddr; 3486 break; 3487 } 3488 if (rlen + l > blen) { 3489 if (debug) 3490 addlog(" [overflow]"); 3491 continue; 3492 } 3493 /* Add the option to nak'ed list. */ 3494 memcpy(r, p, l); 3495 r += l; 3496 rlen += l; 3497 } 3498 3499 if (rlen > 0) { 3500 type = CONF_NAK; 3501 } else { 3502 if ((sp->ipcp.flags & IPCP_HISADDR_SEEN) == 0) { 3503 /* 3504 * If we are about to conf-ack the request, but haven't seen 3505 * his address so far, gonna conf-nak it instead, with the 3506 * `address' option present and our idea of his address being 3507 * filled in there, to request negotiation of both addresses. 3508 * 3509 * XXX This can result in an endless req - nak loop if peer 3510 * doesn't want to send us his address. Q: What should we do 3511 * about it? XXX A: implement the max-failure counter. 3512 */ 3513 buf[0] = IPCP_OPT_ADDRESS; 3514 buf[1] = 6; 3515 buf[2] = hisaddr >> 24; 3516 buf[3] = hisaddr >> 16; 3517 buf[4] = hisaddr >> 8; 3518 buf[5] = hisaddr; 3519 rlen = 6; 3520 if (debug) 3521 addlog(" still need hisaddr"); 3522 type = CONF_NAK; 3523 } else { 3524 type = CONF_ACK; 3525 rlen = origlen; 3526 memcpy(r, h + 1, rlen); 3527 } 3528 } 3529 3530 end: 3531 if (debug) 3532 addlog("\n"); 3533 3534 if (rlen < 0) { 3535 kmem_intr_free(buf, blen); 3536 return -1; 3537 } 3538 3539 if (sp->scp[IDX_IPCP].rcr_buf != NULL) { 3540 kmem_intr_free(sp->scp[IDX_IPCP].rcr_buf, 3541 sp->scp[IDX_IPCP].rcr_blen); 3542 } 3543 3544 sp->scp[IDX_IPCP].rcr_type = type; 3545 sp->scp[IDX_IPCP].rcr_buf = buf; 3546 sp->scp[IDX_IPCP].rcr_blen = blen; 3547 sp->scp[IDX_IPCP].rcr_rlen = rlen; 3548 3549 if (type != CONF_ACK) 3550 return 0; 3551 return 1; 3552 } 3553 3554 /* 3555 * Analyze the IPCP Configure-Reject option list, and adjust our 3556 * negotiation. 3557 */ 3558 static void 3559 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3560 { 3561 u_char *p, l; 3562 struct ifnet *ifp = &sp->pp_if; 3563 int debug = ifp->if_flags & IFF_DEBUG; 3564 3565 KASSERT(SPPP_WLOCKED(sp)); 3566 3567 if (len <= sizeof(*h)) 3568 return; 3569 3570 len -= sizeof(*h); 3571 3572 if (debug) 3573 log(LOG_DEBUG, "%s: ipcp rej opts:", 3574 ifp->if_xname); 3575 3576 p = (void *)(h + 1); 3577 for (; len > 1; len -= l, p += l) { 3578 l = p[1]; 3579 if (l == 0) 3580 break; 3581 3582 /* Sanity check option length */ 3583 if (l > len) { 3584 /* XXX should we just RXJ? */ 3585 addlog("%s: malicious IPCP option received, dropping\n", 3586 ifp->if_xname); 3587 goto end; 3588 } 3589 if (debug) 3590 addlog(" %s", sppp_ipcp_opt_name(*p)); 3591 switch (p[0]) { 3592 case IPCP_OPT_ADDRESS: 3593 /* 3594 * Peer doesn't grok address option. This is 3595 * bad. XXX Should we better give up here? 3596 */ 3597 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 3598 break; 3599 #ifdef notyet 3600 case IPCP_OPT_COMPRESS: 3601 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 3602 break; 3603 #endif 3604 } 3605 } 3606 if (debug) 3607 addlog("\n"); 3608 end: 3609 return; 3610 } 3611 3612 /* 3613 * Analyze the IPCP Configure-NAK option list, and adjust our 3614 * negotiation. 3615 */ 3616 static void 3617 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3618 { 3619 u_char *p, l; 3620 struct ifnet *ifp = &sp->pp_if; 3621 int debug = ifp->if_flags & IFF_DEBUG; 3622 uint32_t wantaddr; 3623 3624 KASSERT(SPPP_WLOCKED(sp)); 3625 3626 len -= sizeof(*h); 3627 3628 if (debug) 3629 log(LOG_DEBUG, "%s: ipcp nak opts:", 3630 ifp->if_xname); 3631 3632 p = (void *)(h + 1); 3633 for (; len > 1; len -= l, p += l) { 3634 l = p[1]; 3635 if (l == 0) 3636 break; 3637 3638 /* Sanity check option length */ 3639 if (l > len) { 3640 /* XXX should we just RXJ? */ 3641 addlog("%s: malicious IPCP option received, dropping\n", 3642 ifp->if_xname); 3643 return; 3644 } 3645 if (debug) 3646 addlog(" %s", sppp_ipcp_opt_name(*p)); 3647 switch (*p) { 3648 case IPCP_OPT_ADDRESS: 3649 /* 3650 * Peer doesn't like our local IP address. See 3651 * if we can do something for him. We'll drop 3652 * him our address then. 3653 */ 3654 if (len >= 6 && l == 6) { 3655 wantaddr = p[2] << 24 | p[3] << 16 | 3656 p[4] << 8 | p[5]; 3657 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3658 if (debug) 3659 addlog(" [wantaddr %s]", 3660 sppp_dotted_quad(wantaddr)); 3661 /* 3662 * When doing dynamic address assignment, 3663 * we accept his offer. Otherwise, we 3664 * ignore it and thus continue to negotiate 3665 * our already existing value. 3666 */ 3667 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3668 if (debug) 3669 addlog(" [agree]"); 3670 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3671 sp->ipcp.req_myaddr = wantaddr; 3672 } 3673 } 3674 break; 3675 3676 case IPCP_OPT_PRIMDNS: 3677 if (len >= 6 && l == 6) { 3678 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3679 p[4] << 8 | p[5]; 3680 } 3681 break; 3682 3683 case IPCP_OPT_SECDNS: 3684 if (len >= 6 && l == 6) { 3685 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3686 p[4] << 8 | p[5]; 3687 } 3688 break; 3689 #ifdef notyet 3690 case IPCP_OPT_COMPRESS: 3691 /* 3692 * Peer wants different compression parameters. 3693 */ 3694 break; 3695 #endif 3696 } 3697 } 3698 if (debug) 3699 addlog("\n"); 3700 } 3701 3702 static void 3703 sppp_ipcp_tlu(struct sppp *sp) 3704 { 3705 #ifdef INET 3706 KASSERT(SPPP_WLOCKED(sp)); 3707 /* we are up. Set addresses and notify anyone interested */ 3708 sppp_set_ip_addrs(sp); 3709 #endif 3710 } 3711 3712 static void 3713 sppp_ipcp_scr(struct sppp *sp) 3714 { 3715 uint8_t opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3716 #ifdef INET 3717 uint32_t ouraddr; 3718 #endif 3719 int i = 0; 3720 3721 KASSERT(SPPP_WLOCKED(sp)); 3722 3723 #ifdef notyet 3724 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3725 opt[i++] = IPCP_OPT_COMPRESSION; 3726 opt[i++] = 6; 3727 opt[i++] = 0; /* VJ header compression */ 3728 opt[i++] = 0x2d; /* VJ header compression */ 3729 opt[i++] = max_slot_id; 3730 opt[i++] = comp_slot_id; 3731 } 3732 #endif 3733 3734 #ifdef INET 3735 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3736 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3737 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3738 else 3739 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3740 opt[i++] = IPCP_OPT_ADDRESS; 3741 opt[i++] = 6; 3742 opt[i++] = ouraddr >> 24; 3743 opt[i++] = ouraddr >> 16; 3744 opt[i++] = ouraddr >> 8; 3745 opt[i++] = ouraddr; 3746 } 3747 #endif 3748 3749 if (sp->query_dns & 1) { 3750 opt[i++] = IPCP_OPT_PRIMDNS; 3751 opt[i++] = 6; 3752 opt[i++] = sp->dns_addrs[0] >> 24; 3753 opt[i++] = sp->dns_addrs[0] >> 16; 3754 opt[i++] = sp->dns_addrs[0] >> 8; 3755 opt[i++] = sp->dns_addrs[0]; 3756 } 3757 if (sp->query_dns & 2) { 3758 opt[i++] = IPCP_OPT_SECDNS; 3759 opt[i++] = 6; 3760 opt[i++] = sp->dns_addrs[1] >> 24; 3761 opt[i++] = sp->dns_addrs[1] >> 16; 3762 opt[i++] = sp->dns_addrs[1] >> 8; 3763 opt[i++] = sp->dns_addrs[1]; 3764 } 3765 3766 sp->scp[IDX_IPCP].confid = ++sp->scp[IDX_IPCP].seq; 3767 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->scp[IDX_IPCP].confid, i, &opt); 3768 } 3769 3770 3771 /* 3772 *--------------------------------------------------------------------------* 3773 * * 3774 * The IPv6CP implementation. * 3775 * * 3776 *--------------------------------------------------------------------------* 3777 */ 3778 3779 #ifdef INET6 3780 static void 3781 sppp_ipv6cp_init(struct sppp *sp) 3782 { 3783 3784 KASSERT(SPPP_WLOCKED(sp)); 3785 3786 sp->ipv6cp.opts = 0; 3787 sp->ipv6cp.flags = 0; 3788 sp->scp[IDX_IPV6CP].state = STATE_INITIAL; 3789 sp->scp[IDX_IPV6CP].fail_counter = 0; 3790 sp->scp[IDX_IPV6CP].seq = 0; 3791 sp->scp[IDX_IPV6CP].rseq = 0; 3792 sppp_cp_init(&ipv6cp, sp); 3793 } 3794 3795 static void 3796 sppp_ipv6cp_open(struct sppp *sp, void *xcp) 3797 { 3798 STDDCL; 3799 struct in6_addr myaddr, hisaddr; 3800 3801 KASSERT(SPPP_WLOCKED(sp)); 3802 3803 #ifdef IPV6CP_MYIFID_DYN 3804 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3805 #else 3806 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3807 #endif 3808 3809 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3810 /* 3811 * If we don't have our address, this probably means our 3812 * interface doesn't want to talk IPv6 at all. (This could 3813 * be the case if somebody wants to speak only IPX, for 3814 * example.) Don't open IPv6CP in this case. 3815 */ 3816 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3817 /* XXX this message should go away */ 3818 if (debug) 3819 log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n", 3820 ifp->if_xname); 3821 return; 3822 } 3823 3824 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3825 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3826 sppp_open_event(sp, xcp); 3827 } 3828 3829 /* 3830 * Analyze a configure request. Return true if it was agreeable, and 3831 * caused action sca, false if it has been rejected or nak'ed, and 3832 * caused action scn. (The return value is used to make the state 3833 * transition decision in the state automaton.) 3834 */ 3835 static int 3836 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int origlen) 3837 { 3838 u_char *buf, *r, *p, l, blen; 3839 struct ifnet *ifp = &sp->pp_if; 3840 int rlen, len, debug = ifp->if_flags & IFF_DEBUG; 3841 struct in6_addr myaddr, desiredaddr, suggestaddr; 3842 int ifidcount; 3843 int type; 3844 int collision, nohisaddr; 3845 char ip6buf[INET6_ADDRSTRLEN]; 3846 3847 KASSERT(SPPP_WLOCKED(sp)); 3848 3849 if (origlen < sizeof(*h)) 3850 return 0; 3851 3852 origlen -= sizeof(*h); 3853 type = 0; 3854 3855 /* 3856 * Make sure to allocate a buf that can at least hold a 3857 * conf-nak with an `address' option. We might need it below. 