if_spppsubr.c revision 1.214
1 /* $NetBSD: if_spppsubr.c,v 1.214 2020/11/25 10:44:53 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 1.214 2020/11/25 10:44:53 yamaguchi Exp $"); 45 46 #if defined(_KERNEL_OPT) 47 #include "opt_inet.h" 48 #include "opt_modular.h" 49 #include "opt_compat_netbsd.h" 50 #include "opt_net_mpsafe.h" 51 #endif 52 53 #include <sys/param.h> 54 #include <sys/proc.h> 55 #include <sys/systm.h> 56 #include <sys/kernel.h> 57 #include <sys/sockio.h> 58 #include <sys/socket.h> 59 #include <sys/syslog.h> 60 #include <sys/malloc.h> 61 #include <sys/mbuf.h> 62 #include <sys/callout.h> 63 #include <sys/md5.h> 64 #include <sys/inttypes.h> 65 #include <sys/kauth.h> 66 #include <sys/cprng.h> 67 #include <sys/module.h> 68 #include <sys/workqueue.h> 69 #include <sys/atomic.h> 70 #include <sys/compat_stub.h> 71 #include <sys/cpu.h> 72 73 #include <net/if.h> 74 #include <net/netisr.h> 75 #include <net/if_types.h> 76 #include <net/route.h> 77 #include <net/ppp_defs.h> 78 79 #include <netinet/in.h> 80 #include <netinet/in_systm.h> 81 #include <netinet/in_var.h> 82 #ifdef INET 83 #include <netinet/ip.h> 84 #include <netinet/tcp.h> 85 #endif 86 #include <net/ethertypes.h> 87 88 #ifdef INET6 89 #include <netinet6/scope6_var.h> 90 #endif 91 92 #include <net/if_sppp.h> 93 #include <net/if_spppvar.h> 94 95 #ifdef NET_MPSAFE 96 #define SPPPSUBR_MPSAFE 1 97 #endif 98 99 #define LCP_KEEPALIVE_INTERVAL 10 /* seconds between checks */ 100 #define LOOPALIVECNT 3 /* loopback detection tries */ 101 #define DEFAULT_MAXALIVECNT 3 /* max. missed alive packets */ 102 #define DEFAULT_NORECV_TIME 15 /* before we get worried */ 103 #define DEFAULT_MAX_AUTH_FAILURES 5 /* max. auth. failures */ 104 105 /* 106 * Interface flags that can be set in an ifconfig command. 107 * 108 * Setting link0 will make the link passive, i.e. it will be marked 109 * as being administrative openable, but won't be opened to begin 110 * with. Incoming calls will be answered, or subsequent calls with 111 * -link1 will cause the administrative open of the LCP layer. 112 * 113 * Setting link1 will cause the link to auto-dial only as packets 114 * arrive to be sent. 115 * 116 * Setting IFF_DEBUG will syslog the option negotiation and state 117 * transitions at level kern.debug. Note: all logs consistently look 118 * like 119 * 120 * <if-name><unit>: <proto-name> <additional info...> 121 * 122 * with <if-name><unit> being something like "bppp0", and <proto-name> 123 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. 124 */ 125 126 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 127 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 128 129 #define CONF_REQ 1 /* PPP configure request */ 130 #define CONF_ACK 2 /* PPP configure acknowledge */ 131 #define CONF_NAK 3 /* PPP configure negative ack */ 132 #define CONF_REJ 4 /* PPP configure reject */ 133 #define TERM_REQ 5 /* PPP terminate request */ 134 #define TERM_ACK 6 /* PPP terminate acknowledge */ 135 #define CODE_REJ 7 /* PPP code reject */ 136 #define PROTO_REJ 8 /* PPP protocol reject */ 137 #define ECHO_REQ 9 /* PPP echo request */ 138 #define ECHO_REPLY 10 /* PPP echo reply */ 139 #define DISC_REQ 11 /* PPP discard request */ 140 141 #define LCP_OPT_MRU 1 /* maximum receive unit */ 142 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 143 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 144 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 145 #define LCP_OPT_MAGIC 5 /* magic number */ 146 #define LCP_OPT_RESERVED 6 /* reserved */ 147 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 148 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 149 #define LCP_OPT_FCS_ALTS 9 /* FCS alternatives */ 150 #define LCP_OPT_SELF_DESC_PAD 10 /* self-describing padding */ 151 #define LCP_OPT_CALL_BACK 13 /* callback */ 152 #define LCP_OPT_COMPOUND_FRMS 15 /* compound frames */ 153 #define LCP_OPT_MP_MRRU 17 /* multilink MRRU */ 154 #define LCP_OPT_MP_SSNHF 18 /* multilink short seq. numbers */ 155 #define LCP_OPT_MP_EID 19 /* multilink endpoint discriminator */ 156 157 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 158 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol */ 159 #define IPCP_OPT_ADDRESS 3 /* local IP address */ 160 #define IPCP_OPT_PRIMDNS 129 /* primary remote dns address */ 161 #define IPCP_OPT_SECDNS 131 /* secondary remote dns address */ 162 163 #define IPCP_UPDATE_LIMIT 8 /* limit of pending IP updating job */ 164 #define IPCP_SET_ADDRS 1 /* marker for IP address setting job */ 165 #define IPCP_CLEAR_ADDRS 2 /* marker for IP address clearing job */ 166 167 #define IPV6CP_OPT_IFID 1 /* interface identifier */ 168 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 169 170 #define PAP_REQ 1 /* PAP name/password request */ 171 #define PAP_ACK 2 /* PAP acknowledge */ 172 #define PAP_NAK 3 /* PAP fail */ 173 174 #define CHAP_CHALLENGE 1 /* CHAP challenge request */ 175 #define CHAP_RESPONSE 2 /* CHAP challenge response */ 176 #define CHAP_SUCCESS 3 /* CHAP response ok */ 177 #define CHAP_FAILURE 4 /* CHAP response failed */ 178 179 #define CHAP_MD5 5 /* hash algorithm - MD5 */ 180 181 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 182 #define CISCO_UNICAST 0x0f /* Cisco unicast address */ 183 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 184 #define CISCO_ADDR_REQ 0 /* Cisco address request */ 185 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 186 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 187 188 enum { 189 STATE_INITIAL = SPPP_STATE_INITIAL, 190 STATE_STARTING = SPPP_STATE_STARTING, 191 STATE_CLOSED = SPPP_STATE_CLOSED, 192 STATE_STOPPED = SPPP_STATE_STOPPED, 193 STATE_CLOSING = SPPP_STATE_CLOSING, 194 STATE_STOPPING = SPPP_STATE_STOPPING, 195 STATE_REQ_SENT = SPPP_STATE_REQ_SENT, 196 STATE_ACK_RCVD = SPPP_STATE_ACK_RCVD, 197 STATE_ACK_SENT = SPPP_STATE_ACK_SENT, 198 STATE_OPENED = SPPP_STATE_OPENED, 199 }; 200 201 enum cp_rcr_type { 202 CP_RCR_NONE = 0, /* initial value */ 203 CP_RCR_ACK, /* RCR+ */ 204 CP_RCR_NAK, /* RCR- */ 205 CP_RCR_REJ, /* RCR- */ 206 CP_RCR_DROP, /* DROP message */ 207 CP_RCR_ERR, /* internal error */ 208 }; 209 210 struct ppp_header { 211 uint8_t address; 212 uint8_t control; 213 uint16_t protocol; 214 } __packed; 215 #define PPP_HEADER_LEN sizeof (struct ppp_header) 216 217 struct lcp_header { 218 uint8_t type; 219 uint8_t ident; 220 uint16_t len; 221 } __packed; 222 #define LCP_HEADER_LEN sizeof (struct lcp_header) 223 224 struct cisco_packet { 225 uint32_t type; 226 uint32_t par1; 227 uint32_t par2; 228 uint16_t rel; 229 uint16_t time0; 230 uint16_t time1; 231 } __packed; 232 #define CISCO_PACKET_LEN 18 233 234 /* 235 * We follow the spelling and capitalization of RFC 1661 here, to make 236 * it easier comparing with the standard. Please refer to this RFC in 237 * case you can't make sense out of these abbreviation; it will also 238 * explain the semantics related to the various events and actions. 239 */ 240 struct cp { 241 u_short proto; /* PPP control protocol number */ 242 u_char protoidx; /* index into state table in struct sppp */ 243 u_char flags; 244 #define CP_LCP 0x01 /* this is the LCP */ 245 #define CP_AUTH 0x02 /* this is an authentication protocol */ 246 #define CP_NCP 0x04 /* this is a NCP */ 247 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 248 const char *name; /* name of this control protocol */ 249 /* event handlers */ 250 void (*Up)(struct sppp *, void *); 251 void (*Down)(struct sppp *, void *); 252 void (*Open)(struct sppp *, void *); 253 void (*Close)(struct sppp *, void *); 254 void (*TO)(struct sppp *, void *); 255 /* actions */ 256 void (*tlu)(struct sppp *); 257 void (*tld)(struct sppp *); 258 void (*tls)(const struct cp *, struct sppp *); 259 void (*tlf)(const struct cp *, struct sppp *); 260 void (*scr)(struct sppp *); 261 void (*scan)(const struct cp *, struct sppp *); 262 263 /* message parser */ 264 enum cp_rcr_type 265 (*parse_confreq)(struct sppp *, struct lcp_header *, int, 266 uint8_t **, size_t *, size_t *); 267 void (*parse_confrej)(struct sppp *, struct lcp_header *, int); 268 void (*parse_confnak)(struct sppp *, struct lcp_header *, int); 269 }; 270 271 enum auth_role { 272 SPPP_AUTH_NOROLE = 0, 273 SPPP_AUTH_SERV = __BIT(0), 274 SPPP_AUTH_PEER = __BIT(1), 275 }; 276 277 static struct sppp *spppq; 278 static kmutex_t *spppq_lock = NULL; 279 static callout_t keepalive_ch; 280 281 #define SPPPQ_LOCK() if (spppq_lock) \ 282 mutex_enter(spppq_lock); 283 #define SPPPQ_UNLOCK() if (spppq_lock) \ 284 mutex_exit(spppq_lock); 285 286 #define SPPP_LOCK(_sp, _op) rw_enter(&(_sp)->pp_lock, (_op)) 287 #define SPPP_UNLOCK(_sp) rw_exit(&(_sp)->pp_lock) 288 #define SPPP_WLOCKED(_sp) rw_write_held(&(_sp)->pp_lock) 289 #define SPPP_UPGRADE(_sp) do{ \ 290 SPPP_UNLOCK(_sp); \ 291 SPPP_LOCK(_sp, RW_WRITER); \ 292 }while (0) 293 #define SPPP_DOWNGRADE(_sp) rw_downgrade(&(_sp)->pp_lock) 294 #define SPPP_WQ_SET(_wk, _func, _arg) \ 295 sppp_wq_set((_wk), (_func), __UNCONST((_arg))) 296 297 #ifdef INET 298 #ifndef SPPPSUBR_MPSAFE 299 /* 300 * The following disgusting hack gets around the problem that IP TOS 301 * can't be set yet. We want to put "interactive" traffic on a high 302 * priority queue. To decide if traffic is interactive, we check that 303 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 304 * 305 * XXX is this really still necessary? - joerg - 306 */ 307 static u_short interactive_ports[8] = { 308 0, 513, 0, 0, 309 0, 21, 0, 23, 310 }; 311 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 312 #endif /* SPPPSUBR_MPSAFE */ 313 #endif 314 315 /* almost every function needs these */ 316 #define STDDCL \ 317 struct ifnet *ifp = &sp->pp_if; \ 318 int debug = ifp->if_flags & IFF_DEBUG 319 320 static int sppp_output(struct ifnet *, struct mbuf *, 321 const struct sockaddr *, const struct rtentry *); 322 323 static void sppp_cisco_send(struct sppp *, int, int32_t, int32_t); 324 static void sppp_cisco_input(struct sppp *, struct mbuf *); 325 326 static void sppp_cp_init(const struct cp *, struct sppp *); 327 static void sppp_cp_fini(const struct cp *, struct sppp *); 328 static void sppp_cp_input(const struct cp *, struct sppp *, 329 struct mbuf *); 330 static void sppp_cp_input(const struct cp *, struct sppp *, 331 struct mbuf *); 332 static void sppp_cp_send(struct sppp *, u_short, u_char, 333 u_char, u_short, void *); 334 /* static void sppp_cp_timeout(void *arg); */ 335 static void sppp_cp_change_state(const struct cp *, struct sppp *, int); 336 static struct workqueue * 337 sppp_wq_create(struct sppp *, const char *, pri_t, int, int); 338 static void sppp_wq_destroy(struct sppp *, struct workqueue *); 339 static void sppp_wq_set(struct sppp_work *, 340 void (*)(struct sppp *, void *), void *); 341 static void sppp_wq_add(struct workqueue *, struct sppp_work *); 342 static void sppp_wq_wait(struct workqueue *, struct sppp_work *); 343 static void sppp_cp_to_lcp(void *); 344 static void sppp_cp_to_ipcp(void *); 345 static void sppp_cp_to_ipv6cp(void *); 346 static void sppp_auth_send(const struct cp *, struct sppp *, 347 unsigned int, unsigned int, ...); 348 static int sppp_auth_role(const struct cp *, struct sppp *); 349 static void sppp_auth_to_event(struct sppp *, void *); 350 static void sppp_auth_sca_scn(const struct cp *, struct sppp *); 351 352 static void sppp_up_event(struct sppp *, void *); 353 static void sppp_down_event(struct sppp *, void *); 354 static void sppp_open_event(struct sppp *, void *); 355 static void sppp_close_event(struct sppp *, void *); 356 static void sppp_to_event(struct sppp *, void *); 357 static void sppp_rcr_event(struct sppp *, void *); 358 static void sppp_rca_event(struct sppp *, void *); 359 static void sppp_rcn_event(struct sppp *, void *); 360 static void sppp_rtr_event(struct sppp *, void *); 361 static void sppp_rta_event(struct sppp *, void *); 362 static void sppp_rxj_event(struct sppp *, void *); 363 364 static void sppp_null(struct sppp *); 365 static void sppp_tls(const struct cp *, struct sppp *); 366 static void sppp_tlf(const struct cp *, struct sppp *); 367 static void sppp_sca_scn(const struct cp *, struct sppp *); 368 static void sppp_ifdown(struct sppp *, void *); 369 370 static void sppp_lcp_init(struct sppp *); 371 static void sppp_lcp_up(struct sppp *, void *); 372 static void sppp_lcp_down(struct sppp *, void *); 373 static void sppp_lcp_open(struct sppp *, void *); 374 static enum cp_rcr_type 375 sppp_lcp_confreq(struct sppp *, struct lcp_header *, int, 376 uint8_t **, size_t *, size_t *); 377 static void sppp_lcp_confrej(struct sppp *, struct lcp_header *, int); 378 static void sppp_lcp_confnak(struct sppp *, struct lcp_header *, int); 379 static void sppp_lcp_tlu(struct sppp *); 380 static void sppp_lcp_tld(struct sppp *); 381 static void sppp_lcp_tls(const struct cp *, struct sppp *); 382 static void sppp_lcp_tlf(const struct cp *, struct sppp *); 383 static void sppp_lcp_scr(struct sppp *); 384 static void sppp_lcp_check_and_close(struct sppp *); 385 static int sppp_cp_check(struct sppp *, u_char); 386 387 static void sppp_ipcp_init(struct sppp *); 388 static void sppp_ipcp_open(struct sppp *, void *); 389 static void sppp_ipcp_close(struct sppp *, void *); 390 static enum cp_rcr_type 391 sppp_ipcp_confreq(struct sppp *, struct lcp_header *, int, 392 uint8_t **, size_t *, size_t *); 393 static void sppp_ipcp_confrej(struct sppp *, struct lcp_header *, int); 394 static void sppp_ipcp_confnak(struct sppp *, struct lcp_header *, int); 395 static void sppp_ipcp_tlu(struct sppp *); 396 static void sppp_ipcp_scr(struct sppp *); 397 398 static void sppp_ipv6cp_init(struct sppp *); 399 static void sppp_ipv6cp_open(struct sppp *, void *); 400 static enum cp_rcr_type 401 sppp_ipv6cp_confreq(struct sppp *, struct lcp_header *, int, 402 uint8_t **, size_t *, size_t *); 403 static void sppp_ipv6cp_confrej(struct sppp *, struct lcp_header *, int); 404 static void sppp_ipv6cp_confnak(struct sppp *, struct lcp_header *, int); 405 static void sppp_ipv6cp_tlu(struct sppp *); 406 static void sppp_ipv6cp_scr(struct sppp *); 407 408 static void sppp_pap_input(struct sppp *, struct mbuf *); 409 static void sppp_pap_init(struct sppp *); 410 static void sppp_pap_tlu(struct sppp *); 411 static void sppp_pap_scr(struct sppp *); 412 static void sppp_pap_scr(struct sppp *); 413 414 static void sppp_chap_input(struct sppp *, struct mbuf *); 415 static void sppp_chap_init(struct sppp *); 416 static void sppp_chap_open(struct sppp *, void *); 417 static void sppp_chap_tlu(struct sppp *); 418 static void sppp_chap_scr(struct sppp *); 419 static void sppp_chap_rcv_challenge_event(struct sppp *, void *); 420 421 static const char *sppp_auth_type_name(u_short, u_char); 422 static const char *sppp_cp_type_name(u_char); 423 static const char *sppp_dotted_quad(uint32_t); 424 static const char *sppp_ipcp_opt_name(u_char); 425 #ifdef INET6 426 static const char *sppp_ipv6cp_opt_name(u_char); 427 #endif 428 static const char *sppp_lcp_opt_name(u_char); 429 static const char *sppp_phase_name(int); 430 static const char *sppp_proto_name(u_short); 431 static const char *sppp_state_name(int); 432 static int sppp_params(struct sppp *, u_long, void *); 433 #ifdef INET 434 static void sppp_get_ip_addrs(struct sppp *, uint32_t *, uint32_t *, uint32_t *); 435 static void sppp_set_ip_addrs(struct sppp *); 436 static void sppp_clear_ip_addrs(struct sppp *); 437 #endif 438 static void sppp_keepalive(void *); 439 static void sppp_phase_network(struct sppp *); 440 static void sppp_print_bytes(const u_char *, u_short); 441 static void sppp_print_string(const char *, u_short); 442 #ifdef INET6 443 static void sppp_get_ip6_addrs(struct sppp *, struct in6_addr *, 444 struct in6_addr *, struct in6_addr *); 445 #ifdef IPV6CP_MYIFID_DYN 446 static void sppp_set_ip6_addr(struct sppp *, const struct in6_addr *); 447 static void sppp_gen_ip6_addr(struct sppp *, const struct in6_addr *); 448 #endif 449 static void sppp_suggest_ip6_addr(struct sppp *, struct in6_addr *); 450 #endif 451 452 static void sppp_notify_up(struct sppp *); 453 static void sppp_notify_down(struct sppp *); 454 static void sppp_notify_tls_wlocked(struct sppp *); 455 static void sppp_notify_tlf_wlocked(struct sppp *); 456 #ifdef INET6 457 static void sppp_notify_con_wlocked(struct sppp *); 458 #endif 459 static void sppp_notify_con(struct sppp *); 460 461 static void sppp_notify_chg_wlocked(struct sppp *); 462 463 /* our control protocol descriptors */ 464 static const struct cp lcp = { 465 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 466 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, 467 sppp_close_event, sppp_to_event, 468 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, 469 sppp_lcp_tlf, sppp_lcp_scr, sppp_sca_scn, 470 sppp_lcp_confreq, sppp_lcp_confrej, sppp_lcp_confnak 471 }; 472 473 static const struct cp ipcp = { 474 PPP_IPCP, IDX_IPCP, 475 #ifdef INET 476 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 477 #else 478 0, 479 #endif 480 "ipcp", 481 sppp_up_event, sppp_down_event, sppp_ipcp_open, 482 sppp_ipcp_close, sppp_to_event, 483 sppp_ipcp_tlu, sppp_null, sppp_tls, 484 sppp_tlf, sppp_ipcp_scr, sppp_sca_scn, 485 sppp_ipcp_confreq, sppp_ipcp_confrej, sppp_ipcp_confnak, 486 }; 487 488 static const struct cp ipv6cp = { 489 PPP_IPV6CP, IDX_IPV6CP, 490 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 491 CP_NCP, 492 #else 493 0, 494 #endif 495 "ipv6cp", 496 sppp_up_event, sppp_down_event, sppp_ipv6cp_open, 497 sppp_close_event, sppp_to_event, 498 sppp_ipv6cp_tlu, sppp_null, sppp_tls, 499 sppp_tlf, sppp_ipv6cp_scr, sppp_sca_scn, 500 sppp_ipv6cp_confreq, sppp_ipv6cp_confrej, sppp_ipv6cp_confnak, 501 }; 502 503 static const struct cp pap = { 504 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 505 sppp_up_event, sppp_down_event, sppp_open_event, 506 sppp_close_event, sppp_to_event, 507 sppp_pap_tlu, sppp_null, sppp_tls, sppp_tlf, 508 sppp_pap_scr, sppp_auth_sca_scn, 509 NULL, NULL, NULL 510 }; 511 512 static const struct cp chap = { 513 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 514 sppp_up_event, sppp_down_event, sppp_chap_open, 515 sppp_close_event, sppp_auth_to_event, 516 sppp_chap_tlu, sppp_null, sppp_tls, sppp_tlf, 517 sppp_chap_scr, sppp_auth_sca_scn, 518 NULL, NULL, NULL 519 }; 520 521 static const struct cp *cps[IDX_COUNT] = { 522 &lcp, /* IDX_LCP */ 523 &ipcp, /* IDX_IPCP */ 524 &ipv6cp, /* IDX_IPV6CP */ 525 &pap, /* IDX_PAP */ 526 &chap, /* IDX_CHAP */ 527 }; 528 529 static void 530 sppp_change_phase(struct sppp *sp, int phase) 531 { 532 STDDCL; 533 534 KASSERT(SPPP_WLOCKED(sp)); 535 536 if (sp->pp_phase == phase) 537 return; 538 539 sp->pp_phase = phase; 540 541 if (phase == SPPP_PHASE_NETWORK) 542 if_link_state_change(ifp, LINK_STATE_UP); 543 else 544 if_link_state_change(ifp, LINK_STATE_DOWN); 545 546 if (debug) 547 { 548 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 549 sppp_phase_name(sp->pp_phase)); 550 } 551 } 552 553 /* 554 * Exported functions, comprising our interface to the lower layer. 555 */ 556 557 /* 558 * Process the received packet. 559 */ 560 void 561 sppp_input(struct ifnet *ifp, struct mbuf *m) 562 { 563 struct ppp_header *h = NULL; 564 pktqueue_t *pktq = NULL; 565 struct ifqueue *inq = NULL; 566 uint16_t protocol; 567 struct sppp *sp = (struct sppp *)ifp; 568 int debug = ifp->if_flags & IFF_DEBUG; 569 int isr = 0; 570 571 SPPP_LOCK(sp, RW_READER); 572 573 if (ifp->if_flags & IFF_UP) { 574 /* Count received bytes, add hardware framing */ 575 if_statadd(ifp, if_ibytes, m->m_pkthdr.len + sp->pp_framebytes); 576 /* Note time of last receive */ 577 sp->pp_last_receive = time_uptime; 578 } 579 580 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 581 /* Too small packet, drop it. */ 582 if (debug) 583 log(LOG_DEBUG, 584 "%s: input packet is too small, %d bytes\n", 585 ifp->if_xname, m->m_pkthdr.len); 586 drop: 587 if_statadd2(ifp, if_ierrors, 1, if_iqdrops, 1); 588 m_freem(m); 589 SPPP_UNLOCK(sp); 590 return; 591 } 592 593 if (sp->pp_flags & PP_NOFRAMING) { 594 memcpy(&protocol, mtod(m, void *), 2); 595 protocol = ntohs(protocol); 596 m_adj(m, 2); 597 } else { 598 599 /* Get PPP header. */ 600 h = mtod(m, struct ppp_header *); 601 m_adj(m, PPP_HEADER_LEN); 602 603 switch (h->address) { 604 case PPP_ALLSTATIONS: 605 if (h->control != PPP_UI) 606 goto invalid; 607 if (sp->pp_flags & PP_CISCO) { 608 if (debug) 609 log(LOG_DEBUG, 610 "%s: PPP packet in Cisco mode " 611 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 612 ifp->if_xname, 613 h->address, h->control, ntohs(h->protocol)); 614 goto drop; 615 } 616 break; 617 case CISCO_MULTICAST: 618 case CISCO_UNICAST: 619 /* Don't check the control field here (RFC 1547). */ 620 if (! (sp->pp_flags & PP_CISCO)) { 621 if (debug) 622 log(LOG_DEBUG, 623 "%s: Cisco packet in PPP mode " 624 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 625 ifp->if_xname, 626 h->address, h->control, ntohs(h->protocol)); 627 goto drop; 628 } 629 switch (ntohs(h->protocol)) { 630 default: 631 if_statinc(ifp, if_noproto); 632 goto invalid; 633 case CISCO_KEEPALIVE: 634 SPPP_UNLOCK(sp); 635 sppp_cisco_input((struct sppp *) ifp, m); 636 m_freem(m); 637 return; 638 #ifdef INET 639 case ETHERTYPE_IP: 640 pktq = ip_pktq; 641 break; 642 #endif 643 #ifdef INET6 644 case ETHERTYPE_IPV6: 645 pktq = ip6_pktq; 646 break; 647 #endif 648 } 649 goto queue_pkt; 650 default: /* Invalid PPP packet. */ 651 invalid: 652 if (debug) 653 log(LOG_DEBUG, 654 "%s: invalid input packet " 655 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 656 ifp->if_xname, 657 h->address, h->control, ntohs(h->protocol)); 658 goto drop; 659 } 660 protocol = ntohs(h->protocol); 661 } 662 663 switch (protocol) { 664 default: 665 if (sp->scp[IDX_LCP].state == STATE_OPENED) { 666 uint16_t prot = htons(protocol); 667 668 SPPP_UPGRADE(sp); 669 sppp_cp_send(sp, PPP_LCP, PROTO_REJ, 670 ++sp->scp[IDX_LCP].seq, m->m_pkthdr.len + 2, 671 &prot); 672 SPPP_DOWNGRADE(sp); 673 } 674 if (debug) 675 log(LOG_DEBUG, 676 "%s: invalid input protocol " 677 "<proto=0x%x>\n", ifp->if_xname, ntohs(protocol)); 678 if_statinc(ifp, if_noproto); 679 goto drop; 680 case PPP_LCP: 681 SPPP_UNLOCK(sp); 682 sppp_cp_input(&lcp, sp, m); 683 m_freem(m); 684 return; 685 case PPP_PAP: 686 SPPP_UNLOCK(sp); 687 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 688 sppp_pap_input(sp, m); 689 } 690 m_freem(m); 691 return; 692 case PPP_CHAP: 693 SPPP_UNLOCK(sp); 694 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 695 sppp_chap_input(sp, m); 696 } 697 m_freem(m); 698 return; 699 #ifdef INET 700 case PPP_IPCP: 701 SPPP_UNLOCK(sp); 702 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 703 sppp_cp_input(&ipcp, sp, m); 704 } 705 m_freem(m); 706 return; 707 case PPP_IP: 708 if (sp->scp[IDX_IPCP].state == STATE_OPENED) { 709 sp->pp_last_activity = time_uptime; 710 pktq = ip_pktq; 711 } 712 break; 713 #endif 714 #ifdef INET6 715 case PPP_IPV6CP: 716 SPPP_UNLOCK(sp); 717 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 718 sppp_cp_input(&ipv6cp, sp, m); 719 } 720 m_freem(m); 721 return; 722 723 case PPP_IPV6: 724 if (sp->scp[IDX_IPV6CP].state == STATE_OPENED) { 725 sp->pp_last_activity = time_uptime; 726 pktq = ip6_pktq; 727 } 728 break; 729 #endif 730 } 731 732 queue_pkt: 733 if ((ifp->if_flags & IFF_UP) == 0 || (!inq && !pktq)) { 734 goto drop; 735 } 736 737 /* Check queue. */ 738 if (__predict_true(pktq)) { 739 if (__predict_false(!pktq_enqueue(pktq, m, 0))) { 740 goto drop; 741 } 742 SPPP_UNLOCK(sp); 743 return; 744 } 745 746 SPPP_UNLOCK(sp); 747 748 IFQ_LOCK(inq); 749 if (IF_QFULL(inq)) { 750 /* Queue overflow. */ 751 IF_DROP(inq); 752 IFQ_UNLOCK(inq); 753 if (debug) 754 log(LOG_DEBUG, "%s: protocol queue overflow\n", 755 ifp->if_xname); 756 757 SPPP_LOCK(sp, RW_READER); 758 goto drop; 759 } 760 IF_ENQUEUE(inq, m); 761 IFQ_UNLOCK(inq); 762 schednetisr(isr); 763 } 764 765 /* 766 * Enqueue transmit packet. 