if_spppsubr.c revision 1.224
1 /* $NetBSD: if_spppsubr.c,v 1.224 2021/04/26 08:37:54 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 1.224 2021/04/26 08:37:54 yamaguchi Exp $"); 45 46 #if defined(_KERNEL_OPT) 47 #include "opt_inet.h" 48 #include "opt_modular.h" 49 #include "opt_compat_netbsd.h" 50 #include "opt_net_mpsafe.h" 51 #endif 52 53 #include <sys/param.h> 54 #include <sys/proc.h> 55 #include <sys/systm.h> 56 #include <sys/kernel.h> 57 #include <sys/sockio.h> 58 #include <sys/socket.h> 59 #include <sys/syslog.h> 60 #include <sys/malloc.h> 61 #include <sys/mbuf.h> 62 #include <sys/callout.h> 63 #include <sys/md5.h> 64 #include <sys/inttypes.h> 65 #include <sys/kauth.h> 66 #include <sys/cprng.h> 67 #include <sys/module.h> 68 #include <sys/workqueue.h> 69 #include <sys/atomic.h> 70 #include <sys/compat_stub.h> 71 #include <sys/cpu.h> 72 73 #include <net/if.h> 74 #include <net/netisr.h> 75 #include <net/if_types.h> 76 #include <net/route.h> 77 #include <net/ppp_defs.h> 78 79 #include <netinet/in.h> 80 #include <netinet/in_systm.h> 81 #include <netinet/in_var.h> 82 #ifdef INET 83 #include <netinet/ip.h> 84 #include <netinet/tcp.h> 85 #endif 86 #include <net/ethertypes.h> 87 88 #ifdef INET6 89 #include <netinet6/scope6_var.h> 90 #endif 91 92 #include <net/if_sppp.h> 93 #include <net/if_spppvar.h> 94 95 #ifdef NET_MPSAFE 96 #define SPPPSUBR_MPSAFE 1 97 #endif 98 99 #define LCP_KEEPALIVE_INTERVAL 10 /* seconds between checks */ 100 #define LOOPALIVECNT 3 /* loopback detection tries */ 101 #define DEFAULT_MAXALIVECNT 3 /* max. missed alive packets */ 102 #define DEFAULT_NORECV_TIME 15 /* before we get worried */ 103 #define DEFAULT_MAX_AUTH_FAILURES 5 /* max. auth. failures */ 104 105 /* 106 * Interface flags that can be set in an ifconfig command. 107 * 108 * Setting link0 will make the link passive, i.e. it will be marked 109 * as being administrative openable, but won't be opened to begin 110 * with. Incoming calls will be answered, or subsequent calls with 111 * -link1 will cause the administrative open of the LCP layer. 112 * 113 * Setting link1 will cause the link to auto-dial only as packets 114 * arrive to be sent. 115 * 116 * Setting IFF_DEBUG will syslog the option negotiation and state 117 * transitions at level kern.debug. Note: all logs consistently look 118 * like 119 * 120 * <if-name><unit>: <proto-name> <additional info...> 121 * 122 * with <if-name><unit> being something like "bppp0", and <proto-name> 123 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. 124 */ 125 126 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 127 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 128 129 #define CONF_REQ 1 /* PPP configure request */ 130 #define CONF_ACK 2 /* PPP configure acknowledge */ 131 #define CONF_NAK 3 /* PPP configure negative ack */ 132 #define CONF_REJ 4 /* PPP configure reject */ 133 #define TERM_REQ 5 /* PPP terminate request */ 134 #define TERM_ACK 6 /* PPP terminate acknowledge */ 135 #define CODE_REJ 7 /* PPP code reject */ 136 #define PROTO_REJ 8 /* PPP protocol reject */ 137 #define ECHO_REQ 9 /* PPP echo request */ 138 #define ECHO_REPLY 10 /* PPP echo reply */ 139 #define DISC_REQ 11 /* PPP discard request */ 140 141 #define LCP_OPT_MRU 1 /* maximum receive unit */ 142 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 143 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 144 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 145 #define LCP_OPT_MAGIC 5 /* magic number */ 146 #define LCP_OPT_RESERVED 6 /* reserved */ 147 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 148 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 149 #define LCP_OPT_FCS_ALTS 9 /* FCS alternatives */ 150 #define LCP_OPT_SELF_DESC_PAD 10 /* self-describing padding */ 151 #define LCP_OPT_CALL_BACK 13 /* callback */ 152 #define LCP_OPT_COMPOUND_FRMS 15 /* compound frames */ 153 #define LCP_OPT_MP_MRRU 17 /* multilink MRRU */ 154 #define LCP_OPT_MP_SSNHF 18 /* multilink short seq. numbers */ 155 #define LCP_OPT_MP_EID 19 /* multilink endpoint discriminator */ 156 157 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 158 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol */ 159 #define IPCP_OPT_ADDRESS 3 /* local IP address */ 160 #define IPCP_OPT_PRIMDNS 129 /* primary remote dns address */ 161 #define IPCP_OPT_SECDNS 131 /* secondary remote dns address */ 162 163 #define IPCP_UPDATE_LIMIT 8 /* limit of pending IP updating job */ 164 #define IPCP_SET_ADDRS 1 /* marker for IP address setting job */ 165 #define IPCP_CLEAR_ADDRS 2 /* marker for IP address clearing job */ 166 167 #define IPV6CP_OPT_IFID 1 /* interface identifier */ 168 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 169 170 #define PAP_REQ 1 /* PAP name/password request */ 171 #define PAP_ACK 2 /* PAP acknowledge */ 172 #define PAP_NAK 3 /* PAP fail */ 173 174 #define CHAP_CHALLENGE 1 /* CHAP challenge request */ 175 #define CHAP_RESPONSE 2 /* CHAP challenge response */ 176 #define CHAP_SUCCESS 3 /* CHAP response ok */ 177 #define CHAP_FAILURE 4 /* CHAP response failed */ 178 179 #define CHAP_MD5 5 /* hash algorithm - MD5 */ 180 181 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 182 #define CISCO_UNICAST 0x0f /* Cisco unicast address */ 183 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 184 #define CISCO_ADDR_REQ 0 /* Cisco address request */ 185 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 186 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 187 188 enum { 189 STATE_INITIAL = SPPP_STATE_INITIAL, 190 STATE_STARTING = SPPP_STATE_STARTING, 191 STATE_CLOSED = SPPP_STATE_CLOSED, 192 STATE_STOPPED = SPPP_STATE_STOPPED, 193 STATE_CLOSING = SPPP_STATE_CLOSING, 194 STATE_STOPPING = SPPP_STATE_STOPPING, 195 STATE_REQ_SENT = SPPP_STATE_REQ_SENT, 196 STATE_ACK_RCVD = SPPP_STATE_ACK_RCVD, 197 STATE_ACK_SENT = SPPP_STATE_ACK_SENT, 198 STATE_OPENED = SPPP_STATE_OPENED, 199 }; 200 201 enum cp_rcr_type { 202 CP_RCR_NONE = 0, /* initial value */ 203 CP_RCR_ACK, /* RCR+ */ 204 CP_RCR_NAK, /* RCR- */ 205 CP_RCR_REJ, /* RCR- */ 206 CP_RCR_DROP, /* DROP message */ 207 CP_RCR_ERR, /* internal error */ 208 }; 209 210 struct ppp_header { 211 uint8_t address; 212 uint8_t control; 213 uint16_t protocol; 214 } __packed; 215 #define PPP_HEADER_LEN sizeof (struct ppp_header) 216 217 struct lcp_header { 218 uint8_t type; 219 uint8_t ident; 220 uint16_t len; 221 } __packed; 222 #define LCP_HEADER_LEN sizeof (struct lcp_header) 223 224 struct cisco_packet { 225 uint32_t type; 226 uint32_t par1; 227 uint32_t par2; 228 uint16_t rel; 229 uint16_t time0; 230 uint16_t time1; 231 } __packed; 232 #define CISCO_PACKET_LEN 18 233 234 /* 235 * We follow the spelling and capitalization of RFC 1661 here, to make 236 * it easier comparing with the standard. Please refer to this RFC in 237 * case you can't make sense out of these abbreviation; it will also 238 * explain the semantics related to the various events and actions. 239 */ 240 struct cp { 241 u_short proto; /* PPP control protocol number */ 242 u_char protoidx; /* index into state table in struct sppp */ 243 u_char flags; 244 #define CP_LCP 0x01 /* this is the LCP */ 245 #define CP_AUTH 0x02 /* this is an authentication protocol */ 246 #define CP_NCP 0x04 /* this is a NCP */ 247 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 248 const char *name; /* name of this control protocol */ 249 /* event handlers */ 250 void (*Up)(struct sppp *, void *); 251 void (*Down)(struct sppp *, void *); 252 void (*Open)(struct sppp *, void *); 253 void (*Close)(struct sppp *, void *); 254 void (*TO)(struct sppp *, void *); 255 /* actions */ 256 void (*tlu)(struct sppp *); 257 void (*tld)(struct sppp *); 258 void (*tls)(const struct cp *, struct sppp *); 259 void (*tlf)(const struct cp *, struct sppp *); 260 void (*scr)(struct sppp *); 261 void (*scan)(const struct cp *, struct sppp *); 262 263 /* message parser */ 264 enum cp_rcr_type 265 (*parse_confreq)(struct sppp *, struct lcp_header *, int, 266 uint8_t **, size_t *, size_t *); 267 void (*parse_confrej)(struct sppp *, struct lcp_header *, int); 268 void (*parse_confnak)(struct sppp *, struct lcp_header *, int); 269 }; 270 271 enum auth_role { 272 SPPP_AUTH_NOROLE = 0, 273 SPPP_AUTH_SERV = __BIT(0), 274 SPPP_AUTH_PEER = __BIT(1), 275 }; 276 277 static struct sppp *spppq; 278 static kmutex_t *spppq_lock = NULL; 279 static callout_t keepalive_ch; 280 281 #define SPPPQ_LOCK() if (spppq_lock) \ 282 mutex_enter(spppq_lock); 283 #define SPPPQ_UNLOCK() if (spppq_lock) \ 284 mutex_exit(spppq_lock); 285 286 #define SPPP_LOCK(_sp, _op) rw_enter(&(_sp)->pp_lock, (_op)) 287 #define SPPP_UNLOCK(_sp) rw_exit(&(_sp)->pp_lock) 288 #define SPPP_WLOCKED(_sp) rw_write_held(&(_sp)->pp_lock) 289 #define SPPP_UPGRADE(_sp) do{ \ 290 SPPP_UNLOCK(_sp); \ 291 SPPP_LOCK(_sp, RW_WRITER); \ 292 }while (0) 293 #define SPPP_DOWNGRADE(_sp) rw_downgrade(&(_sp)->pp_lock) 294 #define SPPP_WQ_SET(_wk, _func, _arg) \ 295 sppp_wq_set((_wk), (_func), __UNCONST((_arg))) 296 297 #ifdef INET 298 #ifndef SPPPSUBR_MPSAFE 299 /* 300 * The following disgusting hack gets around the problem that IP TOS 301 * can't be set yet. We want to put "interactive" traffic on a high 302 * priority queue. To decide if traffic is interactive, we check that 303 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 304 * 305 * XXX is this really still necessary? - joerg - 306 */ 307 static u_short interactive_ports[8] = { 308 0, 513, 0, 0, 309 0, 21, 0, 23, 310 }; 311 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 312 #endif /* SPPPSUBR_MPSAFE */ 313 #endif 314 315 /* almost every function needs these */ 316 #define STDDCL \ 317 struct ifnet *ifp = &sp->pp_if; \ 318 int debug = ifp->if_flags & IFF_DEBUG 319 320 static int sppp_output(struct ifnet *, struct mbuf *, 321 const struct sockaddr *, const struct rtentry *); 322 323 static void sppp_cisco_send(struct sppp *, int, int32_t, int32_t); 324 static void sppp_cisco_input(struct sppp *, struct mbuf *); 325 326 static void sppp_cp_init(const struct cp *, struct sppp *); 327 static void sppp_cp_fini(const struct cp *, struct sppp *); 328 static void sppp_cp_input(const struct cp *, struct sppp *, 329 struct mbuf *); 330 static void sppp_cp_input(const struct cp *, struct sppp *, 331 struct mbuf *); 332 static void sppp_cp_send(struct sppp *, u_short, u_char, 333 u_char, u_short, void *); 334 /* static void sppp_cp_timeout(void *arg); */ 335 static void sppp_cp_change_state(const struct cp *, struct sppp *, int); 336 static struct workqueue * 337 sppp_wq_create(struct sppp *, const char *, pri_t, int, int); 338 static void sppp_wq_destroy(struct sppp *, struct workqueue *); 339 static void sppp_wq_set(struct sppp_work *, 340 void (*)(struct sppp *, void *), void *); 341 static void sppp_wq_add(struct workqueue *, struct sppp_work *); 342 static void sppp_wq_wait(struct workqueue *, struct sppp_work *); 343 static void sppp_cp_to_lcp(void *); 344 static void sppp_cp_to_ipcp(void *); 345 static void sppp_cp_to_ipv6cp(void *); 346 static void sppp_auth_send(const struct cp *, struct sppp *, 347 unsigned int, unsigned int, ...); 348 static int sppp_auth_role(const struct cp *, struct sppp *); 349 static void sppp_auth_to_event(struct sppp *, void *); 350 static void sppp_auth_sca_scn(const struct cp *, struct sppp *); 351 352 static void sppp_up_event(struct sppp *, void *); 353 static void sppp_down_event(struct sppp *, void *); 354 static void sppp_open_event(struct sppp *, void *); 355 static void sppp_close_event(struct sppp *, void *); 356 static void sppp_to_event(struct sppp *, void *); 357 static void sppp_rcr_event(struct sppp *, void *); 358 static void sppp_rca_event(struct sppp *, void *); 359 static void sppp_rcn_event(struct sppp *, void *); 360 static void sppp_rtr_event(struct sppp *, void *); 361 static void sppp_rta_event(struct sppp *, void *); 362 static void sppp_rxj_event(struct sppp *, void *); 363 364 static void sppp_null(struct sppp *); 365 static void sppp_tls(const struct cp *, struct sppp *); 366 static void sppp_tlf(const struct cp *, struct sppp *); 367 static void sppp_sca_scn(const struct cp *, struct sppp *); 368 static void sppp_ifdown(struct sppp *, void *); 369 370 static void sppp_lcp_init(struct sppp *); 371 static void sppp_lcp_up(struct sppp *, void *); 372 static void sppp_lcp_down(struct sppp *, void *); 373 static void sppp_lcp_open(struct sppp *, void *); 374 static enum cp_rcr_type 375 sppp_lcp_confreq(struct sppp *, struct lcp_header *, int, 376 uint8_t **, size_t *, size_t *); 377 static void sppp_lcp_confrej(struct sppp *, struct lcp_header *, int); 378 static void sppp_lcp_confnak(struct sppp *, struct lcp_header *, int); 379 static void sppp_lcp_tlu(struct sppp *); 380 static void sppp_lcp_tld(struct sppp *); 381 static void sppp_lcp_tls(const struct cp *, struct sppp *); 382 static void sppp_lcp_tlf(const struct cp *, struct sppp *); 383 static void sppp_lcp_scr(struct sppp *); 384 static void sppp_lcp_check_and_close(struct sppp *); 385 static int sppp_cp_check(struct sppp *, u_char); 386 387 static void sppp_ipcp_init(struct sppp *); 388 static void sppp_ipcp_open(struct sppp *, void *); 389 static void sppp_ipcp_close(struct sppp *, void *); 390 static enum cp_rcr_type 391 sppp_ipcp_confreq(struct sppp *, struct lcp_header *, int, 392 uint8_t **, size_t *, size_t *); 393 static void sppp_ipcp_confrej(struct sppp *, struct lcp_header *, int); 394 static void sppp_ipcp_confnak(struct sppp *, struct lcp_header *, int); 395 static void sppp_ipcp_tlu(struct sppp *); 396 static void sppp_ipcp_scr(struct sppp *); 397 398 static void sppp_ipv6cp_init(struct sppp *); 399 static void sppp_ipv6cp_open(struct sppp *, void *); 400 static enum cp_rcr_type 401 sppp_ipv6cp_confreq(struct sppp *, struct lcp_header *, int, 402 uint8_t **, size_t *, size_t *); 403 static void sppp_ipv6cp_confrej(struct sppp *, struct lcp_header *, int); 404 static void sppp_ipv6cp_confnak(struct sppp *, struct lcp_header *, int); 405 static void sppp_ipv6cp_tlu(struct sppp *); 406 static void sppp_ipv6cp_scr(struct sppp *); 407 408 static void sppp_pap_input(struct sppp *, struct mbuf *); 409 static void sppp_pap_init(struct sppp *); 410 static void sppp_pap_tlu(struct sppp *); 411 static void sppp_pap_scr(struct sppp *); 412 static void sppp_pap_scr(struct sppp *); 413 414 static void sppp_chap_input(struct sppp *, struct mbuf *); 415 static void sppp_chap_init(struct sppp *); 416 static void sppp_chap_open(struct sppp *, void *); 417 static void sppp_chap_tlu(struct sppp *); 418 static void sppp_chap_scr(struct sppp *); 419 static void sppp_chap_rcv_challenge_event(struct sppp *, void *); 420 421 static const char *sppp_auth_type_name(u_short, u_char); 422 static const char *sppp_cp_type_name(u_char); 423 static const char *sppp_dotted_quad(uint32_t); 424 static const char *sppp_ipcp_opt_name(u_char); 425 #ifdef INET6 426 static const char *sppp_ipv6cp_opt_name(u_char); 427 #endif 428 static const char *sppp_lcp_opt_name(u_char); 429 static const char *sppp_phase_name(int); 430 static const char *sppp_proto_name(u_short); 431 static const char *sppp_state_name(int); 432 static int sppp_params(struct sppp *, u_long, void *); 433 #ifdef INET 434 static void sppp_get_ip_addrs(struct sppp *, uint32_t *, uint32_t *, uint32_t *); 435 static void sppp_set_ip_addrs(struct sppp *); 436 static void sppp_clear_ip_addrs(struct sppp *); 437 #endif 438 static void sppp_keepalive(void *); 439 static void sppp_phase_network(struct sppp *); 440 static void sppp_print_bytes(const u_char *, u_short); 441 static void sppp_print_string(const char *, u_short); 442 #ifdef INET6 443 static void sppp_get_ip6_addrs(struct sppp *, struct in6_addr *, 444 struct in6_addr *, struct in6_addr *); 445 #ifdef IPV6CP_MYIFID_DYN 446 static void sppp_set_ip6_addr(struct sppp *, const struct in6_addr *); 447 static void sppp_gen_ip6_addr(struct sppp *, const struct in6_addr *); 448 #endif 449 static void sppp_suggest_ip6_addr(struct sppp *, struct in6_addr *); 450 #endif 451 452 static void sppp_notify_up(struct sppp *); 453 static void sppp_notify_down(struct sppp *); 454 static void sppp_notify_tls_wlocked(struct sppp *); 455 static void sppp_notify_tlf_wlocked(struct sppp *); 456 #ifdef INET6 457 static void sppp_notify_con_wlocked(struct sppp *); 458 #endif 459 static void sppp_notify_con(struct sppp *); 460 461 static void sppp_notify_chg_wlocked(struct sppp *); 462 463 /* our control protocol descriptors */ 464 static const struct cp lcp = { 465 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 466 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, 467 sppp_close_event, sppp_to_event, 468 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, 469 sppp_lcp_tlf, sppp_lcp_scr, sppp_sca_scn, 470 sppp_lcp_confreq, sppp_lcp_confrej, sppp_lcp_confnak 471 }; 472 473 static const struct cp ipcp = { 474 PPP_IPCP, IDX_IPCP, 475 #ifdef INET 476 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 477 #else 478 0, 479 #endif 480 "ipcp", 481 sppp_up_event, sppp_down_event, sppp_ipcp_open, 482 sppp_ipcp_close, sppp_to_event, 483 sppp_ipcp_tlu, sppp_null, sppp_tls, 484 sppp_tlf, sppp_ipcp_scr, sppp_sca_scn, 485 sppp_ipcp_confreq, sppp_ipcp_confrej, sppp_ipcp_confnak, 486 }; 487 488 static const struct cp ipv6cp = { 489 PPP_IPV6CP, IDX_IPV6CP, 490 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 491 CP_NCP, 492 #else 493 0, 494 #endif 495 "ipv6cp", 496 sppp_up_event, sppp_down_event, sppp_ipv6cp_open, 497 sppp_close_event, sppp_to_event, 498 sppp_ipv6cp_tlu, sppp_null, sppp_tls, 499 sppp_tlf, sppp_ipv6cp_scr, sppp_sca_scn, 500 sppp_ipv6cp_confreq, sppp_ipv6cp_confrej, sppp_ipv6cp_confnak, 501 }; 502 503 static const struct cp pap = { 504 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 505 sppp_up_event, sppp_down_event, sppp_open_event, 506 sppp_close_event, sppp_to_event, 507 sppp_pap_tlu, sppp_null, sppp_tls, sppp_tlf, 508 sppp_pap_scr, sppp_auth_sca_scn, 509 NULL, NULL, NULL 510 }; 511 512 static const struct cp chap = { 513 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 514 sppp_up_event, sppp_down_event, sppp_chap_open, 515 sppp_close_event, sppp_auth_to_event, 516 sppp_chap_tlu, sppp_null, sppp_tls, sppp_tlf, 517 sppp_chap_scr, sppp_auth_sca_scn, 518 NULL, NULL, NULL 519 }; 520 521 static const struct cp *cps[IDX_COUNT] = { 522 &lcp, /* IDX_LCP */ 523 &ipcp, /* IDX_IPCP */ 524 &ipv6cp, /* IDX_IPV6CP */ 525 &pap, /* IDX_PAP */ 526 &chap, /* IDX_CHAP */ 527 }; 528 529 static void 530 sppp_change_phase(struct sppp *sp, int phase) 531 { 532 STDDCL; 533 534 KASSERT(SPPP_WLOCKED(sp)); 535 536 if (sp->pp_phase == phase) 537 return; 538 539 sp->pp_phase = phase; 540 541 if (phase == SPPP_PHASE_NETWORK) 542 if_link_state_change(ifp, LINK_STATE_UP); 543 else 544 if_link_state_change(ifp, LINK_STATE_DOWN); 545 546 if (debug) 547 { 548 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 549 sppp_phase_name(sp->pp_phase)); 550 } 551 } 552 553 /* 554 * Exported functions, comprising our interface to the lower layer. 555 */ 556 557 /* 558 * Process the received packet. 559 */ 560 void 561 sppp_input(struct ifnet *ifp, struct mbuf *m) 562 { 563 struct ppp_header *h = NULL; 564 pktqueue_t *pktq = NULL; 565 struct ifqueue *inq = NULL; 566 uint16_t protocol; 567 struct sppp *sp = (struct sppp *)ifp; 568 int debug = ifp->if_flags & IFF_DEBUG; 569 int isr = 0; 570 571 SPPP_LOCK(sp, RW_READER); 572 573 if (ifp->if_flags & IFF_UP) { 574 /* Count received bytes, add hardware framing */ 575 if_statadd(ifp, if_ibytes, m->m_pkthdr.len + sp->pp_framebytes); 576 /* Note time of last receive */ 577 sp->pp_last_receive = time_uptime; 578 } 579 580 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 581 /* Too small packet, drop it. */ 582 if (debug) 583 log(LOG_DEBUG, 584 "%s: input packet is too small, %d bytes\n", 585 ifp->if_xname, m->m_pkthdr.len); 586 drop: 587 if_statadd2(ifp, if_ierrors, 1, if_iqdrops, 1); 588 m_freem(m); 589 SPPP_UNLOCK(sp); 590 return; 591 } 592 593 if (sp->pp_flags & PP_NOFRAMING) { 594 memcpy(&protocol, mtod(m, void *), 2); 595 protocol = ntohs(protocol); 596 m_adj(m, 2); 597 } else { 598 599 /* Get PPP header. */ 600 h = mtod(m, struct ppp_header *); 601 m_adj(m, PPP_HEADER_LEN); 602 603 switch (h->address) { 604 case PPP_ALLSTATIONS: 605 if (h->control != PPP_UI) 606 goto invalid; 607 if (sp->pp_flags & PP_CISCO) { 608 if (debug) 609 log(LOG_DEBUG, 610 "%s: PPP packet in Cisco mode " 611 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 612 ifp->if_xname, 613 h->address, h->control, ntohs(h->protocol)); 614 goto drop; 615 } 616 break; 617 case CISCO_MULTICAST: 618 case CISCO_UNICAST: 619 /* Don't check the control field here (RFC 1547). */ 620 if (! (sp->pp_flags & PP_CISCO)) { 621 if (debug) 622 log(LOG_DEBUG, 623 "%s: Cisco packet in PPP mode " 624 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 625 ifp->if_xname, 626 h->address, h->control, ntohs(h->protocol)); 627 goto drop; 628 } 629 switch (ntohs(h->protocol)) { 630 default: 631 if_statinc(ifp, if_noproto); 632 goto invalid; 633 case CISCO_KEEPALIVE: 634 SPPP_UNLOCK(sp); 635 sppp_cisco_input((struct sppp *) ifp, m); 636 m_freem(m); 637 return; 638 #ifdef INET 639 case ETHERTYPE_IP: 640 pktq = ip_pktq; 641 break; 642 #endif 643 #ifdef INET6 644 case ETHERTYPE_IPV6: 645 pktq = ip6_pktq; 646 break; 647 #endif 648 } 649 goto queue_pkt; 650 default: /* Invalid PPP packet. */ 651 invalid: 652 if (debug) 653 log(LOG_DEBUG, 654 "%s: invalid input packet " 655 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 656 ifp->if_xname, 657 h->address, h->control, ntohs(h->protocol)); 658 goto drop; 659 } 660 protocol = ntohs(h->protocol); 661 } 662 663 switch (protocol) { 664 default: 665 if (sp->scp[IDX_LCP].state == STATE_OPENED) { 666 uint16_t prot = htons(protocol); 667 668 SPPP_UPGRADE(sp); 669 sppp_cp_send(sp, PPP_LCP, PROTO_REJ, 670 ++sp->scp[IDX_LCP].seq, m->m_pkthdr.len + 2, 671 &prot); 672 SPPP_DOWNGRADE(sp); 673 } 674 if (debug) 675 log(LOG_DEBUG, 676 "%s: invalid input protocol " 677 "<proto=0x%x>\n", ifp->if_xname, ntohs(protocol)); 678 if_statinc(ifp, if_noproto); 679 goto drop; 680 case PPP_LCP: 681 SPPP_UNLOCK(sp); 682 sppp_cp_input(&lcp, sp, m); 683 m_freem(m); 684 return; 685 case PPP_PAP: 686 SPPP_UNLOCK(sp); 687 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 688 sppp_pap_input(sp, m); 689 } 690 m_freem(m); 691 return; 692 case PPP_CHAP: 693 SPPP_UNLOCK(sp); 694 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 695 sppp_chap_input(sp, m); 696 } 697 m_freem(m); 698 return; 699 #ifdef INET 700 case PPP_IPCP: 701 SPPP_UNLOCK(sp); 702 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 703 sppp_cp_input(&ipcp, sp, m); 704 } 705 m_freem(m); 706 return; 707 case PPP_IP: 708 if (sp->scp[IDX_IPCP].state == STATE_OPENED) { 709 sp->pp_last_activity = time_uptime; 710 pktq = ip_pktq; 711 } 712 break; 713 #endif 714 #ifdef INET6 715 case PPP_IPV6CP: 716 SPPP_UNLOCK(sp); 717 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 718 sppp_cp_input(&ipv6cp, sp, m); 719 } 720 m_freem(m); 721 return; 722 723 case PPP_IPV6: 724 if (sp->scp[IDX_IPV6CP].state == STATE_OPENED) { 725 sp->pp_last_activity = time_uptime; 726 pktq = ip6_pktq; 727 } 728 break; 729 #endif 730 } 731 732 queue_pkt: 733 if ((ifp->if_flags & IFF_UP) == 0 || (!inq && !pktq)) { 734 goto drop; 735 } 736 737 /* Check queue. */ 738 if (__predict_true(pktq)) { 739 if (__predict_false(!pktq_enqueue(pktq, m, 0))) { 740 goto drop; 741 } 742 SPPP_UNLOCK(sp); 743 return; 744 } 745 746 SPPP_UNLOCK(sp); 747 748 IFQ_LOCK(inq); 749 if (IF_QFULL(inq)) { 750 /* Queue overflow. */ 751 IF_DROP(inq); 752 IFQ_UNLOCK(inq); 753 if (debug) 754 log(LOG_DEBUG, "%s: protocol queue overflow\n", 755 ifp->if_xname); 756 757 SPPP_LOCK(sp, RW_READER); 758 goto drop; 759 } 760 IF_ENQUEUE(inq, m); 761 IFQ_UNLOCK(inq); 762 schednetisr(isr); 763 } 764 765 /* 766 * Enqueue transmit packet. 