3858 */ 3859 blen = MAX(6, origlen); 3860 3861 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 3862 if (buf == NULL) 3863 return 0; 3864 3865 /* pass 1: see if we can recognize them */ 3866 if (debug) 3867 log(LOG_DEBUG, "%s: ipv6cp parse opts:", 3868 ifp->if_xname); 3869 p = (void *)(h + 1); 3870 r = buf; 3871 rlen = 0; 3872 ifidcount = 0; 3873 for (len = origlen; len > 1; len -= l, p += l) { 3874 l = p[1]; 3875 if (l == 0) 3876 break; 3877 3878 /* Sanity check option length */ 3879 if (l > len) { 3880 /* XXX just RXJ? */ 3881 addlog("%s: received malicious IPCPv6 option, " 3882 "dropping\n", ifp->if_xname); 3883 rlen = -1; 3884 goto end; 3885 } 3886 if (debug) 3887 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3888 switch (p[0]) { 3889 case IPV6CP_OPT_IFID: 3890 if (len >= 10 && l == 10 && ifidcount == 0) { 3891 /* correctly formed address option */ 3892 ifidcount++; 3893 continue; 3894 } 3895 if (debug) 3896 addlog(" [invalid]"); 3897 break; 3898 #ifdef notyet 3899 case IPV6CP_OPT_COMPRESSION: 3900 if (len >= 4 && l >= 4) { 3901 /* correctly formed compress option */ 3902 continue; 3903 } 3904 if (debug) 3905 addlog(" [invalid]"); 3906 break; 3907 #endif 3908 default: 3909 /* Others not supported. */ 3910 if (debug) 3911 addlog(" [rej]"); 3912 break; 3913 } 3914 if (rlen + l > blen) { 3915 if (debug) 3916 addlog(" [overflow]"); 3917 continue; 3918 } 3919 /* Add the option to rejected list. */ 3920 memcpy(r, p, l); 3921 r += l; 3922 rlen += l; 3923 } 3924 3925 if (rlen > 0) { 3926 type = CONF_REJ; 3927 goto end; 3928 } 3929 3930 if (debug) 3931 addlog("\n"); 3932 3933 /* pass 2: parse option values */ 3934 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3935 if (debug) 3936 log(LOG_DEBUG, "%s: ipv6cp parse opt values: ", 3937 ifp->if_xname); 3938 p = (void *)(h + 1); 3939 r = buf; 3940 rlen = 0; 3941 type = CONF_ACK; 3942 for (len = origlen; len > 1; len -= l, p += l) { 3943 l = p[1]; 3944 if (l == 0) 3945 break; 3946 3947 if (debug) 3948 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3949 switch (p[0]) { 3950 #ifdef notyet 3951 case IPV6CP_OPT_COMPRESSION: 3952 continue; 3953 #endif 3954 case IPV6CP_OPT_IFID: 3955 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3956 memcpy(&desiredaddr.s6_addr[8], &p[2], 8); 3957 collision = (memcmp(&desiredaddr.s6_addr[8], 3958 &myaddr.s6_addr[8], 8) == 0); 3959 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3960 3961 desiredaddr.s6_addr16[0] = htons(0xfe80); 3962 (void)in6_setscope(&desiredaddr, &sp->pp_if, NULL); 3963 3964 if (!collision && !nohisaddr) { 3965 /* no collision, hisaddr known - Conf-Ack */ 3966 type = CONF_ACK; 3967 3968 if (debug) { 3969 addlog(" %s [%s]", 3970 IN6_PRINT(ip6buf, &desiredaddr), 3971 sppp_cp_type_name(type)); 3972 } 3973 continue; 3974 } 3975 3976 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3977 if (collision && nohisaddr) { 3978 /* collision, hisaddr unknown - Conf-Rej */ 3979 type = CONF_REJ; 3980 memset(&p[2], 0, 8); 3981 } else { 3982 /* 3983 * - no collision, hisaddr unknown, or 3984 * - collision, hisaddr known 3985 * Conf-Nak, suggest hisaddr 3986 */ 3987 type = CONF_NAK; 3988 sppp_suggest_ip6_addr(sp, &suggestaddr); 3989 memcpy(&p[2], &suggestaddr.s6_addr[8], 8); 3990 } 3991 if (debug) 3992 addlog(" %s [%s]", IN6_PRINT(ip6buf, &desiredaddr), 3993 sppp_cp_type_name(type)); 3994 break; 3995 } 3996 if (rlen + l > blen) { 3997 if (debug) 3998 addlog(" [overflow]"); 3999 continue; 4000 } 4001 /* Add the option to nak'ed list. */ 4002 memcpy(r, p, l); 4003 r += l; 4004 rlen += l; 4005 } 4006 4007 if (rlen > 0) { 4008 if (type != CONF_ACK) { 4009 if (debug) { 4010 addlog(" send %s suggest %s\n", 4011 sppp_cp_type_name(type), 4012 IN6_PRINT(ip6buf, &suggestaddr)); 4013 } 4014 } 4015 #ifdef notdef 4016 if (type == CONF_ACK) 4017 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 4018 #endif 4019 } else { 4020 if (type == CONF_ACK) { 4021 rlen = origlen; 4022 memcpy(r, h + 1, rlen); 4023 } 4024 } 4025 end: 4026 if (debug) 4027 addlog("\n"); 4028 4029 if (rlen < 0) { 4030 kmem_intr_free(buf, blen); 4031 return -1; 4032 } 4033 4034 if (sp->scp[IDX_IPV6CP].rcr_buf != NULL) { 4035 kmem_intr_free(sp->scp[IDX_IPV6CP].rcr_buf, 4036 sp->scp[IDX_IPV6CP].rcr_blen); 4037 } 4038 4039 sp->scp[IDX_IPV6CP].rcr_type = type; 4040 sp->scp[IDX_IPV6CP].rcr_buf = buf; 4041 sp->scp[IDX_IPV6CP].rcr_blen = blen; 4042 sp->scp[IDX_IPV6CP].rcr_rlen = rlen; 4043 4044 if (type != CONF_ACK) 4045 return 0; 4046 return 0; 4047 } 4048 4049 /* 4050 * Analyze the IPv6CP Configure-Reject option list, and adjust our 4051 * negotiation. 4052 */ 4053 static void 4054 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 4055 { 4056 u_char *p, l; 4057 struct ifnet *ifp = &sp->pp_if; 4058 int debug = ifp->if_flags & IFF_DEBUG; 4059 4060 KASSERT(SPPP_WLOCKED(sp)); 4061 4062 if (len <= sizeof(*h)) 4063 return; 4064 4065 len -= sizeof(*h); 4066 4067 if (debug) 4068 log(LOG_DEBUG, "%s: ipv6cp rej opts:", 4069 ifp->if_xname); 4070 4071 p = (void *)(h + 1); 4072 for (; len > 1; len -= l, p += l) { 4073 l = p[1]; 4074 if (l == 0) 4075 break; 4076 4077 if (l > len) { 4078 /* XXX just RXJ? */ 4079 addlog("%s: received malicious IPCPv6 option, " 4080 "dropping\n", ifp->if_xname); 4081 goto end; 4082 } 4083 if (debug) 4084 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4085 switch (p[0]) { 4086 case IPV6CP_OPT_IFID: 4087 /* 4088 * Peer doesn't grok address option. This is 4089 * bad. XXX Should we better give up here? 4090 */ 4091 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 4092 break; 4093 #ifdef notyet 4094 case IPV6CP_OPT_COMPRESS: 4095 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 4096 break; 4097 #endif 4098 } 4099 } 4100 if (debug) 4101 addlog("\n"); 4102 end: 4103 return; 4104 } 4105 4106 /* 4107 * Analyze the IPv6CP Configure-NAK option list, and adjust our 4108 * negotiation. 4109 */ 4110 static void 4111 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 4112 { 4113 u_char *p, l; 4114 struct ifnet *ifp = &sp->pp_if; 4115 int debug = ifp->if_flags & IFF_DEBUG; 4116 struct in6_addr suggestaddr; 4117 char ip6buf[INET6_ADDRSTRLEN]; 4118 4119 KASSERT(SPPP_WLOCKED(sp)); 4120 4121 if (len <= sizeof(*h)) 4122 return; 4123 4124 len -= sizeof(*h); 4125 4126 if (debug) 4127 log(LOG_DEBUG, "%s: ipv6cp nak opts:", 4128 ifp->if_xname); 4129 4130 p = (void *)(h + 1); 4131 for (; len > 1; len -= l, p += l) { 4132 l = p[1]; 4133 if (l == 0) 4134 break; 4135 4136 if (l > len) { 4137 /* XXX just RXJ? */ 4138 addlog("%s: received malicious IPCPv6 option, " 4139 "dropping\n", ifp->if_xname); 4140 goto end; 4141 } 4142 if (debug) 4143 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4144 switch (p[0]) { 4145 case IPV6CP_OPT_IFID: 4146 /* 4147 * Peer doesn't like our local ifid. See 4148 * if we can do something for him. We'll drop 4149 * him our address then. 4150 */ 4151 if (len < 10 || l != 10) 4152 break; 4153 memset(&suggestaddr, 0, sizeof(suggestaddr)); 4154 suggestaddr.s6_addr16[0] = htons(0xfe80); 4155 (void)in6_setscope(&suggestaddr, &sp->pp_if, NULL); 4156 memcpy(&suggestaddr.s6_addr[8], &p[2], 8); 4157 4158 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 4159 if (debug) 4160 addlog(" [suggestaddr %s]", 4161 IN6_PRINT(ip6buf, &suggestaddr)); 4162 #ifdef IPV6CP_MYIFID_DYN 4163 /* 4164 * When doing dynamic address assignment, 4165 * we accept his offer. 4166 */ 4167 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 4168 struct in6_addr lastsuggest; 4169 /* 4170 * If <suggested myaddr from peer> equals to 4171 * <hisaddr we have suggested last time>, 4172 * we have a collision. generate new random 4173 * ifid. 4174 */ 4175 sppp_suggest_ip6_addr(&lastsuggest); 4176 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 4177 lastsuggest)) { 4178 if (debug) 4179 addlog(" [random]"); 4180 sppp_gen_ip6_addr(sp, &suggestaddr); 4181 } 4182 sppp_set_ip6_addr(sp, &suggestaddr, 0); 4183 if (debug) 4184 addlog(" [agree]"); 4185 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 4186 } 4187 #else 4188 /* 4189 * Since we do not do dynamic address assignment, 4190 * we ignore it and thus continue to negotiate 4191 * our already existing value. This can possibly 4192 * go into infinite request-reject loop. 4193 * 4194 * This is not likely because we normally use 4195 * ifid based on MAC-address. 4196 * If you have no ethernet card on the node, too bad. 4197 * XXX should we use fail_counter? 4198 */ 4199 #endif 4200 break; 4201 #ifdef notyet 4202 case IPV6CP_OPT_COMPRESS: 4203 /* 4204 * Peer wants different compression parameters. 