767 */ 768 static int 769 sppp_output(struct ifnet *ifp, struct mbuf *m, 770 const struct sockaddr *dst, const struct rtentry *rt) 771 { 772 struct sppp *sp = (struct sppp *) ifp; 773 struct ppp_header *h = NULL; 774 #ifndef SPPPSUBR_MPSAFE 775 struct ifqueue *ifq = NULL; /* XXX */ 776 #endif 777 int s, error = 0; 778 uint16_t protocol; 779 size_t pktlen; 780 781 s = splnet(); 782 SPPP_LOCK(sp, RW_READER); 783 784 sp->pp_last_activity = time_uptime; 785 786 if ((ifp->if_flags & IFF_UP) == 0 || 787 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 788 SPPP_UNLOCK(sp); 789 splx(s); 790 791 m_freem(m); 792 793 return (ENETDOWN); 794 } 795 796 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 797 /* 798 * Interface is not yet running, but auto-dial. Need 799 * to start LCP for it. 800 */ 801 ifp->if_flags |= IFF_RUNNING; 802 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 803 } 804 805 /* 806 * If the queueing discipline needs packet classification, 807 * do it before prepending link headers. 808 */ 809 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family); 810 811 #ifdef INET 812 if (dst->sa_family == AF_INET) { 813 struct ip *ip = NULL; 814 #ifndef SPPPSUBR_MPSAFE 815 struct tcphdr *th = NULL; 816 #endif 817 818 if (m->m_len >= sizeof(struct ip)) { 819 ip = mtod(m, struct ip *); 820 #ifndef SPPPSUBR_MPSAFE 821 if (ip->ip_p == IPPROTO_TCP && 822 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + 823 sizeof(struct tcphdr)) { 824 th = (struct tcphdr *) 825 ((char *)ip + (ip->ip_hl << 2)); 826 } 827 #endif 828 } else 829 ip = NULL; 830 831 /* 832 * When using dynamic local IP address assignment by using 833 * 0.0.0.0 as a local address, the first TCP session will 834 * not connect because the local TCP checksum is computed 835 * using 0.0.0.0 which will later become our real IP address 836 * so the TCP checksum computed at the remote end will 837 * become invalid. So we 838 * - don't let packets with src ip addr 0 thru 839 * - we flag TCP packets with src ip 0 as an error 840 */ 841 if (ip && ip->ip_src.s_addr == INADDR_ANY) { 842 uint8_t proto = ip->ip_p; 843 844 SPPP_UNLOCK(sp); 845 splx(s); 846 847 m_freem(m); 848 if (proto == IPPROTO_TCP) 849 return (EADDRNOTAVAIL); 850 else 851 return (0); 852 } 853 854 #ifndef SPPPSUBR_MPSAFE 855 /* 856 * Put low delay, telnet, rlogin and ftp control packets 857 * in front of the queue. 858 */ 859 if (!IF_QFULL(&sp->pp_fastq) && 860 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 861 (th && (INTERACTIVE(ntohs(th->th_sport)) || 862 INTERACTIVE(ntohs(th->th_dport)))))) 863 ifq = &sp->pp_fastq; 864 #endif /* !SPPPSUBR_MPSAFE */ 865 } 866 #endif 867 868 #ifdef INET6 869 if (dst->sa_family == AF_INET6) { 870 /* XXX do something tricky here? */ 871 } 872 #endif 873 874 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 875 /* 876 * Prepend general data packet PPP header. For now, IP only. 877 */ 878 M_PREPEND(m, PPP_HEADER_LEN, M_DONTWAIT); 879 if (! m) { 880 if (ifp->if_flags & IFF_DEBUG) 881 log(LOG_DEBUG, "%s: no memory for transmit header\n", 882 ifp->if_xname); 883 if_statinc(ifp, if_oerrors); 884 SPPP_UNLOCK(sp); 885 splx(s); 886 return (ENOBUFS); 887 } 888 /* 889 * May want to check size of packet 890 * (albeit due to the implementation it's always enough) 891 */ 892 h = mtod(m, struct ppp_header *); 893 if (sp->pp_flags & PP_CISCO) { 894 h->address = CISCO_UNICAST; /* unicast address */ 895 h->control = 0; 896 } else { 897 h->address = PPP_ALLSTATIONS; /* broadcast address */ 898 h->control = PPP_UI; /* Unnumbered Info */ 899 } 900 } 901 902 switch (dst->sa_family) { 903 #ifdef INET 904 case AF_INET: /* Internet Protocol */ 905 if (sp->pp_flags & PP_CISCO) 906 protocol = htons(ETHERTYPE_IP); 907 else { 908 /* 909 * Don't choke with an ENETDOWN early. It's 910 * possible that we just started dialing out, 911 * so don't drop the packet immediately. If 912 * we notice that we run out of buffer space 913 * below, we will however remember that we are 914 * not ready to carry IP packets, and return 915 * ENETDOWN, as opposed to ENOBUFS. 916 */ 917 protocol = htons(PPP_IP); 918 if (sp->scp[IDX_IPCP].state != STATE_OPENED) 919 error = ENETDOWN; 920 } 921 break; 922 #endif 923 #ifdef INET6 924 case AF_INET6: /* Internet Protocol version 6 */ 925 if (sp->pp_flags & PP_CISCO) 926 protocol = htons(ETHERTYPE_IPV6); 927 else { 928 /* 929 * Don't choke with an ENETDOWN early. It's 930 * possible that we just started dialing out, 931 * so don't drop the packet immediately. If 932 * we notice that we run out of buffer space 933 * below, we will however remember that we are 934 * not ready to carry IP packets, and return 935 * ENETDOWN, as opposed to ENOBUFS. 936 */ 937 protocol = htons(PPP_IPV6); 938 if (sp->scp[IDX_IPV6CP].state != STATE_OPENED) 939 error = ENETDOWN; 940 } 941 break; 942 #endif 943 default: 944 m_freem(m); 945 if_statinc(ifp, if_oerrors); 946 SPPP_UNLOCK(sp); 947 splx(s); 948 return (EAFNOSUPPORT); 949 } 950 951 if (sp->pp_flags & PP_NOFRAMING) { 952 M_PREPEND(m, 2, M_DONTWAIT); 953 if (m == NULL) { 954 if (ifp->if_flags & IFF_DEBUG) 955 log(LOG_DEBUG, "%s: no memory for transmit header\n", 956 ifp->if_xname); 957 if_statinc(ifp, if_oerrors); 958 SPPP_UNLOCK(sp); 959 splx(s); 960 return (ENOBUFS); 961 } 962 *mtod(m, uint16_t *) = protocol; 963 } else { 964 h->protocol = protocol; 965 } 966 967 pktlen = m->m_pkthdr.len; 968 #ifdef SPPPSUBR_MPSAFE 969 SPPP_UNLOCK(sp); 970 error = if_transmit_lock(ifp, m); 971 SPPP_LOCK(sp, RW_READER); 972 if (error == 0) 973 if_statadd(ifp, if_obytes, pktlen + sp->pp_framebytes); 974 #else /* !SPPPSUBR_MPSAFE */ 975 error = ifq_enqueue2(ifp, ifq, m); 976 977 if (error == 0) { 978 /* 979 * Count output packets and bytes. 980 * The packet length includes header + additional hardware 981 * framing according to RFC 1333. 982 */ 983 if (!(ifp->if_flags & IFF_OACTIVE)) { 984 SPPP_UNLOCK(sp); 985 if_start_lock(ifp); 986 SPPP_LOCK(sp, RW_READER); 987 } 988 if_statadd(ifp, if_obytes, pktlen + sp->pp_framebytes); 989 } 990 #endif /* !SPPPSUBR_MPSAFE */ 991 SPPP_UNLOCK(sp); 992 splx(s); 993 return error; 994 } 995 996 void 997 sppp_attach(struct ifnet *ifp) 998 { 999 struct sppp *sp = (struct sppp *) ifp; 1000 char xnamebuf[MAXCOMLEN]; 1001 1002 /* Initialize keepalive handler. */ 1003 if (! spppq) { 1004 callout_init(&keepalive_ch, CALLOUT_MPSAFE); 1005 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 1006 } 1007 1008 if (! spppq_lock) 1009 spppq_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_SOFTNET); 1010 1011 sp->pp_if.if_type = IFT_PPP; 1012 sp->pp_if.if_output = sppp_output; 1013 sp->pp_fastq.ifq_maxlen = 32; 1014 sp->pp_cpq.ifq_maxlen = 20; 1015 sp->pp_loopcnt = 0; 1016 sp->pp_alivecnt = 0; 1017 sp->pp_last_activity = 0; 1018 sp->pp_last_receive = 0; 1019 sp->pp_maxalive = DEFAULT_MAXALIVECNT; 1020 sp->pp_max_noreceive = DEFAULT_NORECV_TIME; 1021 sp->pp_idle_timeout = 0; 1022 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 1023 sp->pp_phase = SPPP_PHASE_DEAD; 1024 sp->pp_up = sppp_notify_up; 1025 sp->pp_down = sppp_notify_down; 1026 sppp_wq_set(&sp->work_ifdown, sppp_ifdown, NULL); 1027 memset(sp->scp, 0, sizeof(sp->scp)); 1028 rw_init(&sp->pp_lock); 1029 1030 if_alloc_sadl(ifp); 1031 1032 /* Lets not beat about the bush, we know we're down. */ 1033 ifp->if_link_state = LINK_STATE_DOWN; 1034 1035 snprintf(xnamebuf, sizeof(xnamebuf), "%s.wq_cp", ifp->if_xname); 1036 sp->wq_cp = sppp_wq_create(sp, xnamebuf, 1037 PRI_SOFTNET, IPL_SOFTNET, WQ_MPSAFE); 1038 1039 memset(&sp->myauth, 0, sizeof sp->myauth); 1040 memset(&sp->hisauth, 0, sizeof sp->hisauth); 1041 SPPP_LOCK(sp, RW_WRITER); 1042 sppp_lcp_init(sp); 1043 sppp_ipcp_init(sp); 1044 sppp_ipv6cp_init(sp); 1045 sppp_pap_init(sp); 1046 sppp_chap_init(sp); 1047 SPPP_UNLOCK(sp); 1048 1049 SPPPQ_LOCK(); 1050 /* Insert new entry into the keepalive list. */ 1051 sp->pp_next = spppq; 1052 spppq = sp; 1053 SPPPQ_UNLOCK(); 1054 } 1055 1056 void 1057 sppp_detach(struct ifnet *ifp) 1058 { 1059 struct sppp **q, *p, *sp = (struct sppp *) ifp; 1060 1061 /* Remove the entry from the keepalive list. */ 1062 SPPPQ_LOCK(); 1063 for (q = &spppq; (p = *q); q = &p->pp_next) 1064 if (p == sp) { 1065 *q = p->pp_next; 1066 break; 1067 } 1068 SPPPQ_UNLOCK(); 1069 1070 if (! spppq) { 1071 /* Stop keepalive handler. */ 1072 callout_stop(&keepalive_ch); 1073 mutex_obj_free(spppq_lock); 1074 spppq_lock = NULL; 1075 } 1076 1077 SPPP_LOCK(sp, RW_WRITER); 1078 1079 sppp_cp_fini(&lcp, sp); 1080 sppp_cp_fini(&ipcp, sp); 1081 sppp_cp_fini(&pap, sp); 1082 sppp_cp_fini(&chap, sp); 1083 #ifdef INET6 1084 sppp_cp_fini(&ipv6cp, sp); 1085 #endif 1086 sppp_wq_destroy(sp, sp->wq_cp); 1087 1088 /* free authentication info */ 1089 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 1090 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 1091 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 1092 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 1093 SPPP_UNLOCK(sp); 1094 rw_destroy(&sp->pp_lock); 1095 } 1096 1097 /* 1098 * Flush the interface output queue. 1099 */ 1100 void 1101 sppp_flush(struct ifnet *ifp) 1102 { 1103 struct sppp *sp = (struct sppp *) ifp; 1104 1105 SPPP_LOCK(sp, RW_WRITER); 1106 IFQ_PURGE(&sp->pp_if.if_snd); 1107 IF_PURGE(&sp->pp_fastq); 1108 IF_PURGE(&sp->pp_cpq); 1109 SPPP_UNLOCK(sp); 1110 } 1111 1112 /* 1113 * Check if the output queue is empty. 1114 */ 1115 int 1116 sppp_isempty(struct ifnet *ifp) 1117 { 1118 struct sppp *sp = (struct sppp *) ifp; 1119 int empty, s; 1120 1121 s = splnet(); 1122 SPPP_LOCK(sp, RW_READER); 1123 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1124 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1125 SPPP_UNLOCK(sp); 1126 splx(s); 1127 return (empty); 1128 } 1129 1130 /* 1131 * Get next packet to send. 1132 */ 1133 struct mbuf * 1134 sppp_dequeue(struct ifnet *ifp) 1135 { 1136 struct sppp *sp = (struct sppp *) ifp; 1137 struct mbuf *m; 1138 int s; 1139 1140 s = splnet(); 1141 SPPP_LOCK(sp, RW_WRITER); 1142 /* 1143 * Process only the control protocol queue until we have at 1144 * least one NCP open. 1145 * 1146 * Do always serve all three queues in Cisco mode. 1147 */ 1148 IF_DEQUEUE(&sp->pp_cpq, m); 1149 if (m == NULL && 1150 (sppp_cp_check(sp, CP_NCP) || (sp->pp_flags & PP_CISCO) != 0)) { 1151 IF_DEQUEUE(&sp->pp_fastq, m); 1152 if (m == NULL) 1153 IFQ_DEQUEUE(&sp->pp_if.if_snd, m); 1154 } 1155 SPPP_UNLOCK(sp); 1156 splx(s); 1157 return m; 1158 } 1159 1160 /* 1161 * Process an ioctl request. Called on low priority level. 1162 */ 1163 int 1164 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1165 { 1166 struct lwp *l = curlwp; /* XXX */ 1167 struct ifreq *ifr = (struct ifreq *) data; 1168 struct ifaddr *ifa = (struct ifaddr *) data; 1169 struct sppp *sp = (struct sppp *) ifp; 1170 int s, error=0, going_up, going_down; 1171 u_short newmode; 1172 1173 s = splnet(); 1174 switch (cmd) { 1175 case SIOCINITIFADDR: 1176 ifa->ifa_rtrequest = p2p_rtrequest; 1177 break; 1178 1179 case SIOCSIFFLAGS: 1180 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1181 break; 1182 1183 SPPP_LOCK(sp, RW_WRITER); 1184 going_up = ifp->if_flags & IFF_UP && 1185 (ifp->if_flags & IFF_RUNNING) == 0; 1186 going_down = (ifp->if_flags & IFF_UP) == 0 && 1187 ifp->if_flags & IFF_RUNNING; 1188 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1189 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1190 /* sanity */ 1191 newmode = IFF_PASSIVE; 1192 ifp->if_flags &= ~IFF_AUTO; 1193 } 1194 1195 if (going_up || going_down) { 1196 sp->lcp.reestablish = false; 1197 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 1198 } 1199 if (going_up && newmode == 0) { 1200 /* neither auto-dial nor passive */ 1201 ifp->if_flags |= IFF_RUNNING; 1202 if (!(sp->pp_flags & PP_CISCO)) { 1203 sppp_wq_add(sp->wq_cp, 1204 &sp->scp[IDX_LCP].work_open); 1205 } 1206 } else if (going_down) { 1207 SPPP_UNLOCK(sp); 1208 sppp_flush(ifp); 1209 SPPP_LOCK(sp, RW_WRITER); 1210 1211 ifp->if_flags &= ~IFF_RUNNING; 1212 } 1213 SPPP_UNLOCK(sp); 1214 break; 1215 1216 case SIOCSIFMTU: 1217 if (ifr->ifr_mtu < PPP_MINMRU || 1218 ifr->ifr_mtu > sp->lcp.their_mru) { 1219 error = EINVAL; 1220 break; 1221 } 1222 /*FALLTHROUGH*/ 1223 case SIOCGIFMTU: 1224 if ((error = ifioctl_common(ifp, cmd, data)) == ENETRESET) 1225 error = 0; 1226 break; 1227 case SIOCADDMULTI: 1228 case SIOCDELMULTI: 1229 break; 1230 1231 case SPPPSETAUTHCFG: 1232 case SPPPSETLCPCFG: 1233 case SPPPSETIDLETO: 1234 case SPPPSETAUTHFAILURE: 1235 case SPPPSETDNSOPTS: 1236 case SPPPSETKEEPALIVE: 1237 #if defined(COMPAT_50) || defined(MODULAR) 1238 case __SPPPSETIDLETO50: 1239 case __SPPPSETKEEPALIVE50: 1240 #endif /* COMPAT_50 || MODULAR */ 1241 error = kauth_authorize_network(l->l_cred, 1242 KAUTH_NETWORK_INTERFACE, 1243 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, 1244 NULL); 1245 if (error) 1246 break; 1247 error = sppp_params(sp, cmd, data); 1248 break; 1249 1250 case SPPPGETAUTHCFG: 1251 case SPPPGETLCPCFG: 1252 case SPPPGETAUTHFAILURES: 1253 error = kauth_authorize_network(l->l_cred, 1254 KAUTH_NETWORK_INTERFACE, 1255 KAUTH_REQ_NETWORK_INTERFACE_GETPRIV, ifp, (void *)cmd, 1256 NULL); 1257 if (error) 1258 break; 1259 error = sppp_params(sp, cmd, data); 1260 break; 1261 1262 case SPPPGETSTATUS: 1263 case SPPPGETSTATUSNCP: 1264 case SPPPGETIDLETO: 1265 case SPPPGETDNSOPTS: 1266 case SPPPGETDNSADDRS: 1267 case SPPPGETKEEPALIVE: 1268 #if defined(COMPAT_50) || defined(MODULAR) 1269 case __SPPPGETIDLETO50: 1270 case __SPPPGETKEEPALIVE50: 1271 #endif /* COMPAT_50 || MODULAR */ 1272 case SPPPGETLCPSTATUS: 1273 case SPPPGETIPCPSTATUS: 1274 case SPPPGETIPV6CPSTATUS: 1275 error = sppp_params(sp, cmd, data); 1276 break; 1277 1278 default: 1279 error = ifioctl_common(ifp, cmd, data); 1280 break; 1281 } 1282 splx(s); 1283 return (error); 1284 } 1285 1286 /* 1287 * Cisco framing implementation. 1288 */ 1289 1290 /* 1291 * Handle incoming Cisco keepalive protocol packets. 1292 */ 1293 static void 1294 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1295 { 1296 STDDCL; 1297 struct cisco_packet *h; 1298 #ifdef INET 1299 uint32_t me, mymask = 0; /* XXX: GCC */ 1300 #endif 1301 1302 SPPP_LOCK(sp, RW_WRITER); 1303 1304 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1305 if (debug) 1306 log(LOG_DEBUG, 1307 "%s: cisco invalid packet length: %d bytes\n", 1308 ifp->if_xname, m->m_pkthdr.len); 1309 SPPP_UNLOCK(sp); 1310 return; 1311 } 1312 h = mtod(m, struct cisco_packet *); 1313 if (debug) 1314 log(LOG_DEBUG, 1315 "%s: cisco input: %d bytes " 1316 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1317 ifp->if_xname, m->m_pkthdr.len, 1318 ntohl(h->type), h->par1, h->par2, (u_int)h->rel, 1319 (u_int)h->time0, (u_int)h->time1); 1320 switch (ntohl(h->type)) { 1321 default: 1322 if (debug) 1323 addlog("%s: cisco unknown packet type: 0x%x\n", 1324 ifp->if_xname, ntohl(h->type)); 1325 break; 1326 case CISCO_ADDR_REPLY: 1327 /* Reply on address request, ignore */ 1328 break; 1329 case CISCO_KEEPALIVE_REQ: 1330 sp->pp_alivecnt = 0; 1331 sp->scp[IDX_LCP].rseq = ntohl(h->par1); 1332 if (sp->scp[IDX_LCP].seq == sp->scp[IDX_LCP].rseq) { 1333 /* Local and remote sequence numbers are equal. 1334 * Probably, the line is in loopback mode. */ 1335 if (sp->pp_loopcnt >= LOOPALIVECNT) { 1336 printf ("%s: loopback\n", 1337 ifp->if_xname); 1338 sp->pp_loopcnt = 0; 1339 if (ifp->if_flags & IFF_UP) { 1340 SPPP_UNLOCK(sp); 1341 if_down(ifp); 1342 SPPP_LOCK(sp, RW_WRITER); 1343 1344 IF_PURGE(&sp->pp_cpq); 1345 } 1346 } 1347 ++sp->pp_loopcnt; 1348 1349 /* Generate new local sequence number */ 1350 sp->scp[IDX_LCP].seq = cprng_fast32(); 1351 break; 1352 } 1353 sp->pp_loopcnt = 0; 1354 if (! (ifp->if_flags & IFF_UP) && 1355 (ifp->if_flags & IFF_RUNNING)) { 1356 SPPP_UNLOCK(sp); 1357 if_up(ifp); 1358 SPPP_LOCK(sp, RW_WRITER); 1359 } 1360 break; 1361 case CISCO_ADDR_REQ: 1362 #ifdef INET 1363 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1364 if (me != 0L) 1365 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1366 #endif 1367 break; 1368 } 1369 SPPP_UNLOCK(sp); 1370 } 1371 1372 /* 1373 * Send Cisco keepalive packet. 1374 */ 1375 static void 1376 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1377 { 1378 STDDCL; 1379 struct ppp_header *h; 1380 struct cisco_packet *ch; 1381 struct mbuf *m; 1382 uint32_t t; 1383 1384 KASSERT(SPPP_WLOCKED(sp)); 1385 1386 t = time_uptime * 1000; 1387 MGETHDR(m, M_DONTWAIT, MT_DATA); 1388 if (! m) 1389 return; 1390 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1391 m_reset_rcvif(m); 1392 1393 h = mtod(m, struct ppp_header *); 1394 h->address = CISCO_MULTICAST; 1395 h->control = 0; 1396 h->protocol = htons(CISCO_KEEPALIVE); 1397 1398 ch = (struct cisco_packet *)(h + 1); 1399 ch->type = htonl(type); 1400 ch->par1 = htonl(par1); 1401 ch->par2 = htonl(par2); 1402 ch->rel = -1; 1403 1404 ch->time0 = htons((u_short)(t >> 16)); 1405 ch->time1 = htons((u_short) t); 1406 1407 if (debug) 1408 log(LOG_DEBUG, 1409 "%s: cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1410 ifp->if_xname, ntohl(ch->type), ch->par1, 1411 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1412 (u_int)ch->time1); 1413 1414 if (IF_QFULL(&sp->pp_cpq)) { 1415 IF_DROP(&sp->pp_fastq); 1416 IF_DROP(&ifp->if_snd); 1417 m_freem(m); 1418 if_statinc(ifp, if_oerrors); 1419 return; 1420 } 1421 1422 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 1423 IF_ENQUEUE(&sp->pp_cpq, m); 1424 1425 if (! (ifp->if_flags & IFF_OACTIVE)) { 1426 SPPP_UNLOCK(sp); 1427 if_start_lock(ifp); 1428 SPPP_LOCK(sp, RW_WRITER); 1429 } 1430 } 1431 1432 /* 1433 * PPP protocol implementation. 1434 */ 1435 1436 /* 1437 * Send PPP control protocol packet. 