767 */ 768 static int 769 sppp_output(struct ifnet *ifp, struct mbuf *m, 770 const struct sockaddr *dst, const struct rtentry *rt) 771 { 772 struct sppp *sp = (struct sppp *) ifp; 773 struct ppp_header *h = NULL; 774 #ifndef SPPPSUBR_MPSAFE 775 struct ifqueue *ifq = NULL; /* XXX */ 776 #endif 777 int s, error = 0; 778 uint16_t protocol; 779 size_t pktlen; 780 781 s = splnet(); 782 SPPP_LOCK(sp, RW_READER); 783 784 sp->pp_last_activity = time_uptime; 785 786 if ((ifp->if_flags & IFF_UP) == 0 || 787 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 788 SPPP_UNLOCK(sp); 789 splx(s); 790 791 m_freem(m); 792 793 return (ENETDOWN); 794 } 795 796 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 797 /* 798 * Interface is not yet running, but auto-dial. Need 799 * to start LCP for it. 800 */ 801 ifp->if_flags |= IFF_RUNNING; 802 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 803 } 804 805 /* 806 * If the queueing discipline needs packet classification, 807 * do it before prepending link headers. 808 */ 809 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family); 810 811 #ifdef INET 812 if (dst->sa_family == AF_INET) { 813 struct ip *ip = NULL; 814 #ifndef SPPPSUBR_MPSAFE 815 struct tcphdr *th = NULL; 816 #endif 817 818 if (m->m_len >= sizeof(struct ip)) { 819 ip = mtod(m, struct ip *); 820 #ifndef SPPPSUBR_MPSAFE 821 if (ip->ip_p == IPPROTO_TCP && 822 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + 823 sizeof(struct tcphdr)) { 824 th = (struct tcphdr *) 825 ((char *)ip + (ip->ip_hl << 2)); 826 } 827 #endif 828 } else 829 ip = NULL; 830 831 /* 832 * When using dynamic local IP address assignment by using 833 * 0.0.0.0 as a local address, the first TCP session will 834 * not connect because the local TCP checksum is computed 835 * using 0.0.0.0 which will later become our real IP address 836 * so the TCP checksum computed at the remote end will 837 * become invalid. So we 838 * - don't let packets with src ip addr 0 thru 839 * - we flag TCP packets with src ip 0 as an error 840 */ 841 if (ip && ip->ip_src.s_addr == INADDR_ANY) { 842 uint8_t proto = ip->ip_p; 843 844 SPPP_UNLOCK(sp); 845 splx(s); 846 847 m_freem(m); 848 if (proto == IPPROTO_TCP) 849 return (EADDRNOTAVAIL); 850 else 851 return (0); 852 } 853 854 #ifndef SPPPSUBR_MPSAFE 855 /* 856 * Put low delay, telnet, rlogin and ftp control packets 857 * in front of the queue. 858 */ 859 if (!IF_QFULL(&sp->pp_fastq) && 860 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 861 (th && (INTERACTIVE(ntohs(th->th_sport)) || 862 INTERACTIVE(ntohs(th->th_dport)))))) 863 ifq = &sp->pp_fastq; 864 #endif /* !SPPPSUBR_MPSAFE */ 865 } 866 #endif 867 868 #ifdef INET6 869 if (dst->sa_family == AF_INET6) { 870 /* XXX do something tricky here? */ 871 } 872 #endif 873 874 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 875 /* 876 * Prepend general data packet PPP header. For now, IP only. 877 */ 878 M_PREPEND(m, PPP_HEADER_LEN, M_DONTWAIT); 879 if (! m) { 880 if (ifp->if_flags & IFF_DEBUG) 881 log(LOG_DEBUG, "%s: no memory for transmit header\n", 882 ifp->if_xname); 883 if_statinc(ifp, if_oerrors); 884 SPPP_UNLOCK(sp); 885 splx(s); 886 return (ENOBUFS); 887 } 888 /* 889 * May want to check size of packet 890 * (albeit due to the implementation it's always enough) 891 */ 892 h = mtod(m, struct ppp_header *); 893 if (sp->pp_flags & PP_CISCO) { 894 h->address = CISCO_UNICAST; /* unicast address */ 895 h->control = 0; 896 } else { 897 h->address = PPP_ALLSTATIONS; /* broadcast address */ 898 h->control = PPP_UI; /* Unnumbered Info */ 899 } 900 } 901 902 switch (dst->sa_family) { 903 #ifdef INET 904 case AF_INET: /* Internet Protocol */ 905 if (sp->pp_flags & PP_CISCO) 906 protocol = htons(ETHERTYPE_IP); 907 else { 908 /* 909 * Don't choke with an ENETDOWN early. It's 910 * possible that we just started dialing out, 911 * so don't drop the packet immediately. If 912 * we notice that we run out of buffer space 913 * below, we will however remember that we are 914 * not ready to carry IP packets, and return 915 * ENETDOWN, as opposed to ENOBUFS. 916 */ 917 protocol = htons(PPP_IP); 918 if (sp->scp[IDX_IPCP].state != STATE_OPENED) 919 error = ENETDOWN; 920 } 921 break; 922 #endif 923 #ifdef INET6 924 case AF_INET6: /* Internet Protocol version 6 */ 925 if (sp->pp_flags & PP_CISCO) 926 protocol = htons(ETHERTYPE_IPV6); 927 else { 928 /* 929 * Don't choke with an ENETDOWN early. It's 930 * possible that we just started dialing out, 931 * so don't drop the packet immediately. If 932 * we notice that we run out of buffer space 933 * below, we will however remember that we are 934 * not ready to carry IP packets, and return 935 * ENETDOWN, as opposed to ENOBUFS. 936 */ 937 protocol = htons(PPP_IPV6); 938 if (sp->scp[IDX_IPV6CP].state != STATE_OPENED) 939 error = ENETDOWN; 940 } 941 break; 942 #endif 943 default: 944 m_freem(m); 945 if_statinc(ifp, if_oerrors); 946 SPPP_UNLOCK(sp); 947 splx(s); 948 return (EAFNOSUPPORT); 949 } 950 951 if (sp->pp_flags & PP_NOFRAMING) { 952 M_PREPEND(m, 2, M_DONTWAIT); 953 if (m == NULL) { 954 if (ifp->if_flags & IFF_DEBUG) 955 log(LOG_DEBUG, "%s: no memory for transmit header\n", 956 ifp->if_xname); 957 if_statinc(ifp, if_oerrors); 958 SPPP_UNLOCK(sp); 959 splx(s); 960 return (ENOBUFS); 961 } 962 *mtod(m, uint16_t *) = protocol; 963 } else { 964 h->protocol = protocol; 965 } 966 967 pktlen = m->m_pkthdr.len; 968 #ifdef SPPPSUBR_MPSAFE 969 SPPP_UNLOCK(sp); 970 error = if_transmit_lock(ifp, m); 971 SPPP_LOCK(sp, RW_READER); 972 if (error == 0) 973 if_statadd(ifp, if_obytes, pktlen + sp->pp_framebytes); 974 #else /* !SPPPSUBR_MPSAFE */ 975 error = ifq_enqueue2(ifp, ifq, m); 976 977 if (error == 0) { 978 /* 979 * Count output packets and bytes. 980 * The packet length includes header + additional hardware 981 * framing according to RFC 1333. 982 */ 983 if (!(ifp->if_flags & IFF_OACTIVE)) { 984 SPPP_UNLOCK(sp); 985 if_start_lock(ifp); 986 SPPP_LOCK(sp, RW_READER); 987 } 988 if_statadd(ifp, if_obytes, pktlen + sp->pp_framebytes); 989 } 990 #endif /* !SPPPSUBR_MPSAFE */ 991 SPPP_UNLOCK(sp); 992 splx(s); 993 return error; 994 } 995 996 void 997 sppp_attach(struct ifnet *ifp) 998 { 999 struct sppp *sp = (struct sppp *) ifp; 1000 char xnamebuf[MAXCOMLEN]; 1001 1002 /* Initialize keepalive handler. */ 1003 if (! spppq) { 1004 callout_init(&keepalive_ch, CALLOUT_MPSAFE); 1005 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 1006 } 1007 1008 if (! spppq_lock) 1009 spppq_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_SOFTNET); 1010 1011 sp->pp_if.if_type = IFT_PPP; 1012 sp->pp_if.if_output = sppp_output; 1013 sp->pp_fastq.ifq_maxlen = 32; 1014 sp->pp_cpq.ifq_maxlen = 20; 1015 sp->pp_loopcnt = 0; 1016 sp->pp_alivecnt = 0; 1017 sp->pp_last_activity = 0; 1018 sp->pp_last_receive = 0; 1019 sp->pp_maxalive = DEFAULT_MAXALIVECNT; 1020 sp->pp_max_noreceive = DEFAULT_NORECV_TIME; 1021 sp->pp_idle_timeout = 0; 1022 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 1023 sp->pp_phase = SPPP_PHASE_DEAD; 1024 sp->pp_up = sppp_notify_up; 1025 sp->pp_down = sppp_notify_down; 1026 sppp_wq_set(&sp->work_ifdown, sppp_ifdown, NULL); 1027 memset(sp->scp, 0, sizeof(sp->scp)); 1028 rw_init(&sp->pp_lock); 1029 1030 if_alloc_sadl(ifp); 1031 1032 /* Lets not beat about the bush, we know we're down. */ 1033 ifp->if_link_state = LINK_STATE_DOWN; 1034 1035 snprintf(xnamebuf, sizeof(xnamebuf), "%s.wq_cp", ifp->if_xname); 1036 sp->wq_cp = sppp_wq_create(sp, xnamebuf, 1037 PRI_SOFTNET, IPL_SOFTNET, WQ_MPSAFE); 1038 1039 memset(&sp->myauth, 0, sizeof sp->myauth); 1040 memset(&sp->hisauth, 0, sizeof sp->hisauth); 1041 SPPP_LOCK(sp, RW_WRITER); 1042 sppp_lcp_init(sp); 1043 sppp_ipcp_init(sp); 1044 sppp_ipv6cp_init(sp); 1045 sppp_pap_init(sp); 1046 sppp_chap_init(sp); 1047 SPPP_UNLOCK(sp); 1048 1049 SPPPQ_LOCK(); 1050 /* Insert new entry into the keepalive list. */ 1051 sp->pp_next = spppq; 1052 spppq = sp; 1053 SPPPQ_UNLOCK(); 1054 } 1055 1056 void 1057 sppp_detach(struct ifnet *ifp) 1058 { 1059 struct sppp **q, *p, *sp = (struct sppp *) ifp; 1060 1061 /* Remove the entry from the keepalive list. */ 1062 SPPPQ_LOCK(); 1063 for (q = &spppq; (p = *q); q = &p->pp_next) 1064 if (p == sp) { 1065 *q = p->pp_next; 1066 break; 1067 } 1068 SPPPQ_UNLOCK(); 1069 1070 if (! spppq) { 1071 /* Stop keepalive handler. */ 1072 callout_stop(&keepalive_ch); 1073 mutex_obj_free(spppq_lock); 1074 spppq_lock = NULL; 1075 } 1076 1077 sppp_cp_fini(&lcp, sp); 1078 sppp_cp_fini(&ipcp, sp); 1079 sppp_cp_fini(&pap, sp); 1080 sppp_cp_fini(&chap, sp); 1081 #ifdef INET6 1082 sppp_cp_fini(&ipv6cp, sp); 1083 #endif 1084 sppp_wq_destroy(sp, sp->wq_cp); 1085 1086 /* free authentication info */ 1087 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 1088 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 1089 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 1090 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 1091 rw_destroy(&sp->pp_lock); 1092 } 1093 1094 /* 1095 * Flush the interface output queue. 1096 */ 1097 void 1098 sppp_flush(struct ifnet *ifp) 1099 { 1100 struct sppp *sp = (struct sppp *) ifp; 1101 1102 SPPP_LOCK(sp, RW_WRITER); 1103 IFQ_PURGE(&sp->pp_if.if_snd); 1104 IF_PURGE(&sp->pp_fastq); 1105 IF_PURGE(&sp->pp_cpq); 1106 SPPP_UNLOCK(sp); 1107 } 1108 1109 /* 1110 * Check if the output queue is empty. 1111 */ 1112 int 1113 sppp_isempty(struct ifnet *ifp) 1114 { 1115 struct sppp *sp = (struct sppp *) ifp; 1116 int empty, s; 1117 1118 s = splnet(); 1119 SPPP_LOCK(sp, RW_READER); 1120 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1121 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1122 SPPP_UNLOCK(sp); 1123 splx(s); 1124 return (empty); 1125 } 1126 1127 /* 1128 * Get next packet to send. 1129 */ 1130 struct mbuf * 1131 sppp_dequeue(struct ifnet *ifp) 1132 { 1133 struct sppp *sp = (struct sppp *) ifp; 1134 struct mbuf *m; 1135 int s; 1136 1137 s = splnet(); 1138 SPPP_LOCK(sp, RW_WRITER); 1139 /* 1140 * Process only the control protocol queue until we have at 1141 * least one NCP open. 1142 * 1143 * Do always serve all three queues in Cisco mode. 1144 */ 1145 IF_DEQUEUE(&sp->pp_cpq, m); 1146 if (m == NULL && 1147 (sppp_cp_check(sp, CP_NCP) || (sp->pp_flags & PP_CISCO) != 0)) { 1148 IF_DEQUEUE(&sp->pp_fastq, m); 1149 if (m == NULL) 1150 IFQ_DEQUEUE(&sp->pp_if.if_snd, m); 1151 } 1152 SPPP_UNLOCK(sp); 1153 splx(s); 1154 return m; 1155 } 1156 1157 /* 1158 * Process an ioctl request. Called on low priority level. 1159 */ 1160 int 1161 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1162 { 1163 struct lwp *l = curlwp; /* XXX */ 1164 struct ifreq *ifr = (struct ifreq *) data; 1165 struct ifaddr *ifa = (struct ifaddr *) data; 1166 struct sppp *sp = (struct sppp *) ifp; 1167 int s, error=0, going_up, going_down; 1168 u_short newmode; 1169 u_long lcp_mru; 1170 1171 s = splnet(); 1172 switch (cmd) { 1173 case SIOCINITIFADDR: 1174 ifa->ifa_rtrequest = p2p_rtrequest; 1175 break; 1176 1177 case SIOCSIFFLAGS: 1178 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1179 break; 1180 1181 SPPP_LOCK(sp, RW_WRITER); 1182 going_up = ifp->if_flags & IFF_UP && 1183 (ifp->if_flags & IFF_RUNNING) == 0; 1184 going_down = (ifp->if_flags & IFF_UP) == 0 && 1185 ifp->if_flags & IFF_RUNNING; 1186 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1187 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1188 /* sanity */ 1189 newmode = IFF_PASSIVE; 1190 ifp->if_flags &= ~IFF_AUTO; 1191 } 1192 1193 if (going_up || going_down) { 1194 sp->lcp.reestablish = false; 1195 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 1196 } 1197 if (going_up && newmode == 0) { 1198 /* neither auto-dial nor passive */ 1199 ifp->if_flags |= IFF_RUNNING; 1200 if (!(sp->pp_flags & PP_CISCO)) { 1201 sppp_wq_add(sp->wq_cp, 1202 &sp->scp[IDX_LCP].work_open); 1203 } 1204 } else if (going_down) { 1205 SPPP_UNLOCK(sp); 1206 sppp_flush(ifp); 1207 SPPP_LOCK(sp, RW_WRITER); 1208 1209 ifp->if_flags &= ~IFF_RUNNING; 1210 } 1211 SPPP_UNLOCK(sp); 1212 break; 1213 1214 case SIOCSIFMTU: 1215 if (ifr->ifr_mtu < PPP_MINMRU || 1216 ifr->ifr_mtu > PP_MTU) { 1217 error = EINVAL; 1218 break; 1219 } 1220 1221 error = ifioctl_common(ifp, cmd, data); 1222 if (error == ENETRESET) 1223 error = 0; 1224 1225 SPPP_LOCK(sp, RW_WRITER); 1226 lcp_mru = sp->lcp.mru; 1227 if (ifp->if_mtu < PP_MTU) { 1228 sp->lcp.mru = ifp->if_mtu; 1229 } else { 1230 sp->lcp.mru = PP_MTU; 1231 } 1232 if (lcp_mru != sp->lcp.mru) 1233 SET(sp->lcp.opts, SPPP_LCP_OPT_MRU); 1234 1235 if (sp->scp[IDX_LCP].state == STATE_OPENED && 1236 ifp->if_mtu > sp->lcp.their_mru) { 1237 sp->pp_saved_mtu = ifp->if_mtu; 1238 ifp->if_mtu = sp->lcp.their_mru; 1239 1240 if (ifp->if_flags & IFF_DEBUG) { 1241 log(LOG_DEBUG, 1242 "%s: setting MTU " 1243 "from %"PRIu64" bytes " 1244 "to %"PRIu64" bytes\n", 1245 ifp->if_xname, sp->pp_saved_mtu, 1246 ifp->if_mtu); 1247 } 1248 } 1249 SPPP_UNLOCK(sp); 1250 break; 1251 1252 case SIOCGIFMTU: 1253 if ((error = ifioctl_common(ifp, cmd, data)) == ENETRESET) 1254 error = 0; 1255 break; 1256 case SIOCADDMULTI: 1257 case SIOCDELMULTI: 1258 break; 1259 1260 case SPPPSETAUTHCFG: 1261 case SPPPSETLCPCFG: 1262 case SPPPSETIDLETO: 1263 case SPPPSETAUTHFAILURE: 1264 case SPPPSETDNSOPTS: 1265 case SPPPSETKEEPALIVE: 1266 #if defined(COMPAT_50) || defined(MODULAR) 1267 case __SPPPSETIDLETO50: 1268 case __SPPPSETKEEPALIVE50: 1269 #endif /* COMPAT_50 || MODULAR */ 1270 error = kauth_authorize_network(l->l_cred, 1271 KAUTH_NETWORK_INTERFACE, 1272 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, 1273 NULL); 1274 if (error) 1275 break; 1276 error = sppp_params(sp, cmd, data); 1277 break; 1278 1279 case SPPPGETAUTHCFG: 1280 case SPPPGETLCPCFG: 1281 case SPPPGETAUTHFAILURES: 1282 error = kauth_authorize_network(l->l_cred, 1283 KAUTH_NETWORK_INTERFACE, 1284 KAUTH_REQ_NETWORK_INTERFACE_GETPRIV, ifp, (void *)cmd, 1285 NULL); 1286 if (error) 1287 break; 1288 error = sppp_params(sp, cmd, data); 1289 break; 1290 1291 case SPPPGETSTATUS: 1292 case SPPPGETSTATUSNCP: 1293 case SPPPGETIDLETO: 1294 case SPPPGETDNSOPTS: 1295 case SPPPGETDNSADDRS: 1296 case SPPPGETKEEPALIVE: 1297 #if defined(COMPAT_50) || defined(MODULAR) 1298 case __SPPPGETIDLETO50: 1299 case __SPPPGETKEEPALIVE50: 1300 #endif /* COMPAT_50 || MODULAR */ 1301 case SPPPGETLCPSTATUS: 1302 case SPPPGETIPCPSTATUS: 1303 case SPPPGETIPV6CPSTATUS: 1304 error = sppp_params(sp, cmd, data); 1305 break; 1306 1307 default: 1308 error = ifioctl_common(ifp, cmd, data); 1309 break; 1310 } 1311 splx(s); 1312 return (error); 1313 } 1314 1315 /* 1316 * Cisco framing implementation. 1317 */ 1318 1319 /* 1320 * Handle incoming Cisco keepalive protocol packets. 1321 */ 1322 static void 1323 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1324 { 1325 STDDCL; 1326 struct cisco_packet *h; 1327 #ifdef INET 1328 uint32_t me, mymask = 0; /* XXX: GCC */ 1329 #endif 1330 1331 SPPP_LOCK(sp, RW_WRITER); 1332 1333 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1334 if (debug) 1335 log(LOG_DEBUG, 1336 "%s: cisco invalid packet length: %d bytes\n", 1337 ifp->if_xname, m->m_pkthdr.len); 1338 SPPP_UNLOCK(sp); 1339 return; 1340 } 1341 h = mtod(m, struct cisco_packet *); 1342 if (debug) 1343 log(LOG_DEBUG, 1344 "%s: cisco input: %d bytes " 1345 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1346 ifp->if_xname, m->m_pkthdr.len, 1347 ntohl(h->type), h->par1, h->par2, (u_int)h->rel, 1348 (u_int)h->time0, (u_int)h->time1); 1349 switch (ntohl(h->type)) { 1350 default: 1351 if (debug) 1352 addlog("%s: cisco unknown packet type: 0x%x\n", 1353 ifp->if_xname, ntohl(h->type)); 1354 break; 1355 case CISCO_ADDR_REPLY: 1356 /* Reply on address request, ignore */ 1357 break; 1358 case CISCO_KEEPALIVE_REQ: 1359 sp->pp_alivecnt = 0; 1360 sp->scp[IDX_LCP].rseq = ntohl(h->par1); 1361 if (sp->scp[IDX_LCP].seq == sp->scp[IDX_LCP].rseq) { 1362 /* Local and remote sequence numbers are equal. 1363 * Probably, the line is in loopback mode. */ 1364 if (sp->pp_loopcnt >= LOOPALIVECNT) { 1365 printf ("%s: loopback\n", 1366 ifp->if_xname); 1367 sp->pp_loopcnt = 0; 1368 if (ifp->if_flags & IFF_UP) { 1369 SPPP_UNLOCK(sp); 1370 if_down(ifp); 1371 SPPP_LOCK(sp, RW_WRITER); 1372 1373 IF_PURGE(&sp->pp_cpq); 1374 } 1375 } 1376 ++sp->pp_loopcnt; 1377 1378 /* Generate new local sequence number */ 1379 sp->scp[IDX_LCP].seq = cprng_fast32(); 1380 break; 1381 } 1382 sp->pp_loopcnt = 0; 1383 if (! (ifp->if_flags & IFF_UP) && 1384 (ifp->if_flags & IFF_RUNNING)) { 1385 SPPP_UNLOCK(sp); 1386 if_up(ifp); 1387 SPPP_LOCK(sp, RW_WRITER); 1388 } 1389 break; 1390 case CISCO_ADDR_REQ: 1391 #ifdef INET 1392 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1393 if (me != 0L) 1394 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1395 #endif 1396 break; 1397 } 1398 SPPP_UNLOCK(sp); 1399 } 1400 1401 /* 1402 * Send Cisco keepalive packet. 1403 */ 1404 static void 1405 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1406 { 1407 STDDCL; 1408 struct ppp_header *h; 1409 struct cisco_packet *ch; 1410 struct mbuf *m; 1411 uint32_t t; 1412 1413 KASSERT(SPPP_WLOCKED(sp)); 1414 1415 t = time_uptime * 1000; 1416 MGETHDR(m, M_DONTWAIT, MT_DATA); 1417 if (! m) 1418 return; 1419 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1420 m_reset_rcvif(m); 1421 1422 h = mtod(m, struct ppp_header *); 1423 h->address = CISCO_MULTICAST; 1424 h->control = 0; 1425 h->protocol = htons(CISCO_KEEPALIVE); 1426 1427 ch = (struct cisco_packet *)(h + 1); 1428 ch->type = htonl(type); 1429 ch->par1 = htonl(par1); 1430 ch->par2 = htonl(par2); 1431 ch->rel = -1; 1432 1433 ch->time0 = htons((u_short)(t >> 16)); 1434 ch->time1 = htons((u_short) t); 1435 1436 if (debug) 1437 log(LOG_DEBUG, 1438 "%s: cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1439 ifp->if_xname, ntohl(ch->type), ch->par1, 1440 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1441 (u_int)ch->time1); 1442 1443 if (IF_QFULL(&sp->pp_cpq)) { 1444 IF_DROP(&sp->pp_fastq); 1445 IF_DROP(&ifp->if_snd); 1446 m_freem(m); 1447 if_statinc(ifp, if_oerrors); 1448 return; 1449 } 1450 1451 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 1452 IF_ENQUEUE(&sp->pp_cpq, m); 1453 1454 if (! (ifp->if_flags & IFF_OACTIVE)) { 1455 SPPP_UNLOCK(sp); 1456 if_start_lock(ifp); 1457 SPPP_LOCK(sp, RW_WRITER); 1458 } 1459 } 1460 1461 /* 1462 * PPP protocol implementation. 1463 */ 1464 1465 /* 1466 * Send PPP control protocol packet. 