4205 */ 4206 break; 4207 #endif 4208 } 4209 } 4210 if (debug) 4211 addlog("\n"); 4212 end: 4213 return; 4214 } 4215 4216 static void 4217 sppp_ipv6cp_tlu(struct sppp *sp) 4218 { 4219 4220 KASSERT(SPPP_WLOCKED(sp)); 4221 /* we are up - notify isdn daemon */ 4222 sppp_notify_con_wlocked(sp); 4223 } 4224 4225 static void 4226 sppp_ipv6cp_scr(struct sppp *sp) 4227 { 4228 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 4229 struct in6_addr ouraddr; 4230 int i = 0; 4231 4232 KASSERT(SPPP_WLOCKED(sp)); 4233 4234 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 4235 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 4236 opt[i++] = IPV6CP_OPT_IFID; 4237 opt[i++] = 10; 4238 memcpy(&opt[i], &ouraddr.s6_addr[8], 8); 4239 i += 8; 4240 } 4241 4242 #ifdef notyet 4243 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 4244 opt[i++] = IPV6CP_OPT_COMPRESSION; 4245 opt[i++] = 4; 4246 opt[i++] = 0; /* TBD */ 4247 opt[i++] = 0; /* TBD */ 4248 /* variable length data may follow */ 4249 } 4250 #endif 4251 4252 sp->scp[IDX_IPV6CP].confid = ++sp->scp[IDX_IPV6CP].seq; 4253 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->scp[IDX_IPV6CP].confid, i, &opt); 4254 } 4255 #else /*INET6*/ 4256 static void 4257 sppp_ipv6cp_init(struct sppp *sp) 4258 { 4259 4260 KASSERT(SPPP_WLOCKED(sp)); 4261 } 4262 4263 static void 4264 sppp_ipv6cp_open(struct sppp *sp, void *xcp) 4265 { 4266 4267 KASSERT(SPPP_WLOCKED(sp)); 4268 } 4269 4270 static int 4271 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, 4272 int len) 4273 { 4274 4275 KASSERT(SPPP_WLOCKED(sp)); 4276 return 0; 4277 } 4278 4279 static void 4280 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, 4281 int len) 4282 { 4283 4284 KASSERT(SPPP_WLOCKED(sp)); 4285 } 4286 4287 static void 4288 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, 4289 int len) 4290 { 4291 4292 KASSERT(SPPP_WLOCKED(sp)); 4293 } 4294 4295 static void 4296 sppp_ipv6cp_tlu(struct sppp *sp) 4297 { 4298 4299 KASSERT(SPPP_WLOCKED(sp)); 4300 } 4301 4302 static void 4303 sppp_ipv6cp_scr(struct sppp *sp) 4304 { 4305 4306 KASSERT(SPPP_WLOCKED(sp)); 4307 } 4308 #endif /*INET6*/ 4309 4310 4311 /* 4312 *--------------------------------------------------------------------------* 4313 * * 4314 * The CHAP implementation. * 4315 * * 4316 *--------------------------------------------------------------------------* 4317 */ 4318 /* 4319 * The authentication protocols is implemented on the state machine for 4320 * control protocols. And it uses following actions and events. 4321 * 4322 * Actions: 4323 * - scr: send CHAP_CHALLENGE and CHAP_RESPONSE 4324 * - sca: send CHAP_SUCCESS 4325 * - scn: send CHAP_FAILURE and shutdown lcp 4326 * Events: 4327 * - RCR+: receive CHAP_RESPONSE containing correct digest 4328 * - RCR-: receive CHAP_RESPONSE containing wrong digest 4329 * - RCA: receive CHAP_SUCCESS 4330 * - RCN: (this event is unused) 4331 * - TO+: re-send CHAP_CHALLENGE and CHAP_RESPONSE 4332 * - TO-: this layer finish 4333 */ 4334 4335 /* 4336 * Handle incoming CHAP packets. 4337 */ 4338 void 4339 sppp_chap_input(struct sppp *sp, struct mbuf *m) 4340 { 4341 STDDCL; 4342 struct lcp_header *h; 4343 int len, x; 4344 u_char *value, *name, digest[sizeof(sp->chap.challenge)]; 4345 int value_len, name_len; 4346 MD5_CTX ctx; 4347 4348 len = m->m_pkthdr.len; 4349 if (len < 4) { 4350 if (debug) 4351 log(LOG_DEBUG, 4352 "%s: chap invalid packet length: %d bytes\n", 4353 ifp->if_xname, len); 4354 return; 4355 } 4356 h = mtod(m, struct lcp_header *); 4357 if (len > ntohs(h->len)) 4358 len = ntohs(h->len); 4359 4360 SPPP_LOCK(sp, RW_WRITER); 4361 4362 switch (h->type) { 4363 /* challenge, failure and success are his authproto */ 4364 case CHAP_CHALLENGE: 4365 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4366 /* can't do anything useful */ 4367 sp->pp_auth_failures++; 4368 printf("%s: chap input without my name and my secret being set\n", 4369 ifp->if_xname); 4370 break; 4371 } 4372 value = 1 + (u_char *)(h + 1); 4373 value_len = value[-1]; 4374 name = value + value_len; 4375 name_len = len - value_len - 5; 4376 if (name_len < 0) { 4377 if (debug) { 4378 log(LOG_DEBUG, 4379 "%s: chap corrupted challenge " 4380 "<%s id=0x%x len=%d", 4381 ifp->if_xname, 4382 sppp_auth_type_name(PPP_CHAP, h->type), 4383 h->ident, ntohs(h->len)); 4384 if (len > 4) 4385 sppp_print_bytes((u_char *)(h + 1), 4386 len - 4); 4387 addlog(">\n"); 4388 } 4389 break; 4390 } 4391 4392 if (debug) { 4393 log(LOG_DEBUG, 4394 "%s: chap input <%s id=0x%x len=%d name=", 4395 ifp->if_xname, 4396 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 4397 ntohs(h->len)); 4398 sppp_print_string((char *) name, name_len); 4399 addlog(" value-size=%d value=", value_len); 4400 sppp_print_bytes(value, value_len); 4401 addlog(">\n"); 4402 } 4403 4404 /* Compute reply value. */ 4405 MD5Init(&ctx); 4406 MD5Update(&ctx, &h->ident, 1); 4407 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 4408 MD5Update(&ctx, value, value_len); 4409 MD5Final(sp->chap.digest, &ctx); 4410 sp->chap.digest_len = sizeof(sp->chap.digest); 4411 sp->scp[IDX_CHAP].rconfid = h->ident; 4412 4413 sppp_wq_add(sp->wq_cp, &sp->chap.work_challenge_rcvd); 4414 break; 4415 4416 case CHAP_SUCCESS: 4417 if (debug) { 4418 log(LOG_DEBUG, "%s: chap success", 4419 ifp->if_xname); 4420 if (len > 4) { 4421 addlog(": "); 4422 sppp_print_string((char *)(h + 1), len - 4); 4423 } 4424 addlog("\n"); 4425 } 4426 4427 if (h->ident != sp->scp[IDX_CHAP].rconfid) { 4428 if (debug) { 4429 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4430 ifp->if_xname, chap.name, 4431 h->ident, sp->scp[IDX_CHAP].rconfid); 4432 } 4433 if_statinc(ifp, if_ierrors); 4434 break; 4435 } 4436 4437 if (sp->chap.digest_len == 0) { 4438 if (debug) { 4439 log(LOG_DEBUG, 4440 "%s: receive CHAP success without challenge\n", 4441 ifp->if_xname); 4442 } 4443 if_statinc(ifp, if_ierrors); 4444 break; 4445 } 4446 4447 x = splnet(); 4448 sp->pp_auth_failures = 0; 4449 sp->pp_flags &= ~PP_NEEDAUTH; 4450 splx(x); 4451 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4452 sp->chap.digest_len = 0; 4453 4454 if (!ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_SERV)) { 4455 /* 4456 * we are not authenticator for CHAP, 4457 * generate a dummy RCR+ event without CHAP_RESPONSE 4458 */ 4459 sp->scp[IDX_CHAP].rcr_type = CONF_ACK; 4460 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4461 } 4462 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rca); 4463 break; 4464 4465 case CHAP_FAILURE: 4466 if (h->ident != sp->scp[IDX_CHAP].rconfid) { 4467 if (debug) { 4468 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4469 ifp->if_xname, chap.name, 4470 h->ident, sp->scp[IDX_CHAP].rconfid); 4471 } 4472 if_statinc(ifp, if_ierrors); 4473 break; 4474 } 4475 4476 if (sp->chap.digest_len == 0) { 4477 if (debug) { 4478 log(LOG_DEBUG, 4479 "%s: receive CHAP failure without challenge\n", 4480 ifp->if_xname); 4481 } 4482 if_statinc(ifp, if_ierrors); 4483 break; 4484 } 4485 4486 x = splnet(); 4487 sp->pp_auth_failures++; 4488 splx(x); 4489 if (debug) { 4490 log(LOG_INFO, "%s: chap failure", 4491 ifp->if_xname); 4492 if (len > 4) { 4493 addlog(": "); 4494 sppp_print_string((char *)(h + 1), len - 4); 4495 } 4496 addlog("\n"); 4497 } else 4498 log(LOG_INFO, "%s: chap failure\n", 4499 ifp->if_xname); 4500 4501 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4502 sp->chap.digest_len = 0; 4503 /* 4504 * await LCP shutdown by authenticator, 4505 * so we don't have to enqueue sc->scp[IDX_CHAP].work_rcn 4506 */ 4507 break; 4508 4509 /* response is my authproto */ 4510 case CHAP_RESPONSE: 4511 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4512 /* can't do anything useful */ 4513 printf("%s: chap response" 4514 " without his name and his secret being set\n", 4515 ifp->if_xname); 4516 break; 4517 } 4518 value = 1 + (u_char *)(h + 1); 4519 value_len = value[-1]; 4520 name = value + value_len; 4521 name_len = len - value_len - 5; 4522 if (name_len < 0) { 4523 if (debug) { 4524 log(LOG_DEBUG, 4525 "%s: chap corrupted response " 4526 "<%s id=0x%x len=%d", 4527 ifp->if_xname, 4528 sppp_auth_type_name(PPP_CHAP, h->type), 4529 h->ident, ntohs(h->len)); 4530 if (len > 4) 4531 sppp_print_bytes((u_char *)(h + 1), 4532 len - 4); 4533 addlog(">\n"); 4534 } 4535 break; 4536 } 4537 if (h->ident != sp->scp[IDX_CHAP].confid) { 4538 if (debug) 4539 log(LOG_DEBUG, 4540 "%s: chap dropping response for old ID " 4541 "(got %d, expected %d)\n", 4542 ifp->if_xname, 4543 h->ident, sp->scp[IDX_CHAP].confid); 4544 break; 4545 } else { 4546 sp->scp[IDX_CHAP].rconfid = h->ident; 4547 } 4548 4549 if (sp->hisauth.name != NULL && 4550 (name_len != sp->hisauth.name_len 4551 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 4552 log(LOG_INFO, "%s: chap response, his name ", 4553 ifp->if_xname); 4554 sppp_print_string(name, name_len); 4555 addlog(" != expected "); 4556 sppp_print_string(sp->hisauth.name, 4557 sp->hisauth.name_len); 4558 addlog("\n"); 4559 4560 /* generate RCR- event */ 4561 sp->scp[IDX_CHAP].rcr_type = CONF_NAK; 4562 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4563 break; 4564 } 4565 4566 if (debug) { 4567 log(LOG_DEBUG, "%s: chap input(%s) " 4568 "<%s id=0x%x len=%d name=", 4569 ifp->if_xname, 4570 sppp_state_name(sp->scp[IDX_CHAP].state), 4571 sppp_auth_type_name(PPP_CHAP, h->type), 4572 h->ident, ntohs(h->len)); 4573 sppp_print_string((char *)name, name_len); 4574 addlog(" value-size=%d value=", value_len); 4575 sppp_print_bytes(value, value_len); 4576 addlog(">\n"); 4577 } 4578 4579 if (value_len == sizeof(sp->chap.challenge) && 4580 value_len == sizeof(sp->chap.digest)) { 4581 MD5Init(&ctx); 4582 MD5Update(&ctx, &h->ident, 1); 4583 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 4584 MD5Update(&ctx, sp->chap.challenge, sizeof(sp->chap.challenge)); 4585 MD5Final(digest, &ctx); 4586 4587 if (memcmp(digest, value, value_len) == 0) { 4588 sp->scp[IDX_CHAP].rcr_type = CONF_ACK; 4589 if (!ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_PEER) || 4590 sp->chap.rechallenging) { 4591 /* generate a dummy RCA event*/ 4592 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rca); 4593 } 4594 } else { 4595 sp->scp[IDX_CHAP].rcr_type = CONF_NAK; 4596 } 4597 } else { 4598 if (debug) 4599 log(LOG_DEBUG, 4600 "%s: chap bad hash value length: " 4601 "%d bytes, should be %zu\n", 4602 ifp->if_xname, value_len, 4603 sizeof(sp->chap.challenge)); 4604 4605 sp->scp[IDX_CHAP].rcr_type = CONF_NAK; 4606 } 4607 4608 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4609 break; 4610 4611 default: 4612 /* Unknown CHAP packet type -- ignore. */ 4613 if (debug) { 4614 log(LOG_DEBUG, "%s: chap unknown input(%s) " 4615 "<0x%x id=0x%xh len=%d", 4616 ifp->if_xname, 4617 sppp_state_name(sp->scp[IDX_CHAP].state), 4618 h->type, h->ident, ntohs(h->len)); 4619 if (len > 4) 4620 sppp_print_bytes((u_char *)(h + 1), len - 4); 4621 addlog(">\n"); 4622 } 4623 break; 4624 4625 } 4626 4627 SPPP_UNLOCK(sp); 4628 } 4629 4630 static void 4631 sppp_chap_init(struct sppp *sp) 4632 { 4633 4634 KASSERT(SPPP_WLOCKED(sp)); 4635 4636 sp->scp[IDX_CHAP].state = STATE_INITIAL; 4637 sp->scp[IDX_CHAP].fail_counter = 0; 4638 sp->scp[IDX_CHAP].seq = 0; 4639 sp->scp[IDX_CHAP].rseq = 0; 4640 SPPP_WQ_SET(&sp->chap.work_challenge_rcvd, 4641 sppp_chap_rcv_challenge_event, &chap); 4642 sppp_cp_init(&chap, sp); 4643 } 4644 4645 static void 4646 sppp_chap_open(struct sppp *sp, void *xcp) 4647 { 4648 4649 KASSERT(SPPP_WLOCKED(sp)); 4650 4651 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4652 sp->chap.digest_len = 0; 4653 sp->chap.rechallenging = false; 4654 sp->chap.response_rcvd = false; 4655 sppp_open_event(sp, xcp); 4656 } 4657 4658 static void 4659 sppp_chap_tlu(struct sppp *sp) 4660 { 4661 STDDCL; 4662 int i, x; 4663 4664 KASSERT(SPPP_WLOCKED(sp)); 4665 4666 i = 0; 4667 sp->scp[IDX_CHAP].rst_counter = sp->lcp.max_configure; 4668 x = splnet(); 4669 sp->pp_auth_failures = 0; 4670 splx(x); 4671 4672 log(LOG_DEBUG, "%s: chap %s", ifp->if_xname, 4673 sp->pp_phase == SPPP_PHASE_NETWORK ? "reconfirmed" : "tlu"); 4674 4675 /* 4676 * Some broken CHAP implementations (Conware CoNet, firmware 4677 * 4.0.?) don't want to re-authenticate their CHAP once the 4678 * initial challenge-response exchange has taken place. 4679 * Provide for an option to avoid rechallenges. 4680 */ 4681 if (ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_SERV) && 4682 (sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4683 /* 4684 * Compute the re-challenge timeout. This will yield 4685 * a number between 300 and 810 seconds. 4686 */ 4687 i = 300 + ((unsigned)(cprng_fast32() & 0xff00) >> 7); 4688 callout_schedule(&sp->scp[IDX_CHAP].ch, i * hz); 4689 4690 if (debug) { 4691 addlog(", next rechallenge in %d seconds", i); 4692 } 4693 } 4694 4695 addlog("\n"); 4696 4697 /* 4698 * If we are already in phase network, we are done here. This 4699 * is the case if this is a dummy tlu event after a re-challenge. 4700 */ 4701 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4702 sppp_phase_network(sp); 4703 } 4704 4705 static void 4706 sppp_chap_scr(struct sppp *sp) 4707 { 4708 uint32_t *ch; 4709 u_char clen, dsize; 4710 int role; 4711 4712 KASSERT(SPPP_WLOCKED(sp)); 4713 4714 role = sppp_auth_role(&chap, sp); 4715 4716 if (ISSET(role, SPPP_AUTH_SERV) && 4717 !sp->chap.response_rcvd) { 4718 /* we are authenticator for CHAP, send challenge */ 4719 ch = (uint32_t *)sp->chap.challenge; 4720 clen = sizeof(sp->chap.challenge); 4721 /* Compute random challenge. */ 4722 cprng_strong(kern_cprng, ch, clen, 0); 4723 4724 sp->scp[IDX_CHAP].confid = ++sp->scp[IDX_CHAP].seq; 4725 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->scp[IDX_CHAP].confid, 4726 sizeof(clen), (const char *)&clen, 4727 sizeof(sp->chap.challenge), sp->chap.challenge, 4728 0); 4729 } 4730 4731 if (ISSET(role, SPPP_AUTH_PEER) && 4732 sp->chap.digest_len > 0) { 4733 /* we are peer for CHAP, send response */ 4734 dsize = sp->chap.digest_len; 4735 4736 sppp_auth_send(&chap, sp, CHAP_RESPONSE, sp->scp[IDX_CHAP].rconfid, 4737 sizeof(dsize), (const char *)&dsize, 4738 sp->chap.digest_len, sp->chap.digest, 4739 sp->myauth.name_len, sp->myauth.name, 0); 4740 } 4741 } 4742 4743 static void 4744 sppp_chap_rcv_challenge_event(struct sppp *sp, void *xcp) 4745 { 4746 const struct cp *cp = xcp; 4747 4748 sp->chap.rechallenging = false; 4749 4750 switch (sp->scp[IDX_CHAP].state) { 4751 case STATE_REQ_SENT: 4752 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 4753 cp->scr(sp); 4754 break; 4755 case STATE_OPENED: 4756 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 4757 cp->scr(sp); 4758 break; 4759 } 4760 } 4761 4762 /* 4763 *--------------------------------------------------------------------------* 4764 * * 4765 * The PAP implementation. * 4766 * * 4767 *--------------------------------------------------------------------------* 4768 */ 4769 /* 4770 * PAP uses following actions and events. 4771 * Actions: 4772 * - scr: send PAP_REQ 4773 * - sca: send PAP_ACK 4774 * - scn: send PAP_NAK 4775 * Events: 4776 * - RCR+: receive PAP_REQ containing correct username and password 4777 * - RCR-: receive PAP_REQ containing wrong username and password 4778 * - RCA: receive PAP_ACK 4779 * - RCN: (this event is unused) 4780 * - TO+: re-send PAP_REQ 4781 * - TO-: this layer finish 4782 */ 4783 4784 /* 4785 * Handle incoming PAP packets. */ 4786 static void 4787 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4788 { 4789 STDDCL; 4790 struct lcp_header *h; 4791 int len, x; 4792 char *name, *secret; 4793 int name_len, secret_len; 4794 4795 /* 4796 * Malicious input might leave this uninitialized, so 4797 * init to an impossible value. 4798 */ 4799 secret_len = -1; 4800 4801 len = m->m_pkthdr.len; 4802 if (len < 5) { 4803 if (debug) 4804 log(LOG_DEBUG, 4805 "%s: pap invalid packet length: %d bytes\n", 4806 ifp->if_xname, len); 4807 return; 4808 } 4809 h = mtod(m, struct lcp_header *); 4810 if (len > ntohs(h->len)) 4811 len = ntohs(h->len); 4812 4813 SPPP_LOCK(sp, RW_WRITER); 4814 4815 switch (h->type) { 4816 /* PAP request is my authproto */ 4817 case PAP_REQ: 4818 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4819 /* can't do anything useful */ 4820 printf("%s: pap request" 4821 " without his name and his secret being set\n", 4822 ifp->if_xname); 4823 break; 4824 } 4825 name = 1 + (u_char *)(h + 1); 4826 name_len = name[-1]; 4827 secret = name + name_len + 1; 4828 if (name_len > len - 6 || 4829 (secret_len = secret[-1]) > len - 6 - name_len) { 4830 if (debug) { 4831 log(LOG_DEBUG, "%s: pap corrupted input " 4832 "<%s id=0x%x len=%d", 4833 ifp->if_xname, 4834 sppp_auth_type_name(PPP_PAP, h->type), 4835 h->ident, ntohs(h->len)); 4836 if (len > 4) 4837 sppp_print_bytes((u_char *)(h + 1), 4838 len - 4); 4839 addlog(">\n"); 4840 } 4841 break; 4842 } 4843 if (debug) { 4844 log(LOG_DEBUG, "%s: pap input(%s) " 4845 "<%s id=0x%x len=%d name=", 4846 ifp->if_xname, 4847 sppp_state_name(sp->scp[IDX_PAP].state), 4848 sppp_auth_type_name(PPP_PAP, h->type), 4849 h->ident, ntohs(h->len)); 4850 sppp_print_string((char *)name, name_len); 4851 addlog(" secret="); 4852 sppp_print_string((char *)secret, secret_len); 4853 addlog(">\n"); 4854 } 4855 4856 sp->scp[IDX_PAP].rconfid = h->ident; 4857 4858 if (name_len == sp->hisauth.name_len && 4859 memcmp(name, sp->hisauth.name, name_len) == 0 && 4860 secret_len == sp->hisauth.secret_len && 4861 memcmp(secret, sp->hisauth.secret, secret_len) == 0) { 4862 sp->scp[IDX_PAP].rcr_type = CONF_ACK; 4863 if (!ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_PEER)) { 4864 /* generate a dummy RCA event*/ 4865 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rca); 4866 } 4867 } else { 4868 sp->scp[IDX_PAP].rcr_type = CONF_NAK; 4869 } 4870 4871 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rcr); 4872 break; 4873 4874 /* ack and nak are his authproto */ 4875 case PAP_ACK: 4876 if (debug) { 4877 log(LOG_DEBUG, "%s: pap success", 4878 ifp->if_xname); 4879 name = 1 + (u_char *)(h + 1); 4880 name_len = name[-1]; 4881 if (len > 5 && name_len < len+4) { 4882 addlog(": "); 4883 sppp_print_string(name, name_len); 4884 } 4885 addlog("\n"); 4886 } 4887 4888 if (h->ident != sp->scp[IDX_PAP].confid) { 4889 if (debug) { 4890 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4891 ifp->if_xname, pap.name, 4892 h->ident, sp->scp[IDX_PAP].rconfid); 4893 } 4894 if_statinc(ifp, if_ierrors); 4895 break; 4896 } 4897 4898 x = splnet(); 4899 sp->pp_auth_failures = 0; 4900 sp->pp_flags &= ~PP_NEEDAUTH; 4901 splx(x); 4902 4903 /* we are not authenticator, generate a dummy RCR+ event */ 4904 if (!ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_SERV)) { 4905 sp->scp[IDX_PAP].rcr_type = CONF_ACK; 4906 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rcr); 4907 } 4908 4909 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rca); 4910 break; 4911 4912 case PAP_NAK: 4913 if (debug) { 4914 log(LOG_INFO, "%s: pap failure", 4915 ifp->if_xname); 4916 name = 1 + (u_char *)(h + 1); 4917 name_len = name[-1]; 4918 if (len > 5 && name_len < len+4) { 4919 addlog(": "); 4920 sppp_print_string(name, name_len); 4921 } 4922 addlog("\n"); 4923 } else 4924 log(LOG_INFO, "%s: pap failure\n", 4925 ifp->if_xname); 4926 4927 if (h->ident != sp->scp[IDX_PAP].confid) { 4928 if (debug) { 4929 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4930 ifp->if_xname, pap.name, 4931 h->ident, sp->scp[IDX_PAP].rconfid); 4932 } 4933 if_statinc(ifp, if_ierrors); 4934 break; 4935 } 4936 4937 sp->pp_auth_failures++; 4938 /* 4939 * await LCP shutdown by authenticator, 4940 * so we don't have to enqueue sc->scp[IDX_PAP].work_rcn 4941 */ 4942 break; 4943 4944 default: 4945 /* Unknown PAP packet type -- ignore. */ 4946 if (debug) { 4947 log(LOG_DEBUG, "%s: pap corrupted input " 4948 "<0x%x id=0x%x len=%d", 4949 ifp->if_xname, 4950 h->type, h->ident, ntohs(h->len)); 4951 if (len > 4) 4952 sppp_print_bytes((u_char *)(h + 1), len - 4); 4953 addlog(">\n"); 4954 } 4955 break; 4956 } 4957 4958 SPPP_UNLOCK(sp); 4959 } 4960 4961 static void 4962 sppp_pap_init(struct sppp *sp) 4963 { 4964 4965 KASSERT(SPPP_WLOCKED(sp)); 4966 4967 sp->scp[IDX_PAP].state = STATE_INITIAL; 4968 sp->scp[IDX_PAP].fail_counter = 0; 4969 sp->scp[IDX_PAP].seq = 0; 4970 sp->scp[IDX_PAP].rseq = 0; 4971 sppp_cp_init(&pap, sp); 4972 } 4973 4974 static void 4975 sppp_pap_tlu(struct sppp *sp) 4976 { 4977 STDDCL; 4978 int x; 4979 4980 sp->scp[IDX_PAP].rst_counter = sp->lcp.max_configure; 4981 4982 if (debug) 4983 log(LOG_DEBUG, "%s: %s tlu\n", 4984 ifp->if_xname, pap.name); 4985 4986 x = splnet(); 4987 sp->pp_auth_failures = 0; 4988 splx(x); 4989 4990 if (sp->pp_phase < SPPP_PHASE_NETWORK) 4991 sppp_phase_network(sp); 4992 } 4993 4994 static void 4995 sppp_pap_scr(struct sppp *sp) 4996 { 4997 u_char idlen, pwdlen; 4998 4999 KASSERT(SPPP_WLOCKED(sp)); 5000 5001 if (ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_PEER) && 5002 sp->scp[IDX_PAP].state != STATE_ACK_RCVD) { 5003 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 5004 log(LOG_DEBUG, "%s: couldn't send PAP_REQ " 5005 "because of no name or no secret\n", 5006 sp->pp_if.if_xname); 5007 } else { 5008 sp->scp[IDX_PAP].confid = ++sp->scp[IDX_PAP].seq; 5009 pwdlen = sp->myauth.secret_len; 5010 idlen = sp->myauth.name_len; 5011 5012 sppp_auth_send(&pap, sp, PAP_REQ, sp->scp[IDX_PAP].confid, 5013 sizeof idlen, (const char *)&idlen, 5014 idlen, sp->myauth.name, 5015 sizeof pwdlen, (const char *)&pwdlen, 5016 pwdlen, sp->myauth.secret, 5017 0); 5018 } 5019 } 5020 } 5021 5022 /* 5023 * Random miscellaneous functions. 