1438 */ 1439 static void 1440 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1441 u_char ident, u_short len, void *data) 1442 { 1443 STDDCL; 1444 struct lcp_header *lh; 1445 struct mbuf *m; 1446 size_t pkthdrlen; 1447 1448 KASSERT(SPPP_WLOCKED(sp)); 1449 1450 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1451 1452 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1453 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1454 MGETHDR(m, M_DONTWAIT, MT_DATA); 1455 if (! m) { 1456 return; 1457 } 1458 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1459 m_reset_rcvif(m); 1460 1461 if (sp->pp_flags & PP_NOFRAMING) { 1462 *mtod(m, uint16_t *) = htons(proto); 1463 lh = (struct lcp_header *)(mtod(m, uint8_t *) + 2); 1464 } else { 1465 struct ppp_header *h; 1466 h = mtod(m, struct ppp_header *); 1467 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1468 h->control = PPP_UI; /* Unnumbered Info */ 1469 h->protocol = htons(proto); /* Link Control Protocol */ 1470 lh = (struct lcp_header *)(h + 1); 1471 } 1472 lh->type = type; 1473 lh->ident = ident; 1474 lh->len = htons(LCP_HEADER_LEN + len); 1475 if (len) 1476 memcpy(lh + 1, data, len); 1477 1478 if (debug) { 1479 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 1480 ifp->if_xname, 1481 sppp_proto_name(proto), 1482 sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len)); 1483 if (len) 1484 sppp_print_bytes((u_char *)(lh + 1), len); 1485 addlog(">\n"); 1486 } 1487 if (IF_QFULL(&sp->pp_cpq)) { 1488 IF_DROP(&sp->pp_fastq); 1489 IF_DROP(&ifp->if_snd); 1490 m_freem(m); 1491 if_statinc(ifp, if_oerrors); 1492 return; 1493 } 1494 1495 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 1496 IF_ENQUEUE(&sp->pp_cpq, m); 1497 1498 if (! (ifp->if_flags & IFF_OACTIVE)) { 1499 SPPP_UNLOCK(sp); 1500 if_start_lock(ifp); 1501 SPPP_LOCK(sp, RW_WRITER); 1502 } 1503 } 1504 1505 static void 1506 sppp_cp_to_lcp(void *xsp) 1507 { 1508 struct sppp *sp = xsp; 1509 1510 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_to); 1511 } 1512 1513 static void 1514 sppp_cp_to_ipcp(void *xsp) 1515 { 1516 struct sppp *sp = xsp; 1517 1518 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_IPCP].work_to); 1519 } 1520 1521 static void 1522 sppp_cp_to_ipv6cp(void *xsp) 1523 { 1524 struct sppp *sp = xsp; 1525 1526 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_IPV6CP].work_to); 1527 } 1528 1529 static void 1530 sppp_cp_to_pap(void *xsp) 1531 { 1532 struct sppp *sp = xsp; 1533 1534 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_to); 1535 } 1536 1537 static void 1538 sppp_cp_to_chap(void *xsp) 1539 { 1540 struct sppp *sp = xsp; 1541 1542 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_to); 1543 } 1544 1545 static void 1546 sppp_cp_init(const struct cp *cp, struct sppp *sp) 1547 { 1548 struct sppp_cp *scp; 1549 typedef void (*sppp_co_cb_t)(void *); 1550 static const sppp_co_cb_t to_cb[IDX_COUNT] = { 1551 [IDX_LCP] = sppp_cp_to_lcp, 1552 [IDX_IPCP] = sppp_cp_to_ipcp, 1553 [IDX_IPV6CP] = sppp_cp_to_ipv6cp, 1554 [IDX_PAP] = sppp_cp_to_pap, 1555 [IDX_CHAP] = sppp_cp_to_chap, 1556 }; 1557 1558 scp = &sp->scp[cp->protoidx]; 1559 scp->state = STATE_INITIAL; 1560 scp->fail_counter = 0; 1561 scp->seq = 0; 1562 scp->rseq = 0; 1563 1564 SPPP_WQ_SET(&scp->work_up, cp->Up, cp); 1565 SPPP_WQ_SET(&scp->work_down, cp->Down, cp); 1566 SPPP_WQ_SET(&scp->work_open, cp->Open, cp); 1567 SPPP_WQ_SET(&scp->work_close, cp->Close, cp); 1568 SPPP_WQ_SET(&scp->work_to, cp->TO, cp); 1569 SPPP_WQ_SET(&scp->work_rcr, sppp_rcr_event, cp); 1570 SPPP_WQ_SET(&scp->work_rca, sppp_rca_event, cp); 1571 SPPP_WQ_SET(&scp->work_rcn, sppp_rcn_event, cp); 1572 SPPP_WQ_SET(&scp->work_rtr, sppp_rtr_event, cp); 1573 SPPP_WQ_SET(&scp->work_rta, sppp_rta_event, cp); 1574 SPPP_WQ_SET(&scp->work_rxj, sppp_rxj_event, cp); 1575 1576 callout_init(&scp->ch, CALLOUT_MPSAFE); 1577 callout_setfunc(&scp->ch, to_cb[cp->protoidx], sp); 1578 } 1579 1580 static void 1581 sppp_cp_fini(const struct cp *cp, struct sppp *sp) 1582 { 1583 struct sppp_cp *scp; 1584 scp = &sp->scp[cp->protoidx]; 1585 1586 sppp_wq_wait(sp->wq_cp, &scp->work_up); 1587 sppp_wq_wait(sp->wq_cp, &scp->work_down); 1588 sppp_wq_wait(sp->wq_cp, &scp->work_open); 1589 sppp_wq_wait(sp->wq_cp, &scp->work_close); 1590 sppp_wq_wait(sp->wq_cp, &scp->work_to); 1591 sppp_wq_wait(sp->wq_cp, &scp->work_rcr); 1592 sppp_wq_wait(sp->wq_cp, &scp->work_rca); 1593 sppp_wq_wait(sp->wq_cp, &scp->work_rcn); 1594 sppp_wq_wait(sp->wq_cp, &scp->work_rtr); 1595 sppp_wq_wait(sp->wq_cp, &scp->work_rta); 1596 sppp_wq_wait(sp->wq_cp, &scp->work_rxj); 1597 1598 callout_halt(&scp->ch, NULL); 1599 callout_destroy(&scp->ch); 1600 } 1601 1602 /* 1603 * Handle incoming PPP control protocol packets. 1604 */ 1605 static void 1606 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1607 { 1608 STDDCL; 1609 struct lcp_header *h; 1610 int printlen, len = m->m_pkthdr.len; 1611 enum cp_rcr_type type; 1612 size_t blen, rlen; 1613 u_char *p; 1614 uint32_t u32; 1615 uint8_t *buf; 1616 1617 SPPP_LOCK(sp, RW_WRITER); 1618 1619 if (len < 4) { 1620 if (debug) 1621 log(LOG_DEBUG, 1622 "%s: %s invalid packet length: %d bytes\n", 1623 ifp->if_xname, cp->name, len); 1624 SPPP_UNLOCK(sp); 1625 return; 1626 } 1627 h = mtod(m, struct lcp_header *); 1628 if (debug) { 1629 printlen = ntohs(h->len); 1630 log(LOG_DEBUG, 1631 "%s: %s input(%s): <%s id=0x%x len=%d", 1632 ifp->if_xname, cp->name, 1633 sppp_state_name(sp->scp[cp->protoidx].state), 1634 sppp_cp_type_name(h->type), h->ident, printlen); 1635 if (len < printlen) 1636 printlen = len; 1637 if (printlen > 4) 1638 sppp_print_bytes((u_char *)(h + 1), printlen - 4); 1639 addlog(">\n"); 1640 } 1641 if (len > ntohs(h->len)) 1642 len = ntohs(h->len); 1643 p = (u_char *)(h + 1); 1644 switch (h->type) { 1645 case CONF_REQ: 1646 if (len < 4) { 1647 if (debug) 1648 addlog("%s: %s invalid conf-req length %d\n", 1649 ifp->if_xname, cp->name, 1650 len); 1651 if_statinc(ifp, if_ierrors); 1652 break; 1653 } 1654 1655 buf = NULL; 1656 blen = 0; 1657 rlen = 0; 1658 1659 type = (cp->parse_confreq)(sp, h, len, 1660 &buf, &blen, &rlen); 1661 1662 if (type == CP_RCR_ERR) { 1663 /* fatal error, shut down */ 1664 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 1665 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 1666 } else if (buf != NULL) { 1667 if (sp->scp[cp->protoidx].rcr_buf != NULL) { 1668 kmem_intr_free(sp->scp[cp->protoidx].rcr_buf, 1669 sp->scp[cp->protoidx].rcr_blen); 1670 } 1671 1672 sp->scp[cp->protoidx].rcr_buf = (void *)buf; 1673 buf = NULL; 1674 1675 sp->scp[cp->protoidx].rcr_blen = blen; 1676 sp->scp[cp->protoidx].rcr_rlen = rlen; 1677 sp->scp[cp->protoidx].rcr_type = type; 1678 sp->scp[cp->protoidx].rconfid = h->ident; 1679 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rcr); 1680 } 1681 break; 1682 case CONF_ACK: 1683 if (h->ident != sp->scp[cp->protoidx].confid) { 1684 if (debug) 1685 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1686 ifp->if_xname, cp->name, 1687 h->ident, sp->scp[cp->protoidx].confid); 1688 if_statinc(ifp, if_ierrors); 1689 break; 1690 } 1691 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rca); 1692 break; 1693 case CONF_NAK: 1694 case CONF_REJ: 1695 if (h->ident != sp->scp[cp->protoidx].confid) { 1696 if (debug) 1697 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1698 ifp->if_xname, cp->name, 1699 h->ident, sp->scp[cp->protoidx].confid); 1700 if_statinc(ifp, if_ierrors); 1701 break; 1702 } 1703 if (h->type == CONF_NAK) 1704 (cp->parse_confnak)(sp, h, len); 1705 else /* CONF_REJ */ 1706 (cp->parse_confrej)(sp, h, len); 1707 1708 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rcn); 1709 break; 1710 1711 case TERM_REQ: 1712 sp->scp[cp->protoidx].rseq = h->ident; 1713 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rtr); 1714 break; 1715 case TERM_ACK: 1716 if (h->ident != sp->scp[cp->protoidx].confid && 1717 h->ident != sp->scp[cp->protoidx].seq) { 1718 if (debug) 1719 addlog("%s: %s id mismatch " 1720 "0x%x != 0x%x and 0x%x != %0lx\n", 1721 ifp->if_xname, cp->name, 1722 h->ident, sp->scp[cp->protoidx].confid, 1723 h->ident, sp->scp[cp->protoidx].seq); 1724 if_statinc(ifp, if_ierrors); 1725 break; 1726 } 1727 1728 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rta); 1729 break; 1730 case CODE_REJ: 1731 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1732 log(LOG_INFO, 1733 "%s: %s: ignoring RXJ (%s) for code ?, " 1734 "danger will robinson\n", 1735 ifp->if_xname, cp->name, 1736 sppp_cp_type_name(h->type)); 1737 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rxj); 1738 break; 1739 case PROTO_REJ: 1740 { 1741 int catastrophic; 1742 const struct cp *upper; 1743 int i; 1744 uint16_t proto; 1745 1746 catastrophic = 0; 1747 upper = NULL; 1748 proto = p[0] << 8 | p[1]; 1749 for (i = 0; i < IDX_COUNT; i++) { 1750 if (cps[i]->proto == proto) { 1751 upper = cps[i]; 1752 break; 1753 } 1754 } 1755 if (upper == NULL) 1756 catastrophic++; 1757 1758 if (debug) 1759 log(LOG_INFO, 1760 "%s: %s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1761 ifp->if_xname, cp->name, catastrophic ? '-' : '+', 1762 sppp_cp_type_name(h->type), proto, 1763 upper ? upper->name : "unknown", 1764 upper ? sppp_state_name(sp->scp[upper->protoidx].state) : "?"); 1765 1766 /* 1767 * if we got RXJ+ against conf-req, the peer does not implement 1768 * this particular protocol type. terminate the protocol. 1769 */ 1770 if (upper && !catastrophic) { 1771 if (sp->scp[upper->protoidx].state == STATE_REQ_SENT) { 1772 sppp_wq_add(sp->wq_cp, 1773 &sp->scp[upper->protoidx].work_close); 1774 break; 1775 } 1776 } 1777 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rxj); 1778 break; 1779 } 1780 case DISC_REQ: 1781 if (cp->proto != PPP_LCP) 1782 goto illegal; 1783 /* Discard the packet. */ 1784 break; 1785 case ECHO_REQ: 1786 if (cp->proto != PPP_LCP) 1787 goto illegal; 1788 if (sp->scp[cp->protoidx].state != STATE_OPENED) { 1789 if (debug) 1790 addlog("%s: lcp echo req but lcp closed\n", 1791 ifp->if_xname); 1792 if_statinc(ifp, if_ierrors); 1793 break; 1794 } 1795 if (len < 8) { 1796 if (debug) 1797 addlog("%s: invalid lcp echo request " 1798 "packet length: %d bytes\n", 1799 ifp->if_xname, len); 1800 break; 1801 } 1802 memcpy(&u32, h + 1, sizeof u32); 1803 if (ntohl(u32) == sp->lcp.magic) { 1804 /* Line loopback mode detected. */ 1805 printf("%s: loopback\n", ifp->if_xname); 1806 SPPP_UNLOCK(sp); 1807 if_down(ifp); 1808 SPPP_LOCK(sp, RW_WRITER); 1809 1810 IF_PURGE(&sp->pp_cpq); 1811 1812 /* Shut down the PPP link. */ 1813 /* XXX */ 1814 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_down); 1815 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_up); 1816 break; 1817 } 1818 u32 = htonl(sp->lcp.magic); 1819 memcpy(h + 1, &u32, sizeof u32); 1820 if (debug) 1821 addlog("%s: got lcp echo req, sending echo rep\n", 1822 ifp->if_xname); 1823 sppp_cp_send(sp, PPP_LCP, ECHO_REPLY, h->ident, len - 4, 1824 h + 1); 1825 break; 1826 case ECHO_REPLY: 1827 if (cp->proto != PPP_LCP) 1828 goto illegal; 1829 if (h->ident != sp->lcp.echoid) { 1830 if_statinc(ifp, if_ierrors); 1831 break; 1832 } 1833 if (len < 8) { 1834 if (debug) 1835 addlog("%s: lcp invalid echo reply " 1836 "packet length: %d bytes\n", 1837 ifp->if_xname, len); 1838 break; 1839 } 1840 if (debug) 1841 addlog("%s: lcp got echo rep\n", 1842 ifp->if_xname); 1843 memcpy(&u32, h + 1, sizeof u32); 1844 if (ntohl(u32) != sp->lcp.magic) 1845 sp->pp_alivecnt = 0; 1846 break; 1847 default: 1848 /* Unknown packet type -- send Code-Reject packet. */ 1849 illegal: 1850 if (debug) 1851 addlog("%s: %s send code-rej for 0x%x\n", 1852 ifp->if_xname, cp->name, h->type); 1853 sppp_cp_send(sp, cp->proto, CODE_REJ, 1854 ++sp->scp[cp->protoidx].seq, m->m_pkthdr.len, h); 1855 if_statinc(ifp, if_ierrors); 1856 } 1857 1858 SPPP_UNLOCK(sp); 1859 } 1860 1861 /* 1862 * The generic part of all Up/Down/Open/Close/TO event handlers. 1863 * Basically, the state transition handling in the automaton. 1864 */ 1865 static void 1866 sppp_up_event(struct sppp *sp, void *xcp) 1867 { 1868 const struct cp *cp = xcp; 1869 STDDCL; 1870 1871 KASSERT(SPPP_WLOCKED(sp)); 1872 KASSERT(!cpu_softintr_p()); 1873 1874 if ((cp->flags & CP_AUTH) != 0 && 1875 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1876 return; 1877 1878 if (debug) 1879 log(LOG_DEBUG, "%s: %s up(%s)\n", 1880 ifp->if_xname, cp->name, 1881 sppp_state_name(sp->scp[cp->protoidx].state)); 1882 1883 switch (sp->scp[cp->protoidx].state) { 1884 case STATE_INITIAL: 1885 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1886 break; 1887 case STATE_STARTING: 1888 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 1889 (cp->scr)(sp); 1890 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1891 break; 1892 default: 1893 printf("%s: %s illegal up in state %s\n", 1894 ifp->if_xname, cp->name, 1895 sppp_state_name(sp->scp[cp->protoidx].state)); 1896 } 1897 } 1898 1899 static void 1900 sppp_down_event(struct sppp *sp, void *xcp) 1901 { 1902 const struct cp *cp = xcp; 1903 STDDCL; 1904 1905 KASSERT(SPPP_WLOCKED(sp)); 1906 KASSERT(!cpu_softintr_p()); 1907 1908 if ((cp->flags & CP_AUTH) != 0 && 1909 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1910 return; 1911 1912 if (debug) 1913 log(LOG_DEBUG, "%s: %s down(%s)\n", 1914 ifp->if_xname, cp->name, 1915 sppp_state_name(sp->scp[cp->protoidx].state)); 1916 1917 switch (sp->scp[cp->protoidx].state) { 1918 case STATE_CLOSED: 1919 case STATE_CLOSING: 1920 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1921 break; 1922 case STATE_STOPPED: 1923 (cp->tls)(cp, sp); 1924 /* fall through */ 1925 case STATE_STOPPING: 1926 case STATE_REQ_SENT: 1927 case STATE_ACK_RCVD: 1928 case STATE_ACK_SENT: 1929 sppp_cp_change_state(cp, sp, STATE_STARTING); 1930 break; 1931 case STATE_OPENED: 1932 (cp->tld)(sp); 1933 sppp_cp_change_state(cp, sp, STATE_STARTING); 1934 break; 1935 default: 1936 printf("%s: %s illegal down in state %s\n", 1937 ifp->if_xname, cp->name, 1938 sppp_state_name(sp->scp[cp->protoidx].state)); 1939 } 1940 } 1941 1942 static void 1943 sppp_open_event(struct sppp *sp, void *xcp) 1944 { 1945 const struct cp *cp = xcp; 1946 STDDCL; 1947 1948 KASSERT(SPPP_WLOCKED(sp)); 1949 KASSERT(!cpu_softintr_p()); 1950 1951 if ((cp->flags & CP_AUTH) != 0 && 1952 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1953 return; 1954 1955 if (debug) 1956 log(LOG_DEBUG, "%s: %s open(%s)\n", 1957 ifp->if_xname, cp->name, 1958 sppp_state_name(sp->scp[cp->protoidx].state)); 1959 1960 switch (sp->scp[cp->protoidx].state) { 1961 case STATE_INITIAL: 1962 sppp_cp_change_state(cp, sp, STATE_STARTING); 1963 (cp->tls)(cp, sp); 1964 break; 1965 case STATE_STARTING: 1966 break; 1967 case STATE_CLOSED: 1968 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 1969 (cp->scr)(sp); 1970 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1971 break; 1972 case STATE_STOPPED: 1973 case STATE_STOPPING: 1974 case STATE_REQ_SENT: 1975 case STATE_ACK_RCVD: 1976 case STATE_ACK_SENT: 1977 case STATE_OPENED: 1978 break; 1979 case STATE_CLOSING: 1980 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1981 break; 1982 } 1983 } 1984 1985 static void 1986 sppp_close_event(struct sppp *sp, void *xcp) 1987 { 1988 const struct cp *cp = xcp; 1989 STDDCL; 1990 1991 KASSERT(SPPP_WLOCKED(sp)); 1992 KASSERT(!cpu_softintr_p()); 1993 1994 if ((cp->flags & CP_AUTH) != 0 && 1995 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1996 return; 1997 1998 if (debug) 1999 log(LOG_DEBUG, "%s: %s close(%s)\n", 2000 ifp->if_xname, cp->name, 2001 sppp_state_name(sp->scp[cp->protoidx].state)); 2002 2003 switch (sp->scp[cp->protoidx].state) { 2004 case STATE_INITIAL: 2005 case STATE_CLOSED: 2006 case STATE_CLOSING: 2007 break; 2008 case STATE_STARTING: 2009 sppp_cp_change_state(cp, sp, STATE_INITIAL); 2010 (cp->tlf)(cp, sp); 2011 break; 2012 case STATE_STOPPED: 2013 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2014 break; 2015 case STATE_STOPPING: 2016 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2017 break; 2018 case STATE_OPENED: 2019 (cp->tld)(sp); 2020 /* fall through */ 2021 case STATE_REQ_SENT: 2022 case STATE_ACK_RCVD: 2023 case STATE_ACK_SENT: 2024 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_terminate; 2025 if ((cp->flags & CP_AUTH) == 0) { 2026 sppp_cp_send(sp, cp->proto, TERM_REQ, 2027 ++sp->scp[cp->protoidx].seq, 0, 0); 2028 } 2029 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2030 break; 2031 } 2032 } 2033 2034 static void 2035 sppp_to_event(struct sppp *sp, void *xcp) 2036 { 2037 const struct cp *cp = xcp; 2038 int s; 2039 STDDCL; 2040 2041 KASSERT(SPPP_WLOCKED(sp)); 2042 KASSERT(!cpu_softintr_p()); 2043 2044 s = splnet(); 2045 2046 if (debug) 2047 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 2048 ifp->if_xname, cp->name, 2049 sppp_state_name(sp->scp[cp->protoidx].state), 2050 sp->scp[cp->protoidx].rst_counter); 2051 2052 if (--sp->scp[cp->protoidx].rst_counter < 0) 2053 /* TO- event */ 2054 switch (sp->scp[cp->protoidx].state) { 2055 case STATE_CLOSING: 2056 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2057 (cp->tlf)(cp, sp); 2058 break; 2059 case STATE_STOPPING: 2060 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2061 (cp->tlf)(cp, sp); 2062 break; 2063 case STATE_REQ_SENT: 2064 case STATE_ACK_RCVD: 2065 case STATE_ACK_SENT: 2066 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2067 (cp->tlf)(cp, sp); 2068 break; 2069 } 2070 else 2071 /* TO+ event */ 2072 switch (sp->scp[cp->protoidx].state) { 2073 case STATE_CLOSING: 2074 case STATE_STOPPING: 2075 if ((cp->flags & CP_AUTH) == 0) { 2076 sppp_cp_send(sp, cp->proto, TERM_REQ, 2077 ++sp->scp[cp->protoidx].seq, 0, 0); 2078 } 2079 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2080 break; 2081 case STATE_REQ_SENT: 2082 case STATE_ACK_RCVD: 2083 (cp->scr)(sp); 2084 /* sppp_cp_change_state() will restart the timer */ 2085 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2086 break; 2087 case STATE_ACK_SENT: 2088 (cp->scr)(sp); 2089 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2090 break; 2091 } 2092 2093 splx(s); 2094 } 2095 2096 static void 2097 sppp_rcr_event(struct sppp *sp, void *xcp) 2098 { 2099 const struct cp *cp = xcp; 2100 enum cp_rcr_type type; 2101 void *buf; 2102 size_t blen; 2103 STDDCL; 2104 2105 KASSERT(!cpu_softintr_p()); 2106 2107 type = sp->scp[cp->protoidx].rcr_type; 2108 buf = sp->scp[cp->protoidx].rcr_buf; 2109 blen = sp->scp[cp->protoidx].rcr_blen; 2110 2111 if (type == CP_RCR_ACK) { 2112 /* RCR+ event */ 2113 switch (sp->scp[cp->protoidx].state) { 2114 case STATE_OPENED: 2115 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2116 cp->tld(sp); 2117 cp->scr(sp); 2118 cp->scan(cp, sp); 2119 break; 2120 case STATE_ACK_SENT: 2121 case STATE_REQ_SENT: 2122 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2123 cp->scan(cp, sp); 2124 break; 2125 case STATE_STOPPED: 2126 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2127 cp->scr(sp); 2128 cp->scan(cp, sp); 2129 break; 2130 case STATE_ACK_RCVD: 2131 sppp_cp_change_state(cp, sp, STATE_OPENED); 2132 if (debug) 2133 log(LOG_DEBUG, "%s: %s tlu\n", 2134 ifp->if_xname, 2135 cp->name); 2136 cp->tlu(sp); 2137 cp->scan(cp, sp); 2138 break; 2139 case STATE_CLOSING: 2140 case STATE_STOPPING: 2141 if (buf != NULL) { 2142 sp->scp[cp->protoidx].rcr_buf = NULL; 2143 sp->scp[cp->protoidx].rcr_blen = 0; 2144 kmem_free(buf, blen); 2145 } 2146 break; 2147 case STATE_CLOSED: 2148 if ((cp->flags & CP_AUTH) == 0) { 2149 sppp_cp_send(sp, cp->proto, TERM_ACK, 2150 sp->scp[cp->protoidx].rconfid, 0, 0); 2151 } 2152 break; 2153 default: 2154 printf("%s: %s illegal RCR+ in state %s\n", 2155 ifp->if_xname, cp->name, 2156 sppp_state_name(sp->scp[cp->protoidx].state)); 2157 if_statinc(ifp, if_ierrors); 2158 } 2159 } else { 2160 /* RCR- event */ 2161 switch (sp->scp[cp->protoidx].state) { 2162 case STATE_OPENED: 2163 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2164 cp->tld(sp); 2165 cp->scr(sp); 2166 cp->scan(cp, sp); 2167 break; 2168 case STATE_ACK_SENT: 2169 case STATE_REQ_SENT: 2170 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2171 cp->scan(cp, sp); 2172 break; 2173 case STATE_STOPPED: 2174 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2175 cp->scr(sp); 2176 cp->scan(cp, sp); 2177 break; 2178 case STATE_ACK_RCVD: 2179 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2180 cp->scan(cp, sp); 2181 break; 2182 case STATE_CLOSING: 2183 case STATE_STOPPING: 2184 if (buf != NULL) { 2185 sp->scp[cp->protoidx].rcr_buf = NULL; 2186 sp->scp[cp->protoidx].rcr_blen = 0; 2187 kmem_free(buf, blen); 2188 } 2189 break; 2190 case STATE_CLOSED: 2191 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2192 if ((cp->flags & CP_AUTH) == 0) { 2193 sppp_cp_send(sp, cp->proto, TERM_ACK, 2194 sp->scp[cp->protoidx].rconfid, 0, 0); 2195 } 2196 break; 2197 default: 2198 printf("%s: %s illegal RCR- in state %s\n", 2199 ifp->if_xname, cp->name, 2200 sppp_state_name(sp->scp[cp->protoidx].state)); 2201 if_statinc(ifp, if_ierrors); 2202 } 2203 } 2204 } 2205 2206 static void 2207 sppp_rca_event(struct sppp *sp, void *xcp) 2208 { 2209 const struct cp *cp = xcp; 2210 STDDCL; 2211 2212 KASSERT(!cpu_softintr_p()); 2213 2214 switch (sp->scp[cp->protoidx].state) { 2215 case STATE_CLOSED: 2216 case STATE_STOPPED: 2217 if ((cp->flags & CP_AUTH) == 0) { 2218 sppp_cp_send(sp, cp->proto, TERM_ACK, 2219 sp->scp[cp->protoidx].rconfid, 0, 0); 2220 } 2221 break; 2222 case STATE_CLOSING: 2223 case STATE_STOPPING: 2224 break; 2225 case STATE_REQ_SENT: 2226 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2227 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2228 break; 2229 case STATE_OPENED: 2230 (cp->tld)(sp); 2231 /* fall through */ 2232 case STATE_ACK_RCVD: 2233 (cp->scr)(sp); 2234 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2235 break; 2236 case STATE_ACK_SENT: 2237 sppp_cp_change_state(cp, sp, STATE_OPENED); 2238 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2239 if (debug) 2240 log(LOG_DEBUG, "%s: %s tlu\n", 2241 ifp->if_xname, cp->name); 2242 (cp->tlu)(sp); 2243 break; 2244 default: 2245 printf("%s: %s illegal RCA in state %s\n", 2246 ifp->if_xname, cp->name, 2247 sppp_state_name(sp->scp[cp->protoidx].state)); 2248 if_statinc(ifp, if_ierrors); 2249 } 2250 } 2251 2252 static void 2253 sppp_rcn_event(struct sppp *sp, void *xcp) 2254 { 2255 const struct cp *cp = xcp; 2256 struct ifnet *ifp = &sp->pp_if; 2257 2258 KASSERT(!cpu_softintr_p()); 2259 2260 switch (sp->scp[cp->protoidx].state) { 2261 case STATE_CLOSED: 2262 case STATE_STOPPED: 2263 if ((cp->flags & CP_AUTH) == 0) { 2264 sppp_cp_send(sp, cp->proto, TERM_ACK, 2265 sp->scp[cp->protoidx].rconfid, 0, 0); 2266 } 2267 break; 2268 case STATE_REQ_SENT: 2269 case STATE_ACK_SENT: 2270 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2271 (cp->scr)(sp); 2272 break; 2273 case STATE_OPENED: 2274 (cp->tld)(sp); 2275 /* fall through */ 2276 case STATE_ACK_RCVD: 2277 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2278 (cp->scr)(sp); 2279 break; 2280 case STATE_CLOSING: 2281 case STATE_STOPPING: 2282 break; 2283 default: 2284 printf("%s: %s illegal RCN in state %s\n", 2285 ifp->if_xname, cp->name, 2286 sppp_state_name(sp->scp[cp->protoidx].state)); 2287 if_statinc(ifp, if_ierrors); 2288 } 2289 } 2290 2291 static void 2292 sppp_rtr_event(struct sppp *sp, void *xcp) 2293 { 2294 const struct cp *cp = xcp; 2295 STDDCL; 2296 2297 KASSERT(!cpu_softintr_p()); 2298 2299 switch (sp->scp[cp->protoidx].state) { 2300 case STATE_ACK_RCVD: 2301 case STATE_ACK_SENT: 2302 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2303 break; 2304 case STATE_CLOSED: 2305 case STATE_STOPPED: 2306 case STATE_CLOSING: 2307 case STATE_STOPPING: 2308 case STATE_REQ_SENT: 2309 break; 2310 case STATE_OPENED: 2311 (cp->tld)(sp); 2312 sp->scp[cp->protoidx].rst_counter = 0; 2313 sppp_cp_change_state(cp, sp, STATE_STOPPING); 2314 break; 2315 default: 2316 printf("%s: %s illegal RTR in state %s\n", 2317 ifp->if_xname, cp->name, 2318 sppp_state_name(sp->scp[cp->protoidx].state)); 2319 if_statinc(ifp, if_ierrors); 2320 return; 2321 } 2322 2323 /* Send Terminate-Ack packet. */ 2324 if (debug) 2325 log(LOG_DEBUG, "%s: %s send terminate-ack\n", 2326 ifp->if_xname, cp->name); 2327 if ((cp->flags & CP_AUTH) == 0) { 2328 sppp_cp_send(sp, cp->proto, TERM_ACK, 2329 sp->scp[cp->protoidx].rseq, 0, 0); 2330 } 2331 } 2332 2333 static void 2334 sppp_rta_event(struct sppp *sp, void *xcp) 2335 { 2336 const struct cp *cp = xcp; 2337 struct ifnet *ifp = &sp->pp_if; 2338 2339 KASSERT(!cpu_softintr_p()); 2340 2341 switch (sp->scp[cp->protoidx].state) { 2342 case STATE_CLOSED: 2343 case STATE_STOPPED: 2344 case STATE_REQ_SENT: 2345 case STATE_ACK_SENT: 2346 break; 2347 case STATE_CLOSING: 2348 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2349 (cp->tlf)(cp, sp); 2350 break; 2351 case STATE_STOPPING: 2352 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2353 (cp->tlf)(cp, sp); 2354 break; 2355 case STATE_ACK_RCVD: 2356 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2357 break; 2358 case STATE_OPENED: 2359 (cp->tld)(sp); 2360 (cp->scr)(sp); 2361 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2362 break; 2363 default: 2364 printf("%s: %s illegal RTA in state %s\n", 2365 ifp->if_xname, cp->name, 2366 sppp_state_name(sp->scp[cp->protoidx].state)); 2367 if_statinc(ifp, if_ierrors); 2368 } 2369 } 2370 2371 static void 2372 sppp_rxj_event(struct sppp *sp, void *xcp) 2373 { 2374 const struct cp *cp = xcp; 2375 struct ifnet *ifp = &sp->pp_if; 2376 2377 KASSERT(!cpu_softintr_p()); 2378 2379 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 2380 switch (sp->scp[cp->protoidx].state) { 2381 case STATE_CLOSED: 2382 case STATE_STOPPED: 2383 case STATE_REQ_SENT: 2384 case STATE_ACK_SENT: 2385 case STATE_CLOSING: 2386 case STATE_STOPPING: 2387 case STATE_OPENED: 2388 break; 2389 case STATE_ACK_RCVD: 2390 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2391 break; 2392 default: 2393 printf("%s: %s illegal RXJ- in state %s\n", 2394 ifp->if_xname, cp->name, 2395 sppp_state_name(sp->scp[cp->protoidx].state)); 2396 if_statinc(ifp, if_ierrors); 2397 } 2398 } 2399 2400 /* 2401 * Change the state of a control protocol in the state automaton. 