1467 */ 1468 static void 1469 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1470 u_char ident, u_short len, void *data) 1471 { 1472 STDDCL; 1473 struct lcp_header *lh; 1474 struct mbuf *m; 1475 size_t pkthdrlen; 1476 1477 KASSERT(SPPP_WLOCKED(sp)); 1478 1479 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1480 1481 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1482 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1483 MGETHDR(m, M_DONTWAIT, MT_DATA); 1484 if (! m) { 1485 return; 1486 } 1487 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1488 m_reset_rcvif(m); 1489 1490 if (sp->pp_flags & PP_NOFRAMING) { 1491 *mtod(m, uint16_t *) = htons(proto); 1492 lh = (struct lcp_header *)(mtod(m, uint8_t *) + 2); 1493 } else { 1494 struct ppp_header *h; 1495 h = mtod(m, struct ppp_header *); 1496 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1497 h->control = PPP_UI; /* Unnumbered Info */ 1498 h->protocol = htons(proto); /* Link Control Protocol */ 1499 lh = (struct lcp_header *)(h + 1); 1500 } 1501 lh->type = type; 1502 lh->ident = ident; 1503 lh->len = htons(LCP_HEADER_LEN + len); 1504 if (len) 1505 memcpy(lh + 1, data, len); 1506 1507 if (debug) { 1508 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 1509 ifp->if_xname, 1510 sppp_proto_name(proto), 1511 sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len)); 1512 if (len) 1513 sppp_print_bytes((u_char *)(lh + 1), len); 1514 addlog(">\n"); 1515 } 1516 if (IF_QFULL(&sp->pp_cpq)) { 1517 IF_DROP(&sp->pp_fastq); 1518 IF_DROP(&ifp->if_snd); 1519 m_freem(m); 1520 if_statinc(ifp, if_oerrors); 1521 return; 1522 } 1523 1524 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 1525 IF_ENQUEUE(&sp->pp_cpq, m); 1526 1527 if (! (ifp->if_flags & IFF_OACTIVE)) { 1528 SPPP_UNLOCK(sp); 1529 if_start_lock(ifp); 1530 SPPP_LOCK(sp, RW_WRITER); 1531 } 1532 } 1533 1534 static void 1535 sppp_cp_to_lcp(void *xsp) 1536 { 1537 struct sppp *sp = xsp; 1538 1539 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_to); 1540 } 1541 1542 static void 1543 sppp_cp_to_ipcp(void *xsp) 1544 { 1545 struct sppp *sp = xsp; 1546 1547 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_IPCP].work_to); 1548 } 1549 1550 static void 1551 sppp_cp_to_ipv6cp(void *xsp) 1552 { 1553 struct sppp *sp = xsp; 1554 1555 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_IPV6CP].work_to); 1556 } 1557 1558 static void 1559 sppp_cp_to_pap(void *xsp) 1560 { 1561 struct sppp *sp = xsp; 1562 1563 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_to); 1564 } 1565 1566 static void 1567 sppp_cp_to_chap(void *xsp) 1568 { 1569 struct sppp *sp = xsp; 1570 1571 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_to); 1572 } 1573 1574 static void 1575 sppp_cp_init(const struct cp *cp, struct sppp *sp) 1576 { 1577 struct sppp_cp *scp; 1578 typedef void (*sppp_co_cb_t)(void *); 1579 static const sppp_co_cb_t to_cb[IDX_COUNT] = { 1580 [IDX_LCP] = sppp_cp_to_lcp, 1581 [IDX_IPCP] = sppp_cp_to_ipcp, 1582 [IDX_IPV6CP] = sppp_cp_to_ipv6cp, 1583 [IDX_PAP] = sppp_cp_to_pap, 1584 [IDX_CHAP] = sppp_cp_to_chap, 1585 }; 1586 1587 scp = &sp->scp[cp->protoidx]; 1588 scp->state = STATE_INITIAL; 1589 scp->fail_counter = 0; 1590 scp->seq = 0; 1591 scp->rseq = 0; 1592 1593 SPPP_WQ_SET(&scp->work_up, cp->Up, cp); 1594 SPPP_WQ_SET(&scp->work_down, cp->Down, cp); 1595 SPPP_WQ_SET(&scp->work_open, cp->Open, cp); 1596 SPPP_WQ_SET(&scp->work_close, cp->Close, cp); 1597 SPPP_WQ_SET(&scp->work_to, cp->TO, cp); 1598 SPPP_WQ_SET(&scp->work_rcr, sppp_rcr_event, cp); 1599 SPPP_WQ_SET(&scp->work_rca, sppp_rca_event, cp); 1600 SPPP_WQ_SET(&scp->work_rcn, sppp_rcn_event, cp); 1601 SPPP_WQ_SET(&scp->work_rtr, sppp_rtr_event, cp); 1602 SPPP_WQ_SET(&scp->work_rta, sppp_rta_event, cp); 1603 SPPP_WQ_SET(&scp->work_rxj, sppp_rxj_event, cp); 1604 1605 callout_init(&scp->ch, CALLOUT_MPSAFE); 1606 callout_setfunc(&scp->ch, to_cb[cp->protoidx], sp); 1607 } 1608 1609 static void 1610 sppp_cp_fini(const struct cp *cp, struct sppp *sp) 1611 { 1612 struct sppp_cp *scp; 1613 scp = &sp->scp[cp->protoidx]; 1614 1615 sppp_wq_wait(sp->wq_cp, &scp->work_up); 1616 sppp_wq_wait(sp->wq_cp, &scp->work_down); 1617 sppp_wq_wait(sp->wq_cp, &scp->work_open); 1618 sppp_wq_wait(sp->wq_cp, &scp->work_close); 1619 sppp_wq_wait(sp->wq_cp, &scp->work_to); 1620 sppp_wq_wait(sp->wq_cp, &scp->work_rcr); 1621 sppp_wq_wait(sp->wq_cp, &scp->work_rca); 1622 sppp_wq_wait(sp->wq_cp, &scp->work_rcn); 1623 sppp_wq_wait(sp->wq_cp, &scp->work_rtr); 1624 sppp_wq_wait(sp->wq_cp, &scp->work_rta); 1625 sppp_wq_wait(sp->wq_cp, &scp->work_rxj); 1626 1627 callout_halt(&scp->ch, NULL); 1628 callout_destroy(&scp->ch); 1629 } 1630 1631 /* 1632 * Handle incoming PPP control protocol packets. 1633 */ 1634 static void 1635 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1636 { 1637 STDDCL; 1638 struct lcp_header *h; 1639 int printlen, len = m->m_pkthdr.len; 1640 enum cp_rcr_type type; 1641 size_t blen, rlen; 1642 u_char *p; 1643 uint32_t u32; 1644 uint8_t *buf; 1645 1646 SPPP_LOCK(sp, RW_WRITER); 1647 1648 if (len < 4) { 1649 if (debug) 1650 log(LOG_DEBUG, 1651 "%s: %s invalid packet length: %d bytes\n", 1652 ifp->if_xname, cp->name, len); 1653 SPPP_UNLOCK(sp); 1654 return; 1655 } 1656 h = mtod(m, struct lcp_header *); 1657 if (debug) { 1658 printlen = ntohs(h->len); 1659 log(LOG_DEBUG, 1660 "%s: %s input(%s): <%s id=0x%x len=%d", 1661 ifp->if_xname, cp->name, 1662 sppp_state_name(sp->scp[cp->protoidx].state), 1663 sppp_cp_type_name(h->type), h->ident, printlen); 1664 if (len < printlen) 1665 printlen = len; 1666 if (printlen > 4) 1667 sppp_print_bytes((u_char *)(h + 1), printlen - 4); 1668 addlog(">\n"); 1669 } 1670 if (len > ntohs(h->len)) 1671 len = ntohs(h->len); 1672 p = (u_char *)(h + 1); 1673 switch (h->type) { 1674 case CONF_REQ: 1675 if (len < 4) { 1676 if (debug) 1677 addlog("%s: %s invalid conf-req length %d\n", 1678 ifp->if_xname, cp->name, 1679 len); 1680 if_statinc(ifp, if_ierrors); 1681 break; 1682 } 1683 1684 buf = NULL; 1685 blen = 0; 1686 rlen = 0; 1687 1688 type = (cp->parse_confreq)(sp, h, len, 1689 &buf, &blen, &rlen); 1690 1691 if (type == CP_RCR_ERR) { 1692 /* fatal error, shut down */ 1693 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 1694 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 1695 } else if (buf != NULL) { 1696 if (sp->scp[cp->protoidx].rcr_buf != NULL) { 1697 kmem_intr_free(sp->scp[cp->protoidx].rcr_buf, 1698 sp->scp[cp->protoidx].rcr_blen); 1699 } 1700 1701 sp->scp[cp->protoidx].rcr_buf = (void *)buf; 1702 buf = NULL; 1703 1704 sp->scp[cp->protoidx].rcr_blen = blen; 1705 sp->scp[cp->protoidx].rcr_rlen = rlen; 1706 sp->scp[cp->protoidx].rcr_type = type; 1707 sp->scp[cp->protoidx].rconfid = h->ident; 1708 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rcr); 1709 } 1710 break; 1711 case CONF_ACK: 1712 if (h->ident != sp->scp[cp->protoidx].confid) { 1713 if (debug) 1714 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1715 ifp->if_xname, cp->name, 1716 h->ident, sp->scp[cp->protoidx].confid); 1717 if_statinc(ifp, if_ierrors); 1718 break; 1719 } 1720 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rca); 1721 break; 1722 case CONF_NAK: 1723 case CONF_REJ: 1724 if (h->ident != sp->scp[cp->protoidx].confid) { 1725 if (debug) 1726 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1727 ifp->if_xname, cp->name, 1728 h->ident, sp->scp[cp->protoidx].confid); 1729 if_statinc(ifp, if_ierrors); 1730 break; 1731 } 1732 if (h->type == CONF_NAK) 1733 (cp->parse_confnak)(sp, h, len); 1734 else /* CONF_REJ */ 1735 (cp->parse_confrej)(sp, h, len); 1736 1737 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rcn); 1738 break; 1739 1740 case TERM_REQ: 1741 sp->scp[cp->protoidx].rseq = h->ident; 1742 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rtr); 1743 break; 1744 case TERM_ACK: 1745 if (h->ident != sp->scp[cp->protoidx].confid && 1746 h->ident != sp->scp[cp->protoidx].seq) { 1747 if (debug) 1748 addlog("%s: %s id mismatch " 1749 "0x%x != 0x%x and 0x%x != %0lx\n", 1750 ifp->if_xname, cp->name, 1751 h->ident, sp->scp[cp->protoidx].confid, 1752 h->ident, sp->scp[cp->protoidx].seq); 1753 if_statinc(ifp, if_ierrors); 1754 break; 1755 } 1756 1757 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rta); 1758 break; 1759 case CODE_REJ: 1760 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1761 log(LOG_INFO, 1762 "%s: %s: ignoring RXJ (%s) for code ?, " 1763 "danger will robinson\n", 1764 ifp->if_xname, cp->name, 1765 sppp_cp_type_name(h->type)); 1766 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rxj); 1767 break; 1768 case PROTO_REJ: 1769 { 1770 int catastrophic; 1771 const struct cp *upper; 1772 int i; 1773 uint16_t proto; 1774 1775 catastrophic = 0; 1776 upper = NULL; 1777 proto = p[0] << 8 | p[1]; 1778 for (i = 0; i < IDX_COUNT; i++) { 1779 if (cps[i]->proto == proto) { 1780 upper = cps[i]; 1781 break; 1782 } 1783 } 1784 if (upper == NULL) 1785 catastrophic++; 1786 1787 if (debug) 1788 log(LOG_INFO, 1789 "%s: %s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1790 ifp->if_xname, cp->name, catastrophic ? '-' : '+', 1791 sppp_cp_type_name(h->type), proto, 1792 upper ? upper->name : "unknown", 1793 upper ? sppp_state_name(sp->scp[upper->protoidx].state) : "?"); 1794 1795 /* 1796 * if we got RXJ+ against conf-req, the peer does not implement 1797 * this particular protocol type. terminate the protocol. 1798 */ 1799 if (upper && !catastrophic) { 1800 if (sp->scp[upper->protoidx].state == STATE_REQ_SENT) { 1801 sppp_wq_add(sp->wq_cp, 1802 &sp->scp[upper->protoidx].work_close); 1803 break; 1804 } 1805 } 1806 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_rxj); 1807 break; 1808 } 1809 case DISC_REQ: 1810 if (cp->proto != PPP_LCP) 1811 goto illegal; 1812 /* Discard the packet. */ 1813 break; 1814 case ECHO_REQ: 1815 if (cp->proto != PPP_LCP) 1816 goto illegal; 1817 if (sp->scp[cp->protoidx].state != STATE_OPENED) { 1818 if (debug) 1819 addlog("%s: lcp echo req but lcp closed\n", 1820 ifp->if_xname); 1821 if_statinc(ifp, if_ierrors); 1822 break; 1823 } 1824 if (len < 8) { 1825 if (debug) 1826 addlog("%s: invalid lcp echo request " 1827 "packet length: %d bytes\n", 1828 ifp->if_xname, len); 1829 break; 1830 } 1831 memcpy(&u32, h + 1, sizeof u32); 1832 if (ntohl(u32) == sp->lcp.magic) { 1833 /* Line loopback mode detected. */ 1834 printf("%s: loopback\n", ifp->if_xname); 1835 SPPP_UNLOCK(sp); 1836 if_down(ifp); 1837 SPPP_LOCK(sp, RW_WRITER); 1838 1839 IF_PURGE(&sp->pp_cpq); 1840 1841 /* Shut down the PPP link. */ 1842 /* XXX */ 1843 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_down); 1844 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_up); 1845 break; 1846 } 1847 u32 = htonl(sp->lcp.magic); 1848 memcpy(h + 1, &u32, sizeof u32); 1849 if (debug) 1850 addlog("%s: got lcp echo req, sending echo rep\n", 1851 ifp->if_xname); 1852 sppp_cp_send(sp, PPP_LCP, ECHO_REPLY, h->ident, len - 4, 1853 h + 1); 1854 break; 1855 case ECHO_REPLY: 1856 if (cp->proto != PPP_LCP) 1857 goto illegal; 1858 if (h->ident != sp->lcp.echoid) { 1859 if_statinc(ifp, if_ierrors); 1860 break; 1861 } 1862 if (len < 8) { 1863 if (debug) 1864 addlog("%s: lcp invalid echo reply " 1865 "packet length: %d bytes\n", 1866 ifp->if_xname, len); 1867 break; 1868 } 1869 if (debug) 1870 addlog("%s: lcp got echo rep\n", 1871 ifp->if_xname); 1872 memcpy(&u32, h + 1, sizeof u32); 1873 if (ntohl(u32) != sp->lcp.magic) 1874 sp->pp_alivecnt = 0; 1875 break; 1876 default: 1877 /* Unknown packet type -- send Code-Reject packet. */ 1878 illegal: 1879 if (debug) 1880 addlog("%s: %s send code-rej for 0x%x\n", 1881 ifp->if_xname, cp->name, h->type); 1882 sppp_cp_send(sp, cp->proto, CODE_REJ, 1883 ++sp->scp[cp->protoidx].seq, m->m_pkthdr.len, h); 1884 if_statinc(ifp, if_ierrors); 1885 } 1886 1887 SPPP_UNLOCK(sp); 1888 } 1889 1890 /* 1891 * The generic part of all Up/Down/Open/Close/TO event handlers. 1892 * Basically, the state transition handling in the automaton. 1893 */ 1894 static void 1895 sppp_up_event(struct sppp *sp, void *xcp) 1896 { 1897 const struct cp *cp = xcp; 1898 STDDCL; 1899 1900 KASSERT(SPPP_WLOCKED(sp)); 1901 KASSERT(!cpu_softintr_p()); 1902 1903 if ((cp->flags & CP_AUTH) != 0 && 1904 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1905 return; 1906 1907 if (debug) 1908 log(LOG_DEBUG, "%s: %s up(%s)\n", 1909 ifp->if_xname, cp->name, 1910 sppp_state_name(sp->scp[cp->protoidx].state)); 1911 1912 switch (sp->scp[cp->protoidx].state) { 1913 case STATE_INITIAL: 1914 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1915 break; 1916 case STATE_STARTING: 1917 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 1918 (cp->scr)(sp); 1919 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1920 break; 1921 default: 1922 printf("%s: %s illegal up in state %s\n", 1923 ifp->if_xname, cp->name, 1924 sppp_state_name(sp->scp[cp->protoidx].state)); 1925 } 1926 } 1927 1928 static void 1929 sppp_down_event(struct sppp *sp, void *xcp) 1930 { 1931 const struct cp *cp = xcp; 1932 STDDCL; 1933 1934 KASSERT(SPPP_WLOCKED(sp)); 1935 KASSERT(!cpu_softintr_p()); 1936 1937 if ((cp->flags & CP_AUTH) != 0 && 1938 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1939 return; 1940 1941 if (debug) 1942 log(LOG_DEBUG, "%s: %s down(%s)\n", 1943 ifp->if_xname, cp->name, 1944 sppp_state_name(sp->scp[cp->protoidx].state)); 1945 1946 switch (sp->scp[cp->protoidx].state) { 1947 case STATE_CLOSED: 1948 case STATE_CLOSING: 1949 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1950 break; 1951 case STATE_STOPPED: 1952 (cp->tls)(cp, sp); 1953 /* fall through */ 1954 case STATE_STOPPING: 1955 case STATE_REQ_SENT: 1956 case STATE_ACK_RCVD: 1957 case STATE_ACK_SENT: 1958 sppp_cp_change_state(cp, sp, STATE_STARTING); 1959 break; 1960 case STATE_OPENED: 1961 (cp->tld)(sp); 1962 sppp_cp_change_state(cp, sp, STATE_STARTING); 1963 break; 1964 default: 1965 /* 1966 * a down event may be caused regardless 1967 * of state just in LCP case. 1968 */ 1969 if (cp->proto == PPP_LCP) 1970 break; 1971 1972 printf("%s: %s illegal down in state %s\n", 1973 ifp->if_xname, cp->name, 1974 sppp_state_name(sp->scp[cp->protoidx].state)); 1975 } 1976 } 1977 1978 static void 1979 sppp_open_event(struct sppp *sp, void *xcp) 1980 { 1981 const struct cp *cp = xcp; 1982 STDDCL; 1983 1984 KASSERT(SPPP_WLOCKED(sp)); 1985 KASSERT(!cpu_softintr_p()); 1986 1987 if ((cp->flags & CP_AUTH) != 0 && 1988 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1989 return; 1990 1991 if (debug) 1992 log(LOG_DEBUG, "%s: %s open(%s)\n", 1993 ifp->if_xname, cp->name, 1994 sppp_state_name(sp->scp[cp->protoidx].state)); 1995 1996 switch (sp->scp[cp->protoidx].state) { 1997 case STATE_INITIAL: 1998 sppp_cp_change_state(cp, sp, STATE_STARTING); 1999 (cp->tls)(cp, sp); 2000 break; 2001 case STATE_STARTING: 2002 break; 2003 case STATE_CLOSED: 2004 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2005 (cp->scr)(sp); 2006 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2007 break; 2008 case STATE_STOPPED: 2009 case STATE_STOPPING: 2010 case STATE_REQ_SENT: 2011 case STATE_ACK_RCVD: 2012 case STATE_ACK_SENT: 2013 case STATE_OPENED: 2014 break; 2015 case STATE_CLOSING: 2016 sppp_cp_change_state(cp, sp, STATE_STOPPING); 2017 break; 2018 } 2019 } 2020 2021 static void 2022 sppp_close_event(struct sppp *sp, void *xcp) 2023 { 2024 const struct cp *cp = xcp; 2025 STDDCL; 2026 2027 KASSERT(SPPP_WLOCKED(sp)); 2028 KASSERT(!cpu_softintr_p()); 2029 2030 if ((cp->flags & CP_AUTH) != 0 && 2031 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 2032 return; 2033 2034 if (debug) 2035 log(LOG_DEBUG, "%s: %s close(%s)\n", 2036 ifp->if_xname, cp->name, 2037 sppp_state_name(sp->scp[cp->protoidx].state)); 2038 2039 switch (sp->scp[cp->protoidx].state) { 2040 case STATE_INITIAL: 2041 case STATE_CLOSED: 2042 case STATE_CLOSING: 2043 break; 2044 case STATE_STARTING: 2045 sppp_cp_change_state(cp, sp, STATE_INITIAL); 2046 (cp->tlf)(cp, sp); 2047 break; 2048 case STATE_STOPPED: 2049 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2050 break; 2051 case STATE_STOPPING: 2052 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2053 break; 2054 case STATE_OPENED: 2055 (cp->tld)(sp); 2056 /* fall through */ 2057 case STATE_REQ_SENT: 2058 case STATE_ACK_RCVD: 2059 case STATE_ACK_SENT: 2060 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_terminate; 2061 if ((cp->flags & CP_AUTH) == 0) { 2062 sppp_cp_send(sp, cp->proto, TERM_REQ, 2063 ++sp->scp[cp->protoidx].seq, 0, 0); 2064 } 2065 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2066 break; 2067 } 2068 } 2069 2070 static void 2071 sppp_to_event(struct sppp *sp, void *xcp) 2072 { 2073 const struct cp *cp = xcp; 2074 int s; 2075 STDDCL; 2076 2077 KASSERT(SPPP_WLOCKED(sp)); 2078 KASSERT(!cpu_softintr_p()); 2079 2080 s = splnet(); 2081 2082 if (debug) 2083 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 2084 ifp->if_xname, cp->name, 2085 sppp_state_name(sp->scp[cp->protoidx].state), 2086 sp->scp[cp->protoidx].rst_counter); 2087 2088 if (--sp->scp[cp->protoidx].rst_counter < 0) 2089 /* TO- event */ 2090 switch (sp->scp[cp->protoidx].state) { 2091 case STATE_CLOSING: 2092 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2093 (cp->tlf)(cp, sp); 2094 break; 2095 case STATE_STOPPING: 2096 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2097 (cp->tlf)(cp, sp); 2098 break; 2099 case STATE_REQ_SENT: 2100 case STATE_ACK_RCVD: 2101 case STATE_ACK_SENT: 2102 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2103 (cp->tlf)(cp, sp); 2104 break; 2105 } 2106 else 2107 /* TO+ event */ 2108 switch (sp->scp[cp->protoidx].state) { 2109 case STATE_CLOSING: 2110 case STATE_STOPPING: 2111 if ((cp->flags & CP_AUTH) == 0) { 2112 sppp_cp_send(sp, cp->proto, TERM_REQ, 2113 ++sp->scp[cp->protoidx].seq, 0, 0); 2114 } 2115 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2116 break; 2117 case STATE_REQ_SENT: 2118 case STATE_ACK_RCVD: 2119 (cp->scr)(sp); 2120 /* sppp_cp_change_state() will restart the timer */ 2121 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2122 break; 2123 case STATE_ACK_SENT: 2124 (cp->scr)(sp); 2125 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2126 break; 2127 } 2128 2129 splx(s); 2130 } 2131 2132 static void 2133 sppp_rcr_event(struct sppp *sp, void *xcp) 2134 { 2135 const struct cp *cp = xcp; 2136 enum cp_rcr_type type; 2137 void *buf; 2138 size_t blen; 2139 STDDCL; 2140 2141 KASSERT(!cpu_softintr_p()); 2142 2143 type = sp->scp[cp->protoidx].rcr_type; 2144 buf = sp->scp[cp->protoidx].rcr_buf; 2145 blen = sp->scp[cp->protoidx].rcr_blen; 2146 2147 if (type == CP_RCR_ACK) { 2148 /* RCR+ event */ 2149 switch (sp->scp[cp->protoidx].state) { 2150 case STATE_OPENED: 2151 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2152 cp->tld(sp); 2153 cp->scr(sp); 2154 cp->scan(cp, sp); 2155 break; 2156 case STATE_ACK_SENT: 2157 case STATE_REQ_SENT: 2158 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2159 cp->scan(cp, sp); 2160 break; 2161 case STATE_STOPPED: 2162 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2163 cp->scr(sp); 2164 cp->scan(cp, sp); 2165 break; 2166 case STATE_ACK_RCVD: 2167 sppp_cp_change_state(cp, sp, STATE_OPENED); 2168 if (debug) 2169 log(LOG_DEBUG, "%s: %s tlu\n", 2170 ifp->if_xname, 2171 cp->name); 2172 cp->tlu(sp); 2173 cp->scan(cp, sp); 2174 break; 2175 case STATE_CLOSING: 2176 case STATE_STOPPING: 2177 if (buf != NULL) { 2178 sp->scp[cp->protoidx].rcr_buf = NULL; 2179 sp->scp[cp->protoidx].rcr_blen = 0; 2180 kmem_free(buf, blen); 2181 } 2182 break; 2183 case STATE_CLOSED: 2184 if ((cp->flags & CP_AUTH) == 0) { 2185 sppp_cp_send(sp, cp->proto, TERM_ACK, 2186 sp->scp[cp->protoidx].rconfid, 0, 0); 2187 } 2188 break; 2189 default: 2190 printf("%s: %s illegal RCR+ in state %s\n", 2191 ifp->if_xname, cp->name, 2192 sppp_state_name(sp->scp[cp->protoidx].state)); 2193 if_statinc(ifp, if_ierrors); 2194 } 2195 } else { 2196 /* RCR- event */ 2197 switch (sp->scp[cp->protoidx].state) { 2198 case STATE_OPENED: 2199 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2200 cp->tld(sp); 2201 cp->scr(sp); 2202 cp->scan(cp, sp); 2203 break; 2204 case STATE_ACK_SENT: 2205 case STATE_REQ_SENT: 2206 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2207 cp->scan(cp, sp); 2208 break; 2209 case STATE_STOPPED: 2210 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2211 cp->scr(sp); 2212 cp->scan(cp, sp); 2213 break; 2214 case STATE_ACK_RCVD: 2215 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2216 cp->scan(cp, sp); 2217 break; 2218 case STATE_CLOSING: 2219 case STATE_STOPPING: 2220 if (buf != NULL) { 2221 sp->scp[cp->protoidx].rcr_buf = NULL; 2222 sp->scp[cp->protoidx].rcr_blen = 0; 2223 kmem_free(buf, blen); 2224 } 2225 break; 2226 case STATE_CLOSED: 2227 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2228 if ((cp->flags & CP_AUTH) == 0) { 2229 sppp_cp_send(sp, cp->proto, TERM_ACK, 2230 sp->scp[cp->protoidx].rconfid, 0, 0); 2231 } 2232 break; 2233 default: 2234 printf("%s: %s illegal RCR- in state %s\n", 2235 ifp->if_xname, cp->name, 2236 sppp_state_name(sp->scp[cp->protoidx].state)); 2237 if_statinc(ifp, if_ierrors); 2238 } 2239 } 2240 } 2241 2242 static void 2243 sppp_rca_event(struct sppp *sp, void *xcp) 2244 { 2245 const struct cp *cp = xcp; 2246 STDDCL; 2247 2248 KASSERT(!cpu_softintr_p()); 2249 2250 switch (sp->scp[cp->protoidx].state) { 2251 case STATE_CLOSED: 2252 case STATE_STOPPED: 2253 if ((cp->flags & CP_AUTH) == 0) { 2254 sppp_cp_send(sp, cp->proto, TERM_ACK, 2255 sp->scp[cp->protoidx].rconfid, 0, 0); 2256 } 2257 break; 2258 case STATE_CLOSING: 2259 case STATE_STOPPING: 2260 break; 2261 case STATE_REQ_SENT: 2262 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2263 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2264 break; 2265 case STATE_OPENED: 2266 (cp->tld)(sp); 2267 /* fall through */ 2268 case STATE_ACK_RCVD: 2269 (cp->scr)(sp); 2270 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2271 break; 2272 case STATE_ACK_SENT: 2273 sppp_cp_change_state(cp, sp, STATE_OPENED); 2274 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2275 if (debug) 2276 log(LOG_DEBUG, "%s: %s tlu\n", 2277 ifp->if_xname, cp->name); 2278 (cp->tlu)(sp); 2279 break; 2280 default: 2281 printf("%s: %s illegal RCA in state %s\n", 2282 ifp->if_xname, cp->name, 2283 sppp_state_name(sp->scp[cp->protoidx].state)); 2284 if_statinc(ifp, if_ierrors); 2285 } 2286 } 2287 2288 static void 2289 sppp_rcn_event(struct sppp *sp, void *xcp) 2290 { 2291 const struct cp *cp = xcp; 2292 struct ifnet *ifp = &sp->pp_if; 2293 2294 KASSERT(!cpu_softintr_p()); 2295 2296 switch (sp->scp[cp->protoidx].state) { 2297 case STATE_CLOSED: 2298 case STATE_STOPPED: 2299 if ((cp->flags & CP_AUTH) == 0) { 2300 sppp_cp_send(sp, cp->proto, TERM_ACK, 2301 sp->scp[cp->protoidx].rconfid, 0, 0); 2302 } 2303 break; 2304 case STATE_REQ_SENT: 2305 case STATE_ACK_SENT: 2306 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2307 (cp->scr)(sp); 2308 break; 2309 case STATE_OPENED: 2310 (cp->tld)(sp); 2311 /* fall through */ 2312 case STATE_ACK_RCVD: 2313 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2314 (cp->scr)(sp); 2315 break; 2316 case STATE_CLOSING: 2317 case STATE_STOPPING: 2318 break; 2319 default: 2320 printf("%s: %s illegal RCN in state %s\n", 2321 ifp->if_xname, cp->name, 2322 sppp_state_name(sp->scp[cp->protoidx].state)); 2323 if_statinc(ifp, if_ierrors); 2324 } 2325 } 2326 2327 static void 2328 sppp_rtr_event(struct sppp *sp, void *xcp) 2329 { 2330 const struct cp *cp = xcp; 2331 STDDCL; 2332 2333 KASSERT(!cpu_softintr_p()); 2334 2335 switch (sp->scp[cp->protoidx].state) { 2336 case STATE_ACK_RCVD: 2337 case STATE_ACK_SENT: 2338 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2339 break; 2340 case STATE_CLOSED: 2341 case STATE_STOPPED: 2342 case STATE_CLOSING: 2343 case STATE_STOPPING: 2344 case STATE_REQ_SENT: 2345 break; 2346 case STATE_OPENED: 2347 (cp->tld)(sp); 2348 sp->scp[cp->protoidx].rst_counter = 0; 2349 sppp_cp_change_state(cp, sp, STATE_STOPPING); 2350 break; 2351 default: 2352 printf("%s: %s illegal RTR in state %s\n", 2353 ifp->if_xname, cp->name, 2354 sppp_state_name(sp->scp[cp->protoidx].state)); 2355 if_statinc(ifp, if_ierrors); 2356 return; 2357 } 2358 2359 /* Send Terminate-Ack packet. */ 2360 if (debug) 2361 log(LOG_DEBUG, "%s: %s send terminate-ack\n", 2362 ifp->if_xname, cp->name); 2363 if ((cp->flags & CP_AUTH) == 0) { 2364 sppp_cp_send(sp, cp->proto, TERM_ACK, 2365 sp->scp[cp->protoidx].rseq, 0, 0); 2366 } 2367 } 2368 2369 static void 2370 sppp_rta_event(struct sppp *sp, void *xcp) 2371 { 2372 const struct cp *cp = xcp; 2373 struct ifnet *ifp = &sp->pp_if; 2374 2375 KASSERT(!cpu_softintr_p()); 2376 2377 switch (sp->scp[cp->protoidx].state) { 2378 case STATE_CLOSED: 2379 case STATE_STOPPED: 2380 case STATE_REQ_SENT: 2381 case STATE_ACK_SENT: 2382 break; 2383 case STATE_CLOSING: 2384 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2385 (cp->tlf)(cp, sp); 2386 break; 2387 case STATE_STOPPING: 2388 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2389 (cp->tlf)(cp, sp); 2390 break; 2391 case STATE_ACK_RCVD: 2392 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2393 break; 2394 case STATE_OPENED: 2395 (cp->tld)(sp); 2396 (cp->scr)(sp); 2397 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2398 break; 2399 default: 2400 printf("%s: %s illegal RTA in state %s\n", 2401 ifp->if_xname, cp->name, 2402 sppp_state_name(sp->scp[cp->protoidx].state)); 2403 if_statinc(ifp, if_ierrors); 2404 } 2405 } 2406 2407 static void 2408 sppp_rxj_event(struct sppp *sp, void *xcp) 2409 { 2410 const struct cp *cp = xcp; 2411 struct ifnet *ifp = &sp->pp_if; 2412 2413 KASSERT(!cpu_softintr_p()); 2414 2415 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 2416 switch (sp->scp[cp->protoidx].state) { 2417 case STATE_CLOSED: 2418 case STATE_STOPPED: 2419 case STATE_REQ_SENT: 2420 case STATE_ACK_SENT: 2421 case STATE_CLOSING: 2422 case STATE_STOPPING: 2423 case STATE_OPENED: 2424 break; 2425 case STATE_ACK_RCVD: 2426 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2427 break; 2428 default: 2429 printf("%s: %s illegal RXJ- in state %s\n", 2430 ifp->if_xname, cp->name, 2431 sppp_state_name(sp->scp[cp->protoidx].state)); 2432 if_statinc(ifp, if_ierrors); 2433 } 2434 } 2435 2436 /* 2437 * Change the state of a control protocol in the state automaton. 