5024 */ 5025 5026 /* 5027 * Send a PAP or CHAP proto packet. 5028 * 5029 * Varadic function, each of the elements for the ellipsis is of type 5030 * ``size_t mlen, const u_char *msg''. Processing will stop iff 5031 * mlen == 0. 5032 * NOTE: never declare variadic functions with types subject to type 5033 * promotion (i.e. u_char). This is asking for big trouble depending 5034 * on the architecture you are on... 5035 */ 5036 5037 static void 5038 sppp_auth_send(const struct cp *cp, struct sppp *sp, 5039 unsigned int type, unsigned int id, 5040 ...) 5041 { 5042 STDDCL; 5043 struct lcp_header *lh; 5044 struct mbuf *m; 5045 u_char *p; 5046 int len; 5047 size_t pkthdrlen; 5048 unsigned int mlen; 5049 const char *msg; 5050 va_list ap; 5051 5052 KASSERT(SPPP_WLOCKED(sp)); 5053 5054 MGETHDR(m, M_DONTWAIT, MT_DATA); 5055 if (! m) 5056 return; 5057 m_reset_rcvif(m); 5058 5059 if (sp->pp_flags & PP_NOFRAMING) { 5060 *mtod(m, uint16_t *) = htons(cp->proto); 5061 pkthdrlen = 2; 5062 lh = (struct lcp_header *)(mtod(m, uint8_t *)+2); 5063 } else { 5064 struct ppp_header *h; 5065 h = mtod(m, struct ppp_header *); 5066 h->address = PPP_ALLSTATIONS; /* broadcast address */ 5067 h->control = PPP_UI; /* Unnumbered Info */ 5068 h->protocol = htons(cp->proto); 5069 pkthdrlen = PPP_HEADER_LEN; 5070 5071 lh = (struct lcp_header *)(h + 1); 5072 } 5073 5074 lh->type = type; 5075 lh->ident = id; 5076 p = (u_char *)(lh + 1); 5077 5078 va_start(ap, id); 5079 len = 0; 5080 5081 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 5082 msg = va_arg(ap, const char *); 5083 len += mlen; 5084 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 5085 va_end(ap); 5086 m_freem(m); 5087 return; 5088 } 5089 5090 memcpy(p, msg, mlen); 5091 p += mlen; 5092 } 5093 va_end(ap); 5094 5095 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 5096 lh->len = htons(LCP_HEADER_LEN + len); 5097 5098 if (debug) { 5099 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 5100 ifp->if_xname, cp->name, 5101 sppp_auth_type_name(cp->proto, lh->type), 5102 lh->ident, ntohs(lh->len)); 5103 if (len) 5104 sppp_print_bytes((u_char *)(lh + 1), len); 5105 addlog(">\n"); 5106 } 5107 if (IF_QFULL(&sp->pp_cpq)) { 5108 IF_DROP(&sp->pp_fastq); 5109 IF_DROP(&ifp->if_snd); 5110 m_freem(m); 5111 if_statinc(ifp, if_oerrors); 5112 return; 5113 } 5114 5115 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 5116 IF_ENQUEUE(&sp->pp_cpq, m); 5117 5118 if (! (ifp->if_flags & IFF_OACTIVE)) { 5119 SPPP_UNLOCK(sp); 5120 if_start_lock(ifp); 5121 SPPP_LOCK(sp, RW_WRITER); 5122 } 5123 } 5124 5125 static int 5126 sppp_auth_role(const struct cp *cp, struct sppp *sp) 5127 { 5128 int role; 5129 5130 role = SPPP_AUTH_NOROLE; 5131 5132 if (sp->hisauth.proto == cp->proto && 5133 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) 5134 SET(role, SPPP_AUTH_SERV); 5135 5136 if (sp->myauth.proto == cp->proto) 5137 SET(role, SPPP_AUTH_PEER); 5138 5139 return role; 5140 } 5141 5142 static void 5143 sppp_auth_to_event(struct sppp *sp, void *xcp) 5144 { 5145 const struct cp *cp = xcp; 5146 bool override; 5147 int state; 5148 STDDCL; 5149 5150 KASSERT(SPPP_WLOCKED(sp)); 5151 5152 override = false; 5153 state = sp->scp[cp->protoidx].state; 5154 5155 if (sp->scp[cp->protoidx].rst_counter > 0) { 5156 /* override TO+ event */ 5157 switch (state) { 5158 case STATE_OPENED: 5159 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 5160 override = true; 5161 sp->chap.rechallenging = true; 5162 sp->chap.response_rcvd = false; 5163 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 5164 cp->scr(sp); 5165 } 5166 break; 5167 5168 case STATE_ACK_RCVD: 5169 override = true; 5170 cp->scr(sp); 5171 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 5172 break; 5173 } 5174 } 5175 5176 if (override) { 5177 if (debug) 5178 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 5179 ifp->if_xname, cp->name, 5180 sppp_state_name(state), 5181 sp->scp[cp->protoidx].rst_counter); 5182 sp->scp[cp->protoidx].rst_counter--; 5183 } else { 5184 sppp_to_event(sp, xcp); 5185 } 5186 } 5187 5188 static void 5189 sppp_auth_sca_scn(const struct cp *cp, struct sppp *sp) 5190 { 5191 static const char *succmsg = "Welcome!"; 5192 static const char *failmsg = "Failed..."; 5193 const char *msg; 5194 u_char type, rconfid, mlen; 5195 5196 KASSERT(SPPP_WLOCKED(sp)); 5197 5198 if (!ISSET(sppp_auth_role(cp, sp), SPPP_AUTH_SERV)) 5199 return; 5200 5201 rconfid = sp->scp[cp->protoidx].rconfid; 5202 5203 if (sp->scp[cp->protoidx].rcr_type == CONF_ACK) { 5204 type = cp->proto == PPP_CHAP ? CHAP_SUCCESS : PAP_ACK; 5205 msg = succmsg; 5206 mlen = sizeof(succmsg) - 1; 5207 5208 sp->pp_auth_failures = 0; 5209 } else { 5210 type = cp->proto == PPP_CHAP ? CHAP_FAILURE : PAP_NAK; 5211 msg = failmsg; 5212 mlen = sizeof(failmsg) - 1; 5213 5214 /* shutdown LCP if auth failed */ 5215 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5216 sp->pp_auth_failures++; 5217 } 5218 5219 sppp_auth_send(cp, sp, type, rconfid, 5220 mlen, (const u_char *)msg, 0); 5221 } 5222 5223 /* 5224 * Send keepalive packets, every 10 seconds. 5225 */ 5226 static void 5227 sppp_keepalive(void *dummy) 5228 { 5229 struct sppp *sp; 5230 int s; 5231 time_t now; 5232 5233 SPPPQ_LOCK(); 5234 5235 s = splnet(); 5236 now = time_uptime; 5237 for (sp=spppq; sp; sp=sp->pp_next) { 5238 struct ifnet *ifp = NULL; 5239 5240 SPPP_LOCK(sp, RW_WRITER); 5241 ifp = &sp->pp_if; 5242 5243 /* check idle timeout */ 5244 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 5245 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 5246 /* idle timeout is enabled for this interface */ 5247 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 5248 if (ifp->if_flags & IFF_DEBUG) 5249 printf("%s: no activity for %lu seconds\n", 5250 sp->pp_if.if_xname, 5251 (unsigned long)(now-sp->pp_last_activity)); 5252 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5253 SPPP_UNLOCK(sp); 5254 continue; 5255 } 5256 } 5257 5258 /* Keepalive mode disabled or channel down? */ 5259 if (! (sp->pp_flags & PP_KEEPALIVE) || 5260 ! (ifp->if_flags & IFF_RUNNING)) { 5261 SPPP_UNLOCK(sp); 5262 continue; 5263 } 5264 5265 5266 /* No keepalive in PPP mode if LCP not opened yet. */ 5267 if (! (sp->pp_flags & PP_CISCO) && 5268 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 5269 SPPP_UNLOCK(sp); 5270 continue; 5271 } 5272 5273 /* No echo reply, but maybe user data passed through? */ 5274 if ((now - sp->pp_last_receive) < sp->pp_max_noreceive) { 5275 sp->pp_alivecnt = 0; 5276 SPPP_UNLOCK(sp); 5277 continue; 5278 } 5279 5280 if (sp->pp_alivecnt >= sp->pp_maxalive) { 5281 /* No keepalive packets got. Stop the interface. */ 5282 sppp_wq_add(sp->wq_cp, &sp->work_ifdown); 5283 5284 if (! (sp->pp_flags & PP_CISCO)) { 5285 printf("%s: LCP keepalive timed out, going to restart the connection\n", 5286 ifp->if_xname); 5287 sp->pp_alivecnt = 0; 5288 5289 /* we are down, close all open protocols */ 5290 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5291 5292 /* And now prepare LCP to reestablish the link, if configured to do so. */ 5293 sp->lcp.reestablish = true; 5294 5295 SPPP_UNLOCK(sp); 5296 continue; 5297 } 5298 } 5299 if (sp->pp_alivecnt < sp->pp_maxalive) 5300 ++sp->pp_alivecnt; 5301 if (sp->pp_flags & PP_CISCO) 5302 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, 5303 ++sp->scp[IDX_LCP].seq, sp->scp[IDX_LCP].rseq); 5304 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 5305 int32_t nmagic = htonl(sp->lcp.magic); 5306 sp->lcp.echoid = ++sp->scp[IDX_LCP].seq; 5307 sppp_cp_send(sp, PPP_LCP, ECHO_REQ, 5308 sp->lcp.echoid, 4, &nmagic); 5309 } 5310 5311 SPPP_UNLOCK(sp); 5312 } 5313 splx(s); 5314 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 5315 5316 SPPPQ_UNLOCK(); 5317 } 5318 5319 #ifdef INET 5320 /* 5321 * Get both IP addresses. 5322 */ 5323 static void 5324 sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, uint32_t *srcmask) 5325 { 5326 struct ifnet *ifp = &sp->pp_if; 5327 struct ifaddr *ifa; 5328 struct sockaddr_in *si, *sm; 5329 uint32_t ssrc, ddst; 5330 int s; 5331 struct psref psref; 5332 5333 sm = NULL; 5334 ssrc = ddst = 0; 5335 /* 5336 * Pick the first AF_INET address from the list, 5337 * aliases don't make any sense on a p2p link anyway. 