2402 * Takes care of starting/stopping the restart timer. 2403 */ 2404 void 2405 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 2406 { 2407 2408 KASSERT(SPPP_WLOCKED(sp)); 2409 2410 sp->scp[cp->protoidx].state = newstate; 2411 callout_stop(&sp->scp[cp->protoidx].ch); 2412 switch (newstate) { 2413 case STATE_INITIAL: 2414 case STATE_STARTING: 2415 case STATE_CLOSED: 2416 case STATE_STOPPED: 2417 case STATE_OPENED: 2418 break; 2419 case STATE_CLOSING: 2420 case STATE_STOPPING: 2421 case STATE_REQ_SENT: 2422 case STATE_ACK_RCVD: 2423 case STATE_ACK_SENT: 2424 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2425 break; 2426 } 2427 } 2428 2429 /* 2430 *--------------------------------------------------------------------------* 2431 * * 2432 * The LCP implementation. * 2433 * * 2434 *--------------------------------------------------------------------------* 2435 */ 2436 static void 2437 sppp_lcp_init(struct sppp *sp) 2438 { 2439 2440 KASSERT(SPPP_WLOCKED(sp)); 2441 2442 sppp_cp_init(&lcp, sp); 2443 2444 SET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC); 2445 sp->lcp.magic = 0; 2446 sp->lcp.protos = 0; 2447 sp->lcp.max_terminate = 2; 2448 sp->lcp.max_configure = 10; 2449 sp->lcp.max_failure = 10; 2450 sp->lcp.tlf_sent = false; 2451 2452 /* 2453 * Initialize counters and timeout values. Note that we don't 2454 * use the 3 seconds suggested in RFC 1661 since we are likely 2455 * running on a fast link. XXX We should probably implement 2456 * the exponential backoff option. Note that these values are 2457 * relevant for all control protocols, not just LCP only. 2458 */ 2459 sp->lcp.timeout = 1 * hz; 2460 } 2461 2462 static void 2463 sppp_lcp_up(struct sppp *sp, void *xcp) 2464 { 2465 const struct cp *cp = xcp; 2466 int pidx; 2467 STDDCL; 2468 2469 KASSERT(SPPP_WLOCKED(sp)); 2470 2471 pidx = cp->protoidx; 2472 /* Initialize activity timestamp: opening a connection is an activity */ 2473 sp->pp_last_receive = sp->pp_last_activity = time_uptime; 2474 2475 /* 2476 * If this interface is passive or dial-on-demand, and we are 2477 * still in Initial state, it means we've got an incoming 2478 * call. Activate the interface. 2479 */ 2480 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2481 if (debug) 2482 log(LOG_DEBUG, 2483 "%s: Up event", ifp->if_xname); 2484 ifp->if_flags |= IFF_RUNNING; 2485 if (sp->scp[pidx].state == STATE_INITIAL) { 2486 if (debug) 2487 addlog("(incoming call)\n"); 2488 sp->pp_flags |= PP_CALLIN; 2489 sppp_wq_add(sp->wq_cp, &sp->scp[pidx].work_open); 2490 } else if (debug) 2491 addlog("\n"); 2492 } 2493 2494 sppp_up_event(sp, xcp); 2495 } 2496 2497 static void 2498 sppp_lcp_down(struct sppp *sp, void *xcp) 2499 { 2500 const struct cp *cp = xcp; 2501 int pidx; 2502 STDDCL; 2503 2504 KASSERT(SPPP_WLOCKED(sp)); 2505 KASSERT(!cpu_softintr_p()); 2506 2507 pidx = cp->protoidx; 2508 sppp_down_event(sp, xcp); 2509 2510 /* 2511 * We need to do tls to restart when a down event is caused 2512 * by the last tlf. 2513 */ 2514 if (sp->scp[pidx].state == STATE_STARTING && 2515 sp->lcp.tlf_sent) { 2516 cp->tls(cp, sp); 2517 sp->lcp.tlf_sent = false; 2518 } 2519 2520 /* 2521 * If this is neither a dial-on-demand nor a passive 2522 * interface, simulate an ``ifconfig down'' action, so the 2523 * administrator can force a redial by another ``ifconfig 2524 * up''. XXX For leased line operation, should we immediately 2525 * try to reopen the connection here? 2526 */ 2527 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2528 if (debug) 2529 log(LOG_INFO, 2530 "%s: Down event (carrier loss), taking interface down.\n", 2531 ifp->if_xname); 2532 SPPP_UNLOCK(sp); 2533 if_down(ifp); 2534 SPPP_LOCK(sp, RW_WRITER); 2535 2536 if (sp->lcp.reestablish) 2537 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 2538 } else { 2539 if (debug) 2540 log(LOG_DEBUG, 2541 "%s: Down event (carrier loss)\n", 2542 ifp->if_xname); 2543 2544 sp->pp_flags &= ~PP_CALLIN; 2545 if (sp->scp[pidx].state != STATE_INITIAL) 2546 sppp_wq_add(sp->wq_cp, &sp->scp[pidx].work_close); 2547 ifp->if_flags &= ~IFF_RUNNING; 2548 } 2549 sp->scp[pidx].fail_counter = 0; 2550 } 2551 2552 static void 2553 sppp_lcp_open(struct sppp *sp, void *xcp) 2554 { 2555 2556 KASSERT(SPPP_WLOCKED(sp)); 2557 KASSERT(!cpu_softintr_p()); 2558 2559 sp->lcp.reestablish = false; 2560 2561 if (sp->pp_if.if_mtu < PP_MTU) { 2562 sp->lcp.mru = sp->pp_if.if_mtu; 2563 SET(sp->lcp.opts, SPPP_LCP_OPT_MRU); 2564 } else 2565 sp->lcp.mru = PP_MTU; 2566 sp->lcp.their_mru = PP_MTU; 2567 2568 /* 2569 * If we are authenticator, negotiate LCP_AUTH 2570 */ 2571 if (sp->hisauth.proto != 0) 2572 SET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 2573 else 2574 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 2575 sp->pp_flags &= ~PP_NEEDAUTH; 2576 sppp_open_event(sp, xcp); 2577 } 2578 2579 /* 2580 * Analyze a configure request. Return true if it was agreeable, and 2581 * caused action sca, false if it has been rejected or nak'ed, and 2582 * caused action scn. (The return value is used to make the state 2583 * transition decision in the state automaton.) 2584 */ 2585 static enum cp_rcr_type 2586 sppp_lcp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 2587 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 2588 { 2589 STDDCL; 2590 u_char *buf, *r, *p, l, blen; 2591 enum cp_rcr_type type; 2592 int len, rlen; 2593 uint32_t nmagic; 2594 u_short authproto; 2595 2596 KASSERT(SPPP_WLOCKED(sp)); 2597 2598 if (origlen < sizeof(*h)) 2599 return CP_RCR_DROP; 2600 2601 origlen -= sizeof(*h); 2602 type = CP_RCR_NONE; 2603 type = 0; 2604 2605 if (origlen <= 0) 2606 return CP_RCR_DROP; 2607 else 2608 blen = origlen; 2609 2610 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 2611 if (buf == NULL) 2612 return CP_RCR_DROP; 2613 2614 if (debug) 2615 log(LOG_DEBUG, "%s: lcp parse opts:", 2616 ifp->if_xname); 2617 2618 /* pass 1: check for things that need to be rejected */ 2619 p = (void *)(h + 1); 2620 r = buf; 2621 rlen = 0; 2622 for (len = origlen; len > 1; len-= l, p += l) { 2623 l = p[1]; 2624 if (l == 0) 2625 break; 2626 2627 /* Sanity check option length */ 2628 if (l > len) { 2629 /* 2630 * Malicious option - drop immediately. 2631 * XXX Maybe we should just RXJ it? 2632 */ 2633 addlog("%s: received malicious LCP option 0x%02x, " 2634 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp->if_xname, 2635 p[0], l, len); 2636 type = CP_RCR_ERR; 2637 goto end; 2638 } 2639 if (debug) 2640 addlog(" %s", sppp_lcp_opt_name(*p)); 2641 switch (p[0]) { 2642 case LCP_OPT_MAGIC: 2643 /* Magic number. */ 2644 /* fall through, both are same length */ 2645 case LCP_OPT_ASYNC_MAP: 2646 /* Async control character map. */ 2647 if (len >= 6 || l == 6) 2648 continue; 2649 if (debug) 2650 addlog(" [invalid]"); 2651 break; 2652 case LCP_OPT_MP_EID: 2653 if (len >= l && l >= 3) { 2654 switch (p[2]) { 2655 case 0: if (l==3+ 0) continue;break; 2656 case 2: if (l==3+ 4) continue;break; 2657 case 3: if (l==3+ 6) continue;break; 2658 case 6: if (l==3+16) continue;break; 2659 case 1: /* FALLTHROUGH */ 2660 case 4: if (l<=3+20) continue;break; 2661 case 5: if (l<=3+15) continue;break; 2662 /* XXX should it be default: continue;? */ 2663 } 2664 } 2665 if (debug) 2666 addlog(" [invalid class %d len %d]", p[2], l); 2667 break; 2668 case LCP_OPT_MP_SSNHF: 2669 if (len >= 2 && l == 2) { 2670 if (debug) 2671 addlog(" [rej]"); 2672 break; 2673 } 2674 if (debug) 2675 addlog(" [invalid]"); 2676 break; 2677 case LCP_OPT_MP_MRRU: 2678 /* Multilink maximum received reconstructed unit */ 2679 /* should be fall through, both are same length */ 2680 /* FALLTHROUGH */ 2681 case LCP_OPT_MRU: 2682 /* Maximum receive unit. */ 2683 if (len >= 4 && l == 4) 2684 continue; 2685 if (debug) 2686 addlog(" [invalid]"); 2687 break; 2688 case LCP_OPT_AUTH_PROTO: 2689 if (len < 4) { 2690 if (debug) 2691 addlog(" [invalid]"); 2692 break; 2693 } 2694 authproto = (p[2] << 8) + p[3]; 2695 if (authproto == PPP_CHAP && l != 5) { 2696 if (debug) 2697 addlog(" [invalid chap len]"); 2698 break; 2699 } 2700 if (sp->myauth.proto == 0) { 2701 /* we are not configured to do auth */ 2702 if (debug) 2703 addlog(" [not configured]"); 2704 break; 2705 } 2706 /* 2707 * Remote want us to authenticate, remember this, 2708 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2709 * up. 2710 */ 2711 sp->pp_flags |= PP_NEEDAUTH; 2712 continue; 2713 default: 2714 /* Others not supported. */ 2715 if (debug) 2716 addlog(" [rej]"); 2717 break; 2718 } 2719 if (rlen + l > blen) { 2720 if (debug) 2721 addlog(" [overflow]"); 2722 continue; 2723 } 2724 /* Add the option to rejected list. */ 2725 memcpy(r, p, l); 2726 r += l; 2727 rlen += l; 2728 } 2729 2730 if (rlen > 0) { 2731 type = CP_RCR_REJ; 2732 goto end; 2733 } 2734 2735 if (debug) 2736 addlog("\n"); 2737 2738 /* 2739 * pass 2: check for option values that are unacceptable and 2740 * thus require to be nak'ed. 2741 */ 2742 if (debug) 2743 log(LOG_DEBUG, "%s: lcp parse opt values: ", 2744 ifp->if_xname); 2745 2746 p = (void *)(h + 1); 2747 r = buf; 2748 rlen = 0; 2749 for (len = origlen; len > 0; len -= l, p += l) { 2750 l = p[1]; 2751 if (l == 0) 2752 break; 2753 2754 if (debug) 2755 addlog(" %s", sppp_lcp_opt_name(*p)); 2756 switch (p[0]) { 2757 case LCP_OPT_MAGIC: 2758 /* Magic number -- extract. */ 2759 nmagic = (uint32_t)p[2] << 24 | 2760 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2761 if (nmagic != sp->lcp.magic) { 2762 if (debug) 2763 addlog(" 0x%x", nmagic); 2764 continue; 2765 } 2766 /* 2767 * Local and remote magics equal -- loopback? 2768 */ 2769 if (sp->pp_loopcnt >= LOOPALIVECNT*5) { 2770 printf ("%s: loopback\n", 2771 ifp->if_xname); 2772 sp->pp_loopcnt = 0; 2773 if (ifp->if_flags & IFF_UP) { 2774 SPPP_UNLOCK(sp); 2775 if_down(ifp); 2776 SPPP_LOCK(sp, RW_WRITER); 2777 2778 IF_PURGE(&sp->pp_cpq); 2779 /* XXX ? */ 2780 sppp_wq_add(sp->wq_cp, 2781 &sp->scp[IDX_LCP].work_down); 2782 sppp_wq_add(sp->wq_cp, 2783 &sp->scp[IDX_LCP].work_up); 2784 } 2785 } else if (debug) 2786 addlog(" [glitch]"); 2787 ++sp->pp_loopcnt; 2788 /* 2789 * We negate our magic here, and NAK it. If 2790 * we see it later in an NAK packet, we 2791 * suggest a new one. 2792 */ 2793 nmagic = ~sp->lcp.magic; 2794 /* Gonna NAK it. */ 2795 p[2] = nmagic >> 24; 2796 p[3] = nmagic >> 16; 2797 p[4] = nmagic >> 8; 2798 p[5] = nmagic; 2799 break; 2800 2801 case LCP_OPT_ASYNC_MAP: 2802 /* 2803 * Async control character map -- just ignore it. 2804 * 2805 * Quote from RFC 1662, chapter 6: 2806 * To enable this functionality, synchronous PPP 2807 * implementations MUST always respond to the 2808 * Async-Control-Character-Map Configuration 2809 * Option with the LCP Configure-Ack. However, 2810 * acceptance of the Configuration Option does 2811 * not imply that the synchronous implementation 2812 * will do any ACCM mapping. Instead, all such 2813 * octet mapping will be performed by the 2814 * asynchronous-to-synchronous converter. 2815 */ 2816 continue; 2817 2818 case LCP_OPT_MRU: 2819 /* 2820 * Maximum receive unit. Always agreeable, 2821 * but ignored by now. 2822 */ 2823 sp->lcp.their_mru = p[2] * 256 + p[3]; 2824 if (debug) 2825 addlog(" %ld", sp->lcp.their_mru); 2826 continue; 2827 2828 case LCP_OPT_AUTH_PROTO: 2829 authproto = (p[2] << 8) + p[3]; 2830 if (sp->myauth.proto != authproto) { 2831 /* not agreed, nak */ 2832 if (debug) 2833 addlog(" [mine %s != his %s]", 2834 sppp_proto_name(sp->myauth.proto), 2835 sppp_proto_name(authproto)); 2836 p[2] = sp->myauth.proto >> 8; 2837 p[3] = sp->myauth.proto; 2838 break; 2839 } 2840 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2841 if (debug) 2842 addlog(" [chap not MD5]"); 2843 p[4] = CHAP_MD5; 2844 break; 2845 } 2846 continue; 2847 case LCP_OPT_MP_EID: 2848 /* 2849 * Endpoint identification. 2850 * Always agreeable, 2851 * but ignored by now. 2852 */ 2853 if (debug) { 2854 addlog(" type %d", p[2]); 2855 sppp_print_bytes(p+3, p[1]-3); 2856 } 2857 continue; 2858 case LCP_OPT_MP_MRRU: 2859 /* 2860 * Maximum received reconstructed unit. 2861 * Always agreeable, 2862 * but ignored by now. 2863 */ 2864 sp->lcp.their_mrru = p[2] * 256 + p[3]; 2865 if (debug) 2866 addlog(" %ld", sp->lcp.their_mrru); 2867 continue; 2868 } 2869 if (rlen + l > blen) { 2870 if (debug) 2871 addlog(" [overflow]"); 2872 continue; 2873 } 2874 /* Add the option to nak'ed list. */ 2875 memcpy(r, p, l); 2876 r += l; 2877 rlen += l; 2878 } 2879 2880 if (rlen > 0) { 2881 if (++sp->scp[IDX_LCP].fail_counter >= sp->lcp.max_failure) { 2882 if (debug) 2883 addlog(" max_failure (%d) exceeded, ", 2884 sp->lcp.max_failure); 2885 type = CP_RCR_REJ; 2886 } else { 2887 type = CP_RCR_NAK; 2888 } 2889 } else { 2890 type = CP_RCR_ACK; 2891 rlen = origlen; 2892 memcpy(r, h + 1, rlen); 2893 sp->scp[IDX_LCP].fail_counter = 0; 2894 sp->pp_loopcnt = 0; 2895 } 2896 2897 end: 2898 if (debug) 2899 addlog("\n"); 2900 2901 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 2902 if (buf != NULL) 2903 kmem_intr_free(buf, blen); 2904 } else { 2905 *msgbuf = buf; 2906 *buflen = blen; 2907 *msglen = rlen; 2908 } 2909 2910 return type; 2911 } 2912 2913 /* 2914 * Analyze the LCP Configure-Reject option list, and adjust our 2915 * negotiation. 2916 */ 2917 static void 2918 sppp_lcp_confrej(struct sppp *sp, struct lcp_header *h, int len) 2919 { 2920 STDDCL; 2921 u_char *p, l; 2922 2923 KASSERT(SPPP_WLOCKED(sp)); 2924 2925 if (len <= sizeof(*h)) 2926 return; 2927 2928 len -= sizeof(*h); 2929 2930 if (debug) 2931 log(LOG_DEBUG, "%s: lcp rej opts:", 2932 ifp->if_xname); 2933 2934 p = (void *)(h + 1); 2935 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2936 /* Sanity check option length */ 2937 if (l > len) { 2938 /* 2939 * Malicious option - drop immediately. 2940 * XXX Maybe we should just RXJ it? 2941 */ 2942 addlog("%s: received malicious LCP option, " 2943 "dropping.\n", ifp->if_xname); 2944 goto end; 2945 } 2946 if (debug) 2947 addlog(" %s", sppp_lcp_opt_name(*p)); 2948 switch (p[0]) { 2949 case LCP_OPT_MAGIC: 2950 /* Magic number -- can't use it, use 0 */ 2951 CLR(sp->lcp.opts, SPPP_LCP_OPT_MAGIC); 2952 sp->lcp.magic = 0; 2953 break; 2954 case LCP_OPT_MRU: 2955 /* 2956 * We try to negotiate a lower MRU if the underlying 2957 * link's MTU is less than PP_MTU (e.g. PPPoE). If the 2958 * peer rejects this lower rate, fallback to the 2959 * default. 2960 */ 2961 if (debug) { 2962 addlog("%s: warning: peer rejected our MRU of " 2963 "%ld bytes. Defaulting to %d bytes\n", 2964 ifp->if_xname, sp->lcp.mru, PP_MTU); 2965 } 2966 CLR(sp->lcp.opts, SPPP_LCP_OPT_MRU); 2967 sp->lcp.mru = PP_MTU; 2968 break; 2969 case LCP_OPT_AUTH_PROTO: 2970 /* 2971 * Peer doesn't want to authenticate himself, 2972 * deny unless this is a dialout call, and 2973 * SPPP_AUTHFLAG_NOCALLOUT is set. 2974 */ 2975 if ((sp->pp_flags & PP_CALLIN) == 0 && 2976 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2977 if (debug) 2978 addlog(" [don't insist on auth " 2979 "for callout]"); 2980 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 2981 break; 2982 } 2983 if (debug) 2984 addlog("[access denied]\n"); 2985 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 2986 break; 2987 } 2988 } 2989 if (debug) 2990 addlog("\n"); 2991 end: 2992 return; 2993 } 2994 2995 /* 2996 * Analyze the LCP Configure-NAK option list, and adjust our 2997 * negotiation. 2998 */ 2999 static void 3000 sppp_lcp_confnak(struct sppp *sp, struct lcp_header *h, int len) 3001 { 3002 STDDCL; 3003 u_char *p, l; 3004 uint32_t magic; 3005 3006 KASSERT(SPPP_WLOCKED(sp)); 3007 3008 if (len <= sizeof(*h)) 3009 return; 3010 len -= sizeof(*h); 3011 3012 if (debug) 3013 log(LOG_DEBUG, "%s: lcp nak opts:", 3014 ifp->if_xname); 3015 3016 p = (void *)(h + 1); 3017 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3018 /* Sanity check option length */ 3019 if (l > len) { 3020 /* 3021 * Malicious option - drop immediately. 3022 * XXX Maybe we should just RXJ it? 3023 */ 3024 addlog("%s: received malicious LCP option, " 3025 "dropping.\n", ifp->if_xname); 3026 goto end; 3027 } 3028 if (debug) 3029 addlog(" %s", sppp_lcp_opt_name(*p)); 3030 switch (p[0]) { 3031 case LCP_OPT_MAGIC: 3032 /* Magic number -- renegotiate */ 3033 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC) && 3034 len >= 6 && l == 6) { 3035 magic = (uint32_t)p[2] << 24 | 3036 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 3037 /* 3038 * If the remote magic is our negated one, 3039 * this looks like a loopback problem. 3040 * Suggest a new magic to make sure. 3041 */ 3042 if (magic == ~sp->lcp.magic) { 3043 if (debug) 3044 addlog(" magic glitch"); 3045 sp->lcp.magic = cprng_fast32(); 3046 } else { 3047 sp->lcp.magic = magic; 3048 if (debug) 3049 addlog(" %d", magic); 3050 } 3051 } 3052 break; 3053 case LCP_OPT_MRU: 3054 /* 3055 * Peer wants to advise us to negotiate an MRU. 3056 * Agree on it if it's reasonable, or use 3057 * default otherwise. 3058 */ 3059 if (len >= 4 && l == 4) { 3060 u_int mru = p[2] * 256 + p[3]; 3061 if (debug) 3062 addlog(" %d", mru); 3063 if (mru < PPP_MINMRU || mru > sp->pp_if.if_mtu) 3064 mru = sp->pp_if.if_mtu; 3065 sp->lcp.mru = mru; 3066 SET(sp->lcp.opts, SPPP_LCP_OPT_MRU); 3067 } 3068 break; 3069 case LCP_OPT_AUTH_PROTO: 3070 /* 3071 * Peer doesn't like our authentication method, 3072 * deny. 3073 */ 3074 if (debug) 3075 addlog("[access denied]\n"); 3076 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3077 break; 3078 } 3079 } 3080 if (debug) 3081 addlog("\n"); 3082 end: 3083 return; 3084 } 3085 3086 static void 3087 sppp_lcp_tlu(struct sppp *sp) 3088 { 3089 struct ifnet *ifp = &sp->pp_if; 3090 int i; 3091 3092 KASSERT(SPPP_WLOCKED(sp)); 3093 3094 /* XXX ? */ 3095 if (! (ifp->if_flags & IFF_UP) && 3096 (ifp->if_flags & IFF_RUNNING)) { 3097 /* Coming out of loopback mode. */ 3098 SPPP_UNLOCK(sp); 3099 if_up(ifp); 3100 SPPP_LOCK(sp, RW_WRITER); 3101 } 3102 3103 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO) || 3104 (sp->pp_flags & PP_NEEDAUTH) != 0) 3105 sppp_change_phase(sp, SPPP_PHASE_AUTHENTICATE); 3106 else 3107 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 3108 3109 /* 3110 * Open all authentication protocols. This is even required 3111 * if we already proceeded to network phase, since it might be 3112 * that remote wants us to authenticate, so we might have to 3113 * send a PAP request. Undesired authentication protocols 3114 * don't do anything when they get an Open event. 