2438 * Takes care of starting/stopping the restart timer. 2439 */ 2440 void 2441 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 2442 { 2443 2444 KASSERT(SPPP_WLOCKED(sp)); 2445 2446 sp->scp[cp->protoidx].state = newstate; 2447 callout_stop(&sp->scp[cp->protoidx].ch); 2448 switch (newstate) { 2449 case STATE_INITIAL: 2450 case STATE_STARTING: 2451 case STATE_CLOSED: 2452 case STATE_STOPPED: 2453 case STATE_OPENED: 2454 break; 2455 case STATE_CLOSING: 2456 case STATE_STOPPING: 2457 case STATE_REQ_SENT: 2458 case STATE_ACK_RCVD: 2459 case STATE_ACK_SENT: 2460 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2461 break; 2462 } 2463 } 2464 2465 /* 2466 *--------------------------------------------------------------------------* 2467 * * 2468 * The LCP implementation. * 2469 * * 2470 *--------------------------------------------------------------------------* 2471 */ 2472 static void 2473 sppp_lcp_init(struct sppp *sp) 2474 { 2475 2476 KASSERT(SPPP_WLOCKED(sp)); 2477 2478 sppp_cp_init(&lcp, sp); 2479 2480 SET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC); 2481 sp->lcp.magic = 0; 2482 sp->lcp.protos = 0; 2483 sp->lcp.max_terminate = 2; 2484 sp->lcp.max_configure = 10; 2485 sp->lcp.max_failure = 10; 2486 sp->lcp.tlf_sent = false; 2487 2488 /* 2489 * Initialize counters and timeout values. Note that we don't 2490 * use the 3 seconds suggested in RFC 1661 since we are likely 2491 * running on a fast link. XXX We should probably implement 2492 * the exponential backoff option. Note that these values are 2493 * relevant for all control protocols, not just LCP only. 2494 */ 2495 sp->lcp.timeout = 1 * hz; 2496 } 2497 2498 static void 2499 sppp_lcp_up(struct sppp *sp, void *xcp) 2500 { 2501 const struct cp *cp = xcp; 2502 int pidx; 2503 STDDCL; 2504 2505 KASSERT(SPPP_WLOCKED(sp)); 2506 2507 pidx = cp->protoidx; 2508 /* Initialize activity timestamp: opening a connection is an activity */ 2509 sp->pp_last_receive = sp->pp_last_activity = time_uptime; 2510 2511 /* 2512 * If this interface is passive or dial-on-demand, and we are 2513 * still in Initial state, it means we've got an incoming 2514 * call. Activate the interface. 2515 */ 2516 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2517 if (debug) 2518 log(LOG_DEBUG, 2519 "%s: Up event", ifp->if_xname); 2520 ifp->if_flags |= IFF_RUNNING; 2521 if (sp->scp[pidx].state == STATE_INITIAL) { 2522 if (debug) 2523 addlog("(incoming call)\n"); 2524 sp->pp_flags |= PP_CALLIN; 2525 sppp_wq_add(sp->wq_cp, &sp->scp[pidx].work_open); 2526 } else if (debug) 2527 addlog("\n"); 2528 } 2529 2530 sppp_up_event(sp, xcp); 2531 } 2532 2533 static void 2534 sppp_lcp_down(struct sppp *sp, void *xcp) 2535 { 2536 const struct cp *cp = xcp; 2537 int pidx; 2538 STDDCL; 2539 2540 KASSERT(SPPP_WLOCKED(sp)); 2541 KASSERT(!cpu_softintr_p()); 2542 2543 pidx = cp->protoidx; 2544 sppp_down_event(sp, xcp); 2545 2546 /* 2547 * We need to do tls to restart when a down event is caused 2548 * by the last tlf. 2549 */ 2550 if (sp->scp[pidx].state == STATE_STARTING && 2551 sp->lcp.tlf_sent) { 2552 cp->tls(cp, sp); 2553 sp->lcp.tlf_sent = false; 2554 } 2555 2556 /* 2557 * If this is neither a dial-on-demand nor a passive 2558 * interface, simulate an ``ifconfig down'' action, so the 2559 * administrator can force a redial by another ``ifconfig 2560 * up''. XXX For leased line operation, should we immediately 2561 * try to reopen the connection here? 2562 */ 2563 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2564 if (debug) 2565 log(LOG_INFO, 2566 "%s: Down event (carrier loss), taking interface down.\n", 2567 ifp->if_xname); 2568 SPPP_UNLOCK(sp); 2569 if_down(ifp); 2570 SPPP_LOCK(sp, RW_WRITER); 2571 2572 if (sp->lcp.reestablish) 2573 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 2574 } else { 2575 if (debug) 2576 log(LOG_DEBUG, 2577 "%s: Down event (carrier loss)\n", 2578 ifp->if_xname); 2579 2580 sp->pp_flags &= ~PP_CALLIN; 2581 if (sp->scp[pidx].state != STATE_INITIAL) 2582 sppp_wq_add(sp->wq_cp, &sp->scp[pidx].work_close); 2583 ifp->if_flags &= ~IFF_RUNNING; 2584 } 2585 sp->scp[pidx].fail_counter = 0; 2586 } 2587 2588 static void 2589 sppp_lcp_open(struct sppp *sp, void *xcp) 2590 { 2591 2592 KASSERT(SPPP_WLOCKED(sp)); 2593 KASSERT(!cpu_softintr_p()); 2594 2595 sp->lcp.reestablish = false; 2596 sp->scp[IDX_LCP].fail_counter = 0; 2597 2598 if (sp->pp_if.if_mtu < PP_MTU) { 2599 sp->lcp.mru = sp->pp_if.if_mtu; 2600 SET(sp->lcp.opts, SPPP_LCP_OPT_MRU); 2601 } else { 2602 sp->lcp.mru = PP_MTU; 2603 } 2604 sp->lcp.their_mru = PP_MTU; 2605 2606 /* 2607 * If we are authenticator, negotiate LCP_AUTH 2608 */ 2609 if (sp->hisauth.proto != 0) 2610 SET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 2611 else 2612 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 2613 sp->pp_flags &= ~PP_NEEDAUTH; 2614 sppp_open_event(sp, xcp); 2615 } 2616 2617 2618 /* 2619 * Analyze a configure request. Return true if it was agreeable, and 2620 * caused action sca, false if it has been rejected or nak'ed, and 2621 * caused action scn. (The return value is used to make the state 2622 * transition decision in the state automaton.) 2623 */ 2624 static enum cp_rcr_type 2625 sppp_lcp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 2626 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 2627 { 2628 STDDCL; 2629 u_char *buf, *r, *p, l, blen; 2630 enum cp_rcr_type type; 2631 int len, rlen; 2632 uint32_t nmagic; 2633 u_short authproto; 2634 2635 KASSERT(SPPP_WLOCKED(sp)); 2636 2637 if (origlen < sizeof(*h)) 2638 return CP_RCR_DROP; 2639 2640 origlen -= sizeof(*h); 2641 type = CP_RCR_NONE; 2642 type = 0; 2643 2644 if (origlen <= 0) 2645 return CP_RCR_DROP; 2646 else 2647 blen = origlen; 2648 2649 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 2650 if (buf == NULL) 2651 return CP_RCR_DROP; 2652 2653 if (debug) 2654 log(LOG_DEBUG, "%s: lcp parse opts:", 2655 ifp->if_xname); 2656 2657 /* pass 1: check for things that need to be rejected */ 2658 p = (void *)(h + 1); 2659 r = buf; 2660 rlen = 0; 2661 for (len = origlen; len > 1; len-= l, p += l) { 2662 l = p[1]; 2663 if (l == 0) 2664 break; 2665 2666 /* Sanity check option length */ 2667 if (l > len) { 2668 /* 2669 * Malicious option - drop immediately. 2670 * XXX Maybe we should just RXJ it? 2671 */ 2672 addlog("%s: received malicious LCP option 0x%02x, " 2673 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp->if_xname, 2674 p[0], l, len); 2675 type = CP_RCR_ERR; 2676 goto end; 2677 } 2678 if (debug) 2679 addlog(" %s", sppp_lcp_opt_name(*p)); 2680 switch (p[0]) { 2681 case LCP_OPT_MAGIC: 2682 /* Magic number. */ 2683 /* fall through, both are same length */ 2684 case LCP_OPT_ASYNC_MAP: 2685 /* Async control character map. */ 2686 if (len >= 6 || l == 6) 2687 continue; 2688 if (debug) 2689 addlog(" [invalid]"); 2690 break; 2691 case LCP_OPT_MP_EID: 2692 if (len >= l && l >= 3) { 2693 switch (p[2]) { 2694 case 0: if (l==3+ 0) continue;break; 2695 case 2: if (l==3+ 4) continue;break; 2696 case 3: if (l==3+ 6) continue;break; 2697 case 6: if (l==3+16) continue;break; 2698 case 1: /* FALLTHROUGH */ 2699 case 4: if (l<=3+20) continue;break; 2700 case 5: if (l<=3+15) continue;break; 2701 /* XXX should it be default: continue;? */ 2702 } 2703 } 2704 if (debug) 2705 addlog(" [invalid class %d len %d]", p[2], l); 2706 break; 2707 case LCP_OPT_MP_SSNHF: 2708 if (len >= 2 && l == 2) { 2709 if (debug) 2710 addlog(" [rej]"); 2711 break; 2712 } 2713 if (debug) 2714 addlog(" [invalid]"); 2715 break; 2716 case LCP_OPT_MP_MRRU: 2717 /* Multilink maximum received reconstructed unit */ 2718 /* should be fall through, both are same length */ 2719 /* FALLTHROUGH */ 2720 case LCP_OPT_MRU: 2721 /* Maximum receive unit. */ 2722 if (len >= 4 && l == 4) 2723 continue; 2724 if (debug) 2725 addlog(" [invalid]"); 2726 break; 2727 case LCP_OPT_AUTH_PROTO: 2728 if (len < 4) { 2729 if (debug) 2730 addlog(" [invalid]"); 2731 break; 2732 } 2733 authproto = (p[2] << 8) + p[3]; 2734 if (authproto == PPP_CHAP && l != 5) { 2735 if (debug) 2736 addlog(" [invalid chap len]"); 2737 break; 2738 } 2739 if (ISSET(sp->myauth.flags, SPPP_AUTHFLAG_PASSIVEAUTHPROTO)) { 2740 if (authproto == PPP_PAP || authproto == PPP_CHAP) 2741 sp->myauth.proto = authproto; 2742 } 2743 if (sp->myauth.proto == 0) { 2744 /* we are not configured to do auth */ 2745 if (debug) 2746 addlog(" [not configured]"); 2747 break; 2748 } 2749 /* 2750 * Remote want us to authenticate, remember this, 2751 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2752 * up. 2753 */ 2754 sp->pp_flags |= PP_NEEDAUTH; 2755 continue; 2756 default: 2757 /* Others not supported. */ 2758 if (debug) 2759 addlog(" [rej]"); 2760 break; 2761 } 2762 if (rlen + l > blen) { 2763 if (debug) 2764 addlog(" [overflow]"); 2765 continue; 2766 } 2767 /* Add the option to rejected list. */ 2768 memcpy(r, p, l); 2769 r += l; 2770 rlen += l; 2771 } 2772 2773 if (rlen > 0) { 2774 type = CP_RCR_REJ; 2775 goto end; 2776 } 2777 2778 if (debug) 2779 addlog("\n"); 2780 2781 /* 2782 * pass 2: check for option values that are unacceptable and 2783 * thus require to be nak'ed. 2784 */ 2785 if (debug) 2786 log(LOG_DEBUG, "%s: lcp parse opt values: ", 2787 ifp->if_xname); 2788 2789 p = (void *)(h + 1); 2790 r = buf; 2791 rlen = 0; 2792 for (len = origlen; len > 0; len -= l, p += l) { 2793 l = p[1]; 2794 if (l == 0) 2795 break; 2796 2797 if (debug) 2798 addlog(" %s", sppp_lcp_opt_name(*p)); 2799 switch (p[0]) { 2800 case LCP_OPT_MAGIC: 2801 /* Magic number -- extract. */ 2802 nmagic = (uint32_t)p[2] << 24 | 2803 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2804 if (nmagic != sp->lcp.magic) { 2805 if (debug) 2806 addlog(" 0x%x", nmagic); 2807 continue; 2808 } 2809 /* 2810 * Local and remote magics equal -- loopback? 2811 */ 2812 if (sp->pp_loopcnt >= LOOPALIVECNT*5) { 2813 printf ("%s: loopback\n", 2814 ifp->if_xname); 2815 sp->pp_loopcnt = 0; 2816 if (ifp->if_flags & IFF_UP) { 2817 SPPP_UNLOCK(sp); 2818 if_down(ifp); 2819 SPPP_LOCK(sp, RW_WRITER); 2820 2821 IF_PURGE(&sp->pp_cpq); 2822 /* XXX ? */ 2823 sppp_wq_add(sp->wq_cp, 2824 &sp->scp[IDX_LCP].work_down); 2825 sppp_wq_add(sp->wq_cp, 2826 &sp->scp[IDX_LCP].work_up); 2827 } 2828 } else if (debug) 2829 addlog(" [glitch]"); 2830 ++sp->pp_loopcnt; 2831 /* 2832 * We negate our magic here, and NAK it. If 2833 * we see it later in an NAK packet, we 2834 * suggest a new one. 2835 */ 2836 nmagic = ~sp->lcp.magic; 2837 /* Gonna NAK it. */ 2838 p[2] = nmagic >> 24; 2839 p[3] = nmagic >> 16; 2840 p[4] = nmagic >> 8; 2841 p[5] = nmagic; 2842 break; 2843 2844 case LCP_OPT_ASYNC_MAP: 2845 /* 2846 * Async control character map -- just ignore it. 2847 * 2848 * Quote from RFC 1662, chapter 6: 2849 * To enable this functionality, synchronous PPP 2850 * implementations MUST always respond to the 2851 * Async-Control-Character-Map Configuration 2852 * Option with the LCP Configure-Ack. However, 2853 * acceptance of the Configuration Option does 2854 * not imply that the synchronous implementation 2855 * will do any ACCM mapping. Instead, all such 2856 * octet mapping will be performed by the 2857 * asynchronous-to-synchronous converter. 2858 */ 2859 continue; 2860 2861 case LCP_OPT_MRU: 2862 /* 2863 * Maximum receive unit. Always agreeable, 2864 * but ignored by now. 2865 */ 2866 sp->lcp.their_mru = p[2] * 256 + p[3]; 2867 if (debug) 2868 addlog(" %ld", sp->lcp.their_mru); 2869 continue; 2870 2871 case LCP_OPT_AUTH_PROTO: 2872 authproto = (p[2] << 8) + p[3]; 2873 if (ISSET(sp->myauth.flags, SPPP_AUTHFLAG_PASSIVEAUTHPROTO)) { 2874 if (authproto == PPP_PAP || authproto == PPP_CHAP) 2875 sp->myauth.proto = authproto; 2876 } 2877 if (sp->myauth.proto != authproto) { 2878 /* not agreed, nak */ 2879 if (debug) 2880 addlog(" [mine %s != his %s]", 2881 sppp_proto_name(sp->myauth.proto), 2882 sppp_proto_name(authproto)); 2883 p[2] = sp->myauth.proto >> 8; 2884 p[3] = sp->myauth.proto; 2885 break; 2886 } 2887 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2888 if (debug) 2889 addlog(" [chap not MD5]"); 2890 p[4] = CHAP_MD5; 2891 break; 2892 } 2893 continue; 2894 case LCP_OPT_MP_EID: 2895 /* 2896 * Endpoint identification. 2897 * Always agreeable, 2898 * but ignored by now. 2899 */ 2900 if (debug) { 2901 addlog(" type %d", p[2]); 2902 sppp_print_bytes(p+3, p[1]-3); 2903 } 2904 continue; 2905 case LCP_OPT_MP_MRRU: 2906 /* 2907 * Maximum received reconstructed unit. 2908 * Always agreeable, 2909 * but ignored by now. 2910 */ 2911 sp->lcp.their_mrru = p[2] * 256 + p[3]; 2912 if (debug) 2913 addlog(" %ld", sp->lcp.their_mrru); 2914 continue; 2915 } 2916 if (rlen + l > blen) { 2917 if (debug) 2918 addlog(" [overflow]"); 2919 continue; 2920 } 2921 /* Add the option to nak'ed list. */ 2922 memcpy(r, p, l); 2923 r += l; 2924 rlen += l; 2925 } 2926 2927 if (rlen > 0) { 2928 if (++sp->scp[IDX_LCP].fail_counter >= sp->lcp.max_failure) { 2929 if (debug) 2930 addlog(" max_failure (%d) exceeded, ", 2931 sp->lcp.max_failure); 2932 type = CP_RCR_REJ; 2933 } else { 2934 type = CP_RCR_NAK; 2935 } 2936 } else { 2937 type = CP_RCR_ACK; 2938 rlen = origlen; 2939 memcpy(r, h + 1, rlen); 2940 sp->scp[IDX_LCP].fail_counter = 0; 2941 sp->pp_loopcnt = 0; 2942 } 2943 2944 end: 2945 if (debug) 2946 addlog("\n"); 2947 2948 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 2949 if (buf != NULL) 2950 kmem_intr_free(buf, blen); 2951 } else { 2952 *msgbuf = buf; 2953 *buflen = blen; 2954 *msglen = rlen; 2955 } 2956 2957 return type; 2958 } 2959 2960 /* 2961 * Analyze the LCP Configure-Reject option list, and adjust our 2962 * negotiation. 2963 */ 2964 static void 2965 sppp_lcp_confrej(struct sppp *sp, struct lcp_header *h, int len) 2966 { 2967 STDDCL; 2968 u_char *p, l; 2969 2970 KASSERT(SPPP_WLOCKED(sp)); 2971 2972 if (len <= sizeof(*h)) 2973 return; 2974 2975 len -= sizeof(*h); 2976 2977 if (debug) 2978 log(LOG_DEBUG, "%s: lcp rej opts:", 2979 ifp->if_xname); 2980 2981 p = (void *)(h + 1); 2982 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2983 /* Sanity check option length */ 2984 if (l > len) { 2985 /* 2986 * Malicious option - drop immediately. 2987 * XXX Maybe we should just RXJ it? 2988 */ 2989 addlog("%s: received malicious LCP option, " 2990 "dropping.\n", ifp->if_xname); 2991 goto end; 2992 } 2993 if (debug) 2994 addlog(" %s", sppp_lcp_opt_name(*p)); 2995 switch (p[0]) { 2996 case LCP_OPT_MAGIC: 2997 /* Magic number -- can't use it, use 0 */ 2998 CLR(sp->lcp.opts, SPPP_LCP_OPT_MAGIC); 2999 sp->lcp.magic = 0; 3000 break; 3001 case LCP_OPT_MRU: 3002 /* 3003 * We try to negotiate a lower MRU if the underlying 3004 * link's MTU is less than PP_MTU (e.g. PPPoE). If the 3005 * peer rejects this lower rate, fallback to the 3006 * default. 3007 */ 3008 if (debug) { 3009 addlog("%s: warning: peer rejected our MRU of " 3010 "%ld bytes. Defaulting to %d bytes\n", 3011 ifp->if_xname, sp->lcp.mru, PP_MTU); 3012 } 3013 CLR(sp->lcp.opts, SPPP_LCP_OPT_MRU); 3014 sp->lcp.mru = PP_MTU; 3015 break; 3016 case LCP_OPT_AUTH_PROTO: 3017 /* 3018 * Peer doesn't want to authenticate himself, 3019 * deny unless this is a dialout call, and 3020 * SPPP_AUTHFLAG_NOCALLOUT is set. 3021 */ 3022 if ((sp->pp_flags & PP_CALLIN) == 0 && 3023 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 3024 if (debug) 3025 addlog(" [don't insist on auth " 3026 "for callout]"); 3027 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 3028 break; 3029 } 3030 if (debug) 3031 addlog("[access denied]\n"); 3032 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3033 break; 3034 } 3035 } 3036 if (debug) 3037 addlog("\n"); 3038 end: 3039 return; 3040 } 3041 3042 /* 3043 * Analyze the LCP Configure-NAK option list, and adjust our 3044 * negotiation. 3045 */ 3046 static void 3047 sppp_lcp_confnak(struct sppp *sp, struct lcp_header *h, int len) 3048 { 3049 STDDCL; 3050 u_char *p, l; 3051 uint32_t magic; 3052 3053 KASSERT(SPPP_WLOCKED(sp)); 3054 3055 if (len <= sizeof(*h)) 3056 return; 3057 len -= sizeof(*h); 3058 3059 if (debug) 3060 log(LOG_DEBUG, "%s: lcp nak opts:", 3061 ifp->if_xname); 3062 3063 p = (void *)(h + 1); 3064 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3065 /* Sanity check option length */ 3066 if (l > len) { 3067 /* 3068 * Malicious option - drop immediately. 3069 * XXX Maybe we should just RXJ it? 3070 */ 3071 addlog("%s: received malicious LCP option, " 3072 "dropping.\n", ifp->if_xname); 3073 goto end; 3074 } 3075 if (debug) 3076 addlog(" %s", sppp_lcp_opt_name(*p)); 3077 switch (p[0]) { 3078 case LCP_OPT_MAGIC: 3079 /* Magic number -- renegotiate */ 3080 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC) && 3081 len >= 6 && l == 6) { 3082 magic = (uint32_t)p[2] << 24 | 3083 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 3084 /* 3085 * If the remote magic is our negated one, 3086 * this looks like a loopback problem. 3087 * Suggest a new magic to make sure. 3088 */ 3089 if (magic == ~sp->lcp.magic) { 3090 if (debug) 3091 addlog(" magic glitch"); 3092 sp->lcp.magic = cprng_fast32(); 3093 } else { 3094 sp->lcp.magic = magic; 3095 if (debug) 3096 addlog(" %d", magic); 3097 } 3098 } 3099 break; 3100 case LCP_OPT_MRU: 3101 /* 3102 * Peer wants to advise us to negotiate an MRU. 3103 * Agree on it if it's reasonable, or use 3104 * default otherwise. 3105 */ 3106 if (len >= 4 && l == 4) { 3107 u_int mru = p[2] * 256 + p[3]; 3108 if (debug) 3109 addlog(" %d", mru); 3110 if (mru < PPP_MINMRU || mru > sp->pp_if.if_mtu) 3111 mru = sp->pp_if.if_mtu; 3112 sp->lcp.mru = mru; 3113 SET(sp->lcp.opts, SPPP_LCP_OPT_MRU); 3114 } 3115 break; 3116 case LCP_OPT_AUTH_PROTO: 3117 /* 3118 * Peer doesn't like our authentication method, 3119 * deny. 3120 */ 3121 if (debug) 3122 addlog("[access denied]\n"); 3123 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3124 break; 3125 } 3126 } 3127 if (debug) 3128 addlog("\n"); 3129 end: 3130 return; 3131 } 3132 3133 static void 3134 sppp_lcp_tlu(struct sppp *sp) 3135 { 3136 STDDCL; 3137 int i; 3138 3139 KASSERT(SPPP_WLOCKED(sp)); 3140 3141 /* unlock for IFNET_LOCK and if_up() */ 3142 SPPP_UNLOCK(sp); 3143 3144 /* XXX ? */ 3145 if (! (ifp->if_flags & IFF_UP) && 3146 (ifp->if_flags & IFF_RUNNING)) { 3147 /* Coming out of loopback mode. */ 3148 if_up(ifp); 3149 } 3150 3151 IFNET_LOCK(ifp); 3152 SPPP_LOCK(sp, RW_WRITER); 3153 3154 if (ifp->if_mtu > sp->lcp.their_mru) { 3155 sp->pp_saved_mtu = ifp->if_mtu; 3156 ifp->if_mtu = sp->lcp.their_mru; 3157 if (debug) { 3158 log(LOG_DEBUG, 3159 "%s: setting MTU " 3160 "from %"PRIu64" bytes " 3161 "to %"PRIu64" bytes\n", 3162 ifp->if_xname, sp->pp_saved_mtu, 3163 ifp->if_mtu); 3164 } 3165 } 3166 IFNET_UNLOCK(ifp); 3167 3168 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO) || 3169 (sp->pp_flags & PP_NEEDAUTH) != 0) 3170 sppp_change_phase(sp, SPPP_PHASE_AUTHENTICATE); 3171 else 3172 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 3173 3174 /* 3175 * Open all authentication protocols. This is even required 3176 * if we already proceeded to network phase, since it might be 3177 * that remote wants us to authenticate, so we might have to 3178 * send a PAP request. Undesired authentication protocols 3179 * don't do anything when they get an Open event. 