5338 */ 5339 si = 0; 5340 s = pserialize_read_enter(); 5341 IFADDR_READER_FOREACH(ifa, ifp) { 5342 if (ifa->ifa_addr->sa_family == AF_INET) { 5343 si = (struct sockaddr_in *)ifa->ifa_addr; 5344 sm = (struct sockaddr_in *)ifa->ifa_netmask; 5345 if (si) { 5346 ifa_acquire(ifa, &psref); 5347 break; 5348 } 5349 } 5350 } 5351 pserialize_read_exit(s); 5352 if (ifa) { 5353 if (si && si->sin_addr.s_addr) { 5354 ssrc = si->sin_addr.s_addr; 5355 if (srcmask) 5356 *srcmask = ntohl(sm->sin_addr.s_addr); 5357 } 5358 5359 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 5360 if (si && si->sin_addr.s_addr) 5361 ddst = si->sin_addr.s_addr; 5362 ifa_release(ifa, &psref); 5363 } 5364 5365 if (dst) *dst = ntohl(ddst); 5366 if (src) *src = ntohl(ssrc); 5367 } 5368 5369 /* 5370 * Set IP addresses. Must be called at splnet. 5371 * If an address is 0, leave it the way it is. 5372 */ 5373 static void 5374 sppp_set_ip_addrs_work(struct work *wk, struct sppp *sp) 5375 { 5376 STDDCL; 5377 struct ifaddr *ifa; 5378 struct sockaddr_in *si, *dest; 5379 uint32_t myaddr = 0, hisaddr = 0; 5380 int s; 5381 5382 IFNET_LOCK(ifp); 5383 5384 /* 5385 * Pick the first AF_INET address from the list, 5386 * aliases don't make any sense on a p2p link anyway. 5387 */ 5388 si = dest = NULL; 5389 s = pserialize_read_enter(); 5390 IFADDR_READER_FOREACH(ifa, ifp) { 5391 if (ifa->ifa_addr->sa_family == AF_INET) { 5392 si = (struct sockaddr_in *)ifa->ifa_addr; 5393 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5394 break; 5395 } 5396 } 5397 pserialize_read_exit(s); 5398 5399 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 5400 myaddr = sp->ipcp.req_myaddr; 5401 else if (si != NULL) 5402 myaddr = ntohl(si->sin_addr.s_addr); 5403 5404 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 5405 hisaddr = sp->ipcp.req_hisaddr; 5406 else if (dest != NULL) 5407 hisaddr = ntohl(dest->sin_addr.s_addr); 5408 5409 if (si != NULL && dest != NULL) { 5410 int error; 5411 struct sockaddr_in new_sin = *si; 5412 struct sockaddr_in new_dst = *dest; 5413 5414 if (myaddr != 0) 5415 new_sin.sin_addr.s_addr = htonl(myaddr); 5416 if (hisaddr != 0) { 5417 new_dst.sin_addr.s_addr = htonl(hisaddr); 5418 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) 5419 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 5420 } 5421 5422 in_addrhash_remove(ifatoia(ifa)); 5423 5424 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5425 5426 in_addrhash_insert(ifatoia(ifa)); 5427 5428 if (debug && error) 5429 { 5430 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5431 ifp->if_xname, __func__, error); 5432 } 5433 if (!error) { 5434 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5435 } 5436 } 5437 5438 if (ifp->if_mtu > sp->lcp.their_mru) { 5439 sp->pp_saved_mtu = ifp->if_mtu; 5440 ifp->if_mtu = sp->lcp.their_mru; 5441 if (debug) 5442 log(LOG_DEBUG, 5443 "%s: setting MTU to %" PRIu64 " bytes\n", 5444 ifp->if_xname, ifp->if_mtu); 5445 } 5446 5447 IFNET_UNLOCK(ifp); 5448 5449 sppp_notify_con(sp); 5450 } 5451 5452 static void 5453 sppp_set_ip_addrs(struct sppp *sp) 5454 { 5455 struct ifnet *ifp = &sp->pp_if; 5456 5457 if (!pcq_put(sp->ipcp.update_addrs_q, (void *)IPCP_SET_ADDRS)) { 5458 log(LOG_WARNING, "%s: cannot enqueued, ignore sppp_clear_ip_addrs\n", 5459 ifp->if_xname); 5460 return; 5461 } 5462 5463 if (atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1) == 1) 5464 return; 5465 5466 workqueue_enqueue(sp->ipcp.update_addrs_wq, &sp->ipcp.update_addrs_wk, NULL); 5467 } 5468 5469 /* 5470 * Clear IP addresses. Must be called at splnet. 5471 */ 5472 static void 5473 sppp_clear_ip_addrs_work(struct work *wk, struct sppp *sp) 5474 { 5475 STDDCL; 5476 struct ifaddr *ifa; 5477 struct sockaddr_in *si, *dest; 5478 int s; 5479 5480 IFNET_LOCK(ifp); 5481 5482 /* 5483 * Pick the first AF_INET address from the list, 5484 * aliases don't make any sense on a p2p link anyway. 5485 */ 5486 si = dest = NULL; 5487 s = pserialize_read_enter(); 5488 IFADDR_READER_FOREACH(ifa, ifp) { 5489 if (ifa->ifa_addr->sa_family == AF_INET) { 5490 si = (struct sockaddr_in *)ifa->ifa_addr; 5491 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5492 break; 5493 } 5494 } 5495 pserialize_read_exit(s); 5496 5497 if (si != NULL) { 5498 struct sockaddr_in new_sin = *si; 5499 struct sockaddr_in new_dst = *dest; 5500 int error; 5501 5502 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 5503 new_sin.sin_addr.s_addr = 0; 5504 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 5505 new_dst.sin_addr.s_addr = sp->ipcp.saved_hisaddr; 5506 5507 in_addrhash_remove(ifatoia(ifa)); 5508 5509 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5510 5511 in_addrhash_insert(ifatoia(ifa)); 5512 5513 if (debug && error) 5514 { 5515 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5516 ifp->if_xname, __func__, error); 5517 } 5518 if (!error) { 5519 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5520 } 5521 } 5522 5523 if (sp->pp_saved_mtu > 0) { 5524 ifp->if_mtu = sp->pp_saved_mtu; 5525 sp->pp_saved_mtu = 0; 5526 if (debug) 5527 log(LOG_DEBUG, 5528 "%s: resetting MTU to %" PRIu64 " bytes\n", 5529 ifp->if_xname, ifp->if_mtu); 5530 } 5531 5532 IFNET_UNLOCK(ifp); 5533 } 5534 5535 static void 5536 sppp_clear_ip_addrs(struct sppp *sp) 5537 { 5538 struct ifnet *ifp = &sp->pp_if; 5539 5540 if (!pcq_put(sp->ipcp.update_addrs_q, (void *)IPCP_CLEAR_ADDRS)) { 5541 log(LOG_WARNING, "%s: cannot enqueued, ignore sppp_clear_ip_addrs\n", 5542 ifp->if_xname); 5543 return; 5544 } 5545 5546 if (atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1) == 1) 5547 return; 5548 5549 workqueue_enqueue(sp->ipcp.update_addrs_wq, &sp->ipcp.update_addrs_wk, NULL); 5550 } 5551 5552 static void 5553 sppp_update_ip_addrs_work(struct work *wk, void *arg) 5554 { 5555 struct sppp *sp = arg; 5556 void *work; 5557 5558 atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 0); 5559 5560 while ((work = pcq_get(sp->ipcp.update_addrs_q)) != NULL) { 5561 int update = (intptr_t)work; 5562 5563 if (update == IPCP_SET_ADDRS) 5564 sppp_set_ip_addrs_work(wk, sp); 5565 else if (update == IPCP_CLEAR_ADDRS) 5566 sppp_clear_ip_addrs_work(wk, sp); 5567 } 5568 } 5569 #endif 5570 5571 #ifdef INET6 5572 /* 5573 * Get both IPv6 addresses. 5574 */ 5575 static void 5576 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 5577 struct in6_addr *srcmask) 5578 { 5579 struct ifnet *ifp = &sp->pp_if; 5580 struct ifaddr *ifa; 5581 struct sockaddr_in6 *si, *sm; 5582 struct in6_addr ssrc, ddst; 5583 int s; 5584 struct psref psref; 5585 5586 sm = NULL; 5587 memset(&ssrc, 0, sizeof(ssrc)); 5588 memset(&ddst, 0, sizeof(ddst)); 5589 /* 5590 * Pick the first link-local AF_INET6 address from the list, 5591 * aliases don't make any sense on a p2p link anyway. 5592 */ 5593 si = 0; 5594 s = pserialize_read_enter(); 5595 IFADDR_READER_FOREACH(ifa, ifp) { 5596 if (ifa->ifa_addr->sa_family == AF_INET6) { 5597 si = (struct sockaddr_in6 *)ifa->ifa_addr; 5598 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 5599 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) { 5600 ifa_acquire(ifa, &psref); 5601 break; 5602 } 5603 } 5604 } 5605 pserialize_read_exit(s); 5606 5607 if (ifa) { 5608 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 5609 memcpy(&ssrc, &si->sin6_addr, sizeof(ssrc)); 5610 if (srcmask) { 5611 memcpy(srcmask, &sm->sin6_addr, 5612 sizeof(*srcmask)); 5613 } 5614 } 5615 5616 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 5617 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 5618 memcpy(&ddst, &si->sin6_addr, sizeof(ddst)); 5619 ifa_release(ifa, &psref); 5620 } 5621 5622 if (dst) 5623 memcpy(dst, &ddst, sizeof(*dst)); 5624 if (src) 5625 memcpy(src, &ssrc, sizeof(*src)); 5626 } 5627 5628 #ifdef IPV6CP_MYIFID_DYN 5629 /* 5630 * Generate random ifid. 5631 */ 5632 static void 5633 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 5634 { 5635 /* TBD */ 5636 } 5637 5638 /* 5639 * Set my IPv6 address. Must be called at splnet. 5640 */ 5641 static void 5642 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 5643 { 5644 STDDCL; 5645 struct ifaddr *ifa; 5646 struct sockaddr_in6 *sin6; 5647 int s; 5648 struct psref psref; 5649 5650 IFNET_LOCK(ifp); 5651 5652 /* 5653 * Pick the first link-local AF_INET6 address from the list, 5654 * aliases don't make any sense on a p2p link anyway. 5655 */ 5656 5657 sin6 = NULL; 5658 s = pserialize_read_enter(); 5659 IFADDR_READER_FOREACH(ifa, ifp) 5660 { 5661 if (ifa->ifa_addr->sa_family == AF_INET6) 5662 { 5663 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 5664 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 5665 ifa_acquire(ifa, &psref); 5666 break; 5667 } 5668 } 5669 } 5670 pserialize_read_exit(s); 5671 5672 if (ifa && sin6) 5673 { 5674 int error; 5675 struct sockaddr_in6 new_sin6 = *sin6; 5676 5677 memcpy(&new_sin6.sin6_addr, src, sizeof(new_sin6.sin6_addr)); 5678 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 5679 if (debug && error) 5680 { 5681 log(LOG_DEBUG, "%s: %s: in6_ifinit failed, error=%d\n", 5682 ifp->if_xname, __func__, error); 5683 } 5684 if (!error) { 5685 pfil_run_addrhooks(if_pfil, SIOCAIFADDR_IN6, ifa); 5686 } 5687 ifa_release(ifa, &psref); 5688 } 5689 5690 IFNET_UNLOCK(ifp); 5691 } 5692 #endif 5693 5694 /* 5695 * Suggest a candidate address to be used by peer. 5696 */ 5697 static void 5698 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 5699 { 5700 struct in6_addr myaddr; 5701 struct timeval tv; 5702 5703 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 5704 5705 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 5706 microtime(&tv); 5707 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 5708 myaddr.s6_addr[14] ^= 0xff; 5709 myaddr.s6_addr[15] ^= 0xff; 5710 } else { 5711 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 5712 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 5713 } 5714 if (suggest) 5715 memcpy(suggest, &myaddr, sizeof(myaddr)); 5716 } 5717 #endif /*INET6*/ 5718 5719 /* 5720 * Process ioctl requests specific to the PPP interface. 5721 * Permissions have already been checked. 