3115 */ 3116 for (i = 0; i < IDX_COUNT; i++) 3117 if ((cps[i])->flags & CP_AUTH) { 3118 sppp_wq_add(sp->wq_cp, 3119 &sp->scp[(cps[i])->protoidx].work_open); 3120 } 3121 3122 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 3123 /* Notify all NCPs. */ 3124 for (i = 0; i < IDX_COUNT; i++) 3125 if ((cps[i])->flags & CP_NCP) { 3126 sppp_wq_add(sp->wq_cp, 3127 &sp->scp[(cps[i])->protoidx].work_open); 3128 } 3129 } 3130 3131 /* notify low-level driver of state change */ 3132 sppp_notify_chg_wlocked(sp); 3133 } 3134 3135 static void 3136 sppp_lcp_tld(struct sppp *sp) 3137 { 3138 int i, pi, phase; 3139 3140 KASSERT(SPPP_WLOCKED(sp)); 3141 3142 phase = sp->pp_phase; 3143 3144 sppp_change_phase(sp, SPPP_PHASE_TERMINATE); 3145 3146 /* 3147 * Take upper layers down. We send the Down event first and 3148 * the Close second to prevent the upper layers from sending 3149 * ``a flurry of terminate-request packets'', as the RFC 3150 * describes it. 3151 */ 3152 for (i = 0; i < IDX_COUNT; i++) { 3153 pi = (cps[i])->protoidx; 3154 if (((cps[i])->flags & CP_LCP) == 0) { 3155 /* skip if ncp was not started */ 3156 if (phase != SPPP_PHASE_NETWORK && 3157 ((cps[i])->flags & CP_NCP) != 0) 3158 continue; 3159 3160 sppp_wq_add(sp->wq_cp, &sp->scp[pi].work_down); 3161 sppp_wq_add(sp->wq_cp, &sp->scp[pi].work_close); 3162 } 3163 } 3164 } 3165 3166 static void 3167 sppp_lcp_tls(const struct cp *cp __unused, struct sppp *sp) 3168 { 3169 3170 KASSERT(SPPP_WLOCKED(sp)); 3171 3172 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 3173 printf("%s: authentication failed %d times, not retrying again\n", 3174 sp->pp_if.if_xname, sp->pp_auth_failures); 3175 3176 SPPP_UNLOCK(sp); 3177 if_down(&sp->pp_if); 3178 SPPP_LOCK(sp, RW_WRITER); 3179 return; 3180 } 3181 3182 sppp_change_phase(sp, SPPP_PHASE_ESTABLISH); 3183 3184 /* Notify lower layer if desired. */ 3185 sppp_notify_tls_wlocked(sp); 3186 sp->lcp.tlf_sent = false; 3187 } 3188 3189 static void 3190 sppp_lcp_tlf(const struct cp *cp __unused, struct sppp *sp) 3191 { 3192 3193 KASSERT(SPPP_WLOCKED(sp)); 3194 3195 sppp_change_phase(sp, SPPP_PHASE_DEAD); 3196 3197 /* Notify lower layer if desired. */ 3198 sppp_notify_tlf_wlocked(sp); 3199 3200 switch (sp->scp[IDX_LCP].state) { 3201 case STATE_CLOSED: 3202 case STATE_STOPPED: 3203 sp->lcp.tlf_sent = true; 3204 break; 3205 case STATE_INITIAL: 3206 default: 3207 /* just in case */ 3208 sp->lcp.tlf_sent = false; 3209 } 3210 } 3211 3212 static void 3213 sppp_lcp_scr(struct sppp *sp) 3214 { 3215 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 3216 int i = 0; 3217 u_short authproto; 3218 3219 KASSERT(SPPP_WLOCKED(sp)); 3220 3221 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC)) { 3222 if (! sp->lcp.magic) 3223 sp->lcp.magic = cprng_fast32(); 3224 opt[i++] = LCP_OPT_MAGIC; 3225 opt[i++] = 6; 3226 opt[i++] = sp->lcp.magic >> 24; 3227 opt[i++] = sp->lcp.magic >> 16; 3228 opt[i++] = sp->lcp.magic >> 8; 3229 opt[i++] = sp->lcp.magic; 3230 } 3231 3232 if (ISSET(sp->lcp.opts,SPPP_LCP_OPT_MRU)) { 3233 opt[i++] = LCP_OPT_MRU; 3234 opt[i++] = 4; 3235 opt[i++] = sp->lcp.mru >> 8; 3236 opt[i++] = sp->lcp.mru; 3237 } 3238 3239 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO)) { 3240 authproto = sp->hisauth.proto; 3241 opt[i++] = LCP_OPT_AUTH_PROTO; 3242 opt[i++] = authproto == PPP_CHAP? 5: 4; 3243 opt[i++] = authproto >> 8; 3244 opt[i++] = authproto; 3245 if (authproto == PPP_CHAP) 3246 opt[i++] = CHAP_MD5; 3247 } 3248 3249 sp->scp[IDX_LCP].confid = ++sp->scp[IDX_LCP].seq; 3250 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->scp[IDX_LCP].confid, i, &opt); 3251 } 3252 3253 /* 3254 * Check the open NCPs, return true if at least one NCP is open. 3255 */ 3256 3257 static int 3258 sppp_cp_check(struct sppp *sp, u_char cp_flags) 3259 { 3260 int i, mask; 3261 3262 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 3263 if ((sp->lcp.protos & mask) && (cps[i])->flags & cp_flags) 3264 return 1; 3265 return 0; 3266 } 3267 3268 /* 3269 * Re-check the open NCPs and see if we should terminate the link. 3270 * Called by the NCPs during their tlf action handling. 3271 */ 3272 static void 3273 sppp_lcp_check_and_close(struct sppp *sp) 3274 { 3275 3276 KASSERT(SPPP_WLOCKED(sp)); 3277 3278 if (sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 3279 /* don't bother, we are already going down */ 3280 return; 3281 } 3282 3283 if (sp->pp_phase == SPPP_PHASE_AUTHENTICATE && 3284 sppp_cp_check(sp, CP_AUTH)) 3285 return; 3286 3287 if (sp->pp_phase >= SPPP_PHASE_NETWORK && 3288 sppp_cp_check(sp, CP_NCP)) 3289 return; 3290 3291 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3292 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 3293 } 3294 3295 /* 3296 *--------------------------------------------------------------------------* 3297 * * 3298 * The IPCP implementation. * 3299 * * 3300 *--------------------------------------------------------------------------* 3301 */ 3302 3303 static void 3304 sppp_ipcp_init(struct sppp *sp) 3305 { 3306 3307 KASSERT(SPPP_WLOCKED(sp)); 3308 3309 sppp_cp_init(&ipcp, sp); 3310 3311 sp->ipcp.opts = 0; 3312 sp->ipcp.flags = 0; 3313 } 3314 3315 static void 3316 sppp_ipcp_open(struct sppp *sp, void *xcp) 3317 { 3318 STDDCL; 3319 uint32_t myaddr, hisaddr; 3320 3321 KASSERT(SPPP_WLOCKED(sp)); 3322 KASSERT(!cpu_softintr_p()); 3323 3324 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 3325 sp->ipcp.req_myaddr = 0; 3326 sp->ipcp.req_hisaddr = 0; 3327 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 3328 3329 #ifdef INET 3330 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3331 #else 3332 myaddr = hisaddr = 0; 3333 #endif 3334 /* 3335 * If we don't have his address, this probably means our 3336 * interface doesn't want to talk IP at all. (This could 3337 * be the case if somebody wants to speak only IPX, for 3338 * example.) Don't open IPCP in this case. 3339 */ 3340 if (hisaddr == 0) { 3341 /* XXX this message should go away */ 3342 if (debug) 3343 log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n", 3344 ifp->if_xname); 3345 return; 3346 } 3347 3348 if (myaddr == 0) { 3349 /* 3350 * I don't have an assigned address, so i need to 3351 * negotiate my address. 3352 */ 3353 sp->ipcp.flags |= IPCP_MYADDR_DYN; 3354 SET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3355 } 3356 if (hisaddr == 1) { 3357 /* 3358 * XXX - remove this hack! 3359 * remote has no valid address, we need to get one assigned. 3360 */ 3361 sp->ipcp.flags |= IPCP_HISADDR_DYN; 3362 } 3363 3364 if (sp->query_dns & 1) { 3365 SET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3366 } else { 3367 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3368 } 3369 3370 if (sp->query_dns & 2) { 3371 SET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3372 } else { 3373 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3374 } 3375 sppp_open_event(sp, xcp); 3376 } 3377 3378 static void 3379 sppp_ipcp_close(struct sppp *sp, void *xcp) 3380 { 3381 3382 KASSERT(SPPP_WLOCKED(sp)); 3383 KASSERT(!cpu_softintr_p()); 3384 3385 sppp_close_event(sp, xcp); 3386 3387 #ifdef INET 3388 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 3389 /* 3390 * Some address was dynamic, clear it again. 3391 */ 3392 sppp_clear_ip_addrs(sp); 3393 #endif 3394 } 3395 3396 /* 3397 * Analyze a configure request. Return true if it was agreeable, and 3398 * caused action sca, false if it has been rejected or nak'ed, and 3399 * caused action scn. (The return value is used to make the state 3400 * transition decision in the state automaton.) 3401 */ 3402 static enum cp_rcr_type 3403 sppp_ipcp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 3404 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 3405 { 3406 u_char *buf, *r, *p, l, blen; 3407 enum cp_rcr_type type; 3408 struct ifnet *ifp = &sp->pp_if; 3409 int rlen, len, debug = ifp->if_flags & IFF_DEBUG; 3410 uint32_t hisaddr, desiredaddr; 3411 3412 KASSERT(SPPP_WLOCKED(sp)); 3413 3414 type = CP_RCR_NONE; 3415 origlen -= sizeof(*h); 3416 3417 if (origlen < 0) 3418 return CP_RCR_DROP; 3419 3420 /* 3421 * Make sure to allocate a buf that can at least hold a 3422 * conf-nak with an `address' option. We might need it below. 3423 */ 3424 blen = MAX(6, origlen); 3425 3426 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 3427 if (buf == NULL) 3428 return CP_RCR_DROP; 3429 3430 /* pass 1: see if we can recognize them */ 3431 if (debug) 3432 log(LOG_DEBUG, "%s: ipcp parse opts:", 3433 ifp->if_xname); 3434 p = (void *)(h + 1); 3435 r = buf; 3436 rlen = 0; 3437 for (len = origlen; len > 1; len -= l, p += l) { 3438 l = p[1]; 3439 if (l == 0) 3440 break; 3441 3442 /* Sanity check option length */ 3443 if (l > len) { 3444 /* XXX should we just RXJ? */ 3445 addlog("%s: malicious IPCP option received, dropping\n", 3446 ifp->if_xname); 3447 type = CP_RCR_ERR; 3448 goto end; 3449 } 3450 if (debug) 3451 addlog(" %s", sppp_ipcp_opt_name(*p)); 3452 switch (p[0]) { 3453 #ifdef notyet 3454 case IPCP_OPT_COMPRESSION: 3455 if (len >= 6 && l >= 6) { 3456 /* correctly formed compress option */ 3457 continue; 3458 } 3459 if (debug) 3460 addlog(" [invalid]"); 3461 break; 3462 #endif 3463 case IPCP_OPT_ADDRESS: 3464 if (len >= 6 && l == 6) { 3465 /* correctly formed address option */ 3466 continue; 3467 } 3468 if (debug) 3469 addlog(" [invalid]"); 3470 break; 3471 default: 3472 /* Others not supported. */ 3473 if (debug) 3474 addlog(" [rej]"); 3475 break; 3476 } 3477 /* Add the option to rejected list. */ 3478 if (rlen + l > blen) { 3479 if (debug) 3480 addlog(" [overflow]"); 3481 continue; 3482 } 3483 memcpy(r, p, l); 3484 r += l; 3485 rlen += l; 3486 } 3487 3488 if (rlen > 0) { 3489 type = CP_RCR_REJ; 3490 goto end; 3491 } 3492 3493 if (debug) 3494 addlog("\n"); 3495 3496 /* pass 2: parse option values */ 3497 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 3498 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 3499 else 3500 #ifdef INET 3501 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 3502 #else 3503 hisaddr = 0; 3504 #endif 3505 if (debug) 3506 log(LOG_DEBUG, "%s: ipcp parse opt values: ", 3507 ifp->if_xname); 3508 p = (void *)(h + 1); 3509 r = buf; 3510 rlen = 0; 3511 for (len = origlen; len > 1; len -= l, p += l) { 3512 l = p[1]; 3513 if (l == 0) 3514 break; 3515 3516 if (debug) 3517 addlog(" %s", sppp_ipcp_opt_name(*p)); 3518 switch (p[0]) { 3519 #ifdef notyet 3520 case IPCP_OPT_COMPRESSION: 3521 continue; 3522 #endif 3523 case IPCP_OPT_ADDRESS: 3524 desiredaddr = p[2] << 24 | p[3] << 16 | 3525 p[4] << 8 | p[5]; 3526 if (desiredaddr == hisaddr || 3527 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 3528 /* 3529 * Peer's address is same as our value, 3530 * this is agreeable. Gonna conf-ack 3531 * it. 3532 */ 3533 if (debug) 3534 addlog(" %s [ack]", 3535 sppp_dotted_quad(hisaddr)); 3536 /* record that we've seen it already */ 3537 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 3538 sp->ipcp.req_hisaddr = desiredaddr; 3539 hisaddr = desiredaddr; 3540 continue; 3541 } 3542 /* 3543 * The address wasn't agreeable. This is either 3544 * he sent us 0.0.0.0, asking to assign him an 3545 * address, or he send us another address not 3546 * matching our value. Either case, we gonna 3547 * conf-nak it with our value. 3548 */ 3549 if (debug) { 3550 if (desiredaddr == 0) 3551 addlog(" [addr requested]"); 3552 else 3553 addlog(" %s [not agreed]", 3554 sppp_dotted_quad(desiredaddr)); 3555 } 3556 3557 p[2] = hisaddr >> 24; 3558 p[3] = hisaddr >> 16; 3559 p[4] = hisaddr >> 8; 3560 p[5] = hisaddr; 3561 break; 3562 } 3563 if (rlen + l > blen) { 3564 if (debug) 3565 addlog(" [overflow]"); 3566 continue; 3567 } 3568 /* Add the option to nak'ed list. */ 3569 memcpy(r, p, l); 3570 r += l; 3571 rlen += l; 3572 } 3573 3574 if (rlen > 0) { 3575 type = CP_RCR_NAK; 3576 } else { 3577 if ((sp->ipcp.flags & IPCP_HISADDR_SEEN) == 0) { 3578 /* 3579 * If we are about to conf-ack the request, but haven't seen 3580 * his address so far, gonna conf-nak it instead, with the 3581 * `address' option present and our idea of his address being 3582 * filled in there, to request negotiation of both addresses. 3583 * 3584 * XXX This can result in an endless req - nak loop if peer 3585 * doesn't want to send us his address. Q: What should we do 3586 * about it? XXX A: implement the max-failure counter. 3587 */ 3588 buf[0] = IPCP_OPT_ADDRESS; 3589 buf[1] = 6; 3590 buf[2] = hisaddr >> 24; 3591 buf[3] = hisaddr >> 16; 3592 buf[4] = hisaddr >> 8; 3593 buf[5] = hisaddr; 3594 rlen = 6; 3595 if (debug) 3596 addlog(" still need hisaddr"); 3597 type = CP_RCR_NAK; 3598 } else { 3599 type = CP_RCR_ACK; 3600 rlen = origlen; 3601 memcpy(r, h + 1, rlen); 3602 } 3603 } 3604 3605 end: 3606 if (debug) 3607 addlog("\n"); 3608 3609 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 3610 if (buf != NULL) 3611 kmem_intr_free(buf, blen); 3612 } else { 3613 *msgbuf = buf; 3614 *buflen = blen; 3615 *msglen = rlen; 3616 } 3617 3618 return type; 3619 } 3620 3621 /* 3622 * Analyze the IPCP Configure-Reject option list, and adjust our 3623 * negotiation. 3624 */ 3625 static void 3626 sppp_ipcp_confrej(struct sppp *sp, struct lcp_header *h, int len) 3627 { 3628 u_char *p, l; 3629 struct ifnet *ifp = &sp->pp_if; 3630 int debug = ifp->if_flags & IFF_DEBUG; 3631 3632 KASSERT(SPPP_WLOCKED(sp)); 3633 3634 if (len <= sizeof(*h)) 3635 return; 3636 3637 len -= sizeof(*h); 3638 3639 if (debug) 3640 log(LOG_DEBUG, "%s: ipcp rej opts:", 3641 ifp->if_xname); 3642 3643 p = (void *)(h + 1); 3644 for (; len > 1; len -= l, p += l) { 3645 l = p[1]; 3646 if (l == 0) 3647 break; 3648 3649 /* Sanity check option length */ 3650 if (l > len) { 3651 /* XXX should we just RXJ? */ 3652 addlog("%s: malicious IPCP option received, dropping\n", 3653 ifp->if_xname); 3654 goto end; 3655 } 3656 if (debug) 3657 addlog(" %s", sppp_ipcp_opt_name(*p)); 3658 switch (p[0]) { 3659 case IPCP_OPT_ADDRESS: 3660 /* 3661 * Peer doesn't grok address option. This is 3662 * bad. XXX Should we better give up here? 3663 */ 3664 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3665 break; 3666 #ifdef notyet 3667 case IPCP_OPT_COMPRESS: 3668 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_COMPRESS); 3669 break; 3670 #endif 3671 case IPCP_OPT_PRIMDNS: 3672 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3673 break; 3674 3675 case IPCP_OPT_SECDNS: 3676 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3677 break; 3678 } 3679 } 3680 if (debug) 3681 addlog("\n"); 3682 end: 3683 return; 3684 } 3685 3686 /* 3687 * Analyze the IPCP Configure-NAK option list, and adjust our 3688 * negotiation. 3689 */ 3690 static void 3691 sppp_ipcp_confnak(struct sppp *sp, struct lcp_header *h, int len) 3692 { 3693 u_char *p, l; 3694 struct ifnet *ifp = &sp->pp_if; 3695 int debug = ifp->if_flags & IFF_DEBUG; 3696 uint32_t wantaddr; 3697 3698 KASSERT(SPPP_WLOCKED(sp)); 3699 3700 len -= sizeof(*h); 3701 3702 if (debug) 3703 log(LOG_DEBUG, "%s: ipcp nak opts:", 3704 ifp->if_xname); 3705 3706 p = (void *)(h + 1); 3707 for (; len > 1; len -= l, p += l) { 3708 l = p[1]; 3709 if (l == 0) 3710 break; 3711 3712 /* Sanity check option length */ 3713 if (l > len) { 3714 /* XXX should we just RXJ? */ 3715 addlog("%s: malicious IPCP option received, dropping\n", 3716 ifp->if_xname); 3717 return; 3718 } 3719 if (debug) 3720 addlog(" %s", sppp_ipcp_opt_name(*p)); 3721 switch (*p) { 3722 case IPCP_OPT_ADDRESS: 3723 /* 3724 * Peer doesn't like our local IP address. See 3725 * if we can do something for him. We'll drop 3726 * him our address then. 3727 */ 3728 if (len >= 6 && l == 6) { 3729 wantaddr = p[2] << 24 | p[3] << 16 | 3730 p[4] << 8 | p[5]; 3731 SET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3732 if (debug) 3733 addlog(" [wantaddr %s]", 3734 sppp_dotted_quad(wantaddr)); 3735 /* 3736 * When doing dynamic address assignment, 3737 * we accept his offer. Otherwise, we 3738 * ignore it and thus continue to negotiate 3739 * our already existing value. 3740 */ 3741 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3742 if (debug) 3743 addlog(" [agree]"); 3744 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3745 sp->ipcp.req_myaddr = wantaddr; 3746 } 3747 } 3748 break; 3749 3750 case IPCP_OPT_PRIMDNS: 3751 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS) && 3752 len >= 6 && l == 6) { 3753 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3754 p[4] << 8 | p[5]; 3755 } 3756 break; 3757 3758 case IPCP_OPT_SECDNS: 3759 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS) && 3760 len >= 6 && l == 6) { 3761 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3762 p[4] << 8 | p[5]; 3763 } 3764 break; 3765 #ifdef notyet 3766 case IPCP_OPT_COMPRESS: 3767 /* 3768 * Peer wants different compression parameters. 3769 */ 3770 break; 3771 #endif 3772 } 3773 } 3774 if (debug) 3775 addlog("\n"); 3776 } 3777 3778 static void 3779 sppp_ipcp_tlu(struct sppp *sp) 3780 { 3781 #ifdef INET 3782 KASSERT(SPPP_WLOCKED(sp)); 3783 /* we are up. Set addresses and notify anyone interested */ 3784 sppp_set_ip_addrs(sp); 3785 #endif 3786 } 3787 3788 static void 3789 sppp_ipcp_scr(struct sppp *sp) 3790 { 3791 uint8_t opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3792 #ifdef INET 3793 uint32_t ouraddr; 3794 #endif 3795 int i = 0; 3796 3797 KASSERT(SPPP_WLOCKED(sp)); 3798 3799 #ifdef notyet 3800 if (ISSET(sp->ipcp.opts,SPPP_IPCP_OPT_COMPRESSION)) { 3801 opt[i++] = IPCP_OPT_COMPRESSION; 3802 opt[i++] = 6; 3803 opt[i++] = 0; /* VJ header compression */ 3804 opt[i++] = 0x2d; /* VJ header compression */ 3805 opt[i++] = max_slot_id; 3806 opt[i++] = comp_slot_id; 3807 } 3808 #endif 3809 3810 #ifdef INET 3811 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS)) { 3812 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3813 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3814 else 3815 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3816 opt[i++] = IPCP_OPT_ADDRESS; 3817 opt[i++] = 6; 3818 opt[i++] = ouraddr >> 24; 3819 opt[i++] = ouraddr >> 16; 3820 opt[i++] = ouraddr >> 8; 3821 opt[i++] = ouraddr; 3822 } 3823 #endif 3824 3825 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS)) { 3826 opt[i++] = IPCP_OPT_PRIMDNS; 3827 opt[i++] = 6; 3828 opt[i++] = sp->dns_addrs[0] >> 24; 3829 opt[i++] = sp->dns_addrs[0] >> 16; 3830 opt[i++] = sp->dns_addrs[0] >> 8; 3831 opt[i++] = sp->dns_addrs[0]; 3832 } 3833 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS)) { 3834 opt[i++] = IPCP_OPT_SECDNS; 3835 opt[i++] = 6; 3836 opt[i++] = sp->dns_addrs[1] >> 24; 3837 opt[i++] = sp->dns_addrs[1] >> 16; 3838 opt[i++] = sp->dns_addrs[1] >> 8; 3839 opt[i++] = sp->dns_addrs[1]; 3840 } 3841 3842 sp->scp[IDX_IPCP].confid = ++sp->scp[IDX_IPCP].seq; 3843 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->scp[IDX_IPCP].confid, i, &opt); 3844 } 3845 3846 /* 3847 *--------------------------------------------------------------------------* 3848 * * 3849 * The IPv6CP implementation. * 3850 * * 3851 *--------------------------------------------------------------------------* 3852 */ 3853 3854 #ifdef INET6 3855 static void 3856 sppp_ipv6cp_init(struct sppp *sp) 3857 { 3858 3859 KASSERT(SPPP_WLOCKED(sp)); 3860 3861 sppp_cp_init(&ipv6cp, sp); 3862 3863 sp->ipv6cp.opts = 0; 3864 sp->ipv6cp.flags = 0; 3865 } 3866 3867 static void 3868 sppp_ipv6cp_open(struct sppp *sp, void *xcp) 3869 { 3870 STDDCL; 3871 struct in6_addr myaddr, hisaddr; 3872 3873 KASSERT(SPPP_WLOCKED(sp)); 3874 KASSERT(!cpu_softintr_p()); 3875 3876 #ifdef IPV6CP_MYIFID_DYN 3877 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3878 #else 3879 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3880 #endif 3881 3882 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3883 /* 3884 * If we don't have our address, this probably means our 3885 * interface doesn't want to talk IPv6 at all. (This could 3886 * be the case if somebody wants to speak only IPX, for 3887 * example.) Don't open IPv6CP in this case. 3888 */ 3889 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3890 /* XXX this message should go away */ 3891 if (debug) 3892 log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n", 3893 ifp->if_xname); 3894 return; 3895 } 3896 3897 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3898 SET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 3899 sppp_open_event(sp, xcp); 3900 } 3901 3902 /* 3903 * Analyze a configure request. Return true if it was agreeable, and 3904 * caused action sca, false if it has been rejected or nak'ed, and 3905 * caused action scn. (The return value is used to make the state 3906 * transition decision in the state automaton.) 3907 */ 3908 static enum cp_rcr_type 3909 sppp_ipv6cp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 3910 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 3911 { 3912 u_char *buf, *r, *p, l, blen; 3913 struct ifnet *ifp = &sp->pp_if; 3914 int rlen, len, debug = ifp->if_flags & IFF_DEBUG; 3915 struct in6_addr myaddr, desiredaddr, suggestaddr; 3916 enum cp_rcr_type type; 3917 int ifidcount; 3918 int collision, nohisaddr; 3919 char ip6buf[INET6_ADDRSTRLEN]; 3920 3921 KASSERT(SPPP_WLOCKED(sp)); 3922 3923 type = CP_RCR_NONE; 3924 origlen -= sizeof(*h); 3925 3926 if (origlen < 0) 3927 return CP_RCR_DROP; 3928 3929 /* 3930 * Make sure to allocate a buf that can at least hold a 3931 * conf-nak with an `address' option. We might need it below. 3932 */ 3933 blen = MAX(6, origlen); 3934 3935 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 3936 if (buf == NULL) 3937 return CP_RCR_DROP; 3938 3939 /* pass 1: see if we can recognize them */ 3940 if (debug) 3941 log(LOG_DEBUG, "%s: ipv6cp parse opts:", 3942 ifp->if_xname); 3943 p = (void *)(h + 1); 3944 r = buf; 3945 rlen = 0; 3946 ifidcount = 0; 3947 for (len = origlen; len > 1; len -= l, p += l) { 3948 l = p[1]; 3949 if (l == 0) 3950 break; 3951 3952 /* Sanity check option length */ 3953 if (l > len) { 3954 /* XXX just RXJ? */ 3955 addlog("%s: received malicious IPCPv6 option, " 3956 "dropping\n", ifp->if_xname); 3957 type = CP_RCR_ERR; 3958 goto end; 3959 } 3960 if (debug) 3961 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3962 switch (p[0]) { 3963 case IPV6CP_OPT_IFID: 3964 if (len >= 10 && l == 10 && ifidcount == 0) { 3965 /* correctly formed address option */ 3966 ifidcount++; 3967 continue; 3968 } 3969 if (debug) 3970 addlog(" [invalid]"); 3971 break; 3972 #ifdef notyet 3973 case IPV6CP_OPT_COMPRESSION: 3974 if (len >= 4 && l >= 4) { 3975 /* correctly formed compress option */ 3976 continue; 3977 } 3978 if (debug) 3979 addlog(" [invalid]"); 3980 break; 3981 #endif 3982 default: 3983 /* Others not supported. */ 3984 if (debug) 3985 addlog(" [rej]"); 3986 break; 3987 } 3988 if (rlen + l > blen) { 3989 if (debug) 3990 addlog(" [overflow]"); 3991 continue; 3992 } 3993 /* Add the option to rejected list. */ 3994 memcpy(r, p, l); 3995 r += l; 3996 rlen += l; 3997 } 3998 3999 if (rlen > 0) { 4000 type = CP_RCR_REJ; 4001 goto end; 4002 } 4003 4004 if (debug) 4005 addlog("\n"); 4006 4007 /* pass 2: parse option values */ 4008 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4009 if (debug) 4010 log(LOG_DEBUG, "%s: ipv6cp parse opt values: ", 4011 ifp->if_xname); 4012 p = (void *)(h + 1); 4013 r = buf; 4014 rlen = 0; 4015 type = CP_RCR_ACK; 4016 for (len = origlen; len > 1; len -= l, p += l) { 4017 l = p[1]; 4018 if (l == 0) 4019 break; 4020 4021 if (debug) 4022 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4023 switch (p[0]) { 4024 #ifdef notyet 4025 case IPV6CP_OPT_COMPRESSION: 4026 continue; 4027 #endif 4028 case IPV6CP_OPT_IFID: 4029 memset(&desiredaddr, 0, sizeof(desiredaddr)); 4030 memcpy(&desiredaddr.s6_addr[8], &p[2], 8); 4031 collision = (memcmp(&desiredaddr.s6_addr[8], 4032 &myaddr.s6_addr[8], 8) == 0); 4033 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 4034 4035 desiredaddr.s6_addr16[0] = htons(0xfe80); 4036 (void)in6_setscope(&desiredaddr, &sp->pp_if, NULL); 4037 4038 if (!collision && !nohisaddr) { 4039 /* no collision, hisaddr known - Conf-Ack */ 4040 type = CP_RCR_ACK; 4041 memcpy(sp->ipv6cp.my_ifid, &myaddr.s6_addr[8], 4042 sizeof(sp->ipv6cp.my_ifid)); 4043 memcpy(sp->ipv6cp.his_ifid, 4044 &desiredaddr.s6_addr[8], 4045 sizeof(sp->ipv6cp.my_ifid)); 4046 4047 if (debug) { 4048 addlog(" %s [%s]", 4049 IN6_PRINT(ip6buf, &desiredaddr), 4050 sppp_cp_type_name(CONF_ACK)); 4051 } 4052 continue; 4053 } 4054 4055 memset(&suggestaddr, 0, sizeof(suggestaddr)); 4056 if (collision && nohisaddr) { 4057 /* collision, hisaddr unknown - Conf-Rej */ 4058 type = CP_RCR_REJ; 4059 memset(&p[2], 0, 8); 4060 } else { 4061 /* 4062 * - no collision, hisaddr unknown, or 4063 * - collision, hisaddr known 4064 * Conf-Nak, suggest hisaddr 4065 */ 4066 type = CP_RCR_NAK; 4067 sppp_suggest_ip6_addr(sp, &suggestaddr); 4068 memcpy(&p[2], &suggestaddr.s6_addr[8], 8); 4069 } 4070 if (debug) { 4071 int ctype = type == CP_RCR_REJ ? CONF_REJ : CONF_NAK; 4072 addlog(" %s [%s]", IN6_PRINT(ip6buf, &desiredaddr), 4073 sppp_cp_type_name(ctype)); 4074 } 4075 break; 4076 } 4077 if (rlen + l > blen) { 4078 if (debug) 4079 addlog(" [overflow]"); 4080 continue; 4081 } 4082 /* Add the option to nak'ed list. */ 4083 memcpy(r, p, l); 4084 r += l; 4085 rlen += l; 4086 } 4087 4088 if (rlen > 0) { 4089 if (type != CP_RCR_ACK) { 4090 if (debug) { 4091 int ctype ; 4092 ctype = type == CP_RCR_REJ ? 