3180 */ 3181 for (i = 0; i < IDX_COUNT; i++) 3182 if ((cps[i])->flags & CP_AUTH) { 3183 sppp_wq_add(sp->wq_cp, 3184 &sp->scp[(cps[i])->protoidx].work_open); 3185 } 3186 3187 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 3188 /* Notify all NCPs. */ 3189 for (i = 0; i < IDX_COUNT; i++) 3190 if ((cps[i])->flags & CP_NCP) { 3191 sppp_wq_add(sp->wq_cp, 3192 &sp->scp[(cps[i])->protoidx].work_open); 3193 } 3194 } 3195 3196 /* notify low-level driver of state change */ 3197 sppp_notify_chg_wlocked(sp); 3198 } 3199 3200 static void 3201 sppp_lcp_tld(struct sppp *sp) 3202 { 3203 STDDCL; 3204 int i, pi, phase; 3205 3206 KASSERT(SPPP_WLOCKED(sp)); 3207 3208 phase = sp->pp_phase; 3209 3210 sppp_change_phase(sp, SPPP_PHASE_TERMINATE); 3211 3212 if (sp->pp_saved_mtu > 0) { 3213 SPPP_UNLOCK(sp); 3214 IFNET_LOCK(ifp); 3215 SPPP_LOCK(sp, RW_WRITER); 3216 3217 if (debug) { 3218 log(LOG_DEBUG, 3219 "%s: setting MTU " 3220 "from %"PRIu64" bytes " 3221 "to %"PRIu64" bytes\n", 3222 ifp->if_xname, ifp->if_mtu, 3223 sp->pp_saved_mtu); 3224 } 3225 3226 ifp->if_mtu = sp->pp_saved_mtu; 3227 sp->pp_saved_mtu = 0; 3228 IFNET_UNLOCK(ifp); 3229 } 3230 3231 /* 3232 * Take upper layers down. We send the Down event first and 3233 * the Close second to prevent the upper layers from sending 3234 * ``a flurry of terminate-request packets'', as the RFC 3235 * describes it. 3236 */ 3237 for (i = 0; i < IDX_COUNT; i++) { 3238 pi = (cps[i])->protoidx; 3239 if (((cps[i])->flags & CP_LCP) == 0) { 3240 /* skip if ncp was not started */ 3241 if (phase != SPPP_PHASE_NETWORK && 3242 ((cps[i])->flags & CP_NCP) != 0) 3243 continue; 3244 3245 sppp_wq_add(sp->wq_cp, &sp->scp[pi].work_down); 3246 sppp_wq_add(sp->wq_cp, &sp->scp[pi].work_close); 3247 } 3248 } 3249 } 3250 3251 static void 3252 sppp_lcp_tls(const struct cp *cp __unused, struct sppp *sp) 3253 { 3254 3255 KASSERT(SPPP_WLOCKED(sp)); 3256 3257 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 3258 printf("%s: authentication failed %d times, not retrying again\n", 3259 sp->pp_if.if_xname, sp->pp_auth_failures); 3260 3261 SPPP_UNLOCK(sp); 3262 if_down(&sp->pp_if); 3263 SPPP_LOCK(sp, RW_WRITER); 3264 return; 3265 } 3266 3267 sppp_change_phase(sp, SPPP_PHASE_ESTABLISH); 3268 3269 /* Notify lower layer if desired. */ 3270 sppp_notify_tls_wlocked(sp); 3271 sp->lcp.tlf_sent = false; 3272 } 3273 3274 static void 3275 sppp_lcp_tlf(const struct cp *cp __unused, struct sppp *sp) 3276 { 3277 3278 KASSERT(SPPP_WLOCKED(sp)); 3279 3280 sppp_change_phase(sp, SPPP_PHASE_DEAD); 3281 3282 /* Notify lower layer if desired. */ 3283 sppp_notify_tlf_wlocked(sp); 3284 3285 switch (sp->scp[IDX_LCP].state) { 3286 case STATE_CLOSED: 3287 case STATE_STOPPED: 3288 sp->lcp.tlf_sent = true; 3289 break; 3290 case STATE_INITIAL: 3291 default: 3292 /* just in case */ 3293 sp->lcp.tlf_sent = false; 3294 } 3295 } 3296 3297 static void 3298 sppp_lcp_scr(struct sppp *sp) 3299 { 3300 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 3301 int i = 0; 3302 u_short authproto; 3303 3304 KASSERT(SPPP_WLOCKED(sp)); 3305 3306 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC)) { 3307 if (! sp->lcp.magic) 3308 sp->lcp.magic = cprng_fast32(); 3309 opt[i++] = LCP_OPT_MAGIC; 3310 opt[i++] = 6; 3311 opt[i++] = sp->lcp.magic >> 24; 3312 opt[i++] = sp->lcp.magic >> 16; 3313 opt[i++] = sp->lcp.magic >> 8; 3314 opt[i++] = sp->lcp.magic; 3315 } 3316 3317 if (ISSET(sp->lcp.opts,SPPP_LCP_OPT_MRU)) { 3318 opt[i++] = LCP_OPT_MRU; 3319 opt[i++] = 4; 3320 opt[i++] = sp->lcp.mru >> 8; 3321 opt[i++] = sp->lcp.mru; 3322 } 3323 3324 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO)) { 3325 authproto = sp->hisauth.proto; 3326 opt[i++] = LCP_OPT_AUTH_PROTO; 3327 opt[i++] = authproto == PPP_CHAP? 5: 4; 3328 opt[i++] = authproto >> 8; 3329 opt[i++] = authproto; 3330 if (authproto == PPP_CHAP) 3331 opt[i++] = CHAP_MD5; 3332 } 3333 3334 sp->scp[IDX_LCP].confid = ++sp->scp[IDX_LCP].seq; 3335 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->scp[IDX_LCP].confid, i, &opt); 3336 } 3337 3338 /* 3339 * Check the open NCPs, return true if at least one NCP is open. 3340 */ 3341 3342 static int 3343 sppp_cp_check(struct sppp *sp, u_char cp_flags) 3344 { 3345 int i, mask; 3346 3347 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 3348 if ((sp->lcp.protos & mask) && (cps[i])->flags & cp_flags) 3349 return 1; 3350 return 0; 3351 } 3352 3353 /* 3354 * Re-check the open NCPs and see if we should terminate the link. 3355 * Called by the NCPs during their tlf action handling. 3356 */ 3357 static void 3358 sppp_lcp_check_and_close(struct sppp *sp) 3359 { 3360 3361 KASSERT(SPPP_WLOCKED(sp)); 3362 3363 if (sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 3364 /* don't bother, we are already going down */ 3365 return; 3366 } 3367 3368 if (sp->pp_phase == SPPP_PHASE_AUTHENTICATE && 3369 sppp_cp_check(sp, CP_AUTH)) 3370 return; 3371 3372 if (sp->pp_phase >= SPPP_PHASE_NETWORK && 3373 sppp_cp_check(sp, CP_NCP)) 3374 return; 3375 3376 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3377 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 3378 } 3379 3380 /* 3381 *--------------------------------------------------------------------------* 3382 * * 3383 * The IPCP implementation. * 3384 * * 3385 *--------------------------------------------------------------------------* 3386 */ 3387 3388 static void 3389 sppp_ipcp_init(struct sppp *sp) 3390 { 3391 3392 KASSERT(SPPP_WLOCKED(sp)); 3393 3394 sppp_cp_init(&ipcp, sp); 3395 3396 sp->ipcp.opts = 0; 3397 sp->ipcp.flags = 0; 3398 } 3399 3400 static void 3401 sppp_ipcp_open(struct sppp *sp, void *xcp) 3402 { 3403 STDDCL; 3404 uint32_t myaddr, hisaddr; 3405 3406 KASSERT(SPPP_WLOCKED(sp)); 3407 KASSERT(!cpu_softintr_p()); 3408 3409 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 3410 sp->ipcp.req_myaddr = 0; 3411 sp->ipcp.req_hisaddr = 0; 3412 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 3413 3414 #ifdef INET 3415 kpreempt_disable(); 3416 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3417 kpreempt_enable(); 3418 #else 3419 myaddr = hisaddr = 0; 3420 #endif 3421 /* 3422 * If we don't have his address, this probably means our 3423 * interface doesn't want to talk IP at all. (This could 3424 * be the case if somebody wants to speak only IPX, for 3425 * example.) Don't open IPCP in this case. 3426 */ 3427 if (hisaddr == 0) { 3428 /* XXX this message should go away */ 3429 if (debug) 3430 log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n", 3431 ifp->if_xname); 3432 return; 3433 } 3434 3435 if (myaddr == 0) { 3436 /* 3437 * I don't have an assigned address, so i need to 3438 * negotiate my address. 3439 */ 3440 sp->ipcp.flags |= IPCP_MYADDR_DYN; 3441 SET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3442 } 3443 if (hisaddr == 1) { 3444 /* 3445 * XXX - remove this hack! 3446 * remote has no valid address, we need to get one assigned. 3447 */ 3448 sp->ipcp.flags |= IPCP_HISADDR_DYN; 3449 } 3450 3451 if (sp->query_dns & 1) { 3452 SET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3453 } else { 3454 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3455 } 3456 3457 if (sp->query_dns & 2) { 3458 SET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3459 } else { 3460 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3461 } 3462 sppp_open_event(sp, xcp); 3463 } 3464 3465 static void 3466 sppp_ipcp_close(struct sppp *sp, void *xcp) 3467 { 3468 3469 KASSERT(SPPP_WLOCKED(sp)); 3470 KASSERT(!cpu_softintr_p()); 3471 3472 sppp_close_event(sp, xcp); 3473 3474 #ifdef INET 3475 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 3476 /* 3477 * Some address was dynamic, clear it again. 3478 */ 3479 sppp_clear_ip_addrs(sp); 3480 #endif 3481 } 3482 3483 /* 3484 * Analyze a configure request. Return true if it was agreeable, and 3485 * caused action sca, false if it has been rejected or nak'ed, and 3486 * caused action scn. (The return value is used to make the state 3487 * transition decision in the state automaton.) 3488 */ 3489 static enum cp_rcr_type 3490 sppp_ipcp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 3491 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 3492 { 3493 u_char *buf, *r, *p, l, blen; 3494 enum cp_rcr_type type; 3495 struct ifnet *ifp = &sp->pp_if; 3496 int rlen, len, debug = ifp->if_flags & IFF_DEBUG; 3497 uint32_t hisaddr, desiredaddr; 3498 3499 KASSERT(SPPP_WLOCKED(sp)); 3500 3501 type = CP_RCR_NONE; 3502 origlen -= sizeof(*h); 3503 3504 if (origlen < 0) 3505 return CP_RCR_DROP; 3506 3507 /* 3508 * Make sure to allocate a buf that can at least hold a 3509 * conf-nak with an `address' option. We might need it below. 3510 */ 3511 blen = MAX(6, origlen); 3512 3513 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 3514 if (buf == NULL) 3515 return CP_RCR_DROP; 3516 3517 /* pass 1: see if we can recognize them */ 3518 if (debug) 3519 log(LOG_DEBUG, "%s: ipcp parse opts:", 3520 ifp->if_xname); 3521 p = (void *)(h + 1); 3522 r = buf; 3523 rlen = 0; 3524 for (len = origlen; len > 1; len -= l, p += l) { 3525 l = p[1]; 3526 if (l == 0) 3527 break; 3528 3529 /* Sanity check option length */ 3530 if (l > len) { 3531 /* XXX should we just RXJ? */ 3532 addlog("%s: malicious IPCP option received, dropping\n", 3533 ifp->if_xname); 3534 type = CP_RCR_ERR; 3535 goto end; 3536 } 3537 if (debug) 3538 addlog(" %s", sppp_ipcp_opt_name(*p)); 3539 switch (p[0]) { 3540 #ifdef notyet 3541 case IPCP_OPT_COMPRESSION: 3542 if (len >= 6 && l >= 6) { 3543 /* correctly formed compress option */ 3544 continue; 3545 } 3546 if (debug) 3547 addlog(" [invalid]"); 3548 break; 3549 #endif 3550 case IPCP_OPT_ADDRESS: 3551 if (len >= 6 && l == 6) { 3552 /* correctly formed address option */ 3553 continue; 3554 } 3555 if (debug) 3556 addlog(" [invalid]"); 3557 break; 3558 default: 3559 /* Others not supported. */ 3560 if (debug) 3561 addlog(" [rej]"); 3562 break; 3563 } 3564 /* Add the option to rejected list. */ 3565 if (rlen + l > blen) { 3566 if (debug) 3567 addlog(" [overflow]"); 3568 continue; 3569 } 3570 memcpy(r, p, l); 3571 r += l; 3572 rlen += l; 3573 } 3574 3575 if (rlen > 0) { 3576 type = CP_RCR_REJ; 3577 goto end; 3578 } 3579 3580 if (debug) 3581 addlog("\n"); 3582 3583 /* pass 2: parse option values */ 3584 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 3585 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 3586 else 3587 #ifdef INET 3588 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 3589 #else 3590 hisaddr = 0; 3591 #endif 3592 if (debug) 3593 log(LOG_DEBUG, "%s: ipcp parse opt values: ", 3594 ifp->if_xname); 3595 p = (void *)(h + 1); 3596 r = buf; 3597 rlen = 0; 3598 for (len = origlen; len > 1; len -= l, p += l) { 3599 l = p[1]; 3600 if (l == 0) 3601 break; 3602 3603 if (debug) 3604 addlog(" %s", sppp_ipcp_opt_name(*p)); 3605 switch (p[0]) { 3606 #ifdef notyet 3607 case IPCP_OPT_COMPRESSION: 3608 continue; 3609 #endif 3610 case IPCP_OPT_ADDRESS: 3611 desiredaddr = p[2] << 24 | p[3] << 16 | 3612 p[4] << 8 | p[5]; 3613 if (desiredaddr == hisaddr || 3614 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 3615 /* 3616 * Peer's address is same as our value, 3617 * this is agreeable. Gonna conf-ack 3618 * it. 3619 */ 3620 if (debug) 3621 addlog(" %s [ack]", 3622 sppp_dotted_quad(hisaddr)); 3623 /* record that we've seen it already */ 3624 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 3625 sp->ipcp.req_hisaddr = desiredaddr; 3626 hisaddr = desiredaddr; 3627 continue; 3628 } 3629 /* 3630 * The address wasn't agreeable. This is either 3631 * he sent us 0.0.0.0, asking to assign him an 3632 * address, or he send us another address not 3633 * matching our value. Either case, we gonna 3634 * conf-nak it with our value. 3635 */ 3636 if (debug) { 3637 if (desiredaddr == 0) 3638 addlog(" [addr requested]"); 3639 else 3640 addlog(" %s [not agreed]", 3641 sppp_dotted_quad(desiredaddr)); 3642 } 3643 3644 p[2] = hisaddr >> 24; 3645 p[3] = hisaddr >> 16; 3646 p[4] = hisaddr >> 8; 3647 p[5] = hisaddr; 3648 break; 3649 } 3650 if (rlen + l > blen) { 3651 if (debug) 3652 addlog(" [overflow]"); 3653 continue; 3654 } 3655 /* Add the option to nak'ed list. */ 3656 memcpy(r, p, l); 3657 r += l; 3658 rlen += l; 3659 } 3660 3661 if (rlen > 0) { 3662 type = CP_RCR_NAK; 3663 } else { 3664 if ((sp->ipcp.flags & IPCP_HISADDR_SEEN) == 0) { 3665 /* 3666 * If we are about to conf-ack the request, but haven't seen 3667 * his address so far, gonna conf-nak it instead, with the 3668 * `address' option present and our idea of his address being 3669 * filled in there, to request negotiation of both addresses. 3670 * 3671 * XXX This can result in an endless req - nak loop if peer 3672 * doesn't want to send us his address. Q: What should we do 3673 * about it? XXX A: implement the max-failure counter. 3674 */ 3675 buf[0] = IPCP_OPT_ADDRESS; 3676 buf[1] = 6; 3677 buf[2] = hisaddr >> 24; 3678 buf[3] = hisaddr >> 16; 3679 buf[4] = hisaddr >> 8; 3680 buf[5] = hisaddr; 3681 rlen = 6; 3682 if (debug) 3683 addlog(" still need hisaddr"); 3684 type = CP_RCR_NAK; 3685 } else { 3686 type = CP_RCR_ACK; 3687 rlen = origlen; 3688 memcpy(r, h + 1, rlen); 3689 } 3690 } 3691 3692 end: 3693 if (debug) 3694 addlog("\n"); 3695 3696 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 3697 if (buf != NULL) 3698 kmem_intr_free(buf, blen); 3699 } else { 3700 *msgbuf = buf; 3701 *buflen = blen; 3702 *msglen = rlen; 3703 } 3704 3705 return type; 3706 } 3707 3708 /* 3709 * Analyze the IPCP Configure-Reject option list, and adjust our 3710 * negotiation. 3711 */ 3712 static void 3713 sppp_ipcp_confrej(struct sppp *sp, struct lcp_header *h, int len) 3714 { 3715 u_char *p, l; 3716 struct ifnet *ifp = &sp->pp_if; 3717 int debug = ifp->if_flags & IFF_DEBUG; 3718 3719 KASSERT(SPPP_WLOCKED(sp)); 3720 3721 if (len <= sizeof(*h)) 3722 return; 3723 3724 len -= sizeof(*h); 3725 3726 if (debug) 3727 log(LOG_DEBUG, "%s: ipcp rej opts:", 3728 ifp->if_xname); 3729 3730 p = (void *)(h + 1); 3731 for (; len > 1; len -= l, p += l) { 3732 l = p[1]; 3733 if (l == 0) 3734 break; 3735 3736 /* Sanity check option length */ 3737 if (l > len) { 3738 /* XXX should we just RXJ? */ 3739 addlog("%s: malicious IPCP option received, dropping\n", 3740 ifp->if_xname); 3741 goto end; 3742 } 3743 if (debug) 3744 addlog(" %s", sppp_ipcp_opt_name(*p)); 3745 switch (p[0]) { 3746 case IPCP_OPT_ADDRESS: 3747 /* 3748 * Peer doesn't grok address option. This is 3749 * bad. XXX Should we better give up here? 3750 */ 3751 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3752 break; 3753 #ifdef notyet 3754 case IPCP_OPT_COMPRESS: 3755 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_COMPRESS); 3756 break; 3757 #endif 3758 case IPCP_OPT_PRIMDNS: 3759 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3760 break; 3761 3762 case IPCP_OPT_SECDNS: 3763 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3764 break; 3765 } 3766 } 3767 if (debug) 3768 addlog("\n"); 3769 end: 3770 return; 3771 } 3772 3773 /* 3774 * Analyze the IPCP Configure-NAK option list, and adjust our 3775 * negotiation. 3776 */ 3777 static void 3778 sppp_ipcp_confnak(struct sppp *sp, struct lcp_header *h, int len) 3779 { 3780 u_char *p, l; 3781 struct ifnet *ifp = &sp->pp_if; 3782 int debug = ifp->if_flags & IFF_DEBUG; 3783 uint32_t wantaddr; 3784 3785 KASSERT(SPPP_WLOCKED(sp)); 3786 3787 len -= sizeof(*h); 3788 3789 if (debug) 3790 log(LOG_DEBUG, "%s: ipcp nak opts:", 3791 ifp->if_xname); 3792 3793 p = (void *)(h + 1); 3794 for (; len > 1; len -= l, p += l) { 3795 l = p[1]; 3796 if (l == 0) 3797 break; 3798 3799 /* Sanity check option length */ 3800 if (l > len) { 3801 /* XXX should we just RXJ? */ 3802 addlog("%s: malicious IPCP option received, dropping\n", 3803 ifp->if_xname); 3804 return; 3805 } 3806 if (debug) 3807 addlog(" %s", sppp_ipcp_opt_name(*p)); 3808 switch (*p) { 3809 case IPCP_OPT_ADDRESS: 3810 /* 3811 * Peer doesn't like our local IP address. See 3812 * if we can do something for him. We'll drop 3813 * him our address then. 3814 */ 3815 if (len >= 6 && l == 6) { 3816 wantaddr = p[2] << 24 | p[3] << 16 | 3817 p[4] << 8 | p[5]; 3818 SET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3819 if (debug) 3820 addlog(" [wantaddr %s]", 3821 sppp_dotted_quad(wantaddr)); 3822 /* 3823 * When doing dynamic address assignment, 3824 * we accept his offer. Otherwise, we 3825 * ignore it and thus continue to negotiate 3826 * our already existing value. 3827 */ 3828 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3829 if (ntohl(wantaddr) != INADDR_ANY) { 3830 if (debug) 3831 addlog(" [agree]"); 3832 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3833 sp->ipcp.req_myaddr = wantaddr; 3834 } else { 3835 if (debug) 3836 addlog(" [not agreed]"); 3837 } 3838 } 3839 } 3840 break; 3841 3842 case IPCP_OPT_PRIMDNS: 3843 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS) && 3844 len >= 6 && l == 6) { 3845 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3846 p[4] << 8 | p[5]; 3847 } 3848 break; 3849 3850 case IPCP_OPT_SECDNS: 3851 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS) && 3852 len >= 6 && l == 6) { 3853 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3854 p[4] << 8 | p[5]; 3855 } 3856 break; 3857 #ifdef notyet 3858 case IPCP_OPT_COMPRESS: 3859 /* 3860 * Peer wants different compression parameters. 3861 */ 3862 break; 3863 #endif 3864 } 3865 } 3866 if (debug) 3867 addlog("\n"); 3868 } 3869 3870 static void 3871 sppp_ipcp_tlu(struct sppp *sp) 3872 { 3873 #ifdef INET 3874 struct ifnet *ifp; 3875 3876 ifp = &sp->pp_if; 3877 KASSERT(SPPP_WLOCKED(sp)); 3878 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && 3879 ((sp->ipcp.flags & IPCP_MYADDR_SEEN) == 0)) { 3880 log(LOG_WARNING, "%s: no IP address, closing IPCP\n", 3881 ifp->if_xname); 3882 sppp_wq_add(sp->wq_cp, 3883 &sp->scp[IDX_IPCP].work_close); 3884 } else { 3885 /* we are up. Set addresses and notify anyone interested */ 3886 sppp_set_ip_addrs(sp); 3887 } 3888 #endif 3889 } 3890 3891 static void 3892 sppp_ipcp_scr(struct sppp *sp) 3893 { 3894 uint8_t opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3895 #ifdef INET 3896 uint32_t ouraddr; 3897 #endif 3898 int i = 0; 3899 3900 KASSERT(SPPP_WLOCKED(sp)); 3901 3902 #ifdef notyet 3903 if (ISSET(sp->ipcp.opts,SPPP_IPCP_OPT_COMPRESSION)) { 3904 opt[i++] = IPCP_OPT_COMPRESSION; 3905 opt[i++] = 6; 3906 opt[i++] = 0; /* VJ header compression */ 3907 opt[i++] = 0x2d; /* VJ header compression */ 3908 opt[i++] = max_slot_id; 3909 opt[i++] = comp_slot_id; 3910 } 3911 #endif 3912 3913 #ifdef INET 3914 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS)) { 3915 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) { 3916 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3917 } else { 3918 kpreempt_disable(); 3919 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3920 kpreempt_enable(); 3921 } 3922 opt[i++] = IPCP_OPT_ADDRESS; 3923 opt[i++] = 6; 3924 opt[i++] = ouraddr >> 24; 3925 opt[i++] = ouraddr >> 16; 3926 opt[i++] = ouraddr >> 8; 3927 opt[i++] = ouraddr; 3928 } 3929 #endif 3930 3931 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS)) { 3932 opt[i++] = IPCP_OPT_PRIMDNS; 3933 opt[i++] = 6; 3934 opt[i++] = sp->dns_addrs[0] >> 24; 3935 opt[i++] = sp->dns_addrs[0] >> 16; 3936 opt[i++] = sp->dns_addrs[0] >> 8; 3937 opt[i++] = sp->dns_addrs[0]; 3938 } 3939 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS)) { 3940 opt[i++] = IPCP_OPT_SECDNS; 3941 opt[i++] = 6; 3942 opt[i++] = sp->dns_addrs[1] >> 24; 3943 opt[i++] = sp->dns_addrs[1] >> 16; 3944 opt[i++] = sp->dns_addrs[1] >> 8; 3945 opt[i++] = sp->dns_addrs[1]; 3946 } 3947 3948 sp->scp[IDX_IPCP].confid = ++sp->scp[IDX_IPCP].seq; 3949 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->scp[IDX_IPCP].confid, i, &opt); 3950 } 3951 3952 /* 3953 *--------------------------------------------------------------------------* 3954 * * 3955 * The IPv6CP implementation. * 3956 * * 3957 *--------------------------------------------------------------------------* 3958 */ 3959 3960 #ifdef INET6 3961 static void 3962 sppp_ipv6cp_init(struct sppp *sp) 3963 { 3964 3965 KASSERT(SPPP_WLOCKED(sp)); 3966 3967 sppp_cp_init(&ipv6cp, sp); 3968 3969 sp->ipv6cp.opts = 0; 3970 sp->ipv6cp.flags = 0; 3971 } 3972 3973 static void 3974 sppp_ipv6cp_open(struct sppp *sp, void *xcp) 3975 { 3976 STDDCL; 3977 struct in6_addr myaddr, hisaddr; 3978 3979 KASSERT(SPPP_WLOCKED(sp)); 3980 KASSERT(!cpu_softintr_p()); 3981 3982 #ifdef IPV6CP_MYIFID_DYN 3983 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3984 #else 3985 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3986 #endif 3987 3988 kpreempt_disable(); 3989 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3990 kpreempt_enable(); 3991 /* 3992 * If we don't have our address, this probably means our 3993 * interface doesn't want to talk IPv6 at all. (This could 3994 * be the case if somebody wants to speak only IPX, for 3995 * example.) Don't open IPv6CP in this case. 3996 */ 3997 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3998 /* XXX this message should go away */ 3999 if (debug) 4000 log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n", 4001 ifp->if_xname); 4002 return; 4003 } 4004 4005 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 4006 SET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 4007 sppp_open_event(sp, xcp); 4008 } 4009 4010 /* 4011 * Analyze a configure request. Return true if it was agreeable, and 4012 * caused action sca, false if it has been rejected or nak'ed, and 4013 * caused action scn. (The return value is used to make the state 4014 * transition decision in the state automaton.) 4015 */ 4016 static enum cp_rcr_type 4017 sppp_ipv6cp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 4018 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 4019 { 4020 u_char *buf, *r, *p, l, blen; 4021 struct ifnet *ifp = &sp->pp_if; 4022 int rlen, len, debug = ifp->if_flags & IFF_DEBUG; 4023 struct in6_addr myaddr, desiredaddr, suggestaddr; 4024 enum cp_rcr_type type; 4025 int ifidcount; 4026 int collision, nohisaddr; 4027 char ip6buf[INET6_ADDRSTRLEN]; 4028 4029 KASSERT(SPPP_WLOCKED(sp)); 4030 4031 type = CP_RCR_NONE; 4032 origlen -= sizeof(*h); 4033 4034 if (origlen < 0) 4035 return CP_RCR_DROP; 4036 4037 /* 4038 * Make sure to allocate a buf that can at least hold a 4039 * conf-nak with an `address' option. We might need it below. 