5722 */ 5723 static int 5724 sppp_params(struct sppp *sp, u_long cmd, void *data) 5725 { 5726 switch (cmd) { 5727 case SPPPGETAUTHCFG: 5728 { 5729 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5730 int error; 5731 size_t len; 5732 5733 SPPP_LOCK(sp, RW_READER); 5734 5735 cfg->myauthflags = sp->myauth.flags; 5736 cfg->hisauthflags = sp->hisauth.flags; 5737 strlcpy(cfg->ifname, sp->pp_if.if_xname, sizeof(cfg->ifname)); 5738 cfg->hisauth = 0; 5739 if (sp->hisauth.proto) 5740 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5741 cfg->myauth = 0; 5742 if (sp->myauth.proto) 5743 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5744 if (cfg->myname_length == 0) { 5745 if (sp->myauth.name != NULL) 5746 cfg->myname_length = sp->myauth.name_len + 1; 5747 } else { 5748 if (sp->myauth.name == NULL) { 5749 cfg->myname_length = 0; 5750 } else { 5751 len = sp->myauth.name_len + 1; 5752 5753 5754 if (cfg->myname_length < len) { 5755 SPPP_UNLOCK(sp); 5756 return (ENAMETOOLONG); 5757 } 5758 error = copyout(sp->myauth.name, cfg->myname, len); 5759 if (error) { 5760 SPPP_UNLOCK(sp); 5761 return error; 5762 } 5763 } 5764 } 5765 if (cfg->hisname_length == 0) { 5766 if (sp->hisauth.name != NULL) 5767 cfg->hisname_length = sp->hisauth.name_len + 1; 5768 } else { 5769 if (sp->hisauth.name == NULL) { 5770 cfg->hisname_length = 0; 5771 } else { 5772 len = sp->hisauth.name_len + 1; 5773 5774 if (cfg->hisname_length < len) { 5775 SPPP_UNLOCK(sp); 5776 return (ENAMETOOLONG); 5777 } 5778 error = copyout(sp->hisauth.name, cfg->hisname, len); 5779 if (error) { 5780 SPPP_UNLOCK(sp); 5781 return error; 5782 } 5783 } 5784 } 5785 SPPP_UNLOCK(sp); 5786 } 5787 break; 5788 case SPPPSETAUTHCFG: 5789 { 5790 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5791 int error; 5792 5793 SPPP_LOCK(sp, RW_WRITER); 5794 5795 if (sp->myauth.name) { 5796 free(sp->myauth.name, M_DEVBUF); 5797 sp->myauth.name = NULL; 5798 } 5799 if (sp->myauth.secret) { 5800 free(sp->myauth.secret, M_DEVBUF); 5801 sp->myauth.secret = NULL; 5802 } 5803 if (sp->hisauth.name) { 5804 free(sp->hisauth.name, M_DEVBUF); 5805 sp->hisauth.name = NULL; 5806 } 5807 if (sp->hisauth.secret) { 5808 free(sp->hisauth.secret, M_DEVBUF); 5809 sp->hisauth.secret = NULL; 5810 } 5811 5812 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5813 if (cfg->hisname_length >= MCLBYTES) { 5814 SPPP_UNLOCK(sp); 5815 return (ENAMETOOLONG); 5816 } 5817 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5818 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5819 if (error) { 5820 free(sp->hisauth.name, M_DEVBUF); 5821 sp->hisauth.name = NULL; 5822 SPPP_UNLOCK(sp); 5823 return error; 5824 } 5825 sp->hisauth.name_len = cfg->hisname_length - 1; 5826 sp->hisauth.name[sp->hisauth.name_len] = 0; 5827 } 5828 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5829 if (cfg->hissecret_length >= MCLBYTES) { 5830 SPPP_UNLOCK(sp); 5831 return (ENAMETOOLONG); 5832 } 5833 sp->hisauth.secret = malloc(cfg->hissecret_length, 5834 M_DEVBUF, M_WAITOK); 5835 error = copyin(cfg->hissecret, sp->hisauth.secret, 5836 cfg->hissecret_length); 5837 if (error) { 5838 free(sp->hisauth.secret, M_DEVBUF); 5839 sp->hisauth.secret = NULL; 5840 SPPP_UNLOCK(sp); 5841 return error; 5842 } 5843 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5844 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5845 } 5846 if (cfg->myname != NULL && cfg->myname_length > 0) { 5847 if (cfg->myname_length >= MCLBYTES) { 5848 SPPP_UNLOCK(sp); 5849 return (ENAMETOOLONG); 5850 } 5851 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5852 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5853 if (error) { 5854 free(sp->myauth.name, M_DEVBUF); 5855 sp->myauth.name = NULL; 5856 SPPP_UNLOCK(sp); 5857 return error; 5858 } 5859 sp->myauth.name_len = cfg->myname_length - 1; 5860 sp->myauth.name[sp->myauth.name_len] = 0; 5861 } 5862 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5863 if (cfg->mysecret_length >= MCLBYTES) { 5864 SPPP_UNLOCK(sp); 5865 return (ENAMETOOLONG); 5866 } 5867 sp->myauth.secret = malloc(cfg->mysecret_length, 5868 M_DEVBUF, M_WAITOK); 5869 error = copyin(cfg->mysecret, sp->myauth.secret, 5870 cfg->mysecret_length); 5871 if (error) { 5872 free(sp->myauth.secret, M_DEVBUF); 5873 sp->myauth.secret = NULL; 5874 SPPP_UNLOCK(sp); 5875 return error; 5876 } 5877 sp->myauth.secret_len = cfg->mysecret_length - 1; 5878 sp->myauth.secret[sp->myauth.secret_len] = 0; 5879 } 5880 sp->myauth.flags = cfg->myauthflags; 5881 if (cfg->myauth) 5882 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5883 sp->hisauth.flags = cfg->hisauthflags; 5884 if (cfg->hisauth) 5885 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5886 sp->pp_auth_failures = 0; 5887 if (sp->hisauth.proto != 0) 5888 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 5889 else 5890 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 5891 5892 SPPP_UNLOCK(sp); 5893 } 5894 break; 5895 case SPPPGETLCPCFG: 5896 { 5897 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5898 5899 SPPP_LOCK(sp, RW_READER); 5900 lcpp->lcp_timeout = sp->lcp.timeout; 5901 SPPP_UNLOCK(sp); 5902 } 5903 break; 5904 case SPPPSETLCPCFG: 5905 { 5906 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5907 5908 SPPP_LOCK(sp, RW_WRITER); 5909 sp->lcp.timeout = lcpp->lcp_timeout; 5910 SPPP_UNLOCK(sp); 5911 } 5912 break; 5913 case SPPPGETSTATUS: 5914 { 5915 struct spppstatus *status = (struct spppstatus *)data; 5916 5917 SPPP_LOCK(sp, RW_READER); 5918 status->phase = sp->pp_phase; 5919 SPPP_UNLOCK(sp); 5920 } 5921 break; 5922 case SPPPGETSTATUSNCP: 5923 { 5924 struct spppstatusncp *status = (struct spppstatusncp *)data; 5925 5926 SPPP_LOCK(sp, RW_READER); 5927 status->phase = sp->pp_phase; 5928 status->ncpup = sppp_cp_check(sp, CP_NCP); 5929 SPPP_UNLOCK(sp); 5930 } 5931 break; 5932 case SPPPGETIDLETO: 5933 { 5934 struct spppidletimeout *to = (struct spppidletimeout *)data; 5935 5936 SPPP_LOCK(sp, RW_READER); 5937 to->idle_seconds = sp->pp_idle_timeout; 5938 SPPP_UNLOCK(sp); 5939 } 5940 break; 5941 case SPPPSETIDLETO: 5942 { 5943 struct spppidletimeout *to = (struct spppidletimeout *)data; 5944 5945 SPPP_LOCK(sp, RW_WRITER); 5946 sp->pp_idle_timeout = to->idle_seconds; 5947 SPPP_UNLOCK(sp); 5948 } 5949 break; 5950 case SPPPSETAUTHFAILURE: 5951 { 5952 struct spppauthfailuresettings *afsettings = 5953 (struct spppauthfailuresettings *)data; 5954 5955 SPPP_LOCK(sp, RW_WRITER); 5956 sp->pp_max_auth_fail = afsettings->max_failures; 5957 sp->pp_auth_failures = 0; 5958 SPPP_UNLOCK(sp); 5959 } 5960 break; 5961 case SPPPGETAUTHFAILURES: 5962 { 5963 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5964 5965 SPPP_LOCK(sp, RW_READER); 5966 stats->auth_failures = sp->pp_auth_failures; 5967 stats->max_failures = sp->pp_max_auth_fail; 5968 SPPP_UNLOCK(sp); 5969 } 5970 break; 5971 case SPPPSETDNSOPTS: 5972 { 5973 struct spppdnssettings *req = (struct spppdnssettings *)data; 5974 5975 SPPP_LOCK(sp, RW_WRITER); 5976 sp->query_dns = req->query_dns & 3; 5977 SPPP_UNLOCK(sp); 5978 } 5979 break; 5980 case SPPPGETDNSOPTS: 5981 { 5982 struct spppdnssettings *req = (struct spppdnssettings *)data; 5983 5984 SPPP_LOCK(sp, RW_READER); 5985 req->query_dns = sp->query_dns; 5986 SPPP_UNLOCK(sp); 5987 } 5988 break; 5989 case SPPPGETDNSADDRS: 5990 { 5991 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; 5992 5993 SPPP_LOCK(sp, RW_READER); 5994 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5995 SPPP_UNLOCK(sp); 5996 } 5997 break; 5998 case SPPPGETKEEPALIVE: 5999 { 6000 struct spppkeepalivesettings *settings = 6001 (struct spppkeepalivesettings*)data; 6002 6003 SPPP_LOCK(sp, RW_READER); 6004 settings->maxalive = sp->pp_maxalive; 6005 settings->max_noreceive = sp->pp_max_noreceive; 6006 SPPP_UNLOCK(sp); 6007 } 6008 break; 6009 case SPPPSETKEEPALIVE: 6010 { 6011 struct spppkeepalivesettings *settings = 6012 (struct spppkeepalivesettings*)data; 6013 6014 SPPP_LOCK(sp, RW_WRITER); 6015 sp->pp_maxalive = settings->maxalive; 6016 sp->pp_max_noreceive = settings->max_noreceive; 6017 SPPP_UNLOCK(sp); 6018 } 6019 break; 6020 default: 6021 { 6022 int ret; 6023 6024 MODULE_HOOK_CALL(sppp_params_50_hook, (sp, cmd, data), 6025 enosys(), ret); 6026 if (ret != ENOSYS) 6027 return ret; 6028 return (EINVAL); 6029 } 6030 } 6031 return (0); 6032 } 6033 6034 static void 6035 sppp_phase_network(struct sppp *sp) 6036 { 6037 int i; 6038 6039 KASSERT(SPPP_WLOCKED(sp)); 6040 6041 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 6042 6043 /* Notify NCPs now. */ 6044 for (i = 0; i < IDX_COUNT; i++) 6045 if ((cps[i])->flags & CP_NCP) 6046 sppp_wq_add(sp->wq_cp, &sp->scp[i].work_open); 6047 } 6048 6049 static const char * 6050 sppp_cp_type_name(u_char type) 6051 { 6052 static char buf[12]; 6053 switch (type) { 6054 case CONF_REQ: return "conf-req"; 6055 case CONF_ACK: return "conf-ack"; 6056 case CONF_NAK: return "conf-nak"; 6057 case CONF_REJ: return "conf-rej"; 6058 case TERM_REQ: return "term-req"; 6059 case TERM_ACK: return "term-ack"; 6060 case CODE_REJ: return "code-rej"; 6061 case PROTO_REJ: return "proto-rej"; 6062 case ECHO_REQ: return "echo-req"; 6063 case ECHO_REPLY: return "echo-reply"; 6064 case DISC_REQ: return "discard-req"; 6065 } 6066 snprintf(buf, sizeof(buf), "0x%x", type); 6067 return buf; 6068 } 6069 6070 static const char * 6071 sppp_auth_type_name(u_short proto, u_char type) 6072 { 6073 static char buf[32]; 6074 const char *name; 6075 6076 switch (proto) { 6077 case PPP_CHAP: 6078 switch (type) { 6079 case CHAP_CHALLENGE: return "challenge"; 6080 case CHAP_RESPONSE: return "response"; 6081 case CHAP_SUCCESS: return "success"; 6082 case CHAP_FAILURE: return "failure"; 6083 