4093 CONF_REJ : CONF_NAK; 4094 addlog(" send %s suggest %s\n", 4095 sppp_cp_type_name(ctype), 4096 IN6_PRINT(ip6buf, &suggestaddr)); 4097 } 4098 } 4099 #ifdef notdef 4100 if (type == CP_RCR_ACK) 4101 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 4102 #endif 4103 } else { 4104 if (type == CP_RCR_ACK) { 4105 rlen = origlen; 4106 memcpy(r, h + 1, rlen); 4107 } 4108 } 4109 end: 4110 if (debug) 4111 addlog("\n"); 4112 4113 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 4114 if (buf != NULL) 4115 kmem_intr_free(buf, blen); 4116 } else { 4117 *msgbuf = buf; 4118 *buflen = blen; 4119 *msglen = rlen; 4120 } 4121 4122 return type; 4123 } 4124 4125 /* 4126 * Analyze the IPv6CP Configure-Reject option list, and adjust our 4127 * negotiation. 4128 */ 4129 static void 4130 sppp_ipv6cp_confrej(struct sppp *sp, struct lcp_header *h, int len) 4131 { 4132 u_char *p, l; 4133 struct ifnet *ifp = &sp->pp_if; 4134 int debug = ifp->if_flags & IFF_DEBUG; 4135 4136 KASSERT(SPPP_WLOCKED(sp)); 4137 4138 if (len <= sizeof(*h)) 4139 return; 4140 4141 len -= sizeof(*h); 4142 4143 if (debug) 4144 log(LOG_DEBUG, "%s: ipv6cp rej opts:", 4145 ifp->if_xname); 4146 4147 p = (void *)(h + 1); 4148 for (; len > 1; len -= l, p += l) { 4149 l = p[1]; 4150 if (l == 0) 4151 break; 4152 4153 if (l > len) { 4154 /* XXX just RXJ? */ 4155 addlog("%s: received malicious IPCPv6 option, " 4156 "dropping\n", ifp->if_xname); 4157 goto end; 4158 } 4159 if (debug) 4160 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4161 switch (p[0]) { 4162 case IPV6CP_OPT_IFID: 4163 /* 4164 * Peer doesn't grok address option. This is 4165 * bad. XXX Should we better give up here? 4166 */ 4167 CLR(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 4168 break; 4169 #ifdef notyet 4170 case IPV6CP_OPT_COMPRESS: 4171 CLR(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_COMPRESS); 4172 break; 4173 #endif 4174 } 4175 } 4176 if (debug) 4177 addlog("\n"); 4178 end: 4179 return; 4180 } 4181 4182 /* 4183 * Analyze the IPv6CP Configure-NAK option list, and adjust our 4184 * negotiation. 4185 */ 4186 static void 4187 sppp_ipv6cp_confnak(struct sppp *sp, struct lcp_header *h, int len) 4188 { 4189 u_char *p, l; 4190 struct ifnet *ifp = &sp->pp_if; 4191 int debug = ifp->if_flags & IFF_DEBUG; 4192 struct in6_addr suggestaddr; 4193 char ip6buf[INET6_ADDRSTRLEN]; 4194 4195 KASSERT(SPPP_WLOCKED(sp)); 4196 4197 if (len <= sizeof(*h)) 4198 return; 4199 4200 len -= sizeof(*h); 4201 4202 if (debug) 4203 log(LOG_DEBUG, "%s: ipv6cp nak opts:", 4204 ifp->if_xname); 4205 4206 p = (void *)(h + 1); 4207 for (; len > 1; len -= l, p += l) { 4208 l = p[1]; 4209 if (l == 0) 4210 break; 4211 4212 if (l > len) { 4213 /* XXX just RXJ? */ 4214 addlog("%s: received malicious IPCPv6 option, " 4215 "dropping\n", ifp->if_xname); 4216 goto end; 4217 } 4218 if (debug) 4219 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4220 switch (p[0]) { 4221 case IPV6CP_OPT_IFID: 4222 /* 4223 * Peer doesn't like our local ifid. See 4224 * if we can do something for him. We'll drop 4225 * him our address then. 4226 */ 4227 if (len < 10 || l != 10) 4228 break; 4229 memset(&suggestaddr, 0, sizeof(suggestaddr)); 4230 suggestaddr.s6_addr16[0] = htons(0xfe80); 4231 (void)in6_setscope(&suggestaddr, &sp->pp_if, NULL); 4232 memcpy(&suggestaddr.s6_addr[8], &p[2], 8); 4233 4234 SET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 4235 if (debug) 4236 addlog(" [suggestaddr %s]", 4237 IN6_PRINT(ip6buf, &suggestaddr)); 4238 #ifdef IPV6CP_MYIFID_DYN 4239 /* 4240 * When doing dynamic address assignment, 4241 * we accept his offer. 4242 */ 4243 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 4244 struct in6_addr lastsuggest; 4245 /* 4246 * If <suggested myaddr from peer> equals to 4247 * <hisaddr we have suggested last time>, 4248 * we have a collision. generate new random 4249 * ifid. 4250 */ 4251 sppp_suggest_ip6_addr(&lastsuggest); 4252 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 4253 lastsuggest)) { 4254 if (debug) 4255 addlog(" [random]"); 4256 sppp_gen_ip6_addr(sp, &suggestaddr); 4257 } 4258 sppp_set_ip6_addr(sp, &suggestaddr, 0); 4259 if (debug) 4260 addlog(" [agree]"); 4261 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 4262 } 4263 #else 4264 /* 4265 * Since we do not do dynamic address assignment, 4266 * we ignore it and thus continue to negotiate 4267 * our already existing value. This can possibly 4268 * go into infinite request-reject loop. 4269 * 4270 * This is not likely because we normally use 4271 * ifid based on MAC-address. 4272 * If you have no ethernet card on the node, too bad. 4273 * XXX should we use fail_counter? 4274 */ 4275 #endif 4276 break; 4277 #ifdef notyet 4278 case IPV6CP_OPT_COMPRESS: 4279 /* 4280 * Peer wants different compression parameters. 4281 */ 4282 break; 4283 #endif 4284 } 4285 } 4286 if (debug) 4287 addlog("\n"); 4288 end: 4289 return; 4290 } 4291 4292 static void 4293 sppp_ipv6cp_tlu(struct sppp *sp) 4294 { 4295 4296 KASSERT(SPPP_WLOCKED(sp)); 4297 /* we are up - notify isdn daemon */ 4298 sppp_notify_con_wlocked(sp); 4299 } 4300 4301 static void 4302 sppp_ipv6cp_scr(struct sppp *sp) 4303 { 4304 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 4305 struct in6_addr ouraddr; 4306 int i = 0; 4307 4308 KASSERT(SPPP_WLOCKED(sp)); 4309 4310 if (ISSET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID)) { 4311 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 4312 opt[i++] = IPV6CP_OPT_IFID; 4313 opt[i++] = 10; 4314 memcpy(&opt[i], &ouraddr.s6_addr[8], 8); 4315 i += 8; 4316 } 4317 4318 #ifdef notyet 4319 if (ISSET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_COMPRESSION)) { 4320 opt[i++] = IPV6CP_OPT_COMPRESSION; 4321 opt[i++] = 4; 4322 opt[i++] = 0; /* TBD */ 4323 opt[i++] = 0; /* TBD */ 4324 /* variable length data may follow */ 4325 } 4326 #endif 4327 4328 sp->scp[IDX_IPV6CP].confid = ++sp->scp[IDX_IPV6CP].seq; 4329 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->scp[IDX_IPV6CP].confid, i, &opt); 4330 } 4331 #else /*INET6*/ 4332 static void 4333 sppp_ipv6cp_init(struct sppp *sp) 4334 { 4335 4336 KASSERT(SPPP_WLOCKED(sp)); 4337 } 4338 4339 static void 4340 sppp_ipv6cp_open(struct sppp *sp, void *xcp) 4341 { 4342 4343 KASSERT(SPPP_WLOCKED(sp)); 4344 } 4345 4346 static enum cp_rcr_type 4347 sppp_ipv6cp_confreq(struct sppp *sp, struct lcp_header *h, 4348 int len, uint8_t **msgbuf, size_t *buflen, size_t *msglen) 4349 { 4350 4351 KASSERT(SPPP_WLOCKED(sp)); 4352 return 0; 4353 } 4354 4355 static void 4356 sppp_ipv6cp_confrej(struct sppp *sp, struct lcp_header *h, 4357 int len) 4358 { 4359 4360 KASSERT(SPPP_WLOCKED(sp)); 4361 } 4362 4363 static void 4364 sppp_ipv6cp_confnak(struct sppp *sp, struct lcp_header *h, 4365 int len) 4366 { 4367 4368 KASSERT(SPPP_WLOCKED(sp)); 4369 } 4370 4371 static void 4372 sppp_ipv6cp_tlu(struct sppp *sp) 4373 { 4374 4375 KASSERT(SPPP_WLOCKED(sp)); 4376 } 4377 4378 static void 4379 sppp_ipv6cp_scr(struct sppp *sp) 4380 { 4381 4382 KASSERT(SPPP_WLOCKED(sp)); 4383 } 4384 #endif /*INET6*/ 4385 4386 /* 4387 *--------------------------------------------------------------------------* 4388 * * 4389 * The CHAP implementation. * 4390 * * 4391 *--------------------------------------------------------------------------* 4392 */ 4393 /* 4394 * The authentication protocols is implemented on the state machine for 4395 * control protocols. And it uses following actions and events. 4396 * 4397 * Actions: 4398 * - scr: send CHAP_CHALLENGE and CHAP_RESPONSE 4399 * - sca: send CHAP_SUCCESS 4400 * - scn: send CHAP_FAILURE and shutdown lcp 4401 * Events: 4402 * - RCR+: receive CHAP_RESPONSE containing correct digest 4403 * - RCR-: receive CHAP_RESPONSE containing wrong digest 4404 * - RCA: receive CHAP_SUCCESS 4405 * - RCN: (this event is unused) 4406 * - TO+: re-send CHAP_CHALLENGE and CHAP_RESPONSE 4407 * - TO-: this layer finish 4408 */ 4409 4410 /* 4411 * Handle incoming CHAP packets. 4412 */ 4413 void 4414 sppp_chap_input(struct sppp *sp, struct mbuf *m) 4415 { 4416 STDDCL; 4417 struct lcp_header *h; 4418 int len, x; 4419 u_char *value, *name, digest[sizeof(sp->chap.challenge)]; 4420 int value_len, name_len; 4421 MD5_CTX ctx; 4422 4423 len = m->m_pkthdr.len; 4424 if (len < 4) { 4425 if (debug) 4426 log(LOG_DEBUG, 4427 "%s: chap invalid packet length: %d bytes\n", 4428 ifp->if_xname, len); 4429 return; 4430 } 4431 h = mtod(m, struct lcp_header *); 4432 if (len > ntohs(h->len)) 4433 len = ntohs(h->len); 4434 4435 SPPP_LOCK(sp, RW_WRITER); 4436 4437 switch (h->type) { 4438 /* challenge, failure and success are his authproto */ 4439 case CHAP_CHALLENGE: 4440 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4441 /* can't do anything useful */ 4442 sp->pp_auth_failures++; 4443 printf("%s: chap input without my name and my secret being set\n", 4444 ifp->if_xname); 4445 break; 4446 } 4447 value = 1 + (u_char *)(h + 1); 4448 value_len = value[-1]; 4449 name = value + value_len; 4450 name_len = len - value_len - 5; 4451 if (name_len < 0) { 4452 if (debug) { 4453 log(LOG_DEBUG, 4454 "%s: chap corrupted challenge " 4455 "<%s id=0x%x len=%d", 4456 ifp->if_xname, 4457 sppp_auth_type_name(PPP_CHAP, h->type), 4458 h->ident, ntohs(h->len)); 4459 if (len > 4) 4460 sppp_print_bytes((u_char *)(h + 1), 4461 len - 4); 4462 addlog(">\n"); 4463 } 4464 break; 4465 } 4466 4467 if (debug) { 4468 log(LOG_DEBUG, 4469 "%s: chap input <%s id=0x%x len=%d name=", 4470 ifp->if_xname, 4471 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 4472 ntohs(h->len)); 4473 sppp_print_string((char *) name, name_len); 4474 addlog(" value-size=%d value=", value_len); 4475 sppp_print_bytes(value, value_len); 4476 addlog(">\n"); 4477 } 4478 4479 /* Compute reply value. */ 4480 MD5Init(&ctx); 4481 MD5Update(&ctx, &h->ident, 1); 4482 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 4483 MD5Update(&ctx, value, value_len); 4484 MD5Final(sp->chap.digest, &ctx); 4485 sp->chap.digest_len = sizeof(sp->chap.digest); 4486 sp->scp[IDX_CHAP].rconfid = h->ident; 4487 4488 sppp_wq_add(sp->wq_cp, &sp->chap.work_challenge_rcvd); 4489 break; 4490 4491 case CHAP_SUCCESS: 4492 if (debug) { 4493 log(LOG_DEBUG, "%s: chap success", 4494 ifp->if_xname); 4495 if (len > 4) { 4496 addlog(": "); 4497 sppp_print_string((char *)(h + 1), len - 4); 4498 } 4499 addlog("\n"); 4500 } 4501 4502 if (h->ident != sp->scp[IDX_CHAP].rconfid) { 4503 if (debug) { 4504 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4505 ifp->if_xname, chap.name, 4506 h->ident, sp->scp[IDX_CHAP].rconfid); 4507 } 4508 if_statinc(ifp, if_ierrors); 4509 break; 4510 } 4511 4512 if (sp->chap.digest_len == 0) { 4513 if (debug) { 4514 log(LOG_DEBUG, 4515 "%s: receive CHAP success without challenge\n", 4516 ifp->if_xname); 4517 } 4518 if_statinc(ifp, if_ierrors); 4519 break; 4520 } 4521 4522 x = splnet(); 4523 sp->pp_auth_failures = 0; 4524 sp->pp_flags &= ~PP_NEEDAUTH; 4525 splx(x); 4526 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4527 sp->chap.digest_len = 0; 4528 4529 if (!ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_SERV)) { 4530 /* 4531 * we are not authenticator for CHAP, 4532 * generate a dummy RCR+ event without CHAP_RESPONSE 4533 */ 4534 sp->scp[IDX_CHAP].rcr_type = CP_RCR_ACK; 4535 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4536 } 4537 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rca); 4538 break; 4539 4540 case CHAP_FAILURE: 4541 if (h->ident != sp->scp[IDX_CHAP].rconfid) { 4542 if (debug) { 4543 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4544 ifp->if_xname, chap.name, 4545 h->ident, sp->scp[IDX_CHAP].rconfid); 4546 } 4547 if_statinc(ifp, if_ierrors); 4548 break; 4549 } 4550 4551 if (sp->chap.digest_len == 0) { 4552 if (debug) { 4553 log(LOG_DEBUG, 4554 "%s: receive CHAP failure without challenge\n", 4555 ifp->if_xname); 4556 } 4557 if_statinc(ifp, if_ierrors); 4558 break; 4559 } 4560 4561 x = splnet(); 4562 sp->pp_auth_failures++; 4563 splx(x); 4564 if (debug) { 4565 log(LOG_INFO, "%s: chap failure", 4566 ifp->if_xname); 4567 if (len > 4) { 4568 addlog(": "); 4569 sppp_print_string((char *)(h + 1), len - 4); 4570 } 4571 addlog("\n"); 4572 } else 4573 log(LOG_INFO, "%s: chap failure\n", 4574 ifp->if_xname); 4575 4576 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4577 sp->chap.digest_len = 0; 4578 /* 4579 * await LCP shutdown by authenticator, 4580 * so we don't have to enqueue sc->scp[IDX_CHAP].work_rcn 4581 */ 4582 break; 4583 4584 /* response is my authproto */ 4585 case CHAP_RESPONSE: 4586 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4587 /* can't do anything useful */ 4588 printf("%s: chap response" 4589 " without his name and his secret being set\n", 4590 ifp->if_xname); 4591 break; 4592 } 4593 value = 1 + (u_char *)(h + 1); 4594 value_len = value[-1]; 4595 name = value + value_len; 4596 name_len = len - value_len - 5; 4597 if (name_len < 0) { 4598 if (debug) { 4599 log(LOG_DEBUG, 4600 "%s: chap corrupted response " 4601 "<%s id=0x%x len=%d", 4602 ifp->if_xname, 4603 sppp_auth_type_name(PPP_CHAP, h->type), 4604 h->ident, ntohs(h->len)); 4605 if (len > 4) 4606 sppp_print_bytes((u_char *)(h + 1), 4607 len - 4); 4608 addlog(">\n"); 4609 } 4610 break; 4611 } 4612 if (h->ident != sp->scp[IDX_CHAP].confid) { 4613 if (debug) 4614 log(LOG_DEBUG, 4615 "%s: chap dropping response for old ID " 4616 "(got %d, expected %d)\n", 4617 ifp->if_xname, 4618 h->ident, sp->scp[IDX_CHAP].confid); 4619 break; 4620 } else { 4621 sp->scp[IDX_CHAP].rconfid = h->ident; 4622 } 4623 4624 if (sp->hisauth.name != NULL && 4625 (name_len != sp->hisauth.name_len 4626 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 4627 log(LOG_INFO, "%s: chap response, his name ", 4628 ifp->if_xname); 4629 sppp_print_string(name, name_len); 4630 addlog(" != expected "); 4631 sppp_print_string(sp->hisauth.name, 4632 sp->hisauth.name_len); 4633 addlog("\n"); 4634 4635 /* generate RCR- event */ 4636 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4637 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4638 break; 4639 } 4640 4641 if (debug) { 4642 log(LOG_DEBUG, "%s: chap input(%s) " 4643 "<%s id=0x%x len=%d name=", 4644 ifp->if_xname, 4645 sppp_state_name(sp->scp[IDX_CHAP].state), 4646 sppp_auth_type_name(PPP_CHAP, h->type), 4647 h->ident, ntohs(h->len)); 4648 sppp_print_string((char *)name, name_len); 4649 addlog(" value-size=%d value=", value_len); 4650 sppp_print_bytes(value, value_len); 4651 addlog(">\n"); 4652 } 4653 4654 if (value_len == sizeof(sp->chap.challenge) && 4655 value_len == sizeof(sp->chap.digest)) { 4656 MD5Init(&ctx); 4657 MD5Update(&ctx, &h->ident, 1); 4658 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 4659 MD5Update(&ctx, sp->chap.challenge, sizeof(sp->chap.challenge)); 4660 MD5Final(digest, &ctx); 4661 4662 if (memcmp(digest, value, value_len) == 0) { 4663 sp->scp[IDX_CHAP].rcr_type = CP_RCR_ACK; 4664 if (!ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_PEER) || 4665 sp->chap.rechallenging) { 4666 /* generate a dummy RCA event*/ 4667 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rca); 4668 } 4669 } else { 4670 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4671 } 4672 } else { 4673 if (debug) 4674 log(LOG_DEBUG, 4675 "%s: chap bad hash value length: " 4676 "%d bytes, should be %zu\n", 4677 ifp->if_xname, value_len, 4678 sizeof(sp->chap.challenge)); 4679 4680 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4681 } 4682 4683 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4684 break; 4685 4686 default: 4687 /* Unknown CHAP packet type -- ignore. */ 4688 if (debug) { 4689 log(LOG_DEBUG, "%s: chap unknown input(%s) " 4690 "<0x%x id=0x%xh len=%d", 4691 ifp->if_xname, 4692 sppp_state_name(sp->scp[IDX_CHAP].state), 4693 h->type, h->ident, ntohs(h->len)); 4694 if (len > 4) 4695 sppp_print_bytes((u_char *)(h + 1), len - 4); 4696 addlog(">\n"); 4697 } 4698 break; 4699 4700 } 4701 4702 SPPP_UNLOCK(sp); 4703 } 4704 4705 static void 4706 sppp_chap_init(struct sppp *sp) 4707 { 4708 4709 KASSERT(SPPP_WLOCKED(sp)); 4710 4711 sppp_cp_init(&chap, sp); 4712 4713 SPPP_WQ_SET(&sp->chap.work_challenge_rcvd, 4714 sppp_chap_rcv_challenge_event, &chap); 4715 } 4716 4717 static void 4718 sppp_chap_open(struct sppp *sp, void *xcp) 4719 { 4720 4721 KASSERT(SPPP_WLOCKED(sp)); 4722 4723 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4724 sp->chap.digest_len = 0; 4725 sp->chap.rechallenging = false; 4726 sp->chap.response_rcvd = false; 4727 sppp_open_event(sp, xcp); 4728 } 4729 4730 static void 4731 sppp_chap_tlu(struct sppp *sp) 4732 { 4733 STDDCL; 4734 int i, x; 4735 4736 KASSERT(SPPP_WLOCKED(sp)); 4737 4738 i = 0; 4739 sp->scp[IDX_CHAP].rst_counter = sp->lcp.max_configure; 4740 x = splnet(); 4741 sp->pp_auth_failures = 0; 4742 splx(x); 4743 4744 log(LOG_DEBUG, "%s: chap %s", ifp->if_xname, 4745 sp->pp_phase == SPPP_PHASE_NETWORK ? "reconfirmed" : "tlu"); 4746 4747 /* 4748 * Some broken CHAP implementations (Conware CoNet, firmware 4749 * 4.0.?) don't want to re-authenticate their CHAP once the 4750 * initial challenge-response exchange has taken place. 4751 * Provide for an option to avoid rechallenges. 4752 */ 4753 if (ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_SERV) && 4754 (sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4755 /* 4756 * Compute the re-challenge timeout. This will yield 4757 * a number between 300 and 810 seconds. 4758 */ 4759 i = 300 + ((unsigned)(cprng_fast32() & 0xff00) >> 7); 4760 callout_schedule(&sp->scp[IDX_CHAP].ch, i * hz); 4761 4762 if (debug) { 4763 addlog(", next rechallenge in %d seconds", i); 4764 } 4765 } 4766 4767 addlog("\n"); 4768 4769 /* 4770 * If we are already in phase network, we are done here. This 4771 * is the case if this is a dummy tlu event after a re-challenge. 4772 */ 4773 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4774 sppp_phase_network(sp); 4775 } 4776 4777 static void 4778 sppp_chap_scr(struct sppp *sp) 4779 { 4780 uint32_t *ch; 4781 u_char clen, dsize; 4782 int role; 4783 4784 KASSERT(SPPP_WLOCKED(sp)); 4785 4786 role = sppp_auth_role(&chap, sp); 4787 4788 if (ISSET(role, SPPP_AUTH_SERV) && 4789 !sp->chap.response_rcvd) { 4790 /* we are authenticator for CHAP, send challenge */ 4791 ch = (uint32_t *)sp->chap.challenge; 4792 clen = sizeof(sp->chap.challenge); 4793 /* Compute random challenge. */ 4794 cprng_strong(kern_cprng, ch, clen, 0); 4795 4796 sp->scp[IDX_CHAP].confid = ++sp->scp[IDX_CHAP].seq; 4797 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->scp[IDX_CHAP].confid, 4798 sizeof(clen), (const char *)&clen, 4799 sizeof(sp->chap.challenge), sp->chap.challenge, 4800 0); 4801 } 4802 4803 if (ISSET(role, SPPP_AUTH_PEER) && 4804 sp->chap.digest_len > 0) { 4805 /* we are peer for CHAP, send response */ 4806 dsize = sp->chap.digest_len; 4807 4808 sppp_auth_send(&chap, sp, CHAP_RESPONSE, sp->scp[IDX_CHAP].rconfid, 4809 sizeof(dsize), (const char *)&dsize, 4810 sp->chap.digest_len, sp->chap.digest, 4811 sp->myauth.name_len, sp->myauth.name, 0); 4812 } 4813 } 4814 4815 static void 4816 sppp_chap_rcv_challenge_event(struct sppp *sp, void *xcp) 4817 { 4818 const struct cp *cp = xcp; 4819 4820 KASSERT(!cpu_softintr_p()); 4821 4822 sp->chap.rechallenging = false; 4823 4824 switch (sp->scp[IDX_CHAP].state) { 4825 case STATE_REQ_SENT: 4826 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 4827 cp->scr(sp); 4828 break; 4829 case STATE_OPENED: 4830 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 4831 cp->scr(sp); 4832 break; 4833 } 4834 } 4835 4836 /* 4837 *--------------------------------------------------------------------------* 4838 * * 4839 * The PAP implementation. * 4840 * * 4841 *--------------------------------------------------------------------------* 4842 */ 4843 /* 4844 * PAP uses following actions and events. 