4040 */ 4041 blen = MAX(6, origlen); 4042 4043 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 4044 if (buf == NULL) 4045 return CP_RCR_DROP; 4046 4047 /* pass 1: see if we can recognize them */ 4048 if (debug) 4049 log(LOG_DEBUG, "%s: ipv6cp parse opts:", 4050 ifp->if_xname); 4051 p = (void *)(h + 1); 4052 r = buf; 4053 rlen = 0; 4054 ifidcount = 0; 4055 for (len = origlen; len > 1; len -= l, p += l) { 4056 l = p[1]; 4057 if (l == 0) 4058 break; 4059 4060 /* Sanity check option length */ 4061 if (l > len) { 4062 /* XXX just RXJ? */ 4063 addlog("%s: received malicious IPCPv6 option, " 4064 "dropping\n", ifp->if_xname); 4065 type = CP_RCR_ERR; 4066 goto end; 4067 } 4068 if (debug) 4069 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4070 switch (p[0]) { 4071 case IPV6CP_OPT_IFID: 4072 if (len >= 10 && l == 10 && ifidcount == 0) { 4073 /* correctly formed address option */ 4074 ifidcount++; 4075 continue; 4076 } 4077 if (debug) 4078 addlog(" [invalid]"); 4079 break; 4080 #ifdef notyet 4081 case IPV6CP_OPT_COMPRESSION: 4082 if (len >= 4 && l >= 4) { 4083 /* correctly formed compress option */ 4084 continue; 4085 } 4086 if (debug) 4087 addlog(" [invalid]"); 4088 break; 4089 #endif 4090 default: 4091 /* Others not supported. */ 4092 if (debug) 4093 addlog(" [rej]"); 4094 break; 4095 } 4096 if (rlen + l > blen) { 4097 if (debug) 4098 addlog(" [overflow]"); 4099 continue; 4100 } 4101 /* Add the option to rejected list. */ 4102 memcpy(r, p, l); 4103 r += l; 4104 rlen += l; 4105 } 4106 4107 if (rlen > 0) { 4108 type = CP_RCR_REJ; 4109 goto end; 4110 } 4111 4112 if (debug) 4113 addlog("\n"); 4114 4115 /* pass 2: parse option values */ 4116 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4117 if (debug) 4118 log(LOG_DEBUG, "%s: ipv6cp parse opt values: ", 4119 ifp->if_xname); 4120 p = (void *)(h + 1); 4121 r = buf; 4122 rlen = 0; 4123 type = CP_RCR_ACK; 4124 for (len = origlen; len > 1; len -= l, p += l) { 4125 l = p[1]; 4126 if (l == 0) 4127 break; 4128 4129 if (debug) 4130 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4131 switch (p[0]) { 4132 #ifdef notyet 4133 case IPV6CP_OPT_COMPRESSION: 4134 continue; 4135 #endif 4136 case IPV6CP_OPT_IFID: 4137 memset(&desiredaddr, 0, sizeof(desiredaddr)); 4138 memcpy(&desiredaddr.s6_addr[8], &p[2], 8); 4139 collision = (memcmp(&desiredaddr.s6_addr[8], 4140 &myaddr.s6_addr[8], 8) == 0); 4141 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 4142 4143 desiredaddr.s6_addr16[0] = htons(0xfe80); 4144 (void)in6_setscope(&desiredaddr, &sp->pp_if, NULL); 4145 4146 if (!collision && !nohisaddr) { 4147 /* no collision, hisaddr known - Conf-Ack */ 4148 type = CP_RCR_ACK; 4149 memcpy(sp->ipv6cp.my_ifid, &myaddr.s6_addr[8], 4150 sizeof(sp->ipv6cp.my_ifid)); 4151 memcpy(sp->ipv6cp.his_ifid, 4152 &desiredaddr.s6_addr[8], 4153 sizeof(sp->ipv6cp.my_ifid)); 4154 4155 if (debug) { 4156 addlog(" %s [%s]", 4157 IN6_PRINT(ip6buf, &desiredaddr), 4158 sppp_cp_type_name(CONF_ACK)); 4159 } 4160 continue; 4161 } 4162 4163 memset(&suggestaddr, 0, sizeof(suggestaddr)); 4164 if (collision && nohisaddr) { 4165 /* collision, hisaddr unknown - Conf-Rej */ 4166 type = CP_RCR_REJ; 4167 memset(&p[2], 0, 8); 4168 } else { 4169 /* 4170 * - no collision, hisaddr unknown, or 4171 * - collision, hisaddr known 4172 * Conf-Nak, suggest hisaddr 4173 */ 4174 type = CP_RCR_NAK; 4175 sppp_suggest_ip6_addr(sp, &suggestaddr); 4176 memcpy(&p[2], &suggestaddr.s6_addr[8], 8); 4177 } 4178 if (debug) { 4179 int ctype = type == CP_RCR_REJ ? CONF_REJ : CONF_NAK; 4180 addlog(" %s [%s]", IN6_PRINT(ip6buf, &desiredaddr), 4181 sppp_cp_type_name(ctype)); 4182 } 4183 break; 4184 } 4185 if (rlen + l > blen) { 4186 if (debug) 4187 addlog(" [overflow]"); 4188 continue; 4189 } 4190 /* Add the option to nak'ed list. */ 4191 memcpy(r, p, l); 4192 r += l; 4193 rlen += l; 4194 } 4195 4196 if (rlen > 0) { 4197 if (type != CP_RCR_ACK) { 4198 if (debug) { 4199 int ctype ; 4200 ctype = type == CP_RCR_REJ ? 4201 CONF_REJ : CONF_NAK; 4202 addlog(" send %s suggest %s\n", 4203 sppp_cp_type_name(ctype), 4204 IN6_PRINT(ip6buf, &suggestaddr)); 4205 } 4206 } 4207 #ifdef notdef 4208 if (type == CP_RCR_ACK) 4209 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 4210 #endif 4211 } else { 4212 if (type == CP_RCR_ACK) { 4213 rlen = origlen; 4214 memcpy(r, h + 1, rlen); 4215 } 4216 } 4217 end: 4218 if (debug) 4219 addlog("\n"); 4220 4221 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 4222 if (buf != NULL) 4223 kmem_intr_free(buf, blen); 4224 } else { 4225 *msgbuf = buf; 4226 *buflen = blen; 4227 *msglen = rlen; 4228 } 4229 4230 return type; 4231 } 4232 4233 /* 4234 * Analyze the IPv6CP Configure-Reject option list, and adjust our 4235 * negotiation. 4236 */ 4237 static void 4238 sppp_ipv6cp_confrej(struct sppp *sp, struct lcp_header *h, int len) 4239 { 4240 u_char *p, l; 4241 struct ifnet *ifp = &sp->pp_if; 4242 int debug = ifp->if_flags & IFF_DEBUG; 4243 4244 KASSERT(SPPP_WLOCKED(sp)); 4245 4246 if (len <= sizeof(*h)) 4247 return; 4248 4249 len -= sizeof(*h); 4250 4251 if (debug) 4252 log(LOG_DEBUG, "%s: ipv6cp rej opts:", 4253 ifp->if_xname); 4254 4255 p = (void *)(h + 1); 4256 for (; len > 1; len -= l, p += l) { 4257 l = p[1]; 4258 if (l == 0) 4259 break; 4260 4261 if (l > len) { 4262 /* XXX just RXJ? */ 4263 addlog("%s: received malicious IPCPv6 option, " 4264 "dropping\n", ifp->if_xname); 4265 goto end; 4266 } 4267 if (debug) 4268 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4269 switch (p[0]) { 4270 case IPV6CP_OPT_IFID: 4271 /* 4272 * Peer doesn't grok address option. This is 4273 * bad. XXX Should we better give up here? 4274 */ 4275 CLR(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 4276 break; 4277 #ifdef notyet 4278 case IPV6CP_OPT_COMPRESS: 4279 CLR(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_COMPRESS); 4280 break; 4281 #endif 4282 } 4283 } 4284 if (debug) 4285 addlog("\n"); 4286 end: 4287 return; 4288 } 4289 4290 /* 4291 * Analyze the IPv6CP Configure-NAK option list, and adjust our 4292 * negotiation. 4293 */ 4294 static void 4295 sppp_ipv6cp_confnak(struct sppp *sp, struct lcp_header *h, int len) 4296 { 4297 u_char *p, l; 4298 struct ifnet *ifp = &sp->pp_if; 4299 int debug = ifp->if_flags & IFF_DEBUG; 4300 struct in6_addr suggestaddr; 4301 char ip6buf[INET6_ADDRSTRLEN]; 4302 4303 KASSERT(SPPP_WLOCKED(sp)); 4304 4305 if (len <= sizeof(*h)) 4306 return; 4307 4308 len -= sizeof(*h); 4309 4310 if (debug) 4311 log(LOG_DEBUG, "%s: ipv6cp nak opts:", 4312 ifp->if_xname); 4313 4314 p = (void *)(h + 1); 4315 for (; len > 1; len -= l, p += l) { 4316 l = p[1]; 4317 if (l == 0) 4318 break; 4319 4320 if (l > len) { 4321 /* XXX just RXJ? */ 4322 addlog("%s: received malicious IPCPv6 option, " 4323 "dropping\n", ifp->if_xname); 4324 goto end; 4325 } 4326 if (debug) 4327 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4328 switch (p[0]) { 4329 case IPV6CP_OPT_IFID: 4330 /* 4331 * Peer doesn't like our local ifid. See 4332 * if we can do something for him. We'll drop 4333 * him our address then. 4334 */ 4335 if (len < 10 || l != 10) 4336 break; 4337 memset(&suggestaddr, 0, sizeof(suggestaddr)); 4338 suggestaddr.s6_addr16[0] = htons(0xfe80); 4339 (void)in6_setscope(&suggestaddr, &sp->pp_if, NULL); 4340 memcpy(&suggestaddr.s6_addr[8], &p[2], 8); 4341 4342 SET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 4343 if (debug) 4344 addlog(" [suggestaddr %s]", 4345 IN6_PRINT(ip6buf, &suggestaddr)); 4346 #ifdef IPV6CP_MYIFID_DYN 4347 /* 4348 * When doing dynamic address assignment, 4349 * we accept his offer. 4350 */ 4351 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 4352 struct in6_addr lastsuggest; 4353 /* 4354 * If <suggested myaddr from peer> equals to 4355 * <hisaddr we have suggested last time>, 4356 * we have a collision. generate new random 4357 * ifid. 4358 */ 4359 sppp_suggest_ip6_addr(&lastsuggest); 4360 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 4361 lastsuggest)) { 4362 if (debug) 4363 addlog(" [random]"); 4364 sppp_gen_ip6_addr(sp, &suggestaddr); 4365 } 4366 sppp_set_ip6_addr(sp, &suggestaddr, 0); 4367 if (debug) 4368 addlog(" [agree]"); 4369 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 4370 } 4371 #else 4372 /* 4373 * Since we do not do dynamic address assignment, 4374 * we ignore it and thus continue to negotiate 4375 * our already existing value. This can possibly 4376 * go into infinite request-reject loop. 4377 * 4378 * This is not likely because we normally use 4379 * ifid based on MAC-address. 4380 * If you have no ethernet card on the node, too bad. 4381 * XXX should we use fail_counter? 4382 */ 4383 #endif 4384 break; 4385 #ifdef notyet 4386 case IPV6CP_OPT_COMPRESS: 4387 /* 4388 * Peer wants different compression parameters. 4389 */ 4390 break; 4391 #endif 4392 } 4393 } 4394 if (debug) 4395 addlog("\n"); 4396 end: 4397 return; 4398 } 4399 4400 static void 4401 sppp_ipv6cp_tlu(struct sppp *sp) 4402 { 4403 4404 KASSERT(SPPP_WLOCKED(sp)); 4405 /* we are up - notify isdn daemon */ 4406 sppp_notify_con_wlocked(sp); 4407 } 4408 4409 static void 4410 sppp_ipv6cp_scr(struct sppp *sp) 4411 { 4412 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 4413 struct in6_addr ouraddr; 4414 int i = 0; 4415 4416 KASSERT(SPPP_WLOCKED(sp)); 4417 4418 if (ISSET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID)) { 4419 kpreempt_disable(); 4420 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 4421 kpreempt_enable(); 4422 4423 opt[i++] = IPV6CP_OPT_IFID; 4424 opt[i++] = 10; 4425 memcpy(&opt[i], &ouraddr.s6_addr[8], 8); 4426 i += 8; 4427 } 4428 4429 #ifdef notyet 4430 if (ISSET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_COMPRESSION)) { 4431 opt[i++] = IPV6CP_OPT_COMPRESSION; 4432 opt[i++] = 4; 4433 opt[i++] = 0; /* TBD */ 4434 opt[i++] = 0; /* TBD */ 4435 /* variable length data may follow */ 4436 } 4437 #endif 4438 4439 sp->scp[IDX_IPV6CP].confid = ++sp->scp[IDX_IPV6CP].seq; 4440 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->scp[IDX_IPV6CP].confid, i, &opt); 4441 } 4442 #else /*INET6*/ 4443 static void 4444 sppp_ipv6cp_init(struct sppp *sp) 4445 { 4446 4447 KASSERT(SPPP_WLOCKED(sp)); 4448 } 4449 4450 static void 4451 sppp_ipv6cp_open(struct sppp *sp, void *xcp) 4452 { 4453 4454 KASSERT(SPPP_WLOCKED(sp)); 4455 } 4456 4457 static enum cp_rcr_type 4458 sppp_ipv6cp_confreq(struct sppp *sp, struct lcp_header *h, 4459 int len, uint8_t **msgbuf, size_t *buflen, size_t *msglen) 4460 { 4461 4462 KASSERT(SPPP_WLOCKED(sp)); 4463 return 0; 4464 } 4465 4466 static void 4467 sppp_ipv6cp_confrej(struct sppp *sp, struct lcp_header *h, 4468 int len) 4469 { 4470 4471 KASSERT(SPPP_WLOCKED(sp)); 4472 } 4473 4474 static void 4475 sppp_ipv6cp_confnak(struct sppp *sp, struct lcp_header *h, 4476 int len) 4477 { 4478 4479 KASSERT(SPPP_WLOCKED(sp)); 4480 } 4481 4482 static void 4483 sppp_ipv6cp_tlu(struct sppp *sp) 4484 { 4485 4486 KASSERT(SPPP_WLOCKED(sp)); 4487 } 4488 4489 static void 4490 sppp_ipv6cp_scr(struct sppp *sp) 4491 { 4492 4493 KASSERT(SPPP_WLOCKED(sp)); 4494 } 4495 #endif /*INET6*/ 4496 4497 /* 4498 *--------------------------------------------------------------------------* 4499 * * 4500 * The CHAP implementation. * 4501 * * 4502 *--------------------------------------------------------------------------* 4503 */ 4504 /* 4505 * The authentication protocols is implemented on the state machine for 4506 * control protocols. And it uses following actions and events. 4507 * 4508 * Actions: 4509 * - scr: send CHAP_CHALLENGE and CHAP_RESPONSE 4510 * - sca: send CHAP_SUCCESS 4511 * - scn: send CHAP_FAILURE and shutdown lcp 4512 * Events: 4513 * - RCR+: receive CHAP_RESPONSE containing correct digest 4514 * - RCR-: receive CHAP_RESPONSE containing wrong digest 4515 * - RCA: receive CHAP_SUCCESS 4516 * - RCN: (this event is unused) 4517 * - TO+: re-send CHAP_CHALLENGE and CHAP_RESPONSE 4518 * - TO-: this layer finish 4519 */ 4520 4521 /* 4522 * Handle incoming CHAP packets. 4523 */ 4524 void 4525 sppp_chap_input(struct sppp *sp, struct mbuf *m) 4526 { 4527 STDDCL; 4528 struct lcp_header *h; 4529 int len, x; 4530 u_char *value, *name, digest[sizeof(sp->chap.challenge)]; 4531 int value_len, name_len; 4532 MD5_CTX ctx; 4533 4534 len = m->m_pkthdr.len; 4535 if (len < 4) { 4536 if (debug) 4537 log(LOG_DEBUG, 4538 "%s: chap invalid packet length: %d bytes\n", 4539 ifp->if_xname, len); 4540 return; 4541 } 4542 h = mtod(m, struct lcp_header *); 4543 if (len > ntohs(h->len)) 4544 len = ntohs(h->len); 4545 4546 SPPP_LOCK(sp, RW_WRITER); 4547 4548 switch (h->type) { 4549 /* challenge, failure and success are his authproto */ 4550 case CHAP_CHALLENGE: 4551 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4552 /* can't do anything useful */ 4553 sp->pp_auth_failures++; 4554 printf("%s: chap input without my name and my secret being set\n", 4555 ifp->if_xname); 4556 break; 4557 } 4558 value = 1 + (u_char *)(h + 1); 4559 value_len = value[-1]; 4560 name = value + value_len; 4561 name_len = len - value_len - 5; 4562 if (name_len < 0) { 4563 if (debug) { 4564 log(LOG_DEBUG, 4565 "%s: chap corrupted challenge " 4566 "<%s id=0x%x len=%d", 4567 ifp->if_xname, 4568 sppp_auth_type_name(PPP_CHAP, h->type), 4569 h->ident, ntohs(h->len)); 4570 if (len > 4) 4571 sppp_print_bytes((u_char *)(h + 1), 4572 len - 4); 4573 addlog(">\n"); 4574 } 4575 break; 4576 } 4577 4578 if (debug) { 4579 log(LOG_DEBUG, 4580 "%s: chap input <%s id=0x%x len=%d name=", 4581 ifp->if_xname, 4582 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 4583 ntohs(h->len)); 4584 sppp_print_string((char *) name, name_len); 4585 addlog(" value-size=%d value=", value_len); 4586 sppp_print_bytes(value, value_len); 4587 addlog(">\n"); 4588 } 4589 4590 /* Compute reply value. */ 4591 MD5Init(&ctx); 4592 MD5Update(&ctx, &h->ident, 1); 4593 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 4594 MD5Update(&ctx, value, value_len); 4595 MD5Final(sp->chap.digest, &ctx); 4596 sp->chap.digest_len = sizeof(sp->chap.digest); 4597 sp->scp[IDX_CHAP].rconfid = h->ident; 4598 4599 sppp_wq_add(sp->wq_cp, &sp->chap.work_challenge_rcvd); 4600 break; 4601 4602 case CHAP_SUCCESS: 4603 if (debug) { 4604 log(LOG_DEBUG, "%s: chap success", 4605 ifp->if_xname); 4606 if (len > 4) { 4607 addlog(": "); 4608 sppp_print_string((char *)(h + 1), len - 4); 4609 } 4610 addlog("\n"); 4611 } 4612 4613 if (h->ident != sp->scp[IDX_CHAP].rconfid) { 4614 if (debug) { 4615 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4616 ifp->if_xname, chap.name, 4617 h->ident, sp->scp[IDX_CHAP].rconfid); 4618 } 4619 if_statinc(ifp, if_ierrors); 4620 break; 4621 } 4622 4623 if (sp->chap.digest_len == 0) { 4624 if (debug) { 4625 log(LOG_DEBUG, 4626 "%s: receive CHAP success without challenge\n", 4627 ifp->if_xname); 4628 } 4629 if_statinc(ifp, if_ierrors); 4630 break; 4631 } 4632 4633 x = splnet(); 4634 sp->pp_auth_failures = 0; 4635 sp->pp_flags &= ~PP_NEEDAUTH; 4636 splx(x); 4637 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4638 sp->chap.digest_len = 0; 4639 4640 if (!ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_SERV)) { 4641 /* 4642 * we are not authenticator for CHAP, 4643 * generate a dummy RCR+ event without CHAP_RESPONSE 4644 */ 4645 sp->scp[IDX_CHAP].rcr_type = CP_RCR_ACK; 4646 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4647 } 4648 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rca); 4649 break; 4650 4651 case CHAP_FAILURE: 4652 if (h->ident != sp->scp[IDX_CHAP].rconfid) { 4653 if (debug) { 4654 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4655 ifp->if_xname, chap.name, 4656 h->ident, sp->scp[IDX_CHAP].rconfid); 4657 } 4658 if_statinc(ifp, if_ierrors); 4659 break; 4660 } 4661 4662 if (sp->chap.digest_len == 0) { 4663 if (debug) { 4664 log(LOG_DEBUG, 4665 "%s: receive CHAP failure without challenge\n", 4666 ifp->if_xname); 4667 } 4668 if_statinc(ifp, if_ierrors); 4669 break; 4670 } 4671 4672 x = splnet(); 4673 sp->pp_auth_failures++; 4674 splx(x); 4675 if (debug) { 4676 log(LOG_INFO, "%s: chap failure", 4677 ifp->if_xname); 4678 if (len > 4) { 4679 addlog(": "); 4680 sppp_print_string((char *)(h + 1), len - 4); 4681 } 4682 addlog("\n"); 4683 } else 4684 log(LOG_INFO, "%s: chap failure\n", 4685 ifp->if_xname); 4686 4687 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4688 sp->chap.digest_len = 0; 4689 /* 4690 * await LCP shutdown by authenticator, 4691 * so we don't have to enqueue sc->scp[IDX_CHAP].work_rcn 4692 */ 4693 break; 4694 4695 /* response is my authproto */ 4696 case CHAP_RESPONSE: 4697 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4698 /* can't do anything useful */ 4699 printf("%s: chap response" 4700 " without his name and his secret being set\n", 4701 ifp->if_xname); 4702 break; 4703 } 4704 value = 1 + (u_char *)(h + 1); 4705 value_len = value[-1]; 4706 name = value + value_len; 4707 name_len = len - value_len - 5; 4708 if (name_len < 0) { 4709 if (debug) { 4710 log(LOG_DEBUG, 4711 "%s: chap corrupted response " 4712 "<%s id=0x%x len=%d", 4713 ifp->if_xname, 4714 sppp_auth_type_name(PPP_CHAP, h->type), 4715 h->ident, ntohs(h->len)); 4716 if (len > 4) 4717 sppp_print_bytes((u_char *)(h + 1), 4718 len - 4); 4719 addlog(">\n"); 4720 } 4721 break; 4722 } 4723 if (h->ident != sp->scp[IDX_CHAP].confid) { 4724 if (debug) 4725 log(LOG_DEBUG, 4726 "%s: chap dropping response for old ID " 4727 "(got %d, expected %d)\n", 4728 ifp->if_xname, 4729 h->ident, sp->scp[IDX_CHAP].confid); 4730 break; 4731 } else { 4732 sp->scp[IDX_CHAP].rconfid = h->ident; 4733 } 4734 4735 if (sp->hisauth.name != NULL && 4736 (name_len != sp->hisauth.name_len 4737 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 4738 log(LOG_INFO, "%s: chap response, his name ", 4739 ifp->if_xname); 4740 sppp_print_string(name, name_len); 4741 addlog(" != expected "); 4742 sppp_print_string(sp->hisauth.name, 4743 sp->hisauth.name_len); 4744 addlog("\n"); 4745 4746 /* generate RCR- event */ 4747 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4748 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4749 break; 4750 } 4751 4752 if (debug) { 4753 log(LOG_DEBUG, "%s: chap input(%s) " 4754 "<%s id=0x%x len=%d name=", 4755 ifp->if_xname, 4756 sppp_state_name(sp->scp[IDX_CHAP].state), 4757 sppp_auth_type_name(PPP_CHAP, h->type), 4758 h->ident, ntohs(h->len)); 4759 sppp_print_string((char *)name, name_len); 4760 addlog(" value-size=%d value=", value_len); 4761 sppp_print_bytes(value, value_len); 4762 addlog(">\n"); 4763 } 4764 4765 if (value_len == sizeof(sp->chap.challenge) && 4766 value_len == sizeof(sp->chap.digest)) { 4767 MD5Init(&ctx); 4768 MD5Update(&ctx, &h->ident, 1); 4769 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 4770 MD5Update(&ctx, sp->chap.challenge, sizeof(sp->chap.challenge)); 4771 MD5Final(digest, &ctx); 4772 4773 if (memcmp(digest, value, value_len) == 0) { 4774 sp->scp[IDX_CHAP].rcr_type = CP_RCR_ACK; 4775 if (!ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_PEER) || 4776 sp->chap.rechallenging) { 4777 /* generate a dummy RCA event*/ 4778 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rca); 4779 } 4780 } else { 4781 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4782 } 4783 } else { 4784 if (debug) 4785 log(LOG_DEBUG, 4786 "%s: chap bad hash value length: " 4787 "%d bytes, should be %zu\n", 4788 ifp->if_xname, value_len, 4789 sizeof(sp->chap.challenge)); 4790 4791 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4792 } 4793 4794 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4795 break; 4796 4797 default: 4798 /* Unknown CHAP packet type -- ignore. */ 4799 if (debug) { 4800 log(LOG_DEBUG, "%s: chap unknown input(%s) " 4801 "<0x%x id=0x%xh len=%d", 4802 ifp->if_xname, 4803 sppp_state_name(sp->scp[IDX_CHAP].state), 4804 h->type, h->ident, ntohs(h->len)); 4805 if (len > 4) 4806 sppp_print_bytes((u_char *)(h + 1), len - 4); 4807 addlog(">\n"); 4808 } 4809 break; 4810 4811 } 4812 4813 SPPP_UNLOCK(sp); 4814 } 4815 4816 static void 4817 sppp_chap_init(struct sppp *sp) 4818 { 4819 4820 KASSERT(SPPP_WLOCKED(sp)); 4821 4822 sppp_cp_init(&chap, sp); 4823 4824 SPPP_WQ_SET(&sp->chap.work_challenge_rcvd, 4825 sppp_chap_rcv_challenge_event, &chap); 4826 } 4827 4828 static void 4829 sppp_chap_open(struct sppp *sp, void *xcp) 4830 { 4831 4832 KASSERT(SPPP_WLOCKED(sp)); 4833 4834 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4835 sp->chap.digest_len = 0; 4836 sp->chap.rechallenging = false; 4837 sp->chap.response_rcvd = false; 4838 sppp_open_event(sp, xcp); 4839 } 4840 4841 static void 4842 sppp_chap_tlu(struct sppp *sp) 4843 { 4844 STDDCL; 4845 int i, x; 4846 4847 KASSERT(SPPP_WLOCKED(sp)); 4848 4849 i = 0; 4850 sp->scp[IDX_CHAP].rst_counter = sp->lcp.max_configure; 4851 x = splnet(); 4852 sp->pp_auth_failures = 0; 4853 splx(x); 4854 4855 log(LOG_DEBUG, "%s: chap %s", ifp->if_xname, 4856 sp->pp_phase == SPPP_PHASE_NETWORK ? "reconfirmed" : "tlu"); 4857 4858 /* 4859 * Some broken CHAP implementations (Conware CoNet, firmware 4860 * 4.0.?) don't want to re-authenticate their CHAP once the 4861 * initial challenge-response exchange has taken place. 4862 * Provide for an option to avoid rechallenges. 4863 */ 4864 if (ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_SERV) && 4865 (sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4866 /* 4867 * Compute the re-challenge timeout. This will yield 4868 * a number between 300 and 810 seconds. 4869 */ 4870 i = 300 + ((unsigned)(cprng_fast32() & 0xff00) >> 7); 4871 callout_schedule(&sp->scp[IDX_CHAP].ch, i * hz); 4872 4873 if (debug) { 4874 addlog(", next rechallenge in %d seconds", i); 4875 } 4876 } 4877 4878 addlog("\n"); 4879 4880 /* 4881 * If we are already in phase network, we are done here. This 4882 * is the case if this is a dummy tlu event after a re-challenge. 4883 */ 4884 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4885 sppp_phase_network(sp); 4886 } 4887 4888 static void 4889 sppp_chap_scr(struct sppp *sp) 4890 { 4891 uint32_t *ch; 4892 u_char clen, dsize; 4893 int role; 4894 4895 KASSERT(SPPP_WLOCKED(sp)); 4896 4897 role = sppp_auth_role(&chap, sp); 4898 4899 if (ISSET(role, SPPP_AUTH_SERV) && 4900 !sp->chap.response_rcvd) { 4901 /* we are authenticator for CHAP, send challenge */ 4902 ch = (uint32_t *)sp->chap.challenge; 4903 clen = sizeof(sp->chap.challenge); 4904 /* Compute random challenge. */ 4905 cprng_strong(kern_cprng, ch, clen, 0); 4906 4907 sp->scp[IDX_CHAP].confid = ++sp->scp[IDX_CHAP].seq; 4908 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->scp[IDX_CHAP].confid, 4909 sizeof(clen), (const char *)&clen, 4910 sizeof(sp->chap.challenge), sp->chap.challenge, 4911 0); 4912 } 4913 4914 if (ISSET(role, SPPP_AUTH_PEER) && 4915 sp->chap.digest_len > 0) { 4916 /* we are peer for CHAP, send response */ 4917 dsize = sp->chap.digest_len; 4918 4919 sppp_auth_send(&chap, sp, CHAP_RESPONSE, sp->scp[IDX_CHAP].rconfid, 4920 sizeof(dsize), (const char *)&dsize, 4921 sp->chap.digest_len, sp->chap.digest, 4922 sp->myauth.name_len, sp->myauth.name, 0); 4923 } 4924 } 4925 4926 static void 4927 sppp_chap_rcv_challenge_event(struct sppp *sp, void *xcp) 4928 { 4929 const struct cp *cp = xcp; 4930 4931 KASSERT(!cpu_softintr_p()); 4932 4933 sp->chap.rechallenging = false; 4934 4935 switch (sp->scp[IDX_CHAP].state) { 4936 case STATE_REQ_SENT: 4937 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 4938 cp->scr(sp); 4939 break; 4940 case STATE_OPENED: 4941 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 4942 cp->scr(sp); 4943 break; 4944 } 4945 } 4946 4947 /* 4948 *--------------------------------------------------------------------------* 4949 * * 4950 * The PAP implementation. * 4951 * * 4952 *--------------------------------------------------------------------------* 4953 */ 4954 /* 4955 * PAP uses following actions and events. 