default: name = "chap"; break; 6084 } 6085 break; 6086 6087 case PPP_PAP: 6088 switch (type) { 6089 case PAP_REQ: return "req"; 6090 case PAP_ACK: return "ack"; 6091 case PAP_NAK: return "nak"; 6092 default: name = "pap"; break; 6093 } 6094 break; 6095 6096 default: 6097 name = "bad"; 6098 break; 6099 } 6100 6101 snprintf(buf, sizeof(buf), "%s(%#x) %#x", name, proto, type); 6102 return buf; 6103 } 6104 6105 static const char * 6106 sppp_lcp_opt_name(u_char opt) 6107 { 6108 static char buf[12]; 6109 switch (opt) { 6110 case LCP_OPT_MRU: return "mru"; 6111 case LCP_OPT_ASYNC_MAP: return "async-map"; 6112 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 6113 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 6114 case LCP_OPT_MAGIC: return "magic"; 6115 case LCP_OPT_PROTO_COMP: return "proto-comp"; 6116 case LCP_OPT_ADDR_COMP: return "addr-comp"; 6117 case LCP_OPT_SELF_DESC_PAD: return "sdpad"; 6118 case LCP_OPT_CALL_BACK: return "callback"; 6119 case LCP_OPT_COMPOUND_FRMS: return "cmpd-frms"; 6120 case LCP_OPT_MP_MRRU: return "mrru"; 6121 case LCP_OPT_MP_SSNHF: return "mp-ssnhf"; 6122 case LCP_OPT_MP_EID: return "mp-eid"; 6123 } 6124 snprintf(buf, sizeof(buf), "0x%x", opt); 6125 return buf; 6126 } 6127 6128 static const char * 6129 sppp_ipcp_opt_name(u_char opt) 6130 { 6131 static char buf[12]; 6132 switch (opt) { 6133 case IPCP_OPT_ADDRESSES: return "addresses"; 6134 case IPCP_OPT_COMPRESSION: return "compression"; 6135 case IPCP_OPT_ADDRESS: return "address"; 6136 } 6137 snprintf(buf, sizeof(buf), "0x%x", opt); 6138 return buf; 6139 } 6140 6141 #ifdef INET6 6142 static const char * 6143 sppp_ipv6cp_opt_name(u_char opt) 6144 { 6145 static char buf[12]; 6146 switch (opt) { 6147 case IPV6CP_OPT_IFID: return "ifid"; 6148 case IPV6CP_OPT_COMPRESSION: return "compression"; 6149 } 6150 snprintf(buf, sizeof(buf), "0x%x", opt); 6151 return buf; 6152 } 6153 #endif 6154 6155 static const char * 6156 sppp_state_name(int state) 6157 { 6158 switch (state) { 6159 case STATE_INITIAL: return "initial"; 6160 case STATE_STARTING: return "starting"; 6161 case STATE_CLOSED: return "closed"; 6162 case STATE_STOPPED: return "stopped"; 6163 case STATE_CLOSING: return "closing"; 6164 case STATE_STOPPING: return "stopping"; 6165 case STATE_REQ_SENT: return "req-sent"; 6166 case STATE_ACK_RCVD: return "ack-rcvd"; 6167 case STATE_ACK_SENT: return "ack-sent"; 6168 case STATE_OPENED: return "opened"; 6169 } 6170 return "illegal"; 6171 } 6172 6173 static const char * 6174 sppp_phase_name(int phase) 6175 { 6176 switch (phase) { 6177 case SPPP_PHASE_DEAD: return "dead"; 6178 case SPPP_PHASE_ESTABLISH: return "establish"; 6179 case SPPP_PHASE_TERMINATE: return "terminate"; 6180 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 6181 case SPPP_PHASE_NETWORK: return "network"; 6182 } 6183 return "illegal"; 6184 } 6185 6186 static const char * 6187 sppp_proto_name(u_short proto) 6188 { 6189 static char buf[12]; 6190 switch (proto) { 6191 case PPP_LCP: return "lcp"; 6192 case PPP_IPCP: return "ipcp"; 6193 case PPP_PAP: return "pap"; 6194 case PPP_CHAP: return "chap"; 6195 case PPP_IPV6CP: return "ipv6cp"; 6196 } 6197 snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto); 6198 return buf; 6199 } 6200 6201 static void 6202 sppp_print_bytes(const u_char *p, u_short len) 6203 { 6204 addlog(" %02x", *p++); 6205 while (--len > 0) 6206 addlog("-%02x", *p++); 6207 } 6208 6209 static void 6210 sppp_print_string(const char *p, u_short len) 6211 { 6212 u_char c; 6213 6214 while (len-- > 0) { 6215 c = *p++; 6216 /* 6217 * Print only ASCII chars directly. RFC 1994 recommends 6218 * using only them, but we don't rely on it. */ 6219 if (c < ' ' || c > '~') 6220 addlog("\\x%x", c); 6221 else 6222 addlog("%c", c); 6223 } 6224 } 6225 6226 static const char * 6227 sppp_dotted_quad(uint32_t addr) 6228 { 6229 static char s[16]; 6230 snprintf(s, sizeof(s), "%d.%d.%d.%d", 6231 (int)((addr >> 24) & 0xff), 6232 (int)((addr >> 16) & 0xff), 6233 (int)((addr >> 8) & 0xff), 6234 (int)(addr & 0xff)); 6235 return s; 6236 } 6237 6238 /* a dummy, used to drop uninteresting events */ 6239 static void 6240 sppp_null(struct sppp *unused) 6241 { 6242 /* do just nothing */ 6243 } 6244 6245 static void 6246 sppp_tls(const struct cp *cp, struct sppp *sp) 6247 { 6248 6249 /* notify lcp that is lower layer */ 6250 sp->lcp.protos |= (1 << cp->protoidx); 6251 6252 if (sp->scp[IDX_LCP].state == STATE_OPENED) 6253 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_up); 6254 } 6255 6256 static void 6257 sppp_tlf(const struct cp *cp, struct sppp *sp) 6258 { 6259 STDDCL; 6260 6261 if (debug) 6262 log(LOG_DEBUG, "%s: %s tlf\n", ifp->if_xname, cp->name); 6263 6264 /* notify lcp that is lower layer */ 6265 sp->lcp.protos &= ~(1 << cp->protoidx); 6266 6267 /* cleanup */ 6268 if (sp->scp[cp->protoidx].rcr_buf != NULL) { 6269 kmem_free(sp->scp[cp->protoidx].rcr_buf, 6270 sp->scp[cp->protoidx].rcr_blen); 6271 } 6272 6273 sp->scp[cp->protoidx].rcr_buf = NULL; 6274 sp->scp[cp->protoidx].rcr_blen = 0; 6275 sp->scp[cp->protoidx].rcr_rlen = 0; 6276 6277 sppp_lcp_check_and_close(sp); 6278 } 6279 6280 static void 6281 sppp_sca_scn(const struct cp *cp, struct sppp *sp) 6282 { 6283 STDDCL; 6284 u_char rconfid, type, rlen; 6285 void *buf; 6286 size_t blen; 6287 6288 rconfid = sp->scp[cp->protoidx].rconfid; 6289 type = sp->scp[cp->protoidx].rcr_type; 6290 buf = sp->scp[cp->protoidx].rcr_buf; 6291 rlen = sp->scp[cp->protoidx].rcr_rlen; 6292 blen = sp->scp[cp->protoidx].rcr_blen; 6293 6294 sp->scp[cp->protoidx].rcr_buf = NULL; 6295 sp->scp[cp->protoidx].rcr_blen = 0; 6296 6297 if (buf != NULL) { 6298 if (rlen > 0) { 6299 if (debug) { 6300 log(LOG_DEBUG, "%s: send %s\n", 6301 ifp->if_xname, sppp_cp_type_name(type)); 6302 } 6303 sppp_cp_send(sp, cp->proto, type, rconfid, rlen, buf); 6304 } 6305 kmem_free(buf, blen); 6306 } 6307 } 6308 6309 static void 6310 sppp_ifdown(struct sppp *sp, void *xcp __unused) 6311 { 6312 6313 SPPP_UNLOCK(sp); 6314 if_down(&sp->pp_if); 6315 IF_PURGE(&sp->pp_cpq); 6316 SPPP_LOCK(sp, RW_WRITER); 6317 } 6318 6319 /* 6320 * This file is large. Tell emacs to highlight it nevertheless. 6321 * 6322 * Local Variables: 6323 * hilit-auto-highlight-maxout: 120000 6324 * End: 6325 */ 6326 6327 /* 6328 * Module glue 6329 */ 6330 MODULE(MODULE_CLASS_MISC, sppp_subr, NULL); 6331 6332 static int 6333 sppp_subr_modcmd(modcmd_t cmd, void *arg) 6334 { 6335 switch (cmd) { 6336 case MODULE_CMD_INIT: 6337 case MODULE_CMD_FINI: 6338 return 0; 6339 case MODULE_CMD_STAT: 6340 case MODULE_CMD_AUTOUNLOAD: 6341 default: 6342 return ENOTTY; 6343 } 6344 } 6345 6346 static void 6347 sppp_notify_up(struct sppp *sp) 6348 { 6349 6350 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_up); 6351 } 6352 6353 static void 6354 sppp_notify_down(struct sppp *sp) 6355 { 6356 6357 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_down); 6358 } 6359 6360 static void 6361 sppp_notify_tls_wlocked(struct sppp *sp) 6362 { 6363 6364 KASSERT(SPPP_WLOCKED(sp)); 6365 6366 if (!sp->pp_tls) 6367 return; 6368 6369 SPPP_UNLOCK(sp); 6370 sp->pp_tls(sp); 6371 SPPP_LOCK(sp, RW_WRITER); 6372 } 6373 6374 static void 6375 sppp_notify_tlf_wlocked(struct sppp *sp) 6376 { 6377 6378 KASSERT(SPPP_WLOCKED(sp)); 6379 6380 if (!sp->pp_tlf) 6381 return; 6382 6383 SPPP_UNLOCK(sp); 6384 sp->pp_tlf(sp); 6385 SPPP_LOCK(sp, RW_WRITER); 6386 } 6387 6388 static void 6389 sppp_notify_con(struct sppp *sp) 6390 { 6391 6392 if (!sp->pp_con) 6393 return; 6394 6395 sp->pp_con(sp); 6396 } 6397 6398 #ifdef INET6 6399 static void 6400 sppp_notify_con_wlocked(struct sppp *sp) 6401 { 6402 6403 KASSERT(SPPP_WLOCKED(sp)); 6404 6405 SPPP_UNLOCK(sp); 6406 sppp_notify_con(sp); 6407 SPPP_LOCK(sp, RW_WRITER); 6408 6409 } 6410 #endif 6411 6412 static void 6413 sppp_notify_chg_wlocked(struct sppp *sp) 6414 { 6415 6416 KASSERT(SPPP_WLOCKED(sp)); 6417 6418 if (!sp->pp_chg) 6419 return; 6420 6421 SPPP_UNLOCK(sp); 6422 sp->pp_chg(sp, sp->pp_phase); 6423 SPPP_LOCK(sp, RW_WRITER); 6424 } 6425 6426 static void 6427 sppp_wq_work(struct work *wk, void *xsp) 6428 { 6429 struct sppp *sp; 6430 struct sppp_work *work; 6431 6432 sp = xsp; 6433 work = container_of(wk, struct sppp_work, work); 6434 atomic_cas_uint(&work->state, SPPP_WK_BUSY, SPPP_WK_FREE); 6435 6436 SPPP_LOCK(sp, RW_WRITER); 6437 work->func(sp, work->arg); 6438 SPPP_UNLOCK(sp); 6439 } 6440 6441 static struct workqueue * 6442 sppp_wq_create(struct sppp *sp, const char *xnamebuf, pri_t prio, int ipl, int flags) 6443 { 6444 struct workqueue *wq; 6445 int error; 6446 6447 error = workqueue_create(&wq, xnamebuf, sppp_wq_work, 6448 (void *)sp, prio, ipl, flags); 6449 if (error) { 6450 panic("%s: workqueue_create failed [%s, %d]\n", 6451 sp->pp_if.if_xname, xnamebuf, error); 6452 } 6453 6454 return wq; 6455 } 6456 6457 static void 6458 sppp_wq_destroy(struct sppp *sp __unused, struct workqueue *wq) 6459 { 6460 6461 workqueue_destroy(wq); 6462 } 6463 6464 static void 6465 sppp_wq_set(struct sppp_work *work, 6466 void (*func)(struct sppp *, void *), void *arg) 6467 { 6468 6469 work->func = func; 6470 work->arg = arg; 6471 } 6472 6473 static void 6474 sppp_wq_add(struct workqueue *wq, struct sppp_work *work) 6475 { 6476 6477 if (atomic_cas_uint(&work->state, SPPP_WK_FREE, SPPP_WK_BUSY) 6478 != SPPP_WK_FREE) 6479 return; 6480 6481 KASSERT(work->func != NULL); 6482 kpreempt_disable(); 6483 workqueue_enqueue(wq, &work->work, NULL); 6484 kpreempt_enable(); 6485 } 6486 static void 6487 sppp_wq_wait(struct workqueue *wq, struct sppp_work *work) 6488 { 6489 6490 atomic_swap_uint(&work->state, SPPP_WK_UNAVAIL); 6491 workqueue_wait(wq, &work->work); 6492 } 6493
Indexes created Fri Sep 26 08:10:20 GMT 2025