4845 * Actions: 4846 * - scr: send PAP_REQ 4847 * - sca: send PAP_ACK 4848 * - scn: send PAP_NAK 4849 * Events: 4850 * - RCR+: receive PAP_REQ containing correct username and password 4851 * - RCR-: receive PAP_REQ containing wrong username and password 4852 * - RCA: receive PAP_ACK 4853 * - RCN: (this event is unused) 4854 * - TO+: re-send PAP_REQ 4855 * - TO-: this layer finish 4856 */ 4857 4858 /* 4859 * Handle incoming PAP packets. */ 4860 static void 4861 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4862 { 4863 STDDCL; 4864 struct lcp_header *h; 4865 int len, x; 4866 char *name, *secret; 4867 int name_len, secret_len; 4868 4869 /* 4870 * Malicious input might leave this uninitialized, so 4871 * init to an impossible value. 4872 */ 4873 secret_len = -1; 4874 4875 len = m->m_pkthdr.len; 4876 if (len < 5) { 4877 if (debug) 4878 log(LOG_DEBUG, 4879 "%s: pap invalid packet length: %d bytes\n", 4880 ifp->if_xname, len); 4881 return; 4882 } 4883 h = mtod(m, struct lcp_header *); 4884 if (len > ntohs(h->len)) 4885 len = ntohs(h->len); 4886 4887 SPPP_LOCK(sp, RW_WRITER); 4888 4889 switch (h->type) { 4890 /* PAP request is my authproto */ 4891 case PAP_REQ: 4892 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4893 /* can't do anything useful */ 4894 printf("%s: pap request" 4895 " without his name and his secret being set\n", 4896 ifp->if_xname); 4897 break; 4898 } 4899 name = 1 + (u_char *)(h + 1); 4900 name_len = name[-1]; 4901 secret = name + name_len + 1; 4902 if (name_len > len - 6 || 4903 (secret_len = secret[-1]) > len - 6 - name_len) { 4904 if (debug) { 4905 log(LOG_DEBUG, "%s: pap corrupted input " 4906 "<%s id=0x%x len=%d", 4907 ifp->if_xname, 4908 sppp_auth_type_name(PPP_PAP, h->type), 4909 h->ident, ntohs(h->len)); 4910 if (len > 4) 4911 sppp_print_bytes((u_char *)(h + 1), 4912 len - 4); 4913 addlog(">\n"); 4914 } 4915 break; 4916 } 4917 if (debug) { 4918 log(LOG_DEBUG, "%s: pap input(%s) " 4919 "<%s id=0x%x len=%d name=", 4920 ifp->if_xname, 4921 sppp_state_name(sp->scp[IDX_PAP].state), 4922 sppp_auth_type_name(PPP_PAP, h->type), 4923 h->ident, ntohs(h->len)); 4924 sppp_print_string((char *)name, name_len); 4925 addlog(" secret="); 4926 sppp_print_string((char *)secret, secret_len); 4927 addlog(">\n"); 4928 } 4929 4930 sp->scp[IDX_PAP].rconfid = h->ident; 4931 4932 if (name_len == sp->hisauth.name_len && 4933 memcmp(name, sp->hisauth.name, name_len) == 0 && 4934 secret_len == sp->hisauth.secret_len && 4935 memcmp(secret, sp->hisauth.secret, secret_len) == 0) { 4936 sp->scp[IDX_PAP].rcr_type = CP_RCR_ACK; 4937 if (!ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_PEER)) { 4938 /* generate a dummy RCA event*/ 4939 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rca); 4940 } 4941 } else { 4942 sp->scp[IDX_PAP].rcr_type = CP_RCR_NAK; 4943 } 4944 4945 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rcr); 4946 break; 4947 4948 /* ack and nak are his authproto */ 4949 case PAP_ACK: 4950 if (debug) { 4951 log(LOG_DEBUG, "%s: pap success", 4952 ifp->if_xname); 4953 name = 1 + (u_char *)(h + 1); 4954 name_len = name[-1]; 4955 if (len > 5 && name_len < len+4) { 4956 addlog(": "); 4957 sppp_print_string(name, name_len); 4958 } 4959 addlog("\n"); 4960 } 4961 4962 if (h->ident != sp->scp[IDX_PAP].confid) { 4963 if (debug) { 4964 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4965 ifp->if_xname, pap.name, 4966 h->ident, sp->scp[IDX_PAP].rconfid); 4967 } 4968 if_statinc(ifp, if_ierrors); 4969 break; 4970 } 4971 4972 x = splnet(); 4973 sp->pp_auth_failures = 0; 4974 sp->pp_flags &= ~PP_NEEDAUTH; 4975 splx(x); 4976 4977 /* we are not authenticator, generate a dummy RCR+ event */ 4978 if (!ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_SERV)) { 4979 sp->scp[IDX_PAP].rcr_type = CP_RCR_ACK; 4980 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rcr); 4981 } 4982 4983 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rca); 4984 break; 4985 4986 case PAP_NAK: 4987 if (debug) { 4988 log(LOG_INFO, "%s: pap failure", 4989 ifp->if_xname); 4990 name = 1 + (u_char *)(h + 1); 4991 name_len = name[-1]; 4992 if (len > 5 && name_len < len+4) { 4993 addlog(": "); 4994 sppp_print_string(name, name_len); 4995 } 4996 addlog("\n"); 4997 } else 4998 log(LOG_INFO, "%s: pap failure\n", 4999 ifp->if_xname); 5000 5001 if (h->ident != sp->scp[IDX_PAP].confid) { 5002 if (debug) { 5003 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 5004 ifp->if_xname, pap.name, 5005 h->ident, sp->scp[IDX_PAP].rconfid); 5006 } 5007 if_statinc(ifp, if_ierrors); 5008 break; 5009 } 5010 5011 sp->pp_auth_failures++; 5012 /* 5013 * await LCP shutdown by authenticator, 5014 * so we don't have to enqueue sc->scp[IDX_PAP].work_rcn 5015 */ 5016 break; 5017 5018 default: 5019 /* Unknown PAP packet type -- ignore. */ 5020 if (debug) { 5021 log(LOG_DEBUG, "%s: pap corrupted input " 5022 "<0x%x id=0x%x len=%d", 5023 ifp->if_xname, 5024 h->type, h->ident, ntohs(h->len)); 5025 if (len > 4) 5026 sppp_print_bytes((u_char *)(h + 1), len - 4); 5027 addlog(">\n"); 5028 } 5029 break; 5030 } 5031 5032 SPPP_UNLOCK(sp); 5033 } 5034 5035 static void 5036 sppp_pap_init(struct sppp *sp) 5037 { 5038 5039 KASSERT(SPPP_WLOCKED(sp)); 5040 sppp_cp_init(&pap, sp); 5041 } 5042 5043 static void 5044 sppp_pap_tlu(struct sppp *sp) 5045 { 5046 STDDCL; 5047 int x; 5048 5049 sp->scp[IDX_PAP].rst_counter = sp->lcp.max_configure; 5050 5051 if (debug) 5052 log(LOG_DEBUG, "%s: %s tlu\n", 5053 ifp->if_xname, pap.name); 5054 5055 x = splnet(); 5056 sp->pp_auth_failures = 0; 5057 splx(x); 5058 5059 if (sp->pp_phase < SPPP_PHASE_NETWORK) 5060 sppp_phase_network(sp); 5061 } 5062 5063 static void 5064 sppp_pap_scr(struct sppp *sp) 5065 { 5066 u_char idlen, pwdlen; 5067 5068 KASSERT(SPPP_WLOCKED(sp)); 5069 5070 if (ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_PEER) && 5071 sp->scp[IDX_PAP].state != STATE_ACK_RCVD) { 5072 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 5073 log(LOG_DEBUG, "%s: couldn't send PAP_REQ " 5074 "because of no name or no secret\n", 5075 sp->pp_if.if_xname); 5076 } else { 5077 sp->scp[IDX_PAP].confid = ++sp->scp[IDX_PAP].seq; 5078 pwdlen = sp->myauth.secret_len; 5079 idlen = sp->myauth.name_len; 5080 5081 sppp_auth_send(&pap, sp, PAP_REQ, sp->scp[IDX_PAP].confid, 5082 sizeof idlen, (const char *)&idlen, 5083 idlen, sp->myauth.name, 5084 sizeof pwdlen, (const char *)&pwdlen, 5085 pwdlen, sp->myauth.secret, 5086 0); 5087 } 5088 } 5089 } 5090 5091 /* 5092 * Random miscellaneous functions. 5093 */ 5094 5095 /* 5096 * Send a PAP or CHAP proto packet. 5097 * 5098 * Varadic function, each of the elements for the ellipsis is of type 5099 * ``size_t mlen, const u_char *msg''. Processing will stop iff 5100 * mlen == 0. 5101 * NOTE: never declare variadic functions with types subject to type 5102 * promotion (i.e. u_char). This is asking for big trouble depending 5103 * on the architecture you are on... 5104 */ 5105 5106 static void 5107 sppp_auth_send(const struct cp *cp, struct sppp *sp, 5108 unsigned int type, unsigned int id, 5109 ...) 5110 { 5111 STDDCL; 5112 struct lcp_header *lh; 5113 struct mbuf *m; 5114 u_char *p; 5115 int len; 5116 size_t pkthdrlen; 5117 unsigned int mlen; 5118 const char *msg; 5119 va_list ap; 5120 5121 KASSERT(SPPP_WLOCKED(sp)); 5122 5123 MGETHDR(m, M_DONTWAIT, MT_DATA); 5124 if (! m) 5125 return; 5126 m_reset_rcvif(m); 5127 5128 if (sp->pp_flags & PP_NOFRAMING) { 5129 *mtod(m, uint16_t *) = htons(cp->proto); 5130 pkthdrlen = 2; 5131 lh = (struct lcp_header *)(mtod(m, uint8_t *)+2); 5132 } else { 5133 struct ppp_header *h; 5134 h = mtod(m, struct ppp_header *); 5135 h->address = PPP_ALLSTATIONS; /* broadcast address */ 5136 h->control = PPP_UI; /* Unnumbered Info */ 5137 h->protocol = htons(cp->proto); 5138 pkthdrlen = PPP_HEADER_LEN; 5139 5140 lh = (struct lcp_header *)(h + 1); 5141 } 5142 5143 lh->type = type; 5144 lh->ident = id; 5145 p = (u_char *)(lh + 1); 5146 5147 va_start(ap, id); 5148 len = 0; 5149 5150 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 5151 msg = va_arg(ap, const char *); 5152 len += mlen; 5153 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 5154 va_end(ap); 5155 m_freem(m); 5156 return; 5157 } 5158 5159 memcpy(p, msg, mlen); 5160 p += mlen; 5161 } 5162 va_end(ap); 5163 5164 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 5165 lh->len = htons(LCP_HEADER_LEN + len); 5166 5167 if (debug) { 5168 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 5169 ifp->if_xname, cp->name, 5170 sppp_auth_type_name(cp->proto, lh->type), 5171 lh->ident, ntohs(lh->len)); 5172 if (len) 5173 sppp_print_bytes((u_char *)(lh + 1), len); 5174 addlog(">\n"); 5175 } 5176 if (IF_QFULL(&sp->pp_cpq)) { 5177 IF_DROP(&sp->pp_fastq); 5178 IF_DROP(&ifp->if_snd); 5179 m_freem(m); 5180 if_statinc(ifp, if_oerrors); 5181 return; 5182 } 5183 5184 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 5185 IF_ENQUEUE(&sp->pp_cpq, m); 5186 5187 if (! (ifp->if_flags & IFF_OACTIVE)) { 5188 SPPP_UNLOCK(sp); 5189 if_start_lock(ifp); 5190 SPPP_LOCK(sp, RW_WRITER); 5191 } 5192 } 5193 5194 static int 5195 sppp_auth_role(const struct cp *cp, struct sppp *sp) 5196 { 5197 int role; 5198 5199 role = SPPP_AUTH_NOROLE; 5200 5201 if (sp->hisauth.proto == cp->proto && 5202 ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO)) 5203 SET(role, SPPP_AUTH_SERV); 5204 5205 if (sp->myauth.proto == cp->proto) 5206 SET(role, SPPP_AUTH_PEER); 5207 5208 return role; 5209 } 5210 5211 static void 5212 sppp_auth_to_event(struct sppp *sp, void *xcp) 5213 { 5214 const struct cp *cp = xcp; 5215 bool override; 5216 int state; 5217 STDDCL; 5218 5219 KASSERT(SPPP_WLOCKED(sp)); 5220 KASSERT(!cpu_softintr_p()); 5221 5222 override = false; 5223 state = sp->scp[cp->protoidx].state; 5224 5225 if (sp->scp[cp->protoidx].rst_counter > 0) { 5226 /* override TO+ event */ 5227 switch (state) { 5228 case STATE_OPENED: 5229 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 5230 override = true; 5231 sp->chap.rechallenging = true; 5232 sp->chap.response_rcvd = false; 5233 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 5234 cp->scr(sp); 5235 } 5236 break; 5237 5238 case STATE_ACK_RCVD: 5239 override = true; 5240 cp->scr(sp); 5241 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 5242 break; 5243 } 5244 } 5245 5246 if (override) { 5247 if (debug) 5248 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 5249 ifp->if_xname, cp->name, 5250 sppp_state_name(state), 5251 sp->scp[cp->protoidx].rst_counter); 5252 sp->scp[cp->protoidx].rst_counter--; 5253 } else { 5254 sppp_to_event(sp, xcp); 5255 } 5256 } 5257 5258 static void 5259 sppp_auth_sca_scn(const struct cp *cp, struct sppp *sp) 5260 { 5261 static const char *succmsg = "Welcome!"; 5262 static const char *failmsg = "Failed..."; 5263 const char *msg; 5264 u_char type, rconfid, mlen; 5265 5266 KASSERT(SPPP_WLOCKED(sp)); 5267 5268 if (!ISSET(sppp_auth_role(cp, sp), SPPP_AUTH_SERV)) 5269 return; 5270 5271 rconfid = sp->scp[cp->protoidx].rconfid; 5272 5273 if (sp->scp[cp->protoidx].rcr_type == CP_RCR_ACK) { 5274 type = cp->proto == PPP_CHAP ? CHAP_SUCCESS : PAP_ACK; 5275 msg = succmsg; 5276 mlen = sizeof(succmsg) - 1; 5277 5278 sp->pp_auth_failures = 0; 5279 } else { 5280 type = cp->proto == PPP_CHAP ? CHAP_FAILURE : PAP_NAK; 5281 msg = failmsg; 5282 mlen = sizeof(failmsg) - 1; 5283 5284 /* shutdown LCP if auth failed */ 5285 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5286 sp->pp_auth_failures++; 5287 } 5288 5289 sppp_auth_send(cp, sp, type, rconfid, 5290 mlen, (const u_char *)msg, 0); 5291 } 5292 5293 /* 5294 * Send keepalive packets, every 10 seconds. 5295 */ 5296 static void 5297 sppp_keepalive(void *dummy) 5298 { 5299 struct sppp *sp; 5300 int s; 5301 time_t now; 5302 5303 SPPPQ_LOCK(); 5304 5305 s = splnet(); 5306 now = time_uptime; 5307 for (sp=spppq; sp; sp=sp->pp_next) { 5308 struct ifnet *ifp = NULL; 5309 5310 SPPP_LOCK(sp, RW_WRITER); 5311 ifp = &sp->pp_if; 5312 5313 /* check idle timeout */ 5314 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 5315 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 5316 /* idle timeout is enabled for this interface */ 5317 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 5318 if (ifp->if_flags & IFF_DEBUG) 5319 printf("%s: no activity for %lu seconds\n", 5320 sp->pp_if.if_xname, 5321 (unsigned long)(now-sp->pp_last_activity)); 5322 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5323 SPPP_UNLOCK(sp); 5324 continue; 5325 } 5326 } 5327 5328 /* Keepalive mode disabled or channel down? */ 5329 if (! (sp->pp_flags & PP_KEEPALIVE) || 5330 ! (ifp->if_flags & IFF_RUNNING)) { 5331 SPPP_UNLOCK(sp); 5332 continue; 5333 } 5334 5335 /* No keepalive in PPP mode if LCP not opened yet. */ 5336 if (! (sp->pp_flags & PP_CISCO) && 5337 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 5338 SPPP_UNLOCK(sp); 5339 continue; 5340 } 5341 5342 /* No echo reply, but maybe user data passed through? */ 5343 if ((now - sp->pp_last_receive) < sp->pp_max_noreceive) { 5344 sp->pp_alivecnt = 0; 5345 SPPP_UNLOCK(sp); 5346 continue; 5347 } 5348 5349 if (sp->pp_alivecnt >= sp->pp_maxalive) { 5350 /* No keepalive packets got. Stop the interface. */ 5351 sppp_wq_add(sp->wq_cp, &sp->work_ifdown); 5352 5353 if (! (sp->pp_flags & PP_CISCO)) { 5354 printf("%s: LCP keepalive timed out, going to restart the connection\n", 5355 ifp->if_xname); 5356 sp->pp_alivecnt = 0; 5357 5358 /* we are down, close all open protocols */ 5359 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5360 5361 /* And now prepare LCP to reestablish the link, if configured to do so. */ 5362 sp->lcp.reestablish = true; 5363 5364 SPPP_UNLOCK(sp); 5365 continue; 5366 } 5367 } 5368 if (sp->pp_alivecnt < sp->pp_maxalive) 5369 ++sp->pp_alivecnt; 5370 if (sp->pp_flags & PP_CISCO) 5371 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, 5372 ++sp->scp[IDX_LCP].seq, sp->scp[IDX_LCP].rseq); 5373 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 5374 int32_t nmagic = htonl(sp->lcp.magic); 5375 sp->lcp.echoid = ++sp->scp[IDX_LCP].seq; 5376 sppp_cp_send(sp, PPP_LCP, ECHO_REQ, 5377 sp->lcp.echoid, 4, &nmagic); 5378 } 5379 5380 SPPP_UNLOCK(sp); 5381 } 5382 splx(s); 5383 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 5384 5385 SPPPQ_UNLOCK(); 5386 } 5387 5388 #ifdef INET 5389 /* 5390 * Get both IP addresses. 5391 */ 5392 static void 5393 sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, uint32_t *srcmask) 5394 { 5395 struct ifnet *ifp = &sp->pp_if; 5396 struct ifaddr *ifa; 5397 struct sockaddr_in *si, *sm; 5398 uint32_t ssrc, ddst; 5399 int s; 5400 struct psref psref; 5401 5402 sm = NULL; 5403 ssrc = ddst = 0; 5404 /* 5405 * Pick the first AF_INET address from the list, 5406 * aliases don't make any sense on a p2p link anyway. 5407 */ 5408 si = 0; 5409 s = pserialize_read_enter(); 5410 IFADDR_READER_FOREACH(ifa, ifp) { 5411 if (ifa->ifa_addr->sa_family == AF_INET) { 5412 si = (struct sockaddr_in *)ifa->ifa_addr; 5413 sm = (struct sockaddr_in *)ifa->ifa_netmask; 5414 if (si) { 5415 ifa_acquire(ifa, &psref); 5416 break; 5417 } 5418 } 5419 } 5420 pserialize_read_exit(s); 5421 if (ifa) { 5422 if (si && si->sin_addr.s_addr) { 5423 ssrc = si->sin_addr.s_addr; 5424 if (srcmask) 5425 *srcmask = ntohl(sm->sin_addr.s_addr); 5426 } 5427 5428 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 5429 if (si && si->sin_addr.s_addr) 5430 ddst = si->sin_addr.s_addr; 5431 ifa_release(ifa, &psref); 5432 } 5433 5434 if (dst) *dst = ntohl(ddst); 5435 if (src) *src = ntohl(ssrc); 5436 } 5437 5438 /* 5439 * Set IP addresses. Must be called at splnet. 5440 * If an address is 0, leave it the way it is. 5441 */ 5442 static void 5443 sppp_set_ip_addrs(struct sppp *sp) 5444 { 5445 STDDCL; 5446 struct ifaddr *ifa; 5447 struct sockaddr_in *si, *dest; 5448 uint32_t myaddr = 0, hisaddr = 0; 5449 int s; 5450 5451 IFNET_LOCK(ifp); 5452 5453 /* 5454 * Pick the first AF_INET address from the list, 5455 * aliases don't make any sense on a p2p link anyway. 5456 */ 5457 si = dest = NULL; 5458 s = pserialize_read_enter(); 5459 IFADDR_READER_FOREACH(ifa, ifp) { 5460 if (ifa->ifa_addr->sa_family == AF_INET) { 5461 si = (struct sockaddr_in *)ifa->ifa_addr; 5462 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5463 break; 5464 } 5465 } 5466 pserialize_read_exit(s); 5467 5468 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 5469 myaddr = sp->ipcp.req_myaddr; 5470 else if (si != NULL) 5471 myaddr = ntohl(si->sin_addr.s_addr); 5472 5473 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 5474 hisaddr = sp->ipcp.req_hisaddr; 5475 else if (dest != NULL) 5476 hisaddr = ntohl(dest->sin_addr.s_addr); 5477 5478 if (si != NULL && dest != NULL) { 5479 int error; 5480 struct sockaddr_in new_sin = *si; 5481 struct sockaddr_in new_dst = *dest; 5482 5483 if (myaddr != 0) 5484 new_sin.sin_addr.s_addr = htonl(myaddr); 5485 if (hisaddr != 0) { 5486 new_dst.sin_addr.s_addr = htonl(hisaddr); 5487 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) 5488 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 5489 } 5490 5491 in_addrhash_remove(ifatoia(ifa)); 5492 5493 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5494 5495 in_addrhash_insert(ifatoia(ifa)); 5496 5497 if (debug && error) 5498 { 5499 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5500 ifp->if_xname, __func__, error); 5501 } 5502 if (!error) { 5503 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5504 } 5505 } 5506 5507 if (ifp->if_mtu > sp->lcp.their_mru) { 5508 sp->pp_saved_mtu = ifp->if_mtu; 5509 ifp->if_mtu = sp->lcp.their_mru; 5510 if (debug) 5511 log(LOG_DEBUG, 5512 "%s: setting MTU to %" PRIu64 " bytes\n", 5513 ifp->if_xname, ifp->if_mtu); 5514 } 5515 5516 IFNET_UNLOCK(ifp); 5517 5518 sppp_notify_con(sp); 5519 } 5520 5521 /* 5522 * Clear IP addresses. Must be called at splnet. 5523 */ 5524 static void 5525 sppp_clear_ip_addrs(struct sppp *sp) 5526 { 5527 STDDCL; 5528 struct ifaddr *ifa; 5529 struct sockaddr_in *si, *dest; 5530 int s; 5531 5532 IFNET_LOCK(ifp); 5533 5534 /* 5535 * Pick the first AF_INET address from the list, 5536 * aliases don't make any sense on a p2p link anyway. 5537 */ 5538 si = dest = NULL; 5539 s = pserialize_read_enter(); 5540 IFADDR_READER_FOREACH(ifa, ifp) { 5541 if (ifa->ifa_addr->sa_family == AF_INET) { 5542 si = (struct sockaddr_in *)ifa->ifa_addr; 5543 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5544 break; 5545 } 5546 } 5547 pserialize_read_exit(s); 5548 5549 if (si != NULL) { 5550 struct sockaddr_in new_sin = *si; 5551 struct sockaddr_in new_dst = *dest; 5552 int error; 5553 5554 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 5555 new_sin.sin_addr.s_addr = 0; 5556 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 5557 new_dst.sin_addr.s_addr = sp->ipcp.saved_hisaddr; 5558 5559 in_addrhash_remove(ifatoia(ifa)); 5560 5561 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5562 5563 in_addrhash_insert(ifatoia(ifa)); 5564 5565 if (debug && error) 5566 { 5567 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5568 ifp->if_xname, __func__, error); 5569 } 5570 if (!error) { 5571 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5572 } 5573 } 5574 5575 if (sp->pp_saved_mtu > 0) { 5576 ifp->if_mtu = sp->pp_saved_mtu; 5577 sp->pp_saved_mtu = 0; 5578 if (debug) 5579 log(LOG_DEBUG, 5580 "%s: resetting MTU to %" PRIu64 " bytes\n", 5581 ifp->if_xname, ifp->if_mtu); 5582 } 5583 5584 IFNET_UNLOCK(ifp); 5585 } 5586 #endif 5587 5588 #ifdef INET6 5589 /* 5590 * Get both IPv6 addresses. 5591 */ 5592 static void 5593 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 5594 struct in6_addr *srcmask) 5595 { 5596 struct ifnet *ifp = &sp->pp_if; 5597 struct ifaddr *ifa; 5598 struct sockaddr_in6 *si, *sm; 5599 struct in6_addr ssrc, ddst; 5600 int s; 5601 struct psref psref; 5602 5603 sm = NULL; 5604 memset(&ssrc, 0, sizeof(ssrc)); 5605 memset(&ddst, 0, sizeof(ddst)); 5606 /* 5607 * Pick the first link-local AF_INET6 address from the list, 5608 * aliases don't make any sense on a p2p link anyway. 5609 */ 5610 si = 0; 5611 s = pserialize_read_enter(); 5612 IFADDR_READER_FOREACH(ifa, ifp) { 5613 if (ifa->ifa_addr->sa_family == AF_INET6) { 5614 si = (struct sockaddr_in6 *)ifa->ifa_addr; 5615 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 5616 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) { 5617 ifa_acquire(ifa, &psref); 5618 break; 5619 } 5620 } 5621 } 5622 pserialize_read_exit(s); 5623 5624 if (ifa) { 5625 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 5626 memcpy(&ssrc, &si->sin6_addr, sizeof(ssrc)); 5627 if (srcmask) { 5628 memcpy(srcmask, &sm->sin6_addr, 5629 sizeof(*srcmask)); 5630 } 5631 } 5632 5633 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 5634 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 5635 memcpy(&ddst, &si->sin6_addr, sizeof(ddst)); 5636 ifa_release(ifa, &psref); 5637 } 5638 5639 if (dst) 5640 memcpy(dst, &ddst, sizeof(*dst)); 5641 if (src) 5642 memcpy(src, &ssrc, sizeof(*src)); 5643 } 5644 5645 #ifdef IPV6CP_MYIFID_DYN 5646 /* 5647 * Generate random ifid. 5648 */ 5649 static void 5650 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 5651 { 5652 /* TBD */ 5653 } 5654 5655 /* 5656 * Set my IPv6 address. Must be called at splnet. 5657 */ 5658 static void 5659 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 5660 { 5661 STDDCL; 5662 struct ifaddr *ifa; 5663 struct sockaddr_in6 *sin6; 5664 int s; 5665 struct psref psref; 5666 5667 IFNET_LOCK(ifp); 5668 5669 /* 5670 * Pick the first link-local AF_INET6 address from the list, 5671 * aliases don't make any sense on a p2p link anyway. 