4956 * Actions: 4957 * - scr: send PAP_REQ 4958 * - sca: send PAP_ACK 4959 * - scn: send PAP_NAK 4960 * Events: 4961 * - RCR+: receive PAP_REQ containing correct username and password 4962 * - RCR-: receive PAP_REQ containing wrong username and password 4963 * - RCA: receive PAP_ACK 4964 * - RCN: (this event is unused) 4965 * - TO+: re-send PAP_REQ 4966 * - TO-: this layer finish 4967 */ 4968 4969 /* 4970 * Handle incoming PAP packets. */ 4971 static void 4972 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4973 { 4974 STDDCL; 4975 struct lcp_header *h; 4976 int len, x; 4977 char *name, *secret; 4978 int name_len, secret_len; 4979 4980 /* 4981 * Malicious input might leave this uninitialized, so 4982 * init to an impossible value. 4983 */ 4984 secret_len = -1; 4985 4986 len = m->m_pkthdr.len; 4987 if (len < 5) { 4988 if (debug) 4989 log(LOG_DEBUG, 4990 "%s: pap invalid packet length: %d bytes\n", 4991 ifp->if_xname, len); 4992 return; 4993 } 4994 h = mtod(m, struct lcp_header *); 4995 if (len > ntohs(h->len)) 4996 len = ntohs(h->len); 4997 4998 SPPP_LOCK(sp, RW_WRITER); 4999 5000 switch (h->type) { 5001 /* PAP request is my authproto */ 5002 case PAP_REQ: 5003 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 5004 /* can't do anything useful */ 5005 printf("%s: pap request" 5006 " without his name and his secret being set\n", 5007 ifp->if_xname); 5008 break; 5009 } 5010 name = 1 + (u_char *)(h + 1); 5011 name_len = name[-1]; 5012 secret = name + name_len + 1; 5013 if (name_len > len - 6 || 5014 (secret_len = secret[-1]) > len - 6 - name_len) { 5015 if (debug) { 5016 log(LOG_DEBUG, "%s: pap corrupted input " 5017 "<%s id=0x%x len=%d", 5018 ifp->if_xname, 5019 sppp_auth_type_name(PPP_PAP, h->type), 5020 h->ident, ntohs(h->len)); 5021 if (len > 4) 5022 sppp_print_bytes((u_char *)(h + 1), 5023 len - 4); 5024 addlog(">\n"); 5025 } 5026 break; 5027 } 5028 if (debug) { 5029 log(LOG_DEBUG, "%s: pap input(%s) " 5030 "<%s id=0x%x len=%d name=", 5031 ifp->if_xname, 5032 sppp_state_name(sp->scp[IDX_PAP].state), 5033 sppp_auth_type_name(PPP_PAP, h->type), 5034 h->ident, ntohs(h->len)); 5035 sppp_print_string((char *)name, name_len); 5036 addlog(" secret="); 5037 sppp_print_string((char *)secret, secret_len); 5038 addlog(">\n"); 5039 } 5040 5041 sp->scp[IDX_PAP].rconfid = h->ident; 5042 5043 if (name_len == sp->hisauth.name_len && 5044 memcmp(name, sp->hisauth.name, name_len) == 0 && 5045 secret_len == sp->hisauth.secret_len && 5046 memcmp(secret, sp->hisauth.secret, secret_len) == 0) { 5047 sp->scp[IDX_PAP].rcr_type = CP_RCR_ACK; 5048 if (!ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_PEER)) { 5049 /* generate a dummy RCA event*/ 5050 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rca); 5051 } 5052 } else { 5053 sp->scp[IDX_PAP].rcr_type = CP_RCR_NAK; 5054 } 5055 5056 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rcr); 5057 break; 5058 5059 /* ack and nak are his authproto */ 5060 case PAP_ACK: 5061 if (debug) { 5062 log(LOG_DEBUG, "%s: pap success", 5063 ifp->if_xname); 5064 name = 1 + (u_char *)(h + 1); 5065 name_len = name[-1]; 5066 if (len > 5 && name_len < len+4) { 5067 addlog(": "); 5068 sppp_print_string(name, name_len); 5069 } 5070 addlog("\n"); 5071 } 5072 5073 if (h->ident != sp->scp[IDX_PAP].confid) { 5074 if (debug) { 5075 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 5076 ifp->if_xname, pap.name, 5077 h->ident, sp->scp[IDX_PAP].rconfid); 5078 } 5079 if_statinc(ifp, if_ierrors); 5080 break; 5081 } 5082 5083 x = splnet(); 5084 sp->pp_auth_failures = 0; 5085 sp->pp_flags &= ~PP_NEEDAUTH; 5086 splx(x); 5087 5088 /* we are not authenticator, generate a dummy RCR+ event */ 5089 if (!ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_SERV)) { 5090 sp->scp[IDX_PAP].rcr_type = CP_RCR_ACK; 5091 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rcr); 5092 } 5093 5094 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rca); 5095 break; 5096 5097 case PAP_NAK: 5098 if (debug) { 5099 log(LOG_INFO, "%s: pap failure", 5100 ifp->if_xname); 5101 name = 1 + (u_char *)(h + 1); 5102 name_len = name[-1]; 5103 if (len > 5 && name_len < len+4) { 5104 addlog(": "); 5105 sppp_print_string(name, name_len); 5106 } 5107 addlog("\n"); 5108 } else 5109 log(LOG_INFO, "%s: pap failure\n", 5110 ifp->if_xname); 5111 5112 if (h->ident != sp->scp[IDX_PAP].confid) { 5113 if (debug) { 5114 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 5115 ifp->if_xname, pap.name, 5116 h->ident, sp->scp[IDX_PAP].rconfid); 5117 } 5118 if_statinc(ifp, if_ierrors); 5119 break; 5120 } 5121 5122 sp->pp_auth_failures++; 5123 /* 5124 * await LCP shutdown by authenticator, 5125 * so we don't have to enqueue sc->scp[IDX_PAP].work_rcn 5126 */ 5127 break; 5128 5129 default: 5130 /* Unknown PAP packet type -- ignore. */ 5131 if (debug) { 5132 log(LOG_DEBUG, "%s: pap corrupted input " 5133 "<0x%x id=0x%x len=%d", 5134 ifp->if_xname, 5135 h->type, h->ident, ntohs(h->len)); 5136 if (len > 4) 5137 sppp_print_bytes((u_char *)(h + 1), len - 4); 5138 addlog(">\n"); 5139 } 5140 break; 5141 } 5142 5143 SPPP_UNLOCK(sp); 5144 } 5145 5146 static void 5147 sppp_pap_init(struct sppp *sp) 5148 { 5149 5150 KASSERT(SPPP_WLOCKED(sp)); 5151 sppp_cp_init(&pap, sp); 5152 } 5153 5154 static void 5155 sppp_pap_tlu(struct sppp *sp) 5156 { 5157 STDDCL; 5158 int x; 5159 5160 sp->scp[IDX_PAP].rst_counter = sp->lcp.max_configure; 5161 5162 if (debug) 5163 log(LOG_DEBUG, "%s: %s tlu\n", 5164 ifp->if_xname, pap.name); 5165 5166 x = splnet(); 5167 sp->pp_auth_failures = 0; 5168 splx(x); 5169 5170 if (sp->pp_phase < SPPP_PHASE_NETWORK) 5171 sppp_phase_network(sp); 5172 } 5173 5174 static void 5175 sppp_pap_scr(struct sppp *sp) 5176 { 5177 u_char idlen, pwdlen; 5178 5179 KASSERT(SPPP_WLOCKED(sp)); 5180 5181 if (ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_PEER) && 5182 sp->scp[IDX_PAP].state != STATE_ACK_RCVD) { 5183 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 5184 log(LOG_DEBUG, "%s: couldn't send PAP_REQ " 5185 "because of no name or no secret\n", 5186 sp->pp_if.if_xname); 5187 } else { 5188 sp->scp[IDX_PAP].confid = ++sp->scp[IDX_PAP].seq; 5189 pwdlen = sp->myauth.secret_len; 5190 idlen = sp->myauth.name_len; 5191 5192 sppp_auth_send(&pap, sp, PAP_REQ, sp->scp[IDX_PAP].confid, 5193 sizeof idlen, (const char *)&idlen, 5194 idlen, sp->myauth.name, 5195 sizeof pwdlen, (const char *)&pwdlen, 5196 pwdlen, sp->myauth.secret, 5197 0); 5198 } 5199 } 5200 } 5201 5202 /* 5203 * Random miscellaneous functions. 5204 */ 5205 5206 /* 5207 * Send a PAP or CHAP proto packet. 5208 * 5209 * Varadic function, each of the elements for the ellipsis is of type 5210 * ``size_t mlen, const u_char *msg''. Processing will stop iff 5211 * mlen == 0. 5212 * NOTE: never declare variadic functions with types subject to type 5213 * promotion (i.e. u_char). This is asking for big trouble depending 5214 * on the architecture you are on... 5215 */ 5216 5217 static void 5218 sppp_auth_send(const struct cp *cp, struct sppp *sp, 5219 unsigned int type, unsigned int id, 5220 ...) 5221 { 5222 STDDCL; 5223 struct lcp_header *lh; 5224 struct mbuf *m; 5225 u_char *p; 5226 int len; 5227 size_t pkthdrlen; 5228 unsigned int mlen; 5229 const char *msg; 5230 va_list ap; 5231 5232 KASSERT(SPPP_WLOCKED(sp)); 5233 5234 MGETHDR(m, M_DONTWAIT, MT_DATA); 5235 if (! m) 5236 return; 5237 m_reset_rcvif(m); 5238 5239 if (sp->pp_flags & PP_NOFRAMING) { 5240 *mtod(m, uint16_t *) = htons(cp->proto); 5241 pkthdrlen = 2; 5242 lh = (struct lcp_header *)(mtod(m, uint8_t *)+2); 5243 } else { 5244 struct ppp_header *h; 5245 h = mtod(m, struct ppp_header *); 5246 h->address = PPP_ALLSTATIONS; /* broadcast address */ 5247 h->control = PPP_UI; /* Unnumbered Info */ 5248 h->protocol = htons(cp->proto); 5249 pkthdrlen = PPP_HEADER_LEN; 5250 5251 lh = (struct lcp_header *)(h + 1); 5252 } 5253 5254 lh->type = type; 5255 lh->ident = id; 5256 p = (u_char *)(lh + 1); 5257 5258 va_start(ap, id); 5259 len = 0; 5260 5261 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 5262 msg = va_arg(ap, const char *); 5263 len += mlen; 5264 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 5265 va_end(ap); 5266 m_freem(m); 5267 return; 5268 } 5269 5270 memcpy(p, msg, mlen); 5271 p += mlen; 5272 } 5273 va_end(ap); 5274 5275 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 5276 lh->len = htons(LCP_HEADER_LEN + len); 5277 5278 if (debug) { 5279 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 5280 ifp->if_xname, cp->name, 5281 sppp_auth_type_name(cp->proto, lh->type), 5282 lh->ident, ntohs(lh->len)); 5283 if (len) 5284 sppp_print_bytes((u_char *)(lh + 1), len); 5285 addlog(">\n"); 5286 } 5287 if (IF_QFULL(&sp->pp_cpq)) { 5288 IF_DROP(&sp->pp_fastq); 5289 IF_DROP(&ifp->if_snd); 5290 m_freem(m); 5291 if_statinc(ifp, if_oerrors); 5292 return; 5293 } 5294 5295 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 5296 IF_ENQUEUE(&sp->pp_cpq, m); 5297 5298 if (! (ifp->if_flags & IFF_OACTIVE)) { 5299 SPPP_UNLOCK(sp); 5300 if_start_lock(ifp); 5301 SPPP_LOCK(sp, RW_WRITER); 5302 } 5303 } 5304 5305 static int 5306 sppp_auth_role(const struct cp *cp, struct sppp *sp) 5307 { 5308 int role; 5309 5310 role = SPPP_AUTH_NOROLE; 5311 5312 if (sp->hisauth.proto == cp->proto && 5313 ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO)) 5314 SET(role, SPPP_AUTH_SERV); 5315 5316 if (sp->myauth.proto == cp->proto) 5317 SET(role, SPPP_AUTH_PEER); 5318 5319 return role; 5320 } 5321 5322 static void 5323 sppp_auth_to_event(struct sppp *sp, void *xcp) 5324 { 5325 const struct cp *cp = xcp; 5326 bool override; 5327 int state; 5328 STDDCL; 5329 5330 KASSERT(SPPP_WLOCKED(sp)); 5331 KASSERT(!cpu_softintr_p()); 5332 5333 override = false; 5334 state = sp->scp[cp->protoidx].state; 5335 5336 if (sp->scp[cp->protoidx].rst_counter > 0) { 5337 /* override TO+ event */ 5338 switch (state) { 5339 case STATE_OPENED: 5340 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 5341 override = true; 5342 sp->chap.rechallenging = true; 5343 sp->chap.response_rcvd = false; 5344 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 5345 cp->scr(sp); 5346 } 5347 break; 5348 5349 case STATE_ACK_RCVD: 5350 override = true; 5351 cp->scr(sp); 5352 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 5353 break; 5354 } 5355 } 5356 5357 if (override) { 5358 if (debug) 5359 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 5360 ifp->if_xname, cp->name, 5361 sppp_state_name(state), 5362 sp->scp[cp->protoidx].rst_counter); 5363 sp->scp[cp->protoidx].rst_counter--; 5364 } else { 5365 sppp_to_event(sp, xcp); 5366 } 5367 } 5368 5369 static void 5370 sppp_auth_sca_scn(const struct cp *cp, struct sppp *sp) 5371 { 5372 static const char *succmsg = "Welcome!"; 5373 static const char *failmsg = "Failed..."; 5374 const char *msg; 5375 u_char type, rconfid, mlen; 5376 5377 KASSERT(SPPP_WLOCKED(sp)); 5378 5379 if (!ISSET(sppp_auth_role(cp, sp), SPPP_AUTH_SERV)) 5380 return; 5381 5382 rconfid = sp->scp[cp->protoidx].rconfid; 5383 5384 if (sp->scp[cp->protoidx].rcr_type == CP_RCR_ACK) { 5385 type = cp->proto == PPP_CHAP ? CHAP_SUCCESS : PAP_ACK; 5386 msg = succmsg; 5387 mlen = sizeof(succmsg) - 1; 5388 5389 sp->pp_auth_failures = 0; 5390 } else { 5391 type = cp->proto == PPP_CHAP ? CHAP_FAILURE : PAP_NAK; 5392 msg = failmsg; 5393 mlen = sizeof(failmsg) - 1; 5394 5395 /* shutdown LCP if auth failed */ 5396 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5397 sp->pp_auth_failures++; 5398 } 5399 5400 sppp_auth_send(cp, sp, type, rconfid, 5401 mlen, (const u_char *)msg, 0); 5402 } 5403 5404 /* 5405 * Send keepalive packets, every 10 seconds. 5406 */ 5407 static void 5408 sppp_keepalive(void *dummy) 5409 { 5410 struct sppp *sp; 5411 int s; 5412 time_t now; 5413 5414 SPPPQ_LOCK(); 5415 5416 s = splnet(); 5417 now = time_uptime; 5418 for (sp=spppq; sp; sp=sp->pp_next) { 5419 struct ifnet *ifp = NULL; 5420 5421 SPPP_LOCK(sp, RW_WRITER); 5422 ifp = &sp->pp_if; 5423 5424 /* check idle timeout */ 5425 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 5426 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 5427 /* idle timeout is enabled for this interface */ 5428 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 5429 if (ifp->if_flags & IFF_DEBUG) 5430 printf("%s: no activity for %lu seconds\n", 5431 sp->pp_if.if_xname, 5432 (unsigned long)(now-sp->pp_last_activity)); 5433 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5434 SPPP_UNLOCK(sp); 5435 continue; 5436 } 5437 } 5438 5439 /* Keepalive mode disabled or channel down? */ 5440 if (! (sp->pp_flags & PP_KEEPALIVE) || 5441 ! (ifp->if_flags & IFF_RUNNING)) { 5442 SPPP_UNLOCK(sp); 5443 continue; 5444 } 5445 5446 /* No keepalive in PPP mode if LCP not opened yet. */ 5447 if (! (sp->pp_flags & PP_CISCO) && 5448 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 5449 SPPP_UNLOCK(sp); 5450 continue; 5451 } 5452 5453 /* No echo reply, but maybe user data passed through? */ 5454 if ((now - sp->pp_last_receive) < sp->pp_max_noreceive) { 5455 sp->pp_alivecnt = 0; 5456 SPPP_UNLOCK(sp); 5457 continue; 5458 } 5459 5460 if (sp->pp_alivecnt >= sp->pp_maxalive) { 5461 /* No keepalive packets got. Stop the interface. */ 5462 sppp_wq_add(sp->wq_cp, &sp->work_ifdown); 5463 5464 if (! (sp->pp_flags & PP_CISCO)) { 5465 printf("%s: LCP keepalive timed out, going to restart the connection\n", 5466 ifp->if_xname); 5467 sp->pp_alivecnt = 0; 5468 5469 /* we are down, close all open protocols */ 5470 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5471 5472 /* And now prepare LCP to reestablish the link, if configured to do so. */ 5473 sp->lcp.reestablish = true; 5474 5475 SPPP_UNLOCK(sp); 5476 continue; 5477 } 5478 } 5479 if (sp->pp_alivecnt < sp->pp_maxalive) 5480 ++sp->pp_alivecnt; 5481 if (sp->pp_flags & PP_CISCO) 5482 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, 5483 ++sp->scp[IDX_LCP].seq, sp->scp[IDX_LCP].rseq); 5484 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 5485 int32_t nmagic = htonl(sp->lcp.magic); 5486 sp->lcp.echoid = ++sp->scp[IDX_LCP].seq; 5487 sppp_cp_send(sp, PPP_LCP, ECHO_REQ, 5488 sp->lcp.echoid, 4, &nmagic); 5489 } 5490 5491 SPPP_UNLOCK(sp); 5492 } 5493 splx(s); 5494 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 5495 5496 SPPPQ_UNLOCK(); 5497 } 5498 5499 #ifdef INET 5500 /* 5501 * Get both IP addresses. 5502 */ 5503 static void 5504 sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, uint32_t *srcmask) 5505 { 5506 struct ifnet *ifp = &sp->pp_if; 5507 struct ifaddr *ifa; 5508 struct sockaddr_in *si, *sm; 5509 uint32_t ssrc, ddst; 5510 int s; 5511 struct psref psref; 5512 5513 sm = NULL; 5514 ssrc = ddst = 0; 5515 /* 5516 * Pick the first AF_INET address from the list, 5517 * aliases don't make any sense on a p2p link anyway. 5518 */ 5519 si = 0; 5520 s = pserialize_read_enter(); 5521 IFADDR_READER_FOREACH(ifa, ifp) { 5522 if (ifa->ifa_addr->sa_family == AF_INET) { 5523 si = (struct sockaddr_in *)ifa->ifa_addr; 5524 sm = (struct sockaddr_in *)ifa->ifa_netmask; 5525 if (si) { 5526 ifa_acquire(ifa, &psref); 5527 break; 5528 } 5529 } 5530 } 5531 pserialize_read_exit(s); 5532 if (ifa) { 5533 if (si && si->sin_addr.s_addr) { 5534 ssrc = si->sin_addr.s_addr; 5535 if (srcmask) 5536 *srcmask = ntohl(sm->sin_addr.s_addr); 5537 } 5538 5539 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 5540 if (si && si->sin_addr.s_addr) 5541 ddst = si->sin_addr.s_addr; 5542 ifa_release(ifa, &psref); 5543 } 5544 5545 if (dst) *dst = ntohl(ddst); 5546 if (src) *src = ntohl(ssrc); 5547 } 5548 5549 /* 5550 * Set IP addresses. Must be called at splnet. 5551 * If an address is 0, leave it the way it is. 5552 */ 5553 static void 5554 sppp_set_ip_addrs(struct sppp *sp) 5555 { 5556 STDDCL; 5557 struct ifaddr *ifa; 5558 struct sockaddr_in *si, *dest; 5559 uint32_t myaddr = 0, hisaddr = 0; 5560 int s; 5561 5562 KASSERT(SPPP_WLOCKED(sp)); 5563 SPPP_UNLOCK(sp); 5564 IFNET_LOCK(ifp); 5565 SPPP_LOCK(sp, RW_WRITER); 5566 5567 /* 5568 * Pick the first AF_INET address from the list, 5569 * aliases don't make any sense on a p2p link anyway. 5570 */ 5571 si = dest = NULL; 5572 s = pserialize_read_enter(); 5573 IFADDR_READER_FOREACH(ifa, ifp) { 5574 if (ifa->ifa_addr->sa_family == AF_INET) { 5575 si = (struct sockaddr_in *)ifa->ifa_addr; 5576 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5577 break; 5578 } 5579 } 5580 pserialize_read_exit(s); 5581 5582 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 5583 myaddr = sp->ipcp.req_myaddr; 5584 else if (si != NULL) 5585 myaddr = ntohl(si->sin_addr.s_addr); 5586 5587 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 5588 hisaddr = sp->ipcp.req_hisaddr; 5589 else if (dest != NULL) 5590 hisaddr = ntohl(dest->sin_addr.s_addr); 5591 5592 if (si != NULL && dest != NULL) { 5593 int error; 5594 struct sockaddr_in new_sin = *si; 5595 struct sockaddr_in new_dst = *dest; 5596 5597 if (myaddr != 0) 5598 new_sin.sin_addr.s_addr = htonl(myaddr); 5599 if (hisaddr != 0) { 5600 new_dst.sin_addr.s_addr = htonl(hisaddr); 5601 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) 5602 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 5603 } 5604 5605 in_addrhash_remove(ifatoia(ifa)); 5606 5607 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5608 5609 in_addrhash_insert(ifatoia(ifa)); 5610 5611 if (debug && error) 5612 { 5613 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5614 ifp->if_xname, __func__, error); 5615 } 5616 if (!error) { 5617 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5618 } 5619 } 5620 5621 IFNET_UNLOCK(ifp); 5622 5623 sppp_notify_con(sp); 5624 } 5625 5626 /* 5627 * Clear IP addresses. Must be called at splnet. 5628 */ 5629 static void 5630 sppp_clear_ip_addrs(struct sppp *sp) 5631 { 5632 STDDCL; 5633 struct ifaddr *ifa; 5634 struct sockaddr_in *si, *dest; 5635 int s; 5636 5637 KASSERT(SPPP_WLOCKED(sp)); 5638 SPPP_UNLOCK(sp); 5639 IFNET_LOCK(ifp); 5640 SPPP_LOCK(sp, RW_WRITER); 5641 5642 /* 5643 * Pick the first AF_INET address from the list, 5644 * aliases don't make any sense on a p2p link anyway. 5645 */ 5646 si = dest = NULL; 5647 s = pserialize_read_enter(); 5648 IFADDR_READER_FOREACH(ifa, ifp) { 5649 if (ifa->ifa_addr->sa_family == AF_INET) { 5650 si = (struct sockaddr_in *)ifa->ifa_addr; 5651 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5652 break; 5653 } 5654 } 5655 pserialize_read_exit(s); 5656 5657 if (si != NULL) { 5658 struct sockaddr_in new_sin = *si; 5659 struct sockaddr_in new_dst = *dest; 5660 int error; 5661 5662 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 5663 new_sin.sin_addr.s_addr = 0; 5664 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 5665 new_dst.sin_addr.s_addr = sp->ipcp.saved_hisaddr; 5666 5667 in_addrhash_remove(ifatoia(ifa)); 5668 5669 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5670 5671 in_addrhash_insert(ifatoia(ifa)); 5672 5673 if (debug && error) 5674 { 5675 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5676 ifp->if_xname, __func__, error); 5677 } 5678 if (!error) { 5679 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5680 } 5681 } 5682 5683 IFNET_UNLOCK(ifp); 5684 } 5685 #endif 5686 5687 #ifdef INET6 5688 /* 5689 * Get both IPv6 addresses. 5690 */ 5691 static void 5692 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 5693 struct in6_addr *srcmask) 5694 { 5695 struct ifnet *ifp = &sp->pp_if; 5696 struct ifaddr *ifa; 5697 struct sockaddr_in6 *si, *sm; 5698 struct in6_addr ssrc, ddst; 5699 int s; 5700 struct psref psref; 5701 5702 sm = NULL; 5703 memset(&ssrc, 0, sizeof(ssrc)); 5704 memset(&ddst, 0, sizeof(ddst)); 5705 /* 5706 * Pick the first link-local AF_INET6 address from the list, 5707 * aliases don't make any sense on a p2p link anyway. 5708 */ 5709 si = 0; 5710 s = pserialize_read_enter(); 5711 IFADDR_READER_FOREACH(ifa, ifp) { 5712 if (ifa->ifa_addr->sa_family == AF_INET6) { 5713 si = (struct sockaddr_in6 *)ifa->ifa_addr; 5714 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 5715 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) { 5716 ifa_acquire(ifa, &psref); 5717 break; 5718 } 5719 } 5720 } 5721 pserialize_read_exit(s); 5722 5723 if (ifa) { 5724 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 5725 memcpy(&ssrc, &si->sin6_addr, sizeof(ssrc)); 5726 if (srcmask) { 5727 memcpy(srcmask, &sm->sin6_addr, 5728 sizeof(*srcmask)); 5729 } 5730 } 5731 5732 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 5733 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 5734 memcpy(&ddst, &si->sin6_addr, sizeof(ddst)); 5735 ifa_release(ifa, &psref); 5736 } 5737 5738 if (dst) 5739 memcpy(dst, &ddst, sizeof(*dst)); 5740 if (src) 5741 memcpy(src, &ssrc, sizeof(*src)); 5742 } 5743 5744 #ifdef IPV6CP_MYIFID_DYN 5745 /* 5746 * Generate random ifid. 5747 */ 5748 static void 5749 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 5750 { 5751 /* TBD */ 5752 } 5753 5754 /* 5755 * Set my IPv6 address. Must be called at splnet. 5756 */ 5757 static void 5758 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 5759 { 5760 STDDCL; 5761 struct ifaddr *ifa; 5762 struct sockaddr_in6 *sin6; 5763 int s; 5764 struct psref psref; 5765 5766 KASSERT(SPPP_WLOCKED(sp)); 5767 SPPP_UNLOCK(sp); 5768 IFNET_LOCK(ifp); 5769 SPPP_LOCK(sp, RW_WRITER); 5770 5771 /* 5772 * Pick the first link-local AF_INET6 address from the list, 5773 * aliases don't make any sense on a p2p link anyway. 