5672 */ 5673 5674 sin6 = NULL; 5675 s = pserialize_read_enter(); 5676 IFADDR_READER_FOREACH(ifa, ifp) 5677 { 5678 if (ifa->ifa_addr->sa_family == AF_INET6) 5679 { 5680 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 5681 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 5682 ifa_acquire(ifa, &psref); 5683 break; 5684 } 5685 } 5686 } 5687 pserialize_read_exit(s); 5688 5689 if (ifa && sin6) 5690 { 5691 int error; 5692 struct sockaddr_in6 new_sin6 = *sin6; 5693 5694 memcpy(&new_sin6.sin6_addr, src, sizeof(new_sin6.sin6_addr)); 5695 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 5696 if (debug && error) 5697 { 5698 log(LOG_DEBUG, "%s: %s: in6_ifinit failed, error=%d\n", 5699 ifp->if_xname, __func__, error); 5700 } 5701 if (!error) { 5702 pfil_run_addrhooks(if_pfil, SIOCAIFADDR_IN6, ifa); 5703 } 5704 ifa_release(ifa, &psref); 5705 } 5706 5707 IFNET_UNLOCK(ifp); 5708 } 5709 #endif 5710 5711 /* 5712 * Suggest a candidate address to be used by peer. 5713 */ 5714 static void 5715 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 5716 { 5717 struct in6_addr myaddr; 5718 struct timeval tv; 5719 5720 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 5721 5722 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 5723 microtime(&tv); 5724 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 5725 myaddr.s6_addr[14] ^= 0xff; 5726 myaddr.s6_addr[15] ^= 0xff; 5727 } else { 5728 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 5729 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 5730 } 5731 if (suggest) 5732 memcpy(suggest, &myaddr, sizeof(myaddr)); 5733 } 5734 #endif /*INET6*/ 5735 5736 /* 5737 * Process ioctl requests specific to the PPP interface. 5738 * Permissions have already been checked. 5739 */ 5740 static int 5741 sppp_params(struct sppp *sp, u_long cmd, void *data) 5742 { 5743 switch (cmd) { 5744 case SPPPGETAUTHCFG: 5745 { 5746 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5747 int error; 5748 size_t len; 5749 5750 SPPP_LOCK(sp, RW_READER); 5751 5752 cfg->myauthflags = sp->myauth.flags; 5753 cfg->hisauthflags = sp->hisauth.flags; 5754 strlcpy(cfg->ifname, sp->pp_if.if_xname, sizeof(cfg->ifname)); 5755 cfg->hisauth = 0; 5756 if (sp->hisauth.proto) 5757 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5758 cfg->myauth = 0; 5759 if (sp->myauth.proto) 5760 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5761 if (cfg->myname_length == 0) { 5762 if (sp->myauth.name != NULL) 5763 cfg->myname_length = sp->myauth.name_len + 1; 5764 } else { 5765 if (sp->myauth.name == NULL) { 5766 cfg->myname_length = 0; 5767 } else { 5768 len = sp->myauth.name_len + 1; 5769 5770 if (cfg->myname_length < len) { 5771 SPPP_UNLOCK(sp); 5772 return (ENAMETOOLONG); 5773 } 5774 error = copyout(sp->myauth.name, cfg->myname, len); 5775 if (error) { 5776 SPPP_UNLOCK(sp); 5777 return error; 5778 } 5779 } 5780 } 5781 if (cfg->hisname_length == 0) { 5782 if (sp->hisauth.name != NULL) 5783 cfg->hisname_length = sp->hisauth.name_len + 1; 5784 } else { 5785 if (sp->hisauth.name == NULL) { 5786 cfg->hisname_length = 0; 5787 } else { 5788 len = sp->hisauth.name_len + 1; 5789 5790 if (cfg->hisname_length < len) { 5791 SPPP_UNLOCK(sp); 5792 return (ENAMETOOLONG); 5793 } 5794 error = copyout(sp->hisauth.name, cfg->hisname, len); 5795 if (error) { 5796 SPPP_UNLOCK(sp); 5797 return error; 5798 } 5799 } 5800 } 5801 SPPP_UNLOCK(sp); 5802 } 5803 break; 5804 case SPPPSETAUTHCFG: 5805 { 5806 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5807 int error; 5808 5809 SPPP_LOCK(sp, RW_WRITER); 5810 5811 if (sp->myauth.name) { 5812 free(sp->myauth.name, M_DEVBUF); 5813 sp->myauth.name = NULL; 5814 } 5815 if (sp->myauth.secret) { 5816 free(sp->myauth.secret, M_DEVBUF); 5817 sp->myauth.secret = NULL; 5818 } 5819 if (sp->hisauth.name) { 5820 free(sp->hisauth.name, M_DEVBUF); 5821 sp->hisauth.name = NULL; 5822 } 5823 if (sp->hisauth.secret) { 5824 free(sp->hisauth.secret, M_DEVBUF); 5825 sp->hisauth.secret = NULL; 5826 } 5827 5828 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5829 if (cfg->hisname_length >= MCLBYTES) { 5830 SPPP_UNLOCK(sp); 5831 return (ENAMETOOLONG); 5832 } 5833 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5834 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5835 if (error) { 5836 free(sp->hisauth.name, M_DEVBUF); 5837 sp->hisauth.name = NULL; 5838 SPPP_UNLOCK(sp); 5839 return error; 5840 } 5841 sp->hisauth.name_len = cfg->hisname_length - 1; 5842 sp->hisauth.name[sp->hisauth.name_len] = 0; 5843 } 5844 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5845 if (cfg->hissecret_length >= MCLBYTES) { 5846 SPPP_UNLOCK(sp); 5847 return (ENAMETOOLONG); 5848 } 5849 sp->hisauth.secret = malloc(cfg->hissecret_length, 5850 M_DEVBUF, M_WAITOK); 5851 error = copyin(cfg->hissecret, sp->hisauth.secret, 5852 cfg->hissecret_length); 5853 if (error) { 5854 free(sp->hisauth.secret, M_DEVBUF); 5855 sp->hisauth.secret = NULL; 5856 SPPP_UNLOCK(sp); 5857 return error; 5858 } 5859 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5860 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5861 } 5862 if (cfg->myname != NULL && cfg->myname_length > 0) { 5863 if (cfg->myname_length >= MCLBYTES) { 5864 SPPP_UNLOCK(sp); 5865 return (ENAMETOOLONG); 5866 } 5867 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5868 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5869 if (error) { 5870 free(sp->myauth.name, M_DEVBUF); 5871 sp->myauth.name = NULL; 5872 SPPP_UNLOCK(sp); 5873 return error; 5874 } 5875 sp->myauth.name_len = cfg->myname_length - 1; 5876 sp->myauth.name[sp->myauth.name_len] = 0; 5877 } 5878 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5879 if (cfg->mysecret_length >= MCLBYTES) { 5880 SPPP_UNLOCK(sp); 5881 return (ENAMETOOLONG); 5882 } 5883 sp->myauth.secret = malloc(cfg->mysecret_length, 5884 M_DEVBUF, M_WAITOK); 5885 error = copyin(cfg->mysecret, sp->myauth.secret, 5886 cfg->mysecret_length); 5887 if (error) { 5888 free(sp->myauth.secret, M_DEVBUF); 5889 sp->myauth.secret = NULL; 5890 SPPP_UNLOCK(sp); 5891 return error; 5892 } 5893 sp->myauth.secret_len = cfg->mysecret_length - 1; 5894 sp->myauth.secret[sp->myauth.secret_len] = 0; 5895 } 5896 sp->myauth.flags = cfg->myauthflags; 5897 if (cfg->myauth) 5898 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5899 sp->hisauth.flags = cfg->hisauthflags; 5900 if (cfg->hisauth) 5901 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5902 sp->pp_auth_failures = 0; 5903 if (sp->hisauth.proto != 0) 5904 SET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 5905 else 5906 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 5907 5908 SPPP_UNLOCK(sp); 5909 } 5910 break; 5911 case SPPPGETLCPCFG: 5912 { 5913 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5914 5915 SPPP_LOCK(sp, RW_READER); 5916 lcpp->lcp_timeout = sp->lcp.timeout; 5917 SPPP_UNLOCK(sp); 5918 } 5919 break; 5920 case SPPPSETLCPCFG: 5921 { 5922 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5923 5924 SPPP_LOCK(sp, RW_WRITER); 5925 sp->lcp.timeout = lcpp->lcp_timeout; 5926 SPPP_UNLOCK(sp); 5927 } 5928 break; 5929 case SPPPGETSTATUS: 5930 { 5931 struct spppstatus *status = (struct spppstatus *)data; 5932 5933 SPPP_LOCK(sp, RW_READER); 5934 status->phase = sp->pp_phase; 5935 SPPP_UNLOCK(sp); 5936 } 5937 break; 5938 case SPPPGETSTATUSNCP: 5939 { 5940 struct spppstatusncp *status = (struct spppstatusncp *)data; 5941 5942 SPPP_LOCK(sp, RW_READER); 5943 status->phase = sp->pp_phase; 5944 status->ncpup = sppp_cp_check(sp, CP_NCP); 5945 SPPP_UNLOCK(sp); 5946 } 5947 break; 5948 case SPPPGETIDLETO: 5949 { 5950 struct spppidletimeout *to = (struct spppidletimeout *)data; 5951 5952 SPPP_LOCK(sp, RW_READER); 5953 to->idle_seconds = sp->pp_idle_timeout; 5954 SPPP_UNLOCK(sp); 5955 } 5956 break; 5957 case SPPPSETIDLETO: 5958 { 5959 struct spppidletimeout *to = (struct spppidletimeout *)data; 5960 5961 SPPP_LOCK(sp, RW_WRITER); 5962 sp->pp_idle_timeout = to->idle_seconds; 5963 SPPP_UNLOCK(sp); 5964 } 5965 break; 5966 case SPPPSETAUTHFAILURE: 5967 { 5968 struct spppauthfailuresettings *afsettings = 5969 (struct spppauthfailuresettings *)data; 5970 5971 SPPP_LOCK(sp, RW_WRITER); 5972 sp->pp_max_auth_fail = afsettings->max_failures; 5973 sp->pp_auth_failures = 0; 5974 SPPP_UNLOCK(sp); 5975 } 5976 break; 5977 case SPPPGETAUTHFAILURES: 5978 { 5979 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5980 5981 SPPP_LOCK(sp, RW_READER); 5982 stats->auth_failures = sp->pp_auth_failures; 5983 stats->max_failures = sp->pp_max_auth_fail; 5984 SPPP_UNLOCK(sp); 5985 } 5986 break; 5987 case SPPPSETDNSOPTS: 5988 { 5989 struct spppdnssettings *req = (struct spppdnssettings *)data; 5990 5991 SPPP_LOCK(sp, RW_WRITER); 5992 sp->query_dns = req->query_dns & 3; 5993 SPPP_UNLOCK(sp); 5994 } 5995 break; 5996 case SPPPGETDNSOPTS: 5997 { 5998 struct spppdnssettings *req = (struct spppdnssettings *)data; 5999 6000 SPPP_LOCK(sp, RW_READER); 6001 req->query_dns = sp->query_dns; 6002 SPPP_UNLOCK(sp); 6003 } 6004 break; 6005 case SPPPGETDNSADDRS: 6006 { 6007 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; 6008 6009 SPPP_LOCK(sp, RW_READER); 6010 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 6011 SPPP_UNLOCK(sp); 6012 } 6013 break; 6014 case SPPPGETKEEPALIVE: 6015 { 6016 struct spppkeepalivesettings *settings = 6017 (struct spppkeepalivesettings*)data; 6018 6019 SPPP_LOCK(sp, RW_READER); 6020 settings->maxalive = sp->pp_maxalive; 6021 settings->max_noreceive = sp->pp_max_noreceive; 6022 SPPP_UNLOCK(sp); 6023 } 6024 break; 6025 case SPPPSETKEEPALIVE: 6026 { 6027 struct spppkeepalivesettings *settings = 6028 (struct spppkeepalivesettings*)data; 6029 6030 SPPP_LOCK(sp, RW_WRITER); 6031 sp->pp_maxalive = settings->maxalive; 6032 sp->pp_max_noreceive = settings->max_noreceive; 6033 SPPP_UNLOCK(sp); 6034 } 6035 break; 6036 case SPPPGETLCPSTATUS: 6037 { 6038 struct sppplcpstatus *status = 6039 (struct sppplcpstatus *)data; 6040 6041 SPPP_LOCK(sp, RW_READER); 6042 status->state = sp->scp[IDX_LCP].state; 6043 status->opts = sp->lcp.opts; 6044 status->magic = sp->lcp.magic; 6045 status->mru = sp->lcp.mru; 6046 SPPP_UNLOCK(sp); 6047 } 6048 break; 6049 case SPPPGETIPCPSTATUS: 6050 { 6051 struct spppipcpstatus *status = 6052 (struct spppipcpstatus *)data; 6053 u_int32_t myaddr; 6054 6055 SPPP_LOCK(sp, RW_READER); 6056 status->state = sp->scp[IDX_IPCP].state; 6057 status->opts = sp->ipcp.opts; 6058 #ifdef INET 6059 sppp_get_ip_addrs(sp, &myaddr, 0, 0); 6060 #else 6061 myaddr = 0; 6062 #endif 6063 status->myaddr = ntohl(myaddr); 6064 SPPP_UNLOCK(sp); 6065 } 6066 break; 6067 case SPPPGETIPV6CPSTATUS: 6068 { 6069 struct spppipv6cpstatus *status = 6070 (struct spppipv6cpstatus *)data; 6071 6072 SPPP_LOCK(sp, RW_READER); 6073 status->state = sp->scp[IDX_IPV6CP].state; 6074 memcpy(status->my_ifid, sp->ipv6cp.my_ifid, 6075 sizeof(status->my_ifid)); 6076 memcpy(status->his_ifid, sp->ipv6cp.his_ifid, 6077 sizeof(status->his_ifid)); 6078 SPPP_UNLOCK(sp); 6079 } 6080 break; 6081 default: 6082 { 6083 int ret; 6084 6085 MODULE_HOOK_CALL(sppp_params_50_hook, (sp, cmd, data), 6086 enosys(), ret); 6087 if (ret != ENOSYS) 6088 return ret; 6089 return (EINVAL); 6090 } 6091 } 6092 return (0); 6093 } 6094 6095 static void 6096 sppp_phase_network(struct sppp *sp) 6097 { 6098 int i; 6099 6100 KASSERT(SPPP_WLOCKED(sp)); 6101 6102 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 6103 6104 /* Notify NCPs now. */ 6105 for (i = 0; i < IDX_COUNT; i++) 6106 if ((cps[i])->flags & CP_NCP) 6107 sppp_wq_add(sp->wq_cp, &sp->scp[i].work_open); 6108 } 6109 6110 static const char * 6111 sppp_cp_type_name(u_char type) 6112 { 6113 static char buf[12]; 6114 switch (type) { 6115 case CONF_REQ: return "conf-req"; 6116 case CONF_ACK: return "conf-ack"; 6117 case CONF_NAK: return "conf-nak"; 6118 case CONF_REJ: return "conf-rej"; 6119 case TERM_REQ: return "term-req"; 6120 case TERM_ACK: return "term-ack"; 6121 case CODE_REJ: return "code-rej"; 6122 case PROTO_REJ: return "proto-rej"; 6123 case ECHO_REQ: return "echo-req"; 6124 case ECHO_REPLY: return "echo-reply"; 6125 case DISC_REQ: return "discard-req"; 6126 } 6127 snprintf(buf, sizeof(buf), "0x%x", type); 6128 return buf; 6129 } 6130 6131 static const char * 6132 sppp_auth_type_name(u_short proto, u_char type) 6133 { 6134 static char buf[32]; 6135 const char *name; 6136 6137 switch (proto) { 6138 case PPP_CHAP: 6139 switch (type) { 6140 case CHAP_CHALLENGE: return "challenge"; 6141 case CHAP_RESPONSE: return "response"; 6142 case CHAP_SUCCESS: return "success"; 6143 case CHAP_FAILURE: return "failure"; 6144 default: name = "chap"; break; 6145 } 6146 break; 6147 6148 case PPP_PAP: 6149 switch (type) { 6150 case PAP_REQ: return "req"; 6151 case PAP_ACK: return "ack"; 6152 case PAP_NAK: return "nak"; 6153 default: name = "pap"; break; 6154 } 6155 break; 6156 6157 default: 6158 name = "bad"; 6159 break; 6160 } 6161 6162 snprintf(buf, sizeof(buf), "%s(%#x) %#x", name, proto, type); 6163 return buf; 6164 } 6165 6166 static const char * 6167 sppp_lcp_opt_name(u_char opt) 6168 { 6169 static char buf[12]; 6170 switch (opt) { 6171 case LCP_OPT_MRU: return "mru"; 6172 case LCP_OPT_ASYNC_MAP: return "async-map"; 6173 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 6174 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 6175 case LCP_OPT_MAGIC: return "magic"; 6176 case LCP_OPT_PROTO_COMP: return "proto-comp"; 6177 case LCP_OPT_ADDR_COMP: return "addr-comp"; 6178 case LCP_OPT_SELF_DESC_PAD: return "sdpad"; 6179 case LCP_OPT_CALL_BACK: return "callback"; 6180 case LCP_OPT_COMPOUND_FRMS: return "cmpd-frms"; 6181 case LCP_OPT_MP_MRRU: return "mrru"; 6182 case LCP_OPT_MP_SSNHF: return "mp-ssnhf"; 6183 case LCP_OPT_MP_EID: return "mp-eid"; 6184 } 6185 snprintf(buf, sizeof(buf), "0x%x", opt); 6186 return buf; 6187 } 6188 6189 static const char * 6190 sppp_ipcp_opt_name(u_char opt) 6191 { 6192 static char buf[12]; 6193 switch (opt) { 6194 case IPCP_OPT_ADDRESSES: return "addresses"; 6195 case IPCP_OPT_COMPRESSION: return "compression"; 6196 case IPCP_OPT_ADDRESS: return "address"; 6197 } 6198 snprintf(buf, sizeof(buf), "0x%x", opt); 6199 return buf; 6200 } 6201 6202 #ifdef INET6 6203 static const char * 6204 sppp_ipv6cp_opt_name(u_char opt) 6205 { 6206 static char buf[12]; 6207 switch (opt) { 6208 case IPV6CP_OPT_IFID: return "ifid"; 6209 case IPV6CP_OPT_COMPRESSION: return "compression"; 6210 } 6211 snprintf(buf, sizeof(buf), "0x%x", opt); 6212 return buf; 6213 } 6214 #endif 6215 6216 static const char * 6217 sppp_state_name(int state) 6218 { 6219 switch (state) { 6220 case STATE_INITIAL: return "initial"; 6221 case STATE_STARTING: return "starting"; 6222 case STATE_CLOSED: return "closed"; 6223 case STATE_STOPPED: return "stopped"; 6224 case STATE_CLOSING: return "closing"; 6225 case STATE_STOPPING: return "stopping"; 6226 case STATE_REQ_SENT: return "req-sent"; 6227 case STATE_ACK_RCVD: return "ack-rcvd"; 6228 case STATE_ACK_SENT: return "ack-sent"; 6229 case STATE_OPENED: return "opened"; 6230 } 6231 return "illegal"; 6232 } 6233 6234 static const char * 6235 sppp_phase_name(int phase) 6236 { 6237 switch (phase) { 6238 case SPPP_PHASE_DEAD: return "dead"; 6239 case SPPP_PHASE_ESTABLISH: return "establish"; 6240 case SPPP_PHASE_TERMINATE: return "terminate"; 6241 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 6242 case SPPP_PHASE_NETWORK: return "network"; 6243 } 6244 return "illegal"; 6245 } 6246 6247 static const char * 6248 sppp_proto_name(u_short proto) 6249 { 6250 static char buf[12]; 6251 switch (proto) { 6252 case PPP_LCP: return "lcp"; 6253 case PPP_IPCP: return "ipcp"; 6254 case PPP_PAP: return "pap"; 6255 case PPP_CHAP: return "chap"; 6256 case PPP_IPV6CP: return "ipv6cp"; 6257 } 6258 snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto); 6259 return buf; 6260 } 6261 6262 static void 6263 sppp_print_bytes(const u_char *p, u_short len) 6264 { 6265 addlog(" %02x", *p++); 6266 while (--len > 0) 6267 addlog("-%02x", *p++); 6268 } 6269 6270 static void 6271 sppp_print_string(const char *p, u_short len) 6272 { 6273 u_char c; 6274 6275 while (len-- > 0) { 6276 c = *p++; 6277 /* 6278 * Print only ASCII chars directly. RFC 1994 recommends 6279 * using only them, but we don't rely on it. */ 6280 if (c < ' ' || c > '~') 6281 addlog("\\x%x", c); 6282 else 6283 addlog("%c", c); 6284 } 6285 } 6286 6287 static const char * 6288 sppp_dotted_quad(uint32_t addr) 6289 { 6290 static char s[16]; 6291 snprintf(s, sizeof(s), "%d.%d.%d.%d", 6292 (int)((addr >> 24) & 0xff), 6293 (int)((addr >> 16) & 0xff), 6294 (int)((addr >> 8) & 0xff), 6295 (int)(addr & 0xff)); 6296 return s; 6297 } 6298 6299 /* a dummy, used to drop uninteresting events */ 6300 static void 6301 sppp_null(struct sppp *unused) 6302 { 6303 /* do just nothing */ 6304 } 6305 6306 static void 6307 sppp_tls(const struct cp *cp, struct sppp *sp) 6308 { 6309 6310 /* notify lcp that is lower layer */ 6311 sp->lcp.protos |= (1 << cp->protoidx); 6312 6313 if (sp->scp[IDX_LCP].state == STATE_OPENED) 6314 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_up); 6315 } 6316 6317 static void 6318 sppp_tlf(const struct cp *cp, struct sppp *sp) 6319 { 6320 STDDCL; 6321 6322 if (debug) 6323 log(LOG_DEBUG, "%s: %s tlf\n", ifp->if_xname, cp->name); 6324 6325 /* notify lcp that is lower layer */ 6326 sp->lcp.protos &= ~(1 << cp->protoidx); 6327 6328 /* cleanup */ 6329 if (sp->scp[cp->protoidx].rcr_buf != NULL) { 6330 kmem_free(sp->scp[cp->protoidx].rcr_buf, 6331 sp->scp[cp->protoidx].rcr_blen); 6332 } 6333 6334 sp->scp[cp->protoidx].rcr_buf = NULL; 6335 sp->scp[cp->protoidx].rcr_blen = 0; 6336 sp->scp[cp->protoidx].rcr_rlen = 0; 6337 6338 sppp_lcp_check_and_close(sp); 6339 } 6340 6341 static void 6342 sppp_sca_scn(const struct cp *cp, struct sppp *sp) 6343 { 6344 STDDCL; 6345 u_char rconfid, rlen; 6346 int type; 6347 void *buf; 6348 size_t blen; 6349 6350 rconfid = sp->scp[cp->protoidx].rconfid; 6351 buf = sp->scp[cp->protoidx].rcr_buf; 6352 rlen = sp->scp[cp->protoidx].rcr_rlen; 6353 blen = sp->scp[cp->protoidx].rcr_blen; 6354 6355 sp->scp[cp->protoidx].rcr_buf = NULL; 6356 sp->scp[cp->protoidx].rcr_blen = 0; 6357 6358 switch (sp->scp[cp->protoidx].rcr_type) { 6359 case CP_RCR_ACK: 6360 type = CONF_ACK; 6361 break; 6362 case CP_RCR_REJ: 6363 type = CONF_REJ; 6364 break; 6365 case CP_RCR_NAK: 6366 type = CONF_NAK; 6367 break; 6368 default: 6369 type = -1; 6370 break; 6371 } 6372 6373 sp->scp[cp->protoidx].rcr_type = CP_RCR_NONE; 6374 6375 if (buf != NULL) { 6376 if (rlen > 0 && type != -1) { 6377 if (debug) { 6378 log(LOG_DEBUG, "%s: send %s\n", 6379 ifp->if_xname, sppp_cp_type_name(type)); 6380 } 6381 sppp_cp_send(sp, cp->proto, type, rconfid, rlen, buf); 6382 } 6383 kmem_free(buf, blen); 6384 } 6385 } 6386 6387 static void 6388 sppp_ifdown(struct sppp *sp, void *xcp __unused) 6389 { 6390 6391 SPPP_UNLOCK(sp); 6392 if_down(&sp->pp_if); 6393 IF_PURGE(&sp->pp_cpq); 6394 SPPP_LOCK(sp, RW_WRITER); 6395 } 6396 6397 static void 6398 sppp_notify_up(struct sppp *sp) 6399 { 6400 6401 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_up); 6402 } 6403 6404 static void 6405 sppp_notify_down(struct sppp *sp) 6406 { 6407 6408 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_down); 6409 } 6410 6411 static void 6412 sppp_notify_tls_wlocked(struct sppp *sp) 6413 { 6414 6415 KASSERT(SPPP_WLOCKED(sp)); 6416 6417 if (!sp->pp_tls) 6418 return; 6419 6420 SPPP_UNLOCK(sp); 6421 sp->pp_tls(sp); 6422 SPPP_LOCK(sp, RW_WRITER); 6423 } 6424 6425 static void 6426 sppp_notify_tlf_wlocked(struct sppp *sp) 6427 { 6428 6429 KASSERT(SPPP_WLOCKED(sp)); 6430 6431 if (!sp->pp_tlf) 6432 return; 6433 6434 SPPP_UNLOCK(sp); 6435 sp->pp_tlf(sp); 6436 SPPP_LOCK(sp, RW_WRITER); 6437 } 6438 6439 static void 6440 sppp_notify_con(struct sppp *sp) 6441 { 6442 6443 if (!sp->pp_con) 6444 return; 6445 6446 sp->pp_con(sp); 6447 } 6448 6449 #ifdef INET6 6450 static void 6451 sppp_notify_con_wlocked(struct sppp *sp) 6452 { 6453 6454 KASSERT(SPPP_WLOCKED(sp)); 6455 6456 SPPP_UNLOCK(sp); 6457 sppp_notify_con(sp); 6458 SPPP_LOCK(sp, RW_WRITER); 6459 6460 } 6461 #endif 6462 6463 static void 6464 sppp_notify_chg_wlocked(struct sppp *sp) 6465 { 6466 6467 KASSERT(SPPP_WLOCKED(sp)); 6468 6469 if (!sp->pp_chg) 6470 return; 6471 6472 SPPP_UNLOCK(sp); 6473 sp->pp_chg(sp, sp->pp_phase); 6474 SPPP_LOCK(sp, RW_WRITER); 6475 } 6476 6477 static void 6478 sppp_wq_work(struct work *wk, void *xsp) 6479 { 6480 struct sppp *sp; 6481 struct sppp_work *work; 6482 6483 sp = xsp; 6484 work = container_of(wk, struct sppp_work, work); 6485 atomic_cas_uint(&work->state, SPPP_WK_BUSY, SPPP_WK_FREE); 6486 6487 SPPP_LOCK(sp, RW_WRITER); 6488 work->func(sp, work->arg); 6489 SPPP_UNLOCK(sp); 6490 } 6491 6492 static struct workqueue * 6493 sppp_wq_create(struct sppp *sp, const char *xnamebuf, pri_t prio, int ipl, int flags) 6494 { 6495 struct workqueue *wq; 6496 int error; 6497 6498 error = workqueue_create(&wq, xnamebuf, sppp_wq_work, 6499 (void *)sp, prio, ipl, flags); 6500 if (error) { 6501 panic("%s: workqueue_create failed [%s, %d]\n", 6502 sp->pp_if.if_xname, xnamebuf, error); 6503 } 6504 6505 return wq; 6506 } 6507 6508 static void 6509 sppp_wq_destroy(struct sppp *sp __unused, struct workqueue *wq) 6510 { 6511 6512 workqueue_destroy(wq); 6513 } 6514 6515 static void 6516 sppp_wq_set(struct sppp_work *work, 6517 void (*func)(struct sppp *, void *), void *arg) 6518 { 6519 6520 work->func = func; 6521 work->arg = arg; 6522 } 6523 6524 static void 6525 sppp_wq_add(struct workqueue *wq, struct sppp_work *work) 6526 { 6527 6528 if (atomic_cas_uint(&work->state, SPPP_WK_FREE, SPPP_WK_BUSY) 6529 != SPPP_WK_FREE) 6530 return; 6531 6532 KASSERT(work->func != NULL); 6533 kpreempt_disable(); 6534 workqueue_enqueue(wq, &work->work, NULL); 6535 kpreempt_enable(); 6536 } 6537 static void 6538 sppp_wq_wait(struct workqueue *wq, struct sppp_work *work) 6539 { 6540 6541 atomic_swap_uint(&work->state, SPPP_WK_UNAVAIL); 6542 workqueue_wait(wq, &work->work); 6543 } 6544 6545 /* 6546 * This file is large. Tell emacs to highlight it nevertheless. 6547 * 6548 * Local Variables: 6549 * hilit-auto-highlight-maxout: 120000 6550 * End: 6551 */ 6552 6553 /* 6554 * Module glue 6555 */ 6556 MODULE(MODULE_CLASS_MISC, sppp_subr, NULL); 6557 6558 static int 6559 sppp_subr_modcmd(modcmd_t cmd, void *arg) 6560 { 6561 6562 switch (cmd) { 6563 case MODULE_CMD_INIT: 6564 case MODULE_CMD_FINI: 6565 return 0; 6566 case MODULE_CMD_STAT: 6567 case MODULE_CMD_AUTOUNLOAD: 6568 default: 6569 return ENOTTY; 6570 } 6571 } 6572
Indexes created Sat Sep 27 22:09:54 GMT 2025