5774 */ 5775 5776 sin6 = NULL; 5777 s = pserialize_read_enter(); 5778 IFADDR_READER_FOREACH(ifa, ifp) 5779 { 5780 if (ifa->ifa_addr->sa_family == AF_INET6) 5781 { 5782 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 5783 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 5784 ifa_acquire(ifa, &psref); 5785 break; 5786 } 5787 } 5788 } 5789 pserialize_read_exit(s); 5790 5791 if (ifa && sin6) 5792 { 5793 int error; 5794 struct sockaddr_in6 new_sin6 = *sin6; 5795 5796 memcpy(&new_sin6.sin6_addr, src, sizeof(new_sin6.sin6_addr)); 5797 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 5798 if (debug && error) 5799 { 5800 log(LOG_DEBUG, "%s: %s: in6_ifinit failed, error=%d\n", 5801 ifp->if_xname, __func__, error); 5802 } 5803 if (!error) { 5804 pfil_run_addrhooks(if_pfil, SIOCAIFADDR_IN6, ifa); 5805 } 5806 ifa_release(ifa, &psref); 5807 } 5808 5809 IFNET_UNLOCK(ifp); 5810 } 5811 #endif 5812 5813 /* 5814 * Suggest a candidate address to be used by peer. 5815 */ 5816 static void 5817 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 5818 { 5819 struct in6_addr myaddr; 5820 struct timeval tv; 5821 5822 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 5823 5824 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 5825 microtime(&tv); 5826 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 5827 myaddr.s6_addr[14] ^= 0xff; 5828 myaddr.s6_addr[15] ^= 0xff; 5829 } else { 5830 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 5831 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 5832 } 5833 if (suggest) 5834 memcpy(suggest, &myaddr, sizeof(myaddr)); 5835 } 5836 #endif /*INET6*/ 5837 5838 /* 5839 * Process ioctl requests specific to the PPP interface. 5840 * Permissions have already been checked. 5841 */ 5842 static int 5843 sppp_params(struct sppp *sp, u_long cmd, void *data) 5844 { 5845 switch (cmd) { 5846 case SPPPGETAUTHCFG: 5847 { 5848 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5849 int error; 5850 size_t len; 5851 5852 SPPP_LOCK(sp, RW_READER); 5853 5854 cfg->myauthflags = sp->myauth.flags; 5855 cfg->hisauthflags = sp->hisauth.flags; 5856 strlcpy(cfg->ifname, sp->pp_if.if_xname, sizeof(cfg->ifname)); 5857 cfg->hisauth = 0; 5858 if (sp->hisauth.proto) 5859 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5860 cfg->myauth = 0; 5861 if (sp->myauth.proto) 5862 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5863 if (cfg->myname_length == 0) { 5864 if (sp->myauth.name != NULL) 5865 cfg->myname_length = sp->myauth.name_len + 1; 5866 } else { 5867 if (sp->myauth.name == NULL) { 5868 cfg->myname_length = 0; 5869 } else { 5870 len = sp->myauth.name_len + 1; 5871 5872 if (cfg->myname_length < len) { 5873 SPPP_UNLOCK(sp); 5874 return (ENAMETOOLONG); 5875 } 5876 error = copyout(sp->myauth.name, cfg->myname, len); 5877 if (error) { 5878 SPPP_UNLOCK(sp); 5879 return error; 5880 } 5881 } 5882 } 5883 if (cfg->hisname_length == 0) { 5884 if (sp->hisauth.name != NULL) 5885 cfg->hisname_length = sp->hisauth.name_len + 1; 5886 } else { 5887 if (sp->hisauth.name == NULL) { 5888 cfg->hisname_length = 0; 5889 } else { 5890 len = sp->hisauth.name_len + 1; 5891 5892 if (cfg->hisname_length < len) { 5893 SPPP_UNLOCK(sp); 5894 return (ENAMETOOLONG); 5895 } 5896 error = copyout(sp->hisauth.name, cfg->hisname, len); 5897 if (error) { 5898 SPPP_UNLOCK(sp); 5899 return error; 5900 } 5901 } 5902 } 5903 SPPP_UNLOCK(sp); 5904 } 5905 break; 5906 case SPPPSETAUTHCFG: 5907 { 5908 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5909 int error; 5910 5911 SPPP_LOCK(sp, RW_WRITER); 5912 5913 if (sp->myauth.name) { 5914 free(sp->myauth.name, M_DEVBUF); 5915 sp->myauth.name = NULL; 5916 } 5917 if (sp->myauth.secret) { 5918 free(sp->myauth.secret, M_DEVBUF); 5919 sp->myauth.secret = NULL; 5920 } 5921 if (sp->hisauth.name) { 5922 free(sp->hisauth.name, M_DEVBUF); 5923 sp->hisauth.name = NULL; 5924 } 5925 if (sp->hisauth.secret) { 5926 free(sp->hisauth.secret, M_DEVBUF); 5927 sp->hisauth.secret = NULL; 5928 } 5929 5930 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5931 if (cfg->hisname_length >= MCLBYTES) { 5932 SPPP_UNLOCK(sp); 5933 return (ENAMETOOLONG); 5934 } 5935 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5936 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5937 if (error) { 5938 free(sp->hisauth.name, M_DEVBUF); 5939 sp->hisauth.name = NULL; 5940 SPPP_UNLOCK(sp); 5941 return error; 5942 } 5943 sp->hisauth.name_len = cfg->hisname_length - 1; 5944 sp->hisauth.name[sp->hisauth.name_len] = 0; 5945 } 5946 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5947 if (cfg->hissecret_length >= MCLBYTES) { 5948 SPPP_UNLOCK(sp); 5949 return (ENAMETOOLONG); 5950 } 5951 sp->hisauth.secret = malloc(cfg->hissecret_length, 5952 M_DEVBUF, M_WAITOK); 5953 error = copyin(cfg->hissecret, sp->hisauth.secret, 5954 cfg->hissecret_length); 5955 if (error) { 5956 free(sp->hisauth.secret, M_DEVBUF); 5957 sp->hisauth.secret = NULL; 5958 SPPP_UNLOCK(sp); 5959 return error; 5960 } 5961 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5962 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5963 } 5964 if (cfg->myname != NULL && cfg->myname_length > 0) { 5965 if (cfg->myname_length >= MCLBYTES) { 5966 SPPP_UNLOCK(sp); 5967 return (ENAMETOOLONG); 5968 } 5969 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5970 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5971 if (error) { 5972 free(sp->myauth.name, M_DEVBUF); 5973 sp->myauth.name = NULL; 5974 SPPP_UNLOCK(sp); 5975 return error; 5976 } 5977 sp->myauth.name_len = cfg->myname_length - 1; 5978 sp->myauth.name[sp->myauth.name_len] = 0; 5979 } 5980 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5981 if (cfg->mysecret_length >= MCLBYTES) { 5982 SPPP_UNLOCK(sp); 5983 return (ENAMETOOLONG); 5984 } 5985 sp->myauth.secret = malloc(cfg->mysecret_length, 5986 M_DEVBUF, M_WAITOK); 5987 error = copyin(cfg->mysecret, sp->myauth.secret, 5988 cfg->mysecret_length); 5989 if (error) { 5990 free(sp->myauth.secret, M_DEVBUF); 5991 sp->myauth.secret = NULL; 5992 SPPP_UNLOCK(sp); 5993 return error; 5994 } 5995 sp->myauth.secret_len = cfg->mysecret_length - 1; 5996 sp->myauth.secret[sp->myauth.secret_len] = 0; 5997 } 5998 sp->myauth.flags = cfg->myauthflags; 5999 if (cfg->myauth) 6000 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 6001 sp->hisauth.flags = cfg->hisauthflags; 6002 if (cfg->hisauth) 6003 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 6004 sp->pp_auth_failures = 0; 6005 if (sp->hisauth.proto != 0) 6006 SET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 6007 else 6008 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 6009 6010 SPPP_UNLOCK(sp); 6011 } 6012 break; 6013 case SPPPGETLCPCFG: 6014 { 6015 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 6016 6017 SPPP_LOCK(sp, RW_READER); 6018 lcpp->lcp_timeout = sp->lcp.timeout; 6019 SPPP_UNLOCK(sp); 6020 } 6021 break; 6022 case SPPPSETLCPCFG: 6023 { 6024 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 6025 6026 SPPP_LOCK(sp, RW_WRITER); 6027 sp->lcp.timeout = lcpp->lcp_timeout; 6028 SPPP_UNLOCK(sp); 6029 } 6030 break; 6031 case SPPPGETSTATUS: 6032 { 6033 struct spppstatus *status = (struct spppstatus *)data; 6034 6035 SPPP_LOCK(sp, RW_READER); 6036 status->phase = sp->pp_phase; 6037 SPPP_UNLOCK(sp); 6038 } 6039 break; 6040 case SPPPGETSTATUSNCP: 6041 { 6042 struct spppstatusncp *status = (struct spppstatusncp *)data; 6043 6044 SPPP_LOCK(sp, RW_READER); 6045 status->phase = sp->pp_phase; 6046 status->ncpup = sppp_cp_check(sp, CP_NCP); 6047 SPPP_UNLOCK(sp); 6048 } 6049 break; 6050 case SPPPGETIDLETO: 6051 { 6052 struct spppidletimeout *to = (struct spppidletimeout *)data; 6053 6054 SPPP_LOCK(sp, RW_READER); 6055 to->idle_seconds = sp->pp_idle_timeout; 6056 SPPP_UNLOCK(sp); 6057 } 6058 break; 6059 case SPPPSETIDLETO: 6060 { 6061 struct spppidletimeout *to = (struct spppidletimeout *)data; 6062 6063 SPPP_LOCK(sp, RW_WRITER); 6064 sp->pp_idle_timeout = to->idle_seconds; 6065 SPPP_UNLOCK(sp); 6066 } 6067 break; 6068 case SPPPSETAUTHFAILURE: 6069 { 6070 struct spppauthfailuresettings *afsettings = 6071 (struct spppauthfailuresettings *)data; 6072 6073 SPPP_LOCK(sp, RW_WRITER); 6074 sp->pp_max_auth_fail = afsettings->max_failures; 6075 sp->pp_auth_failures = 0; 6076 SPPP_UNLOCK(sp); 6077 } 6078 break; 6079 case SPPPGETAUTHFAILURES: 6080 { 6081 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 6082 6083 SPPP_LOCK(sp, RW_READER); 6084 stats->auth_failures = sp->pp_auth_failures; 6085 stats->max_failures = sp->pp_max_auth_fail; 6086 SPPP_UNLOCK(sp); 6087 } 6088 break; 6089 case SPPPSETDNSOPTS: 6090 { 6091 struct spppdnssettings *req = (struct spppdnssettings *)data; 6092 6093 SPPP_LOCK(sp, RW_WRITER); 6094 sp->query_dns = req->query_dns & 3; 6095 SPPP_UNLOCK(sp); 6096 } 6097 break; 6098 case SPPPGETDNSOPTS: 6099 { 6100 struct spppdnssettings *req = (struct spppdnssettings *)data; 6101 6102 SPPP_LOCK(sp, RW_READER); 6103 req->query_dns = sp->query_dns; 6104 SPPP_UNLOCK(sp); 6105 } 6106 break; 6107 case SPPPGETDNSADDRS: 6108 { 6109 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; 6110 6111 SPPP_LOCK(sp, RW_READER); 6112 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 6113 SPPP_UNLOCK(sp); 6114 } 6115 break; 6116 case SPPPGETKEEPALIVE: 6117 { 6118 struct spppkeepalivesettings *settings = 6119 (struct spppkeepalivesettings*)data; 6120 6121 SPPP_LOCK(sp, RW_READER); 6122 settings->maxalive = sp->pp_maxalive; 6123 settings->max_noreceive = sp->pp_max_noreceive; 6124 SPPP_UNLOCK(sp); 6125 } 6126 break; 6127 case SPPPSETKEEPALIVE: 6128 { 6129 struct spppkeepalivesettings *settings = 6130 (struct spppkeepalivesettings*)data; 6131 6132 SPPP_LOCK(sp, RW_WRITER); 6133 sp->pp_maxalive = settings->maxalive; 6134 sp->pp_max_noreceive = settings->max_noreceive; 6135 SPPP_UNLOCK(sp); 6136 } 6137 break; 6138 case SPPPGETLCPSTATUS: 6139 { 6140 struct sppplcpstatus *status = 6141 (struct sppplcpstatus *)data; 6142 6143 SPPP_LOCK(sp, RW_READER); 6144 status->state = sp->scp[IDX_LCP].state; 6145 status->opts = sp->lcp.opts; 6146 status->magic = sp->lcp.magic; 6147 status->mru = sp->lcp.mru; 6148 SPPP_UNLOCK(sp); 6149 } 6150 break; 6151 case SPPPGETIPCPSTATUS: 6152 { 6153 struct spppipcpstatus *status = 6154 (struct spppipcpstatus *)data; 6155 u_int32_t myaddr; 6156 6157 SPPP_LOCK(sp, RW_READER); 6158 status->state = sp->scp[IDX_IPCP].state; 6159 status->opts = sp->ipcp.opts; 6160 #ifdef INET 6161 kpreempt_disable(); 6162 sppp_get_ip_addrs(sp, &myaddr, 0, 0); 6163 kpreempt_enable(); 6164 #else 6165 myaddr = 0; 6166 #endif 6167 status->myaddr = ntohl(myaddr); 6168 SPPP_UNLOCK(sp); 6169 } 6170 break; 6171 case SPPPGETIPV6CPSTATUS: 6172 { 6173 struct spppipv6cpstatus *status = 6174 (struct spppipv6cpstatus *)data; 6175 6176 SPPP_LOCK(sp, RW_READER); 6177 status->state = sp->scp[IDX_IPV6CP].state; 6178 memcpy(status->my_ifid, sp->ipv6cp.my_ifid, 6179 sizeof(status->my_ifid)); 6180 memcpy(status->his_ifid, sp->ipv6cp.his_ifid, 6181 sizeof(status->his_ifid)); 6182 SPPP_UNLOCK(sp); 6183 } 6184 break; 6185 default: 6186 { 6187 int ret; 6188 6189 MODULE_HOOK_CALL(sppp_params_50_hook, (sp, cmd, data), 6190 enosys(), ret); 6191 if (ret != ENOSYS) 6192 return ret; 6193 return (EINVAL); 6194 } 6195 } 6196 return (0); 6197 } 6198 6199 static void 6200 sppp_phase_network(struct sppp *sp) 6201 { 6202 int i; 6203 6204 KASSERT(SPPP_WLOCKED(sp)); 6205 6206 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 6207 6208 /* Notify NCPs now. */ 6209 for (i = 0; i < IDX_COUNT; i++) 6210 if ((cps[i])->flags & CP_NCP) 6211 sppp_wq_add(sp->wq_cp, &sp->scp[i].work_open); 6212 } 6213 6214 static const char * 6215 sppp_cp_type_name(u_char type) 6216 { 6217 static char buf[12]; 6218 switch (type) { 6219 case CONF_REQ: return "conf-req"; 6220 case CONF_ACK: return "conf-ack"; 6221 case CONF_NAK: return "conf-nak"; 6222 case CONF_REJ: return "conf-rej"; 6223 case TERM_REQ: return "term-req"; 6224 case TERM_ACK: return "term-ack"; 6225 case CODE_REJ: return "code-rej"; 6226 case PROTO_REJ: return "proto-rej"; 6227 case ECHO_REQ: return "echo-req"; 6228 case ECHO_REPLY: return "echo-reply"; 6229 case DISC_REQ: return "discard-req"; 6230 } 6231 snprintf(buf, sizeof(buf), "0x%x", type); 6232 return buf; 6233 } 6234 6235 static const char * 6236 sppp_auth_type_name(u_short proto, u_char type) 6237 { 6238 static char buf[32]; 6239 const char *name; 6240 6241 switch (proto) { 6242 case PPP_CHAP: 6243 switch (type) { 6244 case CHAP_CHALLENGE: return "challenge"; 6245 case CHAP_RESPONSE: return "response"; 6246 case CHAP_SUCCESS: return "success"; 6247 case CHAP_FAILURE: return "failure"; 6248 default: name = "chap"; break; 6249 } 6250 break; 6251 6252 case PPP_PAP: 6253 switch (type) { 6254 case PAP_REQ: return "req"; 6255 case PAP_ACK: return "ack"; 6256 case PAP_NAK: return "nak"; 6257 default: name = "pap"; break; 6258 } 6259 break; 6260 6261 default: 6262 name = "bad"; 6263 break; 6264 } 6265 6266 snprintf(buf, sizeof(buf), "%s(%#x) %#x", name, proto, type); 6267 return buf; 6268 } 6269 6270 static const char * 6271 sppp_lcp_opt_name(u_char opt) 6272 { 6273 static char buf[12]; 6274 switch (opt) { 6275 case LCP_OPT_MRU: return "mru"; 6276 case LCP_OPT_ASYNC_MAP: return "async-map"; 6277 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 6278 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 6279 case LCP_OPT_MAGIC: return "magic"; 6280 case LCP_OPT_PROTO_COMP: return "proto-comp"; 6281 case LCP_OPT_ADDR_COMP: return "addr-comp"; 6282 case LCP_OPT_SELF_DESC_PAD: return "sdpad"; 6283 case LCP_OPT_CALL_BACK: return "callback"; 6284 case LCP_OPT_COMPOUND_FRMS: return "cmpd-frms"; 6285 case LCP_OPT_MP_MRRU: return "mrru"; 6286 case LCP_OPT_MP_SSNHF: return "mp-ssnhf"; 6287 case LCP_OPT_MP_EID: return "mp-eid"; 6288 } 6289 snprintf(buf, sizeof(buf), "0x%x", opt); 6290 return buf; 6291 } 6292 6293 static const char * 6294 sppp_ipcp_opt_name(u_char opt) 6295 { 6296 static char buf[12]; 6297 switch (opt) { 6298 case IPCP_OPT_ADDRESSES: return "addresses"; 6299 case IPCP_OPT_COMPRESSION: return "compression"; 6300 case IPCP_OPT_ADDRESS: return "address"; 6301 case IPCP_OPT_PRIMDNS: return "primdns"; 6302 case IPCP_OPT_SECDNS: return "secdns"; 6303 } 6304 snprintf(buf, sizeof(buf), "0x%x", opt); 6305 return buf; 6306 } 6307 6308 #ifdef INET6 6309 static const char * 6310 sppp_ipv6cp_opt_name(u_char opt) 6311 { 6312 static char buf[12]; 6313 switch (opt) { 6314 case IPV6CP_OPT_IFID: return "ifid"; 6315 case IPV6CP_OPT_COMPRESSION: return "compression"; 6316 } 6317 snprintf(buf, sizeof(buf), "0x%x", opt); 6318 return buf; 6319 } 6320 #endif 6321 6322 static const char * 6323 sppp_state_name(int state) 6324 { 6325 switch (state) { 6326 case STATE_INITIAL: return "initial"; 6327 case STATE_STARTING: return "starting"; 6328 case STATE_CLOSED: return "closed"; 6329 case STATE_STOPPED: return "stopped"; 6330 case STATE_CLOSING: return "closing"; 6331 case STATE_STOPPING: return "stopping"; 6332 case STATE_REQ_SENT: return "req-sent"; 6333 case STATE_ACK_RCVD: return "ack-rcvd"; 6334 case STATE_ACK_SENT: return "ack-sent"; 6335 case STATE_OPENED: return "opened"; 6336 } 6337 return "illegal"; 6338 } 6339 6340 static const char * 6341 sppp_phase_name(int phase) 6342 { 6343 switch (phase) { 6344 case SPPP_PHASE_DEAD: return "dead"; 6345 case SPPP_PHASE_ESTABLISH: return "establish"; 6346 case SPPP_PHASE_TERMINATE: return "terminate"; 6347 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 6348 case SPPP_PHASE_NETWORK: return "network"; 6349 } 6350 return "illegal"; 6351 } 6352 6353 static const char * 6354 sppp_proto_name(u_short proto) 6355 { 6356 static char buf[12]; 6357 switch (proto) { 6358 case PPP_LCP: return "lcp"; 6359 case PPP_IPCP: return "ipcp"; 6360 case PPP_PAP: return "pap"; 6361 case PPP_CHAP: return "chap"; 6362 case PPP_IPV6CP: return "ipv6cp"; 6363 } 6364 snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto); 6365 return buf; 6366 } 6367 6368 static void 6369 sppp_print_bytes(const u_char *p, u_short len) 6370 { 6371 addlog(" %02x", *p++); 6372 while (--len > 0) 6373 addlog("-%02x", *p++); 6374 } 6375 6376 static void 6377 sppp_print_string(const char *p, u_short len) 6378 { 6379 u_char c; 6380 6381 while (len-- > 0) { 6382 c = *p++; 6383 /* 6384 * Print only ASCII chars directly. RFC 1994 recommends 6385 * using only them, but we don't rely on it. */ 6386 if (c < ' ' || c > '~') 6387 addlog("\\x%x", c); 6388 else 6389 addlog("%c", c); 6390 } 6391 } 6392 6393 static const char * 6394 sppp_dotted_quad(uint32_t addr) 6395 { 6396 static char s[16]; 6397 snprintf(s, sizeof(s), "%d.%d.%d.%d", 6398 (int)((addr >> 24) & 0xff), 6399 (int)((addr >> 16) & 0xff), 6400 (int)((addr >> 8) & 0xff), 6401 (int)(addr & 0xff)); 6402 return s; 6403 } 6404 6405 /* a dummy, used to drop uninteresting events */ 6406 static void 6407 sppp_null(struct sppp *unused) 6408 { 6409 /* do just nothing */ 6410 } 6411 6412 static void 6413 sppp_tls(const struct cp *cp, struct sppp *sp) 6414 { 6415 6416 /* notify lcp that is lower layer */ 6417 sp->lcp.protos |= (1 << cp->protoidx); 6418 6419 if (sp->scp[IDX_LCP].state == STATE_OPENED) 6420 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_up); 6421 } 6422 6423 static void 6424 sppp_tlf(const struct cp *cp, struct sppp *sp) 6425 { 6426 STDDCL; 6427 6428 if (debug) 6429 log(LOG_DEBUG, "%s: %s tlf\n", ifp->if_xname, cp->name); 6430 6431 /* notify lcp that is lower layer */ 6432 sp->lcp.protos &= ~(1 << cp->protoidx); 6433 6434 /* cleanup */ 6435 if (sp->scp[cp->protoidx].rcr_buf != NULL) { 6436 kmem_free(sp->scp[cp->protoidx].rcr_buf, 6437 sp->scp[cp->protoidx].rcr_blen); 6438 } 6439 6440 sp->scp[cp->protoidx].rcr_buf = NULL; 6441 sp->scp[cp->protoidx].rcr_blen = 0; 6442 sp->scp[cp->protoidx].rcr_rlen = 0; 6443 6444 sppp_lcp_check_and_close(sp); 6445 } 6446 6447 static void 6448 sppp_sca_scn(const struct cp *cp, struct sppp *sp) 6449 { 6450 STDDCL; 6451 u_char rconfid, rlen; 6452 int type; 6453 void *buf; 6454 size_t blen; 6455 6456 rconfid = sp->scp[cp->protoidx].rconfid; 6457 buf = sp->scp[cp->protoidx].rcr_buf; 6458 rlen = sp->scp[cp->protoidx].rcr_rlen; 6459 blen = sp->scp[cp->protoidx].rcr_blen; 6460 6461 sp->scp[cp->protoidx].rcr_buf = NULL; 6462 sp->scp[cp->protoidx].rcr_blen = 0; 6463 6464 switch (sp->scp[cp->protoidx].rcr_type) { 6465 case CP_RCR_ACK: 6466 type = CONF_ACK; 6467 break; 6468 case CP_RCR_REJ: 6469 type = CONF_REJ; 6470 break; 6471 case CP_RCR_NAK: 6472 type = CONF_NAK; 6473 break; 6474 default: 6475 type = -1; 6476 break; 6477 } 6478 6479 sp->scp[cp->protoidx].rcr_type = CP_RCR_NONE; 6480 6481 if (buf != NULL) { 6482 if (rlen > 0 && type != -1) { 6483 if (debug) { 6484 log(LOG_DEBUG, "%s: send %s\n", 6485 ifp->if_xname, sppp_cp_type_name(type)); 6486 } 6487 sppp_cp_send(sp, cp->proto, type, rconfid, rlen, buf); 6488 } 6489 kmem_free(buf, blen); 6490 } 6491 } 6492 6493 static void 6494 sppp_ifdown(struct sppp *sp, void *xcp __unused) 6495 { 6496 6497 SPPP_UNLOCK(sp); 6498 if_down(&sp->pp_if); 6499 IF_PURGE(&sp->pp_cpq); 6500 SPPP_LOCK(sp, RW_WRITER); 6501 } 6502 6503 static void 6504 sppp_notify_up(struct sppp *sp) 6505 { 6506 6507 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_up); 6508 } 6509 6510 static void 6511 sppp_notify_down(struct sppp *sp) 6512 { 6513 6514 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_down); 6515 } 6516 6517 static void 6518 sppp_notify_tls_wlocked(struct sppp *sp) 6519 { 6520 6521 KASSERT(SPPP_WLOCKED(sp)); 6522 6523 if (!sp->pp_tls) 6524 return; 6525 6526 SPPP_UNLOCK(sp); 6527 sp->pp_tls(sp); 6528 SPPP_LOCK(sp, RW_WRITER); 6529 } 6530 6531 static void 6532 sppp_notify_tlf_wlocked(struct sppp *sp) 6533 { 6534 6535 KASSERT(SPPP_WLOCKED(sp)); 6536 6537 if (!sp->pp_tlf) 6538 return; 6539 6540 SPPP_UNLOCK(sp); 6541 sp->pp_tlf(sp); 6542 SPPP_LOCK(sp, RW_WRITER); 6543 } 6544 6545 static void 6546 sppp_notify_con(struct sppp *sp) 6547 { 6548 6549 if (!sp->pp_con) 6550 return; 6551 6552 sp->pp_con(sp); 6553 } 6554 6555 #ifdef INET6 6556 static void 6557 sppp_notify_con_wlocked(struct sppp *sp) 6558 { 6559 6560 KASSERT(SPPP_WLOCKED(sp)); 6561 6562 SPPP_UNLOCK(sp); 6563 sppp_notify_con(sp); 6564 SPPP_LOCK(sp, RW_WRITER); 6565 6566 } 6567 #endif 6568 6569 static void 6570 sppp_notify_chg_wlocked(struct sppp *sp) 6571 { 6572 6573 KASSERT(SPPP_WLOCKED(sp)); 6574 6575 if (!sp->pp_chg) 6576 return; 6577 6578 SPPP_UNLOCK(sp); 6579 sp->pp_chg(sp, sp->pp_phase); 6580 SPPP_LOCK(sp, RW_WRITER); 6581 } 6582 6583 static void 6584 sppp_wq_work(struct work *wk, void *xsp) 6585 { 6586 struct sppp *sp; 6587 struct sppp_work *work; 6588 6589 sp = xsp; 6590 work = container_of(wk, struct sppp_work, work); 6591 atomic_cas_uint(&work->state, SPPP_WK_BUSY, SPPP_WK_FREE); 6592 6593 SPPP_LOCK(sp, RW_WRITER); 6594 work->func(sp, work->arg); 6595 SPPP_UNLOCK(sp); 6596 } 6597 6598 static struct workqueue * 6599 sppp_wq_create(struct sppp *sp, const char *xnamebuf, pri_t prio, int ipl, int flags) 6600 { 6601 struct workqueue *wq; 6602 int error; 6603 6604 error = workqueue_create(&wq, xnamebuf, sppp_wq_work, 6605 (void *)sp, prio, ipl, flags); 6606 if (error) { 6607 panic("%s: workqueue_create failed [%s, %d]\n", 6608 sp->pp_if.if_xname, xnamebuf, error); 6609 } 6610 6611 return wq; 6612 } 6613 6614 static void 6615 sppp_wq_destroy(struct sppp *sp __unused, struct workqueue *wq) 6616 { 6617 6618 workqueue_destroy(wq); 6619 } 6620 6621 static void 6622 sppp_wq_set(struct sppp_work *work, 6623 void (*func)(struct sppp *, void *), void *arg) 6624 { 6625 6626 work->func = func; 6627 work->arg = arg; 6628 } 6629 6630 static void 6631 sppp_wq_add(struct workqueue *wq, struct sppp_work *work) 6632 { 6633 6634 if (atomic_cas_uint(&work->state, SPPP_WK_FREE, SPPP_WK_BUSY) 6635 != SPPP_WK_FREE) 6636 return; 6637 6638 KASSERT(work->func != NULL); 6639 kpreempt_disable(); 6640 workqueue_enqueue(wq, &work->work, NULL); 6641 kpreempt_enable(); 6642 } 6643 static void 6644 sppp_wq_wait(struct workqueue *wq, struct sppp_work *work) 6645 { 6646 6647 atomic_swap_uint(&work->state, SPPP_WK_UNAVAIL); 6648 workqueue_wait(wq, &work->work); 6649 } 6650 6651 /* 6652 * This file is large. Tell emacs to highlight it nevertheless. 6653 * 6654 * Local Variables: 6655 * hilit-auto-highlight-maxout: 120000 6656 * End: 6657 */ 6658 6659 /* 6660 * Module glue 6661 */ 6662 MODULE(MODULE_CLASS_MISC, sppp_subr, NULL); 6663 6664 static int 6665 sppp_subr_modcmd(modcmd_t cmd, void *arg) 6666 { 6667 6668 switch (cmd) { 6669 case MODULE_CMD_INIT: 6670 case MODULE_CMD_FINI: 6671 return 0; 6672 case MODULE_CMD_STAT: 6673 case MODULE_CMD_AUTOUNLOAD: 6674 default: 6675 return ENOTTY; 6676 } 6677 } 6678
Indexes created Tue Sep 30 10:09:55 GMT 2025